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authorMartin Hundebøll <martin@hundeboll.net>2013-01-25 10:12:39 (GMT)
committerAntonio Quartulli <ordex@autistici.org>2013-03-13 21:53:49 (GMT)
commitd56b1705e28c196312607bc8bdde0e91879c20b6 (patch)
tree3f48f0c97be0db6927edc1dec0d414a28557e06b /net/batman-adv/main.h
parentd353d8d4d9f0184ac43a90c6e04b593c33bd28ea (diff)
batman-adv: network coding - detect coding nodes and remove these after timeout
To use network coding efficiently, a relay must know when neighbor nodes are likely to have enough information to be able to decode a network coded packet. This is detected by using OGMs from batman-adv to discover when one neighbor is in range of another neighbor. The relay check the TLL to detect when an OGM is forwarded from one neighbor by another neighbor, and thereby knows that the two neighbors are in range and thus overhear packets sent by each other. This information is saved in the orig_node struct to be used when searching for coding opportunities. Two lists are added to the orig_node struct: One for neighbors that can hear the orig_node (outgoing nc_nodes) and one for neighbors that the orig_node can hear (incoming nc_nodes). Information about nc_nodes is kept for 10 seconds and is available through debugfs in batman_adv/nc_nodes to use when debugging network coding. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv/main.h')
-rw-r--r--net/batman-adv/main.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 59ba2ff..8a10619 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -105,6 +105,8 @@
#define BATADV_RESET_PROTECTION_MS 30000
#define BATADV_EXPECTED_SEQNO_RANGE 65536
+#define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */
+
enum batadv_mesh_state {
BATADV_MESH_INACTIVE,
BATADV_MESH_ACTIVE,

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