475 lines
14 KiB
C
475 lines
14 KiB
C
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/*
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* Copyright (c) 2001 - 2005 NetGroup, Politecnico di Torino (Italy)
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* Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Politecnico di Torino, CACE Technologies
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* nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _time_calls
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#define _time_calls
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#ifdef WIN_NT_DRIVER
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#include "debug.h"
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#include "ndis.h"
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#define DEFAULT_TIMESTAMPMODE 0
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#define TIMESTAMPMODE_SINGLE_SYNCHRONIZATION 0
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#define TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_WITH_FIXUP 1
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#define TIMESTAMPMODE_QUERYSYSTEMTIME 2
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#define TIMESTAMPMODE_RDTSC 3
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#define TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_NO_FIXUP 99
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#define TIMESTAMPMODE_REGKEY L"TimestampMode"
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extern ULONG TimestampMode;
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/*!
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\brief A microsecond precise timestamp.
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included in the sf_pkthdr or the bpf_hdr that NPF associates with every packet.
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*/
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struct timeval {
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long tv_sec; ///< seconds
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long tv_usec; ///< microseconds
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};
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#endif /*WIN_NT_DRIVER*/
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struct time_conv
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{
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ULONGLONG reference;
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struct timeval start[32];
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};
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#ifdef WIN_NT_DRIVER
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__inline void TIME_DESYNCHRONIZE( struct time_conv * data )
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{
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data->reference = 0;
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// data->start.tv_sec = 0;
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// data->start.tv_usec = 0;
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}
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__inline void ReadTimeStampModeFromRegistry( PUNICODE_STRING RegistryPath )
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{
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ULONG NewLength;
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PWSTR NullTerminatedString;
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RTL_QUERY_REGISTRY_TABLE Queries[2];
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ULONG DefaultTimestampMode = DEFAULT_TIMESTAMPMODE;
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NewLength = RegistryPath->Length / 2;
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NullTerminatedString = ExAllocatePoolWithTag( PagedPool, ( NewLength + 1 ) * sizeof( WCHAR ), '2TWA' );
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if ( NullTerminatedString != NULL )
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{
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RtlCopyMemory( NullTerminatedString, RegistryPath->Buffer, RegistryPath->Length );
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NullTerminatedString[NewLength] = 0;
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RtlZeroMemory( Queries, sizeof( Queries ));
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Queries[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
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Queries[0].Name = TIMESTAMPMODE_REGKEY;
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Queries[0].EntryContext = & TimestampMode;
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Queries[0].DefaultType = REG_DWORD;
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Queries[0].DefaultData = & DefaultTimestampMode;
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Queries[0].DefaultLength = sizeof( ULONG );
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if( RtlQueryRegistryValues( RTL_REGISTRY_ABSOLUTE, NullTerminatedString, Queries, NULL, NULL ) != STATUS_SUCCESS )
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{
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TimestampMode = DEFAULT_TIMESTAMPMODE;
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}
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RtlWriteRegistryValue( RTL_REGISTRY_ABSOLUTE, NullTerminatedString, TIMESTAMPMODE_REGKEY, REG_DWORD, & TimestampMode, sizeof( ULONG ));
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ExFreePool( NullTerminatedString );
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}
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else
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TimestampMode = DEFAULT_TIMESTAMPMODE;
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}
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#pragma optimize ("g",off) //Due to some weird behaviour of the optimizer of DDK build 2600
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/* KeQueryPerformanceCounter TimeStamps */
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__inline void SynchronizeOnCpu( struct timeval * start )
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{
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// struct timeval *start = (struct timeval*)Data;
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struct timeval tmp;
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LARGE_INTEGER SystemTime;
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LARGE_INTEGER i;
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ULONG tmp2;
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LARGE_INTEGER TimeFreq, PTime;
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// get the absolute value of the system boot time.
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PTime = KeQueryPerformanceCounter(& TimeFreq );
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KeQuerySystemTime(& SystemTime );
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start->tv_sec = ( LONG )( SystemTime.QuadPart / 10000000 - 11644473600 );
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start->tv_usec = ( LONG )(( SystemTime.QuadPart % 10000000 )/ 10 );
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start->tv_sec -= ( ULONG )( PTime.QuadPart / TimeFreq.QuadPart );
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start->tv_usec -= ( LONG )(( PTime.QuadPart % TimeFreq.QuadPart )* 1000000 / TimeFreq.QuadPart );
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if ( start->tv_usec < 0 )
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{
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start->tv_sec --;
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start->tv_usec += 1000000;
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}
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}
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//
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// inline assembler is not supported with the current AMD64 compilers
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// At the moment we simply disable this timestamping mode on AMD64.
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// A solution would be to allocate a small memory from the non-paged
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// pool, dump the instructions on that buffer, and then execute them.
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// The non paged pool is needed since it's the only area of kernel
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// data memory that is not subject to the NX protection.
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// Or use some lower level trick, like using an assembler to assemble
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// a small function for this.
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//
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#ifdef _X86_
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/*RDTSC timestamps */
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/* callers must be at IRQL=PASSIVE_LEVEL*/
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__inline VOID TimeSynchronizeRDTSC( struct time_conv * data )
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{
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struct timeval tmp;
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LARGE_INTEGER system_time;
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ULONGLONG curr_ticks;
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KIRQL old;
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LARGE_INTEGER start_kqpc, stop_kqpc, start_freq, stop_freq;
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ULONGLONG start_ticks, stop_ticks;
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ULONGLONG delta, delta2;
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KEVENT event;
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LARGE_INTEGER i;
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ULONGLONG reference;
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if ( data->reference != 0 )
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return;
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KeInitializeEvent(& event, NotificationEvent, FALSE );
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i.QuadPart = - 3500000;
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KeRaiseIrql( HIGH_LEVEL,& old );
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start_kqpc = KeQueryPerformanceCounter(& start_freq );
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__asm
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{
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push eax
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push edx
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push ecx
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rdtsc
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lea ecx, start_ticks
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mov [ecx + 4], edx
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mov [ecx], eax
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pop ecx
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pop edx
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pop eax
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}
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KeLowerIrql( old );
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KeWaitForSingleObject(& event, UserRequest, KernelMode, TRUE ,& i );
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KeRaiseIrql( HIGH_LEVEL,& old );
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stop_kqpc = KeQueryPerformanceCounter(& stop_freq );
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__asm
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{
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push eax
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push edx
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push ecx
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rdtsc
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lea ecx, stop_ticks
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mov [ecx + 4], edx
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mov [ecx], eax
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pop ecx
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pop edx
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pop eax
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}
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KeLowerIrql( old );
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delta = stop_ticks - start_ticks;
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delta2 = stop_kqpc.QuadPart - start_kqpc.QuadPart;
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if ( delta > 10000000000 )
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{
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delta /= 16;
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delta2 /= 16;
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}
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reference = delta *( start_freq.QuadPart )/ delta2;
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data->reference = reference / 1000;
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if ( reference % 1000 > 500 )
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data->reference ++;
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data->reference *= 1000;
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reference = data->reference;
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KeQuerySystemTime(& system_time );
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__asm
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{
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push eax
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push edx
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push ecx
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rdtsc
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lea ecx, curr_ticks
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mov [ecx + 4], edx
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mov [ecx], eax
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pop ecx
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pop edx
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pop eax
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}
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tmp.tv_sec = -( LONG )( curr_ticks / reference );
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tmp.tv_usec = -( LONG )(( curr_ticks % reference )* 1000000 / reference );
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system_time.QuadPart -= 116444736000000000;
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tmp.tv_sec += ( LONG )( system_time.QuadPart / 10000000 );
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tmp.tv_usec += ( LONG )(( system_time.QuadPart % 10000000 )/ 10 );
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if ( tmp.tv_usec < 0 )
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{
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tmp.tv_sec --;
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tmp.tv_usec += 1000000;
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}
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data->start[0] = tmp;
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IF_LOUD( DbgPrint( "Frequency %I64u MHz\n", data->reference );)
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}
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#endif //_X86_
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#pragma optimize ("g",on) //Due to some weird behaviour of the optimizer of DDK build 2600
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__inline VOID TIME_SYNCHRONIZE( struct time_conv * data )
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{
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ULONG NumberOfCpus, i;
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KAFFINITY AffinityMask;
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if ( data->reference != 0 )
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return;
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NumberOfCpus = NdisSystemProcessorCount();
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if ( TimestampMode == TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_WITH_FIXUP || TimestampMode == TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_NO_FIXUP )
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{
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for ( i = 0 ; i < NumberOfCpus ; i ++ )
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{
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AffinityMask = ( 1 << i );
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ZwSetInformationThread( NtCurrentThread(), ThreadAffinityMask, & AffinityMask, sizeof( KAFFINITY ));
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SynchronizeOnCpu(&( data->start[i] ));
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}
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AffinityMask = 0xFFFFFFFF;
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ZwSetInformationThread( NtCurrentThread(), ThreadAffinityMask, & AffinityMask, sizeof( KAFFINITY ));
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data->reference = 1;
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}
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else
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if ( TimestampMode == TIMESTAMPMODE_QUERYSYSTEMTIME )
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{
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//do nothing
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data->reference = 1;
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}
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else
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//
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// This timestamp mode is supported on x86 (32 bit) only
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//
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#ifdef _X86_
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if ( TimestampMode == TIMESTAMPMODE_RDTSC )
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{
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TimeSynchronizeRDTSC( data );
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}
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else
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#endif // _X86_
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{ //it should be only the normal case i.e. TIMESTAMPMODE_SINGLESYNCHRONIZATION
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SynchronizeOnCpu( data->start );
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data->reference = 1;
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}
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return;
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}
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#pragma optimize ("g",off) //Due to some weird behaviour of the optimizer of DDK build 2600
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__inline void GetTimeKQPC( struct timeval * dst, struct time_conv * data )
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{
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LARGE_INTEGER PTime, TimeFreq;
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LONG tmp;
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ULONG CurrentCpu;
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static struct timeval old_ts = {0, 0};
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PTime = KeQueryPerformanceCounter(& TimeFreq );
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tmp = ( LONG )( PTime.QuadPart / TimeFreq.QuadPart );
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if ( TimestampMode == TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_WITH_FIXUP || TimestampMode == TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_NO_FIXUP )
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{
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//actually this code is ok only if we are guaranteed that no thread scheduling will take place.
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CurrentCpu = KeGetCurrentProcessorNumber();
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dst->tv_sec = data->start[CurrentCpu].tv_sec + tmp;
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dst->tv_usec = data->start[CurrentCpu].tv_usec + ( LONG )(( PTime.QuadPart % TimeFreq.QuadPart )* 1000000 / TimeFreq.QuadPart );
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if ( dst->tv_usec >= 1000000 )
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{
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dst->tv_sec ++;
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dst->tv_usec -= 1000000;
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}
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if ( TimestampMode == TIMESTAMPMODE_SYNCHRONIZATION_ON_CPU_WITH_FIXUP )
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{
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if ( old_ts.tv_sec > dst->tv_sec || ( old_ts.tv_sec == dst->tv_sec && old_ts.tv_usec > dst->tv_usec ) )
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* dst = old_ts;
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else
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old_ts = * dst;
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}
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}
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else
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{ //it should be only the normal case i.e. TIMESTAMPMODE_SINGLESYNCHRONIZATION
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dst->tv_sec = data->start[0].tv_sec + tmp;
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dst->tv_usec = data->start[0].tv_usec + ( LONG )(( PTime.QuadPart % TimeFreq.QuadPart )* 1000000 / TimeFreq.QuadPart );
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if ( dst->tv_usec >= 1000000 )
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{
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dst->tv_sec ++;
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dst->tv_usec -= 1000000;
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}
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}
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}
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//
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// inline assembler is not supported with the current AMD64 compilers
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|
|
// At the moment we simply disable this timestamping mode on AMD64.
|
||
|
|
// A solution would be to allocate a small memory from the non-paged
|
||
|
|
// pool, dump the instructions on that buffer, and then execute them.
|
||
|
|
// The non paged pool is needed since it's the only area of kernel
|
||
|
|
// data memory that is not subject to the NX protection.
|
||
|
|
// Or use some lower level trick, like using an assembler to assemble
|
||
|
|
// a small function for this.
|
||
|
|
//
|
||
|
|
|
||
|
|
#ifdef _X86_
|
||
|
|
__inline void GetTimeRDTSC( struct timeval * dst, struct time_conv * data )
|
||
|
|
{
|
||
|
|
ULONGLONG tmp = 0;
|
||
|
|
__asm
|
||
|
|
{
|
||
|
|
push eax
|
||
|
|
push edx
|
||
|
|
push ecx
|
||
|
|
rdtsc
|
||
|
|
lea ecx, tmp
|
||
|
|
mov [ecx + 4], edx
|
||
|
|
mov [ecx], eax
|
||
|
|
pop ecx
|
||
|
|
pop edx
|
||
|
|
pop eax
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( data->reference == 0 )
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
dst->tv_sec = ( LONG )( tmp / data->reference );
|
||
|
|
|
||
|
|
dst->tv_usec = ( LONG )(( tmp - dst->tv_sec * data->reference )* 1000000 / data->reference );
|
||
|
|
|
||
|
|
dst->tv_sec += data->start[0].tv_sec;
|
||
|
|
|
||
|
|
dst->tv_usec += data->start[0].tv_usec;
|
||
|
|
|
||
|
|
if ( dst->tv_usec >= 1000000 )
|
||
|
|
{
|
||
|
|
dst->tv_sec ++;
|
||
|
|
dst->tv_usec -= 1000000;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif //_X86_
|
||
|
|
|
||
|
|
__inline void GetTimeQST( struct timeval * dst, struct time_conv * data )
|
||
|
|
{
|
||
|
|
LARGE_INTEGER SystemTime;
|
||
|
|
|
||
|
|
KeQuerySystemTime(& SystemTime );
|
||
|
|
|
||
|
|
dst->tv_sec = ( LONG )( SystemTime.QuadPart / 10000000 - 11644473600 );
|
||
|
|
dst->tv_usec = ( LONG )(( SystemTime.QuadPart % 10000000 )/ 10 );
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma optimize ("g",on) //Due to some weird behaviour of the optimizer of DDK build 2600
|
||
|
|
|
||
|
|
__inline void GET_TIME( struct timeval * dst, struct time_conv * data )
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// This timestamp mode is supported on x86 (32 bit) only
|
||
|
|
//
|
||
|
|
#ifdef _X86_
|
||
|
|
if ( TimestampMode == TIMESTAMPMODE_RDTSC )
|
||
|
|
{
|
||
|
|
GetTimeRDTSC( dst, data );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
#endif // _X86_
|
||
|
|
if ( TimestampMode == TIMESTAMPMODE_QUERYSYSTEMTIME )
|
||
|
|
{
|
||
|
|
GetTimeQST( dst, data );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
GetTimeKQPC( dst, data );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /*WIN_NT_DRIVER*/
|
||
|
|
|
||
|
|
__inline void FORCE_TIME( struct timeval * src, struct time_conv * dest )
|
||
|
|
{
|
||
|
|
dest->start[0] = * src;
|
||
|
|
}
|
||
|
|
|
||
|
|
__inline void GET_TIME( struct timeval * dst, struct time_conv * data )
|
||
|
|
{
|
||
|
|
* dst = data->start[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /*WIN_NT_DRIVER*/
|
||
|
|
|
||
|
|
#endif /*_time_calls*/
|