透過Connection-Oriented通訊端傳送資料

在 Winsock 核心 (WSK) 應用程式將連線導向通訊端連線到遠端傳輸位址之後，就可以透過通訊端傳送資料。 WSK 應用程式也可以透過接聽通訊端上接受的連接導向通訊端傳送資料。 WSK 應用程式會呼叫 WskSend 函式，透過連線導向通訊端傳送資料。

下列程式碼範例示範 WSK 應用程式如何透過連線導向通訊端傳送資料。

// Prototype for the send IoCompletion routine
NTSTATUS
  SendComplete(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp,
    PVOID Context
    );

// Function to send data
NTSTATUS
  SendData(
    PWSK_SOCKET Socket,
    PWSK_BUF DataBuffer
    )
{
  PWSK_PROVIDER_CONNECTION_DISPATCH Dispatch;
  PIRP Irp;
  NTSTATUS Status;

  // Get pointer to the provider dispatch structure
  Dispatch =
    (PWSK_PROVIDER_CONNECTION_DISPATCH)(Socket->Dispatch);

  // Allocate an IRP
  Irp =
    IoAllocateIrp(
      1,
      FALSE
      );

  // Check result
  if (!Irp)
  {
    // Return error
    return STATUS_INSUFFICIENT_RESOURCES;
  }

  // Set the completion routine for the IRP
  IoSetCompletionRoutine(
    Irp,
    SendComplete,
    DataBuffer,  // Use the data buffer for the context
    TRUE,
    TRUE,
    TRUE
    );

  // Initiate the send operation on the socket
  Status =
    Dispatch->WskSend(
      Socket,
      DataBuffer,
      0,  // No flags
      Irp
      );

  // Return the status of the call to WskSend()
  return Status;
}

// Send IoCompletion routine
NTSTATUS
  SendComplete(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp,
    PVOID Context
    )
{
  UNREFERENCED_PARAMETER(DeviceObject);

  PWSK_BUF DataBuffer;
  ULONG ByteCount;

  // Check the result of the send operation
  if (Irp->IoStatus.Status == STATUS_SUCCESS)
  {
    // Get the pointer to the data buffer
    DataBuffer = (PWSK_BUF)Context;

    // Get the number of bytes sent
    ByteCount = (ULONG)(Irp->IoStatus.Information);

    // Re-use or free the data buffer
    ...
  }

  // Error status
  else
  {
    // Handle error
    ...
  }

  // Free the IRP
  IoFreeIrp(Irp);

  // Always return STATUS_MORE_PROCESSING_REQUIRED to
  // terminate the completion processing of the IRP.
  return STATUS_MORE_PROCESSING_REQUIRED;
}