/*++ Copyright (c) 1991 Microsoft Corporation Module Name: llclib.c Abstract: This module includes some general purpose library routines Contents: SwapMemCpy RemoveFromLinkList LlcSleep LlcInitUnicodeString LlcFreeUnicodeString Author: Antti Saarenheimo (o-anttis) 20-MAY-1991 Revision History: --*/ #include #include // // This table is used to swap the bits within each byte. // The bits are in a reverse order in the token-ring frame header. // We must swap the bits in a ethernet frame header, when the header // is copied to a user buffer. // UCHAR Swap[256] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff }; VOID SwapMemCpy( IN BOOLEAN boolSwapBytes, IN PUCHAR pDest, IN PUCHAR pSrc, IN UINT Len ) /*++ Routine Description: conditionally swaps the bits within the copied bytes. Arguments: boolSwapBytes - TRUE if bytes are to be bit-swapped pDest - where to copy to pSrc - where to copy from Len - number of bytes to copy Return Value: None. --*/ { if (boolSwapBytes) { SwappingMemCpy(pDest, pSrc, Len); } else { LlcMemCpy(pDest, pSrc, Len); } } VOID RemoveFromLinkList( IN OUT PVOID* ppBase, IN PVOID pElement ) /*++ Routine Description: Searches and removes the given element from a single-entry link list. ASSUMES: the link points to the link field in the next object Arguments: ppBase - pointer to pointer to queue pElement - pointer to element to remove from queue Return Value: None. --*/ { for (; (PQUEUE_PACKET)*ppBase; ppBase = (PVOID*)&(((PQUEUE_PACKET)*ppBase)->pNext)) { if (*ppBase == pElement) { *ppBase = ((PQUEUE_PACKET)pElement)->pNext; #if LLC_DBG ((PQUEUE_PACKET)pElement)->pNext = NULL; #endif break; } } } VOID LlcSleep( IN LONG lMicroSeconds ) /*++ Routine Description: Suspends thread execution for a short time Arguments: lMicroSeconds - number of microseconds to wait Return Value: None. --*/ { TIME t; t.LowTime = -(lMicroSeconds * 10); t.HighTime = -1; KeDelayExecutionThread(UserMode, FALSE, &t); } DLC_STATUS LlcInitUnicodeString( OUT PUNICODE_STRING pStringDest, IN PUNICODE_STRING pStringSrc ) /*++ Routine Description: initialize a UNICODE_STRING Arguments: pStringDest - pointer to UNICODE_STRING structure to initialize pStringSrc - pointer to UNICODE_STRING structure containing valid string Return Value: DLC_STATUS Success - STATUS_SUCCESS Failure - DLC_STATUS_NO_MEMORY Couldn't allocate memory from non-paged pool --*/ { pStringDest->MaximumLength = (USHORT)(pStringSrc->Length + sizeof(WCHAR)); pStringDest->Buffer = ALLOCATE_STRING_DRIVER(pStringDest->MaximumLength); if (pStringDest->Buffer == NULL) { return DLC_STATUS_NO_MEMORY; } else { RtlCopyUnicodeString(pStringDest, pStringSrc); return STATUS_SUCCESS; } } VOID LlcFreeUnicodeString( IN PUNICODE_STRING UnicodeString ) /*++ Routine Description: Companion routine to LlcInitUnicodeString - frees memory allocated from non-paged pool for a UNICODE string Arguments: UnicodeString - pointer to UNICODE_STRING structure, the buffer for which was allocated in LlcInitUnicodeString Return Value: None. --*/ { FREE_STRING_DRIVER(UnicodeString->Buffer); } //#if LLC_DBG // //VOID //LlcInvalidObjectType( VOID ) //{ // DbgPrint( "DLC: Invalid object type!\n"); // DbgBreakPoint(); //} // // //VOID LlcBreakListCorrupt( VOID ) //{ // DbgPrint( "Link list is corrupt! "); // DbgBreakPoint(); //} // //static PUCHAR aLanLlcInputStrings[] = { // "DISC0", // "DISC1", // "DM0", // "DM1", // "FRMR0", // "FRMR1", // "SABME0", // "SABME1", // "UA0", // "UA1", // "IS_I_r0", // "IS_I_r1", // "IS_I_c0", // "IS_I_c1", // "OS_I_r0", // "OS_I_r1", // "OS_I_c0", // "OS_I_c1", // "REJ_r0", // "REJ_r1", // "REJ_c0", // "REJ_c1", // "RNR_r0", // "RNR_r1", // "RNR_c0", // "RNR_c1", // "RR_r0", // "RR_r1", // "RR_c0", // "RR_c1", // "LPDU_INVALID_r0", // "LPDU_INVALID_r1", // "LPDU_INVALID_c0", // "LPDU_INVALID_c1", // "ACTIVATE_LS", // "DEACTIVATE_LS", // "ENTER_LCL_Busy", // "EXIT_LCL_Busy", // "SEND_I_POLL", // "SET_ABME", // "SET_ADM", // "Ti_Expired", // "T1_Expired", // "T2_Expired" //}; // //// //// Procedure prints the last global inputs and time stamps. This //// does not print the stamps of a specific link station!!! //// //VOID //PrintLastInputs( // IN PUCHAR pszMessage, // IN PDATA_LINK pLink // ) //{ // UINT i; // UINT j = 0; // // DbgPrint( pszMessage ); // // // // // Print 20 last time stamps and state inputs of the given // // link station. // // // for (i = InputIndex - 1; i > InputIndex - LLC_INPUT_TABLE_SIZE; i--) // { // if (aLast[ i % LLC_INPUT_TABLE_SIZE ].pLink == pLink) // { // DbgPrint( // "%4x:%10s, ", // aLast[i % LLC_INPUT_TABLE_SIZE].Time, // aLanLlcInputStrings[ aLast[i % LLC_INPUT_TABLE_SIZE].Input] // ); // j++; // if ((j % 4) == 0) // { // DbgPrint( "\n" ); // } // if (j == 20) // { // break; // } // } // } //} //#endif