/*

   * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:

   *
   * Marek Lindner, Simon Wunderlich
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of version 2 of the GNU General Public
   * License as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * 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 "routing.h"
  #include "send.h"
  #include "originator.h"
  #include "soft-interface.h"
  #include "icmp_socket.h"
  #include "translation-table.h"
  #include "hard-interface.h"
  #include "gateway_client.h"

  #include "vis.h"
  #include "hash.h"

  
  /* List manipulations on hardif_list have to be rtnl_lock()'ed,
   * list traversals just rcu-locked */

  struct list_head hardif_list;

  
  unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  
  struct workqueue_struct *bat_event_workqueue;
  
  static int __init batman_init(void)
  {

  	INIT_LIST_HEAD(&hardif_list);

  
  	/* the name should not be longer than 10 chars - see
  	 * http://lwn.net/Articles/23634/ */
  	bat_event_workqueue = create_singlethread_workqueue("bat_events");
  
  	if (!bat_event_workqueue)
  		return -ENOMEM;
  
  	bat_socket_init();
  	debugfs_init();
  
  	register_netdevice_notifier(&hard_if_notifier);

  	pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) "
  		"loaded
  ", SOURCE_VERSION, COMPAT_VERSION);

  
  	return 0;
  }
  
  static void __exit batman_exit(void)
  {
  	debugfs_destroy();
  	unregister_netdevice_notifier(&hard_if_notifier);
  	hardif_remove_interfaces();
  
  	flush_workqueue(bat_event_workqueue);
  	destroy_workqueue(bat_event_workqueue);
  	bat_event_workqueue = NULL;
  
  	rcu_barrier();
  }
  
  int mesh_init(struct net_device *soft_iface)
  {
  	struct bat_priv *bat_priv = netdev_priv(soft_iface);

  	spin_lock_init(&bat_priv->forw_bat_list_lock);
  	spin_lock_init(&bat_priv->forw_bcast_list_lock);

  	spin_lock_init(&bat_priv->tt_changes_list_lock);
  	spin_lock_init(&bat_priv->tt_req_list_lock);

  	spin_lock_init(&bat_priv->tt_roam_list_lock);

  	spin_lock_init(&bat_priv->tt_buff_lock);

  	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)
  		goto err;

  	if (tt_init(bat_priv) < 1)

  		goto err;

  	tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);

  
  	if (vis_init(bat_priv) < 1)
  		goto err;

  	atomic_set(&bat_priv->gw_reselect, 0);

  	atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
  	goto end;
  
  err:

  	mesh_free(soft_iface);
  	return -1;
  
  end:
  	return 0;
  }
  
  void mesh_free(struct net_device *soft_iface)
  {
  	struct bat_priv *bat_priv = netdev_priv(soft_iface);
  
  	atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
  
  	purge_outstanding_packets(bat_priv, NULL);
  
  	vis_quit(bat_priv);
  
  	gw_node_purge(bat_priv);
  	originator_free(bat_priv);

  	tt_free(bat_priv);

  
  	softif_neigh_purge(bat_priv);
  
  	atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
  }
  
  void inc_module_count(void)
  {
  	try_module_get(THIS_MODULE);
  }
  
  void dec_module_count(void)
  {
  	module_put(THIS_MODULE);
  }

  int is_my_mac(const uint8_t *addr)

  {

  	const struct hard_iface *hard_iface;

  
  	rcu_read_lock();

  	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
  		if (hard_iface->if_status != IF_ACTIVE)

  			continue;

  		if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {

  			rcu_read_unlock();
  			return 1;
  		}
  	}
  	rcu_read_unlock();
  	return 0;
  
  }
  
  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);