401 lines
12 KiB
C
401 lines
12 KiB
C
/*
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* DNS support
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*
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* Copyright (C) 2006 Hans Leidekker
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "winnls.h"
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#include "windns.h"
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#include "nb30.h"
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#include "ws2def.h"
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#include "wine/debug.h"
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#include "dnsapi.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
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#define DEFAULT_TTL 1200
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static DNS_STATUS do_query_netbios( PCSTR name, DNS_RECORDA **recp )
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{
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NCB ncb;
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UCHAR ret;
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DNS_RRSET rrset;
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FIND_NAME_BUFFER *buffer;
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FIND_NAME_HEADER *header;
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DNS_RECORDA *record = NULL;
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unsigned int i, len;
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DNS_STATUS status = ERROR_INVALID_NAME;
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len = strlen( name );
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if (len >= NCBNAMSZ) return DNS_ERROR_RCODE_NAME_ERROR;
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DNS_RRSET_INIT( rrset );
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memset( &ncb, 0, sizeof(ncb) );
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ncb.ncb_command = NCBFINDNAME;
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memset( ncb.ncb_callname, ' ', sizeof(ncb.ncb_callname) );
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memcpy( ncb.ncb_callname, name, len );
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ncb.ncb_callname[NCBNAMSZ - 1] = '\0';
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ret = Netbios( &ncb );
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if (ret != NRC_GOODRET) return ERROR_INVALID_NAME;
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header = (FIND_NAME_HEADER *)ncb.ncb_buffer;
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buffer = (FIND_NAME_BUFFER *)((char *)header + sizeof(FIND_NAME_HEADER));
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for (i = 0; i < header->node_count; i++)
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{
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record = calloc( 1, sizeof(DNS_RECORDA) );
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if (!record)
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{
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status = ERROR_NOT_ENOUGH_MEMORY;
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goto exit;
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}
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else
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{
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record->pName = strdup_u( name );
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if (!record->pName)
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{
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status = ERROR_NOT_ENOUGH_MEMORY;
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goto exit;
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}
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record->wType = DNS_TYPE_A;
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record->Flags.S.Section = DnsSectionAnswer;
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record->Flags.S.CharSet = DnsCharSetUtf8;
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record->dwTtl = DEFAULT_TTL;
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/* FIXME: network byte order? */
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record->Data.A.IpAddress = *(DWORD *)((char *)buffer[i].destination_addr + 2);
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DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
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}
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}
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status = ERROR_SUCCESS;
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exit:
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DNS_RRSET_TERMINATE( rrset );
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if (status != ERROR_SUCCESS)
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DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
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else
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*recp = (DNS_RECORDA *)rrset.pFirstRR;
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return status;
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}
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static const char *debugstr_query_request(const DNS_QUERY_REQUEST *req)
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{
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if (!req) return "(null)";
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return wine_dbg_sprintf("{%lu %s %s %I64x %p %lu %p %p}", req->Version,
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debugstr_w(req->QueryName), debugstr_type(req->QueryType),
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req->QueryOptions, req->pDnsServerList, req->InterfaceIndex,
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req->pQueryCompletionCallback, req->pQueryContext);
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}
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/******************************************************************************
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* DnsQueryEx [DNSAPI.@]
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*
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*/
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DNS_STATUS WINAPI DnsQueryEx(DNS_QUERY_REQUEST *request, DNS_QUERY_RESULT *result, DNS_QUERY_CANCEL *cancel)
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{
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FIXME("(%s, %p, %p)\n", debugstr_query_request(request), result, cancel);
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return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
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}
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/******************************************************************************
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* DnsQuery_A [DNSAPI.@]
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*
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*/
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DNS_STATUS WINAPI DnsQuery_A( const char *name, WORD type, DWORD options, void *servers, DNS_RECORDA **result,
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void **reserved )
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{
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WCHAR *nameW;
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DNS_RECORDW *resultW;
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DNS_STATUS status;
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TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_a(name), debugstr_type( type ),
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options, servers, result, reserved );
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if (!name || !result)
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return ERROR_INVALID_PARAMETER;
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nameW = strdup_aw( name );
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if (!nameW) return ERROR_NOT_ENOUGH_MEMORY;
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status = DnsQuery_W( nameW, type, options, servers, &resultW, reserved );
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if (status == ERROR_SUCCESS)
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{
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*result = (DNS_RECORDA *)DnsRecordSetCopyEx(
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(DNS_RECORD *)resultW, DnsCharSetUnicode, DnsCharSetAnsi );
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if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
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DnsRecordListFree( (DNS_RECORD *)resultW, DnsFreeRecordList );
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}
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free( nameW );
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return status;
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}
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/******************************************************************************
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* DnsQuery_UTF8 [DNSAPI.@]
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*
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*/
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DNS_STATUS WINAPI DnsQuery_UTF8( const char *name, WORD type, DWORD options, void *servers, DNS_RECORDA **result,
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void **reserved )
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{
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DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
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unsigned char answer[4096];
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DWORD len = sizeof(answer);
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struct query_params query_params = { name, type, options, answer, &len };
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TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_a(name), debugstr_type( type ),
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options, servers, result, reserved );
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if (!name || !result)
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return ERROR_INVALID_PARAMETER;
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if ((ret = RESOLV_CALL( set_serverlist, servers ))) return ret;
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ret = RESOLV_CALL( query, &query_params );
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if (!ret)
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{
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DNS_MESSAGE_BUFFER *buffer = (DNS_MESSAGE_BUFFER *)answer;
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if (len < sizeof(buffer->MessageHead)) return DNS_ERROR_BAD_PACKET;
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DNS_BYTE_FLIP_HEADER_COUNTS( &buffer->MessageHead );
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switch (buffer->MessageHead.ResponseCode)
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{
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case DNS_RCODE_NOERROR: ret = DnsExtractRecordsFromMessage_UTF8( buffer, len, result ); break;
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case DNS_RCODE_FORMERR: ret = DNS_ERROR_RCODE_FORMAT_ERROR; break;
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case DNS_RCODE_SERVFAIL: ret = DNS_ERROR_RCODE_SERVER_FAILURE; break;
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case DNS_RCODE_NXDOMAIN: ret = DNS_ERROR_RCODE_NAME_ERROR; break;
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case DNS_RCODE_NOTIMPL: ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED; break;
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case DNS_RCODE_REFUSED: ret = DNS_ERROR_RCODE_REFUSED; break;
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case DNS_RCODE_YXDOMAIN: ret = DNS_ERROR_RCODE_YXDOMAIN; break;
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case DNS_RCODE_YXRRSET: ret = DNS_ERROR_RCODE_YXRRSET; break;
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case DNS_RCODE_NXRRSET: ret = DNS_ERROR_RCODE_NXRRSET; break;
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case DNS_RCODE_NOTAUTH: ret = DNS_ERROR_RCODE_NOTAUTH; break;
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case DNS_RCODE_NOTZONE: ret = DNS_ERROR_RCODE_NOTZONE; break;
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default: ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED; break;
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}
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}
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if (ret == DNS_ERROR_RCODE_NAME_ERROR && type == DNS_TYPE_A &&
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!(options & DNS_QUERY_NO_NETBT))
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{
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TRACE( "dns lookup failed, trying netbios query\n" );
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ret = do_query_netbios( name, result );
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}
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return ret;
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}
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/******************************************************************************
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* DnsQuery_W [DNSAPI.@]
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*
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*/
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DNS_STATUS WINAPI DnsQuery_W( const WCHAR *name, WORD type, DWORD options, void *servers, DNS_RECORDW **result,
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void **reserved )
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{
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char *nameU;
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DNS_RECORDA *resultA;
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DNS_STATUS status;
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TRACE( "(%s, %s, %#lx, %p, %p, %p)\n", debugstr_w(name), debugstr_type( type ),
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options, servers, result, reserved );
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if (!name || !result)
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return ERROR_INVALID_PARAMETER;
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nameU = strdup_wu( name );
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if (!nameU) return ERROR_NOT_ENOUGH_MEMORY;
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status = DnsQuery_UTF8( nameU, type, options, servers, &resultA, reserved );
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if (status == ERROR_SUCCESS)
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{
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*result = (DNS_RECORDW *)DnsRecordSetCopyEx(
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(DNS_RECORD *)resultA, DnsCharSetUtf8, DnsCharSetUnicode );
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if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
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DnsRecordListFree( (DNS_RECORD *)resultA, DnsFreeRecordList );
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}
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free( nameU );
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return status;
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}
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static DNS_STATUS get_hostname_a( COMPUTER_NAME_FORMAT format, PSTR buffer, PDWORD len )
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{
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char name[256];
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DWORD size = ARRAY_SIZE(name);
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if (!GetComputerNameExA( format, name, &size ))
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return DNS_ERROR_NAME_DOES_NOT_EXIST;
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if (!buffer || (size = lstrlenA( name ) + 1) > *len)
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{
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*len = size;
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return ERROR_INSUFFICIENT_BUFFER;
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}
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lstrcpyA( buffer, name );
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return ERROR_SUCCESS;
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}
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static DNS_STATUS get_hostname_w( COMPUTER_NAME_FORMAT format, PWSTR buffer, PDWORD len )
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{
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WCHAR name[256];
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DWORD size = ARRAY_SIZE(name);
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if (!GetComputerNameExW( format, name, &size ))
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return DNS_ERROR_NAME_DOES_NOT_EXIST;
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if (!buffer || (size = lstrlenW( name ) + 1) > *len)
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{
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*len = size;
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return ERROR_INSUFFICIENT_BUFFER;
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}
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lstrcpyW( buffer, name );
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return ERROR_SUCCESS;
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}
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static DNS_STATUS get_dns_server_list( IP4_ARRAY *out, DWORD *len )
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{
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char buf[FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[3])];
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DNS_ADDR_ARRAY *servers = (DNS_ADDR_ARRAY *)buf;
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DWORD ret, needed, i, num, array_len = sizeof(buf);
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struct get_serverlist_params params = { AF_INET, servers, &array_len };
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for (;;)
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{
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ret = RESOLV_CALL( get_serverlist, ¶ms );
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if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA) goto err;
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num = (array_len - FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[0])) / sizeof(DNS_ADDR);
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needed = FIELD_OFFSET(IP4_ARRAY, AddrArray[num]);
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if (!out || *len < needed)
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{
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*len = needed;
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ret = !out ? ERROR_SUCCESS : ERROR_MORE_DATA;
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goto err;
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}
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if (!ret) break;
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if ((char *)servers != buf) free( servers );
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servers = malloc( array_len );
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if (!servers)
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{
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ret = ERROR_NOT_ENOUGH_MEMORY;
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goto err;
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}
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}
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out->AddrCount = num;
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for (i = 0; i < num; i++)
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out->AddrArray[i] = ((SOCKADDR_IN *)servers->AddrArray[i].MaxSa)->sin_addr.s_addr;
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*len = needed;
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ret = ERROR_SUCCESS;
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err:
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if ((char *)servers != buf) free( servers );
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return ret;
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}
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/******************************************************************************
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* DnsQueryConfig [DNSAPI.@]
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*
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*/
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DNS_STATUS WINAPI DnsQueryConfig( DNS_CONFIG_TYPE config, DWORD flag, const WCHAR *adapter, void *reserved,
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void *buffer, DWORD *len )
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{
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DNS_STATUS ret = ERROR_INVALID_PARAMETER;
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TRACE( "(%d, %#lx, %s, %p, %p, %p)\n", config, flag, debugstr_w(adapter), reserved, buffer, len );
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if (!len) return ERROR_INVALID_PARAMETER;
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switch (config)
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{
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case DnsConfigDnsServerList:
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return get_dns_server_list( buffer, len );
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case DnsConfigHostName_A:
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case DnsConfigHostName_UTF8:
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return get_hostname_a( ComputerNameDnsHostname, buffer, len );
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case DnsConfigFullHostName_A:
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case DnsConfigFullHostName_UTF8:
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return get_hostname_a( ComputerNameDnsFullyQualified, buffer, len );
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case DnsConfigPrimaryDomainName_A:
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case DnsConfigPrimaryDomainName_UTF8:
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return get_hostname_a( ComputerNameDnsDomain, buffer, len );
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case DnsConfigHostName_W:
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return get_hostname_w( ComputerNameDnsHostname, buffer, len );
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case DnsConfigFullHostName_W:
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return get_hostname_w( ComputerNameDnsFullyQualified, buffer, len );
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case DnsConfigPrimaryDomainName_W:
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return get_hostname_w( ComputerNameDnsDomain, buffer, len );
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case DnsConfigAdapterDomainName_A:
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case DnsConfigAdapterDomainName_W:
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case DnsConfigAdapterDomainName_UTF8:
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case DnsConfigAdapterInfo:
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case DnsConfigPrimaryHostNameRegistrationEnabled:
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case DnsConfigAdapterHostNameRegistrationEnabled:
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case DnsConfigAddressRegistrationMaxCount:
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FIXME( "unimplemented config type %d\n", config );
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break;
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case DnsConfigDnsServersUnspec:
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{
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struct get_serverlist_params params = { AF_UNSPEC, buffer, len };
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return RESOLV_CALL( get_serverlist, ¶ms );
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}
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case DnsConfigDnsServersIpv4:
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{
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struct get_serverlist_params params = { AF_INET, buffer, len };
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return RESOLV_CALL( get_serverlist, ¶ms );
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}
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case DnsConfigDnsServersIpv6:
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{
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struct get_serverlist_params params = { AF_INET6, buffer, len };
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return RESOLV_CALL( get_serverlist, ¶ms );
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}
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case DnsConfigSearchList:
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{
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struct get_searchlist_params params = { buffer, len };
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return RESOLV_CALL( get_searchlist, ¶ms );
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}
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default:
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WARN( "unknown config type: %d\n", config );
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break;
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}
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return ret;
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}
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