This patch adds the 6LoWPAN Context Option (6CO) as userspace option to
processing such options inside RA messages in userspace.

Cc: David S. Miller <[email protected]>
Cc: Alexey Kuznetsov <[email protected]>
Cc: James Morris <[email protected]>
Cc: Hideaki YOSHIFUJI <[email protected]>
Cc: Patrick McHardy <[email protected]>
Signed-off-by: Alexander Aring <[email protected]>
---
 include/net/ndisc.h | 1 +
 net/ipv6/ndisc.c    | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 2d8edaa..944258d 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -35,6 +35,7 @@ enum {
        ND_OPT_ROUTE_INFO = 24,         /* RFC4191 */
        ND_OPT_RDNSS = 25,              /* RFC5006 */
        ND_OPT_DNSSL = 31,              /* RFC6106 */
+       ND_OPT_6CO = 34,                /* RFC6775 */
        __ND_OPT_MAX
 };
 
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index d6161e1..bed154e 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -188,7 +188,8 @@ static struct nd_opt_hdr *ndisc_next_option(struct 
nd_opt_hdr *cur,
 static inline int ndisc_is_useropt(struct nd_opt_hdr *opt)
 {
        return opt->nd_opt_type == ND_OPT_RDNSS ||
-               opt->nd_opt_type == ND_OPT_DNSSL;
+               opt->nd_opt_type == ND_OPT_DNSSL ||
+               opt->nd_opt_type == ND_OPT_6CO;
 }
 
 static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur,
-- 
2.6.1

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