mac80211: fix the RANN propagation issues

This patch is intended to solve the follwing issues in RANN propagation:
[1] The interval in propagated RANN should be based on the interval of received RANN.
[2] The aggregated path metric for propagated RANN is as received plus own link metric
    towards the transmitting mesh STA (not root mesh STA).
[3] The comparison of path metric for RANN with same sequence number should be done
    before deciding whether to propagate or not.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 2bd5d8b864f6..3e52439ed112 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -86,6 +86,7 @@ enum mesh_deferred_task_flags {
  * mpath itself.  No need to take this lock when adding or removing
  * an mpath to a hash bucket on a path table.
  * @rann_snd_addr: the RANN sender address
+ * @rann_metric: the aggregated path metric towards the root node
  * @is_root: the destination station of this path is a root node
  * @is_gate: the destination station of this path is a mesh gate
  *
@@ -112,6 +113,7 @@ struct mesh_path {
         enum mesh_path_flags flags;
         spinlock_t state_lock;
         u8 rann_snd_addr[ETH_ALEN];
+        u32 rann_metric;
         bool is_root;
         bool is_gate;
 };