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 | ||
61906ae8 ML |
126 | softif_neigh_vid = kzalloc(sizeof(struct softif_neigh_vid), |
127 | GFP_ATOMIC); | |
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, | |
149 | uint8_t *addr, short vid) | |
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 | ||
173 | softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC); | |
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 | ||
245 | curr_neigh = softif_neigh_vid->softif_neigh; | |
246 | 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 | ||
264 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
265 | ||
266 | out: | |
267 | if (softif_neigh_vid) | |
268 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
269 | } | |
270 | ||
271 | static 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 | ||
305 | unlock: | |
306 | rcu_read_unlock(); | |
307 | out: | |
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); | |
314 | } | |
315 | ||
c6c8fea2 SE |
316 | int 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); | |
61906ae8 | 320 | struct softif_neigh_vid *softif_neigh_vid; |
c6c8fea2 | 321 | struct softif_neigh *softif_neigh; |
32ae9b22 | 322 | struct hard_iface *primary_if; |
61906ae8 | 323 | struct hlist_node *node, *node_tmp; |
ba85fac2 | 324 | struct softif_neigh *curr_softif_neigh; |
61906ae8 | 325 | int ret = 0, last_seen_secs, last_seen_msecs; |
c6c8fea2 | 326 | |
32ae9b22 ML |
327 | 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 | } | |
c6c8fea2 | 334 | |
32ae9b22 ML |
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; | |
c6c8fea2 SE |
340 | } |
341 | ||
342 | seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name); | |
343 | ||
c6c8fea2 | 344 | rcu_read_lock(); |
61906ae8 ML |
345 | 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 | } | |
c6c8fea2 SE |
370 | rcu_read_unlock(); |
371 | ||
32ae9b22 ML |
372 | out: |
373 | if (primary_if) | |
374 | hardif_free_ref(primary_if); | |
375 | return ret; | |
c6c8fea2 SE |
376 | } |
377 | ||
61906ae8 ML |
378 | void 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; | |
383 | char do_deselect; | |
384 | ||
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 | ||
c6c8fea2 SE |
440 | } |
441 | ||
442 | static 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; | |
32ae9b22 ML |
448 | struct softif_neigh *softif_neigh = NULL; |
449 | struct hard_iface *primary_if = NULL; | |
ba85fac2 | 450 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
451 | |
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) | |
32ae9b22 | 459 | goto out; |
c6c8fea2 SE |
460 | |
461 | if (batman_packet->packet_type != BAT_PACKET) | |
32ae9b22 | 462 | goto out; |
c6c8fea2 SE |
463 | |
464 | if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) | |
32ae9b22 | 465 | goto out; |
c6c8fea2 SE |
466 | |
467 | if (is_my_mac(batman_packet->orig)) | |
32ae9b22 | 468 | goto out; |
c6c8fea2 SE |
469 | |
470 | softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); | |
c6c8fea2 | 471 | if (!softif_neigh) |
32ae9b22 | 472 | goto out; |
c6c8fea2 | 473 | |
61906ae8 | 474 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
ba85fac2 | 475 | if (curr_softif_neigh == softif_neigh) |
c6c8fea2 SE |
476 | goto out; |
477 | ||
32ae9b22 ML |
478 | primary_if = primary_if_get_selected(bat_priv); |
479 | if (!primary_if) | |
c6c8fea2 SE |
480 | goto out; |
481 | ||
482 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
32ae9b22 | 483 | if (memcmp(primary_if->net_dev->dev_addr, |
c6c8fea2 SE |
484 | softif_neigh->addr, ETH_ALEN) < 0) |
485 | goto out; | |
486 | ||
c6c8fea2 | 487 | /* close own batX device and use softif_neigh as exit node */ |
61906ae8 ML |
488 | if (!curr_softif_neigh) { |
489 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
ba85fac2 | 490 | goto out; |
c6c8fea2 SE |
491 | } |
492 | ||
61906ae8 ML |
493 | /* 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); | |
496 | ||
c6c8fea2 | 497 | out: |
c6c8fea2 | 498 | kfree_skb(skb); |
32ae9b22 ML |
499 | if (softif_neigh) |
500 | softif_neigh_free_ref(softif_neigh); | |
ba85fac2 SW |
501 | if (curr_softif_neigh) |
502 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
503 | if (primary_if) |
504 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
505 | return; |
506 | } | |
507 | ||
508 | static int interface_open(struct net_device *dev) | |
509 | { | |
510 | netif_start_queue(dev); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static int interface_release(struct net_device *dev) | |
515 | { | |
516 | netif_stop_queue(dev); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static 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 | ||
526 | static 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 | ||
2dafb49d | 534 | /* only modify transtable if it has been initialised before */ |
c6c8fea2 | 535 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { |
2dafb49d | 536 | tt_local_remove(bat_priv, dev->dev_addr, |
c6c8fea2 | 537 | "mac address changed"); |
2dafb49d | 538 | tt_local_add(dev, addr->sa_data); |
c6c8fea2 SE |
539 | } |
540 | ||
541 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
542 | return 0; | |
543 | } | |
544 | ||
545 | static 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 | ||
556 | int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) | |
557 | { | |
558 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
559 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
32ae9b22 | 560 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
561 | struct bcast_packet *bcast_packet; |
562 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 563 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
564 | 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 | */ | |
61906ae8 ML |
591 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
592 | if (curr_softif_neigh) | |
c6c8fea2 SE |
593 | goto dropped; |
594 | ||
595 | /* TODO: check this for locks */ | |
2dafb49d | 596 | tt_local_add(soft_iface, ethhdr->h_source); |
c6c8fea2 SE |
597 | |
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) { | |
32ae9b22 ML |
610 | primary_if = primary_if_get_selected(bat_priv); |
611 | if (!primary_if) | |
c6c8fea2 SE |
612 | goto dropped; |
613 | ||
614 | if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0) | |
615 | 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, | |
32ae9b22 | 627 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
628 | |
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 | ||
650 | dropped: | |
651 | kfree_skb(skb); | |
652 | dropped_freed: | |
653 | bat_priv->stats.tx_dropped++; | |
654 | end: | |
ba85fac2 SW |
655 | if (curr_softif_neigh) |
656 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
657 | if (primary_if) |
658 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
659 | return NETDEV_TX_OK; |
660 | } | |
661 | ||
662 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 663 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
664 | 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; | |
ba85fac2 | 670 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
671 | 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 | */ | |
61906ae8 ML |
700 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
701 | if (curr_softif_neigh) { | |
c6c8fea2 SE |
702 | 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, | |
ba85fac2 | 712 | curr_softif_neigh->addr, ETH_ALEN); |
7cefb149 | 713 | ret = route_unicast_packet(skb, recv_if); |
c6c8fea2 SE |
714 | 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 | ||
25985edc | 725 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 SE |
726 | * 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); | |
ba85fac2 | 737 | goto out; |
c6c8fea2 SE |
738 | |
739 | dropped: | |
740 | kfree_skb(skb); | |
741 | out: | |
ba85fac2 SW |
742 | if (curr_softif_neigh) |
743 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
744 | return; |
745 | } | |
746 | ||
747 | #ifdef HAVE_NET_DEVICE_OPS | |
748 | static 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 | ||
759 | static 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; | |
af20b710 | 777 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
778 | |
779 | /** | |
780 | * can't call min_mtu, because the needed variables | |
781 | * have not been initialized yet | |
782 | */ | |
783 | dev->mtu = ETH_DATA_LEN; | |
6e215fd8 SE |
784 | /* reserve more space in the skbuff for our header */ |
785 | dev->hard_header_len = BAT_HEADER_LEN; | |
c6c8fea2 SE |
786 | |
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 | ||
793 | memset(priv, 0, sizeof(struct bat_priv)); | |
794 | } | |
795 | ||
796 | struct net_device *softif_create(char *name) | |
797 | { | |
798 | struct net_device *soft_iface; | |
799 | struct bat_priv *bat_priv; | |
800 | int ret; | |
801 | ||
802 | soft_iface = alloc_netdev(sizeof(struct bat_priv) , name, | |
803 | interface_setup); | |
804 | ||
805 | if (!soft_iface) { | |
806 | pr_err("Unable to allocate the batman interface: %s\n", name); | |
807 | goto out; | |
808 | } | |
809 | ||
c3caf519 | 810 | ret = register_netdevice(soft_iface); |
c6c8fea2 SE |
811 | if (ret < 0) { |
812 | pr_err("Unable to register the batman interface '%s': %i\n", | |
813 | name, ret); | |
814 | goto free_soft_iface; | |
815 | } | |
816 | ||
817 | bat_priv = netdev_priv(soft_iface); | |
818 | ||
819 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
820 | atomic_set(&bat_priv->bonding, 0); | |
821 | atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); | |
822 | atomic_set(&bat_priv->gw_mode, GW_MODE_OFF); | |
823 | atomic_set(&bat_priv->gw_sel_class, 20); | |
824 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
825 | atomic_set(&bat_priv->orig_interval, 1000); | |
826 | atomic_set(&bat_priv->hop_penalty, 10); | |
827 | atomic_set(&bat_priv->log_level, 0); | |
828 | atomic_set(&bat_priv->fragmentation, 1); | |
829 | atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN); | |
830 | atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN); | |
831 | ||
832 | atomic_set(&bat_priv->mesh_state, MESH_INACTIVE); | |
833 | atomic_set(&bat_priv->bcast_seqno, 1); | |
2dafb49d | 834 | atomic_set(&bat_priv->tt_local_changed, 0); |
c6c8fea2 SE |
835 | |
836 | bat_priv->primary_if = NULL; | |
837 | bat_priv->num_ifaces = 0; | |
c6c8fea2 SE |
838 | |
839 | ret = sysfs_add_meshif(soft_iface); | |
840 | if (ret < 0) | |
841 | goto unreg_soft_iface; | |
842 | ||
843 | ret = debugfs_add_meshif(soft_iface); | |
844 | if (ret < 0) | |
845 | goto unreg_sysfs; | |
846 | ||
847 | ret = mesh_init(soft_iface); | |
848 | if (ret < 0) | |
849 | goto unreg_debugfs; | |
850 | ||
851 | return soft_iface; | |
852 | ||
853 | unreg_debugfs: | |
854 | debugfs_del_meshif(soft_iface); | |
855 | unreg_sysfs: | |
856 | sysfs_del_meshif(soft_iface); | |
857 | unreg_soft_iface: | |
858 | unregister_netdev(soft_iface); | |
859 | return NULL; | |
860 | ||
861 | free_soft_iface: | |
862 | free_netdev(soft_iface); | |
863 | out: | |
864 | return NULL; | |
865 | } | |
866 | ||
867 | void softif_destroy(struct net_device *soft_iface) | |
868 | { | |
869 | debugfs_del_meshif(soft_iface); | |
870 | sysfs_del_meshif(soft_iface); | |
871 | mesh_free(soft_iface); | |
872 | unregister_netdevice(soft_iface); | |
873 | } | |
874 | ||
e44d8fe2 SE |
875 | int softif_is_valid(struct net_device *net_dev) |
876 | { | |
877 | #ifdef HAVE_NET_DEVICE_OPS | |
878 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
879 | return 1; | |
880 | #else | |
881 | if (net_dev->hard_start_xmit == interface_tx) | |
882 | return 1; | |
883 | #endif | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
c6c8fea2 SE |
888 | /* ethtool */ |
889 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
890 | { | |
891 | cmd->supported = 0; | |
892 | cmd->advertising = 0; | |
70739497 | 893 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
894 | cmd->duplex = DUPLEX_FULL; |
895 | cmd->port = PORT_TP; | |
896 | cmd->phy_address = 0; | |
897 | cmd->transceiver = XCVR_INTERNAL; | |
898 | cmd->autoneg = AUTONEG_DISABLE; | |
899 | cmd->maxtxpkt = 0; | |
900 | cmd->maxrxpkt = 0; | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static void bat_get_drvinfo(struct net_device *dev, | |
906 | struct ethtool_drvinfo *info) | |
907 | { | |
908 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
909 | strcpy(info->version, SOURCE_VERSION); | |
910 | strcpy(info->fw_version, "N/A"); | |
911 | strcpy(info->bus_info, "batman"); | |
912 | } | |
913 | ||
914 | static u32 bat_get_msglevel(struct net_device *dev) | |
915 | { | |
916 | return -EOPNOTSUPP; | |
917 | } | |
918 | ||
919 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
920 | { | |
921 | } | |
922 | ||
923 | static u32 bat_get_link(struct net_device *dev) | |
924 | { | |
925 | return 1; | |
926 | } | |
927 |