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 VOID
HandleEOFOnIrp( PAFD_FCB FCB
, NTSTATUS Status
, ULONG_PTR Information
)
31 if( ( Status
== STATUS_SUCCESS
&& !Information
) ||
32 ( !NT_SUCCESS( Status
) ) )
34 /* The socket has been closed */
35 FCB
->PollState
|= AFD_EVENT_DISCONNECT
;
36 FCB
->PollStatus
[FD_CLOSE_BIT
] = Status
;
38 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
42 static BOOLEAN
CantReadMore( PAFD_FCB FCB
) {
43 UINT BytesAvailable
= FCB
->Recv
.Content
- FCB
->Recv
.BytesUsed
;
45 return !BytesAvailable
&&
46 (FCB
->PollState
& (AFD_EVENT_CLOSE
| AFD_EVENT_DISCONNECT
));
49 static VOID
RefillSocketBuffer( PAFD_FCB FCB
) {
52 if( !FCB
->ReceiveIrp
.InFlightRequest
) {
53 AFD_DbgPrint(MID_TRACE
,("Replenishing buffer\n"));
55 Status
= TdiReceive( &FCB
->ReceiveIrp
.InFlightRequest
,
56 FCB
->Connection
.Object
,
60 &FCB
->ReceiveIrp
.Iosb
,
64 if( Status
== STATUS_SUCCESS
&& FCB
->ReceiveIrp
.Iosb
.Information
)
66 FCB
->Recv
.Content
= FCB
->ReceiveIrp
.Iosb
.Information
;
67 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
68 FCB
->PollStatus
[FD_READ_BIT
] = STATUS_SUCCESS
;
70 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
75 HandleEOFOnIrp(FCB
, Status
, FCB
->ReceiveIrp
.Iosb
.Information
);
80 static NTSTATUS
TryToSatisfyRecvRequestFromBuffer( PAFD_FCB FCB
,
81 PAFD_RECV_INFO RecvReq
,
82 PUINT TotalBytesCopied
) {
83 UINT i
, BytesToCopy
= 0, FcbBytesCopied
= FCB
->Recv
.BytesUsed
,
85 FCB
->Recv
.Content
- FCB
->Recv
.BytesUsed
;
87 *TotalBytesCopied
= 0;
90 AFD_DbgPrint(MID_TRACE
,("Called, BytesAvailable = %d\n",
93 if( CantReadMore(FCB
) ) return STATUS_SUCCESS
;
94 if( !BytesAvailable
) return STATUS_PENDING
;
96 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+ RecvReq
->BufferCount
);
98 AFD_DbgPrint(MID_TRACE
,("Buffer Count: %d @ %x\n",
100 RecvReq
->BufferArray
));
102 RecvReq
->BufferArray
&&
104 i
< RecvReq
->BufferCount
;
107 MIN( RecvReq
->BufferArray
[i
].len
, BytesAvailable
);
110 Map
[i
].BufferAddress
= MmMapLockedPages( Map
[i
].Mdl
, KernelMode
);
112 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
114 Map
[i
].BufferAddress
,
117 RtlCopyMemory( Map
[i
].BufferAddress
,
118 FCB
->Recv
.Window
+ FcbBytesCopied
,
121 MmUnmapLockedPages( Map
[i
].BufferAddress
, Map
[i
].Mdl
);
123 *TotalBytesCopied
+= BytesToCopy
;
124 FcbBytesCopied
+= BytesToCopy
;
125 BytesAvailable
-= BytesToCopy
;
127 if (!(RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
))
128 FCB
->Recv
.BytesUsed
+= BytesToCopy
;
132 /* If there's nothing left in our buffer start a new request */
133 if( FCB
->Recv
.BytesUsed
== FCB
->Recv
.Content
) {
134 FCB
->Recv
.BytesUsed
= FCB
->Recv
.Content
= 0;
135 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
137 RefillSocketBuffer( FCB
);
140 return STATUS_SUCCESS
;
143 static NTSTATUS
ReceiveActivity( PAFD_FCB FCB
, PIRP Irp
) {
144 PLIST_ENTRY NextIrpEntry
;
146 PIO_STACK_LOCATION NextIrpSp
;
147 PAFD_RECV_INFO RecvReq
;
148 UINT TotalBytesCopied
= 0, RetBytesCopied
= 0;
149 NTSTATUS Status
= STATUS_SUCCESS
, RetStatus
= STATUS_PENDING
;
151 AFD_DbgPrint(MID_TRACE
,("%x %x\n", FCB
, Irp
));
153 /* Kick the user that receive would be possible now */
154 /* XXX Not implemented yet */
156 AFD_DbgPrint(MID_TRACE
,("FCB %x Receive data waiting %d\n",
157 FCB
, FCB
->Recv
.Content
));
159 if( CantReadMore( FCB
) ) {
160 /* Success here means that we got an EOF. Complete a pending read
161 * with zero bytes if we haven't yet overread, then kill the others.
163 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
165 RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
167 CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
168 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
169 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
171 AFD_DbgPrint(MID_TRACE
,("Completing recv %x (%d)\n", NextIrp
,
173 UnlockBuffers( RecvReq
->BufferArray
,
174 RecvReq
->BufferCount
, FALSE
);
175 Status
= NextIrp
->IoStatus
.Status
=
176 FCB
->Overread
? STATUS_END_OF_FILE
: STATUS_SUCCESS
;
177 NextIrp
->IoStatus
.Information
= 0;
178 if( NextIrp
== Irp
) RetStatus
= Status
;
179 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
180 (void)IoSetCancelRoutine(NextIrp
, NULL
);
181 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
182 FCB
->Overread
= TRUE
;
185 /* Kick the user that receive would be possible now */
186 /* XXX Not implemented yet */
188 AFD_DbgPrint(MID_TRACE
,("FCB %x Receive data waiting %d\n",
189 FCB
, FCB
->Recv
.Content
));
190 /*OskitDumpBuffer( FCB->Recv.Window, FCB->Recv.Content );*/
192 /* Try to clear some requests */
193 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
195 RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
197 CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
198 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
199 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
201 AFD_DbgPrint(MID_TRACE
,("RecvReq @ %x\n", RecvReq
));
203 Status
= TryToSatisfyRecvRequestFromBuffer
204 ( FCB
, RecvReq
, &TotalBytesCopied
);
206 if( Status
== STATUS_PENDING
) {
207 AFD_DbgPrint(MID_TRACE
,("Ran out of data for %x\n", NextIrp
));
208 InsertHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
],
209 &NextIrp
->Tail
.Overlay
.ListEntry
);
212 AFD_DbgPrint(MID_TRACE
,("Completing recv %x (%d)\n", NextIrp
,
214 UnlockBuffers( RecvReq
->BufferArray
,
215 RecvReq
->BufferCount
, FALSE
);
216 NextIrp
->IoStatus
.Status
= Status
;
217 NextIrp
->IoStatus
.Information
= TotalBytesCopied
;
218 if( NextIrp
== Irp
) {
220 RetBytesCopied
= TotalBytesCopied
;
222 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
223 (void)IoSetCancelRoutine(NextIrp
, NULL
);
224 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
229 if( FCB
->Recv
.Content
) {
230 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
231 FCB
->PollStatus
[FD_READ_BIT
] = STATUS_SUCCESS
;
232 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
234 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
236 AFD_DbgPrint(MID_TRACE
,("RetStatus for irp %x is %x\n", Irp
, RetStatus
));
238 /* Sometimes we're called with a NULL Irp */
240 Irp
->IoStatus
.Status
= RetStatus
;
241 Irp
->IoStatus
.Information
= RetBytesCopied
;
247 NTSTATUS NTAPI ReceiveComplete
248 ( PDEVICE_OBJECT DeviceObject
,
251 PAFD_FCB FCB
= (PAFD_FCB
)Context
;
252 PLIST_ENTRY NextIrpEntry
;
254 PAFD_RECV_INFO RecvReq
;
255 PIO_STACK_LOCATION NextIrpSp
;
257 AFD_DbgPrint(MID_TRACE
,("Called\n"));
259 if( !SocketAcquireStateLock( FCB
) )
260 return STATUS_FILE_CLOSED
;
262 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
264 FCB
->Recv
.Content
= Irp
->IoStatus
.Information
;
265 FCB
->Recv
.BytesUsed
= 0;
267 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
268 AFD_DbgPrint(MIN_TRACE
,("!!! CLOSING SOCK GOT A RECEIVE COMPLETE !!!\n"));
269 /* Cleanup our IRP queue because the FCB is being destroyed */
270 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
271 NextIrpEntry
= RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
272 NextIrp
= CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
273 NextIrpSp
= IoGetCurrentIrpStackLocation(NextIrp
);
274 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
275 NextIrp
->IoStatus
.Status
= STATUS_FILE_CLOSED
;
276 NextIrp
->IoStatus
.Information
= 0;
277 UnlockBuffers(RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
278 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
279 (void)IoSetCancelRoutine(NextIrp
, NULL
);
280 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
282 SocketStateUnlock( FCB
);
283 return STATUS_FILE_CLOSED
;
284 } else if( FCB
->State
== SOCKET_STATE_LISTENING
) {
285 AFD_DbgPrint(MIN_TRACE
,("!!! LISTENER GOT A RECEIVE COMPLETE !!!\n"));
286 SocketStateUnlock( FCB
);
287 return STATUS_INVALID_PARAMETER
;
290 HandleEOFOnIrp( FCB
, Irp
->IoStatus
.Status
, Irp
->IoStatus
.Information
);
292 ReceiveActivity( FCB
, NULL
);
294 SocketStateUnlock( FCB
);
296 return STATUS_SUCCESS
;
300 AfdConnectedSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
301 PIO_STACK_LOCATION IrpSp
, BOOLEAN Short
) {
302 NTSTATUS Status
= STATUS_INVALID_PARAMETER
;
303 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
304 PAFD_FCB FCB
= FileObject
->FsContext
;
305 PAFD_RECV_INFO RecvReq
;
306 UINT TotalBytesCopied
= 0;
308 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
310 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
312 if( FCB
->State
!= SOCKET_STATE_CONNECTED
&&
313 FCB
->State
!= SOCKET_STATE_CONNECTING
) {
314 AFD_DbgPrint(MID_TRACE
,("Called recv on wrong kind of socket (s%x)\n",
316 return UnlockAndMaybeComplete( FCB
, STATUS_INVALID_PARAMETER
,
320 if( FCB
->Flags
& AFD_ENDPOINT_CONNECTIONLESS
)
322 AFD_DbgPrint(MID_TRACE
,("Receive on connection-less sockets not implemented\n"));
323 return UnlockAndMaybeComplete( FCB
, STATUS_NOT_IMPLEMENTED
,
327 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
328 return UnlockAndMaybeComplete( FCB
, STATUS_NO_MEMORY
,
331 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
333 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
334 RecvReq
->BufferCount
,
338 if( !RecvReq
->BufferArray
) {
339 return UnlockAndMaybeComplete( FCB
, STATUS_ACCESS_VIOLATION
,
343 Irp
->IoStatus
.Status
= STATUS_PENDING
;
344 Irp
->IoStatus
.Information
= 0;
346 InsertTailList( &FCB
->PendingIrpList
[FUNCTION_RECV
],
347 &Irp
->Tail
.Overlay
.ListEntry
);
349 /************ From this point, the IRP is not ours ************/
351 Status
= ReceiveActivity( FCB
, Irp
);
353 if( Status
== STATUS_PENDING
&& (RecvReq
->AfdFlags
& AFD_IMMEDIATE
) ) {
354 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
355 Status
= STATUS_CANT_WAIT
;
356 TotalBytesCopied
= 0;
357 RemoveEntryList( &Irp
->Tail
.Overlay
.ListEntry
);
358 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
359 return UnlockAndMaybeComplete( FCB
, Status
, Irp
,
361 } else if( Status
== STATUS_PENDING
) {
362 AFD_DbgPrint(MID_TRACE
,("Leaving read irp\n"));
363 IoMarkIrpPending( Irp
);
364 (void)IoSetCancelRoutine(Irp
, AfdCancelHandler
);
366 AFD_DbgPrint(MID_TRACE
,("Completed with status %x\n", Status
));
369 SocketStateUnlock( FCB
);
374 static NTSTATUS NTAPI
375 SatisfyPacketRecvRequest( PAFD_FCB FCB
, PIRP Irp
,
376 PAFD_STORED_DATAGRAM DatagramRecv
,
377 PUINT TotalBytesCopied
) {
378 NTSTATUS Status
= STATUS_SUCCESS
;
379 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
380 PAFD_RECV_INFO RecvReq
=
381 IrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
382 UINT BytesToCopy
= 0, BytesAvailable
= DatagramRecv
->Len
, AddrLen
= 0;
385 Map
= (PAFD_MAPBUF
)(RecvReq
->BufferArray
+
386 RecvReq
->BufferCount
+
390 MIN( RecvReq
->BufferArray
[0].len
, BytesAvailable
);
392 AFD_DbgPrint(MID_TRACE
,("BytesToCopy: %d len %d\n", BytesToCopy
,
393 RecvReq
->BufferArray
[0].len
));
396 /* Copy the address */
397 if( Map
[1].Mdl
&& Map
[2].Mdl
) {
398 AFD_DbgPrint(MID_TRACE
,("Checking TAAddressCount\n"));
400 if( DatagramRecv
->Address
->TAAddressCount
!= 1 ) {
403 ("Wierd address count %d\n",
404 DatagramRecv
->Address
->TAAddressCount
));
407 AFD_DbgPrint(MID_TRACE
,("Computing addr len\n"));
409 AddrLen
= MIN(DatagramRecv
->Address
->Address
->AddressLength
+
411 RecvReq
->BufferArray
[1].len
);
413 AFD_DbgPrint(MID_TRACE
,("Copying %d bytes of address\n", AddrLen
));
415 Map
[1].BufferAddress
= MmMapLockedPages( Map
[1].Mdl
, KernelMode
);
417 AFD_DbgPrint(MID_TRACE
,("Done mapping, copying address\n"));
419 RtlCopyMemory( Map
[1].BufferAddress
,
420 &DatagramRecv
->Address
->Address
->AddressType
,
423 MmUnmapLockedPages( Map
[1].BufferAddress
, Map
[1].Mdl
);
425 AFD_DbgPrint(MID_TRACE
,("Copying address len\n"));
427 Map
[2].BufferAddress
= MmMapLockedPages( Map
[2].Mdl
, KernelMode
);
428 *((PINT
)Map
[2].BufferAddress
) = AddrLen
;
429 MmUnmapLockedPages( Map
[2].BufferAddress
, Map
[2].Mdl
);
432 AFD_DbgPrint(MID_TRACE
,("Mapping data buffer pages\n"));
434 Map
[0].BufferAddress
= MmMapLockedPages( Map
[0].Mdl
, KernelMode
);
436 AFD_DbgPrint(MID_TRACE
,("Buffer %d: %x:%d\n",
438 Map
[0].BufferAddress
,
442 ( FCB->Recv.Window + FCB->Recv.BytesUsed, BytesToCopy ); */
444 RtlCopyMemory( Map
[0].BufferAddress
,
445 FCB
->Recv
.Window
+ FCB
->Recv
.BytesUsed
,
448 MmUnmapLockedPages( Map
[0].BufferAddress
, Map
[0].Mdl
);
450 *TotalBytesCopied
= BytesToCopy
;
452 if (!(RecvReq
->TdiFlags
& TDI_RECEIVE_PEEK
)) {
453 FCB
->Recv
.BytesUsed
= 0;
457 Status
= Irp
->IoStatus
.Status
= STATUS_SUCCESS
;
458 Irp
->IoStatus
.Information
= BytesToCopy
;
459 ExFreePool( DatagramRecv
->Address
);
460 ExFreePool( DatagramRecv
);
462 AFD_DbgPrint(MID_TRACE
,("Done\n"));
468 PacketSocketRecvComplete(
469 PDEVICE_OBJECT DeviceObject
,
472 NTSTATUS Status
= STATUS_SUCCESS
;
473 PAFD_FCB FCB
= Context
;
475 PIO_STACK_LOCATION NextIrpSp
;
476 PLIST_ENTRY ListEntry
;
477 PAFD_RECV_INFO RecvReq
;
478 PAFD_STORED_DATAGRAM DatagramRecv
;
479 UINT DGSize
= Irp
->IoStatus
.Information
+ sizeof( AFD_STORED_DATAGRAM
);
480 PLIST_ENTRY NextIrpEntry
, DatagramRecvEntry
;
482 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
484 if( !SocketAcquireStateLock( FCB
) )
485 return STATUS_FILE_CLOSED
;
487 FCB
->ReceiveIrp
.InFlightRequest
= NULL
;
489 if( FCB
->State
== SOCKET_STATE_CLOSED
) {
490 /* Cleanup our IRP queue because the FCB is being destroyed */
491 while( !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
492 NextIrpEntry
= RemoveHeadList(&FCB
->PendingIrpList
[FUNCTION_RECV
]);
493 NextIrp
= CONTAINING_RECORD(NextIrpEntry
, IRP
, Tail
.Overlay
.ListEntry
);
494 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
495 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
496 NextIrp
->IoStatus
.Status
= STATUS_FILE_CLOSED
;
497 NextIrp
->IoStatus
.Information
= 0;
498 UnlockBuffers(RecvReq
->BufferArray
, RecvReq
->BufferCount
, FALSE
);
499 if( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
500 (void)IoSetCancelRoutine(NextIrp
, NULL
);
501 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
504 /* Free all items on the datagram list */
505 while( !IsListEmpty( &FCB
->DatagramList
) ) {
506 DatagramRecvEntry
= RemoveHeadList(&FCB
->DatagramList
);
507 DatagramRecv
= CONTAINING_RECORD(DatagramRecvEntry
, AFD_STORED_DATAGRAM
, ListEntry
);
508 ExFreePool( DatagramRecv
->Address
);
509 ExFreePool( DatagramRecv
);
512 SocketStateUnlock( FCB
);
513 return STATUS_FILE_CLOSED
;
516 DatagramRecv
= ExAllocatePool( NonPagedPool
, DGSize
);
519 DatagramRecv
->Len
= Irp
->IoStatus
.Information
;
520 RtlCopyMemory( DatagramRecv
->Buffer
, FCB
->Recv
.Window
,
522 AFD_DbgPrint(MID_TRACE
,("Received (A %x)\n",
523 FCB
->AddressFrom
->RemoteAddress
));
524 DatagramRecv
->Address
=
525 TaCopyTransportAddress( FCB
->AddressFrom
->RemoteAddress
);
527 if( !DatagramRecv
->Address
) Status
= STATUS_NO_MEMORY
;
529 } else Status
= STATUS_NO_MEMORY
;
531 if( !NT_SUCCESS( Status
) ) {
532 if( DatagramRecv
) ExFreePool( DatagramRecv
);
533 SocketStateUnlock( FCB
);
536 InsertTailList( &FCB
->DatagramList
, &DatagramRecv
->ListEntry
);
539 /* Satisfy as many requests as we can */
541 while( !IsListEmpty( &FCB
->DatagramList
) &&
542 !IsListEmpty( &FCB
->PendingIrpList
[FUNCTION_RECV
] ) ) {
543 AFD_DbgPrint(MID_TRACE
,("Looping trying to satisfy request\n"));
544 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
545 DatagramRecv
= CONTAINING_RECORD( ListEntry
, AFD_STORED_DATAGRAM
,
547 ListEntry
= RemoveHeadList( &FCB
->PendingIrpList
[FUNCTION_RECV
] );
548 NextIrp
= CONTAINING_RECORD( ListEntry
, IRP
, Tail
.Overlay
.ListEntry
);
549 NextIrpSp
= IoGetCurrentIrpStackLocation( NextIrp
);
550 RecvReq
= NextIrpSp
->Parameters
.DeviceIoControl
.Type3InputBuffer
;
552 AFD_DbgPrint(MID_TRACE
,("RecvReq: %x, DatagramRecv: %x\n",
553 RecvReq
, DatagramRecv
));
555 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
556 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
557 InsertHeadList( &FCB
->DatagramList
,
558 &DatagramRecv
->ListEntry
);
559 Status
= NextIrp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
560 NextIrp
->IoStatus
.Information
= DatagramRecv
->Len
;
561 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
562 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
563 (void)IoSetCancelRoutine(NextIrp
, NULL
);
564 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
566 AFD_DbgPrint(MID_TRACE
,("Satisfying\n"));
567 Status
= SatisfyPacketRecvRequest
568 ( FCB
, NextIrp
, DatagramRecv
,
569 (PUINT
)&NextIrp
->IoStatus
.Information
);
570 AFD_DbgPrint(MID_TRACE
,("Unlocking\n"));
571 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
572 if ( NextIrp
->MdlAddress
) UnlockRequest( NextIrp
, IoGetCurrentIrpStackLocation( NextIrp
) );
573 AFD_DbgPrint(MID_TRACE
,("Completing\n"));
574 (void)IoSetCancelRoutine(NextIrp
, NULL
);
575 IoCompleteRequest( NextIrp
, IO_NETWORK_INCREMENT
);
579 if( !IsListEmpty( &FCB
->DatagramList
) ) {
580 AFD_DbgPrint(MID_TRACE
,("Signalling\n"));
581 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
582 FCB
->PollStatus
[FD_READ_BIT
] = STATUS_SUCCESS
;
583 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
585 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
587 if( NT_SUCCESS(Irp
->IoStatus
.Status
) ) {
588 /* Now relaunch the datagram request */
589 Status
= TdiReceiveDatagram
590 ( &FCB
->ReceiveIrp
.InFlightRequest
,
591 FCB
->AddressFile
.Object
,
596 &FCB
->ReceiveIrp
.Iosb
,
597 PacketSocketRecvComplete
,
601 SocketStateUnlock( FCB
);
603 return STATUS_SUCCESS
;
607 AfdPacketSocketReadData(PDEVICE_OBJECT DeviceObject
, PIRP Irp
,
608 PIO_STACK_LOCATION IrpSp
) {
609 NTSTATUS Status
= STATUS_SUCCESS
;
610 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
611 PAFD_FCB FCB
= FileObject
->FsContext
;
612 PAFD_RECV_INFO_UDP RecvReq
;
613 PLIST_ENTRY ListEntry
;
614 PAFD_STORED_DATAGRAM DatagramRecv
;
616 AFD_DbgPrint(MID_TRACE
,("Called on %x\n", FCB
));
618 if( !SocketAcquireStateLock( FCB
) ) return LostSocket( Irp
);
620 /* Check that the socket is bound */
621 if( FCB
->State
!= SOCKET_STATE_BOUND
)
622 return UnlockAndMaybeComplete
623 ( FCB
, STATUS_INVALID_PARAMETER
, Irp
, 0 );
624 if( !(RecvReq
= LockRequest( Irp
, IrpSp
)) )
625 return UnlockAndMaybeComplete
626 ( FCB
, STATUS_NO_MEMORY
, Irp
, 0 );
628 AFD_DbgPrint(MID_TRACE
,("Recv flags %x\n", RecvReq
->AfdFlags
));
630 RecvReq
->BufferArray
= LockBuffers( RecvReq
->BufferArray
,
631 RecvReq
->BufferCount
,
633 RecvReq
->AddressLength
,
636 if( !RecvReq
->BufferArray
) { /* access violation in userspace */
637 return UnlockAndMaybeComplete
638 ( FCB
, STATUS_ACCESS_VIOLATION
, Irp
, 0 );
641 if( !IsListEmpty( &FCB
->DatagramList
) ) {
642 ListEntry
= RemoveHeadList( &FCB
->DatagramList
);
643 DatagramRecv
= CONTAINING_RECORD
644 ( ListEntry
, AFD_STORED_DATAGRAM
, ListEntry
);
645 if( DatagramRecv
->Len
> RecvReq
->BufferArray
[0].len
&&
646 !(RecvReq
->TdiFlags
& TDI_RECEIVE_PARTIAL
) ) {
647 InsertHeadList( &FCB
->DatagramList
,
648 &DatagramRecv
->ListEntry
);
649 Status
= Irp
->IoStatus
.Status
= STATUS_BUFFER_TOO_SMALL
;
650 Irp
->IoStatus
.Information
= DatagramRecv
->Len
;
652 if( !IsListEmpty( &FCB
->DatagramList
) ) {
653 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
654 FCB
->PollStatus
[FD_READ_BIT
] = STATUS_SUCCESS
;
655 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
657 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
659 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
661 return UnlockAndMaybeComplete
662 ( FCB
, Status
, Irp
, Irp
->IoStatus
.Information
);
664 Status
= SatisfyPacketRecvRequest
665 ( FCB
, Irp
, DatagramRecv
,
666 (PUINT
)&Irp
->IoStatus
.Information
);
668 if( !IsListEmpty( &FCB
->DatagramList
) ) {
669 FCB
->PollState
|= AFD_EVENT_RECEIVE
;
670 FCB
->PollStatus
[FD_READ_BIT
] = STATUS_SUCCESS
;
671 PollReeval( FCB
->DeviceExt
, FCB
->FileObject
);
673 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
675 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
677 return UnlockAndMaybeComplete
678 ( FCB
, Status
, Irp
, Irp
->IoStatus
.Information
);
680 } else if( RecvReq
->AfdFlags
& AFD_IMMEDIATE
) {
681 AFD_DbgPrint(MID_TRACE
,("Nonblocking\n"));
682 Status
= STATUS_CANT_WAIT
;
683 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
684 UnlockBuffers( RecvReq
->BufferArray
, RecvReq
->BufferCount
, TRUE
);
685 return UnlockAndMaybeComplete( FCB
, Status
, Irp
, 0 );
687 FCB
->PollState
&= ~AFD_EVENT_RECEIVE
;
688 return LeaveIrpUntilLater( FCB
, Irp
, FUNCTION_RECV
);