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rtmp.h
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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 */