168 lines
3.6 KiB
C
168 lines
3.6 KiB
C
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/*++
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Copyright (c) 1994-2001 Microsoft Corporation
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Module Name:
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svccntl.c
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Abstract:
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Domain Name System (DNS) API
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Service control routines.
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Author:
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Glenn Curtis (glennc) 05-Jul-1997
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Revision History:
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Jim Gilroy (jamesg) March 2000 -- resolver notify
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--*/
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#include "local.h"
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//
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// DCR_CLEANUP: identical ServiceControl routine is in resolver
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// - should either expose in dnsapi.dll or in dnslib.h
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//
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DWORD
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_fastcall
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SendServiceControl(
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IN LPWSTR pszServiceName,
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IN DWORD dwControl
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)
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{
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DWORD Status = NO_ERROR;
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SC_HANDLE scManagerHandle = NULL;
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SC_HANDLE scServiceHandle = NULL;
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SERVICE_STATUS ServiceStatus;
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DNSDBG( ANY, (
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"SendServiceControl( %S, %08x )\n",
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pszServiceName,
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dwControl ));
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scManagerHandle = OpenSCManagerW( NULL,
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NULL,
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SC_MANAGER_ALL_ACCESS );
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// SC_MANAGER_CONNECT );
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if ( !scManagerHandle )
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return GetLastError();
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scServiceHandle = OpenServiceW( scManagerHandle,
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pszServiceName,
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SERVICE_ALL_ACCESS );
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// SERVICE_CHANGE_CONFIG );
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if ( !scServiceHandle )
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{
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CloseServiceHandle( scManagerHandle );
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return GetLastError();
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}
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if ( !ControlService( scServiceHandle,
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dwControl,
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&ServiceStatus ) )
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{
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Status = GetLastError();
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}
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CloseServiceHandle( scServiceHandle );
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CloseServiceHandle( scManagerHandle );
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return Status;
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}
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VOID
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DnsNotifyResolver(
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IN DWORD Flag,
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IN PVOID pReserved
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)
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/*++
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Routine Description:
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Notify resolver of configuration change.
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This allows it to wakeup and refresh its informatio and\or dump
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the cache and rebuild info.
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Arguments:
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Flag -- unused
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pReserved -- unused
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Return Value:
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None
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--*/
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{
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UNREFERENCED_PARAMETER( Flag );
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UNREFERENCED_PARAMETER( pReserved );
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DNSDBG( ANY, (
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"\nDnsNotifyResolver()\n"
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"\tFlag = %08x\n"
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"\tpReserved = %p\n"
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"\tTickCount = %d\n",
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Flag,
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pReserved,
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GetTickCount() ));
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//
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// wake the resolver
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//
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SendServiceControl(
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DNS_RESOLVER_SERVICE,
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SERVICE_CONTROL_PARAMCHANGE );
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//
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// DCR: hack for busted resolver permissions
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//
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// DCR: network change notifications
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// this is a poor mechanism for handling notification
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// - this should happen directly through SCM
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// - it won't work for IPv6 or anything else
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// probably need to move to IPHlpApi
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//
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// notify resolver
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// also notify DNS server, but wait briefly to allow resolver
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// to handle the changes as i'm not sure that the server
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// doesn't call a resolver API to do it's read
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// note, the reason the resolver doesn't notify the DNS
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// server is that since Jon Schwartz moved the resolver to
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// NetworkService account, attempts to open the SCM to
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// notify the DNS server all fail
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//
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// DCR: make sure server calls directly to avoid race
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// DCR: make sure g_IsDnsServer is current
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//
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g_IsDnsServer = Reg_IsMicrosoftDnsServer();
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if ( g_IsDnsServer )
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{
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Sleep( 1000 );
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SendServiceControl(
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DNS_SERVER_SERVICE,
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SERVICE_CONTROL_PARAMCHANGE );
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}
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}
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//
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// End srvcntl.c
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//
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