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Date: Wed, 24 Aug 2011 15:00:34 +0200
From: Marek Lindner <lindner_marek@...oo.de>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
Antonio Quartulli <ordex@...istici.org>,
Marek Lindner <lindner_marek@...oo.de>
Subject: [PATCH 4/8] batman-adv: implement AP-isolation on the receiver side
From: Antonio Quartulli <ordex@...istici.org>
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@...istici.org>
Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
---
Documentation/ABI/testing/sysfs-class-net-mesh | 8 ++++
net/batman-adv/bat_sysfs.c | 2 +
net/batman-adv/soft-interface.c | 4 ++
net/batman-adv/translation-table.c | 42 ++++++++++++++++++++++++
net/batman-adv/translation-table.h | 1 +
net/batman-adv/types.h | 1 +
6 files changed, 58 insertions(+), 0 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh
index 748fe17..b020014 100644
--- a/Documentation/ABI/testing/sysfs-class-net-mesh
+++ b/Documentation/ABI/testing/sysfs-class-net-mesh
@@ -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@...istici.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@...oo.de>
diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index cd15deb..b8a7414 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -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,
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 6deed44..9addbab 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -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);
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index d630564..d0ed931 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -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;
+}
diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
index 4d1ca35..f1d148e 100644
--- a/net/batman-adv/translation-table.h
+++ b/net/batman-adv/translation-table.h
@@ -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_ */
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index bd0ced8..1ae3557 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -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 */
--
1.7.5.3
--
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