batman-adv: add bat_neigh_is_equiv_or_better API function
Each routing protocol has its own metric semantic and
therefore is the protocol itself the only component able to
compare two metrics to check their "similarity".
This new API allows each routing protocol to implement its
own logic and make the external code protocol agnostic.
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index d7dfafe..773301a 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -86,6 +86,12 @@
/* numbers of originator to contact for any PUT/GET DHT operation */
#define BATADV_DAT_CANDIDATES_NUM 3
+/**
+ * BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ
+ * at most from the primary one in order to be still considered acceptable
+ */
+#define BATADV_TQ_SIMILARITY_THRESHOLD 50
+
/* how much worse secondary interfaces may be to be considered as bonding
* candidates
*/