140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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mailslot.c
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Abstract:
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This module implements the support routines needed for mailslots in the NT
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Lan Manager redirector
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Author:
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Larry Osterman (LarryO) 08-Aug-1991
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Revision History:
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08-Aug-1991 LarryO
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Created
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--*/
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#define INCLUDE_SMB_TRANSACTION
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#include "precomp.h"
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#pragma hdrstop
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, RdrMailslotWrite)
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#endif
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NTSTATUS
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RdrMailslotWrite (
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IN BOOLEAN Wait,
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IN BOOLEAN InFsd,
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IN PICB Icb,
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IN PIRP Irp,
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OUT PBOOLEAN PostToFsp
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)
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/*++
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Routine Description:
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This routine processes the NtWriteFile API for a remote mailslot.
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Arguments:
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IN BOOLEAN Wait - True iff we can wait for this request.
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IN PICB Icb - Supplies the ICB for the write request.
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IN PIRP Irp - Supplies a pointer to the IRP to be processed.
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OUT PBOOLEAN PostToFsp - True if we are to process this request in the FSP
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Return Value:
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NTSTATUS - The FSD status for this Irp.
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--*/
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{
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USHORT Setup[3];
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USHORT Params[2];
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UNICODE_STRING MailslotName = Icb->Fcb->FileName;
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UNICODE_STRING ServerName;
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PVOID DataBuffer;
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NTSTATUS Status;
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ULONG Disposition = FILE_OPEN_IF;
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PCONNECTLISTENTRY Connection;
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CLONG OutParameterCount = 2;
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CLONG OutSetupCount = 0;
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CLONG OutDataCount = 0;
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PSECURITY_ENTRY ConnectedSe = NULL;
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
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PAGED_CODE();
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if (!Wait) {
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*PostToFsp = TRUE;
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return STATUS_PENDING;
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}
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RdrReferenceDiscardableCode(RdrVCDiscardableSection);
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Connection = Icb->Fcb->Connection;
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RdrExtractNextComponentName(&ServerName, &Icb->Fcb->FileName);
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MailslotName.Length -= (ServerName.Length+sizeof(WCHAR));
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MailslotName.MaximumLength -= (ServerName.MaximumLength + sizeof(WCHAR));
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MailslotName.Buffer += (ServerName.Length/sizeof(WCHAR)) + 1;
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try {
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RdrMapUsersBuffer(Irp, &DataBuffer, IrpSp->Parameters.Write.Length);
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} except (EXCEPTION_EXECUTE_HANDLER) {
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RdrDereferenceDiscardableCode(RdrVCDiscardableSection);
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return GetExceptionCode();
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}
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Setup[0] = TRANS_MAILSLOT_WRITE;// Command
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Setup[1] = 0; // Priority of write
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Setup[2] = 2; // Unreliable request.
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//
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// Please note that even though we will never get a response
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// to this request, the SMB protocol for mailslot writes specifies
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// that there be two receive parameters specified in the SMB. Don't ask.
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//
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Status = RdrTransact(Irp, Connection, Icb->Se,
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Setup, sizeof(Setup), &OutSetupCount, // Setup words
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&MailslotName, // Name
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Params, 0, &OutParameterCount, // Parameters
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DataBuffer, IrpSp->Parameters.Write.Length, // In data
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NULL, &OutDataCount, // Out data
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NULL, 0xffffffff, SMB_TRANSACTION_NO_RESPONSE, 0,
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NULL, NULL);
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//
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// If we were able to send the data, then it all made it.
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//
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if (NT_SUCCESS(Status)) {
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Irp->IoStatus.Information = IrpSp->Parameters.Write.Length;
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}
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RdrDereferenceDiscardableCode(RdrVCDiscardableSection);
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return Status;
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}
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