Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
| 5 | * (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2010 by On-Waves |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <sys/types.h> |
| 26 | |
| 27 | #include <cellmgr_debug.h> |
| 28 | |
| 29 | #include <mgcp/mgcp.h> |
| 30 | #include <mgcp/mgcp_internal.h> |
| 31 | |
| 32 | #include <osmocore/talloc.h> |
| 33 | |
| 34 | #include <osmocom/vty/command.h> |
| 35 | #include <osmocom/vty/vty.h> |
| 36 | |
| 37 | #include <string.h> |
| 38 | |
| 39 | static struct mgcp_config *g_cfg = NULL; |
| 40 | |
| 41 | enum cellmgr_node { |
| 42 | MGCP_NODE = _LAST_OSMOVTY_NODE + 1, |
| 43 | }; |
| 44 | |
| 45 | /* |
| 46 | * vty code for mgcp below |
| 47 | */ |
| 48 | static struct cmd_node mgcp_node = { |
| 49 | MGCP_NODE, |
| 50 | "%s(mgcp)#", |
| 51 | 1, |
| 52 | }; |
| 53 | |
| 54 | static int config_write_mgcp(struct vty *vty) |
| 55 | { |
| 56 | vty_out(vty, "mgcp%s", VTY_NEWLINE); |
| 57 | if (g_cfg->local_ip) |
| 58 | vty_out(vty, " local ip %s%s", g_cfg->local_ip, VTY_NEWLINE); |
| 59 | if (g_cfg->bts_ip && strlen(g_cfg->bts_ip) != 0) |
Holger Hans Peter Freyther | a174318 | 2010-08-04 07:28:39 +0800 | [diff] [blame^] | 60 | vty_out(vty, " mgw ip %s%s", g_cfg->bts_ip, VTY_NEWLINE); |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 61 | vty_out(vty, " bind ip %s%s", g_cfg->source_addr, VTY_NEWLINE); |
| 62 | vty_out(vty, " bind port %u%s", g_cfg->source_port, VTY_NEWLINE); |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 63 | vty_out(vty, " rtp base %u%s", g_cfg->rtp_base_port, VTY_NEWLINE); |
| 64 | vty_out(vty, " rtp ip-dscp %d%s", g_cfg->endp_dscp, VTY_NEWLINE); |
| 65 | if (g_cfg->audio_payload != -1) |
| 66 | vty_out(vty, " sdp audio payload number %d%s", g_cfg->audio_payload, VTY_NEWLINE); |
| 67 | if (g_cfg->audio_name) |
| 68 | vty_out(vty, " sdp audio payload name %s%s", g_cfg->audio_name, VTY_NEWLINE); |
| 69 | vty_out(vty, " loop %u%s", !!g_cfg->audio_loop, VTY_NEWLINE); |
| 70 | vty_out(vty, " number endpoints %u%s", g_cfg->number_endpoints - 1, VTY_NEWLINE); |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 71 | |
| 72 | return CMD_SUCCESS; |
| 73 | } |
| 74 | |
| 75 | DEFUN(show_mcgp, show_mgcp_cmd, "show mgcp", |
| 76 | SHOW_STR "Display information about the MGCP Media Gateway") |
| 77 | { |
| 78 | int i; |
| 79 | |
| 80 | vty_out(vty, "MGCP is up and running with %u endpoints:%s", g_cfg->number_endpoints - 1, VTY_NEWLINE); |
| 81 | for (i = 1; i < g_cfg->number_endpoints; ++i) { |
| 82 | struct mgcp_endpoint *endp = &g_cfg->endpoints[i]; |
| 83 | vty_out(vty, " Endpoint 0x%.2x: CI: %d net: %u/%u bts: %u/%u on %s traffic received bts: %u/%u remote: %u/%u%s", |
| 84 | i, endp->ci, |
| 85 | ntohs(endp->net_rtp), ntohs(endp->net_rtcp), |
| 86 | ntohs(endp->bts_rtp), ntohs(endp->bts_rtcp), |
| 87 | inet_ntoa(endp->bts), endp->in_bts, endp->bts_state.lost_no, |
| 88 | endp->in_remote, endp->net_state.lost_no, |
| 89 | VTY_NEWLINE); |
| 90 | } |
| 91 | |
| 92 | return CMD_SUCCESS; |
| 93 | } |
| 94 | |
| 95 | DEFUN(cfg_mgcp, |
| 96 | cfg_mgcp_cmd, |
| 97 | "mgcp", |
| 98 | "Configure the MGCP") |
| 99 | { |
| 100 | vty->node = MGCP_NODE; |
| 101 | return CMD_SUCCESS; |
| 102 | } |
| 103 | |
| 104 | DEFUN(cfg_mgcp_local_ip, |
| 105 | cfg_mgcp_local_ip_cmd, |
| 106 | "local ip A.B.C.D", |
| 107 | "Set the IP to be used in SDP records") |
| 108 | { |
| 109 | if (g_cfg->local_ip) |
| 110 | talloc_free(g_cfg->local_ip); |
| 111 | g_cfg->local_ip = talloc_strdup(g_cfg, argv[0]); |
| 112 | return CMD_SUCCESS; |
| 113 | } |
| 114 | |
| 115 | DEFUN(cfg_mgcp_bts_ip, |
| 116 | cfg_mgcp_bts_ip_cmd, |
| 117 | "bts ip A.B.C.D", |
| 118 | "Set the IP of the BTS for RTP forwarding") |
| 119 | { |
| 120 | if (g_cfg->bts_ip) |
| 121 | talloc_free(g_cfg->bts_ip); |
| 122 | g_cfg->bts_ip = talloc_strdup(g_cfg, argv[0]); |
| 123 | inet_aton(g_cfg->bts_ip, &g_cfg->bts_in); |
| 124 | return CMD_SUCCESS; |
| 125 | } |
| 126 | |
| 127 | DEFUN(cfg_mgcp_bind_ip, |
| 128 | cfg_mgcp_bind_ip_cmd, |
| 129 | "bind ip A.B.C.D", |
| 130 | "Bind the MGCP to this local addr") |
| 131 | { |
| 132 | if (g_cfg->source_addr) |
| 133 | talloc_free(g_cfg->source_addr); |
| 134 | g_cfg->source_addr = talloc_strdup(g_cfg, argv[0]); |
| 135 | return CMD_SUCCESS; |
| 136 | } |
| 137 | |
| 138 | DEFUN(cfg_mgcp_bind_port, |
| 139 | cfg_mgcp_bind_port_cmd, |
| 140 | "bind port <0-65534>", |
| 141 | "Bind the MGCP to this port") |
| 142 | { |
| 143 | unsigned int port = atoi(argv[0]); |
| 144 | g_cfg->source_port = port; |
| 145 | return CMD_SUCCESS; |
| 146 | } |
| 147 | |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 148 | DEFUN(cfg_mgcp_rtp_base_port, |
| 149 | cfg_mgcp_rtp_base_port_cmd, |
| 150 | "rtp base <0-65534>", |
| 151 | "Base port to use") |
| 152 | { |
| 153 | unsigned int port = atoi(argv[0]); |
| 154 | g_cfg->rtp_base_port = port; |
| 155 | return CMD_SUCCESS; |
| 156 | } |
| 157 | |
| 158 | DEFUN(cfg_mgcp_rtp_ip_dscp, |
| 159 | cfg_mgcp_rtp_ip_dscp_cmd, |
| 160 | "rtp ip-dscp <0-255>", |
| 161 | "Set the IP_TOS socket attribute on the RTP/RTCP sockets.\n" "The DSCP value.") |
| 162 | { |
| 163 | int dscp = atoi(argv[0]); |
| 164 | g_cfg->endp_dscp = dscp; |
| 165 | return CMD_SUCCESS; |
| 166 | } |
| 167 | |
| 168 | ALIAS_DEPRECATED(cfg_mgcp_rtp_ip_dscp, cfg_mgcp_rtp_ip_tos_cmd, |
| 169 | "rtp ip-tos <0-255>", |
| 170 | "Set the IP_TOS socket attribute on the RTP/RTCP sockets.\n" "The DSCP value.") |
| 171 | |
| 172 | |
| 173 | DEFUN(cfg_mgcp_sdp_payload_number, |
| 174 | cfg_mgcp_sdp_payload_number_cmd, |
| 175 | "sdp audio payload number <1-255>", |
| 176 | "Set the audio codec to use") |
| 177 | { |
| 178 | unsigned int payload = atoi(argv[0]); |
| 179 | g_cfg->audio_payload = payload; |
| 180 | return CMD_SUCCESS; |
| 181 | } |
| 182 | |
| 183 | DEFUN(cfg_mgcp_sdp_payload_name, |
| 184 | cfg_mgcp_sdp_payload_name_cmd, |
| 185 | "sdp audio payload name NAME", |
| 186 | "Set the audio name to use") |
| 187 | { |
| 188 | if (g_cfg->audio_name) |
| 189 | talloc_free(g_cfg->audio_name); |
| 190 | g_cfg->audio_name = talloc_strdup(g_cfg, argv[0]); |
| 191 | return CMD_SUCCESS; |
| 192 | } |
| 193 | |
| 194 | DEFUN(cfg_mgcp_loop, |
| 195 | cfg_mgcp_loop_cmd, |
| 196 | "loop (0|1)", |
| 197 | "Loop the audio") |
| 198 | { |
| 199 | g_cfg->audio_loop = atoi(argv[0]); |
| 200 | return CMD_SUCCESS; |
| 201 | } |
| 202 | |
| 203 | DEFUN(cfg_mgcp_number_endp, |
| 204 | cfg_mgcp_number_endp_cmd, |
| 205 | "number endpoints <0-65534>", |
| 206 | "The number of endpoints to allocate. This is not dynamic.") |
| 207 | { |
| 208 | /* + 1 as we start counting at one */ |
| 209 | g_cfg->number_endpoints = atoi(argv[0]) + 1; |
| 210 | return CMD_SUCCESS; |
| 211 | } |
| 212 | |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 213 | DEFUN(loop_endp, |
| 214 | loop_endp_cmd, |
| 215 | "loop-endpoint NAME (0|1)", |
| 216 | "Loop a given endpoint\n" |
| 217 | "The name in hex of the endpoint\n" "Disable the loop\n" "Enable the loop\n") |
| 218 | { |
| 219 | struct mgcp_endpoint *endp; |
| 220 | |
| 221 | int endp_no = strtoul(argv[0], NULL, 16); |
| 222 | if (endp_no < 1 || endp_no >= g_cfg->number_endpoints) { |
| 223 | vty_out(vty, "Loopback number %s/%d is invalid.%s", |
| 224 | argv[0], endp_no, VTY_NEWLINE); |
| 225 | return CMD_WARNING; |
| 226 | } |
| 227 | |
| 228 | |
| 229 | endp = &g_cfg->endpoints[endp_no]; |
| 230 | int loop = atoi(argv[1]); |
| 231 | |
| 232 | if (loop) |
| 233 | endp->conn_mode = MGCP_CONN_LOOPBACK; |
| 234 | else |
| 235 | endp->conn_mode = endp->orig_mode; |
| 236 | |
| 237 | return CMD_SUCCESS; |
| 238 | } |
| 239 | |
| 240 | DEFUN(ournode_exit, |
| 241 | ournode_exit_cmd, "exit", "Exit current mode and down to previous node\n") |
| 242 | { |
| 243 | switch (vty->node) { |
| 244 | case MGCP_NODE: |
| 245 | vty->node = CONFIG_NODE; |
| 246 | vty->index = NULL; |
| 247 | break; |
| 248 | } |
| 249 | |
| 250 | return CMD_SUCCESS; |
| 251 | } |
| 252 | |
| 253 | DEFUN(ournode_end, |
| 254 | ournode_end_cmd, "end", "End current mode and change to enable mode.") |
| 255 | { |
| 256 | switch (vty->node) { |
| 257 | case VIEW_NODE: |
| 258 | case ENABLE_NODE: |
| 259 | break; |
| 260 | case MGCP_NODE: |
| 261 | vty_config_unlock(vty); |
| 262 | vty->node = ENABLE_NODE; |
| 263 | vty->index = NULL; |
| 264 | vty->index_sub = NULL; |
| 265 | break; |
| 266 | } |
| 267 | |
| 268 | return CMD_SUCCESS; |
| 269 | } |
| 270 | |
| 271 | int mgcp_vty_init(void) |
| 272 | { |
| 273 | install_element_ve(&show_mgcp_cmd); |
| 274 | install_element(ENABLE_NODE, &loop_endp_cmd); |
| 275 | |
| 276 | install_element(CONFIG_NODE, &cfg_mgcp_cmd); |
| 277 | install_node(&mgcp_node, config_write_mgcp); |
| 278 | |
| 279 | install_default(MGCP_NODE); |
| 280 | install_element(MGCP_NODE, &ournode_exit_cmd); |
| 281 | install_element(MGCP_NODE, &ournode_end_cmd); |
| 282 | install_element(MGCP_NODE, &cfg_mgcp_local_ip_cmd); |
| 283 | install_element(MGCP_NODE, &cfg_mgcp_bts_ip_cmd); |
| 284 | install_element(MGCP_NODE, &cfg_mgcp_bind_ip_cmd); |
| 285 | install_element(MGCP_NODE, &cfg_mgcp_bind_port_cmd); |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 286 | install_element(MGCP_NODE, &cfg_mgcp_rtp_base_port_cmd); |
| 287 | install_element(MGCP_NODE, &cfg_mgcp_rtp_ip_dscp_cmd); |
| 288 | install_element(MGCP_NODE, &cfg_mgcp_rtp_ip_tos_cmd); |
| 289 | install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_number_cmd); |
| 290 | install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_name_cmd); |
| 291 | install_element(MGCP_NODE, &cfg_mgcp_loop_cmd); |
| 292 | install_element(MGCP_NODE, &cfg_mgcp_number_endp_cmd); |
Holger Hans Peter Freyther | fde865f | 2010-08-04 06:39:13 +0800 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg) |
| 297 | { |
| 298 | int i, rc; |
| 299 | |
| 300 | g_cfg = cfg; |
| 301 | rc = vty_read_config_file(config_file, NULL); |
| 302 | if (rc < 0) { |
| 303 | fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); |
| 304 | return rc; |
| 305 | } |
| 306 | |
| 307 | |
| 308 | if (!g_cfg->bts_ip) |
| 309 | fprintf(stderr, "No BTS ip address specified. This will allow everyone to connect.\n"); |
| 310 | |
| 311 | if (!g_cfg->source_addr) { |
| 312 | fprintf(stderr, "You need to specify a bind address.\n"); |
| 313 | return -1; |
| 314 | } |
| 315 | |
| 316 | if (mgcp_endpoints_allocate(g_cfg) != 0) { |
| 317 | fprintf(stderr, "Failed to allocate endpoints: %d. Quitting.\n", g_cfg->number_endpoints); |
| 318 | return -1; |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * This application supports two modes. |
| 323 | * 1.) a true MGCP gateway with support for AUEP, CRCX, MDCX, DLCX |
| 324 | * 2.) plain forwarding of RTP packets on the endpoints. |
| 325 | * both modes are mutual exclusive |
| 326 | */ |
| 327 | if (g_cfg->forward_ip) { |
| 328 | int port = g_cfg->rtp_base_port; |
| 329 | if (g_cfg->forward_port != 0) |
| 330 | port = g_cfg->forward_port; |
| 331 | |
| 332 | if (!g_cfg->early_bind) { |
| 333 | LOGP(DMGCP, LOGL_NOTICE, "Forwarding requires early bind.\n"); |
| 334 | return -1; |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * Store the forward IP and assign a ci. For early bind |
| 339 | * the sockets will be created after this. |
| 340 | */ |
| 341 | for (i = 1; i < g_cfg->number_endpoints; ++i) { |
| 342 | struct mgcp_endpoint *endp = &g_cfg->endpoints[i]; |
| 343 | inet_aton(g_cfg->forward_ip, &endp->remote); |
| 344 | endp->ci = CI_UNUSED + 23; |
| 345 | endp->net_rtp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port)); |
| 346 | endp->net_rtcp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port) + 1); |
| 347 | } |
| 348 | |
| 349 | LOGP(DMGCP, LOGL_NOTICE, "Configured for Audio Forwarding.\n"); |
| 350 | } |
| 351 | |
| 352 | /* early bind */ |
| 353 | if (g_cfg->early_bind) { |
| 354 | for (i = 1; i < g_cfg->number_endpoints; ++i) { |
| 355 | struct mgcp_endpoint *endp = &g_cfg->endpoints[i]; |
| 356 | int rtp_port; |
| 357 | |
| 358 | rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), g_cfg->rtp_base_port); |
| 359 | if (mgcp_bind_rtp_port(endp, rtp_port) != 0) { |
| 360 | LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port); |
| 361 | return -1; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | return !!g_cfg->forward_ip; |
| 367 | } |
| 368 | |