Remove $FreeBSD$: two-line nroff pattern

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

MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

gre(4): Mention sysctl for nesting gre tunnels

PR: 228465
Submitted by: Sergey Akhmatov <sergey at akhmatov dot ru>
Reviewed by: bcr
Approved by: bcr
MFC after: 1 week
Differential Revision: https:

gre(4): Mention sysctl for nesting gre tunnels

PR: 228465
Submitted by: Sergey Akhmatov <sergey at akhmatov dot ru>
Reviewed by: bcr
Approved by: bcr
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D26097

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gre(4): Add a STANDARDS section

Expand the mentioned RFC in the SEE ALSO section
and reference RFC1701 and RFC1702.

PR: 240250
Reviewed by: bcr (mentor)
Approved by: bcr (mentor)
Obtained from: Ope

gre(4): Add a STANDARDS section

Expand the mentioned RFC in the SEE ALSO section
and reference RFC1701 and RFC1702.

PR: 240250
Reviewed by: bcr (mentor)
Approved by: bcr (mentor)
Obtained from: OpenBSD
MFC after: 7 days
Differential Revision: https://reviews.freebsd.org/D25504

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Add GRE-in-UDP encapsulation support as defined in RFC8086.

This GRE-in-UDP encapsulation allows the UDP source port field to be
used as an entropy field for load-balancing of GRE traffic in transit

Add GRE-in-UDP encapsulation support as defined in RFC8086.

This GRE-in-UDP encapsulation allows the UDP source port field to be
used as an entropy field for load-balancing of GRE traffic in transit
networks. Also most of multiqueue network cards are able distribute
incoming UDP datagrams to different NIC queues, while very little are
able do this for GRE packets.

When an administrator enables UDP encapsulation with command
`ifconfig gre0 udpencap`, the driver creates kernel socket, that binds
to tunnel source address and after udp_set_kernel_tunneling() starts
receiving of all UDP packets destined to 4754 port. Each kernel socket
maintains list of tunnels with different destination addresses. Thus
when several tunnels use the same source address, they all handled by
single socket. The IP[V6]_BINDANY socket option is used to be able bind
socket to source address even if it is not yet available in the system.
This may happen on system boot, when gre(4) interface is created before
source address become available. The encapsulation and sending of packets
is done directly from gre(4) into ip[6]_output() without using sockets.

Reviewed by: eugen
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D19921

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Merge from head

Sponsored by: Gandi.net

Finish merging from head, messed up in previous attempt

Merge from HEAD

Catch up with head, primarily for the 1.14.4.0 firmware.

Merge ^/head r286422 through r286684.

Fix mandoc warnings/errors.

MFC after: 1 week

Catch up with HEAD (r280229-r284686).

Merge from head

Merged ^/head r283871 through r284187.

Add example howto configure gre(4) tunnel with the same inner and
outer addresses using multiple FIBs.

X-MFC after: r282809

Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Misc mdoc fixes:

- Remove superfluous paragraph macros.
- Remove/fix empty or incorrect macros.
- Sort sections into conventional order.
- Terminate quoted strings properly.
- Remove EOL whitespace.

Merge from head@274682

Sync to HEAD@r274297.

Overhaul if_gre(4).

Split it into two modules: if_gre(4) for GRE encapsulation and
if_me(4) for minimal encapsulation within IP.

gre(4) changes:
* convert to if_transmit;
* rework locking: protect

Overhaul if_gre(4).

Split it into two modules: if_gre(4) for GRE encapsulation and
if_me(4) for minimal encapsulation within IP.

gre(4) changes:
* convert to if_transmit;
* rework locking: protect access to softc with rmlock,
protect from concurrent ioctls with sx lock;
* correct interface accounting for outgoing datagramms (count only payload size);
* implement generic support for using IPv6 as delivery header;
* make implementation conform to the RFC 2784 and partially to RFC 2890;
* add support for GRE checksums - calculate for outgoing datagramms and check
for inconming datagramms;
* add support for sending sequence number in GRE header;
* remove support of cached routes. This fixes problem, when gre(4) doesn't
work at system startup. But this also removes support for having tunnels with
the same addresses for inner and outer header.
* deprecate support for various GREXXX ioctls, that doesn't used in FreeBSD.
Use our standard ioctls for tunnels.

me(4):
* implementation conform to RFC 2004;
* use if_transmit;
* use the same locking model as gre(4);

PR: 164475
Differential Revision: D1023
No objections from: net@
Relnotes: yes
Sponsored by: Yandex LLC

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IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28