batman-adv: tvlv - add distributed arp table container
Create DAT container to announce DAT capabilities (if enabled).
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 06345d4..f07ec32 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -419,6 +419,10 @@
bool ret = false;
int j;
+ /* check if orig node candidate is running DAT */
+ if (!(candidate->capabilities & BATADV_ORIG_CAPA_HAS_DAT))
+ goto out;
+
/* Check if this node has already been selected... */
for (j = 0; j < select; j++)
if (res[j].orig_node == candidate)
@@ -626,6 +630,59 @@
}
/**
+ * batadv_dat_tvlv_container_update - update the dat tvlv container after dat
+ * setting change
+ * @bat_priv: the bat priv with all the soft interface information
+ */
+static void batadv_dat_tvlv_container_update(struct batadv_priv *bat_priv)
+{
+ char dat_mode;
+
+ dat_mode = atomic_read(&bat_priv->distributed_arp_table);
+
+ switch (dat_mode) {
+ case 0:
+ batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1);
+ break;
+ case 1:
+ batadv_tvlv_container_register(bat_priv, BATADV_TVLV_DAT, 1,
+ NULL, 0);
+ break;
+ }
+}
+
+/**
+ * batadv_dat_status_update - update the dat tvlv container after dat
+ * setting change
+ * @net_dev: the soft interface net device
+ */
+void batadv_dat_status_update(struct net_device *net_dev)
+{
+ struct batadv_priv *bat_priv = netdev_priv(net_dev);
+ batadv_dat_tvlv_container_update(bat_priv);
+}
+
+/**
+ * batadv_gw_tvlv_ogm_handler_v1 - process incoming dat tvlv container
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig: the orig_node of the ogm
+ * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
+ * @tvlv_value: tvlv buffer containing the gateway data
+ * @tvlv_value_len: tvlv buffer length
+ */
+static void batadv_dat_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig,
+ uint8_t flags,
+ void *tvlv_value,
+ uint16_t tvlv_value_len)
+{
+ if (flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND)
+ orig->capabilities &= ~BATADV_ORIG_CAPA_HAS_DAT;
+ else
+ orig->capabilities |= BATADV_ORIG_CAPA_HAS_DAT;
+}
+
+/**
* batadv_dat_hash_free - free the local DAT hash table
* @bat_priv: the bat priv with all the soft interface information
*/
@@ -657,6 +714,10 @@
batadv_dat_start_timer(bat_priv);
+ batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1,
+ NULL, BATADV_TVLV_DAT, 1,
+ BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
+ batadv_dat_tvlv_container_update(bat_priv);
return 0;
}
@@ -666,6 +727,9 @@
*/
void batadv_dat_free(struct batadv_priv *bat_priv)
{
+ batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1);
+ batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_DAT, 1);
+
cancel_delayed_work_sync(&bat_priv->dat.work);
batadv_dat_hash_free(bat_priv);