CVS commit: src/sys/netinet6

[David Young <dyoung%netbsd.org@localhost>]

Module Name:    src
Committed By:   dyoung
Date:           Fri Nov  6 20:41:22 UTC 2009

Modified Files:
        src/sys/netinet6: nd6.c nd6.h nd6_rtr.c

Log Message:
Fix net.inet6.ip6.accept_rtadv and 'ndp -i <interface> accept_rtadv':

Add a flag ND6_IFF_OVERRIDE_RTADV that tells the kernel to override
ip6_accept_rtadv (net.inet6.ip6.accept_rtadv) on an interface.

Add a routine nd6_accepts_rtadv(ndi) that evaluates both the flags
on the interface represented by ndi and ip6_accept_rtadv, and
returns 'true' if the given interface should accept Router
Advertisements, and 'false' if not.

Now, ND6_IFF_ACCEPT_RTADV works as it was historically documented:
if it is set, then accept router advertisements iff ip6_accept_rtadv
!= 0.  Otherwise, do not accept router advertisements.

If ND6_IFF_OVERRIDE_RTADV is set, then the flag ND6_IFF_ACCEPT_RTADV
overrides ip6_accept_rtadv: if ND6_IFF_ACCEPT_RTADV is set, accept;
otherwise reject.  Ignore ip6_accept_rtadv.

If neither ND6_IFF_ACCEPT_RTADV nor ND6_IFF_OVERRIDE_RTADV is set,
reject Router Advertisements.


To generate a diff of this commit:
cvs rdiff -u -r1.134 -r1.135 src/sys/netinet6/nd6.c
cvs rdiff -u -r1.52 -r1.53 src/sys/netinet6/nd6.h
cvs rdiff -u -r1.79 -r1.80 src/sys/netinet6/nd6_rtr.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.