rfc1116.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

           SPC0    Initial setting for a special character
           SPC1    A changed special character < SPC0
           SPC-A   All current special character settings
           VAL     SLC_VALUE level
           DEF     SLC_DEFAULT level






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RFC 1116                 Telnet Linemode Option              August 1989


   Levels: DEFAULT, VALUE, CANT_CHANGE, NOSUPPORT
   Flags: ACK

           Receive                 Response
           -------                 --------
           f,SLC_DEFAULT,x         f,SLC_VALUE,v
                                   f,SLC_CANTCHANGE,v
                                   f,SLC_NOSUPPORT,x

           f,SLC_VALUE,v           f,SLC_ACK|SLC_VALUE,v
                                   f,SLC_CANTCHANGE,w
                                   f,SLC_NOSUPPORT,x

           f,SLC_CANTCHANGE,v      f,SLC_ACK|SLC_CANTCHANGE,v
                                   f,SLC_NOSUPPORT,x

           f,SLC_NOSUPPORT,x       f,SLC_ACK|SLC_NOSUPPORT,x

           x,SLC_ACK|x,x           no response

5.10 Examples of a connection

   In these examples, the symbolic names are used rather than the actual
   values, to make them readable.  When two or more symbolic names are
   joined by a |, it means that the actual value will be the logical
   "or" of the values of the symbolic names.  In the interest of
   clarity, for these examples the leading IAC and IAC SB sequences, and
   the trailing IAC SE sequences have been omitted.  Also, the SLC_
   prefix has been left off where ever it would normally occur.

       CLIENT                        SERVER
       ------                        ------
                                     DO TOGGLE-FLOW-CONTROL
                                     DO LINEMODE
       WILL TOGGLE-FLOW-CONTROL
       WILL LINEMODE
       [ Subnegotiation may now proceed in both directions.  The client
         sends of the list of special characters.  ]
       LINEMODE SLC SYNCH DEFAULT 0
       IP VALUE|FLUSHIN|FLUSHOUT 3 AO
       VALUE 15 AYT DEFAULT 0 ABORT
       VALUE|FLUSHIN|FLUSHOUT 28 EOF
       VALUE 4 SUSP VALUE|FLUSHIN 26
       EC VALUE 127 EL VALUE 21 EW
       VALUE 23 RP VALUE 18 LNEXT
       VALUE 22 XON VALUE 17 XOFF
       VALUE 19
       [ Now that linemode is enabled,  the  server  sets  the  initial



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RFC 1116                 Telnet Linemode Option              August 1989


         mode, and acknowledges the special characters.  ]
                                     LINEMODE MODE EDIT

                                     LINEMODE SLC SYNCH NOSUPPORT 0 IP
                                     VALUE|FLUSHIN|FLUSHOUT|ACK 3 AO
                                     NOSUPPORT 0 AYT NOSUPPORT 0 ABORT
                                     VALUE|FLUSHIN|FLUSHOUT|ACK 28 EOF
                                     VALUE|ACK 4 SUSP NOSUPPORT 0 EC
                                     VALUE|ACK 127 EL VALUE|ACK 21 EW
                                     VALUE|ACK 23 RP VALUE|ACK 18 LNEXT
                                     VALUE|ACK 22 XON VALUE|ACK 17 XOFF
                                     VALUE|ACK 19
       [ The client gets the mode and ack of the special characters,
         and acks the mode and any special characters that the server
         changed.  ]
       LINEMODE MODE EDIT|MODE_ACK

       LINEMODE SLC SYNCH
       NOSUPPORT|ACK 0 AO
       NOSUPPORT|ACK 0 AYT|ACK NOSUP-
       PORT 0 SUSP NOSUPPORT|ACK 0
                                     "Login:"
       "my_account"
       [ Turn off echo to the user.  ]
                                     WILL ECHO
       DO ECHO
                                     "Password:"
       "my_password"
       [ Turn back on echo to the user.  ]
                                     WONT ECHO
       DONT ECHO
       [ User does some stuff, and then runs an application that wants
         to use single character mode, doing its own echoing of
         characters, but keep signal trapping on.  ]
                                     WILL ECHO
       DO ECHO
                                     LINEMODE MODE TRAPSIG
       LINEMODE MODE TRAPSIG|MODE_ACK
       [ Application finishes.  ]
                                     WONT ECHO
       DONT ECHO
                                     LINEMODE MODE EDIT|TRAPSIG
       LINEMODE MODE
       EDIT|TRAPSIG|MODE_ACK
       [ Another application, that wants full control of everything.  ]
                                     WILL ECHO
       DO ECHO
                                     LINEMODE MODE 0



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RFC 1116                 Telnet Linemode Option              August 1989


       LINEMODE MODE 0|MODE_ACK
       [ Application finishes.  ]
                                     WONT ECHO
       DONT ECHO
                                     LINEMODE MODE EDIT|TRAPSIG
       LINEMODE MODE
       EDIT|TRAPSIG|MODE_ACK
       [ The user changes his erase character to ^H.  ]
                                     LINEMODE SLC EC VALUE 8
       LINEMODE SLC EC VALUE|ACK 8
       [ The user decides to revert to all the original client side
         special characters.  ]
       LINEMODE SLC SYNCH DEFAULT 0
       IP VALUE|FLUSHIN|FLUSHOUT 3 AO
       VALUE 15 AYT DEFAULT 0 ABORT
       VALUE|FLUSHIN|FLUSHOUT 28 EOF
       VALUE 4 SUSP VALUE|FLUSHIN 26
       EC VALUE 127 EL VALUE 21 EW
       VALUE 23 RP VALUE 18 LNEXT
       VALUE 22 XON VALUE 17 XOFF
       VALUE 19
                                     LINEMODE SLC SYNCH NOSUPPORT 0 AO
                                     NOSUPPORT 15 AYT NOSUPPORT 0 SUSP
                                     NOSUPPORT|FLUSHIN 26 EC VALUE|ACK
                                     127 EW VALUE|ACK 23 RP VALUE|ACK
                                     18 LNEXT VALUE|ACK 22 XON
                                     VALUE|ACK 17 XOFF VALUE|ACK 19
       LINEMODE SLC SYNCH
       NOSUPPORT|ACK 0 AO
       NOSUPPORT|ACK 15 AYT
       NOSUPPORT|ACK 0 SUSP
       NOSUPPORT|ACK|FLUSHIN 26
       [ The user decides to import the remote sides default special
         characters.  ]
       LINEMODE SLC 0 DEFAULT 0
                                     LINEMODE SLC IP
                                     VALUE|FLUSHIN|FLUSHOUT 3 ABORT
                                     VALUE|FLUSHIN|FLUSHOUT 28 EOF
                                     VALUE 4 EC VALUE 127 EL VALUE 21
       [ Since these are the same as the current local settings, no
         response is generated.  ]
       [ This next example is what would happen if an editor was fired
         up, that wanted to let the client side do the echoing and
         buffering of characters, but did not want it to do any line
         editing, and only forward the data when got a control
         character.  Note that we have preceded all the the 0377s in the
         forward mask with an IAC.  ]
                                     LINEMODE MODE 0



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RFC 1116                 Telnet Linemode Option              August 1989


                                     LINEMODE DO FORWARDMASK IAC 0377
                                     IAC 0377 IAC 0377 IAC 0377 0 0 0 0
                                     0 0 0 0 0 0 0 01
       LINEMODE MODE 0
       LINEMODE WILL FORWARDMASK
       [ Application runs to completion, and then things are to be set
         back to what they were before.  ]
                                     LINEMODE MODE EDIT|TRAPSIG
                                     LINEMODE DONT FORWARDMASK
       LINEMODE MODE EDIT|TRAPSIG
       LINEMODE WONT FORWARDMASK

6.  Other Telnet options and RFCs

   The following is a list of RFCs for various Telnet options  that
   should be supported along with LINEMODE.

   1.  Postel, J. and J. Reynolds, "TELNET PROTOCOL SPECIFICATION", RFC
       854, USC/Information Sciences Institute, May 1983.

   2.  Postel, J. and J. Reynolds, "TELNET OPTION SPECIFICATIONS", RFC
       855, USC/Information Sciences Institute, May 1983.

   3.  Postel, J. and J. Reynolds, "TELNET BINARY TRANSMISSION", RFC
       856, USC/Information Sciences Institute, May 1983.

   4.  Postel, J. and J. Reynolds, "TELNET ECHO OPTION", RFC 857,
       USC/Information Sciences Institute, May 1983.

   5.  Postel, J. and J. Reynolds, "TELNET SUPRESS GO AHEAD OPTION", RFC
       858, USC/Information Sciences Institute, May 1983.

   6.  Postel, J. and J. Reynolds, "TELNET TIMING MARK OPTION", RFC 860,
       USC/Information Sciences Institute, May 1983.

   7.  VanBokkeln, J., "Telnet Terminal-Type Option", RFC 1091, FTP
       Software, Inc., February 1989.

   8.  Waitzman, D., "Telnet Window Size Option", RFC 1073, BBN STC,
       October 1988.

   9.  Hedrick, C., "Telnet Remote Flow Control Option", RFC 1080,
       Rutgers University, November, 1988.

  10.  Hedrick, C., "Telnet Terminal Speed Option", RFC 1079, Rutgers
       University, December, 1988.

   The following is a list of RFCs that need not be supported for



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RFC 1116                 Telnet Linemode Option              August 1989


   LINEMODE, but which would enhance any TELNET implementation.

  11.  Postel, J. and J. Reynolds, "TELNET STATUS OPTION", RFC 859,
       USC/Information Sciences Institute, May 1983.

  12.  Postel, J. and J. Reynolds, "TELNET END OF RECORD OPTION", RFC
       885, USC/Information Sciences Institute, December 1983.

  13.  Silverman, S., "OUTPUT MARKING TELNET OPTION", RFC 933, MITRE-
       Washington, January 1985.

  14.  Marcy, G., "Telnet X Display Location Option", RFC 1096, Carnegie
       Mellon University, March 1989.

Author's Address

       Dave Borman
       Cray Research Inc.
       1440 Northland Drive
       Mendota Heights, MN 55120

       Phone: [phone]

       EMail: [e-mail]



























Telnet Linemode Working Group                                  [Page 21]