2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: drivers/net/afd/afd/read.c
5 * PURPOSE: Ancillary functions driver
6 * PROGRAMMER: Art Yerkes (ayerkes@speakeasy.net)
10 * Improve buffering code
12 * We're keeping data receiving in one of two states:
13 * A) Some data available in the FCB
14 * FCB->Recv.BytesUsed != FCB->Recv.Content
15 * FCB->ReceiveIrp.InFlightRequest == NULL
16 * AFD_EVENT_RECEIVE set in FCB->PollState
17 * B) No data available in the FCB
18 * FCB->Recv.BytesUsed == FCB->Recv.Content (== 0)
19 * FCB->RecieveIrp.InFlightRequest != NULL
20 * AFD_EVENT_RECEIVED not set in FCB->PollState
21 * So basically we either have data available or a TDI receive
25 #include "tdi_proto.h"
29 static BOOLEAN
CantReadMore( PAFD_FCB FCB
) {
30 UINT BytesAvailable
= FCB
->Recv
.Content
- FCB
->Recv
.BytesUsed
;
32 return !BytesAvailable
&&
33 (FCB
->PollState
& (AFD_EVENT_CLOSE
| AFD_EVENT_DISCONNECT
));
36 static VOID
HandleEOFOnIrp( PAFD_FCB FCB
, NTSTATUS Status
, UINT Information
) {
37 if( Status
== STATUS_SUCCESS
&& Information
== 0 ) {
38 AFD_DbgPrint(MID_TRACE
,("Looks like an EOF\n"));
39 FCB
->PollState
|= AFD_EVENT_DISCONNECT
;
40 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
44 static NTSTATUS
TryToSatisfyRecvRequestFromBuffer( PAFD_FCB FCB
,
45 PAFD_RECV_INFO RecvReq
,
46 PUINT TotalBytesCopied
) {
47 UINT i
, BytesToCopy
= 0,
49 FCB
->Recv
.Content
- FCB
->Recv
.BytesUsed
;
52 *TotalBytesCopied
= 0;
55 AFD_DbgPrint(MID_TRACE
,("Called, BytesAvailable = %d\n",
58 if( CantReadMore(FCB
) ) return STATUS_SUCCESS
;
59 if( !BytesAvailable
) return STATUS_PENDING
;
61 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+ RecvReq
->BufferCount
);
63 AFD_DbgPrint(MID_TRACE
,("Buffer Count: %d @ %x\n",
65 RecvReq
->BufferArray
));
67 RecvReq
->BufferArray
&&
69 i
< RecvReq
->BufferCount
;
72 MIN( RecvReq
->BufferArray
[i
].len
, BytesAvailable
);
75 Map
[i
].BufferAddress
= MmMapLockedPages( Map
[i
].Mdl
, KernelMode
);
77 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
82 RtlCopyMemory( Map
[i
].BufferAddress
,
83 FCB
->Recv
.Window
+ FCB
->Recv
.BytesUsed
,
86 MmUnmapLockedPages( Map
[i
].BufferAddress
, Map
[i
].Mdl
);
88 *TotalBytesCopied
+= BytesToCopy
;
90 if (!(RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
)) {
91 FCB
->Recv
.BytesUsed
+= BytesToCopy
;
92 BytesAvailable
-= BytesToCopy
;
97 /* If there's nothing left in our buffer start a new request */
98 if( FCB
->Recv
.BytesUsed
== FCB
->Recv
.Content
) {
99 FCB
->Recv
.BytesUsed
= FCB
->Recv
.Content
= 0;
100 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
102 if( !FCB
->ReceiveIrp
.InFlightRequest
) {
103 AFD_DbgPrint(MID_TRACE
,("Replenishing buffer\n"));
105 SocketCalloutEnter( FCB
);
107 Status
= TdiReceive( &FCB
->ReceiveIrp
.InFlightRequest
,
108 FCB
->Connection
.Object
,
112 &FCB
->ReceiveIrp
.Iosb
,
116 SocketCalloutLeave( FCB
);
118 if( Status
== STATUS_SUCCESS
)
119 FCB
->Recv
.Content
= FCB
->ReceiveIrp
.Iosb
.Information
;
120 HandleEOFOnIrp( FCB
, Status
, FCB
->ReceiveIrp
.Iosb
.Information
);
124 return STATUS_SUCCESS
;
127 static NTSTATUS
ReceiveActivity( PAFD_FCB FCB
, PIRP Irp
) {
128 PLIST_ENTRY NextIrpEntry
;
130 PIO_STACK_LOCATION NextIrpSp
;
131 PAFD_RECV_INFO RecvReq
;
132 UINT TotalBytesCopied
= 0, RetBytesCopied
= 0;
133 NTSTATUS Status
= STATUS_SUCCESS
, RetStatus
= STATUS_PENDING
;
135 AFD_DbgPrint(MID_TRACE
,("%x %x\n", FCB
, Irp
));
137 if( CantReadMore( FCB
) ) {
138 /* Success here means that we got an EOF. Complete a pending read
139 * with zero bytes if we haven't yet overread, then kill the others.
141 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
143 RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
145 CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
146 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
147 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
149 AFD_DbgPrint(MID_TRACE
,("Completing recv %x (%d)\n", NextIrp
,
151 UnlockBuffers( RecvReq
->BufferArray
,
152 RecvReq
->BufferCount
, FALSE
);
153 Status
= NextIrp
->IoStatus
.Status
=
154 FCB
->Overread
? STATUS_END_OF_FILE
: STATUS_SUCCESS
;
155 NextIrp
->IoStatus
.Information
= 0;
156 if( NextIrp
== Irp
) RetStatus
= Status
;
157 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
158 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
159 FCB
->Overread
= TRUE
;
160 //FCB->PollState |= AFD_EVENT_DISCONNECT;
161 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
164 /* Kick the user that receive would be possible now */
165 /* XXX Not implemented yet */
167 AFD_DbgPrint(MID_TRACE
,("FCB %x Receive data waiting %d\n",
168 FCB
, FCB
->Recv
.Content
));
169 /*OskitDumpBuffer( FCB->Recv.Window, FCB->Recv.Content );*/
171 /* Try to clear some requests */
172 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
174 RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
176 CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
177 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
178 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
180 AFD_DbgPrint(MID_TRACE
,("RecvReq @ %x\n", RecvReq
));
182 Status
= TryToSatisfyRecvRequestFromBuffer
183 ( FCB
, RecvReq
, &TotalBytesCopied
);
185 if( Status
== STATUS_PENDING
) {
186 AFD_DbgPrint(MID_TRACE
,("Ran out of data for %x\n", NextIrp
));
187 InsertHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
],
188 &NextIrp
->Tail
.Overlay
.ListEntry
);
191 AFD_DbgPrint(MID_TRACE
,("Completing recv %x (%d)\n", NextIrp
,
193 UnlockBuffers( RecvReq
->BufferArray
,
194 RecvReq
->BufferCount
, FALSE
);
195 NextIrp
->IoStatus
.Status
= Status
;
196 NextIrp
->IoStatus
.Information
= TotalBytesCopied
;
197 if( NextIrp
== Irp
) {
199 RetBytesCopied
= TotalBytesCopied
;
201 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
202 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
207 if( FCB
->Recv
.Content
) {
208 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
210 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
212 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
214 AFD_DbgPrint(MID_TRACE
,("RetStatus for irp %x is %x\n", Irp
, RetStatus
));
216 /* Sometimes we're called with a NULL Irp */
218 Irp
->IoStatus
.Status
= RetStatus
;
219 Irp
->IoStatus
.Information
= RetBytesCopied
;
225 NTSTATUS NTAPI ReceiveComplete
226 ( PDEVICE_OBJECT DeviceObject
,
229 NTSTATUS Status
= Irp
->IoStatus
.Status
;
230 PAFD_FCB FCB
= (PAFD_FCB
)Context
;
232 AFD_DbgPrint(MID_TRACE
,("Called\n"));
234 ASSERT_IRQL(APC_LEVEL
);
236 if( !SocketAcquireStateLock( FCB
) ) return Status
;
238 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
239 FCB
->Recv
.Content
= Irp
->IoStatus
.Information
;
240 FCB
->Recv
.BytesUsed
= 0;
242 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
243 AFD_DbgPrint(MIN_TRACE
,("!!! CLOSED SOCK GOT A RECEIVE COMPLETE !!!\n"));
244 SocketStateUnlock( FCB
);
245 DestroySocket( FCB
);
246 return STATUS_SUCCESS
;
247 } else if( FCB
->State
== SOCKET_STATE_LISTENING
) {
248 AFD_DbgPrint(MIN_TRACE
,("!!! LISTENER GOT A RECEIVE COMPLETE !!!\n"));
249 SocketStateUnlock( FCB
);
250 return STATUS_UNSUCCESSFUL
;
253 HandleEOFOnIrp( FCB
, Irp
->IoStatus
.Status
, Irp
->IoStatus
.Information
);
255 ReceiveActivity( FCB
, NULL
);
257 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
259 SocketStateUnlock( FCB
);
261 AFD_DbgPrint(MID_TRACE
,("Returned %x\n", Status
));
263 return STATUS_SUCCESS
;
267 AfdConnectedSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
268 PIO_STACK_LOCATION IrpSp
, BOOLEAN Short
) {
269 NTSTATUS Status
= STATUS_INVALID_PARAMETER
;
270 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
271 PAFD_FCB FCB
= FileObject
->FsContext
;
272 PAFD_RECV_INFO RecvReq
;
273 UINT TotalBytesCopied
= 0;
275 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
277 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
279 if( FCB
->State
!= SOCKET_STATE_CONNECTED
&&
280 FCB
->State
!= SOCKET_STATE_CONNECTING
) {
281 AFD_DbgPrint(MID_TRACE
,("Called recv on wrong kind of socket (s%x)\n",
283 return UnlockAndMaybeComplete( FCB
, STATUS_UNSUCCESSFUL
,
287 if( FCB
->Flags
& AFD_ENDPOINT_CONNECTIONLESS
)
289 AFD_DbgPrint(MID_TRACE
,("Receive on connection-less sockets not implemented\n"));
290 return UnlockAndMaybeComplete( FCB
, STATUS_NOT_IMPLEMENTED
,
294 FCB
->EventsFired
&= ~AFD_EVENT_RECEIVE
;
295 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
297 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
298 return UnlockAndMaybeComplete( FCB
, STATUS_NO_MEMORY
,
301 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
303 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
304 RecvReq
->BufferCount
,
308 if( !RecvReq
->BufferArray
) {
309 return UnlockAndMaybeComplete( FCB
, STATUS_ACCESS_VIOLATION
,
313 Irp
->IoStatus
.Status
= STATUS_PENDING
;
314 Irp
->IoStatus
.Information
= 0;
316 InsertTailList( &FCB
->PendingIrpList
[FUNCTION_RECV
],
317 &Irp
->Tail
.Overlay
.ListEntry
);
319 /************ From this point, the IRP is not ours ************/
321 Status
= ReceiveActivity( FCB
, Irp
);
323 if( Status
== STATUS_PENDING
&& RecvReq
->AfdFlags
& AFD_IMMEDIATE
) {
324 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
325 Status
= STATUS_CANT_WAIT
;
326 TotalBytesCopied
= 0;
327 RemoveEntryList( &Irp
->Tail
.Overlay
.ListEntry
);
328 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
329 return UnlockAndMaybeComplete( FCB
, Status
, Irp
,
330 TotalBytesCopied
, NULL
);
331 } else if( Status
== STATUS_PENDING
) {
332 AFD_DbgPrint(MID_TRACE
,("Leaving read irp\n"));
333 IoMarkIrpPending( Irp
);
335 AFD_DbgPrint(MID_TRACE
,("Completed with status %x\n", Status
));
338 SocketStateUnlock( FCB
);
343 static NTSTATUS STDCALL
344 SatisfyPacketRecvRequest( PAFD_FCB FCB
, PIRP Irp
,
345 PAFD_STORED_DATAGRAM DatagramRecv
,
346 PUINT TotalBytesCopied
) {
347 NTSTATUS Status
= STATUS_SUCCESS
;
348 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
349 PAFD_RECV_INFO RecvReq
=
350 IrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
351 UINT BytesToCopy
= 0, BytesAvailable
= DatagramRecv
->Len
, AddrLen
= 0;
354 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+
355 RecvReq
->BufferCount
+
359 MIN( RecvReq
->BufferArray
[0].len
, BytesAvailable
);
361 AFD_DbgPrint(MID_TRACE
,("BytesToCopy: %d len %d\n", BytesToCopy
,
362 RecvReq
->BufferArray
[0].len
));
365 /* Copy the address */
366 if( Map
[1].Mdl
&& Map
[2].Mdl
) {
367 AFD_DbgPrint(MID_TRACE
,("Checking TAAddressCount\n"));
369 if( DatagramRecv
->Address
->TAAddressCount
!= 1 ) {
372 ("Wierd address count %d\n",
373 DatagramRecv
->Address
->TAAddressCount
));
376 AFD_DbgPrint(MID_TRACE
,("Computing addr len\n"));
378 AddrLen
= MIN(DatagramRecv
->Address
->Address
->AddressLength
+
380 RecvReq
->BufferArray
[1].len
);
382 AFD_DbgPrint(MID_TRACE
,("Copying %d bytes of address\n", AddrLen
));
384 Map
[1].BufferAddress
= MmMapLockedPages( Map
[1].Mdl
, KernelMode
);
386 AFD_DbgPrint(MID_TRACE
,("Done mapping, copying address\n"));
388 RtlCopyMemory( Map
[1].BufferAddress
,
389 &DatagramRecv
->Address
->Address
->AddressType
,
392 MmUnmapLockedPages( Map
[1].BufferAddress
, Map
[1].Mdl
);
394 AFD_DbgPrint(MID_TRACE
,("Copying address len\n"));
396 Map
[2].BufferAddress
= MmMapLockedPages( Map
[2].Mdl
, KernelMode
);
397 *((PINT
)Map
[2].BufferAddress
) = AddrLen
;
398 MmUnmapLockedPages( Map
[2].BufferAddress
, Map
[2].Mdl
);
401 AFD_DbgPrint(MID_TRACE
,("Mapping data buffer pages\n"));
403 Map
[0].BufferAddress
= MmMapLockedPages( Map
[0].Mdl
, KernelMode
);
405 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
407 Map
[0].BufferAddress
,
411 ( FCB->Recv.Window + FCB->Recv.BytesUsed, BytesToCopy ); */
413 RtlCopyMemory( Map
[0].BufferAddress
,
414 FCB
->Recv
.Window
+ FCB
->Recv
.BytesUsed
,
417 MmUnmapLockedPages( Map
[0].BufferAddress
, Map
[0].Mdl
);
419 *TotalBytesCopied
= BytesToCopy
;
421 if (!RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
) {
422 FCB
->Recv
.BytesUsed
= 0;
426 Status
= Irp
->IoStatus
.Status
= STATUS_SUCCESS
;
427 Irp
->IoStatus
.Information
= BytesToCopy
;
428 ExFreePool( DatagramRecv
->Address
);
429 ExFreePool( DatagramRecv
);
431 AFD_DbgPrint(MID_TRACE
,("Done\n"));
437 PacketSocketRecvComplete(
438 PDEVICE_OBJECT DeviceObject
,
441 NTSTATUS Status
= STATUS_SUCCESS
;
442 PAFD_FCB FCB
= Context
;
444 PIO_STACK_LOCATION NextIrpSp
;
445 PLIST_ENTRY ListEntry
;
446 PAFD_RECV_INFO RecvReq
;
447 PAFD_STORED_DATAGRAM DatagramRecv
;
448 UINT DGSize
= Irp
->IoStatus
.Information
+ sizeof( AFD_STORED_DATAGRAM
);
450 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
452 if( !SocketAcquireStateLock( FCB
) ) return STATUS_UNSUCCESSFUL
;
454 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
456 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
457 SocketStateUnlock( FCB
);
458 DestroySocket( FCB
);
459 return STATUS_SUCCESS
;
462 DatagramRecv
= ExAllocatePool( NonPagedPool
, DGSize
);
465 DatagramRecv
->Len
= Irp
->IoStatus
.Information
;
466 RtlCopyMemory( DatagramRecv
->Buffer
, FCB
->Recv
.Window
,
468 AFD_DbgPrint(MID_TRACE
,("Received (A %x)\n",
469 FCB
->AddressFrom
->RemoteAddress
));
470 DatagramRecv
->Address
=
471 TaCopyTransportAddress( FCB
->AddressFrom
->RemoteAddress
);
473 InsertTailList( &FCB
->DatagramList
, &DatagramRecv
->ListEntry
);
474 } else Status
= STATUS_NO_MEMORY
;
476 if( !NT_SUCCESS( Status
) ) {
477 SocketStateUnlock( FCB
);
481 /* Satisfy as many requests as we can */
483 while( !IsListEmpty( &FCB
->DatagramList
) &&
484 !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
485 AFD_DbgPrint(MID_TRACE
,("Looping trying to satisfy request\n"));
486 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
487 DatagramRecv
= CONTAINING_RECORD( ListEntry
, AFD_STORED_DATAGRAM
,
489 ListEntry
= RemoveHeadList( &FCB
->PendingIrpList
[FUNCTION_RECV
] );
490 NextIrp
= CONTAINING_RECORD( ListEntry
, IRP
, Tail
.Overlay
.ListEntry
);
491 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
492 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
494 AFD_DbgPrint(MID_TRACE
,("RecvReq: %x, DatagramRecv: %x\n",
495 RecvReq
, DatagramRecv
));
497 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
498 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
499 InsertHeadList( &FCB
->DatagramList
,
500 &DatagramRecv
->ListEntry
);
501 Status
= NextIrp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
502 NextIrp
->IoStatus
.Information
= DatagramRecv
->Len
;
503 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
504 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
505 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
507 AFD_DbgPrint(MID_TRACE
,("Satisfying\n"));
508 Status
= SatisfyPacketRecvRequest
509 ( FCB
, NextIrp
, DatagramRecv
,
510 (PUINT
)&NextIrp
->IoStatus
.Information
);
511 AFD_DbgPrint(MID_TRACE
,("Unlocking\n"));
512 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
513 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
514 AFD_DbgPrint(MID_TRACE
,("Completing\n"));
515 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
519 if( !IsListEmpty( &FCB
->DatagramList
) ) {
520 AFD_DbgPrint(MID_TRACE
,("Signalling\n"));
521 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
523 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
525 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
527 if( NT_SUCCESS(Irp
->IoStatus
.Status
) ) {
528 /* Now relaunch the datagram request */
529 SocketCalloutEnter( FCB
);
531 Status
= TdiReceiveDatagram
532 ( &FCB
->ReceiveIrp
.InFlightRequest
,
533 FCB
->AddressFile
.Object
,
538 &FCB
->ReceiveIrp
.Iosb
,
539 PacketSocketRecvComplete
,
542 SocketCalloutLeave( FCB
);
545 SocketStateUnlock( FCB
);
547 return STATUS_SUCCESS
;
551 AfdPacketSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
552 PIO_STACK_LOCATION IrpSp
) {
553 NTSTATUS Status
= STATUS_SUCCESS
;
554 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
555 PAFD_FCB FCB
= FileObject
->FsContext
;
556 PAFD_RECV_INFO_UDP RecvReq
;
557 PLIST_ENTRY ListEntry
;
558 PAFD_STORED_DATAGRAM DatagramRecv
;
560 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
562 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
564 FCB
->EventsFired
&= ~AFD_EVENT_RECEIVE
;
566 /* Check that the socket is bound */
567 if( FCB
->State
!= SOCKET_STATE_BOUND
)
568 return UnlockAndMaybeComplete
569 ( FCB
, STATUS_UNSUCCESSFUL
, Irp
, 0, NULL
);
570 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
571 return UnlockAndMaybeComplete
572 ( FCB
, STATUS_NO_MEMORY
, Irp
, 0, NULL
);
574 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
576 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
577 RecvReq
->BufferCount
,
579 RecvReq
->AddressLength
,
582 if( !RecvReq
->BufferArray
) { /* access violation in userspace */
583 return UnlockAndMaybeComplete
584 ( FCB
, STATUS_ACCESS_VIOLATION
, Irp
, 0, NULL
);
587 if( !IsListEmpty( &FCB
->DatagramList
) ) {
588 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
589 DatagramRecv
= CONTAINING_RECORD
590 ( ListEntry
, AFD_STORED_DATAGRAM
, ListEntry
);
591 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
592 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
593 InsertHeadList( &FCB
->DatagramList
,
594 &DatagramRecv
->ListEntry
);
595 Status
= Irp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
596 Irp
->IoStatus
.Information
= DatagramRecv
->Len
;
598 if( IsListEmpty( &FCB
->DatagramList
) )
599 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
601 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
603 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
605 return UnlockAndMaybeComplete
606 ( FCB
, Status
, Irp
, RecvReq
->BufferArray
[0].len
, NULL
);
608 Status
= SatisfyPacketRecvRequest
609 ( FCB
, Irp
, DatagramRecv
,
610 (PUINT
)&Irp
->IoStatus
.Information
);
612 if( IsListEmpty( &FCB
->DatagramList
) )
613 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
615 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
617 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
619 return UnlockAndMaybeComplete
620 ( FCB
, Status
, Irp
, Irp
->IoStatus
.Information
, NULL
);
622 } else if( RecvReq
->AfdFlags
& AFD_IMMEDIATE
) {
623 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
624 Status
= STATUS_CANT_WAIT
;
625 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
626 return UnlockAndMaybeComplete( FCB
, Status
, Irp
, 0, NULL
);
628 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
629 return LeaveIrpUntilLater( FCB
, Irp
, FUNCTION_RECV
);