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, 4 insertions, 1 deletions

diff --git a/sys/netinet6/ip6_var.h b/sys/netinet6/ip6_var.h
index 090dc31..68faf9b 100644
--- a/sys/netinet6/ip6_var.h
+++ b/sys/netinet6/ip6_var.h
@@ -322,6 +322,9 @@ extern int	ip6_use_tempaddr; /* whether to use temporary addresses. */
 extern int	ip6_prefer_tempaddr; /* whether to prefer temporary addresses
 					in the source address selection */
 
+extern int	ip6_use_defzone; /* whether to use the default scope zone
+				    when unspecified */
+
 extern	struct pfil_head inet6_pfil_hook;	/* packet filter hooks */
 
 extern struct	pr_usrreqs rip6_usrreqs;
@@ -391,7 +394,7 @@ int	none_input __P((struct mbuf **, int *, int));
 
 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
 	struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
-	struct in6_addr *, int *));
+	struct in6_addr *, struct ifnet **, int *));
 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
 	struct ip6_moptions *, struct route_in6 *, struct ifnet **,
 	struct rtentry **, int));