Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia/rtcp.h> |
| 21 | #include <pjmedia/errno.h> |
| 22 | #include <pj/assert.h> |
| 23 | #include <pj/log.h> |
| 24 | #include <pj/os.h> |
| 25 | #include <pj/sock.h> |
| 26 | #include <pj/string.h> |
| 27 | |
| 28 | #define THIS_FILE "rtcp.c" |
| 29 | |
| 30 | #define RTCP_SR 200 |
| 31 | #define RTCP_RR 201 |
| 32 | #define RTCP_SDES 202 |
| 33 | #define RTCP_BYE 203 |
| 34 | #define RTCP_XR 207 |
| 35 | |
| 36 | enum { |
| 37 | RTCP_SDES_NULL = 0, |
| 38 | RTCP_SDES_CNAME = 1, |
| 39 | RTCP_SDES_NAME = 2, |
| 40 | RTCP_SDES_EMAIL = 3, |
| 41 | RTCP_SDES_PHONE = 4, |
| 42 | RTCP_SDES_LOC = 5, |
| 43 | RTCP_SDES_TOOL = 6, |
| 44 | RTCP_SDES_NOTE = 7 |
| 45 | }; |
| 46 | |
| 47 | #if PJ_HAS_HIGH_RES_TIMER==0 |
| 48 | # error "High resolution timer needs to be enabled" |
| 49 | #endif |
| 50 | |
| 51 | |
| 52 | |
| 53 | #if 0 |
| 54 | # define TRACE_(x) PJ_LOG(3,x) |
| 55 | #else |
| 56 | # define TRACE_(x) ; |
| 57 | #endif |
| 58 | |
| 59 | |
| 60 | /* |
| 61 | * Get NTP time. |
| 62 | */ |
| 63 | PJ_DEF(pj_status_t) pjmedia_rtcp_get_ntp_time(const pjmedia_rtcp_session *sess, |
| 64 | pjmedia_rtcp_ntp_rec *ntp) |
| 65 | { |
| 66 | /* Seconds between 1900-01-01 to 1970-01-01 */ |
| 67 | #define JAN_1970 (2208988800UL) |
| 68 | pj_timestamp ts; |
| 69 | pj_status_t status; |
| 70 | |
| 71 | status = pj_get_timestamp(&ts); |
| 72 | |
| 73 | /* Fill up the high 32bit part */ |
| 74 | ntp->hi = (pj_uint32_t)((ts.u64 - sess->ts_base.u64) / sess->ts_freq.u64) |
| 75 | + sess->tv_base.sec + JAN_1970; |
| 76 | |
| 77 | /* Calculate seconds fractions */ |
| 78 | ts.u64 = (ts.u64 - sess->ts_base.u64) % sess->ts_freq.u64; |
| 79 | pj_assert(ts.u64 < sess->ts_freq.u64); |
| 80 | ts.u64 = (ts.u64 << 32) / sess->ts_freq.u64; |
| 81 | |
| 82 | /* Fill up the low 32bit part */ |
| 83 | ntp->lo = ts.u32.lo; |
| 84 | |
| 85 | |
| 86 | #if (defined(PJ_WIN32) && PJ_WIN32!=0) || \ |
| 87 | (defined(PJ_WIN64) && PJ_WIN64!=0) || \ |
| 88 | (defined(PJ_WIN32_WINCE) && PJ_WIN32_WINCE!=0) |
| 89 | |
| 90 | /* On Win32, since we use QueryPerformanceCounter() as the backend |
| 91 | * timestamp API, we need to protect against this bug: |
| 92 | * Performance counter value may unexpectedly leap forward |
| 93 | * http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q274323 |
| 94 | */ |
| 95 | { |
| 96 | /* |
| 97 | * Compare elapsed time reported by timestamp with actual elapsed |
| 98 | * time. If the difference is too excessive, then we use system |
| 99 | * time instead. |
| 100 | */ |
| 101 | |
| 102 | /* MIN_DIFF needs to be large enough so that "normal" diff caused |
| 103 | * by system activity or context switch doesn't trigger the time |
| 104 | * correction. |
| 105 | */ |
| 106 | enum { MIN_DIFF = 400 }; |
| 107 | |
| 108 | pj_time_val ts_time, elapsed, diff; |
| 109 | |
| 110 | pj_gettimeofday(&elapsed); |
| 111 | |
| 112 | ts_time.sec = ntp->hi - sess->tv_base.sec - JAN_1970; |
| 113 | ts_time.msec = (long)(ntp->lo * 1000.0 / 0xFFFFFFFF); |
| 114 | |
| 115 | PJ_TIME_VAL_SUB(elapsed, sess->tv_base); |
| 116 | |
| 117 | if (PJ_TIME_VAL_LT(ts_time, elapsed)) { |
| 118 | diff = elapsed; |
| 119 | PJ_TIME_VAL_SUB(diff, ts_time); |
| 120 | } else { |
| 121 | diff = ts_time; |
| 122 | PJ_TIME_VAL_SUB(diff, elapsed); |
| 123 | } |
| 124 | |
| 125 | if (PJ_TIME_VAL_MSEC(diff) >= MIN_DIFF) { |
| 126 | |
| 127 | TRACE_((sess->name, "RTCP NTP timestamp corrected by %d ms", |
| 128 | PJ_TIME_VAL_MSEC(diff))); |
| 129 | |
| 130 | |
| 131 | ntp->hi = elapsed.sec + sess->tv_base.sec + JAN_1970; |
| 132 | ntp->lo = (elapsed.msec * 65536 / 1000) << 16; |
| 133 | } |
| 134 | |
| 135 | } |
| 136 | #endif |
| 137 | |
| 138 | return status; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | /* |
| 143 | * Initialize RTCP session setting. |
| 144 | */ |
| 145 | PJ_DEF(void) pjmedia_rtcp_session_setting_default( |
| 146 | pjmedia_rtcp_session_setting *settings) |
| 147 | { |
| 148 | pj_bzero(settings, sizeof(*settings)); |
| 149 | } |
| 150 | |
| 151 | |
| 152 | /* |
| 153 | * Initialize bidirectional RTCP statistics. |
| 154 | * |
| 155 | */ |
| 156 | PJ_DEF(void) pjmedia_rtcp_init_stat(pjmedia_rtcp_stat *stat) |
| 157 | { |
| 158 | pj_time_val now; |
| 159 | |
| 160 | pj_assert(stat); |
| 161 | |
| 162 | pj_bzero(stat, sizeof(pjmedia_rtcp_stat)); |
| 163 | |
| 164 | pj_math_stat_init(&stat->rtt); |
| 165 | pj_math_stat_init(&stat->rx.loss_period); |
| 166 | pj_math_stat_init(&stat->rx.jitter); |
| 167 | pj_math_stat_init(&stat->tx.loss_period); |
| 168 | pj_math_stat_init(&stat->tx.jitter); |
| 169 | |
| 170 | #if defined(PJMEDIA_RTCP_STAT_HAS_IPDV) && PJMEDIA_RTCP_STAT_HAS_IPDV!=0 |
| 171 | pj_math_stat_init(&stat->rx_ipdv); |
| 172 | #endif |
| 173 | |
| 174 | #if defined(PJMEDIA_RTCP_STAT_HAS_RAW_JITTER) && PJMEDIA_RTCP_STAT_HAS_RAW_JITTER!=0 |
| 175 | pj_math_stat_init(&stat->rx_raw_jitter); |
| 176 | #endif |
| 177 | |
| 178 | pj_gettimeofday(&now); |
| 179 | stat->start = now; |
| 180 | } |
| 181 | |
| 182 | |
| 183 | /* |
| 184 | * Initialize RTCP session. |
| 185 | */ |
| 186 | PJ_DEF(void) pjmedia_rtcp_init(pjmedia_rtcp_session *sess, |
| 187 | char *name, |
| 188 | unsigned clock_rate, |
| 189 | unsigned samples_per_frame, |
| 190 | pj_uint32_t ssrc) |
| 191 | { |
| 192 | pjmedia_rtcp_session_setting settings; |
| 193 | |
| 194 | pjmedia_rtcp_session_setting_default(&settings); |
| 195 | settings.name = name; |
| 196 | settings.clock_rate = clock_rate; |
| 197 | settings.samples_per_frame = samples_per_frame; |
| 198 | settings.ssrc = ssrc; |
| 199 | |
| 200 | pjmedia_rtcp_init2(sess, &settings); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /* |
| 205 | * Initialize RTCP session. |
| 206 | */ |
| 207 | PJ_DEF(void) pjmedia_rtcp_init2( pjmedia_rtcp_session *sess, |
| 208 | const pjmedia_rtcp_session_setting *settings) |
| 209 | { |
| 210 | pjmedia_rtcp_sr_pkt *sr_pkt = &sess->rtcp_sr_pkt; |
| 211 | pj_time_val now; |
| 212 | |
| 213 | /* Memset everything */ |
| 214 | pj_bzero(sess, sizeof(pjmedia_rtcp_session)); |
| 215 | |
| 216 | /* Last RX timestamp in RTP packet */ |
| 217 | sess->rtp_last_ts = (unsigned)-1; |
| 218 | |
| 219 | /* Name */ |
| 220 | sess->name = settings->name ? settings->name : (char*)THIS_FILE; |
| 221 | |
| 222 | /* Set clock rate */ |
| 223 | sess->clock_rate = settings->clock_rate; |
| 224 | sess->pkt_size = settings->samples_per_frame; |
| 225 | |
| 226 | /* Init common RTCP SR header */ |
| 227 | sr_pkt->common.version = 2; |
| 228 | sr_pkt->common.count = 1; |
| 229 | sr_pkt->common.pt = RTCP_SR; |
| 230 | sr_pkt->common.length = pj_htons(12); |
| 231 | sr_pkt->common.ssrc = pj_htonl(settings->ssrc); |
| 232 | |
| 233 | /* Copy to RTCP RR header */ |
| 234 | pj_memcpy(&sess->rtcp_rr_pkt.common, &sr_pkt->common, |
| 235 | sizeof(pjmedia_rtcp_common)); |
| 236 | sess->rtcp_rr_pkt.common.pt = RTCP_RR; |
| 237 | sess->rtcp_rr_pkt.common.length = pj_htons(7); |
| 238 | |
| 239 | /* Get time and timestamp base and frequency */ |
| 240 | pj_gettimeofday(&now); |
| 241 | sess->tv_base = now; |
| 242 | pj_get_timestamp(&sess->ts_base); |
| 243 | pj_get_timestamp_freq(&sess->ts_freq); |
| 244 | sess->rtp_ts_base = settings->rtp_ts_base; |
| 245 | |
| 246 | /* Initialize statistics states */ |
| 247 | pjmedia_rtcp_init_stat(&sess->stat); |
| 248 | |
| 249 | /* RR will be initialized on receipt of the first RTP packet. */ |
| 250 | } |
| 251 | |
| 252 | |
| 253 | PJ_DEF(void) pjmedia_rtcp_fini(pjmedia_rtcp_session *sess) |
| 254 | { |
| 255 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 256 | pjmedia_rtcp_xr_fini(&sess->xr_session); |
| 257 | #else |
| 258 | /* Nothing to do. */ |
| 259 | PJ_UNUSED_ARG(sess); |
| 260 | #endif |
| 261 | } |
| 262 | |
| 263 | static void rtcp_init_seq(pjmedia_rtcp_session *sess) |
| 264 | { |
| 265 | sess->received = 0; |
| 266 | sess->exp_prior = 0; |
| 267 | sess->rx_prior = 0; |
| 268 | sess->transit = 0; |
| 269 | sess->jitter = 0; |
| 270 | } |
| 271 | |
| 272 | PJ_DEF(void) pjmedia_rtcp_rx_rtp( pjmedia_rtcp_session *sess, |
| 273 | unsigned seq, |
| 274 | unsigned rtp_ts, |
| 275 | unsigned payload) |
| 276 | { |
| 277 | pjmedia_rtcp_rx_rtp2(sess, seq, rtp_ts, payload, PJ_FALSE); |
| 278 | } |
| 279 | |
| 280 | PJ_DEF(void) pjmedia_rtcp_rx_rtp2(pjmedia_rtcp_session *sess, |
| 281 | unsigned seq, |
| 282 | unsigned rtp_ts, |
| 283 | unsigned payload, |
| 284 | pj_bool_t discarded) |
| 285 | { |
| 286 | pj_timestamp ts; |
| 287 | pj_uint32_t arrival; |
| 288 | pj_int32_t transit; |
| 289 | pjmedia_rtp_status seq_st; |
| 290 | unsigned last_seq; |
| 291 | |
| 292 | #if !defined(PJMEDIA_HAS_RTCP_XR) || (PJMEDIA_HAS_RTCP_XR == 0) |
| 293 | PJ_UNUSED_ARG(discarded); |
| 294 | #endif |
| 295 | |
| 296 | if (sess->stat.rx.pkt == 0) { |
| 297 | /* Init sequence for the first time. */ |
| 298 | pjmedia_rtp_seq_init(&sess->seq_ctrl, (pj_uint16_t)seq); |
| 299 | } |
| 300 | |
| 301 | sess->stat.rx.pkt++; |
| 302 | sess->stat.rx.bytes += payload; |
| 303 | |
| 304 | /* Process the RTP packet. */ |
| 305 | last_seq = sess->seq_ctrl.max_seq; |
| 306 | pjmedia_rtp_seq_update(&sess->seq_ctrl, (pj_uint16_t)seq, &seq_st); |
| 307 | |
| 308 | if (seq_st.status.flag.restart) { |
| 309 | rtcp_init_seq(sess); |
| 310 | } |
| 311 | |
| 312 | if (seq_st.status.flag.dup) { |
| 313 | sess->stat.rx.dup++; |
| 314 | TRACE_((sess->name, "Duplicate packet detected")); |
| 315 | } |
| 316 | |
| 317 | if (seq_st.status.flag.outorder && !seq_st.status.flag.probation) { |
| 318 | sess->stat.rx.reorder++; |
| 319 | TRACE_((sess->name, "Out-of-order packet detected")); |
| 320 | } |
| 321 | |
| 322 | if (seq_st.status.flag.bad) { |
| 323 | sess->stat.rx.discard++; |
| 324 | |
| 325 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 326 | pjmedia_rtcp_xr_rx_rtp(&sess->xr_session, seq, |
| 327 | -1, /* lost */ |
| 328 | (seq_st.status.flag.dup? 1:0), /* dup */ |
| 329 | (!seq_st.status.flag.dup? 1:-1), /* discard */ |
| 330 | -1, /* jitter */ |
| 331 | -1, 0); /* toh */ |
| 332 | #endif |
| 333 | |
| 334 | TRACE_((sess->name, "Bad packet discarded")); |
| 335 | return; |
| 336 | } |
| 337 | |
| 338 | /* Only mark "good" packets */ |
| 339 | ++sess->received; |
| 340 | |
| 341 | /* Calculate loss periods. */ |
| 342 | if (seq_st.diff > 1) { |
| 343 | unsigned count = seq_st.diff - 1; |
| 344 | unsigned period; |
| 345 | |
| 346 | period = count * sess->pkt_size * 1000 / sess->clock_rate; |
| 347 | period *= 1000; |
| 348 | |
| 349 | /* Update packet lost. |
| 350 | * The packet lost number will also be updated when we're sending |
| 351 | * outbound RTCP RR. |
| 352 | */ |
| 353 | sess->stat.rx.loss += (seq_st.diff - 1); |
| 354 | TRACE_((sess->name, "%d packet(s) lost", seq_st.diff - 1)); |
| 355 | |
| 356 | /* Update loss period stat */ |
| 357 | pj_math_stat_update(&sess->stat.rx.loss_period, period); |
| 358 | } |
| 359 | |
| 360 | |
| 361 | /* |
| 362 | * Calculate jitter only when sequence is good (see RFC 3550 section A.8), |
| 363 | * AND only when the timestamp is different than the last packet |
| 364 | * (see RTP FAQ). |
| 365 | */ |
| 366 | if (seq_st.diff == 1 && rtp_ts != sess->rtp_last_ts) { |
| 367 | /* Get arrival time and convert timestamp to samples */ |
| 368 | pj_get_timestamp(&ts); |
| 369 | ts.u64 = ts.u64 * sess->clock_rate / sess->ts_freq.u64; |
| 370 | arrival = ts.u32.lo; |
| 371 | |
| 372 | transit = arrival - rtp_ts; |
| 373 | |
| 374 | /* Ignore the first N packets as they normally have bad jitter |
| 375 | * due to other threads working to establish the call |
| 376 | */ |
| 377 | if (sess->transit == 0 || |
| 378 | sess->received < PJMEDIA_RTCP_IGNORE_FIRST_PACKETS) |
| 379 | { |
| 380 | sess->transit = transit; |
| 381 | sess->stat.rx.jitter.min = (unsigned)-1; |
| 382 | } else { |
| 383 | pj_int32_t d; |
| 384 | pj_uint32_t jitter; |
| 385 | |
| 386 | d = transit - sess->transit; |
| 387 | if (d < 0) |
| 388 | d = -d; |
| 389 | |
| 390 | sess->jitter += d - ((sess->jitter + 8) >> 4); |
| 391 | |
| 392 | /* Update jitter stat */ |
| 393 | jitter = sess->jitter >> 4; |
| 394 | |
| 395 | /* Convert jitter unit from samples to usec */ |
| 396 | if (jitter < 4294) |
| 397 | jitter = jitter * 1000000 / sess->clock_rate; |
| 398 | else { |
| 399 | jitter = jitter * 1000 / sess->clock_rate; |
| 400 | jitter *= 1000; |
| 401 | } |
| 402 | pj_math_stat_update(&sess->stat.rx.jitter, jitter); |
| 403 | |
| 404 | |
| 405 | #if defined(PJMEDIA_RTCP_STAT_HAS_RAW_JITTER) && PJMEDIA_RTCP_STAT_HAS_RAW_JITTER!=0 |
| 406 | { |
| 407 | pj_uint32_t raw_jitter; |
| 408 | |
| 409 | /* Convert raw jitter unit from samples to usec */ |
| 410 | if (d < 4294) |
| 411 | raw_jitter = d * 1000000 / sess->clock_rate; |
| 412 | else { |
| 413 | raw_jitter = d * 1000 / sess->clock_rate; |
| 414 | raw_jitter *= 1000; |
| 415 | } |
| 416 | |
| 417 | /* Update jitter stat */ |
| 418 | pj_math_stat_update(&sess->stat.rx_raw_jitter, raw_jitter); |
| 419 | } |
| 420 | #endif |
| 421 | |
| 422 | |
| 423 | #if defined(PJMEDIA_RTCP_STAT_HAS_IPDV) && PJMEDIA_RTCP_STAT_HAS_IPDV!=0 |
| 424 | { |
| 425 | pj_int32_t ipdv; |
| 426 | |
| 427 | ipdv = transit - sess->transit; |
| 428 | /* Convert IPDV unit from samples to usec */ |
| 429 | if (ipdv > -2147 && ipdv < 2147) |
| 430 | ipdv = ipdv * 1000000 / (int)sess->clock_rate; |
| 431 | else { |
| 432 | ipdv = ipdv * 1000 / (int)sess->clock_rate; |
| 433 | ipdv *= 1000; |
| 434 | } |
| 435 | |
| 436 | /* Update jitter stat */ |
| 437 | pj_math_stat_update(&sess->stat.rx_ipdv, ipdv); |
| 438 | } |
| 439 | #endif |
| 440 | |
| 441 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 442 | pjmedia_rtcp_xr_rx_rtp(&sess->xr_session, seq, |
| 443 | 0, /* lost */ |
| 444 | 0, /* dup */ |
| 445 | discarded, /* discard */ |
| 446 | (sess->jitter >> 4), /* jitter */ |
| 447 | -1, 0); /* toh */ |
| 448 | #endif |
| 449 | |
| 450 | /* Update session transit */ |
| 451 | sess->transit = transit; |
| 452 | } |
| 453 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 454 | } else if (seq_st.diff > 1) { |
| 455 | int i; |
| 456 | |
| 457 | /* Report RTCP XR about packet losses */ |
| 458 | for (i=seq_st.diff-1; i>0; --i) { |
| 459 | pjmedia_rtcp_xr_rx_rtp(&sess->xr_session, seq - i, |
| 460 | 1, /* lost */ |
| 461 | 0, /* dup */ |
| 462 | 0, /* discard */ |
| 463 | -1, /* jitter */ |
| 464 | -1, 0); /* toh */ |
| 465 | } |
| 466 | |
| 467 | /* Report RTCP XR this packet */ |
| 468 | pjmedia_rtcp_xr_rx_rtp(&sess->xr_session, seq, |
| 469 | 0, /* lost */ |
| 470 | 0, /* dup */ |
| 471 | discarded, /* discard */ |
| 472 | -1, /* jitter */ |
| 473 | -1, 0); /* toh */ |
| 474 | #endif |
| 475 | } |
| 476 | |
| 477 | /* Update timestamp of last RX RTP packet */ |
| 478 | sess->rtp_last_ts = rtp_ts; |
| 479 | } |
| 480 | |
| 481 | PJ_DEF(void) pjmedia_rtcp_tx_rtp(pjmedia_rtcp_session *sess, |
| 482 | unsigned bytes_payload_size) |
| 483 | { |
| 484 | /* Update statistics */ |
| 485 | sess->stat.tx.pkt++; |
| 486 | sess->stat.tx.bytes += bytes_payload_size; |
| 487 | } |
| 488 | |
| 489 | |
| 490 | static void parse_rtcp_report( pjmedia_rtcp_session *sess, |
| 491 | const void *pkt, |
| 492 | pj_size_t size) |
| 493 | { |
| 494 | pjmedia_rtcp_common *common = (pjmedia_rtcp_common*) pkt; |
| 495 | const pjmedia_rtcp_rr *rr = NULL; |
| 496 | const pjmedia_rtcp_sr *sr = NULL; |
| 497 | pj_uint32_t last_loss, jitter_samp, jitter; |
| 498 | |
| 499 | /* Parse RTCP */ |
| 500 | if (common->pt == RTCP_SR) { |
| 501 | sr = (pjmedia_rtcp_sr*) (((char*)pkt) + sizeof(pjmedia_rtcp_common)); |
| 502 | if (common->count > 0 && size >= (sizeof(pjmedia_rtcp_sr_pkt))) { |
| 503 | rr = (pjmedia_rtcp_rr*)(((char*)pkt) + (sizeof(pjmedia_rtcp_common) |
| 504 | + sizeof(pjmedia_rtcp_sr))); |
| 505 | } |
| 506 | } else if (common->pt == RTCP_RR && common->count > 0) { |
| 507 | rr = (pjmedia_rtcp_rr*)(((char*)pkt) + sizeof(pjmedia_rtcp_common)); |
| 508 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 509 | } else if (common->pt == RTCP_XR) { |
| 510 | if (sess->xr_enabled) |
| 511 | pjmedia_rtcp_xr_rx_rtcp_xr(&sess->xr_session, pkt, size); |
| 512 | |
| 513 | return; |
| 514 | #endif |
| 515 | } |
| 516 | |
| 517 | |
| 518 | if (sr) { |
| 519 | /* Save LSR from NTP timestamp of RTCP packet */ |
| 520 | sess->rx_lsr = ((pj_ntohl(sr->ntp_sec) & 0x0000FFFF) << 16) | |
| 521 | ((pj_ntohl(sr->ntp_frac) >> 16) & 0xFFFF); |
| 522 | |
| 523 | /* Calculate SR arrival time for DLSR */ |
| 524 | pj_get_timestamp(&sess->rx_lsr_time); |
| 525 | |
| 526 | TRACE_((sess->name, "Rx RTCP SR: ntp_ts=%p", |
| 527 | sess->rx_lsr, |
| 528 | (pj_uint32_t)(sess->rx_lsr_time.u64*65536/sess->ts_freq.u64))); |
| 529 | } |
| 530 | |
| 531 | |
| 532 | /* Nothing more to do if there's no RR packet */ |
| 533 | if (rr == NULL) |
| 534 | return; |
| 535 | |
| 536 | |
| 537 | last_loss = sess->stat.tx.loss; |
| 538 | |
| 539 | /* Get packet loss */ |
| 540 | sess->stat.tx.loss = (rr->total_lost_2 << 16) + |
| 541 | (rr->total_lost_1 << 8) + |
| 542 | rr->total_lost_0; |
| 543 | |
| 544 | TRACE_((sess->name, "Rx RTCP RR: total_lost_2=%x, 1=%x, 0=%x, lost=%d", |
| 545 | (int)rr->total_lost_2, |
| 546 | (int)rr->total_lost_1, |
| 547 | (int)rr->total_lost_0, |
| 548 | sess->stat.tx.loss)); |
| 549 | |
| 550 | /* We can't calculate the exact loss period for TX, so just give the |
| 551 | * best estimation. |
| 552 | */ |
| 553 | if (sess->stat.tx.loss > last_loss) { |
| 554 | unsigned period; |
| 555 | |
| 556 | /* Loss period in msec */ |
| 557 | period = (sess->stat.tx.loss - last_loss) * sess->pkt_size * |
| 558 | 1000 / sess->clock_rate; |
| 559 | |
| 560 | /* Loss period in usec */ |
| 561 | period *= 1000; |
| 562 | |
| 563 | /* Update loss period stat */ |
| 564 | pj_math_stat_update(&sess->stat.tx.loss_period, period); |
| 565 | } |
| 566 | |
| 567 | /* Get jitter value in usec */ |
| 568 | jitter_samp = pj_ntohl(rr->jitter); |
| 569 | /* Calculate jitter in usec, avoiding overflows */ |
| 570 | if (jitter_samp <= 4294) |
| 571 | jitter = jitter_samp * 1000000 / sess->clock_rate; |
| 572 | else { |
| 573 | jitter = jitter_samp * 1000 / sess->clock_rate; |
| 574 | jitter *= 1000; |
| 575 | } |
| 576 | |
| 577 | /* Update jitter statistics */ |
| 578 | pj_math_stat_update(&sess->stat.tx.jitter, jitter); |
| 579 | |
| 580 | /* Can only calculate if LSR and DLSR is present in RR */ |
| 581 | if (rr->lsr && rr->dlsr) { |
| 582 | pj_uint32_t lsr, now, dlsr; |
| 583 | pj_uint64_t eedelay; |
| 584 | pjmedia_rtcp_ntp_rec ntp; |
| 585 | |
| 586 | /* LSR is the middle 32bit of NTP. It has 1/65536 second |
| 587 | * resolution |
| 588 | */ |
| 589 | lsr = pj_ntohl(rr->lsr); |
| 590 | |
| 591 | /* DLSR is delay since LSR, also in 1/65536 resolution */ |
| 592 | dlsr = pj_ntohl(rr->dlsr); |
| 593 | |
| 594 | /* Get current time, and convert to 1/65536 resolution */ |
| 595 | pjmedia_rtcp_get_ntp_time(sess, &ntp); |
| 596 | now = ((ntp.hi & 0xFFFF) << 16) + (ntp.lo >> 16); |
| 597 | |
| 598 | /* End-to-end delay is (now-lsr-dlsr) */ |
| 599 | eedelay = now - lsr - dlsr; |
| 600 | |
| 601 | /* Convert end to end delay to usec (keeping the calculation in |
| 602 | * 64bit space):: |
| 603 | * sess->ee_delay = (eedelay * 1000) / 65536; |
| 604 | */ |
| 605 | if (eedelay < 4294) { |
| 606 | eedelay = (eedelay * 1000000) >> 16; |
| 607 | } else { |
| 608 | eedelay = (eedelay * 1000) >> 16; |
| 609 | eedelay *= 1000; |
| 610 | } |
| 611 | |
| 612 | TRACE_((sess->name, "Rx RTCP RR: lsr=%p, dlsr=%p (%d:%03dms), " |
| 613 | "now=%p, rtt=%p", |
| 614 | lsr, dlsr, dlsr/65536, (dlsr%65536)*1000/65536, |
| 615 | now, (pj_uint32_t)eedelay)); |
| 616 | |
| 617 | /* Only save calculation if "now" is greater than lsr, or |
| 618 | * otherwise rtt will be invalid |
| 619 | */ |
| 620 | if (now-dlsr >= lsr) { |
| 621 | unsigned rtt = (pj_uint32_t)eedelay; |
| 622 | |
| 623 | /* Check that eedelay value really makes sense. |
| 624 | * We allow up to 30 seconds RTT! |
| 625 | */ |
| 626 | if (eedelay > 30 * 1000 * 1000UL) { |
| 627 | |
| 628 | TRACE_((sess->name, "RTT not making any sense, ignored..")); |
| 629 | goto end_rtt_calc; |
| 630 | } |
| 631 | |
| 632 | #if defined(PJMEDIA_RTCP_NORMALIZE_FACTOR) && PJMEDIA_RTCP_NORMALIZE_FACTOR!=0 |
| 633 | /* "Normalize" rtt value that is exceptionally high. For such |
| 634 | * values, "normalize" the rtt to be PJMEDIA_RTCP_NORMALIZE_FACTOR |
| 635 | * times the average value. |
| 636 | */ |
| 637 | if (rtt > ((unsigned)sess->stat.rtt.mean * |
| 638 | PJMEDIA_RTCP_NORMALIZE_FACTOR) && sess->stat.rtt.n!=0) |
| 639 | { |
| 640 | unsigned orig_rtt = rtt; |
| 641 | rtt = sess->stat.rtt.mean * PJMEDIA_RTCP_NORMALIZE_FACTOR; |
| 642 | PJ_LOG(5,(sess->name, |
| 643 | "RTT value %d usec is normalized to %d usec", |
| 644 | orig_rtt, rtt)); |
| 645 | } |
| 646 | #endif |
| 647 | TRACE_((sess->name, "RTCP RTT is set to %d usec", rtt)); |
| 648 | |
| 649 | /* Update RTT stat */ |
| 650 | pj_math_stat_update(&sess->stat.rtt, rtt); |
| 651 | |
| 652 | } else { |
| 653 | PJ_LOG(5, (sess->name, "Internal RTCP NTP clock skew detected: " |
| 654 | "lsr=%p, now=%p, dlsr=%p (%d:%03dms), " |
| 655 | "diff=%d", |
| 656 | lsr, now, dlsr, dlsr/65536, |
| 657 | (dlsr%65536)*1000/65536, |
| 658 | dlsr-(now-lsr))); |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | end_rtt_calc: |
| 663 | |
| 664 | pj_gettimeofday(&sess->stat.tx.update); |
| 665 | sess->stat.tx.update_cnt++; |
| 666 | } |
| 667 | |
| 668 | |
| 669 | static void parse_rtcp_sdes(pjmedia_rtcp_session *sess, |
| 670 | const void *pkt, |
| 671 | pj_size_t size) |
| 672 | { |
| 673 | pjmedia_rtcp_sdes *sdes = &sess->stat.peer_sdes; |
| 674 | char *p, *p_end; |
| 675 | char *b, *b_end; |
| 676 | |
| 677 | p = (char*)pkt + 8; |
| 678 | p_end = (char*)pkt + size; |
| 679 | |
| 680 | pj_bzero(sdes, sizeof(*sdes)); |
| 681 | b = sess->stat.peer_sdes_buf_; |
| 682 | b_end = b + sizeof(sess->stat.peer_sdes_buf_); |
| 683 | |
| 684 | while (p < p_end) { |
| 685 | pj_uint8_t sdes_type, sdes_len; |
| 686 | pj_str_t sdes_value = {NULL, 0}; |
| 687 | |
| 688 | sdes_type = *p++; |
| 689 | |
| 690 | /* Check for end of SDES item list */ |
| 691 | if (sdes_type == RTCP_SDES_NULL || p == p_end) |
| 692 | break; |
| 693 | |
| 694 | sdes_len = *p++; |
| 695 | |
| 696 | /* Check for corrupted SDES packet */ |
| 697 | if (p + sdes_len > p_end) |
| 698 | break; |
| 699 | |
| 700 | /* Get SDES item */ |
| 701 | if (b + sdes_len < b_end) { |
| 702 | pj_memcpy(b, p, sdes_len); |
| 703 | sdes_value.ptr = b; |
| 704 | sdes_value.slen = sdes_len; |
| 705 | b += sdes_len; |
| 706 | } else { |
| 707 | /* Insufficient SDES buffer */ |
| 708 | PJ_LOG(5, (sess->name, |
| 709 | "Unsufficient buffer to save RTCP SDES type %d:%.*s", |
| 710 | sdes_type, sdes_len, p)); |
| 711 | p += sdes_len; |
| 712 | continue; |
| 713 | } |
| 714 | |
| 715 | switch (sdes_type) { |
| 716 | case RTCP_SDES_CNAME: |
| 717 | sdes->cname = sdes_value; |
| 718 | break; |
| 719 | case RTCP_SDES_NAME: |
| 720 | sdes->name = sdes_value; |
| 721 | break; |
| 722 | case RTCP_SDES_EMAIL: |
| 723 | sdes->email = sdes_value; |
| 724 | break; |
| 725 | case RTCP_SDES_PHONE: |
| 726 | sdes->phone = sdes_value; |
| 727 | break; |
| 728 | case RTCP_SDES_LOC: |
| 729 | sdes->loc = sdes_value; |
| 730 | break; |
| 731 | case RTCP_SDES_TOOL: |
| 732 | sdes->tool = sdes_value; |
| 733 | break; |
| 734 | case RTCP_SDES_NOTE: |
| 735 | sdes->note = sdes_value; |
| 736 | break; |
| 737 | default: |
| 738 | TRACE_((sess->name, "Received unknown RTCP SDES type %d:%.*s", |
| 739 | sdes_type, sdes_value.slen, sdes_value.ptr)); |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | p += sdes_len; |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | |
| 748 | static void parse_rtcp_bye(pjmedia_rtcp_session *sess, |
| 749 | const void *pkt, |
| 750 | pj_size_t size) |
| 751 | { |
| 752 | pj_str_t reason = {"-", 1}; |
| 753 | |
| 754 | /* Check and get BYE reason */ |
| 755 | if (size > 8) { |
| 756 | reason.slen = PJ_MIN(sizeof(sess->stat.peer_sdes_buf_), |
| 757 | *((pj_uint8_t*)pkt+8)); |
| 758 | pj_memcpy(sess->stat.peer_sdes_buf_, ((pj_uint8_t*)pkt+9), |
| 759 | reason.slen); |
| 760 | reason.ptr = sess->stat.peer_sdes_buf_; |
| 761 | } |
| 762 | |
| 763 | /* Just print RTCP BYE log */ |
| 764 | PJ_LOG(5, (sess->name, "Received RTCP BYE, reason: %.*s", |
| 765 | reason.slen, reason.ptr)); |
| 766 | } |
| 767 | |
| 768 | |
| 769 | PJ_DEF(void) pjmedia_rtcp_rx_rtcp( pjmedia_rtcp_session *sess, |
| 770 | const void *pkt, |
| 771 | pj_size_t size) |
| 772 | { |
| 773 | pj_uint8_t *p, *p_end; |
| 774 | |
| 775 | p = (pj_uint8_t*)pkt; |
| 776 | p_end = p + size; |
| 777 | while (p < p_end) { |
| 778 | pjmedia_rtcp_common *common = (pjmedia_rtcp_common*)p; |
| 779 | unsigned len; |
| 780 | |
| 781 | len = (pj_ntohs((pj_uint16_t)common->length)+1) * 4; |
| 782 | switch(common->pt) { |
| 783 | case RTCP_SR: |
| 784 | case RTCP_RR: |
| 785 | case RTCP_XR: |
| 786 | parse_rtcp_report(sess, p, len); |
| 787 | break; |
| 788 | case RTCP_SDES: |
| 789 | parse_rtcp_sdes(sess, p, len); |
| 790 | break; |
| 791 | case RTCP_BYE: |
| 792 | parse_rtcp_bye(sess, p, len); |
| 793 | break; |
| 794 | default: |
| 795 | /* Ignore unknown RTCP */ |
| 796 | TRACE_((sess->name, "Received unknown RTCP packet type=%d", |
| 797 | common->pt)); |
| 798 | break; |
| 799 | } |
| 800 | |
| 801 | p += len; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | |
| 806 | PJ_DEF(void) pjmedia_rtcp_build_rtcp(pjmedia_rtcp_session *sess, |
| 807 | void **ret_p_pkt, int *len) |
| 808 | { |
| 809 | pj_uint32_t expected, expected_interval, received_interval, lost_interval; |
| 810 | pjmedia_rtcp_common *common; |
| 811 | pjmedia_rtcp_sr *sr; |
| 812 | pjmedia_rtcp_rr *rr; |
| 813 | pj_timestamp ts_now; |
| 814 | pjmedia_rtcp_ntp_rec ntp; |
| 815 | |
| 816 | /* Get current NTP time. */ |
| 817 | pj_get_timestamp(&ts_now); |
| 818 | pjmedia_rtcp_get_ntp_time(sess, &ntp); |
| 819 | |
| 820 | |
| 821 | /* See if we have transmitted RTP packets since last time we |
| 822 | * sent RTCP SR. |
| 823 | */ |
| 824 | if (sess->stat.tx.pkt != pj_ntohl(sess->rtcp_sr_pkt.sr.sender_pcount)) { |
| 825 | pj_time_val ts_time; |
| 826 | pj_uint32_t rtp_ts; |
| 827 | |
| 828 | /* So we should send RTCP SR */ |
| 829 | *ret_p_pkt = (void*) &sess->rtcp_sr_pkt; |
| 830 | *len = sizeof(pjmedia_rtcp_sr_pkt); |
| 831 | common = &sess->rtcp_sr_pkt.common; |
| 832 | rr = &sess->rtcp_sr_pkt.rr; |
| 833 | sr = &sess->rtcp_sr_pkt.sr; |
| 834 | |
| 835 | /* Update packet count */ |
| 836 | sr->sender_pcount = pj_htonl(sess->stat.tx.pkt); |
| 837 | |
| 838 | /* Update octets count */ |
| 839 | sr->sender_bcount = pj_htonl(sess->stat.tx.bytes); |
| 840 | |
| 841 | /* Fill in NTP timestamp in SR. */ |
| 842 | sr->ntp_sec = pj_htonl(ntp.hi); |
| 843 | sr->ntp_frac = pj_htonl(ntp.lo); |
| 844 | |
| 845 | /* Fill in RTP timestamp (corresponds to NTP timestamp) in SR. */ |
| 846 | ts_time.sec = ntp.hi - sess->tv_base.sec - JAN_1970; |
| 847 | ts_time.msec = (long)(ntp.lo * 1000.0 / 0xFFFFFFFF); |
| 848 | rtp_ts = sess->rtp_ts_base + |
| 849 | (pj_uint32_t)(sess->clock_rate*ts_time.sec) + |
| 850 | (pj_uint32_t)(sess->clock_rate*ts_time.msec/1000); |
| 851 | sr->rtp_ts = pj_htonl(rtp_ts); |
| 852 | |
| 853 | TRACE_((sess->name, "TX RTCP SR: ntp_ts=%p", |
| 854 | ((ntp.hi & 0xFFFF) << 16) + ((ntp.lo & 0xFFFF0000) |
| 855 | >> 16))); |
| 856 | |
| 857 | |
| 858 | } else { |
| 859 | /* We should send RTCP RR then */ |
| 860 | *ret_p_pkt = (void*) &sess->rtcp_rr_pkt; |
| 861 | *len = sizeof(pjmedia_rtcp_rr_pkt); |
| 862 | common = &sess->rtcp_rr_pkt.common; |
| 863 | rr = &sess->rtcp_rr_pkt.rr; |
| 864 | sr = NULL; |
| 865 | } |
| 866 | |
| 867 | /* SSRC and last_seq */ |
| 868 | rr->ssrc = pj_htonl(sess->peer_ssrc); |
| 869 | rr->last_seq = (sess->seq_ctrl.cycles & 0xFFFF0000L); |
| 870 | /* Since this is an "+=" operation, make sure we update last_seq on |
| 871 | * both RR and SR. |
| 872 | */ |
| 873 | sess->rtcp_sr_pkt.rr.last_seq += sess->seq_ctrl.max_seq; |
| 874 | sess->rtcp_rr_pkt.rr.last_seq += sess->seq_ctrl.max_seq; |
| 875 | rr->last_seq = pj_htonl(rr->last_seq); |
| 876 | |
| 877 | |
| 878 | /* Jitter */ |
| 879 | rr->jitter = pj_htonl(sess->jitter >> 4); |
| 880 | |
| 881 | |
| 882 | /* Total lost. */ |
| 883 | expected = pj_ntohl(rr->last_seq) - sess->seq_ctrl.base_seq; |
| 884 | |
| 885 | /* This is bug: total lost already calculated on each incoming RTP! |
| 886 | if (expected >= sess->received) |
| 887 | sess->stat.rx.loss = expected - sess->received; |
| 888 | else |
| 889 | sess->stat.rx.loss = 0; |
| 890 | */ |
| 891 | |
| 892 | rr->total_lost_2 = (sess->stat.rx.loss >> 16) & 0xFF; |
| 893 | rr->total_lost_1 = (sess->stat.rx.loss >> 8) & 0xFF; |
| 894 | rr->total_lost_0 = (sess->stat.rx.loss & 0xFF); |
| 895 | |
| 896 | /* Fraction lost calculation */ |
| 897 | expected_interval = expected - sess->exp_prior; |
| 898 | sess->exp_prior = expected; |
| 899 | |
| 900 | received_interval = sess->received - sess->rx_prior; |
| 901 | sess->rx_prior = sess->received; |
| 902 | |
| 903 | if (expected_interval >= received_interval) |
| 904 | lost_interval = expected_interval - received_interval; |
| 905 | else |
| 906 | lost_interval = 0; |
| 907 | |
| 908 | if (expected_interval==0 || lost_interval == 0) { |
| 909 | rr->fract_lost = 0; |
| 910 | } else { |
| 911 | rr->fract_lost = (lost_interval << 8) / expected_interval; |
| 912 | } |
| 913 | |
| 914 | if (sess->rx_lsr_time.u64 == 0 || sess->rx_lsr == 0) { |
| 915 | rr->lsr = 0; |
| 916 | rr->dlsr = 0; |
| 917 | } else { |
| 918 | pj_timestamp ts; |
| 919 | pj_uint32_t lsr = sess->rx_lsr; |
| 920 | pj_uint64_t lsr_time = sess->rx_lsr_time.u64; |
| 921 | pj_uint32_t dlsr; |
| 922 | |
| 923 | /* Convert LSR time to 1/65536 seconds resolution */ |
| 924 | lsr_time = (lsr_time << 16) / sess->ts_freq.u64; |
| 925 | |
| 926 | /* Fill in LSR. |
| 927 | LSR is the middle 32bit of the last SR NTP time received. |
| 928 | */ |
| 929 | rr->lsr = pj_htonl(lsr); |
| 930 | |
| 931 | /* Fill in DLSR. |
| 932 | DLSR is Delay since Last SR, in 1/65536 seconds. |
| 933 | */ |
| 934 | ts.u64 = ts_now.u64; |
| 935 | |
| 936 | /* Convert interval to 1/65536 seconds value */ |
| 937 | ts.u64 = (ts.u64 << 16) / sess->ts_freq.u64; |
| 938 | |
| 939 | /* Get DLSR */ |
| 940 | dlsr = (pj_uint32_t)(ts.u64 - lsr_time); |
| 941 | rr->dlsr = pj_htonl(dlsr); |
| 942 | |
| 943 | TRACE_((sess->name,"Tx RTCP RR: lsr=%p, lsr_time=%p, now=%p, dlsr=%p" |
| 944 | "(%ds:%03dms)", |
| 945 | lsr, |
| 946 | (pj_uint32_t)lsr_time, |
| 947 | (pj_uint32_t)ts.u64, |
| 948 | dlsr, |
| 949 | dlsr/65536, |
| 950 | (dlsr%65536)*1000/65536 )); |
| 951 | } |
| 952 | |
| 953 | /* Update counter */ |
| 954 | pj_gettimeofday(&sess->stat.rx.update); |
| 955 | sess->stat.rx.update_cnt++; |
| 956 | } |
| 957 | |
| 958 | |
| 959 | PJ_DEF(pj_status_t) pjmedia_rtcp_build_rtcp_sdes( |
| 960 | pjmedia_rtcp_session *session, |
| 961 | void *buf, |
| 962 | pj_size_t *length, |
| 963 | const pjmedia_rtcp_sdes *sdes) |
| 964 | { |
| 965 | pjmedia_rtcp_common *hdr; |
| 966 | pj_uint8_t *p; |
| 967 | pj_size_t len; |
| 968 | |
| 969 | PJ_ASSERT_RETURN(session && buf && length && sdes, PJ_EINVAL); |
| 970 | |
| 971 | /* Verify SDES item length */ |
| 972 | if (sdes->cname.slen > 255 || sdes->name.slen > 255 || |
| 973 | sdes->email.slen > 255 || sdes->phone.slen > 255 || |
| 974 | sdes->loc.slen > 255 || sdes->tool.slen > 255 || |
| 975 | sdes->note.slen > 255) |
| 976 | { |
| 977 | return PJ_EINVAL; |
| 978 | } |
| 979 | |
| 980 | /* Verify buffer length */ |
| 981 | len = sizeof(*hdr); |
| 982 | if (sdes->cname.slen) len += sdes->cname.slen + 2; |
| 983 | if (sdes->name.slen) len += sdes->name.slen + 2; |
| 984 | if (sdes->email.slen) len += sdes->email.slen + 2; |
| 985 | if (sdes->phone.slen) len += sdes->phone.slen + 2; |
| 986 | if (sdes->loc.slen) len += sdes->loc.slen + 2; |
| 987 | if (sdes->tool.slen) len += sdes->tool.slen + 2; |
| 988 | if (sdes->note.slen) len += sdes->note.slen + 2; |
| 989 | len++; /* null termination */ |
| 990 | len = ((len+3)/4) * 4; |
| 991 | if (len > *length) |
| 992 | return PJ_ETOOSMALL; |
| 993 | |
| 994 | /* Build RTCP SDES header */ |
| 995 | hdr = (pjmedia_rtcp_common*)buf; |
| 996 | pj_memcpy(hdr, &session->rtcp_sr_pkt.common, sizeof(*hdr)); |
| 997 | hdr->pt = RTCP_SDES; |
| 998 | hdr->length = pj_htons((pj_uint16_t)(len/4 - 1)); |
| 999 | |
| 1000 | /* Build RTCP SDES items */ |
| 1001 | p = (pj_uint8_t*)hdr + sizeof(*hdr); |
| 1002 | #define BUILD_SDES_ITEM(SDES_NAME, SDES_TYPE) \ |
| 1003 | if (sdes->SDES_NAME.slen) { \ |
| 1004 | *p++ = SDES_TYPE; \ |
| 1005 | *p++ = (pj_uint8_t)sdes->SDES_NAME.slen; \ |
| 1006 | pj_memcpy(p, sdes->SDES_NAME.ptr, sdes->SDES_NAME.slen); \ |
| 1007 | p += sdes->SDES_NAME.slen; \ |
| 1008 | } |
| 1009 | BUILD_SDES_ITEM(cname, RTCP_SDES_CNAME); |
| 1010 | BUILD_SDES_ITEM(name, RTCP_SDES_NAME); |
| 1011 | BUILD_SDES_ITEM(email, RTCP_SDES_EMAIL); |
| 1012 | BUILD_SDES_ITEM(phone, RTCP_SDES_PHONE); |
| 1013 | BUILD_SDES_ITEM(loc, RTCP_SDES_LOC); |
| 1014 | BUILD_SDES_ITEM(tool, RTCP_SDES_TOOL); |
| 1015 | BUILD_SDES_ITEM(note, RTCP_SDES_NOTE); |
| 1016 | #undef BUILD_SDES_ITEM |
| 1017 | |
| 1018 | /* Null termination */ |
| 1019 | *p++ = 0; |
| 1020 | |
| 1021 | /* Pad to 32bit */ |
| 1022 | while ((p-(pj_uint8_t*)buf) % 4) |
| 1023 | *p++ = 0; |
| 1024 | |
| 1025 | /* Finally */ |
| 1026 | pj_assert((int)len == p-(pj_uint8_t*)buf); |
| 1027 | *length = len; |
| 1028 | |
| 1029 | return PJ_SUCCESS; |
| 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | PJ_DEF(pj_status_t) pjmedia_rtcp_build_rtcp_bye(pjmedia_rtcp_session *session, |
| 1034 | void *buf, |
| 1035 | pj_size_t *length, |
| 1036 | const pj_str_t *reason) |
| 1037 | { |
| 1038 | pjmedia_rtcp_common *hdr; |
| 1039 | pj_uint8_t *p; |
| 1040 | pj_size_t len; |
| 1041 | |
| 1042 | PJ_ASSERT_RETURN(session && buf && length, PJ_EINVAL); |
| 1043 | |
| 1044 | /* Verify BYE reason length */ |
| 1045 | if (reason && reason->slen > 255) |
| 1046 | return PJ_EINVAL; |
| 1047 | |
| 1048 | /* Verify buffer length */ |
| 1049 | len = sizeof(*hdr); |
| 1050 | if (reason && reason->slen) len += reason->slen + 1; |
| 1051 | len = ((len+3)/4) * 4; |
| 1052 | if (len > *length) |
| 1053 | return PJ_ETOOSMALL; |
| 1054 | |
| 1055 | /* Build RTCP BYE header */ |
| 1056 | hdr = (pjmedia_rtcp_common*)buf; |
| 1057 | pj_memcpy(hdr, &session->rtcp_sr_pkt.common, sizeof(*hdr)); |
| 1058 | hdr->pt = RTCP_BYE; |
| 1059 | hdr->length = pj_htons((pj_uint16_t)(len/4 - 1)); |
| 1060 | |
| 1061 | /* Write RTCP BYE reason */ |
| 1062 | p = (pj_uint8_t*)hdr + sizeof(*hdr); |
| 1063 | if (reason && reason->slen) { |
| 1064 | *p++ = (pj_uint8_t)reason->slen; |
| 1065 | pj_memcpy(p, reason->ptr, reason->slen); |
| 1066 | p += reason->slen; |
| 1067 | } |
| 1068 | |
| 1069 | /* Pad to 32bit */ |
| 1070 | while ((p-(pj_uint8_t*)buf) % 4) |
| 1071 | *p++ = 0; |
| 1072 | |
| 1073 | pj_assert((int)len == p-(pj_uint8_t*)buf); |
| 1074 | *length = len; |
| 1075 | |
| 1076 | return PJ_SUCCESS; |
| 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | PJ_DEF(pj_status_t) pjmedia_rtcp_enable_xr( pjmedia_rtcp_session *sess, |
| 1081 | pj_bool_t enable) |
| 1082 | { |
| 1083 | #if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0) |
| 1084 | |
| 1085 | /* Check if request won't change anything */ |
| 1086 | if (!(enable ^ sess->xr_enabled)) |
| 1087 | return PJ_SUCCESS; |
| 1088 | |
| 1089 | if (!enable) { |
| 1090 | sess->xr_enabled = PJ_FALSE; |
| 1091 | return PJ_SUCCESS; |
| 1092 | } |
| 1093 | |
| 1094 | pjmedia_rtcp_xr_init(&sess->xr_session, sess, 0, 1); |
| 1095 | sess->xr_enabled = PJ_TRUE; |
| 1096 | |
| 1097 | return PJ_SUCCESS; |
| 1098 | |
| 1099 | #else |
| 1100 | |
| 1101 | PJ_UNUSED_ARG(sess); |
| 1102 | PJ_UNUSED_ARG(enable); |
| 1103 | return PJ_ENOTSUP; |
| 1104 | |
| 1105 | #endif |
| 1106 | } |