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/*****************************************************************************
* rtp_check_seqnum.c: Prints RTP discontinuities
*****************************************************************************
* Copyright (C) 2011 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject
* to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <bitstream/ietf/rtp.h>
/*****************************************************************************
* Local declarations
*****************************************************************************/
#define DEFAULT_PACKET_SIZE 1328
/*****************************************************************************
* Main loop
*****************************************************************************/
static void usage(const char *psz)
{
fprintf(stderr, "usage: multicat -u -m <packet size> @<addr>:<port> | %s [<packet size>]\n", psz);
exit(EXIT_FAILURE);
}
int main(int i_argc, char **ppsz_argv)
{
int i_packet_size = DEFAULT_PACKET_SIZE;
if (ppsz_argv[1] != NULL &&
(!strcmp(ppsz_argv[1], "-h") || !strcmp(ppsz_argv[1], "--help")))
usage(ppsz_argv[0]);
if (ppsz_argv[1] != NULL)
i_packet_size = atoi(ppsz_argv[1]);
if (i_packet_size > 65535 || i_packet_size < RTP_HEADER_SIZE)
usage(ppsz_argv[0]);
uint8_t p_buffer[i_packet_size];
uint16_t i_seqnum = 0;
for ( ; ; ) {
ssize_t toto;
if ((toto=read(STDIN_FILENO, p_buffer, i_packet_size)) != i_packet_size) {
fprintf(stderr, "couldn't read %zd\n", toto);
exit(EXIT_FAILURE);
}
if (!rtp_check_hdr(p_buffer)) {
fprintf(stderr, "invalid RTP header\n");
continue;
}
uint16_t i_new_seqnum = rtp_get_seqnum(p_buffer);
if (i_new_seqnum != i_seqnum)
fprintf(stderr, "received packet %hu while expecting %hu\n",
i_new_seqnum, i_seqnum);
i_seqnum = (i_new_seqnum + 1) % 65536;
}
}
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