public static void NotVerifiedRecieve(ClientInstance instance, byte[] bytes)
{
string messageFormatted = Common.ReturnEndOfStream(Encoding.ASCII.GetString(bytes));
List <ConnectionMessageFormat> list = Serialization.DeserializeConnectionMessageFormat(messageFormatted);
int clientID = NextAvailableClientID();
// Add this client to NetStreams to keep track of connection.
ServerHandler.activeClients.Add(new ClientList
{
ID = clientID,
ChannelID = ServerConfigFormat.serverChosenDefaultChannelID,
TCPClient = instance.client,
Username = list[0].Username,
RSAExponent = list[0].RSAExponent,
RSAModulus = list[0].RSAModulus,
UsernameColor = list[0].UserNameColor
});
if (ServerConfigFormat.serverChosenVersionCheck)
{
// Check if server and client versions are the same before continuing.
if (!VersionHandler.VersionCheck(instance, list[0].ClientVersion))
{
// Remove the item just added to active clients.
// The reason it is added before is to have a list to index when sending server message to.
ServerHandler.activeClients.RemoveAt(ServerHandler.activeClients.Count - 1);
return;
}
}
string message = String.Format("({0}) {1} connected.", clientID, list[0].Username);
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, message);
instance.clientVerified = true;
List <WelcomeMessageFormat> welcomeMessage = new();
welcomeMessage.Add(new WelcomeMessageFormat
{
MessageType = MessageTypes.WELCOME,
ConnectMessage = ServerConfigFormat.serverChosenWelcomeMessage,
ServerName = ServerConfigFormat.serverChosenName,
RSAExponent = Encryption.RSAExponent,
RSAModulus = Encryption.RSAModulus,
ServerVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString(),
ClientID = clientID,
DefaultChannelID = ServerConfigFormat.serverChosenDefaultChannelID
});
Serialize(welcomeMessage, instance, false);
}
public static void ClientRequestsChannelSwitch(ClientInstance instance, string parameters)
{
bool parse = int.TryParse(parameters, out int outNum);
int index = ServerMessage.FindClientKeysIndex(instance.client);
// If client has sent an invalid id.
if (!parse)
{
// Simply send back the users current channel id, which has not changed.
CommandHandler.ReplyToDataRequest(instance, ServerHandler.activeClients[index].ChannelID.ToString(), CommandDataTypes.CHANNELSWITCH);
return;
}
// Check if the client's requested new channel id actually exists.
bool foundID = false;
for (int i = 0; i < serverChannels.Count; i++)
{
if (serverChannels[i].ID == outNum)
{
foundID = true;
}
}
if (!foundID)
{
// Simply send back the users current channel id, which has not changed.
CommandHandler.ReplyToDataRequest(instance, ServerHandler.activeClients[index].ChannelID.ToString(), CommandDataTypes.CHANNELSWITCH);
return;
}
// Check if client is trying to switch to the channel they are currently in.
if (ServerHandler.activeClients[index].ChannelID == outNum)
{
// Simply send back the users current channel id, which has not changed.
CommandHandler.ReplyToDataRequest(instance, ServerHandler.activeClients[index].ChannelID.ToString(), CommandDataTypes.CHANNELSWITCH);
return;
}
ServerHandler.activeClients[index].ChannelID = outNum;
CommandHandler.ReplyToDataRequest(instance, outNum.ToString(), CommandDataTypes.CHANNELSWITCH);
string message = String.Format("({0}) {1} switched channel to: {2}", ServerHandler.activeClients[index].ID, ServerHandler.activeClients[index].Username, outNum.ToString());
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, message);
}
public static void Execute()
{
for (int i = 0; i < ServerHandler.activeClients.Count; i++)
{
bool parse = int.TryParse(Commands.CommandArguments[0], out int outNum);
if (parse && ServerHandler.activeClients[i].ID == outNum)
{
string message = String.Format("({0}) {1} has been kicked.", ServerHandler.activeClients[i].ID, ServerHandler.activeClients[i].Username);
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, message);
// Try / catch as an out of range solution.
try
{
ServerHandler.activeClients[i].TCPClient.Close();
}
catch (ArgumentOutOfRangeException) { }
return;
}
}
}
public static void VerifiedRecieve(ClientInstance instance, byte[] bytes)
{
// Random CryptographicException that i am not able to replicate
// TODO Investigate reason for exception.
string message = "";
try
{
message = Encryption.DecryptMessageData(bytes);
}
catch (CryptographicException)
{
int index = ServerMessage.FindClientKeysIndex(instance.client);
string serverMessage = String.Format("{0} Was kicked due to a cryptography error.", ServerHandler.activeClients[index].Username);
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, serverMessage);
instance.client.Close();
}
string messageFormatted = Common.ReturnEndOfStream(message);
byte[] messageBytes = Encoding.ASCII.GetBytes(messageFormatted);
List <MessageFormat> messageList;
switch (Common.ReturnMessageType(messageBytes))
{
case MessageTypes.MESSAGE:
int index = ServerMessage.FindClientKeysIndex(instance.client);
// Error when deserializing message.
// Could mean corrupt or icorrect data has been transmitted.
try
{
messageList = Serialization.DeserializeMessageFormat(messageFormatted);
List <MessageReplyFormat> replyFormat = new();
replyFormat.Add(new MessageReplyFormat
{
MessageType = MessageTypes.MESSAGEREPLY,
Message = messageList[0].Message,
ID = ServerHandler.activeClients[index].ID,
Username = ServerHandler.activeClients[index].Username,
UsernameColor = ServerHandler.activeClients[index].UsernameColor,
});
ConsoleOutput.RecievedMessageReplyFormat(replyFormat, ServerHandler.activeClients[index].ChannelID);
// Encrypts the message and sends it to all clients.
RepeatToAllClientsInChannel(replyFormat, instance);
}
catch (JsonException)
{
string serverMessage = String.Format("({0}) {1} Was kicked due to an invalid message.", ServerHandler.activeClients[index].ID, ServerHandler.activeClients[index].Username);
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, serverMessage);
instance.client.Close();
}
break;
case MessageTypes.DATAREQUEST:
List <DataRequestFormat> dataList = Serialization.DeserializeDataRequestFormat(messageFormatted);
CommandHandler.RecievedDataRequest(instance, dataList);
break;
}
}
public static void Execute()
{
ServerMessage.ServerGlobalMessage(ConsoleColor.Yellow, Commands.CommandArguments[0]);
}