osmo-mgw: Use libosmocore socket abstraction

There's no need for us to use the sockets API directly:  We have
pretty nice socket helper functions in libosmocore, let's make
use of them.

Change-Id: I39d47b8a27f683060a2facf2dbecff8d00c19ce9

TODO-RELEASE

@@ -23,4 +23,7 @@
 # If any interfaces have been added since the last public release, a++;
 # If any interfaces have been removed or changed since the last public release, a=0.
 #
-#library	what		description / commit summary line
+#library		what		description / commit summary line
+libosmo-mgcp		API/ABI change	parse and represent connection identifiers as hex strings
+libosmo-mgcp		API/ABI change	connection identifiers are assigned by the server, not CA
+libosmo-mgcp-client	API/ABI change	parse and store connection identifier in response

configure.ac

@@ -40,9 +40,22 @@ AC_SUBST(LIBRARY_DL)
 
 
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 0.10.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 0.10.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 0.10.0)
 PKG_CHECK_MODULES(LIBOSMONETIF, libosmo-netif >= 0.1.0)
 
+AC_ARG_ENABLE(sanitize,
+	[AS_HELP_STRING(
+		[--enable-sanitize],
+		[Compile with address sanitizer enabled],
+	)],
+	[sanitize=$enableval], [sanitize="no"])
+if test x"$sanitize" = x"yes"
+then
+	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
+	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
+fi
+
 # Enable/disable transcoding within osmo-bsc_mgcp?
 AC_ARG_ENABLE([mgcp-transcoding], [AS_HELP_STRING([--enable-mgcp-transcoding], [Build the MGCP gateway with internal transcoding enabled.])],
     [osmo_ac_mgcp_transcoding="$enableval"],[osmo_ac_mgcp_transcoding="no"])

contrib/systemd/osmo-mgw.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Osmocom Media Gateway (MGW)
+
+[Service]
+Type=simple
+Restart=always
+ExecStart=/usr/bin/osmo-mgw -s -c /etc/osmocom/osmo-mgw.cfg
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target

debian/control

@@ -16,7 +16,7 @@ Homepage: https://osmocom.org/projects/osmo-mgw
 Package: osmo-mgw
 Architecture: any
 Multi-Arch: foreign
-Depends: libosmo-mgcp0, ${misc:Depends}, ${shlibs:Depends}
+Depends: libosmo-mgcp1, ${misc:Depends}, ${shlibs:Depends}
 Description: OsmoMGW: Osmocom's Media Gateway for 2G and 3G circuit-switched mobile networks
 
 Package: libosmo-mgcp1

debian/osmo-mgw.service

@@ -0,0 +1 @@
+../contrib/systemd/osmo-mgw.service

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

@@ -2,12 +2,17 @@
 ! MGCP configuration example
 !
 mgcp
- !local ip 10.23.24.2
- !bts ip 10.24.24.1
- !bind ip 10.23.24.1
- bind port 2427
- rtp force-ptime 20
- sdp audio payload number 98
- sdp audio payload name AMR/8000
- number endpoints 31
- no rtcp-omit
+  bind ip 127.0.0.1
+  rtp port-range 4002 16000
+  rtp bind-ip 10.9.1.122
+  rtp ip-probing
+  rtp ip-tos 184
+  bind port 2427
+  sdp audio payload number 98
+  sdp audio payload name GSM
+  number endpoints 31
+  loop 0
+  force-realloc 1
+  rtcp-omit
+  rtp-patch ssrc
+  rtp-patch timestamp

include/osmocom/mgcp/mgcp.h

@@ -151,6 +151,7 @@ struct mgcp_trunk_config {
 	int rtp_accept_all;
 
 	unsigned int number_endpoints;
+	int vty_number_endpoints;
 	struct mgcp_endpoint *endpoints;
 };
 

include/osmocom/mgcp/mgcp_common.h

@@ -68,4 +68,8 @@ static inline int mgcp_msg_terminate_nul(struct msgb *msg)
 	return 0;
 }
 
+/* String length of Connection Identifiers
+ * (see also RFC3435 2.1.3.2 Names of Connections) */
+#define MGCP_CONN_ID_LENGTH 32+1
+
 #endif

include/osmocom/mgcp/mgcp_conn.h

@@ -28,12 +28,11 @@
 #include <inttypes.h>
 
 struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
-				  uint32_t id, enum mgcp_conn_type type,
-				  char *name);
-struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, uint32_t id);
+				  enum mgcp_conn_type type, char *name);
+struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, const char *id);
 struct mgcp_conn_rtp *mgcp_conn_get_rtp(struct mgcp_endpoint *endp,
-					uint32_t id);
-void mgcp_conn_free(struct mgcp_endpoint *endp, uint32_t id);
+					const char *id);
+void mgcp_conn_free(struct mgcp_endpoint *endp, const char *id);
 void mgcp_conn_free_oldest(struct mgcp_endpoint *endp);
 void mgcp_conn_free_all(struct mgcp_endpoint *endp);
 char *mgcp_conn_dump(struct mgcp_conn *conn);

include/osmocom/mgcp/mgcp_internal.h

@@ -30,8 +30,10 @@
 
 #define CI_UNUSED 0
 
-#define CONN_ID_BTS 0
-#define CONN_ID_NET 1
+/* FIXME: This this is only needed to compile the currently
+ * broken OSMUX support. Remove when fixed */
+#define CONN_ID_BTS "0"
+#define CONN_ID_NET "1"
 
 enum mgcp_trunk_type {
 	MGCP_TRUNK_VIRTUAL,
@@ -203,7 +205,7 @@ struct mgcp_conn {
 	enum mgcp_connection_mode mode_orig;
 
 	/*!< connection id to identify the conntion */
-	uint32_t id;
+	char id[MGCP_CONN_ID_LENGTH];
 
 	/*!< human readable name (vty, logging) */
 	char name[256];

include/osmocom/mgcp/mgcp_msg.h

@@ -43,7 +43,7 @@ int mgcp_check_param(const struct mgcp_endpoint *endp, const char *line);
 
 int mgcp_verify_call_id(struct mgcp_endpoint *endp, const char *callid);
 
-int mgcp_verify_ci(struct mgcp_endpoint *endp, const char *ci);
+int mgcp_verify_ci(struct mgcp_endpoint *endp, const char *conn_id);
 
 char *mgcp_strline(char *str, char **saveptr);
 
@@ -54,5 +54,3 @@ char *mgcp_strline(char *str, char **saveptr);
 #define for_each_non_empty_line(line, save)\
 	for (line = strtok_r(NULL, "\r\n", &save); line;\
 	     line = strtok_r(NULL, "\r\n", &save))
-
-int mgcp_parse_ci(uint32_t *conn_id, const char *ci);

include/osmocom/mgcp_client/mgcp_client.h

@@ -27,9 +27,10 @@ struct mgcp_client_conf {
 typedef unsigned int mgcp_trans_id_t;
 
 struct mgcp_response_head {
-       int response_code;
-       mgcp_trans_id_t trans_id;
-       const char *comment;
+	int response_code;
+	mgcp_trans_id_t trans_id;
+	const char *comment;
+	char conn_id[MGCP_CONN_ID_LENGTH];
 };
 
 struct mgcp_response {
@@ -63,9 +64,9 @@ struct mgcp_msg {
 	uint32_t presence;
 	char endpoint[MGCP_ENDPOINT_MAXLEN];
 	unsigned int call_id;
-	uint32_t conn_id;
-        uint16_t audio_port;
-        char *audio_ip;
+	char *conn_id;
+	uint16_t audio_port;
+	char *audio_ip;
 	enum mgcp_connection_mode conn_mode;
 };
 
@@ -92,6 +93,7 @@ int mgcp_response_parse_params(struct mgcp_response *r);
 
 int mgcp_client_tx(struct mgcp_client *mgcp, struct msgb *msg,
 		   mgcp_response_cb_t response_cb, void *priv);
+int mgcp_client_cancel(struct mgcp_client *mgcp, mgcp_trans_id_t trans_id);
 
 enum mgcp_connection_mode;
 
@@ -110,6 +112,7 @@ struct msgb *mgcp_msg_dlcx(struct mgcp_client *mgcp, uint16_t rtp_endpoint,
 OSMO_DEPRECATED("Use mgcp_msg_gen() instead");
 
 struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg);
+mgcp_trans_id_t mgcp_msg_trans_id(struct msgb *msg);
 
 extern const struct value_string mgcp_client_connection_mode_strs[];
 static inline const char *mgcp_client_cmode_name(enum mgcp_connection_mode mode)

src/libosmo-legacy-mgcp/mgcp_protocol.c

@@ -372,8 +372,8 @@ struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg)
 
 	display_mgcp_message(msg->l2h, msgb_l2len(msg), "Received message");
 
-        /* attempt to treat it as a response */
-        if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) {
+	/* attempt to treat it as a response */
+	if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) {
 		LOGP(DLMGCP, LOGL_DEBUG, "Response: Code: %d\n", code);
 		return NULL;
 	}

src/libosmo-mgcp-client/mgcp_client.c

@@ -24,6 +24,7 @@
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/logging.h>
 #include <osmocom/core/byteswap.h>
+#include <osmocom/core/socket.h>
 
 #include <osmocom/mgcp_client/mgcp_client.h>
 #include <osmocom/mgcp_client/mgcp_client_internal.h>
@@ -133,7 +134,7 @@ static int mgcp_response_parse_head(struct mgcp_response *r, struct msgb *msg)
 
 	r->body = (char *)msg->data;
 
-        if (sscanf(r->body, "%3d %u %n",
+	if (sscanf(r->body, "%3d %u %n",
 		   &r->head.response_code, &r->head.trans_id,
 		   &comment_pos) != 2)
 		goto response_parse_failure;
@@ -176,7 +177,7 @@ static bool mgcp_line_is_valid(const char *line)
 /* Parse a line like "m=audio 16002 RTP/AVP 98" */
 static int mgcp_parse_audio_port(struct mgcp_response *r, const char *line)
 {
-        if (sscanf(line, "m=audio %hu",
+	if (sscanf(line, "m=audio %hu",
 		   &r->audio_port) != 1)
 		goto response_parse_failure;
 
@@ -201,8 +202,7 @@ static int mgcp_parse_audio_ip(struct mgcp_response *r, const char *line)
 		goto response_parse_failure;
 
 	/* Extract IP-Address */
-	strncpy(r->audio_ip, line + 9, sizeof(r->audio_ip));
-	r->audio_ip[sizeof(r->audio_ip) - 1] = '\0';
+	osmo_strlcpy(r->audio_ip, line + 9, sizeof(r->audio_ip));
 
 	/* Check IP-Address */
 	if (inet_aton(r->audio_ip, &ip_test) == 0)
@@ -258,15 +258,65 @@ int mgcp_response_parse_params(struct mgcp_response *r)
 	return 0;
 }
 
+/* Parse a line like "I: 0cedfd5a19542d197af9afe5231f1d61" */
+static int mgcp_parse_conn_id(struct mgcp_response *r, const char *line)
+{
+	if (strlen(line) < 4)
+		goto response_parse_failure;
+
+	if (memcmp("I: ", line, 3) != 0)
+		goto response_parse_failure;
+
+	osmo_strlcpy(r->head.conn_id, line + 3, sizeof(r->head.conn_id));
+	return 0;
+
+response_parse_failure:
+	LOGP(DLMGCP, LOGL_ERROR,
+	     "Failed to parse MGCP response (connectionIdentifier)\n");
+	return -EINVAL;
+}
+
+/* Parse MGCP parameters of the response */
+static int parse_head_params(struct mgcp_response *r)
+{
+	char *line;
+	int rc = 0;
+	OSMO_ASSERT(r->body);
+	char *data = r->body;
+	char *data_end = strstr(r->body, "\n\n");
+
+	/* Protect SDP body, for_each_non_empty_line() will
+	 * only parse until it hits \0 mark. */
+	if (data_end)
+		*data_end = '\0';
+
+	for_each_non_empty_line(line, data) {
+		switch (line[0]) {
+		case 'I':
+			rc = mgcp_parse_conn_id(r, line);
+			if (rc)
+				goto exit;
+			break;
+		default:
+			/* skip unhandled parameters */
+			break;
+		}
+	}
+exit:
+	/* Restore original state */
+	if (data_end)
+		*data_end = '\n';
+
+	return rc;
+}
+
 static struct mgcp_response_pending *mgcp_client_response_pending_get(
 					 struct mgcp_client *mgcp,
-					 struct mgcp_response *r)
+					 mgcp_trans_id_t trans_id)
 {
 	struct mgcp_response_pending *pending;
-	if (!r)
-		return NULL;
 	llist_for_each_entry(pending, &mgcp->responses_pending, entry) {
-		if (pending->trans_id == r->head.trans_id) {
+		if (pending->trans_id == trans_id) {
 			llist_del(&pending->entry);
 			return pending;
 		}
@@ -288,16 +338,22 @@ int mgcp_client_rx(struct mgcp_client *mgcp, struct msgb *msg)
 
 	rc = mgcp_response_parse_head(&r, msg);
 	if (rc) {
-		LOGP(DLMGCP, LOGL_ERROR, "Cannot parse MGCP response\n");
+		LOGP(DLMGCP, LOGL_ERROR, "Cannot parse MGCP response (head)\n");
 		return -1;
 	}
 
-	pending = mgcp_client_response_pending_get(mgcp, &r);
+	rc = parse_head_params(&r);
+	if (rc) {
+		LOGP(DLMGCP, LOGL_ERROR, "Cannot parse MGCP response (head parameters)\n");
+		return -1;
+	}
+
+	pending = mgcp_client_response_pending_get(mgcp, r.head.trans_id);
 	if (!pending) {
 		LOGP(DLMGCP, LOGL_ERROR,
 		     "Cannot find matching MGCP transaction for trans_id %d\n",
 		     r.head.trans_id);
-		return -1;
+		return -ENOENT;
 	}
 
 	mgcp_client_handle_response(mgcp, pending, &r);
@@ -325,7 +381,7 @@ static int mgcp_do_read(struct osmo_fd *fd)
 		LOGP(DLMGCP, LOGL_ERROR, "Too much data: %d\n", ret);
 		msgb_free(msg);
 		return -1;
-        }
+	}
 
 	msg->l2h = msgb_put(msg, ret);
 	ret = mgcp_client_rx(mgcp, msg);
@@ -340,7 +396,7 @@ static int mgcp_do_write(struct osmo_fd *fd, struct msgb *msg)
 	unsigned int l = msg->len < sizeof(strbuf) ? msg->len : sizeof(strbuf);
 	unsigned int i;
 
-	strncpy(strbuf, (const char*)msg->data, l);
+	osmo_strlcpy(strbuf, (const char*)msg->data, l);
 	for (i = 0; i < sizeof(strbuf); i++) {
 		if (strbuf[i] == '\n' || strbuf[i] == '\r') {
 			strbuf[i] = '\0';
@@ -390,7 +446,6 @@ struct mgcp_client *mgcp_client_init(void *ctx,
 
 int mgcp_client_connect(struct mgcp_client *mgcp)
 {
-	int on;
 	struct sockaddr_in addr;
 	struct osmo_wqueue *wq;
 	int rc;
@@ -402,46 +457,19 @@ int mgcp_client_connect(struct mgcp_client *mgcp)
 
 	wq = &mgcp->wq;
 
-	wq->bfd.fd = socket(AF_INET, SOCK_DGRAM, 0);
-	if (wq->bfd.fd < 0) {
-		LOGP(DLMGCP, LOGL_FATAL, "Failed to create UDP socket errno: %d\n", errno);
-		return -errno;
-	}
-
-	on = 1;
-	if (setsockopt(wq->bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
+	rc = osmo_sock_init2_ofd(&wq->bfd, AF_INET, SOCK_DGRAM, IPPROTO_UDP,
+				 mgcp->actual.local_addr, mgcp->actual.local_port,
+				 mgcp->actual.remote_addr, mgcp->actual.remote_port,
+				 OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
+	if (rc < 0) {
 		LOGP(DLMGCP, LOGL_FATAL,
-		     "Failed to initialize socket for MGCP GW: %s\n",
-		     strerror(errno));
-		rc = -errno;
+		     "Failed to initialize socket %s:%u -> %s:%u for MGCP GW: %s\n",
+		     mgcp->actual.local_addr, mgcp->actual.local_port,
+		     mgcp->actual.remote_addr, mgcp->actual.remote_port, strerror(errno));
 		goto error_close_fd;
 	}
 
-	/* bind socket */
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	inet_aton(mgcp->actual.local_addr, &addr.sin_addr);
-	addr.sin_port = htons(mgcp->actual.local_port);
-	if (bind(wq->bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-		LOGP(DLMGCP, LOGL_FATAL,
-		     "Failed to bind for MGCP GW to %s %u\n",
-		     mgcp->actual.local_addr, mgcp->actual.local_port);
-		rc = -errno;
-		goto error_close_fd;
-	}
-
-	/* connect to the remote */
 	inet_aton(mgcp->actual.remote_addr, &addr.sin_addr);
-	addr.sin_port = htons(mgcp->actual.remote_port);
-	if (connect(wq->bfd.fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
-		LOGP(DLMGCP, LOGL_FATAL,
-		     "Failed to connect to MGCP GW at %s %u: %s\n",
-		     mgcp->actual.remote_addr, mgcp->actual.remote_port,
-		     strerror(errno));
-		rc = -errno;
-		goto error_close_fd;
-	}
-
 	mgcp->remote_addr = htonl(addr.sin_addr.s_addr);
 
 	osmo_wqueue_init(wq, 10);
@@ -450,11 +478,6 @@ int mgcp_client_connect(struct mgcp_client *mgcp)
 	wq->read_cb = mgcp_do_read;
 	wq->write_cb = mgcp_do_write;
 
-	if (osmo_fd_register(&wq->bfd) != 0) {
-		LOGP(DLMGCP, LOGL_FATAL, "Failed to register BFD\n");
-		rc = -EIO;
-		goto error_close_fd;
-	}
 	LOGP(DLMGCP, LOGL_INFO, "MGCP GW connection: %s:%u -> %s:%u\n",
 	     mgcp->actual.local_addr, mgcp->actual.local_port,
 	     mgcp->actual.remote_addr, mgcp->actual.remote_port);
@@ -503,7 +526,10 @@ struct mgcp_response_pending * mgcp_client_pending_add(
  * response_cb. NOTE: the response_cb still needs to call
  * mgcp_response_parse_params(response) to get the parsed parameters -- to
  * potentially save some CPU cycles, only the head line has been parsed when
- * the response_cb is invoked. */
+ * the response_cb is invoked.
+ * Before the priv pointer becomes invalid, e.g. due to transaction timeout,
+ * mgcp_client_cancel() needs to be called for this transaction.
+ */
 int mgcp_client_tx(struct mgcp_client *mgcp, struct msgb *msg,
 		   mgcp_response_cb_t response_cb, void *priv)
 {
@@ -546,6 +572,32 @@ mgcp_tx_error:
 	return -1;
 }
 
+/* Cancel a pending transaction.
+ * Should a priv pointer passed to mgcp_client_tx() become invalid, this function must be called. In
+ * practical terms, if the caller of mgcp_client_tx() wishes to tear down a transaction without having
+ * received a response this function must be called. The trans_id can be obtained by calling
+ * mgcp_msg_trans_id() on the msgb produced by mgcp_msg_gen().
+ */
+int mgcp_client_cancel(struct mgcp_client *mgcp, mgcp_trans_id_t trans_id)
+{
+	struct mgcp_response_pending *pending = mgcp_client_response_pending_get(mgcp, trans_id);
+	if (!pending) {
+		/* INFO is sufficient, it is not harmful to cancel a transaction twice. */
+		LOGP(DLMGCP, LOGL_INFO, "Cannot cancel, no such transaction: %u\n", trans_id);
+		return -ENOENT;
+	}
+	LOGP(DLMGCP, LOGL_INFO, "Canceled transaction %u\n", trans_id);
+	talloc_free(pending);
+	return 0;
+	/* We don't really need to clean up the wqueue: In all sane cases, the msgb has already been sent
+	 * out and is no longer in the wqueue. If it still is in the wqueue, then sending MGCP messages
+	 * per se is broken and the program should notice so by a full wqueue. Even if this was called
+	 * before we had a chance to send out the message and it is still going to be sent, we will just
+	 * ignore the reply to it later. Removing a msgb from the wqueue here would just introduce more
+	 * bug surface in terms of failing to update wqueue API's counters or some such.
+	 */
+}
+
 static struct msgb *mgcp_msg_from_buf(mgcp_trans_id_t trans_id,
 				      const char *buf, int len)
 {
@@ -650,7 +702,6 @@ struct msgb *mgcp_msg_dlcx(struct mgcp_client *mgcp, uint16_t rtp_endpoint,
 
 #define MGCP_CRCX_MANDATORY (MGCP_MSG_PRESENCE_ENDPOINT | \
 			     MGCP_MSG_PRESENCE_CALL_ID | \
-			     MGCP_MSG_PRESENCE_CONN_ID | \
 			     MGCP_MSG_PRESENCE_CONN_MODE)
 #define MGCP_MDCX_MANDATORY (MGCP_MSG_PRESENCE_ENDPOINT | \
 			     MGCP_MSG_PRESENCE_CONN_ID)
@@ -706,8 +757,15 @@ struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg)
 	}
 
 	/* Add endpoint name */
-	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_ENDPOINT)
+	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_ENDPOINT) {
+		if (strlen(mgcp_msg->endpoint) <= 0) {
+			LOGP(DLMGCP, LOGL_ERROR,
+			     "Empty endpoint name, can not generate MGCP message\n");
+			msgb_free(msg);
+			return NULL;
+		}
 		rc += msgb_printf(msg, " %s", mgcp_msg->endpoint);
+	}
 
 	/* Add protocol version */
 	rc += msgb_printf(msg, " MGCP 1.0\r\n");
@@ -717,12 +775,18 @@ struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg)
 		rc += msgb_printf(msg, "C: %x\r\n", mgcp_msg->call_id);
 
 	/* Add connection id */
-	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_CONN_ID)
-		rc += msgb_printf(msg, "I: %u\r\n", mgcp_msg->conn_id);
+	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_CONN_ID) {
+		if (strlen(mgcp_msg->conn_id) <= 0) {
+			LOGP(DLMGCP, LOGL_ERROR,
+			     "Empty connection id, can not generate MGCP message\n");
+			msgb_free(msg);
+			return NULL;
+		}
+		rc += msgb_printf(msg, "I: %s\r\n", mgcp_msg->conn_id);
+	}
 
 	/* Add local connection options */
-	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_CONN_ID
-	    && mgcp_msg->verb == MGCP_VERB_CRCX)
+	if (mgcp_msg->verb == MGCP_VERB_CRCX)
 		rc += msgb_printf(msg, "L: p:20, a:AMR, nt:IN\r\n");
 
 	/* Add mode */
@@ -734,6 +798,18 @@ struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg)
 	/* Add RTP address and port (SDP) */
 	if (mgcp_msg->presence & MGCP_MSG_PRESENCE_AUDIO_IP
 	    && mgcp_msg->presence & MGCP_MSG_PRESENCE_AUDIO_PORT) {
+		if (mgcp_msg->audio_port == 0) {
+			LOGP(DLMGCP, LOGL_ERROR,
+			     "Invalid port number, can not generate MGCP message\n");
+			msgb_free(msg);
+			return NULL;
+		}
+		if (strlen(mgcp_msg->audio_ip) <= 0) {
+			LOGP(DLMGCP, LOGL_ERROR,
+			     "Empty ip address, can not generate MGCP message\n");
+			msgb_free(msg);
+			return NULL;
+		}
 		rc += msgb_printf(msg, "\r\n");
 		rc += msgb_printf(msg, "c=IN IP4 %s\r\n", mgcp_msg->audio_ip);
 		rc +=
@@ -751,6 +827,12 @@ struct msgb *mgcp_msg_gen(struct mgcp_client *mgcp, struct mgcp_msg *mgcp_msg)
 	return msg;
 }
 
+/* Retrieve the MGCP transaction ID from a msgb generated by mgcp_msg_gen() */
+mgcp_trans_id_t mgcp_msg_trans_id(struct msgb *msg)
+{
+	return (mgcp_trans_id_t)msg->cb[MSGB_CB_MGCP_TRANS_ID];
+}
+
 struct mgcp_client_conf *mgcp_client_conf_actual(struct mgcp_client *mgcp)
 {
 	return &mgcp->actual;

src/libosmo-mgcp/Makefile.am

@@ -7,6 +7,7 @@ AM_CPPFLAGS = \
 AM_CFLAGS = \
 	-Wall \
 	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOGSM_CFLAGS) \
 	$(LIBOSMOVTY_CFLAGS) \
 	$(LIBOSMONETIF_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
@@ -14,6 +15,7 @@ AM_CFLAGS = \
 
 AM_LDFLAGS = \
 	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBOSMONETIF_LIBS) \
 	$(COVERAGE_LDFLAGS) \

src/libosmo-mgcp/mgcp_conn.c

@@ -25,6 +25,47 @@
 #include <osmocom/mgcp/mgcp_internal.h>
 #include <osmocom/mgcp/mgcp_common.h>
 #include <osmocom/mgcp/mgcp_ep.h>
+#include <osmocom/gsm/gsm_utils.h>
+#include <ctype.h>
+
+/* Allocate a new connection identifier. According to RFC3435, they must
+ * be unique only within the scope of the endpoint. (Caller must provide
+ * memory for id) */
+static int mgcp_alloc_id(struct mgcp_endpoint *endp, char *id)
+{
+	int i;
+	int k;
+	int rc;
+	uint8_t id_bin[16];
+	char *id_hex;
+
+	/* Generate a connection id that is unique for the current endpoint.
+	 * Technically a counter would be sufficient, but in order to
+	 * be able to find a specific connection in large logfiles and to
+	 * prevent unintentional connections we assign the connection
+	 * identifiers randomly from a reasonable large number space */
+	for (i = 0; i < 32; i++) {
+		rc = osmo_get_rand_id(id_bin, sizeof(id_bin));
+		if (rc < 0)
+			return rc;
+
+		id_hex = osmo_hexdump_nospc(id_bin, sizeof(id_bin));
+		for (k = 0; k < strlen(id_hex); k++)
+			id_hex[k] = toupper(id_hex[k]);
+
+		/* ensure that the generated conn_id is unique
+		 * for this endpoint */
+		if (!mgcp_conn_get_rtp(endp, id_hex)) {
+			osmo_strlcpy(id, id_hex, MGCP_CONN_ID_LENGTH);
+			return 0;
+		}
+	}
+
+	LOGP(DLMGCP, LOGL_ERROR, "endpoint:0x%x, unable to generate a unique connectionIdentifier\n",
+	     ENDPOINT_NUMBER(endp));
+
+	return -1;
+}
 
 /* Reset codec state and free memory */
 static void mgcp_rtp_codec_reset(struct mgcp_rtp_codec *codec)
@@ -78,22 +119,15 @@ static void mgcp_rtp_conn_reset(struct mgcp_conn_rtp *conn)
  *  \param[in] type connection type (e.g. MGCP_CONN_TYPE_RTP)
  *  \returns pointer to allocated connection, NULL on error */
 struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
-				  uint32_t id, enum mgcp_conn_type type,
-				  char *name)
+				  enum mgcp_conn_type type, char *name)
 {
 	struct mgcp_conn *conn;
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-	OSMO_ASSERT(strlen(name) < sizeof(conn->name));
+	int rc;
 
 	/* Do not allow more then two connections */
 	if (llist_count(&endp->conns) >= endp->type->max_conns)
 		return NULL;
 
-	/* Prevent duplicate connection IDs */
-	if (mgcp_conn_get(endp, id))
-		return NULL;
-
 	/* Create new connection and add it to the list */
 	conn = talloc_zero(ctx, struct mgcp_conn);
 	if (!conn)
@@ -102,9 +136,13 @@ struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
 	conn->type = type;
 	conn->mode = MGCP_CONN_NONE;
 	conn->mode_orig = MGCP_CONN_NONE;
-	conn->id = id;
 	conn->u.rtp.conn = conn;
-	strcpy(conn->name, name);
+	osmo_strlcpy(conn->name, name, sizeof(conn->name));
+	rc = mgcp_alloc_id(endp, conn->id);
+	if (rc < 0) {
+		talloc_free(conn);
+		return NULL;
+	}
 
 	switch (type) {
 	case MGCP_CONN_TYPE_RTP:
@@ -126,15 +164,12 @@ struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
  *  \param[in] endp associated endpoint
  *  \param[in] id identification number of the connection
  *  \returns pointer to allocated connection, NULL if not found */
-struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, uint32_t id)
+struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, const char *id)
 {
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-
 	struct mgcp_conn *conn;
 
 	llist_for_each_entry(conn, &endp->conns, entry) {
-		if (conn->id == id)
+		if (strncmp(conn->id, id, sizeof(conn->id)) == 0)
 			return conn;
 	}
 
@@ -145,11 +180,9 @@ struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, uint32_t id)
  *  \param[in] endp associated endpoint
  *  \param[in] id identification number of the connection
  *  \returns pointer to allocated connection, NULL if not found */
-struct mgcp_conn_rtp *mgcp_conn_get_rtp(struct mgcp_endpoint *endp, uint32_t id)
+struct mgcp_conn_rtp *mgcp_conn_get_rtp(struct mgcp_endpoint *endp,
+					const char *id)
 {
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-
 	struct mgcp_conn *conn;
 
 	conn = mgcp_conn_get(endp, id);
@@ -165,11 +198,8 @@ struct mgcp_conn_rtp *mgcp_conn_get_rtp(struct mgcp_endpoint *endp, uint32_t id)
 /*! free a connection by its ID.
  *  \param[in] endp associated endpoint
  *  \param[in] id identification number of the connection */
-void mgcp_conn_free(struct mgcp_endpoint *endp, uint32_t id)
+void mgcp_conn_free(struct mgcp_endpoint *endp, const char *id)
 {
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-
 	struct mgcp_conn *conn;
 
 	conn = mgcp_conn_get(endp, id);
@@ -197,9 +227,6 @@ void mgcp_conn_free(struct mgcp_endpoint *endp, uint32_t id)
  *  \param[in] endp associated endpoint */
 void mgcp_conn_free_oldest(struct mgcp_endpoint *endp)
 {
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-
 	struct mgcp_conn *conn;
 
 	if (llist_empty(&endp->conns))
@@ -216,9 +243,6 @@ void mgcp_conn_free_oldest(struct mgcp_endpoint *endp)
  *  \param[in] endp associated endpoint */
 void mgcp_conn_free_all(struct mgcp_endpoint *endp)
 {
-	OSMO_ASSERT(endp);
-	OSMO_ASSERT(endp->conns.next != NULL && endp->conns.prev != NULL);
-
 	struct mgcp_conn *conn;
 	struct mgcp_conn *conn_tmp;
 
@@ -235,7 +259,7 @@ void mgcp_conn_free_all(struct mgcp_endpoint *endp)
  *  \returns human readble string */
 char *mgcp_conn_dump(struct mgcp_conn *conn)
 {
-	static char str[256];
+	static char str[sizeof(conn->name)+sizeof(conn->id)+256];
 
 	if (!conn) {
 		snprintf(str, sizeof(str), "(null connection)");
@@ -245,7 +269,7 @@ char *mgcp_conn_dump(struct mgcp_conn *conn)
 	switch (conn->type) {
 	case MGCP_CONN_TYPE_RTP:
 		/* Dump RTP connection */
-		snprintf(str, sizeof(str), "(%s/rtp, id:%u, ip:%s, "
+		snprintf(str, sizeof(str), "(%s/rtp, id:0x%s, ip:%s, "
 			 "rtp:%u rtcp:%u)",
 			 conn->name,
 			 conn->id,

src/libosmo-mgcp/mgcp_msg.c

@@ -82,7 +82,7 @@ int mgcp_parse_conn_mode(const char *mode, struct mgcp_endpoint *endp,
 
 	if (!mode) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "endpoint:%x missing connection mode\n",
+		     "endpoint:0x%x missing connection mode\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -101,7 +101,7 @@ int mgcp_parse_conn_mode(const char *mode, struct mgcp_endpoint *endp,
 		conn->mode = MGCP_CONN_LOOPBACK;
 	else {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "endpoint:%x unknown connection mode: '%s'\n",
+		     "endpoint:0x%x unknown connection mode: '%s'\n",
 		     ENDPOINT_NUMBER(endp), mode);
 		ret = -1;
 	}
@@ -113,16 +113,16 @@ int mgcp_parse_conn_mode(const char *mode, struct mgcp_endpoint *endp,
 	}
 
 	LOGP(DLMGCP, LOGL_DEBUG,
-	     "endpoint:%x conn:%s\n",
+	     "endpoint:0x%x conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn));
 
 	LOGP(DLMGCP, LOGL_DEBUG,
-	     "endpoint:%x connection mode '%s' %d\n",
+	     "endpoint:0x%x connection mode '%s' %d\n",
 	     ENDPOINT_NUMBER(endp), mode, conn->mode);
 
 	/* Special handling für RTP connections */
 	if (conn->type == MGCP_CONN_TYPE_RTP) {
-		LOGP(DLMGCP, LOGL_DEBUG, "endpoint:%x output_enabled %d\n",
+		LOGP(DLMGCP, LOGL_DEBUG, "endpoint:0x%x output_enabled %d\n",
 		     ENDPOINT_NUMBER(endp), conn->u.rtp.end.output_enabled);
 	}
 
@@ -192,7 +192,7 @@ static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg,
 	if (strncmp(mgcp, "ds/e1", 5) == 0)
 		return find_e1_endpoint(cfg, mgcp);
 
-	gw = strtoul(mgcp, &endptr, 16);
+	gw = strtoul(mgcp, &endptr, 10);
 	if (gw > 0 && gw < cfg->trunk.number_endpoints && endptr[0] == '@')
 		return &cfg->trunk.endpoints[gw];
 
@@ -318,7 +318,7 @@ int mgcp_verify_call_id(struct mgcp_endpoint *endp, const char *callid)
 
 	if (strcmp(endp->callid, callid) != 0) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "endpoint:%x CallIDs does not match '%s' != '%s'\n",
+		     "endpoint:0x%x CallIDs does not match '%s' != '%s'\n",
 		     ENDPOINT_NUMBER(endp), endp->callid, callid);
 		return -1;
 	}
@@ -330,21 +330,39 @@ int mgcp_verify_call_id(struct mgcp_endpoint *endp, const char *callid)
   * \param[in] endp pointer to endpoint
   * \param{in] connection id to verify
   * \returns 1 when connection id seems plausible, 0 on error */
-int mgcp_verify_ci(struct mgcp_endpoint *endp, const char *ci)
+int mgcp_verify_ci(struct mgcp_endpoint *endp, const char *conn_id)
 {
-	uint32_t id;
-
-	if (!endp)
+	/* Check for null identifiers */
+	if (!conn_id) {
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "endpoint:0x%x invalid ConnectionIdentifier (missing)\n",
+		     ENDPOINT_NUMBER(endp));
 		return -1;
+	}
 
-	id = strtoul(ci, NULL, 10);
+	/* Check for empty connection identifiers */
+	if (strlen(conn_id) == 0) {
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "endpoint:0x%x invalid ConnectionIdentifier (empty)\n",
+		     ENDPOINT_NUMBER(endp));
+		return -1;
+	}
 
-	if (mgcp_conn_get(endp, id))
+	/* Check for over long connection identifiers */
+	if (strlen(conn_id) > MGCP_CONN_ID_LENGTH) {
+		LOGP(DLMGCP, LOGL_ERROR,
+		     "endpoint:0x%x invalid ConnectionIdentifier (too long) 0x%s\n",
+		     ENDPOINT_NUMBER(endp), conn_id);
+		return -1;
+	}
+
+	/* Check if connection exists */
+	if (mgcp_conn_get(endp, conn_id))
 		return 0;
 
 	LOGP(DLMGCP, LOGL_ERROR,
-	     "endpoint:%x No connection found under ConnectionIdentifier %u\n",
-	     ENDPOINT_NUMBER(endp), id);
+	     "endpoint:0x%x no connection found under ConnectionIdentifier 0x%s\n",
+	     ENDPOINT_NUMBER(endp), conn_id);
 
 	return -1;
 }
@@ -386,20 +404,3 @@ char *mgcp_strline(char *str, char **saveptr)
 
 	return result;
 }
-
-/*! Parse CI from a given string.
-  * \param[out] caller provided memory to store the result
-  * \param{in] string containing the connection id
-  * \returns 0 on success, -1 on error */
-int mgcp_parse_ci(uint32_t *conn_id, const char *ci)
-{
-
-	OSMO_ASSERT(conn_id);
-
-	if (!ci)
-		return -1;
-
-	*conn_id = strtoul(ci, NULL, 10);
-
-	return 0;
-}

src/libosmo-mgcp/mgcp_network.c

@@ -27,7 +27,6 @@
 #include <errno.h>
 #include <time.h>
 #include <limits.h>
-#include <sys/socket.h>
 #include <arpa/inet.h>
 
 #include <osmocom/core/msgb.h>
@@ -73,11 +72,11 @@ void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn)
 		rc = osmo_sock_local_ip(addr, inet_ntoa(conn->end.addr));
 		if (rc < 0)
 			LOGP(DRTP, LOGL_ERROR,
-			     "endpoint:%x CI:%i local interface auto detection failed, using configured addresses...\n",
+			     "endpoint:0x%x CI:%s local interface auto detection failed, using configured addresses...\n",
 			     ENDPOINT_NUMBER(endp), conn->conn->id);
 		else {
 			LOGP(DRTP, LOGL_DEBUG,
-			     "endpoint:%x CI:%i selected local rtp bind ip %s by probing using remote ip %s\n",
+			     "endpoint:0x%x CI:%s selected local rtp bind ip %s by probing using remote ip %s\n",
 			     ENDPOINT_NUMBER(endp), conn->conn->id, addr,
 			     inet_ntoa(conn->end.addr));
 			return;
@@ -88,17 +87,17 @@ void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn)
 	if (endp->cfg->net_ports.bind_addr) {
 		/* Check there is a bind IP for the RTP traffic configured,
 		 * if so, use that IP-Address */
-		strncpy(addr, endp->cfg->net_ports.bind_addr, INET_ADDRSTRLEN);
+		osmo_strlcpy(addr, endp->cfg->net_ports.bind_addr, INET_ADDRSTRLEN);
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x CI:%i using configured rtp bind ip as local bind ip %s\n",
+		     "endpoint:0x%x CI:%s using configured rtp bind ip as local bind ip %s\n",
 		     ENDPOINT_NUMBER(endp), conn->conn->id, addr);
 	} else {
 		/* No specific bind IP is configured for the RTP traffic, so
 		 * assume the IP where we listen for incoming MGCP messages
 		 * as bind IP */
-		strncpy(addr, endp->cfg->source_addr, INET_ADDRSTRLEN);
+		osmo_strlcpy(addr, endp->cfg->source_addr, INET_ADDRSTRLEN);
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x CI:%i using mgcp bind ip as local rtp bind ip: %s\n",
+		     "endpoint:0x%x CI:%s using mgcp bind ip as local rtp bind ip: %s\n",
 		     ENDPOINT_NUMBER(endp), conn->conn->id, addr);
 	}
 }
@@ -162,8 +161,8 @@ int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
 	OSMO_ASSERT(conn);
 
 	LOGP(DRTP, LOGL_DEBUG,
-	     "endpoint:%x sending dummy packet...\n", ENDPOINT_NUMBER(endp));
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x conn:%s\n",
+	     "endpoint:0x%x sending dummy packet...\n", ENDPOINT_NUMBER(endp));
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn->conn));
 
 	rc = mgcp_udp_send(conn->end.rtp.fd, &conn->end.addr,
@@ -184,7 +183,7 @@ int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
 
 failed:
 	LOGP(DRTP, LOGL_ERROR,
-	     "endpoint:%x Failed to send dummy %s packet.\n",
+	     "endpoint:0x%x Failed to send dummy %s packet.\n",
 	     ENDPOINT_NUMBER(endp), was_rtcp ? "RTCP" : "RTP");
 
 	return -1;
@@ -393,7 +392,7 @@ int mgcp_rtp_processing_default(struct mgcp_endpoint *endp,
 				struct mgcp_rtp_end *dst_end,
 				char *data, int *len, int buf_size)
 {
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x transcoding disabled\n",
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x transcoding disabled\n",
 	     ENDPOINT_NUMBER(endp));
 	return 0;
 }
@@ -407,7 +406,7 @@ int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp,
 				      struct mgcp_rtp_end *dst_end,
 				      struct mgcp_rtp_end *src_end)
 {
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x transcoding disabled\n",
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x transcoding disabled\n",
 	     ENDPOINT_NUMBER(endp));
 	return 0;
 }
@@ -419,7 +418,7 @@ void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
 					  struct mgcp_conn_rtp *conn)
 {
 	LOGP(DRTP, LOGL_DEBUG,
-	     "endpoint:%x conn:%s using format defaults\n",
+	     "endpoint:0x%x conn:%s using format defaults\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn->conn));
 
 	*payload_type = conn->end.codec.payload_type;
@@ -516,7 +515,7 @@ void mgcp_patch_and_count(struct mgcp_endpoint *endp,
 		state->out_stream.last_timestamp = timestamp;
 		state->out_stream.ssrc = ssrc - 1;	/* force output SSRC change */
 		LOGP(DRTP, LOGL_INFO,
-		     "endpoint:%x initializing stream, SSRC: %u timestamp: %u "
+		     "endpoint:0x%x initializing stream, SSRC: %u timestamp: %u "
 		     "pkt-duration: %d, from %s:%d\n",
 		     ENDPOINT_NUMBER(endp), state->in_stream.ssrc,
 		     state->seq_offset, state->packet_duration,
@@ -525,14 +524,14 @@ void mgcp_patch_and_count(struct mgcp_endpoint *endp,
 			state->packet_duration =
 			    rtp_end->codec.rate * 20 / 1000;
 			LOGP(DRTP, LOGL_NOTICE,
-			     "endpoint:%x fixed packet duration is not available, "
+			     "endpoint:0x%x fixed packet duration is not available, "
 			     "using fixed 20ms instead: %d from %s:%d\n",
 			     ENDPOINT_NUMBER(endp), state->packet_duration,
 			     inet_ntoa(addr->sin_addr), ntohs(addr->sin_port));
 		}
 	} else if (state->in_stream.ssrc != ssrc) {
 		LOGP(DRTP, LOGL_NOTICE,
-		     "endpoint:%x SSRC changed: %u -> %u  "
+		     "endpoint:0x%x SSRC changed: %u -> %u  "
 		     "from %s:%d\n",
 		     ENDPOINT_NUMBER(endp),
 		     state->in_stream.ssrc, rtp_hdr->ssrc,
@@ -561,7 +560,7 @@ void mgcp_patch_and_count(struct mgcp_endpoint *endp,
 				rtp_end->force_constant_ssrc -= 1;
 
 			LOGP(DRTP, LOGL_NOTICE,
-			     "endpoint:%x SSRC patching enabled, SSRC: %u "
+			     "endpoint:0x%x SSRC patching enabled, SSRC: %u "
 			     "SeqNo offset: %d, TS offset: %d "
 			     "from %s:%d\n",
 			     ENDPOINT_NUMBER(endp), state->in_stream.ssrc,
@@ -619,7 +618,7 @@ void mgcp_patch_and_count(struct mgcp_endpoint *endp,
 
 #if 0
 	DEBUGP(DRTP,
-	       "endpoint:%x payload hdr payload %u -> endp payload %u\n",
+	       "endpoint:0x%x payload hdr payload %u -> endp payload %u\n",
 	       ENDPOINT_NUMBER(endp), rtp_hdr->payload_type, payload);
 	rtp_hdr->payload_type = payload;
 #endif
@@ -670,16 +669,16 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr,
 
 	if (is_rtp) {
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x delivering RTP packet...\n",
+		     "endpoint:0x%x delivering RTP packet...\n",
 		     ENDPOINT_NUMBER(endp));
 	} else {
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x delivering RTCP packet...\n",
+		     "endpoint:0x%x delivering RTCP packet...\n",
 		     ENDPOINT_NUMBER(endp));
 	}
 
 	LOGP(DRTP, LOGL_DEBUG,
-	     "endpoint:%x loop:%d, mode:%d ",
+	     "endpoint:0x%x loop:%d, mode:%d ",
 	     ENDPOINT_NUMBER(endp), tcfg->audio_loop, conn_src->conn->mode);
 	if (conn_src->conn->mode == MGCP_CONN_LOOPBACK)
 		LOGPC(DRTP, LOGL_DEBUG, "(loopback)\n");
@@ -695,7 +694,7 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr,
 	if (!rtp_end->output_enabled) {
 		rtp_end->dropped_packets += 1;
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x output disabled, drop to %s %s "
+		     "endpoint:0x%x output disabled, drop to %s %s "
 		     "rtp_port:%u rtcp_port:%u\n",
 		     ENDPOINT_NUMBER(endp),
 		     dest_name,
@@ -718,7 +717,7 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr,
 				mgcp_patch_and_count(endp, rtp_state, rtp_end,
 						     addr, buf, buflen);
 			LOGP(DRTP, LOGL_DEBUG,
-			     "endpoint:%x process/send to %s %s "
+			     "endpoint:0x%x process/send to %s %s "
 			     "rtp_port:%u rtcp_port:%u\n",
 			     ENDPOINT_NUMBER(endp), dest_name,
 			     inet_ntoa(rtp_end->addr), ntohs(rtp_end->rtp_port),
@@ -757,7 +756,7 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr,
 		return nbytes;
 	} else if (!tcfg->omit_rtcp) {
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x send to %s %s rtp_port:%u rtcp_port:%u\n",
+		     "endpoint:0x%x send to %s %s rtp_port:%u rtcp_port:%u\n",
 		     ENDPOINT_NUMBER(endp),
 		     dest_name,
 		     inet_ntoa(rtp_end->addr),
@@ -804,13 +803,13 @@ static int receive_from(struct mgcp_endpoint *endp, int fd,
 
 	if (rc < 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x failed to receive packet, errno: %d/%s\n",
+		     "endpoint:0x%x failed to receive packet, errno: %d/%s\n",
 		     ENDPOINT_NUMBER(endp), errno, strerror(errno));
 		return -1;
 	}
 
 	if (tossed) {
-		LOGP(DRTP, LOGL_ERROR, "endpoint:%x packet tossed\n",
+		LOGP(DRTP, LOGL_ERROR, "endpoint:0x%x packet tossed\n",
 		     ENDPOINT_NUMBER(endp));
 	}
 
@@ -830,11 +829,11 @@ static int check_rtp_origin(struct mgcp_conn_rtp *conn,
 	if (memcmp(&addr->sin_addr, &conn->end.addr, sizeof(addr->sin_addr))
 	    != 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x data from wrong address: %s, ",
+		     "endpoint:0x%x data from wrong address: %s, ",
 		     ENDPOINT_NUMBER(endp), inet_ntoa(addr->sin_addr));
 		LOGPC(DRTP, LOGL_ERROR, "expected: %s\n",
 		      inet_ntoa(conn->end.addr));
-		LOGP(DRTP, LOGL_ERROR, "endpoint:%x packet tossed\n",
+		LOGP(DRTP, LOGL_ERROR, "endpoint:0x%x packet tossed\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -846,12 +845,12 @@ static int check_rtp_origin(struct mgcp_conn_rtp *conn,
 	if (conn->end.rtp_port != addr->sin_port &&
 	    conn->end.rtcp_port != addr->sin_port) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x data from wrong source port: %d, ",
+		     "endpoint:0x%x data from wrong source port: %d, ",
 		     ENDPOINT_NUMBER(endp), ntohs(addr->sin_port));
 		LOGPC(DRTP, LOGL_ERROR,
 		      "expected: %d for RTP or %d for RTCP\n",
 		      ntohs(conn->end.rtp_port), ntohs(conn->end.rtcp_port));
-		LOGP(DRTP, LOGL_ERROR, "endpoint:%x packet tossed\n",
+		LOGP(DRTP, LOGL_ERROR, "endpoint:0x%x packet tossed\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -868,14 +867,14 @@ static int check_rtp_destin(struct mgcp_conn_rtp *conn)
 
 	if (strcmp(inet_ntoa(conn->end.addr), "0.0.0.0") == 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x destination IP-address is invalid\n",
+		     "endpoint:0x%x destination IP-address is invalid\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
 
 	if (conn->end.rtp_port == 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x destination rtp port is invalid\n",
+		     "endpoint:0x%x destination rtp port is invalid\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -897,7 +896,7 @@ static int mgcp_recv(int *proto, struct sockaddr_in *addr, char *buf,
 	endp = conn->conn->endp;
 	tcfg = endp->tcfg;
 
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x receiving RTP/RTCP packet...\n",
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x receiving RTP/RTCP packet...\n",
 	     ENDPOINT_NUMBER(endp));
 
 	rc = receive_from(endp, fd->fd, addr, buf, buf_size);
@@ -905,11 +904,11 @@ static int mgcp_recv(int *proto, struct sockaddr_in *addr, char *buf,
 		return -1;
 	*proto = fd == &conn->end.rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP;
 
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x ", ENDPOINT_NUMBER(endp));
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x ", ENDPOINT_NUMBER(endp));
 	LOGPC(DRTP, LOGL_DEBUG, "receiveing from %s %s %d\n",
 	      conn->conn->name, inet_ntoa(addr->sin_addr),
 	      ntohs(addr->sin_port));
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x conn:%s\n", ENDPOINT_NUMBER(endp),
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x conn:%s\n", ENDPOINT_NUMBER(endp),
 	     mgcp_conn_dump(conn->conn));
 
 	/* Check if the origin of the RTP packet seems plausible */
@@ -921,10 +920,10 @@ static int mgcp_recv(int *proto, struct sockaddr_in *addr, char *buf,
 	/* Filter out dummy message */
 	if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) {
 		LOGP(DRTP, LOGL_NOTICE,
-		     "endpoint:%x dummy message received\n",
+		     "endpoint:0x%x dummy message received\n",
 		     ENDPOINT_NUMBER(endp));
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x packet tossed\n", ENDPOINT_NUMBER(endp));
+		     "endpoint:0x%x packet tossed\n", ENDPOINT_NUMBER(endp));
 		return 0;
 	}
 
@@ -948,7 +947,7 @@ static int mgcp_send_rtp(int proto, struct sockaddr_in *addr, char *buf,
 	struct mgcp_endpoint *endp;
 	endp = conn_src->conn->endp;
 
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x destin conn:%s\n",
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x destin conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn_dst->conn));
 
 	/* Before we try to deliver the packet, we check if the destination
@@ -962,7 +961,7 @@ static int mgcp_send_rtp(int proto, struct sockaddr_in *addr, char *buf,
 	switch (conn_dst->type) {
 	case MGCP_RTP_DEFAULT:
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x endpoint type is MGCP_RTP_DEFAULT, "
+		     "endpoint:0x%x endpoint type is MGCP_RTP_DEFAULT, "
 		     "using mgcp_send() to forward data directly\n",
 		     ENDPOINT_NUMBER(endp));
 		return mgcp_send(endp, proto == MGCP_PROTO_RTP,
@@ -970,7 +969,7 @@ static int mgcp_send_rtp(int proto, struct sockaddr_in *addr, char *buf,
 	case MGCP_OSMUX_BSC_NAT:
 	case MGCP_OSMUX_BSC:
 		LOGP(DRTP, LOGL_DEBUG,
-		     "endpoint:%x endpoint type is MGCP_OSMUX_BSC_NAT, "
+		     "endpoint:0x%x endpoint type is MGCP_OSMUX_BSC_NAT, "
 		     "using osmux_xfrm_to_osmux() to forward data through OSMUX\n",
 		     ENDPOINT_NUMBER(endp));
 		return osmux_xfrm_to_osmux(buf, buf_size, conn_dst);
@@ -980,7 +979,7 @@ static int mgcp_send_rtp(int proto, struct sockaddr_in *addr, char *buf,
 	 * be discarded, this should not happen, normally the MGCP type
 	 * should be properly set */
 	LOGP(DRTP, LOGL_ERROR,
-	     "endpoint:%x bad MGCP type -- data discarded!\n",
+	     "endpoint:0x%x bad MGCP type -- data discarded!\n",
 	     ENDPOINT_NUMBER(endp));
 
 	return -1;
@@ -1025,7 +1024,7 @@ int mgcp_dispatch_rtp_bridge_cb(int proto, struct sockaddr_in *addr, char *buf,
 	/* There is no destination conn, stop here */
 	if (!conn_dst) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x unable to find destination conn\n",
+		     "endpoint:0x%x unable to find destination conn\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -1033,7 +1032,7 @@ int mgcp_dispatch_rtp_bridge_cb(int proto, struct sockaddr_in *addr, char *buf,
 	/* The destination conn is not an RTP connection */
 	if (conn_dst->type != MGCP_CONN_TYPE_RTP) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x unable to find suitable destination conn\n",
+		     "endpoint:0x%x unable to find suitable destination conn\n",
 		     ENDPOINT_NUMBER(endp));
 		return -1;
 	}
@@ -1067,7 +1066,7 @@ static int rtp_data_net(struct osmo_fd *fd, unsigned int what)
 	endp = conn_src->conn->endp;
 	OSMO_ASSERT(endp);
 
-	LOGP(DRTP, LOGL_DEBUG, "endpoint:%x source conn:%s\n",
+	LOGP(DRTP, LOGL_DEBUG, "endpoint:0x%x source conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn_src->conn));
 
 	/* Receive packet */
@@ -1077,7 +1076,16 @@ static int rtp_data_net(struct osmo_fd *fd, unsigned int what)
 
 	/* Check if the connection is in loopback mode, if yes, just send the
 	 * incoming data back to the origin */
+
 	if (conn_src->conn->mode == MGCP_CONN_LOOPBACK) {
+		/* When we are in loopback mode, we loop back all incoming
+		 * packets back to their origin. We will use the originating
+		 * address data from the UDP packet header to patch the
+		 * outgoing address in connection on the fly */
+		if (conn_src->end.rtp_port == 0) {
+			conn_src->end.addr = addr.sin_addr;
+			conn_src->end.rtp_port = addr.sin_port;
+		}
 		return mgcp_send_rtp(proto, &addr, buf,
 				     len, conn_src, conn_src);
 	}
@@ -1109,41 +1117,17 @@ int mgcp_set_ip_tos(int fd, int tos)
  *  \returns 0 on success, -1 on ERROR */
 int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, int port)
 {
-	struct sockaddr_in addr;
-	int on = 1;
+	int rc;
 
-	fd->fd = socket(AF_INET, SOCK_DGRAM, 0);
-	if (fd->fd < 0) {
-		LOGP(DRTP, LOGL_ERROR, "failed to create UDP port (%s:%i).\n",
-		     source_addr, port);
-		return -1;
-	} else {
-		LOGP(DRTP, LOGL_DEBUG,
-		     "created UDP port (%s:%i).\n", source_addr, port);
-	}
-
-	if (setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) != 0) {
-		LOGP(DRTP, LOGL_ERROR,
-		     "failed to set socket options (%s:%i).\n", source_addr,
-		     port);
-		return -1;
-	}
-
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
-	inet_aton(source_addr, &addr.sin_addr);
-
-	if (bind(fd->fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
-		close(fd->fd);
-		fd->fd = -1;
+	rc = osmo_sock_init2(AF_INET, SOCK_DGRAM, IPPROTO_UDP, source_addr, port,
+			     NULL, 0, OSMO_SOCK_F_BIND);
+	if (rc < 0) {
 		LOGP(DRTP, LOGL_ERROR, "failed to bind UDP port (%s:%i).\n",
 		     source_addr, port);
 		return -1;
-	} else {
-		LOGP(DRTP, LOGL_DEBUG,
-		     "bound UDP port (%s:%i).\n", source_addr, port);
 	}
+	fd->fd = rc;
+	LOGP(DRTP, LOGL_DEBUG, "created socket + bound UDP port (%s:%i).\n", source_addr, port);
 
 	return 0;
 }
@@ -1158,7 +1142,7 @@ static int bind_rtp(struct mgcp_config *cfg, const char *source_addr,
 	if (mgcp_create_bind(source_addr, &rtp_end->rtp,
 			     rtp_end->local_port) != 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x failed to create RTP port: %s:%d\n", endpno,
+		     "endpoint:0x%x failed to create RTP port: %s:%d\n", endpno,
 		     source_addr, rtp_end->local_port);
 		goto cleanup0;
 	}
@@ -1166,7 +1150,7 @@ static int bind_rtp(struct mgcp_config *cfg, const char *source_addr,
 	if (mgcp_create_bind(source_addr, &rtp_end->rtcp,
 			     rtp_end->local_port + 1) != 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x failed to create RTCP port: %s:%d\n", endpno,
+		     "endpoint:0x%x failed to create RTCP port: %s:%d\n", endpno,
 		     source_addr, rtp_end->local_port + 1);
 		goto cleanup1;
 	}
@@ -1178,7 +1162,7 @@ static int bind_rtp(struct mgcp_config *cfg, const char *source_addr,
 	rtp_end->rtp.when = BSC_FD_READ;
 	if (osmo_fd_register(&rtp_end->rtp) != 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x failed to register RTP port %d\n", endpno,
+		     "endpoint:0x%x failed to register RTP port %d\n", endpno,
 		     rtp_end->local_port);
 		goto cleanup2;
 	}
@@ -1186,7 +1170,7 @@ static int bind_rtp(struct mgcp_config *cfg, const char *source_addr,
 	rtp_end->rtcp.when = BSC_FD_READ;
 	if (osmo_fd_register(&rtp_end->rtcp) != 0) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x failed to register RTCP port %d\n", endpno,
+		     "endpoint:0x%x failed to register RTCP port %d\n", endpno,
 		     rtp_end->local_port + 1);
 		goto cleanup3;
 	}
@@ -1217,12 +1201,12 @@ int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port,
 	struct mgcp_rtp_end *end;
 	char local_ip_addr[INET_ADDRSTRLEN];
 
-	snprintf(name, sizeof(name), "%s-%u", conn->conn->name, conn->conn->id);
+	snprintf(name, sizeof(name), "%s-%s", conn->conn->name, conn->conn->id);
 	end = &conn->end;
 
 	if (end->rtp.fd != -1 || end->rtcp.fd != -1) {
 		LOGP(DRTP, LOGL_ERROR,
-		     "endpoint:%x %u was already bound on conn:%s\n",
+		     "endpoint:0x%x %u was already bound on conn:%s\n",
 		     ENDPOINT_NUMBER(endp), rtp_port,
 		     mgcp_conn_dump(conn->conn));
 

src/libosmo-mgcp/mgcp_osmux.c

@@ -207,12 +207,18 @@ endpoint_lookup(struct mgcp_config *cfg, int cid,
 		case MGCP_DEST_NET:
 			/* FIXME: Get rid of CONN_ID_XXX! */
 			conn_net = mgcp_conn_get_rtp(endp, CONN_ID_NET);
-			this = &conn_net->end.addr;
+			if (conn_net)
+				this = &conn_net->end.addr;
+			else
+				this = NULL;
 			break;
 		case MGCP_DEST_BTS:
 			/* FIXME: Get rid of CONN_ID_XXX! */
 			conn_bts = mgcp_conn_get_rtp(endp, CONN_ID_BTS);
-			this = &conn_bts->end.addr;
+			if (conn_bts)
+				this = &conn_bts->end.addr;
+			else
+				this = NULL;
 			break;
 		default:
 			/* Should not ever happen */
@@ -222,7 +228,8 @@ endpoint_lookup(struct mgcp_config *cfg, int cid,
 
 		/* FIXME: Get rid of CONN_ID_XXX! */
 		conn_net = mgcp_conn_get_rtp(endp, CONN_ID_NET);
-		if (conn_net->osmux.cid == cid && this->s_addr == from_addr->s_addr)
+		if (conn_net && this && conn_net->osmux.cid == cid
+		    && this->s_addr == from_addr->s_addr)
 			return endp;
 	}
 
@@ -566,7 +573,7 @@ void osmux_disable_conn(struct mgcp_conn_rtp *conn)
 	if (conn->osmux.state != OSMUX_STATE_ENABLED)
 		return;
 
-	LOGP(DLMGCP, LOGL_INFO, "Releasing connection %u using Osmux CID %u\n",
+	LOGP(DLMGCP, LOGL_INFO, "Releasing connection %s using Osmux CID %u\n",
 	     conn->conn->id, conn->osmux.cid);
 	osmux_xfrm_input_close_circuit(conn->osmux.in, conn->osmux.cid);
 	conn->osmux.state = OSMUX_STATE_DISABLED;

src/libosmo-mgcp/mgcp_protocol.c

@@ -221,7 +221,7 @@ static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp,
 		osmux_extension[0] = '\0';
 	}
 
-	rc = msgb_printf(sdp, "I: %u%s\n\n", conn->conn->id, osmux_extension);
+	rc = msgb_printf(sdp, "I: %s%s\n\n", conn->conn->id, osmux_extension);
 	if (rc < 0)
 		goto error;
 
@@ -443,12 +443,11 @@ static struct msgb *handle_create_con(struct mgcp_parse_data *p)
 
 	const char *local_options = NULL;
 	const char *callid = NULL;
-	const char *ci = NULL;
 	const char *mode = NULL;
 	char *line;
 	int have_sdp = 0, osmux_cid = -1;
 	struct mgcp_conn_rtp *conn = NULL;
-	uint32_t conn_id;
+	struct mgcp_conn *_conn = NULL;
 	char conn_name[512];
 
 	LOGP(DLMGCP, LOGL_NOTICE, "CRCX: creating new connection ...\n");
@@ -469,7 +468,10 @@ static struct msgb *handle_create_con(struct mgcp_parse_data *p)
 			callid = (const char *)line + 3;
 			break;
 		case 'I':
-			ci = (const char *)line + 3;
+			/* It is illegal to send a connection identifier
+			 * together with a CRCX, the MGW will assign the
+			 * connection identifier by itself on CRCX */
+			return create_err_response(NULL, 523, "CRCX", p->trans);
 			break;
 		case 'M':
 			mode = (const char *)line + 3;
@@ -511,13 +513,6 @@ mgcp_header_done:
 		return create_err_response(endp, 400, "CRCX", p->trans);
 	}
 
-	if (!ci) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x insufficient parameters, missing connection id\n",
-		     ENDPOINT_NUMBER(endp));
-		return create_err_response(endp, 400, "CRCX", p->trans);
-	}
-
 	/* Check if we are able to accept the creation of another connection */
 	if (llist_count(&endp->conns) >= endp->type->max_conns) {
 		LOGP(DLMGCP, LOGL_ERROR,
@@ -539,7 +534,7 @@ mgcp_header_done:
 	 * callids match up so that we are sure that this is our call */
 	if (endp->callid && mgcp_verify_call_id(endp, callid)) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x allready seized by other call (%s)\n",
+		     "CRCX: endpoint:0x%x allready seized by other call (%s)\n",
 		     ENDPOINT_NUMBER(endp), endp->callid);
 		if (tcfg->force_realloc)
 			/* This is not our call, toss everything by releasing
@@ -561,39 +556,17 @@ mgcp_header_done:
 	set_local_cx_options(endp->tcfg->endpoints, &endp->local_options,
 			     local_options);
 
-	if (mgcp_parse_ci(&conn_id, ci)) {
+	snprintf(conn_name, sizeof(conn_name), "%s", callid);
+	_conn = mgcp_conn_alloc(NULL, endp, MGCP_CONN_TYPE_RTP, conn_name);
+	if (!_conn) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x insufficient parameters, missing ci (connectionIdentifier)\n",
-		     ENDPOINT_NUMBER(endp));
-		return create_err_response(endp, 400, "CRCX", p->trans);
-	}
-
-	/* Only accept another connection when the connection ID is different. */
-	if (mgcp_conn_get_rtp(endp, conn_id)) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x there is already a connection with id %u present!\n",
-		     conn_id, ENDPOINT_NUMBER(endp));
-		if (tcfg->force_realloc) {
-			/* Ignore the existing connection by just freeing it */
-			mgcp_conn_free(endp, conn_id);
-		} else {
-			/* There is already a connection with that ID present,
-			 * leave everything as it is and return with an error. */
-			return create_err_response(endp, 400, "CRCX", p->trans);
-		}
-	}
-
-	snprintf(conn_name, sizeof(conn_name), "%s-%u", callid, conn_id);
-	mgcp_conn_alloc(NULL, endp, conn_id, MGCP_CONN_TYPE_RTP,
-			conn_name);
-	conn = mgcp_conn_get_rtp(endp, conn_id);
-	if (!conn) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x unable to allocate RTP connection\n",
+		     "CRCX: endpoint:0x%x unable to allocate RTP connection\n",
 		     ENDPOINT_NUMBER(endp));
 		goto error2;
 
 	}
+	conn = mgcp_conn_get_rtp(endp, _conn->id);
+	OSMO_ASSERT(conn);
 
 	if (mgcp_parse_conn_mode(mode, endp, conn->conn) != 0) {
 		error_code = 517;
@@ -608,7 +581,7 @@ mgcp_header_done:
 		conn->osmux.state = OSMUX_STATE_NEGOTIATING;
 	} else if (endp->cfg->osmux == OSMUX_USAGE_ONLY) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x osmux only and no osmux offered\n",
+		     "CRCX: endpoint:0x%x osmux only and no osmux offered\n",
 		     ENDPOINT_NUMBER(endp));
 		goto error2;
 	}
@@ -635,7 +608,7 @@ mgcp_header_done:
 
 	if (setup_rtp_processing(endp, conn) != 0) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "CRCX: endpoint:%x could not start RTP processing!\n",
+		     "CRCX: endpoint:0x%x could not start RTP processing!\n",
 		     ENDPOINT_NUMBER(endp));
 		goto error2;
 	}
@@ -648,7 +621,7 @@ mgcp_header_done:
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGP(DLMGCP, LOGL_NOTICE,
-			     "CRCX: endpoint:%x CRCX rejected by policy\n",
+			     "CRCX: endpoint:0x%x CRCX rejected by policy\n",
 			     ENDPOINT_NUMBER(endp));
 			mgcp_release_endp(endp);
 			return create_err_response(endp, 400, "CRCX", p->trans);
@@ -664,7 +637,7 @@ mgcp_header_done:
 	}
 
 	LOGP(DLMGCP, LOGL_DEBUG,
-	     "CRCX: endpoint:%x Creating connection: CI: %u port: %u\n",
+	     "CRCX: endpoint:0x%x Creating connection: CI: %s port: %u\n",
 	     ENDPOINT_NUMBER(endp), conn->conn->id, conn->end.local_port);
 	if (p->cfg->change_cb)
 		p->cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX);
@@ -676,13 +649,13 @@ mgcp_header_done:
 		send_dummy(endp, conn);
 
 	LOGP(DLMGCP, LOGL_NOTICE,
-	     "CRCX: endpoint:%x connection successfully created\n",
+	     "CRCX: endpoint:0x%x connection successfully created\n",
 	     ENDPOINT_NUMBER(endp));
 	return create_response_with_sdp(endp, conn, "CRCX", p->trans);
 error2:
 	mgcp_release_endp(endp);
 	LOGP(DLMGCP, LOGL_NOTICE,
-	     "CRCX: endpoint:%x unable to create connection resource error\n",
+	     "CRCX: endpoint:0x%x unable to create connection resource error\n",
 	     ENDPOINT_NUMBER(endp));
 	return create_err_response(endp, error_code, "CRCX", p->trans);
 }
@@ -695,11 +668,10 @@ static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 	int silent = 0;
 	int have_sdp = 0;
 	char *line;
-	const char *ci = NULL;
 	const char *local_options = NULL;
 	const char *mode = NULL;
 	struct mgcp_conn_rtp *conn = NULL;
-	uint32_t conn_id;
+        const char *conn_id = NULL;
 
 	LOGP(DLMGCP, LOGL_NOTICE, "MDCX: modifying existing connection ...\n");
 
@@ -708,7 +680,7 @@ static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 
 	if (llist_count(&endp->conns) <= 0) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "MDCX: endpoint:%x endpoint is not holding a connection.\n",
+		     "MDCX: endpoint:0x%x endpoint is not holding a connection.\n",
 		     ENDPOINT_NUMBER(endp));
 		return create_err_response(endp, 400, "MDCX", p->trans);
 	}
@@ -723,8 +695,8 @@ static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 				goto error3;
 			break;
 		case 'I':
-			ci = (const char *)line + 3;
-			if (mgcp_verify_ci(endp, ci) != 0)
+			conn_id = (const char *)line + 3;
+			if (mgcp_verify_ci(endp, conn_id) != 0)
 				goto error3;
 			break;
 		case 'L':
@@ -742,16 +714,16 @@ static struct msgb *handle_modify_con(struct mgcp_parse_data *p)
 			break;
 		default:
 			LOGP(DLMGCP, LOGL_NOTICE,
-			     "MDCX: endpoint:%x Unhandled MGCP option: '%c'/%d\n",
+			     "MDCX: endpoint:0x%x Unhandled MGCP option: '%c'/%d\n",
 			     ENDPOINT_NUMBER(endp), line[0], line[0]);
 			break;
 		}
 	}
 
 mgcp_header_done:
-	if (mgcp_parse_ci(&conn_id, ci)) {
+	if (!conn_id) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "MDCX: endpoint:%x insufficient parameters, missing ci (connectionIdentifier)\n",
+		     "MDCX: endpoint:0x%x insufficient parameters, missing ci (connectionIdentifier)\n",
 		     ENDPOINT_NUMBER(endp));
 		return create_err_response(endp, 400, "MDCX", p->trans);
 	}
@@ -790,7 +762,7 @@ mgcp_header_done:
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGP(DLMGCP, LOGL_NOTICE,
-			     "MDCX: endpoint:%x rejected by policy\n",
+			     "MDCX: endpoint:0x%x rejected by policy\n",
 			     ENDPOINT_NUMBER(endp));
 			if (silent)
 				goto out_silent;
@@ -799,7 +771,7 @@ mgcp_header_done:
 		case MGCP_POLICY_DEFER:
 			/* stop processing */
 			LOGP(DLMGCP, LOGL_DEBUG,
-			     "MDCX: endpoint:%x defered by policy\n",
+			     "MDCX: endpoint:0x%x defered by policy\n",
 			     ENDPOINT_NUMBER(endp));
 			return NULL;
 			break;
@@ -813,7 +785,7 @@ mgcp_header_done:
 
 	/* modify */
 	LOGP(DLMGCP, LOGL_DEBUG,
-	     "MDCX: endpoint:%x modified conn:%s\n",
+	     "MDCX: endpoint:0x%x modified conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn->conn));
 	if (p->cfg->change_cb)
 		p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp),
@@ -829,14 +801,14 @@ mgcp_header_done:
 		goto out_silent;
 
 	LOGP(DLMGCP, LOGL_NOTICE,
-	     "MDCX: endpoint:%x connection successfully modified\n",
+	     "MDCX: endpoint:0x%x connection successfully modified\n",
 	     ENDPOINT_NUMBER(endp));
 	return create_response_with_sdp(endp, conn, "MDCX", p->trans);
 error3:
 	return create_err_response(endp, error_code, "MDCX", p->trans);
 
 out_silent:
-	LOGP(DLMGCP, LOGL_DEBUG, "MDCX: endpoint:%x silent exit\n",
+	LOGP(DLMGCP, LOGL_DEBUG, "MDCX: endpoint:0x%x silent exit\n",
 	     ENDPOINT_NUMBER(endp));
 	return NULL;
 }
@@ -849,20 +821,19 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	int silent = 0;
 	char *line;
 	char stats[1048];
-	const char *ci = NULL;
+	const char *conn_id = NULL;
 	struct mgcp_conn_rtp *conn = NULL;
-	uint32_t conn_id;
-
-	LOGP(DLMGCP, LOGL_NOTICE,
-	     "DLCX: endpoint:%x deleting connection ...\n",
-	     ENDPOINT_NUMBER(endp));
 
 	if (p->found != 0)
 		return create_err_response(NULL, error_code, "DLCX", p->trans);
 
+	LOGP(DLMGCP, LOGL_NOTICE,
+	     "DLCX: endpoint:0x%x deleting connection ...\n",
+	     ENDPOINT_NUMBER(endp));
+
 	if (llist_count(&endp->conns) <= 0) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "DLCX: endpoint:%x endpoint is not holding a connection.\n",
+		     "DLCX: endpoint:0x%x endpoint is not holding a connection.\n",
 		     ENDPOINT_NUMBER(endp));
 		return create_err_response(endp, 400, "DLCX", p->trans);
 	}
@@ -877,8 +848,8 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 				goto error3;
 			break;
 		case 'I':
-			ci = (const char *)line + 3;
-			if (mgcp_verify_ci(endp, ci) != 0)
+			conn_id = (const char *)line + 3;
+			if (mgcp_verify_ci(endp, conn_id) != 0)
 				goto error3;
 			break;
 		case 'Z':
@@ -886,7 +857,7 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 			break;
 		default:
 			LOGP(DLMGCP, LOGL_NOTICE,
-			     "DLCX: endpoint:%x Unhandled MGCP option: '%c'/%d\n",
+			     "DLCX: endpoint:0x%x Unhandled MGCP option: '%c'/%d\n",
 			     ENDPOINT_NUMBER(endp), line[0], line[0]);
 			break;
 		}
@@ -900,7 +871,7 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 		switch (rc) {
 		case MGCP_POLICY_REJECT:
 			LOGP(DLMGCP, LOGL_NOTICE,
-			     "DLCX: endpoint:%x rejected by policy\n",
+			     "DLCX: endpoint:0x%x rejected by policy\n",
 			     ENDPOINT_NUMBER(endp));
 			if (silent)
 				goto out_silent;
@@ -919,9 +890,9 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	/* When no connection id is supplied, we will interpret this as a
 	 * wildcarded DLCX and drop all connections at once. (See also
 	 * RFC3435 Section F.7) */
-	if (!ci) {
+	if (!conn_id) {
 		LOGP(DLMGCP, LOGL_NOTICE,
-		     "DLCX: endpoint:%x missing ci (connectionIdentifier), will remove all connections at once\n",
+		     "DLCX: endpoint:0x%x missing ci (connectionIdentifier), will remove all connections at once\n",
 		     ENDPOINT_NUMBER(endp));
 
 		mgcp_release_endp(endp);
@@ -932,14 +903,6 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 		return create_ok_response(endp, 200, "DLCX", p->trans);
 	}
 
-	/* Parse the connection id */
-	if (mgcp_parse_ci(&conn_id, ci)) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "DLCX: endpoint:%x insufficient parameters, invalid ci (connectionIdentifier)\n",
-		     ENDPOINT_NUMBER(endp));
-		return create_err_response(endp, 400, "DLCX", p->trans);
-	}
-
 	/* Find the connection */
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	if (!conn)
@@ -949,11 +912,11 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	mgcp_format_stats(stats, sizeof(stats), conn->conn);
 
 	/* delete connection */
-	LOGP(DLMGCP, LOGL_DEBUG, "DLCX: endpoint:%x deleting conn:%s\n",
+	LOGP(DLMGCP, LOGL_DEBUG, "DLCX: endpoint:0x%x deleting conn:%s\n",
 	     ENDPOINT_NUMBER(endp), mgcp_conn_dump(conn->conn));
 	mgcp_conn_free(endp, conn_id);
 	LOGP(DLMGCP, LOGL_NOTICE,
-	     "DLCX: endpoint:%x connection successfully deleted\n",
+	     "DLCX: endpoint:0x%x connection successfully deleted\n",
 	     ENDPOINT_NUMBER(endp));
 
 	/* When all connections are closed, the endpoint will be released
@@ -961,7 +924,7 @@ static struct msgb *handle_delete_con(struct mgcp_parse_data *p)
 	if (llist_count(&endp->conns) <= 0) {
 		mgcp_release_endp(endp);
 		LOGP(DLMGCP, LOGL_DEBUG,
-		     "DLCX: endpoint:%x endpoint released\n",
+		     "DLCX: endpoint:0x%x endpoint released\n",
 		     ENDPOINT_NUMBER(endp));
 	}
 
@@ -977,7 +940,7 @@ error3:
 	return create_err_response(endp, error_code, "DLCX", p->trans);
 
 out_silent:
-	LOGP(DLMGCP, LOGL_DEBUG, "DLCX: endpoint:%x silent exit\n",
+	LOGP(DLMGCP, LOGL_DEBUG, "DLCX: endpoint:0x%x silent exit\n",
 	     ENDPOINT_NUMBER(endp));
 	return NULL;
 }
@@ -1170,7 +1133,7 @@ struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr)
 	trunk->audio_payload = 126;
 	trunk->audio_send_ptime = 1;
 	trunk->audio_send_name = 1;
-	trunk->number_endpoints = 33;
+	trunk->vty_number_endpoints = 33;
 	trunk->omit_rtcp = 0;
 	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE);
 	llist_add_tail(&trunk->entry, &cfg->trunks);
@@ -1202,12 +1165,12 @@ int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg)
 
 	tcfg->endpoints = _talloc_zero_array(tcfg->cfg,
 					     sizeof(struct mgcp_endpoint),
-					     tcfg->number_endpoints,
+					     tcfg->vty_number_endpoints,
 					     "endpoints");
 	if (!tcfg->endpoints)
 		return -1;
 
-	for (i = 0; i < tcfg->number_endpoints; ++i) {
+	for (i = 0; i < tcfg->vty_number_endpoints; ++i) {
 		INIT_LLIST_HEAD(&tcfg->endpoints[i].conns);
 		tcfg->endpoints[i].cfg = tcfg->cfg;
 		tcfg->endpoints[i].tcfg = tcfg;
@@ -1217,6 +1180,7 @@ int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg)
 		tcfg->endpoints[i].type = &ep_typeset.rtp;
 	}
 
+	tcfg->number_endpoints = tcfg->vty_number_endpoints;
 	return 0;
 }
 
@@ -1224,7 +1188,7 @@ int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg)
  *  \param[in] endp endpoint to release */
 void mgcp_release_endp(struct mgcp_endpoint *endp)
 {
-	LOGP(DLMGCP, LOGL_DEBUG, "Releasing endpoint:%x\n",
+	LOGP(DLMGCP, LOGL_DEBUG, "Releasing endpoint:0x%x\n",
 	     ENDPOINT_NUMBER(endp));
 
 	/* Normally this function should only be called wehen

src/libosmo-mgcp/mgcp_sdp.c

@@ -365,7 +365,7 @@ int mgcp_write_response_sdp(const struct mgcp_endpoint *endp,
 
 	rc = msgb_printf(sdp,
 			 "v=0\r\n"
-			 "o=- %u 23 IN IP4 %s\r\n"
+			 "o=- %s 23 IN IP4 %s\r\n"
 			 "s=-\r\n"
 			 "c=IN IP4 %s\r\n"
 			 "t=0 0\r\n", conn->conn->id, addr, addr);

src/libosmo-mgcp/mgcp_vty.c

@@ -67,11 +67,11 @@ static int config_write_mgcp(struct vty *vty)
 		vty_out(vty, "  local ip %s%s", g_cfg->local_ip, VTY_NEWLINE);
 	vty_out(vty, "  bind ip %s%s", g_cfg->source_addr, VTY_NEWLINE);
 	vty_out(vty, "  bind port %u%s", g_cfg->source_port, VTY_NEWLINE);
-	vty_out(vty, "  rtp net-range %u %u%s",
+	vty_out(vty, "  rtp port-range %u %u%s",
 		g_cfg->net_ports.range_start, g_cfg->net_ports.range_end,
 		VTY_NEWLINE);
 	if (g_cfg->net_ports.bind_addr)
-		vty_out(vty, "  rtp net-bind-ip %s%s",
+		vty_out(vty, "  rtp bind-ip %s%s",
 			g_cfg->net_ports.bind_addr, VTY_NEWLINE);
 	if (g_cfg->net_ports.bind_addr_probe)
 		vty_out(vty, "  rtp ip-probing%s", VTY_NEWLINE);
@@ -115,7 +115,7 @@ static int config_write_mgcp(struct vty *vty)
 		g_cfg->trunk.audio_send_name ? "" : "no ", VTY_NEWLINE);
 	vty_out(vty, "  loop %u%s", ! !g_cfg->trunk.audio_loop, VTY_NEWLINE);
 	vty_out(vty, "  number endpoints %u%s",
-		g_cfg->trunk.number_endpoints - 1, VTY_NEWLINE);
+		g_cfg->trunk.vty_number_endpoints - 1, VTY_NEWLINE);
 	vty_out(vty, "  %sallow-transcoding%s",
 		g_cfg->trunk.no_audio_transcoding ? "no " : "", VTY_NEWLINE);
 	if (g_cfg->call_agent_addr)
@@ -292,28 +292,37 @@ static void parse_range(struct mgcp_port_range *range, const char **argv)
 #define RANGE_START_STR "Start of the range of ports\n"
 #define RANGE_END_STR "End of the range of ports\n"
 
-DEFUN(cfg_mgcp_rtp_net_range,
-      cfg_mgcp_rtp_net_range_cmd,
-      "rtp net-range <0-65534> <0-65534>",
+DEFUN(cfg_mgcp_rtp_port_range,
+      cfg_mgcp_rtp_port_range_cmd,
+      "rtp port-range <0-65534> <0-65534>",
       RTP_STR "Range of ports to use for the NET side\n"
       RANGE_START_STR RANGE_END_STR)
 {
 	parse_range(&g_cfg->net_ports, argv);
 	return CMD_SUCCESS;
 }
+ALIAS_DEPRECATED(cfg_mgcp_rtp_port_range,
+		 cfg_mgcp_rtp_net_range_cmd,
+		 "rtp net-range <0-65534> <0-65534>",
+		 RTP_STR "Range of ports to use for the NET side\n"
+		 RANGE_START_STR RANGE_END_STR)
 
-DEFUN(cfg_mgcp_rtp_net_bind_ip,
-      cfg_mgcp_rtp_net_bind_ip_cmd,
-      "rtp net-bind-ip A.B.C.D",
+DEFUN(cfg_mgcp_rtp_bind_ip,
+      cfg_mgcp_rtp_bind_ip_cmd,
+      "rtp bind-ip A.B.C.D",
       RTP_STR "Bind endpoints facing the Network\n" "Address to bind to\n")
 {
 	osmo_talloc_replace_string(g_cfg, &g_cfg->net_ports.bind_addr, argv[0]);
 	return CMD_SUCCESS;
 }
+ALIAS_DEPRECATED(cfg_mgcp_rtp_bind_ip,
+		 cfg_mgcp_rtp_net_bind_ip_cmd,
+		 "rtp net-bind-ip A.B.C.D",
+		 RTP_STR "Bind endpoints facing the Network\n" "Address to bind to\n")
 
-DEFUN(cfg_mgcp_rtp_no_net_bind_ip,
-      cfg_mgcp_rtp_no_net_bind_ip_cmd,
-      "no rtp net-bind-ip",
+DEFUN(cfg_mgcp_rtp_no_bind_ip,
+      cfg_mgcp_rtp_no_bind_ip_cmd,
+      "no rtp bind-ip",
       NO_STR RTP_STR "Bind endpoints facing the Network\n"
       "Address to bind to\n")
 {
@@ -321,6 +330,11 @@ DEFUN(cfg_mgcp_rtp_no_net_bind_ip,
 	g_cfg->net_ports.bind_addr = NULL;
 	return CMD_SUCCESS;
 }
+ALIAS_DEPRECATED(cfg_mgcp_rtp_no_bind_ip,
+		 cfg_mgcp_rtp_no_net_bind_ip_cmd,
+		 "no rtp net-bind-ip",
+		 NO_STR RTP_STR "Bind endpoints facing the Network\n"
+		 "Address to bind to\n")
 
 DEFUN(cfg_mgcp_rtp_net_bind_ip_probing,
       cfg_mgcp_rtp_net_bind_ip_probing_cmd,
@@ -510,7 +524,7 @@ DEFUN(cfg_mgcp_number_endp,
       "Number options\n" "Endpoints available\n" "Number endpoints\n")
 {
 	/* + 1 as we start counting at one */
-	g_cfg->trunk.number_endpoints = atoi(argv[0]) + 1;
+	g_cfg->trunk.vty_number_endpoints = atoi(argv[0]) + 1;
 	return CMD_SUCCESS;
 }
 
@@ -956,7 +970,7 @@ DEFUN(tap_rtp,
 	struct mgcp_trunk_config *trunk;
 	struct mgcp_endpoint *endp;
 	struct mgcp_conn_rtp *conn;
-	uint32_t conn_id;
+        const char *conn_id = NULL;
 
 	trunk = find_trunk(g_cfg, atoi(argv[0]));
 	if (!trunk) {
@@ -980,11 +994,11 @@ DEFUN(tap_rtp,
 
 	endp = &trunk->endpoints[endp_no];
 
-	conn_id = strtoul(argv[2], NULL, 10);
+	conn_id = argv[2];
 	conn = mgcp_conn_get_rtp(endp, conn_id);
 	if (!conn) {
-		vty_out(vty, "Conn ID %s/%d is invalid.%s",
-			argv[2], conn_id, VTY_NEWLINE);
+		vty_out(vty, "Conn ID %s is invalid.%s",
+			conn_id, VTY_NEWLINE);
 		return CMD_WARNING;
 	}
 
@@ -1102,7 +1116,7 @@ DEFUN(cfg_mgcp_osmux,
 	 * allow to turn it on yet. */
 	vty_out(vty, "OSMUX currently unavailable in this software version.%s", VTY_NEWLINE);
 	return CMD_WARNING;
-
+#if 0
 	if (strcmp(argv[0], "on") == 0)
 		g_cfg->osmux = OSMUX_USAGE_ON;
 	else if (strcmp(argv[0], "only") == 0)
@@ -1114,6 +1128,7 @@ DEFUN(cfg_mgcp_osmux,
 	}
 
 	return CMD_SUCCESS;
+#endif
 }
 
 DEFUN(cfg_mgcp_osmux_ip,
@@ -1181,8 +1196,11 @@ int mgcp_vty_init(void)
 	install_element(MGCP_NODE, &cfg_mgcp_bind_port_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_bind_early_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_net_range_cmd);
+	install_element(MGCP_NODE, &cfg_mgcp_rtp_port_range_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_net_bind_ip_cmd);
+	install_element(MGCP_NODE, &cfg_mgcp_rtp_bind_ip_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_no_net_bind_ip_cmd);
+	install_element(MGCP_NODE, &cfg_mgcp_rtp_no_bind_ip_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_net_bind_ip_probing_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_no_net_bind_ip_probing_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_rtp_ip_dscp_cmd);
@@ -1251,18 +1269,6 @@ int mgcp_vty_init(void)
 	return 0;
 }
 
-static int allocate_trunk(struct mgcp_trunk_config *trunk)
-{
-	if (mgcp_endpoints_allocate(trunk) != 0) {
-		LOGP(DLMGCP, LOGL_ERROR,
-		     "Failed to allocate %d endpoints on trunk %d.\n",
-		     trunk->number_endpoints, trunk->trunk_nr);
-		return -1;
-	}
-
-	return 0;
-}
-
 int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg,
 		      enum mgcp_role role)
 {
@@ -1286,17 +1292,18 @@ int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg,
 		return -1;
 	}
 
-	if (allocate_trunk(&g_cfg->trunk) != 0) {
+	if (mgcp_endpoints_allocate(&g_cfg->trunk) != 0) {
 		LOGP(DLMGCP, LOGL_ERROR,
-		     "Failed to initialize the virtual trunk.\n");
+		     "Failed to initialize the virtual trunk (%d endpoints)\n",
+		     g_cfg->trunk.number_endpoints);
 		return -1;
 	}
 
 	llist_for_each_entry(trunk, &g_cfg->trunks, entry) {
-		if (allocate_trunk(trunk) != 0) {
+		if (mgcp_endpoints_allocate(trunk) != 0) {
 			LOGP(DLMGCP, LOGL_ERROR,
-			     "Failed to initialize E1 trunk %d.\n",
-			     trunk->trunk_nr);
+			     "Failed to initialize trunk %d (%d endpoints)\n",
+			     trunk->trunk_nr, trunk->number_endpoints);
 			return -1;
 		}
 	}

src/osmo-bsc_mgcp/mgcp_main.c

@@ -189,33 +189,33 @@ static int read_call_agent(struct osmo_fd *fd, unsigned int what)
 
 int mgcp_vty_is_config_node(struct vty *vty, int node)
 {
-        switch (node) {
-        case CONFIG_NODE:
-                return 0;
+	switch (node) {
+	case CONFIG_NODE:
+		return 0;
 
-        default:
-                return 1;
-        }
+	default:
+		return 1;
+	}
 }
 
 int mgcp_vty_go_parent(struct vty *vty)
 {
-        switch (vty->node) {
-        case TRUNK_NODE:
-                vty->node = MGCP_NODE;
-                vty->index = NULL;
-                break;
-        case MGCP_NODE:
-        default:
-                if (mgcp_vty_is_config_node(vty, vty->node))
-                        vty->node = CONFIG_NODE;
-                else
-                        vty->node = ENABLE_NODE;
+	switch (vty->node) {
+	case TRUNK_NODE:
+		vty->node = MGCP_NODE;
+		vty->index = NULL;
+		break;
+	case MGCP_NODE:
+	default:
+		if (mgcp_vty_is_config_node(vty, vty->node))
+			vty->node = CONFIG_NODE;
+		else
+			vty->node = ENABLE_NODE;
 
-                vty->index = NULL;
-        }
+		vty->index = NULL;
+	}
 
-        return vty->node;
+	return vty->node;
 }
 
 
@@ -231,8 +231,8 @@ static const struct log_info_cat log_categories[] = {
 };
 
 const struct log_info log_info = {
-        .cat = log_categories,
-        .num_cat = ARRAY_SIZE(log_categories),
+	.cat = log_categories,
+	.num_cat = ARRAY_SIZE(log_categories),
 };
 
 int main(int argc, char **argv)
@@ -282,8 +282,8 @@ int main(int argc, char **argv)
 	/* set some callbacks */
 	cfg->reset_cb = mgcp_rsip_cb;
 
-        /* we need to bind a socket */
-        if (rc == 0) {
+	/* we need to bind a socket */
+	if (rc == 0) {
 		cfg->gw_fd.bfd.when = BSC_FD_READ;
 		cfg->gw_fd.bfd.cb = read_call_agent;
 		cfg->gw_fd.bfd.fd = socket(AF_INET, SOCK_DGRAM, 0);

src/osmo-mgw/mgw_main.c

@@ -4,6 +4,7 @@
 /*
  * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
  * (C) 2009-2011 by On-Waves
+ * (C) 2017 by sysmocom - s.f.m.c. GmbH, Author: Philipp Maier
  * All Rights Reserved
  *
  * This program is free software; you can redistribute it and/or modify
@@ -44,6 +45,7 @@
 #include <osmocom/core/stats.h>
 #include <osmocom/core/rate_ctr.h>
 #include <osmocom/core/logging.h>
+#include <osmocom/core/socket.h>
 
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
@@ -63,16 +65,16 @@ static struct mgcp_trunk_config *reset_trunk;
 static int reset_endpoints = 0;
 static int daemonize = 0;
 
-const char *openbsc_copyright =
+const char *osmomgw_copyright =
 	"Copyright (C) 2009-2010 Holger Freyther and On-Waves\r\n"
 	"Copyright (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>\r\n"
-	"Contributions by Daniel Willmann, Jan Lübbe, Stefan Schmidt\r\n"
-	"Dieter Spaar, Andreas Eversberg, Harald Welte\r\n\r\n"
+	"Contributions by Pablo Neira Ayuso, Jacob Erlbeck, Neels Hofmeyr\r\n"
+	"Philipp Maier\r\n\r\n"
 	"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
 	"This is free software: you are free to change and redistribute it.\r\n"
 	"There is NO WARRANTY, to the extent permitted by law.\r\n";
 
-static char *config_file = "mgcp.cfg";
+static char *config_file = "osmo-mgw.cfg";
 
 /* used by msgb and mgcp */
 void *tall_bsc_ctx = NULL;
@@ -195,33 +197,33 @@ static int read_call_agent(struct osmo_fd *fd, unsigned int what)
 
 int mgcp_vty_is_config_node(struct vty *vty, int node)
 {
-        switch (node) {
-        case CONFIG_NODE:
-                return 0;
+	switch (node) {
+	case CONFIG_NODE:
+		return 0;
 
-        default:
-                return 1;
-        }
+	default:
+		return 1;
+	}
 }
 
 int mgcp_vty_go_parent(struct vty *vty)
 {
-        switch (vty->node) {
-        case TRUNK_NODE:
-                vty->node = MGCP_NODE;
-                vty->index = NULL;
-                break;
-        case MGCP_NODE:
-        default:
-                if (mgcp_vty_is_config_node(vty, vty->node))
-                        vty->node = CONFIG_NODE;
-                else
-                        vty->node = ENABLE_NODE;
+	switch (vty->node) {
+	case TRUNK_NODE:
+		vty->node = MGCP_NODE;
+		vty->index = NULL;
+		break;
+	case MGCP_NODE:
+	default:
+		if (mgcp_vty_is_config_node(vty, vty->node))
+			vty->node = CONFIG_NODE;
+		else
+			vty->node = ENABLE_NODE;
 
-                vty->index = NULL;
-        }
+		vty->index = NULL;
+	}
 
-        return vty->node;
+	return vty->node;
 }
 
 
@@ -243,14 +245,14 @@ static const struct log_info_cat log_categories[] = {
 };
 
 const struct log_info log_info = {
-        .cat = log_categories,
-        .num_cat = ARRAY_SIZE(log_categories),
+	.cat = log_categories,
+	.num_cat = ARRAY_SIZE(log_categories),
 };
 
 int main(int argc, char **argv)
 {
-	struct sockaddr_in addr;
-	int on = 1, rc;
+	unsigned int flags;
+	int rc;
 
 	tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent");
 	msgb_talloc_ctx_init(tall_bsc_ctx, 0);
@@ -262,7 +264,7 @@ int main(int argc, char **argv)
 	if (!cfg)
 		return -1;
 
-	vty_info.copyright = openbsc_copyright;
+	vty_info.copyright = osmomgw_copyright;
 	vty_init(&vty_info);
 	logging_vty_add_cmds(NULL);
 	osmo_stats_vty_add_cmds(&log_info);
@@ -279,7 +281,7 @@ int main(int argc, char **argv)
 
 	/* start telnet after reading config for vty_get_bind_addr() */
 	rc = telnet_init_dynif(tall_bsc_ctx, NULL,
-			       vty_get_bind_addr(), OSMO_VTY_PORT_BSC_MGCP);
+			       vty_get_bind_addr(), OSMO_VTY_PORT_MGW);
 	if (rc < 0)
 		return rc;
 
@@ -287,54 +289,28 @@ int main(int argc, char **argv)
 	 * mgcp-command "RSIP" (Reset in Progress) is received */
 	cfg->reset_cb = mgcp_rsip_cb;
 
-        /* we need to bind a socket */
-        if (rc == 0) {
-		cfg->gw_fd.bfd.when = BSC_FD_READ;
-		cfg->gw_fd.bfd.cb = read_call_agent;
-		cfg->gw_fd.bfd.fd = socket(AF_INET, SOCK_DGRAM, 0);
-		if (cfg->gw_fd.bfd.fd < 0) {
-			perror("Gateway failed to listen");
-			return -1;
-		}
+	/* we need to bind a socket */
+	flags = OSMO_SOCK_F_BIND;
+	if (cfg->call_agent_addr)
+		flags |= OSMO_SOCK_F_CONNECT;
 
-		setsockopt(cfg->gw_fd.bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
-
-		memset(&addr, 0, sizeof(addr));
-		addr.sin_family = AF_INET;
-		addr.sin_port = htons(cfg->source_port);
-		inet_aton(cfg->source_addr, &addr.sin_addr);
-
-		if (bind(cfg->gw_fd.bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-			perror("Gateway failed to bind");
-			return -1;
-		}
-
-		cfg->gw_fd.bfd.data = msgb_alloc(4096, "mgcp-msg");
-		if (!cfg->gw_fd.bfd.data) {
-			fprintf(stderr, "Gateway memory error.\n");
-			return -1;
-		}
-
-		if (cfg->call_agent_addr) {
-			addr.sin_port = htons(2727);
-			inet_aton(cfg->call_agent_addr, &addr.sin_addr);
-			if (connect(cfg->gw_fd.bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-				LOGP(DLMGCP, LOGL_ERROR, "Failed to connect to: '%s'. errno: %d\n",
-				     cfg->call_agent_addr, errno);
-				close(cfg->gw_fd.bfd.fd);
-				cfg->gw_fd.bfd.fd = -1;
-				return -1;
-			}
-		}
-
-		if (osmo_fd_register(&cfg->gw_fd.bfd) != 0) {
-			LOGP(DLMGCP, LOGL_FATAL, "Failed to register the fd\n");
-			return -1;
-		}
-
-		LOGP(DLMGCP, LOGL_NOTICE, "Configured for MGCP.\n");
+	rc = osmo_sock_init2_ofd(&cfg->gw_fd.bfd, AF_INET, SOCK_DGRAM, IPPROTO_UDP,
+				cfg->source_addr, cfg->source_port,
+				cfg->call_agent_addr, cfg->call_agent_addr ? 2727 : 0, flags);
+	if (rc < 0) {
+		perror("Gateway failed to bind");
+		return -1;
 	}
 
+	cfg->gw_fd.bfd.cb = read_call_agent;
+	cfg->gw_fd.bfd.data = msgb_alloc(4096, "mgcp-msg");
+	if (!cfg->gw_fd.bfd.data) {
+		fprintf(stderr, "Gateway memory error.\n");
+		return -1;
+	}
+
+	LOGP(DLMGCP, LOGL_NOTICE, "Configured for MGCP.\n");
+
 	/* initialisation */
 	srand(time(NULL));
 

tests/legacy_mgcp/mgcp_test.c

@@ -1212,7 +1212,7 @@ const struct log_info log_info = {
 
 int main(int argc, char **argv)
 {
-	msgb_talloc_ctx_init(NULL, 0);
+	void *msgb_ctx = msgb_talloc_ctx_init(NULL, 0);
 	osmo_init_logging(&log_info);
 
 	test_strline();
@@ -1231,6 +1231,9 @@ int main(int argc, char **argv)
 	test_no_name();
 	test_osmux_cid();
 
+	OSMO_ASSERT(talloc_total_size(msgb_ctx) == 0);
+	OSMO_ASSERT(talloc_total_blocks(msgb_ctx) == 1);
+	talloc_free(msgb_ctx);
 	printf("Done\n");
 	return EXIT_SUCCESS;
 }

tests/mgcp/mgcp_test.c

@@ -82,27 +82,27 @@ static void test_strline(void)
 
 #define MDCX3 \
 	"MDCX 18983215 1@mgw MGCP 1.0\r\n" \
-	"I: 1\n"
+	"I: %s\n"
 
 #define MDCX3_RET \
 	"200 18983215 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
-	"m=audio 16002 RTP/AVP 128\r\n" \
-	"a=rtpmap:128 GSM-EFR/8000\r\n" \
+	"m=audio 16002 RTP/AVP 97\r\n" \
+	"a=rtpmap:97 GSM-EFR/8000\r\n" \
 	"a=ptime:40\r\n"
 
 #define MDCX3A_RET \
 	"200 18983215 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -112,15 +112,15 @@ static void test_strline(void)
 
 #define MDCX3_FMTP_RET \
 	"200 18983215 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
-	"m=audio 16006 RTP/AVP 128\r\n" \
-	"a=rtpmap:128 GSM-EFR/8000\r\n" \
+	"m=audio 16006 RTP/AVP 97\r\n" \
+	"a=rtpmap:97 GSM-EFR/8000\r\n" \
 	"a=fmtp:126 0/1/2\r\n" \
 	"a=ptime:40\r\n"
 
@@ -128,11 +128,11 @@ static void test_strline(void)
 	"MDCX 18983216 1@mgw MGCP 1.0\r\n" \
 	"M: sendrecv\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: p:20, a:AMR, nt:IN\r\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
 	"m=audio 4441 RTP/AVP 99\r\n" \
@@ -141,10 +141,10 @@ static void test_strline(void)
 
 #define MDCX4_RET(Ident) \
 	"200 " Ident " OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -154,10 +154,10 @@ static void test_strline(void)
 
 #define MDCX4_RO_RET(Ident) \
 	"200 " Ident " OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -169,11 +169,11 @@ static void test_strline(void)
 	"MDCX 18983217 1@mgw MGCP 1.0\r\n" \
 	"M: sendrecv\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: p:20-40, a:AMR, nt:IN\r\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
 	"m=audio 4441 RTP/AVP 99\r\n" \
@@ -184,11 +184,11 @@ static void test_strline(void)
 	"MDCX 18983218 1@mgw MGCP 1.0\r\n" \
 	"M: sendrecv\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: p:20-20, a:AMR, nt:IN\r\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
 	"m=audio 4441 RTP/AVP 99\r\n" \
@@ -199,11 +199,11 @@ static void test_strline(void)
 	"MDCX 18983219 1@mgw MGCP 1.0\r\n" \
 	"M: sendrecv\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: a:AMR, nt:IN\r\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
 	"m=audio 4441 RTP/AVP 99\r\n" \
@@ -214,11 +214,11 @@ static void test_strline(void)
 	"MDCX 18983220 1@mgw MGCP 1.0\r\n" \
 	"M: sendonly\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: p:20, a:AMR, nt:IN\r\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
 	"m=audio 4441 RTP/AVP 99\r\n" \
@@ -229,7 +229,7 @@ static void test_strline(void)
 	"MDCX 18983221 1@mgw MGCP 1.0\r\n" \
 	"M: recvonly\r" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"L: p:20, a:AMR, nt:IN\r\n"
 
 #define SHORT2	"CRCX 1"
@@ -242,7 +242,6 @@ static void test_strline(void)
 	"CRCX 2 1@mgw MGCP 1.0\r\n" \
 	"M: recvonly\r\n" \
 	"C: 2\r\n" \
-	"I: 1\r\n" \
 	"L: p:20\r\n" \
 	"\r\n" \
 	"v=0\r\n" \
@@ -253,10 +252,10 @@ static void test_strline(void)
 
 #define CRCX_RET \
 	"200 2 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -266,10 +265,10 @@ static void test_strline(void)
 
 #define CRCX_RET_NO_RTPMAP \
 	"200 2 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -278,10 +277,10 @@ static void test_strline(void)
 
 #define CRCX_FMTP_RET \
 	"200 2 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -294,7 +293,6 @@ static void test_strline(void)
 	"CRCX 2 1@mgw MGCP 1.0\r" \
 	"M: recvonly\r" \
 	"C: 2\r\n" \
-	"I: 1\n" \
 	"\n" \
 	"v=0\r" \
 	"c=IN IP4 123.12.12.123\r" \
@@ -303,10 +301,10 @@ static void test_strline(void)
 
 #define CRCX_ZYN_RET \
 	"200 2 OK\r\n" \
-	"I: 1\n" \
+	"I: %s\n" \
 	"\n" \
 	"v=0\r\n" \
-	"o=- 1 23 IN IP4 0.0.0.0\r\n" \
+	"o=- %s 23 IN IP4 0.0.0.0\r\n" \
 	"s=-\r\n" \
 	"c=IN IP4 0.0.0.0\r\n" \
 	"t=0 0\r\n" \
@@ -316,7 +314,7 @@ static void test_strline(void)
 
 #define DLCX \
 	"DLCX 7 1@mgw MGCP 1.0\r\n" \
-	"I: 1\r\n" \
+	"I: %s\r\n" \
 	"C: 2\r\n"
 
 #define DLCX_RET \
@@ -343,7 +341,6 @@ static void test_strline(void)
 
 #define CRCX_MULT_1 \
 	"CRCX 2 1@mgw MGCP 1.0\r\n" \
-	"I: 4711\r\n" \
 	"M: recvonly\r\n" \
 	"C: 2\r\n" \
 	"X\r\n" \
@@ -358,7 +355,6 @@ static void test_strline(void)
 
 #define CRCX_MULT_2 \
 	"CRCX 2 2@mgw MGCP 1.0\r\n" \
-	"I: 90210\r\n" \
 	"M: recvonly\r\n" \
 	"C: 2\r\n" \
 	"X\r\n" \
@@ -374,7 +370,6 @@ static void test_strline(void)
 
 #define CRCX_MULT_3 \
 	"CRCX 2 3@mgw MGCP 1.0\r\n" \
-	"I: 0815\r\n" \
 	"M: recvonly\r\n" \
 	"C: 2\r\n" \
 	"X\r\n" \
@@ -390,7 +385,6 @@ static void test_strline(void)
 
 #define CRCX_MULT_4 \
 	"CRCX 2 4@mgw MGCP 1.0\r\n" \
-	"I: 32168\r\n" \
 	"M: recvonly\r\n" \
 	"C: 2\r\n" \
 	"X\r\n" \
@@ -407,7 +401,6 @@ static void test_strline(void)
 #define CRCX_MULT_GSM_EXACT \
 	"CRCX 259260421 5@mgw MGCP 1.0\r\n" \
 	"C: 1355c6041e\r\n" \
-	"I: 3\r\n" \
 	"L: p:20, a:GSM, nt:IN\r\n" \
 	"M: recvonly\r\n" \
 	"\r\n" \
@@ -432,7 +425,7 @@ static void test_strline(void)
 #define MDCX_NAT_DUMMY \
 	"MDCX 23 5@mgw MGCP 1.0\r\n" \
 	"C: 1355c6041e\r\n" \
-	"I: 3\r\n" \
+	"I: %s\r\n" \
 	"\r\n" \
 	"c=IN IP4 8.8.8.8\r\n" \
 	"m=audio 16434 RTP/AVP 255\r\n"
@@ -482,12 +475,20 @@ static const struct mgcp_test retransmit[] = {
 	{"DLCX", DLCX, DLCX_RET},
 };
 
-static struct msgb *create_msg(const char *str)
+static struct msgb *create_msg(const char *str, const char *conn_id)
 {
 	struct msgb *msg;
+	int len;
+
+	printf("creating message from statically defined input:\n");
+	printf("---------8<---------\n%s\n---------8<---------\n", str);
 
 	msg = msgb_alloc_headroom(4096, 128, "MGCP msg");
-	int len = sprintf((char *)msg->data, "%s", str);
+	if (conn_id && strlen(conn_id))
+		len = sprintf((char *)msg->data, str, conn_id, conn_id);
+	else
+		len = sprintf((char *)msg->data, "%s", str);
+
 	msg->l2h = msgb_put(msg, len);
 	return msg;
 }
@@ -554,20 +555,97 @@ static void test_values(void)
 		    MGCP_CONN_RECV_SEND);
 }
 
+/* Extract a connection ID from a response (CRCX) */
+static int get_conn_id_from_response(uint8_t *resp, char *conn_id,
+				     unsigned int conn_id_len)
+{
+	char *conn_id_ptr;
+	int i;
+
+	conn_id_ptr = strstr((char *)resp, "I: ");
+	if (!conn_id_ptr)
+		return -EINVAL;
+
+	memset(conn_id, 0, conn_id_len);
+	memcpy(conn_id, conn_id_ptr + 3, 32);
+
+	for (i = 0; i < conn_id_len; i++) {
+		if (conn_id[i] == '\n' || conn_id[i] == '\r')
+			conn_id[i] = '\0';
+	}
+
+	/* A valid conn_id must at least contain one digit, and must
+	 * not exceed a length of 32 digits */
+	OSMO_ASSERT(strlen(conn_id) <= 32);
+	OSMO_ASSERT(strlen(conn_id) > 0);
+
+	return 0;
+}
+
+/* Check response, automatically patch connection ID if needed */
+static int check_response(uint8_t *resp, const char *exp_resp)
+{
+	char exp_resp_patched[4096];
+	const char *exp_resp_ptr;
+	char conn_id[256];
+
+	printf("checking response:\n");
+
+	/* If the expected response is intened to be patched
+	 * (%s placeholder inside) we will patch it with the
+	 * connection identifier we just received from the
+	 * real response. This is necessary because the CI
+	 * is generated by the mgcp code on CRCX and we can
+	 * not know it in advance */
+	if (strstr(exp_resp, "%s")) {
+		if (get_conn_id_from_response(resp, conn_id, sizeof(conn_id)) ==
+		    0) {
+			sprintf(exp_resp_patched, exp_resp, conn_id, conn_id);
+			exp_resp_ptr = exp_resp_patched;
+			printf
+			    ("using message with patched conn_id for comparison\n");
+		} else {
+			printf
+			    ("patching conn_id failed, using message as statically defined for comparison\n");
+			exp_resp_ptr = exp_resp;
+		}
+	} else {
+		printf("using message as statically defined for comparison\n");
+		exp_resp_ptr = exp_resp;
+	}
+
+	if (strcmp((char *)resp, exp_resp_ptr) != 0) {
+		printf("Unexpected response, please check!\n");
+		printf
+		    ("Got:\n---------8<---------\n%s\n---------8<---------\n\n",
+		     resp);
+		printf
+		    ("Expected:\n---------8<---------\n%s\n---------8<---------\n",
+		     exp_resp_ptr);
+		return -EINVAL;
+	}
+
+	printf("Response matches our expectations.\n");
+	return 0;
+}
+
 static void test_messages(void)
 {
 	struct mgcp_config *cfg;
 	struct mgcp_endpoint *endp;
 	int i;
 	struct mgcp_conn_rtp *conn = NULL;
+	char last_conn_id[256];
+	int rc;
 
 	cfg = mgcp_config_alloc();
 
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	mgcp_endpoints_allocate(&cfg->trunk);
-
 	cfg->policy_cb = mgcp_test_policy_cb;
 
+	memset(last_conn_id, 0, sizeof(last_conn_id));
+
 	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));
 
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
@@ -575,6 +653,7 @@ static void test_messages(void)
 		struct msgb *inp;
 		struct msgb *msg;
 
+		printf("\n================================================\n");
 		printf("Testing %s\n", t->name);
 
 		last_endpoint = -1;
@@ -583,7 +662,7 @@ static void test_messages(void)
 		osmo_talloc_replace_string(cfg, &cfg->trunk.audio_fmtp_extra,
 					   t->extra_fmtp);
 
-		inp = create_msg(t->req);
+		inp = create_msg(t->req, last_conn_id);
 		msg = mgcp_handle_message(cfg, inp);
 		msgb_free(inp);
 		if (!t->exp_resp) {
@@ -592,12 +671,22 @@ static void test_messages(void)
 				       (char *)msg->data);
 				OSMO_ASSERT(false);
 			}
-		} else if (strcmp((char *)msg->data, t->exp_resp) != 0) {
-			printf("%s failed.\nExpected:\n%s\nGot:\n%s\n",
-			       t->name, t->exp_resp, (char *) msg->data);
+		} else if (check_response(msg->data, t->exp_resp) != 0) {
+			printf("%s failed.\n", t->name);
 			OSMO_ASSERT(false);
 		}
-		msgb_free(msg);
+
+		if (msg) {
+			rc = get_conn_id_from_response(msg->data, last_conn_id,
+						       sizeof(last_conn_id));
+			if (rc)
+				printf("(response contains a connection id)\n");
+			else
+				printf("(response does not contain a connection id)\n");
+		}
+
+		if (msg)
+			msgb_free(msg);
 
 		if (dummy_packets)
 			printf("Dummy packets: %d\n", dummy_packets);
@@ -605,7 +694,7 @@ static void test_messages(void)
 		if (last_endpoint != -1) {
 			endp = &cfg->trunk.endpoints[last_endpoint];
 
-			conn = mgcp_conn_get_rtp(endp, 1);
+			conn = mgcp_conn_get_rtp(endp, "1");
 			if (conn) {
 				OSMO_ASSERT(conn);
 
@@ -657,7 +746,7 @@ static void test_messages(void)
 		}
 
 		/* Check detected payload type */
-		if (t->ptype != PTYPE_IGNORE) {
+		if (conn && t->ptype != PTYPE_IGNORE) {
 			OSMO_ASSERT(last_endpoint != -1);
 			endp = &cfg->trunk.endpoints[last_endpoint];
 
@@ -682,12 +771,16 @@ static void test_retransmission(void)
 {
 	struct mgcp_config *cfg;
 	int i;
+	char last_conn_id[256];
+	int rc;
 
 	cfg = mgcp_config_alloc();
 
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	mgcp_endpoints_allocate(&cfg->trunk);
 
+	memset(last_conn_id, 0, sizeof(last_conn_id));
+
 	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));
 
 	for (i = 0; i < ARRAY_SIZE(retransmit); i++) {
@@ -695,24 +788,33 @@ static void test_retransmission(void)
 		struct msgb *inp;
 		struct msgb *msg;
 
+		printf("\n================================================\n");
 		printf("Testing %s\n", t->name);
 
-		inp = create_msg(t->req);
+		inp = create_msg(t->req, last_conn_id);
 		msg = mgcp_handle_message(cfg, inp);
 
 		msgb_free(inp);
-		if (strcmp((char *)msg->data, t->exp_resp) != 0) {
+		if (msg && check_response(msg->data, t->exp_resp) != 0) {
 			printf("%s failed '%s'\n", t->name, (char *)msg->data);
 			OSMO_ASSERT(false);
 		}
-		msgb_free(msg);
+
+		if (msg && strcmp(t->name, "CRCX") == 0) {
+		        rc = get_conn_id_from_response(msg->data, last_conn_id,
+						       sizeof(last_conn_id));
+			OSMO_ASSERT(rc == 0);
+		}
+
+		if (msg)
+			msgb_free(msg);
 
 		/* Retransmit... */
 		printf("Re-transmitting %s\n", t->name);
-		inp = create_msg(t->req);
+		inp = create_msg(t->req, last_conn_id);
 		msg = mgcp_handle_message(cfg, inp);
 		msgb_free(inp);
-		if (strcmp((char *)msg->data, t->exp_resp) != 0) {
+		if (check_response(msg->data, t->exp_resp) != 0) {
 			printf("%s failed '%s'\n", t->name, (char *)msg->data);
 			OSMO_ASSERT(false);
 		}
@@ -733,21 +835,26 @@ static void test_rqnt_cb(void)
 {
 	struct mgcp_config *cfg;
 	struct msgb *inp, *msg;
+	char conn_id[256];
 
 	cfg = mgcp_config_alloc();
 	cfg->rqnt_cb = rqnt_cb;
 
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	mgcp_endpoints_allocate(&cfg->trunk);
 
 	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));
 
-	inp = create_msg(CRCX);
-	msgb_free(mgcp_handle_message(cfg, inp));
+	inp = create_msg(CRCX, NULL);
+	msg = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(msg);
+	OSMO_ASSERT(get_conn_id_from_response(msg->data, conn_id,
+					      sizeof(conn_id)) == 0);
+	msgb_free(msg);
 	msgb_free(inp);
 
 	/* send the RQNT and check for the CB */
-	inp = create_msg(RQNT);
+	inp = create_msg(RQNT, conn_id);
 	msg = mgcp_handle_message(cfg, inp);
 	if (strncmp((const char *)msg->l2h, "200", 3) != 0) {
 		printf("FAILED: message is not 200. '%s'\n", msg->l2h);
@@ -762,7 +869,7 @@ static void test_rqnt_cb(void)
 	msgb_free(msg);
 	msgb_free(inp);
 
-	inp = create_msg(DLCX);
+	inp = create_msg(DLCX, conn_id);
 	msgb_free(mgcp_handle_message(cfg, inp));
 	msgb_free(inp);
 	talloc_free(cfg);
@@ -865,7 +972,7 @@ static void test_mgcp_stats(void)
 	int loss;
 	int rc;
 
-	msg = create_msg(DLCX_RET);
+	msg = create_msg(DLCX_RET, NULL);
 	rc = mgcp_parse_stats(msg, &bps, &bos, &pr, &_or, &loss, &jitter);
 	printf("Parsing result: %d\n", rc);
 	if (bps != 0 || bos != 0 || pr != 0 || _or != 0 || loss != 0
@@ -875,7 +982,7 @@ static void test_mgcp_stats(void)
 
 	msg =
 	    create_msg
-	    ("250 7 OK\r\nP: PS=10, OS=20, PR=30, OR=40, PL=-3, JI=40\r\n");
+		("250 7 OK\r\nP: PS=10, OS=20, PR=30, OR=40, PL=-3, JI=40\r\n", NULL);
 	rc = mgcp_parse_stats(msg, &bps, &bos, &pr, &_or, &loss, &jitter);
 	printf("Parsing result: %d\n", rc);
 	if (bps != 10 || bos != 20 || pr != 30 || _or != 40 || loss != -3
@@ -1014,6 +1121,7 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 	int last_in_ts_err_cnt = 0;
 	int last_out_ts_err_cnt = 0;
 	struct mgcp_conn_rtp *conn = NULL;
+	struct mgcp_conn *_conn = NULL;
 
 	printf("Testing packet error detection%s%s.\n",
 	       patch_ssrc ? ", patch SSRC" : "",
@@ -1025,7 +1133,7 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 
 	endp.type = &ep_typeset.rtp;
 
-	trunk.number_endpoints = 1;
+	trunk.vty_number_endpoints = 1;
 	trunk.endpoints = &endp;
 	trunk.force_constant_ssrc = patch_ssrc;
 	trunk.force_aligned_timing = patch_ts;
@@ -1033,9 +1141,10 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 	endp.tcfg = &trunk;
 
 	INIT_LLIST_HEAD(&endp.conns);
-	mgcp_conn_alloc(NULL, &endp, 4711, MGCP_CONN_TYPE_RTP,
-			"test-connection");
-	conn = mgcp_conn_get_rtp(&endp, 4711);
+	_conn = mgcp_conn_alloc(NULL, &endp, MGCP_CONN_TYPE_RTP,
+				"test-connection");
+	OSMO_ASSERT(_conn);
+	conn = mgcp_conn_get_rtp(&endp, _conn->id);
 	OSMO_ASSERT(conn);
 
 	rtp = &conn->end;
@@ -1083,6 +1192,7 @@ static void test_packet_error_detection(int patch_ssrc, int patch_ts)
 	}
 
 	force_monotonic_time_us = -1;
+	mgcp_conn_free_all(&endp);
 }
 
 static void test_multilple_codec(void)
@@ -1092,96 +1202,107 @@ static void test_multilple_codec(void)
 	struct msgb *inp, *resp;
 	struct in_addr addr;
 	struct mgcp_conn_rtp *conn = NULL;
+	char conn_id[256];
 
 	printf("Testing multiple payload types\n");
 
 	cfg = mgcp_config_alloc();
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	mgcp_endpoints_allocate(&cfg->trunk);
 	cfg->policy_cb = mgcp_test_policy_cb;
 	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));
 
 	/* Allocate endpoint 1@mgw with two codecs */
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_1);
+	inp = create_msg(CRCX_MULT_1, NULL);
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 1);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 4711);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 18);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == 97);
 
 	/* Allocate 2@mgw with three codecs, last one ignored */
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_2);
+	inp = create_msg(CRCX_MULT_2, NULL);
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 2);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 90210);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 18);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == 97);
 
 	/* Allocate 3@mgw with no codecs, check for PT == -1 */
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_3);
+	inp = create_msg(CRCX_MULT_3, NULL);
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 3);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 815);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == -1);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == -1);
 
 	/* Allocate 4@mgw with a single codec */
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_4);
+	inp = create_msg(CRCX_MULT_4, NULL);
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 4);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 32168);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 18);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == -1);
 
 	/* Allocate 5@mgw at select GSM.. */
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_GSM_EXACT);
+	inp = create_msg(CRCX_MULT_GSM_EXACT, NULL);
 	talloc_free(cfg->trunk.audio_name);
 	cfg->trunk.audio_name = "GSM/8000";
 	cfg->trunk.no_audio_transcoding = 1;
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 5);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 3);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 3);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == -1);
 
-	inp = create_msg(MDCX_NAT_DUMMY);
+	inp = create_msg(MDCX_NAT_DUMMY, conn_id);
 	last_endpoint = -1;
 	resp = mgcp_handle_message(cfg, inp);
 	msgb_free(inp);
 	msgb_free(resp);
 	OSMO_ASSERT(last_endpoint == 5);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 3);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 3);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == -1);
@@ -1198,19 +1319,21 @@ static void test_multilple_codec(void)
 	talloc_free(endp->last_response);
 	talloc_free(endp->last_trans);
 	endp->last_response = endp->last_trans = NULL;
-	conn = mgcp_conn_get_rtp(endp, 3);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(!conn);
 
 	last_endpoint = -1;
-	inp = create_msg(CRCX_MULT_GSM_EXACT);
+	inp = create_msg(CRCX_MULT_GSM_EXACT, NULL);
 	cfg->trunk.no_audio_transcoding = 0;
 	resp = mgcp_handle_message(cfg, inp);
+	OSMO_ASSERT(get_conn_id_from_response(resp->data, conn_id,
+					      sizeof(conn_id)) == 0);
 	msgb_free(inp);
 	msgb_free(resp);
 
 	OSMO_ASSERT(last_endpoint == 5);
 	endp = &cfg->trunk.endpoints[last_endpoint];
-	conn = mgcp_conn_get_rtp(endp, 3);
+	conn = mgcp_conn_get_rtp(endp, conn_id);
 	OSMO_ASSERT(conn);
 	OSMO_ASSERT(conn->end.codec.payload_type == 255);
 	OSMO_ASSERT(conn->end.alt_codec.payload_type == 0);
@@ -1223,18 +1346,20 @@ static void test_no_cycle(void)
 	struct mgcp_config *cfg;
 	struct mgcp_endpoint *endp;
 	struct mgcp_conn_rtp *conn = NULL;
+	struct mgcp_conn *_conn = NULL;
 
 	printf("Testing no sequence flow on initial packet\n");
 
 	cfg = mgcp_config_alloc();
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	mgcp_endpoints_allocate(&cfg->trunk);
 
 	endp = &cfg->trunk.endpoints[1];
 
-	mgcp_conn_alloc(NULL, endp, 4711, MGCP_CONN_TYPE_RTP,
-			"test-connection");
-	conn = mgcp_conn_get_rtp(endp, 4711);
+	_conn = mgcp_conn_alloc(NULL, endp, MGCP_CONN_TYPE_RTP,
+				"test-connection");
+	OSMO_ASSERT(_conn);
+	conn = mgcp_conn_get_rtp(endp, _conn->id);
 	OSMO_ASSERT(conn);
 
 	OSMO_ASSERT(conn->state.stats_initialized == 0);
@@ -1261,6 +1386,7 @@ static void test_no_cycle(void)
 	OSMO_ASSERT(conn->state.stats_cycles == UINT16_MAX + 1);
 	OSMO_ASSERT(conn->state.stats_max_seq == 0);
 
+	mgcp_release_endp(endp);
 	talloc_free(cfg);
 }
 
@@ -1272,7 +1398,7 @@ static void test_no_name(void)
 	printf("Testing no rtpmap name\n");
 	cfg = mgcp_config_alloc();
 
-	cfg->trunk.number_endpoints = 64;
+	cfg->trunk.vty_number_endpoints = 64;
 	cfg->trunk.audio_send_name = 0;
 	mgcp_endpoints_allocate(&cfg->trunk);
 
@@ -1280,9 +1406,10 @@ static void test_no_name(void)
 
 	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));
 
-	inp = create_msg(CRCX);
+	inp = create_msg(CRCX, NULL);
 	msg = mgcp_handle_message(cfg, inp);
-	if (strcmp((char *)msg->data, CRCX_RET_NO_RTPMAP) != 0) {
+
+	if (check_response(msg->data, CRCX_RET_NO_RTPMAP) != 0) {
 		printf("FAILED: there should not be a RTPMAP: %s\n",
 		       (char *)msg->data);
 		OSMO_ASSERT(false);
@@ -1329,7 +1456,7 @@ const struct log_info log_info = {
 
 int main(int argc, char **argv)
 {
-	msgb_talloc_ctx_init(NULL, 0);
+	void *msgb_ctx = msgb_talloc_ctx_init(NULL, 0);
 	osmo_init_logging(&log_info);
 
 	test_strline();
@@ -1348,6 +1475,9 @@ int main(int argc, char **argv)
 	test_no_name();
 	test_osmux_cid();
 
+	OSMO_ASSERT(talloc_total_size(msgb_ctx) == 0);
+	OSMO_ASSERT(talloc_total_blocks(msgb_ctx) == 1);
+	talloc_free(msgb_ctx);
 	printf("Done\n");
 	return EXIT_SUCCESS;
 }

tests/mgcp/mgcp_test.ok

@@ -11,87 +11,574 @@ line: 'mixed (4 lines)'
 line: ''
 line: ''
 line: ''
+
+================================================
 Testing AUEP1
+creating message from statically defined input:
+---------8<---------
+AUEP 158663169 ds/e1-1/2@172.16.6.66 MGCP 1.0
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing AUEP2
+creating message from statically defined input:
+---------8<---------
+AUEP 18983213 ds/e1-2/1@172.16.6.66 MGCP 1.0
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing MDCX1
+creating message from statically defined input:
+---------8<---------
+MDCX 18983213 ds/e1-3/1@172.16.6.66 MGCP 1.0
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing MDCX2
+creating message from statically defined input:
+---------8<---------
+MDCX 18983214 ds/e1-1/2@172.16.6.66 MGCP 1.0
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing CRCX
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
+a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
 Dummy packets: 2
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 1: RECV
+
+================================================
 Testing MDCX3
+creating message from statically defined input:
+---------8<---------
+MDCX 18983215 1@mgw MGCP 1.0
+I: %s
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
 Dummy packets: 2
-Detected packet duration: 40
-Requested packetization period not set
-Connection mode: 1: RECV
+
+================================================
 Testing MDCX4
+creating message from statically defined input:
+---------8<---------
+MDCX 18983216 1@mgw MGCP 1.0
+M: sendrecv
+C: 2
+I: %s
+L: p:20, a:AMR, nt:IN
+
+v=0
+o=- %s 23 IN IP4 0.0.0.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 4441 RTP/AVP 99
+a=rtpmap:99 AMR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
 (response does not contain a connection id)
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 3: SEND RECV
+Dummy packets: 2
+
 ================================================
+Testing MDCX4_PT1
+creating message from statically defined input:
+---------8<---------
+MDCX 18983217 1@mgw MGCP 1.0
+M: sendrecv
+C: 2
+I: %s
+L: p:20-40, a:AMR, nt:IN
+
+v=0
+o=- %s 23 IN IP4 0.0.0.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 4441 RTP/AVP 99
+a=rtpmap:99 AMR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
 Response matches our expectations.
-Detected packet duration: 40
-Requested packetetization period: 20-40
-Connection mode: 3: SEND RECV
+(response does not contain a connection id)
+Dummy packets: 2
 
+================================================
+Testing MDCX4_PT2
+creating message from statically defined input:
+---------8<---------
+MDCX 18983218 1@mgw MGCP 1.0
+M: sendrecv
+C: 2
+I: %s
+L: p:20-20, a:AMR, nt:IN
+
+v=0
+o=- %s 23 IN IP4 0.0.0.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 4441 RTP/AVP 99
+a=rtpmap:99 AMR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
 using message with patched conn_id for comparison
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 3: SEND RECV
+Response matches our expectations.
+(response does not contain a connection id)
 Dummy packets: 2
+
+================================================
+Testing MDCX4_PT3
+creating message from statically defined input:
+---------8<---------
+MDCX 18983219 1@mgw MGCP 1.0
+M: sendrecv
+C: 2
+I: %s
+L: a:AMR, nt:IN
+
+v=0
+o=- %s 23 IN IP4 0.0.0.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 4441 RTP/AVP 99
+a=rtpmap:99 AMR/8000
+a=ptime:40
+
+---------8<---------
 checking response:
-Detected packet duration: 40
-Requested packetization period not set
-Connection mode: 3: SEND RECV
+using message with patched conn_id for comparison
+Response matches our expectations.
 (response does not contain a connection id)
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 2: SEND
+Dummy packets: 2
+
+================================================
+Testing MDCX4_SO
+creating message from statically defined input:
+---------8<---------
+MDCX 18983220 1@mgw MGCP 1.0
+M: sendonly
+C: 2
+I: %s
+L: p:20, a:AMR, nt:IN
+
+v=0
+o=- %s 23 IN IP4 0.0.0.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 4441 RTP/AVP 99
+a=rtpmap:99 AMR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
 using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
+
+================================================
+Testing MDCX4_RO
+creating message from statically defined input:
+---------8<---------
+MDCX 18983221 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+I: %s
+L: p:20, a:AMR, nt:IN
 
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 1: RECV
+---------8<---------
+checking response:
 using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
+Dummy packets: 2
+
+================================================
+Testing DLCX
+creating message from statically defined input:
+---------8<---------
+DLCX 7 1@mgw MGCP 1.0
+I: %s
+C: 2
+
+---------8<---------
 checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing CRCX_ZYN
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
 C: 2
-Detected packet duration: 20
-Requested packetization period not set
-Connection mode: 1: RECV
+
+v=0
 c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
+a=rtpmap:97 GSM-EFR/8000
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
 Dummy packets: 2
+
+================================================
+Testing EMPTY
+creating message from statically defined input:
+---------8<---------
+
+
+---------8<---------
+
+================================================
+Testing SHORT1
 creating message from statically defined input:
+---------8<---------
+CRCX 
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing SHORT2
+creating message from statically defined input:
+---------8<---------
+CRCX 1
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing SHORT3
+creating message from statically defined input:
+---------8<---------
+CRCX 1 1@mgw
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
 Testing SHORT4
+creating message from statically defined input:
+---------8<---------
+CRCX 1 1@mgw MGCP
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing RQNT1
+creating message from statically defined input:
+---------8<---------
 RQNT 186908780 1@mgw MGCP 1.0
+X: B244F267488
+S: D/9
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing RQNT2
+creating message from statically defined input:
+---------8<---------
 RQNT 186908781 1@mgw MGCP 1.0
+X: ADD4F26746F
+R: D/[0-9#*](N), G/ft, fxr/t38
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing DLCX
+creating message from statically defined input:
+---------8<---------
 DLCX 7 1@mgw MGCP 1.0
+I: %s
+C: 2
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing CRCX
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
+
 v=0
-Detected packet duration: 40
-Requested packetetization period: 20-20
-Connection mode: 1: RECV
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
 a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
+Dummy packets: 2
+
+================================================
 Testing MDCX3
-Detected packet duration: 40
-Requested packetization period not set
-Connection mode: 1: RECV
+creating message from statically defined input:
+---------8<---------
 MDCX 18983215 1@mgw MGCP 1.0
+I: %s
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+(response does not contain a connection id)
+Dummy packets: 2
+
+================================================
+Testing DLCX
+creating message from statically defined input:
+---------8<---------
 DLCX 7 1@mgw MGCP 1.0
+I: %s
+C: 2
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+(response contains a connection id)
+
+================================================
+Testing CRCX
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
 
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
+a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+Re-transmitting CRCX
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
+
+v=0
 c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
+a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+
+================================================
 Testing RQNT1
+creating message from statically defined input:
+---------8<---------
+RQNT 186908780 1@mgw MGCP 1.0
+X: B244F267488
+S: D/9
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+Re-transmitting RQNT1
+creating message from statically defined input:
 ---------8<---------
+RQNT 186908780 1@mgw MGCP 1.0
+X: B244F267488
+S: D/9
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+
+================================================
 Testing RQNT2
+creating message from statically defined input:
+---------8<---------
+RQNT 186908781 1@mgw MGCP 1.0
+X: ADD4F26746F
+R: D/[0-9#*](N), G/ft, fxr/t38
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+Re-transmitting RQNT2
+creating message from statically defined input:
 ---------8<---------
+RQNT 186908781 1@mgw MGCP 1.0
+X: ADD4F26746F
+R: D/[0-9#*](N), G/ft, fxr/t38
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+
 ================================================
+Testing MDCX3
+creating message from statically defined input:
+---------8<---------
+MDCX 18983215 1@mgw MGCP 1.0
+I: %s
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+Re-transmitting MDCX3
 creating message from statically defined input:
+---------8<---------
+MDCX 18983215 1@mgw MGCP 1.0
+I: %s
+
+---------8<---------
+checking response:
+using message with patched conn_id for comparison
+Response matches our expectations.
+
+================================================
 Testing DLCX
+creating message from statically defined input:
+---------8<---------
+DLCX 7 1@mgw MGCP 1.0
+I: %s
+C: 2
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
 Re-transmitting DLCX
+creating message from statically defined input:
+---------8<---------
+DLCX 7 1@mgw MGCP 1.0
+I: %s
+C: 2
+
+---------8<---------
+checking response:
+using message as statically defined for comparison
+Response matches our expectations.
+Testing packet loss calculation.
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 97
+a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+RQNT 186908780 1@mgw MGCP 1.0
 X: B244F267488
+S: D/9
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+DLCX 7 1@mgw MGCP 1.0
+I: %s
 C: 2
+
+---------8<---------
+Testing stat parsing
+creating message from statically defined input:
+---------8<---------
+250 7 OK
 P: PS=0, OS=0, PR=0, OR=0, PL=0, JI=0
 X-Osmo-CP: EC TI=0, TO=0
 
@@ -466,6 +953,156 @@ In TS: 160320, dTS: 160, Seq: 1002
 Stats: Jitter = 22, Transit = -32888
 In TS: 36888, dTS: 160, Seq: 25
 Out TS change: 160, dTS: 160, Seq change: 1, TS Err change: in +0, out +0
+Stats: Jitter = 21, Transit = -32888
+In TS: 160000, dTS: 0, Seq: 1000
+Out TS change: 12000, dTS: 12000, Seq change: 1, TS Err change: in +0, out +0
+Stats: Jitter = 0, Transit = -144000
+In TS: 160160, dTS: 160, Seq: 1001
+Out TS change: 160, dTS: 160, Seq change: 1, TS Err change: in +0, out +0
+Stats: Jitter = 0, Transit = -144000
+In TS: 160320, dTS: 160, Seq: 1002
+Out TS change: 160, dTS: 160, Seq change: 1, TS Err change: in +0, out +0
+Stats: Jitter = 0, Transit = -144000
+Testing multiple payload types
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+X
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 18 97
+a=rtpmap:18 G729/8000
+a=rtpmap:97 GSM-EFR/8000
+a=ptime:40
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+CRCX 2 2@mgw MGCP 1.0
+M: recvonly
+C: 2
+X
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 18 97 101
+a=rtpmap:18 G729/8000
+a=rtpmap:97 GSM-EFR/8000
+a=rtpmap:101 FOO/8000
+a=ptime:40
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+CRCX 2 3@mgw MGCP 1.0
+M: recvonly
+C: 2
+X
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP
+a=rtpmap:18 G729/8000
+a=rtpmap:97 GSM-EFR/8000
+a=rtpmap:101 FOO/8000
+a=ptime:40
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+CRCX 2 4@mgw MGCP 1.0
+M: recvonly
+C: 2
+X
+L: p:20
+
+v=0
+c=IN IP4 123.12.12.123
+m=audio 5904 RTP/AVP 18
+a=rtpmap:18 G729/8000
+a=rtpmap:97 GSM-EFR/8000
+a=rtpmap:101 FOO/8000
+a=ptime:40
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+CRCX 259260421 5@mgw MGCP 1.0
+C: 1355c6041e
+L: p:20, a:GSM, nt:IN
+M: recvonly
+
+v=0
+o=- 1439038275 1439038275 IN IP4 192.168.181.247
+s=-
+c=IN IP4 192.168.181.247
+t=0 0
+m=audio 29084 RTP/AVP 255 0 8 3 18 4 96 97 101
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:3 gsm/8000
+a=rtpmap:18 G729/8000
+a=fmtp:18 annexb=no
+a=rtpmap:4 G723/8000
+a=rtpmap:96 iLBC/8000
+a=fmtp:96 mode=20
+a=rtpmap:97 iLBC/8000
+a=fmtp:97 mode=30
+a=rtpmap:101 telephone-event/8000
+a=fmtp:101 0-15
+a=recvonly
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+MDCX 23 5@mgw MGCP 1.0
+C: 1355c6041e
+I: %s
+
+c=IN IP4 8.8.8.8
+m=audio 16434 RTP/AVP 255
+
+---------8<---------
+creating message from statically defined input:
+---------8<---------
+CRCX 259260421 5@mgw MGCP 1.0
+C: 1355c6041e
+L: p:20, a:GSM, nt:IN
+M: recvonly
+
+v=0
+o=- 1439038275 1439038275 IN IP4 192.168.181.247
+s=-
+c=IN IP4 192.168.181.247
+t=0 0
+m=audio 29084 RTP/AVP 255 0 8 3 18 4 96 97 101
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:3 gsm/8000
+a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=no
 a=rtpmap:4 G723/8000
+a=rtpmap:96 iLBC/8000
+a=fmtp:96 mode=20
+a=rtpmap:97 iLBC/8000
+a=fmtp:97 mode=30
+a=rtpmap:101 telephone-event/8000
+a=fmtp:101 0-15
+a=recvonly
+
+---------8<---------
+Testing no sequence flow on initial packet
+Testing no rtpmap name
+creating message from statically defined input:
+---------8<---------
+CRCX 2 1@mgw MGCP 1.0
+M: recvonly
+C: 2
+L: p:20
 

tests/mgcp_client/Makefile.am

@@ -37,3 +37,6 @@ mgcp_client_test_LDADD = \
 	$(LIBRARY_DL) \
 	$(LIBOSMONETIF_LIBS) \
 	$(NULL)
+
+update_exp:
+	$(builddir)/mgcp_client_test >$(srcdir)/mgcp_client_test.ok 2>$(srcdir)/mgcp_client_test.err

tests/mgcp_client/mgcp_client_test.c

@@ -24,6 +24,7 @@
 #include <osmocom/core/application.h>
 #include <osmocom/mgcp_client/mgcp_client.h>
 #include <osmocom/mgcp_client/mgcp_client_internal.h>
+#include <errno.h>
 
 void *ctx;
 
@@ -46,14 +47,14 @@ static struct msgb *mgcp_from_str(const char *head, const char *params)
 	l = strlen(head);
 	msg->l2h = msgb_put(msg, l);
 	data = (char*)msgb_l2(msg);
-	strncpy(data, head, l);
+	osmo_strlcpy(data, head, l);
 
 	data = (char*)msgb_put(msg, 1);
 	*data = '\n';
 
 	l = strlen(params);
 	data = (char*)msgb_put(msg, l);
-	strncpy(data, params, l);
+	osmo_strlcpy(data, params, l);
 
 	return msg;
 }
@@ -66,14 +67,14 @@ static struct msgb *from_str(const char *str)
 	char *data;
 	msg->l2h = msgb_put(msg, l);
 	data = (char*)msgb_l2(msg);
-	strncpy(data, str, l);
+	osmo_strlcpy(data, str, l);
 	return msg;
 }
 
 static struct mgcp_client_conf conf;
 struct mgcp_client *mgcp = NULL;
 
-static void reply_to(mgcp_trans_id_t trans_id, int code, const char *comment,
+static int reply_to(mgcp_trans_id_t trans_id, int code, const char *comment,
 		     int conn_id, const char *params)
 {
 	static char compose[4096 - 128];
@@ -87,7 +88,7 @@ static void reply_to(mgcp_trans_id_t trans_id, int code, const char *comment,
 
 	printf("composed response:\n-----\n%s\n-----\n",
 	       compose);
-	mgcp_client_rx(mgcp, from_str(compose));
+	return mgcp_client_rx(mgcp, from_str(compose));
 }
 
 void test_response_cb(struct mgcp_response *response, void *priv)
@@ -162,7 +163,7 @@ void test_mgcp_msg(void)
 		.endpoint = "23@mgw",
 		.audio_port = 1234,
 		.call_id = 47,
-		.conn_id = 11,
+		.conn_id = "11",
 		.conn_mode = MGCP_CONN_RECV_SEND
 	};
 
@@ -225,6 +226,51 @@ void test_mgcp_msg(void)
 	msgb_free(msg);
 }
 
+void test_mgcp_client_cancel()
+{
+	mgcp_trans_id_t trans_id;
+	struct msgb *msg;
+	struct mgcp_msg mgcp_msg = {
+		.verb = MGCP_VERB_CRCX,
+		.audio_ip = "192.168.100.23",
+		.endpoint = "23@mgw",
+		.audio_port = 1234,
+		.call_id = 47,
+		.conn_id = "11",
+		.conn_mode = MGCP_CONN_RECV_SEND,
+		.presence = (MGCP_MSG_PRESENCE_ENDPOINT | MGCP_MSG_PRESENCE_CALL_ID
+			     | MGCP_MSG_PRESENCE_CONN_ID | MGCP_MSG_PRESENCE_CONN_MODE),
+	};
+
+	printf("\n%s():\n", __func__);
+	fprintf(stderr, "\n%s():\n", __func__);
+
+	if (mgcp)
+		talloc_free(mgcp);
+	mgcp = mgcp_client_init(ctx, &conf);
+
+	msg = mgcp_msg_gen(mgcp, &mgcp_msg);
+	trans_id = mgcp_msg_trans_id(msg);
+	fprintf(stderr, "- composed msg with trans_id=%u\n", trans_id);
+
+	fprintf(stderr, "- not in queue yet, cannot cancel yet\n");
+	OSMO_ASSERT(mgcp_client_cancel(mgcp, trans_id) == -ENOENT);
+
+	fprintf(stderr, "- enqueue\n");
+	dummy_mgcp_send(msg);
+
+	fprintf(stderr, "- cancel succeeds\n");
+	OSMO_ASSERT(mgcp_client_cancel(mgcp, trans_id) == 0);
+
+	fprintf(stderr, "- late response gets discarded\n");
+	OSMO_ASSERT(reply_to(trans_id, 200, "OK", 1, "v=0\r\n") == -ENOENT);
+
+	fprintf(stderr, "- canceling again does nothing\n");
+	OSMO_ASSERT(mgcp_client_cancel(mgcp, trans_id) == -ENOENT);
+
+	fprintf(stderr, "%s() done\n", __func__);
+}
+
 static const struct log_info_cat log_categories[] = {
 };
 
@@ -244,10 +290,13 @@ int main(int argc, char **argv)
 	log_set_use_color(osmo_stderr_target, 0);
 	log_set_print_category(osmo_stderr_target, 1);
 
+	log_set_category_filter(osmo_stderr_target, DLMGCP, 1, LOGL_DEBUG);
+
 	mgcp_client_conf_init(&conf);
 
 	test_crcx();
 	test_mgcp_msg();
+	test_mgcp_client_cancel();
 
 	printf("Done\n");
 	fprintf(stderr, "Done\n");

tests/mgcp_client/mgcp_client_test.err

@@ -1,2 +1,15 @@
 DLMGCP message buffer to small, can not generate MGCP message
+
+test_mgcp_client_cancel():
+- composed msg with trans_id=1
+- not in queue yet, cannot cancel yet
+DLMGCP Cannot cancel, no such transaction: 1
+- enqueue
+- cancel succeeds
+DLMGCP Canceled transaction 1
+- late response gets discarded
+DLMGCP Cannot find matching MGCP transaction for trans_id 1
+- canceling again does nothing
+DLMGCP Cannot cancel, no such transaction: 1
+test_mgcp_client_cancel() done
 Done

tests/mgcp_client/mgcp_client_test.ok

@@ -59,4 +59,23 @@ RSIP 5 23@mgw MGCP 1.0
 
 Overfolow test:
 
+
+test_mgcp_client_cancel():
+composed:
+-----
+CRCX 1 23@mgw MGCP 1.0
+C: 2f
+I: 11
+L: p:20, a:AMR, nt:IN
+M: sendrecv
+
+-----
+composed response:
+-----
+200 1 OK
+I: 1
+
+v=0
+
+-----
 Done