1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* rtp.h
*
* rtp interface for srtp reference implementation
*
* David A. McGrew
* Cisco Systems, Inc.
*
* data types:
*
* rtp_msg_t an rtp message (the data that goes on the wire)
* rtp_sender_t sender side socket and rtp info
* rtp_receiver_t receiver side socket and rtp info
*
*/
/*
*
* Copyright (c) 2001-2017, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef SRTP_RTP_H
#define SRTP_RTP_H
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#elif defined HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#include "srtp_priv.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* RTP_HEADER_LEN indicates the size of an RTP header
*/
#define RTP_HEADER_LEN 12
/*
* RTP_MAX_BUF_LEN defines the largest RTP packet in the rtp.c implementation
*/
#define RTP_MAX_BUF_LEN 16384
typedef srtp_hdr_t rtp_hdr_t;
typedef struct {
srtp_hdr_t header;
char body[RTP_MAX_BUF_LEN];
} rtp_msg_t;
typedef struct rtp_sender_ctx_t {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* reciever's address */
} rtp_sender_ctx_t;
typedef struct rtp_receiver_ctx_t {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* receiver's address */
} rtp_receiver_ctx_t;
typedef struct rtp_sender_ctx_t *rtp_sender_t;
typedef struct rtp_receiver_ctx_t *rtp_receiver_t;
int rtp_sendto(rtp_sender_t sender, const void *msg, int len);
int rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len);
int rtp_receiver_init(rtp_receiver_t rcvr,
int sock,
struct sockaddr_in addr,
unsigned int ssrc);
int rtp_sender_init(rtp_sender_t sender,
int sock,
struct sockaddr_in addr,
unsigned int ssrc);
/*
* srtp_sender_init(...) initializes an rtp_sender_t
*/
int srtp_sender_init(
rtp_sender_t rtp_ctx, /* structure to be init'ed */
struct sockaddr_in name, /* socket name */
srtp_sec_serv_t security_services, /* sec. servs. to be used */
unsigned char *input_key /* master key/salt in hex */
);
int srtp_receiver_init(
rtp_receiver_t rtp_ctx, /* structure to be init'ed */
struct sockaddr_in name, /* socket name */
srtp_sec_serv_t security_services, /* sec. servs. to be used */
unsigned char *input_key /* master key/salt in hex */
);
int rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy);
int rtp_sender_deinit_srtp(rtp_sender_t sender);
int rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy);
int rtp_receiver_deinit_srtp(rtp_receiver_t sender);
rtp_sender_t rtp_sender_alloc(void);
void rtp_sender_dealloc(rtp_sender_t rtp_ctx);
rtp_receiver_t rtp_receiver_alloc(void);
void rtp_receiver_dealloc(rtp_receiver_t rtp_ctx);
#ifdef __cplusplus
}
#endif
#endif /* SRTP_RTP_H */
|
