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 #include "win32/win32dep.h" /* for inet_ntop() */
  25 #include <ws2tcpip.h>
  26 #else
  27 #include <arpa/inet.h>
  28 #include <netinet/in.h>
  29 #include <sys/socket.h>
  30 #endif
  31
  32 #include <glib.h>
  33
  34 #include "dnsquery.h"
  35 #include "dnssrv.h"
  36 #include "version.h"
  37
  38 #include "sipe-common.h"
  39 #include "sipe-backend.h"
  40 #include "sipe-core.h"
  41
  42 #include "purple-private.h"
  43
  44 struct sipe_dns_query {
  45         enum {
  46                 A,
  47                 SRV
  48         } type;
  49         sipe_dns_resolved_cb  callback;
  50         gpointer              extradata;
  51         gpointer              purple_query_data;
  52 };
  53
  54 static void dns_a_response(GSList *hosts,
  55                            struct sipe_dns_query *query,
  56                            const char *error_message)
  57 {
  58         char ipstr[INET6_ADDRSTRLEN];
  59         struct sockaddr *addr;
  60         const void *addrdata;
  61         int port;
  62
  63         if (error_message || !g_slist_next(hosts)) {
  64                 query->callback(query->extradata, NULL, 0);
  65                 g_slist_free(hosts);
  66                 return;
  67         }
  68
  69         addr = g_slist_next(hosts)->data;
  70         if (addr->sa_family == AF_INET6) {
  71                 /* OS provides addr so it must be properly aligned */
  72                 struct sockaddr_in6 *sin6 = (void *) addr;
  73                 addrdata = &sin6->sin6_addr;
  74                 port = sin6->sin6_port;
  75         } else {
  76                 /* OS provides addr so it must be properly aligned */
  77                 struct sockaddr_in *sin = (void *) addr;
  78                 addrdata = &sin->sin_addr;
  79                 port = sin->sin_port;
  80         }
  81
  82         inet_ntop(addr->sa_family, addrdata, ipstr, sizeof (ipstr));
  83
  84         query->callback(query->extradata, ipstr, port);
  85
  86         for (; hosts; hosts = g_slist_delete_link(hosts, hosts)) {
  87                 // Free the addrlen, no data in this link
  88                 hosts = g_slist_delete_link(hosts, hosts);
  89                 // Free the address
  90                 g_free(hosts->data);
  91         }
  92
  93         g_free(query);
  94 }
  95
  96 struct sipe_dns_query *sipe_backend_dns_query_a(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
  97                                                 const gchar *hostname,
  98                                                 int port,
  99                                                 sipe_dns_resolved_cb callback,
 100                                                 gpointer data)
 101 {
 102         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 103 #if PURPLE_VERSION_CHECK(3,0,0)
 104         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 105 #endif
 106
 107         query->type = A;
 108         query->callback = callback;
 109         query->extradata = data;
 110         query->purple_query_data = purple_dnsquery_a(
 111 #if PURPLE_VERSION_CHECK(3,0,0)
 112                                                      purple_private->account,
 113 #endif
 114                                                      hostname,
 115                                                      port,
 116                                                      (PurpleDnsQueryConnectFunction) dns_a_response,
 117                                                      query);
 118
 119         return query;
 120 }
 121
 122
 123 static void dns_srv_response(PurpleSrvResponse *resp,
 124                              int results,
 125                              struct sipe_dns_query *query)
 126 {
 127         if (results)
 128                 query->callback(query->extradata, resp->hostname, resp->port);
 129         else
 130                 query->callback(query->extradata, NULL, 0);
 131
 132         g_free(query);
 133         g_free(resp);
 134 }
 135
 136 struct sipe_dns_query *sipe_backend_dns_query_srv(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
 137                                                   const gchar *protocol,
 138                                                   const gchar *transport,
 139                                                   const gchar *domain,
 140                                                   sipe_dns_resolved_cb callback,
 141                                                   gpointer data)
 142 {
 143         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 144 #if PURPLE_VERSION_CHECK(3,0,0)
 145         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 146 #endif
 147
 148         query->type = SRV;
 149         query->callback = callback;
 150         query->extradata = data;
 151         query->purple_query_data = purple_srv_resolve(
 152 #if PURPLE_VERSION_CHECK(3,0,0)
 153                                                       purple_private->account,
 154 #endif
 155                                                       protocol,
 156                                                       transport,
 157                                                       domain,
 158                                                       (PurpleSrvCallback) dns_srv_response,
 159                                                       query);
 160
 161         return query;
 162 }
 163
 164 void sipe_backend_dns_query_cancel(struct sipe_dns_query *query)
 165 {
 166         switch (query->type) {
 167                 case A:
 168                         purple_dnsquery_destroy(query->purple_query_data);
 169                         break;
 170                 case SRV:
 171 #if PURPLE_VERSION_CHECK(2,8,0) || PURPLE_VERSION_CHECK(3,0,0)
 172                         purple_srv_txt_query_destroy(query->purple_query_data);
 173 #else
 174                         purple_srv_cancel(query->purple_query_data);
 175 #endif
 176                         break;
 177         }
 178
 179         g_free(query);
 180 }
 181
 182 /*
 183   Local Variables:
 184   mode: c
 185   c-file-style: "bsd"
 186   indent-tabs-mode: t
 187   tab-width: 8
 188   End:
 189 */