void newSession_Disconnect_Event(object sender, EventArgs e)
{
ITelnetProxySessionControl session = (ITelnetProxySessionControl)sender;
m_sessions.Remove(session.GetId);
session.Dispose();
}
//private static int AttachListenerToSession(int id, ITelnetProxySessionControl newSession, ITelnetProxySessionControl existingSession)
//{
// int result = -1;
// if (!existingSession.AttachListener(ETelnetProxySession.Remote, newSession))
// {
// Debug.WriteLine("Failed to attach listner to Session " + result, DBG_CAT);
// }
// if (!newSession.AttachListener(ETelnetProxySession.Client, existingSession))
// {
// Debug.WriteLine("Failed to attach writer to Session " + result, DBG_CAT);
// }
// return 1;
//}
private int CreateNewSessionScript(ITelnetProxySessionControl newProxySession)
{
Match m = BlockUntilAnswered(newProxySession, ETelnetProxySession.Client, "CON?", csvRegex_new, 5, 5);
if (m == null && !m.Success)
{
return(BAD_ID_REGEX);
}
string ip = m.Groups[1].Value;
int port = -1;
if (!int.TryParse(m.Groups[2].Value, out port))
{
return(ID_BAD_PORT_CAST_TO_INT);
}
try
{
System.Net.IPHostEntry entry = System.Net.Dns.GetHostEntry(ip);
if (entry.AddressList.Length == 0)
{
Debug.WriteLine("Failed to resolve: " + ip, "StartScript");
return(BAD_ID);
}
ip = entry.AddressList[0].ToString();
}
catch (Exception)
{
Debug.WriteLine("Failed to parse ip or port from: " + ip + " " + port, "StartScript");
return(BAD_ID);
}
ITelnetSessionControl remoteSession = new TelnetSession(ip, port);
remoteSession.Name = "Remote";
if (!remoteSession.Connect())
{
Debug.WriteLine("Failed to connected to Remote Server");
return(BAD_REMOTE_CONNECTION);
}
newProxySession.AddSession(ETelnetProxySession.Remote, remoteSession);
remoteSession.BeginRead();
return(1);
}
private Match BlockUntilAnswered(ITelnetProxySessionControl newProxySession, ETelnetProxySession eTelnetProxySession,
string p1, string csvRegex_new, int p2, int p3)
{
switch (eTelnetProxySession)
{
case ETelnetProxySession.Client:
return(BlockUntilAnswered(newProxySession.ClientSession, p1, csvRegex_new, p2, p3));
case ETelnetProxySession.Remote:
return(BlockUntilAnswered(newProxySession.RemoteSession, p1, csvRegex_new, p2, p3));
case ETelnetProxySession.Tap:
return(BlockUntilAnswered(newProxySession.TapSession, p1, csvRegex_new, p2, p3));
default:
Debug.WriteLine("Bad switch Block Until Answered");
break;
}
return(Match.Empty);
}
//when someone connects to the listener this will send Action?
// possible Action
// CON - Format would be CON,<ip|hostname>,port
// LISTEN - Format would be LISTEN
/// <summary>
/// Prompts the local client for remote info and connects the streams
/// </summary>
/// <param name="newTelnetSession"></param>
/// <returns>int -1 fail, 0 means a lister succesfully attached to a session, > 0 is a new session id</returns>
public int Start(ITelnetSessionControl newTelnetSession, Dictionary <int, ITelnetProxySessionControl> sessions)
{
Debug.WriteLine("Starting New connection script");
int type, id, result = 0;
lock (m_lock) {
//connect to event when the new session talks to us
newTelnetSession.Receive_Event += ClientRcvdDataEventHandler;
newTelnetSession.BeginRead();
//ID,0,<num> - Listen to <num>
//ID,1,<num> - Create new session called <num>
//start the sequence
Match m = BlockUntilAnswered(newTelnetSession, "ID?", csvRegex_id, 5, 5);
if (m == null || !m.Success)
{
return(BAD_ID_REGEX);
}
if (!int.TryParse(m.Groups[1].Value, out type))
{
return(BAD_ID_NON_INT);
}
if (!int.TryParse(m.Groups[2].Value, out id))
{
return(BAD_ID_NON_INT);
}
string s = "";
int res = id;
if (type == ID_LISTENER)
{
newTelnetSession.Name = "Tap";
if (!sessions.ContainsKey(id))
{
s = "Invalid ID, ID not found: " + id;
res = -1;
}
else
{
ITelnetProxySessionControl proxySession = sessions[id];
proxySession.AddSession(ETelnetProxySession.Tap, newTelnetSession);
s = "Tap added to session: " + id;
}
}
else if (type == ID_NEWSESSION)
{
newTelnetSession.Name = "Client";
if (sessions.ContainsKey(id))
{
s = "Session ID already active: " + id;
}
else
{
ITelnetProxySessionControl newProxySession = new TelnetProxySession(newTelnetSession, id);
int res2 = CreateNewSessionScript(newProxySession);
if (res2 != 1)
{
s = "Failed to create new remote Session: " + res;
res = res2;
}
else
{
sessions.Add(id, newProxySession);
s = "New Session Created: " + id;
}
}
}
else
{
s = "Invalid Type -> " + type;
res = BAD_ID_TYPE;
}
Debug.WriteLine("Start - New Telnet session - " + s);
newTelnetSession.SendToRemote(Encoding.ASCII.GetBytes(s));
if (res < 0)
{
newTelnetSession.Disconnect();
}
else
{
newTelnetSession.Receive_Event -= ClientRcvdDataEventHandler;
}
result = res;
}
return(result);
}
