asyncsocket | 易学教程

C# UDP Socket: Get receiver address

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问题 I have an asynchronous UDP server class with a socket bound on IPAddress.Any, and I'd like to know which IPAddress the received packet was sent to (...or received on). It seems that I can't just use the Socket.LocalEndPoint property, as it always returns 0.0.0.0 (which makes sense as it's bound to that...). Here are the interesting parts of the code I'm currently using: private Socket udpSock; private byte[] buffer; public void Starter(){ //Setup the socket and message buffer udpSock = new

ZMQ DEALER - ROUTER Communication

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I am currently working on a project that requires some communication over the network of a different data types from some entities of a distributed system and I am using ZMQ. The main goal of the project is to have a central node which services clients which can connect at any time. For each client connected, the central node should manage the message communication between the two. Currently, and by the moment, all communication is happening over TCP. The clients need to send and receive messages at any time so they are ZMQ_DEALER type sockets and the central node is ZMQ_ROUTER Initially, the

How to handle timeout in Async Socket?

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I have a code that using async socket to send message to client and expecting response from it. If the client did not reply in a specified internal it will considers timeout. Some of the article in Internet suggest to use WaitOne, but this will blocks the thread and defers the purpose of using I/O completion. What is the best way to handle timeout in async socket? Sub OnSend(ByVal ar As IAsyncResult) Dim socket As Socket = CType(ar.AsyncState ,Socket) socket.EndSend(ar) socket.BeginReceive(Me.ReceiveBuffer, 0, Me.ReceiveBuffer.Length, SocketFlags.None, New AsyncCallback(AddressOf OnReceive),

How to keep the android client connected to the server even on activity changes and send data to server?

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I initially implemented an async task in my activity which sends data to the server. But when i changed activities the connection was lost. To avoid this my approach was to implement a service that centralizes the network operation and sends data to the server and the code for this service is given below import java.io.BufferedWriter; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.InetAddress; import java.net.Socket; import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; import android.util.Log; import

How to keep the android client connected to the server even on activity changes and send data to server?

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问题 I initially implemented an async task in my activity which sends data to the server. But when i changed activities the connection was lost. To avoid this my approach was to implement a service that centralizes the network operation and sends data to the server and the code for this service is given below import java.io.BufferedWriter; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.InetAddress; import java.net.Socket; import android.app.Service; import android

How to handle timeout in Async Socket?

阅读更多关于 How to handle timeout in Async Socket?

问题 I have a code that using async socket to send message to client and expecting response from it. If the client did not reply in a specified internal it will considers timeout. Some of the article in Internet suggest to use WaitOne, but this will blocks the thread and defers the purpose of using I/O completion. What is the best way to handle timeout in async socket? Sub OnSend(ByVal ar As IAsyncResult) Dim socket As Socket = CType(ar.AsyncState ,Socket) socket.EndSend(ar) socket.BeginReceive(Me