mono/utils/networking-fallback.c

   1 /**
   2  * \file
   3  * Fallback networking code that rely on old BSD apis or whatever else is available.
   4  *
   5  * Author:
   6  *      Rodrigo Kumpera (kumpera@gmail.com)
   7  *
   8  * (C) 2015 Xamarin
   9  */
  10
  11 #include <mono/utils/networking.h>
  12 #include <glib.h>
  13 #include <mono/utils/mono-compiler.h>
  14
  15 #ifdef HAVE_NETDB_H
  16 #include <netdb.h>
  17 #endif
  18
  19 #if !defined (HAVE_GETADDRINFO)
  20
  21 #if defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2)
  22
  23 static void
  24 add_hostent (MonoAddressInfo *info, int flags, struct hostent *h)
  25 {
  26         MonoAddressEntry *cur, *prev = info->entries;
  27         int idx = 0;
  28
  29         if (!h)
  30                 return;
  31
  32         if (!info->aliases)
  33                 info->aliases = g_strdupv (h->h_aliases);
  34
  35         while (h->h_addr_list [idx]) {
  36                 cur = g_new0 (MonoAddressEntry, 1);
  37                 if (prev)
  38                         prev->next = cur;
  39                 else
  40                         info->entries = cur;
  41
  42                 if (flags & MONO_HINT_CANONICAL_NAME && h->h_name)
  43                         cur->canonical_name = g_strdup (h->h_name);
  44
  45                 cur->family = h->h_addrtype;
  46                 cur->socktype = SOCK_STREAM;
  47                 cur->protocol = 0; /* Zero means the default stream protocol */
  48                 cur->address_len = h->h_length;
  49                 memcpy (&cur->address, h->h_addr_list [idx], h->h_length);
  50
  51                 prev = cur;
  52                 ++idx;
  53         }
  54 }
  55
  56 int
  57 mono_get_address_info (const char *hostname, int port, int flags, MonoAddressInfo **result)
  58 {
  59         MonoAddressInfo *addr_info;
  60         addr_info = g_new0 (MonoAddressInfo, 1);
  61
  62 #ifdef HAVE_GETHOSTBYNAME2
  63         if (flags & MONO_HINT_IPV6 || flags & MONO_HINT_UNSPECIFIED)
  64                 add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET6));
  65         if (flags & MONO_HINT_IPV4 || flags & MONO_HINT_UNSPECIFIED)
  66                 add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET));
  67 #else
  68         add_hostent (addr_info, flags, gethostbyname (hostname))
  69 #endif
  70
  71         if (!addr_info->entries) {
  72                 *result = NULL;
  73                 mono_free_address_info (addr_info);
  74                 return 1;
  75         }
  76
  77         *result = addr_info;
  78         return 0;
  79 }
  80
  81 #endif /* defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2) */
  82 #else /* !defined (HAVE_GETADDRINFO) */
  83
  84 MONO_EMPTY_SOURCE_FILE (networking_fallback);
  85 #endif /* !defined (HAVE_GETADDRINFO) */