512 lines
11 KiB
C
512 lines
11 KiB
C
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/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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Abstract:
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Author:
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Revision History:
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--*/
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#include "allinc.h"
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//
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// Definitions for external declarations
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//
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DWORD g_uptimeReference;
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#ifdef MIB_DEBUG
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DWORD g_hTrace=INVALID_TRACEID;
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#endif
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HANDLE g_hPollTimer;
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RTL_RESOURCE g_LockTable[NUM_LOCKS];
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#ifdef DEADLOCK_DEBUG
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PBYTE g_pszLockNames[NUM_LOCKS] = {"System Group Lock",
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"IF Lock",
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"IP Address Lock",
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"Forwarding Lock",
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"ARP Lock",
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"TCP Lock",
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"UDP Lock",
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"New TCP Lock",
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"UDP6 Listener Lock",
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"Trap Table Lock"};
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#endif // DEADLOCK_DEBUG
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DWORD g_dwLastUpdateTable[NUM_CACHE] = { 0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0};
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DWORD g_dwTimeoutTable[NUM_CACHE] = {SYSTEM_CACHE_TIMEOUT,
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IF_CACHE_TIMEOUT,
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IP_ADDR_CACHE_TIMEOUT,
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IP_FORWARD_CACHE_TIMEOUT,
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IP_NET_CACHE_TIMEOUT,
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TCP_CACHE_TIMEOUT,
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UDP_CACHE_TIMEOUT,
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TCP_CACHE_TIMEOUT,
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UDP_CACHE_TIMEOUT};
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PFNLOAD_FUNCTION g_pfnLoadFunctionTable[] = { LoadSystem,
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LoadIfTable,
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LoadIpAddrTable,
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LoadIpForwardTable,
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LoadIpNetTable,
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LoadTcpTable,
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LoadUdpTable,
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LoadTcp6Table,
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LoadUdp6ListenerTable};
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MIB_CACHE g_Cache = { NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL};
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HANDLE g_hPrivateHeap;
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SnmpTfxHandle g_tfxHandle;
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UINT g_viewIndex = 0;
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PMIB_IFSTATUS g_pisStatusTable;
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DWORD g_dwValidStatusEntries;
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DWORD g_dwTotalStatusEntries;
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BOOL g_bFirstTime;
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BOOL
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Mib2DLLEntry(
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HANDLE hInst,
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DWORD ul_reason_being_called,
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LPVOID lpReserved
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)
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{
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DWORD i;
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switch (ul_reason_being_called)
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{
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case DLL_PROCESS_ATTACH:
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{
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DisableThreadLibraryCalls(hInst);
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g_pisStatusTable = NULL;
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g_dwValidStatusEntries = 0;
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g_dwTotalStatusEntries = 0;
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g_hPollTimer = NULL;
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g_bFirstTime = TRUE;
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//
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// Create the private heap. If it fails, deregister the trace
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// handle
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//
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g_hPrivateHeap = HeapCreate(0,
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4*1024,
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0);
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if(g_hPrivateHeap is NULL)
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{
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//
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// Deregister the trace handle
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//
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#ifdef MIB_DEBUG
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if(g_hTrace isnot INVALID_TRACEID)
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{
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TraceDeregister(g_hTrace);
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g_hTrace = INVALID_TRACEID;
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}
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#endif
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return FALSE;
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}
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for(i = 0; i < NUM_LOCKS; i++)
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{
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RtlInitializeResource(&g_LockTable[i]);
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}
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break ;
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}
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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{
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//
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// not of interest.
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//
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break;
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}
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case DLL_PROCESS_DETACH:
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{
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#ifdef MIB_DEBUG
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if(g_hTrace isnot INVALID_TRACEID)
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{
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TraceDeregister(g_hTrace);
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g_hTrace = INVALID_TRACEID;
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}
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#endif
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if(g_hPrivateHeap)
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{
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HeapDestroy(g_hPrivateHeap);
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}
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if(g_hPollTimer isnot NULL)
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{
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//
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// We had created an timer object
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//
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CloseHandle(g_hPollTimer);
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g_hPollTimer = NULL;
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}
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for(i = 0; i < NUM_LOCKS; i++)
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{
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RtlDeleteResource(&g_LockTable[i]);
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}
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break;
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}
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}
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return TRUE;
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}
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DWORD
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GetPollTime(
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VOID
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)
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/*++
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Routine Description
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This function
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Locks
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None
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Arguments
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None
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Return Value
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None
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--*/
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{
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DWORD dwResult, dwSize, dwValue, dwDisposition, dwType;
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HKEY hkeyPara;
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WCHAR wszPollValue[256];
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dwResult = RegCreateKeyEx(HKEY_LOCAL_MACHINE,
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REG_KEY_MIB2SUBAGENT_PARAMETERS,
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0,
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NULL,
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0,
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KEY_ALL_ACCESS,
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NULL,
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&hkeyPara,
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&dwDisposition);
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if(dwResult isnot NO_ERROR)
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{
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//
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// Couldnt open/create key just return default value
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//
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return DEFAULT_POLL_TIME;
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}
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//
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// Try and read the Poll time. If the value doesnt exist, write
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// the default in
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//
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dwSize = sizeof(DWORD);
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dwResult = RegQueryValueExW(hkeyPara,
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REG_VALUE_POLL,
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0,
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&dwType,
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(LPBYTE)(&dwValue),
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&dwSize);
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if((dwResult isnot NO_ERROR) or
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(dwType isnot REG_DWORD) or
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(dwValue < MIN_POLL_TIME))
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{
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//
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// Registry seems to be corrupt, or key doesnt exist or
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// The value is less than the minimum. Lets set things
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// right
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//
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dwValue = DEFAULT_POLL_TIME;
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wcscpy(wszPollValue,
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REG_VALUE_POLL);
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dwResult = RegSetValueExW(hkeyPara,
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REG_VALUE_POLL,
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0,
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REG_DWORD,
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(CONST BYTE *)(&dwValue),
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sizeof(DWORD));
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if(dwResult isnot NO_ERROR)
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{
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TRACE1("Error %d setting poll time in registry",
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dwResult);
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}
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}
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//
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// At this point dwValue is a good one read out of the registry
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// or is DEFAULT_POLL_TIME
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//
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return dwValue;
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}
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BOOL
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SnmpExtensionInit(
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IN DWORD uptimeReference,
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OUT HANDLE *lpPollForTrapEvent,
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OUT AsnObjectIdentifier *lpFirstSupportedView
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)
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{
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DWORD dwResult, dwPollTime;
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LARGE_INTEGER liRelTime;
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//
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// save the uptime reference
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//
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g_uptimeReference = uptimeReference;
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#ifdef MIB_DEBUG
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if (g_hTrace == INVALID_TRACEID)
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g_hTrace = TraceRegister("MIB-II Subagent");
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#endif
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//
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// obtain handle to subagent framework
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//
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g_tfxHandle = SnmpTfxOpen(NUM_VIEWS,v_mib2);
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//
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// validate handle
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//
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if (g_tfxHandle is NULL)
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{
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TRACE1("Error %d opening framework",
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GetLastError());
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//
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// destroy private heap
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//
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HeapDestroy(g_hPrivateHeap);
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//
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// reinitialize
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//
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g_hPrivateHeap = NULL;
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return FALSE;
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}
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//
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// pass back first view identifier to master
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//
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g_viewIndex = 0; // make sure this is reset...
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*lpFirstSupportedView = v_mib2[g_viewIndex++].viewOid;
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//
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// Update the IF cache. This is needed for the first poll
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//
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UpdateCache(MIB_II_IF);
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//
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// Trap is done by a polling timer
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//
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if(g_hPollTimer is NULL)
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{
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//
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// Do this ONLY if we had notcreated the timer from an earlier
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// initialization call
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//
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g_hPollTimer = CreateWaitableTimer(NULL,
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FALSE,
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NULL); // No name because many DLLs may load this
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if(g_hPollTimer is NULL)
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{
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TRACE1("Error %d creating poll timer for traps",
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GetLastError());
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}
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else
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{
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//
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// Read poll time from the registry. If the keys dont exist this
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// function will set up the keys and return the default value
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//
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dwPollTime = GetPollTime();
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liRelTime = RtlLargeIntegerNegate(MilliSecsToSysUnits(dwPollTime));
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if(!SetWaitableTimer(g_hPollTimer,
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&liRelTime,
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dwPollTime,
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NULL,
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NULL,
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FALSE))
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{
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TRACE1("Error %d setting timer",
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GetLastError());
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CloseHandle(g_hPollTimer);
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g_hPollTimer = NULL;
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}
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}
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}
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*lpPollForTrapEvent = g_hPollTimer;
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return TRUE;
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}
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BOOL
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SnmpExtensionInitEx(
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OUT AsnObjectIdentifier *lpNextSupportedView
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)
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{
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#ifdef MIB_DEBUG
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if (g_hTrace == INVALID_TRACEID)
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g_hTrace = TraceRegister("MIB-II Subagent");
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#endif
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//
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// check if there are views to register
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//
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BOOL fMoreViews = (g_viewIndex < NUM_VIEWS);
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if (fMoreViews)
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{
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//
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// pass back next supported view to master
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//
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*lpNextSupportedView = v_mib2[g_viewIndex++].viewOid;
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}
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//
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|
// report status
|
||
|
|
//
|
||
|
|
|
||
|
|
return fMoreViews;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
SnmpExtensionQuery(
|
||
|
|
IN BYTE requestType,
|
||
|
|
IN OUT RFC1157VarBindList *variableBindings,
|
||
|
|
OUT AsnInteger *errorStatus,
|
||
|
|
OUT AsnInteger *errorIndex
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// forward to framework
|
||
|
|
//
|
||
|
|
|
||
|
|
return SnmpTfxQuery(g_tfxHandle,
|
||
|
|
requestType,
|
||
|
|
variableBindings,
|
||
|
|
errorStatus,
|
||
|
|
errorIndex);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
SnmpExtensionTrap(
|
||
|
|
OUT AsnObjectIdentifier *enterprise,
|
||
|
|
OUT AsnInteger *genericTrap,
|
||
|
|
OUT AsnInteger *specificTrap,
|
||
|
|
OUT AsnTimeticks *timeStamp,
|
||
|
|
OUT RFC1157VarBindList *variableBindings
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD dwResult;
|
||
|
|
|
||
|
|
enterprise->idLength = 0;
|
||
|
|
enterprise->ids = NULL; // use default enterprise oid
|
||
|
|
|
||
|
|
*timeStamp = (GetCurrentTime()/10) - g_uptimeReference;
|
||
|
|
|
||
|
|
return MibTrap(genericTrap,
|
||
|
|
specificTrap,
|
||
|
|
variableBindings);
|
||
|
|
|
||
|
|
}
|