pull request: batman-adv 2012-05-09

@@ -480,7 +480,8 @@ static void bat_iv_ogm_queue_add(struct bat_priv *bat_priv,
 static void bat_iv_ogm_forward(struct orig_node *orig_node,
 			       const struct ethhdr *ethhdr,
 			       struct batman_ogm_packet *batman_ogm_packet,
-			       int directlink, struct hard_iface *if_incoming)
+			       bool is_single_hop_neigh,
+			       struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct neigh_node *router;

@@ -533,7 +534,7 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 
 	/* switch of primaries first hop flag when forwarding */
 	batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP;
-	if (directlink)
+	if (is_single_hop_neigh)
 		batman_ogm_packet->flags |= DIRECTLINK;
 	else
 		batman_ogm_packet->flags &= ~DIRECTLINK;

@@ -918,7 +919,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	struct neigh_node *orig_neigh_router = NULL;
 	int has_directlink_flag;
 	int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
-	int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
+	int is_broadcast = 0, is_bidirectional;
+	bool is_single_hop_neigh = false;
 	int is_duplicate;
 	uint32_t if_incoming_seqno;
 

@@ -942,8 +944,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 
 	has_directlink_flag = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0);
 
-	is_single_hop_neigh = (compare_eth(ethhdr->h_source,
-					   batman_ogm_packet->orig) ? 1 : 0);
+	if (compare_eth(ethhdr->h_source, batman_ogm_packet->orig))
+		is_single_hop_neigh = true;
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",

@@ -1114,7 +1116,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 
 		/* mark direct link on incoming interface */
 		bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
-				   1, if_incoming);
+				   is_single_hop_neigh, if_incoming);
 
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Forwarding packet: rebroadcast neighbor packet with direct link flag\n");

@@ -1137,7 +1139,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Forwarding packet: rebroadcast originator packet\n");
 	bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
-			   0, if_incoming);
+			   is_single_hop_neigh, if_incoming);
 
 out_neigh:
 	if ((orig_neigh_node) && (!is_single_hop_neigh))

@@ -1155,13 +1155,18 @@ out:
 	orig_node_free_ref(orig_node);
 }
 
-static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
-			       struct sk_buff *skb)
+static int bat_iv_ogm_receive(struct sk_buff *skb,
+			      struct hard_iface *if_incoming)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 	struct ethhdr *ethhdr;
 	int buff_pos = 0, packet_len;
 	unsigned char *tt_buff, *packet_buff;
+	bool ret;
+
+	ret = check_management_packet(skb, if_incoming, BATMAN_OGM_HLEN);
+	if (!ret)
+		return NET_RX_DROP;
 
 	packet_len = skb_headlen(skb);
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);

@@ -1187,6 +1192,9 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
 						(packet_buff + buff_pos);
 	} while (bat_iv_ogm_aggr_packet(buff_pos, packet_len,
 					batman_ogm_packet->tt_num_changes));
+
+	kfree_skb(skb);
+	return NET_RX_SUCCESS;
 }
 
 static struct bat_algo_ops batman_iv __read_mostly = {

@@ -1197,10 +1205,25 @@ static struct bat_algo_ops batman_iv __read_mostly = {
 	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,
 	.bat_ogm_emit = bat_iv_ogm_emit,
-	.bat_ogm_receive = bat_iv_ogm_receive,
 };
 
 int __init bat_iv_init(void)
 {
-	return bat_algo_register(&batman_iv);
+	int ret;
+
+	/* batman originator packet */
+	ret = recv_handler_register(BAT_IV_OGM, bat_iv_ogm_receive);
+	if (ret < 0)
+		goto out;
+
+	ret = bat_algo_register(&batman_iv);
+	if (ret < 0)
+		goto handler_unregister;
+
+	goto out;
+
+handler_unregister:
+	recv_handler_unregister(BAT_IV_OGM);
+out:
+	return ret;
 }

@@ -266,8 +266,6 @@ static void recv_handler_init(void)
 	for (i = 0; i < ARRAY_SIZE(recv_packet_handler); i++)
 		recv_packet_handler[i] = recv_unhandled_packet;
 
-	/* batman originator packet */
-	recv_packet_handler[BAT_IV_OGM] = recv_bat_ogm_packet;
 	/* batman icmp packet */
 	recv_packet_handler[BAT_ICMP] = recv_icmp_packet;
 	/* unicast packet */

@@ -334,8 +332,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 	    !bat_algo_ops->bat_primary_iface_set ||
 	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||
-	    !bat_algo_ops->bat_ogm_emit ||
-	    !bat_algo_ops->bat_ogm_receive) {
+	    !bat_algo_ops->bat_ogm_emit) {
 		pr_info("Routing algo '%s' does not implement required ops\n",
 			bat_algo_ops->name);
 		goto out;

@@ -248,37 +248,35 @@ int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff,
 	return 0;
 }
 
-int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
+bool check_management_packet(struct sk_buff *skb,
+			     struct hard_iface *hard_iface,
+			     int header_len)
 {
-	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct ethhdr *ethhdr;
 
 	/* drop packet if it has not necessary minimum size */
-	if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_HLEN)))
-		return NET_RX_DROP;
+	if (unlikely(!pskb_may_pull(skb, header_len)))
+		return false;
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
 	/* packet with broadcast indication but unicast recipient */
 	if (!is_broadcast_ether_addr(ethhdr->h_dest))
-		return NET_RX_DROP;
+		return false;
 
 	/* packet with broadcast sender address */
 	if (is_broadcast_ether_addr(ethhdr->h_source))
-		return NET_RX_DROP;
+		return false;
 
 	/* create a copy of the skb, if needed, to modify it. */
 	if (skb_cow(skb, 0) < 0)
-		return NET_RX_DROP;
+		return false;
 
 	/* keep skb linear */
 	if (skb_linearize(skb) < 0)
-		return NET_RX_DROP;
+		return false;
 
-	bat_priv->bat_algo_ops->bat_ogm_receive(hard_iface, skb);
-
-	kfree_skb(skb);
-	return NET_RX_SUCCESS;
+	return true;
 }
 
 static int recv_my_icmp_packet(struct bat_priv *bat_priv,

@@ -23,6 +23,9 @@
 #define _NET_BATMAN_ADV_ROUTING_H_
 
 void slide_own_bcast_window(struct hard_iface *hard_iface);
+bool check_management_packet(struct sk_buff *skb,
+			     struct hard_iface *hard_iface,
+			     int header_len);
 void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
 		  struct neigh_node *neigh_node);
 int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);

@@ -30,7 +33,6 @@ int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
-int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if);
 struct neigh_node *find_router(struct bat_priv *bat_priv,

@@ -390,9 +390,6 @@ struct bat_algo_ops {
 				 int tt_num_changes);
 	/* send scheduled OGM */
 	void (*bat_ogm_emit)(struct forw_packet *forw_packet);
-	/* receive incoming OGM */
-	void (*bat_ogm_receive)(struct hard_iface *if_incoming,
-				struct sk_buff *skb);
 };
 
 #endif /* _NET_BATMAN_ADV_TYPES_H_ */

@@ -651,7 +651,7 @@ static void bat_iv_ogm_orig_update(struct bat_priv *bat_priv,
 	rcu_read_unlock();
 
 	orig_node->flags = batman_ogm_packet->flags;
-	neigh_node->last_valid = jiffies;
+	neigh_node->last_seen = jiffies;
 
 	spin_lock_bh(&neigh_node->tq_lock);
 	ring_buffer_set(neigh_node->tq_recv,

@@ -772,11 +772,11 @@ static int bat_iv_ogm_calc_tq(struct orig_node *orig_node,
 	if (!neigh_node)
 		goto out;
 
-	/* if orig_node is direct neighbor update neigh_node last_valid */
+	/* if orig_node is direct neighbor update neigh_node last_seen */
 	if (orig_node == orig_neigh_node)
-		neigh_node->last_valid = jiffies;
+		neigh_node->last_seen = jiffies;
 
-	orig_node->last_valid = jiffies;
+	orig_node->last_seen = jiffies;
 
 	/* find packet count of corresponding one hop neighbor */
 	spin_lock_bh(&orig_node->ogm_cnt_lock);

@@ -283,7 +283,7 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 	hlist_for_each_entry_safe(neigh_node, node, node_tmp,
 				  &orig_node->neigh_list, list) {
 
-		if ((has_timed_out(neigh_node->last_valid, PURGE_TIMEOUT)) ||
+		if ((has_timed_out(neigh_node->last_seen, PURGE_TIMEOUT)) ||
 		    (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
 		    (neigh_node->if_incoming->if_status == IF_NOT_IN_USE) ||
 		    (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {

@@ -300,9 +300,9 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 					neigh_node->if_incoming->net_dev->name);
 			else
 				bat_dbg(DBG_BATMAN, bat_priv,
-					"neighbor timeout: originator %pM, neighbor: %pM, last_valid: %lu\n",
+					"neighbor timeout: originator %pM, neighbor: %pM, last_seen: %lu\n",
 					orig_node->orig, neigh_node->addr,
-					(neigh_node->last_valid / HZ));
+					(neigh_node->last_seen / HZ));
 
 			neigh_purged = true;
 

@@ -325,10 +325,10 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
 {
 	struct neigh_node *best_neigh_node;
 
-	if (has_timed_out(orig_node->last_valid, 2 * PURGE_TIMEOUT)) {
+	if (has_timed_out(orig_node->last_seen, 2 * PURGE_TIMEOUT)) {
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"Originator timeout: originator %pM, last_valid %lu\n",
-			orig_node->orig, (orig_node->last_valid / HZ));
+			"Originator timeout: originator %pM, last_seen %lu\n",
+			orig_node->orig, (orig_node->last_seen / HZ));
 		return true;
 	} else {
 		if (purge_orig_neighbors(bat_priv, orig_node,

@@ -446,9 +446,9 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 				goto next;
 
 			last_seen_secs = jiffies_to_msecs(jiffies -
-						orig_node->last_valid) / 1000;
+						orig_node->last_seen) / 1000;
 			last_seen_msecs = jiffies_to_msecs(jiffies -
-						orig_node->last_valid) % 1000;
+						orig_node->last_seen) % 1000;
 
 			seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
 				   orig_node->orig, last_seen_secs,

@@ -52,7 +52,7 @@ struct hard_iface {
 /**
  *	orig_node - structure for orig_list maintaining nodes of mesh
  *	@primary_addr: hosts primary interface address
- *	@last_valid: when last packet from this node was received
+ *	@last_seen: when last packet from this node was received
  *	@bcast_seqno_reset: time when the broadcast seqno window was reset
  *	@batman_seqno_reset: time when the batman seqno window was reset
  *	@gw_flags: flags related to gateway class

@@ -70,7 +70,7 @@ struct orig_node {
 	struct neigh_node __rcu *router; /* rcu protected pointer */
 	unsigned long *bcast_own;
 	uint8_t *bcast_own_sum;
-	unsigned long last_valid;
+	unsigned long last_seen;
 	unsigned long bcast_seqno_reset;
 	unsigned long batman_seqno_reset;
 	uint8_t gw_flags;

@@ -120,7 +120,7 @@ struct gw_node {
 
 /**
  *	neigh_node
- *	@last_valid: when last packet via this neighbor was received
+ *	@last_seen: when last packet via this neighbor was received
  */
 struct neigh_node {
 	struct hlist_node list;

@@ -131,7 +131,7 @@ struct neigh_node {
 	uint8_t tq_avg;
 	uint8_t last_ttl;
 	struct list_head bonding_list;
-	unsigned long last_valid;
+	unsigned long last_seen;
 	DECLARE_BITMAP(real_bits, TQ_LOCAL_WINDOW_SIZE);
 	atomic_t refcount;
 	struct rcu_head rcu;

@@ -83,8 +83,8 @@ int debug_log(struct bat_priv *bat_priv, const char *fmt, ...)
 
 	va_start(args, fmt);
 	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
-	fdebug_log(bat_priv->debug_log, "[%10lu] %s",
-		   (jiffies / HZ), tmp_log_buf);
+	fdebug_log(bat_priv->debug_log, "[%10u] %s",
+		   jiffies_to_msecs(jiffies), tmp_log_buf);
 	va_end(args);
 
 	return 0;

@@ -35,7 +35,8 @@ static void purge_orig(struct work_struct *work);
 static void start_purge_timer(struct bat_priv *bat_priv)
 {
 	INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
-	queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
+	queue_delayed_work(bat_event_workqueue,
+			   &bat_priv->orig_work, msecs_to_jiffies(1000));
 }
 
 /* returns 1 if they are the same originator */

@@ -274,6 +275,7 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 	struct hlist_node *node, *node_tmp;
 	struct neigh_node *neigh_node;
 	bool neigh_purged = false;
+	unsigned long last_seen;
 
 	*best_neigh_node = NULL;
 

@@ -288,6 +290,8 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 		    (neigh_node->if_incoming->if_status == IF_NOT_IN_USE) ||
 		    (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
 
+			last_seen = neigh_node->last_seen;
+
 			if ((neigh_node->if_incoming->if_status ==
 								IF_INACTIVE) ||
 			    (neigh_node->if_incoming->if_status ==

@@ -300,9 +304,9 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 					neigh_node->if_incoming->net_dev->name);
 			else
 				bat_dbg(DBG_BATMAN, bat_priv,
-					"neighbor timeout: originator %pM, neighbor: %pM, last_seen: %lu\n",
+					"neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
 					orig_node->orig, neigh_node->addr,
-					(neigh_node->last_seen / HZ));
+					jiffies_to_msecs(last_seen));
 
 			neigh_purged = true;
 

@@ -327,8 +331,9 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
 
 	if (has_timed_out(orig_node->last_seen, 2 * PURGE_TIMEOUT)) {
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"Originator timeout: originator %pM, last_seen %lu\n",
-			orig_node->orig, (orig_node->last_seen / HZ));
+			"Originator timeout: originator %pM, last_seen %u\n",
+			orig_node->orig,
+			jiffies_to_msecs(orig_node->last_seen));
 		return true;
 	} else {
 		if (purge_orig_neighbors(bat_priv, orig_node,

@@ -292,7 +292,7 @@ static void send_outstanding_bcast_packet(struct work_struct *work)
 	/* if we still have some more bcasts to send */
 	if (forw_packet->num_packets < 3) {
 		_add_bcast_packet_to_list(bat_priv, forw_packet,
-					  ((5 * HZ) / 1000));
+					  msecs_to_jiffies(5));
 		return;
 	}
 

@@ -30,6 +30,32 @@
 #include "send.h"
 #include "bat_algo.h"
 
+static struct neigh_node *bat_iv_ogm_neigh_new(struct hard_iface *hard_iface,
+					       const uint8_t *neigh_addr,
+					       struct orig_node *orig_node,
+					       struct orig_node *orig_neigh,
+					       uint32_t seqno)
+{
+	struct neigh_node *neigh_node;
+
+	neigh_node = neigh_node_new(hard_iface, neigh_addr, seqno);
+	if (!neigh_node)
+		goto out;
+
+	INIT_LIST_HEAD(&neigh_node->bonding_list);
+	spin_lock_init(&neigh_node->tq_lock);
+
+	neigh_node->orig_node = orig_neigh;
+	neigh_node->if_incoming = hard_iface;
+
+	spin_lock_bh(&orig_node->neigh_list_lock);
+	hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
+	spin_unlock_bh(&orig_node->neigh_list_lock);
+
+out:
+	return neigh_node;
+}
+
 static int bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;

@@ -638,8 +664,9 @@ static void bat_iv_ogm_orig_update(struct bat_priv *bat_priv,
 		if (!orig_tmp)
 			goto unlock;
 
-		neigh_node = create_neighbor(orig_node, orig_tmp,
-					     ethhdr->h_source, if_incoming);
+		neigh_node = bat_iv_ogm_neigh_new(if_incoming, ethhdr->h_source,
+						  orig_node, orig_tmp,
+						  batman_ogm_packet->seqno);
 
 		orig_node_free_ref(orig_tmp);
 		if (!neigh_node)

@@ -764,10 +791,11 @@ static int bat_iv_ogm_calc_tq(struct orig_node *orig_node,
 	rcu_read_unlock();
 
 	if (!neigh_node)
-		neigh_node = create_neighbor(orig_neigh_node,
-					     orig_neigh_node,
-					     orig_neigh_node->orig,
-					     if_incoming);
+		neigh_node = bat_iv_ogm_neigh_new(if_incoming,
+						  orig_neigh_node->orig,
+						  orig_neigh_node,
+						  orig_neigh_node,
+						  batman_ogm_packet->seqno);
 
 	if (!neigh_node)
 		goto out;

@@ -85,35 +85,28 @@ struct neigh_node *orig_node_get_router(struct orig_node *orig_node)
 	return router;
 }
 
-struct neigh_node *create_neighbor(struct orig_node *orig_node,
-				   struct orig_node *orig_neigh_node,
-				   const uint8_t *neigh,
-				   struct hard_iface *if_incoming)
+struct neigh_node *neigh_node_new(struct hard_iface *hard_iface,
+				  const uint8_t *neigh_addr, uint32_t seqno)
 {
-	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct neigh_node *neigh_node;
 
-	bat_dbg(DBG_BATMAN, bat_priv,
-		"Creating new last-hop neighbor of originator\n");
-
 	neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
 	if (!neigh_node)
-		return NULL;
+		goto out;
 
 	INIT_HLIST_NODE(&neigh_node->list);
-	INIT_LIST_HEAD(&neigh_node->bonding_list);
-	spin_lock_init(&neigh_node->tq_lock);
 
-	memcpy(neigh_node->addr, neigh, ETH_ALEN);
-	neigh_node->orig_node = orig_neigh_node;
-	neigh_node->if_incoming = if_incoming;
+	memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
 
 	/* extra reference for return */
 	atomic_set(&neigh_node->refcount, 2);
 
-	spin_lock_bh(&orig_node->neigh_list_lock);
-	hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
-	spin_unlock_bh(&orig_node->neigh_list_lock);
+	bat_dbg(DBG_BATMAN, bat_priv,
+		"Creating new neighbor %pM, initial seqno %d\n",
+		neigh_addr, seqno);
+
+out:
 	return neigh_node;
 }
 

@@ -29,10 +29,8 @@ void originator_free(struct bat_priv *bat_priv);
 void purge_orig_ref(struct bat_priv *bat_priv);
 void orig_node_free_ref(struct orig_node *orig_node);
 struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr);
-struct neigh_node *create_neighbor(struct orig_node *orig_node,
-				   struct orig_node *orig_neigh_node,
-				   const uint8_t *neigh,
-				   struct hard_iface *if_incoming);
+struct neigh_node *neigh_node_new(struct hard_iface *hard_iface,
+				  const uint8_t *neigh_addr, uint32_t seqno);
 void neigh_node_free_ref(struct neigh_node *neigh_node);
 struct neigh_node *orig_node_get_router(struct orig_node *orig_node);
 int orig_seq_print_text(struct seq_file *seq, void *offset);

@@ -1186,6 +1186,7 @@ out:
 static int bat_iv_ogm_receive(struct sk_buff *skb,
 			      struct hard_iface *if_incoming)
 {
+	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct batman_ogm_packet *batman_ogm_packet;
 	struct ethhdr *ethhdr;
 	int buff_pos = 0, packet_len;

@@ -1196,6 +1197,11 @@ static int bat_iv_ogm_receive(struct sk_buff *skb,
 	if (!ret)
 		return NET_RX_DROP;
 
+	/* did we receive a B.A.T.M.A.N. IV OGM packet on an interface
+	 * that does not have B.A.T.M.A.N. IV enabled ? */
+	if (bat_priv->bat_algo_ops->bat_ogm_emit != bat_iv_ogm_emit)
+		return NET_RX_DROP;
+
 	packet_len = skb_headlen(skb);
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 	packet_buff = skb->data;

@@ -93,6 +93,17 @@ static void bat_iv_ogm_iface_disable(struct hard_iface *hard_iface)
 	hard_iface->packet_buff = NULL;
 }
 
+static void bat_iv_ogm_iface_update_mac(struct hard_iface *hard_iface)
+{
+	struct batman_ogm_packet *batman_ogm_packet;
+
+	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
+	memcpy(batman_ogm_packet->orig,
+	       hard_iface->net_dev->dev_addr, ETH_ALEN);
+	memcpy(batman_ogm_packet->prev_sender,
+	       hard_iface->net_dev->dev_addr, ETH_ALEN);
+}
+
 static void bat_iv_ogm_primary_iface_set(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;

@@ -102,17 +113,6 @@ static void bat_iv_ogm_primary_iface_set(struct hard_iface *hard_iface)
 	batman_ogm_packet->header.ttl = TTL;
 }
 
-static void bat_iv_ogm_update_mac(struct hard_iface *hard_iface)
-{
-	struct batman_ogm_packet *batman_ogm_packet;
-
-	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
-	memcpy(batman_ogm_packet->orig,
-	       hard_iface->net_dev->dev_addr, ETH_ALEN);
-	memcpy(batman_ogm_packet->prev_sender,
-	       hard_iface->net_dev->dev_addr, ETH_ALEN);
-}
-
 /* when do we schedule our own ogm to be sent */
 static unsigned long bat_iv_ogm_emit_send_time(const struct bat_priv *bat_priv)
 {

@@ -1235,8 +1235,8 @@ static struct bat_algo_ops batman_iv __read_mostly = {
 	.name = "BATMAN IV",
 	.bat_iface_enable = bat_iv_ogm_iface_enable,
 	.bat_iface_disable = bat_iv_ogm_iface_disable,
+	.bat_iface_update_mac = bat_iv_ogm_iface_update_mac,
 	.bat_primary_iface_set = bat_iv_ogm_primary_iface_set,
-	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,
 	.bat_ogm_emit = bat_iv_ogm_emit,
 };

@@ -228,7 +228,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
 
 	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface);
+	bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface);
 	hard_iface->if_status = IF_TO_BE_ACTIVATED;
 
 	/**

@@ -524,7 +524,7 @@ static int hard_if_event(struct notifier_block *this,
 		check_known_mac_addr(hard_iface->net_dev);
 
 		bat_priv = netdev_priv(hard_iface->soft_iface);
-		bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface);
+		bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface);
 
 		primary_if = primary_if_get_selected(bat_priv);
 		if (!primary_if)

@@ -329,8 +329,8 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 	/* all algorithms must implement all ops (for now) */
 	if (!bat_algo_ops->bat_iface_enable ||
 	    !bat_algo_ops->bat_iface_disable ||
+	    !bat_algo_ops->bat_iface_update_mac ||
 	    !bat_algo_ops->bat_primary_iface_set ||
-	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||
 	    !bat_algo_ops->bat_ogm_emit) {
 		pr_info("Routing algo '%s' does not implement required ops\n",

@@ -381,10 +381,11 @@ struct bat_algo_ops {
 	int (*bat_iface_enable)(struct hard_iface *hard_iface);
 	/* de-init routing info when hard-interface is disabled */
 	void (*bat_iface_disable)(struct hard_iface *hard_iface);
+	/* (re-)init mac addresses of the protocol information
+	 * belonging to this hard-interface */
+	void (*bat_iface_update_mac)(struct hard_iface *hard_iface);
 	/* called when primary interface is selected / changed */
 	void (*bat_primary_iface_set)(struct hard_iface *hard_iface);
-	/* init mac addresses of the OGM belonging to this hard-interface */
-	void (*bat_ogm_update_mac)(struct hard_iface *hard_iface);
 	/* prepare a new outgoing OGM for the send queue */
 	void (*bat_ogm_schedule)(struct hard_iface *hard_iface,
 				 int tt_num_changes);

@@ -63,7 +63,7 @@ struct bat_attribute bat_attr_##_name = {	\
 	.store  = _store,			\
 };
 
-#define BAT_ATTR_STORE_BOOL(_name, _post_func)				\
+#define BAT_ATTR_SIF_STORE_BOOL(_name, _post_func)			\
 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
 		      char *buff, size_t count)				\
 {									\

@@ -73,9 +73,9 @@ ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
 				 &bat_priv->_name, net_dev);		\
 }
 
-#define BAT_ATTR_SHOW_BOOL(_name)					\
-ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,	\
-			    char *buff)					\
+#define BAT_ATTR_SIF_SHOW_BOOL(_name)					\
+ssize_t show_##_name(struct kobject *kobj,				\
+		     struct attribute *attr, char *buff)		\
 {									\
 	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);		\
 	return sprintf(buff, "%s\n",					\

@@ -83,16 +83,17 @@ ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,	\
 		       "disabled" : "enabled");				\
 }									\
 
-/* Use this, if you are going to turn a [name] in bat_priv on or off */
-#define BAT_ATTR_BOOL(_name, _mode, _post_func)				\
-	static BAT_ATTR_STORE_BOOL(_name, _post_func)			\
-	static BAT_ATTR_SHOW_BOOL(_name)				\
+/* Use this, if you are going to turn a [name] in the soft-interface
+ * (bat_priv) on or off */
+#define BAT_ATTR_SIF_BOOL(_name, _mode, _post_func)			\
+	static BAT_ATTR_SIF_STORE_BOOL(_name, _post_func)		\
+	static BAT_ATTR_SIF_SHOW_BOOL(_name)				\
 	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 
 
-#define BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)		\
+#define BAT_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)		\
 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
-			     char *buff, size_t count)			\
+		      char *buff, size_t count)				\
 {									\
 	struct net_device *net_dev = kobj_to_netdev(kobj);		\
 	struct bat_priv *bat_priv = netdev_priv(net_dev);		\

@@ -100,19 +101,19 @@ ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
 				 attr, &bat_priv->_name, net_dev);	\
 }
 
-#define BAT_ATTR_SHOW_UINT(_name)					\
-ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,	\
-			    char *buff)					\
+#define BAT_ATTR_SIF_SHOW_UINT(_name)					\
+ssize_t show_##_name(struct kobject *kobj,				\
+		     struct attribute *attr, char *buff)		\
 {									\
 	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);		\
 	return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));	\
 }									\
 
-/* Use this, if you are going to set [name] in bat_priv to unsigned integer
- * values only */
-#define BAT_ATTR_UINT(_name, _mode, _min, _max, _post_func)		\
-	static BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)	\
-	static BAT_ATTR_SHOW_UINT(_name)				\
+/* Use this, if you are going to set [name] in the soft-interface
+ * (bat_priv) to an unsigned integer value */
+#define BAT_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)		\
+	static BAT_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)	\
+	static BAT_ATTR_SIF_SHOW_UINT(_name)				\
 	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 
 

@@ -384,24 +385,24 @@ static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 	return gw_bandwidth_set(net_dev, buff, count);
 }
 
-BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
-BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 #ifdef CONFIG_BATMAN_ADV_BLA
-BAT_ATTR_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 #endif
-BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
-BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
+BAT_ATTR_SIF_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(routing_algo, S_IRUGO, show_bat_algo, NULL);
 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);
-BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
-BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
-	      post_gw_deselect);
+BAT_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
+BAT_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
+BAT_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
+		  post_gw_deselect);
 static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
 		store_gw_bwidth);
 #ifdef CONFIG_BATMAN_ADV_DEBUG
-BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 15, NULL);
+BAT_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, 15, NULL);
 #endif
 
 static struct bat_attribute *mesh_attrs[] = {

@@ -507,11 +507,10 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 			       const struct ethhdr *ethhdr,
 			       struct batman_ogm_packet *batman_ogm_packet,
 			       bool is_single_hop_neigh,
+			       bool is_from_best_next_hop,
 			       struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
-	struct neigh_node *router;
-	uint8_t in_tq, in_ttl, tq_avg = 0;
 	uint8_t tt_num_changes;
 
 	if (batman_ogm_packet->header.ttl <= 1) {

@@ -519,41 +518,31 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 		return;
 	}
 
-	router = orig_node_get_router(orig_node);
+	if (!is_from_best_next_hop) {
+		/**
+		* Mark the forwarded packet when it is not coming from our best
+		* next hop. We still need to forward the packet for our neighbor
+		* link quality detection to work in case the packet originated
+		* from a single hop neighbor. Otherwise we can simply drop the
+		* ogm.
+		*/
+		if (is_single_hop_neigh)
+			batman_ogm_packet->flags |= NOT_BEST_NEXT_HOP;
+		else
+			return;
+	}
 
-	in_tq = batman_ogm_packet->tq;
-	in_ttl = batman_ogm_packet->header.ttl;
 	tt_num_changes = batman_ogm_packet->tt_num_changes;
 
 	batman_ogm_packet->header.ttl--;
 	memcpy(batman_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
 
-	/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
-	 * of our best tq value */
-	if (router && router->tq_avg != 0) {
-
-		/* rebroadcast ogm of best ranking neighbor as is */
-		if (!compare_eth(router->addr, ethhdr->h_source)) {
-			batman_ogm_packet->tq = router->tq_avg;
-
-			if (router->last_ttl)
-				batman_ogm_packet->header.ttl =
-					router->last_ttl - 1;
-		}
-
-		tq_avg = router->tq_avg;
-	}
-
-	if (router)
-		neigh_node_free_ref(router);
-
 	/* apply hop penalty */
 	batman_ogm_packet->tq = hop_penalty(batman_ogm_packet->tq, bat_priv);
 
 	bat_dbg(DBG_BATMAN, bat_priv,
-		"Forwarding packet: tq_orig: %i, tq_avg: %i, tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
-		in_tq, tq_avg, batman_ogm_packet->tq, in_ttl - 1,
-		batman_ogm_packet->header.ttl);
+		"Forwarding packet: tq: %i, ttl: %i\n",
+		batman_ogm_packet->tq, batman_ogm_packet->header.ttl);
 
 	batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
 	batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc);

@@ -949,6 +938,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
 	int is_broadcast = 0, is_bidirectional;
 	bool is_single_hop_neigh = false;
+	bool is_from_best_next_hop = false;
 	int is_duplicate;
 	uint32_t if_incoming_seqno;
 

@@ -1070,6 +1060,13 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 		return;
 	}
 
+	if (batman_ogm_packet->flags & NOT_BEST_NEXT_HOP) {
+		bat_dbg(DBG_BATMAN, bat_priv,
+			"Drop packet: ignoring all packets not forwarded from "
+			"the best next hop (sender: %pM)\n", ethhdr->h_source);
+		return;
+	}
+
 	orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig);
 	if (!orig_node)
 		return;

@@ -1094,6 +1091,10 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	if (router)
 		router_router = orig_node_get_router(router->orig_node);
 
+	if ((router && router->tq_avg != 0) &&
+	    (compare_eth(router->addr, ethhdr->h_source)))
+		is_from_best_next_hop = true;
+
 	/* avoid temporary routing loops */
 	if (router && router_router &&
 	    (compare_eth(router->addr, batman_ogm_packet->prev_sender)) &&

@@ -1144,7 +1145,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 
 		/* mark direct link on incoming interface */
 		bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
-				   is_single_hop_neigh, if_incoming);
+				   is_single_hop_neigh, is_from_best_next_hop,
+				   if_incoming);
 
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Forwarding packet: rebroadcast neighbor packet with direct link flag\n");

@@ -1167,7 +1169,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Forwarding packet: rebroadcast originator packet\n");
 	bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
-			   is_single_hop_neigh, if_incoming);
+			   is_single_hop_neigh, is_from_best_next_hop,
+			   if_incoming);
 
 out_neigh:
 	if ((orig_neigh_node) && (!is_single_hop_neigh))

@@ -117,6 +117,49 @@ ssize_t show_##_name(struct kobject *kobj,				\
 	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 
 
+#define BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)		\
+ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
+		      char *buff, size_t count)				\
+{									\
+	struct net_device *net_dev = kobj_to_netdev(kobj);		\
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);	\
+	ssize_t length;							\
+									\
+	if (!hard_iface)						\
+		return 0;						\
+									\
+	length = __store_uint_attr(buff, count, _min, _max, _post_func,	\
+				   attr, &hard_iface->_name, net_dev);	\
+									\
+	hardif_free_ref(hard_iface);					\
+	return length;							\
+}
+
+#define BAT_ATTR_HIF_SHOW_UINT(_name)					\
+ssize_t show_##_name(struct kobject *kobj,				\
+		     struct attribute *attr, char *buff)		\
+{									\
+	struct net_device *net_dev = kobj_to_netdev(kobj);		\
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);	\
+	ssize_t length;							\
+									\
+	if (!hard_iface)						\
+		return 0;						\
+									\
+	length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_name));\
+									\
+	hardif_free_ref(hard_iface);					\
+	return length;							\
+}
+
+/* Use this, if you are going to set [name] in hard_iface to an
+ * unsigned integer value*/
+#define BAT_ATTR_HIF_UINT(_name, _mode, _min, _max, _post_func)		\
+	static BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)	\
+	static BAT_ATTR_HIF_SHOW_UINT(_name)				\
+	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
+
+
 static int store_bool_attr(char *buff, size_t count,
 			   struct net_device *net_dev,
 			   const char *attr_name, atomic_t *attr)

@@ -39,6 +39,7 @@ enum bat_packettype {
 #define COMPAT_VERSION 14
 
 enum batman_iv_flags {
+	NOT_BEST_NEXT_HOP   = 1 << 3,
 	PRIMARIES_FIRST_HOP = 1 << 4,
 	VIS_SERVER	    = 1 << 5,
 	DIRECTLINK	    = 1 << 6

@@ -1062,8 +1062,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 
 	if (batman_ogm_packet->flags & NOT_BEST_NEXT_HOP) {
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"Drop packet: ignoring all packets not forwarded from "
-			"the best next hop (sender: %pM)\n", ethhdr->h_source);
+			"Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
+			ethhdr->h_source);
 		return;
 	}