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#include "brian.h"
typedef struct _ASYNC_READ {
USHORT FileIndex; BOOLEAN UseEvent; PIO_APC_ROUTINE ApcRoutine; PVOID ApcContext; PUSHORT BufferIndexPtr; USHORT BufferIndex; ULONG Length; PLARGE_INTEGER ByteOffsetPtr; LARGE_INTEGER ByteOffset; PULONG KeyPtr; ULONG Key; BOOLEAN DisplayParms; BOOLEAN VerboseResults; USHORT AsyncIndex;
} ASYNC_READ, *PASYNC_READ;
#define USE_EVENT_DEFAULT TRUE
#define APC_ROUTINE_DEFAULT NULL
#define APC_CONTEXT_DEFAULT NULL
#define READ_LENGTH_DEFAULT 100L
#define DISPLAY_PARMS_DEFAULT FALSE
#define VERBOSE_RESULTS_DEFAULT FALSE
VOIDFullRead( IN OUT PASYNC_READ AsyncRead );
VOIDInputRead( IN PCHAR ParamBuffer ){ ULONG FileIndex; BOOLEAN UseEvent; PIO_APC_ROUTINE ApcRoutine; PVOID ApcContext; PUSHORT BufferIndexPtr; USHORT BufferIndex; ULONG Length; PLARGE_INTEGER ByteOffsetPtr; LARGE_INTEGER ByteOffset; PULONG KeyPtr; ULONG Key; BOOLEAN DisplayParms; BOOLEAN VerboseResults; USHORT AsyncIndex;
BOOLEAN ParamReceived; BOOLEAN LastInput;
//
// Set the defaults.
//
UseEvent = USE_EVENT_DEFAULT; ApcRoutine = APC_ROUTINE_DEFAULT; ApcContext = APC_CONTEXT_DEFAULT; BufferIndexPtr = NULL; BufferIndex = 0; Length = READ_LENGTH_DEFAULT; ByteOffsetPtr = NULL; ByteOffset = RtlConvertUlongToLargeInteger( 0L ); KeyPtr = NULL; Key = 0; DisplayParms = DISPLAY_PARMS_DEFAULT; VerboseResults = VERBOSE_RESULTS_DEFAULT; AsyncIndex = 0;
ParamReceived = FALSE; LastInput = TRUE;
//
// While there is more input, analyze the parameter and update the
// query flags.
//
while (TRUE) {
ULONG DummyCount; ULONG TempIndex;
//
// Swallow leading white spaces.
//
ParamBuffer = SwallowWhite( ParamBuffer, &DummyCount );
if (*ParamBuffer) {
//
// If the next parameter is legal then check the paramter value.
// Update the parameter value.
//
if ((*ParamBuffer == '-' || *ParamBuffer == '/') && (ParamBuffer++, *ParamBuffer != '\0')) {
//
// Switch on the next character.
//
switch (*ParamBuffer) {
//
// Update the buffer index.
//
case 'b' : case 'B' :
//
// Move to the next character, as long as there
// are no white spaces continue analyzing letters.
// On the first bad letter, skip to the next
// parameter.
//
ParamBuffer++;
TempIndex = AsciiToInteger( ParamBuffer ); BufferIndex = (USHORT) TempIndex; BufferIndexPtr = &BufferIndex;
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
//
// Update the byte count.
//
case 'l' : case 'L' :
//
// Move to the next character, as long as there
// are no white spaces continue analyzing letters.
// On the first bad letter, skip to the next
// parameter.
//
ParamBuffer++;
Length = AsciiToInteger( ParamBuffer );
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
//
// Update the file handle index.
//
case 'i' : case 'I' :
//
// Move to the next character, as long as there
// are no white spaces continue analyzing letters.
// On the first bad letter, skip to the next
// parameter.
//
ParamBuffer++;
FileIndex = AsciiToInteger( ParamBuffer );
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
ParamReceived = TRUE;
break;
//
// Update the key value.
//
case 'k' : case 'K' :
//
// Move to the next character, as long as there
// are no white spaces continue analyzing letters.
// On the first bad letter, skip to the next
// parameter.
//
ParamBuffer++;
Key = AsciiToInteger( ParamBuffer ); KeyPtr = &Key;
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
//
// Update the offset of the read.
//
case 'o' : case 'O' :
//
// Move to the next character, as long as there
// are no white spaces continue analyzing letters.
// On the first bad letter, skip to the next
// parameter.
//
ParamBuffer++;
ByteOffset.QuadPart = AsciiToLargeInteger( ParamBuffer ); ByteOffsetPtr = &ByteOffset;
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
//
// Check whether we should use an event to signal
// completion.
//
case 'e' : case 'E' :
//
// Legal values for use event are T/t or F/f.
//
ParamBuffer++;
if (*ParamBuffer == 'T' || *ParamBuffer == 't') {
UseEvent = TRUE; ParamBuffer++;
} else if (*ParamBuffer == 'F' || *ParamBuffer == 'f') {
UseEvent = FALSE; ParamBuffer++; }
break;
case 'v' : case 'V' :
//
// Legal values for params are T/t or F/f.
//
ParamBuffer++;
if( *ParamBuffer == 'T' || *ParamBuffer == 't' ) {
VerboseResults = TRUE; ParamBuffer++;
} else if( *ParamBuffer == 'F' || *ParamBuffer == 'f' ) {
VerboseResults = FALSE; ParamBuffer++;
}
break;
case 'y' : case 'Y' :
//
// Set the display parms flag and jump over this
// character.
//
DisplayParms = TRUE; ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
case 'z' : case 'Z' :
//
// Set flag for more input and jump over this char.
//
LastInput = FALSE; ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
break;
default :
//
// Swallow to the next white space and continue the
// loop.
//
ParamBuffer = SwallowNonWhite( ParamBuffer, &DummyCount );
}
}
//
// Else the text is invalid, skip the entire block.
//
//
//
// Else if there is no input then exit.
//
} else if( LastInput ) {
break;
//
// Else try to read another line for open parameters.
//
} else {
}
}
//
// If no parameters were received then display the syntax message.
//
if (!ParamReceived) {
printf( "\n Usage: rd [options]* -i<index> [options]*\n" ); printf( "\n Options:" ); printf( "\n -i<digits> File index" ); printf( "\n -l<digits> Read length" ); printf( "\n -b<digits> Buffer index" ); printf( "\n -k<digits> Locked bytes key value" ); printf( "\n -o<digits> Read offset" ); printf( "\n -e[t|f] Use event on completion" ); printf( "\n -v[t|f] Verbose results" ); printf( "\n -y Display parameters to query" ); printf( "\n -z Additional input line" ); printf( "\n\n" );
//
// Else call our read routine.
//
} else {
NTSTATUS Status; SIZE_T RegionSize; ULONG TempIndex;
PASYNC_READ AsyncRead;
HANDLE ThreadHandle; ULONG ThreadId;
RegionSize = sizeof( ASYNC_READ );
Status = AllocateBuffer( 0, &RegionSize, &TempIndex ); AsyncIndex = (USHORT) TempIndex;
if (!NT_SUCCESS( Status )) {
printf("\n\tInputRead: Unable to allocate async structure" );
} else {
AsyncRead = (PASYNC_READ) Buffers[AsyncIndex].Buffer;
AsyncRead->FileIndex = (USHORT) FileIndex; AsyncRead->UseEvent = UseEvent; AsyncRead->ApcRoutine = ApcRoutine; AsyncRead->ApcContext = ApcContext;
AsyncRead->BufferIndex = BufferIndex; AsyncRead->BufferIndexPtr = BufferIndexPtr ? &AsyncRead->BufferIndex : BufferIndexPtr; AsyncRead->Length = Length; AsyncRead->ByteOffset = ByteOffset; AsyncRead->ByteOffsetPtr = ByteOffsetPtr ? &AsyncRead->ByteOffset : ByteOffsetPtr; AsyncRead->Key = Key; AsyncRead->KeyPtr = KeyPtr ? &AsyncRead->Key : KeyPtr;
AsyncRead->DisplayParms = DisplayParms; AsyncRead->VerboseResults = VerboseResults; AsyncRead->AsyncIndex = AsyncIndex;
if (!SynchronousCmds) {
ThreadHandle = CreateThread( NULL, 0, FullRead, AsyncRead, 0, &ThreadId );
if (ThreadHandle == 0) {
printf( "\nInputRead: Spawning thread fails -> %d\n", GetLastError() ); return; }
} else {
FullRead( AsyncRead ); } } } return;}
VOIDFullRead( IN OUT PASYNC_READ AsyncRead ){ NTSTATUS Status; IO_STATUS_BLOCK Iosb;
HANDLE ThisEvent; USHORT ThisEventIndex; USHORT ThisBufferIndex;
BOOLEAN UnwindReadBuffer = FALSE; BOOLEAN UnwindEvent = FALSE;
Status = STATUS_SUCCESS;
if (AsyncRead->DisplayParms) {
bprint "\nRead Parameters" ); bprint "\n File Handle Index -> %d", AsyncRead->FileIndex ); bprint "\n UseEvent -> %d", AsyncRead->UseEvent ); bprint "\n ApcRoutine -> %08lx", AsyncRead->ApcRoutine ); bprint "\n ApcContext -> %08lx", AsyncRead->ApcContext ); bprint "\n Buffer Index Ptr -> %08lx", AsyncRead->BufferIndexPtr ); if (AsyncRead->BufferIndexPtr) {
bprint "\n BufferIndex value -> %04x", AsyncRead->BufferIndex ); }
bprint "\n Length -> %08lx", AsyncRead->Length );
bprint "\n Byte Offset Ptr -> %08lx", AsyncRead->ByteOffsetPtr ); if (AsyncRead->ByteOffsetPtr) {
bprint "\n Byte Offset High -> %08lx", AsyncRead->ByteOffset.HighPart ); bprint "\n Byte Offset Low -> %08lx", AsyncRead->ByteOffset.LowPart ); }
bprint "\n Key Ptr -> %08lx", AsyncRead->KeyPtr );
if (AsyncRead->KeyPtr) {
bprint "\n Key -> %ul", AsyncRead->Key ); }
bprint "\n\n" ); }
try {
SIZE_T ThisLength;
//
// If we need a buffer, allocate it now.
//
if (AsyncRead->BufferIndexPtr == NULL) {
ULONG TempIndex;
ThisLength = AsyncRead->Length;
Status = AllocateBuffer( 0L, &ThisLength, &TempIndex );
ThisBufferIndex = (USHORT) TempIndex;
if (!NT_SUCCESS( Status )) {
bprint "\n\tFullRead: Unable to allocate a read buffer" ); try_return( Status ); }
bprint "\n\tFullRead: Reading into buffer -> %04x", ThisBufferIndex ); bprint "\n" );
UnwindReadBuffer = TRUE;
} else {
ThisBufferIndex = AsyncRead->BufferIndex; }
//
// Check that the buffer index is valid.
//
if (ThisBufferIndex >= MAX_BUFFERS) {
bprint "\n\tFullRead: The read buffer index is invalid" ); try_return( Status = STATUS_INVALID_HANDLE ); }
//
// Check that the file index is valid.
//
if (AsyncRead->FileIndex >= MAX_HANDLES) {
bprint "\n\tFullRead: The file index is invalid" ); try_return( Status = STATUS_INVALID_HANDLE ); }
//
// If we need an event, allocate and set it now.
//
if (AsyncRead->UseEvent == TRUE) {
Status = ObtainEvent( &ThisEventIndex );
if (!NT_SUCCESS( Status )) {
bprint "\n\tFullRead: Unable to allocate an event" ); try_return( Status ); }
UnwindEvent = TRUE; ThisEvent = Events[ThisEventIndex].Handle;
} else {
ThisEvent = 0; }
//
// Call the read routine.
//
Status = NtReadFile( Handles[AsyncRead->FileIndex].Handle, ThisEvent, AsyncRead->ApcRoutine, AsyncRead->ApcContext, &Iosb, Buffers[ThisBufferIndex].Buffer, AsyncRead->Length, AsyncRead->ByteOffsetPtr, AsyncRead->KeyPtr );
UnwindReadBuffer = FALSE;
if (AsyncRead->VerboseResults) {
bprint "\nReadFile: Status -> %08lx", Status );
if (AsyncRead->UseEvent && NT_SUCCESS( Status )) {
if ((Status = NtWaitForSingleObject( ThisEvent, FALSE, NULL )) != STATUS_SUCCESS) {
bprint "\n\tReadFile: Wait for event failed -> %08lx", Status ); bprint "\n" ); try_return( Status ); } }
if (NT_SUCCESS( Status )) {
bprint "\n Iosb.Information -> %08lx", Iosb.Information ); bprint "\n Iosb.Status -> %08lx", Iosb.Status ); } bprint "\n" ); }
try_return( Status );
try_exit: NOTHING; } finally {
if (UnwindReadBuffer) {
DeallocateBuffer( ThisBufferIndex ); }
if (UnwindEvent) {
FreeEvent( ThisEventIndex ); }
DeallocateBuffer( AsyncRead->AsyncIndex ); }
if (!SynchronousCmds) {
NtTerminateThread( 0, STATUS_SUCCESS ); }}
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