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195 lines
3.9 KiB
195 lines
3.9 KiB
/*++
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Copyright (c) 2003 Microsoft Corporation. All rights reserved.
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Module Name:
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FailSocket.cpp
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Abstract:
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This shim fails the socket call. (Goodnight Gracie...)
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Writes a message to the event log.
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Notes:
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This is a general purpose shim.
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History:
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01/30/2003 mnikkel, rparsons Created
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02/21/2003 robkenny Second attempt, fail WSAStartup
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(FailSocket)
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#include "ShimHookMacro.h"
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#include "acmsg.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(WSAStartup)
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APIHOOK_ENUM_ENTRY(WSACleanup)
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APIHOOK_ENUM_ENTRY(WSAEnumProtocolsA)
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APIHOOK_ENUM_ENTRY(socket)
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APIHOOK_ENUM_END
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//
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// Contains the name of the source from the registry.
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// This is passed on the command-line from the XML.
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// It appears in the 'Source' column in the Event Viewer.
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//
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CString* g_pcsEventSourceName = NULL;
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/*++
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Responsible for making the actual entry in the event log.
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--*/
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void
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MakeEventLogEntry(
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void
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)
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{
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HANDLE hEventLog = NULL;
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BOOL bResult;
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//
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// Get a handle to the event log on the local computer.
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//
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hEventLog = RegisterEventSource(NULL, g_pcsEventSourceName->Get());
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if (NULL == hEventLog) {
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LOGN(eDbgLevelError,
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"[MakeEventLogEntry] 0x%08X Failed to register event source",
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GetLastError());
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goto cleanup;
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}
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//
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// Write the event to the event log.
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//
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bResult = ReportEvent(hEventLog,
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EVENTLOG_INFORMATION_TYPE,
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0,
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ID_SQL_PORTS_DISABLED,
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NULL,
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0,
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0,
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NULL,
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NULL);
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if (!bResult) {
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LOGN(eDbgLevelError,
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"[MakeEventLogEntry] 0x%08X Failed to make event log entry",
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GetLastError());
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goto cleanup;
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}
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cleanup:
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if (hEventLog) {
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DeregisterEventSource(hEventLog);
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hEventLog = NULL;
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}
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}
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// Tell the app that there are no protocols available.
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int
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APIHOOK(WSAEnumProtocolsA)(
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LPINT lpiProtocols,
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LPWSAPROTOCOL_INFO lpProtocolBuffer,
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LPDWORD lpdwBufferLength
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)
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{
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if (lpProtocolBuffer == NULL && lpiProtocols == NULL)
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{
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*lpdwBufferLength = 1; // SSnetlib.dll will allocate this much data for the struct
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}
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else
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{
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MakeEventLogEntry();
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}
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// There are not protocols available.
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LOGN(eDbgLevelError, "WSAEnumProtocolsA returning 0");
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return 0;
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}
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// Noop the call to WSAStartup, but return success
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int
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APIHOOK(WSAStartup)(
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WORD wVersionRequested,
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LPWSADATA lpWSAData
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)
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{
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MakeEventLogEntry();
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LOGN(eDbgLevelError, "WSAStartup call has been prevented");
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return 0;
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}
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// Since we noop WSAStartup, we must noop WSACleanup
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int
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APIHOOK(WSACleanup) (void)
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{
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return 0;
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}
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SOCKET
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APIHOOK(socket)(
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int af,
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int type,
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int protocol
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)
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{
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LOGN(eDbgLevelError,
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"Failing socket call: af = %d type = %d protocol = %d",
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af,
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type,
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protocol);
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MakeEventLogEntry();
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WSASetLastError(WSAENETDOWN);
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return INVALID_SOCKET;
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason
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)
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{
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if (fdwReason == DLL_PROCESS_ATTACH)
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{
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CSTRING_TRY
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{
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g_pcsEventSourceName = new CString(COMMAND_LINE);
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}
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CSTRING_CATCH
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{
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return FALSE;
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}
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}
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return TRUE;
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}
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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APIHOOK_ENTRY(WSOCK32.DLL, socket)
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APIHOOK_ENTRY(Wsock32.DLL, WSAStartup)
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APIHOOK_ENTRY(Wsock32.DLL, WSACleanup)
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APIHOOK_ENTRY(Ws2_32.DLL, WSAEnumProtocolsA)
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HOOK_END
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IMPLEMENT_SHIM_END
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