lib/net_utils.c

   1 /*
   2  * Generic network code. Moved from net.c
   3  *
   4  * Copyright 1994 - 2000 Neil Russell.
   5  * Copyright 2000 Roland Borde
   6  * Copyright 2000 Paolo Scaffardi
   7  * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
   8  * Copyright 2009 Dirk Behme, dirk.behme@googlemail.com
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14
  15 struct in_addr string_to_ip(const char *s)
  16 {
  17         struct in_addr addr;
  18         char *e;
  19         int i;
  20
  21         addr.s_addr = 0;
  22         if (s == NULL)
  23                 return addr;
  24
  25         for (addr.s_addr = 0, i = 0; i < 4; ++i) {
  26                 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
  27                 if (val > 255) {
  28                         addr.s_addr = 0;
  29                         return addr;
  30                 }
  31                 if (i != 3 && *e != '.') {
  32                         addr.s_addr = 0;
  33                         return addr;
  34                 }
  35                 addr.s_addr <<= 8;
  36                 addr.s_addr |= (val & 0xFF);
  37                 if (s) {
  38                         s = (*e) ? e+1 : e;
  39                 }
  40         }
  41
  42         addr.s_addr = htonl(addr.s_addr);
  43         return addr;
  44 }