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156 lines
4.4 KiB
156 lines
4.4 KiB
/*
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* rtp.h
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*
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* rtp interface for srtp reference implementation
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*
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* David A. McGrew
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* Cisco Systems, Inc.
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*
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* data types:
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*
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* rtp_msg_t an rtp message (the data that goes on the wire)
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* rtp_sender_t sender side socket and rtp info
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* rtp_receiver_t receiver side socket and rtp info
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*
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*/
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/*
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*
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* Copyright (c) 2001-2017, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef SRTP_RTP_H
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#define SRTP_RTP_H
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#elif defined HAVE_WINSOCK2_H
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#include <winsock2.h>
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#endif
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#include "srtp_priv.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* RTP_HEADER_LEN indicates the size of an RTP header
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*/
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#define RTP_HEADER_LEN 12
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/*
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* RTP_MAX_BUF_LEN defines the largest RTP packet in the rtp.c implementation
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*/
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#define RTP_MAX_BUF_LEN 16384
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typedef srtp_hdr_t rtp_hdr_t;
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typedef struct {
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srtp_hdr_t header;
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char body[RTP_MAX_BUF_LEN];
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} rtp_msg_t;
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typedef struct rtp_sender_ctx_t {
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rtp_msg_t message;
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int socket;
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srtp_ctx_t *srtp_ctx;
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struct sockaddr_in addr; /* reciever's address */
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} rtp_sender_ctx_t;
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typedef struct rtp_receiver_ctx_t {
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rtp_msg_t message;
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int socket;
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srtp_ctx_t *srtp_ctx;
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struct sockaddr_in addr; /* receiver's address */
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} rtp_receiver_ctx_t;
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typedef struct rtp_sender_ctx_t *rtp_sender_t;
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typedef struct rtp_receiver_ctx_t *rtp_receiver_t;
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int rtp_sendto(rtp_sender_t sender, const void *msg, int len);
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int rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len);
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int rtp_receiver_init(rtp_receiver_t rcvr,
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int sock,
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struct sockaddr_in addr,
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unsigned int ssrc);
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int rtp_sender_init(rtp_sender_t sender,
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int sock,
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struct sockaddr_in addr,
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unsigned int ssrc);
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/*
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* srtp_sender_init(...) initializes an rtp_sender_t
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*/
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int srtp_sender_init(
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rtp_sender_t rtp_ctx, /* structure to be init'ed */
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struct sockaddr_in name, /* socket name */
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srtp_sec_serv_t security_services, /* sec. servs. to be used */
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unsigned char *input_key /* master key/salt in hex */
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);
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int srtp_receiver_init(
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rtp_receiver_t rtp_ctx, /* structure to be init'ed */
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struct sockaddr_in name, /* socket name */
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srtp_sec_serv_t security_services, /* sec. servs. to be used */
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unsigned char *input_key /* master key/salt in hex */
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);
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int rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy);
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int rtp_sender_deinit_srtp(rtp_sender_t sender);
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int rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy);
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int rtp_receiver_deinit_srtp(rtp_receiver_t sender);
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rtp_sender_t rtp_sender_alloc(void);
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void rtp_sender_dealloc(rtp_sender_t rtp_ctx);
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rtp_receiver_t rtp_receiver_alloc(void);
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void rtp_receiver_dealloc(rtp_receiver_t rtp_ctx);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SRTP_RTP_H */
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