1 files changed, 237 insertions, 99 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 6d51caaf8cec..13c88b25ab31 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -1,5 +1,4 @@
-/*
- * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
+/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
  *
  * Marek Lindner, Simon Wunderlich
  *
@@ -16,12 +15,11 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301, USA
- *
  */
 
 #include "main.h"
-#include "bat_sysfs.h"
-#include "bat_debugfs.h"
+#include "sysfs.h"
+#include "debugfs.h"
 #include "routing.h"
 #include "send.h"
 #include "originator.h"
@@ -30,62 +28,72 @@
 #include "translation-table.h"
 #include "hard-interface.h"
 #include "gateway_client.h"
+#include "bridge_loop_avoidance.h"
 #include "vis.h"
 #include "hash.h"
 #include "bat_algo.h"
 
 
 /* List manipulations on hardif_list have to be rtnl_lock()'ed,
- * list traversals just rcu-locked */
-struct list_head hardif_list;
-char bat_routing_algo[20] = "BATMAN IV";
-static struct hlist_head bat_algo_list;
+ * list traversals just rcu-locked
+ */
+struct list_head batadv_hardif_list;
+static int (*batadv_rx_handler[256])(struct sk_buff *,
+				     struct batadv_hard_iface *);
+char batadv_routing_algo[20] = "BATMAN_IV";
+static struct hlist_head batadv_algo_list;
+
+unsigned char batadv_broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
-unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+struct workqueue_struct *batadv_event_workqueue;
 
-struct workqueue_struct *bat_event_workqueue;
+static void batadv_recv_handler_init(void);
 
-static int __init batman_init(void)
+static int __init batadv_init(void)
 {
-	INIT_LIST_HEAD(&hardif_list);
-	INIT_HLIST_HEAD(&bat_algo_list);
+	INIT_LIST_HEAD(&batadv_hardif_list);
+	INIT_HLIST_HEAD(&batadv_algo_list);
 
-	bat_iv_init();
+	batadv_recv_handler_init();
+
+	batadv_iv_init();
 
 	/* the name should not be longer than 10 chars - see
-	 * http://lwn.net/Articles/23634/ */
-	bat_event_workqueue = create_singlethread_workqueue("bat_events");
+	 * http://lwn.net/Articles/23634/
+	 */
+	batadv_event_workqueue = create_singlethread_workqueue("bat_events");
 
-	if (!bat_event_workqueue)
+	if (!batadv_event_workqueue)
 		return -ENOMEM;
 
-	bat_socket_init();
-	debugfs_init();
+	batadv_socket_init();
+	batadv_debugfs_init();
 
-	register_netdevice_notifier(&hard_if_notifier);
+	register_netdevice_notifier(&batadv_hard_if_notifier);
 
 	pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
-		SOURCE_VERSION, COMPAT_VERSION);
+		BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION);
 
 	return 0;
 }
 
-static void __exit batman_exit(void)
+static void __exit batadv_exit(void)
 {
-	debugfs_destroy();
-	unregister_netdevice_notifier(&hard_if_notifier);
-	hardif_remove_interfaces();
+	batadv_debugfs_destroy();
+	unregister_netdevice_notifier(&batadv_hard_if_notifier);
+	batadv_hardif_remove_interfaces();
 
-	flush_workqueue(bat_event_workqueue);
-	destroy_workqueue(bat_event_workqueue);
-	bat_event_workqueue = NULL;
+	flush_workqueue(batadv_event_workqueue);
+	destroy_workqueue(batadv_event_workqueue);
+	batadv_event_workqueue = NULL;
 
 	rcu_barrier();
 }
 
-int mesh_init(struct net_device *soft_iface)
+int batadv_mesh_init(struct net_device *soft_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(soft_iface);
+	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
+	int ret;
 
 	spin_lock_init(&bat_priv->forw_bat_list_lock);
 	spin_lock_init(&bat_priv->forw_bcast_list_lock);
@@ -96,80 +104,85 @@ int mesh_init(struct net_device *soft_iface)
 	spin_lock_init(&bat_priv->gw_list_lock);
 	spin_lock_init(&bat_priv->vis_hash_lock);
 	spin_lock_init(&bat_priv->vis_list_lock);
-	spin_lock_init(&bat_priv->softif_neigh_lock);
-	spin_lock_init(&bat_priv->softif_neigh_vid_lock);
 
 	INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
 	INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
 	INIT_HLIST_HEAD(&bat_priv->gw_list);
-	INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
 	INIT_LIST_HEAD(&bat_priv->tt_changes_list);
 	INIT_LIST_HEAD(&bat_priv->tt_req_list);
 	INIT_LIST_HEAD(&bat_priv->tt_roam_list);
 
-	if (originator_init(bat_priv) < 1)
+	ret = batadv_originator_init(bat_priv);
+	if (ret < 0)
 		goto err;
 
-	if (tt_init(bat_priv) < 1)
+	ret = batadv_tt_init(bat_priv);
+	if (ret < 0)
 		goto err;
 
-	tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);
+	batadv_tt_local_add(soft_iface, soft_iface->dev_addr,
+			    BATADV_NULL_IFINDEX);
 
-	if (vis_init(bat_priv) < 1)
+	ret = batadv_vis_init(bat_priv);
+	if (ret < 0)
 		goto err;
 
-	atomic_set(&bat_priv->gw_reselect, 0);
-	atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
-	goto end;
+	ret = batadv_bla_init(bat_priv);
+	if (ret < 0)
+		goto err;
 
-err:
-	mesh_free(soft_iface);
-	return -1;
+	atomic_set(&bat_priv->gw_reselect, 0);
+	atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE);
 
-end:
 	return 0;
+
+err:
+	batadv_mesh_free(soft_iface);
+	return ret;
 }
 
-void mesh_free(struct net_device *soft_iface)
+void batadv_mesh_free(struct net_device *soft_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(soft_iface);
+	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 
-	atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
+	atomic_set(&bat_priv->mesh_state, BATADV_MESH_DEACTIVATING);
 
-	purge_outstanding_packets(bat_priv, NULL);
+	batadv_purge_outstanding_packets(bat_priv, NULL);
 
-	vis_quit(bat_priv);
+	batadv_vis_quit(bat_priv);
 
-	gw_node_purge(bat_priv);
-	originator_free(bat_priv);
+	batadv_gw_node_purge(bat_priv);
+	batadv_originator_free(bat_priv);
 
-	tt_free(bat_priv);
+	batadv_tt_free(bat_priv);
 
-	softif_neigh_purge(bat_priv);
+	batadv_bla_free(bat_priv);
 
-	atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
+	free_percpu(bat_priv->bat_counters);
+
+	atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
 }
 
-void inc_module_count(void)
+void batadv_inc_module_count(void)
 {
 	try_module_get(THIS_MODULE);
 }
 
-void dec_module_count(void)
+void batadv_dec_module_count(void)
 {
 	module_put(THIS_MODULE);
 }
 
-int is_my_mac(const uint8_t *addr)
+int batadv_is_my_mac(const uint8_t *addr)
 {
-	const struct hard_iface *hard_iface;
+	const struct batadv_hard_iface *hard_iface;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
-		if (hard_iface->if_status != IF_ACTIVE)
+	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
+		if (hard_iface->if_status != BATADV_IF_ACTIVE)
 			continue;
 
-		if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
+		if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) {
 			rcu_read_unlock();
 			return 1;
 		}
@@ -178,12 +191,129 @@ int is_my_mac(const uint8_t *addr)
 	return 0;
 }
 
-static struct bat_algo_ops *bat_algo_get(char *name)
+static int batadv_recv_unhandled_packet(struct sk_buff *skb,
+					struct batadv_hard_iface *recv_if)
+{
+	return NET_RX_DROP;
+}
+
+/* incoming packets with the batman ethertype received on any active hard
+ * interface
+ */
+int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
+			   struct packet_type *ptype,
+			   struct net_device *orig_dev)
 {
-	struct bat_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
+	struct batadv_priv *bat_priv;
+	struct batadv_ogm_packet *batadv_ogm_packet;
+	struct batadv_hard_iface *hard_iface;
+	uint8_t idx;
+	int ret;
+
+	hard_iface = container_of(ptype, struct batadv_hard_iface,
+				  batman_adv_ptype);
+	skb = skb_share_check(skb, GFP_ATOMIC);
+
+	/* skb was released by skb_share_check() */
+	if (!skb)
+		goto err_out;
+
+	/* packet should hold at least type and version */
+	if (unlikely(!pskb_may_pull(skb, 2)))
+		goto err_free;
+
+	/* expect a valid ethernet header here. */
+	if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb)))
+		goto err_free;
+
+	if (!hard_iface->soft_iface)
+		goto err_free;
+
+	bat_priv = netdev_priv(hard_iface->soft_iface);
+
+	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
+		goto err_free;
+
+	/* discard frames on not active interfaces */
+	if (hard_iface->if_status != BATADV_IF_ACTIVE)
+		goto err_free;
+
+	batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data;
+
+	if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) {
+		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+			   "Drop packet: incompatible batman version (%i)\n",
+			   batadv_ogm_packet->header.version);
+		goto err_free;
+	}
+
+	/* all receive handlers return whether they received or reused
+	 * the supplied skb. if not, we have to free the skb.
+	 */
+	idx = batadv_ogm_packet->header.packet_type;
+	ret = (*batadv_rx_handler[idx])(skb, hard_iface);
+
+	if (ret == NET_RX_DROP)
+		kfree_skb(skb);
+
+	/* return NET_RX_SUCCESS in any case as we
+	 * most probably dropped the packet for
+	 * routing-logical reasons.
+	 */
+	return NET_RX_SUCCESS;
+
+err_free:
+	kfree_skb(skb);
+err_out:
+	return NET_RX_DROP;
+}
+
+static void batadv_recv_handler_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++)
+		batadv_rx_handler[i] = batadv_recv_unhandled_packet;
+
+	/* batman icmp packet */
+	batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet;
+	/* unicast packet */
+	batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet;
+	/* fragmented unicast packet */
+	batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_ucast_frag_packet;
+	/* broadcast packet */
+	batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet;
+	/* vis packet */
+	batadv_rx_handler[BATADV_VIS] = batadv_recv_vis_packet;
+	/* Translation table query (request or response) */
+	batadv_rx_handler[BATADV_TT_QUERY] = batadv_recv_tt_query;
+	/* Roaming advertisement */
+	batadv_rx_handler[BATADV_ROAM_ADV] = batadv_recv_roam_adv;
+}
+
+int
+batadv_recv_handler_register(uint8_t packet_type,
+			     int (*recv_handler)(struct sk_buff *,
+						 struct batadv_hard_iface *))
+{
+	if (batadv_rx_handler[packet_type] != &batadv_recv_unhandled_packet)
+		return -EBUSY;
+
+	batadv_rx_handler[packet_type] = recv_handler;
+	return 0;
+}
+
+void batadv_recv_handler_unregister(uint8_t packet_type)
+{
+	batadv_rx_handler[packet_type] = batadv_recv_unhandled_packet;
+}
+
+static struct batadv_algo_ops *batadv_algo_get(char *name)
+{
+	struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
 	struct hlist_node *node;
 
-	hlist_for_each_entry(bat_algo_ops_tmp, node, &bat_algo_list, list) {
+	hlist_for_each_entry(bat_algo_ops_tmp, node, &batadv_algo_list, list) {
 		if (strcmp(bat_algo_ops_tmp->name, name) != 0)
 			continue;
 
@@ -194,44 +324,46 @@ static struct bat_algo_ops *bat_algo_get(char *name)
 	return bat_algo_ops;
 }
 
-int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
+int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops)
 {
-	struct bat_algo_ops *bat_algo_ops_tmp;
-	int ret = -1;
+	struct batadv_algo_ops *bat_algo_ops_tmp;
+	int ret;
 
-	bat_algo_ops_tmp = bat_algo_get(bat_algo_ops->name);
+	bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name);
 	if (bat_algo_ops_tmp) {
 		pr_info("Trying to register already registered routing algorithm: %s\n",
 			bat_algo_ops->name);
+		ret = -EEXIST;
 		goto out;
 	}
 
 	/* all algorithms must implement all ops (for now) */
-	if (!bat_algo_ops->bat_ogm_init ||
-	    !bat_algo_ops->bat_ogm_init_primary ||
-	    !bat_algo_ops->bat_ogm_update_mac ||
+	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_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);
+		ret = -EINVAL;
 		goto out;
 	}
 
 	INIT_HLIST_NODE(&bat_algo_ops->list);
-	hlist_add_head(&bat_algo_ops->list, &bat_algo_list);
+	hlist_add_head(&bat_algo_ops->list, &batadv_algo_list);
 	ret = 0;
 
 out:
 	return ret;
 }
 
-int bat_algo_select(struct bat_priv *bat_priv, char *name)
+int batadv_algo_select(struct batadv_priv *bat_priv, char *name)
 {
-	struct bat_algo_ops *bat_algo_ops;
-	int ret = -1;
+	struct batadv_algo_ops *bat_algo_ops;
+	int ret = -EINVAL;
 
-	bat_algo_ops = bat_algo_get(name);
+	bat_algo_ops = batadv_algo_get(name);
 	if (!bat_algo_ops)
 		goto out;
 
@@ -242,50 +374,56 @@ out:
 	return ret;
 }
 
-int bat_algo_seq_print_text(struct seq_file *seq, void *offset)
+int batadv_algo_seq_print_text(struct seq_file *seq, void *offset)
 {
-	struct bat_algo_ops *bat_algo_ops;
+	struct batadv_algo_ops *bat_algo_ops;
 	struct hlist_node *node;
 
 	seq_printf(seq, "Available routing algorithms:\n");
 
-	hlist_for_each_entry(bat_algo_ops, node, &bat_algo_list, list) {
+	hlist_for_each_entry(bat_algo_ops, node, &batadv_algo_list, list) {
 		seq_printf(seq, "%s\n", bat_algo_ops->name);
 	}
 
 	return 0;
 }
 
-static int param_set_ra(const char *val, const struct kernel_param *kp)
+static int batadv_param_set_ra(const char *val, const struct kernel_param *kp)
 {
-	struct bat_algo_ops *bat_algo_ops;
+	struct batadv_algo_ops *bat_algo_ops;
+	char *algo_name = (char *)val;
+	size_t name_len = strlen(algo_name);
+
+	if (algo_name[name_len - 1] == '\n')
+		algo_name[name_len - 1] = '\0';
 
-	bat_algo_ops = bat_algo_get((char *)val);
+	bat_algo_ops = batadv_algo_get(algo_name);
 	if (!bat_algo_ops) {
-		pr_err("Routing algorithm '%s' is not supported\n", val);
+		pr_err("Routing algorithm '%s' is not supported\n", algo_name);
 		return -EINVAL;
 	}
 
-	return param_set_copystring(val, kp);
+	return param_set_copystring(algo_name, kp);
 }
 
-static const struct kernel_param_ops param_ops_ra = {
-	.set = param_set_ra,
+static const struct kernel_param_ops batadv_param_ops_ra = {
+	.set = batadv_param_set_ra,
 	.get = param_get_string,
 };
 
-static struct kparam_string __param_string_ra = {
-	.maxlen = sizeof(bat_routing_algo),
-	.string = bat_routing_algo,
+static struct kparam_string batadv_param_string_ra = {
+	.maxlen = sizeof(batadv_routing_algo),
+	.string = batadv_routing_algo,
 };
 
-module_param_cb(routing_algo, &param_ops_ra, &__param_string_ra, 0644);
-module_init(batman_init);
-module_exit(batman_exit);
+module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra,
+		0644);
+module_init(batadv_init);
+module_exit(batadv_exit);
 
 MODULE_LICENSE("GPL");
 
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
-MODULE_VERSION(SOURCE_VERSION);
+MODULE_AUTHOR(BATADV_DRIVER_AUTHOR);
+MODULE_DESCRIPTION(BATADV_DRIVER_DESC);
+MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE);
+MODULE_VERSION(BATADV_SOURCE_VERSION);