sctp: cleanup cdefs.h include

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

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

sctp: initial implementation of draft-tuexen-tsvwg-sctp-zero-checksum

sctp: fix typos

Thanks to David Sanders for fixing the typos in the userland stack.

MFC after: 3 days

Improve the handling of cookie life times.
The staleness reported in an error cause is in us, not ms.
Enforce limits on the life time via sysct; and socket options
consistently. Update the descriptio

Improve the handling of cookie life times.
The staleness reported in an error cause is in us, not ms.
Enforce limits on the life time via sysct; and socket options
consistently. Update the description of the sysctl variable to
use the right unit. Also do some minor cleanups.
This also fixes an interger overflow issue if the peer can
modify the cookie. This was reported by Felix Weinrank by fuzz testing
the userland stack and in
https://oss-fuzz.com/testcase-detail/4800394024452096

MFC after: 3 days

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net: clean up empty lines in .c and .h files

Retire SCTP_SO_LOCK_TESTING.

This was intended to test the locking used in the MacOS X kernel on a
FreeBSD system, to make use of WITNESS and other debugging infrastructure.
This hasn't been used fo

Retire SCTP_SO_LOCK_TESTING.

This was intended to test the locking used in the MacOS X kernel on a
FreeBSD system, to make use of WITNESS and other debugging infrastructure.
This hasn't been used for ages, to take it out to reduce the #ifdef
complexity.

MFC after: 1 week

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Make the message size limit used for SCTP_SENDALL configurable via
a sysctl variable instead of a compiled in constant.

This is based on a patch provided by nwhitehorn@.

Merge ^/head r339670 through r339812.

Add initial descriptions for SCTP related MIB variable.
This work was mostly done by Marie-Helene Kvello-Aune.

MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D3583

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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Retire net.inet.sctp.strict_sacks and net.inet.sctp.strict_data_order
sysctl's, since they where only there to interop with non-conformant
implementations. This should not be a problem anymore.

Enable SACK Immediately per default.

This has been tested for a long time and implements covered by RFC 7053.

MFC after: 1 week

A couple of minor changes that I missed that Michael had done, most noted
in these is the change to non-strict ordering for incoming data (this will
make pkt-drill test 14 fail but its expected).

This is work done by Michael Tuexen and myself at the IETF. This
adds the new I-Data (Interleaved Data) message. This allows a user
to be able to have complete freedom from Head Of Line blocking that

This is work done by Michael Tuexen and myself at the IETF. This
adds the new I-Data (Interleaved Data) message. This allows a user
to be able to have complete freedom from Head Of Line blocking that
was previously there due to the in-ability to send multiple large
messages without the TSN's being in sequence. The code as been
tested with Michaels various packet drill scripts as well as
inter-networking between the IETF's location in Argentina and Germany.

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Merge from head

Sponsored by: Gandi.net

Merge from head

Merge from head

Sync up with head (up to r288341).

Merge ^/head r287680 through r287877.

Remove redundant 'man page'

Reviewed by: allanjude

Finish merging from head, messed up in previous attempt

Merge ^/head r287527 through r287679.

Merge r286744-r287584 from head.