is_valid_multicast_address.c

linuxUNIX下跑的一套服务端程序

/* * 
 *  $Id$
 *  
 *  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 <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <fenice/multicast.h>
#include <fenice/types.h>
#include <fenice/utils.h>

uint32 is_valid_multicast_address(char *ip){
	 /* This only works on IPv4 for right now */
	struct in_addr haddr;
	unsigned int addr;

	if(!ip)
		return ERR_PARSE;

	if(!inet_aton(ip, &haddr))
		return ERR_PARSE;  /* not a valid address */

	addr = htonl( haddr.s_addr );

	if ((addr & 0xF0000000) == 0xE0000000)
		return ERR_NOERROR;

	return ERR_GENERIC;

}