src/libosmo-mgcp/mgcp_vty.c

/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
/* The protocol implementation */

/*
 * (C) 2009-2014 by Holger Hans Peter Freyther <zecke@selfish.org>
 * (C) 2009-2011 by On-Waves
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <osmocom/core/talloc.h>
#include <osmocom/vty/misc.h>
#include <osmocom/mgcp/mgcp.h>
#include <osmocom/mgcp/mgcp_common.h>
#include <osmocom/mgcp/mgcp_internal.h>
#include <osmocom/mgcp/vty.h>
#include <osmocom/mgcp/mgcp_conn.h>
#include <osmocom/mgcp/mgcp_endp.h>
#include <osmocom/mgcp/mgcp_trunk.h>

#include <string.h>
#include <inttypes.h>
#include <limits.h>

#define RTCP_OMIT_STR "Drop RTCP packets in both directions\n"
#define RTP_PATCH_STR "Modify RTP packet header in both directions\n"
#define RTP_KEEPALIVE_STR "Send dummy UDP packet to net RTP destination\n"
#define RTP_TS101318_RFC5993_CONV_STR "Convert GSM-HR from TS101318 to RFC5993 and vice versa\n"


static struct mgcp_config *g_cfg = NULL;

struct cmd_node mgcp_node = {
	MGCP_NODE,
	"%s(config-mgcp)# ",
	1,
};

struct cmd_node trunk_node = {
	TRUNK_NODE,
	"%s(config-mgcp-trunk)# ",
	1,
};

static int config_write_mgcp(struct vty *vty)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);

	vty_out(vty, "mgcp%s", VTY_NEWLINE);
	vty_out(vty, " domain %s%s", g_cfg->domain, VTY_NEWLINE);
	if (g_cfg->local_ip)
		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 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 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);
	else
		vty_out(vty, " no rtp ip-probing%s", VTY_NEWLINE);
	vty_out(vty, " rtp ip-dscp %d%s", g_cfg->endp_dscp, VTY_NEWLINE);
	if (trunk->keepalive_interval == MGCP_KEEPALIVE_ONCE)
		vty_out(vty, " rtp keep-alive once%s", VTY_NEWLINE);
	else if (trunk->keepalive_interval)
		vty_out(vty, " rtp keep-alive %d%s",
			trunk->keepalive_interval, VTY_NEWLINE);
	else
		vty_out(vty, " no rtp keep-alive%s", VTY_NEWLINE);

	if (trunk->omit_rtcp)
		vty_out(vty, " rtcp-omit%s", VTY_NEWLINE);
	else
		vty_out(vty, " no rtcp-omit%s", VTY_NEWLINE);
	if (trunk->force_constant_ssrc
	    || trunk->force_aligned_timing
	    || trunk->rfc5993_hr_convert) {
		vty_out(vty, " %srtp-patch ssrc%s",
			trunk->force_constant_ssrc ? "" : "no ",
			VTY_NEWLINE);
		vty_out(vty, " %srtp-patch timestamp%s",
			trunk->force_aligned_timing ? "" : "no ",
			VTY_NEWLINE);
		vty_out(vty, " %srtp-patch rfc5993hr%s",
			trunk->rfc5993_hr_convert ? "" : "no ",
			VTY_NEWLINE);
	} else
		vty_out(vty, " no rtp-patch%s", VTY_NEWLINE);
	if (trunk->audio_fmtp_extra)
		vty_out(vty, " sdp audio fmtp-extra %s%s",
			trunk->audio_fmtp_extra, VTY_NEWLINE);
	vty_out(vty, " %ssdp audio-payload send-ptime%s",
		trunk->audio_send_ptime ? "" : "no ", VTY_NEWLINE);
	vty_out(vty, " %ssdp audio-payload send-name%s",
		trunk->audio_send_name ? "" : "no ", VTY_NEWLINE);
	vty_out(vty, " loop %u%s", ! !trunk->audio_loop, VTY_NEWLINE);
	vty_out(vty, " number endpoints %u%s",
		trunk->vty_number_endpoints - 1, VTY_NEWLINE);
	vty_out(vty, " %sallow-transcoding%s",
		trunk->no_audio_transcoding ? "no " : "", VTY_NEWLINE);
	if (g_cfg->call_agent_addr)
		vty_out(vty, " call-agent ip %s%s", g_cfg->call_agent_addr,
			VTY_NEWLINE);
	if (g_cfg->force_ptime > 0)
		vty_out(vty, " rtp force-ptime %d%s", g_cfg->force_ptime,
			VTY_NEWLINE);

	switch (g_cfg->osmux) {
	case OSMUX_USAGE_ON:
		vty_out(vty, " osmux on%s", VTY_NEWLINE);
		break;
	case OSMUX_USAGE_ONLY:
		vty_out(vty, " osmux only%s", VTY_NEWLINE);
		break;
	case OSMUX_USAGE_OFF:
	default:
		vty_out(vty, " osmux off%s", VTY_NEWLINE);
		break;
	}
	if (g_cfg->osmux) {
		vty_out(vty, " osmux bind-ip %s%s",
			g_cfg->osmux_addr, VTY_NEWLINE);
		vty_out(vty, " osmux batch-factor %d%s",
			g_cfg->osmux_batch, VTY_NEWLINE);
		vty_out(vty, " osmux batch-size %u%s",
			g_cfg->osmux_batch_size, VTY_NEWLINE);
		vty_out(vty, " osmux port %u%s",
			g_cfg->osmux_port, VTY_NEWLINE);
		vty_out(vty, " osmux dummy %s%s",
			g_cfg->osmux_dummy ? "on" : "off", VTY_NEWLINE);
	}

	if (g_cfg->conn_timeout)
		vty_out(vty, " conn-timeout %u%s", g_cfg->conn_timeout, VTY_NEWLINE);

	return CMD_SUCCESS;
}

static void dump_rtp_end(struct vty *vty, struct mgcp_conn_rtp *conn)
{
	struct mgcp_rtp_state *state = &conn->state;
	struct mgcp_rtp_end *end = &conn->end;
	struct mgcp_rtp_codec *codec = end->codec;
	struct rate_ctr *tx_packets, *tx_bytes;
	struct rate_ctr *rx_packets, *rx_bytes;
	struct rate_ctr *dropped_packets;

	tx_packets = &conn->rate_ctr_group->ctr[RTP_PACKETS_TX_CTR];
	tx_bytes = &conn->rate_ctr_group->ctr[RTP_OCTETS_TX_CTR];
	rx_packets = &conn->rate_ctr_group->ctr[RTP_PACKETS_RX_CTR];
	rx_bytes = &conn->rate_ctr_group->ctr[RTP_OCTETS_RX_CTR];
	dropped_packets = &conn->rate_ctr_group->ctr[RTP_DROPPED_PACKETS_CTR];

	vty_out(vty,
		"   Packets Sent: %" PRIu64 " (%" PRIu64 " bytes total)%s"
		"   Packets Received: %" PRIu64 " (%" PRIu64 " bytes total)%s"
		"   Timestamp Errs: %" PRIu64 "->%" PRIu64 "%s"
		"   Dropped Packets: %" PRIu64 "%s"
		"   Payload Type: %d Rate: %u Channels: %d %s"
		"   Frame Duration: %u Frame Denominator: %u%s"
		"   FPP: %d Packet Duration: %u%s"
		"   FMTP-Extra: %s Audio-Name: %s Sub-Type: %s%s"
		"   Output-Enabled: %d Force-PTIME: %d%s",
		tx_packets->current, tx_bytes->current, VTY_NEWLINE,
		rx_packets->current, rx_bytes->current, VTY_NEWLINE,
		state->in_stream.err_ts_ctr->current,
		state->out_stream.err_ts_ctr->current,
	        VTY_NEWLINE,
		dropped_packets->current, VTY_NEWLINE,
		codec->payload_type, codec->rate, codec->channels, VTY_NEWLINE,
		codec->frame_duration_num, codec->frame_duration_den,
		VTY_NEWLINE, end->frames_per_packet, end->packet_duration_ms,
		VTY_NEWLINE, end->fmtp_extra, codec->audio_name,
		codec->subtype_name, VTY_NEWLINE, end->output_enabled,
		end->force_output_ptime, VTY_NEWLINE);
}

static void dump_endpoint(struct vty *vty, struct mgcp_endpoint *endp,
			  int trunk_nr, enum mgcp_trunk_type trunk_type, int show_stats)
{
	struct mgcp_conn *conn;

	vty_out(vty, "%s trunk %d endpoint %s:%s",
		trunk_type == MGCP_TRUNK_VIRTUAL ? "Virtual" : "E1", trunk_nr, endp->name, VTY_NEWLINE);
	vty_out(vty, "   Availability: %s%s",
		mgcp_endp_avail(endp) ? "available" : "not in service", VTY_NEWLINE);

	if (llist_empty(&endp->conns)) {
		vty_out(vty, "   No active connections%s", VTY_NEWLINE);
		return;
	}

	llist_for_each_entry(conn, &endp->conns, entry) {
		vty_out(vty, "   CONN: %s%s", mgcp_conn_dump(conn), VTY_NEWLINE);

		if (show_stats) {
			if (endp->cfg->conn_timeout) {
				struct timeval remaining;
				osmo_timer_remaining(&conn->watchdog, NULL, &remaining);
				vty_out(vty, "   Currently remaining timeout (seconds): %d.%06d%s",
					(int)remaining.tv_sec, (int)remaining.tv_usec, VTY_NEWLINE);
			}

			/* FIXME: Also add verbosity for other
			 * connection types (E1) as soon as
			 * the implementation is available */
			if (conn->type == MGCP_CONN_TYPE_RTP) {
				dump_rtp_end(vty, &conn->u.rtp);
			}
		}
	}
}

static void dump_ratectr_global(struct vty *vty, struct mgcp_ratectr_global *ratectr)
{
	vty_out(vty, "%s", VTY_NEWLINE);
	vty_out(vty, "Rate counters (global):%s", VTY_NEWLINE);

	if (ratectr->mgcp_general_ctr_group) {
		vty_out(vty, "   %s:%s",
			ratectr->mgcp_general_ctr_group->desc->
			group_description, VTY_NEWLINE);
		vty_out_rate_ctr_group_fmt(vty,
					   "   %25n: %10c (%S/s %M/m %H/h %D/d) %d",
					   ratectr->mgcp_general_ctr_group);
	}
}

static void dump_ratectr_trunk(struct vty *vty, struct mgcp_ratectr_trunk *ratectr)
{
	vty_out(vty, "%s", VTY_NEWLINE);
	vty_out(vty, "Rate counters (trunk):%s", VTY_NEWLINE);

	if (ratectr->mgcp_crcx_ctr_group) {
		vty_out(vty, "   %s:%s",
			ratectr->mgcp_crcx_ctr_group->desc->group_description,
			VTY_NEWLINE);
		vty_out_rate_ctr_group_fmt(vty,
					   "   %25n: %10c (%S/s %M/m %H/h %D/d) %d",
					   ratectr->mgcp_crcx_ctr_group);
	}
	if (ratectr->mgcp_dlcx_ctr_group) {
		vty_out(vty, "   %s:%s",
			ratectr->mgcp_dlcx_ctr_group->desc->group_description,
			VTY_NEWLINE);
		vty_out_rate_ctr_group_fmt(vty,
					   "   %25n: %10c (%S/s %M/m %H/h %D/d) %d",
					   ratectr->mgcp_dlcx_ctr_group);
	}
	if (ratectr->mgcp_mdcx_ctr_group) {
		vty_out(vty, "   %s:%s",
			ratectr->mgcp_mdcx_ctr_group->desc->group_description,
			VTY_NEWLINE);
		vty_out_rate_ctr_group_fmt(vty,
					   "   %25n: %10c (%S/s %M/m %H/h %D/d) %d",
					   ratectr->mgcp_mdcx_ctr_group);
	}
	if (ratectr->all_rtp_conn_stats) {
		vty_out(vty, "   %s:%s",
			ratectr->all_rtp_conn_stats->desc->group_description,
			VTY_NEWLINE);
		vty_out_rate_ctr_group_fmt(vty,
					   "   %25n: %10c (%S/s %M/m %H/h %D/d) %d",
					   ratectr->all_rtp_conn_stats);
	}
}


static void dump_trunk(struct vty *vty, struct mgcp_trunk *trunk, int show_stats)
{
	int i;

	vty_out(vty, "%s trunk %d with %d endpoints:%s",
		trunk->trunk_type == MGCP_TRUNK_VIRTUAL ? "Virtual" : "E1",
		trunk->trunk_nr, trunk->number_endpoints - 1, VTY_NEWLINE);

	if (!trunk->endpoints) {
		vty_out(vty, "No endpoints allocated yet.%s", VTY_NEWLINE);
		return;
	}

	for (i = 0; i < trunk->number_endpoints; ++i) {
		struct mgcp_endpoint *endp = trunk->endpoints[i];
		dump_endpoint(vty, endp, trunk->trunk_nr, trunk->trunk_type,
			      show_stats);
		if (i < trunk->number_endpoints - 1)
			vty_out(vty, "%s", VTY_NEWLINE);
	}

	if (show_stats)
		dump_ratectr_trunk(vty, &trunk->ratectr);
}

#define SHOW_MGCP_STR "Display information about the MGCP Media Gateway\n"

DEFUN(show_mcgp, show_mgcp_cmd,
      "show mgcp [stats]",
      SHOW_STR
      SHOW_MGCP_STR
      "Include Statistics\n")
{
	struct mgcp_trunk *trunk;
	int show_stats = argc >= 1;

	llist_for_each_entry(trunk, &g_cfg->trunks, entry)
		dump_trunk(vty, trunk, show_stats);

	if (g_cfg->osmux)
		vty_out(vty, "Osmux used CID: %d%s", osmux_cid_pool_count_used(),
			VTY_NEWLINE);

	if (show_stats)
		dump_ratectr_global(vty, &g_cfg->ratectr);

	return CMD_SUCCESS;
}

static void
dump_mgcp_endpoint(struct vty *vty, struct mgcp_trunk *trunk, const char *epname)
{
	struct mgcp_endpoint *endp;

	if (trunk) {
		/* If a trunk is given, search on that specific trunk only */
		endp = mgcp_endp_by_name_trunk(NULL, epname, trunk);
		if (!endp) {
			vty_out(vty, "endpoint %s not configured on trunk %d%s", epname, trunk->trunk_nr, VTY_NEWLINE);
			return;
		}
	} else {
		/* If no trunk is given, search on all possible trunks */
		endp = mgcp_endp_by_name(NULL, epname, g_cfg);
		if (!endp) {
			vty_out(vty, "endpoint %s not configured%s", epname, VTY_NEWLINE);
			return;
		}
	}

	trunk = endp->trunk;
	dump_endpoint(vty, endp, trunk->trunk_nr, trunk->trunk_type, true);
}

DEFUN(show_mcgp_endpoint, show_mgcp_endpoint_cmd,
      "show mgcp endpoint NAME",
      SHOW_STR
      SHOW_MGCP_STR
      "Display information about an endpoint\n" "The name of the endpoint\n")
{
	dump_mgcp_endpoint(vty, NULL, argv[0]);
	return CMD_SUCCESS;
}

DEFUN(show_mcgp_trunk_endpoint, show_mgcp_trunk_endpoint_cmd,
      "show mgcp trunk <0-64> endpoint NAME",
      SHOW_STR
      SHOW_MGCP_STR
      "Display information about a trunk\n" "Trunk number\n"
      "Display information about an endpoint\n" "The name of the endpoint\n")
{
	struct mgcp_trunk *trunk;
	int trunkidx = atoi(argv[0]);

	trunk = mgcp_trunk_by_num(g_cfg, trunkidx);
	if (!trunk) {
		vty_out(vty, "trunk %d not found%s", trunkidx, VTY_NEWLINE);
		return CMD_WARNING;
	}

	dump_mgcp_endpoint(vty, trunk, argv[1]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp, cfg_mgcp_cmd, "mgcp", "Configure the MGCP")
{
	vty->node = MGCP_NODE;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_local_ip,
      cfg_mgcp_local_ip_cmd,
      "local ip A.B.C.D",
      "Local options for the SDP record\n"
      IP_STR "IPv4 Address to use in SDP record\n")
{
	osmo_talloc_replace_string(g_cfg, &g_cfg->local_ip, argv[0]);
	return CMD_SUCCESS;
}

#define BIND_STR "Listen/Bind related socket option\n"
DEFUN(cfg_mgcp_bind_ip,
      cfg_mgcp_bind_ip_cmd,
      "bind ip A.B.C.D", BIND_STR IP_STR "IPv4 Address to bind to\n")
{
	osmo_talloc_replace_string(g_cfg, &g_cfg->source_addr, argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_bind_port,
      cfg_mgcp_bind_port_cmd,
      "bind port <0-65534>",
      BIND_STR "Port information\n" "UDP port to listen for MGCP messages\n")
{
	unsigned int port = atoi(argv[0]);
	g_cfg->source_port = port;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_bind_early,
      cfg_mgcp_bind_early_cmd,
      "bind early (0|1)",
      BIND_STR
      "Bind local ports on start up\n" "Bind on demand\n" "Bind on startup\n")
{
	vty_out(vty, "bind early is deprecated, remove it from the config.\n");
	return CMD_WARNING;
}

#define RTP_STR "RTP configuration\n"
#define UDP_PORT_STR "UDP Port number\n"
#define NET_START_STR "First UDP port allocated\n"
#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_port_range,
      cfg_mgcp_rtp_port_range_cmd,
      "rtp port-range <1024-65534> <1025-65535>",
      RTP_STR "Range of ports to use for the NET side\n"
      RANGE_START_STR RANGE_END_STR)
{
	int start;
	int end;

	start = atoi(argv[0]);
	end = atoi(argv[1]);

	if (end < start) {
		vty_out(vty, "range end port (%i) must be greater than the range start port (%i)!%s",
			end, start, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (start & 1) {
		vty_out(vty, "range must begin at an even port number, autocorrecting port (%i) to: %i%s",
			start, start & 0xFFFE, VTY_NEWLINE);
		start &= 0xFFFE;
	}

	if ((end & 1) == 0) {
		vty_out(vty, "range must end at an odd port number, autocorrecting port (%i) to: %i%s",
			end, end | 1, VTY_NEWLINE);
		end |= 1;
	}

	g_cfg->net_ports.range_start = start;
	g_cfg->net_ports.range_end = end;
	g_cfg->net_ports.last_port = g_cfg->net_ports.range_start;

	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_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_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")
{
	talloc_free(g_cfg->net_ports.bind_addr);
	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,
      "rtp ip-probing",
      RTP_STR "automatic rtp bind ip selection\n")
{
	g_cfg->net_ports.bind_addr_probe = true;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_rtp_no_net_bind_ip_probing,
      cfg_mgcp_rtp_no_net_bind_ip_probing_cmd,
      "no rtp ip-probing",
      NO_STR RTP_STR "no automatic rtp bind ip selection\n")
{
	g_cfg->net_ports.bind_addr_probe = false;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_rtp_ip_dscp,
      cfg_mgcp_rtp_ip_dscp_cmd,
      "rtp ip-dscp <0-255>",
      RTP_STR
      "Apply IP_TOS to the audio stream (including Osmux)\n" "The DSCP value\n")
{
	int dscp = atoi(argv[0]);
	g_cfg->endp_dscp = dscp;
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_mgcp_rtp_ip_dscp, cfg_mgcp_rtp_ip_tos_cmd,
		 "rtp ip-tos <0-255>",
		 RTP_STR
		 "Apply IP_TOS to the audio stream\n" "The DSCP value\n")
#define FORCE_PTIME_STR "Force a fixed ptime for packets sent"
DEFUN(cfg_mgcp_rtp_force_ptime,
      cfg_mgcp_rtp_force_ptime_cmd,
      "rtp force-ptime (10|20|40)",
      RTP_STR FORCE_PTIME_STR
      "The required ptime (packet duration) in ms\n" "10 ms\n20 ms\n40 ms\n")
{
	g_cfg->force_ptime = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_rtp_force_ptime,
      cfg_mgcp_no_rtp_force_ptime_cmd,
      "no rtp force-ptime", NO_STR RTP_STR FORCE_PTIME_STR)
{
	g_cfg->force_ptime = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_sdp_fmtp_extra,
      cfg_mgcp_sdp_fmtp_extra_cmd,
      "sdp audio fmtp-extra .NAME",
      "Add extra fmtp for the SDP file\n" "Audio\n" "Fmtp-extra\n"
      "Extra Information\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	char *txt = argv_concat(argv, argc, 0);
	if (!txt)
		return CMD_WARNING;

	osmo_talloc_replace_string(g_cfg, &trunk->audio_fmtp_extra, txt);
	talloc_free(txt);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_allow_transcoding,
      cfg_mgcp_allow_transcoding_cmd,
      "allow-transcoding", "Allow transcoding\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->no_audio_transcoding = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_allow_transcoding,
      cfg_mgcp_no_allow_transcoding_cmd,
      "no allow-transcoding", NO_STR "Allow transcoding\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->no_audio_transcoding = 1;
	return CMD_SUCCESS;
}

#define SDP_STR "SDP File related options\n"
#define AUDIO_STR "Audio payload options\n"
DEFUN_DEPRECATED(cfg_mgcp_sdp_payload_number,
      cfg_mgcp_sdp_payload_number_cmd,
      "sdp audio-payload number <0-255>",
      SDP_STR AUDIO_STR "Number\n" "Payload number\n")
{
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_mgcp_sdp_payload_number,
		 cfg_mgcp_sdp_payload_number_cmd_old,
		 "sdp audio payload number <0-255>",
		 SDP_STR AUDIO_STR AUDIO_STR "Number\n" "Payload number\n")

DEFUN_DEPRECATED(cfg_mgcp_sdp_payload_name,
      cfg_mgcp_sdp_payload_name_cmd,
      "sdp audio-payload name NAME",
      SDP_STR AUDIO_STR "Name\n" "Payload name\n")
{
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_mgcp_sdp_payload_name, cfg_mgcp_sdp_payload_name_cmd_old,
		 "sdp audio payload name NAME",
		 SDP_STR AUDIO_STR AUDIO_STR "Name\n" "Payload name\n")

DEFUN(cfg_mgcp_sdp_payload_send_ptime,
      cfg_mgcp_sdp_payload_send_ptime_cmd,
      "sdp audio-payload send-ptime",
      SDP_STR AUDIO_STR "Send SDP ptime (packet duration) attribute\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->audio_send_ptime = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_sdp_payload_send_ptime,
      cfg_mgcp_no_sdp_payload_send_ptime_cmd,
      "no sdp audio-payload send-ptime",
      NO_STR SDP_STR AUDIO_STR "Send SDP ptime (packet duration) attribute\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->audio_send_ptime = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_sdp_payload_send_name,
      cfg_mgcp_sdp_payload_send_name_cmd,
      "sdp audio-payload send-name",
      SDP_STR AUDIO_STR "Send SDP rtpmap with the audio name\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->audio_send_name = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_sdp_payload_send_name,
      cfg_mgcp_no_sdp_payload_send_name_cmd,
      "no sdp audio-payload send-name",
      NO_STR SDP_STR AUDIO_STR "Send SDP rtpmap with the audio name\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->audio_send_name = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_loop,
      cfg_mgcp_loop_cmd,
      "loop (0|1)",
      "Loop audio for all endpoints on main trunk\n" "Don't Loop\n" "Loop\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	if (g_cfg->osmux) {
		vty_out(vty, "Cannot use `loop' with `osmux'.%s", VTY_NEWLINE);
		return CMD_WARNING;
	}
	trunk->audio_loop = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_force_realloc,
      cfg_mgcp_force_realloc_cmd,
      "force-realloc (0|1)",
      "Force endpoint reallocation when the endpoint is still seized\n"
      "Don't force reallocation\n" "force reallocation\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_realloc = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_rtp_accept_all,
      cfg_mgcp_rtp_accept_all_cmd,
      "rtp-accept-all (0|1)",
      "Accept all RTP packets, even when the originating IP/Port does not match\n"
      "enable filter\n" "disable filter\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->rtp_accept_all = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_number_endp,
      cfg_mgcp_number_endp_cmd,
      "number endpoints <0-65534>",
      "Number options\n" "Endpoints available\n" "Number endpoints\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	/* + 1 as we start counting at one */
	trunk->vty_number_endpoints = atoi(argv[0]) + 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_omit_rtcp, cfg_mgcp_omit_rtcp_cmd, "rtcp-omit", RTCP_OMIT_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, 0);
	trunk->omit_rtcp = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_omit_rtcp,
      cfg_mgcp_no_omit_rtcp_cmd, "no rtcp-omit", NO_STR RTCP_OMIT_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->omit_rtcp = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_patch_rtp_ssrc,
      cfg_mgcp_patch_rtp_ssrc_cmd,
      "rtp-patch ssrc", RTP_PATCH_STR "Force a fixed SSRC\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_constant_ssrc = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_patch_rtp_ssrc,
      cfg_mgcp_no_patch_rtp_ssrc_cmd,
      "no rtp-patch ssrc", NO_STR RTP_PATCH_STR "Force a fixed SSRC\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_constant_ssrc = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_patch_rtp_ts,
      cfg_mgcp_patch_rtp_ts_cmd,
      "rtp-patch timestamp", RTP_PATCH_STR "Adjust RTP timestamp\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_aligned_timing = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_patch_rtp_ts,
      cfg_mgcp_no_patch_rtp_ts_cmd,
      "no rtp-patch timestamp", NO_STR RTP_PATCH_STR "Adjust RTP timestamp\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_aligned_timing = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_patch_rtp_rfc5993hr,
      cfg_mgcp_patch_rtp_rfc5993hr_cmd,
      "rtp-patch rfc5993hr", RTP_PATCH_STR RTP_TS101318_RFC5993_CONV_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->rfc5993_hr_convert = true;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_patch_rtp_rfc5993hr,
      cfg_mgcp_no_patch_rtp_rfc5993hr_cmd,
      "no rtp-patch rfc5993hr", NO_STR RTP_PATCH_STR RTP_TS101318_RFC5993_CONV_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->rfc5993_hr_convert = false;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_patch_rtp,
      cfg_mgcp_no_patch_rtp_cmd, "no rtp-patch", NO_STR RTP_PATCH_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	trunk->force_constant_ssrc = 0;
	trunk->force_aligned_timing = 0;
	trunk->rfc5993_hr_convert = false;
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_rtp_keepalive,
      cfg_mgcp_rtp_keepalive_cmd,
      "rtp keep-alive <1-120>",
      RTP_STR RTP_KEEPALIVE_STR "Keep alive interval in secs\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	mgcp_trunk_set_keepalive(trunk, atoi(argv[0]));
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_rtp_keepalive_once,
      cfg_mgcp_rtp_keepalive_once_cmd,
      "rtp keep-alive once",
      RTP_STR RTP_KEEPALIVE_STR "Send dummy packet only once after CRCX/MDCX\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_no_rtp_keepalive,
      cfg_mgcp_no_rtp_keepalive_cmd,
      "no rtp keep-alive", NO_STR RTP_STR RTP_KEEPALIVE_STR)
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);
	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_NEVER);
	return CMD_SUCCESS;
}

#define CALL_AGENT_STR "Callagent information\n"
DEFUN(cfg_mgcp_agent_addr,
      cfg_mgcp_agent_addr_cmd,
      "call-agent ip A.B.C.D",
      CALL_AGENT_STR IP_STR "IPv4 Address of the callagent\n")
{
	osmo_talloc_replace_string(g_cfg, &g_cfg->call_agent_addr, argv[0]);
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_mgcp_agent_addr, cfg_mgcp_agent_addr_cmd_old,
		 "call agent ip A.B.C.D",
		 CALL_AGENT_STR CALL_AGENT_STR IP_STR
		 "IPv4 Address of the callagent\n")

DEFUN(cfg_mgcp_trunk, cfg_mgcp_trunk_cmd,
      "trunk <1-64>", "Configure a SS7 trunk\n" "Trunk Nr\n")
{
	struct mgcp_trunk *trunk;
	int index = atoi(argv[0]);

	/* Due to historical reasons, the trunk id number 0 is reserved for the
	 * virtual trunk. This trunk is configured with separate VTY
	 * parameters, so we restrict the access to trunks with id numbers
	 * greater than 0. */

	trunk = mgcp_trunk_by_num(g_cfg, index);
	if (!trunk) {
		trunk = mgcp_trunk_alloc(g_cfg, MGCP_TRUNK_E1, index);
		if (!trunk) {
			vty_out(vty, "%%Unable to allocate trunk %u.%s",
				index, VTY_NEWLINE);
			return CMD_WARNING;
		}
	}

	vty->node = TRUNK_NODE;
	vty->index = trunk;
	return CMD_SUCCESS;
}

static int config_write_trunk(struct vty *vty)
{
	struct mgcp_trunk *trunk;

	llist_for_each_entry(trunk, &g_cfg->trunks, entry) {

		/* Due to historical reasons, the virtual trunk is configured
		   using separate VTY parameters, so we omit writing the trunk
		   config of trunk 0 here. The configuration for the virtual
		   trunk is written by config_write_mgcp(). */

		if (trunk->trunk_nr == MGCP_VIRT_TRUNK_ID)
			continue;

		vty_out(vty, " trunk %d%s", trunk->trunk_nr, VTY_NEWLINE);
		vty_out(vty, "  %ssdp audio-payload send-ptime%s",
			trunk->audio_send_ptime ? "" : "no ", VTY_NEWLINE);
		vty_out(vty, "  %ssdp audio-payload send-name%s",
			trunk->audio_send_name ? "" : "no ", VTY_NEWLINE);

		if (trunk->keepalive_interval == MGCP_KEEPALIVE_ONCE)
			vty_out(vty, "  rtp keep-alive once%s", VTY_NEWLINE);
		else if (trunk->keepalive_interval)
			vty_out(vty, "  rtp keep-alive %d%s",
				trunk->keepalive_interval, VTY_NEWLINE);
		else
			vty_out(vty, "  no rtp keep-alive%s", VTY_NEWLINE);
		vty_out(vty, "  loop %d%s", trunk->audio_loop, VTY_NEWLINE);
		vty_out(vty, "  force-realloc %d%s",
			trunk->force_realloc, VTY_NEWLINE);
		vty_out(vty, "  rtp-accept-all %d%s",
			trunk->rtp_accept_all, VTY_NEWLINE);
		if (trunk->omit_rtcp)
			vty_out(vty, "  rtcp-omit%s", VTY_NEWLINE);
		else
			vty_out(vty, "  no rtcp-omit%s", VTY_NEWLINE);
		if (trunk->force_constant_ssrc || trunk->force_aligned_timing
		    || trunk->rfc5993_hr_convert) {
			vty_out(vty, "  %srtp-patch ssrc%s",
				trunk->force_constant_ssrc ? "" : "no ",
				VTY_NEWLINE);
			vty_out(vty, "  %srtp-patch timestamp%s",
				trunk->force_aligned_timing ? "" : "no ",
				VTY_NEWLINE);
			vty_out(vty, "  %srtp-patch rfc5993hr%s",
				trunk->rfc5993_hr_convert ? "" : "no ",
				VTY_NEWLINE);
		} else
			vty_out(vty, "  no rtp-patch%s", VTY_NEWLINE);
		if (trunk->audio_fmtp_extra)
			vty_out(vty, "   sdp audio fmtp-extra %s%s",
				trunk->audio_fmtp_extra, VTY_NEWLINE);
		vty_out(vty, "  %sallow-transcoding%s",
			trunk->no_audio_transcoding ? "no " : "", VTY_NEWLINE);
	}

	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_sdp_fmtp_extra,
      cfg_trunk_sdp_fmtp_extra_cmd,
      "sdp audio fmtp-extra .NAME",
      "Add extra fmtp for the SDP file\n" "Audio\n" "Fmtp-extra\n"
      "Extra Information\n")
{
	struct mgcp_trunk *trunk = vty->index;
	char *txt = argv_concat(argv, argc, 0);
	if (!txt)
		return CMD_WARNING;

	osmo_talloc_replace_string(g_cfg, &trunk->audio_fmtp_extra, txt);
	talloc_free(txt);
	return CMD_SUCCESS;
}

DEFUN_DEPRECATED(cfg_trunk_payload_number,
      cfg_trunk_payload_number_cmd,
      "sdp audio-payload number <0-255>",
      SDP_STR AUDIO_STR "Number\n" "Payload Number\n")
{
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_trunk_payload_number, cfg_trunk_payload_number_cmd_old,
		 "sdp audio payload number <0-255>",
		 SDP_STR AUDIO_STR AUDIO_STR "Number\n" "Payload Number\n")

DEFUN_DEPRECATED(cfg_trunk_payload_name,
      cfg_trunk_payload_name_cmd,
      "sdp audio-payload name NAME",
      SDP_STR AUDIO_STR "Payload\n" "Payload Name\n")
{
	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(cfg_trunk_payload_name, cfg_trunk_payload_name_cmd_old,
		 "sdp audio payload name NAME",
		 SDP_STR AUDIO_STR AUDIO_STR "Payload\n" "Payload Name\n")

DEFUN(cfg_trunk_loop,
      cfg_trunk_loop_cmd,
      "loop (0|1)",
      "Loop audio for all endpoints on this trunk\n" "Don't Loop\n" "Loop\n")
{
	struct mgcp_trunk *trunk = vty->index;

	if (g_cfg->osmux) {
		vty_out(vty, "Cannot use `loop' with `osmux'.%s", VTY_NEWLINE);
		return CMD_WARNING;
	}
	trunk->audio_loop = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_sdp_payload_send_ptime,
      cfg_trunk_sdp_payload_send_ptime_cmd,
      "sdp audio-payload send-ptime",
      SDP_STR AUDIO_STR "Send SDP ptime (packet duration) attribute\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->audio_send_ptime = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_sdp_payload_send_ptime,
      cfg_trunk_no_sdp_payload_send_ptime_cmd,
      "no sdp audio-payload send-ptime",
      NO_STR SDP_STR AUDIO_STR "Send SDP ptime (packet duration) attribute\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->audio_send_ptime = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_sdp_payload_send_name,
      cfg_trunk_sdp_payload_send_name_cmd,
      "sdp audio-payload send-name",
      SDP_STR AUDIO_STR "Send SDP rtpmap with the audio name\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->audio_send_name = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_sdp_payload_send_name,
      cfg_trunk_no_sdp_payload_send_name_cmd,
      "no sdp audio-payload send-name",
      NO_STR SDP_STR AUDIO_STR "Send SDP rtpmap with the audio name\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->audio_send_name = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_omit_rtcp, cfg_trunk_omit_rtcp_cmd, "rtcp-omit", RTCP_OMIT_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->omit_rtcp = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_omit_rtcp,
      cfg_trunk_no_omit_rtcp_cmd, "no rtcp-omit", NO_STR RTCP_OMIT_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->omit_rtcp = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_patch_rtp_ssrc,
      cfg_trunk_patch_rtp_ssrc_cmd,
      "rtp-patch ssrc", RTP_PATCH_STR "Force a fixed SSRC\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->force_constant_ssrc = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_patch_rtp_ssrc,
      cfg_trunk_no_patch_rtp_ssrc_cmd,
      "no rtp-patch ssrc", NO_STR RTP_PATCH_STR "Force a fixed SSRC\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->force_constant_ssrc = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_patch_rtp_ts,
      cfg_trunk_patch_rtp_ts_cmd,
      "rtp-patch timestamp", RTP_PATCH_STR "Adjust RTP timestamp\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->force_aligned_timing = 1;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_patch_rtp_ts,
      cfg_trunk_no_patch_rtp_ts_cmd,
      "no rtp-patch timestamp", NO_STR RTP_PATCH_STR "Adjust RTP timestamp\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->force_aligned_timing = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_patch_rtp_rfc5993hr,
      cfg_trunk_patch_rtp_rfc5993hr_cmd,
      "rtp-patch rfc5993hr", RTP_PATCH_STR RTP_TS101318_RFC5993_CONV_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->rfc5993_hr_convert = true;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_patch_rtp_rfc5993hr,
      cfg_trunk_no_patch_rtp_rfc5993hr_cmd,
      "no rtp-patch rfc5993hr", NO_STR RTP_PATCH_STR RTP_TS101318_RFC5993_CONV_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->rfc5993_hr_convert = false;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_patch_rtp,
      cfg_trunk_no_patch_rtp_cmd, "no rtp-patch", NO_STR RTP_PATCH_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->force_constant_ssrc = 0;
	trunk->force_aligned_timing = 0;
	trunk->rfc5993_hr_convert = false;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_rtp_keepalive,
      cfg_trunk_rtp_keepalive_cmd,
      "rtp keep-alive <1-120>",
      RTP_STR RTP_KEEPALIVE_STR "Keep-alive interval in secs\n")
{
	struct mgcp_trunk *trunk = vty->index;
	mgcp_trunk_set_keepalive(trunk, atoi(argv[0]));
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_rtp_keepalive_once,
      cfg_trunk_rtp_keepalive_once_cmd,
      "rtp keep-alive once",
      RTP_STR RTP_KEEPALIVE_STR "Send dummy packet only once after CRCX/MDCX\n")
{
	struct mgcp_trunk *trunk = vty->index;
	mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE);
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_rtp_keepalive,
      cfg_trunk_no_rtp_keepalive_cmd,
      "no rtp keep-alive", NO_STR RTP_STR RTP_KEEPALIVE_STR)
{
	struct mgcp_trunk *trunk = vty->index;
	mgcp_trunk_set_keepalive(trunk, 0);
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_allow_transcoding,
      cfg_trunk_allow_transcoding_cmd,
      "allow-transcoding", "Allow transcoding\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->no_audio_transcoding = 0;
	return CMD_SUCCESS;
}

DEFUN(cfg_trunk_no_allow_transcoding,
      cfg_trunk_no_allow_transcoding_cmd,
      "no allow-transcoding", NO_STR "Allow transcoding\n")
{
	struct mgcp_trunk *trunk = vty->index;
	trunk->no_audio_transcoding = 1;
	return CMD_SUCCESS;
}

DEFUN(loop_conn,
      loop_conn_cmd,
      "loop-endpoint <0-64> NAME (0|1)",
      "Loop a given endpoint\n" "Trunk number\n"
      "The name in hex of the endpoint\n" "Disable the loop\n"
      "Enable the loop\n")
{
	struct mgcp_trunk *trunk;
	struct mgcp_endpoint *endp;
	struct mgcp_conn *conn;

	trunk = mgcp_trunk_by_num(g_cfg, atoi(argv[0]));
	if (!trunk) {
		vty_out(vty, "%%Trunk %d not found in the config.%s",
			atoi(argv[0]), VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!trunk->endpoints) {
		vty_out(vty, "%%Trunk %d has no endpoints allocated.%s",
			trunk->trunk_nr, VTY_NEWLINE);
		return CMD_WARNING;
	}

	int endp_no = strtoul(argv[1], NULL, 16);
	if (endp_no < 1 || endp_no >= trunk->number_endpoints) {
		vty_out(vty, "Loopback number %s/%d is invalid.%s",
			argv[1], endp_no, VTY_NEWLINE);
		return CMD_WARNING;
	}

	endp = trunk->endpoints[endp_no];
	int loop = atoi(argv[2]);
	llist_for_each_entry(conn, &endp->conns, entry) {
		if (conn->type == MGCP_CONN_TYPE_RTP)
			/* Handle it like a MDCX, switch on SSRC patching if enabled */
			mgcp_rtp_end_config(endp, 1, &conn->u.rtp.end);
		else {
			/* FIXME: Introduce support for other connection (E1)
			 * types when implementation is available */
			vty_out(vty, "%%Can't enable SSRC patching,"
				"connection %s is not an RTP connection.%s",
				mgcp_conn_dump(conn), VTY_NEWLINE);
		}

		if (loop)
			conn->mode = MGCP_CONN_LOOPBACK;
		else
			conn->mode = conn->mode_orig;
	}

	return CMD_SUCCESS;
}

DEFUN(tap_rtp,
      tap_rtp_cmd,
      "tap-rtp <0-64> ENDPOINT CONN (in|out) A.B.C.D <0-65534>",
      "Forward data on endpoint to a different system\n" "Trunk number\n"
      "The endpoint in hex\n"
      "The connection id in hex\n"
      "Forward incoming data\n"
      "Forward leaving data\n"
      "destination IP of the data\n" "destination port\n")
{
	struct mgcp_rtp_tap *tap;
	struct mgcp_trunk *trunk;
	struct mgcp_endpoint *endp;
	struct mgcp_conn_rtp *conn;
        const char *conn_id = NULL;

	trunk = mgcp_trunk_by_num(g_cfg, atoi(argv[0]));
	if (!trunk) {
		vty_out(vty, "%%Trunk %d not found in the config.%s",
			atoi(argv[0]), VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!trunk->endpoints) {
		vty_out(vty, "%%Trunk %d has no endpoints allocated.%s",
			trunk->trunk_nr, VTY_NEWLINE);
		return CMD_WARNING;
	}

	int endp_no = strtoul(argv[1], NULL, 16);
	if (endp_no < 1 || endp_no >= trunk->number_endpoints) {
		vty_out(vty, "Endpoint number %s/%d is invalid.%s",
			argv[1], endp_no, VTY_NEWLINE);
		return CMD_WARNING;
	}

	endp = trunk->endpoints[endp_no];

	conn_id = argv[2];
	conn = mgcp_conn_get_rtp(endp, conn_id);
	if (!conn) {
		vty_out(vty, "Conn ID %s is invalid.%s",
			conn_id, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (strcmp(argv[3], "in") == 0)
		tap = &conn->tap_in;
	else if (strcmp(argv[3], "out") == 0)
		tap = &conn->tap_out;
	else {
		vty_out(vty, "Unknown mode... tricked vty?%s", VTY_NEWLINE);
		return CMD_WARNING;
	}

	memset(&tap->forward, 0, sizeof(tap->forward));
	inet_aton(argv[4], &tap->forward.sin_addr);
	tap->forward.sin_port = htons(atoi(argv[5]));
	tap->enabled = 1;
	return CMD_SUCCESS;
}

DEFUN(free_endp, free_endp_cmd,
      "free-endpoint <0-64> NUMBER",
      "Free the given endpoint\n" "Trunk number\n" "Endpoint number in hex.\n")
{
	struct mgcp_trunk *trunk;
	struct mgcp_endpoint *endp;

	trunk = mgcp_trunk_by_num(g_cfg, atoi(argv[0]));
	if (!trunk) {
		vty_out(vty, "%%Trunk %d not found in the config.%s",
			atoi(argv[0]), VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!trunk->endpoints) {
		vty_out(vty, "%%Trunk %d has no endpoints allocated.%s",
			trunk->trunk_nr, VTY_NEWLINE);
		return CMD_WARNING;
	}

	int endp_no = strtoul(argv[1], NULL, 16);
	if (endp_no < 1 || endp_no >= trunk->number_endpoints) {
		vty_out(vty, "Endpoint number %s/%d is invalid.%s",
			argv[1], endp_no, VTY_NEWLINE);
		return CMD_WARNING;
	}

	endp = trunk->endpoints[endp_no];
	mgcp_endp_release(endp);
	return CMD_SUCCESS;
}

DEFUN(reset_endp, reset_endp_cmd,
      "reset-endpoint <0-64> NUMBER",
      "Reset the given endpoint\n" "Trunk number\n" "Endpoint number in hex.\n")
{
	struct mgcp_trunk *trunk;
	struct mgcp_endpoint *endp;
	int endp_no, rc;

	trunk = mgcp_trunk_by_num(g_cfg, atoi(argv[0]));
	if (!trunk) {
		vty_out(vty, "%%Trunk %d not found in the config.%s",
			atoi(argv[0]), VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!trunk->endpoints) {
		vty_out(vty, "%%Trunk %d has no endpoints allocated.%s",
			trunk->trunk_nr, VTY_NEWLINE);
		return CMD_WARNING;
	}

	endp_no = strtoul(argv[1], NULL, 16);
	if (endp_no < 1 || endp_no >= trunk->number_endpoints) {
		vty_out(vty, "Endpoint number %s/%d is invalid.%s",
			argv[1], endp_no, VTY_NEWLINE);
		return CMD_WARNING;
	}

	endp = trunk->endpoints[endp_no];
	rc = mgcp_send_reset_ep(endp);
	if (rc < 0) {
		vty_out(vty, "Error %d sending reset.%s", rc, VTY_NEWLINE);
		return CMD_WARNING;
	}
	return CMD_SUCCESS;
}

DEFUN(reset_all_endp, reset_all_endp_cmd,
      "reset-all-endpoints", "Reset all endpoints\n")
{
	int rc;

	rc = mgcp_send_reset_all(g_cfg);
	if (rc < 0) {
		vty_out(vty, "Error %d during endpoint reset.%s",
			rc, VTY_NEWLINE);
		return CMD_WARNING;
	}
	return CMD_SUCCESS;
}

#define OSMUX_STR "RTP multiplexing\n"
DEFUN(cfg_mgcp_osmux,
      cfg_mgcp_osmux_cmd,
      "osmux (on|off|only)",
      OSMUX_STR "Enable OSMUX\n" "Disable OSMUX\n" "Only use OSMUX\n")
{
	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_VIRT_TRUNK_ID);
	OSMO_ASSERT(trunk);

	if (strcmp(argv[0], "off") == 0) {
		g_cfg->osmux = OSMUX_USAGE_OFF;
		return CMD_SUCCESS;
	} else if (strcmp(argv[0], "on") == 0)
		g_cfg->osmux = OSMUX_USAGE_ON;
	else if (strcmp(argv[0], "only") == 0)
		g_cfg->osmux = OSMUX_USAGE_ONLY;

	if (trunk->audio_loop) {
		vty_out(vty, "Cannot use `loop' with `osmux'.%s", VTY_NEWLINE);
		return CMD_WARNING;
	}

	return CMD_SUCCESS;

}

DEFUN(cfg_mgcp_osmux_ip,
      cfg_mgcp_osmux_ip_cmd,
      "osmux bind-ip A.B.C.D", OSMUX_STR IP_STR "IPv4 Address to bind to\n")
{
	osmo_talloc_replace_string(g_cfg, &g_cfg->osmux_addr, argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_osmux_batch_factor,
      cfg_mgcp_osmux_batch_factor_cmd,
      "osmux batch-factor <1-8>",
      OSMUX_STR "Batching factor\n" "Number of messages in the batch\n")
{
	g_cfg->osmux_batch = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_osmux_batch_size,
      cfg_mgcp_osmux_batch_size_cmd,
      "osmux batch-size <1-65535>",
      OSMUX_STR "batch size\n" "Batch size in bytes\n")
{
	g_cfg->osmux_batch_size = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_osmux_port,
      cfg_mgcp_osmux_port_cmd,
      "osmux port <1-65535>", OSMUX_STR "port\n" "UDP port\n")
{
	g_cfg->osmux_port = atoi(argv[0]);
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_osmux_dummy,
      cfg_mgcp_osmux_dummy_cmd,
      "osmux dummy (on|off)",
      OSMUX_STR "Dummy padding\n" "Enable dummy padding\n"
      "Disable dummy padding\n")
{
	if (strcmp(argv[0], "on") == 0)
		g_cfg->osmux_dummy = 1;
	else if (strcmp(argv[0], "off") == 0)
		g_cfg->osmux_dummy = 0;

	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_domain,
      cfg_mgcp_domain_cmd,
      "domain NAME",
      "Set the domain part expected in MGCP messages' endpoint names\n"
      "Qualified domain name expected in MGCP endpoint names, or '*' to accept any domain\n")
{
	osmo_strlcpy(g_cfg->domain, argv[0], sizeof(g_cfg->domain));
	return CMD_SUCCESS;
}

DEFUN(cfg_mgcp_conn_timeout,
      cfg_mgcp_conn_timeout_cmd,
      "conn-timeout <0-65534>",
      "Set a time after which inactive connections (CIs) are closed. Set to 0 to disable timeout. This can be used to"
      " work around interoperability problems causing connections to stay open forever, and slowly exhausting all"
      " available ports. Enable keep-alive packets in MGW clients when using this option together with LCLS (OsmoBSC,"
      " OsmoMSC: 'rtp keep-alive')!\n"
      "Timeout value (sec.)\n")
{
	g_cfg->conn_timeout = strtoul(argv[0], NULL, 10);
	return CMD_SUCCESS;
}

int mgcp_vty_init(void)
{
	install_element_ve(&show_mgcp_cmd);
	install_element_ve(&show_mgcp_endpoint_cmd);
	install_element_ve(&show_mgcp_trunk_endpoint_cmd);
	install_element(ENABLE_NODE, &loop_conn_cmd);
	install_element(ENABLE_NODE, &tap_rtp_cmd);
	install_element(ENABLE_NODE, &free_endp_cmd);
	install_element(ENABLE_NODE, &reset_endp_cmd);
	install_element(ENABLE_NODE, &reset_all_endp_cmd);

	install_element(CONFIG_NODE, &cfg_mgcp_cmd);
	install_node(&mgcp_node, config_write_mgcp);

	install_element(MGCP_NODE, &cfg_mgcp_local_ip_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_bind_ip_cmd);
	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);
	install_element(MGCP_NODE, &cfg_mgcp_rtp_ip_tos_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_rtp_force_ptime_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_rtp_force_ptime_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_rtp_keepalive_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_rtp_keepalive_once_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_rtp_keepalive_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_agent_addr_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_agent_addr_cmd_old);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_number_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_name_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_number_cmd_old);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_name_cmd_old);
	install_element(MGCP_NODE, &cfg_mgcp_loop_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_force_realloc_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_rtp_accept_all_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_number_endp_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_omit_rtcp_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_omit_rtcp_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_patch_rtp_ssrc_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_patch_rtp_ssrc_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_patch_rtp_ts_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_patch_rtp_ts_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_patch_rtp_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_patch_rtp_rfc5993hr_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_patch_rtp_rfc5993hr_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_fmtp_extra_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_send_ptime_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_sdp_payload_send_ptime_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_send_name_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_sdp_payload_send_name_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_ip_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_batch_factor_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_batch_size_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_port_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_osmux_dummy_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_allow_transcoding_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_no_allow_transcoding_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_domain_cmd);
	install_element(MGCP_NODE, &cfg_mgcp_conn_timeout_cmd);

	install_element(MGCP_NODE, &cfg_mgcp_trunk_cmd);
	install_node(&trunk_node, config_write_trunk);
	install_element(TRUNK_NODE, &cfg_trunk_rtp_keepalive_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_rtp_keepalive_once_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_rtp_keepalive_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_payload_number_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_payload_name_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_payload_number_cmd_old);
	install_element(TRUNK_NODE, &cfg_trunk_payload_name_cmd_old);
	install_element(TRUNK_NODE, &cfg_trunk_loop_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_omit_rtcp_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_omit_rtcp_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_patch_rtp_ssrc_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_patch_rtp_ssrc_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_patch_rtp_ts_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_patch_rtp_rfc5993hr_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_patch_rtp_rfc5993hr_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_patch_rtp_ts_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_patch_rtp_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_sdp_fmtp_extra_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_sdp_payload_send_ptime_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_sdp_payload_send_ptime_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_sdp_payload_send_name_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_sdp_payload_send_name_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_allow_transcoding_cmd);
	install_element(TRUNK_NODE, &cfg_trunk_no_allow_transcoding_cmd);

	return 0;
}

int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg,
		      enum mgcp_role role)
{
	int rc;
	struct mgcp_trunk *trunk;

	cfg->osmux_port = OSMUX_PORT;
	cfg->osmux_batch = 4;
	cfg->osmux_batch_size = OSMUX_BATCH_DEFAULT_MAX;

	g_cfg = cfg;
	rc = vty_read_config_file(config_file, NULL);
	if (rc < 0) {
		fprintf(stderr, "Failed to parse the config file: '%s'\n",
			config_file);
		return rc;
	}

	if (!g_cfg->source_addr) {
		fprintf(stderr, "You need to specify a bind address.\n");
		return -1;
	}

	llist_for_each_entry(trunk, &g_cfg->trunks, entry) {
		if (mgcp_trunk_alloc_endpts(trunk) != 0) {
			LOGP(DLMGCP, LOGL_ERROR,
			     "Failed to initialize trunk %d (%d endpoints)\n",
			     trunk->trunk_nr, trunk->number_endpoints);
			return -1;
		}
	}
	cfg->role = role;

	return 0;
}