CVS log for src/usr.sbin/rtadvd/if.h

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Default branch: MAIN

interface indexes are unsigned

- remove extra \n from stderr logging
- add string message types
- sprinkle const

Sync with HEAD

White space police.

resync with head

sync with (a bit old) head

Remove the iflist array and store ifflags in rainfo.

Add support for SIGHUP to re-read the configuration for each interface.
If an invalid configuration is found, we continue to use the old one;
otherwise we expire the current one and then start advertising the new one.

Specififed interfaces don't have to exist at startup.
If specified interfaces arrive, load their config and start advertising.
If they depart, remove their rainfo structure and continue.

Fixes PR/43881 and PR/47311

sync with head

- sprinkle const
- malloc + memset -> calloc
- free + malloc -> realloc
- syslog("%s", strerror(errno)) -> syslog("%m")

Add RDNSS and DNSSL support, RFC6106.
Replace custom lists with TAILQ lists.
Clean up plently of signed vs unsigned warnings and set WARNS=4.

Adapted from FreeBSD.

imported Mobile IPv6 code developed by the SHISA project
(http://www.mobileip.jp/).

NDP-related improvements:
        RFC4191
	- supports host-side router-preference

	RFC3542
	- if DAD fails on a interface, disables IPv6 operation on the
          interface
	- don't advertise MLD report before DAD finishes

	Others
	- fixes integer overflow for valid and preferred lifetimes
	- improves timer granularity for MLD, using callout-timer.
	- reflects rtadvd's IPv6 host variable information into kernel
	  (router only)
	- adds a sysctl option to enable/disable pMTUd for multicast
          packets
	- performs NUD on PPP/GRE interface by default
	- Redirect works regardless of ip6_accept_rtadv
	- removes RFC1885-related code

From the KAME project via SUZUKI Shinsuke.
Reviewed by core.

sync with latest kame.
- make icmp6.h spec conformant to 2292bis-02, regarding to router reumbering
  flag bit.
- latest rtadvd.

sync with latest kame tree.
- reduce chances for signal handler rae condition
- decrease chances for misconfiguration
- feedbacks from router renumbering protocol bakeoff

pullup from main trunc (approved by releng-1-5)
sync with sys/netinet/icmp6.h change (no bitfield for router renumber).
more logging.  improve error handling/garbage collection.  sync with kame.

1.1 -> 1.2 basesrc/usr.sbin/rtadvd/dump.c
1.5 -> 1.6 basesrc/usr.sbin/rtadvd/if.c
1.3 -> 1.4 basesrc/usr.sbin/rtadvd/if.h \
    basesrc/usr.sbin/rtadvd/rtadvd.conf.5 basesrc/usr.sbin/rtadvd/timer.c \
    basesrc/usr.sbin/rtadvd/timer.h
1.4 -> 1.5 basesrc/usr.sbin/rtadvd/rrenum.c \
    basesrc/usr.sbin/rtadvd/rtadvd.h
1.8 -> 1.9 basesrc/usr.sbin/rtadvd/rtadvd.8
1.9 -> 1.10 basesrc/usr.sbin/rtadvd/rtadvd.c

sync with sys/netinet/icmp6.h change (no bitfield for router renumber).
more logging.  improve error handling/garbage collection.  sync with kame.

sync with latest kame.
- decrease warning level on missing rtadvd.conf (actually, the file
  can be omitted)
- strict prototype
- gather stats better, emit stats on SIGUSR1 to /var/run

fix for 64bit arch, where sizeof(size_t) != sizeof(int).
add NetBSD RCS ID.

rtadvd: advertise IPv6 prefix info via router advertisement.
(to be run on routers)