Xeraph@NCHOVY

KpyM 텔넷 서버에서 주운 문서

- OLD LINE MODE -
FF FC 01 FF FC 03 -> IAC WONT ECHO IAC WONT SGO

- CHAR MODE -
FF FB 01 FF FB 03 -> IAC WILL ECHO IAC WILL SGO

255 251 31 -> IAC WILL Negotiate About Window Size
255 251 32 -> IAC WILL TERMINAL-SPEED
255 251 24 -> IAC WILL TERMINAL-TYPE
255 251 39 -> IAC WILL NEW_ENVIRON
255 253 01 -> IAC DO Echo
255 251 03 -> IAC WILL SUPPRESS-GO-AHEAD
255 253 03 -> IAC DO SUPPRESS-GO-AHEAD

--------------------------server
255 251 03 -> IAC WILL SUPPRESS-GO-AHEAD
255 253 03 -> IAC DO SUPPRESS-GO-AHEAD
255 254 24 -> IAC DON'T TERMINAL-TYPE
255 254 32 -> IAC DON'T TERMINAL-SPEED
255 251 01 -> IAC WILL ECHO
255 254 31 -> IAC DON't Negotiate About Window Size
255 254 39 -> IAC DON'T NEW_ENVIRON

그리고 텔넷 라인모드 옵션에 이런 구절도 있음. 요약하면 WILL ECHO랑 WILL SGO 같이 보내라는 것임.

"In many TELNET implementations it will be desirable to couple the SUPRESS-GO-AHEAD option to the echo option so that when the echo option is in effect, the SUPPRESS-GO-AHEAD option is in effect simultaneously: both of these options will normally have to be in effect simultaneously to effect what it commonly understood to be character at a time echoing by the remote computer."