Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

sys/net*: minor spelling fixes.

No functional change.

Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
- Struct arpcom is no longer referenced in normal interface code.
Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
To enforce this ac_enaddr has been renamed to _ac_enaddr.
- The second argument to ether_ifattach is now always the mac address
from driver private storage rather than sometimes being ac_enaddr.

Reviewed by: sobomax, sam

/* -> /*- for license, minor formatting changes

Add FR support to sppp (MFCronyx).

Silence on: net@, current@, hackers@.
No objections: joerg

Requested by: by many (mostly Cronyx) users for a long long time.
MFC after: 10 days

PR: kern/21771, kern/66348

Make sppp MPSAFE.
MPSAFE could be turned off by IFF_NEEDSGIANT.

Silence on: net@, current@, hackers@.
No objections: joerg

Implement an option to administratively disable the negotiation of
IPv6 on an sppp interface. In an IPv6-enabled kernel, every IPv6
interface automatically gets an IPv6 address assigned (and IPv6
multicast packets sent at initialization time). For sppp links where
we know our remote peer wouldn't support IPv6 at all, there's no point
in attempting to negotiate IPV6CP (or to even dial out for an IPv6
packet at all for dial-on-demand interfaces).

I wish there were a more generic way to administratively disable IPv6
on an interface instead. ume told me there isn't.

While i was at it, converted both, enable_vj and enable_ipv6 into flag
bits in struct sppp (enable_vj used to be an int of its own).

MFC after: 1 month

Bump AUTHNAMELEN to 64. Should probably be made dynamic instead.

Fix my breakage to the low-level hardware sync drivers brought by the
inclusion of VJ compression into sppp.

Now, instead of the need to include this and that and everything plus
the kitchensink in each of those drivers, struct sppp uses struct
slcompress as an opaque structure only referenced by a pointer. The
actual structure is then malloced at initialization time.

While i was at it, also fixed a bug where received VJ packets would only
be recognized if INET6 was defined.

Implement timestamps so i4b/driver/i4b_isppp.c can derive the idle
time from the PPP packets sent. This effectively merges rev 1.2 of
the old i4b_ispppsubr.c, with the exception that i eventually ended up
in debugging and fixing it so the idle time is now really
detected. ;-) (The version in i4b simply doesn't work right since it
still accounts for incoming LCP echo packets which it is supposed to
ignore for idle time considerations...)

Obtained from: i4b
MFC after: 1 month

Break out the relevant fields from struct sppp into a struct
sppp_parms that are needed for the SPPPIO[GS]DEFS ioctl commands.
This allows it to keep struct sppp inside #ifdef _KERNEL (where it
belongs), and prevents userland programs that wish to include
<net/if_sppp.h> from including the earth, the hell, and the universe
before the are able to resolve all the kernel-internal stuff that's in
struct sppp.

Discussed with: hm
MFC after: 1 month

Implement VJ header compression for sppp.

This is the logical merge of rev 1.32 of i4b's old if_spppsubr.c (which
was based on PR misc/11767), plus (i4b) rev 1.6 of i4b's if_ispppsubr.c,
albeit with numerous stylistic and cosmetic changes.

PR: misc/11767
Submitted by: i4b, Joachim Kuebart
MFC after: 1 month

Fix some pseudo-enumeration constants in the IPv6 implementation so
they are unique and thus actually usable as flagbits. I wonder how
it even worked so far...

MFC after: 1 week

Sync with recent KAME.
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
- The definitions of SADB_* in sys/net/pfkeyv2.h are still different
from RFC2407/IANA assignment because of binary compatibility
issue. It should be fixed under 5-CURRENT.
- ip6po_m member of struct ip6_pktopts is no longer used. But, it
is still there because of binary compatibility issue. It should
be removed under 5-CURRENT.

Reviewed by: itojun
Obtained from: KAME
MFC after: 3 weeks

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.

$Id$ -> $FreeBSD$

rganize the various modes (CISCO/AUTO/DEMAND/LEASED) a little bit better,
centralize the code.

Remember to call TLF/TLS on the hardware in CISCO mode.

Update sppp support to i4b level. This includes the new spppcontrol
program to set PPP options like authentication with.

Add two fields for the lower layers convenience.

(almost) null commit, recording message for previous commit:

s/_NET_IF_HDLC_H_/_NET_IF_SPPP_H_/

Unfold almost correct and hideous beyond reason, boolean expression,
making it more correct at the same time.

*** empty log message ***

Fixed yet more ioctl breakage due to the type of the `cmd' arg changing
from int to u_long but not changing here.

Jumbo patch to implement PAP and CHAP for sppp(4). Partially based on
Serge's (Cronyx's) code in the vendor branch. (FR support not yet
merged.)

Update for new callout interface.

Introduce a third queue per interface, serving only PPP control
protocol packets. This queue is the only one being enabled until
network phase has been reached.

Major overhaul of the SyncPPP layer. Basically, this comprises now a
full implementation of the sate machine as described in RFC1661, and
provides support for plugging in various control protocols. I needed
this to provide PPP support for the BISDN project (right now).

Unfortunatley, while the existing API was almost up to the point, i
needed one minor API change in order to decouple the this-layer-
started and this-layer-finished actions from the respective Up and
Down events of the lower layer. This requires two additional lines in
the attach routines of all existing lower layer interface drivers that
are using syncPPP (shortcutting these actions and events). Apart from
this, i believe i didn't change the API of all this, so everything
should plug in without too many hassles. Please report if i broke
something in the existing drivers.

For a list of features (including new ones like dial-on-demand), and
things still to be done, please refer to the man page i'll commit asap.

Encouraged by: Serge Vakulenko <vak@cronyx.ru>

Fix a bunch of spelling errors in the comment fields of
a bunch of system include files.

Another mega commit to staticize things.

This upgrades the driver for Cronyx-Sigma multiplexor boards
from version 1.2 to version 1.9.
Submitted by: Serge Vakulenko, <vak@cronyx.ru>

This commit was generated by cvs2svn to compensate for changes in r4910,
which included commits to RCS files with non-trunk default branches.

Cronyx/Sigma sync/async serial driver with PPP support
from Serge Vakulenko