netinet: Define IPv6 ECN mask

Define a mask for the code point used for ECN in the Traffic Class field
(2 bits) of an IPv6 header.

BE: 0 0 3 0 0 0 0

netinet: Define IPv6 ECN mask

Define a mask for the code point used for ECN in the Traffic Class field
(2 bits) of an IPv6 header.

BE: 0 0 3 0 0 0 0 0
Bit: 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| Traffic Class | Flow Label |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... |

For BE (Big Endian), or network-byte order, this corresponds to 0x00300000.
For Little Endian, it corresponds to 0x00003000.

Reviewed by: imp, markj
MFC after: 1 week
Pull Request: https://github.com/freebsd/freebsd-src/pull/879

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sys: 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 s

sys: 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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sys: Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

netinet6: make IPv6 fragment TTL per-VNET configurable.

Having it configurable adds more flexibility, especially
for the systems with low amount of memory.
Additionally, it allows to speedup frag6/

netinet6: make IPv6 fragment TTL per-VNET configurable.

Having it configurable adds more flexibility, especially
for the systems with low amount of memory.
Additionally, it allows to speedup frag6/ tests execution.

Reviewed by: kp, markj, bz
Differential Revision: https://reviews.freebsd.org/D35755
MFC after: 2 weeks

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tcp: use IPV6_FLOWLABEL_LEN

Avoid magic numbers when handling the IPv6 flow ID for
DSCP and ECN fields and use the named variable instead.

Reviewed By: tuexen, #transport
Sponsored by: NetApp, In

tcp: use IPV6_FLOWLABEL_LEN

Avoid magic numbers when handling the IPv6 flow ID for
DSCP and ECN fields and use the named variable instead.

Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D39503

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net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros

Introduce convenience macros to retrieve the DSCP, ECN or traffic class
bits from an IPv6 header.

Use them where appropriate.

net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros

Introduce convenience macros to retrieve the DSCP, ECN or traffic class
bits from an IPv6 header.

Use them where appropriate.

Reviewed by: ae (previous version), rscheff, tuexen, rgrimes
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29056

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Merge ^/head r358466 through r358677.

Remove stale definitions. The removed definitions are not used right
now and are incompatible with the correct ones in RFC 3168.

Submitted by: Richard Scheffenegger
Differential Revision: https://r

Remove stale definitions. The removed definitions are not used right
now and are incompatible with the correct ones in RFC 3168.

Submitted by: Richard Scheffenegger
Differential Revision: https://reviews.freebsd.org/D23903

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Remove now unused IPv6 macros and update docs.

After r354748-354750 all uses of the IP6_EXTHDR_CHECK() and
IP6_EXTHDR_GET() macros are gone from the kernel. IP6_EXTHDR_GET0()
was unused. Remove th

Remove now unused IPv6 macros and update docs.

After r354748-354750 all uses of the IP6_EXTHDR_CHECK() and
IP6_EXTHDR_GET() macros are gone from the kernel. IP6_EXTHDR_GET0()
was unused. Remove the macros and update the documentation.

Sponsored by: Netflix

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carp: Set DSCP value CS7

Update carp to set DSCP value CS7(Network Traffic) in the flowlabel field of
packets by default. Currently carp only sets TOS_LOWDELAY in IPv4 which was
deprecated in 1998.

carp: Set DSCP value CS7

Update carp to set DSCP value CS7(Network Traffic) in the flowlabel field of
packets by default. Currently carp only sets TOS_LOWDELAY in IPv4 which was
deprecated in 1998. This also implements sysctl that can revert carp back to
it's old behavior if desired.

This will allow implementation of QOS on modern network devices to make sure
carp packets aren't dropped during interface contention.

Submitted by: Nick Wolff <darkfiberiru AT gmail.com>
Reviewed by: kp, mav (earlier version)
Differential Revision: https://reviews.freebsd.org/D14536

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Merge ^/head r325999 through r326131.

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

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.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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Merge from head@274682

Reintegrate head@r273095

Sponsored by: The FreeBSD Foundation

Merge HEAD@r272944.

IFC @r272887

Sync to HEAD@r272609.

Eliminate use of M_EXT in IP6_EXTHDR_CHECK() by trimming a redundant
'if'/'else' case: it matches the simple 'else' case that follows.

This reduces awareness of external-storage mechanics outside of

Eliminate use of M_EXT in IP6_EXTHDR_CHECK() by trimming a redundant
'if'/'else' case: it matches the simple 'else' case that follows.

This reduces awareness of external-storage mechanics outside of the
mbuf allocator.

Reviewed by: bz
MFC after: 3 days
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D900

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IFC @ r254014

IFC @253398

Merge fresh head.

sync from head

Use IP6STAT_INC/IP6STAT_DEC macros to update ip6 stats.

MFC after: 1 week