UDP timeout help needed!!!

[ddolheguy]

I am developing an application in VB.NET which uses the Sockets namespace - UDPClient(). I am having trouble as when I wait to receive some data from an ipaddress it just waits forever.

I believe my problem is related to timeout and would like to know how best to set the value?

My Example Code:

Dim addr As IPAddress = System.Net.IPAddress.Parse("169.1.1.1")
Dim udpClient As New System.Net.Sockets.UdpClient()
Dim sendBytes As [Byte]() = Encoding.ASCII.GetBytes("Hello")
Dim remoteIpEndPoint As New System.Net.IPEndPoint(addr.Address, 100)

Try
   udpClient.Send(sendBytes, sendBytes.Length, remoteIpEndPoint)

    ' Blocks until a message returns on this socket from a remote host
    Dim receiveBytes As [Byte]() = udpClient.Receive(remoteIpEndPoint)
    Dim returnData As String = Encoding.ASCII.GetString(receiveBytes)

    Console.WriteLine(returnData.ToString())
Catch e As Exception
    Console.WriteLine(e.ToString())
End Try

The above code works fine until the receiveBytes line where it just hangs until it receives some data, which could be forever. I need to say "Wait for 5 seconds and if nothing then continue".

Can somebody please help????

[trisuglow]

According to MSDN Receive() blocks until it gets some data. Unless you can find a non-blocking method I think the only way is to start a new thread containing the Receive() command and kill it after five secods if it hasn't already terminated.

[nemaroller]

Perhaps this would work...

Public Class MyUDP
    Inherits System.Net.Sockets.UdpClient
    Public Function TimeOutValue(ByVal value As Integer) As Boolean
        Me.SettimeOut(value)      
 
       'or this
       Dim r as System.Net.Sockets.Socket = Me.Client
       r.SetSocketOption(Net.Sockets.SocketOptionLevel.Udp, Net.Sockets.SocketOptionName.ReceiveTimeout, value)
       '
    End Function
End Class

You would have to instantiate the class, connect, then set the time out, then call the receive method.