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 SE |
32 | #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" | |
c6c8fea2 SE |
38 | |
39 | ||
40 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
41 | static void bat_get_drvinfo(struct net_device *dev, | |
42 | struct ethtool_drvinfo *info); | |
43 | static u32 bat_get_msglevel(struct net_device *dev); | |
44 | static void bat_set_msglevel(struct net_device *dev, u32 value); | |
45 | static u32 bat_get_link(struct net_device *dev); | |
c6c8fea2 SE |
46 | |
47 | static 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, | |
c6c8fea2 SE |
53 | }; |
54 | ||
55 | int 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 | ||
7d2b5548 | 75 | static void softif_neigh_free_ref(struct softif_neigh *softif_neigh) |
c6c8fea2 | 76 | { |
7d2b5548 | 77 | if (atomic_dec_and_test(&softif_neigh->refcount)) |
8e3572cf | 78 | kfree_rcu(softif_neigh, rcu); |
c6c8fea2 SE |
79 | } |
80 | ||
61906ae8 | 81 | static void softif_neigh_vid_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 82 | { |
61906ae8 ML |
83 | struct softif_neigh_vid *softif_neigh_vid; |
84 | struct softif_neigh *softif_neigh; | |
c6c8fea2 | 85 | struct hlist_node *node, *node_tmp; |
61906ae8 | 86 | struct bat_priv *bat_priv; |
c6c8fea2 | 87 | |
61906ae8 ML |
88 | softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu); |
89 | bat_priv = softif_neigh_vid->bat_priv; | |
c6c8fea2 | 90 | |
ba85fac2 | 91 | spin_lock_bh(&bat_priv->softif_neigh_lock); |
c6c8fea2 | 92 | hlist_for_each_entry_safe(softif_neigh, node, node_tmp, |
61906ae8 ML |
93 | &softif_neigh_vid->softif_neigh_list, list) { |
94 | hlist_del_rcu(&softif_neigh->list); | |
95 | softif_neigh_free_ref(softif_neigh); | |
96 | } | |
ba85fac2 | 97 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
c6c8fea2 | 98 | |
61906ae8 | 99 | kfree(softif_neigh_vid); |
ba85fac2 | 100 | } |
c6c8fea2 | 101 | |
61906ae8 | 102 | static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid) |
ba85fac2 | 103 | { |
61906ae8 ML |
104 | if (atomic_dec_and_test(&softif_neigh_vid->refcount)) |
105 | call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu); | |
ba85fac2 | 106 | } |
c6c8fea2 | 107 | |
61906ae8 ML |
108 | static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv, |
109 | short vid) | |
c6c8fea2 | 110 | { |
61906ae8 ML |
111 | struct softif_neigh_vid *softif_neigh_vid; |
112 | struct hlist_node *node; | |
c6c8fea2 | 113 | |
61906ae8 ML |
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) | |
c6c8fea2 SE |
118 | continue; |
119 | ||
61906ae8 ML |
120 | if (!atomic_inc_not_zero(&softif_neigh_vid->refcount)) |
121 | continue; | |
c6c8fea2 | 122 | |
61906ae8 | 123 | goto out; |
c6c8fea2 SE |
124 | } |
125 | ||
704509b8 | 126 | softif_neigh_vid = kzalloc(sizeof(*softif_neigh_vid), GFP_ATOMIC); |
61906ae8 ML |
127 | if (!softif_neigh_vid) |
128 | goto out; | |
ba85fac2 | 129 | |
61906ae8 ML |
130 | softif_neigh_vid->vid = vid; |
131 | softif_neigh_vid->bat_priv = bat_priv; | |
ba85fac2 | 132 | |
61906ae8 ML |
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 | ||
142 | out: | |
143 | rcu_read_unlock(); | |
144 | return softif_neigh_vid; | |
c6c8fea2 SE |
145 | } |
146 | ||
147 | static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv, | |
747e4221 | 148 | const uint8_t *addr, short vid) |
c6c8fea2 | 149 | { |
61906ae8 ML |
150 | struct softif_neigh_vid *softif_neigh_vid; |
151 | struct softif_neigh *softif_neigh = NULL; | |
c6c8fea2 SE |
152 | struct hlist_node *node; |
153 | ||
61906ae8 ML |
154 | softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid); |
155 | if (!softif_neigh_vid) | |
156 | goto out; | |
157 | ||
c6c8fea2 SE |
158 | rcu_read_lock(); |
159 | hlist_for_each_entry_rcu(softif_neigh, node, | |
61906ae8 ML |
160 | &softif_neigh_vid->softif_neigh_list, |
161 | list) { | |
39901e71 | 162 | if (!compare_eth(softif_neigh->addr, addr)) |
c6c8fea2 SE |
163 | continue; |
164 | ||
7d2b5548 ML |
165 | if (!atomic_inc_not_zero(&softif_neigh->refcount)) |
166 | continue; | |
167 | ||
c6c8fea2 | 168 | softif_neigh->last_seen = jiffies; |
61906ae8 | 169 | goto unlock; |
c6c8fea2 SE |
170 | } |
171 | ||
704509b8 | 172 | softif_neigh = kzalloc(sizeof(*softif_neigh), GFP_ATOMIC); |
c6c8fea2 | 173 | if (!softif_neigh) |
61906ae8 | 174 | goto unlock; |
c6c8fea2 SE |
175 | |
176 | memcpy(softif_neigh->addr, addr, ETH_ALEN); | |
c6c8fea2 | 177 | softif_neigh->last_seen = jiffies; |
7d2b5548 ML |
178 | /* initialize with 2 - caller decrements counter by one */ |
179 | atomic_set(&softif_neigh->refcount, 2); | |
c6c8fea2 SE |
180 | |
181 | INIT_HLIST_NODE(&softif_neigh->list); | |
182 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
61906ae8 ML |
183 | hlist_add_head_rcu(&softif_neigh->list, |
184 | &softif_neigh_vid->softif_neigh_list); | |
c6c8fea2 SE |
185 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
186 | ||
61906ae8 ML |
187 | unlock: |
188 | rcu_read_unlock(); | |
c6c8fea2 | 189 | out: |
61906ae8 ML |
190 | if (softif_neigh_vid) |
191 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
192 | return softif_neigh; | |
193 | } | |
194 | ||
195 | static 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 | ||
c6c8fea2 SE |
206 | rcu_read_unlock(); |
207 | return softif_neigh; | |
208 | } | |
209 | ||
61906ae8 ML |
210 | static 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); | |
222 | out: | |
223 | if (softif_neigh_vid) | |
224 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
225 | return softif_neigh; | |
226 | } | |
227 | ||
228 | static 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 | ||
244 | curr_neigh = softif_neigh_vid->softif_neigh; | |
245 | rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh); | |
246 | ||
247 | if ((curr_neigh) && (!new_neigh)) | |
248 | bat_dbg(DBG_ROUTES, bat_priv, | |
249 | "Removing mesh exit point on vid: %d (prev: %pM).\n", | |
250 | vid, curr_neigh->addr); | |
251 | else if ((curr_neigh) && (new_neigh)) | |
252 | bat_dbg(DBG_ROUTES, bat_priv, | |
253 | "Changing mesh exit point on vid: %d from %pM " | |
254 | "to %pM.\n", vid, curr_neigh->addr, new_neigh->addr); | |
255 | else if ((!curr_neigh) && (new_neigh)) | |
256 | bat_dbg(DBG_ROUTES, bat_priv, | |
257 | "Setting mesh exit point on vid: %d to %pM.\n", | |
258 | vid, new_neigh->addr); | |
259 | ||
260 | if (curr_neigh) | |
261 | softif_neigh_free_ref(curr_neigh); | |
262 | ||
263 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
264 | ||
265 | out: | |
266 | if (softif_neigh_vid) | |
267 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
268 | } | |
269 | ||
270 | static void softif_neigh_vid_deselect(struct bat_priv *bat_priv, | |
271 | struct softif_neigh_vid *softif_neigh_vid) | |
272 | { | |
273 | struct softif_neigh *curr_neigh; | |
274 | struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp; | |
275 | struct hard_iface *primary_if = NULL; | |
276 | struct hlist_node *node; | |
277 | ||
278 | primary_if = primary_if_get_selected(bat_priv); | |
279 | if (!primary_if) | |
280 | goto out; | |
281 | ||
282 | /* find new softif_neigh immediately to avoid temporary loops */ | |
283 | rcu_read_lock(); | |
284 | curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh); | |
285 | ||
286 | hlist_for_each_entry_rcu(softif_neigh_tmp, node, | |
287 | &softif_neigh_vid->softif_neigh_list, | |
288 | list) { | |
289 | if (softif_neigh_tmp == curr_neigh) | |
290 | continue; | |
291 | ||
292 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
293 | if (memcmp(primary_if->net_dev->dev_addr, | |
294 | softif_neigh_tmp->addr, ETH_ALEN) < 0) | |
295 | continue; | |
296 | ||
297 | if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount)) | |
298 | continue; | |
299 | ||
300 | softif_neigh = softif_neigh_tmp; | |
301 | goto unlock; | |
302 | } | |
303 | ||
304 | unlock: | |
305 | rcu_read_unlock(); | |
306 | out: | |
307 | softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid); | |
308 | ||
309 | if (primary_if) | |
310 | hardif_free_ref(primary_if); | |
311 | if (softif_neigh) | |
312 | softif_neigh_free_ref(softif_neigh); | |
313 | } | |
314 | ||
c6c8fea2 SE |
315 | int softif_neigh_seq_print_text(struct seq_file *seq, void *offset) |
316 | { | |
317 | struct net_device *net_dev = (struct net_device *)seq->private; | |
318 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
61906ae8 | 319 | struct softif_neigh_vid *softif_neigh_vid; |
c6c8fea2 | 320 | struct softif_neigh *softif_neigh; |
32ae9b22 | 321 | struct hard_iface *primary_if; |
61906ae8 | 322 | struct hlist_node *node, *node_tmp; |
ba85fac2 | 323 | struct softif_neigh *curr_softif_neigh; |
61906ae8 | 324 | int ret = 0, last_seen_secs, last_seen_msecs; |
c6c8fea2 | 325 | |
32ae9b22 ML |
326 | primary_if = primary_if_get_selected(bat_priv); |
327 | if (!primary_if) { | |
328 | ret = seq_printf(seq, "BATMAN mesh %s disabled - " | |
329 | "please specify interfaces to enable it\n", | |
330 | net_dev->name); | |
331 | goto out; | |
332 | } | |
c6c8fea2 | 333 | |
32ae9b22 ML |
334 | if (primary_if->if_status != IF_ACTIVE) { |
335 | ret = seq_printf(seq, "BATMAN mesh %s " | |
336 | "disabled - primary interface not active\n", | |
337 | net_dev->name); | |
338 | goto out; | |
c6c8fea2 SE |
339 | } |
340 | ||
341 | seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name); | |
342 | ||
c6c8fea2 | 343 | rcu_read_lock(); |
61906ae8 ML |
344 | hlist_for_each_entry_rcu(softif_neigh_vid, node, |
345 | &bat_priv->softif_neigh_vids, list) { | |
346 | seq_printf(seq, " %-15s %s on vid: %d\n", | |
347 | "Originator", "last-seen", softif_neigh_vid->vid); | |
348 | ||
349 | curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid); | |
350 | ||
351 | hlist_for_each_entry_rcu(softif_neigh, node_tmp, | |
352 | &softif_neigh_vid->softif_neigh_list, | |
353 | list) { | |
354 | last_seen_secs = jiffies_to_msecs(jiffies - | |
355 | softif_neigh->last_seen) / 1000; | |
356 | last_seen_msecs = jiffies_to_msecs(jiffies - | |
357 | softif_neigh->last_seen) % 1000; | |
358 | seq_printf(seq, "%s %pM %3i.%03is\n", | |
359 | curr_softif_neigh == softif_neigh | |
360 | ? "=>" : " ", softif_neigh->addr, | |
361 | last_seen_secs, last_seen_msecs); | |
362 | } | |
363 | ||
364 | if (curr_softif_neigh) | |
365 | softif_neigh_free_ref(curr_softif_neigh); | |
366 | ||
367 | seq_printf(seq, "\n"); | |
368 | } | |
c6c8fea2 SE |
369 | rcu_read_unlock(); |
370 | ||
32ae9b22 ML |
371 | out: |
372 | if (primary_if) | |
373 | hardif_free_ref(primary_if); | |
374 | return ret; | |
c6c8fea2 SE |
375 | } |
376 | ||
61906ae8 ML |
377 | void softif_neigh_purge(struct bat_priv *bat_priv) |
378 | { | |
379 | struct softif_neigh *softif_neigh, *curr_softif_neigh; | |
380 | struct softif_neigh_vid *softif_neigh_vid; | |
381 | struct hlist_node *node, *node_tmp, *node_tmp2; | |
382 | char do_deselect; | |
383 | ||
384 | rcu_read_lock(); | |
385 | hlist_for_each_entry_rcu(softif_neigh_vid, node, | |
386 | &bat_priv->softif_neigh_vids, list) { | |
387 | if (!atomic_inc_not_zero(&softif_neigh_vid->refcount)) | |
388 | continue; | |
389 | ||
390 | curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid); | |
391 | do_deselect = 0; | |
392 | ||
393 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
394 | hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2, | |
395 | &softif_neigh_vid->softif_neigh_list, | |
396 | list) { | |
397 | if ((!time_after(jiffies, softif_neigh->last_seen + | |
398 | msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) && | |
399 | (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)) | |
400 | continue; | |
401 | ||
402 | if (curr_softif_neigh == softif_neigh) { | |
403 | bat_dbg(DBG_ROUTES, bat_priv, | |
404 | "Current mesh exit point on vid: %d " | |
405 | "'%pM' vanished.\n", | |
406 | softif_neigh_vid->vid, | |
407 | softif_neigh->addr); | |
408 | do_deselect = 1; | |
409 | } | |
410 | ||
411 | hlist_del_rcu(&softif_neigh->list); | |
412 | softif_neigh_free_ref(softif_neigh); | |
413 | } | |
414 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
415 | ||
416 | /* soft_neigh_vid_deselect() needs to acquire the | |
417 | * softif_neigh_lock */ | |
418 | if (do_deselect) | |
419 | softif_neigh_vid_deselect(bat_priv, softif_neigh_vid); | |
420 | ||
421 | if (curr_softif_neigh) | |
422 | softif_neigh_free_ref(curr_softif_neigh); | |
423 | ||
424 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
425 | } | |
426 | rcu_read_unlock(); | |
427 | ||
428 | spin_lock_bh(&bat_priv->softif_neigh_vid_lock); | |
429 | hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp, | |
430 | &bat_priv->softif_neigh_vids, list) { | |
431 | if (!hlist_empty(&softif_neigh_vid->softif_neigh_list)) | |
432 | continue; | |
433 | ||
434 | hlist_del_rcu(&softif_neigh_vid->list); | |
435 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
436 | } | |
437 | spin_unlock_bh(&bat_priv->softif_neigh_vid_lock); | |
438 | ||
c6c8fea2 SE |
439 | } |
440 | ||
441 | static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev, | |
442 | short vid) | |
443 | { | |
444 | struct bat_priv *bat_priv = netdev_priv(dev); | |
445 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
446 | struct batman_packet *batman_packet; | |
32ae9b22 ML |
447 | struct softif_neigh *softif_neigh = NULL; |
448 | struct hard_iface *primary_if = NULL; | |
ba85fac2 | 449 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
450 | |
451 | if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) | |
452 | batman_packet = (struct batman_packet *) | |
453 | (skb->data + ETH_HLEN + VLAN_HLEN); | |
454 | else | |
455 | batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN); | |
456 | ||
457 | if (batman_packet->version != COMPAT_VERSION) | |
32ae9b22 | 458 | goto out; |
c6c8fea2 SE |
459 | |
460 | if (batman_packet->packet_type != BAT_PACKET) | |
32ae9b22 | 461 | goto out; |
c6c8fea2 SE |
462 | |
463 | if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) | |
32ae9b22 | 464 | goto out; |
c6c8fea2 SE |
465 | |
466 | if (is_my_mac(batman_packet->orig)) | |
32ae9b22 | 467 | goto out; |
c6c8fea2 SE |
468 | |
469 | softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); | |
c6c8fea2 | 470 | if (!softif_neigh) |
32ae9b22 | 471 | goto out; |
c6c8fea2 | 472 | |
61906ae8 | 473 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
ba85fac2 | 474 | if (curr_softif_neigh == softif_neigh) |
c6c8fea2 SE |
475 | goto out; |
476 | ||
32ae9b22 ML |
477 | primary_if = primary_if_get_selected(bat_priv); |
478 | if (!primary_if) | |
c6c8fea2 SE |
479 | goto out; |
480 | ||
481 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
32ae9b22 | 482 | if (memcmp(primary_if->net_dev->dev_addr, |
c6c8fea2 SE |
483 | softif_neigh->addr, ETH_ALEN) < 0) |
484 | goto out; | |
485 | ||
c6c8fea2 | 486 | /* close own batX device and use softif_neigh as exit node */ |
61906ae8 ML |
487 | if (!curr_softif_neigh) { |
488 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
ba85fac2 | 489 | goto out; |
c6c8fea2 SE |
490 | } |
491 | ||
61906ae8 ML |
492 | /* switch to new 'smallest neighbor' */ |
493 | if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0) | |
494 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
495 | ||
c6c8fea2 | 496 | out: |
c6c8fea2 | 497 | kfree_skb(skb); |
32ae9b22 ML |
498 | if (softif_neigh) |
499 | softif_neigh_free_ref(softif_neigh); | |
ba85fac2 SW |
500 | if (curr_softif_neigh) |
501 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
502 | if (primary_if) |
503 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
504 | return; |
505 | } | |
506 | ||
507 | static int interface_open(struct net_device *dev) | |
508 | { | |
509 | netif_start_queue(dev); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static int interface_release(struct net_device *dev) | |
514 | { | |
515 | netif_stop_queue(dev); | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static struct net_device_stats *interface_stats(struct net_device *dev) | |
520 | { | |
521 | struct bat_priv *bat_priv = netdev_priv(dev); | |
522 | return &bat_priv->stats; | |
523 | } | |
524 | ||
525 | static int interface_set_mac_addr(struct net_device *dev, void *p) | |
526 | { | |
527 | struct bat_priv *bat_priv = netdev_priv(dev); | |
528 | struct sockaddr *addr = p; | |
529 | ||
530 | if (!is_valid_ether_addr(addr->sa_data)) | |
531 | return -EADDRNOTAVAIL; | |
532 | ||
2dafb49d | 533 | /* only modify transtable if it has been initialised before */ |
c6c8fea2 | 534 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { |
2dafb49d | 535 | tt_local_remove(bat_priv, dev->dev_addr, |
c6c8fea2 | 536 | "mac address changed"); |
2dafb49d | 537 | tt_local_add(dev, addr->sa_data); |
c6c8fea2 SE |
538 | } |
539 | ||
540 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static int interface_change_mtu(struct net_device *dev, int new_mtu) | |
545 | { | |
546 | /* check ranges */ | |
547 | if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev))) | |
548 | return -EINVAL; | |
549 | ||
550 | dev->mtu = new_mtu; | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) | |
556 | { | |
557 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
558 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
32ae9b22 | 559 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
560 | struct bcast_packet *bcast_packet; |
561 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 562 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
563 | int data_len = skb->len, ret; |
564 | short vid = -1; | |
565 | bool do_bcast = false; | |
566 | ||
567 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) | |
568 | goto dropped; | |
569 | ||
570 | soft_iface->trans_start = jiffies; | |
571 | ||
572 | switch (ntohs(ethhdr->h_proto)) { | |
573 | case ETH_P_8021Q: | |
574 | vhdr = (struct vlan_ethhdr *)skb->data; | |
575 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
576 | ||
577 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
578 | break; | |
579 | ||
580 | /* fall through */ | |
581 | case ETH_P_BATMAN: | |
582 | softif_batman_recv(skb, soft_iface, vid); | |
583 | goto end; | |
584 | } | |
585 | ||
586 | /** | |
587 | * if we have a another chosen mesh exit node in range | |
588 | * it will transport the packets to the mesh | |
589 | */ | |
61906ae8 ML |
590 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
591 | if (curr_softif_neigh) | |
c6c8fea2 SE |
592 | goto dropped; |
593 | ||
594 | /* TODO: check this for locks */ | |
2dafb49d | 595 | tt_local_add(soft_iface, ethhdr->h_source); |
c6c8fea2 SE |
596 | |
597 | if (is_multicast_ether_addr(ethhdr->h_dest)) { | |
598 | ret = gw_is_target(bat_priv, skb); | |
599 | ||
600 | if (ret < 0) | |
601 | goto dropped; | |
602 | ||
603 | if (ret == 0) | |
604 | do_bcast = true; | |
605 | } | |
606 | ||
607 | /* ethernet packet should be broadcasted */ | |
608 | if (do_bcast) { | |
32ae9b22 ML |
609 | primary_if = primary_if_get_selected(bat_priv); |
610 | if (!primary_if) | |
c6c8fea2 SE |
611 | goto dropped; |
612 | ||
704509b8 | 613 | if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
614 | goto dropped; |
615 | ||
616 | bcast_packet = (struct bcast_packet *)skb->data; | |
617 | bcast_packet->version = COMPAT_VERSION; | |
618 | bcast_packet->ttl = TTL; | |
619 | ||
620 | /* batman packet type: broadcast */ | |
621 | bcast_packet->packet_type = BAT_BCAST; | |
622 | ||
623 | /* hw address of first interface is the orig mac because only | |
624 | * this mac is known throughout the mesh */ | |
625 | memcpy(bcast_packet->orig, | |
32ae9b22 | 626 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
627 | |
628 | /* set broadcast sequence number */ | |
629 | bcast_packet->seqno = | |
630 | htonl(atomic_inc_return(&bat_priv->bcast_seqno)); | |
631 | ||
632 | add_bcast_packet_to_list(bat_priv, skb); | |
633 | ||
634 | /* a copy is stored in the bcast list, therefore removing | |
635 | * the original skb. */ | |
636 | kfree_skb(skb); | |
637 | ||
638 | /* unicast packet */ | |
639 | } else { | |
640 | ret = unicast_send_skb(skb, bat_priv); | |
641 | if (ret != 0) | |
642 | goto dropped_freed; | |
643 | } | |
644 | ||
645 | bat_priv->stats.tx_packets++; | |
646 | bat_priv->stats.tx_bytes += data_len; | |
647 | goto end; | |
648 | ||
649 | dropped: | |
650 | kfree_skb(skb); | |
651 | dropped_freed: | |
652 | bat_priv->stats.tx_dropped++; | |
653 | end: | |
ba85fac2 SW |
654 | if (curr_softif_neigh) |
655 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
656 | if (primary_if) |
657 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
658 | return NETDEV_TX_OK; |
659 | } | |
660 | ||
661 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 662 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
663 | int hdr_size) |
664 | { | |
665 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
666 | struct unicast_packet *unicast_packet; | |
667 | struct ethhdr *ethhdr; | |
668 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 669 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
670 | short vid = -1; |
671 | int ret; | |
672 | ||
673 | /* check if enough space is available for pulling, and pull */ | |
674 | if (!pskb_may_pull(skb, hdr_size)) | |
675 | goto dropped; | |
676 | ||
677 | skb_pull_rcsum(skb, hdr_size); | |
678 | skb_reset_mac_header(skb); | |
679 | ||
680 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
681 | ||
682 | switch (ntohs(ethhdr->h_proto)) { | |
683 | case ETH_P_8021Q: | |
684 | vhdr = (struct vlan_ethhdr *)skb->data; | |
685 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
686 | ||
687 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
688 | break; | |
689 | ||
690 | /* fall through */ | |
691 | case ETH_P_BATMAN: | |
692 | goto dropped; | |
693 | } | |
694 | ||
695 | /** | |
696 | * if we have a another chosen mesh exit node in range | |
697 | * it will transport the packets to the non-mesh network | |
698 | */ | |
61906ae8 ML |
699 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
700 | if (curr_softif_neigh) { | |
c6c8fea2 SE |
701 | skb_push(skb, hdr_size); |
702 | unicast_packet = (struct unicast_packet *)skb->data; | |
703 | ||
704 | if ((unicast_packet->packet_type != BAT_UNICAST) && | |
705 | (unicast_packet->packet_type != BAT_UNICAST_FRAG)) | |
706 | goto dropped; | |
707 | ||
708 | skb_reset_mac_header(skb); | |
709 | ||
710 | memcpy(unicast_packet->dest, | |
ba85fac2 | 711 | curr_softif_neigh->addr, ETH_ALEN); |
7cefb149 | 712 | ret = route_unicast_packet(skb, recv_if); |
c6c8fea2 SE |
713 | if (ret == NET_RX_DROP) |
714 | goto dropped; | |
715 | ||
716 | goto out; | |
717 | } | |
718 | ||
719 | /* skb->dev & skb->pkt_type are set here */ | |
720 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
721 | goto dropped; | |
722 | skb->protocol = eth_type_trans(skb, soft_iface); | |
723 | ||
25985edc | 724 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 SE |
725 | * TODO: please verify this and remove this TODO |
726 | * -- Dec 21st 2009, Simon Wunderlich */ | |
727 | ||
728 | /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ | |
729 | ||
730 | bat_priv->stats.rx_packets++; | |
731 | bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr); | |
732 | ||
733 | soft_iface->last_rx = jiffies; | |
734 | ||
735 | netif_rx(skb); | |
ba85fac2 | 736 | goto out; |
c6c8fea2 SE |
737 | |
738 | dropped: | |
739 | kfree_skb(skb); | |
740 | out: | |
ba85fac2 SW |
741 | if (curr_softif_neigh) |
742 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
743 | return; |
744 | } | |
745 | ||
746 | #ifdef HAVE_NET_DEVICE_OPS | |
747 | static const struct net_device_ops bat_netdev_ops = { | |
748 | .ndo_open = interface_open, | |
749 | .ndo_stop = interface_release, | |
750 | .ndo_get_stats = interface_stats, | |
751 | .ndo_set_mac_address = interface_set_mac_addr, | |
752 | .ndo_change_mtu = interface_change_mtu, | |
753 | .ndo_start_xmit = interface_tx, | |
754 | .ndo_validate_addr = eth_validate_addr | |
755 | }; | |
756 | #endif | |
757 | ||
758 | static void interface_setup(struct net_device *dev) | |
759 | { | |
760 | struct bat_priv *priv = netdev_priv(dev); | |
761 | char dev_addr[ETH_ALEN]; | |
762 | ||
763 | ether_setup(dev); | |
764 | ||
765 | #ifdef HAVE_NET_DEVICE_OPS | |
766 | dev->netdev_ops = &bat_netdev_ops; | |
767 | #else | |
768 | dev->open = interface_open; | |
769 | dev->stop = interface_release; | |
770 | dev->get_stats = interface_stats; | |
771 | dev->set_mac_address = interface_set_mac_addr; | |
772 | dev->change_mtu = interface_change_mtu; | |
773 | dev->hard_start_xmit = interface_tx; | |
774 | #endif | |
775 | dev->destructor = free_netdev; | |
af20b710 | 776 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
777 | |
778 | /** | |
779 | * can't call min_mtu, because the needed variables | |
780 | * have not been initialized yet | |
781 | */ | |
782 | dev->mtu = ETH_DATA_LEN; | |
6e215fd8 SE |
783 | /* reserve more space in the skbuff for our header */ |
784 | dev->hard_header_len = BAT_HEADER_LEN; | |
c6c8fea2 SE |
785 | |
786 | /* generate random address */ | |
787 | random_ether_addr(dev_addr); | |
788 | memcpy(dev->dev_addr, dev_addr, ETH_ALEN); | |
789 | ||
790 | SET_ETHTOOL_OPS(dev, &bat_ethtool_ops); | |
791 | ||
704509b8 | 792 | memset(priv, 0, sizeof(*priv)); |
c6c8fea2 SE |
793 | } |
794 | ||
747e4221 | 795 | struct net_device *softif_create(const char *name) |
c6c8fea2 SE |
796 | { |
797 | struct net_device *soft_iface; | |
798 | struct bat_priv *bat_priv; | |
799 | int ret; | |
800 | ||
704509b8 | 801 | soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup); |
c6c8fea2 SE |
802 | |
803 | if (!soft_iface) { | |
804 | pr_err("Unable to allocate the batman interface: %s\n", name); | |
805 | goto out; | |
806 | } | |
807 | ||
c3caf519 | 808 | ret = register_netdevice(soft_iface); |
c6c8fea2 SE |
809 | if (ret < 0) { |
810 | pr_err("Unable to register the batman interface '%s': %i\n", | |
811 | name, ret); | |
812 | goto free_soft_iface; | |
813 | } | |
814 | ||
815 | bat_priv = netdev_priv(soft_iface); | |
816 | ||
817 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
818 | atomic_set(&bat_priv->bonding, 0); | |
819 | 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); | |
2dafb49d | 832 | atomic_set(&bat_priv->tt_local_changed, 0); |
c6c8fea2 SE |
833 | |
834 | bat_priv->primary_if = NULL; | |
835 | bat_priv->num_ifaces = 0; | |
c6c8fea2 SE |
836 | |
837 | ret = sysfs_add_meshif(soft_iface); | |
838 | if (ret < 0) | |
839 | goto unreg_soft_iface; | |
840 | ||
841 | ret = debugfs_add_meshif(soft_iface); | |
842 | if (ret < 0) | |
843 | goto unreg_sysfs; | |
844 | ||
845 | ret = mesh_init(soft_iface); | |
846 | if (ret < 0) | |
847 | goto unreg_debugfs; | |
848 | ||
849 | return soft_iface; | |
850 | ||
851 | unreg_debugfs: | |
852 | debugfs_del_meshif(soft_iface); | |
853 | unreg_sysfs: | |
854 | sysfs_del_meshif(soft_iface); | |
855 | unreg_soft_iface: | |
856 | unregister_netdev(soft_iface); | |
857 | return NULL; | |
858 | ||
859 | free_soft_iface: | |
860 | free_netdev(soft_iface); | |
861 | out: | |
862 | return NULL; | |
863 | } | |
864 | ||
865 | void softif_destroy(struct net_device *soft_iface) | |
866 | { | |
867 | debugfs_del_meshif(soft_iface); | |
868 | sysfs_del_meshif(soft_iface); | |
869 | mesh_free(soft_iface); | |
870 | unregister_netdevice(soft_iface); | |
871 | } | |
872 | ||
747e4221 | 873 | int softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 SE |
874 | { |
875 | #ifdef HAVE_NET_DEVICE_OPS | |
876 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
877 | return 1; | |
878 | #else | |
879 | if (net_dev->hard_start_xmit == interface_tx) | |
880 | return 1; | |
881 | #endif | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
c6c8fea2 SE |
886 | /* ethtool */ |
887 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
888 | { | |
889 | cmd->supported = 0; | |
890 | cmd->advertising = 0; | |
70739497 | 891 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
892 | cmd->duplex = DUPLEX_FULL; |
893 | cmd->port = PORT_TP; | |
894 | cmd->phy_address = 0; | |
895 | cmd->transceiver = XCVR_INTERNAL; | |
896 | cmd->autoneg = AUTONEG_DISABLE; | |
897 | cmd->maxtxpkt = 0; | |
898 | cmd->maxrxpkt = 0; | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | static void bat_get_drvinfo(struct net_device *dev, | |
904 | struct ethtool_drvinfo *info) | |
905 | { | |
906 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
907 | strcpy(info->version, SOURCE_VERSION); | |
908 | strcpy(info->fw_version, "N/A"); | |
909 | strcpy(info->bus_info, "batman"); | |
910 | } | |
911 | ||
912 | static u32 bat_get_msglevel(struct net_device *dev) | |
913 | { | |
914 | return -EOPNOTSUPP; | |
915 | } | |
916 | ||
917 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
918 | { | |
919 | } | |
920 | ||
921 | static u32 bat_get_link(struct net_device *dev) | |
922 | { | |
923 | return 1; | |
924 | } |