listen.c File Reference

#include "afd.h"

Include dependency graph for listen.c:

Go to the source code of this file.

Functions
static NTSTATUS	SatisfyAccept (PAFD_DEVICE_EXTENSION DeviceExt, PIRP Irp, PFILE_OBJECT NewFileObject, PAFD_TDI_OBJECT_QELT Qelt)
static NTSTATUS	SatisfyPreAccept (PIRP Irp, PAFD_TDI_OBJECT_QELT Qelt)
static NTSTATUS NTAPI	ListenComplete (PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context)
NTSTATUS	AfdListenSocket (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
NTSTATUS	AfdWaitForListen (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
NTSTATUS	AfdAccept (PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)

Variables
static IO_COMPLETION_ROUTINE	ListenComplete

Function Documentation

AfdAccept()

NTSTATUS AfdAccept	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp,
		PIO_STACK_LOCATION	IrpSp
	)

Definition at line 337 of file listen.c.

                                               {
    NTSTATUS Status = STATUS_SUCCESS;
    PFILE_OBJECT FileObject = IrpSp->FileObject;
    PAFD_DEVICE_EXTENSION DeviceExt =
        (PAFD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
    PAFD_FCB FCB = FileObject->FsContext;
    PAFD_ACCEPT_DATA AcceptData = Irp->AssociatedIrp.SystemBuffer;
    PLIST_ENTRY PendingConn;
 
    AFD_DbgPrint(MID_TRACE,("Called\n"));
 
    if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
 
    FCB->EventSelectDisabled &= ~AFD_EVENT_ACCEPT;
 
    for( PendingConn = FCB->PendingConnections.Flink;
         PendingConn != &FCB->PendingConnections;
         PendingConn = PendingConn->Flink ) {
        PAFD_TDI_OBJECT_QELT PendingConnObj =
            CONTAINING_RECORD( PendingConn, AFD_TDI_OBJECT_QELT, ListEntry );
 
        AFD_DbgPrint(MID_TRACE,("Comparing Seq %u to Q %u\n",
                                AcceptData->SequenceNumber,
                                PendingConnObj->Seq));
 
        if( PendingConnObj->Seq == AcceptData->SequenceNumber ) {
            PFILE_OBJECT NewFileObject = NULL;
 
            RemoveEntryList( PendingConn );
 
            Status = ObReferenceObjectByHandle
                ( AcceptData->ListenHandle,
                  FILE_ALL_ACCESS,
                  NULL,
                  KernelMode,
                  (PVOID *)&NewFileObject,
                  NULL );
 
            if( !NT_SUCCESS(Status) ) return UnlockAndMaybeComplete( FCB, Status, Irp, 0 );
 
            ASSERT(NewFileObject != FileObject);
            ASSERT(NewFileObject->FsContext != FCB);
 
            /* We have a pending connection ... complete this irp right away */
            Status = SatisfyAccept( DeviceExt, Irp, NewFileObject, PendingConnObj );
 
            ObDereferenceObject( NewFileObject );
 
            AFD_DbgPrint(MID_TRACE,("Completed a wait for accept\n"));
 
            ExFreePoolWithTag(PendingConnObj, TAG_AFD_ACCEPT_QUEUE);
 
            if( !IsListEmpty( &FCB->PendingConnections ) )
            {
                FCB->PollState |= AFD_EVENT_ACCEPT;
                FCB->PollStatus[FD_ACCEPT_BIT] = STATUS_SUCCESS;
                PollReeval( FCB->DeviceExt, FCB->FileObject );
            } else
                FCB->PollState &= ~AFD_EVENT_ACCEPT;
 
            SocketStateUnlock( FCB );
            return Status;
        }
    }
 
    AFD_DbgPrint(MIN_TRACE,("No connection waiting\n"));
 
    return UnlockAndMaybeComplete( FCB, STATUS_UNSUCCESSFUL, Irp, 0 );
}

Referenced by AfdDispatch().

AfdListenSocket()

NTSTATUS AfdListenSocket	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp,
		PIO_STACK_LOCATION	IrpSp
	)

Definition at line 225 of file listen.c.

                                                     {
    NTSTATUS Status = STATUS_SUCCESS;
    PFILE_OBJECT FileObject = IrpSp->FileObject;
    PAFD_FCB FCB = FileObject->FsContext;
    PAFD_LISTEN_DATA ListenReq;
 
    UNREFERENCED_PARAMETER(DeviceObject);
 
    AFD_DbgPrint(MID_TRACE,("Called on %p\n", FCB));
 
    if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
 
    if( !(ListenReq = LockRequest( Irp, IrpSp, FALSE, NULL )) )
        return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY, Irp,
                                       0 );
 
    if( FCB->State != SOCKET_STATE_BOUND ) {
        Status = STATUS_INVALID_PARAMETER;
        AFD_DbgPrint(MIN_TRACE,("Could not listen an unbound socket\n"));
        return UnlockAndMaybeComplete( FCB, Status, Irp, 0 );
    }
 
    FCB->DelayedAccept = ListenReq->UseDelayedAcceptance;
 
    AFD_DbgPrint(MID_TRACE,("ADDRESSFILE: %p\n", FCB->AddressFile.Handle));
 
    Status = WarmSocketForConnection( FCB );
 
    AFD_DbgPrint(MID_TRACE,("Status from warmsocket %x\n", Status));
 
    if( !NT_SUCCESS(Status) ) return UnlockAndMaybeComplete( FCB, Status, Irp, 0 );
 
    Status = TdiBuildNullConnectionInfo
        ( &FCB->ListenIrp.ConnectionCallInfo,
          FCB->LocalAddress->Address[0].AddressType );
 
    if (!NT_SUCCESS(Status)) return UnlockAndMaybeComplete(FCB, Status, Irp, 0);
 
    Status = TdiBuildNullConnectionInfo
        ( &FCB->ListenIrp.ConnectionReturnInfo,
          FCB->LocalAddress->Address[0].AddressType );
 
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(FCB->ListenIrp.ConnectionCallInfo,
                          TAG_AFD_TDI_CONNECTION_INFORMATION);
 
        FCB->ListenIrp.ConnectionCallInfo = NULL;
        return UnlockAndMaybeComplete(FCB, Status, Irp, 0);
    }
 
    FCB->State = SOCKET_STATE_LISTENING;
 
    Status = TdiListen( &FCB->ListenIrp.InFlightRequest,
                        FCB->Connection.Object,
                        &FCB->ListenIrp.ConnectionCallInfo,
                        &FCB->ListenIrp.ConnectionReturnInfo,
                        ListenComplete,
                        FCB );
 
    if( Status == STATUS_PENDING )
        Status = STATUS_SUCCESS;
 
    AFD_DbgPrint(MID_TRACE,("Returning %x\n", Status));
    return UnlockAndMaybeComplete( FCB, Status, Irp, 0 );
}

Referenced by AfdDispatch().

AfdWaitForListen()

NTSTATUS AfdWaitForListen	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp,
		PIO_STACK_LOCATION	IrpSp
	)

Definition at line 293 of file listen.c.

                                                      {
    PFILE_OBJECT FileObject = IrpSp->FileObject;
    PAFD_FCB FCB = FileObject->FsContext;
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(DeviceObject);
 
    AFD_DbgPrint(MID_TRACE,("Called\n"));
 
    if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
 
    if( !IsListEmpty( &FCB->PendingConnections ) ) {
        PLIST_ENTRY PendingConn = FCB->PendingConnections.Flink;
 
        /* We have a pending connection ... complete this irp right away */
        Status = SatisfyPreAccept
            ( Irp,
              CONTAINING_RECORD
              ( PendingConn, AFD_TDI_OBJECT_QELT, ListEntry ) );
 
        AFD_DbgPrint(MID_TRACE,("Completed a wait for accept\n"));
 
        if ( !IsListEmpty( &FCB->PendingConnections ) )
        {
             FCB->PollState |= AFD_EVENT_ACCEPT;
             FCB->PollStatus[FD_ACCEPT_BIT] = STATUS_SUCCESS;
             PollReeval( FCB->DeviceExt, FCB->FileObject );
        } else
             FCB->PollState &= ~AFD_EVENT_ACCEPT;
 
        SocketStateUnlock( FCB );
        return Status;
    } else if (FCB->NonBlocking) {
        AFD_DbgPrint(MIN_TRACE,("No connection ready on a non-blocking socket\n"));
 
        return UnlockAndMaybeComplete(FCB, STATUS_CANT_WAIT, Irp, 0);
    } else {
        AFD_DbgPrint(MID_TRACE,("Holding\n"));
 
        return LeaveIrpUntilLater( FCB, Irp, FUNCTION_PREACCEPT );
    }
}

Referenced by AfdDispatch().

ListenComplete()

static NTSTATUS NTAPI ListenComplete ( PDEVICE_OBJECT  DeviceObject, PIRP  Irp, PVOID  Context  )

static

Definition at line 90 of file listen.c.

                                                      {
    NTSTATUS Status = STATUS_SUCCESS;
    PAFD_FCB FCB = (PAFD_FCB)Context;
    PAFD_TDI_OBJECT_QELT Qelt;
    PLIST_ENTRY NextIrpEntry;
    PIRP NextIrp;
 
    UNREFERENCED_PARAMETER(DeviceObject);
 
    if( !SocketAcquireStateLock( FCB ) )
        return STATUS_FILE_CLOSED;
 
    ASSERT(FCB->ListenIrp.InFlightRequest == Irp);
    FCB->ListenIrp.InFlightRequest = NULL;
 
    if( FCB->State == SOCKET_STATE_CLOSED ) {
        /* Cleanup our IRP queue because the FCB is being destroyed */
        while( !IsListEmpty( &FCB->PendingIrpList[FUNCTION_PREACCEPT] ) ) {
           NextIrpEntry = RemoveHeadList(&FCB->PendingIrpList[FUNCTION_PREACCEPT]);
           NextIrp = CONTAINING_RECORD(NextIrpEntry, IRP, Tail.Overlay.ListEntry);
           NextIrp->IoStatus.Status = STATUS_FILE_CLOSED;
           NextIrp->IoStatus.Information = 0;
           if( NextIrp->MdlAddress ) UnlockRequest( NextIrp, IoGetCurrentIrpStackLocation( NextIrp ) );
           (void)IoSetCancelRoutine(NextIrp, NULL);
           IoCompleteRequest( NextIrp, IO_NETWORK_INCREMENT );
        }
 
        /* Free ConnectionReturnInfo and ConnectionCallInfo */
        if (FCB->ListenIrp.ConnectionReturnInfo)
        {
            ExFreePoolWithTag(FCB->ListenIrp.ConnectionReturnInfo,
                              TAG_AFD_TDI_CONNECTION_INFORMATION);
 
            FCB->ListenIrp.ConnectionReturnInfo = NULL;
        }
 
        if (FCB->ListenIrp.ConnectionCallInfo)
        {
            ExFreePoolWithTag(FCB->ListenIrp.ConnectionCallInfo,
                              TAG_AFD_TDI_CONNECTION_INFORMATION);
 
            FCB->ListenIrp.ConnectionCallInfo = NULL;
        }
 
        SocketStateUnlock( FCB );
        return STATUS_FILE_CLOSED;
    }
 
    AFD_DbgPrint(MID_TRACE,("Completing listen request.\n"));
    AFD_DbgPrint(MID_TRACE,("IoStatus was %x\n", Irp->IoStatus.Status));
 
    if (Irp->IoStatus.Status != STATUS_SUCCESS)
    {
        SocketStateUnlock(FCB);
        return Irp->IoStatus.Status;
    }
 
    Qelt = ExAllocatePoolWithTag(NonPagedPool,
                                 sizeof(*Qelt),
                                 TAG_AFD_ACCEPT_QUEUE);
 
    if( !Qelt ) {
        Status = STATUS_NO_MEMORY;
    } else {
        UINT AddressType =
            FCB->LocalAddress->Address[0].AddressType;
 
        Qelt->Object = FCB->Connection;
        Qelt->Seq = FCB->ConnSeq++;
        AFD_DbgPrint(MID_TRACE,("Address Type: %u (RA %p)\n",
                                AddressType,
                                FCB->ListenIrp.
                                ConnectionReturnInfo->RemoteAddress));
 
        Status = TdiBuildNullConnectionInfo( &Qelt->ConnInfo, AddressType );
        if( NT_SUCCESS(Status) ) {
            TaCopyTransportAddressInPlace
               ( Qelt->ConnInfo->RemoteAddress,
                 FCB->ListenIrp.ConnectionReturnInfo->RemoteAddress );
            InsertTailList( &FCB->PendingConnections, &Qelt->ListEntry );
        }
    }
 
    /* Satisfy a pre-accept request if one is available */
    if( !IsListEmpty( &FCB->PendingIrpList[FUNCTION_PREACCEPT] ) &&
        !IsListEmpty( &FCB->PendingConnections ) ) {
        PLIST_ENTRY PendingIrp  =
            RemoveHeadList( &FCB->PendingIrpList[FUNCTION_PREACCEPT] );
        PLIST_ENTRY PendingConn = FCB->PendingConnections.Flink;
        SatisfyPreAccept
            ( CONTAINING_RECORD( PendingIrp, IRP,
                                 Tail.Overlay.ListEntry ),
              CONTAINING_RECORD( PendingConn, AFD_TDI_OBJECT_QELT,
                                 ListEntry ) );
    }
 
    /* Launch new accept socket */
    Status = WarmSocketForConnection( FCB );
 
    if (NT_SUCCESS(Status))
    {
        Status = TdiBuildNullConnectionInfoInPlace(FCB->ListenIrp.ConnectionCallInfo,
                                                   FCB->LocalAddress->Address[0].AddressType);
        ASSERT(Status == STATUS_SUCCESS);
 
        Status = TdiBuildNullConnectionInfoInPlace(FCB->ListenIrp.ConnectionReturnInfo,
                                                   FCB->LocalAddress->Address[0].AddressType);
        ASSERT(Status == STATUS_SUCCESS);
 
        Status = TdiListen( &FCB->ListenIrp.InFlightRequest,
                            FCB->Connection.Object,
                            &FCB->ListenIrp.ConnectionCallInfo,
                            &FCB->ListenIrp.ConnectionReturnInfo,
                            ListenComplete,
                            FCB );
 
        if (Status == STATUS_PENDING)
            Status = STATUS_SUCCESS;
    }
 
    /* Trigger a select return if appropriate */
    if( !IsListEmpty( &FCB->PendingConnections ) ) {
        FCB->PollState |= AFD_EVENT_ACCEPT;
        FCB->PollStatus[FD_ACCEPT_BIT] = STATUS_SUCCESS;
        PollReeval( FCB->DeviceExt, FCB->FileObject );
    } else
        FCB->PollState &= ~AFD_EVENT_ACCEPT;
 
    SocketStateUnlock( FCB );
 
    return Status;
}

SatisfyAccept()

static NTSTATUS SatisfyAccept ( PAFD_DEVICE_EXTENSION  DeviceExt, PIRP  Irp, PFILE_OBJECT  NewFileObject, PAFD_TDI_OBJECT_QELT  Qelt  )

static

Definition at line 13 of file listen.c.

                                                           {
    PAFD_FCB FCB = NewFileObject->FsContext;
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(DeviceExt);
 
    if( !SocketAcquireStateLock( FCB ) )
        return LostSocket( Irp );
 
    /* Transfer the connection to the new socket, launch the opening read */
    AFD_DbgPrint(MID_TRACE,("Completing a real accept (FCB %p)\n", FCB));
 
    FCB->Connection = Qelt->Object;
 
    if (FCB->RemoteAddress)
    {
        ExFreePoolWithTag(FCB->RemoteAddress, TAG_AFD_TRANSPORT_ADDRESS);
    }
 
    FCB->RemoteAddress =
        TaCopyTransportAddress( Qelt->ConnInfo->RemoteAddress );
 
    if( !FCB->RemoteAddress )
        Status = STATUS_NO_MEMORY;
    else
        Status = MakeSocketIntoConnection( FCB );
 
    if (NT_SUCCESS(Status))
        Status = TdiBuildConnectionInfo(&FCB->ConnectCallInfo, FCB->RemoteAddress);
 
    if (NT_SUCCESS(Status))
        Status = TdiBuildConnectionInfo(&FCB->ConnectReturnInfo, FCB->RemoteAddress);
 
    return UnlockAndMaybeComplete( FCB, Status, Irp, 0 );
}

Referenced by AfdAccept().

SatisfyPreAccept()

static NTSTATUS SatisfyPreAccept ( PIRP  Irp, PAFD_TDI_OBJECT_QELT  Qelt  )

static

Definition at line 52 of file listen.c.

                                                                        {
    PAFD_RECEIVED_ACCEPT_DATA ListenReceive =
        (PAFD_RECEIVED_ACCEPT_DATA)Irp->AssociatedIrp.SystemBuffer;
    PTA_IP_ADDRESS IPAddr;
 
    ListenReceive->SequenceNumber = Qelt->Seq;
 
    AFD_DbgPrint(MID_TRACE,("Giving SEQ %u to userland\n", Qelt->Seq));
    AFD_DbgPrint(MID_TRACE,("Socket Address (K) %p (U) %p\n",
                            &ListenReceive->Address,
                            Qelt->ConnInfo->RemoteAddress));
 
    TaCopyTransportAddressInPlace( &ListenReceive->Address,
                                   Qelt->ConnInfo->RemoteAddress );
 
    IPAddr = (PTA_IP_ADDRESS)&ListenReceive->Address;
 
    AFD_DbgPrint(MID_TRACE,("IPAddr->TAAddressCount %d\n",
                            IPAddr->TAAddressCount));
    AFD_DbgPrint(MID_TRACE,("IPAddr->Address[0].AddressType %u\n",
                            IPAddr->Address[0].AddressType));
    AFD_DbgPrint(MID_TRACE,("IPAddr->Address[0].AddressLength %u\n",
                            IPAddr->Address[0].AddressLength));
    AFD_DbgPrint(MID_TRACE,("IPAddr->Address[0].Address[0].sin_port %x\n",
                            IPAddr->Address[0].Address[0].sin_port));
    AFD_DbgPrint(MID_TRACE,("IPAddr->Address[0].Address[0].sin_addr %x\n",
                            IPAddr->Address[0].Address[0].in_addr));
 
    if( Irp->MdlAddress ) UnlockRequest( Irp, IoGetCurrentIrpStackLocation( Irp ) );
 
    Irp->IoStatus.Information = ((PCHAR)&IPAddr[1]) - ((PCHAR)ListenReceive);
    Irp->IoStatus.Status = STATUS_SUCCESS;
    (void)IoSetCancelRoutine(Irp, NULL);
    IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
    return STATUS_SUCCESS;
}

Referenced by AfdWaitForListen(), and ListenComplete().

Variable Documentation

ListenComplete

IO_COMPLETION_ROUTINE ListenComplete

static

Definition at line 89 of file listen.c.

Referenced by AfdListenSocket(), and ListenComplete().