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  1. /*
  2.  * RTMP definitions
  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. #ifndef AVFORMAT_RTMP_H
  23. #define AVFORMAT_RTMP_H
  24.  
  25. #include "avformat.h"
  26.  
  27. #define RTMP_DEFAULT_PORT 1935
  28. #define RTMPS_DEFAULT_PORT 443
  29.  
  30. #define RTMP_HANDSHAKE_PACKET_SIZE 1536
  31.  
  32. #define HMAC_IPAD_VAL 0x36
  33. #define HMAC_OPAD_VAL 0x5C
  34.  
  35. /**
  36.  * emulated Flash client version - 9.0.124.2 on Linux
  37.  * @{
  38.  */
  39. #define RTMP_CLIENT_PLATFORM "LNX"
  40. #define RTMP_CLIENT_VER1    9
  41. #define RTMP_CLIENT_VER2    0
  42. #define RTMP_CLIENT_VER3  124
  43. #define RTMP_CLIENT_VER4    2
  44. /** @} */ //version defines
  45.  
  46. /**
  47.  * Calculate HMAC-SHA2 digest for RTMP handshake packets.
  48.  *
  49.  * @param src    input buffer
  50.  * @param len    input buffer length (should be 1536)
  51.  * @param gap    offset in buffer where 32 bytes should not be taken into account
  52.  *               when calculating digest (since it will be used to store that digest)
  53.  * @param key    digest key
  54.  * @param keylen digest key length
  55.  * @param dst    buffer where calculated digest will be stored (32 bytes)
  56.  */
  57. int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
  58.                         const uint8_t *key, int keylen, uint8_t *dst);
  59.  
  60. /**
  61.  * Calculate digest position for RTMP handshake packets.
  62.  *
  63.  * @param buf input buffer (should be 1536 bytes)
  64.  * @param off offset in buffer where to start calculating digest position
  65.  * @param mod_val value used for computing modulo
  66.  * @param add_val value added at the end (after computing modulo)
  67.  */
  68. int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val,
  69.                             int add_val);
  70.  
  71. #endif /* AVFORMAT_RTMP_H */
  72.