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194 lines
3.8 KiB
194 lines
3.8 KiB
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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_write.c
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Abstract:
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This is the main file for the AsyncMAC Driver for the Remote Access
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Service. This driver conforms to the NDIS 3.0 interface.
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Author:
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Thomas J. Dimitri (TommyD) 08-May-1992
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Environment:
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Kernel Mode - Or whatever is the equivalent on OS/2 and DOS.
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Revision History:
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Ray Patch (raypa) 04/13/94 Modified for new WAN wrapper.
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--*/
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#define RAISEIRQL
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#include "asyncall.h"
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#if DBG
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ULONG UlFramesOut = 0;
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#endif
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// asyncmac.c will define the global parameters.
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ULONG GlobalXmitCameBack = 0;
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ULONG GlobalXmitCameBack2 = 0;
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ULONG GlobalXmitCameBack3 = 0;
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//
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// The assemble frame routine is specific for RAS 1.0 and 2.0
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// frame formats. It uses a 16 byte CRC at the end.
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//
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VOID
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AsyncFrameRASXonXoff(
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PUCHAR pStartOfFrame,
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postamble *pPostamble,
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PASYNC_FRAME pFrame,
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UCHAR controlCastByte);
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VOID
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AsyncFrameRASNormal(
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PUCHAR pStartOfFrame,
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postamble *pPostamble,
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PASYNC_FRAME pFrame,
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UCHAR controlCastByte);
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NTSTATUS
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AsyncWriteCompletionRoutine(
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IN PDEVICE_OBJECT DeviceObject, //... Our device object.
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IN PIRP Irp, //... I/O request packet.
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IN PNDIS_WAN_PACKET WanPacket //... Completion context.
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)
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/*++
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This is the IO Completion routine for WriteFrame.
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It is called when an I/O Write request has completed.
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--*/
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{
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NTSTATUS Status;
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NTSTATUS PacketStatus;
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PASYNC_INFO AsyncInfo;
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//
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// Make the compiler happy.
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//
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UNREFERENCED_PARAMETER(DeviceObject);
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//
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// Initialize locals.
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//
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AsyncInfo = WanPacket->MacReserved1;
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PacketStatus = NDIS_STATUS_FAILURE;
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Status = Irp->IoStatus.Status;
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//
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// Free the irp used to send the packt to the serial driver
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//
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IoFreeIrp(Irp);
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//
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// What was the outcome of the IRP.
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//
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switch ( Status ) {
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case STATUS_SUCCESS:
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PacketStatus = NDIS_STATUS_SUCCESS;
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break;
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case STATUS_TIMEOUT:
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DbgTracef(-2,("ASYNC: Status TIMEOUT on write\n"));
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break;
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case STATUS_CANCELLED:
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DbgTracef(-2,("ASYNC: Status CANCELLED on write\n"));
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break;
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case STATUS_PENDING:
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DbgTracef(0,("ASYNC: Status PENDING on write\n"));
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break;
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default:
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DbgTracef(-2,("ASYNC: Unknown status 0x%.8x on write", Status));
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break;
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}
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//
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// Count this packet completion.
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//
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AsyncInfo->Out++;
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//
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// Tell the Wrapper that we have finally the packet has been sent
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//
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NdisMWanSendComplete(
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AsyncInfo->Adapter->MiniportHandle,
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WanPacket,
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PacketStatus);
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//
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// We return STATUS_MORE_PROCESSING_REQUIRED so that the
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// IoCompletionRoutine will stop working on the IRP.
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//
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return STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS
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AsyncGetFrameFromPool(
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IN PASYNC_INFO Info,
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OUT PASYNC_FRAME *NewFrame )
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/*++
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--*/
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{
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PASYNC_ADAPTER Adapter=Info->Adapter;
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PASYNC_FRAME pFrame;
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pFrame = (ASYNC_FRAME*)
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ExAllocateFromNPagedLookasideList(&Adapter->AsyncFrameList);
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if (pFrame == NULL) {
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*NewFrame = NULL;
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return NDIS_STATUS_RESOURCES;
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}
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//
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// increase by 16 for frame runover padding when we have to resync
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//
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pFrame->Frame =
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(PUCHAR)pFrame + sizeof(ASYNC_FRAME) + sizeof(PVOID);
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(ULONG_PTR)pFrame->Frame &= ~((ULONG_PTR)(sizeof(PVOID)-1));
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pFrame->FrameLength = Adapter->MaxFrameSize;
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// assign back ptr from frame to adapter
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pFrame->Adapter=Adapter;
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// setup another back ptr
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pFrame->Info=Info;
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*NewFrame = pFrame;
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return(NDIS_STATUS_SUCCESS);
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}
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