public static SteamGameServerQueryEndPoint[] GetServerList(string gamename,
Action <SteamGameServerQueryEndPoint> itemGenerated)
{
// https://developer.valvesoftware.com/wiki/Master_Server_Query_Protocol
var queryEndPoints = new List <SteamGameServerQueryEndPoint>(5000);
var addressBytes = new byte[4];
var portBytes = new byte[2];
var dnsEntry = System.Net.Dns.GetHostEntry("hl2master.steampowered.com");
//var ip = dnsEntry.AddressList.Length > 1 ? dnsEntry.AddressList[1] : dnsEntry.AddressList[0];
foreach (var ip in dnsEntry.AddressList)
{
Debug.WriteLine($"Read from {ip}");
var roundtrips = 0;
IPEndPoint lastEndPoint = new IPEndPoint(0, 0);
queryEndPoints.Clear();
using (System.Net.Sockets.UdpClient udp = new System.Net.Sockets.UdpClient())
{
queryEndPoints.Clear();
var hasErros = false;
//udp.Connect("208.64.200.52", 27011);
while (true)
{
byte[] buffer = null;
try
{
udp.Connect(ip, 27011);
string request = "1ÿ";
request += lastEndPoint + "\0";
request += "\\gamedir\\" + gamename;
//request += "\\empty\\0";
#if DEBUG //request += @"\name_match\*EUTW*";
#endif
request += "\0";
var bytes = CharEncoding.GetBytes(request);
//udp.Connect("146.66.155.8", 27019);
IPEndPoint endp = udp.Client.RemoteEndPoint as IPEndPoint;
udp.Client.ReceiveTimeout = 900;
var sendlen = udp.Send(bytes, bytes.Length);
#if DEBUG
if (sendlen != bytes.Length)
{
Trace.WriteLine("IServerRepository.GetServerList - sendlen != bytes.Length");
}
#endif
roundtrips++;
buffer = udp.Receive(ref endp);
}
catch (System.Net.Sockets.SocketException)
{
//hasErros = true;
break;
}
catch (TimeoutException)
{
hasErros = true;
break;
}
catch (ObjectDisposedException)
{
hasErros = true;
break;
}
using (var mem = new System.IO.MemoryStream(buffer, false))
using (var br = new System.IO.BinaryReader(mem, Encoding.UTF8))
{
var i = br.ReadUInt32();
i = br.ReadUInt16();
while (mem.Position < mem.Length)
{
addressBytes[0] = br.ReadByte();
addressBytes[1] = br.ReadByte();
addressBytes[2] = br.ReadByte();
addressBytes[3] = br.ReadByte();
portBytes[0] = br.ReadByte();
portBytes[1] = br.ReadByte();
int port = portBytes[0] << 8 | portBytes[1];
if (addressBytes.All(b => b == 0))
{
break;
}
lastEndPoint = new IPEndPoint(new IPAddress(addressBytes), port);
var item = new SteamGameServerQueryEndPoint();
item.Host = lastEndPoint.Address;
item.QueryPort = lastEndPoint.Port;
queryEndPoints.Add(item);
if (itemGenerated != null)
{
itemGenerated(item);
}
}
Debug.WriteLine("RoundTrips {0} - {1}", roundtrips, lastEndPoint.ToString());
if (addressBytes.All(b => b == 0))
{
break;
}
}
}
if (!hasErros)
{
break;
}
}
}
return(queryEndPoints.Distinct(new SteamGameServerQueryEndPointComparer()).ToArray());
}
public static SteamGameServer GetServerInfo(SteamGameServerQueryEndPoint gameServerQueryEndpoint)
{
return(GetServerInfo(new IPEndPoint(gameServerQueryEndpoint.Host, gameServerQueryEndpoint.QueryPort)));
}
