internal KartMap(serverinfo_pak srv)
{
unsafe
{
InternalName = KartUtils.DecodeString(srv.mapname, serverinfo_pak.MAX_MAP_NAME_LENGTH);
Title = KartUtils.DecodeString(srv.maptitle, serverinfo_pak.MAX_MAP_TITLE_LENGTH);
MD5 = new byte[16];
for (var i = 0; i < 16; i++)
{
MD5[i] = srv.mapmd5[i];
}
}
ActNumber = srv.actnum;
IsZone = srv.iszone == 0 || srv.iszone == 1
? srv.iszone == 1
: throw new ArgumentOutOfRangeException(nameof(srv.iszone));
TimeElapsed = TimeSpan.FromSeconds(srv.leveltime / (double)KartUtils.SRB2_TICRATE);
}
internal KartServer(serverinfo_pak srv, IEnumerable <plrinfo> players, IEnumerable <(string Filename, byte[] Md5)> neededFiles)
/// <summary>
/// Attempts to query an SRB2Kart server for information.
/// </summary>
/// <param name="endpoint">The endpoint (IP address and port) of the server.</param>
/// <returns>A <see cref="KartServer"/> object representing server query information.</returns>
public static KartServer QueryServer(IPEndPoint endpoint)
{
using var client = new UdpClient(endpoint.Port)
{
Client = { ReceiveTimeout = (int)QueryTimeout }
};
client.Connect(endpoint);
// ask for server info
SendPacket(client, (byte)PT_ASKINFO, new byte[] { 0, 0, 0, 0, 0 });
var remoteEndpoint = new IPEndPoint(IPAddress.Any, 0);
var start = 0u;
var morePackets = true;
var srv = new serverinfo_pak();
var players = new List <plrinfo>();
var neededFiles = new List <(string Filename, byte[] Md5)>();
while (morePackets)
{
var received = client.Receive(ref remoteEndpoint);
var stream = new MemoryStream(received);
var header = ReadPacketComponent <doomdata_t>(stream);
var type = (packettype_t)header.packettype;
var timeout = 0;
switch (type)
{
case PT_SERVERINFO: // 13
srv = ReadPacketComponent <serverinfo_pak>(stream);
break;
case PT_PLAYERINFO: // 14
for (var i = 0; i < 16; i++)
{
players.Add(ReadPacketComponent <plrinfo>(stream));
}
SendPacket(client, (byte)PT_TELLFILESNEEDED, BitConverter.GetBytes(start));
break;
case PT_MOREFILESNEEDED:
var filesNeeded = ReadPacketComponent <filesneededconfig_pak>(stream);
start += filesNeeded.num;
neededFiles.AddRange(GetFilesNeeded(received));
if (filesNeeded.more == 1)
{
// ask for more files
SendPacket(client, (byte)PT_TELLFILESNEEDED, BitConverter.GetBytes(start));
}
else
{
morePackets = false;
}
break;
default:
if (++timeout == 5) // 5 invalid packets in a row
{
throw new Exception("Received 5 invalid response packets in a row.");
}
break;
}
}
return(new KartServer(srv, players, neededFiles));
}
