/*
* 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
#include "srtp_priv.h"
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#elif defined HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#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 */
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