inet_aton.c

来自「linux network safe toolse」· C语言 代码 · 共 44 行

/* $Id$ */
/****************************************************************************
 *
 * Copyright (C) 2004-2008 Sourcefire, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 2 as
 * published by the Free Software Foundation.  You may not use, modify or
 * distribute this program under any other version of the GNU General
 * Public License.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ****************************************************************************/
 


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif


/* Convert from "a.b.c.d" IP address string into
 * an in_addr structure.  Returns 0 on failure,
 * and 1 on success.
 */
int inet_aton(const char *cp, struct in_addr *addr)
{
    if( cp==NULL || addr==NULL )
    {
        return(0);
    }

    addr->s_addr = inet_addr(cp);
    return (addr->s_addr == INADDR_NONE) ? 0 : 1;
}