uiplib.c

FreeRTOS is a portable, open source, mini Real Time Kernel - a free to download and royalty free RTO

/*
 * Copyright (c) 2004, Adam Dunkels and the Swedish Institute of
 * Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file is part of the uIP TCP/IP stack
 *
 * $Id: uiplib.c,v 1.2 2006/06/12 08:00:31 adam Exp $
 *
 */
#include "uip.h"
#include "uiplib.h"

/*-----------------------------------------------------------------------------------*/
unsigned char uiplib_ipaddrconv( char *addrstr, unsigned char *ipaddr )
{
	unsigned char	tmp;
	char			c;
	unsigned char	i, j;

	tmp = 0;

	for( i = 0; i < 4; ++i )
	{
		j = 0;
		do
		{
			c = *addrstr;
			++j;
			if( j > 4 )
			{
				return 0;
			}

			if( c == '.' || c == 0 )
			{
				*ipaddr = tmp;
				++ipaddr;
				tmp = 0;
			}
			else if( c >= '0' && c <= '9' )
			{
				tmp = ( tmp * 10 ) + ( c - '0' );
			}
			else
			{
				return 0;
			}

			++addrstr;
		} while( c != '.' && c != 0 );
	}

	return 1;
}

/*-----------------------------------------------------------------------------------*/