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); | |
46 | static u32 bat_get_rx_csum(struct net_device *dev); | |
47 | static int bat_set_rx_csum(struct net_device *dev, u32 data); | |
48 | ||
49 | static const struct ethtool_ops bat_ethtool_ops = { | |
50 | .get_settings = bat_get_settings, | |
51 | .get_drvinfo = bat_get_drvinfo, | |
52 | .get_msglevel = bat_get_msglevel, | |
53 | .set_msglevel = bat_set_msglevel, | |
54 | .get_link = bat_get_link, | |
55 | .get_rx_csum = bat_get_rx_csum, | |
56 | .set_rx_csum = bat_set_rx_csum | |
57 | }; | |
58 | ||
59 | int my_skb_head_push(struct sk_buff *skb, unsigned int len) | |
60 | { | |
61 | int result; | |
62 | ||
63 | /** | |
64 | * TODO: We must check if we can release all references to non-payload | |
65 | * data using skb_header_release in our skbs to allow skb_cow_header to | |
66 | * work optimally. This means that those skbs are not allowed to read | |
67 | * or write any data which is before the current position of skb->data | |
68 | * after that call and thus allow other skbs with the same data buffer | |
69 | * to write freely in that area. | |
70 | */ | |
71 | result = skb_cow_head(skb, len); | |
72 | if (result < 0) | |
73 | return result; | |
74 | ||
75 | skb_push(skb, len); | |
76 | return 0; | |
77 | } | |
78 | ||
7d2b5548 | 79 | static void softif_neigh_free_rcu(struct rcu_head *rcu) |
c6c8fea2 SE |
80 | { |
81 | struct softif_neigh *softif_neigh; | |
82 | ||
7d2b5548 | 83 | softif_neigh = container_of(rcu, struct softif_neigh, rcu); |
c6c8fea2 SE |
84 | kfree(softif_neigh); |
85 | } | |
86 | ||
7d2b5548 | 87 | static void softif_neigh_free_ref(struct softif_neigh *softif_neigh) |
c6c8fea2 | 88 | { |
7d2b5548 ML |
89 | if (atomic_dec_and_test(&softif_neigh->refcount)) |
90 | call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu); | |
c6c8fea2 SE |
91 | } |
92 | ||
61906ae8 | 93 | static void softif_neigh_vid_free_rcu(struct rcu_head *rcu) |
ba85fac2 | 94 | { |
61906ae8 ML |
95 | struct softif_neigh_vid *softif_neigh_vid; |
96 | struct softif_neigh *softif_neigh; | |
97 | struct hlist_node *node, *node_tmp; | |
98 | struct bat_priv *bat_priv; | |
ba85fac2 | 99 | |
61906ae8 ML |
100 | softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu); |
101 | bat_priv = softif_neigh_vid->bat_priv; | |
ba85fac2 SW |
102 | |
103 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
61906ae8 ML |
104 | hlist_for_each_entry_safe(softif_neigh, node, node_tmp, |
105 | &softif_neigh_vid->softif_neigh_list, list) { | |
106 | hlist_del_rcu(&softif_neigh->list); | |
107 | softif_neigh_free_ref(softif_neigh); | |
108 | } | |
ba85fac2 | 109 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
61906ae8 ML |
110 | |
111 | kfree(softif_neigh_vid); | |
ba85fac2 SW |
112 | } |
113 | ||
61906ae8 | 114 | static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid) |
ba85fac2 | 115 | { |
61906ae8 ML |
116 | if (atomic_dec_and_test(&softif_neigh_vid->refcount)) |
117 | call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu); | |
ba85fac2 SW |
118 | } |
119 | ||
61906ae8 ML |
120 | static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv, |
121 | short vid) | |
c6c8fea2 | 122 | { |
61906ae8 ML |
123 | struct softif_neigh_vid *softif_neigh_vid; |
124 | struct hlist_node *node; | |
c6c8fea2 | 125 | |
61906ae8 ML |
126 | rcu_read_lock(); |
127 | hlist_for_each_entry_rcu(softif_neigh_vid, node, | |
128 | &bat_priv->softif_neigh_vids, list) { | |
129 | if (softif_neigh_vid->vid != vid) | |
c6c8fea2 SE |
130 | continue; |
131 | ||
61906ae8 ML |
132 | if (!atomic_inc_not_zero(&softif_neigh_vid->refcount)) |
133 | continue; | |
c6c8fea2 | 134 | |
61906ae8 | 135 | goto out; |
c6c8fea2 SE |
136 | } |
137 | ||
61906ae8 ML |
138 | softif_neigh_vid = kzalloc(sizeof(struct softif_neigh_vid), |
139 | GFP_ATOMIC); | |
140 | if (!softif_neigh_vid) | |
141 | goto out; | |
ba85fac2 | 142 | |
61906ae8 ML |
143 | softif_neigh_vid->vid = vid; |
144 | softif_neigh_vid->bat_priv = bat_priv; | |
ba85fac2 | 145 | |
61906ae8 ML |
146 | /* initialize with 2 - caller decrements counter by one */ |
147 | atomic_set(&softif_neigh_vid->refcount, 2); | |
148 | INIT_HLIST_HEAD(&softif_neigh_vid->softif_neigh_list); | |
149 | INIT_HLIST_NODE(&softif_neigh_vid->list); | |
150 | spin_lock_bh(&bat_priv->softif_neigh_vid_lock); | |
151 | hlist_add_head_rcu(&softif_neigh_vid->list, | |
152 | &bat_priv->softif_neigh_vids); | |
153 | spin_unlock_bh(&bat_priv->softif_neigh_vid_lock); | |
154 | ||
155 | out: | |
156 | rcu_read_unlock(); | |
157 | return softif_neigh_vid; | |
c6c8fea2 SE |
158 | } |
159 | ||
160 | static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv, | |
161 | uint8_t *addr, short vid) | |
162 | { | |
61906ae8 ML |
163 | struct softif_neigh_vid *softif_neigh_vid; |
164 | struct softif_neigh *softif_neigh = NULL; | |
c6c8fea2 SE |
165 | struct hlist_node *node; |
166 | ||
61906ae8 ML |
167 | softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid); |
168 | if (!softif_neigh_vid) | |
169 | goto out; | |
170 | ||
c6c8fea2 SE |
171 | rcu_read_lock(); |
172 | hlist_for_each_entry_rcu(softif_neigh, node, | |
61906ae8 ML |
173 | &softif_neigh_vid->softif_neigh_list, |
174 | list) { | |
39901e71 | 175 | if (!compare_eth(softif_neigh->addr, addr)) |
c6c8fea2 SE |
176 | continue; |
177 | ||
7d2b5548 ML |
178 | if (!atomic_inc_not_zero(&softif_neigh->refcount)) |
179 | continue; | |
180 | ||
c6c8fea2 | 181 | softif_neigh->last_seen = jiffies; |
61906ae8 | 182 | goto unlock; |
c6c8fea2 SE |
183 | } |
184 | ||
185 | softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC); | |
186 | if (!softif_neigh) | |
61906ae8 | 187 | goto unlock; |
c6c8fea2 SE |
188 | |
189 | memcpy(softif_neigh->addr, addr, ETH_ALEN); | |
c6c8fea2 | 190 | softif_neigh->last_seen = jiffies; |
7d2b5548 ML |
191 | /* initialize with 2 - caller decrements counter by one */ |
192 | atomic_set(&softif_neigh->refcount, 2); | |
c6c8fea2 SE |
193 | |
194 | INIT_HLIST_NODE(&softif_neigh->list); | |
195 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
61906ae8 ML |
196 | hlist_add_head_rcu(&softif_neigh->list, |
197 | &softif_neigh_vid->softif_neigh_list); | |
c6c8fea2 SE |
198 | spin_unlock_bh(&bat_priv->softif_neigh_lock); |
199 | ||
61906ae8 ML |
200 | unlock: |
201 | rcu_read_unlock(); | |
c6c8fea2 | 202 | out: |
61906ae8 ML |
203 | if (softif_neigh_vid) |
204 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
205 | return softif_neigh; | |
206 | } | |
207 | ||
208 | static struct softif_neigh *softif_neigh_get_selected( | |
209 | struct softif_neigh_vid *softif_neigh_vid) | |
210 | { | |
211 | struct softif_neigh *softif_neigh; | |
212 | ||
213 | rcu_read_lock(); | |
214 | softif_neigh = rcu_dereference(softif_neigh_vid->softif_neigh); | |
215 | ||
216 | if (softif_neigh && !atomic_inc_not_zero(&softif_neigh->refcount)) | |
217 | softif_neigh = NULL; | |
218 | ||
c6c8fea2 SE |
219 | rcu_read_unlock(); |
220 | return softif_neigh; | |
221 | } | |
222 | ||
61906ae8 ML |
223 | static struct softif_neigh *softif_neigh_vid_get_selected( |
224 | struct bat_priv *bat_priv, | |
225 | short vid) | |
226 | { | |
227 | struct softif_neigh_vid *softif_neigh_vid; | |
228 | struct softif_neigh *softif_neigh = NULL; | |
229 | ||
230 | softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid); | |
231 | if (!softif_neigh_vid) | |
232 | goto out; | |
233 | ||
234 | softif_neigh = softif_neigh_get_selected(softif_neigh_vid); | |
235 | out: | |
236 | if (softif_neigh_vid) | |
237 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
238 | return softif_neigh; | |
239 | } | |
240 | ||
241 | static void softif_neigh_vid_select(struct bat_priv *bat_priv, | |
242 | struct softif_neigh *new_neigh, | |
243 | short vid) | |
244 | { | |
245 | struct softif_neigh_vid *softif_neigh_vid; | |
246 | struct softif_neigh *curr_neigh; | |
247 | ||
248 | softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid); | |
249 | if (!softif_neigh_vid) | |
250 | goto out; | |
251 | ||
252 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
253 | ||
254 | if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount)) | |
255 | new_neigh = NULL; | |
256 | ||
257 | curr_neigh = softif_neigh_vid->softif_neigh; | |
258 | rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh); | |
259 | ||
260 | if ((curr_neigh) && (!new_neigh)) | |
261 | bat_dbg(DBG_ROUTES, bat_priv, | |
262 | "Removing mesh exit point on vid: %d (prev: %pM).\n", | |
263 | vid, curr_neigh->addr); | |
264 | else if ((curr_neigh) && (new_neigh)) | |
265 | bat_dbg(DBG_ROUTES, bat_priv, | |
266 | "Changing mesh exit point on vid: %d from %pM " | |
267 | "to %pM.\n", vid, curr_neigh->addr, new_neigh->addr); | |
268 | else if ((!curr_neigh) && (new_neigh)) | |
269 | bat_dbg(DBG_ROUTES, bat_priv, | |
270 | "Setting mesh exit point on vid: %d to %pM.\n", | |
271 | vid, new_neigh->addr); | |
272 | ||
273 | if (curr_neigh) | |
274 | softif_neigh_free_ref(curr_neigh); | |
275 | ||
276 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
277 | ||
278 | out: | |
279 | if (softif_neigh_vid) | |
280 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
281 | } | |
282 | ||
283 | static void softif_neigh_vid_deselect(struct bat_priv *bat_priv, | |
284 | struct softif_neigh_vid *softif_neigh_vid) | |
285 | { | |
286 | struct softif_neigh *curr_neigh; | |
287 | struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp; | |
288 | struct hard_iface *primary_if = NULL; | |
289 | struct hlist_node *node; | |
290 | ||
291 | primary_if = primary_if_get_selected(bat_priv); | |
292 | if (!primary_if) | |
293 | goto out; | |
294 | ||
295 | /* find new softif_neigh immediately to avoid temporary loops */ | |
296 | rcu_read_lock(); | |
297 | curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh); | |
298 | ||
299 | hlist_for_each_entry_rcu(softif_neigh_tmp, node, | |
300 | &softif_neigh_vid->softif_neigh_list, | |
301 | list) { | |
302 | if (softif_neigh_tmp == curr_neigh) | |
303 | continue; | |
304 | ||
305 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
306 | if (memcmp(primary_if->net_dev->dev_addr, | |
307 | softif_neigh_tmp->addr, ETH_ALEN) < 0) | |
308 | continue; | |
309 | ||
310 | if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount)) | |
311 | continue; | |
312 | ||
313 | softif_neigh = softif_neigh_tmp; | |
314 | goto unlock; | |
315 | } | |
316 | ||
317 | unlock: | |
318 | rcu_read_unlock(); | |
319 | out: | |
320 | softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid); | |
321 | ||
322 | if (primary_if) | |
323 | hardif_free_ref(primary_if); | |
324 | if (softif_neigh) | |
325 | softif_neigh_free_ref(softif_neigh); | |
326 | } | |
327 | ||
c6c8fea2 SE |
328 | int softif_neigh_seq_print_text(struct seq_file *seq, void *offset) |
329 | { | |
330 | struct net_device *net_dev = (struct net_device *)seq->private; | |
331 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
61906ae8 | 332 | struct softif_neigh_vid *softif_neigh_vid; |
c6c8fea2 | 333 | struct softif_neigh *softif_neigh; |
32ae9b22 | 334 | struct hard_iface *primary_if; |
61906ae8 | 335 | struct hlist_node *node, *node_tmp; |
ba85fac2 | 336 | struct softif_neigh *curr_softif_neigh; |
61906ae8 | 337 | int ret = 0, last_seen_secs, last_seen_msecs; |
c6c8fea2 | 338 | |
32ae9b22 ML |
339 | primary_if = primary_if_get_selected(bat_priv); |
340 | if (!primary_if) { | |
341 | ret = seq_printf(seq, "BATMAN mesh %s disabled - " | |
342 | "please specify interfaces to enable it\n", | |
343 | net_dev->name); | |
344 | goto out; | |
345 | } | |
346 | ||
347 | if (primary_if->if_status != IF_ACTIVE) { | |
348 | ret = seq_printf(seq, "BATMAN mesh %s " | |
349 | "disabled - primary interface not active\n", | |
350 | net_dev->name); | |
351 | goto out; | |
c6c8fea2 SE |
352 | } |
353 | ||
354 | seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name); | |
355 | ||
c6c8fea2 | 356 | rcu_read_lock(); |
61906ae8 ML |
357 | hlist_for_each_entry_rcu(softif_neigh_vid, node, |
358 | &bat_priv->softif_neigh_vids, list) { | |
359 | seq_printf(seq, " %-15s %s on vid: %d\n", | |
360 | "Originator", "last-seen", softif_neigh_vid->vid); | |
361 | ||
362 | curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid); | |
363 | ||
364 | hlist_for_each_entry_rcu(softif_neigh, node_tmp, | |
365 | &softif_neigh_vid->softif_neigh_list, | |
366 | list) { | |
367 | last_seen_secs = jiffies_to_msecs(jiffies - | |
368 | softif_neigh->last_seen) / 1000; | |
369 | last_seen_msecs = jiffies_to_msecs(jiffies - | |
370 | softif_neigh->last_seen) % 1000; | |
371 | seq_printf(seq, "%s %pM %3i.%03is\n", | |
372 | curr_softif_neigh == softif_neigh | |
373 | ? "=>" : " ", softif_neigh->addr, | |
374 | last_seen_secs, last_seen_msecs); | |
375 | } | |
376 | ||
377 | if (curr_softif_neigh) | |
378 | softif_neigh_free_ref(curr_softif_neigh); | |
379 | ||
380 | seq_printf(seq, "\n"); | |
381 | } | |
c6c8fea2 SE |
382 | rcu_read_unlock(); |
383 | ||
32ae9b22 ML |
384 | out: |
385 | if (primary_if) | |
386 | hardif_free_ref(primary_if); | |
387 | return ret; | |
c6c8fea2 SE |
388 | } |
389 | ||
61906ae8 ML |
390 | void softif_neigh_purge(struct bat_priv *bat_priv) |
391 | { | |
392 | struct softif_neigh *softif_neigh, *curr_softif_neigh; | |
393 | struct softif_neigh_vid *softif_neigh_vid; | |
394 | struct hlist_node *node, *node_tmp, *node_tmp2; | |
395 | char do_deselect; | |
396 | ||
397 | rcu_read_lock(); | |
398 | hlist_for_each_entry_rcu(softif_neigh_vid, node, | |
399 | &bat_priv->softif_neigh_vids, list) { | |
400 | if (!atomic_inc_not_zero(&softif_neigh_vid->refcount)) | |
401 | continue; | |
402 | ||
403 | curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid); | |
404 | do_deselect = 0; | |
405 | ||
406 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
407 | hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2, | |
408 | &softif_neigh_vid->softif_neigh_list, | |
409 | list) { | |
410 | if ((!time_after(jiffies, softif_neigh->last_seen + | |
411 | msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) && | |
412 | (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)) | |
413 | continue; | |
414 | ||
415 | if (curr_softif_neigh == softif_neigh) { | |
416 | bat_dbg(DBG_ROUTES, bat_priv, | |
417 | "Current mesh exit point on vid: %d " | |
418 | "'%pM' vanished.\n", | |
419 | softif_neigh_vid->vid, | |
420 | softif_neigh->addr); | |
421 | do_deselect = 1; | |
422 | } | |
423 | ||
424 | hlist_del_rcu(&softif_neigh->list); | |
425 | softif_neigh_free_ref(softif_neigh); | |
426 | } | |
427 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
428 | ||
429 | /* soft_neigh_vid_deselect() needs to acquire the | |
430 | * softif_neigh_lock */ | |
431 | if (do_deselect) | |
432 | softif_neigh_vid_deselect(bat_priv, softif_neigh_vid); | |
433 | ||
434 | if (curr_softif_neigh) | |
435 | softif_neigh_free_ref(curr_softif_neigh); | |
436 | ||
437 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
438 | } | |
439 | rcu_read_unlock(); | |
440 | ||
441 | spin_lock_bh(&bat_priv->softif_neigh_vid_lock); | |
442 | hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp, | |
443 | &bat_priv->softif_neigh_vids, list) { | |
444 | if (!hlist_empty(&softif_neigh_vid->softif_neigh_list)) | |
445 | continue; | |
446 | ||
447 | hlist_del_rcu(&softif_neigh_vid->list); | |
448 | softif_neigh_vid_free_ref(softif_neigh_vid); | |
449 | } | |
450 | spin_unlock_bh(&bat_priv->softif_neigh_vid_lock); | |
451 | ||
452 | } | |
453 | ||
c6c8fea2 SE |
454 | static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev, |
455 | short vid) | |
456 | { | |
457 | struct bat_priv *bat_priv = netdev_priv(dev); | |
458 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
459 | struct batman_packet *batman_packet; | |
32ae9b22 ML |
460 | struct softif_neigh *softif_neigh = NULL; |
461 | struct hard_iface *primary_if = NULL; | |
ba85fac2 | 462 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
463 | |
464 | if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) | |
465 | batman_packet = (struct batman_packet *) | |
466 | (skb->data + ETH_HLEN + VLAN_HLEN); | |
467 | else | |
468 | batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN); | |
469 | ||
470 | if (batman_packet->version != COMPAT_VERSION) | |
32ae9b22 | 471 | goto out; |
c6c8fea2 SE |
472 | |
473 | if (batman_packet->packet_type != BAT_PACKET) | |
32ae9b22 | 474 | goto out; |
c6c8fea2 SE |
475 | |
476 | if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) | |
32ae9b22 | 477 | goto out; |
c6c8fea2 SE |
478 | |
479 | if (is_my_mac(batman_packet->orig)) | |
32ae9b22 | 480 | goto out; |
c6c8fea2 SE |
481 | |
482 | softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); | |
c6c8fea2 | 483 | if (!softif_neigh) |
32ae9b22 | 484 | goto out; |
c6c8fea2 | 485 | |
61906ae8 | 486 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
ba85fac2 | 487 | if (curr_softif_neigh == softif_neigh) |
c6c8fea2 SE |
488 | goto out; |
489 | ||
32ae9b22 ML |
490 | primary_if = primary_if_get_selected(bat_priv); |
491 | if (!primary_if) | |
492 | goto out; | |
493 | ||
c6c8fea2 | 494 | /* we got a neighbor but its mac is 'bigger' than ours */ |
32ae9b22 | 495 | if (memcmp(primary_if->net_dev->dev_addr, |
c6c8fea2 SE |
496 | softif_neigh->addr, ETH_ALEN) < 0) |
497 | goto out; | |
498 | ||
c6c8fea2 | 499 | /* close own batX device and use softif_neigh as exit node */ |
61906ae8 ML |
500 | if (!curr_softif_neigh) { |
501 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
ba85fac2 | 502 | goto out; |
c6c8fea2 SE |
503 | } |
504 | ||
61906ae8 ML |
505 | /* switch to new 'smallest neighbor' */ |
506 | if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0) | |
507 | softif_neigh_vid_select(bat_priv, softif_neigh, vid); | |
508 | ||
c6c8fea2 | 509 | out: |
c6c8fea2 | 510 | kfree_skb(skb); |
32ae9b22 ML |
511 | if (softif_neigh) |
512 | softif_neigh_free_ref(softif_neigh); | |
ba85fac2 SW |
513 | if (curr_softif_neigh) |
514 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
515 | if (primary_if) |
516 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
517 | return; |
518 | } | |
519 | ||
520 | static int interface_open(struct net_device *dev) | |
521 | { | |
522 | netif_start_queue(dev); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static int interface_release(struct net_device *dev) | |
527 | { | |
528 | netif_stop_queue(dev); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static struct net_device_stats *interface_stats(struct net_device *dev) | |
533 | { | |
534 | struct bat_priv *bat_priv = netdev_priv(dev); | |
535 | return &bat_priv->stats; | |
536 | } | |
537 | ||
538 | static int interface_set_mac_addr(struct net_device *dev, void *p) | |
539 | { | |
540 | struct bat_priv *bat_priv = netdev_priv(dev); | |
541 | struct sockaddr *addr = p; | |
542 | ||
543 | if (!is_valid_ether_addr(addr->sa_data)) | |
544 | return -EADDRNOTAVAIL; | |
545 | ||
546 | /* only modify hna-table if it has been initialised before */ | |
547 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { | |
548 | hna_local_remove(bat_priv, dev->dev_addr, | |
549 | "mac address changed"); | |
550 | hna_local_add(dev, addr->sa_data); | |
551 | } | |
552 | ||
553 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
554 | return 0; | |
555 | } | |
556 | ||
557 | static int interface_change_mtu(struct net_device *dev, int new_mtu) | |
558 | { | |
559 | /* check ranges */ | |
560 | if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev))) | |
561 | return -EINVAL; | |
562 | ||
563 | dev->mtu = new_mtu; | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) | |
569 | { | |
570 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
571 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
32ae9b22 | 572 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
573 | struct bcast_packet *bcast_packet; |
574 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 575 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
576 | int data_len = skb->len, ret; |
577 | short vid = -1; | |
578 | bool do_bcast = false; | |
579 | ||
580 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) | |
581 | goto dropped; | |
582 | ||
583 | soft_iface->trans_start = jiffies; | |
584 | ||
585 | switch (ntohs(ethhdr->h_proto)) { | |
586 | case ETH_P_8021Q: | |
587 | vhdr = (struct vlan_ethhdr *)skb->data; | |
588 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
589 | ||
590 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
591 | break; | |
592 | ||
593 | /* fall through */ | |
594 | case ETH_P_BATMAN: | |
595 | softif_batman_recv(skb, soft_iface, vid); | |
596 | goto end; | |
597 | } | |
598 | ||
599 | /** | |
600 | * if we have a another chosen mesh exit node in range | |
601 | * it will transport the packets to the mesh | |
602 | */ | |
61906ae8 ML |
603 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
604 | if (curr_softif_neigh) | |
c6c8fea2 SE |
605 | goto dropped; |
606 | ||
607 | /* TODO: check this for locks */ | |
608 | hna_local_add(soft_iface, ethhdr->h_source); | |
609 | ||
610 | if (is_multicast_ether_addr(ethhdr->h_dest)) { | |
611 | ret = gw_is_target(bat_priv, skb); | |
612 | ||
613 | if (ret < 0) | |
614 | goto dropped; | |
615 | ||
616 | if (ret == 0) | |
617 | do_bcast = true; | |
618 | } | |
619 | ||
620 | /* ethernet packet should be broadcasted */ | |
621 | if (do_bcast) { | |
32ae9b22 ML |
622 | primary_if = primary_if_get_selected(bat_priv); |
623 | if (!primary_if) | |
c6c8fea2 SE |
624 | goto dropped; |
625 | ||
626 | if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0) | |
627 | goto dropped; | |
628 | ||
629 | bcast_packet = (struct bcast_packet *)skb->data; | |
630 | bcast_packet->version = COMPAT_VERSION; | |
631 | bcast_packet->ttl = TTL; | |
632 | ||
633 | /* batman packet type: broadcast */ | |
634 | bcast_packet->packet_type = BAT_BCAST; | |
635 | ||
636 | /* hw address of first interface is the orig mac because only | |
637 | * this mac is known throughout the mesh */ | |
638 | memcpy(bcast_packet->orig, | |
32ae9b22 | 639 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
640 | |
641 | /* set broadcast sequence number */ | |
642 | bcast_packet->seqno = | |
643 | htonl(atomic_inc_return(&bat_priv->bcast_seqno)); | |
644 | ||
645 | add_bcast_packet_to_list(bat_priv, skb); | |
646 | ||
647 | /* a copy is stored in the bcast list, therefore removing | |
648 | * the original skb. */ | |
649 | kfree_skb(skb); | |
650 | ||
651 | /* unicast packet */ | |
652 | } else { | |
653 | ret = unicast_send_skb(skb, bat_priv); | |
654 | if (ret != 0) | |
655 | goto dropped_freed; | |
656 | } | |
657 | ||
658 | bat_priv->stats.tx_packets++; | |
659 | bat_priv->stats.tx_bytes += data_len; | |
660 | goto end; | |
661 | ||
662 | dropped: | |
663 | kfree_skb(skb); | |
664 | dropped_freed: | |
665 | bat_priv->stats.tx_dropped++; | |
666 | end: | |
ba85fac2 SW |
667 | if (curr_softif_neigh) |
668 | softif_neigh_free_ref(curr_softif_neigh); | |
32ae9b22 ML |
669 | if (primary_if) |
670 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
671 | return NETDEV_TX_OK; |
672 | } | |
673 | ||
674 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 675 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
676 | int hdr_size) |
677 | { | |
678 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
679 | struct unicast_packet *unicast_packet; | |
680 | struct ethhdr *ethhdr; | |
681 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 682 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
683 | short vid = -1; |
684 | int ret; | |
685 | ||
686 | /* check if enough space is available for pulling, and pull */ | |
687 | if (!pskb_may_pull(skb, hdr_size)) | |
688 | goto dropped; | |
689 | ||
690 | skb_pull_rcsum(skb, hdr_size); | |
691 | skb_reset_mac_header(skb); | |
692 | ||
693 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
694 | ||
695 | switch (ntohs(ethhdr->h_proto)) { | |
696 | case ETH_P_8021Q: | |
697 | vhdr = (struct vlan_ethhdr *)skb->data; | |
698 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
699 | ||
700 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
701 | break; | |
702 | ||
703 | /* fall through */ | |
704 | case ETH_P_BATMAN: | |
705 | goto dropped; | |
706 | } | |
707 | ||
708 | /** | |
709 | * if we have a another chosen mesh exit node in range | |
710 | * it will transport the packets to the non-mesh network | |
711 | */ | |
61906ae8 ML |
712 | curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid); |
713 | if (curr_softif_neigh) { | |
c6c8fea2 SE |
714 | skb_push(skb, hdr_size); |
715 | unicast_packet = (struct unicast_packet *)skb->data; | |
716 | ||
717 | if ((unicast_packet->packet_type != BAT_UNICAST) && | |
718 | (unicast_packet->packet_type != BAT_UNICAST_FRAG)) | |
719 | goto dropped; | |
720 | ||
721 | skb_reset_mac_header(skb); | |
722 | ||
723 | memcpy(unicast_packet->dest, | |
ba85fac2 | 724 | curr_softif_neigh->addr, ETH_ALEN); |
7cefb149 | 725 | ret = route_unicast_packet(skb, recv_if); |
c6c8fea2 SE |
726 | if (ret == NET_RX_DROP) |
727 | goto dropped; | |
728 | ||
729 | goto out; | |
730 | } | |
731 | ||
732 | /* skb->dev & skb->pkt_type are set here */ | |
733 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
734 | goto dropped; | |
735 | skb->protocol = eth_type_trans(skb, soft_iface); | |
736 | ||
737 | /* should not be neccesary anymore as we use skb_pull_rcsum() | |
738 | * TODO: please verify this and remove this TODO | |
739 | * -- Dec 21st 2009, Simon Wunderlich */ | |
740 | ||
741 | /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ | |
742 | ||
743 | bat_priv->stats.rx_packets++; | |
744 | bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr); | |
745 | ||
746 | soft_iface->last_rx = jiffies; | |
747 | ||
748 | netif_rx(skb); | |
ba85fac2 | 749 | goto out; |
c6c8fea2 SE |
750 | |
751 | dropped: | |
752 | kfree_skb(skb); | |
753 | out: | |
ba85fac2 SW |
754 | if (curr_softif_neigh) |
755 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
756 | return; |
757 | } | |
758 | ||
759 | #ifdef HAVE_NET_DEVICE_OPS | |
760 | static const struct net_device_ops bat_netdev_ops = { | |
761 | .ndo_open = interface_open, | |
762 | .ndo_stop = interface_release, | |
763 | .ndo_get_stats = interface_stats, | |
764 | .ndo_set_mac_address = interface_set_mac_addr, | |
765 | .ndo_change_mtu = interface_change_mtu, | |
766 | .ndo_start_xmit = interface_tx, | |
767 | .ndo_validate_addr = eth_validate_addr | |
768 | }; | |
769 | #endif | |
770 | ||
771 | static void interface_setup(struct net_device *dev) | |
772 | { | |
773 | struct bat_priv *priv = netdev_priv(dev); | |
774 | char dev_addr[ETH_ALEN]; | |
775 | ||
776 | ether_setup(dev); | |
777 | ||
778 | #ifdef HAVE_NET_DEVICE_OPS | |
779 | dev->netdev_ops = &bat_netdev_ops; | |
780 | #else | |
781 | dev->open = interface_open; | |
782 | dev->stop = interface_release; | |
783 | dev->get_stats = interface_stats; | |
784 | dev->set_mac_address = interface_set_mac_addr; | |
785 | dev->change_mtu = interface_change_mtu; | |
786 | dev->hard_start_xmit = interface_tx; | |
787 | #endif | |
788 | dev->destructor = free_netdev; | |
af20b710 | 789 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
790 | |
791 | /** | |
792 | * can't call min_mtu, because the needed variables | |
793 | * have not been initialized yet | |
794 | */ | |
795 | dev->mtu = ETH_DATA_LEN; | |
796 | dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the | |
797 | * skbuff for our header */ | |
798 | ||
799 | /* generate random address */ | |
800 | random_ether_addr(dev_addr); | |
801 | memcpy(dev->dev_addr, dev_addr, ETH_ALEN); | |
802 | ||
803 | SET_ETHTOOL_OPS(dev, &bat_ethtool_ops); | |
804 | ||
805 | memset(priv, 0, sizeof(struct bat_priv)); | |
806 | } | |
807 | ||
808 | struct net_device *softif_create(char *name) | |
809 | { | |
810 | struct net_device *soft_iface; | |
811 | struct bat_priv *bat_priv; | |
812 | int ret; | |
813 | ||
814 | soft_iface = alloc_netdev(sizeof(struct bat_priv) , name, | |
815 | interface_setup); | |
816 | ||
817 | if (!soft_iface) { | |
818 | pr_err("Unable to allocate the batman interface: %s\n", name); | |
819 | goto out; | |
820 | } | |
821 | ||
c3caf519 | 822 | ret = register_netdevice(soft_iface); |
c6c8fea2 SE |
823 | if (ret < 0) { |
824 | pr_err("Unable to register the batman interface '%s': %i\n", | |
825 | name, ret); | |
826 | goto free_soft_iface; | |
827 | } | |
828 | ||
829 | bat_priv = netdev_priv(soft_iface); | |
830 | ||
831 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
832 | atomic_set(&bat_priv->bonding, 0); | |
833 | atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); | |
834 | atomic_set(&bat_priv->gw_mode, GW_MODE_OFF); | |
835 | atomic_set(&bat_priv->gw_sel_class, 20); | |
836 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
837 | atomic_set(&bat_priv->orig_interval, 1000); | |
838 | atomic_set(&bat_priv->hop_penalty, 10); | |
839 | atomic_set(&bat_priv->log_level, 0); | |
840 | atomic_set(&bat_priv->fragmentation, 1); | |
841 | atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN); | |
842 | atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN); | |
843 | ||
844 | atomic_set(&bat_priv->mesh_state, MESH_INACTIVE); | |
845 | atomic_set(&bat_priv->bcast_seqno, 1); | |
846 | atomic_set(&bat_priv->hna_local_changed, 0); | |
847 | ||
848 | bat_priv->primary_if = NULL; | |
849 | bat_priv->num_ifaces = 0; | |
c6c8fea2 SE |
850 | |
851 | ret = sysfs_add_meshif(soft_iface); | |
852 | if (ret < 0) | |
853 | goto unreg_soft_iface; | |
854 | ||
855 | ret = debugfs_add_meshif(soft_iface); | |
856 | if (ret < 0) | |
857 | goto unreg_sysfs; | |
858 | ||
859 | ret = mesh_init(soft_iface); | |
860 | if (ret < 0) | |
861 | goto unreg_debugfs; | |
862 | ||
863 | return soft_iface; | |
864 | ||
865 | unreg_debugfs: | |
866 | debugfs_del_meshif(soft_iface); | |
867 | unreg_sysfs: | |
868 | sysfs_del_meshif(soft_iface); | |
869 | unreg_soft_iface: | |
870 | unregister_netdev(soft_iface); | |
871 | return NULL; | |
872 | ||
873 | free_soft_iface: | |
874 | free_netdev(soft_iface); | |
875 | out: | |
876 | return NULL; | |
877 | } | |
878 | ||
879 | void softif_destroy(struct net_device *soft_iface) | |
880 | { | |
881 | debugfs_del_meshif(soft_iface); | |
882 | sysfs_del_meshif(soft_iface); | |
883 | mesh_free(soft_iface); | |
884 | unregister_netdevice(soft_iface); | |
885 | } | |
886 | ||
e44d8fe2 SE |
887 | int softif_is_valid(struct net_device *net_dev) |
888 | { | |
889 | #ifdef HAVE_NET_DEVICE_OPS | |
890 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
891 | return 1; | |
892 | #else | |
893 | if (net_dev->hard_start_xmit == interface_tx) | |
894 | return 1; | |
895 | #endif | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
c6c8fea2 SE |
900 | /* ethtool */ |
901 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
902 | { | |
903 | cmd->supported = 0; | |
904 | cmd->advertising = 0; | |
905 | cmd->speed = SPEED_10; | |
906 | cmd->duplex = DUPLEX_FULL; | |
907 | cmd->port = PORT_TP; | |
908 | cmd->phy_address = 0; | |
909 | cmd->transceiver = XCVR_INTERNAL; | |
910 | cmd->autoneg = AUTONEG_DISABLE; | |
911 | cmd->maxtxpkt = 0; | |
912 | cmd->maxrxpkt = 0; | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | static void bat_get_drvinfo(struct net_device *dev, | |
918 | struct ethtool_drvinfo *info) | |
919 | { | |
920 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
921 | strcpy(info->version, SOURCE_VERSION); | |
922 | strcpy(info->fw_version, "N/A"); | |
923 | strcpy(info->bus_info, "batman"); | |
924 | } | |
925 | ||
926 | static u32 bat_get_msglevel(struct net_device *dev) | |
927 | { | |
928 | return -EOPNOTSUPP; | |
929 | } | |
930 | ||
931 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
932 | { | |
933 | } | |
934 | ||
935 | static u32 bat_get_link(struct net_device *dev) | |
936 | { | |
937 | return 1; | |
938 | } | |
939 | ||
940 | static u32 bat_get_rx_csum(struct net_device *dev) | |
941 | { | |
942 | return 0; | |
943 | } | |
944 | ||
945 | static int bat_set_rx_csum(struct net_device *dev, u32 data) | |
946 | { | |
947 | return -EOPNOTSUPP; | |
948 | } |