CVS log for src/sys/netinet/tcp.h

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Keyword substitution: kv
Default branch: MAIN

Sync with HEAD.

CTASSERT -> __CTASSERT to unbreak userland build.

While here move __packed in tcp_debug.h back to where it was and
note removal warrants more investigation.

Sprinkle CTASSERT to enforce on-wire layout without __packed

Remove __packed from various network structures

They are already network aligned and adding the __packed attribute
just causes needless compiler warnings about accssing members of packed
objects.

Mostly merge changes from HEAD upto 20200411

Add comments to the tcp flags.

update from HEAD

Sync with HEAD

Sync with HEAD

add a couple of lint comments.

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Fix TCP signature code:
1. pack options more tightly instead of being generous with no/op
2. put TCP_SIGNATURE option before SACK
3. fix computation of options length, by deferring it
XXX: Really we should move the options setting code in one place instead
of having two copies one for input and one for output.
XXX: tcp_optlen/tcp_hdrsiz need to be fixed; they were wrong before too.

Sync with HEAD

Pull up following revision(s) (requested by he in ticket #530):
	sys/netinet/tcp_output.c: revision 1.180
	sys/netinet/tcp_input.c: revision 1.336
	sys/netinet/tcp_usrreq.c: revision 1.203
	share/man/man4/tcp.4: revision 1.30
	sys/netinet/tcp.h: revision 1.31
	sys/netinet/tcp_subr.c: revision 1.258
	sys/netinet/tcp_var.h: revision 1.176
	sys/netinet/tcp_var.h: revision 1.177
	sys/sys/param.h: bump revision

Port over the TCP_INFO socket option from FreeBSD, originally from
the Linux 2.6 TCP API.  This permits the caller to query certain information
about a TCP connection, and is used by pkgsrc's net/iperf3 test program
if available.

This extends struct tcbcb with three fields to count retransmits,
out-of-sequence receives and zero window announcements, and will
therefore warrant a kernel revision bump (done separately).

Change the new counter variables in struct tcpcb to uint32_t, as
per christos' comments.

Port over the TCP_INFO socket option from FreeBSD, originally from
the Linux 2.6 TCP API.  This permits the caller to query certain information
about a TCP connection, and is used by pkgsrc's net/iperf3 test program
if available.

This extends struct tcbcb with three fields to count retransmits,
out-of-sequence receives and zero window announcements, and will
therefore warrant a kernel revision bump (done separately).

sync with head

merge to -current.

make standalone

u_int -> uint

Sync with HEAD.

sync with head

sync with HEAD

Sync with HEAD

Sync with head.

Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

sync with head.

Sync with HEAD.

Sync with HEAD.

TCP socket buffers automatic sizing - ported from FreeBSD.
http://mail-index.netbsd.org/tech-net/2007/02/04/0006.html

! Disabled by default, marked as experimental. Testers are very needed.
! Someone should thoroughly test this, and improve if possible.

Discussed on <tech-net>:
http://mail-index.netbsd.org/tech-net/2007/07/12/0002.html
Thanks Greg Troxel for comments.

OK by the long silence on <tech-net>.

file tcp.h was added on branch matt-mips64 on 2007-08-02 02:42:41 +0000

TCP socket buffers automatic sizing - ported from FreeBSD.
http://mail-index.netbsd.org/tech-net/2007/02/04/0006.html

! Disabled by default, marked as experimental. Testers are very needed.
! Someone should thoroughly test this, and improve if possible.

Discussed on <tech-net>:
http://mail-index.netbsd.org/tech-net/2007/07/12/0002.html
Thanks Greg Troxel for comments.

OK by the long silence on <tech-net>.

Sync with head.

Sync with head.

- per socket keepalive settings
- settable connection establishment timeout

sync with head.

Sync with head.

sync with head

Modular (I tried ;-) TCP congestion control API. Whenever certain conditions
happen in the TCP stack, this interface calls the specified callback to
handle the situation according to the currently selected congestion
control algorithm.
A new sysctl node was created: net.inet.tcp.congctl.{available,selected}
with obvious meanings.
The old net.inet.tcp.newreno MIB was removed.
The API is discussed in tcp_congctl(9).

In the near future, it will be possible to selected a congestion control
algorithm on a per-socket basis.

Discussed on tech-net and reviewed by <yamt>.

Remove line that shouldn't have been committed.

PR/14806: NetBSD uses the wrong default TCP MSS.
No objections in tech-net.

sync with head.

sync with head

Import of TCP ECN algorithm for congestion control.
Both available for IPv4 and IPv6.
Basic implementation test results are available at
http://netbsd-soc.sourceforge.net/projects/ecn/testresults.html.

Work sponsored by the Google Summer of Code project 2006.
Special thanks to Kentaro Kurahone, Allen Briggs and Matt Thomas for their
help, comments and support during the project.

sync with head.

Sync with head.

Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

Sync with HEAD. Here we go again...

Add a definition for TCPOLEN_SIGLEN from OpenBSD, so a kernel with
options TCP_SIGNATURE will compile again after the new PMTU checks
were brought in from OpenBSD.  Approved by christos.

sync with -current

sync with head.  xen and whitespace.  xen part is not finished.

Sync with HEAD.

tcp_sack_option: the max number of sack blocks in a packet is 4, not 3.

Sync with HEAD.

remove TCPOPT_MD5SIGNATURE because no one in our tree uses it
and it's duplicated with TCPOPT_SIGNATURE.
i preferred TCPOPT_SIGNATURE because it's used by FreeBSD and OpenBSD.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Add definitions for the (currently unimplemented) ECN TCP flags;
from Chuck Swiger in PR standards/25058.

Initial commit of a port of the FreeBSD implementation of RFC 2385
(MD5 signatures for TCP, as used with BGP).  Credit for original
FreeBSD code goes to Bruce M. Simpson, with FreeBSD sponsorship
credited to sentex.net.  Shortening of the setsockopt() name
attributed to Vincent Jardin.

This commit is a minimal, working version of the FreeBSD code, as
MFC'ed to FreeBSD-4. It has received minimal testing with a ttcp
modified to set the TCP-MD5 option; BMS's additions to tcpdump-current
(tcpdump -M) confirm that the MD5 signatures are correct.  Committed
as-is for further testing between a NetBSD BGP speaker (e.g., quagga)
and industry-standard BGP speakers (e.g., Cisco, Juniper).


NOTE: This version has two potential flaws. First, I do see any code
that verifies recieved TCP-MD5 signatures.  Second, the TCP-MD5
options are internally padded and assumed to be 32-bit aligned. A more
space-efficient scheme is to pack all TCP options densely (and
possibly unaligned) into the TCP header ; then do one final padding to
a 4-byte boundary.  Pre-existing comments note that accounting for
TCP-option space when we add SACK is yet to be done. For now, I'm
punting on that; we can solve it properly, in a way that will handle
SACK blocks, as a separate exercise.

In case a pullup to NetBSD-2 is requested, this adds sys/netipsec/xform_tcp.c
,and modifies:

sys/net/pfkeyv2.h,v 1.15
sys/netinet/files.netinet,v 1.5
sys/netinet/ip.h,v 1.25
sys/netinet/tcp.h,v 1.15
sys/netinet/tcp_input.c,v 1.200
sys/netinet/tcp_output.c,v 1.109
sys/netinet/tcp_subr.c,v 1.165
sys/netinet/tcp_usrreq.c,v 1.89
sys/netinet/tcp_var.h,v 1.109
sys/netipsec/files.netipsec,v 1.3
sys/netipsec/ipsec.c,v 1.11
sys/netipsec/ipsec.h,v 1.7
sys/netipsec/key.c,v 1.11
share/man/man4/tcp.4,v 1.16
lib/libipsec/pfkey.c,v 1.20
lib/libipsec/pfkey_dump.c,v 1.17
lib/libipsec/policy_token.l,v 1.8
sbin/setkey/parse.y,v 1.14
sbin/setkey/setkey.8,v 1.27
sbin/setkey/token.l,v 1.15

Note that the preceding two revisions to tcp.4 will be
required to cleanly apply this diff.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

Header cleanup: Hide all of this file apart from the socket options
from POSIX/XNS applications.

Catch up to -current.

Add TCP_MD5SIGNATURE option.

Update thorpej_scsipi to -current as of a month ago

added a linted comment about non-portable bitfields. Unfortunately it cannot
be fixed portably.

Pull up to last week's -current.

Add the `packed' attribute to structures which describe wire protocol data.

Adapt the NEWRENO changes from the UCSB diffs of BSDI 3.0's TCP
to NetBSD.  Ignore the SACK & FACK stuff for now.

add/cleanup multiple inclusion protection.

Import sys/netinet from 4.4BSD-Lite for reference purposes.

spacing cleaup. also, minor type mixup fixups.

be a bit more careful and explicit with types.  (basically a large no-op.)

New RCS ID's, take two.  they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Fix some inconsistent spacing; spaces at the end of lines, etc.

more rcsid additions and file header cleanups

Add consistent multiple-inclusion protection.

initial import of 386bsd-0.1 sources

Initial revision