svn commit: r196865 - head/sys/netinet6
Qing Li
qingli at FreeBSD.org
Sat Sep 5 16:50:56 UTC 2009
Author: qingli
Date: Sat Sep 5 16:50:55 2009
New Revision: 196865
URL: http://svn.freebsd.org/changeset/base/196865
Log:
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
MFC after: immediately
Modified:
head/sys/netinet6/icmp6.c
Modified: head/sys/netinet6/icmp6.c
==============================================================================
--- head/sys/netinet6/icmp6.c Sat Sep 5 16:43:16 2009 (r196864)
+++ head/sys/netinet6/icmp6.c Sat Sep 5 16:50:55 2009 (r196865)
@@ -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;
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