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From: Qing Li <qingli@FreeBSD.org>
Date: Sat, 5 Sep 2009 17:35:31 +0000 (UTC)
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Subject: svn commit: r196868 - in stable/8/sys: . amd64/include/xen
	cddl/contrib/opensolaris contrib/dev/acpica contrib/pf
	dev/xen/xenpci netinet6
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Author: qingli
Date: Sat Sep  5 17:35:31 2009
New Revision: 196868
URL: http://svn.freebsd.org/changeset/base/196868

Log:
  MFC	r196865
  
  This patch fixes an address scope violation. Considering the
  scenario where an anycast address is assigned on one interface,
  and a global address with the same scope is assigned on another
  interface. In other words, the interface owns the anycast
  address has only the link-local address as one other address.
  Without this patch, "ping6" the anycast address from another
  station will observe the source address of the returned ICMP6
  echo reply has the link-local address, not the global address
  that exists on the other interface in the same node.
  
  Reviewed by:    bz
  Approved by:	re

Modified:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)
  stable/8/sys/netinet6/icmp6.c

Modified: stable/8/sys/netinet6/icmp6.c
==============================================================================
--- stable/8/sys/netinet6/icmp6.c	Sat Sep  5 17:29:08 2009	(r196867)
+++ stable/8/sys/netinet6/icmp6.c	Sat Sep  5 17:35:31 2009	(r196868)
@@ -2170,6 +2170,10 @@ icmp6_reflect(struct mbuf *m, size_t off
 		}
 	}
 
+	if ((srcp != NULL) && 
+	    (in6_addrscope(srcp) != in6_addrscope(&ip6->ip6_src)))
+		srcp = NULL;
+
 	if (srcp == NULL) {
 		int e;
 		struct sockaddr_in6 sin6;