| /* |
| * 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) 2001-2006 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_priv.h" |
| #include "rtp.h" |
| #include "datatypes.h" |
| |
| #define DEFAULT_RTP_OFFSET 42 |
| |
| typedef struct rtp_decoder_ctx_t { |
| srtp_policy_t policy; |
| srtp_ctx_t *srtp_ctx; |
| int rtp_offset; |
| struct timeval start_tv; |
| int frame_nr; |
| rtp_msg_t message; |
| } rtp_decoder_ctx_t; |
| |
| typedef struct rtp_decoder_ctx_t *rtp_decoder_t; |
| |
| /* |
| * error to string |
| */ |
| |
| void rtp_print_error(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); |
| |
| err_status_t |
| rtp_decoder_init_srtp(rtp_decoder_t decoder, unsigned int ssrc); |
| |
| int |
| rtp_decoder_deinit_srtp(rtp_decoder_t decoder); |
| |
| #endif /* RTP_DECODER_H */ |