private void ClientInitRequest(NetIncomingMessage inc)
{
DebugConsole.Log("Received client init request");
if (ConnectedClients.Find(c => c.Connection == inc.SenderConnection) != null)
{
//this client was already authenticated
//another init request means they didn't get any update packets yet
DebugConsole.Log("Client already connected, ignoring...");
return;
}
UnauthenticatedClient unauthClient = unauthenticatedClients.Find(uc => uc.Connection == inc.SenderConnection);
if (unauthClient == null)
{
//client did not ask for nonce first, can't authorize
inc.SenderConnection.Disconnect(DisconnectReason.AuthenticationRequired.ToString());
if (unauthClient.SteamID > 0)
{
Steam.SteamManager.StopAuthSession(unauthClient.SteamID);
}
return;
}
if (serverSettings.HasPassword && inc.SenderConnection != OwnerConnection)
{
//decrypt message and compare password
string clPw = inc.ReadString();
if (!serverSettings.IsPasswordCorrect(clPw, unauthClient.Nonce))
{
unauthClient.FailedAttempts++;
if (unauthClient.FailedAttempts > 3)
{
//disconnect and ban after too many failed attempts
serverSettings.BanList.BanPlayer("Unnamed", unauthClient.Connection.RemoteEndPoint.Address, "DisconnectMessage.TooManyFailedLogins", duration: null);
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.TooManyFailedLogins, "");
Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " has been banned from the server (too many wrong passwords)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " has been banned from the server (too many wrong passwords)", Color.Red);
return;
}
else
{
//not disconnecting the player here, because they'll still use the same connection and nonce if they try logging in again
NetOutgoingMessage reject = server.CreateMessage();
reject.Write((byte)ServerPacketHeader.AUTH_FAILURE);
reject.Write("Wrong password! You have " + Convert.ToString(4 - unauthClient.FailedAttempts) + " more attempts before you're banned from the server.");
Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " failed to join the server (incorrect password)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " failed to join the server (incorrect password)", Color.Red);
CompressOutgoingMessage(reject);
server.SendMessage(reject, unauthClient.Connection, NetDeliveryMethod.Unreliable);
unauthClient.AuthTimer = 10.0f;
return;
}
}
}
string clVersion = inc.ReadString();
UInt16 contentPackageCount = inc.ReadUInt16();
List <string> contentPackageNames = new List <string>();
List <string> contentPackageHashes = new List <string>();
for (int i = 0; i < contentPackageCount; i++)
{
string packageName = inc.ReadString();
string packageHash = inc.ReadString();
contentPackageNames.Add(packageName);
contentPackageHashes.Add(packageHash);
if (contentPackageCount == 0)
{
DebugConsole.Log("Client is using content package " +
(packageName ?? "null") + " (" + (packageHash ?? "null" + ")"));
}
}
if (contentPackageCount == 0)
{
DebugConsole.Log("Client did not list any content packages.");
}
string clName = Client.SanitizeName(inc.ReadString());
if (string.IsNullOrWhiteSpace(clName))
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NoName, "");
Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " couldn't join the server (no name given)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " couldn't join the server (no name given)", Color.Red);
return;
}
if (clVersion != GameMain.Version.ToString())
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.InvalidVersion,
$"DisconnectMessage.InvalidVersion~[version]={GameMain.Version.ToString()}~[clientversion]={clVersion}");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (wrong game version)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (wrong game version)", Color.Red);
return;
}
//check if the client is missing any of the content packages the server requires
List <ContentPackage> missingPackages = new List <ContentPackage>();
foreach (ContentPackage contentPackage in GameMain.SelectedPackages)
{
if (!contentPackage.HasMultiplayerIncompatibleContent)
{
continue;
}
bool packageFound = false;
for (int i = 0; i < contentPackageCount; i++)
{
if (contentPackageNames[i] == contentPackage.Name && contentPackageHashes[i] == contentPackage.MD5hash.Hash)
{
packageFound = true;
break;
}
}
if (!packageFound)
{
missingPackages.Add(contentPackage);
}
}
if (missingPackages.Count == 1)
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.MissingContentPackage, $"DisconnectMessage.MissingContentPackage~[missingcontentpackage]={GetPackageStr(missingPackages[0])}");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (missing content package " + GetPackageStr(missingPackages[0]) + ")", ServerLog.MessageType.Error);
return;
}
else if (missingPackages.Count > 1)
{
List <string> packageStrs = new List <string>();
missingPackages.ForEach(cp => packageStrs.Add(GetPackageStr(cp)));
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.MissingContentPackage, $"DisconnectMessage.MissingContentPackages~[missingcontentpackages]={string.Join(", ", packageStrs)}");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (missing content packages " + string.Join(", ", packageStrs) + ")", ServerLog.MessageType.Error);
return;
}
string GetPackageStr(ContentPackage contentPackage)
{
return("\"" + contentPackage.Name + "\" (hash " + contentPackage.MD5hash.ShortHash + ")");
}
//check if the client is using any contentpackages that are not compatible with the server
List <Pair <string, string> > incompatiblePackages = new List <Pair <string, string> >();
for (int i = 0; i < contentPackageNames.Count; i++)
{
if (!GameMain.Config.SelectedContentPackages.Any(cp => cp.Name == contentPackageNames[i] && cp.MD5hash.Hash == contentPackageHashes[i]))
{
incompatiblePackages.Add(new Pair <string, string>(contentPackageNames[i], contentPackageHashes[i]));
}
}
if (incompatiblePackages.Count == 1)
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.IncompatibleContentPackage,
$"DisconnectMessage.IncompatibleContentPackage~[incompatiblecontentpackage]={GetPackageStr2(incompatiblePackages[0])}");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (incompatible content package " + GetPackageStr2(incompatiblePackages[0]) + ")", ServerLog.MessageType.Error);
return;
}
else if (incompatiblePackages.Count > 1)
{
List <string> packageStrs = new List <string>();
incompatiblePackages.ForEach(cp => packageStrs.Add(GetPackageStr2(cp)));
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.IncompatibleContentPackage,
$"DisconnectMessage.IncompatibleContentPackages~[incompatiblecontentpackages]={string.Join(", ", packageStrs)}");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (incompatible content packages " + string.Join(", ", packageStrs) + ")", ServerLog.MessageType.Error);
return;
}
string GetPackageStr2(Pair <string, string> nameAndHash)
{
return("\"" + nameAndHash.First + "\" (hash " + Md5Hash.GetShortHash(nameAndHash.Second) + ")");
}
if (!serverSettings.Whitelist.IsWhiteListed(clName, inc.SenderConnection.RemoteEndPoint.Address))
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NotOnWhitelist, "");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (not in whitelist)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (not in whitelist)", Color.Red);
return;
}
if (!Client.IsValidName(clName, this))
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.InvalidName, "");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (invalid name)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (invalid name)", Color.Red);
return;
}
if (inc.SenderConnection != OwnerConnection && Homoglyphs.Compare(clName.ToLower(), Name.ToLower()))
{
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NameTaken, "");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name taken by the server)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name taken by the server)", Color.Red);
return;
}
Client nameTaken = ConnectedClients.Find(c => Homoglyphs.Compare(c.Name.ToLower(), clName.ToLower()));
if (nameTaken != null)
{
if (nameTaken.Connection.RemoteEndPoint.Address.ToString() == inc.SenderEndPoint.Address.ToString())
{
//both name and IP address match, replace this player's connection
nameTaken.Connection.Disconnect(DisconnectReason.SessionTaken.ToString());
nameTaken.Connection = unauthClient.Connection;
nameTaken.InitClientSync(); //reinitialize sync ids because this is a new connection
unauthenticatedClients.Remove(unauthClient);
unauthClient = null;
return;
}
else
{
//can't authorize this client
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NameTaken, "");
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name already taken)", ServerLog.MessageType.Error);
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name already taken)", Color.Red);
return;
}
}
//new client
Client newClient = new Client(clName, GetNewClientID());
newClient.InitClientSync();
newClient.Connection = unauthClient.Connection;
newClient.SteamID = unauthClient.SteamID;
unauthenticatedClients.Remove(unauthClient);
unauthClient = null;
ConnectedClients.Add(newClient);
LastClientListUpdateID++;
if (newClient.Connection == OwnerConnection)
{
newClient.GivePermission(ClientPermissions.All);
newClient.PermittedConsoleCommands.AddRange(DebugConsole.Commands);
GameMain.Server.UpdateClientPermissions(newClient);
GameMain.Server.SendConsoleMessage("Granted all permissions to " + newClient.Name + ".", newClient);
}
GameMain.Server.SendChatMessage($"ServerMessage.JoinedServer~[client]={clName}", ChatMessageType.Server, null);
var savedPermissions = serverSettings.ClientPermissions.Find(cp =>
cp.SteamID > 0 ?
cp.SteamID == newClient.SteamID :
newClient.IPMatches(cp.IP));
if (savedPermissions != null)
{
newClient.SetPermissions(savedPermissions.Permissions, savedPermissions.PermittedCommands);
}
else
{
newClient.SetPermissions(ClientPermissions.None, new List <DebugConsole.Command>());
}
}
protected string GetPackageStr(ServerContentPackage contentPackage)
{
return("\"" + contentPackage.Name + "\" (hash " + Md5Hash.GetShortHash(contentPackage.Hash) + ")");
}
protected string GetPackageStr(ServerContentPackage contentPackage)
{
return($"\"{contentPackage.Name}\" (hash {Md5Hash.GetShortHash(contentPackage.Hash)})");
}