utility.c File Reference

#include "nslookup.h"

Include dependency graph for utility.c:

Go to the source code of this file.

Functions
BOOL	SendRequest (PCHAR pInBuffer, ULONG InBufferLength, PCHAR pOutBuffer, PULONG pOutBufferLength)
void	ReverseIP (PCHAR pIP, PCHAR pReturn)
BOOL	IsValidIP (PCHAR pInput)
int	ExtractName (PCHAR pBuffer, PCHAR pOutput, USHORT Offset, UCHAR Limit)
int	ExtractIP (PCHAR pBuffer, PCHAR pOutput, USHORT Offset)
void	PrintD2 (PCHAR pBuffer, DWORD BufferLength)
void	PrintDebug (PCHAR pBuffer, DWORD BufferLength)
PCHAR	OpcodeIDtoOpcodeName (UCHAR Opcode)
PCHAR	RCodeIDtoRCodeName (UCHAR RCode)
PCHAR	TypeIDtoTypeName (USHORT TypeID)
USHORT	TypeNametoTypeID (PCHAR TypeName)
PCHAR	ClassIDtoClassName (USHORT ClassID)
USHORT	ClassNametoClassID (PCHAR ClassName)

Function Documentation

ClassIDtoClassName()

PCHAR ClassIDtoClassName

(

USHORT

ClassID

)

Definition at line 833 of file utility.c.

{
    switch( ClassID )
    {
    case CLASS_IN:
        return ClassIN;
 
    case CLASS_ANY:
        return ClassAny;
 
    default:
        return "Unknown";
    }
}

Referenced by PrintD2(), and PrintDebug().

ClassNametoClassID()

USHORT ClassNametoClassID

(

PCHAR

ClassName

)

Definition at line 848 of file utility.c.

{
    if( !strncmp( ClassName, ClassIN, strlen( ClassIN ) ) ) return CLASS_IN;
    if( !strncmp( ClassName, ClassAny, strlen( ClassAny ) ) ) return CLASS_ANY;
 
    return 0;
}

Referenced by PerformLookup().

ExtractIP()

int ExtractIP	(	PCHAR	pBuffer,
		PCHAR	pOutput,
		USHORT	Offset
	)

Definition at line 397 of file utility.c.

{
    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;
}

Referenced by PerformInternalLookup(), PerformLookup(), and PrintDebug().

ExtractName()

int ExtractName	(	PCHAR	pBuffer,
		PCHAR	pOutput,
		USHORT	Offset,
		UCHAR	Limit
	)

Definition at line 343 of file utility.c.

{
    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;
}

Referenced by PerformInternalLookup(), PerformLookup(), PrintD2(), and PrintDebug().

IsValidIP()

BOOL IsValidIP

(

PCHAR

pInput

)

Definition at line 306 of file utility.c.

{
    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;
}

Referenced by ParseCommandLine(), PerformInternalLookup(), and PerformLookup().

OpcodeIDtoOpcodeName()

PCHAR OpcodeIDtoOpcodeName

(

UCHAR

Opcode

)

Definition at line 741 of file utility.c.

{
    switch( Opcode & 0x0F )
    {
    case OPCODE_QUERY:
        return OpcodeQuery;
 
    case OPCODE_IQUERY:
        return OpcodeIQuery;
 
    case OPCODE_STATUS:
        return OpcodeStatus;
 
    default:
        return OpcodeReserved;
    }
}

Referenced by PrintD2(), and PrintDebug().

PrintD2()

void PrintD2	(	PCHAR	pBuffer,
		DWORD	BufferLength
	)

Definition at line 436 of file utility.c.

{
    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") );
}

Referenced by SendRequest().

PrintDebug()

void PrintDebug	(	PCHAR	pBuffer,
		DWORD	BufferLength
	)

Definition at line 510 of file utility.c.

{
    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") );
}

Referenced by SendRequest().

RCodeIDtoRCodeName()

PCHAR RCodeIDtoRCodeName

(

UCHAR

RCode

)

Definition at line 759 of file utility.c.

{
    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;
    }
}

Referenced by PrintD2(), and PrintDebug().

ReverseIP()

void ReverseIP	(	PCHAR	pIP,
		PCHAR	pReturn
	)

Definition at line 249 of file utility.c.

{
    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';
}

Referenced by PerformInternalLookup(), and PerformLookup().

SendRequest()

BOOL SendRequest	(	PCHAR	pInBuffer,
		ULONG	InBufferLength,
		PCHAR	pOutBuffer,
		PULONG	pOutBufferLength
	)

Definition at line 11 of file utility.c.

{
    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;
}

Referenced by AddrFileFree(), PerformInternalLookup(), and PerformLookup().

TypeIDtoTypeName()

PCHAR TypeIDtoTypeName

(

USHORT

TypeID

)

Definition at line 786 of file utility.c.

{
    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";
    }
}

Referenced by PrintD2(), and PrintDebug().

TypeNametoTypeID()

USHORT TypeNametoTypeID

(

PCHAR

TypeName

)

Definition at line 819 of file utility.c.

{
    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;
}

Referenced by PerformLookup().