Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

pfsync: transport over IPv6

Implement pfsync over IPv6.

Submitted by: Luiz Amaral <email@luiz.eng.br>
Submitted by: Naman Sood <naman@freebsdfoundation.org>
Reviewed by: kp
Sponsored by: InnoGames GmbH
Differential Revision: https://reviews.freebsd.org/D40102

ping: low-effort fix to make it compilable without inet

ifconfig: remove (most of) the usages of global 'struct ifreq ifr'.

It is hard to reason about the contents of 'ifr' at any given time
as nearly every function sets random fields or pointers in this
structure.
Use local on-stack clean 'struct ifreq' for each function instead.

Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D40534
MFC after: 2 weeks

ifconfig: fix warnings #2

Fix all -Wparameter-unused and cast alignment

Differential Revision: https://reviews.freebsd.org/D40303
MFC after: 2 weeks

pf: make contents of struct pfsync_state configurable

Make struct pfsync_state contents configurable by sending out new
versions of the structure in separate subheader actions. Both old and
new version of struct pfsync_state can be understood, so replication of
states from a system running an older kernel is possible. The version
being sent out is configured using ifconfig pfsync0 … version XXXX. The
version is an user-friendly string - 1301 stands for FreeBSD 13.1 (I
have checked synchronization against a host running 13.1), 1400 stands
for 14.0.

A host running an older kernel will just ignore the messages and count
them as "packets discarded for bad action".

Reviewed by: kp
Sponsored by: InnoGames GmbH
Differential Revision: https://reviews.freebsd.org/D39392

ifconfig: introduce `ifconfig_context` to store current global state.

The structure consists of all current context - arguments,
open sockets, current family and so on.

Pass this structure as a first argument to most of the af_ menthods.
This allows to propagate and update shared data without using
global variables.

The diff is pretty large, but de-facto mechanical. All changes
except the structure setup in ifconfig[_netlink].c are one-line
mechanical changes.

Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D40239
MFC after: 2 weeks

ifconfig: cleanup warnings #1

Cleanup compiler warnings in preparation to set Wextra and remove WARNS?=2

Differential Revision: https://reviews.freebsd.org/D40238
MFC after: 2 weeks

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

pfsync: prepare code to accommodate AF_INET6 family

Work is ongoing to add support for pfsync over IPv6. This required some
changes to allow for differentiating between the two families in a more
generic way.

This patch converts the relevant ioctls to using nvlists, making future
extensions (such as supporting IPv6 addresses) easier.

Sponsored by: InnoGames GmbH
Differential Revision: https://reviews.freebsd.org/D36277

pfsync: fix incorrect enabling of defer mode

When we exposed the PFSYNCF_OK flag to userspace in 5f5bf88949d we
unintentionally caused defer mode to always be enabled.
The ioctl check only looked for nonzero, not for the PFSYNCF_DEFER flag.

Fix this check and ensure ifconfig sets the flag.

Reviewed by: glebius
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D33244

pfsync: Expose PFSYNCF_OK flag to userspace

Add 'syncok' field to ifconfig's pfsync interface output. This allows
userspace to figure out when pfsync has completed the initial bulk
import.

Reviewed by: donner
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29948

ifconfig: fix endianness bug displaying pfsync interfaces

Reviewed by: kp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D19005

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

Various Coverity fixes in ifconfig(8)

* Exit early if kldload(2) fails (1011259). This is the only change that
affects ifconfig's behavior.
* Close memory and resource leaks (1305624, 1305205, 1007100)
* Mark usage() as _Noreturn (1305806, 1305750)
* Fix some dereference after null checks (1011474, 270774)

Reported by: Coverity
CID: 1305624, 1305205, 1007100, 1305806, 1305750, 1011474,
CID: 270774, 1011259
Reviewed by: cem
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D10587

Replace N #defines with nitems to simplify ifconfig code slightly

MFC after: 1 week

Make it possible to switch pfsync(4) deferral mechanism on/off.

Obtained from: OpenBSD

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Print pfsync interface status if either syncpeer or syncdev is configured.

Update ifconfig's pfsync module for 3.7 pfsync(4)

Use afswch->af_other_status for carp_status() and pfsync_status().

Sponsored by: Rambler

Add CARP (Common Address Redundancy Protocol), which allows multiple
hosts to share an IP address, providing high availability and load
balancing.

Original work on CARP done by Michael Shalayeff, with many
additions by Marco Pfatschbacher and Ryan McBride.

FreeBSD port done solely by Max Laier.

Patch by: mlaier
Obtained from: OpenBSD (mickey, mcbride)