ReactOS  0.4.15-dev-2526-g0fb3c1e
context.c
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1 /*
2  * COPYRIGHT: See COPYING in the top level directory
3  * PROJECT: ReactOS kernel
4  * FILE: drivers/net/afd/afd/context.c
5  * PURPOSE: Ancillary functions driver
6  * PROGRAMMER: Art Yerkes (ayerkes@speakeasy.net)
7  * UPDATE HISTORY:
8  * 20040708 Created
9  */
10 
11 #include "afd.h"
12 
18  PAFD_FCB FCB = FileObject->FsContext;
19  UINT ContextSize = IrpSp->Parameters.DeviceIoControl.OutputBufferLength;
20 
22 
23  if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
24 
25  if( FCB->ContextSize < ContextSize ) ContextSize = FCB->ContextSize;
26 
27  if( FCB->Context ) {
28  RtlCopyMemory( Irp->UserBuffer,
29  FCB->Context,
30  ContextSize );
32  }
33 
34  AFD_DbgPrint(MID_TRACE,("Returning %x\n", Status));
35 
37 }
38 
42 {
44  PAFD_FCB FCB = FileObject->FsContext;
45 
47 
48  if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
49 
50  if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
51  {
52  AFD_DbgPrint(MIN_TRACE,("Buffer too small\n"));
54  }
55 
56  RtlCopyMemory(Irp->UserBuffer,
57  &FCB->ContextSize,
58  sizeof(ULONG));
59 
61 }
62 
67  PAFD_FCB FCB = FileObject->FsContext;
69 
71 
72  if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
73 
74  if (!Context)
76 
77  if( FCB->Context ) {
79  FCB->ContextSize = 0;
80  }
81 
83  IrpSp->Parameters.DeviceIoControl.InputBufferLength,
85 
86  if( !FCB->Context ) return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY, Irp, 0 );
87 
88  FCB->ContextSize = IrpSp->Parameters.DeviceIoControl.InputBufferLength;
89 
90  RtlCopyMemory( FCB->Context,
91  Context,
92  FCB->ContextSize );
93 
95 }
#define MID_TRACE
Definition: debug.h:15
#define UNREFERENCED_PARAMETER(P)
Definition: ntbasedef.h:317
Definition: cdstruc.h:902
#define STATUS_INVALID_PARAMETER
Definition: udferr_usr.h:135
PVOID LockRequest(PIRP Irp, PIO_STACK_LOCATION IrpSp, BOOLEAN Output, KPROCESSOR_MODE *LockMode)
Definition: lock.c:24
LONG NTSTATUS
Definition: precomp.h:26
BOOLEAN SocketAcquireStateLock(PAFD_FCB FCB)
Definition: lock.c:360
_Must_inspect_result_ _In_ FLT_CONTEXT_TYPE _In_ SIZE_T ContextSize
Definition: fltkernel.h:1444
NTSTATUS NTAPI UnlockAndMaybeComplete(PAFD_FCB FCB, NTSTATUS Status, PIRP Irp, UINT Information)
Definition: lock.c:375
#define STATUS_BUFFER_TOO_SMALL
Definition: shellext.h:69
NTSTATUS NTAPI AfdSetContext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
Definition: context.c:64
_In_ PDEVICE_OBJECT DeviceObject
Definition: wdfdevice.h:2055
NTSTATUS(* NTAPI)(IN PFILE_FULL_EA_INFORMATION EaBuffer, IN ULONG EaLength, OUT PULONG ErrorOffset)
Definition: IoEaTest.cpp:117
#define FALSE
Definition: types.h:117
_In_ PIRP Irp
Definition: csq.h:116
#define AFD_DbgPrint(_t_, _x_)
Definition: debug.h:60
_In_ WDFREQUEST _In_ WDFFILEOBJECT FileObject
Definition: wdfdevice.h:547
Definition: afd.h:161
Status
Definition: gdiplustypes.h:24
* PFILE_OBJECT
Definition: iotypes.h:1998
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
PFILE_OBJECT FileObject
Definition: iotypes.h:3168
NTSTATUS NTAPI AfdGetContext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
Definition: context.c:14
NTSTATUS LostSocket(PIRP Irp)
Definition: lock.c:387
_In_ PIO_STACK_LOCATION IrpSp
Definition: create.c:4137
#define STATUS_NO_MEMORY
Definition: ntstatus.h:260
unsigned int UINT
Definition: ndis.h:50
#define NULL
Definition: types.h:112
NTSTATUS NTAPI AfdGetContextSize(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
Definition: context.c:40
unsigned int ULONG
Definition: retypes.h:1
#define MIN_TRACE
Definition: debug.h:14
#define RtlCopyMemory(Destination, Source, Length)
Definition: typedefs.h:263
#define STATUS_SUCCESS
Definition: shellext.h:65
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
struct _NAMED_PIPE_CREATE_PARAMETERS * Parameters
Definition: iotypes.h:3127
#define TAG_AFD_SOCKET_CONTEXT
Definition: afd.h:40