Commit | Line | Data |
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c6c8fea2 | 1 | /* |
64afe353 | 2 | * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
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" | |
c6c8fea2 SE |
29 | #include "hash.h" |
30 | #include "gateway_common.h" | |
31 | #include "gateway_client.h" | |
c6c8fea2 | 32 | #include "bat_sysfs.h" |
43676ab5 | 33 | #include "originator.h" |
c6c8fea2 SE |
34 | #include <linux/slab.h> |
35 | #include <linux/ethtool.h> | |
36 | #include <linux/etherdevice.h> | |
37 | #include <linux/if_vlan.h> | |
38 | #include "unicast.h" | |
c6c8fea2 SE |
39 | |
40 | ||
41 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
42 | static void bat_get_drvinfo(struct net_device *dev, | |
43 | struct ethtool_drvinfo *info); | |
44 | static u32 bat_get_msglevel(struct net_device *dev); | |
45 | static void bat_set_msglevel(struct net_device *dev, u32 value); | |
46 | static u32 bat_get_link(struct net_device *dev); | |
c6c8fea2 SE |
47 | |
48 | static 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, | |
c6c8fea2 SE |
54 | }; |
55 | ||
56 | int 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 | ||
7d2b5548 | 76 | static void softif_neigh_free_ref(struct softif_neigh *softif_neigh) |
c6c8fea2 | 77 | { |
7d2b5548 | 78 | if (atomic_dec_and_test(&softif_neigh->refcount)) |
8e3572cf | 79 | kfree_rcu(softif_neigh, rcu); |
c6c8fea2 SE |
80 | } |
81 | ||
61906ae8 | 82 | static void softif_neigh_vid_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 83 | { |
61906ae8 ML |
84 | struct softif_neigh_vid *softif_neigh_vid; |
85 | struct softif_neigh *softif_neigh; | |
c6c8fea2 | 86 | struct hlist_node *node, *node_tmp; |
61906ae8 | 87 | struct bat_priv *bat_priv; |
c6c8fea2 | 88 | |
61906ae8 ML |
89 | softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu); |
90 | bat_priv = softif_neigh_vid->bat_priv; | |
c6c8fea2 | 91 | |
ba85fac2 | 92 | spin_lock_bh(&bat_priv->softif_neigh_lock); |
c6c8fea2 | 93 | hlist_for_each_entry_safe(softif_neigh, node, node_tmp, |
61906ae8 ML |
94 | &softif_neigh_vid->softif_neigh_list, list) { |
95 | hlist_del_rcu(&softif_neigh->list); | |
96 | softif_neigh_free_ref(softif_neigh); | |
97 | } | |
ba85fac2 | 98 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
c6c8fea2 | 99 | |
61906ae8 | 100 | kfree(softif_neigh_vid); |
ba85fac2 | 101 | } |
c6c8fea2 | 102 | |
61906ae8 | 103 | static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid) |
ba85fac2 | 104 | { |
61906ae8 ML |
105 | if (atomic_dec_and_test(&softif_neigh_vid->refcount)) |
106 | call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu); | |
ba85fac2 | 107 | } |
c6c8fea2 | 108 | |
61906ae8 ML |
109 | static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv, |
110 | short vid) | |
c6c8fea2 | 111 | { |
61906ae8 ML |
112 | struct softif_neigh_vid *softif_neigh_vid; |
113 | struct hlist_node *node; | |
c6c8fea2 | 114 | |
61906ae8 ML |
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) | |
c6c8fea2 SE |
119 | continue; |
120 | ||
61906ae8 ML |
121 | if (!atomic_inc_not_zero(&softif_neigh_vid->refcount)) |
122 | continue; | |
c6c8fea2 | 123 | |
61906ae8 | 124 | goto out; |
c6c8fea2 SE |
125 | } |
126 | ||
704509b8 | 127 | softif_neigh_vid = kzalloc(sizeof(*softif_neigh_vid), GFP_ATOMIC); |
61906ae8 ML |
128 | if (!softif_neigh_vid) |
129 | goto out; | |
ba85fac2 | 130 | |
61906ae8 ML |
131 | softif_neigh_vid->vid = vid; |
132 | softif_neigh_vid->bat_priv = bat_priv; | |
ba85fac2 | 133 | |
61906ae8 ML |
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 | ||
143 | out: | |
144 | rcu_read_unlock(); | |
145 | return softif_neigh_vid; | |
c6c8fea2 SE |
146 | } |
147 | ||
148 | static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv, | |
747e4221 | 149 | const uint8_t *addr, short vid) |
c6c8fea2 | 150 | { |
61906ae8 ML |
151 | struct softif_neigh_vid *softif_neigh_vid; |
152 | struct softif_neigh *softif_neigh = NULL; | |
c6c8fea2 SE |
153 | struct hlist_node *node; |
154 | ||
61906ae8 ML |
155 | softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid); |
156 | if (!softif_neigh_vid) | |
157 | goto out; | |
158 | ||
c6c8fea2 SE |
159 | rcu_read_lock(); |
160 | hlist_for_each_entry_rcu(softif_neigh, node, | |
61906ae8 ML |
161 | &softif_neigh_vid->softif_neigh_list, |
162 | list) { | |
39901e71 | 163 | if (!compare_eth(softif_neigh->addr, addr)) |
c6c8fea2 SE |
164 | continue; |
165 | ||
7d2b5548 ML |
166 | if (!atomic_inc_not_zero(&softif_neigh->refcount)) |
167 | continue; | |
168 | ||
c6c8fea2 | 169 | softif_neigh->last_seen = jiffies; |
61906ae8 | 170 | goto unlock; |
c6c8fea2 SE |
171 | } |
172 | ||
704509b8 | 173 | softif_neigh = kzalloc(sizeof(*softif_neigh), GFP_ATOMIC); |
c6c8fea2 | 174 | if (!softif_neigh) |
61906ae8 | 175 | goto unlock; |
c6c8fea2 SE |
176 | |
177 | memcpy(softif_neigh->addr, addr, ETH_ALEN); | |
c6c8fea2 | 178 | softif_neigh->last_seen = jiffies; |
7d2b5548 ML |
179 | /* initialize with 2 - caller decrements counter by one */ |
180 | atomic_set(&softif_neigh->refcount, 2); | |
c6c8fea2 SE |
181 | |
182 | INIT_HLIST_NODE(&softif_neigh->list); | |
183 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
61906ae8 ML |
184 | hlist_add_head_rcu(&softif_neigh->list, |
185 | &softif_neigh_vid->softif_neigh_list); | |
c6c8fea2 SE |
186 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
187 | ||
61906ae8 ML |
188 | unlock: |
189 | rcu_read_unlock(); | |
c6c8fea2 | 190 | out: |
61906ae8 ML |
191 | if (softif_neigh_vid) |
192 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
193 | return softif_neigh; | |
194 | } | |
195 | ||
196 | static 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 | ||
c6c8fea2 SE |
207 | rcu_read_unlock(); |
208 | return softif_neigh; | |
209 | } | |
210 | ||
61906ae8 ML |
211 | static 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); | |
223 | out: | |
224 | if (softif_neigh_vid) | |
225 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
226 | return softif_neigh; | |
227 | } | |
228 | ||
229 | static 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 | ||
728cbc6a SE |
245 | curr_neigh = rcu_dereference_protected(softif_neigh_vid->softif_neigh, |
246 | 1); | |
61906ae8 ML |
247 | 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 | ||
265 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
266 | ||
267 | out: | |
268 | if (softif_neigh_vid) | |
269 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
270 | } | |
271 | ||
272 | static 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 | ||
306 | unlock: | |
307 | rcu_read_unlock(); | |
308 | out: | |
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); | |
315 | } | |
316 | ||
c6c8fea2 SE |
317 | int 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); | |
61906ae8 | 321 | struct softif_neigh_vid *softif_neigh_vid; |
c6c8fea2 | 322 | struct softif_neigh *softif_neigh; |
32ae9b22 | 323 | struct hard_iface *primary_if; |
61906ae8 | 324 | struct hlist_node *node, *node_tmp; |
ba85fac2 | 325 | struct softif_neigh *curr_softif_neigh; |
61906ae8 | 326 | int ret = 0, last_seen_secs, last_seen_msecs; |
c6c8fea2 | 327 | |
32ae9b22 ML |
328 | 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 | } | |
c6c8fea2 | 335 | |
32ae9b22 ML |
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; | |
c6c8fea2 SE |
341 | } |
342 | ||
343 | seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name); | |
344 | ||
c6c8fea2 | 345 | rcu_read_lock(); |
61906ae8 ML |
346 | 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 | } | |
c6c8fea2 SE |
371 | rcu_read_unlock(); |
372 | ||
32ae9b22 ML |
373 | out: |
374 | if (primary_if) | |
375 | hardif_free_ref(primary_if); | |
376 | return ret; | |
c6c8fea2 SE |
377 | } |
378 | ||
61906ae8 ML |
379 | void 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; | |
b4e17054 | 384 | int do_deselect; |
61906ae8 ML |
385 | |
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 | ||
c6c8fea2 SE |
441 | } |
442 | ||
443 | static 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; | |
448 | struct batman_packet *batman_packet; | |
32ae9b22 ML |
449 | struct softif_neigh *softif_neigh = NULL; |
450 | struct hard_iface *primary_if = NULL; | |
ba85fac2 | 451 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
452 | |
453 | if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) | |
454 | batman_packet = (struct batman_packet *) | |
455 | (skb->data + ETH_HLEN + VLAN_HLEN); | |
456 | else | |
457 | batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN); | |
458 | ||
459 | if (batman_packet->version != COMPAT_VERSION) | |
32ae9b22 | 460 | goto out; |
c6c8fea2 SE |
461 | |
462 | if (batman_packet->packet_type != BAT_PACKET) | |
32ae9b22 | 463 | goto out; |
c6c8fea2 SE |
464 | |
465 | if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) | |
32ae9b22 | 466 | goto out; |
c6c8fea2 SE |
467 | |
468 | if (is_my_mac(batman_packet->orig)) | |
32ae9b22 | 469 | goto out; |
c6c8fea2 SE |
470 | |
471 | softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); | |
c6c8fea2 | 472 | if (!softif_neigh) |
32ae9b22 | 473 | goto out; |
c6c8fea2 | 474 | |
61906ae8 | 475 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
ba85fac2 | 476 | if (curr_softif_neigh == softif_neigh) |
c6c8fea2 SE |
477 | goto out; |
478 | ||
32ae9b22 ML |
479 | primary_if = primary_if_get_selected(bat_priv); |
480 | if (!primary_if) | |
c6c8fea2 SE |
481 | goto out; |
482 | ||
483 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
32ae9b22 | 484 | if (memcmp(primary_if->net_dev->dev_addr, |
c6c8fea2 SE |
485 | softif_neigh->addr, ETH_ALEN) < 0) |
486 | goto out; | |
487 | ||
c6c8fea2 | 488 | /* close own batX device and use softif_neigh as exit node */ |
61906ae8 ML |
489 | if (!curr_softif_neigh) { |
490 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
ba85fac2 | 491 | goto out; |
c6c8fea2 SE |
492 | } |
493 | ||
61906ae8 ML |
494 | /* switch to new 'smallest neighbor' */ |
495 | if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0) | |
496 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
497 | ||
c6c8fea2 | 498 | out: |
c6c8fea2 | 499 | kfree_skb(skb); |
32ae9b22 ML |
500 | if (softif_neigh) |
501 | softif_neigh_free_ref(softif_neigh); | |
ba85fac2 SW |
502 | if (curr_softif_neigh) |
503 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
504 | if (primary_if) |
505 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
506 | return; |
507 | } | |
508 | ||
509 | static int interface_open(struct net_device *dev) | |
510 | { | |
511 | netif_start_queue(dev); | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static int interface_release(struct net_device *dev) | |
516 | { | |
517 | netif_stop_queue(dev); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static struct net_device_stats *interface_stats(struct net_device *dev) | |
522 | { | |
523 | struct bat_priv *bat_priv = netdev_priv(dev); | |
524 | return &bat_priv->stats; | |
525 | } | |
526 | ||
527 | static int interface_set_mac_addr(struct net_device *dev, void *p) | |
528 | { | |
529 | struct bat_priv *bat_priv = netdev_priv(dev); | |
530 | struct sockaddr *addr = p; | |
531 | ||
532 | if (!is_valid_ether_addr(addr->sa_data)) | |
533 | return -EADDRNOTAVAIL; | |
534 | ||
2dafb49d | 535 | /* only modify transtable if it has been initialised before */ |
c6c8fea2 | 536 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { |
2dafb49d | 537 | tt_local_remove(bat_priv, dev->dev_addr, |
cc47f66e | 538 | "mac address changed", false); |
2dafb49d | 539 | tt_local_add(dev, addr->sa_data); |
c6c8fea2 SE |
540 | } |
541 | ||
542 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | static int interface_change_mtu(struct net_device *dev, int new_mtu) | |
547 | { | |
548 | /* check ranges */ | |
549 | if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev))) | |
550 | return -EINVAL; | |
551 | ||
552 | dev->mtu = new_mtu; | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
db69ecfc | 557 | static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) |
c6c8fea2 SE |
558 | { |
559 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
560 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
32ae9b22 | 561 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
562 | struct bcast_packet *bcast_packet; |
563 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 564 | struct softif_neigh *curr_softif_neigh = NULL; |
43676ab5 | 565 | struct orig_node *orig_node = NULL; |
c6c8fea2 SE |
566 | int data_len = skb->len, ret; |
567 | short vid = -1; | |
568 | bool do_bcast = false; | |
569 | ||
570 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) | |
571 | goto dropped; | |
572 | ||
573 | soft_iface->trans_start = jiffies; | |
574 | ||
575 | switch (ntohs(ethhdr->h_proto)) { | |
576 | case ETH_P_8021Q: | |
577 | vhdr = (struct vlan_ethhdr *)skb->data; | |
578 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
579 | ||
580 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
581 | break; | |
582 | ||
583 | /* fall through */ | |
584 | case ETH_P_BATMAN: | |
585 | softif_batman_recv(skb, soft_iface, vid); | |
586 | goto end; | |
587 | } | |
588 | ||
589 | /** | |
590 | * if we have a another chosen mesh exit node in range | |
591 | * it will transport the packets to the mesh | |
592 | */ | |
61906ae8 ML |
593 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
594 | if (curr_softif_neigh) | |
c6c8fea2 SE |
595 | goto dropped; |
596 | ||
a73105b8 | 597 | /* Register the client MAC in the transtable */ |
2dafb49d | 598 | tt_local_add(soft_iface, ethhdr->h_source); |
c6c8fea2 | 599 | |
43676ab5 AQ |
600 | orig_node = transtable_search(bat_priv, ethhdr->h_dest); |
601 | if (is_multicast_ether_addr(ethhdr->h_dest) || | |
602 | (orig_node && orig_node->gw_flags)) { | |
603 | ret = gw_is_target(bat_priv, skb, orig_node); | |
c6c8fea2 SE |
604 | |
605 | if (ret < 0) | |
606 | goto dropped; | |
607 | ||
608 | if (ret == 0) | |
609 | do_bcast = true; | |
610 | } | |
611 | ||
612 | /* ethernet packet should be broadcasted */ | |
613 | if (do_bcast) { | |
32ae9b22 ML |
614 | primary_if = primary_if_get_selected(bat_priv); |
615 | if (!primary_if) | |
c6c8fea2 SE |
616 | goto dropped; |
617 | ||
704509b8 | 618 | if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
619 | goto dropped; |
620 | ||
621 | bcast_packet = (struct bcast_packet *)skb->data; | |
622 | bcast_packet->version = COMPAT_VERSION; | |
623 | bcast_packet->ttl = TTL; | |
624 | ||
625 | /* batman packet type: broadcast */ | |
626 | bcast_packet->packet_type = BAT_BCAST; | |
627 | ||
628 | /* hw address of first interface is the orig mac because only | |
629 | * this mac is known throughout the mesh */ | |
630 | memcpy(bcast_packet->orig, | |
32ae9b22 | 631 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
632 | |
633 | /* set broadcast sequence number */ | |
634 | bcast_packet->seqno = | |
635 | htonl(atomic_inc_return(&bat_priv->bcast_seqno)); | |
636 | ||
8698529d | 637 | add_bcast_packet_to_list(bat_priv, skb, 1); |
c6c8fea2 SE |
638 | |
639 | /* a copy is stored in the bcast list, therefore removing | |
640 | * the original skb. */ | |
641 | kfree_skb(skb); | |
642 | ||
643 | /* unicast packet */ | |
644 | } else { | |
645 | ret = unicast_send_skb(skb, bat_priv); | |
646 | if (ret != 0) | |
647 | goto dropped_freed; | |
648 | } | |
649 | ||
650 | bat_priv->stats.tx_packets++; | |
651 | bat_priv->stats.tx_bytes += data_len; | |
652 | goto end; | |
653 | ||
654 | dropped: | |
655 | kfree_skb(skb); | |
656 | dropped_freed: | |
657 | bat_priv->stats.tx_dropped++; | |
658 | end: | |
ba85fac2 SW |
659 | if (curr_softif_neigh) |
660 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
661 | if (primary_if) |
662 | hardif_free_ref(primary_if); | |
43676ab5 AQ |
663 | if (orig_node) |
664 | orig_node_free_ref(orig_node); | |
c6c8fea2 SE |
665 | return NETDEV_TX_OK; |
666 | } | |
667 | ||
668 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 669 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
670 | int hdr_size) |
671 | { | |
672 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
673 | struct unicast_packet *unicast_packet; | |
674 | struct ethhdr *ethhdr; | |
675 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 676 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
677 | short vid = -1; |
678 | int ret; | |
679 | ||
680 | /* check if enough space is available for pulling, and pull */ | |
681 | if (!pskb_may_pull(skb, hdr_size)) | |
682 | goto dropped; | |
683 | ||
684 | skb_pull_rcsum(skb, hdr_size); | |
685 | skb_reset_mac_header(skb); | |
686 | ||
687 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
688 | ||
689 | switch (ntohs(ethhdr->h_proto)) { | |
690 | case ETH_P_8021Q: | |
691 | vhdr = (struct vlan_ethhdr *)skb->data; | |
692 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
693 | ||
694 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
695 | break; | |
696 | ||
697 | /* fall through */ | |
698 | case ETH_P_BATMAN: | |
699 | goto dropped; | |
700 | } | |
701 | ||
702 | /** | |
703 | * if we have a another chosen mesh exit node in range | |
704 | * it will transport the packets to the non-mesh network | |
705 | */ | |
61906ae8 ML |
706 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
707 | if (curr_softif_neigh) { | |
c6c8fea2 SE |
708 | skb_push(skb, hdr_size); |
709 | unicast_packet = (struct unicast_packet *)skb->data; | |
710 | ||
711 | if ((unicast_packet->packet_type != BAT_UNICAST) && | |
712 | (unicast_packet->packet_type != BAT_UNICAST_FRAG)) | |
713 | goto dropped; | |
714 | ||
715 | skb_reset_mac_header(skb); | |
716 | ||
717 | memcpy(unicast_packet->dest, | |
ba85fac2 | 718 | curr_softif_neigh->addr, ETH_ALEN); |
7cefb149 | 719 | ret = route_unicast_packet(skb, recv_if); |
c6c8fea2 SE |
720 | if (ret == NET_RX_DROP) |
721 | goto dropped; | |
722 | ||
723 | goto out; | |
724 | } | |
725 | ||
726 | /* skb->dev & skb->pkt_type are set here */ | |
727 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
728 | goto dropped; | |
729 | skb->protocol = eth_type_trans(skb, soft_iface); | |
730 | ||
25985edc | 731 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 SE |
732 | * TODO: please verify this and remove this TODO |
733 | * -- Dec 21st 2009, Simon Wunderlich */ | |
734 | ||
735 | /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ | |
736 | ||
737 | bat_priv->stats.rx_packets++; | |
738 | bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr); | |
739 | ||
740 | soft_iface->last_rx = jiffies; | |
741 | ||
742 | netif_rx(skb); | |
ba85fac2 | 743 | goto out; |
c6c8fea2 SE |
744 | |
745 | dropped: | |
746 | kfree_skb(skb); | |
747 | out: | |
ba85fac2 SW |
748 | if (curr_softif_neigh) |
749 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
750 | return; |
751 | } | |
752 | ||
753 | #ifdef HAVE_NET_DEVICE_OPS | |
754 | static const struct net_device_ops bat_netdev_ops = { | |
755 | .ndo_open = interface_open, | |
756 | .ndo_stop = interface_release, | |
757 | .ndo_get_stats = interface_stats, | |
758 | .ndo_set_mac_address = interface_set_mac_addr, | |
759 | .ndo_change_mtu = interface_change_mtu, | |
760 | .ndo_start_xmit = interface_tx, | |
761 | .ndo_validate_addr = eth_validate_addr | |
762 | }; | |
763 | #endif | |
764 | ||
765 | static void interface_setup(struct net_device *dev) | |
766 | { | |
767 | struct bat_priv *priv = netdev_priv(dev); | |
768 | char dev_addr[ETH_ALEN]; | |
769 | ||
770 | ether_setup(dev); | |
771 | ||
772 | #ifdef HAVE_NET_DEVICE_OPS | |
773 | dev->netdev_ops = &bat_netdev_ops; | |
774 | #else | |
775 | dev->open = interface_open; | |
776 | dev->stop = interface_release; | |
777 | dev->get_stats = interface_stats; | |
778 | dev->set_mac_address = interface_set_mac_addr; | |
779 | dev->change_mtu = interface_change_mtu; | |
780 | dev->hard_start_xmit = interface_tx; | |
781 | #endif | |
782 | dev->destructor = free_netdev; | |
af20b710 | 783 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
784 | |
785 | /** | |
786 | * can't call min_mtu, because the needed variables | |
787 | * have not been initialized yet | |
788 | */ | |
789 | dev->mtu = ETH_DATA_LEN; | |
6e215fd8 SE |
790 | /* reserve more space in the skbuff for our header */ |
791 | dev->hard_header_len = BAT_HEADER_LEN; | |
c6c8fea2 SE |
792 | |
793 | /* generate random address */ | |
794 | random_ether_addr(dev_addr); | |
795 | memcpy(dev->dev_addr, dev_addr, ETH_ALEN); | |
796 | ||
797 | SET_ETHTOOL_OPS(dev, &bat_ethtool_ops); | |
798 | ||
704509b8 | 799 | memset(priv, 0, sizeof(*priv)); |
c6c8fea2 SE |
800 | } |
801 | ||
747e4221 | 802 | struct net_device *softif_create(const char *name) |
c6c8fea2 SE |
803 | { |
804 | struct net_device *soft_iface; | |
805 | struct bat_priv *bat_priv; | |
806 | int ret; | |
807 | ||
704509b8 | 808 | soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup); |
c6c8fea2 SE |
809 | |
810 | if (!soft_iface) { | |
811 | pr_err("Unable to allocate the batman interface: %s\n", name); | |
812 | goto out; | |
813 | } | |
814 | ||
c3caf519 | 815 | ret = register_netdevice(soft_iface); |
c6c8fea2 SE |
816 | if (ret < 0) { |
817 | pr_err("Unable to register the batman interface '%s': %i\n", | |
818 | name, ret); | |
819 | goto free_soft_iface; | |
820 | } | |
821 | ||
822 | bat_priv = netdev_priv(soft_iface); | |
823 | ||
824 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
825 | atomic_set(&bat_priv->bonding, 0); | |
826 | atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); | |
827 | atomic_set(&bat_priv->gw_mode, GW_MODE_OFF); | |
828 | atomic_set(&bat_priv->gw_sel_class, 20); | |
829 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
830 | atomic_set(&bat_priv->orig_interval, 1000); | |
831 | atomic_set(&bat_priv->hop_penalty, 10); | |
832 | atomic_set(&bat_priv->log_level, 0); | |
833 | atomic_set(&bat_priv->fragmentation, 1); | |
834 | atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN); | |
835 | atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN); | |
836 | ||
837 | atomic_set(&bat_priv->mesh_state, MESH_INACTIVE); | |
838 | atomic_set(&bat_priv->bcast_seqno, 1); | |
a73105b8 AQ |
839 | atomic_set(&bat_priv->ttvn, 0); |
840 | atomic_set(&bat_priv->tt_local_changes, 0); | |
841 | atomic_set(&bat_priv->tt_ogm_append_cnt, 0); | |
842 | ||
843 | bat_priv->tt_buff = NULL; | |
844 | bat_priv->tt_buff_len = 0; | |
cc47f66e | 845 | bat_priv->tt_poss_change = false; |
c6c8fea2 SE |
846 | |
847 | bat_priv->primary_if = NULL; | |
848 | bat_priv->num_ifaces = 0; | |
c6c8fea2 SE |
849 | |
850 | ret = sysfs_add_meshif(soft_iface); | |
851 | if (ret < 0) | |
852 | goto unreg_soft_iface; | |
853 | ||
854 | ret = debugfs_add_meshif(soft_iface); | |
855 | if (ret < 0) | |
856 | goto unreg_sysfs; | |
857 | ||
858 | ret = mesh_init(soft_iface); | |
859 | if (ret < 0) | |
860 | goto unreg_debugfs; | |
861 | ||
862 | return soft_iface; | |
863 | ||
864 | unreg_debugfs: | |
865 | debugfs_del_meshif(soft_iface); | |
866 | unreg_sysfs: | |
867 | sysfs_del_meshif(soft_iface); | |
868 | unreg_soft_iface: | |
869 | unregister_netdev(soft_iface); | |
870 | return NULL; | |
871 | ||
872 | free_soft_iface: | |
873 | free_netdev(soft_iface); | |
874 | out: | |
875 | return NULL; | |
876 | } | |
877 | ||
878 | void softif_destroy(struct net_device *soft_iface) | |
879 | { | |
880 | debugfs_del_meshif(soft_iface); | |
881 | sysfs_del_meshif(soft_iface); | |
882 | mesh_free(soft_iface); | |
883 | unregister_netdevice(soft_iface); | |
884 | } | |
885 | ||
747e4221 | 886 | int softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 SE |
887 | { |
888 | #ifdef HAVE_NET_DEVICE_OPS | |
889 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
890 | return 1; | |
891 | #else | |
892 | if (net_dev->hard_start_xmit == interface_tx) | |
893 | return 1; | |
894 | #endif | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
c6c8fea2 SE |
899 | /* ethtool */ |
900 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
901 | { | |
902 | cmd->supported = 0; | |
903 | cmd->advertising = 0; | |
70739497 | 904 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
905 | cmd->duplex = DUPLEX_FULL; |
906 | cmd->port = PORT_TP; | |
907 | cmd->phy_address = 0; | |
908 | cmd->transceiver = XCVR_INTERNAL; | |
909 | cmd->autoneg = AUTONEG_DISABLE; | |
910 | cmd->maxtxpkt = 0; | |
911 | cmd->maxrxpkt = 0; | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static void bat_get_drvinfo(struct net_device *dev, | |
917 | struct ethtool_drvinfo *info) | |
918 | { | |
919 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
920 | strcpy(info->version, SOURCE_VERSION); | |
921 | strcpy(info->fw_version, "N/A"); | |
922 | strcpy(info->bus_info, "batman"); | |
923 | } | |
924 | ||
925 | static u32 bat_get_msglevel(struct net_device *dev) | |
926 | { | |
927 | return -EOPNOTSUPP; | |
928 | } | |
929 | ||
930 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
931 | { | |
932 | } | |
933 | ||
934 | static u32 bat_get_link(struct net_device *dev) | |
935 | { | |
936 | return 1; | |
937 | } |