Fix build with debian 13

oml.c:461:20: error: returning 'HANDLE' {aka 'void *'} from a function with return type 'uint32_t' {aka 'unsigned int'} makes integer from pointer without a cast [-Wint-conversion]

Change-Id: I0831e448692713c488c0590a86bdc99b37160f47

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: osmocom

.gitignore

@@ -55,6 +55,7 @@ src/osmo-bts-oc2g/misc/.dirstamp
 tests/atconfig
 tests/package.m4
 tests/amr/amr_test
+tests/csd/csd_test
 tests/agch/agch_test
 tests/paging/paging_test
 tests/cipher/cipher_test
@@ -93,6 +94,7 @@ debian/tmp/
 doc/manuals/*.html
 doc/manuals/*.svg
 doc/manuals/*.pdf
+doc/manuals/vty/*.pdf
 doc/manuals/*__*.png
 doc/manuals/*.check
 doc/manuals/generated/
@@ -104,3 +106,7 @@ doc/manuals/common
 doc/manuals/build
 
 contrib/osmo-bts.spec
+contrib/ber/rtp_ber
+contrib/ber/rtp_gen_map
+
+arm-poky-linux-gnueabi-libtool

Makefile.am

@@ -8,7 +8,6 @@ EXTRA_DIST = \
 	.version \
 	README.md \
 	contrib/dump_docs.py \
-	contrib/osmo-bts.spec.in \
 	debian \
 	git-version-gen \
 	$(NULL)

README.md

@@ -57,6 +57,13 @@ There also is an
 [Abis reference Manual](https://ftp.osmocom.org/docs/latest/osmobts-abis.pdf)
 describing the OsmoBTS specific A-bis dialect.
 
+Forum
+-----
+
+We welcome any osmo-bts related discussions in the
+[Cellular Network Infrastructure -> 2G RAN (GERAN)](https://discourse.osmocom.org/c/cni/geran)
+section of the osmocom discourse (web based Forum).
+
 Mailing List
 ------------
 
@@ -69,13 +76,20 @@ Please observe the [Osmocom Mailing List
 Rules](https://osmocom.org/projects/cellular-infrastructure/wiki/Mailing_List_Rules)
 when posting.
 
+Issue Tracker
+-------------
+
+We use the [issue tracker of the osmo-bts project on osmocom.org](https://osmocom.org/projects/osmobts/issues) for
+tracking the state of bug reports and feature requests.  Feel free to submit any issues you may find, or help
+us out by resolving existing issues.
+
 Contributing
 ------------
 
 Our coding standards are described at
 https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards
 
-We us a gerrit based patch submission/review process for managing
+We use a Gerrit based patch submission/review process for managing
 contributions.  Please see
 https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for
 more details

TODO-RELEASE

@@ -1,2 +1,9 @@
-# When cleaning up this file: bump API version(s) in the following files:
-# configure.ac, debian/control, and contrib/osmo-bts.spec.in.
+# When cleaning up this file: bump API version in corresponding Makefile.am and rename corresponding debian/lib*.install
+# according to https://osmocom.org/projects/cellular-infrastructure/wiki/Make_a_new_release
+# In short: https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html#Updating-version-info
+# LIBVERSION=c:r:a
+# If the library source code has changed at all since the last update, then increment revision: c:r + 1:a.
+# If any interfaces have been added, removed, or changed since the last update: c + 1:0:a.
+# If any interfaces have been added since the last public release: c:r:a + 1.
+# If any interfaces have been removed or changed since the last public release: c:r:0.
+#library	what			description / commit summary line

configure.ac

@@ -69,14 +69,15 @@ then
 fi
 
 dnl checks for libraries
-PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOCTRL, libosmoctrl >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOCODEC, libosmocodec >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOCODING, libosmocoding >= 1.7.0)
-PKG_CHECK_MODULES(LIBOSMOABIS, libosmoabis >= 1.3.0)
-PKG_CHECK_MODULES(LIBOSMOTRAU, libosmotrau >= 1.3.0)
+PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOCTRL, libosmoctrl >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOCODEC, libosmocodec >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOCODING, libosmocoding >= 1.11.0)
+PKG_CHECK_MODULES(LIBOSMOABIS, libosmoabis >= 2.0.0)
+PKG_CHECK_MODULES(LIBOSMOTRAU, libosmotrau >= 2.0.0)
+PKG_CHECK_MODULES(LIBOSMONETIF, libosmo-netif >= 1.6.0)
 
 AC_MSG_CHECKING([whether to enable support for sysmobts calibration tool])
 AC_ARG_ENABLE(sysmobts-calib,
@@ -444,10 +445,11 @@ AC_OUTPUT(
     tests/power/Makefile
     tests/meas/Makefile
     tests/amr/Makefile
+    tests/csd/Makefile
     doc/Makefile
     doc/examples/Makefile
     doc/manuals/Makefile
     contrib/Makefile
+    contrib/ber/Makefile
     contrib/systemd/Makefile
-    contrib/osmo-bts.spec
     Makefile)

contrib/Makefile.am

@@ -1 +1 @@
-SUBDIRS = systemd
+SUBDIRS = systemd ber

contrib/ber/Makefile.am

@@ -0,0 +1,28 @@
+AM_CPPFLAGS = \
+	$(all_includes) \
+	-I$(top_srcdir)/include \
+	-I$(top_builddir)/include \
+	-I$(builddir) \
+	$(NULL)
+
+AM_CFLAGS = \
+	-Wall \
+	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOTRAU_CFLAGS) \
+	$(LIBOSMOCODEC_CFLAGS) \
+	$(NULL)
+
+LDADD = \
+	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOTRAU_LIBS) \
+	$(LIBOSMOCODEC_LIBS) \
+	$(NULL)
+
+noinst_PROGRAMS = rtp_ber rtp_gen_map
+
+rtp_ber_SOURCES = rtp_ber.c codec_bit_class.h
+
+rtp_gen_map_SOURCES = rtp_gen_map.c
+
+update_codec_bit_class_h: rtp_gen_map
+	$(AM_V_GEN)./$< > $(top_srcdir)/contrib/ber/codec_bit_class.h

contrib/ber/README

@@ -0,0 +1,26 @@
+BER testing tool
+----------------
+
+* Check all configs (MSC/BSC/BTS) for proper codec support
+  - FR enabled
+  - EFR enabled
+  - AMR 12.2 enabled (and all other modes disabled !)
+  - Use `amr-payload octet-aligned` in BSC config
+
+* Check BTS config
+  - Disable jitter buffer : `bts N / rtp jitter-buffer 0`
+
+* Check BSC config
+  - Disable radio timeout : `network / bts n / radio-link-timeout infinite`
+
+* Start BER testing tool
+  - `./rtp_ber 4000`
+
+* On the MSC CLI, start a silent-call, then request GSM to test loop
+  - `subscriber imsi <XXX> silent-call start tch/f speech-amr`
+  - `subscriber imsi <XXX> ms-test close-loop b`
+
+  Don't forget to terminate the loop and terminate the silent call !
+
+  - `subscriber imsi <XXX> ms-test open-loop`
+  - `subscriber imsi <XXX> silent-call stop`

contrib/ber/codec_bit_class.h

@@ -0,0 +1,59 @@
+static const int gsm_fr_bitclass[] = {
+	-1, -1, -1, -1,  0,  0,  0,  0,  1,  2,  0,  0,  0,  1,  2,  2,
+	 0,  0,  1,  2,  2,  0,  0,  1,  2,  2,  0,  1,  1,  2,  0,  1,
+	 2,  2,  0,  1,  2,  1,  2,  2,  0,  0,  0,  0,  0,  0,  1,  1,
+	 1,  1,  1,  0,  0,  0,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,
+	 1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,
+	 2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,
+	 0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0,  0,  1,  1,
+	 2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,
+	 1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,
+	 1,  2,  1,  1,  2,  1,  1,  2,  0,  0,  0,  0,  0,  0,  1,  1,
+	 1,  1,  1,  0,  0,  0,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,
+	 1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,
+	 2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,
+	 0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0,  0,  1,  1,
+	 2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  1,  2,  1,  2,  2,
+	 1,  2,  2,  1,  2,  2,  1,  2,  2,  1,  2,  2,  1,  2,  2,  1,
+	 2,  2,  1,  2,  2,  1,  2,  2,
+};
+
+static const int gsm_efr_bitclass[] = {
+	 1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  0,
+	 0,  0,  0,  0,  1,  1,  1,  0,  1,  1,  1,  1,  1,  1,  1,  1,
+	 1,  1,  1,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	 1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+	 2,  2,  2,  2,  2,  2,  0,  1,  1,  1,  1,  0,  0,  0,  0,  0,
+	 1,  0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	 1,  1,  1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+	 2,  2,  2,  2,  2,  2,  2,  2,  0,  1,  1,  1,  1,  0,  0,  0,
+	 0,  0,  0,  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,  2,  2,  2,  2,
+	 2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  1,  1,  1,
+	 1,  1,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	 1,  1,  2,  2,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,
+	 2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  1,
+	 1,  1,  1,  1,  2,  2,  1,  2,
+};
+
+static const int gsm_amr_12_2_bitclass[] = {
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  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,
+};
+

contrib/ber/rtp_ber.c

@@ -0,0 +1,483 @@
+/* RTP based GSM BER testing for osmo-bts, implementing ideas described in
+ * https://osmocom.org/projects/osmobts/wiki/BER_Testing
+ *
+ * In short: The command transmits a PRBS sequence encapsulated in RTP frames, which are sent
+ * to the BTS, which transmits that data in the (unimpaired) downlink.  The mobile station
+ * receives the data and is instructed to loop it back in the (possibly impaired) uplink.
+ * The BTS receives that uplink, puts in in RTP frames which end up being received back by this
+ * very tool.  By correlating the received RTP with the PRBS sequence, this tool can compute
+ * the BER (Bit Error Rate) of the (possibly impaired) uplink.  Doing this with different
+ * RF channel model simulators in the uplink allows to establish BER at different levels and
+ * channel conditions. */
+
+/* (C) 2019 sysmocom - s.f.m.c. GmbH; Author: Sylvain Munaut
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocom/codec/codec.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/prbs.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/trau/osmo_ortp.h>
+
+#include <codec_bit_class.h>
+
+
+struct app_state {
+	struct osmo_rtp_socket *rs;
+
+	enum {
+		WAIT_CONN = 0,	/* Wait for incoming connection */
+		WAIT_LOOP,	/* Wait for a somewhat valid packet to start measuring */
+		RUNNING,	/* Main state */
+	} state;
+
+	int pt;
+
+	int     ref_len;
+	uint8_t ref_bytes[GSM_FR_BYTES];	/* FR is the largest possible one */
+	ubit_t  ref_bits[8*GSM_FR_BYTES];
+
+	struct osmo_timer_list rtp_timer;
+
+	uint16_t rx_last_seq;
+	uint32_t rx_last_ts;
+	uint32_t rx_idx;
+	uint32_t tx_idx;
+
+	const int *err_tbl;	/* Classification table */
+	int err_frames;		/* Number of accumulated frames */
+	int err_cnt[3];		/* Bit error counter */
+	int err_tot[3];		/* Total # bits in that class */
+};
+
+#define FLOW_REG_TX_MAX_ADVANCE		200
+#define FLOW_REG_TX_MIN_ADVANCE		 50
+
+
+const struct log_info log_info;
+
+
+static const uint8_t amr_size_by_ft[] = {
+	[0]	= 12,	/* 4.75 */
+	[1]	= 13,	/* 5.15 */
+	[2]	= 15,	/* 5.9 */
+	[3]	= 17,	/* 6.7 */
+	[4]	= 19,	/* 7.4 */
+	[5]	= 20,	/* 7.95 */
+	[6]	= 26,	/* 10.2 */
+	[7]	= 31,	/* 12.2 */
+	[8]	= 5,	/* SID */
+};
+
+static const char * const amr_rate_by_ft[] = {
+	[0]	= "4.75",
+	[1]	= "5.15",
+	[2]	= "5.9",
+	[3]	= "6.7",
+	[4]	= "7.4",
+	[5]	= "7.95",
+	[6]	= "10.2",
+	[7]	= "12.2",
+	[8]	= "SID",
+};
+
+
+static void
+_gsm_fr_gen_ref(struct app_state *as)
+{
+	struct osmo_prbs_state pn9;
+
+	/* Length */
+	as->ref_len = GSM_FR_BYTES;
+
+	/* Marker */
+	as->ref_bits[0] = 1;
+	as->ref_bits[1] = 1;
+	as->ref_bits[2] = 0;
+	as->ref_bits[3] = 1;
+
+	/* PN */
+	osmo_prbs_state_init(&pn9, &osmo_prbs9);
+	pn9.state = 31;
+	osmo_prbs_get_ubits(&as->ref_bits[4], 260, &pn9);
+
+	/* Convert to bytes */
+	osmo_ubit2pbit_ext(as->ref_bytes, 0, as->ref_bits, 0, 8*GSM_FR_BYTES, 0);
+
+	/* Init error classes */
+	as->err_tot[0] =  50;
+	as->err_tot[1] = 132;
+	as->err_tot[2] =  78;
+	as->err_tbl = gsm_fr_bitclass;
+}
+
+static void
+_gsm_efr_gen_ref(struct app_state *as)
+{
+	struct osmo_prbs_state pn9;
+
+	/* Length */
+	as->ref_len = GSM_EFR_BYTES;
+
+	/* Marker */
+	as->ref_bits[0] = 1;
+	as->ref_bits[1] = 1;
+	as->ref_bits[2] = 0;
+	as->ref_bits[3] = 0;
+
+	/* PN */
+	osmo_prbs_state_init(&pn9, &osmo_prbs9);
+	pn9.state = 31;
+	osmo_prbs_get_ubits(&as->ref_bits[4], 244, &pn9);
+
+	/* Convert to bytes */
+	osmo_ubit2pbit_ext(as->ref_bytes, 0, as->ref_bits, 0, 8*GSM_EFR_BYTES, 0);
+
+	/* Init error classes */
+	as->err_tot[0] =  50;
+	as->err_tot[1] = 125;
+	as->err_tot[2] =  73;
+	as->err_tbl = gsm_efr_bitclass;
+}
+
+static void
+_gsm_amr_gen_ref(struct app_state *as)
+{
+	struct osmo_prbs_state pn9;
+	uint8_t hdr[2];
+
+	/* Length */
+	as->ref_len = 33;
+
+	/* Header */
+	hdr[0] = 0x70;
+	hdr[1] = 0x3c;
+	osmo_pbit2ubit_ext(as->ref_bits, 0, hdr, 0, 16, 0);
+
+	/* PN */
+	osmo_prbs_state_init(&pn9, &osmo_prbs9);
+	pn9.state = 31;
+	osmo_prbs_get_ubits(&as->ref_bits[16], 244, &pn9);
+
+	/* Unused bits */
+	as->ref_bits[260] = 0;
+	as->ref_bits[261] = 0;
+	as->ref_bits[262] = 0;
+	as->ref_bits[263] = 0;
+
+	/* Convert to bytes */
+	osmo_ubit2pbit_ext(as->ref_bytes, 0, as->ref_bits, 0, 264, 0);
+
+	/* Init error classes */
+	as->err_tot[0] =  81;
+	as->err_tot[1] = 163;
+	as->err_tot[2] =  -1;
+	as->err_tbl = gsm_amr_12_2_bitclass;
+}
+
+
+static void
+_gsm_gen_ref(struct app_state *as)
+{
+	switch (as->pt) {
+	case RTP_PT_GSM_FULL:
+		_gsm_fr_gen_ref(as);
+		break;
+	case RTP_PT_GSM_EFR:
+		_gsm_efr_gen_ref(as);
+		break;
+	case RTP_PT_AMR:
+		_gsm_amr_gen_ref(as);
+		break;
+	default:
+		fprintf(stderr, "[!] Unsupported payload type for BER measurement\n");
+	}
+}
+
+static int
+_gsm_ber(struct app_state *as, const uint8_t *payload, unsigned int payload_len)
+{
+	ubit_t rx_bits[8*33];
+	int err[3];	/* Class 1a, 1b, 2 */
+	int ones;
+	int i, j;
+
+	if (payload) {
+		/* Process real-payload */
+		osmo_pbit2ubit_ext(rx_bits, 0, payload, 0, 8*payload_len, 0);
+
+		err[0] = err[1] = err[2] = 0;
+		ones = 0;
+
+		for (i = 0; i < 8 * payload_len; i++) {
+			j = as->err_tbl[i];
+			if (j >= 0) {
+				err[j] += rx_bits[i] ^ as->ref_bits[i];
+				ones += rx_bits[i];
+			}
+		}
+
+		if (ones < 32) { // This frames is probably us underrunning Tx, don't use it
+			fprintf(stderr, "[w] Frame ignored as probably TX underrun %d %d\n", as->tx_idx, as->rx_idx);
+			return 1;
+		}
+	} else {
+		/* No payload -> Lost frame completely */
+		err[0] = as->err_tot[0] / 2;
+		err[1] = as->err_tot[1] / 2;
+		err[2] = as->err_tot[2] / 2;
+	}
+
+	if (as->state == RUNNING) {
+		/* Update records */
+		if (err[0] != 0) {
+			/* Class 1a bits bad -> Frame error */
+			as->err_cnt[0]++;
+		}
+
+		as->err_cnt[1] += err[1];	/* Class 1b */
+		as->err_cnt[2] += err[2];	/* class 2  */
+
+		as->err_frames++;
+
+		/* Enough for a read-out ? */
+		if (as->err_frames == 200) {
+			printf("FBER: %4.2f    C1b RBER: %5.3f    C2 RBER: %5.3f\n",
+				100.0f * as->err_cnt[0] / as->err_frames,
+				100.0f * as->err_cnt[1] / (as->err_tot[1] * as->err_frames),
+				100.0f * as->err_cnt[2] / (as->err_tot[2] * as->err_frames)
+			);
+			memset(as->err_cnt, 0, sizeof(as->err_cnt));
+			as->err_frames = 0;
+		}
+	}
+
+	return err[0] != 0;
+}
+
+static int
+_rtp_check_payload_type(const uint8_t *payload, unsigned int payload_len)
+{
+	uint8_t ft;
+	int pt = -1;
+
+	switch (payload_len) {
+	case GSM_FR_BYTES: /* FR  or AMR 12.2k */
+		/* Check for AMR */
+		ft = (payload[1] >> 3) & 0xf;
+		if (ft == 7)
+			pt = RTP_PT_AMR;
+
+		/* Check for FR */
+		else if ((payload[0] & 0xF0) == 0xD0)
+			pt = RTP_PT_GSM_FULL;
+
+		/* None of the above */
+		else
+			fprintf(stderr, "[!] FR without 0xD0 signature or AMR with unknwon Frame Type ?!?\n");
+
+		break;
+	case GSM_EFR_BYTES: /* EFR */
+		if ((payload[0] & 0xF0) != 0xC0)
+			fprintf(stderr, "[!] EFR without 0xC0 signature ?!?\n");
+		pt = RTP_PT_GSM_EFR;
+		break;
+	case GSM_HR_BYTES: /* HR */
+		pt = RTP_PT_GSM_HALF;
+		break;
+	default: /* AMR */
+		{
+			uint8_t cmr, cmi, sti;
+			cmr = payload[0] >> 4;
+			ft = (payload[1] >> 3) & 0xf;
+
+			if (payload_len != amr_size_by_ft[ft]+2)
+				fprintf(stderr, "AMR FT %u(%s) but size %u\n",
+					ft, amr_rate_by_ft[ft], payload_len);
+
+			switch (ft) {
+			case 0: case 1: case 2: case 3:
+			case 4: case 5: case 6: case 7:
+				cmi = ft;
+				printf("AMR SPEECH with FT/CMI %u(%s), "
+					"CMR %u\n",
+					cmi, amr_rate_by_ft[cmi],
+					cmr);
+				break;
+			case 8: /* SID */
+				cmi = (payload[2+4] >> 1) & 0x7;
+				sti = payload[2+4] & 0x10;
+				printf("AMR SID %s with CMI %u(%s), CMR %u(%s)\n",
+					sti ? "UPDATE" : "FIRST",
+					cmi, amr_rate_by_ft[cmi],
+					cmr, amr_rate_by_ft[cmr]);
+				break;
+			}
+		}
+		break;
+	}
+
+	return pt;
+}
+
+static void
+rtp_timer_cb(void *priv)
+{
+	struct app_state *as = (struct app_state *)priv;
+
+	/* Send at least one frame if we're not too far ahead */
+	if (as->tx_idx < (as->rx_idx + FLOW_REG_TX_MAX_ADVANCE)) {
+		osmo_rtp_send_frame(as->rs, as->ref_bytes, as->ref_len, GSM_RTP_DURATION);
+		as->tx_idx++;
+	} else {
+		fprintf(stderr, "Skipped\n");
+	}
+
+	/* Then maybe a second one to try and catch up to RX */
+	if (as->tx_idx < (as->rx_idx + FLOW_REG_TX_MIN_ADVANCE)) {
+		osmo_rtp_send_frame(as->rs, as->ref_bytes, as->ref_len, GSM_RTP_DURATION);
+		as->tx_idx++;
+	}
+
+	/* Re-schedule */
+	osmo_timer_schedule(&as->rtp_timer, 0, 20000);
+}
+
+static int
+rtp_seq_num_diff(uint16_t new, uint16_t old)
+{
+	int d = (int)new - (int)old;
+	while (d > 49152)
+		d -= 65536;
+	while (d < -49152)
+		d += 65536;
+	return d;
+}
+
+static void
+rtp_rx_cb(struct osmo_rtp_socket *rs,
+	const uint8_t *payload, unsigned int payload_len,
+	uint16_t seq_number, uint32_t timestamp, bool marker)
+{
+	struct app_state *as = (struct app_state *)rs->priv;
+	int pt, rc, d;
+
+//	printf("Rx(%u, %d, %d, %d): %s\n", payload_len, seq_number, timestamp, marker, osmo_hexdump(payload, payload_len));
+
+	/* Identify payload */
+	pt = _rtp_check_payload_type(payload, payload_len);
+
+	/* First packet ? */
+	if (as->state == WAIT_CONN) {
+		/* Setup for this payload type */
+		as->pt = pt;
+		osmo_rtp_socket_set_pt(as->rs, pt);
+		_gsm_gen_ref(as);
+
+		/* Timer every 20 ms */
+		osmo_timer_setup(&as->rtp_timer, rtp_timer_cb, as);
+		osmo_timer_add(&as->rtp_timer);
+		osmo_timer_schedule(&as->rtp_timer, 0, 20000);
+
+		/* Init our time tracking */
+		as->rx_last_seq = seq_number;
+		as->rx_last_ts  = timestamp;
+
+		/* Now we wait for a loop */
+		as->state = WAIT_LOOP;
+	}
+
+	/* RX sequence & timstamp tracking */
+	if (rtp_seq_num_diff(seq_number, as->rx_last_seq) > 1)
+		fprintf(stderr, "[!] RTP sequence number discontinuity (%d -> %d)\n", as->rx_last_seq, seq_number);
+
+	d = (timestamp - as->rx_last_ts) / GSM_RTP_DURATION;
+
+	as->rx_idx += d;
+	as->rx_last_seq = seq_number;
+	as->rx_last_ts  = timestamp;
+
+	/* Account for missing frames in BER tracking */
+	if (d > 1) {
+		fprintf(stderr, "[!] RTP %d missing frames assumed lost @%d\n", d-1, seq_number);
+		while (--d)
+			_gsm_ber(as, NULL, 0);
+	}
+
+	/* BER analysis */
+	rc = _gsm_ber(as, payload, payload_len);
+
+	if ((as->state == WAIT_LOOP) && (rc == 0))
+		as->state = RUNNING;
+}
+
+
+int main(int argc, char **argv)
+{
+	struct app_state _as, *as = &_as;
+	int rc, port;
+
+	/* Args */
+	if (argc < 2)
+		return -1;
+
+	port = atoi(argv[1]);
+
+	/* App init */
+	memset(as, 0x00, sizeof(struct app_state));
+
+	log_init(&log_info, NULL);
+	osmo_rtp_init(NULL);
+
+	/* Start auto-connect RTP socket */
+	as->rs = osmo_rtp_socket_create(NULL, 0);
+
+	as->rs->priv = as;
+	as->rs->rx_cb = rtp_rx_cb;
+
+		/* Jitter buffer gets in the way, we want the raw traffic */
+	osmo_rtp_socket_set_param(as->rs, OSMO_RTP_P_JIT_ADAP, 0);
+	osmo_rtp_socket_set_param(as->rs, OSMO_RTP_P_JITBUF, 0);
+
+		/* Bind to requested port */
+	fprintf(stderr, "[+] Binding RTP socket on port %u...\n", port);
+	rc = osmo_rtp_socket_bind(as->rs, "0.0.0.0", port);
+	if (rc < 0) {
+		fprintf(stderr, "[!] error binding RTP socket: %d\n", rc);
+		return rc;
+	}
+
+		/* We 'connect' to the first source we hear from */
+	osmo_rtp_socket_autoconnect(as->rs);
+
+	/* Main loop */
+	while (1)
+		osmo_select_main(0);
+
+	return 0;
+}

contrib/ber/rtp_gen_map.c

@@ -0,0 +1,145 @@
+/* utility to generate codec_bit_class.h, a file with structures
+ * describing which [protection] class each bit of a given codec frame belongs to */
+
+/* (C) 2019 sysmocom - s.f.m.c. GmbH; Author: Sylvain Munaut
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <stdio.h>
+
+#include <osmocom/codec/codec.h>
+
+
+static int
+gen_table_fr(int *tbl)
+{
+	int i, j;
+
+	tbl[0] = tbl[1] = tbl[2] = tbl[3] = -1;
+
+	for (i = 0; i < 260; i++) {
+		j = 4 + gsm610_bitorder[i];
+		if (i < 50)
+			tbl[j] = 0;	/* Class 1a */
+		else if (i < 182)
+			tbl[j] = 1;	/* Class 1b */
+		else
+			tbl[j] = 2;	/* Class 2 */
+	}
+
+	return GSM_FR_BYTES * 8;
+}
+
+static int
+gen_table_efr(int *tbl)
+{
+	int i, j, k;
+
+	tbl[0] = tbl[1] = tbl[2] = tbl[3] = -1;
+
+	for (i = 0; i < 260; i++) {
+		j = gsm660_bitorder[i];
+
+		if (j < 71)
+			k = j;
+		else if (j < 73)
+			k = 71;
+		else if (j < 123)
+			k = j - 2;
+		else if (j < 125)
+			k = 119;
+		else if (j < 178)
+			k = j - 4;
+		else if (j < 180)
+			k = 172;
+		else if (j < 230)
+			k = j - 6;
+		else if (j < 232)
+			k = 222;
+		else if (j < 252)
+			k = j - 8;
+		else
+			continue;
+
+		if (i < 50)
+			tbl[k] = 0;	/* Class 1a */
+		else if (i < 182)
+			tbl[k] = 1;	/* Class 1b */
+		else
+			tbl[k] = 2;	/* Class 2 */
+	}
+
+	return GSM_EFR_BYTES * 8;
+}
+
+static int
+gen_table_amr_12_2(int *tbl)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		tbl[i] = -1;
+
+	for (i = 0; i < 244; i++)
+		tbl[i+16] = i < 81 ? 0 : 1;
+
+	for (i = 0; i < 4; i++)
+		tbl[i+16+244] = -1;
+
+	return 8 * 33;
+}
+
+
+static void
+print_table(const char  *name, int *tbl, int len)
+{
+	int i;
+
+	printf("static const int %s[] = {\n", name);
+
+	for (i = 0; i < len; i++) {
+		if ((i & 15) == 0)
+			printf("\t");
+
+		printf("%2d", tbl[i]);
+
+		if (((i & 15) == 15) || (i == len-1))
+			printf(",\n");
+		else
+			printf(", ");
+	}
+
+	printf("};\n\n");
+}
+
+
+int main(int argc, char *argv[])
+{
+	int tbl[33*8];
+	int rv;
+
+	rv = gen_table_fr(tbl);
+	print_table("gsm_fr_bitclass", tbl, rv);
+
+	rv = gen_table_efr(tbl);
+	print_table("gsm_efr_bitclass", tbl, rv);
+
+	rv = gen_table_amr_12_2(tbl);
+	print_table("gsm_amr_12_2_bitclass", tbl, rv);
+
+	return 0;
+}

contrib/jenkins_bts_trx.sh

@@ -8,8 +8,8 @@ export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
 osmo-build-dep.sh libosmocore "" --disable-doxygen
-
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 

contrib/jenkins_lc15.sh

@@ -4,12 +4,12 @@
 # shellcheck source=contrib/jenkins_common.sh
 . $(dirname "$0")/jenkins_common.sh
 
-osmo-build-dep.sh libosmocore "" --disable-doxygen
-
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmocore "" --disable-doxygen
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 osmo-layer1-headers.sh lc15 "$FIRMWARE_VERSION"

contrib/jenkins_oc2g.sh

@@ -4,12 +4,12 @@
 # shellcheck source=contrib/jenkins_common.sh
 . $(dirname "$0")/jenkins_common.sh
 
-osmo-build-dep.sh libosmocore "" --disable-doxygen
-
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmocore "" --disable-doxygen
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 osmo-layer1-headers.sh oc2g "$FIRMWARE_VERSION"

contrib/jenkins_oct.sh

@@ -4,12 +4,12 @@
 # shellcheck source=contrib/jenkins_common.sh
 . $(dirname "$0")/jenkins_common.sh
 
-osmo-build-dep.sh libosmocore "" --disable-doxygen
-
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmocore "" --disable-doxygen
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 osmo-layer1-headers.sh oct "$FIRMWARE_VERSION"

contrib/jenkins_oct_and_bts_trx.sh

@@ -8,8 +8,8 @@ export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
 osmo-build-dep.sh libosmocore "" --disable-doxygen
-
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 

contrib/jenkins_sysmobts.sh

@@ -4,12 +4,12 @@
 # shellcheck source=contrib/jenkins_common.sh
 . $(dirname "$0")/jenkins_common.sh
 
-osmo-build-dep.sh libosmocore "" --disable-doxygen
-
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
-osmo-build-dep.sh libosmo-abis
+osmo-build-dep.sh libosmocore "" --disable-doxygen
+osmo-build-dep.sh libosmo-netif "" --disable-doxygen
+osmo-build-dep.sh libosmo-abis "" --disable-dahdi
 
 cd "$deps"
 osmo-layer1-headers.sh sysmo "$FIRMWARE_VERSION"

contrib/osmo-bts.spec.in

@@ -1,117 +0,0 @@
-#
-# spec file for package osmo-bts
-#
-# 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.
-
-Name:           osmo-bts
-Version:        @VERSION@
-Release:        0
-Summary:        Osmocom BTS-Side code (Abis, scheduling)
-License:        AGPL-3.0-or-later AND GPL-2.0-only
-Group:          Productivity/Telephony/Servers
-URL:            https://osmocom.org/projects/osmobts
-Source:         %{name}-%{version}.tar.xz
-BuildRequires:  autoconf
-BuildRequires:  automake
-BuildRequires:  libtool
-BuildRequires:  pkgconfig >= 0.20
-%if 0%{?suse_version}
-BuildRequires:  systemd-rpm-macros
-%endif
-BuildRequires:  pkgconfig(libosmocodec) >= 1.7.0
-BuildRequires:  pkgconfig(libosmocoding) >= 1.7.0
-BuildRequires:  pkgconfig(libosmocore) >= 1.7.0
-BuildRequires:  pkgconfig(libosmoctrl) >= 1.7.0
-BuildRequires:  pkgconfig(libosmogsm) >= 1.7.0
-BuildRequires:  pkgconfig(libosmovty) >= 1.7.0
-BuildRequires:  pkgconfig(libosmoabis) >= 1.3.0
-BuildRequires:  pkgconfig(libosmotrau) >= 1.3.0
-### FIXME: DependencyHACK to include  osmocom/gprs/protocol/gsm_04_60.h
-BuildRequires:  pkgconfig(libosmogb)
-%{?systemd_requires}
-
-%description
-Osmocom BTS-Side code (A-bis, scheduling).
-
-%package -n osmo-bts-virtual
-Summary:        Virtual Osmocom GSM BTS (no RF hardware; GSMTAP/UDP)
-License:        GPL-2.0-or-later
-Group:          Productivity/Telephony/Utilities
-
-%description -n osmo-bts-virtual
-This version of OsmoBTS doesn't use actual GSM PHY/Hardware/RF, but
-utilizes GSMTAP-over-UDP frames for the Um interface.  This is useful
-in fully virtualized setups e.g. in combination with OsmocomBB virt_phy.
-
-%package -n osmo-bts-omldummy
-Summary:        Osmocom CI: Bring up only OML without RSL
-License:        GPL-2.0-or-later
-Group:          Productivity/Telephony/Utilities
-
-%description -n osmo-bts-omldummy
-This is used only in integration testing, where in the TTCN-3 testsuite
-we currently have no A-bis OML implementation, but only a RSL one.
-
-%prep
-%setup -q
-
-%build
-echo "%{version}" >.tarball-version
-autoreconf -fi
-%configure \
-    --docdir="%{_docdir}/%{name}" \
-    --with-systemdsystemunitdir=%{_unitdir} \
-    --enable-trx
-make V=1 %{?_smp_mflags}
-
-%install
-%make_install
-
-%if 0%{?suse_version}
-%pre    %service_add_pre    osmo-bts-trx.service
-%post   %service_add_post   osmo-bts-trx.service
-%preun  %service_del_preun  osmo-bts-trx.service
-%postun %service_del_postun osmo-bts-trx.service
-%pre    virtual %service_add_pre    osmo-bts-virtual.service
-%post   virtual %service_add_post   osmo-bts-virtual.service
-%preun  virtual %service_del_preun  osmo-bts-virtual.service
-%postun virtual %service_del_postun osmo-bts-virtual.service
-%endif
-
-%check
-make %{?_smp_mflags} check || (find . -name testsuite.log -exec cat {} +)
-
-%files
-%license COPYING
-%doc README.md
-%dir %{_docdir}/%{name}
-%dir %{_docdir}/%{name}/examples
-%dir %{_docdir}/%{name}/examples/osmo-bts-trx
-%{_docdir}/%{name}/examples/osmo-bts-trx/osmo-bts-trx-calypso.cfg
-%{_docdir}/%{name}/examples/osmo-bts-trx/osmo-bts-trx.cfg
-%dir %{_docdir}/%{name}/examples/osmo-bts-virtual
-%{_docdir}/%{name}/examples/osmo-bts-virtual/osmo-bts-virtual.cfg
-%{_bindir}/osmo-bts-trx
-%dir %{_sysconfdir}/osmocom
-%config(noreplace) %{_sysconfdir}/osmocom/osmo-bts-trx.cfg
-%{_unitdir}/osmo-bts-trx.service
-
-%files -n osmo-bts-virtual
-%{_bindir}/osmo-bts-virtual
-%dir %{_sysconfdir}/osmocom
-%config(noreplace) %{_sysconfdir}/osmocom/osmo-bts-virtual.cfg
-%{_unitdir}/osmo-bts-virtual.service
-
-%files -n osmo-bts-omldummy
-%{_bindir}/osmo-bts-omldummy
-
-%changelog

contrib/systemd/lc15bts-mgr.service

@@ -2,11 +2,15 @@
 Description=osmo-bts manager for LC15 / sysmoBTS 2100
 After=lc15-sysdev-remap.service
 Wants=lc15-sysdev-remap.service
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 NotifyAccess=all
 WatchdogSec=21780s
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
 

contrib/systemd/oc2gbts-mgr.service

@@ -2,11 +2,15 @@
 Description=osmo-bts manager for OC-2G
 After=oc2g-sysdev-remap.service
 Wants=oc2g-sysdev-remap.service
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 NotifyAccess=all
 WatchdogSec=21780s
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
 

contrib/systemd/osmo-bts-lc15.service

@@ -1,17 +1,22 @@
 [Unit]
 Description=osmo-bts for LC15 / sysmoBTS 2100
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/osmo-bts-lc15 -t 2 -s -c /etc/osmocom/osmo-bts-lc15.cfg -M
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 RuntimeDirectory=osmo-bts
 Restart=always
 RestartSec=2
-RestartPreventExitStatus=1
 
-# The msg queues must be read fast enough
+# CPU scheduling policy:
 CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=11
+# See sched(7) for further details on real-time policies and priorities
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd/osmo-bts-oc2g.service

@@ -1,17 +1,22 @@
 [Unit]
 Description=osmo-bts for OC-2G
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/osmo-bts-oc2g -s -c /etc/osmocom/osmo-bts-oc2g.cfg -M
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 RuntimeDirectory=osmo-bts
 Restart=always
 RestartSec=2
-RestartPreventExitStatus=1
 
-# The msg queues must be read fast enough
+# CPU scheduling policy:
 CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=11
+# See sched(7) for further details on real-time policies and priorities
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd/osmo-bts-sysmo.service

@@ -1,5 +1,7 @@
 [Unit]
 Description=osmo-bts for sysmocom sysmoBTS
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
@@ -7,13 +9,16 @@ ExecStartPre=/bin/sh -c 'echo 0 > /sys/class/leds/activity_led/brightness'
 ExecStart=/usr/bin/osmo-bts-sysmo -s -c /etc/osmocom/osmo-bts-sysmo.cfg -M
 ExecStopPost=/bin/sh -c 'echo 0 > /sys/class/leds/activity_led/brightness'
 ExecStopPost=/bin/sh -c 'cat /lib/firmware/sysmobts-v?.bit > /dev/fpgadl_par0 ; sleep 3s; cat /lib/firmware/sysmobts-v?.out > /dev/dspdl_dm644x_0; sleep 1s'
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
-RestartPreventExitStatus=1
 
-# The msg queues must be read fast enough
+# CPU scheduling policy:
 CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=20
+# See sched(7) for further details on real-time policies and priorities
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd/osmo-bts-trx.service

@@ -1,15 +1,24 @@
 [Unit]
 Description=Osmocom osmo-bts for osmo-trx
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/osmo-bts-trx -s -c /etc/osmocom/osmo-bts-trx.cfg
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
+User=osmocom
+Group=osmocom
+AmbientCapabilities=CAP_SYS_NICE
 
-# Let it process messages quickly enough
+# CPU scheduling policy:
 CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=11
+# See sched(7) for further details on real-time policies and priorities
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd/osmo-bts-virtual.service

@@ -1,15 +1,24 @@
 [Unit]
 Description=Osmocom GSM BTS for virtual Um layer based on GSMTAP/UDP
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/osmo-bts-virtual -s -c /etc/osmocom/osmo-bts-virtual.cfg
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
+User=osmocom
+Group=osmocom
+AmbientCapabilities=CAP_SYS_NICE
 
-# Let it process messages quickly enough
+# CPU scheduling policy:
 CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=11
+# See sched(7) for further details on real-time policies and priorities
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd/sysmobts-mgr.service

@@ -1,9 +1,13 @@
 [Unit]
 Description=osmo-bts manager for sysmoBTS
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/sysmobts-mgr -ns -c /etc/osmocom/sysmobts-mgr.cfg
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
 Restart=always
 RestartSec=2
 

debian/changelog

@@ -1,3 +1,467 @@
+osmo-bts (1.9.0) unstable; urgency=medium
+
+  [ Mychaela N. Falconia ]
+  * sysmo: generate empty TCH/H payload on FACCH/H Rx
+  * CSD: implement half-rate modes correctly
+  * csd_v110: set E2 bit correctly for TCH/[FH]4.8 NT
+  * CSD RTP: verify alignment of V.110 frames
+  * csd_v110_rtp_decode: preserve E2 & E3 bits for RLP alignment
+  * cosmetic: eliminate else-after-return in gsmtap_csd_rlp_process()
+  * cosmetic: move gsmtap_csd_rlp_process() to csd_rlp.c
+  * CSD NT modes: transmit properly aligned RLP frames on DL
+
+  [ Vadim Yanitskiy ]
+  * tests/csd: add NT variants for TCH/F4.8 and TCH/F9.6
+  * l1sap: prevent buffer overflow in l1sap_rtp_rx_cb()
+  * l1sap: move struct osmo_rlp_frame_decoded to the if-scope
+  * rsl: rsl_handle_chan_mod_ie(): set lchan->csd_mode for NT CSD
+  * vty: lchan_dump_full_vty(): print CSD mode
+  * l1sap: make send_ul_rtp_packet_hrdata() NULL-safe
+  * osmo-bts-trx: fix scheduling of DL FACCH/H for TCH/H4.8 and TCH/H2.4
+  * l1sap: l1sap_tch_rts_ind(): fix NULL ptr dereference
+  * csd_v110: use osmo_csd_ra2_* API from libosmotrau
+  * csd_v110: add CSD_V110_NUM_BITS macro
+  * csd_v110: clarify field names in csd_v110_lchan_desc[]
+  * csd_v110: clarify lchan description for TCH/F14.4
+  * csd_v110: handle TCH/F14.4
+
+  [ Pau Espin Pedrol ]
+  * jenkins.sh: libosmo-netif no longer depends on libosmo-abis
+  * bts-omldummy: Support configuring logging through cmdline
+  * bts-omldummy: print category names instead of hex values
+  * Fix missing quote char in log line
+  * abis: Log line and ts nr of signal
+  * abis: Fix reusing bts->*_link while it is being destroyed
+  * Drop use of libosmo-abis osmocom/abis/ipaccess.h
+
+  [ Philipp Maier ]
+  * pcu_sock: do not receive a TXT ind. with PCU_VERSION for a specific BTS
+
+ -- Oliver Smith <osmith@sysmocom.de>  Wed, 12 Feb 2025 12:56:09 +0100
+
+osmo-bts (1.8.0) unstable; urgency=medium
+
+  [ Vadim Yanitskiy ]
+  * osmo-bts-{oc2g,lc15}: signal CBCH support to BSC
+  * oml: oml_tx_attr_resp(): pass *mo to handle_attrs_{bts,trx}()
+  * oml: refactor generation of Get Attribute Response
+  * oml: oml_tx_attr_resp(): handle common nm_state attributes
+  * oml: implement handling of NM_ATT_IPACC_SUPP_FEATURES
+  * l1sap: l1sap_tch_ind(): fix segfault on stale TCH.ind
+  * osmo-bts-trx: rx_tchh_fn(): fix copy-pasted comment
+  * meas: also match stderr logging for meas_test
+  * meas: lchan_meas_sub_num_expected(): proper cmode enforcement
+  * meas: lchan_meas_check_compute(): fix -SUB frame substitution
+  * meas: handle VAMOS specific chan modes
+  * meas: fix ts45008_83_is_sub(): DTX is permitted on TCH/F sign
+  * meas: ts45008_83_is_sub(): properly handle CSD modes
+  * meas: lchan_meas_sub_num_expected(): handle CSD modes
+  * osmo-bts-trx: tx_tch[fh]_fn(): use BUFPOS macro everywhere
+  * osmo-bts-trx: tx_tch[fh]_fn(): rework generation of dummy FACCH
+  * osmo-bts-trx: tx_tch[fh]_fn(): fix sending idle CSD frames
+  * osmo-bts-trx: add_sbits(): simplify, improve coding style
+  * osmo-bts-trx: use BPLEN macro instead of magic numbers
+  * osmo-bts-trx: eliminate ul_bursts_prev, use the primary buffer
+  * l1sap: fix logic error in gsmtap_csd_rlp_process()
+  * osmo-bts-trx: add test VTY command to send arbitrary TRXC messages
+  * doc/examples: fix missing config files in release tarballs
+  * osmo-bts-{trx,virtual}: do not advertise TCH/F14.4 NT
+  * tests/osmo-bts.vty: aligh with recent libosmovty changes
+  * README.md: cosmetic: fix a typo
+  * doc/examples: use common 'ipa unit-id' in all files
+  * doc/examples: drop no-op 'gsmtap-sapi' lines
+  * doc/examples: osmo-bts-trx.cfg: set 'oml remote-ip' to '127.0.0.1'
+
+  [ Pau Espin Pedrol ]
+  * oml: Store RSL connect related fields in bb_transc
+  * Move trx->rsl_link to trx->bb_transc.rsl.link
+  * nm: delay RSL connect until BBTRANSC object is OPSTARTed
+  * cosmetic: oc2g_mgr: fix trailing whitespace
+  * Drop use of deprectated vty callback is_config_node
+  * Revert "trx_if: Allow calling trx_if_flush/close from within TRXC callback"
+  * trx_if: Allow calling trx_if_flush/close from within TRXC callback (v2)
+
+  [ Andreas Eversberg ]
+  * ASCI: Ignore LAPD frames from MS, while the uplink is not active
+  * Do not prefix UI header to System Information Type 10
+  * Increase RR scheduler priority to 20, to avoid dropped bursts
+  * ASCI: Add control of uplink access to osmo-bts-trx
+  * ASCI: Add control of uplink access to osmo-bts-sysmo
+  * ASCI: Enable voice group/broadcast call feature at osmo-bts-trx
+  * ASCI: Control uplink access bursts detection of physical interface
+  * ASCI: Add library requirements for uplink access to TODO-RELEASE
+  * Use uniform log format for default config files
+  * Transmit invalid AMR speech blocks instead of dummy FACCH
+  * LAPDm: Reject (release) establishment on DCCH, SAPI 0 without L3 payload
+  * Handle empty (idle) PDCH blocks gracefully
+  * Use polling based LAPDm with frame numbers
+  * OML: Add Get Attributes for supported MOs for BTS Object Class
+  * OML: Add Get Attributes for supported MOs for Radio Carrier Object Class
+  * OML: Add Get Attributes for supported MOs for Channel Object Class
+  * Fix ASCI access burst detection with osmo-bts-trx
+
+  [ Oliver Smith ]
+  * systemd: remove RestartPreventExitStatus=1
+  * contrib: remove rpm spec file
+  * contrib/systemd: run as osmocom user
+
+  [ Philipp Maier ]
+  * pcuif_proto: rename PCU_IF_FLAG_SYSMO to PCU_IF_FLAG_DIRECT_PHY
+  * pcuif_proto: clean up last remains of old PCUIF v10
+  * pcuif_proto: signal BTS model via PCUIF
+
+  [ Harald Welte ]
+  * Add GSMTAP encapsulation of RLP frames in CSD NT mode
+  * gsmtap-rlp: Add support for skipping generating NULL frames
+  * Fix license headers.
+  * sysmobts_mgr_temp: Migrate to ctrl_cmd_send2()
+  * osmo-bts-virtual: Port over to osmo_io
+  * common: Add RTP related rate counters
+  * Add funding link to github mirror
+  * README.md: Add Forum + Issue Tracker sections
+
+  [ Matan Perelman ]
+  * ctrl: Add max ber10k rach
+
+  [ Neels Hofmeyr ]
+  * early-IA: use the correct TRX
+
+  [ Keith ]
+  * vty info: MS power levels in dBm are not negative
+
+  [ Mychaela N. Falconia ]
+  * rsl.adoc: mention currently undocumented IEs
+  * rsl: parse RSL_IE_OSMO_OSMUX_CID correctly
+  * common: add support for TW-TS-001
+
+ -- Oliver Smith <osmith@sysmocom.de>  Wed, 24 Jul 2024 16:40:02 +0200
+
+osmo-bts (1.7.0) unstable; urgency=medium
+
+  [ arehbein ]
+  * common: Fix memleak in get_smscb_block()
+  * doc: Adapt to use of 'telnet_init_default'
+  * common: Remove redundant checks
+  * common: Remove unused function gsm_objclass2nmstate()
+  * gsm_objclass2mo(): Change signature/set NACK cause
+  * gsm_objclass2obj(): Change signature/set NACK cause
+  * PCU interface: Log version when starting listener
+  * common: Have PCU socket connection use osmo_wqueue
+  * common: Make socket queue max. length configurable
+
+  [ Max ]
+  * bts-virtual: fix segfault
+  * osmo-bts-trx: log TRXC/TRXD connection address
+  * osmo-bts-trx: use bool for true/false flags
+  * GSMTAP: allow configuring local address
+  * license: fix typos
+
+  [ Vadim Yanitskiy ]
+  * paging_add_imm_ass(): remove meaningless from_pcu argument
+  * osmo-bts-{trx,virtual}: clean up bts_model_l1sap_down()
+  * osmo-bts-{trx,virtual}: check lchan against NULL in bts_model_l1sap_down()
+  * osmo-bts-{trx,virtual}: set rc on error in bts_model_l1sap_down()
+  * GSMTAP: print 'gsmtap-local-host' if not NULL
+  * osmo-bts-virtual: indicate BTS_FEAT_[E]GPRS to the BSC
+  * rsl: remove redundant gsm_lchan_name() in rsl_tx_rf_rel_ack()
+  * rsl: reduce logging verbosity on some messages
+  * tests: use -no-install libtool flag to avoid ./lt-* scripts
+  * scheduler: log pchan value in trx_sched_set_pchan()
+  * osmo-bts-virtual: properly handle dynamic TS in vbts_set_ts()
+  * contrib/osmo-bts.spec.in: do not depend on libosmogb
+  * osmo-bts-trx: properly activate [CBCH/]BCCH/CCCH
+  * rsl: rsl_handle_chan_mod_ie(): add missing GSM48_CMODE_* values
+  * osmo-bts-{sysmo,lc15,oc2g}: fix segfault in ph_tch_req()
+  * tests: $(BUILT_SOURCES) is not defined, depend on osmo-bts-virtual
+  * osmo-bts-virtual: properly activate [CBCH/]BCCH/CCCH
+  * flags: add missing entries to bts_impl_flag_desc[]
+  * flags: group BTS_INTERNAL_FLAG_* into an enum
+  * flags: ensure completeness of bts_impl_flag_desc[]
+  * fixup: common: Remove unused function gsm_objclass2nmstate()
+  * oml: gsm_objclass2{mo,obj}(): cosmetic: return immediately
+  * oml: gsm_objclass2{mo,obj}(): set cause for unknown obj_class
+  * oml: reset BCCH carrier power reduction mode (if enabled)
+  * copyright: fix typo: sysmocom s/s.m.f.c./s.f.m.c./ GmbH
+  * osmo-bts-trx: alloc/free burst buffers in trx_sched_set_lchan()
+  * osmo-bts-trx: use direct pointer to chan_state->{ul,dl}_bursts
+  * osmo-bts-trx: tch_dl_dequeue(): do not drop CSD frames
+  * osmo-bts-trx: tx_pdtch_fn(): use msgb_l2len()
+  * osmo-bts-trx: fix recent regression in Tx lchan handlers
+  * osmo-bts-trx: remove redundant memset() on receipt of NOPE.ind
+  * l1sap: use gsm0502_fn2ccch_block() from libosmogsm
+  * scheduler: fix wrong union field in _sched_compose_tch_ind()
+  * scheduler: use msgb_hexdump_l2() in _sched_compose_tch_ind()
+  * scheduler: unify argument names/order for _sched_compose_*_ind()
+  * scheduler: constify *data pointer in _sched_compose_*_ind()
+  * scheduler: use size_t for data_len in _sched_compose_*_ind()
+  * fix bts_supports_cm(): properly check feature flags for VGCS/VBS
+  * measurement: suppress unsupported tch_mode warnings for CSD
+  * osmo-bts-trx: pull the AMR header in tch_dl_dequeue()
+  * osmo-bts-trx: implement CSD scheduling support
+  * osmo-bts-trx: implement FACCH/[FH] support for CSD
+  * osmo-bts-trx: implement TCH/F2.4 support for CSD
+  * osmo-bts-trx: visualize rx_tch[fh]_fn() functions
+  * osmo-bts-trx: unify and enrich 'Received bad data' logging
+  * osmo-bts-trx: rx_tchf_fn(): move compute_ber10k() above
+  * osmo-bts-trx: rx_tch[fh]_fn(): combine rc-checking ifs
+  * osmo-bts-trx: change 'Received bad data' back to LOGL_DEBUG
+  * osmo-bts-trx: tx_tch[fh]_fn(): fix NULL pointer dereference
+  * osmo-bts-trx: document/clarify the meaning of BUFMAX=24
+  * l1sap: proper rate adaptation for CSD (RFC4040 'clearmode')
+  * csd_v110_rtp_encode(): properly set E1/E2/E3 bits
+  * osmo-bts-trx: bts_supports_cm_data(): allow non-transparent modes
+  * rsl: rsl_handle_chan_mod_ie(): set lchan->csd_mode
+  * rsl: rsl_handle_chan_mod_ie(): do not use legacy defines
+  * csd_v110: fix comments in csd_v110_rtp_{en,de}code()
+  * csd_v110: properly set E1/E2/E3 for non-transparent data
+  * csd_v110: handle empty/incomplete Uplink frames gracefully
+
+  [ Philipp Maier ]
+  * pcu_sock: rename rc to fd
+  * pcu_sock: cosmetic: remove whitespace after type cast
+  * pcu_sock: cosmetic: remove unnecessary line breaks
+  * pcu_sock: do not mess with the osmo fd flags directly
+  * sched_lchan_tchx: use GSM_HR_BYTES_RTP_RFC5993 constant
+  * l1sap: fix wording in comment
+  * pcu_sock: don not continue when running out of TRX space
+  * paging: cosmetic: rename all IMM.ASS references to MAC block
+  * paging: parse PCUIF data indication outside of paging.c
+  * paging: do not confirm PAGING COMMAND messages
+  * pcu_sock: move variable declaration of imsi[4] into related scope
+  * l1sap: cosmetic: rename payload_len to rtp_pl_len
+  * pcu_sock: use PCUIF version 11 (direct TLLI)
+  * paging: also accept zero length IMSI strings 3
+  * pcuif_proto: rename tlli to msg_id
+  * pcu_sock: get rid of fn parameter in pcu_tx_pch_data_cnf
+  * pcuif_proto: remove unnecessary members from gsm_pcu_if_data_cnf_dt
+  * pcuif_proto: get rid of _DT, _dt (Direct TLLI)
+  * bts: make bts_agch_dequeue static
+  * pcuif_proto: use confirm flag in struct gsm_pcu_if_pch
+  * pcu_sock: use PCU_IF_SAPI_AGCH_2 instead PCU_IF_SAPI_AGCH
+  * pcu_sock: print SAPI and msg_id when sending confirmation
+
+  [ Pau Espin Pedrol ]
+  * bts-trx: Fix no NM Radio{Carrier,Channel} switching to Enabled if one TRX is rf_locked
+  * pcu_sock: Submit all DATA.ind regardless of link quality
+  * pcu_sock.c: Call osmo_fd_unregister() before closing and changing bfd->fd
+  * Rewrite pcu_sock_write()
+  * lchan: Improve error path logging in gsm_pchan2chan_nr()
+  * cosmetic: gsm_pchan2chan_nr(): Update spec documentation
+  * cosmetic: bts_trx.h: Fix whitespace
+  * Avoid tx RF Resource Ind for disabled TRX
+  * bts-trx: Avoid pushing interf_meas for disabled TRX
+  * contrib/ber: Avoid regenerating codec_bit_class.h every build
+  * bts-trx: Drop unused param to internal function
+  * Clarify configuration of TSC on each timeslot
+  * bts_model_apply_oml(): Drop unneded code
+  * oml.c: Remove dot character at the end of log lines
+  * nm: Apply BTS/TRX/TS OML Attributes through NM FSMs
+  * nm: Drop NM_EV_SETATTR_{ACK/NACK}
+  * oml: Get rid of unused tlv_parsed param in bts_model_apply_oml()
+  * bts_model_apply_oml(): Improve definition of parameter
+  * lc15,oc2g,sysmo: Update GPRS NM object state at the right time
+  * Simplify implementation of bts_model_opstart() in all bts types
+  * nm: Apply OPSTART through NM FSMs
+  * NM: NACK received OML OPSTART if no attributes were set beforehand
+  * Introduce NM FSM for GPRS NSE object
+  * Fix octet 2 of NM GPRS Cell
+  * Introduce NM FSM for GPRS Cell object
+  * Rearrange declaration of struct gsm_bts_gprs_nsvc
+  * Move NSVC structs to be part of NSE
+  * bts: Simplify lifecycle of BTS inside bts_list
+  * Introduce NM FSM for GPRS NSVC object
+  * nm: Dispatch NM_EV_SW_ACT in cascade to BTS SiteMgr children
+  * Merge gsm_network into gsm_bts_sm and place gsm_bts under it
+  * Move GPRS NSE under BTS SiteMgr
+  * Drop NM_EV_BBTRANSC_INSTALLED in favour of generic NM_EV_SW_ACT
+  * nm: Document current state of SW_ACT in TRX related objects
+  * Properly report all states through NM FSM upon OML link up
+  * Update g_bts_sm->num_bts when bts is added/removed from bts list
+  * Move pcu_sock_state to gprs section of bts_sm
+  * pcu_sock: Allocate pcu_sock_state using g_bts_sm talloc context
+  * pcu_sock: Drop bts_sm pointer
+  * oml: Fix potential null ptr access on trx object
+  * bts-sysmo: Fix pinst->version filled too early
+  * bts-sysmo: Delay marking phy_link as connected until L1 reset + got info
+  * vty.c: Use already available tpp pointer
+  * octphy: Fix clearly wrong noop assignment
+  * bbtransc/rcarrier: Fix statechg done twice upon NM_EV_RX_OPSTART
+  * Increase PCUIF wqueue size
+  * bts-trx: Fix CCCH not enabled if BS_AG_BLKS_RES!=1 is provided by BSC
+  * rsl: Improve logic reactivating CCCH upon SI3 BS_AG_BLKS_RES change
+
+  [ Oliver Smith ]
+  * gitignore: add vty pdf
+  * doc: rsl: add RSL_IE_IPAC_RTP_CSD_FORMAT
+  * rsl_rx_ipac_XXcx: parse csd_fmt_d/ir
+  * debian: set compat level to 10
+  * systemd: depend on networking-online.target
+  * gitignore: add arm-poky-linux-gnueabi-libtool
+  * osmo-bts-sysmo: trx_mute_on_init_cb: call bts_update_status
+  * osmo-bts-sysmo: activate_rf: no dispatch on fail
+  * osmo-bts-sysmo/l1_if: move mute_rf_compl_cb up
+  * osmo-bts-sysmo: mute PHY until OML is ready
+
+  [ Harald Welte ]
+  * DTX: bts-{sysmo,oc2g,lc15}: Print DEBUG messages about ONSET
+  * cosmetic: Replace %i with %d
+  * Introduce LOGPLCFN() for logging lchan-name + frame number
+  * bts-{sysmo,oc2g,lc15}: Fix RTP of AMR SID_FIRST_P1
+  * common/vty: Print AMR MultiRate Configuration in "show lchan"
+  * bts-{sysmo,oc2g,lc15}: Dump logical channel params during MPH-ACTIVATE.req
+  * cosmetic: use __func__ instead of __FUNCTION__
+  * lc15: fix compiler warning about wrong indent
+  * lc15: Remove unused warning
+  * lc15/oc2g: remove unused variables
+  * oc2g: Fix 'unused variable' compiler warning
+  * cosmetic: Remove "FIXME?" from Odd AMR CMI phase
+  * lc15: fix compiler warning about unused variable cell_size
+  * Replace explicit gsm_lchan_name() calls with LOGPLCHAN
+  * logging: Introduce LOGPLCGT()
+  * cosmetic: Change LOGPLCFN argument order
+  * paging: Add support for generating NLN/NLN-Status in P1 Rest Octets
+  * Add ASCI (advanced speech call items) log sub-system
+  * ASCI: NCH / NOTIFICATION support
+  * validate RSL "channel rate and type" against VGCS/VBS flags
+  * Store "Channel rate and type" from RSL Channel Mode IE in BTS
+  * ASCI: VGCS/VBS RACH -> RSL TALKER/LISTENER DETECT
+  * sysmo: Enable VGSCS + VBS feature flags
+  * omldummy: Claim to support VBS + VGCS towards BSC
+
+  [ Mychaela N. Falconia ]
+  * trx: detect UL SID in EFR just like in FR
+  * sysmo: fix handling of SID in EFR
+  * common: implement rtp continuous-streaming mode
+  * rtp continuous-streaming: fix BFI in the quality-suppressed case
+  * sysmo: emit empty RTP ticks during FACCH stealing on TCH/F
+  * bts-{lc15,oc2g,sysmo}: support EFR in repeat_last_sid()
+  * RTP input, FR & EFR: preen incoming payloads for SID errors
+  * lc15,oc2g: fix handling of SID in EFR
+  * all models, FR/EFR UL: change SID check to _is_any_sid()
+  * trx: remove model-specific BFI packet formats
+  * refactor: replace rtppayload_is_valid() with preening before enqueue
+  * all models, HR1 codec: accept both TS101318 and RFC5993 formats
+  * trx: fix HR1 codec breakage from format change
+  * trx, HR1 codec: change UL PHY output format to TS 101 318
+  * all models, HR1 codec: select RTP output format via vty option
+  * FR/HR/EFR TCH DL: implement DTX rules
+  * HR1 codec: validate ToC header in RFC5993 RTP input
+  * HR1 codec: act on SID indication in RFC5993 RTP input
+  * trx TCH DL: transmit invalid speech blocks instead of dummy FACCH
+  * ECU in UL path: make it optional per vty config
+  * ECU in UL path: move state alloc/free to l1sap
+  * ECU in UL path: move it from trx model to l1sap
+
+  [ Sylvain Munaut ]
+  * contrib: Add BER testing tool
+
+  [ Andreas Eversberg ]
+  * Change return value of bts_supports_cm() from int to bool
+  * ASCI: Add function to reactivate channel
+  * ASCI: Retrieve NCH position from System Information 1
+  * ASCI: Add Notification CHannel (NCH) support
+  * ASCI: Add support for rest octets in Paging request type 2 and 3
+  * ASCI: Send only NLN on Paging request type 1 rest octets
+  * ASCI: Add Notification/FACCH support
+  * ASCI: Repeat UPLINK FREE message until uplink becomes busy
+  * Add test cases for rest octets of Paging Requests
+  * ASCI: Enable UPLINK ACCESS on various BTS models
+
+  [ Keith ]
+  * Fix incorrect order of params passed to logging macro
+
+ -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 12 Sep 2023 16:05:30 +0200
+
+osmo-bts (1.6.0) unstable; urgency=medium
+
+  [ Vadim Yanitskiy ]
+  * osmo-bts-trx: call osmo_timer_del() unconditionally
+  * osmo-bts-trx: amr_loop: trigger the loop unconditionally
+  * osmo-bts-trx: fix handling of ciphering params in PRIM_INFO_MODIFY
+  * osmo-bts-trx: rx_rach_fn(): properly detect handover RACH
+  * osmo-bts-trx: handle MTS 0b0110 indicating an Access Burst
+  * osmo-bts-trx: use lookup tables for checking AMR CMI/CMR on Downlink
+  * osmo-bts-trx: drop ul_amr_fn_is_cmi() / dl_amr_fn_is_cmi()
+
+  [ Pau Espin Pedrol ]
+  * rsl: rx ipac crcx/mdcx: Log payload_type2
+  * logging: Move category descriptions to be in order with enum
+  * Clean up osmo-bts-*/Makefile.am
+  * Split out lchan rtp socket creation from rsl handling code
+  * Avoid counting lchan->dl_tch_queue length every time a msg is enqueued
+  * Use libosmocore API msgb_queue_free() to free lists
+  * rsl: Reduce scope of variable
+  * Move lchan_dl_tch_queue_enqueue to lchan.c and make it public
+  * cosmetic: Fix formatting of if-else block brackets
+  * Depend on libosmo-netif
+  * Clarify RTP AMR header offset in TCH enc/dec
+  * tests/*/Makefile.am: Fix typo in LIBOSMONETIF_CFLAGS
+  * tests/*/Makefile.am: Add missing libosmo-netif cflags
+  * oc2g: Makefile.am Fix typo in LIBOSMONETIF_LIBS
+  * Introduce Osmux support
+  * abis: Avoid TCP/IPA RSL sockets continue conn establishment while shutting down
+  * osmux: Log sendto() error
+  * lchan: Reset Abis RTP/Osmux config during lchan release
+  * vty: Fix SPEECH_MODE printed with hex prefix but dec value
+  * vty: Print Osmux CID on lchans using Osmux
+  * Allocate struct osmux_in_handle through new libosmo-netif APIs
+  * osmux: Drop logging of osmux internal counters
+  * osmux: Match remote address in osmux_lchan_find()
+  * osmux: Log remote address upon rx of osmux pkt
+  * osmux: Lower log level when osmux batch received for unknown CID
+  * osmux: nullify osmux.rtpst after freeing it
+  * osmux: Skip lchans in lookup which still have no remote associated
+  * osmux: Close osmux socket when bts is freed
+  * osmux: Fix null ptr dereference sending UL data before the remote is configured
+  * osmux: Rotate over available Osmux CID when allocating a new one
+  * osmux: Use new osmux_xfrm_input API to set name on each link
+  * vty: Fix typo in write-config: osmux / local-port
+  * vty: Fix typo in symbol name
+
+  [ Max ]
+  * Set working directory in systemd service file
+  * Don't manually create pid file
+  * Document realtime options in .service units
+  * Update realtime scheduling priority in service file
+  * ctrl: take both address and port from vty config
+  * Add SI10 support
+
+  [ Philipp Maier ]
+  * pcu_sock: fix sourcecode formatting
+  * measurement: do not call msgb_l3len without checking
+  * l1sap: do not call msgb_l2hlen without checking
+  * rsl: use unsigned int
+  * pcuif_proto: cosmetic: add constant PCU_IF_NUM_NSVC and replace magic numbers
+  * sched_lchan_tchf: replace numeric constant with define constant
+  * l1sap: remove unused pointer variable
+  * pcuif_proto: use define constant to specify nax number of trx
+  * pcu_sock: use ARRAY_SIZE rather then magic number
+
+  [ Keith ]
+  * osmo-bts-trx: respond to tx-attenuation config in real time.
+
+  [ Harald Welte ]
+  * update outdated vty copyright statement
+
+  [ Daniel Willmann ]
+  * shutdown_fsm: Only ramp down power when stopping bts through Ctrl-C
+  * shutdown_fsm: Add power_ramp_force() to jump straight to the tgt power
+
+  [ daniel ]
+  * Revert "shutdown_fsm: Only ramp down power when stopping bts through Ctrl-C"
+
+  [ Alexander Couzens ]
+  * OML: NSVC[1] MO should have the same initial state as NVSC[0]
+
+  [ Oliver Smith ]
+  * oc2gbts_mgr_calib: fix build against gpsd >= 3.20
+  * contrib/jenkins: build libosmo-abis without dahdi
+
+  [ arehbein ]
+  * osmo-bts: Transition to use of 'telnet_init_default'
+
+ -- Pau Espin Pedrol <pespin@sysmocom.de>  Tue, 07 Feb 2023 17:15:52 +0100
+
 osmo-bts (1.5.0) unstable; urgency=medium
 
   [ Pau Espin Pedrol ]

debian/compat

@@ -1 +1 @@
-9
+10

debian/control

@@ -2,16 +2,17 @@ Source: osmo-bts
 Maintainer: Osmocom team <openbsc@lists.osmocom.org>
 Section: net
 Priority: optional
-Build-Depends: debhelper (>= 9),
+Build-Depends: debhelper (>= 10),
                pkg-config,
                dh-autoreconf,
                autotools-dev,
                pkg-config,
-               libosmocore-dev (>= 1.7.0),
-               libosmo-abis-dev (>= 1.3.0),
+               libosmocore-dev (>= 1.11.0),
+               libosmo-abis-dev (>= 2.0.0),
+               libosmo-netif-dev (>= 1.6.0),
                libgps-dev,
                txt2man,
-               osmo-gsm-manuals-dev (>= 1.3.0)
+               osmo-gsm-manuals-dev (>= 1.6.0)
 Standards-Version: 3.9.8
 Vcs-Browser: https://gitea.osmocom.org/cellular-infrastructure/osmo-bts
 Vcs-Git: https://gitea.osmocom.org/cellular-infrastructure/osmo-bts

debian/osmo-bts-trx.postinst

@@ -0,0 +1,39 @@
+#!/bin/sh -e
+case "$1" in
+	configure)
+		# Create the osmocom group and user (if it doesn't exist yet)
+		if ! getent group osmocom >/dev/null; then
+			groupadd --system osmocom
+		fi
+		if ! getent passwd osmocom >/dev/null; then
+			useradd \
+				--system \
+				--gid osmocom \
+				--home-dir /var/lib/osmocom \
+				--shell /sbin/nologin \
+				--comment "Open Source Mobile Communications" \
+				osmocom
+		fi
+
+		# Fix permissions of previous (root-owned) install (OS#4107)
+		if dpkg --compare-versions "$2" le "1.13.0"; then
+			if [ -e /etc/osmocom/osmo-bts-trx.cfg ]; then
+				chown -v osmocom:osmocom /etc/osmocom/osmo-bts-trx.cfg
+				chmod -v 0660 /etc/osmocom/osmo-bts-trx.cfg
+			fi
+
+			if [ -d /etc/osmocom ]; then
+				chown -v root:osmocom /etc/osmocom
+				chmod -v 2775 /etc/osmocom
+			fi
+
+			mkdir -p /var/lib/osmocom
+			chown -R -v osmocom:osmocom /var/lib/osmocom
+		fi
+		;;
+esac
+
+# dh_installdeb(1) will replace this with shell code automatically
+# generated by other debhelper scripts.
+#DEBHELPER#
+

debian/osmo-bts-virtual.postinst

@@ -0,0 +1,39 @@
+#!/bin/sh -e
+case "$1" in
+	configure)
+		# Create the osmocom group and user (if it doesn't exist yet)
+		if ! getent group osmocom >/dev/null; then
+			groupadd --system osmocom
+		fi
+		if ! getent passwd osmocom >/dev/null; then
+			useradd \
+				--system \
+				--gid osmocom \
+				--home-dir /var/lib/osmocom \
+				--shell /sbin/nologin \
+				--comment "Open Source Mobile Communications" \
+				osmocom
+		fi
+
+		# Fix permissions of previous (root-owned) install (OS#4107)
+		if dpkg --compare-versions "$2" le "1.13.0"; then
+			if [ -e /etc/osmocom/osmo-bts-virtual.cfg ]; then
+				chown -v osmocom:osmocom /etc/osmocom/osmo-bts-virtual.cfg
+				chmod -v 0660 /etc/osmocom/osmo-bts-virtual.cfg
+			fi
+
+			if [ -d /etc/osmocom ]; then
+				chown -v root:osmocom /etc/osmocom
+				chmod -v 2775 /etc/osmocom
+			fi
+
+			mkdir -p /var/lib/osmocom
+			chown -R -v osmocom:osmocom /var/lib/osmocom
+		fi
+		;;
+esac
+
+# dh_installdeb(1) will replace this with shell code automatically
+# generated by other debhelper scripts.
+#DEBHELPER#
+

doc/examples/Makefile.am

@@ -1,16 +1,29 @@
-OSMOCONF_FILES = virtual/osmo-bts-virtual.cfg
+# all config examples must be listed here unconditionally, so that
+# all of them end up in the release tarball (see OS#6349)
+EXTRA_DIST = \
+	trx/osmo-bts-trx.cfg \
+	trx/osmo-bts-trx-calypso.cfg \
+	octphy/osmo-bts-trx2dsp1.cfg \
+	octphy/osmo-bts-octphy.cfg \
+	oc2g/osmo-bts-oc2g.cfg \
+	oc2g/oc2gbts-mgr.cfg \
+	sysmo/sysmobts-mgr.cfg \
+	sysmo/osmo-bts-sysmo.cfg \
+	litecell15/osmo-bts-lc15.cfg \
+	litecell15/lc15bts-mgr.cfg \
+	virtual/osmo-bts-virtual.cfg \
+	$(NULL)
 
 doc_virtualdir = $(docdir)/examples/osmo-bts-virtual
 doc_virtual_DATA = \
         virtual/osmo-bts-virtual.cfg
-EXTRA_DIST = $(doc_virtual_DATA)
+OSMOCONF_FILES = virtual/osmo-bts-virtual.cfg
 
 if ENABLE_SYSMOBTS
 doc_sysmodir = $(docdir)/examples/osmo-bts-sysmo
 doc_sysmo_DATA = \
         sysmo/osmo-bts-sysmo.cfg \
         sysmo/sysmobts-mgr.cfg
-EXTRA_DIST += $(doc_sysmo_DATA)
 OSMOCONF_FILES += sysmo/osmo-bts-sysmo.cfg sysmo/sysmobts-mgr.cfg
 endif
 
@@ -19,7 +32,6 @@ doc_trxdir = $(docdir)/examples/osmo-bts-trx
 doc_trx_DATA = \
         trx/osmo-bts-trx.cfg \
         trx/osmo-bts-trx-calypso.cfg
-EXTRA_DIST += $(doc_trx_DATA)
 OSMOCONF_FILES += trx/osmo-bts-trx.cfg
 endif
 
@@ -28,7 +40,6 @@ doc_octphydir = $(docdir)/examples/osmo-bts-octphy
 doc_octphy_DATA = \
         octphy/osmo-bts-trx2dsp1.cfg \
         octphy/osmo-bts-octphy.cfg
-EXTRA_DIST += $(doc_octphy_DATA)
 OSMOCONF_FILES += octphy/osmo-bts-octphy.cfg
 endif
 
@@ -37,7 +48,6 @@ doc_lc15dir = $(docdir)/examples/osmo-bts-lc15
 doc_lc15_DATA = \
         litecell15/osmo-bts-lc15.cfg \
         litecell15/lc15bts-mgr.cfg
-EXTRA_DIST += $(doc_lc15_DATA)
 OSMOCONF_FILES += litecell15/osmo-bts-lc15.cfg litecell15/lc15bts-mgr.cfg
 endif
 
@@ -46,7 +56,6 @@ doc_oc2gdir = $(docdir)/examples/osmo-bts-oc2g
 doc_oc2g_DATA = \
         oc2g/osmo-bts-oc2g.cfg \
         oc2g/oc2gbts-mgr.cfg
-EXTRA_DIST += $(doc_oc2g_DATA)
 OSMOCONF_FILES += oc2g/osmo-bts-oc2g.cfg oc2g/oc2gbts-mgr.cfg
 endif
 

doc/examples/litecell15/lc15bts-mgr.cfg

@@ -3,10 +3,12 @@
 !!
 !
 log stderr
- logging filter all 1
  logging color 1
- logging print category 0
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level temp info
  logging level fw info
  logging level find info

doc/examples/litecell15/osmo-bts-lc15.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl info
  logging level oml info
  logging level rll notice
@@ -35,7 +39,7 @@ phy 1
   trx-calibration-path /mnt/rom/factory/calib
 bts 0
  band 900
- ipa unit-id 1500 0
+ ipa unit-id 6969 0
  oml remote-ip 192.168.234.185
  trx 0
   phy 0 instance 0

doc/examples/oc2g/oc2gbts-mgr.cfg

@@ -3,10 +3,12 @@
 !!
 !
 log stderr
-  logging filter all 1
   logging color 1
-  logging print category 0
+  logging print category-hex 0
+  logging print category 1
   logging timestamp 0
+  logging print file basename last
+  logging print level 1
   logging level temp info
   logging level fw info
   logging level find info

doc/examples/oc2g/osmo-bts-oc2g.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
   logging color 1
+  logging print category-hex 0
+  logging print category 1
   logging timestamp 0
+  logging print file basename last
+  logging print level 1
   logging level rsl info
   logging level oml info
   logging level rll notice
@@ -32,7 +36,7 @@ phy 0
   trx-calibration-path /mnt/rom/factory/calib
 bts 0
  band 900
- ipa unit-id 1500 0
+ ipa unit-id 6969 0
  oml remote-ip 10.42.0.1
  trx 0
   phy 0 instance 0

doc/examples/octphy/osmo-bts-octphy.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl info
  logging level oml info
  logging level rll notice
@@ -25,7 +29,7 @@ phy 0
  instance 0
 bts 0
  band 1800
- ipa unit-id 1234 0
+ ipa unit-id 6969 0
  oml remote-ip 127.0.0.1
  trx 0
   phy 0 instance 0

doc/examples/octphy/osmo-bts-trx2dsp1.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl info
  logging level oml info
  logging level rll notice
@@ -26,7 +30,7 @@ phy 0
  instance 1
 bts 0
  band 1800
- ipa unit-id 1234 0
+ ipa unit-id 6969 0
  oml remote-ip 127.0.0.1
  trx 0
   phy 0 instance 0

doc/examples/sysmo/osmo-bts-sysmo.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl info
  logging level oml info
  logging level rll notice
@@ -23,7 +27,7 @@ phy 0
  instance 0
 bts 0
  band 1800
- ipa unit-id 666 0
+ ipa unit-id 6969 0
  oml remote-ip 10.1.2.3
  trx 0
   phy 0 instance 0

doc/examples/sysmo/sysmobts-mgr.cfg

@@ -3,9 +3,12 @@
 !!
 !
 log stderr
- logging filter all 1
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level temp info
  logging level fw info
  logging level find info

doc/examples/trx/osmo-bts-trx-calypso.cfg

@@ -5,7 +5,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl notice
  logging level oml notice
  logging level rll notice
@@ -30,8 +34,6 @@ phy 0
 bts 0
  oml remote-ip 127.0.0.1
  ipa unit-id 6969 0
- gsmtap-sapi pdtch
- gsmtap-sapi ccch
  band 900
  trx 0
   phy 0 instance 0

doc/examples/trx/osmo-bts-trx.cfg

@@ -4,7 +4,11 @@
 !
 log stderr
  logging color 1
+ logging print category-hex 0
+ logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl notice
  logging level oml notice
  logging level rll notice
@@ -26,8 +30,6 @@ phy 0
 bts 0
  band 1800
  ipa unit-id 6969 0
- oml remote-ip 192.168.122.1
- gsmtap-sapi ccch
- gsmtap-sapi pdtch
+ oml remote-ip 127.0.0.1
  trx 0
   phy 0 instance 0

doc/examples/virtual/osmo-bts-virtual.cfg

@@ -3,10 +3,12 @@
 !!
 !
 log stderr
- logging filter all 1
- logging color 0
+ logging color 1
+ logging print category-hex 0
  logging print category 1
  logging timestamp 0
+ logging print file basename last
+ logging print level 1
  logging level rsl info
  logging level oml info
  logging level rll notice

doc/manuals/abis/rsl.adoc

@@ -192,6 +192,7 @@ Conforms to 3GPP TS 48.058 § 8.4.20, with these exceptions:
 | 0x06 | RSL_SYSTEM_INFO_6
 | 0x0d | RSL_SYSTEM_INFO_5bis
 | 0x0e | RSL_SYSTEM_INFO_5ter
+| 0x0f | RSL_SYSTEM_INFO_10
 | 0x47 | RSL_EXT_MEAS_ORDER
 | 0x48 | RSL_MEAS_INFO
 |===
@@ -516,6 +517,7 @@ number*.
 | Destination IP Port | <<RSL_IE_IPAC_REMOTE_PORT>> | O | TV | 3
 | IP Speech Mode | <<RSL_IE_IPAC_SPEECH_MODE>> | O | TV | 2
 | RTP Payload Type 2 | <<RSL_IE_IPAC_RTP_PAYLOAD2>> | O | TV | 2
+| RTP CSD Format | <<RSL_IE_IPAC_RTP_CSD_FORMAT>> | O | TV | 2
 |===
 
 [[rsl_crcx_msg_ack]]
@@ -576,6 +578,7 @@ properties of a user-plane RTP connection.
 | Destination IP Port | <<RSL_IE_IPAC_REMOTE_PORT>> | O | TV | 3
 | IP Speech Mode | <<RSL_IE_IPAC_SPEECH_MODE>> | O | TV | 2
 | RTP Payload Type 2 | <<RSL_IE_IPAC_RTP_PAYLOAD2>> | O | TV | 2
+| RTP CSD Format | <<RSL_IE_IPAC_RTP_CSD_FORMAT>> | O | TV | 2
 |===
 
 [[rsl_mdcx_msg_ack]]
@@ -864,6 +867,8 @@ addition to those indicated in 3GPP TS 48.058 Section 9.3:
 | 0x01 | RSL_IE_CHAN_NR | <<RSL_IE_CHAN_NR>>
 | 0x60 | RSL_IE_OSMO_REP_ACCH_CAP | <<RSL_IE_OSMO_REP_ACCH_CAP>>
 | 0x61 | RSL_IE_OSMO_TRAINING_SEQUENCE | <<RSL_IE_OSMO_TRAINING_SEQUENCE>>
+| 0x62 | RSL_IE_OSMO_TEMP_OVP_ACCH_CAP | <<RSL_IE_OSMO_TEMP_OVP_ACCH_CAP>>
+| 0x63 | RSL_IE_OSMO_OSMUX_CID | <<RSL_IE_OSMO_OSMUX_CID>>
 | 0xf0 | RSL_IE_IPAC_REMOTE_IP | <<RSL_IE_IPAC_REMOTE_IP>>
 | 0xf1 | RSL_IE_IPAC_REMOTE_PORT | <<RSL_IE_IPAC_REMOTE_PORT>>
 | 0xf3 | RSL_IE_IPAC_LOCAL_PORT | <<RSL_IE_IPAC_LOCAL_PORT>>
@@ -871,6 +876,7 @@ addition to those indicated in 3GPP TS 48.058 Section 9.3:
 | 0xf5 | RSL_IE_IPAC_LOCAL_IP | <<RSL_IE_IPAC_LOCAL_IP>>
 | 0xf6 | RSL_IE_IPAC_CONN_STAT | <<RSL_IE_IPAC_CONN_STAT>>
 | 0xf8 | RSL_IE_IPAC_CONN_ID | <<RSL_IE_IPAC_CONN_ID>>
+| 0xf9 | RSL_IE_IPAC_RTP_CSD_FORMAT | <<RSL_IE_IPAC_RTP_CSD_FORMAT>>
 | 0xfc | RSL_IE_IPAC_RTP_PAYLOAD2 | <<RSL_IE_IPAC_RTP_PAYLOAD2>>
 |===
 
@@ -1085,6 +1091,49 @@ for future use.
 | 8..255 | reserved values
 |===
 
+[[RSL_IE_OSMO_TEMP_OVP_ACCH_CAP]]
+==== RSL_IE_OSMO_TEMP_OVP_ACCH_CAP
+
+FIXME: this IE has been defined, but remains to be documented.
+
+[[RSL_IE_OSMO_OSMUX_CID]]
+==== RSL_IE_OSMO_OSMUX_CID
+
+FIXME: this IE has been defined, but remains to be documented.
+
+[[RSL_IE_IPAC_RTP_CSD_FORMAT]]
+==== RSL_IE_IPAC_RTP_CSD_FORMAT
+
+This information element contains the RTP Circuit Switched Data format.
+
+.A-bis/IP RTP CSD Format
+[options="header",width="60%",cols="15%,15%,70%"]
+|===
+| Offset | Size | Description
+| 0 | 4 | RTP CSD Format D
+| 4 | 4 | RTP CSD Format IR
+|===
+
+.A-bis/IP RTP CSD Format D Values
+[options="header",width="40%",cols="20%,80%"]
+|===
+| Value | Description
+| 0 | External TRAU format
+| 1 | Non-TRAU Packed format
+| 2 | TRAU within the BTS
+| 3 | IWF-Free BTS-BTS Data
+|===
+
+.A-bis/IP RTP CSD Format IR Values
+[options="header",width="40%",cols="20%,80%"]
+|===
+| Value | Description
+| 0 | 8 kb/s
+| 1 | 16 kb/s
+| 2 | 32 kb/s
+| 3 | 48 kb/s
+|===
+
 === A-bis RSL Initialization / BTS bring-up
 
 Upon receiving the 'IPA RSL CONNECT' OML message by the respective

doc/manuals/chapters/architecture.adoc

@@ -82,14 +82,13 @@ order to specify which PHY instance is allocated to this specific TRX.
 | bts-specific | bts_model_phy_instance_set_defaults() | Called for every PHY Instance created
 | common | bts_controlif_setup() | Initialization of Control Interface
 | bts-specific | bts_model_ctrl_cmds_install() | Install model-specific control interface commands
-| common | telnet_init() | Initialization of telnet interface
+| common | telnet_init_default() | Initialization of telnet interface
 | common | pcu_sock_init() | Initialization of PCU socket
 | common | main() | Installation of signal handlers
 | common | abis_open() | Start of the A-bis connection to BSC
 | common | phy_links_open() | Iterate over list of configured PHY links
 | bts-specific | bts_model_phy_link_open() | Open each of the configured PHY links
 | bts-specific | bts_model_phy_link_close() | Close each of the configured PHY links
-| common | write_pid_file() | Generate the pid file
 | common | osmo_daemonize() | Fork as daemon in background (if configured)
 | common | bts_main() | Run main loop until global variable quit >= 2
 |===

doc/manuals/chapters/osmux_bts.adoc

@@ -0,0 +1,39 @@
+include::{commondir}/chapters/osmux/osmux.adoc[]
+
+=== Osmux Support in {program-name}
+
+Osmux usage in {program-name} in managed through the VTY commands in node
+`osmux`. Command `use (on|off|only)` is used to configure use policy of Osmux
+within {program-name}. Once enabled (`on` or `only`), {program-name} will
+announce the _OSMUX_ BTS feature towards the BSC over OML. This way, the BSC
+becomes aware that this BTS supports using Osmux to transfer voice call user
+data when the AMR codec is selected.
+
+It is then up to the BSC to decide whether to use Osmux or not when establishing
+a new call. If the BSC decides to use Osmux for a given call, then the _IPACC
+CRCX/MDCX_ messages sent by the BSC will contain an extra _Osmux CID_ IE
+appended, which contains the Osmux CID to be used by the BTS to send Osmux
+frames to the co-located BSC MGW (aka the BSC MGW' local CID, or {program-name}'
+remote CID). The IP address and port provided in the same messages refer to the
+address and port where Osmux frames with the provided CID are expected to be
+received. Similarly, {program-name} appends an _Osmux CID_ IE to the _IPACC
+CRCX/MDCX ACK_ message it generates, this time with its own local Osmux CID.
+Same goes for the BTS' local IP address and port where Osmux frames are expected
+to be received.
+
+{program-name} will behave differently during call set up based on the VTY
+command  `use (on|off|only)` presented above:
+
+* `off`: If _IPACC CRCX_ from BSC contains _Osmux CID_ IE, meaning
+  BSC wants to use Osmux for this call, then {program-name} will reject the
+  request and the call set up will fail.
+* `on`: {program-name} will support and accept both Osmux and non-Osmux (RTP)
+  upon call set up. If _IPACC CRCX_ from BSC contains the _Osmux CID_ IE on a
+  AMR call (`Channel Mode GSM3`), it will set up an Osmux stream on its end and
+  provide the BSC with the BTS-local CID. If the BSC provides no _Osmux CID_ IE,
+  then {program-name} will set up a regular RTP based call.
+* `only`: Same as per `on`, except that {program-name} will accept only Osmux
+  calls on the CN-side, this is, if  _IPACC CRCX_ from BSC doesn't
+  contain an _Osmux CID_ IE, it will reject the assignment and the call set up
+  will fail. This means also that only AMR calls (`Channel Mode GSM3`) are
+  allowed.

doc/manuals/osmobts-usermanual.adoc

@@ -1,4 +1,5 @@
 :gfdl-enabled:
+:program-name: OsmoBTS
 
 OsmoBTS User Manual
 ===================
@@ -30,6 +31,8 @@ include::{srcdir}/chapters/bts-models.adoc[]
 
 include::{srcdir}/chapters/architecture.adoc[]
 
+include::{srcdir}/chapters/osmux_bts.adoc[]
+
 include::./common/chapters/qos-dscp-pcp.adoc[]
 
 include::./common/chapters/vty_cpu_sched.adoc[]

doc/startup.txt

@@ -21,13 +21,12 @@ The start-up procedure of OsmoBTS can be described as follows:
 | bts-specific | bts_model_phy_instance_set_defaults() | Called for every PHY Instance created
 | common | bts_controlif_setup() | Initialization of Control Interface
 | bts-specific | bts_model_ctrl_cmds_install()
-| common | telnet_init() | Initialization of telnet interface
+| common | telnet_init_default() | Initialization of telnet interface
 | common | pcu_sock_init() | Initialization of PCU socket
 | common | main() | Installation of signal handlers
 | common | abis_open() | Start of the A-bis connection to BSC
 | common | phy_links_open() | Iterate over list of configured PHY links
 | bts-specific | bts_model_phy_link_open() | Open each of the configured PHY links
-| common | write_pid_file() | Generate the pid file
 | common | osmo_daemonize() | Fork as daemon in background (if configured)
 | common | bts_main() | Run main loop until global variable quit >= 2
 | bts-specific | bts_model_oml_estab() | Called by core once OML link is established

doc/trx_sched_tch.txt

@@ -0,0 +1,98 @@
+== rx_tchf_fn(): TCH/FS, TCH/EFS, TCH/AFS, TCH/F2.4, and FACCH/F
+
+  00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d |  Rx bid={0,1,2,3}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h |  Rx bid={0,1,2,3}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 4
+                                                                |
+                                                                |<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame A
+                                                                |               |<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame B
+                                                                @ decoding from here
+
+
+== rx_tchf_fn(): TCH/F14.4, TCH/F9.6, TCH/F4.8
+
+  00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+| a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x |  Rx bid={0,1,2,3}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 4
+|
+|<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame A
+|               |<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame B
+@ decoding from here
+
+
+== rx_tchh_fn(): TCH/HS, TCH/AHS
+
+  00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b |   |   |  Rx bid={0,1}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d |   |   |  Rx bid={0,1}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f |   |   |  Rx bid={0,1}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+                                                                |
+                                                                |<~~~~~~~~~~~~~>|  frame A
+                                                                |       |<~~~~~~~~~~~~~>|  frame B
+                                                                @ decoding from here
+
+
+== rx_tchh_fn(): FACCH/H
+
+  00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b |   |   |  Rx bid={0,1}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d |   |   |  Rx bid={0,1}
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f |   |   |  Rx bid={0,1}, decode
++---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+  << 2
+                                                                |
+                                                                |<~~~~~~~~~~~~~~~~~~~~~>|  frame A
+                                                                |               |<~~~~~~~~~~~~~~~~~~~~~>|  frame B
+                                                                @ decoding from here
+
+
+== rx_tchh_fn(): TCH/H4.8, TCH/H2.4
+
+  00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d |   |   |  Rx bid={0,1}
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h |   |   |  Rx bid={0,1}
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l |   |   |  Rx bid={0,1}
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p |   |   |  Rx bid={0,1}
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   |   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|   |   | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t |   |   |  Rx bid={0,1}
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+| a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v |   |   |  Rx bid={0,1}, decode
+|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+  << 2
+|
+|<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame A
+|               |<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>|  frame B
+@ decoding from here

include/osmo-bts/Makefile.am

@@ -1,9 +1,11 @@
 noinst_HEADERS = \
 	abis.h \
 	abis_osmo.h \
+	asci.h \
 	bts.h \
 	bts_model.h \
 	bts_shutdown_fsm.h \
+	bts_sm.h \
 	bts_trx.h \
 	gsm_data.h \
 	logging.h \
@@ -11,6 +13,7 @@ noinst_HEADERS = \
 	oml.h \
 	paging.h \
 	rsl.h \
+	rtp_input_preen.h \
 	signal.h \
 	vty.h \
 	amr.h \
@@ -21,6 +24,8 @@ noinst_HEADERS = \
 	tx_power.h \
 	control_if.h \
 	cbch.h \
+	csd_rlp.h \
+	csd_v110.h \
 	l1sap.h \
 	lchan.h \
 	power_control.h \
@@ -30,4 +35,6 @@ noinst_HEADERS = \
 	dtx_dl_amr_fsm.h \
 	ta_control.h \
 	nm_common_fsm.h \
+	notification.h \
+	osmux.h \
 	$(NULL)

include/osmo-bts/asci.h

@@ -0,0 +1,43 @@
+#pragma once
+#include <stdint.h>
+
+#include <osmo-bts/lchan.h>
+
+enum {
+	VGCS_TALKER_NONE = 0,
+	VGCS_TALKER_WAIT_FRAME,
+	VGCS_TALKER_ACTIVE,
+};
+
+void vgcs_rach(struct gsm_lchan *lchan, uint8_t ra, uint8_t acc_delay, uint32_t fn);
+
+void vgcs_lchan_activate(struct gsm_lchan *lchan);
+
+void vgcs_lchan_react(struct gsm_lchan *lchan);
+
+void vgcs_talker_frame(struct gsm_lchan *lchan);
+
+void vgcs_talker_reset(struct gsm_lchan *lchan, bool ul_access);
+
+void vgcs_listener_reset(struct gsm_lchan *lchan);
+
+static inline bool vgcs_is_uplink_free(struct gsm_lchan *lchan)
+{
+	return lchan->asci.uplink_free;
+}
+
+static inline void vgcs_uplink_free_get(struct gsm_lchan *lchan, uint8_t *msg)
+{
+	memcpy(msg, lchan->asci.uplink_free_msg, GSM_MACBLOCK_LEN);
+}
+
+static inline void vgcs_uplink_free_set(struct gsm_lchan *lchan, uint8_t *msg)
+{
+	memcpy(lchan->asci.uplink_free_msg, msg, GSM_MACBLOCK_LEN);
+	lchan->asci.uplink_free = true;
+}
+
+static inline void vgcs_uplink_free_reset(struct gsm_lchan *lchan)
+{
+	lchan->asci.uplink_free = false;
+}

include/osmo-bts/bts.h

@@ -5,6 +5,7 @@
 #include <osmocom/core/socket.h>
 #include <osmo-bts/gsm_data.h>
 #include <osmo-bts/bts_trx.h>
+#include <osmo-bts/osmux.h>
 
 
 struct gsm_bts_trx;
@@ -24,11 +25,21 @@ enum {
 	BTS_CTR_RACH_RCVD,
 	BTS_CTR_RACH_DROP,
 	BTS_CTR_RACH_HO,
+	BTS_CTR_RACH_VGCS,
 	BTS_CTR_RACH_CS,
 	BTS_CTR_RACH_PS,
 	BTS_CTR_AGCH_RCVD,
 	BTS_CTR_AGCH_SENT,
 	BTS_CTR_AGCH_DELETED,
+
+	BTS_CTR_RTP_RX_TOTAL,
+	BTS_CTR_RTP_RX_MARKER,
+	BTS_CTR_RTP_RX_DROP_PREEN,
+	BTS_CTR_RTP_RX_DROP_LOOPBACK,
+	BTS_CTR_RTP_RX_DROP_OVERFLOW,
+	BTS_CTR_RTP_RX_DROP_V110_DEC,
+	BTS_CTR_RTP_TX_TOTAL,
+	BTS_CTR_RTP_TX_MARKER,
 };
 
 /* Used by OML layer for BTS Attribute reporting */
@@ -52,36 +63,28 @@ enum gsm_bts_type_variant {
 };
 const char *btsvariant2str(enum gsm_bts_type_variant v);
 
-/* TODO: add a brief description of this flag */
-#define BTS_INTERNAL_FLAG_MS_PWR_CTRL_DSP		(1 << 0)
-/* When this flag is set then the measurement data is included in
- * (PRIM_PH_DATA) and struct ph_tch_param (PRIM_TCH). Otherwise the
- * measurement data is passed using a separate MPH INFO MEAS IND.
- * (See also ticket: OS#2977) */
-#define BTS_INTERNAL_FLAG_MEAS_PAYLOAD_COMB		(1 << 1)
-/* Whether the BTS model requires RadioCarrier MO to be in Enabled state
- * (OPSTARTed) before OPSTARTing the RadioChannel MOs. See OS#5157 */
-#define BTS_INTERNAL_FLAG_NM_RCHANNEL_DEPENDS_RCARRIER	(1 << 2)
-/* Whether the BTS model reports interference measurements to L1SAP. */
-#define BTS_INTERNAL_FLAG_INTERF_MEAS			(1 << 3)
+enum bts_impl_flag {
+	/* TODO: add a brief description of this flag */
+	BTS_INTERNAL_FLAG_MS_PWR_CTRL_DSP,
+	/* When this flag is set then the measurement data is included in
+	 * (PRIM_PH_DATA) and struct ph_tch_param (PRIM_TCH). Otherwise the
+	 * measurement data is passed using a separate MPH INFO MEAS IND.
+	 * (See also ticket: OS#2977) */
+	BTS_INTERNAL_FLAG_MEAS_PAYLOAD_COMB,
+	/* Whether the BTS model requires RadioCarrier MO to be in Enabled state
+	 * (OPSTARTed) before OPSTARTing the RadioChannel MOs. See OS#5157 */
+	BTS_INTERNAL_FLAG_NM_RCHANNEL_DEPENDS_RCARRIER,
+	/* Whether the BTS model reports interference measurements to L1SAP. */
+	BTS_INTERNAL_FLAG_INTERF_MEAS,
+
+	_BTS_INTERNAL_FLAG_NUM, /* must be at the end */
+};
 
 /* BTS implementation flags (internal use, not exposed via OML) */
 #define bts_internal_flag_get(bts, flag) \
-	((bts->flags & (typeof(bts->flags)) flag) != 0)
+	((bts->flags & (typeof(bts->flags))(1 << flag)) != 0)
 #define bts_internal_flag_set(bts, flag) \
-	bts->flags |= (typeof(bts->flags)) flag
-
-struct gsm_bts_gprs_nsvc {
-	struct gsm_bts *bts;
-	/* data read via VTY config file, to configure the BTS
-	 * via OML from BSC */
-	int id;
-	uint16_t nsvci;
-	struct osmo_sockaddr local;	/* on the BTS */
-	struct osmo_sockaddr remote;	/* on the SGSN */
-
-	struct gsm_abis_mo mo;
-};
+	bts->flags |= (typeof(bts->flags))(1 << flag)
 
 struct gprs_rlc_cfg {
 	uint16_t parameter[_NUM_RLC_PAR];
@@ -130,9 +133,15 @@ struct bts_power_ctrl_params {
 	} pf;
 };
 
-/* BTS Site Manager */
-struct gsm_bts_sm {
+/* GPRS CELL; ip.access specific NM Object */
+struct gsm_gprs_cell {
 	struct gsm_abis_mo mo;
+	uint16_t bvci;
+	uint8_t timer[11];
+	struct gprs_rlc_cfg rlc_cfg;
+	struct {
+		uint32_t gprs_codings;	/* see NM_IPAC_F_GPRS_CODING_* flags */
+	} support;
 };
 
 /* Struct that holds one OML-Address (Address of the BSC) */
@@ -141,9 +150,11 @@ struct bsc_oml_host {
 	char *addr;
 };
 
+#define BTS_PCU_SOCK_WQUEUE_LEN_DEFAULT 100
+
 /* One BTS */
 struct gsm_bts {
-	/* list header in net->bts_list */
+	/* list header in g_bts_sm->bts_list */
 	struct llist_head list;
 
 	/* number of the BTS in network */
@@ -157,6 +168,7 @@ struct gsm_bts {
 	/* Base Station Identification Code (BSIC), lower 3 bits is BCC,
 	 * which is used as TSC for the CCCH */
 	uint8_t bsic;
+	bool bsic_configured;
 	/* type of BTS */
 	enum gsm_bts_type_variant variant;
 	enum gsm_band band;
@@ -192,7 +204,7 @@ struct gsm_bts {
 	/* CCCH is on C0 */
 	struct gsm_bts_trx *c0;
 
-	struct gsm_bts_sm site_mgr;
+	struct gsm_bts_sm *site_mgr;
 
 	/* bitmask of all SI that are present/valid in si_buf */
 	uint32_t si_valid;
@@ -222,18 +234,7 @@ struct gsm_bts {
 
 	/* Not entirely sure how ip.access specific this is */
 	struct {
-		struct {
-			struct gsm_abis_mo mo;
-			uint16_t nsei;
-			uint8_t timer[7];
-		} nse;
-		struct {
-			struct gsm_abis_mo mo;
-			uint16_t bvci;
-			uint8_t timer[11];
-			struct gprs_rlc_cfg rlc_cfg;
-		} cell;
-		struct gsm_bts_gprs_nsvc nsvc[2];
+		struct gsm_gprs_cell cell;
 		uint8_t rac;
 	} gprs;
 
@@ -249,8 +250,9 @@ struct gsm_bts {
 		int16_t boundary[6];
 		uint8_t intave;
 	} interference;
-	unsigned int t200_ms[7];
+	uint32_t t200_fn[7];
 	unsigned int t3105_ms;
+	unsigned int t3115_ms;	/* VGCS UPLINK GRANT repeat timer */
 	struct {
 		uint8_t overload_period;
 		struct {
@@ -273,6 +275,7 @@ struct gsm_bts {
 		} rach;
 	} load;
 	uint8_t ny1;
+	uint8_t ny2;	/* maximum number of repetitions for the VGCS UPLINK GRANT */
 	uint8_t max_ta;
 
 	/* AGCH queuing */
@@ -302,6 +305,15 @@ struct gsm_bts {
 		bool pni;		/* Primary Notification Identifier */
 	} etws;
 
+	/* Advanced Speech Call Items (VBS/VGCS) + NCH related bits */
+	struct {
+		int pos_nch;		/* position of the NCH or < 0, if not available */
+		uint8_t nln, nln_status; /* current notification list number and status */
+		struct llist_head notifications;
+		int notification_entries; /* current number of entries in the list */
+		int notification_count; /* counter to count all entries */
+	} asci;
+
 	struct paging_state *paging_state;
 	struct llist_head bsc_oml_hosts;
 	unsigned int rtp_jitter_buf_ms;
@@ -313,8 +325,13 @@ struct gsm_bts {
 	int rtp_ip_dscp;
 	int rtp_priority;
 
+	bool rtp_nogaps_mode;		/* emit RTP stream without any gaps */
+	bool use_ul_ecu;		/* "rtp internal-uplink-ecu" option */
+	bool emit_hr_rfc5993;
+
 	struct {
 		uint8_t ciphers;	/* flags A5/1==0x1, A5/2==0x2, A5/3==0x4 */
+		uint8_t max_ta;		/* maximum timing advance */
 	} support;
 	struct {
 		uint8_t tc4_ctr;
@@ -359,18 +376,25 @@ struct gsm_bts {
 
 	struct {
 		char *sock_path;
+		unsigned int sock_wqueue_len_max;
 	} pcu;
 
 	/* GSMTAP Um logging (disabled by default) */
 	struct {
 		struct gsmtap_inst *inst;
 		char *remote_host;
+		char *local_host;
 		uint32_t sapi_mask;
 		uint8_t sapi_acch;
+		bool rlp;
+		bool rlp_skip_null;
 	} gsmtap;
 
+	struct osmux_state osmux;
+
 	struct osmo_fsm_inst *shutdown_fi; /* FSM instance to manage shutdown procedure during process exit */
 	bool shutdown_fi_exit_proc; /* exit process when shutdown_fsm is finished? */
+	bool shutdown_fi_skip_power_ramp; /* Skip power ramping and change power in one step? */
 	struct osmo_fsm_inst *abis_link_fi; /* FSM instance to manage abis connection during process startup and link failure */
 	struct osmo_tdef *T_defs; /* Timer defines */
 
@@ -384,24 +408,30 @@ extern void *tall_bts_ctx;
 #define GSM_BTS_HAS_SI(bts, i) ((bts)->si_valid & (1 << i))
 #define GSM_BTS_SI(bts, i)     (void *)((bts)->si_buf[i][0])
 
-static inline struct gsm_bts *gsm_bts_sm_get_bts(struct gsm_bts_sm *site_mgr) {
-	return (struct gsm_bts *)container_of(site_mgr, struct gsm_bts, site_mgr);
+static inline struct gsm_bts *gsm_gprs_cell_get_bts(struct gsm_gprs_cell *cell)
+{
+	return (struct gsm_bts *)container_of(cell, struct gsm_bts, gprs.cell);
 }
 
-struct gsm_bts *gsm_bts_alloc(void *talloc_ctx, uint8_t bts_num);
-struct gsm_bts *gsm_bts_num(const struct gsm_network *net, int num);
+struct gsm_bts *gsm_bts_alloc(struct gsm_bts_sm *bts_sm, uint8_t bts_num);
+struct gsm_bts *gsm_bts_num(const struct gsm_bts_sm *bts_sm, int num);
 
 int bts_init(struct gsm_bts *bts);
 void bts_shutdown(struct gsm_bts *bts, const char *reason);
-void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc);
+void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc, bool skip_power_ramp);
 
 int bts_link_estab(struct gsm_bts *bts);
 
 int bts_agch_enqueue(struct gsm_bts *bts, struct msgb *msg);
-struct msgb *bts_agch_dequeue(struct gsm_bts *bts);
 int bts_agch_max_queue_length(int T, int bcch_conf);
-int bts_ccch_copy_msg(struct gsm_bts *bts, uint8_t *out_buf, struct gsm_time *gt,
-		      int is_ag_res);
+
+enum ccch_msgt {
+	CCCH_MSGT_AGCH,
+	CCCH_MSGT_PCH,
+	CCCH_MSGT_NCH,
+};
+
+int bts_ccch_copy_msg(struct gsm_bts *bts, uint8_t *out_buf, struct gsm_time *gt, enum ccch_msgt ccch);
 int bts_supports_cipher(struct gsm_bts *bts, int rsl_cipher);
 uint8_t *bts_sysinfo_get(struct gsm_bts *bts, const struct gsm_time *g_time);
 void regenerate_si3_restoctets(struct gsm_bts *bts);
@@ -417,8 +447,8 @@ struct gsm_time *get_time(struct gsm_bts *bts);
 
 int bts_main(int argc, char **argv);
 
-int bts_supports_cm(const struct gsm_bts *bts,
-		    const struct rsl_ie_chan_mode *cm);
+bool bts_supports_cm(const struct gsm_bts *bts,
+		     const struct rsl_ie_chan_mode *cm);
 
 int32_t bts_get_avg_fn_advance(const struct gsm_bts *bts);
 
@@ -427,4 +457,11 @@ struct gsm_lchan *gsm_bts_get_cbch(struct gsm_bts *bts);
 
 int bts_set_c0_pwr_red(struct gsm_bts *bts, const uint8_t red);
 
+/* Context information to be put in the control buffer (db) of the AGCH msg
+ * buffer */
+struct bts_agch_msg_cb {
+	uint32_t msg_id;
+	bool confirm;
+} __attribute__ ((packed));
+
 #endif /* _BTS_H */

include/osmo-bts/bts_model.h

@@ -5,6 +5,7 @@
 
 #include <osmocom/gsm/tlv.h>
 #include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/gsm/protocol/gsm_12_21.h>
 
 #include <osmo-bts/gsm_data.h>
 
@@ -20,8 +21,8 @@ int bts_model_check_oml(struct gsm_bts *bts, uint8_t msg_type,
 			struct tlv_parsed *old_attr, struct tlv_parsed *new_attr,
 			void *obj);
 
-int bts_model_apply_oml(struct gsm_bts *bts, struct msgb *msg,
-			struct tlv_parsed *new_attr, int obj_kind, void *obj);
+int bts_model_apply_oml(struct gsm_bts *bts, const struct msgb *msg,
+			 struct gsm_abis_mo *mo, void *obj);
 
 int bts_model_opstart(struct gsm_bts *bts, struct gsm_abis_mo *mo,
 		      void *obj);

include/osmo-bts/bts_shutdown_fsm.h

@@ -1,6 +1,6 @@
 /* BTS shutdown FSM */
 
-/* (C) 2020 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
  * Author: Pau Espin Pedrol <pespin@sysmocom.de>
  *
  * All Rights Reserved
@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/osmo-bts/bts_sm.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/socket.h>
+#include <osmocom/gsm/gsm23003.h>
+
+#include <osmo-bts/oml.h>
+
+struct pcu_sock_state;
+
+/* GPRS NSVC; ip.access specific NM Object */
+struct gsm_gprs_nse;
+struct gsm_gprs_nsvc {
+	struct gsm_abis_mo mo;
+	struct gsm_gprs_nse *nse;
+	/* data read via VTY config file, to configure the BTS
+	 * via OML from BSC */
+	int id;
+	uint16_t nsvci;
+	struct osmo_sockaddr local;	/* on the BTS */
+	struct osmo_sockaddr remote;	/* on the SGSN */
+};
+
+/* GPRS NSE; ip.access specific NM Object */
+struct gsm_gprs_nse {
+	struct gsm_abis_mo mo;
+	uint16_t nsei;
+	uint8_t timer[7];
+	struct gsm_gprs_nsvc nsvc[2];
+};
+
+struct gsm_bts *gsm_gprs_nse_get_bts(const struct gsm_gprs_nse *nse);
+
+/* BTS Site Manager */
+struct gsm_bts_sm {
+	struct gsm_abis_mo mo;
+	struct llist_head bts_list;
+	unsigned int num_bts;
+	struct osmo_plmn_id plmn;
+	struct {
+		struct pcu_sock_state *pcu_state;
+		struct gsm_gprs_nse nse;
+	} gprs;
+};
+
+extern struct gsm_bts_sm *g_bts_sm;
+
+struct gsm_bts_sm *gsm_bts_sm_alloc(void *talloc_ctx);

include/osmo-bts/bts_trx.h

@@ -1,9 +1,16 @@
 #pragma once
 
+#include <osmocom/core/sockaddr_str.h>
 #include <osmo-bts/gsm_data.h>
 
 struct gsm_bts_bb_trx {
 	struct gsm_abis_mo mo;
+	/* how do we talk RSL with this TRX? */
+	struct {
+		struct osmo_sockaddr_str rem_addrstr;
+		uint8_t tei;
+		struct e1inp_sign_link *link;
+	} rsl;
 };
 
 /* One TRX in a BTS */
@@ -16,9 +23,6 @@ struct gsm_bts_trx {
 	uint8_t nr;
 	/* human readable name / description */
 	char *description;
-	/* how do we talk RSL with this TRX? */
-	uint8_t rsl_tei;
-	struct e1inp_sign_link *rsl_link;
 
 	/* NM Radio Carrier and Baseband Transciever */
 	struct gsm_abis_mo mo;
@@ -27,8 +31,8 @@ struct gsm_bts_trx {
 	uint16_t arfcn;
 	int nominal_power;		/* in dBm */
 	unsigned int max_power_red;	/* in actual dB */
-        uint8_t max_power_backoff_8psk; /* in actual dB OC-2G only */
-        uint8_t c0_idle_power_red;      /* in actual dB OC-2G only */
+	uint8_t max_power_backoff_8psk; /* in actual dB OC-2G only */
+	uint8_t c0_idle_power_red;      /* in actual dB OC-2G only */
 
 	uint8_t ta_ctrl_interval; /* 1 step is 2 SACCH periods */
 
@@ -40,6 +44,12 @@ struct gsm_bts_trx {
 	/* The associated PHY instance */
 	struct phy_instance *pinst;
 
+	struct {
+		uint32_t freq_bands;	/* see NM_IPAC_F_FREQ_BAND_* flags */
+		uint32_t chan_types;	/* see NM_IPAC_F_CHANT_* flags */
+		uint32_t chan_modes;	/* see NM_IPAC_F_CHANM_* flags */
+	} support;
+
 	struct gsm_bts_trx_ts ts[TRX_NR_TS];
 };
 
@@ -58,6 +68,7 @@ int trx_link_estab(struct gsm_bts_trx *trx);
 void trx_operability_update(struct gsm_bts_trx *trx);
 
 uint8_t num_agch(const struct gsm_bts_trx *trx, const char * arg);
+int pos_nch(const struct gsm_bts_trx *trx, const char *arg);
 bool trx_ms_pwr_ctrl_is_osmo(const struct gsm_bts_trx *trx);
 
 #define LOGPTRX(trx, ss, lvl, fmt, args...) LOGP(ss, lvl, "%s " fmt, gsm_trx_name(trx), ## args)

include/osmo-bts/control_if.h

@@ -1,5 +1,4 @@
 #pragma once
 
 int bts_ctrl_cmds_install(struct gsm_bts *bts);
-struct ctrl_handle *bts_controlif_setup(struct gsm_bts *bts,
-					const char *bind_addr, uint16_t port);
+struct ctrl_handle *bts_controlif_setup(struct gsm_bts *bts, uint16_t port);

include/osmo-bts/csd_rlp.h

@@ -0,0 +1,36 @@
+/*
+ * Declarations for functions in csd_rlp.c: alignment of downlink RLP frames
+ * and RLP GSMTAP mechanism for CSD NT modes.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <osmocom/core/bits.h>
+#include <osmocom/gsm/l1sap.h>
+#include <osmo-bts/lchan.h>
+
+extern const uint8_t csd_tchf48_nt_e2_map[26];
+
+/* Per TS 48.020 section 15.1, the cadence of E2+E3 bits in a properly
+ * aligned sequence of pseudo-V.110 frames forming a single RLP frame
+ * is 00-01-10-11.  The following constant captures this bit sequence
+ * in hex, for comparison against align_bits output from
+ * csd_v110_rtp_decode() or against rlpdl_align_bits accumulator
+ * in CSD NT lchan state.
+ */
+#define	NTCSD_ALIGNED_EBITS	0x1B
+
+void ntcsd_dl_reset(struct gsm_lchan *lchan);
+void ntcsd_dl_input_48(struct gsm_lchan *lchan, const ubit_t *data_bits,
+			uint8_t align_bits);
+void ntcsd_dl_input_96(struct gsm_lchan *lchan, const ubit_t *data_bits,
+			uint8_t align_bits);
+bool ntcsd_dl_output(struct gsm_lchan *lchan, ubit_t *rlp_frame_out);
+
+void gsmtap_csd_rlp_process(struct gsm_lchan *lchan, bool is_uplink,
+			    const struct ph_tch_param *tch_ind,
+			    const ubit_t *data, unsigned int data_len);
+void gsmtap_csd_rlp_dl(struct gsm_lchan *lchan, uint32_t fn,
+			const ubit_t *data, unsigned int data_len);

include/osmo-bts/csd_v110.h

@@ -0,0 +1,24 @@
+#pragma once
+
+/* RFC4040 "clearmode" RTP payload length */
+#define RFC4040_RTP_PLEN 160
+
+struct gsm_lchan;
+
+struct csd_v110_lchan_desc {
+	uint16_t num_frames;		/* number of V.110 frames in a radio block */
+	uint16_t num_frame_bits;	/* number of bits in each V.110 frame */
+	uint16_t num_other_bits;	/* number of other bits (e.g. M-bits for TCH/F14.4) */
+	uint8_t ra2_ir;			/* intermediate rate (8 or 16 kbit/s) for RA2 step */
+};
+
+extern const struct csd_v110_lchan_desc csd_v110_lchan_desc[256];
+
+#define CSD_V110_NUM_BITS(desc) \
+	((desc)->num_frames * (desc)->num_frame_bits + (desc)->num_other_bits)
+
+int csd_v110_rtp_encode(const struct gsm_lchan *lchan, uint8_t *rtp,
+			const uint8_t *data, size_t data_len,
+			uint8_t nt48_half_num);
+int csd_v110_rtp_decode(const struct gsm_lchan *lchan, uint8_t *data,
+			uint8_t *align_bits, const uint8_t *rtp, size_t rtp_len);

include/osmo-bts/gsm_data.h

@@ -41,12 +41,6 @@
 #define GSM_BTS_AGCH_QUEUE_LOW_LEVEL_DEFAULT 41
 #define GSM_BTS_AGCH_QUEUE_HIGH_LEVEL_DEFAULT 91
 
-struct gsm_network {
-	struct llist_head bts_list;
-	unsigned int num_bts;
-	struct osmo_plmn_id plmn;
-	struct pcu_sock_state *pcu_state;
-};
 
 /* 16 is the max. number of SI2quater messages according to 3GPP TS 44.018 Table 10.5.2.33b.1:
    4-bit index is used (2#1111 = 10#15) */
@@ -58,12 +52,59 @@ struct gsm_network {
 /* lchans 0..3 are SDCCH in combined channel configuration,
    use 4 as magic number for BCCH hack - see osmo-bts-../oml.c:opstart_compl() */
 #define CCCH_LCHAN 4
+#define CBCH_LCHAN 2
 
 #define TRX_NR_TS	8
 #define TS_MAX_LCHAN	8
 
 #define MAX_VERSION_LENGTH 64
 
+/* NM_IPAC_F_CHANT_* mask for NM_IPAC_EIE_CHAN_TYPES (common) */
+#define NM_IPAC_MASK_CHANT_COMMON \
+	(NM_IPAC_F_CHANT_TCHF		| \
+	 NM_IPAC_F_CHANT_TCHH		| \
+	 NM_IPAC_F_CHANT_SDCCH8		| \
+	 NM_IPAC_F_CHANT_BCCH		| \
+	 NM_IPAC_F_CHANT_BCCH_SDCCH4)
+/* NM_IPAC_F_CHANM_SPEECH_* mask for NM_IPAC_EIE_CHAN_MODES */
+#define NM_IPAC_MASK_CHANM_SPEECH \
+	(NM_IPAC_F_CHANM_SPEECH_FS	| \
+	 NM_IPAC_F_CHANM_SPEECH_EFS	| \
+	 NM_IPAC_F_CHANM_SPEECH_AFS	| \
+	 NM_IPAC_F_CHANM_SPEECH_HS	| \
+	 NM_IPAC_F_CHANM_SPEECH_AHS)
+/* NM_IPAC_F_CHANM_CSD_NT_* mask for NM_IPAC_EIE_CHAN_MODES */
+#define NM_IPAC_MASK_CHANM_CSD_NT \
+	(NM_IPAC_F_CHANM_CSD_NT_4k8	| \
+	 NM_IPAC_F_CHANM_CSD_NT_9k6	| \
+	 NM_IPAC_F_CHANM_CSD_NT_14k4)
+/* NM_IPAC_F_CHANM_CSD_T_* mask for NM_IPAC_EIE_CHAN_MODES */
+#define NM_IPAC_MASK_CHANM_CSD_T \
+	(NM_IPAC_F_CHANM_CSD_T_1200_75	| \
+	 NM_IPAC_F_CHANM_CSD_T_600	| \
+	 NM_IPAC_F_CHANM_CSD_T_1k2	| \
+	 NM_IPAC_F_CHANM_CSD_T_2k4	| \
+	 NM_IPAC_F_CHANM_CSD_T_4k8	| \
+	 NM_IPAC_F_CHANM_CSD_T_9k6	| \
+	 NM_IPAC_F_CHANM_CSD_T_14k4)
+/* NM_IPAC_F_GPRS_CODING_CS[1-4] mask for NM_IPAC_EIE_GPRS_CODING */
+#define NM_IPAC_MASK_GPRS_CODING_CS \
+	(NM_IPAC_F_GPRS_CODING_CS1	| \
+	 NM_IPAC_F_GPRS_CODING_CS2	| \
+	 NM_IPAC_F_GPRS_CODING_CS3	| \
+	 NM_IPAC_F_GPRS_CODING_CS4)
+/* NM_IPAC_F_GPRS_CODING_MCS[1-9] mask for NM_IPAC_EIE_GPRS_CODING */
+#define NM_IPAC_MASK_GPRS_CODING_MCS \
+	(NM_IPAC_F_GPRS_CODING_MCS1	| \
+	 NM_IPAC_F_GPRS_CODING_MCS2	| \
+	 NM_IPAC_F_GPRS_CODING_MCS3	| \
+	 NM_IPAC_F_GPRS_CODING_MCS4	| \
+	 NM_IPAC_F_GPRS_CODING_MCS5	| \
+	 NM_IPAC_F_GPRS_CODING_MCS6	| \
+	 NM_IPAC_F_GPRS_CODING_MCS7	| \
+	 NM_IPAC_F_GPRS_CODING_MCS8	| \
+	 NM_IPAC_F_GPRS_CODING_MCS9)
+
 enum gsm_bts_trx_ts_flags {
 	TS_F_PDCH_ACTIVE =		0x1000,
 	TS_F_PDCH_ACT_PENDING =		0x2000,
@@ -90,7 +131,10 @@ struct gsm_bts_trx_ts {
 
 	/* Training Sequence Code (range 0..7) */
 	uint8_t tsc_oml; /* configured via OML */
-	uint8_t tsc; /* currently in use */
+	bool tsc_oml_configured;
+	uint8_t tsc_rsl; /* configured via RSL (Osmo extension) */
+	bool tsc_rsl_configured;
+	uint8_t tsc; /* TSC currently in use. Preference: RSL, OML, BTS-BSIC-OML */
 	/* Training Sequence Set (range 0..3) */
 	uint8_t tsc_set;
 
@@ -193,6 +237,8 @@ int conf_lchans_as_pchan(struct gsm_bts_trx_ts *ts,
 
 bool ts_is_pdch(const struct gsm_bts_trx_ts *ts);
 
+void gsm_ts_apply_configured_tsc(struct gsm_bts_trx_ts *ts);
+
 void gsm_ts_release(struct gsm_bts_trx_ts *ts);
 
 #endif /* _GSM_DATA_H */

include/osmo-bts/l1sap.h

@@ -4,6 +4,8 @@
 #include <osmocom/gsm/protocol/gsm_04_08.h>
 #include <osmocom/gsm/protocol/gsm_08_58.h>
 
+#define L1SAP_MSGB_HEADROOM 128
+
 /* lchan link ID */
 #define LID_SACCH 0x40
 #define LID_DEDIC 0x00
@@ -100,6 +102,7 @@ int l1sap_chan_act(struct gsm_bts_trx *trx, uint8_t chan_nr);
 int l1sap_chan_rel(struct gsm_bts_trx *trx, uint8_t chan_nr);
 int l1sap_chan_deact_sacch(struct gsm_bts_trx *trx, uint8_t chan_nr);
 int l1sap_chan_modify(struct gsm_bts_trx *trx, uint8_t chan_nr);
+int l1sap_uplink_access(struct gsm_lchan *lchan, bool active);
 
 enum l1sap_common_sapi {
 	L1SAP_COMMON_SAPI_UNKNOWN,
@@ -139,9 +142,11 @@ int add_l1sap_header(struct gsm_bts_trx *trx, struct msgb *rmsg,
 
 #define msgb_l1sap_prim(msg) ((struct osmo_phsap_prim *)(msg)->l1h)
 
+void radio_link_timeout_reset(struct gsm_lchan *lchan);
+
 int bts_check_for_first_ciphrd(struct gsm_lchan *lchan,
 				uint8_t *data, int len);
 
-int is_ccch_for_agch(struct gsm_bts_trx *trx, uint32_t fn);
+enum ccch_msgt get_ccch_msgt(struct gsm_bts_trx *trx, uint32_t fn);
 
 #endif /* L1SAP_H */

include/osmo-bts/lchan.h

@@ -2,11 +2,14 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <netinet/in.h>
 
+#include <osmocom/core/bits.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/logging.h>
 #include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/codec/codec.h>
 #include <osmocom/codec/ecu.h>
 #include <osmocom/gsm/lapdm.h>
 #include <osmocom/gsm/sysinfo.h>
@@ -14,6 +17,7 @@
 #include <osmocom/gsm/gsm48_rest_octets.h>
 #include <osmocom/gsm/protocol/gsm_04_08.h>
 #include <osmocom/gsm/meas_rep.h>
+#include <osmocom/netif/osmux.h>
 
 #include <osmo-bts/power_control.h>
 
@@ -72,17 +76,25 @@ struct amr_multirate_conf {
 };
 
 enum lchan_csd_mode {
-	LCHAN_CSD_M_NT,
+	LCHAN_CSD_M_NT = 0,
 	LCHAN_CSD_M_T_1200_75,
 	LCHAN_CSD_M_T_600,
 	LCHAN_CSD_M_T_1200,
 	LCHAN_CSD_M_T_2400,
+	LCHAN_CSD_M_T_4800,
 	LCHAN_CSD_M_T_9600,
 	LCHAN_CSD_M_T_14400,
 	LCHAN_CSD_M_T_29000,
 	LCHAN_CSD_M_T_32000,
+	_LCHAN_CSD_M_NUM,
 };
 
+extern const struct value_string lchan_csd_mode_descs[];
+static inline const char *lchan_csd_mode_desc(enum lchan_csd_mode mode)
+{
+	return get_value_string(lchan_csd_mode_descs, mode);
+}
+
 /* State of the SAPIs in the lchan */
 enum lchan_sapi_state {
 	LCHAN_SAPI_S_NONE,
@@ -138,6 +150,8 @@ struct gsm_lchan {
 	uint8_t nr;
 	/* The logical channel type */
 	enum gsm_chan_t type;
+	/* RSL channel rate and type */
+	enum rsl_cmod_crt rsl_chan_rt;
 	/* RSL channel mode */
 	enum rsl_cmod_spd rsl_cmode;
 	/* If TCH, traffic channel mode */
@@ -161,7 +175,20 @@ struct gsm_lchan {
 		uint16_t conn_id;
 		uint8_t rtp_payload;
 		uint8_t rtp_payload2;
+		uint8_t rtp_extensions;
 		uint8_t speech_mode;
+		struct {
+			bool use;
+			uint8_t local_cid;
+			uint8_t remote_cid;
+			/* Rx Osmux -> RTP, one allocated & owned per lchan */
+			struct osmux_out_handle *out;
+			 /* Tx RTP -> Osmux, shared by all lchans sharing a
+			  * remote endp (addr+port), see "struct osmux_handle" */
+			struct osmux_in_handle *in;
+			/* Used to build rtp messages we send to osmux */
+			struct osmo_rtp_handle *rtpst;
+		} osmux;
 		struct osmo_rtp_socket *rtp_socket;
 	} abis_ip;
 
@@ -189,7 +216,10 @@ struct gsm_lchan {
 	uint8_t sapis_dl[23];
 	uint8_t sapis_ul[23];
 	struct lapdm_channel lapdm_ch;
+	/* It is required to have L3 info with DL establishment. */
+	bool l3_info_estab;
 	struct llist_head dl_tch_queue;
+	unsigned int dl_tch_queue_len;
 	struct {
 		/* bitmask of all SI that are present/valid in si_buf */
 		uint32_t valid;
@@ -250,9 +280,34 @@ struct gsm_lchan {
 			/* last UL SPEECH resume flag */
 			bool is_speech_resume;
 		} dtx;
+		struct {
+			bool last_rtp_input_was_sid;
+			uint8_t last_sid[GSM_FR_BYTES];
+			uint8_t last_sid_len;
+			uint8_t last_sid_age;
+			/* A SID was transmitted on the DL in the period
+			 * beginning with the last transmitted speech frame
+			 * or the last mandatory-Tx position, whichever was
+			 * more recent. */
+			bool dl_sid_transmitted;
+			/* The current frame in the DL is taken up by FACCH */
+			bool dl_facch_stealing;
+			/* UL SID filter to catch DTXu half-blocks,
+			 * see tch_ul_fr_hr_efr() function. */
+			bool ul_sid_filter;
+		} dtx_fr_hr_efr;
 		uint8_t last_cmr;
 		uint32_t last_fn;
-
+		struct {
+			/* RLP GSMTAP mechanism */
+			uint8_t rlp_buf_ul[576/8]; /* maximum size of RLP frame */
+			uint8_t rlp_buf_dl[576/8]; /* maximum size of RLP frame */
+			/* alignment of RLP frames in DL for NT modes */
+			ubit_t rlpdl_data_bits[60 * 7];
+			uint16_t rlpdl_align_bits;
+			uint8_t rlpdl_fill_level;
+			ubit_t tchf48_nt_2ndhalf[120];
+		} csd;
 	} tch;
 
 	/* 3GPP TS 48.058 § 9.3.37: [0; 255] ok, -1 means invalid*/
@@ -272,6 +327,19 @@ struct gsm_lchan {
 		/* counts up to Ny1 */
 		unsigned int phys_info_count;
 	} ho;
+	struct {
+		bool listener_detected;
+		uint8_t talker_active;
+		uint8_t ref;
+		uint32_t fn;
+		/* T3115: VGCS UPLINK GRANT retransmission */
+		struct osmo_timer_list t3115;
+		/* counts up to Ny2 */
+		unsigned int vgcs_ul_grant_count;
+		/* uplink free message */
+		bool uplink_free;
+		uint8_t uplink_free_msg[GSM_MACBLOCK_LEN];
+	} asci;
 	/* S counter for link loss */
 	int s;
 	/* Kind of the release/activation. E.g. RSL or PCU */
@@ -354,6 +422,12 @@ int lchan2ecu_codec(const struct gsm_lchan *lchan);
 
 void lchan_set_state(struct gsm_lchan *lchan, enum gsm_lchan_state state);
 
+int lchan_rtp_socket_create(struct gsm_lchan *lchan, const char *bind_ip);
+int lchan_rtp_socket_connect(struct gsm_lchan *lchan, const struct in_addr *ia, uint16_t connect_port);
+void lchan_rtp_socket_free(struct gsm_lchan *lchan);
+
+void lchan_dl_tch_queue_enqueue(struct gsm_lchan *lchan, struct msgb *msg, unsigned int limit);
+
 static inline bool lchan_is_dcch(const struct gsm_lchan *lchan)
 {
 	switch (lchan->type) {

include/osmo-bts/logging.h

@@ -20,6 +20,8 @@ enum {
 	DLOOP,
 	DABIS,
 	DRTP,
+	DOSMUX,
+	DASCI,
 };
 
 extern const struct log_info bts_log_info;
@@ -36,4 +38,12 @@ extern const struct log_info bts_log_info;
 #define DEBUGPFN(ss, fn, fmt, args...) \
 	LOGP(ss, LOGL_DEBUG, "%s " fmt, gsm_fn_as_gsmtime_str(fn), ## args)
 
+/* LOGP with lchan + frame number prefix */
+#define LOGPLCFN(lchan, fn, ss, lvl, fmt, args...) \
+	LOGP(ss, lvl, "%s %s " fmt, gsm_lchan_name(lchan), gsm_fn_as_gsmtime_str(fn), ## args)
+
+/* LOGP with lchan + gsm_time prefix */
+#define LOGPLCGT(lchan, gt, ss, lvl, fmt, args...) \
+	LOGP(ss, lvl, "%s %s " fmt, gsm_lchan_name(lchan), osmo_dump_gsmtime(gt), ## args)
+
 #endif /* _LOGGING_H */

include/osmo-bts/msg_utils.h

@@ -13,14 +13,49 @@
 
 struct msgb;
 
-/* Access 1st part of msgb control buffer */
+/****************************************************************
+* Accessor macros for control buffer words in RTP input path (DL)
+*****************************************************************/
+
+/* Storing RTP header fields in the path from RTP and Osmux
+ * Rx callback functions to TCH-RTS.ind handling.
+ * FIXME: do we really need this RTP header info downstream
+ * of the jitter buffer mechanism in the RTP endpoint library?
+ */
 #define rtpmsg_marker_bit(x) ((x)->cb[0])
+#define rtpmsg_seq(x)        ((x)->cb[1])
+#define rtpmsg_ts(x)         ((x)->cb[2])
 
-/* Access 2nd part of msgb control buffer */
-#define rtpmsg_seq(x) ((x)->cb[1])
+/* l1sap_rtp_rx_cb() does some preening or preparsing on some
+ * RTP payloads, and in two cases (HR with RFC 5993 input and
+ * CSD NT modes) this preparsing step produces some metadata
+ * that need to be passed to TCH-RTS.ind handling.
+ */
+#define rtpmsg_is_rfc5993_sid(x) ((x)->cb[3])
+#define rtpmsg_csd_align_bits(x) ((x)->cb[4])
 
-/* Access 3rd part of msgb control buffer */
-#define rtpmsg_ts(x) ((x)->cb[2])
+/********************************************************
+* Accessor macros for control buffer words in TCH UL path
+*********************************************************/
+
+/* We provide an ability for BTS models to indicate BFI along with payload
+ * bits just like in GSM 08.60 TRAU-UL frames, and the same BFI flag can
+ * then be set by model-independent functions for higher-level BFI
+ * conditions.  This cb word shall act as a Boolean flag.
+ */
+#define tch_ul_msg_bfi(x) ((x)->cb[0])
+
+/* For HRv1 codec, we have to pass SID classification from the function
+ * that makes the initial determination to TS 101 318, RFC 5993 and
+ * TW-TS-002 output functions.  Per classic GSM specs, common across
+ * FR/HR/EFR, SID classification code is an integer equal to 0, 1 or 2;
+ * in Osmocom it is enum osmo_gsm631_sid_class.
+ *
+ * NOTE: while the actual SID ternary classification exists in exactly
+ * the same form across all 3 of FR/HR/EFR, we store it in a cb word
+ * only for HR codec where we need it for RTP output functions.
+ */
+#define tch_ul_msg_hr_sid(x) ((x)->cb[1])
 
 /**
  * Classification of OML message. ETSI for plain GSM 12.21

include/osmo-bts/nm_common_fsm.h

@@ -1,7 +1,7 @@
 /* Header for all NM FSM. Following 3GPP TS 12.21 Figure 2/GSM 12.21:
   GSM 12.21 Objects' Operational state and availability status behaviour during initialization */
 
-/* (C) 2020 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
  * Author: Pau Espin Pedrol <pespin@sysmocom.de>
  *
  * All Rights Reserved
@@ -14,7 +14,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -30,18 +30,18 @@
 /* Common */
 enum nm_fsm_events {
 	NM_EV_SW_ACT,
-	NM_EV_SETATTR_ACK, /* data: struct nm_fsm_ev_setattr_data */
-	NM_EV_SETATTR_NACK, /* data: struct nm_fsm_ev_setattr_data */
+	NM_EV_RX_SETATTR, /* data: struct nm_fsm_ev_setattr_data */
+	NM_EV_RX_OPSTART,
 	NM_EV_OPSTART_ACK,
 	NM_EV_OPSTART_NACK,
 	NM_EV_SHUTDOWN_START,
 	NM_EV_SHUTDOWN_FINISH,
+	NM_EV_OML_UP,
 	NM_EV_RSL_UP, /* RadioCarrier and BaseBand Transceiver only */
 	NM_EV_RSL_DOWN,  /* RadioCarrier and BaseBand Transceiver only */
 	NM_EV_PHYLINK_UP, /* RadioCarrier and BaseBand Transceiver only */
 	NM_EV_PHYLINK_DOWN,  /* RadioCarrier and BaseBand Transceiver only */
 	NM_EV_DISABLE,  /* RadioCarrier and BaseBand Transceiver only */
-	NM_EV_BBTRANSC_INSTALLED, /* Radio Channel only */
 	NM_EV_BBTRANSC_ENABLED, /* Radio Channel only */
 	NM_EV_BBTRANSC_DISABLED, /* Radio Channel only */
 	NM_EV_RCARRIER_ENABLED, /* Radio Channel only */
@@ -50,8 +50,7 @@ enum nm_fsm_events {
 extern const struct value_string nm_fsm_event_names[];
 
 struct nm_fsm_ev_setattr_data {
-	struct msgb *msg; /* msgb ownership is transferred to FSM */
-	int cause;
+	const struct msgb *msg;
 };
 
 
@@ -95,3 +94,30 @@ enum nm_chan_op_fsm_states {
         NM_CHAN_ST_OP_ENABLED,
 };
 extern struct osmo_fsm nm_chan_fsm;
+
+/* GPRS NSE */
+enum nm_gprs_nse_op_fsm_states {
+	NM_GPRS_NSE_ST_OP_DISABLED_NOTINSTALLED,
+	NM_GPRS_NSE_ST_OP_DISABLED_DEPENDENCY,
+	NM_GPRS_NSE_ST_OP_DISABLED_OFFLINE,
+	NM_GPRS_NSE_ST_OP_ENABLED,
+};
+extern struct osmo_fsm nm_gprs_nse_fsm;
+
+/* GPRS NSVC */
+enum nm_gprs_nsvc_op_fsm_states {
+	NM_GPRS_NSVC_ST_OP_DISABLED_NOTINSTALLED,
+	NM_GPRS_NSVC_ST_OP_DISABLED_DEPENDENCY,
+	NM_GPRS_NSVC_ST_OP_DISABLED_OFFLINE,
+	NM_GPRS_NSVC_ST_OP_ENABLED,
+};
+extern struct osmo_fsm nm_gprs_nsvc_fsm;
+
+/* GPRS CELL */
+enum nm_gprs_cell_op_fsm_states {
+	NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED,
+	NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY,
+	NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE,
+	NM_GPRS_CELL_ST_OP_ENABLED,
+};
+extern struct osmo_fsm nm_gprs_cell_fsm;

include/osmo-bts/notification.h

@@ -0,0 +1,61 @@
+/* Maintain and generate ASCI notifications */
+
+/*
+ * (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * SPDX-License-Identifier: AGPL-3.0+
+ *
+ * Author: Harald Welte
+ *
+ * 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
+
+/* one [concurrent] ASCI (VBS/VGCS) notification */
+struct asci_notification {
+	struct llist_head list;	/* linked to bts->asci.notifications */
+
+	/* Group call reference (TS 24.008 10.5.1.9 "Descriptive group or broadcast call reference") */
+	uint8_t group_call_ref[5];
+
+	/* Group Channel Description (TS 44.018 10.5.2.14b) */
+	struct {
+		bool present;
+		uint8_t value[255];
+		uint8_t len;
+	} chan_desc;
+
+	/* NCH DRX Information (TS 48.058 9.3.47) */
+	struct {
+		bool present;
+		struct rsl_ie_nch_drx_info value;
+	} nch_drx_info;
+};
+
+int bts_asci_notification_add(struct gsm_bts *bts, const uint8_t *group_call_ref, const uint8_t *chan_desc,
+			      uint8_t chan_desc_len, const struct rsl_ie_nch_drx_info *nch_drx_info);
+
+int bts_asci_notification_del(struct gsm_bts *bts, const uint8_t *group_call_ref);
+
+int bts_asci_notification_reset(struct gsm_bts *bts);
+
+const struct asci_notification *bts_asci_notification_get_next(struct gsm_bts *bts);
+
+void append_group_call_information(struct bitvec *bv, const uint8_t *gcr, const uint8_t *ch_desc, uint8_t ch_desc_len);
+
+int bts_asci_notify_nch_gen_msg(struct gsm_bts *bts, uint8_t *out_buf);
+int bts_asci_notify_facch_gen_msg(struct gsm_bts *bts, uint8_t *out_buf, const uint8_t *group_call_ref,
+				  const uint8_t *chan_desc, uint8_t chan_desc_len);

include/osmo-bts/oml.h

@@ -63,11 +63,12 @@ int oml_tx_state_changed(const struct gsm_abis_mo *mo);
 int oml_mo_tx_sw_act_rep(const struct gsm_abis_mo *mo);
 
 int oml_fom_ack_nack(struct msgb *old_msg, uint8_t cause);
+int oml_fom_ack_nack_copy_msg(const struct msgb *old_msg, uint8_t cause);
 
 int oml_mo_fom_ack_nack(const struct gsm_abis_mo *mo, uint8_t orig_msg_type,
 			uint8_t cause);
 
-extern const unsigned int oml_default_t200_ms[7];
+extern const uint32_t oml_default_t200_fn[7];
 
 /* Transmit failure event report */
 int oml_tx_failure_event_rep(const struct gsm_abis_mo *mo, enum abis_nm_severity severity,
@@ -77,11 +78,11 @@ void gsm_mo_init(struct gsm_abis_mo *mo, struct gsm_bts *bts,
 		 uint8_t obj_class, uint8_t p1, uint8_t p2, uint8_t p3);
 
 struct gsm_abis_mo *gsm_objclass2mo(struct gsm_bts *bts, uint8_t obj_class,
-				    const struct abis_om_obj_inst *obj_inst);
+				    const struct abis_om_obj_inst *obj_inst,
+				    enum abis_nm_nack_cause *c);
 
-struct gsm_nm_state *gsm_objclass2nmstate(struct gsm_bts *bts, uint8_t obj_class,
-					  const struct abis_om_obj_inst *obj_inst);
 void *gsm_objclass2obj(struct gsm_bts *bts, uint8_t obj_class,
-		       const struct abis_om_obj_inst *obj_inst);
+		       const struct abis_om_obj_inst *obj_inst,
+		       enum abis_nm_nack_cause *c);
 
 #endif // _OML_H */

include/osmo-bts/osmux.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <osmocom/core/select.h>
+#include <osmocom/netif/osmux.h>
+
+struct gsm_bts;
+struct gsm_lchan;
+
+enum osmux_usage {
+	OSMUX_USAGE_OFF = 0,
+	OSMUX_USAGE_ON = 1,
+	OSMUX_USAGE_ONLY = 2,
+};
+
+struct osmux_state {
+	enum osmux_usage use;
+	char *local_addr;
+	uint16_t local_port;
+	struct osmo_fd fd;
+	uint8_t batch_factor;
+	unsigned int batch_size;
+	bool dummy_padding;
+	struct llist_head osmux_handle_list;
+};
+
+/* Contains a "struct osmux_in_handle" towards a specific peer (remote IPaddr+port) */
+struct osmux_handle {
+	struct llist_head head;
+	struct gsm_bts *bts;
+	struct osmux_in_handle *in;
+	struct osmo_sockaddr rem_addr;
+	int refcnt;
+};
+
+int bts_osmux_init(struct gsm_bts *bts);
+void bts_osmux_release(struct gsm_bts *bts);
+int bts_osmux_open(struct gsm_bts *bts);
+
+int lchan_osmux_init(struct gsm_lchan *lchan, uint8_t rtp_payload);
+void lchan_osmux_release(struct gsm_lchan *lchan);
+int lchan_osmux_connect(struct gsm_lchan *lchan);
+bool lchan_osmux_connected(const struct gsm_lchan *lchan);
+int lchan_osmux_send_frame(struct gsm_lchan *lchan, const uint8_t *payload,
+			   unsigned int payload_len, unsigned int duration, bool marker);
+
+int lchan_osmux_skipped_frame(struct gsm_lchan *lchan, unsigned int duration);

include/osmo-bts/paging.h

@@ -7,6 +7,55 @@
 
 struct paging_state;
 struct gsm_bts;
+struct asci_notification;
+
+/* abstract representation of P1 rest octets; we only implement those parts we need for now */
+struct p1_rest_octets {
+	struct {
+		bool present;
+		uint8_t nln;
+		uint8_t nln_status;
+	} nln_pch;
+	bool packet_page_ind[2];
+	bool r8_present;
+	struct {
+		bool prio_ul_access;
+		bool etws_present;
+		struct {
+			bool is_first;
+			uint8_t page_nr;
+			const uint8_t *page;
+			size_t page_bytes;
+		} etws;
+	} r8;
+};
+
+/* abstract representation of P2 rest octets; we only implement those parts we need for now */
+struct p2_rest_octets {
+	struct {
+		bool present;
+		uint8_t cn3;
+	} cneed;
+	struct {
+		bool present;
+		uint8_t nln;
+		uint8_t nln_status;
+	} nln_pch;
+};
+
+/* abstract representation of P3 rest octets; we only implement those parts we need for now */
+struct p3_rest_octets {
+	struct {
+		bool present;
+		uint8_t cn3;
+		uint8_t cn4;
+	} cneed;
+	struct {
+		bool present;
+		uint8_t nln;
+		uint8_t nln_status;
+	} nln_pch;
+};
 
 /* initialize paging code */
 struct paging_state *paging_init(struct gsm_bts *bts,
@@ -35,9 +84,15 @@ int paging_si_update(struct paging_state *ps, struct gsm48_control_channel_descr
 int paging_add_identity(struct paging_state *ps, uint8_t paging_group,
 			const uint8_t *identity_lv, uint8_t chan_needed);
 
-/* Add an IMM.ASS message to the paging queue */
-int paging_add_imm_ass(struct paging_state *ps, const uint8_t *data,
-                       uint8_t len, bool from_pcu);
+/* Add a ready formatted MAC block message to the paging queue, this can be an IMMEDIATE ASSIGNMENT, or a
+ * PAGING COMMAND (from the PCU) */
+int paging_add_macblock(struct paging_state *ps, uint32_t msg_id, const char *imsi, bool confirm, const uint8_t *macblock);
+
+/* Paging rest octests */
+void append_p1_rest_octets(struct bitvec *bv, const struct p1_rest_octets *p1ro,
+			   const struct asci_notification *notif);
+void append_p2_rest_octets(struct bitvec *bv, const struct p2_rest_octets *p2ro);
+void append_p3_rest_octets(struct bitvec *bv, const struct p3_rest_octets *p3ro);
 
 /* generate paging message for given gsm time */
 int paging_gen_msg(struct paging_state *ps, uint8_t *out_buf, struct gsm_time *gt,

include/osmo-bts/pcu_if.h

@@ -3,9 +3,11 @@
 
 #include <osmo-bts/pcuif_proto.h>
 
+struct gsm_bts_sm;
+
 extern int pcu_direct;
 
-#define PCUIF_HDR_SIZE ( sizeof(struct gsm_pcu_if) - sizeof(((struct gsm_pcu_if *)0)->u) )
+#define PCUIF_HDR_SIZE (sizeof(struct gsm_pcu_if) - sizeof(((struct gsm_pcu_if *)0)->u))
 
 int pcu_tx_info_ind(void);
 int pcu_tx_si(const struct gsm_bts *bts, enum osmo_sysinfo_type si_type, bool enable);
@@ -21,11 +23,11 @@ int pcu_tx_rach_ind(uint8_t bts_nr, uint8_t trx_nr, uint8_t ts_nr,
 int pcu_tx_time_ind(uint32_t fn);
 int pcu_tx_interf_ind(const struct gsm_bts_trx *trx, uint32_t fn);
 int pcu_tx_pag_req(const uint8_t *identity_lv, uint8_t chan_needed);
-int pcu_tx_pch_data_cnf(uint32_t fn, uint8_t *data, uint8_t len);
+int pcu_tx_data_cnf(uint32_t msg_id, uint8_t sapi);
 int pcu_tx_susp_req(struct gsm_lchan *lchan, uint32_t tlli, const uint8_t *ra_id, uint8_t cause);
-int pcu_sock_send(struct gsm_network *net, struct msgb *msg);
+int pcu_sock_send(struct msgb *msg);
 
-int pcu_sock_init(const char *path);
+int pcu_sock_init(const char *path, int qlength_max);
 void pcu_sock_exit(void);
 
 bool pcu_connected(void);

include/osmo-bts/pcuif_proto.h

@@ -3,20 +3,20 @@
 
 #include <osmocom/gsm/l1sap.h>
 #include <arpa/inet.h>
+#include <osmocom/gsm/protocol/gsm_23_003.h>
 
 #define PCU_SOCK_DEFAULT	"/tmp/pcu_bts"
 
-#define PCU_IF_VERSION		0x0a
+#define PCU_IF_VERSION		0x0c
 #define TXT_MAX_LEN	128
 
 /* msg_type */
 #define PCU_IF_MSG_DATA_REQ	0x00	/* send data to given channel */
-#define PCU_IF_MSG_DATA_CNF	0x01	/* confirm (e.g. transmission on PCH) */
 #define PCU_IF_MSG_DATA_IND	0x02	/* receive data from given channel */
 #define PCU_IF_MSG_SUSP_REQ	0x03	/* BTS forwards GPRS SUSP REQ to PCU */
 #define PCU_IF_MSG_APP_INFO_REQ	0x04	/* BTS asks PCU to transmit APP INFO via PACCH */
 #define PCU_IF_MSG_RTS_REQ	0x10	/* ready to send request */
-#define PCU_IF_MSG_DATA_CNF_DT	0x11	/* confirm (with direct tlli) */
+#define PCU_IF_MSG_DATA_CNF_2	0x11	/* confirm (using message id) */
 #define PCU_IF_MSG_RACH_IND	0x22	/* receive RACH */
 #define PCU_IF_MSG_INFO_IND	0x32	/* retrieve BTS info */
 #define PCU_IF_MSG_ACT_REQ	0x40	/* activate/deactivate PDCH */
@@ -28,17 +28,16 @@
 
 /* sapi */
 #define PCU_IF_SAPI_RACH	0x01	/* channel request on CCCH */
-#define PCU_IF_SAPI_AGCH	0x02	/* assignment on AGCH */
-#define PCU_IF_SAPI_PCH		0x03	/* paging/assignment on PCH */
 #define PCU_IF_SAPI_BCCH	0x04	/* SI on BCCH */
 #define PCU_IF_SAPI_PDTCH	0x05	/* packet data/control/ccch block */
 #define PCU_IF_SAPI_PRACH	0x06	/* packet random access channel */
 #define PCU_IF_SAPI_PTCCH	0x07	/* packet TA control channel */
-#define PCU_IF_SAPI_AGCH_DT	0x08	/* assignment on AGCH but with additional TLLI */
+#define PCU_IF_SAPI_PCH_2	0x08	/* assignment on PCH (confirmed using message id) */
+#define PCU_IF_SAPI_AGCH_2	0x09	/* assignment on AGCH (confirmed using message id) */
 
 /* flags */
 #define PCU_IF_FLAG_ACTIVE	(1 << 0)/* BTS is active */
-#define PCU_IF_FLAG_SYSMO	(1 << 1)/* access PDCH of sysmoBTS directly */
+#define PCU_IF_FLAG_DIRECT_PHY	(1 << 1)/* access PHY directly via dedicated hardware support */
 #define PCU_IF_FLAG_CS1		(1 << 16)
 #define PCU_IF_FLAG_CS2		(1 << 17)
 #define PCU_IF_FLAG_CS3		(1 << 18)
@@ -58,6 +57,20 @@
 #define PCU_IF_ADDR_TYPE_IPV4	0x04	/* IPv4 address */
 #define PCU_IF_ADDR_TYPE_IPV6	0x29	/* IPv6 address */
 
+/* BTS model */
+enum gsm_pcuif_bts_model {
+	PCU_IF_BTS_MODEL_UNSPEC,
+	PCU_IF_BTS_MODEL_LC15,
+	PCU_IF_BTS_MODEL_OC2G,
+	PCU_IF_BTS_MODEL_OCTPHY,
+	PCU_IF_BTS_MODEL_SYSMO,
+	PCU_IF_BTS_MODEL_TRX,
+	PCU_IF_BTS_MODEL_RBS,
+};
+
+#define PCU_IF_NUM_NSVC 2
+#define PCU_IF_NUM_TRX 8
+
 enum gsm_pcu_if_text_type {
 	PCU_VERSION,
 	PCU_OML_ALERT,
@@ -83,19 +96,10 @@ struct gsm_pcu_if_data {
 	int16_t		lqual_cb;	/* !< \brief Link quality in centiBel */
 } __attribute__ ((packed));
 
-/* data confirmation with direct tlli (instead of raw mac block with tlli) */
-struct gsm_pcu_if_data_cnf_dt {
+/* data confirmation with message id (instead of raw mac block) */
+struct gsm_pcu_if_data_cnf {
 	uint8_t		sapi;
-	uint32_t	tlli;
-	uint32_t	fn;
-	uint16_t	arfcn;
-	uint8_t		trx_nr;
-	uint8_t		ts_nr;
-	uint8_t		block_nr;
-	int8_t		rssi;
-	uint16_t	ber10k;		/* !< \brief BER in units of 0.01% */
-	int16_t		ta_offs_qbits;	/* !< \brief Burst TA Offset in quarter bits */
-	int16_t		lqual_cb;	/* !< \brief Link quality in centiBel */
+	uint32_t	msg_id;
 } __attribute__ ((packed));
 
 struct gsm_pcu_if_rts_req {
@@ -140,7 +144,7 @@ struct gsm_pcu_if_info_trx {
 struct gsm_pcu_if_info_ind {
 	uint32_t	version;
 	uint32_t	flags;
-	struct gsm_pcu_if_info_trx trx[8];	/* TRX infos per BTS */
+	struct gsm_pcu_if_info_trx trx[PCU_IF_NUM_TRX];	/* TRX infos per BTS */
 	uint8_t		bsic;
 	/* RAI */
 	uint16_t	mcc, mnc;
@@ -169,14 +173,15 @@ struct gsm_pcu_if_info_ind {
 	uint8_t		initial_cs;
 	uint8_t		initial_mcs;
 	/* NSVC */
-	uint16_t	nsvci[2];
-	uint16_t	local_port[2];
-	uint16_t	remote_port[2];
-	uint8_t		address_type[2];
+	uint16_t	nsvci[PCU_IF_NUM_NSVC];
+	uint16_t	local_port[PCU_IF_NUM_NSVC];
+	uint16_t	remote_port[PCU_IF_NUM_NSVC];
+	uint8_t		address_type[PCU_IF_NUM_NSVC];
 	union {
 		struct in_addr v4;
 		struct in6_addr v6;
-	} remote_ip[2];
+	} remote_ip[PCU_IF_NUM_NSVC];
+	uint8_t		bts_model; /* enum gsm_pcuif_bts_model */
 } __attribute__ ((packed));
 
 struct gsm_pcu_if_act_req {
@@ -226,6 +231,32 @@ struct gsm_pcu_if_container {
 	uint8_t		data[0];
 } __attribute__ ((packed));
 
+/* Struct to send a (confirmed) IMMEDIATE ASSIGNMENT message via PCH. The struct is sent as a data request
+ * (data_req) under SAPI PCU_IF_SAPI_PCH_2. */
+struct gsm_pcu_if_pch {
+	/* message id as reference for confirmation */
+	uint32_t msg_id;
+	/* IMSI (to derive paging group) */
+	char imsi[OSMO_IMSI_BUF_SIZE];
+	/* GSM mac-block (with immediate assignment message) */
+	uint8_t data[GSM_MACBLOCK_LEN];
+	/* Set to true in case the receiving end must send a confirmation
+	 * when the MAC block (data) has been sent. */
+	bool confirm;
+} __attribute__((packed));
+
+/* Struct to send a (confirmed) IMMEDIATE ASSIGNMENT message via AGCH. The struct is sent as a data request
+ * (data_req) under SAPI PCU_IF_SAPI_AGCH_2. */
+struct gsm_pcu_if_agch {
+	/* message id as reference for confirmation */
+	uint32_t msg_id;
+	/* GSM mac-block (with immediate assignment message) */
+	uint8_t data[GSM_MACBLOCK_LEN];
+	/* Set to true in case the receiving end must send a confirmation
+	 * when the MAC block (data) has been sent. */
+	bool confirm;
+} __attribute__((packed));
+
 struct gsm_pcu_if {
 	/* context based information */
 	uint8_t		msg_type;	/* message type */
@@ -234,8 +265,7 @@ struct gsm_pcu_if {
 
 	union {
 		struct gsm_pcu_if_data		data_req;
-		struct gsm_pcu_if_data		data_cnf;
-		struct gsm_pcu_if_data_cnf_dt	data_cnf_dt;
+		struct gsm_pcu_if_data_cnf	data_cnf2;
 		struct gsm_pcu_if_data		data_ind;
 		struct gsm_pcu_if_susp_req	susp_req;
 		struct gsm_pcu_if_rts_req	rts_req;

include/osmo-bts/rsl.h

@@ -4,7 +4,8 @@
 #define LCHAN_FN_DUMMY 0xFFFFFFFF
 #define LCHAN_FN_WAIT 0xFFFFFFFE
 
-int msgb_queue_flush(struct llist_head *list);
+bool rsl_chan_rt_is_asci(enum rsl_cmod_crt chan_rt);
+bool rsl_chan_rt_is_vgcs(enum rsl_cmod_crt chan_rt);
 
 int down_rsl(struct gsm_bts_trx *trx, struct msgb *msg);
 int rsl_tx_rf_res(struct gsm_bts_trx *trx);
@@ -16,6 +17,8 @@ int rsl_tx_chan_act_acknack(struct gsm_lchan *lchan, uint8_t cause);
 int rsl_tx_conn_fail(const struct gsm_lchan *lchan, uint8_t cause);
 int rsl_tx_rf_rel_ack(struct gsm_lchan *lchan);
 int rsl_tx_hando_det(struct gsm_lchan *lchan, uint8_t *ho_delay);
+int rsl_tx_listener_det(struct gsm_lchan *lchan, uint8_t *acc_delay);
+int rsl_tx_talker_det(struct gsm_lchan *lchan, uint8_t *acc_delay);
 
 /* call-back for LAPDm code, called when it wants to send msgs UP */
 int lapdm_rll_tx_cb(struct msgb *msg, struct lapdm_entity *le, void *ctx);
@@ -32,6 +35,6 @@ void ipacc_dyn_pdch_complete(struct gsm_bts_trx_ts *ts, int rc);
 
 int rsl_tx_cbch_load_indication(struct gsm_bts *bts, bool ext_cbch, bool overflow, uint8_t amount);
 
-int rsl_tx_meas_res(struct gsm_lchan *lchan, const uint8_t *l3, int l3_len, int timing_offset);
+int rsl_tx_meas_res(struct gsm_lchan *lchan, const uint8_t *l3, unsigned int l3_len, int timing_offset);
 
 #endif // _RSL_H */

include/osmo-bts/rtp_input_preen.h

@@ -0,0 +1,20 @@
+/*
+ * RTP input validation function: makes the accept-or-drop decision,
+ * and for some codecs signals additional required actions such as
+ * dropping one header octet.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <osmo-bts/lchan.h>
+
+enum pl_input_decision {
+	PL_DECISION_DROP,
+	PL_DECISION_ACCEPT,
+	PL_DECISION_STRIP_HDR_OCTET,
+};
+
+enum pl_input_decision
+rtp_payload_input_preen(struct gsm_lchan *lchan, const uint8_t *rtp_pl,
+			unsigned rtp_pl_len, bool *rfc5993_sid_flag);

include/osmo-bts/scheduler.h

@@ -5,13 +5,6 @@
 
 #include <osmo-bts/gsm_data.h>
 
-/* Whether a logical channel must be activated automatically */
-#define TRX_CHAN_FLAG_AUTO_ACTIVE	(1 << 0)
-
-/* FIXME: we should actually activate 'auto-active' channels */
-#define TRX_CHAN_IS_ACTIVE(state, chan) \
-	(trx_chan_desc[chan].flags & TRX_CHAN_FLAG_AUTO_ACTIVE || (state)->active)
-
 #define TRX_GMSK_NB_TSC(br) \
 	_sched_train_seq_gmsk_nb[(br)->tsc_set][(br)->tsc]
 
@@ -97,10 +90,10 @@ struct l1sched_chan_state {
 	bool			active;		/* Channel is active */
 	ubit_t			*dl_bursts;	/* burst buffer for TX */
 	enum trx_mod_type	dl_mod_type;	/* Downlink modulation type */
+	uint8_t			dl_mask;	/* mask of transmitted bursts */
 	sbit_t			*ul_bursts;	/* burst buffer for RX */
-	sbit_t			*ul_bursts_prev;/* previous burst buffer for RX (repeated SACCH) */
 	uint32_t		ul_first_fn;	/* fn of first burst */
-	uint8_t			ul_mask;	/* mask of received bursts */
+	uint32_t		ul_mask;	/* mask of received bursts */
 
 	/* loss detection */
 	uint32_t		last_tdma_fn;	/* last processed TDMA frame number */
@@ -119,7 +112,6 @@ struct l1sched_chan_state {
 	uint8_t			dl_ft;		/* current downlink FT index */
 	uint8_t			ul_cmr;		/* current uplink CMR index */
 	uint8_t			dl_cmr;		/* current downlink CMR index */
-	uint8_t			amr_loop;	/* if AMR loop is enabled */
 	uint8_t			amr_last_dtx;	/* last received dtx frame type */
 
 	/* TCH/H */
@@ -139,7 +131,7 @@ struct l1sched_chan_state {
 	/* Uplink measurements */
 	struct {
 		/* Active channel measurements (simple ring buffer) */
-		struct l1sched_meas_set buf[8]; /* up to 8 entries */
+		struct l1sched_meas_set buf[24]; /* up to 24 (BUFMAX) entries */
 		unsigned int current; /* current position */
 
 		/* Interference measurements */
@@ -193,6 +185,12 @@ int trx_sched_set_pchan(struct gsm_bts_trx_ts *ts, enum gsm_phys_chan_config pch
 /*! \brief set all matching logical channels active/inactive */
 int trx_sched_set_lchan(struct gsm_lchan *lchan, uint8_t chan_nr, uint8_t link_id, bool active);
 
+/*! \brief set uplink access on given logical channels active/inactive */
+int trx_sched_set_ul_access(struct gsm_lchan *lchan, uint8_t chan_nr, bool active);
+
+/*! \brief set all logical channels of BCCH/CCCH active/inactive */
+int trx_sched_set_bcch_ccch(struct gsm_lchan *lchan, bool active);
+
 /*! \brief set mode of all matching logical channels to given mode(s) */
 int trx_sched_set_mode(struct gsm_bts_trx_ts *ts, uint8_t chan_nr, uint8_t rsl_cmode,
 	uint8_t tch_mode, int codecs, uint8_t codec0, uint8_t codec1,
@@ -241,6 +239,7 @@ extern const struct trx_sched_multiframe trx_sched_multiframes[];
 #define TRX_BI_F_TRX_NUM	(1 << 4)
 #define TRX_BI_F_BATCH_IND	(1 << 5)
 #define TRX_BI_F_SHADOW_IND	(1 << 6)
+#define TRX_BI_F_ACCESS_BURST	(1 << 7)
 
 /*! UL burst indication with the corresponding meta info */
 struct trx_ul_burst_ind {
@@ -304,6 +303,10 @@ int trx_sched_ul_burst(struct l1sched_ts *l1ts, struct trx_ul_burst_ind *bi);
 
 /* Averaging mode for trx_sched_meas_avg() */
 enum sched_meas_avg_mode {
+	/* first 22 of last 24 bursts (for TCH/F14.4, TCH/F9.6, TCH/F4.8) */
+	SCHED_MEAS_AVG_M_S24N22,
+	/* last 22 bursts (for TCH/H4.8, TCH/H2.4) */
+	SCHED_MEAS_AVG_M_S22N22,
 	/* last 4 bursts (default for xCCH, PTCCH and PDTCH) */
 	SCHED_MEAS_AVG_M_S4N4,
 	/* last 8 bursts (default for TCH/F and FACCH/F) */

include/osmo-bts/scheduler_backend.h

@@ -42,16 +42,18 @@ extern const ubit_t _sched_train_seq_gmsk_sb[64];
 struct msgb *_sched_dequeue_prim(struct l1sched_ts *l1ts, const struct trx_dl_burst_req *br);
 
 int _sched_compose_ph_data_ind(struct l1sched_ts *l1ts, uint32_t fn,
-			       enum trx_chan_type chan, uint8_t *l2,
-			       uint8_t l2_len, float rssi,
+			       enum trx_chan_type chan,
+			       const uint8_t *data, size_t data_len,
+			       uint16_t ber10k, float rssi,
 			       int16_t ta_offs_256bits, int16_t link_qual_cb,
-			       uint16_t ber10k,
 			       enum osmo_ph_pres_info_type presence_info);
 
 int _sched_compose_tch_ind(struct l1sched_ts *l1ts, uint32_t fn,
-			   enum trx_chan_type chan, uint8_t *tch, uint8_t tch_len,
-			   int16_t ta_offs_256bits, uint16_t ber10k, float rssi,
-			   int16_t link_qual_cb, uint8_t is_sub);
+			   enum trx_chan_type chan,
+			   const uint8_t *data, size_t data_len,
+			   uint16_t ber10k, float rssi,
+			   int16_t ta_offs_256bits, int16_t link_qual_cb,
+			   uint8_t is_sub);
 
 int tx_fcch_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br);
 int tx_sch_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br);

include/osmo-bts/tx_power.h

@@ -77,7 +77,12 @@ int get_p_trxout_target_mdBm_lchan(const struct gsm_lchan *lchan);
 int get_p_trxout_actual_mdBm(const struct gsm_bts_trx *trx, uint8_t bs_power_red);
 int get_p_trxout_actual_mdBm_lchan(const struct gsm_lchan *lchan);
 
-int power_ramp_start(struct gsm_bts_trx *trx, int p_total_tgt_mdBm, int bypass, ramp_compl_cb_t ramp_compl_cb);
+int _power_ramp_start(struct gsm_bts_trx *trx, int p_total_tgt_mdBm, int bypass_max_power, ramp_compl_cb_t ramp_compl_cb, bool skip_ramping);
+#define power_ramp_start(trx, p_total_tgt_mdBm, bypass_max_power, ramp_compl_cb) \
+	_power_ramp_start(trx, p_total_tgt_mdBm, bypass_max_power, ramp_compl_cb, false)
+#define power_ramp_force(trx, p_total_tgt_mdBm, bypass_max_power, ramp_compl_cb) \
+	_power_ramp_start(trx, p_total_tgt_mdBm, bypass_max_power, ramp_compl_cb, true)
+
 void power_ramp_abort(struct gsm_bts_trx *trx);
 
 void power_trx_change_compl(struct gsm_bts_trx *trx, int p_trxout_cur_mdBm);

include/osmo-bts/vty.h

@@ -12,6 +12,7 @@ enum bts_vty_node {
 	PHY_INST_NODE,
 	BTS_NODE,
 	TRX_NODE,
+	OSMUX_NODE,
 };
 
 extern struct cmd_element cfg_bts_auto_band_cmd;
@@ -20,12 +21,9 @@ extern struct cmd_element cfg_bts_no_auto_band_cmd;
 struct phy_instance *vty_get_phy_instance(struct vty *vty, int phy_nr, int inst_nr);
 
 int bts_vty_go_parent(struct vty *vty);
-int bts_vty_is_config_node(struct vty *vty, int node);
 
 int bts_vty_init(void *ctx);
 
-struct gsm_network *gsmnet_from_vty(struct vty *v);
-
 extern struct vty_app_info bts_vty_info;
 extern struct gsm_bts *g_bts;
 

src/common/Makefile.am

@@ -9,12 +9,14 @@ AM_CFLAGS = \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOTRAU_CFLAGS) \
 	$(LIBOSMOCODEC_CFLAGS) \
+	$(LIBOSMONETIF_CFLAGS) \
 	$(NULL)
 
 LDADD = \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOTRAU_LIBS) \
 	$(LIBOSMOCODEC_LIBS) \
+	$(LIBOSMONETIF_LIBS) \
 	$(NULL)
 
 if ENABLE_LC15BTS
@@ -29,13 +31,17 @@ libbts_a_SOURCES = \
 	abis.c \
 	abis_osmo.c \
 	oml.c \
+	osmux.c \
 	bts.c \
+	bts_sm.c \
 	bts_trx.c \
 	rsl.c \
+	rtp_input_preen.c \
 	vty.c \
 	paging.c \
 	measurement.c \
 	amr.c \
+	asci.c \
 	lchan.c \
 	load_indication.c \
 	pcu_sock.c \
@@ -45,6 +51,8 @@ libbts_a_SOURCES = \
 	bts_ctrl_commands.c \
 	bts_ctrl_lookup.c \
 	bts_shutdown_fsm.c \
+	csd_rlp.c \
+	csd_v110.c \
 	l1sap.c \
 	cbch.c \
 	power_control.c \
@@ -58,7 +66,11 @@ libbts_a_SOURCES = \
 	nm_bts_fsm.c \
 	nm_bb_transc_fsm.c \
 	nm_channel_fsm.c \
+	nm_gprs_cell_fsm.c \
+	nm_gprs_nse_fsm.c \
+	nm_gprs_nsvc_fsm.c \
 	nm_radio_carrier_fsm.c \
+	notification.c \
 	probes.d \
 	$(NULL)
 

src/common/abis.c

@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -39,10 +39,10 @@
 #include <osmocom/core/signal.h>
 #include <osmocom/core/macaddr.h>
 #include <osmocom/core/fsm.h>
+#include <osmocom/gsm/protocol/ipaccess.h>
+#include <osmocom/gsm/ipa.h>
 #include <osmocom/abis/abis.h>
 #include <osmocom/abis/e1_input.h>
-#include <osmocom/abis/ipaccess.h>
-#include <osmocom/gsm/ipa.h>
 
 #include <osmo-bts/abis.h>
 #include <osmo-bts/logging.h>
@@ -87,10 +87,17 @@ struct abis_link_fsm_priv {
 
 static void reset_oml_link(struct gsm_bts *bts)
 {
+	struct e1inp_sign_link *link;
+
 	if (bts->oml_link) {
 		struct timespec now;
 
-		e1inp_sign_link_destroy(bts->oml_link);
+		/* Mark bts->oml_link ptr null before calling sign_link_destroy,
+		 * to avoid a callback triggering this same code path. */
+		link = bts->oml_link;
+		bts->oml_link = NULL;
+
+		e1inp_sign_link_destroy(link);
 
 		/* Log a special notice if the OML connection was dropped relatively quickly. */
 		if (bts->oml_conn_established_timestamp.tv_sec != 0 && clock_gettime(CLOCK_MONOTONIC, &now) == 0 &&
@@ -100,14 +107,16 @@ static void reset_oml_link(struct gsm_bts *bts)
 			     "A common error is a mismatch between unit_id configuration parameters of BTS and BSC.\n",
 			     (uint64_t) (now.tv_sec - bts->oml_conn_established_timestamp.tv_sec));
 		}
-		bts->oml_link = NULL;
 	}
 	memset(&bts->oml_conn_established_timestamp, 0, sizeof(bts->oml_conn_established_timestamp));
 
 	/* Same for IPAC_PROTO_OSMO on the same ipa connection: */
 	if (bts->osmo_link) {
-		e1inp_sign_link_destroy(bts->osmo_link);
+		/* Mark bts->osmo_link ptr null before calling sign_link_destroy,
+		 * to avoid a callback triggering this same code path. */
+		link = bts->osmo_link;
 		bts->osmo_link = NULL;
+		e1inp_sign_link_destroy(link);
 	}
 
 }
@@ -225,11 +234,22 @@ static void abis_link_connected(struct osmo_fsm_inst *fi, uint32_t event, void *
 
 	/* Then iterate over the RSL signalling links */
 	llist_for_each_entry(trx, &bts->trx_list, list) {
-		if (trx->rsl_link) {
-			e1inp_sign_link_destroy(trx->rsl_link);
-			trx->rsl_link = NULL;
+		if (trx->bb_transc.rsl.link) {
+			/* Mark link ptr null before calling sign_link_destroy,
+			 * to avoid a callback triggering this same code path. */
+			struct e1inp_sign_link *link = trx->bb_transc.rsl.link;
+			trx->bb_transc.rsl.link = NULL;
+			e1inp_sign_link_destroy(link);
 			if (trx == trx->bts->c0)
 				load_timer_stop(trx->bts);
+		} else {
+			/* If we have no rsl_link yet it may mean that lower
+			 * layers are still establishing the socket (TCP, IPA).
+			 * Let's tell it to stop connection establishment since
+			 * we are shutting down. */
+			struct e1inp_line *line = e1inp_line_find(0);
+			if (line)
+				e1inp_ipa_bts_rsl_close_n(line, trx->nr);
 		}
 		/* Note: Here we could send NM_EV_RSL_DOWN to each
 		 * trx->(bb_transc.)mo.fi, but we are starting shutdown of the
@@ -356,7 +376,7 @@ int abis_bts_rsl_sendmsg(struct msgb *msg)
 
 	/* osmo-bts uses msg->trx internally, but libosmo-abis uses
 	 * the signalling link at msg->dst */
-	msg->dst = msg->trx->rsl_link;
+	msg->dst = msg->trx->bb_transc.rsl.link;
 	return abis_sendmsg(msg);
 }
 
@@ -396,10 +416,10 @@ static struct e1inp_sign_link *sign_link_up(void *unit, struct e1inp_line *line,
 			break;
 		}
 		e1inp_ts_config_sign(sign_ts, line);
-		trx->rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
-						       trx, trx->rsl_tei, 0);
+		trx->bb_transc.rsl.link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+								 trx, trx->bb_transc.rsl.tei, 0);
 		trx_link_estab(trx);
-		return trx->rsl_link;
+		return trx->bb_transc.rsl.link;
 	}
 	return NULL;
 }
@@ -468,8 +488,11 @@ static int inp_s_cbfn(unsigned int subsys, unsigned int signal,
 		return 0;
 
 	struct input_signal_data *isd = signal_data;
-	DEBUGP(DABIS, "Input Signal %s received for link_type=%s\n",
-	       get_value_string(e1inp_signal_names, signal), e1inp_signtype_name(isd->link_type));
+	DEBUGP(DABIS, "Input Signal %s received for ts-%u-%u link_type=%s\n",
+	       get_value_string(e1inp_signal_names, signal),
+	       isd->line ? isd->line->num : -1,
+	       isd->ts_nr,
+	       e1inp_signtype_name(isd->link_type));
 
 	return 0;
 }

src/common/abis_osmo.c

@@ -1,6 +1,6 @@
 /* OSMO extenion link associated to same line as oml_link: */
 
-/* (C) 2021 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+/* (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
  * Author: Pau Espin Pedrol <pespin@sysmocom.de>
  *
  * All Rights Reserved
@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -30,8 +30,7 @@
 #include <osmo-bts/logging.h>
 #include <osmo-bts/pcu_if.h>
 #include <osmo-bts/pcuif_proto.h>
-
-extern struct gsm_network bts_gsmnet;
+#include <osmo-bts/bts_sm.h>
 
 #define OM_HEADROOM_SIZE	128
 
@@ -106,7 +105,7 @@ static int rx_down_osmo_pcu(struct gsm_bts *bts, struct msgb *msg)
 	/* Trim Abis lower layers: */
 	msgb_pull_to_l2(msg);
 	/* we simply forward it to PCUIF: */
-	return pcu_sock_send(&bts_gsmnet, msg);
+	return pcu_sock_send(msg);
 }
 
 /* incoming IPA/OSMO extension Abis message from BSC */

src/common/asci.c

@@ -0,0 +1,211 @@
+/* ASCI (VGCS/VBS) related common code */
+
+/* (C) 2023 by Harald Welte <laforge@osmocom.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 <stdlib.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <osmocom/gsm/protocol/gsm_04_08.h>
+#include <osmocom/gsm/rsl.h>
+
+#include <osmo-bts/bts.h>
+#include <osmo-bts/bts_model.h>
+#include <osmo-bts/rsl.h>
+#include <osmo-bts/logging.h>
+#include <osmo-bts/l1sap.h>
+#include <osmo-bts/asci.h>
+
+static int tx_vgcs_ul_grant(struct gsm_lchan *lchan)
+{
+	struct gsm0408_vgcs_ul_grant ul_grant;
+	struct gsm_time gt;
+	struct msgb *msg;
+
+	gsm_fn2gsmtime(&gt, lchan->asci.fn);
+
+	/* build the RR VGCS UPLINK GRANT message as per TS 44.018 Section 9.1.49 */
+	ul_grant = (struct gsm0408_vgcs_ul_grant) {
+		.hdr = {
+			.proto_discr = GSM48_PDISC_RR,
+			.msg_type = GSM48_MT_RR_VGCS_UPL_GRANT,
+		},
+		.req_ref = {
+			.ra = lchan->asci.ref,
+			.t1 = gt.t1,
+			.t2 = gt.t2,
+			.t3_low = gt.t3 & 7,
+			.t3_high = gt.t3 >> 3,
+		},
+		.ta = lchan->ta_ctrl.current,
+	};
+
+	/* Wrap it in a RSL UNITDATA REQUEST */
+	msg = rsl_rll_simple(RSL_MT_UNIT_DATA_REQ, gsm_lchan2chan_nr(lchan), 0x00, 0);
+	msg->l3h = msg->tail; /* emulate rsl_rx_rll() behaviour */
+	msgb_tl16v_put(msg, RSL_IE_L3_INFO, sizeof(ul_grant), (uint8_t *) &ul_grant);
+
+	/* send it towards MS, just like a RSL message from the BSC */
+	return lapdm_rslms_recvmsg(msg, &lchan->lapdm_ch);
+}
+
+/* timer call-back for T3115 (VGCS UPLINK GRANT re-transmit) */
+static void vgcs_t3115_cb(void *data)
+{
+	struct gsm_lchan *lchan = data;
+	struct gsm_bts *bts = lchan->ts->trx->bts;
+
+	LOGPLCHAN(lchan, DASCI, LOGL_INFO, "T3115 timeout (%d resends left)\n",
+		  bts->ny2 - lchan->asci.vgcs_ul_grant_count);
+
+	if (lchan->state != LCHAN_S_ACTIVE) {
+		LOGPLCHAN(lchan, DASCI, LOGL_NOTICE, "is not active. It is in state %s. Ignoring\n",
+			  gsm_lchans_name(lchan->state));
+		return;
+	}
+
+	if (lchan->asci.vgcs_ul_grant_count >= bts->ny2) {
+		lchan->asci.vgcs_ul_grant_count = 0;
+		LOGPLCHAN(lchan, DASCI, LOGL_NOTICE, "NY2 reached, sending CONNection FAILure to BSC.\n");
+		rsl_tx_conn_fail(lchan, RSL_ERR_TALKER_ACC_FAIL);
+		lchan->asci.talker_active = VGCS_TALKER_NONE;
+		return;
+	}
+
+	tx_vgcs_ul_grant(lchan);
+	lchan->asci.vgcs_ul_grant_count++;
+	osmo_timer_schedule(&lchan->asci.t3115, 0, bts->t3115_ms * 1000);
+}
+
+/* Received random access on dedicated channel. */
+void vgcs_rach(struct gsm_lchan *lchan, uint8_t ra, uint8_t acc_delay, uint32_t fn)
+{
+	LOGPLCHAN(lchan, DASCI, LOGL_NOTICE, "VGCS RACH on dedicated channel type %s received with "
+		  "TA=%u, ref=%u\n", gsm_lchant_name(lchan->type), acc_delay, ra);
+
+	if (ra == 0x25) { /* See TS 44.018 Table 9.1.45.1 */
+		/* Listener Detection (TS 48.058 Section 4.14) */
+		if (!lchan->asci.listener_detected) {
+			rsl_tx_listener_det(lchan, &acc_delay);
+			lchan->asci.listener_detected = true;
+		}
+	} else {
+		/* Talker Detection (TS 48.058 Section 4.13) */
+		struct gsm_bts *bts = lchan->ts->trx->bts;
+
+		/* Talker detection on group channels only */
+		if (!rsl_chan_rt_is_vgcs(lchan->rsl_chan_rt))
+			return;
+
+		if (lchan->asci.talker_active != VGCS_TALKER_NONE) {
+			LOGPLCHAN(lchan, DASCI, LOGL_DEBUG, "Ignoring RACH, there is an active talker already.\n");
+			return;
+		}
+
+		/* Set timing advance, power level and activate SACCH */
+		lchan->ta_ctrl.current = acc_delay;
+		lchan->ms_power_ctrl.current = lchan->ms_power_ctrl.max;
+		lchan->want_dl_sacch_active = true;
+
+		/* Stop RACH detection, wait for valid frame */
+		lchan->asci.talker_active = VGCS_TALKER_WAIT_FRAME;
+		if (l1sap_uplink_access(lchan, false) != 0) {
+			LOGPLCHAN(lchan, DASCI, LOGL_ERROR, "Failed to deactivate uplink access after TALKER DET.\n");
+			rsl_tx_conn_fail(lchan, RSL_ERR_EQUIPMENT_FAIL);
+			lchan->asci.talker_active = VGCS_TALKER_NONE;
+			return;
+		}
+
+		lchan->asci.ref = ra;
+		lchan->asci.fn = fn;
+
+		/* Send TALKER DETECT via RSL to BSC */
+		rsl_tx_talker_det(lchan, &acc_delay);
+
+		/* Send VGCS UPLINK GRANT */
+		lchan->asci.vgcs_ul_grant_count = 1;
+		tx_vgcs_ul_grant(lchan);
+
+		/* Start T3115 */
+		LOGPLCHAN(lchan, DASCI, LOGL_DEBUG, "Starting T3115 with %u ms\n", bts->t3115_ms);
+		lchan->asci.t3115.cb = vgcs_t3115_cb;
+		lchan->asci.t3115.data = lchan;
+		osmo_timer_schedule(&lchan->asci.t3115, 0, bts->t3115_ms * 1000);
+	}
+}
+
+/* Received channel activation. */
+void vgcs_lchan_activate(struct gsm_lchan *lchan)
+{
+	LOGPLCHAN(lchan, DASCI, LOGL_INFO, "Channel is activated.\n");
+	if (l1sap_uplink_access(lchan, true) != 0) {
+		LOGPLCHAN(lchan, DASCI, LOGL_ERROR, "Failed to activate uplink access after channel activation.\n");
+		rsl_tx_conn_fail(lchan, RSL_ERR_EQUIPMENT_FAIL);
+	}
+}
+
+/* Received channel reactivation. (for assignment) */
+void vgcs_lchan_react(struct gsm_lchan *lchan)
+{
+	LOGPLCHAN(lchan, DASCI, LOGL_INFO, "Channel is activated for assignment.\n");
+	lchan->asci.talker_active = VGCS_TALKER_WAIT_FRAME;
+	if (l1sap_uplink_access(lchan, false) != 0) {
+		LOGPLCHAN(lchan, DASCI, LOGL_ERROR, "Failed to deactivate uplink access for assignment.\n");
+		rsl_tx_conn_fail(lchan, RSL_ERR_EQUIPMENT_FAIL);
+	}
+	radio_link_timeout_reset(lchan);
+}
+
+/* Received first valid data frame on dedicated channel. */
+void vgcs_talker_frame(struct gsm_lchan *lchan)
+{
+	LOGPLCHAN(lchan, DASCI, LOGL_INFO, "First valid frame detected, talker now active.\n");
+	osmo_timer_del(&lchan->asci.t3115);
+	lchan->asci.talker_active = VGCS_TALKER_ACTIVE;
+	radio_link_timeout_reset(lchan);
+}
+
+/* Release VGCS Talker state. */
+void vgcs_talker_reset(struct gsm_lchan *lchan, bool ul_access)
+{
+	if (lchan->asci.talker_active == VGCS_TALKER_NONE)
+		return;
+
+	LOGPLCHAN(lchan, DASCI, LOGL_INFO, "Uplink released, no talker.\n");
+
+	/* Stop T3115 */
+	osmo_timer_del(&lchan->asci.t3115);
+
+	/* Talker released. */
+	lchan->asci.talker_active = VGCS_TALKER_NONE;
+	if (ul_access) {
+		if (l1sap_uplink_access(lchan, true) != 0) {
+			LOGPLCHAN(lchan, DASCI, LOGL_ERROR,
+				  "Failed to activate uplink access after uplink became free.\n");
+			rsl_tx_conn_fail(lchan, RSL_ERR_EQUIPMENT_FAIL);
+		}
+	}
+}
+
+/* Release VGCS Listener state. */
+void vgcs_listener_reset(struct gsm_lchan *lchan)
+{
+	lchan->asci.listener_detected = false;
+}

src/common/bts.c

@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -44,8 +44,10 @@
 #include <osmo-bts/abis.h>
 #include <osmo-bts/bts.h>
 #include <osmo-bts/bts_model.h>
+#include <osmo-bts/bts_sm.h>
 #include <osmo-bts/dtx_dl_amr_fsm.h>
 #include <osmo-bts/pcuif_proto.h>
+#include <osmo-bts/pcu_if.h>
 #include <osmo-bts/rsl.h>
 #include <osmo-bts/oml.h>
 #include <osmo-bts/signal.h>
@@ -54,17 +56,15 @@
 #include <osmo-bts/bts_shutdown_fsm.h>
 #include <osmo-bts/nm_common_fsm.h>
 #include <osmo-bts/power_control.h>
+#include <osmo-bts/osmux.h>
+#include <osmo-bts/notification.h>
 
+#define MAX_TA_DEF	 63 /* default max Timing Advance value */
 #define MIN_QUAL_RACH	 50 /* minimum link quality (in centiBels) for Access Bursts */
 #define MIN_QUAL_NORM	 -5 /* minimum link quality (in centiBels) for Normal Bursts */
 
 static void bts_update_agch_max_queue_length(struct gsm_bts *bts);
 
-struct gsm_network bts_gsmnet = {
-	.bts_list = { &bts_gsmnet.bts_list, &bts_gsmnet.bts_list },
-	.num_bts = 0,
-};
-
 void *tall_bts_ctx;
 
 /* Table 3.1 TS 04.08: Values of parameter S */
@@ -97,12 +97,22 @@ static const struct rate_ctr_desc bts_ctr_desc[] = {
 	[BTS_CTR_RACH_RCVD] =		{"rach:rcvd", "Received RACH requests (Um)"},
 	[BTS_CTR_RACH_DROP] =		{"rach:drop", "Dropped RACH requests (Um)"},
 	[BTS_CTR_RACH_HO] =		{"rach:handover", "Received RACH requests (Handover)"},
+	[BTS_CTR_RACH_VGCS] =		{"rach:vgcs", "Received RACH requests (VGCS)"},
 	[BTS_CTR_RACH_CS] =		{"rach:cs", "Received RACH requests (CS/Abis)"},
 	[BTS_CTR_RACH_PS] =		{"rach:ps", "Received RACH requests (PS/PCU)"},
 
 	[BTS_CTR_AGCH_RCVD] =		{"agch:rcvd", "Received AGCH requests (Abis)"},
 	[BTS_CTR_AGCH_SENT] =		{"agch:sent", "Sent AGCH requests (Abis)"},
 	[BTS_CTR_AGCH_DELETED] =	{"agch:delete", "Sent AGCH DELETE IND (Abis)"},
+
+	[BTS_CTR_RTP_RX_TOTAL] =	{"rtp:rx:total", "Total number of received RTP packets"},
+	[BTS_CTR_RTP_RX_MARKER] =	{"rtp:rx:marker", "Number of received RTP packets with marker bit set"},
+	[BTS_CTR_RTP_RX_DROP_PREEN] =	{"rtp:rx:drop:preen", "Total number of received RTP packets dropped during preening"},
+	[BTS_CTR_RTP_RX_DROP_LOOPBACK] = {"rtp:rx:drop:loopback", "Total number of received RTP packets dropped during loopback"},
+	[BTS_CTR_RTP_RX_DROP_OVERFLOW] = {"rtp:rx:drop:overflow", "Total number of received RTP packets dropped during DL queue overflow"},
+	[BTS_CTR_RTP_RX_DROP_V110_DEC] = {"rtp:rx:drop:v110_dec", "Total number of received RTP packets dropped during V.110 decode"},
+	[BTS_CTR_RTP_TX_TOTAL] =	{"rtp:tx:total", "Total number of transmitted RTP packets"},
+	[BTS_CTR_RTP_TX_MARKER] =	{"rtp:tx:marker", "Number of transmitted RTP packets with marker bit set"},
 };
 static const struct rate_ctr_group_desc bts_ctrg_desc = {
 	"bts",
@@ -148,7 +158,6 @@ struct osmo_tdef abis_T_defs[] = {
 	{}
 };
 
-static const uint8_t bts_nse_timer_default[] = { 3, 3, 3, 3, 30, 3, 10 };
 static const uint8_t bts_cell_timer_default[] =
 				{ 3, 3, 3, 3, 3, 10, 3, 10, 3, 10, 3 };
 static const struct gprs_rlc_cfg rlc_cfg_default = {
@@ -206,15 +215,16 @@ const char *btsatttr2str(enum bts_attribute v)
 const struct value_string bts_impl_flag_desc[] = {
 	{ BTS_INTERNAL_FLAG_MS_PWR_CTRL_DSP,	"DSP/HW based MS Power Control Loop" },
 	{ BTS_INTERNAL_FLAG_MEAS_PAYLOAD_COMB,	"Measurement and Payload data combined" },
+	{ BTS_INTERNAL_FLAG_NM_RCHANNEL_DEPENDS_RCARRIER, "OML RadioChannel MO depends on RadioCarrier MO" },
+	{ BTS_INTERNAL_FLAG_INTERF_MEAS,	"Uplink interference measurements" },
 	{ 0, NULL }
 };
 
+/* Ensure that all BTS_INTERNAL_FLAG_* entries are present in bts_impl_flag_desc[] */
+osmo_static_assert(ARRAY_SIZE(bts_impl_flag_desc) == _BTS_INTERNAL_FLAG_NUM + 1, _bts_impl_flag_desc);
+
 static int gsm_bts_talloc_destructor(struct gsm_bts *bts)
 {
-	if (bts->site_mgr.mo.fi) {
-		osmo_fsm_inst_free(bts->site_mgr.mo.fi);
-		bts->site_mgr.mo.fi = NULL;
-	}
 	if (bts->mo.fi) {
 		osmo_fsm_inst_free(bts->mo.fi);
 		bts->mo.fi = NULL;
@@ -223,19 +233,28 @@ static int gsm_bts_talloc_destructor(struct gsm_bts *bts)
 		osmo_fsm_inst_free(bts->shutdown_fi);
 		bts->shutdown_fi = NULL;
 	}
+
+	bts_osmux_release(bts);
+
+	llist_del(&bts->list);
+	g_bts_sm->num_bts--;
 	return 0;
 }
 
-struct gsm_bts *gsm_bts_alloc(void *ctx, uint8_t bts_num)
+struct gsm_bts *gsm_bts_alloc(struct gsm_bts_sm *bts_sm, uint8_t bts_num)
 {
-	struct gsm_bts *bts = talloc_zero(ctx, struct gsm_bts);
-	int i;
+	struct gsm_bts *bts = talloc_zero(bts_sm, struct gsm_bts);
 
 	if (!bts)
 		return NULL;
 
 	talloc_set_destructor(bts, gsm_bts_talloc_destructor);
 
+	/* add to list of BTSs */
+	llist_add_tail(&bts->list, &bts_sm->bts_list);
+	g_bts_sm->num_bts++;
+
+	bts->site_mgr = bts_sm;
 	bts->nr = bts_num;
 	bts->num_trx = 0;
 	INIT_LLIST_HEAD(&bts->trx_list);
@@ -248,32 +267,19 @@ struct gsm_bts *gsm_bts_alloc(void *ctx, uint8_t bts_num)
 					       LOGL_INFO, NULL);
 	osmo_fsm_inst_update_id_f(bts->shutdown_fi, "bts%d", bts->nr);
 
-	bts->site_mgr.mo.fi = osmo_fsm_inst_alloc(&nm_bts_sm_fsm, bts, &bts->site_mgr,
-						  LOGL_INFO, "bts_sm");
-	gsm_mo_init(&bts->site_mgr.mo, bts, NM_OC_SITE_MANAGER,
-		    0xff, 0xff, 0xff);
-
+	/* NM BTS */
 	bts->mo.fi = osmo_fsm_inst_alloc(&nm_bts_fsm, bts, bts,
 					 LOGL_INFO, NULL);
 	osmo_fsm_inst_update_id_f(bts->mo.fi, "bts%d", bts->nr);
 	gsm_mo_init(&bts->mo, bts, NM_OC_BTS, bts->nr, 0xff, 0xff);
 
-	for (i = 0; i < ARRAY_SIZE(bts->gprs.nsvc); i++) {
-		bts->gprs.nsvc[i].bts = bts;
-		bts->gprs.nsvc[i].id = i;
-		gsm_mo_init(&bts->gprs.nsvc[i].mo, bts, NM_OC_GPRS_NSVC,
-				bts->nr, i, 0xff);
-	}
-	memcpy(&bts->gprs.nse.timer, bts_nse_timer_default,
-		sizeof(bts->gprs.nse.timer));
-	gsm_mo_init(&bts->gprs.nse.mo, bts, NM_OC_GPRS_NSE,
-			bts->nr, 0xff, 0xff);
-	memcpy(&bts->gprs.cell.timer, bts_cell_timer_default,
-		sizeof(bts->gprs.cell.timer));
-	gsm_mo_init(&bts->gprs.cell.mo, bts, NM_OC_GPRS_CELL,
-			bts->nr, 0xff, 0xff);
-	memcpy(&bts->gprs.cell.rlc_cfg, &rlc_cfg_default,
-		sizeof(bts->gprs.cell.rlc_cfg));
+	/* NM GPRS CELL */
+	bts->gprs.cell.mo.fi = osmo_fsm_inst_alloc(&nm_gprs_cell_fsm, bts, &bts->gprs.cell,
+						  LOGL_INFO, NULL);
+	osmo_fsm_inst_update_id_f(bts->gprs.cell.mo.fi, "gprs_cell%d-0", bts->nr);
+	gsm_mo_init(&bts->gprs.cell.mo, bts, NM_OC_GPRS_CELL, bts->nr, 0, 0xff);
+	memcpy(&bts->gprs.cell.rlc_cfg, &rlc_cfg_default, sizeof(bts->gprs.cell.rlc_cfg));
+	memcpy(&bts->gprs.cell.timer, bts_cell_timer_default, sizeof(bts->gprs.cell.timer));
 
 	/* create our primary TRX. It will be initialized during bts_init() */
 	bts->c0 = gsm_bts_trx_alloc(bts);
@@ -289,14 +295,14 @@ struct gsm_bts *gsm_bts_alloc(void *ctx, uint8_t bts_num)
 	return bts;
 }
 
-struct gsm_bts *gsm_bts_num(const struct gsm_network *net, int num)
+struct gsm_bts *gsm_bts_num(const struct gsm_bts_sm *bts_sm, int num)
 {
 	struct gsm_bts *bts;
 
-	if (num >= net->num_bts)
+	if (num >= bts_sm->num_bts)
 		return NULL;
 
-	llist_for_each_entry(bts, &net->bts_list, list) {
+	llist_for_each_entry(bts, &bts_sm->bts_list, list) {
 		if (bts->nr == num)
 			return bts;
 	}
@@ -312,19 +318,14 @@ int bts_init(struct gsm_bts *bts)
 	static int initialized = 0;
 	void *tall_rtp_ctx;
 
-	/* add to list of BTSs */
-	llist_add_tail(&bts->list, &bts_gsmnet.bts_list);
-
 	bts->band = GSM_BAND_1800;
 
 	INIT_LLIST_HEAD(&bts->agch_queue.queue);
 	bts->agch_queue.length = 0;
 
 	bts->ctrs = rate_ctr_group_alloc(bts, &bts_ctrg_desc, bts->nr);
-	if (!bts->ctrs) {
-		llist_del(&bts->list);
+	if (!bts->ctrs)
 		return -1;
-	}
 
 	/* enable management with default levels,
 	 * raise threshold to GSM_BTS_AGCH_QUEUE_THRESH_LEVEL_DISABLE to
@@ -342,43 +343,48 @@ int bts_init(struct gsm_bts *bts)
 	bts->rtp_port_range_next = bts->rtp_port_range_start;
 	bts->rtp_ip_dscp = -1;
 	bts->rtp_priority = -1;
+	bts->emit_hr_rfc5993 = true;
 
 	/* Default (fall-back) MS/BS Power control parameters */
 	power_ctrl_params_def_reset(&bts->bs_dpc_params, true);
 	power_ctrl_params_def_reset(&bts->ms_dpc_params, false);
 
 	/* configurable via OML */
+	bts->bsic = 0xff; /* invalid value, guarded by bsc_configured=false */
+	bts->bsic_configured = false;
 	bts->load.ccch.load_ind_period = 112;
 	bts->rtp_jitter_buf_ms = 100;
-	bts->max_ta = 63;
+	bts->max_ta = MAX_TA_DEF;
 	bts->ny1 = 4;
+	bts->ny2 = 4;
 	bts->t3105_ms = 300;
+	bts->t3115_ms = 300;
 	bts->min_qual_rach = MIN_QUAL_RACH;
 	bts->min_qual_norm = MIN_QUAL_NORM;
 	bts->max_ber10k_rach = 1707; /* 7 of 41 bits is Eb/N0 of 0 dB = 0.1707 */
 	bts->pcu.sock_path = talloc_strdup(bts, PCU_SOCK_DEFAULT);
-	for (i = 0; i < ARRAY_SIZE(bts->t200_ms); i++)
-		bts->t200_ms[i] = oml_default_t200_ms[i];
+	bts->pcu.sock_wqueue_len_max = BTS_PCU_SOCK_WQUEUE_LEN_DEFAULT;
+	for (i = 0; i < ARRAY_SIZE(bts->t200_fn); i++)
+		bts->t200_fn[i] = oml_default_t200_fn[i];
 
 	/* default RADIO_LINK_TIMEOUT */
 	bts->radio_link_timeout.oml = 32;
 	bts->radio_link_timeout.current = bts->radio_link_timeout.oml;
 
-	/* Start with the site manager */
-	oml_mo_state_init(&bts->site_mgr.mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
+	/* Start with the BTS */
 	oml_mo_state_init(&bts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
-
-	/* set BTS attr to dependency */
-	oml_mo_state_init(&bts->gprs.nse.mo, NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY);
-	oml_mo_state_init(&bts->gprs.cell.mo, NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY);
-	oml_mo_state_init(&bts->gprs.nsvc[0].mo, NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY);
-	oml_mo_state_init(&bts->gprs.nsvc[1].mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OFF_LINE);
+	oml_mo_state_init(&bts->gprs.cell.mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
 
 	/* allocate a talloc pool for ORTP to ensure it doesn't have to go back
 	 * to the libc malloc all the time */
 	tall_rtp_ctx = talloc_pool(tall_bts_ctx, 262144);
 	osmo_rtp_init(tall_rtp_ctx);
 
+	/* Osmux */
+	rc = bts_osmux_init(bts);
+	if (rc < 0)
+		return rc;
+
 	/* features implemented in 'common', available for all models,
 	 * order alphabetically */
 	osmo_bts_set_feature(bts->features, BTS_FEAT_ABIS_OSMO_PCU);
@@ -387,16 +393,18 @@ int bts_init(struct gsm_bts *bts)
 	osmo_bts_set_feature(bts->features, BTS_FEAT_ETWS_PN);
 	osmo_bts_set_feature(bts->features, BTS_FEAT_IPV6_NSVC);
 	osmo_bts_set_feature(bts->features, BTS_FEAT_PAGING_COORDINATION);
+	osmo_bts_set_feature(bts->features, BTS_FEAT_TWTS001);
+	osmo_bts_set_feature(bts->features, BTS_FEAT_TWTS002);
+
+	/* Maximum TA supported by the PHY (can be overridden by PHY specific code) */
+	bts->support.max_ta = MAX_TA_DEF;
 
 	rc = bts_model_init(bts);
-	if (rc < 0) {
-		llist_del(&bts->list);
+	if (rc < 0)
 		return rc;
-	}
 
 	/* TRX0 was allocated early during gsm_bts_alloc, not later through VTY */
 	bts_model_trx_init(bts->c0);
-	bts_gsmnet.num_bts++;
 
 	if (!initialized) {
 		osmo_signal_register_handler(SS_GLOBAL, bts_signal_cbfn, NULL);
@@ -413,6 +421,9 @@ int bts_init(struct gsm_bts *bts)
 	bts->smscb_queue_tgt_len = 2;
 	bts->smscb_queue_hyst = 2;
 
+	bts->asci.pos_nch = -ENOTSUP;
+	INIT_LLIST_HEAD(&bts->asci.notifications);
+
 	INIT_LLIST_HEAD(&bts->bsc_oml_hosts);
 
 	/* register DTX DL FSM */
@@ -430,33 +441,13 @@ int bts_init(struct gsm_bts *bts)
 /* main link is established, send status report */
 int bts_link_estab(struct gsm_bts *bts)
 {
-	int i, j;
+	LOGP(DOML, LOGL_INFO, "Main link established, sending NM Status\n");
 
-	LOGP(DOML, LOGL_INFO, "Main link established, sending NM Status.\n");
-
-	/* BTS SITE MGR becomes Offline (tx SW ACT Report), BTS is DEPENDENCY */
-	osmo_fsm_inst_dispatch(bts->site_mgr.mo.fi, NM_EV_SW_ACT, NULL);
-	osmo_fsm_inst_dispatch(bts->mo.fi, NM_EV_SW_ACT, NULL);
-
-	/* those should all be in DEPENDENCY */
-	oml_tx_state_changed(&bts->gprs.nse.mo);
-	oml_tx_state_changed(&bts->gprs.cell.mo);
-	oml_tx_state_changed(&bts->gprs.nsvc[0].mo);
-	oml_tx_state_changed(&bts->gprs.nsvc[1].mo);
-
-	/* All other objects start off-line until the BTS Model code says otherwise */
-	for (i = 0; i < bts->num_trx; i++) {
-		struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, i);
-
-		oml_tx_state_changed(&trx->mo);
-		oml_tx_state_changed(&trx->bb_transc.mo);
-
-		for (j = 0; j < ARRAY_SIZE(trx->ts); j++) {
-			struct gsm_bts_trx_ts *ts = &trx->ts[j];
-
-			oml_tx_state_changed(&ts->mo);
-		}
-	}
+	/* Signal OML UP to BTS SITE MGR. It will automatically SW_ACT repoort
+	 * and become Disabled-Offline, then dispatch same event to its children
+	 * objects.
+	 */
+	osmo_fsm_inst_dispatch(bts->site_mgr->mo.fi, NM_EV_OML_UP, NULL);
 
 	return bts_model_oml_estab(bts);
 }
@@ -683,7 +674,7 @@ int bts_agch_enqueue(struct gsm_bts *bts, struct msgb *msg)
 	return 0;
 }
 
-struct msgb *bts_agch_dequeue(struct gsm_bts *bts)
+static struct msgb *bts_agch_dequeue(struct gsm_bts *bts)
 {
 	struct msgb *msg = msgb_dequeue(&bts->agch_queue.queue);
 	if (!msg)
@@ -749,12 +740,12 @@ static void compact_agch_queue(struct gsm_bts *bts)
 	return;
 }
 
-int bts_ccch_copy_msg(struct gsm_bts *bts, uint8_t *out_buf, struct gsm_time *gt,
-		      int is_ag_res)
+int bts_ccch_copy_msg(struct gsm_bts *bts, uint8_t *out_buf, struct gsm_time *gt, enum ccch_msgt ccch)
 {
 	struct msgb *msg = NULL;
 	int rc = 0;
 	int is_empty = 1;
+	const struct bts_agch_msg_cb *msg_cb;
 
 	/* Do queue house keeping.
 	 * This needs to be done every time a CCCH message is requested, since
@@ -763,26 +754,39 @@ int bts_ccch_copy_msg(struct gsm_bts *bts, uint8_t *out_buf, struct gsm_time *gt
 	 */
 	compact_agch_queue(bts);
 
-	/* Check for paging messages first if this is PCH */
-	if (!is_ag_res)
+	switch (ccch) {
+	case CCCH_MSGT_NCH:
+		/* Send NCH message, it has priority over AGCH and does not overlap with PCH. */
+		rc = bts_asci_notify_nch_gen_msg(bts, out_buf);
+		return rc;
+	case CCCH_MSGT_PCH:
+		/* Check whether the block may be overwritten by AGCH. */
 		rc = paging_gen_msg(bts->paging_state, out_buf, gt, &is_empty);
-
-	/* Check whether the block may be overwritten */
-	if (!is_empty)
-		return rc;
-
-	msg = bts_agch_dequeue(bts);
-	if (!msg)
-		return rc;
+		if (!is_empty)
+			return rc;
+		/* fall-through */
+	case CCCH_MSGT_AGCH:
+		/* If fallen here and the AGCH queue is empty, return empty PCH message. */
+		msg = bts_agch_dequeue(bts);
+		if (!msg)
+			return rc;
+		/* Continue to return AGCH message. */
+		break;
+	}
 
 	rate_ctr_inc2(bts->ctrs, BTS_CTR_AGCH_SENT);
 
+	/* Confirm sending of the AGCH message towards the PCU */
+	msg_cb = (struct bts_agch_msg_cb *) msg->cb;
+	if (msg_cb->confirm)
+		pcu_tx_data_cnf(msg_cb->msg_id, PCU_IF_SAPI_AGCH_2);
+
 	/* Copy AGCH message */
 	memcpy(out_buf, msgb_l3(msg), msgb_l3len(msg));
 	rc = msgb_l3len(msg);
 	msgb_free(msg);
 
-	if (is_ag_res)
+	if (ccch == CCCH_MSGT_AGCH)
 		bts->agch_queue.agch_msgs++;
 	else
 		bts->agch_queue.pch_msgs++;
@@ -810,30 +814,35 @@ struct gsm_time *get_time(struct gsm_bts *bts)
 	return &bts->gsm_time;
 }
 
-int bts_supports_cm(const struct gsm_bts *bts,
-		    const struct rsl_ie_chan_mode *cm)
+bool bts_supports_cm_speech(const struct gsm_bts *bts,
+			    const struct rsl_ie_chan_mode *cm)
 {
 	enum osmo_bts_features feature = _NUM_BTS_FEAT;
 
-	switch (cm->spd_ind) {
-	case RSL_CMOD_SPD_SIGN:
-		/* We assume that signalling support is mandatory,
-		 * there is no BTS_FEAT_* definition to check that. */
-		return 1;
-	case RSL_CMOD_SPD_SPEECH:
+	/* Stage 1: check support for the requested channel type */
+	switch (cm->chan_rt) {
+	case RSL_CMOD_CRT_TCH_GROUP_Bm:
+	case RSL_CMOD_CRT_TCH_GROUP_Lm:
+		if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VGCS))
+			return false;
+		break;
+	case RSL_CMOD_CRT_TCH_BCAST_Bm:
+	case RSL_CMOD_CRT_TCH_BCAST_Lm:
+		if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VBS))
+			return false;
+		break;
+	case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Bm:
+	case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Lm:
+		if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VAMOS))
+			return false;
 		break;
-	case RSL_CMOD_SPD_DATA:
-	default:
-		return 0;
 	}
 
-	/* Before the requested pchan/cm combination can be checked, we need to
-	 * convert it to a feature identifier we can check */
+	/* Stage 2: check support for the requested codec */
 	switch (cm->chan_rt) {
 	case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Bm:
-		if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VAMOS))
-			return 0;
-		/* fall-through */
+	case RSL_CMOD_CRT_TCH_GROUP_Bm:
+	case RSL_CMOD_CRT_TCH_BCAST_Bm:
 	case RSL_CMOD_CRT_TCH_Bm:
 		switch (cm->chan_rate) {
 		case RSL_CMOD_SP_GSM1:
@@ -847,14 +856,13 @@ int bts_supports_cm(const struct gsm_bts *bts,
 			break;
 		default:
 			/* Invalid speech codec type => Not supported! */
-			return 0;
+			return false;
 		}
 		break;
 
 	case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Lm:
-		if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VAMOS))
-			return 0;
-		/* fall-through */
+	case RSL_CMOD_CRT_TCH_GROUP_Lm:
+	case RSL_CMOD_CRT_TCH_BCAST_Lm:
 	case RSL_CMOD_CRT_TCH_Lm:
 		switch (cm->chan_rate) {
 		case RSL_CMOD_SP_GSM1:
@@ -865,7 +873,7 @@ int bts_supports_cm(const struct gsm_bts *bts,
 			break;
 		default:
 			/* Invalid speech codec type => Not supported! */
-			return 0;
+			return false;
 		}
 		break;
 
@@ -873,14 +881,59 @@ int bts_supports_cm(const struct gsm_bts *bts,
 		LOGP(DRSL, LOGL_ERROR,
 		     "Unhandled RSL channel type=0x%02x/rate=0x%02x\n",
 		     cm->chan_rt, cm->chan_rate);
-		return 0;
+		return false;
 	}
 
 	/* Check if the feature is supported by this BTS */
 	if (osmo_bts_has_feature(bts->features, feature))
-		return 1;
+		return true;
 
-	return 0;
+	return false;
+}
+
+static bool bts_supports_cm_data(const struct gsm_bts *bts,
+				 const struct rsl_ie_chan_mode *cm)
+{
+	switch (bts->variant) {
+	case BTS_OSMO_TRX:
+		switch (cm->chan_rate) {
+		case RSL_CMOD_CSD_NT_14k5:
+		case RSL_CMOD_CSD_T_14k4:
+		case RSL_CMOD_CSD_NT_12k0:
+		case RSL_CMOD_CSD_T_9k6:
+			if (cm->chan_rt != RSL_CMOD_CRT_TCH_Bm)
+				return false; /* invalid */
+			/* fall-through */
+		case RSL_CMOD_CSD_NT_6k0:
+		case RSL_CMOD_CSD_T_4k8:
+		case RSL_CMOD_CSD_T_2k4:
+		case RSL_CMOD_CSD_T_1k2:
+		case RSL_CMOD_CSD_T_600:
+		case RSL_CMOD_CSD_T_1200_75:
+			return true;
+		default:
+			return false;
+		}
+	default:
+		return 0;
+	}
+}
+
+bool bts_supports_cm(const struct gsm_bts *bts,
+		     const struct rsl_ie_chan_mode *cm)
+{
+	switch (cm->spd_ind) {
+	case RSL_CMOD_SPD_SIGN:
+		/* We assume that signalling support is mandatory,
+		 * there is no BTS_FEAT_* definition to check that. */
+		return true;
+	case RSL_CMOD_SPD_SPEECH:
+		return bts_supports_cm_speech(bts, cm);
+	case RSL_CMOD_SPD_DATA:
+		return bts_supports_cm_data(bts, cm);
+	default:
+		return false;
+	}
 }
 
 /* return the gsm_lchan for the CBCH (if it exists at all) */

src/common/bts_ctrl_commands.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -84,12 +84,45 @@ static int set_oml_alert(struct ctrl_cmd *cmd, void *data)
 	return CTRL_CMD_REPLY;
 }
 
+static int verify_max_ber10k_rach(struct ctrl_cmd *cmd, const char *value, void *_data)
+{
+	int max_ber10k_rach = atoi(cmd->value);
+
+	if (max_ber10k_rach < 0 || max_ber10k_rach > 10000) {
+		cmd->reply = "Value is out of range";
+		return 1;
+	}
+
+	return 0;
+}
+
+static int get_max_ber10k_rach(struct ctrl_cmd *cmd, void *data)
+{
+	cmd->reply = talloc_asprintf(cmd, "%u", g_bts->max_ber10k_rach);
+	if (!cmd->reply) {
+		cmd->reply = "OOM";
+		return CTRL_CMD_ERROR;
+	}
+
+	return CTRL_CMD_REPLY;
+}
+
+static int set_max_ber10k_rach(struct ctrl_cmd *cmd, void *data)
+{
+	g_bts->max_ber10k_rach = atoi(cmd->value);
+	cmd->reply = "OK";
+	return CTRL_CMD_REPLY;
+}
+
+CTRL_CMD_DEFINE(max_ber10k_rach, "max-ber10k-rach");
+
 int bts_ctrl_cmds_install(struct gsm_bts *bts)
 {
 	int rc = 0;
 
 	rc |= ctrl_cmd_install(CTRL_NODE_TRX, &cmd_therm_att);
 	rc |= ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_oml_alert);
+	rc |= ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_max_ber10k_rach);
 	g_bts = bts;
 
 	return rc;

src/common/bts_ctrl_lookup.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -88,14 +88,12 @@ err_index:
 	return -ERANGE;
 }
 
-struct ctrl_handle *bts_controlif_setup(struct gsm_bts *bts,
-					const char *bind_addr, uint16_t port)
+struct ctrl_handle *bts_controlif_setup(struct gsm_bts *bts, uint16_t port)
 {
 	struct ctrl_handle *hdl;
 	int rc = 0;
 
-	hdl = ctrl_interface_setup_dynip(bts, bind_addr, port,
-					 bts_ctrl_node_lookup);
+	hdl = ctrl_interface_setup(bts, port, bts_ctrl_node_lookup);
 	if (!hdl)
 		return NULL;
 

src/common/bts_shutdown_fsm.c

@@ -1,6 +1,6 @@
 /* BTS shutdown FSM */
 
-/* (C) 2020 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
  * Author: Pau Espin Pedrol <pespin@sysmocom.de>
  *
  * All Rights Reserved
@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -29,6 +29,7 @@
 #include <osmo-bts/gsm_data.h>
 #include <osmo-bts/bts_model.h>
 #include <osmo-bts/bts.h>
+#include <osmo-bts/bts_sm.h>
 #include <osmo-bts/nm_common_fsm.h>
 
 #define X(s) (1 << (s))
@@ -60,7 +61,7 @@ static void st_none(struct osmo_fsm_inst *fi, uint32_t event, void *data)
 	switch(event) {
 	case BTS_SHUTDOWN_EV_START:
 		/* Firt announce to NM objects that we are starting a shutdown procedure: */
-		osmo_fsm_inst_dispatch(bts->site_mgr.mo.fi, NM_EV_SHUTDOWN_START, NULL);
+		osmo_fsm_inst_dispatch(bts->site_mgr->mo.fi, NM_EV_SHUTDOWN_START, NULL);
 
 		count = count_trx_operational(bts);
 		if (count) {
@@ -89,7 +90,10 @@ static void st_wait_ramp_down_compl_on_enter(struct osmo_fsm_inst *fi, uint32_t
 	llist_for_each_entry(trx, &bts->trx_list, list) {
 		if (trx->mo.nm_state.operational != NM_OPSTATE_ENABLED)
 			continue;
-		power_ramp_start(trx, to_mdB(BTS_SHUTDOWN_POWER_RAMP_TGT), 1, ramp_down_compl_cb);
+		if (bts->shutdown_fi_skip_power_ramp)
+			power_ramp_force(trx, to_mdB(BTS_SHUTDOWN_POWER_RAMP_TGT), 1, ramp_down_compl_cb);
+		else
+			power_ramp_start(trx, to_mdB(BTS_SHUTDOWN_POWER_RAMP_TGT), 1, ramp_down_compl_cb);
 	}
 }
 
@@ -161,7 +165,7 @@ static void st_exit_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
 {
 	struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
 
-	osmo_fsm_inst_dispatch(bts->site_mgr.mo.fi, NM_EV_SHUTDOWN_FINISH, NULL);
+	osmo_fsm_inst_dispatch(bts->site_mgr->mo.fi, NM_EV_SHUTDOWN_FINISH, NULL);
 
 	if (bts->shutdown_fi_exit_proc) {
 		LOGPFSML(fi, LOGL_NOTICE, "Shutdown process completed successfully, exiting process\n");
@@ -250,7 +254,7 @@ bool bts_shutdown_in_progress(const struct gsm_bts *bts)
 	return fi->state != BTS_SHUTDOWN_ST_NONE;
 }
 
-void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc)
+void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc, bool skip_power_ramp)
 {
 	struct osmo_fsm_inst *fi = bts->shutdown_fi;
 	if (bts_shutdown_in_progress(bts)) {
@@ -260,6 +264,7 @@ void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc)
 		return;
 	}
 	bts->shutdown_fi_exit_proc = exit_proc;
+	bts->shutdown_fi_skip_power_ramp = skip_power_ramp;
 	LOGPFSML(fi, LOGL_NOTICE, "Shutting down BTS, exit %u, reason: %s\n",
 		 exit_proc, reason);
 	osmo_fsm_inst_dispatch(fi, BTS_SHUTDOWN_EV_START, NULL);
@@ -267,7 +272,7 @@ void bts_shutdown_ext(struct gsm_bts *bts, const char *reason, bool exit_proc)
 
 void bts_shutdown(struct gsm_bts *bts, const char *reason)
 {
-	bts_shutdown_ext(bts, reason, true);
+	bts_shutdown_ext(bts, reason, true, true);
 }
 
 void bts_model_trx_close_cb(struct gsm_bts_trx *trx, int rc)

src/common/bts_sm.c

@@ -0,0 +1,95 @@
+/* BTS support code common to all supported BTS models */
+
+/* (C) 2023 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/core/talloc.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/fsm.h>
+
+#include <osmo-bts/bts_sm.h>
+#include <osmo-bts/bts.h>
+#include <osmo-bts/nm_common_fsm.h>
+
+struct gsm_bts_sm *g_bts_sm;
+
+static const uint8_t nse_timer_default[] = { 3, 3, 3, 3, 30, 3, 10 };
+
+struct gsm_bts *gsm_gprs_nse_get_bts(const struct gsm_gprs_nse *nse)
+{
+	return gsm_bts_num(g_bts_sm, nse->mo.obj_inst.bts_nr);
+}
+
+static int gsm_bts_sm_talloc_destructor(struct gsm_bts_sm *bts_sm)
+{
+	struct gsm_bts *bts;
+
+	while ((bts = llist_first_entry_or_null(&bts_sm->bts_list, struct gsm_bts, list)))
+		talloc_free(bts);
+
+	if (bts_sm->mo.fi) {
+		osmo_fsm_inst_free(bts_sm->mo.fi);
+		bts_sm->mo.fi = NULL;
+	}
+
+	return 0;
+}
+
+struct gsm_bts_sm *gsm_bts_sm_alloc(void *talloc_ctx)
+{
+	struct gsm_bts_sm *bts_sm = talloc_zero(talloc_ctx, struct gsm_bts_sm);
+	struct gsm_gprs_nse *nse = &bts_sm->gprs.nse;
+	unsigned int i;
+
+	if (!bts_sm)
+		return NULL;
+
+	talloc_set_destructor(bts_sm, gsm_bts_sm_talloc_destructor);
+
+	INIT_LLIST_HEAD(&bts_sm->bts_list);
+
+	/* NM SITE_MGR */
+	bts_sm->mo.fi = osmo_fsm_inst_alloc(&nm_bts_sm_fsm, bts_sm, bts_sm,
+					    LOGL_INFO, "bts_sm");
+	gsm_mo_init(&bts_sm->mo, NULL, NM_OC_SITE_MANAGER,
+		    0xff, 0xff, 0xff);
+	oml_mo_state_init(&bts_sm->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
+
+	/* NM GPRS NSE */
+	nse->mo.fi = osmo_fsm_inst_alloc(&nm_gprs_nse_fsm, bts_sm, nse,
+					 LOGL_INFO, "gprs_nse0");
+	gsm_mo_init(&nse->mo, NULL, NM_OC_GPRS_NSE, 0, 0xff, 0xff);
+	oml_mo_state_init(&nse->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
+	memcpy(&nse->timer, nse_timer_default, sizeof(nse->timer));
+
+	/* NM GPRS NSVCs */
+	for (i = 0; i < ARRAY_SIZE(nse->nsvc); i++) {
+		struct gsm_gprs_nsvc *nsvc = &nse->nsvc[i];
+		nsvc->nse = nse;
+		nsvc->id = i;
+		nsvc->mo.fi = osmo_fsm_inst_alloc(&nm_gprs_nsvc_fsm, bts_sm, nsvc,
+						  LOGL_INFO, NULL);
+		osmo_fsm_inst_update_id_f(nsvc->mo.fi, "gprs_nsvc%d-%d",
+					  nse->mo.obj_inst.bts_nr, i);
+		gsm_mo_init(&nsvc->mo, NULL, NM_OC_GPRS_NSVC, nse->mo.obj_inst.bts_nr, i, 0xff);
+		oml_mo_state_init(&nsvc->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
+	}
+
+	return bts_sm;
+}

src/common/bts_trx.c

@@ -74,12 +74,17 @@ static void gsm_bts_trx_init_ts(struct gsm_bts_trx *trx)
 		ts->trx = trx;
 		ts->nr = tn;
 
+		ts->tsc_oml_configured = false;
+		ts->tsc_rsl_configured = false;
+		ts->tsc = ts->tsc_oml = ts->tsc_rsl = 0xff;
+
 		ts->mo.fi = osmo_fsm_inst_alloc(&nm_chan_fsm, trx, ts,
 						LOGL_INFO, NULL);
 		osmo_fsm_inst_update_id_f(ts->mo.fi, "%s-ts%u",
 					  trx->bb_transc.mo.fi->id, ts->nr);
 		gsm_mo_init(&ts->mo, trx->bts, NM_OC_CHANNEL,
 			    trx->bts->nr, trx->nr, ts->nr);
+		oml_mo_state_init(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
 
 		gsm_bts_trx_ts_init_lchan(ts);
 	}
@@ -99,6 +104,10 @@ void gsm_bts_trx_init_shadow_ts(struct gsm_bts_trx *trx)
 		ts->trx = trx;
 		ts->nr = tn;
 
+		ts->tsc_oml_configured = false;
+		ts->tsc_rsl_configured = false;
+		ts->tsc = ts->tsc_oml = ts->tsc_rsl = 0xff;
+
 		/* Link both primary and shadow */
 		trx->ts[tn].vamos.peer = ts;
 		ts->vamos.peer = &trx->ts[tn];
@@ -148,14 +157,14 @@ struct gsm_bts_trx *gsm_bts_trx_alloc(struct gsm_bts *bts)
 	trx->mo.fi = osmo_fsm_inst_alloc(&nm_rcarrier_fsm, trx, trx,
 						  LOGL_INFO, NULL);
 	osmo_fsm_inst_update_id_f(trx->mo.fi, "bts%d-trx%d", bts->nr, trx->nr);
-	gsm_mo_init(&trx->mo, bts, NM_OC_RADIO_CARRIER,
-		    bts->nr, trx->nr, 0xff);
+	gsm_mo_init(&trx->mo, bts, NM_OC_RADIO_CARRIER, bts->nr, trx->nr, 0xff);
+	oml_mo_state_init(&trx->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
 
 	trx->bb_transc.mo.fi = osmo_fsm_inst_alloc(&nm_bb_transc_fsm, trx, &trx->bb_transc,
 						  LOGL_INFO, NULL);
 	osmo_fsm_inst_update_id_f(trx->bb_transc.mo.fi, "bts%d-trx%d", bts->nr, trx->nr);
-	gsm_mo_init(&trx->bb_transc.mo, bts, NM_OC_BASEB_TRANSC,
-		    bts->nr, trx->nr, 0xff);
+	gsm_mo_init(&trx->bb_transc.mo, bts, NM_OC_BASEB_TRANSC, bts->nr, trx->nr, 0xff);
+	oml_mo_state_init(&trx->bb_transc.mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
 
 	gsm_bts_trx_init_ts(trx);
 
@@ -227,10 +236,13 @@ int trx_link_estab(struct gsm_bts_trx *trx)
 	osmo_fsm_inst_dispatch(trx->mo.fi, NM_EV_RSL_UP, NULL);
 	osmo_fsm_inst_dispatch(trx->bb_transc.mo.fi, NM_EV_RSL_UP, NULL);
 
-	if ((rc = rsl_tx_rf_res(trx)) < 0)
-		oml_tx_failure_event_rep(&trx->bb_transc.mo, NM_SEVER_MAJOR, OSMO_EVT_MAJ_RSL_FAIL,
-					 "Failed to establish RSL link (%d)", rc);
-
+	if (trx->mo.nm_state.operational == NM_OPSTATE_ENABLED ||
+	    trx->bb_transc.mo.nm_state.operational == NM_OPSTATE_ENABLED) {
+		rc = rsl_tx_rf_res(trx);
+		if (rc < 0)
+			oml_tx_failure_event_rep(&trx->bb_transc.mo, NM_SEVER_MAJOR, OSMO_EVT_MAJ_RSL_FAIL,
+						 "Failed to establish RSL link (%d)", rc);
+	}
 	if (trx == trx->bts->c0)
 		load_timer_start(trx->bts);
 

src/common/cbch.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -139,12 +139,8 @@ static int get_smscb_block(struct bts_smscb_state *bts_ss, uint8_t *out, uint8_t
 		block_type->seq_nr = block_nr;
 
 	/* determine if this is the last block */
-	if (block_nr + 1 == msg->num_segs)
-		block_type->lb = 1;
-	else
-		block_type->lb = 0;
-
-	if (block_nr == 4) {
+	block_type->lb = (block_nr + 1 == msg->num_segs);
+	if (block_type->lb) {
 		if (msg != bts_ss->default_msg) {
 			DEBUGPGT(DLSMS, g_time, "%s: deleting fully-transmitted message %p\n",
 				 chan_name, msg);

src/common/csd_rlp.c

@@ -0,0 +1,228 @@
+/* This module has been split from l1sap.c; original header comments preserved:
+ *
+ * (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+
+#include <osmocom/core/bits.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/gsm/l1sap.h>
+#include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/gsm/rsl.h>
+#include <osmocom/gsm/rlp.h>
+#include <osmocom/gsm/rtp_extensions.h>
+#include <osmocom/core/gsmtap.h>
+#include <osmocom/core/gsmtap_util.h>
+#include <osmocom/core/utils.h>
+
+#include <osmo-bts/logging.h>
+#include <osmo-bts/gsm_data.h>
+#include <osmo-bts/lchan.h>
+#include <osmo-bts/bts.h>
+#include <osmo-bts/csd_rlp.h>
+
+/* In the case of TCH/F4.8 NT, each 240-bit RLP frame is split between
+ * two channel-coding blocks of 120 bits each.  We need to know which
+ * frame numbers correspond to which half: in the UL-to-RTP path we have
+ * to set bit E2 based on the TDMA frame number at which we received the
+ * block in question, and in the DL direction we have to transmit the
+ * right half at the right time.
+ *
+ * See GSM 05.03 section 3.4.1 and the mapping tables of GSM 05.02;
+ * having "e2_map" in the array name shall serve as a mnemonic as to
+ * the sense of this array: 0 means 1st half and 1 means 2nd half,
+ * exactly as the value of bit E2 per TS 48.020 section 15.1.
+ */
+const uint8_t csd_tchf48_nt_e2_map[26] = {
+	[4]  = 1,	/* B1 position */
+	[13] = 1,	/* B3 position */
+	[21] = 1,	/* B5 position */
+};
+
+/* This function resets (clears) the state of the DL alignment buffer.
+ * It needs to be called when we encounter a gap (packet loss, invalid
+ * packets, etc) in our RTP input stream. */
+void ntcsd_dl_reset(struct gsm_lchan *lchan)
+{
+	lchan->tch.csd.rlpdl_fill_level = 0;
+}
+
+/* This function is to be called with the decoded content of a single
+ * incoming RTP packet (data and alignment bits) for TCH/[FH]4.8 NT. */
+void ntcsd_dl_input_48(struct gsm_lchan *lchan, const ubit_t *data_bits,
+			uint8_t align_bits)
+{
+	memmove(lchan->tch.csd.rlpdl_data_bits,
+		lchan->tch.csd.rlpdl_data_bits + 60 * 2, 60 * 5);
+	memcpy(lchan->tch.csd.rlpdl_data_bits + 60 * 5, data_bits, 60 * 2);
+	lchan->tch.csd.rlpdl_align_bits <<= 4;
+	lchan->tch.csd.rlpdl_align_bits |= (align_bits & 0xF);
+	lchan->tch.csd.rlpdl_fill_level += 2;
+	if (lchan->tch.csd.rlpdl_fill_level > 7)
+		lchan->tch.csd.rlpdl_fill_level = 7;
+}
+
+/* This function is to be called with the decoded content of a single
+ * incoming RTP packet (data and alignment bits) for TCH/F9.6 NT. */
+void ntcsd_dl_input_96(struct gsm_lchan *lchan, const ubit_t *data_bits,
+			uint8_t align_bits)
+{
+	memmove(lchan->tch.csd.rlpdl_data_bits,
+		lchan->tch.csd.rlpdl_data_bits + 60 * 4, 60 * 3);
+	memcpy(lchan->tch.csd.rlpdl_data_bits + 60 * 3, data_bits, 60 * 4);
+	lchan->tch.csd.rlpdl_align_bits <<= 8;
+	lchan->tch.csd.rlpdl_align_bits |= (align_bits & 0xFF);
+	lchan->tch.csd.rlpdl_fill_level += 4;
+	if (lchan->tch.csd.rlpdl_fill_level > 7)
+		lchan->tch.csd.rlpdl_fill_level = 7;
+}
+
+/* This function is to be called to obtain a complete RLP frame for
+ * downlink transmission.  It will provide either a properly aligned
+ * frame (return value true) or a filler (return value false). */
+bool ntcsd_dl_output(struct gsm_lchan *lchan, ubit_t *rlp_frame_out)
+{
+	if (lchan->tch.csd.rlpdl_fill_level < 4)
+		goto no_frame_out;
+	if (((lchan->tch.csd.rlpdl_align_bits >> 0) & 0xFF) == NTCSD_ALIGNED_EBITS) {
+		memcpy(rlp_frame_out, lchan->tch.csd.rlpdl_data_bits + 60 * 3,
+			60 * 4);
+		return true;
+	}
+	if (lchan->tch.csd.rlpdl_fill_level < 5)
+		goto no_frame_out;
+	if (((lchan->tch.csd.rlpdl_align_bits >> 2) & 0xFF) == NTCSD_ALIGNED_EBITS) {
+		memcpy(rlp_frame_out, lchan->tch.csd.rlpdl_data_bits + 60 * 2,
+			60 * 4);
+		return true;
+	}
+	if (lchan->tch.csd.rlpdl_fill_level < 6)
+		goto no_frame_out;
+	if (((lchan->tch.csd.rlpdl_align_bits >> 4) & 0xFF) == NTCSD_ALIGNED_EBITS) {
+		memcpy(rlp_frame_out, lchan->tch.csd.rlpdl_data_bits + 60 * 1,
+			60 * 4);
+		return true;
+	}
+	if (lchan->tch.csd.rlpdl_fill_level < 7)
+		goto no_frame_out;
+	if (((lchan->tch.csd.rlpdl_align_bits >> 6) & 0xFF) == NTCSD_ALIGNED_EBITS) {
+		memcpy(rlp_frame_out, lchan->tch.csd.rlpdl_data_bits, 60 * 4);
+		return true;
+	}
+no_frame_out:
+	/* TS 44.021 section 12.1 says that a missing/unavailable 240-bit
+	 * RLP frame is to be filled with 0 bits, unlike ones-fill
+	 * used everywhere else in the world of V.110 and CSD. */
+	memset(rlp_frame_out, 0, 60 * 4);
+	return false;
+}
+
+/* process one MAC block of unpacked bits of a non-transparent CSD channel */
+void gsmtap_csd_rlp_process(struct gsm_lchan *lchan, bool is_uplink,
+			    const struct ph_tch_param *tch_ind,
+			    const ubit_t *data, unsigned int data_len)
+{
+	struct gsm_bts_trx *trx = lchan->ts->trx;
+	struct gsmtap_inst *inst = trx->bts->gsmtap.inst;
+	pbit_t *rlp_buf;
+	uint16_t arfcn;
+	int byte_len;
+
+	if (!inst || !trx->bts->gsmtap.rlp)
+		return;
+
+	if (lchan->csd_mode != LCHAN_CSD_M_NT)
+		return;
+
+	if (is_uplink)
+		rlp_buf = lchan->tch.csd.rlp_buf_ul;
+	else
+		rlp_buf = lchan->tch.csd.rlp_buf_dl;
+
+	/* TCH/F 9.6: 4x60bit block => 240bit RLP frame
+	 * TCH/F 4.8: 2x 2x60bit blocks starting at B0/B2/B4 => 240bit RLP frame
+	 * TCH/H 4.8: 4x60bit block => 240bit RLP frame
+	 * TCH/F 2.4: 2x36bit blocks => transparent only
+	 * TCH/H 2.4: 4x36bit blocks => transparent only
+	 * TCH/F 14.4: 2x 290 bit block (starting with M1=0) => 576-bit RLP frame
+	 */
+
+	if (lchan->type == GSM_LCHAN_TCH_F &&
+	    lchan->tch_mode == GSM48_CMODE_DATA_6k0 && is_uplink) {
+		/* In this mode we have 120-bit MAC blocks; two of them need
+		 * to be concatenated to render a 240-bit RLP frame. The first
+		 * block is present in B0/B2/B4, and we have to use FN to
+		 * detect this position.
+		 * This code path is only for UL: in the case of DL,
+		 * alignment logic elsewhere in the code will present us
+		 * with a fully assembled RLP frame. */
+		OSMO_ASSERT(data_len == 120);
+		if (csd_tchf48_nt_e2_map[tch_ind->fn % 26] == 0) {
+			osmo_ubit2pbit_ext(rlp_buf, 0, data, 0, data_len, 1);
+			return;
+		}
+		osmo_ubit2pbit_ext(rlp_buf, 120, data, 0, data_len, 1);
+		byte_len = 240/8;
+	} else if (lchan->type == GSM_LCHAN_TCH_F && lchan->tch_mode == GSM48_CMODE_DATA_14k5) {
+		/* in this mode we have 290bit MAC blocks containing M1, M2 and 288 data bits;
+		 * two of them need to be concatenated to render a
+		 * 576-bit RLP frame. The start of a RLP frame is
+		 * denoted by a block with M1-bit set to 0. */
+		OSMO_ASSERT(data_len == 290);
+		ubit_t m1 = data[0];
+		if (m1 == 0) {
+			osmo_ubit2pbit_ext(rlp_buf, 0, data, 2, data_len, 1);
+			return;
+		}
+		osmo_ubit2pbit_ext(rlp_buf, 288, data, 2, data_len, 1);
+		byte_len = 576/8;
+	} else {
+		byte_len = osmo_ubit2pbit_ext(rlp_buf, 0, data, 0, data_len, 1);
+	}
+
+	if (trx->bts->gsmtap.rlp_skip_null) {
+		struct osmo_rlp_frame_decoded rlpf;
+		int rc = osmo_rlp_decode(&rlpf, 0, rlp_buf, byte_len);
+		if (rc == 0 && rlpf.ftype == OSMO_RLP_FT_U && rlpf.u_ftype == OSMO_RLP_U_FT_NULL)
+			return;
+	}
+
+	arfcn = trx->arfcn;
+	if (is_uplink)
+		arfcn |= GSMTAP_ARFCN_F_UPLINK;
+
+	gsmtap_send_ex(inst, GSMTAP_TYPE_GSM_RLP, arfcn, lchan->ts->nr,
+		       lchan->type == GSM_LCHAN_TCH_H ? GSMTAP_CHANNEL_VOICE_H : GSMTAP_CHANNEL_VOICE_F,
+		       lchan->nr, tch_ind->fn, tch_ind->rssi, 0, rlp_buf, byte_len);
+
+}
+
+/* wrapper for downlink path */
+void gsmtap_csd_rlp_dl(struct gsm_lchan *lchan, uint32_t fn,
+			const ubit_t *data, unsigned int data_len)
+{
+	/* 'fake' tch_ind containing all-zero so gsmtap code can be shared
+	 * between UL and DL */
+	const struct ph_tch_param fake_tch_ind = { .fn = fn };
+	gsmtap_csd_rlp_process(lchan, false, &fake_tch_ind, data, data_len);
+}

src/common/csd_v110.c

@@ -0,0 +1,242 @@
+/*
+ * (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * Author: Vadim Yanitskiy <vyanitskiy@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 <stdint.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include <osmocom/core/bits.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/gsm/gsm44021.h>
+#include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/gsm/protocol/gsm_04_08.h>
+#include <osmocom/isdn/v110.h>
+#include <osmocom/trau/csd_ra2.h>
+#include <osmocom/trau/csd_raa_prime.h>
+
+#include <osmo-bts/csd_v110.h>
+#include <osmo-bts/lchan.h>
+
+/* key is enum gsm48_chan_mode, so assuming a value in range 0..255 */
+const struct csd_v110_lchan_desc csd_v110_lchan_desc[256] = {
+	[GSM48_CMODE_DATA_14k5] = {
+		/* TCH/F14.4: 8 * 36 + 2 bits every 20 ms (14.5 kbit/s) */
+		.num_frames = 8,
+		.num_frame_bits = 36,	/* D-bits */
+		.num_other_bits = 2,	/* M-bits */
+		.ra2_ir = 16,
+	},
+	[GSM48_CMODE_DATA_12k0] = {
+		/* TCH/F9.6: 4 * 60 bits every 20 ms (12.0 kbit/s) */
+		.num_frames = 4,
+		.num_frame_bits = 60,
+		.ra2_ir = 16,
+	},
+	[GSM48_CMODE_DATA_6k0] = {
+		/* TCH/[FH]4.8: 2 * 60 bits every 20 ms (6.0 kbit/s) */
+		.num_frames = 2,
+		.num_frame_bits = 60,
+		.ra2_ir = 8,
+	},
+	[GSM48_CMODE_DATA_3k6] = {
+		/* TCH/[FH]2.4: 2 * 36 bits every 20 ms (3.6 kbit/s) */
+		.num_frames = 2,
+		.num_frame_bits = 36,
+		.ra2_ir = 8,
+	},
+};
+
+/* 3GPP TS 44.021, Figure 4: Coding of data rates (E1/E2/E3 bits) */
+static const uint8_t e1e2e3_map[_LCHAN_CSD_M_NUM][3] = {
+	[LCHAN_CSD_M_T_600]	= { 1, 0, 0 },
+	[LCHAN_CSD_M_T_1200]	= { 0, 1, 0 },
+	[LCHAN_CSD_M_T_2400]	= { 1, 1, 0 },
+	[LCHAN_CSD_M_T_4800]	= { 0, 1, 1 },
+	[LCHAN_CSD_M_T_9600]	= { 0, 1, 1 },
+#if 0
+	[LCHAN_CSD_M_T_19200]	= { 0, 1, 1 },
+	[LCHAN_CSD_M_T_38400]	= { 0, 1, 1 },
+	[LCHAN_CSD_M_T_14400]	= { 1, 0, 1 },
+	[LCHAN_CSD_M_T_28800]	= { 1, 0, 1 },
+#endif
+};
+
+int csd_v110_rtp_encode(const struct gsm_lchan *lchan, uint8_t *rtp,
+			const uint8_t *data, size_t data_len,
+			uint8_t nt48_half_num)
+{
+	const struct csd_v110_lchan_desc *desc;
+	ubit_t ra_bits[80 * 4];
+
+	OSMO_ASSERT(lchan->tch_mode < ARRAY_SIZE(csd_v110_lchan_desc));
+	desc = &csd_v110_lchan_desc[lchan->tch_mode];
+	if (OSMO_UNLIKELY(desc->num_frames == 0))
+		return -ENOTSUP;
+
+	/* TCH/F14.4 is special: RAA' function is employed */
+	if (lchan->tch_mode == GSM48_CMODE_DATA_14k5) {
+		/* 3GPP TS 44.021, section 10.3 "TCH/F14.4 channel coding"
+		 * 3GPP TS 48.020, chapter 11 "THE RAA' FUNCTION" */
+		const ubit_t *m_bits = &data[0]; /* M-bits */
+		const ubit_t *d_bits = &data[2]; /* D-bits */
+		ubit_t c4, c5;
+
+		/* 3GPP TS 48.020, Table 3
+		 * | C4 | Date Rate |
+		 * | =1 | 14,4 kbit/s |
+		 * | =0 | 14.4 kbit/s idle (IWF to BSS only) | */
+		c4 = 1;
+		/* 3GPP TS 48.020, Table 4
+		 * | C5 | BSS to IWF FT | IWF to BSS UFE |
+		 * | =1 | idle | framing error |
+		 * | =0 | data | no framing error | */
+		c5 = 0;
+
+		/* Unless there is a bug, it's highly unlikely */
+		OSMO_ASSERT(data_len == CSD_V110_NUM_BITS(desc));
+
+		osmo_csd144_to_atrau_bits(&ra_bits[0], m_bits, d_bits, c4, c5);
+		goto ra1_ra2;
+	}
+
+	/* handle empty/incomplete Uplink frames gracefully */
+	if (OSMO_UNLIKELY(data_len < CSD_V110_NUM_BITS(desc))) {
+		/* encode N idle frames as per 3GPP TS 44.021, section 8.1.6 */
+		memset(&ra_bits[0], 0x01, sizeof(ra_bits));
+		for (unsigned int i = 0; i < desc->num_frames; i++)
+			memset(&ra_bits[i * 80], 0x00, 8); /* alignment pattern */
+		goto ra1_ra2;
+	}
+
+	/* RA1'/RA1: convert from radio rate to an intermediate data rate */
+	for (unsigned int i = 0; i < desc->num_frames; i++) {
+		struct osmo_v110_decoded_frame df;
+
+		/* convert a V.110 36-/60-bit frame to a V.110 80-bit frame */
+		if (desc->num_frame_bits == 60)
+			osmo_csd_12k_6k_decode_frame(&df, &data[i * 60], 60);
+		else /* desc->num_frame_bits == 36 */
+			osmo_csd_3k6_decode_frame(&df, &data[i * 36], 36);
+
+		/* E1 .. E3 must set by out-of-band knowledge */
+		if (lchan->csd_mode == LCHAN_CSD_M_NT) {
+			/* non-transparent: as per 3GPP TS 48.020, Table 7 */
+			/* E1: as per 15.1.2, shall be set to 0 (for BSS-MSC) */
+			df.e_bits[0] = 0;
+			/* E2: 0 for Q1/Q2, 1 for Q3/Q4 */
+			if (desc->num_frames == 4)
+				df.e_bits[1] = (i >> 1) & 0x01;
+			else
+				df.e_bits[1] = nt48_half_num;
+			/* E3: 0 for Q1/Q3, 1 for Q2/Q4 */
+			df.e_bits[2] = (i >> 0) & 0x01;
+		} else {
+			/* transparent: as per 3GPP TS 44.021, Figure 4 */
+			df.e_bits[0] = e1e2e3_map[lchan->csd_mode][0]; /* E1 */
+			df.e_bits[1] = e1e2e3_map[lchan->csd_mode][1]; /* E2 */
+			df.e_bits[2] = e1e2e3_map[lchan->csd_mode][2]; /* E3 */
+		}
+
+		osmo_v110_encode_frame(&ra_bits[i * 80], 80, &df);
+	}
+
+ra1_ra2:
+	/* RA1/RA2: convert from an intermediate rate to 64 kbit/s */
+	if (desc->ra2_ir == 16)
+		osmo_csd_ra2_16k_pack(&rtp[0], &ra_bits[0], RFC4040_RTP_PLEN);
+	else /* desc->ra2_ir == 8 */
+		osmo_csd_ra2_8k_pack(&rtp[0], &ra_bits[0], RFC4040_RTP_PLEN);
+
+	return RFC4040_RTP_PLEN;
+}
+
+static bool check_v110_align(const ubit_t *ra_bits)
+{
+	int i;
+	ubit_t bit0 = 0, bit1 = 1;
+
+	/* The weird code structure is for performance optimization,
+	 * to avoid conditionals inside loops. */
+	for (i = 0; i < 8; i++)
+		bit0 |= ra_bits[i];
+	for (i = 1; i < 10; i++)
+		bit1 &= ra_bits[i * 8];
+	return (bit0 == 0) && (bit1 == 1);
+}
+
+int csd_v110_rtp_decode(const struct gsm_lchan *lchan, uint8_t *data,
+			uint8_t *align_bits, const uint8_t *rtp, size_t rtp_len)
+{
+	const struct csd_v110_lchan_desc *desc;
+	ubit_t ra_bits[80 * 4];
+	uint8_t align_accum = 0;
+
+	OSMO_ASSERT(lchan->tch_mode < ARRAY_SIZE(csd_v110_lchan_desc));
+	desc = &csd_v110_lchan_desc[lchan->tch_mode];
+	if (OSMO_UNLIKELY(desc->num_frames == 0))
+		return -ENOTSUP;
+
+	if (OSMO_UNLIKELY(rtp_len != RFC4040_RTP_PLEN))
+		return -EINVAL;
+
+	/* RA1/RA2: convert from 64 kbit/s to an intermediate rate */
+	if (desc->ra2_ir == 16)
+		osmo_csd_ra2_16k_unpack(&ra_bits[0], &rtp[0], RFC4040_RTP_PLEN);
+	else /* desc->ra2_ir == 8 */
+		osmo_csd_ra2_8k_unpack(&ra_bits[0], &rtp[0], RFC4040_RTP_PLEN);
+
+	/* TCH/F14.4 is special: RAA' function is employed */
+	if (lchan->tch_mode == GSM48_CMODE_DATA_14k5) {
+		/* 3GPP TS 44.021, section 10.3 "TCH/F14.4 channel coding"
+		 * 3GPP TS 48.020, chapter 11 "THE RAA' FUNCTION" */
+		ubit_t *m_bits = &data[0]; /* M-bits */
+		ubit_t *d_bits = &data[2]; /* D-bits */
+		int rc;
+
+		rc = osmo_csd144_from_atrau_bits(m_bits, d_bits, NULL, NULL, &ra_bits[0]);
+		return rc == 0 ? CSD_V110_NUM_BITS(desc) : rc;
+	}
+
+	/* RA1'/RA1: convert from an intermediate rate to radio rate */
+	for (unsigned int i = 0; i < desc->num_frames; i++) {
+		struct osmo_v110_decoded_frame df;
+
+		/* We require our RTP input to consist of aligned V.110
+		 * frames.  If we get misaligned input, let's catch it
+		 * explicitly, rather than send garbage downstream. */
+		if (!check_v110_align(&ra_bits[i * 80]))
+			return -EINVAL;
+		/* convert a V.110 80-bit frame to a V.110 36-/60-bit frame */
+		osmo_v110_decode_frame(&df, &ra_bits[i * 80], 80);
+		if (desc->num_frame_bits == 60)
+			osmo_csd_12k_6k_encode_frame(&data[i * 60], 60, &df);
+		else /* desc->num_frame_bits == 36 */
+			osmo_csd_3k6_encode_frame(&data[i * 36], 36, &df);
+		/* save bits E2 & E3 that may be needed for RLP alignment */
+		align_accum <<= 2;
+		align_accum |= df.e_bits[1] << 1;
+		align_accum |= df.e_bits[2] << 0;
+	}
+
+	if (align_bits)
+		*align_bits = align_accum;
+	return CSD_V110_NUM_BITS(desc);
+}

src/common/dtx_dl_amr_fsm.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.

src/common/gsm_data.c

@@ -306,6 +306,29 @@ bool ts_is_pdch(const struct gsm_bts_trx_ts *ts)
 	}
 }
 
+/* Apply ts->tsc based on what was configured coming from different sources.
+ * Priorities (preferred first, overrides ones afterward):
+ * 1- RSL OSMO_TSC IE
+ * 2- OML SetChannelAttr TSC IE
+ * 3- OML SetBtsAttr BSIC IE
+ */
+void gsm_ts_apply_configured_tsc(struct gsm_bts_trx_ts *ts)
+{
+	if (ts->tsc_rsl_configured) {
+		ts->tsc = ts->tsc_rsl;
+		return;
+	}
+	if (ts->tsc_oml_configured) {
+		ts->tsc = ts->tsc_oml;
+		return;
+	}
+	if (ts->trx->bts->bsic_configured) {
+		ts->tsc = BTS_TSC(ts->trx->bts);
+		return;
+	}
+	ts->tsc = 0xff; /* invalid value */
+}
+
 void gsm_ts_release(struct gsm_bts_trx_ts *ts)
 {
 	unsigned int ln;
@@ -318,4 +341,8 @@ void gsm_ts_release(struct gsm_bts_trx_ts *ts)
 	/* Make sure pchan_is is reset, since PCU act_req to release it will be
 	 * ignored as the lchan will already be released. */
 	ts->dyn.pchan_is = ts->dyn.pchan_want = GSM_PCHAN_NONE;
+
+	ts->tsc_oml_configured = false;
+	ts->tsc_rsl_configured = false;
+	ts->tsc = ts->tsc_oml = ts->tsc_rsl = 0xff;
 }

src/common/handover.c

@@ -14,7 +14,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.

src/common/lchan.c

@@ -12,13 +12,15 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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 "btsconfig.h"	/* for PACKAGE_VERSION */
+
 #include <osmocom/core/logging.h>
 
 #include <osmocom/trau/osmo_ortp.h>
@@ -31,6 +33,7 @@
 #include <osmo-bts/handover.h>
 #include <osmo-bts/l1sap.h>
 #include <osmo-bts/bts_model.h>
+#include <osmo-bts/asci.h>
 #include <errno.h>
 
 static const struct value_string lchan_s_names[] = {
@@ -53,42 +56,55 @@ const struct value_string lchan_ciph_state_names[] = {
 	{ 0, NULL }
 };
 
+const struct value_string lchan_csd_mode_descs[] = {
+	{ LCHAN_CSD_M_NT,		"non-transparent" },
+	{ LCHAN_CSD_M_T_1200_75,	"transparent @ 1200/75 bps" },
+	{ LCHAN_CSD_M_T_600,		"transparent @ 600 bps" },
+	{ LCHAN_CSD_M_T_1200,		"transparent @ 1200 bps" },
+	{ LCHAN_CSD_M_T_2400,		"transparent @ 2400 bps" },
+	{ LCHAN_CSD_M_T_4800,		"transparent @ 4800 bps" },
+	{ LCHAN_CSD_M_T_9600,		"transparent @ 9600 bps" },
+	{ LCHAN_CSD_M_T_14400,		"transparent @ 14400 bps" },
+	{ LCHAN_CSD_M_T_29000,		"transparent @ 29000 bps" },
+	{ LCHAN_CSD_M_T_32000,		"transparent @ 32000 bps" },
+	{ 0, NULL }
+};
+
 /* prepare the per-SAPI T200 arrays for a given lchan */
-static int t200_by_lchan(int *t200_ms_dcch, int *t200_ms_acch, struct gsm_lchan *lchan)
+static int t200_by_lchan(uint32_t *t200_fn_dcch, uint32_t *t200_fn_acch, struct gsm_lchan *lchan)
 {
 	struct gsm_bts *bts = lchan->ts->trx->bts;
 
-	/* we have to compensate for the "RTS advance" due to the asynchronous interface between
-	 * the BTS (LAPDm) and the PHY/L1 (OsmoTRX or DSP in case of osmo-bts-{sysmo,lc15,oc2g,octphy} */
-	int32_t fn_advance = bts_get_avg_fn_advance(bts);
-	int32_t fn_advance_us = fn_advance * 4615;
-	int fn_advance_ms = fn_advance_us / 1000;
-
-	t200_ms_acch[DL_SAPI0] = bts->t200_ms[T200_SACCH_SDCCH] + fn_advance_ms;
-	t200_ms_acch[DL_SAPI3] = bts->t200_ms[T200_SACCH_SDCCH] + fn_advance_ms;
-
-	if (lchan->rep_acch_cap.dl_facch_all && lchan_is_tch(lchan)) {
-		t200_ms_acch[DL_SAPI0] *= 2;
-		t200_ms_acch[DL_SAPI3] *= 2;
-	}
-
 	switch (lchan->type) {
 	case GSM_LCHAN_SDCCH:
-		t200_ms_dcch[DL_SAPI0] = bts->t200_ms[T200_SDCCH] + fn_advance_ms;
-		t200_ms_dcch[DL_SAPI3] = bts->t200_ms[T200_SDCCH_SAPI3] + fn_advance_ms;
+		t200_fn_dcch[DL_SAPI0] = bts->t200_fn[T200_SDCCH];
+		t200_fn_dcch[DL_SAPI3] = bts->t200_fn[T200_SDCCH_SAPI3];
+		t200_fn_acch[DL_SAPI0] = bts->t200_fn[T200_SACCH_SDCCH];
+		t200_fn_acch[DL_SAPI3] = bts->t200_fn[T200_SACCH_SDCCH];
 		break;
 	case GSM_LCHAN_TCH_F:
-		t200_ms_dcch[DL_SAPI0] = bts->t200_ms[T200_FACCH_F] + fn_advance_ms;
-		t200_ms_dcch[DL_SAPI3] = bts->t200_ms[T200_FACCH_F] + fn_advance_ms;
+		t200_fn_dcch[DL_SAPI0] = bts->t200_fn[T200_FACCH_F];
+		t200_fn_dcch[DL_SAPI3] = bts->t200_fn[T200_FACCH_F];
+		t200_fn_acch[DL_SAPI0] = bts->t200_fn[T200_SACCH_TCH_SAPI0];
+		t200_fn_acch[DL_SAPI3] = bts->t200_fn[T200_SACCH_TCH_SAPI3];
 		break;
 	case GSM_LCHAN_TCH_H:
-		t200_ms_dcch[DL_SAPI0] = bts->t200_ms[T200_FACCH_H] + fn_advance_ms;
-		t200_ms_dcch[DL_SAPI3] = bts->t200_ms[T200_FACCH_H] + fn_advance_ms;
+		t200_fn_dcch[DL_SAPI0] = bts->t200_fn[T200_FACCH_H];
+		t200_fn_dcch[DL_SAPI3] = bts->t200_fn[T200_FACCH_H];
+		t200_fn_acch[DL_SAPI0] = bts->t200_fn[T200_SACCH_TCH_SAPI0];
+		t200_fn_acch[DL_SAPI3] = bts->t200_fn[T200_SACCH_TCH_SAPI3];
 		break;
 	default:
 		/* Channels such as CCCH don't use lapdm DL, and hence no T200 is needed */
 		return -1;
 	}
+
+	/* Add time of two extra messages frames. */
+	if (lchan->rep_acch_cap.dl_facch_all && lchan_is_tch(lchan)) {
+		t200_fn_acch[DL_SAPI0] += 104 * 2;
+		t200_fn_acch[DL_SAPI3] += 104 * 2;
+	}
+
 	return 0;
 }
 
@@ -130,6 +146,7 @@ void gsm_lchan_init(struct gsm_lchan *lchan, struct gsm_bts_trx_ts *ts, unsigned
 
 	INIT_LLIST_HEAD(&lchan->sapi_cmds);
 	INIT_LLIST_HEAD(&lchan->dl_tch_queue);
+	lchan->dl_tch_queue_len = 0;
 }
 
 void gsm_lchan_name_update(struct gsm_lchan *lchan)
@@ -148,17 +165,17 @@ void gsm_lchan_name_update(struct gsm_lchan *lchan)
 int lchan_init_lapdm(struct gsm_lchan *lchan)
 {
 	struct lapdm_channel *lc = &lchan->lapdm_ch;
-	int t200_ms_dcch[_NR_DL_SAPI], t200_ms_acch[_NR_DL_SAPI];
+	uint32_t t200_fn_dcch[_NR_DL_SAPI], t200_fn_acch[_NR_DL_SAPI];
 
-	if (t200_by_lchan(t200_ms_dcch, t200_ms_acch, lchan) == 0) {
+	if (t200_by_lchan(t200_fn_dcch, t200_fn_acch, lchan) == 0) {
 		LOGPLCHAN(lchan, DLLAPD, LOGL_DEBUG,
-			  "Setting T200 D0=%u, D3=%u, S0=%u, S3=%u (all in ms)\n",
-			  t200_ms_dcch[DL_SAPI0], t200_ms_dcch[DL_SAPI3],
-			  t200_ms_acch[DL_SAPI0], t200_ms_acch[DL_SAPI3]);
-		lapdm_channel_init3(lc, LAPDM_MODE_BTS, t200_ms_dcch, t200_ms_acch, lchan->type,
-				    gsm_lchan_name(lchan));
-		lapdm_channel_set_flags(lc, LAPDM_ENT_F_POLLING_ONLY);
+			  "Setting T200 D0=%u, D3=%u, S0=%u, S3=%u (all in frames)\n",
+			  t200_fn_dcch[DL_SAPI0], t200_fn_dcch[DL_SAPI3],
+			  t200_fn_acch[DL_SAPI0], t200_fn_acch[DL_SAPI3]);
+		lapdm_channel_init3(lc, LAPDM_MODE_BTS, NULL, NULL, lchan->type, gsm_lchan_name(lchan));
+		lapdm_channel_set_flags(lc, LAPDM_ENT_F_POLLING_ONLY | LAPDM_ENT_F_RTS);
 		lapdm_channel_set_l1(lc, NULL, lchan);
+		lapdm_channel_set_t200_fn(lc, t200_fn_dcch, t200_fn_acch);
 	}
 	/* We still need to set Rx callback to receive RACH requests: */
 	lapdm_channel_set_l3(lc, lapdm_rll_tx_cb, lchan);
@@ -200,10 +217,12 @@ void gsm_lchan_release(struct gsm_lchan *lchan, enum lchan_rel_act_kind rel_kind
 		rsl_tx_ipac_dlcx_ind(lchan, RSL_ERR_NORMAL_UNSPEC);
 		osmo_rtp_socket_log_stats(lchan->abis_ip.rtp_socket, DRTP, LOGL_INFO,
 			"Closing RTP socket on Channel Release ");
-		osmo_rtp_socket_free(lchan->abis_ip.rtp_socket);
-		lchan->abis_ip.rtp_socket = NULL;
-		msgb_queue_flush(&lchan->dl_tch_queue);
+		lchan_rtp_socket_free(lchan);
+	} else if (lchan->abis_ip.osmux.use) {
+		lchan_osmux_release(lchan);
 	}
+	/* reset all Abis related config: */
+	memset(&lchan->abis_ip, 0, sizeof(lchan->abis_ip));
 
 	/* FIXME: right now we allow creating the rtp_socket even if chan is not
 	 * activated... Once we check for that, we can move this check at the
@@ -211,8 +230,11 @@ void gsm_lchan_release(struct gsm_lchan *lchan, enum lchan_rel_act_kind rel_kind
 	if (lchan->state == LCHAN_S_NONE)
 		return;
 
-	/* release handover state */
+	/* release handover, listener and talker states */
 	handover_reset(lchan);
+	vgcs_talker_reset(lchan, false);
+	vgcs_listener_reset(lchan);
+	vgcs_uplink_free_reset(lchan);
 
 	lchan->rel_act_kind = rel_kind;
 
@@ -317,7 +339,7 @@ void lchan_set_state(struct gsm_lchan *lchan, enum gsm_lchan_state state)
 	}
 }
 
-/* See Table 10.5.25 of GSM04.08 */
+/* See 3GPP TS 44.018 Table 10.5.2.5.1 "Channel Description information element" */
 static uint8_t gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan,
 			  uint8_t ts_nr, uint8_t lchan_nr)
 {
@@ -362,13 +384,13 @@ static uint8_t gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan,
 		cbits = ABIS_RSL_CHAN_NR_CBITS_BCCH;
 		break;
 	case GSM_PCHAN_NONE:
-		LOGP(DRSL, LOGL_ERROR, "Physical channel %s not expected!\n",
-		     gsm_pchan_name(pchan));
-		cbits = 0x00;
+		LOGP(DRSL, LOGL_ERROR, "ts=%u,ss=%u Physical channel %s not expected!\n",
+		     ts_nr, lchan_nr, gsm_pchan_name(pchan));
+		cbits = 0x00; /* Reserved */
 		break;
 	default:
-		LOGP(DRSL, LOGL_ERROR, "Physical channel %s (0x%02x) not expected!\n",
-		     gsm_pchan_name(pchan), (int)pchan);
+		LOGP(DRSL, LOGL_ERROR, "ts=%u,ss=%u Physical channel %s (0x%02x) not expected!\n",
+		     ts_nr, lchan_nr, gsm_pchan_name(pchan), (int)pchan);
 		OSMO_ASSERT(0);
 		break;
 	}
@@ -510,3 +532,148 @@ int lchan2ecu_codec(const struct gsm_lchan *lchan)
 		return -1;
 	}
 }
+
+static int bind_rtp(struct gsm_bts *bts, struct osmo_rtp_socket *rs, const char *ip)
+{
+	int rc;
+	unsigned int i;
+	unsigned int tries;
+
+	tries = (bts->rtp_port_range_end - bts->rtp_port_range_start) / 2;
+	for (i = 0; i < tries; i++) {
+
+		if (bts->rtp_port_range_next >= bts->rtp_port_range_end)
+			bts->rtp_port_range_next = bts->rtp_port_range_start;
+
+		rc = osmo_rtp_socket_bind(rs, ip, bts->rtp_port_range_next);
+
+		bts->rtp_port_range_next += 2;
+
+		if (rc != 0)
+			continue;
+
+		if (bts->rtp_ip_dscp != -1) {
+			if (osmo_rtp_socket_set_dscp(rs, bts->rtp_ip_dscp))
+				LOGP(DRSL, LOGL_ERROR, "failed to set DSCP=%d: %s\n",
+					bts->rtp_ip_dscp, strerror(errno));
+		}
+		if (bts->rtp_priority != -1) {
+			if (osmo_rtp_socket_set_priority(rs, bts->rtp_priority))
+				LOGP(DRSL, LOGL_ERROR, "failed to set socket priority %d: %s\n",
+					bts->rtp_priority, strerror(errno));
+		}
+		return 0;
+	}
+
+	return -1;
+}
+
+int lchan_rtp_socket_create(struct gsm_lchan *lchan, const char *bind_ip)
+{
+	struct gsm_bts *bts = lchan->ts->trx->bts;
+	char cname[256+4];
+	int rc;
+
+	if (lchan->abis_ip.rtp_socket) {
+		LOGPLCHAN(lchan, DRSL, LOGL_ERROR, "Rx RSL IPAC CRCX, "
+			  "but we already have socket!\n");
+		return -EALREADY;
+	}
+
+	/* FIXME: select default value depending on speech_mode */
+	//if (!payload_type)
+	lchan->tch.last_fn = LCHAN_FN_DUMMY;
+	lchan->abis_ip.rtp_socket = osmo_rtp_socket_create(lchan->ts->trx,
+							OSMO_RTP_F_POLL);
+
+	if (!lchan->abis_ip.rtp_socket) {
+		LOGPLCHAN(lchan, DRTP, LOGL_ERROR, "IPAC Failed to create RTP/RTCP sockets\n");
+		oml_tx_failure_event_rep(&lchan->ts->trx->mo,
+					 NM_SEVER_MINOR, OSMO_EVT_CRIT_RTP_TOUT,
+					 "%s IPAC Failed to create RTP/RTCP sockets",
+					 gsm_lchan_name(lchan));
+		return -ENOTCONN;
+	}
+
+	rc = osmo_rtp_socket_set_param(lchan->abis_ip.rtp_socket,
+				       bts->rtp_jitter_adaptive ?
+				       OSMO_RTP_P_JIT_ADAP :
+				       OSMO_RTP_P_JITBUF,
+				       bts->rtp_jitter_buf_ms);
+	if (rc < 0)
+		LOGPLCHAN(lchan, DRTP, LOGL_ERROR,
+			  "IPAC Failed to set RTP socket parameters: %s\n", strerror(-rc));
+	else
+		LOGPLCHAN(lchan, DRTP, LOGL_INFO, "IPAC set RTP socket parameters: %d\n", rc);
+
+	lchan->abis_ip.rtp_socket->priv = lchan;
+	lchan->abis_ip.rtp_socket->rx_cb = &l1sap_rtp_rx_cb;
+
+	rc = bind_rtp(bts, lchan->abis_ip.rtp_socket, bind_ip);
+	if (rc < 0) {
+		LOGPLCHAN(lchan, DRTP, LOGL_ERROR, "IPAC Failed to bind RTP/RTCP sockets\n");
+		oml_tx_failure_event_rep(&lchan->ts->trx->mo,
+					 NM_SEVER_MINOR, OSMO_EVT_CRIT_RTP_TOUT,
+					 "%s IPAC Failed to bind RTP/RTCP sockets",
+					 gsm_lchan_name(lchan));
+		lchan_rtp_socket_free(lchan);
+		return -EBADFD;
+	}
+
+	/* Ensure RTCP SDES contains some useful information */
+	snprintf(cname, sizeof(cname), "bts@%s", bind_ip);
+	osmo_rtp_set_source_desc(lchan->abis_ip.rtp_socket, cname,
+				 gsm_lchan_name(lchan), NULL, NULL,
+				 gsm_trx_unit_id(lchan->ts->trx),
+				 "OsmoBTS-" PACKAGE_VERSION, NULL);
+	/* FIXME: multiplex connection, BSC proxy */
+	return 0;
+}
+
+
+int lchan_rtp_socket_connect(struct gsm_lchan *lchan, const struct in_addr *ia, uint16_t connect_port)
+{
+	int bound_port = 0;
+	int rc;
+
+	rc = osmo_rtp_socket_connect(lchan->abis_ip.rtp_socket,
+				     inet_ntoa(*ia), connect_port);
+	if (rc < 0) {
+		LOGPLCHAN(lchan, DRTP, LOGL_ERROR, "Failed to connect RTP/RTCP sockets\n");
+		return -ECONNREFUSED;
+	}
+	/* save IP address and port number */
+	lchan->abis_ip.connect_ip = ntohl(ia->s_addr);
+	lchan->abis_ip.connect_port = connect_port;
+
+	rc = osmo_rtp_get_bound_ip_port(lchan->abis_ip.rtp_socket,
+					&lchan->abis_ip.bound_ip,
+					&bound_port);
+	if (rc < 0)
+		LOGPLCHAN(lchan, DRTP, LOGL_ERROR, "IPAC cannot obtain locally bound IP/port: %d\n", rc);
+	lchan->abis_ip.bound_port = bound_port;
+	return 0;
+}
+
+void lchan_rtp_socket_free(struct gsm_lchan *lchan)
+{
+	osmo_rtp_socket_free(lchan->abis_ip.rtp_socket);
+	lchan->abis_ip.rtp_socket = NULL;
+	msgb_queue_free(&lchan->dl_tch_queue);
+	lchan->dl_tch_queue_len = 0;
+}
+
+/*! limit number of queue entries to %u; drops any surplus messages */
+void lchan_dl_tch_queue_enqueue(struct gsm_lchan *lchan, struct msgb *msg, unsigned int limit)
+{
+	if (lchan->dl_tch_queue_len > limit) {
+		unsigned int excess = lchan->dl_tch_queue_len - limit;
+		LOGPLCHAN(lchan, DL1P, LOGL_NOTICE, "freeing %d queued frames\n", excess);
+		rate_ctr_add2(lchan->ts->trx->bts->ctrs, BTS_CTR_RTP_RX_DROP_OVERFLOW, excess);
+	}
+	while (lchan->dl_tch_queue_len > limit) {
+		struct msgb *tmp = msgb_dequeue_count(&lchan->dl_tch_queue, &lchan->dl_tch_queue_len);
+		msgb_free(tmp);
+	}
+	msgb_enqueue_count(&lchan->dl_tch_queue, msg, &lchan->dl_tch_queue_len);
+}

src/common/load_indication.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.

src/common/logging.c

@@ -13,7 +13,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -84,17 +84,6 @@ static struct log_info_cat bts_log_info_cat[] = {
 		.loglevel = LOGL_NOTICE,
 		.enabled = 1,
 	},
-	[DABIS] = {
-		.name = "DABIS",
-		.description = "A-bis Intput Subsystem",
-		.enabled = 1, .loglevel = LOGL_NOTICE,
-	},
-	[DRTP] = {
-		.name = "DRTP",
-		.description = "Realtime Transfer Protocol",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 1,
-	},
 	[DPCU] = {
 		.name = "DPCU",
 		.description = "PCU interface",
@@ -119,6 +108,30 @@ static struct log_info_cat bts_log_info_cat[] = {
 		.color = "\033[0;94m",
 		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
+	[DABIS] = {
+		.name = "DABIS",
+		.description = "A-bis Intput Subsystem",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DRTP] = {
+		.name = "DRTP",
+		.description = "Realtime Transfer Protocol",
+		.loglevel = LOGL_NOTICE,
+		.enabled = 1,
+	},
+	[DOSMUX] = {
+		.name = "DOSMUX",
+		.description = "Osmux (Osmocom RTP multiplexing)",
+		.loglevel = LOGL_NOTICE,
+		.enabled = 1,
+	},
+	[DASCI] = {
+		.name = "DASCI",
+		.description = "ASCI (Advanced Speech Call Items: VGCS/VBS)",
+		.loglevel = LOGL_NOTICE,
+		.enabled = 1,
+	},
+
 };
 
 static int osmo_bts_filter_fn(const struct log_context *ctx, struct log_target *tgt)

src/common/main.c

@@ -12,7 +12,7 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * 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/>.
@@ -49,6 +49,7 @@
 #include <osmo-bts/logging.h>
 #include <osmo-bts/abis.h>
 #include <osmo-bts/bts.h>
+#include <osmo-bts/bts_sm.h>
 #include <osmo-bts/vty.h>
 #include <osmo-bts/l1sap.h>
 #include <osmo-bts/bts_model.h>
@@ -233,7 +234,7 @@ static void signal_handler(int signum)
 			oml_tx_failure_event_rep(&g_bts->mo,
 						 NM_SEVER_CRITICAL, OSMO_EVT_CRIT_PROC_STOP,
 						 "BTS: SIGINT received -> shutdown");
-			bts_shutdown(g_bts, "SIGINT");
+			bts_shutdown_ext(g_bts, "SIGINT", true, false);
 		}
 		quit++;
 		break;
@@ -257,25 +258,6 @@ static void signal_handler(int signum)
 	}
 }
 
-static int write_pid_file(char *procname)
-{
-	FILE *outf;
-	char tmp[PATH_MAX+1];
-
-	snprintf(tmp, sizeof(tmp)-1, "/var/run/%s.pid", procname);
-	tmp[PATH_MAX-1] = '\0';
-
-	outf = fopen(tmp, "w");
-	if (!outf)
-		return -1;
-
-	fprintf(outf, "%d\n", getpid());
-
-	fclose(outf);
-
-	return 0;
-}
-
 int bts_main(int argc, char **argv)
 {
 	struct gsm_bts_trx *trx;
@@ -311,7 +293,13 @@ int bts_main(int argc, char **argv)
 	if (vty_test_mode)
 		fprintf(stderr, "--- VTY test mode: not connecting to BSC, not exiting ---\n");
 
-	g_bts = gsm_bts_alloc(tall_bts_ctx, 0);
+	g_bts_sm = gsm_bts_sm_alloc(tall_bts_ctx);
+	if (!g_bts_sm) {
+		fprintf(stderr, "Failed to create BTS Site Manager structure\n");
+		exit(1);
+	}
+
+	g_bts = gsm_bts_alloc(g_bts_sm, 0);
 	if (!g_bts) {
 		fprintf(stderr, "Failed to create BTS structure\n");
 		exit(1);
@@ -358,8 +346,6 @@ int bts_main(int argc, char **argv)
 		}
 	}
 
-	write_pid_file("osmo-bts");
-
 	/* Accept a GSMTAP host from VTY config, but a commandline option overrides that. */
 	if (gsmtap_ip != NULL) {
 		if (g_bts->gsmtap.remote_host != NULL) {
@@ -375,27 +361,26 @@ int bts_main(int argc, char **argv)
 	/* TODO: move this to gsm_bts_alloc() */
 	if (g_bts->gsmtap.remote_host != NULL) {
 		LOGP(DLGLOBAL, LOGL_NOTICE,
-		     "Setting up GSMTAP Um forwarding to '%s:%u'\n",
-		     g_bts->gsmtap.remote_host, GSMTAP_UDP_PORT);
-		g_bts->gsmtap.inst = gsmtap_source_init(g_bts->gsmtap.remote_host,
-							GSMTAP_UDP_PORT, 1);
+		     "Setting up GSMTAP Um forwarding '%s'->'%s:%u'\n",
+		     g_bts->gsmtap.local_host, g_bts->gsmtap.remote_host, GSMTAP_UDP_PORT);
+		g_bts->gsmtap.inst = gsmtap_source_init2(g_bts->gsmtap.local_host, 0,
+							 g_bts->gsmtap.remote_host, GSMTAP_UDP_PORT, 1);
 		if (g_bts->gsmtap.inst == NULL) {
-			fprintf(stderr, "Failed during gsmtap_source_init()\n");
+			fprintf(stderr, "Failed during gsmtap_source_init2()\n");
 			exit(1);
 		}
 		gsmtap_source_add_sink(g_bts->gsmtap.inst);
 	}
 
-	bts_controlif_setup(g_bts, ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_BTS);
+	bts_controlif_setup(g_bts, OSMO_CTRL_PORT_BTS);
 
-	rc = telnet_init_dynif(tall_bts_ctx, NULL, vty_get_bind_addr(),
-			       g_vty_port_num);
+	rc = telnet_init_default(tall_bts_ctx, NULL, g_vty_port_num);
 	if (rc < 0) {
 		fprintf(stderr, "Error initializing telnet\n");
 		exit(1);
 	}
 
-	if (pcu_sock_init(g_bts->pcu.sock_path)) {
+	if (pcu_sock_init(g_bts->pcu.sock_path, g_bts->pcu.sock_wqueue_len_max)) {
 		fprintf(stderr, "PCU L1 socket failed\n");
 		exit(1);
 	}
@@ -407,6 +392,11 @@ int bts_main(int argc, char **argv)
 	signal(SIGUSR2, &signal_handler);
 	osmo_init_ignore_signals();
 
+	if (bts_osmux_open(g_bts) < 0) {
+		fprintf(stderr, "Osmux setup failed\n");
+		exit(1);
+	}
+
 	if (vty_test_mode) {
 		/* Just select-loop without connecting to the BSC, don't exit. This allows running tests on the VTY
 		 * telnet port. */

src/common/measurement.c

@@ -19,7 +19,7 @@
 /* Active TDMA frame subset for TCH/H in DTX mode (see 3GPP TS 45.008 Section 8.3).
  * This mapping is used to determine if a L2 block starting at the given TDMA FN
  * belongs to the SUB set and thus shall always be transmitted in DTX mode. */
-static const uint8_t ts45008_dtx_tchh_fn_map[104] = {
+static const uint8_t ts45008_dtx_tchh_speech_fn_map[104] = {
 	/* TCH/H(0): 0, 2, 4, 6, 52, 54, 56, 58 */
 	[0]  = 1, /* block { 0,  2,  4,  6} */
 	[52] = 1, /* block {52, 54, 56, 58} */
@@ -28,6 +28,15 @@ static const uint8_t ts45008_dtx_tchh_fn_map[104] = {
 	[66] = 1, /* block {66, 68, 70, 72} */
 };
 
+static const uint8_t ts45008_dtx_tchh_data_fn_map[104] = {
+	/* UL TCH/H(0): 52, 54, 56, 58, 60, 62, 65, 67, 69, 71 */
+	[52] = 1, /* block {52, 54, 56, 58, 60, 62} */
+	[60] = 1, /* block {60, 62, 65, 67, 69, 71} */
+	/* UL TCH/H(1): 70, 72, 74, 76, 79, 81, 83, 85, 87, 89 */
+	[70] = 1, /* block {70, 72, 74, 76, 79, 81} */
+	[79] = 1, /* block {79, 81, 83, 85, 87, 89} */
+};
+
 /* In cases where we less measurements than we expect we must assume that we
  * just did not receive the block because it was lost due to bad channel
  * conditions. We set up a dummy measurement result here that reflects the
@@ -50,7 +59,7 @@ bool ts45008_83_is_sub(struct gsm_lchan *lchan, uint32_t fn)
 	uint32_t fn104 = fn % 104;
 
 	/* See TS 45.008 Sections 8.3 and 8.4 for a detailed descriptions of the rules
-	 * implemented here. We only implement the logic for Voice, not CSD */
+	 * implemented here. We implement the logic for both speech and data (CSD). */
 
 	/* AMR is special, SID frames may be scheduled dynamically at any time */
 	if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR)
@@ -59,8 +68,11 @@ bool ts45008_83_is_sub(struct gsm_lchan *lchan, uint32_t fn)
 	switch (lchan->type) {
 	case GSM_LCHAN_TCH_F:
 		switch (lchan->tch_mode) {
+		case GSM48_CMODE_SIGN: /* TCH/F sign: DTX *is* permitted */
 		case GSM48_CMODE_SPEECH_V1:
+		case GSM48_CMODE_SPEECH_V1_VAMOS:
 		case GSM48_CMODE_SPEECH_EFR:
+		case GSM48_CMODE_SPEECH_V2_VAMOS:
 			/* Active TDMA frame subset for TCH/F: 52, 53, 54, 55, 56, 57, 58, 59.
 			 * There is only one *complete* block in this subset starting at FN=52.
 			 * Incomplete blocks {... 52, 53, 54, 55} and {56, 57, 58, 59 ...}
@@ -68,29 +80,38 @@ bool ts45008_83_is_sub(struct gsm_lchan *lchan, uint32_t fn)
 			if (fn104 == 52)
 				return true;
 			break;
-		case GSM48_CMODE_SIGN:
-			/* No DTX allowed; SUB=FULL, therefore measurements at all frame numbers are
-			 * SUB */
-			return true;
+		case GSM48_CMODE_DATA_12k0: /* TCH/F9.6 */
+		case GSM48_CMODE_DATA_6k0: /* TCH/F4.8 */
+			/* FIXME: The RXQUAL_SUB (not RXLEV!) report shall include measurements on
+			 * the TDMA frames given in the table of subclause 8.3 only if L2 fill frames
+			 * have been received as FACCH/F frames at the corresponding frame positions. */
 		default:
-			LOGPFN(DMEAS, LOGL_ERROR, fn, "%s: Unsupported lchan->tch_mode %u\n",
-				gsm_lchan_name(lchan), lchan->tch_mode);
+			if (lchan->rsl_cmode == RSL_CMOD_SPD_DATA)
+				return fn104 == 52;
+			LOGPLCFN(lchan, fn, DMEAS, LOGL_ERROR, "Unsupported lchan->tch_mode %u\n", lchan->tch_mode);
 			break;
 		}
 		break;
 	case GSM_LCHAN_TCH_H:
 		switch (lchan->tch_mode) {
 		case GSM48_CMODE_SPEECH_V1:
-			if (ts45008_dtx_tchh_fn_map[fn104])
+		case GSM48_CMODE_SPEECH_V1_VAMOS:
+			if (ts45008_dtx_tchh_speech_fn_map[fn104])
 				return true;
 			break;
 		case GSM48_CMODE_SIGN:
 			/* No DTX allowed; SUB=FULL, therefore measurements at all frame numbers are
 			 * SUB */
 			return true;
+		case GSM48_CMODE_DATA_6k0: /* TCH/H4.8 */
+		case GSM48_CMODE_DATA_3k6: /* TCH/H2.4 */
+			/* FIXME: The RXQUAL_SUB (not RXLEV!) report shall include measurements on
+			 * the TDMA frames given in the table of subclause 8.3 only if L2 fill frames
+			 * have been received as FACCH/H frames at the corresponding frame positions. */
 		default:
-			LOGPFN(DMEAS, LOGL_ERROR, fn, "%s: Unsupported lchan->tch_mode %u\n",
-				gsm_lchan_name(lchan), lchan->tch_mode);
+			if (lchan->rsl_cmode == RSL_CMOD_SPD_DATA)
+				return ts45008_dtx_tchh_data_fn_map[fn104] == 1;
+			LOGPLCFN(lchan, fn, DMEAS, LOGL_ERROR, "Unsupported lchan->tch_mode %u\n", lchan->tch_mode);
 			break;
 		}
 		break;
@@ -269,9 +290,8 @@ int is_meas_complete(struct gsm_lchan *lchan, uint32_t fn)
 	}
 
 	if (rc == 1) {
-		DEBUGP(DMEAS,
-		       "%s meas period end fn:%u, fn_mod:%i, status:%d, pchan:%s\n",
-		       gsm_lchan_name(lchan), fn, fn_mod, rc, gsm_pchan_name(pchan));
+		LOGPLCFN(lchan, fn, DMEAS, LOGL_DEBUG, "meas period end fn_mod:%d, status:%d, pchan:%s\n", fn_mod,
+			 rc, gsm_pchan_name(pchan));
 	}
 
 	return rc;
@@ -307,16 +327,15 @@ int lchan_new_ul_meas(struct gsm_lchan *lchan,
 	struct bts_ul_meas *dest;
 
 	if (lchan->state != LCHAN_S_ACTIVE) {
-		LOGPFN(DMEAS, LOGL_NOTICE, fn,
-		       "%s measurement during state: %s, num_ul_meas=%d, fn_mod=%u\n",
-		       gsm_lchan_name(lchan), gsm_lchans_name(lchan->state),
-		       lchan->meas.num_ul_meas, fn_mod);
+		LOGPLCFN(lchan, fn, DMEAS, LOGL_NOTICE,
+			 "measurement during state: %s, num_ul_meas=%d, fn_mod=%u\n",
+			 gsm_lchans_name(lchan->state), lchan->meas.num_ul_meas, fn_mod);
 	}
 
 	if (lchan->meas.num_ul_meas >= ARRAY_SIZE(lchan->meas.uplink)) {
-		LOGPFN(DMEAS, LOGL_NOTICE, fn,
-		       "%s no space for uplink measurement, num_ul_meas=%d, fn_mod=%u\n",
-		       gsm_lchan_name(lchan), lchan->meas.num_ul_meas, fn_mod);
+		LOGPLCFN(lchan, fn, DMEAS, LOGL_NOTICE,
+			 "no space for uplink measurement, num_ul_meas=%d, fn_mod=%u\n", lchan->meas.num_ul_meas,
+			 fn_mod);
 		return -ENOSPC;
 	}
 
@@ -328,10 +347,9 @@ int lchan_new_ul_meas(struct gsm_lchan *lchan,
 	if (!ulm->is_sub)
 		dest->is_sub = ts45008_83_is_sub(lchan, fn);
 
-	DEBUGPFN(DMEAS, fn, "%s adding a %s measurement (ber10k=%u, ta_offs=%d, ci_cB=%d, rssi=-%u), num_ul_meas=%d, fn_mod=%u\n",
-		 gsm_lchan_name(lchan),
-		 dest->is_sub ? "SUB" : "FULL",
-		 ulm->ber10k, ulm->ta_offs_256bits, ulm->ci_cb, ulm->inv_rssi,
+	LOGPLCFN(lchan, fn, DMEAS, LOGL_DEBUG,
+		 "adding a %s measurement (ber10k=%u, ta_offs=%d, ci_cB=%d, rssi=-%u), num_ul_meas=%d, fn_mod=%u\n",
+		 dest->is_sub ? "SUB" : "FULL", ulm->ber10k, ulm->ta_offs_256bits, ulm->ci_cb, ulm->inv_rssi,
 		 lchan->meas.num_ul_meas, fn_mod);
 
 	lchan->meas.last_fn = fn;
@@ -406,32 +424,50 @@ static unsigned int lchan_meas_num_expected(const struct gsm_lchan *lchan)
 }
 
 /* In DTX a subset of blocks must always be transmitted
- * See also: GSM 05.08, chapter 8.3 Aspects of discontinuous transmission (DTX) */
-static unsigned int lchan_meas_sub_num_expected(const struct gsm_lchan *lchan)
+ * See also: GSM 05.08, chapter 8.3 Aspects of discontinuous transmission (DTX)
+ * Return value N: (N < 0) -- at least N SUB frames expected;
+ *                 (N > 0) -- exactly N SUB frames expected;
+ *                 (N == 0) - unknown channel type/mode? */
+static int lchan_meas_sub_num_expected(const struct gsm_lchan *lchan)
 {
 	enum gsm_phys_chan_config pchan = ts_pchan(lchan->ts);
 
-	/* AMR is using a more elaborated model with a dymanic amount of
-	 * DTX blocks so this function is not applicable to determine the
-	 * amount of expected SUB Measurements when AMR is used */
-	OSMO_ASSERT(lchan->tch_mode != GSM48_CMODE_SPEECH_AMR);
-
 	switch (pchan) {
 	case GSM_PCHAN_TCH_F:
-		if (lchan->tch_mode == GSM48_CMODE_SIGN) {
-			/* 1 block SACCH, 24 blocks TCH (see note 1) */
-			return 25;
-		} else {
-			/* 1 block SACCH, 1 block TCH */
-			return 2;
+		if (lchan->rsl_cmode == RSL_CMOD_SPD_DATA)
+			return 1 + 1; /* 1 x SACCH + 1 x FACCH */
+		/* else: signalling or speech */
+		switch (lchan->tch_mode) {
+		case GSM48_CMODE_SIGN: /* TCH/F sign: DTX *is* permitted */
+		case GSM48_CMODE_SPEECH_V1: /* TCH/FS */
+		case GSM48_CMODE_SPEECH_V1_VAMOS:
+		case GSM48_CMODE_SPEECH_EFR: /* TCH/EFS */
+		case GSM48_CMODE_SPEECH_V2_VAMOS:
+			return 1 + 1; /* 1 x SACCH + 1 x TCH */
+		case GSM48_CMODE_SPEECH_AMR: /* TCH/AFS */
+		case GSM48_CMODE_SPEECH_V3_VAMOS:
+		case GSM48_CMODE_SPEECH_V4: /* O-TCH/WFS */
+		case GSM48_CMODE_SPEECH_V5: /* TCH/WFS */
+		case GSM48_CMODE_SPEECH_V5_VAMOS:
+		default:
+			return -1; /* at least 1 x SACCH + M x TCH (variable) */
 		}
 	case GSM_PCHAN_TCH_H:
-		if (lchan->tch_mode == GSM48_CMODE_SIGN) {
-			/* 1 block SACCH, 12 blocks TCH (see ynote 1) */
-			return 13;
-		} else {
-			/* 1 block SACCH, 2 blocks TCH */
-			return 3;
+		if (lchan->rsl_cmode == RSL_CMOD_SPD_DATA)
+			return 1 + 2; /* 1 x SACCH + 2 x FACCH */
+		/* else: signalling or speech */
+		switch (lchan->tch_mode) {
+		case GSM48_CMODE_SIGN: /* TCH/H sign: DTX *is not* permitted */
+			return 1 + 12; /* 1 x SACCH + 12 x TCH */
+		case GSM48_CMODE_SPEECH_V1:
+		case GSM48_CMODE_SPEECH_V1_VAMOS:
+			return 1 + 2; /* 1 x SACCH + 2 x TCH */
+		case GSM48_CMODE_SPEECH_AMR: /* TCH/AHS */
+		case GSM48_CMODE_SPEECH_V3_VAMOS:
+		case GSM48_CMODE_SPEECH_V4: /* O-TCH/WHS */
+		case GSM48_CMODE_SPEECH_V6: /* O-TCH/AHS */
+		default:
+			return -1; /* at least 1 x SACCH + M x TCH (variable) */
 		}
 	case GSM_PCHAN_SDCCH8_SACCH8C:
 	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
@@ -444,8 +480,6 @@ static unsigned int lchan_meas_sub_num_expected(const struct gsm_lchan *lchan)
 	default:
 		return 0;
 	}
-
-	/* Note 1: In signalling mode all blocks count as SUB blocks. */
 }
 
 /* if we clip the TOA value to 12 bits, i.e. toa256=3200,
@@ -551,7 +585,7 @@ int lchan_meas_check_compute(struct gsm_lchan *lchan, uint32_t fn)
 	unsigned int num_meas_sub = 0;
 	unsigned int num_meas_sub_actual = 0;
 	unsigned int num_meas_sub_subst = 0;
-	unsigned int num_meas_sub_expect;
+	int num_meas_sub_expect;
 	unsigned int num_ul_meas;
 	unsigned int num_ul_meas_actual = 0;
 	unsigned int num_ul_meas_subst = 0;
@@ -571,16 +605,7 @@ int lchan_meas_check_compute(struct gsm_lchan *lchan, uint32_t fn)
 	 * intentionally to save energy. It is not necessarly an error
 	 * when we get less measurements as we expect. */
 	num_ul_meas_expect = lchan_meas_num_expected(lchan);
-
-	if (lchan->tch_mode != GSM48_CMODE_SPEECH_AMR)
-		num_meas_sub_expect = lchan_meas_sub_num_expected(lchan);
-	else {
-		/* When AMR is used, we expect at least one SUB frame, since
-		 * the SACCH will always be SUB frame. There may occur more
-		 * SUB frames but since DTX periods in AMR are dynamic, we
-		 * can not know how many exactly. */
-		num_meas_sub_expect = 1;
-	}
+	num_meas_sub_expect = lchan_meas_sub_num_expected(lchan);
 
 	if (lchan->meas.num_ul_meas > num_ul_meas_expect)
 		num_ul_meas_excess = lchan->meas.num_ul_meas - num_ul_meas_expect;
@@ -626,12 +651,9 @@ int lchan_meas_check_compute(struct gsm_lchan *lchan, uint32_t fn)
 		} else {
 			m = &measurement_dummy;
 
-			/* For AMR the amount of SUB frames is defined by the
-			 * the occurrence of DTX periods, which are dynamically
-			 * negotiated in AMR, so we can not know if and how many
-			 * SUB frames are missing. */
-			if (lchan->tch_mode != GSM48_CMODE_SPEECH_AMR) {
-				if (num_meas_sub <= i) {
+			/* only if we know the exact number of SUB measurements */
+			if (num_meas_sub_expect >= 0) {
+				if (num_meas_sub < num_meas_sub_expect) {
 					num_meas_sub_subst++;
 					is_sub = true;
 				}
@@ -647,16 +669,6 @@ int lchan_meas_check_compute(struct gsm_lchan *lchan, uint32_t fn)
 		}
 	}
 
-	if (lchan->tch_mode != GSM48_CMODE_SPEECH_AMR) {
-		LOGPLCHAN(lchan, DMEAS, LOGL_DEBUG,
-			  "Received UL measurements contain %u SUB measurements, expected %u\n",
-			  num_meas_sub_actual, num_meas_sub_expect);
-	} else {
-		LOGPLCHAN(lchan, DMEAS, LOGL_DEBUG,
-			  "Received UL measurements contain %u SUB measurements, expected at least %u\n",
-			  num_meas_sub_actual, num_meas_sub_expect);
-	}
-
 	LOGPLCHAN(lchan, DMEAS, LOGL_DEBUG, "Replaced %u measurements with dummy values, "
 		  "from which %u were SUB measurements\n", num_ul_meas_subst, num_meas_sub_subst);
 
@@ -667,17 +679,24 @@ int lchan_meas_check_compute(struct gsm_lchan *lchan, uint32_t fn)
 	 * above only adds missing measurements during the calculation
 	 * it can not remove excess SUB measurements or add missing SUB
 	 * measurements when there is no more room in the interval. */
-	if (lchan->tch_mode != GSM48_CMODE_SPEECH_AMR) {
-		if (num_meas_sub != num_meas_sub_expect) {
+	if (num_meas_sub_expect < 0) {
+		num_meas_sub_expect = -num_meas_sub_expect;
+		LOGPLCHAN(lchan, DMEAS, LOGL_DEBUG,
+			  "Received UL measurements contain %u SUB measurements, expected at least %d\n",
+			  num_meas_sub_actual, num_meas_sub_expect);
+		if (OSMO_UNLIKELY(num_meas_sub < num_meas_sub_expect)) {
 			LOGPLCHAN(lchan, DMEAS, LOGL_ERROR,
 				  "Incorrect number of SUB measurements detected! "
-				  "(%u vs exp %u)\n", num_meas_sub, num_meas_sub_expect);
+				  "(%u vs exp >=%d)\n", num_meas_sub, num_meas_sub_expect);
 		}
 	} else {
-		if (num_meas_sub < num_meas_sub_expect) {
+		LOGPLCHAN(lchan, DMEAS, LOGL_DEBUG,
+			  "Received UL measurements contain %u SUB measurements, expected %d\n",
+			  num_meas_sub_actual, num_meas_sub_expect);
+		if (OSMO_UNLIKELY(num_meas_sub != num_meas_sub_expect)) {
 			LOGPLCHAN(lchan, DMEAS, LOGL_ERROR,
 				  "Incorrect number of SUB measurements detected! "
-				  "(%u vs exp >=%u)\n", num_meas_sub, num_meas_sub_expect);
+				  "(%u vs exp %d)\n", num_meas_sub, num_meas_sub_expect);
 		}
 	}
 
@@ -916,6 +935,8 @@ void lchan_meas_handle_sacch(struct gsm_lchan *lchan, struct msgb *msg)
 	uint8_t ms_ta;
 	int8_t ul_rssi;
 	int16_t ul_ci_cb;
+	uint8_t *l3;
+	unsigned int l3_len;
 
 	if (msgb_l2len(msg) == GSM_MACBLOCK_LEN) {
 		/* Some brilliant engineer decided that the ordering of
@@ -945,7 +966,9 @@ void lchan_meas_handle_sacch(struct gsm_lchan *lchan, struct msgb *msg)
 	}
 
 	timing_offset = ms_to_valid(lchan) ? ms_to2rsl(lchan, ms_ta) : -1;
-	rc = rsl_tx_meas_res(lchan, msgb_l3(msg), msgb_l3len(msg), timing_offset);
+	l3 = msgb_l3(msg);
+	l3_len = l3 ? msgb_l3len(msg) : 0;
+	rc = rsl_tx_meas_res(lchan, l3, l3_len, timing_offset);
 	if (rc == 0) /* Count successful transmissions */
 		lchan->meas.res_nr++;