292 lines
6.8 KiB
C
292 lines
6.8 KiB
C
/*
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* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
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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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#include "vis.h"
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#include "hash.h"
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#include "bat_algo.h"
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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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struct list_head hardif_list;
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char bat_routing_algo[20] = "BATMAN IV";
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static struct hlist_head bat_algo_list;
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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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static int __init batman_init(void)
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{
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INIT_LIST_HEAD(&hardif_list);
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INIT_HLIST_HEAD(&bat_algo_list);
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bat_iv_init();
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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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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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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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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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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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spin_lock_init(&bat_priv->tt_roam_list_lock);
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spin_lock_init(&bat_priv->tt_buff_lock);
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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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spin_lock_init(&bat_priv->softif_neigh_lock);
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spin_lock_init(&bat_priv->softif_neigh_vid_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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INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
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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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INIT_LIST_HEAD(&bat_priv->tt_roam_list);
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if (originator_init(bat_priv) < 1)
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goto err;
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if (tt_init(bat_priv) < 1)
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goto err;
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tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);
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if (vis_init(bat_priv) < 1)
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goto err;
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atomic_set(&bat_priv->gw_reselect, 0);
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atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
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goto end;
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err:
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mesh_free(soft_iface);
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return -1;
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end:
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return 0;
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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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tt_free(bat_priv);
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softif_neigh_purge(bat_priv);
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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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int is_my_mac(const uint8_t *addr)
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{
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const struct hard_iface *hard_iface;
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rcu_read_lock();
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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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continue;
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if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
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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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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;
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int ret = -1;
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bat_algo_ops_tmp = bat_algo_get(bat_algo_ops->name);
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if (bat_algo_ops_tmp) {
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pr_info("Trying to register already registered routing algorithm: %s\n",
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bat_algo_ops->name);
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goto out;
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}
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/* all algorithms must implement all ops (for now) */
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if (!bat_algo_ops->bat_ogm_init ||
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!bat_algo_ops->bat_ogm_init_primary ||
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!bat_algo_ops->bat_ogm_update_mac ||
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!bat_algo_ops->bat_ogm_schedule ||
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!bat_algo_ops->bat_ogm_emit ||
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!bat_algo_ops->bat_ogm_receive) {
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pr_info("Routing algo '%s' does not implement required ops\n",
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bat_algo_ops->name);
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goto out;
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}
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INIT_HLIST_NODE(&bat_algo_ops->list);
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hlist_add_head(&bat_algo_ops->list, &bat_algo_list);
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ret = 0;
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out:
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return ret;
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}
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int bat_algo_select(struct bat_priv *bat_priv, char *name)
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{
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struct bat_algo_ops *bat_algo_ops;
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int ret = -1;
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bat_algo_ops = bat_algo_get(name);
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if (!bat_algo_ops)
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goto out;
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bat_priv->bat_algo_ops = bat_algo_ops;
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ret = 0;
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out:
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return ret;
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}
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int bat_algo_seq_print_text(struct seq_file *seq, void *offset)
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{
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struct bat_algo_ops *bat_algo_ops;
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struct hlist_node *node;
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seq_printf(seq, "Available routing algorithms:\n");
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hlist_for_each_entry(bat_algo_ops, node, &bat_algo_list, list) {
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seq_printf(seq, "%s\n", bat_algo_ops->name);
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}
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return 0;
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}
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static int param_set_ra(const char *val, const struct kernel_param *kp)
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{
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struct bat_algo_ops *bat_algo_ops;
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bat_algo_ops = bat_algo_get((char *)val);
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if (!bat_algo_ops) {
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pr_err("Routing algorithm '%s' is not supported\n", val);
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return -EINVAL;
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}
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return param_set_copystring(val, kp);
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}
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static const struct kernel_param_ops param_ops_ra = {
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.set = param_set_ra,
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.get = param_get_string,
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};
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static struct kparam_string __param_string_ra = {
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.maxlen = sizeof(bat_routing_algo),
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.string = bat_routing_algo,
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};
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module_param_cb(routing_algo, ¶m_ops_ra, &__param_string_ra, 0644);
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module_init(batman_init);
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module_exit(batman_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
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MODULE_VERSION(SOURCE_VERSION);
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