public static void ShutDown()
{
if (info != null)
{
info.Close();
info = null;
Debug.Log("关闭udp服务器成功");
}
else
{
Debug.LogWarning("重复udp服务器");
}
}
public static void Listen()
{
if (!CheckNet())
{
return;
}
if (info != null)
{
Debug.LogWarning("请勿重复开启udp服务器");
}
else
{
#if XRUWP && !UNITY_EDITOR
info = new UdpInfo(Port.ToString());
#else
IPEndPoint ip = new IPEndPoint(IPAddress.Any, Port);
info = new UdpInfo(ip);
#endif
info.Receive();
Debug.Log("upd服务器开启，开始监听:" + ip);
}
}
/// <summary>
/// Open the connection to the EV3 over a WiFi connection - this will block
/// </summary>
public override void Open()
{
bool hasError = false;
bool failedToLocateEV3 = true;
int listenPort = 3015;
int tcpIpPort = 5555;
UdpClient listener = null;
UdpClient sender = null;
try
{
listener = new UdpClient(listenPort);
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
byte[] bytes = null;
var resetEvent = new ManualResetEvent(false);
Thread t = new Thread(
new ThreadStart(
delegate()
{
try{
bytes = listener.Receive(ref groupEP);
resetEvent.Set();
}
catch {
}
}
));
t.IsBackground = true;
t.Priority = ThreadPriority.Normal;
t.Start();
if (timeOut != 0)
{
if (!resetEvent.WaitOne(timeOut))
{
listener.Close();
}
}
else
{
resetEvent.WaitOne(); //wait forever
}
if (bytes != null)
{
failedToLocateEV3 = false;
UdpInfo udpInfo = new UdpInfo(System.Text.Encoding.ASCII.GetString(bytes, 0, bytes.Length));
Thread.Sleep(100);
sender = new UdpClient();
sender.Send(new byte[] { 0x00 }, 1, groupEP);
Thread.Sleep(100);
tcpClient = new TcpClient(groupEP.Address.ToString(), tcpIpPort);
tcpClient.NoDelay = true;
stream = tcpClient.GetStream();
tcpClient.SendTimeout = 3000;
tcpClient.ReceiveTimeout = 3000;
stream.Write(udpInfo.TcpUnlockData, 0, udpInfo.TcpUnlockData.Length);
byte[] unlockReply = new byte[16];
stream.ReadAll(unlockReply);
}
else
{
hasError = true;
}
}
catch
{
hasError = true;
}
finally
{
if (listener != null)
{
listener.Close();
}
if (sender != null)
{
sender.Close();
}
}
if (hasError)
{
if (failedToLocateEV3)
{
throw new ConnectionException(ConnectionError.OpenError, new Exception("Failed to find EV3"));
}
else
{
throw new ConnectionException(ConnectionError.OpenError);
}
}
}
