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wine/dlls/dnsapi/query.c
Hans Leidekker 8981bbd464 dnsapi: Increase maximum packet size.
2013-03-11 10:41:26 +01:00

849 lines
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/*
* DNS support
*
* Copyright (C) 2006 Hans Leidekker
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include "wine/debug.h"
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
# include <arpa/nameser.h>
#endif
#ifdef HAVE_RESOLV_H
# include <resolv.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winnls.h"
#include "windns.h"
#include "nb30.h"
#include "dnsapi.h"
WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
#ifdef HAVE_RESOLV
/* call res_init() just once because of a bug in Mac OS X 10.4 */
/* call once per thread on systems that have per-thread _res */
static void initialise_resolver( void )
{
if ((_res.options & RES_INIT) == 0)
res_init();
}
static const char *dns_section_to_str( ns_sect section )
{
switch (section)
{
case ns_s_qd: return "Question";
case ns_s_an: return "Answer";
case ns_s_ns: return "Authority";
case ns_s_ar: return "Additional";
default:
{
static char tmp[5];
FIXME( "unknown section: 0x%02x\n", section );
sprintf( tmp, "0x%02x", section );
return tmp;
}
}
}
static unsigned long dns_map_options( DWORD options )
{
unsigned long ret = 0;
if (options == DNS_QUERY_STANDARD)
return RES_DEFAULT;
if (options & DNS_QUERY_ACCEPT_TRUNCATED_RESPONSE)
ret |= RES_IGNTC;
if (options & DNS_QUERY_USE_TCP_ONLY)
ret |= RES_USEVC;
if (options & DNS_QUERY_NO_RECURSION)
ret &= ~RES_RECURSE;
if (options & DNS_QUERY_NO_LOCAL_NAME)
ret &= ~RES_DNSRCH;
if (options & DNS_QUERY_NO_HOSTS_FILE)
ret |= RES_NOALIASES;
if (options & DNS_QUERY_TREAT_AS_FQDN)
ret &= ~RES_DEFNAMES;
if (options & DNS_QUERY_DONT_RESET_TTL_VALUES)
FIXME( "option DNS_QUERY_DONT_RESET_TTL_VALUES not implemented\n" );
if (options & DNS_QUERY_RESERVED)
FIXME( "option DNS_QUERY_RESERVED not implemented\n" );
if (options & DNS_QUERY_WIRE_ONLY)
FIXME( "option DNS_QUERY_WIRE_ONLY not implemented\n" );
if (options & DNS_QUERY_NO_WIRE_QUERY)
FIXME( "option DNS_QUERY_NO_WIRE_QUERY not implemented\n" );
if (options & DNS_QUERY_BYPASS_CACHE)
FIXME( "option DNS_QUERY_BYPASS_CACHE not implemented\n" );
if (options & DNS_QUERY_RETURN_MESSAGE)
FIXME( "option DNS_QUERY_RETURN_MESSAGE not implemented\n" );
if (options & DNS_QUERY_NO_NETBT)
TRACE( "netbios query disabled\n" );
return ret;
}
static DNS_STATUS dns_map_error( int error )
{
switch (error)
{
case ns_r_noerror: return ERROR_SUCCESS;
case ns_r_formerr: return DNS_ERROR_RCODE_FORMAT_ERROR;
case ns_r_servfail: return DNS_ERROR_RCODE_SERVER_FAILURE;
case ns_r_nxdomain: return DNS_ERROR_RCODE_NAME_ERROR;
case ns_r_notimpl: return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
case ns_r_refused: return DNS_ERROR_RCODE_REFUSED;
case ns_r_yxdomain: return DNS_ERROR_RCODE_YXDOMAIN;
case ns_r_yxrrset: return DNS_ERROR_RCODE_YXRRSET;
case ns_r_nxrrset: return DNS_ERROR_RCODE_NXRRSET;
case ns_r_notauth: return DNS_ERROR_RCODE_NOTAUTH;
case ns_r_notzone: return DNS_ERROR_RCODE_NOTZONE;
default:
FIXME( "unmapped error code: %d\n", error );
return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
}
}
static DNS_STATUS dns_map_h_errno( int error )
{
switch (error)
{
case NO_DATA:
case HOST_NOT_FOUND: return DNS_ERROR_RCODE_NAME_ERROR;
case TRY_AGAIN: return DNS_ERROR_RCODE_SERVER_FAILURE;
case NO_RECOVERY: return DNS_ERROR_RCODE_REFUSED;
case NETDB_INTERNAL: return DNS_ERROR_RCODE;
default:
FIXME( "unmapped error code: %d\n", error );
return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
}
}
static char *dns_dname_from_msg( ns_msg msg, const unsigned char *pos )
{
int len;
char *str, dname[NS_MAXDNAME] = ".";
/* returns *compressed* length, ignore it */
dns_ns_name_uncompress( ns_msg_base(msg), ns_msg_end(msg), pos, dname, sizeof(dname) );
len = strlen( dname );
str = heap_alloc( len + 1 );
if (str) strcpy( str, dname );
return str;
}
static char *dns_str_from_rdata( const unsigned char *rdata )
{
char *str;
unsigned int len = rdata[0];
str = heap_alloc( len + 1 );
if (str)
{
memcpy( str, ++rdata, len );
str[len] = '\0';
}
return str;
}
static unsigned int dns_get_record_size( const ns_rr *rr )
{
const unsigned char *pos = rr->rdata;
unsigned int num = 0, size = sizeof(DNS_RECORDA);
switch (rr->type)
{
case ns_t_key:
{
pos += sizeof(WORD) + sizeof(BYTE) + sizeof(BYTE);
size += rr->rdata + rr->rdlength - pos - 1;
break;
}
case ns_t_sig:
{
pos += sizeof(PCHAR) + sizeof(WORD) + 2 * sizeof(BYTE);
pos += 3 * sizeof(DWORD) + 2 * sizeof(WORD);
size += rr->rdata + rr->rdlength - pos - 1;
break;
}
case ns_t_hinfo:
case ns_t_isdn:
case ns_t_txt:
case ns_t_x25:
{
while (pos[0] && pos < rr->rdata + rr->rdlength)
{
num++;
pos += pos[0] + 1;
}
size += (num - 1) * sizeof(PCHAR);
break;
}
case ns_t_null:
{
size += rr->rdlength - 1;
break;
}
case ns_t_nxt:
case ns_t_wks:
case 0xff01: /* WINS */
{
FIXME( "unhandled type: %s\n", dns_type_to_str( rr->type ) );
break;
}
default:
break;
}
return size;
}
static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, WORD *dlen )
{
DNS_STATUS ret = ERROR_SUCCESS;
const unsigned char *pos = rr->rdata;
unsigned int i, size;
switch (rr->type)
{
case ns_t_a:
{
r->Data.A.IpAddress = *(const DWORD *)pos;
*dlen = sizeof(DNS_A_DATA);
break;
}
case ns_t_aaaa:
{
for (i = 0; i < sizeof(IP6_ADDRESS)/sizeof(DWORD); i++)
{
r->Data.AAAA.Ip6Address.IP6Dword[i] = *(const DWORD *)pos;
pos += sizeof(DWORD);
}
*dlen = sizeof(DNS_AAAA_DATA);
break;
}
case ns_t_key:
{
/* FIXME: byte order? */
r->Data.KEY.wFlags = *(const WORD *)pos; pos += sizeof(WORD);
r->Data.KEY.chProtocol = *pos++;
r->Data.KEY.chAlgorithm = *pos++;
size = rr->rdata + rr->rdlength - pos;
for (i = 0; i < size; i++)
r->Data.KEY.Key[i] = *pos++;
*dlen = sizeof(DNS_KEY_DATA) + (size - 1) * sizeof(BYTE);
break;
}
case ns_t_rp:
case ns_t_minfo:
{
r->Data.MINFO.pNameMailbox = dns_dname_from_msg( msg, pos );
if (!r->Data.MINFO.pNameMailbox) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.MINFO.pNameErrorsMailbox = dns_dname_from_msg( msg, pos );
if (!r->Data.MINFO.pNameErrorsMailbox)
{
heap_free( r->Data.MINFO.pNameMailbox );
return ERROR_NOT_ENOUGH_MEMORY;
}
*dlen = sizeof(DNS_MINFO_DATAA);
break;
}
case ns_t_afsdb:
case ns_t_rt:
case ns_t_mx:
{
r->Data.MX.wPreference = ntohs( *(const WORD *)pos );
r->Data.MX.pNameExchange = dns_dname_from_msg( msg, pos + sizeof(WORD) );
if (!r->Data.MX.pNameExchange) return ERROR_NOT_ENOUGH_MEMORY;
*dlen = sizeof(DNS_MX_DATAA);
break;
}
case ns_t_null:
{
r->Data.Null.dwByteCount = rr->rdlength;
memcpy( r->Data.Null.Data, rr->rdata, rr->rdlength );
*dlen = sizeof(DNS_NULL_DATA) + rr->rdlength - 1;
break;
}
case ns_t_cname:
case ns_t_ns:
case ns_t_mb:
case ns_t_md:
case ns_t_mf:
case ns_t_mg:
case ns_t_mr:
case ns_t_ptr:
{
r->Data.PTR.pNameHost = dns_dname_from_msg( msg, pos );
if (!r->Data.PTR.pNameHost) return ERROR_NOT_ENOUGH_MEMORY;
*dlen = sizeof(DNS_PTR_DATAA);
break;
}
case ns_t_sig:
{
r->Data.SIG.pNameSigner = dns_dname_from_msg( msg, pos );
if (!r->Data.SIG.pNameSigner) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
/* FIXME: byte order? */
r->Data.SIG.wTypeCovered = *(const WORD *)pos; pos += sizeof(WORD);
r->Data.SIG.chAlgorithm = *pos++;
r->Data.SIG.chLabelCount = *pos++;
r->Data.SIG.dwOriginalTtl = *(const DWORD *)pos; pos += sizeof(DWORD);
r->Data.SIG.dwExpiration = *(const DWORD *)pos; pos += sizeof(DWORD);
r->Data.SIG.dwTimeSigned = *(const DWORD *)pos; pos += sizeof(DWORD);
r->Data.SIG.wKeyTag = *(const WORD *)pos;
size = rr->rdata + rr->rdlength - pos;
for (i = 0; i < size; i++)
r->Data.SIG.Signature[i] = *pos++;
*dlen = sizeof(DNS_SIG_DATAA) + (size - 1) * sizeof(BYTE);
break;
}
case ns_t_soa:
{
r->Data.SOA.pNamePrimaryServer = dns_dname_from_msg( msg, pos );
if (!r->Data.SOA.pNamePrimaryServer) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.SOA.pNameAdministrator = dns_dname_from_msg( msg, pos );
if (!r->Data.SOA.pNameAdministrator)
{
heap_free( r->Data.SOA.pNamePrimaryServer );
return ERROR_NOT_ENOUGH_MEMORY;
}
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.SOA.dwSerialNo = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
r->Data.SOA.dwRefresh = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
r->Data.SOA.dwRetry = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
r->Data.SOA.dwExpire = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
r->Data.SOA.dwDefaultTtl = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
*dlen = sizeof(DNS_SOA_DATAA);
break;
}
case ns_t_srv:
{
r->Data.SRV.wPriority = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
r->Data.SRV.wWeight = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
r->Data.SRV.wPort = ntohs( *(const WORD *)pos ); pos += sizeof(WORD);
r->Data.SRV.pNameTarget = dns_dname_from_msg( msg, pos );
if (!r->Data.SRV.pNameTarget) return ERROR_NOT_ENOUGH_MEMORY;
*dlen = sizeof(DNS_SRV_DATAA);
break;
}
case ns_t_hinfo:
case ns_t_isdn:
case ns_t_x25:
case ns_t_txt:
{
i = 0;
while (pos[0] && pos < rr->rdata + rr->rdlength)
{
r->Data.TXT.pStringArray[i] = dns_str_from_rdata( pos );
if (!r->Data.TXT.pStringArray[i])
{
while (i > 0) heap_free( r->Data.TXT.pStringArray[--i] );
return ERROR_NOT_ENOUGH_MEMORY;
}
i++;
pos += pos[0] + 1;
}
r->Data.TXT.dwStringCount = i;
*dlen = sizeof(DNS_TXT_DATAA) + (i - 1) * sizeof(PCHAR);
break;
}
case ns_t_atma:
case ns_t_loc:
case ns_t_nxt:
case ns_t_tsig:
case ns_t_wks:
case 0x00f9: /* TKEY */
case 0xff01: /* WINS */
case 0xff02: /* WINSR */
default:
FIXME( "unhandled type: %s\n", dns_type_to_str( rr->type ) );
return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
}
return ret;
}
static DNS_STATUS dns_copy_record( ns_msg msg, ns_sect section,
unsigned short num, DNS_RECORDA **recp )
{
DNS_STATUS ret;
DNS_RECORDA *record;
WORD dlen;
ns_rr rr;
if (dns_ns_parserr( &msg, section, num, &rr ) < 0)
return DNS_ERROR_BAD_PACKET;
if (!(record = heap_alloc_zero( dns_get_record_size( &rr ) )))
return ERROR_NOT_ENOUGH_MEMORY;
record->pName = dns_strdup_u( rr.name );
if (!record->pName)
{
heap_free( record );
return ERROR_NOT_ENOUGH_MEMORY;
}
record->wType = rr.type;
record->Flags.S.Section = section;
record->Flags.S.CharSet = DnsCharSetUtf8;
record->dwTtl = rr.ttl;
if ((ret = dns_copy_rdata( msg, &rr, record, &dlen )))
{
heap_free( record->pName );
heap_free( record );
return ret;
}
record->wDataLength = dlen;
*recp = record;
TRACE( "found %s record in %s section\n",
dns_type_to_str( rr.type ), dns_section_to_str( section ) );
return ERROR_SUCCESS;
}
#define DEFAULT_TTL 1200
static DNS_STATUS dns_do_query_netbios( PCSTR name, DNS_RECORDA **recp )
{
NCB ncb;
UCHAR ret;
DNS_RRSET rrset;
FIND_NAME_BUFFER *buffer;
FIND_NAME_HEADER *header;
DNS_RECORDA *record = NULL;
unsigned int i, len;
DNS_STATUS status = ERROR_INVALID_NAME;
len = strlen( name );
if (len >= NCBNAMSZ) return DNS_ERROR_RCODE_NAME_ERROR;
DNS_RRSET_INIT( rrset );
memset( &ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBFINDNAME;
memset( ncb.ncb_callname, ' ', sizeof(ncb.ncb_callname) );
memcpy( ncb.ncb_callname, name, len );
ncb.ncb_callname[NCBNAMSZ - 1] = '\0';
ret = Netbios( &ncb );
if (ret != NRC_GOODRET) return ERROR_INVALID_NAME;
header = (FIND_NAME_HEADER *)ncb.ncb_buffer;
buffer = (FIND_NAME_BUFFER *)((char *)header + sizeof(FIND_NAME_HEADER));
for (i = 0; i < header->node_count; i++)
{
record = heap_alloc_zero( sizeof(DNS_RECORDA) );
if (!record)
{
status = ERROR_NOT_ENOUGH_MEMORY;
goto exit;
}
else
{
record->pName = dns_strdup_u( name );
if (!record->pName)
{
status = ERROR_NOT_ENOUGH_MEMORY;
goto exit;
}
record->wType = DNS_TYPE_A;
record->Flags.S.Section = DnsSectionAnswer;
record->Flags.S.CharSet = DnsCharSetUtf8;
record->dwTtl = DEFAULT_TTL;
/* FIXME: network byte order? */
record->Data.A.IpAddress = *(DWORD *)((char *)buffer[i].destination_addr + 2);
DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
}
}
status = ERROR_SUCCESS;
exit:
DNS_RRSET_TERMINATE( rrset );
if (status != ERROR_SUCCESS)
DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
else
*recp = (DNS_RECORDA *)rrset.pFirstRR;
return status;
}
/* res_init() must have been called before calling these three functions.
*/
static DNS_STATUS dns_set_serverlist( const IP4_ARRAY *addrs )
{
int i;
if (addrs->AddrCount > MAXNS)
{
WARN( "too many servers: %d only using the first: %d\n",
addrs->AddrCount, MAXNS );
_res.nscount = MAXNS;
}
else _res.nscount = addrs->AddrCount;
for (i = 0; i < _res.nscount; i++)
_res.nsaddr_list[i].sin_addr.s_addr = addrs->AddrArray[i];
return ERROR_SUCCESS;
}
static DNS_STATUS dns_get_serverlist( PIP4_ARRAY addrs, PDWORD len )
{
unsigned int size;
int i;
size = FIELD_OFFSET(IP4_ARRAY, AddrArray[_res.nscount]);
if (!addrs || *len < size)
{
*len = size;
return ERROR_INSUFFICIENT_BUFFER;
}
addrs->AddrCount = _res.nscount;
for (i = 0; i < _res.nscount; i++)
addrs->AddrArray[i] = _res.nsaddr_list[i].sin_addr.s_addr;
return ERROR_SUCCESS;
}
#define DNS_MAX_PACKET_SIZE 4096
static DNS_STATUS dns_do_query( PCSTR name, WORD type, DWORD options, PDNS_RECORDA *result )
{
DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
unsigned int i, num;
unsigned char answer[DNS_MAX_PACKET_SIZE];
ns_sect sections[] = { ns_s_an, ns_s_ar };
ns_msg msg;
DNS_RECORDA *record = NULL;
DNS_RRSET rrset;
int len;
DNS_RRSET_INIT( rrset );
len = res_query( name, ns_c_in, type, answer, sizeof(answer) );
if (len < 0)
{
ret = dns_map_h_errno( h_errno );
goto exit;
}
if (dns_ns_initparse( answer, len, &msg ) < 0)
{
ret = DNS_ERROR_BAD_PACKET;
goto exit;
}
#define RCODE_MASK 0x0f
if ((msg._flags & RCODE_MASK) != ns_r_noerror)
{
ret = dns_map_error( msg._flags & RCODE_MASK );
goto exit;
}
for (i = 0; i < sizeof(sections)/sizeof(sections[0]); i++)
{
for (num = 0; num < ns_msg_count( msg, sections[i] ); num++)
{
ret = dns_copy_record( msg, sections[i], num, &record );
if (ret != ERROR_SUCCESS) goto exit;
DNS_RRSET_ADD( rrset, (DNS_RECORD *)record );
}
}
exit:
DNS_RRSET_TERMINATE( rrset );
if (ret != ERROR_SUCCESS)
DnsRecordListFree( rrset.pFirstRR, DnsFreeRecordList );
else
*result = (DNS_RECORDA *)rrset.pFirstRR;
return ret;
}
#endif /* HAVE_RESOLV */
/******************************************************************************
* DnsQuery_A [DNSAPI.@]
*
*/
DNS_STATUS WINAPI DnsQuery_A( PCSTR name, WORD type, DWORD options, PVOID servers,
PDNS_RECORDA *result, PVOID *reserved )
{
WCHAR *nameW;
DNS_RECORDW *resultW;
DNS_STATUS status;
TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_a(name), dns_type_to_str( type ),
options, servers, result, reserved );
if (!name || !result)
return ERROR_INVALID_PARAMETER;
nameW = dns_strdup_aw( name );
if (!nameW) return ERROR_NOT_ENOUGH_MEMORY;
status = DnsQuery_W( nameW, type, options, servers, &resultW, reserved );
if (status == ERROR_SUCCESS)
{
*result = (DNS_RECORDA *)DnsRecordSetCopyEx(
(DNS_RECORD *)resultW, DnsCharSetUnicode, DnsCharSetAnsi );
if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
DnsRecordListFree( (DNS_RECORD *)resultW, DnsFreeRecordList );
}
heap_free( nameW );
return status;
}
/******************************************************************************
* DnsQuery_UTF8 [DNSAPI.@]
*
*/
DNS_STATUS WINAPI DnsQuery_UTF8( PCSTR name, WORD type, DWORD options, PVOID servers,
PDNS_RECORDA *result, PVOID *reserved )
{
DNS_STATUS ret = DNS_ERROR_RCODE_NOT_IMPLEMENTED;
#ifdef HAVE_RESOLV
TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_a(name), dns_type_to_str( type ),
options, servers, result, reserved );
if (!name || !result)
return ERROR_INVALID_PARAMETER;
initialise_resolver();
_res.options |= dns_map_options( options );
if (servers && (ret = dns_set_serverlist( servers )))
return ret;
ret = dns_do_query( name, type, options, result );
if (ret == DNS_ERROR_RCODE_NAME_ERROR && type == DNS_TYPE_A &&
!(options & DNS_QUERY_NO_NETBT))
{
TRACE( "dns lookup failed, trying netbios query\n" );
ret = dns_do_query_netbios( name, result );
}
#endif
return ret;
}
/******************************************************************************
* DnsQuery_W [DNSAPI.@]
*
*/
DNS_STATUS WINAPI DnsQuery_W( PCWSTR name, WORD type, DWORD options, PVOID servers,
PDNS_RECORDW *result, PVOID *reserved )
{
char *nameU;
DNS_RECORDA *resultA;
DNS_STATUS status;
TRACE( "(%s,%s,0x%08x,%p,%p,%p)\n", debugstr_w(name), dns_type_to_str( type ),
options, servers, result, reserved );
if (!name || !result)
return ERROR_INVALID_PARAMETER;
nameU = dns_strdup_wu( name );
if (!nameU) return ERROR_NOT_ENOUGH_MEMORY;
status = DnsQuery_UTF8( nameU, type, options, servers, &resultA, reserved );
if (status == ERROR_SUCCESS)
{
*result = (DNS_RECORDW *)DnsRecordSetCopyEx(
(DNS_RECORD *)resultA, DnsCharSetUtf8, DnsCharSetUnicode );
if (!*result) status = ERROR_NOT_ENOUGH_MEMORY;
DnsRecordListFree( (DNS_RECORD *)resultA, DnsFreeRecordList );
}
heap_free( nameU );
return status;
}
static DNS_STATUS dns_get_hostname_a( COMPUTER_NAME_FORMAT format,
PSTR buffer, PDWORD len )
{
char name[256];
DWORD size = sizeof(name)/sizeof(name[0]);
if (!GetComputerNameExA( format, name, &size ))
return DNS_ERROR_NAME_DOES_NOT_EXIST;
if (!buffer || (size = lstrlenA( name ) + 1) > *len)
{
*len = size;
return ERROR_INSUFFICIENT_BUFFER;
}
lstrcpyA( buffer, name );
return ERROR_SUCCESS;
}
static DNS_STATUS dns_get_hostname_w( COMPUTER_NAME_FORMAT format,
PWSTR buffer, PDWORD len )
{
WCHAR name[256];
DWORD size = sizeof(name)/sizeof(name[0]);
if (!GetComputerNameExW( format, name, &size ))
return DNS_ERROR_NAME_DOES_NOT_EXIST;
if (!buffer || (size = lstrlenW( name ) + 1) > *len)
{
*len = size;
return ERROR_INSUFFICIENT_BUFFER;
}
lstrcpyW( buffer, name );
return ERROR_SUCCESS;
}
/******************************************************************************
* DnsQueryConfig [DNSAPI.@]
*
*/
DNS_STATUS WINAPI DnsQueryConfig( DNS_CONFIG_TYPE config, DWORD flag, PCWSTR adapter,
PVOID reserved, PVOID buffer, PDWORD len )
{
DNS_STATUS ret = ERROR_INVALID_PARAMETER;
TRACE( "(%d,0x%08x,%s,%p,%p,%p)\n", config, flag, debugstr_w(adapter),
reserved, buffer, len );
if (!len) return ERROR_INVALID_PARAMETER;
switch (config)
{
case DnsConfigDnsServerList:
{
#ifdef HAVE_RESOLV
initialise_resolver();
ret = dns_get_serverlist( buffer, len );
break;
#else
WARN( "compiled without resolver support\n" );
break;
#endif
}
case DnsConfigHostName_A:
case DnsConfigHostName_UTF8:
return dns_get_hostname_a( ComputerNameDnsHostname, buffer, len );
case DnsConfigFullHostName_A:
case DnsConfigFullHostName_UTF8:
return dns_get_hostname_a( ComputerNameDnsFullyQualified, buffer, len );
case DnsConfigPrimaryDomainName_A:
case DnsConfigPrimaryDomainName_UTF8:
return dns_get_hostname_a( ComputerNameDnsDomain, buffer, len );
case DnsConfigHostName_W:
return dns_get_hostname_w( ComputerNameDnsHostname, buffer, len );
case DnsConfigFullHostName_W:
return dns_get_hostname_w( ComputerNameDnsFullyQualified, buffer, len );
case DnsConfigPrimaryDomainName_W:
return dns_get_hostname_w( ComputerNameDnsDomain, buffer, len );
case DnsConfigAdapterDomainName_A:
case DnsConfigAdapterDomainName_W:
case DnsConfigAdapterDomainName_UTF8:
case DnsConfigSearchList:
case DnsConfigAdapterInfo:
case DnsConfigPrimaryHostNameRegistrationEnabled:
case DnsConfigAdapterHostNameRegistrationEnabled:
case DnsConfigAddressRegistrationMaxCount:
FIXME( "unimplemented config type %d\n", config );
break;
default:
WARN( "unknown config type: %d\n", config );
break;
}
return ret;
}
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