event.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS Ancillary Function Driver
 * FILE:        afd/event.c
 * PURPOSE:     TDI event handlers
 * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
 * REVISIONS:
 *   CSH 01/09-2000 Created
 */
#include <afd.h>

NTSTATUS AfdEventError(
    IN PVOID TdiEventContext,
    IN NTSTATUS Status)
{
    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    return STATUS_SUCCESS;
}


NTSTATUS AfdEventDisconnect(
    IN PVOID TdiEventContext,
    IN CONNECTION_CONTEXT ConnectionContext,
    IN LONG DisconnectDataLength,
    IN PVOID DisconnectData,
    IN LONG DisconnectInformationLength,
    IN PVOID DisconnectInformation,
    IN ULONG DisconnectFlags)
{
    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    return STATUS_SUCCESS;
}


NTSTATUS AfdEventReceive(
    IN PVOID TdiEventContext,
    IN CONNECTION_CONTEXT ConnectionContext,
    IN ULONG ReceiveFlags,
    IN ULONG BytesIndicated,
    IN ULONG BytesAvailable,
    OUT ULONG *BytesTaken,
    IN PVOID Tsdu,
    OUT PIRP *IoRequestPacket)
{
    PAFDFCB FCB = (PAFDFCB)TdiEventContext;
    PVOID ReceiveBuffer;
    PAFD_BUFFER Buffer;
    KIRQL OldIrql;

    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    AFD_DbgPrint(MID_TRACE, ("Receiving (%d) bytes on socket\n",
                             BytesAvailable));

    ReceiveBuffer = ExAllocatePool(NonPagedPool, BytesAvailable);
    if (!ReceiveBuffer)
        return STATUS_INSUFFICIENT_RESOURCES;

    /*Buffer = (PAFD_BUFFER)ExAllocateFromNPagedLookasideList(
      &BufferLookasideList);*/
    Buffer = (PAFD_BUFFER)ExAllocatePool(NonPagedPool, sizeof(AFD_BUFFER));
    if (!Buffer) {
        ExFreePool(ReceiveBuffer);
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    /* Copy the data to a local buffer */
    RtlCopyMemory(ReceiveBuffer, Tsdu, BytesAvailable);

    Buffer->Buffer.len = BytesAvailable;
    Buffer->Buffer.buf = ReceiveBuffer;
    Buffer->Offset = 0;

    KeAcquireSpinLock(&FCB->ReceiveQueueLock, &OldIrql);

    InsertTailList( &FCB->ReceiveQueue, &Buffer->ListEntry );

    TryToSatisfyRecvRequest( FCB, TRUE );

    KeReleaseSpinLock(&FCB->ReceiveQueueLock, OldIrql);

    *BytesTaken = BytesAvailable;

    AFD_DbgPrint(MAX_TRACE, ("Leaving.\n"));

    return STATUS_SUCCESS;
}


TDI_STATUS ClientEventReceiveExpedited(
    IN PVOID TdiEventContext,
    IN CONNECTION_CONTEXT ConnectionContext,
    IN ULONG ReceiveFlags,
    IN ULONG BytesIndicated,
    IN ULONG BytesAvailable,
    OUT ULONG *BytesTaken,
    IN PVOID Tsdu,
    OUT PIRP *IoRequestPacket)
{
    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    return STATUS_SUCCESS;
}


NTSTATUS ClientEventChainedReceive(
    IN PVOID TdiEventContext,
    IN CONNECTION_CONTEXT ConnectionContext,
    IN ULONG ReceiveFlags,
    IN ULONG ReceiveLength,
    IN ULONG StartingOffset,
    IN PMDL Tsdu,
    IN PVOID TsduDescriptor)
{
    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    return STATUS_SUCCESS;
}


NTSTATUS AfdEventReceiveDatagramHandler(
    IN PVOID TdiEventContext,
    IN LONG SourceAddressLength,
    IN PVOID SourceAddress,
    IN LONG OptionsLength,
    IN PVOID Options,
    IN ULONG ReceiveDatagramFlags,
    IN ULONG BytesIndicated,
    IN ULONG BytesAvailable,
    OUT ULONG *BytesTaken,
    IN PVOID Tsdu,
    OUT PIRP *IoRequestPacket)
{
    PAFDFCB FCB = (PAFDFCB)TdiEventContext;
    PAFD_READ_REQUEST ReadRequest;
    PVOID ReceiveBuffer;
    PAFD_BUFFER Buffer;
    PLIST_ENTRY Entry;
    NTSTATUS Status;
    KIRQL OldIrql;
    ULONG Count;
    BOOLEAN CompleteIrp;

    AFD_DbgPrint(MAX_TRACE, ("Called.\n"));

    AFD_DbgPrint(MID_TRACE, ("Receiving (%d) bytes from (0x%X).\n",
                             BytesAvailable, *(PULONG)SourceAddress));

    ReceiveBuffer = ExAllocatePool(NonPagedPool, BytesAvailable);
    if (!ReceiveBuffer)
        return STATUS_INSUFFICIENT_RESOURCES;

    /*Buffer = (PAFD_BUFFER)ExAllocateFromNPagedLookasideList(
      &BufferLookasideList);*/
    Buffer = (PAFD_BUFFER)ExAllocatePool(NonPagedPool, sizeof(AFD_BUFFER));
    if (!Buffer) {
        ExFreePool(ReceiveBuffer);
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    /* Copy the data to a local buffer */
    RtlCopyMemory(ReceiveBuffer, Tsdu, BytesAvailable);

    Buffer->Buffer.len = BytesAvailable;
    Buffer->Buffer.buf = ReceiveBuffer;
    Buffer->Offset = 0;

    ExInterlockedInsertTailList(&FCB->ReceiveQueue,
                                &Buffer->ListEntry,
                                &FCB->ReceiveQueueLock);

    KeAcquireSpinLock(&FCB->ReceiveQueueLock, &OldIrql);

    if (CompleteIrp = !IsListEmpty(&FCB->ReadRequestQueue)) {
        AFD_DbgPrint(MAX_TRACE, ("Satisfying read request.\n"));

        Entry = RemoveHeadList(&FCB->ReceiveQueue);
        ReadRequest = CONTAINING_RECORD(Entry, AFD_READ_REQUEST, ListEntry);

        Status = FillWSABuffers(FCB,
                                ReadRequest->RecvFromRequest->Buffers,
                                ReadRequest->RecvFromRequest->BufferCount,
                                &Count,
                                FALSE); /* Packet oriented */
        ReadRequest->RecvFromReply->NumberOfBytesRecvd = Count;
        ReadRequest->RecvFromReply->Status = NO_ERROR;

        ReadRequest->Irp->IoStatus.Information = 0;
        ReadRequest->Irp->IoStatus.Status = Status;
    }

    KeReleaseSpinLock(&FCB->ReceiveQueueLock, OldIrql);

    if (CompleteIrp) {
        AFD_DbgPrint(MAX_TRACE, ("Completing IRP at (0x%X).\n", ReadRequest->Irp));
        IoCompleteRequest(ReadRequest->Irp, IO_NETWORK_INCREMENT);
        *BytesTaken = BytesAvailable;
    }

    AFD_DbgPrint(MAX_TRACE, ("Leaving.\n"));

    return STATUS_SUCCESS;
}


NTSTATUS AfdRegisterEventHandlers(
    PAFDFCB FCB)
{
    NTSTATUS Status;

    assert(FCB->TdiAddressObject);

    /* Report errors for all types of sockets */
    Status = TdiSetEventHandler(FCB->TdiAddressObject,
        TDI_EVENT_ERROR,
        (PVOID)AfdEventError,
        (PVOID)FCB);
    if (!NT_SUCCESS(Status)) { return Status; }

    switch (FCB->SocketType) {
    case SOCK_STREAM:
        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_DISCONNECT,
            (PVOID)AfdEventDisconnect,
            (PVOID)FCB);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE,
            (PVOID)AfdEventReceive,
            (PVOID)FCB);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE_EXPEDITED,
            (PVOID)ClientEventReceiveExpedited,
            (PVOID)FCB);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_CHAINED_RECEIVE,
            (PVOID)ClientEventChainedReceive,
            (PVOID)FCB);
        if (!NT_SUCCESS(Status)) { return Status; }
        break;

    case SOCK_DGRAM:
    case SOCK_RAW:
        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE_DATAGRAM,
            (PVOID)AfdEventReceiveDatagramHandler,
            (PVOID)FCB);
        if (!NT_SUCCESS(Status)) { return Status; }
    }
    return STATUS_SUCCESS;
}


NTSTATUS AfdDeregisterEventHandlers(
    PAFDFCB FCB)
{
    NTSTATUS Status;

    Status = TdiSetEventHandler(FCB->TdiAddressObject,
        TDI_EVENT_ERROR,
        NULL,
        NULL);
    if (!NT_SUCCESS(Status)) { return Status; }

    switch (FCB->SocketType) {
    case SOCK_STREAM:
        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_DISCONNECT,
            NULL,
            NULL);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE,
            NULL,
            NULL);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE_EXPEDITED,
            NULL,
            NULL);
        if (!NT_SUCCESS(Status)) { return Status; }

        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_CHAINED_RECEIVE,
            NULL,
            NULL);
        if (!NT_SUCCESS(Status)) { return Status; }
        break;

    case SOCK_DGRAM:
    case SOCK_RAW:
        Status = TdiSetEventHandler(FCB->TdiAddressObject,
            TDI_EVENT_RECEIVE_DATAGRAM,
            NULL,
            NULL);
        if (!NT_SUCCESS(Status)) { return Status; }
    }
    return STATUS_SUCCESS;
}


/* EOF */