Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r235870

Allow the socket list to be limited to a specific jail id.

MFC r230512: sockstat: Also show sockets not associated with a descriptor.

Sockets not associated with a file descriptor include TCP TIME_WAIT states
and sockets created via the socket(9) API such as from rpc.lockd and the NFS
client.

PR: bin/164081

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Note that sockstat(1) does not display kernel-owned sockets.

Submitted by: infofarmer@
MFC after: 2 weeks

Add manual page links to advertise procstat(1) a little better.

Approved by: re (kib)

Add an -L option to ignore loopback Internet sockets.

MFC after: 2 weeks

Add support for filtering sockets by protocol type. The default
behavior of sockstat(1) will still be to show "udp", "tcp" and
"divert" protocols, but we can now provide a (comma-separated)
list of protocols, as in:

% sockstat -P tcp

to list only TCP sockets, or we can filter more than one protocol
by separating the protocol names with a comma:

% sockstat -P tcp,udp

Protocol names are parsed with getprotobyname(3), so any protocol
whose name is listed in `/etc/protocols' should work fine.

Submitted by: Josh Carroll <josh.carroll@psualum.com>
Approved by: des

Scheduled mdoc(7) sweep.

Do not display bogus entries for sockets in the TIME_WAIT or similar
states that no longer have a corresponding file descriptor - until now,
sockstat would mostly randomly match null kern.file.*.xf_data fields
with the first mostly-closed socket.

This bugfix is a RELENG_5 candidate.

Approved by: andre

mdoc(7) police: markup polishing.

Approved by: re

Rewrite sockstat(1) in C.

Sponsored by: DARPA, NAI Labs

Spell "FreeBSD" with "F" and "BSD" in uppercase.

mdoc(7) police: fix markup.

Allow the user to specify port ranges against which to match inet sockets.

Suggested by: roam

mdoc(7) police: removed HISTORY info from the .Os call.

Add (and document) options for showing only listening or connected sockets.

Prepare for mdoc(7)NG.

mdoc(7) police: added missing .Os call.

Spell the des's name correctly.

Document the fact that sockstat now lists Unix domain sockets, and the new
command-line options for selecting what to display.

Do not dot terminate list of references

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Update sockstat to support INET6 socket printing.

Approved by: jkh

Submitted by: Ben Smithurst <ben@scientia.demon.co.uk>
Reviewed by: des

Add xrefs to the {f,net,sock}stat.1 manpages. While I'm in there, fix
the sockstat.1 document title, which still remembers when sockstat was
called lsock.

Reviewed by: mpp

$Id$ -> $FreeBSD$

Use -finet option to netstat(1), and don't discard anything.
Don't truncate the protocol field.
These two changes conspire to make sockstat(1) show divert sockets.

Submitted by: ru

Rename lsock(1) to sockstat(1).

Suggested by: Sheldon Hearn <sheldonh@iafrica.com>
Approved by: Peter Wemm <peter@netplex.com.au>