2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * Haivision Open SRT (Secure Reliable Transport) protocol
26 #include "libavutil/avassert.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/parseutils.h"
29 #include "libavutil/time.h"
34 #include "os_support.h"
37 /* This is for MPEG-TS and it's a default SRTO_PAYLOADSIZE for SRTT_LIVE (8 TS packets) */
38 #ifndef SRT_LIVE_DEFAULT_PAYLOAD_SIZE
39 #define SRT_LIVE_DEFAULT_PAYLOAD_SIZE 1316
42 /* This is the maximum payload size for Live mode, should you have a different payload type than MPEG-TS */
43 #ifndef SRT_LIVE_MAX_PAYLOAD_SIZE
44 #define SRT_LIVE_MAX_PAYLOAD_SIZE 1456
49 SRT_MODE_LISTENER = 1,
50 SRT_MODE_RENDEZVOUS = 2
53 typedef struct SRTContext {
58 int64_t listen_timeout;
65 #if SRT_VERSION_VALUE >= 0x010302
66 int enforced_encryption;
79 int64_t connect_timeout;
91 SRT_TRANSTYPE transtype;
95 #define D AV_OPT_FLAG_DECODING_PARAM
96 #define E AV_OPT_FLAG_ENCODING_PARAM
97 #define OFFSET(x) offsetof(SRTContext, x)
98 static const AVOption libsrt_options[] = {
99 { "rw_timeout", "Timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
100 { "listen_timeout", "Connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
101 { "send_buffer_size", "Socket send buffer size (in bytes)", OFFSET(send_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
102 { "recv_buffer_size", "Socket receive buffer size (in bytes)", OFFSET(recv_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
103 { "pkt_size", "Maximum SRT packet size", OFFSET(payload_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, SRT_LIVE_MAX_PAYLOAD_SIZE, .flags = D|E, "payload_size" },
104 { "payload_size", "Maximum SRT packet size", OFFSET(payload_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, SRT_LIVE_MAX_PAYLOAD_SIZE, .flags = D|E, "payload_size" },
105 { "ts_size", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_LIVE_DEFAULT_PAYLOAD_SIZE }, INT_MIN, INT_MAX, .flags = D|E, "payload_size" },
106 { "max_size", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_LIVE_MAX_PAYLOAD_SIZE }, INT_MIN, INT_MAX, .flags = D|E, "payload_size" },
107 { "maxbw", "Maximum bandwidth (bytes per second) that the connection can use", OFFSET(maxbw), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
108 { "pbkeylen", "Crypto key len in bytes {16,24,32} Default: 16 (128-bit)", OFFSET(pbkeylen), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 32, .flags = D|E },
109 { "passphrase", "Crypto PBKDF2 Passphrase size[0,10..64] 0:disable crypto", OFFSET(passphrase), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
110 #if SRT_VERSION_VALUE >= 0x010302
111 { "enforced_encryption", "Enforces that both connection parties have the same passphrase set", OFFSET(enforced_encryption), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
112 { "kmrefreshrate", "The number of packets to be transmitted after which the encryption key is switched to a new key", OFFSET(kmrefreshrate), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
113 { "kmpreannounce", "The interval between when a new encryption key is sent and when switchover occurs", OFFSET(kmpreannounce), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
115 { "mss", "The Maximum Segment Size", OFFSET(mss), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1500, .flags = D|E },
116 { "ffs", "Flight flag size (window size) (in bytes)", OFFSET(ffs), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
117 { "ipttl", "IP Time To Live", OFFSET(ipttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, .flags = D|E },
118 { "iptos", "IP Type of Service", OFFSET(iptos), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, .flags = D|E },
119 { "inputbw", "Estimated input stream rate", OFFSET(inputbw), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
120 { "oheadbw", "MaxBW ceiling based on % over input stream rate", OFFSET(oheadbw), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 100, .flags = D|E },
121 { "latency", "receiver delay to absorb bursts of missed packet retransmissions", OFFSET(latency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
122 { "tsbpddelay", "deprecated, same effect as latency option", OFFSET(latency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
123 { "rcvlatency", "receive latency", OFFSET(rcvlatency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
124 { "peerlatency", "peer latency", OFFSET(peerlatency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
125 { "tlpktdrop", "Enable receiver pkt drop", OFFSET(tlpktdrop), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
126 { "nakreport", "Enable receiver to send periodic NAK reports", OFFSET(nakreport), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
127 { "connect_timeout", "Connect timeout. Caller default: 3000, rendezvous (x 10)", OFFSET(connect_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
128 { "mode", "Connection mode (caller, listener, rendezvous)", OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = SRT_MODE_CALLER }, SRT_MODE_CALLER, SRT_MODE_RENDEZVOUS, .flags = D|E, "mode" },
129 { "caller", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_CALLER }, INT_MIN, INT_MAX, .flags = D|E, "mode" },
130 { "listener", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_LISTENER }, INT_MIN, INT_MAX, .flags = D|E, "mode" },
131 { "rendezvous", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_RENDEZVOUS }, INT_MIN, INT_MAX, .flags = D|E, "mode" },
132 { "sndbuf", "Send buffer size (in bytes)", OFFSET(sndbuf), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
133 { "rcvbuf", "Receive buffer size (in bytes)", OFFSET(rcvbuf), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
134 { "lossmaxttl", "Maximum possible packet reorder tolerance", OFFSET(lossmaxttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
135 { "minversion", "The minimum SRT version that is required from the peer", OFFSET(minversion), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
136 { "streamid", "A string of up to 512 characters that an Initiator can pass to a Responder", OFFSET(streamid), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
137 { "smoother", "The type of Smoother used for the transmission for that socket", OFFSET(smoother), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
138 { "messageapi", "Enable message API", OFFSET(messageapi), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
139 { "transtype", "The transmission type for the socket", OFFSET(transtype), AV_OPT_TYPE_INT, { .i64 = SRTT_INVALID }, SRTT_LIVE, SRTT_INVALID, .flags = D|E, "transtype" },
140 { "live", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRTT_LIVE }, INT_MIN, INT_MAX, .flags = D|E, "transtype" },
141 { "file", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRTT_FILE }, INT_MIN, INT_MAX, .flags = D|E, "transtype" },
142 { "linger", "Number of seconds that the socket waits for unsent data when closing", OFFSET(linger), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
146 static int libsrt_neterrno(URLContext *h)
148 int err = srt_getlasterror(NULL);
149 av_log(h, AV_LOG_ERROR, "%s\n", srt_getlasterror_str());
150 if (err == SRT_EASYNCRCV)
151 return AVERROR(EAGAIN);
152 return AVERROR_UNKNOWN;
155 static int libsrt_socket_nonblock(int socket, int enable)
157 int ret, blocking = enable ? 0 : 1;
158 /* Setting SRTO_{SND,RCV}SYN options to 1 enable blocking mode, setting them to 0 enable non-blocking mode. */
159 ret = srt_setsockopt(socket, 0, SRTO_SNDSYN, &blocking, sizeof(blocking));
162 return srt_setsockopt(socket, 0, SRTO_RCVSYN, &blocking, sizeof(blocking));
165 static int libsrt_network_wait_fd(URLContext *h, int eid, int fd, int write)
168 int modes = write ? SRT_EPOLL_OUT : SRT_EPOLL_IN;
171 if (srt_epoll_add_usock(eid, fd, &modes) < 0)
172 return libsrt_neterrno(h);
174 ret = srt_epoll_wait(eid, 0, 0, ready, &len, POLLING_TIME, 0, 0, 0, 0);
176 ret = srt_epoll_wait(eid, ready, &len, 0, 0, POLLING_TIME, 0, 0, 0, 0);
179 if (srt_getlasterror(NULL) == SRT_ETIMEOUT)
180 ret = AVERROR(EAGAIN);
182 ret = libsrt_neterrno(h);
186 if (srt_epoll_remove_usock(eid, fd) < 0)
187 return libsrt_neterrno(h);
191 /* TODO de-duplicate code from ff_network_wait_fd_timeout() */
193 static int libsrt_network_wait_fd_timeout(URLContext *h, int eid, int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb)
196 int64_t wait_start = 0;
199 if (ff_check_interrupt(int_cb))
201 ret = libsrt_network_wait_fd(h, eid, fd, write);
202 if (ret != AVERROR(EAGAIN))
206 wait_start = av_gettime_relative();
207 else if (av_gettime_relative() - wait_start > timeout)
208 return AVERROR(ETIMEDOUT);
213 static int libsrt_listen(int eid, int fd, const struct sockaddr *addr, socklen_t addrlen, URLContext *h, int timeout)
217 if (srt_setsockopt(fd, SOL_SOCKET, SRTO_REUSEADDR, &reuse, sizeof(reuse))) {
218 av_log(h, AV_LOG_WARNING, "setsockopt(SRTO_REUSEADDR) failed\n");
220 ret = srt_bind(fd, addr, addrlen);
222 return libsrt_neterrno(h);
224 ret = srt_listen(fd, 1);
226 return libsrt_neterrno(h);
228 while ((ret = libsrt_network_wait_fd_timeout(h, eid, fd, 1, timeout, &h->interrupt_callback))) {
230 case AVERROR(ETIMEDOUT):
237 ret = srt_accept(fd, NULL, NULL);
239 return libsrt_neterrno(h);
240 if (libsrt_socket_nonblock(ret, 1) < 0)
241 av_log(h, AV_LOG_DEBUG, "libsrt_socket_nonblock failed\n");
246 static int libsrt_listen_connect(int eid, int fd, const struct sockaddr *addr, socklen_t addrlen, int timeout, URLContext *h, int will_try_next)
250 if (libsrt_socket_nonblock(fd, 1) < 0)
251 av_log(h, AV_LOG_DEBUG, "ff_socket_nonblock failed\n");
253 while ((ret = srt_connect(fd, addr, addrlen))) {
254 ret = libsrt_neterrno(h);
257 if (ff_check_interrupt(&h->interrupt_callback))
260 case AVERROR(EINPROGRESS):
261 case AVERROR(EAGAIN):
262 ret = libsrt_network_wait_fd_timeout(h, eid, fd, 1, timeout, &h->interrupt_callback);
265 ret = srt_getlasterror(NULL);
266 srt_clearlasterror();
270 av_strerror(ret, buf, sizeof(buf));
272 av_log(h, AV_LOG_WARNING,
273 "Connection to %s failed (%s), trying next address\n",
276 av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n",
286 static int libsrt_setsockopt(URLContext *h, int fd, SRT_SOCKOPT optname, const char * optnamestr, const void * optval, int optlen)
288 if (srt_setsockopt(fd, 0, optname, optval, optlen) < 0) {
289 av_log(h, AV_LOG_ERROR, "failed to set option %s on socket: %s\n", optnamestr, srt_getlasterror_str());
295 static int libsrt_getsockopt(URLContext *h, int fd, SRT_SOCKOPT optname, const char * optnamestr, void * optval, int * optlen)
297 if (srt_getsockopt(fd, 0, optname, optval, optlen) < 0) {
298 av_log(h, AV_LOG_ERROR, "failed to get option %s on socket: %s\n", optnamestr, srt_getlasterror_str());
304 /* - The "POST" options can be altered any time on a connected socket.
305 They MAY have also some meaning when set prior to connecting; such
306 option is SRTO_RCVSYN, which makes connect/accept call asynchronous.
307 Because of that this option is treated special way in this app. */
308 static int libsrt_set_options_post(URLContext *h, int fd)
310 SRTContext *s = h->priv_data;
312 if ((s->inputbw >= 0 && libsrt_setsockopt(h, fd, SRTO_INPUTBW, "SRTO_INPUTBW", &s->inputbw, sizeof(s->inputbw)) < 0) ||
313 (s->oheadbw >= 0 && libsrt_setsockopt(h, fd, SRTO_OHEADBW, "SRTO_OHEADBW", &s->oheadbw, sizeof(s->oheadbw)) < 0)) {
319 /* - The "PRE" options must be set prior to connecting and can't be altered
320 on a connected socket, however if set on a listening socket, they are
321 derived by accept-ed socket. */
322 static int libsrt_set_options_pre(URLContext *h, int fd)
324 SRTContext *s = h->priv_data;
326 int latency = s->latency / 1000;
327 int rcvlatency = s->rcvlatency / 1000;
328 int peerlatency = s->peerlatency / 1000;
329 int connect_timeout = s->connect_timeout;
331 if ((s->mode == SRT_MODE_RENDEZVOUS && libsrt_setsockopt(h, fd, SRTO_RENDEZVOUS, "SRTO_RENDEZVOUS", &yes, sizeof(yes)) < 0) ||
332 (s->transtype != SRTT_INVALID && libsrt_setsockopt(h, fd, SRTO_TRANSTYPE, "SRTO_TRANSTYPE", &s->transtype, sizeof(s->transtype)) < 0) ||
333 (s->maxbw >= 0 && libsrt_setsockopt(h, fd, SRTO_MAXBW, "SRTO_MAXBW", &s->maxbw, sizeof(s->maxbw)) < 0) ||
334 (s->pbkeylen >= 0 && libsrt_setsockopt(h, fd, SRTO_PBKEYLEN, "SRTO_PBKEYLEN", &s->pbkeylen, sizeof(s->pbkeylen)) < 0) ||
335 (s->passphrase && libsrt_setsockopt(h, fd, SRTO_PASSPHRASE, "SRTO_PASSPHRASE", s->passphrase, strlen(s->passphrase)) < 0) ||
336 #if SRT_VERSION_VALUE >= 0x010302
337 /* SRTO_STRICTENC == SRTO_ENFORCEDENCRYPTION (53), but for compatibility, we used SRTO_STRICTENC */
338 (s->enforced_encryption >= 0 && libsrt_setsockopt(h, fd, SRTO_STRICTENC, "SRTO_STRICTENC", &s->enforced_encryption, sizeof(s->enforced_encryption)) < 0) ||
339 (s->kmrefreshrate >= 0 && libsrt_setsockopt(h, fd, SRTO_KMREFRESHRATE, "SRTO_KMREFRESHRATE", &s->kmrefreshrate, sizeof(s->kmrefreshrate)) < 0) ||
340 (s->kmpreannounce >= 0 && libsrt_setsockopt(h, fd, SRTO_KMPREANNOUNCE, "SRTO_KMPREANNOUNCE", &s->kmpreannounce, sizeof(s->kmpreannounce)) < 0) ||
342 (s->mss >= 0 && libsrt_setsockopt(h, fd, SRTO_MSS, "SRTO_MSS", &s->mss, sizeof(s->mss)) < 0) ||
343 (s->ffs >= 0 && libsrt_setsockopt(h, fd, SRTO_FC, "SRTO_FC", &s->ffs, sizeof(s->ffs)) < 0) ||
344 (s->ipttl >= 0 && libsrt_setsockopt(h, fd, SRTO_IPTTL, "SRTO_IPTTL", &s->ipttl, sizeof(s->ipttl)) < 0) ||
345 (s->iptos >= 0 && libsrt_setsockopt(h, fd, SRTO_IPTOS, "SRTO_IPTOS", &s->iptos, sizeof(s->iptos)) < 0) ||
346 (s->latency >= 0 && libsrt_setsockopt(h, fd, SRTO_LATENCY, "SRTO_LATENCY", &latency, sizeof(latency)) < 0) ||
347 (s->rcvlatency >= 0 && libsrt_setsockopt(h, fd, SRTO_RCVLATENCY, "SRTO_RCVLATENCY", &rcvlatency, sizeof(rcvlatency)) < 0) ||
348 (s->peerlatency >= 0 && libsrt_setsockopt(h, fd, SRTO_PEERLATENCY, "SRTO_PEERLATENCY", &peerlatency, sizeof(peerlatency)) < 0) ||
349 (s->tlpktdrop >= 0 && libsrt_setsockopt(h, fd, SRTO_TLPKTDROP, "SRTO_TLPKDROP", &s->tlpktdrop, sizeof(s->tlpktdrop)) < 0) ||
350 (s->nakreport >= 0 && libsrt_setsockopt(h, fd, SRTO_NAKREPORT, "SRTO_NAKREPORT", &s->nakreport, sizeof(s->nakreport)) < 0) ||
351 (connect_timeout >= 0 && libsrt_setsockopt(h, fd, SRTO_CONNTIMEO, "SRTO_CONNTIMEO", &connect_timeout, sizeof(connect_timeout)) <0 ) ||
352 (s->sndbuf >= 0 && libsrt_setsockopt(h, fd, SRTO_SNDBUF, "SRTO_SNDBUF", &s->sndbuf, sizeof(s->sndbuf)) < 0) ||
353 (s->rcvbuf >= 0 && libsrt_setsockopt(h, fd, SRTO_RCVBUF, "SRTO_RCVBUF", &s->rcvbuf, sizeof(s->rcvbuf)) < 0) ||
354 (s->lossmaxttl >= 0 && libsrt_setsockopt(h, fd, SRTO_LOSSMAXTTL, "SRTO_LOSSMAXTTL", &s->lossmaxttl, sizeof(s->lossmaxttl)) < 0) ||
355 (s->minversion >= 0 && libsrt_setsockopt(h, fd, SRTO_MINVERSION, "SRTO_MINVERSION", &s->minversion, sizeof(s->minversion)) < 0) ||
356 (s->streamid && libsrt_setsockopt(h, fd, SRTO_STREAMID, "SRTO_STREAMID", s->streamid, strlen(s->streamid)) < 0) ||
357 (s->smoother && libsrt_setsockopt(h, fd, SRTO_SMOOTHER, "SRTO_SMOOTHER", s->smoother, strlen(s->smoother)) < 0) ||
358 (s->messageapi >= 0 && libsrt_setsockopt(h, fd, SRTO_MESSAGEAPI, "SRTO_MESSAGEAPI", &s->messageapi, sizeof(s->messageapi)) < 0) ||
359 (s->payload_size >= 0 && libsrt_setsockopt(h, fd, SRTO_PAYLOADSIZE, "SRTO_PAYLOADSIZE", &s->payload_size, sizeof(s->payload_size)) < 0) ||
360 ((h->flags & AVIO_FLAG_WRITE) && libsrt_setsockopt(h, fd, SRTO_SENDER, "SRTO_SENDER", &yes, sizeof(yes)) < 0)) {
364 if (s->linger >= 0) {
366 lin.l_linger = s->linger;
367 lin.l_onoff = lin.l_linger > 0 ? 1 : 0;
368 if (libsrt_setsockopt(h, fd, SRTO_LINGER, "SRTO_LINGER", &lin, sizeof(lin)) < 0)
375 static int libsrt_setup(URLContext *h, const char *uri, int flags)
377 struct addrinfo hints = { 0 }, *ai, *cur_ai;
379 SRTContext *s = h->priv_data;
383 char hostname[1024],proto[1024],path[1024];
385 int open_timeout = 5000000;
388 eid = srt_epoll_create();
390 return libsrt_neterrno(h);
393 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
394 &port, path, sizeof(path), uri);
395 if (strcmp(proto, "srt"))
396 return AVERROR(EINVAL);
397 if (port <= 0 || port >= 65536) {
398 av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
399 return AVERROR(EINVAL);
401 p = strchr(uri, '?');
403 if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
404 s->rw_timeout = strtol(buf, NULL, 10);
406 if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
407 s->listen_timeout = strtol(buf, NULL, 10);
410 if (s->rw_timeout >= 0) {
411 open_timeout = h->rw_timeout = s->rw_timeout;
413 hints.ai_family = AF_UNSPEC;
414 hints.ai_socktype = SOCK_DGRAM;
415 snprintf(portstr, sizeof(portstr), "%d", port);
416 if (s->mode == SRT_MODE_LISTENER)
417 hints.ai_flags |= AI_PASSIVE;
418 ret = getaddrinfo(hostname[0] ? hostname : NULL, portstr, &hints, &ai);
420 av_log(h, AV_LOG_ERROR,
421 "Failed to resolve hostname %s: %s\n",
422 hostname, gai_strerror(ret));
430 fd = srt_socket(cur_ai->ai_family, cur_ai->ai_socktype, 0);
432 ret = libsrt_neterrno(h);
436 if ((ret = libsrt_set_options_pre(h, fd)) < 0) {
440 /* Set the socket's send or receive buffer sizes, if specified.
441 If unspecified or setting fails, system default is used. */
442 if (s->recv_buffer_size > 0) {
443 srt_setsockopt(fd, SOL_SOCKET, SRTO_UDP_RCVBUF, &s->recv_buffer_size, sizeof (s->recv_buffer_size));
445 if (s->send_buffer_size > 0) {
446 srt_setsockopt(fd, SOL_SOCKET, SRTO_UDP_SNDBUF, &s->send_buffer_size, sizeof (s->send_buffer_size));
448 if (s->mode == SRT_MODE_LISTENER) {
450 if ((ret = libsrt_listen(s->eid, fd, cur_ai->ai_addr, cur_ai->ai_addrlen, h, open_timeout / 1000)) < 0)
454 if (s->mode == SRT_MODE_RENDEZVOUS) {
455 ret = srt_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
460 if ((ret = libsrt_listen_connect(s->eid, fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
461 open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {
462 if (ret == AVERROR_EXIT)
468 if ((ret = libsrt_set_options_post(h, fd)) < 0) {
472 if (flags & AVIO_FLAG_WRITE) {
474 int optlen = sizeof(packet_size);
475 ret = libsrt_getsockopt(h, fd, SRTO_PAYLOADSIZE, "SRTO_PAYLOADSIZE", &packet_size, &optlen);
479 h->max_packet_size = packet_size;
489 if (cur_ai->ai_next) {
490 /* Retry with the next sockaddr */
491 cur_ai = cur_ai->ai_next;
504 static int libsrt_open(URLContext *h, const char *uri, int flags)
506 SRTContext *s = h->priv_data;
511 if (srt_startup() < 0) {
512 return AVERROR_UNKNOWN;
515 /* SRT options (srt/srt.h) */
516 p = strchr(uri, '?');
518 if (av_find_info_tag(buf, sizeof(buf), "maxbw", p)) {
519 s->maxbw = strtoll(buf, NULL, 0);
521 if (av_find_info_tag(buf, sizeof(buf), "pbkeylen", p)) {
522 s->pbkeylen = strtol(buf, NULL, 10);
524 if (av_find_info_tag(buf, sizeof(buf), "passphrase", p)) {
525 av_freep(&s->passphrase);
526 s->passphrase = av_strndup(buf, strlen(buf));
528 #if SRT_VERSION_VALUE >= 0x010302
529 if (av_find_info_tag(buf, sizeof(buf), "enforced_encryption", p)) {
530 s->enforced_encryption = strtol(buf, NULL, 10);
532 if (av_find_info_tag(buf, sizeof(buf), "kmrefreshrate", p)) {
533 s->kmrefreshrate = strtol(buf, NULL, 10);
535 if (av_find_info_tag(buf, sizeof(buf), "kmpreannounce", p)) {
536 s->kmpreannounce = strtol(buf, NULL, 10);
539 if (av_find_info_tag(buf, sizeof(buf), "mss", p)) {
540 s->mss = strtol(buf, NULL, 10);
542 if (av_find_info_tag(buf, sizeof(buf), "ffs", p)) {
543 s->ffs = strtol(buf, NULL, 10);
545 if (av_find_info_tag(buf, sizeof(buf), "ipttl", p)) {
546 s->ipttl = strtol(buf, NULL, 10);
548 if (av_find_info_tag(buf, sizeof(buf), "iptos", p)) {
549 s->iptos = strtol(buf, NULL, 10);
551 if (av_find_info_tag(buf, sizeof(buf), "inputbw", p)) {
552 s->inputbw = strtoll(buf, NULL, 10);
554 if (av_find_info_tag(buf, sizeof(buf), "oheadbw", p)) {
555 s->oheadbw = strtoll(buf, NULL, 10);
557 if (av_find_info_tag(buf, sizeof(buf), "latency", p)) {
558 s->latency = strtol(buf, NULL, 10);
560 if (av_find_info_tag(buf, sizeof(buf), "tsbpddelay", p)) {
561 s->latency = strtol(buf, NULL, 10);
563 if (av_find_info_tag(buf, sizeof(buf), "rcvlatency", p)) {
564 s->rcvlatency = strtol(buf, NULL, 10);
566 if (av_find_info_tag(buf, sizeof(buf), "peerlatency", p)) {
567 s->peerlatency = strtol(buf, NULL, 10);
569 if (av_find_info_tag(buf, sizeof(buf), "tlpktdrop", p)) {
570 s->tlpktdrop = strtol(buf, NULL, 10);
572 if (av_find_info_tag(buf, sizeof(buf), "nakreport", p)) {
573 s->nakreport = strtol(buf, NULL, 10);
575 if (av_find_info_tag(buf, sizeof(buf), "connect_timeout", p)) {
576 s->connect_timeout = strtol(buf, NULL, 10);
578 if (av_find_info_tag(buf, sizeof(buf), "payload_size", p) ||
579 av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
580 s->payload_size = strtol(buf, NULL, 10);
582 if (av_find_info_tag(buf, sizeof(buf), "mode", p)) {
583 if (!strcmp(buf, "caller")) {
584 s->mode = SRT_MODE_CALLER;
585 } else if (!strcmp(buf, "listener")) {
586 s->mode = SRT_MODE_LISTENER;
587 } else if (!strcmp(buf, "rendezvous")) {
588 s->mode = SRT_MODE_RENDEZVOUS;
593 if (av_find_info_tag(buf, sizeof(buf), "sndbuf", p)) {
594 s->sndbuf = strtol(buf, NULL, 10);
596 if (av_find_info_tag(buf, sizeof(buf), "rcvbuf", p)) {
597 s->rcvbuf = strtol(buf, NULL, 10);
599 if (av_find_info_tag(buf, sizeof(buf), "lossmaxttl", p)) {
600 s->lossmaxttl = strtol(buf, NULL, 10);
602 if (av_find_info_tag(buf, sizeof(buf), "minversion", p)) {
603 s->minversion = strtol(buf, NULL, 0);
605 if (av_find_info_tag(buf, sizeof(buf), "streamid", p)) {
606 av_freep(&s->streamid);
607 s->streamid = av_strdup(buf);
609 ret = AVERROR(ENOMEM);
613 if (av_find_info_tag(buf, sizeof(buf), "smoother", p)) {
614 av_freep(&s->smoother);
615 s->smoother = av_strdup(buf);
617 ret = AVERROR(ENOMEM);
621 if (av_find_info_tag(buf, sizeof(buf), "messageapi", p)) {
622 s->messageapi = strtol(buf, NULL, 10);
624 if (av_find_info_tag(buf, sizeof(buf), "transtype", p)) {
625 if (!strcmp(buf, "live")) {
626 s->transtype = SRTT_LIVE;
627 } else if (!strcmp(buf, "file")) {
628 s->transtype = SRTT_FILE;
630 ret = AVERROR(EINVAL);
634 if (av_find_info_tag(buf, sizeof(buf), "linger", p)) {
635 s->linger = strtol(buf, NULL, 10);
638 return libsrt_setup(h, uri, flags);
640 av_freep(&s->smoother);
641 av_freep(&s->streamid);
645 static int libsrt_read(URLContext *h, uint8_t *buf, int size)
647 SRTContext *s = h->priv_data;
650 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
651 ret = libsrt_network_wait_fd_timeout(h, s->eid, s->fd, 0, h->rw_timeout, &h->interrupt_callback);
656 ret = srt_recvmsg(s->fd, buf, size);
658 ret = libsrt_neterrno(h);
664 static int libsrt_write(URLContext *h, const uint8_t *buf, int size)
666 SRTContext *s = h->priv_data;
669 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
670 ret = libsrt_network_wait_fd_timeout(h, s->eid, s->fd, 1, h->rw_timeout, &h->interrupt_callback);
675 ret = srt_sendmsg(s->fd, buf, size, -1, 0);
677 ret = libsrt_neterrno(h);
683 static int libsrt_close(URLContext *h)
685 SRTContext *s = h->priv_data;
689 srt_epoll_release(s->eid);
696 static int libsrt_get_file_handle(URLContext *h)
698 SRTContext *s = h->priv_data;
702 static const AVClass libsrt_class = {
703 .class_name = "libsrt",
704 .item_name = av_default_item_name,
705 .option = libsrt_options,
706 .version = LIBAVUTIL_VERSION_INT,
709 const URLProtocol ff_libsrt_protocol = {
711 .url_open = libsrt_open,
712 .url_read = libsrt_read,
713 .url_write = libsrt_write,
714 .url_close = libsrt_close,
715 .url_get_file_handle = libsrt_get_file_handle,
716 .priv_data_size = sizeof(SRTContext),
717 .flags = URL_PROTOCOL_FLAG_NETWORK,
718 .priv_data_class = &libsrt_class,