udpclient

I am receiving data from UdpClient via the usual async callback: private void OnUdpData(IAsyncResult result) { byte[] data = _udpReceive.EndReceive(result, ref _receiveEndPoint); //Snip doing stuff with data _udpReceive.BeginReceive(OnUdpData, null); } When I Close() the UdpClient in the main thread, the callback fires as I would expect, but at this point _udpReceive is already disposed and I get an ObjectDisposedException when I try and call EndReceive() . I was expecting to just get an empty buffer. What is the correct way to handle this? Is there some member of UdpClient I can check before

I've got a computer with multiple NICs - and UDPClient's send method continually fails. Here's the code: private static void receiveData() { recvSock = new UdpClient(PORT); //recvSock.Client.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, mainInterface); recvSock.JoinMulticastGroup(IPAddress.Parse(IP), 50); IPEndPoint iep = new IPEndPoint(IPAddress.Any, 0); while (true) { byte[] data = recvSock.Receive(ref iep); // Do not include messages from us if (myIPs.Contains(iep.Address)) continue; string stringData = Encoding.ASCII.GetString(data, 0, data.Length); Console

This is maybe a stupid question, but since I am relatively new to UDP here it goes... If I am having two separate byte arrays that I need the receiving side to get as one big array, for example: byte[] Array1 = {1,1,1} byte[] Array2 = {2,2,2} Can I avoid having to create a buffer and copy each array into it, and then send that buffer, like this: byte[] Buffer= new byte[Array1.Length + Array2.Length]; Buffer.BlockCopy(Array1, 0, Buffer, 0, Array1.Length); Buffer.BlockCopy(Array2, 0, Buffer, Array1.Length, Array2.Length); udpClient.Send(Buffer, Buffer.Length); Because if the two are big, and

Any example design code in C# or VB.NET ? Looking for a UDP Pipe example in .NET I downloaded Simple UDP proxy/pipe 0.4.1 by Luigi Auriemma Which is in C++.. it works perfectly.. but I want to make my own implemention in .NET.. so I can sniff packets directly. Fixed it here is the solution if anyone wants to learn how I fixed it.. Please note this is probably the only UDP Proxy on all of google if you stumbled upon this.. that is coded in C#.. easily ported to VB.NET with online .NET converter Be happy this code works ;) Sure it's not efficient because it doesn't use events.. like ReceiveAsync

I am making an Win RT app that connects to a desktop app and they start to communicate in UDP and TCP. I have successfully implemented TCP communication in that I can send from Win RT to Desktop and send from Desktop to Win RT. using StreamSocket on Win RT and TcpListener on desktop. I also made it to send Udp data from Win RT to desktop without any problem. But I can't receive data's sent from desktop to Win RT. I use the following code and I don't see any problem with that but there must something. var g = new DatagramSocket(); g.MessageReceived += g_MessageReceived; g.BindEndpointAsync(new

I am using recvfrom() to get the UDP datagram into my buffer and passing non-NULL from_addr structure & len argument expecting it to get the source IP. But for the first call, they are NULL. Subsequent calls are filling the addr structure and len field. Is this expected ? #include <stdio.h> #include <string.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> int main() { struct sockaddr_in myaddr, from_addr; char from_ip[1024] = "", myip[2014] = ""; char rmsg[1024 * 1024] = ""; int sock_fd=-1,nbytes=0; int len=0; unsigned short port=0; sock_fd = socket(AF_INET, SOCK_DGRAM