sctp: cleanup cdefs.h include

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

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

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

Use an event handler to notify the SCTP about IP address changes
instead of calling an SCTP specific function from the IP code.
This is a requirement of supporting SCTP as a kernel loadable module.
This patch was developed by markj@, I tweaked a bit the SCTP related
code.

Submitted by: markj@
MFC after: 3 days

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.

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.

Whitespace changes.

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

MFC after: 3 days

Whitespace changes.

The tools using to generate the sources has been updated and produces
different whitespaces. Commit this seperately to avoid intermixing
these with real code changes.

MFC after: 3 days

Do packet logging in a consistent way.

MFC after: 3 days

Use consistent text at the begining of the files.

MFC after: 3 days

Fix unused parameter warnings.
While there, fix some whitespace issues.

MFC after: 3 months.

1) Typo correction in comments and one spacing change.
2) Mass update to all copyrights.
MFC after: 3 Months

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

MFC:
Fix a number of bugs and race conditions.
r208160: Bring back of the iterator thread. It now properly handles VNETS
having only one thread. The old timer based code was full of
LOR's and other issues.

r208852: Cleanup bug. Basically when an un-accepted socket was hanging on a
closed listener, we would leak the inp never cleaning it up

r208853: Enhance the use under invarients of the audit for locks function
and fix a bug where a close collision with a cookie being processed
would cause a crash.

r208854: Use the proper increment macros when working with the
sent_queue_retran_cnt

r208855: Align comments properly, Fix a bug where we were NOT looking at the
resend markings for control chunks and also not decrementing the
retran count which caused extra calls to retransmission. Alos add
a valid no locks call to the output routine.

r208856: Spacing issues in auth/bsd addr.

r208857: Get rid of a windows ifdef that somehow leaked in

r208863: Missing error leg returns in some failure cases

r208864: LOR fix between the iterator and sctp_inpcb_close

r208874: Don't call the sctp_inpcb_free from abort an association since you
don't know what locks you hold and a timer will take care of the
situation when the gone flag is set

r208875: sctp_inpcb_free bug - a socket under the right situation could get
stuck (from the accept queue) and never start the proper cleanup
timer)

r208876: Further enhance invariant lock validation, Fix a bug where a closed
socket and a INIT-ACK could collide and cause a crash

r208878: Clear up another bug in sctp_inpcb_free where we would end up due
to a race in freeing hit a destroy of a contended lock.

r208879: Optimize the cleanup and make some additional fixes in the sysctl
code so that it won't reference a GONE INP and crash us

r208883 & r208891: Fix so we don't open a hole between a sock lock and a call
to socantrcvmore.. we could before hit a race that would kill the
socket underneath us leading to a crash

r208897: CUM-ACK calculation was messed up. So basically large message got
broken from the original NR_sack integration.

r208902: Make sure that we don't move a bit to the NR array that is behind
the cum-ack

r208952: Use both bit maps to calculte the cum-ack.

r208953: Fix bug having to do with freeing an sctp_inpcb_free().
1) make sure not to remove the flag until you get the lock again.
2) make sure all log_closing calls hold the lock.
3) Release all the locks when everthing is done and call callout_drain
not callout_stop..

r208970: Fix some places on user allocation of a new sctp_inpcb where we run
out of resource that we make sure to NULL the so_pcb pointer.
Approved by: re - (bz@freebsd.org)

This adds back the Iterator to the sctp
code base. We now properly have ONE thread
that services all VNET's. Also we purge out
the old timer based iterator code which had
multiple LOR's and other issues.

MFC after: 3 days

- Import the HEAD csup code which is the basis for the cvsmode work.

1) Adds the rest of the VIMAGE change macros
2) Adds some __UserSpace__ on some of the common defines that
the user space code needs
3) Fixes a bug when we send up data to a user that failed. We
need to a) trim off the data chunk headers, if present, and
b) make sure the frag bit is communicated properly for the
msgs coming off the stream queues... i.e. we see if some
of the msg has been taken.

Obtained from: jeli contributed the VIMAGE changes on this pass Thanks Julain!

- Macro-izes the packed declaration in all headers.
- Vimage prep - these are major restructures to move
all global variables to be accessed via a macro or two.
The variables all go into a single structure.
- Asconf address addition tweaks (add_or_del Interfaces)
- Fix rwnd calcualtion to be more conservative.
- Support SACK_IMMEDIATE flag to skip delayed sack
by demand of peer.
- Comment updates in the sack mapping calculations
- Invarients panic added.
- Pre-support for UDP tunneling (we can do this on
MAC but will need added support from UDP to
get a "pipe" of UDP packets in.
- clear trace buffer sysctl added when local tracing on.

Note the majority of this huge patch is all the vimage prep stuff :-)

Allow SCTP to compile without INET6.
PR: 116816
Obtained from tuexen@fh-muenster.de:
MFC after: 2 weeks

- Fixes so we won't try to start a timer when we
hold a wq lock for the iterator. Panda uses a
silly recursive lock they hold through the timer.
- Add poor mans wireshark compile option..
- Allocate and start using SCTP_M_XXX for all SCTP_MALLOC() calls.
- sysctl now will get back the refcnt for viewing by onlookers.

Reviewed by: gnn

- Copyright change, cisco's silly tool wants it to say:
"Copyright (c) 2001-2007, by Cisco Systems,"
instead of
*Copyright (c) 2001-2007, Cisco Systems,"

- Also fix a few straglers that were still in 2006.

- fixed several places where we did not release INP locks.
- fixed a refcount bug in the new ifa structures.
- use vrf's from default stcb or inp whenever possible.
- Address limits raised to account for a full IP fragmented
packet (1000 addresses).
- flight size correcting updated to include one message only
and to handle case where the peer does not cumack the
next segment aka lists 1/1 in sack blocks..
- Various bad init/init-ack handling could cause a panic
since we tried to unlock the destroyed mutex. Fixes
so we properly exit when we need to destroy an assoc.
(Found by Cisco DevTest team :D)
- name rename in src-addr-selection from pass to sifa.
- route structure typedef'd to allow different platforms
and updated into sctp_os_bsd file.
- Max retransmissions a chunk can be made added.
Reviewed by: gnn

- Sysctl's move to seperate file
- moved away from ifn/ifa access to sctp_ifa/sctp_ifn
built and managed by the add-ip code.
- cleaned up add-ip code to use the iterator
- made iterator be a thread, which enables auto-asconf now.
- rewrote and cleaned up source address selection (also
made it use new structures).
- Fixed a couple of memory leaks.
- DACK now settable as to how many packets to delay as
well as time.
- connectx() to latest socket API, new associd arg.
- Fixed issue with revoking and loosing potential to
send when we inflate the flight size. We now inflate
the cwnd too and deflate it later when the revoked
chunk is sent or acked.
- Got rid of some temp debug code
- src addr selection moved to a common file (sctp_output.c)
- Support for simple VRF's (we have support for multi-vfr
via compile switch that is scrubbed from BSD but we won't
need multi-vrf until we first get VRF :-D)
- Rest of mib work for address information now done
- Limit number of addresses in INIT/INIT-ACK to
a #def (30).

Reviewed by: gnn

- most all includes (#include <>) migrate to the sctp_os_bsd.h file
- Finally all splxx() are removed
- Count error fixed in mapping array which might
cause a wrong cumack generation.
- Invariants around panic for case D + printf when no invariants.
- one-to-one model race condition fixed by using
a pre-formed connection and then completing the
work so accept won't happen on a non-formed
association.
- Some additional paranoia checks in sctp_output.
- Locks that were missing in the accept code.

Approved by: gnn

Ok, here it is, we finally add SCTP to current. Note that this
work is not just mine, but it is also the works of Peter Lei
and Michael Tuexen. They both are my two key other developers
working on the project.. and they need ata-boy's too:
****
peterlei@cisco.com
tuexen@fh-muenster.de
****
I did do a make sysent which updated the
syscall's and sysproto.. I hope that is correct... without
it you don't build since we have new syscalls for SCTP :-0

So go out and look at the NOTES, add
option SCTP (make sure inet and inet6 are present too)
and play with SCTP.

I will see about comitting some test tools I have after I
figure out where I should place them. I also have a
lib (libsctp.a) that adds some of the missing socketapi
functions that I need to put into lib's.. I will talk
to George about this :-)

There may still be some 64 bit issues in here, none of
us have a 64 bit processor to test with yet.. Michael
may have a MAC but thats another beast too..

If you have a mac and want to use SCTP contact Michael
he maintains a web site with a loadable module with
this code :-)

Reviewed by: gnn
Approved by: gnn