mono/utils/networking-fallback.c

   1 /*
   2  * networking-fallbacks.c: Fallback networking code that rely on old BSD apis or whatever else is available.
   3  *
   4  * Author:
   5  *      Rodrigo Kumpera (kumpera@gmail.com)
   6  *
   7  * (C) 2015 Xamarin
   8  */
   9
  10 #include <mono/utils/networking.h>
  11 #include <glib.h>
  12
  13 #ifdef HAVE_NETDB_H
  14 #include <netdb.h>
  15 #endif
  16
  17 #if !defined (HAVE_GETADDRINFO)
  18
  19 #if defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2)
  20
  21 static void
  22 add_hostent (MonoAddressInfo *info, int flags, struct hostent *h)
  23 {
  24         MonoAddressEntry *cur, *prev = info->entries;
  25         int idx = 0;
  26
  27         if (!h)
  28                 return;
  29
  30         if (!info->aliases)
  31                 info->aliases = g_strdupv (h->h_aliases);
  32
  33         while (h->h_addr_list [idx]) {
  34                 cur = g_new0 (MonoAddressEntry, 1);
  35                 if (prev)
  36                         prev->next = cur;
  37                 else
  38                         info->entries = cur;
  39
  40                 if (flags & MONO_HINT_CANONICAL_NAME && h->h_name)
  41                         cur->canonical_name = g_strdup (h->h_name);
  42
  43                 cur->family = h->h_addrtype;
  44                 cur->socktype = SOCK_STREAM;
  45                 cur->protocol = 0; /* Zero means the default stream protocol */
  46                 cur->address_len = h->h_length;
  47                 memcpy (&cur->address, h->h_addr_list [idx], h->h_length);
  48
  49                 prev = cur;
  50                 ++idx;
  51         }
  52 }
  53
  54 int
  55 mono_get_address_info (const char *hostname, int port, int flags, MonoAddressInfo **result)
  56 {
  57         MonoAddressInfo *addr_info;
  58         addr_info = g_new0 (MonoAddressInfo, 1);
  59
  60 #ifdef HAVE_GETHOSTBYNAME2
  61         if (flags & MONO_HINT_IPV6 || flags & MONO_HINT_UNSPECIFIED)
  62                 add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET6));
  63         if (flags & MONO_HINT_IPV4 || flags & MONO_HINT_UNSPECIFIED)
  64                 add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET));
  65 #else
  66         add_hostent (addr_info, flags, gethostbyname (hostname))
  67 #endif
  68
  69         if (!addr_info->entries) {
  70                 *result = NULL;
  71                 mono_free_address_info (addr_info);
  72                 return 1;
  73         }
  74
  75         *result = addr_info;
  76         return 0;
  77 }
  78
  79 #endif /* defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2) */
  80
  81 #endif /* !defined (HAVE_GETADDRINFO) */