Author: bms
Date: Sat Apr 10 12:24:21 2010
New Revision: 206454
URL: http://svn.freebsd.org/changeset/base/206454

Log:
  When embedding the scope ID in MLDv1 output, check if the scope of the address
  being embedded is in fact link-local, before attempting to embed it.
  
  Note that this operation is a side-effect of trying to avoid recursion on
  the IN6 scope lock.
  
  PR:           144560
  Submitted by: Petr Lampa
  MFC after:    3 days

Modified:
  head/sys/netinet6/mld6.c

Modified: head/sys/netinet6/mld6.c
==============================================================================
--- head/sys/netinet6/mld6.c    Sat Apr 10 12:10:11 2010        (r206453)
+++ head/sys/netinet6/mld6.c    Sat Apr 10 12:24:21 2010        (r206454)
@@ -195,8 +195,10 @@ static int sysctl_mld_ifinfo(SYSCTL_HAND
 static struct mtx               mld_mtx;
 MALLOC_DEFINE(M_MLD, "mld", "mld state");
 
-#define        MLD_EMBEDSCOPE(pin6, zoneid) \
-       (pin6)->s6_addr16[1] = htons((zoneid) & 0xFFFF)
+#define        MLD_EMBEDSCOPE(pin6, zoneid)                                    
\
+       if (IN6_IS_SCOPE_LINKLOCAL(pin6) ||                             \
+           IN6_IS_ADDR_MC_INTFACELOCAL(pin6))                          \
+               (pin6)->s6_addr16[1] = htons((zoneid) & 0xFFFF)         \
 
 /*
  * VIMAGE-wide globals.
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