| 1 | /* |
| 2 | * RTMP network protocol |
| 3 | * Copyright (c) 2009 Konstantin Shishkov |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 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. |
| 11 | * |
| 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. |
| 16 | * |
| 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 |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * RTMP protocol |
| 25 | */ |
| 26 | |
| 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" |
| 36 | #include "avformat.h" |
| 37 | #include "internal.h" |
| 38 | |
| 39 | #include "network.h" |
| 40 | |
| 41 | #include "flv.h" |
| 42 | #include "rtmp.h" |
| 43 | #include "rtmpcrypt.h" |
| 44 | #include "rtmppkt.h" |
| 45 | #include "url.h" |
| 46 | |
| 47 | #if CONFIG_ZLIB |
| 48 | #include <zlib.h> |
| 49 | #endif |
| 50 | |
| 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 |
| 57 | |
| 58 | /** RTMP protocol handler state */ |
| 59 | typedef enum { |
| 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 |
| 69 | } ClientState; |
| 70 | |
| 71 | typedef struct TrackedMethod { |
| 72 | char *name; |
| 73 | int id; |
| 74 | } TrackedMethod; |
| 75 | |
| 76 | /** protocol handler context */ |
| 77 | typedef struct RTMPContext { |
| 78 | const AVClass *class; |
| 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 | uint32_t last_timestamp; ///< last timestamp received in a packet |
| 100 | int skip_bytes; ///< number of bytes to skip from the input FLV stream in the next write call |
| 101 | int has_audio; ///< presence of audio data |
| 102 | int has_video; ///< presence of video data |
| 103 | int received_metadata; ///< Indicates if we have received metadata about the streams |
| 104 | uint8_t flv_header[RTMP_HEADER]; ///< partial incoming flv packet header |
| 105 | int flv_header_bytes; ///< number of initialized bytes in flv_header |
| 106 | int nb_invokes; ///< keeps track of invoke messages |
| 107 | char* tcurl; ///< url of the target stream |
| 108 | char* flashver; ///< version of the flash plugin |
| 109 | char* swfhash; ///< SHA256 hash of the decompressed SWF file (32 bytes) |
| 110 | int swfhash_len; ///< length of the SHA256 hash |
| 111 | int swfsize; ///< size of the decompressed SWF file |
| 112 | char* swfurl; ///< url of the swf player |
| 113 | char* swfverify; ///< URL to player swf file, compute hash/size automatically |
| 114 | char swfverification[42]; ///< hash of the SWF verification |
| 115 | char* pageurl; ///< url of the web page |
| 116 | char* subscribe; ///< name of live stream to subscribe |
| 117 | int server_bw; ///< server bandwidth |
| 118 | int client_buffer_time; ///< client buffer time in ms |
| 119 | int flush_interval; ///< number of packets flushed in the same request (RTMPT only) |
| 120 | int encrypted; ///< use an encrypted connection (RTMPE only) |
| 121 | TrackedMethod*tracked_methods; ///< tracked methods buffer |
| 122 | int nb_tracked_methods; ///< number of tracked methods |
| 123 | int tracked_methods_size; ///< size of the tracked methods buffer |
| 124 | int listen; ///< listen mode flag |
| 125 | int listen_timeout; ///< listen timeout to wait for new connections |
| 126 | int nb_streamid; ///< The next stream id to return on createStream calls |
| 127 | double duration; ///< Duration of the stream in seconds as returned by the server (only valid if non-zero) |
| 128 | char username[50]; |
| 129 | char password[50]; |
| 130 | char auth_params[500]; |
| 131 | int do_reconnect; |
| 132 | int auth_tried; |
| 133 | } RTMPContext; |
| 134 | |
| 135 | #define PLAYER_KEY_OPEN_PART_LEN 30 ///< length of partial key used for first client digest signing |
| 136 | /** Client key used for digest signing */ |
| 137 | static const uint8_t rtmp_player_key[] = { |
| 138 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', |
| 139 | 'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ', '0', '0', '1', |
| 140 | |
| 141 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, |
| 142 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, |
| 143 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE |
| 144 | }; |
| 145 | |
| 146 | #define SERVER_KEY_OPEN_PART_LEN 36 ///< length of partial key used for first server digest signing |
| 147 | /** Key used for RTMP server digest signing */ |
| 148 | static const uint8_t rtmp_server_key[] = { |
| 149 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', |
| 150 | 'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ', |
| 151 | 'S', 'e', 'r', 'v', 'e', 'r', ' ', '0', '0', '1', |
| 152 | |
| 153 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, |
| 154 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, |
| 155 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE |
| 156 | }; |
| 157 | |
| 158 | static int handle_chunk_size(URLContext *s, RTMPPacket *pkt); |
| 159 | |
| 160 | static int add_tracked_method(RTMPContext *rt, const char *name, int id) |
| 161 | { |
| 162 | int err; |
| 163 | |
| 164 | if (rt->nb_tracked_methods + 1 > rt->tracked_methods_size) { |
| 165 | rt->tracked_methods_size = (rt->nb_tracked_methods + 1) * 2; |
| 166 | if ((err = av_reallocp(&rt->tracked_methods, rt->tracked_methods_size * |
| 167 | sizeof(*rt->tracked_methods))) < 0) { |
| 168 | rt->nb_tracked_methods = 0; |
| 169 | rt->tracked_methods_size = 0; |
| 170 | return err; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | rt->tracked_methods[rt->nb_tracked_methods].name = av_strdup(name); |
| 175 | if (!rt->tracked_methods[rt->nb_tracked_methods].name) |
| 176 | return AVERROR(ENOMEM); |
| 177 | rt->tracked_methods[rt->nb_tracked_methods].id = id; |
| 178 | rt->nb_tracked_methods++; |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static void del_tracked_method(RTMPContext *rt, int index) |
| 184 | { |
| 185 | memmove(&rt->tracked_methods[index], &rt->tracked_methods[index + 1], |
| 186 | sizeof(*rt->tracked_methods) * (rt->nb_tracked_methods - index - 1)); |
| 187 | rt->nb_tracked_methods--; |
| 188 | } |
| 189 | |
| 190 | static int find_tracked_method(URLContext *s, RTMPPacket *pkt, int offset, |
| 191 | char **tracked_method) |
| 192 | { |
| 193 | RTMPContext *rt = s->priv_data; |
| 194 | GetByteContext gbc; |
| 195 | double pkt_id; |
| 196 | int ret; |
| 197 | int i; |
| 198 | |
| 199 | bytestream2_init(&gbc, pkt->data + offset, pkt->size - offset); |
| 200 | if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0) |
| 201 | return ret; |
| 202 | |
| 203 | for (i = 0; i < rt->nb_tracked_methods; i++) { |
| 204 | if (rt->tracked_methods[i].id != pkt_id) |
| 205 | continue; |
| 206 | |
| 207 | *tracked_method = rt->tracked_methods[i].name; |
| 208 | del_tracked_method(rt, i); |
| 209 | break; |
| 210 | } |
| 211 | |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | static void free_tracked_methods(RTMPContext *rt) |
| 216 | { |
| 217 | int i; |
| 218 | |
| 219 | for (i = 0; i < rt->nb_tracked_methods; i ++) |
| 220 | av_free(rt->tracked_methods[i].name); |
| 221 | av_free(rt->tracked_methods); |
| 222 | rt->tracked_methods = NULL; |
| 223 | rt->tracked_methods_size = 0; |
| 224 | rt->nb_tracked_methods = 0; |
| 225 | } |
| 226 | |
| 227 | static int rtmp_send_packet(RTMPContext *rt, RTMPPacket *pkt, int track) |
| 228 | { |
| 229 | int ret; |
| 230 | |
| 231 | if (pkt->type == RTMP_PT_INVOKE && track) { |
| 232 | GetByteContext gbc; |
| 233 | char name[128]; |
| 234 | double pkt_id; |
| 235 | int len; |
| 236 | |
| 237 | bytestream2_init(&gbc, pkt->data, pkt->size); |
| 238 | if ((ret = ff_amf_read_string(&gbc, name, sizeof(name), &len)) < 0) |
| 239 | goto fail; |
| 240 | |
| 241 | if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0) |
| 242 | goto fail; |
| 243 | |
| 244 | if ((ret = add_tracked_method(rt, name, pkt_id)) < 0) |
| 245 | goto fail; |
| 246 | } |
| 247 | |
| 248 | ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size, |
| 249 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 250 | fail: |
| 251 | ff_rtmp_packet_destroy(pkt); |
| 252 | return ret; |
| 253 | } |
| 254 | |
| 255 | static int rtmp_write_amf_data(URLContext *s, char *param, uint8_t **p) |
| 256 | { |
| 257 | char *field, *value; |
| 258 | char type; |
| 259 | |
| 260 | /* The type must be B for Boolean, N for number, S for string, O for |
| 261 | * object, or Z for null. For Booleans the data must be either 0 or 1 for |
| 262 | * FALSE or TRUE, respectively. Likewise for Objects the data must be |
| 263 | * 0 or 1 to end or begin an object, respectively. Data items in subobjects |
| 264 | * may be named, by prefixing the type with 'N' and specifying the name |
| 265 | * before the value (ie. NB:myFlag:1). This option may be used multiple times |
| 266 | * to construct arbitrary AMF sequences. */ |
| 267 | if (param[0] && param[1] == ':') { |
| 268 | type = param[0]; |
| 269 | value = param + 2; |
| 270 | } else if (param[0] == 'N' && param[1] && param[2] == ':') { |
| 271 | type = param[1]; |
| 272 | field = param + 3; |
| 273 | value = strchr(field, ':'); |
| 274 | if (!value) |
| 275 | goto fail; |
| 276 | *value = '\0'; |
| 277 | value++; |
| 278 | |
| 279 | ff_amf_write_field_name(p, field); |
| 280 | } else { |
| 281 | goto fail; |
| 282 | } |
| 283 | |
| 284 | switch (type) { |
| 285 | case 'B': |
| 286 | ff_amf_write_bool(p, value[0] != '0'); |
| 287 | break; |
| 288 | case 'S': |
| 289 | ff_amf_write_string(p, value); |
| 290 | break; |
| 291 | case 'N': |
| 292 | ff_amf_write_number(p, strtod(value, NULL)); |
| 293 | break; |
| 294 | case 'Z': |
| 295 | ff_amf_write_null(p); |
| 296 | break; |
| 297 | case 'O': |
| 298 | if (value[0] != '0') |
| 299 | ff_amf_write_object_start(p); |
| 300 | else |
| 301 | ff_amf_write_object_end(p); |
| 302 | break; |
| 303 | default: |
| 304 | goto fail; |
| 305 | break; |
| 306 | } |
| 307 | |
| 308 | return 0; |
| 309 | |
| 310 | fail: |
| 311 | av_log(s, AV_LOG_ERROR, "Invalid AMF parameter: %s\n", param); |
| 312 | return AVERROR(EINVAL); |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * Generate 'connect' call and send it to the server. |
| 317 | */ |
| 318 | static int gen_connect(URLContext *s, RTMPContext *rt) |
| 319 | { |
| 320 | RTMPPacket pkt; |
| 321 | uint8_t *p; |
| 322 | int ret; |
| 323 | |
| 324 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 325 | 0, 4096 + APP_MAX_LENGTH)) < 0) |
| 326 | return ret; |
| 327 | |
| 328 | p = pkt.data; |
| 329 | |
| 330 | ff_amf_write_string(&p, "connect"); |
| 331 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 332 | ff_amf_write_object_start(&p); |
| 333 | ff_amf_write_field_name(&p, "app"); |
| 334 | ff_amf_write_string2(&p, rt->app, rt->auth_params); |
| 335 | |
| 336 | if (!rt->is_input) { |
| 337 | ff_amf_write_field_name(&p, "type"); |
| 338 | ff_amf_write_string(&p, "nonprivate"); |
| 339 | } |
| 340 | ff_amf_write_field_name(&p, "flashVer"); |
| 341 | ff_amf_write_string(&p, rt->flashver); |
| 342 | |
| 343 | if (rt->swfurl) { |
| 344 | ff_amf_write_field_name(&p, "swfUrl"); |
| 345 | ff_amf_write_string(&p, rt->swfurl); |
| 346 | } |
| 347 | |
| 348 | ff_amf_write_field_name(&p, "tcUrl"); |
| 349 | ff_amf_write_string2(&p, rt->tcurl, rt->auth_params); |
| 350 | if (rt->is_input) { |
| 351 | ff_amf_write_field_name(&p, "fpad"); |
| 352 | ff_amf_write_bool(&p, 0); |
| 353 | ff_amf_write_field_name(&p, "capabilities"); |
| 354 | ff_amf_write_number(&p, 15.0); |
| 355 | |
| 356 | /* Tell the server we support all the audio codecs except |
| 357 | * SUPPORT_SND_INTEL (0x0008) and SUPPORT_SND_UNUSED (0x0010) |
| 358 | * which are unused in the RTMP protocol implementation. */ |
| 359 | ff_amf_write_field_name(&p, "audioCodecs"); |
| 360 | ff_amf_write_number(&p, 4071.0); |
| 361 | ff_amf_write_field_name(&p, "videoCodecs"); |
| 362 | ff_amf_write_number(&p, 252.0); |
| 363 | ff_amf_write_field_name(&p, "videoFunction"); |
| 364 | ff_amf_write_number(&p, 1.0); |
| 365 | |
| 366 | if (rt->pageurl) { |
| 367 | ff_amf_write_field_name(&p, "pageUrl"); |
| 368 | ff_amf_write_string(&p, rt->pageurl); |
| 369 | } |
| 370 | } |
| 371 | ff_amf_write_object_end(&p); |
| 372 | |
| 373 | if (rt->conn) { |
| 374 | char *param = rt->conn; |
| 375 | |
| 376 | // Write arbitrary AMF data to the Connect message. |
| 377 | while (param) { |
| 378 | char *sep; |
| 379 | param += strspn(param, " "); |
| 380 | if (!*param) |
| 381 | break; |
| 382 | sep = strchr(param, ' '); |
| 383 | if (sep) |
| 384 | *sep = '\0'; |
| 385 | if ((ret = rtmp_write_amf_data(s, param, &p)) < 0) { |
| 386 | // Invalid AMF parameter. |
| 387 | ff_rtmp_packet_destroy(&pkt); |
| 388 | return ret; |
| 389 | } |
| 390 | |
| 391 | if (sep) |
| 392 | param = sep + 1; |
| 393 | else |
| 394 | break; |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | pkt.size = p - pkt.data; |
| 399 | |
| 400 | return rtmp_send_packet(rt, &pkt, 1); |
| 401 | } |
| 402 | |
| 403 | static int read_connect(URLContext *s, RTMPContext *rt) |
| 404 | { |
| 405 | RTMPPacket pkt = { 0 }; |
| 406 | uint8_t *p; |
| 407 | const uint8_t *cp; |
| 408 | int ret; |
| 409 | char command[64]; |
| 410 | int stringlen; |
| 411 | double seqnum; |
| 412 | uint8_t tmpstr[256]; |
| 413 | GetByteContext gbc; |
| 414 | |
| 415 | if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size, |
| 416 | &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0) |
| 417 | return ret; |
| 418 | |
| 419 | if (pkt.type == RTMP_PT_CHUNK_SIZE) { |
| 420 | if ((ret = handle_chunk_size(s, &pkt)) < 0) |
| 421 | return ret; |
| 422 | |
| 423 | ff_rtmp_packet_destroy(&pkt); |
| 424 | if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size, |
| 425 | &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0) |
| 426 | return ret; |
| 427 | } |
| 428 | |
| 429 | cp = pkt.data; |
| 430 | bytestream2_init(&gbc, cp, pkt.size); |
| 431 | if (ff_amf_read_string(&gbc, command, sizeof(command), &stringlen)) { |
| 432 | av_log(s, AV_LOG_ERROR, "Unable to read command string\n"); |
| 433 | ff_rtmp_packet_destroy(&pkt); |
| 434 | return AVERROR_INVALIDDATA; |
| 435 | } |
| 436 | if (strcmp(command, "connect")) { |
| 437 | av_log(s, AV_LOG_ERROR, "Expecting connect, got %s\n", command); |
| 438 | ff_rtmp_packet_destroy(&pkt); |
| 439 | return AVERROR_INVALIDDATA; |
| 440 | } |
| 441 | ret = ff_amf_read_number(&gbc, &seqnum); |
| 442 | if (ret) |
| 443 | av_log(s, AV_LOG_WARNING, "SeqNum not found\n"); |
| 444 | /* Here one could parse an AMF Object with data as flashVers and others. */ |
| 445 | ret = ff_amf_get_field_value(gbc.buffer, |
| 446 | gbc.buffer + bytestream2_get_bytes_left(&gbc), |
| 447 | "app", tmpstr, sizeof(tmpstr)); |
| 448 | if (ret) |
| 449 | av_log(s, AV_LOG_WARNING, "App field not found in connect\n"); |
| 450 | if (!ret && strcmp(tmpstr, rt->app)) |
| 451 | av_log(s, AV_LOG_WARNING, "App field don't match up: %s <-> %s\n", |
| 452 | tmpstr, rt->app); |
| 453 | ff_rtmp_packet_destroy(&pkt); |
| 454 | |
| 455 | // Send Window Acknowledgement Size (as defined in speficication) |
| 456 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, |
| 457 | RTMP_PT_SERVER_BW, 0, 4)) < 0) |
| 458 | return ret; |
| 459 | p = pkt.data; |
| 460 | bytestream_put_be32(&p, rt->server_bw); |
| 461 | pkt.size = p - pkt.data; |
| 462 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 463 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 464 | ff_rtmp_packet_destroy(&pkt); |
| 465 | if (ret < 0) |
| 466 | return ret; |
| 467 | // Send Peer Bandwidth |
| 468 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, |
| 469 | RTMP_PT_CLIENT_BW, 0, 5)) < 0) |
| 470 | return ret; |
| 471 | p = pkt.data; |
| 472 | bytestream_put_be32(&p, rt->server_bw); |
| 473 | bytestream_put_byte(&p, 2); // dynamic |
| 474 | pkt.size = p - pkt.data; |
| 475 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 476 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 477 | ff_rtmp_packet_destroy(&pkt); |
| 478 | if (ret < 0) |
| 479 | return ret; |
| 480 | |
| 481 | // Ping request |
| 482 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, |
| 483 | RTMP_PT_PING, 0, 6)) < 0) |
| 484 | return ret; |
| 485 | |
| 486 | p = pkt.data; |
| 487 | bytestream_put_be16(&p, 0); // 0 -> Stream Begin |
| 488 | bytestream_put_be32(&p, 0); |
| 489 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 490 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 491 | ff_rtmp_packet_destroy(&pkt); |
| 492 | if (ret < 0) |
| 493 | return ret; |
| 494 | |
| 495 | // Chunk size |
| 496 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, |
| 497 | RTMP_PT_CHUNK_SIZE, 0, 4)) < 0) |
| 498 | return ret; |
| 499 | |
| 500 | p = pkt.data; |
| 501 | bytestream_put_be32(&p, rt->out_chunk_size); |
| 502 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 503 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 504 | ff_rtmp_packet_destroy(&pkt); |
| 505 | if (ret < 0) |
| 506 | return ret; |
| 507 | |
| 508 | // Send _result NetConnection.Connect.Success to connect |
| 509 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, |
| 510 | RTMP_PT_INVOKE, 0, |
| 511 | RTMP_PKTDATA_DEFAULT_SIZE)) < 0) |
| 512 | return ret; |
| 513 | |
| 514 | p = pkt.data; |
| 515 | ff_amf_write_string(&p, "_result"); |
| 516 | ff_amf_write_number(&p, seqnum); |
| 517 | |
| 518 | ff_amf_write_object_start(&p); |
| 519 | ff_amf_write_field_name(&p, "fmsVer"); |
| 520 | ff_amf_write_string(&p, "FMS/3,0,1,123"); |
| 521 | ff_amf_write_field_name(&p, "capabilities"); |
| 522 | ff_amf_write_number(&p, 31); |
| 523 | ff_amf_write_object_end(&p); |
| 524 | |
| 525 | ff_amf_write_object_start(&p); |
| 526 | ff_amf_write_field_name(&p, "level"); |
| 527 | ff_amf_write_string(&p, "status"); |
| 528 | ff_amf_write_field_name(&p, "code"); |
| 529 | ff_amf_write_string(&p, "NetConnection.Connect.Success"); |
| 530 | ff_amf_write_field_name(&p, "description"); |
| 531 | ff_amf_write_string(&p, "Connection succeeded."); |
| 532 | ff_amf_write_field_name(&p, "objectEncoding"); |
| 533 | ff_amf_write_number(&p, 0); |
| 534 | ff_amf_write_object_end(&p); |
| 535 | |
| 536 | pkt.size = p - pkt.data; |
| 537 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 538 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 539 | ff_rtmp_packet_destroy(&pkt); |
| 540 | if (ret < 0) |
| 541 | return ret; |
| 542 | |
| 543 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, |
| 544 | RTMP_PT_INVOKE, 0, 30)) < 0) |
| 545 | return ret; |
| 546 | p = pkt.data; |
| 547 | ff_amf_write_string(&p, "onBWDone"); |
| 548 | ff_amf_write_number(&p, 0); |
| 549 | ff_amf_write_null(&p); |
| 550 | ff_amf_write_number(&p, 8192); |
| 551 | pkt.size = p - pkt.data; |
| 552 | ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size, |
| 553 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 554 | ff_rtmp_packet_destroy(&pkt); |
| 555 | |
| 556 | return ret; |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Generate 'releaseStream' call and send it to the server. It should make |
| 561 | * the server release some channel for media streams. |
| 562 | */ |
| 563 | static int gen_release_stream(URLContext *s, RTMPContext *rt) |
| 564 | { |
| 565 | RTMPPacket pkt; |
| 566 | uint8_t *p; |
| 567 | int ret; |
| 568 | |
| 569 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 570 | 0, 29 + strlen(rt->playpath))) < 0) |
| 571 | return ret; |
| 572 | |
| 573 | av_log(s, AV_LOG_DEBUG, "Releasing stream...\n"); |
| 574 | p = pkt.data; |
| 575 | ff_amf_write_string(&p, "releaseStream"); |
| 576 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 577 | ff_amf_write_null(&p); |
| 578 | ff_amf_write_string(&p, rt->playpath); |
| 579 | |
| 580 | return rtmp_send_packet(rt, &pkt, 1); |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * Generate 'FCPublish' call and send it to the server. It should make |
| 585 | * the server preapare for receiving media streams. |
| 586 | */ |
| 587 | static int gen_fcpublish_stream(URLContext *s, RTMPContext *rt) |
| 588 | { |
| 589 | RTMPPacket pkt; |
| 590 | uint8_t *p; |
| 591 | int ret; |
| 592 | |
| 593 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 594 | 0, 25 + strlen(rt->playpath))) < 0) |
| 595 | return ret; |
| 596 | |
| 597 | av_log(s, AV_LOG_DEBUG, "FCPublish stream...\n"); |
| 598 | p = pkt.data; |
| 599 | ff_amf_write_string(&p, "FCPublish"); |
| 600 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 601 | ff_amf_write_null(&p); |
| 602 | ff_amf_write_string(&p, rt->playpath); |
| 603 | |
| 604 | return rtmp_send_packet(rt, &pkt, 1); |
| 605 | } |
| 606 | |
| 607 | /** |
| 608 | * Generate 'FCUnpublish' call and send it to the server. It should make |
| 609 | * the server destroy stream. |
| 610 | */ |
| 611 | static int gen_fcunpublish_stream(URLContext *s, RTMPContext *rt) |
| 612 | { |
| 613 | RTMPPacket pkt; |
| 614 | uint8_t *p; |
| 615 | int ret; |
| 616 | |
| 617 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 618 | 0, 27 + strlen(rt->playpath))) < 0) |
| 619 | return ret; |
| 620 | |
| 621 | av_log(s, AV_LOG_DEBUG, "UnPublishing stream...\n"); |
| 622 | p = pkt.data; |
| 623 | ff_amf_write_string(&p, "FCUnpublish"); |
| 624 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 625 | ff_amf_write_null(&p); |
| 626 | ff_amf_write_string(&p, rt->playpath); |
| 627 | |
| 628 | return rtmp_send_packet(rt, &pkt, 0); |
| 629 | } |
| 630 | |
| 631 | /** |
| 632 | * Generate 'createStream' call and send it to the server. It should make |
| 633 | * the server allocate some channel for media streams. |
| 634 | */ |
| 635 | static int gen_create_stream(URLContext *s, RTMPContext *rt) |
| 636 | { |
| 637 | RTMPPacket pkt; |
| 638 | uint8_t *p; |
| 639 | int ret; |
| 640 | |
| 641 | av_log(s, AV_LOG_DEBUG, "Creating stream...\n"); |
| 642 | |
| 643 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 644 | 0, 25)) < 0) |
| 645 | return ret; |
| 646 | |
| 647 | p = pkt.data; |
| 648 | ff_amf_write_string(&p, "createStream"); |
| 649 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 650 | ff_amf_write_null(&p); |
| 651 | |
| 652 | return rtmp_send_packet(rt, &pkt, 1); |
| 653 | } |
| 654 | |
| 655 | |
| 656 | /** |
| 657 | * Generate 'deleteStream' call and send it to the server. It should make |
| 658 | * the server remove some channel for media streams. |
| 659 | */ |
| 660 | static int gen_delete_stream(URLContext *s, RTMPContext *rt) |
| 661 | { |
| 662 | RTMPPacket pkt; |
| 663 | uint8_t *p; |
| 664 | int ret; |
| 665 | |
| 666 | av_log(s, AV_LOG_DEBUG, "Deleting stream...\n"); |
| 667 | |
| 668 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 669 | 0, 34)) < 0) |
| 670 | return ret; |
| 671 | |
| 672 | p = pkt.data; |
| 673 | ff_amf_write_string(&p, "deleteStream"); |
| 674 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 675 | ff_amf_write_null(&p); |
| 676 | ff_amf_write_number(&p, rt->stream_id); |
| 677 | |
| 678 | return rtmp_send_packet(rt, &pkt, 0); |
| 679 | } |
| 680 | |
| 681 | /** |
| 682 | * Generate 'getStreamLength' call and send it to the server. If the server |
| 683 | * knows the duration of the selected stream, it will reply with the duration |
| 684 | * in seconds. |
| 685 | */ |
| 686 | static int gen_get_stream_length(URLContext *s, RTMPContext *rt) |
| 687 | { |
| 688 | RTMPPacket pkt; |
| 689 | uint8_t *p; |
| 690 | int ret; |
| 691 | |
| 692 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, |
| 693 | 0, 31 + strlen(rt->playpath))) < 0) |
| 694 | return ret; |
| 695 | |
| 696 | p = pkt.data; |
| 697 | ff_amf_write_string(&p, "getStreamLength"); |
| 698 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 699 | ff_amf_write_null(&p); |
| 700 | ff_amf_write_string(&p, rt->playpath); |
| 701 | |
| 702 | return rtmp_send_packet(rt, &pkt, 1); |
| 703 | } |
| 704 | |
| 705 | /** |
| 706 | * Generate client buffer time and send it to the server. |
| 707 | */ |
| 708 | static int gen_buffer_time(URLContext *s, RTMPContext *rt) |
| 709 | { |
| 710 | RTMPPacket pkt; |
| 711 | uint8_t *p; |
| 712 | int ret; |
| 713 | |
| 714 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, |
| 715 | 1, 10)) < 0) |
| 716 | return ret; |
| 717 | |
| 718 | p = pkt.data; |
| 719 | bytestream_put_be16(&p, 3); |
| 720 | bytestream_put_be32(&p, rt->stream_id); |
| 721 | bytestream_put_be32(&p, rt->client_buffer_time); |
| 722 | |
| 723 | return rtmp_send_packet(rt, &pkt, 0); |
| 724 | } |
| 725 | |
| 726 | /** |
| 727 | * Generate 'play' call and send it to the server, then ping the server |
| 728 | * to start actual playing. |
| 729 | */ |
| 730 | static int gen_play(URLContext *s, RTMPContext *rt) |
| 731 | { |
| 732 | RTMPPacket pkt; |
| 733 | uint8_t *p; |
| 734 | int ret; |
| 735 | |
| 736 | av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath); |
| 737 | |
| 738 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, |
| 739 | 0, 29 + strlen(rt->playpath))) < 0) |
| 740 | return ret; |
| 741 | |
| 742 | pkt.extra = rt->stream_id; |
| 743 | |
| 744 | p = pkt.data; |
| 745 | ff_amf_write_string(&p, "play"); |
| 746 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 747 | ff_amf_write_null(&p); |
| 748 | ff_amf_write_string(&p, rt->playpath); |
| 749 | ff_amf_write_number(&p, rt->live * 1000); |
| 750 | |
| 751 | return rtmp_send_packet(rt, &pkt, 1); |
| 752 | } |
| 753 | |
| 754 | static int gen_seek(URLContext *s, RTMPContext *rt, int64_t timestamp) |
| 755 | { |
| 756 | RTMPPacket pkt; |
| 757 | uint8_t *p; |
| 758 | int ret; |
| 759 | |
| 760 | av_log(s, AV_LOG_DEBUG, "Sending seek command for timestamp %"PRId64"\n", |
| 761 | timestamp); |
| 762 | |
| 763 | if ((ret = ff_rtmp_packet_create(&pkt, 3, RTMP_PT_INVOKE, 0, 26)) < 0) |
| 764 | return ret; |
| 765 | |
| 766 | pkt.extra = rt->stream_id; |
| 767 | |
| 768 | p = pkt.data; |
| 769 | ff_amf_write_string(&p, "seek"); |
| 770 | ff_amf_write_number(&p, 0); //no tracking back responses |
| 771 | ff_amf_write_null(&p); //as usual, the first null param |
| 772 | ff_amf_write_number(&p, timestamp); //where we want to jump |
| 773 | |
| 774 | return rtmp_send_packet(rt, &pkt, 1); |
| 775 | } |
| 776 | |
| 777 | /** |
| 778 | * Generate a pause packet that either pauses or unpauses the current stream. |
| 779 | */ |
| 780 | static int gen_pause(URLContext *s, RTMPContext *rt, int pause, uint32_t timestamp) |
| 781 | { |
| 782 | RTMPPacket pkt; |
| 783 | uint8_t *p; |
| 784 | int ret; |
| 785 | |
| 786 | av_log(s, AV_LOG_DEBUG, "Sending pause command for timestamp %d\n", |
| 787 | timestamp); |
| 788 | |
| 789 | if ((ret = ff_rtmp_packet_create(&pkt, 3, RTMP_PT_INVOKE, 0, 29)) < 0) |
| 790 | return ret; |
| 791 | |
| 792 | pkt.extra = rt->stream_id; |
| 793 | |
| 794 | p = pkt.data; |
| 795 | ff_amf_write_string(&p, "pause"); |
| 796 | ff_amf_write_number(&p, 0); //no tracking back responses |
| 797 | ff_amf_write_null(&p); //as usual, the first null param |
| 798 | ff_amf_write_bool(&p, pause); // pause or unpause |
| 799 | ff_amf_write_number(&p, timestamp); //where we pause the stream |
| 800 | |
| 801 | return rtmp_send_packet(rt, &pkt, 1); |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * Generate 'publish' call and send it to the server. |
| 806 | */ |
| 807 | static int gen_publish(URLContext *s, RTMPContext *rt) |
| 808 | { |
| 809 | RTMPPacket pkt; |
| 810 | uint8_t *p; |
| 811 | int ret; |
| 812 | |
| 813 | av_log(s, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath); |
| 814 | |
| 815 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, |
| 816 | 0, 30 + strlen(rt->playpath))) < 0) |
| 817 | return ret; |
| 818 | |
| 819 | pkt.extra = rt->stream_id; |
| 820 | |
| 821 | p = pkt.data; |
| 822 | ff_amf_write_string(&p, "publish"); |
| 823 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 824 | ff_amf_write_null(&p); |
| 825 | ff_amf_write_string(&p, rt->playpath); |
| 826 | ff_amf_write_string(&p, "live"); |
| 827 | |
| 828 | return rtmp_send_packet(rt, &pkt, 1); |
| 829 | } |
| 830 | |
| 831 | /** |
| 832 | * Generate ping reply and send it to the server. |
| 833 | */ |
| 834 | static int gen_pong(URLContext *s, RTMPContext *rt, RTMPPacket *ppkt) |
| 835 | { |
| 836 | RTMPPacket pkt; |
| 837 | uint8_t *p; |
| 838 | int ret; |
| 839 | |
| 840 | if (ppkt->size < 6) { |
| 841 | av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n", |
| 842 | ppkt->size); |
| 843 | return AVERROR_INVALIDDATA; |
| 844 | } |
| 845 | |
| 846 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, |
| 847 | ppkt->timestamp + 1, 6)) < 0) |
| 848 | return ret; |
| 849 | |
| 850 | p = pkt.data; |
| 851 | bytestream_put_be16(&p, 7); |
| 852 | bytestream_put_be32(&p, AV_RB32(ppkt->data+2)); |
| 853 | |
| 854 | return rtmp_send_packet(rt, &pkt, 0); |
| 855 | } |
| 856 | |
| 857 | /** |
| 858 | * Generate SWF verification message and send it to the server. |
| 859 | */ |
| 860 | static int gen_swf_verification(URLContext *s, RTMPContext *rt) |
| 861 | { |
| 862 | RTMPPacket pkt; |
| 863 | uint8_t *p; |
| 864 | int ret; |
| 865 | |
| 866 | av_log(s, AV_LOG_DEBUG, "Sending SWF verification...\n"); |
| 867 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, |
| 868 | 0, 44)) < 0) |
| 869 | return ret; |
| 870 | |
| 871 | p = pkt.data; |
| 872 | bytestream_put_be16(&p, 27); |
| 873 | memcpy(p, rt->swfverification, 42); |
| 874 | |
| 875 | return rtmp_send_packet(rt, &pkt, 0); |
| 876 | } |
| 877 | |
| 878 | /** |
| 879 | * Generate server bandwidth message and send it to the server. |
| 880 | */ |
| 881 | static int gen_server_bw(URLContext *s, RTMPContext *rt) |
| 882 | { |
| 883 | RTMPPacket pkt; |
| 884 | uint8_t *p; |
| 885 | int ret; |
| 886 | |
| 887 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_SERVER_BW, |
| 888 | 0, 4)) < 0) |
| 889 | return ret; |
| 890 | |
| 891 | p = pkt.data; |
| 892 | bytestream_put_be32(&p, rt->server_bw); |
| 893 | |
| 894 | return rtmp_send_packet(rt, &pkt, 0); |
| 895 | } |
| 896 | |
| 897 | /** |
| 898 | * Generate check bandwidth message and send it to the server. |
| 899 | */ |
| 900 | static int gen_check_bw(URLContext *s, RTMPContext *rt) |
| 901 | { |
| 902 | RTMPPacket pkt; |
| 903 | uint8_t *p; |
| 904 | int ret; |
| 905 | |
| 906 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 907 | 0, 21)) < 0) |
| 908 | return ret; |
| 909 | |
| 910 | p = pkt.data; |
| 911 | ff_amf_write_string(&p, "_checkbw"); |
| 912 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 913 | ff_amf_write_null(&p); |
| 914 | |
| 915 | return rtmp_send_packet(rt, &pkt, 1); |
| 916 | } |
| 917 | |
| 918 | /** |
| 919 | * Generate report on bytes read so far and send it to the server. |
| 920 | */ |
| 921 | static int gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts) |
| 922 | { |
| 923 | RTMPPacket pkt; |
| 924 | uint8_t *p; |
| 925 | int ret; |
| 926 | |
| 927 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_BYTES_READ, |
| 928 | ts, 4)) < 0) |
| 929 | return ret; |
| 930 | |
| 931 | p = pkt.data; |
| 932 | bytestream_put_be32(&p, rt->bytes_read); |
| 933 | |
| 934 | return rtmp_send_packet(rt, &pkt, 0); |
| 935 | } |
| 936 | |
| 937 | static int gen_fcsubscribe_stream(URLContext *s, RTMPContext *rt, |
| 938 | const char *subscribe) |
| 939 | { |
| 940 | RTMPPacket pkt; |
| 941 | uint8_t *p; |
| 942 | int ret; |
| 943 | |
| 944 | if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, |
| 945 | 0, 27 + strlen(subscribe))) < 0) |
| 946 | return ret; |
| 947 | |
| 948 | p = pkt.data; |
| 949 | ff_amf_write_string(&p, "FCSubscribe"); |
| 950 | ff_amf_write_number(&p, ++rt->nb_invokes); |
| 951 | ff_amf_write_null(&p); |
| 952 | ff_amf_write_string(&p, subscribe); |
| 953 | |
| 954 | return rtmp_send_packet(rt, &pkt, 1); |
| 955 | } |
| 956 | |
| 957 | int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap, |
| 958 | const uint8_t *key, int keylen, uint8_t *dst) |
| 959 | { |
| 960 | struct AVSHA *sha; |
| 961 | uint8_t hmac_buf[64+32] = {0}; |
| 962 | int i; |
| 963 | |
| 964 | sha = av_sha_alloc(); |
| 965 | if (!sha) |
| 966 | return AVERROR(ENOMEM); |
| 967 | |
| 968 | if (keylen < 64) { |
| 969 | memcpy(hmac_buf, key, keylen); |
| 970 | } else { |
| 971 | av_sha_init(sha, 256); |
| 972 | av_sha_update(sha,key, keylen); |
| 973 | av_sha_final(sha, hmac_buf); |
| 974 | } |
| 975 | for (i = 0; i < 64; i++) |
| 976 | hmac_buf[i] ^= HMAC_IPAD_VAL; |
| 977 | |
| 978 | av_sha_init(sha, 256); |
| 979 | av_sha_update(sha, hmac_buf, 64); |
| 980 | if (gap <= 0) { |
| 981 | av_sha_update(sha, src, len); |
| 982 | } else { //skip 32 bytes used for storing digest |
| 983 | av_sha_update(sha, src, gap); |
| 984 | av_sha_update(sha, src + gap + 32, len - gap - 32); |
| 985 | } |
| 986 | av_sha_final(sha, hmac_buf + 64); |
| 987 | |
| 988 | for (i = 0; i < 64; i++) |
| 989 | hmac_buf[i] ^= HMAC_IPAD_VAL ^ HMAC_OPAD_VAL; //reuse XORed key for opad |
| 990 | av_sha_init(sha, 256); |
| 991 | av_sha_update(sha, hmac_buf, 64+32); |
| 992 | av_sha_final(sha, dst); |
| 993 | |
| 994 | av_free(sha); |
| 995 | |
| 996 | return 0; |
| 997 | } |
| 998 | |
| 999 | int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val, |
| 1000 | int add_val) |
| 1001 | { |
| 1002 | int i, digest_pos = 0; |
| 1003 | |
| 1004 | for (i = 0; i < 4; i++) |
| 1005 | digest_pos += buf[i + off]; |
| 1006 | digest_pos = digest_pos % mod_val + add_val; |
| 1007 | |
| 1008 | return digest_pos; |
| 1009 | } |
| 1010 | |
| 1011 | /** |
| 1012 | * Put HMAC-SHA2 digest of packet data (except for the bytes where this digest |
| 1013 | * will be stored) into that packet. |
| 1014 | * |
| 1015 | * @param buf handshake data (1536 bytes) |
| 1016 | * @param encrypted use an encrypted connection (RTMPE) |
| 1017 | * @return offset to the digest inside input data |
| 1018 | */ |
| 1019 | static int rtmp_handshake_imprint_with_digest(uint8_t *buf, int encrypted) |
| 1020 | { |
| 1021 | int ret, digest_pos; |
| 1022 | |
| 1023 | if (encrypted) |
| 1024 | digest_pos = ff_rtmp_calc_digest_pos(buf, 772, 728, 776); |
| 1025 | else |
| 1026 | digest_pos = ff_rtmp_calc_digest_pos(buf, 8, 728, 12); |
| 1027 | |
| 1028 | ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, |
| 1029 | rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN, |
| 1030 | buf + digest_pos); |
| 1031 | if (ret < 0) |
| 1032 | return ret; |
| 1033 | |
| 1034 | return digest_pos; |
| 1035 | } |
| 1036 | |
| 1037 | /** |
| 1038 | * Verify that the received server response has the expected digest value. |
| 1039 | * |
| 1040 | * @param buf handshake data received from the server (1536 bytes) |
| 1041 | * @param off position to search digest offset from |
| 1042 | * @return 0 if digest is valid, digest position otherwise |
| 1043 | */ |
| 1044 | static int rtmp_validate_digest(uint8_t *buf, int off) |
| 1045 | { |
| 1046 | uint8_t digest[32]; |
| 1047 | int ret, digest_pos; |
| 1048 | |
| 1049 | digest_pos = ff_rtmp_calc_digest_pos(buf, off, 728, off + 4); |
| 1050 | |
| 1051 | ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, |
| 1052 | rtmp_server_key, SERVER_KEY_OPEN_PART_LEN, |
| 1053 | digest); |
| 1054 | if (ret < 0) |
| 1055 | return ret; |
| 1056 | |
| 1057 | if (!memcmp(digest, buf + digest_pos, 32)) |
| 1058 | return digest_pos; |
| 1059 | return 0; |
| 1060 | } |
| 1061 | |
| 1062 | static int rtmp_calc_swf_verification(URLContext *s, RTMPContext *rt, |
| 1063 | uint8_t *buf) |
| 1064 | { |
| 1065 | uint8_t *p; |
| 1066 | int ret; |
| 1067 | |
| 1068 | if (rt->swfhash_len != 32) { |
| 1069 | av_log(s, AV_LOG_ERROR, |
| 1070 | "Hash of the decompressed SWF file is not 32 bytes long.\n"); |
| 1071 | return AVERROR(EINVAL); |
| 1072 | } |
| 1073 | |
| 1074 | p = &rt->swfverification[0]; |
| 1075 | bytestream_put_byte(&p, 1); |
| 1076 | bytestream_put_byte(&p, 1); |
| 1077 | bytestream_put_be32(&p, rt->swfsize); |
| 1078 | bytestream_put_be32(&p, rt->swfsize); |
| 1079 | |
| 1080 | if ((ret = ff_rtmp_calc_digest(rt->swfhash, 32, 0, buf, 32, p)) < 0) |
| 1081 | return ret; |
| 1082 | |
| 1083 | return 0; |
| 1084 | } |
| 1085 | |
| 1086 | #if CONFIG_ZLIB |
| 1087 | static int rtmp_uncompress_swfplayer(uint8_t *in_data, int64_t in_size, |
| 1088 | uint8_t **out_data, int64_t *out_size) |
| 1089 | { |
| 1090 | z_stream zs = { 0 }; |
| 1091 | void *ptr; |
| 1092 | int size; |
| 1093 | int ret = 0; |
| 1094 | |
| 1095 | zs.avail_in = in_size; |
| 1096 | zs.next_in = in_data; |
| 1097 | ret = inflateInit(&zs); |
| 1098 | if (ret != Z_OK) |
| 1099 | return AVERROR_UNKNOWN; |
| 1100 | |
| 1101 | do { |
| 1102 | uint8_t tmp_buf[16384]; |
| 1103 | |
| 1104 | zs.avail_out = sizeof(tmp_buf); |
| 1105 | zs.next_out = tmp_buf; |
| 1106 | |
| 1107 | ret = inflate(&zs, Z_NO_FLUSH); |
| 1108 | if (ret != Z_OK && ret != Z_STREAM_END) { |
| 1109 | ret = AVERROR_UNKNOWN; |
| 1110 | goto fail; |
| 1111 | } |
| 1112 | |
| 1113 | size = sizeof(tmp_buf) - zs.avail_out; |
| 1114 | if (!(ptr = av_realloc(*out_data, *out_size + size))) { |
| 1115 | ret = AVERROR(ENOMEM); |
| 1116 | goto fail; |
| 1117 | } |
| 1118 | *out_data = ptr; |
| 1119 | |
| 1120 | memcpy(*out_data + *out_size, tmp_buf, size); |
| 1121 | *out_size += size; |
| 1122 | } while (zs.avail_out == 0); |
| 1123 | |
| 1124 | fail: |
| 1125 | inflateEnd(&zs); |
| 1126 | return ret; |
| 1127 | } |
| 1128 | #endif |
| 1129 | |
| 1130 | static int rtmp_calc_swfhash(URLContext *s) |
| 1131 | { |
| 1132 | RTMPContext *rt = s->priv_data; |
| 1133 | uint8_t *in_data = NULL, *out_data = NULL, *swfdata; |
| 1134 | int64_t in_size, out_size; |
| 1135 | URLContext *stream; |
| 1136 | char swfhash[32]; |
| 1137 | int swfsize; |
| 1138 | int ret = 0; |
| 1139 | |
| 1140 | /* Get the SWF player file. */ |
| 1141 | if ((ret = ffurl_open(&stream, rt->swfverify, AVIO_FLAG_READ, |
| 1142 | &s->interrupt_callback, NULL)) < 0) { |
| 1143 | av_log(s, AV_LOG_ERROR, "Cannot open connection %s.\n", rt->swfverify); |
| 1144 | goto fail; |
| 1145 | } |
| 1146 | |
| 1147 | if ((in_size = ffurl_seek(stream, 0, AVSEEK_SIZE)) < 0) { |
| 1148 | ret = AVERROR(EIO); |
| 1149 | goto fail; |
| 1150 | } |
| 1151 | |
| 1152 | if (!(in_data = av_malloc(in_size))) { |
| 1153 | ret = AVERROR(ENOMEM); |
| 1154 | goto fail; |
| 1155 | } |
| 1156 | |
| 1157 | if ((ret = ffurl_read_complete(stream, in_data, in_size)) < 0) |
| 1158 | goto fail; |
| 1159 | |
| 1160 | if (in_size < 3) { |
| 1161 | ret = AVERROR_INVALIDDATA; |
| 1162 | goto fail; |
| 1163 | } |
| 1164 | |
| 1165 | if (!memcmp(in_data, "CWS", 3)) { |
| 1166 | /* Decompress the SWF player file using Zlib. */ |
| 1167 | if (!(out_data = av_malloc(8))) { |
| 1168 | ret = AVERROR(ENOMEM); |
| 1169 | goto fail; |
| 1170 | } |
| 1171 | *in_data = 'F'; // magic stuff |
| 1172 | memcpy(out_data, in_data, 8); |
| 1173 | out_size = 8; |
| 1174 | |
| 1175 | #if CONFIG_ZLIB |
| 1176 | if ((ret = rtmp_uncompress_swfplayer(in_data + 8, in_size - 8, |
| 1177 | &out_data, &out_size)) < 0) |
| 1178 | goto fail; |
| 1179 | #else |
| 1180 | av_log(s, AV_LOG_ERROR, |
| 1181 | "Zlib is required for decompressing the SWF player file.\n"); |
| 1182 | ret = AVERROR(EINVAL); |
| 1183 | goto fail; |
| 1184 | #endif |
| 1185 | swfsize = out_size; |
| 1186 | swfdata = out_data; |
| 1187 | } else { |
| 1188 | swfsize = in_size; |
| 1189 | swfdata = in_data; |
| 1190 | } |
| 1191 | |
| 1192 | /* Compute the SHA256 hash of the SWF player file. */ |
| 1193 | if ((ret = ff_rtmp_calc_digest(swfdata, swfsize, 0, |
| 1194 | "Genuine Adobe Flash Player 001", 30, |
| 1195 | swfhash)) < 0) |
| 1196 | goto fail; |
| 1197 | |
| 1198 | /* Set SWFVerification parameters. */ |
| 1199 | av_opt_set_bin(rt, "rtmp_swfhash", swfhash, 32, 0); |
| 1200 | rt->swfsize = swfsize; |
| 1201 | |
| 1202 | fail: |
| 1203 | av_freep(&in_data); |
| 1204 | av_freep(&out_data); |
| 1205 | ffurl_close(stream); |
| 1206 | return ret; |
| 1207 | } |
| 1208 | |
| 1209 | /** |
| 1210 | * Perform handshake with the server by means of exchanging pseudorandom data |
| 1211 | * signed with HMAC-SHA2 digest. |
| 1212 | * |
| 1213 | * @return 0 if handshake succeeds, negative value otherwise |
| 1214 | */ |
| 1215 | static int rtmp_handshake(URLContext *s, RTMPContext *rt) |
| 1216 | { |
| 1217 | AVLFG rnd; |
| 1218 | uint8_t tosend [RTMP_HANDSHAKE_PACKET_SIZE+1] = { |
| 1219 | 3, // unencrypted data |
| 1220 | 0, 0, 0, 0, // client uptime |
| 1221 | RTMP_CLIENT_VER1, |
| 1222 | RTMP_CLIENT_VER2, |
| 1223 | RTMP_CLIENT_VER3, |
| 1224 | RTMP_CLIENT_VER4, |
| 1225 | }; |
| 1226 | uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE]; |
| 1227 | uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1]; |
| 1228 | int i; |
| 1229 | int server_pos, client_pos; |
| 1230 | uint8_t digest[32], signature[32]; |
| 1231 | int ret, type = 0; |
| 1232 | |
| 1233 | av_log(s, AV_LOG_DEBUG, "Handshaking...\n"); |
| 1234 | |
| 1235 | av_lfg_init(&rnd, 0xDEADC0DE); |
| 1236 | // generate handshake packet - 1536 bytes of pseudorandom data |
| 1237 | for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++) |
| 1238 | tosend[i] = av_lfg_get(&rnd) >> 24; |
| 1239 | |
| 1240 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1241 | /* When the client wants to use RTMPE, we have to change the command |
| 1242 | * byte to 0x06 which means to use encrypted data and we have to set |
| 1243 | * the flash version to at least 9.0.115.0. */ |
| 1244 | tosend[0] = 6; |
| 1245 | tosend[5] = 128; |
| 1246 | tosend[6] = 0; |
| 1247 | tosend[7] = 3; |
| 1248 | tosend[8] = 2; |
| 1249 | |
| 1250 | /* Initialize the Diffie-Hellmann context and generate the public key |
| 1251 | * to send to the server. */ |
| 1252 | if ((ret = ff_rtmpe_gen_pub_key(rt->stream, tosend + 1)) < 0) |
| 1253 | return ret; |
| 1254 | } |
| 1255 | |
| 1256 | client_pos = rtmp_handshake_imprint_with_digest(tosend + 1, rt->encrypted); |
| 1257 | if (client_pos < 0) |
| 1258 | return client_pos; |
| 1259 | |
| 1260 | if ((ret = ffurl_write(rt->stream, tosend, |
| 1261 | RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) { |
| 1262 | av_log(s, AV_LOG_ERROR, "Cannot write RTMP handshake request\n"); |
| 1263 | return ret; |
| 1264 | } |
| 1265 | |
| 1266 | if ((ret = ffurl_read_complete(rt->stream, serverdata, |
| 1267 | RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) { |
| 1268 | av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); |
| 1269 | return ret; |
| 1270 | } |
| 1271 | |
| 1272 | if ((ret = ffurl_read_complete(rt->stream, clientdata, |
| 1273 | RTMP_HANDSHAKE_PACKET_SIZE)) < 0) { |
| 1274 | av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); |
| 1275 | return ret; |
| 1276 | } |
| 1277 | |
| 1278 | av_log(s, AV_LOG_DEBUG, "Type answer %d\n", serverdata[0]); |
| 1279 | av_log(s, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n", |
| 1280 | serverdata[5], serverdata[6], serverdata[7], serverdata[8]); |
| 1281 | |
| 1282 | if (rt->is_input && serverdata[5] >= 3) { |
| 1283 | server_pos = rtmp_validate_digest(serverdata + 1, 772); |
| 1284 | if (server_pos < 0) |
| 1285 | return server_pos; |
| 1286 | |
| 1287 | if (!server_pos) { |
| 1288 | type = 1; |
| 1289 | server_pos = rtmp_validate_digest(serverdata + 1, 8); |
| 1290 | if (server_pos < 0) |
| 1291 | return server_pos; |
| 1292 | |
| 1293 | if (!server_pos) { |
| 1294 | av_log(s, AV_LOG_ERROR, "Server response validating failed\n"); |
| 1295 | return AVERROR(EIO); |
| 1296 | } |
| 1297 | } |
| 1298 | |
| 1299 | /* Generate SWFVerification token (SHA256 HMAC hash of decompressed SWF, |
| 1300 | * key are the last 32 bytes of the server handshake. */ |
| 1301 | if (rt->swfsize) { |
| 1302 | if ((ret = rtmp_calc_swf_verification(s, rt, serverdata + 1 + |
| 1303 | RTMP_HANDSHAKE_PACKET_SIZE - 32)) < 0) |
| 1304 | return ret; |
| 1305 | } |
| 1306 | |
| 1307 | ret = ff_rtmp_calc_digest(tosend + 1 + client_pos, 32, 0, |
| 1308 | rtmp_server_key, sizeof(rtmp_server_key), |
| 1309 | digest); |
| 1310 | if (ret < 0) |
| 1311 | return ret; |
| 1312 | |
| 1313 | ret = ff_rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE - 32, |
| 1314 | 0, digest, 32, signature); |
| 1315 | if (ret < 0) |
| 1316 | return ret; |
| 1317 | |
| 1318 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1319 | /* Compute the shared secret key sent by the server and initialize |
| 1320 | * the RC4 encryption. */ |
| 1321 | if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1, |
| 1322 | tosend + 1, type)) < 0) |
| 1323 | return ret; |
| 1324 | |
| 1325 | /* Encrypt the signature received by the server. */ |
| 1326 | ff_rtmpe_encrypt_sig(rt->stream, signature, digest, serverdata[0]); |
| 1327 | } |
| 1328 | |
| 1329 | if (memcmp(signature, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) { |
| 1330 | av_log(s, AV_LOG_ERROR, "Signature mismatch\n"); |
| 1331 | return AVERROR(EIO); |
| 1332 | } |
| 1333 | |
| 1334 | for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++) |
| 1335 | tosend[i] = av_lfg_get(&rnd) >> 24; |
| 1336 | ret = ff_rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0, |
| 1337 | rtmp_player_key, sizeof(rtmp_player_key), |
| 1338 | digest); |
| 1339 | if (ret < 0) |
| 1340 | return ret; |
| 1341 | |
| 1342 | ret = ff_rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0, |
| 1343 | digest, 32, |
| 1344 | tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32); |
| 1345 | if (ret < 0) |
| 1346 | return ret; |
| 1347 | |
| 1348 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1349 | /* Encrypt the signature to be send to the server. */ |
| 1350 | ff_rtmpe_encrypt_sig(rt->stream, tosend + |
| 1351 | RTMP_HANDSHAKE_PACKET_SIZE - 32, digest, |
| 1352 | serverdata[0]); |
| 1353 | } |
| 1354 | |
| 1355 | // write reply back to the server |
| 1356 | if ((ret = ffurl_write(rt->stream, tosend, |
| 1357 | RTMP_HANDSHAKE_PACKET_SIZE)) < 0) |
| 1358 | return ret; |
| 1359 | |
| 1360 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1361 | /* Set RC4 keys for encryption and update the keystreams. */ |
| 1362 | if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0) |
| 1363 | return ret; |
| 1364 | } |
| 1365 | } else { |
| 1366 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1367 | /* Compute the shared secret key sent by the server and initialize |
| 1368 | * the RC4 encryption. */ |
| 1369 | if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1, |
| 1370 | tosend + 1, 1)) < 0) |
| 1371 | return ret; |
| 1372 | |
| 1373 | if (serverdata[0] == 9) { |
| 1374 | /* Encrypt the signature received by the server. */ |
| 1375 | ff_rtmpe_encrypt_sig(rt->stream, signature, digest, |
| 1376 | serverdata[0]); |
| 1377 | } |
| 1378 | } |
| 1379 | |
| 1380 | if ((ret = ffurl_write(rt->stream, serverdata + 1, |
| 1381 | RTMP_HANDSHAKE_PACKET_SIZE)) < 0) |
| 1382 | return ret; |
| 1383 | |
| 1384 | if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) { |
| 1385 | /* Set RC4 keys for encryption and update the keystreams. */ |
| 1386 | if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0) |
| 1387 | return ret; |
| 1388 | } |
| 1389 | } |
| 1390 | |
| 1391 | return 0; |
| 1392 | } |
| 1393 | |
| 1394 | static int rtmp_receive_hs_packet(RTMPContext* rt, uint32_t *first_int, |
| 1395 | uint32_t *second_int, char *arraydata, |
| 1396 | int size) |
| 1397 | { |
| 1398 | int inoutsize; |
| 1399 | |
| 1400 | inoutsize = ffurl_read_complete(rt->stream, arraydata, |
| 1401 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1402 | if (inoutsize <= 0) |
| 1403 | return AVERROR(EIO); |
| 1404 | if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) { |
| 1405 | av_log(rt, AV_LOG_ERROR, "Erroneous Message size %d" |
| 1406 | " not following standard\n", (int)inoutsize); |
| 1407 | return AVERROR(EINVAL); |
| 1408 | } |
| 1409 | |
| 1410 | *first_int = AV_RB32(arraydata); |
| 1411 | *second_int = AV_RB32(arraydata + 4); |
| 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | static int rtmp_send_hs_packet(RTMPContext* rt, uint32_t first_int, |
| 1416 | uint32_t second_int, char *arraydata, int size) |
| 1417 | { |
| 1418 | int inoutsize; |
| 1419 | |
| 1420 | AV_WB32(arraydata, first_int); |
| 1421 | AV_WB32(arraydata + 4, second_int); |
| 1422 | inoutsize = ffurl_write(rt->stream, arraydata, |
| 1423 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1424 | if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) { |
| 1425 | av_log(rt, AV_LOG_ERROR, "Unable to write answer\n"); |
| 1426 | return AVERROR(EIO); |
| 1427 | } |
| 1428 | |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
| 1432 | /** |
| 1433 | * rtmp handshake server side |
| 1434 | */ |
| 1435 | static int rtmp_server_handshake(URLContext *s, RTMPContext *rt) |
| 1436 | { |
| 1437 | uint8_t buffer[RTMP_HANDSHAKE_PACKET_SIZE]; |
| 1438 | uint32_t hs_epoch; |
| 1439 | uint32_t hs_my_epoch; |
| 1440 | uint8_t hs_c1[RTMP_HANDSHAKE_PACKET_SIZE]; |
| 1441 | uint8_t hs_s1[RTMP_HANDSHAKE_PACKET_SIZE]; |
| 1442 | uint32_t zeroes; |
| 1443 | uint32_t temp = 0; |
| 1444 | int randomidx = 0; |
| 1445 | int inoutsize = 0; |
| 1446 | int ret; |
| 1447 | |
| 1448 | inoutsize = ffurl_read_complete(rt->stream, buffer, 1); // Receive C0 |
| 1449 | if (inoutsize <= 0) { |
| 1450 | av_log(s, AV_LOG_ERROR, "Unable to read handshake\n"); |
| 1451 | return AVERROR(EIO); |
| 1452 | } |
| 1453 | // Check Version |
| 1454 | if (buffer[0] != 3) { |
| 1455 | av_log(s, AV_LOG_ERROR, "RTMP protocol version mismatch\n"); |
| 1456 | return AVERROR(EIO); |
| 1457 | } |
| 1458 | if (ffurl_write(rt->stream, buffer, 1) <= 0) { // Send S0 |
| 1459 | av_log(s, AV_LOG_ERROR, |
| 1460 | "Unable to write answer - RTMP S0\n"); |
| 1461 | return AVERROR(EIO); |
| 1462 | } |
| 1463 | /* Receive C1 */ |
| 1464 | ret = rtmp_receive_hs_packet(rt, &hs_epoch, &zeroes, hs_c1, |
| 1465 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1466 | if (ret) { |
| 1467 | av_log(s, AV_LOG_ERROR, "RTMP Handshake C1 Error\n"); |
| 1468 | return ret; |
| 1469 | } |
| 1470 | /* Send S1 */ |
| 1471 | /* By now same epoch will be sent */ |
| 1472 | hs_my_epoch = hs_epoch; |
| 1473 | /* Generate random */ |
| 1474 | for (randomidx = 8; randomidx < (RTMP_HANDSHAKE_PACKET_SIZE); |
| 1475 | randomidx += 4) |
| 1476 | AV_WB32(hs_s1 + randomidx, av_get_random_seed()); |
| 1477 | |
| 1478 | ret = rtmp_send_hs_packet(rt, hs_my_epoch, 0, hs_s1, |
| 1479 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1480 | if (ret) { |
| 1481 | av_log(s, AV_LOG_ERROR, "RTMP Handshake S1 Error\n"); |
| 1482 | return ret; |
| 1483 | } |
| 1484 | /* Send S2 */ |
| 1485 | ret = rtmp_send_hs_packet(rt, hs_epoch, 0, hs_c1, |
| 1486 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1487 | if (ret) { |
| 1488 | av_log(s, AV_LOG_ERROR, "RTMP Handshake S2 Error\n"); |
| 1489 | return ret; |
| 1490 | } |
| 1491 | /* Receive C2 */ |
| 1492 | ret = rtmp_receive_hs_packet(rt, &temp, &zeroes, buffer, |
| 1493 | RTMP_HANDSHAKE_PACKET_SIZE); |
| 1494 | if (ret) { |
| 1495 | av_log(s, AV_LOG_ERROR, "RTMP Handshake C2 Error\n"); |
| 1496 | return ret; |
| 1497 | } |
| 1498 | if (temp != hs_my_epoch) |
| 1499 | av_log(s, AV_LOG_WARNING, |
| 1500 | "Erroneous C2 Message epoch does not match up with C1 epoch\n"); |
| 1501 | if (memcmp(buffer + 8, hs_s1 + 8, |
| 1502 | RTMP_HANDSHAKE_PACKET_SIZE - 8)) |
| 1503 | av_log(s, AV_LOG_WARNING, |
| 1504 | "Erroneous C2 Message random does not match up\n"); |
| 1505 | |
| 1506 | return 0; |
| 1507 | } |
| 1508 | |
| 1509 | static int handle_chunk_size(URLContext *s, RTMPPacket *pkt) |
| 1510 | { |
| 1511 | RTMPContext *rt = s->priv_data; |
| 1512 | int ret; |
| 1513 | |
| 1514 | if (pkt->size < 4) { |
| 1515 | av_log(s, AV_LOG_ERROR, |
| 1516 | "Too short chunk size change packet (%d)\n", |
| 1517 | pkt->size); |
| 1518 | return AVERROR_INVALIDDATA; |
| 1519 | } |
| 1520 | |
| 1521 | if (!rt->is_input) { |
| 1522 | /* Send the same chunk size change packet back to the server, |
| 1523 | * setting the outgoing chunk size to the same as the incoming one. */ |
| 1524 | if ((ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size, |
| 1525 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1])) < 0) |
| 1526 | return ret; |
| 1527 | rt->out_chunk_size = AV_RB32(pkt->data); |
| 1528 | } |
| 1529 | |
| 1530 | rt->in_chunk_size = AV_RB32(pkt->data); |
| 1531 | if (rt->in_chunk_size <= 0) { |
| 1532 | av_log(s, AV_LOG_ERROR, "Incorrect chunk size %d\n", |
| 1533 | rt->in_chunk_size); |
| 1534 | return AVERROR_INVALIDDATA; |
| 1535 | } |
| 1536 | av_log(s, AV_LOG_DEBUG, "New incoming chunk size = %d\n", |
| 1537 | rt->in_chunk_size); |
| 1538 | |
| 1539 | return 0; |
| 1540 | } |
| 1541 | |
| 1542 | static int handle_ping(URLContext *s, RTMPPacket *pkt) |
| 1543 | { |
| 1544 | RTMPContext *rt = s->priv_data; |
| 1545 | int t, ret; |
| 1546 | |
| 1547 | if (pkt->size < 2) { |
| 1548 | av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n", |
| 1549 | pkt->size); |
| 1550 | return AVERROR_INVALIDDATA; |
| 1551 | } |
| 1552 | |
| 1553 | t = AV_RB16(pkt->data); |
| 1554 | if (t == 6) { |
| 1555 | if ((ret = gen_pong(s, rt, pkt)) < 0) |
| 1556 | return ret; |
| 1557 | } else if (t == 26) { |
| 1558 | if (rt->swfsize) { |
| 1559 | if ((ret = gen_swf_verification(s, rt)) < 0) |
| 1560 | return ret; |
| 1561 | } else { |
| 1562 | av_log(s, AV_LOG_WARNING, "Ignoring SWFVerification request.\n"); |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | return 0; |
| 1567 | } |
| 1568 | |
| 1569 | static int handle_client_bw(URLContext *s, RTMPPacket *pkt) |
| 1570 | { |
| 1571 | RTMPContext *rt = s->priv_data; |
| 1572 | |
| 1573 | if (pkt->size < 4) { |
| 1574 | av_log(s, AV_LOG_ERROR, |
| 1575 | "Client bandwidth report packet is less than 4 bytes long (%d)\n", |
| 1576 | pkt->size); |
| 1577 | return AVERROR_INVALIDDATA; |
| 1578 | } |
| 1579 | |
| 1580 | rt->client_report_size = AV_RB32(pkt->data); |
| 1581 | if (rt->client_report_size <= 0) { |
| 1582 | av_log(s, AV_LOG_ERROR, "Incorrect client bandwidth %d\n", |
| 1583 | rt->client_report_size); |
| 1584 | return AVERROR_INVALIDDATA; |
| 1585 | |
| 1586 | } |
| 1587 | av_log(s, AV_LOG_DEBUG, "Client bandwidth = %d\n", rt->client_report_size); |
| 1588 | rt->client_report_size >>= 1; |
| 1589 | |
| 1590 | return 0; |
| 1591 | } |
| 1592 | |
| 1593 | static int handle_server_bw(URLContext *s, RTMPPacket *pkt) |
| 1594 | { |
| 1595 | RTMPContext *rt = s->priv_data; |
| 1596 | |
| 1597 | if (pkt->size < 4) { |
| 1598 | av_log(s, AV_LOG_ERROR, |
| 1599 | "Too short server bandwidth report packet (%d)\n", |
| 1600 | pkt->size); |
| 1601 | return AVERROR_INVALIDDATA; |
| 1602 | } |
| 1603 | |
| 1604 | rt->server_bw = AV_RB32(pkt->data); |
| 1605 | if (rt->server_bw <= 0) { |
| 1606 | av_log(s, AV_LOG_ERROR, "Incorrect server bandwidth %d\n", |
| 1607 | rt->server_bw); |
| 1608 | return AVERROR_INVALIDDATA; |
| 1609 | } |
| 1610 | av_log(s, AV_LOG_DEBUG, "Server bandwidth = %d\n", rt->server_bw); |
| 1611 | |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
| 1615 | static int do_adobe_auth(RTMPContext *rt, const char *user, const char *salt, |
| 1616 | const char *opaque, const char *challenge) |
| 1617 | { |
| 1618 | uint8_t hash[16]; |
| 1619 | char hashstr[AV_BASE64_SIZE(sizeof(hash))], challenge2[10]; |
| 1620 | struct AVMD5 *md5 = av_md5_alloc(); |
| 1621 | if (!md5) |
| 1622 | return AVERROR(ENOMEM); |
| 1623 | |
| 1624 | snprintf(challenge2, sizeof(challenge2), "%08x", av_get_random_seed()); |
| 1625 | |
| 1626 | av_md5_init(md5); |
| 1627 | av_md5_update(md5, user, strlen(user)); |
| 1628 | av_md5_update(md5, salt, strlen(salt)); |
| 1629 | av_md5_update(md5, rt->password, strlen(rt->password)); |
| 1630 | av_md5_final(md5, hash); |
| 1631 | av_base64_encode(hashstr, sizeof(hashstr), hash, |
| 1632 | sizeof(hash)); |
| 1633 | av_md5_init(md5); |
| 1634 | av_md5_update(md5, hashstr, strlen(hashstr)); |
| 1635 | if (opaque) |
| 1636 | av_md5_update(md5, opaque, strlen(opaque)); |
| 1637 | else if (challenge) |
| 1638 | av_md5_update(md5, challenge, strlen(challenge)); |
| 1639 | av_md5_update(md5, challenge2, strlen(challenge2)); |
| 1640 | av_md5_final(md5, hash); |
| 1641 | av_base64_encode(hashstr, sizeof(hashstr), hash, |
| 1642 | sizeof(hash)); |
| 1643 | snprintf(rt->auth_params, sizeof(rt->auth_params), |
| 1644 | "?authmod=%s&user=%s&challenge=%s&response=%s", |
| 1645 | "adobe", user, challenge2, hashstr); |
| 1646 | if (opaque) |
| 1647 | av_strlcatf(rt->auth_params, sizeof(rt->auth_params), |
| 1648 | "&opaque=%s", opaque); |
| 1649 | |
| 1650 | av_free(md5); |
| 1651 | return 0; |
| 1652 | } |
| 1653 | |
| 1654 | static int do_llnw_auth(RTMPContext *rt, const char *user, const char *nonce) |
| 1655 | { |
| 1656 | uint8_t hash[16]; |
| 1657 | char hashstr1[33], hashstr2[33]; |
| 1658 | const char *realm = "live"; |
| 1659 | const char *method = "publish"; |
| 1660 | const char *qop = "auth"; |
| 1661 | const char *nc = "00000001"; |
| 1662 | char cnonce[10]; |
| 1663 | struct AVMD5 *md5 = av_md5_alloc(); |
| 1664 | if (!md5) |
| 1665 | return AVERROR(ENOMEM); |
| 1666 | |
| 1667 | snprintf(cnonce, sizeof(cnonce), "%08x", av_get_random_seed()); |
| 1668 | |
| 1669 | av_md5_init(md5); |
| 1670 | av_md5_update(md5, user, strlen(user)); |
| 1671 | av_md5_update(md5, ":", 1); |
| 1672 | av_md5_update(md5, realm, strlen(realm)); |
| 1673 | av_md5_update(md5, ":", 1); |
| 1674 | av_md5_update(md5, rt->password, strlen(rt->password)); |
| 1675 | av_md5_final(md5, hash); |
| 1676 | ff_data_to_hex(hashstr1, hash, 16, 1); |
| 1677 | hashstr1[32] = '\0'; |
| 1678 | |
| 1679 | av_md5_init(md5); |
| 1680 | av_md5_update(md5, method, strlen(method)); |
| 1681 | av_md5_update(md5, ":/", 2); |
| 1682 | av_md5_update(md5, rt->app, strlen(rt->app)); |
| 1683 | if (!strchr(rt->app, '/')) |
| 1684 | av_md5_update(md5, "/_definst_", strlen("/_definst_")); |
| 1685 | av_md5_final(md5, hash); |
| 1686 | ff_data_to_hex(hashstr2, hash, 16, 1); |
| 1687 | hashstr2[32] = '\0'; |
| 1688 | |
| 1689 | av_md5_init(md5); |
| 1690 | av_md5_update(md5, hashstr1, strlen(hashstr1)); |
| 1691 | av_md5_update(md5, ":", 1); |
| 1692 | if (nonce) |
| 1693 | av_md5_update(md5, nonce, strlen(nonce)); |
| 1694 | av_md5_update(md5, ":", 1); |
| 1695 | av_md5_update(md5, nc, strlen(nc)); |
| 1696 | av_md5_update(md5, ":", 1); |
| 1697 | av_md5_update(md5, cnonce, strlen(cnonce)); |
| 1698 | av_md5_update(md5, ":", 1); |
| 1699 | av_md5_update(md5, qop, strlen(qop)); |
| 1700 | av_md5_update(md5, ":", 1); |
| 1701 | av_md5_update(md5, hashstr2, strlen(hashstr2)); |
| 1702 | av_md5_final(md5, hash); |
| 1703 | ff_data_to_hex(hashstr1, hash, 16, 1); |
| 1704 | |
| 1705 | snprintf(rt->auth_params, sizeof(rt->auth_params), |
| 1706 | "?authmod=%s&user=%s&nonce=%s&cnonce=%s&nc=%s&response=%s", |
| 1707 | "llnw", user, nonce, cnonce, nc, hashstr1); |
| 1708 | |
| 1709 | av_free(md5); |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | static int handle_connect_error(URLContext *s, const char *desc) |
| 1714 | { |
| 1715 | RTMPContext *rt = s->priv_data; |
| 1716 | char buf[300], *ptr, authmod[15]; |
| 1717 | int i = 0, ret = 0; |
| 1718 | const char *user = "", *salt = "", *opaque = NULL, |
| 1719 | *challenge = NULL, *cptr = NULL, *nonce = NULL; |
| 1720 | |
| 1721 | if (!(cptr = strstr(desc, "authmod=adobe")) && |
| 1722 | !(cptr = strstr(desc, "authmod=llnw"))) { |
| 1723 | av_log(s, AV_LOG_ERROR, |
| 1724 | "Unknown connect error (unsupported authentication method?)\n"); |
| 1725 | return AVERROR_UNKNOWN; |
| 1726 | } |
| 1727 | cptr += strlen("authmod="); |
| 1728 | while (*cptr && *cptr != ' ' && i < sizeof(authmod) - 1) |
| 1729 | authmod[i++] = *cptr++; |
| 1730 | authmod[i] = '\0'; |
| 1731 | |
| 1732 | if (!rt->username[0] || !rt->password[0]) { |
| 1733 | av_log(s, AV_LOG_ERROR, "No credentials set\n"); |
| 1734 | return AVERROR_UNKNOWN; |
| 1735 | } |
| 1736 | |
| 1737 | if (strstr(desc, "?reason=authfailed")) { |
| 1738 | av_log(s, AV_LOG_ERROR, "Incorrect username/password\n"); |
| 1739 | return AVERROR_UNKNOWN; |
| 1740 | } else if (strstr(desc, "?reason=nosuchuser")) { |
| 1741 | av_log(s, AV_LOG_ERROR, "Incorrect username\n"); |
| 1742 | return AVERROR_UNKNOWN; |
| 1743 | } |
| 1744 | |
| 1745 | if (rt->auth_tried) { |
| 1746 | av_log(s, AV_LOG_ERROR, "Authentication failed\n"); |
| 1747 | return AVERROR_UNKNOWN; |
| 1748 | } |
| 1749 | |
| 1750 | rt->auth_params[0] = '\0'; |
| 1751 | |
| 1752 | if (strstr(desc, "code=403 need auth")) { |
| 1753 | snprintf(rt->auth_params, sizeof(rt->auth_params), |
| 1754 | "?authmod=%s&user=%s", authmod, rt->username); |
| 1755 | return 0; |
| 1756 | } |
| 1757 | |
| 1758 | if (!(cptr = strstr(desc, "?reason=needauth"))) { |
| 1759 | av_log(s, AV_LOG_ERROR, "No auth parameters found\n"); |
| 1760 | return AVERROR_UNKNOWN; |
| 1761 | } |
| 1762 | |
| 1763 | av_strlcpy(buf, cptr + 1, sizeof(buf)); |
| 1764 | ptr = buf; |
| 1765 | |
| 1766 | while (ptr) { |
| 1767 | char *next = strchr(ptr, '&'); |
| 1768 | char *value = strchr(ptr, '='); |
| 1769 | if (next) |
| 1770 | *next++ = '\0'; |
| 1771 | if (value) { |
| 1772 | *value++ = '\0'; |
| 1773 | if (!strcmp(ptr, "user")) { |
| 1774 | user = value; |
| 1775 | } else if (!strcmp(ptr, "salt")) { |
| 1776 | salt = value; |
| 1777 | } else if (!strcmp(ptr, "opaque")) { |
| 1778 | opaque = value; |
| 1779 | } else if (!strcmp(ptr, "challenge")) { |
| 1780 | challenge = value; |
| 1781 | } else if (!strcmp(ptr, "nonce")) { |
| 1782 | nonce = value; |
| 1783 | } else { |
| 1784 | av_log(s, AV_LOG_INFO, "Ignoring unsupported var %s\n", ptr); |
| 1785 | } |
| 1786 | } else { |
| 1787 | av_log(s, AV_LOG_WARNING, "Variable %s has NULL value\n", ptr); |
| 1788 | } |
| 1789 | ptr = next; |
| 1790 | } |
| 1791 | |
| 1792 | if (!strcmp(authmod, "adobe")) { |
| 1793 | if ((ret = do_adobe_auth(rt, user, salt, opaque, challenge)) < 0) |
| 1794 | return ret; |
| 1795 | } else { |
| 1796 | if ((ret = do_llnw_auth(rt, user, nonce)) < 0) |
| 1797 | return ret; |
| 1798 | } |
| 1799 | |
| 1800 | rt->auth_tried = 1; |
| 1801 | return 0; |
| 1802 | } |
| 1803 | |
| 1804 | static int handle_invoke_error(URLContext *s, RTMPPacket *pkt) |
| 1805 | { |
| 1806 | RTMPContext *rt = s->priv_data; |
| 1807 | const uint8_t *data_end = pkt->data + pkt->size; |
| 1808 | char *tracked_method = NULL; |
| 1809 | int level = AV_LOG_ERROR; |
| 1810 | uint8_t tmpstr[256]; |
| 1811 | int ret; |
| 1812 | |
| 1813 | if ((ret = find_tracked_method(s, pkt, 9, &tracked_method)) < 0) |
| 1814 | return ret; |
| 1815 | |
| 1816 | if (!ff_amf_get_field_value(pkt->data + 9, data_end, |
| 1817 | "description", tmpstr, sizeof(tmpstr))) { |
| 1818 | if (tracked_method && (!strcmp(tracked_method, "_checkbw") || |
| 1819 | !strcmp(tracked_method, "releaseStream") || |
| 1820 | !strcmp(tracked_method, "FCSubscribe") || |
| 1821 | !strcmp(tracked_method, "FCPublish"))) { |
| 1822 | /* Gracefully ignore Adobe-specific historical artifact errors. */ |
| 1823 | level = AV_LOG_WARNING; |
| 1824 | ret = 0; |
| 1825 | } else if (tracked_method && !strcmp(tracked_method, "getStreamLength")) { |
| 1826 | level = rt->live ? AV_LOG_DEBUG : AV_LOG_WARNING; |
| 1827 | ret = 0; |
| 1828 | } else if (tracked_method && !strcmp(tracked_method, "connect")) { |
| 1829 | ret = handle_connect_error(s, tmpstr); |
| 1830 | if (!ret) { |
| 1831 | rt->do_reconnect = 1; |
| 1832 | level = AV_LOG_VERBOSE; |
| 1833 | } |
| 1834 | } else |
| 1835 | ret = AVERROR_UNKNOWN; |
| 1836 | av_log(s, level, "Server error: %s\n", tmpstr); |
| 1837 | } |
| 1838 | |
| 1839 | av_free(tracked_method); |
| 1840 | return ret; |
| 1841 | } |
| 1842 | |
| 1843 | static int write_begin(URLContext *s) |
| 1844 | { |
| 1845 | RTMPContext *rt = s->priv_data; |
| 1846 | PutByteContext pbc; |
| 1847 | RTMPPacket spkt = { 0 }; |
| 1848 | int ret; |
| 1849 | |
| 1850 | // Send Stream Begin 1 |
| 1851 | if ((ret = ff_rtmp_packet_create(&spkt, RTMP_NETWORK_CHANNEL, |
| 1852 | RTMP_PT_PING, 0, 6)) < 0) { |
| 1853 | av_log(s, AV_LOG_ERROR, "Unable to create response packet\n"); |
| 1854 | return ret; |
| 1855 | } |
| 1856 | |
| 1857 | bytestream2_init_writer(&pbc, spkt.data, spkt.size); |
| 1858 | bytestream2_put_be16(&pbc, 0); // 0 -> Stream Begin |
| 1859 | bytestream2_put_be32(&pbc, rt->nb_streamid); |
| 1860 | |
| 1861 | ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size, |
| 1862 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 1863 | |
| 1864 | ff_rtmp_packet_destroy(&spkt); |
| 1865 | |
| 1866 | return ret; |
| 1867 | } |
| 1868 | |
| 1869 | static int write_status(URLContext *s, RTMPPacket *pkt, |
| 1870 | const char *status, const char *filename) |
| 1871 | { |
| 1872 | RTMPContext *rt = s->priv_data; |
| 1873 | RTMPPacket spkt = { 0 }; |
| 1874 | char statusmsg[128]; |
| 1875 | uint8_t *pp; |
| 1876 | int ret; |
| 1877 | |
| 1878 | if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL, |
| 1879 | RTMP_PT_INVOKE, 0, |
| 1880 | RTMP_PKTDATA_DEFAULT_SIZE)) < 0) { |
| 1881 | av_log(s, AV_LOG_ERROR, "Unable to create response packet\n"); |
| 1882 | return ret; |
| 1883 | } |
| 1884 | |
| 1885 | pp = spkt.data; |
| 1886 | spkt.extra = pkt->extra; |
| 1887 | ff_amf_write_string(&pp, "onStatus"); |
| 1888 | ff_amf_write_number(&pp, 0); |
| 1889 | ff_amf_write_null(&pp); |
| 1890 | |
| 1891 | ff_amf_write_object_start(&pp); |
| 1892 | ff_amf_write_field_name(&pp, "level"); |
| 1893 | ff_amf_write_string(&pp, "status"); |
| 1894 | ff_amf_write_field_name(&pp, "code"); |
| 1895 | ff_amf_write_string(&pp, status); |
| 1896 | ff_amf_write_field_name(&pp, "description"); |
| 1897 | snprintf(statusmsg, sizeof(statusmsg), |
| 1898 | "%s is now published", filename); |
| 1899 | ff_amf_write_string(&pp, statusmsg); |
| 1900 | ff_amf_write_field_name(&pp, "details"); |
| 1901 | ff_amf_write_string(&pp, filename); |
| 1902 | ff_amf_write_field_name(&pp, "clientid"); |
| 1903 | snprintf(statusmsg, sizeof(statusmsg), "%s", LIBAVFORMAT_IDENT); |
| 1904 | ff_amf_write_string(&pp, statusmsg); |
| 1905 | ff_amf_write_object_end(&pp); |
| 1906 | |
| 1907 | spkt.size = pp - spkt.data; |
| 1908 | ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size, |
| 1909 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 1910 | ff_rtmp_packet_destroy(&spkt); |
| 1911 | |
| 1912 | return ret; |
| 1913 | } |
| 1914 | |
| 1915 | static int send_invoke_response(URLContext *s, RTMPPacket *pkt) |
| 1916 | { |
| 1917 | RTMPContext *rt = s->priv_data; |
| 1918 | double seqnum; |
| 1919 | char filename[64]; |
| 1920 | char command[64]; |
| 1921 | int stringlen; |
| 1922 | char *pchar; |
| 1923 | const uint8_t *p = pkt->data; |
| 1924 | uint8_t *pp = NULL; |
| 1925 | RTMPPacket spkt = { 0 }; |
| 1926 | GetByteContext gbc; |
| 1927 | int ret; |
| 1928 | |
| 1929 | bytestream2_init(&gbc, p, pkt->size); |
| 1930 | if (ff_amf_read_string(&gbc, command, sizeof(command), |
| 1931 | &stringlen)) { |
| 1932 | av_log(s, AV_LOG_ERROR, "Error in PT_INVOKE\n"); |
| 1933 | return AVERROR_INVALIDDATA; |
| 1934 | } |
| 1935 | |
| 1936 | ret = ff_amf_read_number(&gbc, &seqnum); |
| 1937 | if (ret) |
| 1938 | return ret; |
| 1939 | ret = ff_amf_read_null(&gbc); |
| 1940 | if (ret) |
| 1941 | return ret; |
| 1942 | if (!strcmp(command, "FCPublish") || |
| 1943 | !strcmp(command, "publish")) { |
| 1944 | ret = ff_amf_read_string(&gbc, filename, |
| 1945 | sizeof(filename), &stringlen); |
| 1946 | // check with url |
| 1947 | if (s->filename) { |
| 1948 | pchar = strrchr(s->filename, '/'); |
| 1949 | if (!pchar) { |
| 1950 | av_log(s, AV_LOG_WARNING, |
| 1951 | "Unable to find / in url %s, bad format\n", |
| 1952 | s->filename); |
| 1953 | pchar = s->filename; |
| 1954 | } |
| 1955 | pchar++; |
| 1956 | if (strcmp(pchar, filename)) |
| 1957 | av_log(s, AV_LOG_WARNING, "Unexpected stream %s, expecting" |
| 1958 | " %s\n", filename, pchar); |
| 1959 | } |
| 1960 | rt->state = STATE_RECEIVING; |
| 1961 | } |
| 1962 | |
| 1963 | if (!strcmp(command, "FCPublish")) { |
| 1964 | if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL, |
| 1965 | RTMP_PT_INVOKE, 0, |
| 1966 | RTMP_PKTDATA_DEFAULT_SIZE)) < 0) { |
| 1967 | av_log(s, AV_LOG_ERROR, "Unable to create response packet\n"); |
| 1968 | return ret; |
| 1969 | } |
| 1970 | pp = spkt.data; |
| 1971 | ff_amf_write_string(&pp, "onFCPublish"); |
| 1972 | } else if (!strcmp(command, "publish")) { |
| 1973 | ret = write_begin(s); |
| 1974 | if (ret < 0) |
| 1975 | return ret; |
| 1976 | |
| 1977 | // Send onStatus(NetStream.Publish.Start) |
| 1978 | return write_status(s, pkt, "NetStream.Publish.Start", |
| 1979 | filename); |
| 1980 | } else if (!strcmp(command, "play")) { |
| 1981 | ret = write_begin(s); |
| 1982 | if (ret < 0) |
| 1983 | return ret; |
| 1984 | rt->state = STATE_SENDING; |
| 1985 | return write_status(s, pkt, "NetStream.Play.Start", |
| 1986 | filename); |
| 1987 | } else { |
| 1988 | if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL, |
| 1989 | RTMP_PT_INVOKE, 0, |
| 1990 | RTMP_PKTDATA_DEFAULT_SIZE)) < 0) { |
| 1991 | av_log(s, AV_LOG_ERROR, "Unable to create response packet\n"); |
| 1992 | return ret; |
| 1993 | } |
| 1994 | pp = spkt.data; |
| 1995 | ff_amf_write_string(&pp, "_result"); |
| 1996 | ff_amf_write_number(&pp, seqnum); |
| 1997 | ff_amf_write_null(&pp); |
| 1998 | if (!strcmp(command, "createStream")) { |
| 1999 | rt->nb_streamid++; |
| 2000 | if (rt->nb_streamid == 0 || rt->nb_streamid == 2) |
| 2001 | rt->nb_streamid++; /* Values 0 and 2 are reserved */ |
| 2002 | ff_amf_write_number(&pp, rt->nb_streamid); |
| 2003 | /* By now we don't control which streams are removed in |
| 2004 | * deleteStream. There is no stream creation control |
| 2005 | * if a client creates more than 2^32 - 2 streams. */ |
| 2006 | } |
| 2007 | } |
| 2008 | spkt.size = pp - spkt.data; |
| 2009 | ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size, |
| 2010 | &rt->prev_pkt[1], &rt->nb_prev_pkt[1]); |
| 2011 | ff_rtmp_packet_destroy(&spkt); |
| 2012 | return ret; |
| 2013 | } |
| 2014 | |
| 2015 | /** |
| 2016 | * Read the AMF_NUMBER response ("_result") to a function call |
| 2017 | * (e.g. createStream()). This response should be made up of the AMF_STRING |
| 2018 | * "result", a NULL object and then the response encoded as AMF_NUMBER. On a |
| 2019 | * successful response, we will return set the value to number (otherwise number |
| 2020 | * will not be changed). |
| 2021 | * |
| 2022 | * @return 0 if reading the value succeeds, negative value otherwiss |
| 2023 | */ |
| 2024 | static int read_number_result(RTMPPacket *pkt, double *number) |
| 2025 | { |
| 2026 | // We only need to fit "_result" in this. |
| 2027 | uint8_t strbuffer[8]; |
| 2028 | int stringlen; |
| 2029 | double numbuffer; |
| 2030 | GetByteContext gbc; |
| 2031 | |
| 2032 | bytestream2_init(&gbc, pkt->data, pkt->size); |
| 2033 | |
| 2034 | // Value 1/4: "_result" as AMF_STRING |
| 2035 | if (ff_amf_read_string(&gbc, strbuffer, sizeof(strbuffer), &stringlen)) |
| 2036 | return AVERROR_INVALIDDATA; |
| 2037 | if (strcmp(strbuffer, "_result")) |
| 2038 | return AVERROR_INVALIDDATA; |
| 2039 | // Value 2/4: The callee reference number |
| 2040 | if (ff_amf_read_number(&gbc, &numbuffer)) |
| 2041 | return AVERROR_INVALIDDATA; |
| 2042 | // Value 3/4: Null |
| 2043 | if (ff_amf_read_null(&gbc)) |
| 2044 | return AVERROR_INVALIDDATA; |
| 2045 | // Value 4/4: The resonse as AMF_NUMBER |
| 2046 | if (ff_amf_read_number(&gbc, &numbuffer)) |
| 2047 | return AVERROR_INVALIDDATA; |
| 2048 | else |
| 2049 | *number = numbuffer; |
| 2050 | |
| 2051 | return 0; |
| 2052 | } |
| 2053 | |
| 2054 | static int handle_invoke_result(URLContext *s, RTMPPacket *pkt) |
| 2055 | { |
| 2056 | RTMPContext *rt = s->priv_data; |
| 2057 | char *tracked_method = NULL; |
| 2058 | int ret = 0; |
| 2059 | |
| 2060 | if ((ret = find_tracked_method(s, pkt, 10, &tracked_method)) < 0) |
| 2061 | return ret; |
| 2062 | |
| 2063 | if (!tracked_method) { |
| 2064 | /* Ignore this reply when the current method is not tracked. */ |
| 2065 | return ret; |
| 2066 | } |
| 2067 | |
| 2068 | if (!strcmp(tracked_method, "connect")) { |
| 2069 | if (!rt->is_input) { |
| 2070 | if ((ret = gen_release_stream(s, rt)) < 0) |
| 2071 | goto fail; |
| 2072 | |
| 2073 | if ((ret = gen_fcpublish_stream(s, rt)) < 0) |
| 2074 | goto fail; |
| 2075 | } else { |
| 2076 | if ((ret = gen_server_bw(s, rt)) < 0) |
| 2077 | goto fail; |
| 2078 | } |
| 2079 | |
| 2080 | if ((ret = gen_create_stream(s, rt)) < 0) |
| 2081 | goto fail; |
| 2082 | |
| 2083 | if (rt->is_input) { |
| 2084 | /* Send the FCSubscribe command when the name of live |
| 2085 | * stream is defined by the user or if it's a live stream. */ |
| 2086 | if (rt->subscribe) { |
| 2087 | if ((ret = gen_fcsubscribe_stream(s, rt, rt->subscribe)) < 0) |
| 2088 | goto fail; |
| 2089 | } else if (rt->live == -1) { |
| 2090 | if ((ret = gen_fcsubscribe_stream(s, rt, rt->playpath)) < 0) |
| 2091 | goto fail; |
| 2092 | } |
| 2093 | } |
| 2094 | } else if (!strcmp(tracked_method, "createStream")) { |
| 2095 | double stream_id; |
| 2096 | if (read_number_result(pkt, &stream_id)) { |
| 2097 | av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n"); |
| 2098 | } else { |
| 2099 | rt->stream_id = stream_id; |
| 2100 | } |
| 2101 | |
| 2102 | if (!rt->is_input) { |
| 2103 | if ((ret = gen_publish(s, rt)) < 0) |
| 2104 | goto fail; |
| 2105 | } else { |
| 2106 | if (rt->live != -1) { |
| 2107 | if ((ret = gen_get_stream_length(s, rt)) < 0) |
| 2108 | goto fail; |
| 2109 | } |
| 2110 | if ((ret = gen_play(s, rt)) < 0) |
| 2111 | goto fail; |
| 2112 | if ((ret = gen_buffer_time(s, rt)) < 0) |
| 2113 | goto fail; |
| 2114 | } |
| 2115 | } else if (!strcmp(tracked_method, "getStreamLength")) { |
| 2116 | if (read_number_result(pkt, &rt->duration)) { |
| 2117 | av_log(s, AV_LOG_WARNING, "Unexpected reply on getStreamLength()\n"); |
| 2118 | } |
| 2119 | } |
| 2120 | |
| 2121 | fail: |
| 2122 | av_free(tracked_method); |
| 2123 | return ret; |
| 2124 | } |
| 2125 | |
| 2126 | static int handle_invoke_status(URLContext *s, RTMPPacket *pkt) |
| 2127 | { |
| 2128 | RTMPContext *rt = s->priv_data; |
| 2129 | const uint8_t *data_end = pkt->data + pkt->size; |
| 2130 | const uint8_t *ptr = pkt->data + RTMP_HEADER; |
| 2131 | uint8_t tmpstr[256]; |
| 2132 | int i, t; |
| 2133 | |
| 2134 | for (i = 0; i < 2; i++) { |
| 2135 | t = ff_amf_tag_size(ptr, data_end); |
| 2136 | if (t < 0) |
| 2137 | return 1; |
| 2138 | ptr += t; |
| 2139 | } |
| 2140 | |
| 2141 | t = ff_amf_get_field_value(ptr, data_end, "level", tmpstr, sizeof(tmpstr)); |
| 2142 | if (!t && !strcmp(tmpstr, "error")) { |
| 2143 | t = ff_amf_get_field_value(ptr, data_end, |
| 2144 | "description", tmpstr, sizeof(tmpstr)); |
| 2145 | if (t || !tmpstr[0]) |
| 2146 | t = ff_amf_get_field_value(ptr, data_end, "code", |
| 2147 | tmpstr, sizeof(tmpstr)); |
| 2148 | if (!t) |
| 2149 | av_log(s, AV_LOG_ERROR, "Server error: %s\n", tmpstr); |
| 2150 | return -1; |
| 2151 | } |
| 2152 | |
| 2153 | t = ff_amf_get_field_value(ptr, data_end, "code", tmpstr, sizeof(tmpstr)); |
| 2154 | if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING; |
| 2155 | if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED; |
| 2156 | if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED; |
| 2157 | if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING; |
| 2158 | if (!t && !strcmp(tmpstr, "NetStream.Seek.Notify")) rt->state = STATE_PLAYING; |
| 2159 | |
| 2160 | return 0; |
| 2161 | } |
| 2162 | |
| 2163 | static int handle_invoke(URLContext *s, RTMPPacket *pkt) |
| 2164 | { |
| 2165 | RTMPContext *rt = s->priv_data; |
| 2166 | int ret = 0; |
| 2167 | |
| 2168 | //TODO: check for the messages sent for wrong state? |
| 2169 | if (ff_amf_match_string(pkt->data, pkt->size, "_error")) { |
| 2170 | if ((ret = handle_invoke_error(s, pkt)) < 0) |
| 2171 | return ret; |
| 2172 | } else if (ff_amf_match_string(pkt->data, pkt->size, "_result")) { |
| 2173 | if ((ret = handle_invoke_result(s, pkt)) < 0) |
| 2174 | return ret; |
| 2175 | } else if (ff_amf_match_string(pkt->data, pkt->size, "onStatus")) { |
| 2176 | if ((ret = handle_invoke_status(s, pkt)) < 0) |
| 2177 | return ret; |
| 2178 | } else if (ff_amf_match_string(pkt->data, pkt->size, "onBWDone")) { |
| 2179 | if ((ret = gen_check_bw(s, rt)) < 0) |
| 2180 | return ret; |
| 2181 | } else if (ff_amf_match_string(pkt->data, pkt->size, "releaseStream") || |
| 2182 | ff_amf_match_string(pkt->data, pkt->size, "FCPublish") || |
| 2183 | ff_amf_match_string(pkt->data, pkt->size, "publish") || |
| 2184 | ff_amf_match_string(pkt->data, pkt->size, "play") || |
| 2185 | ff_amf_match_string(pkt->data, pkt->size, "_checkbw") || |
| 2186 | ff_amf_match_string(pkt->data, pkt->size, "createStream")) { |
| 2187 | if ((ret = send_invoke_response(s, pkt)) < 0) |
| 2188 | return ret; |
| 2189 | } |
| 2190 | |
| 2191 | return ret; |
| 2192 | } |
| 2193 | |
| 2194 | static int update_offset(RTMPContext *rt, int size) |
| 2195 | { |
| 2196 | int old_flv_size; |
| 2197 | |
| 2198 | // generate packet header and put data into buffer for FLV demuxer |
| 2199 | if (rt->flv_off < rt->flv_size) { |
| 2200 | // There is old unread data in the buffer, thus append at the end |
| 2201 | old_flv_size = rt->flv_size; |
| 2202 | rt->flv_size += size; |
| 2203 | } else { |
| 2204 | // All data has been read, write the new data at the start of the buffer |
| 2205 | old_flv_size = 0; |
| 2206 | rt->flv_size = size; |
| 2207 | rt->flv_off = 0; |
| 2208 | } |
| 2209 | |
| 2210 | return old_flv_size; |
| 2211 | } |
| 2212 | |
| 2213 | static int append_flv_data(RTMPContext *rt, RTMPPacket *pkt, int skip) |
| 2214 | { |
| 2215 | int old_flv_size, ret; |
| 2216 | PutByteContext pbc; |
| 2217 | const uint8_t *data = pkt->data + skip; |
| 2218 | const int size = pkt->size - skip; |
| 2219 | uint32_t ts = pkt->timestamp; |
| 2220 | |
| 2221 | if (pkt->type == RTMP_PT_AUDIO) { |
| 2222 | rt->has_audio = 1; |
| 2223 | } else if (pkt->type == RTMP_PT_VIDEO) { |
| 2224 | rt->has_video = 1; |
| 2225 | } |
| 2226 | |
| 2227 | old_flv_size = update_offset(rt, size + 15); |
| 2228 | |
| 2229 | if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) { |
| 2230 | rt->flv_size = rt->flv_off = 0; |
| 2231 | return ret; |
| 2232 | } |
| 2233 | bytestream2_init_writer(&pbc, rt->flv_data, rt->flv_size); |
| 2234 | bytestream2_skip_p(&pbc, old_flv_size); |
| 2235 | bytestream2_put_byte(&pbc, pkt->type); |
| 2236 | bytestream2_put_be24(&pbc, size); |
| 2237 | bytestream2_put_be24(&pbc, ts); |
| 2238 | bytestream2_put_byte(&pbc, ts >> 24); |
| 2239 | bytestream2_put_be24(&pbc, 0); |
| 2240 | bytestream2_put_buffer(&pbc, data, size); |
| 2241 | bytestream2_put_be32(&pbc, 0); |
| 2242 | |
| 2243 | return 0; |
| 2244 | } |
| 2245 | |
| 2246 | static int handle_notify(URLContext *s, RTMPPacket *pkt) |
| 2247 | { |
| 2248 | RTMPContext *rt = s->priv_data; |
| 2249 | uint8_t commandbuffer[64]; |
| 2250 | char statusmsg[128]; |
| 2251 | int stringlen, ret, skip = 0; |
| 2252 | GetByteContext gbc; |
| 2253 | |
| 2254 | bytestream2_init(&gbc, pkt->data, pkt->size); |
| 2255 | if (ff_amf_read_string(&gbc, commandbuffer, sizeof(commandbuffer), |
| 2256 | &stringlen)) |
| 2257 | return AVERROR_INVALIDDATA; |
| 2258 | |
| 2259 | if (!strcmp(commandbuffer, "onMetaData")) { |
| 2260 | // metadata properties should be stored in a mixed array |
| 2261 | if (bytestream2_get_byte(&gbc) == AMF_DATA_TYPE_MIXEDARRAY) { |
| 2262 | // We have found a metaData Array so flv can determine the streams |
| 2263 | // from this. |
| 2264 | rt->received_metadata = 1; |
| 2265 | // skip 32-bit max array index |
| 2266 | bytestream2_skip(&gbc, 4); |
| 2267 | while (bytestream2_get_bytes_left(&gbc) > 3) { |
| 2268 | if (ff_amf_get_string(&gbc, statusmsg, sizeof(statusmsg), |
| 2269 | &stringlen)) |
| 2270 | return AVERROR_INVALIDDATA; |
| 2271 | // We do not care about the content of the property (yet). |
| 2272 | stringlen = ff_amf_tag_size(gbc.buffer, gbc.buffer_end); |
| 2273 | if (stringlen < 0) |
| 2274 | return AVERROR_INVALIDDATA; |
| 2275 | bytestream2_skip(&gbc, stringlen); |
| 2276 | |
| 2277 | // The presence of the following properties indicates that the |
| 2278 | // respective streams are present. |
| 2279 | if (!strcmp(statusmsg, "videocodecid")) { |
| 2280 | rt->has_video = 1; |
| 2281 | } |
| 2282 | if (!strcmp(statusmsg, "audiocodecid")) { |
| 2283 | rt->has_audio = 1; |
| 2284 | } |
| 2285 | } |
| 2286 | if (bytestream2_get_be24(&gbc) != AMF_END_OF_OBJECT) |
| 2287 | return AVERROR_INVALIDDATA; |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | // Skip the @setDataFrame string and validate it is a notification |
| 2292 | if (!strcmp(commandbuffer, "@setDataFrame")) { |
| 2293 | skip = gbc.buffer - pkt->data; |
| 2294 | ret = ff_amf_read_string(&gbc, statusmsg, |
| 2295 | sizeof(statusmsg), &stringlen); |
| 2296 | if (ret < 0) |
| 2297 | return AVERROR_INVALIDDATA; |
| 2298 | } |
| 2299 | |
| 2300 | return append_flv_data(rt, pkt, skip); |
| 2301 | } |
| 2302 | |
| 2303 | /** |
| 2304 | * Parse received packet and possibly perform some action depending on |
| 2305 | * the packet contents. |
| 2306 | * @return 0 for no errors, negative values for serious errors which prevent |
| 2307 | * further communications, positive values for uncritical errors |
| 2308 | */ |
| 2309 | static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt) |
| 2310 | { |
| 2311 | int ret; |
| 2312 | |
| 2313 | #ifdef DEBUG |
| 2314 | ff_rtmp_packet_dump(s, pkt); |
| 2315 | #endif |
| 2316 | |
| 2317 | switch (pkt->type) { |
| 2318 | case RTMP_PT_BYTES_READ: |
| 2319 | av_dlog(s, "received bytes read report\n"); |
| 2320 | break; |
| 2321 | case RTMP_PT_CHUNK_SIZE: |
| 2322 | if ((ret = handle_chunk_size(s, pkt)) < 0) |
| 2323 | return ret; |
| 2324 | break; |
| 2325 | case RTMP_PT_PING: |
| 2326 | if ((ret = handle_ping(s, pkt)) < 0) |
| 2327 | return ret; |
| 2328 | break; |
| 2329 | case RTMP_PT_CLIENT_BW: |
| 2330 | if ((ret = handle_client_bw(s, pkt)) < 0) |
| 2331 | return ret; |
| 2332 | break; |
| 2333 | case RTMP_PT_SERVER_BW: |
| 2334 | if ((ret = handle_server_bw(s, pkt)) < 0) |
| 2335 | return ret; |
| 2336 | break; |
| 2337 | case RTMP_PT_INVOKE: |
| 2338 | if ((ret = handle_invoke(s, pkt)) < 0) |
| 2339 | return ret; |
| 2340 | break; |
| 2341 | case RTMP_PT_VIDEO: |
| 2342 | case RTMP_PT_AUDIO: |
| 2343 | case RTMP_PT_METADATA: |
| 2344 | case RTMP_PT_NOTIFY: |
| 2345 | /* Audio, Video and Metadata packets are parsed in get_packet() */ |
| 2346 | break; |
| 2347 | default: |
| 2348 | av_log(s, AV_LOG_VERBOSE, "Unknown packet type received 0x%02X\n", pkt->type); |
| 2349 | break; |
| 2350 | } |
| 2351 | return 0; |
| 2352 | } |
| 2353 | |
| 2354 | static int handle_metadata(RTMPContext *rt, RTMPPacket *pkt) |
| 2355 | { |
| 2356 | int ret, old_flv_size, type; |
| 2357 | const uint8_t *next; |
| 2358 | uint8_t *p; |
| 2359 | uint32_t size; |
| 2360 | uint32_t ts, cts, pts = 0; |
| 2361 | |
| 2362 | old_flv_size = update_offset(rt, pkt->size); |
| 2363 | |
| 2364 | if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) { |
| 2365 | rt->flv_size = rt->flv_off = 0; |
| 2366 | return ret; |
| 2367 | } |
| 2368 | |
| 2369 | next = pkt->data; |
| 2370 | p = rt->flv_data + old_flv_size; |
| 2371 | |
| 2372 | /* copy data while rewriting timestamps */ |
| 2373 | ts = pkt->timestamp; |
| 2374 | |
| 2375 | while (next - pkt->data < pkt->size - RTMP_HEADER) { |
| 2376 | type = bytestream_get_byte(&next); |
| 2377 | size = bytestream_get_be24(&next); |
| 2378 | cts = bytestream_get_be24(&next); |
| 2379 | cts |= bytestream_get_byte(&next) << 24; |
| 2380 | if (!pts) |
| 2381 | pts = cts; |
| 2382 | ts += cts - pts; |
| 2383 | pts = cts; |
| 2384 | if (size + 3 + 4 > pkt->data + pkt->size - next) |
| 2385 | break; |
| 2386 | bytestream_put_byte(&p, type); |
| 2387 | bytestream_put_be24(&p, size); |
| 2388 | bytestream_put_be24(&p, ts); |
| 2389 | bytestream_put_byte(&p, ts >> 24); |
| 2390 | memcpy(p, next, size + 3 + 4); |
| 2391 | next += size + 3 + 4; |
| 2392 | p += size + 3 + 4; |
| 2393 | } |
| 2394 | if (p != rt->flv_data + rt->flv_size) { |
| 2395 | av_log(NULL, AV_LOG_WARNING, "Incomplete flv packets in " |
| 2396 | "RTMP_PT_METADATA packet\n"); |
| 2397 | rt->flv_size = p - rt->flv_data; |
| 2398 | } |
| 2399 | |
| 2400 | return 0; |
| 2401 | } |
| 2402 | |
| 2403 | /** |
| 2404 | * Interact with the server by receiving and sending RTMP packets until |
| 2405 | * there is some significant data (media data or expected status notification). |
| 2406 | * |
| 2407 | * @param s reading context |
| 2408 | * @param for_header non-zero value tells function to work until it |
| 2409 | * gets notification from the server that playing has been started, |
| 2410 | * otherwise function will work until some media data is received (or |
| 2411 | * an error happens) |
| 2412 | * @return 0 for successful operation, negative value in case of error |
| 2413 | */ |
| 2414 | static int get_packet(URLContext *s, int for_header) |
| 2415 | { |
| 2416 | RTMPContext *rt = s->priv_data; |
| 2417 | int ret; |
| 2418 | |
| 2419 | if (rt->state == STATE_STOPPED) |
| 2420 | return AVERROR_EOF; |
| 2421 | |
| 2422 | for (;;) { |
| 2423 | RTMPPacket rpkt = { 0 }; |
| 2424 | if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt, |
| 2425 | rt->in_chunk_size, &rt->prev_pkt[0], |
| 2426 | &rt->nb_prev_pkt[0])) <= 0) { |
| 2427 | if (ret == 0) { |
| 2428 | return AVERROR(EAGAIN); |
| 2429 | } else { |
| 2430 | return AVERROR(EIO); |
| 2431 | } |
| 2432 | } |
| 2433 | |
| 2434 | // Track timestamp for later use |
| 2435 | rt->last_timestamp = rpkt.timestamp; |
| 2436 | |
| 2437 | rt->bytes_read += ret; |
| 2438 | if (rt->bytes_read - rt->last_bytes_read > rt->client_report_size) { |
| 2439 | av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n"); |
| 2440 | if ((ret = gen_bytes_read(s, rt, rpkt.timestamp + 1)) < 0) |
| 2441 | return ret; |
| 2442 | rt->last_bytes_read = rt->bytes_read; |
| 2443 | } |
| 2444 | |
| 2445 | ret = rtmp_parse_result(s, rt, &rpkt); |
| 2446 | |
| 2447 | // At this point we must check if we are in the seek state and continue |
| 2448 | // with the next packet. handle_invoke will get us out of this state |
| 2449 | // when the right message is encountered |
| 2450 | if (rt->state == STATE_SEEKING) { |
| 2451 | ff_rtmp_packet_destroy(&rpkt); |
| 2452 | // We continue, let the natural flow of things happen: |
| 2453 | // AVERROR(EAGAIN) or handle_invoke gets us out of here |
| 2454 | continue; |
| 2455 | } |
| 2456 | |
| 2457 | if (ret < 0) {//serious error in current packet |
| 2458 | ff_rtmp_packet_destroy(&rpkt); |
| 2459 | return ret; |
| 2460 | } |
| 2461 | if (rt->do_reconnect && for_header) { |
| 2462 | ff_rtmp_packet_destroy(&rpkt); |
| 2463 | return 0; |
| 2464 | } |
| 2465 | if (rt->state == STATE_STOPPED) { |
| 2466 | ff_rtmp_packet_destroy(&rpkt); |
| 2467 | return AVERROR_EOF; |
| 2468 | } |
| 2469 | if (for_header && (rt->state == STATE_PLAYING || |
| 2470 | rt->state == STATE_PUBLISHING || |
| 2471 | rt->state == STATE_SENDING || |
| 2472 | rt->state == STATE_RECEIVING)) { |
| 2473 | ff_rtmp_packet_destroy(&rpkt); |
| 2474 | return 0; |
| 2475 | } |
| 2476 | if (!rpkt.size || !rt->is_input) { |
| 2477 | ff_rtmp_packet_destroy(&rpkt); |
| 2478 | continue; |
| 2479 | } |
| 2480 | if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO) { |
| 2481 | ret = append_flv_data(rt, &rpkt, 0); |
| 2482 | ff_rtmp_packet_destroy(&rpkt); |
| 2483 | return ret; |
| 2484 | } else if (rpkt.type == RTMP_PT_NOTIFY) { |
| 2485 | ret = handle_notify(s, &rpkt); |
| 2486 | ff_rtmp_packet_destroy(&rpkt); |
| 2487 | return ret; |
| 2488 | } else if (rpkt.type == RTMP_PT_METADATA) { |
| 2489 | ret = handle_metadata(rt, &rpkt); |
| 2490 | ff_rtmp_packet_destroy(&rpkt); |
| 2491 | return 0; |
| 2492 | } |
| 2493 | ff_rtmp_packet_destroy(&rpkt); |
| 2494 | } |
| 2495 | } |
| 2496 | |
| 2497 | static int rtmp_close(URLContext *h) |
| 2498 | { |
| 2499 | RTMPContext *rt = h->priv_data; |
| 2500 | int ret = 0, i, j; |
| 2501 | |
| 2502 | if (!rt->is_input) { |
| 2503 | rt->flv_data = NULL; |
| 2504 | if (rt->out_pkt.size) |
| 2505 | ff_rtmp_packet_destroy(&rt->out_pkt); |
| 2506 | if (rt->state > STATE_FCPUBLISH) |
| 2507 | ret = gen_fcunpublish_stream(h, rt); |
| 2508 | } |
| 2509 | if (rt->state > STATE_HANDSHAKED) |
| 2510 | ret = gen_delete_stream(h, rt); |
| 2511 | for (i = 0; i < 2; i++) { |
| 2512 | for (j = 0; j < rt->nb_prev_pkt[i]; j++) |
| 2513 | ff_rtmp_packet_destroy(&rt->prev_pkt[i][j]); |
| 2514 | av_freep(&rt->prev_pkt[i]); |
| 2515 | } |
| 2516 | |
| 2517 | free_tracked_methods(rt); |
| 2518 | av_freep(&rt->flv_data); |
| 2519 | ffurl_close(rt->stream); |
| 2520 | return ret; |
| 2521 | } |
| 2522 | |
| 2523 | /** |
| 2524 | * Insert a fake onMetadata packet into the FLV stream to notify the FLV |
| 2525 | * demuxer about the duration of the stream. |
| 2526 | * |
| 2527 | * This should only be done if there was no real onMetadata packet sent by the |
| 2528 | * server at the start of the stream and if we were able to retrieve a valid |
| 2529 | * duration via a getStreamLength call. |
| 2530 | * |
| 2531 | * @return 0 for successful operation, negative value in case of error |
| 2532 | */ |
| 2533 | static int inject_fake_duration_metadata(RTMPContext *rt) |
| 2534 | { |
| 2535 | // We need to insert the metdata packet directly after the FLV |
| 2536 | // header, i.e. we need to move all other already read data by the |
| 2537 | // size of our fake metadata packet. |
| 2538 | |
| 2539 | uint8_t* p; |
| 2540 | // Keep old flv_data pointer |
| 2541 | uint8_t* old_flv_data = rt->flv_data; |
| 2542 | // Allocate a new flv_data pointer with enough space for the additional package |
| 2543 | if (!(rt->flv_data = av_malloc(rt->flv_size + 55))) { |
| 2544 | rt->flv_data = old_flv_data; |
| 2545 | return AVERROR(ENOMEM); |
| 2546 | } |
| 2547 | |
| 2548 | // Copy FLV header |
| 2549 | memcpy(rt->flv_data, old_flv_data, 13); |
| 2550 | // Copy remaining packets |
| 2551 | memcpy(rt->flv_data + 13 + 55, old_flv_data + 13, rt->flv_size - 13); |
| 2552 | // Increase the size by the injected packet |
| 2553 | rt->flv_size += 55; |
| 2554 | // Delete the old FLV data |
| 2555 | av_free(old_flv_data); |
| 2556 | |
| 2557 | p = rt->flv_data + 13; |
| 2558 | bytestream_put_byte(&p, FLV_TAG_TYPE_META); |
| 2559 | bytestream_put_be24(&p, 40); // size of data part (sum of all parts below) |
| 2560 | bytestream_put_be24(&p, 0); // timestamp |
| 2561 | bytestream_put_be32(&p, 0); // reserved |
| 2562 | |
| 2563 | // first event name as a string |
| 2564 | bytestream_put_byte(&p, AMF_DATA_TYPE_STRING); |
| 2565 | // "onMetaData" as AMF string |
| 2566 | bytestream_put_be16(&p, 10); |
| 2567 | bytestream_put_buffer(&p, "onMetaData", 10); |
| 2568 | |
| 2569 | // mixed array (hash) with size and string/type/data tuples |
| 2570 | bytestream_put_byte(&p, AMF_DATA_TYPE_MIXEDARRAY); |
| 2571 | bytestream_put_be32(&p, 1); // metadata_count |
| 2572 | |
| 2573 | // "duration" as AMF string |
| 2574 | bytestream_put_be16(&p, 8); |
| 2575 | bytestream_put_buffer(&p, "duration", 8); |
| 2576 | bytestream_put_byte(&p, AMF_DATA_TYPE_NUMBER); |
| 2577 | bytestream_put_be64(&p, av_double2int(rt->duration)); |
| 2578 | |
| 2579 | // Finalise object |
| 2580 | bytestream_put_be16(&p, 0); // Empty string |
| 2581 | bytestream_put_byte(&p, AMF_END_OF_OBJECT); |
| 2582 | bytestream_put_be32(&p, 40); // size of data part (sum of all parts below) |
| 2583 | |
| 2584 | return 0; |
| 2585 | } |
| 2586 | |
| 2587 | /** |
| 2588 | * Open RTMP connection and verify that the stream can be played. |
| 2589 | * |
| 2590 | * URL syntax: rtmp://server[:port][/app][/playpath] |
| 2591 | * where 'app' is first one or two directories in the path |
| 2592 | * (e.g. /ondemand/, /flash/live/, etc.) |
| 2593 | * and 'playpath' is a file name (the rest of the path, |
| 2594 | * may be prefixed with "mp4:") |
| 2595 | */ |
| 2596 | static int rtmp_open(URLContext *s, const char *uri, int flags) |
| 2597 | { |
| 2598 | RTMPContext *rt = s->priv_data; |
| 2599 | char proto[8], hostname[256], path[1024], auth[100], *fname; |
| 2600 | char *old_app, *qmark, *n, fname_buffer[1024]; |
| 2601 | uint8_t buf[2048]; |
| 2602 | int port; |
| 2603 | AVDictionary *opts = NULL; |
| 2604 | int ret; |
| 2605 | |
| 2606 | if (rt->listen_timeout > 0) |
| 2607 | rt->listen = 1; |
| 2608 | |
| 2609 | rt->is_input = !(flags & AVIO_FLAG_WRITE); |
| 2610 | |
| 2611 | av_url_split(proto, sizeof(proto), auth, sizeof(auth), |
| 2612 | hostname, sizeof(hostname), &port, |
| 2613 | path, sizeof(path), s->filename); |
| 2614 | |
| 2615 | n = strchr(path, ' '); |
| 2616 | if (n) { |
| 2617 | av_log(s, AV_LOG_WARNING, |
| 2618 | "Detected librtmp style URL parameters, these aren't supported " |
| 2619 | "by the libavformat internal RTMP handler currently enabled. " |
| 2620 | "See the documentation for the correct way to pass parameters.\n"); |
| 2621 | *n = '\0'; // Trim not supported part |
| 2622 | } |
| 2623 | |
| 2624 | if (auth[0]) { |
| 2625 | char *ptr = strchr(auth, ':'); |
| 2626 | if (ptr) { |
| 2627 | *ptr = '\0'; |
| 2628 | av_strlcpy(rt->username, auth, sizeof(rt->username)); |
| 2629 | av_strlcpy(rt->password, ptr + 1, sizeof(rt->password)); |
| 2630 | } |
| 2631 | } |
| 2632 | |
| 2633 | if (rt->listen && strcmp(proto, "rtmp")) { |
| 2634 | av_log(s, AV_LOG_ERROR, "rtmp_listen not available for %s\n", |
| 2635 | proto); |
| 2636 | return AVERROR(EINVAL); |
| 2637 | } |
| 2638 | if (!strcmp(proto, "rtmpt") || !strcmp(proto, "rtmpts")) { |
| 2639 | if (!strcmp(proto, "rtmpts")) |
| 2640 | av_dict_set(&opts, "ffrtmphttp_tls", "1", 1); |
| 2641 | |
| 2642 | /* open the http tunneling connection */ |
| 2643 | ff_url_join(buf, sizeof(buf), "ffrtmphttp", NULL, hostname, port, NULL); |
| 2644 | } else if (!strcmp(proto, "rtmps")) { |
| 2645 | /* open the tls connection */ |
| 2646 | if (port < 0) |
| 2647 | port = RTMPS_DEFAULT_PORT; |
| 2648 | ff_url_join(buf, sizeof(buf), "tls", NULL, hostname, port, NULL); |
| 2649 | } else if (!strcmp(proto, "rtmpe") || (!strcmp(proto, "rtmpte"))) { |
| 2650 | if (!strcmp(proto, "rtmpte")) |
| 2651 | av_dict_set(&opts, "ffrtmpcrypt_tunneling", "1", 1); |
| 2652 | |
| 2653 | /* open the encrypted connection */ |
| 2654 | ff_url_join(buf, sizeof(buf), "ffrtmpcrypt", NULL, hostname, port, NULL); |
| 2655 | rt->encrypted = 1; |
| 2656 | } else { |
| 2657 | /* open the tcp connection */ |
| 2658 | if (port < 0) |
| 2659 | port = RTMP_DEFAULT_PORT; |
| 2660 | if (rt->listen) |
| 2661 | ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, |
| 2662 | "?listen&listen_timeout=%d", |
| 2663 | rt->listen_timeout * 1000); |
| 2664 | else |
| 2665 | ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); |
| 2666 | } |
| 2667 | |
| 2668 | reconnect: |
| 2669 | if ((ret = ffurl_open(&rt->stream, buf, AVIO_FLAG_READ_WRITE, |
| 2670 | &s->interrupt_callback, &opts)) < 0) { |
| 2671 | av_log(s , AV_LOG_ERROR, "Cannot open connection %s\n", buf); |
| 2672 | goto fail; |
| 2673 | } |
| 2674 | |
| 2675 | if (rt->swfverify) { |
| 2676 | if ((ret = rtmp_calc_swfhash(s)) < 0) |
| 2677 | goto fail; |
| 2678 | } |
| 2679 | |
| 2680 | rt->state = STATE_START; |
| 2681 | if (!rt->listen && (ret = rtmp_handshake(s, rt)) < 0) |
| 2682 | goto fail; |
| 2683 | if (rt->listen && (ret = rtmp_server_handshake(s, rt)) < 0) |
| 2684 | goto fail; |
| 2685 | |
| 2686 | rt->out_chunk_size = 128; |
| 2687 | rt->in_chunk_size = 128; // Probably overwritten later |
| 2688 | rt->state = STATE_HANDSHAKED; |
| 2689 | |
| 2690 | // Keep the application name when it has been defined by the user. |
| 2691 | old_app = rt->app; |
| 2692 | |
| 2693 | rt->app = av_malloc(APP_MAX_LENGTH); |
| 2694 | if (!rt->app) { |
| 2695 | ret = AVERROR(ENOMEM); |
| 2696 | goto fail; |
| 2697 | } |
| 2698 | |
| 2699 | //extract "app" part from path |
| 2700 | qmark = strchr(path, '?'); |
| 2701 | if (qmark && strstr(qmark, "slist=")) { |
| 2702 | char* amp; |
| 2703 | // After slist we have the playpath, before the params, the app |
| 2704 | av_strlcpy(rt->app, path + 1, FFMIN(qmark - path, APP_MAX_LENGTH)); |
| 2705 | fname = strstr(path, "slist=") + 6; |
| 2706 | // Strip any further query parameters from fname |
| 2707 | amp = strchr(fname, '&'); |
| 2708 | if (amp) { |
| 2709 | av_strlcpy(fname_buffer, fname, FFMIN(amp - fname + 1, |
| 2710 | sizeof(fname_buffer))); |
| 2711 | fname = fname_buffer; |
| 2712 | } |
| 2713 | } else if (!strncmp(path, "/ondemand/", 10)) { |
| 2714 | fname = path + 10; |
| 2715 | memcpy(rt->app, "ondemand", 9); |
| 2716 | } else { |
| 2717 | char *next = *path ? path + 1 : path; |
| 2718 | char *p = strchr(next, '/'); |
| 2719 | if (!p) { |
| 2720 | if (old_app) { |
| 2721 | // If name of application has been defined by the user, assume that |
| 2722 | // playpath is provided in the URL |
| 2723 | fname = next; |
| 2724 | } else { |
| 2725 | fname = NULL; |
| 2726 | av_strlcpy(rt->app, next, APP_MAX_LENGTH); |
| 2727 | } |
| 2728 | } else { |
| 2729 | // make sure we do not mismatch a playpath for an application instance |
| 2730 | char *c = strchr(p + 1, ':'); |
| 2731 | fname = strchr(p + 1, '/'); |
| 2732 | if (!fname || (c && c < fname)) { |
| 2733 | fname = p + 1; |
| 2734 | av_strlcpy(rt->app, path + 1, FFMIN(p - path, APP_MAX_LENGTH)); |
| 2735 | } else { |
| 2736 | fname++; |
| 2737 | av_strlcpy(rt->app, path + 1, FFMIN(fname - path - 1, APP_MAX_LENGTH)); |
| 2738 | } |
| 2739 | } |
| 2740 | } |
| 2741 | |
| 2742 | if (old_app) { |
| 2743 | // The name of application has been defined by the user, override it. |
| 2744 | if (strlen(old_app) >= APP_MAX_LENGTH) { |
| 2745 | ret = AVERROR(EINVAL); |
| 2746 | goto fail; |
| 2747 | } |
| 2748 | av_free(rt->app); |
| 2749 | rt->app = old_app; |
| 2750 | } |
| 2751 | |
| 2752 | if (!rt->playpath) { |
| 2753 | rt->playpath = av_malloc(PLAYPATH_MAX_LENGTH); |
| 2754 | if (!rt->playpath) { |
| 2755 | ret = AVERROR(ENOMEM); |
| 2756 | goto fail; |
| 2757 | } |
| 2758 | |
| 2759 | if (fname) { |
| 2760 | int len = strlen(fname); |
| 2761 | if (!strchr(fname, ':') && len >= 4 && |
| 2762 | (!strcmp(fname + len - 4, ".f4v") || |
| 2763 | !strcmp(fname + len - 4, ".mp4"))) { |
| 2764 | memcpy(rt->playpath, "mp4:", 5); |
| 2765 | } else { |
| 2766 | if (len >= 4 && !strcmp(fname + len - 4, ".flv")) |
| 2767 | fname[len - 4] = '\0'; |
| 2768 | rt->playpath[0] = 0; |
| 2769 | } |
| 2770 | av_strlcat(rt->playpath, fname, PLAYPATH_MAX_LENGTH); |
| 2771 | } else { |
| 2772 | rt->playpath[0] = '\0'; |
| 2773 | } |
| 2774 | } |
| 2775 | |
| 2776 | if (!rt->tcurl) { |
| 2777 | rt->tcurl = av_malloc(TCURL_MAX_LENGTH); |
| 2778 | if (!rt->tcurl) { |
| 2779 | ret = AVERROR(ENOMEM); |
| 2780 | goto fail; |
| 2781 | } |
| 2782 | ff_url_join(rt->tcurl, TCURL_MAX_LENGTH, proto, NULL, hostname, |
| 2783 | port, "/%s", rt->app); |
| 2784 | } |
| 2785 | |
| 2786 | if (!rt->flashver) { |
| 2787 | rt->flashver = av_malloc(FLASHVER_MAX_LENGTH); |
| 2788 | if (!rt->flashver) { |
| 2789 | ret = AVERROR(ENOMEM); |
| 2790 | goto fail; |
| 2791 | } |
| 2792 | if (rt->is_input) { |
| 2793 | snprintf(rt->flashver, FLASHVER_MAX_LENGTH, "%s %d,%d,%d,%d", |
| 2794 | RTMP_CLIENT_PLATFORM, RTMP_CLIENT_VER1, RTMP_CLIENT_VER2, |
| 2795 | RTMP_CLIENT_VER3, RTMP_CLIENT_VER4); |
| 2796 | } else { |
| 2797 | snprintf(rt->flashver, FLASHVER_MAX_LENGTH, |
| 2798 | "FMLE/3.0 (compatible; %s)", LIBAVFORMAT_IDENT); |
| 2799 | } |
| 2800 | } |
| 2801 | |
| 2802 | rt->client_report_size = 1048576; |
| 2803 | rt->bytes_read = 0; |
| 2804 | rt->has_audio = 0; |
| 2805 | rt->has_video = 0; |
| 2806 | rt->received_metadata = 0; |
| 2807 | rt->last_bytes_read = 0; |
| 2808 | rt->server_bw = 2500000; |
| 2809 | rt->duration = 0; |
| 2810 | |
| 2811 | av_log(s, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n", |
| 2812 | proto, path, rt->app, rt->playpath); |
| 2813 | if (!rt->listen) { |
| 2814 | if ((ret = gen_connect(s, rt)) < 0) |
| 2815 | goto fail; |
| 2816 | } else { |
| 2817 | if ((ret = read_connect(s, s->priv_data)) < 0) |
| 2818 | goto fail; |
| 2819 | } |
| 2820 | |
| 2821 | do { |
| 2822 | ret = get_packet(s, 1); |
| 2823 | } while (ret == AVERROR(EAGAIN)); |
| 2824 | if (ret < 0) |
| 2825 | goto fail; |
| 2826 | |
| 2827 | if (rt->do_reconnect) { |
| 2828 | int i; |
| 2829 | ffurl_close(rt->stream); |
| 2830 | rt->stream = NULL; |
| 2831 | rt->do_reconnect = 0; |
| 2832 | rt->nb_invokes = 0; |
| 2833 | for (i = 0; i < 2; i++) |
| 2834 | memset(rt->prev_pkt[i], 0, |
| 2835 | sizeof(**rt->prev_pkt) * rt->nb_prev_pkt[i]); |
| 2836 | free_tracked_methods(rt); |
| 2837 | goto reconnect; |
| 2838 | } |
| 2839 | |
| 2840 | if (rt->is_input) { |
| 2841 | // generate FLV header for demuxer |
| 2842 | rt->flv_size = 13; |
| 2843 | if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) |
| 2844 | goto fail; |
| 2845 | rt->flv_off = 0; |
| 2846 | memcpy(rt->flv_data, "FLV\1\0\0\0\0\011\0\0\0\0", rt->flv_size); |
| 2847 | |
| 2848 | // Read packets until we reach the first A/V packet or read metadata. |
| 2849 | // If there was a metadata package in front of the A/V packets, we can |
| 2850 | // build the FLV header from this. If we do not receive any metadata, |
| 2851 | // the FLV decoder will allocate the needed streams when their first |
| 2852 | // audio or video packet arrives. |
| 2853 | while (!rt->has_audio && !rt->has_video && !rt->received_metadata) { |
| 2854 | if ((ret = get_packet(s, 0)) < 0) |
| 2855 | goto fail; |
| 2856 | } |
| 2857 | |
| 2858 | // Either after we have read the metadata or (if there is none) the |
| 2859 | // first packet of an A/V stream, we have a better knowledge about the |
| 2860 | // streams, so set the FLV header accordingly. |
| 2861 | if (rt->has_audio) { |
| 2862 | rt->flv_data[4] |= FLV_HEADER_FLAG_HASAUDIO; |
| 2863 | } |
| 2864 | if (rt->has_video) { |
| 2865 | rt->flv_data[4] |= FLV_HEADER_FLAG_HASVIDEO; |
| 2866 | } |
| 2867 | |
| 2868 | // If we received the first packet of an A/V stream and no metadata but |
| 2869 | // the server returned a valid duration, create a fake metadata packet |
| 2870 | // to inform the FLV decoder about the duration. |
| 2871 | if (!rt->received_metadata && rt->duration > 0) { |
| 2872 | if ((ret = inject_fake_duration_metadata(rt)) < 0) |
| 2873 | goto fail; |
| 2874 | } |
| 2875 | } else { |
| 2876 | rt->flv_size = 0; |
| 2877 | rt->flv_data = NULL; |
| 2878 | rt->flv_off = 0; |
| 2879 | rt->skip_bytes = 13; |
| 2880 | } |
| 2881 | |
| 2882 | s->max_packet_size = rt->stream->max_packet_size; |
| 2883 | s->is_streamed = 1; |
| 2884 | return 0; |
| 2885 | |
| 2886 | fail: |
| 2887 | av_dict_free(&opts); |
| 2888 | rtmp_close(s); |
| 2889 | return ret; |
| 2890 | } |
| 2891 | |
| 2892 | static int rtmp_read(URLContext *s, uint8_t *buf, int size) |
| 2893 | { |
| 2894 | RTMPContext *rt = s->priv_data; |
| 2895 | int orig_size = size; |
| 2896 | int ret; |
| 2897 | |
| 2898 | while (size > 0) { |
| 2899 | int data_left = rt->flv_size - rt->flv_off; |
| 2900 | |
| 2901 | if (data_left >= size) { |
| 2902 | memcpy(buf, rt->flv_data + rt->flv_off, size); |
| 2903 | rt->flv_off += size; |
| 2904 | return orig_size; |
| 2905 | } |
| 2906 | if (data_left > 0) { |
| 2907 | memcpy(buf, rt->flv_data + rt->flv_off, data_left); |
| 2908 | buf += data_left; |
| 2909 | size -= data_left; |
| 2910 | rt->flv_off = rt->flv_size; |
| 2911 | return data_left; |
| 2912 | } |
| 2913 | if ((ret = get_packet(s, 0)) < 0) |
| 2914 | return ret; |
| 2915 | } |
| 2916 | return orig_size; |
| 2917 | } |
| 2918 | |
| 2919 | static int64_t rtmp_seek(URLContext *s, int stream_index, int64_t timestamp, |
| 2920 | int flags) |
| 2921 | { |
| 2922 | RTMPContext *rt = s->priv_data; |
| 2923 | int ret; |
| 2924 | av_log(s, AV_LOG_DEBUG, |
| 2925 | "Seek on stream index %d at timestamp %"PRId64" with flags %08x\n", |
| 2926 | stream_index, timestamp, flags); |
| 2927 | if ((ret = gen_seek(s, rt, timestamp)) < 0) { |
| 2928 | av_log(s, AV_LOG_ERROR, |
| 2929 | "Unable to send seek command on stream index %d at timestamp " |
| 2930 | "%"PRId64" with flags %08x\n", |
| 2931 | stream_index, timestamp, flags); |
| 2932 | return ret; |
| 2933 | } |
| 2934 | rt->flv_off = rt->flv_size; |
| 2935 | rt->state = STATE_SEEKING; |
| 2936 | return timestamp; |
| 2937 | } |
| 2938 | |
| 2939 | static int rtmp_pause(URLContext *s, int pause) |
| 2940 | { |
| 2941 | RTMPContext *rt = s->priv_data; |
| 2942 | int ret; |
| 2943 | av_log(s, AV_LOG_DEBUG, "Pause at timestamp %d\n", |
| 2944 | rt->last_timestamp); |
| 2945 | if ((ret = gen_pause(s, rt, pause, rt->last_timestamp)) < 0) { |
| 2946 | av_log(s, AV_LOG_ERROR, "Unable to send pause command at timestamp %d\n", |
| 2947 | rt->last_timestamp); |
| 2948 | return ret; |
| 2949 | } |
| 2950 | return 0; |
| 2951 | } |
| 2952 | |
| 2953 | static int rtmp_write(URLContext *s, const uint8_t *buf, int size) |
| 2954 | { |
| 2955 | RTMPContext *rt = s->priv_data; |
| 2956 | int size_temp = size; |
| 2957 | int pktsize, pkttype, copy; |
| 2958 | uint32_t ts; |
| 2959 | const uint8_t *buf_temp = buf; |
| 2960 | uint8_t c; |
| 2961 | int ret; |
| 2962 | |
| 2963 | do { |
| 2964 | if (rt->skip_bytes) { |
| 2965 | int skip = FFMIN(rt->skip_bytes, size_temp); |
| 2966 | buf_temp += skip; |
| 2967 | size_temp -= skip; |
| 2968 | rt->skip_bytes -= skip; |
| 2969 | continue; |
| 2970 | } |
| 2971 | |
| 2972 | if (rt->flv_header_bytes < RTMP_HEADER) { |
| 2973 | const uint8_t *header = rt->flv_header; |
| 2974 | int channel = RTMP_AUDIO_CHANNEL; |
| 2975 | |
| 2976 | copy = FFMIN(RTMP_HEADER - rt->flv_header_bytes, size_temp); |
| 2977 | bytestream_get_buffer(&buf_temp, rt->flv_header + rt->flv_header_bytes, copy); |
| 2978 | rt->flv_header_bytes += copy; |
| 2979 | size_temp -= copy; |
| 2980 | if (rt->flv_header_bytes < RTMP_HEADER) |
| 2981 | break; |
| 2982 | |
| 2983 | pkttype = bytestream_get_byte(&header); |
| 2984 | pktsize = bytestream_get_be24(&header); |
| 2985 | ts = bytestream_get_be24(&header); |
| 2986 | ts |= bytestream_get_byte(&header) << 24; |
| 2987 | bytestream_get_be24(&header); |
| 2988 | rt->flv_size = pktsize; |
| 2989 | |
| 2990 | if (pkttype == RTMP_PT_VIDEO) |
| 2991 | channel = RTMP_VIDEO_CHANNEL; |
| 2992 | |
| 2993 | if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) || |
| 2994 | pkttype == RTMP_PT_NOTIFY) { |
| 2995 | if ((ret = ff_rtmp_check_alloc_array(&rt->prev_pkt[1], |
| 2996 | &rt->nb_prev_pkt[1], |
| 2997 | channel)) < 0) |
| 2998 | return ret; |
| 2999 | // Force sending a full 12 bytes header by clearing the |
| 3000 | // channel id, to make it not match a potential earlier |
| 3001 | // packet in the same channel. |
| 3002 | rt->prev_pkt[1][channel].channel_id = 0; |
| 3003 | } |
| 3004 | |
| 3005 | //this can be a big packet, it's better to send it right here |
| 3006 | if ((ret = ff_rtmp_packet_create(&rt->out_pkt, channel, |
| 3007 | pkttype, ts, pktsize)) < 0) |
| 3008 | return ret; |
| 3009 | |
| 3010 | rt->out_pkt.extra = rt->stream_id; |
| 3011 | rt->flv_data = rt->out_pkt.data; |
| 3012 | } |
| 3013 | |
| 3014 | copy = FFMIN(rt->flv_size - rt->flv_off, size_temp); |
| 3015 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, copy); |
| 3016 | rt->flv_off += copy; |
| 3017 | size_temp -= copy; |
| 3018 | |
| 3019 | if (rt->flv_off == rt->flv_size) { |
| 3020 | rt->skip_bytes = 4; |
| 3021 | |
| 3022 | if (rt->out_pkt.type == RTMP_PT_NOTIFY) { |
| 3023 | // For onMetaData and |RtmpSampleAccess packets, we want |
| 3024 | // @setDataFrame prepended to the packet before it gets sent. |
| 3025 | // However, not all RTMP_PT_NOTIFY packets (e.g., onTextData |
| 3026 | // and onCuePoint). |
| 3027 | uint8_t commandbuffer[64]; |
| 3028 | int stringlen = 0; |
| 3029 | GetByteContext gbc; |
| 3030 | |
| 3031 | bytestream2_init(&gbc, rt->flv_data, rt->flv_size); |
| 3032 | if (!ff_amf_read_string(&gbc, commandbuffer, sizeof(commandbuffer), |
| 3033 | &stringlen)) { |
| 3034 | if (!strcmp(commandbuffer, "onMetaData") || |
| 3035 | !strcmp(commandbuffer, "|RtmpSampleAccess")) { |
| 3036 | uint8_t *ptr; |
| 3037 | if ((ret = av_reallocp(&rt->out_pkt.data, rt->out_pkt.size + 16)) < 0) { |
| 3038 | rt->flv_size = rt->flv_off = rt->flv_header_bytes = 0; |
| 3039 | return ret; |
| 3040 | } |
| 3041 | memmove(rt->out_pkt.data + 16, rt->out_pkt.data, rt->out_pkt.size); |
| 3042 | rt->out_pkt.size += 16; |
| 3043 | ptr = rt->out_pkt.data; |
| 3044 | ff_amf_write_string(&ptr, "@setDataFrame"); |
| 3045 | } |
| 3046 | } |
| 3047 | } |
| 3048 | |
| 3049 | if ((ret = rtmp_send_packet(rt, &rt->out_pkt, 0)) < 0) |
| 3050 | return ret; |
| 3051 | rt->flv_size = 0; |
| 3052 | rt->flv_off = 0; |
| 3053 | rt->flv_header_bytes = 0; |
| 3054 | rt->flv_nb_packets++; |
| 3055 | } |
| 3056 | } while (buf_temp - buf < size); |
| 3057 | |
| 3058 | if (rt->flv_nb_packets < rt->flush_interval) |
| 3059 | return size; |
| 3060 | rt->flv_nb_packets = 0; |
| 3061 | |
| 3062 | /* set stream into nonblocking mode */ |
| 3063 | rt->stream->flags |= AVIO_FLAG_NONBLOCK; |
| 3064 | |
| 3065 | /* try to read one byte from the stream */ |
| 3066 | ret = ffurl_read(rt->stream, &c, 1); |
| 3067 | |
| 3068 | /* switch the stream back into blocking mode */ |
| 3069 | rt->stream->flags &= ~AVIO_FLAG_NONBLOCK; |
| 3070 | |
| 3071 | if (ret == AVERROR(EAGAIN)) { |
| 3072 | /* no incoming data to handle */ |
| 3073 | return size; |
| 3074 | } else if (ret < 0) { |
| 3075 | return ret; |
| 3076 | } else if (ret == 1) { |
| 3077 | RTMPPacket rpkt = { 0 }; |
| 3078 | |
| 3079 | if ((ret = ff_rtmp_packet_read_internal(rt->stream, &rpkt, |
| 3080 | rt->in_chunk_size, |
| 3081 | &rt->prev_pkt[0], |
| 3082 | &rt->nb_prev_pkt[0], c)) <= 0) |
| 3083 | return ret; |
| 3084 | |
| 3085 | if ((ret = rtmp_parse_result(s, rt, &rpkt)) < 0) |
| 3086 | return ret; |
| 3087 | |
| 3088 | ff_rtmp_packet_destroy(&rpkt); |
| 3089 | } |
| 3090 | |
| 3091 | return size; |
| 3092 | } |
| 3093 | |
| 3094 | #define OFFSET(x) offsetof(RTMPContext, x) |
| 3095 | #define DEC AV_OPT_FLAG_DECODING_PARAM |
| 3096 | #define ENC AV_OPT_FLAG_ENCODING_PARAM |
| 3097 | |
| 3098 | static const AVOption rtmp_options[] = { |
| 3099 | {"rtmp_app", "Name of application to connect to on the RTMP server", OFFSET(app), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC}, |
| 3100 | {"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}, |
| 3101 | {"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC}, |
| 3102 | {"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}, |
| 3103 | {"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}, |
| 3104 | {"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"}, |
| 3105 | {"any", "both", 0, AV_OPT_TYPE_CONST, {.i64 = -2}, 0, 0, DEC, "rtmp_live"}, |
| 3106 | {"live", "live stream", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, DEC, "rtmp_live"}, |
| 3107 | {"recorded", "recorded stream", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, DEC, "rtmp_live"}, |
| 3108 | {"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}, |
| 3109 | {"rtmp_playpath", "Stream identifier to play or to publish", OFFSET(playpath), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC}, |
| 3110 | {"rtmp_subscribe", "Name of live stream to subscribe to. Defaults to rtmp_playpath.", OFFSET(subscribe), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC}, |
| 3111 | {"rtmp_swfhash", "SHA256 hash of the decompressed SWF file (32 bytes).", OFFSET(swfhash), AV_OPT_TYPE_BINARY, .flags = DEC}, |
| 3112 | {"rtmp_swfsize", "Size of the decompressed SWF file, required for SWFVerification.", OFFSET(swfsize), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC}, |
| 3113 | {"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}, |
| 3114 | {"rtmp_swfverify", "URL to player swf file, compute hash/size automatically.", OFFSET(swfverify), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC}, |
| 3115 | {"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}, |
| 3116 | {"rtmp_listen", "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" }, |
| 3117 | {"listen", "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" }, |
| 3118 | {"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" }, |
| 3119 | { NULL }, |
| 3120 | }; |
| 3121 | |
| 3122 | #define RTMP_PROTOCOL(flavor) \ |
| 3123 | static const AVClass flavor##_class = { \ |
| 3124 | .class_name = #flavor, \ |
| 3125 | .item_name = av_default_item_name, \ |
| 3126 | .option = rtmp_options, \ |
| 3127 | .version = LIBAVUTIL_VERSION_INT, \ |
| 3128 | }; \ |
| 3129 | \ |
| 3130 | URLProtocol ff_##flavor##_protocol = { \ |
| 3131 | .name = #flavor, \ |
| 3132 | .url_open = rtmp_open, \ |
| 3133 | .url_read = rtmp_read, \ |
| 3134 | .url_read_seek = rtmp_seek, \ |
| 3135 | .url_read_pause = rtmp_pause, \ |
| 3136 | .url_write = rtmp_write, \ |
| 3137 | .url_close = rtmp_close, \ |
| 3138 | .priv_data_size = sizeof(RTMPContext), \ |
| 3139 | .flags = URL_PROTOCOL_FLAG_NETWORK, \ |
| 3140 | .priv_data_class= &flavor##_class, \ |
| 3141 | }; |
| 3142 | |
| 3143 | |
| 3144 | RTMP_PROTOCOL(rtmp) |
| 3145 | RTMP_PROTOCOL(rtmpe) |
| 3146 | RTMP_PROTOCOL(rtmps) |
| 3147 | RTMP_PROTOCOL(rtmpt) |
| 3148 | RTMP_PROTOCOL(rtmpte) |
| 3149 | RTMP_PROTOCOL(rtmpts) |