ReactOS 0.4.15-dev-7918-g2a2556c
context.c File Reference
#include "afd.h"
Include dependency graph for context.c:

Go to the source code of this file.

Functions

NTSTATUS NTAPI AfdGetContext (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 
NTSTATUS NTAPI AfdGetContextSize (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 
NTSTATUS NTAPI AfdSetContext (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 

Function Documentation

◆ AfdGetContext()

NTSTATUS NTAPI AfdGetContext ( PDEVICE_OBJECT  DeviceObject,
PIRP  Irp,
PIO_STACK_LOCATION  IrpSp 
)

Definition at line 14 of file context.c.

15 {
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,
32 }
33
34 AFD_DbgPrint(MID_TRACE,("Returning %x\n", Status));
35
37}
LONG NTSTATUS
Definition: precomp.h:26
#define MID_TRACE
Definition: debug.h:15
_In_ PIRP Irp
Definition: csq.h:116
_In_ PIO_STACK_LOCATION IrpSp
Definition: create.c:4137
NTSTATUS LostSocket(PIRP Irp)
Definition: lock.c:387
NTSTATUS NTAPI UnlockAndMaybeComplete(PAFD_FCB FCB, NTSTATUS Status, PIRP Irp, UINT Information)
Definition: lock.c:375
BOOLEAN SocketAcquireStateLock(PAFD_FCB FCB)
Definition: lock.c:360
#define AFD_DbgPrint(_t_, _x_)
Definition: debug.h:60
_Must_inspect_result_ _In_ FLT_CONTEXT_TYPE _In_ SIZE_T ContextSize
Definition: fltkernel.h:1444
Status
Definition: gdiplustypes.h:25
unsigned int UINT
Definition: ndis.h:50
#define UNREFERENCED_PARAMETER(P)
Definition: ntbasedef.h:317
#define STATUS_SUCCESS
Definition: shellext.h:65
Definition: afd.h:159
Definition: cdstruc.h:902
struct _IO_STACK_LOCATION::@1564::@1565 DeviceIoControl
PFILE_OBJECT FileObject
Definition: iotypes.h:3169
union _IO_STACK_LOCATION::@1564 Parameters
#define RtlCopyMemory(Destination, Source, Length)
Definition: typedefs.h:263
#define STATUS_INVALID_PARAMETER
Definition: udferr_usr.h:135
_In_ PDEVICE_OBJECT DeviceObject
Definition: wdfdevice.h:2055
_In_ WDFREQUEST _In_ WDFFILEOBJECT FileObject
Definition: wdfdevice.h:550
* PFILE_OBJECT
Definition: iotypes.h:1998

Referenced by AfdDispatch().

◆ AfdGetContextSize()

NTSTATUS NTAPI AfdGetContextSize ( PDEVICE_OBJECT  DeviceObject,
PIRP  Irp,
PIO_STACK_LOCATION  IrpSp 
)

Definition at line 40 of file context.c.

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}
#define MIN_TRACE
Definition: debug.h:14
#define STATUS_BUFFER_TOO_SMALL
Definition: shellext.h:69
uint32_t ULONG
Definition: typedefs.h:59

Referenced by AfdDispatch().

◆ AfdSetContext()

NTSTATUS NTAPI AfdSetContext ( PDEVICE_OBJECT  DeviceObject,
PIRP  Irp,
PIO_STACK_LOCATION  IrpSp 
)

Definition at line 64 of file context.c.

65 {
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 TAG_AFD_SOCKET_CONTEXT
Definition: afd.h:40
#define NULL
Definition: types.h:112
#define FALSE
Definition: types.h:117
PVOID LockRequest(PIRP Irp, PIO_STACK_LOCATION IrpSp, BOOLEAN Output, KPROCESSOR_MODE *LockMode)
Definition: lock.c:24
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
#define PagedPool
Definition: env_spec_w32.h:308
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1109
#define STATUS_NO_MEMORY
Definition: ntstatus.h:260

Referenced by AfdDispatch().