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Use default network interface

This commit is contained in:
Santiago Lo Coco 2024-11-03 22:50:40 +01:00
parent 3eb8b08d8d
commit 1043b2c541
1 changed files with 57 additions and 2 deletions
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59
Assets/Scripts/ServiceDiscovery.cs
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@ -1,6 +1,7 @@
using System;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
@ -17,19 +18,73 @@ public class ServiceDiscovery : MonoBehaviour
private string receivedPath;
private string receivedHost;
private IPAddress defaultIP;
private const string multicastAddress = "224.0.0.251";
private const int multicastPort = 5353;
private Queue<MdnsService> serviceQueue = new Queue<MdnsService>();
private IPAddress GetDefaultInterfaceIP()
{
foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
var ipProps = ni.GetIPProperties();
if (ipProps.GatewayAddresses.Count > 0)
{
foreach (UnicastIPAddressInformation ip in ipProps.UnicastAddresses)
{
if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
{
return ip.Address;
}
}
}
}
}
return null;
}
private List<IPAddress> GetRoutableLocalIPs()
{
List<IPAddress> localIPs = new List<IPAddress>();
foreach (IPAddress local in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
{
if (local.AddressFamily == AddressFamily.InterNetwork)
{
byte[] bytes = local.GetAddressBytes();
if (bytes[0] == 169 && bytes[1] == 254)
{
Debug.Log($"Skipping non-routable address: {local}");
continue;
}
localIPs.Add(local);
}
}
return localIPs;
}
public void StartListening(Action<MdnsService> action)
{
try
{
defaultIP = GetDefaultInterfaceIP();
if (defaultIP == null)
{
Debug.LogError("No default interface found. Cannot start multicast listener.");
return;
}
udpClient = new UdpClient();
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpClient.Client.Bind(new IPEndPoint(IPAddress.Any, multicastPort));
udpClient.JoinMulticastGroup(IPAddress.Parse(multicastAddress));
udpClient.Client.Bind(new IPEndPoint(defaultIP, multicastPort));
udpClient.JoinMulticastGroup(IPAddress.Parse(multicastAddress), defaultIP);
this.action = action;