dlls/dnsapi/record.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 "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
  39 #include "windef.h"
  40 #include "winbase.h"
  41 #include "winerror.h"
  42 #include "winnls.h"
  43 #include "windns.h"
  44
  45 #include "dnsapi.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
  48
  49 const char *dns_type_to_str( unsigned short type )
  50 {
  51     switch (type)
  52     {
  53 #define X(x)    case (x): return #x;
  54     X(DNS_TYPE_ZERO)
  55     X(DNS_TYPE_A)
  56     X(DNS_TYPE_NS)
  57     X(DNS_TYPE_MD)
  58     X(DNS_TYPE_MF)
  59     X(DNS_TYPE_CNAME)
  60     X(DNS_TYPE_SOA)
  61     X(DNS_TYPE_MB)
  62     X(DNS_TYPE_MG)
  63     X(DNS_TYPE_MR)
  64     X(DNS_TYPE_NULL)
  65     X(DNS_TYPE_WKS)
  66     X(DNS_TYPE_PTR)
  67     X(DNS_TYPE_HINFO)
  68     X(DNS_TYPE_MINFO)
  69     X(DNS_TYPE_MX)
  70     X(DNS_TYPE_TEXT)
  71     X(DNS_TYPE_RP)
  72     X(DNS_TYPE_AFSDB)
  73     X(DNS_TYPE_X25)
  74     X(DNS_TYPE_ISDN)
  75     X(DNS_TYPE_RT)
  76     X(DNS_TYPE_NSAP)
  77     X(DNS_TYPE_NSAPPTR)
  78     X(DNS_TYPE_SIG)
  79     X(DNS_TYPE_KEY)
  80     X(DNS_TYPE_PX)
  81     X(DNS_TYPE_GPOS)
  82     X(DNS_TYPE_AAAA)
  83     X(DNS_TYPE_LOC)
  84     X(DNS_TYPE_NXT)
  85     X(DNS_TYPE_EID)
  86     X(DNS_TYPE_NIMLOC)
  87     X(DNS_TYPE_SRV)
  88     X(DNS_TYPE_ATMA)
  89     X(DNS_TYPE_NAPTR)
  90     X(DNS_TYPE_KX)
  91     X(DNS_TYPE_CERT)
  92     X(DNS_TYPE_A6)
  93     X(DNS_TYPE_DNAME)
  94     X(DNS_TYPE_SINK)
  95     X(DNS_TYPE_OPT)
  96     X(DNS_TYPE_UINFO)
  97     X(DNS_TYPE_UID)
  98     X(DNS_TYPE_GID)
  99     X(DNS_TYPE_UNSPEC)
 100     X(DNS_TYPE_ADDRS)
 101     X(DNS_TYPE_TKEY)
 102     X(DNS_TYPE_TSIG)
 103     X(DNS_TYPE_IXFR)
 104     X(DNS_TYPE_AXFR)
 105     X(DNS_TYPE_MAILB)
 106     X(DNS_TYPE_MAILA)
 107     X(DNS_TYPE_ANY)
 108     X(DNS_TYPE_WINS)
 109     X(DNS_TYPE_WINSR)
 110 #undef X
 111     default: { static char tmp[7]; sprintf( tmp, "0x%04x", type ); return tmp; }
 112     }
 113 }
 114
 115 static int dns_strcmpX( LPCVOID str1, LPCVOID str2, BOOL wide )
 116 {
 117     if (wide)
 118         return lstrcmpiW( str1, str2 );
 119     else
 120         return lstrcmpiA( str1, str2 );
 121 }
 122
 123 /******************************************************************************
 124  * DnsRecordCompare                        [DNSAPI.@]
 125  *
 126  */
 127 BOOL WINAPI DnsRecordCompare( PDNS_RECORD r1, PDNS_RECORD r2 )
 128 {
 129     BOOL wide;
 130     unsigned int i;
 131
 132     TRACE( "(%p,%p)\n", r1, r2 );
 133
 134     if (r1->wType       != r2->wType       ||
 135         r1->wDataLength != r2->wDataLength ||
 136         r1->Flags.DW    != r2->Flags.DW    ||
 137         r1->dwReserved  != r2->dwReserved) return FALSE;
 138
 139     wide = (r1->Flags.S.CharSet == DnsCharSetUnicode) ? TRUE : FALSE;
 140     if (dns_strcmpX( r1->pName, r2->pName, wide )) return FALSE;
 141
 142     switch (r1->wType)
 143     {
 144     case DNS_TYPE_A:
 145     {
 146         if (r1->Data.A.IpAddress != r2->Data.A.IpAddress) return FALSE;
 147         break;
 148     }
 149     case DNS_TYPE_SOA:
 150     {
 151         if (r1->Data.SOA.dwSerialNo   != r2->Data.SOA.dwSerialNo ||
 152             r1->Data.SOA.dwRefresh    != r2->Data.SOA.dwRefresh  ||
 153             r1->Data.SOA.dwRetry      != r2->Data.SOA.dwRetry    ||
 154             r1->Data.SOA.dwExpire     != r2->Data.SOA.dwExpire   ||
 155             r1->Data.SOA.dwDefaultTtl != r2->Data.SOA.dwDefaultTtl)
 156             return FALSE;
 157         if (dns_strcmpX( r1->Data.SOA.pNamePrimaryServer,
 158                          r2->Data.SOA.pNamePrimaryServer, wide ) ||
 159             dns_strcmpX( r1->Data.SOA.pNameAdministrator,
 160                          r2->Data.SOA.pNameAdministrator, wide ))
 161             return FALSE;
 162         break;
 163     }
 164     case DNS_TYPE_PTR:
 165     case DNS_TYPE_NS:
 166     case DNS_TYPE_CNAME:
 167     case DNS_TYPE_MB:
 168     case DNS_TYPE_MD:
 169     case DNS_TYPE_MF:
 170     case DNS_TYPE_MG:
 171     case DNS_TYPE_MR:
 172     {
 173         if (dns_strcmpX( r1->Data.PTR.pNameHost,
 174                          r2->Data.PTR.pNameHost, wide )) return FALSE;
 175         break;
 176     }
 177     case DNS_TYPE_MINFO:
 178     case DNS_TYPE_RP:
 179     {
 180         if (dns_strcmpX( r1->Data.MINFO.pNameMailbox,
 181                          r2->Data.MINFO.pNameMailbox, wide ) ||
 182             dns_strcmpX( r1->Data.MINFO.pNameErrorsMailbox,
 183                          r2->Data.MINFO.pNameErrorsMailbox, wide ))
 184             return FALSE;
 185         break;
 186     }
 187     case DNS_TYPE_MX:
 188     case DNS_TYPE_AFSDB:
 189     case DNS_TYPE_RT:
 190     {
 191         if (r1->Data.MX.wPreference != r2->Data.MX.wPreference)
 192             return FALSE;
 193         if (dns_strcmpX( r1->Data.MX.pNameExchange,
 194                          r2->Data.MX.pNameExchange, wide ))
 195             return FALSE;
 196         break;
 197     }
 198     case DNS_TYPE_HINFO:
 199     case DNS_TYPE_ISDN:
 200     case DNS_TYPE_TEXT:
 201     case DNS_TYPE_X25:
 202     {
 203         if (r1->Data.TXT.dwStringCount != r2->Data.TXT.dwStringCount)
 204             return FALSE;
 205         for (i = 0; i < r1->Data.TXT.dwStringCount; i++)
 206         {
 207             if (dns_strcmpX( r1->Data.TXT.pStringArray[i],
 208                              r2->Data.TXT.pStringArray[i], wide ))
 209                 return FALSE;
 210         }
 211         break;
 212     }
 213     case DNS_TYPE_NULL:
 214     {
 215         if (r1->Data.Null.dwByteCount != r2->Data.Null.dwByteCount)
 216             return FALSE;
 217         if (memcmp( r1->Data.Null.Data,
 218                     r2->Data.Null.Data, r1->Data.Null.dwByteCount ))
 219             return FALSE;
 220         break;
 221     }
 222     case DNS_TYPE_AAAA:
 223     {
 224         for (i = 0; i < sizeof(IP6_ADDRESS)/sizeof(DWORD); i++)
 225         {
 226             if (r1->Data.AAAA.Ip6Address.IP6Dword[i] !=
 227                 r2->Data.AAAA.Ip6Address.IP6Dword[i]) return FALSE;
 228         }
 229         break;
 230     }
 231     case DNS_TYPE_KEY:
 232     {
 233         if (r1->Data.KEY.wFlags      != r2->Data.KEY.wFlags      ||
 234             r1->Data.KEY.chProtocol  != r2->Data.KEY.chProtocol  ||
 235             r1->Data.KEY.chAlgorithm != r2->Data.KEY.chAlgorithm)
 236             return FALSE;
 237         if (memcmp( r1->Data.KEY.Key, r2->Data.KEY.Key,
 238                     r1->wDataLength - sizeof(DNS_KEY_DATA) + 1 ))
 239             return FALSE;
 240         break;
 241     }
 242     case DNS_TYPE_SIG:
 243     {
 244         if (dns_strcmpX( r1->Data.SIG.pNameSigner,
 245                          r2->Data.SIG.pNameSigner, wide ))
 246             return FALSE;
 247         if (r1->Data.SIG.wTypeCovered  != r2->Data.SIG.wTypeCovered  ||
 248             r1->Data.SIG.chAlgorithm   != r2->Data.SIG.chAlgorithm   ||
 249             r1->Data.SIG.chLabelCount  != r2->Data.SIG.chLabelCount  ||
 250             r1->Data.SIG.dwOriginalTtl != r2->Data.SIG.dwOriginalTtl ||
 251             r1->Data.SIG.dwExpiration  != r2->Data.SIG.dwExpiration  ||
 252             r1->Data.SIG.dwTimeSigned  != r2->Data.SIG.dwTimeSigned  ||
 253             r1->Data.SIG.wKeyTag       != r2->Data.SIG.wKeyTag)
 254             return FALSE;
 255         if (memcmp( r1->Data.SIG.Signature, r2->Data.SIG.Signature,
 256                     r1->wDataLength - sizeof(DNS_SIG_DATAA) + 1 ))
 257             return FALSE;
 258         break;
 259     }
 260     case DNS_TYPE_ATMA:
 261     {
 262         if (r1->Data.ATMA.AddressType != r2->Data.ATMA.AddressType)
 263             return FALSE;
 264         for (i = 0; i < DNS_ATMA_MAX_ADDR_LENGTH; i++)
 265         {
 266             if (r1->Data.ATMA.Address[i] != r2->Data.ATMA.Address[i])
 267                 return FALSE;
 268         }
 269         break;
 270     }
 271     case DNS_TYPE_NXT:
 272     {
 273         if (dns_strcmpX( r1->Data.NXT.pNameNext,
 274                          r2->Data.NXT.pNameNext, wide )) return FALSE;
 275         if (r1->Data.NXT.wNumTypes != r2->Data.NXT.wNumTypes) return FALSE;
 276         if (memcmp( r1->Data.NXT.wTypes, r2->Data.NXT.wTypes,
 277                     r1->wDataLength - sizeof(DNS_NXT_DATAA) + sizeof(WORD) ))
 278             return FALSE;
 279         break;
 280     }
 281     case DNS_TYPE_SRV:
 282     {
 283         if (dns_strcmpX( r1->Data.SRV.pNameTarget,
 284                          r2->Data.SRV.pNameTarget, wide )) return FALSE;
 285         if (r1->Data.SRV.wPriority != r2->Data.SRV.wPriority ||
 286             r1->Data.SRV.wWeight   != r2->Data.SRV.wWeight   ||
 287             r1->Data.SRV.wPort     != r2->Data.SRV.wPort)
 288             return FALSE;
 289         break;
 290     }
 291     case DNS_TYPE_TKEY:
 292     {
 293         if (dns_strcmpX( r1->Data.TKEY.pNameAlgorithm,
 294                          r2->Data.TKEY.pNameAlgorithm, wide ))
 295             return FALSE;
 296         if (r1->Data.TKEY.dwCreateTime    != r2->Data.TKEY.dwCreateTime     ||
 297             r1->Data.TKEY.dwExpireTime    != r2->Data.TKEY.dwExpireTime     ||
 298             r1->Data.TKEY.wMode           != r2->Data.TKEY.wMode            ||
 299             r1->Data.TKEY.wError          != r2->Data.TKEY.wError           ||
 300             r1->Data.TKEY.wKeyLength      != r2->Data.TKEY.wKeyLength       ||
 301             r1->Data.TKEY.wOtherLength    != r2->Data.TKEY.wOtherLength     ||
 302             r1->Data.TKEY.cAlgNameLength  != r2->Data.TKEY.cAlgNameLength   ||
 303             r1->Data.TKEY.bPacketPointers != r2->Data.TKEY.bPacketPointers)
 304             return FALSE;
 305
 306         /* FIXME: ignoring pAlgorithmPacket field */
 307         if (memcmp( r1->Data.TKEY.pKey, r2->Data.TKEY.pKey,
 308                     r1->Data.TKEY.wKeyLength ) ||
 309             memcmp( r1->Data.TKEY.pOtherData, r2->Data.TKEY.pOtherData,
 310                     r1->Data.TKEY.wOtherLength )) return FALSE;
 311         break;
 312     }
 313     case DNS_TYPE_TSIG:
 314     {
 315         if (dns_strcmpX( r1->Data.TSIG.pNameAlgorithm,
 316                          r2->Data.TSIG.pNameAlgorithm, wide ))
 317             return FALSE;
 318         if (r1->Data.TSIG.i64CreateTime   != r2->Data.TSIG.i64CreateTime    ||
 319             r1->Data.TSIG.wFudgeTime      != r2->Data.TSIG.wFudgeTime       ||
 320             r1->Data.TSIG.wOriginalXid    != r2->Data.TSIG.wOriginalXid     ||
 321             r1->Data.TSIG.wError          != r2->Data.TSIG.wError           ||
 322             r1->Data.TSIG.wSigLength      != r2->Data.TSIG.wSigLength       ||
 323             r1->Data.TSIG.wOtherLength    != r2->Data.TSIG.wOtherLength     ||
 324             r1->Data.TSIG.cAlgNameLength  != r2->Data.TSIG.cAlgNameLength   ||
 325             r1->Data.TSIG.bPacketPointers != r2->Data.TSIG.bPacketPointers)
 326             return FALSE;
 327
 328         /* FIXME: ignoring pAlgorithmPacket field */
 329         if (memcmp( r1->Data.TSIG.pSignature, r2->Data.TSIG.pSignature,
 330                     r1->Data.TSIG.wSigLength ) ||
 331             memcmp( r1->Data.TSIG.pOtherData, r2->Data.TSIG.pOtherData,
 332                     r1->Data.TSIG.wOtherLength )) return FALSE;
 333         break;
 334     }
 335     case DNS_TYPE_WINS:
 336     {
 337         if (r1->Data.WINS.dwMappingFlag    != r2->Data.WINS.dwMappingFlag   ||
 338             r1->Data.WINS.dwLookupTimeout  != r2->Data.WINS.dwLookupTimeout ||
 339             r1->Data.WINS.dwCacheTimeout   != r2->Data.WINS.dwCacheTimeout  ||
 340             r1->Data.WINS.cWinsServerCount != r2->Data.WINS.cWinsServerCount)
 341             return FALSE;
 342         if (memcmp( r1->Data.WINS.WinsServers, r2->Data.WINS.WinsServers,
 343                     r1->wDataLength - sizeof(DNS_WINS_DATA) + sizeof(IP4_ADDRESS) ))
 344             return FALSE;
 345         break;
 346     }
 347     case DNS_TYPE_WINSR:
 348     {
 349         if (r1->Data.WINSR.dwMappingFlag   != r2->Data.WINSR.dwMappingFlag   ||
 350             r1->Data.WINSR.dwLookupTimeout != r2->Data.WINSR.dwLookupTimeout ||
 351             r1->Data.WINSR.dwCacheTimeout  != r2->Data.WINSR.dwCacheTimeout)
 352             return FALSE;
 353         if (dns_strcmpX( r1->Data.WINSR.pNameResultDomain,
 354                          r2->Data.WINSR.pNameResultDomain, wide ))
 355             return FALSE;
 356         break;
 357     }
 358     default:
 359         FIXME( "unknown type: %s\n", dns_type_to_str( r1->wType ) );
 360         return FALSE;
 361     }
 362     return TRUE;
 363 }
 364
 365 static LPVOID dns_strcpyX( LPCVOID src, DNS_CHARSET in, DNS_CHARSET out )
 366 {
 367     switch (in)
 368     {
 369     case DnsCharSetUnicode:
 370     {
 371         switch (out)
 372         {
 373         case DnsCharSetUnicode: return dns_strdup_w( src );
 374         case DnsCharSetUtf8:    return dns_strdup_wu( src );
 375         case DnsCharSetAnsi:    return dns_strdup_wa( src );
 376         default:
 377             WARN( "unhandled target charset: %d\n", out );
 378             break;
 379         }
 380     }
 381     case DnsCharSetUtf8:
 382         switch (out)
 383         {
 384         case DnsCharSetUnicode: return dns_strdup_uw( src );
 385         case DnsCharSetUtf8:    return dns_strdup_u( src );
 386         case DnsCharSetAnsi:    return dns_strdup_ua( src );
 387         default:
 388             WARN( "unhandled target charset: %d\n", out );
 389             break;
 390         }
 391     case DnsCharSetAnsi:
 392         switch (out)
 393         {
 394         case DnsCharSetUnicode: return dns_strdup_aw( src );
 395         case DnsCharSetUtf8:    return dns_strdup_au( src );
 396         case DnsCharSetAnsi:    return dns_strdup_a( src );
 397         default:
 398             WARN( "unhandled target charset: %d\n", out );
 399             break;
 400         }
 401     default:
 402         WARN( "unhandled source charset: %d\n", in );
 403         break;
 404     }
 405     return NULL;
 406 }
 407
 408 /******************************************************************************
 409  * DnsRecordCopyEx                         [DNSAPI.@]
 410  *
 411  */
 412 PDNS_RECORD WINAPI DnsRecordCopyEx( PDNS_RECORD src, DNS_CHARSET in, DNS_CHARSET out )
 413 {
 414     DNS_RECORD *dst;
 415     unsigned int i, size;
 416
 417     TRACE( "(%p,%d,%d)\n", src, in, out );
 418
 419     size = FIELD_OFFSET(DNS_RECORD, Data) + src->wDataLength;
 420     dst = dns_zero_alloc( size );
 421     if (!dst) return NULL;
 422
 423     memcpy( dst, src, size );
 424
 425     if (src->Flags.S.CharSet == DnsCharSetUtf8 ||
 426         src->Flags.S.CharSet == DnsCharSetAnsi ||
 427         src->Flags.S.CharSet == DnsCharSetUnicode) in = src->Flags.S.CharSet;
 428
 429     dst->Flags.S.CharSet = out;
 430     dst->pName = dns_strcpyX( src->pName, in, out );
 431     if (!dst->pName) goto error;
 432
 433     switch (src->wType)
 434     {
 435     case DNS_TYPE_HINFO:
 436     case DNS_TYPE_ISDN:
 437     case DNS_TYPE_TEXT:
 438     case DNS_TYPE_X25:
 439     {
 440         for (i = 0; i < src->Data.TXT.dwStringCount; i++)
 441         {
 442             dst->Data.TXT.pStringArray[i] =
 443                 dns_strcpyX( src->Data.TXT.pStringArray[i], in, out );
 444
 445             if (!dst->Data.TXT.pStringArray[i])
 446             {
 447                 for (--i; i >= 0; i--)
 448                     dns_free( dst->Data.TXT.pStringArray[i] );
 449                 goto error;
 450             }
 451         }
 452         break;
 453     }
 454     case DNS_TYPE_MINFO:
 455     case DNS_TYPE_RP:
 456     {
 457         dst->Data.MINFO.pNameMailbox =
 458             dns_strcpyX( src->Data.MINFO.pNameMailbox, in, out );
 459         if (!dst->Data.MINFO.pNameMailbox) goto error;
 460
 461         dst->Data.MINFO.pNameErrorsMailbox =
 462             dns_strcpyX( src->Data.MINFO.pNameErrorsMailbox, in, out );
 463         if (!dst->Data.MINFO.pNameErrorsMailbox)
 464         {
 465             dns_free( dst->Data.MINFO.pNameMailbox );
 466             goto error;
 467         }
 468         break;
 469     }
 470     case DNS_TYPE_AFSDB:
 471     case DNS_TYPE_RT:
 472     case DNS_TYPE_MX:
 473     {
 474         dst->Data.MX.pNameExchange =
 475             dns_strcpyX( src->Data.MX.pNameExchange, in, out );
 476         if (!dst->Data.MX.pNameExchange) goto error;
 477         break;
 478     }
 479     case DNS_TYPE_NXT:
 480     {
 481         dst->Data.NXT.pNameNext =
 482             dns_strcpyX( src->Data.NXT.pNameNext, in, out );
 483         if (!dst->Data.NXT.pNameNext) goto error;
 484         break;
 485     }
 486     case DNS_TYPE_CNAME:
 487     case DNS_TYPE_MB:
 488     case DNS_TYPE_MD:
 489     case DNS_TYPE_MF:
 490     case DNS_TYPE_MG:
 491     case DNS_TYPE_MR:
 492     case DNS_TYPE_NS:
 493     case DNS_TYPE_PTR:
 494     {
 495         dst->Data.PTR.pNameHost =
 496             dns_strcpyX( src->Data.PTR.pNameHost, in, out );
 497         if (!dst->Data.PTR.pNameHost) goto error;
 498         break;
 499     }
 500     case DNS_TYPE_SIG:
 501     {
 502         dst->Data.SIG.pNameSigner =
 503             dns_strcpyX( src->Data.SIG.pNameSigner, in, out );
 504         if (!dst->Data.SIG.pNameSigner) goto error;
 505         break;
 506     }
 507     case DNS_TYPE_SOA:
 508     {
 509         dst->Data.SOA.pNamePrimaryServer =
 510             dns_strcpyX( src->Data.SOA.pNamePrimaryServer, in, out );
 511         if (!dst->Data.SOA.pNamePrimaryServer) goto error;
 512
 513         dst->Data.SOA.pNameAdministrator =
 514             dns_strcpyX( src->Data.SOA.pNameAdministrator, in, out );
 515         if (!dst->Data.SOA.pNameAdministrator)
 516         {
 517             dns_free( dst->Data.SOA.pNamePrimaryServer );
 518             goto error;
 519         }
 520         break;
 521     }
 522     case DNS_TYPE_SRV:
 523     {
 524         dst->Data.SRV.pNameTarget =
 525             dns_strcpyX( src->Data.SRV.pNameTarget, in, out );
 526         if (!dst->Data.SRV.pNameTarget) goto error;
 527         break;
 528     }
 529     default:
 530         break;
 531     }
 532     return dst;
 533
 534 error:
 535     dns_free( dst->pName );
 536     dns_free( dst );
 537     return NULL;
 538 }
 539
 540 /******************************************************************************
 541  * DnsRecordListFree                       [DNSAPI.@]
 542  *
 543  */
 544 void WINAPI DnsRecordListFree( PDNS_RECORD list, DNS_FREE_TYPE type )
 545 {
 546     DNS_RECORD *r, *next;
 547     unsigned int i;
 548
 549     TRACE( "(%p,%d)\n", list, type );
 550
 551     if (!list) return;
 552
 553     switch (type)
 554     {
 555     case DnsFreeRecordList:
 556     {
 557         for (r = list; (list = r); r = next)
 558         {
 559             dns_free( r->pName );
 560
 561             switch (r->wType)
 562             {
 563             case DNS_TYPE_HINFO:
 564             case DNS_TYPE_ISDN:
 565             case DNS_TYPE_TEXT:
 566             case DNS_TYPE_X25:
 567             {
 568                 for (i = 0; i < r->Data.TXT.dwStringCount; i++)
 569                     dns_free( r->Data.TXT.pStringArray[i] );
 570
 571                 break;
 572             }
 573             case DNS_TYPE_MINFO:
 574             case DNS_TYPE_RP:
 575             {
 576                 dns_free( r->Data.MINFO.pNameMailbox );
 577                 dns_free( r->Data.MINFO.pNameErrorsMailbox );
 578                 break;
 579             }
 580             case DNS_TYPE_AFSDB:
 581             case DNS_TYPE_RT:
 582             case DNS_TYPE_MX:
 583             {
 584                 dns_free( r->Data.MX.pNameExchange );
 585                 break;
 586             }
 587             case DNS_TYPE_NXT:
 588             {
 589                 dns_free( r->Data.NXT.pNameNext );
 590                 break;
 591             }
 592             case DNS_TYPE_CNAME:
 593             case DNS_TYPE_MB:
 594             case DNS_TYPE_MD:
 595             case DNS_TYPE_MF:
 596             case DNS_TYPE_MG:
 597             case DNS_TYPE_MR:
 598             case DNS_TYPE_NS:
 599             case DNS_TYPE_PTR:
 600             {
 601                 dns_free( r->Data.PTR.pNameHost );
 602                 break;
 603             }
 604             case DNS_TYPE_SIG:
 605             {
 606                 dns_free( r->Data.SIG.pNameSigner );
 607                 break;
 608             }
 609             case DNS_TYPE_SOA:
 610             {
 611                 dns_free( r->Data.SOA.pNamePrimaryServer );
 612                 dns_free( r->Data.SOA.pNameAdministrator );
 613                 break;
 614             }
 615             case DNS_TYPE_SRV:
 616             {
 617                 dns_free( r->Data.SRV.pNameTarget );
 618                 break;
 619             }
 620             default:
 621                 break;
 622             }
 623
 624             next = r->pNext;
 625             dns_free( r );
 626         }
 627         break;
 628     }
 629     case DnsFreeFlat:
 630     case DnsFreeParsedMessageFields:
 631     {
 632         FIXME( "unhandled free type: %d\n", type );
 633         break;
 634     }
 635     default:
 636         WARN( "unknown free type: %d\n", type );
 637         break;
 638     }
 639 }
 640
 641 /******************************************************************************
 642  * DnsRecordSetCompare                     [DNSAPI.@]
 643  *
 644  */
 645 BOOL WINAPI DnsRecordSetCompare( PDNS_RECORD set1, PDNS_RECORD set2,
 646                                  PDNS_RECORD *diff1, PDNS_RECORD *diff2 )
 647 {
 648     BOOL ret = TRUE;
 649     DNS_RECORD *r, *s1, *s2, *t, *u;
 650     DNS_RRSET rr1, rr2;
 651
 652     TRACE( "(%p,%p,%p,%p)\n", set1, set2, diff1, diff2 );
 653
 654     if (!set1 && !set2) return FALSE;
 655
 656     if (diff1) *diff1 = NULL;
 657     if (diff2) *diff2 = NULL;
 658
 659     if (set1 && !set2)
 660     {
 661         if (diff1) *diff1 = DnsRecordSetCopyEx( set1, 0, set1->Flags.S.CharSet );
 662         return FALSE;
 663     }
 664     if (!set1 && set2)
 665     {
 666         if (diff2) *diff2 = DnsRecordSetCopyEx( set2, 0, set2->Flags.S.CharSet );
 667         return FALSE;
 668     }
 669
 670     DNS_RRSET_INIT( rr1 );
 671     DNS_RRSET_INIT( rr2 );
 672
 673     for (r = s1 = set1; (s1 = r); r = r->pNext)
 674     {
 675         for (t = s2 = set2; (s2 = t); t = t->pNext)
 676         {
 677             u = DnsRecordCopyEx( r, r->Flags.S.CharSet, t->Flags.S.CharSet );
 678             if (!u) goto error;
 679
 680             if (!DnsRecordCompare( t, u ))
 681             {
 682                 DNS_RRSET_ADD( rr1, u );
 683                 ret = FALSE;
 684             }
 685             else dns_free( u );
 686         }
 687     }
 688
 689     for (t = s2 = set2; (s2 = t); t = t->pNext)
 690     {
 691         for (r = s1 = set1; (s1 = r); r = r->pNext)
 692         {
 693             u = DnsRecordCopyEx( t, t->Flags.S.CharSet, r->Flags.S.CharSet );
 694             if (!u) goto error;
 695
 696             if (!DnsRecordCompare( r, u ))
 697             {
 698                 DNS_RRSET_ADD( rr2, u );
 699                 ret = FALSE;
 700             }
 701             else dns_free( u );
 702         }
 703     }
 704
 705     DNS_RRSET_TERMINATE( rr1 );
 706     DNS_RRSET_TERMINATE( rr2 );
 707
 708     if (diff1) *diff1 = rr1.pFirstRR;
 709     if (diff2) *diff2 = rr2.pFirstRR;
 710
 711     return ret;
 712
 713 error:
 714     DNS_RRSET_TERMINATE( rr1 );
 715     DNS_RRSET_TERMINATE( rr2 );
 716
 717     DnsRecordListFree( rr1.pFirstRR, DnsFreeRecordList );
 718     DnsRecordListFree( rr2.pFirstRR, DnsFreeRecordList );
 719
 720     return FALSE;
 721 }
 722
 723 /******************************************************************************
 724  * DnsRecordSetCopyEx                      [DNSAPI.@]
 725  *
 726  */
 727 PDNS_RECORD WINAPI DnsRecordSetCopyEx( PDNS_RECORD src_set, DNS_CHARSET in, DNS_CHARSET out )
 728 {
 729     DNS_RRSET dst_set;
 730     DNS_RECORD *src, *dst;
 731
 732     TRACE( "(%p,%d,%d)\n", src_set, in, out );
 733
 734     DNS_RRSET_INIT( dst_set );
 735
 736     for (src = src_set; (src_set = src); src = src_set->pNext)
 737     {
 738         dst = DnsRecordCopyEx( src, in, out );
 739         if (!dst)
 740         {
 741             DNS_RRSET_TERMINATE( dst_set );
 742             DnsRecordListFree( dst_set.pFirstRR, DnsFreeRecordList );
 743             return NULL;
 744         }
 745         DNS_RRSET_ADD( dst_set, dst );
 746     }
 747
 748     DNS_RRSET_TERMINATE( dst_set );
 749     return dst_set.pFirstRR;
 750 }
 751
 752 /******************************************************************************
 753  * DnsRecordSetDetach                      [DNSAPI.@]
 754  *
 755  */
 756 PDNS_RECORD WINAPI DnsRecordSetDetach( PDNS_RECORD set )
 757 {
 758     DNS_RECORD *r, *s;
 759
 760     TRACE( "(%p)\n", set );
 761
 762     for (r = set; (set = r); r = set->pNext)
 763     {
 764         if (r->pNext && !r->pNext->pNext)
 765         {
 766             s = r->pNext;
 767             r->pNext = NULL;
 768             return s;
 769         }
 770     }
 771     return NULL;
 772 }