Fix is_same_net6 - bugged if prefix length not divisible by 8.

CHANGELOG

@@ -8,6 +8,10 @@ version 2.62
 	    advertisements with some configurations. Thanks to
 	    Vladislav Grishenko for the patch.
 
+	    Fixed bug which broke DHCPv6/RA with prefix lengths 
+	    which are not divisible by 8. Thanks to Andre Coetzee 
+	    for spotting this.
+
 
 version 2.61
 	    Re-write interface discovery code on *BSD to use

src/util.c

@@ -330,7 +330,7 @@ int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen)
     return 0;
 
   if (pfbits == 0 ||
-      (a->s6_addr[pfbytes] >> (8 - pfbits) != b->s6_addr[pfbytes] >> (8 - pfbits)))
+      (a->s6_addr[pfbytes] >> (8 - pfbits) == b->s6_addr[pfbytes] >> (8 - pfbits)))
     return 1;
 
   return 0;