Rfc0655
TitleTelnet output formfeed disposition option
AuthorD. Crocker
DateOctober 1974
Format:TXT=5991 bytes
Status:HISTORIC

TELNET OUTPUT FORMFEED DISPOSITION OPTION
RFC 655, NIC 31158 (Oct. 25, 1974)
D. Crocker (UCLA-NMC)
Online file: [ISI]<DCROCKER>NAOFFD.TXT

              TELNET OUTPUT FORMFEED DISPOSITION OPTION

1. Command name and code
   NAOFFD - 13
      (Negotiate About Output Formfeed Disposition)

2. Command meanings
   In the following, we are discussing a simplex connection, as described in 
   the NAOL and NAOP Telnet Options specifications.
      IAC DO NAOFFD
         The data sender requests or agrees to negotiate about output
         formfeed disposition with the data receiver.  In the case
         where agreement has been reached and in the absence of
         further subnegotiations, the data receiver is assumed to be
         handling output formfeeds.
      IAC DON'T NAOFFD
         The data sender refuses to negotiate about output formfeed
         disposition with the data receiver, or demands a return to
         the unnegotiated default mode.
      IAC WILL NAOFFD
         The data receiver requests or agrees to negotiate about
         output formfeed disposition with the sender.  In the case
         where agreement has been reached and in the absence of
         further subnegotiations, the data receiver alone is assumed
         to be handling output formfeeds.
      IAC WON'T NAOFFD
         The data receiver refuses to negotiate about output formfeed
         disposition, or demands a return to the unnegotiated default
         mode.
      IAC SB NAOFFD DS <8-bit value> IAC SE
         The data sender specifies, with the 8-bit value, which party
         should handle formfeeds and what their disposition should be.
         The code for DS is 1.
      IAC SB NAOFFD DR <8-bit value> IAC SE
         The data receiver specifies, with the 8-bit value, which
         party should handle formfeeds and what their disposition
         should be.  The code for DR is 0.

3. Default
   DON'T NAOFFD/WON'T NAOFFD
      In the default absence of negotiations concerning which party, data 
      sender or data receiver, is handling output formfeeds, neither party
      is required to handle formfeeds and neither party is prohibited from 
      handling them; but it is appropriate if at least the data receiver 
      handles formfeed considerations, albeit primitively.

5. Description of the Option
   The data sender and the data receiver use the 8-bit value along with the
   DS and DR SB commands as follows:

      8-bit value                      Meaning                       

      0            Command sender suggests that he alone will handle  
                   formfeeds, for the connection.                     
      1 to 250     Command sender suggests that the other party alone 
                   should handle formfeeds, but suggests that the
                   indicated value be used.  The value is the number  
                   of character-times to wait or number of NULs to    
                   insert in the data stream before sending the next
                   data character.
      251          Command sender suggests that the other party alone 
                   handle formfeeds, but suggests that each           
                   occurrence of the character be replaced by         
                   carriage-return/line-feed.                         
      252          Command sender suggests that the other party alone 
                   handle formfeeds, but suggests that they be        
                   discarded.                                         
      253          Command sender suggests that the other party alone 
                   should handle formfeeds, but suggests that         
                   formfeeds be simulated.                            
      254          Command sender suggests that the other party alone 
                   should handle output formfeeds but suggests        
                   waiting for a character to be transmitted (on the  
                   other simplex connection) before sending more      
                   data. Note that, due to the assynchrony of the two 
                   simplex connections, phase problems can occur with 
                   this option.                                       
      255          Command sender suggests that the other party alone 
                   should handle output formfeeds and suggests        
                   nothing about how it should be done. 

   The guiding rules are that: 

      1) if neither data receiver nor data sender wants to handle output 
      formfeeds, the data receiver must do it, and
      2) if both data receiver and data sender want to handle output
      formfeeds, the data sender gets to do it.