www.pudn.com > win2ksrc.rar > alert.c

/*++ 
 
Copyright (c) 1990  Microsoft Corporation 
 
Module Name: 
 
    ALERT.C 
 
Abstract: 
 
    This file contains the routine that sends the alert to the admin. 
 
Author: 
 
    Rajen Shah  (rajens)    28-Aug-1991 
 
 
Revision History: 
 
 
--*/ 
 
// 
// INCLUDES 
// 
 
#include  
#include  
#include                 // LAN Manager alert structures 
 
 
 
BOOL 
SendAdminAlert ( 
            ULONG   MessageID, 
            ULONG   NumStrings, 
            UNICODE_STRING  *pStrings 
            ) 
 
 
/*++ 
 
Routine Description: 
 
    This routine raises an ADMIN alert with the message specified. 
 
 
Arguments: 
 
    MessageID  - Message ID. 
    NumStrings - Number of replacement strings. 
    pStrings   - Array of UNICODE_STRING Replacement strings. 
 
Return Value: 
 
    NONE 
 
Note: 
 
    This routine dynamically links to netapi32.dll to avoid a build 
    dependency. 
 
--*/ 
{ 
 
    typedef DWORD (*ALERT_FNC_PTR)( 
        IN LPTSTR AlertEventName, 
        IN LPVOID VariableInfo, 
        IN DWORD VariableInfoSize, 
        IN LPTSTR ServiceName 
        ); 
 
 
    NET_API_STATUS NetStatus; 
 
    BYTE AlertBuffer[ELF_ADMIN_ALERT_BUFFER_SIZE + sizeof(ADMIN_OTHER_INFO)]; 
    ADMIN_OTHER_INFO UNALIGNED *VariableInfo = (PADMIN_OTHER_INFO) AlertBuffer; 
 
    DWORD DataSize; 
    DWORD i; 
    LPWSTR pReplaceString; 
 
    HANDLE dllHandle; 
    ALERT_FNC_PTR AlertFunction; 
 
    // 
    // Dynamically link to netapi.dll.  If it's not there just return.  Return 
    // TRUE so we won't try to send this alert again. 
    // 
 
    dllHandle = LoadLibraryA("NetApi32.Dll"); 
    if ( dllHandle == INVALID_HANDLE_VALUE ) { 
        ElfDbgPrint(("[ELF] Failed to load DLL NetApi32.Dll: %ld\n", 
                     GetLastError())); 
        return(TRUE); 
    } 
 
    // 
    // Get the address of the service's main entry point.  This 
    // entry point has a well-known name. 
    // 
 
    AlertFunction = (ALERT_FNC_PTR)GetProcAddress( 
                                                dllHandle, 
                                                "NetAlertRaiseEx" 
                                                ); 
    if (AlertFunction == NULL ) { 
        ElfDbgPrint(("[ELF] Can't find entry NetAlertRaiseEx in NetApi32.Dll: %ld\n", 
                     GetLastError())); 
        return(TRUE); 
 
    } 
 
    VariableInfo->alrtad_errcode = MessageID; 
    VariableInfo->alrtad_numstrings = NumStrings; 
 
    pReplaceString = (LPWSTR)(AlertBuffer + sizeof(ADMIN_OTHER_INFO)); 
 
    // 
    // Copy over the replacement strings 
    // 
 
    for (i = 0; i < NumStrings; i++) { 
        RtlMoveMemory(pReplaceString, pStrings[i].Buffer, 
            pStrings[i].MaximumLength); 
        pReplaceString = (LPWSTR) ((PBYTE) pReplaceString + 
            pStrings[i].MaximumLength); 
    } 
 
    DataSize = (DWORD) ((PBYTE) pReplaceString - (PBYTE) AlertBuffer); 
 
    NetStatus = (*AlertFunction)(ALERT_ADMIN_EVENT, 
                                 AlertBuffer, 
                                 DataSize, 
                                 EVENTLOG_SVC_NAMEW); 
 
    if (NetStatus != NERR_Success) { 
        ElfDbgPrint(("[ELF] NetAlertRaiseEx failed with %d\n", NetStatus)); 
        ElfDbgPrint(("[ELF] Attempted to raise alert %d\n", MessageID)); 
 
        // 
        // Probably just not started yet, try again later 
        // 
 
        return(FALSE); 
    } 
 
    return(TRUE); 
}