blob: bb89bfc5dda618d766072639e2dd500940f797dc [file] [log] [blame]
/*
* Copyright (C) 2007-2009 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 "proc.h"
#include "log.h"
#include "routing.h"
#include "send.h"
#include "soft-interface.h"
#include "device.h"
#include "translation-table.h"
#include "hard-interface.h"
#include "types.h"
#include "vis.h"
#include "hash.h"
#include "compat.h"
struct list_head if_list;
struct hlist_head forw_bat_list;
struct hlist_head forw_bcast_list;
struct hashtable_t *orig_hash;
DEFINE_SPINLOCK(orig_hash_lock);
DEFINE_SPINLOCK(forw_bat_list_lock);
DEFINE_SPINLOCK(forw_bcast_list_lock);
atomic_t originator_interval;
atomic_t vis_interval;
atomic_t aggregation_enabled;
int16_t num_hna;
int16_t num_ifs;
struct net_device *soft_device;
static struct task_struct *kthread_task;
unsigned char broadcastAddr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
atomic_t module_state;
struct workqueue_struct *bat_event_workqueue;
int init_module(void)
{
int retval;
INIT_LIST_HEAD(&if_list);
INIT_HLIST_HEAD(&forw_bat_list);
INIT_HLIST_HEAD(&forw_bcast_list);
atomic_set(&module_state, MODULE_INACTIVE);
atomic_set(&originator_interval, 1000);
atomic_set(&vis_interval, 1000);/* TODO: raise this later, this is only
* for debugging now. */
atomic_set(&aggregation_enabled, 1);
/* 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;
retval = setup_procfs();
if (retval < 0)
return retval;
bat_device_init();
/* initialize layer 2 interface */
soft_device = alloc_netdev(sizeof(struct bat_priv) , "bat%d",
interface_setup);
if (!soft_device) {
debug_log(LOG_TYPE_CRIT, "Unable to allocate the batman interface\n");
goto end;
}
retval = register_netdev(soft_device);
if (retval < 0) {
debug_log(LOG_TYPE_CRIT, "Unable to register the batman interface: %i\n", retval);
goto free_soft_device;
}
register_netdevice_notifier(&hard_if_notifier);
debug_log(LOG_TYPE_CRIT, "B.A.T.M.A.N. advanced %s%s (compatibility version %i) loaded \n",
SOURCE_VERSION, REVISION_VERSION_STR, COMPAT_VERSION);
return 0;
free_soft_device:
free_netdev(soft_device);
soft_device = NULL;
end:
return -ENOMEM;
}
void cleanup_module(void)
{
shutdown_module();
if (soft_device) {
unregister_netdev(soft_device);
soft_device = NULL;
}
unregister_netdevice_notifier(&hard_if_notifier);
cleanup_procfs();
destroy_workqueue(bat_event_workqueue);
bat_event_workqueue = NULL;
}
/* activates the module, creates bat device, starts timer ... */
void activate_module(void)
{
if (originator_init() < 1)
goto err;
if (hna_local_init() < 1)
goto err;
if (hna_global_init() < 1)
goto err;
hna_local_add(soft_device->dev_addr);
if (bat_device_setup() < 1)
goto end;
if (vis_init() < 1)
goto err;
/* (re)start kernel thread for packet processing */
if (!kthread_task) {
kthread_task = kthread_run(packet_recv_thread, NULL, "batman-adv");
if (IS_ERR(kthread_task)) {
debug_log(LOG_TYPE_CRIT, "Unable to start packet receive thread\n");
kthread_task = NULL;
}
}
update_min_mtu();
atomic_set(&module_state, MODULE_ACTIVE);
goto end;
err:
debug_log(LOG_TYPE_CRIT, "Unable to allocate memory for mesh information structures: out of mem ?\n");
shutdown_module();
end:
return;
}
/* shuts down the whole module.*/
void shutdown_module(void)
{
atomic_set(&module_state, MODULE_DEACTIVATING);
purge_outstanding_packets();
flush_workqueue(bat_event_workqueue);
vis_quit();
/* deactivate kernel thread for packet processing (if running) */
if (kthread_task) {
atomic_set(&exit_cond, 1);
wake_up_interruptible(&thread_wait);
kthread_stop(kthread_task);
kthread_task = NULL;
}
originator_free();
hna_local_free();
hna_global_free();
synchronize_net();
bat_device_destroy();
hardif_remove_interfaces();
synchronize_rcu();
atomic_set(&module_state, MODULE_INACTIVE);
}
void inc_module_count(void)
{
try_module_get(THIS_MODULE);
}
void dec_module_count(void)
{
module_put(THIS_MODULE);
}
int addr_to_string(char *buff, uint8_t *addr)
{
return sprintf(buff, "%02x:%02x:%02x:%02x:%02x:%02x",
addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
}
/* returns 1 if they are the same originator */
int compare_orig(void *data1, void *data2)
{
return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
}
/* hashfunction to choose an entry in a hash table of given size */
/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
int choose_orig(void *data, int32_t size)
{
unsigned char *key = data;
uint32_t hash = 0;
size_t i;
for (i = 0; i < 6; i++) {
hash += key[i];
hash += (hash << 10);
hash ^= (hash >> 6);
}
hash += (hash << 3);
hash ^= (hash >> 11);
hash += (hash << 15);
return hash % size;
}
int is_my_mac(uint8_t *addr)
{
struct batman_if *batman_if;
rcu_read_lock();
list_for_each_entry_rcu(batman_if, &if_list, list) {
if ((batman_if->net_dev) &&
(compare_orig(batman_if->net_dev->dev_addr, addr))) {
rcu_read_unlock();
return 1;
}
}
rcu_read_unlock();
return 0;
}
int is_bcast(uint8_t *addr)
{
return (addr[0] == (uint8_t)0xff) && (addr[1] == (uint8_t)0xff);
}
int is_mcast(uint8_t *addr)
{
return *addr & 0x01;
}
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
#ifdef REVISION_VERSION
MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
#else
MODULE_VERSION(SOURCE_VERSION);
#endif