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