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73 lines
2.5 KiB
73 lines
2.5 KiB
/*****************************************************************************
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* rtp_check_seqnum.c: Prints RTP discontinuities
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*****************************************************************************
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* Copyright (C) 2011 VideoLAN
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* $Id: dvb_print_si.c 27 2011-04-10 16:57:59Z massiot $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software. It comes without any warranty, to
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* the extent permitted by applicable law. You can redistribute it
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* and/or modify it under the terms of the Do What The Fuck You Want
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* To Public License, Version 2, as published by Sam Hocevar. See
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* http://sam.zoy.org/wtfpl/COPYING for more details.
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*****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <bitstream/ietf/rtp.h>
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/*****************************************************************************
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* Local declarations
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*****************************************************************************/
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#define DEFAULT_PACKET_SIZE 1328
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/*****************************************************************************
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* Main loop
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*****************************************************************************/
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static void usage(const char *psz)
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{
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fprintf(stderr, "usage: multicat -u -m <packet size> @<addr>:<port> | %s [<packet size>]\n", psz);
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exit(EXIT_FAILURE);
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}
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int main(int i_argc, char **ppsz_argv)
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{
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int i_packet_size = DEFAULT_PACKET_SIZE;
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if (ppsz_argv[1] != NULL &&
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(!strcmp(ppsz_argv[1], "-h") || !strcmp(ppsz_argv[1], "--help")))
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usage(ppsz_argv[0]);
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if (ppsz_argv[1] != NULL)
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i_packet_size = atoi(ppsz_argv[1]);
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if (i_packet_size > 65535 || i_packet_size < RTP_HEADER_SIZE)
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usage(ppsz_argv[0]);
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uint8_t p_buffer[i_packet_size];
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uint16_t i_seqnum = 0;
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for ( ; ; ) {
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ssize_t toto;
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if ((toto=read(STDIN_FILENO, p_buffer, i_packet_size)) != i_packet_size) {
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fprintf(stderr, "couldn't read %zd\n", toto);
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exit(EXIT_FAILURE);
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}
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if (!rtp_check_hdr(p_buffer)) {
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fprintf(stderr, "invalid RTP header\n");
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continue;
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}
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uint16_t i_new_seqnum = rtp_get_seqnum(p_buffer);
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if (i_new_seqnum != i_seqnum)
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fprintf(stderr, "received packet %hu while expecting %hu\n",
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i_new_seqnum, i_seqnum);
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i_seqnum = (i_new_seqnum + 1) % 65536;
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}
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}
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