Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Add __unused. Ansi prototypes.

Add volatile to sig_atomic_t where it was missing.

MFC after: 1 week

Modify the DoParseCommand() to work on (const char *) instead of just
(char *). This is a slightly simplified version of the patch in the PR. It
fixes compilitation issues with -O3.

PR: misc/124385

getopt(3) returns -1, not EOF.

- Pass pointer to fd_set in ReadSockets.
- style(9) nits.

Submitted by: ru

Add line edit and history support to ngctl(8) via editline(3).

Details:
- The main thread runs editline(3) functions, that can block.
- A separate thread is launched to monitor netgraph sockets.
- The access to the descriptors is protected by a mutex. At
runtime the monitoring thread owns the mutex. When the main
thread reads a command from el_gets() it asks the monitoring
thread to release a mutex and sleep until the main thread
processes the command.

This makes ngctl(8) depend on libedit, and libpthread. Thus, the
new functionality isn't compiled in if release is being built
with -DRELEASE_CRUNCH.

PR: bin/87352
Reviewed by: ru, Nuno Antunes <nuno.antunes gmail.com>

Style: space after "return".

Unnest includes before forthcoming editing.

Backout rev. 1.17 per ru@ request: there are net.graph.recvspace and
net.graph.maxdgram sysctls.

Increase a socket receive buffer size. This helps 'ngctl list'
to deal with a big number of nodes.

Submitted by: archie
Approved by: archie
Reported and tested: Konstantin Timashkov
MFC after: 1 month

Get rid of all (but one in write.c) static size buffers.

Make this WARNS=3 clean.

Add a GraphViz-exporting ngctl(8) "dot" command. You can now create
very useful .dot files of your netgraph(4) to quickly visualize the
nodes, hooks and edges. An example of this can be found here:
http://people.freebsd.org/~green/sample-netgraph-dot.ps
If anyone would like to refine the output further, please do so.

Use fprintf() instead of errx() when displaying usage string. The program name
will not be written twice.

Get rid of the old constants which did not include the trailing NUL
and use the new constants which do.

Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.

Add ngctl "write" command.

MFC after: 1 week

Backout my previous commit, it appearantly doesn't work for asynchronous
messages.

Add -ledit to ngctl.

Somebody submitted this long time ago, and it has been sitting in my
tree for months because I thought archie would pick it up.

Submitted by: (sorry, lost track)

Fix bug in "read" command.

Submitted by: Dave Cornelius <dc@packetdesign.com>

Experiemntal ascii based device configuration mechanism.

This may or may not survive, decision will be made well before 5.0-R

When the 'msg' command is used from the command line, check for a
synchronous reply, and display it (if any) before exiting.

Requested by: phk

No need to try loading ng_socket.ko, as NgMkSockNode() does that
for us now if necessary.

Add two new generic control messages, NGM_ASCII2BINARY and
NGM_BINARY2ASCII, which convert control messages to ASCII and back.
This allows control messages to be sent and received in ASCII form
using ngctl(8), which makes ngctl a lot more useful.

This also allows all the type-specific debugging code in libnetgraph
to go away -- instead, we just ask the node itself to do the ASCII
translation for us.

Currently, all generic control messages are supported, as well as
messages associated with the following node types: async, cisco,
ksocket, and ppp.

See /usr/share/examples/netgraph/ngctl for an example of using this.

Also give ngctl(8) the ability to print out incoming data and
control messages at any time. Eventually nghook(8) may be subsumed.

Several other misc. bug fixes.

Reviewed by: julian

If we get an EPROTONOSUPP error when trying to create the netgraph socket
node, it's most likely because the "ng_socket.ko" KLD is not loaded yet.
So make an attempt to load it before giving up.

Whistle's Netgraph link-layer (sometimes more) networking infrastructure.
Been in production for 3 years now. Gives Instant Frame relay to if_sr
and if_ar drivers, and PPPOE support soon. See:
ftp://ftp.whistle.com/pub/archie/netgraph/index.html
for on-line manual pages.

Reviewed by: Doug Rabson (dfr@freebsd.org)
Obtained from: Whistle CVS tree