udp: Add a sysctl to modify listening socket FIB inheritance

Introduce the net.inet.udp.bind_all_fibs tunable, set to 1 by default
for compatibility with current behaviour. When set to 0, all recei

udp: Add a sysctl to modify listening socket FIB inheritance

Introduce the net.inet.udp.bind_all_fibs tunable, set to 1 by default
for compatibility with current behaviour. When set to 0, all received
datagrams will be dropped unless an inpcb bound to the same FIB exists.

No functional change intended, as the new behaviour is not enabled by
default.

Reviewed by: glebius
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D48664

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share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

inet.4 icmp.4 udp.4: Add missing sysctls, other fixes

Add missing sysctls to inet.4 and icmp.4, using references to ip.4
for variables and groups documented there. Add sysctl.8 to "see also"
and in

inet.4 icmp.4 udp.4: Add missing sysctls, other fixes

Add missing sysctls to inet.4 and icmp.4, using references to ip.4
for variables and groups documented there. Add sysctl.8 to "see also"
and intro to variable section. Rename "MIB Variables" section to
"MIB (sysctl) Variables", as most people will associate with sysctl.
Revise history: the ICMP implementation was in 4.2BSD.

Reviewed by: manpages(pauamma)
Differential Revision: https://reviews.freebsd.org/D36003

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icmp.4 inet.4 udp.4: sort sysctl variables

Sort the sysctl(3)/sysctl(8) variables in the MIB Variables section
alphabetically. This is in preparation for adding missing variables
(at least in inet.

icmp.4 inet.4 udp.4: sort sysctl variables

Sort the sysctl(3)/sysctl(8) variables in the MIB Variables section
alphabetically. This is in preparation for adding missing variables
(at least in inet.4 and icmp.4). A few other touchups suggested in
review.

Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D35843
MFC after: 1 week

(cherry picked from commit 3b656d465127de066511b6ffd02fb9fef85c7a53)

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inet.4 tcp.4 udp.4: update date, fix typo

Update .Dd for man pages pushed yesterday; fix typo in inet.4.

inet.4 tcp.4 udp.4: Replace *CTL_* OID macro names with sysctl names

Older sysctls with constant OID macros were identified with those
in inet.4, tcp.4, and udp.4; newer sysctls with automatic numbe

inet.4 tcp.4 udp.4: Replace *CTL_* OID macro names with sysctl names

Older sysctls with constant OID macros were identified with those
in inet.4, tcp.4, and udp.4; newer sysctls with automatic numbering
were identified by sysctl names. No one remembers the OID macros,
or knows what they are; sysctls are always done by name now, usually
via sysctl(8).

Replace the OID macro names with sysctl names so that there is one
uniform identifier type; sysctl names were previously in parens.
Make the formatting a little more consistent in this area. In inet.4
and udp.4, move the "ip." or "udp." prefix from each entry into the
top-level name at the start of the section, as they are all the same.

Reviewed by: rpokala
Differential Revision: https://reviews.freebsd.org/D35806

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Merge ^/head r313301 through r313643.

MFhead@r313360

Merge projects/ipsec into head/.

Small summary
-------------

o Almost all IPsec releated code was moved into sys/netipsec.
o New kernel modules added: ipsec.ko and tcpmd5.ko. New kernel
option

Merge projects/ipsec into head/.

Small summary
-------------

o Almost all IPsec releated code was moved into sys/netipsec.
o New kernel modules added: ipsec.ko and tcpmd5.ko. New kernel
option IPSEC_SUPPORT added. It enables support for loading
and unloading of ipsec.ko and tcpmd5.ko kernel modules.
o IPSEC_NAT_T option was removed. Now NAT-T support is enabled by
default. The UDP_ENCAP_ESPINUDP_NON_IKE encapsulation type
support was removed. Added TCP/UDP checksum handling for
inbound packets that were decapsulated by transport mode SAs.
setkey(8) modified to show run-time NAT-T configuration of SA.
o New network pseudo interface if_ipsec(4) added. For now it is
build as part of ipsec.ko module (or with IPSEC kernel).
It implements IPsec virtual tunnels to create route-based VPNs.
o The network stack now invokes IPsec functions using special
methods. The only one header file <netipsec/ipsec_support.h>
should be included to declare all the needed things to work
with IPsec.
o All IPsec protocols handlers (ESP/AH/IPCOMP protosw) were removed.
Now these protocols are handled directly via IPsec methods.
o TCP_SIGNATURE support was reworked to be more close to RFC.
o PF_KEY SADB was reworked:
- now all security associations stored in the single SPI namespace,
and all SAs MUST have unique SPI.
- several hash tables added to speed up lookups in SADB.
- SADB now uses rmlock to protect access, and concurrent threads
can do SA lookups in the same time.
- many PF_KEY message handlers were reworked to reflect changes
in SADB.
- SADB_UPDATE message was extended to support new PF_KEY headers:
SADB_X_EXT_NEW_ADDRESS_SRC and SADB_X_EXT_NEW_ADDRESS_DST. They
can be used by IKE daemon to change SA addresses.
o ipsecrequest and secpolicy structures were cardinally changed to
avoid locking protection for ipsecrequest. Now we support
only limited number (4) of bundled SAs, but they are supported
for both INET and INET6.
o INPCB security policy cache was introduced. Each PCB now caches
used security policies to avoid SP lookup for each packet.
o For inbound security policies added the mode, when the kernel does
check for full history of applied IPsec transforms.
o References counting rules for security policies and security
associations were changed. The proper SA locking added into xform
code.
o xform code was also changed. Now it is possible to unregister xforms.
tdb_xxx structures were changed and renamed to reflect changes in
SADB/SPDB, and changed rules for locking and refcounting.

Reviewed by: gnn, wblock
Obtained from: Yandex LLC
Relnotes: yes
Sponsored by: Yandex LLC
Differential Revision: https://reviews.freebsd.org/D9352

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MFC @ r266724

An SVM update will follow this.

Merge head

IFC @264767

Merge head up to r263906.

multiple: Remove 3rd clause from BSD license where approved by the
regents and renumber.

This patch skips files in contrib/ and crypto/

Acked by: imp
Discussed with: emaste

IFC @253398

Merge fresh head.

sync from head

MFC @248461

Sort sections.

Expand *n't contractions.

Mechanically kill hard sentence breaks and double whitespaces.

Hiten's patchset for section four manpages, slightly edited by me.

mdoc(7) police: Use the new .In macro for #include statements.

mdoc(7) police: join split punctuation to macro calls.