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0046b040 | 1 | /* Copyright (C) 2009-2016 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "gateway_client.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
22 | #include <linux/byteorder/generic.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/if_vlan.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/ip.h> | |
29 | #include <linux/ipv6.h> | |
1e2c2a4f | 30 | #include <linux/kernel.h> |
e7aed321 | 31 | #include <linux/kref.h> |
1e2c2a4f SE |
32 | #include <linux/list.h> |
33 | #include <linux/netdevice.h> | |
34 | #include <linux/rculist.h> | |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/seq_file.h> | |
37 | #include <linux/skbuff.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <linux/stddef.h> | |
41 | #include <linux/udp.h> | |
42 | ||
c6c8fea2 SE |
43 | #include "gateway_common.h" |
44 | #include "hard-interface.h" | |
57f0c07c | 45 | #include "originator.h" |
1e2c2a4f | 46 | #include "packet.h" |
43676ab5 | 47 | #include "routing.h" |
1e2c2a4f SE |
48 | #include "sysfs.h" |
49 | #include "translation-table.h" | |
c6c8fea2 | 50 | |
6c413b1c AQ |
51 | /* These are the offsets of the "hw type" and "hw address length" in the dhcp |
52 | * packet starting at the beginning of the dhcp header | |
9cfc7bd6 | 53 | */ |
6c413b1c AQ |
54 | #define BATADV_DHCP_HTYPE_OFFSET 1 |
55 | #define BATADV_DHCP_HLEN_OFFSET 2 | |
56 | /* Value of htype representing Ethernet */ | |
57 | #define BATADV_DHCP_HTYPE_ETHERNET 0x01 | |
58 | /* This is the offset of the "chaddr" field in the dhcp packet starting at the | |
59 | * beginning of the dhcp header | |
60 | */ | |
61 | #define BATADV_DHCP_CHADDR_OFFSET 28 | |
43676ab5 | 62 | |
e7aed321 SE |
63 | /** |
64 | * batadv_gw_node_release - release gw_node from lists and queue for free after | |
65 | * rcu grace period | |
66 | * @ref: kref pointer of the gw_node | |
67 | */ | |
68 | static void batadv_gw_node_release(struct kref *ref) | |
69 | { | |
70 | struct batadv_gw_node *gw_node; | |
71 | ||
72 | gw_node = container_of(ref, struct batadv_gw_node, refcount); | |
73 | ||
5d967310 | 74 | batadv_orig_node_put(gw_node->orig_node); |
e7aed321 SE |
75 | kfree_rcu(gw_node, rcu); |
76 | } | |
77 | ||
78 | /** | |
79 | * batadv_gw_node_free_ref - decrement the gw_node refcounter and possibly | |
80 | * release it | |
81 | * @gw_node: gateway node to free | |
82 | */ | |
56303d34 | 83 | static void batadv_gw_node_free_ref(struct batadv_gw_node *gw_node) |
c6c8fea2 | 84 | { |
e7aed321 | 85 | kref_put(&gw_node->refcount, batadv_gw_node_release); |
c6c8fea2 SE |
86 | } |
87 | ||
56303d34 SE |
88 | static struct batadv_gw_node * |
89 | batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv) | |
c6c8fea2 | 90 | { |
56303d34 | 91 | struct batadv_gw_node *gw_node; |
c6c8fea2 | 92 | |
5d02b3cd | 93 | rcu_read_lock(); |
807736f6 | 94 | gw_node = rcu_dereference(bat_priv->gw.curr_gw); |
c4aac1ab | 95 | if (!gw_node) |
7b36e8ee | 96 | goto out; |
c6c8fea2 | 97 | |
e7aed321 | 98 | if (!kref_get_unless_zero(&gw_node->refcount)) |
c4aac1ab | 99 | gw_node = NULL; |
43c70ad5 | 100 | |
5d02b3cd LL |
101 | out: |
102 | rcu_read_unlock(); | |
c4aac1ab | 103 | return gw_node; |
c6c8fea2 SE |
104 | } |
105 | ||
56303d34 SE |
106 | struct batadv_orig_node * |
107 | batadv_gw_get_selected_orig(struct batadv_priv *bat_priv) | |
c6c8fea2 | 108 | { |
56303d34 SE |
109 | struct batadv_gw_node *gw_node; |
110 | struct batadv_orig_node *orig_node = NULL; | |
c6c8fea2 | 111 | |
1409a834 | 112 | gw_node = batadv_gw_get_selected_gw_node(bat_priv); |
c4aac1ab ML |
113 | if (!gw_node) |
114 | goto out; | |
115 | ||
116 | rcu_read_lock(); | |
117 | orig_node = gw_node->orig_node; | |
118 | if (!orig_node) | |
119 | goto unlock; | |
120 | ||
7c124391 | 121 | if (!kref_get_unless_zero(&orig_node->refcount)) |
c4aac1ab | 122 | orig_node = NULL; |
c6c8fea2 | 123 | |
c4aac1ab ML |
124 | unlock: |
125 | rcu_read_unlock(); | |
126 | out: | |
c6c8fea2 | 127 | if (gw_node) |
1409a834 | 128 | batadv_gw_node_free_ref(gw_node); |
c4aac1ab | 129 | return orig_node; |
c6c8fea2 SE |
130 | } |
131 | ||
56303d34 SE |
132 | static void batadv_gw_select(struct batadv_priv *bat_priv, |
133 | struct batadv_gw_node *new_gw_node) | |
c6c8fea2 | 134 | { |
56303d34 | 135 | struct batadv_gw_node *curr_gw_node; |
c6c8fea2 | 136 | |
807736f6 | 137 | spin_lock_bh(&bat_priv->gw.list_lock); |
c4aac1ab | 138 | |
e7aed321 | 139 | if (new_gw_node && !kref_get_unless_zero(&new_gw_node->refcount)) |
25b6d3c1 | 140 | new_gw_node = NULL; |
c6c8fea2 | 141 | |
807736f6 SE |
142 | curr_gw_node = rcu_dereference_protected(bat_priv->gw.curr_gw, 1); |
143 | rcu_assign_pointer(bat_priv->gw.curr_gw, new_gw_node); | |
25b6d3c1 ML |
144 | |
145 | if (curr_gw_node) | |
1409a834 | 146 | batadv_gw_node_free_ref(curr_gw_node); |
c4aac1ab | 147 | |
807736f6 | 148 | spin_unlock_bh(&bat_priv->gw.list_lock); |
c4aac1ab ML |
149 | } |
150 | ||
4e820e72 AQ |
151 | /** |
152 | * batadv_gw_reselect - force a gateway reselection | |
153 | * @bat_priv: the bat priv with all the soft interface information | |
154 | * | |
155 | * Set a flag to remind the GW component to perform a new gateway reselection. | |
156 | * However this function does not ensure that the current gateway is going to be | |
157 | * deselected. The reselection mechanism may elect the same gateway once again. | |
158 | * | |
159 | * This means that invoking batadv_gw_reselect() does not guarantee a gateway | |
160 | * change and therefore a uevent is not necessarily expected. | |
161 | */ | |
162 | void batadv_gw_reselect(struct batadv_priv *bat_priv) | |
c4aac1ab | 163 | { |
807736f6 | 164 | atomic_set(&bat_priv->gw.reselect, 1); |
c6c8fea2 SE |
165 | } |
166 | ||
56303d34 SE |
167 | static struct batadv_gw_node * |
168 | batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
c6c8fea2 | 169 | { |
56303d34 | 170 | struct batadv_neigh_node *router; |
89652331 | 171 | struct batadv_neigh_ifinfo *router_ifinfo; |
56303d34 | 172 | struct batadv_gw_node *gw_node, *curr_gw = NULL; |
4f248cff SE |
173 | u64 max_gw_factor = 0; |
174 | u64 tmp_gw_factor = 0; | |
6b5e971a SE |
175 | u8 max_tq = 0; |
176 | u8 tq_avg; | |
56303d34 | 177 | struct batadv_orig_node *orig_node; |
c6c8fea2 | 178 | |
c4aac1ab | 179 | rcu_read_lock(); |
b67bfe0d | 180 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { |
84d5e5e0 | 181 | orig_node = gw_node->orig_node; |
7351a482 | 182 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); |
e1a5382f | 183 | if (!router) |
c6c8fea2 SE |
184 | continue; |
185 | ||
89652331 SW |
186 | router_ifinfo = batadv_neigh_ifinfo_get(router, |
187 | BATADV_IF_DEFAULT); | |
188 | if (!router_ifinfo) | |
189 | goto next; | |
190 | ||
e7aed321 | 191 | if (!kref_get_unless_zero(&gw_node->refcount)) |
2265c141 AQ |
192 | goto next; |
193 | ||
89652331 | 194 | tq_avg = router_ifinfo->bat_iv.tq_avg; |
c67893d1 | 195 | |
c6c8fea2 SE |
196 | switch (atomic_read(&bat_priv->gw_sel_class)) { |
197 | case 1: /* fast connection */ | |
414254e3 ML |
198 | tmp_gw_factor = tq_avg * tq_avg; |
199 | tmp_gw_factor *= gw_node->bandwidth_down; | |
200 | tmp_gw_factor *= 100 * 100; | |
e071d93e | 201 | tmp_gw_factor >>= 18; |
c6c8fea2 SE |
202 | |
203 | if ((tmp_gw_factor > max_gw_factor) || | |
204 | ((tmp_gw_factor == max_gw_factor) && | |
c67893d1 | 205 | (tq_avg > max_tq))) { |
2265c141 | 206 | if (curr_gw) |
1409a834 | 207 | batadv_gw_node_free_ref(curr_gw); |
2265c141 | 208 | curr_gw = gw_node; |
e7aed321 | 209 | kref_get(&curr_gw->refcount); |
2265c141 | 210 | } |
c6c8fea2 SE |
211 | break; |
212 | ||
9cfc7bd6 | 213 | default: /* 2: stable connection (use best statistic) |
c6c8fea2 SE |
214 | * 3: fast-switch (use best statistic but change as |
215 | * soon as a better gateway appears) | |
216 | * XX: late-switch (use best statistic but change as | |
217 | * soon as a better gateway appears which has | |
218 | * $routing_class more tq points) | |
9cfc7bd6 | 219 | */ |
c67893d1 | 220 | if (tq_avg > max_tq) { |
2265c141 | 221 | if (curr_gw) |
1409a834 | 222 | batadv_gw_node_free_ref(curr_gw); |
2265c141 | 223 | curr_gw = gw_node; |
e7aed321 | 224 | kref_get(&curr_gw->refcount); |
2265c141 | 225 | } |
c6c8fea2 SE |
226 | break; |
227 | } | |
228 | ||
c67893d1 SE |
229 | if (tq_avg > max_tq) |
230 | max_tq = tq_avg; | |
c6c8fea2 SE |
231 | |
232 | if (tmp_gw_factor > max_gw_factor) | |
233 | max_gw_factor = tmp_gw_factor; | |
e1a5382f | 234 | |
1409a834 | 235 | batadv_gw_node_free_ref(gw_node); |
2265c141 AQ |
236 | |
237 | next: | |
25bb2509 | 238 | batadv_neigh_node_put(router); |
89652331 SW |
239 | if (router_ifinfo) |
240 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
c6c8fea2 | 241 | } |
2265c141 | 242 | rcu_read_unlock(); |
c6c8fea2 | 243 | |
2265c141 AQ |
244 | return curr_gw; |
245 | } | |
c6c8fea2 | 246 | |
c6eaa3f0 AQ |
247 | /** |
248 | * batadv_gw_check_client_stop - check if client mode has been switched off | |
249 | * @bat_priv: the bat priv with all the soft interface information | |
250 | * | |
251 | * This function assumes the caller has checked that the gw state *is actually | |
252 | * changing*. This function is not supposed to be called when there is no state | |
253 | * change. | |
254 | */ | |
255 | void batadv_gw_check_client_stop(struct batadv_priv *bat_priv) | |
256 | { | |
257 | struct batadv_gw_node *curr_gw; | |
258 | ||
259 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) | |
260 | return; | |
261 | ||
262 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
263 | if (!curr_gw) | |
264 | return; | |
265 | ||
f3163181 AQ |
266 | /* deselect the current gateway so that next time that client mode is |
267 | * enabled a proper GW_ADD event can be sent | |
268 | */ | |
269 | batadv_gw_select(bat_priv, NULL); | |
270 | ||
c6eaa3f0 AQ |
271 | /* if batman-adv is switching the gw client mode off and a gateway was |
272 | * already selected, send a DEL uevent | |
273 | */ | |
274 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, NULL); | |
275 | ||
276 | batadv_gw_node_free_ref(curr_gw); | |
277 | } | |
278 | ||
56303d34 | 279 | void batadv_gw_election(struct batadv_priv *bat_priv) |
2265c141 | 280 | { |
4f248cff SE |
281 | struct batadv_gw_node *curr_gw = NULL; |
282 | struct batadv_gw_node *next_gw = NULL; | |
56303d34 | 283 | struct batadv_neigh_node *router = NULL; |
89652331 | 284 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
19595e05 | 285 | char gw_addr[18] = { '\0' }; |
2265c141 | 286 | |
cd646ab1 | 287 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) |
2265c141 AQ |
288 | goto out; |
289 | ||
1409a834 | 290 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
2265c141 | 291 | |
807736f6 | 292 | if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw) |
caa0bf64 ML |
293 | goto out; |
294 | ||
1409a834 | 295 | next_gw = batadv_gw_get_best_gw_node(bat_priv); |
2265c141 AQ |
296 | |
297 | if (curr_gw == next_gw) | |
298 | goto out; | |
299 | ||
300 | if (next_gw) { | |
19595e05 AQ |
301 | sprintf(gw_addr, "%pM", next_gw->orig_node->orig); |
302 | ||
7351a482 SW |
303 | router = batadv_orig_router_get(next_gw->orig_node, |
304 | BATADV_IF_DEFAULT); | |
2265c141 | 305 | if (!router) { |
4e820e72 | 306 | batadv_gw_reselect(bat_priv); |
2265c141 AQ |
307 | goto out; |
308 | } | |
89652331 SW |
309 | |
310 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
311 | BATADV_IF_DEFAULT); | |
312 | if (!router_ifinfo) { | |
313 | batadv_gw_reselect(bat_priv); | |
314 | goto out; | |
315 | } | |
c6c8fea2 SE |
316 | } |
317 | ||
2265c141 | 318 | if ((curr_gw) && (!next_gw)) { |
39c75a51 | 319 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 320 | "Removing selected gateway - no gateway in range\n"); |
39c75a51 SE |
321 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, |
322 | NULL); | |
2265c141 | 323 | } else if ((!curr_gw) && (next_gw)) { |
39c75a51 | 324 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 | 325 | "Adding route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
1eda58bf | 326 | next_gw->orig_node->orig, |
414254e3 ML |
327 | next_gw->bandwidth_down / 10, |
328 | next_gw->bandwidth_down % 10, | |
329 | next_gw->bandwidth_up / 10, | |
89652331 SW |
330 | next_gw->bandwidth_up % 10, |
331 | router_ifinfo->bat_iv.tq_avg); | |
39c75a51 SE |
332 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, |
333 | gw_addr); | |
2265c141 | 334 | } else { |
39c75a51 | 335 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 | 336 | "Changing route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
1eda58bf | 337 | next_gw->orig_node->orig, |
414254e3 ML |
338 | next_gw->bandwidth_down / 10, |
339 | next_gw->bandwidth_down % 10, | |
340 | next_gw->bandwidth_up / 10, | |
89652331 SW |
341 | next_gw->bandwidth_up % 10, |
342 | router_ifinfo->bat_iv.tq_avg); | |
39c75a51 SE |
343 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE, |
344 | gw_addr); | |
2265c141 AQ |
345 | } |
346 | ||
1409a834 | 347 | batadv_gw_select(bat_priv, next_gw); |
2265c141 | 348 | |
c4aac1ab ML |
349 | out: |
350 | if (curr_gw) | |
1409a834 | 351 | batadv_gw_node_free_ref(curr_gw); |
2265c141 | 352 | if (next_gw) |
1409a834 | 353 | batadv_gw_node_free_ref(next_gw); |
2265c141 | 354 | if (router) |
25bb2509 | 355 | batadv_neigh_node_put(router); |
89652331 SW |
356 | if (router_ifinfo) |
357 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
c6c8fea2 SE |
358 | } |
359 | ||
56303d34 SE |
360 | void batadv_gw_check_election(struct batadv_priv *bat_priv, |
361 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 362 | { |
89652331 SW |
363 | struct batadv_neigh_ifinfo *router_orig_tq = NULL; |
364 | struct batadv_neigh_ifinfo *router_gw_tq = NULL; | |
56303d34 | 365 | struct batadv_orig_node *curr_gw_orig; |
4f248cff SE |
366 | struct batadv_neigh_node *router_gw = NULL; |
367 | struct batadv_neigh_node *router_orig = NULL; | |
6b5e971a | 368 | u8 gw_tq_avg, orig_tq_avg; |
c6c8fea2 | 369 | |
7cf06bc6 | 370 | curr_gw_orig = batadv_gw_get_selected_orig(bat_priv); |
57f0c07c | 371 | if (!curr_gw_orig) |
4e820e72 | 372 | goto reselect; |
c6c8fea2 | 373 | |
7351a482 | 374 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); |
e1a5382f | 375 | if (!router_gw) |
4e820e72 | 376 | goto reselect; |
c6c8fea2 | 377 | |
89652331 SW |
378 | router_gw_tq = batadv_neigh_ifinfo_get(router_gw, |
379 | BATADV_IF_DEFAULT); | |
380 | if (!router_gw_tq) | |
381 | goto reselect; | |
382 | ||
c6c8fea2 | 383 | /* this node already is the gateway */ |
57f0c07c | 384 | if (curr_gw_orig == orig_node) |
e1a5382f | 385 | goto out; |
c6c8fea2 | 386 | |
7351a482 | 387 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); |
e1a5382f LL |
388 | if (!router_orig) |
389 | goto out; | |
5d02b3cd | 390 | |
89652331 SW |
391 | router_orig_tq = batadv_neigh_ifinfo_get(router_orig, |
392 | BATADV_IF_DEFAULT); | |
393 | if (!router_orig_tq) | |
394 | goto out; | |
395 | ||
396 | gw_tq_avg = router_gw_tq->bat_iv.tq_avg; | |
397 | orig_tq_avg = router_orig_tq->bat_iv.tq_avg; | |
c6c8fea2 SE |
398 | |
399 | /* the TQ value has to be better */ | |
400 | if (orig_tq_avg < gw_tq_avg) | |
5d02b3cd | 401 | goto out; |
c6c8fea2 | 402 | |
9cfc7bd6 | 403 | /* if the routing class is greater than 3 the value tells us how much |
c6c8fea2 | 404 | * greater the TQ value of the new gateway must be |
9cfc7bd6 | 405 | */ |
c6c8fea2 SE |
406 | if ((atomic_read(&bat_priv->gw_sel_class) > 3) && |
407 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw_sel_class))) | |
5d02b3cd | 408 | goto out; |
c6c8fea2 | 409 | |
39c75a51 | 410 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
411 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", |
412 | gw_tq_avg, orig_tq_avg); | |
c6c8fea2 | 413 | |
4e820e72 AQ |
414 | reselect: |
415 | batadv_gw_reselect(bat_priv); | |
5d02b3cd | 416 | out: |
57f0c07c | 417 | if (curr_gw_orig) |
5d967310 | 418 | batadv_orig_node_put(curr_gw_orig); |
e1a5382f | 419 | if (router_gw) |
25bb2509 | 420 | batadv_neigh_node_put(router_gw); |
e1a5382f | 421 | if (router_orig) |
25bb2509 | 422 | batadv_neigh_node_put(router_orig); |
89652331 SW |
423 | if (router_gw_tq) |
424 | batadv_neigh_ifinfo_free_ref(router_gw_tq); | |
425 | if (router_orig_tq) | |
426 | batadv_neigh_ifinfo_free_ref(router_orig_tq); | |
c6c8fea2 SE |
427 | } |
428 | ||
414254e3 ML |
429 | /** |
430 | * batadv_gw_node_add - add gateway node to list of available gateways | |
431 | * @bat_priv: the bat priv with all the soft interface information | |
432 | * @orig_node: originator announcing gateway capabilities | |
433 | * @gateway: announced bandwidth information | |
434 | */ | |
56303d34 SE |
435 | static void batadv_gw_node_add(struct batadv_priv *bat_priv, |
436 | struct batadv_orig_node *orig_node, | |
414254e3 | 437 | struct batadv_tvlv_gateway_data *gateway) |
c6c8fea2 | 438 | { |
56303d34 | 439 | struct batadv_gw_node *gw_node; |
414254e3 ML |
440 | |
441 | if (gateway->bandwidth_down == 0) | |
442 | return; | |
c6c8fea2 | 443 | |
7c124391 | 444 | if (!kref_get_unless_zero(&orig_node->refcount)) |
377fe0f9 AQ |
445 | return; |
446 | ||
704509b8 | 447 | gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC); |
377fe0f9 | 448 | if (!gw_node) { |
5d967310 | 449 | batadv_orig_node_put(orig_node); |
c6c8fea2 | 450 | return; |
377fe0f9 | 451 | } |
c6c8fea2 | 452 | |
c6c8fea2 SE |
453 | INIT_HLIST_NODE(&gw_node->list); |
454 | gw_node->orig_node = orig_node; | |
27a4d5ef SW |
455 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); |
456 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); | |
e7aed321 | 457 | kref_init(&gw_node->refcount); |
c6c8fea2 | 458 | |
807736f6 SE |
459 | spin_lock_bh(&bat_priv->gw.list_lock); |
460 | hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list); | |
461 | spin_unlock_bh(&bat_priv->gw.list_lock); | |
c6c8fea2 | 462 | |
39c75a51 | 463 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 ML |
464 | "Found new gateway %pM -> gw bandwidth: %u.%u/%u.%u MBit\n", |
465 | orig_node->orig, | |
466 | ntohl(gateway->bandwidth_down) / 10, | |
467 | ntohl(gateway->bandwidth_down) % 10, | |
468 | ntohl(gateway->bandwidth_up) / 10, | |
469 | ntohl(gateway->bandwidth_up) % 10); | |
c6c8fea2 SE |
470 | } |
471 | ||
414254e3 ML |
472 | /** |
473 | * batadv_gw_node_get - retrieve gateway node from list of available gateways | |
474 | * @bat_priv: the bat priv with all the soft interface information | |
475 | * @orig_node: originator announcing gateway capabilities | |
476 | * | |
62fe710f | 477 | * Return: gateway node if found or NULL otherwise. |
414254e3 ML |
478 | */ |
479 | static struct batadv_gw_node * | |
480 | batadv_gw_node_get(struct batadv_priv *bat_priv, | |
481 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 482 | { |
414254e3 | 483 | struct batadv_gw_node *gw_node_tmp, *gw_node = NULL; |
c6c8fea2 SE |
484 | |
485 | rcu_read_lock(); | |
414254e3 ML |
486 | hlist_for_each_entry_rcu(gw_node_tmp, &bat_priv->gw.list, list) { |
487 | if (gw_node_tmp->orig_node != orig_node) | |
c6c8fea2 SE |
488 | continue; |
489 | ||
e7aed321 | 490 | if (!kref_get_unless_zero(&gw_node_tmp->refcount)) |
414254e3 | 491 | continue; |
c6c8fea2 | 492 | |
414254e3 ML |
493 | gw_node = gw_node_tmp; |
494 | break; | |
495 | } | |
496 | rcu_read_unlock(); | |
c6c8fea2 | 497 | |
414254e3 ML |
498 | return gw_node; |
499 | } | |
c6c8fea2 | 500 | |
414254e3 ML |
501 | /** |
502 | * batadv_gw_node_update - update list of available gateways with changed | |
503 | * bandwidth information | |
504 | * @bat_priv: the bat priv with all the soft interface information | |
505 | * @orig_node: originator announcing gateway capabilities | |
506 | * @gateway: announced bandwidth information | |
507 | */ | |
508 | void batadv_gw_node_update(struct batadv_priv *bat_priv, | |
509 | struct batadv_orig_node *orig_node, | |
510 | struct batadv_tvlv_gateway_data *gateway) | |
511 | { | |
512 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
513 | ||
514 | gw_node = batadv_gw_node_get(bat_priv, orig_node); | |
515 | if (!gw_node) { | |
516 | batadv_gw_node_add(bat_priv, orig_node, gateway); | |
517 | goto out; | |
c6c8fea2 | 518 | } |
c6c8fea2 | 519 | |
414254e3 ML |
520 | if ((gw_node->bandwidth_down == ntohl(gateway->bandwidth_down)) && |
521 | (gw_node->bandwidth_up == ntohl(gateway->bandwidth_up))) | |
522 | goto out; | |
c6c8fea2 | 523 | |
414254e3 ML |
524 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
525 | "Gateway bandwidth of originator %pM changed from %u.%u/%u.%u MBit to %u.%u/%u.%u MBit\n", | |
526 | orig_node->orig, | |
527 | gw_node->bandwidth_down / 10, | |
528 | gw_node->bandwidth_down % 10, | |
529 | gw_node->bandwidth_up / 10, | |
530 | gw_node->bandwidth_up % 10, | |
531 | ntohl(gateway->bandwidth_down) / 10, | |
532 | ntohl(gateway->bandwidth_down) % 10, | |
533 | ntohl(gateway->bandwidth_up) / 10, | |
534 | ntohl(gateway->bandwidth_up) % 10); | |
535 | ||
536 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); | |
537 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); | |
538 | ||
414254e3 | 539 | if (ntohl(gateway->bandwidth_down) == 0) { |
414254e3 ML |
540 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
541 | "Gateway %pM removed from gateway list\n", | |
542 | orig_node->orig); | |
c4aac1ab | 543 | |
414254e3 ML |
544 | /* Note: We don't need a NULL check here, since curr_gw never |
545 | * gets dereferenced. | |
546 | */ | |
bd3524c1 | 547 | spin_lock_bh(&bat_priv->gw.list_lock); |
c18bdd01 SE |
548 | if (!hlist_unhashed(&gw_node->list)) { |
549 | hlist_del_init_rcu(&gw_node->list); | |
550 | batadv_gw_node_free_ref(gw_node); | |
551 | } | |
bd3524c1 SW |
552 | spin_unlock_bh(&bat_priv->gw.list_lock); |
553 | ||
414254e3 ML |
554 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
555 | if (gw_node == curr_gw) | |
4e820e72 | 556 | batadv_gw_reselect(bat_priv); |
bd3524c1 SW |
557 | |
558 | if (curr_gw) | |
559 | batadv_gw_node_free_ref(curr_gw); | |
414254e3 | 560 | } |
71e4aa9c | 561 | |
414254e3 | 562 | out: |
414254e3 ML |
563 | if (gw_node) |
564 | batadv_gw_node_free_ref(gw_node); | |
c6c8fea2 SE |
565 | } |
566 | ||
56303d34 SE |
567 | void batadv_gw_node_delete(struct batadv_priv *bat_priv, |
568 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 569 | { |
414254e3 ML |
570 | struct batadv_tvlv_gateway_data gateway; |
571 | ||
572 | gateway.bandwidth_down = 0; | |
573 | gateway.bandwidth_up = 0; | |
574 | ||
575 | batadv_gw_node_update(bat_priv, orig_node, &gateway); | |
c6c8fea2 SE |
576 | } |
577 | ||
bd3524c1 | 578 | void batadv_gw_node_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 579 | { |
bd3524c1 | 580 | struct batadv_gw_node *gw_node; |
b67bfe0d | 581 | struct hlist_node *node_tmp; |
c6c8fea2 | 582 | |
807736f6 | 583 | spin_lock_bh(&bat_priv->gw.list_lock); |
b67bfe0d | 584 | hlist_for_each_entry_safe(gw_node, node_tmp, |
807736f6 | 585 | &bat_priv->gw.list, list) { |
bd3524c1 | 586 | hlist_del_init_rcu(&gw_node->list); |
1409a834 | 587 | batadv_gw_node_free_ref(gw_node); |
c6c8fea2 | 588 | } |
807736f6 | 589 | spin_unlock_bh(&bat_priv->gw.list_lock); |
c6c8fea2 SE |
590 | } |
591 | ||
9cfc7bd6 | 592 | /* fails if orig_node has no router */ |
56303d34 SE |
593 | static int batadv_write_buffer_text(struct batadv_priv *bat_priv, |
594 | struct seq_file *seq, | |
595 | const struct batadv_gw_node *gw_node) | |
c6c8fea2 | 596 | { |
56303d34 SE |
597 | struct batadv_gw_node *curr_gw; |
598 | struct batadv_neigh_node *router; | |
89652331 | 599 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
414254e3 | 600 | int ret = -1; |
c6c8fea2 | 601 | |
7351a482 | 602 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); |
e1a5382f LL |
603 | if (!router) |
604 | goto out; | |
5d02b3cd | 605 | |
89652331 SW |
606 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); |
607 | if (!router_ifinfo) | |
608 | goto out; | |
609 | ||
1409a834 | 610 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
5d02b3cd | 611 | |
6d91147d JP |
612 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", |
613 | (curr_gw == gw_node ? "=>" : " "), | |
614 | gw_node->orig_node->orig, | |
615 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
616 | router->if_incoming->net_dev->name, | |
617 | gw_node->bandwidth_down / 10, | |
618 | gw_node->bandwidth_down % 10, | |
619 | gw_node->bandwidth_up / 10, | |
620 | gw_node->bandwidth_up % 10); | |
92b83917 | 621 | ret = seq_has_overflowed(seq) ? -1 : 0; |
5d02b3cd | 622 | |
c4aac1ab | 623 | if (curr_gw) |
1409a834 | 624 | batadv_gw_node_free_ref(curr_gw); |
e1a5382f | 625 | out: |
89652331 SW |
626 | if (router_ifinfo) |
627 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
628 | if (router) | |
25bb2509 | 629 | batadv_neigh_node_put(router); |
5d02b3cd | 630 | return ret; |
c6c8fea2 SE |
631 | } |
632 | ||
7cf06bc6 | 633 | int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
634 | { |
635 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 SE |
636 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
637 | struct batadv_hard_iface *primary_if; | |
638 | struct batadv_gw_node *gw_node; | |
30da63a6 | 639 | int gw_count = 0; |
c6c8fea2 | 640 | |
30da63a6 ML |
641 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
642 | if (!primary_if) | |
32ae9b22 | 643 | goto out; |
c6c8fea2 | 644 | |
86ceb360 | 645 | seq_printf(seq, |
414254e3 | 646 | " %-12s (%s/%i) %17s [%10s]: advertised uplink bandwidth ... [B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n", |
42d0b044 SE |
647 | "Gateway", "#", BATADV_TQ_MAX_VALUE, "Nexthop", "outgoingIF", |
648 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
32ae9b22 | 649 | primary_if->net_dev->dev_addr, net_dev->name); |
c6c8fea2 SE |
650 | |
651 | rcu_read_lock(); | |
b67bfe0d | 652 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { |
e1a5382f | 653 | /* fails if orig_node has no router */ |
1409a834 | 654 | if (batadv_write_buffer_text(bat_priv, seq, gw_node) < 0) |
c6c8fea2 SE |
655 | continue; |
656 | ||
c6c8fea2 SE |
657 | gw_count++; |
658 | } | |
659 | rcu_read_unlock(); | |
660 | ||
661 | if (gw_count == 0) | |
0c814653 | 662 | seq_puts(seq, "No gateways in range ...\n"); |
c6c8fea2 | 663 | |
32ae9b22 ML |
664 | out: |
665 | if (primary_if) | |
82047ad7 | 666 | batadv_hardif_put(primary_if); |
30da63a6 | 667 | return 0; |
c6c8fea2 SE |
668 | } |
669 | ||
6c413b1c AQ |
670 | /** |
671 | * batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message | |
672 | * @skb: the packet to check | |
673 | * @header_len: a pointer to the batman-adv header size | |
674 | * @chaddr: buffer where the client address will be stored. Valid | |
675 | * only if the function returns BATADV_DHCP_TO_CLIENT | |
676 | * | |
62fe710f SE |
677 | * This function may re-allocate the data buffer of the skb passed as argument. |
678 | * | |
679 | * Return: | |
6c413b1c AQ |
680 | * - BATADV_DHCP_NO if the packet is not a dhcp message or if there was an error |
681 | * while parsing it | |
682 | * - BATADV_DHCP_TO_SERVER if this is a message going to the DHCP server | |
683 | * - BATADV_DHCP_TO_CLIENT if this is a message going to a DHCP client | |
6c413b1c AQ |
684 | */ |
685 | enum batadv_dhcp_recipient | |
686 | batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, | |
6b5e971a | 687 | u8 *chaddr) |
c6c8fea2 | 688 | { |
6c413b1c | 689 | enum batadv_dhcp_recipient ret = BATADV_DHCP_NO; |
c6c8fea2 SE |
690 | struct ethhdr *ethhdr; |
691 | struct iphdr *iphdr; | |
692 | struct ipv6hdr *ipv6hdr; | |
693 | struct udphdr *udphdr; | |
f7f8ed56 | 694 | struct vlan_ethhdr *vhdr; |
6c413b1c | 695 | int chaddr_offset; |
f7f8ed56 | 696 | __be16 proto; |
6b5e971a | 697 | u8 *p; |
c6c8fea2 SE |
698 | |
699 | /* check for ethernet header */ | |
be7af5cf | 700 | if (!pskb_may_pull(skb, *header_len + ETH_HLEN)) |
6c413b1c AQ |
701 | return BATADV_DHCP_NO; |
702 | ||
927c2ed7 | 703 | ethhdr = eth_hdr(skb); |
f7f8ed56 | 704 | proto = ethhdr->h_proto; |
be7af5cf | 705 | *header_len += ETH_HLEN; |
c6c8fea2 SE |
706 | |
707 | /* check for initial vlan header */ | |
f7f8ed56 | 708 | if (proto == htons(ETH_P_8021Q)) { |
be7af5cf | 709 | if (!pskb_may_pull(skb, *header_len + VLAN_HLEN)) |
6c413b1c | 710 | return BATADV_DHCP_NO; |
f7f8ed56 | 711 | |
927c2ed7 | 712 | vhdr = vlan_eth_hdr(skb); |
f7f8ed56 | 713 | proto = vhdr->h_vlan_encapsulated_proto; |
be7af5cf | 714 | *header_len += VLAN_HLEN; |
c6c8fea2 SE |
715 | } |
716 | ||
717 | /* check for ip header */ | |
f7f8ed56 AQ |
718 | switch (proto) { |
719 | case htons(ETH_P_IP): | |
be7af5cf | 720 | if (!pskb_may_pull(skb, *header_len + sizeof(*iphdr))) |
6c413b1c AQ |
721 | return BATADV_DHCP_NO; |
722 | ||
be7af5cf ML |
723 | iphdr = (struct iphdr *)(skb->data + *header_len); |
724 | *header_len += iphdr->ihl * 4; | |
c6c8fea2 SE |
725 | |
726 | /* check for udp header */ | |
727 | if (iphdr->protocol != IPPROTO_UDP) | |
6c413b1c | 728 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
729 | |
730 | break; | |
f7f8ed56 | 731 | case htons(ETH_P_IPV6): |
be7af5cf | 732 | if (!pskb_may_pull(skb, *header_len + sizeof(*ipv6hdr))) |
6c413b1c AQ |
733 | return BATADV_DHCP_NO; |
734 | ||
be7af5cf ML |
735 | ipv6hdr = (struct ipv6hdr *)(skb->data + *header_len); |
736 | *header_len += sizeof(*ipv6hdr); | |
c6c8fea2 SE |
737 | |
738 | /* check for udp header */ | |
739 | if (ipv6hdr->nexthdr != IPPROTO_UDP) | |
6c413b1c | 740 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
741 | |
742 | break; | |
743 | default: | |
6c413b1c | 744 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
745 | } |
746 | ||
be7af5cf | 747 | if (!pskb_may_pull(skb, *header_len + sizeof(*udphdr))) |
6c413b1c | 748 | return BATADV_DHCP_NO; |
9d2c9488 | 749 | |
be7af5cf ML |
750 | udphdr = (struct udphdr *)(skb->data + *header_len); |
751 | *header_len += sizeof(*udphdr); | |
c6c8fea2 SE |
752 | |
753 | /* check for bootp port */ | |
6c413b1c AQ |
754 | switch (proto) { |
755 | case htons(ETH_P_IP): | |
756 | if (udphdr->dest == htons(67)) | |
757 | ret = BATADV_DHCP_TO_SERVER; | |
758 | else if (udphdr->source == htons(67)) | |
759 | ret = BATADV_DHCP_TO_CLIENT; | |
760 | break; | |
761 | case htons(ETH_P_IPV6): | |
762 | if (udphdr->dest == htons(547)) | |
763 | ret = BATADV_DHCP_TO_SERVER; | |
764 | else if (udphdr->source == htons(547)) | |
765 | ret = BATADV_DHCP_TO_CLIENT; | |
766 | break; | |
767 | } | |
c6c8fea2 | 768 | |
6c413b1c AQ |
769 | chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET; |
770 | /* store the client address if the message is going to a client */ | |
771 | if (ret == BATADV_DHCP_TO_CLIENT && | |
772 | pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) { | |
773 | /* check if the DHCP packet carries an Ethernet DHCP */ | |
774 | p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET; | |
775 | if (*p != BATADV_DHCP_HTYPE_ETHERNET) | |
776 | return BATADV_DHCP_NO; | |
777 | ||
778 | /* check if the DHCP packet carries a valid Ethernet address */ | |
779 | p = skb->data + *header_len + BATADV_DHCP_HLEN_OFFSET; | |
780 | if (*p != ETH_ALEN) | |
781 | return BATADV_DHCP_NO; | |
782 | ||
8fdd0153 | 783 | ether_addr_copy(chaddr, skb->data + chaddr_offset); |
6c413b1c | 784 | } |
c6c8fea2 | 785 | |
6c413b1c | 786 | return ret; |
be7af5cf | 787 | } |
aa143d28 | 788 | |
bbb877ed AQ |
789 | /** |
790 | * batadv_gw_out_of_range - check if the dhcp request destination is the best gw | |
791 | * @bat_priv: the bat priv with all the soft interface information | |
792 | * @skb: the outgoing packet | |
793 | * | |
794 | * Check if the skb is a DHCP request and if it is sent to the current best GW | |
795 | * server. Due to topology changes it may be the case that the GW server | |
796 | * previously selected is not the best one anymore. | |
797 | * | |
bbb877ed | 798 | * This call might reallocate skb data. |
6c413b1c | 799 | * Must be invoked only when the DHCP packet is going TO a DHCP SERVER. |
62fe710f SE |
800 | * |
801 | * Return: true if the packet destination is unicast and it is not the best gw, | |
802 | * false otherwise. | |
bbb877ed | 803 | */ |
56303d34 | 804 | bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, |
9d2c9488 | 805 | struct sk_buff *skb) |
be7af5cf | 806 | { |
4f248cff SE |
807 | struct batadv_neigh_node *neigh_curr = NULL; |
808 | struct batadv_neigh_node *neigh_old = NULL; | |
56303d34 | 809 | struct batadv_orig_node *orig_dst_node = NULL; |
4f248cff SE |
810 | struct batadv_gw_node *gw_node = NULL; |
811 | struct batadv_gw_node *curr_gw = NULL; | |
89652331 | 812 | struct batadv_neigh_ifinfo *curr_ifinfo, *old_ifinfo; |
6c413b1c AQ |
813 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
814 | bool out_of_range = false; | |
6b5e971a | 815 | u8 curr_tq_avg; |
bbb877ed AQ |
816 | unsigned short vid; |
817 | ||
818 | vid = batadv_get_vid(skb, 0); | |
be7af5cf | 819 | |
08c36d3e | 820 | orig_dst_node = batadv_transtable_search(bat_priv, ethhdr->h_source, |
bbb877ed | 821 | ethhdr->h_dest, vid); |
be7af5cf ML |
822 | if (!orig_dst_node) |
823 | goto out; | |
824 | ||
414254e3 | 825 | gw_node = batadv_gw_node_get(bat_priv, orig_dst_node); |
0d164491 | 826 | if (!gw_node) |
be7af5cf ML |
827 | goto out; |
828 | ||
be7af5cf | 829 | switch (atomic_read(&bat_priv->gw_mode)) { |
cd646ab1 | 830 | case BATADV_GW_MODE_SERVER: |
be7af5cf | 831 | /* If we are a GW then we are our best GW. We can artificially |
9cfc7bd6 SE |
832 | * set the tq towards ourself as the maximum value |
833 | */ | |
42d0b044 | 834 | curr_tq_avg = BATADV_TQ_MAX_VALUE; |
be7af5cf | 835 | break; |
cd646ab1 | 836 | case BATADV_GW_MODE_CLIENT: |
1409a834 | 837 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
be7af5cf ML |
838 | if (!curr_gw) |
839 | goto out; | |
840 | ||
841 | /* packet is going to our gateway */ | |
842 | if (curr_gw->orig_node == orig_dst_node) | |
843 | goto out; | |
844 | ||
845 | /* If the dhcp packet has been sent to a different gw, | |
846 | * we have to evaluate whether the old gw is still | |
9cfc7bd6 SE |
847 | * reliable enough |
848 | */ | |
30d3c511 SE |
849 | neigh_curr = batadv_find_router(bat_priv, curr_gw->orig_node, |
850 | NULL); | |
be7af5cf ML |
851 | if (!neigh_curr) |
852 | goto out; | |
853 | ||
89652331 SW |
854 | curr_ifinfo = batadv_neigh_ifinfo_get(neigh_curr, |
855 | BATADV_IF_DEFAULT); | |
856 | if (!curr_ifinfo) | |
857 | goto out; | |
858 | ||
859 | curr_tq_avg = curr_ifinfo->bat_iv.tq_avg; | |
860 | batadv_neigh_ifinfo_free_ref(curr_ifinfo); | |
861 | ||
be7af5cf | 862 | break; |
cd646ab1 | 863 | case BATADV_GW_MODE_OFF: |
be7af5cf ML |
864 | default: |
865 | goto out; | |
43676ab5 | 866 | } |
be7af5cf | 867 | |
30d3c511 | 868 | neigh_old = batadv_find_router(bat_priv, orig_dst_node, NULL); |
2ef04f47 | 869 | if (!neigh_old) |
be7af5cf ML |
870 | goto out; |
871 | ||
89652331 SW |
872 | old_ifinfo = batadv_neigh_ifinfo_get(neigh_old, BATADV_IF_DEFAULT); |
873 | if (!old_ifinfo) | |
874 | goto out; | |
875 | ||
876 | if ((curr_tq_avg - old_ifinfo->bat_iv.tq_avg) > BATADV_GW_THRESHOLD) | |
be7af5cf | 877 | out_of_range = true; |
89652331 | 878 | batadv_neigh_ifinfo_free_ref(old_ifinfo); |
be7af5cf ML |
879 | |
880 | out: | |
881 | if (orig_dst_node) | |
5d967310 | 882 | batadv_orig_node_put(orig_dst_node); |
be7af5cf | 883 | if (curr_gw) |
1409a834 | 884 | batadv_gw_node_free_ref(curr_gw); |
414254e3 ML |
885 | if (gw_node) |
886 | batadv_gw_node_free_ref(gw_node); | |
43676ab5 | 887 | if (neigh_old) |
25bb2509 | 888 | batadv_neigh_node_put(neigh_old); |
43676ab5 | 889 | if (neigh_curr) |
25bb2509 | 890 | batadv_neigh_node_put(neigh_curr); |
be7af5cf | 891 | return out_of_range; |
c6c8fea2 | 892 | } |