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112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* rtp_message.h
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*
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* Rtp Message handler. It handles message/header parsing.
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* Refer to RTP: A Transport Protocol for Real-Time Applications ( RFC 3550 ) for more info. !Red!
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*
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*
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* Copyright (C) 2013 Tox project All Rights Reserved.
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*
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* This file is part of Tox.
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*
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* Tox is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tox is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Tox. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef _RTP__MESSAGE_H_
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#define _RTP__MESSAGE_H_
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#include "../toxcore/network.h"
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#include "toxrtp_helper.h"
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#include "../toxcore/tox.h"
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/* Defines */
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#define _MAX_SEQU_NUM 65535
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/* Minimum size */
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#define _MIN_HEADER_LENGTH 12
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#define _MIN_EXT_HEADER_LENGTH 4
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/* End of defines */
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typedef struct rtp_dest_list_s {
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tox_IP_Port _dest;
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struct rtp_dest_list_s* next;
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} rtp_dest_list_t;
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typedef struct rtp_header_s {
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uint8_t _flags; /* Version(2),Padding(1), Ext(1), Cc(4) */
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uint8_t _marker_payload_t; /* Marker(1), PlayLoad Type(7) */
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uint16_t _sequence_number; /* Sequence Number */
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uint32_t _timestamp; /* Timestamp */
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uint32_t _ssrc; /* SSRC */
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uint32_t* _csrc; /* CSRC's table */
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uint32_t _length; /* A little something for allocation */
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} rtp_header_t;
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typedef struct rtp_ext_header_s {
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uint16_t _ext_type; /* Extension profile */
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uint16_t _ext_len; /* Number of extensions */
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uint32_t* _hd_ext; /* Extension's table */
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} rtp_ext_header_t;
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typedef struct rtp_msg_s {
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struct rtp_header_s* _header;
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struct rtp_ext_header_s* _ext_header;
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uint32_t _header_lenght;
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uint8_t* _data;
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uint32_t _length;
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tox_IP_Port _from;
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struct rtp_msg_s* _next;
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} rtp_msg_t;
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/* Extracts the header from the payload starting at _from */
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rtp_header_t* rtp_extract_header ( const uint8_t* _payload, size_t _bytes );
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rtp_ext_header_t* rtp_extract_ext_header ( const uint8_t* _payload, size_t _bytes );
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uint8_t* rtp_add_header ( rtp_header_t* _header, uint8_t* _payload );
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uint8_t* rtp_add_extention_header ( rtp_ext_header_t* _header, uint8_t* _payload );
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/* Gets the size of the header _header in bytes */
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size_t rtp_header_get_size ( const rtp_header_t* _header );
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void rtp_header_print (const rtp_header_t* _header);
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/* Adding flags and settings */
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void rtp_header_add_flag_version ( rtp_header_t* _header, uint32_t value );
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void rtp_header_add_flag_padding ( rtp_header_t* _header, uint32_t value );
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void rtp_header_add_flag_extension ( rtp_header_t* _header, uint32_t value );
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void rtp_header_add_flag_CSRC_count ( rtp_header_t* _header, uint32_t value );
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void rtp_header_add_setting_marker ( rtp_header_t* _header, uint32_t value );
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void rtp_header_add_setting_payload ( rtp_header_t* _header, uint32_t value );
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/* Getting values from flags and settings */
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uint8_t rtp_header_get_flag_version ( const rtp_header_t* _header );
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uint8_t rtp_header_get_flag_padding ( const rtp_header_t* _header );
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uint8_t rtp_header_get_flag_extension ( const rtp_header_t* _header );
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uint8_t rtp_header_get_flag_CSRC_count ( const rtp_header_t* _header );
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uint8_t rtp_header_get_setting_marker ( const rtp_header_t* _header );
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uint8_t rtp_header_get_setting_payload_type ( const rtp_header_t* _header );
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#endif /* _RTP__MESSAGE_H_ */
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