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