rt-thread/components/net/uip/uip/uiplib.c

/*
 * 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;
}

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