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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_rcu(struct rcu_head *rcu) |
c6c8fea2 SE |
76 | { |
77 | struct softif_neigh *softif_neigh; | |
78 | ||
7d2b5548 | 79 | softif_neigh = container_of(rcu, struct softif_neigh, rcu); |
c6c8fea2 SE |
80 | kfree(softif_neigh); |
81 | } | |
82 | ||
7d2b5548 | 83 | static void softif_neigh_free_ref(struct softif_neigh *softif_neigh) |
c6c8fea2 | 84 | { |
7d2b5548 ML |
85 | if (atomic_dec_and_test(&softif_neigh->refcount)) |
86 | call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu); | |
c6c8fea2 SE |
87 | } |
88 | ||
ba85fac2 SW |
89 | static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv) |
90 | { | |
91 | struct softif_neigh *neigh; | |
92 | ||
93 | rcu_read_lock(); | |
94 | neigh = rcu_dereference(bat_priv->softif_neigh); | |
95 | ||
96 | if (neigh && !atomic_inc_not_zero(&neigh->refcount)) | |
97 | neigh = NULL; | |
98 | ||
99 | rcu_read_unlock(); | |
100 | return neigh; | |
101 | } | |
102 | ||
103 | static void softif_neigh_select(struct bat_priv *bat_priv, | |
104 | struct softif_neigh *new_neigh) | |
105 | { | |
106 | struct softif_neigh *curr_neigh; | |
107 | ||
108 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
109 | ||
110 | if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount)) | |
111 | new_neigh = NULL; | |
112 | ||
113 | curr_neigh = bat_priv->softif_neigh; | |
114 | rcu_assign_pointer(bat_priv->softif_neigh, new_neigh); | |
115 | ||
116 | if (curr_neigh) | |
117 | softif_neigh_free_ref(curr_neigh); | |
118 | ||
119 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
120 | } | |
121 | ||
122 | static void softif_neigh_deselect(struct bat_priv *bat_priv) | |
123 | { | |
124 | softif_neigh_select(bat_priv, NULL); | |
125 | } | |
126 | ||
c6c8fea2 SE |
127 | void softif_neigh_purge(struct bat_priv *bat_priv) |
128 | { | |
ba85fac2 | 129 | struct softif_neigh *softif_neigh, *curr_softif_neigh; |
c6c8fea2 | 130 | struct hlist_node *node, *node_tmp; |
ba85fac2 SW |
131 | char do_deselect = 0; |
132 | ||
133 | curr_softif_neigh = softif_neigh_get_selected(bat_priv); | |
c6c8fea2 SE |
134 | |
135 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
136 | ||
137 | hlist_for_each_entry_safe(softif_neigh, node, node_tmp, | |
138 | &bat_priv->softif_neigh_list, list) { | |
139 | ||
140 | if ((!time_after(jiffies, softif_neigh->last_seen + | |
141 | msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) && | |
142 | (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)) | |
143 | continue; | |
144 | ||
ba85fac2 | 145 | if (curr_softif_neigh == softif_neigh) { |
c6c8fea2 SE |
146 | bat_dbg(DBG_ROUTES, bat_priv, |
147 | "Current mesh exit point '%pM' vanished " | |
148 | "(vid: %d).\n", | |
149 | softif_neigh->addr, softif_neigh->vid); | |
ba85fac2 | 150 | do_deselect = 1; |
c6c8fea2 SE |
151 | } |
152 | ||
ba85fac2 | 153 | hlist_del_rcu(&softif_neigh->list); |
7d2b5548 | 154 | softif_neigh_free_ref(softif_neigh); |
c6c8fea2 SE |
155 | } |
156 | ||
157 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
ba85fac2 SW |
158 | |
159 | /* soft_neigh_deselect() needs to acquire the softif_neigh_lock */ | |
160 | if (do_deselect) | |
161 | softif_neigh_deselect(bat_priv); | |
162 | ||
163 | if (curr_softif_neigh) | |
164 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
165 | } |
166 | ||
167 | static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv, | |
168 | uint8_t *addr, short vid) | |
169 | { | |
170 | struct softif_neigh *softif_neigh; | |
171 | struct hlist_node *node; | |
172 | ||
173 | rcu_read_lock(); | |
174 | hlist_for_each_entry_rcu(softif_neigh, node, | |
175 | &bat_priv->softif_neigh_list, list) { | |
39901e71 | 176 | if (!compare_eth(softif_neigh->addr, addr)) |
c6c8fea2 SE |
177 | continue; |
178 | ||
179 | if (softif_neigh->vid != vid) | |
180 | continue; | |
181 | ||
7d2b5548 ML |
182 | if (!atomic_inc_not_zero(&softif_neigh->refcount)) |
183 | continue; | |
184 | ||
c6c8fea2 | 185 | softif_neigh->last_seen = jiffies; |
7d2b5548 | 186 | goto out; |
c6c8fea2 SE |
187 | } |
188 | ||
189 | softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC); | |
190 | if (!softif_neigh) | |
191 | goto out; | |
192 | ||
193 | memcpy(softif_neigh->addr, addr, ETH_ALEN); | |
194 | softif_neigh->vid = vid; | |
195 | softif_neigh->last_seen = jiffies; | |
7d2b5548 ML |
196 | /* initialize with 2 - caller decrements counter by one */ |
197 | atomic_set(&softif_neigh->refcount, 2); | |
c6c8fea2 SE |
198 | |
199 | INIT_HLIST_NODE(&softif_neigh->list); | |
200 | spin_lock_bh(&bat_priv->softif_neigh_lock); | |
201 | hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list); | |
202 | spin_unlock_bh(&bat_priv->softif_neigh_lock); | |
203 | ||
c6c8fea2 SE |
204 | out: |
205 | rcu_read_unlock(); | |
206 | return softif_neigh; | |
207 | } | |
208 | ||
209 | int softif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
210 | { | |
211 | struct net_device *net_dev = (struct net_device *)seq->private; | |
212 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
213 | struct softif_neigh *softif_neigh; | |
214 | struct hlist_node *node; | |
ba85fac2 | 215 | struct softif_neigh *curr_softif_neigh; |
c6c8fea2 SE |
216 | |
217 | if (!bat_priv->primary_if) { | |
218 | return seq_printf(seq, "BATMAN mesh %s disabled - " | |
219 | "please specify interfaces to enable it\n", | |
220 | net_dev->name); | |
221 | } | |
222 | ||
223 | seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name); | |
224 | ||
ba85fac2 | 225 | curr_softif_neigh = softif_neigh_get_selected(bat_priv); |
c6c8fea2 SE |
226 | rcu_read_lock(); |
227 | hlist_for_each_entry_rcu(softif_neigh, node, | |
228 | &bat_priv->softif_neigh_list, list) | |
9e0b33c2 | 229 | seq_printf(seq, "%s %pM (vid: %d)\n", |
ba85fac2 | 230 | curr_softif_neigh == softif_neigh |
c6c8fea2 SE |
231 | ? "=>" : " ", softif_neigh->addr, |
232 | softif_neigh->vid); | |
c6c8fea2 | 233 | rcu_read_unlock(); |
ba85fac2 SW |
234 | if (curr_softif_neigh) |
235 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 | 236 | |
c6c8fea2 SE |
237 | return 0; |
238 | } | |
239 | ||
240 | static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev, | |
241 | short vid) | |
242 | { | |
243 | struct bat_priv *bat_priv = netdev_priv(dev); | |
244 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
245 | struct batman_packet *batman_packet; | |
ba85fac2 SW |
246 | struct softif_neigh *softif_neigh; |
247 | struct softif_neigh *curr_softif_neigh = NULL; | |
c6c8fea2 SE |
248 | |
249 | if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) | |
250 | batman_packet = (struct batman_packet *) | |
251 | (skb->data + ETH_HLEN + VLAN_HLEN); | |
252 | else | |
253 | batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN); | |
254 | ||
255 | if (batman_packet->version != COMPAT_VERSION) | |
256 | goto err; | |
257 | ||
258 | if (batman_packet->packet_type != BAT_PACKET) | |
259 | goto err; | |
260 | ||
261 | if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) | |
262 | goto err; | |
263 | ||
264 | if (is_my_mac(batman_packet->orig)) | |
265 | goto err; | |
266 | ||
267 | softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); | |
268 | ||
269 | if (!softif_neigh) | |
270 | goto err; | |
271 | ||
ba85fac2 SW |
272 | curr_softif_neigh = softif_neigh_get_selected(bat_priv); |
273 | if (curr_softif_neigh == softif_neigh) | |
c6c8fea2 SE |
274 | goto out; |
275 | ||
276 | /* we got a neighbor but its mac is 'bigger' than ours */ | |
277 | if (memcmp(bat_priv->primary_if->net_dev->dev_addr, | |
278 | softif_neigh->addr, ETH_ALEN) < 0) | |
279 | goto out; | |
280 | ||
281 | /* switch to new 'smallest neighbor' */ | |
ba85fac2 SW |
282 | if ((curr_softif_neigh) && |
283 | (memcmp(softif_neigh->addr, curr_softif_neigh->addr, | |
c6c8fea2 SE |
284 | ETH_ALEN) < 0)) { |
285 | bat_dbg(DBG_ROUTES, bat_priv, | |
286 | "Changing mesh exit point from %pM (vid: %d) " | |
287 | "to %pM (vid: %d).\n", | |
ba85fac2 SW |
288 | curr_softif_neigh->addr, |
289 | curr_softif_neigh->vid, | |
c6c8fea2 | 290 | softif_neigh->addr, softif_neigh->vid); |
ba85fac2 SW |
291 | |
292 | softif_neigh_select(bat_priv, softif_neigh); | |
293 | goto out; | |
c6c8fea2 SE |
294 | } |
295 | ||
296 | /* close own batX device and use softif_neigh as exit node */ | |
ba85fac2 | 297 | if ((!curr_softif_neigh) && |
c6c8fea2 SE |
298 | (memcmp(softif_neigh->addr, |
299 | bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) { | |
300 | bat_dbg(DBG_ROUTES, bat_priv, | |
301 | "Setting mesh exit point to %pM (vid: %d).\n", | |
302 | softif_neigh->addr, softif_neigh->vid); | |
ba85fac2 SW |
303 | |
304 | softif_neigh_select(bat_priv, softif_neigh); | |
305 | goto out; | |
c6c8fea2 SE |
306 | } |
307 | ||
308 | out: | |
7d2b5548 | 309 | softif_neigh_free_ref(softif_neigh); |
c6c8fea2 SE |
310 | err: |
311 | kfree_skb(skb); | |
ba85fac2 SW |
312 | if (curr_softif_neigh) |
313 | softif_neigh_free_ref(curr_softif_neigh); | |
314 | ||
c6c8fea2 SE |
315 | return; |
316 | } | |
317 | ||
318 | static int interface_open(struct net_device *dev) | |
319 | { | |
320 | netif_start_queue(dev); | |
321 | return 0; | |
322 | } | |
323 | ||
324 | static int interface_release(struct net_device *dev) | |
325 | { | |
326 | netif_stop_queue(dev); | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static struct net_device_stats *interface_stats(struct net_device *dev) | |
331 | { | |
332 | struct bat_priv *bat_priv = netdev_priv(dev); | |
333 | return &bat_priv->stats; | |
334 | } | |
335 | ||
336 | static int interface_set_mac_addr(struct net_device *dev, void *p) | |
337 | { | |
338 | struct bat_priv *bat_priv = netdev_priv(dev); | |
339 | struct sockaddr *addr = p; | |
340 | ||
341 | if (!is_valid_ether_addr(addr->sa_data)) | |
342 | return -EADDRNOTAVAIL; | |
343 | ||
344 | /* only modify hna-table if it has been initialised before */ | |
345 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { | |
346 | hna_local_remove(bat_priv, dev->dev_addr, | |
347 | "mac address changed"); | |
348 | hna_local_add(dev, addr->sa_data); | |
349 | } | |
350 | ||
351 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int interface_change_mtu(struct net_device *dev, int new_mtu) | |
356 | { | |
357 | /* check ranges */ | |
358 | if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev))) | |
359 | return -EINVAL; | |
360 | ||
361 | dev->mtu = new_mtu; | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) | |
367 | { | |
368 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
369 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
370 | struct bcast_packet *bcast_packet; | |
371 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 372 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
373 | int data_len = skb->len, ret; |
374 | short vid = -1; | |
375 | bool do_bcast = false; | |
376 | ||
377 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) | |
378 | goto dropped; | |
379 | ||
380 | soft_iface->trans_start = jiffies; | |
381 | ||
382 | switch (ntohs(ethhdr->h_proto)) { | |
383 | case ETH_P_8021Q: | |
384 | vhdr = (struct vlan_ethhdr *)skb->data; | |
385 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
386 | ||
387 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
388 | break; | |
389 | ||
390 | /* fall through */ | |
391 | case ETH_P_BATMAN: | |
392 | softif_batman_recv(skb, soft_iface, vid); | |
393 | goto end; | |
394 | } | |
395 | ||
396 | /** | |
397 | * if we have a another chosen mesh exit node in range | |
398 | * it will transport the packets to the mesh | |
399 | */ | |
ba85fac2 SW |
400 | curr_softif_neigh = softif_neigh_get_selected(bat_priv); |
401 | if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid)) | |
c6c8fea2 SE |
402 | goto dropped; |
403 | ||
404 | /* TODO: check this for locks */ | |
405 | hna_local_add(soft_iface, ethhdr->h_source); | |
406 | ||
407 | if (is_multicast_ether_addr(ethhdr->h_dest)) { | |
408 | ret = gw_is_target(bat_priv, skb); | |
409 | ||
410 | if (ret < 0) | |
411 | goto dropped; | |
412 | ||
413 | if (ret == 0) | |
414 | do_bcast = true; | |
415 | } | |
416 | ||
417 | /* ethernet packet should be broadcasted */ | |
418 | if (do_bcast) { | |
419 | if (!bat_priv->primary_if) | |
420 | goto dropped; | |
421 | ||
422 | if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0) | |
423 | goto dropped; | |
424 | ||
425 | bcast_packet = (struct bcast_packet *)skb->data; | |
426 | bcast_packet->version = COMPAT_VERSION; | |
427 | bcast_packet->ttl = TTL; | |
428 | ||
429 | /* batman packet type: broadcast */ | |
430 | bcast_packet->packet_type = BAT_BCAST; | |
431 | ||
432 | /* hw address of first interface is the orig mac because only | |
433 | * this mac is known throughout the mesh */ | |
434 | memcpy(bcast_packet->orig, | |
435 | bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN); | |
436 | ||
437 | /* set broadcast sequence number */ | |
438 | bcast_packet->seqno = | |
439 | htonl(atomic_inc_return(&bat_priv->bcast_seqno)); | |
440 | ||
441 | add_bcast_packet_to_list(bat_priv, skb); | |
442 | ||
443 | /* a copy is stored in the bcast list, therefore removing | |
444 | * the original skb. */ | |
445 | kfree_skb(skb); | |
446 | ||
447 | /* unicast packet */ | |
448 | } else { | |
449 | ret = unicast_send_skb(skb, bat_priv); | |
450 | if (ret != 0) | |
451 | goto dropped_freed; | |
452 | } | |
453 | ||
454 | bat_priv->stats.tx_packets++; | |
455 | bat_priv->stats.tx_bytes += data_len; | |
456 | goto end; | |
457 | ||
458 | dropped: | |
459 | kfree_skb(skb); | |
460 | dropped_freed: | |
461 | bat_priv->stats.tx_dropped++; | |
462 | end: | |
ba85fac2 SW |
463 | if (curr_softif_neigh) |
464 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
465 | return NETDEV_TX_OK; |
466 | } | |
467 | ||
468 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 469 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
470 | int hdr_size) |
471 | { | |
472 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
473 | struct unicast_packet *unicast_packet; | |
474 | struct ethhdr *ethhdr; | |
475 | struct vlan_ethhdr *vhdr; | |
ba85fac2 | 476 | struct softif_neigh *curr_softif_neigh = NULL; |
c6c8fea2 SE |
477 | short vid = -1; |
478 | int ret; | |
479 | ||
480 | /* check if enough space is available for pulling, and pull */ | |
481 | if (!pskb_may_pull(skb, hdr_size)) | |
482 | goto dropped; | |
483 | ||
484 | skb_pull_rcsum(skb, hdr_size); | |
485 | skb_reset_mac_header(skb); | |
486 | ||
487 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
488 | ||
489 | switch (ntohs(ethhdr->h_proto)) { | |
490 | case ETH_P_8021Q: | |
491 | vhdr = (struct vlan_ethhdr *)skb->data; | |
492 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
493 | ||
494 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
495 | break; | |
496 | ||
497 | /* fall through */ | |
498 | case ETH_P_BATMAN: | |
499 | goto dropped; | |
500 | } | |
501 | ||
502 | /** | |
503 | * if we have a another chosen mesh exit node in range | |
504 | * it will transport the packets to the non-mesh network | |
505 | */ | |
ba85fac2 SW |
506 | curr_softif_neigh = softif_neigh_get_selected(bat_priv); |
507 | if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) { | |
c6c8fea2 SE |
508 | skb_push(skb, hdr_size); |
509 | unicast_packet = (struct unicast_packet *)skb->data; | |
510 | ||
511 | if ((unicast_packet->packet_type != BAT_UNICAST) && | |
512 | (unicast_packet->packet_type != BAT_UNICAST_FRAG)) | |
513 | goto dropped; | |
514 | ||
515 | skb_reset_mac_header(skb); | |
516 | ||
517 | memcpy(unicast_packet->dest, | |
ba85fac2 | 518 | curr_softif_neigh->addr, ETH_ALEN); |
7cefb149 | 519 | ret = route_unicast_packet(skb, recv_if); |
c6c8fea2 SE |
520 | if (ret == NET_RX_DROP) |
521 | goto dropped; | |
522 | ||
523 | goto out; | |
524 | } | |
525 | ||
526 | /* skb->dev & skb->pkt_type are set here */ | |
527 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
528 | goto dropped; | |
529 | skb->protocol = eth_type_trans(skb, soft_iface); | |
530 | ||
25985edc | 531 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 SE |
532 | * TODO: please verify this and remove this TODO |
533 | * -- Dec 21st 2009, Simon Wunderlich */ | |
534 | ||
535 | /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ | |
536 | ||
537 | bat_priv->stats.rx_packets++; | |
538 | bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr); | |
539 | ||
540 | soft_iface->last_rx = jiffies; | |
541 | ||
542 | netif_rx(skb); | |
ba85fac2 | 543 | goto out; |
c6c8fea2 SE |
544 | |
545 | dropped: | |
546 | kfree_skb(skb); | |
547 | out: | |
ba85fac2 SW |
548 | if (curr_softif_neigh) |
549 | softif_neigh_free_ref(curr_softif_neigh); | |
c6c8fea2 SE |
550 | return; |
551 | } | |
552 | ||
553 | #ifdef HAVE_NET_DEVICE_OPS | |
554 | static const struct net_device_ops bat_netdev_ops = { | |
555 | .ndo_open = interface_open, | |
556 | .ndo_stop = interface_release, | |
557 | .ndo_get_stats = interface_stats, | |
558 | .ndo_set_mac_address = interface_set_mac_addr, | |
559 | .ndo_change_mtu = interface_change_mtu, | |
560 | .ndo_start_xmit = interface_tx, | |
561 | .ndo_validate_addr = eth_validate_addr | |
562 | }; | |
563 | #endif | |
564 | ||
565 | static void interface_setup(struct net_device *dev) | |
566 | { | |
567 | struct bat_priv *priv = netdev_priv(dev); | |
568 | char dev_addr[ETH_ALEN]; | |
569 | ||
570 | ether_setup(dev); | |
571 | ||
572 | #ifdef HAVE_NET_DEVICE_OPS | |
573 | dev->netdev_ops = &bat_netdev_ops; | |
574 | #else | |
575 | dev->open = interface_open; | |
576 | dev->stop = interface_release; | |
577 | dev->get_stats = interface_stats; | |
578 | dev->set_mac_address = interface_set_mac_addr; | |
579 | dev->change_mtu = interface_change_mtu; | |
580 | dev->hard_start_xmit = interface_tx; | |
581 | #endif | |
582 | dev->destructor = free_netdev; | |
af20b710 | 583 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
584 | |
585 | /** | |
586 | * can't call min_mtu, because the needed variables | |
587 | * have not been initialized yet | |
588 | */ | |
589 | dev->mtu = ETH_DATA_LEN; | |
590 | dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the | |
591 | * skbuff for our header */ | |
592 | ||
593 | /* generate random address */ | |
594 | random_ether_addr(dev_addr); | |
595 | memcpy(dev->dev_addr, dev_addr, ETH_ALEN); | |
596 | ||
597 | SET_ETHTOOL_OPS(dev, &bat_ethtool_ops); | |
598 | ||
599 | memset(priv, 0, sizeof(struct bat_priv)); | |
600 | } | |
601 | ||
602 | struct net_device *softif_create(char *name) | |
603 | { | |
604 | struct net_device *soft_iface; | |
605 | struct bat_priv *bat_priv; | |
606 | int ret; | |
607 | ||
608 | soft_iface = alloc_netdev(sizeof(struct bat_priv) , name, | |
609 | interface_setup); | |
610 | ||
611 | if (!soft_iface) { | |
612 | pr_err("Unable to allocate the batman interface: %s\n", name); | |
613 | goto out; | |
614 | } | |
615 | ||
616 | ret = register_netdev(soft_iface); | |
617 | if (ret < 0) { | |
618 | pr_err("Unable to register the batman interface '%s': %i\n", | |
619 | name, ret); | |
620 | goto free_soft_iface; | |
621 | } | |
622 | ||
623 | bat_priv = netdev_priv(soft_iface); | |
624 | ||
625 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
626 | atomic_set(&bat_priv->bonding, 0); | |
627 | atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); | |
628 | atomic_set(&bat_priv->gw_mode, GW_MODE_OFF); | |
629 | atomic_set(&bat_priv->gw_sel_class, 20); | |
630 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
631 | atomic_set(&bat_priv->orig_interval, 1000); | |
632 | atomic_set(&bat_priv->hop_penalty, 10); | |
633 | atomic_set(&bat_priv->log_level, 0); | |
634 | atomic_set(&bat_priv->fragmentation, 1); | |
635 | atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN); | |
636 | atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN); | |
637 | ||
638 | atomic_set(&bat_priv->mesh_state, MESH_INACTIVE); | |
639 | atomic_set(&bat_priv->bcast_seqno, 1); | |
640 | atomic_set(&bat_priv->hna_local_changed, 0); | |
641 | ||
642 | bat_priv->primary_if = NULL; | |
643 | bat_priv->num_ifaces = 0; | |
644 | bat_priv->softif_neigh = NULL; | |
645 | ||
646 | ret = sysfs_add_meshif(soft_iface); | |
647 | if (ret < 0) | |
648 | goto unreg_soft_iface; | |
649 | ||
650 | ret = debugfs_add_meshif(soft_iface); | |
651 | if (ret < 0) | |
652 | goto unreg_sysfs; | |
653 | ||
654 | ret = mesh_init(soft_iface); | |
655 | if (ret < 0) | |
656 | goto unreg_debugfs; | |
657 | ||
658 | return soft_iface; | |
659 | ||
660 | unreg_debugfs: | |
661 | debugfs_del_meshif(soft_iface); | |
662 | unreg_sysfs: | |
663 | sysfs_del_meshif(soft_iface); | |
664 | unreg_soft_iface: | |
665 | unregister_netdev(soft_iface); | |
666 | return NULL; | |
667 | ||
668 | free_soft_iface: | |
669 | free_netdev(soft_iface); | |
670 | out: | |
671 | return NULL; | |
672 | } | |
673 | ||
674 | void softif_destroy(struct net_device *soft_iface) | |
675 | { | |
676 | debugfs_del_meshif(soft_iface); | |
677 | sysfs_del_meshif(soft_iface); | |
678 | mesh_free(soft_iface); | |
679 | unregister_netdevice(soft_iface); | |
680 | } | |
681 | ||
e44d8fe2 SE |
682 | int softif_is_valid(struct net_device *net_dev) |
683 | { | |
684 | #ifdef HAVE_NET_DEVICE_OPS | |
685 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
686 | return 1; | |
687 | #else | |
688 | if (net_dev->hard_start_xmit == interface_tx) | |
689 | return 1; | |
690 | #endif | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
c6c8fea2 SE |
695 | /* ethtool */ |
696 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
697 | { | |
698 | cmd->supported = 0; | |
699 | cmd->advertising = 0; | |
700 | cmd->speed = SPEED_10; | |
701 | cmd->duplex = DUPLEX_FULL; | |
702 | cmd->port = PORT_TP; | |
703 | cmd->phy_address = 0; | |
704 | cmd->transceiver = XCVR_INTERNAL; | |
705 | cmd->autoneg = AUTONEG_DISABLE; | |
706 | cmd->maxtxpkt = 0; | |
707 | cmd->maxrxpkt = 0; | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static void bat_get_drvinfo(struct net_device *dev, | |
713 | struct ethtool_drvinfo *info) | |
714 | { | |
715 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
716 | strcpy(info->version, SOURCE_VERSION); | |
717 | strcpy(info->fw_version, "N/A"); | |
718 | strcpy(info->bus_info, "batman"); | |
719 | } | |
720 | ||
721 | static u32 bat_get_msglevel(struct net_device *dev) | |
722 | { | |
723 | return -EOPNOTSUPP; | |
724 | } | |
725 | ||
726 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
727 | { | |
728 | } | |
729 | ||
730 | static u32 bat_get_link(struct net_device *dev) | |
731 | { | |
732 | return 1; | |
733 | } | |
734 |