Bump version: 1.12.0.37-cf65-dirty → 1.13.0

Change-Id: I7dbdd71d62fb13ba2ffc30d7d50fb4207a06340b
gtp: split gtp_req into 2 parts: transmit and fill header
2025-11-03 21:53:25 +00:00 · 2025-02-12 12:09:58 +01:00 · 2025-01-12 21:03:39 +01:00 · 2025-01-12 21:03:27 +01:00 · 2025-01-07 13:39:01 +01:00 · 2025-01-07 13:35:54 +01:00
141 changed files with 96026 additions and 7771 deletions
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
 open_collective: osmocom
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,9 @@
 # autotools
 Makefile
 Makefile.in
 aclocal.m4
 autom4te.cache
 compile
 config.guess
 config.h.in*
 config.h
@@ -14,33 +16,73 @@ install-sh
 libtool
 ltmain.sh
 missing
 openggsn.spec
 stamp-h1
 doc/Makefile.in
 ggsn/Makefile.in
 gtp/Makefile.in
 sgsnemu/Makefile.in
 debian/openggsn/
 debian/*.debhelper
 debian/libgtp/
 debian/*.log
 INSTALL
 m4/
 Makefile
 osmo-ggsn-*.tar*
 .version
 .tarball-version
 # debian
 debian/osmo-ggsn/
 debian/*.debhelper
 debian/libgtp*/
 debian/osmo-ggsn-dbg
 debian/*.log
 debian/autoreconf.*
 debian/*.substvars
 debian/tmp/
 sgsnemu/sgsnemu
 debian/files
 debian/libgtp-dev/
 # programs / libraries
 sgsnemu/sgsnemu
 libgtp.pc
-ggsn/ggsn
+ggsn/osmo-ggsn
-m4/
+
-*.swp
+# compiler results
 *.o
 *.a
 *.la
 *.lo
 *.pyc
 .deps
 .libs
 # misc
 *.swp
 .dirstamp
 .deps
 *.orig
 *.new
 *.rej
-*/.deps
+*~
-*/.libs
+osmo-ggsn.cfg
-*/Makefile
+sgsnemu.pid
 gsn_restart
 # testsuite
 tests/atconfig
 tests/*/*_test
 tests/testsuite
 tests/testsuite.log
 tests/package.m4
 # manuals
 doc/manuals/*.html
 doc/manuals/*.svg
 doc/manuals/*.pdf
 doc/manuals/*__*.png
 doc/manuals/*.check
 doc/manuals/generated/
 doc/manuals/osmomsc-usermanual.xml
 doc/manuals/common
 doc/manuals/build
 doc/manuals/vty/ggsn_vty_reference.xml
 contrib/osmo-ggsn.spec
 /debian/gtp-echo-responder-dbg/
 /debian/gtp-echo-responder/
 /debian/osmo-ggsn-doc/
 /utils/gtp-echo-responder
--- a/.gitreview
+++ b/.gitreview
@@ -0,0 +1,3 @@
 [gerrit]
 host=gerrit.osmocom.org
 project=osmo-ggsn
--- a/23
+++ b/23
@@ -1,9 +1,16 @@
-OpenGGSN - Gateway GPRS Support Node
+OsmoGGSN - Osmocom Gateway GPRS Support Node, based on OpenGGSN
-Copyright (C) 2002 Mondru AB.
+Copyright (C) 2002-2004 Mondru AB, Author: Jens Jakobsen <jj@openggsn.org>
-
+Copyright (C) 2010-2017 Harald Welte <laforge@gnumonks.org>
-The initial developer of the original code is
+Copyright (C) 2012-2016 Holger Hans Peter Freyther <zecke@selfish.org>
-Jens Jakobsen <jj@openggsn.org>
+Copyright (C) 2014-2016 Pablo Neira Ayuso <pablo@gnumonks.org>
-
+Copyright (C) 2014-2016 sysmocom - s.f.m.c. GmbH
 Contributor(s):
 Contributors:
 Emmanuel Bretelle <chantra@debuntu.org>
 Yann BONNAMY <yann_bonnamy@yahoo.fr>
 Eric Butler <eric@codebutler.com>
 Michael McTernan <mike.mcternan@wavemobile.com>
 Alexander Huemer <alexander.huemer@xx.vu>
 BJovke <bjovan@gmail.com>
 Alexander Couzens <lynxis@fe80.eu>
 Ruben Undheim <ruben.undheim@gmail.com>
--- a/142
+++ b/142
@@ -1,142 +0,0 @@
 2004-12-30: Jens Jakobsen <jj@openggsn.org>
        Initial MAC OS X support
 	Quality assurance and improved error logging
 	QoS length bug fix.
 2004-09-11: Jens Jakobsen <jj@openggsn.org>
 	Added selection mode option to sgsnemu.
 	Added charging characteristics option to sgsnemu.
 	Only include charging characteristics in create PDP context
 	request is if flags are set. (Thanks to Loic Bernable
 	<leto@vilya.org>).
 	PPP PCO length bug fix. (Thanks to Loic Bernable
 	<leto@vilya.org>).
 	IP pool hash table bugfix and improved logging.
 	Improved configure.in and Makefile.am for compilation under
 	Solaris. New config.sub and config.guess.
 2004-04-28: Jens Jakobsen <jj@openggsn.org>
 	Improved Solaris support. OpenGGSN now correctly initializes
 	tun/tap driver under Solaris. As a consequence the ggsn network
 	interface IP address is set to the network address plus one.
 	Added routing manipulation and IP address alias capability for
 	FreeBSD.
 2004-01-19: Jens Jakobsen <jj@openggsn.org>
 	Initial FreeBSD port (Thanks to	Pavel Andreev <pavel.andreev@hp.com>).
 	IMSI bugfix. The IMSI encoding used by create PDP context was
 	missing the leading '1111' to indicate that the 16'nd digit was
 	unused. (Thanks to Pavel Andreev <pavel.andreev@hp.com>).
 2004-01-15: Jens Jakobsen <jj@openggsn.org>
 	Added iptables firewall script.
 2004-01-14: Jens Jakobsen <jj@openggsn.org>
 	Changes to allow compilation under Solaris: u_int8_t changed to uint8_t
 	and tun api changed for sun platform (#ifdef).
 2004-01-09: Jens Jakobsen <jj@openggsn.org>
 	Fixed bug which included NSAPI in GTPv0 create PDP context messages.
 2003-11-10: Jens Jakobsen <jj@openggsn.org>
 	Added --net option for sgsnemu. Allow user to specify the network
 	address and mask of the local interface.
 	Added --gtpversion option for sgsnemu. Allow user to specify which
 	GTP version to use.
 	Added --nsapi option for sgsnemu. Allow user to specify which
 	NSAPI to use.
 	Changed the functionality for multiple contexts. Previously
 	contexts were differentiated by nsapi. This limited the number of
 	contexts to 16. Now each context is established with a new imsi
 	and msisdn.
 2003-10-22: Jens Jakobsen <jj@openggsn.org>
 	Support for GTP1. Currently without support for the secondary pdp
 	context activation procedure.
 	sgsnemu will first attempt to use GTP1. If that fails it will
 	proceed with GTP0.
 	Various gtplib API changes to allow support for GTP1.
 	gtplib now listens to 3 separate UDP ports: GTP0, GTP1 control
 	plane and GTP1 user plane. A socket for each port has to be
 	included in the application select loop.
 	gtplib now verifies that messages are valid for the particular
 	type of support node. As an example a received Create PDP Context
 	Request message is not allowed for an SGSN.
 	Standards compliance document.
 2003-07-07: Jens Jakobsen <jj@openggsn.org>
 	Added spec.in file for building binary RPM packages. Now openggsn
 	will install binaries, man pages as well as scripts.
 	Added ggsn and sgsnemu man pages
 	Added ggsn Sys V init script
 	Added bootstrap script for autotools automation
 2003-04-11: Jens Jakobsen <jj@openggsn.org>
 	Added -ggdb to gtp, sgsnemu and ggsn makefiles in order to include
 	debugging information.
 	Added ippool.c and ippool.h to ggsn. This allows for generic
 	allocation of dynamic ip addresses based on a <net>/<mask>
 	description of ip address space. The same files are also used in
 	sgsnemu, but only for hashing IP addresses. At the same time the
 	corresponding functionality is removed from pdp.c.
 	Added syserr.h and syserr.c to ggsn and sgsnemu. These files allow
 	writing to syslog with file name and line number. Later this
 	should also be introduced in gtp.
 	Added support for DNS protocol configuration options in ggsn for
 	create context response. This allow the MS to setup DNS
 	configuration correctly.
 	tun.c and tun.h have been updated to allow setting interface IP
 	addresses and routes by means of ioctl and netlink. This allow
 	sgsnemu to allocate an interface IP address for each context
 	established.
 2003-01-29: Jens Jakobsen <jj@openggsn.org>
 	Added -L../gtp to sgsnemu and ggsn makefiles so that make will
 	work without an installed libgtp.
 	Added sgsnemu check to check for valid pointer when deleting tun.
 	Removed enabling of ip_forward = 1 from ggsn.c and sgsnemu. From a
 	security point of view it was not very good that openggsn
 	automatically enabled routing.
 	Added ipup, ipdown and createif to sgsnemu/cmdline.ggo. Now
 	sgsnemu will set up default route and then execute ipup script
 	after tun device has been set up. After tun has been deleted the
 	ipdown script is executed.
 	Added support for ping to sgsnemu.
 	Added ipup and ipdown to ggsn/cmdline.ggo.
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,35 @@
 ## Process this file with automake to produce Makefile.in
-SUBDIRS = lib gtp ggsn sgsnemu doc
+SUBDIRS = \
 	  include \
 	  lib \
 	  gtp \
 	  ggsn \
 	  sgsnemu \
 	  doc \
 	  contrib \
 	  utils \
 	  tests \
 	  $(NULL)
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libgtp.pc
 BUILT_SOURCES = $(top_srcdir)/.version
 $(top_srcdir)/.version:
 	echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
 EXTRA_DIST = \
 	     .version \
 	     README.FreeBSD \
 	     README.MacOSX \
 	     README.md \
 	     debian \
 	     git-version-gen \
 	     $(NULL)
 AM_DISTCHECK_CONFIGURE_FLAGS = \
 	--with-systemdsystemunitdir=$$dc_install_base/$(systemdsystemunitdir)
@RELMAKE@
--- a/78
+++ b/78
@@ -1,78 +0,0 @@
 OPENGGSN NEWS
 =============
 OpenGGSN - Gateway GPRS Support Node
 Copyright (C) 2002, 2003, 2004 Mondru AB.
 Version 0.84
 ============
 * Initial MAC OSX support (Thanks to Pekka Nikander)
 * Quality assurance and improved error logging (Thanks to Pekka
  Nikander and Jonny Winberg)
 Version 0.83
 ============
 * Added selection mode and charging characteristics option to sgsnemu.
 * Bug fixes on charging characteristics and PPP PCO length.(Thanks to
  Loic Bernable	<leto@vilya.org>).
 * Improved Solaris support, hash table bugfix and improved logging.
 Version 0.82
 ============
 * Improved Solaris support. 
 * Routing manipulation and IP address alias capability for FreeBSD.
 * Initial Debian port (Thanks to ARAKI Yasuhiro <ar@debian.org>).
 Version 0.81
 ============
 * Initial FreeBSD port (Thanks to Pavel Andreev <pavel.andreev@hp.com>).
 * IMSI '1111' bugfix (Thanks to Pavel Andreev <pavel.andreev@hp.com>).
 Version 0.8
 ===========
 * Support for compilation under Solaris.
 * Iptables firewall script.
 * New options for sgsnemu
 Version 0.7
 ===========
 * Support for GTP1. Currently without support for the secondary pdp
   context activation procedure.
 * sgsnemu will first attempt to use GTP1. If that fails it will
   fallback to using GTP0.
 * Standards compliance document.
 Version 0.6
 ===========
 * Improved README file.
 * Now uses ioctl instead of ifconfig and route in ggsn and sgsnemu.
 * Absolute path to gtp library in ggsn/Makefile.am and ggsn/Makefile.am
 * Compiles with gengetopt 2.8 (Thanks to Lorenzo Bettini <bettini@gnu.org>)
 * sgsnemu is now able to handle several contexts and allocate
   interface IP addresses for each context.
 * ggsn now supports protocol configuration option DNS
   addresses. This allow mobile stations to set up DNS based on
   information configured in the ggsn.
 * Ping facility in sgsnemu allow testing without the need to route
   packets through the tun interface.
 * Man pages for ggsn and sgsnemu.
 * Sys 5 init script.
 * Spec file for building binary RPM packages.
 * If not --createif exit after "ping" or "echo" finishes
 * If sgsnemu echo failure, exit with code != 0
 Version 0.5
 ===========
 * Initial release. See README file for installation and usage
   instructions.
--- a/430
+++ b/430
@@ -1,430 +0,0 @@
 OPENGGSN README
 ===============
 QuickStart
 ==========
 Requirements
 ------------
 *Linux* 
 OpenGGSN was developed and tested using Redhat 8.0 and 9.0. It should
 run also on other Linux distributions as well as FreeBSD, but this is
 untested. Compilation on Solaris 2.8 has also been verified.
 *Tun*
 The tun driver is required for proper operation of openggsn. For linux
 kernels later than 2.4.7 the driver is typically included, but need
 to be configured for automatic loading:
 1. Add the following line to /etc/modules.conf: alias char-major-10-200 tun 
 2. depmod -a
 Installation from binary
 ------------------------
 rpm -i openggsn-<version>.rpm
 This will install binaries, man pages, configuration files as well as
 a Sys V init script for the ggsn.
 Installation from source
 ------------------------
 1. ./configure
 2. make
 3. make install
 You need to be root in order to install the package, but not in order
 to compile.
 Running
 -------
 *sgsnemu*
 Start the emulator as root using the command:
  sgsnemu -l 10.0.0.50 -r 10.0.0.40 --createif --defaultroute
 This will cause the sgsn emulator to bind to local address 10.0.0.50
 and connect to the ggsn found at 10.0.0.40. It will first send off an
 ECHO_REQUEST message. After this it will attempt to establish a pdp
 context. If successful it will create a local interface and set up
 routing. Now you should be able to ping through the connection. Use a
 network analysator such as ethereal to monitor the traffic.
 sgsnemu -h will show a list of available options. 
 sgsnemu -c sgsnemu.conf will use sgsnemu.conf as a configuration
 file. A sample file is provided in examples/sgsnemu.conf.
 *ggsn*
 Edit the configuration file ggsn.conf found under openggsn/examples.
 Start the ggsn as root using the command:
 ggsn --fg -c examples/ggsn.conf -l 10.0.0.40 --statedir ./
 This will run the ggsn in foreground using the local interface
 10.0.0.40. If you don't have a GSM network available for testing you
 can use sgsnemu to test the GGSN.
 Support
 -------
 If you have any questions drop me a line at jj@openggsn.org.
 Features
 ========
 OpenGGSN is an open source implementation of GPRS Support Nodes
 (GSNs). It implements the GPRS tunneling protocol (GTP) version 0 and
 version 1.
 OpenGGSN provides 3 components:
 * gtplib
 * ggsn
 * sgsnemu
 *gtplib*
 This library contains all functionality relating to the GTP
 protocol. Use this library if you want to implement your own
 GSN. gtplib supports both GTPv0 (GSM 09.60) and GTPv1 (3GPP
 29.060). At the moment no interface documentation is available for
 download.
 *ggsn*
 The ggsn implements a Gateway GPRS Support Node. The GGSN is a small
 application which is provided in order to test and demonstrate the use
 of gtplib. It is fully compliant to the 3GPP standards, but lacks
 important functionality such as charging and management. Use this
 application as a starting point if you want to build your own GGSN
 with your own fancy VPN, management and charging functionality.
 *sgsnemu*
 This application emulates a Serving GPRS Support Node (SGSN). sgsnemu
 enables you to test your 3GPP core network without the need to invest
 in a 3G radio access network. An important application of sgsnemu is
 the testing of roaming connectivity through a GPRS roaming
 exchange. sgsnemu will first attempt to use GTPv1. If unsuccessful it
 will fallback to GTPv0.
 Performance
 ===========
 Two experiments were performed in order to test the performance of
 sgsnemu and ggsn. The ggsn used a 550 MHz Athlon with 384 MB of
 RAM. sgsnemu used a 1 GHz Athlon with 256 MB of RAM. Both machines had
 100 Mb/s NICs (RTL-8139) and were connected through a crossed patch
 cable. Both tests were performed by sending ICMP echo packets from
 sgsnemu to the ggsn.
 89.5 Mb/s IP throughput when sending 10000 ICMP ping packets with a
 payload of 1400 bytes. Transfer time 1.27 sec, no packets lost.
 71.4 Mb/s IP throughput when sending 10000 ICMP ping packets with a
 payload of 1000 bytes. Transfer time 1.15 sec, no packets lost.
 12,1 Mb/s IP throughput when sending 10000 ICMP ping packets with a
 payload of 100 bytes. Transfer time 0.84 sec, no packets lost.
 Required software
 =================
 Tun
 ---
 Both ggsn and sgsnemu uses the tun package. You need at least tun
 version 1.1. With Linux tun is normally included from kernel version
 2.4.7. To configure automatic loading:
 1. Add the following line to /etc/modules.conf: alias char-major-10-200 tun 
 2. depmod -a
 Alternatively you can execute "modprobe tun" on the commandline.
 For Solaris the tun driver needs to be installed manually. For general
 information about tun see http://vtun.sourceforge.net/tun/
 Gengetopt
 ---------
 Gengetopt is required if you want to change the options defined in the
 cmdline.ggo source file. You need at least gengetopt version 2.8. If
 you are just going to compile the programs you don't need gengetopt.
 To use gengetopt for the ggsn do the following:
 cd ggsn
 gengetopt < cmdline.ggo --conf-parser
 To use gengetopt for the sgsnemu do the following:
 cd sgsnemu
 gengetopt < cmdline.ggo --conf-parser
 For more information about gengetopt see
 http://www.gnu.org/software/gengetopt/gengetopt.html
 Compilation and Installation
 ============================
 Setting up autotools
 --------------------
 You do not need to perform this step if you are only going to compile
 the package:
 1. Get version from somewhere: Script to extract version from configure.in
 2. Copy the latest config.guess and config.sub from ftp://ftp.gnu.org/gnu/config
 3. Run autoscan and copy configure.scan to configure.in
 4. Add/edit the following lines in configure.in:
   - AC_INIT(openggsn, 0.70, jj@openggsn.org)
   - AC_CONFIG_SRCDIR([gtp/gtp.c])
   - AM_CONFIG_HEADER([config.h])
   - AC_PROG_LIBTOOL
   - AM_PROG_LIBTOOL
   - AM_INIT_AUTOMAKE()
 5. libtoolize --automake --copy
  (ads copy of ltmain.sh)
 6. aclocal
 7. autoheader
 8. automake --add-missing --copy
  (Ads copy of mkinstalldirs missing, install-sh, depcomp)
 9. automake
 10. autoconf
 The above will initialise the project to the current version of
 autotools (As installed in RedHat 8.0). See
 http://sources.redhat.com/autobook/autobook/autobook_25.html#SEC25 
 for details on autotools.
 Checking out from CVS
 ---------------------
 To download the latest source code from anonymous CVS:
 cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/ggsn login
 cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/ggsn co openggsn
 Or to download from developer CVS:
 export CVS_RSH=ssh
 cvs -z3 -d:ext:developername@cvs.sourceforge.net:/cvsroot/ggsn co openggsn
 Both the above sets of commands creates a new directory called openggsn.
 Compilation and installation
 ----------------------------
 If compiling under Solaris you need to edit the following line in
 ggsn/Makefile.in and sgsnemu/Makefile.in:
 LDFLAGS = -Wl,--rpath -Wl,/usr/local/lib @EXEC_LDFLAGS@
 should be changed to:
 LDFLAGS =  -lresolv -lsocket -lnsl @EXEC_LDFLAGS@ 
 Note that the above is not necessary on other platforms. Compilation
 and installation is performed by the following steps:
 1. ./configure
 2. make clean
 3. cd gtp
 4. make
 5. make install (as root)
 6. cd ..
   (Step 3 to 6 you only need to run the first time to install libgtp)
 7. make
 8. make install (as root)
 9. Add /usr/local/lib to /etc/ld.so.conf
 10. run ldconfig
 (Steps 9 and 10 are not required as path to libgtp is included in Makefile)
 Documentation can be converted to html by issuing:
 1. txt2html -pm -tf README > README.html
 2. txt2html -pm -tf NEWS > NEWS.html
 3. txt2html -pm -tf ChangeLog > ChangeLog.html
 4. man2htm ggsn.8 > ggsn.html
 5. man2htm sgsnemu.8 > sgsnemu.html
 Installation from binary
 ------------------------
 1. rpm -i openggsn-<version>.rpm
 This will install binaries, man pages, configuration files as well as
 a Sys V init script for the ggsn.
 Running ggsn
 ============
 Use ggsn -h for a list of available options. All options available on
 the command line can also be given in a configuration file. See
 examples/ggsn.conf for the format of this file.
 Start the ggsn as root using the command:
 ggsn -c examples/ggsn.conf --fg -l 10.0.0.40 --net 192.168.0.0/24 --dynip 192.168.0.0/24
 First a tun network interface will be created. In the above example
 the network interface address is 192.168.0.0 and the mask is
 255.255.255.0. You can check that this interface is up by using
 ifconfig.
 After tun has been successfully established the ggsn will wait for GTP
 create PDP context requests on the local interface
 10.0.0.40. Currently all requests are accepted, and no password,
 username or APN validation is performed.
 When receiving a create PDP context request a dynamic IP address will
 be allocated from the address pool determined by --dynip. In the above
 example the first allocated address will be 192.168.0.1, followed by
 192.168.0.2 and so on. The request is confirmed by sending a create
 PDP context response message to the peer (SGSN).
 Now IP packets will be forwarded between the tun network interface and
 the established GTP tunnel. In order to allow users to access the
 external network routing needs to be set up. If private addresses are
 used you need to configure network address translation. See the Linux
 Networking HOWTO for details.
 Remember to enable routing: 
 echo 1 > /proc/sys/net/ipv4/ip_forward
 If you installed using a binary RPM package it is possible to start
 ggsn by using the Sys 5 script:
 /etc/init.d/ggsn start
 Running sgsnemu
 ===============
 Use sgsnemu -h for a list of available options. All options available
 on the command line can also be given in a configuration file. See
 examples/sgsnemu.conf for the format of this file.
 If you want to test a GRX roaming connection you will need to do the
 following:
 1. Install sgsnemu on a Linux Box. See under installation above.
 2. Connect your Linux box with sgsnemu installed to the GPRS core
 network. Use the same LAN switch as the one your SGSN is connected
 to. You also need a free IP address that can be used by sgsnemu.
 3. You need to configure networking in terms of interface address,
 subnet mask and default route. See the Linux Networking HOWTO for
 details.
 4. Launch sgsnemu with something like:
 sgsnemu --listen 10.0.0.50 --remote 10.0.0.40 --dns 10.20.38.51 --timelimit 10 --contexts 0 
 sgsnemu will print something like the following on the screen:
 <PRE>
  Using DNS server:      10.20.38.51 (10.20.38.51)
  Local IP address is:   10.0.0.50 (10.0.0.50)
  Remote IP address is:  10.0.0.40 (10.0.0.40)
  IMSI is:               240011234567890 (0x98765432110042)
  Using APN:             internet
  Using MSISDN:          46702123456
  Initialising GTP library
  OpenGGSN[1823]: GTP: gtp_newgsn() started
  Done initialising GTP library
  Sending off echo request
  Waiting for response from ggsn........
  Received echo response. Cause value: 0
 </PRE>
 This is quite good. It means that you managed to send off an echo
 request to a remote GGSN, and it was friendly enough to answer you. If
 you did not get an echo response it means that something is wrong
 either with your setup OR with the GRX connection OR with your roaming
 partners connection.
 If the above went well you might want to try to establish a PDP
 context to the remote GGSN. Note that you should be careful when
 establishing PDP contexts using sgsnemu as each established PDP
 context will result in a Charge Detail Record (CDR) being generated by
 the GGSN. You should use real IMSI and MSISDN from a valid test SIM
 card. Otherwise some poor customer might get charged for your
 testing. Also note that you are establishing a connection to the Gi
 network, so please be carefull not to route internet traffic onto the
 GPRS core network! Assuming you know what you are doing:
 sgsnemu --listen 10.0.0.50 --remote 10.0.0.40 --dns 10.20.38.51 --timelimit 10 --contexts 1 --apn internet --imsi 240011234567890 --msisdn 46702123456 --createif --defaultroute
 sgsnemu will print something like the following on the screen:
 <PRE>
  Using DNS server:      10.20.38.51 (10.20.38.51)
  Local IP address is:   10.0.0.50 (10.0.0.50)
  Remote IP address is:  10.0.0.40 (10.0.0.40)
  IMSI is:               240011234567890 (0x98765432110042)
  Using APN:             internet
  Using MSISDN:          46702123456
  Initialising GTP library
  OpenGGSN[1838]: GTP: gtp_newgsn() started
  Done initialising GTP library
  Sending off echo request
  Setting up PDP context #0
  Waiting for response from ggsn........
  Received echo response. Cause value: 0
  Received create PDP context response. Cause value: 128
  Setting up interface and routing
  /sbin/ifconfig tun0 192.168.0.1
  /sbin/route add -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.0.1
 </PRE>
 Now a context is established to the remote GGSN. The IP address of the
 context is 192.168.0.1. You should be able to ping a known address on
 the Gi network of the roaming partner. You should even be able to do
 web browsing through the PDP context.
 Note however that you probably need to adjust your routing tables, so
 that you make sure that all GRX traffic is routed to the GPRS core
 network and everything else through the PDP context. The proper way to
 do this is to use policy routing. Also note that you are effectively
 connecting the same computer to both the Gn and Gi network, so please
 be carefull not to route internet traffic onto the GPRS core network
 and please protect yourself against hackers! For this reason it is
 advised to always use --contexts 0 when testing a live network.
 After --timelimit seconds the PDP context is disconnected with the
 following messages from sgsnemu:
 <PRE>
  Disconnecting PDP context #0
  Received delete PDP context response. Cause value: 128
  Deleting tun interface
 </PRE>
--- a/README.FreeBSD
+++ b/README.FreeBSD
@@ -1,4 +1,4 @@
-OpenGGSN/FreeBSD notes
+OsmoGGSN/FreeBSD notes
 FreeBSD support is experimental, please test and report bugs. The FreeBSD port is
 tested on FreeBSD 4.x, but may also work on 5.x series.
--- a/README.MacOSX
+++ b/README.MacOSX
@@ -1,4 +1,4 @@
-OpenGGSN/Mac OS X notes
+OsmoGGSN/Mac OS X notes
 Mac OS X support is experimental, please test and report bugs. The
 Mac OS X port is tested on Mac OS X 10.3.5, but may also work on
--- a/README.Solaris
+++ b/README.Solaris
@@ -1,41 +0,0 @@
 OpenGGSN/Solaris notes
 ======================
 Solaris support is experimental, please test and report bugs. The
 Solaris port is tested under Solaris 8.
 Compiling
 ---------
 You need to edit the following line in ggsn/Makefile.in and
 sgsnemu/Makefile.in:
 LDFLAGS = -Wl,--rpath -Wl,/usr/local/lib @EXEC_LDFLAGS@
 should be changed to:
 LDFLAGS =  -lresolv -lsocket -lnsl @EXEC_LDFLAGS@ 
 After this you install by the following commands:
 ./configure
 make
 make install
 TUN
 ---
 You might or might not need to install the tun driver manually. For
 general information about tun see http://vtun.sourceforge.net/tun/
 Known problems
 --------------
 Currently multiple IP addresses on the same network interface is not
 implemented for Solaris.
 Currently routing table manipulation is not implemented for
 Solaris. You have to set the routes manually after you start ggsn or
 sgsnemu.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,341 @@
 OsmoGGSN - Open Source GGSN
 ===========================
 This repository contains a C-language implementation of a GGSN (Gateway
 GPRS Support Node), a core network element of ETSI/3GPP cellular
 networks such as GPRS, EDGE, UMTS or HSPA.
 **OsmoGGSN** is part of the [Osmocom](https://osmocom.org/) Open Source
 Mobile Communications projects and the successor to OpenGGSN (which was
 developed until 2004 by Mondru AB).
 Homepage
 --------
 The official homepage of the project is <https://osmocom.org/projects/openggsn/wiki>.
 GIT Repository
 --------------
 You can clone from the official osmo-ggsn.git repository using
 	git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn
 There is a web interface at <https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn>
 Documentation
 -------------
 The user manual and VTY reference are optionally built in PDF form
 as part of the build process. Pre-rendered versions are available here:
 * [osmo-ggsn user manual](https://ftp.osmocom.org/docs/osmo-ggsn/master/osmoggsn-usermanual.pdf)
 * [osmo-ggsn VTY reference](https://ftp.osmocom.org/docs/osmo-ggsn/master/osmoggsn-vty-reference.pdf)
 Forum
 -----
 We welcome any pySim related discussions in the
 [Cellular Network Infrastructure -> 2G/3G Core Network](https://discourse.osmocom.org/c/cni/2g-3g-cn/)
 section of the osmocom discourse (web based Forum).
 Mailing List
 ------------
 Discussions related to OsmoGGSN are happening on the
 osmocom-net-gprs@lists.osmocom.org mailing list, please see
 <https://lists.osmocom.org/mailman/listinfo/osmocom-net-gprs> for
 subscription options and the list archive.
 Please observe the [Osmocom Mailing List Rules](https://osmocom.org/projects/cellular-infrastructure/wiki/Mailing_List_Rules)
 when posting.
 Issue Tracker
 -------------
 We use the [issue tracker of the osmo-ggsn project on osmocom.org](https://osmocom.org/projects/openggsn/issues) for
 tracking the state of bug reports and feature requests.  Feel free to submit any issues you may find, or help
 us out by resolving existing issues.
 Contributing
 ------------
 Our coding standards are described at
 <https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards>
 We use a Gerrit based patch submission/review process for managing
 contributions.  Please see
 <https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit> for
 more details
 The current patch queue for OsmoGGSN can be seen at
 <https://gerrit.osmocom.org/#/q/project:osmo-ggsn+status:open>
 QuickStart
 ==========
 Requirements
 ------------
 *Linux* 
 OsmoGGSN was originally developed and tested using Redhat 8.0 and 9.0
 and is these days mostly developed on Debian GNU/Linux.  It should run
 also on other Linux distributions as well as FreeBSD, but this is
 untested. Compilation on Solaris 2.8 has also been verified.
 *Tun*
 The tun driver is required for proper operation of openggsn. For Linux
 kernels later than 2.4.7 the driver is typically included, but might
 need to be configured for automatic loading:
 1. Add the following line to `/etc/modules.conf`: `alias char-major-10-200 tun`
 2. `depmod -a`
 Installation from binary
 ------------------------
 OsmoGGSN is built for common versions of Debian, Ubuntu and other distributions part of
 the [Osmocom Nightly Builds](https://osmocom.org/projects/cellular-infrastructure/wiki/Nightly_Builds)
 and [Osmocom Latest Builds](https://osmocom.org/projects/cellular-infrastructure/wiki/Latest_Builds).
 If you don't want to do development, it is suggested to simply use those binary packages, rather than building
 yourself from source.
 Installation from source
 ------------------------
 ```
 ./configure
 make
 make install
 ```
 You need to be root in order to install the package, but not in order
 to compile.
 Support
 -------
 Please contact the Mailing List above for community-based support.
 Features
 ========
 OsmoGGSN is an open source implementation of GPRS Support Nodes
 (GSNs). It implements the GPRS tunneling protocol (GTP) version 0 and
 version 1.
 OsmoGGSN provides 3 components:
 * *libgtp*, a shared library for the GTPv1C protocol
 * *osmo-ggsn*, the GGSN itself
 * *sgsnemu*, a SGSN emulator
 *gtplib*
 This library contains all functionality relating to the GTP
 protocol. Use this library if you want to implement your own
 GSN. gtplib supports both GTPv0 (GSM 09.60) and GTPv1 (3GPP
 29.060). At the moment no interface documentation is available for
 download.
 *osmo-ggsn*
 The osmo-ggsn implements a Gateway GPRS Support Node. The GGSN is a small
 application which is provided in order to test and demonstrate the use
 of gtplib. It is fully compliant to the 3GPP standards, but lacks
 important functionality such as charging and management. Use this
 application as a starting point if you want to build your own GGSN
 with your own fancy VPN, management and charging functionality.
 *sgsnemu*
 This application emulates a Serving GPRS Support Node (SGSN). sgsnemu
 enables you to test your 3GPP core network without the need to invest
 in a 3G radio access network. An important application of sgsnemu is
 the testing of roaming connectivity through a GPRS roaming
 exchange. sgsnemu will first attempt to use GTPv1. If unsuccessful it
 will fallback to GTPv0.
 Required software
 =================
 Tun
 ---
 Both osmo-ggsn and sgsnemu uses the tun package. You need at least tun
 version 1.1. With Linux tun is normally included from kernel version
 2.4.7. To configure automatic loading:
 1. Add the following line to `/etc/modules.conf`: `alias char-major-10-200 tun`
 2. `depmod -a`
 Alternatively you can execute `modprobe tun` on the commandline.
 Gengetopt
 ---------
 Gengetopt is required if you want to change the options defined in the
 cmdline.ggo source file. You need at least gengetopt version 2.8. If
 you are just going to compile the programs you don't need gengetopt.
 To use gengetopt for the sgsnemu do the following:
 ```
 cd sgsnemu
 gengetopt < cmdline.ggo --conf-parser
 ```
 For more information about gengetopt see
 <http://www.gnu.org/software/gengetopt/gengetopt.html>
 Compilation and Installation
 ============================
 Please refer to the project homepage
 Running osmo-ggsn
 =================
 Use osmo-ggsn -h for a list of available options. All options available on
 the command line can also be given in a configuration file. See
 `doc/examples/osmo-ggsn.cfg` for the format of this file.
 Start osmo-ggsn as root using the command:
 `osmo-ggsn -c doc/examples/osmo-ggsn.cfg`
 First, a tun network interface will be created for each configured apn.
 After tun has been successfully established the ggsn will wait for GTP
 create PDP context requests on the configured `gtp bind-ip` address.
 Currently all requests are accepted, and no password, username validation is performed.
 When receiving a create PDP context request for a given APN, a dynamic IP address will
 be allocated from the address pool defined in the config file section for that apn.
 The request is confirmed by sending a create PDP context response message to the peer (SGSN).
 Now IP packets will be forwarded between the tun network interface and
 the established GTP tunnel. In order to allow users to access the
 external network routing needs to be set up. If private addresses are
 used you need to configure network address translation. See the Linux
 Networking HOWTO for details.
 Remember to enable routing:
 `echo 1 > /proc/sys/net/ipv4/ip_forward`
 If you're using systemd and did `make install` or installed from a bianry package,
 you can start osmo-ggsn by using the included systemd service/unit file:
 `systemctl start osmo-ggsn`
 Running sgsnemu
 ===============
 Use `sgsnemu -h` for a list of available options. All options available
 on the command line can also be given in a configuration file. See
 `doc/examples/sgsnemu.conf` for the format of this file.
 If you want to test a GRX roaming connection you will need to do the
 following:
 1. Install sgsnemu on a Linux Box. See under installation above.
 2. Connect your Linux box with sgsnemu installed to the GPRS core
 network. You also need a free IP address that can be used by sgsnemu.
 3. You need to configure networking in terms of interface address,
 subnet mask and default route. See the Linux Networking HOWTO for
 details.
 4. Launch sgsnemu with something like:
 `sgsnemu --listen 10.0.0.50 --remote 10.0.0.40 --dns 10.20.38.51 --timelimit 10 --contexts 0`
 sgsnemu will print something like the following on the screen:
 ```
  Using DNS server:      10.20.38.51 (10.20.38.51)
  Local IP address is:   10.0.0.50 (10.0.0.50)
  Remote IP address is:  10.0.0.40 (10.0.0.40)
  IMSI is:               240011234567890 (0x98765432110042)
  Using APN:             internet
  Using MSISDN:          46702123456
  Initialising GTP library
  OsmoGGSN[1823]: GTP: gtp_newgsn() started
  Done initialising GTP library
  Sending off echo request
  Waiting for response from ggsn........
  Received echo response. Cause value: 0
 ```
 This is quite good. It means that you managed to send off an echo
 request to a remote GGSN, and it was friendly enough to answer you. If
 you did not get an echo response it means that something is wrong
 either with your setup OR with the GRX connection OR with your roaming
 partners connection.
 If the above went well you might want to try to establish a PDP
 context to the remote GGSN. Note that you should be careful when
 establishing PDP contexts using sgsnemu as each established PDP
 context will result in a Charge Detail Record (CDR) being generated by
 the GGSN. You should use real IMSI and MSISDN from a valid test SIM
 card. Otherwise some poor customer might get charged for your
 testing. Also note that you are establishing a connection to the Gi
 network, so please be carefull not to route internet traffic onto the
 GPRS core network! Assuming you know what you are doing:
 `sgsnemu --listen 10.0.0.50 --remote 10.0.0.40 --dns 10.20.38.51 --timelimit 10 --contexts 1 --apn internet --imsi 240011234567890 --msisdn 46702123456 --createif --defaultroute`
 sgsnemu will print something like the following on the screen:
 ```
  Using DNS server:      10.20.38.51 (10.20.38.51)
  Local IP address is:   10.0.0.50 (10.0.0.50)
  Remote IP address is:  10.0.0.40 (10.0.0.40)
  IMSI is:               240011234567890 (0x98765432110042)
  Using APN:             internet
  Using MSISDN:          46702123456
  Initialising GTP library
  OsmoGGSN[1838]: GTP: gtp_newgsn() started
  Done initialising GTP library
  Sending off echo request
  Setting up PDP context #0
  Waiting for response from ggsn........
  Received echo response. Cause value: 0
  Received create PDP context response. Cause value: 128
  Setting up interface and routing
  /sbin/ifconfig tun0 192.168.0.1
  /sbin/route add -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.0.1
 ```
 Now a context is established to the remote GGSN. The IP address of the
 context is 192.168.0.1. You should be able to ping a known address on
 the Gi network of the roaming partner. You should even be able to do
 web browsing through the PDP context.
 Note however that you probably need to adjust your routing tables, so
 that you make sure that all GRX traffic is routed to the GPRS core
 network and everything else through the PDP context. The proper way to
 do this is to use policy routing. Also note that you are effectively
 connecting the same computer to both the Gn and Gi network, so please
 be carefull not to route internet traffic onto the GPRS core network
 and please protect yourself against hackers! For this reason it is
 advised to always use `--contexts 0` when testing a live network.
 After `--timelimit seconds` the PDP context is disconnected with the
 following messages from sgsnemu:
 ```
  Disconnecting PDP context #0
  Received delete PDP context response. Cause value: 128
  Deleting tun interface
 ```
--- a/9
+++ b/9
@@ -0,0 +1,9 @@
 # When cleaning up this file: bump API version in corresponding Makefile.am and rename corresponding debian/lib*.install
 # according to https://osmocom.org/projects/cellular-infrastructure/wiki/Make_a_new_release
 # In short: https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html#Updating-version-info
 # LIBVERSION=c:r:a
 # If the library source code has changed at all since the last update, then increment revision: c:r + 1:a.
 # If any interfaces have been added, removed, or changed since the last update: c + 1:0:a.
 # If any interfaces have been added since the last public release: c:r:a + 1.
 # If any interfaces have been removed or changed since the last public release: c:r:0.
 #library	what			description / commit summary line
--- a/configure.ac
+++ b/configure.ac
@@ -0,0 +1,276 @@
 # Process this file with autoconf to produce a configure script.
 AC_INIT([osmo-ggsn],[m4_esyscmd(./git-version-gen .tarball-version)],[osmocom-net-gprs@lists.osmocom.org])
 AC_CONFIG_SRCDIR([gtp/gtp.c])
 AC_CONFIG_HEADERS([config.h])
 dnl *This* is the root dir, even if an install-sh exists in ../ or ../../
 AC_CONFIG_AUX_DIR([.])
 AC_CONFIG_TESTDIR(tests)
 AC_CANONICAL_HOST
 CFLAGS="$CFLAGS -std=gnu11"
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_AWK
 AC_PROG_CPP
 LT_INIT
 dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang
 AS_CASE(["$LD"],[*clang*],
  [AS_CASE(["${host_os}"],
     [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])])
 dnl check for pkg-config (explained in detail in libosmocore/configure.ac)
 AC_PATH_PROG(PKG_CONFIG_INSTALLED, pkg-config, no)
 if test "x$PKG_CONFIG_INSTALLED" = "xno"; then
        AC_MSG_WARN([You need to install pkg-config])
 fi
 PKG_PROG_PKG_CONFIG([0.20])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_LIBOBJ_DIR([lib])
 AC_ARG_ENABLE(static-exec,
 [  --enable-static-exec  Enable static linking of executables],
 [ EXEC_LDFLAGS="-all-static"])
 AC_SUBST(EXEC_LDFLAGS)
 case "${host}" in
  i*86-*-linux-gnu*)
    EXEC_LDADD="" ;;
  *solaris*)
    EXEC_LDADD="-lresolv -lsocket -lnsl" ;;
 esac
 AC_SUBST(EXEC_LDADD)
 # Checks for libraries.
 # FIXME: Replace `main' with a function in `-le':
 #AC_CHECK_LIB([e], [main])
 # FIXME: Replace `main' with a function in `-lgtp':
 #AC_CHECK_LIB([gtp], [main])
 # FIXME: Replace `main' with a function in `-links':
 #AC_CHECK_LIB([inks], [main])
 dnl include release helper
 RELMAKE='-include osmo-release.mk'
 AC_SUBST([RELMAKE])
 dnl GTP Linux kernel dependencies
 AC_ARG_ENABLE([gtp-linux],
 	AS_HELP_STRING([--enable-gtp-linux], [Build GTP tunneling Linux kernel]),
 	[enable_gtp_linux="$enableval"], [enable_gtp_linux="no"])
 AS_IF([test "x$enable_gtp_linux" = "xyes"], [
 	PKG_CHECK_MODULES([LIBGTPNL], [libgtpnl >= 1.3.0])
 ])
 AM_CONDITIONAL([ENABLE_GTP_KERNEL], [test "$enable_gtp_linux" = "yes"])
 # Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h unistd.h])
 # Check for if header. Some versions of linux/if.h fail without sys/socket.h included beforehand:
 # see https://algorithmicallyrandom.blogspot.com/2012/07/error-on-including-include.html
 AC_CHECK_HEADERS([linux/if.h net/if.h], [], [], [#ifdef HAVE_SYS_SOCKET_H
                                                # include <sys/socket.h>
                                                # endif
                                                ])
 # Check for tun header
 AC_CHECK_HEADERS([linux/if_tun.h net/if_tun.h])
 # Check for netlink and rtnetlink headers
 AC_CHECK_HEADERS([linux/netlink.h linux/rtnetlink.h])
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_TYPE_MODE_T
 AC_TYPE_SIZE_T
 AC_HEADER_TIME
 # check for ifaliasreq
 AC_MSG_CHECKING(whether struct ifaliasreq exist)
 AH_TEMPLATE(HAVE_IFALIASREQ)
 AC_EGREP_HEADER(ifaliasreq, net/if.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IFALIASREQ])],
 AC_MSG_RESULT(no))
 # check for ifreq.ifru_netmask
 AC_MSG_CHECKING(whether struct ifreq.ifru_netmask exist)
 AH_TEMPLATE(HAVE_IFREQ_IFRU_NETMASK)
 AC_EGREP_HEADER(ifru_netmask, linux/if.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IFREQ_IFRU_NETMASK])],
 AC_MSG_RESULT(no))
 # check for rt_msghdr
 AC_MSG_CHECKING(whether struct rt_msghdr exist)
 AH_TEMPLATE(HAVE_RT_MSGHDR)
 AC_EGREP_HEADER(rt_msghdr, net/route.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_RT_MSGHDR])],
 AC_MSG_RESULT(no))
 AC_MSG_CHECKING(whether struct iphdr exists)
 AH_TEMPLATE(HAVE_IPHDR)
 AC_EGREP_HEADER(struct iphdr, netinet/ip.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IPHDR])],
 AC_MSG_RESULT(no))
 # Address generation modes (enum) implemented in linux 3.17 (bc91b0f07ada5535427373a4e2050877bcc12218)
 # /proc/sys/net/ipv6/conf/${iface}/addr_gen_mode was added in linux 4.11 (d35a00b8e33dab7385f724e713ae71c8be0a49f4)
 AC_MSG_CHECKING(whether enum in6_addr_gen_mode.IN6_ADDR_GEN_MODE_NONE exists)
 AH_TEMPLATE(HAVE_IN6_ADDR_GEN_MODE_NONE)
 AC_EGREP_HEADER(IN6_ADDR_GEN_MODE_NONE, linux/if_link.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IN6_ADDR_GEN_MODE_NONE])],
 AC_MSG_RESULT(no))
 # Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 # AC_FUNC_MALLOC
 # AC_FUNC_MEMCMP
 AC_CHECK_FUNCS([gethostbyname inet_ntoa memset select socket strdup strerror strtol])
 AC_CHECK_FUNCS(inet_aton inet_addr, break)
 # check for getopt in standard library
 adl_FUNC_GETOPT_LONG
 AM_INIT_AUTOMAKE([foreign])
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.11.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.11.0)
 PKG_CHECK_MODULES(LIBOSMOCTRL, libosmoctrl >= 1.11.0)
 AC_ARG_ENABLE(sanitize,
 	[AS_HELP_STRING(
 		[--enable-sanitize],
 		[Compile with address sanitizer enabled],
 	)],
 	[sanitize=$enableval], [sanitize="no"])
 if test x"$sanitize" = x"yes"
 then
 	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
 	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
 fi
 AC_ARG_ENABLE(werror,
 	[AS_HELP_STRING(
 		[--enable-werror],
 		[Turn all compiler warnings into errors, with exceptions:
 		 a) deprecation (allow upstream to mark deprecation without breaking builds);
 		 b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
 		]
 	)],
 	[werror=$enableval], [werror="no"])
 if test x"$werror" = x"yes"
 then
 	WERROR_FLAGS="-Werror"
 	WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
 	WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
 	CFLAGS="$CFLAGS $WERROR_FLAGS"
 	CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
 fi
 # Generate manuals
 AC_ARG_ENABLE(manuals,
 	[AS_HELP_STRING(
 		[--enable-manuals],
 		[Generate manual PDFs [default=no]],
 	)],
 	[osmo_ac_build_manuals=$enableval], [osmo_ac_build_manuals="no"])
 AM_CONDITIONAL([BUILD_MANUALS], [test x"$osmo_ac_build_manuals" = x"yes"])
 AC_ARG_VAR(OSMO_GSM_MANUALS_DIR, [path to common osmo-gsm-manuals files, overriding pkg-config and "../osmo-gsm-manuals"
 	fallback])
 if test x"$osmo_ac_build_manuals" = x"yes"
 then
 	# Find OSMO_GSM_MANUALS_DIR (env, pkg-conf, fallback)
 	if test -n "$OSMO_GSM_MANUALS_DIR"; then
 		echo "checking for OSMO_GSM_MANUALS_DIR... $OSMO_GSM_MANUALS_DIR (from env)"
 	else
 		OSMO_GSM_MANUALS_DIR="$($PKG_CONFIG osmo-gsm-manuals --variable=osmogsmmanualsdir 2>/dev/null)"
 		if test -n "$OSMO_GSM_MANUALS_DIR"; then
 			echo "checking for OSMO_GSM_MANUALS_DIR... $OSMO_GSM_MANUALS_DIR (from pkg-conf)"
 		else
 			OSMO_GSM_MANUALS_DIR="../osmo-gsm-manuals"
 			echo "checking for OSMO_GSM_MANUALS_DIR... $OSMO_GSM_MANUALS_DIR (fallback)"
 		fi
 	fi
 	if ! test -d "$OSMO_GSM_MANUALS_DIR"; then
 		AC_MSG_ERROR("OSMO_GSM_MANUALS_DIR does not exist! Install osmo-gsm-manuals or set OSMO_GSM_MANUALS_DIR.")
 	fi
 	# Find and run check-depends
 	CHECK_DEPENDS="$OSMO_GSM_MANUALS_DIR/check-depends.sh"
 	if ! test -x "$CHECK_DEPENDS"; then
 		CHECK_DEPENDS="osmo-gsm-manuals-check-depends"
 	fi
 	if ! $CHECK_DEPENDS; then
 		AC_MSG_ERROR("missing dependencies for --enable-manuals")
 	fi
 	# Put in Makefile with absolute path
 	OSMO_GSM_MANUALS_DIR="$(realpath "$OSMO_GSM_MANUALS_DIR")"
 	AC_SUBST([OSMO_GSM_MANUALS_DIR])
 fi
 # https://www.freedesktop.org/software/systemd/man/daemon.html
 AC_ARG_WITH([systemdsystemunitdir],
     [AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files])],,
     [with_systemdsystemunitdir=auto])
 AS_IF([test "x$with_systemdsystemunitdir" = "xyes" -o "x$with_systemdsystemunitdir" = "xauto"], [
     def_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
     AS_IF([test "x$def_systemdsystemunitdir" = "x"],
   [AS_IF([test "x$with_systemdsystemunitdir" = "xyes"],
    [AC_MSG_ERROR([systemd support requested but pkg-config unable to query systemd package])])
    with_systemdsystemunitdir=no],
   [with_systemdsystemunitdir="$def_systemdsystemunitdir"])])
 AS_IF([test "x$with_systemdsystemunitdir" != "xno"],
      [AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])])
 AM_CONDITIONAL([HAVE_SYSTEMD], [test "x$with_systemdsystemunitdir" != "xno"])
 AC_MSG_RESULT([CFLAGS="$CFLAGS"])
 AC_MSG_RESULT([CPPFLAGS="$CPPFLAGS"])
 AC_CONFIG_FILES([Makefile
                 doc/Makefile
                 doc/examples/Makefile
                 ggsn/Makefile
                 gtp/Makefile
                 lib/Makefile
                 intl/Makefile
                 po/Makefile
                 utils/Makefile
                 sgsnemu/Makefile
                 doc/manuals/Makefile
                 contrib/Makefile
                 contrib/systemd/Makefile
                 tests/Makefile
                 tests/lib/Makefile
                 tests/gtp/Makefile
                 include/Makefile
                 include/osmocom/Makefile
                 include/osmocom/gtp/Makefile
                 libgtp.pc])
 AC_OUTPUT
 echo "
 osmo-ggsn Configuration:
  GTP Linux kernel support:			${enable_gtp_linux}"
--- a/configure.in
+++ b/configure.in
@@ -1,121 +0,0 @@
 # Process this file with autoconf to produce a configure script.
 AC_INIT(openggsn, 0.91, laforge@gnumonks.org)
 AC_CONFIG_SRCDIR([gtp/gtp.c])
 AM_CONFIG_HEADER([config.h])
 #AC_CONFIG_HEADER([config.h])
 AC_CANONICAL_SYSTEM
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_AWK
 AC_PROG_CPP
 AC_PROG_CXX
 LT_INIT
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_LIBOBJ_DIR([lib])
 AC_ARG_ENABLE(static-exec,
 [  --enable-static-exec  Enable static linking of executables],
 [ EXEC_LDFLAGS="-all-static"])
 AC_SUBST(EXEC_LDFLAGS)
 case "${host}" in
  i*86-*-linux-gnu*) 
    EXEC_LDADD="" ;;
  *solaris*) 
    EXEC_LDADD="-lresolv -lsocket -lnsl" ;;
 esac
 AC_SUBST(EXEC_LDADD)
 # Checks for libraries.
 # FIXME: Replace `main' with a function in `-le':
 #AC_CHECK_LIB([e], [main])
 # FIXME: Replace `main' with a function in `-lgtp':
 #AC_CHECK_LIB([gtp], [main])
 # FIXME: Replace `main' with a function in `-links':
 #AC_CHECK_LIB([inks], [main])
 # Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h unistd.h])
 # Check for if header
 AC_CHECK_HEADERS([linux/if.h net/if.h])
 # Check for tun header
 AC_CHECK_HEADERS([linux/if_tun.h net/if_tun.h])
 # Check for netlink and rtnetlink headers
 AC_CHECK_HEADERS([linux/netlink.h linux/rtnetlink.h])
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_TYPE_MODE_T
 AC_TYPE_SIZE_T
 AC_HEADER_TIME
 # check for ifaliasreq
 AC_MSG_CHECKING(whether struct ifaliasreq exist)
 AH_TEMPLATE(HAVE_IFALIASREQ)
 AC_EGREP_HEADER(ifaliasreq, net/if.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IFALIASREQ])],
 AC_MSG_RESULT(no))
 # check for ifreq.ifru_netmask
 AC_MSG_CHECKING(whether struct ifreq.ifru_netmask exist)
 AH_TEMPLATE(HAVE_IFREQ_IFRU_NETMASK)
 AC_EGREP_HEADER(ifru_netmask, linux/if.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_IFREQ_IFRU_NETMASK])],
 AC_MSG_RESULT(no))
 # check for rt_msghdr
 AC_MSG_CHECKING(whether struct rt_msghdr exist)
 AH_TEMPLATE(HAVE_RT_MSGHDR)
 AC_EGREP_HEADER(rt_msghdr, net/route.h,
 [AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_RT_MSGHDR])],
 AC_MSG_RESULT(no))
 # Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 # AC_FUNC_MALLOC
 # AC_FUNC_MEMCMP 
 AC_CHECK_FUNCS([gethostbyname inet_ntoa memset select socket strdup strerror strtol])
 AC_CHECK_FUNCS(inet_aton inet_addr, break)
 # check for getopt in standard library
 adl_FUNC_GETOPT_LONG
 AM_INIT_AUTOMAKE()
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 0.6.4)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 0.3.0)
 AC_CONFIG_FILES([Makefile
                 doc/Makefile
                 ggsn/Makefile
                 gtp/Makefile
                 lib/Makefile
                 intl/Makefile
                 po/Makefile
                 sgsnemu/Makefile
                 tests/Makefile
                 libgtp.pc
                 openggsn.spec])
 AC_OUTPUT
--- a/contrib/Makefile.am
+++ b/contrib/Makefile.am
@@ -0,0 +1 @@
 SUBDIRS = systemd
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -0,0 +1,63 @@
 #!/usr/bin/env bash
 # jenkins build helper script for openbsc.  This is how we build on jenkins.osmocom.org
 #
 # environment variables:
 # * GTP: configure GTP tunneling Linux kernel (values: "--enable-gtp-linux" or "--disable-gtp-linux")
 # * WITH_MANUALS: build manual PDFs if set to "1"
 # * PUBLISH: upload manuals after building if set to "1" (ignored without WITH_MANUALS = "1")
 #
 if ! [ -x "$(command -v osmo-build-dep.sh)" ]; then
 	echo "Error: We need to have scripts/osmo-deps.sh from http://git.osmocom.org/osmo-ci/ in PATH !"
 	exit 2
 fi
 set -ex
 base="$PWD"
 deps="$base/deps"
 inst="$deps/install"
 export deps inst
 osmo-clean-workspace.sh
 mkdir "$deps" || true
 if [ "x$GTP" == "x--enable-gtp-linux" ]; then
 	osmo-build-dep.sh libgtpnl
 fi
 osmo-build-dep.sh libosmocore "" --disable-doxygen
 verify_value_string_arrays_are_terminated.py $(find . -name "*.[hc]")
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 export PATH="$inst/bin:$PATH"
 # Additional configure options and depends
 CONFIG=""
 if [ "$WITH_MANUALS" = "1" ]; then
 	CONFIG="--enable-manuals"
 fi
 set +x
 echo
 echo
 echo
 echo " =============================== OsmoGGSN ==============================="
 echo
 set -x
 cd "$base"
 autoreconf --install --force
 ./configure --enable-sanitize --enable-werror $GTP $CONFIG
 $MAKE $PARALLEL_MAKE
 DISTCHECK_CONFIGURE_FLAGS="$CONFIG" $MAKE $PARALLEL_MAKE distcheck
 if [ "$WITH_MANUALS" = "1" ] && [ "$PUBLISH" = "1" ]; then
 	make -C "$base/doc/manuals" publish
 fi
 $MAKE $PARALLEL_MAKE maintainer-clean
 osmo-clean-workspace.sh
--- a/contrib/openggsn.service
+++ b/contrib/openggsn.service
@@ -1,12 +0,0 @@
 [Unit]
 Description=OpenGGSN
 [Service]
 Type=simple
 Restart=always
 ExecStart=/usr/bin/ggsn -c /etc/ggsn.conf -f
 RestartSec=2
 RestartPreventExitStatus=1
 [Install]
 WantedBy=multi-user.target
--- a/contrib/systemd/Makefile.am
+++ b/contrib/systemd/Makefile.am
@@ -0,0 +1,10 @@
 EXTRA_DIST = \
 	osmo-ggsn.service \
 	ggsn.network \
 	apn0.netdev \
 	$(NULL)
 if HAVE_SYSTEMD
 systemdsystemunit_DATA = \
  osmo-ggsn.service
 endif
--- a/contrib/systemd/apn0.netdev
+++ b/contrib/systemd/apn0.netdev
@@ -0,0 +1,7 @@
 [NetDev]
 Name=apn0
 Kind=tun
 [Tun]
 User=username
 Group=username
--- a/contrib/systemd/ggsn.network
+++ b/contrib/systemd/ggsn.network
@@ -0,0 +1,6 @@
 [Match]
 Name=apn0
 [Network]
 Address=192.168.7.1/24
 IPMasquerade=yes
--- a/contrib/systemd/osmo-ggsn.service
+++ b/contrib/systemd/osmo-ggsn.service
@@ -0,0 +1,20 @@
 [Unit]
 Description=OsmoGGSN
 After=network-online.target
 Wants=network-online.target
 [Service]
 Type=simple
 Restart=always
 StateDirectory=osmocom
 WorkingDirectory=%S/osmocom
 ExecStart=/usr/bin/osmo-ggsn -c /etc/osmocom/osmo-ggsn.cfg
 RestartSec=2
 RestartPreventExitStatus=1
 User=osmocom
 Group=osmocom
 # For setting up the gtp0/tun0 devices
 AmbientCapabilities=CAP_NET_ADMIN
 [Install]
 WantedBy=multi-user.target
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,633 @@
-openggsn (0.91+git34) UNRELEASED; urgency=medium
+osmo-ggsn (1.13.0) unstable; urgency=medium
  [ Pau Espin Pedrol ]
  * gtp: Allow tx Direct Tunnel Flags in UpdatePDPCtx{Req,Resp}
  * gtp: Store rx Direct Tunnel Flags in UpdatePDPCtx{Req,Resp}
  * gtp: Allow UpdatePDPContext initiated by GGSN
  * gtp: Allow setting callback to receive update_context_ind
  * ggsn: Mark internal cb function static
  * ggsn: kernel gtpu: Support updating pdp ctx remote IP address and TEID
  * Move apn allocation code out of vty file
  * Move ggsn allocation code out of vty file
  * Move g_ggsn_list declaration to ggsn.c
  * vty: Fix missing newline in description of 'apn tun-device' cmd
  * ggsn: Support announcing APN MTU over PCO
  * ggsn: Support announcing APN MTU over ICMPv6 RA
  * ggsn: use libosmocore tundev API to create apn tun device
  * ggsn: Use osmo_netdev_addaddr() libosmocore API
  * ggsn: apply configured APN MTU to tun
  * doc: Fix typo in user manual
  * doc: Remove reference to non longer existing osmo-ggsn.init
  * doc: Fix typo: wrong interface named
  * doc: Reorder some chapters
  * tun: Fix null pointer derefence when in kernel gtp mode
  * ggsn: Avoid forwarding IPv6 solicited-node multicast addr to tun device
  * ggsn: Rename confusing functions
  * tun.h: Remove non-existent tun_decaps()
  * Rename tun_encaps -> tun_inject_pkt
  * Refactor tun_t fields and alloc APIs
  * tun: Use OSMO_STRLCPY_ARRAY
  * doc: Document MTU features in User Manual and example config files
  * doc: Update all iptables references with nftables
  * jenkins.sh: Use --disable-doxygen configure param
  [ Alexander Couzens ]
  * gtp_internal.h: add missing include to <stdint.h>
  * gtpie: fix comment
  * gtp.h: add more GTP cause code from 29.060 v15.3.30
  * gtp_new(): use talloc instead of calloc/free
  * gtpie: add gtp_encaps a modern encapsulation method
  * gtp: split gtp_req into 2 parts: transmit and fill header
  [ Daniel Willmann ]
  * gtp: Make peer addr const in gtp_req/gtp_resp
  * gtp: Rework gtp_resp() into gtp_resp_pdp()
 -- Oliver Smith <osmith@sysmocom.de>  Wed, 12 Feb 2025 12:09:58 +0100
 osmo-ggsn (1.12.0) unstable; urgency=medium
  [ Daniel Willmann ]
  * libgtp: Remove defines for reserved causes in gtp.h
  [ Pau Espin Pedrol ]
  * pco: Improve IPCP spec reference documentation
  [ Oliver Smith ]
  * Fix a typo
  * gtp_new: deduplicate create_and_bind_socket code
  * kernel-gtp: support IPv6 on outer layer
  * kernel-gtp: support IPv6 on inner layer
  * Revert "kernel-gtp: support IPv6 on outer layer"
  * Cosmetic: Makefile.am: make SUBDIRS diff friendly
  * Cosmetic: AM_CFLAGS: make diff friendly
  * Cosmetic: {lib,gtp}/Makefile.am: diff friendly
  * lib/gtp-kernel.c: initialize ret with 0
  * lib/gtp-kernel.c: check rc of in46a_from_eua
  * doc: fix typo ndoe -> node
  * Add clear error for kernel not supporting IPv6
  * contrib: remove rpm spec file
  * libgtp: move includes to osmocom/include/gtp
  * gtp/gsn_internal.h: new file
  * gtp/gtp.c: move gtp_create_context_resp down
  * gtp: remove unused conversion functions
  * gtp: move conversion functions up
  * gtp/gtp_internal.h: new file
  * ggsn/ggsn_vty: create state-dir
  * doc: set state-dir to /var/lib/osmocom/osmo-ggsn
  * contrib/systemd: run as osmocom user
  * Use uniform log format for default config files
  * {contrib,debian}/osmo-ggsn.init: remove
  [ Harald Welte ]
  * Add funding link to github mirror
  * README.md: Improve markdown formatting
  * README.md: Add Forum + Issue Tracker sections
  * README.md: Major overhaul
  [ Vadim Yanitskiy ]
  * README.md: cosmetic: fix a typo
 -- Oliver Smith <osmith@sysmocom.de>  Wed, 24 Jul 2024 15:13:31 +0200
 osmo-ggsn (1.11.0) unstable; urgency=medium
  [ Daniel Willmann ]
  * gtp: Add net GTP cause values and a function to check for success
 -- Oliver Smith <osmith@sysmocom.de>  Tue, 28 Nov 2023 13:38:29 +0100
 osmo-ggsn (1.10.2) unstable; urgency=medium
  [ Vadim Yanitskiy ]
  * Do not hard-code -g and -O2 in CFLAGS
  * tests: use -no-install libtool flag to avoid ./lt-* scripts
  [ Oliver Smith ]
  * doc/manuals/chapters/configuration: fix typo
  * debian: set compat level to 10
  * systemd: depend on networking-online.target
  * README: update documentation section
  * doc: running: update kernel-gtp limitations
  * lib/in46_addr: add in46a_from_gsna
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 12 Sep 2023 14:36:10 +0200
 osmo-ggsn (1.10.1) unstable; urgency=medium
  [ Oliver Smith ]
  * debian/libgtp6.shlibs: new file
  [ Vadim Yanitskiy ]
  * lib/icmpv6.h: fix struct icmpv6_{radv_hdr,opt_prefix}
  * gtp/gsn.c: fix 'No newline at end of file'
  * gtp: use OSMO_ASSERT() in gtp_new()
 -- Vadim Yanitskiy <vyanitskiy@sysmocom.de>  Mon, 27 Feb 2023 22:35:47 +0700
 osmo-ggsn (1.10.0) unstable; urgency=medium
  [ Max ]
  * Set working directory in systemd service file
  * Ignore .deb build byproducts
  * ctrl: take both address and port from vty config
  [ Pau Espin Pedrol ]
  * cosmetic: gtp: Fix typo in comment
  * Split gsn_t related APIs out of gtp.{c,h}
  * Use rate_ctr for gsn_t available_counters
  * ggsn: Introduce tdef and make it configurable over VTY
  * gtp: Introduce VTY configurable GTP timer X3
  * Fix typos in comments and VTY descriptions
  [ arehbein ]
  * osmo-ggsn: Transition to use of 'telnet_init_default'
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 07 Feb 2023 14:29:48 +0100
 osmo-ggsn (1.9.0) unstable; urgency=medium
  [ Pau Espin Pedrol ]
  * tests: in46a_test: Make coverity happy when calling in46a_from_eua
  * vty: Fix cmd 'no echo-interval' doing nothing
  * libgtp: Fix ggsn crash if pdp alloc array is full (PDP_MAX)
  * libgtp: Define retransmit QUEUE_SIZE relative to PDP_MAX (increase)
  * gtp: Use switch statement in gtp_create_pdp_ind()
  * gtp: Log detection of rx duplicate
  * gtp: Small log improvements in gtp_create_pdp_ind()
  * gtp: Specify retrans queue name & seqnum in log lines
  * gtp: Log retrans queue register&free entries
  * gtp: Fix typo in comment
  * pco.h: Fix typo in reference to spec
  [ Vadim Yanitskiy ]
  * tests: use 'check_PROGRAMS' instead of 'noinst_PROGRAMS'
  [ Harald Welte ]
  * update git URLs (git -> https; gitea)
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 28 Jun 2022 17:48:22 +0200
 osmo-ggsn (1.8.0) unstable; urgency=medium
  [ Oliver Smith ]
  * doc/examples/Makefile.am: add sgsnemu.conf
  * doc/examples/osmo-ggsn-kernel-gtp.cfg: new file
  * doc/manuals: describe GTP-U kernel module
  * gitignore: add ggsn_vty_reference.xml
  [ Harald Welte ]
  * Don't install osmo-ggsn-kernel-gtp.cfg to /etc/osmocom/
  * Don't install sgsnemu.conf to /etc/osmocom/
  * ggsn: Reject PDP CTX ACT for static IP addresses
  * vty: Inform user that static IP addresses are not supported
  [ Pau Espin Pedrol ]
  * gtp: Update teic_confirmed only on resp success
  * gtp: Rework parsing logic of UpdatePdpCtxResponse
  * ggsn: Improve logging on incoming DL data packets
  * gtp: Improve logging of failing pdp ctx resolution from TEI/TID
  * cosmetic: gtpie.c: Fix trailing whitespace
  * gtp: constify pointer arg
  * gtp: Support tx/rx RAN Information Relay message
  * ggsn: Log tun fd write errors
  * ggsn: Fix heap-use-after-free during Recovery without associated PDP
  * cosmetic: configure.ac: Fix tabulation in line
  * Introduce program gtp-echo-responder
  * gtp_echo_responder: report invalid chars present in node-feautres cmdline arg as error
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 16 Nov 2021 13:49:16 +0100
 osmo-ggsn (1.7.1) unstable; urgency=medium
  [ Harald Welte ]
  * main: add --vty-ref-mode, use vty_dump_xml_ref_mode()
  * manuals: generate vty reference xml at build time
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 23 Feb 2021 17:31:24 +0100
 osmo-ggsn (1.7.0) unstable; urgency=medium
  [ Vadim Yanitskiy ]
  * debian/control: change maintainer to the Osmocom team / mailing list
  [ Pau Espin Pedrol ]
  * configure.ac: Fix trailing whitespace
  * doc: Update VTY reference xml file
  * Support setting rt-prio and cpu-affinity mask through VTY
  * contrib/jenkins: Enable parallel make in make distcheck
  * ggsn: generate coredump and exit upon SIGABRT received
  * tests: Explicitly drop category from log
  * tests: Replace deprecated API log_set_print_filename
  [ Keith ]
  * Fix vty PDP lookups by IMSI
  * Prevent Crash in show pdp-context from vty
  * Minor: remove code duplication
  * Use imsi_str2gtp() in sgsnemu
  * sgsnemu: relax check on length of IMSI cmdline arg.
  * GTP: Replace recently introduced imsi_str2gtp()
  [ Harald Welte ]
  * Use OSMO_FD_* instead of deprecated BSC_FD_*
  * gtp-kernel: Remove duplicate #include section
  * gtp-kernel: don't #include libmnl headers
  [ Oliver Smith ]
  * contrib/jenkins: don't build osmo-gsm-manuals
  * configure.ac: set -std=gnu11
  * apn_start: avoid segfault if missing tun-device
  * .gitignore: ignore debian/libgtp*
  * deb/rpm: build with --enable-gtp-linux
 -- Pau Espin Pedrol <pespin@espeweb.net>  Tue, 23 Feb 2021 13:34:39 +0100
 osmo-ggsn (1.6.0) unstable; urgency=medium
  [ Pau Espin Pedrol ]
  * cosmetic: Fix comment typo
  * netns: Improve error checking
  * sgsnemu: cmdline: Drop unused function cmdline_parser_params_create()
  * sgsnemu: Pass array of in64_addr to in46a_from_eua()
  * sgsnemu: Rename sgsnemu's libgtp cb_conf
  * sgsnemu: Set its default loglevel category to INFO
  * Move icmpv6 and checksum files from ggsn/ dir to lib/
  * netdev_addaddr6: Use prefixlen arg
  * sgsnemu: Avoid adding extra autogenerated local link ipv6 addr to tun iface
  * sgsnemu: Fix ping transmitted statistics output
  * cosmetic: icmpv6.c: fix typo in comment
  * icmpv6.c: Mark internal function as static
  * sgsnemu: Get rid of duplicated options.destaddr
  * sgsnemu: Get rid of duplicated options.net
  * sgsnemu: tun_addaddr: Don't set local addr as dstaddr
  * icmpv6.c: Move code generating ipv6 hdr to its own function
  * Rename netdev_*route to end in route4
  * sgsnemu: Fix build/run against linux < 4.11 (no sysctl addr_gen_mode support)
  * sgsnemu: Handle IPv6 SLAAC in tun iface manually
  * sgsnemu: Implement ping on IPv6 APNs
  * sgsnemu: Fix assumption ipv6 Interface-Identifier of public addr == announced Prefix
  * gtp: queue_test: Fix printf gcc warn under ARM
  [ Andreas Schultz ]
  * add Linux network namespace support for TUN device
  [ Vadim Yanitskiy ]
  * lib/netns: fix open_ns(): return fd from open()
  [ Philipp Maier ]
  * doc: do not use random ip address for dns in default conf
  * doc: use 127.0.0.2 instead of 127.0.0.6 as bind ip.
  * debug: use LOGL_NOTICE instead of LOGL_DEBUG
  [ Eric ]
  * configure.ac: fix libtool issue  with clang and sanitizer
  [ Harald Welte ]
  * lib/netns.c: Add comments to the code, including doxygen API docs
  * lib/netns: OSMO_ASSERT() if user doesn't call init_netns()
  * lib/netns: Fix up error paths
  * example config: use RFC1918 addresses for GGSN pools
  [ Dmitri Kalashnik ]
  * sgsnemu: use real tun device name after the device is up.
  [ Oliver Smith ]
  * osmo-ggsn.spec.in: remove
  * contrib: import RPM spec
  * contrib: integrate RPM spec
  * Makefile.am: EXTRA_DIST: debian, contrib/*.spec.in
 -- Harald Welte <laforge@osmocom.org>  Thu, 13 Aug 2020 12:26:20 +0200
 osmo-ggsn (1.5.0) unstable; urgency=medium
  [ Jan Engelhardt ]
  * build: switch AC_CANONICAL_TARGET for AC_CANONICAL_HOST
  [ Pau Espin Pedrol ]
  * libgtp: Remove packets in tx queue belonging pdp being freed
  * libgtp: announce pdp ctx deletion upon CreatePdpCtx being rejected
  * Introduce in46a_is_v{4,6}() helpers
  * ggsn: Move PCO handling code into its own file
  * in46_addr: Improve in46a_ntop documentation
  * ggsn_vty.c: Fix wrong use of in46a_from_eua, print IPv6 euas
  * ggsn: Split application lifecycle related code into ggsn_main.c
  * Move pdp_get_peer_ipv() to lib/util.*
  * gtp-kernel.c: Fix wrong use of in46a_from_eua, print IPv6 euas
  * Introduce LOGTUN log helper
  * ggsn_vty.c: Avoid printing duplicates for pdp context with v4v6 EUAs
  * pdp: constify param in pdp_count_secondary()
  * ggsn_vty.c: Improve output of VTY show pdp-context
  * doc: Update vty reference xml file
  * libgtp: Introduce cb_recovery3
  * ggsn: Implement echo req/resp and recovery
  * cosmetic: fix formatting in if line
  * gtp: Log msg retransmits and timeouts
  * cosmetic: gtp: Drop commented out code calling pdp_freepdp()
  * cosmetic: gtp: Improve documentation of gtp_delete_context_req2()
  * ggsn: rx DeletePdpReq confirmation: Improve documentation and use gtp_freepdp()
  * gtp: Manage queue timers internally
  * ggsn, sgsnemu: Drop use of no-op deprecated gtp_retrans* APIs
  [ Vadim Yanitskiy ]
  * gtp_update_pdp_ind(): fix NULL-pointer dereference
  * gtp_error_ind_conf(): fix: guard against an unknown GTP version
  * gtp/gtp.c: cosmetic: use get_tid() where we need TID
  * manuals/configuration.adoc: fix Network Address without prefix length
  * manuals/configuration.adoc: fix IPv4 address mismatch in <<ggsn_no_root>>
  * contrib/systemd: add systemd-networkd examples from manuals
  [ Harald Welte ]
  * sgsnemu: Fix null-pointer format string argument
  * manual: Fix copy+paste error
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Thu, 02 Jan 2020 20:39:39 +0100
 osmo-ggsn (1.4.0) unstable; urgency=medium
  [ Max ]
  * Don't return error on normal shutdown
  [ Harald Welte ]
  * process_pco() const-ify 'apn' argument
  * ggsn: Remove magic numbers from pco_contains_proto()
  * ggsn: const-ify input / read-only arguments of PCO related functions
  * ggsn: Remove magic numbers from ipcp_contains_option()
  * ggsn: Fix build_ipcp_pco() in presence of invalid IPCP content
  * ggsn.c: Refactor PCO processing during PDP activation
  * ggsn: Add minimalistic PAP support
  * ggsn: More logging from PCO handling (e.g. in case of malconfiguration)
  * sgsnemu: Fix format string argument count
  [ Vadim Yanitskiy ]
  * osmo-ggsn: fix VTY command for getting PDP contexts by APN
  * osmo-ggsn: add VTY command to show PDP context by IPv4
  * osmo-ggsn: check result of osmo_apn_to_str()
  * osmo-ggsn: print requested / actual APN in PDP info
  * osmo-ggsn: properly show subscriber's MSISDN in the VTY
  [ Pau Espin Pedrol ]
  * ggsn: Drop unused param force in apn_stop()
  * gtp: Document spec reasoning drop of Rx DeleteCtxReq
  * ggsn: Start gtp retrans timer during startup
  * gtp: Take queue_resp into account to schedule retrans timer
  * gtp: Fix typo dublicate->duplicate
  * pdp: Introduce new API pdp_count_secondary
  * gtp_create_pdp_ind: simplify code by reordering and compacting parsing
  * gtp: Refactor code to use gtp_freepdp(_teardown) APIs
  * cosmetic: gtp: Document free pdp ctx in non-teardown scenario
  * gtp: Re-arrange free pdp ctx code in non-teardown scenario
  * pdp: Drop unused code for haship
  * cosmetic: gtp.h: Remove trailing whitespaces
  * ggsn: Fix undefined behaviour shifting beyond sign bit
  * gtp: Introduce new pdp APIs (and deprecate old ones) to support multiple GSN
  * gtp: Make use of new libgtp APIs with multi-gsn support
  * ggsn_vty_reference.xml: Update from last code changes
  * ggsn: vty: Require ggsn param in <show pdp-context> cmd
  * sgsnemu: Replace use of deprecated libgtp API pdp_newpdp with new one
  * cosmetic: gtp: queue: remove trailing whitespace
  * gtp: Add missing headers
  * gtp: queue.c: Document queue APIs
  * gtp: queue: Add unit test queue_test
  * ggsn: Avoid unaligned mem access reading PCO proto id
  * ggsn: Use structures instead of raw arrays when parsing ipcp_hdr
  * configure.ac: Replace obosolete macro AC_CANONICAL_SYSTEM
  * configure.ac: Use brackets in AC_INIT params
  * configure.ac: Use prefered AC_CONFIG_HEADERS over AM_CONFIG_HEADER
  * configure.ac: some versions of linux/if.h require including sys/socket.h
  * sgsnemu: Fix unaligned pointer access during ip/icmp checksum
  * Remove undefined param passed to {logging,osmo_stats}_vty_add_cmds
  * Require libosmocore 1.1.0
  [ Oliver Smith ]
  * debian: create -doc subpackage with pdf manuals
  * ggsn: Use gtp_delete_context_req2() everywhere
  * contrib/jenkins.sh: run "make maintainer-clean"
  [ Daniel Willmann ]
  * manuals: Add script to regenerate vty/counter documentation
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Wed, 07 Aug 2019 21:28:30 +0200
 osmo-ggsn (1.3.0) unstable; urgency=medium
  [ Pau Espin Pedrol ]
  * ggsn: ctrl iface: listen on IP configured by VTY
  * gtp: Log type name of unexpected signalling message
  * gtp: Allow recv DEL CTX REQ in sgsn and DEL CTX RSP in ggsn
  * gtp: Log ignore CTX DEL REQ due to no teardown and only 1 ctx active
  * gtp: Add new API to avoid freeing pdp contexts during DEL CTX REQ
  * gtp: Add new replacement cb_recovery2 for cb_recovery
  * Install systemd services with autotools
  * Install sample cfg file to /etc/osmocom
  [ Stefan Sperling ]
  * fix unaligned access in build_ipcp_pco()
  * fix support for multiple IPCP in PDP protocol configuration options
  * check ioctl() call return value in tun_new()
  * fix allocation of ippool's hash table
  * replace bogus memcpy() call in ippool_newip()
  * initialize local variable addr in ippool_new()
  * fix format string error in ippool_printaddr()
  * fix a format string directives in queue_seqset()
  * properly store IPv6 addresses in struct tun_t
  [ Harald Welte ]
  * debian/rules: Don't overwrite .tarball-version
  * osmo-ggsn.cfg: Ensure well-formed config file example
  * sgsnemu: Fix printing of tun device name
  * ippool.c: Use "%td" format string for ptrdiff_t
  * initial version of OsmoGGSN user manual
  * OsmoGGSN: Add VTY reference manual
  * GGSN: Document how 'ip tuntap' is used for non-root; call netdev 'apn0'
  * vty-ref: Update URI of docbook 5.0 schema
  [ Alexander Couzens ]
  * libgtp: implement gtp_clear_queues to clear req/resp queue
  [ Neels Hofmeyr ]
  * Importing history from osmo-gsm-manuals.git
  * refactor Makefile build rules, don't use the FORCE
  * GGSN: don't say 'NITB'
  * OsmoGGSN: more info on non-root operation / tun creation
  * OsmoGGSN: multiple instances: mention GTP port
  * OsmoGGSN: add Routing section for IP forward and masquerading
  * OsmoGGSN: typo: priveleges
  * OsmoGGSN VTY ref: prep: convert newlines to unix
  * OsmoGGSN vty: update VTY reference
  * OsmoGGSN: fix VTY additions' node IDs
  * OsmoGGSN: update vty reference
  * ggsn: update vty reference
  [ Max ]
  * Expand OsmoGGSN manual
  [ Oliver Smith ]
  * build manuals moved here from osmo-gsm-manuals.git
  * Fix DISTCHECK_CONFIGURE_FLAGS override
  * contrib/jenkins.sh: build and publish manuals
  * contrib: fix makedistcheck with disabled systemd
 -- Harald Welte <laforge@gnumonks.org>  Sun, 20 Jan 2019 21:34:22 +0100
 osmo-ggsn (1.2.2) unstable; urgency=medium
  [ Vadim Yanitskiy ]
  * ggsn_vty.c: fix: use CONFIG_NODE as parent by default
  [ Philipp Maier ]
  * ggsn: fix misinterpreted length field in ipcp_contains_option()
  * ggsn: make sure ipcp_option_hdr and and ipcp_hdr are packed
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Thu, 31 May 2018 12:44:54 +0200
 osmo-ggsn (1.2.1) unstable; urgency=medium
  * debian/rules: Fix debian packaging after 1.2.0 release
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Fri, 04 May 2018 12:19:58 +0200
 osmo-ggsn (1.2.0) unstable; urgency=medium
  [ Neels Hofmeyr ]
  * fix compiler warnings: return 0 in main(), in 3 tests
  * add --enable-sanitize config option
  * sanitize build: ensure uint16/32 alignment in gtpie_test and in46a_test
  * configure: add --enable-werror
  * jenkins.sh: use --enable-werror configure flag, not CFLAGS
  [ Harald Welte ]
  * sgsnemu: Don't leak FILE handle in proc_read()
  * sgsnemu: Fix format string in printing tun-device name
  * sgsnemu: Make sure buffer has space for terminating-NUL
  * sgsnemu: Free strings in error path
  * gtp: Fix buffer overflow in imsi_gtp2str()
  * gtp: Explicit OSMO_ASSERT to ensure pdp variable is set
  * tun: Don't copy 16byte IPv6 address to 'struct in_addr'
  * ippool: Correctly compute size of static pool
  * remove unused argument to alloc_ippool_blacklist()
  * factor out netdev_ip_local_get() from tun_ip_local_get()
  * Properly NULL-out blacklist in alloc_ippool_blacklist()
  * gtp_kernel: Change gtp_kernel_init() function signature
  * gtp-kernel: Re-add support for kernel GTP-U acceleration
  * gtp-kernel: Get rid of hard-coded kernel GTP device name
  * gtp-kernel: shut down kernel GTP device in apn_down()
  * gtp-kernel: Align logging for APN start in kernel-gtp case with that of TUN
  * gtp-kernel: Avoid global state variable
  * gtp-kernel: Make sure repeated calls to gtp_kernel_init() are safe
  * gtp-kernel: proper cleanup in error path
  * gtp-kernel: Get rid of SYS_ERR where not applicable
  * gtp-kernel: Add function name to pdp_debug() function calls
  * gtp-kernel: Add device nime in pdp_debug() log statements
  * contrib/jenkins.sh: Allow jenkins job to specify if kernel GTP is used
  * ggsn.c: Fix byte order of IPCP IPv4 DNS servers
  * ggsn: Ignore PCO with length 0, don't abort processing
  * README.md: Remove misleading sentence on sgsnemu
  * Add talloc context introspection via VTY
  * fix segfault in case of kernel gtp-u
  * lib/tun.c: Generalize tun_sifflags() to netdev_sifflags
  * lib/tun.c: generalize tun_*route() to netdev_*route()
  * lib/tun.c: Generalize tun_{set,add}addr*() functions
  * lib/tun: split generic network device related stuff to lib/netdev
  * lib/netdev.c: Cosmetic changes (coding style / cleanups)
  * ggsn: Don't explicitly use tun_setaddr() API anymore
  * sgsnemu: Convert from tun_setaddr() to tun_addaddr()
  * lib/tun: Remove tun_setaddr() API, as everyone is using tun_addaddr() now
  * Move kernel GTP support from ggsn/ to lib/
  * ggsn: don't use gtp_kernel_tunnel_{add,del}() for userspace tun
  [ Pau Espin Pedrol ]
  * ggsn_vty: Stop using deprecated API vty_install_default
  * contrib/jenkins.sh: Enable Werror in C(PP)FLAGS
  * examples: Add secondary ipv6 google DNS to osmo-ggsn.cfg
  * tun_setaddr6: Fix log typo
  * cosmetic: Reorder tun_addaddr to get rid of decl of tun_setaddr4
  * ggsn.c: Print version of unhandled ip packet
  * Remove unused empty src/Makefile.in
  * tests: Split ipv6 specific tests into a new test group
  * Add support for IPv4v6 End User Addresses
  * contrib: jenkins.sh: Build libgtpnl as dep when building with gtp kernel support
  * cosmetic: sgsnemu.c: Fix trailing whitespace
  * ggsn.c: Improve logging info on link-local ipv6 addr not found
  * tun.c: tun_addaddr: Fix segfault and wrong usage of tun_nlattr
  * Set tun_addaddr ipv agnostic and add support for ipv6
  * ggsn: Add 'ipv6 link-local' vty cmd
  * ggsn_vty.c: Print ipv6 link-local cmd when writing config to file
  * gtp.c: Fix trailing whitespace
  * gtp.c: Determine GTP version from header
  * gtp.c: Log unsupported GTP version number
  * gtp/pdp: Fix trailing whitespace
  * gtp/pdp: Remove unused APIs pdp_ntoeua pdp_euaton
  * gtp.c: gtp_gpdu_ind: Convert ifelse to switch statement
  * gtp.c: gtp_gpdu_ind: Early return to avoid use of uninitialized var
  * gtp/gtp.c: Remove unused function char2ul_t
  * gtp/gtp.c: Mark non exported functions as static
  * gtp/gtp.c: Use uint8_t for version param in static functions
  * ggsn: encaps_tun: Avoid forwarding packet if EUA is unassigned, fix crash
  * ggsn: Validate packet src addr from MS
  * ggsn: Parse PCO_IPCP
  * ggsn: Parse PCO_IPCP for IPv4v6 pdp ctx
  * ggsn: Print all addresses on successful pdp ctx creation
  * ggsn.c: cb_tun_ind: Convert ifelse to switch statement
  * ggsn.c: cb_tun_ind: log dst addr of packet without pdp ctx
  * ggsn.c: cb_tun_ind: Don't drop packets targeting pdp ctx ll addr
  * sgsnemu: Fix bad ptr during context deallocation
  * sgsnemu: listen param is a host, not an interface
  * use osmo_init_logging2
  [ Max ]
  * Log APN and tun names for packets
  * Enable sanitize for CI tests
  * Fix stow-enabled jenkins build failure
  * Add GTP message names
  [ Viktor Tsymbalyuk ]
  * sgsnemu: sgsnemu stopped after recieving "Request accepted" from ggsn
  * sgsnemu: created "pinghost" and "createif" modes for mutual exclusion
  * sgsnemu: fix: no outgoing GTP-U in "createif" mode
  [ Martin Hauke ]
  * build: Remove AC_PROG_CXX, C++ is never used
  [ Stefan Sperling ]
  * remove the -f option from osmo-ggsn.service
 -- Pau Espin Pedrol <pespin@sysmocom.de>  Thu, 03 May 2018 16:05:27 +0200
 osmo-ggsn (1.1.0) unstable; urgency=medium
  * libgtp: pdp.h: Addition of new tx_gpdu_seq struct member member
  * libgtp: pdp.h: add LOGPDPX() helper to public API
 -- Harald Welte <laforge@gnumonks.org>  Sat, 28 Oct 2017 19:00:23 +0200
 osmo-ggsn (1.0.0) unstable; urgency=medium
  * Transition to OsmoGGSN
 -- Harald Welte <laforge@gnumonks.org>  Wed, 06 Sep 2017 12:19:48 +0200
 openggsn (0.94.0) UNRELEASED; urgency=medium
  [ Holger Hans Peter Freyther ]
  * Bump version to ease upgrading from Debian SID.
  * Bump libgtp SO version after ABI change.
  [ Harald Welte ]
  * various documentation / README updates
  * improve error logging and propagation
  * endian-safe definition of IP header
  * IPv6 user plane support
 -- Harald Welte <laforge@gnumonks.org>  Sun, 13 Aug 2017 09:34:20 +0200
 openggsn (0.92) precise; urgency=medium
  * Release 0.92
 -- Holger Hans Peter Freyther <holger@moiji-mobile.com>  Mon, 30 Nov 2015 14:05:59 +0100
 openggsn (0.91+git34) precise; urgency=medium
  * Non-maintainer upload.
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-9
+10
--- a/debian/control
+++ b/debian/control
@@ -1,36 +1,102 @@
-Source: openggsn
+Source: osmo-ggsn
 Maintainer: Osmocom team <openbsc@lists.osmocom.org>
 Section: net
 Priority: optional
-Maintainer: Harald Welte <laforge@gnumonks.org>
+Build-Depends: debhelper (>= 10),
-Build-Depends: debhelper (>= 9), autotools-dev, pkg-config, libdpkg-perl, git, dh-autoreconf, libosmocore-dev (>= 0.8.0)
+               autotools-dev,
               pkg-config,
               libdpkg-perl, git,
               dh-autoreconf,
               libosmocore-dev (>= 1.11.0),
               osmo-gsm-manuals-dev (>= 1.6.0),
               libgtpnl-dev (>= 1.3.0)
 Standards-Version: 3.9.6
-Homepage: http://sourceforge.net/projects/ggsn/
+Vcs-Browser: https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn
-Vcs-Git: git://ggsn.git.sourceforge.net/gitroot/ggsn/ggsn
+Vcs-Git: https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn
-Vcs-Browser: http://ggsn.git.sourceforge.net/git/gitweb.cgi?p=ggsn/ggsn;a=summary
+Homepage: https://projects.osmocom.org/projects/openggsn
-Package: openggsn
+Package: osmo-ggsn
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
+Depends: ${shlibs:Depends},
-Description: Gateway GPRS Support Node
+         ${misc:Depends}
 Description: Osmocom Gateway GPRS Support Node (GGSN)
 OsmoGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile
 operators as the interface between the Internet and the rest of the
 mobile network infrastructure.
-Package: libgtp0
+Package: libgtp11
 Architecture: any
 Multi-Arch: same
 Section: libs
-Depends: ${shlibs:Depends}, ${misc:Depends}
+Depends: ${shlibs:Depends},
-Multi-Arch: same
+         ${misc:Depends}
 Description: library implementing the GTP protocol between SGSN and GGSN
 OsmoGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile
 operators as the interface between the Internet and the rest of the
 mobile network infrastructure.
 .
 This library is part of OsmoGGSN and implements the GTP protocol between
 SGSN (Serving GPRS support node) and GGSN.
-Package: libgtp0-dev
+Package: gtp-echo-responder
 Depends: ${misc:Depends}, libgtp0 (= ${binary:Version})
 Multi-Arch: same
 Architecture: any
-Section: libdevel
+Depends: ${shlibs:Depends},
-Description: Development files for libgtp
+         ${misc:Depends}
 Description: Small program answering GTP ECHO Request with GTP ECHO Response
-Package: openggsn-dbg
+Package: libgtp-dev
 Architecture: any
 Multi-Arch: same
 Section: libdevel
 Depends: ${misc:Depends},
         libgtp11 (= ${binary:Version})
 Description: Development files for libgtp
 OsmoGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile
 operators as the interface between the Internet and the rest of the
 mobile network infrastructure.
 .
 The library libgtp implements the GTP protocol between SGSN and GGSN
 and this package contains the development files for this library.
 Package: osmo-ggsn-dbg
 Section: debug
 Architecture: any
 Priority: extra
-Depends: ${shlibs:Depends}, ${misc:Depends}, libgtp0 (= ${binary:Version}), openggsn (= ${binary:Version})
+Depends: ${shlibs:Depends}, ${misc:Depends}, libgtp11 (= ${binary:Version}), osmo-ggsn (= ${binary:Version})
 Multi-Arch: same
-Description: Debug symbols for OpenGGSN
+Description: Debug symbols for OsmoGGSN
 OsmoGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile
 operators as the interface between the Internet and the rest of the
 mobile network infrastructure.
 Package: gtp-echo-responder-dbg
 Section: debug
 Architecture: any
 Priority: extra
 Depends: ${shlibs:Depends}, ${misc:Depends}, gtp-echo-responder (= ${binary:Version})
 Multi-Arch: same
 Description: Debug symbols for gtp-echo-responder
 Small program answering GTP ECHO Request with GTP ECHO Response.
 Package: libgtp-dbg
 Section: debug
 Architecture: any
 Priority: extra
 Depends: ${shlibs:Depends}, ${misc:Depends}, libgtp11 (= ${binary:Version})
 Multi-Arch: same
 Description: Debug symbols for OsmoGGSN
 OsmoGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile
 operators as the interface between the Internet and the rest of the
 mobile network infrastructure.
 .
 The library libgtp implements the GTP protocol between SGSN and GGSN
 and this package contains the development files for this library.
 Package: osmo-ggsn-doc
 Architecture: all
 Section: doc
 Priority: optional
 Depends: ${misc:Depends}
 Description: ${misc:Package} PDF documentation
 Various manuals: user manual, VTY reference manual and/or
 protocol/interface manuals.
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,46 +1,62 @@
-This work was packaged for Debian by:
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: osmo-ggsn
 Source: https://osmocom.org/projects/openggsn
-    Harald Welte <laforge@gnumonks.org> on Tue, 24 Aug 2010 11:23:40 +0200
+Files: *
 Copyright: 2002-2004 Mondru AB, Author: Jens Jakobsen <jj@openggsn.org>
           2010-2017 Harald Welte <laforge@gnumonks.org>
           2012-2016 Holger Hans Peter Freyther <zecke@selfish.org>
           2014-2016 Pablo Neira Ayuso <pablo@gnumonks.org>
           2014-2016 sysmocom - s.f.m.c. GmbH
 License: GPL-2
-It was downloaded from:
+Files: lib/getopt.c
       lib/gnugetopt.h
       lib/getopt1.c
 Copyright: 1987-2001 Free Software Foundation, Inc.
 License: LGPL-2.1+
-    http://sourceforge.net/projects/ggsn
+Files: utils/gtp_echo_responder.c
       utils/gtp_echo_responder_test.py
 Copyright: 2021 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
 License: MIT
-Upstream Author(s):
+Files: debian/*
 Copyright: 2010-2017  Harald Welte <laforge@gnumonks.org>
           2016       Ruben Undheim <ruben.undheim@gmail.com>
 License: GPL-2
    Jens Jakobsen <jj@openggsn.org>
    Harald Welte <laforge@gnumonks.org>
-Copyright:
+License: GPL-2
 This package is free software: you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by
 the Free Software Foundation; version 2 of the License
 .
 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 .
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 .
 On Debian systems, the complete text of the GNU General Public
 License version 2 can be found in "/usr/share/common-licenses/GPL-2".
    Copyright (C) 2002 Mondru AB
    Copyright (C) 2010 Harald Welte <laforge@gnumonks.org>
-License:
+License: LGPL-2.1+
-
+ This package is free software: you can redistribute it and/or modify it
-   This package is free software; you can redistribute it and/or modify
+ under the terms of the GNU Lesser General Public License as published by
-   it under the terms of the GNU General Public License version 2 as
+ the Free Software Foundation, either version 2.1 of the License, or (at
-   published by the Free Software Foundation.
+ your option) any later version.
-
+ .
-    This package is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful, but
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    GNU General Public License for more details.
+ for more details.
-
+ .
-    You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
-    along with this program. If not, see <http://www.gnu.org/licenses/>
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+ .
-On Debian systems, the complete text of the GNU General
+ On Debian systems, the complete text of the GNU Lesser General Public
-Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".
+ License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".
 The Debian packaging is:
    Copyright (C) 2010 Harald Welte <laforge@gnumonks.org>
 you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 # Please also look if there are files or directories which have a
 # different copyright/license attached and list them here.
--- a/debian/docs
+++ b/debian/docs
@@ -1,2 +1 @@
-NEWS
+README.md
 README
--- a/debian/gtp-echo-responder.install
+++ b/debian/gtp-echo-responder.install
@@ -0,0 +1 @@
 /usr/bin/gtp-echo-responder
--- a/debian/libgtp0-dev.install
+++ b/debian/libgtp0-dev.install
--- a/debian/libgtp11.install
+++ b/debian/libgtp11.install
--- a/debian/libgtp11.shlibs
+++ b/debian/libgtp11.shlibs
@@ -0,0 +1,2 @@
 # Most recent version of the package that added new symbols (OS#5318)
 libgtp 11 libgtp11 (>= 1.13.0)
--- a/debian/openggsn.examples
+++ b/debian/openggsn.examples
@@ -1,2 +0,0 @@
 examples/ggsn.conf
 examples/sgsnemu.conf
--- a/debian/openggsn.init
+++ b/debian/openggsn.init
@@ -1,163 +0,0 @@
 #!/bin/sh
 ### BEGIN INIT INFO
 # Provides:          openggsn
 # Required-Start:    $network $local_fs $remote_fs
 # Required-Stop:     $network $remote_fs
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
 # Short-Description: Gateway GPRS Support Node
 # Description:       Gateway GPRS Support Node
 ### END INIT INFO
 # Author: Harald Welte <laforge@gnumonks.org>
 # PATH should only include /usr/* if it runs after the mountnfs.sh script
 PATH=/sbin:/usr/sbin:/bin:/usr/bin
 DESC="OpenGGSN Gateway GPRS Support Node"
 NAME=ggsn
 DAEMON=/usr/bin/ggsn
 DAEMON_ARGS=""             # Arguments to run the daemon with
 PIDFILE=/var/run/$NAME.pid
 SCRIPTNAME=/etc/init.d/openggsn
 # Exit if the package is not installed
 [ -x $DAEMON ] || exit 0
 # Read configuration variable file if it is present
 [ -r /etc/default/openggsn ] && . /etc/default/openggsn
 # Load the VERBOSE setting and other rcS variables
 . /lib/init/vars.sh
 # Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
 . /lib/lsb/init-functions
 DAEMON_ARGS="$DAEMON_ARGS"
 #
 # Function that starts the daemon/service
 #
 do_start()
 {
 	# Return
 	#   0 if daemon has been started
 	#   1 if daemon was already running
 	#   2 if daemon could not be started
 	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
 		|| return 1
 	# Check for runtime directory of nonvolatile data
 	if [ ! -d /var/lib/ggsn ]; then
 		mkdir /var/lib/ggsn
 	fi
 	# Check for GTP restart counter
 	if [ ! -f /var/lib/ggsn/gsn_restart ]; then
 		echo 0 > /var/lib/ggsn/gsn_restart
 	fi
 	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
 		$DAEMON_ARGS \
 		|| return 2
 	# Add code here, if necessary, that waits for the process to be ready
 	# to handle requests from services started subsequently which depend
 	# on this one.  As a last resort, sleep for some time.
 }
 #
 # Function that stops the daemon/service
 #
 do_stop()
 {
 	# Return
 	#   0 if daemon has been stopped
 	#   1 if daemon was already stopped
 	#   2 if daemon could not be stopped
 	#   other if a failure occurred
 	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
 	RETVAL="$?"
 	[ "$RETVAL" = 2 ] && return 2
 	# Wait for children to finish too if this is a daemon that forks
 	# and if the daemon is only ever run from this initscript.
 	# If the above conditions are not satisfied then add some other code
 	# that waits for the process to drop all resources that could be
 	# needed by services started subsequently.  A last resort is to
 	# sleep for some time.
 	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
 	[ "$?" = 2 ] && return 2
 	# Many daemons don't delete their pidfiles when they exit.
 	rm -f $PIDFILE
 	return "$RETVAL"
 }
 #
 # Function that sends a SIGHUP to the daemon/service
 #
 do_reload() {
 	#
 	# If the daemon can reload its configuration without
 	# restarting (for example, when it is sent a SIGHUP),
 	# then implement that here.
 	#
 	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
 	return 0
 }
 case "$1" in
  start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
    do_start
    case "$?" in
 		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
 		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
 	esac
  ;;
  stop)
 	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
 	do_stop
 	case "$?" in
 		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
 		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
 	esac
 	;;
  status)
       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  #reload|force-reload)
 	#
 	# If do_reload() is not implemented then leave this commented out
 	# and leave 'force-reload' as an alias for 'restart'.
 	#
 	#log_daemon_msg "Reloading $DESC" "$NAME"
 	#do_reload
 	#log_end_msg $?
 	#;;
  restart|force-reload)
 	#
 	# If the "reload" option is implemented then remove the
 	# 'force-reload' alias
 	#
 	log_daemon_msg "Restarting $DESC" "$NAME"
 	do_stop
 	case "$?" in
 	  0|1)
 		do_start
 		case "$?" in
 			0) log_end_msg 0 ;;
 			1) log_end_msg 1 ;; # Old process is still running
 			*) log_end_msg 1 ;; # Failed to start
 		esac
 		;;
 	  *)
 	  	# Failed to stop
 		log_end_msg 1
 		;;
 	esac
 	;;
  *)
 	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
 	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
 	exit 3
 	;;
 esac
 :
--- a/debian/openggsn.install
+++ b/debian/openggsn.install
@@ -1,3 +0,0 @@
 /usr/bin/ggsn
 /usr/bin/sgsnemu
 /usr/share/man/man8/*
--- a/debian/osmo-ggsn-doc.install
+++ b/debian/osmo-ggsn-doc.install
@@ -0,0 +1 @@
 usr/share/doc/osmo-ggsn-doc/*.pdf
--- a/debian/osmo-ggsn.examples
+++ b/debian/osmo-ggsn.examples
@@ -0,0 +1,3 @@
 doc/examples/osmo-ggsn.cfg
 doc/examples/osmo-ggsn-kernel-gtp.cfg
 doc/examples/sgsnemu.conf
--- a/debian/osmo-ggsn.install
+++ b/debian/osmo-ggsn.install
@@ -0,0 +1,5 @@
 /etc/osmocom/osmo-ggsn.cfg
 /lib/systemd/system/osmo-ggsn.service
 /usr/bin/osmo-ggsn
 /usr/bin/sgsnemu
 /usr/share/man/man8/*
--- a/debian/postinst
+++ b/debian/postinst
@@ -0,0 +1,39 @@
 #!/bin/sh -e
 case "$1" in
 	configure)
 		# Create the osmocom group and user (if it doesn't exist yet)
 		if ! getent group osmocom >/dev/null; then
 			groupadd --system osmocom
 		fi
 		if ! getent passwd osmocom >/dev/null; then
 			useradd \
 				--system \
 				--gid osmocom \
 				--home-dir /var/lib/osmocom \
 				--shell /sbin/nologin \
 				--comment "Open Source Mobile Communications" \
 				osmocom
 		fi
 		# Fix permissions of previous (root-owned) install (OS#4107)
 		if dpkg --compare-versions "$2" le "1.13.0"; then
 			if [ -e /etc/osmocom/osmo-ggsn.cfg ]; then
 				chown -v osmocom:osmocom /etc/osmocom/osmo-ggsn.cfg
 				chmod -v 0660 /etc/osmocom/osmo-ggsn.cfg
 			fi
 			if [ -d /etc/osmocom ]; then
 				chown -v root:osmocom /etc/osmocom
 				chmod -v 2775 /etc/osmocom
 			fi
 			mkdir -p /var/lib/osmocom
 			chown -R -v osmocom:osmocom /var/lib/osmocom
 		fi
 		;;
 esac
 # dh_installdeb(1) will replace this with shell code automatically
 # generated by other debhelper scripts.
 #DEBHELPER#
--- a/debian/rules
+++ b/debian/rules
@@ -1,24 +1,29 @@
 #!/usr/bin/make -f
 # -*- makefile -*-
 # Sample debian/rules that uses debhelper.
 #
 # This file was originally written by Joey Hess and Craig Small.
 # As a special exception, when this file is copied by dh-make into a
 # dh-make output file, you may use that output file without restriction.
 # This special exception was added by Craig Small in version 0.37 of dh-make.
 #
 # Modified to make a template file for a multi-binary package with separated
 # build-arch and build-indep targets  by Bill Allombert 2001
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE=1
 DEBIAN  := $(shell dpkg-parsechangelog | grep ^Version: | cut -d' ' -f2)
 DEBVERS := $(shell echo '$(DEBIAN)' | cut -d- -f1)
 VERSION := $(shell echo '$(DEBVERS)' | sed -e 's/[+-].*//' -e 's/~//g')
 # This has to be exported to make some magic below work.
 #export DH_OPTIONS
-export DEB_BUILD_HARDENING=1
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 %:
 	dh $@ --with autoreconf
 override_dh_strip:
-	dh_strip --dbg-package=openggsn-dbg
+	dh_strip -posmo-ggsn --dbg-package=osmo-ggsn-dbg
 	dh_strip -plibgtp11 --dbg-package=libgtp-dbg
 override_dh_auto_configure:
 	dh_auto_configure -- \
 		--enable-gtp-linux \
 		--with-systemdsystemunitdir=/lib/systemd/system \
 		--enable-manuals
 # Don't create .pdf.gz files (barely saves space and they can't be opened directly by most pdf readers)
 override_dh_compress:
 	dh_compress -X.pdf
--- a/doc/Compliance.html
+++ b/doc/Compliance.html
@@ -7,7 +7,7 @@
 </head>
 <body>
 <h1>Protocol Compliance List</h1>
-OpenGGSN supports both GTP0 (GSM 09.60) and GTP1 (3GPP 29.060). In the
+OsmoGGSN supports both GTP0 (GSM 09.60) and GTP1 (3GPP 29.060). In the
 following tables the support of each individual message type is
 detailed. The numbers before each feature indicates the relevant
 section in the standard.<br>
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,6 +1,8 @@
-man_MANS = ggsn.8 sgsnemu.8
+man_MANS = osmo-ggsn.8 sgsnemu.8
 man_aux = $(man_MANS:.1=.x)
 EXTRA_DIST = $(man_MANS)
-
+SUBDIRS = \
-
+	examples \
 	manuals \
 	$(NULL)
--- a/doc/examples/Makefile.am
+++ b/doc/examples/Makefile.am
@@ -0,0 +1,31 @@
 OSMOCONF_FILES = \
 	osmo-ggsn.cfg \
 	$(NULL)
 osmoconfdir = $(sysconfdir)/osmocom
 osmoconf_DATA = $(OSMOCONF_FILES)
 EXTRA_DIST = $(OSMOCONF_FILES)
 CFG_FILES = find $(srcdir) -name '*.cfg' -o -name '*.conf' | sed -e 's,^$(srcdir),,'
 dist-hook:
 	for f in $$($(CFG_FILES)); do \
 		j="$(distdir)/$$f" && \
 		mkdir -p "$$(dirname $$j)" && \
 		$(INSTALL_DATA) $(srcdir)/$$f $$j; \
 	done
 install-data-hook:
 	for f in $$($(CFG_FILES)); do \
 		j="$(DESTDIR)$(docdir)/examples/$$f" && \
 		mkdir -p "$$(dirname $$j)" && \
 		$(INSTALL_DATA) $(srcdir)/$$f $$j; \
 	done
 uninstall-hook:
 	@$(PRE_UNINSTALL)
 	for f in $$($(CFG_FILES)); do \
 		j="$(DESTDIR)$(docdir)/examples/$$f" && \
 		$(RM) $$j; \
 	done
--- a/doc/examples/firewall
+++ b/doc/examples/firewall
@@ -0,0 +1,48 @@
 #!/bin/sh
 #
 # Firewall script for GGSN
 #
 # Uses $IFGN (eth0) as the Gn interface (Gn) and
 # $IFGI (eth1) as the Gi interface.
 #
 # SUMMARY
 # * All connections originating from GGSN are allowed.
 # * Incoming ssh, GTPv0 and GTPv1 is allowed on the Gn interface.
 # * Incoming ssh is allowed on the Gi interface.
 # * Forwarding is allowed to and from the Gi interface, but disallowed
 #   to and from the Gn interface.
 # * Masquerede on Gi interface.
 NFT="nft"
 IFGN="eth0"
 IFGI="eth1"
 $NFT add chain ip filter input '{ policy drop; }'
 $NFT add chain ip filter forward '{ policy accept; }'
 $NFT add chain ip filter output '{ policy accept; }'
 #Allow related and established on all interfaces (input)
 $NFT add rule ip filter input ct state related,established counter accept
 #Allow releated, established, GTP and ssh on $IFGN. Reject everything else.
 $NFT add rule ip filter input iifname $IFGN tcp dport 22 tcp flags syn / fin,syn,rst,ack counter accept
 $NFT add rule ip filter input iifname $IFGN udp dport 2123 counter accept
 $NFT add rule ip filter input iifname $IFGN udp dport 2152 counter accept
 $NFT add rule ip filter input iifname $IFGN udp dport 3386 counter accept
 $NFT add rule ip filter input iifname $IFGN counter reject
 #Allow related, established and ssh. Drop everything else.
 $NFT add rule ip filter input iifname $IFGI tcp dport 22 tcp flags syn / fin,syn,rst,ack counter accept
 $NFT add rule ip filter input iifname $IFGI counter drop
 # Masquerade everything going out on $IFGI
 $NFT add rule ip nat POSTROUTING oifname $IFGI counter masquerade
 #Allow everything on loopback interface.
 $NFT add rule ip filter input iifname "lo" counter accept
 # Drop everything to and from $IFGN (forward)
 $NFT add rule ip filter forward iifname $IFGN counter drop
 $NFT add rule ip filter forward oifname $IFGN counter drop
--- a/doc/examples/osmo-ggsn-kernel-gtp.cfg
+++ b/doc/examples/osmo-ggsn-kernel-gtp.cfg
@@ -0,0 +1,54 @@
 !
 ! OpenGGSN (0.94.1-adac) configuration saved from vty
 !!
 !
 log stderr
 logging color 1
 logging print category-hex 0
 logging print category 1
 logging timestamp 0
 logging print file basename last
 logging print level 1
 logging level ip info
 logging level tun info
 logging level ggsn info
 logging level sgsn notice
 logging level icmp6 notice
 logging level lglobal notice
 logging level llapd notice
 logging level linp notice
 logging level lmux notice
 logging level lmi notice
 logging level lmib notice
 logging level lsms notice
 logging level lctrl notice
 logging level lgtp info
 logging level lstats notice
 logging level lgsup notice
 logging level loap notice
 logging level lss7 notice
 logging level lsccp notice
 logging level lsua notice
 logging level lm3ua notice
 logging level lmgcp notice
 !
 stats interval 5
 !
 line vty
 no login
 !
 ggsn ggsn0
 gtp state-dir /var/lib/osmocom/osmo-ggsn
 gtp bind-ip 127.0.0.2
 apn internet
  gtpu-mode kernel-gtp
  tun-device tun4
  type-support v4
  mtu default apply
  ip prefix dynamic 172.16.222.0/24
  ip dns 0 8.8.8.8
  ip dns 1 8.8.4.4
  ip ifconfig 172.16.222.0/24
  no shutdown
 default-apn internet
 no shutdown ggsn
--- a/doc/examples/osmo-ggsn.cfg
+++ b/doc/examples/osmo-ggsn.cfg
@@ -0,0 +1,78 @@
 !
 ! OpenGGSN (0.94.1-adac) configuration saved from vty
 !!
 !
 log stderr
 logging color 1
 logging print category-hex 0
 logging print category 1
 logging timestamp 0
 logging print file basename last
 logging print level 1
 logging level ip info
 logging level tun info
 logging level ggsn info
 logging level sgsn notice
 logging level icmp6 notice
 logging level lglobal notice
 logging level llapd notice
 logging level linp notice
 logging level lmux notice
 logging level lmi notice
 logging level lmib notice
 logging level lsms notice
 logging level lctrl notice
 logging level lgtp info
 logging level lstats notice
 logging level lgsup notice
 logging level loap notice
 logging level lss7 notice
 logging level lsccp notice
 logging level lsua notice
 logging level lm3ua notice
 logging level lmgcp notice
 !
 stats interval 5
 !
 line vty
 no login
 !
 ggsn ggsn0
 gtp state-dir /var/lib/osmocom/osmo-ggsn
 gtp bind-ip 127.0.0.2
 apn internet
  gtpu-mode tun
  tun-device tun4
  type-support v4
  mtu default apply
  ip prefix dynamic 172.16.222.0/24
  ip dns 0 8.8.8.8
  ip dns 1 8.8.4.4
  ip ifconfig 172.16.222.0/24
  no shutdown
 apn inet6
  gtpu-mode tun
  tun-device tun6
  type-support v6
  mtu default apply
  ipv6 prefix dynamic 2001:780:44:2000:0:0:0:0/56
  ipv6 dns 0 2001:4860:4860::8888
  ipv6 dns 1 2001:4860:4860::8844
  ipv6 ifconfig 2001:780:44:2000:0:0:0:0/56
  no shutdown
 apn inet46
  gtpu-mode tun
  tun-device tun46
  type-support v4v6
  mtu default apply
  ip prefix dynamic 172.16.46.0/24
  ip dns 0 8.8.8.8
  ip dns 1 8.8.4.4
  ip ifconfig 172.16.46.0/24
  ipv6 prefix dynamic 2001:780:44:2100:0:0:0:0/56
  ipv6 dns 0 2001:4860:4860::8888
  ipv6 dns 1 2001:4860:4860::8844
  ipv6 ifconfig 2001:780:44:2100:0:0:0:0/56
  no shutdown
 default-apn internet
 no shutdown ggsn
--- a/doc/examples/sgsnemu.conf
+++ b/doc/examples/sgsnemu.conf
--- a/doc/manuals/Makefile.am
+++ b/doc/manuals/Makefile.am
@@ -0,0 +1,24 @@
 EXTRA_DIST = osmoggsn-usermanual.adoc \
    osmoggsn-usermanual-docinfo.xml \
    osmoggsn-vty-reference.xml \
    regen_doc.sh \
    chapters \
    vty
 if BUILD_MANUALS
  ASCIIDOC = osmoggsn-usermanual.adoc
  ASCIIDOC_DEPS = $(srcdir)/chapters/*.adoc
  include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.asciidoc.inc
  VTY_REFERENCE = osmoggsn-vty-reference.xml
  BUILT_REFERENCE_XML = $(builddir)/vty/ggsn_vty_reference.xml
  $(builddir)/vty/ggsn_vty_reference.xml: $(top_builddir)/ggsn/osmo-ggsn
 	mkdir -p $(builddir)/vty
 	$(top_builddir)/ggsn/osmo-ggsn --vty-ref-xml > $@
  include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.vty-reference.inc
  OSMO_REPOSITORY=osmo-ggsn
  include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.common.inc
 endif
--- a/doc/manuals/chapters/configuration.adoc
+++ b/doc/manuals/chapters/configuration.adoc
@@ -0,0 +1,346 @@
 [[osmoggsn_configuring]]
 == Configuring OsmoGGSN
 All configuration of OsmoGGSN is performed using the VTY. For more
 general information on the VTY interface, see <<vty>>.
 === Configuring a virtual GGSN instance
 OsmoGGSN can run multiple GGSN instances inside one program/process.
 Each GGSN instance binds to its own transport-layer GTP IP address and
 has its own set of APNs and associated IP address pools + tun/gtp
 devices.
 In most usage cases, yo will only have a single GGSN instance inside
 your configuration file, like in below example:
 .Example: Single GGSN configuration section
 ----
 ggsn ggsn0
 gtp state-dir /var/lib/osmocom/osmo-ggsn
 gtp bind-ip 127.0.0.6
 apn internet
  gtpu-mode tun
  tun-device tun4
  type-support v4
  mtu default apply
  ip prefix dynamic 176.16.222.0/24
  ip dns 0 192.168.100.1
  ip dns 1 8.8.8.8
  ip ifconfig 176.16.222.0/24
  no shutdown
 ----
 ==== Creating/Editing a GGSN instance
 Creating/Editing a GGSN instance can be done by the following sequence
 of VTY commands:
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# <4>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Create or edit the GGSN instance `ggsn0`. The name can be any ASCII
    string, its significance is only to the local user.
 <4> Your prompt is now in the `ggsn` config node, where you can
    configure the properties of this GGSN instance.
 NOTE:: After creating a new GGSN instance, it is in `shutdown` mode. See
 <<unshutdown_apn>> to take it out of shutdown, but make sure to configure it fully
 before taking it out of shutdown.
 ==== Configuring a GGSN instance
 The following two mandatory configuration statements have to be given
 for every GGSN instance:
 ----
 OsmoGGSN(config-ggsn)# gtp state-dir /var/lib/osmocom/osmo-ggsn <1>
 OsmoGGSN(config-ggsn)# gtp bind-ip 127.0.0.6 <2>
 ----
 <1> Store the GSN restart state in the specified directory
 <2> Bind the GGSN instance to the specified local IPv4 address
 There are some further configuration statements that can be used at the
 GGSN node, some examples are given below.  For a full list, see the
 _OsmoGGSN VTY reference manual_ <<vty-ref-osmoggsn>>.
 ----
 OsmoGGSN(config-ggsn)# default-apn foobar <1>
 ----
 <1> Configure a default APN to be used if the user-requested APN is not
    found.  The named APN must previously be configured
 ==== Deleting a GGSN instance
 A GGSN instance can be removed like this
 .Example: Deleting a GGSN instance
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# no ggsn ggsn0 <3>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Delete the GGSN instance
 ==== Taking a GGSN instance out of shutdown
 .Example: Taking a GGSN instance out of shutdown
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# no shutdown ggsn <4>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Take the GGSN instance out of shutdown
 ==== Shutting a GGSN instance down
 If you would like to take a GGSN instance out of service, you can
 put it into shutdown mode.  This will make the entire GGSN unavailable
 to user traffic and permit you to e.g. reconfigure it before taking it
 out of shutdown again.
 .Example: Shutting down a GGSN instance
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# shutdown ggsn <4>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Shut down the GGSN instance
 === Configuring an Access Point Name
 An Access Point Name (APN) represents a connection to an external packet
 data network, such as the public Internet or private corporate networsk.
 APNs are selected by terminals (MS/UE) when establishing PDP contexts.
 Each OsmoGGSN GGSN instance can have any number of APNs configured.
 Each APN is identified by a string name.
 ==== Creating/Editing an APN
 .Example: Creating a new APN
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# apn internet <4>
 OsmoGGSN(config-ggsn-apn)# <5>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Create or Edit an APN called `internet`
 <5> Your prompt is now in the `ggsn` config node, where you can
    configure the properties of this GGSN instance.
 NOTE:: The newly-create APN is created in `shutdown` mode. See <<unshutdown_apn>> to take it
 out of shutdown.
 ==== Configuring an APN
 .Example: Configuring an APN
 ----
 OsmoGGSN(config-ggsn-apn)# gtpu-mode tun <1>
 OsmoGGSN(config-ggsn-apn)# type-support v4 <2>
 OsmoGGSN(config-ggsn-apn)# mtu 1420 apply <3>
 OsmoGGSN(config-ggsn-apn)# ip prefix dynamic 176.16.222.0/24 <4>
 OsmoGGSN(config-ggsn-apn)# ip dns 0 192.168.100.1 <5>
 OsmoGGSN(config-ggsn-apn)# ip dns 1 8.8.8.8 <6>
 OsmoGGSN(config-ggsn-apn)# ip ifconfig 176.16.222.0/24 <7>
 ----
 <1> Use the userspace GTP-U handling using a TUN device
 <2> Support (only) IPv4 Addresses
 <3> Specify MTU to announce to MS. Apply the MTU on the tunnel interface.
 <4> Specify the pool of dynamic IPv4 addresses to be allocated to PDP
    contexts
 <5> Specify the primary DNS server to be provided using IPCP/PCO
 <6> Specify the secondary DNS server to be provided using IPCP/PCO
 <7> Request OsmoGGSN to configure the `tun4` device network/netmask
 NOTE:: If you use the optional `ip ifconfig` command to set the network
 device address/mask, OsmoGGSN must run with root or `CAP_NET_ADMIN`
 support.  It might be better to configure related tun devices at system
 startup and run OsmoGGSN as non-privileged user.  See <<ggsn_no_root>> for more
 details.
 ==== Deleting an APN
 An APN configuration can be removed like this
 .Example: Deleting an APN
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# no apn internet <4>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Delete the APN `internet`
 [[unshutdown_apn]]
 ==== Taking an APN out of shutdown
 In order to bring a deactived APN in `shutdown` state into active
 operation, use the `no shutdown` command at the APN node as explained in
 the following example:
 .Example: Taking an APN out of shutdown
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# apn internet <4>
 OsmoGGSN(config-ggsn-apn)# no shutdown <5>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Enter the config node of the APN `internet`
 <5> Take the APN out of shutdown
 ==== Shutting an APN down
 If you would like to take an APN instance out of service, you can
 put it into shutdown mode.  This will make the APN unavailable
 to user traffic and permit you to e.g. reconfigure it before taking it
 out of shutdown again.
 .Example: Shutting down an APN
 ----
 OsmoGGSN> enable <1>
 OsmoGGSN# configure terminal <2>
 OsmoGGSN(config)# ggsn ggsn0 <3>
 OsmoGGSN(config-ggsn)# apn internet <4>
 OsmoGGSN(config-ggsn-apn)# shutdown <5>
 ----
 <1> Change into privileged mode
 <2> Enter the interactive configuration mode
 <3> Enter the config node of the GGSN instance `ggsn0`
 <4> Enter the config node of the APN `internet`
 <5> Shut down the APN
 [[ggsn_no_root]]
 === Configuring for running without root privileges
 It's possible to run OsmoGGSN without root privileges if the tun devices are already configured.
 The interface creation + configuration must then happen before osmo-ggsn starting up.  This can be
 achieved by means such as
 * a custom shell script run as root before starting osmo-ggsn (e.g. as init script)
 * systemd .netdev and .network files, if your system is using systemd-networkd (see `networkctl status`).
 ==== Manual TUN device creation / configuration
 If you chose to go for custom shell/init scripts, you may use the `ip` program which is the standard
 tool for network interface configuration on Linux, part of the `iproute2` package.  In order to
 create a tun device, you must call it like this:
 .Example: iproute2 command to create a tun device
 ----
 # ip tuntap add dev apn0 mode tun user username group groupname
 ----
 Where _username_ and _groupname_ correspond to the User and Group that will have ownership over the
 device, i.e. the privileges which you intend to run osmo-ggsn under, and _apn0_ will be the
 name of the network device created.  After creating the interface, you can configure its addresses
 using standard means like `ip addr add` or your distribution-specific utilities/tools
 to match the `ip prefix dynamic` config item, and activate the link, for example:
 ----
 # ip addr add 192.168.7.1/24 dev apn0
 # ip link set mtu 1420 dev apn0
 # ip link set apn0 up
 ----
 ==== systemd based TUN device creation+configuration
 If you want to have systemd take care of creating and configuring a tun device for you,
 you can use the below example config files.
 .Example: device config via systemd-networkd using apn0.netdev
 ----
 [NetDev]
 Name=apn0 <1>
 Kind=tun
 [Tun]
 User=username <2>
 Group=username <3>
 ----
 <1> The network interface name of the newly-created device
 <2> The username under which you will run OsmoGGSN
 <3> The group name under which you will run OsmoGGSN
 .Example: network settings via systemd-networkd using ggsn.network
 ----
 [Match]
 Name=apn0 <1>
 [Link]
 MTUBytes=1420 <2>
 [Network]
 Address=192.168.7.1/24 <3>
 IPMasquerade=yes <4>
 ----
 <1> The network device name, which must match the one in the apn0.netdev unit file above
 <2> Requesting systemd to set the MTU for this interface. The MTU of the tun
    interface should be lower than regular, since it must accommodate the extra IP/UDP/GTPv1U headers.
 <3> The local IP address configured on the device
 <4> Requesting systemd to configure IP masquerading for this interface.  Depending on your needs,
    You may not want this if you have proper end-to-end routing set up, and want to have transparent
    inbound IP access to your GPRS-attached devices.
 ==== Config Changes
 With the tun device pre-configured in one of the ways outlined above, the main
 changes in your osmo-ggsn.cfg file are:
 * remove `ip ifconfig` directive,
 * make sure that `no shutdown` is present in the `apn` section as well as
  `no shutdown ggsn` in the `ggsn` section.
 .Example: using externally configured tun device `apn0` as non-root
 ----
 ggsn ggsn0
 gtp state-dir /tmp
 gtp bind-ip 127.0.0.6
 apn internet
  gtpu-mode tun
  tun-device apn0
  type-support v4
  mtu 1420
  ip prefix dynamic 192.168.7.0/24
  ip dns 0 192.168.100.1
  ip dns 1 8.8.8.8
  no shutdown
 default-apn internet
 no shutdown ggsn
 ----
--- a/doc/manuals/chapters/mtu.adoc
+++ b/doc/manuals/chapters/mtu.adoc
@@ -0,0 +1,171 @@
 === MTU considerations
 When running OsmoGGSN, the user may want to take network Maximum Transmission
 Unit (MTU) into consideration, and configure it based on network specific setup.
 Applying and announcing a proper MTU provides, for the MS employing it, reduced
 transmission overhead (ie. due to IP fragmentation) and avoids potential
 problems due to misconfigured nodes in the path (e.g. ICMP packet filtering).
 In OsmoGGSN, the MTU can be configured per APN through the VTY, see
 <<osmoggsn_configuring>>. If told so by the config, osmo-ggsn will apply the MTU
 on the APN network interface.
 ==== MTU announced to MS
 The configured MTU is also announced to the MS through:
 * IPv4 APN: GTPv1C Create PDP Context Response, PCO IE "IPv4 Link MTU", 3GPP TS
  24.008 Table 10.5.154.
 * IPv6 APN: ICMPv6 Routing Advertisement during IPv6 SLAAC procedure, RFC 4861.
 NOTE: It is up to the MS to request and use the link MTU size provided by the
 network. Hence, providing an MTU size does not guarantee that there will be no
 packets larger than the provided value.
 ==== GTP-U tunnel overhead
 OsmoGGSN is encapsulating traffic over GTP-U, it means the packets being received,
 encapsulated and transmitted over the tunnel get their size increased by the sum of
 IP/UDP/GTPv1U headers being prepended:
 * IP: IPv4 headers can take up to 60 bytes (due to IPv4 options). IPv6 headers
  can take up to 40 bytes (assuming no extension headers for IPv6 in general,
  since they are uncommon). Hence, the 60 bytes of IPv4 are picked since that's
  greater than the IPv4.
 * UDP: The UDP header takes 8 bytes.
 * GTPv1U: The GTPv1U header takes 12 bytes, assuming here no extensions headers
  are used (OsmoGGSN doesn't use them).
 Hence, these headers add an overhead of up to `80`` bytes, as per the below formula:
 ----
 GTPv1U_OVERHEAD = 60 + 8 + 12 = 80 bytes
 ----
 ==== Figuring out optimal MTU value
 There is no golden MTU value, since it really depends on the local (and remote)
 networks where traffic is routed. The idea is finding out a value that:
 * Is as big as possible, to avoid need to split big chunks of data into lots of
  small packets, hence affecting performance due to processing overhead: extra
  headers being trnasmitted, plus processing of extra packets.
 * Is small enough so that it can be transported over the lower layers of the
  links involving the communication, avoiding IP fragmentation, which again hurts
  performance.
 OsmoGGSN, by default, assumes that traffic is transported over an Ethernet
 network, which has a standarized maximum MTU of 1500 bytes. Hence, by default it
 announces an MTU of of `1420` bytes as per the following formula:
 ----
 TUNNEL_MTU = ETH_MTU - GTPv1U_OVERHEAD = 1500 - 80 = 1420 bytes
 ----
 Under certain networks, the base MTU may already be smaller than Ethernet's MTU
 (1500 bytes), due to, for instance, existence of some sort of extra tunneling
 protocol in the path, such as a VPN, ipsec, extra VLAN levels, etc. Under this
 scenario, the user must take care of figuring out the new base MTU value to use
 for the calculations presented above. This can be accomplished by packet
 inspection (eg. `wireshark`) or with tools such as `ping`, running it with a
 certain packet size and the IPv4 DF bit set, and see up to which packet size the
 networks is able to forward the message.
 .Example: Test if packets of 1420 bytes can reach peer host 176.16.222.4
 ----
 $ ping -M probe 176.16.222.4 -s 1420
 ----
 === Increasing outer MTU
 Specifications at IEEE 802.3 establish that standard Ethernet has a maximum MTU
 of `1500` bytes.
 However, many Ethernet controllers can nowadays overcome this limit and allow
 the use of so called _jumbo frames_. The _jumbo frames_ maximum MTU varies
 depending on the implementation, with `9000` bytes being a commonly used limit.
 Note that using MTUs over the standarized `1500` bytes by means of _jumbo frames_
 can create interoperability problems with networks not supporting such frames
 (eg. forcing of IP packet fragmentation), plus the fact that larger frames
 consume more Ethernet link transmission time, causing greater delays and
 increasing latency.
 Nevertheless, if the operator:
 * is in control of the whole GTP-U path between OsmoGGSN and the MS, and
 * has Ethernet NICs supporting MTUs bigger than 1500 or uses any other link
  layer supporting as well bigger MTUs.
 Then, it may be wise for the operator to configure such links with an increased
 outer MTU so that they can end up transporting GTP-U inner payload of 1500 bytes
 without fragmentation ocurring.
 Hence, following the examples presented on the above sections, one could
 configure *all the links* which are part of the GTP-U path to use an outer MTU
 of `1580` bytes, as per the following formula:
 ----
 TUNNEL_MTU = ETH_MTU + GTPv1U_OVERHEAD = 1500 + 80 = 1580 bytes
 ----
 .Example: Setting an MTU of `1580` to network interface `eth0` under Linux
 ----
 ip link set mtu 1580 dev eth0
 ----
 ==== TCP MSS Clamping
 Usually endpoints use Path MTU Discovery (PMTUD) to determine the maximum MTU to
 reach the peer. However, this technique may sometimes not be optimal for all
 users of OsmoGGSN:
 * MS may not support requesting and/or configuring the MTU OsmoGGSN announced.
 * MS may not support PMTUD on its network stack, or may not have it enabled or
  may be buggy.
 * Network may be misconfigured or some middlebox may be buggy (eg. not
  forwarding ICMP `Packet Too Big` packets).
 Furthermore, PMTUD takes time to figure out the maximum MTU to use, since it
 relies on sending data and checking if it got lost, and adapting to the fact,
 reducing efficiency (throughput) of connections or even stalling them completely
 when big packets are generated.
 Hence, it may become useful for the operator of OsmoGGSN to, on top of MTU
 configuration, also configure its network to tune TCP Maximum Segment Size (MSS)
 option of TCP connections being established over the GTPv1U tunnel. This will
 make sure at least TCP connections can use the full capacity of the path MTU
 without passing its imit.
 The MSS TCP option is an optional parameter in the TCP header sent during TCP
 initial handshake (`SYN,SYN/ACK`) that specifies the maximum amount of bytes of
 TCP payload a TCP chunk may transport. The MSS value doesn't count the
 underlaying IP/TCP headers.
 Hence, following up on MTU size calculations from previous section, with a
 sample GTPv1U MTU of 1420 bytes and IP header of 60 bytes, plus taking into
 account that TCP header can span up to 56 bytes, we'd get to an MSS value of:
 ----
 MSS = TUNNEL_MTU - IP_HDR - TCP_HDR = 1420 - 60 - 56 = 1304
 ----
 In linux, the MSS of TCP connections can be clamped using nftables:
 ----
 nft 'add rule ip nat prerouting iifname "apn0" tcp flags syn / syn,rst counter tcp option maxseg size set 1304'
 nft 'insert rule ip nat postrouting oifname "apn0" tcp flags syn / syn,rst counter tcp option maxseg size set 1304'
 nft 'add rule ip6 nat prerouting iifname "apn0" tcp flags syn / syn,rst counter tcp option maxseg size set 1304'
 nft 'insert rule ip6 nat postrouting oifname "apn0" tcp flags syn / syn,rst counter tcp option maxseg size set 1304'
 ----
 ==== Further Reading
 Check the following specs regarding MTU in 3GPP mobile networks:
 * 3GPP TS 29.061 section 11.2.1.5
 * 3GPP TS 290.060 section 13.2 IP Fragmentation
 * 3GPP TS 25.414 section 6.1.3.3
 * 3GPP TS 23.060 section 9.3, Annex C
 * 3GPP TS 24.008 (PCO IPv4 MTU)
 * RFC 4861 (IPv6 Router Advertisement)
--- a/doc/manuals/chapters/overview.adoc
+++ b/doc/manuals/chapters/overview.adoc
@@ -0,0 +1,140 @@
 [[chapter_introduction]]
 == Overview
 [[intro_overview]]
 === About OsmoGGSN
 OsmoGGSN is a Free / Open Source Software implementation of the GPRS
 GGSN (Gateway GPRS support node) element in side the packet switched
 core network of 2G and 3G cellular networks.
 The GGSN function is the tunnel endpoint on the core network side,
 from where the external (IP) packet data network
 === Software Components
 ==== GTP Implementation (libgtp)
 The OsmoGGSN source code includes a shared library implementation of
 the GTP protocol used on the GGSN-SGSN interface.  This library
 and associated header files are installed system-wide and are
 available to other programs/applications.
 In fact, libgtp is what the OsmoSGSN also uses for its use of GTP.
 ==== sgsnemu
 In order to test OsmoGGSN without running a SGSN and other elements
 of a cellular network, there is a small command-line utility called
 *sgsnemu* which is able to simulate the customary operations of a SGSN
 towards the GGSN, such as a PDP Context Activation.
 *sgsnemu* can even be used for testing against other GGSNs, as the GTP
 protocol is standardized across implementations.
 ==== osmo-ggsn
 *osmo-ggsn* is the actual name of the OsmoGGSN executable program.  It
 implements the GGSN functionality.  All parameters are set using the
 configuration file, by default located in *./osmo-ggsn.cfg*
 ==== systemd service file
 In *contrib/osmo-ggsn.service* you can find a sample service file for
 OsmoGGSN which can be used with systemd.
 === Limitations
 OsmoGGSN supports both GTP0 (GSM 09.60) and GTP1 (3GPP 29.060). In the
 following tables the support of each individual message type is
 detailed. The numbers before each feature indicates the relevant
 section in the standard.
 ==== GSM 09.60 (GTPv0)
 [options="header",cols="50%,15%,15%,15%,5%"]
 |===
 | Feature                | gtplib      | osmo-ggsn   | sgsnemu     | notes
 5+<|*7.4 Path Management Messages*
 |7.4.1 Echo Request      |Supported   |Supported   |Supported   |
 |7.4.2 Echo Response     |Supported   |Supported   |Supported   |
 |7.4.3 Version Not Supported      |Supported   |Supported   |Supported   |
 5+<| *7.5 Tunnel Management Messages*
 |7.5.1 Create PDP Context Request|Supported   |Supported   |Supported   |
 |7.5.2 Create PDP Context Response|Supported   |Supported   |Supported   |
 |7.5.3 Update PDP Context Request|Supported   |Supported   |Not         |
 |7.5.4 Update PDP Context Response|Supported   |Supported   |Not         |
 |7.5.5 Delete PDP Context Request|Supported   |Supported   |Supported   |
 |7.5.6 Delete PDP Context Response|Supported   |Supported   |Supported   |
 |7.5.7 Create AA PDP Context Request|Unsupported |Unsupported |Unsupported |
 |7.5.8 Create AA PDP Response|Unsupported |Unsupported |Unsupported |
 |7.5.9 Delete AA PDP Context Request|Unsupported |Unsupported |Unsupported |
 |7.5.10 Delete AA PDP Context Response|Unsupported |Unsupported |Unsupported |
 |7.5.11 Error Indication |Supported   |Supported   |Supported   |
 |7.5.12 PDU Notification Request|Unsupported |Unsupported |Unsupported |
 |7.5.13 PDU Notification Response|Unsupported |Unsupported |Unsupported |
 |7.5.14 PDU Notification Reject Request|Unsupported |Unsupported |Unsupported |
 |7.5.15 PDU Notification Reject Response|Unsupported |Unsupported |Unsupported |
 5+<| *7.6 Location Management Messages*
 |7.6.1 Send Routeing Information for GPRS Request|Unsupported |Unsupported |Not applicable  |
 |7.6.2 Send Routeing Information for GPRS Response|Unsupported |Unsupported |Not applicable  |
 |7.6.3 Failure Report Request|Unsupported |Unsupported |Not applicable |
 |7.6.3 Failure Report Response|Unsupported |Unsupported |Not applicable |
 |7.6.5 Note MS GPRS Present Request|Unsupported |Unsupported |Not applicable|
 |7.6.6 Note MS GPRS Present Response|Unsupported |Unsupported |Not applicable|
 5+<| *7.5 Mobility Management Messages*
 |7.5.1 Identification Request|Unsupported |Not applicable|Not applicable|
 |7.5.2 Identification Response|Unsupported |Not applicable|Not applicable |
 |7.5.3 SGSN Context Request|Unsupported |Not applicable|Not applicable|
 |7.5.4 SGSN Context Response|Unsupported |Not applicable|Not applicable|
 |7.5.5 SGSN Context Acknowledge|Unsupported |Not applicable|Not applicable|
 |===
 ==== 3GPP 29.060 (GTPv1)
 [options="header",cols="50%,15%,15%,15%,5%"]
 |===
 |Feature                 |gtplib      |osmo-ggsn   |sgsnemu     |notes
 5+<|*7.2 Path Management Messages*
 |7.2.1 Echo Request      |Supported   |Supported   |Supported   |
 |7.2.2 Echo Response     |Supported   |Supported   |Supported   |
 |7.2.3 Version Not Supported|Supported   |Supported   |Supported   |
 |7.2.4 Extension Headers Notification|Supported   |Supported   |Supported   |
 5+<|*7.3 Tunnel Management Messages*
 |7.3.1 Create PDP Context Request|Supported   |Supported   |Supported   |1
 |7.3.2 Create PDP Context Response|Supported   |Supported   |Supported   |
 |7.3.3 Update PDP Context Request|Supported   |Supported   |Not applicable|1
 |7.3.4 Update PDP Context Response|Supported   |Supported   |Not applicable|
 |7.3.5 Delete PDP Context Request|Supported   |Supported   |Supported   |
 |7.3.6 Delete PDP Context Response|Supported   |Supported   |Supported   |
 |7.3.7 Error Indication  |Supported   |Supported   |Supported   |
 |7.3.8 PDU Notification Request|Unsupported |Unsupported |Unsupported |
 |7.3.9 PDU Notification Response|Unsupported |Unsupported |Unsupported |
 |7.3.10 PDU Notification Reject Request|Unsupported |Unsupported |Unsupported |
 |7.3.10 PDU Notification Reject Response|Unsupported |Unsupported |Unsupported |
 5+<|*7.4 Location Management Messages*
 |7.4.1 Send Routeing Information for GPRS Request|Unsupported |Unsupported |Not applicable  |
 |7.4.2 Send Routeing Information for GPRS Response|Unsupported |Unsupported |Not applicable  |
 |7.4.3 Failure Report Request|Unsupported |Unsupported |Not applicable|
 |7.4.3 Failure Report Response|Unsupported |Unsupported |Not applicable|
 |7.4.5 Note MS GPRS Present Request|Unsupported |Unsupported |Not applicable|
 |7.4.6 Note MS GPRS Present Response|Unsupported |Unsupported |Not applicable|
 5+<|*7.5 Mobility Management Messages*
 |7.5.1 Identification Request|Unsupported |Not applicable|Not applicable|
 |7.5.2 Identification Response|Unsupported |Not applicable |Not applicable|
 |7.5.3 SGSN Context Request|Unsupported |Not applicable|Not applicable|
 |7.5.4 SGSN Context Response|Unsupported |Not applicable |Not applicable|
 |7.5.5 SGSN Context Acknowledge|Unsupported |Not applicable|Not applicable|
 |7.5.6 Forward Relocation Request|Unsupported |Not applicable|Not applicable|
 |7.5.7 Forward Relocation Response|Unsupported |Not applicable|Not applicable|
 |7.5.8 Forward Relocation Complete|Unsupported |Not applicable|Not applicable|
 |7.5.9 Relocation Cancel Request|Unsupported |Not applicable|Not applicable|
 |7.5.10 Relocation Cancel Response|Unsupported |Not applicable|Not applicable|
 |7.5.11 Forward Relocation Complete     |Unsupported |Not applicable |Not applicable  |
 |7.5.12 Forward SRNS Context Acknowledge|Unsupported |Not applicable|Not applicable|
 |7.5.13 Forward SRNS Context|Unsupported |Not applicable|Not applicable|
 |===
 Notes
 1) The "Secondary PDP Context Activation Procedure" is not supported.
--- a/doc/manuals/chapters/running.adoc
+++ b/doc/manuals/chapters/running.adoc
@@ -0,0 +1,133 @@
 == Running OsmoGGSN
 The OsmoGGSN executable (`osmo-ggsn`) offers the following command-line
 arguments:
 === SYNOPSIS
 *osmo-ggsn* [-h|-V] [-D] [-c 'CONFIGFILE']
 === OPTIONS
 *-h, --help*::
 	Print a short help message about the supported options
 *-V, --version*::
 	Print the compile-time version number of the program
 *-D, --daemonize*::
 	Fork the process as a daemon into background.
 *-c, --config-file 'CONFIGFILE'*::
 	Specify the file and path name of the configuration file to be
 	used. If none is specified, use `osmo-ggsn.cfg` in the current
 	working directory.
 === Routing
 Operating the OpenGGSN tun device naturally creates a network setup with
 multiple interfaces. Consider:
 * Typical Linux setups prevent forwarding of packets between separate
  interfaces by default. To let subscribers reach the internet uplink from the
  tun device, it may be required to enable IP forwarding.
 * Having a locally defined address range assigned to the tun device requires
  either sensible routing for this address range, or that masquerading is
  enabled to allow your single uplink IP address to "proxy" for the tun.
 These are decisions to be made on a network administration level.
 In a trivial case where you have a single box serving GPRS to few subscribers
 on an arbitrary IP address range not known in the larger network, the easiest
 way to enable GPRS uplink would be to enable IP forwarding and masquerading.
 To manually enable IPv4 forwarding and masquerading ad-hoc, you can do:
 ----
 sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
 nft 'add rule ip nat postrouting oifname "\*" counter masquerade'
 ----
 (You may want to replace `*` with the network device name, like `-o eth0`)
 There are various ways to enable these settings persistently, please refer to
 your distribution's documentation -- e.g. look for @net.ipv4.ip_forward=1@ in
@/etc/sysctl.d/@, and https://wiki.debian.org/nftables for masquerading.
 include::{srcdir}/chapters/mtu.adoc[]
 === Multiple instances
 Running multiple instances of `osmo-ggsn` is possible if all GGSN instances
 are binding to different local IP addresses and all other interfaces (VTY,
 CTRL) are separated using the appropriate configuration options. The IP based
 interfaces are binding to local host by default. In order to separate the
 processes, the user has to bind those services to specific but different
 IP addresses.
 The VTY and the control interface can be bound to IP addresses from the loopback
 address range.
 .Example: Binding VTY and control interface to a specific ip-address
 ----
 line vty
 bind 127.0.0.2
 ctrl
 bind 127.0.0.2
 ----
 Also make sure to place each instance's GTP bind on a separate IP address (GTP
 uses a port number that is fixed in the GTP specifications, so it will not be
 possible to pick differing ports on the same IP address), like:
 ----
 ggsn ggsn0
 gtp bind-ip 127.0.0.2
 ----
 === GTP-U kernel module
 WARNING: As of writing, IPv6 support for the kernel module has not been
         upstreamed yet (OS#1952).
 WARNING: As of writing, it is not possible to configure multiple APNs with
         gtpu-mode kernel-gpt. This is a limitation in OsmoGGSN, not in the
         kernel module (OS#6106).
 OsmoGGSN has support to use the Linux kernel GTP-U tunnel driver to accelerate
 the data/user plane while still implementing the control plane (GTP-C) in
 userspace in OsmoGGSN. The kernel module is included in Linux 4.7.0 and higher.
 Notably the Debian GNU/Linux distribution has it enabled by default.
 In order to use this feature, make sure that your Linux kernel was configured
 to support it (`CONFIG_GTP=m` or `=y`). Furthermore, `osmo-ggsn` must have been
 built with `./configure` argument `--enable-gtp-linux` (which requires libgtpnl
 to be installed).
 Load the kernel module with:
 ----
 $ sudo modprobe gtp
 ----
 Then start OsmoGGSN with a configuration file that uses `gtpu-mode kernel-gtp`.
 A full example configuration is in `osmo-ggsn-kernel-gtp.cfg`.
 ----
 $ sudo osmo-ggsn -c /usr/share/doc/osmo-ggsn/examples/osmo-ggsn-kernel-gtp.cfg
 ----
 .Example: APN with kernel-gtp
 ----
 ggsn ggsn0
 gtp state-dir /tmp
 gtp bind-ip 127.0.0.2
 apn internet
  gtpu-mode kernel-gtp
  tun-device tun4
  type-support v4
  ip prefix dynamic 172.16.222.0/24
  ip dns 0 8.8.8.8
  ip dns 1 8.8.4.4
  ip ifconfig 172.16.222.0/24
  no shutdown
 ----
--- a/doc/manuals/osmoggsn-usermanual-docinfo.xml
+++ b/doc/manuals/osmoggsn-usermanual-docinfo.xml
@@ -0,0 +1,46 @@
 <revhistory>
  <revision>
    <revnumber>1</revnumber>
    <date>August 2017</date>
    <authorinitials>HW</authorinitials>
    <revremark>
      Initial version.
    </revremark>
  </revision>
 </revhistory>
 <authorgroup>
  <author>
    <firstname>Harald</firstname>
    <surname>Welte</surname>
    <email>hwelte@sysmocom.de</email>
    <authorinitials>HW</authorinitials>
    <affiliation>
      <shortaffil>sysmocom</shortaffil>
      <orgname>sysmocom - s.f.m.c. GmbH</orgname>
      <jobtitle>Managing Director</jobtitle>
    </affiliation>
  </author>
 </authorgroup>
 <copyright>
  <year>2013-2017</year>
  <holder>sysmocom - s.f.m.c. GmbH</holder>
 </copyright>
 <legalnotice>
  <para>
 	Permission is granted to copy, distribute and/or modify this
 	document under the terms of the GNU Free Documentation License,
 	Version 1.3 or any later version published by the Free Software
 	Foundation; with no Invariant Sections, no Front-Cover Texts,
 	and no Back-Cover Texts.  A copy of the license is included in
 	the section entitled "GNU Free Documentation License".
  </para>
  <para>
 	The Asciidoc source code of this manual can be found at
 	<ulink url="http://git.osmocom.org/osmo-gsm-manuals/">
 		http://git.osmocom.org/osmo-gsm-manuals/
 	</ulink>
  </para>
 </legalnotice>
--- a/doc/manuals/osmoggsn-usermanual.adoc
+++ b/doc/manuals/osmoggsn-usermanual.adoc
@@ -0,0 +1,30 @@
 OsmoGGSN User Manual
 ====================
 Harald Welte <hwelte@sysmocom.de>
 include::./common/chapters/preface.adoc[]
 include::{srcdir}/chapters/overview.adoc[]
 include::{srcdir}/chapters/running.adoc[]
 //include::{srcdir}/chapters/control.adoc[]
 include::{srcdir}/chapters/configuration.adoc[]
 include::./common/chapters/vty.adoc[]
 include::./common/chapters/logging.adoc[]
 include::./common/chapters/control_if.adoc[]
 include::./common/chapters/vty_cpu_sched.adoc[]
 include::./common/chapters/port_numbers.adoc[]
 include::./common/chapters/bibliography.adoc[]
 include::./common/chapters/glossary.adoc[]
 include::./common/chapters/gfdl.adoc[]
--- a/doc/manuals/osmoggsn-vty-reference.xml
+++ b/doc/manuals/osmoggsn-vty-reference.xml
@@ -0,0 +1,38 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
  ex:ts=2:sw=42sts=2:et
  -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 -->
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML 5.0//EN"
 "http://docbook.org/xml/5.0/dtd/docbook.dtd" [
 <!ENTITY chapter-vty      SYSTEM      "./common/chapters/vty.xml" >
 <!ENTITY sections-vty     SYSTEM      "generated/docbook_vty.xml"  >
 ]>
 <book>
  <info>
    <revhistory>
        <revision>
            <revnumber>v1</revnumber>
            <date>06th September 2017</date>
            <authorinitials>hw</authorinitials>
            <revremark>Initial version as of OsmoGGSN v1.0.0</revremark>
        </revision>
    </revhistory>
    <title>OsmoGGSN VTY Reference</title>
    <copyright>
      <year>2017</year>
    </copyright>
    <legalnotice>
      <para>This work is copyright by <orgname>sysmocom - s.f.m.c. GmbH</orgname>. All rights reserved.
      </para>
    </legalnotice>
  </info>
  <!-- Main chapters-->
  &chapter-vty;
 </book>
--- a/doc/manuals/regen_doc.sh
+++ b/doc/manuals/regen_doc.sh
@@ -0,0 +1,17 @@
 #!/bin/sh -x
 if [ -z "$DOCKER_PLAYGROUND" ]; then
 	echo "You need to set DOCKER_PLAYGROUND"
 	exit 1
 fi
 SCRIPT=$(realpath "$0")
 MANUAL_DIR=$(dirname "$SCRIPT")
 COMMIT=${COMMIT:-$(git log -1 --format=format:%H)}
 cd "$DOCKER_PLAYGROUND/scripts" || exit 1
 OSMO_GGSN_BRANCH=$COMMIT ./regen_doc.sh osmo-ggsn 4260 \
 	"$MANUAL_DIR/chapters/counters_generated.adoc" \
 	"$MANUAL_DIR/vty/ggsn_vty_reference.xml"
--- a/doc/manuals/vty/ggsn_vty_additions.xml
+++ b/doc/manuals/vty/ggsn_vty_additions.xml
@@ -0,0 +1,30 @@
 <vtydoc xmlns='urn:osmocom:xml:libosmocore:vty:doc:1.0'>
 	<node id='config-line'>
 		<child_of nodeid='config' />
 		<name>Telnet/VTY Configuration Node</name>
 		<description>
 			Configure parameters of the Telnet/VTY Interface, such as to which IP address it should bind/listen to.
 		</description>
 	</node>
 	<node id='config-ctrl'>
 		<child_of nodeid='config' />
 		<name>CTRL Configuration Node</name>
 		<description>
 			Configure parameters of the CTRL Interface, such as to which IP address it should bind/listen to.
 		</description>
 	</node>
 	<node id='config-ggsn'>
 		<child_of nodeid='config' />
 		<name>GGSN Instance Configuration Node</name>
 		<description>
 			Configure an Instance of a (virtual) GGSN
 		</description>
 	</node>
 	<node id='config-ggsn-apn'>
 		<child_of nodeid='config-ggsn' />
 		<name>APN Configuration Node</name>
 		<description>
 			Configure an Access Point Name (APN) inside a GGSN Instance
 		</description>
 	</node>
 </vtydoc>
--- a/doc/osmo-ggsn.8
+++ b/doc/osmo-ggsn.8
@@ -1,5 +1,5 @@
-.\" * OpenGGSN - Gateway GPRS Support Node
+.\" * OsmoGGSN - Gateway GPRS Support Node
 .\" * Copyright (C) 2002, 2003 Mondru AB.
 .\" * 
 .\" * The contents of this file may be used under the terms of the GNU
@@ -12,57 +12,37 @@
 .\" * 
 .\" * Contributor(s):
 .\" * 
-.\" Manual page for ggsn
+.\" Manual page for osmo-ggsn
 .\" SH section heading
 .\" SS subsection heading
 .\" LP paragraph
 .\" IP indented paragraph
 .\" TP hanging label
-.TH ggsn 8 "July 2003"
+.TH osmo-ggsn 8 "August 2017"
 .SH NAME
-ggsn \- Gateway GPRS Support Node.
+osmo-ggsn \- Gateway GPRS Support Node.
 .SH SYNOPSIS
-.B ggsn
+.B osmo-ggsn
 \-\-help
-.B ggsn
+.B osmo-ggsn
 \-\-version
-.B ggsn
+.B osmo-ggsn
 [
-.BI \-\-fg
+.BI \-\-help
 ] [
-.BI \-\-debug
+.BI \-\-daemonize
 ] [
-.BI \-\-conf " file"
+.BI \-\-config-file " file"
 ] [
-.BI \-\-pidfile " file"
+.BI \-\-version
 ] [
 .BI \-\-statedir " file" 
 ] [ 
 .BI \-\-listen " host" 
 ] [
 .BI \-\-net " net" 
 ] [
 .BI \-\-ipup " script" 
 ] [
 .BI \-\-ipdown " script" 
 ] [
 .BI \-\-dynip " net" 
 ] [
 .BI \-\-statip " net" 
 ] [
 .BI \-\-pcodns1 " host" 
 ] [
 .BI \-\-pcodns2 " host" 
 ] [
 .BI \-\-timelimit " seconds" 
 ]
 .SH DESCRIPTION
-.B ggsn
+.B osmo-ggsn
 is part of the 
-.B OpenGGSN
+.B OsmoGGSN
 project, and implements a Gateway GPRS Support Node. It is used by
 mobile operators as the interface between the Internet and the rest of
 the mobile network infrastructure.
@@ -82,14 +62,14 @@ over IP.
 The other interface can be thought of as the uplink interface, and
 interfaces the GGSN to an external data network. Gi is most often an
 interface to the Internet.
-.B ggsn
+.B osmo-ggsn
 uses the 
 .B TUN/TAP driver
 for the Gi interface. A tun network interface is established when the
-.B ggsn
+.B osmo-ggsn
 is started.
-.B ggsn 
+.B osmo-ggsn 
 will accept incoming connections from mobile stations through the
 radio access network and the SGSN. When a connection request is
 received the ggsn will allocate a dynamic IP address for the mobile
@@ -99,7 +79,7 @@ the SGSN. Runtime errors are reported using the Osmocom logging
 framework.
 Typically 
-.B ggsn
+.B osmo-ggsn
 will be deployed with two Ethernet interfaces. One for the Gn/Gp
 interface, and one for the Gi interface. Policy routing and firewall
 rules should be used in order to separate Gi traffic from Gn/Gp
@@ -115,104 +95,35 @@ Print help and exit.
 Print version and exit.
 .TP
-.BI --fg
+.BI --daemonize
-Run in foreground (default = off)
+Run in background as a daemon (default = off)
 .TP
-.BI --debug
+.BI --config-file " file"
 Run in debug mode (default = off)
 .TP
 .BI --conf " file"
 Read configuration 
 .I file
-(default = /etc/ggsn.conf) where each line corresponds to one command
+(default = ./openggsn.cfg)
 line option, but with the leading '--' removed. Command line options
 override the options given in the configuration file.
 .TP
 .BI --pidfile " file"
 Filename of process id 
 .I file
 (default = /var/run/ggsn.pid)
 .TP
 .BI --statedir " path"
 .I path
 to directory of nonvolatile data (default = /var/lib/ggsn/)
 .TP
 .BI --listen " host"
 Local interface IP address to use for the Gn/Gp interface. This option
 must be specified. For security issues it is not possible to use
 INADDR_ANY.
 .TP
 .BI --net " net"
 Network address of the Gi interface (default = 192.168.0.0/24). The
 network address is set during initialisation when
 .B ggsn
 establishes a tun device for the Gi interface.
 .TP
 .BI --ipup " script"
 Script executed after the Gi tun network interface has been brought
 up.  Executed with the following parameters: <devicename> <ip address>
 .TP
 .BI --ipdown " script"
 Script executed after the Gi tun network interface has been taken
 down.  Executed with the following parameters: <devicename> <ip
 address>
 .TP
 .BI --dynip " net"
 Dynamic IP address pool. Specifies a pool of dynamic IP addresses. If
 this option is omitted the network address specified by the
 .BI --net
 option is used for dynamic IP address allocation.
 .TP
 .BI --pcodns1 " host"
 PCO DNS Server 1 (default = 0.0.0.0). PCO stands for Protocol
 Configuration options, and is part of the GPRS protocols. It is used
 to inform the mobile station about the DNS address to use for host
 name resolution.
 .TP
 .BI --pcodns2 " host"
 PCO DNS Server 2 (default = 0.0.0.0). PCO stands for Protocol
 Configuration options, and is part of the GPRS protocols. It is used
 to inform the mobile station about the DNS address to use for host
 name resolution.
 .TP
 .BI --timelimit " seconds"
 Exit 
 .b ggsn
 after \fIseconds\fP. Used for debugging.
 .SH FILES
-.I /etc/ggsn.conf
+.I ./osmo-ggsn.cfg
 .RS
 The configuration file for
-.B ggsn.
+.B osmo-ggsn.
 .RE
-.I /var/run/ggsn.pid
+.I /var/run/osmo-ggsn.pid
 .RS
 Process ID file.
 .RE
-.I /var/lib/ggsn
+.I /var/lib/osmo-ggsn
 .RS
 Directory holding nonvolatile data.
 .RE
 .SH BUGS
-Report all bugs to the OpenGGSN bug tracking list at 
+Report all bugs to the OsmoGGSN bug tracking list at 
-.I http://sourceforge.net/projects/ggsn/
+.I https://osmocom.org/projects/openggsn
-.B ggsn
+.B osmo-ggsn
 has very limited management support. Currently both SNMP as well as
 billing mechanisms are missing.
@@ -224,13 +135,13 @@ billing mechanisms are missing.
 .LP
 Besides the long options documented in this man page
-.B ggsn
+.B osmo-ggsn
 also accepts a number of short options with the same functionality. Use
-.B ggsn --help
+.B osmo-ggsn --help
 for a full list of all the available options.
 The TUN/TAP driver is required for proper operation of
-.B ggsn. 
+.B osmo-ggsn. 
 For linux kernels later than 2.4.7 the TUN/TAP driver is included in the kernel, but typically needs to be loaded manually with
 .B modprobe tun.
 For automatic loading the line
@@ -241,7 +152,7 @@ For other platforms see
 .I http://vtun.sourceforge.net/tun/
 for information on how to install and configure the tun driver.
-.B ggsn 
+.B osmo-ggsn 
 uses the GPRS Tunneling Protocol (GTP) as specified by the Third
 Generation Partnership Project (3GPP). 3GPP protocols specifications
 can be found at
@@ -250,6 +161,7 @@ can be found at
 .SH COPYRIGHT
 Copyright (C) 2002, 2003 by Mondru AB.
 Copyright (C) 2017 Harald Welte
 The contents of this file may be used under the terms of the GNU
 General Public License Version 2, provided that the above copyright
@@ -258,3 +170,4 @@ substantial portions of the software.
 .SH AUTHORS
 Jens Jakobsen <jj@openggsn.org>
 Harald Welte <laforge@gnumonks.org>
--- a/doc/sgsnemu.8
+++ b/doc/sgsnemu.8
@@ -1,5 +1,5 @@
-.\" * OpenGGSN - Gateway GPRS Support Node
+.\" * OsmoGGSN - Gateway GPRS Support Node
 .\" * Copyright (C) 2002, 2003 Mondru AB.
 .\" * 
 .\" * The contents of this file may be used under the terms of the GNU
@@ -90,7 +90,7 @@ sgsnemu \- Serving GPRS Support Node Emulator
 .SH DESCRIPTION
 .B sgsnemu
 is part of the 
-.B OpenGGSN
+.B OsmoGGSN
 project, and implements a Serving GPRS Support Node (SGSN)
 emulator. It can be used for testing Gateway GPRS Support Nodes
 (GGSNs), GPRS core networks as well as GPRS roaming connections.
@@ -329,7 +329,7 @@ indicates infinite.
 .TP
 .BI --pingquiet
 Do not print information for each packet received (default = off). Is
-quite usefull for high pingrates.
+quite useful for high pingrates.
 .SH FILES
@@ -348,8 +348,8 @@ Directory holding nonvolatile data.
 .RE
 .SH BUGS
-Report all bugs to the OpenGGSN bug tracking list at 
+Report all bugs to the OsmoGGSN bug tracking list at 
-.I http://sourceforge.net/projects/sgsnemu/
+.I http://osmocom.org/projects/openggsn/issues
 .SH "SEE ALSO"
--- a/examples/firewall
+++ b/examples/firewall
@@ -1,48 +0,0 @@
 #!/bin/sh
 #
 # Firewall script for GGSN
 #
 # Uses $IFGN (eth0) as the Gn interface (Gn) and
 # $IFGI (eth1) as the Gi interface.
 #
 # SUMMARY
 # * All connections originating from GGSN are allowed.
 # * Incoming ssh, GTPv0 and GTPv1 is allowed on the Gn interface.
 # * Incoming ssh is allowed on the Gi interface.
 # * Forwarding is allowed to and from the Gi interface, but disallowed
 #   to and from the Gn interface.
 # * Masquerede on Gi interface.
 IPTABLES="/sbin/iptables"
 IFGN="eth0"
 IFGI="eth1"
 $IPTABLES -P INPUT DROP
 $IPTABLES -P FORWARD ACCEPT
 $IPTABLES -P OUTPUT ACCEPT
 #Allow related and established on all interfaces (input)
 $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 #Allow releated, established, GTP and ssh on $IFGN. Reject everything else.
 $IPTABLES -A INPUT -i $IFGN -p tcp -m tcp --dport 22 --syn -j ACCEPT
 $IPTABLES -A INPUT -i $IFGN -p udp -m udp --dport 2123 -j ACCEPT
 $IPTABLES -A INPUT -i $IFGN -p udp -m udp --dport 2152 -j ACCEPT
 $IPTABLES -A INPUT -i $IFGN -p udp -m udp --dport 3386 -j ACCEPT
 $IPTABLES -A INPUT -i $IFGN -j REJECT
 #Allow related, established and ssh. Drop everything else.
 $IPTABLES -A INPUT -i $IFGI -p tcp -m tcp --dport 22 --syn -j ACCEPT
 $IPTABLES -A INPUT -i $IFGI -j DROP
 # Masquerade everything going out on $IFGI
 $IPTABLES -t nat -A POSTROUTING -o $IFGI -j MASQUERADE
 #Allow everything on loopback interface.
 $IPTABLES -A INPUT -i lo -j ACCEPT
 # Drop everything to and from $IFGN (forward)
 $IPTABLES -A FORWARD -i $IFGN -j DROP
 $IPTABLES -A FORWARD -o $IFGN -j DROP
--- a/examples/ggsn.conf
+++ b/examples/ggsn.conf
@@ -1,92 +0,0 @@
 ##############################################################################
 #
 # Sample ggsn configuration file
 #
 ##############################################################################
 # TAG: fg
 # Include this flag if process is to run in the foreground
 #
 #fg
 # TAG: debug
 # Include this flag to include debug information.
 #debug
 # TAG: conf
 # Configuration file to use. This file is the configuration file, 
 # so changing this parameter in the configuration file does not make
 # sense. Use it on the command line instead.
 # TAG: pidfile
 # File to store information about the process id of the program.
 # The program must have write access to this file/directory.
 #pidfile /var/run/ggsn.pid
 # TAG: statedir
 # Directory to use for nonvolatile storage. 
 # The program must have write access to this directory.
 #statedir /var/lib/ggsn/
 # TAG: listen
 # Specifies the local IP address to listen to
 #listen 10.0.0.240
 # TAG: net
 # IP network address of external packet data network
 # Used to set up network interface.
 #net 192.168.0.0/24
 # TAG: ipup
 # Script executed after network interface has been brought up.
 # Executed with the following parameters: <devicename> <ip address>
 #ipup /etc/ggsn/ip-up
 # TAG: ipdown
 # Script executed after network interface has been taken down.
 # Executed with the following parameters: <devicename> <ip address>
 #ipdown /etc/ggsn/ip-down
 # TAG: dynip
 # Dynamic IP address pool.
 # Used for allocation of dynamic IP address when address is not given
 # by HLR.
 # If this option is not given then the net option is used as a substitute.
 #dynip 192.168.0.0/24
 # TAG: statip
 # Use of this tag is currently UNSUPPORTED
 # Static IP address pool.
 # Used for allocation of static IP address by means of HLR.
 #statip 192.168.1.0/24
 # TAG: pcodns1
 # Protocol configuration option domain name system server 1.
 #pcodns1 0.0.0.0
 # TAG: pcodns2
 # Protocol configuration option domain name system server 2.
 #pcodns2 0.0.0.0
 # TAG: timelimit
 # Exit after timelimit seconds.
 # Setting timelimit to zero will cause the program not to exit.
 #timelimit 0
 # TAG: apn
 # Use of this tag is EXPERIMENTAL
 # Access point name to connect to when run in client mode.
 #apn internet
 # TAG: qos
 # Use of this tag is EXPERIMENTAL
 # Requested Quality of Service used when run in client mode.
 # 3 bytes corresponding to ????
 #qos 0x0b921f
--- a/examples/ggsn.init
+++ b/examples/ggsn.init
@@ -1,97 +0,0 @@
 #!/bin/sh
 #
 # ggsn          This shell script takes care of starting and stopping
 #               ggsn.
 #
 # chkconfig: - 65 35
 # description: ggsn is a Gateway GPRS Support Node.
 # Source function library.
 . /etc/rc.d/init.d/functions
 # Source networking configuration.
 . /etc/sysconfig/network
 if [ -f /etc/sysconfig/ggsn ]; then
        . /etc/sysconfig/ggsn
 fi
 # Check that networking is up.
 [ ${NETWORKING} = "no" ] && exit 0
 [ -f /usr/bin/ggsn ] || exit 0
 [ -f /etc/ggsn.conf ] || exit 0
 RETVAL=0
 prog="ggsn"
 start() {
 	# Start daemons.
 	echo -n $"Starting $prog: "
 	# Load tun module
 	/sbin/modprobe tun >/dev/null 2>&1
 	# Enable routing of packets: WARNING!!!
 	# Users should enable this explicitly
 	# echo 1 > /proc/sys/net/ipv4/ip_forward
 	# Check for runtime directory of nonvolatile data
 	if [ ! -d  /var/lib/ggsn ]; then
 	  mkdir /var/lib/ggsn
 	fi
 	# Check for GTP restart counter
 	if [ ! -d  /var/lib/ggsn/gsn_restart ]; then
 	  echo 0 > /var/lib/ggsn/gsn_restart
 	fi
 	daemon /usr/bin/ggsn 
 	RETVAL=$?
 	echo
 	[ $RETVAL -eq 0 ] && touch /var/lock/subsys/ggsn
 	return $RETVAL
 }
 stop() {
 	# Stop daemons.
 	echo -n $"Shutting down $prog: "
 	killproc ggsn
 	RETVAL=$?
 	echo
 	[ $RETVAL = 0 ] && rm -f /var/lock/subsys/ggsn /var/run/ggsn.pid
 	return $RETVAL
 }
 # See how we were called.
 case "$1" in
  start)
 	start
 	;;
  stop)
 	stop
 	;;
  restart|reload)
 	stop
 	start
 	RETVAL=$?
 	;;
  condrestart)
 	if [ -f /var/lock/subsys/ggsn ] ; then
 	    stop
 	    start
 	    RETVAL=$?
 	fi
 	;;
  status)
 	status ggsn
 	RETVAL=$?
 	;;
  *)
 	echo $"Usage: $0 {start|stop|restart|condrestart|status}"
 	exit 1
 esac
 exit $RETVAL
--- a/ggsn/Makefile.am
+++ b/ggsn/Makefile.am
@@ -1,10 +1,24 @@
-bin_PROGRAMS = ggsn
+bin_PROGRAMS = osmo-ggsn
 AM_LDFLAGS = @EXEC_LDFLAGS@
-AM_CFLAGS = -O2 -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+AM_CFLAGS = \
 	    -D_GNU_SOURCE \
 	    -fno-builtin \
 	    -Wall \
 	    -DSBINDIR='"$(sbindir)"' \
 	    -I$(top_srcdir)/include \
 	    $(LIBOSMOCORE_CFLAGS) \
 	    $(LIBOSMOCTRL_CFLAGS) \
 	    $(LIBOSMOVTY_CFLAGS) \
 	    $(NULL)
-ggsn_LDADD = @EXEC_LDADD@ -lgtp -L../gtp ../lib/libmisc.a $(LIBOSMOCORE_LIBS)
+osmo_ggsn_LDADD = @EXEC_LDADD@ -lgtp -L../gtp ../lib/libmisc.a $(LIBOSMOCORE_LIBS) $(LIBOSMOCTRL_LIBS) $(LIBOSMOVTY_LIBS)
 ggsn_DEPENDENCIES = ../gtp/libgtp.la ../lib/libmisc.a
 ggsn_SOURCES = ggsn.c cmdline.c cmdline.h
 if ENABLE_GTP_KERNEL
 AM_CFLAGS += -DGTP_KERNEL $(LIBGTPNL_CFLAGS)
 osmo_ggsn_LDADD += $(LIBGTPNL_LIBS)
 endif
 osmo_ggsn_DEPENDENCIES = ../gtp/libgtp.la ../lib/libmisc.a
 osmo_ggsn_SOURCES = ggsn_main.c ggsn_vty.c ggsn.c ggsn.h sgsn.c sgsn.h pco.c pco.h
--- a/ggsn/cmdline.c
+++ b/ggsn/cmdline.c
--- a/ggsn/cmdline.ggo
+++ b/ggsn/cmdline.ggo
@@ -1,35 +0,0 @@
 # OpenGGSN - Gateway GPRS Support Node
 # Copyright (C) 2002, 2003, 2004 Mondru AB.
 #  
 # The contents of this file may be used under the terms of the GNU
 # General Public License Version 2, provided that the above copyright
 # notice and this permission notice is included in all copies or
 # substantial portions of the software.
 #
 # Use "gengetopt --conf-parser < cmdline.ggo" 
 # to generate cmdline.c and cmdline.h
 option  "fg"          f "Run in foreground"             flag   off
 option  "debug"       d "Run in debug mode"             flag   off
 option  "conf"        c "Read configuration file"       string default="/etc/ggsn.conf" no
 option  "pidfile"     - "Filename of process id file"   string default="/var/run/ggsn.pid" no
 option  "statedir"    - "Directory of nonvolatile data" string default="/var/lib/ggsn/" no
 option  "listen"      l "Local interface"               string no
 option  "net"         n "Network"                       string default="192.168.0.0/24" no
 option  "ipup"        - "Script to run after link-up"    string no
 option  "ipdown"      - "Script to run after link-down"  string no
 option  "dynip"       - "Dynamic IP address pool"       string no
 option  "statip"      - "Static IP address pool"        string no
 option  "pcodns1"     - "PCO DNS Server 1"              string default="0.0.0.0" no
 option  "pcodns2"     - "PCO DNS Server 2"              string default="0.0.0.0" no
 option  "timelimit"   - "Exit after timelimit seconds"  int default="0" no
 option  "apn"         a "Access point name"             string default="internet" no
 option  "qos"         q "Requested quality of service"  int    default="0x0b921f" no
 option  "logfile"     - "Logfile for errors"            string no
 option  "loglevel"    - "Global log ldevel"		string default="error" no
--- a/ggsn/cmdline.h
+++ b/ggsn/cmdline.h
@@ -1,272 +0,0 @@
 /** @file cmdline.h
 *  @brief The header file for the command line option parser
 *  generated by GNU Gengetopt version 2.22.6
 *  http://www.gnu.org/software/gengetopt.
 *  DO NOT modify this file, since it can be overwritten
 *  @author GNU Gengetopt by Lorenzo Bettini */
 #ifndef CMDLINE_H
 #define CMDLINE_H
 /* If we use autoconf.  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #include <stdio.h> /* for FILE */
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #ifndef CMDLINE_PARSER_PACKAGE
 /** @brief the program name (used for printing errors) */
 #define CMDLINE_PARSER_PACKAGE PACKAGE
 #endif
 #ifndef CMDLINE_PARSER_PACKAGE_NAME
 /** @brief the complete program name (used for help and version) */
 #ifdef PACKAGE_NAME
 #define CMDLINE_PARSER_PACKAGE_NAME PACKAGE_NAME
 #else
 #define CMDLINE_PARSER_PACKAGE_NAME PACKAGE
 #endif
 #endif
 #ifndef CMDLINE_PARSER_VERSION
 /** @brief the program version */
 #define CMDLINE_PARSER_VERSION VERSION
 #endif
 /** @brief Where the command line options are stored */
 struct gengetopt_args_info
 {
  const char *help_help; /**< @brief Print help and exit help description.  */
  const char *version_help; /**< @brief Print version and exit help description.  */
  int fg_flag;	/**< @brief Run in foreground (default=off).  */
  const char *fg_help; /**< @brief Run in foreground help description.  */
  int debug_flag;	/**< @brief Run in debug mode (default=off).  */
  const char *debug_help; /**< @brief Run in debug mode help description.  */
  char * conf_arg;	/**< @brief Read configuration file (default='/etc/ggsn.conf').  */
  char * conf_orig;	/**< @brief Read configuration file original value given at command line.  */
  const char *conf_help; /**< @brief Read configuration file help description.  */
  char * pidfile_arg;	/**< @brief Filename of process id file (default='/var/run/ggsn.pid').  */
  char * pidfile_orig;	/**< @brief Filename of process id file original value given at command line.  */
  const char *pidfile_help; /**< @brief Filename of process id file help description.  */
  char * statedir_arg;	/**< @brief Directory of nonvolatile data (default='/var/lib/ggsn/').  */
  char * statedir_orig;	/**< @brief Directory of nonvolatile data original value given at command line.  */
  const char *statedir_help; /**< @brief Directory of nonvolatile data help description.  */
  char * listen_arg;	/**< @brief Local interface.  */
  char * listen_orig;	/**< @brief Local interface original value given at command line.  */
  const char *listen_help; /**< @brief Local interface help description.  */
  char * net_arg;	/**< @brief Network (default='192.168.0.0/24').  */
  char * net_orig;	/**< @brief Network original value given at command line.  */
  const char *net_help; /**< @brief Network help description.  */
  char * ipup_arg;	/**< @brief Script to run after link-up.  */
  char * ipup_orig;	/**< @brief Script to run after link-up original value given at command line.  */
  const char *ipup_help; /**< @brief Script to run after link-up help description.  */
  char * ipdown_arg;	/**< @brief Script to run after link-down.  */
  char * ipdown_orig;	/**< @brief Script to run after link-down original value given at command line.  */
  const char *ipdown_help; /**< @brief Script to run after link-down help description.  */
  char * dynip_arg;	/**< @brief Dynamic IP address pool.  */
  char * dynip_orig;	/**< @brief Dynamic IP address pool original value given at command line.  */
  const char *dynip_help; /**< @brief Dynamic IP address pool help description.  */
  char * statip_arg;	/**< @brief Static IP address pool.  */
  char * statip_orig;	/**< @brief Static IP address pool original value given at command line.  */
  const char *statip_help; /**< @brief Static IP address pool help description.  */
  char * pcodns1_arg;	/**< @brief PCO DNS Server 1 (default='0.0.0.0').  */
  char * pcodns1_orig;	/**< @brief PCO DNS Server 1 original value given at command line.  */
  const char *pcodns1_help; /**< @brief PCO DNS Server 1 help description.  */
  char * pcodns2_arg;	/**< @brief PCO DNS Server 2 (default='0.0.0.0').  */
  char * pcodns2_orig;	/**< @brief PCO DNS Server 2 original value given at command line.  */
  const char *pcodns2_help; /**< @brief PCO DNS Server 2 help description.  */
  int timelimit_arg;	/**< @brief Exit after timelimit seconds (default='0').  */
  char * timelimit_orig;	/**< @brief Exit after timelimit seconds original value given at command line.  */
  const char *timelimit_help; /**< @brief Exit after timelimit seconds help description.  */
  char * apn_arg;	/**< @brief Access point name (default='internet').  */
  char * apn_orig;	/**< @brief Access point name original value given at command line.  */
  const char *apn_help; /**< @brief Access point name help description.  */
  int qos_arg;	/**< @brief Requested quality of service (default='0x0b921f').  */
  char * qos_orig;	/**< @brief Requested quality of service original value given at command line.  */
  const char *qos_help; /**< @brief Requested quality of service help description.  */
  char * logfile_arg;	/**< @brief Logfile for errors.  */
  char * logfile_orig;	/**< @brief Logfile for errors original value given at command line.  */
  const char *logfile_help; /**< @brief Logfile for errors help description.  */
  char * loglevel_arg;	/**< @brief Global log ldevel (default='error').  */
  char * loglevel_orig;	/**< @brief Global log ldevel original value given at command line.  */
  const char *loglevel_help; /**< @brief Global log ldevel help description.  */
  unsigned int help_given ;	/**< @brief Whether help was given.  */
  unsigned int version_given ;	/**< @brief Whether version was given.  */
  unsigned int fg_given ;	/**< @brief Whether fg was given.  */
  unsigned int debug_given ;	/**< @brief Whether debug was given.  */
  unsigned int conf_given ;	/**< @brief Whether conf was given.  */
  unsigned int pidfile_given ;	/**< @brief Whether pidfile was given.  */
  unsigned int statedir_given ;	/**< @brief Whether statedir was given.  */
  unsigned int listen_given ;	/**< @brief Whether listen was given.  */
  unsigned int net_given ;	/**< @brief Whether net was given.  */
  unsigned int ipup_given ;	/**< @brief Whether ipup was given.  */
  unsigned int ipdown_given ;	/**< @brief Whether ipdown was given.  */
  unsigned int dynip_given ;	/**< @brief Whether dynip was given.  */
  unsigned int statip_given ;	/**< @brief Whether statip was given.  */
  unsigned int pcodns1_given ;	/**< @brief Whether pcodns1 was given.  */
  unsigned int pcodns2_given ;	/**< @brief Whether pcodns2 was given.  */
  unsigned int timelimit_given ;	/**< @brief Whether timelimit was given.  */
  unsigned int apn_given ;	/**< @brief Whether apn was given.  */
  unsigned int qos_given ;	/**< @brief Whether qos was given.  */
  unsigned int logfile_given ;	/**< @brief Whether logfile was given.  */
  unsigned int loglevel_given ;	/**< @brief Whether loglevel was given.  */
 } ;
 /** @brief The additional parameters to pass to parser functions */
 struct cmdline_parser_params
 {
  int override; /**< @brief whether to override possibly already present options (default 0) */
  int initialize; /**< @brief whether to initialize the option structure gengetopt_args_info (default 1) */
  int check_required; /**< @brief whether to check that all required options were provided (default 1) */
  int check_ambiguity; /**< @brief whether to check for options already specified in the option structure gengetopt_args_info (default 0) */
  int print_errors; /**< @brief whether getopt_long should print an error message for a bad option (default 1) */
 } ;
 /** @brief the purpose string of the program */
 extern const char *gengetopt_args_info_purpose;
 /** @brief the usage string of the program */
 extern const char *gengetopt_args_info_usage;
 /** @brief the description string of the program */
 extern const char *gengetopt_args_info_description;
 /** @brief all the lines making the help output */
 extern const char *gengetopt_args_info_help[];
 /**
 * The command line parser
 * @param argc the number of command line options
 * @param argv the command line options
 * @param args_info the structure where option information will be stored
 * @return 0 if everything went fine, NON 0 if an error took place
 */
 int cmdline_parser (int argc, char **argv,
  struct gengetopt_args_info *args_info);
 /**
 * The command line parser (version with additional parameters - deprecated)
 * @param argc the number of command line options
 * @param argv the command line options
 * @param args_info the structure where option information will be stored
 * @param override whether to override possibly already present options
 * @param initialize whether to initialize the option structure my_args_info
 * @param check_required whether to check that all required options were provided
 * @return 0 if everything went fine, NON 0 if an error took place
 * @deprecated use cmdline_parser_ext() instead
 */
 int cmdline_parser2 (int argc, char **argv,
  struct gengetopt_args_info *args_info,
  int override, int initialize, int check_required);
 /**
 * The command line parser (version with additional parameters)
 * @param argc the number of command line options
 * @param argv the command line options
 * @param args_info the structure where option information will be stored
 * @param params additional parameters for the parser
 * @return 0 if everything went fine, NON 0 if an error took place
 */
 int cmdline_parser_ext (int argc, char **argv,
  struct gengetopt_args_info *args_info,
  struct cmdline_parser_params *params);
 /**
 * Save the contents of the option struct into an already open FILE stream.
 * @param outfile the stream where to dump options
 * @param args_info the option struct to dump
 * @return 0 if everything went fine, NON 0 if an error took place
 */
 int cmdline_parser_dump(FILE *outfile,
  struct gengetopt_args_info *args_info);
 /**
 * Save the contents of the option struct into a (text) file.
 * This file can be read by the config file parser (if generated by gengetopt)
 * @param filename the file where to save
 * @param args_info the option struct to save
 * @return 0 if everything went fine, NON 0 if an error took place
 */
 int cmdline_parser_file_save(const char *filename,
  struct gengetopt_args_info *args_info);
 /**
 * Print the help
 */
 void cmdline_parser_print_help(void);
 /**
 * Print the version
 */
 void cmdline_parser_print_version(void);
 /**
 * Initializes all the fields a cmdline_parser_params structure 
 * to their default values
 * @param params the structure to initialize
 */
 void cmdline_parser_params_init(struct cmdline_parser_params *params);
 /**
 * Allocates dynamically a cmdline_parser_params structure and initializes
 * all its fields to their default values
 * @return the created and initialized cmdline_parser_params structure
 */
 struct cmdline_parser_params *cmdline_parser_params_create(void);
 /**
 * Initializes the passed gengetopt_args_info structure's fields
 * (also set default values for options that have a default)
 * @param args_info the structure to initialize
 */
 void cmdline_parser_init (struct gengetopt_args_info *args_info);
 /**
 * Deallocates the string fields of the gengetopt_args_info structure
 * (but does not deallocate the structure itself)
 * @param args_info the structure to deallocate
 */
 void cmdline_parser_free (struct gengetopt_args_info *args_info);
 /**
 * The config file parser (deprecated version)
 * @param filename the name of the config file
 * @param args_info the structure where option information will be stored
 * @param override whether to override possibly already present options
 * @param initialize whether to initialize the option structure my_args_info
 * @param check_required whether to check that all required options were provided
 * @return 0 if everything went fine, NON 0 if an error took place
 * @deprecated use cmdline_parser_config_file() instead
 */
 int cmdline_parser_configfile (const char *filename,
  struct gengetopt_args_info *args_info,
  int override, int initialize, int check_required);
 /**
 * The config file parser
 * @param filename the name of the config file
 * @param args_info the structure where option information will be stored
 * @param params additional parameters for the parser
 * @return 0 if everything went fine, NON 0 if an error took place
 */
 int cmdline_parser_config_file (const char *filename,
  struct gengetopt_args_info *args_info,
  struct cmdline_parser_params *params);
 /**
 * Checks that all the required options were specified
 * @param args_info the structure to check
 * @param prog_name the name of the program that will be used to print
 *   possible errors
 * @return
 */
 int cmdline_parser_required (struct gengetopt_args_info *args_info,
  const char *prog_name);
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
 #endif /* CMDLINE_H */
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
--- a/ggsn/ggsn.h
+++ b/ggsn/ggsn.h
@@ -0,0 +1,187 @@
 #pragma once
 #include <stdint.h>
 #include <stdbool.h>
 #include <osmocom/core/utils.h>
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/select.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/tdef.h>
 #include <osmocom/ctrl/control_if.h>
 #include <osmocom/gtp/gtp.h>
 #include "../lib/tun.h"
 #include "../lib/ippool.h"
 #include "../lib/syserr.h"
 #include "../lib/in46_addr.h"
 #include "sgsn.h"
 #define APN_TYPE_IPv4	0x01	/* v4-only */
 #define APN_TYPE_IPv6	0x02	/* v6-only */
 #define APN_TYPE_IPv4v6	0x04	/* v4v6 dual-stack */
 /* The maximum sane MTU over GTP-U somebody may wish to configure:
 * 9000 bytes aka jumbo frames. */
 #define MAX_POSSIBLE_APN_MTU 9000
 /* See 3GPP TS 23.060 Annex C: */
 #define ETHERNET_MTU      1500
 #define IPV4_HDR_MAX_SIZE 60
 #define IPV6_HDR_MAX_SIZE 40 /* Assume no extension headers in general... */
 #define UDP_HDR_MAX_SIZE  8
 #define GTPU_HDR_MAX_SIZE 12 /* Assume no extension headers in general... */
 #define MAX_DESIRED_APN_MTU ((ETHERNET_MTU) - (GTPU_HDR_MAX_SIZE) - (UDP_HDR_MAX_SIZE) - (IPV4_HDR_MAX_SIZE))
 /* MAX_DESIRED_APN_MTU = 1500 - 60 - 8 - 12 = 1500 - 80 = 1420 */
 struct ggsn_ctx;
 struct apn_ctx_ip {
 	struct {
 		struct in46_prefix ifconfig_prefix;
 		struct in46_prefix ll_prefix;
 		struct in46_prefix static_prefix;
 		struct in46_prefix dynamic_prefix;
 		/* v4 DNS server names */
 		struct in46_addr dns[2];
 	} cfg;
 	/* v4 address pool */
 	struct ippool_t *pool;
 };
 struct apn_name {
 	struct llist_head list;
 	char *name;
 };
 enum apn_gtpu_mode {
 	APN_GTPU_MODE_TUN = 0,		/* default */
 	APN_GTPU_MODE_KERNEL_GTP,
 };
 struct apn_ctx {
 	/* list of APNs inside GGSN */
 	struct llist_head list;
 	/* back-pointer to GGSN */
 	struct ggsn_ctx *ggsn;
 	bool started;
 	struct {
 		/* Primary name */
 		char *name;
 		/* Description string */
 		char *description;
 		/* List of secondary APN names */
 		struct llist_head name_list;
 		/* types supported address types on this APN */
 		uint32_t apn_type_mask;
 		/* GTP-U via TUN device or in Linux kernel */
 		enum apn_gtpu_mode gtpu_mode;
 		/* administratively shut down (true) or not (false) */
 		bool shutdown;
 		/* transmit G-PDU sequence numbers (true) or not (false) */
 		bool tx_gpdu_seq;
 		/* MTU announced to the UE */
 		uint16_t mtu;
 	} cfg;
 	/* corresponding tun device */
 	struct {
 		struct {
 			/* name of the network device */
 			char *dev_name;
 			/* ip-up and ip-down script names/paths */
 			char *ipup_script;
 			char *ipdown_script;
 			/* Whether to apply the MTU (apn->cfg.mtu) on the tun device: */
 			bool mtu_apply;
 		} cfg;
 		struct tun_t *tun;
 	} tun;
 	/* ipv6 link-local address */
 	struct in6_addr v6_lladdr;
 	struct apn_ctx_ip v4;
 	struct apn_ctx_ip v6;
 };
 struct pdp_priv_t {
 	struct pdp_t *lib; /* pointer to libgtp associated pdp_t instance */
 	struct sgsn_peer *sgsn;
 	struct apn_ctx *apn;
 	struct llist_head entry; /* to be included into sgsn_peer */
 	/* struct ggsn_ctx can be reached through lib->gsn->priv, or through sgsn->ggsn */
 };
 struct ggsn_ctx {
 	/* global list of GGSNs */
 	struct llist_head list;
 	/* list of APNs in this GGSN */
 	struct llist_head apn_list;
 	/* list of SGSN peers (struct sgsn_peer) in this GGSN. TODO: hash table with key <ip+port>? */
 	struct llist_head sgsn_list;
 	bool started;
 	struct {
 		char *name;
 		/* Description string */
 		char *description;
 		/* an APN that shall be used as default for any non-matching APN */
 		struct apn_ctx *default_apn;
 		/* ADdress to which we listen for GTP */
 		struct in46_addr listen_addr;
 		/* Local GTP-C address advertised in GTP */
 		struct in46_addr gtpc_addr;
 		/* Local GTP-U address advertised in GTP */
 		struct in46_addr gtpu_addr;
 		/* directory for state file */
 		char *state_dir;
 		/* Time between Echo requests on each SGSN */
 		unsigned int echo_interval;
 		/* administratively shut down (true) or not (false) */
 		bool shutdown;
 	} cfg;
 	/* The libgtp (G)GSN instance, i.e. what listens to GTP */
 	struct gsn_t *gsn;
 	/* osmo-fd for gsn */
 	struct osmo_fd gtp_fd0;
 	struct osmo_fd gtp_fd1c;
 	struct osmo_fd gtp_fd1u;
 };
 /* ggsn_vty.c */
 extern struct llist_head g_ggsn_list;
 extern struct vty_app_info g_vty_info;
 extern int ggsn_vty_init(void);
 struct ggsn_ctx *ggsn_find(const char *name);
 struct ggsn_ctx *ggsn_find_or_create(void *ctx, const char *name);
 struct apn_ctx *ggsn_find_apn(struct ggsn_ctx *ggsn, const char *name);
 struct apn_ctx *ggsn_find_or_create_apn(struct ggsn_ctx *ggsn, const char *name);
 /* ggsn_main.c */
 extern struct ctrl_handle *g_ctrlh;
 extern void *tall_ggsn_ctx;
 extern struct osmo_tdef_group ggsn_tdef_group[];
 /* ggsn.c */
 extern int ggsn_start(struct ggsn_ctx *ggsn);
 extern int ggsn_stop(struct ggsn_ctx *ggsn);
 extern int apn_start(struct apn_ctx *apn);
 extern int apn_stop(struct apn_ctx *apn);
 void ggsn_close_one_pdp(struct pdp_t *pdp);
 #define LOGPAPN(level, apn, fmt, args...)			\
 	LOGP(DGGSN, level, "APN(%s): " fmt, (apn)->cfg.name, ## args)
 #define LOGPGGSN(level, ggsn, fmt, args...)			\
 	LOGP(DGGSN, level, "GGSN(%s): " fmt, (ggsn)->cfg.name, ## args)
 #define LOGPPDP(level, pdp, fmt, args...) LOGPDPX(DGGSN, level, pdp, fmt, ## args)
--- a/ggsn/ggsn_main.c
+++ b/ggsn/ggsn_main.c
@@ -0,0 +1,261 @@
 /*
 * OsmoGGSN - Gateway GPRS Support Node
 * Copyright (C) 2002, 2003, 2004 Mondru AB.
 * Copyright (C) 2017-2019 by Harald Welte <laforge@gnumonks.org>
 * Copyright (C) 2019 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
 *
 * The contents of this file may be used under the terms of the GNU
 * General Public License Version 2, provided that the above copyright
 * notice and this permission notice is included in all copies or
 * substantial portions of the software.
 *
 */
 #include "../config.h"
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <getopt.h>
 #include <ctype.h>
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <inttypes.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <osmocom/core/application.h>
 #include <osmocom/core/select.h>
 #include <osmocom/core/stats.h>
 #include <osmocom/core/rate_ctr.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/tdef.h>
 #include <osmocom/core/utils.h>
 #include <osmocom/ctrl/control_if.h>
 #include <osmocom/ctrl/control_cmd.h>
 #include <osmocom/ctrl/control_vty.h>
 #include <osmocom/ctrl/ports.h>
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 #include <osmocom/vty/stats.h>
 #include <osmocom/vty/ports.h>
 #include <osmocom/vty/command.h>
 #include <osmocom/vty/misc.h>
 #include <osmocom/vty/cpu_sched_vty.h>
 #include "ggsn.h"
 void *tall_ggsn_ctx;
 static int end = 0;
 static int daemonize = 0;
 struct ctrl_handle *g_ctrlh;
 struct ul255_t qos;
 struct ul255_t apn;
 static char *config_file = "osmo-ggsn.cfg";
 struct osmo_tdef_group ggsn_tdef_group[] = {
 	{.name = "gtp", .tdefs = gtp_T_defs, .desc = "GTP (libgtp) timers" },
 	{ }
 };
 /* To exit gracefully. Used with GCC compilation flag -pg and gprof */
 static void signal_handler(int s)
 {
 	LOGP(DGGSN, LOGL_NOTICE, "signal %d received\n", s);
 	switch (s) {
 	case SIGINT:
 	case SIGTERM:
 		LOGP(DGGSN, LOGL_NOTICE, "SIGINT received, shutting down\n");
 		end = 1;
 		break;
 	case SIGABRT:
 		/* in case of abort, we want to obtain a talloc report and
 		 * then run default SIGABRT handler, who will generate coredump
 		 * and abort the process. abort() should do this for us after we
 		 * return, but program wouldn't exit if an external SIGABRT is
 		 * received.
 		 */
 		talloc_report(tall_vty_ctx, stderr);
 		talloc_report_full(tall_ggsn_ctx, stderr);
 		signal(SIGABRT, SIG_DFL);
 		raise(SIGABRT);
 		break;
 	case SIGUSR1:
 		talloc_report(tall_vty_ctx, stderr);
 		talloc_report_full(tall_ggsn_ctx, stderr);
 		break;
 	case SIGUSR2:
 		talloc_report_full(tall_vty_ctx, stderr);
 		break;
 	default:
 		break;
 	}
 }
 static void print_usage()
 {
 	printf("Usage: osmo-ggsn [-h] [-D] [-c configfile] [-V]\n");
 }
 static void print_help()
 {
 	printf(	"  Some useful help...\n"
 		"  -h --help		This help text\n"
 		"  -D --daemonize	Fork the process into a background daemon\n"
 		"  -c --config-file	filename The config file to use\n"
 		"  -V --version		Print the version of OsmoGGSN\n"
 		);
 	printf("\nVTY reference generation:\n");
 	printf("     --vty-ref-mode MODE        VTY reference generation mode (e.g. 'expert').\n");
 	printf("     --vty-ref-xml              Generate the VTY reference XML output and exit.\n");
 }
 static void handle_long_options(const char *prog_name, const int long_option)
 {
 	static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT;
 	switch (long_option) {
 	case 1:
 		vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg);
 		if (vty_ref_mode < 0) {
 			fprintf(stderr, "%s: Unknown VTY reference generation "
 				"mode '%s'\n", prog_name, optarg);
 			exit(2);
 		}
 		break;
 	case 2:
 		fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n",
 			get_value_string(vty_ref_gen_mode_names, vty_ref_mode),
 			get_value_string(vty_ref_gen_mode_desc, vty_ref_mode));
 		vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode);
 		exit(0);
 	default:
 		fprintf(stderr, "%s: error parsing cmdline options\n", prog_name);
 		exit(2);
 	}
 }
 static void handle_options(int argc, char **argv)
 {
 	while (1) {
 		int option_index = 0, c;
 		static int long_option = 0;
 		static struct option long_options[] = {
 			{ "help", 0, 0, 'h' },
 			{ "daemonize", 0, 0, 'D' },
 			{ "config-file", 1, 0, 'c' },
 			{ "version", 0, 0, 'V' },
 			{ "vty-ref-mode", 1, &long_option, 1 },
 			{ "vty-ref-xml", 0, &long_option, 2 },
 			{ 0, 0, 0, 0 }
 		};
 		c = getopt_long(argc, argv, "hdc:V", long_options, &option_index);
 		if (c == -1)
 			break;
 		switch (c) {
 		case 0:
 			handle_long_options(argv[0], long_option);
 			break;
 		case 'h':
 			print_usage();
 			print_help();
 			exit(0);
 		case 'D':
 			daemonize = 1;
 			break;
 		case 'c':
 			config_file = optarg;
 			break;
 		case 'V':
 			print_version(1);
 			exit(0);
 			break;
 		}
 	}
 }
 int main(int argc, char **argv)
 {
 	struct ggsn_ctx *ggsn;
 	int rc;
 	tall_ggsn_ctx = talloc_named_const(NULL, 0, "OsmoGGSN");
 	msgb_talloc_ctx_init(tall_ggsn_ctx, 0);
 	g_vty_info.tall_ctx = tall_ggsn_ctx;
 	/* Handle keyboard interrupt SIGINT */
 	signal(SIGINT, &signal_handler);
 	signal(SIGTERM, &signal_handler);
 	signal(SIGABRT, &signal_handler);
 	signal(SIGUSR1, &signal_handler);
 	signal(SIGUSR2, &signal_handler);
 	osmo_init_ignore_signals();
 	osmo_init_logging2(tall_ggsn_ctx, &log_info);
 	osmo_stats_init(tall_ggsn_ctx);
 	vty_init(&g_vty_info);
 	logging_vty_add_cmds();
 	osmo_talloc_vty_add_cmds();
 	osmo_stats_vty_add_cmds();
 	ggsn_vty_init();
 	ctrl_vty_init(tall_ggsn_ctx);
 	osmo_cpu_sched_vty_init(tall_ggsn_ctx);
 	handle_options(argc, argv);
 	rate_ctr_init(tall_ggsn_ctx);
 	rc = vty_read_config_file(config_file, NULL);
 	if (rc < 0) {
 		fprintf(stderr, "Failed to open config file: '%s'\n", config_file);
 		exit(2);
 	}
 	rc = telnet_init_default(tall_ggsn_ctx, NULL, OSMO_VTY_PORT_GGSN);
 	if (rc < 0)
 		exit(1);
 	g_ctrlh = ctrl_interface_setup(NULL, OSMO_CTRL_PORT_GGSN, NULL);
 	if (!g_ctrlh) {
 		LOGP(DGGSN, LOGL_ERROR, "Failed to create CTRL interface.\n");
 		exit(1);
 	}
 	if (daemonize) {
 		rc = osmo_daemonize();
 		if (rc < 0) {
 			perror("Error during daemonize");
 			exit(1);
 		}
 	}
 #if 0
 	/* qos                                                             */
 	qos.l = 3;
 	qos.v[2] = (args_info.qos_arg) & 0xff;
 	qos.v[1] = ((args_info.qos_arg) >> 8) & 0xff;
 	qos.v[0] = ((args_info.qos_arg) >> 16) & 0xff;
 #endif
 	/* Main select loop */
 	while (!end) {
 		osmo_select_main(0);
 	}
 	llist_for_each_entry(ggsn, &g_ggsn_list, list)
 		ggsn_stop(ggsn);
 	return 0;
 }
--- a/ggsn/ggsn_vty.c
+++ b/ggsn/ggsn_vty.c
--- a/ggsn/pco.c
+++ b/ggsn/pco.c
@@ -0,0 +1,263 @@
 /*
 * PCO parsing related code
 * Copyright (C) 2002, 2003, 2004 Mondru AB.
 * Copyright (C) 2017-2019 by Harald Welte <laforge@gnumonks.org>
 * Copyright (C) 2019 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
 *
 * The contents of this file may be used under the terms of the GNU
 * General Public License Version 2, provided that the above copyright
 * notice and this permission notice is included in all copies or
 * substantial portions of the software.
 *
 */
 #include <unistd.h>
 #include <string.h>
 #include <osmocom/core/msgb.h>
 #include <osmocom/gsm/tlv.h>
 #include "../lib/util.h"
 #include "pco.h"
 #include "ggsn.h"
 /* determine if IPCP contains given option */
 static const uint8_t *ipcp_contains_option(const struct ipcp_hdr *ipcp, size_t ipcp_len,
 					   enum ipcp_options opt, size_t opt_minlen)
 {
 	const uint8_t *cur_opt = ipcp->options;
 	/* iterate over Options and check if protocol contained */
 	while (cur_opt + sizeof(struct ipcp_option_hdr) <= (uint8_t*)ipcp + ipcp_len) {
 		const struct ipcp_option_hdr *cur_opt_hdr = (const struct ipcp_option_hdr *)cur_opt;
 		/* length value includes 2 bytes type/length */
 		if (cur_opt_hdr->len < sizeof(struct ipcp_option_hdr))
 			return NULL;
 		if (cur_opt_hdr->type == opt &&
 		    cur_opt_hdr->len >= sizeof(struct ipcp_option_hdr) + opt_minlen)
 			return cur_opt;
 		cur_opt += cur_opt_hdr->len;
 	}
 	return NULL;
 }
 static const char *pap_welcome = "Welcome to OsmoGGSN " PACKAGE_VERSION;
 /* Handle PAP protocol according to RFC 1334 */
 static void process_pco_element_pap(const struct pco_element *pco_in, struct msgb *resp,
 				    const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	const struct pap_element *pap_in = (const struct pap_element *) pco_in->data;
 	uint16_t pap_in_len;
 	uint8_t peer_id_len;
 	const uint8_t *peer_id;
 	unsigned int pap_welcome_len;
 	uint8_t pap_out_size;
 	struct pap_element *pap_out;
 	if (pco_in->length < sizeof(struct pap_element))
 		goto ret_broken;
 	pap_in_len = osmo_load16be(&pap_in->len);
 	if (pco_in->length < pap_in_len)
 		goto ret_broken;
 	/* "pco_in->length > pap_in_len" is allowed: RFC1334 2.2 states:
 	   "Octets outside the range of the Length field should be treated as
 	   Data Link Layer padding and should be ignored on reception."
 	 */
 	switch (pap_in->code) {
 	case PAP_CODE_AUTH_REQ:
 		if (pap_in_len < sizeof(struct pap_element) + 1)
 			goto ret_broken_auth;
 		peer_id_len = pap_in->data[0];
 		if (pap_in_len < sizeof(struct pap_element) + 1 + peer_id_len)
 			goto ret_broken_auth;
 		peer_id = &pap_in->data[1];
 		LOGPPDP(LOGL_DEBUG, pdp, "PCO PAP PeerId = %s, ACKing\n",
 			osmo_quote_str((const char *)peer_id, peer_id_len));
 		/* Password-Length + Password following here, but we don't care */
 		/* Prepare response, we ACK all of them: */
 		pap_welcome_len = strlen(pap_welcome);
 		/* +1: Length field of pap_welcome Message */
 		pap_out_size = sizeof(struct pap_element) + 1 + pap_welcome_len;
 		pap_out = alloca(pap_out_size);
 		pap_out->code = PAP_CODE_AUTH_ACK;
 		pap_out->id = pap_in->id;
 		pap_out->len = htons(pap_out_size);
 		pap_out->data[0] = pap_welcome_len;
 		memcpy(pap_out->data+1, pap_welcome, pap_welcome_len);
 		msgb_t16lv_put(resp, PCO_P_PAP, pap_out_size, (uint8_t *) pap_out);
 		break;
 	case PAP_CODE_AUTH_ACK:
 	case PAP_CODE_AUTH_NAK:
 	default:
 		LOGPPDP(LOGL_NOTICE, pdp, "Unsupported PAP PCO Code %u, ignoring\n", pap_in->code);
 		break;
 	}
 	return;
 ret_broken_auth:
 	LOGPPDP(LOGL_NOTICE, pdp, "Invalid PAP AuthenticateReq: %s, ignoring\n",
 		osmo_hexdump_nospc((const uint8_t *)pco_in, pco_in->length));
 	return;
 ret_broken:
 	LOGPPDP(LOGL_NOTICE, pdp, "Invalid PAP PCO Length: %s, ignoring\n",
 		osmo_hexdump_nospc((const uint8_t *)pco_in, pco_in->length));
 }
 /* Handle IP Control Protocol, RFC 1332, extensions in RFC 1877 */
 static void process_pco_element_ipcp(const struct pco_element *pco_elem, struct msgb *resp,
 				     const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	struct ippoolm_t *peer_v4 = pdp_get_peer_ipv(pdp, false);
 	const struct in46_addr *dns1 = &apn->v4.cfg.dns[0];
 	const struct in46_addr *dns2 = &apn->v4.cfg.dns[1];
 	uint8_t *start = resp->tail;
 	const struct ipcp_hdr *ipcp;
 	uint16_t ipcp_len;
 	uint8_t *len1, *len2;
 	unsigned int len_appended;
 	ptrdiff_t consumed;
 	size_t remain;
 	if (!peer_v4) {
 		LOGPPDP(LOGL_ERROR, pdp, "IPCP but no IPv4 type ?!?\n");
 		return;
 	}
 	ipcp = (const struct ipcp_hdr *)pco_elem->data;
 	consumed = (pco_elem->data - &pdp->pco_req.v[0]);
 	remain = sizeof(pdp->pco_req.v) - consumed;
 	ipcp_len = osmo_load16be(&ipcp->len);
 	if (remain < 0 || remain < ipcp_len) {
 		LOGPPDP(LOGL_ERROR, pdp, "Malformed IPCP, ignoring\n");
 		return;
 	}
 	/* Three byte T16L header */
 	msgb_put_u16(resp, 0x8021);	/* IPCP */
 	len1 = msgb_put(resp, 1);	/* Length of contents: delay */
 	msgb_put_u8(resp, 0x02);	/* ACK */
 	msgb_put_u8(resp, ipcp->id);	/* ID: Needs to match request */
 	msgb_put_u8(resp, 0x00);	/* Length MSB */
 	len2 = msgb_put(resp, 1);	/* Length LSB: delay */
 	if (dns1->len == 4 && ipcp_contains_option(ipcp, ipcp_len, IPCP_OPT_PRIMARY_DNS, 4)) {
 		msgb_put_u8(resp, 0x81);		/* DNS1 Tag */
 		msgb_put_u8(resp, 2 + dns1->len);	/* DNS1 Length, incl. TL */
 		msgb_put_u32(resp, ntohl(dns1->v4.s_addr));
 	}
 	if (dns2->len == 4 && ipcp_contains_option(ipcp, ipcp_len, IPCP_OPT_SECONDARY_DNS, 4)) {
 		msgb_put_u8(resp, 0x83);		/* DNS2 Tag */
 		msgb_put_u8(resp, 2 + dns2->len);	/* DNS2 Length, incl. TL */
 		msgb_put_u32(resp, ntohl(dns2->v4.s_addr));
 	}
 	/* patch in length values */
 	len_appended = resp->tail - start;
 	*len1 = len_appended - 3;
 	*len2 = len_appended - 3;
 }
 static void process_pco_element_dns_ipv6(const struct pco_element *pco_elem, struct msgb *resp,
 					 const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	unsigned int i;
 	const uint8_t *tail = resp->tail;
 	for (i = 0; i < ARRAY_SIZE(apn->v6.cfg.dns); i++) {
 		const struct in46_addr *i46a = &apn->v6.cfg.dns[i];
 		if (i46a->len != 16)
 			continue;
 		msgb_t16lv_put(resp, PCO_P_DNS_IPv6_ADDR, i46a->len, i46a->v6.s6_addr);
 	}
 	if (resp->tail == tail)
 		LOGPPDP(LOGL_NOTICE, pdp, "MS requested IPv6 DNS, but APN has none configured\n");
 }
 static void process_pco_element_dns_ipv4(const struct pco_element *pco_elem, struct msgb *resp,
 					 const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	unsigned int i;
 	const uint8_t *tail = resp->tail;
 	for (i = 0; i < ARRAY_SIZE(apn->v4.cfg.dns); i++) {
 		const struct in46_addr *i46a = &apn->v4.cfg.dns[i];
 		if (i46a->len != 4)
 			continue;
 		msgb_t16lv_put(resp, PCO_P_DNS_IPv4_ADDR, i46a->len, (uint8_t *)&i46a->v4);
 	}
 	if (resp->tail == tail)
 		LOGPPDP(LOGL_NOTICE, pdp, "MS requested IPv4 DNS, but APN has none configured\n");
 }
 static void process_pco_element_link_mtu_ipv4(const struct pco_element *pco_elem, struct msgb *resp,
 					      const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	const uint16_t val_be = osmo_htons(apn->cfg.mtu);
 	msgb_t16lv_put(resp, PCO_P_IPv4_LINK_MTU, 2, (const uint8_t *)&val_be);
 }
 static void process_pco_element(const struct pco_element *pco_elem, struct msgb *resp,
 				const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	uint16_t protocol_id = osmo_load16be(&pco_elem->protocol_id);
 	LOGPPDP(LOGL_DEBUG, pdp, "PCO Protocol 0x%04x\n", protocol_id);
 	switch (protocol_id) {
 	case PCO_P_PAP:
 		process_pco_element_pap(pco_elem, resp, apn, pdp);
 		break;
 	case PCO_P_IPCP:
 		process_pco_element_ipcp(pco_elem, resp, apn, pdp);
 		break;
 	case PCO_P_DNS_IPv6_ADDR:
 		process_pco_element_dns_ipv6(pco_elem, resp, apn, pdp);
 		break;
 	case PCO_P_DNS_IPv4_ADDR:
 		process_pco_element_dns_ipv4(pco_elem, resp, apn, pdp);
 		break;
 	case PCO_P_IPv4_LINK_MTU:
 		process_pco_element_link_mtu_ipv4(pco_elem, resp, apn, pdp);
 		break;
 	default:
 		LOGPPDP(LOGL_INFO, pdp, "Unknown/Unimplemented PCO Protocol 0x%04x: %s\n",
 			protocol_id, osmo_hexdump_nospc(pco_elem->data, pco_elem->length));
 		break;
 	}
 }
 /* process one PCO request from a MS/UE, putting together the proper responses */
 void process_pco(const struct apn_ctx *apn, struct pdp_t *pdp)
 {
 	struct msgb *resp = msgb_alloc(256, "PCO.resp");
 	const struct ul255_t *pco = &pdp->pco_req;
 	const struct pco_element *pco_elem;
 	const uint8_t *cur;
 	/* build the header of the PCO response */
 	OSMO_ASSERT(resp);
 	msgb_put_u8(resp, 0x80); /* ext-bit + configuration protocol byte */
 	/* iterate over the PCO elements in the request; call process_pco_element() for each */
 	for (cur = pco->v + 1, pco_elem = (const struct pco_element *) cur;
 	     cur + sizeof(struct pco_element) <= pco->v + pco->l;
 	     cur += pco_elem->length + sizeof(*pco_elem), pco_elem = (const struct pco_element *) cur) {
 		process_pco_element(pco_elem, resp, apn, pdp);
 	}
 	/* copy the PCO response msgb and copy its contents over to the PDP context */
 	if (msgb_length(resp) > 1) {
 		memcpy(pdp->pco_neg.v, msgb_data(resp), msgb_length(resp));
 		pdp->pco_neg.l = msgb_length(resp);
 	} else
 		pdp->pco_neg.l = 0;
 	msgb_free(resp);
 }
--- a/ggsn/pco.h
+++ b/ggsn/pco.h
@@ -0,0 +1,80 @@
 #pragma once
 #include <stdint.h>
 #include <osmocom/gtp/pdp.h>
 /* 3GPP TS 24.008 10.5.6.3 */
 enum pco_protocols {
 	PCO_P_LCP		= 0xC021,
 	PCO_P_PAP		= 0xC023,
 	PCO_P_CHAP		= 0xC223,
 	PCO_P_IPCP		= 0x8021,
 	PCO_P_PCSCF_ADDR	= 0x0001,
 	PCO_P_IM_CN_SS_F	= 0x0002,
 	PCO_P_DNS_IPv6_ADDR	= 0x0003,
 	PCO_P_POLICY_CTRL_REJ	= 0x0004,	/* only in Network->MS */
 	PCO_P_MS_SUP_NETREQ_BCI	= 0x0005,
 	/* reserved */
 	PCO_P_DSMIPv6_HA_ADDR	= 0x0007,
 	PCO_P_DSMIPv6_HN_PREF	= 0x0008,
 	PCO_P_DSMIPv6_v4_HA_ADDR= 0x0009,
 	PCO_P_IP_ADDR_VIA_NAS	= 0x000a,	/* only MS->Network */
 	PCO_P_IPv4_ADDR_VIA_DHCP= 0x000b,	/* only MS->Netowrk */
 	PCO_P_PCSCF_IPv4_ADDR	= 0x000c,
 	PCO_P_DNS_IPv4_ADDR	= 0x000d,
 	PCO_P_MSISDN		= 0x000e,
 	PCO_P_IFOM_SUPPORT	= 0x000f,
 	PCO_P_IPv4_LINK_MTU	= 0x0010,
 	PCO_P_MS_SUPP_LOC_A_TFT	= 0x0011,
 	PCO_P_PCSCF_RESEL_SUP	= 0x0012,	/* only MS->Network */
 	PCO_P_NBIFOM_REQ	= 0x0013,
 	PCO_P_NBIFOM_MODE	= 0x0014,
 	PCO_P_NONIP_LINK_MTU	= 0x0015,
 	PCO_P_APN_RATE_CTRL_SUP	= 0x0016,
 	PCO_P_PS_DATA_OFF_UE	= 0x0017,
 	PCO_P_REL_DATA_SVC	= 0x0018,
 };
 struct pco_element {
 	uint16_t protocol_id;	/* network byte order */
 	uint8_t length;		/* length of data below */
 	uint8_t data[0];
 } __attribute__((packed));
 /* RFC 1332 IP Control Protocol options, extensions in RFC 1877 */
 enum ipcp_options {
 	IPCP_OPT_IPADDR = 3, /* RFC 1332 3.3 */
 	IPCP_OPT_PRIMARY_DNS = 129, /* RFC 1877 1.1 */
 	IPCP_OPT_SECONDARY_DNS = 131,  /* RFC 1877 1.2 */
 };
 struct ipcp_option_hdr {
 	uint8_t type;
 	uint8_t len;
 	uint8_t data[0];
 } __attribute__ ((packed));
 struct ipcp_hdr {
 	uint8_t code;
 	uint8_t id;
 	uint16_t len;
 	uint8_t options[0];
 } __attribute__ ((packed));
 /* RFC 1334, section 3.2. Packet Format */
 struct pap_element {
 	uint8_t code;
 	uint8_t id;
 	uint16_t len; /* length including header */
 	uint8_t data[0];
 } __attribute__((packed));
 enum pap_code {
 	PAP_CODE_AUTH_REQ = 1,
 	PAP_CODE_AUTH_ACK = 2,
 	PAP_CODE_AUTH_NAK = 3,
 };
 struct apn_ctx;
 void process_pco(const struct apn_ctx *apn, struct pdp_t *pdp);
--- a/ggsn/sgsn.c
+++ b/ggsn/sgsn.c
@@ -0,0 +1,168 @@
 #include "sgsn.h"
 #include "ggsn.h"
 #include "../gtp/gtp_internal.h"
 static bool sgsn_peer_attempt_free(struct sgsn_peer *sgsn)
 {
 	/* We have to be careful here, since if all pdp ctx for that sgsn were
 	   deactivated in-between we sent the Echo Req and receivied the timeout
 	   indication, the sgsn (cbp) may be already gone. We need to add some
 	   counter reference of echo requets in flight and only free sgsn
 	   structures when it goes to zero decreased for all Echo Resp. We do it
 	   this way because currently in libgtp there's no understanding of "gsn
 	   peer" for which messages are grouped and hence we cannot request
 	   libgtp to drop all queued messages for a specific peer. */
 	if (sgsn->tx_msgs_queued) {
 		LOGSGSN(LOGL_INFO, sgsn, "Delaying delete, still %u echo messages queued\n",
 			sgsn->tx_msgs_queued);
 		return false;
 	}
 	llist_del(&sgsn->entry);
 	LOGSGSN(LOGL_INFO, sgsn, "Deleting SGSN\n");
 	talloc_free(sgsn);
 	return true;
 }
 static void sgsn_peer_echo_req(struct sgsn_peer *sgsn)
 {
 	struct ggsn_ctx *ggsn = sgsn->ggsn;
 	LOGSGSN(LOGL_INFO, sgsn, "Tx Echo Request\n");
 	gtp_echo_req(ggsn->gsn, sgsn->gtp_version, sgsn, &sgsn->addr);
 	sgsn->tx_msgs_queued++;
 }
 void sgsn_peer_echo_resp(struct sgsn_peer *sgsn, bool timeout)
 {
 	if (timeout) {
 		LOGSGSN(LOGL_NOTICE, sgsn, "Rx Echo Request timed out!\n");
 		sgsn_peer_drop_all_pdp(sgsn);
 	} else {
 		LOGSGSN(LOGL_INFO, sgsn, "Rx Echo Response\n");
 	}
 	/* We decrement it here after dropping all pdps to make sure sgsn was
 	   not freed upon last pdp ctx deleted and is still alive now */
 	sgsn->tx_msgs_queued--;
 	if (llist_empty(&sgsn->pdp_list))
 		sgsn_peer_attempt_free(sgsn);
 }
 void sgsn_echo_timer_start(struct sgsn_peer *sgsn)
 {
 	if (sgsn->ggsn->cfg.echo_interval == 0)
 		return;
 	sgsn_peer_echo_req(sgsn);
 	osmo_timer_schedule(&sgsn->echo_timer, sgsn->ggsn->cfg.echo_interval, 0);
 }
 void sgsn_echo_timer_stop(struct sgsn_peer *sgsn)
 {
 	osmo_timer_del(&sgsn->echo_timer);
 }
 static void sgsn_echo_timer_cb(void *data)
 {
 	struct sgsn_peer *sgsn = (struct sgsn_peer *) data;
 	sgsn_echo_timer_start(sgsn);
 }
 struct sgsn_peer *sgsn_peer_allocate(struct ggsn_ctx *ggsn, struct in_addr *ia, unsigned int gtp_version)
 {
 	struct sgsn_peer *sgsn;
 	sgsn = talloc_zero_size(ggsn, sizeof(struct sgsn_peer));
 	sgsn->ggsn = ggsn;
 	sgsn->addr = *ia;
 	sgsn->gtp_version = gtp_version;
 	sgsn->remote_restart_ctr = -1;
 	INIT_LLIST_HEAD(&sgsn->pdp_list);
 	INIT_LLIST_HEAD(&sgsn->entry);
 	osmo_timer_setup(&sgsn->echo_timer, sgsn_echo_timer_cb, sgsn);
 	LOGSGSN(LOGL_INFO, sgsn, "Discovered\n");
 	return sgsn;
 }
 void sgsn_peer_add_pdp_priv(struct sgsn_peer *sgsn, struct pdp_priv_t *pdp_priv)
 {
 	bool was_empty = llist_empty(&sgsn->pdp_list);
 	pdp_priv->sgsn = sgsn;
 	llist_add(&pdp_priv->entry, &sgsn->pdp_list);
 	if (was_empty)
 		sgsn_echo_timer_start(sgsn);
 }
 void sgsn_peer_remove_pdp_priv(struct pdp_priv_t* pdp_priv)
 {
 	struct sgsn_peer *sgsn = pdp_priv->sgsn;
 	llist_del(&pdp_priv->entry);
 	if (sgsn && llist_empty(&sgsn->pdp_list)) {
 		/* No PDP contexts associated to this SGSN, no need to keep it */
 		sgsn_echo_timer_stop(sgsn);
 		/* sgsn may not be freed if there are some messages still queued
 		   in libgtp which could return a pointer to it */
 		sgsn_peer_attempt_free(sgsn);
 	}
 	pdp_priv->sgsn = NULL;
 }
 /* High-level function to be called in case a GGSN has disappeared or
 * otherwise lost state (recovery procedure). It will detach all related pdp ctx
 * from a ggsn and communicate deact to MS. Optionally (!NULL), one pdp ctx can
 * be kept alive to allow handling later message which contained the Recovery IE. */
 static unsigned int sgsn_peer_drop_all_pdp_except(struct sgsn_peer *sgsn, struct pdp_priv_t *except)
 {
 	unsigned int num = 0;
 	char buf[INET_ADDRSTRLEN];
 	unsigned int count = llist_count(&sgsn->pdp_list);
 	inet_ntop(AF_INET, &sgsn->addr, buf, sizeof(buf));
 	struct pdp_priv_t *pdp, *pdp2;
 	llist_for_each_entry_safe(pdp, pdp2, &sgsn->pdp_list, entry) {
 		if (pdp == except)
 			continue;
 		ggsn_close_one_pdp(pdp->lib);
 		num++;
 		if (num == count) {
 			/* Note: if except is NULL, all pdp contexts are freed and sgsn
 			 * is most probably already freed at this point.
 			 * As a result, last access to sgsn->pdp_list before exiting
 			 * loop would access already freed memory. Avoid it by exiting
 			 * the loop without the last check, and make sure sgsn is not
 			 * accessed after this loop. */
 			 break;
 		}
 	}
 	LOGP(DGGSN, LOGL_INFO, "SGSN(%s) Dropped %u PDP contexts\n", buf, num);
 	return num;
 }
 unsigned int sgsn_peer_drop_all_pdp(struct sgsn_peer *sgsn)
 {
 	return sgsn_peer_drop_all_pdp_except(sgsn, NULL);
 }
 int sgsn_peer_handle_recovery(struct sgsn_peer *sgsn, struct pdp_t *pdp, uint8_t recovery)
 {
 	struct pdp_priv_t *pdp_priv = NULL;
 	if (sgsn->remote_restart_ctr == -1) {
 		/* First received ECHO RESPONSE, note the restart ctr */
 		sgsn->remote_restart_ctr = recovery;
 	} else if (sgsn->remote_restart_ctr != recovery) {
 		/* counter has changed (SGSN restart): release all PDP */
 		LOGSGSN(LOGL_NOTICE, sgsn, "SGSN recovery (%u->%u) pdp=%p, "
 		     "releasing all%s PDP contexts\n",
 		     sgsn->remote_restart_ctr, recovery, pdp, pdp ? " other" : "");
 		sgsn->remote_restart_ctr = recovery;
 		if (pdp)
 			pdp_priv = pdp->priv;
 		sgsn_peer_drop_all_pdp_except(sgsn, pdp_priv);
 	}
 	return 0;
 }
--- a/ggsn/sgsn.h
+++ b/ggsn/sgsn.h
@@ -0,0 +1,46 @@
 #pragma once
 #include <stdint.h>
 #include <stdbool.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/gtp/pdp.h>
 struct ggsn_ctx;
 struct pdp_priv_t;
 struct sgsn_peer {
 	struct llist_head entry; /* to be included into ggsn_ctx */
 	struct ggsn_ctx *ggsn; /* backpointer to ggsn_ctx */
 	struct in_addr addr;	/* Addr of the sgsn peer */
 	unsigned int gtp_version; /* GTP version */
 	int remote_restart_ctr; /* Last received Restart Ctr from sgsn peer, -1 == unknown */
 	/* list of pdp contexts associated with this sgsn */
 	struct llist_head pdp_list;
 	/* Sends echo request towards SGSN on expiration. Echo Resp is received
 	   through cb_recovery2(), and echo Req timeout through
 	   cb_conf(GTP_ECHO_REQ, EOF, NULL, cbp); */
 	struct osmo_timer_list echo_timer;
 	/* Number of GTP messages in libgtp transmit queue */
 	unsigned int tx_msgs_queued;
 };
 struct sgsn_peer *sgsn_peer_allocate(struct ggsn_ctx *ggsn, struct in_addr *ia, unsigned int gtp_version);
 void sgsn_peer_add_pdp_priv(struct sgsn_peer *sgsn, struct pdp_priv_t *pdp_priv);
 void sgsn_peer_remove_pdp_priv(struct pdp_priv_t *pdp_priv);
 void sgsn_echo_timer_start(struct sgsn_peer *sgsn);
 void sgsn_echo_timer_stop(struct sgsn_peer *sgsn);
 void sgsn_peer_echo_resp(struct sgsn_peer *sgsn, bool timeout);
 unsigned int sgsn_peer_drop_all_pdp(struct sgsn_peer *sgsn);
 int sgsn_peer_handle_recovery(struct sgsn_peer *sgsn, struct pdp_t *pdp, uint8_t recovery);
 #define LOGSGSN(level, sgsn, fmt, args...) { \
 	char _buf[INET_ADDRSTRLEN]; \
 	LOGP(DGGSN, level, "SGSN(%s): " fmt, inet_ntop(AF_INET, &sgsn->addr, _buf, sizeof(_buf)), ## args); \
 	} while (0)
--- a/151
+++ b/151
@@ -0,0 +1,151 @@
 #!/bin/sh
 # Print a version string.
 scriptversion=2010-01-28.01
 # Copyright (C) 2007-2010 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
 # It may be run two ways:
 # - from a git repository in which the "git describe" command below
 #   produces useful output (thus requiring at least one signed tag)
 # - from a non-git-repo directory containing a .tarball-version file, which
 #   presumes this script is invoked like "./git-version-gen .tarball-version".
 # In order to use intra-version strings in your project, you will need two
 # separate generated version string files:
 #
 # .tarball-version - present only in a distribution tarball, and not in
 #   a checked-out repository.  Created with contents that were learned at
 #   the last time autoconf was run, and used by git-version-gen.  Must not
 #   be present in either $(srcdir) or $(builddir) for git-version-gen to
 #   give accurate answers during normal development with a checked out tree,
 #   but must be present in a tarball when there is no version control system.
 #   Therefore, it cannot be used in any dependencies.  GNUmakefile has
 #   hooks to force a reconfigure at distribution time to get the value
 #   correct, without penalizing normal development with extra reconfigures.
 #
 # .version - present in a checked-out repository and in a distribution
 #   tarball.  Usable in dependencies, particularly for files that don't
 #   want to depend on config.h but do want to track version changes.
 #   Delete this file prior to any autoconf run where you want to rebuild
 #   files to pick up a version string change; and leave it stale to
 #   minimize rebuild time after unrelated changes to configure sources.
 #
 # It is probably wise to add these two files to .gitignore, so that you
 # don't accidentally commit either generated file.
 #
 # Use the following line in your configure.ac, so that $(VERSION) will
 # automatically be up-to-date each time configure is run (and note that
 # since configure.ac no longer includes a version string, Makefile rules
 # should not depend on configure.ac for version updates).
 #
 # AC_INIT([GNU project],
 #         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
 #         [bug-project@example])
 #
 # Then use the following lines in your Makefile.am, so that .version
 # will be present for dependencies, and so that .tarball-version will
 # exist in distribution tarballs.
 #
 # BUILT_SOURCES = $(top_srcdir)/.version
 # $(top_srcdir)/.version:
 #	echo $(VERSION) > $@-t && mv $@-t $@
 # dist-hook:
 #	echo $(VERSION) > $(distdir)/.tarball-version
 case $# in
    1) ;;
    *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
 esac
 tarball_version_file=$1
 nl='
 '
 # First see if there is a tarball-only version file.
 # then try "git describe", then default.
 if test -f $tarball_version_file
 then
    v=`cat $tarball_version_file` || exit 1
    case $v in
 	*$nl*) v= ;; # reject multi-line output
 	[0-9]*) ;;
 	*) v= ;;
    esac
    test -z "$v" \
 	&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
 fi
 if test -n "$v"
 then
    : # use $v
 elif
       v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
 	  || git describe --abbrev=4 HEAD 2>/dev/null` \
    && case $v in
 	 [0-9]*) ;;
 	 v[0-9]*) ;;
 	 *) (exit 1) ;;
       esac
 then
    # Is this a new git that lists number of commits since the last
    # tag or the previous older version that did not?
    #   Newer: v6.10-77-g0f8faeb
    #   Older: v6.10-g0f8faeb
    case $v in
 	*-*-*) : git describe is okay three part flavor ;;
 	*-*)
 	    : git describe is older two part flavor
 	    # Recreate the number of commits and rewrite such that the
 	    # result is the same as if we were using the newer version
 	    # of git describe.
 	    vtag=`echo "$v" | sed 's/-.*//'`
 	    numcommits=`git rev-list "$vtag"..HEAD | wc -l`
 	    v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
 	    ;;
    esac
    # Change the first '-' to a '.', so version-comparing tools work properly.
    # Remove the "g" in git describe's output string, to save a byte.
    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
 else
    v=UNKNOWN
 fi
 v=`echo "$v" |sed 's/^v//'`
 # Don't declare a version "dirty" merely because a time stamp has changed.
 git status > /dev/null 2>&1
 dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
 case "$dirty" in
    '') ;;
    *) # Append the suffix only if there isn't one already.
 	case $v in
 	  *-dirty) ;;
 	  *) v="$v-dirty" ;;
 	esac ;;
 esac
 # Omit the trailing newline, so that m4_esyscmd can use the result directly.
 echo "$v" | tr -d '\012'
 # Local variables:
 # eval: (add-hook 'write-file-hooks 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
 # time-stamp-end: "$"
 # End:
--- a/gtp/Makefile.am
+++ b/gtp/Makefile.am
@@ -1,12 +1,31 @@
 # This is _NOT_ the library release version, it's an API version.
 # Please read chapter "Library interface versions" of the libtool documentation
 # before making any modifications: https://www.gnu.org/software/libtool/manual/html_node/Versioning.html
 # If major=current-age is increased, remember to update the dh_strip line in debian/rules!
 LIBVERSION=11:0:0
 lib_LTLIBRARIES = libgtp.la
-include_HEADERS = gtp.h pdp.h
+AM_CFLAGS = \
 	    -fno-builtin \
 	    -Wall \
 	    -DSBINDIR='"$(sbindir)"' \
 	    -I$(top_srcdir)/include \
 	    $(LIBOSMOCORE_CFLAGS) \
 	    $(NULL)
-AM_CFLAGS = -O2 -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+libgtp_la_SOURCES = \
 		    gsn.c \
 		    gsn_internal.h \
 		    gtp.c \
 		    gtp_internal.h \
 		    gtpie.c \
 		    lookupa.c \
 		    lookupa.h \
 		    pdp.c \
 		    queue.c \
 		    queue.h \
 		    $(NULL)
-libgtp_la_SOURCES = gtp.c gtp.h gtpie.c gtpie.h pdp.c pdp.h lookupa.c lookupa.h queue.c queue.h
+libgtp_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined
 libgtp_la_LIBADD = $(LIBOSMOCORE_LIBS)
--- a/gtp/gsn.c
+++ b/gtp/gsn.c
@@ -0,0 +1,587 @@
 /*
 *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
 *  Copyright (C) 2010-2011, 2016-2017 Harald Welte <laforge@gnumonks.org>
 *  Copyright (C) 2015-2017 sysmocom - s.f.m.c. GmbH
 *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
 *
 */
 /*
 * gtp.c: Contains all GTP functionality. Should be able to handle multiple
 * tunnels in the same program.
 *
 * TODO:
 *  - Do we need to handle fragmentation?
 */
 #ifdef __linux__
 #define _GNU_SOURCE 1
 #endif
 #include <osmocom/core/logging.h>
 #include <osmocom/core/utils.h>
 #include <osmocom/core/stats.h>
 #include <osmocom/core/rate_ctr.h>
 #if defined(__FreeBSD__)
 #include <sys/endian.h>
 #endif
 #include "../config.h"
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <sys/stat.h>
 #include <time.h>
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <arpa/inet.h>
 /* #include <stdint.h>  ISO C99 types */
 #include <osmocom/gtp/pdp.h>
 #include <osmocom/gtp/gtp.h>
 #include <osmocom/gtp/gtpie.h>
 #include "queue.h"
 #include "gsn_internal.h"
 #include "gtp_internal.h"
 /* Error reporting functions */
 #define LOGP_WITH_ADDR(ss, level, addr, fmt, args...)                    \
 		LOGP(ss, level, "addr(%s:%d) " fmt,                      \
 		     inet_ntoa((addr).sin_addr), htons((addr).sin_port), \
 		     ##args)
 static const struct rate_ctr_desc gsn_ctr_description[] = {
 	[GSN_CTR_ERR_SOCKET] = { "err:socket", "Socket error" },
 	[GSN_CTR_ERR_READFROM] = { "err:readfrom", "readfrom() errors" },
 	[GSN_CTR_ERR_SENDTO] = { "err:sendto", "sendto() errors" },
 	[GSN_CTR_ERR_QUEUEFULL] = { "err:queuefull", "Failed to queue message because queue is full" },
 	[GSN_CTR_ERR_SEQ] = { "err:seq", "Sequence number out of range" },
 	[GSN_CTR_ERR_ADDRESS] = { "err:address", "GSN address conversion failed" },
 	[GSN_CTR_ERR_UNKNOWN_PDP] = { "err:unknown_pdp", "Failed looking up PDP context" },
 	[GSN_CTR_ERR_UNEXPECTED_CAUSE] = { "err:unexpected_cause", "Unexpected cause value received" },
 	[GSN_CTR_ERR_OUT_OF_PDP] = { "err:out_of_pdp", "Out of storage for PDP contexts" },
 	[GSN_CTR_PKT_EMPTY] = { "pkt:empty", "Empty packet received" },
 	[GSN_CTR_PKT_UNSUP] = { "pkt:unsupported", "Unsupported GTP version received" },
 	[GSN_CTR_PKT_TOOSHORT] = { "pkt:too_short", "Packet too short received" },
 	[GSN_CTR_PKT_UNKNOWN] = { "pkt:unknown", "Unknown packet type received" },
 	[GSN_CTR_PKT_UNEXPECT] = { "pkt:unexpected", "Unexpected packet type received" },
 	[GSN_CTR_PKT_DUPLICATE] = { "pkt:duplicate", "Duplicate or unsolicited packet received" },
 	[GSN_CTR_PKT_MISSING] = { "pkt:missing", "Missing IE in packet received" },
 	[GSN_CTR_PKT_INCORRECT] = { "pkt:incorrect", "Incorrect IE in packet received" },
 	[GSN_CTR_PKT_INVALID] = { "pkt:invalid", "Invalid format in packet received" },
 };
 static const struct rate_ctr_group_desc gsn_ctrg_desc = {
 	"gsn",
 	"GSN Statistics",
 	OSMO_STATS_CLASS_PEER,
 	ARRAY_SIZE(gsn_ctr_description),
 	gsn_ctr_description,
 };
 static unsigned int gsn_ctr_next_idx = 0;
 /* Global timer definitions for GTP operation, provided for convenience. To make these user configurable, it is convenient to add
 * gtp_gsn_tdefs as one of your program's osmo_tdef_group entries and call osmo_tdef_vty_init(). */
 struct osmo_tdef gtp_T_defs[] = {
 	{ .T = GTP_GSN_TIMER_T3_RESPONSE, .default_val = 5, .unit = OSMO_TDEF_S,
 	  .desc = "Timer T3-RESPONSE holds the maximum wait time for a response of a request message"
 	},
 	{ .T = GTP_GSN_TIMER_N3_REQUESTS, .default_val = 3, .unit = OSMO_TDEF_CUSTOM,
 	  .desc = "Counter N3-REQUESTS holds the maximum number of attempts made by GTP to send a request message"
 	},
 	{ .T = GTP_GSN_TIMER_T3_HOLD_RESPONSE, .default_val = 5 * 3 /* (GTP_GSN_TIMER_T3_RESPONSE * GTP_GSN_TIMER_N3_REQUESTS) */, .unit = OSMO_TDEF_S,
 	  .desc = "Time a GTP respoonse message is kept cached to re-transmit it when a duplicate request is received. Value is generally equal to (T3-RESPONSE * N3-REQUESTS) set at the peer"
 	},
 	{}
 };
 /* API Functions */
 /* Deprecated, use gtp_pdp_newpdp() instead */
 int gtp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp,
 	       uint64_t imsi, uint8_t nsapi)
 {
 	int rc;
 	rc = gtp_pdp_newpdp(gsn, pdp, imsi, nsapi, NULL);
 	return rc;
 }
 int gtp_freepdp(struct gsn_t *gsn, struct pdp_t *pdp)
 {
 	if (gsn->cb_delete_context)
 		gsn->cb_delete_context(pdp);
 	return pdp_freepdp(pdp);
 }
 /* Free pdp and all its secondary PDP contexts. Must be called on the primary PDP context. */
 int gtp_freepdp_teardown(struct gsn_t *gsn, struct pdp_t *pdp)
 {
 	int n;
 	struct pdp_t *secondary_pdp;
 	OSMO_ASSERT(!pdp->secondary);
 	for (n = 0; n < PDP_MAXNSAPI; n++) {
 		if (pdp->secondary_tei[n]) {
 			if (gtp_pdp_getgtp1(gsn, &secondary_pdp,
 					     pdp->secondary_tei[n])) {
 				LOGP(DLGTP, LOGL_ERROR,
 					"Unknown secondary PDP context\n");
 				continue;
 			}
 			if (pdp != secondary_pdp) {
 				gtp_freepdp(gsn, secondary_pdp);
 			}
 		}
 	}
 	return gtp_freepdp(gsn, pdp);
 }
 /* gtp_gpdu */
 extern int gtp_fd(struct gsn_t *gsn)
 {
 	return gsn->fd0;
 }
 int gtp_set_cb_unsup_ind(struct gsn_t *gsn,
 			 int (*cb) (struct sockaddr_in * peer))
 {
 	gsn->cb_unsup_ind = cb;
 	return 0;
 }
 int gtp_set_cb_extheader_ind(struct gsn_t *gsn,
 			     int (*cb) (struct sockaddr_in * peer))
 {
 	gsn->cb_extheader_ind = cb;
 	return 0;
 }
 int gtp_set_cb_ran_info_relay_ind(struct gsn_t *gsn,
 			     int (*cb) (struct sockaddr_in * peer, union gtpie_member **ie))
 {
 	gsn->cb_ran_info_relay_ind = cb;
 	return 0;
 }
 /* API: Initialise delete context callback */
 /* Called whenever a pdp context is deleted for any reason */
 int gtp_set_cb_delete_context(struct gsn_t *gsn, int (*cb) (struct pdp_t * pdp))
 {
 	gsn->cb_delete_context = cb;
 	return 0;
 }
 int gtp_set_cb_conf(struct gsn_t *gsn,
 		    int (*cb) (int type, int cause,
 			       struct pdp_t * pdp, void *cbp))
 {
 	gsn->cb_conf = cb;
 	return 0;
 }
 int gtp_set_cb_recovery(struct gsn_t *gsn,
 			int (*cb) (struct sockaddr_in * peer, uint8_t recovery))
 {
 	gsn->cb_recovery = cb;
 	return 0;
 }
 /* cb_recovery()
 * pdp may be NULL if Recovery IE was received from a message independent
 * of any PDP ctx (such as Echo Response), or because pdp ctx is unknown to the
 * local setup. In case pdp is known, caller may want to keep that pdp alive to
 * handle subsequent msg cb as this specific pdp ctx is still valid according to
 * specs.
 */
 int gtp_set_cb_recovery2(struct gsn_t *gsn,
 			int (*cb_recovery2) (struct sockaddr_in * peer, struct pdp_t * pdp, uint8_t recovery))
 {
 	gsn->cb_recovery2 = cb_recovery2;
 	return 0;
 }
 /* cb_recovery()
 * pdp may be NULL if Recovery IE was received from a message independent
 * of any PDP ctx (such as Echo Response), or because pdp ctx is unknown to the
 * local setup. In case pdp is known, caller may want to keep that pdp alive to
 * handle subsequent msg cb as this specific pdp ctx is still valid according to
 * specs.
 */
 int gtp_set_cb_recovery3(struct gsn_t *gsn,
 			 int (*cb_recovery3) (struct gsn_t *gsn, struct sockaddr_in *peer,
 					      struct pdp_t *pdp, uint8_t recovery))
 {
 	gsn->cb_recovery3 = cb_recovery3;
 	return 0;
 }
 int gtp_set_cb_data_ind(struct gsn_t *gsn,
 			       int (*cb_data_ind) (struct pdp_t * pdp,
 						   void *pack, unsigned len))
 {
 	gsn->cb_data_ind = cb_data_ind;
 	return 0;
 }
 static int queue_timer_retrans(struct gsn_t *gsn)
 {
 	/* Retransmit any outstanding packets */
 	/* Remove from queue if maxretrans exceeded */
 	time_t now;
 	struct qmsg_t *qmsg;
 	unsigned int t3_response, n3_requests;
 	now = time(NULL);
 	t3_response = osmo_tdef_get(gsn->tdef, GTP_GSN_TIMER_T3_RESPONSE, OSMO_TDEF_S, -1);
 	n3_requests = osmo_tdef_get(gsn->tdef, GTP_GSN_TIMER_N3_REQUESTS, OSMO_TDEF_CUSTOM, -1);
 	/* get first element in queue, as long as the timeout of that
 	 * element has expired */
 	while ((!queue_getfirst(gsn->queue_req, &qmsg)) &&
 	       (qmsg->timeout <= now)) {
 		if (qmsg->retrans > n3_requests) {	/* Too many retrans */
 			LOGP(DLGTP, LOGL_NOTICE, "Retransmit req queue timeout of seq %" PRIu16 "\n",
 			     qmsg->seq);
 			if (gsn->cb_conf)
 				gsn->cb_conf(qmsg->type, EOF, NULL, qmsg->cbp);
 			queue_freemsg(gsn->queue_req, qmsg);
 		} else {
 			LOGP(DLGTP, LOGL_INFO, "Retransmit (%d) of seq %" PRIu16 "\n",
 			     qmsg->retrans, qmsg->seq);
 			if (sendto(qmsg->fd, &qmsg->p, qmsg->l, 0,
 				   (struct sockaddr *)&qmsg->peer,
 				   sizeof(struct sockaddr_in)) < 0) {
 				rate_ctr_inc2(gsn->ctrg, GSN_CTR_ERR_SENDTO);
 				LOGP(DLGTP, LOGL_ERROR,
 					"Sendto(fd0=%d, msg=%lx, len=%d) failed: Error = %s\n",
 					gsn->fd0, (unsigned long)&qmsg->p,
 					qmsg->l, strerror(errno));
 			}
 			queue_back(gsn->queue_req, qmsg);
 			qmsg->timeout = now + t3_response;
 			qmsg->retrans++;
 		}
 	}
 	/* Also clean up reply timeouts */
 	while ((!queue_getfirst(gsn->queue_resp, &qmsg)) &&
 	       (qmsg->timeout < now)) {
 		LOGP(DLGTP, LOGL_DEBUG, "Retransmit resp queue seq %"
 		     PRIu16 " expired, removing from queue\n", qmsg->seq);
 		queue_freemsg(gsn->queue_resp, qmsg);
 	}
 	return 0;
 }
 static int queue_timer_retranstimeout(struct gsn_t *gsn, struct timeval *timeout)
 {
 	time_t now, later, diff;
 	struct qmsg_t *qmsg;
 	timeout->tv_usec = 0;
 	if (queue_getfirst(gsn->queue_req, &qmsg)) {
 		timeout->tv_sec = 10;
 	} else {
 		now = time(NULL);
 		later = qmsg->timeout;
 		timeout->tv_sec = later - now;
 		if (timeout->tv_sec < 0)
 			timeout->tv_sec = 0;	/* No negative allowed */
 		if (timeout->tv_sec > 10)
 			timeout->tv_sec = 10;	/* Max sleep for 10 sec */
 	}
 	if (queue_getfirst(gsn->queue_resp, &qmsg)) {
 		/* already set by queue_req, do nothing */
 	} else { /* trigger faster if earlier timeout exists in queue_resp */
 		now = time(NULL);
 		later = qmsg->timeout;
 		diff = later - now;
 		if (diff < 0)
 			diff = 0;
 		if (diff < timeout->tv_sec)
 			timeout->tv_sec = diff;
 	}
 	return 0;
 }
 void gtp_queue_timer_start(struct gsn_t *gsn)
 {
 	struct timeval next;
 	/* Retrieve next retransmission as timeval */
 	queue_timer_retranstimeout(gsn, &next);
 	/* re-schedule the timer */
 	osmo_timer_schedule(&gsn->queue_timer, next.tv_sec, next.tv_usec/1000);
 }
 /* timer callback for libgtp retransmission and ping */
 static void queue_timer_cb(void *data)
 {
 	struct gsn_t *gsn = data;
 	/* do all the retransmissions as needed */
 	queue_timer_retrans(gsn);
 	gtp_queue_timer_start(gsn);
 }
 /**
 * @brief clear the request and response queue. Useful for debugging to reset "some" state.
 * @param gsn The GGSN instance
 */
 void gtp_clear_queues(struct gsn_t *gsn)
 {
 	struct qmsg_t *qmsg;
 	LOGP(DLGTP, LOGL_INFO, "Clearing req & resp retransmit queues\n");
 	while (!queue_getfirst(gsn->queue_req, &qmsg)) {
 		queue_freemsg(gsn->queue_req, qmsg);
 	}
 	while (!queue_getfirst(gsn->queue_resp, &qmsg)) {
 		queue_freemsg(gsn->queue_resp, qmsg);
 	}
 }
 /* Perform restoration and recovery error handling as described in 29.060 */
 static void log_restart(struct gsn_t *gsn)
 {
 	FILE *f;
 	int i, rc;
 	int counter = 0;
 	char *filename;
 	filename = talloc_asprintf(NULL, "%s/%s", gsn->statedir, RESTART_FILE);
 	OSMO_ASSERT(filename);
 	/* We try to open file. On failure we will later try to create file */
 	if (!(f = fopen(filename, "r"))) {
 		LOGP(DLGTP, LOGL_NOTICE,
 			"State information file (%s) not found. Creating new file.\n",
 			filename);
 	} else {
 		rc = fscanf(f, "%d", &counter);
 		if (rc != 1) {
 			LOGP(DLGTP, LOGL_ERROR,
 				"fscanf failed to read counter value\n");
 			goto close_file;
 		}
 		if (fclose(f)) {
 			LOGP(DLGTP, LOGL_ERROR,
 				"fclose failed: Error = %s\n", strerror(errno));
 		}
 	}
 	gsn->restart_counter = (unsigned char)counter;
 	gsn->restart_counter++;
 	/* Keep the umask closely wrapped around our fopen() call in case the
 	 * log outputs cause file creation. */
 	i = umask(022);
 	f = fopen(filename, "w");
 	umask(i);
 	if (!f) {
 		LOGP(DLGTP, LOGL_ERROR,
 			"fopen(path=%s, mode=%s) failed: Error = %s\n", filename,
 			"w", strerror(errno));
 		goto free_filename;
 	}
 	fprintf(f, "%d\n", gsn->restart_counter);
 close_file:
 	if (fclose(f))
 		LOGP(DLGTP, LOGL_ERROR,
 			"fclose failed: Error = %s\n", strerror(errno));
 free_filename:
 	talloc_free(filename);
 }
 static int create_and_bind_socket(const char *name, struct gsn_t *gsn, int *fd, int domain,
 				  const struct in_addr *listen, int port)
 {
 	struct sockaddr_in addr;
 	int type = SOCK_DGRAM;
 	int protocol = 0;
 	*fd = socket(domain, type, protocol);
 	if (*fd < 0) {
 		rate_ctr_inc2(gsn->ctrg, GSN_CTR_ERR_SOCKET);
 		LOGP(DLGTP, LOGL_ERROR,
 		     "%s socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
 		     name, domain, type, protocol, strerror(errno));
 		return -errno;
 	}
 	memset(&addr, 0, sizeof(addr));
 	addr.sin_family = domain;
 	addr.sin_addr = *listen;
 	addr.sin_port = htons(port);
 #if defined(__FreeBSD__) || defined(__APPLE__)
 	addr.sin_len = sizeof(addr);
 #endif
 	if (bind(*fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 		rate_ctr_inc2(gsn->ctrg, GSN_CTR_ERR_SOCKET);
 		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
 			       "%s bind(fd=%d) failed: Error = %s\n",
 			       name, *fd, strerror(errno));
 		return -errno;
 	}
 	return 0;
 }
 int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 	    int mode)
 {
 	LOGP(DLGTP, LOGL_NOTICE, "GTP: gtp_newgsn() started at %s\n", inet_ntoa(*listen));
 	*gsn = talloc_zero(tall_libgtp_ctx, struct gsn_t);
 	(*gsn)->statedir = statedir;
 	log_restart(*gsn);
 	/* Initialise sequence number */
 	(*gsn)->seq_next = (*gsn)->restart_counter * 1024;
 	/* Initialize timers: */
 	(*gsn)->tdef = gtp_T_defs;
 	/* Small hack to properly reset tdef for old clients not using the tdef_group: */
 	OSMO_ASSERT(gtp_T_defs[0].default_val != 0);
 	if (gtp_T_defs[0].val == 0)
 		osmo_tdefs_reset((*gsn)->tdef);
 	/* Initialise request retransmit queue */
 	queue_new(&(*gsn)->queue_req);
 	queue_new(&(*gsn)->queue_resp);
 	/* Initialise pdp table */
 	pdp_init(*gsn);
 	/* Initialize internal queue timer */
 	osmo_timer_setup(&(*gsn)->queue_timer, queue_timer_cb, *gsn);
 	/* Initialize counter group: */
 	(*gsn)->ctrg = rate_ctr_group_alloc(NULL, &gsn_ctrg_desc, gsn_ctr_next_idx++);
 	/* Initialise call back functions */
 	(*gsn)->cb_create_context_ind = 0;
 	(*gsn)->cb_update_context_ind = 0;
 	(*gsn)->cb_delete_context = 0;
 	(*gsn)->cb_unsup_ind = 0;
 	(*gsn)->cb_conf = 0;
 	(*gsn)->cb_data_ind = 0;
 	/* Store function parameters */
 	/* Same IP for user traffic and signalling */
 	(*gsn)->gsnc = *listen;
 	(*gsn)->gsnu = *listen;
 	(*gsn)->mode = mode;
 	(*gsn)->fd0 = -1;
 	(*gsn)->fd1c = -1;
 	(*gsn)->fd1u = -1;
 	/* Create GTP version 0 socket */
 	if (create_and_bind_socket("GTPv0", *gsn, &(*gsn)->fd0, AF_INET, listen, GTP0_PORT) < 0)
 		goto error;
 	/* Create GTP version 1 control plane socket */
 	if (create_and_bind_socket("GTPv1 control plane", *gsn, &(*gsn)->fd1c, AF_INET, listen, GTP1C_PORT) < 0)
 		goto error;
 	/* Create GTP version 1 user plane socket */
 	if (create_and_bind_socket("GTPv1 user plane", *gsn, &(*gsn)->fd1u, AF_INET, listen, GTP1U_PORT) < 0)
 		goto error;
 	/* Start internal queue timer */
 	gtp_queue_timer_start(*gsn);
 	return 0;
 error:
 	gtp_free(*gsn);
 	*gsn = NULL;
 	return -1;
 }
 int gtp_free(struct gsn_t *gsn)
 {
 	/* Cleanup internal queue timer */
 	osmo_timer_del(&gsn->queue_timer);
 	/* Clean up retransmit queues */
 	queue_free(gsn->queue_req);
 	queue_free(gsn->queue_resp);
 	close(gsn->fd0);
 	close(gsn->fd1c);
 	close(gsn->fd1u);
 	rate_ctr_group_free(gsn->ctrg);
 	talloc_free(gsn);
 	return 0;
 }
 /* API: Register create context indication callback */
 int gtp_set_cb_create_context_ind(struct gsn_t *gsn,
 				  int (*cb_create_context_ind) (struct pdp_t *
 								pdp))
 {
 	gsn->cb_create_context_ind = cb_create_context_ind;
 	return 0;
 }
 int gtp_set_cb_update_context_ind(struct gsn_t *gsn,
 				  int (*cb_update_context_ind)(struct pdp_t *pdp))
 {
 	gsn->cb_update_context_ind = cb_update_context_ind;
 	return 0;
 }
 int gtp_retrans(struct gsn_t *gsn)
 {
 	/* dummy API, deprecated. */
 	return 0;
 }
 int gtp_retranstimeout(struct gsn_t *gsn, struct timeval *timeout)
 {
 	timeout->tv_sec = 24*60*60;
 	timeout->tv_usec = 0;
 	/* dummy API, deprecated. Return a huge timer to do nothing */
 	return 0;
 }
--- a/gtp/gsn_internal.h
+++ b/gtp/gsn_internal.h
@@ -0,0 +1,3 @@
 #pragma once
 void gtp_queue_timer_start(struct gsn_t *gsn);
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
--- a/gtp/gtp_internal.h
+++ b/gtp/gtp_internal.h
@@ -0,0 +1,8 @@
 #pragma once
 #include <stdint.h>
 #include <talloc.h>
 uint64_t gtp_imsi_str2gtp(const char *str);
 extern TALLOC_CTX *tall_libgtp_ctx;
--- a/gtp/gtpie.c
+++ b/gtp/gtpie.c
@@ -1,17 +1,17 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002 Mondru AB.
- * 
+ *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 /*
- * gtpie.c: Contains functions to encapsulate and decapsulate GTP 
+ * gtpie.c: Contains functions to encapsulate and decapsulate GTP
- * information elements 
+ * information elements
 *
 *
 * Encapsulation
@@ -37,10 +37,18 @@
 #include <netinet/in.h>
 #include <string.h>
-#include "gtpie.h"
+#include <osmocom/gtp/gtpie.h>
 /*! Encode a TLV type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] l Length of value \a v in bytes
 *  \param[in] v Pointer to input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tlv(void *p, unsigned int *length, unsigned int size, uint8_t t,
-	      int l, void *v)
+	      int l, const void *v)
 {
 	if ((*length + 3 + l) >= size)
 		return 1;
@@ -51,8 +59,16 @@ int gtpie_tlv(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Encode a TV0 (Tag + value) type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] l Length of value \a v in bytes
 *  \param[in] v Pointer to input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tv0(void *p, unsigned int *length, unsigned int size, uint8_t t,
-	      int l, uint8_t * v)
+	      int l, const uint8_t * v)
 {
 	if ((*length + 1 + l) >= size)
 		return 1;
@@ -62,6 +78,13 @@ int gtpie_tv0(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Encode a TV1 (Tag + 8bit value) type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] v Input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tv1(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	      uint8_t v)
 {
@@ -73,6 +96,13 @@ int gtpie_tv1(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Encode a TV2 (Tag + 16bit value) type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] v Input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tv2(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	      uint16_t v)
 {
@@ -84,6 +114,13 @@ int gtpie_tv2(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Encode a TV4 (Tag + 32bit value) type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] v Input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tv4(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	      uint32_t v)
 {
@@ -95,6 +132,13 @@ int gtpie_tv4(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Encode a TV8 (Tag + 64bit value) type Information Element.
 *  \param[inout] p Pointer to output packet to which IE is appended
 *  \param[inout] length Up to which byte length is \a p used/filled
 *  \param[in] size Total size of \a p in bytes
 *  \param[in] t Tag / Information Element Identifier
 *  \param[in] v Input value
 *  \returns 0 on success, 1 on error */
 int gtpie_tv8(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	      uint64_t v)
 {
@@ -106,6 +150,11 @@ int gtpie_tv8(void *p, unsigned int *length, unsigned int size, uint8_t t,
 	return 0;
 }
 /*! Obtain a GTP IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \returns index into \a ie on success; -1 if not found */
 int gtpie_getie(union gtpie_member *ie[], int type, int instance)
 {
 	int j;
@@ -118,6 +167,11 @@ int gtpie_getie(union gtpie_member *ie[], int type, int instance)
 	return -1;
 }
 /*! Determine if IE for a given tag/IEI exists in a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \returns 1 if IEI instance present in \a ie; 0 if not */
 int gtpie_exist(union gtpie_member *ie[], int type, int instance)
 {
 	int j;
@@ -130,6 +184,14 @@ int gtpie_exist(union gtpie_member *ie[], int type, int instance)
 	return 0;
 }
 /*! Obtain Value of TLV-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[out] length Length of IE
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \param[in] size Size of \a dst in bytes
 *  \returns 0 on sucess; EOF in case value is larger than \a size */
 int gtpie_gettlv(union gtpie_member *ie[], int type, int instance,
 		 unsigned int *length, void *dst, unsigned int size)
 {
@@ -145,6 +207,13 @@ int gtpie_gettlv(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
 /*! Obtain Value of TV0-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \param[in] size Size of value in bytes
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_gettv0(union gtpie_member *ie[], int type, int instance,
 		 void *dst, unsigned int size)
 {
@@ -157,6 +226,12 @@ int gtpie_gettv0(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
 /*! Obtain Value of TV1-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_gettv1(union gtpie_member *ie[], int type, int instance,
 		 uint8_t * dst)
 {
@@ -169,6 +244,12 @@ int gtpie_gettv1(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
 /*! Obtain Value of TV2-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_gettv2(union gtpie_member *ie[], int type, int instance,
 		 uint16_t * dst)
 {
@@ -181,6 +262,12 @@ int gtpie_gettv2(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
 /*! Obtain Value of TV4-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_gettv4(union gtpie_member *ie[], int type, int instance,
 		 uint32_t * dst)
 {
@@ -193,6 +280,12 @@ int gtpie_gettv4(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
 /*! Obtain Value of TV8-type IE for a given tag/IEI from a list/array.
 *  \param[in] ie Array of GTPIE
 *  \param[in] type Tag/IEI for which we're looking
 *  \param[in] instance Instance (number of occurence) of this IEI
 *  \param[inout] dst Caller-allocated buffer where to store value
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_gettv8(union gtpie_member *ie[], int type, int instance,
 		 uint64_t * dst)
 {
@@ -205,13 +298,19 @@ int gtpie_gettv8(union gtpie_member *ie[], int type, int instance,
 	return 0;
 }
-int gtpie_decaps(union gtpie_member *ie[], int version, void *pack,
+/*! Parse an incoming GTP packet into its Information Elements.
 *  \param[out] ie Caller-allocated Array of GTPIE
 *  \param[in] version GTP protocol version
 *  \param[in] pack Pointer to raw GTP packet (payload part)
 *  \param[in] len Length of \a pack in bytes
 *  \returns 0 on sucess; EOF in case IE not found */
 int gtpie_decaps(union gtpie_member *ie[], int version, const void *pack,
 		 unsigned len)
 {
 	int i;
 	int j = 0;
-	unsigned char *p;
+	const unsigned char *p;
-	unsigned char *end;
+	const unsigned char *end;
 	end = (unsigned char *)pack + len;
 	p = pack;
@@ -243,6 +342,7 @@ int gtpie_decaps(union gtpie_member *ie[], int version, void *pack,
 		case GTPIE_RP_SMS:
 		case GTPIE_RP:
 		case GTPIE_MS_NOT_REACH:
 		case GTPIE_BCM:
 			if (j < GTPIE_SIZE) {
 				ie[j] = (union gtpie_member *)p;
 				if (GTPIE_DEBUG)
@@ -390,11 +490,76 @@ int gtpie_decaps(union gtpie_member *ie[], int version, void *pack,
 		case GTPIE_RAB_SETUP:
 		case GTPIE_TRIGGER_ID:
 		case GTPIE_OMC_ID:
-		case GTPIE_CHARGING_ADDR:
+		case GTPIE_RAN_T_CONTAIN:
 		case GTPIE_PDP_CTX_PRIO:
 		case GTPIE_ADDL_RAB_S_I:
 		case GTPIE_SGSN_NUMBER:
 		case GTPIE_COMMON_FLAGS:
 		case GTPIE_APN_RESTR:
 		case GTPIE_R_PRIO_LCS:
 		case GTPIE_RAT_TYPE:
 		case GTPIE_USER_LOC:
 		case GTPIE_MS_TZ:
 		case GTPIE_IMEI_SV:
 		case GTPIE_CML_CHG_I_CT:
 		case GTPIE_MBMS_UE_CTX:
 		case GTPIE_TMGI:
 		case GTPIE_RIM_ROUT_ADDR:
 		case GTPIE_MBMS_PCO:
 		case GTPIE_MBMS_SA:
 		case GTPIE_SRNC_PDCP_CTX:
 		case GTPIE_ADDL_TRACE:
 		case GTPIE_HOP_CTR:
 		case GTPIE_SEL_PLMN_ID:
 		case GTPIE_MBMS_SESS_ID:
 		case GTPIE_MBMS_2_3G_IND:
 		case GTPIE_ENH_NSAPI:
 		case GTPIE_MBMS_SESS_DUR:
 		case GTPIE_A_MBMS_TRAC_I:
 		case GTPIE_MBMS_S_REP_N:
 		case GTPIE_MBMS_TTDT:
 		case GTPIE_PS_HO_REQ_CTX:
 		case GTPIE_BSS_CONTAINER:
 		case GTPIE_CELL_ID:
 		case GTPIE_PDU_NUMBERS:
 		case GTPIE_BSSGP_CAUSE:
 		case GTPIE_RQD_MBMS_BCAP:
 		case GTPIE_RIM_RA_DISCR:
 		case GTPIE_L_SETUP_PFCS:
 		case GTPIE_PS_HO_XID_PAR:
 		case GTPIE_MS_CHG_REP_A:
 		case GTPIE_DIR_TUN_FLAGS:
 		case GTPIE_CORREL_ID:
 		case GTPIE_MBMS_FLOWI:
 		case GTPIE_MBMS_MC_DIST:
 		case GTPIE_MBMS_DIST_ACK:
 		case GTPIE_R_IRAT_HO_INF:
 		case GTPIE_RFSP_IDX:
 		case GTPIE_FQDN:
 		case GTPIE_E_ALL_PRIO_1:
 		case GTPIE_E_ALL_PRIO_2:
 		case GTPIE_E_CMN_FLAGS:
 		case GTPIE_U_CSG_INFO:
 		case GTPIE_CSG_I_REP_ACT:
 		case GTPIE_CSG_ID:
 		case GTPIE_CSG_MEMB_IND:
 		case GTPIE_AMBR:
 		case GTPIE_UE_NET_CAPA:
 		case GTPIE_UE_AMBR:
 		case GTPIE_APN_AMBR_NS:
 		case GTPIE_GGSN_BACKOFF:
 		case GTPIE_S_PRIO_IND:
 		case GTPIE_S_PRIO_IND_NS:
 		case GTPIE_H_BR_16MBPS_F:
 		case GTPIE_A_MMCTX_SRVCC:
 		case GTPIE_A_FLAGS_SRVCC:
 		case GTPIE_STN_SR:
 		case GTPIE_C_MSISDN:
 		case GTPIE_E_RANAP_CAUSE:
 		case GTPIE_ENODEB_ID:
 		case GTPIE_SEL_MODE_NS:
 		case GTPIE_ULI_TIMESTAMP:
 		case GTPIE_CHARGING_ADDR:
 		case GTPIE_PRIVATE:
 			if (j < GTPIE_SIZE) {
 				ie[j] = (union gtpie_member *)p;
@@ -429,12 +594,16 @@ int gtpie_decaps(union gtpie_member *ie[], int version, void *pack,
 	}
 }
 /*! Encode GTP packet payload from Array of Information Elements.
 *  \param[out] ie Input Array of GTPIE
 *  \param[out] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length)
 *  \param[out] len Encoded length of \a pack in bytes
 *  \returns 0 on sucess; 2 for out-of-space */
 int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 {
 	int i;
 	unsigned char *p;
 	unsigned char *end;
 	union gtpie_member *m;
 	int iesize;
 	p = pack;
@@ -445,7 +614,6 @@ int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 		if (ie[i] != 0) {
 			if (GTPIE_DEBUG)
 				printf("gtpie_encaps. Type %d\n", i);
 			m = (union gtpie_member *)p;
 			switch (i) {
 			case GTPIE_CAUSE:	/* TV GTPIE types with value length 1 */
 			case GTPIE_REORDER:
@@ -459,6 +627,7 @@ int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 			case GTPIE_RP_SMS:
 			case GTPIE_RP:
 			case GTPIE_MS_NOT_REACH:
 			case GTPIE_BCM:
 				iesize = 2;
 				break;
 			case GTPIE_FL_DI:	/* TV GTPIE types with value length 2 */
@@ -483,11 +652,13 @@ int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 			case GTPIE_TEI_DII:	/* TV GTPIE types with value length 5 */
 				iesize = 6;
 				break;
 			case GTPIE_RAI:		/* TV GTPIE types with value length 6 */
 				iesize = 7;
 				break;
 			case GTPIE_RAB_CONTEXT:	/* TV GTPIE types with value length 7 */
 				iesize = 8;
 				break;
 			case GTPIE_IMSI:	/* TV GTPIE types with value length 8 */
 			case GTPIE_RAI:
 				iesize = 9;
 				break;
 			case GTPIE_AUTH_TRIPLET:	/* TV GTPIE types with value length 28 */
@@ -511,6 +682,75 @@ int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 			case GTPIE_RAB_SETUP:
 			case GTPIE_TRIGGER_ID:
 			case GTPIE_OMC_ID:
 			case GTPIE_RAN_T_CONTAIN:
 			case GTPIE_PDP_CTX_PRIO:
 			case GTPIE_ADDL_RAB_S_I:
 			case GTPIE_SGSN_NUMBER:
 			case GTPIE_COMMON_FLAGS:
 			case GTPIE_APN_RESTR:
 			case GTPIE_R_PRIO_LCS:
 			case GTPIE_RAT_TYPE:
 			case GTPIE_USER_LOC:
 			case GTPIE_MS_TZ:
 			case GTPIE_IMEI_SV:
 			case GTPIE_CML_CHG_I_CT:
 			case GTPIE_MBMS_UE_CTX:
 			case GTPIE_TMGI:
 			case GTPIE_RIM_ROUT_ADDR:
 			case GTPIE_MBMS_PCO:
 			case GTPIE_MBMS_SA:
 			case GTPIE_SRNC_PDCP_CTX:
 			case GTPIE_ADDL_TRACE:
 			case GTPIE_HOP_CTR:
 			case GTPIE_SEL_PLMN_ID:
 			case GTPIE_MBMS_SESS_ID:
 			case GTPIE_MBMS_2_3G_IND:
 			case GTPIE_ENH_NSAPI:
 			case GTPIE_MBMS_SESS_DUR:
 			case GTPIE_A_MBMS_TRAC_I:
 			case GTPIE_MBMS_S_REP_N:
 			case GTPIE_MBMS_TTDT:
 			case GTPIE_PS_HO_REQ_CTX:
 			case GTPIE_BSS_CONTAINER:
 			case GTPIE_CELL_ID:
 			case GTPIE_PDU_NUMBERS:
 			case GTPIE_BSSGP_CAUSE:
 			case GTPIE_RQD_MBMS_BCAP:
 			case GTPIE_RIM_RA_DISCR:
 			case GTPIE_L_SETUP_PFCS:
 			case GTPIE_PS_HO_XID_PAR:
 			case GTPIE_MS_CHG_REP_A:
 			case GTPIE_DIR_TUN_FLAGS:
 			case GTPIE_CORREL_ID:
 			case GTPIE_MBMS_FLOWI:
 			case GTPIE_MBMS_MC_DIST:
 			case GTPIE_MBMS_DIST_ACK:
 			case GTPIE_R_IRAT_HO_INF:
 			case GTPIE_RFSP_IDX:
 			case GTPIE_FQDN:
 			case GTPIE_E_ALL_PRIO_1:
 			case GTPIE_E_ALL_PRIO_2:
 			case GTPIE_E_CMN_FLAGS:
 			case GTPIE_U_CSG_INFO:
 			case GTPIE_CSG_I_REP_ACT:
 			case GTPIE_CSG_ID:
 			case GTPIE_CSG_MEMB_IND:
 			case GTPIE_AMBR:
 			case GTPIE_UE_NET_CAPA:
 			case GTPIE_UE_AMBR:
 			case GTPIE_APN_AMBR_NS:
 			case GTPIE_GGSN_BACKOFF:
 			case GTPIE_S_PRIO_IND:
 			case GTPIE_S_PRIO_IND_NS:
 			case GTPIE_H_BR_16MBPS_F:
 			case GTPIE_A_MMCTX_SRVCC:
 			case GTPIE_A_FLAGS_SRVCC:
 			case GTPIE_STN_SR:
 			case GTPIE_C_MSISDN:
 			case GTPIE_E_RANAP_CAUSE:
 			case GTPIE_ENODEB_ID:
 			case GTPIE_SEL_MODE_NS:
 			case GTPIE_ULI_TIMESTAMP:
 			case GTPIE_CHARGING_ADDR:
 			case GTPIE_PRIVATE:
 				iesize = 3 + hton16(ie[i]->tlv.l);
@@ -528,13 +768,18 @@ int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
 	return 0;
 }
 /*! Encode GTP packet payload from Array of Information Elements.
 *  \param[out] ie Input Array of GTPIE
 *  \param[in] size Size of ie
 *  \param[out] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length)
 *  \param[out] len Encoded length of \a pack in bytes
 *  \returns 0 on sucess; 2 for out-of-space */
 int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 		  void *pack, unsigned *len)
 {
 	unsigned int i, j;
 	unsigned char *p;
 	unsigned char *end;
 	union gtpie_member *m;
 	int iesize;
 	p = pack;
@@ -548,7 +793,6 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 					printf
 					    ("gtpie_encaps. Number %d, Type %d\n",
 					     i, ie[i].t);
 				m = (union gtpie_member *)p;
 				switch (ie[i].t) {
 				case GTPIE_CAUSE:	/* TV GTPIE types with value length 1 */
 				case GTPIE_REORDER:
@@ -562,6 +806,7 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 				case GTPIE_RP_SMS:
 				case GTPIE_RP:
 				case GTPIE_MS_NOT_REACH:
 				case GTPIE_BCM:
 					iesize = 2;
 					break;
 				case GTPIE_PFI:	/* TV GTPIE types with value length 2 */
@@ -578,16 +823,19 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 				case GTPIE_P_TMSI:
 				case GTPIE_TEI_DI:
 				case GTPIE_TEI_C:
 				case GTPIE_CHARGING_ID:
 					iesize = 5;
 					break;
 				case GTPIE_TEI_DII:	/* TV GTPIE types with value length 5 */
 					iesize = 6;
 					break;
 				case GTPIE_RAI:		/* TV GTPIE types with value length 6 */
 					iesize = 7;
 					break;
 				case GTPIE_RAB_CONTEXT:	/* TV GTPIE types with value length 7 */
 					iesize = 8;
 					break;
 				case GTPIE_IMSI:	/* TV GTPIE types with value length 8 */
 				case GTPIE_RAI:
 					iesize = 9;
 					break;
 				case GTPIE_AUTH_TRIPLET:	/* TV GTPIE types with value length 28 */
@@ -596,8 +844,7 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 				case GTPIE_EXT_HEADER_T:	/* GTP extension header */
 					iesize = 2 + hton8(ie[i].ext.l);
 					break;
-				case GTPIE_CHARGING_ID:	/* TLV GTPIE types with length length 2 */
+				case GTPIE_EUA:	/* TLV GTPIE types with length length 2 */
 				case GTPIE_EUA:
 				case GTPIE_MM_CONTEXT:
 				case GTPIE_PDP_CONTEXT:
 				case GTPIE_APN:
@@ -612,6 +859,75 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 				case GTPIE_RAB_SETUP:
 				case GTPIE_TRIGGER_ID:
 				case GTPIE_OMC_ID:
 				case GTPIE_RAN_T_CONTAIN:
 				case GTPIE_PDP_CTX_PRIO:
 				case GTPIE_ADDL_RAB_S_I:
 				case GTPIE_SGSN_NUMBER:
 				case GTPIE_COMMON_FLAGS:
 				case GTPIE_APN_RESTR:
 				case GTPIE_R_PRIO_LCS:
 				case GTPIE_RAT_TYPE:
 				case GTPIE_USER_LOC:
 				case GTPIE_MS_TZ:
 				case GTPIE_IMEI_SV:
 				case GTPIE_CML_CHG_I_CT:
 				case GTPIE_MBMS_UE_CTX:
 				case GTPIE_TMGI:
 				case GTPIE_RIM_ROUT_ADDR:
 				case GTPIE_MBMS_PCO:
 				case GTPIE_MBMS_SA:
 				case GTPIE_SRNC_PDCP_CTX:
 				case GTPIE_ADDL_TRACE:
 				case GTPIE_HOP_CTR:
 				case GTPIE_SEL_PLMN_ID:
 				case GTPIE_MBMS_SESS_ID:
 				case GTPIE_MBMS_2_3G_IND:
 				case GTPIE_ENH_NSAPI:
 				case GTPIE_MBMS_SESS_DUR:
 				case GTPIE_A_MBMS_TRAC_I:
 				case GTPIE_MBMS_S_REP_N:
 				case GTPIE_MBMS_TTDT:
 				case GTPIE_PS_HO_REQ_CTX:
 				case GTPIE_BSS_CONTAINER:
 				case GTPIE_CELL_ID:
 				case GTPIE_PDU_NUMBERS:
 				case GTPIE_BSSGP_CAUSE:
 				case GTPIE_RQD_MBMS_BCAP:
 				case GTPIE_RIM_RA_DISCR:
 				case GTPIE_L_SETUP_PFCS:
 				case GTPIE_PS_HO_XID_PAR:
 				case GTPIE_MS_CHG_REP_A:
 				case GTPIE_DIR_TUN_FLAGS:
 				case GTPIE_CORREL_ID:
 				case GTPIE_MBMS_FLOWI:
 				case GTPIE_MBMS_MC_DIST:
 				case GTPIE_MBMS_DIST_ACK:
 				case GTPIE_R_IRAT_HO_INF:
 				case GTPIE_RFSP_IDX:
 				case GTPIE_FQDN:
 				case GTPIE_E_ALL_PRIO_1:
 				case GTPIE_E_ALL_PRIO_2:
 				case GTPIE_E_CMN_FLAGS:
 				case GTPIE_U_CSG_INFO:
 				case GTPIE_CSG_I_REP_ACT:
 				case GTPIE_CSG_ID:
 				case GTPIE_CSG_MEMB_IND:
 				case GTPIE_AMBR:
 				case GTPIE_UE_NET_CAPA:
 				case GTPIE_UE_AMBR:
 				case GTPIE_APN_AMBR_NS:
 				case GTPIE_GGSN_BACKOFF:
 				case GTPIE_S_PRIO_IND:
 				case GTPIE_S_PRIO_IND_NS:
 				case GTPIE_H_BR_16MBPS_F:
 				case GTPIE_A_MMCTX_SRVCC:
 				case GTPIE_A_FLAGS_SRVCC:
 				case GTPIE_STN_SR:
 				case GTPIE_C_MSISDN:
 				case GTPIE_E_RANAP_CAUSE:
 				case GTPIE_ENODEB_ID:
 				case GTPIE_SEL_MODE_NS:
 				case GTPIE_ULI_TIMESTAMP:
 				case GTPIE_CHARGING_ADDR:
 				case GTPIE_PRIVATE:
 					iesize = 3 + hton16(ie[i].tlv.l);
@@ -628,3 +944,189 @@ int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 			}
 	return 0;
 }
 /*! Encode GTP packet payload from Array of Information Elements.
 *  \param[in] ie Input Array of GTPIE
 *  \param[in] ie_len Length of \a ie array
 *  \param[in] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length)
 *  \param[in] pack_len Length of \a pack buffer
 *  \param[out] encoded_len Encoded length of \a pack in bytes
 *  \returns 0 on success; 2 for out-of-space
 *  GTP requires a certain order, the call must follow those which are defined for every message */
 int gtpie_encaps3(union gtpie_member *ies[], unsigned int ie_len,
 		  void *pack, unsigned pack_len, unsigned *encoded_len)
 {
 	unsigned int i;
 	unsigned char *p;
 	unsigned char *end;
 	int iesize;
 	union gtpie_member *ie;
 	*encoded_len = 0;
 	p = pack;
 	memset(pack, 0, pack_len);
 	end = p + pack_len;
 	for (i = 0; i < ie_len; i++) {
 		if (!ies[i])
 			continue;
 		ie = ies[i];
 		if (GTPIE_DEBUG)
 			printf
 			    ("gtpie_encaps. Number %d, Type %d\n",
 			     i, ie->t);
 		switch (ie->t) {
 		case GTPIE_CAUSE:	/* TV GTPIE types with value length 1 */
 		case GTPIE_REORDER:
 		case GTPIE_MAP_CAUSE:
 		case GTPIE_MS_VALIDATED:
 		case GTPIE_RECOVERY:
 		case GTPIE_SELECTION_MODE:
 		case GTPIE_TEARDOWN:
 		case GTPIE_NSAPI:
 		case GTPIE_RANAP_CAUSE:
 		case GTPIE_RP_SMS:
 		case GTPIE_RP:
 		case GTPIE_MS_NOT_REACH:
 		case GTPIE_BCM:
 			iesize = 2;
 			break;
 		case GTPIE_PFI:	/* TV GTPIE types with value length 2 */
 		case GTPIE_CHARGING_C:
 		case GTPIE_TRACE_REF:
 		case GTPIE_TRACE_TYPE:
 			iesize = 3;
 			break;
 		case GTPIE_QOS_PROFILE0:	/* TV GTPIE types with value length 3 */
 		case GTPIE_P_TMSI_S:
 			iesize = 4;
 			break;
 		case GTPIE_TLLI:	/* TV GTPIE types with value length 4 */
 		case GTPIE_P_TMSI:
 		case GTPIE_TEI_DI:
 		case GTPIE_TEI_C:
 		case GTPIE_CHARGING_ID:
 			iesize = 5;
 			break;
 		case GTPIE_TEI_DII:	/* TV GTPIE types with value length 5 */
 			iesize = 6;
 			break;
 		case GTPIE_RAI:		/* TV GTPIE types with value length 6 */
 			iesize = 7;
 			break;
 		case GTPIE_RAB_CONTEXT:	/* TV GTPIE types with value length 7 */
 			iesize = 8;
 			break;
 		case GTPIE_IMSI:	/* TV GTPIE types with value length 8 */
 			iesize = 9;
 			break;
 		case GTPIE_AUTH_TRIPLET:	/* TV GTPIE types with value length 28 */
 			iesize = 29;
 			break;
 		case GTPIE_EXT_HEADER_T:	/* GTP extension header */
 			iesize = 2 + hton8(ie->ext.l);
 			break;
 		case GTPIE_EUA:	/* TLV GTPIE types with length length 2 */
 		case GTPIE_MM_CONTEXT:
 		case GTPIE_PDP_CONTEXT:
 		case GTPIE_APN:
 		case GTPIE_PCO:
 		case GTPIE_GSN_ADDR:
 		case GTPIE_MSISDN:
 		case GTPIE_QOS_PROFILE:
 		case GTPIE_AUTH_QUINTUP:
 		case GTPIE_TFT:
 		case GTPIE_TARGET_INF:
 		case GTPIE_UTRAN_TRANS:
 		case GTPIE_RAB_SETUP:
 		case GTPIE_TRIGGER_ID:
 		case GTPIE_OMC_ID:
 		case GTPIE_RAN_T_CONTAIN:
 		case GTPIE_PDP_CTX_PRIO:
 		case GTPIE_ADDL_RAB_S_I:
 		case GTPIE_SGSN_NUMBER:
 		case GTPIE_COMMON_FLAGS:
 		case GTPIE_APN_RESTR:
 		case GTPIE_R_PRIO_LCS:
 		case GTPIE_RAT_TYPE:
 		case GTPIE_USER_LOC:
 		case GTPIE_MS_TZ:
 		case GTPIE_IMEI_SV:
 		case GTPIE_CML_CHG_I_CT:
 		case GTPIE_MBMS_UE_CTX:
 		case GTPIE_TMGI:
 		case GTPIE_RIM_ROUT_ADDR:
 		case GTPIE_MBMS_PCO:
 		case GTPIE_MBMS_SA:
 		case GTPIE_SRNC_PDCP_CTX:
 		case GTPIE_ADDL_TRACE:
 		case GTPIE_HOP_CTR:
 		case GTPIE_SEL_PLMN_ID:
 		case GTPIE_MBMS_SESS_ID:
 		case GTPIE_MBMS_2_3G_IND:
 		case GTPIE_ENH_NSAPI:
 		case GTPIE_MBMS_SESS_DUR:
 		case GTPIE_A_MBMS_TRAC_I:
 		case GTPIE_MBMS_S_REP_N:
 		case GTPIE_MBMS_TTDT:
 		case GTPIE_PS_HO_REQ_CTX:
 		case GTPIE_BSS_CONTAINER:
 		case GTPIE_CELL_ID:
 		case GTPIE_PDU_NUMBERS:
 		case GTPIE_BSSGP_CAUSE:
 		case GTPIE_RQD_MBMS_BCAP:
 		case GTPIE_RIM_RA_DISCR:
 		case GTPIE_L_SETUP_PFCS:
 		case GTPIE_PS_HO_XID_PAR:
 		case GTPIE_MS_CHG_REP_A:
 		case GTPIE_DIR_TUN_FLAGS:
 		case GTPIE_CORREL_ID:
 		case GTPIE_MBMS_FLOWI:
 		case GTPIE_MBMS_MC_DIST:
 		case GTPIE_MBMS_DIST_ACK:
 		case GTPIE_R_IRAT_HO_INF:
 		case GTPIE_RFSP_IDX:
 		case GTPIE_FQDN:
 		case GTPIE_E_ALL_PRIO_1:
 		case GTPIE_E_ALL_PRIO_2:
 		case GTPIE_E_CMN_FLAGS:
 		case GTPIE_U_CSG_INFO:
 		case GTPIE_CSG_I_REP_ACT:
 		case GTPIE_CSG_ID:
 		case GTPIE_CSG_MEMB_IND:
 		case GTPIE_AMBR:
 		case GTPIE_UE_NET_CAPA:
 		case GTPIE_UE_AMBR:
 		case GTPIE_APN_AMBR_NS:
 		case GTPIE_GGSN_BACKOFF:
 		case GTPIE_S_PRIO_IND:
 		case GTPIE_S_PRIO_IND_NS:
 		case GTPIE_H_BR_16MBPS_F:
 		case GTPIE_A_MMCTX_SRVCC:
 		case GTPIE_A_FLAGS_SRVCC:
 		case GTPIE_STN_SR:
 		case GTPIE_C_MSISDN:
 		case GTPIE_E_RANAP_CAUSE:
 		case GTPIE_ENODEB_ID:
 		case GTPIE_SEL_MODE_NS:
 		case GTPIE_ULI_TIMESTAMP:
 		case GTPIE_CHARGING_ADDR:
 		case GTPIE_PRIVATE:
 			iesize = 3 + hton16(ie->tlv.l);
 			break;
 		default:
 			return 2;	/* We received something unknown */
 		}
 		if (p + iesize < end) {
 			memcpy(p, ie, iesize);
 			p += iesize;
 			*encoded_len += iesize;
 		} else
 			return 2;	/* Out of space */
 	}
 	return 0;
 }
--- a/gtp/pdp.c
+++ b/gtp/pdp.c
@@ -1,16 +1,17 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
- * 
+ *  Copyright (C) 2017 Harald Welte <laforge@gnumonks.org>
 *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 /*
- * pdp.c: 
+ * pdp.c:
 *
 */
@@ -26,32 +27,29 @@
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <string.h>
-#include "pdp.h"
+#include <inttypes.h>
 #include <osmocom/gtp/pdp.h>
 #include <osmocom/gtp/gtp.h>
 #include "lookupa.h"
-
+#include "queue.h"
 /* ***********************************************************
 * Global variables TODO: most should be moved to gsn_t
 *************************************************************/
 static struct pdp_t pdpa[PDP_MAX];	/* PDP storage */
 static struct pdp_t *hashtid[PDP_MAX];	/* Hash table for IMSI + NSAPI */
 /* struct pdp_t* haship[PDP_MAX];  Hash table for IP and network interface */
 /* ***********************************************************
 * Functions related to PDP storage
 *
 * Lifecycle
- * For a GGSN pdp context life begins with the reception of a 
+ * For a GGSN pdp context life begins with the reception of a
 * create pdp context request. It normally ends with the reception
 * of a delete pdp context request, but will also end with the
- * reception of an error indication message. 
+ * reception of an error indication message.
 * Provisions should probably be made for terminating pdp contexts
- * based on either idle timeout, or by sending downlink probe 
+ * based on either idle timeout, or by sending downlink probe
 * messages (ping?) to see if the MS is still responding.
- * 
+ *
 * For an SGSN pdp context life begins with the application just
 * before sending off a create pdp context request. It normally
- * ends when a delete pdp context response message is received 
+ * ends when a delete pdp context response message is received
 * from the GGSN, but should also end when with the reception of
 * an error indication message.
 *
@@ -61,15 +59,15 @@ static struct pdp_t *hashtid[PDP_MAX];	/* Hash table for IMSI + NSAPI */
 * Downlink packets received in the GGSN are identified only by their
 * network interface together with their destination IP address (Two
 * network interfaces can use the same private IP address). Each IMSI
- * (mobile station) can have several PDP contexts using the same IP 
+ * (mobile station) can have several PDP contexts using the same IP
 * address. In this case the traffic flow template (TFT) is used to
- * determine the correct PDP context for a particular IMSI. Also it 
+ * determine the correct PDP context for a particular IMSI. Also it
 * should be possible for each PDP context to use several IP adresses
 * For fixed wireless access a mobile station might need a full class
 * C network. Even in the case of several IP adresses the PDP context
 * should be determined on the basis of the network IP address.
 * Thus we need a hash table based on network interface + IP address.
- * 
+ *
 * Uplink packets are for GTP0 identified by their IMSI and NSAPI, which
 * is collectively called the tunnel identifier. There is also a 16 bit
 * flow label that can be used for identification of uplink packets. This
@@ -82,7 +80,7 @@ static struct pdp_t *hashtid[PDP_MAX];	/* Hash table for IMSI + NSAPI */
 * Thus we need a hash table based on TID (IMSI and NSAPI). The TEID will
 * be used for directly addressing the PDP context.
- * pdp_newpdp 
+ * pdp_newpdp
 * Gives you a pdp context with no hash references In some way
 * this should have a limited lifetime.
 *
@@ -109,11 +107,16 @@ static struct pdp_t *hashtid[PDP_MAX];	/* Hash table for IMSI + NSAPI */
 *
 *************************************************************/
-int pdp_init()
+static struct gsn_t *g_gsn;
 int pdp_init(struct gsn_t *gsn)
 {
-	memset(&pdpa, 0, sizeof(pdpa));
+	if (!g_gsn) {
-	memset(&hashtid, 0, sizeof(hashtid));
+		g_gsn = gsn;
-	/*  memset(&haship, 0, sizeof(haship)); */
+	} else {
 		LOGP(DLGTP, LOGL_FATAL, "This interface is depreacted and doesn't support multiple GGSN!");
 		return -1;
 	}
 	return 0;
 }
@@ -121,6 +124,13 @@ int pdp_init()
 int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
 	       struct pdp_t *pdp_old)
 {
 	return gtp_pdp_newpdp(g_gsn, pdp, imsi, nsapi, pdp_old);
 }
 int gtp_pdp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
 	       struct pdp_t *pdp_old)
 {
 	struct pdp_t *pdpa = gsn->pdpa;
 	int n;
 	for (n = 0; n < PDP_MAX; n++) {	/* TODO: Need to do better than linear search */
 		if (pdpa[n].inuse == 0) {
@@ -130,6 +140,7 @@ int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
 			else
 				memset(*pdp, 0, sizeof(struct pdp_t));
 			(*pdp)->inuse = 1;
 			(*pdp)->gsn = gsn;
 			(*pdp)->imsi = imsi;
 			(*pdp)->nsapi = nsapi;
 			(*pdp)->fllc = (uint16_t) n + 1;
@@ -146,7 +157,9 @@ int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
 				     1].secondary_tei[(*pdp)->nsapi & 0x0f] =
 				    (*pdp)->teid_own;
 			}
-
+			/* Default: Generate G-PDU sequence numbers on Tx */
 			(*pdp)->tx_gpdu_seq = true;
 			INIT_LLIST_HEAD(&(*pdp)->qmsg_list_req);
 			return 0;
 		}
 	}
@@ -155,6 +168,18 @@ int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
 int pdp_freepdp(struct pdp_t *pdp)
 {
 	struct qmsg_t *qmsg, *qmsg2;
 	struct pdp_t *pdpa = pdp->gsn->pdpa;
 	int rc;
 	/* Remove all enqueued messages belonging to this pdp from req tx transmit
 	   queue. queue_freemsg will call llist_del(). */
 	llist_for_each_entry_safe(qmsg, qmsg2, &pdp->qmsg_list_req, entry) {
 		if ((rc = queue_freemsg(pdp->gsn->queue_req, qmsg)))
 			LOGP(DLGTP, LOGL_ERROR,
 			     "Failed freeing qmsg from qmsg_list_req during pdp_freepdp()! %d\n", rc);
 	}
 	pdp_tiddel(pdp);
 	/* Remove any references in primary context */
@@ -169,12 +194,20 @@ int pdp_freepdp(struct pdp_t *pdp)
 int pdp_getpdp(struct pdp_t **pdp)
 {
-	*pdp = &pdpa[0];
+	*pdp = &g_gsn->pdpa[0];
 	return 0;
 }
 int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl)
 {
 	return gtp_pdp_getgtp0(g_gsn, pdp, fl);
 }
 int gtp_pdp_getgtp0(struct gsn_t *gsn, struct pdp_t **pdp, uint16_t fl)
 {
 	struct pdp_t *pdpa = gsn->pdpa;
 	if ((fl > PDP_MAX) || (fl < 1)) {
 		return EOF;	/* Not found */
 	} else {
@@ -189,6 +222,13 @@ int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl)
 int pdp_getgtp1(struct pdp_t **pdp, uint32_t tei)
 {
 	return gtp_pdp_getgtp1(g_gsn, pdp, tei);
 }
 int gtp_pdp_getgtp1(struct gsn_t *gsn, struct pdp_t **pdp, uint32_t tei)
 {
 	struct pdp_t *pdpa = gsn->pdpa;
 	if ((tei > PDP_MAX) || (tei < 1)) {
 		return EOF;	/* Not found */
 	} else {
@@ -201,6 +241,30 @@ int pdp_getgtp1(struct pdp_t **pdp, uint32_t tei)
 	}
 }
 /* get a PDP based on the *peer* address + TEI-Data.  Used for matching inbound Error Ind */
 int pdp_getgtp1_peer_d(struct pdp_t **pdp, const struct sockaddr_in *peer, uint32_t teid_gn)
 {
 	return gtp_pdp_getgtp1_peer_d(g_gsn, pdp, peer, teid_gn);
 }
 int gtp_pdp_getgtp1_peer_d(struct gsn_t *gsn, struct pdp_t **pdp, const struct sockaddr_in *peer, uint32_t teid_gn)
 {
 	struct pdp_t *pdpa = gsn->pdpa;
 	unsigned int i;
 	/* this is O(n) but we don't have (nor want) another hash... */
 	for (i = 0; i < PDP_MAX; i++) {
 		struct pdp_t *candidate = &pdpa[i];
 		if (candidate->inuse && candidate->teid_gn == teid_gn &&
 		    candidate->gsnru.l == sizeof(peer->sin_addr) &&
 		    !memcmp(&peer->sin_addr, candidate->gsnru.v, sizeof(peer->sin_addr))) {
 			*pdp = &pdpa[i];
 			return 0;
 		}
 	}
 	return EOF;
 }
 int pdp_tidhash(uint64_t tid)
 {
 	return (lookup(&tid, sizeof(tid), 0) % PDP_MAX);
@@ -208,10 +272,11 @@ int pdp_tidhash(uint64_t tid)
 int pdp_tidset(struct pdp_t *pdp, uint64_t tid)
 {
 	struct pdp_t **hashtid = pdp->gsn->hashtid;
 	int hash = pdp_tidhash(tid);
 	struct pdp_t *pdp2;
 	struct pdp_t *pdp_prev = NULL;
-	DEBUGP(DLGTP, "Begin pdp_tidset tid = %llx\n", tid);
+	DEBUGP(DLGTP, "Begin pdp_tidset tid = %"PRIx64"\n", tid);
 	pdp->tidnext = NULL;
 	pdp->tid = tid;
 	for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext)
@@ -226,10 +291,11 @@ int pdp_tidset(struct pdp_t *pdp, uint64_t tid)
 int pdp_tiddel(struct pdp_t *pdp)
 {
 	struct pdp_t **hashtid = pdp->gsn->hashtid;
 	int hash = pdp_tidhash(pdp->tid);
 	struct pdp_t *pdp2;
 	struct pdp_t *pdp_prev = NULL;
-	DEBUGP(DLGTP, "Begin pdp_tiddel tid = %llx\n", pdp->tid);
+	DEBUGP(DLGTP, "Begin pdp_tiddel tid = %"PRIx64"\n", pdp->tid);
 	for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext) {
 		if (pdp2 == pdp) {
 			if (!pdp_prev)
@@ -247,9 +313,15 @@ int pdp_tiddel(struct pdp_t *pdp)
 int pdp_tidget(struct pdp_t **pdp, uint64_t tid)
 {
 	return gtp_pdp_tidget(g_gsn, pdp, tid);
 }
 int gtp_pdp_tidget(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t tid)
 {
 	struct pdp_t **hashtid = gsn->hashtid;
 	int hash = pdp_tidhash(tid);
 	struct pdp_t *pdp2;
-	DEBUGP(DLGTP, "Begin pdp_tidget tid = %llx\n", tid);
+	DEBUGP(DLGTP, "Begin pdp_tidget tid = %"PRIx64"\n", tid);
 	for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext) {
 		if (pdp2->tid == tid) {
 			*pdp = pdp2;
@@ -263,102 +335,17 @@ int pdp_tidget(struct pdp_t **pdp, uint64_t tid)
 int pdp_getimsi(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi)
 {
-	return pdp_tidget(pdp,
+	return gtp_pdp_getimsi(g_gsn, pdp, imsi, nsapi);
 			  (imsi & 0x0fffffffffffffffull) +
 			  ((uint64_t) nsapi << 60));
 }
-/*
+int gtp_pdp_getimsi(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi)
-int pdp_iphash(void* ipif, struct ul66_t *eua) {
+{
-  /#printf("IPhash %ld\n", lookup(eua->v, eua->l, ipif) % PDP_MAX);#/
+	return gtp_pdp_tidget(gsn, pdp, pdp_gettid(imsi, nsapi));
  return (lookup(eua->v, eua->l, ipif) % PDP_MAX);
 }
 int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua) {
  int hash;
  struct pdp_t *pdp2;
  struct pdp_t *pdp_prev = NULL;
  if (PDP_DEBUG) printf("Begin pdp_ipset %d %d %2x%2x%2x%2x\n",
 			(unsigned) ipif, eua->l,
 			eua->v[2], eua->v[3], 
 			eua->v[4], eua->v[5]);
  pdp->ipnext = NULL;
  pdp->ipif = ipif;
  pdp->eua.l = eua->l;
  memcpy(pdp->eua.v, eua->v, eua->l);
  hash = pdp_iphash(pdp->ipif, &pdp->eua);
  for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext)
    pdp_prev = pdp2;
  if (!pdp_prev) 
    haship[hash] = pdp;
  else 
    pdp_prev->ipnext = pdp;
  if (PDP_DEBUG) printf("End pdp_ipset\n");
  return 0;
 }
 int pdp_ipdel(struct pdp_t *pdp) {
  int hash = pdp_iphash(pdp->ipif, &pdp->eua);
  struct pdp_t *pdp2;
  struct pdp_t *pdp_prev = NULL;
  if (PDP_DEBUG) printf("Begin pdp_ipdel\n");
  for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext) {
    if (pdp2 == pdp) {
      if (!pdp_prev) 
 	haship[hash] = pdp2->ipnext;
      else 
 	pdp_prev->ipnext = pdp2->ipnext;
      if (PDP_DEBUG) printf("End pdp_ipdel: PDP found\n");
      return 0;
    }
    pdp_prev = pdp2;
  }
  if (PDP_DEBUG) printf("End pdp_ipdel: PDP not found\n");
  return EOF; /# End of linked list and not found #/
 }
 int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua) {
  int hash = pdp_iphash(ipif, eua);
  struct pdp_t *pdp2;
  /#printf("Begin pdp_ipget %d %d %2x%2x%2x%2x\n", (unsigned)ipif, eua->l, 
    eua->v[2],eua->v[3],eua->v[4],eua->v[5]);#/
  for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext) {
    if ((pdp2->ipif == ipif) && (pdp2->eua.l == eua->l) && 
 	(memcmp(&pdp2->eua.v, &eua->v, eua->l) == 0)) {
      *pdp = pdp2;
      /#printf("End pdp_ipget. Found\n");#/
      return 0;
    }
  }
  if (PDP_DEBUG) printf("End pdp_ipget Notfound %d %d %2x%2x%2x%2x\n", 
 	 (unsigned)ipif, eua->l, eua->v[2],eua->v[3],eua->v[4],eua->v[5]);
  return EOF; /# End of linked list and not found #/
 }
 */
 /* Various conversion functions */
 int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua)
 {
 	eua->l = 6;
 	eua->v[0] = 0xf1;	/* IETF */
 	eua->v[1] = 0x21;	/* IPv4 */
 	memcpy(&eua->v[2], src, 4);	/* Copy a 4 byte address */
 	return 0;
 }
 int pdp_euaton(struct ul66_t *eua, struct in_addr *dst)
 {
 	if ((eua->l != 6) || (eua->v[0] != 0xf1) || (eua->v[1] != 0x21)) {
 		return EOF;
 	}
 	memcpy(dst, &eua->v[2], 4);	/* Copy a 4 byte address */
 	return 0;
 }
 uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi)
 {
 	return (imsi & 0x0fffffffffffffffull) + ((uint64_t) nsapi << 60);
@@ -370,13 +357,16 @@ void pdp_set_imsi_nsapi(struct pdp_t *pdp, uint64_t teid)
 	pdp->nsapi = (teid & 0xf000000000000000ull) >> 60;
 }
-int ulcpy(void *dst, void *src, size_t size)
+/* Count amount of secondary PDP contexts linked to this primary PDP context
 * (itself included). Must be called on a primary PDP context. */
 unsigned int pdp_count_secondary(const struct pdp_t *pdp)
 {
-	if (((struct ul255_t *)src)->l <= size) {
+	unsigned int n;
-		((struct ul255_t *)dst)->l = ((struct ul255_t *)src)->l;
+	unsigned int count = 0;
-		memcpy(((struct ul255_t *)dst)->v, ((struct ul255_t *)src)->v,
+	OSMO_ASSERT(!pdp->secondary);
-		       ((struct ul255_t *)dst)->l);
+
-		return 0;
+	for (n = 0; n < PDP_MAXNSAPI; n++)
-	} else
+		if (pdp->secondary_tei[n])
-		return EOF;
+			count++;
 	return count;
 }
--- a/gtp/queue.c
+++ b/gtp/queue.c
@@ -1,13 +1,14 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
 *  Copyright (C) 2011 Harald Welte <laforge@gnumonks.org>
- * 
+ *  Copyright (C) 2016 sysmocom - s.f.m.c. GmbH
 *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 /*
@@ -26,8 +27,10 @@
 #include <sys/time.h>
 #include <netinet/in.h>
 #include <string.h>
-#include "pdp.h"
+
-#include "gtp.h"
+#include <osmocom/gtp/pdp.h>
 #include <osmocom/gtp/gtp.h>
 #include "queue.h"
 /*! \brief dump a queue_t to stdout */
@@ -61,7 +64,7 @@ static int queue_seqhash(struct sockaddr_in *peer, uint16_t seq)
 	return seq % QUEUE_HASH_SIZE;
 }
-/*! \brief Insert a message with given sequence number into the hash
+/*! \brief Insert a message with given sequence number into the hash.
 *
 * This function sets the peer and the seq of the qmsg and then inserts
 * the qmsg into the queue hash.  To do so, it does a hashtable lookup
@@ -78,7 +81,7 @@ static int queue_seqset(struct queue_t *queue, struct qmsg_t *qmsg,
 	if (QUEUE_DEBUG)
 		printf("Begin queue_seqset seq = %d\n", (int)seq);
 	if (QUEUE_DEBUG)
-		printf("SIZEOF PEER %d, *PEER %d\n", sizeof(peer),
+		printf("SIZEOF PEER %zu, *PEER %zu\n", sizeof(peer),
 		       sizeof(*peer));
 	qmsg->seq = seq;
@@ -105,8 +108,7 @@ static int queue_seqdel(struct queue_t *queue, struct qmsg_t *qmsg)
 		printf("Begin queue_seqdel seq = %d\n", (int)qmsg->seq);
 	for (qmsg2 = queue->hashseq[hash]; qmsg2; qmsg2 = qmsg2->seqnext) {
-		/* FIXME: this is always true !?! */
+		if (qmsg == qmsg2) {
 		if (qmsg == qmsg) {
 			if (!qmsg_prev)
 				queue->hashseq[hash] = qmsg2->seqnext;
 			else
@@ -121,25 +123,30 @@ static int queue_seqdel(struct queue_t *queue, struct qmsg_t *qmsg)
 	return EOF;		/* End of linked list and not found */
 }
-/*! \brief Allocates and initialises new queue structure */
+/*! Allocates and initialises new queue structure.
 *  \param[out] queue pointer where to store the allocated object. Must be freed with queue_free
 *  \returns zero on success, non-zero on error
 */
 int queue_new(struct queue_t **queue)
 {
 	if (QUEUE_DEBUG)
 		printf("queue_new\n");
 	*queue = calloc(1, sizeof(struct queue_t));
 	if (!(*queue))
 		return EOF;
 	(*queue)->next = 0;
 	(*queue)->first = -1;
 	(*queue)->last = -1;
 	if (QUEUE_DEBUG)
 		queue_print(*queue);
-	if (*queue)
+	return 0;
 		return 0;
 	else
 		return EOF;
 }
-/*! \brief Deallocates queue structure */
+/*! Deallocates queue structure.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \returns zero on success, non-zero on error.
 */
 int queue_free(struct queue_t *queue)
 {
 	if (QUEUE_DEBUG)
@@ -150,7 +157,13 @@ int queue_free(struct queue_t *queue)
 	return 0;
 }
-/*! \brief Add a new message to the queue */
+/*! Add a new message to the queue.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \param[out] qmsg first message from the queue (if succeeds)
 *  \param[in] peer who sent the message to add
 *  \param[in] seq sequence number of the message to add
 *  \returns zero on success, non-zero on error.
 */
 int queue_newmsg(struct queue_t *queue, struct qmsg_t **qmsg,
 		 struct sockaddr_in *peer, uint16_t seq)
 {
@@ -161,6 +174,7 @@ int queue_newmsg(struct queue_t *queue, struct qmsg_t **qmsg,
 	} else {
 		*qmsg = &queue->qmsga[queue->next];
 		queue_seqset(queue, *qmsg, peer, seq);
 		INIT_LLIST_HEAD(&(*qmsg)->entry);
 		(*qmsg)->state = 1;	/* Space taken */
 		(*qmsg)->this = queue->next;
 		(*qmsg)->next = -1;	/* End of the queue */
@@ -177,7 +191,11 @@ int queue_newmsg(struct queue_t *queue, struct qmsg_t **qmsg,
 	}
 }
-/*! \brief Simply remoev a given qmsg_t from the queue
+
 /*! Remove an element from the queue.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \param[in] qmsg message to free
 *  \returns zero on success, non-zero on error.
 *
 * Internally, we first delete the entry from the queue, and then update
 * up our global queue->first / queue->last pointers.  Finally,
@@ -191,6 +209,8 @@ int queue_freemsg(struct queue_t *queue, struct qmsg_t *qmsg)
 		return EOF;	/* Not in queue */
 	}
 	llist_del(&qmsg->entry);
 	queue_seqdel(queue, qmsg);
 	if (qmsg->next == -1)	/* Are we the last in queue? */
@@ -211,7 +231,11 @@ int queue_freemsg(struct queue_t *queue, struct qmsg_t *qmsg)
 	return 0;
 }
-/*! \brief Move a given qmsg_t to the end of the queue ?!? */
+/*! Move a given qmsg_t to the end of the queue.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \param[in] qmsg message to move to the end of the queue
 *  \returns zero on success, non-zero on error.
 */
 int queue_back(struct queue_t *queue, struct qmsg_t *qmsg)
 {
 	if (QUEUE_DEBUG)
@@ -237,7 +261,11 @@ int queue_back(struct queue_t *queue, struct qmsg_t *qmsg)
 	return 0;
 }
-/*! \brief Get the first element in the entire queue */
+/*! Get the first element in the entire queue.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \param[out] qmsg first message from the queue (if succeeds)
 *  \returns zero on success, non-zero on error.
 */
 int queue_getfirst(struct queue_t *queue, struct qmsg_t **qmsg)
 {
 	/*printf("queue_getfirst\n"); */
@@ -251,27 +279,13 @@ int queue_getfirst(struct queue_t *queue, struct qmsg_t **qmsg)
 	return 0;
 }
-/*! \brief Linear search over entire queue to get given peer + seq*/
+/*! Get a queue entry for a given peer + seq.
-/* FIXME: unused, dead code! */
+ *  \param[in] queue pointer previously allocated by queue_new
-int queue_getseqx(struct queue_t *queue, struct qmsg_t **qmsg,
+ *  \param[out] qmsg first message from the queue (if succeeds)
-		  struct sockaddr_in *peer, uint16_t seq)
+ *  \param[in] peer who sent the message to retrieve
-{
+ *  \param[in] seq sequence number of the message to retrive
-	int n;
+ *  \returns zero on success, non-zero on error.
-	if (QUEUE_DEBUG)
+ */
 		printf("queue_getseq, %d\n", (int)seq);
 	if (QUEUE_DEBUG)
 		queue_print(queue);
 	for (n = 0; n < QUEUE_SIZE; n++) {
 		if ((queue->qmsga[n].seq == seq) &&
 		    (!memcmp(&queue->qmsga[n].peer, peer, sizeof(*peer)))) {
 			*qmsg = &queue->qmsga[n];
 			return 0;
 		}
 	}
 	return EOF;		/* Not found */
 }
 /*! \brief Get a queue entry for a given peer + seq */
 int queue_seqget(struct queue_t *queue, struct qmsg_t **qmsg,
 		 struct sockaddr_in *peer, uint16_t seq)
 {
@@ -293,7 +307,14 @@ int queue_seqget(struct queue_t *queue, struct qmsg_t **qmsg,
 	return EOF;		/* End of linked list and not found */
 }
-/*! \brief look-up a given seq/peer, return cbp + type and free entry */
+/*! look-up a given seq/peer, return cbp + type and free entry.
 *  \param[in] queue pointer previously allocated by queue_new
 *  \param[in] peer who sent the message to retrieve
 *  \param[in] seq sequence number of the message to retrive
 *  \param[out] type GTP message type
 *  \param[out] type callback pointer of the message
 *  \returns zero on success, non-zero on error.
 */
 int queue_freemsg_seq(struct queue_t *queue, struct sockaddr_in *peer,
 		      uint16_t seq, uint8_t * type, void **cbp)
 {
--- a/gtp/queue.h
+++ b/gtp/queue.h
@@ -1,12 +1,12 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002 Mondru AB.
- * 
+ *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 /*
@@ -17,9 +17,13 @@
 #ifndef _QUEUE_H
 #define _QUEUE_H
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/gtp/gtp.h>
 #define QUEUE_DEBUG 0		/* Print debug information */
-#define QUEUE_SIZE 1024		/* Size of retransmission queue */
+#define QUEUE_SIZE (PDP_MAX*2)	/* Size of retransmission queue */
 #define QUEUE_HASH_SIZE 65536	/* Size of hash table (2^16) */
 struct qmsg_t {			/* Holder for queued packets */
@@ -37,6 +41,7 @@ struct qmsg_t {			/* Holder for queued packets */
 	int this;		/* Pointer to myself */
 	time_t timeout;		/* When do we retransmit this packet? */
 	int retrans;		/* How many times did we retransmit this? */
 	struct llist_head entry; /* Listed with other qmsg_t belonging to a pdp_t->qmsg_list_req */
 };
 struct queue_t {
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -0,0 +1,3 @@
 SUBDIRS = \
 	osmocom \
 	$(NULL)
--- a/include/osmocom/Makefile.am
+++ b/include/osmocom/Makefile.am
@@ -0,0 +1,3 @@
 SUBDIRS = \
 	gtp \
 	$(NULL)
--- a/include/osmocom/gtp/Makefile.am
+++ b/include/osmocom/gtp/Makefile.am
@@ -0,0 +1,8 @@
 libgtp_HEADERS = \
 	gsn.h \
 	gtp.h \
 	gtpie.h \
 	pdp.h \
 	$(NULL)
 libgtpdir = $(includedir)/osmocom/gtp
--- a/include/osmocom/gtp/gsn.h
+++ b/include/osmocom/gtp/gsn.h
@@ -0,0 +1,181 @@
 /*
 *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
 *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
 *
 */
 #ifndef _GSN_H
 #define _GSN_H
 #include <osmocom/core/utils.h>
 #include <osmocom/core/defs.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/tdef.h>
 #include <osmocom/core/rate_ctr.h>
 #include "pdp.h"
 #define GTP_MODE_GGSN 1
 #define GTP_MODE_SGSN 2
 #define RESTART_FILE "gsn_restart"
 extern struct osmo_tdef gtp_T_defs[];
 /* ***********************************************************
 * Information storage for each gsn instance
 *
 * Normally each instance of the application corresponds to
 * one instance of a gsn.
 *
 * In order to avoid global variables in the application, and
 * also in order to allow several instances of a gsn in the same
 * application this struct is provided in order to store all
 * relevant information related to the gsn.
 *
 * Note that this does not include information storage for '
 * each pdp context. This is stored in another struct.
 *************************************************************/
 enum gsn_rate_ctr_keys {
 	GSN_CTR_ERR_SOCKET,
 	GSN_CTR_ERR_READFROM,	/* Number of readfrom errors */
 	GSN_CTR_ERR_SENDTO,	/* Number of sendto errors */
 	GSN_CTR_ERR_QUEUEFULL,	/* Number of times queue was full */
 	GSN_CTR_ERR_SEQ,	/* Number of seq out of range */
 	GSN_CTR_ERR_ADDRESS,	/* GSN address conversion failed */
 	GSN_CTR_ERR_UNKNOWN_PDP,	/* GSN address conversion failed */
 	GSN_CTR_ERR_UNEXPECTED_CAUSE,	/* Unexpected cause value received */
 	GSN_CTR_ERR_OUT_OF_PDP,	/* Out of storage for PDP contexts */
 	GSN_CTR_PKT_EMPTY,		/* Number of empty packets */
 	GSN_CTR_PKT_UNSUP,		/* Number of unsupported version 29.60 11.1.1 */
 	GSN_CTR_PKT_TOOSHORT,	/* Number of too short headers 29.60 11.1.2 */
 	GSN_CTR_PKT_UNKNOWN,	/* Number of unknown messages 29.60 11.1.3 */
 	GSN_CTR_PKT_UNEXPECT,	/* Number of unexpected messages 29.60 11.1.4 */
 	GSN_CTR_PKT_DUPLICATE,	/* Number of duplicate or unsolicited replies */
 	GSN_CTR_PKT_MISSING,	/* Number of missing information field messages */
 	GSN_CTR_PKT_INCORRECT,	/* Number of incorrect information field messages */
 	GSN_CTR_PKT_INVALID,	/* Number of invalid message format messages */
 };
 /* 3GPP TS 29.006 14.1, 14,2 */
 enum gtp_gsn_timers {
 	GTP_GSN_TIMER_T3_RESPONSE = 3,
 	GTP_GSN_TIMER_N3_REQUESTS = 1003,
 	GTP_GSN_TIMER_T3_HOLD_RESPONSE = -3,
 };
 struct gsn_t {
 	/* Parameters related to the network interface */
 	int fd0;		/* GTP0 file descriptor */
 	int fd1c;		/* GTP1 control plane file descriptor */
 	int fd1u;		/* GTP0 user plane file descriptor */
 	int mode;		/* Mode of operation: GGSN or SGSN */
 	struct in_addr gsnc;	/* IP address of this gsn for signalling */
 	struct in_addr gsnu;	/* IP address of this gsn for user traffic */
 	/* Parameters related to signalling messages */
 	uint16_t seq_next;	/* Next sequence number to use */
 	int seq_first;		/* First packet in queue (oldest timeout) */
 	int seq_last;		/* Last packet in queue (youngest timeout) */
 	unsigned char restart_counter;	/* Increment on restart. Stored on disk */
 	char *statedir;		/* Disk location for permanent storage */
 	void *priv;		/* used by libgtp users to attach their own state) */
 	struct queue_t *queue_req;	/* Request queue */
 	struct queue_t *queue_resp;	/* Response queue */
 	struct pdp_t pdpa[PDP_MAX];	/* PDP storage */
 	struct pdp_t *hashtid[PDP_MAX];	/* Hash table for IMSI + NSAPI */
 	struct osmo_timer_list queue_timer; /* internal queue_{req,resp} timer */
 	/* Call back functions */
 	int (*cb_delete_context) (struct pdp_t *);
 	int (*cb_create_context_ind) (struct pdp_t *);
 	int (*cb_update_context_ind)(struct pdp_t *pdp);
 	int (*cb_unsup_ind) (struct sockaddr_in * peer);
 	int (*cb_extheader_ind) (struct sockaddr_in * peer);
 	int (*cb_ran_info_relay_ind) (struct sockaddr_in *peer, union gtpie_member **ie);
 	int (*cb_conf) (int type, int cause, struct pdp_t * pdp, void *cbp);
 	int (*cb_data_ind) (struct pdp_t * pdp, void *pack, unsigned len);
 	int (*cb_recovery) (struct sockaddr_in * peer, uint8_t recovery);
 	int (*cb_recovery2) (struct sockaddr_in * peer, struct pdp_t * pdp, uint8_t recovery);
 	int (*cb_recovery3) (struct gsn_t *gsn, struct sockaddr_in *peer, struct pdp_t *pdp, uint8_t recovery);
 	/* Counters */
 	struct rate_ctr_group *ctrg;
 	/* Timers: */
 	struct osmo_tdef *tdef;
 };
 /* External API functions */
 extern int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 		   int mode);
 extern int gtp_free(struct gsn_t *gsn);
 extern int gtp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp,
 		      uint64_t imsi, uint8_t nsapi) OSMO_DEPRECATED("Use gtp_pdp_newpdp() instead");
 extern int gtp_freepdp(struct gsn_t *gsn, struct pdp_t *pdp);
 extern int gtp_freepdp_teardown(struct gsn_t *gsn, struct pdp_t *pdp);
 extern int gtp_create_context_req(struct gsn_t *gsn, struct pdp_t *pdp,
 				  void *cbp);
 extern int gtp_set_cb_create_context_ind(struct gsn_t *gsn,
 					 int (*cb_create_context_ind) (struct
 								       pdp_t *
 								       pdp));
 extern int gtp_set_cb_update_context_ind(struct gsn_t *gsn,
 					 int (*cb_update_context_ind)(struct pdp_t *pdp));
 extern int gtp_set_cb_data_ind(struct gsn_t *gsn,
 			       int (*cb_data_ind) (struct pdp_t * pdp,
 						   void *pack, unsigned len));
 extern int gtp_set_cb_delete_context(struct gsn_t *gsn,
 				     int (*cb_delete_context) (struct pdp_t *
 							       pdp));
 /*extern int gtp_set_cb_create_context(struct gsn_t *gsn,
  int (*cb_create_context) (struct pdp_t* pdp)); */
 extern int gtp_set_cb_unsup_ind(struct gsn_t *gsn,
 				int (*cb) (struct sockaddr_in * peer));
 extern int gtp_set_cb_extheader_ind(struct gsn_t *gsn,
 				    int (*cb) (struct sockaddr_in * peer));
 extern int gtp_set_cb_ran_info_relay_ind(struct gsn_t *gsn,
 				    int (*cb) (struct sockaddr_in * peer, union gtpie_member **ie));
 extern int gtp_set_cb_conf(struct gsn_t *gsn,
 			   int (*cb) (int type, int cause, struct pdp_t * pdp,
 				      void *cbp));
 int gtp_set_cb_recovery(struct gsn_t *gsn,
 			int (*cb) (struct sockaddr_in * peer,
 				   uint8_t recovery))
 	OSMO_DEPRECATED("Use gtp_set_cb_recovery2() instead, to obtain pdp ctx originating the recovery");
 int gtp_set_cb_recovery2(struct gsn_t *gsn,
 			int (*cb) (struct sockaddr_in * peer,
 				   struct pdp_t * pdp,
 				   uint8_t recovery))
 	OSMO_DEPRECATED("Use gtp_set_cb_recovery3() instead, to obtain gsn handling the recovery");
 int gtp_set_cb_recovery3(struct gsn_t *gsn,
 			int (*cb) (struct gsn_t * gsn, struct sockaddr_in * peer,
 				   struct pdp_t * pdp,
 				   uint8_t recovery));
 void gtp_clear_queues(struct gsn_t *gsn);
 extern int gtp_fd(struct gsn_t *gsn);
 extern int gtp_retrans(struct gsn_t *gsn) OSMO_DEPRECATED("This API is a no-op, libgtp already does the job internally");
 extern int gtp_retranstimeout(struct gsn_t *gsn, struct timeval *timeout) OSMO_DEPRECATED("This API is a no-op and will return a 1 day timeout");
 #endif /* !_GSN_H */
--- a/include/osmocom/gtp/gtp.h
+++ b/include/osmocom/gtp/gtp.h
@@ -1,19 +1,22 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
- * 
+ *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 #ifndef _GTP_H
 #define _GTP_H
-#define GTP_MODE_GGSN 1
+#include <osmocom/core/utils.h>
-#define GTP_MODE_SGSN 2
+
 #include "gtpie.h"
 #include "pdp.h"
 #include "gsn.h"
 #define GTP0_PORT	3386
 #define GTP1C_PORT	2123
@@ -25,12 +28,10 @@
 #define GTP1_HEADER_SIZE_SHORT  8
 #define GTP1_HEADER_SIZE_LONG  12
 #define NAMESIZE 1024
 #define SYSLOG_PRINTSIZE 255
 #define ERRMSG_SIZE 255
 #define RESTART_FILE "gsn_restart"
 #define NAMESIZE 1024
 /* GTP version 1 extension header type definitions. */
 #define GTP_EXT_PDCP_PDU    0xC0	/* PDCP PDU Number */
@@ -52,7 +53,7 @@
 #define GTP_UPDATE_PDP_RSP   19	/* Update PDP Context Response */
 #define GTP_DELETE_PDP_REQ   20	/* Delete PDP Context Request */
 #define GTP_DELETE_PDP_RSP   21	/* Delete PDP Context Response */
-						       /* 22-25 For future use. *//* In version GTP 1 anonomous PDP context */
+/* 22-25 For future use. *//* In version GTP 1 anonomous PDP context */
 #define GTP_ERROR            26	/* Error Indication */
 #define GTP_PDU_NOT_REQ      27	/* PDU Notification Request */
 #define GTP_PDU_NOT_RSP      28	/* PDU Notification Response */
@@ -79,13 +80,18 @@
 #define GTP_FWD_SRNS         58	/* Forward SRNS Context */
 #define GTP_FWD_RELOC_ACK    59	/* Forward Relocation Complete Acknowledge */
 #define GTP_FWD_SRNS_ACK     60	/* Forward SRNS Context Acknowledge */
 #define GTP_RAN_INFO_RELAY   70	/* RAN Information Relay */
 /* 61-239 For future use. */
 #define GTP_DATA_TRAN_REQ   240	/* Data Record Transfer Request */
 #define GTP_DATA_TRAN_RSP   241	/* Data Record Transfer Response */
 /* 242-254 For future use. */
 #define GTP_GPDU            255	/* G-PDU */
-/* GTP information element cause codes from 29.060 v3.9.0 7.7 */
+extern const struct value_string gtp_type_names[];
 static inline const char *gtp_type_name(uint8_t val)
 { return get_value_string(gtp_type_names, val); }
 /* GTP information element cause codes from 29.060 v15.3.0 7.7.1 */
 /*                                                            */
 #define GTPCAUSE_REQ_IMSI                   0	/* Request IMSI */
 #define GTPCAUSE_REQ_IMEI                   1	/* Request IMEI */
@@ -93,19 +99,26 @@
 #define GTPCAUSE_NO_ID_NEEDED               3	/* No identity needed */
 #define GTPCAUSE_MS_REFUSES_X               4	/* MS refuses */
 #define GTPCAUSE_MS_NOT_RESP_X              5	/* MS is not GPRS responding */
-#define GTPCAUSE_006                        6	/* For future use 6-48 */
+#define GTPCAUSE_REACTIVATION_REQ           6	/* Reactivation Requested */
-#define GTPCAUSE_049                       49	/* Cause values reserved for GPRS charging protocol use (See GTP' in GSM 12.15) 49-63 */
+#define GTPCAUSE_PDP_ADDR_INACT             7	/* PDP address inactivity timer expires */
-#define GTPCAUSE_064                       64	/* For future use 64-127 */
+#define GTPCAUSE_NET_FAILURE                8	/* Network failure */
 #define GTPCAUSE_QOS_MISMATCH               9	/* QoS parameter mismatch */
 /* 10-48 For future use */
 /* 49-63 Cause values reserved for GPRS charging protocol use (See GTP' 3GPP TS 32.295) */
 /* 64-127 For future use */
 #define GTPCAUSE_ACC_REQ                  128	/* Request accepted */
-#define GTPCAUSE_129                      129	/* For future use 129-176 */
+#define GTPCAUSE_NEW_PDP_NET_PREF         129	/* New PDP type due to network preference */
-#define GTPCAUSE_177                      177	/* Cause values reserved for GPRS charging protocol use (See GTP' In GSM 12.15) 177-191 */
+#define GTPCAUSE_NEW_PDP_ADDR_BEAR        130	/* New PDP type due to single address bearer only */
 /* 131-176 For future use */
 /* 177-191 Cause values reserved for GPRS charging protocol use (See GTP' 3GPP TS 32.295) */
 #define GTPCAUSE_NON_EXIST                192	/* Non-existent */
 #define GTPCAUSE_INVALID_MESSAGE          193	/* Invalid message format */
 #define GTPCAUSE_IMSI_NOT_KNOWN           194	/* IMSI not known */
 #define GTPCAUSE_MS_DETACHED              195	/* MS is GPRS detached */
 #define GTPCAUSE_MS_NOT_RESP              196	/* MS is not GPRS responding */
 #define GTPCAUSE_MS_REFUSES               197	/* MS refuses */
-#define GTPCAUSE_198                      198	/* For future use */
+#define GTPCAUSE_VERSION_NOT_SUPPORTED    198	/* Version not supported */
 #define GTPCAUSE_NO_RESOURCES             199	/* No resources available */
 #define GTPCAUSE_NOT_SUPPORTED            200	/* Service not supported */
 #define GTPCAUSE_MAN_IE_INCORRECT         201	/* Mandatory IE incorrect */
@@ -128,13 +141,21 @@
 #define GTPCAUSE_SYN_ERR_FILTER           218	/* Syntactic errors in packet filter(s) */
 #define GTPCAUSE_MISSING_APN              219	/* Missing or unknown APN */
 #define GTPCAUSE_UNKNOWN_PDP              220	/* Unknown PDP address or PDP type */
-#define GTPCAUSE_221                      221	/* For Future Use 221-240 */
+/* 234-240 For future use */
-#define GTPCAUSE_241                      241	/* Cause Values Reserved For Gprs Charging Protocol Use (See Gtp' In Gsm 12.15) 241-255 */
+/* 241-255 Cause Values Reserved For Gprs Charging Protocol Use (See Gtp' 3GPP TS 32.295) */
 static inline bool gtp_cause_successful(uint8_t cause)
 {
 	return cause == GTPCAUSE_ACC_REQ ||
 		cause == GTPCAUSE_NEW_PDP_NET_PREF ||
 		cause == GTPCAUSE_NEW_PDP_ADDR_BEAR;
 }
 struct ul66_t;
 struct ul16_t;
 struct pdp_t;
-/* GTP 0 header. 
+/* GTP 0 header.
 * Explanation to some of the fields:
 * SNDCP NPDU Number flag = 0 except for inter SGSN handover situations
 * SNDCP N-PDU LCC Number 0 = 0xff except for inter SGSN handover situations
@@ -161,6 +182,13 @@ struct gtp0_header {		/*    Descriptions from 3GPP 09.60 */
 	uint64_t tid;		/* 13 Tunnel ID */
 } __attribute__((packed));	/* 20 */
 #define GTP1HDR_F_NPDU	0x01
 #define GTP1HDR_F_SEQ	0x02
 #define GTP1HDR_F_EXT	0x04
 #define GTP1HDR_F_GTP1	0x10
 #define GTPHDR_F_VER(n)	((n) << 5)
 #define GTPHDR_F_GET_VER(flags) ((flags)>>5)
 struct gtp1_header_short {	/*    Descriptions from 3GPP 29060 */
 	uint8_t flags;		/* 01 bitfield, with typical values */
 	/*    001..... Version: 1 */
@@ -212,192 +240,48 @@ union gtp_packet {
 	struct gtp1_packet_long gtp1l;
 } __attribute__ ((packed));
 /* ***********************************************************
 * Information storage for each gsn instance
 *
 * Normally each instance of the application corresponds to
 * one instance of a gsn. 
 * 
 * In order to avoid global variables in the application, and
 * also in order to allow several instances of a gsn in the same
 * application this struct is provided in order to store all
 * relevant information related to the gsn.
 * 
 * Note that this does not include information storage for '
 * each pdp context. This is stored in another struct.
 *************************************************************/
 struct gsn_t {
 	/* Parameters related to the network interface */
 	int fd0;		/* GTP0 file descriptor */
 	int fd1c;		/* GTP1 control plane file descriptor */
 	int fd1u;		/* GTP0 user plane file descriptor */
 	int mode;		/* Mode of operation: GGSN or SGSN */
 	struct in_addr gsnc;	/* IP address of this gsn for signalling */
 	struct in_addr gsnu;	/* IP address of this gsn for user traffic */
 	/* Parameters related to signalling messages */
 	uint16_t seq_next;	/* Next sequence number to use */
 	int seq_first;		/* First packet in queue (oldest timeout) */
 	int seq_last;		/* Last packet in queue (youngest timeout) */
 	unsigned char restart_counter;	/* Increment on restart. Stored on disk */
 	char *statedir;		/* Disk location for permanent storage */
 	struct queue_t *queue_req;	/* Request queue */
 	struct queue_t *queue_resp;	/* Response queue */
 	/* Call back functions */
 	int (*cb_delete_context) (struct pdp_t *);
 	int (*cb_create_context_ind) (struct pdp_t *);
 	int (*cb_unsup_ind) (struct sockaddr_in * peer);
 	int (*cb_extheader_ind) (struct sockaddr_in * peer);
 	int (*cb_conf) (int type, int cause, struct pdp_t * pdp, void *cbp);
 	int (*cb_data_ind) (struct pdp_t * pdp, void *pack, unsigned len);
 	int (*cb_recovery) (struct sockaddr_in * peer, uint8_t recovery);
 	/* Counters */
 	uint64_t err_socket;	/* Number of socket errors */
 	uint64_t err_readfrom;	/* Number of readfrom errors */
 	uint64_t err_sendto;	/* Number of sendto errors */
 	uint64_t err_memcpy;	/* Number of memcpy */
 	uint64_t err_queuefull;	/* Number of times queue was full */
 	uint64_t err_seq;	/* Number of seq out of range */
 	uint64_t err_address;	/* GSN address conversion failed */
 	uint64_t err_unknownpdp;	/* GSN address conversion failed */
 	uint64_t err_unknowntid;	/* Application supplied unknown imsi+nsapi */
 	uint64_t err_cause;	/* Unexpected cause value received */
 	uint64_t err_outofpdp;	/* Out of storage for PDP contexts */
 	uint64_t empty;		/* Number of empty packets */
 	uint64_t unsup;		/* Number of unsupported version 29.60 11.1.1 */
 	uint64_t tooshort;	/* Number of too short headers 29.60 11.1.2 */
 	uint64_t unknown;	/* Number of unknown messages 29.60 11.1.3 */
 	uint64_t unexpect;	/* Number of unexpected messages 29.60 11.1.4 */
 	uint64_t duplicate;	/* Number of duplicate or unsolicited replies */
 	uint64_t missing;	/* Number of missing information field messages */
 	uint64_t incorrect;	/* Number of incorrect information field messages */
 	uint64_t invalid;	/* Number of invalid message format messages */
 };
 /* External API functions */
 extern const char *gtp_version();
 extern int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 		   int mode);
 extern int gtp_free(struct gsn_t *gsn);
 extern int gtp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp,
 		      uint64_t imsi, uint8_t nsapi);
 extern int gtp_freepdp(struct gsn_t *gsn, struct pdp_t *pdp);
 extern int gtp_create_context_req(struct gsn_t *gsn, struct pdp_t *pdp,
 				  void *cbp);
 extern int gtp_set_cb_create_context_ind(struct gsn_t *gsn,
 					 int (*cb_create_context_ind) (struct
 								       pdp_t *
 								       pdp));
 extern int gtp_create_context_resp(struct gsn_t *gsn, struct pdp_t *pdp,
 				   int cause);
 extern int gtp_update_context(struct gsn_t *gsn, struct pdp_t *pdp,
 			      void *cbp, struct in_addr *inetaddr);
 extern int gtp_update_context_resp(struct gsn_t *gsn, struct pdp_t *pdp,
 				   int cause);
 extern int gtp_delete_context_req(struct gsn_t *gsn, struct pdp_t *pdp,
-				  void *cbp, int teardown);
+				  void *cbp, int teardown)
 		OSMO_DEPRECATED("Use gtp_delete_context_req2() instead, to avoid freeing pdp ctx before reply");
 extern int gtp_delete_context_req2(struct gsn_t *gsn, struct pdp_t *pdp,
 				   void *cbp, int teardown);
 extern int gtp_data_req(struct gsn_t *gsn, struct pdp_t *pdp,
 			void *pack, unsigned len);
-extern int gtp_set_cb_data_ind(struct gsn_t *gsn,
+extern int gtp_ran_info_relay_req(struct gsn_t *gsn, const struct sockaddr_in *peer,
-			       int (*cb_data_ind) (struct pdp_t * pdp,
+				  const uint8_t *ran_container, size_t ran_container_len,
-						   void *pack, unsigned len));
+				  const uint8_t *rim_route_addr, size_t rim_route_addr_len,
 				  uint8_t rim_route_addr_discr);
 extern int gtp_fd(struct gsn_t *gsn);
 extern int gtp_decaps0(struct gsn_t *gsn);
 extern int gtp_decaps1c(struct gsn_t *gsn);
 extern int gtp_decaps1u(struct gsn_t *gsn);
 extern int gtp_retrans(struct gsn_t *gsn);
 extern int gtp_retranstimeout(struct gsn_t *gsn, struct timeval *timeout);
 extern int gtp_set_cb_delete_context(struct gsn_t *gsn,
 				     int (*cb_delete_context) (struct pdp_t *
 							       pdp));
 /*extern int gtp_set_cb_create_context(struct gsn_t *gsn,
  int (*cb_create_context) (struct pdp_t* pdp)); */
 extern int gtp_set_cb_unsup_ind(struct gsn_t *gsn,
 				int (*cb) (struct sockaddr_in * peer));
 extern int gtp_set_cb_extheader_ind(struct gsn_t *gsn,
 				    int (*cb) (struct sockaddr_in * peer));
 extern int gtp_set_cb_conf(struct gsn_t *gsn,
 			   int (*cb) (int type, int cause, struct pdp_t * pdp,
 				      void *cbp));
 int gtp_set_cb_recovery(struct gsn_t *gsn,
 			int (*cb) (struct sockaddr_in * peer,
 				   uint8_t recovery));
 /* Internal functions (not part of the API */
 extern int gtp_echo_req(struct gsn_t *gsn, int version, void *cbp,
 			struct in_addr *inetaddrs);
 extern int gtp_echo_resp(struct gsn_t *gsn, int version,
 			 struct sockaddr_in *peer, int fd,
 			 void *pack, unsigned len);
 extern int gtp_echo_ind(struct gsn_t *gsn, int version,
 			struct sockaddr_in *peer, int fd,
 			void *pack, unsigned len);
 extern int gtp_echo_conf(struct gsn_t *gsn, int version,
 			 struct sockaddr_in *peer, void *pack, unsigned len);
 extern int gtp_unsup_req(struct gsn_t *gsn, int version,
 			 struct sockaddr_in *peer,
 			 int fd, void *pack, unsigned len);
 extern int gtp_unsup_ind(struct gsn_t *gsn, struct sockaddr_in *peer,
 			 void *pack, unsigned len);
 extern int gtp_create_pdp_resp(struct gsn_t *gsn, int version,
 			       struct pdp_t *pdp, uint8_t cause);
 extern int gtp_create_pdp_ind(struct gsn_t *gsn, int version,
 			      struct sockaddr_in *peer, int fd,
 			      void *pack, unsigned len);
 extern int gtp_create_pdp_conf(struct gsn_t *gsn, int version,
 			       struct sockaddr_in *peer,
 			       void *pack, unsigned len);
 extern int gtp_update_pdp_req(struct gsn_t *gsn, int version, void *cbp,
 			      struct in_addr *inetaddr, struct pdp_t *pdp);
 extern int gtp_delete_pdp_req(struct gsn_t *gsn, int version, void *cbp,
 			      struct pdp_t *pdp);
 extern int gtp_delete_pdp_resp(struct gsn_t *gsn, int version,
 			       struct sockaddr_in *peer, int fd,
 			       void *pack, unsigned len,
 			       struct pdp_t *pdp, struct pdp_t *linked_pdp,
 			       uint8_t cause, int teardown);
 extern int gtp_delete_pdp_ind(struct gsn_t *gsn, int version,
 			      struct sockaddr_in *peer, int fd,
 			      void *pack, unsigned len);
 extern int gtp_delete_pdp_conf(struct gsn_t *gsn, int version,
 			       struct sockaddr_in *peer,
 			       void *pack, unsigned len);
 extern int ipv42eua(struct ul66_t *eua, struct in_addr *src);
 extern int eua2ipv4(struct in_addr *dst, struct ul66_t *eua);
 extern int gsna2in_addr(struct in_addr *dst, struct ul16_t *gsna);
-extern int in_addr2gsna(struct ul16_t *gsna, struct in_addr *src);
+
 extern const char *imsi_gtp2str(const uint64_t *imsi);
 /*! Set the talloc context for internal objects */
 void gtp_set_talloc_ctx(void *ctx);
 #endif /* !_GTP_H */
--- a/include/osmocom/gtp/gtpie.h
+++ b/include/osmocom/gtp/gtpie.h
@@ -1,5 +1,5 @@
 /* 
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003, 2004 Mondru AB.
 * 
 *  The contents of this file may be used under the terms of the GNU
@@ -12,6 +12,8 @@
 #ifndef _GTPIE_H
 #define _GTPIE_H
 #include <arpa/inet.h>
 /* Macroes for conversion between host and network byte order */
 #define hton8(x)  (x)
 #define ntoh8(x)  (x)
@@ -48,7 +50,7 @@ static __inline uint64_t hton64(uint64_t q)
 #define GTPIE_DEBUG 0		/* Print debug information */
-/* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
+/* GTP Information elements from 29.060 v11.8.0 7.7 Information Elements */
 /* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
 * by 135: QOS Profile in version 1 */
@@ -84,7 +86,7 @@ static __inline uint64_t hton64(uint64_t q)
 #define GTPIE_TRACE_TYPE     28	/* Trace Type 2 */
 #define GTPIE_MS_NOT_REACH   29	/* MS Not Reachable Reason 1 */
 				/* 30-116 UNUSED */
-/* 117-126 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+/* 117-126 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15 / 32.295) */
 #define GTPIE_CHARGING_ID   127	/* Charging ID 4 */
 #define GTPIE_EUA           128	/* End User Address */
 #define GTPIE_MM_CONTEXT    129	/* MM Context */
@@ -102,13 +104,81 @@ static __inline uint64_t hton64(uint64_t q)
 #define GTPIE_EXT_HEADER_T  141	/* Extension Header Type List */
 #define GTPIE_TRIGGER_ID    142	/* Trigger Id */
 #define GTPIE_OMC_ID        143	/* OMC Identity */
 #define GTPIE_RAN_T_CONTAIN 144	/* RAN Transparent Container */
 #define GTPIE_PDP_CTX_PRIO  145	/* PDP Context Prioritization */
 #define GTPIE_ADDL_RAB_S_I  146	/* Additional RAB Setup Information */
 #define GTPIE_SGSN_NUMBER   147	/* SGSN Number */
 #define GTPIE_COMMON_FLAGS  148	/* Common Flags */
 #define GTPIE_APN_RESTR     149	/* APN Restriction */
 #define GTPIE_R_PRIO_LCS    150	/* Radio Priority LCS */
 #define GTPIE_RAT_TYPE      151	/* Radio Access Technology Type */
 #define GTPIE_USER_LOC      152	/* User Location Information  */
 #define GTPIE_MS_TZ         153	/* MS Time Zone */
 #define GTPIE_IMEI_SV       154	/* IMEI Software Version */
-/* 239-250 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+#define GTPIE_CML_CHG_I_CT  155	/* CAMEL Charging Information Container */
 #define GTPIE_MBMS_UE_CTX   156	/* MSMS UE Context */
 #define GTPIE_TMGI          157	/* Temporary Mobile Group Identity (TMGI) */
 #define GTPIE_RIM_ROUT_ADDR 158	/* RIM Routing Address */
 #define GTPIE_MBMS_PCO      159	/* MBMS Protocol Configuratin Options */
 #define GTPIE_MBMS_SA       160	/* MBMS Service Area */
 #define GTPIE_SRNC_PDCP_CTX 161	/* Source RNC PDCP Context Info */
 #define GTPIE_ADDL_TRACE    162	/* Additional Trace Info */
 #define GTPIE_HOP_CTR       163	/* Hop Counter */
 #define GTPIE_SEL_PLMN_ID   164	/* Selected PLMN ID */
 #define GTPIE_MBMS_SESS_ID  165	/* MBMS Session Identifier */
 #define GTPIE_MBMS_2_3G_IND 166	/* MBMS 2G/3G Indicator */
 #define GTPIE_ENH_NSAPI     167	/* Enhanced NSAPI */
 #define GTPIE_MBMS_SESS_DUR 168	/* MBMS Session Duration */
 #define GTPIE_A_MBMS_TRAC_I 169	/* Additional MBMS Trace Info */
 #define GTPIE_MBMS_S_REP_N  170	/* MBMS Session Repetition Number */
 #define GTPIE_MBMS_TTDT     171	/* MBMS Time To Data Transfer */
 #define GTPIE_PS_HO_REQ_CTX 172	/* PS Handover Request Context */
 #define GTPIE_BSS_CONTAINER 173	/* BSS Container */
 #define GTPIE_CELL_ID       174	/* Cell Identification */
 #define GTPIE_PDU_NUMBERS   175	/* PDU Numbers */
 #define GTPIE_BSSGP_CAUSE   176	/* BSSGP Cause */
 #define GTPIE_RQD_MBMS_BCAP 177	/* Required MBMS Bearer Capabilities */
 #define GTPIE_RIM_RA_DISCR  178	/* RIM Routing Address Discriminator */
 #define GTPIE_L_SETUP_PFCS  179	/* List of set-up PFCs */
 #define GTPIE_PS_HO_XID_PAR 180	/* PS Handover XID Parameters */
 #define GTPIE_MS_CHG_REP_A  181	/* MS Info Change Reporting Action */
 #define GTPIE_DIR_TUN_FLAGS 182	/* Direct Tunnel Flags */
 #define GTPIE_CORREL_ID     183	/* Correlation-ID */
 #define GTPIE_BCM           184	/* Bearer control mode */
 #define GTPIE_MBMS_FLOWI    185	/* MBMS Flow Identifier */
 #define GTPIE_MBMS_MC_DIST  186	/* MBMS IP Multicast Distribution */
 #define GTPIE_MBMS_DIST_ACK 187	/* MBMS Distribution Acknowledgement */
 #define GTPIE_R_IRAT_HO_INF 188	/* Reliable INTER RAT HANDOVER INFO */
 #define GTPIE_RFSP_IDX      189	/* RFSP Index */
 #define GTPIE_FQDN          190	/* FQDN */
 #define GTPIE_E_ALL_PRIO_1  191	/* Evolvd Allocation/Retention Priority I */
 #define GTPIE_E_ALL_PRIO_2  192	/* Evolvd Allocation/Retention Priority II */
 #define GTPIE_E_CMN_FLAGS   193	/* Extended Common Flags */
 #define GTPIE_U_CSG_INFO    194	/* User CSG Information (UCI) */
 #define GTPIE_CSG_I_REP_ACT 195	/* CSG Information Reporting Action */
 #define GTPIE_CSG_ID        196	/* CSG ID */
 #define GTPIE_CSG_MEMB_IND  197	/* CSG Membership Indication (CMI) */
 #define GTPIE_AMBR          198	/* Aggregate Maximum Bit Rate (AMBR) */
 #define GTPIE_UE_NET_CAPA   199	/* UE Network Capability */
 #define GTPIE_UE_AMBR       200	/* UE-AMBR */
 #define GTPIE_APN_AMBR_NS   201	/* APN-AMBR with NSAPI */
 #define GTPIE_GGSN_BACKOFF  202	/* GGSN Back-Off Time */
 #define GTPIE_S_PRIO_IND    203	/* Signalling Priority Indication */
 #define GTPIE_S_PRIO_IND_NS 204	/* Signalling Priority Indication with NSAPI */
 #define GTPIE_H_BR_16MBPS_F 205	/* Higher Bitrates than 16 Mbps flag */
 /* 206: Reserved */
 #define GTPIE_A_MMCTX_SRVCC 207	/* Additional MM context for SRVCC */
 #define GTPIE_A_FLAGS_SRVCC 208	/* Additional flags fro SRVC */
 #define GTPIE_STN_SR        209	/* STN-SR */
 #define GTPIE_C_MSISDN      210	/* C-MSISDN */
 #define GTPIE_E_RANAP_CAUSE 211	/* Extended RANAP Cause */
 #define GTPIE_ENODEB_ID     212	/* eNodeB ID */
 #define GTPIE_SEL_MODE_NS   213	/* Selection Mode with NSAPI */
 #define GTPIE_ULI_TIMESTAMP 214	/* ULI Timestamp */
 /* 215-238 Spare. For future use */
 /* 239-250 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15 / 32.295) */
 #define GTPIE_CHARGING_ADDR 251	/* Charging Gateway Address */
-/* 252-254 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+/* 252-254 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15 / 32.295) */
 #define GTPIE_PRIVATE       255	/* Private Extension */
 /* GTP information element structs in network order */
@@ -220,9 +290,9 @@ struct tlv2 {
 } __attribute__ ((packed));
 extern int gtpie_tlv(void *p, unsigned int *length, unsigned int size,
-		     uint8_t t, int l, void *v);
+		     uint8_t t, int l, const void *v);
 extern int gtpie_tv0(void *p, unsigned int *length, unsigned int size,
-		     uint8_t t, int l, uint8_t * v);
+		     uint8_t t, int l, const uint8_t * v);
 extern int gtpie_tv1(void *p, unsigned int *length, unsigned int size,
 		     uint8_t t, uint8_t v);
 extern int gtpie_tv2(void *p, unsigned int *length, unsigned int size,
@@ -247,9 +317,11 @@ extern int gtpie_gettv8(union gtpie_member *ie[], int type, int instance,
 			uint64_t * dst);
 extern int gtpie_decaps(union gtpie_member *ie[], int version,
-			void *pack, unsigned len);
+			const void *pack, unsigned len);
 extern int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len);
 extern int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
 			 void *pack, unsigned *len);
 extern int gtpie_encaps3(union gtpie_member *ie[], unsigned int ie_len,
 		  void *pack, unsigned pack_len, unsigned *encoded_len);
 #endif /* !_GTPIE_H */
--- a/include/osmocom/gtp/pdp.h
+++ b/include/osmocom/gtp/pdp.h
@@ -1,20 +1,37 @@
-/* 
+/*
- *  OpenGGSN - Gateway GPRS Support Node
+ *  OsmoGGSN - Gateway GPRS Support Node
 *  Copyright (C) 2002, 2003 Mondru AB.
- * 
+ *  Copyright (C) 2017 Harald Welte <laforge@gnumonks.org>
 *
 *  The contents of this file may be used under the terms of the GNU
 *  General Public License Version 2, provided that the above copyright
 *  notice and this permission notice is included in all copies or
 *  substantial portions of the software.
- * 
+ *
 */
 #ifndef _PDP_H
 #define _PDP_H
 #include <stdbool.h>
 #include <netinet/in.h>
 #include <osmocom/core/defs.h>
 #include <osmocom/core/linuxlist.h>
 struct gsn_t;
 #define LOGPDPX(ss, level, pdp, fmt, args...)				\
 	LOGP(ss, level, "PDP(%s:%u): " fmt, imsi_gtp2str(&(pdp)->imsi), (pdp)->nsapi, ## args)
 #define PDP_MAX 1024		/* Max number of PDP contexts */
 #define PDP_MAXNSAPI 16		/* Max number of NSAPI */
 #define PDP_EUA_ORG_IETF	0xF1
 #define PDP_EUA_TYPE_v4		0x21
 #define PDP_EUA_TYPE_v6		0x57
 #define PDP_EUA_TYPE_v4v6	0x8D
 /* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
 /* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
 * by 135: QOS Profile in version 1 */
@@ -29,6 +46,11 @@ struct ul_t {
 	unsigned char *v;
 };
 struct ul1_t {
 	unsigned int l;
 	unsigned char v[1];
 };
 struct ul16_t {
 	unsigned int l;
 	unsigned char v[16];
@@ -59,16 +81,16 @@ struct ul255_t {
 * and 09.60.
 * 31 * 4 + 15 structs +  = 120 + 15 structs ~ 2k / context
 * Structs: IP address 16+4 bytes (6), APN 255 bytes (2)
- * QOS: 255 bytes (3), msisdn 16 bytes (1), 
+ * QOS: 255 bytes (3), msisdn 16 bytes (1),
 *
 * TODO: We need to consider who manages the pdp_t hash tables
 * Is it gtp_lib, or is it the application?
- * I suppose that it will be gtp_lib. 
+ * I suppose that it will be gtp_lib.
 * SGSN will ask gtplib for new pdp_t. Fill out the fields,
 * and pass it on to gtp_create_pdp_req.
 * GGSN will receive gtp_create_pdp_ind, create new pdp_t and
 * send responce to SGSN.
- * SGSN will receive response and gtplib will find the 
+ * SGSN will receive response and gtplib will find the
 * original pdp_t corresponding to the request. This will be
 * passed on to the application.
 * Eventually the SGSN will close the connection, and the
@@ -76,10 +98,10 @@ struct ul255_t {
 * This means that gtplib need to have functions to
 * allocate, free, sort and find pdp_t
 * (newpdp, freepdp, getpdp)
- * Hash tables: TID, IMSI, IP etc.) 
+ * Hash tables: TID, IMSI, IP etc.)
 *
 *
- * Secondary PDP Context Activation Procedure 
+ * Secondary PDP Context Activation Procedure
 *
 * With GTP version 1 it is possible to establish multiple PDP
 * contexts with the same IP address. With this scheme the first
@@ -109,7 +131,7 @@ struct pdp_t {
 	/* Parameters shared by all PDP context belonging to the same MS */
 	void *ipif;		/* IP network interface */
-	void *peer;		/* Pointer to peer protocol */
+	void *peer[2];		/* Pointer to peer protocol */
 	void *asap;		/* Application specific service access point */
 	uint64_t imsi;		/* International Mobile Subscriber Identity. */
@@ -221,37 +243,45 @@ struct pdp_t {
 	/* to be used by libgtp callers/users (to attach their own private state) */
 	void *priv;
 	struct gsn_t *gsn; /* Back pointer to GSN where this pdp ctx belongs to */
 	bool tx_gpdu_seq;		/* Transmit (true) or suppress G-PDU sequence numbers */
 	struct llist_head qmsg_list_req; /* list of req qmsg_t in retrans queue belonging this pdp ctx */
 	struct ul1_t dir_tun_flags; /* Direct Tunnel Flags, TS 29.060 7.7.81 */
 };
 /* functions related to pdp_t management */
-int pdp_init();
+int gtp_pdp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t imsi,
-int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
+		   uint8_t nsapi, struct pdp_t *pdp_old);
 	       struct pdp_t *pdp_old);
 int pdp_freepdp(struct pdp_t *pdp);
-int pdp_getpdp(struct pdp_t **pdp);
+int gtp_pdp_getgtp0(struct gsn_t *gsn, struct pdp_t **pdp, uint16_t fl);
-
+int gtp_pdp_getgtp1(struct gsn_t *gsn, struct pdp_t **pdp, uint32_t tei);
-int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl);
+int gtp_pdp_getgtp1_peer_d(struct gsn_t *gsn, struct pdp_t **pdp, const struct sockaddr_in *peer, uint32_t teid_gn);
-int pdp_getgtp1(struct pdp_t **pdp, uint32_t tei);
+int gtp_pdp_getimsi(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi);
-
+int gtp_pdp_tidget(struct gsn_t *gsn, struct pdp_t **pdp, uint64_t tid);
 int pdp_getimsi(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi);
 int pdp_tidhash(uint64_t tid);
 int pdp_tidset(struct pdp_t *pdp, uint64_t tid);
 int pdp_tiddel(struct pdp_t *pdp);
 int pdp_tidget(struct pdp_t **pdp, uint64_t tid);
 uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi);
 void pdp_set_imsi_nsapi(struct pdp_t *pdp, uint64_t teid);
-/*
+unsigned int pdp_count_secondary(const struct pdp_t *pdp);
-int pdp_iphash(void* ipif, struct ul66_t *eua);
+
-int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua);
+/* Deprecated APIs (support for only 1 GSN per process). Must be used only after first call to gtp_new() and until it is freed. */
-int pdp_ipdel(struct pdp_t *pdp);
+int pdp_init(struct gsn_t *gsn); /* Use only allowed inside libgtp to keep compatiblity with deprecated APIs defined here. */
-int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua);
+int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
-*/
+	       struct pdp_t *pdp_old) OSMO_DEPRECATED("Use gtp_pdp_newpdp() instead");
 int pdp_getpdp(struct pdp_t **pdp) OSMO_DEPRECATED("Use gsn_t->pdpa field instead");
 int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl) OSMO_DEPRECATED("Use gtp_pdp_getgtp0() instead");
 int pdp_getgtp1(struct pdp_t **pdp, uint32_t tei) OSMO_DEPRECATED("Use gtp_pdp_getgtp1() instead");
 int pdp_getgtp1_peer_d(struct pdp_t **pdp, const struct sockaddr_in *peer, uint32_t teid_gn) OSMO_DEPRECATED("Use gtp_pdp_getgtp1_peer_d() instead");
 int pdp_getimsi(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi) OSMO_DEPRECATED("Use gtp_pdp_getimsi() instead");
 int pdp_tidget(struct pdp_t **pdp, uint64_t tid) OSMO_DEPRECATED("Use gtp_pdp_tidget() instead");
 int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua);
 int pdp_euaton(struct ul66_t *eua, struct in_addr *dst);
 uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi);
 int ulcpy(void *dst, void *src, size_t size);
 #endif /* !_PDP_H */
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1,7 +1,44 @@
 noinst_LIBRARIES = libmisc.a
-noinst_HEADERS = gnugetopt.h ippool.h lookup.h syserr.h tun.h
+noinst_HEADERS = \
 		 checksum.h \
 		 gnugetopt.h \
 		 gtp-kernel.h \
 		 icmpv6.h \
 		 in46_addr.h \
 		 ippool.h \
 		 lookup.h \
 		 netdev.h \
 		 netns.h \
 		 syserr.h \
 		 tun.h \
 		 util.h \
 		 $(NULL)
-AM_CFLAGS = -O2 -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+AM_CFLAGS = \
 	    -fno-builtin \
 	    -Wall \
 	    -DSBINDIR='"$(sbindir)"' \
 	    -I$(top_srcdir)/include \
 	    $(LIBOSMOCORE_CFLAGS) \
 	    $(NULL)
-libmisc_a_SOURCES = getopt1.c getopt.c ippool.c lookup.c tun.c debug.c
+libmisc_a_SOURCES = \
 		    checksum.c \
 		    debug.c \
 		    getopt.c \
 		    getopt1.c \
 		    icmpv6.c \
 		    in46_addr.c \
 		    ippool.c \
 		    lookup.c \
 		    netdev.c \
 		    netns.c \
 		    tun.c \
 		    util.c \
 		    $(NULL)
 if ENABLE_GTP_KERNEL
 AM_CFLAGS += -DGTP_KERNEL $(LIBGTPNL_CFLAGS)
 libmisc_a_SOURCES += gtp-kernel.c
 endif
--- a/lib/checksum.c
+++ b/lib/checksum.c
@@ -0,0 +1,211 @@
 /*
 *
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		IP/TCP/UDP checksumming routines
 *
 * Authors:	Jorge Cwik, <jorge@laser.satlink.net>
 *		Arnt Gulbrandsen, <agulbra@nvg.unit.no>
 *		Tom May, <ftom@netcom.com>
 *		Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>
 *		Lots of code moved from tcp.c and ip.c; see those files
 *		for more names.
 *
 * 03/02/96	Jes Sorensen, Andreas Schwab, Roman Hodek:
 *		Fixed some nasty bugs, causing some horrible crashes.
 *		A: At some points, the sum (%0) was used as
 *		length-counter instead of the length counter
 *		(%1). Thanks to Roman Hodek for pointing this out.
 *		B: GCC seems to mess up if one uses too many
 *		data-registers to hold input values and one tries to
 *		specify d0 and d1 as scratch registers. Letting gcc
 *		choose these registers itself solves the problem.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
 /* Revised by Kenneth Albanowski for m68knommu. Basic problem: unaligned access
 kills, so most of the assembly has to go. */
 #if defined(__FreeBSD__)
 #define _KERNEL	/* needed on FreeBSD 10.x for s6_addr32 */
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <sys/endian.h>
 #endif
 #include "checksum.h"
 #include <arpa/inet.h>
 static inline unsigned short from32to16(unsigned int x)
 {
 	/* add up 16-bit and 16-bit for 16+c bit */
 	x = (x & 0xffff) + (x >> 16);
 	/* add up carry.. */
 	x = (x & 0xffff) + (x >> 16);
 	return x;
 }
 static unsigned int do_csum(const unsigned char *buff, int len)
 {
 	int odd;
 	unsigned int result = 0;
 	if (len <= 0)
 		goto out;
 	odd = 1 & (unsigned long) buff;
 	if (odd) {
 #if BYTE_ORDER == LITTLE_ENDIAN
 		result += (*buff << 8);
 #else
 		result = *buff;
 #endif
 		len--;
 		buff++;
 	}
 	if (len >= 2) {
 		if (2 & (unsigned long) buff) {
 			result += *(unsigned short *) buff;
 			len -= 2;
 			buff += 2;
 		}
 		if (len >= 4) {
 			const unsigned char *end = buff + ((unsigned)len & ~3);
 			unsigned int carry = 0;
 			do {
 				unsigned int w = *(unsigned int *) buff;
 				buff += 4;
 				result += carry;
 				result += w;
 				carry = (w > result);
 			} while (buff < end);
 			result += carry;
 			result = (result & 0xffff) + (result >> 16);
 		}
 		if (len & 2) {
 			result += *(unsigned short *) buff;
 			buff += 2;
 		}
 	}
 	if (len & 1)
 #if BYTE_ORDER == LITTLE_ENDIAN
 		result += *buff;
 #else
 		result += (*buff << 8);
 #endif
 	result = from32to16(result);
 	if (odd)
 		result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
 out:
 	return result;
 }
 /*
 *	This is a version of ip_compute_csum() optimized for IP headers,
 *	which always checksum on 4 octet boundaries.
 */
 uint16_t ip_fast_csum(const void *iph, unsigned int ihl)
 {
 	return (uint16_t)~do_csum(iph, ihl*4);
 }
 /*
 * computes the checksum of a memory block at buff, length len,
 * and adds in "sum" (32-bit)
 *
 * returns a 32-bit number suitable for feeding into itself
 * or csum_tcpudp_magic
 *
 * this function must be called with even lengths, except
 * for the last fragment, which may be odd
 *
 * it's best to have buff aligned on a 32-bit boundary
 */
 uint32_t csum_partial(const void *buff, int len, uint32_t wsum)
 {
 	unsigned int sum = (unsigned int)wsum;
 	unsigned int result = do_csum(buff, len);
 	/* add in old sum, and carry.. */
 	result += sum;
 	if (sum > result)
 		result += 1;
 	return (uint32_t)result;
 }
 /*
 * this routine is used for miscellaneous IP-like checksums, mainly
 * in icmp.c
 */
 uint16_t ip_compute_csum(const void *buff, int len)
 {
 	return (uint16_t)~do_csum(buff, len);
 }
 uint16_t csum_ipv6_magic(const struct in6_addr *saddr,
 			const struct in6_addr *daddr,
 			uint32_t len, uint8_t proto, uint32_t csum)
 {
 	int carry;
 	uint32_t ulen;
 	uint32_t uproto;
 	uint32_t sum = (uint32_t)csum;
 	sum += (uint32_t)saddr->s6_addr32[0];
 	carry = (sum < (uint32_t)saddr->s6_addr32[0]);
 	sum += carry;
 	sum += (uint32_t)saddr->s6_addr32[1];
 	carry = (sum < (uint32_t)saddr->s6_addr32[1]);
 	sum += carry;
 	sum += (uint32_t)saddr->s6_addr32[2];
 	carry = (sum < (uint32_t)saddr->s6_addr32[2]);
 	sum += carry;
 	sum += (uint32_t)saddr->s6_addr32[3];
 	carry = (sum < (uint32_t)saddr->s6_addr32[3]);
 	sum += carry;
 	sum += (uint32_t)daddr->s6_addr32[0];
 	carry = (sum < (uint32_t)daddr->s6_addr32[0]);
 	sum += carry;
 	sum += (uint32_t)daddr->s6_addr32[1];
 	carry = (sum < (uint32_t)daddr->s6_addr32[1]);
 	sum += carry;
 	sum += (uint32_t)daddr->s6_addr32[2];
 	carry = (sum < (uint32_t)daddr->s6_addr32[2]);
 	sum += carry;
 	sum += (uint32_t)daddr->s6_addr32[3];
 	carry = (sum < (uint32_t)daddr->s6_addr32[3]);
 	sum += carry;
 	ulen = (uint32_t)htonl((uint32_t) len);
 	sum += ulen;
 	carry = (sum < ulen);
 	sum += carry;
 	uproto = (uint32_t)htonl(proto);
 	sum += uproto;
 	carry = (sum < uproto);
 	sum += carry;
 	return csum_fold((uint32_t)sum);
 }
 /* fold a partial checksum */
 uint16_t csum_fold(uint32_t csum)
 {
 	uint32_t sum = (uint32_t)csum;
 	sum = (sum & 0xffff) + (sum >> 16);
 	sum = (sum & 0xffff) + (sum >> 16);
 	return (uint16_t)~sum;
 }
--- a/lib/checksum.h
+++ b/lib/checksum.h
@@ -0,0 +1,13 @@
 #pragma once
 #include <stdint.h>
 #include <netinet/in.h>
 uint16_t ip_fast_csum(const void *iph, unsigned int ihl);
 uint32_t csum_partial(const void *buff, int len, uint32_t wsum);
 uint16_t ip_compute_csum(const void *buff, int len);
 uint16_t csum_ipv6_magic(const struct in6_addr *saddr,
 			const struct in6_addr *daddr,
 			uint32_t len, uint8_t proto, uint32_t csum);
 uint16_t csum_fold(uint32_t csum);
--- a/lib/debug.c
+++ b/lib/debug.c
@@ -24,6 +24,11 @@ static const struct log_info_cat default_categories[] = {
 	[DSGSN] = {
 		.name = "DSGSN",
 		.description = "SGSN Emulator",
 		.enabled = 1, .loglevel = LOGL_INFO,
 	},
 	[DICMP6] = {
 		.name = "DICMP6",
 		.description = "ICMPv6",
 		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 };
--- a/lib/gtp-kernel.c
+++ b/lib/gtp-kernel.c
@@ -0,0 +1,201 @@
 #ifdef __linux__
 #define _GNU_SOURCE 1		/* strdup() prototype, broken arpa/inet.h */
 #endif
 #include "../config.h"
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <inttypes.h>
 #include <sys/types.h>
 #include <arpa/inet.h>
 #include <net/if.h>
 #include <libgtpnl/gtp.h>
 #include <libgtpnl/gtpnl.h>
 #include <errno.h>
 #include <time.h>
 #include <osmocom/gtp/pdp.h>
 #include <osmocom/gtp/gtp.h>
 #include "../lib/tun.h"
 #include "../lib/syserr.h"
 #include "../lib/util.h"
 #include "../lib/ippool.h"
 #include "gtp-kernel.h"
 static void pdp_debug(const char *prefix, const char *devname, struct pdp_t *pdp)
 {
 	char buf4[INET_ADDRSTRLEN], buf6[INET6_ADDRSTRLEN];
 	struct ippoolm_t *peer;
 	struct in_addr ia;
 	buf4[0] = '\0';
 	if ((peer = pdp_get_peer_ipv(pdp, false)))
 		in46a_ntop(&peer->addr, buf4, sizeof(buf4));
 	buf6[0] = '\0';
 	if ((peer = pdp_get_peer_ipv(pdp, true)))
 		in46a_ntop(&peer->addr, buf6, sizeof(buf6));
 	gsna2in_addr(&ia, &pdp->gsnrc);
 	LOGPDPX(DGGSN, LOGL_DEBUG, pdp, "%s %s v%u TEID %"PRIx64" EUA=(%s,%s) SGSN=%s\n", prefix,
 		devname, pdp->version,
 		pdp->version == 0 ? pdp_gettid(pdp->imsi, pdp->nsapi) : pdp->teid_gn,
 		buf4, buf6, inet_ntoa(ia));
 }
 static struct {
 	int			genl_id;
 	struct mnl_socket	*nl;
 } gtp_nl;
 static int gtp_kernel_init_once(void)
 {
 	/* only initialize once */
 	if (gtp_nl.nl)
 		return 0;
 	gtp_nl.nl = genl_socket_open();
 	if (gtp_nl.nl == NULL) {
 		LOGP(DGGSN, LOGL_ERROR, "cannot create genetlink socket\n");
 		return -1;
 	}
 	gtp_nl.genl_id = genl_lookup_family(gtp_nl.nl, "gtp");
 	if (gtp_nl.genl_id < 0) {
 		LOGP(DGGSN, LOGL_ERROR, "cannot lookup GTP genetlink ID\n");
 		genl_socket_close(gtp_nl.nl);
 		gtp_nl.nl = NULL;
 		return -1;
 	}
 	LOGP(DGGSN, LOGL_NOTICE, "Initialized GTP kernel mode (genl ID is %d)\n", gtp_nl.genl_id);
 	return 0;
 }
 int gtp_kernel_create(int dest_ns, const char *devname, int fd0, int fd1u)
 {
 	if (gtp_kernel_init_once() < 0)
 		return -1;
 	return gtp_dev_create(dest_ns, devname, fd0, fd1u);
 }
 int gtp_kernel_create_sgsn(int dest_ns, const char *devname, int fd0, int fd1u)
 {
 	if (gtp_kernel_init_once() < 0)
 		return -1;
 	return gtp_dev_create_sgsn(dest_ns, devname, fd0, fd1u);
 }
 void gtp_kernel_stop(const char *devname)
 {
 	gtp_dev_destroy(devname);
 }
 int gtp_kernel_tunnel_add(struct pdp_t *pdp, const char *devname)
 {
 	int ms_addr_count;
 	struct in46_addr ms[2];
 	struct in46_addr sgsn;
 	struct gtp_tunnel *t;
 	int ret = 0;
 	pdp_debug(__func__, devname, pdp);
 	in46a_from_gsna(&pdp->gsnrc, &sgsn);
 	ms_addr_count = in46a_from_eua(&pdp->eua, ms);
 	if (ms_addr_count < 0)
 		return -1;
 	for (int i = 0; i < ms_addr_count; i++) {
 		t = gtp_tunnel_alloc();
 		if (t == NULL)
 			return -1;
 		gtp_tunnel_set_ifidx(t, if_nametoindex(devname));
 		gtp_tunnel_set_version(t, pdp->version);
 		if (in46a_to_af(&ms[i]) == AF_INET)
 			gtp_tunnel_set_ms_ip4(t, &ms[i].v4);
 		else {
 			/* In IPv6, EUA doesn't contain the actual IP
 			 * addr/prefix. Set higher bits to 0 to get the 64 bit
 			 * netmask. */
 			memset(((void *)&ms[i].v6) + 8, 0, 8);
 			gtp_tunnel_set_ms_ip6(t, &ms[i].v6);
 		}
 		if (in46a_to_af(&sgsn) == AF_INET)
 			gtp_tunnel_set_sgsn_ip4(t, &sgsn.v4);
 		else
 			gtp_tunnel_set_sgsn_ip6(t, &sgsn.v6);
 		if (pdp->version == 0) {
 			gtp_tunnel_set_tid(t, pdp_gettid(pdp->imsi, pdp->nsapi));
 			gtp_tunnel_set_flowid(t, pdp->flru);
 		} else {
 			gtp_tunnel_set_i_tei(t, pdp->teid_own);
 			/* use the TEI advertised by SGSN when sending packets
 			 * towards the SGSN */
 			gtp_tunnel_set_o_tei(t, pdp->teid_gn);
 		}
 		ret = gtp_add_tunnel(gtp_nl.genl_id, gtp_nl.nl, t);
 		gtp_tunnel_free(t);
 		if (ret != 0)
 			break;
 	}
 	return ret;
 }
 int gtp_kernel_tunnel_del(struct pdp_t *pdp, const char *devname)
 {
 	int ms_addr_count;
 	struct in46_addr ms[2];
 	struct gtp_tunnel *t;
 	int ret = 0;
 	pdp_debug(__func__, devname, pdp);
 	ms_addr_count = in46a_from_eua(&pdp->eua, ms);
 	if (ms_addr_count < 0)
 		return -1;
 	for (int i = 0; i < ms_addr_count; i++) {
 		t = gtp_tunnel_alloc();
 		if (t == NULL)
 			return -1;
 		gtp_tunnel_set_ifidx(t, if_nametoindex(devname));
 		gtp_tunnel_set_family(t, in46a_to_af(&ms[i]));
 		gtp_tunnel_set_version(t, pdp->version);
 		if (pdp->version == 0) {
 			gtp_tunnel_set_tid(t, pdp_gettid(pdp->imsi, pdp->nsapi));
 			gtp_tunnel_set_flowid(t, pdp->flru);
 		} else {
 			gtp_tunnel_set_i_tei(t, pdp->teid_own);
 		}
 		ret = gtp_del_tunnel(gtp_nl.genl_id, gtp_nl.nl, t);
 		gtp_tunnel_free(t);
 		if (ret != 0)
 			break;
 	}
 	return ret;
 }
--- a/lib/gtp-kernel.h
+++ b/lib/gtp-kernel.h
@@ -0,0 +1,38 @@
 #ifndef _GTP_KERNEL_H_
 #define _GTP_KERNEL_H_
 struct gengetopt_args_info;
 extern int debug;
 extern char *ipup;
 #ifdef GTP_KERNEL
 int gtp_kernel_create(int dest_ns, const char *devname, int fd0, int fd1u);
 int gtp_kernel_create_sgsn(int dest_ns, const char *devname, int fd0, int fd1u);
 void gtp_kernel_stop(const char *devname);
 int gtp_kernel_tunnel_add(struct pdp_t *pdp, const char *devname);
 int gtp_kernel_tunnel_del(struct pdp_t *pdp, const char *devname);
 #else
 static inline int gtp_kernel_create(int dest_ns, const char *devname, int fd0, int fd1u)
 {
 	SYS_ERR(DGGSN, LOGL_ERROR, 0, "ggsn compiled without GTP kernel support!\n");
 	return -1;
 }
 #define gtp_kernel_create_sgsn gtp_kernel_create
 static inline void gtp_kernel_stop(const char *devname) {}
 static inline int gtp_kernel_tunnel_add(struct pdp_t *pdp, const char *devname)
 {
 	return 0;
 }
 static inline int gtp_kernel_tunnel_del(struct pdp_t *pdp, const char *devname)
 {
 	return 0;
 }
 #endif
 #endif /* _GTP_KERNEL_H_ */
--- a/lib/icmpv6.c
+++ b/lib/icmpv6.c
@@ -0,0 +1,335 @@
 /* Minimal ICMPv6 code for generating router advertisements as required by
 * relevant 3GPP specs for a GGSN with IPv6 PDP contexts */
 /* (C) 2017 by Harald Welte <laforge@gnumonks.org>
 *
 * The contents of this file may be used under the terms of the GNU
 * General Public License Version 2, provided that the above copyright
 * notice and this permission notice is included in all copies or
 * substantial portions of the software.
 */
 #include <stdint.h>
 #include <stdbool.h>
 #include <string.h>
 #include <netinet/in.h>
 #if defined(__FreeBSD__)
 #include <sys/types.h>	/* FreeBSD 10.x needs this before ip6.h */
 #include <sys/endian.h>
 #endif
 #include <netinet/ip6.h>
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/utils.h>
 #include <osmocom/gtp/gtp.h>
 #include <osmocom/gtp/pdp.h>
 #include "checksum.h"
 #include "ippool.h"
 #include "syserr.h"
 #include "icmpv6.h"
 #include "config.h"
 /* 29.061 11.2.1.3.4 IPv6 Router Configuration Variables in GGSN */
 #define GGSN_MaxRtrAdvInterval	21600		/* 6 hours */
 #define GGSN_MinRtrAdvInterval 16200		/* 4.5 hours */
 #define GGSN_AdvValidLifetime	0xffffffff	/* infinite */
 #define GGSN_AdvPreferredLifetime 0xffffffff	/* infinite */
 /* RFC3307 link-local scope multicast address */
 const struct in6_addr all_router_mcast_addr = {
 	.s6_addr = { 0xff,0x02,0,0,  0,0,0,0, 0,0,0,0,  0,0,0,2 }
 };
 /* RFC4291  link-local solicited-node multicast address, FF02:0:0:0:0:1:FF, 104 bits = 13 bytes */
 const uint8_t solicited_node_mcast_addr_prefix[13] = {
 	0xff, 0x02, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x01,
 	0xFF
 };
 /* Prepends the ipv6 header and returns checksum content */
 uint16_t icmpv6_prepend_ip6hdr(struct msgb *msg, const struct in6_addr *saddr,
 				  const struct in6_addr *daddr)
 {
 	uint32_t len;
 	uint16_t skb_csum;
 	struct ip6_hdr *i6h;
 	/* checksum */
 	skb_csum = csum_partial(msgb_data(msg), msgb_length(msg), 0);
 	len = msgb_length(msg);
 	skb_csum = csum_ipv6_magic(saddr, daddr, len, IPPROTO_ICMPV6, skb_csum);
 	/* Push IPv6 header in front of ICMPv6 packet */
 	i6h = (struct ip6_hdr *) msgb_push(msg, sizeof(*i6h));
 	/* 4 bits version, 8 bits TC, 20 bits flow-ID */
 	i6h->ip6_ctlun.ip6_un1.ip6_un1_flow = htonl(0x60000000);
 	i6h->ip6_ctlun.ip6_un1.ip6_un1_plen = htons(len);
 	i6h->ip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_ICMPV6;
 	i6h->ip6_ctlun.ip6_un1.ip6_un1_hlim = 255;
 	i6h->ip6_src = *saddr;
 	i6h->ip6_dst = *daddr;
 	return skb_csum;
 }
 /*! construct a RFC4861 compliant ICMPv6 router soliciation
 *  \param[in] saddr Source IPv6 address for router advertisement
 *  \param[in] daddr Destination IPv6 address for router advertisement IPv6 header
 *  \param[in] prefix The single prefix to be advertised (/64 implied!)
 *  \returns callee-allocated message buffer containing router advertisement */
 struct msgb *icmpv6_construct_rs(const struct in6_addr *saddr)
 {
 	struct msgb *msg = msgb_alloc_headroom(512,128, "IPv6 RS");
 	struct icmpv6_rsol_hdr *rs;
 	OSMO_ASSERT(msg);
 	rs = (struct icmpv6_rsol_hdr *) msgb_put(msg, sizeof(*rs));
 	rs->hdr.type = 133;	/* see RFC4861 4.1 */
 	rs->hdr.code = 0;	/* see RFC4861 4.1 */
 	rs->hdr.csum = 0;	/* updated below */
 	rs->reserved = 0;	/* see RFC4861 4.1 */
 	rs->hdr.csum = icmpv6_prepend_ip6hdr(msg, saddr, &all_router_mcast_addr);
 	return msg;
 }
 /*! construct a 3GPP 29.061 compliant router advertisement for a given prefix
 *  \param[in] saddr Source IPv6 address for router advertisement
 *  \param[in] daddr Destination IPv6 address for router advertisement IPv6 header
 *  \param[in] prefix The single prefix to be advertised (/64 implied!)
 *  \returns callee-allocated message buffer containing router advertisement */
 static struct msgb *icmpv6_construct_ra(const struct in6_addr *saddr,
 				 const struct in6_addr *daddr,
 				 const struct in6_addr *prefix,
 				 uint32_t mtu)
 {
 	struct msgb *msg = msgb_alloc_headroom(512,128, "IPv6 RA");
 	struct icmpv6_radv_hdr *ra;
 	struct icmpv6_opt_prefix *ra_opt_pref;
 	struct icmpv6_opt_mtu *ra_opt_mtu;
 	OSMO_ASSERT(msg);
 	ra = (struct icmpv6_radv_hdr *) msgb_put(msg, sizeof(*ra));
 	ra->hdr.type = 134;	/* see RFC4861 4.2 */
 	ra->hdr.code = 0;	/* see RFC4861 4.2 */
 	ra->hdr.csum = 0;	/* updated below */
 	ra->cur_ho_limit = 64;	/* seems reasonable? */
 	/* the GGSN shall leave the M-flag cleared in the Router
 	 * Advertisement messages */
 	ra->m = 0;
 	/* The GGSN may set the O-flag if there are additional
 	 * configuration parameters that need to be fetched by the MS */
 	ra->o = 0;		/* no DHCPv6 */
 	ra->res = 0;
 	/* RFC4861 Default: 3 * MaxRtrAdvInterval */
 	ra->router_lifetime = htons(3*GGSN_MaxRtrAdvInterval);
 	ra->reachable_time = 0;	/* Unspecified */
 	/* RFC4861 Section 4.6.2 */
 	ra_opt_pref = (struct icmpv6_opt_prefix *) msgb_put(msg, sizeof(*ra_opt_pref));
 	ra_opt_pref->hdr.type = 3;	/* RFC4861 4.6.2 */
 	ra_opt_pref->hdr.len = 4;	/* RFC4861 4.6.2 */
 	ra_opt_pref->prefix_len = 64;	/* only prefix length as per 3GPP */
 	/* The Prefix is contained in the Prefix Information Option of
 	 * the Router Advertisements and shall have the A-flag set
 	 * and the L-flag cleared */
 	ra_opt_pref->a = 1;
 	ra_opt_pref->l = 0;
 	ra_opt_pref->res = 0;
 	/*  The lifetime of the prefix shall be set to infinity */
 	ra_opt_pref->valid_lifetime = htonl(GGSN_AdvValidLifetime);
 	ra_opt_pref->preferred_lifetime = htonl(GGSN_AdvPreferredLifetime);
 	ra_opt_pref->res2 = 0;
 	memcpy(ra_opt_pref->prefix, prefix, sizeof(ra_opt_pref->prefix));
 	/* RFC4861 Section 4.6.4, MTU */
 	ra_opt_mtu = (struct icmpv6_opt_mtu *) msgb_put(msg, sizeof(*ra_opt_mtu));
 	ra_opt_mtu->hdr.type = 5;	/* RFC4861 4.6.4 */
 	ra_opt_mtu->hdr.len = 1;	/* RFC4861 4.6.4 */
 	ra_opt_mtu->reserved = 0;
 	ra_opt_mtu->mtu = htonl(mtu);
 	/* The Prefix is contained in the Prefix Information Option of
 	 * the Router Advertisements and shall have the A-flag set
 	 * and the L-flag cleared */
 	ra_opt_pref->a = 1;
 	ra_opt_pref->l = 0;
 	ra_opt_pref->res = 0;
 	/*  The lifetime of the prefix shall be set to infinity */
 	ra_opt_pref->valid_lifetime = htonl(GGSN_AdvValidLifetime);
 	ra_opt_pref->preferred_lifetime = htonl(GGSN_AdvPreferredLifetime);
 	ra_opt_pref->res2 = 0;
 	memcpy(ra_opt_pref->prefix, prefix, sizeof(ra_opt_pref->prefix));
 	/* checksum */
 	ra->hdr.csum = icmpv6_prepend_ip6hdr(msg, saddr, daddr);
 	return msg;
 }
 /* Validate an ICMPv6 router solicitation according to RFC4861 6.1.1 */
 static bool icmpv6_validate_router_solicit(const uint8_t *pack, unsigned len)
 {
 	const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
 	//const struct icmpv6_hdr *ic6h = (struct icmpv6_hdr *) (pack + sizeof(*ip6h));
 	/* Hop limit field must have 255 */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_hlim != 255)
 		return false;
 	/* FIXME: ICMP checksum is valid */
 	/* ICMP length (derived from IP length) is 8 or more octets */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_plen < 8)
 		return false;
 	/* FIXME: All included options have a length > 0 */
 	/* FIXME: If IP source is unspecified, no source link-layer addr option */
 	return true;
 }
 /* Validate an ICMPv6 neighbor solicitation according to RFC4861 7.1.1 */
 static bool icmpv6_validate_neigh_solicit(const uint8_t *pack, unsigned len)
 {
 	const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
 	/* Hop limit field must have 255 */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_hlim != 255)
 		return false;
 	/* FIXME: ICMP checksum is valid */
 	/* ICMP length (derived from IP length) is 24 or more octets */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_plen < 24)
 		return false;
 	/* FIXME: All included options have a length > 0 */
 	/* FIXME: If the IP source address is the unspecified address, the IP
 	 * destination address is a solicited-node multicast address. */
 	/* FIXME: If IP source is unspecified, no source link-layer addr option */
 	return true;
 }
 /* Validate an ICMPv6 router advertisement according to RFC4861 6.1.2.
   Returns pointer packet header on success, NULL otherwise. */
 struct icmpv6_radv_hdr *icmpv6_validate_router_adv(const uint8_t *pack, unsigned len)
 {
 	const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
 	const struct icmpv6_hdr *ic6h = (struct icmpv6_hdr *) (pack + sizeof(*ip6h));
 	/* ICMP length (derived from IP length) is 16 or more octets */
 	if (len < sizeof(*ip6h) + 16)
 		return NULL;
 	if (ic6h->type != 134) /* router advertismenet type */
 		return NULL;
 	/*Routers must use their link-local address */
 	if (!IN6_IS_ADDR_LINKLOCAL(&ip6h->ip6_src))
 		return NULL;
 	/* Hop limit field must have 255 */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_hlim != 255)
 		return NULL;
 	/* ICMP Code is 0 */
 	if (ic6h->code != 0)
 		return NULL;
 	/* ICMP length (derived from IP length) is 16 or more octets */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_plen < 16)
 		return NULL;
 	/* FIXME: All included options have a length > 0 */
 	/* FIXME: If IP source is unspecified, no source link-layer addr option */
 	return (struct icmpv6_radv_hdr *)ic6h;
 }
 /* handle incoming packets to the all-routers multicast address */
 int handle_router_mcast(struct gsn_t *gsn, struct pdp_t *pdp,
 			const struct in6_addr *pdp_prefix,
 			const struct in6_addr *own_ll_addr,
 			uint32_t mtu,
 			const uint8_t *pack, unsigned len)
 {
 	const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
 	const struct icmpv6_hdr *ic6h = (struct icmpv6_hdr *) (pack + sizeof(*ip6h));
 	struct msgb *msg;
 	if (len < sizeof(*ip6h)) {
 		LOGP(DICMP6, LOGL_NOTICE, "Packet too short: %u bytes\n", len);
 		return -1;
 	}
 	/* we only treat ICMPv6 here */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_ICMPV6) {
 		LOGP(DICMP6, LOGL_DEBUG, "Ignoring non-ICMP to all-routers mcast\n");
 		return 0;
 	}
 	if (len < sizeof(*ip6h) + sizeof(*ic6h)) {
 		LOGP(DICMP6, LOGL_NOTICE, "Short ICMPv6 packet: %s\n", osmo_hexdump(pack, len));
 		return -1;
 	}
 	switch (ic6h->type) {
 	case 133:	/* router solicitation */
 		if (ic6h->code != 0) {
 			LOGP(DICMP6, LOGL_NOTICE, "ICMPv6 type 133 but code %d\n", ic6h->code);
 			return -1;
 		}
 		if (!icmpv6_validate_router_solicit(pack, len)) {
 			LOGP(DICMP6, LOGL_NOTICE, "Invalid Router Solicitation: %s\n",
 				osmo_hexdump(pack, len));
 			return -1;
 		}
 		/* Send router advertisement from GGSN link-local
 		 * address to MS link-local address, including prefix
 		 * allocated to this PDP context */
 		msg = icmpv6_construct_ra(own_ll_addr, &ip6h->ip6_src, pdp_prefix, mtu);
 		/* Send the constructed RA to the MS */
 		gtp_data_req(gsn, pdp, msgb_data(msg), msgb_length(msg));
 		msgb_free(msg);
 		break;
 	default:
 		LOGP(DICMP6, LOGL_DEBUG, "Unknown ICMPv6 type %u\n", ic6h->type);
 		break;
 	}
 	return 0;
 }
 /* handle incoming packets to the solicited-node multicast address */
 int handle_solicited_node_mcast(const uint8_t *pack, unsigned len)
 {
 	const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
 	const struct icmpv6_hdr *ic6h = (struct icmpv6_hdr *) (pack + sizeof(*ip6h));
 	if (len < sizeof(*ip6h)) {
 		LOGP(DICMP6, LOGL_NOTICE, "Packet too short: %u bytes\n", len);
 		return -1;
 	}
 	/* we only treat ICMPv6 here */
 	if (ip6h->ip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_ICMPV6) {
 		LOGP(DICMP6, LOGL_DEBUG, "Ignoring non-ICMP solicited-node mcast\n");
 		return 0;
 	}
 	if (len < sizeof(*ip6h) + sizeof(*ic6h)) {
 		LOGP(DICMP6, LOGL_NOTICE, "Short ICMPv6 packet: %s\n", osmo_hexdump(pack, len));
 		return -1;
 	}
 	switch (ic6h->type) {
 	case 135: /* Neighbor Solicitation. RFC2461, RFC2462 */
 		if (ic6h->code != 0) {
 			LOGP(DICMP6, LOGL_NOTICE, "ICMPv6 type 135 but code %d\n", ic6h->code);
 			return -1;
 		}
 		if (!icmpv6_validate_neigh_solicit(pack, len)) {
 			LOGP(DICMP6, LOGL_NOTICE, "Invalid Neighbor Solicitation: %s\n",
 				osmo_hexdump(pack, len));
 			return -1;
 		}
 		/* RFC 2462: Ignore Neighbor (Duplicate Address Detection) */
 		LOGP(DICMP6, LOGL_DEBUG, "Ignoring Rx ICMPv6 Neighbor Soliciation: %s\n", osmo_hexdump(pack, len));
 		break;
 	default:
 		LOGP(DICMP6, LOGL_DEBUG, "Unknown ICMPv6 type %u\n", ic6h->type);
 		break;
 	}
 	return 0;
 }
--- a/lib/icmpv6.h
+++ b/lib/icmpv6.h
@@ -0,0 +1,109 @@
 #pragma once
 #include <stdbool.h>
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/endian.h>
 #include <osmocom/gtp/gtp.h>
 #include <osmocom/gtp/pdp.h>
 #define ICMPv6_OPT_TYPE_PREFIX_INFO 0x03
 #define foreach_icmpv6_opt(icmpv6_pkt, icmpv6_len, opt_hdr) \
 		for (opt_hdr = (struct icmpv6_opt_hdr *)(icmpv6_pkt)->options; \
 		     (uint8_t*)(opt_hdr) + sizeof(struct icmpv6_opt_hdr) <= (((uint8_t*)(icmpv6_pkt)) + (icmpv6_len)); \
 		     opt_hdr = (struct icmpv6_opt_hdr*)((uint8_t*)(opt_hdr) + (opt_hdr)->len) \
 		    )
 struct icmpv6_hdr {
 	uint8_t type;
 	uint8_t code;
 	uint16_t csum;
 } __attribute__ ((packed));
 struct icmpv6_echo_hdr {
 	struct icmpv6_hdr hdr;
 	uint16_t ident;		/* Identifier */
 	uint16_t seq;		/* Sequence number */
 	uint8_t data[0];	/* Data */
 } __attribute__ ((packed));
 /* RFC4861 Section 4.1 */
 struct icmpv6_rsol_hdr {
 	struct icmpv6_hdr hdr;
 	uint32_t reserved;
 	uint8_t options[0];
 } __attribute__ ((packed));
 /* RFC4861 Section 4.2 */
 struct icmpv6_radv_hdr {
 	struct icmpv6_hdr hdr;
 	uint8_t cur_ho_limit;
 #if OSMO_IS_LITTLE_ENDIAN
 	uint8_t res:6,
 		m:1,
 		o:1;
 #elif OSMO_IS_BIG_ENDIAN
 /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
 	uint8_t o:1, m:1, res:6;
 #endif
 	uint16_t router_lifetime;
 	uint32_t reachable_time;
 	uint32_t retrans_timer;
 	uint8_t options[0];
 } __attribute__ ((packed));
 /* RFC4861 Section 4.6 */
 struct icmpv6_opt_hdr {
 	uint8_t type;
 	/* length in units of 8 octets, including type+len! */
 	uint8_t len;
 	uint8_t data[0];
 } __attribute__ ((packed));
 /* RFC4861 Section 4.6.2 */
 struct icmpv6_opt_prefix {
 	struct icmpv6_opt_hdr hdr;
 	uint8_t prefix_len;
 #if OSMO_IS_LITTLE_ENDIAN
 	uint8_t res:6,
 		a:1,
 		l:1;
 #elif OSMO_IS_BIG_ENDIAN
 /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
 	uint8_t l:1, a:1, res:6;
 #endif
 	uint32_t valid_lifetime;
 	uint32_t preferred_lifetime;
 	uint32_t res2;
 	uint8_t prefix[16];
 } __attribute__ ((packed));
 /* RFC4861 Section 4.6.4 */
 struct icmpv6_opt_mtu {
 	struct icmpv6_opt_hdr hdr;
 	uint16_t reserved;
 	uint32_t mtu;
 } __attribute__ ((packed));
 uint16_t icmpv6_prepend_ip6hdr(struct msgb *msg, const struct in6_addr *saddr,
 				  const struct in6_addr *daddr);
 struct msgb *icmpv6_construct_rs(const struct in6_addr *saddr);
 int handle_router_mcast(struct gsn_t *gsn, struct pdp_t *pdp,
 			const struct in6_addr *pdp_prefix,
 			const struct in6_addr *own_ll_addr,
 			uint32_t mtu,
 			const uint8_t *pack, unsigned len);
 int handle_solicited_node_mcast(const uint8_t *pack, unsigned len);
 struct icmpv6_radv_hdr *icmpv6_validate_router_adv(const uint8_t *pack, unsigned len);
 /* RFC3307 link-local scope multicast address */
 extern const struct in6_addr all_router_mcast_addr;
 extern const uint8_t solicited_node_mcast_addr_prefix[13];
--- a/lib/in46_addr.c
+++ b/lib/in46_addr.c
@@ -0,0 +1,384 @@
 /*
 * IPv4/v6 address functions.
 * Copyright (C) 2017 by Harald Welte <laforge@gnumonks.org>
 *
 * The contents of this file may be used under the terms of the GNU
 * General Public License Version 2, provided that the above copyright
 * notice and this permission notice is included in all copies or
 * substantial portions of the software.
 *
 */
 #include "../lib/in46_addr.h"
 #include <osmocom/gtp/pdp.h>
 #include <osmocom/core/utils.h>
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <stdlib.h>
 #include <string.h>
 /*! Return the address family of given \reff in46_addr argument */
 int in46a_to_af(const struct in46_addr *in)
 {
 	switch (in->len) {
 	case 4:
 		return AF_INET;
 	case 8:
 	case 16:
 		return AF_INET6;
 	default:
 		OSMO_ASSERT(0);
 		return -1;
 	}
 }
 /*! Convert \ref in46_addr to sockaddr_storage */
 int in46a_to_sas(struct sockaddr_storage *out, const struct in46_addr *in)
 {
 	struct sockaddr_in *sin = (struct sockaddr_in *)out;
 	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)out;
 	switch (in->len) {
 	case 4:
 		sin->sin_family = AF_INET;
 		sin->sin_addr = in->v4;
 		break;
 	case 16:
 		sin6->sin6_family = AF_INET6;
 		sin6->sin6_addr = in->v6;
 		break;
 	default:
 		OSMO_ASSERT(0);
 		return -1;
 	}
 	return 0;
 }
 /*! Convenience wrapper around inet_ntop() for in46_addr.
 *  \param[in] in the in46_addr to print
 *  \param[out] dst destination buffer where string representation of the address is stored
 *  \param[out] dst_size size dst. Usually it should be at least INET6_ADDRSTRLEN.
 *  \return address of dst on success, NULL on error */
 const char *in46a_ntop(const struct in46_addr *in, char *dst, socklen_t dst_size)
 {
 	int af;
 	if (!in || in->len == 0) {
 		strncpy(dst, "UNDEFINED", dst_size);
 		return dst;
 	}
 	af = in46a_to_af(in);
 	if (af < 0)
 		return NULL;
 	return inet_ntop(af, (const void *) &in->v4, dst, dst_size);
 }
 /* like inet_ntoa() */
 const char *in46a_ntoa(const struct in46_addr *in46)
 {
 	static char addrstr_buf[256];
 	if (in46a_ntop(in46, addrstr_buf, sizeof(addrstr_buf)) < 0)
 		return "INVALID";
 	else
 		return addrstr_buf;
 }
 const char *in46p_ntoa(const struct in46_prefix *in46p)
 {
 	static char addrstr_buf[256];
 	snprintf(addrstr_buf, sizeof(addrstr_buf), "%s/%u", in46a_ntoa(&in46p->addr), in46p->prefixlen);
 	return addrstr_buf;
 }
 /*! Determine if two in46_addr are equal or not
 *  \returns 1 in case they are equal; 0 otherwise */
 int in46a_equal(const struct in46_addr *a, const struct in46_addr *b)
 {
 	if (a->len == b->len && !memcmp(&a->v6, &b->v6, a->len))
 		return 1;
 	else
 		return 0;
 }
 /*! Determine if two in46_addr prefix are equal or not
 *  The prefix length is determined by the shortest of the prefixes of a and b
 *  \returns 1 in case the common prefix are equal; 0 otherwise */
 int in46a_prefix_equal(const struct in46_addr *a, const struct in46_addr *b)
 {
 	unsigned int len;
 	if (a->len > b->len)
 		len = b->len;
 	else
 		len = a->len;
 	if (!memcmp(&a->v6, &b->v6, len))
 		return 1;
 	else
 		return 0;
 }
 /*! Match if IPv6 addr1 + addr2 are within same \a mask */
 static int ipv6_within_mask(const struct in6_addr *addr1, const struct in6_addr *addr2,
 			    const struct in6_addr *mask)
 {
 	struct in6_addr masked = *addr2;
 #if defined(__linux__)
 	masked.s6_addr32[0] &= mask->s6_addr32[0];
 	masked.s6_addr32[1] &= mask->s6_addr32[1];
 	masked.s6_addr32[2] &= mask->s6_addr32[2];
 	masked.s6_addr32[3] &= mask->s6_addr32[3];
 #else
 	masked.__u6_addr.__u6_addr32[0] &= mask->__u6_addr.__u6_addr32[0];
 	masked.__u6_addr.__u6_addr32[1] &= mask->__u6_addr.__u6_addr32[1];
 	masked.__u6_addr.__u6_addr32[2] &= mask->__u6_addr.__u6_addr32[2];
 	masked.__u6_addr.__u6_addr32[3] &= mask->__u6_addr.__u6_addr32[3];
 #endif
 	if (!memcmp(addr1, &masked, sizeof(struct in6_addr)))
 		return 1;
 	else
 		return 0;
 }
 /*! Create an IPv6 netmask from the given prefix length */
 static void create_ipv6_netmask(struct in6_addr *netmask, int prefixlen)
 {
 	uint32_t *p_netmask;
 	memset(netmask, 0, sizeof(struct in6_addr));
 	if (prefixlen < 0)
 		prefixlen = 0;
 	else if (128 < prefixlen)
 		prefixlen = 128;
 #if defined(__linux__)
 	p_netmask = &netmask->s6_addr32[0];
 #else
 	p_netmask = &netmask->__u6_addr.__u6_addr32[0];
 #endif
 	while (32 < prefixlen) {
 		*p_netmask = 0xffffffff;
 		p_netmask++;
 		prefixlen -= 32;
 	}
 	if (prefixlen != 0) {
 		*p_netmask = htonl(0xFFFFFFFF << (32 - prefixlen));
 	}
 }
 /*! Determine if given \a addr is within given \a net + \a prefixlen
 *  Builds the netmask from \a net + \a prefixlen and matches it to \a addr
 *  \returns 1 in case of a match, 0 otherwise */
 int in46a_within_mask(const struct in46_addr *addr, const struct in46_addr *net, size_t prefixlen)
 {
 	struct in_addr netmask;
 	struct in6_addr netmask6;
 	if (addr->len != net->len)
 		return 0;
 	switch (addr->len) {
 	case 4:
 		netmask.s_addr = htonl(0xFFFFFFFF << (32 - prefixlen));
 		if ((addr->v4.s_addr & netmask.s_addr) == net->v4.s_addr)
 			return 1;
 		else
 			return 0;
 	case 16:
 		create_ipv6_netmask(&netmask6, prefixlen);
 		return ipv6_within_mask(&addr->v6, &net->v6, &netmask6);
 	default:
 		OSMO_ASSERT(0);
 		return 0;
 	}
 }
 static unsigned int ipv4_netmasklen(const struct in_addr *netmask)
 {
 	uint32_t bits = netmask->s_addr;
 	uint8_t *b = (uint8_t*) &bits;
 	unsigned int i, prefix = 0;
 	for (i = 0; i < 4; i++) {
 		while (b[i] & 0x80) {
 			prefix++;
 			b[i] = b[i] << 1;
 		}
 	}
 	return prefix;
 }
 static unsigned int ipv6_netmasklen(const struct in6_addr *netmask)
 {
 	#if defined(__linux__)
 		#define ADDRFIELD(i) s6_addr32[i]
 	#else
 		#define ADDRFIELD(i) __u6_addr.__u6_addr32[i]
 	#endif
 	unsigned int i, j, prefix = 0;
 	for (j = 0; j < 4; j++) {
 		uint32_t bits = netmask->ADDRFIELD(j);
 		uint8_t *b = (uint8_t*) &bits;
 		for (i = 0; i < 4; i++) {
 			while (b[i] & 0x80) {
 				prefix++;
 				b[i] = b[i] << 1;
 			}
 		}
 	}
 	#undef ADDRFIELD
 	return prefix;
 }
 /*! Convert netmask to prefix length representation
 *  \param[in] netmask in46_addr containing a netmask (consecutive list of 1-bit followed by consecutive list of 0-bit)
 *  \returns prefix length representation of the netmask (count of 1-bit from the start of the netmask)
 */
 unsigned int in46a_netmasklen(const struct in46_addr *netmask)
 {
 	switch (netmask->len) {
 	case 4:
 		return ipv4_netmasklen(&netmask->v4);
 	case 16:
 		return ipv6_netmasklen(&netmask->v6);
 	default:
 		OSMO_ASSERT(0);
 		return 0;
 	}
 }
 /*! Convert given array of in46_addr to PDP End User Address
 *  \param[in] src Array containing 1 or 2 in46_addr
 *  \param[out] eua End User Address structure to fill
 *  \returns 0 on success; negative on error
 *
 * In case size is 2, this function expects to find exactly one IPv4 and one
 * IPv6 addresses in src. */
 int in46a_to_eua(const struct in46_addr *src, unsigned int size, struct ul66_t *eua)
 {
 	const struct in46_addr *src_v4, *src_v6;
 	if (size == 1) {
 		switch (src->len) {
 		case 4:
 			eua->l = 6;
 			eua->v[0] = PDP_EUA_ORG_IETF;
 			eua->v[1] = PDP_EUA_TYPE_v4;
 			memcpy(&eua->v[2], &src->v4, 4);	/* Copy a 4 byte address */
 			break;
 		case 8:
 		case 16:
 			eua->l = 18;
 			eua->v[0] = PDP_EUA_ORG_IETF;
 			eua->v[1] = PDP_EUA_TYPE_v6;
 			memcpy(&eua->v[2], &src->v6, 16);	/* Copy a 16 byte address */
 			break;
 		default:
 			OSMO_ASSERT(0);
 			return -1;
 		}
 		return 0;
 	}
 	if (src[0].len == src[1].len)
 		return -1; /* we should have a v4 and a v6 address */
 	src_v4 = (src[0].len == 4) ? &src[0] : &src[1];
 	src_v6 = (src[0].len == 4) ? &src[1] : &src[0];
 	eua->l = 22;
 	eua->v[0] = PDP_EUA_ORG_IETF;
 	eua->v[1] = PDP_EUA_TYPE_v4v6;
 	memcpy(&eua->v[2], &src_v4->v4, 4);
 	memcpy(&eua->v[6], &src_v6->v6, 16);
 	return 0;
 }
 /*! Convert given PDP End User Address to an array of in46_addr
 *  \param[in] eua End User Address structure to parse
 *  \param[out] dst Array containing 2 in46_addr
 *  \returns number of parsed addresses (1 or 2) on success; negative on error
 *
 * This function expects to receive an End User Address struct together with an
 * array of 2 zeroed in46_addr structs. The in46_addr structs are filled in
 * order, hence if the function returns 1 the parsed address will be stored in
 * the first struct and the second one will be left intact. If 2 is returned, it
 * is guaranteed that one of them is an IPv4 and the other one is an IPv6, but
 * the order in which they are presented is not specified and must be
 * discovered for instance by checking the len field of each address.
 */
 int in46a_from_eua(const struct ul66_t *eua, struct in46_addr *dst)
 {
 	if (eua->l < 2)
 		goto default_to_dyn_v4;
 	if (eua->v[0] != 0xf1)
 		return -1;
 	switch (eua->v[1]) {
 	case PDP_EUA_TYPE_v4:
 		dst->len = 4;
 		if (eua->l >= 6)
 			memcpy(&dst->v4, &eua->v[2], 4);	/* Copy a 4 byte address */
 		else
 			dst->v4.s_addr = 0;
 		return 1;
 	case PDP_EUA_TYPE_v6:
 		dst->len = 16;
 		if (eua->l >= 18)
 			memcpy(&dst->v6, &eua->v[2], 16);	/* Copy a 16 byte address */
 		else
 			memset(&dst->v6, 0, 16);
 		return 1;
 	case PDP_EUA_TYPE_v4v6:
 		/* 3GPP TS 29.060, section 7.7.27 */
 		switch (eua->l) {
 			case 2: /* v4 & v6 dynamic */
 				dst[0].v4.s_addr = 0;
 				memset(&dst[1].v6, 0, 16);
 				break;
 			case 6: /* v4 static, v6 dynamic */
 				memcpy(&dst[0].v4, &eua->v[2], 4);
 				memset(&dst[1].v6, 0, 16);
 				break;
 			case 18: /* v4 dynamic, v6 static */
 				dst[0].v4.s_addr = 0;
 				memcpy(&dst[1].v6, &eua->v[2], 16);
 				break;
 			case 22:  /* v4 & v6 static */
 				memcpy(&dst[0].v4, &eua->v[2], 4);
 				memcpy(&dst[1].v6, &eua->v[6], 16);
 				break;
 			default:
 				return -1;
 		}
 		dst[0].len = 4;
 		dst[1].len = 16;
 		return 2;
 	default:
 		return -1;
 	}
 default_to_dyn_v4:
 	/* assume dynamic IPv4 by default */
 	dst->len = 4;
 	dst->v4.s_addr = 0;
 	return 1;
 }
 void in46a_from_gsna(const struct ul16_t *in, struct in46_addr *dst)
 {
 	dst->len = in->l;
 	OSMO_ASSERT(in->l <= sizeof(dst->v6));
 	memcpy(&dst->v6, in->v, in->l);
 }
--- a/lib/in46_addr.h
+++ b/lib/in46_addr.h
@@ -0,0 +1,43 @@
 #pragma once
 #include <stdint.h>
 #include <netinet/in.h>
 #include <osmocom/gtp/pdp.h>
 /* a simple wrapper around an in6_addr to also contain the length of the address,
 * thereby implicitly indicating the address family of the address */
 struct in46_addr {
 	uint8_t len;
 	union {
 		struct in_addr v4;
 		struct in6_addr v6;
 	};
 };
 struct in46_prefix {
 	struct in46_addr addr;
 	uint8_t prefixlen;
 };
 extern int in46a_to_af(const struct in46_addr *in);
 extern int in46a_to_sas(struct sockaddr_storage *out, const struct in46_addr *in);
 extern const char *in46a_ntop(const struct in46_addr *in, char *dst, socklen_t dst_size);
 extern const char *in46a_ntoa(const struct in46_addr *in46);
 extern const char *in46p_ntoa(const struct in46_prefix *in46p);
 extern int in46a_equal(const struct in46_addr *a, const struct in46_addr *b);
 extern int in46a_prefix_equal(const struct in46_addr *a, const struct in46_addr *b);
 extern int in46a_within_mask(const struct in46_addr *addr, const struct in46_addr *net, size_t prefixlen);
 unsigned int in46a_netmasklen(const struct in46_addr *netmask);
 int in46a_to_eua(const struct in46_addr *src, unsigned int size, struct ul66_t *eua);
 int in46a_from_eua(const struct ul66_t *eua, struct in46_addr *dst);
 static inline bool in46a_is_v6(const struct in46_addr *addr) {
 	return addr->len == 8 || addr->len == 16;
 }
 static inline bool in46a_is_v4(const struct in46_addr *addr) {
 	return addr->len == sizeof(struct in_addr);
 }
 void in46a_from_gsna(const struct ul16_t *in, struct in46_addr *dst);
--- a/Show More
+++ b/Show More
		`@@ -0,0 +1,2 @@`
							`# Most recent version of the package that added new symbols (OS#5318)`
							`libgtp 11 libgtp11 (>= 1.13.0)`
		`@@ -1,2 +0,0 @@`
			`examples/ggsn.conf`
			`examples/sgsnemu.conf`
		`@@ -0,0 +1,3 @@`
							`#pragma once`

							`void gtp_queue_timer_start(struct gsn_t *gsn);`