sctp: improve sending of packets containing an INIT ACK chunk

If the peer announced support of zero checksums, do so when sending
packets containing an INIT ACK chunk.

MFC after: 1 week

sctp: cleanup cdefs.h include

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

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

sctp: cleanup the SCTP_MAXSEG socket option.

This patch makes the handling of the SCTP_MAXSEG socket option
compliant with RFC 6458 (SCTP socket API) and fixes an issue
found by syzkaller.

Reported

sctp: cleanup the SCTP_MAXSEG socket option.

This patch makes the handling of the SCTP_MAXSEG socket option
compliant with RFC 6458 (SCTP socket API) and fixes an issue
found by syzkaller.

Reported by: syzbot+a2791b89ab99121e3333@syzkaller.appspotmail.com
MFC after: 3 days

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Whitespace changes.

MFC after: 3 days

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

Non-functional changes due to upstream cleanup.

MFC after: 1 week

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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Merge ^/head r351317 through r351731.

Improve the handling of state cookie parameters in INIT-ACK chunks.
This fixes problem with parameters indicating a zero length or partial
parameters after an unknown parameter indicating to stop pro

Improve the handling of state cookie parameters in INIT-ACK chunks.
This fixes problem with parameters indicating a zero length or partial
parameters after an unknown parameter indicating to stop processing. It
also fixes a problem with state cookie parameters after unknown
parametes indicating to stop porcessing.
Thanks to Mark Wodrich from Google for finding two of these issues
by fuzz testing the userland stack and reporting them in
https://github.com/sctplab/usrsctp/issues/355
and
https://github.com/sctplab/usrsctp/issues/352

MFC after: 3 days

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Whitespace changes due to changes in ident.

Revert https://svnweb.freebsd.org/changeset/base/336503
since I also ran the export script with different parameters.

Whitespace changes due to change if ident.

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 r323559 through r325504.

MFhead@r320180

Code cleanup, no functional change.

MFC after: 1 week

MFhead@r320180

Merge ^/head r319973 through 321382.

Merge ^/head r320994 through r321238.

Fix the handling of Explicit EOR mode.

While there, appropriately handle the overhead depending on
the usage of DATA or I-DATA chunks. Take the overhead only
into account, when required.

Joint work

Fix the handling of Explicit EOR mode.

While there, appropriately handle the overhead depending on
the usage of DATA or I-DATA chunks. Take the overhead only
into account, when required.

Joint work with rrs@
MFC after: 1 week

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Whitespace changes.

The toolchain for processing the sources has been updated. No functional
change.

MFC after: 3 days

Merge ^/head r294961 through r295350.

MfH @r295202

Expect to see panics in routing code at least now.