UDP Packets not received?

I made a script that sends and receives udp broadcasts between two PCs. Its the same script on both PCs. PC A can see packets from PC B, but it doesn't work the other way around. I checked with wireshark on PC B and can see the packets from A arriving, they just don't register in unity. Does anyone know what this could be?

This is the listening part of my code. PC B does get into the listenCallback but the ar.endpoint = 0.0.0.0 instead of the ip address of A and the execution stops (without an error thrown) at the receivedBytes line.

Code (CSharp):

1.  private static void listen() {
2.             if (udpClient != null) udpClient.Close();
3.             Debug.Log("Listen!");
4.  
5.             IPEndPoint ep1 = new IPEndPoint(IPAddress.Any, port);
6.             UdpClient uc1 = new UdpClient(ep1);
7.            
8.             UdpState us1 = new UdpState();
9.             us1.e = ep1;
10.             us1.u = uc1;
11.             uc1.BeginReceive(new AsyncCallback(listenCallback), us1);
12.  
13.             udpClient = uc1;
14.         }
15.  
16.         private static void listenCallback(IAsyncResult ar) {
17.             UdpClient uc1 = ((UdpState)(ar.AsyncState)).u;
18.             IPEndPoint ep1 = ((UdpState)(ar.AsyncState)).e;
19.             byte[] receivedBytes = uc1.EndReceive(ar, ref ep1);
20.             Debug.Log("Received something");
21.             uc1.Close();
22.  
23.             string ip = ep1.Address.ToString();
24.             NetworkResident r = residents.Find(i => i.ip == ip);
25.             if (r != null)
26.                 r.lastSeen = DateTime.Now.Ticks;
27.             else {
28.                 r = new NetworkResident(ep1.Address, receivedBytes);
29.                 residents.Add(r);
30.                 onNewResident();
31.             }
32.         }

 

anyone??

 

When a networking issue occurs with the same build on one computer but not the other, chances are it is software firewall settings on the problem computer.

 

I agree... but I disabled the firewall and still nothing...