WIP: simcom2rtp bridge, interfacing SIMcom audio over USB to RTP

Change-Id: Id3f8633fae8881c2168d61732371e65eaff140ad

.gitignore

@@ -61,3 +61,5 @@ doc/manuals/generated/
 doc/manuals/osmomsc-usermanual.xml
 doc/manuals/common
 doc/manuals/build
+
+contrib/osmo-mgw.spec

Makefile.am

@@ -9,10 +9,10 @@ AM_CPPFLAGS = \
 	$(NULL)
 
 SUBDIRS = \
-	doc \
 	include \
 	src \
 	tests \
+	doc \
 	contrib \
 	$(NULL)
 
@@ -22,7 +22,13 @@ pkgconfig_DATA = \
 	$(NULL)
 
 BUILT_SOURCES = $(top_srcdir)/.version
-EXTRA_DIST = git-version-gen osmoappdesc.py .version
+EXTRA_DIST = \
+	     .version \
+	     contrib/osmo-mgw.spec.in \
+	     debian \
+	     git-version-gen \
+	     osmoappdesc.py \
+	     $(NULL)
 
 AM_DISTCHECK_CONFIGURE_FLAGS = \
 	--with-systemdsystemunitdir=$$dc_install_base/$(systemdsystemunitdir)

TODO-RELEASE

@@ -24,3 +24,5 @@
 # If any interfaces have been removed or changed since the last public release, a=0.
 #
 #library		what		description / commit summary line
+osmo-mgw        update osmo-gsm-manuals dependency to > 0.3.0 for vty_cpu_sched.adoc include
+libosmo-mgcp-client     mgcp_response, mgcp_conn_peer   struct size change, breaks ABI

configure.ac

@@ -22,6 +22,11 @@ AC_PROG_CC
 AC_PROG_INSTALL
 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
@@ -38,11 +43,17 @@ dnl checks for libraries
 AC_SEARCH_LIBS([dlopen], [dl dld], [LIBRARY_DL="$LIBS";LIBS=""])
 AC_SUBST(LIBRARY_DL)
 
+AC_SEARCH_LIBS([dlsym], [dl dld], [LIBRARY_DLSYM="$LIBS";LIBS=""])
+AC_SUBST(LIBRARY_DLSYM)
 
-PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.0.0)
-PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.0.0)
-PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.0.0)
+
+PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.4.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.4.0)
+PKG_CHECK_MODULES(LIBOSMOCTRL, libosmoctrl >= 1.4.0)
+PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.4.0)
 PKG_CHECK_MODULES(LIBOSMONETIF, libosmo-netif >= 0.6.0)
+PKG_CHECK_MODULES(LIBOSMOABIS, libosmoabis >= 1.0.0)
+PKG_CHECK_MODULES(LIBOSMOTRAU, libosmotrau >= 1.0.0)
 
 AC_ARG_ENABLE(sanitize,
 	[AS_HELP_STRING(
@@ -200,4 +211,5 @@ AC_OUTPUT(
     doc/manuals/Makefile
     contrib/Makefile
     contrib/systemd/Makefile
+    contrib/osmo-mgw.spec
     Makefile)

contrib/osmo-mgw.spec.in

@@ -0,0 +1,137 @@
+#
+# spec file for package osmo-mgw
+#
+# Copyright (c) 2017, Martin Hauke <mardnh@gmx.de>
+#
+# All modifications and additions to the file contributed by third parties
+# remain the property of their copyright owners, unless otherwise agreed
+# upon. The license for this file, and modifications and additions to the
+# file, is the same license as for the pristine package itself (unless the
+# license for the pristine package is not an Open Source License, in which
+# case the license is the MIT License). An "Open Source License" is a
+# license that conforms to the Open Source Definition (Version 1.9)
+# published by the Open Source Initiative.
+
+# Please submit bugfixes or comments via http://bugs.opensuse.org/
+#
+
+Name:           osmo-mgw
+Version:        @VERSION@
+Release:        0
+Summary:        Osmocom's Media Gateway for 2G and 3G circuit-switched mobile networks
+License:        AGPL-3.0-or-later AND GPL-2.0-or-later
+Group:          Hardware/Mobile
+URL:            https://osmocom.org/projects/osmo-mgw
+Source:         %{name}-%{version}.tar.xz
+BuildRequires:  automake >= 1.9
+BuildRequires:  libtool >= 2
+BuildRequires:  pkgconfig >= 0.20
+%if 0%{?suse_version}
+BuildRequires:  systemd-rpm-macros
+%endif
+BuildRequires:  pkgconfig(libosmo-netif) >= 0.6.0
+BuildRequires:  pkgconfig(libosmocore) >= 1.0.0
+BuildRequires:  pkgconfig(libosmoctrl) >= 1.1.0
+BuildRequires:  pkgconfig(libosmogsm) >= 1.0.0
+BuildRequires:  pkgconfig(libosmovty) >= 1.0.0
+BuildRequires:  pkgconfig(libosmocoding) >= 1.0.0
+BuildRequires:  pkgconfig(libosmoabis) >= 1.0.0
+BuildRequires:  pkgconfig(libosmotrau) >= 1.0.0
+%{?systemd_requires}
+
+%description
+OsmoMGW is Osmocom's Media Gateway for 2G and 3G circuit-switched mobile networks.
+
+%package -n libosmo-mgcp-client6
+Summary:        Osmocom's Media Gateway Control Protocol client library
+Group:          System/Libraries
+
+%description -n libosmo-mgcp-client6
+Osmocom's Media Gateway Control Protocol client library.
+
+%package -n libosmo-mgcp-client-devel
+Summary:        Development files for Osmocom's Media Gateway Control Protocol client library
+Group:          Development/Libraries/C and C++
+Requires:       libosmo-mgcp-client6 = %{version}
+
+%description -n libosmo-mgcp-client-devel
+Osmocom's Media Gateway Control Protocol client librarary.
+
+This subpackage contains libraries and header files for developing
+applications that want to make use of libosmo-mgcp-client.
+
+%package -n libosmo-mgcp-devel
+Summary:        Development files for Osmocom's Media Gateway server library
+Group:          Development/Libraries/C and C++
+
+%description -n libosmo-mgcp-devel
+Osmocom's Media Gateway Control Protocol server library.
+
+This subpackage contains libraries and header files for developing
+applications that want to make use of libosmo-mgcp.
+
+%prep
+%setup -q
+
+%build
+echo "%{version}" >.tarball-version
+autoreconf -fi
+%configure \
+  --disable-static \
+  --docdir=%{_docdir}/%{name} \
+  --with-systemdsystemunitdir=%{_unitdir}
+
+make %{?_smp_mflags}
+
+%install
+%make_install
+find %{buildroot} -type f -name "*.la" -delete -print
+
+%check
+make %{?_smp_mflags} check || (find . -name testsuite.log -exec cat {} +)
+
+%post   -n libosmo-mgcp-client6 -p /sbin/ldconfig
+%postun -n libosmo-mgcp-client6 -p /sbin/ldconfig
+
+%if 0%{?suse_version}
+%preun
+%service_del_preun osmo-mgw.service
+
+%postun
+%service_del_postun osmo-mgw.service
+
+%pre
+%service_add_pre osmo-mgw.service
+
+%post
+%service_add_post osmo-mgw.service
+%endif
+
+%files
+%license COPYING
+%doc AUTHORS README
+%dir %{_docdir}/%{name}/examples
+%dir %{_docdir}/%{name}/examples/osmo-mgw
+%{_docdir}/%{name}/examples/osmo-mgw/osmo-mgw.cfg
+%{_docdir}/%{name}/examples/osmo-mgw/osmo-mgw-abis_e1.cfg
+%{_bindir}/osmo-mgw
+%{_unitdir}/osmo-mgw.service
+%dir %{_sysconfdir}/osmocom
+%config(noreplace) %{_sysconfdir}/osmocom/osmo-mgw.cfg
+
+%files -n libosmo-mgcp-client6
+%{_libdir}/libosmo-mgcp-client.so.6*
+
+%files -n libosmo-mgcp-client-devel
+%{_libdir}/libosmo-mgcp-client.so
+%{_libdir}/pkgconfig/libosmo-mgcp-client.pc
+%dir %{_includedir}/osmocom
+%dir %{_includedir}/osmocom/mgcp_client
+%{_includedir}/osmocom/mgcp_client/*.h
+
+%files -n libosmo-mgcp-devel
+%dir %{_includedir}/osmocom
+%dir %{_includedir}/osmocom/mgcp
+%{_includedir}/osmocom/mgcp/*.h
+
+%changelog

contrib/simcom2rtp/Makefile

@@ -0,0 +1,11 @@
+CFLAGS:= -O2 -g -Wall $(shell pkg-config --cflags libosmocore libosmotrau)
+LIBS:= $(shell pkg-config --libs libosmocore libosmotrau)
+
+all: osmo-simcom2rtp
+
+osmo-simcom2rtp: g711.o g711_table.o simcom2rtp.o
+	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ -c $^
+

contrib/simcom2rtp/g711.c

@@ -0,0 +1,313 @@
+/*
+ * This source code is a product of Sun Microsystems, Inc. and is provided
+ * for unrestricted use.  Users may copy or modify this source code without
+ * charge.
+ *
+ * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING
+ * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun source code is provided with no support and without any obligation on
+ * the part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+/*
+ * December 30, 1994:
+ * Functions linear2alaw, linear2ulaw have been updated to correctly
+ * convert unquantized 16 bit values.
+ * Tables for direct u- to A-law and A- to u-law conversions have been
+ * corrected.
+ * Borge Lindberg, Center for PersonKommunikation, Aalborg University.
+ * bli@cpk.auc.dk
+ *
+ */
+/*
+ * Downloaded from comp.speech site in Cambridge.
+ *
+ */
+
+#include "g711.h"
+
+/*
+ * g711.c
+ *
+ * u-law, A-law and linear PCM conversions.
+ * Source: http://www.speech.kth.se/cost250/refsys/latest/src/g711.c
+ */
+#define	SIGN_BIT	(0x80)		/* Sign bit for a A-law byte. */
+#define	QUANT_MASK	(0xf)		/* Quantization field mask. */
+#define	NSEGS		(8)		/* Number of A-law segments. */
+#define	SEG_SHIFT	(4)		/* Left shift for segment number. */
+#define	SEG_MASK	(0x70)		/* Segment field mask. */
+
+static short seg_aend[8] = {0x1F, 0x3F, 0x7F, 0xFF,
+			    0x1FF, 0x3FF, 0x7FF, 0xFFF};
+static short seg_uend[8] = {0x3F, 0x7F, 0xFF, 0x1FF,
+			    0x3FF, 0x7FF, 0xFFF, 0x1FFF};
+
+/* copy from CCITT G.711 specifications */
+unsigned char _u2a[128] = {			/* u- to A-law conversions */
+	1,	1,	2,	2,	3,	3,	4,	4,
+	5,	5,	6,	6,	7,	7,	8,	8,
+	9,	10,	11,	12,	13,	14,	15,	16,
+	17,	18,	19,	20,	21,	22,	23,	24,
+	25,	27,	29,	31,	33,	34,	35,	36,
+	37,	38,	39,	40,	41,	42,	43,	44,
+	46,	48,	49,	50,	51,	52,	53,	54,
+	55,	56,	57,	58,	59,	60,	61,	62,
+	64,	65,	66,	67,	68,	69,	70,	71,
+	72,	73,	74,	75,	76,	77,	78,	79,
+/* corrected:
+	81,	82,	83,	84,	85,	86,	87,	88, 
+   should be: */
+	80,	82,	83,	84,	85,	86,	87,	88,
+	89,	90,	91,	92,	93,	94,	95,	96,
+	97,	98,	99,	100,	101,	102,	103,	104,
+	105,	106,	107,	108,	109,	110,	111,	112,
+	113,	114,	115,	116,	117,	118,	119,	120,
+	121,	122,	123,	124,	125,	126,	127,	128};
+
+unsigned char _a2u[128] = {			/* A- to u-law conversions */
+	1,	3,	5,	7,	9,	11,	13,	15,
+	16,	17,	18,	19,	20,	21,	22,	23,
+	24,	25,	26,	27,	28,	29,	30,	31,
+	32,	32,	33,	33,	34,	34,	35,	35,
+	36,	37,	38,	39,	40,	41,	42,	43,
+	44,	45,	46,	47,	48,	48,	49,	49,
+	50,	51,	52,	53,	54,	55,	56,	57,
+	58,	59,	60,	61,	62,	63,	64,	64,
+	65,	66,	67,	68,	69,	70,	71,	72,
+/* corrected:
+	73,	74,	75,	76,	77,	78,	79,	79,
+   should be: */
+	73,	74,	75,	76,	77,	78,	79,	80,
+	80,	81,	82,	83,	84,	85,	86,	87,
+	88,	89,	90,	91,	92,	93,	94,	95,
+	96,	97,	98,	99,	100,	101,	102,	103,
+	104,	105,	106,	107,	108,	109,	110,	111,
+	112,	113,	114,	115,	116,	117,	118,	119,
+	120,	121,	122,	123,	124,	125,	126,	127};
+
+static short search(
+   short val,
+   short *table,
+   short size)
+{
+   short i;
+   
+   for (i = 0; i < size; i++) {
+      if (val <= *table++)
+	 return (i);
+   }
+   return (size);
+}
+
+/*
+ * linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
+ *
+ * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
+ *
+ *		Linear Input Code	Compressed Code
+ *	------------------------	---------------
+ *	0000000wxyza			000wxyz
+ *	0000001wxyza			001wxyz
+ *	000001wxyzab			010wxyz
+ *	00001wxyzabc			011wxyz
+ *	0001wxyzabcd			100wxyz
+ *	001wxyzabcde			101wxyz
+ *	01wxyzabcdef			110wxyz
+ *	1wxyzabcdefg			111wxyz
+ *
+ * For further information see John C. Bellamy's Digital Telephony, 1982,
+ * John Wiley & Sons, pps 98-111 and 472-476.
+ */
+unsigned char
+linear2alaw(short pcm_val)	/* 2's complement (16-bit range) */
+{
+   short	 mask;
+   short	 seg;
+   unsigned char aval;
+   
+   pcm_val = pcm_val >> 3;
+
+   if (pcm_val >= 0) {
+      mask = 0xD5;		/* sign (7th) bit = 1 */
+   } else {
+      mask = 0x55;		/* sign bit = 0 */
+      pcm_val = -pcm_val - 1;
+   }
+   
+   /* Convert the scaled magnitude to segment number. */
+   seg = search(pcm_val, seg_aend, 8);
+   
+   /* Combine the sign, segment, and quantization bits. */
+   
+   if (seg >= 8)		/* out of range, return maximum value. */
+      return (unsigned char) (0x7F ^ mask);
+   else {
+      aval = (unsigned char) seg << SEG_SHIFT;
+      if (seg < 2)
+	 aval |= (pcm_val >> 1) & QUANT_MASK;
+      else
+	 aval |= (pcm_val >> seg) & QUANT_MASK;
+      return (aval ^ mask);
+   }
+}
+
+/*
+ * alaw2linear() - Convert an A-law value to 16-bit linear PCM
+ *
+ */
+short
+alaw2linear(
+   unsigned char	a_val)
+{
+   short t;
+   short seg;
+   
+   a_val ^= 0x55;
+   
+   t = (a_val & QUANT_MASK) << 4;
+   seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
+   switch (seg) {
+   case 0:
+      t += 8;
+      break;
+   case 1:
+      t += 0x108;
+      break;
+   default:
+      t += 0x108;
+      t <<= seg - 1;
+   }
+   return ((a_val & SIGN_BIT) ? t : -t);
+}
+
+#define	BIAS		(0x84)		/* Bias for linear code. */
+#define CLIP            8159
+
+/*
+* linear2ulaw() - Convert a linear PCM value to u-law
+*
+* In order to simplify the encoding process, the original linear magnitude
+* is biased by adding 33 which shifts the encoding range from (0 - 8158) to
+* (33 - 8191). The result can be seen in the following encoding table:
+*
+*	Biased Linear Input Code	Compressed Code
+*	------------------------	---------------
+*	00000001wxyza			000wxyz
+*	0000001wxyzab			001wxyz
+*	000001wxyzabc			010wxyz
+*	00001wxyzabcd			011wxyz
+*	0001wxyzabcde			100wxyz
+*	001wxyzabcdef			101wxyz
+*	01wxyzabcdefg			110wxyz
+*	1wxyzabcdefgh			111wxyz
+*
+* Each biased linear code has a leading 1 which identifies the segment
+* number. The value of the segment number is equal to 7 minus the number
+* of leading 0's. The quantization interval is directly available as the
+* four bits wxyz.  * The trailing bits (a - h) are ignored.
+*
+* Ordinarily the complement of the resulting code word is used for
+* transmission, and so the code word is complemented before it is returned.
+*
+* For further information see John C. Bellamy's Digital Telephony, 1982,
+* John Wiley & Sons, pps 98-111 and 472-476.
+*/
+unsigned char
+linear2ulaw(
+   short pcm_val)	/* 2's complement (16-bit range) */
+{
+   short         mask;
+   short	 seg;
+   unsigned char uval;
+   
+   /* Get the sign and the magnitude of the value. */
+   pcm_val = pcm_val >> 2;
+   if (pcm_val < 0) {
+      pcm_val = -pcm_val;
+      mask = 0x7F;
+   } else {
+      mask = 0xFF;
+   }
+   if ( pcm_val > CLIP ) pcm_val = CLIP;		/* clip the magnitude */
+   pcm_val += (BIAS >> 2);
+   
+   /* Convert the scaled magnitude to segment number. */
+   seg = search(pcm_val, seg_uend, 8);
+   
+   /*
+   * Combine the sign, segment, quantization bits;
+   * and complement the code word.
+   */
+   if (seg >= 8)		/* out of range, return maximum value. */
+      return (unsigned char) (0x7F ^ mask);
+   else {
+      uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF);
+      return (uval ^ mask);
+   }
+   
+}
+
+/*
+ * ulaw2linear() - Convert a u-law value to 16-bit linear PCM
+ *
+ * First, a biased linear code is derived from the code word. An unbiased
+ * output can then be obtained by subtracting 33 from the biased code.
+ *
+ * Note that this function expects to be passed the complement of the
+ * original code word. This is in keeping with ISDN conventions.
+ */
+short
+ulaw2linear(
+   unsigned char	u_val)
+{
+   short t;
+   
+   /* Complement to obtain normal u-law value. */
+   u_val = ~u_val;
+   
+   /*
+    * Extract and bias the quantization bits. Then
+    * shift up by the segment number and subtract out the bias.
+    */
+   t = ((u_val & QUANT_MASK) << 3) + BIAS;
+   t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
+   
+   return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
+}
+
+/* A-law to u-law conversion */
+unsigned char
+alaw2ulaw(
+   unsigned char	aval)
+{
+   aval &= 0xff;
+   return (unsigned char) ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
+	   (0x7F ^ _a2u[aval ^ 0x55]));
+}
+
+/* u-law to A-law conversion */
+unsigned char
+ulaw2alaw(
+   unsigned char	uval)
+{
+   uval &= 0xff;
+   return (unsigned char) ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
+			   (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
+}
+
+/* ---------- end of g711.c ----------------------------------------------------- */

contrib/simcom2rtp/g711.h

@@ -0,0 +1,27 @@
+/*
+ * g711.h
+ *
+ * u-law, A-law and linear PCM conversions.
+ * Source: http://www.speech.kth.se/cost250/refsys/latest/src/g711.h
+ */
+
+#ifndef _G711_H_
+#define _G711_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+unsigned char	linear2alaw(short pcm_val);
+short		    alaw2linear(unsigned char a_val);
+unsigned char	linear2ulaw(short pcm_val);
+short		    ulaw2linear(unsigned char u_val);
+unsigned char	alaw2ulaw(unsigned char aval);
+unsigned char	ulaw2alaw(unsigned char uval);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _G711_H_ */

contrib/simcom2rtp/g711_table.c

@@ -0,0 +1,102 @@
+#ifndef G711_TABLE_H
+#define G711_TABLE_H
+
+#include "g711.h"
+
+/* 16384 entries per table (16 bit) */
+unsigned char linear_to_alaw[65536];
+unsigned char linear_to_ulaw[65536];
+
+/* 16384 entries per table (8 bit) */
+unsigned short alaw_to_linear[256];
+unsigned short ulaw_to_linear[256];
+
+static void build_linear_to_xlaw_table(unsigned char *linear_to_xlaw,
+                                       unsigned char (*linear2xlaw)(short))
+{
+    int i;
+
+    for (i=0; i<65536;i++){
+        linear_to_xlaw[i] = linear2xlaw((short) i);
+    }
+}
+
+static void build_xlaw_to_linear_table(unsigned short *xlaw_to_linear,
+                                       short (*xlaw2linear)(unsigned char))
+{
+    int i;
+
+    for (i=0; i<256;i++){
+        xlaw_to_linear[i] = (unsigned short) xlaw2linear(i);
+    }
+}
+
+static void pcm16_to_xlaw(unsigned char *linear_to_xlaw, int src_length, const char *src_samples, char *dst_samples)
+{
+    int i;
+    const unsigned short *s_samples;
+
+    s_samples = (const unsigned short *)src_samples;
+
+    for (i=0; i < src_length / 2; i++)
+    {
+        dst_samples[i] = linear_to_xlaw[s_samples[i]];
+    }
+}
+
+static void xlaw_to_pcm16(unsigned short *xlaw_to_linear, int src_length, const char *src_samples, char *dst_samples)
+{
+    int i;
+    unsigned char *s_samples;
+    unsigned short *d_samples;
+
+    s_samples = (unsigned char *) src_samples;
+    d_samples = (unsigned short *)dst_samples;
+
+    for (i=0; i < src_length; i++)
+    {
+        d_samples[i] = xlaw_to_linear[s_samples[i]];
+    }
+}
+
+void pcm16_to_alaw(int src_length, const char *src_samples, char *dst_samples)
+{
+    pcm16_to_xlaw(linear_to_alaw, src_length, src_samples, dst_samples);
+}
+
+void pcm16_to_ulaw(int src_length, const char *src_samples, char *dst_samples)
+{
+    pcm16_to_xlaw(linear_to_ulaw, src_length, src_samples, dst_samples);
+}
+
+void alaw_to_pcm16(int src_length, const char *src_samples, char *dst_samples)
+{
+    xlaw_to_pcm16(alaw_to_linear, src_length, src_samples, dst_samples);
+}
+
+void ulaw_to_pcm16(int src_length, const char *src_samples, char *dst_samples)
+{
+    xlaw_to_pcm16(ulaw_to_linear, src_length, src_samples, dst_samples);
+}
+
+void pcm16_alaw_tableinit()
+{
+    build_linear_to_xlaw_table(linear_to_alaw, linear2alaw);
+}
+
+void pcm16_ulaw_tableinit()
+{
+    build_linear_to_xlaw_table(linear_to_ulaw, linear2ulaw);
+}
+
+void alaw_pcm16_tableinit()
+{
+    build_xlaw_to_linear_table(alaw_to_linear, alaw2linear);
+}
+
+void ulaw_pcm16_tableinit()
+{
+    build_xlaw_to_linear_table(ulaw_to_linear, ulaw2linear);
+}
+
+#endif // G711_TABLE_H

contrib/simcom2rtp/g711_table.h

@@ -0,0 +1,14 @@
+#ifndef G711_TABLE_H
+#define G711_TABLE_H
+
+void pcm16_to_alaw(int length, const char *src_samples, char *dst_samples);
+void pcm16_to_ulaw(int length, const char *src_samples, char *dst_samples);
+void alaw_to_pcm16(int length, const char *src_samples, char *dst_samples);
+void ulaw_to_pcm16(int length, const char *src_samples, char *dst_samples);
+
+void pcm16_alaw_tableinit();
+void pcm16_ulaw_tableinit();
+void alaw_pcm16_tableinit();
+void ulaw_pcm16_tableinit();
+
+#endif // G711_TABLE_H

contrib/simcom2rtp/simcom2rtp.c

@@ -0,0 +1,218 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+
+#include <osmocom/core/select.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+#include <osmocom/core/serial.h>
+
+#include <osmocom/trau/osmo_ortp.h>
+
+#include "g711.h"
+
+#define RTP_PT_PCMU	0
+#define RTP_PT_PCMA	8
+
+struct modem_state {
+	struct osmo_fd data_fd;
+	struct osmo_rtp_socket *rtp;
+	/* queue of linear PCM audio in RTP -> modem direction */
+	struct llist_head rtp2modem;
+	/* message buffer used if samples insufficient for next RTP frame were received */
+	struct msgb *modem2rtp;
+};
+
+static void *g_tall_ctx;
+
+
+/* call-back on received RTP data */
+static void ortp_rx_cb(struct osmo_rtp_socket *rs, const uint8_t *payload,
+			unsigned int payload_len, uint16_t seq_nr, uint32_t timestamp, bool marker)
+{
+	/* we received a RTP frame */
+	struct modem_state *ms = rs->priv;
+	struct msgb *msg = msgb_alloc(payload_len*2, "RTP Rx");
+	unsigned int i;
+	int16_t *out;
+
+	OSMO_ASSERT(msg);
+
+	out = (int16_t *) msgb_put(msg, payload_len*2);
+
+	if (payload_len != 160) {
+		fprintf(stderr, "RTP payload length %d != 160, dropping\n", payload_len);
+		msgb_free(msg);
+		return;
+	}
+
+	/* convert from Alaw to linear PCM (160 -> 320 bytes) */
+	for (i = 0; i < payload_len; i++)
+		out[i] = alaw2linear(payload[i]);
+
+	/* append to the write queue */
+	msgb_enqueue(&ms->rtp2modem, msg);
+	ms->data_fd.when |= OSMO_FD_WRITE;
+}
+
+static void modem2rtp(struct modem_state *ms, const uint8_t *data, unsigned int len)
+{
+	const int16_t *data16 = (const int16_t *)data;
+	unsigned int samples = len / 2;
+	unsigned int offset = 0;
+	unsigned int i;
+
+	/* samples are always 16bit, we cannot read half a sample */
+	OSMO_ASSERT((len & 1) == 0);
+
+	/* first complete any pending incomplete RTP frame */
+	if (ms->modem2rtp) {
+		struct msgb *msg = ms->modem2rtp;
+		unsigned int missing_samples = 160 - msgb_length(msg);
+		for (i = 0; i < missing_samples; i++) {
+			if (i >= samples)
+				break;
+			msgb_put_u8(msg, linear2alaw(data16[i]));
+		}
+		offset = i;
+		if (msgb_length(msg) == 160) {
+			osmo_rtp_send_frame_ext(ms->rtp, msgb_data(msg), msgb_length(msg), 160, false);
+			msgb_free(msg);
+		}
+	}
+
+	/* then send as many RTP frames as we have samples */
+	for (offset = offset; offset + 160 <= samples; offset += 160) {
+		uint8_t buf[160];
+		for (i = 0; i < sizeof(buf); i++)
+			buf[i] = linear2alaw(data16[offset + i]);
+		osmo_rtp_send_frame_ext(ms->rtp, buf, sizeof(buf), 160, false);
+	}
+
+	/* store remainder in msgb */
+	if (offset < samples) {
+		struct msgb *msg = msgb_alloc_c(ms, 160, "modem2rtp");
+		OSMO_ASSERT(msg);
+		OSMO_ASSERT(len - offset < 160);
+		for (i = 0; i < len - offset; i++)
+			msgb_put_u8(msg, linear2alaw(data16[offset + i]));
+		ms->modem2rtp = msg;
+	}
+}
+
+
+/* call back on file descriptor events of the modem DATA ttyUSB device */
+static int modem_data_fd_cb(struct osmo_fd *ofd, unsigned int what)
+{
+	struct modem_state *ms = ofd->data;
+	int rc;
+
+	if (what & OSMO_FD_READ) {
+		/* SIM5360 USB AUDIO Application Note v1.01 states 1600 bytes every 100ms */
+		uint8_t rx_buf[1600];
+		rc = read(ofd->fd, rx_buf, sizeof(rx_buf));
+		OSMO_ASSERT(rc > 0);
+		modem2rtp(ms, rx_buf, rc);
+	}
+
+	if (what & OSMO_FD_WRITE) {
+		struct msgb *msg = msgb_dequeue(&ms->rtp2modem);
+		if (!msg)
+			ofd->when &= ~OSMO_FD_WRITE;
+		else {
+			/* SIM5300 USB AUDIO Application Note v1.01 states 640 bytes every 40ms;
+			 * we simply write every RTP frame individually (320 bytes every 20ms) */
+			rc = write(ofd->fd, msgb_data(msg), msgb_length(msg));
+			if (rc != msgb_length(msg))
+				fprintf(stderr, "Short write: %d < %u\n", rc, msgb_length(msg));
+			msgb_free(msg);
+		}
+	}
+
+	return 0;
+}
+
+
+static int modem_data_open(struct modem_state *ms, const char *basepath)
+{
+	char fname[PATH_MAX+1];
+	int fd;
+
+	/* the assumption is that the caller provides something like
+	 * "/dev/serial/by-path/pci-0000:00:14.0-usb-0:2:1" */
+	snprintf(fname, sizeof(fname), "%s.0-port0", basepath);
+
+	fd = osmo_serial_init(fname, 921600);
+	if (fd < 0) {
+		fprintf(stderr, "failed to open device '%s': %s\n", fname, strerror(errno));
+		return -1;
+	}
+	osmo_fd_setup(&ms->data_fd, fd, OSMO_FD_READ, modem_data_fd_cb, ms, 0);
+	osmo_fd_register(&ms->data_fd);
+
+	return 0;
+}
+
+static struct modem_state *modem_create(void *ctx)
+{
+	struct modem_state *ms = talloc_zero(ctx, struct modem_state);
+	int rc;
+
+	INIT_LLIST_HEAD(&ms->rtp2modem);
+
+	ms->rtp = osmo_rtp_socket_create(ms, 0);
+	OSMO_ASSERT(ms->rtp);
+	osmo_rtp_socket_set_pt(ms->rtp, RTP_PT_PCMA);
+	ms->rtp->priv = ms;
+	ms->rtp->rx_cb = ortp_rx_cb;
+
+	rc = osmo_rtp_socket_bind(ms->rtp, "0.0.0.0", 1111);
+	OSMO_ASSERT(rc == 0);
+
+	rc = osmo_rtp_socket_connect(ms->rtp, "127.0.0.1", 2222);
+	//rc = osmo_rtp_socket_autoconnect(ms->rtp);
+	OSMO_ASSERT(rc == 0);
+
+	osmo_rtp_set_source_desc(ms->rtp, "cname", "simcom2rtp", NULL, NULL, NULL,
+				 "osmo-simcom2rtp", NULL);
+
+	return ms;
+}
+
+
+
+
+int main(int argc, char **argv)
+{
+
+	talloc_enable_null_tracking();
+	g_tall_ctx = talloc_named_const(NULL, 1, "simcom2rtp");
+
+	msgb_talloc_ctx_init(g_tall_ctx, 0);
+	osmo_init_logging2(g_tall_ctx, NULL);
+	osmo_fsm_log_timeouts(true);
+	osmo_fsm_log_addr(true);
+	//osmo_stats_init(g_tall_ctx);
+	osmo_rtp_init(g_tall_ctx);
+
+	struct modem_state *ms = modem_create(g_tall_ctx);
+	int rc;
+
+	OSMO_ASSERT(ms);
+	rc = modem_data_open(ms, "/dev/serial/by-path/pci-0000:00:14.0-usb-0:2:1");
+	OSMO_ASSERT(rc == 0);
+
+	while (1) {
+		osmo_select_main(0);
+	}
+
+}

debian/changelog

@@ -1,3 +1,45 @@
+osmo-mgw (1.7.0) unstable; urgency=medium
+
+  [ Neels Hofmeyr ]
+  * rename codecs_cmp() to codecs_same()
+  * mgcp_codec: constify 'param' arg
+  * fix crashes: don't assert on incoming RTP packet size
+  * mgcp_send(): stop looping on conversion error
+  * mgcp_codec: split codec_free() off of codec_init()
+  * fix memleak: actually free strings in mgcp_codec_reset_all()
+  * mgcp_test: extend / rewrite test_mgcp_codec_pt_translate()
+  * test_mgcp_codec_pt_translate(): more tests
+  * differentiate AMR octet-aligned=0 vs =1
+  * ptmap: implicitly match  '/8000' and '/8000/1'
+  * mgcp_codec: codec_set(): log about all possible errors
+  * mgcp_codec_add: fix audio_name size check
+  * explicitly free codecs in mgcp_rtp_conn_cleanup()
+  * tweak mgcp_parse_audio_ptime_rtpmap()
+  * SDP: store all ptmap entries
+  * mgcp_client_fsm cleanup: Do not assert on DLCX failure
+  * clear pending requests on MGCP failure
+  * client: endp fsm: add notify struct, prep for cancel-notify
+  * client: endp fsm: clear ci[] before dispatching DLCX success
+  * client: endp fsm: allow cancelling a notify event
+  * client: endp fsm: add osmo_mgcpc_ep_ci_ep()
+  * accept MGCP without SDP
+  * fix use-after-free: require new fsm deferred dealloc, check for term
+
+  [ Pau Espin Pedrol ]
+  * mgcp_test: Correctly release all endpoints allocated
+  * mgw: Allocate mgcp_conn instance under tcfg->endpoints
+
+  [ Harald Welte ]
+  * manual: Fix copy+paste error
+  * mgcp_client: Check for osmo_fsm_register() error return value
+  * Move fsm_mgcp_client regstration to __attribute__((contructor))
+  * exit(2) on unsupported positional arguments on command line
+
+  [ Oliver Smith ]
+  * osmoappdesc.py: switch to python 3
+
+ -- Pau Espin Pedrol <pespin@sysmocom.de>  Fri, 03 Jan 2020 13:35:09 +0100
+
 osmo-mgw (1.6.0) unstable; urgency=medium
 
   [ Oliver Smith ]

debian/control

@@ -1,13 +1,14 @@
 Source: osmo-mgw
 Section: net
 Priority: extra
-Maintainer: Alexander Couzens <lynxis@fe80.eu>
+Maintainer: Osmocom team <openbsc@lists.osmocom.org>
 Build-Depends: debhelper (>=9),
                dh-autoreconf,
                pkg-config,
                autotools-dev,
-               libosmocore-dev,
+               libosmocore-dev (>= 1.4.0),
                libosmo-netif-dev,
+               libosmo-abis-dev,
                osmo-gsm-manuals-dev
 Standards-Version: 3.9.8
 Vcs-Git: git://git.osmocom.org/osmo-mgw.git

debian/osmo-mgw.install

@@ -2,3 +2,4 @@ etc/osmocom/osmo-mgw.cfg
 lib/systemd/system/osmo-mgw.service
 usr/bin/osmo-mgw
 usr/share/doc/osmo-mgw/examples/osmo-mgw/osmo-mgw.cfg
+usr/share/doc/osmo-mgw/examples/osmo-mgw/osmo-mgw-abis_e1.cfg

doc/examples/osmo-mgw/osmo-mgw-abis_e1.cfg

@@ -0,0 +1,25 @@
+!
+! MGCP configuration example
+!
+e1_input
+ e1_line 0 driver dahdi
+ e1_line 0 port 0
+mgcp
+  bind ip 127.0.0.1
+  rtp port-range 4002 16000
+  rtp bind-ip 127.0.0.1
+  rtp ip-probing
+  rtp ip-tos 184
+  bind port 2427
+  sdp audio payload number 98
+  sdp audio payload name GSM
+  number endpoints 31
+  loop 0
+  force-realloc 1
+  rtcp-omit
+  rtp-patch ssrc
+  rtp-patch timestamp
+  trunk 1
+   rtp keep-alive once
+   no rtp keep-alive
+   line 0

doc/examples/osmo-mgw/osmo-mgw.cfg

@@ -4,7 +4,7 @@
 mgcp
   bind ip 127.0.0.1
   rtp port-range 4002 16000
-  rtp bind-ip 10.9.1.122
+  rtp bind-ip 127.0.0.1
   rtp ip-probing
   rtp ip-tos 184
   bind port 2427

doc/manuals/Makefile.am

@@ -13,6 +13,11 @@ if BUILD_MANUALS
   VTY_REFERENCE = osmomgw-vty-reference.xml
   include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.vty-reference.inc
 
+  BUILT_REFERENCE_XML = $(builddir)/vty/mgw_vty_reference.xml
+  $(builddir)/vty/mgw_vty_reference.xml: $(top_builddir)/src/osmo-mgw/osmo-mgw
+	mkdir -p $(builddir)/vty
+	$(top_builddir)/src/osmo-mgw/osmo-mgw --vty-ref-xml > $@
+
   OSMO_REPOSITORY = osmo-mgw
   include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.common.inc
 endif

doc/manuals/osmomgw-usermanual.adoc

@@ -24,6 +24,8 @@ include::./common/chapters/osmux/osmux.adoc[]
 
 //include::{srcdir}/chapters/counters.adoc[]
 
+include::./common/chapters/vty_cpu_sched.adoc[]
+
 include::./common/chapters/port_numbers.adoc[]
 
 include::./common/chapters/bibliography.adoc[]

include/Makefile.am

@@ -8,7 +8,6 @@ nobase_include_HEADERS = \
 	osmocom/mgcp_client/mgcp_client_fsm.h \
 	osmocom/mgcp/mgcp.h \
 	osmocom/mgcp/mgcp_common.h \
-	osmocom/mgcp/mgcp_internal.h \
 	osmocom/mgcp/osmux.h \
 	$(NULL)
 

include/osmocom/mgcp/Makefile.am

@@ -6,5 +6,11 @@ noinst_HEADERS = \
 	mgcp_endp.h \
 	mgcp_sdp.h \
 	mgcp_codec.h \
+	mgcp_ctrl.h \
+	mgcp_trunk.h \
 	debug.h \
+	mgcp_ratectr.h \
+	mgcp_e1.h \
+	mgcp_network.h \
+	mgcp_protocol.h \
 	$(NULL)

include/osmocom/mgcp/debug.h

@@ -29,6 +29,7 @@
 /* Debug Areas of the code */
 enum {
 	DRTP,
+	DE1,
 	Debug_LastEntry,
 };
 

include/osmocom/mgcp/mgcp.h

@@ -23,6 +23,7 @@
 #pragma once
 
 #include <osmocom/core/msgb.h>
+#include <osmocom/core/socket.h>
 #include <osmocom/core/write_queue.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/logging.h>
@@ -34,6 +35,8 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 
+#include "mgcp_ratectr.h"
+
 #define RTP_PORT_DEFAULT_RANGE_START 16002
 #define RTP_PORT_DEFAULT_RANGE_END RTP_PORT_DEFAULT_RANGE_START + 64
 
@@ -42,7 +45,7 @@
  */
 struct mgcp_endpoint;
 struct mgcp_config;
-struct mgcp_trunk_config;
+struct mgcp_trunk;
 struct mgcp_rtp_end;
 
 #define MGCP_ENDP_CRCX 1
@@ -59,10 +62,9 @@ struct mgcp_rtp_end;
 #define MGCP_POLICY_REJECT	5
 #define MGCP_POLICY_DEFER	6
 
-typedef int (*mgcp_realloc)(struct mgcp_trunk_config *cfg, int endpoint);
-typedef int (*mgcp_change)(struct mgcp_trunk_config *cfg, int endpoint, int state);
-typedef int (*mgcp_policy)(struct mgcp_trunk_config *cfg, int endpoint, int state, const char *transactio_id);
-typedef int (*mgcp_reset)(struct mgcp_trunk_config *cfg);
+typedef int (*mgcp_change)(struct mgcp_endpoint *endp, int state);
+typedef int (*mgcp_policy)(struct mgcp_endpoint *endp, int state, const char *transaction_id);
+typedef int (*mgcp_reset)(struct mgcp_trunk *cfg);
 typedef int (*mgcp_rqnt)(struct mgcp_endpoint *endp, char tone);
 
 /**
@@ -93,7 +95,8 @@ typedef void (*mgcp_get_format)(struct mgcp_endpoint *endp,
  */
 struct mgcp_port_range {
 	/* addr or NULL to fall-back to default */
-	char *bind_addr;
+	char *bind_addr_v4;
+	char *bind_addr_v6;
 
 	/* dynamically allocated */
 	int range_start;
@@ -119,104 +122,6 @@ struct mgcp_port_range {
 #define MGCP_KEEPALIVE_ONCE (-1)
 #define MGCP_KEEPALIVE_NEVER 0
 
-/* Global MCGP CRCX related rate counters */
-enum {
-	MGCP_CRCX_SUCCESS,
-	MGCP_CRCX_FAIL_BAD_ACTION,
-	MGCP_CRCX_FAIL_UNHANDLED_PARAM,
-	MGCP_CRCX_FAIL_MISSING_CALLID,
-	MGCP_CRCX_FAIL_INVALID_MODE,
-	MGCP_CRCX_FAIL_LIMIT_EXCEEDED,
-	MGCP_CRCX_FAIL_UNKNOWN_CALLID,
-	MGCP_CRCX_FAIL_ALLOC_CONN,
-	MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC,
-	MGCP_CRCX_FAIL_START_RTP,
-	MGCP_CRCX_FAIL_REJECTED_BY_POLICY,
-	MGCP_CRCX_FAIL_NO_OSMUX,
-	MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS,
-	MGCP_CRCX_FAIL_CODEC_NEGOTIATION,
-	MGCP_CRCX_FAIL_BIND_PORT,
-};
-
-/* Global MCGP MDCX related rate counters */
-enum {
-	MGCP_MDCX_SUCCESS,
-	MGCP_MDCX_FAIL_WILDCARD,
-	MGCP_MDCX_FAIL_NO_CONN,
-	MGCP_MDCX_FAIL_INVALID_CALLID,
-	MGCP_MDCX_FAIL_INVALID_CONNID,
-	MGCP_MDCX_FAIL_UNHANDLED_PARAM,
-	MGCP_MDCX_FAIL_NO_CONNID,
-	MGCP_MDCX_FAIL_CONN_NOT_FOUND,
-	MGCP_MDCX_FAIL_INVALID_MODE,
-	MGCP_MDCX_FAIL_INVALID_CONN_OPTIONS,
-	MGCP_MDCX_FAIL_NO_REMOTE_CONN_DESC,
-	MGCP_MDCX_FAIL_START_RTP,
-	MGCP_MDCX_FAIL_REJECTED_BY_POLICY,
-	MGCP_MDCX_DEFERRED_BY_POLICY
-};
-
-/* Global MCGP DLCX related rate counters */
-enum {
-	MGCP_DLCX_SUCCESS,
-	MGCP_DLCX_FAIL_WILDCARD,
-	MGCP_DLCX_FAIL_NO_CONN,
-	MGCP_DLCX_FAIL_INVALID_CALLID,
-	MGCP_DLCX_FAIL_INVALID_CONNID,
-	MGCP_DLCX_FAIL_UNHANDLED_PARAM,
-	MGCP_DLCX_FAIL_REJECTED_BY_POLICY,
-	MGCP_DLCX_DEFERRED_BY_POLICY,
-};
-
-struct mgcp_trunk_config {
-	struct llist_head entry;
-
-	struct mgcp_config *cfg;
-
-	int trunk_nr;
-	int trunk_type;
-
-	char *audio_fmtp_extra;
-	char *audio_name;
-	int audio_payload;
-	int audio_send_ptime;
-	int audio_send_name;
-	int audio_loop;
-
-	int no_audio_transcoding;
-
-	int omit_rtcp;
-	int keepalive_interval;
-
-	/* RTP patching */
-	int force_constant_ssrc; /* 0: don't, 1: once */
-	int force_aligned_timing;
-	bool rfc5993_hr_convert;
-
-	/* spec handling */
-	int force_realloc;
-
-	/* timer */
-	struct osmo_timer_list keepalive_timer;
-
-	/* When set, incoming RTP packets are not filtered
-	 * when ports and ip-address do not match (debug) */
-	int rtp_accept_all;
-
-	unsigned int number_endpoints;
-	int vty_number_endpoints;
-	struct mgcp_endpoint *endpoints;
-
-	/* Rate counter group which contains stats for processed CRCX commands. */
-	struct rate_ctr_group *mgcp_crcx_ctr_group;
-	/* Rate counter group which contains stats for processed MDCX commands. */
-	struct rate_ctr_group *mgcp_mdcx_ctr_group;
-	/* Rate counter group which contains stats for processed DLCX commands. */
-	struct rate_ctr_group *mgcp_dlcx_ctr_group;
-	/* Rate counter group which aggregates stats of individual RTP connections. */
-	struct rate_ctr_group *all_rtp_conn_stats;
-};
-
 enum mgcp_role {
 	MGCP_BSC = 0,
 	MGCP_BSC_NAT,
@@ -244,14 +149,12 @@ struct mgcp_config {
 	mgcp_change change_cb;
 	mgcp_policy policy_cb;
 	mgcp_reset reset_cb;
-	mgcp_realloc realloc_cb;
 	mgcp_rqnt rqnt_cb;
 	void *data;
 
 	uint32_t last_call_id;
 
-	/* trunk handling */
-	struct mgcp_trunk_config trunk;
+	/* list holding the trunks */
 	struct llist_head trunks;
 
 	enum mgcp_role role;
@@ -279,6 +182,13 @@ struct mgcp_config {
 
 	/* time after which inactive connections (CIs) get closed */
 	int conn_timeout;
+
+	/* osmocom CTRL interface */
+	struct ctrl_handle *ctrl;
+
+	/* global rate counters to measure the MGWs overall performance and
+	 * health */
+	struct mgcp_ratectr_global ratectr;
 };
 
 /* config management */
@@ -286,8 +196,7 @@ struct mgcp_config *mgcp_config_alloc(void);
 int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg,
 		      enum mgcp_role role);
 int mgcp_vty_init(void);
-int mgcp_endpoints_allocate(struct mgcp_trunk_config *cfg);
-void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval);
+void mgcp_trunk_set_keepalive(struct mgcp_trunk *trunk, int interval);
 
 /*
  * format helper functions
@@ -295,9 +204,9 @@ void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval);
 struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg);
 
 
-int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint);
+int mgcp_send_reset_ep(struct mgcp_endpoint *endp);
 int mgcp_send_reset_all(struct mgcp_config *cfg);
 
 
 int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, int port);
-int mgcp_udp_send(int fd, struct in_addr *addr, int port, char *buf, int len);
+int mgcp_udp_send(int fd, struct osmo_sockaddr *addr, int port, char *buf, int len);

include/osmocom/mgcp/mgcp_codec.h

@@ -1,7 +1,19 @@
 #pragma once
 
+#define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20
+#define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000
+#define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20
+#define DEFAULT_RTP_AUDIO_DEFAULT_RATE  8000
+#define DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS 1
+
+#define PTYPE_UNDEFINED (-1)
+
+struct mgcp_conn_rtp;
+
 void mgcp_codec_summary(struct mgcp_conn_rtp *conn);
 void mgcp_codec_reset_all(struct mgcp_conn_rtp *conn);
 int mgcp_codec_add(struct mgcp_conn_rtp *conn, int payload_type, const char *audio_name, const struct mgcp_codec_param *param);
 int mgcp_codec_decide(struct mgcp_conn_rtp *conn);
 int mgcp_codec_pt_translate(struct mgcp_conn_rtp *conn_src, struct mgcp_conn_rtp *conn_dst, int payload_type);
+const struct mgcp_rtp_codec *mgcp_codec_pt_find_by_subtype_name(struct mgcp_conn_rtp *conn,
+								const char *subtype_name, unsigned int match_nr);

include/osmocom/mgcp/mgcp_common.h

@@ -100,6 +100,10 @@ static inline int mgcp_msg_terminate_nul(struct msgb *msg)
 /* A prefix to denote the virtual trunk (RTP on both ends) */
 #define MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK "rtpbridge/"
 
+/* A prefix to denote the e1 trunk
+ * (see also RFC3435 section E.2) */
+#define MGCP_ENDPOINT_PREFIX_E1_TRUNK "ds/e1-"
+
 /* Maximal number of payload types / codecs that can be negotiated via SDP at
  * at once. */
 #define MGCP_MAX_CODECS 10

include/osmocom/mgcp/mgcp_conn.h

@@ -23,11 +23,114 @@
 
 #pragma once
 
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/mgcp_network.h>
+#include <osmocom/mgcp/osmux.h>
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/rate_ctr.h>
 #include <inttypes.h>
 
+#define LOGPCONN(conn, cat, level, fmt, args...) \
+LOGPENDP((conn)->endp, cat, level, "CI:%s " fmt, \
+         (conn)->id, \
+         ## args)
+
+#define LOG_CONN(conn, level, fmt, args...) \
+	LOGP(DRTP, level, "(%s I:%s) " fmt, \
+	     (conn)->endp ? (conn)->endp->name : "none", (conn)->id, ## args)
+
+#define LOG_CONN_RTP(conn_rtp, level, fmt, args...) \
+	LOG_CONN((conn_rtp)->conn, level, fmt, ## args)
+
+/* Specific rtp connection type (see struct mgcp_conn_rtp) */
+enum mgcp_conn_rtp_type {
+	MGCP_RTP_DEFAULT	= 0,
+	MGCP_OSMUX_BSC,
+	MGCP_OSMUX_BSC_NAT,
+};
+
+/*! Connection type, specifies which member of the union "u" in mgcp_conn
+ *  contains a useful connection description (currently only RTP) */
+enum mgcp_conn_type {
+	MGCP_CONN_TYPE_RTP,
+};
+
+/* MGCP connection (RTP) */
+struct mgcp_conn_rtp {
+
+	/* Backpointer to conn struct */
+	struct mgcp_conn *conn;
+
+	/* Specific connection type */
+	enum mgcp_conn_rtp_type type;
+
+	/* Port status */
+	struct mgcp_rtp_end end;
+
+	/* Sequence bits */
+	struct mgcp_rtp_state state;
+
+	/* taps for the rtp connection; one per direction */
+	struct mgcp_rtp_tap tap_in;
+	struct mgcp_rtp_tap tap_out;
+
+	/* Osmux states (optional) */
+	struct {
+		/* Osmux state: disabled, activating, active */
+		enum osmux_state state;
+		/* Is cid holding valid data? is it allocated from pool? */
+		bool cid_allocated;
+		/* Allocated Osmux circuit ID for this conn */
+		uint8_t cid;
+		/* handle to batch messages */
+		struct osmux_in_handle *in;
+		/* handle to unbatch messages */
+		struct osmux_out_handle out;
+		/* statistics */
+		struct {
+			uint32_t chunks;
+			uint32_t octets;
+		} stats;
+	} osmux;
+
+	struct rate_ctr_group *rate_ctr_group;
+};
+
+/*! MGCP connection (untyped) */
+struct mgcp_conn {
+	/*! list head */
+	struct llist_head entry;
+
+	/*! Backpointer to the endpoint where the conn belongs to */
+	struct mgcp_endpoint *endp;
+
+	/*! type of the connection (union) */
+	enum mgcp_conn_type type;
+
+	/*! mode of the connection */
+	enum mgcp_connection_mode mode;
+
+	/*! copy of the mode to restore the original setting (VTY) */
+	enum mgcp_connection_mode mode_orig;
+
+	/*! connection id to identify the connection */
+	char id[MGCP_CONN_ID_MAXLEN];
+
+	/*! human readable name (vty, logging) */
+	char name[256];
+
+	/*! activity tracker (for cleaning up inactive connections) */
+	struct osmo_timer_list watchdog;
+
+	/*! union with connection description */
+	union {
+		struct mgcp_conn_rtp rtp;
+	} u;
+
+	/*! pointer to optional private data */
+	void *priv;
+};
+
 /* RTP connection related counters */
 enum {
 	IN_STREAM_ERR_TSTMP_CTR,
@@ -68,6 +171,11 @@ static const struct rate_ctr_desc all_rtp_conn_rate_ctr_desc[] = {
 	[RTP_NUM_CONNECTIONS] = {"all_rtp:num_closed_conns", "Total number of rtp connections closed."}
 };
 
+/* Was conn configured to handle Osmux? */
+static inline bool mgcp_conn_rtp_is_osmux(const struct mgcp_conn_rtp *conn) {
+	return conn->type == MGCP_OSMUX_BSC || conn->type == MGCP_OSMUX_BSC_NAT;
+}
+
 struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
 				  enum mgcp_conn_type type, char *name);
 struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, const char *id);
@@ -78,3 +186,5 @@ void mgcp_conn_free_oldest(struct mgcp_endpoint *endp);
 void mgcp_conn_free_all(struct mgcp_endpoint *endp);
 char *mgcp_conn_dump(struct mgcp_conn *conn);
 struct mgcp_conn *mgcp_find_dst_conn(struct mgcp_conn *conn);
+struct mgcp_conn *mgcp_conn_get_oldest(struct mgcp_endpoint *endp);
+void mgcp_conn_watchdog_kick(struct mgcp_conn *conn);

include/osmocom/mgcp/mgcp_ctrl.h

@@ -0,0 +1,24 @@
+/*
+ * (C) 2020 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#pragma once
+
+struct ctrl_handle *mgw_ctrl_interface_setup(struct mgcp_config *cfg,
+                                             const char *bind_addr, uint16_t port);
+

include/osmocom/mgcp/mgcp_e1.h

@@ -0,0 +1,27 @@
+#pragma once
+
+/* A 64k timeslot on an E1 line can be subdevied into the following
+ * subslot combinations:
+ *
+ * subslot:                                          offset:
+ * [          ][          ][   16k    ][8k_subslot]  0
+ * [          ][   32k    ][_subslot__][8k_subslot]  1
+ * [          ][ subslot  ][   16k    ][8k_subslot]  2
+ * [   64k    ][__________][_subslot__][8k_subslot]  3
+ * [ timeslot ][          ][   16k    ][8k_subslot]  4
+ * [          ][   32K    ][_subslot__][8k_subslot]  5
+ * [          ][ subslot  ][   16k    ][8k_subslot]  6
+ * [          ][          ][ subslot  ][8k_subslot]  7
+ *
+ * Since overlapping assignment of subslots is not possible there is a limited
+ * set of subslot assignments possible. The e1_rates array lists the possible
+ * assignments as depicted above. Also each subslot assignment comes along with
+ * a bit offset in the E1 bitstream. The e1_offsets arrays lists the bit
+ * offsets. */
+static const uint8_t e1_rates[] = { 64, 32, 32, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8 };
+static const uint8_t e1_offsets[] = { 0, 0, 4, 0, 2, 4, 6, 0, 1, 2, 3, 4, 5, 6, 7 };
+
+int mgcp_e1_endp_equip(struct mgcp_endpoint *endp, uint8_t ts, uint8_t ss, uint8_t offs);
+void mgcp_e1_endp_update(struct mgcp_endpoint *endp);
+void mgcp_e1_endp_release(struct mgcp_endpoint *endp);
+int mgcp_e1_send_rtp(struct mgcp_endpoint *endp, struct mgcp_rtp_codec *codec, struct msgb *msg);

include/osmocom/mgcp/mgcp_endp.h

@@ -23,15 +23,35 @@
 
 #pragma once
 
-struct sockaddr_in;
+#include <osmocom/core/msgb.h>
+#include <osmocom/gsm/i460_mux.h>
+
+struct sockaddr;
 struct mgcp_conn;
+struct mgcp_conn_rtp;
 struct mgcp_endpoint;
 
-/* Callback type for RTP dispatcher functions
-   (e.g mgcp_dispatch_rtp_bridge_cb, see below) */
-typedef int (*mgcp_dispatch_rtp_cb) (int proto, struct sockaddr_in *addr,
-				     char *buf, unsigned int buf_size,
-				     struct mgcp_conn *conn);
+/* Number of E1 subslots (different variants, not all useable at the same time) */
+#define MGCP_ENDP_E1_SUBSLOTS 15
+
+#define LOGPENDP(endp, cat, level, fmt, args...) \
+LOGP(cat, level, "endpoint:%s " fmt, \
+     endp ? endp->name : "none", \
+     ## args)
+
+struct osmo_rtp_msg_ctx {
+	int proto;
+	struct mgcp_conn_rtp *conn_src;
+	struct osmo_sockaddr *from_addr;
+};
+
+#define OSMO_RTP_MSG_CTX(MSGB) ((struct osmo_rtp_msg_ctx*)(MSGB)->cb)
+
+osmo_static_assert(sizeof(((struct msgb*)0)->cb) >= sizeof(struct osmo_rtp_msg_ctx), osmo_rtp_msg_ctx_fits_in_msgb_cb);
+
+/* Callback type for RTP dispatcher functions (e.g mgcp_dispatch_rtp_bridge_cb, see below).
+ * The OSMO_RTP_MSG_CTX() should be set appropriately on the msg. */
+typedef int (*mgcp_dispatch_rtp_cb) (struct msgb *msg);
 
 /* Callback type for endpoint specific cleanup actions. This function
  * is automatically executed when a connection is freed (see mgcp_conn_free()
@@ -55,6 +75,7 @@ struct mgcp_endpoint_type {
 /*! MGCP endpoint typeset */
 struct mgcp_endpoint_typeset {
 	struct mgcp_endpoint_type rtp;
+	struct mgcp_endpoint_type e1;
 };
 
 /*! static MGCP endpoint typeset (pre-initalized, read-only) */
@@ -63,6 +84,9 @@ extern const struct mgcp_endpoint_typeset ep_typeset;
 /*! MGCP endpoint model */
 struct mgcp_endpoint {
 
+	/*! Unique endpoint name, used for addressing via MGCP */
+	char *name;
+
 	/*! Call identifier string (as supplied by the call agant) */
 	char *callid;
 
@@ -75,8 +99,8 @@ struct mgcp_endpoint {
 	/*! Backpointer to the MGW configuration */
 	struct mgcp_config *cfg;
 
-	/*! Backpointer to the Trunk specific configuration */
-	struct mgcp_trunk_config *tcfg;
+	/*! Backpointer to the trunk this endpoint belongs to */
+	struct mgcp_trunk *trunk;
 
 	/*! Endpoint properties (see above) */
 	const struct mgcp_endpoint_type *type;
@@ -93,9 +117,27 @@ struct mgcp_endpoint {
 
 	/*! MGCP_X_OSMO_IGN_* flags from 'X-Osmo-IGN:' header */
 	uint32_t x_osmo_ign;
+
+	/* E1 specific */
+	struct {
+		struct osmo_i460_schan_desc scd;
+		struct osmo_i460_subchan *schan;
+		struct osmo_fsm_inst *trau_sync_fi;
+		struct osmo_trau2rtp_state *trau_rtp_st;
+		uint8_t last_amr_ft;
+		struct mgcp_rtp_codec *last_codec;
+	} e1;
+
 };
 
-/*! Extract endpoint number for a given endpoint */
-#define ENDPOINT_NUMBER(endp) abs((int)(endp - endp->tcfg->endpoints))
-
+struct mgcp_endpoint *mgcp_endp_alloc(struct mgcp_trunk *trunk, unsigned int index);
 void mgcp_endp_release(struct mgcp_endpoint *endp);
+int mgcp_endp_claim(struct mgcp_endpoint *endp, const char *callid);
+void mgcp_endp_update(struct mgcp_endpoint *endp);
+struct mgcp_endpoint *mgcp_endp_by_name_trunk(int *cause, const char *epname,
+					      const struct mgcp_trunk *trunk);
+struct mgcp_endpoint *mgcp_endp_by_name(int *cause, const char *epname,
+					struct mgcp_config *cfg);
+bool mgcp_endp_avail(struct mgcp_endpoint *endp);
+void mgcp_endp_add_conn(struct mgcp_endpoint *endp, struct mgcp_conn *conn);
+void mgcp_endp_remove_conn(struct mgcp_endpoint *endp, struct mgcp_conn *conn);

include/osmocom/mgcp/mgcp_internal.h

@@ -1,352 +0,0 @@
-/* MGCP Private Data */
-
-/*
- * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2009-2012 by On-Waves
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#pragma once
-
-#include <string.h>
-#include <inttypes.h>
-#include <osmocom/core/select.h>
-#include <osmocom/mgcp/mgcp.h>
-#include <osmocom/core/linuxlist.h>
-#include <osmocom/core/counter.h>
-#include <osmocom/core/rate_ctr.h>
-
-#define CI_UNUSED 0
-
-/* FIXME: This this is only needed to compile the currently
- * broken OSMUX support. Remove when fixed */
-#define CONN_ID_BTS "0"
-#define CONN_ID_NET "1"
-
-enum mgcp_trunk_type {
-	MGCP_TRUNK_VIRTUAL,
-	MGCP_TRUNK_E1,
-};
-
-struct mgcp_rtp_stream_state {
-	uint32_t ssrc;
-	uint16_t last_seq;
-	uint32_t last_timestamp;
-	struct rate_ctr *err_ts_ctr;
-	int32_t last_tsdelta;
-	uint32_t last_arrival_time;
-};
-
-struct mgcp_rtp_state {
-	/* has this state structure been initialized? */
-	int initialized;
-
-	struct {
-		/* are we patching the SSRC value? */
-		int patch_ssrc;
-		/* original SSRC (to which we shall patch any different SSRC) */
-		uint32_t orig_ssrc;
-		/* offset to apply on the sequence number */
-		int seq_offset;
-		/* offset to apply on the timestamp number */
-		int32_t timestamp_offset;
-	} patch;
-
-	/* duration of a packet (FIXME: in which unit?) */
-	uint32_t packet_duration;
-
-	struct mgcp_rtp_stream_state in_stream;
-	struct mgcp_rtp_stream_state out_stream;
-
-	/* jitter and packet loss calculation */
-	struct {
-		int initialized;
-		uint16_t base_seq;
-		uint16_t max_seq;
-		uint32_t ssrc;
-		uint32_t jitter;
-		int32_t transit;
-		int cycles;
-	} stats;
-
-	bool patched_first_rtp_payload; /* FIXME: drop this, see OS#2459 */
-};
-
-struct mgcp_rtp_codec {
-	uint32_t rate;
-	int channels;
-	uint32_t frame_duration_num;
-	uint32_t frame_duration_den;
-
-	int payload_type;
-	char *audio_name;
-	char *subtype_name;
-
-	bool param_present;
-	struct mgcp_codec_param param;
-};
-
-/* 'mgcp_rtp_end': basically a wrapper around the RTP+RTCP ports */
-struct mgcp_rtp_end {
-	/* local IP address of the RTP socket */
-	struct in_addr addr;
-
-	/* in network byte order */
-	int rtp_port, rtcp_port;
-
-	/* currently selected audio codec */
-	struct mgcp_rtp_codec *codec;
-
-	/* array with assigned audio codecs to choose from (SDP) */
-	struct mgcp_rtp_codec codecs[MGCP_MAX_CODECS];
-
-	/* number of assigned audio codecs (SDP) */
-	unsigned int codecs_assigned;
-
-	/* per endpoint data */
-	int  frames_per_packet;
-	uint32_t packet_duration_ms;
-	int maximum_packet_time; /* -1: not set */
-	char *fmtp_extra;
-	/* are we transmitting packets (1) or dropping (0) outbound packets */
-	int output_enabled;
-	/* FIXME: This parameter can be set + printed, but is nowhere used! */
-	int force_output_ptime;
-
-	/* RTP patching */
-	int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
-	/* should we perform align_rtp_timestamp_offset() (1) or not (0) */
-	int force_aligned_timing;
-	bool rfc5993_hr_convert;
-
-	/* Each end has a separate socket for RTP and RTCP */
-	struct osmo_fd rtp;
-	struct osmo_fd rtcp;
-
-	/* local UDP port number of the RTP socket; RTCP is +1 */
-	int local_port;
-};
-
-struct mgcp_rtp_tap {
-	/* is this tap active (1) or not (0) */
-	int enabled;
-	/* IP/port to which we're forwarding the tapped data */
-	struct sockaddr_in forward;
-};
-
-struct mgcp_lco {
-	char *string;
-	char *codec;
-	int pkt_period_min; /* time in ms */
-	int pkt_period_max; /* time in ms */
-};
-
-/* Specific rtp connection type (see struct mgcp_conn_rtp) */
-enum mgcp_conn_rtp_type {
-	MGCP_RTP_DEFAULT	= 0,
-	MGCP_OSMUX_BSC,
-	MGCP_OSMUX_BSC_NAT,
-};
-
-#include <osmocom/mgcp/osmux.h>
-struct mgcp_conn;
-
-/* MGCP connection (RTP) */
-struct mgcp_conn_rtp {
-
-	/* Backpointer to conn struct */
-	struct mgcp_conn *conn;
-
-	/* Specific connection type */
-	enum mgcp_conn_rtp_type type;
-
-	/* Port status */
-	struct mgcp_rtp_end end;
-
-	/* Sequence bits */
-	struct mgcp_rtp_state state;
-
-	/* taps for the rtp connection; one per direction */
-	struct mgcp_rtp_tap tap_in;
-	struct mgcp_rtp_tap tap_out;
-
-	/* Osmux states (optional) */
-	struct {
-		/* Osmux state: disabled, activating, active */
-		enum osmux_state state;
-		/* Is cid holding valid data? is it allocated from pool? */
-		bool cid_allocated;
-		/* Allocated Osmux circuit ID for this conn */
-		uint8_t cid;
-		/* handle to batch messages */
-		struct osmux_in_handle *in;
-		/* handle to unbatch messages */
-		struct osmux_out_handle out;
-		/* statistics */
-		struct {
-			uint32_t chunks;
-			uint32_t octets;
-		} stats;
-	} osmux;
-
-	struct rate_ctr_group *rate_ctr_group;
-};
-
-/*! Connection type, specifies which member of the union "u" in mgcp_conn
- *  contains a useful connection description (currently only RTP) */
-enum mgcp_conn_type {
-	MGCP_CONN_TYPE_RTP,
-};
-
-/*! MGCP connection (untyped) */
-struct mgcp_conn {
-	/*! list head */
-	struct llist_head entry;
-
-	/*! Backpointer to the endpoint where the conn belongs to */
-	struct mgcp_endpoint *endp;
-
-	/*! type of the connection (union) */
-	enum mgcp_conn_type type;
-
-	/*! mode of the connection */
-	enum mgcp_connection_mode mode;
-
-	/*! copy of the mode to restore the original setting (VTY) */
-	enum mgcp_connection_mode mode_orig;
-
-	/*! connection id to identify the connection */
-	char id[MGCP_CONN_ID_MAXLEN];
-
-	/*! human readable name (vty, logging) */
-	char name[256];
-
-	/*! activity tracker (for cleaning up inactive connections) */
-	struct osmo_timer_list watchdog;
-
-	/*! union with connection description */
-	union {
-		struct mgcp_conn_rtp rtp;
-	} u;
-
-	/*! pointer to optional private data */
-	void *priv;
-};
-
-#include <osmocom/mgcp/mgcp_conn.h>
-
-struct mgcp_endpoint_type;
-
-
-
-
-
-/**
- * Internal structure while parsing a request
- */
-struct mgcp_parse_data {
-	struct mgcp_config *cfg;
-	struct mgcp_endpoint *endp;
-	char *trans;
-	char *save;
-};
-
-int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr,
-	      char *buf, int rc, struct mgcp_conn_rtp *conn_src,
-	      struct mgcp_conn_rtp *conn_dst);
-int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn);
-int mgcp_dispatch_rtp_bridge_cb(int proto, struct sockaddr_in *addr, char *buf,
-				unsigned int buf_size, struct mgcp_conn *conn);
-void mgcp_cleanup_rtp_bridge_cb(struct mgcp_endpoint *endp, struct mgcp_conn *conn);
-int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port,
-			   struct mgcp_conn_rtp *conn);
-void mgcp_free_rtp_port(struct mgcp_rtp_end *end);
-
-/* For transcoding we need to manage an in and an output that are connected */
-static inline int endp_back_channel(int endpoint)
-{
-	return endpoint + 60;
-}
-
-struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int index);
-struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index);
-
-char *get_lco_identifier(const char *options);
-int check_local_cx_options(void *ctx, const char *options);
-void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
-			 struct mgcp_rtp_end *rtp);
-uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
-				  struct mgcp_rtp_end *rtp);
-
-/* payload processing default functions */
-int mgcp_rtp_processing_default(struct mgcp_endpoint *endp, struct mgcp_rtp_end *dst_end,
-				char *data, int *len, int buf_size);
-
-int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp,
-				      struct mgcp_conn_rtp *conn_dst,
-				      struct mgcp_conn_rtp *conn_src);
-
-void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
-					  const struct mgcp_rtp_codec **codec,
-					  const char **fmtp_extra,
-					  struct mgcp_conn_rtp *conn);
-
-/* internal RTP Annex A counting */
-void mgcp_rtp_annex_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
-			const uint16_t seq, const int32_t transit,
-			const uint32_t ssrc);
-
-int mgcp_set_ip_tos(int fd, int tos);
-
-/* Was conn configured to handle Osmux? */
-static inline bool mgcp_conn_rtp_is_osmux(const struct mgcp_conn_rtp *conn) {
-	return conn->type == MGCP_OSMUX_BSC || conn->type == MGCP_OSMUX_BSC_NAT;
-}
-
-enum {
-	MGCP_DEST_NET = 0,
-	MGCP_DEST_BTS,
-};
-
-
-#define MGCP_DUMMY_LOAD 0x23
-
-
-/**
- * SDP related information
- */
-/* Assume audio frame length of 20ms */
-#define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20
-#define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000
-#define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20
-#define DEFAULT_RTP_AUDIO_DEFAULT_RATE  8000
-#define DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS 1
-
-#define PTYPE_UNDEFINED (-1)
-
-void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn);
-void mgcp_conn_watchdog_kick(struct mgcp_conn *conn);
-
-#define LOGPENDP(endp, cat, level, fmt, args...) \
-LOGP(cat, level, "endpoint:0x%x " fmt, \
-     endp ? ENDPOINT_NUMBER(endp) : -1, \
-     ## args)
-
-#define LOGPCONN(conn, cat, level, fmt, args...) \
-LOGPENDP((conn)->endp, cat, level, "CI:%s " fmt, \
-         (conn)->id, \
-         ## args)

include/osmocom/mgcp/mgcp_network.h

@@ -0,0 +1,169 @@
+#pragma once
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include <osmocom/core/socket.h>
+
+#include <osmocom/mgcp/mgcp.h>
+
+#define MGCP_DUMMY_LOAD 0x23
+#define RTP_BUF_SIZE	4096
+
+struct mgcp_rtp_stream_state {
+	uint32_t ssrc;
+	uint16_t last_seq;
+	uint32_t last_timestamp;
+	struct rate_ctr *err_ts_ctr;
+	int32_t last_tsdelta;
+	uint32_t last_arrival_time;
+};
+
+struct mgcp_rtp_state {
+	/* has this state structure been initialized? */
+	int initialized;
+
+	struct {
+		/* are we patching the SSRC value? */
+		int patch_ssrc;
+		/* original SSRC (to which we shall patch any different SSRC) */
+		uint32_t orig_ssrc;
+		/* offset to apply on the sequence number */
+		int seq_offset;
+		/* offset to apply on the timestamp number */
+		int32_t timestamp_offset;
+	} patch;
+
+	/* duration of a packet (FIXME: in which unit?) */
+	uint32_t packet_duration;
+
+	/* Note: These states are not continuously updated, they serve as an
+	 * information source to patch certain values in the RTP header. Do
+	 * not use this state if constantly updated data about the RTP stream
+	 * is needed. (see also mgcp_patch_and_count() */
+	struct mgcp_rtp_stream_state in_stream;
+	struct mgcp_rtp_stream_state out_stream;
+
+	/* jitter and packet loss calculation */
+	struct {
+		int initialized;
+		uint16_t base_seq;
+		uint16_t max_seq;
+		uint32_t ssrc;
+		uint32_t jitter;
+		int32_t transit;
+		int cycles;
+	} stats;
+
+	/* Alternative values for RTP tx, in case no sufficient header
+	 * information is available so the header needs to be generated
+	 * locally (when just forwarding packets, the header of incoming
+	 * data is just re-used) */
+	uint16_t alt_rtp_tx_sequence;
+	uint32_t alt_rtp_tx_ssrc;
+
+	bool patched_first_rtp_payload; /* FIXME: drop this, see OS#2459 */
+};
+
+struct mgcp_rtp_codec {
+	uint32_t rate;
+	int channels;
+	uint32_t frame_duration_num;
+	uint32_t frame_duration_den;
+
+	int payload_type;
+	char *audio_name;
+	char *subtype_name;
+
+	bool param_present;
+	struct mgcp_codec_param param;
+};
+
+/* 'mgcp_rtp_end': basically a wrapper around the RTP+RTCP ports */
+struct mgcp_rtp_end {
+	/* remote IP address of the RTP socket */
+	struct osmo_sockaddr addr;
+
+	/* in network byte order */
+	int rtp_port, rtcp_port;
+
+	/* currently selected audio codec */
+	struct mgcp_rtp_codec *codec;
+
+	/* array with assigned audio codecs to choose from (SDP) */
+	struct mgcp_rtp_codec codecs[MGCP_MAX_CODECS];
+
+	/* number of assigned audio codecs (SDP) */
+	unsigned int codecs_assigned;
+
+	/* per endpoint data */
+	int  frames_per_packet;
+	uint32_t packet_duration_ms;
+	int maximum_packet_time; /* -1: not set */
+	char *fmtp_extra;
+	/* are we transmitting packets (1) or dropping (0) outbound packets */
+	int output_enabled;
+	/* FIXME: This parameter can be set + printed, but is nowhere used! */
+	int force_output_ptime;
+
+	/* RTP patching */
+	int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
+	/* should we perform align_rtp_timestamp_offset() (1) or not (0) */
+	int force_aligned_timing;
+	bool rfc5993_hr_convert;
+
+	/* Each end has a separate socket for RTP and RTCP */
+	struct osmo_fd rtp;
+	struct osmo_fd rtcp;
+
+	/* local UDP port number of the RTP socket; RTCP is +1 */
+	int local_port;
+	/* where the endpoint RTP connection binds to, set during CRCX and
+	 * possibly updated during MDCX */
+	char local_addr[INET6_ADDRSTRLEN];
+};
+
+struct mgcp_rtp_tap {
+	/* is this tap active (1) or not (0) */
+	int enabled;
+	/* IP/port to which we're forwarding the tapped data */
+	struct osmo_sockaddr forward;
+};
+
+struct mgcp_conn;
+
+int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct osmo_sockaddr *addr,
+	      struct msgb *msg, struct mgcp_conn_rtp *conn_src,
+	      struct mgcp_conn_rtp *conn_dst);
+int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn);
+int mgcp_dispatch_rtp_bridge_cb(struct msgb *msg);
+void mgcp_cleanup_rtp_bridge_cb(struct mgcp_endpoint *endp, struct mgcp_conn *conn);
+int mgcp_dispatch_e1_bridge_cb(struct msgb *msg);
+void mgcp_cleanup_e1_bridge_cb(struct mgcp_endpoint *endp, struct mgcp_conn *conn);
+int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port,
+			   struct mgcp_conn_rtp *conn);
+void mgcp_free_rtp_port(struct mgcp_rtp_end *end);
+void mgcp_patch_and_count(struct mgcp_endpoint *endp,
+			  struct mgcp_rtp_state *state,
+			  struct mgcp_rtp_end *rtp_end,
+			  struct osmo_sockaddr *addr, struct msgb *msg);
+void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn);
+int mgcp_set_ip_tos(int fd, int tos);
+
+/* payload processing default functions */
+int mgcp_rtp_processing_default(struct mgcp_endpoint *endp, struct mgcp_rtp_end *dst_end,
+				char *data, int *len, int buf_size);
+
+int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp,
+				      struct mgcp_conn_rtp *conn_dst,
+				      struct mgcp_conn_rtp *conn_src);
+
+void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
+					  const struct mgcp_rtp_codec **codec,
+					  const char **fmtp_extra,
+					  struct mgcp_conn_rtp *conn);
+
+/* internal RTP Annex A counting */
+void mgcp_rtp_annex_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
+			const uint16_t seq, const int32_t transit,
+			const uint32_t ssrc);

include/osmocom/mgcp/mgcp_protocol.h

@@ -0,0 +1,27 @@
+#pragma once
+
+/* Internal structure while parsing a request */
+struct mgcp_parse_data {
+	struct mgcp_config *cfg;
+	struct mgcp_endpoint *endp;
+	char *trans;
+	char *save;
+};
+
+/* Local connection options */
+struct mgcp_lco {
+	char *string;
+	char *codec;
+	int pkt_period_min; /* time in ms */
+	int pkt_period_max; /* time in ms */
+};
+
+char *get_lco_identifier(const char *options);
+int check_local_cx_options(void *ctx, const char *options);
+
+struct mgcp_rtp_end;
+void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
+			 struct mgcp_rtp_end *rtp);
+
+uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
+				  struct mgcp_rtp_end *rtp);

include/osmocom/mgcp/mgcp_ratectr.h

@@ -0,0 +1,95 @@
+#pragma once
+
+
+/* Global MCGP general rate counters */
+enum {
+	MGCP_GENERAL_RX_MSGS_TOTAL,
+	MGCP_GENERAL_RX_MSGS_RETRANSMITTED,
+	MGCP_GENERAL_RX_MSGS_HANDLED,
+	MGCP_GENERAL_RX_MSGS_UNHANDLED,
+	MGCP_GENERAL_RX_FAIL_MSG_PARSE,
+	MGCP_GENERAL_RX_FAIL_NO_ENDPOINT,
+};
+
+/* Trunk-global MCGP CRCX related rate counters */
+enum {
+	MGCP_CRCX_SUCCESS,
+	MGCP_CRCX_FAIL_BAD_ACTION,
+	MGCP_CRCX_FAIL_UNHANDLED_PARAM,
+	MGCP_CRCX_FAIL_MISSING_CALLID,
+	MGCP_CRCX_FAIL_INVALID_MODE,
+	MGCP_CRCX_FAIL_LIMIT_EXCEEDED,
+	MGCP_CRCX_FAIL_UNKNOWN_CALLID,
+	MGCP_CRCX_FAIL_ALLOC_CONN,
+	MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC,
+	MGCP_CRCX_FAIL_START_RTP,
+	MGCP_CRCX_FAIL_REJECTED_BY_POLICY,
+	MGCP_CRCX_FAIL_NO_OSMUX,
+	MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS,
+	MGCP_CRCX_FAIL_CODEC_NEGOTIATION,
+	MGCP_CRCX_FAIL_BIND_PORT,
+	MGCP_CRCX_FAIL_AVAIL,
+	MGCP_CRCX_FAIL_CLAIM,
+};
+
+/* Trunk-global MCGP MDCX related rate counters */
+enum {
+	MGCP_MDCX_SUCCESS,
+	MGCP_MDCX_FAIL_WILDCARD,
+	MGCP_MDCX_FAIL_NO_CONN,
+	MGCP_MDCX_FAIL_INVALID_CALLID,
+	MGCP_MDCX_FAIL_INVALID_CONNID,
+	MGCP_MDCX_FAIL_UNHANDLED_PARAM,
+	MGCP_MDCX_FAIL_NO_CONNID,
+	MGCP_MDCX_FAIL_CONN_NOT_FOUND,
+	MGCP_MDCX_FAIL_INVALID_MODE,
+	MGCP_MDCX_FAIL_INVALID_CONN_OPTIONS,
+	MGCP_MDCX_FAIL_NO_REMOTE_CONN_DESC,
+	MGCP_MDCX_FAIL_START_RTP,
+	MGCP_MDCX_FAIL_REJECTED_BY_POLICY,
+	MGCP_MDCX_DEFERRED_BY_POLICY,
+	MGCP_MDCX_FAIL_AVAIL,
+};
+
+/* Trunk-global MCGP DLCX related rate counters */
+enum {
+	MGCP_DLCX_SUCCESS,
+	MGCP_DLCX_FAIL_WILDCARD,
+	MGCP_DLCX_FAIL_NO_CONN,
+	MGCP_DLCX_FAIL_INVALID_CALLID,
+	MGCP_DLCX_FAIL_INVALID_CONNID,
+	MGCP_DLCX_FAIL_UNHANDLED_PARAM,
+	MGCP_DLCX_FAIL_REJECTED_BY_POLICY,
+	MGCP_DLCX_DEFERRED_BY_POLICY,
+	MGCP_DLCX_FAIL_AVAIL,
+};
+
+/* Trunk-global E1 related counters */
+enum {
+        E1_I460_TRAU_RX_FAIL_CTR,
+        E1_I460_TRAU_TX_FAIL_CTR,
+        E1_I460_TRAU_MUX_EMPTY_CTR,
+};
+
+/* NOTE: When adding counters, also the dump_ratectr_* routines in vty.c must be updated. */
+
+struct mgcp_ratectr_global {
+	/* Rate counter group which contains stats for generic MGCP events. */
+	struct rate_ctr_group *mgcp_general_ctr_group;
+};
+
+struct mgcp_ratectr_trunk {
+	/* Rate counter group which contains stats for processed CRCX commands. */
+	struct rate_ctr_group *mgcp_crcx_ctr_group;
+	/* Rate counter group which contains stats for processed MDCX commands. */
+	struct rate_ctr_group *mgcp_mdcx_ctr_group;
+	/* Rate counter group which contains stats for processed DLCX commands. */
+	struct rate_ctr_group *mgcp_dlcx_ctr_group;
+	/* Rate counter group which aggregates stats of individual RTP connections. */
+	struct rate_ctr_group *all_rtp_conn_stats;
+	/* Rate counter group which contains stats for E1 events (only valid for E1 trunks) */
+	struct rate_ctr_group *e1_stats;
+};
+
+int mgcp_ratectr_global_alloc(void *ctx, struct mgcp_ratectr_global *ratectr);
+int mgcp_ratectr_trunk_alloc(void *ctx, struct mgcp_ratectr_trunk *ratectr);

include/osmocom/mgcp/mgcp_stat.h

@@ -24,7 +24,6 @@
 
 #pragma once
 
-#include <osmocom/mgcp/mgcp_internal.h>
 #include <inttypes.h>
 
 void mgcp_format_stats(char *str, size_t str_len,  struct mgcp_conn *conn);

include/osmocom/mgcp/mgcp_trunk.h

@@ -0,0 +1,78 @@
+#pragma once
+
+#include <osmocom/gsm/i460_mux.h>
+
+#define LOGPTRUNK(trunk, cat, level, fmt, args...) \
+LOGP(cat, level, "trunk:%u " fmt, \
+     trunk ? trunk->trunk_nr : 0, \
+     ## args)
+
+
+enum mgcp_trunk_type {
+	MGCP_TRUNK_VIRTUAL,
+	MGCP_TRUNK_E1,
+};
+
+struct mgcp_trunk {
+	struct llist_head entry;
+
+	struct mgcp_config *cfg;
+
+	int trunk_nr;
+	enum mgcp_trunk_type trunk_type;
+
+	char *audio_fmtp_extra;
+	int audio_send_ptime;
+	int audio_send_name;
+
+	int no_audio_transcoding;
+
+	int omit_rtcp;
+	int keepalive_interval;
+
+	/* RTP patching */
+	int force_constant_ssrc; /* 0: don't, 1: once */
+	int force_aligned_timing;
+	bool rfc5993_hr_convert;
+
+	/* spec handling */
+	int force_realloc;
+
+	/* timer */
+	struct osmo_timer_list keepalive_timer;
+
+	/* When set, incoming RTP packets are not filtered
+	 * when ports and ip-address do not match (debug) */
+	int rtp_accept_all;
+
+	unsigned int number_endpoints;
+	struct mgcp_endpoint **endpoints;
+
+	/* global rate counters to measure the trunks overall performance and health */
+	struct mgcp_ratectr_trunk ratectr;
+
+	union {
+		/* Virtual trunk specific */
+		struct {
+			unsigned int vty_number_endpoints;
+		} v;
+		/* E1 specific */
+		struct {
+			unsigned int vty_line_nr;
+			bool ts_in_use[31];
+			struct osmo_i460_timeslot i460_ts[31];
+		} e1;
+	};
+};
+
+struct mgcp_trunk *mgcp_trunk_alloc(struct mgcp_config *cfg, enum mgcp_trunk_type ttype, int nr);
+int mgcp_trunk_equip(struct mgcp_trunk *trunk);
+struct mgcp_trunk *mgcp_trunk_by_num(const struct mgcp_config *cfg, enum mgcp_trunk_type ttype, int nr);
+struct mgcp_trunk *mgcp_trunk_by_name(const struct mgcp_config *cfg, const char *epname);
+int e1_trunk_nr_from_epname(const char *epname);
+struct mgcp_trunk *mgcp_trunk_by_line_num(const struct mgcp_config *cfg, unsigned int num);
+
+/* The virtual trunk is always created on trunk id 0 for historical reasons,
+ * use this define constant as ID when allocating a virtual trunk. Other
+ * trunks may be assigned with arbritrary id numbers */
+#define MGCP_VIRT_TRUNK_ID 0

include/osmocom/mgcp/osmux.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <osmocom/core/socket.h>
 
 #include <osmocom/netif/osmux.h>
 struct mgcp_conn_rtp;
@@ -13,7 +14,7 @@ enum {
 
 int osmux_init(int role, struct mgcp_config *cfg);
 int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
-		      struct in_addr *addr, uint16_t port);
+		      struct osmo_sockaddr *addr, uint16_t port);
 void conn_osmux_disable(struct mgcp_conn_rtp *conn);
 int conn_osmux_allocate_cid(struct mgcp_conn_rtp *conn, int osmux_cid);
 void conn_osmux_release_cid(struct mgcp_conn_rtp *conn);

include/osmocom/mgcp/vty.h

@@ -6,3 +6,7 @@ enum mgcp_vty_node {
 	MGCP_NODE = _LAST_OSMOVTY_NODE + 1,
 	TRUNK_NODE,
 };
+
+enum mgw_vty_cmd_attr {
+	MGW_CMD_ATTR_NEWCONN = 0,
+};

include/osmocom/mgcp_client/mgcp_client.h

@@ -6,7 +6,7 @@
 #include <osmocom/mgcp_client/mgcp_common.h>
 
 /* See also: RFC 3435, chapter 3.5 Transmission over UDP */
-#define MGCP_CLIENT_LOCAL_ADDR_DEFAULT "0.0.0.0"
+#define MGCP_CLIENT_LOCAL_ADDR_DEFAULT NULL /* INADDR(6)_ANY */
 #define MGCP_CLIENT_LOCAL_PORT_DEFAULT 2727
 #define MGCP_CLIENT_REMOTE_ADDR_DEFAULT "127.0.0.1"
 #define MGCP_CLIENT_REMOTE_PORT_DEFAULT 2427
@@ -75,7 +75,7 @@ struct mgcp_response {
 	char *body;
 	struct mgcp_response_head head;
 	uint16_t audio_port;
-	char audio_ip[INET_ADDRSTRLEN];
+	char audio_ip[INET6_ADDRSTRLEN];
 	unsigned int ptime;
 	enum mgcp_codecs codecs[MGCP_MAX_CODECS];
 	unsigned int codecs_len;
@@ -133,10 +133,12 @@ int mgcp_client_connect(struct mgcp_client *mgcp);
 
 const char *mgcp_client_remote_addr_str(struct mgcp_client *mgcp);
 uint16_t mgcp_client_remote_port(struct mgcp_client *mgcp);
-uint32_t mgcp_client_remote_addr_n(struct mgcp_client *mgcp);
+uint32_t mgcp_client_remote_addr_n(struct mgcp_client *mgcp) OSMO_DEPRECATED("deprecated, returns 0");
 
 const char *mgcp_client_endpoint_domain(const struct mgcp_client *mgcp);
 const char *mgcp_client_rtpbridge_wildcard(const struct mgcp_client *mgcp);
+const char *mgcp_client_e1_epname(void *ctx, const struct mgcp_client *mgcp, uint8_t trunk_id, uint8_t ts,
+				  uint8_t rate, uint8_t offset);
 
 /* Invoked when an MGCP response is received or sending failed.  When the
  * response is passed as NULL, this indicates failure during transmission. */

include/osmocom/mgcp_client/mgcp_client_fsm.h

@@ -8,14 +8,14 @@
  *  (either remote or local). It is used to pass parameters (local) to the FSM
  *  and get responses (remote) from the FSM as pointer attached to the FSM
  *  event.
- * 
+ *
  *  When modifiying a connection, the endpoint and call_id members may be left
  *  unpopulated. The call_id field is ignored in this case. If an endpoint
  *  identifier is supplied it is checked against the internal state to make
  *  sure it is correct. */
 struct mgcp_conn_peer {
 	/*! RTP connection IP-Address (optional, string e.g. "127.0.0.1") */
-	char addr[INET_ADDRSTRLEN];
+	char addr[INET6_ADDRSTRLEN];
 
 	/*! RTP connection IP-Port (optional)  */
 	uint16_t port;

include/osmocom/mgcp_client/mgcp_client_internal.h

@@ -6,7 +6,6 @@
 
 struct mgcp_client {
 	struct mgcp_client_conf actual;
-	uint32_t remote_addr;
 	struct osmo_wqueue wq;
 	mgcp_trans_id_t next_trans_id;
 	struct llist_head responses_pending;

src/libosmo-mgcp-client/Makefile.am

@@ -20,7 +20,7 @@ AM_LDFLAGS = \
 
 # This is not at all related to the release version, but a range of supported
 # API versions. Read TODO_RELEASE in the source tree's root!
-MGCP_CLIENT_LIBVERSION=6:0:0
+MGCP_CLIENT_LIBVERSION=7:0:1
 
 lib_LTLIBRARIES = \
 	libosmo-mgcp-client.la \

src/libosmo-mgcp-client/mgcp_client.c

@@ -25,6 +25,7 @@
 #include <osmocom/core/logging.h>
 #include <osmocom/core/byteswap.h>
 #include <osmocom/core/socket.h>
+#include <osmocom/core/sockaddr_str.h>
 
 #include <osmocom/mgcp_client/mgcp_client.h>
 #include <osmocom/mgcp_client/mgcp_client_internal.h>
@@ -370,22 +371,37 @@ static int mgcp_parse_audio_ptime_rtpmap(struct mgcp_response *r, const char *li
 /* Parse a line like "c=IN IP4 10.11.12.13" */
 static int mgcp_parse_audio_ip(struct mgcp_response *r, const char *line)
 {
-	struct in_addr ip_test;
+	struct in6_addr ip_test;
+	bool is_ipv6;
 
-	if (strlen(line) < 16)
+	if (strncmp("c=IN IP", line, 7) != 0)
 		goto response_parse_failure;
-
-	/* The current implementation strictly supports IPV4 only ! */
-	if (memcmp("c=IN IP4 ", line, 9) != 0)
+	line += 7;
+	if (*line == '6')
+		is_ipv6 = true;
+	else if (*line == '4')
+		is_ipv6 = false;
+	else
 		goto response_parse_failure;
-
-	/* Extract IP-Address */
-	osmo_strlcpy(r->audio_ip, line + 9, sizeof(r->audio_ip));
-
-	/* Check IP-Address */
-	if (inet_aton(r->audio_ip, &ip_test) == 0)
+	line++;
+	if (*line != ' ')
 		goto response_parse_failure;
+	line++;
 
+	/* Extract and check IP-Address */
+	if (is_ipv6) {
+		/* 45 = INET6_ADDRSTRLEN -1 */
+		if (sscanf(line, "%45s", r->audio_ip) != 1)
+			goto response_parse_failure;
+		if (inet_pton(AF_INET6, r->audio_ip, &ip_test) != 1)
+			goto response_parse_failure;
+	} else {
+		/* 15 = INET_ADDRSTRLEN -1 */
+		if (sscanf(line, "%15s", r->audio_ip) != 1)
+			goto response_parse_failure;
+		if (inet_pton(AF_INET, r->audio_ip, &ip_test) != 1)
+			goto response_parse_failure;
+	}
 	return 0;
 
 response_parse_failure:
@@ -735,6 +751,8 @@ struct mgcp_client *mgcp_client_init(void *ctx,
 	struct mgcp_client *mgcp;
 
 	mgcp = talloc_zero(ctx, struct mgcp_client);
+	if (!mgcp)
+		return NULL;
 
 	INIT_LLIST_HEAD(&mgcp->responses_pending);
 	INIT_LLIST_HEAD(&mgcp->inuse_endpoints);
@@ -776,7 +794,7 @@ static int init_socket(struct mgcp_client *mgcp)
 
 		/* Initalize socket with the currently configured port
 		 * number */
-		rc = osmo_sock_init2_ofd(&wq->bfd, AF_INET, SOCK_DGRAM, IPPROTO_UDP, mgcp->actual.local_addr,
+		rc = osmo_sock_init2_ofd(&wq->bfd, AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, mgcp->actual.local_addr,
 					 mgcp->actual.local_port, mgcp->actual.remote_addr, mgcp->actual.remote_port,
 					 OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
 		if (rc > 0)
@@ -805,7 +823,6 @@ static int init_socket(struct mgcp_client *mgcp)
  *  \returns 0 on success, -EINVAL on error. */
 int mgcp_client_connect(struct mgcp_client *mgcp)
 {
-	struct sockaddr_in addr;
 	struct osmo_wqueue *wq;
 	int rc;
 
@@ -815,6 +832,11 @@ int mgcp_client_connect(struct mgcp_client *mgcp)
 	}
 
 	wq = &mgcp->wq;
+	osmo_wqueue_init(wq, 1024);
+	wq->read_cb = mgcp_do_read;
+	wq->write_cb = mgcp_do_write;
+
+	osmo_fd_setup(&wq->bfd, -1, OSMO_FD_READ, osmo_wqueue_bfd_cb, mgcp, 0);
 
 	rc = init_socket(mgcp);
 	if (rc < 0) {
@@ -825,14 +847,6 @@ int mgcp_client_connect(struct mgcp_client *mgcp)
 		goto error_close_fd;
 	}
 
-	inet_aton(mgcp->actual.remote_addr, &addr.sin_addr);
-	mgcp->remote_addr = htonl(addr.sin_addr.s_addr);
-
-	osmo_wqueue_init(wq, 10);
-	wq->bfd.when = BSC_FD_READ;
-	wq->bfd.data = mgcp;
-	wq->read_cb = mgcp_do_read;
-	wq->write_cb = mgcp_do_write;
 
 	LOGP(DLMGCP, LOGL_INFO, "MGCP GW connection: %s\n", osmo_sock_get_name2(wq->bfd.fd));
 
@@ -859,12 +873,13 @@ uint16_t mgcp_client_remote_port(struct mgcp_client *mgcp)
 	return mgcp->actual.remote_port;
 }
 
-/*! Get the IP-Aaddress of the associated MGW as its numeric representation.
+/*! Get the IP-Address of the associated MGW as its numeric representation.
+ *  DEPRECATED, DON'T USE.
  *  \param[in] mgcp MGCP client descriptor.
  *  \returns IP-Address as 32 bit integer (network byte order) */
 uint32_t mgcp_client_remote_addr_n(struct mgcp_client *mgcp)
 {
-	return mgcp->remote_addr;
+	return 0;
 }
 
 /* To compose endpoint names, usually for CRCX, use this as domain name.
@@ -892,11 +907,66 @@ static const char *_mgcp_client_name_append_domain(const struct mgcp_client *mgc
 	return endpoint;
 }
 
+/*! Compose endpoint name for a wildcarded request to the virtual trunk
+ *  \param[in] mgcp MGCP client descriptor.
+ *  \returns string containing the endpoint name (e.g. rtpbridge\*@mgw) */
 const char *mgcp_client_rtpbridge_wildcard(const struct mgcp_client *mgcp)
 {
 	return _mgcp_client_name_append_domain(mgcp, "rtpbridge/*");
 }
 
+/*! Compose endpoint name for an E1 endpoint.
+ *  \param[in] ctx talloc context.
+ *  \param[in] mgcp MGCP client descriptor.
+ *  \param[in] trunk_id id number of the E1 trunk (1-64).
+ *  \param[in] ts timeslot on the E1 trunk (1-31).
+ *  \param[in] rate bitrate used on the E1 trunk (e.g 16 for 16kbit).
+ *  \param[in] offset bit offset of the E1 subslot (e.g. 4 for the third 16k subslot).
+ *  \returns string containing the endpoint name (e.g. ds/e1-1/s-1/su16-4). */
+const char *mgcp_client_e1_epname(void *ctx, const struct mgcp_client *mgcp, uint8_t trunk_id, uint8_t ts,
+				  uint8_t rate, uint8_t offset)
+{
+	/* See also comment in libosmo-mgcp, mgcp_client.c, gen_e1_epname() */
+	const uint8_t valid_rates[] = { 64, 32, 32, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8 };
+	const uint8_t valid_offsets[] = { 0, 0, 4, 0, 2, 4, 6, 0, 1, 2, 3, 4, 5, 6, 7 };
+
+	uint8_t i;
+	bool rate_offs_valid = false;
+	char *epname;
+
+	epname =
+	    talloc_asprintf(ctx, "ds/e1-%u/s-%u/su%u-%u@%s", trunk_id, ts, rate, offset,
+			    mgcp_client_endpoint_domain(mgcp));
+	if (!epname) {
+		LOGP(DLMGCP, LOGL_ERROR, "Cannot compose MGCP e1-endpoint name!\n");
+		return NULL;
+	}
+
+	/* Check if the supplied rate/offset pair resembles a valid combination */
+	for (i = 0; i < sizeof(valid_rates); i++) {
+		if (valid_rates[i] == rate && valid_offsets[i] == offset)
+			rate_offs_valid = true;
+	}
+	if (!rate_offs_valid) {
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "Cannot compose MGCP e1-endpoint name (%s), rate(%u)/offset(%u) combination is invalid!\n", epname,
+		     rate, offset);
+		talloc_free(epname);
+		return NULL;
+	}
+
+	/* An E1 line has a maximum of 32 timeslots, while the first (ts=0) is
+	 * reserverd for framing and alignment, so we can not use it here. */
+	if (ts == 0 || ts > 31) {
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "Cannot compose MGCP e1-endpoint name (%s), E1-timeslot number (%u) is invalid!\n", epname, ts);
+		talloc_free(epname);
+		return NULL;
+	}
+
+	return epname;
+}
+
 struct mgcp_response_pending * mgcp_client_pending_add(
 					struct mgcp_client *mgcp,
 					mgcp_trans_id_t trans_id,
@@ -906,6 +976,9 @@ struct mgcp_response_pending * mgcp_client_pending_add(
 	struct mgcp_response_pending *pending;
 
 	pending = talloc_zero(mgcp, struct mgcp_response_pending);
+	if (!pending)
+		return NULL;
+
 	pending->trans_id = trans_id;
 	pending->response_cb = response_cb;
 	pending->priv = priv;
@@ -925,7 +998,7 @@ struct mgcp_response_pending * mgcp_client_pending_add(
 int mgcp_client_tx(struct mgcp_client *mgcp, struct msgb *msg,
 		   mgcp_response_cb_t response_cb, void *priv)
 {
-	struct mgcp_response_pending *pending;
+	struct mgcp_response_pending *pending = NULL;
 	mgcp_trans_id_t trans_id;
 	int rc;
 
@@ -937,7 +1010,14 @@ int mgcp_client_tx(struct mgcp_client *mgcp, struct msgb *msg,
 		return -EINVAL;
 	}
 
-	pending = mgcp_client_pending_add(mgcp, trans_id, response_cb, priv);
+	/* Do not allocate a dummy 'mgcp_response_pending' entry */
+	if (response_cb != NULL) {
+		pending = mgcp_client_pending_add(mgcp, trans_id, response_cb, priv);
+		if (!pending) {
+			talloc_free(msg);
+			return -ENOMEM;
+		}
+	}
 
 	if (msgb_l2len(msg) > 4096) {
 		LOGP(DLMGCP, LOGL_ERROR,
@@ -959,9 +1039,13 @@ int mgcp_client_tx(struct mgcp_client *mgcp, struct msgb *msg,
 	return 0;
 
 mgcp_tx_error:
+	if (!pending)
+		return rc;
+	/* Dequeue pending response, it's going to be free()d */
+	llist_del(&pending->entry);
 	/* Pass NULL to response cb to indicate an error */
 	mgcp_client_handle_response(mgcp, pending, NULL);
-	return -1;
+	return rc;
 }
 
 /*! Cancel a pending transaction.
@@ -1050,7 +1134,8 @@ static int add_sdp(struct msgb *msg, struct mgcp_msg *mgcp_msg, struct mgcp_clie
 {
 	unsigned int i;
 	int rc = 0;
-	char local_ip[INET_ADDRSTRLEN];
+	char local_ip[INET6_ADDRSTRLEN];
+	int local_ip_family, audio_ip_family;
 	const char *codec;
 	unsigned int pt;
 
@@ -1067,10 +1152,21 @@ static int add_sdp(struct msgb *msg, struct mgcp_msg *mgcp_msg, struct mgcp_clie
 		msgb_free(msg);
 		return -2;
 	}
+	local_ip_family = osmo_ip_str_type(local_ip);
+	if (local_ip_family == AF_UNSPEC) {
+		msgb_free(msg);
+		return -2;
+	}
+	audio_ip_family = osmo_ip_str_type(mgcp_msg->audio_ip);
+	if (audio_ip_family == AF_UNSPEC) {
+		msgb_free(msg);
+		return -2;
+	}
 
 	/* Add owner/creator (SDP) */
-	rc += msgb_printf(msg, "o=- %x 23 IN IP4 %s\r\n",
-			  mgcp_msg->call_id, local_ip);
+	rc += msgb_printf(msg, "o=- %x 23 IN IP%c %s\r\n", mgcp_msg->call_id,
+			  local_ip_family == AF_INET6 ? '6' : '4',
+			  local_ip);
 
 	/* Add session name (none) */
 	rc += msgb_printf(msg, "s=-\r\n");
@@ -1088,7 +1184,9 @@ static int add_sdp(struct msgb *msg, struct mgcp_msg *mgcp_msg, struct mgcp_clie
 		msgb_free(msg);
 		return -2;
 	}
-	rc += msgb_printf(msg, "c=IN IP4 %s\r\n", mgcp_msg->audio_ip);
+	rc += msgb_printf(msg, "c=IN IP%c %s\r\n",
+			  audio_ip_family == AF_INET6 ? '6' : '4',
+			  mgcp_msg->audio_ip);
 
 	/* Add time description, active time (SDP) */
 	rc += msgb_printf(msg, "t=0 0\r\n");
@@ -1206,6 +1304,7 @@ struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg)
 			     "Endpoint name (%s) lacks separator (@), can not generate MGCP message\n",
 			     mgcp_msg->endpoint);
 			msgb_free(msg);
+			return NULL;
 		}
 
 		rc += msgb_printf(msg, " %s", mgcp_msg->endpoint);

src/libosmo-mgcp-client/mgcp_client_endpoint_fsm.c

@@ -27,6 +27,7 @@
 #include <osmocom/core/fsm.h>
 #include <osmocom/core/byteswap.h>
 #include <osmocom/core/tdef.h>
+#include <osmocom/core/sockaddr_str.h>
 
 #include <osmocom/mgcp_client/mgcp_client_endpoint_fsm.h>
 
@@ -235,8 +236,6 @@ static void fill_event_names()
 	}
 }
 
-/* T_defs is used to obtain an (Osmocom specific) T2427001: timeout for an MGCP response (note, 2427 corresponds to the
- * default MGCP port in osmo-mgw). */
 static __attribute__((constructor)) void osmo_mgcpc_ep_fsm_init()
 {
 	OSMO_ASSERT(osmo_fsm_register(&osmo_mgcpc_ep_fsm) == 0);
@@ -468,14 +467,12 @@ static void on_success(struct osmo_mgcpc_ep_ci *ci, void *data)
 
 	ci->pending = false;
 
+	rtp_info = data;
+
 	switch (ci->verb) {
 	case MGCP_VERB_CRCX:
 		/* If we sent a wildcarded endpoint name on CRCX, we need to store the resulting endpoint
 		 * name here. Also, we receive the MGW's RTP port information. */
-		rtp_info = data;
-		OSMO_ASSERT(rtp_info);
-		ci->got_port_info = true;
-		ci->rtp_info = *rtp_info;
 		osmo_strlcpy(ci->mgcp_ci_str, mgcp_conn_get_ci(ci->mgcp_client_fi),
 			sizeof(ci->mgcp_ci_str));
 		if (rtp_info->endpoint[0]) {
@@ -485,6 +482,15 @@ static void on_success(struct osmo_mgcpc_ep_ci *ci, void *data)
 				return;
 		}
 		ci->ep->first_crcx_complete = true;
+		OSMO_ASSERT(rtp_info);
+		/* fall through */
+	case MGCP_VERB_MDCX:
+		/* Always update the received RTP ip/port information, since MGW
+		 * may provide new one after remote end params changed */
+		if (rtp_info) {
+			ci->got_port_info = true;
+			ci->rtp_info = *rtp_info;
+		}
 		break;
 
 	default:
@@ -517,17 +523,33 @@ const struct mgcp_conn_peer *osmo_mgcpc_ep_ci_get_rtp_info(const struct osmo_mgc
 bool osmo_mgcpc_ep_ci_get_crcx_info_to_sockaddr(const struct osmo_mgcpc_ep_ci *ci, struct sockaddr_storage *dest)
 {
 	const struct mgcp_conn_peer *rtp_info;
+	int family;
 	struct sockaddr_in *sin;
+	struct sockaddr_in6 *sin6;
 
 	rtp_info = osmo_mgcpc_ep_ci_get_rtp_info(ci);
 	if (!rtp_info)
 		return false;
 
-        sin = (struct sockaddr_in *)dest;
-
-        sin->sin_family = AF_INET;
-        sin->sin_addr.s_addr = inet_addr(rtp_info->addr);
-        sin->sin_port = osmo_ntohs(rtp_info->port);
+	family = osmo_ip_str_type(rtp_info->addr);
+	switch (family) {
+	case AF_INET:
+		sin = (struct sockaddr_in *)dest;
+		sin->sin_family = AF_INET;
+		sin->sin_port = osmo_ntohs(rtp_info->port);
+		if (inet_pton(AF_INET, rtp_info->addr, &sin->sin_addr) != 1)
+			return false;
+		break;
+	case AF_INET6:
+		sin6 = (struct sockaddr_in6 *)dest;
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = osmo_ntohs(rtp_info->port);
+		if (inet_pton(AF_INET6, rtp_info->addr, &sin6->sin6_addr) != 1)
+			return false;
+		break;
+	default:
+		return false;
+	}
 	return true;
 }
 
@@ -547,7 +569,7 @@ bool osmo_mgcpc_ep_ci_get_crcx_info_to_osmux_cid(const struct osmo_mgcpc_ep_ci *
 }
 
 static const struct osmo_tdef_state_timeout osmo_mgcpc_ep_fsm_timeouts[32] = {
-	[OSMO_MGCPC_EP_ST_WAIT_MGW_RESPONSE] = { .T=2427001 },
+	[OSMO_MGCPC_EP_ST_WAIT_MGW_RESPONSE] = { .T=-2427 },
 };
 
 /* Transition to a state, using the T timer defined in assignment_fsm_timeouts.

src/libosmo-mgcp-client/mgcp_client_fsm.c

@@ -25,6 +25,7 @@
 #include <osmocom/core/byteswap.h>
 #include <arpa/inet.h>
 #include <osmocom/core/logging.h>
+#include <osmocom/core/sockaddr_str.h>
 
 /* Context information, this is attached to the priv pointer of the FSM and
  * is also handed back when dispatcheing events to the parent FSM. This is
@@ -522,8 +523,8 @@ static void fsm_cleanup_cb(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause ca
 	 * connection. This is not the normal case. The user should always use
 	 * mgcp_conn_delete() to instruct the FSM to perform a graceful exit */
 	if (strlen(mgcp_ctx->conn_id)) {
-		LOGPFSML(fi, LOGL_ERROR,
-			 "MGW/DLCX: abrupt FSM termination with connections still present, sending unconditional DLCX...\n");
+		LOGPFSML(fi, LOGL_NOTICE,
+			 "MGW/DLCX: FSM termination with connections still present, sending unconditional DLCX...\n");
 		msg = make_dlcx_msg(mgcp_ctx);
 		if (!msg)
 			LOGPFSML(fi, LOGL_ERROR, "MGW/DLCX: Error composing DLCX message\n");
@@ -607,14 +608,16 @@ struct osmo_fsm_inst *mgcp_conn_create(struct mgcp_client *mgcp, struct osmo_fsm
 {
 	struct mgcp_ctx *mgcp_ctx;
 	struct osmo_fsm_inst *fi;
-	struct in_addr ip_test;
+	struct in6_addr ip_test;
+
 
 	OSMO_ASSERT(parent_fi);
 	OSMO_ASSERT(mgcp);
 	OSMO_ASSERT(conn_peer);
 
 	/* Check if IP/Port information in conn info makes sense */
-	if (conn_peer->port && inet_aton(conn_peer->addr, &ip_test) == 0)
+	if (conn_peer->port && inet_pton(osmo_ip_str_type(conn_peer->addr),
+					 conn_peer->addr, &ip_test) != 1)
 		return NULL;
 
 	/* Allocate and configure a new fsm instance */
@@ -644,7 +647,7 @@ int mgcp_conn_modify(struct osmo_fsm_inst *fi, uint32_t parent_evt, struct mgcp_
 {
 	OSMO_ASSERT(fi);
 	struct mgcp_ctx *mgcp_ctx = fi->priv;
-	struct in_addr ip_test;
+	struct in6_addr ip_test;
 
 	OSMO_ASSERT(mgcp_ctx);
 	OSMO_ASSERT(conn_peer);
@@ -668,8 +671,8 @@ int mgcp_conn_modify(struct osmo_fsm_inst *fi, uint32_t parent_evt, struct mgcp_
 		LOGPFSML(fi, LOGL_ERROR, "Cannot MDCX, port == 0\n");
 		return -EINVAL;
 	}
-	if (inet_aton(conn_peer->addr, &ip_test) == 0) {
-		LOGPFSML(fi, LOGL_ERROR, "Cannot MDCX, IP address == 0.0.0.0\n");
+	if (inet_pton(osmo_ip_str_type(conn_peer->addr), conn_peer->addr, &ip_test) != 1) {
+		LOGPFSML(fi, LOGL_ERROR, "Cannot MDCX, IP address %s\n", conn_peer->addr);
 		return -EINVAL;
 	}
 

src/libosmo-mgcp-client/mgcp_client_vty.c

@@ -36,9 +36,10 @@ void *global_mgcp_client_ctx = NULL;
 struct mgcp_client_conf *global_mgcp_client_conf = NULL;
 
 DEFUN(cfg_mgw_local_ip, cfg_mgw_local_ip_cmd,
-      "mgw local-ip A.B.C.D",
+      "mgw local-ip " VTY_IPV46_CMD,
       MGW_STR "local bind to connect to MGW from\n"
-      "local bind IP address\n")
+      "local bind IPv4 address\n"
+      "local bind IPv6 address\n")
 {
 	if (!global_mgcp_client_conf)
 		return CMD_ERR_NOTHING_TODO;
@@ -69,9 +70,10 @@ ALIAS_DEPRECATED(cfg_mgw_local_port, cfg_mgcpgw_local_port_cmd,
 		 "local bind port\n")
 
 DEFUN(cfg_mgw_remote_ip, cfg_mgw_remote_ip_cmd,
-      "mgw remote-ip A.B.C.D",
+      "mgw remote-ip " VTY_IPV46_CMD,
       MGW_STR "remote IP address to reach the MGW at\n"
-      "remote IP address\n")
+      "remote IPv4 address\n"
+      "remote IPv6 address\n")
 {
 	if (!global_mgcp_client_conf)
 		return CMD_ERR_NOTHING_TODO;
@@ -188,21 +190,21 @@ void mgcp_client_vty_init(void *talloc_ctx, int node, struct mgcp_client_conf *c
 	global_mgcp_client_ctx = talloc_ctx;
 	global_mgcp_client_conf = conf;
 
-	install_element(node, &cfg_mgw_local_ip_cmd);
-	install_element(node, &cfg_mgw_local_port_cmd);
-	install_element(node, &cfg_mgw_remote_ip_cmd);
-	install_element(node, &cfg_mgw_remote_port_cmd);
-	install_element(node, &cfg_mgw_endpoint_range_cmd);
-	install_element(node, &cfg_mgw_rtp_bts_base_port_cmd);
-	install_element(node, &cfg_mgw_endpoint_domain_name_cmd);
+	install_lib_element(node, &cfg_mgw_local_ip_cmd);
+	install_lib_element(node, &cfg_mgw_local_port_cmd);
+	install_lib_element(node, &cfg_mgw_remote_ip_cmd);
+	install_lib_element(node, &cfg_mgw_remote_port_cmd);
+	install_lib_element(node, &cfg_mgw_endpoint_range_cmd);
+	install_lib_element(node, &cfg_mgw_rtp_bts_base_port_cmd);
+	install_lib_element(node, &cfg_mgw_endpoint_domain_name_cmd);
 
 	/* deprecated 'mgcpgw' commands */
-	install_element(node, &cfg_mgcpgw_local_ip_cmd);
-	install_element(node, &cfg_mgcpgw_local_port_cmd);
-	install_element(node, &cfg_mgcpgw_remote_ip_cmd);
-	install_element(node, &cfg_mgcpgw_remote_port_cmd);
-	install_element(node, &cfg_mgcpgw_endpoint_range_cmd);
-	install_element(node, &cfg_mgcpgw_rtp_bts_base_port_cmd);
+	install_lib_element(node, &cfg_mgcpgw_local_ip_cmd);
+	install_lib_element(node, &cfg_mgcpgw_local_port_cmd);
+	install_lib_element(node, &cfg_mgcpgw_remote_ip_cmd);
+	install_lib_element(node, &cfg_mgcpgw_remote_port_cmd);
+	install_lib_element(node, &cfg_mgcpgw_endpoint_range_cmd);
+	install_lib_element(node, &cfg_mgcpgw_rtp_bts_base_port_cmd);
 
 	osmo_fsm_vty_add_cmds();
 }

src/libosmo-mgcp/Makefile.am

@@ -10,6 +10,8 @@ AM_CFLAGS = \
 	$(LIBOSMOGSM_CFLAGS) \
 	$(LIBOSMOVTY_CFLAGS) \
 	$(LIBOSMONETIF_CFLAGS) \
+	$(LIBOSMOABIS_CFLAGS) \
+	$(LIBOSMOTRAU_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
 	$(NULL)
 
@@ -18,6 +20,8 @@ AM_LDFLAGS = \
 	$(LIBOSMOGSM_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBOSMONETIF_LIBS) \
+	$(LIBOSMOABIS_LIBS) \
+	$(LIBOSMOTRAU_LIBS) \
 	$(COVERAGE_LDFLAGS) \
 	$(NULL)
 
@@ -40,4 +44,8 @@ libosmo_mgcp_a_SOURCES = \
 	mgcp_conn.c \
 	mgcp_stat.c \
 	mgcp_endp.c \
+	mgcp_trunk.c \
+	mgcp_ctrl.c \
+	mgcp_ratectr.c \
+	mgcp_e1.c \
 	$(NULL)

src/libosmo-mgcp/mgcp_codec.c

@@ -17,8 +17,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/osmux.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
+#include <osmocom/mgcp/mgcp_codec.h>
 #include <errno.h>
 
 /* Helper function to dump codec information of a specified codec to a printable
@@ -279,36 +284,16 @@ error:
  * Helper function for mgcp_codec_decide() */
 static bool is_codec_compatible(const struct mgcp_endpoint *endp, const struct mgcp_rtp_codec *codec)
 {
-	char codec_name[64];
-
 	/* A codec name must be set, if not, this might mean that the codec
 	 * (payload type) that was assigned is unknown to us so we must stop
 	 * here. */
 	if (!codec->subtype_name)
 		return false;
 
-	/* We now extract the codec_name (letters before the /, e.g. "GSM"
-	 * from the audio name that is stored in the trunk configuration.
-	 * We do not compare to the full audio_name because we expect that
-	 * "GSM", "GSM/8000" and "GSM/8000/1" are all compatible when the
-	 * audio name of the codec is set to "GSM" */
-	if (sscanf(endp->tcfg->audio_name, "%63[^/]/%*d/%*d", codec_name) < 1)
-		return false;
+	/* FIXME: implement meaningful checks to make sure that the given codec
+	 * is compatible with the given endpoint */
 
-	/* Finally we check if the subtype_name we have generated from the
-	 * audio_name in the trunc struct patches the codec_name of the
-	 * given codec */
-	if (strcasecmp(codec_name, codec->subtype_name) == 0)
-		return true;
-
-	/* FIXME: It is questinable that the method to pick a compatible
-	 * codec can work properly. Since this useses tcfg->audio_name, as
-	 * a reference, which is set to "AMR/8000" permanently.
-	 * tcfg->audio_name must be updated by the first connection that
-	 * has been made on an endpoint, so that the second connection
-	 * can make a meaningful decision here */
-
-	return false;
+	return true;
 }
 
 /*! Decide for one suitable codec
@@ -335,7 +320,7 @@ int mgcp_codec_decide(struct mgcp_conn_rtp *conn)
 	for (i = 0; i < rtp->codecs_assigned; i++) {
 		/* When no transcoding is available, avoid codecs that would
 		 * require transcoding. */
-		if (endp->tcfg->no_audio_transcoding && !is_codec_compatible(endp, &rtp->codecs[i])) {
+		if (endp->trunk->no_audio_transcoding && !is_codec_compatible(endp, &rtp->codecs[i])) {
 			LOGP(DLMGCP, LOGL_NOTICE, "transcoding not available, skipping codec: %d/%s\n",
 			     rtp->codecs[i].payload_type, rtp->codecs[i].subtype_name);
 			continue;
@@ -451,3 +436,28 @@ int mgcp_codec_pt_translate(struct mgcp_conn_rtp *conn_src, struct mgcp_conn_rtp
 
 	return codec_dst->payload_type;
 }
+
+/* Find the payload type number configured for a specific codec by SDP.
+ * For example, IuUP gets assigned a payload type number, and the endpoint needs to translate that to the number
+ * assigned to "AMR" on the other conn (by a=rtpmap:N).
+ * \param conn  The side of an endpoint to get the payload type number for (to translate the payload type number to).
+ * \param subtype_name  SDP codec name without parameters (e.g. "AMR").
+ * \param match_nr  Index for the match found, first being match_nr == 0. Iterate all matches by calling multiple times
+ *                  with incrementing match_nr.
+ * \return codec definition for that conn matching the subtype_name, or NULL if no such match_nr is found.
+ */
+const struct mgcp_rtp_codec *mgcp_codec_pt_find_by_subtype_name(struct mgcp_conn_rtp *conn,
+								const char *subtype_name, unsigned int match_nr)
+{
+	int i;
+	for (i = 0; i < conn->end.codecs_assigned; i++) {
+		if (!strcmp(conn->end.codecs[i].subtype_name, subtype_name)) {
+			if (match_nr) {
+				match_nr--;
+				continue;
+			}
+			return &conn->end.codecs[i];
+		}
+	}
+	return NULL;
+}

src/libosmo-mgcp/mgcp_conn.c

@@ -22,9 +22,11 @@
  */
 
 #include <osmocom/mgcp/mgcp_conn.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp_network.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_common.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
 #include <osmocom/mgcp/mgcp_sdp.h>
 #include <osmocom/mgcp/mgcp_codec.h>
 #include <osmocom/gsm/gsm_utils.h>
@@ -197,7 +199,7 @@ struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
 	/* Initialize watchdog */
 	osmo_timer_setup(&conn->watchdog, mgcp_conn_watchdog_cb, conn);
 	mgcp_conn_watchdog_kick(conn);
-	llist_add(&conn->entry, &endp->conns);
+	mgcp_endp_add_conn(endp, conn);
 
 	return conn;
 }
@@ -254,12 +256,10 @@ struct mgcp_conn_rtp *mgcp_conn_get_rtp(struct mgcp_endpoint *endp,
 	return NULL;
 }
 
-static void
-aggregate_rtp_conn_stats(struct mgcp_trunk_config *trunk, struct mgcp_conn_rtp *conn_rtp)
+static void aggregate_rtp_conn_stats(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn_rtp)
 {
-	struct rate_ctr_group *all_stats = trunk->all_rtp_conn_stats;
+	struct rate_ctr_group *all_stats = endp->trunk->ratectr.all_rtp_conn_stats;
 	struct rate_ctr_group *conn_stats = conn_rtp->rate_ctr_group;
-	int i;
 
 	if (all_stats == NULL || conn_stats == NULL)
 		return;
@@ -269,8 +269,11 @@ aggregate_rtp_conn_stats(struct mgcp_trunk_config *trunk, struct mgcp_conn_rtp *
 	 * All other counters in both counter groups correspond to each other. */
 	OSMO_ASSERT(conn_stats->desc->num_ctr + 1 == all_stats->desc->num_ctr);
 
-	for (i = 0; i < conn_stats->desc->num_ctr; i++)
-		rate_ctr_add(&all_stats->ctr[i], conn_stats->ctr[i].current);
+	/* all other counters are [now] updated in real-time */
+	rate_ctr_add(&all_stats->ctr[IN_STREAM_ERR_TSTMP_CTR],
+		     conn_stats->ctr[IN_STREAM_ERR_TSTMP_CTR].current);
+	rate_ctr_add(&all_stats->ctr[OUT_STREAM_ERR_TSTMP_CTR],
+		     conn_stats->ctr[OUT_STREAM_ERR_TSTMP_CTR].current);
 
 	rate_ctr_inc(&all_stats->ctr[RTP_NUM_CONNECTIONS]);
 }
@@ -286,15 +289,9 @@ void mgcp_conn_free(struct mgcp_endpoint *endp, const char *id)
 	if (!conn)
 		return;
 
-	/* Run endpoint cleanup action. By this we inform the endpoint about
-	 * the removal of the connection and allow it to clean up its inner
-	 * state accordingly */
-	if (endp->type->cleanup_cb)
-		endp->type->cleanup_cb(endp, conn);
-
 	switch (conn->type) {
 	case MGCP_CONN_TYPE_RTP:
-		aggregate_rtp_conn_stats(endp->tcfg, &conn->u.rtp);
+		aggregate_rtp_conn_stats(endp, &conn->u.rtp);
 		mgcp_rtp_conn_cleanup(&conn->u.rtp);
 		break;
 	default:
@@ -305,7 +302,8 @@ void mgcp_conn_free(struct mgcp_endpoint *endp, const char *id)
 	}
 
 	osmo_timer_del(&conn->watchdog);
-	llist_del(&conn->entry);
+	mgcp_endp_remove_conn(endp, conn);
+	/* WARN: endp may have be freed after call to mgcp_endp_remove_conn */
 	talloc_free(conn);
 }
 
@@ -346,6 +344,7 @@ void mgcp_conn_free_all(struct mgcp_endpoint *endp)
 char *mgcp_conn_dump(struct mgcp_conn *conn)
 {
 	static char str[sizeof(conn->name)+sizeof(conn->id)+256];
+	char ipbuf[INET6_ADDRSTRLEN];
 
 	if (!conn) {
 		snprintf(str, sizeof(str), "(null connection)");
@@ -359,7 +358,7 @@ char *mgcp_conn_dump(struct mgcp_conn *conn)
 			 "rtp:%u rtcp:%u)",
 			 conn->name,
 			 conn->id,
-			 inet_ntoa(conn->u.rtp.end.addr),
+			 osmo_sockaddr_ntop(&conn->u.rtp.end.addr.u.sa, ipbuf),
 			 ntohs(conn->u.rtp.end.rtp_port),
 			 ntohs(conn->u.rtp.end.rtcp_port));
 		break;
@@ -395,3 +394,13 @@ struct mgcp_conn *mgcp_find_dst_conn(struct mgcp_conn *conn)
 
 	return NULL;
 }
+
+/*! get oldest connection in the list.
+ *  \param[in] endp associated endpoint */
+struct mgcp_conn *mgcp_conn_get_oldest(struct mgcp_endpoint *endp)
+{
+	if (llist_empty(&endp->conns))
+		return NULL;
+
+	return llist_last_entry(&endp->conns, struct mgcp_conn, entry);
+}

src/libosmo-mgcp/mgcp_ctrl.c

@@ -0,0 +1,36 @@
+/*
+ * (C) 2020 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <osmocom/ctrl/control_if.h>
+#include <osmocom/mgcp/mgcp.h>
+
+
+static int mgw_ctrl_node_lookup(void *data, vector vline, int *node_type,
+				void **node_data, int *i)
+{
+	return 0;
+}
+
+
+struct ctrl_handle *mgw_ctrl_interface_setup(struct mgcp_config *cfg,
+					     const char *bind_addr, uint16_t port)
+{
+	return ctrl_interface_setup_dynip2(cfg, bind_addr, port, mgw_ctrl_node_lookup,
+					   _LAST_CTRL_NODE);
+}

src/libosmo-mgcp/mgcp_e1.c

@@ -0,0 +1,685 @@
+/* E1 traffic handling */
+
+/*
+ * (C) 2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * Author: Philipp Maier
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <inttypes.h>
+
+#include <osmocom/mgcp/mgcp_protocol.h>
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/abis/e1_input.h>
+#include <osmocom/abis/abis.h>
+
+#include <osmocom/trau/trau_sync.h>
+#include <osmocom/trau/trau_frame.h>
+#include <osmocom/trau/trau_rtp.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/netif/rtp.h>
+#include <osmocom/mgcp/debug.h>
+#include <osmocom/mgcp/mgcp_e1.h>
+#include <osmocom/codec/codec.h>
+
+#define DEBUG_BITS_MAX 80
+#define DEBUG_BYTES_MAX 40
+#define DEBUG_E1_TS 0
+#define E1_TS_BYTES 160
+#define E1_TRAU_BITS 320
+#define E1_TRAU_BITS_MSGB 2048
+
+static struct mgcp_config *cfg;
+
+static const struct e1inp_line_ops dummy_e1_line_ops = {
+	.sign_link_up = NULL,
+	.sign_link_down = NULL,
+	.sign_link = NULL,
+};
+
+/* EFR idle frame */
+static const ubit_t idle_tf_efr[] = { 0, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 1, 1, 0, 1, 0, 0, 0,
+				      0, 0, 0, 0, 1, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 0, 0,
+				      0, 0, 0, 0, 0, 0, 0, 0,
+				      1, 0, 0, 0, 0, 0, 1, 0,
+				      1, 1, 1, 1, 1, 1, 1, 1,
+};
+
+/* FR idle frame */
+static const ubit_t idle_tf_fr[] = { 0, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 1, 1, 1, 0, 0, 0, 0,
+				     0, 0, 0, 0, 1, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     1, 0, 0, 0, 0, 0, 1, 0,
+				     1, 1, 1, 1, 1, 1, 1, 1,
+};
+
+/* Idle speech frame, see also GSM 08.60, chapter 3.4 */
+static const ubit_t idle_tf_spch[] = { 0, 0, 0, 0, 0, 0, 0, 0,
+				       0, 0, 0, 0, 0, 0, 0, 0,
+				       1, 0, 1, 1, 1, 0, 0, 0,
+				       0, 0, 0, 0, 1, 0, 0, 0,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+				       1, 1, 1, 1, 1, 1, 1, 0,
+				       1, 1, 1, 1, 1, 1, 1, 1,
+};
+
+/* If the RTP transmission has dropouts for some reason the I.460 TX-Queue may
+ * run empty. In order to make sure that the TRAU frame transmission continues
+ * we generate idle TRAU frames here. */
+static void e1_i460_mux_empty_cb(struct osmo_i460_subchan *schan, void *user_data)
+{
+	struct mgcp_endpoint *endp = user_data;
+	struct rate_ctr_group *rate_ctrs = endp->trunk->ratectr.e1_stats;
+	struct msgb *msg = msgb_alloc(E1_TRAU_BITS_MSGB, "E1-I.460-IDLE-TX-TRAU-frame");
+	uint8_t *ptr;
+	const uint8_t *ptr_ft;
+	enum osmo_trau_frame_type ft;
+
+	rate_ctr_inc(&rate_ctrs->ctr[E1_I460_TRAU_MUX_EMPTY_CTR]);
+
+	/* Choose an appropiate idle frame type */
+	ft = endp->e1.trau_rtp_st->type;
+	switch (ft) {
+	case OSMO_TRAU16_FT_FR:
+		ptr_ft = idle_tf_fr;
+		break;
+	case OSMO_TRAU16_FT_EFR:
+		ptr_ft = idle_tf_efr;
+		break;
+	default:
+		/* FIXME: What about 8k subslots and AMR frames? */
+		ptr_ft = idle_tf_spch;
+	}
+
+	/* Put the replacement into a message buffer and enqueue it into the
+	 * I.460 multiplexer */
+	ptr = msgb_put(msg, E1_TRAU_BITS);
+	memcpy(ptr, ptr_ft, E1_TRAU_BITS);
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-IDLE-TX: enquing %u trau frame bits: %s...\n", msgb_length(msg),
+		 osmo_ubit_dump(msgb_data(msg), msgb_length(msg) > DEBUG_BITS_MAX ? DEBUG_BITS_MAX : msgb_length(msg)));
+	osmo_i460_mux_enqueue(endp->e1.schan, msg);
+}
+
+/* called by I.460 de-multeiplexer; feed output of I.460 demux into TRAU frame sync */
+static void e1_i460_demux_bits_cb(struct osmo_i460_subchan *schan, void *user_data, const ubit_t *bits,
+				  unsigned int num_bits)
+{
+	struct mgcp_endpoint *endp = user_data;
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: receiving %u bits from subslot: %s...\n", num_bits,
+		 osmo_ubit_dump(bits, num_bits > DEBUG_BITS_MAX ? DEBUG_BITS_MAX : num_bits));
+
+	OSMO_ASSERT(endp->e1.trau_sync_fi);
+	osmo_trau_sync_rx_ubits(endp->e1.trau_sync_fi, bits, num_bits);
+}
+
+/* called for each synchronized TRAU frame received; decode frame + convert to RTP
+ * (the resulting frame will be prepended with an all-zero (12-byte) rtp header) */
+static void sync_frame_out_cb(void *user_data, const ubit_t *bits, unsigned int num_bits)
+{
+	struct msgb *msg = msgb_alloc(RTP_BUF_SIZE, "RTP-rx-from-E1");
+	unsigned int rtp_hdr_len = sizeof(struct rtp_hdr);
+	struct mgcp_endpoint *endp = user_data;
+	struct rate_ctr_group *rate_ctrs = endp->trunk->ratectr.e1_stats;
+	struct mgcp_conn *conn_dst;
+	struct osmo_trau_frame fr;
+	int rc;
+
+	if (!bits || num_bits == 0)
+		goto skip;
+
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: receiving %u TRAU frame bits from E1 subslot: %s...\n",
+		 num_bits, osmo_ubit_dump(bits, num_bits > DEBUG_BITS_MAX ? DEBUG_BITS_MAX : num_bits));
+
+	/* Decode TRAU frame */
+	switch (endp->e1.scd.rate) {
+	case OSMO_I460_RATE_8k:
+		LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: decoding 8k trau frame...\n");
+		rc = osmo_trau_frame_decode_8k(&fr, bits, OSMO_TRAU_DIR_UL);
+		break;
+	case OSMO_I460_RATE_16k:
+		LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: decoding 16k trau frame...\n");
+		rc = osmo_trau_frame_decode_16k(&fr, bits, OSMO_TRAU_DIR_UL);
+		break;
+	default:
+		/* TRAU frames only exist in 8K or 16K subslots. */
+		OSMO_ASSERT(false);
+		break;
+	}
+	if (rc != 0) {
+		LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: unable to decode trau frame\n");
+		goto skip;
+	}
+
+	/* Check if the payload type is supported and what the expected lenth
+	 * of the RTP payload will be. */
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: decoded trau frame type: %s\n",
+		 osmo_trau_frame_type_name(fr.type));
+
+	/* Convert decoded trau frame to RTP frame */
+	struct osmo_trau2rtp_state t2rs = {
+		.type = fr.type,
+	};
+	rc = osmo_trau2rtp(msgb_data(msg) + rtp_hdr_len, msg->data_len - rtp_hdr_len, &fr, &t2rs);
+	if (rc <= 0) {
+		LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: unable to convert trau frame to RTP audio\n");
+		goto skip;
+	}
+	msgb_put(msg, rtp_hdr_len + rc);
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-RX: encoded %u bytes of RTP audio: %s\n", rc,
+		 osmo_hexdump(msgb_data(msg) + rtp_hdr_len, msgb_length(msg) - rtp_hdr_len));
+
+	/* Forward RTP data to IP */
+	conn_dst = llist_first_entry(&endp->conns, struct mgcp_conn, entry);
+	if (!conn_dst) {
+		LOGPENDP(endp, DE1, LOGL_DEBUG,
+			 "E1-I.460-RX: unable to forward RTP audio data from E1: no connection to forward an incoming RTP packet to\n");
+		goto skip;
+	}
+	OSMO_ASSERT(conn_dst->type == MGCP_CONN_TYPE_RTP);
+
+	mgcp_send(endp, 1, NULL, msg, &conn_dst->u.rtp, &conn_dst->u.rtp);
+
+	msgb_free(msg);
+	return;
+skip:
+	rate_ctr_inc(&rate_ctrs->ctr[E1_I460_TRAU_RX_FAIL_CTR]);
+	msgb_free(msg);
+	return;
+}
+
+/* Function to handle outgoing E1 traffic */
+static void e1_send(struct e1inp_ts *ts, struct mgcp_trunk *trunk)
+{
+	struct msgb *msg = msgb_alloc(E1_TS_BYTES, "E1-TX-timeslot-bytes");
+	uint8_t *ptr;
+
+	/* Get E1 frame from I.460 multiplexer */
+	ptr = msgb_put(msg, E1_TS_BYTES);
+	osmo_i460_mux_out(&trunk->e1.i460_ts[ts->num - 1], ptr, E1_TS_BYTES);
+
+#if DEBUG_E1_TS == 1
+	LOGPTRUNK(trunk, DE1, LOGL_DEBUG, "E1-TX: (ts:%u) sending %u bytes: %s...\n", ts->num, msgb_length(msg),
+		  osmo_hexdump_nospc(msgb_data(msg),
+				     msgb_length(msg) > DEBUG_BYTES_MAX ? DEBUG_BYTES_MAX : msgb_length(msg)));
+#endif
+	/* Hand data over to the E1 stack */
+	msgb_enqueue(&ts->raw.tx_queue, msg);
+	return;
+}
+
+/* Callback function to handle incoming E1 traffic */
+static void e1_recv_cb(struct e1inp_ts *ts, struct msgb *msg)
+{
+	struct mgcp_trunk *trunk;
+
+	/* Find associated trunk */
+	trunk = mgcp_trunk_by_line_num(cfg, ts->line->num);
+	if (!trunk) {
+		LOGP(DE1, LOGL_DEBUG, "E1-RX: unable to find a trunk for E1-line %u!\n", ts->line->num);
+		return;
+	}
+
+	/* Check if the incoming data looks sane */
+	if (msgb_length(msg) != E1_TS_BYTES) {
+		LOGPTRUNK(trunk, DE1, LOGL_NOTICE,
+			  "E1-RX: (ts:%u) expected length is %u, actual length is %u!\n", ts->num, E1_TS_BYTES,
+			  msgb_length(msg));
+	}
+#if DEBUG_E1_TS == 1
+	LOGPTRUNK(trunk, DE1, LOGL_DEBUG, "E1-RX: (ts:%u) receiving %u bytes: %s...\n", ts->num,
+		  msgb_length(msg), osmo_hexdump_nospc(msgb_data(msg),
+						       msgb_length(msg) >
+						       DEBUG_BYTES_MAX ? DEBUG_BYTES_MAX : msgb_length(msg)));
+#endif
+
+	/* Hand data over to the I.460 demultiplexer. */
+	osmo_i460_demux_in(&trunk->e1.i460_ts[ts->num - 1], msgb_data(msg), msgb_length(msg));
+
+	/* Trigger sending of pending E1 traffic */
+	e1_send(ts, trunk);
+}
+
+static int e1_init(struct mgcp_trunk *trunk, uint8_t ts_nr)
+{
+	/*! Each timeslot needs only to be configured once. The Timeslot then
+	 *  stays open and permanently receives data. It is then up to the
+	 *  I.460 demultiplexer to add/remove subchannels as needed. It is
+	 *  allowed to call this function multiple times since we check if the
+	 *  timeslot is already configured. */
+
+	struct e1inp_line *e1_line;
+	int rc;
+
+	OSMO_ASSERT(ts_nr > 0 || ts_nr < NUM_E1_TS);
+	cfg = trunk->cfg;
+
+	if (trunk->e1.ts_in_use[ts_nr - 1]) {
+		LOGPTRUNK(trunk, DE1, LOGL_DEBUG, "E1 timeslot %u already set up, skipping...\n", ts_nr);
+		return 0;
+	}
+
+	/* Get E1 line */
+	e1_line = e1inp_line_find(trunk->e1.vty_line_nr);
+	if (!e1_line) {
+		LOGPTRUNK(trunk, DE1, LOGL_DEBUG, "no such E1 line %u - check VTY config!\n",
+			  trunk->e1.vty_line_nr);
+		return -EINVAL;
+	}
+	e1inp_line_bind_ops(e1_line, &dummy_e1_line_ops);
+
+	/* Configure E1 timeslot */
+	rc = e1inp_ts_config_raw(&e1_line->ts[ts_nr - 1], e1_line, e1_recv_cb);
+	if (rc < 0) {
+		LOGPTRUNK(trunk, DE1, LOGL_ERROR, "failed to put E1 timeslot %u in raw mode.\n", ts_nr);
+		return -EINVAL;
+	}
+	rc = e1inp_line_update(e1_line);
+	if (rc < 0) {
+		LOGPTRUNK(trunk, DE1, LOGL_ERROR, "failed to update E1 timeslot %u.\n", ts_nr);
+		return -EINVAL;
+	}
+
+	LOGPTRUNK(trunk, DE1, LOGL_DEBUG, "E1 timeslot %u set up successfully.\n", ts_nr);
+	trunk->e1.ts_in_use[ts_nr - 1] = true;
+
+	return 0;
+}
+
+/* Determine a suitable TRAU frame type for a given codec */
+static enum osmo_trau_frame_type determine_trau_fr_type(char *sdp_subtype_name, enum osmo_i460_rate i460_rate,
+							uint8_t amr_ft, struct mgcp_endpoint *endp)
+{
+	if (strcmp(sdp_subtype_name, "GSM") == 0)
+		return OSMO_TRAU16_FT_FR;
+	else if (strcmp(sdp_subtype_name, "GSM-EFR") == 0)
+		return OSMO_TRAU16_FT_EFR;
+	else if (strcmp(sdp_subtype_name, "GSM-HR-08") == 0)
+		return OSMO_TRAU16_FT_HR;
+	else if (strcmp(sdp_subtype_name, "AMR") == 0) {
+		if (i460_rate == OSMO_I460_RATE_8k) {
+			switch (amr_ft) {
+			case AMR_4_75:
+			case AMR_5_15:
+			case AMR_5_90:
+				return OSMO_TRAU8_AMR_LOW;
+			case AMR_6_70:
+				return OSMO_TRAU8_AMR_6k7;
+			case AMR_7_40:
+				return OSMO_TRAU8_AMR_7k4;
+			default:
+				LOGPENDP(endp, DE1, LOGL_ERROR,
+					 "E1-TRAU-TX: unsupported or illegal AMR frame type: %u\n", amr_ft);
+				return OSMO_TRAU_FT_NONE;
+			}
+		}
+		return OSMO_TRAU16_FT_AMR;
+	} else {
+		LOGPENDP(endp, DE1, LOGL_ERROR, "E1-TRAU-TX: unsupported or illegal codec subtype name: %s\n",
+			 sdp_subtype_name);
+		return OSMO_TRAU_FT_NONE;
+	}
+}
+
+/* Determine a suitable TRAU frame type for a given codec */
+static enum osmo_tray_sync_pat_id determine_trau_sync_pat(char *sdp_subtype_name, enum osmo_i460_rate i460_rate,
+							  uint8_t amr_ft, struct mgcp_endpoint *endp)
+{
+	if (strcmp(sdp_subtype_name, "GSM") == 0)
+		return OSMO_TRAU_SYNCP_16_FR_EFR;
+	else if (strcmp(sdp_subtype_name, "GSM-EFR") == 0)
+		return OSMO_TRAU_SYNCP_16_FR_EFR;
+	else if (strcmp(sdp_subtype_name, "GSM-HR-08") == 0)
+		return OSMO_TRAU_SYNCP_8_HR;
+	else if (strcmp(sdp_subtype_name, "AMR") == 0) {
+		if (i460_rate == OSMO_I460_RATE_8k) {
+			switch (amr_ft) {
+			case AMR_4_75:
+			case AMR_5_15:
+			case AMR_5_90:
+				return OSMO_TRAU_SYNCP_8_AMR_LOW;
+			case AMR_6_70:
+				return OSMO_TRAU_SYNCP_8_AMR_6K7;
+			case AMR_7_40:
+				return OSMO_TRAU_SYNCP_8_AMR_7K4;
+			default:
+				LOGPENDP(endp, DE1, LOGL_ERROR,
+					 "E1-TRAU-TX: unsupported or illegal AMR frame type: %u\n", amr_ft);
+				return OSMO_TRAU_SYNCP_16_FR_EFR;
+			}
+		}
+		return OSMO_TRAU_SYNCP_16_FR_EFR;
+	} else {
+		LOGPENDP(endp, DE1, LOGL_ERROR, "E1-TRAU-TX: unsupported or illegal codec subtype name: %s\n",
+			 sdp_subtype_name);
+		return OSMO_TRAU_SYNCP_16_FR_EFR;
+	}
+}
+
+/* Find out if a given TRAU frame type is AMR */
+static bool tf_type_is_amr(enum osmo_trau_frame_type ft)
+{
+
+	switch (ft) {
+	case OSMO_TRAU16_FT_AMR:
+	case OSMO_TRAU8_AMR_LOW:
+	case OSMO_TRAU8_AMR_6k7:
+	case OSMO_TRAU8_AMR_7k4:
+		return true;
+	default:
+		return false;
+	}
+}
+
+/* !Equip E1 endpoint with I.460 mux resources.
+ *  \param[in] endp endpoint to equip
+ *  \param[in] ts E1 timeslot number.
+ *  \param[in] ss E1 subslot number.
+ *  \param[in] offset E1 bit offset.
+ *  \returns 0 on success, -EINVAL on error. */
+int mgcp_e1_endp_equip(struct mgcp_endpoint *endp, uint8_t ts, uint8_t ss, uint8_t offs)
+{
+	int rc;
+	enum osmo_tray_sync_pat_id sync_pat_id = OSMO_TRAU_SYNCP_16_FR_EFR;
+
+	OSMO_ASSERT(ts != 0);
+	OSMO_ASSERT(ts != 0xFF);
+	OSMO_ASSERT(ss != 0xFF);
+	OSMO_ASSERT(offs != 0xFF);
+
+	memset(&endp->e1, 0, sizeof(endp->e1));
+
+	endp->e1.last_amr_ft = AMR_4_75;
+
+	/* Set up E1 line / timeslot */
+	rc = e1_init(endp->trunk, ts);
+	if (rc != 0)
+		return -EINVAL;
+
+	/* Set up I.460 mux */
+	switch (e1_rates[ss]) {
+	case 64:
+		endp->e1.scd.rate = OSMO_I460_RATE_64k;
+		endp->e1.scd.demux.num_bits = 160 * 8;
+		break;
+	case 32:
+		endp->e1.scd.rate = OSMO_I460_RATE_32k;
+		endp->e1.scd.demux.num_bits = 80 * 8;
+		break;
+	case 16:
+		endp->e1.scd.rate = OSMO_I460_RATE_16k;
+		endp->e1.scd.demux.num_bits = 40 * 8;
+		sync_pat_id = OSMO_TRAU_SYNCP_16_FR_EFR;
+		break;
+	case 8:
+		endp->e1.scd.rate = OSMO_I460_RATE_8k;
+		endp->e1.scd.demux.num_bits = 20 * 8;
+		sync_pat_id = OSMO_TRAU_SYNCP_8_HR;
+		break;
+	}
+	endp->e1.scd.bit_offset = offs;
+	endp->e1.scd.demux.out_cb_bits = e1_i460_demux_bits_cb;
+	endp->e1.scd.demux.out_cb_bytes = NULL;
+	endp->e1.scd.demux.user_data = endp;
+	endp->e1.scd.mux.in_cb_queue_empty = e1_i460_mux_empty_cb;
+	endp->e1.scd.mux.user_data = endp;
+
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "adding I.460 subchannel: ts=%u, bit_offset=%u, rate=%uk, num_bits=%lu\n", ts,
+		 offs, e1_rates[ss], endp->e1.scd.demux.num_bits);
+	endp->e1.schan = osmo_i460_subchan_add(endp, &endp->trunk->e1.i460_ts[ts - 1], &endp->e1.scd);
+	if (!endp->e1.schan) {
+		LOGPENDP(endp, DE1, LOGL_ERROR, "adding I.460 subchannel: failed!\n");
+		return -EINVAL;
+	}
+
+	if (endp->e1.scd.rate == OSMO_I460_RATE_16k || endp->e1.scd.rate == OSMO_I460_RATE_8k) {
+		/* TRAU frames are only specified for 16k and 8k subslots. For all other subslot
+		 * types the concept of TRAU frames does not apply. However, at the moment this
+		 * is the only format we currently support in osmo-mgw */
+		endp->e1.trau_sync_fi = osmo_trau_sync_alloc(endp, "trau-sync", sync_frame_out_cb, sync_pat_id, endp);
+		if (!endp->e1.trau_sync_fi) {
+			LOGPENDP(endp, DE1, LOGL_ERROR, "adding I.460 TRAU frame sync: failed!\n");
+			return -EINVAL;
+		}
+		endp->e1.trau_rtp_st = talloc_zero(endp->e1.trau_sync_fi, struct osmo_trau2rtp_state);
+		endp->e1.trau_rtp_st->type = OSMO_TRAU_FT_NONE;
+	} else {
+		LOGPENDP(endp, DE1, LOGL_ERROR,
+			 "osmo-mgw currently only supports 16K and 8K subslots (TRAU frames)!\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*! Update E1 related parameters (codec and sync pattern).
+ *  \param[in] endp endpoint to update. */
+void mgcp_e1_endp_update(struct mgcp_endpoint *endp)
+{
+	struct mgcp_conn *conn;
+	struct mgcp_rtp_codec *codec;
+	enum osmo_tray_sync_pat_id sync_pat_id;
+
+	/* In order to determine the codec, find the oldest connection on
+	 * the endpoint and use its codec information. Normally on an E1
+	 * endpoint no more than one connection should exist. */
+	conn = mgcp_conn_get_oldest(endp);
+	OSMO_ASSERT(conn);
+	codec = conn->u.rtp.end.codec;
+	OSMO_ASSERT(codec);
+
+	/* Update codec information */
+	endp->e1.trau_rtp_st->type =
+	    determine_trau_fr_type(codec->subtype_name, endp->e1.scd.rate, endp->e1.last_amr_ft, endp);
+	endp->e1.last_codec = codec;
+
+	/* Update sync pattern */
+	sync_pat_id = determine_trau_sync_pat(codec->subtype_name, endp->e1.scd.rate, endp->e1.last_amr_ft, endp);
+	osmo_trau_sync_set_pat(endp->e1.trau_sync_fi, sync_pat_id);
+}
+
+/*! Remove E1 resources from endpoint
+ *  \param[in] endp endpoint to release. */
+void mgcp_e1_endp_release(struct mgcp_endpoint *endp)
+{
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "removing I.460 subchannel and sync...\n");
+
+	if (endp->e1.schan)
+		osmo_i460_subchan_del(endp->e1.schan);
+	if (endp->e1.trau_rtp_st)
+		talloc_free(endp->e1.trau_rtp_st);
+	if (endp->e1.trau_sync_fi)
+		osmo_fsm_inst_term(endp->e1.trau_sync_fi, OSMO_FSM_TERM_REGULAR, NULL);
+
+	memset(&endp->e1, 0, sizeof(endp->e1));
+}
+
+/*! Accept RTP message buffer with RTP data and enqueue voice data for E1 transmit.
+ *  \param[in] endp related endpoint (does not take ownership).
+ *  \param[in] codec configuration.
+ *  \param[in] msg RTP message buffer (including RTP header).
+ *  \returns 0 on success, -1 on ERROR. */
+int mgcp_e1_send_rtp(struct mgcp_endpoint *endp, struct mgcp_rtp_codec *codec, struct msgb *msg)
+{
+	struct msgb *msg_tf = msgb_alloc(E1_TRAU_BITS_MSGB, "E1-I.460-TX-TRAU-frame");
+	struct rate_ctr_group *rate_ctrs = endp->trunk->ratectr.e1_stats;
+	unsigned int rtp_hdr_len = sizeof(struct rtp_hdr);
+	struct osmo_trau_frame tf;
+	uint8_t amr_ft;
+	int rc;
+
+	/* Extract AMR frame type from AMR head (if AMR is used) */
+	if (tf_type_is_amr(endp->e1.trau_rtp_st->type))
+		amr_ft = (msgb_data(msg)[rtp_hdr_len + 1] >> 3) & 0xf;
+	else
+		amr_ft = 0xff;
+
+	/* Adapt TRAU frame type on codec changes */
+	OSMO_ASSERT(endp->e1.last_codec);
+	if (codec != endp->e1.last_codec || (amr_ft != 0xff && amr_ft != endp->e1.last_amr_ft)) {
+		endp->e1.trau_rtp_st->type =
+		    determine_trau_fr_type(codec->subtype_name, endp->e1.scd.rate, amr_ft, endp);
+		endp->e1.last_codec = codec;
+		endp->e1.last_amr_ft = amr_ft;
+	}
+	if (endp->e1.trau_rtp_st->type == OSMO_TRAU_FT_NONE)
+		goto skip;
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-TX: using trau frame type for encoding: %s\n",
+		 osmo_trau_frame_type_name(endp->e1.trau_rtp_st->type));
+
+	/* Convert from RTP to TRAU format */
+	msg->l2h = msgb_data(msg) + rtp_hdr_len;
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-TX: decoding %u bytes of RTP audio to TRAU format: %s\n",
+		 msgb_length(msg), osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
+	memset(&tf, 0, sizeof(tf));
+	tf.dir = OSMO_TRAU_DIR_DL;
+	rc = osmo_rtp2trau(&tf, msgb_l2(msg), msgb_l2len(msg), endp->e1.trau_rtp_st);
+	if (rc < 0) {
+		LOGPENDP(endp, DE1, LOGL_DEBUG,
+			 "E1-I.460-TX: failed to decode from RTP payload format to TRAU format\n");
+		goto skip;
+	}
+	rc = osmo_trau_frame_encode(msgb_data(msg_tf), msg_tf->data_len, &tf);
+	if (rc < 0) {
+		LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-TX: failed to encode TRAU frame\n");
+		goto skip;
+	}
+	msgb_put(msg_tf, rc);
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-TX: enquing %u trau frame bits: %s...\n", msgb_length(msg_tf),
+		 osmo_ubit_dump(msgb_data(msg_tf),
+				msgb_length(msg_tf) > DEBUG_BITS_MAX ? DEBUG_BITS_MAX : msgb_length(msg_tf)));
+
+	/* Enqueue data to I.460 multiplexer */
+	OSMO_ASSERT(endp->e1.schan);
+	OSMO_ASSERT(endp->e1.trau_sync_fi);
+
+	osmo_i460_mux_enqueue(endp->e1.schan, msg_tf);
+	LOGPENDP(endp, DE1, LOGL_DEBUG, "E1-I.460-TX: %u bits of audio enqued for E1 tx\n", msgb_length(msg_tf));
+
+	return 0;
+skip:
+	rate_ctr_inc(&rate_ctrs->ctr[E1_I460_TRAU_TX_FAIL_CTR]);
+	msgb_free(msg_tf);
+	return -1;
+}

src/libosmo-mgcp/mgcp_endp.c

@@ -1,7 +1,7 @@
 /* Endpoint types */
 
 /*
- * (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ * (C) 2017-2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
  * All Rights Reserved
  *
  * Author: Philipp Maier
@@ -21,17 +21,95 @@
  *
  */
 
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
+#include <osmocom/mgcp/mgcp_conn.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
+
+#include <osmocom/abis/e1_input.h>
+#include <osmocom/mgcp/mgcp_e1.h>
+
+#define E1_RATE_MAX 64
+#define E1_OFFS_MAX 8
 
 /* Endpoint typeset definition */
 const struct mgcp_endpoint_typeset ep_typeset = {
 	/* Specify endpoint properties for RTP endpoint */
-	.rtp.max_conns = 2,
-	.rtp.dispatch_rtp_cb = mgcp_dispatch_rtp_bridge_cb,
-	.rtp.cleanup_cb = mgcp_cleanup_rtp_bridge_cb
+	.rtp = {
+		.max_conns = 2,
+		.dispatch_rtp_cb = mgcp_dispatch_rtp_bridge_cb,
+		.cleanup_cb = mgcp_cleanup_rtp_bridge_cb,
+	},
+	/* Specify endpoint properties for E1 endpoint */
+	.e1 = {
+		.max_conns = 1,
+		.dispatch_rtp_cb = mgcp_dispatch_e1_bridge_cb,
+		.cleanup_cb = mgcp_cleanup_e1_bridge_cb,
+	},
 };
 
+/* Generate virtual endpoint name from given parameters */
+static char *gen_virtual_epname(void *ctx, const char *domain,
+			       unsigned int index)
+{
+	return talloc_asprintf(ctx, "%s%x@%s",
+		 MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK, index, domain);
+}
+
+/* Generate E1 endpoint name from given numeric parameters */
+static char *gen_e1_epname(void *ctx, const char *domain, uint8_t trunk_nr,
+			   uint8_t ts_nr, uint8_t ss_nr)
+{
+	unsigned int rate;
+	unsigned int offset;
+
+	OSMO_ASSERT(ss_nr < sizeof(e1_rates));
+
+	rate = e1_rates[ss_nr];
+	offset = e1_offsets[ss_nr];
+
+	return talloc_asprintf(ctx, "%s%u/s-%u/su%u-%u@%s",
+			       MGCP_ENDPOINT_PREFIX_E1_TRUNK, trunk_nr, ts_nr,
+			       rate, offset, domain);
+}
+
+/*! allocate an endpoint and set default values.
+ *  \param[in] trunk configuration.
+ *  \param[in] name endpoint index.
+ *  \returns endpoint on success, NULL on failure. */
+struct mgcp_endpoint *mgcp_endp_alloc(struct mgcp_trunk *trunk,
+				      unsigned int index)
+{
+	struct mgcp_endpoint *endp;
+
+	endp = talloc_zero(trunk->endpoints, struct mgcp_endpoint);
+	if (!endp)
+		return NULL;
+
+	INIT_LLIST_HEAD(&endp->conns);
+	endp->cfg = trunk->cfg;
+	endp->trunk = trunk;
+
+	switch (trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		endp->type = &ep_typeset.rtp;
+		endp->name = gen_virtual_epname(endp, trunk->cfg->domain, index);
+		break;
+	case MGCP_TRUNK_E1:
+		endp->type = &ep_typeset.e1;
+		endp->name = gen_e1_epname(endp, trunk->cfg->domain,
+					   trunk->trunk_nr,
+					   index / MGCP_ENDP_E1_SUBSLOTS, index % MGCP_ENDP_E1_SUBSLOTS);
+		break;
+	default:
+		osmo_panic("Cannot allocate unimplemented trunk type %d! %s:%d\n",
+			   trunk->trunk_type, __FILE__, __LINE__);
+	}
+
+	return endp;
+}
+
 /*! release endpoint, all open connections are closed.
  *  \param[in] endp endpoint to release */
 void mgcp_endp_release(struct mgcp_endpoint *endp)
@@ -52,4 +130,555 @@ void mgcp_endp_release(struct mgcp_endpoint *endp)
 	talloc_free(endp->local_options.codec);
 	endp->local_options.codec = NULL;
 	endp->wildcarded_req = false;
+
+	if (endp->trunk->trunk_type == MGCP_TRUNK_E1)
+		mgcp_e1_endp_release(endp);
+}
+
+/* Check if the endpoint name contains the prefix (e.g. "rtpbridge/" or
+ * "ds/e1-") and write the epname without the prefix back to the memory
+ * pointed at by epname. (per trunk the prefix is the same for all endpoints,
+ * so no ambiguity is introduced) */
+static void chop_epname_prefix(char *epname, const struct mgcp_trunk *trunk)
+{
+	size_t prefix_len;
+	switch (trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		prefix_len = sizeof(MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK) - 1;
+		if (strncmp
+		    (epname, MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK,
+		     prefix_len) == 0)
+			memmove(epname, epname + prefix_len,
+				strlen(epname) - prefix_len + 1);
+		return;
+	case MGCP_TRUNK_E1:
+		prefix_len = sizeof(MGCP_ENDPOINT_PREFIX_E1_TRUNK) - 1;
+		if (strncmp
+		    (epname, MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK,
+		     prefix_len) == 0)
+			memmove(epname, epname + prefix_len,
+				strlen(epname) - prefix_len + 1);
+		return;
+	default:
+		OSMO_ASSERT(false);
+	}
+}
+
+/* Check if the endpoint name contains a suffix (e.g. "@mgw") and truncate
+ * epname by writing a '\0' char where the suffix starts. */
+static void chop_epname_suffix(char *epname, const struct mgcp_trunk *trunk)
+{
+	char *suffix_begin;
+
+	/* Endpoints on the virtual trunk may have a domain name that is
+	 * followed after an @ character, this can be chopped off. All
+	 * other supported trunk types do not have any suffixes that may
+	 * be chopped off */
+	if (trunk->trunk_type == MGCP_TRUNK_VIRTUAL) {
+		suffix_begin = strchr(epname, '@');
+		if (!suffix_begin)
+			return;
+		*suffix_begin = '\0';
+	}
+}
+
+/* Convert all characters in epname to lowercase and strip trunk prefix and
+ * endpoint name suffix (domain name) from epname. The result is written to
+ * to the memory pointed at by epname_stripped. The expected size of the
+ * result is either equal or lower then the length of the input string
+ * (epname) */
+static void strip_epname(char *epname_stripped, const char *epname,
+			 const struct mgcp_trunk *trunk)
+{
+	osmo_str_tolower_buf(epname_stripped, MGCP_ENDPOINT_MAXLEN, epname);
+	chop_epname_prefix(epname_stripped, trunk);
+	chop_epname_suffix(epname_stripped, trunk);
+}
+
+/* Go through the trunk and find a random free (no active calls) endpoint,
+ * this function is called when a wildcarded request is carried out, which
+ * means that it is up to the MGW to choose a random free endpoint. */
+static struct mgcp_endpoint *find_free_endpoint(const struct mgcp_trunk *trunk)
+{
+	struct mgcp_endpoint *endp;
+	unsigned int i;
+
+	for (i = 0; i < trunk->number_endpoints; i++) {
+		endp = trunk->endpoints[i];
+		/* A free endpoint must not serve a call already and it must
+		 * be available. */
+		if (endp->callid == NULL && mgcp_endp_avail(endp))
+			return endp;
+	}
+
+	return NULL;
+}
+
+/* Find an endpoint specified by its name. If the endpoint can not be found,
+ * return NULL */
+static struct mgcp_endpoint *find_specific_endpoint(const char *epname,
+						    const struct mgcp_trunk *trunk)
+{
+	char epname_stripped[MGCP_ENDPOINT_MAXLEN];
+	char epname_stripped_endp[MGCP_ENDPOINT_MAXLEN];
+	struct mgcp_endpoint *endp;
+	unsigned int i;
+
+	/* Strip irrelevant information from the endpoint name */
+	strip_epname(epname_stripped, epname, trunk);
+
+	for (i = 0; i < trunk->number_endpoints; i++) {
+		endp = trunk->endpoints[i];
+		strip_epname(epname_stripped_endp, endp->name, trunk);
+		if (strcmp(epname_stripped_endp, epname_stripped) == 0)
+			return endp;
+	}
+
+	return NULL;
+}
+
+/*! Find an endpoint by its name on a specified trunk.
+ *  \param[out] cause pointer to store cause code, can be NULL.
+ *  \param[in] epname endpoint name to lookup.
+ *  \param[in] trunk where the endpoint is located.
+ *  \returns endpoint or NULL if endpoint was not found. */
+struct mgcp_endpoint *mgcp_endp_by_name_trunk(int *cause, const char *epname,
+					      const struct mgcp_trunk *trunk)
+{
+	struct mgcp_endpoint *endp;
+
+	if (cause)
+		*cause = 0;
+
+	/* At the moment we only support a primitive ('*'-only) method of
+	 * wildcarded endpoint searches that picks the next free endpoint on
+	 * a trunk. */
+	if (strstr(epname, "*")) {
+		endp = find_free_endpoint(trunk);
+		if (endp) {
+			LOGPENDP(endp, DLMGCP, LOGL_DEBUG,
+				 "(trunk:%d) found free endpoint: %s\n",
+				 trunk->trunk_nr, endp->name);
+			endp->wildcarded_req = true;
+			return endp;
+		}
+
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "(trunk:%d) Not able to find a free endpoint\n",
+		     trunk->trunk_nr);
+		if (cause)
+			*cause = -403;
+		return NULL;
+	}
+
+	/* Find an endpoint by its name (if wildcarded request is not
+	 * applicable) */
+	endp = find_specific_endpoint(epname, trunk);
+	if (endp) {
+		LOGPENDP(endp, DLMGCP, LOGL_DEBUG,
+			 "(trunk:%d) found endpoint: %s\n",
+			 trunk->trunk_nr, endp->name);
+		endp->wildcarded_req = false;
+		return endp;
+	}
+
+	LOGP(DLMGCP, LOGL_ERROR,
+	     "(trunk:%d) Not able to find specified endpoint: %s\n",
+	     trunk->trunk_nr, epname);
+	if (cause)
+		*cause = -500;
+
+	return NULL;
+}
+
+/* Check if the domain name, which is supplied with the endpoint name
+ * matches the configuration. */
+static int check_domain_name(const char *epname, struct mgcp_config *cfg)
+{
+	char *domain_to_check;
+
+	domain_to_check = strstr(epname, "@");
+	if (!domain_to_check) {
+		LOGP(DLMGCP, LOGL_ERROR, "missing domain name in endpoint name \"%s\", expecting \"%s\"\n",
+		     epname, cfg->domain);
+		return -EINVAL;
+	}
+
+	/* Accept any domain if configured as "*" */
+	if (!strcmp(cfg->domain, "*"))
+		return 0;
+
+	if (strcmp(domain_to_check+1, cfg->domain) != 0) {
+		LOGP(DLMGCP, LOGL_ERROR, "wrong domain name in endpoint name \"%s\", expecting \"%s\"\n",
+		     epname, cfg->domain);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*! Find an endpoint by its name, search at all trunks.
+ *  \param[out] cause, pointer to store cause code, can be NULL.
+ *  \param[in] epname, must contain trunk prefix.
+ *  \param[in] cfg, mgcp configuration (trunks).
+ *  \returns endpoint or NULL if endpoint was not found. */
+struct mgcp_endpoint *mgcp_endp_by_name(int *cause, const char *epname,
+					struct mgcp_config *cfg)
+{
+	struct mgcp_trunk *trunk;
+	struct mgcp_endpoint *endp;
+	char epname_lc[MGCP_ENDPOINT_MAXLEN];
+
+	osmo_str_tolower_buf(epname_lc, sizeof(epname_lc), epname);
+	epname = epname_lc;
+
+	if (cause)
+		*cause = -500;
+
+	/* Identify the trunk where the endpoint is located */
+	trunk = mgcp_trunk_by_name(cfg, epname);
+	if (!trunk)
+		return NULL;
+
+	/* All endpoint names require a domain as suffix */
+	if (check_domain_name(epname, cfg))
+		return NULL;
+
+	/* Identify the endpoint on the trunk */
+        endp = mgcp_endp_by_name_trunk(cause, epname, trunk);
+	if (!endp) {
+		return NULL;
+	}
+
+	if (cause)
+		*cause = 0;
+	return endp;
+}
+
+/* Get the E1 timeslot number from a given E1 endpoint name
+ * (e.g. ds/e1-0/s-30/su16-4), returns 0xff on error. */
+static uint8_t e1_ts_nr_from_epname(const char *epname)
+{
+	char buf[MGCP_ENDPOINT_MAXLEN + 1];
+	char *save_ptr = NULL;
+	char *buf_ptr = buf;
+	char *token;
+	unsigned long int res = 0;
+
+	strncpy(buf, epname, MGCP_ENDPOINT_MAXLEN);
+
+	while (1) {
+		token = strtok_r(buf_ptr, "/", &save_ptr);
+		buf_ptr = NULL;
+		if (!token)
+			break;
+		if (strncmp(token, "s-", 2) == 0) {
+			errno = 0;
+			res = strtoul(token + 2, NULL, 10);
+			if (errno == ERANGE || res > NUM_E1_TS)
+				return 0xff;
+			return (uint8_t) res;
+		}
+	}
+
+	return 0xff;
+}
+
+/* Get the E1 timeslot number from a given E1 endpoint name
+ * (e.g. ds/e1-0/s-30/su16-4), returns 0xff on error. */
+static uint8_t e1_rate_from_epname(const char *epname)
+{
+	char buf[MGCP_ENDPOINT_MAXLEN + 1];
+	char *save_ptr = NULL;
+	char *buf_ptr = buf;
+	char *token;
+	unsigned long int res = 0;
+	unsigned int i;
+
+	strncpy(buf, epname, MGCP_ENDPOINT_MAXLEN);
+
+	while (1) {
+		token = strtok_r(buf_ptr, "/", &save_ptr);
+		buf_ptr = NULL;
+		if (!token)
+			break;
+		if (strncmp(token, "su", 2) == 0) {
+			errno = 0;
+			res = strtoul(token + 2, NULL, 10);
+			if (errno == ERANGE || res > E1_RATE_MAX)
+				return 0xff;
+			/* Make sure the rate is a valid rate */
+			for (i = 0; i < sizeof(e1_rates); i++) {
+				if (res == e1_rates[i])
+					return (uint8_t) res;
+			}
+			return 0xff;
+		}
+	}
+
+	return 0xff;
+}
+
+/* Get the E1 bitstream offset from a given E1 endpoint name
+ * (e.g. ds/e1-0/s-30/su16-4), returns 0xff on error. */
+static uint8_t e1_offs_from_epname(const char *epname)
+{
+	char buf[MGCP_ENDPOINT_MAXLEN + 1];
+	char *save_ptr = NULL;
+	char *buf_ptr = buf;
+	char *token;
+	unsigned long int res = 0;
+
+	strncpy(buf, epname, MGCP_ENDPOINT_MAXLEN);
+
+	while (1) {
+		token = strtok_r(buf_ptr, "/", &save_ptr);
+		buf_ptr = NULL;
+		if (!token)
+			break;
+		if (strncmp(token, "su", 2) == 0) {
+			token = strstr(token, "-");
+			if (!token)
+				return 0xff;
+			token += 1;
+			errno = 0;
+			res = strtoul(token, NULL, 10);
+			if (errno == ERANGE || res > E1_OFFS_MAX)
+				return 0xff;
+			return (uint8_t) res;
+		}
+	}
+
+	return 0xff;
+}
+
+/* Get the E1 subslot number (internal) from a given E1 endpoint name
+ * (e.g. ds/e1-0/s-30/su16-4), returns 0xff on error. */
+static uint8_t e1_ss_nr_from_epname(const char *epname)
+{
+	uint8_t rate;
+	uint8_t offs;
+	unsigned int i;
+
+	rate = e1_rate_from_epname(epname);
+	offs = e1_offs_from_epname(epname);
+
+	osmo_static_assert(sizeof(e1_rates) == sizeof(e1_offsets), e1_rates_e1_offsets_size);
+
+	for (i = 0; i < sizeof(e1_rates); i++) {
+		if ((e1_rates[i] == rate) && (e1_offsets[i] == offs))
+			return i;
+	}
+
+	return 0xff;
+}
+
+/* Check if the selected E1 endpoint is avalable, which means that none of
+ * the overlapping endpoints are currently serving a call. (if the system
+ * is properly configured such a situation should never ocurr!) */
+static bool endp_avail_e1(struct mgcp_endpoint *endp)
+{
+	/* The following map shows the overlapping of the subslots and their
+	 * respective rates. The numbers on the right running from top to bottom
+	 * are the bit offsets in the whole 64k timeslot. The numbers inside the
+	 * boxes symbolize the internal subslot number (array index) and the
+	 * rate in the form: i:r where i is the subslot number and r the
+	 * respective rate.
+	 *
+	 * +--------+--------+--------+--------+ 0
+	 * |        |        |        |  7:8k  |
+	 * |        |        + 3:16k  +--------+ 1
+	 * |        |        |        |  8:8k  |
+	 * |        | 1:32k  +--------+--------+ 2
+	 * |        |        |        |  9:8k  |
+	 * |        |        + 4:16k  +--------+ 3
+	 * |        |        |        | 10:8k  |
+	 * | 0:64k  +--------+--------+--------+ 4
+	 * |        |        |        | 11:8k  |
+	 * |        |        + 5:16k  +--------+ 5
+	 * |        |        |        | 12:8k  |
+	 * |        | 2:32k  +--------+--------+ 6
+	 * |        |        |        | 13:8k  |
+	 * |        |        + 6:16k  +--------+ 7
+	 * |        |        |        | 14:8k  |
+	 * +--------+--------+--------+--------+ 8
+	 *
+	 * The following array contains tables with the subslot numbers that must be
+	 * unused for each subslot. During this test we do not have to check the
+	 * endpoint we need to verify, only the overlaps need to be checked. This is
+	 * also the reason why the related subslot number is missing from each each
+	 * line. */
+	const int8_t interlock_tab[MGCP_ENDP_E1_SUBSLOTS][15] = {
+		{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1 },
+		{ 0, 3, 4, 7, 8, 9, 10, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 5, 6, 11, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 9, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 11, 12, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 1, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+		{ 0, 2, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 } };
+
+	const int8_t *interlock;
+	unsigned int i;
+	uint8_t ts_nr = 0;
+	uint8_t ss_nr = 0;
+	char *epname_check;
+	struct mgcp_endpoint *endp_check;
+	bool available = true;
+
+	/* This function must only be used with E1 type endpoints! */
+	OSMO_ASSERT(endp->trunk->trunk_type == MGCP_TRUNK_E1);
+
+	ts_nr = e1_ts_nr_from_epname(endp->name);
+	ss_nr = e1_ss_nr_from_epname(endp->name);
+	if (ts_nr == 0xff || ss_nr == 0xff) {
+		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+			 "cannot check endpoint availability, endpoint name not parseable!\n");
+		return false;
+	}
+
+	interlock = interlock_tab[ss_nr];
+
+	for (i = 0; i < sizeof(interlock_tab[0]); i++) {
+		/* Detect row end */
+		if (interlock[i] == -1)
+			break;
+
+		/* Pick overlapping endpoint to check */
+		epname_check = gen_e1_epname(endp, endp->trunk->cfg->domain,
+					     endp->trunk->trunk_nr, ts_nr,
+					     interlock[i]);
+		endp_check = find_specific_endpoint(epname_check, endp->trunk);
+		if (!endp_check) {
+			LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+				 "cannot check endpoint availability, overlapping endpoint:%s not found!\n",
+				 epname_check);
+			talloc_free(epname_check);
+			continue;
+		}
+		talloc_free(epname_check);
+
+		/* Check if overlapping endpoint currently serves another call
+		 * (This is an exceptional situation, that should not occur
+		 * in a properly configured environment!) */
+		if (endp_check->callid) {
+			LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+				 "endpoint unavailable - overlapping endpoint:%s already serves a call!\n",
+				 endp_check->name);
+			available = false;
+		}
+	}
+
+	return available;
+}
+
+/*! check if an endpoint is available for any kind of operation.
+ *  \param[in] endp endpoint to check.
+ *  \returns true if endpoint is avalable, false it is blocked for any reason. */
+bool mgcp_endp_avail(struct mgcp_endpoint *endp)
+{
+	switch (endp->trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		/* There are no obstacles that may render a virtual trunk
+		 * endpoint unusable, so virtual trunk endpoints are always
+		 * available */
+		return true;
+	case MGCP_TRUNK_E1:
+		return endp_avail_e1(endp);
+	default:
+		OSMO_ASSERT(false);
+	}
+
+	return false;
+}
+
+/*! claim endpoint, sets callid and activates endpoint, should be called at the
+ *  beginning of the CRCX procedure when it is clear that a new call should be
+ *  created.
+ *  \param[in] endp endpoint to claim.
+ *  \param[in] callid that is assingned to this endpoint. */
+int mgcp_endp_claim(struct mgcp_endpoint *endp, const char *callid)
+{
+	int rc = 0;
+	uint8_t ts;
+	uint8_t ss;
+	uint8_t offs;
+
+	/* TODO: Make this function more intelligent, it should run the
+	 * call id checks we currently have in protocol.c directly here. */
+
+	/* Set the callid, creation of another connection will only be possible
+	 * when the callid matches up. (Connections are distinguished by their
+	 * connection ids) */
+	endp->callid = talloc_strdup(endp, callid);
+	OSMO_ASSERT(endp->callid);
+
+	/* Allocate resources */
+	switch (endp->trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		/* No additional initaliziation required here, virtual
+		 * endpoints will open/close network sockets themselves
+		 * on demand. */
+		break;
+	case MGCP_TRUNK_E1:
+		ts = e1_ts_nr_from_epname(endp->name);
+		ss = e1_ss_nr_from_epname(endp->name);
+		offs = e1_offs_from_epname(endp->name);
+		OSMO_ASSERT(ts != 0xFF);
+		OSMO_ASSERT(ts != 0);
+		OSMO_ASSERT(ss != 0xFF);
+		OSMO_ASSERT(offs != 0xFF);
+		rc = mgcp_e1_endp_equip(endp, ts, ss, offs);
+		break;
+	default:
+		OSMO_ASSERT(false);
+	}
+
+	/* Make sure the endpoint is released when claiming the endpoint fails. */
+	if (rc < 0)
+		mgcp_endp_release(endp);
+
+	return rc;
+}
+
+/*! update endpoint, updates internal endpoint specific data, should be
+ *  after when MDCX or CRCX has been executed successuflly.
+ *  \param[in] endp endpoint to update. */
+void mgcp_endp_update(struct mgcp_endpoint *endp)
+{
+	/* Allocate resources */
+	switch (endp->trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		/* No updating initaliziation required for virtual endpoints. */
+		break;
+	case MGCP_TRUNK_E1:
+		mgcp_e1_endp_update(endp);
+		break;
+	default:
+		OSMO_ASSERT(false);
+	}
+}
+
+void mgcp_endp_add_conn(struct mgcp_endpoint *endp, struct mgcp_conn *conn)
+{
+	llist_add(&conn->entry, &endp->conns);
+}
+
+void mgcp_endp_remove_conn(struct mgcp_endpoint *endp, struct mgcp_conn *conn)
+{
+	/* Run endpoint cleanup action. By this we inform the endpoint about
+	 * the removal of the connection and allow it to clean up its inner
+	 * state accordingly */
+	if (endp->type->cleanup_cb)
+		endp->type->cleanup_cb(endp, conn);
+	llist_del(&conn->entry);
+	if (llist_empty(&endp->conns))
+		mgcp_endp_release(endp);
 }

src/libosmo-mgcp/mgcp_msg.c

@@ -24,7 +24,9 @@
 
 #include <limits.h>
 
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/osmux.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_common.h>
 #include <osmocom/mgcp/mgcp_msg.h>
 #include <osmocom/mgcp/mgcp_conn.h>
@@ -105,7 +107,7 @@ int mgcp_parse_conn_mode(const char *mode, struct mgcp_endpoint *endp,
 		ret = -1;
 	}
 
-	/* Special handling für RTP connections */
+	/* Special handling for RTP connections */
 	if (conn->type == MGCP_CONN_TYPE_RTP) {
 		conn->u.rtp.end.output_enabled =
 		    conn->mode & MGCP_CONN_SEND_ONLY ? 1 : 0;
@@ -129,166 +131,6 @@ int mgcp_parse_conn_mode(const char *mode, struct mgcp_endpoint *endp,
 	return ret;
 }
 
-/* We have a null terminated string with the endpoint name here. We only
- * support two kinds. Simple ones as seen on the BSC level and the ones
- * seen on the trunk side. (helper function for find_endpoint()) */
-static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg,
-					      const char *mgcp)
-{
-	char *rest = NULL;
-	struct mgcp_trunk_config *tcfg;
-	int trunk, endp;
-	struct mgcp_endpoint *endp_ptr;
-
-	trunk = strtoul(mgcp + 6, &rest, 10);
-	if (rest == NULL || rest[0] != '/' || trunk < 1) {
-		LOGP(DLMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp);
-		return NULL;
-	}
-
-	endp = strtoul(rest + 1, &rest, 10);
-	if (rest == NULL || rest[0] != '@') {
-		LOGP(DLMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp);
-		return NULL;
-	}
-
-	/* signalling is on timeslot 1 */
-	if (endp == 1)
-		return NULL;
-
-	tcfg = mgcp_trunk_num(cfg, trunk);
-	if (!tcfg) {
-		LOGP(DLMGCP, LOGL_ERROR, "The trunk %d is not declared.\n",
-		     trunk);
-		return NULL;
-	}
-
-	if (!tcfg->endpoints) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "Endpoints of trunk %d not allocated.\n", trunk);
-		return NULL;
-	}
-
-	if (endp < 1 || endp >= tcfg->number_endpoints) {
-		LOGP(DLMGCP, LOGL_ERROR, "Failed to find endpoint '%s'\n",
-		     mgcp);
-		return NULL;
-	}
-
-	endp_ptr = &tcfg->endpoints[endp];
-	endp_ptr->wildcarded_req = false;
-	return endp_ptr;
-}
-
-/* Find an endpoint that is not in use. Do this by going through the endpoint
- * array, check the callid. A callid nullpointer indicates that the endpoint
- * is free */
-static struct mgcp_endpoint *find_free_endpoint(struct mgcp_endpoint *endpoints,
-						unsigned int number_endpoints)
-{
-	struct mgcp_endpoint *endp;
-	unsigned int i;
-
-	for (i = 0; i < number_endpoints; i++) {
-		if (endpoints[i].callid == NULL) {
-			endp = &endpoints[i];
-			LOGPENDP(endp, DLMGCP, LOGL_DEBUG,
-			     "found free endpoint\n");
-			endp->wildcarded_req = true;
-			return endp;
-		}
-	}
-
-	LOGP(DLMGCP, LOGL_ERROR, "Not able to find a free endpoint\n");
-	return NULL;
-}
-
-/* Check if the domain name, which is supplied with the endpoint name
- * matches the configuration. */
-static int check_domain_name(struct mgcp_config *cfg, const char *mgcp)
-{
-	char *domain_to_check;
-
-	domain_to_check = strstr(mgcp, "@");
-	if (!domain_to_check)
-		return -EINVAL;
-
-	/* Accept any domain if configured as "*" */
-	if (!strcmp(cfg->domain, "*"))
-		return 0;
-
-	if (strcmp(domain_to_check+1, cfg->domain) != 0) {
-		LOGP(DLMGCP, LOGL_ERROR, "Wrong domain name '%s', expecting '%s'\n", mgcp, cfg->domain);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* Search the endpoint pool for the endpoint that had been selected via the
- * MGCP message (helper function for mgcp_analyze_header()) */
-static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg,
-					   const char *mgcp,
-					   int *cause)
-{
-	char *endptr = NULL;
-	unsigned int gw = INT_MAX;
-	const char *endpoint_number_str;
-	struct mgcp_endpoint *endp;
-
-	*cause = 0;
-
-	/* Check if the domainname in the request is correct */
-	if (check_domain_name(cfg, mgcp)) {
-		*cause = -500;
-		return NULL;
-	}
-
-	/* Check if the E1 trunk is requested */
-	if (strncmp(mgcp, "ds/e1", 5) == 0) {
-		endp = find_e1_endpoint(cfg, mgcp);
-		if (!endp)
-			*cause = -500;
-		return endp;
-	}
-
-	/* Check if the virtual trunk is addressed (new, correct way with prefix) */
-	if (strncmp
-	    (mgcp, MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK,
-	     strlen(MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK)) == 0) {
-		endpoint_number_str =
-		    mgcp + strlen(MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK);
-		if (endpoint_number_str[0] == '*') {
-			endp = find_free_endpoint(cfg->trunk.endpoints,
-						  cfg->trunk.number_endpoints);
-			if (!endp)
-				*cause = -403;
-			return endp;
-		}
-		gw = strtoul(endpoint_number_str, &endptr, 16);
-		if (gw < cfg->trunk.number_endpoints && endptr[0] == '@') {
-			endp = &cfg->trunk.endpoints[gw];
-			endp->wildcarded_req = false;
-			return endp;
-		}
-	}
-
-	/* Deprecated method without prefix */
-	LOGP(DLMGCP, LOGL_NOTICE,
-	     "Addressing virtual trunk without prefix (deprecated), please use %s: '%s'\n",
-	     MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK, mgcp);
-	gw = strtoul(mgcp, &endptr, 16);
-	if (gw < cfg->trunk.number_endpoints && endptr[0] == '@') {
-		endp = &cfg->trunk.endpoints[gw];
-		endp->wildcarded_req = false;
-		return endp;
-	}
-
-	LOGP(DLMGCP, LOGL_ERROR, "Not able to find the endpoint: '%s'\n", mgcp);
-	*cause = -500;
-	return NULL;
-}
-
 /*! Analyze and parse the the hader of an MGCP messeage string.
  *  \param[out] pdata caller provided memory to store the parsing results
  *  \param[in] data mgcp message string
@@ -316,7 +158,7 @@ int mgcp_parse_header(struct mgcp_parse_data *pdata, char *data)
 			pdata->trans = elem;
 			break;
 		case 1:
-			pdata->endp = find_endpoint(pdata->cfg, elem, &cause);
+			pdata->endp = mgcp_endp_by_name(&cause, elem, pdata->cfg);
 			if (!pdata->endp) {
 				LOGP(DLMGCP, LOGL_ERROR,
 				     "Unable to find Endpoint `%s'\n", elem);
@@ -390,8 +232,8 @@ int mgcp_check_param(const struct mgcp_endpoint *endp, const char *line)
 	const size_t line_len = strlen(line);
 	if (line[0] != '\0' && line_len < 2) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "Wrong MGCP option format: '%s' on 0x%x\n",
-		     line, ENDPOINT_NUMBER(endp));
+		     "Wrong MGCP option format: '%s' on %s\n",
+		     line, endp->name);
 		return 0;
 	}
 
@@ -403,7 +245,7 @@ int mgcp_check_param(const struct mgcp_endpoint *endp, const char *line)
 /*! Check if the specified callid seems plausible.
   * \param[in] endp pointer to endpoint
   * \param{in] callid to verify
-  * \returns 1 when callid seems plausible, 0 on error */
+  * \returns 0 when callid seems plausible, -1 on error */
 int mgcp_verify_call_id(struct mgcp_endpoint *endp, const char *callid)
 {
 	/*! This function compares the supplied callid with the called that is

src/libosmo-mgcp/mgcp_osmux.c

@@ -23,10 +23,11 @@
 #include <osmocom/netif/amr.h>
 
 #include <osmocom/mgcp/mgcp.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/osmux.h>
 #include <osmocom/mgcp/mgcp_conn.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
 
 static struct osmo_fd osmux_fd;
 
@@ -34,6 +35,7 @@ static LLIST_HEAD(osmux_handle_list);
 
 struct osmux_handle {
 	struct llist_head head;
+	struct mgcp_conn_rtp *conn;
 	struct osmux_in_handle *in;
 	struct in_addr rem_addr;
 	int rem_port; /* network byte order */
@@ -46,14 +48,17 @@ static void *osmux;
 static void osmux_deliver_cb(struct msgb *batch_msg, void *data)
 {
 	struct osmux_handle *handle = data;
-	struct sockaddr_in out = {
-		.sin_family = AF_INET,
-		.sin_port = handle->rem_port,
-	};
+	struct mgcp_conn_rtp *conn = handle->conn;
 
-	memcpy(&out.sin_addr, &handle->rem_addr, sizeof(handle->rem_addr));
-	sendto(osmux_fd.fd, batch_msg->data, batch_msg->len, 0,
-		(struct sockaddr *)&out, sizeof(out));
+	if (conn->end.output_enabled) {
+		struct sockaddr_in out = {
+			.sin_family = AF_INET,
+			.sin_port = handle->rem_port,
+		};
+		memcpy(&out.sin_addr, &handle->rem_addr, sizeof(handle->rem_addr));
+		sendto(osmux_fd.fd, batch_msg->data, batch_msg->len, 0,
+			(struct sockaddr *)&out, sizeof(out));
+	}
 	msgb_free(batch_msg);
 }
 
@@ -108,13 +113,15 @@ static void osmux_handle_put(struct osmux_in_handle *in)
 
 /* Allocate free OSMUX handle */
 static struct osmux_handle *
-osmux_handle_alloc(struct mgcp_config *cfg, struct in_addr *addr, int rem_port)
+osmux_handle_alloc(struct mgcp_conn_rtp *conn, struct in_addr *addr, int rem_port)
 {
 	struct osmux_handle *h;
+	struct mgcp_config *cfg = conn->conn->endp->cfg;
 
 	h = talloc_zero(osmux, struct osmux_handle);
 	if (!h)
 		return NULL;
+	h->conn = conn;
 	h->rem_addr = *addr;
 	h->rem_port = rem_port;
 	h->refcnt++;
@@ -147,15 +154,20 @@ osmux_handle_alloc(struct mgcp_config *cfg, struct in_addr *addr, int rem_port)
 /* Lookup existing handle for a specified address, if the handle can not be
  * found, the function will automatically allocate one */
 static struct osmux_in_handle *
-osmux_handle_lookup(struct mgcp_config *cfg, struct in_addr *addr, int rem_port)
+osmux_handle_lookup(struct mgcp_conn_rtp *conn, struct osmo_sockaddr *addr, int rem_port)
 {
 	struct osmux_handle *h;
 
-	h = osmux_handle_find_get(addr, rem_port);
+	if (addr->u.sa.sa_family != AF_INET) {
+		LOGP(DLMGCP, LOGL_DEBUG, "IPv6 not supported in osmux yet!\n");
+		return NULL;
+	}
+
+	h = osmux_handle_find_get(&addr->u.sin.sin_addr, rem_port);
 	if (h != NULL)
 		return h->in;
 
-	h = osmux_handle_alloc(cfg, addr, rem_port);
+	h = osmux_handle_alloc(conn, &addr->u.sin.sin_addr, rem_port);
 	if (h == NULL)
 		return NULL;
 
@@ -197,14 +209,15 @@ static struct mgcp_conn_rtp*
 osmux_conn_lookup(struct mgcp_config *cfg, uint8_t cid,
 		struct in_addr *from_addr)
 {
+	struct mgcp_trunk *trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 	struct mgcp_endpoint *endp;
 	struct mgcp_conn *conn = NULL;
 	struct mgcp_conn_rtp * conn_rtp;
 	int i;
 
-	for (i=0; i<cfg->trunk.number_endpoints; i++) {
+	for (i = 0; i < trunk->number_endpoints; i++) {
 
-		endp = &cfg->trunk.endpoints[i];
+		endp = trunk->endpoints[i];
 
 		llist_for_each_entry(conn, &endp->conns, entry) {
 			if (conn->type != MGCP_CONN_TYPE_RTP)
@@ -234,13 +247,15 @@ static void scheduled_from_osmux_tx_rtp_cb(struct msgb *msg, void *data)
 {
 	struct mgcp_conn_rtp *conn = data;
 	struct mgcp_endpoint *endp = conn->conn->endp;
-	struct sockaddr_in addr = {
-		.sin_addr = conn->end.addr,
-		.sin_port = conn->end.rtp_port,
-	}; /* FIXME: not set/used in cb */
+	struct osmo_sockaddr addr = { /* FIXME: do we know the source address?? */ };
+	struct osmo_rtp_msg_ctx *mc = OSMO_RTP_MSG_CTX(msg);
+	*mc = (struct osmo_rtp_msg_ctx){
+		.proto = MGCP_PROTO_RTP,
+		.conn_src = conn,
+		.from_addr = &addr,
+	};
 
-
-	endp->type->dispatch_rtp_cb(MGCP_PROTO_RTP, &addr, (char *)msg->data, msg->len, conn->conn);
+	endp->type->dispatch_rtp_cb(msg);
 	msgb_free(msg);
 }
 
@@ -271,6 +286,8 @@ static struct msgb *osmux_recv(struct osmo_fd *ofd, struct sockaddr_in *addr)
 static int endp_osmux_state_check(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
 				  bool sending)
 {
+	char ipbuf[INET6_ADDRSTRLEN];
+
 	switch(conn->osmux.state) {
 	case OSMUX_STATE_ACTIVATING:
 	if (osmux_enable_conn(endp, conn, &conn->end.addr, conn->end.rtp_port) < 0) {
@@ -283,7 +300,8 @@ static int endp_osmux_state_check(struct mgcp_endpoint *endp, struct mgcp_conn_r
 		LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR,
 			 "Osmux %s CID %u towards %s:%u is now enabled\n",
 			 sending ? "sent" : "received",
-			 conn->osmux.cid, inet_ntoa(conn->end.addr),
+			 conn->osmux.cid,
+			 osmo_sockaddr_ntop(&conn->end.addr.u.sa, ipbuf),
 			 ntohs(conn->end.rtp_port));
 		return 0;
 	case OSMUX_STATE_ENABLED:
@@ -372,6 +390,8 @@ static int osmux_read_fd_cb(struct osmo_fd *ofd, unsigned int what)
 			goto out;
 		}
 
+		mgcp_conn_watchdog_kick(conn_src->conn);
+
 		/*conn_dst = mgcp_find_dst_conn(conn_src->conn);
 		if (!conn_dst) {
 			LOGP(DLMGCP, LOGL_ERROR,
@@ -396,8 +416,7 @@ int osmux_init(int role, struct mgcp_config *cfg)
 {
 	int ret;
 
-	osmux_fd.cb = osmux_read_fd_cb;
-	osmux_fd.data = cfg;
+	osmo_fd_setup(&osmux_fd, -1, OSMO_FD_READ, osmux_read_fd_cb, cfg, 0);
 
 	ret = mgcp_create_bind(cfg->osmux_addr, &osmux_fd, cfg->osmux_port);
 	if (ret < 0) {
@@ -406,7 +425,6 @@ int osmux_init(int role, struct mgcp_config *cfg)
 		return ret;
 	}
 	mgcp_set_ip_tos(osmux_fd.fd, cfg->endp_dscp);
-	osmux_fd.when |= BSC_FD_READ;
 
 	ret = osmo_fd_register(&osmux_fd);
 	if (ret < 0) {
@@ -429,7 +447,7 @@ int osmux_init(int role, struct mgcp_config *cfg)
  *  \param[in] port portnumber of the remote OSMUX endpoint (in network byte order)
  *  \returns 0 on success, -1 on ERROR */
 int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
-		      struct in_addr *addr, uint16_t port)
+		      struct osmo_sockaddr *addr, uint16_t port)
 {
 	/*! If osmux is enabled, initialize the output handler. This handler is
 	 *  used to reconstruct the RTP flow from osmux. The RTP SSRC is
@@ -440,7 +458,7 @@ int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
 	 *  overlapping RTP SSRC traveling to the BTSes behind the BSC,
 	 *  similarly, for flows traveling to the MSC.
 	 */
-	struct in_addr addr_unset = {};
+	struct in6_addr addr_unset = {};
 	static const uint32_t rtp_ssrc_winlen = UINT32_MAX / (OSMUX_CID_MAX + 1);
 	uint16_t osmux_dummy = endp->cfg->osmux_dummy;
 
@@ -453,13 +471,16 @@ int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
 	}
 
 	/* Wait until we have the connection information from MDCX */
-	if (memcmp(&conn->end.addr, &addr_unset, sizeof(addr_unset)) == 0) {
+	if (memcmp(&conn->end.addr, &addr_unset,
+		   conn->end.addr.u.sa.sa_family == AF_INET6 ?
+			sizeof(struct in6_addr) :
+			sizeof(struct in_addr)) == 0) {
 		LOGPCONN(conn->conn, DLMGCP, LOGL_INFO,
 			"Osmux remote address/port still unknown\n");
 		return -1;
 	}
 
-	conn->osmux.in = osmux_handle_lookup(endp->cfg, addr, port);
+	conn->osmux.in = osmux_handle_lookup(conn, addr, port);
 	if (!conn->osmux.in) {
 		LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR,
 			"Cannot allocate input osmux handle for conn:%s\n",
@@ -555,6 +576,7 @@ int conn_osmux_allocate_cid(struct mgcp_conn_rtp *conn, int osmux_cid)
  *  \returns bytes sent, -1 on error */
 int osmux_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
 {
+	char ipbuf[INET6_ADDRSTRLEN];
 	struct osmux_hdr *osmuxh;
 	int buf_len;
 	struct in_addr addr_unset = {};
@@ -584,7 +606,8 @@ int osmux_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
 
 	LOGPCONN(conn->conn, DLMGCP, LOGL_DEBUG,
 		 "sending OSMUX dummy load to %s:%u CID %u\n",
-		 inet_ntoa(conn->end.addr), ntohs(conn->end.rtp_port), conn->osmux.cid);
+		 osmo_sockaddr_ntop(&conn->end.addr.u.sa, ipbuf),
+		 ntohs(conn->end.rtp_port), conn->osmux.cid);
 
 	return mgcp_udp_send(osmux_fd.fd, &conn->end.addr,
 			     conn->end.rtp_port, (char*)osmuxh, buf_len);

src/libosmo-mgcp/mgcp_protocol.c

@@ -32,14 +32,16 @@
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/select.h>
-#include <osmocom/core/stats.h>
 
 #include <osmocom/mgcp/mgcp.h>
 #include <osmocom/mgcp/mgcp_common.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/osmux.h>
+#include <osmocom/mgcp/mgcp_network.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_stat.h>
 #include <osmocom/mgcp/mgcp_msg.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
 #include <osmocom/mgcp/mgcp_sdp.h>
 #include <osmocom/mgcp/mgcp_codec.h>
 #include <osmocom/mgcp/mgcp_conn.h>
@@ -53,83 +55,6 @@ struct mgcp_request {
 #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \
 	{ .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME },
 
-static const struct rate_ctr_desc mgcp_crcx_ctr_desc[] = {
-	[MGCP_CRCX_SUCCESS] = {"crcx:success", "CRCX command processed successfully."},
-	[MGCP_CRCX_FAIL_BAD_ACTION] = {"crcx:bad_action", "bad action in CRCX command."},
-	[MGCP_CRCX_FAIL_UNHANDLED_PARAM] = {"crcx:unhandled_param", "unhandled parameter in CRCX command."},
-	[MGCP_CRCX_FAIL_MISSING_CALLID] = {"crcx:missing_callid", "missing CallId in CRCX command."},
-	[MGCP_CRCX_FAIL_INVALID_MODE] = {"crcx:invalid_mode", "invalid connection mode in CRCX command."},
-	[MGCP_CRCX_FAIL_LIMIT_EXCEEDED] = {"crcx:limit_exceeded", "limit of concurrent connections was reached."},
-	[MGCP_CRCX_FAIL_UNKNOWN_CALLID] = {"crcx:unkown_callid", "unknown CallId in CRCX command."},
-	[MGCP_CRCX_FAIL_ALLOC_CONN] = {"crcx:alloc_conn_fail", "connection allocation failure."},
-	[MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC] = {"crcx:no_remote_conn_desc", "no opposite end specified for connection."},
-	[MGCP_CRCX_FAIL_START_RTP] = {"crcx:start_rtp_failure", "failure to start RTP processing."},
-	[MGCP_CRCX_FAIL_REJECTED_BY_POLICY] = {"crcx:conn_rejected", "connection rejected by policy."},
-	[MGCP_CRCX_FAIL_NO_OSMUX] = {"crcx:no_osmux", "no osmux offered by peer."},
-	[MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS] = {"crcx:conn_opt", "connection options invalid."},
-	[MGCP_CRCX_FAIL_CODEC_NEGOTIATION] = {"crcx:codec_nego", "codec negotiation failure."},
-	[MGCP_CRCX_FAIL_BIND_PORT] = {"crcx:bind_port", "port bind failure."},
-};
-
-const static struct rate_ctr_group_desc mgcp_crcx_ctr_group_desc = {
-	.group_name_prefix = "crcx",
-	.group_description = "crxc statistics",
-	.class_id = OSMO_STATS_CLASS_GLOBAL,
-	.num_ctr = ARRAY_SIZE(mgcp_crcx_ctr_desc),
-	.ctr_desc = mgcp_crcx_ctr_desc
-};
-
-static const struct rate_ctr_desc mgcp_mdcx_ctr_desc[] = {
-	[MGCP_MDCX_SUCCESS] = {"mdcx:success", "MDCX command processed successfully."},
-	[MGCP_MDCX_FAIL_WILDCARD] = {"mdcx:wildcard", "wildcard endpoint names in MDCX commands are unsupported."},
-	[MGCP_MDCX_FAIL_NO_CONN] = {"mdcx:no_conn", "endpoint specified in MDCX command has no active connections."},
-	[MGCP_MDCX_FAIL_INVALID_CALLID] = {"mdcx:callid", "invalid CallId specified in MDCX command."},
-	[MGCP_MDCX_FAIL_INVALID_CONNID] = {"mdcx:connid", "invalid connection ID specified in MDCX command."},
-	[MGCP_MDCX_FAIL_UNHANDLED_PARAM] = {"crcx:unhandled_param", "unhandled parameter in MDCX command."},
-	[MGCP_MDCX_FAIL_NO_CONNID] = {"mdcx:no_connid", "no connection ID specified in MDCX command."},
-	[MGCP_MDCX_FAIL_CONN_NOT_FOUND] = {"mdcx:conn_not_found", "connection specified in MDCX command does not exist."},
-	[MGCP_MDCX_FAIL_INVALID_MODE] = {"mdcx:invalid_mode", "invalid connection mode in MDCX command."},
-	[MGCP_MDCX_FAIL_INVALID_CONN_OPTIONS] = {"mdcx:conn_opt", "connection options invalid."},
-	[MGCP_MDCX_FAIL_NO_REMOTE_CONN_DESC] = {"mdcx:no_remote_conn_desc", "no opposite end specified for connection."},
-	[MGCP_MDCX_FAIL_START_RTP] = {"mdcx:start_rtp_failure", "failure to start RTP processing."},
-	[MGCP_MDCX_FAIL_REJECTED_BY_POLICY] = {"mdcx:conn_rejected", "connection rejected by policy."},
-	[MGCP_MDCX_DEFERRED_BY_POLICY] = {"mdcx:conn_deferred", "connection deferred by policy."},
-};
-
-const static struct rate_ctr_group_desc mgcp_mdcx_ctr_group_desc = {
-	.group_name_prefix = "mdcx",
-	.group_description = "mdcx statistics",
-	.class_id = OSMO_STATS_CLASS_GLOBAL,
-	.num_ctr = ARRAY_SIZE(mgcp_mdcx_ctr_desc),
-	.ctr_desc = mgcp_mdcx_ctr_desc
-};
-
-static const struct rate_ctr_desc mgcp_dlcx_ctr_desc[] = {
-	[MGCP_DLCX_SUCCESS] = {"dlcx:success", "DLCX command processed successfully."},
-	[MGCP_DLCX_FAIL_WILDCARD] = {"dlcx:wildcard", "wildcard names in DLCX commands are unsupported."},
-	[MGCP_DLCX_FAIL_NO_CONN] = {"dlcx:no_conn", "endpoint specified in DLCX command has no active connections."},
-	[MGCP_DLCX_FAIL_INVALID_CALLID] = {"dlcx:callid", "CallId specified in DLCX command mismatches endpoint's CallId ."},
-	[MGCP_DLCX_FAIL_INVALID_CONNID] = {"dlcx:connid", "connection ID specified in DLCX command does not exist on endpoint."},
-	[MGCP_DLCX_FAIL_UNHANDLED_PARAM] = {"dlcx:unhandled_param", "unhandled parameter in DLCX command."},
-	[MGCP_DLCX_FAIL_REJECTED_BY_POLICY] = {"dlcx:rejected", "connection deletion rejected by policy."},
-	[MGCP_DLCX_DEFERRED_BY_POLICY] = {"dlcx:deferred", "connection deletion deferred by policy."},
-};
-
-const static struct rate_ctr_group_desc mgcp_dlcx_ctr_group_desc = {
-	.group_name_prefix = "dlcx",
-	.group_description = "dlcx statistics",
-	.class_id = OSMO_STATS_CLASS_GLOBAL,
-	.num_ctr = ARRAY_SIZE(mgcp_dlcx_ctr_desc),
-	.ctr_desc = mgcp_dlcx_ctr_desc
-};
-
-const static struct rate_ctr_group_desc all_rtp_conn_rate_ctr_group_desc = {
-	.group_name_prefix = "all_rtp_conn",
-	.group_description = "aggregated statistics for all rtp connections",
-	.class_id = 1,
-	.num_ctr = ARRAY_SIZE(all_rtp_conn_rate_ctr_desc),
-	.ctr_desc = all_rtp_conn_rate_ctr_desc
-};
 
 static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *data);
 static struct msgb *handle_create_con(struct mgcp_parse_data *data);
@@ -236,11 +161,11 @@ static struct msgb *create_resp(struct mgcp_endpoint *endp, int code,
 	 * Remember the last transmission per endpoint.
 	 */
 	if (endp) {
-		struct mgcp_trunk_config *tcfg = endp->tcfg;
+		struct mgcp_trunk *trunk = endp->trunk;
 		talloc_free(endp->last_response);
 		talloc_free(endp->last_trans);
-		endp->last_trans = talloc_strdup(tcfg->endpoints, trans);
-		endp->last_response = talloc_strndup(tcfg->endpoints,
+		endp->last_trans = talloc_strdup(trunk->endpoints, trans);
+		endp->last_response = talloc_strndup(trunk->endpoints,
 						     (const char *)res->l2h,
 						     msgb_l2len(res));
 	}
@@ -278,10 +203,8 @@ static int add_params(struct msgb *msg, const struct mgcp_endpoint *endp,
 
 	/* NOTE: Only in the virtual trunk we allow dynamic endpoint names */
 	if (endp->wildcarded_req
-	    && endp->tcfg->trunk_type == MGCP_TRUNK_VIRTUAL) {
-		rc = msgb_printf(msg, "Z: %s%x@%s\r\n",
-				 MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK,
-				 ENDPOINT_NUMBER(endp), endp->cfg->domain);
+	    && endp->trunk->trunk_type == MGCP_TRUNK_VIRTUAL) {
+		rc = msgb_printf(msg, "Z: %s\r\n", endp->name);
 		if (rc < 0)
 			return -EINVAL;
 	}
@@ -300,24 +223,22 @@ static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp,
 					     const char *trans_id,
 					     bool add_conn_params)
 {
-	/* TODO: we may want to define another local_ip_osmux var to us for
-	   OSMUX connections. Perhaps adding a new internal API to get it based
-	   on conn type */
-	const char *addr = endp->cfg->local_ip;
+	/* cfg->local_ip allows overwritting the announced IP address with
+	 * regards to the one we actually bind to. Useful in behind-NAT
+	 * scenarios.
+	 * TODO: we may want to define another local_ip_osmux var to
+	 * us for OSMUX connections. Perhaps adding a new internal API to get it
+	 * based on conn type.
+	 */
+	const char *addr = endp->cfg->local_ip ? : conn->end.local_addr;
 	struct msgb *sdp;
 	int rc;
 	struct msgb *result;
-	char local_ip_addr[INET_ADDRSTRLEN];
 
 	sdp = msgb_alloc_headroom(4096, 128, "sdp record");
 	if (!sdp)
 		return NULL;
 
-	if (!addr) {
-		mgcp_get_local_addr(local_ip_addr, conn);
-		addr = local_ip_addr;
-	}
-
 	/* Attach optional connection parameters */
 	if (add_conn_params) {
 		rc = add_params(sdp, endp, conn);
@@ -361,24 +282,32 @@ static void send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
  *   - or a response (three numbers, space, transaction id) */
 struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg)
 {
+	struct rate_ctr_group *rate_ctrs = cfg->ratectr.mgcp_general_ctr_group;
 	struct mgcp_parse_data pdata;
 	int rc, i, code, handled = 0;
 	struct msgb *resp = NULL;
 	char *data;
 
+	/* Count all messages, even incorect ones */
+	rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_MSGS_TOTAL]);
+
 	if (msgb_l2len(msg) < 4) {
 		LOGP(DLMGCP, LOGL_ERROR, "msg too short: %d\n", msg->len);
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_FAIL_MSG_PARSE]);
 		return NULL;
 	}
 
-	if (mgcp_msg_terminate_nul(msg))
+	if (mgcp_msg_terminate_nul(msg)) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_FAIL_MSG_PARSE]);
 		return NULL;
+	}
 
 	mgcp_disp_msg(msg->l2h, msgb_l2len(msg), "Received message");
 
 	/* attempt to treat it as a response */
 	if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) {
 		LOGP(DLMGCP, LOGL_DEBUG, "Response: Code: %d\n", code);
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_FAIL_MSG_PARSE]);
 		return NULL;
 	}
 
@@ -394,12 +323,14 @@ struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg)
 	if (pdata.endp && pdata.trans
 	    && pdata.endp->last_trans
 	    && strcmp(pdata.endp->last_trans, pdata.trans) == 0) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_MSGS_RETRANSMITTED]);
 		return do_retransmission(pdata.endp);
 	}
 
 	/* check for general parser failure */
 	if (rc < 0) {
 		LOGP(DLMGCP, LOGL_NOTICE, "%s: failed to find the endpoint\n", msg->l2h);
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_FAIL_NO_ENDPOINT]);
 		return create_err_response(NULL, -rc, (const char *) msg->l2h, pdata.trans);
 	}
 
@@ -413,9 +344,13 @@ struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg)
 		}
 	}
 
-	if (!handled)
+	if (handled) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_MSGS_HANDLED]);
+	} else {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_GENERAL_RX_MSGS_UNHANDLED]);
 		LOGP(DLMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n",
 		     &msg->l2h[0]);
+	}
 
 	return resp;
 }
@@ -435,13 +370,10 @@ static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *p)
 static int allocate_port(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
 {
 	int i;
-	struct mgcp_rtp_end *end;
 	struct mgcp_port_range *range;
 	unsigned int tries;
 
 	OSMO_ASSERT(conn);
-	end = &conn->end;
-	OSMO_ASSERT(end);
 
 	range = &endp->cfg->net_ports;
 
@@ -592,6 +524,7 @@ static int set_local_cx_options(void *ctx, struct mgcp_lco *lco,
 {
 	char *lco_id;
 	char codec[17];
+	char nt[17];
 	int len;
 
 	if (!options)
@@ -618,7 +551,7 @@ static int set_local_cx_options(void *ctx, struct mgcp_lco *lco,
 				lco->pkt_period_max = lco->pkt_period_min;
 			break;
 		case 'a':
-			/* FIXME: LCO also supports the negotiation of more then one codec.
+			/* FIXME: LCO also supports the negotiation of more than one codec.
 			 * (e.g. a:PCMU;G726-32) But this implementation only supports a single
 			 * codec only. */
 			if (sscanf(lco_id + 1, ":%16[^,]", codec) == 1) {
@@ -630,6 +563,10 @@ static int set_local_cx_options(void *ctx, struct mgcp_lco *lco,
 				osmo_str_toupper_buf(lco->codec, len + 1, codec);
 			}
 			break;
+		case 'n':
+			if (lco_id[1] == 't' && sscanf(lco_id + 2, ":%16[^,]", nt) == 1)
+				break;
+			/* else: fall throught to print notice log */
 		default:
 			LOGP(DLMGCP, LOGL_NOTICE,
 			     "LCO: unhandled option: '%c'/%d in \"%s\"\n",
@@ -659,13 +596,13 @@ static int set_local_cx_options(void *ctx, struct mgcp_lco *lco,
 void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
 			 struct mgcp_rtp_end *rtp)
 {
-	struct mgcp_trunk_config *tcfg = endp->tcfg;
+	struct mgcp_trunk *trunk = endp->trunk;
 
-	int patch_ssrc = expect_ssrc_change && tcfg->force_constant_ssrc;
+	int patch_ssrc = expect_ssrc_change && trunk->force_constant_ssrc;
 
-	rtp->force_aligned_timing = tcfg->force_aligned_timing;
+	rtp->force_aligned_timing = trunk->force_aligned_timing;
 	rtp->force_constant_ssrc = patch_ssrc ? 1 : 0;
-	rtp->rfc5993_hr_convert = tcfg->rfc5993_hr_convert;
+	rtp->rfc5993_hr_convert = trunk->rfc5993_hr_convert;
 
 	LOGPENDP(endp, DLMGCP, LOGL_DEBUG,
 		 "Configuring RTP endpoint: local port %d%s%s\n",
@@ -775,7 +712,7 @@ static bool parse_x_osmo_ign(struct mgcp_endpoint *endp, char *line)
 {
 	char *saveptr = NULL;
 
-	if (strncmp(line, MGCP_X_OSMO_IGN_HEADER, strlen(MGCP_X_OSMO_IGN_HEADER)))
+	if (strncasecmp(line, MGCP_X_OSMO_IGN_HEADER, strlen(MGCP_X_OSMO_IGN_HEADER)))
 		return false;
 	line += strlen(MGCP_X_OSMO_IGN_HEADER);
 
@@ -797,9 +734,9 @@ static bool parse_x_osmo_ign(struct mgcp_endpoint *endp, char *line)
 /* CRCX command handler, processes the received command */
 static struct msgb *handle_create_con(struct mgcp_parse_data *p)
 {
-	struct mgcp_trunk_config *tcfg = p->endp->tcfg;
+	struct mgcp_trunk *trunk = p->endp->trunk;
 	struct mgcp_endpoint *endp = p->endp;
-	struct rate_ctr_group *rate_ctrs = tcfg->mgcp_crcx_ctr_group;
+	struct rate_ctr_group *rate_ctrs = trunk->ratectr.mgcp_crcx_ctr_group;
 	int error_code = 400;
 	const char *local_options = NULL;
 	const char *callid = NULL;
@@ -813,6 +750,13 @@ static struct msgb *handle_create_con(struct mgcp_parse_data *p)
 
 	LOGPENDP(endp, DLMGCP, LOGL_NOTICE, "CRCX: creating new connection ...\n");
 
+	if (!mgcp_endp_avail(endp)) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_CRCX_FAIL_AVAIL]);
+		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+			 "CRCX: selected endpoint not available!\n");
+		return create_err_response(NULL, 501, "CRCX", p->trans);
+	}
+
 	/* parse CallID C: and LocalParameters L: */
 	for_each_line(line, p->save) {
 		if (!mgcp_check_param(endp, line))
@@ -882,7 +826,7 @@ mgcp_header_done:
 		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
 			"CRCX: endpoint full, max. %i connections allowed!\n",
 			endp->type->max_conns);
-		if (tcfg->force_realloc) {
+		if (trunk->force_realloc) {
 			/* There is no more room for a connection, make some
 			 * room by blindly tossing the oldest of the two two
 			 * connections */
@@ -901,7 +845,7 @@ mgcp_header_done:
 		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
 			 "CRCX: already seized by other call (%s)\n",
 			 endp->callid);
-		if (tcfg->force_realloc)
+		if (trunk->force_realloc)
 			/* This is not our call, toss everything by releasing
 			 * the entire endpoint. (rude!) */
 			mgcp_endp_release(endp);
@@ -913,13 +857,19 @@ mgcp_header_done:
 		}
 	}
 
-	/* Set the callid, creation of another connection will only be possible
-	 * when the callid matches up. (Connections are distinguished by their
-	 * connection ids) */
-	endp->callid = talloc_strdup(tcfg->endpoints, callid);
+	if (!endp->callid) {
+		/* Claim endpoint resources. This will also set the callid,
+		 * creating additional connections will only be possible if
+		 * the callid matches up (see above). */
+		rc = mgcp_endp_claim(endp, callid);
+		if (rc != 0) {
+			rate_ctr_inc(&rate_ctrs->ctr[MGCP_CRCX_FAIL_CLAIM]);
+			return create_err_response(endp, 502, "CRCX", p->trans);
+		}
+	}
 
 	snprintf(conn_name, sizeof(conn_name), "%s", callid);
-	_conn = mgcp_conn_alloc(tcfg->endpoints, endp, MGCP_CONN_TYPE_RTP, conn_name);
+	_conn = mgcp_conn_alloc(trunk->endpoints, endp, MGCP_CONN_TYPE_RTP, conn_name);
 	if (!_conn) {
 		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
 			 "CRCX: unable to allocate RTP connection\n");
@@ -927,6 +877,7 @@ mgcp_header_done:
 		goto error2;
 
 	}
+
 	conn = mgcp_conn_get_rtp(endp, _conn->id);
 	OSMO_ASSERT(conn);
 
@@ -954,7 +905,7 @@ mgcp_header_done:
 
 	/* Set local connection options, if present */
 	if (local_options) {
-		rc = set_local_cx_options(endp->tcfg->endpoints,
+		rc = set_local_cx_options(endp->trunk->endpoints,
 					  &endp->local_options, local_options);
 		if (rc != 0) {
 			LOGPCONN(_conn, DLMGCP, LOGL_ERROR,
@@ -974,8 +925,8 @@ mgcp_header_done:
 		goto error2;
 	}
 
-	conn->end.fmtp_extra = talloc_strdup(tcfg->endpoints,
-					     tcfg->audio_fmtp_extra);
+	conn->end.fmtp_extra = talloc_strdup(trunk->endpoints,
+					     trunk->audio_fmtp_extra);
 
 	if (p->cfg->force_ptime) {
 		conn->end.packet_duration_ms = p->cfg->force_ptime;
@@ -995,6 +946,9 @@ mgcp_header_done:
 		goto error2;
 	}
 
+	/* Find a local address for conn based on policy and initial SDP remote
+	   information, then find a free port for it */
+	mgcp_get_local_addr(conn->end.local_addr, conn);
 	if (allocate_port(endp, conn) != 0) {
 		rate_ctr_inc(&rate_ctrs->ctr[MGCP_CRCX_FAIL_BIND_PORT]);
 		goto error2;
@@ -1010,8 +964,7 @@ mgcp_header_done:
 	/* policy CB */
 	if (p->cfg->policy_cb) {
 		int rc;
-		rc = p->cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp),
-				       MGCP_ENDP_CRCX, p->trans);
+		rc = p->cfg->policy_cb(endp, MGCP_ENDP_CRCX, p->trans);
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGPCONN(_conn, DLMGCP, LOGL_NOTICE,
@@ -1033,17 +986,18 @@ mgcp_header_done:
 	LOGPCONN(conn->conn, DLMGCP, LOGL_DEBUG,
 		 "CRCX: Creating connection: port: %u\n", conn->end.local_port);
 	if (p->cfg->change_cb)
-		p->cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX);
+		p->cfg->change_cb(endp, MGCP_ENDP_CRCX);
 
 	/* Send dummy packet, see also comments in mgcp_keepalive_timer_cb() */
-	OSMO_ASSERT(tcfg->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
+	OSMO_ASSERT(trunk->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
 	if (conn->conn->mode & MGCP_CONN_RECV_ONLY
-	    && tcfg->keepalive_interval != MGCP_KEEPALIVE_NEVER)
+	    && trunk->keepalive_interval != MGCP_KEEPALIVE_NEVER)
 		send_dummy(endp, conn);
 
 	LOGPCONN(_conn, DLMGCP, LOGL_NOTICE,
 		 "CRCX: connection successfully created\n");
 	rate_ctr_inc(&rate_ctrs->ctr[MGCP_CRCX_SUCCESS]);
+	mgcp_endp_update(endp);
 	return create_response_with_sdp(endp, conn, "CRCX", p->trans, true);
 error2:
 	mgcp_endp_release(endp);
@@ -1052,16 +1006,12 @@ error2:
 	return create_err_response(endp, error_code, "CRCX", p->trans);
 }
 
-
-
-
-
 /* MDCX command handler, processes the received command */
 static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 {
-	struct mgcp_trunk_config *tcfg = p->endp->tcfg;
 	struct mgcp_endpoint *endp = p->endp;
-	struct rate_ctr_group *rate_ctrs = tcfg->mgcp_mdcx_ctr_group;
+	struct rate_ctr_group *rate_ctrs = endp->trunk->ratectr.mgcp_mdcx_ctr_group;
+	char new_local_addr[INET6_ADDRSTRLEN];
 	int error_code = 500;
 	int silent = 0;
 	int have_sdp = 0;
@@ -1075,6 +1025,13 @@ static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 
 	LOGPENDP(endp, DLMGCP, LOGL_NOTICE, "MDCX: modifying existing connection ...\n");
 
+	if (!mgcp_endp_avail(endp)) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_MDCX_FAIL_AVAIL]);
+		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+			 "MDCX: selected endpoint not available!\n");
+		return create_err_response(NULL, 501, "MDCX", p->trans);
+	}
+
 	/* Prohibit wildcarded requests */
 	if (endp->wildcarded_req) {
 		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
@@ -1169,7 +1126,7 @@ mgcp_header_done:
 
 	/* Set local connection options, if present */
 	if (local_options) {
-		rc = set_local_cx_options(endp->tcfg->endpoints,
+		rc = set_local_cx_options(endp->trunk->endpoints,
 					  &endp->local_options, local_options);
 		if (rc != 0) {
 			LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR,
@@ -1219,6 +1176,20 @@ mgcp_header_done:
 		   that conn. */
 	}
 
+	/* MDCX may have provided a new remote address, which means we may need
+	   to update our announced IP addr and re-bind our local end. This can
+	   happen for instance if MGW initially provided an IPv4 during CRCX
+	   ACK, and now MDCX tells us the remote has an IPv6 address. */
+	mgcp_get_local_addr(new_local_addr, conn);
+	if (strcmp(new_local_addr, conn->end.local_addr)) {
+		osmo_strlcpy(conn->end.local_addr, new_local_addr, sizeof(conn->end.local_addr));
+		mgcp_free_rtp_port(&conn->end);
+		if (allocate_port(endp, conn) != 0) {
+			rate_ctr_inc(&rate_ctrs->ctr[MGCP_CRCX_FAIL_BIND_PORT]);
+			goto error3;
+		}
+	}
+
 	if (setup_rtp_processing(endp, conn) != 0) {
 		rate_ctr_inc(&rate_ctrs->ctr[MGCP_MDCX_FAIL_START_RTP]);
 		goto error3;
@@ -1228,8 +1199,7 @@ mgcp_header_done:
 	/* policy CB */
 	if (p->cfg->policy_cb) {
 		int rc;
-		rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp),
-				       MGCP_ENDP_MDCX, p->trans);
+		rc = p->cfg->policy_cb(endp, MGCP_ENDP_MDCX, p->trans);
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGPCONN(conn->conn, DLMGCP, LOGL_NOTICE,
@@ -1258,13 +1228,12 @@ mgcp_header_done:
 	LOGPCONN(conn->conn, DLMGCP, LOGL_DEBUG,
 		 "MDCX: modified conn:%s\n", mgcp_conn_dump(conn->conn));
 	if (p->cfg->change_cb)
-		p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp),
-				  MGCP_ENDP_MDCX);
+		p->cfg->change_cb(endp, MGCP_ENDP_MDCX);
 
 	/* Send dummy packet, see also comments in mgcp_keepalive_timer_cb() */
-	OSMO_ASSERT(endp->tcfg->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
+	OSMO_ASSERT(endp->trunk->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
 	if (conn->conn->mode & MGCP_CONN_RECV_ONLY
-	    && endp->tcfg->keepalive_interval != MGCP_KEEPALIVE_NEVER)
+	    && endp->trunk->keepalive_interval != MGCP_KEEPALIVE_NEVER)
 		send_dummy(endp, conn);
 
 	rate_ctr_inc(&rate_ctrs->ctr[MGCP_MDCX_SUCCESS]);
@@ -1273,6 +1242,7 @@ mgcp_header_done:
 
 	LOGPCONN(conn->conn, DLMGCP, LOGL_NOTICE,
 		 "MDCX: connection successfully modified\n");
+	mgcp_endp_update(endp);
 	return create_response_with_sdp(endp, conn, "MDCX", p->trans, false);
 error3:
 	return create_err_response(endp, error_code, "MDCX", p->trans);
@@ -1285,9 +1255,8 @@ out_silent:
 /* DLCX command handler, processes the received command */
 static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 {
-	struct mgcp_trunk_config *tcfg = p->endp->tcfg;
 	struct mgcp_endpoint *endp = p->endp;
-	struct rate_ctr_group *rate_ctrs = tcfg->mgcp_dlcx_ctr_group;
+	struct rate_ctr_group *rate_ctrs = endp->trunk->ratectr.mgcp_dlcx_ctr_group;
 	int error_code = 400;
 	int silent = 0;
 	char *line;
@@ -1298,6 +1267,13 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	LOGPENDP(endp, DLMGCP, LOGL_NOTICE,
 		 "DLCX: deleting connection ...\n");
 
+	if (!mgcp_endp_avail(endp)) {
+		rate_ctr_inc(&rate_ctrs->ctr[MGCP_DLCX_FAIL_AVAIL]);
+		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
+			 "DLCX: selected endpoint not available!\n");
+		return create_err_response(NULL, 501, "DLCX", p->trans);
+	}
+
 	/* Prohibit wildcarded requests */
 	if (endp->wildcarded_req) {
 		LOGPENDP(endp, DLMGCP, LOGL_ERROR,
@@ -1348,8 +1324,7 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	/* policy CB */
 	if (p->cfg->policy_cb) {
 		int rc;
-		rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp),
-				       MGCP_ENDP_DLCX, p->trans);
+		rc = p->cfg->policy_cb(endp, MGCP_ENDP_DLCX, p->trans);
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGPENDP(endp, DLMGCP, LOGL_NOTICE, "DLCX: rejected by policy\n");
@@ -1413,8 +1388,7 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	}
 
 	if (p->cfg->change_cb)
-		p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp),
-				  MGCP_ENDP_DLCX);
+		p->cfg->change_cb(endp, MGCP_ENDP_DLCX);
 
 	rate_ctr_inc(&rate_ctrs->ctr[MGCP_DLCX_SUCCESS]);
 	if (silent)
@@ -1443,7 +1417,7 @@ static struct msgb *handle_rsip(struct mgcp_parse_data *p)
 	LOGP(DLMGCP, LOGL_NOTICE, "RSIP: resetting all endpoints ...\n");
 
 	if (p->cfg->reset_cb)
-		p->cfg->reset_cb(p->endp->tcfg);
+		p->cfg->reset_cb(p->endp->trunk);
 	return NULL;
 }
 
@@ -1489,37 +1463,37 @@ static struct msgb *handle_noti_req(struct mgcp_parse_data *p)
 
 /* Connection keepalive timer, will take care that dummy packets are send
  * regularly, so that NAT connections stay open */
-static void mgcp_keepalive_timer_cb(void *_tcfg)
+static void mgcp_keepalive_timer_cb(void *_trunk)
 {
-	struct mgcp_trunk_config *tcfg = _tcfg;
+	struct mgcp_trunk *trunk = _trunk;
 	struct mgcp_conn *conn;
 	int i;
 
 	LOGP(DLMGCP, LOGL_DEBUG, "triggered trunk %d keepalive timer\n",
-	     tcfg->trunk_nr);
+	     trunk->trunk_nr);
 
 	/* Do not accept invalid configuration values
 	 * valid is MGCP_KEEPALIVE_NEVER, MGCP_KEEPALIVE_ONCE and
 	 * values greater 0 */
-	OSMO_ASSERT(tcfg->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
+	OSMO_ASSERT(trunk->keepalive_interval >= MGCP_KEEPALIVE_ONCE);
 
 	/* The dummy packet functionality has been disabled, we will exit
 	 * immediately, no further timer is scheduled, which means we will no
 	 * longer send dummy packets even when we did before */
-	if (tcfg->keepalive_interval == MGCP_KEEPALIVE_NEVER)
+	if (trunk->keepalive_interval == MGCP_KEEPALIVE_NEVER)
 		return;
 
 	/* In cases where only one dummy packet is sent, we do not need
 	 * the timer since the functions that handle the CRCX and MDCX are
 	 * triggering the sending of the dummy packet. So we behave like in
 	 * the  MGCP_KEEPALIVE_NEVER case */
-	if (tcfg->keepalive_interval == MGCP_KEEPALIVE_ONCE)
+	if (trunk->keepalive_interval == MGCP_KEEPALIVE_ONCE)
 		return;
 
 	/* Send walk over all endpoints and send out dummy packets through
 	 * every connection present on each endpoint */
-	for (i = 1; i < tcfg->number_endpoints; ++i) {
-		struct mgcp_endpoint *endp = &tcfg->endpoints[i];
+	for (i = 1; i < trunk->number_endpoints; ++i) {
+		struct mgcp_endpoint *endp = trunk->endpoints[i];
 		llist_for_each_entry(conn, &endp->conns, entry) {
 			if (conn->mode == MGCP_CONN_RECV_ONLY)
 				send_dummy(endp, &conn->u.rtp);
@@ -1528,75 +1502,29 @@ static void mgcp_keepalive_timer_cb(void *_tcfg)
 
 	/* Schedule the keepalive timer for the next round */
 	LOGP(DLMGCP, LOGL_DEBUG, "rescheduling trunk %d keepalive timer\n",
-	     tcfg->trunk_nr);
-	osmo_timer_schedule(&tcfg->keepalive_timer, tcfg->keepalive_interval,
+	     trunk->trunk_nr);
+	osmo_timer_schedule(&trunk->keepalive_timer, trunk->keepalive_interval,
 			    0);
 }
 
-void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval)
+void mgcp_trunk_set_keepalive(struct mgcp_trunk *trunk, int interval)
 {
-	tcfg->keepalive_interval = interval;
-	osmo_timer_setup(&tcfg->keepalive_timer, mgcp_keepalive_timer_cb, tcfg);
+	trunk->keepalive_interval = interval;
+	osmo_timer_setup(&trunk->keepalive_timer, mgcp_keepalive_timer_cb, trunk);
 
 	if (interval <= 0)
-		osmo_timer_del(&tcfg->keepalive_timer);
+		osmo_timer_del(&trunk->keepalive_timer);
 	else
-		osmo_timer_schedule(&tcfg->keepalive_timer,
-				    tcfg->keepalive_interval, 0);
-}
-
-static int free_rate_counter_group(struct rate_ctr_group *rate_ctr_group)
-{
-	rate_ctr_group_free(rate_ctr_group);
-	return 0;
-}
-
-static int alloc_mgcp_rate_counters(struct mgcp_trunk_config *trunk, void *ctx)
-{
-	/* FIXME: Each new rate counter group requires a unique index. At the
-	 * moment we generate an index using a counter, but perhaps there is
-	 * a better way of assigning indices? */
-	static unsigned int crcx_rate_ctr_index = 0;
-	static unsigned int mdcx_rate_ctr_index = 0;
-	static unsigned int dlcx_rate_ctr_index = 0;
-	static unsigned int all_rtp_conn_rate_ctr_index = 0;
-
-	if (trunk->mgcp_crcx_ctr_group == NULL) {
-		trunk->mgcp_crcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_crcx_ctr_group_desc, crcx_rate_ctr_index);
-		if (!trunk->mgcp_crcx_ctr_group)
-			return -1;
-		talloc_set_destructor(trunk->mgcp_crcx_ctr_group, free_rate_counter_group);
-		crcx_rate_ctr_index++;
-	}
-	if (trunk->mgcp_mdcx_ctr_group == NULL) {
-		trunk->mgcp_mdcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_mdcx_ctr_group_desc, mdcx_rate_ctr_index);
-		if (!trunk->mgcp_mdcx_ctr_group)
-			return -1;
-		talloc_set_destructor(trunk->mgcp_mdcx_ctr_group, free_rate_counter_group);
-		mdcx_rate_ctr_index++;
-	}
-	if (trunk->mgcp_dlcx_ctr_group == NULL) {
-		trunk->mgcp_dlcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_dlcx_ctr_group_desc, dlcx_rate_ctr_index);
-		if (!trunk->mgcp_dlcx_ctr_group)
-			return -1;
-		talloc_set_destructor(trunk->mgcp_dlcx_ctr_group, free_rate_counter_group);
-		dlcx_rate_ctr_index++;
-	}
-	if (trunk->all_rtp_conn_stats == NULL) {
-		trunk->all_rtp_conn_stats = rate_ctr_group_alloc(ctx, &all_rtp_conn_rate_ctr_group_desc,
-								 all_rtp_conn_rate_ctr_index);
-		if (!trunk->all_rtp_conn_stats)
-			return -1;
-		talloc_set_destructor(trunk->all_rtp_conn_stats, free_rate_counter_group);
-		all_rtp_conn_rate_ctr_index++;
-	}
-	return 0;
+		osmo_timer_schedule(&trunk->keepalive_timer,
+				    trunk->keepalive_interval, 0);
 }
 
 /*! allocate configuration with default values.
  *  (called once at startup by main function) */
 struct mgcp_config *mgcp_config_alloc(void)
 {
+	/* FIXME: This is unrelated to the protocol, put this in some
+	 * appropiate place! */
 	struct mgcp_config *cfg;
 
 	cfg = talloc_zero(NULL, struct mgcp_config);
@@ -1620,112 +1548,19 @@ struct mgcp_config *mgcp_config_alloc(void)
 
 	cfg->get_net_downlink_format_cb = &mgcp_get_net_downlink_format_default;
 
-	/* default trunk handling */
-	cfg->trunk.cfg = cfg;
-	cfg->trunk.trunk_nr = 0;
-	cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL;
-	cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000");
-	cfg->trunk.audio_payload = 126;
-	cfg->trunk.audio_send_ptime = 1;
-	cfg->trunk.audio_send_name = 1;
-	cfg->trunk.omit_rtcp = 0;
-	mgcp_trunk_set_keepalive(&cfg->trunk, MGCP_KEEPALIVE_ONCE);
-	if (alloc_mgcp_rate_counters(&cfg->trunk, cfg) < 0) {
+	INIT_LLIST_HEAD(&cfg->trunks);
+
+	/* Allocate virtual trunk */
+	if (!mgcp_trunk_alloc(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID)) {
 		talloc_free(cfg);
 		return NULL;
 	}
 
-	INIT_LLIST_HEAD(&cfg->trunks);
+        mgcp_ratectr_global_alloc(cfg, &cfg->ratectr);
 
 	return cfg;
 }
 
-/*! allocate configuration with default values.
- *  (called once at startup by VTY)
- *  \param[in] cfg mgcp configuration
- *  \param[in] nr trunk number
- *  \returns pointer to allocated trunk configuration */
-struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr)
-{
-	struct mgcp_trunk_config *trunk;
-
-	trunk = talloc_zero(cfg, struct mgcp_trunk_config);
-	if (!trunk) {
-		LOGP(DLMGCP, LOGL_ERROR, "Failed to allocate.\n");
-		return NULL;
-	}
-
-	trunk->cfg = cfg;
-	trunk->trunk_type = MGCP_TRUNK_E1;
-	trunk->trunk_nr = nr;
-	trunk->audio_name = talloc_strdup(cfg, "AMR/8000");
-	trunk->audio_payload = 126;
-	trunk->audio_send_ptime = 1;
-	trunk->audio_send_name = 1;
-	trunk->vty_number_endpoints = 33;
-	trunk->omit_rtcp = 0;
-	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE);
-	alloc_mgcp_rate_counters(trunk, trunk);
-	llist_add_tail(&trunk->entry, &cfg->trunks);
-
-	return trunk;
-}
-
-/*! get trunk configuration by trunk number (index).
- *  \param[in] cfg mgcp configuration
- *  \param[in] index trunk number
- *  \returns pointer to trunk configuration, NULL on error */
-struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index)
-{
-	struct mgcp_trunk_config *trunk;
-
-	llist_for_each_entry(trunk, &cfg->trunks, entry)
-	    if (trunk->trunk_nr == index)
-		return trunk;
-
-	return NULL;
-}
-
-/*! allocate endpoints and set default values.
- *  (called once at startup by VTY)
- *  \param[in] tcfg trunk configuration
- *  \returns 0 on success, -1 on failure */
-int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg)
-{
-	int i;
-
-	tcfg->endpoints = _talloc_zero_array(tcfg->cfg,
-					     sizeof(struct mgcp_endpoint),
-					     tcfg->vty_number_endpoints,
-					     "endpoints");
-	if (!tcfg->endpoints)
-		return -1;
-
-	for (i = 0; i < tcfg->vty_number_endpoints; ++i) {
-		INIT_LLIST_HEAD(&tcfg->endpoints[i].conns);
-		tcfg->endpoints[i].cfg = tcfg->cfg;
-		tcfg->endpoints[i].tcfg = tcfg;
-
-		switch (tcfg->trunk_type) {
-		case MGCP_TRUNK_VIRTUAL:
-			tcfg->endpoints[i].type = &ep_typeset.rtp;
-			break;
-		case MGCP_TRUNK_E1:
-			/* FIXME: Implement E1 allocation */
-			LOGP(DLMGCP, LOGL_FATAL, "E1 trunks not implemented!\n");
-			break;
-		default:
-			osmo_panic("Cannot allocate unimplemented trunk type %d! %s:%d\n",
-				   tcfg->trunk_type, __FILE__, __LINE__);
-		}
-	}
-
-	tcfg->number_endpoints = tcfg->vty_number_endpoints;
-	alloc_mgcp_rate_counters(tcfg, tcfg->cfg);
-
-	return 0;
-}
-
 static int send_agent(struct mgcp_config *cfg, const char *buf, int len)
 {
 	return write(cfg->gw_fd.bfd.fd, buf, len);
@@ -1756,17 +1591,16 @@ int mgcp_send_reset_all(struct mgcp_config *cfg)
 
 /*! Reset a single endpoint by sending RSIP message to self.
  *  (called by VTY)
- *  \param[in] endp trunk endpoint
- *  \param[in] endpoint number
+ *  \param[in] endp to reset
  *  \returns 0 on success, -1 on error */
-int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint)
+int mgcp_send_reset_ep(struct mgcp_endpoint *endp)
 {
 	char buf[MGCP_ENDPOINT_MAXLEN + 128];
 	int len;
 	int rc;
 
 	len = snprintf(buf, sizeof(buf),
-		       "RSIP 39 %x@%s MGCP 1.0\r\n", endpoint, endp->cfg->domain);
+		       "RSIP 39 %s MGCP 1.0\r\n", endp->name);
 	if (len < 0)
 		return -1;
 

src/libosmo-mgcp/mgcp_ratectr.c

@@ -0,0 +1,229 @@
+/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
+/* rate-counter implementation */
+
+/*
+ * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009-2012 by On-Waves
+ * (C) 2017-2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <errno.h>
+#include <osmocom/core/stats.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/mgcp/mgcp_ratectr.h>
+
+static const struct rate_ctr_desc mgcp_general_ctr_desc[] = {
+	/* rx_msgs = rx_msgs_retransmitted + rx_msgs_handled + rx_msgs_unhandled + err_rx_msg_parse + err_rx_no_endpoint */
+	[MGCP_GENERAL_RX_MSGS_TOTAL] = { "mgcp:rx_msgs", "total number of MGCP messages received." },
+	[MGCP_GENERAL_RX_MSGS_RETRANSMITTED] = { "mgcp:rx_msgs_retransmitted", "number of received retransmissions." },
+	[MGCP_GENERAL_RX_MSGS_HANDLED] = { "mgcp:rx_msgs_handled", "number of handled MGCP messages." },
+	[MGCP_GENERAL_RX_MSGS_UNHANDLED] = { "mgcp:rx_msgs_unhandled", "number of unhandled MGCP messages." },
+	[MGCP_GENERAL_RX_FAIL_MSG_PARSE] = { "mgcp:err_rx_msg_parse", "error parsing MGCP message." },
+	[MGCP_GENERAL_RX_FAIL_NO_ENDPOINT] =
+	    { "mgcp:err_rx_no_endpoint", "can't find MGCP endpoint, probably we've used all allocated endpoints." },
+};
+
+const static struct rate_ctr_group_desc mgcp_general_ctr_group_desc = {
+	.group_name_prefix = "mgcp",
+	.group_description = "mgcp general statistics",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_ctr = ARRAY_SIZE(mgcp_general_ctr_desc),
+	.ctr_desc = mgcp_general_ctr_desc
+};
+
+static const struct rate_ctr_desc mgcp_crcx_ctr_desc[] = {
+	[MGCP_CRCX_SUCCESS] = { "crcx:success", "CRCX command processed successfully." },
+	[MGCP_CRCX_FAIL_BAD_ACTION] = { "crcx:bad_action", "bad action in CRCX command." },
+	[MGCP_CRCX_FAIL_UNHANDLED_PARAM] = { "crcx:unhandled_param", "unhandled parameter in CRCX command." },
+	[MGCP_CRCX_FAIL_MISSING_CALLID] = { "crcx:missing_callid", "missing CallId in CRCX command." },
+	[MGCP_CRCX_FAIL_INVALID_MODE] = { "crcx:invalid_mode", "invalid connection mode in CRCX command." },
+	[MGCP_CRCX_FAIL_LIMIT_EXCEEDED] = { "crcx:limit_exceeded", "limit of concurrent connections was reached." },
+	[MGCP_CRCX_FAIL_UNKNOWN_CALLID] = { "crcx:unkown_callid", "unknown CallId in CRCX command." },
+	[MGCP_CRCX_FAIL_ALLOC_CONN] = { "crcx:alloc_conn_fail", "connection allocation failure." },
+	[MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC] =
+	    { "crcx:no_remote_conn_desc", "no opposite end specified for connection." },
+	[MGCP_CRCX_FAIL_START_RTP] = { "crcx:start_rtp_failure", "failure to start RTP processing." },
+	[MGCP_CRCX_FAIL_REJECTED_BY_POLICY] = { "crcx:conn_rejected", "connection rejected by policy." },
+	[MGCP_CRCX_FAIL_NO_OSMUX] = { "crcx:no_osmux", "no osmux offered by peer." },
+	[MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS] = { "crcx:conn_opt", "connection options invalid." },
+	[MGCP_CRCX_FAIL_CODEC_NEGOTIATION] = { "crcx:codec_nego", "codec negotiation failure." },
+	[MGCP_CRCX_FAIL_BIND_PORT] = { "crcx:bind_port", "port bind failure." },
+	[MGCP_CRCX_FAIL_AVAIL] = { "crcx:unavailable", "endpoint unavailable." },
+	[MGCP_CRCX_FAIL_CLAIM] = { "crcx:claim", "endpoint can not be claimed." },
+};
+
+const static struct rate_ctr_group_desc mgcp_crcx_ctr_group_desc = {
+	.group_name_prefix = "crcx",
+	.group_description = "crxc statistics",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_ctr = ARRAY_SIZE(mgcp_crcx_ctr_desc),
+	.ctr_desc = mgcp_crcx_ctr_desc
+};
+
+static const struct rate_ctr_desc mgcp_mdcx_ctr_desc[] = {
+	[MGCP_MDCX_SUCCESS] = { "mdcx:success", "MDCX command processed successfully." },
+	[MGCP_MDCX_FAIL_WILDCARD] = { "mdcx:wildcard", "wildcard endpoint names in MDCX commands are unsupported." },
+	[MGCP_MDCX_FAIL_NO_CONN] = { "mdcx:no_conn", "endpoint specified in MDCX command has no active connections." },
+	[MGCP_MDCX_FAIL_INVALID_CALLID] = { "mdcx:callid", "invalid CallId specified in MDCX command." },
+	[MGCP_MDCX_FAIL_INVALID_CONNID] = { "mdcx:connid", "invalid connection ID specified in MDCX command." },
+	[MGCP_MDCX_FAIL_UNHANDLED_PARAM] = { "crcx:unhandled_param", "unhandled parameter in MDCX command." },
+	[MGCP_MDCX_FAIL_NO_CONNID] = { "mdcx:no_connid", "no connection ID specified in MDCX command." },
+	[MGCP_MDCX_FAIL_CONN_NOT_FOUND] =
+	    { "mdcx:conn_not_found", "connection specified in MDCX command does not exist." },
+	[MGCP_MDCX_FAIL_INVALID_MODE] = { "mdcx:invalid_mode", "invalid connection mode in MDCX command." },
+	[MGCP_MDCX_FAIL_INVALID_CONN_OPTIONS] = { "mdcx:conn_opt", "connection options invalid." },
+	[MGCP_MDCX_FAIL_NO_REMOTE_CONN_DESC] =
+	    { "mdcx:no_remote_conn_desc", "no opposite end specified for connection." },
+	[MGCP_MDCX_FAIL_START_RTP] = { "mdcx:start_rtp_failure", "failure to start RTP processing." },
+	[MGCP_MDCX_FAIL_REJECTED_BY_POLICY] = { "mdcx:conn_rejected", "connection rejected by policy." },
+	[MGCP_MDCX_DEFERRED_BY_POLICY] = { "mdcx:conn_deferred", "connection deferred by policy." },
+	[MGCP_MDCX_FAIL_AVAIL] = { "mdcx:unavailable", "endpoint unavailable." },
+};
+
+const static struct rate_ctr_group_desc mgcp_mdcx_ctr_group_desc = {
+	.group_name_prefix = "mdcx",
+	.group_description = "mdcx statistics",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_ctr = ARRAY_SIZE(mgcp_mdcx_ctr_desc),
+	.ctr_desc = mgcp_mdcx_ctr_desc
+};
+
+static const struct rate_ctr_desc mgcp_dlcx_ctr_desc[] = {
+	[MGCP_DLCX_SUCCESS] = { "dlcx:success", "DLCX command processed successfully." },
+	[MGCP_DLCX_FAIL_WILDCARD] = { "dlcx:wildcard", "wildcard names in DLCX commands are unsupported." },
+	[MGCP_DLCX_FAIL_NO_CONN] = { "dlcx:no_conn", "endpoint specified in DLCX command has no active connections." },
+	[MGCP_DLCX_FAIL_INVALID_CALLID] =
+	    { "dlcx:callid", "CallId specified in DLCX command mismatches endpoint's CallId ." },
+	[MGCP_DLCX_FAIL_INVALID_CONNID] =
+	    { "dlcx:connid", "connection ID specified in DLCX command does not exist on endpoint." },
+	[MGCP_DLCX_FAIL_UNHANDLED_PARAM] = { "dlcx:unhandled_param", "unhandled parameter in DLCX command." },
+	[MGCP_DLCX_FAIL_REJECTED_BY_POLICY] = { "dlcx:rejected", "connection deletion rejected by policy." },
+	[MGCP_DLCX_DEFERRED_BY_POLICY] = { "dlcx:deferred", "connection deletion deferred by policy." },
+	[MGCP_DLCX_FAIL_AVAIL] = { "dlcx:unavailable", "endpoint unavailable." },
+};
+
+const static struct rate_ctr_group_desc mgcp_dlcx_ctr_group_desc = {
+	.group_name_prefix = "dlcx",
+	.group_description = "dlcx statistics",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_ctr = ARRAY_SIZE(mgcp_dlcx_ctr_desc),
+	.ctr_desc = mgcp_dlcx_ctr_desc
+};
+
+static const struct rate_ctr_desc e1_rate_ctr_desc[] = {
+	[E1_I460_TRAU_RX_FAIL_CTR] = {"e1:rx_fail", "Inbound I.460 TRAU failures."},
+	[E1_I460_TRAU_TX_FAIL_CTR] = {"e1:tx_fail", "Outbound I.460 TRAU failures."},
+	[E1_I460_TRAU_MUX_EMPTY_CTR] = {"e1:i460", "Outbound I.460 MUX queue empty."}
+};
+
+const static struct rate_ctr_group_desc e1_rate_ctr_group_desc = {
+	.group_name_prefix = "e1",
+	.group_description = "e1 statistics",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_ctr = ARRAY_SIZE(e1_rate_ctr_desc),
+	.ctr_desc = e1_rate_ctr_desc
+};
+
+const static struct rate_ctr_group_desc all_rtp_conn_rate_ctr_group_desc = {
+	.group_name_prefix = "all_rtp_conn",
+	.group_description = "aggregated statistics for all rtp connections",
+	.class_id = 1,
+	.num_ctr = ARRAY_SIZE(all_rtp_conn_rate_ctr_desc),
+	.ctr_desc = all_rtp_conn_rate_ctr_desc
+};
+
+static int free_rate_counter_group(struct rate_ctr_group *rate_ctr_group)
+{
+	rate_ctr_group_free(rate_ctr_group);
+	return 0;
+}
+
+/*! allocate global rate counters into a given rate counter struct
+ *  (called once at startup)
+ *  \param[in] ctx talloc context.
+ *  \param[out] ratectr struct that holds the counters
+ *  \returns 0 on success, -EINVAL on failure */
+int mgcp_ratectr_global_alloc(void *ctx, struct mgcp_ratectr_global *ratectr)
+{
+	/* FIXME: Each new rate counter group requires a unique index. At the
+	 * moment we generate an index using a counter, but perhaps there is
+	 * a better way of assigning indices? */
+	static unsigned int general_rate_ctr_index = 0;
+
+	if (ratectr->mgcp_general_ctr_group == NULL) {
+		ratectr->mgcp_general_ctr_group =
+		    rate_ctr_group_alloc(ctx, &mgcp_general_ctr_group_desc, general_rate_ctr_index);
+		if (!ratectr->mgcp_general_ctr_group)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->mgcp_general_ctr_group, free_rate_counter_group);
+		general_rate_ctr_index++;
+	}
+	return 0;
+}
+
+/*! allocate trunk specific rate counters into a given rate counter struct
+ *  (called once on trunk initialization)
+ *  \param[in] ctx talloc context.
+ *  \param[out] ratectr struct that holds the counters
+ *  \returns 0 on success, -EINVAL on failure */
+int mgcp_ratectr_trunk_alloc(void *ctx, struct mgcp_ratectr_trunk *ratectr)
+{
+	/* FIXME: see comment in mgcp_ratectr_global_alloc()  */
+	static unsigned int crcx_rate_ctr_index = 0;
+	static unsigned int mdcx_rate_ctr_index = 0;
+	static unsigned int dlcx_rate_ctr_index = 0;
+	static unsigned int all_rtp_conn_rate_ctr_index = 0;
+
+	if (ratectr->mgcp_crcx_ctr_group == NULL) {
+		ratectr->mgcp_crcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_crcx_ctr_group_desc, crcx_rate_ctr_index);
+		if (!ratectr->mgcp_crcx_ctr_group)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->mgcp_crcx_ctr_group, free_rate_counter_group);
+		crcx_rate_ctr_index++;
+	}
+	if (ratectr->mgcp_mdcx_ctr_group == NULL) {
+		ratectr->mgcp_mdcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_mdcx_ctr_group_desc, mdcx_rate_ctr_index);
+		if (!ratectr->mgcp_mdcx_ctr_group)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->mgcp_mdcx_ctr_group, free_rate_counter_group);
+		mdcx_rate_ctr_index++;
+	}
+	if (ratectr->mgcp_dlcx_ctr_group == NULL) {
+		ratectr->mgcp_dlcx_ctr_group = rate_ctr_group_alloc(ctx, &mgcp_dlcx_ctr_group_desc, dlcx_rate_ctr_index);
+		if (!ratectr->mgcp_dlcx_ctr_group)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->mgcp_dlcx_ctr_group, free_rate_counter_group);
+		dlcx_rate_ctr_index++;
+	}
+	if (ratectr->all_rtp_conn_stats == NULL) {
+		ratectr->all_rtp_conn_stats = rate_ctr_group_alloc(ctx, &all_rtp_conn_rate_ctr_group_desc,
+								 all_rtp_conn_rate_ctr_index);
+		if (!ratectr->all_rtp_conn_stats)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->all_rtp_conn_stats, free_rate_counter_group);
+		all_rtp_conn_rate_ctr_index++;
+	}
+	if (ratectr->e1_stats == NULL) {
+		ratectr->e1_stats = rate_ctr_group_alloc(ctx, &e1_rate_ctr_group_desc, mdcx_rate_ctr_index);
+		if (!ratectr->e1_stats)
+			return -EINVAL;
+		talloc_set_destructor(ratectr->e1_stats, free_rate_counter_group);
+		mdcx_rate_ctr_index++;
+	}
+	return 0;
+}

src/libosmo-mgcp/mgcp_sdp.c

@@ -21,12 +21,19 @@
  */
 
 #include <osmocom/core/msgb.h>
+#include <osmocom/core/socket.h>
+#include <osmocom/core/sockaddr_str.h>
+
 #include <osmocom/mgcp/mgcp.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/osmux.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_msg.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
 #include <osmocom/mgcp/mgcp_codec.h>
 #include <osmocom/mgcp/mgcp_sdp.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 
 #include <errno.h>
 #include <stdlib.h>
@@ -255,6 +262,42 @@ error:
 	return -EINVAL;
 }
 
+
+static int audio_ip_from_sdp(struct osmo_sockaddr *dst_addr, char *sdp)
+{
+	bool is_ipv6;
+	char ipbuf[INET6_ADDRSTRLEN];
+	if (strncmp("c=IN IP", sdp, 7) != 0)
+		return -1;
+	sdp += 7;
+	if (*sdp == '6')
+	       is_ipv6 = true;
+	else if (*sdp == '4')
+	       is_ipv6 = false;
+	else
+	       return -1;
+	sdp++;
+	if (*sdp != ' ')
+		return -1;
+	sdp++;
+	if (is_ipv6) {
+		/* 45 = INET6_ADDRSTRLEN -1 */
+		if (sscanf(sdp, "%45s", ipbuf) != 1)
+			return -1;
+		if (inet_pton(AF_INET6, ipbuf, &dst_addr->u.sin6.sin6_addr) != 1)
+			return -1;
+		dst_addr->u.sa.sa_family = AF_INET6;
+	} else {
+		/* 15 = INET_ADDRSTRLEN -1 */
+		if (sscanf(sdp, "%15s", ipbuf) != 1)
+			return -1;
+		if (inet_pton(AF_INET, ipbuf, &dst_addr->u.sin.sin_addr) != 1)
+			return -1;
+		dst_addr->u.sa.sa_family = AF_INET;
+	}
+	return 0;
+}
+
 /* Pick optional fmtp parameters by payload type, if there are no fmtp
  * parameters, a nullpointer is returned */
 static struct mgcp_codec_param *param_by_pt(int pt, struct sdp_fmtp_param *fmtp_params, unsigned int fmtp_params_len)
@@ -285,6 +328,7 @@ int mgcp_parse_sdp_data(const struct mgcp_endpoint *endp,
 	struct sdp_fmtp_param fmtp_params[MGCP_MAX_CODECS];
 	unsigned int fmtp_used = 0;
 	struct mgcp_codec_param *codec_param;
+	char ipbuf[INET6_ADDRSTRLEN];
 	char *line;
 	unsigned int i;
 	void *tmp_ctx = talloc_new(NULL);
@@ -294,7 +338,6 @@ int mgcp_parse_sdp_data(const struct mgcp_endpoint *endp,
 	int ptime, ptime2 = 0;
 	char audio_name[64];
 	int port, rc;
-	char ipv4[16];
 
 	OSMO_ASSERT(endp);
 	OSMO_ASSERT(conn);
@@ -351,17 +394,16 @@ int mgcp_parse_sdp_data(const struct mgcp_endpoint *endp,
 				codecs_used = rc;
 			break;
 		case 'c':
-
-			if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) {
-				inet_aton(ipv4, &rtp->addr);
-			}
+			if (audio_ip_from_sdp(&rtp->addr, line) < 0)
+				return -1;
 			break;
 		default:
 			if (p->endp)
+				/* TODO: Check spec: We used the bare endpoint number before,
+				 * now we use the endpoint name as a whole? Is this allowed? */
 				LOGP(DLMGCP, LOGL_NOTICE,
-				     "Unhandled SDP option: '%c'/%d on 0x%x\n",
-				     line[0], line[0],
-				     ENDPOINT_NUMBER(p->endp));
+				     "Unhandled SDP option: '%c'/%d on %s\n",
+				     line[0], line[0], endp->name);
 			else
 				LOGP(DLMGCP, LOGL_NOTICE,
 				     "Unhandled SDP option: '%c'/%d\n",
@@ -381,14 +423,14 @@ int mgcp_parse_sdp_data(const struct mgcp_endpoint *endp,
 		codec_param = param_by_pt(codecs[i].payload_type, fmtp_params, fmtp_used);
 		rc = mgcp_codec_add(conn, codecs[i].payload_type, codecs[i].map_line, codec_param);
 		if (rc < 0)
-			LOGP(DLMGCP, LOGL_NOTICE, "endpoint:0x%x, failed to add codec\n", ENDPOINT_NUMBER(p->endp));
+			LOGPENDP(endp, DLMGCP, LOGL_NOTICE, "failed to add codec\n");
 	}
 
 	talloc_free(tmp_ctx);
 
 	LOGPCONN(conn->conn, DLMGCP, LOGL_NOTICE,
 	     "Got media info via SDP: port:%d, addr:%s, duration:%d, payload-types:",
-	     ntohs(rtp->rtp_port), inet_ntoa(rtp->addr),
+	     ntohs(rtp->rtp_port), osmo_sockaddr_ntop(&rtp->addr.u.sa, ipbuf),
 	     rtp->packet_duration_ms);
 	if (codecs_used == 0)
 		LOGPC(DLMGCP, LOGL_NOTICE, "none");
@@ -476,6 +518,8 @@ static int add_fmtp(struct msgb *sdp, struct sdp_fmtp_param *fmtp_params, unsign
 
 	for (i = 0; i < fmtp_params_len; i++) {
 		rc = msgb_printf(sdp, "a=fmtp:%u", fmtp_params[i].payload_type);
+		if (rc < 0)
+			return -EINVAL;
 
 		/* Add amr octet align parameter */
 		if (fmtp_params[i].param.amr_octet_aligned_present) {
@@ -494,7 +538,7 @@ static int add_fmtp(struct msgb *sdp, struct sdp_fmtp_param *fmtp_params, unsign
 				return -EINVAL;
 		}
 
-		rc = msgb_printf(sdp, "\r\n", fmtp_params[i].payload_type);
+		rc = msgb_printf(sdp, "\r\n");
 		if (rc < 0)
 			return -EINVAL;
 	}
@@ -522,6 +566,7 @@ int mgcp_write_response_sdp(const struct mgcp_endpoint *endp,
 	int local_port;
 	struct sdp_fmtp_param fmtp_params[1];
         unsigned int fmtp_params_len = 0;
+	bool addr_is_v6;
 
 	OSMO_ASSERT(endp);
 	OSMO_ASSERT(conn);
@@ -536,12 +581,16 @@ int mgcp_write_response_sdp(const struct mgcp_endpoint *endp,
 	audio_name = codec->audio_name;
 	payload_type = codec->payload_type;
 
+	addr_is_v6 = osmo_ip_str_type(addr) == AF_INET6;
+
 	rc = msgb_printf(sdp,
 			 "v=0\r\n"
-			 "o=- %s 23 IN IP4 %s\r\n"
+			 "o=- %s 23 IN IP%c %s\r\n"
 			 "s=-\r\n"
-			 "c=IN IP4 %s\r\n"
-			 "t=0 0\r\n", conn->conn->id, addr, addr);
+			 "c=IN IP%c %s\r\n"
+			 "t=0 0\r\n", conn->conn->id,
+			 addr_is_v6 ? '6' : '4', addr,
+			 addr_is_v6 ? '6' : '4', addr);
 
 	if (rc < 0)
 		goto buffer_too_small;
@@ -557,7 +606,7 @@ int mgcp_write_response_sdp(const struct mgcp_endpoint *endp,
 		if (rc < 0)
 			goto buffer_too_small;
 
-		if (endp->tcfg->audio_send_name) {
+		if (endp->trunk->audio_send_name) {
 			rc = add_rtpmap(sdp, payload_type, audio_name);
 			if (rc < 0)
 				goto buffer_too_small;
@@ -573,7 +622,7 @@ int mgcp_write_response_sdp(const struct mgcp_endpoint *endp,
 		if (rc < 0)
 			goto buffer_too_small;
 	}
-	if (conn->end.packet_duration_ms > 0 && endp->tcfg->audio_send_ptime) {
+	if (conn->end.packet_duration_ms > 0 && endp->trunk->audio_send_ptime) {
 		rc = msgb_printf(sdp, "a=ptime:%u\r\n",
 				 conn->end.packet_duration_ms);
 		if (rc < 0)

src/libosmo-mgcp/mgcp_stat.c

@@ -22,10 +22,12 @@
  *
  */
 
-#include <osmocom/mgcp/mgcp_stat.h>
-#include <osmocom/mgcp/mgcp_endp.h>
 #include <limits.h>
 #include <inttypes.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/mgcp/mgcp_stat.h>
+#include <osmocom/mgcp/mgcp_endp.h>
 
 /* Helper function for mgcp_format_stats_rtp() to calculate packet loss */
 void calc_loss(struct mgcp_conn_rtp *conn, uint32_t *expected, int *loss)

src/libosmo-mgcp/mgcp_trunk.c

@@ -0,0 +1,255 @@
+/* Trunk handling */
+
+/*
+ * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009-2012 by On-Waves
+ * (C) 2017-2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <osmocom/mgcp/mgcp.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
+#include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
+#include <osmocom/mgcp/mgcp_e1.h>
+#include <osmocom/abis/e1_input.h>
+
+/*! allocate trunk and add it (if required) to the trunk list.
+ *  (called once at startup by VTY).
+ *  \param[in] cfg mgcp configuration.
+ *  \param[in] ttype trunk type.
+ *  \param[in] nr trunk number.
+ *  \returns pointer to allocated trunk, NULL on failure. */
+struct mgcp_trunk *mgcp_trunk_alloc(struct mgcp_config *cfg, enum mgcp_trunk_type ttype, int nr)
+{
+	struct mgcp_trunk *trunk;
+
+	trunk = talloc_zero(cfg, struct mgcp_trunk);
+	if (!trunk) {
+		LOGP(DLMGCP, LOGL_ERROR, "Failed to allocate.\n");
+		return NULL;
+	}
+
+	trunk->cfg = cfg;
+	trunk->trunk_type = ttype;
+	trunk->trunk_nr = nr;
+
+	trunk->audio_send_ptime = 1;
+	trunk->audio_send_name = 1;
+	trunk->v.vty_number_endpoints = 512;
+	trunk->omit_rtcp = 0;
+
+	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE);
+
+	llist_add_tail(&trunk->entry, &cfg->trunks);
+
+        mgcp_ratectr_trunk_alloc(cfg, &trunk->ratectr);
+
+	return trunk;
+}
+
+/*! allocate endpoints and set default values
+ *  (called once at startup by VTY).
+ *  \param[in] trunk trunk configuration.
+ *  \returns 0 on success, -1 on failure. */
+int mgcp_trunk_alloc_endpts(struct mgcp_trunk *trunk)
+{
+	int i;
+	struct mgcp_endpoint *endp;
+	unsigned int number_endpoints;
+	unsigned int first_endpoint_nr;
+
+	/* This function is called once on startup by the VTY to allocate the
+	 * endpoints. The number of endpoints must not change througout the
+	 * runtime of the MGW */
+	OSMO_ASSERT(trunk->number_endpoints == 0);
+	OSMO_ASSERT(trunk->endpoints == NULL);
+
+	switch (trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		/* Due to historical reasons the endpoints on the virtual
+		 * trunk start counting at 1. */
+		first_endpoint_nr = 1;
+		number_endpoints = trunk->v.vty_number_endpoints;
+		break;
+	case MGCP_TRUNK_E1:
+		/* The first timeslot on an E1 line is reserved for framing
+		 * and alignment and can not be used for audio transport */
+	        first_endpoint_nr = 1 * MGCP_ENDP_E1_SUBSLOTS;
+		number_endpoints = (NUM_E1_TS-1) * MGCP_ENDP_E1_SUBSLOTS;
+		break;
+	default:
+		OSMO_ASSERT(false);
+	}
+
+	/* Make sure the amount of requested endpoints does not execeed
+	 * sane limits. The VTY already limits the possible amount,
+	 * however miss-initialization of the struct or memory corruption
+	 * could still lead to an excessive allocation of endpoints, so
+	 * better stop early if that is the case. */
+	OSMO_ASSERT(number_endpoints < 65534);
+
+	/* allocate pointer array for the endpoints */
+	trunk->endpoints = talloc_zero_array(trunk->cfg, struct mgcp_endpoint*,
+					     number_endpoints);
+	if (!trunk->endpoints)
+		return -1;
+
+	/* create endpoints */
+	for (i = 0; i < number_endpoints; i++) {
+		endp = mgcp_endp_alloc(trunk, i + first_endpoint_nr);
+		if (!endp) {
+			talloc_free(trunk->endpoints);
+			return -1;
+		}
+		trunk->endpoints[i] = endp;
+	}
+
+	/* make the endpoints we just created available to the MGW code */
+	trunk->number_endpoints = number_endpoints;
+
+	return 0;
+}
+
+/*! Equip trunk with endpoints and resources
+ *  (called once at startup by VTY).
+ *  \param[in] trunk trunk configuration.
+ *  \returns 0 on success, -1 on failure. */
+int mgcp_trunk_equip(struct mgcp_trunk *trunk)
+{
+	unsigned int i;
+
+	/* Allocate endpoints */
+	if(mgcp_trunk_alloc_endpts(trunk) != 0)
+		return -1;
+
+	/* Allocate resources */
+	switch (trunk->trunk_type) {
+	case MGCP_TRUNK_VIRTUAL:
+		/* No additional initaliziation required here, virtual
+		 * endpoints will open/close network sockets themselves
+		 * on demand. */
+		break;
+	case MGCP_TRUNK_E1:
+		/* The TS initalization happens once on startup for all
+		 * timeslots. This only affects the i460 multiplexer. Until
+		 * now no E1 resources are claimed yet. This happens on demand
+		 * when the related endpoint is actually used */
+		memset(trunk->e1.i460_ts, 0, sizeof(trunk->e1.i460_ts));
+		for (i = 0; i < (NUM_E1_TS-1); i++)
+			osmo_i460_ts_init(&trunk->e1.i460_ts[i]);
+		break;
+	default:
+		OSMO_ASSERT(false);
+	}
+
+	return 0;
+}
+
+/*! get trunk configuration by trunk number (index).
+ *  \param[in] cfg mgcp configuration.
+ *  \param[in] ttype trunk type.
+ *  \param[in] nr trunk number.
+ *  \returns pointer to trunk configuration, NULL on error. */
+struct mgcp_trunk *mgcp_trunk_by_num(const struct mgcp_config *cfg, enum mgcp_trunk_type ttype, int nr)
+{
+	struct mgcp_trunk *trunk;
+
+	llist_for_each_entry(trunk, &cfg->trunks, entry) {
+		if (trunk->trunk_nr == nr && trunk->trunk_type == ttype)
+			return trunk;
+	}
+
+	return NULL;
+}
+
+/* Made public for unit-testing, do not use from outside this file */
+int e1_trunk_nr_from_epname(const char *epname)
+{
+	unsigned long int trunk_nr;
+	size_t prefix_len;
+	char *str_trunk_nr_end;
+
+	prefix_len = sizeof(MGCP_ENDPOINT_PREFIX_E1_TRUNK) - 1;
+	if (strncmp(epname, MGCP_ENDPOINT_PREFIX_E1_TRUNK, prefix_len) != 0)
+		return -EINVAL;
+
+	errno = 0;
+	trunk_nr = strtoul(epname + prefix_len, &str_trunk_nr_end, 10);
+	if (errno == ERANGE || trunk_nr > 64
+	    || epname + prefix_len == str_trunk_nr_end
+	    || str_trunk_nr_end[0] != '/')
+		return -EINVAL;
+	else
+		return trunk_nr;
+}
+
+/*! Find a trunk by the trunk prefix in the endpoint name.
+ *  \param[in] epname endpoint name with trunk prefix to look up.
+ *  \param[in] cfg that contains the trunks where the endpoint is located.
+ *  \returns trunk or NULL if trunk was not found. */
+struct mgcp_trunk *mgcp_trunk_by_name(const struct mgcp_config *cfg, const char *epname)
+{
+	size_t prefix_len;
+	char epname_lc[MGCP_ENDPOINT_MAXLEN];
+	int trunk_nr;
+
+	osmo_str_tolower_buf(epname_lc, sizeof(epname_lc), epname);
+	epname = epname_lc;
+
+	prefix_len = sizeof(MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK) - 1;
+	if (strncmp(epname, MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK, prefix_len) == 0) {
+		return mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
+	}
+
+	trunk_nr = e1_trunk_nr_from_epname(epname);
+	if (trunk_nr >= 0)
+		return mgcp_trunk_by_num(cfg, MGCP_TRUNK_E1, trunk_nr);
+
+	/* Earlier versions of osmo-mgw were accepting endpoint names
+	 * without trunk prefix. This is normally not allowed, each MGCP
+	 * request should supply an endpoint name with trunk prefix.
+	 * However in order to stay compatible with old versions of
+	 * osmo-bsc and osmo-msc we still accept endpoint names without
+	 * trunk prefix and just assume that the virtual trunk should
+	 * be selected. There is even a TTCN3 test for this, see also:
+	 * MGCP_Test.TC_crcx_noprefix */
+	if ((epname[0] >= '0' && epname[0] <= '9') || (epname[0] >= 'a' && epname[0] <= 'f')) {
+		LOGP(DLMGCP, LOGL_ERROR, "missing trunk prefix in endpoint name \"%s\", assuming trunk \"%s\"!\n", epname,
+		     MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK);
+		return  mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
+	}
+
+	LOGP(DLMGCP, LOGL_ERROR, "unable to find trunk for endpoint name \"%s\"!\n", epname);
+	return NULL;
+}
+
+/*! Find a trunk (E1) by its associated E1 line number.
+ *  \param[in] num e1 line number.
+ *  \returns trunk or NULL if trunk was not found. */
+struct mgcp_trunk *mgcp_trunk_by_line_num(const struct mgcp_config *cfg, unsigned int num)
+{
+	/*! When used on trunks other than E1, the result will always be NULL. */
+	struct mgcp_trunk *trunk;
+
+	llist_for_each_entry(trunk, &cfg->trunks, entry) {
+		if (trunk->trunk_type == MGCP_TRUNK_E1 && trunk->e1.vty_line_nr == num)
+			return trunk;
+	}
+
+	return NULL;
+}

src/osmo-mgw/Makefile.am

@@ -9,7 +9,10 @@ AM_CFLAGS = \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOVTY_CFLAGS) \
 	$(LIBOSMOGSM_CFLAGS) \
+	$(LIBOSMOCTRL_CFLAGS) \
 	$(LIBOSMONETIF_CFLAGS) \
+	$(LIBOSMOABIS_CFLAGS) \
+	$(LIBOSMOTRAU_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
 	$(NULL)
 
@@ -26,5 +29,8 @@ osmo_mgw_LDADD = \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBOSMOGSM_LIBS) \
+	$(LIBOSMOCTRL_LIBS) \
 	$(LIBOSMONETIF_LIBS) \
+	$(LIBOSMOABIS_LIBS) \
+	$(LIBOSMOTRAU_LIBS) \
 	$(NULL)

src/osmo-mgw/mgw_main.c

@@ -30,14 +30,18 @@
 #include <limits.h>
 #include <unistd.h>
 #include <errno.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/abis/e1_input.h>
 
 #include <sys/socket.h>
 
 #include <osmocom/mgcp/mgcp.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/vty.h>
 #include <osmocom/mgcp/debug.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
+#include <osmocom/mgcp/mgcp_ctrl.h>
 
 #include <osmocom/core/application.h>
 #include <osmocom/core/msgb.h>
@@ -48,22 +52,32 @@
 #include <osmocom/core/logging.h>
 #include <osmocom/core/socket.h>
 
+#include <osmocom/ctrl/control_vty.h>
+
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 #include <osmocom/vty/ports.h>
 #include <osmocom/vty/command.h>
 #include <osmocom/vty/stats.h>
 #include <osmocom/vty/misc.h>
+#include <osmocom/vty/cpu_sched_vty.h>
+
+#include <osmocom/abis/abis.h>
 
 #include "../../bscconfig.h"
 
 #define _GNU_SOURCE
 #include <getopt.h>
 
+/* can be changed once libosmocore 1.4.0 is released */
+#ifndef OSMO_CTRL_PORT_MGW
+#define OSMO_CTRL_PORT_MGW 4267
+#endif
+
 /* FIXME: Make use of the rtp proxy code */
 
 static struct mgcp_config *cfg;
-static struct mgcp_trunk_config *reset_trunk;
+static struct mgcp_trunk *reset_trunk;
 static int reset_endpoints = 0;
 static int daemonize = 0;
 
@@ -79,7 +93,7 @@ const char *osmomgw_copyright =
 static char *config_file = "osmo-mgw.cfg";
 
 /* used by msgb and mgcp */
-void *tall_bsc_ctx = NULL;
+void *tall_mgw_ctx = NULL;
 
 static void print_help()
 {
@@ -89,18 +103,21 @@ static void print_help()
 	printf(" -s --disable-color\n");
 	printf(" -D --daemonize Fork the process into a background daemon\n");
 	printf(" -V --version Print the version number\n");
+	printf(" --vty-ref-xml Generate the VTY reference XML output and exit.\n");
 }
 
 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'},
 			{"config-file", 1, 0, 'c'},
 			{"daemonize", 0, 0, 'D'},
 			{"version", 0, 0, 'V'},
 			{"disable-color", 0, 0, 's'},
+			{"vty-ref-xml", 0, &long_option, 1},
 			{0, 0, 0, 0},
 		};
 
@@ -114,8 +131,17 @@ static void handle_options(int argc, char **argv)
 			print_help();
 			exit(0);
 			break;
+		case 0:
+			switch (long_option) {
+			case 1:
+				vty_dump_xml_ref(stdout);
+				exit(0);
+			default:
+				fprintf(stderr, "error parsing cmdline options\n");
+				exit(2);
+			}
 		case 'c':
-			config_file = talloc_strdup(tall_bsc_ctx, optarg);
+			config_file = talloc_strdup(tall_mgw_ctx, optarg);
 			break;
 		case 's':
 			log_set_use_color(osmo_stderr_target, 0);
@@ -140,20 +166,20 @@ static void handle_options(int argc, char **argv)
 
 /* Callback function to be called when the RSIP ("Reset in Progress") mgcp
  * command is received */
-static int mgcp_rsip_cb(struct mgcp_trunk_config *tcfg)
+static int mgcp_rsip_cb(struct mgcp_trunk *trunk)
 {
 	/* Set flag so that, when read_call_agent() is called next time
 	 * the reset can progress */
 	reset_endpoints = 1;
 
-	reset_trunk = tcfg;
+	reset_trunk = trunk;
 
 	return 0;
 }
 
 static int read_call_agent(struct osmo_fd *fd, unsigned int what)
 {
-	struct sockaddr_in addr;
+	struct osmo_sockaddr addr;
 	socklen_t slen = sizeof(addr);
 	struct msgb *msg;
 	struct msgb *resp;
@@ -179,7 +205,7 @@ static int read_call_agent(struct osmo_fd *fd, unsigned int what)
 	msgb_reset(msg);
 
 	if (resp) {
-		sendto(cfg->gw_fd.bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr));
+		sendto(cfg->gw_fd.bfd.fd, resp->l2h, msgb_l2len(resp), 0, &addr.u.sa, sizeof(addr));
 		msgb_free(resp);
 	}
 
@@ -195,7 +221,7 @@ static int read_call_agent(struct osmo_fd *fd, unsigned int what)
 		/* Walk over all endpoints and trigger a release, this will release all
 		 * endpoints, possible open connections are forcefully dropped */
 		for (i = 1; i < reset_trunk->number_endpoints; ++i)
-			mgcp_endp_release(&reset_trunk->endpoints[i]);
+			mgcp_endp_release(reset_trunk->endpoints[i]);
 	}
 
 	return 0;
@@ -247,7 +273,13 @@ static const struct log_info_cat log_categories[] = {
 		  .description = "RTP stream handling",
 		  .color = "\033[1;30m",
 		  .enabled = 1,.loglevel = LOGL_NOTICE,
-		  },
+	},
+	[DE1] = {
+		  .name = "DE1",
+		  .description = "E1 line handling",
+		  .color = "\033[1;31m",
+		  .enabled = 1,.loglevel = LOGL_NOTICE,
+	},
 };
 
 const struct log_info log_info = {
@@ -260,40 +292,54 @@ int main(int argc, char **argv)
 	unsigned int flags;
 	int rc;
 
-	tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent");
-	vty_info.tall_ctx = tall_bsc_ctx;
+	tall_mgw_ctx = talloc_named_const(NULL, 1, "mgcp-callagent");
+	vty_info.tall_ctx = tall_mgw_ctx;
 
-	msgb_talloc_ctx_init(tall_bsc_ctx, 0);
+	msgb_talloc_ctx_init(tall_mgw_ctx, 0);
 
 	osmo_init_ignore_signals();
-	osmo_init_logging2(tall_bsc_ctx, &log_info);
+	osmo_init_logging2(tall_mgw_ctx, &log_info);
+	libosmo_abis_init(tall_mgw_ctx);
 
 	cfg = mgcp_config_alloc();
 	if (!cfg)
 		return -1;
 
 	vty_info.copyright = osmomgw_copyright;
+	vty_info.usr_attr_desc[MGW_CMD_ATTR_NEWCONN] = \
+		"This command applies when a new connection is created";
+	vty_info.usr_attr_letters[MGW_CMD_ATTR_NEWCONN] = 'n';
+
 	vty_init(&vty_info);
 	logging_vty_add_cmds();
 	osmo_talloc_vty_add_cmds();
 	osmo_stats_vty_add_cmds();
 	mgcp_vty_init();
+	ctrl_vty_init(cfg);
+	e1inp_vty_init();
+	osmo_cpu_sched_vty_init(tall_mgw_ctx);
 
 	handle_options(argc, argv);
 
-	rate_ctr_init(tall_bsc_ctx);
-	osmo_stats_init(tall_bsc_ctx);
+	rate_ctr_init(tall_mgw_ctx);
+	osmo_stats_init(tall_mgw_ctx);
 
 	rc = mgcp_parse_config(config_file, cfg, MGCP_BSC);
 	if (rc < 0)
 		return rc;
 
 	/* start telnet after reading config for vty_get_bind_addr() */
-	rc = telnet_init_dynif(tall_bsc_ctx, NULL,
+	rc = telnet_init_dynif(tall_mgw_ctx, NULL,
 			       vty_get_bind_addr(), OSMO_VTY_PORT_MGW);
 	if (rc < 0)
 		return rc;
 
+	cfg->ctrl = mgw_ctrl_interface_setup(cfg, ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_MGW);
+	if (!cfg->ctrl) {
+		fprintf(stderr, "Failed to init the control interface on %s:%u. Exiting\n",
+			ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_MGW);
+	}
+
 	/* Set the reset callback function. This functions is called when the
 	 * mgcp-command "RSIP" (Reset in Progress) is received */
 	cfg->reset_cb = mgcp_rsip_cb;
@@ -303,7 +349,7 @@ int main(int argc, char **argv)
 	if (cfg->call_agent_addr)
 		flags |= OSMO_SOCK_F_CONNECT;
 
-	rc = osmo_sock_init2_ofd(&cfg->gw_fd.bfd, AF_INET, SOCK_DGRAM, IPPROTO_UDP,
+	rc = osmo_sock_init2_ofd(&cfg->gw_fd.bfd, AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP,
 				cfg->source_addr, cfg->source_port,
 				cfg->call_agent_addr, cfg->call_agent_addr ? 2727 : 0, flags);
 	if (rc < 0) {

tests/mgcp/Makefile.am

@@ -11,6 +11,8 @@ AM_CFLAGS = \
 	$(LIBOSMOVTY_CFLAGS) \
 	$(LIBOSMOGSM_CFLAGS) \
 	$(LIBOSMONETIF_CFLAGS) \
+	$(LIBOSMOABIS_CFLAGS) \
+	$(LIBOSMOTRAU_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
 	$(NULL)
 
@@ -35,7 +37,10 @@ mgcp_test_LDADD = \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBOSMOGSM_LIBS) \
+	$(LIBOSMOABIS_LIBS) \
+	$(LIBOSMOTRAU_LIBS) \
 	$(LIBRARY_DL) \
+	$(LIBRARY_DLSYM) \
 	$(LIBOSMONETIF_LIBS) \
 	-lm  \
 	$(NULL)

tests/mgcp/mgcp_test.c

@@ -22,16 +22,19 @@
 #include <osmocom/mgcp/mgcp.h>
 #include <osmocom/mgcp/vty.h>
 #include <osmocom/mgcp/mgcp_common.h>
-#include <osmocom/mgcp/mgcp_internal.h>
+#include <osmocom/mgcp/mgcp_conn.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
 #include <osmocom/mgcp/mgcp_stat.h>
 #include <osmocom/mgcp/mgcp_msg.h>
 #include <osmocom/mgcp/mgcp_endp.h>
+#include <osmocom/mgcp/mgcp_trunk.h>
 #include <osmocom/mgcp/mgcp_sdp.h>
 #include <osmocom/mgcp/mgcp_codec.h>
 
 #include <osmocom/core/application.h>
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/utils.h>
+#include <osmocom/core/socket.h>
 #include <string.h>
 #include <limits.h>
 #include <dlfcn.h>
@@ -70,7 +73,7 @@ static void test_strline(void)
 }
 
 #define AUEP1	"AUEP 158663169 ds/e1-1/2@mgw MGCP 1.0\r\n"
-#define AUEP1_RET "200 158663169 OK\r\n"
+#define AUEP1_RET "500 158663169 FAIL\r\n"
 #define AUEP2	"AUEP 18983213 ds/e1-2/1@mgw MGCP 1.0\r\n"
 #define AUEP2_RET "500 18983213 FAIL\r\n"
 #define EMPTY	"\r\n"
@@ -81,7 +84,7 @@ static void test_strline(void)
 #define MDCX_WRONG_EP "MDCX 18983213 ds/e1-3/1@mgw MGCP 1.0\r\n"
 #define MDCX_ERR_RET "500 18983213 FAIL\r\n"
 #define MDCX_UNALLOCATED "MDCX 18983214 ds/e1-1/2@mgw MGCP 1.0\r\n"
-#define MDCX_RET "400 18983214 FAIL\r\n"
+#define MDCX_RET "500 18983214 FAIL\r\n"
 
 #define MDCX3 \
 	"MDCX 18983215 1@mgw MGCP 1.0\r\n" \
@@ -591,14 +594,25 @@ static struct msgb *create_msg(const char *str, const char *conn_id)
 	return msg;
 }
 
-static int last_endpoint = -1;
+static char last_endpoint[MGCP_ENDPOINT_MAXLEN];
 
-static int mgcp_test_policy_cb(struct mgcp_trunk_config *cfg, int endpoint,
-			       int state, const char *transactio_id)
+static int mgcp_test_policy_cb(struct mgcp_endpoint *endp,
+			       int state, const char *transaction_id)
 {
-	fprintf(stderr, "Policy CB got state %d on endpoint 0x%x\n",
-		state, endpoint);
-	last_endpoint = endpoint;
+	unsigned int i;
+	struct mgcp_trunk *trunk;
+
+	fprintf(stderr, "Policy CB got state %d on endpoint %s\n",
+		state, endp->name);
+
+	trunk = endp->trunk;
+	last_endpoint[0] = '\0';
+	for (i = 0; i < trunk->number_endpoints; i++) {
+		if (strcmp(endp->name, trunk->endpoints[i]->name) == 0)
+			osmo_strlcpy(last_endpoint, trunk->endpoints[i]->name,
+				     sizeof(last_endpoint));
+	}
+
 	return MGCP_POLICY_CONT;
 }
 
@@ -641,11 +655,11 @@ int clock_gettime(clockid_t clk_id, struct timespec *tp)
 	return real_clock_gettime(clk_id, tp);
 }
 
-static void mgcp_endpoints_release(struct mgcp_trunk_config *trunk)
+static void mgcp_endpoints_release(struct mgcp_trunk *trunk)
 {
 	int i;
-	for (i = 1; i < trunk->number_endpoints; i++)
-		mgcp_endp_release(&trunk->endpoints[i]);
+	for (i = 0; i < trunk->number_endpoints; i++)
+		mgcp_endp_release(trunk->endpoints[i]);
 }
 
 #define CONN_UNMODIFIED (0x1000)
@@ -749,23 +763,21 @@ static void test_messages(void)
 {
 	struct mgcp_config *cfg;
 	struct mgcp_endpoint *endp;
-	struct mgcp_trunk_config *trunk2;
+	struct mgcp_trunk *trunk;
 	int i;
 	struct mgcp_conn_rtp *conn = NULL;
 	char last_conn_id[256];
 	int rc;
 
 	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 
-	cfg->trunk.vty_number_endpoints = 64;
-	mgcp_endpoints_allocate(&cfg->trunk);
+	trunk->v.vty_number_endpoints = 64;
+        mgcp_trunk_equip(trunk);
 	cfg->policy_cb = mgcp_test_policy_cb;
 
 	memset(last_conn_id, 0, sizeof(last_conn_id));
 
-	trunk2 = mgcp_trunk_alloc(cfg, 1);
-	mgcp_endpoints_allocate(trunk2);
-
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		const struct mgcp_test *t = &tests[i];
 		struct msgb *inp;
@@ -774,10 +786,10 @@ static void test_messages(void)
 		printf("\n================================================\n");
 		printf("Testing %s\n", t->name);
 
-		last_endpoint = -1;
+		last_endpoint[0] = '\0';
 		dummy_packets = 0;
 
-		osmo_talloc_replace_string(cfg, &cfg->trunk.audio_fmtp_extra,
+		osmo_talloc_replace_string(cfg, &trunk->audio_fmtp_extra,
 					   t->extra_fmtp);
 
 		inp = create_msg(t->req, last_conn_id);
@@ -809,8 +821,9 @@ static void test_messages(void)
 		if (dummy_packets)
 			printf("Dummy packets: %d\n", dummy_packets);
 
-		if (last_endpoint != -1) {
-			endp = &cfg->trunk.endpoints[last_endpoint];
+		if (last_endpoint[0] != '\0') {
+			endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+			OSMO_ASSERT(endp);
 
 			conn = mgcp_conn_get_rtp(endp, "1");
 			if (conn) {
@@ -865,10 +878,9 @@ static void test_messages(void)
 
 		/* Check detected payload type */
 		if (conn && t->ptype != PTYPE_IGNORE) {
-			OSMO_ASSERT(last_endpoint != -1);
-			endp = &cfg->trunk.endpoints[last_endpoint];
+			OSMO_ASSERT(last_endpoint[0] != '\0');
 
-			fprintf(stderr, "endpoint 0x%x: "
+			fprintf(stderr, "endpoint:%s: "
 				"payload type %d (expected %d)\n",
 				last_endpoint,
 				conn->end.codec->payload_type, t->ptype);
@@ -882,29 +894,26 @@ static void test_messages(void)
 		}
 	}
 
-	mgcp_endpoints_release(trunk2);
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
 static void test_retransmission(void)
 {
 	struct mgcp_config *cfg;
-	struct mgcp_trunk_config *trunk2;
+	struct mgcp_trunk *trunk;
 	int i;
 	char last_conn_id[256];
 	int rc;
 
 	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 
-	cfg->trunk.vty_number_endpoints = 64;
-	mgcp_endpoints_allocate(&cfg->trunk);
+	trunk->v.vty_number_endpoints = 64;
+        mgcp_trunk_equip(trunk);
 
 	memset(last_conn_id, 0, sizeof(last_conn_id));
 
-	trunk2 = mgcp_trunk_alloc(cfg, 1);
-	mgcp_endpoints_allocate(trunk2);
-
 	for (i = 0; i < ARRAY_SIZE(retransmit); i++) {
 		const struct mgcp_test *t = &retransmit[i];
 		struct msgb *inp;
@@ -943,8 +952,7 @@ static void test_retransmission(void)
 		msgb_free(msg);
 	}
 
-	mgcp_endpoints_release(trunk2);
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
@@ -958,18 +966,16 @@ static int rqnt_cb(struct mgcp_endpoint *endp, char _tone)
 static void test_rqnt_cb(void)
 {
 	struct mgcp_config *cfg;
-	struct mgcp_trunk_config *trunk2;
+	struct mgcp_trunk *trunk;
 	struct msgb *inp, *msg;
 	char conn_id[256];
 
 	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 	cfg->rqnt_cb = rqnt_cb;
 
-	cfg->trunk.vty_number_endpoints = 64;
-	mgcp_endpoints_allocate(&cfg->trunk);
-
-	trunk2 = mgcp_trunk_alloc(cfg, 1);
-	mgcp_endpoints_allocate(trunk2);
+	trunk->v.vty_number_endpoints = 64;
+        mgcp_trunk_equip(trunk);
 
 	inp = create_msg(CRCX, NULL);
 	msg = mgcp_handle_message(cfg, inp);
@@ -998,8 +1004,7 @@ static void test_rqnt_cb(void)
 	inp = create_msg(DLCX, conn_id);
 	msgb_free(mgcp_handle_message(cfg, inp));
 	msgb_free(inp);
-	mgcp_endpoints_release(trunk2);
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
@@ -1035,8 +1040,9 @@ static void test_packet_loss_calc(void)
 {
 	int i;
 	struct mgcp_endpoint endp;
+	struct mgcp_endpoint *endpoints[1];
 	struct mgcp_config cfg = {0};
-	struct mgcp_trunk_config trunk;
+	struct mgcp_trunk trunk;
 
 	printf("Testing packet loss calculation.\n");
 
@@ -1045,9 +1051,10 @@ static void test_packet_loss_calc(void)
 
 	endp.cfg = &cfg;
 	endp.type = &ep_typeset.rtp;
-	trunk.vty_number_endpoints = 1;
-	trunk.endpoints = &endp;
-	endp.tcfg = &trunk;
+	trunk.v.vty_number_endpoints = 1;
+	trunk.endpoints = endpoints;
+	trunk.endpoints[0] = &endp;
+	endp.trunk = &trunk;
 	INIT_LLIST_HEAD(&endp.conns);
 
 	for (i = 0; i < ARRAY_SIZE(pl_test_dat); ++i) {
@@ -1256,19 +1263,19 @@ struct rtp_packet_info test_rtp_packets1[] = {
 void mgcp_patch_and_count(struct mgcp_endpoint *endp,
 			  struct mgcp_rtp_state *state,
 			  struct mgcp_rtp_end *rtp_end,
-			  struct sockaddr_in *addr, char *data, int len);
+			  struct osmo_sockaddr *addr, struct msgb *msg);
 
 static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 {
 	int i;
 
-	struct mgcp_trunk_config trunk;
+	struct mgcp_trunk trunk;
 	struct mgcp_endpoint endp;
+	struct mgcp_endpoint *endpoints[1];
 	struct mgcp_config cfg = {0};
 	struct mgcp_rtp_state state;
 	struct mgcp_rtp_end *rtp;
-	struct sockaddr_in addr = { 0 };
-	char buffer[4096];
+	struct osmo_sockaddr addr = { 0 };
 	uint32_t last_ssrc = 0;
 	uint32_t last_timestamp = 0;
 	uint32_t last_seqno = 0;
@@ -1295,12 +1302,13 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 	endp.cfg = &cfg;
 	endp.type = &ep_typeset.rtp;
 
-	trunk.vty_number_endpoints = 1;
-	trunk.endpoints = &endp;
+	trunk.v.vty_number_endpoints = 1;
+	trunk.endpoints = endpoints;
+	trunk.endpoints[0] = &endp;
 	trunk.force_constant_ssrc = patch_ssrc;
 	trunk.force_aligned_timing = patch_ts;
 
-	endp.tcfg = &trunk;
+	endp.trunk = &trunk;
 
 	INIT_LLIST_HEAD(&endp.conns);
 	_conn = mgcp_conn_alloc(NULL, &endp, MGCP_CONN_TYPE_RTP,
@@ -1316,16 +1324,17 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 
 	for (i = 0; i < ARRAY_SIZE(test_rtp_packets1); ++i) {
 		struct rtp_packet_info *info = test_rtp_packets1 + i;
+		struct msgb *msg = msgb_alloc(4096, __func__);
 
 		force_monotonic_time_us = round(1000000.0 * info->txtime);
 
-		OSMO_ASSERT(info->len <= sizeof(buffer));
+		OSMO_ASSERT(info->len <= msgb_tailroom(msg));
 		OSMO_ASSERT(info->len >= 0);
-		memmove(buffer, info->data, info->len);
+		msg->l3h = msgb_put(msg, info->len);
+		memcpy((char*)msgb_l3(msg), info->data, info->len);
 		mgcp_rtp_end_config(&endp, 1, rtp);
 
-		mgcp_patch_and_count(&endp, &state, rtp, &addr,
-				     buffer, info->len);
+		mgcp_patch_and_count(&endp, &state, rtp, &addr, msg);
 
 		if (state.out_stream.ssrc != last_ssrc) {
 			printf("Output SSRC changed to %08x\n",
@@ -1352,6 +1361,8 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 		last_out_ts_err_cnt = state.out_stream.err_ts_ctr->current;
 		last_timestamp = state.out_stream.last_timestamp;
 		last_seqno = state.out_stream.last_seq;
+
+		msgb_free(msg);
 	}
 
 	force_monotonic_time_us = -1;
@@ -1361,7 +1372,7 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 static void test_multilple_codec(void)
 {
 	struct mgcp_config *cfg;
-	struct mgcp_trunk_config *trunk2;
+	struct mgcp_trunk *trunk;
 	struct mgcp_endpoint *endp;
 	struct msgb *inp, *resp;
 	struct in_addr addr;
@@ -1371,15 +1382,13 @@ static void test_multilple_codec(void)
 	printf("Testing multiple payload types\n");
 
 	cfg = mgcp_config_alloc();
-	cfg->trunk.vty_number_endpoints = 64;
-	mgcp_endpoints_allocate(&cfg->trunk);
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
+	trunk->v.vty_number_endpoints = 64;
+        mgcp_trunk_equip(trunk);
 	cfg->policy_cb = mgcp_test_policy_cb;
 
-	trunk2 = mgcp_trunk_alloc(cfg, 1);
-	mgcp_endpoints_allocate(trunk2);
-
 	/* Allocate endpoint 1@mgw with two codecs */
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_1, NULL);
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
@@ -1387,14 +1396,15 @@ static void test_multilple_codec(void)
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 1);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/1@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 18);
 
 	/* Allocate 2@mgw with three codecs, last one ignored */
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_2, NULL);
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
@@ -1402,8 +1412,9 @@ static void test_multilple_codec(void)
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 2);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/2@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 18);
@@ -1414,7 +1425,7 @@ static void test_multilple_codec(void)
 	 * it makes and since we already decided in OS#2658 that a missing
 	 * LCO should pick a sane default codec, it makes sense to expect
 	 * the same behaviour if SDP lacks proper payload type information */
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_3, NULL);
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
@@ -1422,14 +1433,15 @@ static void test_multilple_codec(void)
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 3);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/3@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 0);
 
 	/* Allocate 4@mgw with a single codec */
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_4, NULL);
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
@@ -1437,44 +1449,46 @@ static void test_multilple_codec(void)
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 4);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/4@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 18);
 
-	/* Allocate 5@mgw at select GSM.. */
-	last_endpoint = -1;
+	/* Allocate 5@mgw and let osmo-mgw pick a codec from the list */
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_GSM_EXACT, NULL);
-	talloc_free(cfg->trunk.audio_name);
-	cfg->trunk.audio_name = "GSM/8000";
-	cfg->trunk.no_audio_transcoding = 1;
+	trunk->no_audio_transcoding = 1;
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
 					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 5);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/5@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
-	OSMO_ASSERT(conn->end.codec->payload_type == 3);
+	OSMO_ASSERT(conn->end.codec->payload_type == 0);
 
 	inp = create_msg(MDCX_NAT_DUMMY, conn_id);
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	resp = mgcp_handle_message(cfg, inp);
 	msgb_free(inp);
 	msgb_free(resp);
-	OSMO_ASSERT(last_endpoint == 5);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/5@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 3);
 	OSMO_ASSERT(conn->end.rtp_port == htons(16434));
 	memset(&addr, 0, sizeof(addr));
 	inet_aton("8.8.8.8", &addr);
-	OSMO_ASSERT(conn->end.addr.s_addr == addr.s_addr);
+	OSMO_ASSERT(conn->end.addr.u.sa.sa_family == AF_INET);
+	OSMO_ASSERT(conn->end.addr.u.sin.sin_addr.s_addr == addr.s_addr);
 
 	/* Check what happens without that flag */
 
@@ -1487,23 +1501,23 @@ static void test_multilple_codec(void)
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(!conn);
 
-	last_endpoint = -1;
+	last_endpoint[0] = '\0';
 	inp = create_msg(CRCX_MULT_GSM_EXACT, NULL);
-	cfg->trunk.no_audio_transcoding = 0;
+	trunk->no_audio_transcoding = 0;
 	resp = mgcp_handle_message(cfg, inp);
 	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
 					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
-	OSMO_ASSERT(last_endpoint == 5);
-	endp = &cfg->trunk.endpoints[last_endpoint];
+	OSMO_ASSERT(strcmp(last_endpoint,"rtpbridge/5@mgw") == 0);
+	endp = mgcp_endp_by_name(NULL, last_endpoint, cfg);
+	OSMO_ASSERT(endp);
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec->payload_type == 0);
 
-	mgcp_endpoints_release(trunk2);
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
@@ -1513,14 +1527,17 @@ static void test_no_cycle(void)
 	struct mgcp_endpoint *endp;
 	struct mgcp_conn_rtp *conn = NULL;
 	struct mgcp_conn *_conn = NULL;
+	struct mgcp_trunk *trunk;
 
 	printf("Testing no sequence flow on initial packet\n");
 
 	cfg = mgcp_config_alloc();
-	cfg->trunk.vty_number_endpoints = 64;
-	mgcp_endpoints_allocate(&cfg->trunk);
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
+	trunk->v.vty_number_endpoints = 64;
+        mgcp_trunk_equip(trunk);
 
-	endp = &cfg->trunk.endpoints[1];
+	endp = mgcp_endp_by_name(NULL, "rtpbridge/1@mgw", cfg);
+	OSMO_ASSERT(endp);
 
 	_conn = mgcp_conn_alloc(NULL, endp, MGCP_CONN_TYPE_RTP,
 				"test-connection");
@@ -1552,28 +1569,26 @@ static void test_no_cycle(void)
 	OSMO_ASSERT(conn->state.stats.cycles == UINT16_MAX + 1);
 	OSMO_ASSERT(conn->state.stats.max_seq == 0);
 
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
 static void test_no_name(void)
 {
-	struct mgcp_trunk_config *trunk2;
+	struct mgcp_trunk *trunk;
 	struct mgcp_config *cfg;
 	struct msgb *inp, *msg;
 
 	printf("Testing no rtpmap name\n");
 	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_by_num(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 
-	cfg->trunk.vty_number_endpoints = 64;
-	cfg->trunk.audio_send_name = 0;
-	mgcp_endpoints_allocate(&cfg->trunk);
+	trunk->v.vty_number_endpoints = 64;
+	trunk->audio_send_name = 0;
+        mgcp_trunk_equip(trunk);
 
 	cfg->policy_cb = mgcp_test_policy_cb;
 
-	trunk2 = mgcp_trunk_alloc(cfg, 1);
-	mgcp_endpoints_allocate(trunk2);
-
 	inp = create_msg(CRCX, NULL);
 	msg = mgcp_handle_message(cfg, inp);
 
@@ -1585,8 +1600,7 @@ static void test_no_name(void)
 	msgb_free(inp);
 	msgb_free(msg);
 
-	mgcp_endpoints_release(trunk2);
-	mgcp_endpoints_release(&cfg->trunk);
+	mgcp_endpoints_release(trunk);
 	talloc_free(cfg);
 }
 
@@ -2105,6 +2119,48 @@ void test_conn_id_matching()
 	talloc_free(conn);
 }
 
+void test_e1_trunk_nr_from_epname()
+{
+	int trunk_nr;
+
+	/* Note: e1_trunk_nr_from_epname does not check the text
+	 * after the E1 trunk number, after the delimiter
+	 * character "/" arbitrary text may follow. */
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-0/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == 0);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-1/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == 1);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-2/s-2/su16-0");
+	OSMO_ASSERT(trunk_nr == 2);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-3/s-23/su32-0");
+	OSMO_ASSERT(trunk_nr == 3);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-3/xxxxxxx");
+	OSMO_ASSERT(trunk_nr == 3);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-24/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == 24);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-64/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == 64);
+
+	/* The following endpoint strings should fail, either the
+	 * trunk number exceeds the valid range or the trunk prefix
+	 * is wrong. Also when the delimiter character "/" at the
+	 * end of the trunk is wrong the parsing should fail. */
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-65/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1--1/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+	trunk_nr = e1_trunk_nr_from_epname("xxxxxx4zyz");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1+2/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e2-24/s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+	trunk_nr = e1_trunk_nr_from_epname("ds/e1-24s-1/su16-0");
+	OSMO_ASSERT(trunk_nr == -EINVAL);
+
+	return;
+}
+
 int main(int argc, char **argv)
 {
 	void *ctx = talloc_named_const(NULL, 0, "mgcp_test");
@@ -2130,6 +2186,7 @@ int main(int argc, char **argv)
 	test_check_local_cx_options(ctx);
 	test_mgcp_codec_pt_translate();
 	test_conn_id_matching();
+	test_e1_trunk_nr_from_epname();
 
 	OSMO_ASSERT(talloc_total_size(msgb_ctx) == 0);
 	OSMO_ASSERT(talloc_total_blocks(msgb_ctx) == 1);

tests/mgcp_client/Makefile.am

@@ -35,6 +35,7 @@ mgcp_client_test_LDADD = \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBRARY_DL) \
+	$(LIBRARY_DLSYM) \
 	$(LIBOSMONETIF_LIBS) \
 	$(NULL)
 

tests/mgcp_client/mgcp_client_test.c

@@ -294,11 +294,23 @@ void test_mgcp_msg(void)
 	     MGCP_MSG_PRESENCE_CONN_ID | MGCP_MSG_PRESENCE_CONN_MODE |
 	     MGCP_MSG_PRESENCE_AUDIO_IP | MGCP_MSG_PRESENCE_AUDIO_PORT);
 	memset(audio_ip_overflow, 'X', sizeof(audio_ip_overflow));
+	audio_ip_overflow[1] = '.';
 	audio_ip_overflow[sizeof(audio_ip_overflow) - 1] = '\0';
 	mgcp_msg.audio_ip = audio_ip_overflow;
 	msg = mgcp_msg_gen(mgcp, &mgcp_msg);
 	OSMO_ASSERT(msg == NULL);
 
+	printf("IPv6 test:\n");
+	mgcp_msg.verb = MGCP_VERB_MDCX;
+	mgcp_msg.presence =
+	    (MGCP_MSG_PRESENCE_ENDPOINT | MGCP_MSG_PRESENCE_CALL_ID |
+	     MGCP_MSG_PRESENCE_CONN_ID | MGCP_MSG_PRESENCE_CONN_MODE |
+	     MGCP_MSG_PRESENCE_AUDIO_IP | MGCP_MSG_PRESENCE_AUDIO_PORT);
+	mgcp_msg.audio_ip = "2001:db8:1::ab9:c0a8:102";
+	mgcp->actual.remote_addr = "::1";
+	msg = mgcp_msg_gen(mgcp, &mgcp_msg);
+	printf("%s\n", (char *)msg->data);
+
 	printf("\n");
 	msgb_free(msg);
 }
@@ -413,6 +425,66 @@ static struct sdp_section_start_test sdp_section_start_tests[] = {
 			"m=audio 23\r\n",
 		.expect_rc = 0,
 	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 1.2.3.4\r\n",
+		.expect_params = {
+			.audio_ip = "1.2.3.4",
+		},
+		.expect_rc = 0,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP6 2001:db8:1::ab9:c0a8:102\r\n",
+		.expect_params = {
+			.audio_ip = "2001:db8:1::ab9:c0a8:102",
+		},
+		.expect_rc = 0,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP6 1.2.3.4\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 ::1\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 notanip\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 1.2.3.4.5.6\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 1.2 .3\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 1.2 .3\r\n",
+		.expect_rc = -22,
+	},
+	{
+		.body = "some mgcp header data\r\nand header params"
+			"\r\n\r\n"
+			"c=IN IP4 \r\n",
+		.expect_rc = -22,
+	},
 };
 
 void test_sdp_section_start()
@@ -443,7 +515,12 @@ void test_sdp_section_start()
 			continue;
 		}
 
-		fprintf(stderr, "got audio_port=%u\n", t->expect_params.audio_port);
+		fprintf(stderr, "got audio_ip=\"%s\"\n", r->audio_ip);
+		if (strcmp(r->audio_ip, t->expect_params.audio_ip)) {
+			fprintf(stderr, "FAIL: Expected audio_ip=\"%s\"\n", t->expect_params.audio_ip);
+			failures++;
+		}
+		fprintf(stderr, "got audio_port=%u\n", r->audio_port);
 		if (r->audio_port != t->expect_params.audio_port) {
 			fprintf(stderr, "FAIL: Expected audio_port=%u\n", t->expect_params.audio_port);
 			failures++;
@@ -547,6 +624,57 @@ static void test_map_codec_to_pt_and_map_pt_to_codec(void)
 	printf("\n");
 }
 
+void test_mgcp_client_e1_epname(void)
+{
+	char *epname;
+
+	if (mgcp)
+		talloc_free(mgcp);
+	mgcp = mgcp_client_init(ctx, &conf);
+
+	/* Valid endpoint names */
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 1, 15, 64, 0);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 2, 14, 32, 0);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 3, 13, 32, 4);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 4, 12, 16, 0);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 5, 11, 16, 2);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 6, 10, 16, 4);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 7, 9, 16, 6);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 8, 8, 8, 0);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 9, 7, 8, 1);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 10, 6, 8, 2);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 11, 5, 8, 3);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 12, 4, 8, 4);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 13, 3, 8, 5);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 14, 2, 8, 6);
+	printf("%s\n", epname);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 15, 1, 8, 7);
+	printf("%s\n", epname);
+
+	/* A few invalid enpoint names */
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 15, 1, 128, 0);
+	OSMO_ASSERT(epname == NULL);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 15, 1, 8, 16);
+	OSMO_ASSERT(epname == NULL);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 15, 0, 8, 2);
+	OSMO_ASSERT(epname == NULL);
+	epname = (char *)mgcp_client_e1_epname(ctx, mgcp, 15, 64, 8, 2);
+	OSMO_ASSERT(epname == NULL);
+}
+
 static const struct log_info_cat log_categories[] = {
 };
 
@@ -575,6 +703,7 @@ int main(int argc, char **argv)
 	test_sdp_section_start();
 	test_map_codec_to_pt_and_map_pt_to_codec();
 	test_map_pt_to_codec();
+	test_mgcp_client_e1_epname();
 
 	printf("Done\n");
 	fprintf(stderr, "Done\n");

tests/mgcp_client/mgcp_client_test.err

@@ -19,57 +19,119 @@ test_sdp_section_start() test [0]:
 body: ""
 DLMGCP MGCP response contains no SDP parameters
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [1]:
 body: "\n\n"
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [2]:
 body: "\r\n\r\n"
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [3]:
 body: "\n\r\n\r"
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [4]:
 body: "some mgcp header data\r\nand header params\n\nm=audio 23\r\n"
 got rc=0
+got audio_ip=""
 got audio_port=23
 
 test_sdp_section_start() test [5]:
 body: "some mgcp header data\r\nand header params\r\n\r\nm=audio 23\r\n"
 got rc=0
+got audio_ip=""
 got audio_port=23
 
 test_sdp_section_start() test [6]:
 body: "some mgcp header data\r\nand header params\n\r\n\rm=audio 23\r\n"
 got rc=0
+got audio_ip=""
 got audio_port=23
 
 test_sdp_section_start() test [7]:
 body: "some mgcp header data\r\nand header params\n\r\nm=audio 23\r\n"
 DLMGCP MGCP response contains no SDP parameters
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [8]:
 body: "some mgcp header data\r\nand header params\r\n\rm=audio 23\r\n"
 DLMGCP MGCP response contains no SDP parameters
 got rc=0
+got audio_ip=""
 got audio_port=0
 
 test_sdp_section_start() test [9]:
 body: "some mgcp header data\r\nand header params\n\r\rm=audio 23\r\n"
 DLMGCP MGCP response contains no SDP parameters
 got rc=0
+got audio_ip=""
 got audio_port=0
+
+test_sdp_section_start() test [10]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 1.2.3.4\r\n"
+got rc=0
+got audio_ip="1.2.3.4"
+got audio_port=0
+
+test_sdp_section_start() test [11]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP6 2001:db8:1::ab9:c0a8:102\r\n"
+got rc=0
+got audio_ip="2001:db8:1::ab9:c0a8:102"
+got audio_port=0
+
+test_sdp_section_start() test [12]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP6 1.2.3.4\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [13]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 ::1\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [14]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 notanip\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [15]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 1.2.3.4.5.6\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [16]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 1.2 .3\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [17]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 1.2 .3\r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
+
+test_sdp_section_start() test [18]:
+body: "some mgcp header data\r\nand header params\r\n\r\nc=IN IP4 \r\n"
+DLMGCP Failed to parse MGCP response header (audio ip)
+got rc=-22
 DLMGCP ptmap contains illegal mapping: codec=113 maps to pt=2
 DLMGCP ptmap contains illegal mapping: codec=0 maps to pt=100
 DLMGCP ptmap contains illegal mapping: codec=113 maps to pt=2
 DLMGCP ptmap contains illegal mapping: codec=0 maps to pt=100
+DLMGCP MGCP client: using endpoint domain '@mgw'
+DLMGCP Cannot compose MGCP e1-endpoint name (ds/e1-15/s-1/su128-0@mgw), rate(128)/offset(0) combination is invalid!
+DLMGCP Cannot compose MGCP e1-endpoint name (ds/e1-15/s-1/su8-16@mgw), rate(8)/offset(16) combination is invalid!
+DLMGCP Cannot compose MGCP e1-endpoint name (ds/e1-15/s-0/su8-2@mgw), E1-timeslot number (0) is invalid!
+DLMGCP Cannot compose MGCP e1-endpoint name (ds/e1-15/s-64/su8-2@mgw), E1-timeslot number (64) is invalid!
 Done

tests/mgcp_client/mgcp_client_test.ok

@@ -109,6 +109,20 @@ M: sendrecv
 X-Osmux: 2
 
 Overfolow test:
+IPv6 test:
+MDCX 19 23@mgw MGCP 1.0
+C: 2f
+I: 11
+M: sendrecv
+
+v=0
+o=- 2f 23 IN IP6 ::1
+s=-
+c=IN IP6 2001:db8:1::ab9:c0a8:102
+t=0 0
+m=audio 1234 RTP/AVP 3
+a=ptime:20
+
 
 
 test_mgcp_client_cancel():
@@ -149,6 +163,24 @@ test_sdp_section_start() test [7]:
 test_sdp_section_start() test [8]:
 
 test_sdp_section_start() test [9]:
+
+test_sdp_section_start() test [10]:
+
+test_sdp_section_start() test [11]:
+
+test_sdp_section_start() test [12]:
+
+test_sdp_section_start() test [13]:
+
+test_sdp_section_start() test [14]:
+
+test_sdp_section_start() test [15]:
+
+test_sdp_section_start() test [16]:
+
+test_sdp_section_start() test [17]:
+
+test_sdp_section_start() test [18]:
  110 => 96
  111 => 97
  112 => 98
@@ -178,4 +210,19 @@ test_sdp_section_start() test [9]:
  2 <= 2
  100 <= 100
 
+ds/e1-1/s-15/su64-0@mgw
+ds/e1-2/s-14/su32-0@mgw
+ds/e1-3/s-13/su32-4@mgw
+ds/e1-4/s-12/su16-0@mgw
+ds/e1-5/s-11/su16-2@mgw
+ds/e1-6/s-10/su16-4@mgw
+ds/e1-7/s-9/su16-6@mgw
+ds/e1-8/s-8/su8-0@mgw
+ds/e1-9/s-7/su8-1@mgw
+ds/e1-10/s-6/su8-2@mgw
+ds/e1-11/s-5/su8-3@mgw
+ds/e1-12/s-4/su8-4@mgw
+ds/e1-13/s-3/su8-5@mgw
+ds/e1-14/s-2/su8-6@mgw
+ds/e1-15/s-1/su8-7@mgw
 Done