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Release 1.1.37.
[wine/gsoc-2012-control.git] / dlls / dnsapi / query.c
blob75e2e33a14ea13073e1ed49c25c471598917e8bc
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 "config.h"
22 #include "wine/port.h"
23 #include "wine/debug.h"
24
25 #include <stdarg.h>
26 #include <string.h>
27 #include <sys/types.h>
28
29 #ifdef HAVE_NETINET_IN_H
30 # include <netinet/in.h>
31 #endif
32 #ifdef HAVE_ARPA_NAMESER_H
33 # include <arpa/nameser.h>
34 #endif
35 #ifdef HAVE_RESOLV_H
36 # include <resolv.h>
37 #endif
38 #ifdef HAVE_NETDB_H
39 # include <netdb.h>
40 #endif
41
42 #include "windef.h"
43 #include "winbase.h"
44 #include "winerror.h"
45 #include "winnls.h"
46 #include "windns.h"
47 #include "nb30.h"
48
49 #include "dnsapi.h"
50
51 WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
52
53 #ifdef HAVE_RESOLV
54
55 static CRITICAL_SECTION resolver_cs;
56 static CRITICAL_SECTION_DEBUG resolver_cs_debug =
57 {
58 0, 0, &resolver_cs,
59 { &resolver_cs_debug.ProcessLocksList,
60 &resolver_cs_debug.ProcessLocksList },
61 0, 0, { (DWORD_PTR)(__FILE__ ": resolver_cs") }
62 };
63 static CRITICAL_SECTION resolver_cs = { &resolver_cs_debug, -1, 0, 0, 0, 0 };
64
65 #define LOCK_RESOLVER() do { EnterCriticalSection( &resolver_cs ); } while (0)
66 #define UNLOCK_RESOLVER() do { LeaveCriticalSection( &resolver_cs ); } while (0)
67
68 static int resolver_initialised;
69
70 /* call res_init() just once because of a bug in Mac OS X 10.4 */
71 static void initialise_resolver( void )
72 {
73 if (!resolver_initialised)
74 {
75 res_init();
76 resolver_initialised = 1;
77 }
78 }
79
80 static const char *dns_section_to_str( ns_sect section )
81 {
82 switch (section)
83 {
84 case ns_s_qd: return "Question";
85 case ns_s_an: return "Answer";
86 case ns_s_ns: return "Authority";
87 case ns_s_ar: return "Additional";
88 default:
89 {
90 static char tmp[5];
91 FIXME( "unknown section: 0x%02x\n", section );
92 sprintf( tmp, "0x%02x", section );
93 return tmp;
94 }
95 }
96 }
97
98 static unsigned long dns_map_options( DWORD options )
99 {
100 unsigned long ret = 0;
101
102 if (options == DNS_QUERY_STANDARD)
103 return RES_DEFAULT;
104
105 if (options & DNS_QUERY_ACCEPT_TRUNCATED_RESPONSE)
106 ret |= RES_IGNTC;
107 if (options & DNS_QUERY_USE_TCP_ONLY)
108 ret |= RES_USEVC;
109 if (options & DNS_QUERY_NO_RECURSION)
110 ret &= ~RES_RECURSE;
111 if (options & DNS_QUERY_NO_LOCAL_NAME)
112 ret &= ~RES_DNSRCH;
113 if (options & DNS_QUERY_NO_HOSTS_FILE)
114 ret |= RES_NOALIASES;
115 if (options & DNS_QUERY_TREAT_AS_FQDN)
116 ret &= ~RES_DEFNAMES;
117
118 if (options & DNS_QUERY_DONT_RESET_TTL_VALUES)
119 FIXME( "option DNS_QUERY_DONT_RESET_TTL_VALUES not implemented\n" );
120 if (options & DNS_QUERY_RESERVED)
121 FIXME( "option DNS_QUERY_RESERVED not implemented\n" );
122 if (options & DNS_QUERY_WIRE_ONLY)
123 FIXME( "option DNS_QUERY_WIRE_ONLY not implemented\n" );
124 if (options & DNS_QUERY_NO_WIRE_QUERY)
125 FIXME( "option DNS_QUERY_NO_WIRE_QUERY not implemented\n" );
126 if (options & DNS_QUERY_BYPASS_CACHE)
127 FIXME( "option DNS_QUERY_BYPASS_CACHE not implemented\n" );
128 if (options & DNS_QUERY_RETURN_MESSAGE)
129 FIXME( "option DNS_QUERY_RETURN_MESSAGE not implemented\n" );
130
131 if (options & DNS_QUERY_NO_NETBT)
132 TRACE( "netbios query disabled\n" );
133
134 return ret;
135 }
136
137 static DNS_STATUS dns_map_error( int error )
138 {
139 switch (error)
140 {
141 case ns_r_noerror: return ERROR_SUCCESS;
142 case ns_r_formerr: return DNS_ERROR_RCODE_FORMAT_ERROR;
143 case ns_r_servfail: return DNS_ERROR_RCODE_SERVER_FAILURE;
144 case ns_r_nxdomain: return DNS_ERROR_RCODE_NAME_ERROR;
145 case ns_r_notimpl: return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
146 case ns_r_refused: return DNS_ERROR_RCODE_REFUSED;
147 case ns_r_yxdomain: return DNS_ERROR_RCODE_YXDOMAIN;
148 case ns_r_yxrrset: return DNS_ERROR_RCODE_YXRRSET;
149 case ns_r_nxrrset: return DNS_ERROR_RCODE_NXRRSET;
150 case ns_r_notauth: return DNS_ERROR_RCODE_NOTAUTH;
151 case ns_r_notzone: return DNS_ERROR_RCODE_NOTZONE;
152 default:
153 FIXME( "unmapped error code: %d\n", error );
154 return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
155 }
156 }
157
158 static DNS_STATUS dns_map_h_errno( int error )
159 {
160 switch (error)
161 {
162 case NO_DATA:
163 case HOST_NOT_FOUND: return DNS_ERROR_RCODE_NAME_ERROR;
164 case TRY_AGAIN: return DNS_ERROR_RCODE_SERVER_FAILURE;
165 case NO_RECOVERY: return DNS_ERROR_RCODE_REFUSED;
166 case NETDB_INTERNAL: return DNS_ERROR_RCODE;
167 default:
168 FIXME( "unmapped error code: %d\n", error );
169 return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
170 }
171 }
172
173 static char *dns_dname_from_msg( ns_msg msg, const unsigned char *pos )
174 {
175 int len;
176 char *str, dname[NS_MAXDNAME] = ".";
177
178 /* returns *compressed* length, ignore it */
179 len = dns_ns_name_uncompress( ns_msg_base( msg ), ns_msg_end( msg ),
180 pos, dname, sizeof(dname) );
181
182 len = strlen( dname );
183 str = heap_alloc( len + 1 );
184 if (str) strcpy( str, dname );
185 return str;
186 }
187
188 static char *dns_str_from_rdata( const unsigned char *rdata )
189 {
190 char *str;
191 unsigned int len = rdata[0];
192
193 str = heap_alloc( len + 1 );
194 if (str)
195 {
196 memcpy( str, ++rdata, len );
197 str[len] = '\0';
198 }
199 return str;
200 }
201
202 static unsigned int dns_get_record_size( const ns_rr *rr )
203 {
204 const unsigned char *pos = rr->rdata;
205 unsigned int num = 0, size = sizeof(DNS_RECORDA);
206
207 switch (rr->type)
208 {
209 case ns_t_key:
210 {
211 pos += sizeof(WORD) + sizeof(BYTE) + sizeof(BYTE);
212 size += rr->rdata + rr->rdlength - pos - 1;
213 break;
214 }
215 case ns_t_sig:
216 {
217 pos += sizeof(PCHAR) + sizeof(WORD) + 2 * sizeof(BYTE);
218 pos += 3 * sizeof(DWORD) + 2 * sizeof(WORD);
219 size += rr->rdata + rr->rdlength - pos - 1;
220 break;
221 }
222 case ns_t_hinfo:
223 case ns_t_isdn:
224 case ns_t_txt:
225 case ns_t_x25:
226 {
227 while (pos[0] && pos < rr->rdata + rr->rdlength)
228 {
229 num++;
230 pos += pos[0] + 1;
231 }
232 size += (num - 1) * sizeof(PCHAR);
233 break;
234 }
235 case ns_t_null:
236 {
237 size += rr->rdlength - 1;
238 break;
239 }
240 case ns_t_nxt:
241 case ns_t_wks:
242 case 0xff01: /* WINS */
243 {
244 FIXME( "unhandled type: %s\n", dns_type_to_str( rr->type ) );
245 break;
246 }
247 default:
248 break;
249 }
250 return size;
251 }
252
253 static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, WORD *dlen )
254 {
255 DNS_STATUS ret = ERROR_SUCCESS;
256 const unsigned char *pos = rr->rdata;
257 unsigned int i, size;
258
259 switch (rr->type)
260 {
261 case ns_t_a:
262 {
263 r->Data.A.IpAddress = *(const DWORD *)pos;
264 *dlen = sizeof(DNS_A_DATA);
265 break;
266 }
267 case ns_t_aaaa:
268 {
269 for (i = 0; i < sizeof(IP6_ADDRESS)/sizeof(DWORD); i++)
270 {
271 r->Data.AAAA.Ip6Address.IP6Dword[i] = *(const DWORD *)pos;
272 pos += sizeof(DWORD);
273 }
274
275 *dlen = sizeof(DNS_AAAA_DATA);
276 break;
277 }
278 case ns_t_key:
279 {
280 /* FIXME: byte order? */
281 r->Data.KEY.wFlags = *(const WORD *)pos; pos += sizeof(WORD);
282 r->Data.KEY.chProtocol = *pos++;
283 r->Data.KEY.chAlgorithm = *pos++;
284
285 size = rr->rdata + rr->rdlength - pos;
286
287 for (i = 0; i < size; i++)
288 r->Data.KEY.Key[i] = *pos++;
289
290 *dlen = sizeof(DNS_KEY_DATA) + (size - 1) * sizeof(BYTE);
291 break;
292 }
293 case ns_t_rp:
294 case ns_t_minfo:
295 {
296 r->Data.MINFO.pNameMailbox = dns_dname_from_msg( msg, pos );
297 if (!r->Data.MINFO.pNameMailbox) return ERROR_NOT_ENOUGH_MEMORY;
298
299 if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
300 return DNS_ERROR_BAD_PACKET;
301
302 r->Data.MINFO.pNameErrorsMailbox = dns_dname_from_msg( msg, pos );
303 if (!r->Data.MINFO.pNameErrorsMailbox)
304 {
305 heap_free( r->Data.MINFO.pNameMailbox );
306 return ERROR_NOT_ENOUGH_MEMORY;
307 }
308
309 *dlen = sizeof(DNS_MINFO_DATAA);
310 break;
311 }
312 case ns_t_afsdb:
313 case ns_t_rt:
314 case ns_t_mx:
315 {
316 r->Data.MX.wPreference = ntohs( *(const WORD *)pos );
317 r->Data.MX.pNameExchange = dns_dname_from_msg( msg, pos + sizeof(WORD) );
318 if (!r->Data.MX.pNameExchange) return ERROR_NOT_ENOUGH_MEMORY;
319
320 *dlen = sizeof(DNS_MX_DATAA);
321 break;
322 }
323 case ns_t_null:
324 {
325 r->Data.Null.dwByteCount = rr->rdlength;
326 memcpy( r->Data.Null.Data, rr->rdata, rr->rdlength );
327
328 *dlen = sizeof(DNS_NULL_DATA) + rr->rdlength - 1;
329 break;
330 }
331 case ns_t_cname:
332 case ns_t_ns:
333 case ns_t_mb:
334 case ns_t_md:
335 case ns_t_mf:
336 case ns_t_mg:
337 case ns_t_mr:
338 case ns_t_ptr:
339 {
340 r->Data.PTR.pNameHost = dns_dname_from_msg( msg, pos );
341 if (!r->Data.PTR.pNameHost) return ERROR_NOT_ENOUGH_MEMORY;
342
343 *dlen = sizeof(DNS_PTR_DATAA);
344 break;
345 }
346 case ns_t_sig:
347 {
348 r->Data.SIG.pNameSigner = dns_dname_from_msg( msg, pos );
349 if (!r->Data.SIG.pNameSigner) return ERROR_NOT_ENOUGH_MEMORY;
350
351 if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
352 return DNS_ERROR_BAD_PACKET;
353
354 /* FIXME: byte order? */
355 r->Data.SIG.wTypeCovered = *(const WORD *)pos; pos += sizeof(WORD);
356 r->Data.SIG.chAlgorithm = *pos++;
357 r->Data.SIG.chLabelCount = *pos++;
358 r->Data.SIG.dwOriginalTtl = *(const DWORD *)pos; pos += sizeof(DWORD);
359 r->Data.SIG.dwExpiration = *(const DWORD *)pos; pos += sizeof(DWORD);
360 r->Data.SIG.dwTimeSigned = *(const DWORD *)pos; pos += sizeof(DWORD);
361 r->Data.SIG.wKeyTag = *(const WORD *)pos;
362
363 size = rr->rdata + rr->rdlength - pos;
364
365 for (i = 0; i < size; i++)
366 r->Data.SIG.Signature[i] = *pos++;
367
368 *dlen = sizeof(DNS_SIG_DATAA) + (size - 1) * sizeof(BYTE);
369 break;
370 }
371 case ns_t_soa:
372 {
373 r->Data.SOA.pNamePrimaryServer = dns_dname_from_msg( msg, pos );
374 if (!r->Data.SOA.pNamePrimaryServer) return ERROR_NOT_ENOUGH_MEMORY;
375
376 if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
377 return DNS_ERROR_BAD_PACKET;
378
379 r->Data.SOA.pNameAdministrator = dns_dname_from_msg( msg, pos );
380 if (!r->Data.SOA.pNameAdministrator)
381 {
382 heap_free( r->Data.SOA.pNamePrimaryServer );
383 return ERROR_NOT_ENOUGH_MEMORY;
384 }
385
386 if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
387 return DNS_ERROR_BAD_PACKET;
388
389 r->Data.SOA.dwSerialNo = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
390 r->Data.SOA.dwRefresh = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
391 r->Data.SOA.dwRetry = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
392 r->Data.SOA.dwExpire = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
393 r->Data.SOA.dwDefaultTtl = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
394
395 *dlen = sizeof(DNS_SOA_DATAA);
396 break;
397 }
398 case ns_t_srv:
399 {
400 r->Data.SRV.wPriority = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
401 r->Data.SRV.wWeight = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
402 r->Data.SRV.wPort = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
403
404 r->Data.SRV.pNameTarget = dns_dname_from_msg( msg, pos );
405 if (!r->Data.SRV.pNameTarget) return ERROR_NOT_ENOUGH_MEMORY;
406
407 *dlen = sizeof(DNS_SRV_DATAA);
408 break;
409 }
410 case ns_t_hinfo:
411 case ns_t_isdn:
412 case ns_t_x25:
413 case ns_t_txt:
414 {
415 i = 0;
416 while (pos[0] && pos < rr->rdata + rr->rdlength)
417 {
418 r->Data.TXT.pStringArray[i] = dns_str_from_rdata( pos );
419 if (!r->Data.TXT.pStringArray[i])
420 {
421 while (i > 0) heap_free( r->Data.TXT.pStringArray[--i] );
422 return ERROR_NOT_ENOUGH_MEMORY;
423 }
424 i++;
425 pos += pos[0] + 1;
426 }
427 r->Data.TXT.dwStringCount = i;
428 *dlen = sizeof(DNS_TXT_DATAA) + (i - 1) * sizeof(PCHAR);
429 break;
430 }
431 case ns_t_atma:
432 case ns_t_loc:
433 case ns_t_nxt:
434 case ns_t_tsig:
435 case ns_t_wks:
436 case 0x00f9: /* TKEY */
437 case 0xff01: /* WINS */
438 case 0xff02: /* WINSR */
439 default:
440 FIXME( "unhandled type: %s\n", dns_type_to_str( rr->type ) );
441 return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
442 }
443
444 return ret;
445 }
446
447 static DNS_STATUS dns_copy_record( ns_msg msg, ns_sect section,
448 unsigned short num, DNS_RECORDA **recp )
449 {
450 DNS_STATUS ret;
451 DNS_RECORDA *record;
452 WORD dlen;
453 ns_rr rr;
454
455 if (dns_ns_parserr( &msg, section, num, &rr ) < 0)
456 return DNS_ERROR_BAD_PACKET;
457
458 if (!(record = heap_alloc_zero( dns_get_record_size( &rr ) )))
459 return ERROR_NOT_ENOUGH_MEMORY;
460
461 record->pName = dns_strdup_u( rr.name );
462 if (!record->pName)
463 {
464 heap_free( record );
465 return ERROR_NOT_ENOUGH_MEMORY;
466 }
467
468 record->wType = rr.type;
469 record->Flags.S.Section = section;
470 record->Flags.S.CharSet = DnsCharSetUtf8;
471 record->dwTtl = rr.ttl;
472
473 if ((ret = dns_copy_rdata( msg, &rr, record, &dlen )))
474 {
475 heap_free( record->pName );
476 heap_free( record );
477 return ret;
478 }
479 record->wDataLength = dlen;
480 *recp = record;
481
482 TRACE( "found %s record in %s section\n",
483 dns_type_to_str( rr.type ), dns_section_to_str( section ) );
484 return ERROR_SUCCESS;
485 }
486
487 #define DEFAULT_TTL 1200
488
489 static DNS_STATUS dns_do_query_netbios( PCSTR name, DNS_RECORDA **recp )
490 {
491 NCB ncb;
492 UCHAR ret;
493 DNS_RRSET rrset;
494 FIND_NAME_BUFFER *buffer;
495 FIND_NAME_HEADER *header;
496 DNS_RECORDA *record = NULL;
497 unsigned int i, len;
498 DNS_STATUS status = ERROR_INVALID_NAME;
499
500 len = strlen( name );
501 if (len >= NCBNAMSZ) return DNS_ERROR_RCODE_NAME_ERROR;
502
503 DNS_RRSET_INIT( rrset );
504
505 memset( &ncb, 0, sizeof(ncb) );
506 ncb.ncb_command = NCBFINDNAME;
507
508 memset( ncb.ncb_callname, ' ', sizeof(ncb.ncb_callname) );
509 memcpy( ncb.ncb_callname, name, len );
510 ncb.ncb_callname[NCBNAMSZ - 1] = '\0';
511
512 ret = Netbios( &ncb );
513 if (ret != NRC_GOODRET) return ERROR_INVALID_NAME;
514
515 header = (FIND_NAME_HEADER *)ncb.ncb_buffer;
516 buffer = (FIND_NAME_BUFFER *)((char *)header + sizeof(FIND_NAME_HEADER));
517
518 for (i = 0; i < header->node_count; i++)
519 {
520 record = heap_alloc_zero( sizeof(DNS_RECORDA) );
521 if (!record)
522 {
523 status = ERROR_NOT_ENOUGH_MEMORY;
524 goto exit;
525 }
526 else
527 {
528 record->pName = dns_strdup_u( name );
529 if (!record->pName)
530 {
531 status = ERROR_NOT_ENOUGH_MEMORY;
532 goto exit;
533 }
534
535 record->wType = DNS_TYPE_A;
536 record->Flags.S.Section = DnsSectionAnswer;
537 record->Flags.S.CharSet = DnsCharSetUtf8;
538 record->dwTtl = DEFAULT_TTL;
539
540 /* FIXME: network byte order? */
541 record->Data.A.IpAddress = *(DWORD *)((char *)buffer[i].destination_addr + 2);
542
543 DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
544 }
545 }
546 status = ERROR_SUCCESS;
547
548 exit:
549 DNS_RRSET_TERMINATE( rrset );
550
551 if (status != ERROR_SUCCESS)
552 DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
553 else
554 *recp = (DNS_RECORDA *)rrset.pFirstRR;
555
556 return status;
557 }
558
559 /* The resolver lock must be held and res_init() must have been
560 * called before calling these three functions.
561 */
562 static DNS_STATUS dns_set_serverlist( const IP4_ARRAY *addrs )
563 {
564 int i;
565
566 if (addrs->AddrCount > MAXNS)
567 {
568 WARN( "too many servers: %d only using the first: %d\n",
569 addrs->AddrCount, MAXNS );
570 _res.nscount = MAXNS;
571 }
572 else _res.nscount = addrs->AddrCount;
573
574 for (i = 0; i < _res.nscount; i++)
575 _res.nsaddr_list[i].sin_addr.s_addr = addrs->AddrArray[i];
576
577 return ERROR_SUCCESS;
578 }
579
580 static DNS_STATUS dns_get_serverlist( PIP4_ARRAY addrs, PDWORD len )
581 {
582 unsigned int size;
583 int i;
584
585 size = sizeof(IP4_ARRAY) + sizeof(IP4_ADDRESS) * (_res.nscount - 1);
586 if (!addrs || *len < size)
587 {
588 *len = size;
589 return ERROR_INSUFFICIENT_BUFFER;
590 }
591
592 addrs->AddrCount = _res.nscount;
593
594 for (i = 0; i < _res.nscount; i++)
595 addrs->AddrArray[i] = _res.nsaddr_list[i].sin_addr.s_addr;
596
597 return ERROR_SUCCESS;
598 }
599
600 static DNS_STATUS dns_do_query( PCSTR name, WORD type, DWORD options,
601 PDNS_RECORDA *result )
602 {
603 DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
604
605 unsigned int i, num;
606 unsigned char answer[NS_PACKETSZ];
607 ns_sect sections[] = { ns_s_an, ns_s_ar };
608 ns_msg msg;
609
610 DNS_RECORDA *record = NULL;
611 DNS_RRSET rrset;
612 int len;
613
614 DNS_RRSET_INIT( rrset );
615
616 len = res_query( name, ns_c_in, type, answer, sizeof(answer) );
617 if (len < 0)
618 {
619 ret = dns_map_h_errno( h_errno );
620 goto exit;
621 }
622
623 if (dns_ns_initparse( answer, len, &msg ) < 0)
624 {
625 ret = DNS_ERROR_BAD_PACKET;
626 goto exit;
627 }
628
629 #define RCODE_MASK 0x0f
630 if ((msg._flags & RCODE_MASK) != ns_r_noerror)
631 {
632 ret = dns_map_error( msg._flags & RCODE_MASK );
633 goto exit;
634 }
635
636 for (i = 0; i < sizeof(sections)/sizeof(sections[0]); i++)
637 {
638 for (num = 0; num < ns_msg_count( msg, sections[i] ); num++)
639 {
640 ret = dns_copy_record( msg, sections[i], num, &record );
641 if (ret != ERROR_SUCCESS) goto exit;
642
643 DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
644 }
645 }
646
647 exit:
648 DNS_RRSET_TERMINATE( rrset );
649
650 if (ret != ERROR_SUCCESS)
651 DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
652 else
653 *result = (DNS_RECORDA *)rrset.pFirstRR;
654
655 return ret;
656 }
657
658 #endif /* HAVE_RESOLV */
659
660 /******************************************************************************
661 * DnsQuery_A [DNSAPI.@]
662 *
663 */
664 DNS_STATUS WINAPI DnsQuery_A( PCSTR name, WORD type, DWORD options, PVOID servers,
665 PDNS_RECORDA *result, PVOID *reserved )
666 {
667 WCHAR *nameW;
668 DNS_RECORDW *resultW;
669 DNS_STATUS status;
670
671 TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_a(name), dns_type_to_str( type ),
672 options, servers, result, reserved );
673
674 if (!name || !result)
675 return ERROR_INVALID_PARAMETER;
676
677 nameW = dns_strdup_aw( name );
678 if (!nameW) return ERROR_NOT_ENOUGH_MEMORY;
679
680 status = DnsQuery_W( nameW, type, options, servers, &resultW, reserved );
681
682 if (status == ERROR_SUCCESS)
683 {
684 *result = (DNS_RECORDA *)DnsRecordSetCopyEx(
685 (DNS_RECORD *)resultW, DnsCharSetUnicode, DnsCharSetAnsi );
686
687 if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
688 DnsRecordListFree( (DNS_RECORD *)resultW, DnsFreeRecordList );
689 }
690
691 heap_free( nameW );
692 return status;
693 }
694
695 /******************************************************************************
696 * DnsQuery_UTF8 [DNSAPI.@]
697 *
698 */
699 DNS_STATUS WINAPI DnsQuery_UTF8( PCSTR name, WORD type, DWORD options, PVOID servers,
700 PDNS_RECORDA *result, PVOID *reserved )
701 {
702 DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
703 #ifdef HAVE_RESOLV
704
705 TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_a(name), dns_type_to_str( type ),
706 options, servers, result, reserved );
707
708 if (!name || !result)
709 return ERROR_INVALID_PARAMETER;
710
711 LOCK_RESOLVER();
712
713 initialise_resolver();
714 _res.options |= dns_map_options( options );
715
716 if (servers && (ret = dns_set_serverlist( servers )))
717 {
718 UNLOCK_RESOLVER();
719 return ret;
720 }
721
722 ret = dns_do_query( name, type, options, result );
723
724 if (ret == DNS_ERROR_RCODE_NAME_ERROR && type == DNS_TYPE_A &&
725 !(options & DNS_QUERY_NO_NETBT))
726 {
727 TRACE( "dns lookup failed, trying netbios query\n" );
728 ret = dns_do_query_netbios( name, result );
729 }
730
731 UNLOCK_RESOLVER();
732
733 #endif
734 return ret;
735 }
736
737 /******************************************************************************
738 * DnsQuery_W [DNSAPI.@]
739 *
740 */
741 DNS_STATUS WINAPI DnsQuery_W( PCWSTR name, WORD type, DWORD options, PVOID servers,
742 PDNS_RECORDW *result, PVOID *reserved )
743 {
744 char *nameU;
745 DNS_RECORDA *resultA;
746 DNS_STATUS status;
747
748 TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_w(name), dns_type_to_str( type ),
749 options, servers, result, reserved );
750
751 if (!name || !result)
752 return ERROR_INVALID_PARAMETER;
753
754 nameU = dns_strdup_wu( name );
755 if (!nameU) return ERROR_NOT_ENOUGH_MEMORY;
756
757 status = DnsQuery_UTF8( nameU, type, options, servers, &resultA, reserved );
758
759 if (status == ERROR_SUCCESS)
760 {
761 *result = (DNS_RECORDW *)DnsRecordSetCopyEx(
762 (DNS_RECORD *)resultA, DnsCharSetUtf8, DnsCharSetUnicode );
763
764 if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
765 DnsRecordListFree( (DNS_RECORD *)resultA, DnsFreeRecordList );
766 }
767
768 heap_free( nameU );
769 return status;
770 }
771
772 static DNS_STATUS dns_get_hostname_a( COMPUTER_NAME_FORMAT format,
773 PSTR buffer, PDWORD len )
774 {
775 char name[256];
776 DWORD size = sizeof(name)/sizeof(name[0]);
777
778 if (!GetComputerNameExA( format, name, &size ))
779 return DNS_ERROR_NAME_DOES_NOT_EXIST;
780
781 if (!buffer || (size = lstrlenA( name ) + 1) > *len)
782 {
783 *len = size;
784 return ERROR_INSUFFICIENT_BUFFER;
785 }
786
787 lstrcpyA( buffer, name );
788 return ERROR_SUCCESS;
789 }
790
791 static DNS_STATUS dns_get_hostname_w( COMPUTER_NAME_FORMAT format,
792 PWSTR buffer, PDWORD len )
793 {
794 WCHAR name[256];
795 DWORD size = sizeof(name)/sizeof(name[0]);
796
797 if (!GetComputerNameExW( format, name, &size ))
798 return DNS_ERROR_NAME_DOES_NOT_EXIST;
799
800 if (!buffer || (size = lstrlenW( name ) + 1) > *len)
801 {
802 *len = size;
803 return ERROR_INSUFFICIENT_BUFFER;
804 }
805
806 lstrcpyW( buffer, name );
807 return ERROR_SUCCESS;
808 }
809
810 /******************************************************************************
811 * DnsQueryConfig [DNSAPI.@]
812 *
813 */
814 DNS_STATUS WINAPI DnsQueryConfig( DNS_CONFIG_TYPE config, DWORD flag, PCWSTR adapter,
815 PVOID reserved, PVOID buffer, PDWORD len )
816 {
817 DNS_STATUS ret = ERROR_INVALID_PARAMETER;
818
819 TRACE( "(%d,0x%08x,%s,%p,%p,%p)\n", config, flag, debugstr_w(adapter),
820 reserved, buffer, len );
821
822 if (!len) return ERROR_INVALID_PARAMETER;
823
824 switch (config)
825 {
826 case DnsConfigDnsServerList:
827 {
828 #ifdef HAVE_RESOLV
829 LOCK_RESOLVER();
830
831 initialise_resolver();
832 ret = dns_get_serverlist( buffer, len );
833
834 UNLOCK_RESOLVER();
835 break;
836 #else
837 WARN( "compiled without resolver support\n" );
838 break;
839 #endif
840 }
841 case DnsConfigHostName_A:
842 case DnsConfigHostName_UTF8:
843 return dns_get_hostname_a( ComputerNameDnsHostname, buffer, len );
844
845 case DnsConfigFullHostName_A:
846 case DnsConfigFullHostName_UTF8:
847 return dns_get_hostname_a( ComputerNameDnsFullyQualified, buffer, len );
848
849 case DnsConfigPrimaryDomainName_A:
850 case DnsConfigPrimaryDomainName_UTF8:
851 return dns_get_hostname_a( ComputerNameDnsDomain, buffer, len );
852
853 case DnsConfigHostName_W:
854 return dns_get_hostname_w( ComputerNameDnsHostname, buffer, len );
855
856 case DnsConfigFullHostName_W:
857 return dns_get_hostname_w( ComputerNameDnsFullyQualified, buffer, len );
858
859 case DnsConfigPrimaryDomainName_W:
860 return dns_get_hostname_w( ComputerNameDnsDomain, buffer, len );
861
862 case DnsConfigAdapterDomainName_A:
863 case DnsConfigAdapterDomainName_W:
864 case DnsConfigAdapterDomainName_UTF8:
865 case DnsConfigSearchList:
866 case DnsConfigAdapterInfo:
867 case DnsConfigPrimaryHostNameRegistrationEnabled:
868 case DnsConfigAdapterHostNameRegistrationEnabled:
869 case DnsConfigAddressRegistrationMaxCount:
870 FIXME( "unimplemented config type %d\n", config );
871 break;
872
873 default:
874 WARN( "unknown config type: %d\n", config );
875 break;
876 }
877 return ret;
878 }
GSOC 2012 project to enhance the control panel