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Question by AkshayVats · Mar 05, 2015 at 11:02 AM · multiplayerandroid buildudp

Finding running servers on LAN

I am making a multiplayer game playable on local wifi. I want this game to find and list the running servers from local network. I read this and I am using following code to create multicast group.

         isMulticastEnabled = true;
         udp_client = new UdpClient();
 
         udp_client.ExclusiveAddressUse = false;
         
 
         udp_client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
         udp_client.ExclusiveAddressUse = false;
 
         udp_client.Client.Bind(localEp);
 
         udp_client.JoinMulticastGroup(multicastaddress);
 
 
         Thread thread = new Thread(() =>
         {
             while (isMulticastEnabled)
             {
                 var data = udp_client.Receive(ref localEp);
                 using (var ms = new System.IO.MemoryStream(data))
                 {
                     BinaryFormatter bf = new BinaryFormatter();
                     var msg = bf.Deserialize(ms) as Message;
                     if (msg.arg1 != Administrator.Inst.User.pid)
                     {
                         RunOnUI(() => { Administrator.Inst.ProcessMessage(msg); });
                     }
                 }
             }
         });
         thread.Start();

Sending function goes like this -

 public void MulticastMsg(Message msg)
     {
         byte[] data;
         using (var ms = new System.IO.MemoryStream())
         {
             BinaryFormatter bf = new BinaryFormatter();
             bf.Serialize(ms, msg);
             data = ms.ToArray();
         }
         udp_client.Send(data, data.Length, remoteep);
     }

Works fine on PC to PC but android devices are unable to receive multicast messages.Some answers suggest that android only processes packets directed to its address. I am stuck here and I'll appreciate any help. If there is a unity way of doing this that I am unaware of, please do suggest me that.

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