[Simh] Announcing TCP/IP for RSX-11M-PLUS

[Johnny Billquist]

Time for a new release announcement of TCP/IP for RSX-11M-PLUS.

Highlights:


. IP multicasting have been implemented
. TCP stability improvements



Detailed information on things that have been done since the last release:


IP:
. Added IP multicast support, and functions to enable this on UDP sockets.


UDP:
. Added functions for joining and leaving multicast groups on sockets.


TCP:
. Bugfix in TCP. Under some circumstances, TCP will stop receiving data 
because of a calculation error on TCP sequence numbers.
. Improvement in TCP. Code accidentally sent unnecessary probes when a 
socket is in Close Wait.
. Bugfix in TCP. Any ICMP error received for a socket caused the TCP 
connection to close down. This should not happen for ICMP source quench 
or ICMP timeout messages.
. Correct MSS computation and setup based on interface MTU.


IFCONFIG:
. Added ability to change MTU of interface in IFCONFIG.


FTPD:
. Bugfix in FTPD. Long home directory names caused FTPD to fail.



Some additional notes:

Some people might wonder why the multicast changes have been introduced, 
but no other changes related to it. I wanted to get this change out now 
in order to allow people the possibility to play with it, if anyone is 
interested. For my own part, I next plan to look at mDNS, to allow RSX 
to live in home networks without a proper DNS server, but still be 
visible to other systems. mDNS depends on multicast groups.

In addition, the TCP corrections finally fixed some long standing 
problems that I have been observing that have been very rare, but very 
annoying to me. BQTCP is now behaving very well on the network, and I do 
not actually have any known issues (at this time) that that are nagging 
me. I hope this release will see a further reduction on work on 
protocols like IP, TCP and UDP, and future work will be even more 
focused on higher level protocols.



As usual, the distribution is available from:
ftp://mim.update.uu.se/bqtcp.dsk
ftp://mim.update.uu.se/bqtcp.tap
ftp://ftp.update.uu.se/pub/pdp11/rsx/tcpip/tcpip.dsk

The documentation is also available through ftp on Mim, or also at 
http://mim.update.uu.se/tcpipdoc

I hope people find this update useful.


	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol