rtsp_handler.c

linux下的rtp的实例源代码

/* * 
 *  $Id: RTSP_handler.c 350 2006-05-31 18:22:15Z shawill $
 *  
 *  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 <string.h>

#include <fenice/rtsp.h>
#include <fenice/utils.h>
#include <fenice/fnc_log.h>

int RTSP_handler(RTSP_buffer *rtsp)
{
	unsigned short status;
	char msg[100];
	int m, op;
	int full_msg;
	RTP_session *rtp_s;
	int hlen, blen;
	
	while (rtsp->in_size) {
		switch ( (full_msg = RTSP_full_msg_rcvd(rtsp, &hlen, &blen)) ) {
			case RTSP_method_rcvd:
				op = RTSP_valid_response_msg(&status, msg, rtsp);
				if (op == 0) {
					// There is NOT an input RTSP message, therefore it's a request
					m = RTSP_validate_method(rtsp);
					if (m < 0) {
						// Bad request: non-existing method
						fnc_log(FNC_LOG_INFO,"Bad Request ");
						send_reply(400, NULL, rtsp);
					} else
						RTSP_state_machine(rtsp, m);
				} else {
					// There's a RTSP answer in input.
					if (op == ERR_GENERIC) {
						// Invalid answer
					}
				}
				RTSP_discard_msg(rtsp);
				break;
			case RTSP_interlvd_rcvd:
				m = rtsp->in_buffer[1];
				for (rtp_s = (rtsp->session_list)?rtsp->session_list->rtp_session:NULL; \
					rtp_s && ((rtp_s->transport.u.tcp.interleaved.RTP == m) || (rtp_s->transport.u.tcp.interleaved.RTCP == m)); \
					rtp_s = rtp_s->next)
				if (rtp_s) {
					if (m==rtp_s->transport.u.tcp.interleaved.RTCP) { // RTCP pkt arrived
						fnc_log(FNC_LOG_DEBUG,"Interleaved RTCP packet arrived for channel %d (len: %d).\n", m, blen);
						if (sizeof(rtp_s->rtcp_inbuffer)>=hlen+blen) {
							memcpy(rtp_s->rtcp_inbuffer, &rtsp->in_buffer[hlen], hlen+ blen);
							rtp_s->rtcp_insize = blen;
						} else
							fnc_log(FNC_LOG_DEBUG,"Interleaved RTCP packet too big!.\n", m);
						RTCP_recv_packet(rtp_s);
					} else // RTP pkt arrived: do nothing...
						fnc_log(FNC_LOG_DEBUG,"Interleaved RTP packet arrived for channel %d.\n", m);
				} else
					fnc_log(FNC_LOG_DEBUG,"Interleaved RTP or RTCP packet arrived for unknown channel (%d)... discarding.\n", m);
				RTSP_discard_msg(rtsp);
				break;
			default:
				return full_msg;
				break;
		}
	}
	
	return ERR_NOERROR;
}