blob: f9cc957289894ea8471f23ae06eb70d4ec6f52d9 [file] [log] [blame]
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001/*
Sven Eckelmann64afe352011-01-27 10:38:15 +01002 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00003 *
4 * Marek Lindner, Simon Wunderlich
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22#include "main.h"
23#include "soft-interface.h"
24#include "hard-interface.h"
25#include "routing.h"
26#include "send.h"
27#include "bat_debugfs.h"
28#include "translation-table.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000029#include "hash.h"
30#include "gateway_common.h"
31#include "gateway_client.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000032#include "bat_sysfs.h"
Antonio Quartulli43676ab52011-04-26 21:31:45 +020033#include "originator.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000034#include <linux/slab.h>
35#include <linux/ethtool.h>
36#include <linux/etherdevice.h>
37#include <linux/if_vlan.h>
38#include "unicast.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000039
40
41static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
42static void bat_get_drvinfo(struct net_device *dev,
43 struct ethtool_drvinfo *info);
44static u32 bat_get_msglevel(struct net_device *dev);
45static void bat_set_msglevel(struct net_device *dev, u32 value);
46static u32 bat_get_link(struct net_device *dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000047
48static const struct ethtool_ops bat_ethtool_ops = {
49 .get_settings = bat_get_settings,
50 .get_drvinfo = bat_get_drvinfo,
51 .get_msglevel = bat_get_msglevel,
52 .set_msglevel = bat_set_msglevel,
53 .get_link = bat_get_link,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000054};
55
56int my_skb_head_push(struct sk_buff *skb, unsigned int len)
57{
58 int result;
59
60 /**
61 * TODO: We must check if we can release all references to non-payload
62 * data using skb_header_release in our skbs to allow skb_cow_header to
63 * work optimally. This means that those skbs are not allowed to read
64 * or write any data which is before the current position of skb->data
65 * after that call and thus allow other skbs with the same data buffer
66 * to write freely in that area.
67 */
68 result = skb_cow_head(skb, len);
69 if (result < 0)
70 return result;
71
72 skb_push(skb, len);
73 return 0;
74}
75
Marek Lindner7d2b5542011-02-10 14:33:50 +000076static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
77{
78 if (atomic_dec_and_test(&softif_neigh->refcount))
Paul E. McKenney8e3572c2011-05-02 00:52:23 -070079 kfree_rcu(softif_neigh, rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000080}
81
Marek Lindner61906ae2011-04-21 15:52:17 +020082static void softif_neigh_vid_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000083{
Marek Lindner61906ae2011-04-21 15:52:17 +020084 struct softif_neigh_vid *softif_neigh_vid;
85 struct softif_neigh *softif_neigh;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000086 struct hlist_node *node, *node_tmp;
Marek Lindner61906ae2011-04-21 15:52:17 +020087 struct bat_priv *bat_priv;
Simon Wunderlichba85fac2011-04-17 20:34:27 +020088
Marek Lindner61906ae2011-04-21 15:52:17 +020089 softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu);
90 bat_priv = softif_neigh_vid->bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000091
92 spin_lock_bh(&bat_priv->softif_neigh_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000093 hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
Marek Lindner61906ae2011-04-21 15:52:17 +020094 &softif_neigh_vid->softif_neigh_list, list) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000095 hlist_del_rcu(&softif_neigh->list);
Marek Lindner7d2b5542011-02-10 14:33:50 +000096 softif_neigh_free_ref(softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000097 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000098 spin_unlock_bh(&bat_priv->softif_neigh_lock);
Simon Wunderlichba85fac2011-04-17 20:34:27 +020099
Marek Lindner61906ae2011-04-21 15:52:17 +0200100 kfree(softif_neigh_vid);
101}
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200102
Marek Lindner61906ae2011-04-21 15:52:17 +0200103static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid)
104{
105 if (atomic_dec_and_test(&softif_neigh_vid->refcount))
106 call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu);
107}
108
109static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv,
110 short vid)
111{
112 struct softif_neigh_vid *softif_neigh_vid;
113 struct hlist_node *node;
114
115 rcu_read_lock();
116 hlist_for_each_entry_rcu(softif_neigh_vid, node,
117 &bat_priv->softif_neigh_vids, list) {
118 if (softif_neigh_vid->vid != vid)
119 continue;
120
121 if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
122 continue;
123
124 goto out;
125 }
126
Sven Eckelmann704509b2011-05-14 23:14:54 +0200127 softif_neigh_vid = kzalloc(sizeof(*softif_neigh_vid), GFP_ATOMIC);
Marek Lindner61906ae2011-04-21 15:52:17 +0200128 if (!softif_neigh_vid)
129 goto out;
130
131 softif_neigh_vid->vid = vid;
132 softif_neigh_vid->bat_priv = bat_priv;
133
134 /* initialize with 2 - caller decrements counter by one */
135 atomic_set(&softif_neigh_vid->refcount, 2);
136 INIT_HLIST_HEAD(&softif_neigh_vid->softif_neigh_list);
137 INIT_HLIST_NODE(&softif_neigh_vid->list);
138 spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
139 hlist_add_head_rcu(&softif_neigh_vid->list,
140 &bat_priv->softif_neigh_vids);
141 spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
142
143out:
144 rcu_read_unlock();
145 return softif_neigh_vid;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000146}
147
148static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
Sven Eckelmann747e4222011-05-14 23:14:50 +0200149 const uint8_t *addr, short vid)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000150{
Marek Lindner61906ae2011-04-21 15:52:17 +0200151 struct softif_neigh_vid *softif_neigh_vid;
152 struct softif_neigh *softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000153 struct hlist_node *node;
154
Marek Lindner61906ae2011-04-21 15:52:17 +0200155 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
156 if (!softif_neigh_vid)
157 goto out;
158
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000159 rcu_read_lock();
160 hlist_for_each_entry_rcu(softif_neigh, node,
Marek Lindner61906ae2011-04-21 15:52:17 +0200161 &softif_neigh_vid->softif_neigh_list,
162 list) {
Marek Lindner39901e72011-02-18 12:28:08 +0000163 if (!compare_eth(softif_neigh->addr, addr))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000164 continue;
165
Marek Lindner7d2b5542011-02-10 14:33:50 +0000166 if (!atomic_inc_not_zero(&softif_neigh->refcount))
167 continue;
168
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000169 softif_neigh->last_seen = jiffies;
Marek Lindner61906ae2011-04-21 15:52:17 +0200170 goto unlock;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000171 }
172
Sven Eckelmann704509b2011-05-14 23:14:54 +0200173 softif_neigh = kzalloc(sizeof(*softif_neigh), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000174 if (!softif_neigh)
Marek Lindner61906ae2011-04-21 15:52:17 +0200175 goto unlock;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000176
177 memcpy(softif_neigh->addr, addr, ETH_ALEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000178 softif_neigh->last_seen = jiffies;
Marek Lindner7d2b5542011-02-10 14:33:50 +0000179 /* initialize with 2 - caller decrements counter by one */
180 atomic_set(&softif_neigh->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000181
182 INIT_HLIST_NODE(&softif_neigh->list);
183 spin_lock_bh(&bat_priv->softif_neigh_lock);
Marek Lindner61906ae2011-04-21 15:52:17 +0200184 hlist_add_head_rcu(&softif_neigh->list,
185 &softif_neigh_vid->softif_neigh_list);
186 spin_unlock_bh(&bat_priv->softif_neigh_lock);
187
188unlock:
189 rcu_read_unlock();
190out:
191 if (softif_neigh_vid)
192 softif_neigh_vid_free_ref(softif_neigh_vid);
193 return softif_neigh;
194}
195
196static struct softif_neigh *softif_neigh_get_selected(
197 struct softif_neigh_vid *softif_neigh_vid)
198{
199 struct softif_neigh *softif_neigh;
200
201 rcu_read_lock();
202 softif_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
203
204 if (softif_neigh && !atomic_inc_not_zero(&softif_neigh->refcount))
205 softif_neigh = NULL;
206
207 rcu_read_unlock();
208 return softif_neigh;
209}
210
211static struct softif_neigh *softif_neigh_vid_get_selected(
212 struct bat_priv *bat_priv,
213 short vid)
214{
215 struct softif_neigh_vid *softif_neigh_vid;
216 struct softif_neigh *softif_neigh = NULL;
217
218 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
219 if (!softif_neigh_vid)
220 goto out;
221
222 softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
223out:
224 if (softif_neigh_vid)
225 softif_neigh_vid_free_ref(softif_neigh_vid);
226 return softif_neigh;
227}
228
229static void softif_neigh_vid_select(struct bat_priv *bat_priv,
230 struct softif_neigh *new_neigh,
231 short vid)
232{
233 struct softif_neigh_vid *softif_neigh_vid;
234 struct softif_neigh *curr_neigh;
235
236 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
237 if (!softif_neigh_vid)
238 goto out;
239
240 spin_lock_bh(&bat_priv->softif_neigh_lock);
241
242 if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
243 new_neigh = NULL;
244
Sven Eckelmann728cbc62011-05-15 00:50:21 +0200245 curr_neigh = rcu_dereference_protected(softif_neigh_vid->softif_neigh,
246 1);
Marek Lindner61906ae2011-04-21 15:52:17 +0200247 rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh);
248
249 if ((curr_neigh) && (!new_neigh))
250 bat_dbg(DBG_ROUTES, bat_priv,
251 "Removing mesh exit point on vid: %d (prev: %pM).\n",
252 vid, curr_neigh->addr);
253 else if ((curr_neigh) && (new_neigh))
254 bat_dbg(DBG_ROUTES, bat_priv,
255 "Changing mesh exit point on vid: %d from %pM "
256 "to %pM.\n", vid, curr_neigh->addr, new_neigh->addr);
257 else if ((!curr_neigh) && (new_neigh))
258 bat_dbg(DBG_ROUTES, bat_priv,
259 "Setting mesh exit point on vid: %d to %pM.\n",
260 vid, new_neigh->addr);
261
262 if (curr_neigh)
263 softif_neigh_free_ref(curr_neigh);
264
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000265 spin_unlock_bh(&bat_priv->softif_neigh_lock);
266
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000267out:
Marek Lindner61906ae2011-04-21 15:52:17 +0200268 if (softif_neigh_vid)
269 softif_neigh_vid_free_ref(softif_neigh_vid);
270}
271
272static void softif_neigh_vid_deselect(struct bat_priv *bat_priv,
273 struct softif_neigh_vid *softif_neigh_vid)
274{
275 struct softif_neigh *curr_neigh;
276 struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp;
277 struct hard_iface *primary_if = NULL;
278 struct hlist_node *node;
279
280 primary_if = primary_if_get_selected(bat_priv);
281 if (!primary_if)
282 goto out;
283
284 /* find new softif_neigh immediately to avoid temporary loops */
285 rcu_read_lock();
286 curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
287
288 hlist_for_each_entry_rcu(softif_neigh_tmp, node,
289 &softif_neigh_vid->softif_neigh_list,
290 list) {
291 if (softif_neigh_tmp == curr_neigh)
292 continue;
293
294 /* we got a neighbor but its mac is 'bigger' than ours */
295 if (memcmp(primary_if->net_dev->dev_addr,
296 softif_neigh_tmp->addr, ETH_ALEN) < 0)
297 continue;
298
299 if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount))
300 continue;
301
302 softif_neigh = softif_neigh_tmp;
303 goto unlock;
304 }
305
306unlock:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000307 rcu_read_unlock();
Marek Lindner61906ae2011-04-21 15:52:17 +0200308out:
309 softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid);
310
311 if (primary_if)
312 hardif_free_ref(primary_if);
313 if (softif_neigh)
314 softif_neigh_free_ref(softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000315}
316
317int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
318{
319 struct net_device *net_dev = (struct net_device *)seq->private;
320 struct bat_priv *bat_priv = netdev_priv(net_dev);
Marek Lindner61906ae2011-04-21 15:52:17 +0200321 struct softif_neigh_vid *softif_neigh_vid;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000322 struct softif_neigh *softif_neigh;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200323 struct hard_iface *primary_if;
Marek Lindner61906ae2011-04-21 15:52:17 +0200324 struct hlist_node *node, *node_tmp;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200325 struct softif_neigh *curr_softif_neigh;
Marek Lindner61906ae2011-04-21 15:52:17 +0200326 int ret = 0, last_seen_secs, last_seen_msecs;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000327
Marek Lindner32ae9b22011-04-20 15:40:58 +0200328 primary_if = primary_if_get_selected(bat_priv);
329 if (!primary_if) {
330 ret = seq_printf(seq, "BATMAN mesh %s disabled - "
331 "please specify interfaces to enable it\n",
332 net_dev->name);
333 goto out;
334 }
335
336 if (primary_if->if_status != IF_ACTIVE) {
337 ret = seq_printf(seq, "BATMAN mesh %s "
338 "disabled - primary interface not active\n",
339 net_dev->name);
340 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000341 }
342
343 seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
344
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000345 rcu_read_lock();
Marek Lindner61906ae2011-04-21 15:52:17 +0200346 hlist_for_each_entry_rcu(softif_neigh_vid, node,
347 &bat_priv->softif_neigh_vids, list) {
348 seq_printf(seq, " %-15s %s on vid: %d\n",
349 "Originator", "last-seen", softif_neigh_vid->vid);
350
351 curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
352
353 hlist_for_each_entry_rcu(softif_neigh, node_tmp,
354 &softif_neigh_vid->softif_neigh_list,
355 list) {
356 last_seen_secs = jiffies_to_msecs(jiffies -
357 softif_neigh->last_seen) / 1000;
358 last_seen_msecs = jiffies_to_msecs(jiffies -
359 softif_neigh->last_seen) % 1000;
360 seq_printf(seq, "%s %pM %3i.%03is\n",
361 curr_softif_neigh == softif_neigh
362 ? "=>" : " ", softif_neigh->addr,
363 last_seen_secs, last_seen_msecs);
364 }
365
366 if (curr_softif_neigh)
367 softif_neigh_free_ref(curr_softif_neigh);
368
369 seq_printf(seq, "\n");
370 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000371 rcu_read_unlock();
372
Marek Lindner32ae9b22011-04-20 15:40:58 +0200373out:
374 if (primary_if)
375 hardif_free_ref(primary_if);
376 return ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000377}
378
Marek Lindner61906ae2011-04-21 15:52:17 +0200379void softif_neigh_purge(struct bat_priv *bat_priv)
380{
381 struct softif_neigh *softif_neigh, *curr_softif_neigh;
382 struct softif_neigh_vid *softif_neigh_vid;
383 struct hlist_node *node, *node_tmp, *node_tmp2;
Sven Eckelmannb4e17052011-06-15 09:41:37 +0200384 int do_deselect;
Marek Lindner61906ae2011-04-21 15:52:17 +0200385
386 rcu_read_lock();
387 hlist_for_each_entry_rcu(softif_neigh_vid, node,
388 &bat_priv->softif_neigh_vids, list) {
389 if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
390 continue;
391
392 curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
393 do_deselect = 0;
394
395 spin_lock_bh(&bat_priv->softif_neigh_lock);
396 hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2,
397 &softif_neigh_vid->softif_neigh_list,
398 list) {
399 if ((!time_after(jiffies, softif_neigh->last_seen +
400 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
401 (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
402 continue;
403
404 if (curr_softif_neigh == softif_neigh) {
405 bat_dbg(DBG_ROUTES, bat_priv,
406 "Current mesh exit point on vid: %d "
407 "'%pM' vanished.\n",
408 softif_neigh_vid->vid,
409 softif_neigh->addr);
410 do_deselect = 1;
411 }
412
413 hlist_del_rcu(&softif_neigh->list);
414 softif_neigh_free_ref(softif_neigh);
415 }
416 spin_unlock_bh(&bat_priv->softif_neigh_lock);
417
418 /* soft_neigh_vid_deselect() needs to acquire the
419 * softif_neigh_lock */
420 if (do_deselect)
421 softif_neigh_vid_deselect(bat_priv, softif_neigh_vid);
422
423 if (curr_softif_neigh)
424 softif_neigh_free_ref(curr_softif_neigh);
425
426 softif_neigh_vid_free_ref(softif_neigh_vid);
427 }
428 rcu_read_unlock();
429
430 spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
431 hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp,
432 &bat_priv->softif_neigh_vids, list) {
433 if (!hlist_empty(&softif_neigh_vid->softif_neigh_list))
434 continue;
435
436 hlist_del_rcu(&softif_neigh_vid->list);
437 softif_neigh_vid_free_ref(softif_neigh_vid);
438 }
439 spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
440
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000441}
442
443static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
444 short vid)
445{
446 struct bat_priv *bat_priv = netdev_priv(dev);
447 struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200448 struct batman_ogm_packet *batman_ogm_packet;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200449 struct softif_neigh *softif_neigh = NULL;
450 struct hard_iface *primary_if = NULL;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200451 struct softif_neigh *curr_softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000452
453 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200454 batman_ogm_packet = (struct batman_ogm_packet *)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000455 (skb->data + ETH_HLEN + VLAN_HLEN);
456 else
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200457 batman_ogm_packet = (struct batman_ogm_packet *)
458 (skb->data + ETH_HLEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000459
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200460 if (batman_ogm_packet->version != COMPAT_VERSION)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200461 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000462
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200463 if (batman_ogm_packet->packet_type != BAT_OGM)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200464 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000465
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200466 if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
Marek Lindner32ae9b22011-04-20 15:40:58 +0200467 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000468
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200469 if (is_my_mac(batman_ogm_packet->orig))
Marek Lindner32ae9b22011-04-20 15:40:58 +0200470 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000471
Marek Lindnerb6da4bf2011-07-29 17:31:50 +0200472 softif_neigh = softif_neigh_get(bat_priv, batman_ogm_packet->orig, vid);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000473 if (!softif_neigh)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200474 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000475
Marek Lindner61906ae2011-04-21 15:52:17 +0200476 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200477 if (curr_softif_neigh == softif_neigh)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000478 goto out;
479
Marek Lindner32ae9b22011-04-20 15:40:58 +0200480 primary_if = primary_if_get_selected(bat_priv);
481 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000482 goto out;
483
484 /* we got a neighbor but its mac is 'bigger' than ours */
Marek Lindner32ae9b22011-04-20 15:40:58 +0200485 if (memcmp(primary_if->net_dev->dev_addr,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000486 softif_neigh->addr, ETH_ALEN) < 0)
487 goto out;
488
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000489 /* close own batX device and use softif_neigh as exit node */
Marek Lindner61906ae2011-04-21 15:52:17 +0200490 if (!curr_softif_neigh) {
491 softif_neigh_vid_select(bat_priv, softif_neigh, vid);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200492 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000493 }
494
Marek Lindner61906ae2011-04-21 15:52:17 +0200495 /* switch to new 'smallest neighbor' */
496 if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0)
497 softif_neigh_vid_select(bat_priv, softif_neigh, vid);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000498
499out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000500 kfree_skb(skb);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200501 if (softif_neigh)
502 softif_neigh_free_ref(softif_neigh);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200503 if (curr_softif_neigh)
504 softif_neigh_free_ref(curr_softif_neigh);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200505 if (primary_if)
506 hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000507 return;
508}
509
510static int interface_open(struct net_device *dev)
511{
512 netif_start_queue(dev);
513 return 0;
514}
515
516static int interface_release(struct net_device *dev)
517{
518 netif_stop_queue(dev);
519 return 0;
520}
521
522static struct net_device_stats *interface_stats(struct net_device *dev)
523{
524 struct bat_priv *bat_priv = netdev_priv(dev);
525 return &bat_priv->stats;
526}
527
528static int interface_set_mac_addr(struct net_device *dev, void *p)
529{
530 struct bat_priv *bat_priv = netdev_priv(dev);
531 struct sockaddr *addr = p;
532
533 if (!is_valid_ether_addr(addr->sa_data))
534 return -EADDRNOTAVAIL;
535
Antonio Quartulli015758d2011-07-09 17:52:13 +0200536 /* only modify transtable if it has been initialized before */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000537 if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200538 tt_local_remove(bat_priv, dev->dev_addr,
Antonio Quartullicc47f662011-04-27 14:27:57 +0200539 "mac address changed", false);
Antonio Quartullibc279082011-07-07 15:35:35 +0200540 tt_local_add(dev, addr->sa_data, NULL_IFINDEX);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000541 }
542
543 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
544 return 0;
545}
546
547static int interface_change_mtu(struct net_device *dev, int new_mtu)
548{
549 /* check ranges */
550 if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
551 return -EINVAL;
552
553 dev->mtu = new_mtu;
554
555 return 0;
556}
557
Sven Eckelmanndb69ecf2011-06-15 15:17:21 +0200558static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000559{
560 struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
561 struct bat_priv *bat_priv = netdev_priv(soft_iface);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200562 struct hard_iface *primary_if = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000563 struct bcast_packet *bcast_packet;
564 struct vlan_ethhdr *vhdr;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200565 struct softif_neigh *curr_softif_neigh = NULL;
Antonio Quartulli43676ab52011-04-26 21:31:45 +0200566 struct orig_node *orig_node = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000567 int data_len = skb->len, ret;
568 short vid = -1;
Antonio Quartulli8b267b312011-09-21 16:06:42 +0200569 bool do_bcast;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000570
571 if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
572 goto dropped;
573
574 soft_iface->trans_start = jiffies;
575
576 switch (ntohs(ethhdr->h_proto)) {
577 case ETH_P_8021Q:
578 vhdr = (struct vlan_ethhdr *)skb->data;
579 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
580
581 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
582 break;
583
584 /* fall through */
585 case ETH_P_BATMAN:
586 softif_batman_recv(skb, soft_iface, vid);
587 goto end;
588 }
589
590 /**
591 * if we have a another chosen mesh exit node in range
592 * it will transport the packets to the mesh
593 */
Marek Lindner61906ae2011-04-21 15:52:17 +0200594 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
595 if (curr_softif_neigh)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000596 goto dropped;
597
Antonio Quartullia73105b2011-04-27 14:27:44 +0200598 /* Register the client MAC in the transtable */
Antonio Quartullibc279082011-07-07 15:35:35 +0200599 tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000600
Antonio Quartulli3d393e42011-07-07 15:35:37 +0200601 orig_node = transtable_search(bat_priv, ethhdr->h_source,
602 ethhdr->h_dest);
Antonio Quartulli8b267b312011-09-21 16:06:42 +0200603 do_bcast = is_multicast_ether_addr(ethhdr->h_dest);
David S. Miller88c51002011-10-07 13:38:43 -0400604 if (do_bcast || (orig_node && orig_node->gw_flags)) {
Antonio Quartulli43676ab52011-04-26 21:31:45 +0200605 ret = gw_is_target(bat_priv, skb, orig_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000606
607 if (ret < 0)
608 goto dropped;
609
Antonio Quartulli8b267b312011-09-21 16:06:42 +0200610 if (ret)
611 do_bcast = false;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000612 }
613
614 /* ethernet packet should be broadcasted */
615 if (do_bcast) {
Marek Lindner32ae9b22011-04-20 15:40:58 +0200616 primary_if = primary_if_get_selected(bat_priv);
617 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000618 goto dropped;
619
Sven Eckelmann704509b2011-05-14 23:14:54 +0200620 if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000621 goto dropped;
622
623 bcast_packet = (struct bcast_packet *)skb->data;
624 bcast_packet->version = COMPAT_VERSION;
625 bcast_packet->ttl = TTL;
626
627 /* batman packet type: broadcast */
628 bcast_packet->packet_type = BAT_BCAST;
629
630 /* hw address of first interface is the orig mac because only
631 * this mac is known throughout the mesh */
632 memcpy(bcast_packet->orig,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200633 primary_if->net_dev->dev_addr, ETH_ALEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000634
635 /* set broadcast sequence number */
636 bcast_packet->seqno =
637 htonl(atomic_inc_return(&bat_priv->bcast_seqno));
638
Antonio Quartulli86985292011-06-25 19:09:12 +0200639 add_bcast_packet_to_list(bat_priv, skb, 1);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000640
641 /* a copy is stored in the bcast list, therefore removing
642 * the original skb. */
643 kfree_skb(skb);
644
645 /* unicast packet */
646 } else {
647 ret = unicast_send_skb(skb, bat_priv);
648 if (ret != 0)
649 goto dropped_freed;
650 }
651
652 bat_priv->stats.tx_packets++;
653 bat_priv->stats.tx_bytes += data_len;
654 goto end;
655
656dropped:
657 kfree_skb(skb);
658dropped_freed:
659 bat_priv->stats.tx_dropped++;
660end:
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200661 if (curr_softif_neigh)
662 softif_neigh_free_ref(curr_softif_neigh);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200663 if (primary_if)
664 hardif_free_ref(primary_if);
Antonio Quartulli43676ab52011-04-26 21:31:45 +0200665 if (orig_node)
666 orig_node_free_ref(orig_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000667 return NETDEV_TX_OK;
668}
669
670void interface_rx(struct net_device *soft_iface,
Marek Lindnere6c10f42011-02-18 12:33:20 +0000671 struct sk_buff *skb, struct hard_iface *recv_if,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000672 int hdr_size)
673{
674 struct bat_priv *bat_priv = netdev_priv(soft_iface);
675 struct unicast_packet *unicast_packet;
676 struct ethhdr *ethhdr;
677 struct vlan_ethhdr *vhdr;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200678 struct softif_neigh *curr_softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000679 short vid = -1;
680 int ret;
681
682 /* check if enough space is available for pulling, and pull */
683 if (!pskb_may_pull(skb, hdr_size))
684 goto dropped;
685
686 skb_pull_rcsum(skb, hdr_size);
687 skb_reset_mac_header(skb);
688
689 ethhdr = (struct ethhdr *)skb_mac_header(skb);
690
691 switch (ntohs(ethhdr->h_proto)) {
692 case ETH_P_8021Q:
693 vhdr = (struct vlan_ethhdr *)skb->data;
694 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
695
696 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
697 break;
698
699 /* fall through */
700 case ETH_P_BATMAN:
701 goto dropped;
702 }
703
704 /**
705 * if we have a another chosen mesh exit node in range
706 * it will transport the packets to the non-mesh network
707 */
Marek Lindner61906ae2011-04-21 15:52:17 +0200708 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
709 if (curr_softif_neigh) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000710 skb_push(skb, hdr_size);
711 unicast_packet = (struct unicast_packet *)skb->data;
712
713 if ((unicast_packet->packet_type != BAT_UNICAST) &&
714 (unicast_packet->packet_type != BAT_UNICAST_FRAG))
715 goto dropped;
716
717 skb_reset_mac_header(skb);
718
719 memcpy(unicast_packet->dest,
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200720 curr_softif_neigh->addr, ETH_ALEN);
Linus Lüssing7cefb142011-03-02 17:39:31 +0000721 ret = route_unicast_packet(skb, recv_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000722 if (ret == NET_RX_DROP)
723 goto dropped;
724
725 goto out;
726 }
727
728 /* skb->dev & skb->pkt_type are set here */
729 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
730 goto dropped;
731 skb->protocol = eth_type_trans(skb, soft_iface);
732
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300733 /* should not be necessary anymore as we use skb_pull_rcsum()
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000734 * TODO: please verify this and remove this TODO
735 * -- Dec 21st 2009, Simon Wunderlich */
736
737/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
738
739 bat_priv->stats.rx_packets++;
740 bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
741
742 soft_iface->last_rx = jiffies;
743
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200744 if (is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))
745 goto dropped;
746
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000747 netif_rx(skb);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200748 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000749
750dropped:
751 kfree_skb(skb);
752out:
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200753 if (curr_softif_neigh)
754 softif_neigh_free_ref(curr_softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000755 return;
756}
757
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000758static const struct net_device_ops bat_netdev_ops = {
759 .ndo_open = interface_open,
760 .ndo_stop = interface_release,
761 .ndo_get_stats = interface_stats,
762 .ndo_set_mac_address = interface_set_mac_addr,
763 .ndo_change_mtu = interface_change_mtu,
764 .ndo_start_xmit = interface_tx,
765 .ndo_validate_addr = eth_validate_addr
766};
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000767
768static void interface_setup(struct net_device *dev)
769{
770 struct bat_priv *priv = netdev_priv(dev);
771 char dev_addr[ETH_ALEN];
772
773 ether_setup(dev);
774
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000775 dev->netdev_ops = &bat_netdev_ops;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000776 dev->destructor = free_netdev;
Andrew Lunnaf20b712011-04-17 20:39:07 +0200777 dev->tx_queue_len = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000778
779 /**
780 * can't call min_mtu, because the needed variables
781 * have not been initialized yet
782 */
783 dev->mtu = ETH_DATA_LEN;
Sven Eckelmann6e215fd2011-05-08 12:45:45 +0200784 /* reserve more space in the skbuff for our header */
785 dev->hard_header_len = BAT_HEADER_LEN;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000786
787 /* generate random address */
788 random_ether_addr(dev_addr);
789 memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
790
791 SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
792
Sven Eckelmann704509b2011-05-14 23:14:54 +0200793 memset(priv, 0, sizeof(*priv));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000794}
795
Sven Eckelmann747e4222011-05-14 23:14:50 +0200796struct net_device *softif_create(const char *name)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000797{
798 struct net_device *soft_iface;
799 struct bat_priv *bat_priv;
800 int ret;
801
Sven Eckelmann704509b2011-05-14 23:14:54 +0200802 soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000803
Joe Perches320f4222011-08-29 14:17:24 -0700804 if (!soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000805 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000806
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200807 ret = register_netdevice(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000808 if (ret < 0) {
809 pr_err("Unable to register the batman interface '%s': %i\n",
810 name, ret);
811 goto free_soft_iface;
812 }
813
814 bat_priv = netdev_priv(soft_iface);
815
816 atomic_set(&bat_priv->aggregated_ogms, 1);
817 atomic_set(&bat_priv->bonding, 0);
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200818 atomic_set(&bat_priv->ap_isolation, 0);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000819 atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
820 atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
821 atomic_set(&bat_priv->gw_sel_class, 20);
822 atomic_set(&bat_priv->gw_bandwidth, 41);
823 atomic_set(&bat_priv->orig_interval, 1000);
824 atomic_set(&bat_priv->hop_penalty, 10);
825 atomic_set(&bat_priv->log_level, 0);
826 atomic_set(&bat_priv->fragmentation, 1);
827 atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
828 atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
829
830 atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
831 atomic_set(&bat_priv->bcast_seqno, 1);
Antonio Quartullia73105b2011-04-27 14:27:44 +0200832 atomic_set(&bat_priv->ttvn, 0);
833 atomic_set(&bat_priv->tt_local_changes, 0);
834 atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
835
836 bat_priv->tt_buff = NULL;
837 bat_priv->tt_buff_len = 0;
Antonio Quartullicc47f662011-04-27 14:27:57 +0200838 bat_priv->tt_poss_change = false;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000839
840 bat_priv->primary_if = NULL;
841 bat_priv->num_ifaces = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000842
843 ret = sysfs_add_meshif(soft_iface);
844 if (ret < 0)
845 goto unreg_soft_iface;
846
847 ret = debugfs_add_meshif(soft_iface);
848 if (ret < 0)
849 goto unreg_sysfs;
850
851 ret = mesh_init(soft_iface);
852 if (ret < 0)
853 goto unreg_debugfs;
854
855 return soft_iface;
856
857unreg_debugfs:
858 debugfs_del_meshif(soft_iface);
859unreg_sysfs:
860 sysfs_del_meshif(soft_iface);
861unreg_soft_iface:
862 unregister_netdev(soft_iface);
863 return NULL;
864
865free_soft_iface:
866 free_netdev(soft_iface);
867out:
868 return NULL;
869}
870
871void softif_destroy(struct net_device *soft_iface)
872{
873 debugfs_del_meshif(soft_iface);
874 sysfs_del_meshif(soft_iface);
875 mesh_free(soft_iface);
876 unregister_netdevice(soft_iface);
877}
878
Sven Eckelmann747e4222011-05-14 23:14:50 +0200879int softif_is_valid(const struct net_device *net_dev)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000880{
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000881 if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
882 return 1;
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000883
884 return 0;
885}
886
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000887/* ethtool */
888static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
889{
890 cmd->supported = 0;
891 cmd->advertising = 0;
David Decotigny70739492011-04-27 18:32:40 +0000892 ethtool_cmd_speed_set(cmd, SPEED_10);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000893 cmd->duplex = DUPLEX_FULL;
894 cmd->port = PORT_TP;
895 cmd->phy_address = 0;
896 cmd->transceiver = XCVR_INTERNAL;
897 cmd->autoneg = AUTONEG_DISABLE;
898 cmd->maxtxpkt = 0;
899 cmd->maxrxpkt = 0;
900
901 return 0;
902}
903
904static void bat_get_drvinfo(struct net_device *dev,
905 struct ethtool_drvinfo *info)
906{
907 strcpy(info->driver, "B.A.T.M.A.N. advanced");
908 strcpy(info->version, SOURCE_VERSION);
909 strcpy(info->fw_version, "N/A");
910 strcpy(info->bus_info, "batman");
911}
912
913static u32 bat_get_msglevel(struct net_device *dev)
914{
915 return -EOPNOTSUPP;
916}
917
918static void bat_set_msglevel(struct net_device *dev, u32 value)
919{
920}
921
922static u32 bat_get_link(struct net_device *dev)
923{
924 return 1;
925}