Merge branch 'batman-adv/next' of git://git.open-mesh.org/linux-merge

21 files changed, 291 insertions, 148 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh
index 748fe1701d25..b02001488eef 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@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>
diff --git a/net/batman-adv/aggregation.h b/net/batman-adv/aggregation.h
index 216337bb841f..df4a5a943088 100644
--- a/net/batman-adv/aggregation.h
+++ b/net/batman-adv/aggregation.h
@@ -28,8 +28,7 @@
 static inline int aggregated_packet(int buff_pos, int packet_len,
                                     int tt_num_changes)
 {
-        int next_buff_pos = buff_pos + BAT_PACKET_LEN + (tt_num_changes *
-                                                sizeof(struct tt_change));
+        int next_buff_pos = buff_pos + BAT_PACKET_LEN + tt_len(tt_num_changes);
 
         return (next_buff_pos <= packet_len) &&
                 (next_buff_pos <= MAX_AGGREGATION_BYTES);
diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index cd15deba60a1..b8a7414c3571 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/bitarray.c b/net/batman-adv/bitarray.c
index c1f4bfc09cc3..0be9ff346fa0 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -97,12 +97,12 @@ static void bit_shift(unsigned long *seq_bits, int32_t n)
                         (seq_bits[i - word_num - 1] >>
                          (WORD_BIT_SIZE-word_offset));
                 /* and the upper part of the right half and shift it left to
-                 * it's position */
+                 * its position */
                 /* for our example that would be: word[0] = 9800 + 0076 =
                  * 9876 */
         }
-        /* now for our last word, i==word_num, we only have the it's "left"
-         * half. that's the 1000 word in our example.*/
+        /* now for our last word, i==word_num, we only have its "left" half.
+         * that's the 1000 word in our example.*/
 
         seq_bits[i] = (seq_bits[i - word_num] << word_offset);
 
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 056180ef9e1a..619fb73b3b76 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -532,14 +532,14 @@ static bool is_type_dhcprequest(struct sk_buff *skb, int header_len)
         pkt_len -= header_len + DHCP_OPTIONS_OFFSET + 1;
 
         /* Access the dhcp option lists. Each entry is made up by:
-         * - octect 1: option type
-         * - octect 2: option data len (only if type != 255 and 0)
-         * - octect 3: option data */
+         * - octet 1: option type
+         * - octet 2: option data len (only if type != 255 and 0)
+         * - octet 3: option data */
         while (*p != 255 && !ret) {
-                /* p now points to the first octect: option type */
+                /* p now points to the first octet: option type */
                 if (*p == 53) {
                         /* type 53 is the message type option.
-                         * Jump the len octect and go to the data octect */
+                         * Jump the len octet and go to the data octet */
                         if (pkt_len < 2)
                                 goto out;
                         p += 2;
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index db7aacf1e095..bf91e4d8a47f 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -249,7 +249,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
 
         /**
          * the first active interface becomes our primary interface or
-         * the next active interface after the old primay interface was removed
+         * the next active interface after the old primary interface was removed
          */
         primary_if = primary_if_get_selected(bat_priv);
         if (!primary_if)
@@ -573,7 +573,7 @@ out:
         return NOTIFY_DONE;
 }
 
-/* receive a packet with the batman ethertype coming on a hard
+/* incoming packets with the batman ethertype received on any active hard
  * interface */
 static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
                            struct packet_type *ptype,
@@ -681,6 +681,36 @@ err_out:
         return NET_RX_DROP;
 }
 
+/* This function returns true if the interface represented by ifindex is a
+ * 802.11 wireless device */
+bool is_wifi_iface(int ifindex)
+{
+        struct net_device *net_device = NULL;
+        bool ret = false;
+
+        if (ifindex == NULL_IFINDEX)
+                goto out;
+
+        net_device = dev_get_by_index(&init_net, ifindex);
+        if (!net_device)
+                goto out;
+
+#ifdef CONFIG_WIRELESS_EXT
+        /* pre-cfg80211 drivers have to implement WEXT, so it is possible to
+         * check for wireless_handlers != NULL */
+        if (net_device->wireless_handlers)
+                ret = true;
+        else
+#endif
+                /* cfg80211 drivers have to set ieee80211_ptr */
+                if (net_device->ieee80211_ptr)
+                        ret = true;
+out:
+        if (net_device)
+                dev_put(net_device);
+        return ret;
+}
+
 struct notifier_block hard_if_notifier = {
         .notifier_call = hard_if_event,
 };
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
index 442eacbc9e3a..67f78d1a63b4 100644
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -42,6 +42,7 @@ void hardif_remove_interfaces(void);
 int hardif_min_mtu(struct net_device *soft_iface);
 void update_min_mtu(struct net_device *soft_iface);
 void hardif_free_rcu(struct rcu_head *rcu);
+bool is_wifi_iface(int ifindex);
 
 static inline void hardif_free_ref(struct hard_iface *hard_iface)
 {
diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h
index dd5c9fd7a905..d20aa71ba1e8 100644
--- a/net/batman-adv/hash.h
+++ b/net/batman-adv/hash.h
@@ -76,19 +76,30 @@ static inline void hash_delete(struct hashtable_t *hash,
         hash_destroy(hash);
 }
 
-/* adds data to the hashtable. returns 0 on success, -1 on error */
+/**
+ *      hash_add - adds data to the hashtable
+ *      @hash: storage hash table
+ *      @compare: callback to determine if 2 hash elements are identical
+ *      @choose: callback calculating the hash index
+ *      @data: data passed to the aforementioned callbacks as argument
+ *      @data_node: to be added element
+ *
+ *      Returns 0 on success, 1 if the element already is in the hash
+ *      and -1 on error.
+ */
+
 static inline int hash_add(struct hashtable_t *hash,
                            hashdata_compare_cb compare,
                            hashdata_choose_cb choose,
                            const void *data, struct hlist_node *data_node)
 {
-        int index;
+        int index, ret = -1;
         struct hlist_head *head;
         struct hlist_node *node;
         spinlock_t *list_lock; /* spinlock to protect write access */
 
         if (!hash)
-                goto err;
+                goto out;
 
         index = choose(data, hash->size);
         head = &hash->table[index];
@@ -99,6 +110,7 @@ static inline int hash_add(struct hashtable_t *hash,
                 if (!compare(node, data))
                         continue;
 
+                ret = 1;
                 goto err_unlock;
         }
         rcu_read_unlock();
@@ -108,12 +120,13 @@ static inline int hash_add(struct hashtable_t *hash,
         hlist_add_head_rcu(data_node, head);
         spin_unlock_bh(list_lock);
 
-        return 0;
+        ret = 0;
+        goto out;
 
 err_unlock:
         rcu_read_unlock();
-err:
-        return -1;
+out:
+        return ret;
 }
 
 /* removes data from hash, if found. returns pointer do data on success, so you
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index b0f9068ade57..79b9ae522ce9 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -107,7 +107,7 @@ int mesh_init(struct net_device *soft_iface)
         if (tt_init(bat_priv) < 1)
                 goto err;
 
-        tt_local_add(soft_iface, soft_iface->dev_addr);
+        tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);
 
         if (vis_init(bat_priv) < 1)
                 goto err;
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index a6df61a6933b..60b369635b4d 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -44,7 +44,7 @@
 #define PURGE_TIMEOUT 200
 #define TT_LOCAL_TIMEOUT 3600 /* in seconds */
 #define TT_CLIENT_ROAM_TIMEOUT 600
-/* sliding packet range of received originator messages in squence numbers
+/* sliding packet range of received originator messages in sequence numbers
  * (should be a multiple of our word size) */
 #define TQ_LOCAL_WINDOW_SIZE 64
 #define TT_REQUEST_TIMEOUT 3 /* seconds we have to keep pending tt_req */
@@ -62,6 +62,8 @@
 
 #define NO_FLAGS 0
 
+#define NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */
+
 #define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
 
 #define LOG_BUF_LEN 8192          /* has to be a power of 2 */
@@ -133,7 +135,7 @@ enum dbg_level {
 #include <linux/mutex.h>        /* mutex */
 #include <linux/module.h>       /* needed by all modules */
 #include <linux/netdevice.h>    /* netdevice */
-#include <linux/etherdevice.h>  /* ethernet address classifaction */
+#include <linux/etherdevice.h>  /* ethernet address classification */
 #include <linux/if_ether.h>     /* ethernet header */
 #include <linux/poll.h>         /* poll_table */
 #include <linux/kthread.h>      /* kernel threads */
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index f3c3f620d195..d448018e514f 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -252,7 +252,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
 
         hash_added = hash_add(bat_priv->orig_hash, compare_orig,
                               choose_orig, orig_node, &orig_node->hash_entry);
-        if (hash_added < 0)
+        if (hash_added != 0)
                 goto free_bcast_own_sum;
 
         return orig_node;
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index b76b4be10b92..8802eab2a46d 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -84,6 +84,7 @@ enum tt_query_flags {
 enum tt_client_flags {
         TT_CLIENT_DEL     = 1 << 0,
         TT_CLIENT_ROAM    = 1 << 1,
+        TT_CLIENT_WIFI    = 1 << 2,
         TT_CLIENT_NOPURGE = 1 << 8,
         TT_CLIENT_NEW     = 1 << 9,
         TT_CLIENT_PENDING = 1 << 10
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 0f32c818874d..19499281b695 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -64,66 +64,6 @@ void slide_own_bcast_window(struct hard_iface *hard_iface)
         }
 }
 
-static void update_transtable(struct bat_priv *bat_priv,
-                              struct orig_node *orig_node,
-                              const unsigned char *tt_buff,
-                              uint8_t tt_num_changes, uint8_t ttvn,
-                              uint16_t tt_crc)
-{
-        uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
-        bool full_table = true;
-
-        /* the ttvn increased by one -> we can apply the attached changes */
-        if (ttvn - orig_ttvn == 1) {
-                /* the OGM could not contain the changes because they were too
-                 * many to fit in one frame or because they have already been
-                 * sent TT_OGM_APPEND_MAX times. In this case send a tt
-                 * request */
-                if (!tt_num_changes) {
-                        full_table = false;
-                        goto request_table;
-                }
-
-                tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
-                                  (struct tt_change *)tt_buff);
-
-                /* Even if we received the crc into the OGM, we prefer
-                 * to recompute it to spot any possible inconsistency
-                 * in the global table */
-                orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
-
-                /* The ttvn alone is not enough to guarantee consistency
-                 * because a single value could repesent different states
-                 * (due to the wrap around). Thus a node has to check whether
-                 * the resulting table (after applying the changes) is still
-                 * consistent or not. E.g. a node could disconnect while its
-                 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
-                 * checking the CRC value is mandatory to detect the
-                 * inconsistency */
-                if (orig_node->tt_crc != tt_crc)
-                        goto request_table;
-
-                /* Roaming phase is over: tables are in sync again. I can
-                 * unset the flag */
-                orig_node->tt_poss_change = false;
-        } else {
-                /* if we missed more than one change or our tables are not
-                 * in sync anymore -> request fresh tt data */
-                if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
-request_table:
-                        bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
-                                "Need to retrieve the correct information "
-                                "(ttvn: %u last_ttvn: %u crc: %u last_crc: "
-                                "%u num_changes: %u)\n", orig_node->orig, ttvn,
-                                orig_ttvn, tt_crc, orig_node->tt_crc,
-                                tt_num_changes);
-                        send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
-                                        full_table);
-                        return;
-                }
-        }
-}
-
 static void update_route(struct bat_priv *bat_priv,
                          struct orig_node *orig_node,
                          struct neigh_node *neigh_node)
@@ -228,7 +168,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
         if (!neigh_node)
                 goto out;
 
-        /* if orig_node is direct neighbour update neigh_node last_valid */
+        /* if orig_node is direct neighbor update neigh_node last_valid */
         if (orig_node == orig_neigh_node)
                 neigh_node->last_valid = jiffies;
 
@@ -473,7 +413,7 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
         if (router && (router->tq_avg > neigh_node->tq_avg))
                 goto update_tt;
 
-        /* if the TQ is the same and the link not more symetric we
+        /* if the TQ is the same and the link not more symmetric we
          * won't consider it either */
         if (router && (neigh_node->tq_avg == router->tq_avg)) {
                 orig_node_tmp = router->orig_node;
@@ -500,10 +440,9 @@ update_tt:
         if (((batman_packet->orig != ethhdr->h_source) &&
                                 (batman_packet->ttl > 2)) ||
                                 (batman_packet->flags & PRIMARIES_FIRST_HOP))
-                update_transtable(bat_priv, orig_node, tt_buff,
-                                  batman_packet->tt_num_changes,
-                                  batman_packet->ttvn,
-                                  batman_packet->tt_crc);
+                tt_update_orig(bat_priv, orig_node, tt_buff,
+                               batman_packet->tt_num_changes,
+                               batman_packet->ttvn, batman_packet->tt_crc);
 
         if (orig_node->gw_flags != batman_packet->gw_flags)
                 gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
@@ -1243,7 +1182,7 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
                 }
                 break;
         case TT_RESPONSE:
-                /* packet needs to be linearised to access the TT changes */
+                /* packet needs to be linearized to access the TT changes */
                 if (skb_linearize(skb) < 0)
                         goto out;
 
@@ -1300,7 +1239,7 @@ int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if)
                 roam_adv_packet->client);
 
         tt_global_add(bat_priv, orig_node, roam_adv_packet->client,
-                      atomic_read(&orig_node->last_ttvn) + 1, true);
+                      atomic_read(&orig_node->last_ttvn) + 1, true, false);
 
         /* Roaming phase starts: I have new information but the ttvn has not
          * been incremented yet. This flag will make me check all the incoming
@@ -1536,7 +1475,7 @@ static int check_unicast_ttvn(struct bat_priv *bat_priv,
 
                 ethhdr = (struct ethhdr *)(skb->data +
                         sizeof(struct unicast_packet));
-                orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+                orig_node = transtable_search(bat_priv, NULL, ethhdr->h_dest);
 
                 if (!orig_node) {
                         if (!is_my_client(bat_priv, ethhdr->h_dest))
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 58d14472068c..57ae80936911 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -135,7 +135,7 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
                                                             "Forwarding"));
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
-                        " IDF %s, hvn %d) on interface %s [%pM]\n",
+                        " IDF %s, ttvn %d) on interface %s [%pM]\n",
                         fwd_str, (packet_num > 0 ? "aggregated " : ""),
                         batman_packet->orig, ntohl(batman_packet->seqno),
                         batman_packet->tq, batman_packet->ttl,
@@ -313,7 +313,7 @@ void schedule_own_packet(struct hard_iface *hard_iface)
                         prepare_packet_buffer(bat_priv, hard_iface);
                 }
 
-                /* if the changes have been sent enough times */
+                /* if the changes have been sent often enough */
                 if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))
                         reset_packet_buffer(bat_priv, hard_iface);
         }
@@ -454,7 +454,7 @@ static void _add_bcast_packet_to_list(struct bat_priv *bat_priv,
 }
 
 /* add a broadcast packet to the queue and setup timers. broadcast packets
- * are sent multiple times to increase probability for beeing received.
+ * are sent multiple times to increase probability for being received.
  *
  * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on
  * errors.
@@ -612,7 +612,7 @@ void purge_outstanding_packets(struct bat_priv *bat_priv,
                                   &bat_priv->forw_bcast_list, list) {
 
                 /**
-                 * if purge_outstanding_packets() was called with an argmument
+                 * if purge_outstanding_packets() was called with an argument
                  * we delete only packets belonging to the given interface
                  */
                 if ((hard_iface) &&
@@ -641,7 +641,7 @@ void purge_outstanding_packets(struct bat_priv *bat_priv,
                                   &bat_priv->forw_bat_list, list) {
 
                 /**
-                 * if purge_outstanding_packets() was called with an argmument
+                 * if purge_outstanding_packets() was called with an argument
                  * we delete only packets belonging to the given interface
                  */
                 if ((hard_iface) &&
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 3e2f91ffa4e2..402fd96239d8 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -532,11 +532,11 @@ static int interface_set_mac_addr(struct net_device *dev, void *p)
         if (!is_valid_ether_addr(addr->sa_data))
                 return -EADDRNOTAVAIL;
 
-        /* only modify transtable if it has been initialised before */
+        /* only modify transtable if it has been initialized before */
         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
                 tt_local_remove(bat_priv, dev->dev_addr,
                                 "mac address changed", false);
-                tt_local_add(dev, addr->sa_data);
+                tt_local_add(dev, addr->sa_data, NULL_IFINDEX);
         }
 
         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
@@ -595,9 +595,10 @@ static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
                 goto dropped;
 
         /* Register the client MAC in the transtable */
-        tt_local_add(soft_iface, ethhdr->h_source);
+        tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif);
 
-        orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+        orig_node = transtable_search(bat_priv, ethhdr->h_source,
+                                      ethhdr->h_dest);
         if (is_multicast_ether_addr(ethhdr->h_dest) ||
                                 (orig_node && orig_node->gw_flags)) {
                 ret = gw_is_target(bat_priv, skb, orig_node);
@@ -739,6 +740,9 @@ 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 +816,7 @@ 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 fb6931d00cd7..cc53f78e448c 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -183,7 +183,8 @@ static int tt_local_init(struct bat_priv *bat_priv)
         return 1;
 }
 
-void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
+void tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
+                  int ifindex)
 {
         struct bat_priv *bat_priv = netdev_priv(soft_iface);
         struct tt_local_entry *tt_local_entry = NULL;
@@ -207,6 +208,8 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
         memcpy(tt_local_entry->addr, addr, ETH_ALEN);
         tt_local_entry->last_seen = jiffies;
         tt_local_entry->flags = NO_FLAGS;
+        if (is_wifi_iface(ifindex))
+                tt_local_entry->flags |= TT_CLIENT_WIFI;
         atomic_set(&tt_local_entry->refcount, 2);
 
         /* the batman interface mac address should never be purged */
@@ -329,7 +332,7 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
 
                 rcu_read_lock();
                 __hlist_for_each_rcu(node, head)
-                        buf_size += 21;
+                        buf_size += 29;
                 rcu_read_unlock();
         }
 
@@ -348,8 +351,19 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
                 rcu_read_lock();
                 hlist_for_each_entry_rcu(tt_local_entry, node,
                                          head, hash_entry) {
-                        pos += snprintf(buff + pos, 22, " * %pM\n",
-                                        tt_local_entry->addr);
+                        pos += snprintf(buff + pos, 30, " * %pM "
+                                        "[%c%c%c%c%c]\n",
+                                        tt_local_entry->addr,
+                                        (tt_local_entry->flags &
+                                         TT_CLIENT_ROAM ? 'R' : '.'),
+                                        (tt_local_entry->flags &
+                                         TT_CLIENT_NOPURGE ? 'P' : '.'),
+                                        (tt_local_entry->flags &
+                                         TT_CLIENT_NEW ? 'N' : '.'),
+                                        (tt_local_entry->flags &
+                                         TT_CLIENT_PENDING ? 'X' : '.'),
+                                        (tt_local_entry->flags &
+                                         TT_CLIENT_WIFI ? 'W' : '.'));
                 }
                 rcu_read_unlock();
         }
@@ -369,8 +383,8 @@ static void tt_local_set_pending(struct bat_priv *bat_priv,
         tt_local_event(bat_priv, tt_local_entry->addr,
                        tt_local_entry->flags | flags);
 
-        /* The local client has to be merked as "pending to be removed" but has
-         * to be kept in the table in order to send it in an full tables
+        /* The local client has to be marked as "pending to be removed" but has
+         * to be kept in the table in order to send it in a full table
          * response issued before the net ttvn increment (consistency check) */
         tt_local_entry->flags |= TT_CLIENT_PENDING;
 }
@@ -495,7 +509,8 @@ static void tt_changes_list_free(struct bat_priv *bat_priv)
 
 /* caller must hold orig_node refcount */
 int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
-                  const unsigned char *tt_addr, uint8_t ttvn, bool roaming)
+                  const unsigned char *tt_addr, uint8_t ttvn, bool roaming,
+                  bool wifi)
 {
         struct tt_global_entry *tt_global_entry;
         struct orig_node *orig_node_tmp;
@@ -537,6 +552,9 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
                 tt_global_entry->roam_at = 0;
         }
 
+        if (wifi)
+                tt_global_entry->flags |= TT_CLIENT_WIFI;
+
         bat_dbg(DBG_TT, bat_priv,
                 "Creating new global tt entry: %pM (via %pM)\n",
                 tt_global_entry->addr, orig_node->orig);
@@ -582,8 +600,8 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
         seq_printf(seq,
                    "Globally announced TT entries received via the mesh %s\n",
                    net_dev->name);
-        seq_printf(seq, "       %-13s %s       %-15s %s\n",
-                   "Client", "(TTVN)", "Originator", "(Curr TTVN)");
+        seq_printf(seq, "       %-13s %s       %-15s %s %s\n",
+                   "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags");
 
         buf_size = 1;
         /* Estimate length for: " * xx:xx:xx:xx:xx:xx (ttvn) via
@@ -593,7 +611,7 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
 
                 rcu_read_lock();
                 __hlist_for_each_rcu(node, head)
-                        buf_size += 59;
+                        buf_size += 67;
                 rcu_read_unlock();
         }
 
@@ -612,14 +630,20 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
                 rcu_read_lock();
                 hlist_for_each_entry_rcu(tt_global_entry, node,
                                          head, hash_entry) {
-                        pos += snprintf(buff + pos, 61,
-                                        " * %pM  (%3u) via %pM     (%3u)\n",
-                                        tt_global_entry->addr,
+                        pos += snprintf(buff + pos, 69,
+                                        " * %pM  (%3u) via %pM     (%3u)   "
+                                        "[%c%c%c]\n", tt_global_entry->addr,
                                         tt_global_entry->ttvn,
                                         tt_global_entry->orig_node->orig,
                                         (uint8_t) atomic_read(
                                                 &tt_global_entry->orig_node->
-                                                last_ttvn));
+                                                last_ttvn),
+                                        (tt_global_entry->flags &
+                                         TT_CLIENT_ROAM ? 'R' : '.'),
+                                        (tt_global_entry->flags &
+                                         TT_CLIENT_PENDING ? 'X' : '.'),
+                                        (tt_global_entry->flags &
+                                         TT_CLIENT_WIFI ? 'W' : '.'));
                 }
                 rcu_read_unlock();
         }
@@ -774,30 +798,56 @@ 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)
+                                    const uint8_t *src, const uint8_t *addr)
 {
-        struct tt_global_entry *tt_global_entry;
+        struct tt_local_entry *tt_local_entry = NULL;
+        struct tt_global_entry *tt_global_entry = NULL;
         struct orig_node *orig_node = NULL;
 
-        tt_global_entry = tt_global_hash_find(bat_priv, addr);
+        if (src && atomic_read(&bat_priv->ap_isolation)) {
+                tt_local_entry = tt_local_hash_find(bat_priv, src);
+                if (!tt_local_entry)
+                        goto out;
+        }
 
+        tt_global_entry = tt_global_hash_find(bat_priv, addr);
         if (!tt_global_entry)
                 goto out;
 
+        /* check whether the clients should not communicate due to AP
+         * isolation */
+        if (tt_local_entry && _is_ap_isolated(tt_local_entry, tt_global_entry))
+                goto out;
+
         if (!atomic_inc_not_zero(&tt_global_entry->orig_node->refcount))
-                goto free_tt;
+                goto out;
 
         /* A global client marked as PENDING has already moved from that
          * originator */
         if (tt_global_entry->flags & TT_CLIENT_PENDING)
-                goto free_tt;
+                goto out;
 
         orig_node = tt_global_entry->orig_node;
 
-free_tt:
-        tt_global_entry_free_ref(tt_global_entry);
 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 orig_node;
 }
 
@@ -1029,8 +1079,9 @@ out:
         return skb;
 }
 
-int send_tt_request(struct bat_priv *bat_priv, struct orig_node *dst_orig_node,
-                    uint8_t ttvn, uint16_t tt_crc, bool full_table)
+static int send_tt_request(struct bat_priv *bat_priv,
+                           struct orig_node *dst_orig_node,
+                           uint8_t ttvn, uint16_t tt_crc, bool full_table)
 {
         struct sk_buff *skb = NULL;
         struct tt_query_packet *tt_request;
@@ -1137,12 +1188,12 @@ static bool send_other_tt_response(struct bat_priv *bat_priv,
         orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
         req_ttvn = tt_request->ttvn;
 
-        /* I have not the requested data */
+        /* I don't have the requested data */
         if (orig_ttvn != req_ttvn ||
             tt_request->tt_data != req_dst_orig_node->tt_crc)
                 goto out;
 
-        /* If it has explicitly been requested the full table */
+        /* If the full table has been explicitly requested */
         if (tt_request->flags & TT_FULL_TABLE ||
             !req_dst_orig_node->tt_buff)
                 full_table = true;
@@ -1363,7 +1414,9 @@ static void _tt_update_changes(struct bat_priv *bat_priv,
                                       (tt_change + i)->flags & TT_CLIENT_ROAM);
                 else
                         if (!tt_global_add(bat_priv, orig_node,
-                                           (tt_change + i)->addr, ttvn, false))
+                                           (tt_change + i)->addr, ttvn, false,
+                                           (tt_change + i)->flags &
+                                                        TT_CLIENT_WIFI))
                                 /* In case of problem while storing a
                                  * global_entry, we stop the updating
                                  * procedure without committing the
@@ -1403,9 +1456,10 @@ out:
                 orig_node_free_ref(orig_node);
 }
 
-void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
-                       uint16_t tt_num_changes, uint8_t ttvn,
-                       struct tt_change *tt_change)
+static void tt_update_changes(struct bat_priv *bat_priv,
+                              struct orig_node *orig_node,
+                              uint16_t tt_num_changes, uint8_t ttvn,
+                              struct tt_change *tt_change)
 {
         _tt_update_changes(bat_priv, orig_node, tt_change, tt_num_changes,
                            ttvn);
@@ -1720,3 +1774,90 @@ 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;
+}
+
+void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
+                    const unsigned char *tt_buff, uint8_t tt_num_changes,
+                    uint8_t ttvn, uint16_t tt_crc)
+{
+        uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+        bool full_table = true;
+
+        /* the ttvn increased by one -> we can apply the attached changes */
+        if (ttvn - orig_ttvn == 1) {
+                /* the OGM could not contain the changes due to their size or
+                 * because they have already been sent TT_OGM_APPEND_MAX times.
+                 * In this case send a tt request */
+                if (!tt_num_changes) {
+                        full_table = false;
+                        goto request_table;
+                }
+
+                tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
+                                  (struct tt_change *)tt_buff);
+
+                /* Even if we received the precomputed crc with the OGM, we
+                 * prefer to recompute it to spot any possible inconsistency
+                 * in the global table */
+                orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
+
+                /* The ttvn alone is not enough to guarantee consistency
+                 * because a single value could represent different states
+                 * (due to the wrap around). Thus a node has to check whether
+                 * the resulting table (after applying the changes) is still
+                 * consistent or not. E.g. a node could disconnect while its
+                 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
+                 * checking the CRC value is mandatory to detect the
+                 * inconsistency */
+                if (orig_node->tt_crc != tt_crc)
+                        goto request_table;
+
+                /* Roaming phase is over: tables are in sync again. I can
+                 * unset the flag */
+                orig_node->tt_poss_change = false;
+        } else {
+                /* if we missed more than one change or our tables are not
+                 * in sync anymore -> request fresh tt data */
+                if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
+request_table:
+                        bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
+                                "Need to retrieve the correct information "
+                                "(ttvn: %u last_ttvn: %u crc: %u last_crc: "
+                                "%u num_changes: %u)\n", orig_node->orig, ttvn,
+                                orig_ttvn, tt_crc, orig_node->tt_crc,
+                                tt_num_changes);
+                        send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
+                                        full_table);
+                        return;
+                }
+        }
+}
diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
index d4122cba53b8..30efd49881a3 100644
--- a/net/batman-adv/translation-table.h
+++ b/net/batman-adv/translation-table.h
@@ -26,15 +26,16 @@ int tt_len(int changes_num);
 int tt_changes_fill_buffer(struct bat_priv *bat_priv,
                            unsigned char *buff, int buff_len);
 int tt_init(struct bat_priv *bat_priv);
-void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
+void tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
+                  int ifindex);
 void tt_local_remove(struct bat_priv *bat_priv,
                      const uint8_t *addr, const char *message, bool roaming);
 int tt_local_seq_print_text(struct seq_file *seq, void *offset);
 void tt_global_add_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
                         const unsigned char *tt_buff, int tt_buff_len);
-int tt_global_add(struct bat_priv *bat_priv,
-                  struct orig_node *orig_node, const unsigned char *addr,
-                  uint8_t ttvn, bool roaming);
+int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
+                  const unsigned char *addr, uint8_t ttvn, bool roaming,
+                  bool wifi);
 int tt_global_seq_print_text(struct seq_file *seq, void *offset);
 void tt_global_del_orig(struct bat_priv *bat_priv,
                         struct orig_node *orig_node, const char *message);
@@ -42,25 +43,23 @@ void tt_global_del(struct bat_priv *bat_priv,
                    struct orig_node *orig_node, const unsigned char *addr,
                    const char *message, bool roaming);
 struct orig_node *transtable_search(struct bat_priv *bat_priv,
-                                    const uint8_t *addr);
+                                    const uint8_t *src, const uint8_t *addr);
 void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
                          const unsigned char *tt_buff, uint8_t tt_num_changes);
 uint16_t tt_local_crc(struct bat_priv *bat_priv);
 uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node);
 void tt_free(struct bat_priv *bat_priv);
-int send_tt_request(struct bat_priv *bat_priv,
-                    struct orig_node *dst_orig_node, uint8_t hvn,
-                    uint16_t tt_crc, bool full_table);
 bool send_tt_response(struct bat_priv *bat_priv,
                       struct tt_query_packet *tt_request);
-void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
-                       uint16_t tt_num_changes, uint8_t ttvn,
-                       struct tt_change *tt_change);
 bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
 void handle_tt_response(struct bat_priv *bat_priv,
                         struct tt_query_packet *tt_response);
 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);
+void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
+                    const unsigned char *tt_buff, uint8_t tt_num_changes,
+                    uint8_t ttvn, uint16_t tt_crc);
 
 #endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 25bd1db35370..1ae355750511 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -57,7 +57,7 @@ struct hard_iface {
  *      @batman_seqno_reset: time when the batman seqno window was reset
  *      @gw_flags: flags related to gateway class
  *      @flags: for now only VIS_SERVER flag
- *      @last_real_seqno: last and best known squence number
+ *      @last_real_seqno: last and best known sequence number
  *      @last_ttl: ttl of last received packet
  *      @last_bcast_seqno: last broadcast sequence number received by this host
  *
@@ -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 */
@@ -156,7 +157,7 @@ struct bat_priv {
         atomic_t bcast_seqno;
         atomic_t bcast_queue_left;
         atomic_t batman_queue_left;
-        atomic_t ttvn; /* tranlation table version number */
+        atomic_t ttvn; /* translation table version number */
         atomic_t tt_ogm_append_cnt;
         atomic_t tt_local_changes; /* changes registered in a OGM interval */
         /* The tt_poss_change flag is used to detect an ongoing roaming phase.
diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index 32b125fb3d3b..07d1c1da89dd 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -299,8 +299,10 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
                         goto find_router;
         }
 
-        /* check for tt host - increases orig_node refcount */
-        orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+        /* check for tt host - increases orig_node refcount.
+         * returns NULL in case of AP isolation */
+        orig_node = transtable_search(bat_priv, ethhdr->h_source,
+                                      ethhdr->h_dest);
 
 find_router:
         /**
diff --git a/net/batman-adv/unicast.h b/net/batman-adv/unicast.h
index 62f54b954625..8fd5535544b9 100644
--- a/net/batman-adv/unicast.h
+++ b/net/batman-adv/unicast.h
@@ -24,7 +24,7 @@
 
 #include "packet.h"
 
-#define FRAG_TIMEOUT 10000      /* purge frag list entrys after time in ms */
+#define FRAG_TIMEOUT 10000      /* purge frag list entries after time in ms */
 #define FRAG_BUFFER_SIZE 6      /* number of list elements in buffer */
 
 int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index 8a1b98589d76..fb9b19fc638d 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -131,7 +131,7 @@ static void vis_data_insert_interface(const uint8_t *interface,
                         return;
         }
 
-        /* its a new address, add it to the list */
+        /* it's a new address, add it to the list */
         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
         if (!entry)
                 return;
@@ -465,7 +465,7 @@ static struct vis_info *add_packet(struct bat_priv *bat_priv,
         /* try to add it */
         hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
                               info, &info->hash_entry);
-        if (hash_added < 0) {
+        if (hash_added != 0) {
                 /* did not work (for some reason) */
                 kref_put(&info->refcount, free_info);
                 info = NULL;
@@ -920,7 +920,7 @@ int vis_init(struct bat_priv *bat_priv)
         hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
                               bat_priv->my_vis_info,
                               &bat_priv->my_vis_info->hash_entry);
-        if (hash_added < 0) {
+        if (hash_added != 0) {
                 pr_err("Can't add own vis packet into hash\n");
                 /* not in hash, need to remove it manually. */
                 kref_put(&bat_priv->my_vis_info->refcount, free_info);