RFC 433

Socket number list

📅 published December 1972, from ietf

RFC 433: Socket Number List ✨

okay bestie, let's start with the vibes check 🎀. This is RFC 433, a Socket Numbers doc from the Network Working Group, written by Jon Postel (UCLA-NMC) and Nancy Neigus (BBN). It's NIC 13491, dated 22 December 1972, and its header lists References: 349. There's no obsoletes or updates line in the header, so nothing gets replaced or patched here 🧚

The Big Idea 💅

so the czar of socket numbers, Jon Postel 👑, has set up assignments for socket numbers used for public functions. quick tea ☕: a socket number is a 40 bit quantity. the first 8 bits are the host specification, the next 24 bits are site specific, and the last 8 bits are user specified. those last 8 bits are called the AEN, which the doc says stands for, cleverly enough, Another Eightbit Number 🙈 iconic naming, no notes.

For the assignments in this doc, the host field covers all hosts (unless it says otherwise), the 24 bit field is zero, and the AEN is listed right here 🦋

General Assignments 🌸

the ranges go like this:

       Sockets         Assignment

       0 - 63          Network Wide Standard Functions
       64 - 127        Host Specific Functions
       128 - 239       Reserved for Future Use
       240 - 255       Any Experimental Function

Particular Assignments 💜

these are the specific sockets with their functions. the list is giving very organized energy:

       Socket          Assignment

       1               Telnet
       3               File Transfer
       5               Remote Job Entry
       7               Echo
       9               Discard
       19              Character Generator [e.g. TTYTST]

       65              Speech Data Base @ ll-tx-2 (74)
       67              Datacomputer @ cca (31)

       241             NCP Measurement
       243             Survey Measurement
       245             LINK

the specs for these functions live in the docs below. the references are the main character here 🧚

               Telnet                  RFC 318
               File Transfer           RFC 354 & RFC 385
               Remote Job Entry        RFC 407
               Echo                    RFC 347
               Discard                 RFC 348
               Character Generator     RFC 429
               Speech Data Base        SUR 37
               Datacomputer            [Murray @ CCA]
               NCP Measurment          RFC 388
               Survey Data             [Kampe @ NMC]
               LINK                    [Bressler @ BBN]

Conflicts Are Not It 🙅‍♀️

it has come to our attention that some hosts are running useful public services on sockets that clash with the scheme above. we're hoping to fix this with minimal disruption 🥺 not the vibe, but we're handling it.

The Host Tabulation 🍓

this part is a tabulation of socket numbers and the services they offer. it's presented as a helper for network users. if you spot a socket or function that's missing, or an entry that needs fixing or deleting, reach out to either of these legends 🫶

                       Jon Postel
                       3804 Boelter Hall
                       Computer Science Department
                       University of California
                       Los Angeles, CA. 90024

                       Phone: (213) 825-2368

                       NIC Ident = JBP

                               or

                       Nancy Neigus
                       Bolt Beranek and Newman
                       50 Moulton Street
                       Cambridge, Mass. 02139

                       Phone: (617) 661-0100

                       NIC Ident = NJN

they're also happy to list socket/function info for things that aren't "offical" sockets, like Tip News 💖

here's the full host list, the hosts and their sockets, all in one place 💅:

   1   UCLA-NMC
      1   Telnet
      241 NCP Measurement
      243 Survey Data
   2    SRI-ARC
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   3    UCSB
      1    Telnet
      5    UCSB RJS [not ARPANET standard]
      7    Echo
      9    Discard
   4    UTAH
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   5    NCC
   6    MIT-Multics
      1    Telnet
   9   Harvard
      1    Telnet
      3    Sorry File Transfer
   10   LL-67
      1    Telnet
   11   SAIL
      1    Telnet
      3    File Transfer
   12   ILL-ANTS
   13   CASE
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   14   CMU
      1    Telnet
      3    File Transfer
   15   ILLIAC-TENEX
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   16   NASA-AMES
      1    Telnet
      3    File Transfer
      5    Sorry Remote Job Entry
      7    Echo
      9    Discard
      241 NCP Measurement
   23   USC-44
   31   CCA-TENEX
      1    Telnet
      3    File Transfer
      5    Echo
      9    SYSTAT
      11   NETSTAT
   35   UCSD
      1    Telnet
   65   UCLA-CCN
      1    Telnet
      7    Echo
      9    Discard
      11   NETPJS [EBCDIC]
      13   NETRJS [ASCII]
      15   NETRJS [TTY]
   66   SRI-AI
      1    Telnet
      3    DATE-TIME
      5    Echo
      7    CPYNET
      9    SYSTAT
      11   Sorry NETSTAT
   69   BBN-TENEX (a)
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
      15   NETSTAT
      17   Oneliners
      3604505 = x'370019' = o'15600031'   TIP News
   70   MIT-DMCG
      1    Telnet
      3    File Transfer
      7    Network Status
      9    Discard
   74   LL-TX-2
      1    Telnet

   78   CMU-alt
      1    Telnet
      3    File Transfer
   86   ISI-TENEX
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   133  BBN-TENEXB
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
      15   NETSTAT
      17   Oneliners
   134  MIT-AI
      1    Telnet
      3    File Transfer
   198  MIT-Mathlab
      1    Telnet
      3    File Transfer

Hosts Not Tested 🧪

these hosts are on the list but haven't been tested yet, so no promises 🥹

   7    RAND
   8    SDC-ADEPT
   19   NBS-ANTS
   138  LL-TSP
     [ This RFC was put into machine readable form for entry ]
      [ into the online RFC archives by James Carlson 11/98 ]

that's the whole doc, bestie 🌈✨ it's a socket-number lineup that's honestly iconic 👑

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