| /* 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 <openbsc/vty.h> |
| |
| #include <osmocom/vty/command.h> |
| #include <osmocom/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); |
| |
| if (g_cfg->bts_ports.mode == PORT_ALLOC_STATIC) |
| vty_out(vty, " rtp bts-base %u%s", g_cfg->bts_ports.base_port, VTY_NEWLINE); |
| else |
| vty_out(vty, " rtp bts-range %u %u%s", |
| g_cfg->bts_ports.range_start, g_cfg->bts_ports.range_end, VTY_NEWLINE); |
| |
| if (g_cfg->net_ports.mode == PORT_ALLOC_STATIC) |
| vty_out(vty, " rtp net-base %u%s", g_cfg->net_ports.base_port, VTY_NEWLINE); |
| else |
| vty_out(vty, " rtp net-range %u %u%s", |
| g_cfg->net_ports.range_start, g_cfg->net_ports.range_end, VTY_NEWLINE); |
| |
| vty_out(vty, " rtp ip-dscp %d%s", g_cfg->endp_dscp, 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->call_agent_addr) |
| vty_out(vty, " call agent ip %s%s", g_cfg->call_agent_addr, VTY_NEWLINE); |
| if (g_cfg->transcoder_ip) |
| vty_out(vty, " transcoder-mgw %s%s", g_cfg->transcoder_ip, VTY_NEWLINE); |
| |
| if (g_cfg->transcoder_ports.mode == PORT_ALLOC_STATIC) |
| vty_out(vty, " rtp transcoder-base %u%s", g_cfg->transcoder_ports.base_port, VTY_NEWLINE); |
| else |
| vty_out(vty, " rtp transcoder-range %u %u%s", |
| g_cfg->transcoder_ports.range_start, g_cfg->transcoder_ports.range_end, VTY_NEWLINE); |
| vty_out(vty, " transcoder-remote-base %u%s", g_cfg->transcoder_remote_base, 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/%u remote: %u/%u transcoder: %u/%u%s", |
| i, endp->ci, |
| ntohs(endp->net_end.rtp_port), ntohs(endp->net_end.rtcp_port), |
| ntohs(endp->bts_end.rtp_port), ntohs(endp->bts_end.rtcp_port), |
| inet_ntoa(endp->bts_end.addr), |
| endp->bts_end.packets, endp->bts_state.lost_no, |
| endp->net_end.packets, endp->net_state.lost_no, |
| endp->trans_net.packets, endp->trans_bts.packets, |
| 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 A.B.C.D", |
| "Set the IP to be used in SDP records") |
| { |
| bsc_replace_string(g_cfg, &g_cfg->local_ip, argv[0]); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_bts_ip, |
| cfg_mgcp_bts_ip_cmd, |
| "bts ip A.B.C.D", |
| "Set the IP of the BTS for RTP forwarding") |
| { |
| bsc_replace_string(g_cfg, &g_cfg->bts_ip, 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 A.B.C.D", |
| "Bind the MGCP to this local addr") |
| { |
| bsc_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 the MGCP to this port") |
| { |
| 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 all RTP ports early") |
| { |
| vty_out(vty, "bind early is deprecated, remove it from the config.\n"); |
| return CMD_WARNING; |
| } |
| |
| static void parse_base(struct mgcp_port_range *range, const char **argv) |
| { |
| unsigned int port = atoi(argv[0]); |
| range->mode = PORT_ALLOC_STATIC; |
| range->base_port = port; |
| } |
| |
| static void parse_range(struct mgcp_port_range *range, const char **argv) |
| { |
| range->mode = PORT_ALLOC_DYNAMIC; |
| range->range_start = atoi(argv[0]); |
| range->range_end = atoi(argv[1]); |
| range->last_port = g_cfg->bts_ports.range_start; |
| } |
| |
| |
| DEFUN(cfg_mgcp_rtp_bts_base_port, |
| cfg_mgcp_rtp_bts_base_port_cmd, |
| "rtp bts-base <0-65534>", |
| "Base port to use") |
| { |
| parse_base(&g_cfg->bts_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_rtp_bts_range, |
| cfg_mgcp_rtp_bts_range_cmd, |
| "rtp bts-range <0-65534> <0-65534>", |
| "Range of ports to allocate for endpoints\n" |
| "Start of the range of ports\n" "End of the range of ports\n") |
| { |
| parse_range(&g_cfg->bts_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_rtp_net_range, |
| cfg_mgcp_rtp_net_range_cmd, |
| "rtp net-range <0-65534> <0-65534>", |
| "Range of ports to allocate for endpoints\n" |
| "Start of the range of ports\n" "End of the range of ports\n") |
| { |
| parse_range(&g_cfg->net_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_rtp_net_base_port, |
| cfg_mgcp_rtp_net_base_port_cmd, |
| "rtp net-base <0-65534>", |
| "Base port to use for network port\n" "Port\n") |
| { |
| parse_base(&g_cfg->net_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| ALIAS_DEPRECATED(cfg_mgcp_rtp_bts_base_port, cfg_mgcp_rtp_base_port_cmd, |
| "rtp base <0-65534>", "Base port to use") |
| |
| DEFUN(cfg_mgcp_rtp_transcoder_range, |
| cfg_mgcp_rtp_transcoder_range_cmd, |
| "rtp transcoder-range <0-65534> <0-65534>", |
| "Range of ports to allocate for the transcoder\n" |
| "Start of the range of ports\n" "End of the range of ports\n") |
| { |
| parse_range(&g_cfg->transcoder_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_rtp_transcoder_base, |
| cfg_mgcp_rtp_transcoder_base_cmd, |
| "rtp transcoder-base <0-65534>", |
| "Base port for the transcoder range\n" "Port\n") |
| { |
| parse_base(&g_cfg->transcoder_ports, argv); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_rtp_ip_dscp, |
| cfg_mgcp_rtp_ip_dscp_cmd, |
| "rtp ip-dscp <0-255>", |
| "Set the IP_TOS socket attribute on the RTP/RTCP sockets.\n" "The DSCP value.") |
| { |
| 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>", |
| "Set the IP_TOS socket attribute on the RTP/RTCP sockets.\n" "The DSCP value.") |
| |
| |
| 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]); |
| 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") |
| { |
| bsc_replace_string(g_cfg, &g_cfg->audio_name, 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_agent_addr, |
| cfg_mgcp_agent_addr_cmd, |
| "call agent ip IP", |
| "Set the address of the call agent.") |
| { |
| bsc_replace_string(g_cfg, &g_cfg->call_agent_addr, argv[0]); |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_transcoder, |
| cfg_mgcp_transcoder_cmd, |
| "transcoder-mgw A.B.C.D", |
| "Use a MGW to detranscoder RTP\n" |
| "The IP address of the MGW") |
| { |
| bsc_replace_string(g_cfg, &g_cfg->transcoder_ip, argv[0]); |
| inet_aton(g_cfg->transcoder_ip, &g_cfg->transcoder_in); |
| |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_no_transcoder, |
| cfg_mgcp_no_transcoder_cmd, |
| NO_STR "transcoder-mgw", |
| "Disable the transcoding\n") |
| { |
| if (g_cfg->transcoder_ip) { |
| LOGP(DMGCP, LOGL_NOTICE, "Disabling transcoding on future calls.\n"); |
| talloc_free(g_cfg->transcoder_ip); |
| g_cfg->transcoder_ip = NULL; |
| } |
| |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(cfg_mgcp_transcoder_remote_base, |
| cfg_mgcp_transcoder_remote_base_cmd, |
| "transcoder-remote-base <0-65534>", |
| "Set the base port for the transcoder\n" "The RTP base port on the transcoder") |
| { |
| g_cfg->transcoder_remote_base = atoi(argv[0]); |
| return CMD_SUCCESS; |
| } |
| |
| |
| DEFUN(loop_endp, |
| loop_endp_cmd, |
| "loop-endpoint NAME (0|1)", |
| "Loop a given endpoint\n" |
| "The name in hex of the endpoint\n" "Disable the loop\n" "Enable the loop\n") |
| { |
| struct mgcp_endpoint *endp; |
| |
| int endp_no = strtoul(argv[0], NULL, 16); |
| if (endp_no < 1 || endp_no >= g_cfg->number_endpoints) { |
| vty_out(vty, "Loopback number %s/%d is invalid.%s", |
| argv[0], endp_no, VTY_NEWLINE); |
| return CMD_WARNING; |
| } |
| |
| |
| endp = &g_cfg->endpoints[endp_no]; |
| int loop = atoi(argv[1]); |
| |
| if (loop) |
| endp->conn_mode = MGCP_CONN_LOOPBACK; |
| else |
| endp->conn_mode = endp->orig_mode; |
| endp->allow_patch = 1; |
| |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(tap_call, |
| tap_call_cmd, |
| "tap-call ENDPOINT (bts-in|bts-out|net-in|net-out) A.B.C.D <0-65534>", |
| "Forward data on endpoint to a different system\n" |
| "The endpoint in hex\n" |
| "Forward the data coming from the bts\n" |
| "Forward the data coming from the bts leaving to the network\n" |
| "Forward the data coming from the net\n" |
| "Forward the data coming from the net leaving to the bts\n" |
| "destination IP of the data\n" "destination port\n") |
| { |
| struct mgcp_rtp_tap *tap; |
| struct mgcp_endpoint *endp; |
| int port = 0; |
| |
| int endp_no = strtoul(argv[0], NULL, 16); |
| if (endp_no < 1 || endp_no >= g_cfg->number_endpoints) { |
| vty_out(vty, "Endpoint number %s/%d is invalid.%s", |
| argv[0], endp_no, VTY_NEWLINE); |
| return CMD_WARNING; |
| } |
| |
| endp = &g_cfg->endpoints[endp_no]; |
| |
| if (strcmp(argv[1], "bts-in") == 0) { |
| port = MGCP_TAP_BTS_IN; |
| } else if (strcmp(argv[1], "bts-out") == 0) { |
| port = MGCP_TAP_BTS_OUT; |
| } else if (strcmp(argv[1], "net-in") == 0) { |
| port = MGCP_TAP_NET_IN; |
| } else if (strcmp(argv[1], "net-out") == 0) { |
| port = MGCP_TAP_NET_OUT; |
| } else { |
| vty_out(vty, "Unknown mode... tricked vty?%s", VTY_NEWLINE); |
| return CMD_WARNING; |
| } |
| |
| tap = &endp->taps[port]; |
| memset(&tap->forward, 0, sizeof(tap->forward)); |
| inet_aton(argv[2], &tap->forward.sin_addr); |
| tap->forward.sin_port = htons(atoi(argv[3])); |
| tap->enabled = 1; |
| return CMD_SUCCESS; |
| } |
| |
| DEFUN(free_endp, free_endp_cmd, |
| "free-endpoint NUMBER", |
| "Free the given endpoint\n" "Endpoint number in hex.\n") |
| { |
| struct mgcp_endpoint *endp; |
| |
| int endp_no = strtoul(argv[0], NULL, 16); |
| if (endp_no < 1 || endp_no >= g_cfg->number_endpoints) { |
| vty_out(vty, "Endpoint number %s/%d is invalid.%s", |
| argv[0], endp_no, VTY_NEWLINE); |
| return CMD_WARNING; |
| } |
| |
| endp = &g_cfg->endpoints[endp_no]; |
| mgcp_free_endp(endp); |
| return CMD_SUCCESS; |
| } |
| |
| int mgcp_vty_init(void) |
| { |
| install_element_ve(&show_mgcp_cmd); |
| install_element(ENABLE_NODE, &loop_endp_cmd); |
| install_element(ENABLE_NODE, &tap_call_cmd); |
| install_element(ENABLE_NODE, &free_endp_cmd); |
| |
| install_element(CONFIG_NODE, &cfg_mgcp_cmd); |
| install_node(&mgcp_node, config_write_mgcp); |
| |
| install_default(MGCP_NODE); |
| install_element(MGCP_NODE, &ournode_exit_cmd); |
| install_element(MGCP_NODE, &ournode_end_cmd); |
| 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_rtp_bts_base_port_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_rtp_net_base_port_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_rtp_bts_range_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_rtp_net_range_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_rtp_transcoder_range_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_rtp_transcoder_base_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_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_agent_addr_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_transcoder_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_no_transcoder_cmd); |
| install_element(MGCP_NODE, &cfg_mgcp_transcoder_remote_base_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, NULL); |
| 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; |
| } |
| |
| /* early bind */ |
| for (i = 1; i < g_cfg->number_endpoints; ++i) { |
| struct mgcp_endpoint *endp = &g_cfg->endpoints[i]; |
| int rtp_port; |
| |
| if (g_cfg->bts_ports.mode == PORT_ALLOC_STATIC) { |
| rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), |
| g_cfg->bts_ports.base_port); |
| if (mgcp_bind_bts_rtp_port(endp, rtp_port) != 0) { |
| LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port); |
| return -1; |
| } |
| endp->bts_end.local_alloc = PORT_ALLOC_STATIC; |
| } |
| |
| if (g_cfg->net_ports.mode == PORT_ALLOC_STATIC) { |
| rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), |
| g_cfg->net_ports.base_port); |
| if (mgcp_bind_net_rtp_port(endp, rtp_port) != 0) { |
| LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port); |
| return -1; |
| } |
| endp->net_end.local_alloc = PORT_ALLOC_STATIC; |
| } |
| |
| if (g_cfg->transcoder_ip && g_cfg->transcoder_ports.mode == PORT_ALLOC_STATIC) { |
| /* network side */ |
| rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), |
| g_cfg->transcoder_ports.base_port); |
| if (mgcp_bind_trans_net_rtp_port(endp, rtp_port) != 0) { |
| LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port); |
| return -1; |
| } |
| endp->trans_net.local_alloc = PORT_ALLOC_STATIC; |
| |
| /* bts side */ |
| rtp_port = rtp_calculate_port(endp_back_channel(ENDPOINT_NUMBER(endp)), |
| g_cfg->transcoder_ports.base_port); |
| if (mgcp_bind_trans_bts_rtp_port(endp, rtp_port) != 0) { |
| LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port); |
| return -1; |
| } |
| endp->trans_bts.local_alloc = PORT_ALLOC_STATIC; |
| } |
| } |
| |
| return 0; |
| } |
| |