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reactos/base/applications/network/nslookup/utility.c

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/*
* PROJECT: ReactOS nslookup utility
* LICENSE: GPL - See COPYING in the top level directory
* FILE: base/applications/network/nslookup/utility.c
* PURPOSE: Support functions for nslookup.c
* COPYRIGHT: Copyright 2009 Lucas Suggs <lucas.suggs@gmail.com>
*/
#include "nslookup.h"
BOOL SendRequest( PCHAR pInBuffer,
ULONG InBufferLength,
PCHAR pOutBuffer,
PULONG pOutBufferLength )
{
int j;
USHORT RequestID, ResponseID;
BOOL bWait;
SOCKET s;
SOCKADDR_IN RecAddr, RecAddr2, SendAddr;
int SendAddrLen = sizeof(SendAddr);
RtlZeroMemory( &RecAddr, sizeof(SOCKADDR_IN) );
RtlZeroMemory( &RecAddr2, sizeof(SOCKADDR_IN) );
RtlZeroMemory( &SendAddr, sizeof(SOCKADDR_IN) );
/* Pull the request ID from the buffer. */
RequestID = ntohs( ((PSHORT)&pInBuffer[0])[0] );
/* If D2 flags is enabled, then display D2 information. */
if( State.d2 ) PrintD2( pInBuffer, InBufferLength );
/* Create the sockets for both send and receive. */
s = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
if (s == INVALID_SOCKET)
return FALSE;
/* Set up the structure to tell it where we are going. */
RecAddr.sin_family = AF_INET;
RecAddr.sin_port = htons( State.port );
RecAddr.sin_addr.s_addr = inet_addr( State.DefaultServerAddress );
/* Set up the structure to tell it what port to listen on. */
RecAddr2.sin_family = AF_INET;
RecAddr2.sin_port = htons( State.port );
RecAddr2.sin_addr.s_addr = htonl( INADDR_ANY );
/* Bind the receive socket. */
bind( s, (SOCKADDR*)&RecAddr2, sizeof(RecAddr2) );
/* Send the datagram to the DNS server. */
j = sendto( s,
pInBuffer,
InBufferLength,
0,
(SOCKADDR*)&RecAddr,
sizeof(RecAddr) );
if( j == SOCKET_ERROR )
{
switch( WSAGetLastError() )
{
case WSANOTINITIALISED:
_tprintf( _T("sendto() failed with WSANOTINITIALIZED\n") );
break;
case WSAENETDOWN:
_tprintf( _T("sendto() failed with WSAENETDOWN\n") );
break;
case WSAEACCES:
_tprintf( _T("sendto() failed with WSAEACCES\n") );
break;
case WSAEINVAL:
_tprintf( _T("sendto() failed with WSAEINVAL\n") );
break;
case WSAEINTR:
_tprintf( _T("sendto() failed with WSAEINTR\n") );
break;
case WSAEINPROGRESS:
_tprintf( _T("sendto() failed with WSAEINPROGRESS\n") );
break;
case WSAEFAULT:
_tprintf( _T("sendto() failed with WSAEFAULT\n") );
break;
case WSAENETRESET:
_tprintf( _T("sendto() failed with WSAENETRESET\n") );
break;
case WSAENOBUFS:
_tprintf( _T("sendto() failed with WSAENOBUFS\n") );
break;
case WSAENOTCONN:
_tprintf( _T("sendto() failed with WSAENOTCONN\n") );
break;
case WSAENOTSOCK:
_tprintf( _T("sendto() failed with WSAENOTSOCK\n") );
break;
case WSAEOPNOTSUPP:
_tprintf( _T("sendto() failed with WSAEOPNOTSUPP\n") );
break;
case WSAESHUTDOWN:
_tprintf( _T("sendto() failed with WSAESHUTDOWN\n") );
break;
case WSAEWOULDBLOCK:
_tprintf( _T("sendto() failed with WSAEWOULDBLOCK\n") );
break;
case WSAEMSGSIZE:
_tprintf( _T("sendto() failed with WSAEMSGSIZE\n") );
break;
case WSAEHOSTUNREACH:
_tprintf( _T("sendto() failed with WSAEHOSTUNREACH\n") );
break;
case WSAECONNABORTED:
_tprintf( _T("sendto() failed with WSAECONNABORTED\n") );
break;
case WSAECONNRESET:
_tprintf( _T("sendto() failed with WSAECONNRESET\n") );
break;
case WSAEADDRNOTAVAIL:
_tprintf( _T("sendto() failed with WSAEADDRNOTAVAIL\n") );
break;
case WSAEAFNOSUPPORT:
_tprintf( _T("sendto() failed with WSAEAFNOSUPPORT\n") );
break;
case WSAEDESTADDRREQ:
_tprintf( _T("sendto() failed with WSAEDESTADDRREQ\n") );
break;
case WSAENETUNREACH:
_tprintf( _T("sendto() failed with WSAENETUNREACH\n") );
break;
case WSAETIMEDOUT:
_tprintf( _T("sendto() failed with WSAETIMEDOUT\n") );
break;
default:
_tprintf( _T("sendto() failed with unknown error\n") );
}
closesocket( s );
return FALSE;
}
bWait = TRUE;
while( bWait )
{
/* Wait for the DNS reply. */
j = recvfrom( s,
pOutBuffer,
*pOutBufferLength,
0,
(SOCKADDR*)&SendAddr,
&SendAddrLen );
if( j == SOCKET_ERROR )
{
switch( WSAGetLastError() )
{
case WSANOTINITIALISED:
_tprintf( _T("recvfrom() failed with WSANOTINITIALIZED\n") );
break;
case WSAENETDOWN:
_tprintf( _T("recvfrom() failed with WSAENETDOWN\n") );
break;
case WSAEACCES:
_tprintf( _T("recvfrom() failed with WSAEACCES\n") );
break;
case WSAEINVAL:
_tprintf( _T("recvfrom() failed with WSAEINVAL\n") );
break;
case WSAEINTR:
_tprintf( _T("recvfrom() failed with WSAEINTR\n") );
break;
case WSAEINPROGRESS:
_tprintf( _T("recvfrom() failed with WSAEINPROGRESS\n") );
break;
case WSAEFAULT:
_tprintf( _T("recvfrom() failed with WSAEFAULT\n") );
break;
case WSAENETRESET:
_tprintf( _T("recvfrom() failed with WSAENETRESET\n") );
break;
case WSAENOBUFS:
_tprintf( _T("recvfrom() failed with WSAENOBUFS\n") );
break;
case WSAENOTCONN:
_tprintf( _T("recvfrom() failed with WSAENOTCONN\n") );
break;
case WSAENOTSOCK:
_tprintf( _T("recvfrom() failed with WSAENOTSOCK\n") );
break;
case WSAEOPNOTSUPP:
_tprintf( _T("recvfrom() failed with WSAEOPNOTSUPP\n") );
break;
case WSAESHUTDOWN:
_tprintf( _T("recvfrom() failed with WSAESHUTDOWN\n") );
break;
case WSAEWOULDBLOCK:
_tprintf( _T("recvfrom() failed with WSAEWOULDBLOCK\n") );
break;
case WSAEMSGSIZE:
_tprintf( _T("recvfrom() failed with WSAEMSGSIZE\n") );
break;
case WSAEHOSTUNREACH:
_tprintf( _T("recvfrom() failed with WSAEHOSTUNREACH\n") );
break;
case WSAECONNABORTED:
_tprintf( _T("recvfrom() failed with WSAECONNABORTED\n") );
break;
case WSAECONNRESET:
_tprintf( _T("recvfrom() failed with WSAECONNRESET\n") );
break;
case WSAEADDRNOTAVAIL:
_tprintf( _T("recvfrom() failed with WSAEADDRNOTAVAIL\n") );
break;
case WSAEAFNOSUPPORT:
_tprintf( _T("recvfrom() failed with WSAEAFNOSUPPORT\n") );
break;
case WSAEDESTADDRREQ:
_tprintf( _T("recvfrom() failed with WSAEDESTADDRREQ\n") );
break;
case WSAENETUNREACH:
_tprintf( _T("recvfrom() failed with WSAENETUNREACH\n") );
break;
case WSAETIMEDOUT:
_tprintf( _T("recvfrom() failed with WSAETIMEDOUT\n") );
break;
default:
_tprintf( _T("recvfrom() failed with unknown error\n") );
}
closesocket( s );
return FALSE;
}
ResponseID = ntohs( ((PSHORT)&pOutBuffer[0])[0] );
if( ResponseID == RequestID ) bWait = FALSE;
}
/* We don't need the sockets anymore. */
closesocket( s );
/* If debug information then display debug information. */
if( State.debug ) PrintDebug( pOutBuffer, j );
/* Return the real output buffer length. */
*pOutBufferLength = j;
return TRUE;
}
void ReverseIP( PCHAR pIP, PCHAR pReturn )
{
int i;
int j;
int k = 0;
j = strlen( pIP ) - 1;
i = j;
/* We have A.B.C.D
We will turn this into D.C.B.A and stick it in pReturn */
/* A */
for( ; i > 0; i -= 1 ) if( '.' == pIP[i] ) break;
strncpy( &pReturn[k], &pIP[i + 1], (j - i) );
k += (j - i);
pReturn[k] = '.';
k += 1;
i -= 1;
j = i;
/* B */
for( ; i > 0; i -= 1 ) if( '.' == pIP[i] ) break;
strncpy( &pReturn[k], &pIP[i + 1], (j - i) );
k += (j - i);
pReturn[k] = '.';
k += 1;
i -= 1;
j = i;
/* C */
for( ; i > 0; i -= 1 ) if( '.' == pIP[i] ) break;
strncpy( &pReturn[k], &pIP[i + 1], (j - i) );
k += (j - i);
pReturn[k] = '.';
k += 1;
i -= 1;
j = i;
/* D */
for( ; i > 0; i -= 1 );
strncpy( &pReturn[k], &pIP[i], (j - i) + 1 );
k += (j - i) + 1;
pReturn[k] = '\0';
}
BOOL IsValidIP( PCHAR pInput )
{
int i = 0, l = 0, b = 0, c = 1;
/* Max length of an IP, e.g. 255.255.255.255, is 15 characters. */
l = strlen( pInput );
if( l > 15 ) return FALSE;
/* 'b' is the count of the current segment. It gets reset after seeing a
'.'. */
for( ; i < l; i += 1 )
{
if( '.' == pInput[i] )
{
if( !b ) return FALSE;
if( b > 3 ) return FALSE;
b = 0;
c += 1;
}
else
{
b += 1;
if( (pInput[i] < '0') || (pInput[i] > '9') ) return FALSE;
}
}
if( b > 3 ) return FALSE;
/* 'c' is the number of segments seen. If it's less than 4, then it's not
a valid IP. */
if( c < 4 ) return FALSE;
return TRUE;
}
int ExtractName( PCHAR pBuffer, PCHAR pOutput, USHORT Offset, UCHAR Limit )
{
int c = 0, d = 0, i = 0, j = 0, k = 0, l = 0, m = 0;
i = Offset;
/* If Limit == 0, then we assume "no" limit. */
d = Limit;
if( 0 == Limit ) d = 255;
while( d > 0 )
{
l = pBuffer[i] & 0xFF;
i += 1;
if( !m ) c += 1;
if( 0xC0 == l )
{
if( !m ) c += 1;
m = 1;
d += (255 - Limit);
i = pBuffer[i];
}
else
{
for( j = 0; j < l; j += 1 )
{
pOutput[k] = pBuffer[i];
i += 1;
if( !m ) c += 1;
k += 1;
d -= 1;
}
d -= 1;
if( !pBuffer[i] || (d < 1) ) break;
pOutput[k] = '.';
k += 1;
}
};
if( !m )
{
if( !Limit ) c += 1;
}
pOutput[k] = '\0';
return c;
}
int ExtractIP( PCHAR pBuffer, PCHAR pOutput, USHORT Offset )
{
int c = 0, l = 0, i = 0, v = 0;
i = Offset;
v = (UCHAR)pBuffer[i];
l += 1;
i += 1;
sprintf( &pOutput[c], "%d.", v );
c += strlen( &pOutput[c] );
v = (UCHAR)pBuffer[i];
l += 1;
i += 1;
sprintf( &pOutput[c], "%d.", v );
c += strlen( &pOutput[c] );
v = (UCHAR)pBuffer[i];
l += 1;
i += 1;
sprintf( &pOutput[c], "%d.", v );
c += strlen( &pOutput[c] );
v = (UCHAR)pBuffer[i];
l += 1;
i += 1;
sprintf( &pOutput[c], "%d", v );
c += strlen( &pOutput[c] );
pOutput[c] = '\0';
return l;
}
void PrintD2( PCHAR pBuffer, DWORD BufferLength )
{
USHORT RequestID;
UCHAR Header1, Header2;
USHORT NumQuestions, NumAnswers, NumAuthority, NumAdditional;
USHORT Type, Class;
CHAR pName[255];
int i = 0, k = 0;
RequestID = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Header1 = pBuffer[i];
i += 1;
Header2 = pBuffer[i];
i += 1;
NumQuestions = ntohs( ((PSHORT)&pBuffer[i])[0] );
i += 2;
NumAnswers = ntohs( ((PSHORT)&pBuffer[i])[0] );
i += 2;
NumAuthority = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
NumAdditional = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T("------------\n") );
_tprintf( _T("SendRequest(), len %d\n"), (int)BufferLength );
_tprintf( _T(" HEADER:\n") );
_tprintf( _T(" opcode = %s, id = %d, rcode = %s\n"),
OpcodeIDtoOpcodeName( (Header1 & 0x78) >> 3 ),
(int)RequestID,
RCodeIDtoRCodeName( Header2 & 0x0F ) );
_tprintf( _T(" header flags: query") );
if( Header1 & 0x01 ) _tprintf( _T(", want recursion") );
_tprintf( _T("\n") );
_tprintf( _T(" questions = %d, answers = %d,"
" authority records = %d, additional = %d\n\n"),
(int)NumQuestions,
(int)NumAnswers,
(int)NumAuthority,
(int)NumAdditional );
if( NumQuestions )
{
_tprintf( _T(" QUESTIONS:\n") );
for( k = 0; k < NumQuestions; k += 1 )
{
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" %s"), pName );
Type = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Class = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T(", type = %s, class = %s\n"),
TypeIDtoTypeName( Type ),
ClassIDtoClassName( Class ) );
}
}
_tprintf( _T("\n------------\n") );
}
void PrintDebug( PCHAR pBuffer, DWORD BufferLength )
{
USHORT ResponseID;
UCHAR Header1, Header2;
USHORT NumQuestions, NumAnswers, NumAuthority, NumAdditional;
USHORT Type, Class;
ULONG TTL;
CHAR pName[255];
int d = 0, i = 0, k = 0;
ResponseID = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Header1 = pBuffer[i];
i += 1;
Header2 = pBuffer[i];
i += 1;
NumQuestions = ntohs( ((PSHORT)&pBuffer[i])[0] );
i += 2;
NumAnswers = ntohs( ((PSHORT)&pBuffer[i])[0] );
i += 2;
NumAuthority = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
NumAdditional = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T("------------\n") );
_tprintf( _T("Got answer (%d bytes):\n"), (int)BufferLength );
_tprintf( _T(" HEADER:\n") );
_tprintf( _T(" opcode = %s, id = %d, rcode = %s\n"),
OpcodeIDtoOpcodeName( (Header1 & 0x78) >> 3 ),
(int)ResponseID,
RCodeIDtoRCodeName( Header2 & 0x0F ) );
_tprintf( _T(" header flags: response") );
if( Header1 & 0x01 ) _tprintf( _T(", want recursion") );
if( Header2 & 0x80 ) _tprintf( _T(", recursion avail.") );
_tprintf( _T("\n") );
_tprintf( _T(" questions = %d, answers = %d, "
"authority records = %d, additional = %d\n\n"),
(int)NumQuestions,
(int)NumAnswers,
(int)NumAuthority,
(int)NumAdditional );
if( NumQuestions )
{
_tprintf( _T(" QUESTIONS:\n") );
for( k = 0; k < NumQuestions; k += 1 )
{
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" %s"), pName );
Type = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Class = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T(", type = %s, class = %s\n"),
TypeIDtoTypeName( Type ),
ClassIDtoClassName( Class ) );
}
}
if( NumAnswers )
{
_tprintf( _T(" ANSWERS:\n") );
for( k = 0; k < NumAnswers; k += 1 )
{
_tprintf( _T(" -> ") );
/* Print out the name. */
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T("%s\n"), pName );
/* Print out the type, class and data length. */
Type = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Class = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
TTL = ntohl( ((PULONG)&pBuffer[i])[0] );
i += 4;
d = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T(" type = %s, class = %s, dlen = %d\n"),
TypeIDtoTypeName( Type ),
ClassIDtoClassName( Class ),
d );
/* Print out the answer. */
if( TYPE_A == Type )
{
i += ExtractIP( pBuffer, pName, i );
_tprintf( _T(" internet address = %s\n"), pName );
}
else
{
i += ExtractName( pBuffer, pName, i, d );
_tprintf( _T(" name = %s\n"), pName );
}
_tprintf( _T(" ttl = %d ()\n"), (int)TTL );
}
}
if( NumAuthority )
{
_tprintf( _T(" AUTHORITY RECORDS:\n") );
for( k = 0; k < NumAuthority; k += 1 )
{
/* Print out the zone name. */
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" -> %s\n"), pName );
/* Print out the type, class, data length and TTL. */
Type = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Class = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
TTL = ntohl( ((PULONG)&pBuffer[i])[0] );
i += 4;
d = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T(" type = %s, class = %s, dlen = %d\n"),
TypeIDtoTypeName( Type ),
ClassIDtoClassName( Class ),
d );
/* TODO: There might be more types? */
if( TYPE_NS == Type )
{
/* Print out the NS. */
i += ExtractName( pBuffer, pName, i, d );
_tprintf( _T(" nameserver = %s\n"), pName );
_tprintf( _T(" ttl = %d ()\n"), (int)TTL );
}
else if( TYPE_SOA == Type )
{
_tprintf( _T(" ttl = %d ()\n"), (int)TTL );
/* Print out the primary NS. */
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" primary name server = %s\n"), pName );
/* Print out the responsible mailbox. */
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" responsible mail addr = %s\n"), pName );
/* Print out the serial, refresh, retry, expire and default TTL. */
_tprintf( _T(" serial = ()\n") );
_tprintf( _T(" refresh = ()\n") );
_tprintf( _T(" retry = ()\n") );
_tprintf( _T(" expire = ()\n") );
_tprintf( _T(" default TTL = ()\n") );
i += 20;
}
}
}
if( NumAdditional )
{
_tprintf( _T(" ADDITIONAL:\n") );
for( k = 0; k < NumAdditional; k += 1 )
{
/* Print the name. */
i += ExtractName( pBuffer, pName, i, 0 );
_tprintf( _T(" -> %s\n"), pName );
/* Print out the type, class, data length and TTL. */
Type = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
Class = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
TTL = ntohl( ((PULONG)&pBuffer[i])[0] );
i += 4;
d = ntohs( ((PUSHORT)&pBuffer[i])[0] );
i += 2;
_tprintf( _T(" type = %s, class = %s, dlen = %d\n"),
TypeIDtoTypeName( Type ),
ClassIDtoClassName( Class ),
d );
/* TODO: There might be more types? */
if( TYPE_A == Type )
{
/* Print out the NS. */
i += ExtractIP( pBuffer, pName, i );
_tprintf( _T(" internet address = %s\n"), pName );
_tprintf( _T(" ttl = %d ()\n"), (int)TTL );
}
}
}
_tprintf( _T("\n------------\n") );
}
PCHAR OpcodeIDtoOpcodeName( UCHAR Opcode )
{
switch( Opcode & 0x0F )
{
case OPCODE_QUERY:
return OpcodeQuery;
case OPCODE_IQUERY:
return OpcodeIQuery;
case OPCODE_STATUS:
return OpcodeStatus;
default:
return OpcodeReserved;
}
}
PCHAR RCodeIDtoRCodeName( UCHAR RCode )
{
switch( RCode & 0x0F )
{
case RCODE_NOERROR:
return RCodeNOERROR;
case RCODE_FORMERR:
return RCodeFORMERR;
case RCODE_FAILURE:
return RCodeFAILURE;
case RCODE_NXDOMAIN:
return RCodeNXDOMAIN;
case RCODE_NOTIMP:
return RCodeNOTIMP;
case RCODE_REFUSED:
return RCodeREFUSED;
default:
return RCodeReserved;
}
}
PCHAR TypeIDtoTypeName( USHORT TypeID )
{
switch( TypeID )
{
case TYPE_A:
return TypeA;
case TYPE_NS:
return TypeNS;
case TYPE_CNAME:
return TypeCNAME;
case TYPE_SOA:
return TypeSOA;
case TYPE_WKS:
return TypeSRV;
case TYPE_PTR:
return TypePTR;
case TYPE_MX:
return TypeMX;
case TYPE_ANY:
return TypeAny;
default:
return "Unknown";
}
}
USHORT TypeNametoTypeID( PCHAR TypeName )
{
if( !strncmp( TypeName, TypeA, strlen( TypeA ) ) ) return TYPE_A;
if( !strncmp( TypeName, TypeNS, strlen( TypeNS ) ) ) return TYPE_NS;
if( !strncmp( TypeName, TypeCNAME, strlen( TypeCNAME ) ) ) return TYPE_CNAME;
if( !strncmp( TypeName, TypeSOA, strlen( TypeSOA ) ) ) return TYPE_SOA;
if( !strncmp( TypeName, TypeSRV, strlen( TypeSRV ) ) ) return TYPE_WKS;
if( !strncmp( TypeName, TypePTR, strlen( TypePTR ) ) ) return TYPE_PTR;
if( !strncmp( TypeName, TypeMX, strlen( TypeMX ) ) ) return TYPE_MX;
if( !strncmp( TypeName, TypeAny, strlen( TypeAny ) ) ) return TYPE_ANY;
return 0;
}
PCHAR ClassIDtoClassName( USHORT ClassID )
{
switch( ClassID )
{
case CLASS_IN:
return ClassIN;
case CLASS_ANY:
return ClassAny;
default:
return "Unknown";
}
}
USHORT ClassNametoClassID( PCHAR ClassName )
{
if( !strncmp( ClassName, ClassIN, strlen( ClassIN ) ) ) return CLASS_IN;
if( !strncmp( ClassName, ClassAny, strlen( ClassAny ) ) ) return CLASS_ANY;
return 0;
}
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