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authorAntonio Quartulli <ordex@autistici.org>2011-04-27 14:27:57 +0200
committerSven Eckelmann <sven@narfation.org>2011-06-20 11:37:27 +0200
commitcc47f66e6b9ec7e7d465f74739a6fc9844593894 (patch)
tree8fbda7f59267bca45f9e887d09ba1de2f3c62f8d /net/batman-adv/main.c
parenta73105b8d4c765d9ebfb664d0a66802127d8e4c7 (diff)
batman-adv: improved roaming mechanism
With the current client announcement implementation, in case of roaming, an update is triggered on the new AP serving the client. At that point the new information is spread around by means of the OGM broadcasting mechanism. Until this operations is not executed, no node is able to correctly route traffic towards the client. This obviously causes packet drops and introduces a delay in the time needed by the client to recover its connections. A new packet type called ROAMING_ADVERTISEMENT is added to account this issue. This message is sent in case of roaming from the new AP serving the client to the old one and will contain the client MAC address. In this way an out-of-OGM update is immediately committed, so that the old node can update its global translation table. Traffic reaching this node will then be redirected to the correct destination utilising the fresher information. Thus reducing the packet drops and the connection recovery delay. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'net/batman-adv/main.c')
-rw-r--r--net/batman-adv/main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 49a5e64b2d4f..3318ee27fe23 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -88,6 +88,7 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->tt_ghash_lock);
spin_lock_init(&bat_priv->tt_changes_list_lock);
spin_lock_init(&bat_priv->tt_req_list_lock);
+ spin_lock_init(&bat_priv->tt_roam_list_lock);
spin_lock_init(&bat_priv->tt_buff_lock);
spin_lock_init(&bat_priv->gw_list_lock);
spin_lock_init(&bat_priv->vis_hash_lock);
@@ -101,6 +102,7 @@ int mesh_init(struct net_device *soft_iface)
INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
INIT_LIST_HEAD(&bat_priv->tt_changes_list);
INIT_LIST_HEAD(&bat_priv->tt_req_list);
+ INIT_LIST_HEAD(&bat_priv->tt_roam_list);
if (originator_init(bat_priv) < 1)
goto err;