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 | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 5 | * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2012 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> |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 43 | #include <time.h> |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 44 | |
| 45 | #ifndef __BYTE_ORDER |
Tobias Engel | aff2071 | 2012-10-24 17:53:50 +0200 | [diff] [blame] | 46 | # ifdef __APPLE__ |
| 47 | # define __BYTE_ORDER __DARWIN_BYTE_ORDER |
| 48 | # define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN |
| 49 | # define __BIG_ENDIAN __DARWIN_BIG_ENDIAN |
| 50 | # else |
| 51 | # error "__BYTE_ORDER should be defined by someone" |
| 52 | # endif |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 53 | #endif |
| 54 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 55 | /* according to rtp_proxy.c RFC 3550 */ |
| 56 | struct rtp_hdr { |
| 57 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 58 | uint8_t csrc_count:4, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 59 | extension:1, |
| 60 | padding:1, |
| 61 | version:2; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 62 | uint8_t payload_type:7, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 63 | marker:1; |
| 64 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 65 | uint8_t version:2, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 66 | padding:1, |
| 67 | extension:1, |
| 68 | csrc_count:4; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 69 | uint8_t marker:1, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 70 | payload_type:7; |
| 71 | #endif |
Holger Hans Peter Freyther | d340cd3 | 2010-07-23 18:56:01 +0800 | [diff] [blame] | 72 | uint16_t sequence; |
Holger Hans Peter Freyther | d9b18f8 | 2010-07-23 18:55:38 +0800 | [diff] [blame] | 73 | uint32_t timestamp; |
| 74 | uint32_t ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 75 | } __attribute__((packed)); |
| 76 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 77 | #define RTP_SEQ_MOD (1 << 16) |
| 78 | #define RTP_MAX_DROPOUT 3000 |
| 79 | #define RTP_MAX_MISORDER 100 |
| 80 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 81 | |
| 82 | enum { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 83 | MGCP_DEST_NET = 0, |
| 84 | MGCP_DEST_BTS, |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | enum { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 88 | MGCP_PROTO_RTP, |
| 89 | MGCP_PROTO_RTCP, |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 90 | }; |
| 91 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 92 | #define MGCP_DUMMY_LOAD 0x23 |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 93 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 94 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 95 | /** |
| 96 | * This does not need to be a precision timestamp and |
| 97 | * is allowed to wrap quite fast. The returned value is |
| 98 | * milli seconds now. |
| 99 | */ |
| 100 | uint32_t get_current_ts(void) |
| 101 | { |
| 102 | struct timespec tp; |
| 103 | uint64_t ret; |
| 104 | |
| 105 | memset(&tp, 0, sizeof(tp)); |
| 106 | if (clock_gettime(CLOCK_MONOTONIC, &tp) != 0) |
| 107 | LOGP(DMGCP, LOGL_NOTICE, |
| 108 | "Getting the clock failed.\n"); |
| 109 | |
| 110 | /* convert it to useconds */ |
| 111 | ret = tp.tv_sec; |
| 112 | ret *= 1000; |
| 113 | ret += tp.tv_nsec / 1000 / 1000; |
| 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 118 | static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len) |
| 119 | { |
| 120 | struct sockaddr_in out; |
| 121 | out.sin_family = AF_INET; |
| 122 | out.sin_port = port; |
| 123 | memcpy(&out.sin_addr, addr, sizeof(*addr)); |
| 124 | |
| 125 | return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out)); |
| 126 | } |
| 127 | |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 128 | int mgcp_send_dummy(struct mgcp_endpoint *endp) |
| 129 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 130 | static char buf[] = { MGCP_DUMMY_LOAD }; |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 131 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 132 | 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] | 133 | endp->net_end.rtp_port, buf, 1); |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 134 | } |
| 135 | |
Holger Hans Peter Freyther | 1e85af6 | 2012-10-22 17:15:31 +0200 | [diff] [blame] | 136 | /** |
| 137 | * The RFC 3550 Appendix A assumes there are multiple sources but |
| 138 | * some of the supported endpoints (e.g. the nanoBTS) can only handle |
| 139 | * one source and this code will patch packages to appear as if there |
| 140 | * is only one source. |
| 141 | * There is also no probation period for new sources. Every package |
| 142 | * we receive will be seen as a switch in streams. |
| 143 | */ |
Holger Hans Peter Freyther | c02f11a | 2010-08-04 22:20:34 +0800 | [diff] [blame] | 144 | static void patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state, |
| 145 | int payload, struct sockaddr_in *addr, char *data, int len) |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 146 | { |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 147 | uint32_t arrival_time; |
| 148 | int32_t transit, d; |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 149 | uint16_t seq, udelta; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 150 | uint32_t timestamp; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 151 | struct rtp_hdr *rtp_hdr; |
| 152 | |
| 153 | if (len < sizeof(*rtp_hdr)) |
| 154 | return; |
| 155 | |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 156 | rtp_hdr = (struct rtp_hdr *) data; |
| 157 | seq = ntohs(rtp_hdr->sequence); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 158 | timestamp = ntohl(rtp_hdr->timestamp); |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 159 | arrival_time = get_current_ts(); |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 160 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 161 | if (!state->initialized) { |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 162 | state->base_seq = seq; |
| 163 | state->max_seq = seq - 1; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 164 | state->ssrc = state->orig_ssrc = rtp_hdr->ssrc; |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 165 | state->initialized = 1; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 166 | state->last_timestamp = timestamp; |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 167 | state->jitter = 0; |
| 168 | state->transit = arrival_time - timestamp; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 169 | } else if (state->ssrc != rtp_hdr->ssrc) { |
| 170 | state->ssrc = rtp_hdr->ssrc; |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 171 | state->seq_offset = (state->max_seq + 1) - seq; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 172 | state->timestamp_offset = state->last_timestamp - timestamp; |
Holger Hans Peter Freyther | 6357a8e | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 173 | state->patch = endp->allow_patch; |
Holger Hans Peter Freyther | 2f10458 | 2010-08-04 21:45:39 +0800 | [diff] [blame] | 174 | LOGP(DMGCP, LOGL_NOTICE, |
Holger Hans Peter Freyther | f1f6bba | 2010-08-04 22:14:46 +0800 | [diff] [blame] | 175 | "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] | 176 | ENDPOINT_NUMBER(endp), state->ssrc, state->seq_offset, |
| 177 | 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] | 178 | } |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 179 | |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 180 | /* apply the offset and store it back to the packet */ |
Holger Hans Peter Freyther | 5c1e6cf | 2010-08-03 15:36:57 +0000 | [diff] [blame] | 181 | if (state->patch) { |
| 182 | seq += state->seq_offset; |
| 183 | rtp_hdr->sequence = htons(seq); |
| 184 | rtp_hdr->ssrc = state->orig_ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 185 | |
Holger Hans Peter Freyther | 5c1e6cf | 2010-08-03 15:36:57 +0000 | [diff] [blame] | 186 | timestamp += state->timestamp_offset; |
| 187 | rtp_hdr->timestamp = htonl(timestamp); |
| 188 | } |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 189 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 190 | /* |
| 191 | * The below takes the shape of the validation from Appendix A. Check |
| 192 | * if there is something weird with the sequence number, otherwise check |
| 193 | * for a wrap around in the sequence number. |
| 194 | */ |
| 195 | udelta = seq - state->max_seq; |
| 196 | if (udelta < RTP_MAX_DROPOUT) { |
| 197 | if (seq < state->max_seq) |
| 198 | state->cycles += RTP_SEQ_MOD; |
Holger Hans Peter Freyther | 7e7ee5f | 2012-12-16 13:07:45 +0100 | [diff] [blame] | 199 | } else if (udelta <= RTP_SEQ_MOD - RTP_MAX_MISORDER) { |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 200 | LOGP(DMGCP, LOGL_NOTICE, |
| 201 | "RTP seqno made a very large jump on 0x%x delta: %u\n", |
| 202 | ENDPOINT_NUMBER(endp), udelta); |
| 203 | } |
| 204 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 205 | /* |
| 206 | * calculate the jitter between the two packages. The TS should be |
| 207 | * taken closer to the read function. This was taken from the |
| 208 | * Appendix A of RFC 3550. The local timestamp has a usec resolution. |
| 209 | */ |
| 210 | transit = arrival_time - timestamp; |
| 211 | d = transit - state->transit; |
| 212 | state->transit = transit; |
| 213 | if (d < 0) |
| 214 | d = -d; |
| 215 | state->jitter += d - ((state->jitter + 8) >> 4); |
| 216 | |
| 217 | |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 218 | state->max_seq = seq; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 219 | state->last_timestamp = timestamp; |
| 220 | |
Holger Hans Peter Freyther | 7279d24 | 2010-04-06 11:15:50 +0200 | [diff] [blame] | 221 | if (payload < 0) |
| 222 | return; |
| 223 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 224 | rtp_hdr->payload_type = payload; |
| 225 | } |
| 226 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 227 | /* |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 228 | * The below code is for dispatching. We have a dedicated port for |
| 229 | * 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] | 230 | */ |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 231 | static int forward_data(int fd, struct mgcp_rtp_tap *tap, const char *buf, int len) |
| 232 | { |
| 233 | if (!tap->enabled) |
| 234 | return 0; |
| 235 | |
| 236 | return sendto(fd, buf, len, 0, |
| 237 | (struct sockaddr *)&tap->forward, sizeof(tap->forward)); |
| 238 | } |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 239 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 240 | static int mgcp_send_transcoder(struct mgcp_rtp_end *end, |
| 241 | struct mgcp_config *cfg, int is_rtp, |
| 242 | const char *buf, int len) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 243 | { |
| 244 | int rc; |
| 245 | int port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 246 | struct sockaddr_in addr; |
| 247 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 248 | port = is_rtp ? end->rtp_port : end->rtcp_port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 249 | |
| 250 | addr.sin_family = AF_INET; |
| 251 | addr.sin_addr = cfg->transcoder_in; |
Holger Hans Peter Freyther | 5f2cd84 | 2010-11-01 21:53:39 +0100 | [diff] [blame] | 252 | addr.sin_port = port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 253 | |
| 254 | rc = sendto(is_rtp ? |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 255 | end->rtp.fd : |
| 256 | end->rtcp.fd, buf, len, 0, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 257 | (struct sockaddr *) &addr, sizeof(addr)); |
| 258 | |
| 259 | if (rc != len) |
| 260 | LOGP(DMGCP, LOGL_ERROR, |
| 261 | "Failed to send data to the transcoder: %s\n", |
| 262 | strerror(errno)); |
| 263 | |
| 264 | return rc; |
| 265 | } |
| 266 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 267 | static int mgcp_send(struct mgcp_endpoint *endp, int dest, int is_rtp, |
| 268 | struct sockaddr_in *addr, char *buf, int rc) |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 269 | { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 270 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 271 | /* For loop toggle the destination and then dispatch. */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 272 | if (tcfg->audio_loop) |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 273 | dest = !dest; |
| 274 | |
| 275 | /* Loop based on the conn_mode, maybe undoing the above */ |
| 276 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 277 | dest = !dest; |
| 278 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 279 | if (dest == MGCP_DEST_NET) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 280 | if (is_rtp) { |
| 281 | patch_and_count(endp, &endp->bts_state, |
| 282 | endp->net_end.payload_type, |
| 283 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 284 | forward_data(endp->net_end.rtp.fd, |
| 285 | &endp->taps[MGCP_TAP_NET_OUT], buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 286 | return udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, |
| 287 | endp->net_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 288 | } else if (!tcfg->omit_rtcp) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 289 | return udp_send(endp->net_end.rtcp.fd, &endp->net_end.addr, |
| 290 | endp->net_end.rtcp_port, buf, rc); |
| 291 | } |
| 292 | } else { |
| 293 | if (is_rtp) { |
| 294 | patch_and_count(endp, &endp->net_state, |
| 295 | endp->bts_end.payload_type, |
| 296 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 297 | forward_data(endp->bts_end.rtp.fd, |
| 298 | &endp->taps[MGCP_TAP_BTS_OUT], buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 299 | return udp_send(endp->bts_end.rtp.fd, &endp->bts_end.addr, |
| 300 | endp->bts_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 301 | } else if (!tcfg->omit_rtcp) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 302 | return udp_send(endp->bts_end.rtcp.fd, &endp->bts_end.addr, |
| 303 | endp->bts_end.rtcp_port, buf, rc); |
| 304 | } |
| 305 | } |
Holger Hans Peter Freyther | 8c3d069 | 2012-09-11 12:31:25 +0200 | [diff] [blame] | 306 | |
| 307 | return 0; |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 308 | } |
| 309 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 310 | static int receive_from(struct mgcp_endpoint *endp, int fd, struct sockaddr_in *addr, |
| 311 | char *buf, int bufsize) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 312 | { |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 313 | int rc; |
| 314 | socklen_t slen = sizeof(*addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 315 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 316 | rc = recvfrom(fd, buf, bufsize, 0, |
| 317 | (struct sockaddr *) addr, &slen); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 318 | if (rc < 0) { |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 319 | LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x errno: %d/%s\n", |
| 320 | ENDPOINT_NUMBER(endp), errno, strerror(errno)); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 321 | return -1; |
| 322 | } |
| 323 | |
| 324 | /* 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] | 325 | if (!endp->allocated) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 326 | return -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 327 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 328 | #warning "Slight spec violation. With connection mode recvonly we should attempt to forward." |
| 329 | |
| 330 | return rc; |
| 331 | } |
| 332 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 333 | 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] | 334 | { |
| 335 | char buf[4096]; |
| 336 | struct sockaddr_in addr; |
| 337 | struct mgcp_endpoint *endp; |
| 338 | int rc, proto; |
| 339 | |
| 340 | endp = (struct mgcp_endpoint *) fd->data; |
| 341 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 342 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 343 | if (rc <= 0) |
| 344 | return -1; |
| 345 | |
| 346 | if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) { |
| 347 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | eedb453 | 2012-11-12 10:55:29 +0100 | [diff] [blame] | 348 | "Endpoint 0x%x data from wrong address %s vs. ", |
| 349 | ENDPOINT_NUMBER(endp), inet_ntoa(addr.sin_addr)); |
| 350 | LOGPC(DMGCP, LOGL_ERROR, |
| 351 | "%s\n", inet_ntoa(endp->net_end.addr)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 352 | return -1; |
| 353 | } |
| 354 | |
| 355 | if (endp->net_end.rtp_port != addr.sin_port && |
| 356 | endp->net_end.rtcp_port != addr.sin_port) { |
| 357 | LOGP(DMGCP, LOGL_ERROR, |
| 358 | "Data from wrong source port %d on 0x%x\n", |
| 359 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 364 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 365 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from network on 0x%x\n", |
| 366 | ENDPOINT_NUMBER(endp)); |
| 367 | return 0; |
| 368 | } |
| 369 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 370 | proto = fd == &endp->net_end.rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 371 | endp->net_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 372 | endp->net_end.octets += rc; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 373 | |
| 374 | forward_data(fd->fd, &endp->taps[MGCP_TAP_NET_IN], buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 375 | |
| 376 | switch (endp->type) { |
| 377 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 378 | return mgcp_send(endp, MGCP_DEST_BTS, proto == MGCP_PROTO_RTP, |
| 379 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 380 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 381 | return mgcp_send_transcoder(&endp->trans_net, endp->cfg, |
| 382 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 386 | endp->type, ENDPOINT_NUMBER(endp)); |
| 387 | return 0; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 388 | } |
| 389 | |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 390 | static void discover_bts(struct mgcp_endpoint *endp, int proto, struct sockaddr_in *addr) |
| 391 | { |
| 392 | struct mgcp_config *cfg = endp->cfg; |
| 393 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 394 | if (proto == MGCP_PROTO_RTP && endp->bts_end.rtp_port == 0) { |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 395 | if (!cfg->bts_ip || |
| 396 | memcmp(&addr->sin_addr, |
| 397 | &cfg->bts_in, sizeof(cfg->bts_in)) == 0 || |
| 398 | memcmp(&addr->sin_addr, |
| 399 | &endp->bts_end.addr, sizeof(endp->bts_end.addr)) == 0) { |
| 400 | |
| 401 | endp->bts_end.rtp_port = addr->sin_port; |
| 402 | endp->bts_end.addr = addr->sin_addr; |
| 403 | |
| 404 | LOGP(DMGCP, LOGL_NOTICE, |
| 405 | "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n", |
| 406 | ENDPOINT_NUMBER(endp), ntohs(endp->bts_end.rtp_port), |
| 407 | ntohs(endp->bts_end.rtcp_port), inet_ntoa(addr->sin_addr)); |
| 408 | } |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 409 | } else if (proto == MGCP_PROTO_RTCP && endp->bts_end.rtcp_port == 0) { |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 410 | if (memcmp(&endp->bts_end.addr, &addr->sin_addr, |
| 411 | sizeof(endp->bts_end.addr)) == 0) { |
| 412 | endp->bts_end.rtcp_port = addr->sin_port; |
| 413 | } |
| 414 | } |
| 415 | } |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 416 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 417 | 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] | 418 | { |
| 419 | char buf[4096]; |
| 420 | struct sockaddr_in addr; |
| 421 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 422 | int rc, proto; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 423 | |
| 424 | endp = (struct mgcp_endpoint *) fd->data; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 425 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 426 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 427 | if (rc <= 0) |
| 428 | return -1; |
| 429 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 430 | proto = fd == &endp->bts_end.rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 431 | |
| 432 | /* 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] | 433 | /* it was the BTS... */ |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 434 | discover_bts(endp, proto, &addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 435 | |
Holger Hans Peter Freyther | ea97fbf | 2010-08-05 10:53:26 +0000 | [diff] [blame] | 436 | if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) { |
| 437 | LOGP(DMGCP, LOGL_ERROR, |
| 438 | "Data from wrong bts %s on 0x%x\n", |
| 439 | inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); |
| 440 | return -1; |
| 441 | } |
| 442 | |
| 443 | if (endp->bts_end.rtp_port != addr.sin_port && |
| 444 | endp->bts_end.rtcp_port != addr.sin_port) { |
| 445 | LOGP(DMGCP, LOGL_ERROR, |
| 446 | "Data from wrong bts source port %d on 0x%x\n", |
| 447 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 448 | return -1; |
| 449 | } |
| 450 | |
Holger Hans Peter Freyther | b3c206a | 2010-05-14 02:18:59 +0800 | [diff] [blame] | 451 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 452 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 453 | 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] | 454 | ENDPOINT_NUMBER(endp)); |
| 455 | return 0; |
| 456 | } |
| 457 | |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 458 | /* do this before the loop handling */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 459 | endp->bts_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 460 | endp->bts_end.octets += rc; |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 461 | |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 462 | forward_data(fd->fd, &endp->taps[MGCP_TAP_BTS_IN], buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 463 | |
| 464 | switch (endp->type) { |
| 465 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 466 | return mgcp_send(endp, MGCP_DEST_NET, proto == MGCP_PROTO_RTP, |
| 467 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 468 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 469 | return mgcp_send_transcoder(&endp->trans_bts, endp->cfg, |
| 470 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 474 | endp->type, ENDPOINT_NUMBER(endp)); |
| 475 | return 0; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 476 | } |
| 477 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 478 | 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] | 479 | int dest, struct osmo_fd *fd) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 480 | { |
| 481 | char buf[4096]; |
| 482 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 483 | struct mgcp_config *cfg; |
| 484 | int rc, proto; |
| 485 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 486 | cfg = _endp->cfg; |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 487 | rc = receive_from(_endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 488 | if (rc <= 0) |
| 489 | return -1; |
| 490 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 491 | proto = fd == &end->rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 492 | |
| 493 | if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) { |
| 494 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 495 | "Data not coming from transcoder dest: %d %s on 0x%x\n", |
| 496 | dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 497 | return -1; |
| 498 | } |
| 499 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 500 | if (end->rtp_port != addr.sin_port && |
| 501 | end->rtcp_port != addr.sin_port) { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 502 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 503 | "Data from wrong transcoder dest %d source port %d on 0x%x\n", |
| 504 | dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 505 | return -1; |
| 506 | } |
| 507 | |
| 508 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 509 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 510 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n", |
| 511 | dest, ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 512 | return 0; |
| 513 | } |
| 514 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 515 | end->packets += 1; |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 516 | return mgcp_send(_endp, dest, proto == MGCP_PROTO_RTP, &addr, buf, rc); |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 517 | } |
| 518 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 519 | 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] | 520 | { |
| 521 | struct mgcp_endpoint *endp; |
| 522 | endp = (struct mgcp_endpoint *) fd->data; |
| 523 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 524 | return rtp_data_transcoder(&endp->trans_net, endp, MGCP_DEST_NET, fd); |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 525 | } |
| 526 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 527 | 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] | 528 | { |
| 529 | struct mgcp_endpoint *endp; |
| 530 | endp = (struct mgcp_endpoint *) fd->data; |
| 531 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 532 | return rtp_data_transcoder(&endp->trans_bts, endp, MGCP_DEST_BTS, fd); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 533 | } |
| 534 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 535 | static int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, |
| 536 | int port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 537 | { |
| 538 | struct sockaddr_in addr; |
| 539 | int on = 1; |
| 540 | |
| 541 | fd->fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 542 | if (fd->fd < 0) { |
| 543 | LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n"); |
| 544 | return -1; |
| 545 | } |
| 546 | |
| 547 | setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 548 | memset(&addr, 0, sizeof(addr)); |
| 549 | addr.sin_family = AF_INET; |
| 550 | addr.sin_port = htons(port); |
| 551 | inet_aton(source_addr, &addr.sin_addr); |
| 552 | |
| 553 | if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 6f36e92 | 2010-08-06 03:00:17 +0800 | [diff] [blame] | 554 | close(fd->fd); |
| 555 | fd->fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 556 | return -1; |
| 557 | } |
| 558 | |
| 559 | return 0; |
| 560 | } |
| 561 | |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 562 | static int set_ip_tos(int fd, int tos) |
| 563 | { |
| 564 | int ret; |
| 565 | ret = setsockopt(fd, IPPROTO_IP, IP_TOS, |
| 566 | &tos, sizeof(tos)); |
| 567 | return ret != 0; |
| 568 | } |
| 569 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 570 | 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] | 571 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 572 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtp, |
| 573 | rtp_end->local_port) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 574 | 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] | 575 | cfg->source_addr, rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 576 | goto cleanup0; |
| 577 | } |
| 578 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame^] | 579 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtcp, |
| 580 | rtp_end->local_port + 1) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 581 | 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] | 582 | cfg->source_addr, rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 583 | goto cleanup1; |
| 584 | } |
| 585 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 586 | set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp); |
| 587 | set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp); |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 588 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 589 | rtp_end->rtp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 590 | if (osmo_fd_register(&rtp_end->rtp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 591 | 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] | 592 | rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 593 | goto cleanup2; |
| 594 | } |
| 595 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 596 | rtp_end->rtcp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 597 | if (osmo_fd_register(&rtp_end->rtcp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 598 | 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] | 599 | rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 600 | goto cleanup3; |
| 601 | } |
| 602 | |
| 603 | return 0; |
| 604 | |
| 605 | cleanup3: |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 606 | osmo_fd_unregister(&rtp_end->rtp); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 607 | cleanup2: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 608 | close(rtp_end->rtcp.fd); |
| 609 | rtp_end->rtcp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 610 | cleanup1: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 611 | close(rtp_end->rtp.fd); |
| 612 | rtp_end->rtp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 613 | cleanup0: |
| 614 | return -1; |
| 615 | } |
| 616 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 617 | static int int_bind(const char *port, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 618 | 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] | 619 | struct mgcp_endpoint *_endp, int rtp_port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 620 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 621 | if (end->rtp.fd != -1 || end->rtcp.fd != -1) { |
| 622 | LOGP(DMGCP, LOGL_ERROR, "Previous %s was still bound on %d\n", |
| 623 | port, ENDPOINT_NUMBER(_endp)); |
| 624 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 7fe2a3d | 2010-08-06 07:18:22 +0800 | [diff] [blame] | 625 | } |
| 626 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 627 | end->local_port = rtp_port; |
| 628 | end->rtp.cb = cb; |
| 629 | end->rtp.data = _endp; |
| 630 | end->rtcp.data = _endp; |
| 631 | end->rtcp.cb = cb; |
| 632 | return bind_rtp(_endp->cfg, end, ENDPOINT_NUMBER(_endp)); |
| 633 | } |
| 634 | |
| 635 | |
| 636 | int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 637 | { |
| 638 | return int_bind("bts-port", &endp->bts_end, |
| 639 | rtp_data_bts, endp, rtp_port); |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 643 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 644 | return int_bind("net-port", &endp->net_end, |
| 645 | rtp_data_net, endp, rtp_port); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 646 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 647 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 648 | 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] | 649 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 650 | return int_bind("trans-net", &endp->trans_net, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 651 | rtp_data_trans_net, endp, rtp_port); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 652 | } |
| 653 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 654 | int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 655 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 656 | return int_bind("trans-bts", &endp->trans_bts, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 657 | rtp_data_trans_bts, endp, rtp_port); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 658 | } |
| 659 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 660 | int mgcp_free_rtp_port(struct mgcp_rtp_end *end) |
| 661 | { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 662 | if (end->rtp.fd != -1) { |
| 663 | close(end->rtp.fd); |
| 664 | end->rtp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 665 | osmo_fd_unregister(&end->rtp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 666 | } |
| 667 | |
| 668 | if (end->rtcp.fd != -1) { |
| 669 | close(end->rtcp.fd); |
| 670 | end->rtcp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 671 | osmo_fd_unregister(&end->rtcp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | return 0; |
| 675 | } |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 676 | |
| 677 | |
| 678 | void mgcp_state_calc_loss(struct mgcp_rtp_state *state, |
| 679 | struct mgcp_rtp_end *end, uint32_t *expected, |
| 680 | int *loss) |
| 681 | { |
| 682 | *expected = state->cycles + state->max_seq; |
| 683 | *expected = *expected - state->base_seq + 1; |
| 684 | |
| 685 | if (!state->initialized) { |
| 686 | *expected = 0; |
| 687 | *loss = 0; |
| 688 | return; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * Make sure the sign is correct and use the biggest |
| 693 | * positive/negative number that fits. |
| 694 | */ |
| 695 | *loss = *expected - end->packets; |
| 696 | if (*expected < end->packets) { |
| 697 | if (*loss > 0) |
| 698 | *loss = INT_MIN; |
| 699 | } else { |
| 700 | if (*loss < 0) |
| 701 | *loss = INT_MAX; |
| 702 | } |
| 703 | } |
Holger Hans Peter Freyther | cb306a6 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 704 | |
| 705 | uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *state) |
| 706 | { |
| 707 | if (!state->initialized) |
| 708 | return 0; |
| 709 | return state->jitter >> 4; |
| 710 | } |