private void OnRequestIntroducerIntroductionMessageReceived(UnconnectedMessageEventArgs <RequestIntroducerIntroductionMessage> e)
{
// First assign the client machine (the sender) its IPEndPoint, for introducting, later, or for the ban
e.Message.ClientMachine.PublicEndPoint = e.From;
// We want to introduce this machine with the target server machine
// First, we check if this client machine is banned
if (MachineBanTable.IdExists(e.Message.ClientMachine))
{
// It is banned - get the amount of time left
DateTime paroleDateTime = MachineBanTable.Get(e.Message.ClientMachine);
// Client is still banned
if (DateTime.Now < paroleDateTime)
{
// Tell him bye bye
Network.SendUnconnectedMessage(
new ResponseIntroducerIntroductionCompletedMessage {
ResponseResult = ResponseIntroducerIntroductionCompletedMessage.Result.Denied, DenyReason = ResponseIntroducerIntroductionCompletedMessage.Reason.Banned
},
e.From);
return;
}
else
{
// Ban time is up - client is free to reconnect again
MachineBanTable.Remove(e.Message.ClientMachine);
}
}
// Client is not banned, so we check the password hash to make sure it matches the server's
var retrievedServerMachine = MachineLookupTable.GetMachineById(e.Message.ServerMachine.NovaId);
if (retrievedServerMachine == null)
{
// todo later
return;
}
string correctPasswordHash = retrievedServerMachine.Machine.PasswordHash;
// Password hash doesn't match - client entered wrong password
if (e.Message.ServerMachine.PasswordHash != correctPasswordHash)
{
// Tell him bye bye
Network.SendUnconnectedMessage(
new ResponseIntroducerIntroductionCompletedMessage {
ResponseResult = ResponseIntroducerIntroductionCompletedMessage.Result.Denied, DenyReason = ResponseIntroducerIntroductionCompletedMessage.Reason.WrongPassword
},
e.From);
retrievedServerMachine.NumConnectionAttempts++;
if (OnWrongPassword != null)
{
OnWrongPassword(this, new WrongPasswordEventArgs()
{
NumConnectionAttempts = retrievedServerMachine.NumConnectionAttempts, OffendingMachine = e.Message.ClientMachine, TargetMachine = retrievedServerMachine.Machine
});
}
// Number of client connection attempts exceeds allowed value
if (retrievedServerMachine.NumConnectionAttempts > Config.GetInt("MaxNumConnectionAttemptsPerMachine", 3))
{
// Banned :D
MachineBanTable.Add(e.Message.ClientMachine, DateTime.Now.AddSeconds(Config.GetDouble("BanTime", 60.0)));
if (OnMachineBanned != null)
{
OnMachineBanned(this, new MachineBannedEventArgs()
{
BannedMachine = e.Message.ClientMachine, NumConnectionAttempts = retrievedServerMachine.NumConnectionAttempts
});
}
}
}
else
{
// If the password hash is correct, introduce the two machines
// First we need to set the private and public endpoints of the Client and Server
Network.Introduce(e.Message.ClientMachine, retrievedServerMachine.Machine);
NumMachinesIntroduced++;
Network.SendUnconnectedMessage(
new ResponseIntroducerIntroductionCompletedMessage {
ResponseResult = ResponseIntroducerIntroductionCompletedMessage.Result.Allowed
},
e.From);
if (OnIntroductionCompleted != null)
{
OnIntroductionCompleted(this,
new IntroductionCompletedEventArgs {
ClientMachine = e.Message.ClientMachine, ServerMachine = retrievedServerMachine.Machine
});
}
}
}
public NovaProvider(NetworkPeer network)
: base(network)
{
MachineLookupTable = new MachineLookupTable();
MachineBanTable = new MachineBanTable();
}
