[英]Send UDP data from client (Unity) and send data back to same client from server
我在Unity中玩游戲,試圖將數據從客戶端發送到服務器,然后再發送回客戶端(試圖保存實例),但是當我接收數據並嘗試將數據發送回客戶端時,它說udp客戶端未連接。
它成功地將數據從我的Unity客戶端發送到服務器,但是一旦到達那里,套接字就斷開了連接,我什么也無法發回。 如您所見,我已經嘗試設置一些多播選項,但是它似乎無法正常工作。
客戶:
private void SetupConnection()
{
try
{
_thread = new Thread(ReceiveData);
_thread.IsBackground = true;
udpClient = new UdpClient();
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpClient.ExclusiveAddressUse = false;
udpClient.Client.Bind(new IPEndPoint(IPAddress.Parse(serverAdress), 32212));
udpClient.BeginReceive(new AsyncCallback(ReceiveUdpCallback), udpClient);
_client = new TcpClient(serverAdress, port);
_stream = _client.GetStream();
_thread.Start();
isConnected = true;
}
catch(Exception e)
{
CloseConnection();
connectionError = true;
Debug.Log(e.ToString());
}
}
public void ReceiveUdpCallback(IAsyncResult ar)
{
UdpClient c = (UdpClient)ar.AsyncState;
IPEndPoint receivedIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
Byte[] receivedBytes1 = c.EndReceive(ar, ref receivedIpEndPoint);
Debug.Log("coming in receiveudpcallback!: " + receivedBytes1);
Dictionary<string, string> values = new Dictionary<string, string>();
Byte[] receivedBytes;
try
{
receivedBytes = c.EndReceive(ar, ref receivedIpEndPoint);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
return;
}
if (receivedBytes != null)
{
//byte[] dataBuffer = new byte[receivedBytesInt];
// Array.Copy(_buffer, dataBuffer, receivedBytesInt);
string textReceived = Encoding.ASCII.GetString(receivedBytes);
Dictionary<string, string> data = GetDicValues(textReceived);
HandleInputMessage(c, data);
}
udpClient.BeginReceive(ReceiveUdpCallback, ar.AsyncState);
}
服務器:
private void SetupServer()
{
Console.WriteLine("Setting up Server...");
_serverSocket.Bind(new IPEndPoint(IPAddress.Any, 32211));
_serverSocket.Listen(1);
Console.WriteLine("Server is running...");
_serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), null);
IPEndPoint localpt = new IPEndPoint(IPAddress.Any, 32212);
udpServer = new UdpClient();
udpServer.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpServer.ExclusiveAddressUse = false; // only if you want to send/receive on same machine.
udpServer.Client.Bind(new IPEndPoint(IPAddress.Any, 32212));
udpServer.BeginReceive(new AsyncCallback(ReceiveUdpCallback), udpServer);
public void ReceiveUdpCallback(IAsyncResult ar)
{
UdpClient c = (UdpClient)ar.AsyncState;
IPEndPoint receivedIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
//Byte[] receivedBytes = c.EndReceive(ar, ref receivedIpEndPoint);
Console.WriteLine("coming in receiveudpcallback!");
Dictionary<string, string> values = new Dictionary<string, string>();
Byte[] receivedBytes;
try
{
receivedBytes = c.EndReceive(ar, ref receivedIpEndPoint);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
return;
}
if (receivedBytes != null)
{
string textReceived = Encoding.ASCII.GetString(receivedBytes);
HandleInputMessage(c, textReceived);
}
else
{
}
c.BeginReceive(ReceiveUdpCallback, ar.AsyncState);
}
因此,服務器中的UdpClient實例將保存到播放器中,稍后在我的代碼中,我嘗試使用以下方法發送回客戶端:
public void FlushUdp()
{
string msgToSend = "<opcode:" + opcode + ">";
msgToSend += "<username:" + player.username + ">";
foreach (KeyValuePair<string, string> entry in values)
{
msgToSend += "<" + entry.Key + ":" + entry.Value + ">";
}
byte[] bytesToSend = Encoding.ASCII.GetBytes(msgToSend);
udpClient.Send(bytesToSend, bytesToSend.Length);
}
編輯:
我修復了它,並在每次收到消息時都重新連接到服務器/客戶端,從而解決了該問題。
你應該叫c.EndReceive(...)
唯一的 :
public void ReceiveUdpCallback(IAsyncResult ar)
{
UdpClient c = (UdpClient)ar.AsyncState;
IPEndPoint receivedIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
Byte[] receivedBytes1 = c.EndReceive(ar, ref receivedIpEndPoint); // <----------------
Debug.Log("coming in receiveudpcallback!: " + receivedBytes1);
Dictionary<string, string> values = new Dictionary<string, string>();
Byte[] receivedBytes;
try
{
receivedBytes = c.EndReceive(ar, ref receivedIpEndPoint); // <----------------
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
return;
}
if (receivedBytes != null)
{
//byte[] dataBuffer = new byte[receivedBytesInt];
// Array.Copy(_buffer, dataBuffer, receivedBytesInt);
string textReceived = Encoding.ASCII.GetString(receivedBytes);
Dictionary<string, string> data = GetDicValues(textReceived);
HandleInputMessage(c, data);
}
udpClient.BeginReceive(ReceiveUdpCallback, ar.AsyncState);
}
同樣, EndReceive()
可能永遠不會返回null
而是返回一個空數組。 ( receivedBytes.Length == 0
) 。 返回的0字節將指示斷開連接(與TCP相同)
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