Very Computer

Greetings,
   I am using telnet to connect to a port attached to a piece of server
software I wrote.  I would like telnet to go into character by character mode
automatically.  I have tried using send() to send out-of-band data to telnet
to tell it that should use this mode  but I must be missing something.
(If I use the telnet break key then enter mode character, everything is
fine.)  Any suggestions would be greatly appreciated.

Thanks,
   Vince Tkac

I have tried to send the following commands to the telnet client:

IAC DO TELOPT_SGA
IAC DONT TELOPT_LINEMODE
IAC WONT TELOPT_LINEMODE
IAC DO TELOPT_ECHO
IAC DO ECHO
IAC DONT DET

with the following code.

msg[0] = IAC;           msg[1] = DO;            msg[2] = TELOPT_SGA;
send(newsockfd, msg, 3, MSG_OOB)
msg[0] = IAC;           msg[1] = DONT;          msg[2] = TELOPT_LINEMODE;
send(newsockfd, msg, 3, MSG_OOB)
msg[0] = IAC;           msg[1] = WONT;          msg[2] = TELOPT_LINEMODE;
send(newsockfd, msg, 3, MSG_OOB)
msg[0] = IAC;           msg[1] = DO;            msg[2] = TELOPT_ECHO;
send(newsockfd, msg, 3, MSG_OOB)
msg[0] = IAC;           msg[1] = DO;            msg[2] = ECHO;
send(newsockfd, msg, 3, MSG_OOB)
msg[0] = IAC;           msg[1] = DONT;          msg[2] = 20;  /* DET */
send(newsockfd, msg, 3, MSG_OOB)

Can anyone tell me what I am doing wrong here?  The terminal seems not to
be echoing anything but does accept input (in line mode).

Thanks,
   Vince Tkac

[code deleted]

Quote:>Can anyone tell me what I am doing wrong here?  The terminal seems not to
>be echoing anything but does accept input (in line mode).

I think you need to use WILL instead of do.  I wrote a BBS a few years
that you could access through telnet (like a MUD), and here is what I
did:

  sprintf(mesg,"%c%c%c",IAC,WILL,TELOPT_ECHO);   /* put client in no local */
  writestr(&id,mesg,3);                          /* echo, character mode   */
  get_n_bytes(&id,mesg,3);
  sprintf(mesg,"%c%c%c",IAC,WILL,TELOPT_SGA);
  writestr(&id,mesg,3);
  get_n_bytes(&id,mesg,3);

I turned off echo, and had the program write back any characters that
need to be echoed.

David
--
   /David Barr   (206)685-8129   University of Washington           /
  /Systems Programmer           Medical Centers Information Systems/

/        http://alfred1.u.washington.edu:8080/~davidb/           /