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Commit 59b699cd authored by Antonio Quartulli's avatar Antonio Quartulli Committed by Marek Lindner
Browse files

batman-adv: implement AP-isolation on the receiver side 



When a node receives a unicast packet it checks if the source and the
destination client can communicate or not due to the AP isolation

Signed-off-by: default avatarAntonio Quartulli <ordex@autistici.org>
Signed-off-by: default avatarMarek Lindner <lindner_marek@yahoo.de>
parent bc279080

Documentation/ABI/testing/sysfs-class-net-mesh

+8 −0
Original line number Diff line number Diff line
@@ -22,6 +22,14 @@ Description: 
                mesh will be fragmented or silently discarded if the

                packet size exceeds the outgoing interface MTU.



What:		/sys/class/net/<mesh_iface>/mesh/ap_isolation

Date:		May 2011

Contact:	Antonio Quartulli <ordex@autistici.org>

Description:

		Indicates whether the data traffic going from a

		wireless client to another wireless client will be

		silently dropped.



What:           /sys/class/net/<mesh_iface>/mesh/gw_bandwidth

Date:           October 2010

Contact:        Marek Lindner <lindner_marek@yahoo.de>

net/batman-adv/bat_sysfs.c

+2 −0
Original line number Diff line number Diff line
@@ -380,6 +380,7 @@ static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr, 
BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);

BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);

BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);

BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);

static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);

static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);

BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
@@ -396,6 +397,7 @@ static struct bat_attribute *mesh_attrs[] = { 
	&bat_attr_aggregated_ogms,

	&bat_attr_bonding,

	&bat_attr_fragmentation,

	&bat_attr_ap_isolation,

	&bat_attr_vis_mode,

	&bat_attr_gw_mode,

	&bat_attr_orig_interval,

net/batman-adv/soft-interface.c

+4 −0
Original line number Diff line number Diff line
@@ -739,6 +739,9 @@ void interface_rx(struct net_device *soft_iface, 


	soft_iface->last_rx = jiffies;



	if (is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))

		goto dropped;



	netif_rx(skb);

	goto out;
@@ -812,6 +815,7 @@ struct net_device *softif_create(const char *name) 


	atomic_set(&bat_priv->aggregated_ogms, 1);

	atomic_set(&bat_priv->bonding, 0);

	atomic_set(&bat_priv->ap_isolation, 0);

	atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);

	atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);

	atomic_set(&bat_priv->gw_sel_class, 20);

net/batman-adv/translation-table.c

+42 −0
Original line number Diff line number Diff line
@@ -781,6 +781,18 @@ static void tt_global_table_free(struct bat_priv *bat_priv) 
	bat_priv->tt_global_hash = NULL;

}



static bool _is_ap_isolated(struct tt_local_entry *tt_local_entry,

			    struct tt_global_entry *tt_global_entry)

{

	bool ret = false;



	if (tt_local_entry->flags & TT_CLIENT_WIFI &&

	    tt_global_entry->flags & TT_CLIENT_WIFI)

		ret = true;



	return ret;

}



struct orig_node *transtable_search(struct bat_priv *bat_priv,

				    const uint8_t *addr)

{
@@ -1729,3 +1741,33 @@ void tt_commit_changes(struct bat_priv *bat_priv) 
	atomic_inc(&bat_priv->ttvn);

	bat_priv->tt_poss_change = false;

}



bool is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, uint8_t *dst)

{

	struct tt_local_entry *tt_local_entry = NULL;

	struct tt_global_entry *tt_global_entry = NULL;

	bool ret = true;



	if (!atomic_read(&bat_priv->ap_isolation))

		return false;



	tt_local_entry = tt_local_hash_find(bat_priv, dst);

	if (!tt_local_entry)

		goto out;



	tt_global_entry = tt_global_hash_find(bat_priv, src);

	if (!tt_global_entry)

		goto out;



	if (_is_ap_isolated(tt_local_entry, tt_global_entry))

		goto out;



	ret = false;



out:

	if (tt_global_entry)

		tt_global_entry_free_ref(tt_global_entry);

	if (tt_local_entry)

		tt_local_entry_free_ref(tt_local_entry);

	return ret;

}

net/batman-adv/translation-table.h

+1 −0
Original line number Diff line number Diff line
@@ -63,5 +63,6 @@ void handle_tt_response(struct bat_priv *bat_priv, 
void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,

		   struct orig_node *orig_node);

void tt_commit_changes(struct bat_priv *bat_priv);

bool is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, uint8_t *dst);



#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */