scope cleanup. with this change

- most of the kernel code will not care about the actual encoding of
  scope zone IDs and won't touch "s6_addr16[1]" directly.
- similarly, most of the kernel code will not care about link-local
  scoped addresses as a special case.
- scope boundary check will be stricter.  For example, the current
  *BSD code allows a packet with src=::1 and dst=(some global IPv6
  address) to be sent outside of the node, if the application do:
    s = socket(AF_INET6);
    bind(s, "::1");
    sendto(s, some_global_IPv6_addr);
  This is clearly wrong, since ::1 is only meaningful within a single
  node, but the current implementation of the *BSD kernel cannot
  reject this attempt.

Submitted by:	JINMEI Tatuya <jinmei__at__isl.rdc.toshiba.co.jp>
Obtained from:	KAME

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/netinet6/in6_proto.c b/sys/netinet6/in6_proto.c
index 7900303..796de8d 100644
--- a/sys/netinet6/in6_proto.c
+++ b/sys/netinet6/in6_proto.c
@@ -442,6 +442,8 @@ SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
 	&rip6stat, rip6stat, "");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
 	prefer_tempaddr, CTLFLAG_RW, &ip6_prefer_tempaddr,	0, "");
+SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
+	use_defaultzone, CTLFLAG_RW, &ip6_use_defzone,		0,"");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS,
 	maxfrags, CTLFLAG_RW,		&ip6_maxfrags,	0, "");