2010-02-20 20:21:02 +00:00
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/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
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/* The protocol implementation */
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/*
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* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2010 by On-Waves
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <sys/types.h>
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2010-02-26 19:16:37 +00:00
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#include <osmocore/talloc.h>
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2010-02-20 20:21:02 +00:00
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#include <openbsc/debug.h>
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#include <openbsc/mgcp.h>
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#include <openbsc/mgcp_internal.h>
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#include <vty/command.h>
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#include <vty/vty.h>
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2010-04-16 14:59:48 +00:00
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#include <string.h>
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2010-02-20 20:21:02 +00:00
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static struct mgcp_config *g_cfg = NULL;
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/*
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* vty code for mgcp below
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*/
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struct cmd_node mgcp_node = {
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MGCP_NODE,
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"%s(mgcp)#",
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1,
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};
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static int config_write_mgcp(struct vty *vty)
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{
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vty_out(vty, "mgcp%s", VTY_NEWLINE);
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if (g_cfg->local_ip)
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2010-04-16 14:59:48 +00:00
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vty_out(vty, " local ip %s%s", g_cfg->local_ip, VTY_NEWLINE);
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if (g_cfg->bts_ip && strlen(g_cfg->bts_ip) != 0)
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2010-02-20 20:21:02 +00:00
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vty_out(vty, " bts ip %s%s", g_cfg->bts_ip, VTY_NEWLINE);
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vty_out(vty, " bind ip %s%s", g_cfg->source_addr, VTY_NEWLINE);
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vty_out(vty, " bind port %u%s", g_cfg->source_port, VTY_NEWLINE);
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vty_out(vty, " bind early %u%s", !!g_cfg->early_bind, VTY_NEWLINE);
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vty_out(vty, " rtp base %u%s", g_cfg->rtp_base_port, VTY_NEWLINE);
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2010-04-13 07:28:40 +00:00
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if (g_cfg->audio_payload != -1)
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vty_out(vty, " sdp audio payload number %d%s", g_cfg->audio_payload, VTY_NEWLINE);
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if (g_cfg->audio_name)
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vty_out(vty, " sdp audio payload name %s%s", g_cfg->audio_name, VTY_NEWLINE);
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2010-02-20 20:21:02 +00:00
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vty_out(vty, " loop %u%s", !!g_cfg->audio_loop, VTY_NEWLINE);
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2010-04-16 14:59:48 +00:00
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vty_out(vty, " number endpoints %u%s", g_cfg->number_endpoints - 1, VTY_NEWLINE);
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2010-02-20 20:21:02 +00:00
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if (g_cfg->forward_ip)
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2010-04-16 14:59:48 +00:00
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vty_out(vty, " forward audio ip %s%s", g_cfg->forward_ip, VTY_NEWLINE);
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2010-02-20 20:21:02 +00:00
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if (g_cfg->forward_port != 0)
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2010-04-16 14:59:48 +00:00
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vty_out(vty, " forward audio port %d%s", g_cfg->forward_port, VTY_NEWLINE);
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2010-03-31 09:46:41 +00:00
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if (g_cfg->call_agent_addr)
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2010-04-16 14:59:48 +00:00
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vty_out(vty, " call agent ip %s%s", g_cfg->call_agent_addr, VTY_NEWLINE);
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2010-02-20 20:21:02 +00:00
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return CMD_SUCCESS;
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}
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DEFUN(show_mcgp, show_mgcp_cmd, "show mgcp",
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SHOW_STR "Display information about the MGCP Media Gateway")
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{
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int i;
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vty_out(vty, "MGCP is up and running with %u endpoints:%s", g_cfg->number_endpoints - 1, VTY_NEWLINE);
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for (i = 1; i < g_cfg->number_endpoints; ++i) {
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struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
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2010-04-09 16:53:24 +00:00
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vty_out(vty, " Endpoint 0x%.2x: CI: %d net: %u/%u bts: %u/%u on %s traffic received bts: %u remote: %u%s",
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2010-02-20 20:21:02 +00:00
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i, endp->ci,
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ntohs(endp->net_rtp), ntohs(endp->net_rtcp),
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2010-04-05 07:00:53 +00:00
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ntohs(endp->bts_rtp), ntohs(endp->bts_rtcp),
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2010-04-07 07:37:17 +00:00
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inet_ntoa(endp->bts), endp->in_bts, endp->in_remote,
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VTY_NEWLINE);
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2010-02-20 20:21:02 +00:00
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}
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp,
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cfg_mgcp_cmd,
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"mgcp",
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"Configure the MGCP")
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{
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vty->node = MGCP_NODE;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_local_ip,
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cfg_mgcp_local_ip_cmd,
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2010-05-13 18:27:50 +00:00
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"local ip A.B.C.D",
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2010-02-20 20:21:02 +00:00
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"Set the IP to be used in SDP records")
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{
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if (g_cfg->local_ip)
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talloc_free(g_cfg->local_ip);
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g_cfg->local_ip = talloc_strdup(g_cfg, argv[0]);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_bts_ip,
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cfg_mgcp_bts_ip_cmd,
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2010-05-13 18:27:50 +00:00
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"bts ip A.B.C.D",
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2010-02-20 20:21:02 +00:00
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"Set the IP of the BTS for RTP forwarding")
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{
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if (g_cfg->bts_ip)
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talloc_free(g_cfg->bts_ip);
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g_cfg->bts_ip = talloc_strdup(g_cfg, argv[0]);
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inet_aton(g_cfg->bts_ip, &g_cfg->bts_in);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_bind_ip,
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cfg_mgcp_bind_ip_cmd,
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2010-05-13 18:27:50 +00:00
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"bind ip A.B.C.D",
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2010-02-20 20:21:02 +00:00
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"Bind the MGCP to this local addr")
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{
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if (g_cfg->source_addr)
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talloc_free(g_cfg->source_addr);
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g_cfg->source_addr = talloc_strdup(g_cfg, argv[0]);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_bind_port,
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cfg_mgcp_bind_port_cmd,
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"bind port <0-65534>",
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"Bind the MGCP to this port")
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{
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unsigned int port = atoi(argv[0]);
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g_cfg->source_port = port;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_bind_early,
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cfg_mgcp_bind_early_cmd,
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"bind early (0|1)",
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"Bind all RTP ports early")
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{
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unsigned int bind = atoi(argv[0]);
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g_cfg->early_bind = bind == 1;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_rtp_base_port,
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cfg_mgcp_rtp_base_port_cmd,
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"rtp base <0-65534>",
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"Base port to use")
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{
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unsigned int port = atoi(argv[0]);
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g_cfg->rtp_base_port = port;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_sdp_payload_number,
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cfg_mgcp_sdp_payload_number_cmd,
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"sdp audio payload number <1-255>",
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"Set the audio codec to use")
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{
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unsigned int payload = atoi(argv[0]);
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g_cfg->audio_payload = payload;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_sdp_payload_name,
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cfg_mgcp_sdp_payload_name_cmd,
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"sdp audio payload name NAME",
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"Set the audio name to use")
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{
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if (g_cfg->audio_name)
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talloc_free(g_cfg->audio_name);
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g_cfg->audio_name = talloc_strdup(g_cfg, argv[0]);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_loop,
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cfg_mgcp_loop_cmd,
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"loop (0|1)",
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"Loop the audio")
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{
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g_cfg->audio_loop = atoi(argv[0]);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_number_endp,
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cfg_mgcp_number_endp_cmd,
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"number endpoints <0-65534>",
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"The number of endpoints to allocate. This is not dynamic.")
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{
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/* + 1 as we start counting at one */
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g_cfg->number_endpoints = atoi(argv[0]) + 1;
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_forward_ip,
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cfg_mgcp_forward_ip_cmd,
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2010-05-13 18:27:50 +00:00
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"forward audio ip A.B.C.D",
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2010-02-20 20:21:02 +00:00
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"Forward packets from and to the IP. This disables most of the MGCP feature.")
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{
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if (g_cfg->forward_ip)
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talloc_free(g_cfg->forward_ip);
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g_cfg->forward_ip = talloc_strdup(g_cfg, argv[0]);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_mgcp_forward_port,
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cfg_mgcp_forward_port_cmd,
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"forward audio port <1-15000>",
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"Forward packets from and to the port. This disables most of the MGCP feature.")
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{
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g_cfg->forward_port = atoi(argv[0]);
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return CMD_SUCCESS;
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}
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2010-03-31 09:46:41 +00:00
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DEFUN(cfg_mgcp_agent_addr,
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cfg_mgcp_agent_addr_cmd,
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"call agent ip IP",
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"Set the address of the call agent.")
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{
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if (g_cfg->call_agent_addr)
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talloc_free(g_cfg->call_agent_addr);
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g_cfg->call_agent_addr = talloc_strdup(g_cfg, argv[0]);
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return CMD_SUCCESS;
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}
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2010-02-20 20:21:02 +00:00
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int mgcp_vty_init(void)
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{
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2010-05-13 18:45:52 +00:00
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install_element_ve(&show_mgcp_cmd);
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2010-02-20 20:21:02 +00:00
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install_element(CONFIG_NODE, &cfg_mgcp_cmd);
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install_node(&mgcp_node, config_write_mgcp);
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install_default(MGCP_NODE);
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install_element(MGCP_NODE, &cfg_mgcp_local_ip_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_bts_ip_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_bind_ip_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_bind_port_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_bind_early_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_rtp_base_port_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_number_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_name_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_loop_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_number_endp_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_forward_ip_cmd);
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install_element(MGCP_NODE, &cfg_mgcp_forward_port_cmd);
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2010-03-31 09:46:41 +00:00
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install_element(MGCP_NODE, &cfg_mgcp_agent_addr_cmd);
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2010-02-20 20:21:02 +00:00
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return 0;
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}
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int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg)
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{
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int i, rc;
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g_cfg = cfg;
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rc = vty_read_config_file(config_file);
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if (rc < 0) {
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fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
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return rc;
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}
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if (!g_cfg->bts_ip)
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fprintf(stderr, "No BTS ip address specified. This will allow everyone to connect.\n");
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2010-03-30 11:00:10 +00:00
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if (!g_cfg->source_addr) {
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fprintf(stderr, "You need to specify a bind address.\n");
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return -1;
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}
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2010-02-20 20:21:02 +00:00
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if (mgcp_endpoints_allocate(g_cfg) != 0) {
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fprintf(stderr, "Failed to allocate endpoints: %d. Quitting.\n", g_cfg->number_endpoints);
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return -1;
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}
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/*
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* This application supports two modes.
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2010-04-30 05:32:05 +00:00
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* 1.) a true MGCP gateway with support for AUEP, CRCX, MDCX, DLCX
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* 2.) plain forwarding of RTP packets on the endpoints.
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2010-02-20 20:21:02 +00:00
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* both modes are mutual exclusive
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*/
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if (g_cfg->forward_ip) {
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int port = g_cfg->rtp_base_port;
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if (g_cfg->forward_port != 0)
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port = g_cfg->forward_port;
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if (!g_cfg->early_bind) {
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LOGP(DMGCP, LOGL_NOTICE, "Forwarding requires early bind.\n");
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return -1;
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}
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/*
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* Store the forward IP and assign a ci. For early bind
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* the sockets will be created after this.
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*/
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for (i = 1; i < g_cfg->number_endpoints; ++i) {
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struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
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inet_aton(g_cfg->forward_ip, &endp->remote);
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endp->ci = CI_UNUSED + 23;
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endp->net_rtp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port));
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endp->net_rtcp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port) + 1);
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}
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LOGP(DMGCP, LOGL_NOTICE, "Configured for Audio Forwarding.\n");
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}
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|
|
|
|
/* early bind */
|
|
|
|
if (g_cfg->early_bind) {
|
|
|
|
for (i = 1; i < g_cfg->number_endpoints; ++i) {
|
|
|
|
struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
|
|
|
|
int rtp_port;
|
|
|
|
|
|
|
|
rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), g_cfg->rtp_base_port);
|
|
|
|
if (mgcp_bind_rtp_port(endp, rtp_port) != 0) {
|
2010-02-26 12:10:51 +00:00
|
|
|
LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port);
|
2010-02-20 20:21:02 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return !!g_cfg->forward_ip;
|
|
|
|
}
|
|
|
|
|