You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
3.5 KiB
122 lines
3.5 KiB
/*
|
|
* rtp_decoder.h
|
|
*
|
|
* decoder structures and functions for SRTP pcap decoder
|
|
*
|
|
* Bernardo Torres <bernardo@torresautomacao.com.br>
|
|
*
|
|
* Some structure and code from https://github.com/gteissier/srtp-decrypt
|
|
*
|
|
*/
|
|
/*
|
|
*
|
|
* 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 RTP_DECODER_H
|
|
#define RTP_DECODER_H
|
|
|
|
#include "srtp_priv.h"
|
|
#include "rtp.h"
|
|
|
|
#define DEFAULT_RTP_OFFSET 42
|
|
|
|
typedef enum {
|
|
mode_rtp = 0,
|
|
mode_rtcp,
|
|
mode_rtcp_mux,
|
|
} rtp_decoder_mode_t;
|
|
|
|
typedef struct rtp_decoder_ctx_t {
|
|
srtp_policy_t policy;
|
|
srtp_ctx_t *srtp_ctx;
|
|
rtp_decoder_mode_t mode;
|
|
int rtp_offset;
|
|
struct timeval start_tv;
|
|
int frame_nr;
|
|
int error_cnt;
|
|
int rtp_cnt;
|
|
int rtcp_cnt;
|
|
} rtp_decoder_ctx_t;
|
|
|
|
typedef struct rtp_decoder_ctx_t *rtp_decoder_t;
|
|
|
|
/*
|
|
* error to string
|
|
*/
|
|
void rtp_print_error(srtp_err_status_t status, char *message);
|
|
|
|
/*
|
|
* prints the output of a random buffer in hexadecimal
|
|
*/
|
|
void hexdump(const void *ptr, size_t size);
|
|
|
|
/*
|
|
* the function usage() prints an error message describing how this
|
|
* program should be called, then calls exit()
|
|
*/
|
|
void usage(char *prog_name);
|
|
|
|
/*
|
|
* transforms base64 key into octet
|
|
*/
|
|
char *decode_sdes(char *in, char *out);
|
|
|
|
/*
|
|
* pcap handling
|
|
*/
|
|
void rtp_decoder_handle_pkt(u_char *arg,
|
|
const struct pcap_pkthdr *hdr,
|
|
const u_char *bytes);
|
|
|
|
rtp_decoder_t rtp_decoder_alloc(void);
|
|
|
|
void rtp_decoder_dealloc(rtp_decoder_t rtp_ctx);
|
|
|
|
int rtp_decoder_init(rtp_decoder_t dcdr,
|
|
srtp_policy_t policy,
|
|
rtp_decoder_mode_t mode);
|
|
|
|
int rtp_decoder_deinit(rtp_decoder_t decoder);
|
|
|
|
void rtp_decoder_srtp_log_handler(srtp_log_level_t level,
|
|
const char *msg,
|
|
void *data);
|
|
|
|
void rtp_decoder_srtp_log_handler(srtp_log_level_t level,
|
|
const char *msg,
|
|
void *data);
|
|
|
|
#endif /* RTP_DECODER_H */
|