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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2006 - 2007, Mikael Magnusson
*
* Mikael Magnusson <mikma@users.sourceforge.net>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file sdp_crypto.h
*
* \brief SDP Security descriptions
*
* Specified in RFC 4568
*
* \author Mikael Magnusson <mikma@users.sourceforge.net>
*/
#ifndef _SDP_CRYPTO_H
#define _SDP_CRYPTO_H
#include <asterisk/rtp_engine.h>
struct sdp_crypto;
/*! \brief Initialize an return an sdp_crypto struct
*
* \details
* This function allocates a new sdp_crypto struct and initializes its values
*
* \retval NULL on failure
* \retval a pointer to a new sdp_crypto structure
*/
struct sdp_crypto *sdp_crypto_setup(void);
/*! \brief Destroy a previously allocated sdp_crypto struct */
void sdp_crypto_destroy(struct sdp_crypto *crypto);
/*! \brief Parse the a=crypto line from SDP and set appropriate values on the
* sdp_crypto struct.
*
* \param p A valid sdp_crypto struct
* \param attr the a:crypto line from SDP
* \param rtp The rtp instance associated with the SDP being parsed
*
* \retval 0 success
* \retval nonzero failure
*/
int sdp_crypto_process(struct sdp_crypto *p, const char *attr, struct ast_rtp_instance *rtp);
/*! \brief Generate an SRTP a=crypto offer
*
* \details
* The offer is stored on the sdp_crypto struct in a_crypto
*
* \param A valid sdp_crypto struct
*
* \retval 0 success
* \retval nonzero failure
*/
int sdp_crypto_offer(struct sdp_crypto *p);
/*! \brief Return the a_crypto value of the sdp_crypto struct
*
* \param p An sdp_crypto struct that has had sdp_crypto_offer called
*
* \retval The value of the a_crypto for p
*/
const char *sdp_crypto_attrib(struct sdp_crypto *p);
#endif /* _SDP_CRYPTO_H */
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