Re: Newcomer's CAsyncSocket example: trouble connecting with other clients

Stephen,

It does work. That is why I gave you other host names and ports to try
it. Its a simple "Dump Terminal" client application.

Not sure what exactly you are looking for? How to make Joe's code work?

I will have try its code to explain whats going on.

What I am trying to emphasis to you, is that don't get stuck with one
trying to figure out a server is not working for you. Try to learn
the basics about sockets. Once you feel comfortable then you can use
other codes that does most of the work for you, like Joe's code and
know you would be better equip to figure out what the issue is.

But the TTY() function is basic client dumb terminal framwork that
does WORK, again, try it against any telnet-like server that provides
output and input for you.

Here is an update to the tty() that leverages the .NET asynchronous
functional of the Available property and introduces LocalEcho and
LineFeed concepts in typical TTY() frameworks:

void tty(String ^hostname, int port = 23)
{
     Console::WriteLine("* Connecting to {0}:{1}",hostname, port);
     TcpClient^ c;
     try {
         c = gcnew TcpClient(hostname,port);
     } catch(SocketException ^e) {
         Console::WriteLine(L"- Connect Error {0}",e->ErrorCode);
         return;
     }

     bool LocalEcho = true; // site dependent
     bool LineFeed = true; // site dependent

     array<Byte>^ bytes = gcnew array<Byte>(4*1024);
     NetworkStream ^cio = c->GetStream();
     while (1) {
         if (Console::KeyAvailable)
         {
             ConsoleKeyInfo^ key = Console::ReadKey(true);
             if (key->Key == ConsoleKey::Escape) break;
             try {
                 if (LocalEcho) {
                     Console::Write((wchar_t)key->KeyChar);
                 }
                 cio->WriteByte(key->KeyChar);
                 if (LineFeed && key->KeyChar == '\r') {
                     cio->WriteByte('\n');
                     if (LocalEcho) Console::WriteLine();
                 }
             } catch( Exception ^e) {
                 break;
             }
         }
         if (c->Available)
         {
             try {
                 int nBytes = c->Client->Receive( bytes );
                 for (int i=0; i < nBytes; i++) {
                     Console::Write("{0}",(wchar_t)bytes[i]);
                 }
             } catch( SocketException ^e) {
                 if (e->ErrorCode == 10054) {
                     Console::WriteLine("! Disconnect");
                     break;
                 }
             }
         }
     }
     c->Close();
     Console::WriteLine("\n* Closed");
}

But using the LocalEcho and LineFeed, it works better for some servers
to display the console output and input.

The TELNET software installed on all Windows applications plus every
Telecommunications application has the same two options that is a per
site setup.

--

stephen park wrote: