Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Make ppp WARNS=5 clean

If IPCP is disabled, susccess of IPV6CP negotiation is sufficient
to communicate by IPv6. So, the prompt should be `PPP' rather
than `PPp'.

Replace various spelling with FALLTHROUGH which is lint()able

Remove whitespace at the end of lines.

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>

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>

MAXHOSTNAME includes space for a NUL

MAXPATHLEN -> PATH_MAX
Don't assume MAXHOSTNAMELEN includes the NUL
Correct a diagnostic
Use "localhost" in our prompt instead of ""

Allow ``set server closed'' to close the diagnostic socket.
Allow ``set server open'' to re-open the diagnostic socket.
Handle SIGUSR1 by re-opening the diagnostic socket
When receiving SIGUSR2 (and in ``set server none''), don't forget the
socket details so that ``set server open'' and SIGUSR1 open it again.

Don't create the diagnostic socket as uid 0 ! It's far to dangerous.

Support link identification from rfc1570
Two new commands are available; ``ident'' and ``sendident''.

To avoid namespace polution in NetBSD:

``struct descriptor'' -> ``struct fdescriptor''

Notice and warn about unterminated quoted strings in commands.
The entire command is ignored if the syntax is invalid...

Back out the bogus #ifdef __NetBSD__ #include <signal.h> lines.
The original report was due to a mis-installation of the NetBS
header files :-/

Submitted by: Kazuyoshi Kato <kazk@yyy.or.jp>

NetBSD has moved ``extern int errno;'' to signal.h :-/

Submitted by: Kazuyoshi Kato <kazk@yyy.or.jp>

When logging warning messages, there are now three scenarios:
o If a prompt is executing the command, only display the warning to
that prompt
o If a prompt is executing a ``load'' command, display the warning
to all prompts *and* syslog
o Otherwise, display the warning to all prompts *and* syslog.

$Id$ -> $FreeBSD$

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''.

Handle the detection of frames even if we read them
with more than one read(). When we detect one, don't
forget to pass it to async_Input() and drop our
terminal back into command mode.

Don't output an extraneous \r if we're passed \r\n
to prompt_vprintf in raw mode.

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

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

When entering ``term'' mode, don't output any messages until
the device is successfully opened. If we fail to open it,
mention the fact.
Also go back into command mode as soon as the device is closed
rather than waiting for the user to type something before noticing.

o Support callback types NONE, E.164, AUTH and CBCP.
(see the new ``set callback'' and ``set cbcp'' commands)
o Add a ``cbcp'' log level and mbuf type.
o Don't dump core when \T is given in ``set login'' or
``set hangup''.
o Allow ``*'' and blanks as placeholders in ppp.secret and
allow a fifth field for specifying auth/cbcp dialback
parameters.
o Remove a few extraneous #includes
o Define the default number of REQs (restart counter) in defs.h
rather than hardcoding ``5'' all over the place.
o Fix a few man page inconsistencies.

Don't disable ^D in interactive mode.
Wished for by: pkh

o If we come out of select() with only write descriptors that
end up writing zero bytes, sleep for 1/10 of a second so that
we don't end up using up too much cpu.
This should only ever happen on systems that wrongly report a
descriptor as writable despite the tty buffer being full.
Discussed with: Jeff Evarts

o Do an initial run-time check to see if select() alters the passed
timeval. This knowledge isn't yet used, but will be soon.

Change some log levels. ALERTs are only logged when
something that can't happen happens or when everyone
needs to know. ERRORs are only logged when something
unexpected happens.

o Don't dump core with ~m in term mode.
o Always put a '\r' before a '\n' at the end of a line
in prompt_vPrintf() in term mode, and make prompt_Printf()
use prompt_vPrintf().
o Fix ~? message.

o De-staticise things that don't need to be static.
o Bring the static ``ttystate'' into struct prompt so that
the tilde context is per prompt and not global.
o Comment the remaining static variables so that it's
clear why they're static.
o Add some XXX comments suggesting that our interface list
and our hostname should be re-generated after a signal
(say SIGUSR1) so that a machine with PCCARDs has a chance.

Don't assume stdout is a tty in interactive mode
Analyzed by: dmaddox@scsn.net (Donald J. Maddox)

o Move our prompt descriptor list outside of the bundle.
It's now dealt with by the `server' object. This simplifies
things as we only have one list of prompt descriptors and
the log_ routines check prompt::logactive to determine
whether it should be used for output.
o Include the MP socket UpdateSet() result in bundle::UpdateSet().
o Don't select on the tun device unless we're in NETWORK
phase or AUTO mode.
o Stop the idle timer when we go to DEAD phase. We may
have transferred a link and not had a chance to kill
it.
o Don't fail when trying to unlink our transferred datalink
from our descriptor lists just before the transfer.
o Add our link descriptor to the write set if we got a short
write the last time (physical::out is set).
o Log the connection source address when a connection is closed.
o Remove descriptor::next field. Descriptor lists are not required
any more.

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