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
;
35 static NTSTATUS
TryToSatisfyRecvRequestFromBuffer( PAFD_FCB FCB
,
36 PAFD_RECV_INFO RecvReq
,
37 PUINT TotalBytesCopied
) {
38 UINT i
, BytesToCopy
= 0,
40 FCB
->Recv
.Content
- FCB
->Recv
.BytesUsed
;
43 *TotalBytesCopied
= 0;
46 AFD_DbgPrint(MID_TRACE
,("Called, BytesAvailable = %d\n",
49 if( CantReadMore(FCB
) ) return STATUS_PENDING
;
51 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+ RecvReq
->BufferCount
);
53 AFD_DbgPrint(MID_TRACE
,("Buffer Count: %d @ %x\n",
55 RecvReq
->BufferArray
));
57 RecvReq
->BufferArray
&&
59 i
< RecvReq
->BufferCount
;
62 MIN( RecvReq
->BufferArray
[i
].len
, BytesAvailable
);
65 Map
[i
].BufferAddress
= MmMapLockedPages( Map
[i
].Mdl
, KernelMode
);
67 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
72 RtlCopyMemory( Map
[i
].BufferAddress
,
73 FCB
->Recv
.Window
+ FCB
->Recv
.BytesUsed
,
76 MmUnmapLockedPages( Map
[i
].BufferAddress
, Map
[i
].Mdl
);
78 *TotalBytesCopied
+= BytesToCopy
;
80 if (!(RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
)) {
81 FCB
->Recv
.BytesUsed
+= BytesToCopy
;
82 BytesAvailable
-= BytesToCopy
;
87 /* If there's nothing left in our buffer start a new request */
88 if( FCB
->Recv
.BytesUsed
== FCB
->Recv
.Content
) {
89 FCB
->Recv
.BytesUsed
= FCB
->Recv
.Content
= 0;
90 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
91 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
93 if( !FCB
->ReceiveIrp
.InFlightRequest
) {
94 AFD_DbgPrint(MID_TRACE
,("Replenishing buffer\n"));
96 Status
= TdiReceive( &FCB
->ReceiveIrp
.InFlightRequest
,
97 FCB
->Connection
.Object
,
101 &FCB
->ReceiveIrp
.Iosb
,
105 if( Status
== STATUS_SUCCESS
)
106 FCB
->Recv
.Content
= FCB
->ReceiveIrp
.Iosb
.Information
;
110 return STATUS_SUCCESS
;
113 static NTSTATUS
ReceiveActivity( PAFD_FCB FCB
, PIRP Irp
) {
114 PLIST_ENTRY NextIrpEntry
;
116 PIO_STACK_LOCATION NextIrpSp
;
117 PAFD_RECV_INFO RecvReq
;
118 UINT TotalBytesCopied
= 0, RetBytesCopied
= 0;
119 NTSTATUS Status
= STATUS_SUCCESS
, RetStatus
= STATUS_PENDING
;
121 AFD_DbgPrint(MID_TRACE
,("%x %x\n", FCB
, Irp
));
123 /* Kick the user that receive would be possible now */
124 /* XXX Not implemented yet */
126 AFD_DbgPrint(MID_TRACE
,("FCB %x Receive data waiting %d\n",
127 FCB
, FCB
->Recv
.Content
));
129 /* Try to clear some requests */
130 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
131 NextIrpEntry
= RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
132 NextIrp
= CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
133 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
134 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
136 AFD_DbgPrint(MID_TRACE
,("RecvReq @ %x\n", RecvReq
));
138 Status
= TryToSatisfyRecvRequestFromBuffer( FCB
, RecvReq
, &TotalBytesCopied
);
140 if( Status
== STATUS_PENDING
) {
141 AFD_DbgPrint(MID_TRACE
,("Ran out of data for %x\n", NextIrp
));
142 InsertHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
],
143 &NextIrp
->Tail
.Overlay
.ListEntry
);
146 AFD_DbgPrint(MID_TRACE
,("Completing recv %x (%d)\n", NextIrp
,
148 UnlockBuffers( RecvReq
->BufferArray
,
149 RecvReq
->BufferCount
, FALSE
);
150 NextIrp
->IoStatus
.Status
= Status
;
151 NextIrp
->IoStatus
.Information
= TotalBytesCopied
;
152 if( NextIrp
== Irp
) {
154 RetBytesCopied
= TotalBytesCopied
;
156 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
157 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
161 if( !CantReadMore(FCB
) ) {
162 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
164 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
166 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
168 AFD_DbgPrint(MID_TRACE
,("RetStatus for irp %x is %x\n", Irp
, RetStatus
));
170 /* Sometimes we're called with a NULL Irp */
172 Irp
->IoStatus
.Status
= RetStatus
;
173 Irp
->IoStatus
.Information
= RetBytesCopied
;
179 NTSTATUS NTAPI ReceiveComplete
180 ( PDEVICE_OBJECT DeviceObject
,
183 PAFD_FCB FCB
= (PAFD_FCB
)Context
;
184 PLIST_ENTRY NextIrpEntry
;
186 PAFD_RECV_INFO RecvReq
;
187 PIO_STACK_LOCATION NextIrpSp
;
189 AFD_DbgPrint(MID_TRACE
,("Called\n"));
191 ASSERT_IRQL(APC_LEVEL
);
193 if( !SocketAcquireStateLock( FCB
) )
194 return STATUS_FILE_CLOSED
;
196 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
198 FCB
->Recv
.Content
= Irp
->IoStatus
.Information
;
199 FCB
->Recv
.BytesUsed
= 0;
201 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
202 AFD_DbgPrint(MIN_TRACE
,("!!! CLOSING SOCK GOT A RECEIVE COMPLETE !!!\n"));
203 /* Cleanup our IRP queue because the FCB is being destroyed */
204 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
205 NextIrpEntry
= RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
206 NextIrp
= CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
207 NextIrpSp
= IoGetCurrentIrpStackLocation(NextIrp
);
208 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
209 NextIrp
->IoStatus
.Status
= STATUS_FILE_CLOSED
;
210 NextIrp
->IoStatus
.Information
= 0;
211 UnlockBuffers(RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
212 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
213 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
215 SocketStateUnlock( FCB
);
216 return STATUS_FILE_CLOSED
;
217 } else if( FCB
->State
== SOCKET_STATE_LISTENING
) {
218 AFD_DbgPrint(MIN_TRACE
,("!!! LISTENER GOT A RECEIVE COMPLETE !!!\n"));
219 SocketStateUnlock( FCB
);
220 return STATUS_INVALID_PARAMETER
;
223 ReceiveActivity( FCB
, NULL
);
225 SocketStateUnlock( FCB
);
227 return STATUS_SUCCESS
;
231 AfdConnectedSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
232 PIO_STACK_LOCATION IrpSp
, BOOLEAN Short
) {
233 NTSTATUS Status
= STATUS_INVALID_PARAMETER
;
234 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
235 PAFD_FCB FCB
= FileObject
->FsContext
;
236 PAFD_RECV_INFO RecvReq
;
237 UINT TotalBytesCopied
= 0;
239 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
241 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
243 if( FCB
->State
!= SOCKET_STATE_CONNECTED
&&
244 FCB
->State
!= SOCKET_STATE_CONNECTING
) {
245 AFD_DbgPrint(MID_TRACE
,("Called recv on wrong kind of socket (s%x)\n",
247 return UnlockAndMaybeComplete( FCB
, STATUS_INVALID_PARAMETER
,
251 if( FCB
->Flags
& AFD_ENDPOINT_CONNECTIONLESS
)
253 AFD_DbgPrint(MID_TRACE
,("Receive on connection-less sockets not implemented\n"));
254 return UnlockAndMaybeComplete( FCB
, STATUS_NOT_IMPLEMENTED
,
258 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
259 return UnlockAndMaybeComplete( FCB
, STATUS_NO_MEMORY
,
262 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
264 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
265 RecvReq
->BufferCount
,
269 if( !RecvReq
->BufferArray
) {
270 return UnlockAndMaybeComplete( FCB
, STATUS_ACCESS_VIOLATION
,
274 Irp
->IoStatus
.Status
= STATUS_PENDING
;
275 Irp
->IoStatus
.Information
= 0;
277 InsertTailList( &FCB
->PendingIrpList
[FUNCTION_RECV
],
278 &Irp
->Tail
.Overlay
.ListEntry
);
280 /************ From this point, the IRP is not ours ************/
282 Status
= ReceiveActivity( FCB
, Irp
);
284 if( Status
== STATUS_PENDING
&& (RecvReq
->AfdFlags
& AFD_IMMEDIATE
) ) {
285 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
286 Status
= STATUS_CANT_WAIT
;
287 TotalBytesCopied
= 0;
288 RemoveEntryList( &Irp
->Tail
.Overlay
.ListEntry
);
289 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
290 return UnlockAndMaybeComplete( FCB
, Status
, Irp
,
292 } else if( Status
== STATUS_PENDING
) {
293 AFD_DbgPrint(MID_TRACE
,("Leaving read irp\n"));
294 IoMarkIrpPending( Irp
);
296 AFD_DbgPrint(MID_TRACE
,("Completed with status %x\n", Status
));
299 SocketStateUnlock( FCB
);
304 static NTSTATUS NTAPI
305 SatisfyPacketRecvRequest( PAFD_FCB FCB
, PIRP Irp
,
306 PAFD_STORED_DATAGRAM DatagramRecv
,
307 PUINT TotalBytesCopied
) {
308 NTSTATUS Status
= STATUS_SUCCESS
;
309 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
310 PAFD_RECV_INFO RecvReq
=
311 IrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
312 UINT BytesToCopy
= 0, BytesAvailable
= DatagramRecv
->Len
, AddrLen
= 0;
315 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+
316 RecvReq
->BufferCount
+
320 MIN( RecvReq
->BufferArray
[0].len
, BytesAvailable
);
322 AFD_DbgPrint(MID_TRACE
,("BytesToCopy: %d len %d\n", BytesToCopy
,
323 RecvReq
->BufferArray
[0].len
));
326 /* Copy the address */
327 if( Map
[1].Mdl
&& Map
[2].Mdl
) {
328 AFD_DbgPrint(MID_TRACE
,("Checking TAAddressCount\n"));
330 if( DatagramRecv
->Address
->TAAddressCount
!= 1 ) {
333 ("Wierd address count %d\n",
334 DatagramRecv
->Address
->TAAddressCount
));
337 AFD_DbgPrint(MID_TRACE
,("Computing addr len\n"));
339 AddrLen
= MIN(DatagramRecv
->Address
->Address
->AddressLength
+
341 RecvReq
->BufferArray
[1].len
);
343 AFD_DbgPrint(MID_TRACE
,("Copying %d bytes of address\n", AddrLen
));
345 Map
[1].BufferAddress
= MmMapLockedPages( Map
[1].Mdl
, KernelMode
);
347 AFD_DbgPrint(MID_TRACE
,("Done mapping, copying address\n"));
349 RtlCopyMemory( Map
[1].BufferAddress
,
350 &DatagramRecv
->Address
->Address
->AddressType
,
353 MmUnmapLockedPages( Map
[1].BufferAddress
, Map
[1].Mdl
);
355 AFD_DbgPrint(MID_TRACE
,("Copying address len\n"));
357 Map
[2].BufferAddress
= MmMapLockedPages( Map
[2].Mdl
, KernelMode
);
358 *((PINT
)Map
[2].BufferAddress
) = AddrLen
;
359 MmUnmapLockedPages( Map
[2].BufferAddress
, Map
[2].Mdl
);
362 AFD_DbgPrint(MID_TRACE
,("Mapping data buffer pages\n"));
364 Map
[0].BufferAddress
= MmMapLockedPages( Map
[0].Mdl
, KernelMode
);
366 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
368 Map
[0].BufferAddress
,
372 ( FCB->Recv.Window + FCB->Recv.BytesUsed, BytesToCopy ); */
374 RtlCopyMemory( Map
[0].BufferAddress
,
375 FCB
->Recv
.Window
+ FCB
->Recv
.BytesUsed
,
378 MmUnmapLockedPages( Map
[0].BufferAddress
, Map
[0].Mdl
);
380 *TotalBytesCopied
= BytesToCopy
;
382 if (!(RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
)) {
383 FCB
->Recv
.BytesUsed
= 0;
387 Status
= Irp
->IoStatus
.Status
= STATUS_SUCCESS
;
388 Irp
->IoStatus
.Information
= BytesToCopy
;
389 ExFreePool( DatagramRecv
->Address
);
390 ExFreePool( DatagramRecv
);
392 AFD_DbgPrint(MID_TRACE
,("Done\n"));
398 PacketSocketRecvComplete(
399 PDEVICE_OBJECT DeviceObject
,
402 NTSTATUS Status
= STATUS_SUCCESS
;
403 PAFD_FCB FCB
= Context
;
405 PIO_STACK_LOCATION NextIrpSp
;
406 PLIST_ENTRY ListEntry
;
407 PAFD_RECV_INFO RecvReq
;
408 PAFD_STORED_DATAGRAM DatagramRecv
;
409 UINT DGSize
= Irp
->IoStatus
.Information
+ sizeof( AFD_STORED_DATAGRAM
);
410 PLIST_ENTRY NextIrpEntry
, DatagramRecvEntry
;
412 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
414 if( !SocketAcquireStateLock( FCB
) )
415 return STATUS_FILE_CLOSED
;
417 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
419 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
420 /* Cleanup our IRP queue because the FCB is being destroyed */
421 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
422 NextIrpEntry
= RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
423 NextIrp
= CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
424 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
425 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
426 NextIrp
->IoStatus
.Status
= STATUS_FILE_CLOSED
;
427 NextIrp
->IoStatus
.Information
= 0;
428 UnlockBuffers(RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
429 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
430 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
433 /* Free all items on the datagram list */
434 while( !IsListEmpty( &FCB
->DatagramList
) ) {
435 DatagramRecvEntry
= RemoveHeadList(&FCB
->DatagramList
);
436 DatagramRecv
= CONTAINING_RECORD(DatagramRecvEntry
, AFD_STORED_DATAGRAM
, ListEntry
);
437 ExFreePool( DatagramRecv
->Address
);
438 ExFreePool( DatagramRecv
);
441 SocketStateUnlock( FCB
);
442 return STATUS_FILE_CLOSED
;
445 DatagramRecv
= ExAllocatePool( NonPagedPool
, DGSize
);
448 DatagramRecv
->Len
= Irp
->IoStatus
.Information
;
449 RtlCopyMemory( DatagramRecv
->Buffer
, FCB
->Recv
.Window
,
451 AFD_DbgPrint(MID_TRACE
,("Received (A %x)\n",
452 FCB
->AddressFrom
->RemoteAddress
));
453 DatagramRecv
->Address
=
454 TaCopyTransportAddress( FCB
->AddressFrom
->RemoteAddress
);
456 if( !DatagramRecv
->Address
) Status
= STATUS_NO_MEMORY
;
458 } else Status
= STATUS_NO_MEMORY
;
460 if( !NT_SUCCESS( Status
) ) {
461 if( DatagramRecv
) ExFreePool( DatagramRecv
);
462 SocketStateUnlock( FCB
);
465 InsertTailList( &FCB
->DatagramList
, &DatagramRecv
->ListEntry
);
468 /* Satisfy as many requests as we can */
470 while( !IsListEmpty( &FCB
->DatagramList
) &&
471 !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
472 AFD_DbgPrint(MID_TRACE
,("Looping trying to satisfy request\n"));
473 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
474 DatagramRecv
= CONTAINING_RECORD( ListEntry
, AFD_STORED_DATAGRAM
,
476 ListEntry
= RemoveHeadList( &FCB
->PendingIrpList
[FUNCTION_RECV
] );
477 NextIrp
= CONTAINING_RECORD( ListEntry
, IRP
, Tail
.Overlay
.ListEntry
);
478 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
479 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
481 AFD_DbgPrint(MID_TRACE
,("RecvReq: %x, DatagramRecv: %x\n",
482 RecvReq
, DatagramRecv
));
484 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
485 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
486 InsertHeadList( &FCB
->DatagramList
,
487 &DatagramRecv
->ListEntry
);
488 Status
= NextIrp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
489 NextIrp
->IoStatus
.Information
= DatagramRecv
->Len
;
490 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
491 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
492 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
494 AFD_DbgPrint(MID_TRACE
,("Satisfying\n"));
495 Status
= SatisfyPacketRecvRequest
496 ( FCB
, NextIrp
, DatagramRecv
,
497 (PUINT
)&NextIrp
->IoStatus
.Information
);
498 AFD_DbgPrint(MID_TRACE
,("Unlocking\n"));
499 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
500 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
501 AFD_DbgPrint(MID_TRACE
,("Completing\n"));
502 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
506 if( !IsListEmpty( &FCB
->DatagramList
) ) {
507 AFD_DbgPrint(MID_TRACE
,("Signalling\n"));
508 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
510 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
512 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
514 if( NT_SUCCESS(Irp
->IoStatus
.Status
) ) {
515 /* Now relaunch the datagram request */
516 Status
= TdiReceiveDatagram
517 ( &FCB
->ReceiveIrp
.InFlightRequest
,
518 FCB
->AddressFile
.Object
,
523 &FCB
->ReceiveIrp
.Iosb
,
524 PacketSocketRecvComplete
,
528 SocketStateUnlock( FCB
);
530 return STATUS_SUCCESS
;
534 AfdPacketSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
535 PIO_STACK_LOCATION IrpSp
) {
536 NTSTATUS Status
= STATUS_SUCCESS
;
537 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
538 PAFD_FCB FCB
= FileObject
->FsContext
;
539 PAFD_RECV_INFO_UDP RecvReq
;
540 PLIST_ENTRY ListEntry
;
541 PAFD_STORED_DATAGRAM DatagramRecv
;
543 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
545 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
547 /* Check that the socket is bound */
548 if( FCB
->State
!= SOCKET_STATE_BOUND
)
549 return UnlockAndMaybeComplete
550 ( FCB
, STATUS_INVALID_PARAMETER
, Irp
, 0 );
551 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
552 return UnlockAndMaybeComplete
553 ( FCB
, STATUS_NO_MEMORY
, Irp
, 0 );
555 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
557 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
558 RecvReq
->BufferCount
,
560 RecvReq
->AddressLength
,
563 if( !RecvReq
->BufferArray
) { /* access violation in userspace */
564 return UnlockAndMaybeComplete
565 ( FCB
, STATUS_ACCESS_VIOLATION
, Irp
, 0 );
568 if( !IsListEmpty( &FCB
->DatagramList
) ) {
569 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
570 DatagramRecv
= CONTAINING_RECORD
571 ( ListEntry
, AFD_STORED_DATAGRAM
, ListEntry
);
572 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
573 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
574 InsertHeadList( &FCB
->DatagramList
,
575 &DatagramRecv
->ListEntry
);
576 Status
= Irp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
577 Irp
->IoStatus
.Information
= DatagramRecv
->Len
;
579 if( IsListEmpty( &FCB
->DatagramList
) )
580 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
582 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
584 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
586 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
588 return UnlockAndMaybeComplete
589 ( FCB
, Status
, Irp
, Irp
->IoStatus
.Information
);
591 Status
= SatisfyPacketRecvRequest
592 ( FCB
, Irp
, DatagramRecv
,
593 (PUINT
)&Irp
->IoStatus
.Information
);
595 if( IsListEmpty( &FCB
->DatagramList
) )
596 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
598 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
600 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
602 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
604 return UnlockAndMaybeComplete
605 ( FCB
, Status
, Irp
, Irp
->IoStatus
.Information
);
607 } else if( RecvReq
->AfdFlags
& AFD_IMMEDIATE
) {
608 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
609 Status
= STATUS_CANT_WAIT
;
610 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
611 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
612 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
613 return UnlockAndMaybeComplete( FCB
, Status
, Irp
, 0 );
615 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
616 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
617 return LeaveIrpUntilLater( FCB
, Irp
, FUNCTION_RECV
);