1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 #include "originator.h"
26 #include "soft-interface.h"
27 #include "icmp_socket.h"
28 #include "translation-table.h"
29 #include "hard-interface.h"
30 #include "gateway_client.h"
31 #include "bridge_loop_avoidance.h"
37 /* List manipulations on hardif_list have to be rtnl_lock()'ed,
38 * list traversals just rcu-locked
40 struct list_head batadv_hardif_list
;
41 static int (*batadv_rx_handler
[256])(struct sk_buff
*,
42 struct batadv_hard_iface
*);
43 char batadv_routing_algo
[20] = "BATMAN_IV";
44 static struct hlist_head batadv_algo_list
;
46 unsigned char batadv_broadcast_addr
[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
48 struct workqueue_struct
*batadv_event_workqueue
;
50 static void batadv_recv_handler_init(void);
52 static int __init
batadv_init(void)
54 INIT_LIST_HEAD(&batadv_hardif_list
);
55 INIT_HLIST_HEAD(&batadv_algo_list
);
57 batadv_recv_handler_init();
61 batadv_event_workqueue
= create_singlethread_workqueue("bat_events");
63 if (!batadv_event_workqueue
)
67 batadv_debugfs_init();
69 register_netdevice_notifier(&batadv_hard_if_notifier
);
71 pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
72 BATADV_SOURCE_VERSION
, BATADV_COMPAT_VERSION
);
77 static void __exit
batadv_exit(void)
79 batadv_debugfs_destroy();
80 unregister_netdevice_notifier(&batadv_hard_if_notifier
);
81 batadv_hardif_remove_interfaces();
83 flush_workqueue(batadv_event_workqueue
);
84 destroy_workqueue(batadv_event_workqueue
);
85 batadv_event_workqueue
= NULL
;
90 int batadv_mesh_init(struct net_device
*soft_iface
)
92 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
95 spin_lock_init(&bat_priv
->forw_bat_list_lock
);
96 spin_lock_init(&bat_priv
->forw_bcast_list_lock
);
97 spin_lock_init(&bat_priv
->tt
.changes_list_lock
);
98 spin_lock_init(&bat_priv
->tt
.req_list_lock
);
99 spin_lock_init(&bat_priv
->tt
.roam_list_lock
);
100 spin_lock_init(&bat_priv
->tt
.last_changeset_lock
);
101 spin_lock_init(&bat_priv
->gw
.list_lock
);
102 spin_lock_init(&bat_priv
->vis
.hash_lock
);
103 spin_lock_init(&bat_priv
->vis
.list_lock
);
105 INIT_HLIST_HEAD(&bat_priv
->forw_bat_list
);
106 INIT_HLIST_HEAD(&bat_priv
->forw_bcast_list
);
107 INIT_HLIST_HEAD(&bat_priv
->gw
.list
);
108 INIT_LIST_HEAD(&bat_priv
->tt
.changes_list
);
109 INIT_LIST_HEAD(&bat_priv
->tt
.req_list
);
110 INIT_LIST_HEAD(&bat_priv
->tt
.roam_list
);
112 ret
= batadv_originator_init(bat_priv
);
116 ret
= batadv_tt_init(bat_priv
);
120 batadv_tt_local_add(soft_iface
, soft_iface
->dev_addr
,
121 BATADV_NULL_IFINDEX
);
123 ret
= batadv_vis_init(bat_priv
);
127 ret
= batadv_bla_init(bat_priv
);
131 atomic_set(&bat_priv
->gw
.reselect
, 0);
132 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_ACTIVE
);
137 batadv_mesh_free(soft_iface
);
141 void batadv_mesh_free(struct net_device
*soft_iface
)
143 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
145 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_DEACTIVATING
);
147 batadv_purge_outstanding_packets(bat_priv
, NULL
);
149 batadv_vis_quit(bat_priv
);
151 batadv_gw_node_purge(bat_priv
);
152 batadv_originator_free(bat_priv
);
154 batadv_tt_free(bat_priv
);
156 batadv_bla_free(bat_priv
);
158 free_percpu(bat_priv
->bat_counters
);
160 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
163 void batadv_inc_module_count(void)
165 try_module_get(THIS_MODULE
);
168 void batadv_dec_module_count(void)
170 module_put(THIS_MODULE
);
173 int batadv_is_my_mac(const uint8_t *addr
)
175 const struct batadv_hard_iface
*hard_iface
;
178 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
179 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
182 if (batadv_compare_eth(hard_iface
->net_dev
->dev_addr
, addr
)) {
191 static int batadv_recv_unhandled_packet(struct sk_buff
*skb
,
192 struct batadv_hard_iface
*recv_if
)
197 /* incoming packets with the batman ethertype received on any active hard
200 int batadv_batman_skb_recv(struct sk_buff
*skb
, struct net_device
*dev
,
201 struct packet_type
*ptype
,
202 struct net_device
*orig_dev
)
204 struct batadv_priv
*bat_priv
;
205 struct batadv_ogm_packet
*batadv_ogm_packet
;
206 struct batadv_hard_iface
*hard_iface
;
210 hard_iface
= container_of(ptype
, struct batadv_hard_iface
,
212 skb
= skb_share_check(skb
, GFP_ATOMIC
);
214 /* skb was released by skb_share_check() */
218 /* packet should hold at least type and version */
219 if (unlikely(!pskb_may_pull(skb
, 2)))
222 /* expect a valid ethernet header here. */
223 if (unlikely(skb
->mac_len
!= ETH_HLEN
|| !skb_mac_header(skb
)))
226 if (!hard_iface
->soft_iface
)
229 bat_priv
= netdev_priv(hard_iface
->soft_iface
);
231 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
234 /* discard frames on not active interfaces */
235 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
238 batadv_ogm_packet
= (struct batadv_ogm_packet
*)skb
->data
;
240 if (batadv_ogm_packet
->header
.version
!= BATADV_COMPAT_VERSION
) {
241 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
242 "Drop packet: incompatible batman version (%i)\n",
243 batadv_ogm_packet
->header
.version
);
247 /* all receive handlers return whether they received or reused
248 * the supplied skb. if not, we have to free the skb.
250 idx
= batadv_ogm_packet
->header
.packet_type
;
251 ret
= (*batadv_rx_handler
[idx
])(skb
, hard_iface
);
253 if (ret
== NET_RX_DROP
)
256 /* return NET_RX_SUCCESS in any case as we
257 * most probably dropped the packet for
258 * routing-logical reasons.
260 return NET_RX_SUCCESS
;
268 static void batadv_recv_handler_init(void)
272 for (i
= 0; i
< ARRAY_SIZE(batadv_rx_handler
); i
++)
273 batadv_rx_handler
[i
] = batadv_recv_unhandled_packet
;
275 /* batman icmp packet */
276 batadv_rx_handler
[BATADV_ICMP
] = batadv_recv_icmp_packet
;
278 batadv_rx_handler
[BATADV_UNICAST
] = batadv_recv_unicast_packet
;
279 /* fragmented unicast packet */
280 batadv_rx_handler
[BATADV_UNICAST_FRAG
] = batadv_recv_ucast_frag_packet
;
281 /* broadcast packet */
282 batadv_rx_handler
[BATADV_BCAST
] = batadv_recv_bcast_packet
;
284 batadv_rx_handler
[BATADV_VIS
] = batadv_recv_vis_packet
;
285 /* Translation table query (request or response) */
286 batadv_rx_handler
[BATADV_TT_QUERY
] = batadv_recv_tt_query
;
287 /* Roaming advertisement */
288 batadv_rx_handler
[BATADV_ROAM_ADV
] = batadv_recv_roam_adv
;
292 batadv_recv_handler_register(uint8_t packet_type
,
293 int (*recv_handler
)(struct sk_buff
*,
294 struct batadv_hard_iface
*))
296 if (batadv_rx_handler
[packet_type
] != &batadv_recv_unhandled_packet
)
299 batadv_rx_handler
[packet_type
] = recv_handler
;
303 void batadv_recv_handler_unregister(uint8_t packet_type
)
305 batadv_rx_handler
[packet_type
] = batadv_recv_unhandled_packet
;
308 static struct batadv_algo_ops
*batadv_algo_get(char *name
)
310 struct batadv_algo_ops
*bat_algo_ops
= NULL
, *bat_algo_ops_tmp
;
311 struct hlist_node
*node
;
313 hlist_for_each_entry(bat_algo_ops_tmp
, node
, &batadv_algo_list
, list
) {
314 if (strcmp(bat_algo_ops_tmp
->name
, name
) != 0)
317 bat_algo_ops
= bat_algo_ops_tmp
;
324 int batadv_algo_register(struct batadv_algo_ops
*bat_algo_ops
)
326 struct batadv_algo_ops
*bat_algo_ops_tmp
;
329 bat_algo_ops_tmp
= batadv_algo_get(bat_algo_ops
->name
);
330 if (bat_algo_ops_tmp
) {
331 pr_info("Trying to register already registered routing algorithm: %s\n",
337 /* all algorithms must implement all ops (for now) */
338 if (!bat_algo_ops
->bat_iface_enable
||
339 !bat_algo_ops
->bat_iface_disable
||
340 !bat_algo_ops
->bat_iface_update_mac
||
341 !bat_algo_ops
->bat_primary_iface_set
||
342 !bat_algo_ops
->bat_ogm_schedule
||
343 !bat_algo_ops
->bat_ogm_emit
) {
344 pr_info("Routing algo '%s' does not implement required ops\n",
350 INIT_HLIST_NODE(&bat_algo_ops
->list
);
351 hlist_add_head(&bat_algo_ops
->list
, &batadv_algo_list
);
358 int batadv_algo_select(struct batadv_priv
*bat_priv
, char *name
)
360 struct batadv_algo_ops
*bat_algo_ops
;
363 bat_algo_ops
= batadv_algo_get(name
);
367 bat_priv
->bat_algo_ops
= bat_algo_ops
;
374 int batadv_algo_seq_print_text(struct seq_file
*seq
, void *offset
)
376 struct batadv_algo_ops
*bat_algo_ops
;
377 struct hlist_node
*node
;
379 seq_printf(seq
, "Available routing algorithms:\n");
381 hlist_for_each_entry(bat_algo_ops
, node
, &batadv_algo_list
, list
) {
382 seq_printf(seq
, "%s\n", bat_algo_ops
->name
);
388 static int batadv_param_set_ra(const char *val
, const struct kernel_param
*kp
)
390 struct batadv_algo_ops
*bat_algo_ops
;
391 char *algo_name
= (char *)val
;
392 size_t name_len
= strlen(algo_name
);
394 if (algo_name
[name_len
- 1] == '\n')
395 algo_name
[name_len
- 1] = '\0';
397 bat_algo_ops
= batadv_algo_get(algo_name
);
399 pr_err("Routing algorithm '%s' is not supported\n", algo_name
);
403 return param_set_copystring(algo_name
, kp
);
406 static const struct kernel_param_ops batadv_param_ops_ra
= {
407 .set
= batadv_param_set_ra
,
408 .get
= param_get_string
,
411 static struct kparam_string batadv_param_string_ra
= {
412 .maxlen
= sizeof(batadv_routing_algo
),
413 .string
= batadv_routing_algo
,
416 module_param_cb(routing_algo
, &batadv_param_ops_ra
, &batadv_param_string_ra
,
418 module_init(batadv_init
);
419 module_exit(batadv_exit
);
421 MODULE_LICENSE("GPL");
423 MODULE_AUTHOR(BATADV_DRIVER_AUTHOR
);
424 MODULE_DESCRIPTION(BATADV_DRIVER_DESC
);
425 MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE
);
426 MODULE_VERSION(BATADV_SOURCE_VERSION
);