/// <summary>
/// Retrieves information about the server
/// </summary>
/// <returns>Instance of ServerInfo class</returns>
protected virtual ServerInfo GetInfoCore()
{
var Query = QueryMsg.InfoQuery;
if (IsObsolete)
{
Query = QueryMsg.ObsoleteInfoQuery;
}
var sw = new Stopwatch();
var recvData = socket.GetResponse(Query, Type, sw);
Latency = sw.ElapsedMilliseconds;
try
{
switch (recvData[0])
{
case 0x49: return(Current(recvData));
case 0x6D: return(Obsolete(recvData));
default: throw new InvalidHeaderException("packet header is not valid");
}
}
catch (Exception e)
{
e.Data.Add("ReceivedData", recvData);
throw;
}
}
/// <summary>
/// Retrieves information about the server
/// </summary>
/// <returns>Instance of ServerInfo class</returns>
public virtual ServerInfo GetInfo()
{
byte[] Query = QueryMsg.InfoQuery;
if (IsObsolete)
{
Query = QueryMsg.ObsoleteInfoQuery;
}
byte[] recvData = new byte[socket.BufferSize];
Stopwatch sw = Stopwatch.StartNew();
recvData = socket.GetResponse(Query, Type);
sw.Stop();
Latency = sw.ElapsedMilliseconds;
try
{
switch (recvData[0])
{
case 0x49: return(Current(recvData));
case 0x6D: return(Obsolete(recvData));
default: throw new InvalidHeaderException("packet header is not valid");
}
}
catch (Exception e)
{
e.Data.Add("ReceivedData", recvData);
throw;
}
}
internal Server(IPEndPoint address, EngineType type, bool?isObsolete, int sendTimeOut, int receiveTimeOut)
{
ServerEndPoint = address;
Retries = 3;
socket = new UdpQuery(address, sendTimeOut, receiveTimeOut);
IsDisposed = false;
Type = type;
if (isObsolete == null)
{
try
{
if (socket.GetResponse(QueryMsg.ObsoleteInfoQuery, Type)[0] == 0x6D)
{
IsObsolete = true;
}
}
catch (SocketException e)
{
if (e.ErrorCode == 10060)
{
IsObsolete = false;
}
}
}
else
{
IsObsolete = isObsolete == true;
}
}
public override string SendCommand(string command)
{
byte[] rconMsg = Util.MergeByteArrays(RconQuery, Util.StringToBytes(ChallengeId), Util.StringToBytes(" \"" + RConPass + "\" " + command));
byte[] recvData = new byte[2000];
string s;
recvData = socket.GetResponse(rconMsg, EngineType.GoldSource);
try
{
s = Util.BytesToString(recvData).Remove(0, 1);
}
catch (Exception e)
{
e.Data.Add("ReceivedData", recvData);
throw;
}
return(s);
}
/// <summary>
/// Retrieves information about the server
/// </summary>
/// <returns>Instance of ServerInfo class</returns>
protected virtual ServerInfo GetInfoCore(byte[] s2cChallenge = null)
{
// in order to prevent reflection/amplification DDoS attacks, Valve decided in Dec 2020 to change the A2S_INFO protocol:
// https://steamcommunity.com/discussions/forum/14/2974028351344359625/
// The first request is sent without a challenge, the server may reply with the data directly (as before) or with an S2C_CHALLENGE including a 4 byte challenge.
// In this case the client resends the A2S_INFO query with the challenge appended
var Query = QueryMsg.InfoQuery;
if (IsObsolete)
{
Query = QueryMsg.ObsoleteInfoQuery;
}
if (s2cChallenge != null)
{
Query = new byte[QueryMsg.InfoQuery.Length + 4];
Array.Copy(QueryMsg.InfoQuery, Query, QueryMsg.InfoQuery.Length);
Array.Copy(s2cChallenge, 1, Query, QueryMsg.InfoQuery.Length, 4);
}
var sw = new Stopwatch();
var recvData = socket.GetResponse(Query, Type, sw);
Latency = sw.ElapsedMilliseconds;
try
{
switch (recvData[0])
{
case 0x49: return(DataReceived(recvData));
case 0x6D: return(Obsolete(recvData));
case 0x41:
if (s2cChallenge == null) // prevent endless loop/recursion
{
return(ChallengeReceived(recvData));
}
throw new InvalidHeaderException("A2S_INFO failed after challenge");
default: throw new InvalidHeaderException("packet header is not valid");
}
}
catch (Exception e)
{
e.Data.Add("ReceivedData", recvData);
throw;
}
}
internal Server(IPEndPoint address, EngineType type, bool? isObsolete, int sendTimeOut, int receiveTimeOut)
{
ServerEndPoint = address;
Retries = 3;
socket = new UdpQuery(address, sendTimeOut, receiveTimeOut);
IsDisposed = false;
Type = type;
if (isObsolete == null)
{
try
{
if (socket.GetResponse(QueryMsg.ObsoleteInfoQuery, Type)[0] == 0x6D)
IsObsolete = true;
}
catch (SocketException e)
{
if (e.ErrorCode == 10060)
IsObsolete = false;
}
}
else
IsObsolete = isObsolete == true;
}