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 "winnls.h"
  42 #include "windns.h"
  43
  44 #include "dnsapi.h"
  45
  46 WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
  47
  48 const char *dns_type_to_str( unsigned short type )
  49 {
  50     switch (type)
  51     {
  52 #define X(x)    case (x): return #x;
  53     X(DNS_TYPE_ZERO)
  54     X(DNS_TYPE_A)
  55     X(DNS_TYPE_NS)
  56     X(DNS_TYPE_MD)
  57     X(DNS_TYPE_MF)
  58     X(DNS_TYPE_CNAME)
  59     X(DNS_TYPE_SOA)
  60     X(DNS_TYPE_MB)
  61     X(DNS_TYPE_MG)
  62     X(DNS_TYPE_MR)
  63     X(DNS_TYPE_NULL)
  64     X(DNS_TYPE_WKS)
  65     X(DNS_TYPE_PTR)
  66     X(DNS_TYPE_HINFO)
  67     X(DNS_TYPE_MINFO)
  68     X(DNS_TYPE_MX)
  69     X(DNS_TYPE_TEXT)
  70     X(DNS_TYPE_RP)
  71     X(DNS_TYPE_AFSDB)
  72     X(DNS_TYPE_X25)
  73     X(DNS_TYPE_ISDN)
  74     X(DNS_TYPE_RT)
  75     X(DNS_TYPE_NSAP)
  76     X(DNS_TYPE_NSAPPTR)
  77     X(DNS_TYPE_SIG)
  78     X(DNS_TYPE_KEY)
  79     X(DNS_TYPE_PX)
  80     X(DNS_TYPE_GPOS)
  81     X(DNS_TYPE_AAAA)
  82     X(DNS_TYPE_LOC)
  83     X(DNS_TYPE_NXT)
  84     X(DNS_TYPE_EID)
  85     X(DNS_TYPE_NIMLOC)
  86     X(DNS_TYPE_SRV)
  87     X(DNS_TYPE_ATMA)
  88     X(DNS_TYPE_NAPTR)
  89     X(DNS_TYPE_KX)
  90     X(DNS_TYPE_CERT)
  91     X(DNS_TYPE_A6)
  92     X(DNS_TYPE_DNAME)
  93     X(DNS_TYPE_SINK)
  94     X(DNS_TYPE_OPT)
  95     X(DNS_TYPE_UINFO)
  96     X(DNS_TYPE_UID)
  97     X(DNS_TYPE_GID)
  98     X(DNS_TYPE_UNSPEC)
  99     X(DNS_TYPE_ADDRS)
 100     X(DNS_TYPE_TKEY)
 101     X(DNS_TYPE_TSIG)
 102     X(DNS_TYPE_IXFR)
 103     X(DNS_TYPE_AXFR)
 104     X(DNS_TYPE_MAILB)
 105     X(DNS_TYPE_MAILA)
 106     X(DNS_TYPE_ANY)
 107     X(DNS_TYPE_WINS)
 108     X(DNS_TYPE_WINSR)
 109 #undef X
 110     default: { static char tmp[7]; sprintf( tmp, "0x%04x", type ); return tmp; }
 111     }
 112 }
 113
 114 static int dns_strcmpX( LPCVOID str1, LPCVOID str2, BOOL wide )
 115 {
 116     if (wide)
 117         return lstrcmpiW( str1, str2 );
 118     else
 119         return lstrcmpiA( str1, str2 );
 120 }
 121
 122 /******************************************************************************
 123  * DnsRecordCompare                        [DNSAPI.@]
 124  *
 125  */
 126 BOOL WINAPI DnsRecordCompare( PDNS_RECORD r1, PDNS_RECORD r2 )
 127 {
 128     BOOL wide;
 129     unsigned int i;
 130
 131     TRACE( "(%p,%p)\n", r1, r2 );
 132
 133     if (r1->wType       != r2->wType       ||
 134         r1->wDataLength != r2->wDataLength ||
 135         r1->Flags.DW    != r2->Flags.DW    ||
 136         r1->dwReserved  != r2->dwReserved) return FALSE;
 137
 138     wide = (r1->Flags.S.CharSet == DnsCharSetUnicode) ? TRUE : FALSE;
 139     if (dns_strcmpX( r1->pName, r2->pName, wide )) return FALSE;
 140
 141     switch (r1->wType)
 142     {
 143     case DNS_TYPE_A:
 144     {
 145         if (r1->Data.A.IpAddress != r2->Data.A.IpAddress) return FALSE;
 146         break;
 147     }
 148     case DNS_TYPE_SOA:
 149     {
 150         if (r1->Data.SOA.dwSerialNo   != r2->Data.SOA.dwSerialNo ||
 151             r1->Data.SOA.dwRefresh    != r2->Data.SOA.dwRefresh  ||
 152             r1->Data.SOA.dwRetry      != r2->Data.SOA.dwRetry    ||
 153             r1->Data.SOA.dwExpire     != r2->Data.SOA.dwExpire   ||
 154             r1->Data.SOA.dwDefaultTtl != r2->Data.SOA.dwDefaultTtl)
 155             return FALSE;
 156         if (dns_strcmpX( r1->Data.SOA.pNamePrimaryServer,
 157                          r2->Data.SOA.pNamePrimaryServer, wide ) ||
 158             dns_strcmpX( r1->Data.SOA.pNameAdministrator,
 159                          r2->Data.SOA.pNameAdministrator, wide ))
 160             return FALSE;
 161         break;
 162     }
 163     case DNS_TYPE_PTR:
 164     case DNS_TYPE_NS:
 165     case DNS_TYPE_CNAME:
 166     case DNS_TYPE_MB:
 167     case DNS_TYPE_MD:
 168     case DNS_TYPE_MF:
 169     case DNS_TYPE_MG:
 170     case DNS_TYPE_MR:
 171     {
 172         if (dns_strcmpX( r1->Data.PTR.pNameHost,
 173                          r2->Data.PTR.pNameHost, wide )) return FALSE;
 174         break;
 175     }
 176     case DNS_TYPE_MINFO:
 177     case DNS_TYPE_RP:
 178     {
 179         if (dns_strcmpX( r1->Data.MINFO.pNameMailbox,
 180                          r2->Data.MINFO.pNameMailbox, wide ) ||
 181             dns_strcmpX( r1->Data.MINFO.pNameErrorsMailbox,
 182                          r2->Data.MINFO.pNameErrorsMailbox, wide ))
 183             return FALSE;
 184         break;
 185     }
 186     case DNS_TYPE_MX:
 187     case DNS_TYPE_AFSDB:
 188     case DNS_TYPE_RT:
 189     {
 190         if (r1->Data.MX.wPreference != r2->Data.MX.wPreference)
 191             return FALSE;
 192         if (dns_strcmpX( r1->Data.MX.pNameExchange,
 193                          r2->Data.MX.pNameExchange, wide ))
 194             return FALSE;
 195         break;
 196     }
 197     case DNS_TYPE_HINFO:
 198     case DNS_TYPE_ISDN:
 199     case DNS_TYPE_TEXT:
 200     case DNS_TYPE_X25:
 201     {
 202         if (r1->Data.TXT.dwStringCount != r2->Data.TXT.dwStringCount)
 203             return FALSE;
 204         for (i = 0; i < r1->Data.TXT.dwStringCount; i++)
 205         {
 206             if (dns_strcmpX( r1->Data.TXT.pStringArray[i],
 207                              r2->Data.TXT.pStringArray[i], wide ))
 208                 return FALSE;
 209         }
 210         break;
 211     }
 212     case DNS_TYPE_NULL:
 213     {
 214         if (r1->Data.Null.dwByteCount != r2->Data.Null.dwByteCount)
 215             return FALSE;
 216         if (memcmp( r1->Data.Null.Data,
 217                     r2->Data.Null.Data, r1->Data.Null.dwByteCount ))
 218             return FALSE;
 219         break;
 220     }
 221     case DNS_TYPE_AAAA:
 222     {
 223         for (i = 0; i < sizeof(IP6_ADDRESS)/sizeof(DWORD); i++)
 224         {
 225             if (r1->Data.AAAA.Ip6Address.IP6Dword[i] !=
 226                 r2->Data.AAAA.Ip6Address.IP6Dword[i]) return FALSE;
 227         }
 228         break;
 229     }
 230     case DNS_TYPE_KEY:
 231     {
 232         if (r1->Data.KEY.wFlags      != r2->Data.KEY.wFlags      ||
 233             r1->Data.KEY.chProtocol  != r2->Data.KEY.chProtocol  ||
 234             r1->Data.KEY.chAlgorithm != r2->Data.KEY.chAlgorithm)
 235             return FALSE;
 236         if (memcmp( r1->Data.KEY.Key, r2->Data.KEY.Key,
 237                     r1->wDataLength - sizeof(DNS_KEY_DATA) + 1 ))
 238             return FALSE;
 239         break;
 240     }
 241     case DNS_TYPE_SIG:
 242     {
 243         if (dns_strcmpX( r1->Data.SIG.pNameSigner,
 244                          r2->Data.SIG.pNameSigner, wide ))
 245             return FALSE;
 246         if (r1->Data.SIG.wTypeCovered  != r2->Data.SIG.wTypeCovered  ||
 247             r1->Data.SIG.chAlgorithm   != r2->Data.SIG.chAlgorithm   ||
 248             r1->Data.SIG.chLabelCount  != r2->Data.SIG.chLabelCount  ||
 249             r1->Data.SIG.dwOriginalTtl != r2->Data.SIG.dwOriginalTtl ||
 250             r1->Data.SIG.dwExpiration  != r2->Data.SIG.dwExpiration  ||
 251             r1->Data.SIG.dwTimeSigned  != r2->Data.SIG.dwTimeSigned  ||
 252             r1->Data.SIG.wKeyTag       != r2->Data.SIG.wKeyTag)
 253             return FALSE;
 254         if (memcmp( r1->Data.SIG.Signature, r2->Data.SIG.Signature,
 255                     r1->wDataLength - sizeof(DNS_SIG_DATAA) + 1 ))
 256             return FALSE;
 257         break;
 258     }
 259     case DNS_TYPE_ATMA:
 260     {
 261         if (r1->Data.ATMA.AddressType != r2->Data.ATMA.AddressType)
 262             return FALSE;
 263         for (i = 0; i < DNS_ATMA_MAX_ADDR_LENGTH; i++)
 264         {
 265             if (r1->Data.ATMA.Address[i] != r2->Data.ATMA.Address[i])
 266                 return FALSE;
 267         }
 268         break;
 269     }
 270     case DNS_TYPE_NXT:
 271     {
 272         if (dns_strcmpX( r1->Data.NXT.pNameNext,
 273                          r2->Data.NXT.pNameNext, wide )) return FALSE;
 274         if (r1->Data.NXT.wNumTypes != r2->Data.NXT.wNumTypes) return FALSE;
 275         if (memcmp( r1->Data.NXT.wTypes, r2->Data.NXT.wTypes,
 276                     r1->wDataLength - sizeof(DNS_NXT_DATAA) + sizeof(WORD) ))
 277             return FALSE;
 278         break;
 279     }
 280     case DNS_TYPE_SRV:
 281     {
 282         if (dns_strcmpX( r1->Data.SRV.pNameTarget,
 283                          r2->Data.SRV.pNameTarget, wide )) return FALSE;
 284         if (r1->Data.SRV.wPriority != r2->Data.SRV.wPriority ||
 285             r1->Data.SRV.wWeight   != r2->Data.SRV.wWeight   ||
 286             r1->Data.SRV.wPort     != r2->Data.SRV.wPort)
 287             return FALSE;
 288         break;
 289     }
 290     case DNS_TYPE_TKEY:
 291     {
 292         if (dns_strcmpX( r1->Data.TKEY.pNameAlgorithm,
 293                          r2->Data.TKEY.pNameAlgorithm, wide ))
 294             return FALSE;
 295         if (r1->Data.TKEY.dwCreateTime    != r2->Data.TKEY.dwCreateTime     ||
 296             r1->Data.TKEY.dwExpireTime    != r2->Data.TKEY.dwExpireTime     ||
 297             r1->Data.TKEY.wMode           != r2->Data.TKEY.wMode            ||
 298             r1->Data.TKEY.wError          != r2->Data.TKEY.wError           ||
 299             r1->Data.TKEY.wKeyLength      != r2->Data.TKEY.wKeyLength       ||
 300             r1->Data.TKEY.wOtherLength    != r2->Data.TKEY.wOtherLength     ||
 301             r1->Data.TKEY.cAlgNameLength  != r2->Data.TKEY.cAlgNameLength   ||
 302             r1->Data.TKEY.bPacketPointers != r2->Data.TKEY.bPacketPointers)
 303             return FALSE;
 304
 305         /* FIXME: ignoring pAlgorithmPacket field */
 306         if (memcmp( r1->Data.TKEY.pKey, r2->Data.TKEY.pKey,
 307                     r1->Data.TKEY.wKeyLength ) ||
 308             memcmp( r1->Data.TKEY.pOtherData, r2->Data.TKEY.pOtherData,
 309                     r1->Data.TKEY.wOtherLength )) return FALSE;
 310         break;
 311     }
 312     case DNS_TYPE_TSIG:
 313     {
 314         if (dns_strcmpX( r1->Data.TSIG.pNameAlgorithm,
 315                          r2->Data.TSIG.pNameAlgorithm, wide ))
 316             return FALSE;
 317         if (r1->Data.TSIG.i64CreateTime   != r2->Data.TSIG.i64CreateTime    ||
 318             r1->Data.TSIG.wFudgeTime      != r2->Data.TSIG.wFudgeTime       ||
 319             r1->Data.TSIG.wOriginalXid    != r2->Data.TSIG.wOriginalXid     ||
 320             r1->Data.TSIG.wError          != r2->Data.TSIG.wError           ||
 321             r1->Data.TSIG.wSigLength      != r2->Data.TSIG.wSigLength       ||
 322             r1->Data.TSIG.wOtherLength    != r2->Data.TSIG.wOtherLength     ||
 323             r1->Data.TSIG.cAlgNameLength  != r2->Data.TSIG.cAlgNameLength   ||
 324             r1->Data.TSIG.bPacketPointers != r2->Data.TSIG.bPacketPointers)
 325             return FALSE;
 326
 327         /* FIXME: ignoring pAlgorithmPacket field */
 328         if (memcmp( r1->Data.TSIG.pSignature, r2->Data.TSIG.pSignature,
 329                     r1->Data.TSIG.wSigLength ) ||
 330             memcmp( r1->Data.TSIG.pOtherData, r2->Data.TSIG.pOtherData,
 331                     r1->Data.TSIG.wOtherLength )) return FALSE;
 332         break;
 333     }
 334     case DNS_TYPE_WINS:
 335     {
 336         if (r1->Data.WINS.dwMappingFlag    != r2->Data.WINS.dwMappingFlag   ||
 337             r1->Data.WINS.dwLookupTimeout  != r2->Data.WINS.dwLookupTimeout ||
 338             r1->Data.WINS.dwCacheTimeout   != r2->Data.WINS.dwCacheTimeout  ||
 339             r1->Data.WINS.cWinsServerCount != r2->Data.WINS.cWinsServerCount)
 340             return FALSE;
 341         if (memcmp( r1->Data.WINS.WinsServers, r2->Data.WINS.WinsServers,
 342                     r1->wDataLength - sizeof(DNS_WINS_DATA) + sizeof(IP4_ADDRESS) ))
 343             return FALSE;
 344         break;
 345     }
 346     case DNS_TYPE_WINSR:
 347     {
 348         if (r1->Data.WINSR.dwMappingFlag   != r2->Data.WINSR.dwMappingFlag   ||
 349             r1->Data.WINSR.dwLookupTimeout != r2->Data.WINSR.dwLookupTimeout ||
 350             r1->Data.WINSR.dwCacheTimeout  != r2->Data.WINSR.dwCacheTimeout)
 351             return FALSE;
 352         if (dns_strcmpX( r1->Data.WINSR.pNameResultDomain,
 353                          r2->Data.WINSR.pNameResultDomain, wide ))
 354             return FALSE;
 355         break;
 356     }
 357     default:
 358         FIXME( "unknown type: %s\n", dns_type_to_str( r1->wType ) );
 359         return FALSE;
 360     }
 361     return TRUE;
 362 }
 363
 364 static LPVOID dns_strcpyX( LPCVOID src, DNS_CHARSET in, DNS_CHARSET out )
 365 {
 366     switch (in)
 367     {
 368     case DnsCharSetUnicode:
 369     {
 370         switch (out)
 371         {
 372         case DnsCharSetUnicode: return dns_strdup_w( src );
 373         case DnsCharSetUtf8:    return dns_strdup_wu( src );
 374         case DnsCharSetAnsi:    return dns_strdup_wa( src );
 375         default:
 376             WARN( "unhandled target charset: %d\n", out );
 377             break;
 378         }
 379         break;
 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         break;
 392     case DnsCharSetAnsi:
 393         switch (out)
 394         {
 395         case DnsCharSetUnicode: return dns_strdup_aw( src );
 396         case DnsCharSetUtf8:    return dns_strdup_au( src );
 397         case DnsCharSetAnsi:    return dns_strdup_a( src );
 398         default:
 399             WARN( "unhandled target charset: %d\n", out );
 400             break;
 401         }
 402         break;
 403     default:
 404         WARN( "unhandled source charset: %d\n", in );
 405         break;
 406     }
 407     return NULL;
 408 }
 409
 410 /******************************************************************************
 411  * DnsRecordCopyEx                         [DNSAPI.@]
 412  *
 413  */
 414 PDNS_RECORD WINAPI DnsRecordCopyEx( PDNS_RECORD src, DNS_CHARSET in, DNS_CHARSET out )
 415 {
 416     DNS_RECORD *dst;
 417     unsigned int i, size;
 418
 419     TRACE( "(%p,%d,%d)\n", src, in, out );
 420
 421     size = FIELD_OFFSET(DNS_RECORD, Data) + src->wDataLength;
 422     dst = heap_alloc_zero( size );
 423     if (!dst) return NULL;
 424
 425     memcpy( dst, src, size );
 426
 427     if (src->Flags.S.CharSet == DnsCharSetUtf8 ||
 428         src->Flags.S.CharSet == DnsCharSetAnsi ||
 429         src->Flags.S.CharSet == DnsCharSetUnicode) in = src->Flags.S.CharSet;
 430
 431     dst->Flags.S.CharSet = out;
 432     dst->pName = dns_strcpyX( src->pName, in, out );
 433     if (!dst->pName) goto error;
 434
 435     switch (src->wType)
 436     {
 437     case DNS_TYPE_HINFO:
 438     case DNS_TYPE_ISDN:
 439     case DNS_TYPE_TEXT:
 440     case DNS_TYPE_X25:
 441     {
 442         for (i = 0; i < src->Data.TXT.dwStringCount; i++)
 443         {
 444             dst->Data.TXT.pStringArray[i] =
 445                 dns_strcpyX( src->Data.TXT.pStringArray[i], in, out );
 446
 447             if (!dst->Data.TXT.pStringArray[i])
 448             {
 449                 while (i > 0) heap_free( dst->Data.TXT.pStringArray[--i] );
 450                 goto error;
 451             }
 452         }
 453         break;
 454     }
 455     case DNS_TYPE_MINFO:
 456     case DNS_TYPE_RP:
 457     {
 458         dst->Data.MINFO.pNameMailbox =
 459             dns_strcpyX( src->Data.MINFO.pNameMailbox, in, out );
 460         if (!dst->Data.MINFO.pNameMailbox) goto error;
 461
 462         dst->Data.MINFO.pNameErrorsMailbox =
 463             dns_strcpyX( src->Data.MINFO.pNameErrorsMailbox, in, out );
 464         if (!dst->Data.MINFO.pNameErrorsMailbox)
 465         {
 466             heap_free( dst->Data.MINFO.pNameMailbox );
 467             goto error;
 468         }
 469         break;
 470     }
 471     case DNS_TYPE_AFSDB:
 472     case DNS_TYPE_RT:
 473     case DNS_TYPE_MX:
 474     {
 475         dst->Data.MX.pNameExchange =
 476             dns_strcpyX( src->Data.MX.pNameExchange, in, out );
 477         if (!dst->Data.MX.pNameExchange) goto error;
 478         break;
 479     }
 480     case DNS_TYPE_NXT:
 481     {
 482         dst->Data.NXT.pNameNext =
 483             dns_strcpyX( src->Data.NXT.pNameNext, in, out );
 484         if (!dst->Data.NXT.pNameNext) goto error;
 485         break;
 486     }
 487     case DNS_TYPE_CNAME:
 488     case DNS_TYPE_MB:
 489     case DNS_TYPE_MD:
 490     case DNS_TYPE_MF:
 491     case DNS_TYPE_MG:
 492     case DNS_TYPE_MR:
 493     case DNS_TYPE_NS:
 494     case DNS_TYPE_PTR:
 495     {
 496         dst->Data.PTR.pNameHost =
 497             dns_strcpyX( src->Data.PTR.pNameHost, in, out );
 498         if (!dst->Data.PTR.pNameHost) goto error;
 499         break;
 500     }
 501     case DNS_TYPE_SIG:
 502     {
 503         dst->Data.SIG.pNameSigner =
 504             dns_strcpyX( src->Data.SIG.pNameSigner, in, out );
 505         if (!dst->Data.SIG.pNameSigner) goto error;
 506         break;
 507     }
 508     case DNS_TYPE_SOA:
 509     {
 510         dst->Data.SOA.pNamePrimaryServer =
 511             dns_strcpyX( src->Data.SOA.pNamePrimaryServer, in, out );
 512         if (!dst->Data.SOA.pNamePrimaryServer) goto error;
 513
 514         dst->Data.SOA.pNameAdministrator =
 515             dns_strcpyX( src->Data.SOA.pNameAdministrator, in, out );
 516         if (!dst->Data.SOA.pNameAdministrator)
 517         {
 518             heap_free( dst->Data.SOA.pNamePrimaryServer );
 519             goto error;
 520         }
 521         break;
 522     }
 523     case DNS_TYPE_SRV:
 524     {
 525         dst->Data.SRV.pNameTarget =
 526             dns_strcpyX( src->Data.SRV.pNameTarget, in, out );
 527         if (!dst->Data.SRV.pNameTarget) goto error;
 528         break;
 529     }
 530     default:
 531         break;
 532     }
 533     return dst;
 534
 535 error:
 536     heap_free( dst->pName );
 537     heap_free( dst );
 538     return NULL;
 539 }
 540
 541 /******************************************************************************
 542  * DnsRecordListFree                       [DNSAPI.@]
 543  *
 544  */
 545 VOID WINAPI DnsRecordListFree( PDNS_RECORD list, DNS_FREE_TYPE type )
 546 {
 547     DNS_RECORD *r, *next;
 548     unsigned int i;
 549
 550     TRACE( "(%p,%d)\n", list, type );
 551
 552     if (!list) return;
 553
 554     switch (type)
 555     {
 556     case DnsFreeRecordList:
 557     {
 558         for (r = list; (list = r); r = next)
 559         {
 560             heap_free( r->pName );
 561
 562             switch (r->wType)
 563             {
 564             case DNS_TYPE_HINFO:
 565             case DNS_TYPE_ISDN:
 566             case DNS_TYPE_TEXT:
 567             case DNS_TYPE_X25:
 568             {
 569                 for (i = 0; i < r->Data.TXT.dwStringCount; i++)
 570                     heap_free( r->Data.TXT.pStringArray[i] );
 571
 572                 break;
 573             }
 574             case DNS_TYPE_MINFO:
 575             case DNS_TYPE_RP:
 576             {
 577                 heap_free( r->Data.MINFO.pNameMailbox );
 578                 heap_free( r->Data.MINFO.pNameErrorsMailbox );
 579                 break;
 580             }
 581             case DNS_TYPE_AFSDB:
 582             case DNS_TYPE_RT:
 583             case DNS_TYPE_MX:
 584             {
 585                 heap_free( r->Data.MX.pNameExchange );
 586                 break;
 587             }
 588             case DNS_TYPE_NXT:
 589             {
 590                 heap_free( r->Data.NXT.pNameNext );
 591                 break;
 592             }
 593             case DNS_TYPE_CNAME:
 594             case DNS_TYPE_MB:
 595             case DNS_TYPE_MD:
 596             case DNS_TYPE_MF:
 597             case DNS_TYPE_MG:
 598             case DNS_TYPE_MR:
 599             case DNS_TYPE_NS:
 600             case DNS_TYPE_PTR:
 601             {
 602                 heap_free( r->Data.PTR.pNameHost );
 603                 break;
 604             }
 605             case DNS_TYPE_SIG:
 606             {
 607                 heap_free( r->Data.SIG.pNameSigner );
 608                 break;
 609             }
 610             case DNS_TYPE_SOA:
 611             {
 612                 heap_free( r->Data.SOA.pNamePrimaryServer );
 613                 heap_free( r->Data.SOA.pNameAdministrator );
 614                 break;
 615             }
 616             case DNS_TYPE_SRV:
 617             {
 618                 heap_free( r->Data.SRV.pNameTarget );
 619                 break;
 620             }
 621             default:
 622                 break;
 623             }
 624
 625             next = r->pNext;
 626             heap_free( r );
 627         }
 628         break;
 629     }
 630     case DnsFreeFlat:
 631     case DnsFreeParsedMessageFields:
 632     {
 633         FIXME( "unhandled free type: %d\n", type );
 634         break;
 635     }
 636     default:
 637         WARN( "unknown free type: %d\n", type );
 638         break;
 639     }
 640 }
 641
 642 /******************************************************************************
 643  * DnsFree                     [DNSAPI.@]
 644  *
 645  */
 646 void WINAPI DnsFree( PVOID data, DNS_FREE_TYPE type )
 647 {
 648     DnsRecordListFree( data, type );
 649 }
 650
 651 /******************************************************************************
 652  * DnsRecordSetCompare                     [DNSAPI.@]
 653  *
 654  */
 655 BOOL WINAPI DnsRecordSetCompare( PDNS_RECORD set1, PDNS_RECORD set2,
 656                                  PDNS_RECORD *diff1, PDNS_RECORD *diff2 )
 657 {
 658     BOOL ret = TRUE;
 659     DNS_RECORD *r, *t, *u;
 660     DNS_RRSET rr1, rr2;
 661
 662     TRACE( "(%p,%p,%p,%p)\n", set1, set2, diff1, diff2 );
 663
 664     if (!set1 && !set2) return FALSE;
 665
 666     if (diff1) *diff1 = NULL;
 667     if (diff2) *diff2 = NULL;
 668
 669     if (set1 && !set2)
 670     {
 671         if (diff1) *diff1 = DnsRecordSetCopyEx( set1, 0, set1->Flags.S.CharSet );
 672         return FALSE;
 673     }
 674     if (!set1 && set2)
 675     {
 676         if (diff2) *diff2 = DnsRecordSetCopyEx( set2, 0, set2->Flags.S.CharSet );
 677         return FALSE;
 678     }
 679
 680     DNS_RRSET_INIT( rr1 );
 681     DNS_RRSET_INIT( rr2 );
 682
 683     for (r = set1; r; r = r->pNext)
 684     {
 685         for (t = set2; t; t = t->pNext)
 686         {
 687             u = DnsRecordCopyEx( r, r->Flags.S.CharSet, t->Flags.S.CharSet );
 688             if (!u) goto error;
 689
 690             if (!DnsRecordCompare( t, u ))
 691             {
 692                 DNS_RRSET_ADD( rr1, u );
 693                 ret = FALSE;
 694             }
 695             else DnsRecordListFree( u, DnsFreeRecordList );
 696         }
 697     }
 698
 699     for (t = set2; t; t = t->pNext)
 700     {
 701         for (r = set1; r; r = r->pNext)
 702         {
 703             u = DnsRecordCopyEx( t, t->Flags.S.CharSet, r->Flags.S.CharSet );
 704             if (!u) goto error;
 705
 706             if (!DnsRecordCompare( r, u ))
 707             {
 708                 DNS_RRSET_ADD( rr2, u );
 709                 ret = FALSE;
 710             }
 711             else DnsRecordListFree( u, DnsFreeRecordList );
 712         }
 713     }
 714
 715     DNS_RRSET_TERMINATE( rr1 );
 716     DNS_RRSET_TERMINATE( rr2 );
 717
 718     if (diff1) *diff1 = rr1.pFirstRR;
 719     else DnsRecordListFree( rr1.pFirstRR, DnsFreeRecordList );
 720
 721     if (diff2) *diff2 = rr2.pFirstRR;
 722     else DnsRecordListFree( rr2.pFirstRR, DnsFreeRecordList );
 723
 724     return ret;
 725
 726 error:
 727     DNS_RRSET_TERMINATE( rr1 );
 728     DNS_RRSET_TERMINATE( rr2 );
 729
 730     DnsRecordListFree( rr1.pFirstRR, DnsFreeRecordList );
 731     DnsRecordListFree( rr2.pFirstRR, DnsFreeRecordList );
 732
 733     return FALSE;
 734 }
 735
 736 /******************************************************************************
 737  * DnsRecordSetCopyEx                      [DNSAPI.@]
 738  *
 739  */
 740 PDNS_RECORD WINAPI DnsRecordSetCopyEx( PDNS_RECORD src_set, DNS_CHARSET in, DNS_CHARSET out )
 741 {
 742     DNS_RRSET dst_set;
 743     DNS_RECORD *src, *dst;
 744
 745     TRACE( "(%p,%d,%d)\n", src_set, in, out );
 746
 747     DNS_RRSET_INIT( dst_set );
 748
 749     for (src = src_set; (src_set = src); src = src_set->pNext)
 750     {
 751         dst = DnsRecordCopyEx( src, in, out );
 752         if (!dst)
 753         {
 754             DNS_RRSET_TERMINATE( dst_set );
 755             DnsRecordListFree( dst_set.pFirstRR, DnsFreeRecordList );
 756             return NULL;
 757         }
 758         DNS_RRSET_ADD( dst_set, dst );
 759     }
 760
 761     DNS_RRSET_TERMINATE( dst_set );
 762     return dst_set.pFirstRR;
 763 }
 764
 765 /******************************************************************************
 766  * DnsRecordSetDetach                      [DNSAPI.@]
 767  *
 768  */
 769 PDNS_RECORD WINAPI DnsRecordSetDetach( PDNS_RECORD set )
 770 {
 771     DNS_RECORD *r, *s;
 772
 773     TRACE( "(%p)\n", set );
 774
 775     for (r = set; (set = r); r = set->pNext)
 776     {
 777         if (r->pNext && !r->pNext->pNext)
 778         {
 779             s = r->pNext;
 780             r->pNext = NULL;
 781             return s;
 782         }
 783     }
 784     return NULL;
 785 }