bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

branches: 1.1.98;
New utility: ifwatchd.
Monitors the routing socket for address changes of autonomous (kernel only)
interfaces (like PPPoE) and runs up/down scripts similar to what pppd
does for its interfaces.

ifwatchd(8): remove lingering references to dhclient(8). In this case,
its replacement handles carrier detection itself. Addresses part of
PR misc/53669.

Remove the userland part of ISDN. The kernel part is untouched for now.
ipppctl was actually an exact copy of pppoectl; there is no functional
change in pppoectl in this commit.

branches: 1.27.44; 1.27.46;
Remove trailing whitespace, replace "Ar -i" with "Fl i".

add examples for setting ipv6 default routes in ip-up/ip-down scripts

Fix preamble to match order set out by mdoc(7). Discussed with wiz.

branches: 1.24.8;
Convert TNF licenses to new 2 clause variant

branches: 1.23.24;
Sort options in SYNOPSIS.

Bump date for previous; new sentence, new line.

Document that carrier scripts are run at starttime. Bump date.

branches: 1.20.4;
Add support to call scripts at carrier detect/drop time (on network
interfaces that report this).
Basically from Brian Grayson, fixes his PR bin/23191.

New sentence, new line; limit to 80 chars lines.

Sort sections, options, grammar fix.

Clarify description of -v, following a hint from felix zaslavski.

Improve diagnostics a bit, log to syslog.

pppoe(4), not (8). Uppercase PCMCIA.

Add support for watching coming/going pccard interfaces.
Patch from KOIE Hidetaka in PR bin/20584.

The correct capitalisation of 'NetBSD.org' is (you
guessed it) 'NetBSD.org'.

some mdoc fixes.

this: singular, these: plural.

Yet another nit pick.

nit pick.

Invoke "ip-up" and "ip-down" script with parameters exactly matching
those used by pppd(8).

Fix copyright notice, sprinkle some $NetBSD$.

Whitespace nits and a typo fix.

Add more examples.

Pass the remote address (or broadcast addres) to the up/down scripts as
well. This is very usefull for setting up the right routes ;-)

Thanks to Bjoern Labitzke for pointing out this missing feature.

Sort options, fix a typo, and some minor clean-up.

Call up-scripts for interface already up on startup to account for the
late start of this daemon on system boot.
Add and document an option to prevent this.

Add RCS Id. Add Xr in some places. Whitespace fixes, drop a .Pp.
Sort sections. Fix some typos. Sort option descriptions. Mark up paths with
.Pa. Use standard headers.

New utility: ifwatchd.
Monitors the routing socket for address changes of autonomous (kernel only)
interfaces (like PPPoE) and runs up/down scripts similar to what pppd
does for its interfaces.

Don't call UP script when an IP address becomes deprecated.

branches: 1.46.6;
ifwatchd: Enable SO_RERROR to re-sync interface state.

Interface arrival, departure and link state changes will sync
and if different will be actioned.

Currently we do not track addresses, so any changes there are still lost.

ifwatchd: remove SIOCGIFDATA and SIOCGIFMEDIA ioctls

getifaddrs(3) and route(4) provide all the data we need.

ifwatchd: Check link state if no media is supported on initial ups.

We can check this via SIOCGIFDATA and ifi_link_state.

Remove case labels we will never trigger due to filtering.

branches: 1.42.10;
Use RO_MSGFILTER.

branches: 1.41.2;
CID 1373516: Missing breaks
Also delete perror, fix fprintf to be syslog.

Inhibit initial up should only apply at program start, not for hot plugged interfaces while it's running.

Remove rescan_interfaces as the interface announcement message
contains the interface index.

Simplify logic - invoke script when address is added and ready or
when removed.

We already know the interface name, so don't bother calling if_indextoname
to work it out again.

Sprinkle some RCSID loving.

Now that sppp announces address additions and removals with state
flags, we no longer need the custom sppp code to detect if we are
connected or not.

Add commentary on if we really need to handle RTM_DELADDR only when
detached.

Don't invoke scripts for INADDR_ANY or INADDR_BROADCAST addresses.

Check address is not tentative, duplicated or detached before running
scripts.

XXX Do we want new script actions for detached or duplicated addresses?

We should always know the interface the address message was for.

Add some consistency for dispatching .... always send the whole message.

Sprinkle some const.

Skip message if not our RTM_VERSION and silently ignore old message types.

Use recvmsg to ensure we get every message rather than potentially overflowing our buffer.

branches: 1.27.2;
Use unsigned, not signed, int for shifting 1 left until zero.

Signed shift into sign bit and beyond is undefined behaviour.

From Michael McConville.

static + __dead

Use RT_ROUNDUP() and friends from sys/route.h instead of homegrown
variants.

branches: 1.24.2;
Fix -Wshadow and 'setjmp clobber' warnings.

branches: 1.23.6;
Just ignore a bunch of well-known routing socket messages ifwatchd
doesn't care about to make verbose mode less noisy. When it does print
an unknown header type, also say which one it doesn't like.

branches: 1.22.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.21.4;
Cosmetic: KNF. Shorten staircases. Delete some whitespace at line
ends (makes navigation with vi more reliable).

branches: 1.20.16;
In the initial interface scan at start time, query the link status of
the interfaces and call the CARRIER script if a link is already there.
This allows me to boot my notebook with the cable pluged and
fixes PR bin/26830.

branches: 1.19.4;
Add support to call scripts at carrier detect/drop time (on network
interfaces that report this).
Basically from Brian Grayson, fixes his PR bin/23191.

Use the new SPPPGETSTATUSNCP ioctl, if supported, to avoid reporting
intermitent changes on "volatile" interfaces based on if_spppsubr.c.
This interfaces used to cause ifwatchd to call the up and down scripts
with 0.0.0.0 addresses between entering PPP phase network and IPCP
completition.

s/netbsd.org/NetBSD.org/i

Fix typo in last change (misplaced ');')

Sync usage with man page.

Improve diagnostics a bit, log to syslog.

KNF

Sync usage with man page.

Run "arrival" scripts too in the inital pass on startup.
Open the routing socket before this pass to close a small window where
we would miss messages at startup (and get state kept by the scripts
out of sync).
Patch supplied by KOIE Hidetaka in private mail.

Add support for watching coming/going pccard interfaces.
Patch from KOIE Hidetaka in PR bin/20584.

Use vfork(2) and exec(2) instead of system for performance and security
reasons.

Don't invoke the up- and down-script for link local IPv6 addresses.

Invoke "ip-up" and "ip-down" script with parameters exactly matching
those used by pppd(8).

Fix copyright notice, sprinkle some $NetBSD$.

Add, #ifdef SPPP_IF_SUPPORT, special case treatment for sys/net/if_spppsubr.c
based interfaces. Note: all other interface types work the same as before,
and no names are hardcoded.

When a if_spppsubr.c based interface is marked IFF_UP, but has not yet
reached phase NETWORK (i.e. it didn't connect yet or authentication has not
yet completed) do not call the ip-up script for it on the initial pass
over all IFF_UP interfaces.

This fixes a race condition on startup when ip-up/ip-down are statefull
and need to be called pairwise (for example if ip-up adds and ip-down
removes a default route).

Pass the remote address (or broadcast addres) to the up/down scripts as
well. This is very usefull for setting up the right routes ;-)

Thanks to Bjoern Labitzke for pointing out this missing feature.

Call up-scripts for interface already up on startup to account for the
late start of this daemon on system boot.
Add and document an option to prevent this.

Add $NetBSD$, remove unneeded includes.

New utility: ifwatchd.
Monitors the routing socket for address changes of autonomous (kernel only)
interfaces (like PPPoE) and runs up/down scripts similar to what pppd
does for its interfaces.