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 <arpa/inet.h>
  29 #include <netinet/in.h>
  30 #include <sys/socket.h>
  31 #endif
  32
  33 #include <glib.h>
  34
  35 #include "dnsquery.h"
  36 #include "dnssrv.h"
  37 #include "version.h"
  38
  39 #include "sipe-common.h"
  40 #include "sipe-backend.h"
  41 #include "sipe-core.h"
  42
  43 #include "purple-private.h"
  44
  45 struct sipe_dns_query {
  46         enum {
  47                 A,
  48                 SRV
  49         } type;
  50         sipe_dns_resolved_cb  callback;
  51         gpointer              extradata;
  52         gpointer              purple_query_data;
  53 };
  54
  55 static void dns_a_response(GSList *hosts,
  56                            struct sipe_dns_query *query,
  57                            const char *error_message)
  58 {
  59         char ipstr[INET6_ADDRSTRLEN];
  60         struct sockaddr *addr;
  61         const void *addrdata;
  62         int port;
  63
  64         if (error_message || !g_slist_next(hosts)) {
  65                 query->callback(query->extradata, NULL, 0);
  66                 g_slist_free(hosts);
  67                 return;
  68         }
  69
  70         addr = g_slist_next(hosts)->data;
  71         if (addr->sa_family == AF_INET6) {
  72                 /* OS provides addr so it must be properly aligned */
  73                 struct sockaddr_in6 *sin6 = (void *) addr;
  74                 addrdata = &sin6->sin6_addr;
  75                 port = sin6->sin6_port;
  76         } else {
  77                 /* OS provides addr so it must be properly aligned */
  78                 struct sockaddr_in *sin = (void *) addr;
  79                 addrdata = &sin->sin_addr;
  80                 port = sin->sin_port;
  81         }
  82
  83         inet_ntop(addr->sa_family, addrdata, ipstr, sizeof (ipstr));
  84
  85         query->callback(query->extradata, ipstr, port);
  86
  87         for (; hosts; hosts = g_slist_delete_link(hosts, hosts)) {
  88                 // Free the addrlen, no data in this link
  89                 hosts = g_slist_delete_link(hosts, hosts);
  90                 // Free the address
  91                 g_free(hosts->data);
  92         }
  93
  94         g_free(query);
  95 }
  96
  97 struct sipe_dns_query *sipe_backend_dns_query_a(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
  98                                                 const gchar *hostname,
  99                                                 int port,
 100                                                 sipe_dns_resolved_cb callback,
 101                                                 gpointer data)
 102 {
 103         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 104 #if PURPLE_VERSION_CHECK(3,0,0)
 105         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 106 #endif
 107
 108         query->type = A;
 109         query->callback = callback;
 110         query->extradata = data;
 111         query->purple_query_data = purple_dnsquery_a(
 112 #if PURPLE_VERSION_CHECK(3,0,0)
 113                                                      purple_private->account,
 114 #endif
 115                                                      hostname,
 116                                                      port,
 117                                                      (PurpleDnsQueryConnectFunction) dns_a_response,
 118                                                      query);
 119
 120         return query;
 121 }
 122
 123
 124 static void dns_srv_response(PurpleSrvResponse *resp,
 125                              int results,
 126                              struct sipe_dns_query *query)
 127 {
 128         if (results)
 129                 query->callback(query->extradata, resp->hostname, resp->port);
 130         else
 131                 query->callback(query->extradata, NULL, 0);
 132
 133         g_free(query);
 134         g_free(resp);
 135 }
 136
 137 struct sipe_dns_query *sipe_backend_dns_query_srv(SIPE_UNUSED_PARAMETER struct sipe_core_public *sipe_public,
 138                                                   const gchar *protocol,
 139                                                   const gchar *transport,
 140                                                   const gchar *domain,
 141                                                   sipe_dns_resolved_cb callback,
 142                                                   gpointer data)
 143 {
 144         struct sipe_dns_query *query = g_new(struct sipe_dns_query, 1);
 145 #if PURPLE_VERSION_CHECK(3,0,0)
 146         struct sipe_backend_private *purple_private = sipe_public->backend_private;
 147 #endif
 148
 149         query->type = SRV;
 150         query->callback = callback;
 151         query->extradata = data;
 152         query->purple_query_data = purple_srv_resolve(
 153 #if PURPLE_VERSION_CHECK(3,0,0)
 154                                                       purple_private->account,
 155 #endif
 156                                                       protocol,
 157                                                       transport,
 158                                                       domain,
 159                                                       (PurpleSrvCallback) dns_srv_response,
 160                                                       query);
 161
 162         return query;
 163 }
 164
 165 void sipe_backend_dns_query_cancel(struct sipe_dns_query *query)
 166 {
 167         switch (query->type) {
 168                 case A:
 169                         purple_dnsquery_destroy(query->purple_query_data);
 170                         break;
 171                 case SRV:
 172 #if PURPLE_VERSION_CHECK(2,8,0) || PURPLE_VERSION_CHECK(3,0,0)
 173                         purple_srv_txt_query_destroy(query->purple_query_data);
 174 #else
 175                         purple_srv_cancel(query->purple_query_data);
 176 #endif
 177                         break;
 178         }
 179
 180         g_free(query);
 181 }
 182
 183 /*
 184   Local Variables:
 185   mode: c
 186   c-file-style: "bsd"
 187   indent-tabs-mode: t
 188   tab-width: 8
 189   End:
 190 */