Networking code from BBN.

Source: https://www.tuhs.org/Archive/Distributions/Early_Networking/BBN/

Author: larsbrinkhoff

jnc_bbn.tar.gz

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+BBN PDP-11 V6 Unix with C TCP/IP
+(from Noel Chiappa)
+
+  This is an early TCP/IP Unix system written at BBN. It was not the
+  first TCP/IP Unix; that was one done at BBN in MACRO-11, based
+  on a TCP done in MACRO-11 by Jim Mathis at SRI for the TIU (Terminal
+  Interface Unit).
+
+  This networking code is divided into three main groups. First there is
+  code for the kernel, which includes IPC enhancements to Unix, including
+  Rand ports, as well as further extensions to that done at BBN for the
+  earlier TCP - the capac() and await() calls. It also includes a IMP
+  interface driver (the code only interfaced to the ARPANET at this point in
+  time). Next, TCP is implemented as a daemon which ran as a single process
+  which handled all the connections. Finally, other programs implement
+  applications; TELNET is the only one provided at this point in time.
+
+  A modest amount of documentation is available in the 'doc' directory;
+  included are the original NROFF source to the two Rand publications
+  about ports, and several BBN reports.
+
+  The original port code was written by Steven Zucker at Rand; the extensions
+  done at BBN were by Jack Haverty. The TCP was mostly written by Mike
+  Wingfield, apparently with some assistance by Jon Dreyer. Dan Franklin
+  apparently  wrote the TELNET.
+
+  For more information about this system, see:
+  - "Interprocess Communication Extensions for the UNIX Operating System:
+  I - Design Considerations", Rand Corporation, Report R-2064/1-AF, June 1977.
+  - "Interprocess Communication Extensions for the UNIX Operating System:
+  II - Implementation", Rand Corporation, Report  R-2064/2-PR, April 1977.
+  - "UNIX TCP User's Guide", Bolt Beranek and Newman Inc., Report No. 3724
+

jnc_bbn.txt

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+BBN TCP Vax-Unix
+
+By 1979 the basic TCP/IP specification had been finalised and in
+1980 the US Department of Defence decided to make it its standard
+inter-networking protocol; Arpanet users were directed to switch over
+from NCP to TCP/IP on January 1st 1983 ('flag day'). A good half dozen
+interoperable research implementations existed (for an example see
+BBN-V6 http://minnie.tuhs.org/cgi-bin/utree.pl?file=BBN-V6/tcp), but no
+production quality reference implementation. DARPA contracted with BBN
+to write such a reference implementation for 4BSD Unix.
+
+In January 1981 the design was ready (documented in IEN168
+https://www.rfc-editor.org/ien/ien168.txt) and coding proceeded. In
+parallel several loose ends in the TCP/IP specifications were tied in
+(for example, ICMP replaced GGP as the control message protocol) and
+these specification changes were back integrated into the code base. In
+November 1981 a beta distribution tape that overlaid on 4.1BSD was
+ready. The network API was very similar to that of the earlier NCP Unix
+(see SRI-NOSC http://minnie.tuhs.org/cgi-bin/utree.pl?file=SRI-NOSC). With
+DARPA funding, the code was further developed and maintained into the
+early 90’s.
+
+Next to networking extensions to the kernel, the beta distribution tape
+contains several user programs such as clients and servers for Telnet
+and FTP. It also contains a mail system based on a precursor to SMTP,
+called MTP https://tools.ietf.org/html/rfc772. MTP shows the transition
+of mail from a feature of FTP to an independent protocol.
+
+Separately, DARPA contracted in 1981 with Berkeley’s CSRG to develop
+4.2BSD and to integrate this reference implementation with it. As such,
+it became the starting point for 4.1a BSD. This beta distribution tape
+comes from the CSRG archives.