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windows-nt/Source/XPSP1/NT/ds/dns/server/wmi/source/dconvert.c

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/*++
Copyright (c) 1998 Microsoft Corporation
Module Name:
dconvert.c
Abstract:
Domain Name System (DNS) Server -- Admin Client Library
RPC record conversion routines.
Convert DNS_RECORD records into RPC buffer.
Author:
Jing Chen (t-jingc) June, 1998
reverse functions of rconvert.c
Revision History:
--*/
#include "dnsclip.h"
//
// size of string in RPC format
//
// JBUGBUG: may have to do (-1) for terminating NULL
//
#define STRING_UTF8_BUF_SIZE( string, fUnicode ) \
Dns_GetBufferLengthForStringCopy( \
(string), \
0, \
((fUnicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \
DnsCharSetUtf8 )
#if 0
// with comments
Dns_GetBufferLengthForStringCopy( \
(string), \ // string
0, \ // unknown length
((fUnicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \ // in string
DnsCharSetUtf8 ) // RPC string always UTF8
#endif
//
// Writing strings to RPC buffer format
//
#define WRITE_STRING_TO_RPC_BUF(buf, psz, len, funicode) \
Dns_StringCopy( \
(buf), \
NULL, \
(psz), \
(len), \
((funicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \
DnsCharSetUtf8 )
#if 0
// with commments
Dns_StringCopy( \
(buf), \ // buffer
NULL, \ // adequate buffer length
(psz), \ // string
(len), \ // string length (if known)
((funicode) ? DnsCharSetUnicode : DnsCharSet), \ // input format
DnsCharSetUtf8 ) // RPC buffer always in UTF8
#endif
//
// size of name in RPC format
//
// JBUGBUG: may have to do (-1) for terminating NULL
//
#define NAME_UTF8_BUF_SIZE( string, fUnicode ) \
Dns_GetBufferLengthForStringCopy( \
(string), \
0, \
((fUnicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \
DnsCharSetUtf8 )
#if 0
// with comments
Dns_GetBufferLengthForStringCopy( \
(string), \ // string
0, \ // unknown length
((fUnicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \ // in string
DnsCharSetUtf8 ) // RPC string always UTF8
#endif
//
// Writing names to RPC buffer format
//
#define WRITE_NAME_TO_RPC_BUF(buf, psz, len, funicode) \
Dns_StringCopy( \
(buf), \
NULL, \
(psz), \
(len), \
((funicode) ? DnsCharSetUnicode : DnsCharSetUtf8), \
DnsCharSetUtf8 )
#if 0
// with commments
Dns_StringCopy( \
(buf), \ // buffer
NULL, \ // adequate buffer length
(psz), \ // string
(len), \ // string length (if known)
((funicode) ? DnsCharSetUnicode : DnsCharSet), \ // input format
DnsCharSetUtf8 ) // RPC buffer always in UTF8
#endif
//
// Private protos
//
PDNS_RPC_RECORD
Rpc_AllocateRecord(
IN DWORD BufferLength
);
//
// RPC buffer conversion functions
//
PDNS_RPC_RECORD
ADnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Convert A record from DNS Record to RPC buffer.
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DNS_ASSERT( pRR->wDataLength == sizeof(IP_ADDRESS) );
prpcRR = Rpc_AllocateRecord( sizeof(IP_ADDRESS) );
if ( !prpcRR )
{
return( NULL );
}
prpcRR->Data.A.ipAddress = pRR->Data.A.IpAddress;
return( prpcRR);
}
PDNS_RPC_RECORD
PtrDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Process PTR compatible record from wire.
Includes: NS, PTR, CNAME, MB, MR, MG, MD, MF
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DWORD length;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// PTR data is another domain name
//
// determine required buffer length and allocate
//
length = NAME_UTF8_BUF_SIZE(pRR->Data.PTR.pNameHost, funicode);
prpcRR = Rpc_AllocateRecord( sizeof(DNS_RPC_NAME) + length );
if ( !prpcRR )
{
return( NULL );
}
//
// write hostname into buffer, immediately following PTR data struct
//
prpcRR->Data.PTR.nameNode.cchNameLength = (UCHAR)length;
WRITE_NAME_TO_RPC_BUF(
prpcRR->Data.PTR.nameNode.achName, // buffer
pRR->Data.PTR.pNameHost,
0,
funicode );
return( prpcRR );
}
PDNS_RPC_RECORD
SoaDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Convert SOA record from DNS Record to RPC buffer.
Arguments:
pRR - ptr to record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DWORD length1;
DWORD length2;
PDNS_RPC_NAME pnamePrimary;
PDNS_RPC_NAME pnameAdmin;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
//
length1 = NAME_UTF8_BUF_SIZE( pRR->Data.SOA.pNamePrimaryServer, funicode );
length2 = NAME_UTF8_BUF_SIZE( pRR->Data.SOA.pNameAdministrator, funicode );
prpcRR = Rpc_AllocateRecord(
SIZEOF_SOA_FIXED_DATA + sizeof(DNS_RPC_NAME) * 2 +
length1 + length2 );
if ( !prpcRR )
{
return( NULL );
}
//
// copy fixed fields
//
RtlCopyMemory(
(PCHAR) & prpcRR->Data.SOA.dwSerialNo,
(PCHAR) & pRR->Data.SOA.dwSerialNo,
SIZEOF_SOA_FIXED_DATA );
//
// copy names into RR buffer
// - primary server immediately follows SOA data struct
// - responsible party follows primary server
//
pnamePrimary = &prpcRR->Data.SOA.namePrimaryServer;
pnamePrimary->cchNameLength = (UCHAR) length1;
pnameAdmin = DNS_GET_NEXT_NAME( pnamePrimary );
pnameAdmin->cchNameLength = (UCHAR) length2;
WRITE_NAME_TO_RPC_BUF(
pnamePrimary->achName,
pRR->Data.Soa.pNamePrimaryServer,
0,
funicode );
WRITE_NAME_TO_RPC_BUF(
pnameAdmin->achName,
pRR->Data.Soa.pNameAdministrator,
0,
funicode );
return( prpcRR );
}
PDNS_RPC_RECORD
TxtDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Read TXT compatible record from wire.
Includes: TXT, X25, HINFO, ISDN
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DWORD bufLength;
DWORD length;
INT count;
PCHAR pch;
PCHAR * ppstring;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
// - allocate space for each string
// - and ptr for each string
//
bufLength = 0;
count = pRR->Data.TXT.dwStringCount;
ppstring = pRR->Data.TXT.pStringArray;
while ( count-- )
{
length = STRING_UTF8_BUF_SIZE( *ppstring++, funicode );
bufLength += sizeof(DNS_RPC_NAME) + length;
}
// allocate
prpcRR = Rpc_AllocateRecord( bufLength );
if ( !prpcRR )
{
return( NULL );
}
//
// go back through list copying strings to buffer
// - ptrs to strings are saved to argv like data section
// ppstring walks through this section
// - first string written immediately following data section
// - each subsequent string immediately follows predecessor
// pchbuffer keeps ptr to position to write strings
//
// JBUGBUG: a mess
//
pch = (PCHAR) &prpcRR->Data.TXT;
ppstring = pRR->Data.TXT.pStringArray;
count = pRR->Data.TXT.dwStringCount;
while ( count-- )
{
length = STRING_UTF8_BUF_SIZE( *ppstring, funicode );
(UCHAR) *pch++ += (UCHAR) length; //+1 for TXT type only
length = WRITE_STRING_TO_RPC_BUF(
pch,
*ppstring++,
0,
funicode
);
pch += length;
#if DBG
DNS_PRINT((
"Read text string %s\n",
* (ppstring - 1)
));
#endif
}
return( prpcRR );
}
PDNS_RPC_RECORD
MinfoDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Read MINFO record from wire.
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DWORD length1;
DWORD length2;
PDNS_RPC_NAME prpcName1;
PDNS_RPC_NAME prpcName2;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
//
length1 = NAME_UTF8_BUF_SIZE( pRR->Data.MINFO.pNameMailbox, funicode );
length2 = NAME_UTF8_BUF_SIZE( pRR->Data.MINFO.pNameErrorsMailbox, funicode );
prpcRR = Rpc_AllocateRecord( sizeof(DNS_RPC_NAME) * 2 + length1 + length2 );
if ( !prpcRR )
{
return( NULL );
}
//
// copy names into RR buffer
// - mailbox immediately follows MINFO data struct
// - errors mailbox immediately follows primary server
//
prpcName1 = &prpcRR->Data.MINFO.nameMailBox;
prpcName1->cchNameLength = (UCHAR) length1;
prpcName2 = DNS_GET_NEXT_NAME( prpcName1);
prpcName2->cchNameLength = (UCHAR) length2;
WRITE_NAME_TO_RPC_BUF(
prpcName1->achName,
pRR->Data.MINFO.pNameMailbox,
0,
funicode );
WRITE_NAME_TO_RPC_BUF(
prpcName2->achName,
pRR->Data.MINFO.pNameErrorsMailbox,
0,
funicode );
return( prpcRR );
}
PDNS_RPC_RECORD
MxDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
convert MX compatible record.
Includes: MX, RT, AFSDB
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
PDNS_RPC_NAME prpcName;
DWORD length;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
//
length = NAME_UTF8_BUF_SIZE( pRR->Data.MX.pNameExchange, funicode );
prpcRR = Rpc_AllocateRecord(
SIZEOF_MX_FIXED_DATA + sizeof(DNS_RPC_NAME) + length );
if ( !prpcRR )
{
return( NULL );
}
//
// copy preference
//
prpcRR->Data.MX.wPreference = pRR->Data.MX.wPreference;
//
// write hostname into buffer, immediately following MX struct
//
prpcName = &prpcRR->Data.MX.nameExchange;
prpcName->cchNameLength = (UCHAR) length;
WRITE_NAME_TO_RPC_BUF(
prpcName->achName,
pRR->Data.MX.pNameExchange,
0,
funicode );
return( prpcRR );
}
PDNS_RPC_RECORD
FlatDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Convert memory copy compatible record.
Includes AAAA and WINS types.
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
DWORD bufLength;
//
// determine required buffer length and allocate
//
bufLength = pRR->wDataLength;
prpcRR = Rpc_AllocateRecord( bufLength );
if ( !prpcRR )
{
return( NULL );
}
//
// copy packet data to record
//
RtlCopyMemory(
& prpcRR->Data,
& pRR->Data,
bufLength );
return( prpcRR );
}
PDNS_RPC_RECORD
SrvDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
convert SRV record.
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
PDNS_RPC_NAME prpcName;
DWORD length;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
//
length = NAME_UTF8_BUF_SIZE( pRR->Data.SRV.pNameTarget, funicode );
prpcRR = Rpc_AllocateRecord(
SIZEOF_SRV_FIXED_DATA + sizeof(DNS_RPC_NAME) + length );
if ( !prpcRR )
{
return( NULL );
}
//
// copy SRV fixed fields
//
prpcRR->Data.SRV.wPriority = pRR->Data.SRV.wPriority;
prpcRR->Data.SRV.wWeight = pRR->Data.SRV.wWeight;
prpcRR->Data.SRV.wPort = pRR->Data.SRV.wPort;
//
// write hostname into buffer, immediately following SRV struct
//
prpcName = &prpcRR->Data.SRV.nameTarget;
prpcName->cchNameLength = (UCHAR) length;
WRITE_NAME_TO_RPC_BUF(
prpcName->achName,
pRR->Data.SRV.pNameTarget,
0,
funicode );
return( prpcRR );
}
PDNS_RPC_RECORD
NbstatDnsRecordConvert(
IN PDNS_RECORD pRR
)
/*++
Routine Description:
Read WINSR record from wire.
Arguments:
pRR - record being read
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRR;
PDNS_RPC_NAME prpcName;
DWORD length;
BOOL funicode = IS_UNICODE_RECORD( pRR );
//
// determine required buffer length and allocate
//
length = NAME_UTF8_BUF_SIZE( pRR->Data.WINSR.pNameResultDomain, funicode );
prpcRR = Rpc_AllocateRecord(
SIZEOF_NBSTAT_FIXED_DATA + sizeof(DNS_RPC_NAME) + length );
if ( !prpcRR )
{
return( NULL );
}
//
// copy WINSR fixed fields
//
prpcRR->Data.WINSR.dwMappingFlag = pRR->Data.WINSR.dwMappingFlag;
prpcRR->Data.WINSR.dwLookupTimeout = pRR->Data.WINSR.dwLookupTimeout;
prpcRR->Data.WINSR.dwCacheTimeout = pRR->Data.WINSR.dwCacheTimeout;
//
// write hostname into buffer, immediately following WINSR struct
//
prpcName = &prpcRR->Data.WINSR.nameResultDomain;
prpcName->cchNameLength = (UCHAR) length;
WRITE_NAME_TO_RPC_BUF(
prpcName->achName,
pRR->Data.WINSR.pNameResultDomain,
0,
funicode );
return( prpcRR );
}
//
// Jump table for DNS_RECORD => RPC buffer conversion.
//
typedef PDNS_RPC_RECORD (* RECORD_TO_RPC_CONVERT_FUNCTION)( PDNS_RECORD );
RECORD_TO_RPC_CONVERT_FUNCTION RecordToRpcConvertTable[] =
{
NULL, // ZERO
ADnsRecordConvert, // A
PtrDnsRecordConvert, // NS
PtrDnsRecordConvert, // MD
PtrDnsRecordConvert, // MF
PtrDnsRecordConvert, // CNAME
SoaDnsRecordConvert, // SOA
PtrDnsRecordConvert, // MB
PtrDnsRecordConvert, // MG
PtrDnsRecordConvert, // MR
NULL, // NULL
FlatDnsRecordConvert, // WKS
PtrDnsRecordConvert, // PTR
TxtDnsRecordConvert, // HINFO
MinfoDnsRecordConvert, // MINFO
MxDnsRecordConvert, // MX
TxtDnsRecordConvert, // TXT
MinfoDnsRecordConvert, // RP
MxDnsRecordConvert, // AFSDB
TxtDnsRecordConvert, // X25
TxtDnsRecordConvert, // ISDN
MxDnsRecordConvert, // RT
NULL, // NSAP
NULL, // NSAPPTR
NULL, // SIG
NULL, // KEY
NULL, // PX
NULL, // GPOS
FlatDnsRecordConvert, // AAAA
NULL, // 29
NULL, // 30
NULL, // 31
NULL, // 32
SrvDnsRecordConvert, // SRV
//
// NOTE: last type indexed by type ID MUST be set
// as MAX_SELF_INDEXED_TYPE #define in record.h
// (see note above in record info table)
// note these follow, but require OFFSET_TO_WINS_RR subtraction
// from actual type value
NULL, // DNS_TYPE_ATMA
NULL, // 0x0023
NULL, // 0x0024
NULL, // 0x0025
NULL, // 0x0026
NULL, // 0x0027
NULL, // 0x0028
NULL, // DNS_TYPE_TKEY
NULL, // DNS_TYPE_TSIG
FlatDnsRecordConvert, // WINS
NbstatDnsRecordConvert // WINS-R
};
PDNS_RPC_RECORD
Rpc_AllocateRecord(
IN DWORD BufferLength
)
/*++
Routine Description:
Allocate RPC record structure.
Arguments:
wBufferLength - desired buffer length (beyond structure header)
Return Value:
Ptr to buffer.
NULL on error.
--*/
{
PDNS_RPC_RECORD prr;
if ( BufferLength > MAXWORD )
{
return( NULL );
}
prr = ALLOCATE_HEAP( SIZEOF_DNS_RPC_RECORD_HEADER + BufferLength );
if ( !prr )
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return( NULL );
}
// set datalength to buffer length
prr->wDataLength = (WORD) BufferLength;
return( prr );
}
PDNS_RPC_RECORD
DnsConvertRecordToRpcBuffer(
IN PDNS_RECORD pRecord
)
/*++
Routine Description:
Convert standard DNS record to RPC buffer.
Arguments:
pRecord -- DNS Record to be converted.
//fUnicode -- flag, write records into unicode
Return Value:
Ptr to new RPC buffer if successful.
NULL on failure.
--*/
{
PDNS_RPC_RECORD prpcRecord;
WORD index;
WORD type;
RECORD_TO_RPC_CONVERT_FUNCTION pFunc;
DNS_ASSERT( DNS_IS_DWORD_ALIGNED(pRecord) );
IF_DNSDBG( RPC2 )
{
DNS_PRINT((
"Enter DnsConvertRecordToRpcBuffer()\n"
"\tpRecord = %p\n",
pRecord ));
}
//DNS_RRSET_INIT( rrset );
//
// convert record
// set unicode flag if converting
//
//if ( fUnicode )
//{
//SET_RPC_UNICODE( pRecord );
//}
type = pRecord->wType;
index = INDEX_FOR_TYPE( type );
DNS_ASSERT( index <= MAX_RECORD_TYPE_INDEX );
if ( !index || !(pFunc = RecordToRpcConvertTable[ index ]) )
{
// if unknown type try flat record copy -- best we can
// do to protect if server added new types since admin built
DNS_PRINT((
"ERROR: no DNS_RECORD to RPC conversion routine for type %d.\n"
"\tusing flat conversion routine.\n",
type ));
pFunc = FlatDnsRecordConvert;
}
prpcRecord = (*pFunc)( pRecord );
if ( ! prpcRecord )
{
DNS_PRINT((
"ERROR: Record build routine failure for record type %d.\n"
"\tstatus = %p\n\n",
type,
GetLastError() ));
return(NULL);
}
//
// fill out record structure
//
prpcRecord->wType = type;
prpcRecord->dwTtlSeconds = pRecord->dwTtl;
//
// JBUGBUG: data types (root hint, glue set)
// - need way to default that works for NT4
//
/*
if ( prpcRecord->dwFlags & DNS_RPC_RECORD_FLAG_CACHE_DATA )
{
precord->Flags.S.Section = DNSREC_CACHE_DATA;
}
else
{
precord->Flags.S.Section = DNSREC_ZONE_DATA;
}
*/
IF_DNSDBG( INIT )
{
DNS_PRINT((
"New RPC buffer built\n"
));
}
IF_DNSDBG( RPC2 )
{
/*
DnsDbg_RecordSet(
"Finished DnsConvertRpcBufferToRecords() ",
rrset.pFirstRR );
*/
DNS_PRINT((
"Finished DnsConvertRpcBufferToRecords() "
));
}
return(prpcRecord);
}
//
// End dconvert.c
//
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