nicira-ext: Support matching IPv6 Neighbor Discovery messages.

IPv6 uses Neighbor Discovery messages in a similar manner to how IPv4
uses ARP.  This commit adds support for matching deeper into the
payloads of Neighbor Solicitation (NS) and Neighbor Advertisement (NA)
messages.  Currently, the matching fields include:

    - NS and NA Target (nd_target)
    - NS Source Link Layer Address (nd_sll)
    - NA Target Link Layer Address (nd_tll)

When defining IPv6 Neighbor Discovery rules, the Nicira Extensible Match
(NXM) extension to OVS must be used.

Signed-off-by: Justin Pettit <jpettit@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/odp-util.h b/lib/odp-util.h
index 8ec09f3c..074df87f 100644
--- a/lib/odp-util.h
+++ b/lib/odp-util.h
@@ -64,13 +64,13 @@ void format_odp_actions(struct ds *, const struct nlattr *odp_actions,
                         size_t actions_len);
 
 /* By my calculations currently the longest valid nlattr-formatted flow key is
- * 92 bytes long, so this leaves some safety margin.
+ * 124 bytes long, so this leaves some safety margin.
  *
  * We allocate temporary on-stack buffers for flow keys as arrays of uint32_t
  * to ensure proper 32-bit alignment for Netlink attributes.  (An array of
  * "struct nlattr" might not, in theory, be sufficiently aligned because it
  * only contains 16-bit types.) */
-#define ODPUTIL_FLOW_KEY_BYTES 112
+#define ODPUTIL_FLOW_KEY_BYTES 144
 #define ODPUTIL_FLOW_KEY_U32S DIV_ROUND_UP(ODPUTIL_FLOW_KEY_BYTES, 4)
 
 void odp_flow_key_format(const struct nlattr *, size_t, struct ds *);