blob: 3371ece680a2071db9c00979be904f79b962f9fd [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"
33#include <linux/slab.h>
34#include <linux/ethtool.h>
35#include <linux/etherdevice.h>
36#include <linux/if_vlan.h>
37#include "unicast.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000038
39
40static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
41static void bat_get_drvinfo(struct net_device *dev,
42 struct ethtool_drvinfo *info);
43static u32 bat_get_msglevel(struct net_device *dev);
44static void bat_set_msglevel(struct net_device *dev, u32 value);
45static u32 bat_get_link(struct net_device *dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000046
47static const struct ethtool_ops bat_ethtool_ops = {
48 .get_settings = bat_get_settings,
49 .get_drvinfo = bat_get_drvinfo,
50 .get_msglevel = bat_get_msglevel,
51 .set_msglevel = bat_set_msglevel,
52 .get_link = bat_get_link,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000053};
54
55int my_skb_head_push(struct sk_buff *skb, unsigned int len)
56{
57 int result;
58
59 /**
60 * TODO: We must check if we can release all references to non-payload
61 * data using skb_header_release in our skbs to allow skb_cow_header to
62 * work optimally. This means that those skbs are not allowed to read
63 * or write any data which is before the current position of skb->data
64 * after that call and thus allow other skbs with the same data buffer
65 * to write freely in that area.
66 */
67 result = skb_cow_head(skb, len);
68 if (result < 0)
69 return result;
70
71 skb_push(skb, len);
72 return 0;
73}
74
Marek Lindner7d2b5542011-02-10 14:33:50 +000075static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
76{
77 if (atomic_dec_and_test(&softif_neigh->refcount))
Paul E. McKenney8e3572c2011-05-02 00:52:23 -070078 kfree_rcu(softif_neigh, rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000079}
80
Marek Lindner61906ae2011-04-21 15:52:17 +020081static void softif_neigh_vid_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000082{
Marek Lindner61906ae2011-04-21 15:52:17 +020083 struct softif_neigh_vid *softif_neigh_vid;
84 struct softif_neigh *softif_neigh;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000085 struct hlist_node *node, *node_tmp;
Marek Lindner61906ae2011-04-21 15:52:17 +020086 struct bat_priv *bat_priv;
Simon Wunderlichba85fac2011-04-17 20:34:27 +020087
Marek Lindner61906ae2011-04-21 15:52:17 +020088 softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu);
89 bat_priv = softif_neigh_vid->bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000090
91 spin_lock_bh(&bat_priv->softif_neigh_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000092 hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
Marek Lindner61906ae2011-04-21 15:52:17 +020093 &softif_neigh_vid->softif_neigh_list, list) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000094 hlist_del_rcu(&softif_neigh->list);
Marek Lindner7d2b5542011-02-10 14:33:50 +000095 softif_neigh_free_ref(softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000096 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000097 spin_unlock_bh(&bat_priv->softif_neigh_lock);
Simon Wunderlichba85fac2011-04-17 20:34:27 +020098
Marek Lindner61906ae2011-04-21 15:52:17 +020099 kfree(softif_neigh_vid);
100}
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200101
Marek Lindner61906ae2011-04-21 15:52:17 +0200102static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid)
103{
104 if (atomic_dec_and_test(&softif_neigh_vid->refcount))
105 call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu);
106}
107
108static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv,
109 short vid)
110{
111 struct softif_neigh_vid *softif_neigh_vid;
112 struct hlist_node *node;
113
114 rcu_read_lock();
115 hlist_for_each_entry_rcu(softif_neigh_vid, node,
116 &bat_priv->softif_neigh_vids, list) {
117 if (softif_neigh_vid->vid != vid)
118 continue;
119
120 if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
121 continue;
122
123 goto out;
124 }
125
Sven Eckelmann704509b2011-05-14 23:14:54 +0200126 softif_neigh_vid = kzalloc(sizeof(*softif_neigh_vid), GFP_ATOMIC);
Marek Lindner61906ae2011-04-21 15:52:17 +0200127 if (!softif_neigh_vid)
128 goto out;
129
130 softif_neigh_vid->vid = vid;
131 softif_neigh_vid->bat_priv = bat_priv;
132
133 /* initialize with 2 - caller decrements counter by one */
134 atomic_set(&softif_neigh_vid->refcount, 2);
135 INIT_HLIST_HEAD(&softif_neigh_vid->softif_neigh_list);
136 INIT_HLIST_NODE(&softif_neigh_vid->list);
137 spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
138 hlist_add_head_rcu(&softif_neigh_vid->list,
139 &bat_priv->softif_neigh_vids);
140 spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
141
142out:
143 rcu_read_unlock();
144 return softif_neigh_vid;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000145}
146
147static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
Sven Eckelmann747e4222011-05-14 23:14:50 +0200148 const uint8_t *addr, short vid)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000149{
Marek Lindner61906ae2011-04-21 15:52:17 +0200150 struct softif_neigh_vid *softif_neigh_vid;
151 struct softif_neigh *softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000152 struct hlist_node *node;
153
Marek Lindner61906ae2011-04-21 15:52:17 +0200154 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
155 if (!softif_neigh_vid)
156 goto out;
157
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000158 rcu_read_lock();
159 hlist_for_each_entry_rcu(softif_neigh, node,
Marek Lindner61906ae2011-04-21 15:52:17 +0200160 &softif_neigh_vid->softif_neigh_list,
161 list) {
Marek Lindner39901e72011-02-18 12:28:08 +0000162 if (!compare_eth(softif_neigh->addr, addr))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000163 continue;
164
Marek Lindner7d2b5542011-02-10 14:33:50 +0000165 if (!atomic_inc_not_zero(&softif_neigh->refcount))
166 continue;
167
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000168 softif_neigh->last_seen = jiffies;
Marek Lindner61906ae2011-04-21 15:52:17 +0200169 goto unlock;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000170 }
171
Sven Eckelmann704509b2011-05-14 23:14:54 +0200172 softif_neigh = kzalloc(sizeof(*softif_neigh), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000173 if (!softif_neigh)
Marek Lindner61906ae2011-04-21 15:52:17 +0200174 goto unlock;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000175
176 memcpy(softif_neigh->addr, addr, ETH_ALEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000177 softif_neigh->last_seen = jiffies;
Marek Lindner7d2b5542011-02-10 14:33:50 +0000178 /* initialize with 2 - caller decrements counter by one */
179 atomic_set(&softif_neigh->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000180
181 INIT_HLIST_NODE(&softif_neigh->list);
182 spin_lock_bh(&bat_priv->softif_neigh_lock);
Marek Lindner61906ae2011-04-21 15:52:17 +0200183 hlist_add_head_rcu(&softif_neigh->list,
184 &softif_neigh_vid->softif_neigh_list);
185 spin_unlock_bh(&bat_priv->softif_neigh_lock);
186
187unlock:
188 rcu_read_unlock();
189out:
190 if (softif_neigh_vid)
191 softif_neigh_vid_free_ref(softif_neigh_vid);
192 return softif_neigh;
193}
194
195static struct softif_neigh *softif_neigh_get_selected(
196 struct softif_neigh_vid *softif_neigh_vid)
197{
198 struct softif_neigh *softif_neigh;
199
200 rcu_read_lock();
201 softif_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
202
203 if (softif_neigh && !atomic_inc_not_zero(&softif_neigh->refcount))
204 softif_neigh = NULL;
205
206 rcu_read_unlock();
207 return softif_neigh;
208}
209
210static struct softif_neigh *softif_neigh_vid_get_selected(
211 struct bat_priv *bat_priv,
212 short vid)
213{
214 struct softif_neigh_vid *softif_neigh_vid;
215 struct softif_neigh *softif_neigh = NULL;
216
217 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
218 if (!softif_neigh_vid)
219 goto out;
220
221 softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
222out:
223 if (softif_neigh_vid)
224 softif_neigh_vid_free_ref(softif_neigh_vid);
225 return softif_neigh;
226}
227
228static void softif_neigh_vid_select(struct bat_priv *bat_priv,
229 struct softif_neigh *new_neigh,
230 short vid)
231{
232 struct softif_neigh_vid *softif_neigh_vid;
233 struct softif_neigh *curr_neigh;
234
235 softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
236 if (!softif_neigh_vid)
237 goto out;
238
239 spin_lock_bh(&bat_priv->softif_neigh_lock);
240
241 if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
242 new_neigh = NULL;
243
Sven Eckelmann728cbc62011-05-15 00:50:21 +0200244 curr_neigh = rcu_dereference_protected(softif_neigh_vid->softif_neigh,
245 1);
Marek Lindner61906ae2011-04-21 15:52:17 +0200246 rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh);
247
248 if ((curr_neigh) && (!new_neigh))
249 bat_dbg(DBG_ROUTES, bat_priv,
250 "Removing mesh exit point on vid: %d (prev: %pM).\n",
251 vid, curr_neigh->addr);
252 else if ((curr_neigh) && (new_neigh))
253 bat_dbg(DBG_ROUTES, bat_priv,
254 "Changing mesh exit point on vid: %d from %pM "
255 "to %pM.\n", vid, curr_neigh->addr, new_neigh->addr);
256 else if ((!curr_neigh) && (new_neigh))
257 bat_dbg(DBG_ROUTES, bat_priv,
258 "Setting mesh exit point on vid: %d to %pM.\n",
259 vid, new_neigh->addr);
260
261 if (curr_neigh)
262 softif_neigh_free_ref(curr_neigh);
263
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000264 spin_unlock_bh(&bat_priv->softif_neigh_lock);
265
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000266out:
Marek Lindner61906ae2011-04-21 15:52:17 +0200267 if (softif_neigh_vid)
268 softif_neigh_vid_free_ref(softif_neigh_vid);
269}
270
271static void softif_neigh_vid_deselect(struct bat_priv *bat_priv,
272 struct softif_neigh_vid *softif_neigh_vid)
273{
274 struct softif_neigh *curr_neigh;
275 struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp;
276 struct hard_iface *primary_if = NULL;
277 struct hlist_node *node;
278
279 primary_if = primary_if_get_selected(bat_priv);
280 if (!primary_if)
281 goto out;
282
283 /* find new softif_neigh immediately to avoid temporary loops */
284 rcu_read_lock();
285 curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
286
287 hlist_for_each_entry_rcu(softif_neigh_tmp, node,
288 &softif_neigh_vid->softif_neigh_list,
289 list) {
290 if (softif_neigh_tmp == curr_neigh)
291 continue;
292
293 /* we got a neighbor but its mac is 'bigger' than ours */
294 if (memcmp(primary_if->net_dev->dev_addr,
295 softif_neigh_tmp->addr, ETH_ALEN) < 0)
296 continue;
297
298 if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount))
299 continue;
300
301 softif_neigh = softif_neigh_tmp;
302 goto unlock;
303 }
304
305unlock:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000306 rcu_read_unlock();
Marek Lindner61906ae2011-04-21 15:52:17 +0200307out:
308 softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid);
309
310 if (primary_if)
311 hardif_free_ref(primary_if);
312 if (softif_neigh)
313 softif_neigh_free_ref(softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000314}
315
316int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
317{
318 struct net_device *net_dev = (struct net_device *)seq->private;
319 struct bat_priv *bat_priv = netdev_priv(net_dev);
Marek Lindner61906ae2011-04-21 15:52:17 +0200320 struct softif_neigh_vid *softif_neigh_vid;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000321 struct softif_neigh *softif_neigh;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200322 struct hard_iface *primary_if;
Marek Lindner61906ae2011-04-21 15:52:17 +0200323 struct hlist_node *node, *node_tmp;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200324 struct softif_neigh *curr_softif_neigh;
Marek Lindner61906ae2011-04-21 15:52:17 +0200325 int ret = 0, last_seen_secs, last_seen_msecs;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000326
Marek Lindner32ae9b22011-04-20 15:40:58 +0200327 primary_if = primary_if_get_selected(bat_priv);
328 if (!primary_if) {
329 ret = seq_printf(seq, "BATMAN mesh %s disabled - "
330 "please specify interfaces to enable it\n",
331 net_dev->name);
332 goto out;
333 }
334
335 if (primary_if->if_status != IF_ACTIVE) {
336 ret = seq_printf(seq, "BATMAN mesh %s "
337 "disabled - primary interface not active\n",
338 net_dev->name);
339 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000340 }
341
342 seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
343
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000344 rcu_read_lock();
Marek Lindner61906ae2011-04-21 15:52:17 +0200345 hlist_for_each_entry_rcu(softif_neigh_vid, node,
346 &bat_priv->softif_neigh_vids, list) {
347 seq_printf(seq, " %-15s %s on vid: %d\n",
348 "Originator", "last-seen", softif_neigh_vid->vid);
349
350 curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
351
352 hlist_for_each_entry_rcu(softif_neigh, node_tmp,
353 &softif_neigh_vid->softif_neigh_list,
354 list) {
355 last_seen_secs = jiffies_to_msecs(jiffies -
356 softif_neigh->last_seen) / 1000;
357 last_seen_msecs = jiffies_to_msecs(jiffies -
358 softif_neigh->last_seen) % 1000;
359 seq_printf(seq, "%s %pM %3i.%03is\n",
360 curr_softif_neigh == softif_neigh
361 ? "=>" : " ", softif_neigh->addr,
362 last_seen_secs, last_seen_msecs);
363 }
364
365 if (curr_softif_neigh)
366 softif_neigh_free_ref(curr_softif_neigh);
367
368 seq_printf(seq, "\n");
369 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000370 rcu_read_unlock();
371
Marek Lindner32ae9b22011-04-20 15:40:58 +0200372out:
373 if (primary_if)
374 hardif_free_ref(primary_if);
375 return ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000376}
377
Marek Lindner61906ae2011-04-21 15:52:17 +0200378void softif_neigh_purge(struct bat_priv *bat_priv)
379{
380 struct softif_neigh *softif_neigh, *curr_softif_neigh;
381 struct softif_neigh_vid *softif_neigh_vid;
382 struct hlist_node *node, *node_tmp, *node_tmp2;
Sven Eckelmannb4e17052011-06-15 09:41:37 +0200383 int do_deselect;
Marek Lindner61906ae2011-04-21 15:52:17 +0200384
385 rcu_read_lock();
386 hlist_for_each_entry_rcu(softif_neigh_vid, node,
387 &bat_priv->softif_neigh_vids, list) {
388 if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
389 continue;
390
391 curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
392 do_deselect = 0;
393
394 spin_lock_bh(&bat_priv->softif_neigh_lock);
395 hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2,
396 &softif_neigh_vid->softif_neigh_list,
397 list) {
398 if ((!time_after(jiffies, softif_neigh->last_seen +
399 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
400 (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
401 continue;
402
403 if (curr_softif_neigh == softif_neigh) {
404 bat_dbg(DBG_ROUTES, bat_priv,
405 "Current mesh exit point on vid: %d "
406 "'%pM' vanished.\n",
407 softif_neigh_vid->vid,
408 softif_neigh->addr);
409 do_deselect = 1;
410 }
411
412 hlist_del_rcu(&softif_neigh->list);
413 softif_neigh_free_ref(softif_neigh);
414 }
415 spin_unlock_bh(&bat_priv->softif_neigh_lock);
416
417 /* soft_neigh_vid_deselect() needs to acquire the
418 * softif_neigh_lock */
419 if (do_deselect)
420 softif_neigh_vid_deselect(bat_priv, softif_neigh_vid);
421
422 if (curr_softif_neigh)
423 softif_neigh_free_ref(curr_softif_neigh);
424
425 softif_neigh_vid_free_ref(softif_neigh_vid);
426 }
427 rcu_read_unlock();
428
429 spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
430 hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp,
431 &bat_priv->softif_neigh_vids, list) {
432 if (!hlist_empty(&softif_neigh_vid->softif_neigh_list))
433 continue;
434
435 hlist_del_rcu(&softif_neigh_vid->list);
436 softif_neigh_vid_free_ref(softif_neigh_vid);
437 }
438 spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
439
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000440}
441
442static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
443 short vid)
444{
445 struct bat_priv *bat_priv = netdev_priv(dev);
446 struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
447 struct batman_packet *batman_packet;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200448 struct softif_neigh *softif_neigh = NULL;
449 struct hard_iface *primary_if = NULL;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200450 struct softif_neigh *curr_softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000451
452 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
453 batman_packet = (struct batman_packet *)
454 (skb->data + ETH_HLEN + VLAN_HLEN);
455 else
456 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
457
458 if (batman_packet->version != COMPAT_VERSION)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200459 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000460
461 if (batman_packet->packet_type != BAT_PACKET)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200462 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000463
464 if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
Marek Lindner32ae9b22011-04-20 15:40:58 +0200465 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000466
467 if (is_my_mac(batman_packet->orig))
Marek Lindner32ae9b22011-04-20 15:40:58 +0200468 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000469
470 softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000471 if (!softif_neigh)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200472 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000473
Marek Lindner61906ae2011-04-21 15:52:17 +0200474 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200475 if (curr_softif_neigh == softif_neigh)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000476 goto out;
477
Marek Lindner32ae9b22011-04-20 15:40:58 +0200478 primary_if = primary_if_get_selected(bat_priv);
479 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000480 goto out;
481
482 /* we got a neighbor but its mac is 'bigger' than ours */
Marek Lindner32ae9b22011-04-20 15:40:58 +0200483 if (memcmp(primary_if->net_dev->dev_addr,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000484 softif_neigh->addr, ETH_ALEN) < 0)
485 goto out;
486
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000487 /* close own batX device and use softif_neigh as exit node */
Marek Lindner61906ae2011-04-21 15:52:17 +0200488 if (!curr_softif_neigh) {
489 softif_neigh_vid_select(bat_priv, softif_neigh, vid);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200490 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000491 }
492
Marek Lindner61906ae2011-04-21 15:52:17 +0200493 /* switch to new 'smallest neighbor' */
494 if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0)
495 softif_neigh_vid_select(bat_priv, softif_neigh, vid);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000496
497out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000498 kfree_skb(skb);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200499 if (softif_neigh)
500 softif_neigh_free_ref(softif_neigh);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200501 if (curr_softif_neigh)
502 softif_neigh_free_ref(curr_softif_neigh);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200503 if (primary_if)
504 hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000505 return;
506}
507
508static int interface_open(struct net_device *dev)
509{
510 netif_start_queue(dev);
511 return 0;
512}
513
514static int interface_release(struct net_device *dev)
515{
516 netif_stop_queue(dev);
517 return 0;
518}
519
520static struct net_device_stats *interface_stats(struct net_device *dev)
521{
522 struct bat_priv *bat_priv = netdev_priv(dev);
523 return &bat_priv->stats;
524}
525
526static int interface_set_mac_addr(struct net_device *dev, void *p)
527{
528 struct bat_priv *bat_priv = netdev_priv(dev);
529 struct sockaddr *addr = p;
530
531 if (!is_valid_ether_addr(addr->sa_data))
532 return -EADDRNOTAVAIL;
533
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200534 /* only modify transtable if it has been initialised before */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000535 if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200536 tt_local_remove(bat_priv, dev->dev_addr,
Antonio Quartullicc47f662011-04-27 14:27:57 +0200537 "mac address changed", false);
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200538 tt_local_add(dev, addr->sa_data);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000539 }
540
541 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
542 return 0;
543}
544
545static int interface_change_mtu(struct net_device *dev, int new_mtu)
546{
547 /* check ranges */
548 if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
549 return -EINVAL;
550
551 dev->mtu = new_mtu;
552
553 return 0;
554}
555
Sven Eckelmanndb69ecf2011-06-15 15:17:21 +0200556static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000557{
558 struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
559 struct bat_priv *bat_priv = netdev_priv(soft_iface);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200560 struct hard_iface *primary_if = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000561 struct bcast_packet *bcast_packet;
562 struct vlan_ethhdr *vhdr;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200563 struct softif_neigh *curr_softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000564 int data_len = skb->len, ret;
565 short vid = -1;
566 bool do_bcast = false;
567
568 if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
569 goto dropped;
570
571 soft_iface->trans_start = jiffies;
572
573 switch (ntohs(ethhdr->h_proto)) {
574 case ETH_P_8021Q:
575 vhdr = (struct vlan_ethhdr *)skb->data;
576 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
577
578 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
579 break;
580
581 /* fall through */
582 case ETH_P_BATMAN:
583 softif_batman_recv(skb, soft_iface, vid);
584 goto end;
585 }
586
587 /**
588 * if we have a another chosen mesh exit node in range
589 * it will transport the packets to the mesh
590 */
Marek Lindner61906ae2011-04-21 15:52:17 +0200591 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
592 if (curr_softif_neigh)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000593 goto dropped;
594
Antonio Quartullia73105b2011-04-27 14:27:44 +0200595 /* Register the client MAC in the transtable */
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200596 tt_local_add(soft_iface, ethhdr->h_source);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000597
598 if (is_multicast_ether_addr(ethhdr->h_dest)) {
599 ret = gw_is_target(bat_priv, skb);
600
601 if (ret < 0)
602 goto dropped;
603
604 if (ret == 0)
605 do_bcast = true;
606 }
607
608 /* ethernet packet should be broadcasted */
609 if (do_bcast) {
Marek Lindner32ae9b22011-04-20 15:40:58 +0200610 primary_if = primary_if_get_selected(bat_priv);
611 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000612 goto dropped;
613
Sven Eckelmann704509b2011-05-14 23:14:54 +0200614 if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000615 goto dropped;
616
617 bcast_packet = (struct bcast_packet *)skb->data;
618 bcast_packet->version = COMPAT_VERSION;
619 bcast_packet->ttl = TTL;
620
621 /* batman packet type: broadcast */
622 bcast_packet->packet_type = BAT_BCAST;
623
624 /* hw address of first interface is the orig mac because only
625 * this mac is known throughout the mesh */
626 memcpy(bcast_packet->orig,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200627 primary_if->net_dev->dev_addr, ETH_ALEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000628
629 /* set broadcast sequence number */
630 bcast_packet->seqno =
631 htonl(atomic_inc_return(&bat_priv->bcast_seqno));
632
633 add_bcast_packet_to_list(bat_priv, skb);
634
635 /* a copy is stored in the bcast list, therefore removing
636 * the original skb. */
637 kfree_skb(skb);
638
639 /* unicast packet */
640 } else {
641 ret = unicast_send_skb(skb, bat_priv);
642 if (ret != 0)
643 goto dropped_freed;
644 }
645
646 bat_priv->stats.tx_packets++;
647 bat_priv->stats.tx_bytes += data_len;
648 goto end;
649
650dropped:
651 kfree_skb(skb);
652dropped_freed:
653 bat_priv->stats.tx_dropped++;
654end:
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200655 if (curr_softif_neigh)
656 softif_neigh_free_ref(curr_softif_neigh);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200657 if (primary_if)
658 hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000659 return NETDEV_TX_OK;
660}
661
662void interface_rx(struct net_device *soft_iface,
Marek Lindnere6c10f42011-02-18 12:33:20 +0000663 struct sk_buff *skb, struct hard_iface *recv_if,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000664 int hdr_size)
665{
666 struct bat_priv *bat_priv = netdev_priv(soft_iface);
667 struct unicast_packet *unicast_packet;
668 struct ethhdr *ethhdr;
669 struct vlan_ethhdr *vhdr;
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200670 struct softif_neigh *curr_softif_neigh = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000671 short vid = -1;
672 int ret;
673
674 /* check if enough space is available for pulling, and pull */
675 if (!pskb_may_pull(skb, hdr_size))
676 goto dropped;
677
678 skb_pull_rcsum(skb, hdr_size);
679 skb_reset_mac_header(skb);
680
681 ethhdr = (struct ethhdr *)skb_mac_header(skb);
682
683 switch (ntohs(ethhdr->h_proto)) {
684 case ETH_P_8021Q:
685 vhdr = (struct vlan_ethhdr *)skb->data;
686 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
687
688 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
689 break;
690
691 /* fall through */
692 case ETH_P_BATMAN:
693 goto dropped;
694 }
695
696 /**
697 * if we have a another chosen mesh exit node in range
698 * it will transport the packets to the non-mesh network
699 */
Marek Lindner61906ae2011-04-21 15:52:17 +0200700 curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
701 if (curr_softif_neigh) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000702 skb_push(skb, hdr_size);
703 unicast_packet = (struct unicast_packet *)skb->data;
704
705 if ((unicast_packet->packet_type != BAT_UNICAST) &&
706 (unicast_packet->packet_type != BAT_UNICAST_FRAG))
707 goto dropped;
708
709 skb_reset_mac_header(skb);
710
711 memcpy(unicast_packet->dest,
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200712 curr_softif_neigh->addr, ETH_ALEN);
Linus Lüssing7cefb142011-03-02 17:39:31 +0000713 ret = route_unicast_packet(skb, recv_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000714 if (ret == NET_RX_DROP)
715 goto dropped;
716
717 goto out;
718 }
719
720 /* skb->dev & skb->pkt_type are set here */
721 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
722 goto dropped;
723 skb->protocol = eth_type_trans(skb, soft_iface);
724
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300725 /* should not be necessary anymore as we use skb_pull_rcsum()
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000726 * TODO: please verify this and remove this TODO
727 * -- Dec 21st 2009, Simon Wunderlich */
728
729/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
730
731 bat_priv->stats.rx_packets++;
732 bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
733
734 soft_iface->last_rx = jiffies;
735
736 netif_rx(skb);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200737 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000738
739dropped:
740 kfree_skb(skb);
741out:
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200742 if (curr_softif_neigh)
743 softif_neigh_free_ref(curr_softif_neigh);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000744 return;
745}
746
747#ifdef HAVE_NET_DEVICE_OPS
748static const struct net_device_ops bat_netdev_ops = {
749 .ndo_open = interface_open,
750 .ndo_stop = interface_release,
751 .ndo_get_stats = interface_stats,
752 .ndo_set_mac_address = interface_set_mac_addr,
753 .ndo_change_mtu = interface_change_mtu,
754 .ndo_start_xmit = interface_tx,
755 .ndo_validate_addr = eth_validate_addr
756};
757#endif
758
759static void interface_setup(struct net_device *dev)
760{
761 struct bat_priv *priv = netdev_priv(dev);
762 char dev_addr[ETH_ALEN];
763
764 ether_setup(dev);
765
766#ifdef HAVE_NET_DEVICE_OPS
767 dev->netdev_ops = &bat_netdev_ops;
768#else
769 dev->open = interface_open;
770 dev->stop = interface_release;
771 dev->get_stats = interface_stats;
772 dev->set_mac_address = interface_set_mac_addr;
773 dev->change_mtu = interface_change_mtu;
774 dev->hard_start_xmit = interface_tx;
775#endif
776 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
804 if (!soft_iface) {
805 pr_err("Unable to allocate the batman interface: %s\n", name);
806 goto out;
807 }
808
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200809 ret = register_netdevice(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000810 if (ret < 0) {
811 pr_err("Unable to register the batman interface '%s': %i\n",
812 name, ret);
813 goto free_soft_iface;
814 }
815
816 bat_priv = netdev_priv(soft_iface);
817
818 atomic_set(&bat_priv->aggregated_ogms, 1);
819 atomic_set(&bat_priv->bonding, 0);
820 atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
821 atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
822 atomic_set(&bat_priv->gw_sel_class, 20);
823 atomic_set(&bat_priv->gw_bandwidth, 41);
824 atomic_set(&bat_priv->orig_interval, 1000);
825 atomic_set(&bat_priv->hop_penalty, 10);
826 atomic_set(&bat_priv->log_level, 0);
827 atomic_set(&bat_priv->fragmentation, 1);
828 atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
829 atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
830
831 atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
832 atomic_set(&bat_priv->bcast_seqno, 1);
Antonio Quartullia73105b2011-04-27 14:27:44 +0200833 atomic_set(&bat_priv->ttvn, 0);
834 atomic_set(&bat_priv->tt_local_changes, 0);
835 atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
836
837 bat_priv->tt_buff = NULL;
838 bat_priv->tt_buff_len = 0;
Antonio Quartullicc47f662011-04-27 14:27:57 +0200839 bat_priv->tt_poss_change = false;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000840
841 bat_priv->primary_if = NULL;
842 bat_priv->num_ifaces = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000843
844 ret = sysfs_add_meshif(soft_iface);
845 if (ret < 0)
846 goto unreg_soft_iface;
847
848 ret = debugfs_add_meshif(soft_iface);
849 if (ret < 0)
850 goto unreg_sysfs;
851
852 ret = mesh_init(soft_iface);
853 if (ret < 0)
854 goto unreg_debugfs;
855
856 return soft_iface;
857
858unreg_debugfs:
859 debugfs_del_meshif(soft_iface);
860unreg_sysfs:
861 sysfs_del_meshif(soft_iface);
862unreg_soft_iface:
863 unregister_netdev(soft_iface);
864 return NULL;
865
866free_soft_iface:
867 free_netdev(soft_iface);
868out:
869 return NULL;
870}
871
872void softif_destroy(struct net_device *soft_iface)
873{
874 debugfs_del_meshif(soft_iface);
875 sysfs_del_meshif(soft_iface);
876 mesh_free(soft_iface);
877 unregister_netdevice(soft_iface);
878}
879
Sven Eckelmann747e4222011-05-14 23:14:50 +0200880int softif_is_valid(const struct net_device *net_dev)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000881{
882#ifdef HAVE_NET_DEVICE_OPS
883 if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
884 return 1;
885#else
886 if (net_dev->hard_start_xmit == interface_tx)
887 return 1;
888#endif
889
890 return 0;
891}
892
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000893/* ethtool */
894static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
895{
896 cmd->supported = 0;
897 cmd->advertising = 0;
David Decotigny70739492011-04-27 18:32:40 +0000898 ethtool_cmd_speed_set(cmd, SPEED_10);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000899 cmd->duplex = DUPLEX_FULL;
900 cmd->port = PORT_TP;
901 cmd->phy_address = 0;
902 cmd->transceiver = XCVR_INTERNAL;
903 cmd->autoneg = AUTONEG_DISABLE;
904 cmd->maxtxpkt = 0;
905 cmd->maxrxpkt = 0;
906
907 return 0;
908}
909
910static void bat_get_drvinfo(struct net_device *dev,
911 struct ethtool_drvinfo *info)
912{
913 strcpy(info->driver, "B.A.T.M.A.N. advanced");
914 strcpy(info->version, SOURCE_VERSION);
915 strcpy(info->fw_version, "N/A");
916 strcpy(info->bus_info, "batman");
917}
918
919static u32 bat_get_msglevel(struct net_device *dev)
920{
921 return -EOPNOTSUPP;
922}
923
924static void bat_set_msglevel(struct net_device *dev, u32 value)
925{
926}
927
928static u32 bat_get_link(struct net_device *dev)
929{
930 return 1;
931}