contrib/hostapd/src/utils/ip_addr.c

   1 /*
   2  * IP address processing
   3  * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "ip_addr.h"
  19
  20 const char * hostapd_ip_txt(const struct hostapd_ip_addr *addr, char *buf,
  21                             size_t buflen)
  22 {
  23         if (buflen == 0 || addr == NULL)
  24                 return NULL;
  25
  26         if (addr->af == AF_INET) {
  27                 os_strlcpy(buf, inet_ntoa(addr->u.v4), buflen);
  28         } else {
  29                 buf[0] = '\0';
  30         }
  31 #ifdef CONFIG_IPV6
  32         if (addr->af == AF_INET6) {
  33                 if (inet_ntop(AF_INET6, &addr->u.v6, buf, buflen) == NULL)
  34                         buf[0] = '\0';
  35         }
  36 #endif /* CONFIG_IPV6 */
  37
  38         return buf;
  39 }
  40
  41
  42 int hostapd_ip_diff(struct hostapd_ip_addr *a, struct hostapd_ip_addr *b)
  43 {
  44         if (a == NULL && b == NULL)
  45                 return 0;
  46         if (a == NULL || b == NULL)
  47                 return 1;
  48
  49         switch (a->af) {
  50         case AF_INET:
  51                 if (a->u.v4.s_addr != b->u.v4.s_addr)
  52                         return 1;
  53                 break;
  54 #ifdef CONFIG_IPV6
  55         case AF_INET6:
  56                 if (os_memcmp(&a->u.v6, &b->u.v6, sizeof(a->u.v6)) != 0)
  57                         return 1;
  58                 break;
  59 #endif /* CONFIG_IPV6 */
  60         }
  61
  62         return 0;
  63 }
  64
  65
  66 int hostapd_parse_ip_addr(const char *txt, struct hostapd_ip_addr *addr)
  67 {
  68 #ifndef CONFIG_NATIVE_WINDOWS
  69         if (inet_aton(txt, &addr->u.v4)) {
  70                 addr->af = AF_INET;
  71                 return 0;
  72         }
  73
  74 #ifdef CONFIG_IPV6
  75         if (inet_pton(AF_INET6, txt, &addr->u.v6) > 0) {
  76                 addr->af = AF_INET6;
  77                 return 0;
  78         }
  79 #endif /* CONFIG_IPV6 */
  80 #endif /* CONFIG_NATIVE_WINDOWS */
  81
  82         return -1;
  83 }