public void Send(byte[] information)
{
CheckPacketNumber();
pocketNumber++;
maintainPacket = new MCPPacket(pocketNumber, myIpAddress, myPort, MCPState.Information, information);
connection.Send(maintainPacket.GetPacketBytes());
}
public MCPConnector(IPAddress multicastAddress, int port, int ttl, IPAddress myIpAddress, int myPort, int maintainDelay)
{
//create connection for listener
IPEndPoint whom = new IPEndPoint(multicastAddress, port);//default, becase listener will't send
IPEndPoint wherefrom = whom;
IPEndPoint bindEP = new IPEndPoint(IPAddress.Any, port);
connection = new MulticastUdpConnection(whom, wherefrom, bindEP, ttl);
//create listener
listener = new Listener();
listener.Init(connection);
listener.MessageAvailableEvent += NewMessageTask;
this.myIpAddress = myIpAddress;
this.myPort = myPort;
this.maintainDelay = maintainDelay;
pocketNumber = 0;
maintainPacket = new MCPPacket(pocketNumber, myIpAddress, myPort, MCPState.Reset);
Send(maintainPacket.GetPacketBytes());
pocketNumber += 1;
maintainPacket = new MCPPacket(pocketNumber, myIpAddress, myPort, MCPState.MaintainConnection);
maintainThread = new Thread(MaintainConnection);
maintainThread.Start();
}
public void Close()
{
CheckPacketNumber();
pocketNumber++;
maintainPacket = new MCPPacket(pocketNumber, myIpAddress, myPort, MCPState.Close);
connection.Send(maintainPacket.GetPacketBytes());
IsWork = false;
maintainThread.Abort();
Stop();
//close and connection too
listener.Close();
}
private void MaintainConnection()
{
while (true)
{
while (IsWork)
{
connection.Send(maintainPacket.GetPacketBytes());
Thread.Sleep(maintainDelay);
}
waitHandle.WaitOne();
}
}
private void CheckPacketNumber()
{
Random random = new Random();
if (pocketNumber == UInt32.MaxValue)
{
maintainPacket = new MCPPacket(0, myIpAddress, myPort, MCPState.Reset);
connection.Send(maintainPacket.GetPacketBytes());
pocketNumber = 1;
int sleeptime = random.Next() % (2 * maintainDelay) + maintainDelay;
Thread.Sleep(sleeptime);
}
}
