/// <summary>
/// Send updated MD5 data to the server
/// </summary>
/// <param name="updates">List of MD5 data to send</param>
public virtual void SendMD5Updates(List <MD5Entry> updates)
{
MasterServer.Log("[{0}] Updating MD5 database to revision {1}", server, md5Manager.maxRevision);
int index = 0;
while (index < updates.Count)
{
int updatesInPacket = Math.Min(updates.Count - index, Protocol.MAX_MD5_UPDATES_PER_PACKET);
OutboundPacket MD5UpdatePacket = new OutboundPacket((byte)MasterToServer.MD5Update);
MD5UpdatePacket.Append((byte)updatesInPacket);
for (int offset = 0; offset < updatesInPacket; offset++)
{
MD5UpdatePacket.Append(updates[index + offset].PackageGUID);
MD5UpdatePacket.Append(updates[index + offset].PackageMD5);
MD5UpdatePacket.Append(updates[index + offset].Revision);
}
ConnectionLog("SENDING MTS_MD5UPDATE COUNT={0}", updatesInPacket);
Send(MD5UpdatePacket);
index += updatesInPacket;
}
}
/// <summary>
/// Client has queried the server list
/// </summary>
/// <param name="clientRequest"></param>
private void HandleQuery(InboundPacket clientRequest)
{
// Query arrives as an array of QueryData structs
QueryData[] queries = clientRequest.PopStructArray <QueryData>();
// Write query to log and notify master server for stats
LogQuery(queries);
// Get a filtered list of servers based on the queries which were receieved
List <Server> servers = serverList.Query(queries);
// Server count is the first reply following the query and tells the player how many servers to expect
OutboundPacket serverCountPacket = new OutboundPacket();
serverCountPacket.Append(servers.Count);
serverCountPacket.Append((byte)0x01);
Send(serverCountPacket);
// Send server list if any were found
if (servers.Count > 0)
{
foreach (Server server in servers)
{
OutboundPacket serverListPacket = new OutboundPacket();
serverListPacket.AppendStruct <ServerListEntry>(server.ListEntry);
Send(serverListPacket);
}
}
}
/// <summary>
/// Try to login with the specified details and get the response
/// </summary>
/// <param name="cdKey">CD key hash for login</param>
/// <param name="saltedKey">Salted key hash for login</param>
/// <param name="type">Remote client type (eg. CLIENT or SERVER)</param>
/// <param name="version">Remote client version</param>
/// <param name="locale">Remote client locale</param>
/// <returns>Login response from the server</returns>
public string Login(string cdKey, string saltedKey, string type, int version, string locale)
{
string response = Protocol.LOGIN_RESPONSE_DENIED;
if (!connectionError)
{
try
{
OutboundPacket login = new OutboundPacket();
login.Append(cdKey).Append(saltedKey).Append(type).Append(version);
if (type == Protocol.HOST_SERVER)
{
login.Append(-1); // stats enabled flag for server
}
login.Append((byte)0x04).Append(locale);
Send(login);
InboundPacket loginResponse = Receive();
response = loginResponse.PopString();
}
catch
{
connectionError = true;
}
}
Close();
return(response);
}
public void Send(OutboundPacket packet)
{
Log.Verbose("Sending {rawPacket}", packet.Raw);
Log.Debug("<- {packet}", packet);
Connection?.Send(Encoding.ASCII.GetBytes(packet.Raw));
}
/// <summary>
/// Send the specified outbound packet to the socket
/// </summary>
/// <param name="packet"></param>
protected virtual void Send(OutboundPacket packet)
{
if (packet != null && packet.Type == OutboundPacketType.TCP && packet.Length > 0 && socket != null && socket.Connected)
{
socket.Send(packet);
}
}
/// <summary>
/// Check INI option on the remote server, remote server will reply with STM_CheckOptionReply
/// </summary>
/// <param name="packageName">Name of package and group</param>
/// <param name="variableName">Variable name</param>
public virtual void CheckOption(string packageName, string variableName)
{
OutboundPacket CheckOptionPacket = new OutboundPacket((byte)MasterToServer.CheckOption);
CheckOptionPacket.Append(packageName);
CheckOptionPacket.Append(variableName);
Send(CheckOptionPacket);
}
/// <summary>
/// Set the remote server's match ID
/// </summary>
/// <param name="MatchID">Match ID to set on the remote server</param>
public virtual void SendMatchID(int MatchID)
{
ConnectionLog("ASSIGNING MATCH ID {0}", MatchID);
OutboundPacket MatchIDPacket = new OutboundPacket((byte)MasterToServer.MatchID);
MatchIDPacket.Append(MatchID);
Send(MatchIDPacket);
}
/// <summary>
/// Set INI file option on the remote server
/// </summary>
/// <param name="packageName">Name of package and group</param>
/// <param name="variableName">Variable name</param>
/// <param name="value">Value to set</param>
public virtual void SetOption(string packageName, string variableName, string value)
{
OutboundPacket SetOptionPacket = new OutboundPacket((byte)MasterToServer.UpdateOption);
SetOptionPacket.Append(packageName);
SetOptionPacket.Append(variableName);
SetOptionPacket.Append(value);
Send(SetOptionPacket);
}
/// <summary>
/// Receieved all heartbeats okay, send acknowledgment to server
/// </summary>
/// <param name="unknown">Not sure what this value is for, seems to always be 120</param>
protected virtual void SendHeartbeatAcknowledgment(int unknown)
{
OutboundPacket HeartbeatExitPacket = new OutboundPacket(Protocol.HEARTBEAT_RESPONSE_CMD);
HeartbeatExitPacket.Append(unknown); // Always 120 ?
HeartbeatExitPacket.Append(server.QueryPort);
HeartbeatExitPacket.Append(server.Port);
HeartbeatExitPacket.Append(server.GamespyQueryPort);
Send(HeartbeatExitPacket);
}
/// <summary>
/// Disconnect the specified player (eg. because of failed challenge or invalid CD key)
/// </summary>
/// <param name="clientAddress">Address of the player to disconnect, in IP:port notation</param>
public virtual void DisconnectClient(string clientAddress)
{
ConnectionLog("SENDING MTS_CLIENTAUTHFAILED CLIENT={0}", clientAddress);
MasterServer.Log("[{0}] Sending MTS_ClientAuthFailed to {1}", server, clientAddress);
OutboundPacket DisconnectClientPacket = new OutboundPacket((byte)MasterToServer.ClientAuthFailed);
DisconnectClientPacket.Append(clientAddress);
Send(DisconnectClientPacket);
}
/// <summary>
/// Send a packet to a remote host
/// </summary>
/// <param name="udp">UDP client to use</param>
/// <param name="packet">Packet to send</param>
protected virtual void Send(UdpClient udp, OutboundPacket packet)
{
if (packet != null && packet.Type == OutboundPacketType.UDP && packet.Length > 0 && udp != null && remoteEndpoint != null)
{
udp.Send(packet, packet.FullLength, remoteEndpoint);
}
else
{
throw new ArgumentException("Cannot send a null, empty, or TCP packet on a UDP socket");
}
}
/// <summary>
/// Master server requests heartbeat blah with code blah
/// </summary>
/// <param name="type">Type of heartbeat to request</param>
/// <param name="code">Heartbeat code to request</param>
protected virtual void SendHeartbeatRequest(HeartbeatType type, int code)
{
if (State == ConnectionState.WaitingHello)
{
OutboundPacket HeartbeatPacket = new OutboundPacket();
HeartbeatPacket.Append(Protocol.HEARTBEAT_CMD);
HeartbeatPacket.Append((byte)type);
HeartbeatPacket.Append(code);
waitingHearbeats.Add(type);
Send(HeartbeatPacket);
}
}
/// <summary>
/// Client has requested the MOTD
/// </summary>
/// <param name="clientRequest"></param>
private void HandleMOTDRequest(InboundPacket clientRequest)
{
ConnectionLog("SENDING MOTD");
// Response packet contains the MOTD string
OutboundPacket MOTD = new OutboundPacket(MasterServer.GetMOTD(locale, true));
// Send the MR_OptionalUpgrade value if this connection is valid but player is an outdated version
if (outerConnection.Version < Protocol.OPTIONALUPGRADE_VERSION)
{
MOTD.Append(Protocol.OPTIONALUPGRADE_VERSION);
}
// Send the MOTD packet
Send(MOTD);
}
/// <summary>
/// Challenge the specified player to return its CD key and the salted CD key
/// </summary>
/// <param name="clientAddress">Address of the player to challenge, in IP:port notation</param>
public virtual void ChallengeClient(string clientAddress)
{
if (clientAddress != "" && clientAddress != "local")
{
ConnectionLog("SENDING MTS_CLIENTCHALLENGE CLIENT={0}", clientAddress);
MasterServer.Log("[{0}] Sending MTS_ClientChallenge to {1}", server, clientAddress);
ValidationContext clientValidationContext = cdKeyValidator.BeginValidation(clientAddress);
validationContexts[clientAddress] = clientValidationContext;
OutboundPacket ChallengeClientPacket = new OutboundPacket((byte)MasterToServer.ClientChallenge);
ChallengeClientPacket.Append(clientAddress);
ChallengeClientPacket.Append(clientValidationContext.Salt.ToString());
Send(ChallengeClientPacket);
}
else
{
MasterServer.Log("Unable to send MTS_ClientChallenge. Cannot challenge local player");
}
}
/// <summary>
/// Thread function where the query is actually executed. The call to Receive() is blocking and the
/// separate timer thread takes care of the timeout behaviour (if specified)
/// </summary>
private void QueryThreadProc(object oQueryState)
{
UDPServerQueryState queryState = (UDPServerQueryState)oQueryState;
try
{
// Send the query to the server
OutboundPacket query = new OutboundPacket(true);
query.Append((byte)queryState.QueryType);
Send(queryState.QueryClient, query);
// Wait for a response from the server
UDPPacket queryResponse = Receive(queryState.QueryClient);
// Stop the timeout timer
queryState.End();
if (queryState.QueryResponse == UDPServerQueryResponse.None)
{
queryState.QueryResponse = UDPServerQueryResponse.Success;
OnQueryFinished(queryState, queryResponse);
}
}
catch (ThreadAbortException) { }
catch (Exception)
{
if (queryState.QueryResponse != UDPServerQueryResponse.Timeout)
{
queryState.QueryResponse = UDPServerQueryResponse.Error;
// Stop the timeout timer
queryState.End();
OnQueryFinished(queryState, null);
}
}
lock (activeQueryLock)
{
activeQueries.Remove(queryState);
}
}
/// <summary>
/// Poke raw data down the connection, used for testing purposes
/// </summary>
/// <param name="command"></param>
public void Poke(string[] command)
{
OutboundPacket ob = new OutboundPacket();
byte b = 0x00;
for (int i = 1; i < command.Length; i++)
{
if (byte.TryParse(command[i], out b))
{
ob.Append(b);
}
else
{
ob.Append(command[i]);
}
}
ConnectionLog("POKE {0}", ob.Print());
Send(ob);
}
/// <summary>
/// Send the updated MS list to the remote client
/// </summary>
/// <returns>True if the packet was sent ok</returns>
protected virtual bool SendMSList()
{
// Check whether we should send the MSLIST message on this port
if (MSListEnabled)
{
// Calculate the number of entries we need to send
int msListEntryCount = Math.Min(Math.Min(MasterServer.Settings.MSListServers.Length, MasterServer.Settings.MSListPorts.Length), MasterServer.Settings.MSListMaxServers);
// Only send the list if there are entries to send
if (msListEntryCount > 0)
{
ConnectionLog("{0} COUNT={1}", Protocol.LOGIN_RESPONSE_MSLIST, msListEntryCount);
// Create MSLIST packet
OutboundPacket msListPacket = new OutboundPacket(Protocol.LOGIN_RESPONSE_MSLIST);
// Append server addresses
msListPacket.Append((byte)msListEntryCount);
for (int entry = 0; entry < msListEntryCount; entry++)
{
msListPacket.Append(MasterServer.Settings.MSListServers[entry]);
}
// Append server ports
msListPacket.Append((byte)msListEntryCount);
for (int entry = 0; entry < msListEntryCount; entry++)
{
msListPacket.Append((int)MasterServer.Settings.MSListPorts[entry]);
}
// Send packet to the remote host
Send(msListPacket);
return(true);
}
}
return(false);
}
/// <summary>
/// Handle the connection
/// </summary>
protected virtual void Handle()
{
try
{
// Initialise validation context for this session
validationContext = cdKeyValidator.BeginValidation("login");
// Log the new connection to the connection log
ConnectionLog("ACCEPT LOCALPORT={0} SALT={1}", LocalPort, cdKeyValidator.GetSalt(validationContext));
// Send the challenge salt
Send(cdKeyValidator.GetSalt(validationContext).ToString());
// Read back the authentication from the player
InboundPacket login = Receive();
cdKey = login.PopString(); // Get the first MD5 which should be the CD key hash
saltedCDKey = login.PopString(); // Get the second MD5 which should be the CD key plus salt hash
type = login.PopString(); // Type of client eg. CLIENT or SERVER
version = login.PopInt(); // Client's engine version
// Write the login info to the connection log
ConnectionLog("CONNECT MD5={0} SALTED={1} TYPE={2} VERSION={3}", cdKey, saltedCDKey, type, version);
// Set values into the validation context
validationContext.SetClientInfo(cdKey, saltedCDKey, type, version);
// Check the CD key
if (Validate(validationContext))
{
if (version < Protocol.MIN_SUPPORTED_CLIENT_VERSION)
{
ConnectionLog(Protocol.LOGIN_RESPONSE_UPGRADE);
MasterServer.Log("{0} at {1} rejected, outdated version: got {2}", type, (socket.RemoteEndPoint as IPEndPoint).Address.ToString(), version);
// This is my best guess for how an UPGRADE packet should be structured, if it's wrong it seems to crash the client
OutboundPacket UpgradePacket = new OutboundPacket(Protocol.LOGIN_RESPONSE_UPGRADE);
UpgradePacket.Append(Protocol.MIN_SUPPORTED_CLIENT_VERSION);
UpgradePacket.Append(0x00);
// Send the UPGRADE response
Send(UpgradePacket);
}
else
{
// Send MSLIST packet if enabled, if the MSLIST is sent successfully then close the
// connection (SendMSList() returns true if the MSLIST was sent)
if (!SendMSList())
{
switch (type)
{
case Protocol.HOST_CLIENT: HandleClientConnection(login); break;
case Protocol.HOST_SERVER: HandleServerConnection(login); break;
default: HandleUnknownConnection(login); break;
}
}
}
}
}
catch (ThreadAbortException)
{
aborted = true;
}
catch (Exception ex)
{
ConnectionLog("EXCEPTION: {0}", ex.Message);
}
try
{
socket.Close();
}
catch { }
ConnectionLog("CLOSED");
ConnectionThreadManager.Remove(Thread.CurrentThread);
ConnectionManager.DeRegister(this);
}