src/miranda/miranda-dnsquery.c

   1 /**
   2  * @file miranda-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 #include <windows.h>
  24 #include <win2k.h>
  25 #include <stdio.h>
  26 #include <windns.h>
  27
  28 #include <glib.h>
  29
  30 #include "newpluginapi.h"
  31 #include "m_protosvc.h"
  32 #include "m_protoint.h"
  33 #include "m_utils.h"
  34
  35 #include "sipe-backend.h"
  36 #include "miranda-private.h"
  37
  38 typedef DNS_STATUS (WINAPI *DNSQUERYA)(IN PCSTR pszName, IN WORD wType, IN DWORD Options, IN PIP4_ARRAY aipServers OPTIONAL, IN OUT PDNS_RECORD *ppQueryResults OPTIONAL, IN OUT PVOID *pReserved OPTIONAL);
  39 typedef void (WINAPI *DNSFREELIST)(IN OUT PDNS_RECORD pRecordList, IN DNS_FREE_TYPE FreeType);
  40
  41 typedef struct srv_reply_t {
  42         char *host;
  43         int port;
  44 } srv_reply;
  45
  46 static srv_reply* srv_lookup(WORD wType,
  47                              const gchar* service,
  48                              const gchar* protocol,
  49                              const gchar* domain )
  50 {
  51         srv_reply *res = NULL;
  52         HINSTANCE hDnsapi = LoadLibraryA( "dnsapi.dll" );
  53         DNSQUERYA pDnsQuery;
  54         DNSFREELIST pDnsRecordListFree;
  55         gchar temp[256];
  56         DNS_RECORD *results = NULL;
  57         DNS_STATUS status;
  58
  59         if ( hDnsapi == NULL )
  60                 return res;
  61
  62         pDnsQuery = (DNSQUERYA)GetProcAddress(hDnsapi, "DnsQuery_A");
  63         pDnsRecordListFree = (DNSFREELIST)GetProcAddress(hDnsapi, "DnsRecordListFree");
  64         if ( pDnsQuery == NULL ) {
  65                 //dnsapi.dll is not the needed dnsapi ;)
  66                 FreeLibrary( hDnsapi );
  67                 return res;
  68         }
  69
  70         mir_snprintf( temp, SIZEOF(temp), "_%s._%s.%s", service, protocol, domain );
  71
  72         status = pDnsQuery(temp, DNS_TYPE_SRV, DNS_QUERY_STANDARD, NULL, &results, NULL);
  73         if (FAILED(status)||!results || results[0].Data.Srv.pNameTarget == 0||results[0].wType != DNS_TYPE_SRV) {
  74                 FreeLibrary(hDnsapi);
  75                 return res;
  76         }
  77
  78         res = g_new0(srv_reply,1);
  79         res->host = g_strdup((const gchar*)results[0].Data.Srv.pNameTarget);
  80         res->port = (int)results[0].Data.Srv.wPort;
  81
  82         pDnsRecordListFree(results, DnsFreeRecordList);
  83         FreeLibrary(hDnsapi);
  84         return res;
  85 }
  86
  87
  88 struct sipe_dns_query *sipe_backend_dns_query_a(struct sipe_core_public *sipe_public,
  89                                                 const gchar *hostname,
  90                                                 guint port,
  91                                                 sipe_dns_resolved_cb callback,
  92                                                 gpointer data)
  93 {
  94         srv_reply* sr = srv_lookup( DNS_TYPE_A, "protocol", "transport", "domain" );
  95         SIPE_DEBUG_INFO("Type A lookup for host <%s> port <%d>", hostname, port);
  96
  97         if (sr) {
  98                 callback( data, sr->host, sr->port);
  99
 100                 g_free(sr->host);
 101                 g_free(sr);
 102         } else {
 103                 callback( data, NULL, 0);
 104         }
 105
 106         return NULL;
 107 }
 108
 109 struct sipe_dns_query *sipe_backend_dns_query_srv(struct sipe_core_public *sipe_public,
 110                                                   const gchar *protocol,
 111                                                   const gchar *transport,
 112                                                   const gchar *domain,
 113                                                   sipe_dns_resolved_cb callback,
 114                                                   gpointer data)
 115 {
 116         srv_reply* sr = srv_lookup( DNS_TYPE_SRV, protocol, transport, domain );
 117
 118         SIPE_DEBUG_INFO("Type SRV lookup for proto <%s> transport <%s> domain <%s>",
 119                         protocol, transport, domain);
 120
 121         if (sr) {
 122                 callback( data, sr->host, sr->port);
 123
 124                 g_free(sr->host);
 125                 g_free(sr);
 126         } else {
 127                 callback( data, NULL, 0);
 128         }
 129
 130         return NULL;
 131 }
 132
 133 void sipe_backend_dns_query_cancel(struct sipe_dns_query *query)
 134 {
 135         _NIF();
 136 }
 137
 138 /*
 139   Local Variables:
 140   mode: c
 141   c-file-style: "bsd"
 142   indent-tabs-mode: t
 143   tab-width: 8
 144   End:
 145 */