1472 lines
36 KiB
C++
1472 lines
36 KiB
C++
/*++
|
||
|
||
Copyright (c) 1996 Microsoft Corporation
|
||
|
||
Module Name :
|
||
|
||
atqendp.cxx
|
||
|
||
Abstract:
|
||
This module implements ATQ endpoints
|
||
|
||
Author:
|
||
|
||
Johnson Apacible (JohnsonA) 13-May-1996
|
||
|
||
Environment:
|
||
|
||
User Mode -- Win32
|
||
|
||
--*/
|
||
|
||
#include "isatq.hxx"
|
||
|
||
//
|
||
// Forward declarations
|
||
//
|
||
|
||
BOOL
|
||
I_CreateListenSocket(
|
||
IN PATQ_ENDPOINT Endpoint
|
||
);
|
||
|
||
BOOL
|
||
I_CloseListenSocket(
|
||
IN PATQ_ENDPOINT Endpoint
|
||
);
|
||
|
||
BOOL
|
||
StartListenThread(
|
||
IN PATQ_ENDPOINT Endpoint
|
||
);
|
||
|
||
|
||
# define ATQ_MIN_ACCEPTEX_TIMEOUT (120) // 2 minutes = 120 seconds
|
||
|
||
#define ATQ_CLOSE_ENDPOINT_SLEEP_TIME (200) // 200ms = 1/5 second
|
||
#define ATQ_CLOSE_ENDPOINT_TIMEOUT ((100*1000) / ATQ_CLOSE_ENDPOINT_SLEEP_TIME)
|
||
// 100 seconds
|
||
|
||
|
||
PVOID
|
||
AtqCreateEndpoint(
|
||
IN PATQ_ENDPOINT_CONFIGURATION Configuration,
|
||
IN PVOID EndpointContext
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Creates a server instance.
|
||
|
||
Arguments:
|
||
|
||
Context - Context value returned
|
||
|
||
Return Value:
|
||
|
||
TRUE if successful, FALSE on error (call GetLastError)
|
||
|
||
--*/
|
||
|
||
{
|
||
|
||
DWORD timeout = Configuration->AcceptExTimeout;
|
||
PATQ_ENDPOINT endpoint;
|
||
IF_DEBUG(API_ENTRY) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"AtqCreateEndpoint entered\n"));
|
||
}
|
||
|
||
//
|
||
// Allocate list
|
||
//
|
||
|
||
endpoint = (PATQ_ENDPOINT)LocalAlloc(0,sizeof(ATQ_ENDPOINT));
|
||
if ( endpoint == NULL ) {
|
||
ATQ_PRINTF(( DBG_CONTEXT,"Unable to allocate ATQ Endpoint\n"));
|
||
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
|
||
goto error;
|
||
}
|
||
|
||
//
|
||
// Initialize
|
||
//
|
||
|
||
ZeroMemory(endpoint,sizeof(ATQ_ENDPOINT));
|
||
endpoint->Signature = ATQ_ENDPOINT_SIGNATURE;
|
||
endpoint->m_refCount = 1;
|
||
SET_BLOCK_STATE(endpoint, AtqStateActive);
|
||
|
||
endpoint->EnableBw = FALSE;
|
||
endpoint->ConnectCompletion = Configuration->pfnConnect;
|
||
endpoint->ConnectExCompletion = Configuration->pfnConnectEx;
|
||
endpoint->UseAcceptEx = (g_fUseAcceptEx) && (endpoint->ConnectExCompletion);
|
||
endpoint->IoCompletion = Configuration->pfnIoCompletion;
|
||
endpoint->ListenSocket = INVALID_SOCKET;
|
||
endpoint->pListenAtqContext = NULL;
|
||
endpoint->nAvailDuringTimeOut = 0;
|
||
endpoint->nSocketsAvail = 0;
|
||
endpoint->Context = EndpointContext;
|
||
endpoint->pBacklogMon = NULL;
|
||
|
||
endpoint->InitialRecvSize = Configuration->cbAcceptExRecvBuffer;
|
||
|
||
// we need to maintain at least 5 outstanding accept ex sockets
|
||
// for our auto-tune algo to work.
|
||
endpoint->nAcceptExOutstanding =
|
||
( (Configuration->nAcceptExOutstanding > 4) ?
|
||
Configuration->nAcceptExOutstanding : 5);
|
||
|
||
|
||
//
|
||
// fAddingSockets prevents two threads from adding AcceptEx sockets
|
||
// at the same time. Since the endpoint isn't ready to have sockets
|
||
// added we'll set this to TRUE until the endpoint is fully initialized
|
||
// in ActivateEndpoint.
|
||
//
|
||
endpoint->fAddingSockets = TRUE;
|
||
|
||
//
|
||
// Check and set the timeout to be atleast minimum timeout for AcceptEx
|
||
//
|
||
if ( timeout <= ATQ_MIN_ACCEPTEX_TIMEOUT) {
|
||
timeout = ATQ_MIN_ACCEPTEX_TIMEOUT;
|
||
}
|
||
|
||
endpoint->AcceptExTimeout = CanonTimeout( timeout);
|
||
|
||
endpoint->Port = Configuration->ListenPort;
|
||
endpoint->IpAddress = Configuration->IpAddress;
|
||
|
||
//endpoint->ContextList.Initialize( );
|
||
|
||
#if DBG
|
||
endpoint->RefTraceLog = CreateRefTraceLog( TRACE_LOG_SIZE, 0 );
|
||
#endif
|
||
|
||
#if 0
|
||
ATQ_PRINTF(( DBG_CONTEXT,"port %d nAX %d nAT %d nLB %d\n",
|
||
endpoint->Port, endpoint->nAcceptExOutstanding,
|
||
endpoint->AcceptExTimeout, g_cListenBacklog));
|
||
#endif
|
||
|
||
//
|
||
// Create the socket
|
||
//
|
||
|
||
if (!I_CreateListenSocket(endpoint) ) {
|
||
|
||
goto error;
|
||
}
|
||
|
||
return((PVOID)endpoint);
|
||
|
||
error:
|
||
|
||
if ( endpoint != NULL ) {
|
||
#if DBG
|
||
if( endpoint->RefTraceLog != NULL ) {
|
||
DestroyRefTraceLog( endpoint->RefTraceLog );
|
||
}
|
||
#endif
|
||
LocalFree( endpoint );
|
||
}
|
||
|
||
return(NULL);
|
||
|
||
} // AtqCreateEndpoint
|
||
|
||
|
||
|
||
BOOL
|
||
AtqStartEndpoint(
|
||
IN PVOID Endpoint
|
||
)
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
BOOL fReturn;
|
||
DWORD dwError = NO_ERROR;
|
||
|
||
ATQ_ASSERT(IS_BLOCK_ACTIVE(pEndpoint));
|
||
|
||
IF_DEBUG(API_ENTRY) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"AtqStartEndpoint called. UseAcceptEx[%d]\n",
|
||
pEndpoint->UseAcceptEx));
|
||
}
|
||
|
||
//
|
||
// if AcceptEx is supported, create AcceptEx contexts
|
||
//
|
||
|
||
if ( pEndpoint->UseAcceptEx ) {
|
||
|
||
//
|
||
// Add AcceptEx sockets
|
||
//
|
||
|
||
fReturn = pEndpoint->ActivateEndpoint();
|
||
|
||
if ( !fReturn ) {
|
||
dwError = GetLastError();
|
||
|
||
DBGERROR(( DBG_CONTEXT,"Error %d in %08x::ActivateEndpoint()\n",
|
||
GetLastError(), pEndpoint));
|
||
}
|
||
|
||
} else {
|
||
|
||
//
|
||
// We need to start a listen thread
|
||
//
|
||
|
||
fReturn = StartListenThread( pEndpoint );
|
||
|
||
if ( !fReturn ) {
|
||
dwError = GetLastError();
|
||
|
||
DBGERROR(( DBG_CONTEXT,"Error %d in %08x::StartListenThread()\n",
|
||
GetLastError(), pEndpoint));
|
||
}
|
||
}
|
||
|
||
if (!fReturn) {
|
||
AtqStopEndpoint(pEndpoint);
|
||
}
|
||
|
||
SetLastError(dwError);
|
||
|
||
return (fReturn);
|
||
|
||
} // AtqStartEndpoint
|
||
|
||
|
||
|
||
ULONG_PTR
|
||
AtqEndpointGetInfo(
|
||
IN PVOID Endpoint,
|
||
IN ATQ_ENDPOINT_INFO EndpointInfo
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Gets various bits of information for the ATQ endpoint
|
||
|
||
Arguments:
|
||
|
||
Endpoint - endpoint to get data from
|
||
EndpointInfo - type of info to get
|
||
|
||
Return Value:
|
||
|
||
The old value of the parameter
|
||
|
||
--*/
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
DWORD_PTR dwVal = 0;
|
||
|
||
switch ( EndpointInfo ) {
|
||
|
||
case EndpointInfoListenPort:
|
||
dwVal = pEndpoint->Port;
|
||
break;
|
||
|
||
case EndpointInfoListenSocket:
|
||
dwVal = pEndpoint->ListenSocket;
|
||
break;
|
||
|
||
default:
|
||
ATQ_ASSERT( FALSE );
|
||
}
|
||
|
||
return dwVal;
|
||
} // AtqEndpointGetInfo()
|
||
|
||
|
||
|
||
ULONG_PTR
|
||
AtqEndpointSetInfo(
|
||
IN PVOID Endpoint,
|
||
IN ATQ_ENDPOINT_INFO EndpointInfo,
|
||
IN ULONG_PTR Info
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Gets various bits of information for the ATQ module
|
||
|
||
Arguments:
|
||
|
||
Endpoint - endpoint to set info on
|
||
EndpointInfo - type of info to set
|
||
Info - info to set
|
||
|
||
Return Value:
|
||
|
||
The old value of the parameter
|
||
|
||
--*/
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
ULONG_PTR Val = 0;
|
||
|
||
switch ( EndpointInfo ) {
|
||
|
||
case EndpointInfoAcceptExOutstanding:
|
||
|
||
Val = (ULONG_PTR)pEndpoint->nAcceptExOutstanding;
|
||
|
||
if ( Val < Info ) {
|
||
|
||
//
|
||
// Make up for increased limit
|
||
//
|
||
|
||
if ( (DWORD ) pEndpoint->nSocketsAvail < (DWORD)(Info >> 2) ) {
|
||
(VOID ) I_AtqPrepareAcceptExSockets(
|
||
pEndpoint,
|
||
(DWORD)(Info>>2) - pEndpoint->nSocketsAvail
|
||
);
|
||
}
|
||
pEndpoint->nAcceptExOutstanding = (DWORD)Info;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
ATQ_ASSERT( FALSE );
|
||
}
|
||
|
||
return Val;
|
||
} // AtqEndpointSetInfo()
|
||
|
||
|
||
|
||
|
||
BOOL
|
||
AtqStopEndpoint(
|
||
IN PVOID Endpoint
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Stops the endpoint - marks the Endpoint as to be shutdown and closes
|
||
the listening socket -> forcing new connections to stop for this endpoint
|
||
|
||
Arguments:
|
||
|
||
Endpoint - endpoint to be stopped
|
||
|
||
Return Value:
|
||
|
||
TRUE if successful, FALSE on error (call GetLastError)
|
||
|
||
--*/
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
DWORD nClosed;
|
||
|
||
IF_DEBUG( API_ENTRY) {
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"AtqStopEndpoint( %08x)\n", pEndpoint));
|
||
}
|
||
|
||
//
|
||
// Find the listen socket info
|
||
//
|
||
|
||
AcquireLock( &AtqEndpointLock );
|
||
|
||
if ( !IS_BLOCK_ACTIVE(pEndpoint) ) {
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"Attempt to Stop Endpoint (%08x) more than once",
|
||
pEndpoint
|
||
));
|
||
ReleaseLock( &AtqEndpointLock );
|
||
return(FALSE);
|
||
}
|
||
|
||
//
|
||
// Mark the listen info as no longer accepting connections
|
||
//
|
||
|
||
SET_BLOCK_STATE(pEndpoint, AtqStateClosed);
|
||
|
||
//
|
||
// Remove the entry from the end points list
|
||
//
|
||
|
||
RemoveEntryList(&pEndpoint->ListEntry);
|
||
ReleaseLock( &AtqEndpointLock );
|
||
|
||
//
|
||
// Remove us from the Backlog Monitor
|
||
//
|
||
DBG_ASSERT( g_pAtqBacklogMonitor );
|
||
|
||
if (pEndpoint->pBacklogMon) {
|
||
DBG_REQUIRE( g_pAtqBacklogMonitor->RemoveEntry(pEndpoint->pBacklogMon) );
|
||
delete pEndpoint->pBacklogMon;
|
||
pEndpoint->pBacklogMon = NULL;
|
||
}
|
||
|
||
//
|
||
// Close the listen socket which forces the cleanup for all the
|
||
// pending LISTEN ATQ contexts. We do this early on so that
|
||
// we can prevent any new entrant connections into the processing code.
|
||
//
|
||
|
||
I_CloseListenSocket( pEndpoint );
|
||
|
||
//
|
||
// Forcibly close all the pending LISTEN contexts tied to this endpoint
|
||
//
|
||
|
||
nClosed = pEndpoint->CloseAtqContexts( TRUE);
|
||
|
||
DBGPRINTF(( DBG_CONTEXT,
|
||
"ATQ_ENDPOINT(%08x)::Closed %d pending Listen sockets\n",
|
||
pEndpoint, nClosed));
|
||
|
||
//
|
||
// if this is a non-acceptex socket, wait for the listen thread to die
|
||
//
|
||
|
||
if ( !pEndpoint->UseAcceptEx ) {
|
||
WaitForSingleObject(pEndpoint->hListenThread, 10*1000);
|
||
}
|
||
|
||
return ( TRUE);
|
||
|
||
} // AtqStopEndpoint()
|
||
|
||
|
||
BOOL
|
||
AtqCloseEndpoint(
|
||
IN PVOID Endpoint
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Closes the endpoint - it forcefully fress up all references to the
|
||
endpoint (held by ATQ Contexts) by shutting down the ATQ contexts.
|
||
In the course of this operation if some context does not go away, this
|
||
code will end up looping forever!
|
||
|
||
Note: Should be called *after* AtqStopEndpoint()
|
||
|
||
Arguments:
|
||
|
||
Endpoint - endpoint to be stopped
|
||
|
||
Return Value:
|
||
|
||
TRUE if successful, FALSE on error (call GetLastError)
|
||
|
||
--*/
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
DWORD nClosed;
|
||
DWORD i;
|
||
|
||
ASSERT( pEndpoint->Signature == ATQ_ENDPOINT_SIGNATURE );
|
||
|
||
|
||
IF_DEBUG( API_ENTRY) {
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"AtqCloseEndpoint( %08x)\n", pEndpoint));
|
||
}
|
||
|
||
if ( pEndpoint->State != AtqStateClosed) {
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"Attempt to Close Endpoint (%08x) when it is "
|
||
" not stopped yet!\n'",
|
||
pEndpoint
|
||
));
|
||
|
||
DBG_ASSERT(pEndpoint->State == AtqStateClosed);
|
||
|
||
return(FALSE);
|
||
}
|
||
|
||
//
|
||
// wait for all the contexts for this endpoint to go away
|
||
// or for about two minutes
|
||
//
|
||
|
||
i = 0;
|
||
while (( pEndpoint->m_refCount > 1) && (i < ATQ_CLOSE_ENDPOINT_TIMEOUT)) {
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT, " Endpoint(%08x) has %d refs\n",
|
||
pEndpoint, pEndpoint->m_refCount));
|
||
|
||
//
|
||
// Forcibly close all the contexts tied to this endpoint again!
|
||
// Sometimes for some random reasons ATQ contexts get left out
|
||
// during the first clean we did above. In such case it is important
|
||
// to retry again
|
||
// THIS IS UGLY. But if we did not do this then the Endpoint
|
||
// structure might get freed => ATQ contexts will be hanging on to
|
||
// dead ATQ endpoint
|
||
//
|
||
|
||
nClosed = pEndpoint->CloseAtqContexts();
|
||
|
||
DBGPRINTF(( DBG_CONTEXT, " ATQ_ENDPOINT(%08x)::Closed %d sockets\n",
|
||
pEndpoint, nClosed));
|
||
|
||
//
|
||
// NYI: I need to auto-tune this sleep function
|
||
//
|
||
Sleep( ATQ_CLOSE_ENDPOINT_SLEEP_TIME); // sleep and check again.
|
||
|
||
#if DBG
|
||
//
|
||
// loop forever for checked builds
|
||
//
|
||
#else
|
||
//
|
||
// loop until timeout for retail
|
||
//
|
||
i++;
|
||
#endif
|
||
|
||
// wake up and check again.
|
||
} // while (busy wait)
|
||
|
||
//
|
||
// Undo the reference for being on the listen info list.
|
||
// decr final ref count => the endpoint will be cleaned up & freed
|
||
//
|
||
// If we timed out just leak the endpoints!
|
||
//
|
||
|
||
if ( pEndpoint->m_refCount == 1 ) {
|
||
pEndpoint->Dereference();
|
||
|
||
return TRUE;
|
||
} else {
|
||
return FALSE;
|
||
}
|
||
|
||
} // AtqCloseEndpoint()
|
||
|
||
|
||
|
||
BOOL
|
||
AtqStopAndCloseEndpoint(
|
||
IN PVOID Endpoint,
|
||
IN LPTHREAD_START_ROUTINE lpCompletion,
|
||
IN PVOID lpCompletionContext
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Stops the endpoint and closes it after forcing close of
|
||
associated ATQ contexts.
|
||
|
||
Arguments:
|
||
|
||
Endpoint - endpoint to shutdown.
|
||
lpCompletion - routine to be called when endpoint is completely shutdown.
|
||
lpCompletionContext - Context to be returned with the routine
|
||
|
||
Return Value:
|
||
|
||
TRUE if successful, FALSE on error (call GetLastError)
|
||
|
||
--*/
|
||
{
|
||
PATQ_ENDPOINT pEndpoint = (PATQ_ENDPOINT)Endpoint;
|
||
BOOL fReturn;
|
||
|
||
//
|
||
// Warn all the callers of this to be deprecated API and pray that
|
||
// they will all switch over
|
||
//
|
||
#ifndef _NO_TRACING_
|
||
DBGPRINTF( (DBG_CONTEXT, "\n-----------------------------------------------\n"));
|
||
DBGPRINTF( (DBG_CONTEXT, " AtqStopAndCloseEndpoint() should NOT be called\n"));
|
||
DBGPRINTF( (DBG_CONTEXT, " Call 1) AtqStopEndpoint() and \n"));
|
||
DBGPRINTF( (DBG_CONTEXT, " 2) AtqCloseEndpoint() instead\n"));
|
||
DBGPRINTF( (DBG_CONTEXT, " For Now, this call will simulate 1 & 2\n"));
|
||
DBGPRINTF( (DBG_CONTEXT, "-----------------------------------------------\n"));
|
||
#else
|
||
OutputDebugStringA( "\n-----------------------------------------------\n");
|
||
OutputDebugStringA( " AtqStopAndCloseEndpoint() should NOT be called\n");
|
||
OutputDebugStringA( " Call 1) AtqStopEndpoint() and \n");
|
||
OutputDebugStringA( " 2) AtqCloseEndpoint() instead\n");
|
||
OutputDebugStringA( " For Now, this call will simulate 1 & 2\n");
|
||
OutputDebugStringA( "-----------------------------------------------\n");
|
||
#endif
|
||
|
||
|
||
IF_DEBUG( API_ENTRY) {
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"AtqStopAndCloseEndpoint( %08x)\n", pEndpoint));
|
||
}
|
||
|
||
fReturn = AtqStopEndpoint( Endpoint);
|
||
|
||
if ( fReturn) {
|
||
|
||
//
|
||
// Call any custom shutdown function
|
||
// NYI: Too Bad the Endpoint object is not a base class object
|
||
//
|
||
|
||
if ( lpCompletion != NULL ) {
|
||
pEndpoint->ShutdownCallback = lpCompletion;
|
||
pEndpoint->ShutdownCallbackContext = lpCompletionContext;
|
||
}
|
||
|
||
//
|
||
// Now that the Endpoint is stopped and callback functions are called,
|
||
// Let us call the AtqCloseEndpoint() to cleanup the endpoint itself.
|
||
//
|
||
fReturn = AtqCloseEndpoint( Endpoint);
|
||
}
|
||
|
||
return (fReturn);
|
||
|
||
} // AtqStopAndCloseEndpoint()
|
||
|
||
|
||
|
||
BOOL
|
||
ATQ_ENDPOINT::ActivateEndpoint( VOID)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
|
||
This function creates the initial listening socket & ATQ context for given
|
||
endpoint. It also adds initial set of AcceptEx Sockets to the ATQ listening
|
||
pool (if we are using the AcceptEx())
|
||
|
||
Arguments:
|
||
None
|
||
|
||
Return Value:
|
||
|
||
TRUE on success, FALSE on failure
|
||
|
||
--*/
|
||
{
|
||
PATQ_CONT patqContext = NULL;
|
||
BOOL fReturn;
|
||
DWORD cInitial = this->nAcceptExOutstanding;
|
||
|
||
//
|
||
// Add the listen socket
|
||
//
|
||
DBG_ASSERT( this->pListenAtqContext == NULL);
|
||
|
||
fReturn =
|
||
I_AtqAddListenEndpointToPort(
|
||
(PATQ_CONT*)&this->pListenAtqContext,
|
||
this
|
||
);
|
||
|
||
if ( !fReturn) {
|
||
|
||
if ( this->pListenAtqContext ) {
|
||
AtqFreeContext( this->pListenAtqContext, FALSE);
|
||
this->pListenAtqContext = NULL;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
cInitial = max(cInitial, 1);
|
||
|
||
if ( !TsIsNtServer( ) ) {
|
||
|
||
//
|
||
// Limit what a workstation can specify
|
||
//
|
||
|
||
cInitial = min(cInitial, ATQ_MIN_CTX_INC);
|
||
this->nAcceptExOutstanding = cInitial;
|
||
|
||
}
|
||
|
||
//
|
||
// start with 1/4 of the intended
|
||
//
|
||
|
||
cInitial = max( cInitial >> 2, 1);
|
||
|
||
//
|
||
// Now we're finally ready to add AcceptEx sockets, so we'll
|
||
// reset the flag that was preventing it.
|
||
//
|
||
fAddingSockets = FALSE;
|
||
|
||
//
|
||
// Now add the acceptex sockets for this ListenInfo object
|
||
//
|
||
|
||
fReturn = I_AtqPrepareAcceptExSockets(this, cInitial);
|
||
|
||
if (fReturn && !g_fDisableBacklogMonitor ) {
|
||
//
|
||
// Set up the Backlog monitor
|
||
//
|
||
DBG_ASSERT( pBacklogMon == NULL );
|
||
DBG_ASSERT( g_pAtqBacklogMonitor );
|
||
|
||
pBacklogMon = new ATQ_ENDPOINT_BMON(ListenSocket, this);
|
||
|
||
if (pBacklogMon) {
|
||
|
||
fReturn = (pBacklogMon->InitEvent()
|
||
&& g_pAtqBacklogMonitor->AddEntry(pBacklogMon));
|
||
|
||
if (!fReturn) {
|
||
delete pBacklogMon;
|
||
pBacklogMon = NULL;
|
||
}
|
||
} else {
|
||
fReturn = FALSE;
|
||
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
||
}
|
||
}
|
||
|
||
return(fReturn);
|
||
|
||
} // ATQ_ENDPOINT::ActivateEndpoint()
|
||
|
||
|
||
|
||
DWORD
|
||
ATQ_ENDPOINT::CloseAtqContexts( IN BOOL fPendingOnly)
|
||
/*++
|
||
Description:
|
||
This function searches for all ATQ contexts associated
|
||
with the given endpoint and forcibly closes them all.
|
||
|
||
Arguments:
|
||
fPendingOnly - close only the pending sockets
|
||
|
||
Returns:
|
||
DWORD containing the number of ATQ contexts closed.
|
||
--*/
|
||
{
|
||
DWORD nClosed = 0;
|
||
DWORD i;
|
||
PLIST_ENTRY pEntry;
|
||
PATQ_CONT pContext;
|
||
|
||
//
|
||
// Force a close on all the connected sockets so that all the holders
|
||
// and use of such contexts will bail out of this endpoint entirely.
|
||
// NYI: We need a way to tag on all these lists on per-endpoint basis
|
||
//
|
||
|
||
for ( i = 0; i < g_dwNumContextLists; i++) {
|
||
|
||
PLIST_ENTRY pListHead;
|
||
|
||
AtqActiveContextList[i].Lock();
|
||
|
||
//
|
||
// Hard close sockets in the pending list
|
||
//
|
||
|
||
pListHead = &AtqActiveContextList[i].PendingAcceptExListHead;
|
||
for ( pEntry = pListHead->Flink;
|
||
pEntry != pListHead;
|
||
pEntry = pEntry->Flink ) {
|
||
|
||
pContext = CONTAINING_RECORD( pEntry, ATQ_CONTEXT, m_leTimeout );
|
||
|
||
ATQ_ASSERT( pContext->Signature == ATQ_CONTEXT_SIGNATURE );
|
||
|
||
if ( (pContext->pEndpoint == this) &&
|
||
(pContext->IsState( ACS_SOCK_CONNECTED) ||
|
||
pContext->IsState( ACS_SOCK_LISTENING)
|
||
) &&
|
||
(pContext->hAsyncIO != NULL) ) {
|
||
|
||
nClosed++;
|
||
pContext->HardCloseSocket();
|
||
}
|
||
} // for items in pending list
|
||
|
||
if ( !fPendingOnly) {
|
||
//
|
||
// Hard close sockets in the active list
|
||
// Active list includes sockets in ACS_SOCK_CLOSED state
|
||
// that ought to be freed up, because we could have reached
|
||
// this through the optimizations for TransmitFile()
|
||
//
|
||
|
||
pListHead = &AtqActiveContextList[i].ActiveListHead;
|
||
for ( pEntry = pListHead->Flink;
|
||
pEntry != pListHead;
|
||
pEntry = pEntry->Flink ) {
|
||
|
||
pContext = CONTAINING_RECORD( pEntry, ATQ_CONTEXT,
|
||
m_leTimeout );
|
||
|
||
ATQ_ASSERT( pContext->Signature == ATQ_CONTEXT_SIGNATURE );
|
||
|
||
if ( (pContext->pEndpoint == this) &&
|
||
(pContext->IsState( ACS_SOCK_CONNECTED) ||
|
||
pContext->IsState( ACS_SOCK_LISTENING) ||
|
||
pContext->IsState( ACS_SOCK_CLOSED) ||
|
||
pContext->IsState( ACS_SOCK_UNCONNECTED)
|
||
) &&
|
||
(pContext->hAsyncIO != NULL) ) {
|
||
|
||
nClosed++;
|
||
pContext->HardCloseSocket();
|
||
}
|
||
} // for items in active list
|
||
} // if (! fPendingOnly)
|
||
|
||
AtqActiveContextList[i].Unlock();
|
||
|
||
} // for
|
||
|
||
return ( nClosed);
|
||
|
||
} // ATQ_ENDPOINT::CloseAtqContexts()
|
||
|
||
|
||
/************************************************************
|
||
* Internal Functions
|
||
************************************************************/
|
||
|
||
|
||
BOOL
|
||
I_CreateListenSocket(
|
||
IN PATQ_ENDPOINT pEndpoint
|
||
)
|
||
/*++
|
||
|
||
Creates a socket for listening to connections on given address.
|
||
|
||
Arguments:
|
||
|
||
lpSockAddress pointer to local socket address structure used to bind
|
||
the given connection.
|
||
lenSockAddress length of the socket address structure.
|
||
socketType integer containing the type of the socket ( stream )
|
||
socketProtocol protocol to be used for the socket.
|
||
nBackLog Maximum length to which a queue of pending connections
|
||
may grow.
|
||
|
||
Returns:
|
||
NO_ERROR on success; otherwise returns Sockets error code.
|
||
|
||
--*/
|
||
{
|
||
INT serr;
|
||
SOCKET sNew;
|
||
BOOL fReuseAddr = FALSE;
|
||
SOCKADDR_IN inAddr;
|
||
PSOCKADDR addr;
|
||
INT addrLength;
|
||
PLIST_ENTRY listEntry;
|
||
PATQ_ENDPOINT scanEndpoint;
|
||
|
||
IF_DEBUG(API_ENTRY) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"I_CreateListenEndpoint called. \n"));
|
||
}
|
||
|
||
//
|
||
// Since we'll be altering our behaviour based on the contents of
|
||
// the endpoint list, we must acquire the endpoint list lock and
|
||
// hold this lock throughout this routine.
|
||
//
|
||
|
||
AcquireLock( &AtqEndpointLock);
|
||
|
||
//
|
||
// If this is the first endpoint to be bound to this port, then
|
||
// disable SO_REUSEADDR. Otherwise (there are other endpoints already
|
||
// using this port), then enable SO_REUSEADDR.
|
||
//
|
||
// "Why are we doing this" you ask? Since we're binding our listening
|
||
// sockets to specific IP addresses, we must enable SO_REUSEADDR
|
||
// (otherwise, we'd get WSAEADDRINUSE errors). However, in an effort
|
||
// to detect a port conflicts with other (non-IIS) software, we'll
|
||
// disable SO_REUSEADDR the *first* time a particular port is used.
|
||
//
|
||
|
||
for( listEntry = AtqEndpointList.Flink;
|
||
listEntry != &AtqEndpointList;
|
||
listEntry = listEntry->Flink ) {
|
||
|
||
scanEndpoint = CONTAINING_RECORD(
|
||
listEntry,
|
||
ATQ_ENDPOINT,
|
||
ListEntry
|
||
);
|
||
|
||
ATQ_ASSERT( scanEndpoint->Signature == ATQ_ENDPOINT_SIGNATURE );
|
||
|
||
if( scanEndpoint->Port == pEndpoint->Port ) {
|
||
fReuseAddr = TRUE;
|
||
break;
|
||
}
|
||
|
||
}
|
||
|
||
//
|
||
// Create a new socket
|
||
//
|
||
|
||
#if WINSOCK11
|
||
sNew = socket(
|
||
AF_INET,
|
||
SOCK_STREAM,
|
||
IPPROTO_TCP
|
||
);
|
||
#else
|
||
sNew = WSASocket(
|
||
AF_INET,
|
||
SOCK_STREAM,
|
||
IPPROTO_TCP,
|
||
NULL, // protocol info
|
||
0, // Group ID = 0 => no constraints
|
||
WSA_FLAG_OVERLAPPED // completion port notifications
|
||
);
|
||
# endif // WINSOCK11
|
||
|
||
if ( sNew == INVALID_SOCKET ) {
|
||
serr = WSAGetLastError();
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"Error %d in socket( %d, %d, %d)\n",
|
||
serr,
|
||
AF_INET,
|
||
SOCK_STREAM,
|
||
IPPROTO_TCP
|
||
));
|
||
|
||
goto cleanup;
|
||
}
|
||
|
||
//
|
||
// Set SO_REUSEADDR based on results of the endpoint scan above.
|
||
//
|
||
|
||
if ( setsockopt( sNew, SOL_SOCKET, SO_REUSEADDR,
|
||
(const CHAR *) &fReuseAddr,
|
||
sizeof( fReuseAddr)) != 0) {
|
||
|
||
serr = WSAGetLastError();
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
" setsockopt( %d, REUSE_ADDR, FALSE) failed."
|
||
" Error = %d\n",
|
||
sNew, serr));
|
||
|
||
goto cleanup;
|
||
}
|
||
|
||
//
|
||
// See which address family we're dealing with
|
||
//
|
||
|
||
addr = (PSOCKADDR)&inAddr;
|
||
addrLength = sizeof(inAddr);
|
||
ZeroMemory(addr, addrLength);
|
||
|
||
inAddr.sin_family = AF_INET;
|
||
inAddr.sin_port = htons(pEndpoint->Port);
|
||
inAddr.sin_addr.s_addr = pEndpoint->IpAddress;
|
||
|
||
//
|
||
// Bind an address to socket
|
||
//
|
||
|
||
if ( bind( sNew, addr, addrLength) != 0) {
|
||
|
||
serr = WSAGetLastError();
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"bind ( socket = %d, Address = %08x, len = %d) "
|
||
" returns error = %u\n",
|
||
sNew, addr, addrLength, serr));
|
||
|
||
goto cleanup;
|
||
}
|
||
|
||
//
|
||
// Put the socket in listen mode
|
||
//
|
||
|
||
if ( listen( sNew, g_cListenBacklog) != 0) {
|
||
|
||
serr = WSAGetLastError();
|
||
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
" listen( %d, %d) returned %d.\n",
|
||
sNew, g_cListenBacklog, serr));
|
||
goto cleanup;
|
||
}
|
||
|
||
pEndpoint->ListenSocket = sNew;
|
||
|
||
//
|
||
// Link to server listen list
|
||
//
|
||
|
||
InsertTailList(
|
||
&AtqEndpointList,
|
||
&pEndpoint->ListEntry
|
||
);
|
||
|
||
ReleaseLock( &AtqEndpointLock);
|
||
return(TRUE);
|
||
|
||
cleanup:
|
||
|
||
if ( sNew != INVALID_SOCKET) {
|
||
closesocket( sNew);
|
||
}
|
||
|
||
ReleaseLock( &AtqEndpointLock);
|
||
SetLastError(serr);
|
||
return(FALSE);
|
||
|
||
} // I_CreateListenSocket
|
||
|
||
|
||
|
||
|
||
BOOL
|
||
I_CloseListenSocket(
|
||
IN PATQ_ENDPOINT Endpoint
|
||
)
|
||
/*++
|
||
|
||
Closes the socket on which a listen was possibly established.
|
||
|
||
Returns:
|
||
TRUE, if successful,
|
||
FALSE, otherwise
|
||
|
||
--*/
|
||
{
|
||
INT serr = NO_ERROR;
|
||
LINGER linger;
|
||
SOCKET s;
|
||
|
||
IF_DEBUG(API_ENTRY) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"I_CloseListenSocket called.\n"));
|
||
}
|
||
|
||
s = (SOCKET)InterlockedExchangePointer(
|
||
(PVOID *)&Endpoint->ListenSocket,
|
||
(PVOID)INVALID_SOCKET
|
||
);
|
||
|
||
if ( s == INVALID_SOCKET) {
|
||
return(TRUE);
|
||
}
|
||
|
||
//
|
||
// Enable linger with timeout of ZERO for "hard" close
|
||
//
|
||
// Error code from sock option is ignored, since we are
|
||
// anyway closing the socket
|
||
//
|
||
|
||
linger.l_onoff = TRUE;
|
||
linger.l_linger = 0;
|
||
setsockopt( s, SOL_SOCKET, SO_LINGER, (PCHAR)&linger,sizeof(linger));
|
||
|
||
//
|
||
// Close the socket
|
||
//
|
||
|
||
if (closesocket(s) != 0) {
|
||
serr = WSAGetLastError();
|
||
ATQ_PRINTF(( DBG_CONTEXT,"error %d in closesocket\n",serr));
|
||
} else {
|
||
|
||
// Remove the socket from the ListenAtq Context as well
|
||
// since the socket is now closed here in this function.
|
||
PATQ_CONTEXT patqc = Endpoint->pListenAtqContext;
|
||
if ( patqc != NULL) {
|
||
patqc->hAsyncIO = NULL;
|
||
}
|
||
}
|
||
|
||
return (TRUE);
|
||
} // I_CloseListenSocket()
|
||
|
||
|
||
|
||
|
||
DWORD
|
||
ListenThreadFunc(
|
||
LPVOID Context
|
||
)
|
||
/*++
|
||
|
||
Main loop waiting for connections. ( The core of server)
|
||
The thread loops around waiting on an accept() call on
|
||
listenSocket.
|
||
If there is a new message on socket, it invokes the
|
||
callback function for connection.
|
||
|
||
NEVER returns untill it is requested to stop by someother
|
||
thread using a call to TS_CONNECTION_INFO::StopConnectionThread().
|
||
|
||
Returns:
|
||
|
||
0 on success and error code if there is a fatal error.
|
||
|
||
|
||
--*/
|
||
{
|
||
|
||
INT serr;
|
||
register SOCKET sNewConnection;
|
||
SOCKADDR_IN sockAddrRemote;
|
||
PATQ_ENDPOINT endpoint = (PATQ_ENDPOINT)Context;
|
||
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"ListenThreadFunc() running.\n"));
|
||
}
|
||
|
||
//
|
||
// Loop Forever
|
||
//
|
||
|
||
for( ; ;) {
|
||
|
||
int cbAddr = sizeof( sockAddrRemote);
|
||
|
||
//
|
||
// Wait for a connection
|
||
//
|
||
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"Listening for new connection\n"));
|
||
}
|
||
|
||
if ((sNewConnection = WSAAccept(
|
||
endpoint->ListenSocket,
|
||
(LPSOCKADDR ) &sockAddrRemote,
|
||
&cbAddr,
|
||
NULL,
|
||
0)) != INVALID_SOCKET) {
|
||
|
||
//
|
||
// Valid Connection has been established.
|
||
// Invoke the callback function to process this connection
|
||
// and then continue the loop
|
||
//
|
||
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"Got new connection. sock[%d]\n",
|
||
sNewConnection));
|
||
}
|
||
|
||
(*endpoint->ConnectCompletion)(
|
||
sNewConnection,
|
||
&sockAddrRemote,
|
||
endpoint->Context,
|
||
(PVOID)endpoint
|
||
);
|
||
|
||
} else {
|
||
|
||
//
|
||
// Some low level error has occured.
|
||
//
|
||
|
||
serr = WSAGetLastError();
|
||
ATQ_PRINTF((DBG_CONTEXT,"Error %d in accept\n", serr));
|
||
|
||
if ( serr == WSAEINTR) {
|
||
|
||
//
|
||
// Socket was closed by low-level call. Get out.
|
||
//
|
||
|
||
break;
|
||
}
|
||
|
||
//
|
||
// Check if we are shutting down and if so QUIT
|
||
//
|
||
|
||
if (!IS_BLOCK_ACTIVE(endpoint)) {
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"ListenThread shutting down\n"));
|
||
}
|
||
break;
|
||
}
|
||
|
||
//
|
||
// Perform a graceful recovery from failure. NYI
|
||
// ( Tricky code). Both FTP and Web server are to test it!
|
||
// Will add this code later. ( MuraliK)
|
||
//
|
||
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"Unexpected error %d on accept\n",
|
||
serr));
|
||
}
|
||
}
|
||
}
|
||
|
||
//
|
||
// Cleanup & Exit. Cleanup is done by the code which called the shut down.
|
||
//
|
||
|
||
IF_DEBUG(ENDPOINT) {
|
||
ATQ_PRINTF((DBG_CONTEXT,"ListenThread exiting.\n"));
|
||
}
|
||
return ( 0); // No errors
|
||
|
||
} // ListenThreadFunc()
|
||
|
||
|
||
|
||
BOOL
|
||
StartListenThread(
|
||
IN PATQ_ENDPOINT Endpoint
|
||
)
|
||
{
|
||
DWORD id;
|
||
|
||
Endpoint->hListenThread = CreateThread(
|
||
NULL,
|
||
0,
|
||
ListenThreadFunc,
|
||
(PVOID )Endpoint,
|
||
0,
|
||
&id
|
||
);
|
||
|
||
if ( Endpoint->hListenThread != NULL) {
|
||
return(TRUE);
|
||
}
|
||
|
||
return(FALSE);
|
||
|
||
} // StartListenThread
|
||
|
||
|
||
|
||
VOID
|
||
ATQ_ENDPOINT::CleanupEndpoint(
|
||
VOID
|
||
)
|
||
/*++
|
||
|
||
Description:
|
||
This function cleansup the internal state of the object and prepares
|
||
it for the deletion.
|
||
All endpoints should pass through this function when the ref count
|
||
this zero.
|
||
|
||
--*/
|
||
{
|
||
DBG_ASSERT( this->m_refCount == 0);
|
||
ATQ_ASSERT( !IS_BLOCK_ACTIVE( this) );
|
||
ASSERT( this->Signature == ATQ_ENDPOINT_SIGNATURE );
|
||
|
||
// the following free will throw away the listen atq context
|
||
if ( this->pListenAtqContext != NULL) {
|
||
ATQ_PRINTF(( DBG_CONTEXT,
|
||
"Endpoint(%08x) frees listen context %08x\n",
|
||
this, this->pListenAtqContext));
|
||
AtqFreeContext( this->pListenAtqContext, FALSE);
|
||
this->pListenAtqContext = NULL;
|
||
}
|
||
|
||
if ( this->ShutdownCallback != NULL ) {
|
||
//
|
||
// This only happens when someone calls AtqStopAndCloseEndpoint which should
|
||
// never happen in K2.
|
||
//
|
||
ASSERT( FALSE );
|
||
this->ShutdownCallback( this->ShutdownCallbackContext);
|
||
}
|
||
|
||
this->Signature = ATQ_ENDPOINT_SIGNATURE_FREE;
|
||
|
||
#if DBG
|
||
if( this->RefTraceLog != NULL ) {
|
||
DestroyRefTraceLog( this->RefTraceLog );
|
||
}
|
||
#endif
|
||
|
||
return;
|
||
|
||
} // ATQ_ENDPOINT::CleanupEndpoint()
|
||
|
||
|
||
VOID
|
||
ATQ_ENDPOINT_BMON::ForceCompletion(
|
||
IN PVOID pvContext
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Scheduled timeout of all unconnected sockets
|
||
|
||
Arguments:
|
||
|
||
pvContext - Context (ATQ_ENDPOINT_BMON *)
|
||
|
||
Return Values:
|
||
|
||
None
|
||
|
||
--*/
|
||
{
|
||
ATQ_ENDPOINT_BMON* pEndpointBMon;
|
||
PATQ_CONTEXT_LISTHEAD pACL;
|
||
DWORD cForcedTotal = 0;
|
||
DWORD cForced = 0;
|
||
|
||
if ( !pvContext )
|
||
{
|
||
DBG_ASSERT( FALSE );
|
||
return;
|
||
}
|
||
|
||
pEndpointBMon = (ATQ_ENDPOINT_BMON*) pvContext;
|
||
|
||
for ( pACL = AtqActiveContextList;
|
||
pACL < (AtqActiveContextList + g_dwNumContextLists);
|
||
pACL++ )
|
||
{
|
||
I_AtqProcessPendingListens( pACL,
|
||
pEndpointBMon->m_pEndpoint,
|
||
&cForced );
|
||
|
||
cForcedTotal += cForced;
|
||
}
|
||
|
||
//
|
||
// Add back any sockets we forced
|
||
//
|
||
|
||
if ( cForcedTotal )
|
||
{
|
||
I_AtqPrepareAcceptExSockets( pEndpointBMon->m_pEndpoint,
|
||
cForcedTotal );
|
||
}
|
||
|
||
//
|
||
// Update stats
|
||
//
|
||
|
||
pEndpointBMon->m_nSocketsReset += cForcedTotal;
|
||
|
||
pEndpointBMon->m_dwForceCookie = 0;
|
||
}
|
||
|
||
BOOL
|
||
ATQ_ENDPOINT_BMON::Callback(
|
||
VOID
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
The ATQ_BACKLOG_MONITOR calls this function
|
||
when our listen socket runs out of AccepEx
|
||
sockets.
|
||
|
||
Arguments:
|
||
|
||
None
|
||
|
||
Return Values:
|
||
|
||
Return TRUE if successful, else FALSE
|
||
--*/
|
||
{
|
||
PLIST_ENTRY pListEntry;
|
||
|
||
// How many times were we called?
|
||
|
||
m_nActivations++;
|
||
|
||
//
|
||
// Inform the set thread to sleep after all notifications
|
||
//
|
||
|
||
GetContainingBmonSet()->DoSleep( TRUE );
|
||
|
||
//
|
||
// Are there available threads? If not, then this condition won't be
|
||
// helped by creating more sockets. Do nothing.
|
||
//
|
||
|
||
if ( g_cAvailableThreads )
|
||
{
|
||
DBG_ASSERT( m_pEndpoint );
|
||
|
||
if ( !g_cForceTimeout )
|
||
{
|
||
//
|
||
// No wait period before force. Just do it.
|
||
//
|
||
|
||
ForceCompletion( this );
|
||
}
|
||
else if ( !m_dwForceCookie )
|
||
{
|
||
//
|
||
// OK. Let's do something. Traverse the list of unconnected
|
||
// sockets and set an <x> second timeout on each
|
||
//
|
||
|
||
m_dwForceCookie = ScheduleWorkItem(
|
||
ATQ_ENDPOINT_BMON::ForceCompletion,
|
||
this,
|
||
TimeToWait( g_cForceTimeout ),
|
||
FALSE );
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
ATQ_ENDPOINT_BMON::~ATQ_ENDPOINT_BMON(
|
||
VOID
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
ATQ_ENDPOINT_BMON destructor. Kill the scheduled work item if there
|
||
|
||
Arguments:
|
||
|
||
None
|
||
|
||
Return Values:
|
||
|
||
None
|
||
|
||
--*/
|
||
{
|
||
if ( m_dwForceCookie )
|
||
{
|
||
RemoveWorkItem( m_dwForceCookie );
|
||
m_dwForceCookie = 0;
|
||
}
|
||
}
|