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- This archive contains changes to the kernel and slattach
- to implement compressed (Van Jacobson TCP header compression) SLIP
- (aka CSLIP) for Amiga Unix.
-
- I have tested the changes on Amiga Unix 2.03 and 2.1c, and I've used
- both SLIP and CSLIP modes successfully.
-
-
- INSTALLATION
- ------------
-
- To apply the changes, here's a roadmap of the provided files. The
- `usr' directory starts a hierarchy that corresponds to the /usr
- hierarchy, and thus usr/amiga/bin/slattach corresponds to
- /usr/amiga/bin/slattach.
-
- usr/amiga/bin: a new slattach binary, understanding
- slattach new options `compressed', `autocomp'
- and `noicmp'.
-
- usr/amiga/src/cmd/slattach: diffs against the original slattach
- slattach.c-diff source to implement the new options.
-
- usr/sys/amiga/driver: kernel changes:
- slcompress.c new files. Implement compression/
- slcompress.h decompression.
- slip.c-diff diffs against the original slip.c
-
-
- To integrate the changes, replace the slattach binary (make a backup
- of the old one!) with the one in usr/amiga/bin. If you're interested
- into the new source (and if you have installed the amigasrc package)
- apply the slattach.c-diff patch to /usr/amiga/src/cmd/slattach/slattach.c.
-
- To update the kernel, cd to /usr/sys/amiga/driver. Then do a
- cp slip.c cslip.c
- Now apply the slip.c-diff, this will change the cslip.c from being a
- copy of slip.c into the real cslip.c. (If you don't want to keep the old
- driver slip.c, rename it to cslip.c and apply the patch. I don't
- recommend this however, I always like to have backups to fall back on).
-
- Copy slcompress.[ch] into this directory as well.
-
- Now to edit /usr/sys/amiga/driver/Makefile. Replace in the assignment
- to OBJ the "slip.o\" with "cslip.o slcompress.o\".
-
- Then cd back to /usr/sys and make a new kernel.
-
-
-
- WHAT'S NEW
- ----------
- The old device is enhanced to handle CSLIP as well as SLIP, so no new
- devices and/or streams modules are created. I added some code to
- slattach to set the new modes of the driver, so the syntax for slattach
- is new:
-
- slattach <speed> <local-addr> <remote-addr> [<new-opts>] [ifconfig opts]
-
- with [<new-opts>] being optional, and a combination of:
- compress enable CSLIP mode. When in this mode, SLIP tcp headers
- are *not* recognized.
- autocomp run in SLIP mode. On receipt of a valid compressed
- packet, automatically switch to CSLIP mode. This is the
- preferred mode of operation on the server side of the
- communication, so that both kinds of protocols are
- available in parallel.
- noicmp when in CSLIP mode, supress ICMP traffic. This mode is
- meant to be used in low-speed connections, so nobody
- can saturate the link with ICMP packets (such as
- generated by /usr/sbin/ping). Don't set this flag if
- if you don't have problems with ICMP packets.
-
- On my machine, I'm using "slattach ... compress" to connect to the
- other side, where I run "slattach ... autocomp" to enable both, SLIP
- and CSLIP clients to connect.
-
-
- COPYRIGHT / DISCLAIMER
- ----------------------
- Sources are copyrighted by the "Regents of the University of
- California." Please see the header of slcompress.h for the full
- copyright notice and disclaimer. I (Markus Wild) regard myself as
- "contributor" according to the above Copyright.
-
-
- Good luck!
-
- If you find bugs, please tell me! You can reach me at:
-
- <wild@nessie.cs.id.ethz.ch> and <wild@amiga.physik.unizh.ch>
-