dlls/dnsapi/query.c

   1 /*
   2  * DNS support
   3  *
   4  * Copyright (C) 2006 Hans Leidekker
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winerror.h"
  25 #include "winnls.h"
  26 #include "windns.h"
  27 #include "nb30.h"
  28 #include "ws2def.h"
  29
  30 #include "wine/debug.h"
  31 #include "dnsapi.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
  34
  35 #define DEFAULT_TTL  1200
  36
  37 static DNS_STATUS do_query_netbios( PCSTR name, DNS_RECORDA **recp )
  38 {
  39     NCB ncb;
  40     UCHAR ret;
  41     DNS_RRSET rrset;
  42     FIND_NAME_BUFFER *buffer;
  43     FIND_NAME_HEADER *header;
  44     DNS_RECORDA *record = NULL;
  45     unsigned int i, len;
  46     DNS_STATUS status = ERROR_INVALID_NAME;
  47
  48     len = strlen( name );
  49     if (len >= NCBNAMSZ) return DNS_ERROR_RCODE_NAME_ERROR;
  50
  51     DNS_RRSET_INIT( rrset );
  52
  53     memset( &ncb, 0, sizeof(ncb) );
  54     ncb.ncb_command = NCBFINDNAME;
  55
  56     memset( ncb.ncb_callname, ' ', sizeof(ncb.ncb_callname) );
  57     memcpy( ncb.ncb_callname, name, len );
  58     ncb.ncb_callname[NCBNAMSZ - 1] = '\0';
  59
  60     ret = Netbios( &ncb );
  61     if (ret != NRC_GOODRET) return ERROR_INVALID_NAME;
  62
  63     header = (FIND_NAME_HEADER *)ncb.ncb_buffer;
  64     buffer = (FIND_NAME_BUFFER *)((char *)header + sizeof(FIND_NAME_HEADER));
  65
  66     for (i = 0; i < header->node_count; i++)
  67     {
  68         record = calloc( 1, sizeof(DNS_RECORDA) );
  69         if (!record)
  70         {
  71             status = ERROR_NOT_ENOUGH_MEMORY;
  72             goto exit;
  73         }
  74         else
  75         {
  76             record->pName = strdup( name );
  77             if (!record->pName)
  78             {
  79                 status = ERROR_NOT_ENOUGH_MEMORY;
  80                 goto exit;
  81             }
  82
  83             record->wType = DNS_TYPE_A;
  84             record->Flags.S.Section = DnsSectionAnswer;
  85             record->Flags.S.CharSet = DnsCharSetUtf8;
  86             record->dwTtl = DEFAULT_TTL;
  87
  88             /* FIXME: network byte order? */
  89             record->Data.A.IpAddress = *(DWORD *)((char *)buffer[i].destination_addr + 2);
  90
  91             DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
  92         }
  93     }
  94     status = ERROR_SUCCESS;
  95
  96 exit:
  97     DNS_RRSET_TERMINATE( rrset );
  98
  99     if (status != ERROR_SUCCESS)
 100         DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
 101     else
 102         *recp = (DNS_RECORDA *)rrset.pFirstRR;
 103
 104     return status;
 105 }
 106
 107 static const char *debugstr_query_request(const DNS_QUERY_REQUEST *req)
 108 {
 109     if (!req) return "(null)";
 110     return wine_dbg_sprintf("{%lu %s %s %I64x %p %lu %p %p}", req->Version,
 111             debugstr_w(req->QueryName), debugstr_type(req->QueryType),
 112             req->QueryOptions, req->pDnsServerList, req->InterfaceIndex,
 113             req->pQueryCompletionCallback, req->pQueryContext);
 114 }
 115
 116 /******************************************************************************
 117  * DnsQueryEx           [DNSAPI.@]
 118  *
 119  */
 120 DNS_STATUS WINAPI DnsQueryEx(DNS_QUERY_REQUEST *request, DNS_QUERY_RESULT *result, DNS_QUERY_CANCEL *cancel)
 121 {
 122     FIXME("(%s, %p, %p)\n", debugstr_query_request(request), result, cancel);
 123     return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
 124 }
 125
 126 /******************************************************************************
 127  * DnsQuery_A           [DNSAPI.@]
 128  *
 129  */
 130 DNS_STATUS WINAPI DnsQuery_A( const char *name, WORD type, DWORD options, void *servers, DNS_RECORDA **result,
 131                               void **reserved )
 132 {
 133     WCHAR *nameW;
 134     DNS_RECORDW *resultW;
 135     DNS_STATUS status;
 136
 137     TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_a(name), debugstr_type( type ),
 138            options, servers, result, reserved );
 139
 140     if (!name || !result)
 141         return ERROR_INVALID_PARAMETER;
 142
 143     nameW = strdup_aw( name );
 144     if (!nameW) return ERROR_NOT_ENOUGH_MEMORY;
 145
 146     status = DnsQuery_W( nameW, type, options, servers, &resultW, reserved );
 147
 148     if (status == ERROR_SUCCESS)
 149     {
 150         *result = (DNS_RECORDA *)DnsRecordSetCopyEx(
 151              (DNS_RECORD *)resultW, DnsCharSetUnicode, DnsCharSetAnsi );
 152
 153         if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
 154         DnsRecordListFree( (DNS_RECORD *)resultW, DnsFreeRecordList );
 155     }
 156
 157     free( nameW );
 158     return status;
 159 }
 160
 161 /******************************************************************************
 162  * DnsQuery_UTF8              [DNSAPI.@]
 163  *
 164  */
 165 DNS_STATUS WINAPI DnsQuery_UTF8( const char *name, WORD type, DWORD options, void *servers, DNS_RECORDA **result,
 166                                  void **reserved )
 167 {
 168     DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
 169     unsigned char answer[4096];
 170     DWORD len = sizeof(answer);
 171     struct query_params query_params = { name, type, options, answer, &len };
 172
 173     TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_a(name), debugstr_type( type ),
 174            options, servers, result, reserved );
 175
 176     if (!name || !result)
 177         return ERROR_INVALID_PARAMETER;
 178
 179     if ((ret = RESOLV_CALL( set_serverlist, servers ))) return ret;
 180
 181     ret = RESOLV_CALL( query, &query_params );
 182     if (!ret)
 183     {
 184         DNS_MESSAGE_BUFFER *buffer = (DNS_MESSAGE_BUFFER *)answer;
 185
 186         if (len < sizeof(buffer->MessageHead)) return DNS_ERROR_BAD_PACKET;
 187         DNS_BYTE_FLIP_HEADER_COUNTS( &buffer->MessageHead );
 188         switch (buffer->MessageHead.ResponseCode)
 189         {
 190         case DNS_RCODE_NOERROR:  ret = DnsExtractRecordsFromMessage_UTF8( buffer, len, result ); break;
 191         case DNS_RCODE_FORMERR:  ret = DNS_ERROR_RCODE_FORMAT_ERROR; break;
 192         case DNS_RCODE_SERVFAIL: ret = DNS_ERROR_RCODE_SERVER_FAILURE; break;
 193         case DNS_RCODE_NXDOMAIN: ret = DNS_ERROR_RCODE_NAME_ERROR; break;
 194         case DNS_RCODE_NOTIMPL:  ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED; break;
 195         case DNS_RCODE_REFUSED:  ret = DNS_ERROR_RCODE_REFUSED; break;
 196         case DNS_RCODE_YXDOMAIN: ret = DNS_ERROR_RCODE_YXDOMAIN; break;
 197         case DNS_RCODE_YXRRSET:  ret = DNS_ERROR_RCODE_YXRRSET; break;
 198         case DNS_RCODE_NXRRSET:  ret = DNS_ERROR_RCODE_NXRRSET; break;
 199         case DNS_RCODE_NOTAUTH:  ret = DNS_ERROR_RCODE_NOTAUTH; break;
 200         case DNS_RCODE_NOTZONE:  ret = DNS_ERROR_RCODE_NOTZONE; break;
 201         default:                 ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED; break;
 202         }
 203     }
 204
 205     if (ret == DNS_ERROR_RCODE_NAME_ERROR && type == DNS_TYPE_A &&
 206         !(options & DNS_QUERY_NO_NETBT))
 207     {
 208         TRACE( "dns lookup failed, trying netbios query\n" );
 209         ret = do_query_netbios( name, result );
 210     }
 211
 212     return ret;
 213 }
 214
 215 /******************************************************************************
 216  * DnsQuery_W              [DNSAPI.@]
 217  *
 218  */
 219 DNS_STATUS WINAPI DnsQuery_W( const WCHAR *name, WORD type, DWORD options, void *servers, DNS_RECORDW **result,
 220                               void **reserved )
 221 {
 222     char *nameU;
 223     DNS_RECORDA *resultA;
 224     DNS_STATUS status;
 225
 226     TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_w(name), debugstr_type( type ),
 227            options, servers, result, reserved );
 228
 229     if (!name || !result)
 230         return ERROR_INVALID_PARAMETER;
 231
 232     nameU = strdup_wu( name );
 233     if (!nameU) return ERROR_NOT_ENOUGH_MEMORY;
 234
 235     status = DnsQuery_UTF8( nameU, type, options, servers, &resultA, reserved );
 236
 237     if (status == ERROR_SUCCESS)
 238     {
 239         *result = (DNS_RECORDW *)DnsRecordSetCopyEx(
 240             (DNS_RECORD *)resultA, DnsCharSetUtf8, DnsCharSetUnicode );
 241
 242         if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
 243         DnsRecordListFree( (DNS_RECORD *)resultA, DnsFreeRecordList );
 244     }
 245
 246     free( nameU );
 247     return status;
 248 }
 249
 250 static DNS_STATUS get_hostname_a( COMPUTER_NAME_FORMAT format, PSTR buffer, PDWORD len )
 251 {
 252     char name[256];
 253     DWORD size = ARRAY_SIZE(name);
 254
 255     if (!GetComputerNameExA( format, name, &size ))
 256         return DNS_ERROR_NAME_DOES_NOT_EXIST;
 257
 258     if (!buffer || (size = lstrlenA( name ) + 1) > *len)
 259     {
 260         *len = size;
 261         return ERROR_INSUFFICIENT_BUFFER;
 262     }
 263
 264     lstrcpyA( buffer, name );
 265     return ERROR_SUCCESS;
 266 }
 267
 268 static DNS_STATUS get_hostname_w( COMPUTER_NAME_FORMAT format, PWSTR buffer, PDWORD len )
 269 {
 270     WCHAR name[256];
 271     DWORD size = ARRAY_SIZE(name);
 272
 273     if (!GetComputerNameExW( format, name, &size ))
 274         return DNS_ERROR_NAME_DOES_NOT_EXIST;
 275
 276     if (!buffer || (size = lstrlenW( name ) + 1) > *len)
 277     {
 278         *len = size;
 279         return ERROR_INSUFFICIENT_BUFFER;
 280     }
 281
 282     lstrcpyW( buffer, name );
 283     return ERROR_SUCCESS;
 284 }
 285
 286 static DNS_STATUS get_dns_server_list( IP4_ARRAY *out, DWORD *len )
 287 {
 288     char buf[FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[3])];
 289     DNS_ADDR_ARRAY *servers = (DNS_ADDR_ARRAY *)buf;
 290     DWORD ret, needed, i, num, array_len = sizeof(buf);
 291     struct get_serverlist_params params = { AF_INET, servers, &array_len };
 292     for (;;)
 293     {
 294         ret = RESOLV_CALL( get_serverlist, &params );
 295         if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA) goto err;
 296         num = (array_len - FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[0])) / sizeof(DNS_ADDR);
 297         needed = FIELD_OFFSET(IP4_ARRAY, AddrArray[num]);
 298         if (!out || *len < needed)
 299         {
 300             *len = needed;
 301             ret = !out ? ERROR_SUCCESS : ERROR_MORE_DATA;
 302             goto err;
 303         }
 304         if (!ret) break;
 305
 306         if ((char *)servers != buf) free( servers );
 307         servers = malloc( array_len );
 308         if (!servers)
 309         {
 310             ret = ERROR_NOT_ENOUGH_MEMORY;
 311             goto err;
 312         }
 313     }
 314
 315     out->AddrCount = num;
 316     for (i = 0; i < num; i++)
 317         out->AddrArray[i] = ((SOCKADDR_IN *)servers->AddrArray[i].MaxSa)->sin_addr.s_addr;
 318     *len = needed;
 319     ret = ERROR_SUCCESS;
 320
 321 err:
 322     if ((char *)servers != buf) free( servers );
 323     return ret;
 324 }
 325
 326 /******************************************************************************
 327  * DnsQueryConfig          [DNSAPI.@]
 328  *
 329  */
 330 DNS_STATUS WINAPI DnsQueryConfig( DNS_CONFIG_TYPE config, DWORD flag, const WCHAR *adapter, void *reserved,
 331                                   void *buffer, DWORD *len )
 332 {
 333     DNS_STATUS ret = ERROR_INVALID_PARAMETER;
 334
 335     TRACE( "(%d, %#lx, %s, %p, %p, %p)\n", config, flag, debugstr_w(adapter), reserved, buffer, len );
 336
 337     if (!len) return ERROR_INVALID_PARAMETER;
 338
 339     switch (config)
 340     {
 341     case DnsConfigDnsServerList:
 342         return get_dns_server_list( buffer, len );
 343
 344     case DnsConfigHostName_A:
 345     case DnsConfigHostName_UTF8:
 346         return get_hostname_a( ComputerNameDnsHostname, buffer, len );
 347
 348     case DnsConfigFullHostName_A:
 349     case DnsConfigFullHostName_UTF8:
 350         return get_hostname_a( ComputerNameDnsFullyQualified, buffer, len );
 351
 352     case DnsConfigPrimaryDomainName_A:
 353     case DnsConfigPrimaryDomainName_UTF8:
 354         return get_hostname_a( ComputerNameDnsDomain, buffer, len );
 355
 356     case DnsConfigHostName_W:
 357         return get_hostname_w( ComputerNameDnsHostname, buffer, len );
 358
 359     case DnsConfigFullHostName_W:
 360         return get_hostname_w( ComputerNameDnsFullyQualified, buffer, len );
 361
 362     case DnsConfigPrimaryDomainName_W:
 363         return get_hostname_w( ComputerNameDnsDomain, buffer, len );
 364
 365     case DnsConfigAdapterDomainName_A:
 366     case DnsConfigAdapterDomainName_W:
 367     case DnsConfigAdapterDomainName_UTF8:
 368     case DnsConfigAdapterInfo:
 369     case DnsConfigPrimaryHostNameRegistrationEnabled:
 370     case DnsConfigAdapterHostNameRegistrationEnabled:
 371     case DnsConfigAddressRegistrationMaxCount:
 372         FIXME( "unimplemented config type %d\n", config );
 373         break;
 374
 375     case DnsConfigDnsServersUnspec:
 376     {
 377         struct get_serverlist_params params = { AF_UNSPEC, buffer, len };
 378         return RESOLV_CALL( get_serverlist, &params );
 379     }
 380     case DnsConfigDnsServersIpv4:
 381     {
 382         struct get_serverlist_params params = { AF_INET, buffer, len };
 383         return RESOLV_CALL( get_serverlist, &params );
 384     }
 385     case DnsConfigDnsServersIpv6:
 386     {
 387         struct get_serverlist_params params = { AF_INET6, buffer, len };
 388         return RESOLV_CALL( get_serverlist, &params );
 389     }
 390     /* Windows does not implement this, but we need it in iphlpapi. */
 391     case DnsConfigSearchList:
 392     {
 393         struct get_searchlist_params params = { buffer, len };
 394         return RESOLV_CALL( get_searchlist, &params );
 395     }
 396     default:
 397         WARN( "unknown config type: %d\n", config );
 398         break;
 399     }
 400     return ret;
 401 }