2 * RTMP network protocol
3 * Copyright (c) 2009 Konstantin Shishkov
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libavcodec/bytestream.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/base64.h"
30 #include "libavutil/intfloat.h"
31 #include "libavutil/lfg.h"
32 #include "libavutil/md5.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/random_seed.h"
35 #include "libavutil/sha.h"
43 #include "rtmpcrypt.h"
51 #define APP_MAX_LENGTH 1024
52 #define PLAYPATH_MAX_LENGTH 256
53 #define TCURL_MAX_LENGTH 512
54 #define FLASHVER_MAX_LENGTH 64
55 #define RTMP_PKTDATA_DEFAULT_SIZE 4096
56 #define RTMP_HEADER 11
58 /** RTMP protocol handler state */
60 STATE_START, ///< client has not done anything yet
61 STATE_HANDSHAKED, ///< client has performed handshake
62 STATE_FCPUBLISH, ///< client FCPublishing stream (for output)
63 STATE_PLAYING, ///< client has started receiving multimedia data from server
64 STATE_SEEKING, ///< client has started the seek operation. Back on STATE_PLAYING when the time comes
65 STATE_PUBLISHING, ///< client has started sending multimedia data to server (for output)
66 STATE_RECEIVING, ///< received a publish command (for input)
67 STATE_SENDING, ///< received a play command (for output)
68 STATE_STOPPED, ///< the broadcast has been stopped
71 typedef struct TrackedMethod {
76 /** protocol handler context */
77 typedef struct RTMPContext {
79 URLContext* stream; ///< TCP stream used in interactions with RTMP server
80 RTMPPacket *prev_pkt[2]; ///< packet history used when reading and sending packets ([0] for reading, [1] for writing)
81 int nb_prev_pkt[2]; ///< number of elements in prev_pkt
82 int in_chunk_size; ///< size of the chunks incoming RTMP packets are divided into
83 int out_chunk_size; ///< size of the chunks outgoing RTMP packets are divided into
84 int is_input; ///< input/output flag
85 char *playpath; ///< stream identifier to play (with possible "mp4:" prefix)
86 int live; ///< 0: recorded, -1: live, -2: both
87 char *app; ///< name of application
88 char *conn; ///< append arbitrary AMF data to the Connect message
89 ClientState state; ///< current state
90 int stream_id; ///< ID assigned by the server for the stream
91 uint8_t* flv_data; ///< buffer with data for demuxer
92 int flv_size; ///< current buffer size
93 int flv_off; ///< number of bytes read from current buffer
94 int flv_nb_packets; ///< number of flv packets published
95 RTMPPacket out_pkt; ///< rtmp packet, created from flv a/v or metadata (for output)
96 uint32_t client_report_size; ///< number of bytes after which client should report to server
97 uint32_t bytes_read; ///< number of bytes read from server
98 uint32_t last_bytes_read; ///< number of bytes read last reported to server
99 int skip_bytes; ///< number of bytes to skip from the input FLV stream in the next write call
100 int has_audio; ///< presence of audio data
101 int has_video; ///< presence of video data
102 int received_metadata; ///< Indicates if we have received metadata about the streams
103 uint8_t flv_header[RTMP_HEADER]; ///< partial incoming flv packet header
104 int flv_header_bytes; ///< number of initialized bytes in flv_header
105 int nb_invokes; ///< keeps track of invoke messages
106 char* tcurl; ///< url of the target stream
107 char* flashver; ///< version of the flash plugin
108 char* swfhash; ///< SHA256 hash of the decompressed SWF file (32 bytes)
109 int swfhash_len; ///< length of the SHA256 hash
110 int swfsize; ///< size of the decompressed SWF file
111 char* swfurl; ///< url of the swf player
112 char* swfverify; ///< URL to player swf file, compute hash/size automatically
113 char swfverification[42]; ///< hash of the SWF verification
114 char* pageurl; ///< url of the web page
115 char* subscribe; ///< name of live stream to subscribe
116 int server_bw; ///< server bandwidth
117 int client_buffer_time; ///< client buffer time in ms
118 int flush_interval; ///< number of packets flushed in the same request (RTMPT only)
119 int encrypted; ///< use an encrypted connection (RTMPE only)
120 TrackedMethod*tracked_methods; ///< tracked methods buffer
121 int nb_tracked_methods; ///< number of tracked methods
122 int tracked_methods_size; ///< size of the tracked methods buffer
123 int listen; ///< listen mode flag
124 int listen_timeout; ///< listen timeout to wait for new connections
125 int nb_streamid; ///< The next stream id to return on createStream calls
128 char auth_params[500];
133 #define PLAYER_KEY_OPEN_PART_LEN 30 ///< length of partial key used for first client digest signing
134 /** Client key used for digest signing */
135 static const uint8_t rtmp_player_key[] = {
136 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
137 'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ', '0', '0', '1',
139 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02,
140 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8,
141 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE
144 #define SERVER_KEY_OPEN_PART_LEN 36 ///< length of partial key used for first server digest signing
145 /** Key used for RTMP server digest signing */
146 static const uint8_t rtmp_server_key[] = {
147 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
148 'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ',
149 'S', 'e', 'r', 'v', 'e', 'r', ' ', '0', '0', '1',
151 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02,
152 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8,
153 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE
156 static int handle_chunk_size(URLContext *s, RTMPPacket *pkt);
158 static int add_tracked_method(RTMPContext *rt, const char *name, int id)
162 if (rt->nb_tracked_methods + 1 > rt->tracked_methods_size) {
163 rt->tracked_methods_size = (rt->nb_tracked_methods + 1) * 2;
164 if ((err = av_reallocp(&rt->tracked_methods, rt->tracked_methods_size *
165 sizeof(*rt->tracked_methods))) < 0) {
166 rt->nb_tracked_methods = 0;
167 rt->tracked_methods_size = 0;
172 rt->tracked_methods[rt->nb_tracked_methods].name = av_strdup(name);
173 if (!rt->tracked_methods[rt->nb_tracked_methods].name)
174 return AVERROR(ENOMEM);
175 rt->tracked_methods[rt->nb_tracked_methods].id = id;
176 rt->nb_tracked_methods++;
181 static void del_tracked_method(RTMPContext *rt, int index)
183 memmove(&rt->tracked_methods[index], &rt->tracked_methods[index + 1],
184 sizeof(*rt->tracked_methods) * (rt->nb_tracked_methods - index - 1));
185 rt->nb_tracked_methods--;
188 static int find_tracked_method(URLContext *s, RTMPPacket *pkt, int offset,
189 char **tracked_method)
191 RTMPContext *rt = s->priv_data;
197 bytestream2_init(&gbc, pkt->data + offset, pkt->size - offset);
198 if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0)
201 for (i = 0; i < rt->nb_tracked_methods; i++) {
202 if (rt->tracked_methods[i].id != pkt_id)
205 *tracked_method = rt->tracked_methods[i].name;
206 del_tracked_method(rt, i);
213 static void free_tracked_methods(RTMPContext *rt)
217 for (i = 0; i < rt->nb_tracked_methods; i ++)
218 av_free(rt->tracked_methods[i].name);
219 av_free(rt->tracked_methods);
220 rt->tracked_methods = NULL;
221 rt->tracked_methods_size = 0;
222 rt->nb_tracked_methods = 0;
225 static int rtmp_send_packet(RTMPContext *rt, RTMPPacket *pkt, int track)
229 if (pkt->type == RTMP_PT_INVOKE && track) {
235 bytestream2_init(&gbc, pkt->data, pkt->size);
236 if ((ret = ff_amf_read_string(&gbc, name, sizeof(name), &len)) < 0)
239 if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0)
242 if ((ret = add_tracked_method(rt, name, pkt_id)) < 0)
246 ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
247 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
249 ff_rtmp_packet_destroy(pkt);
253 static int rtmp_write_amf_data(URLContext *s, char *param, uint8_t **p)
258 /* The type must be B for Boolean, N for number, S for string, O for
259 * object, or Z for null. For Booleans the data must be either 0 or 1 for
260 * FALSE or TRUE, respectively. Likewise for Objects the data must be
261 * 0 or 1 to end or begin an object, respectively. Data items in subobjects
262 * may be named, by prefixing the type with 'N' and specifying the name
263 * before the value (ie. NB:myFlag:1). This option may be used multiple times
264 * to construct arbitrary AMF sequences. */
265 if (param[0] && param[1] == ':') {
268 } else if (param[0] == 'N' && param[1] && param[2] == ':') {
271 value = strchr(field, ':');
277 ff_amf_write_field_name(p, field);
284 ff_amf_write_bool(p, value[0] != '0');
287 ff_amf_write_string(p, value);
290 ff_amf_write_number(p, strtod(value, NULL));
293 ff_amf_write_null(p);
297 ff_amf_write_object_start(p);
299 ff_amf_write_object_end(p);
309 av_log(s, AV_LOG_ERROR, "Invalid AMF parameter: %s\n", param);
310 return AVERROR(EINVAL);
314 * Generate 'connect' call and send it to the server.
316 static int gen_connect(URLContext *s, RTMPContext *rt)
322 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
323 0, 4096 + APP_MAX_LENGTH)) < 0)
328 ff_amf_write_string(&p, "connect");
329 ff_amf_write_number(&p, ++rt->nb_invokes);
330 ff_amf_write_object_start(&p);
331 ff_amf_write_field_name(&p, "app");
332 ff_amf_write_string2(&p, rt->app, rt->auth_params);
335 ff_amf_write_field_name(&p, "type");
336 ff_amf_write_string(&p, "nonprivate");
338 ff_amf_write_field_name(&p, "flashVer");
339 ff_amf_write_string(&p, rt->flashver);
342 ff_amf_write_field_name(&p, "swfUrl");
343 ff_amf_write_string(&p, rt->swfurl);
346 ff_amf_write_field_name(&p, "tcUrl");
347 ff_amf_write_string2(&p, rt->tcurl, rt->auth_params);
349 ff_amf_write_field_name(&p, "fpad");
350 ff_amf_write_bool(&p, 0);
351 ff_amf_write_field_name(&p, "capabilities");
352 ff_amf_write_number(&p, 15.0);
354 /* Tell the server we support all the audio codecs except
355 * SUPPORT_SND_INTEL (0x0008) and SUPPORT_SND_UNUSED (0x0010)
356 * which are unused in the RTMP protocol implementation. */
357 ff_amf_write_field_name(&p, "audioCodecs");
358 ff_amf_write_number(&p, 4071.0);
359 ff_amf_write_field_name(&p, "videoCodecs");
360 ff_amf_write_number(&p, 252.0);
361 ff_amf_write_field_name(&p, "videoFunction");
362 ff_amf_write_number(&p, 1.0);
365 ff_amf_write_field_name(&p, "pageUrl");
366 ff_amf_write_string(&p, rt->pageurl);
369 ff_amf_write_object_end(&p);
372 char *param = rt->conn;
374 // Write arbitrary AMF data to the Connect message.
375 while (param != NULL) {
377 param += strspn(param, " ");
380 sep = strchr(param, ' ');
383 if ((ret = rtmp_write_amf_data(s, param, &p)) < 0) {
384 // Invalid AMF parameter.
385 ff_rtmp_packet_destroy(&pkt);
396 pkt.size = p - pkt.data;
398 return rtmp_send_packet(rt, &pkt, 1);
401 static int read_connect(URLContext *s, RTMPContext *rt)
403 RTMPPacket pkt = { 0 };
413 if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size,
414 &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0)
417 if (pkt.type == RTMP_PT_CHUNK_SIZE) {
418 if ((ret = handle_chunk_size(s, &pkt)) < 0)
421 ff_rtmp_packet_destroy(&pkt);
422 if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size,
423 &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0)
428 bytestream2_init(&gbc, cp, pkt.size);
429 if (ff_amf_read_string(&gbc, command, sizeof(command), &stringlen)) {
430 av_log(s, AV_LOG_ERROR, "Unable to read command string\n");
431 ff_rtmp_packet_destroy(&pkt);
432 return AVERROR_INVALIDDATA;
434 if (strcmp(command, "connect")) {
435 av_log(s, AV_LOG_ERROR, "Expecting connect, got %s\n", command);
436 ff_rtmp_packet_destroy(&pkt);
437 return AVERROR_INVALIDDATA;
439 ret = ff_amf_read_number(&gbc, &seqnum);
441 av_log(s, AV_LOG_WARNING, "SeqNum not found\n");
442 /* Here one could parse an AMF Object with data as flashVers and others. */
443 ret = ff_amf_get_field_value(gbc.buffer,
444 gbc.buffer + bytestream2_get_bytes_left(&gbc),
445 "app", tmpstr, sizeof(tmpstr));
447 av_log(s, AV_LOG_WARNING, "App field not found in connect\n");
448 if (!ret && strcmp(tmpstr, rt->app))
449 av_log(s, AV_LOG_WARNING, "App field don't match up: %s <-> %s\n",
451 ff_rtmp_packet_destroy(&pkt);
453 // Send Window Acknowledgement Size (as defined in speficication)
454 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
455 RTMP_PT_SERVER_BW, 0, 4)) < 0)
458 bytestream_put_be32(&p, rt->server_bw);
459 pkt.size = p - pkt.data;
460 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
461 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
462 ff_rtmp_packet_destroy(&pkt);
465 // Send Peer Bandwidth
466 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
467 RTMP_PT_CLIENT_BW, 0, 5)) < 0)
470 bytestream_put_be32(&p, rt->server_bw);
471 bytestream_put_byte(&p, 2); // dynamic
472 pkt.size = p - pkt.data;
473 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
474 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
475 ff_rtmp_packet_destroy(&pkt);
480 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
481 RTMP_PT_PING, 0, 6)) < 0)
485 bytestream_put_be16(&p, 0); // 0 -> Stream Begin
486 bytestream_put_be32(&p, 0);
487 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
488 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
489 ff_rtmp_packet_destroy(&pkt);
494 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
495 RTMP_PT_CHUNK_SIZE, 0, 4)) < 0)
499 bytestream_put_be32(&p, rt->out_chunk_size);
500 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
501 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
502 ff_rtmp_packet_destroy(&pkt);
506 // Send result_ NetConnection.Connect.Success to connect
507 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
509 RTMP_PKTDATA_DEFAULT_SIZE)) < 0)
513 ff_amf_write_string(&p, "_result");
514 ff_amf_write_number(&p, seqnum);
516 ff_amf_write_object_start(&p);
517 ff_amf_write_field_name(&p, "fmsVer");
518 ff_amf_write_string(&p, "FMS/3,0,1,123");
519 ff_amf_write_field_name(&p, "capabilities");
520 ff_amf_write_number(&p, 31);
521 ff_amf_write_object_end(&p);
523 ff_amf_write_object_start(&p);
524 ff_amf_write_field_name(&p, "level");
525 ff_amf_write_string(&p, "status");
526 ff_amf_write_field_name(&p, "code");
527 ff_amf_write_string(&p, "NetConnection.Connect.Success");
528 ff_amf_write_field_name(&p, "description");
529 ff_amf_write_string(&p, "Connection succeeded.");
530 ff_amf_write_field_name(&p, "objectEncoding");
531 ff_amf_write_number(&p, 0);
532 ff_amf_write_object_end(&p);
534 pkt.size = p - pkt.data;
535 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
536 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
537 ff_rtmp_packet_destroy(&pkt);
541 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
542 RTMP_PT_INVOKE, 0, 30)) < 0)
545 ff_amf_write_string(&p, "onBWDone");
546 ff_amf_write_number(&p, 0);
547 ff_amf_write_null(&p);
548 ff_amf_write_number(&p, 8192);
549 pkt.size = p - pkt.data;
550 ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
551 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
552 ff_rtmp_packet_destroy(&pkt);
558 * Generate 'releaseStream' call and send it to the server. It should make
559 * the server release some channel for media streams.
561 static int gen_release_stream(URLContext *s, RTMPContext *rt)
567 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
568 0, 29 + strlen(rt->playpath))) < 0)
571 av_log(s, AV_LOG_DEBUG, "Releasing stream...\n");
573 ff_amf_write_string(&p, "releaseStream");
574 ff_amf_write_number(&p, ++rt->nb_invokes);
575 ff_amf_write_null(&p);
576 ff_amf_write_string(&p, rt->playpath);
578 return rtmp_send_packet(rt, &pkt, 1);
582 * Generate 'FCPublish' call and send it to the server. It should make
583 * the server preapare for receiving media streams.
585 static int gen_fcpublish_stream(URLContext *s, RTMPContext *rt)
591 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
592 0, 25 + strlen(rt->playpath))) < 0)
595 av_log(s, AV_LOG_DEBUG, "FCPublish stream...\n");
597 ff_amf_write_string(&p, "FCPublish");
598 ff_amf_write_number(&p, ++rt->nb_invokes);
599 ff_amf_write_null(&p);
600 ff_amf_write_string(&p, rt->playpath);
602 return rtmp_send_packet(rt, &pkt, 1);
606 * Generate 'FCUnpublish' call and send it to the server. It should make
607 * the server destroy stream.
609 static int gen_fcunpublish_stream(URLContext *s, RTMPContext *rt)
615 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
616 0, 27 + strlen(rt->playpath))) < 0)
619 av_log(s, AV_LOG_DEBUG, "UnPublishing stream...\n");
621 ff_amf_write_string(&p, "FCUnpublish");
622 ff_amf_write_number(&p, ++rt->nb_invokes);
623 ff_amf_write_null(&p);
624 ff_amf_write_string(&p, rt->playpath);
626 return rtmp_send_packet(rt, &pkt, 0);
630 * Generate 'createStream' call and send it to the server. It should make
631 * the server allocate some channel for media streams.
633 static int gen_create_stream(URLContext *s, RTMPContext *rt)
639 av_log(s, AV_LOG_DEBUG, "Creating stream...\n");
641 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
646 ff_amf_write_string(&p, "createStream");
647 ff_amf_write_number(&p, ++rt->nb_invokes);
648 ff_amf_write_null(&p);
650 return rtmp_send_packet(rt, &pkt, 1);
655 * Generate 'deleteStream' call and send it to the server. It should make
656 * the server remove some channel for media streams.
658 static int gen_delete_stream(URLContext *s, RTMPContext *rt)
664 av_log(s, AV_LOG_DEBUG, "Deleting stream...\n");
666 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
671 ff_amf_write_string(&p, "deleteStream");
672 ff_amf_write_number(&p, ++rt->nb_invokes);
673 ff_amf_write_null(&p);
674 ff_amf_write_number(&p, rt->stream_id);
676 return rtmp_send_packet(rt, &pkt, 0);
680 * Generate client buffer time and send it to the server.
682 static int gen_buffer_time(URLContext *s, RTMPContext *rt)
688 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
693 bytestream_put_be16(&p, 3);
694 bytestream_put_be32(&p, rt->stream_id);
695 bytestream_put_be32(&p, rt->client_buffer_time);
697 return rtmp_send_packet(rt, &pkt, 0);
701 * Generate 'play' call and send it to the server, then ping the server
702 * to start actual playing.
704 static int gen_play(URLContext *s, RTMPContext *rt)
710 av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath);
712 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
713 0, 29 + strlen(rt->playpath))) < 0)
716 pkt.extra = rt->stream_id;
719 ff_amf_write_string(&p, "play");
720 ff_amf_write_number(&p, ++rt->nb_invokes);
721 ff_amf_write_null(&p);
722 ff_amf_write_string(&p, rt->playpath);
723 ff_amf_write_number(&p, rt->live * 1000);
725 return rtmp_send_packet(rt, &pkt, 1);
728 static int gen_seek(URLContext *s, RTMPContext *rt, int64_t timestamp)
734 av_log(s, AV_LOG_DEBUG, "Sending seek command for timestamp %"PRId64"\n",
737 if ((ret = ff_rtmp_packet_create(&pkt, 3, RTMP_PT_INVOKE, 0, 26)) < 0)
740 pkt.extra = rt->stream_id;
743 ff_amf_write_string(&p, "seek");
744 ff_amf_write_number(&p, 0); //no tracking back responses
745 ff_amf_write_null(&p); //as usual, the first null param
746 ff_amf_write_number(&p, timestamp); //where we want to jump
748 return rtmp_send_packet(rt, &pkt, 1);
752 * Generate 'publish' call and send it to the server.
754 static int gen_publish(URLContext *s, RTMPContext *rt)
760 av_log(s, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath);
762 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
763 0, 30 + strlen(rt->playpath))) < 0)
766 pkt.extra = rt->stream_id;
769 ff_amf_write_string(&p, "publish");
770 ff_amf_write_number(&p, ++rt->nb_invokes);
771 ff_amf_write_null(&p);
772 ff_amf_write_string(&p, rt->playpath);
773 ff_amf_write_string(&p, "live");
775 return rtmp_send_packet(rt, &pkt, 1);
779 * Generate ping reply and send it to the server.
781 static int gen_pong(URLContext *s, RTMPContext *rt, RTMPPacket *ppkt)
787 if (ppkt->size < 6) {
788 av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n",
790 return AVERROR_INVALIDDATA;
793 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
794 ppkt->timestamp + 1, 6)) < 0)
798 bytestream_put_be16(&p, 7);
799 bytestream_put_be32(&p, AV_RB32(ppkt->data+2));
801 return rtmp_send_packet(rt, &pkt, 0);
805 * Generate SWF verification message and send it to the server.
807 static int gen_swf_verification(URLContext *s, RTMPContext *rt)
813 av_log(s, AV_LOG_DEBUG, "Sending SWF verification...\n");
814 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
819 bytestream_put_be16(&p, 27);
820 memcpy(p, rt->swfverification, 42);
822 return rtmp_send_packet(rt, &pkt, 0);
826 * Generate server bandwidth message and send it to the server.
828 static int gen_server_bw(URLContext *s, RTMPContext *rt)
834 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_SERVER_BW,
839 bytestream_put_be32(&p, rt->server_bw);
841 return rtmp_send_packet(rt, &pkt, 0);
845 * Generate check bandwidth message and send it to the server.
847 static int gen_check_bw(URLContext *s, RTMPContext *rt)
853 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
858 ff_amf_write_string(&p, "_checkbw");
859 ff_amf_write_number(&p, ++rt->nb_invokes);
860 ff_amf_write_null(&p);
862 return rtmp_send_packet(rt, &pkt, 1);
866 * Generate report on bytes read so far and send it to the server.
868 static int gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts)
874 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_BYTES_READ,
879 bytestream_put_be32(&p, rt->bytes_read);
881 return rtmp_send_packet(rt, &pkt, 0);
884 static int gen_fcsubscribe_stream(URLContext *s, RTMPContext *rt,
885 const char *subscribe)
891 if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
892 0, 27 + strlen(subscribe))) < 0)
896 ff_amf_write_string(&p, "FCSubscribe");
897 ff_amf_write_number(&p, ++rt->nb_invokes);
898 ff_amf_write_null(&p);
899 ff_amf_write_string(&p, subscribe);
901 return rtmp_send_packet(rt, &pkt, 1);
904 int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
905 const uint8_t *key, int keylen, uint8_t *dst)
908 uint8_t hmac_buf[64+32] = {0};
911 sha = av_sha_alloc();
913 return AVERROR(ENOMEM);
916 memcpy(hmac_buf, key, keylen);
918 av_sha_init(sha, 256);
919 av_sha_update(sha,key, keylen);
920 av_sha_final(sha, hmac_buf);
922 for (i = 0; i < 64; i++)
923 hmac_buf[i] ^= HMAC_IPAD_VAL;
925 av_sha_init(sha, 256);
926 av_sha_update(sha, hmac_buf, 64);
928 av_sha_update(sha, src, len);
929 } else { //skip 32 bytes used for storing digest
930 av_sha_update(sha, src, gap);
931 av_sha_update(sha, src + gap + 32, len - gap - 32);
933 av_sha_final(sha, hmac_buf + 64);
935 for (i = 0; i < 64; i++)
936 hmac_buf[i] ^= HMAC_IPAD_VAL ^ HMAC_OPAD_VAL; //reuse XORed key for opad
937 av_sha_init(sha, 256);
938 av_sha_update(sha, hmac_buf, 64+32);
939 av_sha_final(sha, dst);
946 int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val,
949 int i, digest_pos = 0;
951 for (i = 0; i < 4; i++)
952 digest_pos += buf[i + off];
953 digest_pos = digest_pos % mod_val + add_val;
959 * Put HMAC-SHA2 digest of packet data (except for the bytes where this digest
960 * will be stored) into that packet.
962 * @param buf handshake data (1536 bytes)
963 * @param encrypted use an encrypted connection (RTMPE)
964 * @return offset to the digest inside input data
966 static int rtmp_handshake_imprint_with_digest(uint8_t *buf, int encrypted)
971 digest_pos = ff_rtmp_calc_digest_pos(buf, 772, 728, 776);
973 digest_pos = ff_rtmp_calc_digest_pos(buf, 8, 728, 12);
975 ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos,
976 rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN,
985 * Verify that the received server response has the expected digest value.
987 * @param buf handshake data received from the server (1536 bytes)
988 * @param off position to search digest offset from
989 * @return 0 if digest is valid, digest position otherwise
991 static int rtmp_validate_digest(uint8_t *buf, int off)
996 digest_pos = ff_rtmp_calc_digest_pos(buf, off, 728, off + 4);
998 ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos,
999 rtmp_server_key, SERVER_KEY_OPEN_PART_LEN,
1004 if (!memcmp(digest, buf + digest_pos, 32))
1009 static int rtmp_calc_swf_verification(URLContext *s, RTMPContext *rt,
1015 if (rt->swfhash_len != 32) {
1016 av_log(s, AV_LOG_ERROR,
1017 "Hash of the decompressed SWF file is not 32 bytes long.\n");
1018 return AVERROR(EINVAL);
1021 p = &rt->swfverification[0];
1022 bytestream_put_byte(&p, 1);
1023 bytestream_put_byte(&p, 1);
1024 bytestream_put_be32(&p, rt->swfsize);
1025 bytestream_put_be32(&p, rt->swfsize);
1027 if ((ret = ff_rtmp_calc_digest(rt->swfhash, 32, 0, buf, 32, p)) < 0)
1034 static int rtmp_uncompress_swfplayer(uint8_t *in_data, int64_t in_size,
1035 uint8_t **out_data, int64_t *out_size)
1037 z_stream zs = { 0 };
1042 zs.avail_in = in_size;
1043 zs.next_in = in_data;
1044 ret = inflateInit(&zs);
1046 return AVERROR_UNKNOWN;
1049 uint8_t tmp_buf[16384];
1051 zs.avail_out = sizeof(tmp_buf);
1052 zs.next_out = tmp_buf;
1054 ret = inflate(&zs, Z_NO_FLUSH);
1055 if (ret != Z_OK && ret != Z_STREAM_END) {
1056 ret = AVERROR_UNKNOWN;
1060 size = sizeof(tmp_buf) - zs.avail_out;
1061 if (!(ptr = av_realloc(*out_data, *out_size + size))) {
1062 ret = AVERROR(ENOMEM);
1067 memcpy(*out_data + *out_size, tmp_buf, size);
1069 } while (zs.avail_out == 0);
1077 static int rtmp_calc_swfhash(URLContext *s)
1079 RTMPContext *rt = s->priv_data;
1080 uint8_t *in_data = NULL, *out_data = NULL, *swfdata;
1081 int64_t in_size, out_size;
1087 /* Get the SWF player file. */
1088 if ((ret = ffurl_open(&stream, rt->swfverify, AVIO_FLAG_READ,
1089 &s->interrupt_callback, NULL)) < 0) {
1090 av_log(s, AV_LOG_ERROR, "Cannot open connection %s.\n", rt->swfverify);
1094 if ((in_size = ffurl_seek(stream, 0, AVSEEK_SIZE)) < 0) {
1099 if (!(in_data = av_malloc(in_size))) {
1100 ret = AVERROR(ENOMEM);
1104 if ((ret = ffurl_read_complete(stream, in_data, in_size)) < 0)
1108 ret = AVERROR_INVALIDDATA;
1112 if (!memcmp(in_data, "CWS", 3)) {
1113 /* Decompress the SWF player file using Zlib. */
1114 if (!(out_data = av_malloc(8))) {
1115 ret = AVERROR(ENOMEM);
1118 *in_data = 'F'; // magic stuff
1119 memcpy(out_data, in_data, 8);
1123 if ((ret = rtmp_uncompress_swfplayer(in_data + 8, in_size - 8,
1124 &out_data, &out_size)) < 0)
1127 av_log(s, AV_LOG_ERROR,
1128 "Zlib is required for decompressing the SWF player file.\n");
1129 ret = AVERROR(EINVAL);
1139 /* Compute the SHA256 hash of the SWF player file. */
1140 if ((ret = ff_rtmp_calc_digest(swfdata, swfsize, 0,
1141 "Genuine Adobe Flash Player 001", 30,
1145 /* Set SWFVerification parameters. */
1146 av_opt_set_bin(rt, "rtmp_swfhash", swfhash, 32, 0);
1147 rt->swfsize = swfsize;
1151 av_freep(&out_data);
1152 ffurl_close(stream);
1157 * Perform handshake with the server by means of exchanging pseudorandom data
1158 * signed with HMAC-SHA2 digest.
1160 * @return 0 if handshake succeeds, negative value otherwise
1162 static int rtmp_handshake(URLContext *s, RTMPContext *rt)
1165 uint8_t tosend [RTMP_HANDSHAKE_PACKET_SIZE+1] = {
1166 3, // unencrypted data
1167 0, 0, 0, 0, // client uptime
1173 uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE];
1174 uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1];
1176 int server_pos, client_pos;
1177 uint8_t digest[32], signature[32];
1180 av_log(s, AV_LOG_DEBUG, "Handshaking...\n");
1182 av_lfg_init(&rnd, 0xDEADC0DE);
1183 // generate handshake packet - 1536 bytes of pseudorandom data
1184 for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++)
1185 tosend[i] = av_lfg_get(&rnd) >> 24;
1187 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1188 /* When the client wants to use RTMPE, we have to change the command
1189 * byte to 0x06 which means to use encrypted data and we have to set
1190 * the flash version to at least 9.0.115.0. */
1197 /* Initialize the Diffie-Hellmann context and generate the public key
1198 * to send to the server. */
1199 if ((ret = ff_rtmpe_gen_pub_key(rt->stream, tosend + 1)) < 0)
1203 client_pos = rtmp_handshake_imprint_with_digest(tosend + 1, rt->encrypted);
1207 if ((ret = ffurl_write(rt->stream, tosend,
1208 RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) {
1209 av_log(s, AV_LOG_ERROR, "Cannot write RTMP handshake request\n");
1213 if ((ret = ffurl_read_complete(rt->stream, serverdata,
1214 RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) {
1215 av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
1219 if ((ret = ffurl_read_complete(rt->stream, clientdata,
1220 RTMP_HANDSHAKE_PACKET_SIZE)) < 0) {
1221 av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
1225 av_log(s, AV_LOG_DEBUG, "Type answer %d\n", serverdata[0]);
1226 av_log(s, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n",
1227 serverdata[5], serverdata[6], serverdata[7], serverdata[8]);
1229 if (rt->is_input && serverdata[5] >= 3) {
1230 server_pos = rtmp_validate_digest(serverdata + 1, 772);
1236 server_pos = rtmp_validate_digest(serverdata + 1, 8);
1241 av_log(s, AV_LOG_ERROR, "Server response validating failed\n");
1242 return AVERROR(EIO);
1246 /* Generate SWFVerification token (SHA256 HMAC hash of decompressed SWF,
1247 * key are the last 32 bytes of the server handshake. */
1249 if ((ret = rtmp_calc_swf_verification(s, rt, serverdata + 1 +
1250 RTMP_HANDSHAKE_PACKET_SIZE - 32)) < 0)
1254 ret = ff_rtmp_calc_digest(tosend + 1 + client_pos, 32, 0,
1255 rtmp_server_key, sizeof(rtmp_server_key),
1260 ret = ff_rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE - 32,
1261 0, digest, 32, signature);
1265 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1266 /* Compute the shared secret key sent by the server and initialize
1267 * the RC4 encryption. */
1268 if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1,
1269 tosend + 1, type)) < 0)
1272 /* Encrypt the signature received by the server. */
1273 ff_rtmpe_encrypt_sig(rt->stream, signature, digest, serverdata[0]);
1276 if (memcmp(signature, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) {
1277 av_log(s, AV_LOG_ERROR, "Signature mismatch\n");
1278 return AVERROR(EIO);
1281 for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++)
1282 tosend[i] = av_lfg_get(&rnd) >> 24;
1283 ret = ff_rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0,
1284 rtmp_player_key, sizeof(rtmp_player_key),
1289 ret = ff_rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0,
1291 tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32);
1295 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1296 /* Encrypt the signature to be send to the server. */
1297 ff_rtmpe_encrypt_sig(rt->stream, tosend +
1298 RTMP_HANDSHAKE_PACKET_SIZE - 32, digest,
1302 // write reply back to the server
1303 if ((ret = ffurl_write(rt->stream, tosend,
1304 RTMP_HANDSHAKE_PACKET_SIZE)) < 0)
1307 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1308 /* Set RC4 keys for encryption and update the keystreams. */
1309 if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0)
1313 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1314 /* Compute the shared secret key sent by the server and initialize
1315 * the RC4 encryption. */
1316 if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1,
1317 tosend + 1, 1)) < 0)
1320 if (serverdata[0] == 9) {
1321 /* Encrypt the signature received by the server. */
1322 ff_rtmpe_encrypt_sig(rt->stream, signature, digest,
1327 if ((ret = ffurl_write(rt->stream, serverdata + 1,
1328 RTMP_HANDSHAKE_PACKET_SIZE)) < 0)
1331 if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
1332 /* Set RC4 keys for encryption and update the keystreams. */
1333 if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0)
1341 static int rtmp_receive_hs_packet(RTMPContext* rt, uint32_t *first_int,
1342 uint32_t *second_int, char *arraydata,
1347 inoutsize = ffurl_read_complete(rt->stream, arraydata,
1348 RTMP_HANDSHAKE_PACKET_SIZE);
1350 return AVERROR(EIO);
1351 if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) {
1352 av_log(rt, AV_LOG_ERROR, "Erroneous Message size %d"
1353 " not following standard\n", (int)inoutsize);
1354 return AVERROR(EINVAL);
1357 *first_int = AV_RB32(arraydata);
1358 *second_int = AV_RB32(arraydata + 4);
1362 static int rtmp_send_hs_packet(RTMPContext* rt, uint32_t first_int,
1363 uint32_t second_int, char *arraydata, int size)
1367 AV_WB32(arraydata, first_int);
1368 AV_WB32(arraydata + 4, second_int);
1369 inoutsize = ffurl_write(rt->stream, arraydata,
1370 RTMP_HANDSHAKE_PACKET_SIZE);
1371 if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) {
1372 av_log(rt, AV_LOG_ERROR, "Unable to write answer\n");
1373 return AVERROR(EIO);
1380 * rtmp handshake server side
1382 static int rtmp_server_handshake(URLContext *s, RTMPContext *rt)
1384 uint8_t buffer[RTMP_HANDSHAKE_PACKET_SIZE];
1386 uint32_t hs_my_epoch;
1387 uint8_t hs_c1[RTMP_HANDSHAKE_PACKET_SIZE];
1388 uint8_t hs_s1[RTMP_HANDSHAKE_PACKET_SIZE];
1395 inoutsize = ffurl_read_complete(rt->stream, buffer, 1); // Receive C0
1396 if (inoutsize <= 0) {
1397 av_log(s, AV_LOG_ERROR, "Unable to read handshake\n");
1398 return AVERROR(EIO);
1401 if (buffer[0] != 3) {
1402 av_log(s, AV_LOG_ERROR, "RTMP protocol version mismatch\n");
1403 return AVERROR(EIO);
1405 if (ffurl_write(rt->stream, buffer, 1) <= 0) { // Send S0
1406 av_log(s, AV_LOG_ERROR,
1407 "Unable to write answer - RTMP S0\n");
1408 return AVERROR(EIO);
1411 ret = rtmp_receive_hs_packet(rt, &hs_epoch, &zeroes, hs_c1,
1412 RTMP_HANDSHAKE_PACKET_SIZE);
1414 av_log(s, AV_LOG_ERROR, "RTMP Handshake C1 Error\n");
1418 /* By now same epoch will be sent */
1419 hs_my_epoch = hs_epoch;
1420 /* Generate random */
1421 for (randomidx = 8; randomidx < (RTMP_HANDSHAKE_PACKET_SIZE);
1423 AV_WB32(hs_s1 + randomidx, av_get_random_seed());
1425 ret = rtmp_send_hs_packet(rt, hs_my_epoch, 0, hs_s1,
1426 RTMP_HANDSHAKE_PACKET_SIZE);
1428 av_log(s, AV_LOG_ERROR, "RTMP Handshake S1 Error\n");
1432 ret = rtmp_send_hs_packet(rt, hs_epoch, 0, hs_c1,
1433 RTMP_HANDSHAKE_PACKET_SIZE);
1435 av_log(s, AV_LOG_ERROR, "RTMP Handshake S2 Error\n");
1439 ret = rtmp_receive_hs_packet(rt, &temp, &zeroes, buffer,
1440 RTMP_HANDSHAKE_PACKET_SIZE);
1442 av_log(s, AV_LOG_ERROR, "RTMP Handshake C2 Error\n");
1445 if (temp != hs_my_epoch)
1446 av_log(s, AV_LOG_WARNING,
1447 "Erroneous C2 Message epoch does not match up with C1 epoch\n");
1448 if (memcmp(buffer + 8, hs_s1 + 8,
1449 RTMP_HANDSHAKE_PACKET_SIZE - 8))
1450 av_log(s, AV_LOG_WARNING,
1451 "Erroneous C2 Message random does not match up\n");
1456 static int handle_chunk_size(URLContext *s, RTMPPacket *pkt)
1458 RTMPContext *rt = s->priv_data;
1461 if (pkt->size < 4) {
1462 av_log(s, AV_LOG_ERROR,
1463 "Too short chunk size change packet (%d)\n",
1465 return AVERROR_INVALIDDATA;
1468 if (!rt->is_input) {
1469 /* Send the same chunk size change packet back to the server,
1470 * setting the outgoing chunk size to the same as the incoming one. */
1471 if ((ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
1472 &rt->prev_pkt[1], &rt->nb_prev_pkt[1])) < 0)
1474 rt->out_chunk_size = AV_RB32(pkt->data);
1477 rt->in_chunk_size = AV_RB32(pkt->data);
1478 if (rt->in_chunk_size <= 0) {
1479 av_log(s, AV_LOG_ERROR, "Incorrect chunk size %d\n",
1481 return AVERROR_INVALIDDATA;
1483 av_log(s, AV_LOG_DEBUG, "New incoming chunk size = %d\n",
1489 static int handle_ping(URLContext *s, RTMPPacket *pkt)
1491 RTMPContext *rt = s->priv_data;
1494 if (pkt->size < 2) {
1495 av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n",
1497 return AVERROR_INVALIDDATA;
1500 t = AV_RB16(pkt->data);
1502 if ((ret = gen_pong(s, rt, pkt)) < 0)
1504 } else if (t == 26) {
1506 if ((ret = gen_swf_verification(s, rt)) < 0)
1509 av_log(s, AV_LOG_WARNING, "Ignoring SWFVerification request.\n");
1516 static int handle_client_bw(URLContext *s, RTMPPacket *pkt)
1518 RTMPContext *rt = s->priv_data;
1520 if (pkt->size < 4) {
1521 av_log(s, AV_LOG_ERROR,
1522 "Client bandwidth report packet is less than 4 bytes long (%d)\n",
1524 return AVERROR_INVALIDDATA;
1527 rt->client_report_size = AV_RB32(pkt->data);
1528 if (rt->client_report_size <= 0) {
1529 av_log(s, AV_LOG_ERROR, "Incorrect client bandwidth %d\n",
1530 rt->client_report_size);
1531 return AVERROR_INVALIDDATA;
1534 av_log(s, AV_LOG_DEBUG, "Client bandwidth = %d\n", rt->client_report_size);
1535 rt->client_report_size >>= 1;
1540 static int handle_server_bw(URLContext *s, RTMPPacket *pkt)
1542 RTMPContext *rt = s->priv_data;
1544 if (pkt->size < 4) {
1545 av_log(s, AV_LOG_ERROR,
1546 "Too short server bandwidth report packet (%d)\n",
1548 return AVERROR_INVALIDDATA;
1551 rt->server_bw = AV_RB32(pkt->data);
1552 if (rt->server_bw <= 0) {
1553 av_log(s, AV_LOG_ERROR, "Incorrect server bandwidth %d\n",
1555 return AVERROR_INVALIDDATA;
1557 av_log(s, AV_LOG_DEBUG, "Server bandwidth = %d\n", rt->server_bw);
1562 static int do_adobe_auth(RTMPContext *rt, const char *user, const char *salt,
1563 const char *opaque, const char *challenge)
1566 char hashstr[AV_BASE64_SIZE(sizeof(hash))], challenge2[10];
1567 struct AVMD5 *md5 = av_md5_alloc();
1569 return AVERROR(ENOMEM);
1571 snprintf(challenge2, sizeof(challenge2), "%08x", av_get_random_seed());
1574 av_md5_update(md5, user, strlen(user));
1575 av_md5_update(md5, salt, strlen(salt));
1576 av_md5_update(md5, rt->password, strlen(rt->password));
1577 av_md5_final(md5, hash);
1578 av_base64_encode(hashstr, sizeof(hashstr), hash,
1581 av_md5_update(md5, hashstr, strlen(hashstr));
1583 av_md5_update(md5, opaque, strlen(opaque));
1585 av_md5_update(md5, challenge, strlen(challenge));
1586 av_md5_update(md5, challenge2, strlen(challenge2));
1587 av_md5_final(md5, hash);
1588 av_base64_encode(hashstr, sizeof(hashstr), hash,
1590 snprintf(rt->auth_params, sizeof(rt->auth_params),
1591 "?authmod=%s&user=%s&challenge=%s&response=%s",
1592 "adobe", user, challenge2, hashstr);
1594 av_strlcatf(rt->auth_params, sizeof(rt->auth_params),
1595 "&opaque=%s", opaque);
1601 static int do_llnw_auth(RTMPContext *rt, const char *user, const char *nonce)
1604 char hashstr1[33], hashstr2[33];
1605 const char *realm = "live";
1606 const char *method = "publish";
1607 const char *qop = "auth";
1608 const char *nc = "00000001";
1610 struct AVMD5 *md5 = av_md5_alloc();
1612 return AVERROR(ENOMEM);
1614 snprintf(cnonce, sizeof(cnonce), "%08x", av_get_random_seed());
1617 av_md5_update(md5, user, strlen(user));
1618 av_md5_update(md5, ":", 1);
1619 av_md5_update(md5, realm, strlen(realm));
1620 av_md5_update(md5, ":", 1);
1621 av_md5_update(md5, rt->password, strlen(rt->password));
1622 av_md5_final(md5, hash);
1623 ff_data_to_hex(hashstr1, hash, 16, 1);
1624 hashstr1[32] = '\0';
1627 av_md5_update(md5, method, strlen(method));
1628 av_md5_update(md5, ":/", 2);
1629 av_md5_update(md5, rt->app, strlen(rt->app));
1630 if (!strchr(rt->app, '/'))
1631 av_md5_update(md5, "/_definst_", strlen("/_definst_"));
1632 av_md5_final(md5, hash);
1633 ff_data_to_hex(hashstr2, hash, 16, 1);
1634 hashstr2[32] = '\0';
1637 av_md5_update(md5, hashstr1, strlen(hashstr1));
1638 av_md5_update(md5, ":", 1);
1640 av_md5_update(md5, nonce, strlen(nonce));
1641 av_md5_update(md5, ":", 1);
1642 av_md5_update(md5, nc, strlen(nc));
1643 av_md5_update(md5, ":", 1);
1644 av_md5_update(md5, cnonce, strlen(cnonce));
1645 av_md5_update(md5, ":", 1);
1646 av_md5_update(md5, qop, strlen(qop));
1647 av_md5_update(md5, ":", 1);
1648 av_md5_update(md5, hashstr2, strlen(hashstr2));
1649 av_md5_final(md5, hash);
1650 ff_data_to_hex(hashstr1, hash, 16, 1);
1652 snprintf(rt->auth_params, sizeof(rt->auth_params),
1653 "?authmod=%s&user=%s&nonce=%s&cnonce=%s&nc=%s&response=%s",
1654 "llnw", user, nonce, cnonce, nc, hashstr1);
1660 static int handle_connect_error(URLContext *s, const char *desc)
1662 RTMPContext *rt = s->priv_data;
1663 char buf[300], *ptr, authmod[15];
1665 const char *user = "", *salt = "", *opaque = NULL,
1666 *challenge = NULL, *cptr = NULL, *nonce = NULL;
1668 if (!(cptr = strstr(desc, "authmod=adobe")) &&
1669 !(cptr = strstr(desc, "authmod=llnw"))) {
1670 av_log(s, AV_LOG_ERROR,
1671 "Unknown connect error (unsupported authentication method?)\n");
1672 return AVERROR_UNKNOWN;
1674 cptr += strlen("authmod=");
1675 while (*cptr && *cptr != ' ' && i < sizeof(authmod) - 1)
1676 authmod[i++] = *cptr++;
1679 if (!rt->username[0] || !rt->password[0]) {
1680 av_log(s, AV_LOG_ERROR, "No credentials set\n");
1681 return AVERROR_UNKNOWN;
1684 if (strstr(desc, "?reason=authfailed")) {
1685 av_log(s, AV_LOG_ERROR, "Incorrect username/password\n");
1686 return AVERROR_UNKNOWN;
1687 } else if (strstr(desc, "?reason=nosuchuser")) {
1688 av_log(s, AV_LOG_ERROR, "Incorrect username\n");
1689 return AVERROR_UNKNOWN;
1692 if (rt->auth_tried) {
1693 av_log(s, AV_LOG_ERROR, "Authentication failed\n");
1694 return AVERROR_UNKNOWN;
1697 rt->auth_params[0] = '\0';
1699 if (strstr(desc, "code=403 need auth")) {
1700 snprintf(rt->auth_params, sizeof(rt->auth_params),
1701 "?authmod=%s&user=%s", authmod, rt->username);
1705 if (!(cptr = strstr(desc, "?reason=needauth"))) {
1706 av_log(s, AV_LOG_ERROR, "No auth parameters found\n");
1707 return AVERROR_UNKNOWN;
1710 av_strlcpy(buf, cptr + 1, sizeof(buf));
1714 char *next = strchr(ptr, '&');
1715 char *value = strchr(ptr, '=');
1720 if (!strcmp(ptr, "user")) {
1722 } else if (!strcmp(ptr, "salt")) {
1724 } else if (!strcmp(ptr, "opaque")) {
1726 } else if (!strcmp(ptr, "challenge")) {
1728 } else if (!strcmp(ptr, "nonce")) {
1731 av_log(s, AV_LOG_INFO, "Ignoring unsupported var %s\n", ptr);
1734 av_log(s, AV_LOG_WARNING, "Variable %s has NULL value\n", ptr);
1739 if (!strcmp(authmod, "adobe")) {
1740 if ((ret = do_adobe_auth(rt, user, salt, opaque, challenge)) < 0)
1743 if ((ret = do_llnw_auth(rt, user, nonce)) < 0)
1751 static int handle_invoke_error(URLContext *s, RTMPPacket *pkt)
1753 RTMPContext *rt = s->priv_data;
1754 const uint8_t *data_end = pkt->data + pkt->size;
1755 char *tracked_method = NULL;
1756 int level = AV_LOG_ERROR;
1757 uint8_t tmpstr[256];
1760 if ((ret = find_tracked_method(s, pkt, 9, &tracked_method)) < 0)
1763 if (!ff_amf_get_field_value(pkt->data + 9, data_end,
1764 "description", tmpstr, sizeof(tmpstr))) {
1765 if (tracked_method && (!strcmp(tracked_method, "_checkbw") ||
1766 !strcmp(tracked_method, "releaseStream") ||
1767 !strcmp(tracked_method, "FCSubscribe") ||
1768 !strcmp(tracked_method, "FCPublish"))) {
1769 /* Gracefully ignore Adobe-specific historical artifact errors. */
1770 level = AV_LOG_WARNING;
1772 } else if (tracked_method && !strcmp(tracked_method, "connect")) {
1773 ret = handle_connect_error(s, tmpstr);
1775 rt->do_reconnect = 1;
1776 level = AV_LOG_VERBOSE;
1779 ret = AVERROR_UNKNOWN;
1780 av_log(s, level, "Server error: %s\n", tmpstr);
1783 av_free(tracked_method);
1787 static int write_begin(URLContext *s)
1789 RTMPContext *rt = s->priv_data;
1791 RTMPPacket spkt = { 0 };
1794 // Send Stream Begin 1
1795 if ((ret = ff_rtmp_packet_create(&spkt, RTMP_NETWORK_CHANNEL,
1796 RTMP_PT_PING, 0, 6)) < 0) {
1797 av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
1801 bytestream2_init_writer(&pbc, spkt.data, spkt.size);
1802 bytestream2_put_be16(&pbc, 0); // 0 -> Stream Begin
1803 bytestream2_put_be32(&pbc, rt->nb_streamid);
1805 ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1806 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
1808 ff_rtmp_packet_destroy(&spkt);
1813 static int write_status(URLContext *s, RTMPPacket *pkt,
1814 const char *status, const char *filename)
1816 RTMPContext *rt = s->priv_data;
1817 RTMPPacket spkt = { 0 };
1818 char statusmsg[128];
1822 if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
1824 RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
1825 av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
1830 spkt.extra = pkt->extra;
1831 ff_amf_write_string(&pp, "onStatus");
1832 ff_amf_write_number(&pp, 0);
1833 ff_amf_write_null(&pp);
1835 ff_amf_write_object_start(&pp);
1836 ff_amf_write_field_name(&pp, "level");
1837 ff_amf_write_string(&pp, "status");
1838 ff_amf_write_field_name(&pp, "code");
1839 ff_amf_write_string(&pp, status);
1840 ff_amf_write_field_name(&pp, "description");
1841 snprintf(statusmsg, sizeof(statusmsg),
1842 "%s is now published", filename);
1843 ff_amf_write_string(&pp, statusmsg);
1844 ff_amf_write_field_name(&pp, "details");
1845 ff_amf_write_string(&pp, filename);
1846 ff_amf_write_field_name(&pp, "clientid");
1847 snprintf(statusmsg, sizeof(statusmsg), "%s", LIBAVFORMAT_IDENT);
1848 ff_amf_write_string(&pp, statusmsg);
1849 ff_amf_write_object_end(&pp);
1851 spkt.size = pp - spkt.data;
1852 ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1853 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
1854 ff_rtmp_packet_destroy(&spkt);
1859 static int send_invoke_response(URLContext *s, RTMPPacket *pkt)
1861 RTMPContext *rt = s->priv_data;
1867 const uint8_t *p = pkt->data;
1869 RTMPPacket spkt = { 0 };
1873 bytestream2_init(&gbc, p, pkt->size);
1874 if (ff_amf_read_string(&gbc, command, sizeof(command),
1876 av_log(s, AV_LOG_ERROR, "Error in PT_INVOKE\n");
1877 return AVERROR_INVALIDDATA;
1880 ret = ff_amf_read_number(&gbc, &seqnum);
1883 ret = ff_amf_read_null(&gbc);
1886 if (!strcmp(command, "FCPublish") ||
1887 !strcmp(command, "publish")) {
1888 ret = ff_amf_read_string(&gbc, filename,
1889 sizeof(filename), &stringlen);
1892 pchar = strrchr(s->filename, '/');
1894 av_log(s, AV_LOG_WARNING,
1895 "Unable to find / in url %s, bad format\n",
1897 pchar = s->filename;
1900 if (strcmp(pchar, filename))
1901 av_log(s, AV_LOG_WARNING, "Unexpected stream %s, expecting"
1902 " %s\n", filename, pchar);
1904 rt->state = STATE_RECEIVING;
1907 if (!strcmp(command, "FCPublish")) {
1908 if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
1910 RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
1911 av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
1915 ff_amf_write_string(&pp, "onFCPublish");
1916 } else if (!strcmp(command, "publish")) {
1917 ret = write_begin(s);
1921 // Send onStatus(NetStream.Publish.Start)
1922 return write_status(s, pkt, "NetStream.Publish.Start",
1924 } else if (!strcmp(command, "play")) {
1925 ret = write_begin(s);
1928 rt->state = STATE_SENDING;
1929 return write_status(s, pkt, "NetStream.Play.Start",
1932 if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
1934 RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
1935 av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
1939 ff_amf_write_string(&pp, "_result");
1940 ff_amf_write_number(&pp, seqnum);
1941 ff_amf_write_null(&pp);
1942 if (!strcmp(command, "createStream")) {
1944 if (rt->nb_streamid == 0 || rt->nb_streamid == 2)
1945 rt->nb_streamid++; /* Values 0 and 2 are reserved */
1946 ff_amf_write_number(&pp, rt->nb_streamid);
1947 /* By now we don't control which streams are removed in
1948 * deleteStream. There is no stream creation control
1949 * if a client creates more than 2^32 - 2 streams. */
1952 spkt.size = pp - spkt.data;
1953 ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1954 &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
1955 ff_rtmp_packet_destroy(&spkt);
1959 static int handle_invoke_result(URLContext *s, RTMPPacket *pkt)
1961 RTMPContext *rt = s->priv_data;
1962 char *tracked_method = NULL;
1965 if ((ret = find_tracked_method(s, pkt, 10, &tracked_method)) < 0)
1968 if (!tracked_method) {
1969 /* Ignore this reply when the current method is not tracked. */
1973 if (!strcmp(tracked_method, "connect")) {
1974 if (!rt->is_input) {
1975 if ((ret = gen_release_stream(s, rt)) < 0)
1978 if ((ret = gen_fcpublish_stream(s, rt)) < 0)
1981 if ((ret = gen_server_bw(s, rt)) < 0)
1985 if ((ret = gen_create_stream(s, rt)) < 0)
1989 /* Send the FCSubscribe command when the name of live
1990 * stream is defined by the user or if it's a live stream. */
1991 if (rt->subscribe) {
1992 if ((ret = gen_fcsubscribe_stream(s, rt, rt->subscribe)) < 0)
1994 } else if (rt->live == -1) {
1995 if ((ret = gen_fcsubscribe_stream(s, rt, rt->playpath)) < 0)
1999 } else if (!strcmp(tracked_method, "createStream")) {
2000 //extract a number from the result
2001 if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) {
2002 av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n");
2004 rt->stream_id = av_int2double(AV_RB64(pkt->data + 21));
2007 if (!rt->is_input) {
2008 if ((ret = gen_publish(s, rt)) < 0)
2011 if ((ret = gen_play(s, rt)) < 0)
2013 if ((ret = gen_buffer_time(s, rt)) < 0)
2019 av_free(tracked_method);
2023 static int handle_invoke_status(URLContext *s, RTMPPacket *pkt)
2025 RTMPContext *rt = s->priv_data;
2026 const uint8_t *data_end = pkt->data + pkt->size;
2027 const uint8_t *ptr = pkt->data + RTMP_HEADER;
2028 uint8_t tmpstr[256];
2031 for (i = 0; i < 2; i++) {
2032 t = ff_amf_tag_size(ptr, data_end);
2038 t = ff_amf_get_field_value(ptr, data_end, "level", tmpstr, sizeof(tmpstr));
2039 if (!t && !strcmp(tmpstr, "error")) {
2040 t = ff_amf_get_field_value(ptr, data_end,
2041 "description", tmpstr, sizeof(tmpstr));
2042 if (t || !tmpstr[0])
2043 t = ff_amf_get_field_value(ptr, data_end, "code",
2044 tmpstr, sizeof(tmpstr));
2046 av_log(s, AV_LOG_ERROR, "Server error: %s\n", tmpstr);
2050 t = ff_amf_get_field_value(ptr, data_end, "code", tmpstr, sizeof(tmpstr));
2051 if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING;
2052 if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED;
2053 if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED;
2054 if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING;
2055 if (!t && !strcmp(tmpstr, "NetStream.Seek.Notify")) rt->state = STATE_PLAYING;
2060 static int handle_invoke(URLContext *s, RTMPPacket *pkt)
2062 RTMPContext *rt = s->priv_data;
2065 //TODO: check for the messages sent for wrong state?
2066 if (ff_amf_match_string(pkt->data, pkt->size, "_error")) {
2067 if ((ret = handle_invoke_error(s, pkt)) < 0)
2069 } else if (ff_amf_match_string(pkt->data, pkt->size, "_result")) {
2070 if ((ret = handle_invoke_result(s, pkt)) < 0)
2072 } else if (ff_amf_match_string(pkt->data, pkt->size, "onStatus")) {
2073 if ((ret = handle_invoke_status(s, pkt)) < 0)
2075 } else if (ff_amf_match_string(pkt->data, pkt->size, "onBWDone")) {
2076 if ((ret = gen_check_bw(s, rt)) < 0)
2078 } else if (ff_amf_match_string(pkt->data, pkt->size, "releaseStream") ||
2079 ff_amf_match_string(pkt->data, pkt->size, "FCPublish") ||
2080 ff_amf_match_string(pkt->data, pkt->size, "publish") ||
2081 ff_amf_match_string(pkt->data, pkt->size, "play") ||
2082 ff_amf_match_string(pkt->data, pkt->size, "_checkbw") ||
2083 ff_amf_match_string(pkt->data, pkt->size, "createStream")) {
2084 if ((ret = send_invoke_response(s, pkt)) < 0)
2091 static int update_offset(RTMPContext *rt, int size)
2095 // generate packet header and put data into buffer for FLV demuxer
2096 if (rt->flv_off < rt->flv_size) {
2097 // There is old unread data in the buffer, thus append at the end
2098 old_flv_size = rt->flv_size;
2099 rt->flv_size += size;
2101 // All data has been read, write the new data at the start of the buffer
2103 rt->flv_size = size;
2107 return old_flv_size;
2110 static int append_flv_data(RTMPContext *rt, RTMPPacket *pkt, int skip)
2112 int old_flv_size, ret;
2114 const uint8_t *data = pkt->data + skip;
2115 const int size = pkt->size - skip;
2116 uint32_t ts = pkt->timestamp;
2118 if (pkt->type == RTMP_PT_AUDIO) {
2120 } else if (pkt->type == RTMP_PT_VIDEO) {
2124 old_flv_size = update_offset(rt, size + 15);
2126 if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) {
2127 rt->flv_size = rt->flv_off = 0;
2130 bytestream2_init_writer(&pbc, rt->flv_data, rt->flv_size);
2131 bytestream2_skip_p(&pbc, old_flv_size);
2132 bytestream2_put_byte(&pbc, pkt->type);
2133 bytestream2_put_be24(&pbc, size);
2134 bytestream2_put_be24(&pbc, ts);
2135 bytestream2_put_byte(&pbc, ts >> 24);
2136 bytestream2_put_be24(&pbc, 0);
2137 bytestream2_put_buffer(&pbc, data, size);
2138 bytestream2_put_be32(&pbc, 0);
2143 static int handle_notify(URLContext *s, RTMPPacket *pkt)
2145 RTMPContext *rt = s->priv_data;
2146 uint8_t commandbuffer[64];
2147 char statusmsg[128];
2148 int stringlen, ret, skip = 0;
2151 bytestream2_init(&gbc, pkt->data, pkt->size);
2152 if (ff_amf_read_string(&gbc, commandbuffer, sizeof(commandbuffer),
2154 return AVERROR_INVALIDDATA;
2156 if (!strcmp(commandbuffer, "onMetaData")) {
2157 // metadata properties should be stored in a mixed array
2158 if (bytestream2_get_byte(&gbc) == AMF_DATA_TYPE_MIXEDARRAY) {
2159 // We have found a metaData Array so flv can determine the streams
2161 rt->received_metadata = 1;
2162 // skip 32-bit max array index
2163 bytestream2_skip(&gbc, 4);
2164 while (bytestream2_get_bytes_left(&gbc) > 3) {
2165 if (ff_amf_get_string(&gbc, statusmsg, sizeof(statusmsg),
2167 return AVERROR_INVALIDDATA;
2168 // We do not care about the content of the property (yet).
2169 stringlen = ff_amf_tag_size(gbc.buffer, gbc.buffer_end);
2171 return AVERROR_INVALIDDATA;
2172 bytestream2_skip(&gbc, stringlen);
2174 // The presence of the following properties indicates that the
2175 // respective streams are present.
2176 if (!strcmp(statusmsg, "videocodecid")) {
2179 if (!strcmp(statusmsg, "audiocodecid")) {
2183 if (bytestream2_get_be24(&gbc) != AMF_END_OF_OBJECT)
2184 return AVERROR_INVALIDDATA;
2188 // Skip the @setDataFrame string and validate it is a notification
2189 if (!strcmp(commandbuffer, "@setDataFrame")) {
2190 skip = gbc.buffer - pkt->data;
2191 ret = ff_amf_read_string(&gbc, statusmsg,
2192 sizeof(statusmsg), &stringlen);
2194 return AVERROR_INVALIDDATA;
2197 return append_flv_data(rt, pkt, skip);
2201 * Parse received packet and possibly perform some action depending on
2202 * the packet contents.
2203 * @return 0 for no errors, negative values for serious errors which prevent
2204 * further communications, positive values for uncritical errors
2206 static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
2211 ff_rtmp_packet_dump(s, pkt);
2214 switch (pkt->type) {
2215 case RTMP_PT_BYTES_READ:
2216 av_dlog(s, "received bytes read report\n");
2218 case RTMP_PT_CHUNK_SIZE:
2219 if ((ret = handle_chunk_size(s, pkt)) < 0)
2223 if ((ret = handle_ping(s, pkt)) < 0)
2226 case RTMP_PT_CLIENT_BW:
2227 if ((ret = handle_client_bw(s, pkt)) < 0)
2230 case RTMP_PT_SERVER_BW:
2231 if ((ret = handle_server_bw(s, pkt)) < 0)
2234 case RTMP_PT_INVOKE:
2235 if ((ret = handle_invoke(s, pkt)) < 0)
2240 case RTMP_PT_METADATA:
2241 case RTMP_PT_NOTIFY:
2242 /* Audio, Video and Metadata packets are parsed in get_packet() */
2245 av_log(s, AV_LOG_VERBOSE, "Unknown packet type received 0x%02X\n", pkt->type);
2251 static int handle_metadata(RTMPContext *rt, RTMPPacket *pkt)
2253 int ret, old_flv_size, type;
2254 const uint8_t *next;
2257 uint32_t ts, cts, pts = 0;
2259 old_flv_size = update_offset(rt, pkt->size);
2261 if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) {
2262 rt->flv_size = rt->flv_off = 0;
2267 p = rt->flv_data + old_flv_size;
2269 /* copy data while rewriting timestamps */
2270 ts = pkt->timestamp;
2272 while (next - pkt->data < pkt->size - RTMP_HEADER) {
2273 type = bytestream_get_byte(&next);
2274 size = bytestream_get_be24(&next);
2275 cts = bytestream_get_be24(&next);
2276 cts |= bytestream_get_byte(&next) << 24;
2281 if (size + 3 + 4 > pkt->data + pkt->size - next)
2283 bytestream_put_byte(&p, type);
2284 bytestream_put_be24(&p, size);
2285 bytestream_put_be24(&p, ts);
2286 bytestream_put_byte(&p, ts >> 24);
2287 memcpy(p, next, size + 3 + 4);
2288 next += size + 3 + 4;
2291 if (p != rt->flv_data + rt->flv_size) {
2292 av_log(NULL, AV_LOG_WARNING, "Incomplete flv packets in "
2293 "RTMP_PT_METADATA packet\n");
2294 rt->flv_size = p - rt->flv_data;
2301 * Interact with the server by receiving and sending RTMP packets until
2302 * there is some significant data (media data or expected status notification).
2304 * @param s reading context
2305 * @param for_header non-zero value tells function to work until it
2306 * gets notification from the server that playing has been started,
2307 * otherwise function will work until some media data is received (or
2309 * @return 0 for successful operation, negative value in case of error
2311 static int get_packet(URLContext *s, int for_header)
2313 RTMPContext *rt = s->priv_data;
2316 if (rt->state == STATE_STOPPED)
2320 RTMPPacket rpkt = { 0 };
2321 if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt,
2322 rt->in_chunk_size, &rt->prev_pkt[0],
2323 &rt->nb_prev_pkt[0])) <= 0) {
2325 return AVERROR(EAGAIN);
2327 return AVERROR(EIO);
2330 rt->bytes_read += ret;
2331 if (rt->bytes_read - rt->last_bytes_read > rt->client_report_size) {
2332 av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n");
2333 if ((ret = gen_bytes_read(s, rt, rpkt.timestamp + 1)) < 0)
2335 rt->last_bytes_read = rt->bytes_read;
2338 ret = rtmp_parse_result(s, rt, &rpkt);
2340 // At this point we must check if we are in the seek state and continue
2341 // with the next packet. handle_invoke will get us out of this state
2342 // when the right message is encountered
2343 if (rt->state == STATE_SEEKING) {
2344 ff_rtmp_packet_destroy(&rpkt);
2345 // We continue, let the natural flow of things happen:
2346 // AVERROR(EAGAIN) or handle_invoke gets us out of here
2350 if (ret < 0) {//serious error in current packet
2351 ff_rtmp_packet_destroy(&rpkt);
2354 if (rt->do_reconnect && for_header) {
2355 ff_rtmp_packet_destroy(&rpkt);
2358 if (rt->state == STATE_STOPPED) {
2359 ff_rtmp_packet_destroy(&rpkt);
2362 if (for_header && (rt->state == STATE_PLAYING ||
2363 rt->state == STATE_PUBLISHING ||
2364 rt->state == STATE_SENDING ||
2365 rt->state == STATE_RECEIVING)) {
2366 ff_rtmp_packet_destroy(&rpkt);
2369 if (!rpkt.size || !rt->is_input) {
2370 ff_rtmp_packet_destroy(&rpkt);
2373 if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO) {
2374 ret = append_flv_data(rt, &rpkt, 0);
2375 ff_rtmp_packet_destroy(&rpkt);
2377 } else if (rpkt.type == RTMP_PT_NOTIFY) {
2378 ret = handle_notify(s, &rpkt);
2379 ff_rtmp_packet_destroy(&rpkt);
2381 } else if (rpkt.type == RTMP_PT_METADATA) {
2382 ret = handle_metadata(rt, &rpkt);
2383 ff_rtmp_packet_destroy(&rpkt);
2386 ff_rtmp_packet_destroy(&rpkt);
2390 static int rtmp_close(URLContext *h)
2392 RTMPContext *rt = h->priv_data;
2395 if (!rt->is_input) {
2396 rt->flv_data = NULL;
2397 if (rt->out_pkt.size)
2398 ff_rtmp_packet_destroy(&rt->out_pkt);
2399 if (rt->state > STATE_FCPUBLISH)
2400 ret = gen_fcunpublish_stream(h, rt);
2402 if (rt->state > STATE_HANDSHAKED)
2403 ret = gen_delete_stream(h, rt);
2404 for (i = 0; i < 2; i++) {
2405 for (j = 0; j < rt->nb_prev_pkt[i]; j++)
2406 ff_rtmp_packet_destroy(&rt->prev_pkt[i][j]);
2407 av_freep(&rt->prev_pkt[i]);
2410 free_tracked_methods(rt);
2411 av_freep(&rt->flv_data);
2412 ffurl_close(rt->stream);
2417 * Open RTMP connection and verify that the stream can be played.
2419 * URL syntax: rtmp://server[:port][/app][/playpath]
2420 * where 'app' is first one or two directories in the path
2421 * (e.g. /ondemand/, /flash/live/, etc.)
2422 * and 'playpath' is a file name (the rest of the path,
2423 * may be prefixed with "mp4:")
2425 static int rtmp_open(URLContext *s, const char *uri, int flags)
2427 RTMPContext *rt = s->priv_data;
2428 char proto[8], hostname[256], path[1024], auth[100], *fname;
2429 char *old_app, *qmark, fname_buffer[1024];
2432 AVDictionary *opts = NULL;
2435 if (rt->listen_timeout > 0)
2438 rt->is_input = !(flags & AVIO_FLAG_WRITE);
2440 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
2441 hostname, sizeof(hostname), &port,
2442 path, sizeof(path), s->filename);
2444 if (strchr(path, ' ')) {
2445 av_log(s, AV_LOG_WARNING,
2446 "Detected librtmp style URL parameters, these aren't supported "
2447 "by the libavformat internal RTMP handler currently enabled. "
2448 "See the documentation for the correct way to pass parameters.\n");
2452 char *ptr = strchr(auth, ':');
2455 av_strlcpy(rt->username, auth, sizeof(rt->username));
2456 av_strlcpy(rt->password, ptr + 1, sizeof(rt->password));
2460 if (rt->listen && strcmp(proto, "rtmp")) {
2461 av_log(s, AV_LOG_ERROR, "rtmp_listen not available for %s\n",
2463 return AVERROR(EINVAL);
2465 if (!strcmp(proto, "rtmpt") || !strcmp(proto, "rtmpts")) {
2466 if (!strcmp(proto, "rtmpts"))
2467 av_dict_set(&opts, "ffrtmphttp_tls", "1", 1);
2469 /* open the http tunneling connection */
2470 ff_url_join(buf, sizeof(buf), "ffrtmphttp", NULL, hostname, port, NULL);
2471 } else if (!strcmp(proto, "rtmps")) {
2472 /* open the tls connection */
2474 port = RTMPS_DEFAULT_PORT;
2475 ff_url_join(buf, sizeof(buf), "tls", NULL, hostname, port, NULL);
2476 } else if (!strcmp(proto, "rtmpe") || (!strcmp(proto, "rtmpte"))) {
2477 if (!strcmp(proto, "rtmpte"))
2478 av_dict_set(&opts, "ffrtmpcrypt_tunneling", "1", 1);
2480 /* open the encrypted connection */
2481 ff_url_join(buf, sizeof(buf), "ffrtmpcrypt", NULL, hostname, port, NULL);
2484 /* open the tcp connection */
2486 port = RTMP_DEFAULT_PORT;
2488 ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port,
2489 "?listen&listen_timeout=%d",
2490 rt->listen_timeout * 1000);
2492 ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
2496 if ((ret = ffurl_open(&rt->stream, buf, AVIO_FLAG_READ_WRITE,
2497 &s->interrupt_callback, &opts)) < 0) {
2498 av_log(s , AV_LOG_ERROR, "Cannot open connection %s\n", buf);
2502 if (rt->swfverify) {
2503 if ((ret = rtmp_calc_swfhash(s)) < 0)
2507 rt->state = STATE_START;
2508 if (!rt->listen && (ret = rtmp_handshake(s, rt)) < 0)
2510 if (rt->listen && (ret = rtmp_server_handshake(s, rt)) < 0)
2513 rt->out_chunk_size = 128;
2514 rt->in_chunk_size = 128; // Probably overwritten later
2515 rt->state = STATE_HANDSHAKED;
2517 // Keep the application name when it has been defined by the user.
2520 rt->app = av_malloc(APP_MAX_LENGTH);
2522 ret = AVERROR(ENOMEM);
2526 //extract "app" part from path
2527 qmark = strchr(path, '?');
2528 if (qmark && strstr(qmark, "slist=")) {
2530 // After slist we have the playpath, before the params, the app
2531 av_strlcpy(rt->app, path + 1, FFMIN(qmark - path, APP_MAX_LENGTH));
2532 fname = strstr(path, "slist=") + 6;
2533 // Strip any further query parameters from fname
2534 amp = strchr(fname, '&');
2536 av_strlcpy(fname_buffer, fname, FFMIN(amp - fname + 1,
2537 sizeof(fname_buffer)));
2538 fname = fname_buffer;
2540 } else if (!strncmp(path, "/ondemand/", 10)) {
2542 memcpy(rt->app, "ondemand", 9);
2544 char *next = *path ? path + 1 : path;
2545 char *p = strchr(next, '/');
2550 // make sure we do not mismatch a playpath for an application instance
2551 char *c = strchr(p + 1, ':');
2552 fname = strchr(p + 1, '/');
2553 if (!fname || (c && c < fname)) {
2555 av_strlcpy(rt->app, path + 1, FFMIN(p - path, APP_MAX_LENGTH));
2558 av_strlcpy(rt->app, path + 1, FFMIN(fname - path - 1, APP_MAX_LENGTH));
2564 // The name of application has been defined by the user, override it.
2565 if (strlen(old_app) >= APP_MAX_LENGTH) {
2566 ret = AVERROR(EINVAL);
2573 if (!rt->playpath) {
2574 int len = strlen(fname);
2576 rt->playpath = av_malloc(PLAYPATH_MAX_LENGTH);
2577 if (!rt->playpath) {
2578 ret = AVERROR(ENOMEM);
2582 if (!strchr(fname, ':') && len >= 4 &&
2583 (!strcmp(fname + len - 4, ".f4v") ||
2584 !strcmp(fname + len - 4, ".mp4"))) {
2585 memcpy(rt->playpath, "mp4:", 5);
2587 if (len >= 4 && !strcmp(fname + len - 4, ".flv"))
2588 fname[len - 4] = '\0';
2589 rt->playpath[0] = 0;
2591 av_strlcat(rt->playpath, fname, PLAYPATH_MAX_LENGTH);
2595 rt->tcurl = av_malloc(TCURL_MAX_LENGTH);
2597 ret = AVERROR(ENOMEM);
2600 ff_url_join(rt->tcurl, TCURL_MAX_LENGTH, proto, NULL, hostname,
2601 port, "/%s", rt->app);
2604 if (!rt->flashver) {
2605 rt->flashver = av_malloc(FLASHVER_MAX_LENGTH);
2606 if (!rt->flashver) {
2607 ret = AVERROR(ENOMEM);
2611 snprintf(rt->flashver, FLASHVER_MAX_LENGTH, "%s %d,%d,%d,%d",
2612 RTMP_CLIENT_PLATFORM, RTMP_CLIENT_VER1, RTMP_CLIENT_VER2,
2613 RTMP_CLIENT_VER3, RTMP_CLIENT_VER4);
2615 snprintf(rt->flashver, FLASHVER_MAX_LENGTH,
2616 "FMLE/3.0 (compatible; %s)", LIBAVFORMAT_IDENT);
2620 rt->client_report_size = 1048576;
2624 rt->received_metadata = 0;
2625 rt->last_bytes_read = 0;
2626 rt->server_bw = 2500000;
2628 av_log(s, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n",
2629 proto, path, rt->app, rt->playpath);
2631 if ((ret = gen_connect(s, rt)) < 0)
2634 if ((ret = read_connect(s, s->priv_data)) < 0)
2639 ret = get_packet(s, 1);
2640 } while (ret == AVERROR(EAGAIN));
2644 if (rt->do_reconnect) {
2646 ffurl_close(rt->stream);
2648 rt->do_reconnect = 0;
2650 for (i = 0; i < 2; i++)
2651 memset(rt->prev_pkt[i], 0,
2652 sizeof(**rt->prev_pkt) * rt->nb_prev_pkt[i]);
2653 free_tracked_methods(rt);
2659 // generate FLV header for demuxer
2661 if ((err = av_reallocp(&rt->flv_data, rt->flv_size)) < 0)
2664 memcpy(rt->flv_data, "FLV\1\0\0\0\0\011\0\0\0\0", rt->flv_size);
2666 // Read packets until we reach the first A/V packet or read metadata.
2667 // If there was a metadata package in front of the A/V packets, we can
2668 // build the FLV header from this. If we do not receive any metadata,
2669 // the FLV decoder will allocate the needed streams when their first
2670 // audio or video packet arrives.
2671 while (!rt->has_audio && !rt->has_video && !rt->received_metadata) {
2672 if ((ret = get_packet(s, 0)) < 0)
2676 // Either after we have read the metadata or (if there is none) the
2677 // first packet of an A/V stream, we have a better knowledge about the
2678 // streams, so set the FLV header accordingly.
2679 if (rt->has_audio) {
2680 rt->flv_data[4] |= FLV_HEADER_FLAG_HASAUDIO;
2682 if (rt->has_video) {
2683 rt->flv_data[4] |= FLV_HEADER_FLAG_HASVIDEO;
2687 rt->flv_data = NULL;
2689 rt->skip_bytes = 13;
2692 s->max_packet_size = rt->stream->max_packet_size;
2697 av_dict_free(&opts);
2702 static int rtmp_read(URLContext *s, uint8_t *buf, int size)
2704 RTMPContext *rt = s->priv_data;
2705 int orig_size = size;
2709 int data_left = rt->flv_size - rt->flv_off;
2711 if (data_left >= size) {
2712 memcpy(buf, rt->flv_data + rt->flv_off, size);
2713 rt->flv_off += size;
2716 if (data_left > 0) {
2717 memcpy(buf, rt->flv_data + rt->flv_off, data_left);
2720 rt->flv_off = rt->flv_size;
2723 if ((ret = get_packet(s, 0)) < 0)
2729 static int64_t rtmp_seek(URLContext *s, int stream_index, int64_t timestamp,
2732 RTMPContext *rt = s->priv_data;
2734 av_log(s, AV_LOG_DEBUG,
2735 "Seek on stream index %d at timestamp %"PRId64" with flags %08x\n",
2736 stream_index, timestamp, flags);
2737 if ((ret = gen_seek(s, rt, timestamp)) < 0) {
2738 av_log(s, AV_LOG_ERROR,
2739 "Unable to send seek command on stream index %d at timestamp "
2740 "%"PRId64" with flags %08x\n",
2741 stream_index, timestamp, flags);
2744 rt->flv_off = rt->flv_size;
2745 rt->state = STATE_SEEKING;
2749 static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
2751 RTMPContext *rt = s->priv_data;
2752 int size_temp = size;
2753 int pktsize, pkttype;
2755 const uint8_t *buf_temp = buf;
2760 if (rt->skip_bytes) {
2761 int skip = FFMIN(rt->skip_bytes, size_temp);
2764 rt->skip_bytes -= skip;
2768 if (rt->flv_header_bytes < RTMP_HEADER) {
2769 const uint8_t *header = rt->flv_header;
2770 int copy = FFMIN(RTMP_HEADER - rt->flv_header_bytes, size_temp);
2771 int channel = RTMP_AUDIO_CHANNEL;
2772 bytestream_get_buffer(&buf_temp, rt->flv_header + rt->flv_header_bytes, copy);
2773 rt->flv_header_bytes += copy;
2775 if (rt->flv_header_bytes < RTMP_HEADER)
2778 pkttype = bytestream_get_byte(&header);
2779 pktsize = bytestream_get_be24(&header);
2780 ts = bytestream_get_be24(&header);
2781 ts |= bytestream_get_byte(&header) << 24;
2782 bytestream_get_be24(&header);
2783 rt->flv_size = pktsize;
2785 if (pkttype == RTMP_PT_VIDEO)
2786 channel = RTMP_VIDEO_CHANNEL;
2788 //force 12bytes header
2789 if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) ||
2790 pkttype == RTMP_PT_NOTIFY) {
2791 if (pkttype == RTMP_PT_NOTIFY)
2793 if ((ret = ff_rtmp_check_alloc_array(&rt->prev_pkt[1],
2794 &rt->nb_prev_pkt[1],
2797 rt->prev_pkt[1][channel].channel_id = 0;
2800 //this can be a big packet, it's better to send it right here
2801 if ((ret = ff_rtmp_packet_create(&rt->out_pkt, channel,
2802 pkttype, ts, pktsize)) < 0)
2805 rt->out_pkt.extra = rt->stream_id;
2806 rt->flv_data = rt->out_pkt.data;
2808 if (pkttype == RTMP_PT_NOTIFY)
2809 ff_amf_write_string(&rt->flv_data, "@setDataFrame");
2812 if (rt->flv_size - rt->flv_off > size_temp) {
2813 bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, size_temp);
2814 rt->flv_off += size_temp;
2817 bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, rt->flv_size - rt->flv_off);
2818 size_temp -= rt->flv_size - rt->flv_off;
2819 rt->flv_off += rt->flv_size - rt->flv_off;
2822 if (rt->flv_off == rt->flv_size) {
2825 if ((ret = rtmp_send_packet(rt, &rt->out_pkt, 0)) < 0)
2829 rt->flv_header_bytes = 0;
2830 rt->flv_nb_packets++;
2832 } while (buf_temp - buf < size);
2834 if (rt->flv_nb_packets < rt->flush_interval)
2836 rt->flv_nb_packets = 0;
2838 /* set stream into nonblocking mode */
2839 rt->stream->flags |= AVIO_FLAG_NONBLOCK;
2841 /* try to read one byte from the stream */
2842 ret = ffurl_read(rt->stream, &c, 1);
2844 /* switch the stream back into blocking mode */
2845 rt->stream->flags &= ~AVIO_FLAG_NONBLOCK;
2847 if (ret == AVERROR(EAGAIN)) {
2848 /* no incoming data to handle */
2850 } else if (ret < 0) {
2852 } else if (ret == 1) {
2853 RTMPPacket rpkt = { 0 };
2855 if ((ret = ff_rtmp_packet_read_internal(rt->stream, &rpkt,
2858 &rt->nb_prev_pkt[0], c)) <= 0)
2861 if ((ret = rtmp_parse_result(s, rt, &rpkt)) < 0)
2864 ff_rtmp_packet_destroy(&rpkt);
2870 #define OFFSET(x) offsetof(RTMPContext, x)
2871 #define DEC AV_OPT_FLAG_DECODING_PARAM
2872 #define ENC AV_OPT_FLAG_ENCODING_PARAM
2874 static const AVOption rtmp_options[] = {
2875 {"rtmp_app", "Name of application to connect to on the RTMP server", OFFSET(app), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2876 {"rtmp_buffer", "Set buffer time in milliseconds. The default is 3000.", OFFSET(client_buffer_time), AV_OPT_TYPE_INT, {.i64 = 3000}, 0, INT_MAX, DEC|ENC},
2877 {"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2878 {"rtmp_flashver", "Version of the Flash plugin used to run the SWF player.", OFFSET(flashver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2879 {"rtmp_flush_interval", "Number of packets flushed in the same request (RTMPT only).", OFFSET(flush_interval), AV_OPT_TYPE_INT, {.i64 = 10}, 0, INT_MAX, ENC},
2880 {"rtmp_live", "Specify that the media is a live stream.", OFFSET(live), AV_OPT_TYPE_INT, {.i64 = -2}, INT_MIN, INT_MAX, DEC, "rtmp_live"},
2881 {"any", "both", 0, AV_OPT_TYPE_CONST, {.i64 = -2}, 0, 0, DEC, "rtmp_live"},
2882 {"live", "live stream", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, DEC, "rtmp_live"},
2883 {"recorded", "recorded stream", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, DEC, "rtmp_live"},
2884 {"rtmp_pageurl", "URL of the web page in which the media was embedded. By default no value will be sent.", OFFSET(pageurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
2885 {"rtmp_playpath", "Stream identifier to play or to publish", OFFSET(playpath), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2886 {"rtmp_subscribe", "Name of live stream to subscribe to. Defaults to rtmp_playpath.", OFFSET(subscribe), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
2887 {"rtmp_swfhash", "SHA256 hash of the decompressed SWF file (32 bytes).", OFFSET(swfhash), AV_OPT_TYPE_BINARY, .flags = DEC},
2888 {"rtmp_swfsize", "Size of the decompressed SWF file, required for SWFVerification.", OFFSET(swfsize), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC},
2889 {"rtmp_swfurl", "URL of the SWF player. By default no value will be sent", OFFSET(swfurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2890 {"rtmp_swfverify", "URL to player swf file, compute hash/size automatically.", OFFSET(swfverify), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
2891 {"rtmp_tcurl", "URL of the target stream. Defaults to proto://host[:port]/app.", OFFSET(tcurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
2892 {"rtmp_listen", "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
2893 {"listen", "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
2894 {"timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies -rtmp_listen 1", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
2898 #define RTMP_PROTOCOL(flavor) \
2899 static const AVClass flavor##_class = { \
2900 .class_name = #flavor, \
2901 .item_name = av_default_item_name, \
2902 .option = rtmp_options, \
2903 .version = LIBAVUTIL_VERSION_INT, \
2906 URLProtocol ff_##flavor##_protocol = { \
2908 .url_open = rtmp_open, \
2909 .url_read = rtmp_read, \
2910 .url_read_seek = rtmp_seek, \
2911 .url_write = rtmp_write, \
2912 .url_close = rtmp_close, \
2913 .priv_data_size = sizeof(RTMPContext), \
2914 .flags = URL_PROTOCOL_FLAG_NETWORK, \
2915 .priv_data_class= &flavor##_class, \
2920 RTMP_PROTOCOL(rtmpe)
2921 RTMP_PROTOCOL(rtmps)
2922 RTMP_PROTOCOL(rtmpt)
2923 RTMP_PROTOCOL(rtmpte)
2924 RTMP_PROTOCOL(rtmpts)