FreeRTOS/Common/ethernet/uIP/uip-1.0/uip/uiplib.c

   1 /*
   2  * Copyright (c) 2004, Adam Dunkels and the Swedish Institute of
   3  * Computer Science.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote
  15  *    products derived from this software without specific prior
  16  *    written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  24  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  26  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * This file is part of the uIP TCP/IP stack
  31  *
  32  * $Id: uiplib.c,v 1.2 2006/06/12 08:00:31 adam Exp $
  33  *
  34  */
  35
  36
  37 #include "uip.h"
  38 #include "uiplib.h"
  39
  40
  41 /*-----------------------------------------------------------------------------------*/
  42 unsigned char
  43 uiplib_ipaddrconv(char *addrstr, unsigned char *ipaddr)
  44 {
  45   unsigned char tmp;
  46   char c;
  47   unsigned char i, j;
  48
  49   tmp = 0;
  50
  51   for(i = 0; i < 4; ++i) {
  52     j = 0;
  53     do {
  54       c = *addrstr;
  55       ++j;
  56       if(j > 4) {
  57         return 0;
  58       }
  59       if(c == '.' || c == 0) {
  60         *ipaddr = tmp;
  61         ++ipaddr;
  62         tmp = 0;
  63       } else if(c >= '0' && c <= '9') {
  64         tmp = (tmp * 10) + (c - '0');
  65       } else {
  66         return 0;
  67       }
  68       ++addrstr;
  69     } while(c != '.' && c != 0);
  70   }
  71   return 1;
  72 }
  73
  74 /*-----------------------------------------------------------------------------------*/