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405 lines
8.1 KiB
405 lines
8.1 KiB
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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ipxwan.c
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Abstract:
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ipxwan control
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Author:
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Stefan Solomon 02/06/1996
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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ULONG EnableUnnumberedWanLinks;
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HANDLE WorkerThreadHandle;
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// IPXCP Entry Points
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DWORD
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(WINAPI *IpxcpGetWanNetNumber)(IN OUT PUCHAR Network,
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IN OUT PULONG AllocatedNetworkIndexp,
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IN ULONG InterfaceType);
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VOID
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(WINAPI *IpxcpReleaseWanNetNumber)(ULONG AllocatedNetworkIndex);
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DWORD
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(WINAPI *IpxcpConfigDone)(ULONG ConnectionId,
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PUCHAR Network,
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PUCHAR LocalNode,
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PUCHAR RemoteNode,
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BOOL Success);
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VOID
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(WINAPI *IpxcpGetInternalNetNumber)(PUCHAR Network);
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ULONG
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(WINAPI *IpxcpGetInterfaceType)(ULONG ConnectionId);
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DWORD
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(WINAPI *IpxcpGetRemoteNode)(ULONG ConnectionId,
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PUCHAR RemoteNode);
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BOOL
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(WINAPI *IpxcpIsRoute)(PUCHAR Network);
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// worker thread waitable objects
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HANDLE hWaitableObject[MAX_WAITABLE_OBJECTS];
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VOID
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ProcessWorkItem(VOID);
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VOID
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WorkerThread(VOID);
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VOID
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ProcessDequeuedIoPacket(DWORD ErrorCode,
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DWORD BytesTransferred,
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LPOVERLAPPED Overlappedp);
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CRITICAL_SECTION DbaseCritSec;
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CRITICAL_SECTION QueuesCritSec;
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LIST_ENTRY WorkersQueue;
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// worker thread object handlers
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typedef VOID (*WOBJECT_HANDLER)(VOID);
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WOBJECT_HANDLER WaitableObjectHandler[MAX_WAITABLE_OBJECTS] = {
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AdapterNotification, // ADAPTER_NOTIFICATION_EVENT
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ProcessWorkItem, // WORKERS_QUEUE_EVENT
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ProcessTimerQueue // TIMER_HANDLE
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};
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BOOLEAN Active;
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TCHAR ModuleName[MAX_PATH+1];
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BOOL WINAPI
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IpxWanDllEntry(HINSTANCE hInstDll,
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DWORD fdwReason,
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LPVOID pReserved)
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{
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switch (fdwReason)
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{
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case DLL_PROCESS_ATTACH:
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GetModuleFileName (hInstDll, ModuleName,
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sizeof (ModuleName)/sizeof (ModuleName[0]));
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// Create the adapters hash table lock
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InitializeCriticalSection(&DbaseCritSec);
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// Create the queues lock
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InitializeCriticalSection(&QueuesCritSec);
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StartTracing();
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break;
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case DLL_PROCESS_DETACH:
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StopTracing ();
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// delete the database lock
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DeleteCriticalSection(&DbaseCritSec);
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// delete the queues lock
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DeleteCriticalSection(&QueuesCritSec);
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break;
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default:
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break;
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}
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return TRUE;
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}
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/*++
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Function: IpxwanBind
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Descr: called by IPXCP to initialize the IPXWAN module
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--*/
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DWORD
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IPXWAN_BIND_ENTRY_POINT(PIPXWAN_INTERFACE IpxwanIfp)
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{
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DWORD threadid, i;
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HANDLE ThreadHandle;
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Trace(INIT_TRACE, "IpxwanBind: Entered\n");
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EnableUnnumberedWanLinks = IpxwanIfp->EnableUnnumberedWanLinks;
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IpxcpGetWanNetNumber = IpxwanIfp->IpxcpGetWanNetNumber;
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IpxcpReleaseWanNetNumber = IpxwanIfp->IpxcpReleaseWanNetNumber;
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IpxcpConfigDone = IpxwanIfp->IpxcpConfigDone;
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IpxcpGetInternalNetNumber = IpxwanIfp->IpxcpGetInternalNetNumber;
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IpxcpGetInterfaceType = IpxwanIfp->IpxcpGetInterfaceType;
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IpxcpGetRemoteNode = IpxwanIfp->IpxcpGetRemoteNode;
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IpxcpIsRoute = IpxwanIfp->IpxcpIsRoute;
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// create the worker thread's waitable objects array
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// for the ipxwan worker thread
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for(i=0; i<MAX_EVENTS; i++) {
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if((hWaitableObject[i] = CreateEvent(NULL, FALSE, FALSE, NULL)) == NULL) {
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return ERROR_CAN_NOT_COMPLETE;
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}
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}
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if((hWaitableObject[TIMER_HANDLE] = CreateWaitableTimer(NULL, FALSE, NULL)) == NULL) {
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return ERROR_CAN_NOT_COMPLETE;
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}
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//
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// init all the queues
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//
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InitializeListHead(&WorkersQueue);
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InitializeListHead(&TimerQueue);
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// create the workers work items heap
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if(CreateWorkItemsManager() != NO_ERROR) {
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goto ErrorExit;
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}
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// open the IpxWan socket for I/O
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if(OpenIpxWanSocket() != NO_ERROR) {
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Trace(INIT_TRACE, "Cannot open IPXWAN socket\n");
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goto ErrorExit;
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}
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if(! BindIoCompletionCallback(IpxWanSocketHandle,
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ProcessDequeuedIoPacket, 0)) {
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Trace(INIT_TRACE, "Cannot associate IO CompletionPort\n");
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goto ErrorExit;
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}
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if(StartAdapterManager() != NO_ERROR) {
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Trace(INIT_TRACE, "Cannot create adapter config port\n");
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goto ErrorExit;
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}
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// create the Worker thread
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if ((WorkerThreadHandle = CreateThread(
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(LPSECURITY_ATTRIBUTES) NULL,
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0,
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(LPTHREAD_START_ROUTINE) WorkerThread,
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NULL,
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0,
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&threadid)) == NULL) {
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// !!! log error cannot create the worker thread !!!
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goto ErrorExit;
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}
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Active = TRUE;
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return NO_ERROR;
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ErrorExit:
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return ERROR_CAN_NOT_COMPLETE;
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}
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VOID
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IPXWAN_UNBIND_ENTRY_POINT (VOID) {
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Active = FALSE;
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SetEvent (hWaitableObject[WORKERS_QUEUE_EVENT]);
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Trace(INIT_TRACE, "IpxwanUnBind: Finished\n");
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}
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VOID
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WorkerThread(VOID)
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{
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INT i;
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DWORD rc;
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DWORD signaled_object;
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HINSTANCE hModule = LoadLibrary (ModuleName);
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Trace(INIT_TRACE, "IpxwanWorker: Started\n");
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StartReceiver();
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while(TRUE)
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{
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rc = WaitForMultipleObjectsEx(
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MAX_WAITABLE_OBJECTS,
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hWaitableObject,
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FALSE, // wait any
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INFINITE, // timeout
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TRUE // wait alertable, so we can run APCs
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);
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if (Active) {
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ASSERT (((int)rc>=WAIT_OBJECT_0) && (rc<WAIT_OBJECT_0+MAX_WAITABLE_OBJECTS));
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signaled_object = rc - WAIT_OBJECT_0;
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if(signaled_object < MAX_WAITABLE_OBJECTS) {
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// invoke the event handler
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(*WaitableObjectHandler[signaled_object])();
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}
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else
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SleepEx (3000, TRUE);
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}
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else
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break;
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}
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StopAdapterManager ();
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CloseIpxWanSocket ();
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DestroyWorkItemsManager ();
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for(i=0; i<MAX_WAITABLE_OBJECTS; i++) {
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CloseHandle (hWaitableObject[i]);
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}
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Trace(INIT_TRACE, "IpxwanWorker: Finished\n");
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FreeLibraryAndExitThread (hModule, 0);
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}
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VOID
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ProcessDequeuedIoPacket(DWORD ErrorCode,
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DWORD BytesTransferred,
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LPOVERLAPPED Overlappedp)
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{
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PWORK_ITEM wip;
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DWORD nBytes;
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wip = CONTAINING_RECORD(Overlappedp, WORK_ITEM, Overlapped);
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IpxAdjustIoCompletionParams (Overlappedp, &nBytes, &wip->IoCompletionStatus);
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switch(wip->Type) {
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case RECEIVE_PACKET_TYPE:
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ReceiveComplete(wip);
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break;
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default:
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SendComplete(wip);
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break;
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}
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}
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VOID
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ProcessWorkItem(VOID)
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{
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PLIST_ENTRY lep;
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PWORK_ITEM wip;
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PACB acbp;
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ACQUIRE_QUEUES_LOCK;
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while(!IsListEmpty(&WorkersQueue)) {
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lep = RemoveHeadList(&WorkersQueue);
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wip = CONTAINING_RECORD(lep, WORK_ITEM, Linkage);
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RELEASE_QUEUES_LOCK;
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switch(wip->Type) {
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case RECEIVE_PACKET_TYPE:
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ACQUIRE_DATABASE_LOCK;
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if((acbp = GetAdapterByIndex(wip->AdapterIndex)) != NULL) {
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ACQUIRE_ADAPTER_LOCK(acbp);
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RELEASE_DATABASE_LOCK;
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ProcessReceivedPacket(acbp, wip);
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RELEASE_ADAPTER_LOCK(acbp);
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}
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else
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{
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RELEASE_DATABASE_LOCK;
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}
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RepostRcvPacket(wip);
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break;
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default:
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// these are ReXmit packets referencing the adapter via ACB ptr
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acbp = wip->acbp;
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ACQUIRE_ADAPTER_LOCK(acbp);
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acbp->RefCount--;
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switch(wip->Type) {
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case SEND_PACKET_TYPE:
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ProcessReXmitPacket(wip);
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break;
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case WITIMER_TYPE:
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ProcessTimeout(wip);
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break;
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default:
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SS_ASSERT(FALSE);
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break;
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}
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if(acbp->Discarded && (acbp->RefCount == 0)) {
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ACQUIRE_DATABASE_LOCK;
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// remove the adapter from the discarded list
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RemoveEntryList(&acbp->Linkage);
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RELEASE_DATABASE_LOCK;
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Trace(ADAPTER_TRACE, "ProcessWorkItem: adpt# %d not referenced and discarded. Free CB",
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acbp->AdapterIndex);
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DeleteCriticalSection(&acbp->AdapterLock);
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GlobalFree(acbp);
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}
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else
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{
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RELEASE_ADAPTER_LOCK(acbp);
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}
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}
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ACQUIRE_QUEUES_LOCK;
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}
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RELEASE_QUEUES_LOCK;
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}
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