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 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 38 | #include <openbsc/osmux.h> |
| 39 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 40 | #warning "Make use of the rtp proxy code" |
| 41 | |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 42 | /* attempt to determine byte order */ |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 43 | #include <sys/param.h> |
| 44 | #include <limits.h> |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 45 | #include <time.h> |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 46 | |
| 47 | #ifndef __BYTE_ORDER |
Tobias Engel | aff2071 | 2012-10-24 17:53:50 +0200 | [diff] [blame] | 48 | # ifdef __APPLE__ |
| 49 | # define __BYTE_ORDER __DARWIN_BYTE_ORDER |
| 50 | # define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN |
| 51 | # define __BIG_ENDIAN __DARWIN_BIG_ENDIAN |
| 52 | # else |
| 53 | # error "__BYTE_ORDER should be defined by someone" |
| 54 | # endif |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 55 | #endif |
| 56 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 57 | /* according to rtp_proxy.c RFC 3550 */ |
| 58 | struct rtp_hdr { |
| 59 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 60 | uint8_t csrc_count:4, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 61 | extension:1, |
| 62 | padding:1, |
| 63 | version:2; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 64 | uint8_t payload_type:7, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 65 | marker:1; |
| 66 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 67 | uint8_t version:2, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 68 | padding:1, |
| 69 | extension:1, |
| 70 | csrc_count:4; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 71 | uint8_t marker:1, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 72 | payload_type:7; |
| 73 | #endif |
Holger Hans Peter Freyther | d340cd3 | 2010-07-23 18:56:01 +0800 | [diff] [blame] | 74 | uint16_t sequence; |
Holger Hans Peter Freyther | d9b18f8 | 2010-07-23 18:55:38 +0800 | [diff] [blame] | 75 | uint32_t timestamp; |
| 76 | uint32_t ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 77 | } __attribute__((packed)); |
| 78 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 79 | #define RTP_SEQ_MOD (1 << 16) |
| 80 | #define RTP_MAX_DROPOUT 3000 |
| 81 | #define RTP_MAX_MISORDER 100 |
Jacob Erlbeck | a0d64ce | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 82 | #define RTP_BUF_SIZE 4096 |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 83 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 84 | enum { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 85 | MGCP_PROTO_RTP, |
| 86 | MGCP_PROTO_RTCP, |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 87 | }; |
| 88 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 89 | /** |
| 90 | * This does not need to be a precision timestamp and |
| 91 | * is allowed to wrap quite fast. The returned value is |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 92 | * 1/unit seconds. |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 93 | */ |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 94 | static uint32_t get_current_ts(unsigned unit) |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 95 | { |
| 96 | struct timespec tp; |
| 97 | uint64_t ret; |
| 98 | |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 99 | if (!unit) |
| 100 | return 0; |
| 101 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 102 | memset(&tp, 0, sizeof(tp)); |
| 103 | if (clock_gettime(CLOCK_MONOTONIC, &tp) != 0) |
| 104 | LOGP(DMGCP, LOGL_NOTICE, |
| 105 | "Getting the clock failed.\n"); |
| 106 | |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 107 | /* convert it to 1/unit seconds */ |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 108 | ret = tp.tv_sec; |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 109 | ret *= unit; |
| 110 | ret += (int64_t)tp.tv_nsec * unit / 1000 / 1000 / 1000; |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 111 | |
| 112 | return ret; |
| 113 | } |
| 114 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 115 | int mgcp_udp_send(int fd, struct in_addr *addr, int port, char *buf, int len) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 116 | { |
| 117 | struct sockaddr_in out; |
| 118 | out.sin_family = AF_INET; |
| 119 | out.sin_port = port; |
| 120 | memcpy(&out.sin_addr, addr, sizeof(*addr)); |
| 121 | |
| 122 | return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out)); |
| 123 | } |
| 124 | |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 125 | int mgcp_send_dummy(struct mgcp_endpoint *endp) |
| 126 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 127 | static char buf[] = { MGCP_DUMMY_LOAD }; |
Jacob Erlbeck | 34bdc9f | 2013-12-19 18:25:54 +0100 | [diff] [blame] | 128 | int rc; |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 129 | |
Jacob Erlbeck | 34bdc9f | 2013-12-19 18:25:54 +0100 | [diff] [blame] | 130 | rc = mgcp_udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, |
| 131 | endp->net_end.rtp_port, buf, 1); |
| 132 | |
Jacob Erlbeck | 1dc022c | 2014-01-17 09:22:57 +0100 | [diff] [blame] | 133 | if (rc == -1) |
| 134 | goto failed; |
| 135 | |
| 136 | if (endp->tcfg->omit_rtcp) |
Jacob Erlbeck | 34bdc9f | 2013-12-19 18:25:54 +0100 | [diff] [blame] | 137 | return rc; |
| 138 | |
Jacob Erlbeck | 1dc022c | 2014-01-17 09:22:57 +0100 | [diff] [blame] | 139 | rc = mgcp_udp_send(endp->net_end.rtcp.fd, &endp->net_end.addr, |
| 140 | endp->net_end.rtcp_port, buf, 1); |
| 141 | |
| 142 | if (rc >= 0) |
| 143 | return rc; |
| 144 | |
| 145 | failed: |
| 146 | LOGP(DMGCP, LOGL_ERROR, |
| 147 | "Failed to send dummy packet: %s on: 0x%x to %s\n", |
| 148 | strerror(errno), ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr)); |
| 149 | |
| 150 | return -1; |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 151 | } |
| 152 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 153 | static int32_t compute_timestamp_aligment_error(struct mgcp_rtp_stream_state *sstate, |
| 154 | int ptime, uint32_t timestamp) |
| 155 | { |
| 156 | int32_t timestamp_delta; |
| 157 | |
| 158 | if (ptime == 0) |
| 159 | return 0; |
| 160 | |
| 161 | /* Align according to: T - Tlast = k * Tptime */ |
| 162 | timestamp_delta = timestamp - sstate->last_timestamp; |
| 163 | |
| 164 | return timestamp_delta % ptime; |
| 165 | } |
| 166 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 167 | static int check_rtp_timestamp(struct mgcp_endpoint *endp, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 168 | struct mgcp_rtp_state *state, |
| 169 | struct mgcp_rtp_stream_state *sstate, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 170 | struct mgcp_rtp_end *rtp_end, |
| 171 | struct sockaddr_in *addr, |
| 172 | uint16_t seq, uint32_t timestamp, |
| 173 | const char *text, int32_t *tsdelta_out) |
| 174 | { |
| 175 | int32_t tsdelta; |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 176 | int32_t timestamp_error; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 177 | |
| 178 | /* Not fully intialized, skip */ |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 179 | if (sstate->last_tsdelta == 0 && timestamp == sstate->last_timestamp) |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 180 | return 0; |
| 181 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 182 | if (seq == sstate->last_seq) { |
| 183 | if (timestamp != sstate->last_timestamp) { |
| 184 | sstate->err_ts_counter += 1; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 185 | LOGP(DMGCP, LOGL_ERROR, |
| 186 | "The %s timestamp delta is != 0 but the sequence " |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 187 | "number %d is the same, " |
| 188 | "TS offset: %d, SeqNo offset: %d " |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 189 | "on 0x%x SSRC: %u timestamp: %u " |
| 190 | "from %s:%d in %d\n", |
| 191 | text, seq, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 192 | state->timestamp_offset, state->seq_offset, |
| 193 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 194 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 195 | endp->conn_mode); |
| 196 | } |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | tsdelta = |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 201 | (int32_t)(timestamp - sstate->last_timestamp) / |
| 202 | (int16_t)(seq - sstate->last_seq); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 203 | |
| 204 | if (tsdelta == 0) { |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 205 | /* Don't update *tsdelta_out */ |
| 206 | LOGP(DMGCP, LOGL_NOTICE, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 207 | "The %s timestamp delta is %d " |
| 208 | "on 0x%x SSRC: %u timestamp: %u " |
| 209 | "from %s:%d in %d\n", |
| 210 | text, tsdelta, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 211 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 212 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 213 | endp->conn_mode); |
| 214 | |
| 215 | return 0; |
| 216 | } |
| 217 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 218 | if (sstate->last_tsdelta != tsdelta) { |
| 219 | if (sstate->last_tsdelta) { |
| 220 | LOGP(DMGCP, LOGL_INFO, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 221 | "The %s timestamp delta changes from %d to %d " |
| 222 | "on 0x%x SSRC: %u timestamp: %u from %s:%d in %d\n", |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 223 | text, sstate->last_tsdelta, tsdelta, |
| 224 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 225 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 226 | endp->conn_mode); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | if (tsdelta_out) |
| 231 | *tsdelta_out = tsdelta; |
| 232 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 233 | timestamp_error = |
| 234 | compute_timestamp_aligment_error(sstate, state->packet_duration, |
| 235 | timestamp); |
| 236 | |
| 237 | if (timestamp_error) { |
| 238 | sstate->err_ts_counter += 1; |
| 239 | LOGP(DMGCP, LOGL_NOTICE, |
| 240 | "The %s timestamp has an alignment error of %d " |
| 241 | "on 0x%x SSRC: %u " |
| 242 | "SeqNo delta: %d, TS delta: %d, dTS/dSeq: %d " |
| 243 | "from %s:%d in %d\n", |
| 244 | text, timestamp_error, |
| 245 | ENDPOINT_NUMBER(endp), sstate->ssrc, |
| 246 | (int16_t)(seq - sstate->last_seq), |
| 247 | (int32_t)(timestamp - sstate->last_timestamp), |
| 248 | tsdelta, |
| 249 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 250 | endp->conn_mode); |
| 251 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 252 | return 1; |
| 253 | } |
| 254 | |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 255 | /* Set the timestamp offset according to the packet duration. */ |
| 256 | static int adjust_rtp_timestamp_offset(struct mgcp_endpoint *endp, |
| 257 | struct mgcp_rtp_state *state, |
| 258 | struct mgcp_rtp_end *rtp_end, |
| 259 | struct sockaddr_in *addr, |
Jacob Erlbeck | 785e3c9 | 2013-12-19 17:50:27 +0100 | [diff] [blame] | 260 | int16_t delta_seq, uint32_t in_timestamp) |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 261 | { |
| 262 | int32_t tsdelta = state->packet_duration; |
| 263 | int timestamp_offset; |
Jacob Erlbeck | 785e3c9 | 2013-12-19 17:50:27 +0100 | [diff] [blame] | 264 | uint32_t out_timestamp; |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 265 | |
| 266 | if (tsdelta == 0) { |
| 267 | tsdelta = state->out_stream.last_tsdelta; |
| 268 | if (tsdelta != 0) { |
| 269 | LOGP(DMGCP, LOGL_NOTICE, |
| 270 | "A fixed packet duration is not available on 0x%x, " |
| 271 | "using last output timestamp delta instead: %d " |
| 272 | "from %s:%d in %d\n", |
| 273 | ENDPOINT_NUMBER(endp), tsdelta, |
| 274 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 275 | endp->conn_mode); |
| 276 | } else { |
| 277 | tsdelta = rtp_end->rate * 20 / 1000; |
| 278 | LOGP(DMGCP, LOGL_NOTICE, |
| 279 | "Fixed packet duration and last timestamp delta " |
| 280 | "are not available on 0x%x, " |
| 281 | "using fixed 20ms instead: %d " |
| 282 | "from %s:%d in %d\n", |
| 283 | ENDPOINT_NUMBER(endp), tsdelta, |
| 284 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 285 | endp->conn_mode); |
| 286 | } |
| 287 | } |
| 288 | |
Jacob Erlbeck | 785e3c9 | 2013-12-19 17:50:27 +0100 | [diff] [blame] | 289 | out_timestamp = state->out_stream.last_timestamp + delta_seq * tsdelta; |
| 290 | timestamp_offset = out_timestamp - in_timestamp; |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 291 | |
| 292 | if (state->timestamp_offset != timestamp_offset) { |
| 293 | state->timestamp_offset = timestamp_offset; |
| 294 | |
| 295 | LOGP(DMGCP, LOGL_NOTICE, |
| 296 | "Timestamp offset change on 0x%x SSRC: %u " |
| 297 | "SeqNo delta: %d, TS offset: %d, " |
| 298 | "from %s:%d in %d\n", |
| 299 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
| 300 | delta_seq, state->timestamp_offset, |
| 301 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 302 | endp->conn_mode); |
| 303 | } |
| 304 | |
| 305 | return timestamp_offset; |
| 306 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 307 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 308 | /* Set the timestamp offset according to the packet duration. */ |
| 309 | static int align_rtp_timestamp_offset(struct mgcp_endpoint *endp, |
| 310 | struct mgcp_rtp_state *state, |
| 311 | struct mgcp_rtp_end *rtp_end, |
| 312 | struct sockaddr_in *addr, |
| 313 | uint32_t timestamp) |
| 314 | { |
| 315 | int timestamp_error = 0; |
| 316 | int ptime = state->packet_duration; |
| 317 | |
| 318 | /* Align according to: T + Toffs - Tlast = k * Tptime */ |
| 319 | |
| 320 | timestamp_error = compute_timestamp_aligment_error( |
| 321 | &state->out_stream, ptime, |
| 322 | timestamp + state->timestamp_offset); |
| 323 | |
| 324 | if (timestamp_error) { |
| 325 | state->timestamp_offset += ptime - timestamp_error; |
| 326 | |
| 327 | LOGP(DMGCP, LOGL_NOTICE, |
| 328 | "Corrected timestamp alignment error of %d on 0x%x SSRC: %u " |
| 329 | "new TS offset: %d, " |
| 330 | "from %s:%d in %d\n", |
| 331 | timestamp_error, |
| 332 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
| 333 | state->timestamp_offset, inet_ntoa(addr->sin_addr), |
| 334 | ntohs(addr->sin_port), endp->conn_mode); |
| 335 | } |
| 336 | |
| 337 | OSMO_ASSERT(compute_timestamp_aligment_error(&state->out_stream, ptime, |
| 338 | timestamp + state->timestamp_offset) == 0); |
| 339 | |
| 340 | return timestamp_error; |
| 341 | } |
| 342 | |
Jacob Erlbeck | 42a833e | 2014-04-14 10:31:47 +0200 | [diff] [blame] | 343 | int mgcp_rtp_processing_default(struct mgcp_endpoint *endp, struct mgcp_rtp_end *dst_end, |
Jacob Erlbeck | a0d64ce | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 344 | char *data, int *len, int buf_size) |
| 345 | { |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp, |
| 350 | struct mgcp_rtp_end *dst_end, |
| 351 | struct mgcp_rtp_end *src_end) |
| 352 | { |
| 353 | return 0; |
| 354 | } |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 355 | |
Jacob Erlbeck | 168ca00 | 2014-03-17 12:40:07 +0100 | [diff] [blame] | 356 | void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp, |
| 357 | int *payload_type, |
| 358 | const char**audio_name, |
| 359 | const char**fmtp_extra) |
| 360 | { |
| 361 | /* Use the BTS side parameters when passing the SDP data (for |
| 362 | * downlink) to the net peer. |
| 363 | */ |
| 364 | *payload_type = endp->bts_end.payload_type; |
| 365 | *audio_name = endp->bts_end.audio_name; |
| 366 | *fmtp_extra = endp->bts_end.fmtp_extra; |
| 367 | } |
| 368 | |
Holger Hans Peter Freyther | 1e85af6 | 2012-10-22 17:15:31 +0200 | [diff] [blame] | 369 | /** |
| 370 | * The RFC 3550 Appendix A assumes there are multiple sources but |
| 371 | * some of the supported endpoints (e.g. the nanoBTS) can only handle |
| 372 | * one source and this code will patch packages to appear as if there |
| 373 | * is only one source. |
| 374 | * There is also no probation period for new sources. Every package |
| 375 | * we receive will be seen as a switch in streams. |
| 376 | */ |
Jacob Erlbeck | d62419b | 2013-11-25 12:53:29 +0100 | [diff] [blame] | 377 | void mgcp_patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state, |
| 378 | struct mgcp_rtp_end *rtp_end, struct sockaddr_in *addr, |
| 379 | char *data, int len) |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 380 | { |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 381 | uint32_t arrival_time; |
| 382 | int32_t transit, d; |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 383 | uint16_t seq, udelta; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 384 | uint32_t timestamp, ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 385 | struct rtp_hdr *rtp_hdr; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 386 | int payload = rtp_end->payload_type; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 387 | |
| 388 | if (len < sizeof(*rtp_hdr)) |
| 389 | return; |
| 390 | |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 391 | rtp_hdr = (struct rtp_hdr *) data; |
| 392 | seq = ntohs(rtp_hdr->sequence); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 393 | timestamp = ntohl(rtp_hdr->timestamp); |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 394 | arrival_time = get_current_ts(rtp_end->rate); |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 395 | ssrc = ntohl(rtp_hdr->ssrc); |
Jacob Erlbeck | b281e4e | 2014-01-30 21:01:36 +0100 | [diff] [blame] | 396 | transit = arrival_time - timestamp; |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 397 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 398 | if (!state->initialized) { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 399 | state->in_stream.last_seq = seq - 1; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 400 | state->in_stream.ssrc = state->orig_ssrc = ssrc; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 401 | state->in_stream.last_tsdelta = 0; |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 402 | state->base_seq = seq; |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 403 | state->initialized = 1; |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 404 | state->jitter = 0; |
Jacob Erlbeck | b281e4e | 2014-01-30 21:01:36 +0100 | [diff] [blame] | 405 | state->transit = transit; |
Jacob Erlbeck | f6ec0e9 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 406 | state->packet_duration = mgcp_rtp_packet_duration(endp, rtp_end); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 407 | state->out_stream = state->in_stream; |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 408 | state->out_stream.last_timestamp = timestamp; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 409 | state->out_stream.ssrc = ssrc - 1; /* force output SSRC change */ |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 410 | LOGP(DMGCP, LOGL_INFO, |
| 411 | "Initializing stream on 0x%x SSRC: %u timestamp: %u " |
Jacob Erlbeck | 30ce422 | 2013-12-05 12:02:15 +0100 | [diff] [blame] | 412 | "pkt-duration: %d, from %s:%d in %d\n", |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 413 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
Jacob Erlbeck | 30ce422 | 2013-12-05 12:02:15 +0100 | [diff] [blame] | 414 | state->seq_offset, state->packet_duration, |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 415 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 416 | endp->conn_mode); |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 417 | if (state->packet_duration == 0) { |
| 418 | state->packet_duration = rtp_end->rate * 20 / 1000; |
| 419 | LOGP(DMGCP, LOGL_NOTICE, |
| 420 | "Fixed packet duration is not available on 0x%x, " |
| 421 | "using fixed 20ms instead: %d from %s:%d in %d\n", |
| 422 | ENDPOINT_NUMBER(endp), state->packet_duration, |
| 423 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 424 | endp->conn_mode); |
| 425 | } |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 426 | } else if (state->in_stream.ssrc != ssrc) { |
Jacob Erlbeck | 5e9549e | 2013-12-05 12:20:05 +0100 | [diff] [blame] | 427 | LOGP(DMGCP, LOGL_NOTICE, |
| 428 | "The SSRC changed on 0x%x: %u -> %u " |
| 429 | "from %s:%d in %d\n", |
| 430 | ENDPOINT_NUMBER(endp), |
| 431 | state->in_stream.ssrc, rtp_hdr->ssrc, |
| 432 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 433 | endp->conn_mode); |
| 434 | |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 435 | state->in_stream.ssrc = ssrc; |
Jacob Erlbeck | b281e4e | 2014-01-30 21:01:36 +0100 | [diff] [blame] | 436 | state->jitter = 0; |
| 437 | state->transit = transit; |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 438 | if (rtp_end->force_constant_ssrc) { |
Jacob Erlbeck | eacc9b9 | 2014-01-30 21:01:35 +0100 | [diff] [blame] | 439 | int16_t delta_seq; |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 440 | |
Jacob Erlbeck | eacc9b9 | 2014-01-30 21:01:35 +0100 | [diff] [blame] | 441 | /* Always increment seqno by 1 */ |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 442 | state->seq_offset = |
Jacob Erlbeck | eacc9b9 | 2014-01-30 21:01:35 +0100 | [diff] [blame] | 443 | (state->out_stream.last_seq + 1) - seq; |
| 444 | |
| 445 | /* Estimate number of packets that would have been sent */ |
| 446 | delta_seq = |
| 447 | (arrival_time - state->in_stream.last_arrival_time |
| 448 | + state->packet_duration/2) / |
| 449 | state->packet_duration; |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 450 | |
| 451 | adjust_rtp_timestamp_offset(endp, state, rtp_end, addr, |
| 452 | delta_seq, timestamp); |
| 453 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 454 | state->patch_ssrc = 1; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 455 | ssrc = state->orig_ssrc; |
Jacob Erlbeck | e2292f3 | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 456 | if (rtp_end->force_constant_ssrc != -1) |
| 457 | rtp_end->force_constant_ssrc -= 1; |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 458 | |
| 459 | LOGP(DMGCP, LOGL_NOTICE, |
| 460 | "SSRC patching enabled on 0x%x SSRC: %u " |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 461 | "SeqNo offset: %d, TS offset: %d " |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 462 | "from %s:%d in %d\n", |
| 463 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 464 | state->seq_offset, state->timestamp_offset, |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 465 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 466 | endp->conn_mode); |
| 467 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 468 | |
| 469 | state->in_stream.last_tsdelta = 0; |
| 470 | } else { |
| 471 | /* Compute current per-packet timestamp delta */ |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 472 | check_rtp_timestamp(endp, state, &state->in_stream, rtp_end, addr, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 473 | seq, timestamp, "input", |
| 474 | &state->in_stream.last_tsdelta); |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 475 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 476 | if (state->patch_ssrc) |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 477 | ssrc = state->orig_ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 478 | } |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 479 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 480 | /* Save before patching */ |
| 481 | state->in_stream.last_timestamp = timestamp; |
| 482 | state->in_stream.last_seq = seq; |
Jacob Erlbeck | eacc9b9 | 2014-01-30 21:01:35 +0100 | [diff] [blame] | 483 | state->in_stream.last_arrival_time = arrival_time; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 484 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 485 | if (rtp_end->force_aligned_timing && |
| 486 | state->out_stream.ssrc == ssrc && state->packet_duration) |
| 487 | /* Align the timestamp offset */ |
| 488 | align_rtp_timestamp_offset(endp, state, rtp_end, addr, timestamp); |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 489 | |
| 490 | /* Store the updated SSRC back to the packet */ |
| 491 | if (state->patch_ssrc) |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 492 | rtp_hdr->ssrc = htonl(ssrc); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 493 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 494 | /* Apply the offset and store it back to the packet. |
| 495 | * This won't change anything if the offset is 0, so the conditional is |
| 496 | * omitted. */ |
| 497 | seq += state->seq_offset; |
| 498 | rtp_hdr->sequence = htons(seq); |
| 499 | timestamp += state->timestamp_offset; |
| 500 | rtp_hdr->timestamp = htonl(timestamp); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 501 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 502 | /* Check again, whether the timestamps are still valid */ |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 503 | if (state->out_stream.ssrc == ssrc) |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 504 | check_rtp_timestamp(endp, state, &state->out_stream, rtp_end, |
| 505 | addr, seq, timestamp, "output", |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 506 | &state->out_stream.last_tsdelta); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 507 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 508 | /* |
| 509 | * The below takes the shape of the validation from Appendix A. Check |
| 510 | * if there is something weird with the sequence number, otherwise check |
| 511 | * for a wrap around in the sequence number. |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 512 | * |
| 513 | * Note that last_seq is used where the appendix mentions max_seq. |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 514 | */ |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 515 | udelta = seq - state->out_stream.last_seq; |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 516 | if (udelta < RTP_MAX_DROPOUT) { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 517 | if (seq < state->out_stream.last_seq) |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 518 | state->cycles += RTP_SEQ_MOD; |
Holger Hans Peter Freyther | 7e7ee5f | 2012-12-16 13:07:45 +0100 | [diff] [blame] | 519 | } else if (udelta <= RTP_SEQ_MOD - RTP_MAX_MISORDER) { |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 520 | LOGP(DMGCP, LOGL_NOTICE, |
| 521 | "RTP seqno made a very large jump on 0x%x delta: %u\n", |
| 522 | ENDPOINT_NUMBER(endp), udelta); |
| 523 | } |
| 524 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 525 | /* |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 526 | * Calculate the jitter between the two packages. The TS should be |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 527 | * taken closer to the read function. This was taken from the |
Jacob Erlbeck | 303b54a | 2014-01-30 21:01:34 +0100 | [diff] [blame] | 528 | * Appendix A of RFC 3550. Timestamp and arrival_time have a 1/rate |
| 529 | * resolution. |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 530 | */ |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 531 | d = transit - state->transit; |
| 532 | state->transit = transit; |
| 533 | if (d < 0) |
| 534 | d = -d; |
| 535 | state->jitter += d - ((state->jitter + 8) >> 4); |
| 536 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 537 | /* Save output values */ |
| 538 | state->out_stream.last_seq = seq; |
| 539 | state->out_stream.last_timestamp = timestamp; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 540 | state->out_stream.ssrc = ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 541 | |
Holger Hans Peter Freyther | 7279d24 | 2010-04-06 11:15:50 +0200 | [diff] [blame] | 542 | if (payload < 0) |
| 543 | return; |
| 544 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 545 | rtp_hdr->payload_type = payload; |
| 546 | } |
| 547 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 548 | /* |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 549 | * The below code is for dispatching. We have a dedicated port for |
| 550 | * 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] | 551 | */ |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 552 | static int forward_data(int fd, struct mgcp_rtp_tap *tap, const char *buf, int len) |
| 553 | { |
| 554 | if (!tap->enabled) |
| 555 | return 0; |
| 556 | |
| 557 | return sendto(fd, buf, len, 0, |
| 558 | (struct sockaddr *)&tap->forward, sizeof(tap->forward)); |
| 559 | } |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 560 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 561 | static int mgcp_send_transcoder(struct mgcp_rtp_end *end, |
| 562 | struct mgcp_config *cfg, int is_rtp, |
| 563 | const char *buf, int len) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 564 | { |
| 565 | int rc; |
| 566 | int port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 567 | struct sockaddr_in addr; |
| 568 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 569 | port = is_rtp ? end->rtp_port : end->rtcp_port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 570 | |
| 571 | addr.sin_family = AF_INET; |
| 572 | addr.sin_addr = cfg->transcoder_in; |
Holger Hans Peter Freyther | 5f2cd84 | 2010-11-01 21:53:39 +0100 | [diff] [blame] | 573 | addr.sin_port = port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 574 | |
| 575 | rc = sendto(is_rtp ? |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 576 | end->rtp.fd : |
| 577 | end->rtcp.fd, buf, len, 0, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 578 | (struct sockaddr *) &addr, sizeof(addr)); |
| 579 | |
| 580 | if (rc != len) |
| 581 | LOGP(DMGCP, LOGL_ERROR, |
| 582 | "Failed to send data to the transcoder: %s\n", |
| 583 | strerror(errno)); |
| 584 | |
| 585 | return rc; |
| 586 | } |
| 587 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 588 | int mgcp_send(struct mgcp_endpoint *endp, int dest, int is_rtp, |
| 589 | struct sockaddr_in *addr, char *buf, int rc) |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 590 | { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 591 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
Jacob Erlbeck | b830008 | 2013-12-19 10:00:34 +0100 | [diff] [blame] | 592 | struct mgcp_rtp_end *rtp_end; |
| 593 | struct mgcp_rtp_state *rtp_state; |
| 594 | int tap_idx; |
| 595 | |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 596 | /* For loop toggle the destination and then dispatch. */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 597 | if (tcfg->audio_loop) |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 598 | dest = !dest; |
| 599 | |
| 600 | /* Loop based on the conn_mode, maybe undoing the above */ |
| 601 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 602 | dest = !dest; |
| 603 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 604 | if (dest == MGCP_DEST_NET) { |
Jacob Erlbeck | b830008 | 2013-12-19 10:00:34 +0100 | [diff] [blame] | 605 | rtp_end = &endp->net_end; |
| 606 | rtp_state = &endp->bts_state; |
| 607 | tap_idx = MGCP_TAP_NET_OUT; |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 608 | } else { |
Jacob Erlbeck | b830008 | 2013-12-19 10:00:34 +0100 | [diff] [blame] | 609 | rtp_end = &endp->bts_end; |
| 610 | rtp_state = &endp->net_state; |
| 611 | tap_idx = MGCP_TAP_BTS_OUT; |
| 612 | } |
| 613 | |
Jacob Erlbeck | 0970bab | 2013-12-19 12:13:32 +0100 | [diff] [blame] | 614 | if (!rtp_end->output_enabled) |
| 615 | rtp_end->dropped_packets += 1; |
| 616 | else if (is_rtp) { |
Jacob Erlbeck | 42a833e | 2014-04-14 10:31:47 +0200 | [diff] [blame] | 617 | int cont; |
| 618 | int nbytes = 0; |
| 619 | int len = rc; |
| 620 | mgcp_patch_and_count(endp, rtp_state, rtp_end, addr, buf, len); |
| 621 | do { |
| 622 | cont = endp->cfg->rtp_processing_cb(endp, rtp_end, |
| 623 | buf, &len, RTP_BUF_SIZE); |
| 624 | if (cont < 0) |
| 625 | break; |
| 626 | |
| 627 | forward_data(rtp_end->rtp.fd, &endp->taps[tap_idx], |
| 628 | buf, len); |
| 629 | rc = mgcp_udp_send(rtp_end->rtp.fd, |
| 630 | &rtp_end->addr, |
| 631 | rtp_end->rtp_port, buf, len); |
| 632 | |
| 633 | if (rc <= 0) |
| 634 | return rc; |
| 635 | nbytes += rc; |
| 636 | len = cont; |
| 637 | } while (len > 0); |
| 638 | return nbytes; |
Jacob Erlbeck | b830008 | 2013-12-19 10:00:34 +0100 | [diff] [blame] | 639 | } else if (!tcfg->omit_rtcp) { |
| 640 | return mgcp_udp_send(rtp_end->rtcp.fd, |
| 641 | &rtp_end->addr, |
| 642 | rtp_end->rtcp_port, buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 643 | } |
Holger Hans Peter Freyther | 8c3d069 | 2012-09-11 12:31:25 +0200 | [diff] [blame] | 644 | |
| 645 | return 0; |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 646 | } |
| 647 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 648 | static int receive_from(struct mgcp_endpoint *endp, int fd, struct sockaddr_in *addr, |
| 649 | char *buf, int bufsize) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 650 | { |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 651 | int rc; |
| 652 | socklen_t slen = sizeof(*addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 653 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 654 | rc = recvfrom(fd, buf, bufsize, 0, |
| 655 | (struct sockaddr *) addr, &slen); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 656 | if (rc < 0) { |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 657 | LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x errno: %d/%s\n", |
| 658 | ENDPOINT_NUMBER(endp), errno, strerror(errno)); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 659 | return -1; |
| 660 | } |
| 661 | |
| 662 | /* 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] | 663 | if (!endp->allocated) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 664 | return -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 665 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 666 | #warning "Slight spec violation. With connection mode recvonly we should attempt to forward." |
| 667 | |
| 668 | return rc; |
| 669 | } |
| 670 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 671 | 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] | 672 | { |
Jacob Erlbeck | a0d64ce | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 673 | char buf[RTP_BUF_SIZE]; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 674 | struct sockaddr_in addr; |
| 675 | struct mgcp_endpoint *endp; |
| 676 | int rc, proto; |
| 677 | |
| 678 | endp = (struct mgcp_endpoint *) fd->data; |
| 679 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 680 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 681 | if (rc <= 0) |
| 682 | return -1; |
| 683 | |
| 684 | if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) { |
| 685 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | eedb453 | 2012-11-12 10:55:29 +0100 | [diff] [blame] | 686 | "Endpoint 0x%x data from wrong address %s vs. ", |
| 687 | ENDPOINT_NUMBER(endp), inet_ntoa(addr.sin_addr)); |
| 688 | LOGPC(DMGCP, LOGL_ERROR, |
| 689 | "%s\n", inet_ntoa(endp->net_end.addr)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 690 | return -1; |
| 691 | } |
| 692 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 693 | switch(endp->type) { |
| 694 | case MGCP_RTP_DEFAULT: |
| 695 | case MGCP_RTP_TRANSCODED: |
| 696 | if (endp->net_end.rtp_port != addr.sin_port && |
| 697 | endp->net_end.rtcp_port != addr.sin_port) { |
| 698 | LOGP(DMGCP, LOGL_ERROR, |
| 699 | "Data from wrong source port %d on 0x%x\n", |
| 700 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 701 | return -1; |
| 702 | } |
| 703 | break; |
| 704 | case MGCP_OSMUX_BSC: |
| 705 | case MGCP_OSMUX_BSC_NAT: |
| 706 | break; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 710 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 711 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from network on 0x%x\n", |
| 712 | ENDPOINT_NUMBER(endp)); |
| 713 | return 0; |
| 714 | } |
| 715 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 716 | 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] | 717 | endp->net_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 718 | endp->net_end.octets += rc; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 719 | |
| 720 | 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] | 721 | |
| 722 | switch (endp->type) { |
| 723 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 724 | return mgcp_send(endp, MGCP_DEST_BTS, proto == MGCP_PROTO_RTP, |
| 725 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 726 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 727 | return mgcp_send_transcoder(&endp->trans_net, endp->cfg, |
| 728 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 729 | case MGCP_OSMUX_BSC_NAT: |
| 730 | return osmux_xfrm_to_osmux(MGCP_DEST_BTS, buf, rc, endp); |
| 731 | case MGCP_OSMUX_BSC: /* Should not happen */ |
| 732 | break; |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 736 | endp->type, ENDPOINT_NUMBER(endp)); |
| 737 | return 0; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 738 | } |
| 739 | |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 740 | static void discover_bts(struct mgcp_endpoint *endp, int proto, struct sockaddr_in *addr) |
| 741 | { |
| 742 | struct mgcp_config *cfg = endp->cfg; |
| 743 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 744 | 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] | 745 | if (!cfg->bts_ip || |
| 746 | memcmp(&addr->sin_addr, |
| 747 | &cfg->bts_in, sizeof(cfg->bts_in)) == 0 || |
| 748 | memcmp(&addr->sin_addr, |
| 749 | &endp->bts_end.addr, sizeof(endp->bts_end.addr)) == 0) { |
| 750 | |
| 751 | endp->bts_end.rtp_port = addr->sin_port; |
| 752 | endp->bts_end.addr = addr->sin_addr; |
| 753 | |
| 754 | LOGP(DMGCP, LOGL_NOTICE, |
| 755 | "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n", |
| 756 | ENDPOINT_NUMBER(endp), ntohs(endp->bts_end.rtp_port), |
| 757 | ntohs(endp->bts_end.rtcp_port), inet_ntoa(addr->sin_addr)); |
| 758 | } |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 759 | } 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] | 760 | if (memcmp(&endp->bts_end.addr, &addr->sin_addr, |
| 761 | sizeof(endp->bts_end.addr)) == 0) { |
| 762 | endp->bts_end.rtcp_port = addr->sin_port; |
| 763 | } |
| 764 | } |
| 765 | } |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 766 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 767 | 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] | 768 | { |
Jacob Erlbeck | a0d64ce | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 769 | char buf[RTP_BUF_SIZE]; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 770 | struct sockaddr_in addr; |
| 771 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 772 | int rc, proto; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 773 | |
| 774 | endp = (struct mgcp_endpoint *) fd->data; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 775 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 776 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 777 | if (rc <= 0) |
| 778 | return -1; |
| 779 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 780 | 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] | 781 | |
| 782 | /* 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] | 783 | /* it was the BTS... */ |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 784 | discover_bts(endp, proto, &addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 785 | |
Holger Hans Peter Freyther | ea97fbf | 2010-08-05 10:53:26 +0000 | [diff] [blame] | 786 | if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) { |
| 787 | LOGP(DMGCP, LOGL_ERROR, |
| 788 | "Data from wrong bts %s on 0x%x\n", |
| 789 | inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); |
| 790 | return -1; |
| 791 | } |
| 792 | |
| 793 | if (endp->bts_end.rtp_port != addr.sin_port && |
| 794 | endp->bts_end.rtcp_port != addr.sin_port) { |
| 795 | LOGP(DMGCP, LOGL_ERROR, |
| 796 | "Data from wrong bts source port %d on 0x%x\n", |
| 797 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 798 | return -1; |
| 799 | } |
| 800 | |
Holger Hans Peter Freyther | b3c206a | 2010-05-14 02:18:59 +0800 | [diff] [blame] | 801 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 802 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 803 | 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] | 804 | ENDPOINT_NUMBER(endp)); |
| 805 | return 0; |
| 806 | } |
| 807 | |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 808 | /* do this before the loop handling */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 809 | endp->bts_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 810 | endp->bts_end.octets += rc; |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 811 | |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 812 | 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] | 813 | |
| 814 | switch (endp->type) { |
| 815 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 816 | return mgcp_send(endp, MGCP_DEST_NET, proto == MGCP_PROTO_RTP, |
| 817 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 818 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 819 | return mgcp_send_transcoder(&endp->trans_bts, endp->cfg, |
| 820 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 821 | case MGCP_OSMUX_BSC: |
| 822 | /* OSMUX translation: BTS -> BSC */ |
| 823 | return osmux_xfrm_to_osmux(MGCP_DEST_NET, buf, rc, endp); |
| 824 | case MGCP_OSMUX_BSC_NAT: |
| 825 | break; /* Should not happen */ |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 829 | endp->type, ENDPOINT_NUMBER(endp)); |
| 830 | return 0; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 831 | } |
| 832 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 833 | 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] | 834 | int dest, struct osmo_fd *fd) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 835 | { |
Jacob Erlbeck | a0d64ce | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 836 | char buf[RTP_BUF_SIZE]; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 837 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 838 | struct mgcp_config *cfg; |
| 839 | int rc, proto; |
| 840 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 841 | cfg = _endp->cfg; |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 842 | rc = receive_from(_endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 843 | if (rc <= 0) |
| 844 | return -1; |
| 845 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 846 | proto = fd == &end->rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 847 | |
| 848 | if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) { |
| 849 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 850 | "Data not coming from transcoder dest: %d %s on 0x%x\n", |
| 851 | dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 852 | return -1; |
| 853 | } |
| 854 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 855 | if (end->rtp_port != addr.sin_port && |
| 856 | end->rtcp_port != addr.sin_port) { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 857 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 858 | "Data from wrong transcoder dest %d source port %d on 0x%x\n", |
| 859 | dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 860 | return -1; |
| 861 | } |
| 862 | |
| 863 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 864 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 865 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n", |
| 866 | dest, ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 867 | return 0; |
| 868 | } |
| 869 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 870 | end->packets += 1; |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 871 | 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] | 872 | } |
| 873 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 874 | 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] | 875 | { |
| 876 | struct mgcp_endpoint *endp; |
| 877 | endp = (struct mgcp_endpoint *) fd->data; |
| 878 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 879 | 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] | 880 | } |
| 881 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 882 | 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] | 883 | { |
| 884 | struct mgcp_endpoint *endp; |
| 885 | endp = (struct mgcp_endpoint *) fd->data; |
| 886 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 887 | 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] | 888 | } |
| 889 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 890 | int mgcp_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] | 891 | { |
| 892 | struct sockaddr_in addr; |
| 893 | int on = 1; |
| 894 | |
| 895 | fd->fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 896 | if (fd->fd < 0) { |
| 897 | LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n"); |
| 898 | return -1; |
| 899 | } |
| 900 | |
| 901 | setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 902 | memset(&addr, 0, sizeof(addr)); |
| 903 | addr.sin_family = AF_INET; |
| 904 | addr.sin_port = htons(port); |
| 905 | inet_aton(source_addr, &addr.sin_addr); |
| 906 | |
| 907 | if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 6f36e92 | 2010-08-06 03:00:17 +0800 | [diff] [blame] | 908 | close(fd->fd); |
| 909 | fd->fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 910 | return -1; |
| 911 | } |
| 912 | |
| 913 | return 0; |
| 914 | } |
| 915 | |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 916 | static int set_ip_tos(int fd, int tos) |
| 917 | { |
| 918 | int ret; |
| 919 | ret = setsockopt(fd, IPPROTO_IP, IP_TOS, |
| 920 | &tos, sizeof(tos)); |
| 921 | return ret != 0; |
| 922 | } |
| 923 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 924 | 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] | 925 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 926 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtp, |
| 927 | rtp_end->local_port) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 928 | 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] | 929 | cfg->source_addr, rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 930 | goto cleanup0; |
| 931 | } |
| 932 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 933 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtcp, |
| 934 | rtp_end->local_port + 1) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 935 | 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] | 936 | cfg->source_addr, rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 937 | goto cleanup1; |
| 938 | } |
| 939 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 940 | set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp); |
| 941 | set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp); |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 942 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 943 | rtp_end->rtp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 944 | if (osmo_fd_register(&rtp_end->rtp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 945 | 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] | 946 | rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 947 | goto cleanup2; |
| 948 | } |
| 949 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 950 | rtp_end->rtcp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 951 | if (osmo_fd_register(&rtp_end->rtcp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 952 | 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] | 953 | rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 954 | goto cleanup3; |
| 955 | } |
| 956 | |
| 957 | return 0; |
| 958 | |
| 959 | cleanup3: |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 960 | osmo_fd_unregister(&rtp_end->rtp); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 961 | cleanup2: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 962 | close(rtp_end->rtcp.fd); |
| 963 | rtp_end->rtcp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 964 | cleanup1: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 965 | close(rtp_end->rtp.fd); |
| 966 | rtp_end->rtp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 967 | cleanup0: |
| 968 | return -1; |
| 969 | } |
| 970 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 971 | static int int_bind(const char *port, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 972 | 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] | 973 | struct mgcp_endpoint *_endp, int rtp_port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 974 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 975 | if (end->rtp.fd != -1 || end->rtcp.fd != -1) { |
| 976 | LOGP(DMGCP, LOGL_ERROR, "Previous %s was still bound on %d\n", |
| 977 | port, ENDPOINT_NUMBER(_endp)); |
| 978 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 7fe2a3d | 2010-08-06 07:18:22 +0800 | [diff] [blame] | 979 | } |
| 980 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 981 | end->local_port = rtp_port; |
| 982 | end->rtp.cb = cb; |
| 983 | end->rtp.data = _endp; |
| 984 | end->rtcp.data = _endp; |
| 985 | end->rtcp.cb = cb; |
| 986 | return bind_rtp(_endp->cfg, end, ENDPOINT_NUMBER(_endp)); |
| 987 | } |
| 988 | |
| 989 | |
| 990 | int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 991 | { |
| 992 | return int_bind("bts-port", &endp->bts_end, |
| 993 | rtp_data_bts, endp, rtp_port); |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 994 | } |
| 995 | |
| 996 | int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 997 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 998 | return int_bind("net-port", &endp->net_end, |
| 999 | rtp_data_net, endp, rtp_port); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 1000 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1001 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1002 | 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] | 1003 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 1004 | return int_bind("trans-net", &endp->trans_net, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 1005 | rtp_data_trans_net, endp, rtp_port); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 1006 | } |
| 1007 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1008 | int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 1009 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 1010 | return int_bind("trans-bts", &endp->trans_bts, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 1011 | rtp_data_trans_bts, endp, rtp_port); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1012 | } |
| 1013 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1014 | int mgcp_free_rtp_port(struct mgcp_rtp_end *end) |
| 1015 | { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1016 | if (end->rtp.fd != -1) { |
| 1017 | close(end->rtp.fd); |
| 1018 | end->rtp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 1019 | osmo_fd_unregister(&end->rtp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | if (end->rtcp.fd != -1) { |
| 1023 | close(end->rtcp.fd); |
| 1024 | end->rtcp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 1025 | osmo_fd_unregister(&end->rtcp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | return 0; |
| 1029 | } |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1030 | |
| 1031 | |
| 1032 | void mgcp_state_calc_loss(struct mgcp_rtp_state *state, |
| 1033 | struct mgcp_rtp_end *end, uint32_t *expected, |
| 1034 | int *loss) |
| 1035 | { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1036 | *expected = state->cycles + state->out_stream.last_seq; |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1037 | *expected = *expected - state->base_seq + 1; |
| 1038 | |
| 1039 | if (!state->initialized) { |
| 1040 | *expected = 0; |
| 1041 | *loss = 0; |
| 1042 | return; |
| 1043 | } |
| 1044 | |
| 1045 | /* |
| 1046 | * Make sure the sign is correct and use the biggest |
| 1047 | * positive/negative number that fits. |
| 1048 | */ |
| 1049 | *loss = *expected - end->packets; |
| 1050 | if (*expected < end->packets) { |
| 1051 | if (*loss > 0) |
| 1052 | *loss = INT_MIN; |
| 1053 | } else { |
| 1054 | if (*loss < 0) |
| 1055 | *loss = INT_MAX; |
| 1056 | } |
| 1057 | } |
Holger Hans Peter Freyther | cb306a6 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1058 | |
| 1059 | uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *state) |
| 1060 | { |
| 1061 | if (!state->initialized) |
| 1062 | return 0; |
| 1063 | return state->jitter >> 4; |
| 1064 | } |