private byte[] PerformBigRequest(byte opcode)
{
//Create a request packet
byte[] rqstBytes = new byte[9];
rqstBytes[0] = (byte)0xff;
rqstBytes[1] = (byte)0xff;
rqstBytes[2] = (byte)0xff;
rqstBytes[3] = (byte)0xff;
rqstBytes[4] = (byte)opcode;
rqstBytes[5] = (byte)((_challenge >> 0) & 0xFF);
rqstBytes[6] = (byte)((_challenge >> 8) & 0xFF);
rqstBytes[7] = (byte)((_challenge >> 16) & 0xFF);
rqstBytes[8] = (byte)((_challenge >> 24) & 0xFF);
byte[] buf = null;
try
{
//Attempt to get the response
buf = SocketUtils.getInfo(_ipEnd, rqstBytes);
}
catch (SSQLServerException e)
{
throw e;
}
uint i = 0;
if (buf[i] == 'A') //if we need to resend the request with new challenge
{
i++; //move over the A
_challenge = ReadUint32(buf, ref i); //read the challenge we got
//put the challenge into the request
rqstBytes[5] = (byte)((_challenge >> 0) & 0xFF);
rqstBytes[6] = (byte)((_challenge >> 8) & 0xFF);
rqstBytes[7] = (byte)((_challenge >> 16) & 0xFF);
rqstBytes[8] = (byte)((_challenge >> 24) & 0xFF);
try
{
//Get the actual response
buf = SocketUtils.getInfo(_ipEnd, rqstBytes);
}
catch (SSQLServerException e)
{
throw e;
}
}
return(buf);
}
/// <summary>
/// Pings the specified Source server to retreive information about it such as the server name, max players, current number of players, etc.
/// </summary>
/// <param name="ip_end">The IPEndPoint object containing the IP address and port of the server</param>
/// <returns>Information about the server or throws an SSQLServerException if it could not be retreived</returns>
public ServerInfo Server(IPEndPoint ip_end)
{
//Create a new empty server info object
ServerInfo info = new ServerInfo();
//Create an empty buffer
byte[] buf = null;
//Create a new packet and request
Packet requestPacket = new Packet();
requestPacket.Data = "TSource Engine Query";
try
{
//Attempt to get the server info
buf = SocketUtils.getInfo(ip_end, requestPacket);
}
catch (SSQLServerException e)
{
throw e;
}
//Start past the first four bytes which are all 0xff
int i = 4;
//Make sure the first character is an I
if (buf[i++] != 'I')
{
return(null);
}
//Make sure the returned version is above 0x07
if (buf[i++] < 0x07)
{
return(null);
}
StringBuilder srvName = new StringBuilder();
//Retrieve the server name
while (buf[i] != 0x00)
{
srvName.Append((char)buf[i]);
i++;
}
//Move to the next byte
i++;
//Set the name of the server
info.Name = srvName.ToString();
StringBuilder mapName = new StringBuilder();
//Retrieve the map name
while (buf[i] != 0x00)
{
mapName.Append((char)buf[i]);
i++;
}
//Move to the next byte
i++;
info.Map = mapName.ToString();
StringBuilder gameName = new StringBuilder();
//Get the short name for the game
while (buf[i] != 0x00)
{
gameName.Append((char)buf[i]);
i++;
}
//Move to the next byte
i++;
StringBuilder gameFriendly = new StringBuilder();
//Get the friendly game description
while (buf[i] != 0x00)
{
gameFriendly.Append((char)buf[i]);
i++;
}
//Move to the next byte
i++;
info.Game = gameFriendly.ToString() + " (" + gameName.ToString() + ")";
short appID = (short)System.BitConverter.ToInt16(buf, i);
//Skip the next 2 bytes
i += 2;
//Store the app id
info.AppID = appID.ToString();
//Get the number of players
info.PlayerCount = buf[i++].ToString();
//Get the number of max players
info.MaxPlayers = buf[i++].ToString();
//Get the number of bots
info.BotCount = buf[i++].ToString();
//Get the dedicated server type
if ((char)buf[i] == 'l')
{
info.Dedicated = ServerInfo.DedicatedType.LISTEN;
}
else if ((char)buf[i] == 'd')
{
info.Dedicated = ServerInfo.DedicatedType.DEDICATED;
}
else if ((char)buf[i] == 'p')
{
info.Dedicated = ServerInfo.DedicatedType.SOURCETV;
}
//Move to the next byte
i++;
//Get the OS type
if ((char)buf[i] == 'l')
{
info.OS = ServerInfo.OSType.LINUX;
}
else if ((char)buf[i] == 'w')
{
info.OS = ServerInfo.OSType.WINDOWS;
}
//Move to the next byte
i++;
//Check for password protection
if (buf[i++] == 0x01)
{
info.Password = true;
}
//Check for VAC
if (buf[i++] == 0x01)
{
info.VAC = true;
}
StringBuilder versionInfo = new StringBuilder();
//Get the game version
while (buf[i] != 0x00)
{
versionInfo.Append((char)buf[i]);
i++;
}
//Move to the next byte
i++;
//Set the version
info.Version = versionInfo.ToString();
return(info);
}
/// <summary>
/// Pings the specified Source server to retreive information about it such as the server name, max players, current number of players, etc.
/// </summary>
/// <returns>Information about the server or throws an SSQLServerException if it could not be retreived</returns>
public ServerInfo Server()
{
//Create a new empty server info object
ServerInfo info = new ServerInfo();
//Create an empty buffer
byte[] buf = null;
//Create a new packet and request
Packet requestPacket = new Packet();
requestPacket.Data = "TSource Engine Query";
try
{
//Attempt to get the server info
buf = SocketUtils.getInfo(_ipEnd, requestPacket);
}
catch (SSQLServerException e)
{
throw e;
}
//Record the IP the packet came from
info.IP = _ipEnd.Address.ToString();
uint i = 0;
//Make sure the first character is an I
if (buf[i++] != 'I')
{
return(null);
}
//Make sure the returned version is above 0x07
if (buf[i++] < 0x07)
{
return(null);
}
//Set the name of the server
info.Name = ReadString(buf, ref i);
//Set the name of the map
info.Map = ReadString(buf, ref i);
//Get the short name for the game
info.Folder = ReadString(buf, ref i);
//Get the friendly game description
info.Game = ReadString(buf, ref i);
//read the appId of the game
var appID = ReadUint16(buf, ref i);
//Store the app id
info.AppID = appID.ToString();
//Get the number of players
info.PlayerCount = buf[i++].ToString();
//Get the number of max players
info.MaxPlayers = buf[i++].ToString();
//Get the number of bots
info.BotCount = buf[i++].ToString();
//Get the dedicated server type
if (buf[i] == 'l')
{
info.Dedicated = ServerInfo.DedicatedType.LISTEN;
}
else if (buf[i] == 'd')
{
info.Dedicated = ServerInfo.DedicatedType.DEDICATED;
}
else if (buf[i] == 'p')
{
info.Dedicated = ServerInfo.DedicatedType.SOURCETV;
}
//Move to the next byte
i++;
//Get the OS type
if (buf[i] == 'l')
{
info.OS = ServerInfo.OSType.LINUX;
}
else if (buf[i] == 'w')
{
info.OS = ServerInfo.OSType.WINDOWS;
}
//Move to the next byte
i++;
//Check for Password protection
if (buf[i++] == 0x01)
{
info.Password = true;
}
//Check for VAC
if (buf[i++] == 0x01)
{
info.VAC = true;
}
//Get the game version
info.Version = ReadString(buf, ref i);
//get EDF
uint edf = buf[i++];
if ((edf & 0x80) != 0) //has port number
{
ushort portNumber = ReadUint16(buf, ref i);
info.Port = portNumber.ToString();
}
if ((edf & 0x10) != 0) //has server SteamId
{
ulong serverSteamId = ReadUint64(buf, ref i);
info.SteamID = serverSteamId.ToString();
}
if ((edf & 0x40) != 0) //has spectator port number and name
{
//we currently arent storing these anywhere as they aren't needed
ushort sourceTvPort = ReadUint16(buf, ref i);
string sourceTvName = ReadString(buf, ref i);
}
if ((edf & 0x20) != 0) //has keywords
{
info.Keywords = ReadString(buf, ref i);
}
if ((edf & 0x01) != 0) //has higher precision GameID
{
ulong gameId = ReadUint64(buf, ref i);
ulong preciseAppId = gameId & 0xFFFFFF; //lower 24-bits contain the appId
info.AppID = preciseAppId.ToString();
}
//should be at the end of the packet now
return(info);
}
/// <summary>
/// Retreives information about the players on a Source server
/// </summary>
/// <param name="ip_end">The IPEndPoint object storing the IP address and port of the server</param>
/// <returns>An ArrayList of PlayerInfo or throws an SSQLServerException if the server could not be reached</returns>
public ArrayList Players(IPEndPoint ip_end)
{
//Create a new array list to store the player array
ArrayList players = new ArrayList();
//Create a new buffer to receive packets
byte[] buf = null;
//Create a challenge packet
byte[] challenge = new byte[9];
challenge[0] = (byte)0xff;
challenge[1] = (byte)0xff;
challenge[2] = (byte)0xff;
challenge[3] = (byte)0xff;
challenge[4] = (byte)0x55;
challenge[5] = (byte)0x00;
challenge[6] = (byte)0x00;
challenge[7] = (byte)0x00;
challenge[8] = (byte)0x00;
try
{
//Attempt to get the challenge response
buf = SocketUtils.getInfo(ip_end, challenge);
}
catch (SSQLServerException e)
{
throw e;
}
int i = 4;
//Make sure the response starts with A
if (buf[i++] != 'A')
{
return(null);
}
//Create the new request with the challenge number
byte[] requestPlayer = new byte[9];
requestPlayer[0] = (byte)0xff;
requestPlayer[1] = (byte)0xff;
requestPlayer[2] = (byte)0xff;
requestPlayer[3] = (byte)0xff;
requestPlayer[4] = (byte)0x55;
requestPlayer[5] = buf[i++];
requestPlayer[6] = buf[i++];
requestPlayer[7] = buf[i++];
requestPlayer[8] = buf[i++];
try
{
//Attempt to get the players response
buf = SocketUtils.getInfo(ip_end, requestPlayer);
}
catch (SSQLServerException)
{
return(null);
}
//Start past 0xffffffff
i = 4;
//Make sure the response starts with D
if (buf[i++] != 'D')
{
return(null);
}
//Get the amount of players
byte numPlayers = buf[i++];
//Loop through each player and extract their stats
for (int ii = 0; ii < numPlayers; ii++)
{
//Create a new player
PlayerInfo newPlayer = new PlayerInfo();
//Set the index of the player (Does not work in L4D2, always returns 0)
newPlayer.Index = buf[i++];
//Create a new player name
StringBuilder playerName = new StringBuilder();
//Loop through and store the player's name
while (buf[i] != 0x00)
{
playerName.Append((char)buf[i++]);
}
//Move past the end of the string
i++;
newPlayer.Name = playerName.ToString();
//Get the kills and store them in the player info
newPlayer.Kills = (int)(buf[i] & 255) | ((buf[i + 1] & 255) << 8) | ((buf[i + 2] & 255) << 16) | ((buf[i + 3] & 255) << 24);
//Move to the next item
i += 5;
//Get the time connected as a float and store it in the player info
newPlayer.Time = (float)((int)(buf[i] & 255) | ((buf[i + 1] & 255) << 8));
//Move past the float
i += 3;
//Add the player to the list
players.Add(newPlayer);
}
//Return the list of players
return(players);
}