[PATCHv2 net-next] 6lowpan: handle only real link-local addresses

[Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

A link-local address isn't fe80::/10 it's fe80::/64
see http://tools.ietf.org/html/rfc4291#section-2.5.6
for more details.

Also fix a comment issue "local link" -> "link-local"

Signed-off-by: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Reviewed-by: Werner Almesberger <werner-SEdMjqphH88wryQfseakQg@public.gmane.org>
---
v2:
 - Add "net-next" tag

 net/ieee802154/6lowpan.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/ieee802154/6lowpan.h b/net/ieee802154/6lowpan.h
index 4b8f917..61f0ce9 100644
--- a/net/ieee802154/6lowpan.h
+++ b/net/ieee802154/6lowpan.h
@@ -83,8 +83,11 @@
 #define ipaddr_prefixcmp(addr1, addr2, length) \
 	(memcmp(addr1, addr2, length >> 3) == 0)
 
-/* local link, i.e. FE80::/10 */
-#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
+/* link-local, i.e. FE80::/64 */
+#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80) &&	\
+		(((a)->s6_addr16[1]) == 0) &&	\
+		(((a)->s6_addr16[2]) == 0) &&	\
+		(((a)->s6_addr16[3]) == 0))
 
 /*
  * check whether we can compress the IID to 16 bits,
-- 
1.8.3.3


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