RFC145

Network Working Group J. Postel Request for Comments: 145 UCLA - NMC NIC: 6739 4 May 1971 Updates: 123 Obsoletes: 127

          Initial Connection Protocol Control Commands

 The following is my interpretation of the exchange between NCP's

which would be necessary to carry out the Initial Connection Protocol of RFC #123. (This note corrects an error pointed out by Eric Harslem of RAND).

  Server NCP                      User NCP
  __________                      ________

  Listen for Connection L         RTS, U, L, l
                                              A

  STR, L, U, 32                   ALL, l  , 1, 32
                                        A

  Send 32 bits of data
  in 1 message on link l
                        A

  (value is S)                    Receive 32 bits of data
                                  from link l  (value is S)
                                             A

  CLS, L, U                       CLS, U, L

  STR, S+1, U+1, B                STR, U+1, S, B
                  s                             u

  RTS, S, U+1, l                  RTS, U, S+1, l
                B                               C

  wait for connection             wait for connection
  ALL, l , m , b                  ALL, l , m , b
        B   B   B                       C   C   C

  data sent to link l             data sent on link l
                     C                               B

  data received on link           data received on link l
                       B                                 C

  l , l , and l , are links, m  and m  are messages allocations, b
   A   B       C              B      C                            B
  and b  are bit allocations, and all other symbols are defined in
       C
  RFC #123.

  [This RFC is also available in .PS and. PDF format.]

      [ This RFC was put into machine readable form for entry ]
           [ into the online RFC archives by Lorrie Shiota]