src/purple/purple-dnsquery.c

   1 /**
   2  * @file purple-dnsquery.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010-12 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifdef _WIN32
  24 /* wrappers for write() & friends for socket handling */
  25 #include "win32/win32dep.h"
  26 #include <ws2tcpip.h>
  27 #else
  28 #include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <netinet/in.h>
  31 #include <arpa/inet.h>
  32 #endif
  33
  34 #include <glib.h>
  35
  36 #include "dnsquery.h"
  37 #include "dnssrv.h"
  38 #include "version.h"
  39
  40 #include "sipe-common.h"
  41 #include "sipe-backend.h"
  42 #include "sipe-core.h"
  43
  44 #include "purple-private.h"
  45
  46 struct sipe_dns_query {
  47         enum {
  48                 A,
  49                 SRV
  50         } type;
  51         sipe_dns_resolved_cb  callback;
  52         gpointer              extradata;
  53         gpointer              purple_query_data;
  54 };
  55
  56 static void dns_a_response(GSList *hosts,
  57                            struct sipe_dns_query *query,
  58                            const char *error_message)
  59 {
  60         char ipstr[INET6_ADDRSTRLEN];
  61         struct sockaddr *addr;
  62         const void *addrdata;
  63         int port;
  64
  65         if (error_message || !g_slist_next(hosts)) {
  66                 query->callback(query->extradata, NULL, 0);
  67                 g_slist_free(hosts);
  68                 return;
  69         }
  70
  71         addr = g_slist_next(hosts)->data;
  72         if (addr->sa_family == AF_INET6) {
  73                 /* OS provides addr so it must be properly aligned */
  74                 struct sockaddr_in6 *sin6 = (void *) addr;
  75                 addrdata = &sin6->sin6_addr;
  76                 port = sin6->sin6_port;
  77         } else {
  78                 /* OS provides addr so it must be properly aligned */
  79                 struct sockaddr_in *sin = (void *) addr;
  80                 addrdata = &sin->sin_addr;
  81                 port = sin->sin_port;
  82         }
  83
  84         inet_ntop(addr->sa_family, addrdata, ipstr, sizeof (ipstr));
  85
  86         query->callback(query->extradata, ipstr, port);
  87
  88         for (; hosts; hosts = g_slist_delete_link(hosts, hosts)) {
  89                 // Free the addrlen, no data in this link
  90                 hosts = g_slist_delete_link(hosts, hosts);
  91                 // Free the address
  92                 g_free(hosts->data);
  93         }
  94
  95         g_free(query);
  96 }
  97
  98 struct sipe_dns_query *sipe_backend_dns_query_a(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
  99                                                 const gchar *hostname,
 100                                                 guint port,
 101                                                 sipe_dns_resolved_cb callback,
 102                                                 gpointer data)
 103 {
 104         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 105 #if PURPLE_VERSION_CHECK(3,0,0)
 106         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 107 #endif
 108
 109         query->type = A;
 110         query->callback = callback;
 111         query->extradata = data;
 112         query->purple_query_data = purple_dnsquery_a(
 113 #if PURPLE_VERSION_CHECK(3,0,0)
 114                                                      purple_private->account,
 115 #endif
 116                                                      hostname,
 117                                                      port,
 118                                                      (PurpleDnsQueryConnectFunction) dns_a_response,
 119                                                      query);
 120
 121         return query;
 122 }
 123
 124
 125 static void dns_srv_response(PurpleSrvResponse *resp,
 126                              int results,
 127                              struct sipe_dns_query *query)
 128 {
 129         if (results)
 130                 query->callback(query->extradata, resp->hostname, resp->port);
 131         else
 132                 query->callback(query->extradata, NULL, 0);
 133
 134         g_free(query);
 135         g_free(resp);
 136 }
 137
 138 struct sipe_dns_query *sipe_backend_dns_query_srv(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
 139                                                   const gchar *protocol,
 140                                                   const gchar *transport,
 141                                                   const gchar *domain,
 142                                                   sipe_dns_resolved_cb callback,
 143                                                   gpointer data)
 144 {
 145         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 146 #if PURPLE_VERSION_CHECK(3,0,0)
 147         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 148 #endif
 149
 150         query->type = SRV;
 151         query->callback = callback;
 152         query->extradata = data;
 153         query->purple_query_data = purple_srv_resolve(
 154 #if PURPLE_VERSION_CHECK(3,0,0)
 155                                                       purple_private->account,
 156 #endif
 157                                                       protocol,
 158                                                       transport,
 159                                                       domain,
 160                                                       (PurpleSrvCallback) dns_srv_response,
 161                                                       query);
 162
 163         return query;
 164 }
 165
 166 void sipe_backend_dns_query_cancel(struct sipe_dns_query *query)
 167 {
 168         switch (query->type) {
 169                 case A:
 170                         purple_dnsquery_destroy(query->purple_query_data);
 171                         break;
 172                 case SRV:
 173 #if PURPLE_VERSION_CHECK(2,8,0) || PURPLE_VERSION_CHECK(3,0,0)
 174                         purple_srv_txt_query_destroy(query->purple_query_data);
 175 #else
 176                         purple_srv_cancel(query->purple_query_data);
 177 #endif
 178                         break;
 179         }
 180
 181         g_free(query);
 182 }
 183
 184 /*
 185   Local Variables:
 186   mode: c
 187   c-file-style: "bsd"
 188   indent-tabs-mode: t
 189   tab-width: 8
 190   End:
 191 */