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: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Antonio Quartulli 2011-07-07 15:35:36 +02:00 committed by Marek Lindner
parent bc2790808a
commit 59b699cdee
6 changed files with 58 additions and 0 deletions

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@ -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>

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@ -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,

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@ -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);

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@ -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;
}

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@ -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_ */

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@ -146,6 +146,7 @@ struct bat_priv {
atomic_t aggregated_ogms; /* boolean */
atomic_t bonding; /* boolean */
atomic_t fragmentation; /* boolean */
atomic_t ap_isolation; /* boolean */
atomic_t vis_mode; /* VIS_TYPE_* */
atomic_t gw_mode; /* GW_MODE_* */
atomic_t gw_sel_class; /* uint */