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/* rtp_stream_id.c
* RTP stream id functions for Wireshark
*
* Copyright 2003, Alcatel Business Systems
* By Lars Ruoff <lars.ruoff@gmx.net>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "file.h"
#include "ui/rtp_stream_id.h"
#include "epan/dissectors/packet-rtp.h"
/****************************************************************************/
/* rtpstream id functions */
/****************************************************************************/
/****************************************************************************/
/* deep copy of id */
void rtpstream_id_copy(const rtpstream_id_t *src, rtpstream_id_t *dest)
{
copy_address(&(dest->src_addr), &(src->src_addr));
dest->src_port=src->src_port;
copy_address(&(dest->dst_addr), &(src->dst_addr));
dest->dst_port=src->dst_port;
dest->ssrc=src->ssrc;
}
/****************************************************************************/
/* deep copy of id from packet_info */
void rtpstream_id_copy_pinfo(const packet_info *pinfo, rtpstream_id_t *dest, bool swap_src_dst)
{
if (!swap_src_dst)
{
copy_address(&(dest->src_addr), &(pinfo->src));
dest->src_port=pinfo->srcport;
copy_address(&(dest->dst_addr), &(pinfo->dst));
dest->dst_port=pinfo->destport;
}
else
{
copy_address(&(dest->src_addr), &(pinfo->dst));
dest->src_port=pinfo->destport;
copy_address(&(dest->dst_addr), &(pinfo->src));
dest->dst_port=pinfo->srcport;
}
}
/****************************************************************************/
/* shallow copy from packet_info to id */
void rtpstream_id_copy_pinfo_shallow(const packet_info *pinfo, rtpstream_id_t *dest, bool swap_src_dst)
{
if (!swap_src_dst)
{
copy_address_shallow(&(dest->src_addr), &(pinfo->src));
dest->src_port=pinfo->srcport;
copy_address_shallow(&(dest->dst_addr), &(pinfo->dst));
dest->dst_port=pinfo->destport;
}
else
{
copy_address_shallow(&(dest->src_addr), &(pinfo->dst));
dest->src_port=pinfo->destport;
copy_address_shallow(&(dest->dst_addr), &(pinfo->src));
dest->dst_port=pinfo->srcport;
}
}
/****************************************************************************/
/* free memory allocated for id */
void rtpstream_id_free(rtpstream_id_t *id)
{
free_address(&(id->src_addr));
free_address(&(id->dst_addr));
memset(id, 0, sizeof(*id));
}
/****************************************************************************/
/* convert rtpstream_id_t to hash */
unsigned rtpstream_id_to_hash(const rtpstream_id_t *id)
{
unsigned hash = 0;
if (!id) { return 0; }
/* XOR of: */
/* SRC PORT | DST_PORT */
/* SSRC */
/* SRC ADDR */
/* DST ADDR */
hash ^= id->src_port | id->dst_port << 16;
hash ^= id->ssrc;
hash = add_address_to_hash(hash, &id->src_addr);
hash = add_address_to_hash(hash, &id->dst_addr);
return hash;
}
/****************************************************************************/
/* compare two ids by flags */
bool rtpstream_id_equal(const rtpstream_id_t *id1, const rtpstream_id_t *id2, unsigned flags)
{
if (addresses_equal(&(id1->src_addr), &(id2->src_addr))
&& id1->src_port == id2->src_port
&& addresses_equal(&(id1->dst_addr), &(id2->dst_addr))
&& id1->dst_port == id2->dst_port)
{
bool equal = true;
if ((flags & RTPSTREAM_ID_EQUAL_SSRC)
&& id1->ssrc != id2->ssrc)
{
equal = false;
}
return equal;
}
return false;
}
/****************************************************************************/
/* compare an rtpstream id address and ports with pinfo */
bool rtpstream_id_equal_pinfo(const rtpstream_id_t *id, const packet_info *pinfo, bool swap_src_dst)
{
if (!swap_src_dst) {
if (addresses_equal(&(id->src_addr), &(pinfo->src))
&& id->src_port == pinfo->srcport
&& addresses_equal(&(id->dst_addr), &(pinfo->dst))
&& id->dst_port == pinfo->destport)
{
return true;
}
} else {
if (addresses_equal(&(id->src_addr), &(pinfo->dst))
&& id->src_port == pinfo->destport
&& addresses_equal(&(id->dst_addr), &(pinfo->src))
&& id->dst_port == pinfo->srcport)
{
return true;
}
}
return false;
}
/****************************************************************************/
/* compare two ids, one in pinfo */
bool rtpstream_id_equal_pinfo_rtp_info(const rtpstream_id_t *id, const packet_info *pinfo, const struct _rtp_info *rtp_info)
{
if (addresses_equal(&(id->src_addr), &(pinfo->src))
&& id->src_port == pinfo->srcport
&& addresses_equal(&(id->dst_addr), &(pinfo->dst))
&& id->dst_port == pinfo->destport
&& id->ssrc == rtp_info->info_sync_src)
{
return true;
}
return false;
}
/****************************************************************************/
/* convert packet_info and _rtp_info to hash */
unsigned pinfo_rtp_info_to_hash(const packet_info *pinfo, const struct _rtp_info *rtp_info)
{
unsigned hash = 0;
if (!pinfo || !rtp_info) { return 0; }
/* XOR of: */
/* SRC PORT | DST_PORT */
/* SSRC */
/* SRC ADDR */
/* DST ADDR */
hash ^= pinfo->srcport | pinfo->destport << 16;
hash ^= rtp_info->info_sync_src;
hash = add_address_to_hash(hash, &pinfo->src);
hash = add_address_to_hash(hash, &pinfo->dst);
return hash;
}
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