Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 1 | /* RTP proxy handling for ip.access nanoBTS */ |
| 2 | |
| 3 | /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <errno.h> |
| 23 | #include <unistd.h> |
| 24 | #include <sys/socket.h> |
| 25 | #include <netinet/in.h> |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 26 | #include <arpa/inet.h> |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 27 | |
| 28 | #include <openbsc/talloc.h> |
| 29 | #include <openbsc/gsm_data.h> |
| 30 | #include <openbsc/msgb.h> |
| 31 | #include <openbsc/select.h> |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 32 | #include <openbsc/debug.h> |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 33 | #include <openbsc/rtp_proxy.h> |
| 34 | |
| 35 | static LLIST_HEAD(rtp_sockets); |
| 36 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 37 | /* should we mangle the CNAME inside SDES of RTCP packets? We disable |
| 38 | * this by default, as it seems to be not needed */ |
| 39 | static int mangle_rtcp_cname = 0; |
| 40 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 41 | enum rtp_bfd_priv { |
| 42 | RTP_PRIV_NONE, |
| 43 | RTP_PRIV_RTP, |
| 44 | RTP_PRIV_RTCP |
| 45 | }; |
| 46 | |
| 47 | #define RTP_ALLOC_SIZE 1500 |
| 48 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 49 | /* according to RFC 1889 */ |
| 50 | struct rtcp_hdr { |
| 51 | u_int8_t byte0; |
| 52 | u_int8_t type; |
| 53 | u_int16_t length; |
| 54 | } __attribute__((packed)); |
| 55 | |
| 56 | #define RTCP_TYPE_SDES 202 |
| 57 | |
| 58 | #define RTCP_IE_CNAME 1 |
| 59 | |
Holger Hans Peter Freyther | 0168dc1 | 2009-07-29 06:46:26 +0200 | [diff] [blame] | 60 | /* iterate over all chunks in one RTCP message, look for CNAME IEs and |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 61 | * replace all of those with 'new_cname' */ |
| 62 | static int rtcp_sdes_cname_mangle(struct msgb *msg, struct rtcp_hdr *rh, |
| 63 | u_int16_t *rtcp_len, const char *new_cname) |
| 64 | { |
| 65 | u_int8_t *rtcp_end; |
| 66 | u_int8_t *cur = (u_int8_t *) rh; |
| 67 | u_int8_t tag, len = 0; |
| 68 | |
| 69 | rtcp_end = cur + *rtcp_len; |
| 70 | /* move cur to end of RTP header */ |
Harald Welte | 6977a29 | 2009-07-29 10:46:41 +0200 | [diff] [blame] | 71 | cur += sizeof(*rh); |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 72 | |
| 73 | /* iterate over Chunks */ |
| 74 | while (cur+4 < rtcp_end) { |
| 75 | /* skip four bytes SSRC/CSRC */ |
| 76 | cur += 4; |
| 77 | |
| 78 | /* iterate over IE's inside the chunk */ |
| 79 | while (cur+1 < rtcp_end) { |
| 80 | tag = *cur++; |
| 81 | if (tag == 0) { |
| 82 | /* end of chunk, skip additional zero */ |
| 83 | while (*cur++ == 0) { } |
| 84 | break; |
| 85 | } |
| 86 | len = *cur++; |
| 87 | |
| 88 | if (tag == RTCP_IE_CNAME) { |
| 89 | /* we've found the CNAME, lets mangle it */ |
| 90 | if (len < strlen(new_cname)) { |
| 91 | /* we need to make more space */ |
| 92 | int increase = strlen(new_cname) - len; |
| 93 | |
| 94 | msgb_push(msg, increase); |
| 95 | memmove(cur+len+increase, cur+len, |
| 96 | rtcp_end - (cur+len)); |
| 97 | /* FIXME: we have to respect RTCP |
| 98 | * padding/alignment rules! */ |
| 99 | len += increase; |
| 100 | *(cur-1) += increase; |
| 101 | rtcp_end += increase; |
| 102 | *rtcp_len += increase; |
| 103 | } |
| 104 | /* copy new CNAME into message */ |
| 105 | memcpy(cur, new_cname, strlen(new_cname)); |
| 106 | /* FIXME: zero the padding in case new CNAME |
| 107 | * is smaller than old one !!! */ |
| 108 | } |
| 109 | cur += len; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int rtcp_mangle(struct msgb *msg, struct rtp_socket *rs) |
| 117 | { |
| 118 | struct rtp_sub_socket *rss = &rs->rtcp; |
| 119 | struct rtcp_hdr *rtph; |
| 120 | u_int16_t old_len; |
| 121 | int rc; |
| 122 | |
| 123 | if (!mangle_rtcp_cname) |
| 124 | return 0; |
| 125 | |
| 126 | /* iterate over list of RTCP messages */ |
| 127 | rtph = (struct rtcp_hdr *)msg->data; |
| 128 | while ((void *)rtph + sizeof(*rtph) < (void *)msg->data + msg->len) { |
| 129 | old_len = (ntohs(rtph->length) + 1) * 4; |
| 130 | if (rtph->type == RTCP_TYPE_SDES) { |
| 131 | char new_cname[255]; |
| 132 | strncpy(new_cname, inet_ntoa(rss->sin_local.sin_addr), |
| 133 | sizeof(new_cname)); |
| 134 | new_cname[sizeof(new_cname)-1] = '\0'; |
| 135 | rc = rtcp_sdes_cname_mangle(msg, rtph, &old_len, |
| 136 | new_cname); |
| 137 | if (rc < 0) |
| 138 | return rc; |
| 139 | } |
| 140 | rtph = (void *)rtph + old_len; |
| 141 | } |
| 142 | |
| 143 | return 0; |
| 144 | } |
| 145 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 146 | /* read from incoming RTP/RTCP socket */ |
| 147 | static int rtp_socket_read(struct rtp_socket *rs, struct rtp_sub_socket *rss) |
| 148 | { |
| 149 | int rc; |
| 150 | struct msgb *msg = msgb_alloc(RTP_ALLOC_SIZE, "RTP/RTCP"); |
| 151 | struct rtp_sub_socket *other_rss; |
| 152 | |
| 153 | if (!msg) |
| 154 | return -ENOMEM; |
| 155 | |
| 156 | rc = read(rss->bfd.fd, msg->data, RTP_ALLOC_SIZE); |
| 157 | if (rc <= 0) { |
| 158 | rss->bfd.when &= ~BSC_FD_READ; |
| 159 | return rc; |
| 160 | } |
| 161 | |
| 162 | msgb_put(msg, rc); |
| 163 | |
| 164 | switch (rs->rx_action) { |
| 165 | case RTP_PROXY: |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 166 | if (!rs->proxy.other_sock) { |
| 167 | rc = -EIO; |
| 168 | goto out_free; |
| 169 | } |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 170 | if (rss->bfd.priv_nr == RTP_PRIV_RTP) |
| 171 | other_rss = &rs->proxy.other_sock->rtp; |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 172 | else if (rss->bfd.priv_nr == RTP_PRIV_RTCP) { |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 173 | other_rss = &rs->proxy.other_sock->rtcp; |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 174 | /* modify RTCP SDES CNAME */ |
| 175 | rc = rtcp_mangle(msg, rs); |
| 176 | if (rc < 0) |
| 177 | goto out_free; |
| 178 | } else { |
| 179 | rc = -EINVAL; |
| 180 | goto out_free; |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 181 | } |
| 182 | msgb_enqueue(&other_rss->tx_queue, msg); |
| 183 | other_rss->bfd.when |= BSC_FD_WRITE; |
| 184 | break; |
| 185 | /* FIXME: other cases */ |
| 186 | } |
| 187 | |
| 188 | return rc; |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 189 | |
| 190 | out_free: |
| 191 | msgb_free(msg); |
| 192 | return rc; |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /* write from tx_queue to RTP/RTCP socket */ |
| 196 | static int rtp_socket_write(struct rtp_socket *rs, struct rtp_sub_socket *rss) |
| 197 | { |
| 198 | struct msgb *msg; |
| 199 | int written; |
| 200 | |
| 201 | msg = msgb_dequeue(&rss->tx_queue); |
| 202 | if (!msg) { |
| 203 | rss->bfd.when &= ~BSC_FD_WRITE; |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | written = write(rss->bfd.fd, msg->data, msg->len); |
| 208 | if (written < msg->len) { |
| 209 | perror("short write"); |
| 210 | msgb_free(msg); |
| 211 | return -EIO; |
| 212 | } |
| 213 | |
| 214 | msgb_free(msg); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* callback for the select.c:bfd_* layer */ |
| 221 | static int rtp_bfd_cb(struct bsc_fd *bfd, unsigned int flags) |
| 222 | { |
| 223 | struct rtp_socket *rs = bfd->data; |
| 224 | struct rtp_sub_socket *rss; |
| 225 | |
| 226 | switch (bfd->priv_nr) { |
| 227 | case RTP_PRIV_RTP: |
| 228 | rss = &rs->rtp; |
| 229 | break; |
| 230 | case RTP_PRIV_RTCP: |
| 231 | rss = &rs->rtcp; |
| 232 | break; |
| 233 | default: |
| 234 | return -EINVAL; |
| 235 | } |
| 236 | |
| 237 | if (flags & BSC_FD_READ) |
| 238 | rtp_socket_read(rs, rss); |
| 239 | |
| 240 | if (flags & BSC_FD_WRITE) |
| 241 | rtp_socket_write(rs, rss); |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static void init_rss(struct rtp_sub_socket *rss, |
| 247 | struct rtp_socket *rs, int fd, int priv_nr) |
| 248 | { |
| 249 | /* initialize bfd */ |
| 250 | rss->bfd.fd = fd; |
| 251 | rss->bfd.data = rs; |
| 252 | rss->bfd.priv_nr = priv_nr; |
| 253 | rss->bfd.cb = rtp_bfd_cb; |
| 254 | } |
| 255 | |
| 256 | struct rtp_socket *rtp_socket_create(void) |
| 257 | { |
| 258 | int rc; |
| 259 | struct rtp_socket *rs; |
| 260 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 261 | DEBUGP(DMUX, "rtp_socket_create(): "); |
| 262 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 263 | rs = talloc_zero(tall_bsc_ctx, struct rtp_socket); |
| 264 | if (!rs) |
| 265 | return NULL; |
| 266 | |
| 267 | INIT_LLIST_HEAD(&rs->rtp.tx_queue); |
| 268 | INIT_LLIST_HEAD(&rs->rtcp.tx_queue); |
| 269 | |
| 270 | rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
| 271 | if (rc < 0) |
| 272 | goto out_free; |
| 273 | |
| 274 | init_rss(&rs->rtp, rs, rc, RTP_PRIV_RTP); |
| 275 | rc = bsc_register_fd(&rs->rtp.bfd); |
| 276 | if (rc < 0) |
| 277 | goto out_rtp_socket; |
| 278 | |
| 279 | rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
| 280 | if (rc < 0) |
| 281 | goto out_rtp_bfd; |
| 282 | |
| 283 | init_rss(&rs->rtcp, rs, rc, RTP_PRIV_RTCP); |
| 284 | rc = bsc_register_fd(&rs->rtcp.bfd); |
| 285 | if (rc < 0) |
| 286 | goto out_rtcp_socket; |
| 287 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 288 | DEBUGPC(DMUX, "success\n"); |
| 289 | |
| 290 | rc = rtp_socket_bind(rs, INADDR_ANY); |
| 291 | if (rc < 0) |
| 292 | goto out_rtcp_bfd; |
| 293 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 294 | return rs; |
| 295 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 296 | out_rtcp_bfd: |
| 297 | bsc_unregister_fd(&rs->rtcp.bfd); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 298 | out_rtcp_socket: |
| 299 | close(rs->rtcp.bfd.fd); |
| 300 | out_rtp_bfd: |
| 301 | bsc_unregister_fd(&rs->rtp.bfd); |
| 302 | out_rtp_socket: |
| 303 | close(rs->rtp.bfd.fd); |
| 304 | out_free: |
| 305 | talloc_free(rs); |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 306 | DEBUGPC(DMUX, "failed\n"); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 307 | return NULL; |
| 308 | } |
| 309 | |
| 310 | static int rtp_sub_socket_bind(struct rtp_sub_socket *rss, u_int32_t ip, |
| 311 | u_int16_t port) |
| 312 | { |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 313 | int rc; |
| 314 | socklen_t alen = sizeof(rss->sin_local); |
| 315 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 316 | rss->sin_local.sin_family = AF_INET; |
| 317 | rss->sin_local.sin_addr.s_addr = htonl(ip); |
| 318 | rss->sin_local.sin_port = htons(port); |
| 319 | rss->bfd.when |= BSC_FD_READ; |
| 320 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 321 | rc = bind(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, |
| 322 | sizeof(rss->sin_local)); |
| 323 | if (rc < 0) |
| 324 | return rc; |
| 325 | |
| 326 | /* retrieve the address we actually bound to, in case we |
| 327 | * passed INADDR_ANY as IP address */ |
| 328 | return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, |
| 329 | &alen); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | #define RTP_PORT_BASE 30000 |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 333 | static unsigned int next_udp_port = RTP_PORT_BASE; |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 334 | |
| 335 | /* bind a RTP socket to a local address */ |
| 336 | int rtp_socket_bind(struct rtp_socket *rs, u_int32_t ip) |
| 337 | { |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 338 | int rc = -EIO; |
| 339 | struct in_addr ia; |
| 340 | |
| 341 | ia.s_addr = htonl(ip); |
| 342 | DEBUGP(DMUX, "rtp_socket_bind(rs=%p, IP=%s): ", rs, |
| 343 | inet_ntoa(ia)); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 344 | |
| 345 | /* try to bind to a consecutive pair of ports */ |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 346 | for (next_udp_port = next_udp_port % 0xffff; |
| 347 | next_udp_port < 0xffff; next_udp_port += 2) { |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 348 | rc = rtp_sub_socket_bind(&rs->rtp, ip, next_udp_port); |
| 349 | if (rc != 0) |
| 350 | continue; |
| 351 | |
| 352 | rc = rtp_sub_socket_bind(&rs->rtcp, ip, next_udp_port+1); |
| 353 | if (rc == 0) |
| 354 | break; |
| 355 | } |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 356 | if (rc < 0) { |
| 357 | DEBUGPC(DMUX, "failed\n"); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 358 | return rc; |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 359 | } |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 360 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 361 | ia.s_addr = rs->rtp.sin_local.sin_addr.s_addr; |
| 362 | DEBUGPC(DMUX, "BOUND_IP=%s, BOUND_PORT=%u\n", |
| 363 | inet_ntoa(ia), ntohs(rs->rtp.sin_local.sin_port)); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 364 | return ntohs(rs->rtp.sin_local.sin_port); |
| 365 | } |
| 366 | |
| 367 | static int rtp_sub_socket_connect(struct rtp_sub_socket *rss, |
| 368 | u_int32_t ip, u_int16_t port) |
| 369 | { |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 370 | int rc; |
| 371 | socklen_t alen = sizeof(rss->sin_local); |
| 372 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 373 | rss->sin_remote.sin_family = AF_INET; |
| 374 | rss->sin_remote.sin_addr.s_addr = htonl(ip); |
| 375 | rss->sin_remote.sin_port = htons(port); |
| 376 | |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 377 | rc = connect(rss->bfd.fd, (struct sockaddr *) &rss->sin_remote, |
| 378 | sizeof(rss->sin_remote)); |
| 379 | if (rc < 0) |
| 380 | return rc; |
| 381 | |
| 382 | return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, |
| 383 | &alen); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | /* 'connect' a RTP socket to a remote peer */ |
| 387 | int rtp_socket_connect(struct rtp_socket *rs, u_int32_t ip, u_int16_t port) |
| 388 | { |
| 389 | int rc; |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 390 | struct in_addr ia; |
| 391 | |
| 392 | ia.s_addr = htonl(ip); |
| 393 | DEBUGP(DMUX, "rtp_socket_connect(rs=%p, ip=%s, port=%u)\n", |
| 394 | rs, inet_ntoa(ia), port); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 395 | |
| 396 | rc = rtp_sub_socket_connect(&rs->rtp, ip, port); |
| 397 | if (rc < 0) |
| 398 | return rc; |
| 399 | |
| 400 | return rtp_sub_socket_connect(&rs->rtcp, ip, port+1); |
| 401 | } |
| 402 | |
| 403 | /* bind two RTP/RTCP sockets together */ |
| 404 | int rtp_socket_proxy(struct rtp_socket *this, struct rtp_socket *other) |
| 405 | { |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 406 | DEBUGP(DMUX, "rtp_socket_proxy(this=%p, other=%p)\n", |
| 407 | this, other); |
| 408 | |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 409 | this->rx_action = RTP_PROXY; |
| 410 | this->proxy.other_sock = other; |
| 411 | |
| 412 | other->rx_action = RTP_PROXY; |
| 413 | other->proxy.other_sock = this; |
| 414 | |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | static void free_tx_queue(struct rtp_sub_socket *rss) |
| 419 | { |
| 420 | struct msgb *msg; |
| 421 | |
| 422 | while ((msg = msgb_dequeue(&rss->tx_queue))) |
| 423 | msgb_free(msg); |
| 424 | } |
| 425 | |
| 426 | int rtp_socket_free(struct rtp_socket *rs) |
| 427 | { |
Harald Welte | 3c06207 | 2009-07-28 18:25:29 +0200 | [diff] [blame] | 428 | DEBUGP(DMUX, "rtp_socket_free(rs=%p)\n", rs); |
Harald Welte | 0b0bbce | 2009-07-28 00:01:58 +0200 | [diff] [blame] | 429 | |
| 430 | /* make sure we don't leave references dangling to us */ |
| 431 | if (rs->rx_action == RTP_PROXY && |
| 432 | rs->proxy.other_sock) |
| 433 | rs->proxy.other_sock->proxy.other_sock = NULL; |
| 434 | |
| 435 | bsc_unregister_fd(&rs->rtp.bfd); |
| 436 | close(rs->rtp.bfd.fd); |
| 437 | free_tx_queue(&rs->rtp); |
| 438 | |
| 439 | bsc_unregister_fd(&rs->rtcp.bfd); |
| 440 | close(rs->rtcp.bfd.fd); |
| 441 | free_tx_queue(&rs->rtcp); |
| 442 | |
| 443 | talloc_free(rs); |
| 444 | |
| 445 | return 0; |
| 446 | } |