internal static byte[] getInfo(IPEndPoint ipe, Packet packet)
{
//Create the socket
Socket srvSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//Save the max packet size
int packetSize = 12288;
//Send/Receive timeouts
srvSocket.SendTimeout = 3000;
srvSocket.ReceiveTimeout = 3000;
try
{
//Send the request to the server
srvSocket.SendTo(packet.outputAsBytes(), ipe);
}
catch (SocketException se)
{
throw new SSQLServerException("Could not send packet to server {" + se.Message + "}");
}
//Create a new receive buffer
byte[] rcvPacketInfo = new byte[packetSize];
EndPoint Remote = (EndPoint)ipe;
int recvdBytes = -1;
try
{
//Receive the data from the server
recvdBytes = srvSocket.ReceiveFrom(rcvPacketInfo, ref Remote);
}
catch (SocketException se)
{
throw new SSQLServerException("Could not receive packet from server {" + se.Message + "}");
}
if (recvdBytes < sizeof(uint))
return null;
uint headerInt = BitConverter.ToUInt32(rcvPacketInfo, 0);
if (headerInt != 0xFFFFFFFF) //we only support simple non-split packets for this query
return null;
int realDataSize = recvdBytes - sizeof(uint);
//Send the packet data back
byte[] retnData = new byte[realDataSize];
Array.Copy(rcvPacketInfo, sizeof(uint), retnData, 0, realDataSize);
return retnData;
}
internal static byte[] getInfo(IPEndPoint ipe, Packet packet)
{
//Create the socket
Socket srvSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//Save the max packet size
int packetSize = 12288;
//Send/Receive timeouts
srvSocket.SendTimeout = 3000;
srvSocket.ReceiveTimeout = 3000;
try
{
//Send the request to the server
srvSocket.SendTo(packet.outputAsBytes(), ipe);
}
catch (SocketException se)
{
throw new SSQLServerException("Could not send packet to server {" + se.Message + "}");
}
//Create a new receive buffer
byte[] rcvPacketInfo = new byte[packetSize];
EndPoint Remote = (EndPoint)ipe;
try
{
//Receive the data from the server
srvSocket.ReceiveFrom(rcvPacketInfo, ref Remote);
}
catch (SocketException se)
{
throw new SSQLServerException("Could not receive packet from server {" + se.Message + "}");
}
//Send the information back
return rcvPacketInfo;
}
/// <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;
}