rtsp_describe.c

linuxUNIX下跑的一套服务端程序

/* * 
 *  $Id: RTSP_describe.c 176 2005-06-28 14:47:59Z 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 <stdio.h>
#include <string.h>

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

/*
 	****************************************************************
 	*			DESCRIBE METHOD HANDLING
 	****************************************************************
*/
int RTSP_describe(RTSP_buffer * rtsp)
{
	int valid_url, res;
	char object[255], server[255], trash[255];
	char *p;
	unsigned short port;
	char url[255];
	media_entry media, req;
	description_format descr_format = df_SDP_format;	// shawill put to some default
	char descr[MAX_DESCR_LENGTH];


	/* Extract la URL */
	if (!sscanf(rtsp->in_buffer, " %*s %254s ", url)) {
		send_reply(400, 0, rtsp);	/* bad request */
		return ERR_NOERROR;
	}
	/* Validate the URL */
	if (!parse_url(url, server, &port, object)) {
		send_reply(400, 0, rtsp);	/* bad request */
		return ERR_NOERROR;
	}
	if (strcmp(server, prefs_get_hostname()) != 0) {	/* Currently this feature is disabled. */
		/* wrong server name */
		//      send_reply(404, 0 , rtsp);  /* Not Found */
		//      return ERR_NOERROR;
	}
	if (strstr(object, "../")) {
		/* disallow relative paths outside of current directory. */
		send_reply(403, 0, rtsp);	/* Forbidden */
		return ERR_NOERROR;
	}
	if (strstr(object, "./")) {
		/* Disallow ./ */
		send_reply(403, 0, rtsp);	/* Forbidden */
		return ERR_NOERROR;
	}
	p = strrchr(object, '.');
	valid_url = 0;
	if (p == NULL) {
		send_reply(415, 0, rtsp);	/* Unsupported media type */
		return ERR_NOERROR;
	} else {
		valid_url = is_supported_url(p);
	}
	if (!valid_url) {
		send_reply(415, 0, rtsp);	/* Unsupported media type */
		return ERR_NOERROR;
	}
	// Disallow Header REQUIRE
	if (strstr(rtsp->in_buffer, HDR_REQUIRE)) {
		send_reply(551, 0, rtsp);	/* Option not supported */
		return ERR_NOERROR;
	}


	/* Get the description format. SDP is recomended */
	if (strstr(rtsp->in_buffer, HDR_ACCEPT) != NULL) {
		if (strstr(rtsp->in_buffer, "application/sdp") != NULL) {
			descr_format = df_SDP_format;
		} else {
			// Add here new description formats
			send_reply(551, 0, rtsp);	/* Option not supported */
			return ERR_NOERROR;
		}
	}
	// Get the CSeq 
	if ((p = strstr(rtsp->in_buffer, HDR_CSEQ)) == NULL) {
		send_reply(400, 0, rtsp);	/* Bad Request */
		return ERR_NOERROR;
	} else {
		if (sscanf(p, "%254s %d", trash, &(rtsp->rtsp_cseq)) != 2) {
			send_reply(400, 0, rtsp);	/* Bad Request */
			return ERR_NOERROR;
		}
	}


	memset(&media, 0, sizeof(media));
	memset(&req, 0, sizeof(req));
	req.flags = ME_DESCR_FORMAT;
	req.descr_format = descr_format;
	res = get_media_descr(object, &req, &media, descr);
	if (res == ERR_NOT_FOUND) {
		send_reply(404, 0, rtsp);	// Not found
		return ERR_NOERROR;
	}
	if (res == ERR_PARSE || res == ERR_GENERIC || res == ERR_ALLOC) {
		send_reply(500, 0, rtsp);	// Internal server error
		return ERR_NOERROR;
	}

	if(max_connection()==ERR_GENERIC){
		/*redirect*/
		return send_redirect_3xx(rtsp, object);
	}


	fnc_log(FNC_LOG_INFO,"DESCRIBE %s RTSP/1.0 ",url);
	send_describe_reply(rtsp, object, descr_format, descr);
	
	// See User-Agent 
	if ((p=strstr(rtsp->in_buffer, HDR_USER_AGENT))!=NULL) {
		char cut[strlen(p)];
		strcpy(cut,p);
		p=strstr(cut, "\n");
		cut[strlen(cut)-strlen(p)-1]='\0';
		fnc_log(FNC_LOG_CLIENT,"%s\n",cut);
	}
	else
		fnc_log(FNC_LOG_CLIENT,"- \n");

	return ERR_NOERROR;
}