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- using System;
- using System.IO;
- using System.Net;
- using System.Net.NetworkInformation;
- using System.Net.Sockets;
- using Server.Network;
- namespace Server.Misc
- {
- public class ServerList
- {
- /*
- * The default setting for Address, a value of 'null', will use your local IP address. If all of your local IP addresses
- * are private network addresses and AutoDetect is 'true' then ServUO will attempt to discover your public IP address
- * for you automatically.
- *
- * If you do not plan on allowing clients outside of your LAN to connect, you can set AutoDetect to 'false' and leave
- * Address set to 'null'.
- *
- * If your public IP address cannot be determined, you must change the value of Address to your public IP address
- * manually to allow clients outside of your LAN to connect to your server. Address can be either an IP address or
- * a hostname that will be resolved when ServUO starts.
- *
- * If you want players outside your LAN to be able to connect to your server and you are behind a router, you must also
- * forward TCP port 2593 to your private IP address. The procedure for doing this varies by manufacturer but generally
- * involves configuration of the router through your web browser.
- *
- * ServerList will direct connecting clients depending on both the address they are connecting from and the address and
- * port they are connecting to. If it is determined that both ends of a connection are private IP addresses, ServerList
- * will direct the client to the local private IP address. If a client is connecting to a local public IP address, they
- * will be directed to whichever address and port they initially connected to. This allows multihomed servers to function
- * properly and fully supports listening on multiple ports. If a client with a public IP address is connecting to a
- * locally private address, the server will direct the client to either the AutoDetected IP address or the manually entered
- * IP address or hostname, whichever is applicable. Loopback clients will be directed to loopback.
- *
- * If you would like to listen on additional ports (i.e. 22, 23, 80, for clients behind highly restrictive egress
- * firewalls) or specific IP adddresses you can do so by modifying the file SocketOptions.cs found in this directory.
- */
- public static readonly string Address = null;
- public static readonly string ServerName = "My Shard";
- public static readonly bool AutoDetect = true;
- private static IPAddress m_PublicAddress;
- public static void Initialize()
- {
- if (Address == null)
- {
- if (AutoDetect)
- AutoDetection();
- }
- else
- {
- Resolve(Address, out m_PublicAddress);
- }
- EventSink.ServerList += new ServerListEventHandler(EventSink_ServerList);
- }
- private static void EventSink_ServerList(ServerListEventArgs e)
- {
- try
- {
- NetState ns = e.State;
- Socket s = ns.Socket;
- IPEndPoint ipep = (IPEndPoint)s.LocalEndPoint;
- IPAddress localAddress = ipep.Address;
- int localPort = ipep.Port;
- if (IsPrivateNetwork(localAddress))
- {
- ipep = (IPEndPoint)s.RemoteEndPoint;
- if (!IsPrivateNetwork(ipep.Address) && m_PublicAddress != null)
- localAddress = m_PublicAddress;
- }
- e.AddServer(ServerName, new IPEndPoint(localAddress, localPort));
- }
- catch
- {
- e.Rejected = true;
- }
- }
- private static void AutoDetection()
- {
- if (!HasPublicIPAddress())
- {
- Console.Write("ServerList: Auto-detecting public IP address...");
- m_PublicAddress = FindPublicAddress();
- if (m_PublicAddress != null)
- Console.WriteLine("done ({0})", m_PublicAddress.ToString());
- else
- Console.WriteLine("failed");
- }
- }
- private static void Resolve(string addr, out IPAddress outValue)
- {
- if (IPAddress.TryParse(addr, out outValue))
- return;
- try
- {
- IPHostEntry iphe = Dns.GetHostEntry(addr);
- if (iphe.AddressList.Length > 0)
- outValue = iphe.AddressList[iphe.AddressList.Length - 1];
- }
- catch
- {
- }
- }
- private static bool HasPublicIPAddress()
- {
- NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
- foreach (NetworkInterface adapter in adapters)
- {
- IPInterfaceProperties properties = adapter.GetIPProperties();
- foreach (IPAddressInformation unicast in properties.UnicastAddresses)
- {
- IPAddress ip = unicast.Address;
- if (!IPAddress.IsLoopback(ip) && ip.AddressFamily != AddressFamily.InterNetworkV6 && !IsPrivateNetwork(ip))
- return true;
- }
- }
- return false;
- /*
- IPHostEntry iphe = Dns.GetHostEntry( Dns.GetHostName() );
- IPAddress[] ips = iphe.AddressList;
- for ( int i = 0; i < ips.Length; ++i )
- {
- if ( ips[i].AddressFamily != AddressFamily.InterNetworkV6 && !IsPrivateNetwork( ips[i] ) )
- return true;
- }
- return false;
- */
- }
- private static bool IsPrivateNetwork(IPAddress ip)
- {
- // 10.0.0.0/8
- // 172.16.0.0/12
- // 192.168.0.0/16
- if (ip.AddressFamily == AddressFamily.InterNetworkV6)
- return false;
- if (Utility.IPMatch("192.168.*", ip))
- return true;
- else if (Utility.IPMatch("10.*", ip))
- return true;
- else if (Utility.IPMatch("172.16-31.*", ip))
- return true;
- else
- return false;
- }
- private static IPAddress FindPublicAddress()
- {
- try
- {
- String ip = "";
- WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
- request.Timeout = 15000;
- using (WebResponse response = request.GetResponse())
- {
- using (StreamReader stream = new StreamReader(response.GetResponseStream()))
- {
- ip = stream.ReadToEnd();
- }
- }
- int first = ip.IndexOf("Address: ") + 9;
- int last = ip.LastIndexOf("</body>");
- ip = ip.Substring(first, last - first);
- return IPAddress.Parse(ip);
- }
- catch
- {
- return null;
- }
- }
- }
- }
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