FreeRTOS/Common/ethernet/FreeRTOS-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 #include "uip.h"
  36 #include "uiplib.h"
  37
  38 /*-----------------------------------------------------------------------------------*/
  39 unsigned char uiplib_ipaddrconv( char *addrstr, unsigned char *ipaddr )
  40 {
  41         unsigned char   tmp;
  42         char                    c;
  43         unsigned char   i, j;
  44
  45         tmp = 0;
  46
  47         for( i = 0; i < 4; ++i )
  48         {
  49                 j = 0;
  50                 do
  51                 {
  52                         c = *addrstr;
  53                         ++j;
  54                         if( j > 4 )
  55                         {
  56                                 return 0;
  57                         }
  58
  59                         if( c == '.' || c == 0 )
  60                         {
  61                                 *ipaddr = tmp;
  62                                 ++ipaddr;
  63                                 tmp = 0;
  64                         }
  65                         else if( c >= '0' && c <= '9' )
  66                         {
  67                                 tmp = ( tmp * 10 ) + ( c - '0' );
  68                         }
  69                         else
  70                         {
  71                                 return 0;
  72                         }
  73
  74                         ++addrstr;
  75                 } while( c != '.' && c != 0 );
  76         }
  77
  78         return 1;
  79 }
  80
  81 /*-----------------------------------------------------------------------------------*/