History log of /freebsd-10.3-release/usr.sbin/ppp/slcompress.c
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# 296373 04-Mar-2016 marius

- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

# 256281 10-Oct-2013 gjb

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation


# 139979 10-Jan-2005 brian

Use the standard BSD copyright as per OpenBSD and /sys/net/slcompress*


# 134789 05-Sep-2004 brian

Make ppp WARNS=5 clean


# 102500 27-Aug-2002 brian

Include the correct file (stdarg.h) and use va_list rather than _BSD_VA_LIST_

Suggested by: mike


# 102413 25-Aug-2002 charnier

Replace various spelling with FALLTHROUGH which is lint()able


# 98243 15-Jun-2002 brian

Remove whitespace at the end of lines.


# 96582 14-May-2002 brian

o Clean up some #includes
o Bump version number to 3.0.4
o When talking to a RADIUS server, provide a NAS-Port-Type.

When the NAS-Port-Type is Ethernet, provide a NAS-Port value equal
to the SESSIONID from the environment in direct mode or the
NGM_PPPOE_SESSIONID message in other modes. If no SESSIONID is found,
default to the interface index in client mode or zero in server mode.

When the NAS-Port-Type is ISDN, set the NAS-Port to the minor number
of the physical device (ie, the N in /dev/i4brbchN).

This makes it easier for the RADIUS server to identify the client
WRT accounting data etc.

Prompted by: lsz8425 <lsz8425@mail.cd.hn.cn>


# 81634 14-Aug-2001 brian

o Add ipv6 support, abstracting most NCP addresses into opaque
structures (well, they're treated as opaque).

It's now possible to manage IPv6 interface addresses and routing
table entries and to filter IPV6 traffic whether encapsulated or
not.

IPV6CP support is crude for now, and hasn't been tested against
any other implementations.

RADIUS and IPv6 are independent of eachother for now.

ppp.linkup/ppp.linkdown aren't currently used by IPV6CP

o Understand all protocols(5) in filter rules rather than only a select
few.

o Allow a mask specification for the ``delete'' command. It's now
possible to specifically delete one of two conflicting routes.

o When creating and deleting proxy arp entries, do it for all IPv4
interface addresses rather than doing it just for the ``current''
peer address.

o When iface-alias isn't in effect, don't blow away manually (via ``iface
add'') added interface addresses.

o When listening on a tcp server (diagnostic) socket, bind so that a
tcp46 socket is created -- allowing both IPv4 and IPv6 connections.

o When displaying ICMP traffic, don't display the icmp type twice.
When display traffic, display at least some information about unrecognised
traffic.

o Bump version

Inspired after filtering work by: Makoto MATSUSHITA <matusita@jp.FreeBSD.org>


# 58042 14-Mar-2000 brian

Fix some printf-style argument bugs


# 54912 20-Dec-1999 brian

Cosmetic: Make struct mbuf more like kernel mbufs.


# 52197 13-Oct-1999 brian

When uncompressing VJ-compressed frames, fix the ip_sum directly
in struct cstate rather than copying the stored header slot into a
potentially mis-aligned buffer then trying to update the ip_sum
without causing an exception on non-i386 hardware.

I've never been able to reproduce this problem, but it has been
reported by many people... besides, the code is now a bit cleaner.

Testing & patience by: Anthony Solovjoff <asolovjoff@hotmail.com>


# 50479 28-Aug-1999 peter

$Id$ -> $FreeBSD$


# 48724 10-Jul-1999 brian

Oops - add a missing cast.


# 48723 10-Jul-1999 brian

Leap through one more hoop to avoid alignment problems.


# 46828 09-May-1999 brian

Deal with the fact that as we now mbuf_Read the fsm
header in fsm_Input() we often end up with a NULL mbuf.

Deal with a possible NULL mbuf being passed into
mbuf_Prepend().

Adjust some spacing to make things more consistent.


# 46686 08-May-1999 brian

o Redesign the layering mechanism and make the aliasing code part of
the layering.

We now ``stack'' layers as soon as we open the device (when we figure
out what we're dealing with). A static set of `dispatch' routines are
also declared for dealing with incoming packets after they've been
`pulled' up through the stacked layers.

Physical devices are now assigned handlers based on the device type
when they're opened. For the moment there are three device types;
ttys, execs and tcps.

o Increment version number to 2.2
o Make an entry in [uw]tmp for non-tty -direct invocations (after
pap/chap authentication).
o Make throughput counters quad_t's
o Account for the absolute number of mbuf malloc()s and free()s in
``show mem''.
o ``show modem'' becomes ``show physical''.


# 45188 31-Mar-1999 brian

Oops - remove register keyword


# 45185 31-Mar-1999 brian

Another alignment bogon.


# 45138 30-Mar-1999 brian

Point at cs.slcs_u.csu_ip instead of the just-copied ``cp''
when recalculating the ip checksum. cp is not guaranteed to
be aligned. It now doesn't matter that cp isn't aligned as
the caller does another mbuf_Alloc() regardless.


# 43313 28-Jan-1999 brian

Initial RADIUS support (using libradius). See the man page for
details. Compiling with -DNORADIUS (the default for `release')
removes support.

TODO: The functionality in libradius::rad_send_request() needs
to be supplied as a set of routines so that ppp doesn't
have to wait indefinitely for the radius server(s). Instead,
we need to get a descriptor back, select() on the descriptor,
and ask libradius to service it when necessary.
For now, ppp blocks SIGALRM while in rad_send_request(), so
it misses PAP/CHAP retries & timeouts if they occur.

Only PAP is functional. When CHAP is attempted, libradius
complains that no User-Password has been specified... rfc2138
says that it *mustn't* be used for CHAP :-(

Sponsored by: Internet Business Solutions Ltd., Switzerland


# 38557 26-Aug-1998 brian

Put the IP buffer queues into struct ipcp.
Forgotten by: me


# 37189 27-Jun-1998 brian

Don't assume ``sizeof(u_long) == 4''
Submitted by: Theo


# 37009 15-Jun-1998 brian

Fix a rather nasty use of `static'. This caused a SEGV
when running ``link * load label'' as we ended up recursing
back into command_Interpret after nuking our command arg list.


# 36960 14-Jun-1998 brian

o Pass our negotiated number of VJ slots into
sl_uncompress_tcp() and drop packets with
slot numbers that are out of range.
o Drop packets that want to use a slot that still
has an IP header length of 0 (ie, the requested
slot number is bogus again).

Without this code, if the other side mis-behaves (and
sends us garbage slot numbers), we happily ``adjust''
a memset(..., '\0', ...) TCP/IP header and promptly
cr*p all over the stack before returning.... quickly
followed by a SIGBUS.

Dodgy ISP used by, and help locating the problem from: jmz
Problem also seen by: Mourad de Riche <omnibus@image.dk>

There's still a link lockup after this happens, but my
bets are on the other side (who has already started sending
rubbish) being to blame.


# 36285 21-May-1998 brian

MFMP: Make ppp multilink capable.
See the file README.changes, and re-read the man page.


# 31962 24-Dec-1997 brian

Cosmetic (style):
sizeof(var) -> sizeof var
sizeof type -> sizeof(type)

Suggested by: J Wunsch <j@uriah.heep.sax.de>


# 31343 22-Nov-1997 brian

Fix prototypes.
Remove extraneous decls.
Add ``const'' to several places.
Allow ``make NOALIAS=1'' to remove IP aliasing.
Merge with OpenBSD - only the Makefiles vary.

We can now survive a compile with
-Wall -Wbad-function-cast -Wcast-align -Wcast-qual
-Winline -Wmissing-declarations -Wmissing-prototypes
-Wnested-externs -Wpointer-arith -Wredundant-decls
-Wshadow -Wstrict-prototypes -Wwrite-strings -Wchar-subscripts
(although the Makefile just contains -Wall).


# 30715 26-Oct-1997 brian

Cosmetic (no functional changes):
o Add missing $Id$s
o Move extern decls from .c -> .h files
o Staticize
o Remove #includes from .h files
o style(9)ify includes
o bcopy -> memcpy
bzero -> memset
bcmp -> memcmp
index -> strchr
rindex -> strrchr
o Move timeout.h -> timer.h (making it consistent w/ timer.c)
o Add -Wmissing-prototypes


# 30357 12-Oct-1997 brian

Un-spam ip_sum (arrgh - I don't know how this made
it into my patches :()


# 30187 07-Oct-1997 brian

Support VJ maximum slot identifiers != 15.
Support VJ slot id compression.

Previously, ppp would negotiate a max slot between 2 & 15
(if asked), and would agree to slot id compression (if asked).
It would then proceed to use 16 slots and no compression
anyway. The result was a rather unusable connection.


# 28679 25-Aug-1997 brian

Make the code format more in line with style(9).
Update loadalias to use the new libalias api.
Update to version 1.1.


# 26516 09-Jun-1997 brian

Overhaul ppp:
o Use syslog
o Remove references to stdout/stderr (incl perror())
o Introduce VarTerm - the interactive terminal or zero
o Allow "set timeout" to affect current session
o Change "set debug" to "set log"
o Allow "set log [+|-]flag"
o Make MSEXT and PASSWDAUTH stuff the default
o Move all #ifdef DEBUG stuff into the code - this
shouldn't be too much overhead. It's now controlled
with "set log +debug"
o Add "set log command, debug, tun, warn, error, alert"
o Remove cdefs.h, and assume an ansi compiler.
o Improve all diagnostic output
o Don't trap SIGSEGV
o SIGHUP now terminates again (log files are controlled
by syslog)
o Call CloseModem() when changing devices
o Fix parsing of third arg of "delete"

I think this fixes the "magic is same" problems that some
people have been experiencing.
The man page is being rewritten. It'll follow soon.


# 22997 22-Feb-1997 peter

Revert $FreeBSD$ to $Id$


# 21673 14-Jan-1997 jkh

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.


# 15193 11-Apr-1996 dg

Fix editing mistake in last commit...sorry.


# 15190 11-Apr-1996 dg

Bugfix based on a kernel fix:

When PPP gets an uncompressed packet, it attempts to save off the TCP/IP
header for use in decompressing subsequant packets. If PPP gets garbage
(such as what happens when there is a port speed mismatch or modem line
noise), it will occasionally mistake the packet as a valid uncompressed
packet. When it tries to save off the header, it doesn't bother to check
for the validity of the header length and will happily clobber not only
the PPP VJC data structure, but parts of other process memory that happens
to follow it...causing, ahem, undesired behavior.


# 13389 11-Jan-1996 phk

Final cleanup for now. -Wall is now silent. A couple of bogons found.


# 8857 30-May-1995 rgrimes

Remove trailing whitespace.


# 6735 26-Feb-1995 amurai

New user Process PPP based on iij-ppp0.94beta2.

o Supporting SYNC SIO device (But need a device driver)
- add "set speed sync"
o Fixing bug for Predictor-1 function.
o Add new parameter that re-sent interval for set timeout commands.
o Improving RTT (Round Trip Time) and reducing processor time.
- Previous Timer service was using polling, and now using
SIGALRM ;-)
- A 0.94beta2 will not work correctly....

-- Follows are additinal feature not including 0.94beta2
o Support Proxy ARP
- add "enable/disable proxy" commands
o Marging common routine in CHAP/PAP.
o Enhancing LCP/IPCP log information.
o Support local Authfication connection on port 300x and tty.
- You can set up pair of your "hostname -s" and
password in ppp.secret. if either ppp.secret file nor
your hostname line don't exist, It will notify a message
and working as same as previous version.(Backword compatibility)
- If you did set up them, It's allow connection but nothing to do
except help and passwd command.
- add "passwd yourpasswd" commands
o Support afilter - keep Alive filter that a packet can send/receiving
according to ifilter/ofilter but doesn't count it as preventing idle
timer expires.
- Same syntax of other filters.
o Fixing bugs reported by current user for previous one. Thanks !!

Reviewed by: Atsushi Murai (amurai@spec.co.jp)


# 6060 31-Jan-1995 amurai

This commit was generated by cvs2svn to compensate for changes in r6059,
which included commits to RCS files with non-trunk default branches.


# 6059 31-Jan-1995 amurai