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windows-nt/Source/XPSP1/NT/ds/security/services/w32time/parser/ntpparser.cpp
CryptoAlgo Inc b3cac27891 Add source files
2020-09-26 16:20:57 +08:00

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//--------------------------------------------------------------------
// NtpParser - implementation
// Copyright (C) Microsoft Corporation, 2000
//
// Created by: Louis Thomas (louisth), 2-29-00
// Based upon the parser created by kumarp, 23-June-1999
//
// NTP parser for NetMon
//
#include <windows.h>
#include <netmon.h>
#include <parser.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "..\lib\EndianSwap.inl"
//#define MODULEPRIVATE static // so statics show up in VC
#define MODULEPRIVATE // statics don't show up in ntsd either!
#define ARRAYSIZE(a) (sizeof(a)/sizeof(a[0]))
//--------------------------------------------------------------------
// Forward declarations
VOID WINAPIV Ntp_FormatSummary(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatNtpTime(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatStratum(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatPollInterval(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatPrecision(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatRootDelay(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatRootDispersion(LPPROPERTYINST pPropertyInst);
VOID WINAPIV Ntp_FormatRefId(LPPROPERTYINST pPropertyInst);
//--------------------------------------------------------------------
// Property Value Labels
// Leap Indicator
LABELED_BYTE NtpLIVals[]={
{0xc0, NULL},
{0x00, "LI: no warning"},
{0x40, "LI: last minute has 61 seconds"},
{0x80, "LI: last minute has 59 seconds"},
{0xc0, "LI: clock not synchronized"},
};
SET NtpLISet={ARRAYSIZE(NtpLIVals), NtpLIVals};
// Version
LABELED_BYTE NtpVersionVals[]={
{0x38, NULL},
{0x00, "Version: 0"},
{0x08, "Version: 1"},
{0x10, "Version: 2"},
{0x18, "Version: 3"},
{0x20, "Version: 4"},
{0x28, "Version: 5"},
{0x30, "Version: 6"},
{0x38, "Version: 7"},
};
SET NtpVersionSet={ARRAYSIZE(NtpVersionVals), NtpVersionVals};
// Mode
LABELED_BYTE NtpModeVals[]={
{7, NULL},
{0, "Mode: reserved"},
{1, "Mode: symmetric active"},
{2, "Mode: symmetric passive"},
{3, "Mode: client"},
{4, "Mode: server"},
{5, "Mode: broadcast"},
{6, "Mode: reserved for NTP control message"},
{7, "Mode: reserved for private use"},
};
SET NtpModeSet={ARRAYSIZE(NtpModeVals), NtpModeVals};
enum {
NTP_MODE_Reserved=0,
NTP_MODE_SymmetricActive,
NTP_MODE_SymmetricPassive,
NTP_MODE_Client,
NTP_MODE_Server,
NTP_MODE_Broadcast,
NTP_MODE_Control,
NTP_MODE_Private,
};
//--------------------------------------------------------------------
// property ordinals (These must be kept in sync with the contents of NtpPropertyTable)
enum {
Ntp_Summary=0,
Ntp_LeapIndicator,
Ntp_Version,
Ntp_Mode,
Ntp_Stratum,
Ntp_PollInterval,
Ntp_Precision,
Ntp_RootDelay,
Ntp_RootDispersion,
Ntp_RefId,
Ntp_ReferenceTimeStamp,
Ntp_OriginateTimeStamp,
Ntp_ReceiveTimeStamp,
Ntp_TransmitTimeStamp
};
// Properties
PROPERTYINFO NtpPropertyTable[]={
{
0, 0,
"Summary",
"Summary of the NTP Packet",
PROP_TYPE_SUMMARY,
PROP_QUAL_NONE,
NULL,
80, // max string size
Ntp_FormatSummary
}, {
0, 0,
"LI",
"Leap Indicator",
PROP_TYPE_BYTE,
PROP_QUAL_LABELED_BITFIELD,
&NtpLISet,
80,
FormatPropertyInstance
}, {
0, 0,
"Version",
"NTP Version",
PROP_TYPE_BYTE,
PROP_QUAL_LABELED_BITFIELD,
&NtpVersionSet,
80,
FormatPropertyInstance
}, {
0, 0,
"Mode",
"Mode",
PROP_TYPE_BYTE,
PROP_QUAL_LABELED_BITFIELD,
&NtpModeSet,
80,
FormatPropertyInstance
}, {
0, 0,
"Stratum",
"Stratum",
PROP_TYPE_BYTE,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatStratum
}, {
0, 0,
"Poll Interval",
"Maximum interval between two successive messages",
PROP_TYPE_BYTE,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatPollInterval
}, {
0, 0,
"Precision",
"Precision of the local clock",
PROP_TYPE_BYTE,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatPrecision
}, {
0, 0,
"Root Delay",
"Total roundtrip delay to the primary reference source",
PROP_TYPE_DWORD,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatRootDelay
}, {
0, 0,
"Root Dispersion",
"Nominal error relative to the primary reference source",
PROP_TYPE_DWORD,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatRootDispersion
}, {
0, 0,
"Reference Identifier",
"Reference source identifier",
PROP_TYPE_DWORD,
PROP_QUAL_NONE,
NULL,
80,
Ntp_FormatRefId
}, {
0, 0,
"Reference Timestamp",
"Time server was last synchronized",
PROP_TYPE_LARGEINT,
PROP_QUAL_NONE,
NULL,
150,
Ntp_FormatNtpTime
}, {
0, 0,
"Originate Timestamp",
"Time at client when packet was transmitted",
PROP_TYPE_LARGEINT,
PROP_QUAL_NONE,
NULL,
150,
Ntp_FormatNtpTime
}, {
0, 0,
"Receive Timestamp",
"Time at server when packet was received",
PROP_TYPE_LARGEINT,
PROP_QUAL_NONE,
NULL,
150,
Ntp_FormatNtpTime
}, {
0, 0,
"Transmit Timestamp",
"Time at server when packet was transmitted",
PROP_TYPE_LARGEINT,
PROP_QUAL_NONE,
NULL,
150,
Ntp_FormatNtpTime
},
};
//####################################################################
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatSummary(LPPROPERTYINST pPropertyInst) {
BYTE bMode=(*pPropertyInst->lpByte)&7;
switch (bMode) {
case NTP_MODE_Client:
lstrcpy(pPropertyInst->szPropertyText, "Client request");
break;
case NTP_MODE_Server:
lstrcpy(pPropertyInst->szPropertyText, "Server response");
break;
case NTP_MODE_SymmetricActive:
lstrcpy(pPropertyInst->szPropertyText, "Active request");
break;
case NTP_MODE_SymmetricPassive:
lstrcpy(pPropertyInst->szPropertyText, "Passive reponse");
break;
case NTP_MODE_Broadcast:
lstrcpy(pPropertyInst->szPropertyText, "Time broadcast");
break;
default:
lstrcpy(pPropertyInst->szPropertyText, "Other NTP packet");
break;
}
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatStratum(LPPROPERTYINST pPropertyInst) {
unsigned __int8 nStratum=(*pPropertyInst->lpByte);
char * szMeaning;
if (0==nStratum) {
szMeaning="unspecified or unavailable";
} else if (1==nStratum) {
szMeaning="primary reference (syncd by radio clock)";
} else if (nStratum<16) {
szMeaning="secondary reference (syncd by NTP)";
} else {
szMeaning="reserved";
}
wsprintf(pPropertyInst->szPropertyText, "Stratum: 0x%02X = %u = %s", nStratum, nStratum, szMeaning);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatPollInterval(LPPROPERTYINST pPropertyInst) {
char * szMeaning;
char szBuf[30];
signed __int8 nPollInterval=(*pPropertyInst->lpByte);
if (0==nPollInterval) {
szMeaning="unspecified";
} else if (nPollInterval<4 || nPollInterval>14) {
szMeaning="out of valid range";
} else {
wsprintf(szBuf, "%ds", 1<<nPollInterval);
szMeaning=szBuf;
}
wsprintf(pPropertyInst->szPropertyText, "Poll Interval: 0x%02X = %d = %s", (unsigned __int8)nPollInterval, nPollInterval, szMeaning);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatPrecision(LPPROPERTYINST pPropertyInst) {
char * szMeaning;
char szBuf[30];
signed __int8 nPrecision=(*pPropertyInst->lpByte);
if (0==nPrecision) {
szMeaning="unspecified";
} else if (nPrecision>-2 || nPrecision<-31) {
szMeaning="out of valid range";
} else {
szMeaning=szBuf;
char * szUnit="s";
double dTickInterval=1.0/(1<<(-nPrecision));
if (dTickInterval<1) {
dTickInterval*=1000;
szUnit="ms";
}
if (dTickInterval<1) {
dTickInterval*=1000;
szUnit="<EFBFBD>s";
}
if (dTickInterval<1) {
dTickInterval*=1000;
szUnit="ns";
}
sprintf(szBuf, "%g%s per tick", dTickInterval, szUnit);
}
wsprintf(pPropertyInst->szPropertyText, "Precision: 0x%02X = %d = %s", (unsigned __int8)nPrecision, nPrecision, szMeaning);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatRootDelay(LPPROPERTYINST pPropertyInst) {
char * szMeaning;
char szBuf[30];
DWORD dwRootDelay=EndianSwap((unsigned __int32)*pPropertyInst->lpDword);
if (0==dwRootDelay) {
szMeaning="unspecified";
} else {
szMeaning=szBuf;
sprintf(szBuf, "%gs", ((double)((signed __int32)dwRootDelay))/0x00010000);
}
wsprintf(pPropertyInst->szPropertyText, "Root Delay: 0x%04X.%04Xs = %s", dwRootDelay>>16, dwRootDelay&0x0000FFFF, szMeaning);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatRootDispersion(LPPROPERTYINST pPropertyInst) {
char * szMeaning;
char szBuf[30];
DWORD dwRootDispersion=EndianSwap((unsigned __int32)*pPropertyInst->lpDword);
if (0==dwRootDispersion) {
szMeaning="unspecified";
} else {
szMeaning=szBuf;
sprintf(szBuf, "%gs", ((double)((signed __int32)dwRootDispersion))/0x00010000);
}
wsprintf(pPropertyInst->szPropertyText, "Root Dispersion: 0x%04X.%04Xs = %s", dwRootDispersion>>16, dwRootDispersion&0x0000FFFF, szMeaning);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatRefId(LPPROPERTYINST pPropertyInst) {
char * szMeaning;
char szBuf[30];
DWORD dwRefID=EndianSwap((unsigned __int32)*pPropertyInst->lpDword);
unsigned __int8 nStratum=*(pPropertyInst->lpByte-11);
unsigned int nVersion=*(pPropertyInst->lpByte-12);
nVersion&=0x38;
nVersion>>=3;
if (0==dwRefID) {
szMeaning="unspecified";
} else if (0==nStratum || 1==nStratum) {
szMeaning=szBuf;
char szId[5];
szId[0]=pPropertyInst->lpByte[0];
szId[1]=pPropertyInst->lpByte[1];
szId[2]=pPropertyInst->lpByte[2];
szId[3]=pPropertyInst->lpByte[3];
szId[4]='\0';
sprintf(szBuf, "source name: \"%s\"", szId);
} else if (nVersion<4) {
szMeaning=szBuf;
sprintf(szBuf, "source IP: %u.%u.%u.%u",
pPropertyInst->lpByte[0], pPropertyInst->lpByte[1],
pPropertyInst->lpByte[2], pPropertyInst->lpByte[3]);
} else {
szMeaning=szBuf;
sprintf(szBuf, "last reference timestamp fraction: %gs", ((double)dwRefID)/(4294967296.0));
}
wsprintf(pPropertyInst->szPropertyText, "Reference Identifier: 0x%08X = %s", dwRefID, szMeaning);
}
//--------------------------------------------------------------------
// conversion constants
#define NTPTIMEOFFSET (0x014F373BFDE04000)
#define FIVETOTHESEVETH (0x001312D)
//--------------------------------------------------------------------
// convert from big-endian NTP-stye timestamp to little-endian NT-style timestamp
unsigned __int64 NtTimeFromNtpTime(unsigned __int64 qwNtpTime) {
//return (qwNtpTime*(10**7)/(2**32))+NTPTIMEOFFSET
// ==>
//return (qwNtpTime*(5**7)/(2**25))+NTPTIMEOFFSET
// ==>
//return ((qwNTPtime*FIVETOTHESEVETH)>>25)+NTPTIMEOFFSET;
// ==>
// Note: 'After' division, we round (instead of truncate) the result for better precision
unsigned __int64 qwTemp;
qwNtpTime=EndianSwap(qwNtpTime);
qwTemp=((qwNtpTime&0x00000000FFFFFFFF)*FIVETOTHESEVETH);
qwTemp += qwTemp&0x0000000001000000; //rounding step: if 25th bit is set, round up
return (qwTemp>>25) + (((qwNtpTime>>32)*FIVETOTHESEVETH)<<7) + NTPTIMEOFFSET;
}
//--------------------------------------------------------------------
void FormatNtTimeStr(unsigned __int64 qwNtTime, char * szTime) {
DWORD dwNanoSecs, dwSecs, dwMins, dwHours, dwDays;
dwNanoSecs=(DWORD)(qwNtTime%10000000);
qwNtTime/=10000000;
dwSecs=(DWORD)(qwNtTime%60);
qwNtTime/=60;
dwMins=(DWORD)(qwNtTime%60);
qwNtTime/=60;
dwHours=(DWORD)(qwNtTime%24);
dwDays=(DWORD)(qwNtTime/24);
wsprintf(szTime, "%u %02u:%02u:%02u.%07us",
dwDays, dwHours, dwMins, dwSecs, dwNanoSecs);
}
//--------------------------------------------------------------------
VOID WINAPIV Ntp_FormatNtpTime(LPPROPERTYINST pPropertyInst) {
LARGE_INTEGER liNtpTime;
unsigned __int64 qwNtTime;
unsigned __int64 qwNtTimeEpoch;
char szTime[64];
char szTimeEpoch[64];
liNtpTime=*pPropertyInst->lpLargeInt;
qwNtTime=NtTimeFromNtpTime((((unsigned __int64) liNtpTime.HighPart) << 32) |
liNtpTime.LowPart);
if (liNtpTime.HighPart || liNtpTime.LowPart) {
FormatNtTimeStr(qwNtTime, szTime);
} else {
lstrcpy(szTime, "(not specified)");
}
wsprintf(szTimeEpoch, " -- %I64d00ns",
((((unsigned __int64)liNtpTime.HighPart) << 32) | liNtpTime.LowPart));;
wsprintf(pPropertyInst->szPropertyText, "%s: 0x%08X.%08Xs %s = %s",
pPropertyInst->lpPropertyInfo->Label,
EndianSwap((unsigned __int32)liNtpTime.LowPart),
EndianSwap((unsigned __int32)liNtpTime.HighPart),
szTimeEpoch,
szTime);
}
//####################################################################
//--------------------------------------------------------------------
// Create our property database and handoff sets.
void BHAPI Ntp_Register(HPROTOCOL hNtp) {
unsigned int nIndex;
// tell netmon to make reserve some space for our property table
CreatePropertyDatabase(hNtp, ARRAYSIZE(NtpPropertyTable));
// add our properties to netmon's database
for(nIndex=0; nIndex<ARRAYSIZE(NtpPropertyTable); nIndex++) {
AddProperty(hNtp, &NtpPropertyTable[nIndex]);
}
}
//--------------------------------------------------------------------
// Destroy our property database and handoff set
VOID WINAPI Ntp_Deregister(HPROTOCOL hNtp) {
// tell netmon that it may now free our database
DestroyPropertyDatabase(hNtp);
}
//--------------------------------------------------------------------
// Determine whether we exist in the frame at the spot
// indicated. We also indicate who (if anyone) follows us
// and how much of the frame we claim.
LPBYTE BHAPI Ntp_RecognizeFrame(HFRAME hFrame, ULPBYTE pMacFrame, ULPBYTE pNtpFrame, DWORD MacType, DWORD BytesLeft, HPROTOCOL hPrevProtocol, DWORD nPrevProtOffset, LPDWORD pProtocolStatus, LPHPROTOCOL phNextProtocol, PDWORD_PTR InstData) {
// For now, just assume that if we got called,
// then the packet does contain us and we go to the end of the frame
*pProtocolStatus=PROTOCOL_STATUS_CLAIMED;
return NULL;
}
//--------------------------------------------------------------------
// Indicate where in the frame each of our properties live.
LPBYTE BHAPI Ntp_AttachProperties(HFRAME hFrame, ULPBYTE pMacFrame, ULPBYTE pNtpFrame, DWORD MacType, DWORD BytesLeft, HPROTOCOL hPrevProtocol, DWORD nPrevProtOffset, DWORD_PTR InstData) {
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_Summary].hProperty, (WORD)BytesLeft, (LPBYTE)pNtpFrame, 0, 0, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_LeapIndicator].hProperty, (WORD)1, (LPBYTE) pNtpFrame, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_Version].hProperty, (WORD)1, (LPBYTE) pNtpFrame, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_Mode].hProperty, (WORD)1, (LPBYTE) pNtpFrame, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_Stratum].hProperty, (WORD)1, (LPBYTE) pNtpFrame+1, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_PollInterval].hProperty, (WORD)1, (LPBYTE) pNtpFrame+2, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_Precision].hProperty, (WORD)1, (LPBYTE) pNtpFrame+3, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_RootDelay].hProperty, (WORD)4, (LPBYTE) pNtpFrame+4, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_RootDispersion].hProperty, (WORD)4, (LPBYTE) pNtpFrame+8, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_RefId].hProperty, (WORD)4, (LPBYTE) pNtpFrame+12, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_ReferenceTimeStamp].hProperty, (WORD)8, (LPBYTE) pNtpFrame+16, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_OriginateTimeStamp].hProperty, (WORD) 8, (LPBYTE) pNtpFrame+24, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_ReceiveTimeStamp].hProperty, (WORD) 8, (LPBYTE) pNtpFrame+32, 0, 1, 0);
AttachPropertyInstance(hFrame, NtpPropertyTable[Ntp_TransmitTimeStamp].hProperty, (WORD) 8, (LPBYTE) pNtpFrame+40, 0, 1, 0);
return NULL;
}
//--------------------------------------------------------------------
// Format the given properties on the given frame.
DWORD BHAPI Ntp_FormatProperties(HFRAME hFrame, ULPBYTE pMacFrame, ULPBYTE pNtpFrame, DWORD nPropertyInsts, LPPROPERTYINST p) {
// loop through the property instances
while(nPropertyInsts-->0) {
// and call the formatter for each
((FORMAT)(p->lpPropertyInfo->InstanceData))(p);
p++;
}
return NMERR_SUCCESS;
}
//####################################################################
//--------------------------------------------------------------------
// AutoInstall - return all of the information neede to install us
PPF_PARSERDLLINFO WINAPI ParserAutoInstallInfo() {
PPF_PARSERDLLINFO pParserDllInfo;
PPF_PARSERINFO pParserInfo;
DWORD NumProtocols;
DWORD NumHandoffs;
PPF_HANDOFFSET pHandoffSet;
PPF_HANDOFFENTRY pHandoffEntry;
// Allocate memory for parser info:
NumProtocols=1;
pParserDllInfo=(PPF_PARSERDLLINFO)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(PF_PARSERDLLINFO) +
NumProtocols * sizeof(PF_PARSERINFO));
if(pParserDllInfo==NULL) {
return NULL;
}
// fill in the parser DLL info
pParserDllInfo->nParsers=NumProtocols;
// fill in the individual parser infos...
// Ntp ==============================================================
pParserInfo=&(pParserDllInfo->ParserInfo[0]);
wsprintf(pParserInfo->szProtocolName, "NTP");
wsprintf(pParserInfo->szComment, "Network Time Protocol");
wsprintf(pParserInfo->szHelpFile, "");
// the incoming handoff set ----------------------------------------------
// allocate
NumHandoffs = 1;
pHandoffSet = (PPF_HANDOFFSET)HeapAlloc( GetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof( PF_HANDOFFSET ) +
NumHandoffs * sizeof( PF_HANDOFFENTRY) );
if( pHandoffSet == NULL )
{
// just return early
return pParserDllInfo;
}
// fill in the incoming handoff set
pParserInfo->pWhoHandsOffToMe = pHandoffSet;
pHandoffSet->nEntries = NumHandoffs;
pHandoffEntry = &(pHandoffSet->Entry[0]);
wsprintf( pHandoffEntry->szIniFile, "TCPIP.INI" );
wsprintf( pHandoffEntry->szIniSection, "UDP_HandoffSet" );
wsprintf( pHandoffEntry->szProtocol, "NTP" );
pHandoffEntry->dwHandOffValue = 123;
pHandoffEntry->ValueFormatBase = HANDOFF_VALUE_FORMAT_BASE_DECIMAL;
return pParserDllInfo;
}
//--------------------------------------------------------------------
// Tell netmon about our entry points.
extern "C" BOOL WINAPI DllMain(HANDLE hInstance, ULONG Command, LPVOID Reserved) {
//MessageBox(NULL, "DLLEntry", "NTP ha ha", MB_OK);
static HPROTOCOL hNtp=NULL;
static unsigned int nAttached=0;
// what type of call is this
switch(Command) {
case DLL_PROCESS_ATTACH:
// are we loading for the first time?
if (nAttached==0) {
// the first time in we need to tell netmon
// about ourselves
ENTRYPOINTS NtpEntryPoints={
Ntp_Register,
Ntp_Deregister,
Ntp_RecognizeFrame,
Ntp_AttachProperties,
Ntp_FormatProperties
};
hNtp=CreateProtocol("NTP", &NtpEntryPoints, ENTRYPOINTS_SIZE);
}
nAttached++;
break;
case DLL_PROCESS_DETACH:
nAttached--;
// are we detaching our last instance?
if (nAttached==0) {
// last guy out needs to clean up
DestroyProtocol(hNtp);
}
break;
}
// Netmon parsers ALWAYS return TRUE.
return TRUE;
}
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