rtcp_recv_packet.c

linuxUNIX下跑的一套服务端程序

/* * 
 *  $Id: RTCP_recv_packet.c 164 2005-06-06 11:53:36Z federico $
 *  
 *  This file is part of Fenice
 *
 *  Fenice -- Open Media Server
 *
 *  Copyright (C) 2004 by
 *  	
 *	- Giampaolo Mancini	<[e-mail]>
 *	- Francesco Varano	<[e-mail]>
 *	- Marco Penno		<[e-mail]>
 *	- Federico Ridolfo	<[e-mail]>
 *	- Eugenio Menegatti 	<[e-mail]>
 *	- Stefano Cau
 *	- Giuliano Emma
 *	- Stefano Oldrini
 * 
 *  Fenice is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Fenice is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Fenice; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *  
 * */

#include <stdio.h>
#include <netinet/in.h>

#include <fenice/rtcp.h>
#include <fenice/rtp.h>
#include <fenice/utils.h>
#include <fenice/fnc_log.h>

int RTCP_recv_packet(RTP_session *session)
{
	short len=0;
	for (len=0; len<session->rtcp_insize;) {		
    	switch (session->rtcp_inbuffer[1+len]) {
    		case SR: {
    			int ssrc_count,i;
    			unsigned char tmp[4];
//    			printf("SR\n");
			fnc_log(FNC_LOG_VERBOSE, "RTCP SR packet received\n");
    			session->rtcp_stats[i_client].SR_received += 1;
    			session->rtcp_stats[i_client].pkt_count=*((int*)&(session->rtcp_inbuffer[20+len]));
    			session->rtcp_stats[i_client].octet_count=*((int*)&(session->rtcp_inbuffer[24+len]));
    			ssrc_count=session->rtcp_inbuffer[0+len] & 0x1f;
    			for (i=0; i<ssrc_count; ++i) {
    				session->rtcp_stats[i_client].fract_lost=session->rtcp_inbuffer[32+len];
    				tmp[0]=0;
    				tmp[1]=session->rtcp_inbuffer[33+len];
    				tmp[2]=session->rtcp_inbuffer[34+len];
    				tmp[3]=session->rtcp_inbuffer[35+len];
    				session->rtcp_stats[i_client].pkt_lost=ntohl(*((int*)tmp));
    				session->rtcp_stats[i_client].highest_seq_no=ntohl(session->rtcp_inbuffer[36+len]);
    				session->rtcp_stats[i_client].jitter=ntohl(session->rtcp_inbuffer[40+len]);
    				session->rtcp_stats[i_client].last_SR=ntohl(session->rtcp_inbuffer[44+len]);
    				session->rtcp_stats[i_client].delay_since_last_SR=ntohl(session->rtcp_inbuffer[48+len]);
    			}
    			break;
    		}
    		case RR: {
    			int ssrc_count,i;
    			unsigned char tmp[4];
//    			printf("RR\n");
			fnc_log(FNC_LOG_VERBOSE, "RTCP RR packet received\n");
    			session->rtcp_stats[i_client].RR_received += 1;
    			ssrc_count=session->rtcp_inbuffer[0+len] & 0x1f;
    			for (i=0; i<ssrc_count; ++i) {
    				session->rtcp_stats[i_client].fract_lost=session->rtcp_inbuffer[12+len];
    				tmp[0]=0;
    				tmp[1]=session->rtcp_inbuffer[13+len];
    				tmp[2]=session->rtcp_inbuffer[14+len];
    				tmp[3]=session->rtcp_inbuffer[15+len];
    				session->rtcp_stats[i_client].pkt_lost=ntohl(*((int*)tmp));
    				session->rtcp_stats[i_client].highest_seq_no=ntohl(session->rtcp_inbuffer[16+len]);
    				session->rtcp_stats[i_client].jitter=ntohl(session->rtcp_inbuffer[20+len]);
    				session->rtcp_stats[i_client].last_SR=ntohl(session->rtcp_inbuffer[24+len]);
    				session->rtcp_stats[i_client].delay_since_last_SR=ntohl(session->rtcp_inbuffer[28+len]);
    			}    		
    			break;
    		}
    		case SDES: {
//    			printf("SDES\n");    			
			fnc_log(FNC_LOG_VERBOSE, "RTCP SDES packet received\n");
    			switch (session->rtcp_inbuffer[8]) {
    				case CNAME: {
		    			session->rtcp_stats[1].dest_SSRC=ntohs(*((int*)&(session->rtcp_inbuffer[4])));
		    			break;
	    			}
	    			case NAME: {
	    				break;
	    			}
	    			case EMAIL: {
	    				break;
	    			}
	    			case PHONE: {
	    				break;
	    			}
	    			case LOC: {
	    				break;
	    			}
	    			case TOOL: {
	    				break;
	    			}
	    			case NOTE: {
	    				break;
	    			}
	    			case PRIV: {
	    				break;
	    			}
	    		}
    			break;
    		}
    		case BYE: {    			
//    			printf("BYE\n");		
			fnc_log(FNC_LOG_VERBOSE, "RTCP BYE packet received\n");
    			break;
    		}
    		case APP: {
//    			printf("APP\n");		
			fnc_log(FNC_LOG_VERBOSE, "RTCP APP packet received\n");
    			break;
    		}
    		default: {
    			fnc_log(FNC_LOG_VERBOSE,"Unknown RTCP received and ignored.\n");
    			return ERR_NOERROR;
    		}
    	}
    	len+=(ntohs(*((short*)&(session->rtcp_inbuffer[len+2])))+1)*4;
	}
	return ERR_NOERROR;
}