TDIClnEventReceive(PVOID, CONNECTION_CONTEXT, ULONG, ULONG, ULONG, PULONG, PVOID, PIRP *);

NTSTATUS                          
TDIClnIoCompRtnRecv(PDEVICE_OBJECT, PIRP, PVOID);

NTSTATUS                                          
TDIClnIoCompRtnRecvDGram(PDEVICE_OBJECT, PIRP, PVOID);

NTSTATUS                          
TDIClnIoCompRtnAcc(PDEVICE_OBJECT, PIRP, PVOID);

NTSTATUS                     
HTTPFetch(IN pTDIClientExtension, IN pTDIClientTestStr, IN OUT PULONG);  

NTSTATUS                                       
NSLookup(IN pTDIClientExtension, IN pTDIClientTestStr, IN OUT PULONG);

NTSTATUS
GetNSInfo(pTDIClientExtension);   

#endif                                                // End #ifdef JADriverKernelMode.
  
#define FILE_DEVICE_TDIClient      0x00008A00
 
#define TDIClient_TEST  (ULONG) CTL_CODE(FILE_DEVICE_TDIClient,    \
                                         0x01,                     \
                                         METHOD_BUFFERED,          \
                                         FILE_ANY_ACCESS           \
                                        )                          
                                                                 
#define TDIClient_TEST2 (ULONG) CTL_CODE(FILE_DEVICE_TDIClient,    \
                                         0x02,                     \
                                         METHOD_BUFFERED,          \
                                         FILE_ANY_ACCESS           \
                                        )                          
                                                                 
#define TDIClient_TEST3 (ULONG) CTL_CODE(FILE_DEVICE_TDIClient,    \
                                         0x03,                     \
                                         METHOD_BUFFERED,          \
                                         FILE_ANY_ACCESS           \
                                        )                          
                                                                 
typedef enum
  {
   TDIClientUnknown,
   TDIClientClient,
   TDIClientServer,
   TDIClientURL,
   TDIClientDNS 
  }
   TDIClientOperType;

#define DNSTimeoutValue    5                          // 5 seconds.

#define charDfltRmtAddr    "192.168.1.5" 
#define charDfltServerAddr "192.168.1.2" 
#define charDfltPort       "5004" 
 
#define NSLookupQueryId    0x4a41 
 
#define GetNetwkAddr(a, b, c, d)                      /* Get address in network form; eg, GetNetwkAddr(192, 168, 1, 5) => 0x0501a8c0. */ \
          (a + (b<<8) + (c<<16) + (d<<24))
 
#define GetNetwkAddrDw(a)                             /* Get address of a doubleword (4 bytes) in network form; */ \
                                                      /* eg, GetNetwkAddrDw(-xc0a80105) => 0x0501a8c0.          */ \
          (((a&0xFF)<<24) + ((a&0xFF00)<<8) + ((a&0xFF0000)>>8) + ((a&0xFF000000)>>24))  

#define GetNetwkPort(a)                               /* Get port in network form; eg, GetNetwkPort(5004) => 0x8c13. */ \
          (((0xFF&a)<<8) + ((0xFF00&a)>>8))
 
#define TDIClientPort           5004
#define TDIClientRecvBfrLen     1024
#define TDIClnUDPBfrMaxLen       512                  /* Per RFC 1035, page 32. */
#define TDIClnLabelMaxLen         63                  /* Label is a one-byte length field followed by that number of bytes. */
                                                      /*   63 is per RFC 1035, page 8.                                      */
#define TDIClnHostAddr             1                  /* Host address. 1 (called "A") is per RFC 1035, page 12. */
#define TDIClnCanonicalName        5                  /* Canonical name for an alias.  5 (called "CNAME") is per RFC 1035, page 12. */
#define TDIClnDomainNameMaxLen   255                  /* 255 is per RFC 1035, page 8. */
#define TDIClnDNSInternetClass     1                  /* 1 (called "Internet") is per RFC 1035, page 13. */
 
typedef unsigned long ULONG;
typedef unsigned short USHORT;

typedef struct _TDIClientTestStr
  {
   ULONG             rc;                              // Return code.
   ULONG             ulBuffer;                        // Number of bytes returned in Buffer below (fields before Buffer not counted).
   ULONG             ulKernelSent;                    // Total number of bytes kernel routine sent.
   ULONG             ulKernelReceived;                // Total number of bytes kernel routine received.
   TDIClientOperType InOperType;                      // Operation.
   char              InDestAddr[256];                 // IP address or IP name, depending on operation.
   char              InDestPort[8];
   char              InDNServerIPAddr[16];
   char              InURIResource[64];
   char              Buffer[1];
  }
   TDIClientTestStr, * pTDIClientTestStr;
  
typedef struct _myDNSQuery                                                                                                            
  {                                                                                                                                   
   USHORT             QueryId;                                                                                                        
   union                                                                                                                              
     {                                                                                                                                
      USHORT          QueryFields;                                                                                                    
      struct                                                                                                                          
        {                                                                                                                             
         // Note:  These bit fields are reversed from the big-endian mapping of RFC 1035 but will yield, via the MS x86 compiler,
         //        the desired big-endian mapping.

         USHORT       RecursDesired : 1;              // 1 ==> recursion desired.
         USHORT       Truncd        : 1;              // 1 ==> message truncated.  Meaningful only in responses.
         USHORT       AuthAnsw      : 1;              // 1 ==> authoritative answer.  Meaningful only in responses.
         USHORT       OpcodeFd      : 4;              // 0 ==> standard query.
         USHORT       QryReqFd      : 1;              // 0 ==> query; 1 ==> response.
         USHORT       RespCode      : 4;              // Response code:  0 ==> success;
                                                      //                 1 ==> format error;
                                                      //                 2 ==> server error;
                                                      //                 3 ==> name error;
                                                      //                 4 ==> not implemented;
                                                      //                 5 ==> refused.
         USHORT       ZReserved     : 3;              // Reserved.
         USHORT       RecursAvail   : 1;              // 1 ==> recursion available in server.
        };
     };
   USHORT             QuestionCnt;                    // Number of entries in question section.
   USHORT             AnswerCount;                    // Number of resource records (RRs) in answer section.
   USHORT             NSRRCount;                      // Number of name-server RRs in authority-records section.
   USHORT             AddRRCount;                     // Number of RRs in addition records section.
   char               QuestionSec[1];                 // Beginning of question section.
  }
   MyDNSQuery, * pMyDNSQuery;

// Map codes in RespCode above.

#define TDIClnRespCodeOK             0
#define TDIClnRespCodeFmtErr         1 
#define TDIClnRespCodeSvrErr         2 
#define TDIClnRespCodeNameErr        3 
#define TDIClnRespCodeNotImplErr     4 
#define TDIClnRespCodeRefusedErr     5 

typedef struct _MyDNSRR                               // Map resource record (RR) AFTER name field, which may be a name
  {                                                   //   or an offset to a name.
   USHORT             RRType;                         // RR type code.
   USHORT             RRClass;                        // Class of data in RRData.
   ULONG              RRTTL;                          // Time to live, in seconds.
   USHORT             RRDataLn;                       // Size of RRData.
   char               RRData[1];                      // Response record data.  Interpretation depends on RRType and RRClass.
  }                                                                                                                                   
   MyDNSRR, * pMyDNSRR;                                                                                                               

#define TDIClnCanonRRLen (2 +                             /* Length relative pointer */    \
                          FIELD_OFFSET(MyDNSRR, RRData) + /* Length of fixed RR fields */  \
                         2)                               /* Length of relative pointer */

#define TDIClnAddrRRLen  (2 +                             /* Length relative pointer */   \
                          FIELD_OFFSET(MyDNSRR, RRData) + /* Length of fixed RR fields */ \
                         4)                               /* Length of IP address. */

//***************************************************************************//
//                                                                           //
// User-space routine prototypes.                                            //
//                                                                           //
//***************************************************************************//

void
ShowNSData(pMyDNSQuery);