?? rtp.c
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/**************************************************************************** ** File: rtp.c**** Author: Mike Borella**** Comments: Dump RTP header information. *******************************************************************************/#include <stdio.h>#include "config.h"#include "rtp.h"extern u_char *packet_end;/*----------------------------------------------------------------------------**** dump_rtp()**** Parse RTP packet and dump fields****----------------------------------------------------------------------------*/void dump_rtp(u_char *bp, int length){ u_char *ep = bp + length; u_char *p; RtpHdr *rtp; int i; /* * Make sure we don't run off the end of the packet */ if (ep > packet_end) ep = packet_end; p = bp; printf("-----------------------------------------------------------------\n"); printf(" RTP Header\n"); printf("-----------------------------------------------------------------\n"); rtp = (RtpHdr *) p; printf("Version: %d\n", (int) rtp->version); printf("Padding: %d\n", (int) rtp->padding); printf("Extension: %d\n", (int) rtp->extension); printf("CSRC count: %d\n", (int) rtp->csrc_count); printf("Marker: %d\n", (int) rtp->marker); printf("Payload type: %d\n", (int) rtp->payload_type); printf("Sequence number: %d\n", (u_int16_t) rtp->seqno); printf("Timestamp: %d\n", (u_int32_t) rtp->timestamp); printf("SSRC: %d\n", (u_int32_t) rtp->ssrc); p = p + sizeof(RtpHdr); /* * Dump contributing sources */ for (i=0; i < rtp->csrc_count; i++) { printf("CSRC %d\n", EXTRACT_32BITS(p)); p = p + sizeof(u_int32_t); if (p > ep) { printf("beyond end of packet\n"); return; } }}?? 快捷鍵說明
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