2010-12-13 12:19:28 +01:00
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/*
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2012-01-01 00:41:38 +01:00
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* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
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2010-12-13 12:19:28 +01:00
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*
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*/
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#include "main.h"
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#include "bat_sysfs.h"
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#include "bat_debugfs.h"
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#include "routing.h"
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#include "send.h"
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#include "originator.h"
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#include "soft-interface.h"
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#include "icmp_socket.h"
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#include "translation-table.h"
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#include "hard-interface.h"
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#include "gateway_client.h"
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2012-01-22 20:00:19 +01:00
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#include "bridge_loop_avoidance.h"
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2010-12-13 12:19:28 +01:00
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#include "vis.h"
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#include "hash.h"
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2011-11-28 10:40:17 +01:00
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#include "bat_algo.h"
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2010-12-13 12:19:28 +01:00
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2011-05-03 11:51:38 +02:00
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/* List manipulations on hardif_list have to be rtnl_lock()'ed,
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* list traversals just rcu-locked */
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2011-02-18 13:33:19 +01:00
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struct list_head hardif_list;
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2012-03-01 08:35:17 +01:00
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static int (*recv_packet_handler[256])(struct sk_buff *, struct hard_iface *);
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2012-04-18 11:15:57 +02:00
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char bat_routing_algo[20] = "BATMAN_IV";
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2011-11-28 10:40:17 +01:00
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static struct hlist_head bat_algo_list;
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2010-12-13 12:19:28 +01:00
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unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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struct workqueue_struct *bat_event_workqueue;
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2012-03-01 08:35:17 +01:00
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static void recv_handler_init(void);
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2010-12-13 12:19:28 +01:00
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static int __init batman_init(void)
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{
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2011-02-18 13:33:19 +01:00
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INIT_LIST_HEAD(&hardif_list);
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2011-11-28 10:40:17 +01:00
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INIT_HLIST_HEAD(&bat_algo_list);
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2012-03-01 08:35:17 +01:00
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recv_handler_init();
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2012-05-12 02:09:22 +02:00
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batadv_iv_init();
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2010-12-13 12:19:28 +01:00
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/* the name should not be longer than 10 chars - see
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* http://lwn.net/Articles/23634/ */
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bat_event_workqueue = create_singlethread_workqueue("bat_events");
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if (!bat_event_workqueue)
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return -ENOMEM;
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bat_socket_init();
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debugfs_init();
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register_netdevice_notifier(&hard_if_notifier);
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2012-03-07 09:07:45 +01:00
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pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
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SOURCE_VERSION, COMPAT_VERSION);
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2010-12-13 12:19:28 +01:00
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return 0;
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}
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static void __exit batman_exit(void)
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{
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debugfs_destroy();
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unregister_netdevice_notifier(&hard_if_notifier);
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hardif_remove_interfaces();
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flush_workqueue(bat_event_workqueue);
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destroy_workqueue(bat_event_workqueue);
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bat_event_workqueue = NULL;
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rcu_barrier();
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}
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int mesh_init(struct net_device *soft_iface)
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{
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struct bat_priv *bat_priv = netdev_priv(soft_iface);
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2012-05-05 13:27:28 +02:00
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int ret;
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2010-12-13 12:19:28 +01:00
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spin_lock_init(&bat_priv->forw_bat_list_lock);
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spin_lock_init(&bat_priv->forw_bcast_list_lock);
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2011-04-27 14:27:44 +02:00
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spin_lock_init(&bat_priv->tt_changes_list_lock);
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spin_lock_init(&bat_priv->tt_req_list_lock);
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2011-04-27 14:27:57 +02:00
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spin_lock_init(&bat_priv->tt_roam_list_lock);
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2011-04-27 14:27:44 +02:00
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spin_lock_init(&bat_priv->tt_buff_lock);
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2010-12-13 12:19:28 +01:00
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spin_lock_init(&bat_priv->gw_list_lock);
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spin_lock_init(&bat_priv->vis_hash_lock);
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spin_lock_init(&bat_priv->vis_list_lock);
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INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
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INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
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INIT_HLIST_HEAD(&bat_priv->gw_list);
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2011-04-27 14:27:44 +02:00
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INIT_LIST_HEAD(&bat_priv->tt_changes_list);
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INIT_LIST_HEAD(&bat_priv->tt_req_list);
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2011-04-27 14:27:57 +02:00
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INIT_LIST_HEAD(&bat_priv->tt_roam_list);
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2010-12-13 12:19:28 +01:00
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2012-05-05 13:27:28 +02:00
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ret = originator_init(bat_priv);
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if (ret < 0)
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2010-12-13 12:19:28 +01:00
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goto err;
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2012-05-05 13:27:28 +02:00
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ret = tt_init(bat_priv);
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if (ret < 0)
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2010-12-13 12:19:28 +01:00
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goto err;
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2011-07-07 15:35:35 +02:00
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tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);
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2010-12-13 12:19:28 +01:00
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2012-05-05 13:27:28 +02:00
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ret = vis_init(bat_priv);
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if (ret < 0)
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2010-12-13 12:19:28 +01:00
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goto err;
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2012-05-05 13:27:28 +02:00
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ret = bla_init(bat_priv);
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if (ret < 0)
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2012-01-22 20:00:19 +01:00
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goto err;
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2011-04-27 00:22:00 +02:00
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atomic_set(&bat_priv->gw_reselect, 0);
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2010-12-13 12:19:28 +01:00
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atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
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2012-05-05 13:27:28 +02:00
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return 0;
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2010-12-13 12:19:28 +01:00
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err:
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mesh_free(soft_iface);
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2012-05-05 13:27:28 +02:00
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return ret;
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2010-12-13 12:19:28 +01:00
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}
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void mesh_free(struct net_device *soft_iface)
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{
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struct bat_priv *bat_priv = netdev_priv(soft_iface);
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atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
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purge_outstanding_packets(bat_priv, NULL);
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vis_quit(bat_priv);
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gw_node_purge(bat_priv);
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originator_free(bat_priv);
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2011-04-27 14:27:44 +02:00
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tt_free(bat_priv);
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2010-12-13 12:19:28 +01:00
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2012-01-22 20:00:19 +01:00
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bla_free(bat_priv);
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2012-04-20 17:02:45 +02:00
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free_percpu(bat_priv->bat_counters);
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2010-12-13 12:19:28 +01:00
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atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
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}
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void inc_module_count(void)
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{
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try_module_get(THIS_MODULE);
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}
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void dec_module_count(void)
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{
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module_put(THIS_MODULE);
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}
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2011-05-14 23:14:50 +02:00
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int is_my_mac(const uint8_t *addr)
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2010-12-13 12:19:28 +01:00
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{
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2011-05-14 23:14:50 +02:00
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const struct hard_iface *hard_iface;
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2010-12-13 12:19:28 +01:00
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rcu_read_lock();
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2011-02-18 13:33:20 +01:00
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list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
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if (hard_iface->if_status != IF_ACTIVE)
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2010-12-13 12:19:28 +01:00
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continue;
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2011-02-18 13:33:20 +01:00
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if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
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2010-12-13 12:19:28 +01:00
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rcu_read_unlock();
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return 1;
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}
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}
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rcu_read_unlock();
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return 0;
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}
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2012-03-01 08:35:17 +01:00
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static int recv_unhandled_packet(struct sk_buff *skb,
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struct hard_iface *recv_if)
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{
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return NET_RX_DROP;
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}
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/* incoming packets with the batman ethertype received on any active hard
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* interface
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*/
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int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *ptype, struct net_device *orig_dev)
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{
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struct bat_priv *bat_priv;
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struct batman_ogm_packet *batman_ogm_packet;
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struct hard_iface *hard_iface;
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uint8_t idx;
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int ret;
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hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype);
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skb = skb_share_check(skb, GFP_ATOMIC);
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/* skb was released by skb_share_check() */
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if (!skb)
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goto err_out;
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/* packet should hold at least type and version */
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if (unlikely(!pskb_may_pull(skb, 2)))
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goto err_free;
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/* expect a valid ethernet header here. */
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if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb)))
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goto err_free;
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if (!hard_iface->soft_iface)
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goto err_free;
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bat_priv = netdev_priv(hard_iface->soft_iface);
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if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
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goto err_free;
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/* discard frames on not active interfaces */
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if (hard_iface->if_status != IF_ACTIVE)
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goto err_free;
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batman_ogm_packet = (struct batman_ogm_packet *)skb->data;
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if (batman_ogm_packet->header.version != COMPAT_VERSION) {
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bat_dbg(DBG_BATMAN, bat_priv,
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"Drop packet: incompatible batman version (%i)\n",
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batman_ogm_packet->header.version);
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goto err_free;
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}
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/* all receive handlers return whether they received or reused
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* the supplied skb. if not, we have to free the skb.
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*/
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idx = batman_ogm_packet->header.packet_type;
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ret = (*recv_packet_handler[idx])(skb, hard_iface);
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if (ret == NET_RX_DROP)
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kfree_skb(skb);
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/* return NET_RX_SUCCESS in any case as we
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* most probably dropped the packet for
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* routing-logical reasons.
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*/
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return NET_RX_SUCCESS;
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err_free:
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kfree_skb(skb);
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err_out:
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return NET_RX_DROP;
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}
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static void recv_handler_init(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(recv_packet_handler); i++)
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recv_packet_handler[i] = recv_unhandled_packet;
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/* batman icmp packet */
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recv_packet_handler[BAT_ICMP] = recv_icmp_packet;
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/* unicast packet */
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recv_packet_handler[BAT_UNICAST] = recv_unicast_packet;
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/* fragmented unicast packet */
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recv_packet_handler[BAT_UNICAST_FRAG] = recv_ucast_frag_packet;
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/* broadcast packet */
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recv_packet_handler[BAT_BCAST] = recv_bcast_packet;
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/* vis packet */
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recv_packet_handler[BAT_VIS] = recv_vis_packet;
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/* Translation table query (request or response) */
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recv_packet_handler[BAT_TT_QUERY] = recv_tt_query;
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/* Roaming advertisement */
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recv_packet_handler[BAT_ROAM_ADV] = recv_roam_adv;
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}
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int recv_handler_register(uint8_t packet_type,
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int (*recv_handler)(struct sk_buff *,
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struct hard_iface *))
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{
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if (recv_packet_handler[packet_type] != &recv_unhandled_packet)
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return -EBUSY;
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recv_packet_handler[packet_type] = recv_handler;
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return 0;
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}
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void recv_handler_unregister(uint8_t packet_type)
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{
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recv_packet_handler[packet_type] = recv_unhandled_packet;
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}
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2011-11-28 10:40:17 +01:00
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static struct bat_algo_ops *bat_algo_get(char *name)
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{
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struct bat_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
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struct hlist_node *node;
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hlist_for_each_entry(bat_algo_ops_tmp, node, &bat_algo_list, list) {
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if (strcmp(bat_algo_ops_tmp->name, name) != 0)
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continue;
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bat_algo_ops = bat_algo_ops_tmp;
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break;
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}
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return bat_algo_ops;
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}
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int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
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{
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struct bat_algo_ops *bat_algo_ops_tmp;
|
2012-05-05 13:27:28 +02:00
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int ret;
|
2011-11-28 10:40:17 +01:00
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bat_algo_ops_tmp = bat_algo_get(bat_algo_ops->name);
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if (bat_algo_ops_tmp) {
|
2012-03-07 09:07:45 +01:00
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|
pr_info("Trying to register already registered routing algorithm: %s\n",
|
|
|
|
bat_algo_ops->name);
|
2012-05-05 13:27:28 +02:00
|
|
|
ret = -EEXIST;
|
2011-11-28 10:40:17 +01:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2011-11-28 14:31:55 +01:00
|
|
|
/* all algorithms must implement all ops (for now) */
|
2012-02-07 10:20:45 +01:00
|
|
|
if (!bat_algo_ops->bat_iface_enable ||
|
2012-02-07 10:20:47 +01:00
|
|
|
!bat_algo_ops->bat_iface_disable ||
|
2012-03-10 23:17:50 +01:00
|
|
|
!bat_algo_ops->bat_iface_update_mac ||
|
2012-02-07 10:20:49 +01:00
|
|
|
!bat_algo_ops->bat_primary_iface_set ||
|
2011-11-28 14:31:55 +01:00
|
|
|
!bat_algo_ops->bat_ogm_schedule ||
|
2012-03-04 09:56:25 +01:00
|
|
|
!bat_algo_ops->bat_ogm_emit) {
|
2011-11-28 14:31:55 +01:00
|
|
|
pr_info("Routing algo '%s' does not implement required ops\n",
|
|
|
|
bat_algo_ops->name);
|
2012-05-05 13:27:28 +02:00
|
|
|
ret = -EINVAL;
|
2011-11-28 14:31:55 +01:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2011-11-28 10:40:17 +01:00
|
|
|
INIT_HLIST_NODE(&bat_algo_ops->list);
|
|
|
|
hlist_add_head(&bat_algo_ops->list, &bat_algo_list);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bat_algo_select(struct bat_priv *bat_priv, char *name)
|
|
|
|
{
|
|
|
|
struct bat_algo_ops *bat_algo_ops;
|
2012-05-05 13:27:28 +02:00
|
|
|
int ret = -EINVAL;
|
2011-11-28 10:40:17 +01:00
|
|
|
|
|
|
|
bat_algo_ops = bat_algo_get(name);
|
|
|
|
if (!bat_algo_ops)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
bat_priv->bat_algo_ops = bat_algo_ops;
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bat_algo_seq_print_text(struct seq_file *seq, void *offset)
|
|
|
|
{
|
|
|
|
struct bat_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) {
|
|
|
|
seq_printf(seq, "%s\n", bat_algo_ops->name);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-10 12:45:53 +01:00
|
|
|
static int param_set_ra(const char *val, const struct kernel_param *kp)
|
|
|
|
{
|
|
|
|
struct bat_algo_ops *bat_algo_ops;
|
2012-04-18 11:16:39 +02:00
|
|
|
char *algo_name = (char *)val;
|
|
|
|
size_t name_len = strlen(algo_name);
|
2011-12-10 12:45:53 +01:00
|
|
|
|
2012-04-18 11:16:39 +02:00
|
|
|
if (algo_name[name_len - 1] == '\n')
|
|
|
|
algo_name[name_len - 1] = '\0';
|
|
|
|
|
|
|
|
bat_algo_ops = bat_algo_get(algo_name);
|
2011-12-10 12:45:53 +01:00
|
|
|
if (!bat_algo_ops) {
|
2012-04-18 11:16:39 +02:00
|
|
|
pr_err("Routing algorithm '%s' is not supported\n", algo_name);
|
2011-12-10 12:45:53 +01:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2012-04-18 11:16:39 +02:00
|
|
|
return param_set_copystring(algo_name, kp);
|
2011-12-10 12:45:53 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct kernel_param_ops param_ops_ra = {
|
|
|
|
.set = param_set_ra,
|
|
|
|
.get = param_get_string,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct kparam_string __param_string_ra = {
|
|
|
|
.maxlen = sizeof(bat_routing_algo),
|
|
|
|
.string = bat_routing_algo,
|
|
|
|
};
|
|
|
|
|
|
|
|
module_param_cb(routing_algo, ¶m_ops_ra, &__param_string_ra, 0644);
|
2010-12-13 12:19:28 +01:00
|
|
|
module_init(batman_init);
|
|
|
|
module_exit(batman_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
|
|
MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
|
|
|
|
MODULE_VERSION(SOURCE_VERSION);
|