Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 5 | * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2011 by On-Waves |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 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 |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <string.h> |
Holger Hans Peter Freyther | b715d7f | 2010-05-14 02:14:09 +0800 | [diff] [blame] | 25 | #include <stdlib.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 26 | #include <unistd.h> |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 27 | #include <errno.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 28 | |
| 29 | #include <sys/socket.h> |
| 30 | #include <arpa/inet.h> |
| 31 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 1ebad74 | 2010-02-26 20:16:37 +0100 | [diff] [blame] | 34 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 35 | #include <openbsc/mgcp.h> |
| 36 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 37 | |
| 38 | #warning "Make use of the rtp proxy code" |
| 39 | |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 40 | /* attempt to determine byte order */ |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 41 | #include <sys/param.h> |
| 42 | #include <limits.h> |
| 43 | |
| 44 | #ifndef __BYTE_ORDER |
Tobias Engel | aff2071 | 2012-10-24 17:53:50 +0200 | [diff] [blame] | 45 | # ifdef __APPLE__ |
| 46 | # define __BYTE_ORDER __DARWIN_BYTE_ORDER |
| 47 | # define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN |
| 48 | # define __BIG_ENDIAN __DARWIN_BIG_ENDIAN |
| 49 | # else |
| 50 | # error "__BYTE_ORDER should be defined by someone" |
| 51 | # endif |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 52 | #endif |
| 53 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 54 | /* according to rtp_proxy.c RFC 3550 */ |
| 55 | struct rtp_hdr { |
| 56 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 57 | uint8_t csrc_count:4, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 58 | extension:1, |
| 59 | padding:1, |
| 60 | version:2; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 61 | uint8_t payload_type:7, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 62 | marker:1; |
| 63 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 64 | uint8_t version:2, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 65 | padding:1, |
| 66 | extension:1, |
| 67 | csrc_count:4; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 68 | uint8_t marker:1, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 69 | payload_type:7; |
| 70 | #endif |
Holger Hans Peter Freyther | d340cd3 | 2010-07-23 18:56:01 +0800 | [diff] [blame] | 71 | uint16_t sequence; |
Holger Hans Peter Freyther | d9b18f8 | 2010-07-23 18:55:38 +0800 | [diff] [blame] | 72 | uint32_t timestamp; |
| 73 | uint32_t ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 74 | } __attribute__((packed)); |
| 75 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame^] | 76 | #define RTP_SEQ_MOD (1 << 16) |
| 77 | #define RTP_MAX_DROPOUT 3000 |
| 78 | #define RTP_MAX_MISORDER 100 |
| 79 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 80 | |
| 81 | enum { |
| 82 | DEST_NETWORK = 0, |
| 83 | DEST_BTS = 1, |
| 84 | }; |
| 85 | |
| 86 | enum { |
| 87 | PROTO_RTP, |
| 88 | PROTO_RTCP, |
| 89 | }; |
| 90 | |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 91 | #define DUMMY_LOAD 0x23 |
| 92 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 93 | |
| 94 | static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len) |
| 95 | { |
| 96 | struct sockaddr_in out; |
| 97 | out.sin_family = AF_INET; |
| 98 | out.sin_port = port; |
| 99 | memcpy(&out.sin_addr, addr, sizeof(*addr)); |
| 100 | |
| 101 | return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out)); |
| 102 | } |
| 103 | |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 104 | int mgcp_send_dummy(struct mgcp_endpoint *endp) |
| 105 | { |
| 106 | static char buf[] = { DUMMY_LOAD }; |
| 107 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 108 | return udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 109 | endp->net_end.rtp_port, buf, 1); |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 110 | } |
| 111 | |
Holger Hans Peter Freyther | 1e85af6 | 2012-10-22 17:15:31 +0200 | [diff] [blame] | 112 | /** |
| 113 | * The RFC 3550 Appendix A assumes there are multiple sources but |
| 114 | * some of the supported endpoints (e.g. the nanoBTS) can only handle |
| 115 | * one source and this code will patch packages to appear as if there |
| 116 | * is only one source. |
| 117 | * There is also no probation period for new sources. Every package |
| 118 | * we receive will be seen as a switch in streams. |
| 119 | */ |
Holger Hans Peter Freyther | c02f11a | 2010-08-04 22:20:34 +0800 | [diff] [blame] | 120 | static void patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state, |
| 121 | int payload, struct sockaddr_in *addr, char *data, int len) |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 122 | { |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame^] | 123 | uint16_t seq, udelta; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 124 | uint32_t timestamp; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 125 | struct rtp_hdr *rtp_hdr; |
| 126 | |
| 127 | if (len < sizeof(*rtp_hdr)) |
| 128 | return; |
| 129 | |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 130 | rtp_hdr = (struct rtp_hdr *) data; |
| 131 | seq = ntohs(rtp_hdr->sequence); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 132 | timestamp = ntohl(rtp_hdr->timestamp); |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 133 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 134 | if (!state->initialized) { |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 135 | state->base_seq = seq; |
| 136 | state->max_seq = seq - 1; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 137 | state->ssrc = state->orig_ssrc = rtp_hdr->ssrc; |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 138 | state->initialized = 1; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 139 | state->last_timestamp = timestamp; |
| 140 | } else if (state->ssrc != rtp_hdr->ssrc) { |
| 141 | state->ssrc = rtp_hdr->ssrc; |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 142 | state->seq_offset = (state->max_seq + 1) - seq; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 143 | state->timestamp_offset = state->last_timestamp - timestamp; |
Holger Hans Peter Freyther | 6357a8e | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 144 | state->patch = endp->allow_patch; |
Holger Hans Peter Freyther | 2f10458 | 2010-08-04 21:45:39 +0800 | [diff] [blame] | 145 | LOGP(DMGCP, LOGL_NOTICE, |
Holger Hans Peter Freyther | f1f6bba | 2010-08-04 22:14:46 +0800 | [diff] [blame] | 146 | "The SSRC changed on 0x%x SSRC: %u offset: %d from %s:%d in %d\n", |
Holger Hans Peter Freyther | c02f11a | 2010-08-04 22:20:34 +0800 | [diff] [blame] | 147 | ENDPOINT_NUMBER(endp), state->ssrc, state->seq_offset, |
| 148 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), endp->conn_mode); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 149 | } |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 150 | |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 151 | /* apply the offset and store it back to the packet */ |
Holger Hans Peter Freyther | 5c1e6cf | 2010-08-03 15:36:57 +0000 | [diff] [blame] | 152 | if (state->patch) { |
| 153 | seq += state->seq_offset; |
| 154 | rtp_hdr->sequence = htons(seq); |
| 155 | rtp_hdr->ssrc = state->orig_ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 156 | |
Holger Hans Peter Freyther | 5c1e6cf | 2010-08-03 15:36:57 +0000 | [diff] [blame] | 157 | timestamp += state->timestamp_offset; |
| 158 | rtp_hdr->timestamp = htonl(timestamp); |
| 159 | } |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 160 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame^] | 161 | /* |
| 162 | * The below takes the shape of the validation from Appendix A. Check |
| 163 | * if there is something weird with the sequence number, otherwise check |
| 164 | * for a wrap around in the sequence number. |
| 165 | */ |
| 166 | udelta = seq - state->max_seq; |
| 167 | if (udelta < RTP_MAX_DROPOUT) { |
| 168 | if (seq < state->max_seq) |
| 169 | state->cycles += RTP_SEQ_MOD; |
| 170 | } else if (udelta <= RTP_SEQ_MOD + RTP_MAX_MISORDER) { |
| 171 | LOGP(DMGCP, LOGL_NOTICE, |
| 172 | "RTP seqno made a very large jump on 0x%x delta: %u\n", |
| 173 | ENDPOINT_NUMBER(endp), udelta); |
| 174 | } |
| 175 | |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 176 | state->max_seq = seq; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 177 | state->last_timestamp = timestamp; |
| 178 | |
Holger Hans Peter Freyther | 7279d24 | 2010-04-06 11:15:50 +0200 | [diff] [blame] | 179 | if (payload < 0) |
| 180 | return; |
| 181 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 182 | rtp_hdr->payload_type = payload; |
| 183 | } |
| 184 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 185 | /* |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 186 | * The below code is for dispatching. We have a dedicated port for |
| 187 | * the data coming from the net and one to discover the BTS. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 188 | */ |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 189 | static int forward_data(int fd, struct mgcp_rtp_tap *tap, const char *buf, int len) |
| 190 | { |
| 191 | if (!tap->enabled) |
| 192 | return 0; |
| 193 | |
| 194 | return sendto(fd, buf, len, 0, |
| 195 | (struct sockaddr *)&tap->forward, sizeof(tap->forward)); |
| 196 | } |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 197 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 198 | static int send_transcoder(struct mgcp_rtp_end *end, struct mgcp_config *cfg, |
| 199 | int is_rtp, const char *buf, int len) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 200 | { |
| 201 | int rc; |
| 202 | int port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 203 | struct sockaddr_in addr; |
| 204 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 205 | port = is_rtp ? end->rtp_port : end->rtcp_port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 206 | |
| 207 | addr.sin_family = AF_INET; |
| 208 | addr.sin_addr = cfg->transcoder_in; |
Holger Hans Peter Freyther | 5f2cd84 | 2010-11-01 21:53:39 +0100 | [diff] [blame] | 209 | addr.sin_port = port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 210 | |
| 211 | rc = sendto(is_rtp ? |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 212 | end->rtp.fd : |
| 213 | end->rtcp.fd, buf, len, 0, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 214 | (struct sockaddr *) &addr, sizeof(addr)); |
| 215 | |
| 216 | if (rc != len) |
| 217 | LOGP(DMGCP, LOGL_ERROR, |
| 218 | "Failed to send data to the transcoder: %s\n", |
| 219 | strerror(errno)); |
| 220 | |
| 221 | return rc; |
| 222 | } |
| 223 | |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 224 | static int send_to(struct mgcp_endpoint *endp, int dest, int is_rtp, |
| 225 | struct sockaddr_in *addr, char *buf, int rc) |
| 226 | { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 227 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 228 | /* For loop toggle the destination and then dispatch. */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 229 | if (tcfg->audio_loop) |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 230 | dest = !dest; |
| 231 | |
| 232 | /* Loop based on the conn_mode, maybe undoing the above */ |
| 233 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 234 | dest = !dest; |
| 235 | |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 236 | if (dest == DEST_NETWORK) { |
| 237 | if (is_rtp) { |
| 238 | patch_and_count(endp, &endp->bts_state, |
| 239 | endp->net_end.payload_type, |
| 240 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 241 | forward_data(endp->net_end.rtp.fd, |
| 242 | &endp->taps[MGCP_TAP_NET_OUT], buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 243 | return udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, |
| 244 | endp->net_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 245 | } else if (!tcfg->omit_rtcp) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 246 | return udp_send(endp->net_end.rtcp.fd, &endp->net_end.addr, |
| 247 | endp->net_end.rtcp_port, buf, rc); |
| 248 | } |
| 249 | } else { |
| 250 | if (is_rtp) { |
| 251 | patch_and_count(endp, &endp->net_state, |
| 252 | endp->bts_end.payload_type, |
| 253 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 254 | forward_data(endp->bts_end.rtp.fd, |
| 255 | &endp->taps[MGCP_TAP_BTS_OUT], buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 256 | return udp_send(endp->bts_end.rtp.fd, &endp->bts_end.addr, |
| 257 | endp->bts_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 258 | } else if (!tcfg->omit_rtcp) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 259 | return udp_send(endp->bts_end.rtcp.fd, &endp->bts_end.addr, |
| 260 | endp->bts_end.rtcp_port, buf, rc); |
| 261 | } |
| 262 | } |
Holger Hans Peter Freyther | 8c3d069 | 2012-09-11 12:31:25 +0200 | [diff] [blame] | 263 | |
| 264 | return 0; |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 265 | } |
| 266 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 267 | static int receive_from(struct mgcp_endpoint *endp, int fd, struct sockaddr_in *addr, |
| 268 | char *buf, int bufsize) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 269 | { |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 270 | int rc; |
| 271 | socklen_t slen = sizeof(*addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 272 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 273 | rc = recvfrom(fd, buf, bufsize, 0, |
| 274 | (struct sockaddr *) addr, &slen); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 275 | if (rc < 0) { |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 276 | LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x errno: %d/%s\n", |
| 277 | ENDPOINT_NUMBER(endp), errno, strerror(errno)); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 278 | return -1; |
| 279 | } |
| 280 | |
| 281 | /* do not forward aynthing... maybe there is a packet from the bts */ |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 282 | if (!endp->allocated) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 283 | return -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 284 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 285 | #warning "Slight spec violation. With connection mode recvonly we should attempt to forward." |
| 286 | |
| 287 | return rc; |
| 288 | } |
| 289 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 290 | static int rtp_data_net(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 291 | { |
| 292 | char buf[4096]; |
| 293 | struct sockaddr_in addr; |
| 294 | struct mgcp_endpoint *endp; |
| 295 | int rc, proto; |
| 296 | |
| 297 | endp = (struct mgcp_endpoint *) fd->data; |
| 298 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 299 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 300 | if (rc <= 0) |
| 301 | return -1; |
| 302 | |
| 303 | if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) { |
| 304 | LOGP(DMGCP, LOGL_ERROR, |
| 305 | "Data from wrong address %s on 0x%x\n", |
| 306 | inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); |
| 307 | return -1; |
| 308 | } |
| 309 | |
| 310 | if (endp->net_end.rtp_port != addr.sin_port && |
| 311 | endp->net_end.rtcp_port != addr.sin_port) { |
| 312 | LOGP(DMGCP, LOGL_ERROR, |
| 313 | "Data from wrong source port %d on 0x%x\n", |
| 314 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 315 | return -1; |
| 316 | } |
| 317 | |
| 318 | /* throw away the dummy message */ |
| 319 | if (rc == 1 && buf[0] == DUMMY_LOAD) { |
| 320 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from network on 0x%x\n", |
| 321 | ENDPOINT_NUMBER(endp)); |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | proto = fd == &endp->net_end.rtp ? PROTO_RTP : PROTO_RTCP; |
| 326 | endp->net_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 327 | endp->net_end.octets += rc; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 328 | |
| 329 | forward_data(fd->fd, &endp->taps[MGCP_TAP_NET_IN], buf, rc); |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 330 | if (endp->is_transcoded) |
| 331 | return send_transcoder(&endp->trans_net, endp->cfg, proto == PROTO_RTP, &buf[0], rc); |
| 332 | else |
| 333 | return send_to(endp, DEST_BTS, proto == PROTO_RTP, &addr, &buf[0], rc); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 334 | } |
| 335 | |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 336 | static void discover_bts(struct mgcp_endpoint *endp, int proto, struct sockaddr_in *addr) |
| 337 | { |
| 338 | struct mgcp_config *cfg = endp->cfg; |
| 339 | |
| 340 | if (proto == PROTO_RTP && endp->bts_end.rtp_port == 0) { |
| 341 | if (!cfg->bts_ip || |
| 342 | memcmp(&addr->sin_addr, |
| 343 | &cfg->bts_in, sizeof(cfg->bts_in)) == 0 || |
| 344 | memcmp(&addr->sin_addr, |
| 345 | &endp->bts_end.addr, sizeof(endp->bts_end.addr)) == 0) { |
| 346 | |
| 347 | endp->bts_end.rtp_port = addr->sin_port; |
| 348 | endp->bts_end.addr = addr->sin_addr; |
| 349 | |
| 350 | LOGP(DMGCP, LOGL_NOTICE, |
| 351 | "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n", |
| 352 | ENDPOINT_NUMBER(endp), ntohs(endp->bts_end.rtp_port), |
| 353 | ntohs(endp->bts_end.rtcp_port), inet_ntoa(addr->sin_addr)); |
| 354 | } |
| 355 | } else if (proto == PROTO_RTCP && endp->bts_end.rtcp_port == 0) { |
| 356 | if (memcmp(&endp->bts_end.addr, &addr->sin_addr, |
| 357 | sizeof(endp->bts_end.addr)) == 0) { |
| 358 | endp->bts_end.rtcp_port = addr->sin_port; |
| 359 | } |
| 360 | } |
| 361 | } |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 362 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 363 | static int rtp_data_bts(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 364 | { |
| 365 | char buf[4096]; |
| 366 | struct sockaddr_in addr; |
| 367 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 368 | int rc, proto; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 369 | |
| 370 | endp = (struct mgcp_endpoint *) fd->data; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 371 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 372 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 373 | if (rc <= 0) |
| 374 | return -1; |
| 375 | |
Holger Hans Peter Freyther | 0d44eb6 | 2010-08-06 07:39:26 +0800 | [diff] [blame] | 376 | proto = fd == &endp->bts_end.rtp ? PROTO_RTP : PROTO_RTCP; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 377 | |
| 378 | /* We have no idea who called us, maybe it is the BTS. */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 379 | /* it was the BTS... */ |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 380 | discover_bts(endp, proto, &addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 381 | |
Holger Hans Peter Freyther | ea97fbf | 2010-08-05 10:53:26 +0000 | [diff] [blame] | 382 | if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) { |
| 383 | LOGP(DMGCP, LOGL_ERROR, |
| 384 | "Data from wrong bts %s on 0x%x\n", |
| 385 | inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); |
| 386 | return -1; |
| 387 | } |
| 388 | |
| 389 | if (endp->bts_end.rtp_port != addr.sin_port && |
| 390 | endp->bts_end.rtcp_port != addr.sin_port) { |
| 391 | LOGP(DMGCP, LOGL_ERROR, |
| 392 | "Data from wrong bts source port %d on 0x%x\n", |
| 393 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 394 | return -1; |
| 395 | } |
| 396 | |
Holger Hans Peter Freyther | b3c206a | 2010-05-14 02:18:59 +0800 | [diff] [blame] | 397 | /* throw away the dummy message */ |
Holger Hans Peter Freyther | aa9d3ce | 2010-04-22 12:14:51 +0800 | [diff] [blame] | 398 | if (rc == 1 && buf[0] == DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 399 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from bts on 0x%x\n", |
Holger Hans Peter Freyther | aa9d3ce | 2010-04-22 12:14:51 +0800 | [diff] [blame] | 400 | ENDPOINT_NUMBER(endp)); |
| 401 | return 0; |
| 402 | } |
| 403 | |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 404 | /* do this before the loop handling */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 405 | endp->bts_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 406 | endp->bts_end.octets += rc; |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 407 | |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 408 | forward_data(fd->fd, &endp->taps[MGCP_TAP_BTS_IN], buf, rc); |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 409 | if (endp->is_transcoded) |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 410 | return send_transcoder(&endp->trans_bts, endp->cfg, proto == PROTO_RTP, &buf[0], rc); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 411 | else |
| 412 | return send_to(endp, DEST_NETWORK, proto == PROTO_RTP, &addr, &buf[0], rc); |
| 413 | } |
| 414 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 415 | static int rtp_data_transcoder(struct mgcp_rtp_end *end, struct mgcp_endpoint *_endp, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 416 | int dest, struct osmo_fd *fd) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 417 | { |
| 418 | char buf[4096]; |
| 419 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 420 | struct mgcp_config *cfg; |
| 421 | int rc, proto; |
| 422 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 423 | cfg = _endp->cfg; |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 424 | rc = receive_from(_endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 425 | if (rc <= 0) |
| 426 | return -1; |
| 427 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 428 | proto = fd == &end->rtp ? PROTO_RTP : PROTO_RTCP; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 429 | |
| 430 | if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) { |
| 431 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 432 | "Data not coming from transcoder dest: %d %s on 0x%x\n", |
| 433 | dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 434 | return -1; |
| 435 | } |
| 436 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 437 | if (end->rtp_port != addr.sin_port && |
| 438 | end->rtcp_port != addr.sin_port) { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 439 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 440 | "Data from wrong transcoder dest %d source port %d on 0x%x\n", |
| 441 | dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 442 | return -1; |
| 443 | } |
| 444 | |
| 445 | /* throw away the dummy message */ |
| 446 | if (rc == 1 && buf[0] == DUMMY_LOAD) { |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 447 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n", |
| 448 | dest, ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 449 | return 0; |
| 450 | } |
| 451 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 452 | end->packets += 1; |
| 453 | return send_to(_endp, dest, proto == PROTO_RTP, &addr, &buf[0], rc); |
| 454 | } |
| 455 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 456 | static int rtp_data_trans_net(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 457 | { |
| 458 | struct mgcp_endpoint *endp; |
| 459 | endp = (struct mgcp_endpoint *) fd->data; |
| 460 | |
| 461 | return rtp_data_transcoder(&endp->trans_net, endp, DEST_NETWORK, fd); |
| 462 | } |
| 463 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 464 | static int rtp_data_trans_bts(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 465 | { |
| 466 | struct mgcp_endpoint *endp; |
| 467 | endp = (struct mgcp_endpoint *) fd->data; |
| 468 | |
| 469 | return rtp_data_transcoder(&endp->trans_bts, endp, DEST_BTS, fd); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 470 | } |
| 471 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 472 | static int create_bind(const char *source_addr, struct osmo_fd *fd, int port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 473 | { |
| 474 | struct sockaddr_in addr; |
| 475 | int on = 1; |
| 476 | |
| 477 | fd->fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 478 | if (fd->fd < 0) { |
| 479 | LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n"); |
| 480 | return -1; |
| 481 | } |
| 482 | |
| 483 | setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 484 | memset(&addr, 0, sizeof(addr)); |
| 485 | addr.sin_family = AF_INET; |
| 486 | addr.sin_port = htons(port); |
| 487 | inet_aton(source_addr, &addr.sin_addr); |
| 488 | |
| 489 | if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 6f36e92 | 2010-08-06 03:00:17 +0800 | [diff] [blame] | 490 | close(fd->fd); |
| 491 | fd->fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 492 | return -1; |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 498 | static int set_ip_tos(int fd, int tos) |
| 499 | { |
| 500 | int ret; |
| 501 | ret = setsockopt(fd, IPPROTO_IP, IP_TOS, |
| 502 | &tos, sizeof(tos)); |
| 503 | return ret != 0; |
| 504 | } |
| 505 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 506 | static int bind_rtp(struct mgcp_config *cfg, struct mgcp_rtp_end *rtp_end, int endpno) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 507 | { |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 508 | if (create_bind(cfg->source_addr, &rtp_end->rtp, rtp_end->local_port) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 509 | LOGP(DMGCP, LOGL_ERROR, "Failed to create RTP port: %s:%d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 510 | cfg->source_addr, rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 511 | goto cleanup0; |
| 512 | } |
| 513 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 514 | if (create_bind(cfg->source_addr, &rtp_end->rtcp, rtp_end->local_port + 1) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 515 | LOGP(DMGCP, LOGL_ERROR, "Failed to create RTCP port: %s:%d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 516 | cfg->source_addr, rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 517 | goto cleanup1; |
| 518 | } |
| 519 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 520 | set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp); |
| 521 | set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp); |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 522 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 523 | rtp_end->rtp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 524 | if (osmo_fd_register(&rtp_end->rtp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 525 | LOGP(DMGCP, LOGL_ERROR, "Failed to register RTP port %d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 526 | rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 527 | goto cleanup2; |
| 528 | } |
| 529 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 530 | rtp_end->rtcp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 531 | if (osmo_fd_register(&rtp_end->rtcp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 532 | LOGP(DMGCP, LOGL_ERROR, "Failed to register RTCP port %d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 533 | rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 534 | goto cleanup3; |
| 535 | } |
| 536 | |
| 537 | return 0; |
| 538 | |
| 539 | cleanup3: |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 540 | osmo_fd_unregister(&rtp_end->rtp); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 541 | cleanup2: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 542 | close(rtp_end->rtcp.fd); |
| 543 | rtp_end->rtcp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 544 | cleanup1: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 545 | close(rtp_end->rtp.fd); |
| 546 | rtp_end->rtp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 547 | cleanup0: |
| 548 | return -1; |
| 549 | } |
| 550 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 551 | static int int_bind(const char *port, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 552 | struct mgcp_rtp_end *end, int (*cb)(struct osmo_fd *, unsigned), |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 553 | struct mgcp_endpoint *_endp, int rtp_port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 554 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 555 | if (end->rtp.fd != -1 || end->rtcp.fd != -1) { |
| 556 | LOGP(DMGCP, LOGL_ERROR, "Previous %s was still bound on %d\n", |
| 557 | port, ENDPOINT_NUMBER(_endp)); |
| 558 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 7fe2a3d | 2010-08-06 07:18:22 +0800 | [diff] [blame] | 559 | } |
| 560 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 561 | end->local_port = rtp_port; |
| 562 | end->rtp.cb = cb; |
| 563 | end->rtp.data = _endp; |
| 564 | end->rtcp.data = _endp; |
| 565 | end->rtcp.cb = cb; |
| 566 | return bind_rtp(_endp->cfg, end, ENDPOINT_NUMBER(_endp)); |
| 567 | } |
| 568 | |
| 569 | |
| 570 | int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 571 | { |
| 572 | return int_bind("bts-port", &endp->bts_end, |
| 573 | rtp_data_bts, endp, rtp_port); |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 577 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 578 | return int_bind("net-port", &endp->net_end, |
| 579 | rtp_data_net, endp, rtp_port); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 580 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 581 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 582 | int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 583 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 584 | return int_bind("trans-net", &endp->trans_net, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 585 | rtp_data_trans_net, endp, rtp_port); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 586 | } |
| 587 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 588 | int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 589 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 590 | return int_bind("trans-bts", &endp->trans_bts, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 591 | rtp_data_trans_bts, endp, rtp_port); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 592 | } |
| 593 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 594 | int mgcp_free_rtp_port(struct mgcp_rtp_end *end) |
| 595 | { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 596 | if (end->rtp.fd != -1) { |
| 597 | close(end->rtp.fd); |
| 598 | end->rtp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 599 | osmo_fd_unregister(&end->rtp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | if (end->rtcp.fd != -1) { |
| 603 | close(end->rtcp.fd); |
| 604 | end->rtcp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 605 | osmo_fd_unregister(&end->rtcp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | return 0; |
| 609 | } |