/// <summary>
/// Expect a DVC Create Response PDU
/// </summary>
/// <param name="timeout">Timeout</param>
/// <param name="channelId">Channel Id</param>
/// <param name="transportType">Transport type</param>
/// <returns></returns>
private CreateRespDvcPdu ExpectDVCCreateResponsePDU(TimeSpan timeout, uint channelId, DynamicVC_TransportType transportType)
{
DateTime endTime = DateTime.Now + timeout;
while (DateTime.Now < endTime)
{
if (unprocessedDVCPacketBuffer.Count > 0)
{
lock (unprocessedDVCPacketBuffer)
{
for (int i = 0; i < unprocessedDVCPacketBuffer.Count; i++)
{
if (transportType == unprocessedDVCPacketBuffer[i].TransportType &&
unprocessedDVCPacketBuffer[i].PDU is CreateRespDvcPdu &&
(unprocessedDVCPacketBuffer[i].PDU as CreateRespDvcPdu).ChannelId == channelId)
{
CreateRespDvcPdu pdu = unprocessedDVCPacketBuffer[i].PDU as CreateRespDvcPdu;
unprocessedDVCPacketBuffer.RemoveAt(i);
return(pdu);
}
}
}
}
Thread.Sleep(this.waitInterval);
}
return(null);
}
/// <summary>
/// Create a dynamic virtual channel
/// </summary>
/// <param name="priority">Priority</param>
/// <param name="channelName">Channel name</param>
/// <param name="transportType">Transport type</param>
/// <param name="receiveCallBack">Callback method called when received data</param>
/// <returns>DVC created</returns>
public DynamicVirtualChannel CreateChannel(TimeSpan timeout, ushort priority, string channelName, DynamicVC_TransportType transportType, ReceiveData receiveCallBack = null)
{
if (!transportDic.ContainsKey(transportType))
{
throw new InvalidOperationException("Not create DVC transport:" + transportType);
}
UInt32 channelId = DynamicVirtualChannel.NewChannelId();
DynamicVirtualChannel channel = new DynamicVirtualChannel(channelId, channelName, priority, transportDic[transportType]);
if (receiveCallBack != null)
{
// Add event method here can make sure processing the first DVC data packet
channel.Received += receiveCallBack;
}
channelDicbyId.Add(channelId, channel);
this.SendDVCCreateRequestPDU(priority, channelId, channelName, transportType);
CreateRespDvcPdu createResp = this.ExpectDVCCreateResponsePDU(timeout, channelId, transportType);
if (createResp == null)
{
throw new System.IO.IOException("Creation of channel: " + channelName + " failed, cannot receive a Create Response PDU");
}
if (createResp.CreationStatus < 0)
{
//Create failed
throw new System.IO.IOException("Creation of DVC failed with error code: " + createResp.CreationStatus + ", channel name is " + channelName);
}
return(channel);
}
/// <summary>
/// Send a DVC Create Response PDU
/// </summary>
/// <param name="channelId"></param>
/// <param name="creationStatus"></param>
/// <param name="transportType"></param>
private void SendDVCCreateResponsePDU(uint channelId, int creationStatus, DynamicVC_TransportType transportType)
{
CreateRespDvcPdu createResp = pduBuilder.CreateCreateRespDvcPdu(channelId, creationStatus);
this.Send(createResp, transportType);
}