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9f6446c7 | 1 | /* Copyright (C) 2009-2015 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> | |
30 | #include <linux/jiffies.h> | |
31 | #include <linux/kernel.h> | |
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 | |
56303d34 | 63 | static void batadv_gw_node_free_ref(struct batadv_gw_node *gw_node) |
c6c8fea2 | 64 | { |
377fe0f9 AQ |
65 | if (atomic_dec_and_test(&gw_node->refcount)) { |
66 | batadv_orig_node_free_ref(gw_node->orig_node); | |
eb340b2f | 67 | kfree_rcu(gw_node, rcu); |
377fe0f9 | 68 | } |
c6c8fea2 SE |
69 | } |
70 | ||
56303d34 SE |
71 | static struct batadv_gw_node * |
72 | batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv) | |
c6c8fea2 | 73 | { |
56303d34 | 74 | struct batadv_gw_node *gw_node; |
c6c8fea2 | 75 | |
5d02b3cd | 76 | rcu_read_lock(); |
807736f6 | 77 | gw_node = rcu_dereference(bat_priv->gw.curr_gw); |
c4aac1ab | 78 | if (!gw_node) |
7b36e8ee | 79 | goto out; |
c6c8fea2 | 80 | |
c4aac1ab ML |
81 | if (!atomic_inc_not_zero(&gw_node->refcount)) |
82 | gw_node = NULL; | |
43c70ad5 | 83 | |
5d02b3cd LL |
84 | out: |
85 | rcu_read_unlock(); | |
c4aac1ab | 86 | return gw_node; |
c6c8fea2 SE |
87 | } |
88 | ||
56303d34 SE |
89 | struct batadv_orig_node * |
90 | batadv_gw_get_selected_orig(struct batadv_priv *bat_priv) | |
c6c8fea2 | 91 | { |
56303d34 SE |
92 | struct batadv_gw_node *gw_node; |
93 | struct batadv_orig_node *orig_node = NULL; | |
c6c8fea2 | 94 | |
1409a834 | 95 | gw_node = batadv_gw_get_selected_gw_node(bat_priv); |
c4aac1ab ML |
96 | if (!gw_node) |
97 | goto out; | |
98 | ||
99 | rcu_read_lock(); | |
100 | orig_node = gw_node->orig_node; | |
101 | if (!orig_node) | |
102 | goto unlock; | |
103 | ||
104 | if (!atomic_inc_not_zero(&orig_node->refcount)) | |
105 | orig_node = NULL; | |
c6c8fea2 | 106 | |
c4aac1ab ML |
107 | unlock: |
108 | rcu_read_unlock(); | |
109 | out: | |
c6c8fea2 | 110 | if (gw_node) |
1409a834 | 111 | batadv_gw_node_free_ref(gw_node); |
c4aac1ab | 112 | return orig_node; |
c6c8fea2 SE |
113 | } |
114 | ||
56303d34 SE |
115 | static void batadv_gw_select(struct batadv_priv *bat_priv, |
116 | struct batadv_gw_node *new_gw_node) | |
c6c8fea2 | 117 | { |
56303d34 | 118 | struct batadv_gw_node *curr_gw_node; |
c6c8fea2 | 119 | |
807736f6 | 120 | spin_lock_bh(&bat_priv->gw.list_lock); |
c4aac1ab | 121 | |
25b6d3c1 ML |
122 | if (new_gw_node && !atomic_inc_not_zero(&new_gw_node->refcount)) |
123 | new_gw_node = NULL; | |
c6c8fea2 | 124 | |
807736f6 SE |
125 | curr_gw_node = rcu_dereference_protected(bat_priv->gw.curr_gw, 1); |
126 | rcu_assign_pointer(bat_priv->gw.curr_gw, new_gw_node); | |
25b6d3c1 ML |
127 | |
128 | if (curr_gw_node) | |
1409a834 | 129 | batadv_gw_node_free_ref(curr_gw_node); |
c4aac1ab | 130 | |
807736f6 | 131 | spin_unlock_bh(&bat_priv->gw.list_lock); |
c4aac1ab ML |
132 | } |
133 | ||
4e820e72 AQ |
134 | /** |
135 | * batadv_gw_reselect - force a gateway reselection | |
136 | * @bat_priv: the bat priv with all the soft interface information | |
137 | * | |
138 | * Set a flag to remind the GW component to perform a new gateway reselection. | |
139 | * However this function does not ensure that the current gateway is going to be | |
140 | * deselected. The reselection mechanism may elect the same gateway once again. | |
141 | * | |
142 | * This means that invoking batadv_gw_reselect() does not guarantee a gateway | |
143 | * change and therefore a uevent is not necessarily expected. | |
144 | */ | |
145 | void batadv_gw_reselect(struct batadv_priv *bat_priv) | |
c4aac1ab | 146 | { |
807736f6 | 147 | atomic_set(&bat_priv->gw.reselect, 1); |
c6c8fea2 SE |
148 | } |
149 | ||
56303d34 SE |
150 | static struct batadv_gw_node * |
151 | batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
c6c8fea2 | 152 | { |
56303d34 | 153 | struct batadv_neigh_node *router; |
89652331 | 154 | struct batadv_neigh_ifinfo *router_ifinfo; |
56303d34 | 155 | struct batadv_gw_node *gw_node, *curr_gw = NULL; |
c6c8fea2 | 156 | uint32_t max_gw_factor = 0, tmp_gw_factor = 0; |
c67893d1 | 157 | uint32_t gw_divisor; |
2265c141 | 158 | uint8_t max_tq = 0; |
c67893d1 | 159 | uint8_t tq_avg; |
56303d34 | 160 | struct batadv_orig_node *orig_node; |
c6c8fea2 | 161 | |
c67893d1 SE |
162 | gw_divisor = BATADV_TQ_LOCAL_WINDOW_SIZE * BATADV_TQ_LOCAL_WINDOW_SIZE; |
163 | gw_divisor *= 64; | |
164 | ||
c4aac1ab | 165 | rcu_read_lock(); |
b67bfe0d | 166 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { |
e1a5382f | 167 | if (gw_node->deleted) |
c6c8fea2 SE |
168 | continue; |
169 | ||
84d5e5e0 | 170 | orig_node = gw_node->orig_node; |
7351a482 | 171 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); |
e1a5382f | 172 | if (!router) |
c6c8fea2 SE |
173 | continue; |
174 | ||
89652331 SW |
175 | router_ifinfo = batadv_neigh_ifinfo_get(router, |
176 | BATADV_IF_DEFAULT); | |
177 | if (!router_ifinfo) | |
178 | goto next; | |
179 | ||
2265c141 AQ |
180 | if (!atomic_inc_not_zero(&gw_node->refcount)) |
181 | goto next; | |
182 | ||
89652331 | 183 | tq_avg = router_ifinfo->bat_iv.tq_avg; |
c67893d1 | 184 | |
c6c8fea2 SE |
185 | switch (atomic_read(&bat_priv->gw_sel_class)) { |
186 | case 1: /* fast connection */ | |
414254e3 ML |
187 | tmp_gw_factor = tq_avg * tq_avg; |
188 | tmp_gw_factor *= gw_node->bandwidth_down; | |
189 | tmp_gw_factor *= 100 * 100; | |
c67893d1 | 190 | tmp_gw_factor /= gw_divisor; |
c6c8fea2 SE |
191 | |
192 | if ((tmp_gw_factor > max_gw_factor) || | |
193 | ((tmp_gw_factor == max_gw_factor) && | |
c67893d1 | 194 | (tq_avg > max_tq))) { |
2265c141 | 195 | if (curr_gw) |
1409a834 | 196 | batadv_gw_node_free_ref(curr_gw); |
2265c141 AQ |
197 | curr_gw = gw_node; |
198 | atomic_inc(&curr_gw->refcount); | |
199 | } | |
c6c8fea2 SE |
200 | break; |
201 | ||
9cfc7bd6 | 202 | default: /* 2: stable connection (use best statistic) |
c6c8fea2 SE |
203 | * 3: fast-switch (use best statistic but change as |
204 | * soon as a better gateway appears) | |
205 | * XX: late-switch (use best statistic but change as | |
206 | * soon as a better gateway appears which has | |
207 | * $routing_class more tq points) | |
9cfc7bd6 | 208 | */ |
c67893d1 | 209 | if (tq_avg > max_tq) { |
2265c141 | 210 | if (curr_gw) |
1409a834 | 211 | batadv_gw_node_free_ref(curr_gw); |
2265c141 AQ |
212 | curr_gw = gw_node; |
213 | atomic_inc(&curr_gw->refcount); | |
214 | } | |
c6c8fea2 SE |
215 | break; |
216 | } | |
217 | ||
c67893d1 SE |
218 | if (tq_avg > max_tq) |
219 | max_tq = tq_avg; | |
c6c8fea2 SE |
220 | |
221 | if (tmp_gw_factor > max_gw_factor) | |
222 | max_gw_factor = tmp_gw_factor; | |
e1a5382f | 223 | |
1409a834 | 224 | batadv_gw_node_free_ref(gw_node); |
2265c141 AQ |
225 | |
226 | next: | |
7d211efc | 227 | batadv_neigh_node_free_ref(router); |
89652331 SW |
228 | if (router_ifinfo) |
229 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
c6c8fea2 | 230 | } |
2265c141 | 231 | rcu_read_unlock(); |
c6c8fea2 | 232 | |
2265c141 AQ |
233 | return curr_gw; |
234 | } | |
c6c8fea2 | 235 | |
c6eaa3f0 AQ |
236 | /** |
237 | * batadv_gw_check_client_stop - check if client mode has been switched off | |
238 | * @bat_priv: the bat priv with all the soft interface information | |
239 | * | |
240 | * This function assumes the caller has checked that the gw state *is actually | |
241 | * changing*. This function is not supposed to be called when there is no state | |
242 | * change. | |
243 | */ | |
244 | void batadv_gw_check_client_stop(struct batadv_priv *bat_priv) | |
245 | { | |
246 | struct batadv_gw_node *curr_gw; | |
247 | ||
248 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) | |
249 | return; | |
250 | ||
251 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
252 | if (!curr_gw) | |
253 | return; | |
254 | ||
f3163181 AQ |
255 | /* deselect the current gateway so that next time that client mode is |
256 | * enabled a proper GW_ADD event can be sent | |
257 | */ | |
258 | batadv_gw_select(bat_priv, NULL); | |
259 | ||
c6eaa3f0 AQ |
260 | /* if batman-adv is switching the gw client mode off and a gateway was |
261 | * already selected, send a DEL uevent | |
262 | */ | |
263 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, NULL); | |
264 | ||
265 | batadv_gw_node_free_ref(curr_gw); | |
266 | } | |
267 | ||
56303d34 | 268 | void batadv_gw_election(struct batadv_priv *bat_priv) |
2265c141 | 269 | { |
56303d34 SE |
270 | struct batadv_gw_node *curr_gw = NULL, *next_gw = NULL; |
271 | struct batadv_neigh_node *router = NULL; | |
89652331 | 272 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
19595e05 | 273 | char gw_addr[18] = { '\0' }; |
2265c141 | 274 | |
cd646ab1 | 275 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) |
2265c141 AQ |
276 | goto out; |
277 | ||
1409a834 | 278 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
2265c141 | 279 | |
807736f6 | 280 | if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw) |
caa0bf64 ML |
281 | goto out; |
282 | ||
1409a834 | 283 | next_gw = batadv_gw_get_best_gw_node(bat_priv); |
2265c141 AQ |
284 | |
285 | if (curr_gw == next_gw) | |
286 | goto out; | |
287 | ||
288 | if (next_gw) { | |
19595e05 AQ |
289 | sprintf(gw_addr, "%pM", next_gw->orig_node->orig); |
290 | ||
7351a482 SW |
291 | router = batadv_orig_router_get(next_gw->orig_node, |
292 | BATADV_IF_DEFAULT); | |
2265c141 | 293 | if (!router) { |
4e820e72 | 294 | batadv_gw_reselect(bat_priv); |
2265c141 AQ |
295 | goto out; |
296 | } | |
89652331 SW |
297 | |
298 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
299 | BATADV_IF_DEFAULT); | |
300 | if (!router_ifinfo) { | |
301 | batadv_gw_reselect(bat_priv); | |
302 | goto out; | |
303 | } | |
c6c8fea2 SE |
304 | } |
305 | ||
2265c141 | 306 | if ((curr_gw) && (!next_gw)) { |
39c75a51 | 307 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 308 | "Removing selected gateway - no gateway in range\n"); |
39c75a51 SE |
309 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, |
310 | NULL); | |
2265c141 | 311 | } else if ((!curr_gw) && (next_gw)) { |
39c75a51 | 312 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 | 313 | "Adding route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
1eda58bf | 314 | next_gw->orig_node->orig, |
414254e3 ML |
315 | next_gw->bandwidth_down / 10, |
316 | next_gw->bandwidth_down % 10, | |
317 | next_gw->bandwidth_up / 10, | |
89652331 SW |
318 | next_gw->bandwidth_up % 10, |
319 | router_ifinfo->bat_iv.tq_avg); | |
39c75a51 SE |
320 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, |
321 | gw_addr); | |
2265c141 | 322 | } else { |
39c75a51 | 323 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 | 324 | "Changing route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
1eda58bf | 325 | next_gw->orig_node->orig, |
414254e3 ML |
326 | next_gw->bandwidth_down / 10, |
327 | next_gw->bandwidth_down % 10, | |
328 | next_gw->bandwidth_up / 10, | |
89652331 SW |
329 | next_gw->bandwidth_up % 10, |
330 | router_ifinfo->bat_iv.tq_avg); | |
39c75a51 SE |
331 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE, |
332 | gw_addr); | |
2265c141 AQ |
333 | } |
334 | ||
1409a834 | 335 | batadv_gw_select(bat_priv, next_gw); |
2265c141 | 336 | |
c4aac1ab ML |
337 | out: |
338 | if (curr_gw) | |
1409a834 | 339 | batadv_gw_node_free_ref(curr_gw); |
2265c141 | 340 | if (next_gw) |
1409a834 | 341 | batadv_gw_node_free_ref(next_gw); |
2265c141 | 342 | if (router) |
7d211efc | 343 | batadv_neigh_node_free_ref(router); |
89652331 SW |
344 | if (router_ifinfo) |
345 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
c6c8fea2 SE |
346 | } |
347 | ||
56303d34 SE |
348 | void batadv_gw_check_election(struct batadv_priv *bat_priv, |
349 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 350 | { |
89652331 SW |
351 | struct batadv_neigh_ifinfo *router_orig_tq = NULL; |
352 | struct batadv_neigh_ifinfo *router_gw_tq = NULL; | |
56303d34 SE |
353 | struct batadv_orig_node *curr_gw_orig; |
354 | struct batadv_neigh_node *router_gw = NULL, *router_orig = NULL; | |
c6c8fea2 SE |
355 | uint8_t gw_tq_avg, orig_tq_avg; |
356 | ||
7cf06bc6 | 357 | curr_gw_orig = batadv_gw_get_selected_orig(bat_priv); |
57f0c07c | 358 | if (!curr_gw_orig) |
4e820e72 | 359 | goto reselect; |
c6c8fea2 | 360 | |
7351a482 | 361 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); |
e1a5382f | 362 | if (!router_gw) |
4e820e72 | 363 | goto reselect; |
c6c8fea2 | 364 | |
89652331 SW |
365 | router_gw_tq = batadv_neigh_ifinfo_get(router_gw, |
366 | BATADV_IF_DEFAULT); | |
367 | if (!router_gw_tq) | |
368 | goto reselect; | |
369 | ||
c6c8fea2 | 370 | /* this node already is the gateway */ |
57f0c07c | 371 | if (curr_gw_orig == orig_node) |
e1a5382f | 372 | goto out; |
c6c8fea2 | 373 | |
7351a482 | 374 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); |
e1a5382f LL |
375 | if (!router_orig) |
376 | goto out; | |
5d02b3cd | 377 | |
89652331 SW |
378 | router_orig_tq = batadv_neigh_ifinfo_get(router_orig, |
379 | BATADV_IF_DEFAULT); | |
380 | if (!router_orig_tq) | |
381 | goto out; | |
382 | ||
383 | gw_tq_avg = router_gw_tq->bat_iv.tq_avg; | |
384 | orig_tq_avg = router_orig_tq->bat_iv.tq_avg; | |
c6c8fea2 SE |
385 | |
386 | /* the TQ value has to be better */ | |
387 | if (orig_tq_avg < gw_tq_avg) | |
5d02b3cd | 388 | goto out; |
c6c8fea2 | 389 | |
9cfc7bd6 | 390 | /* if the routing class is greater than 3 the value tells us how much |
c6c8fea2 | 391 | * greater the TQ value of the new gateway must be |
9cfc7bd6 | 392 | */ |
c6c8fea2 SE |
393 | if ((atomic_read(&bat_priv->gw_sel_class) > 3) && |
394 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw_sel_class))) | |
5d02b3cd | 395 | goto out; |
c6c8fea2 | 396 | |
39c75a51 | 397 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
398 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", |
399 | gw_tq_avg, orig_tq_avg); | |
c6c8fea2 | 400 | |
4e820e72 AQ |
401 | reselect: |
402 | batadv_gw_reselect(bat_priv); | |
5d02b3cd | 403 | out: |
57f0c07c | 404 | if (curr_gw_orig) |
7d211efc | 405 | batadv_orig_node_free_ref(curr_gw_orig); |
e1a5382f | 406 | if (router_gw) |
7d211efc | 407 | batadv_neigh_node_free_ref(router_gw); |
e1a5382f | 408 | if (router_orig) |
7d211efc | 409 | batadv_neigh_node_free_ref(router_orig); |
89652331 SW |
410 | if (router_gw_tq) |
411 | batadv_neigh_ifinfo_free_ref(router_gw_tq); | |
412 | if (router_orig_tq) | |
413 | batadv_neigh_ifinfo_free_ref(router_orig_tq); | |
c6c8fea2 SE |
414 | } |
415 | ||
414254e3 ML |
416 | /** |
417 | * batadv_gw_node_add - add gateway node to list of available gateways | |
418 | * @bat_priv: the bat priv with all the soft interface information | |
419 | * @orig_node: originator announcing gateway capabilities | |
420 | * @gateway: announced bandwidth information | |
421 | */ | |
56303d34 SE |
422 | static void batadv_gw_node_add(struct batadv_priv *bat_priv, |
423 | struct batadv_orig_node *orig_node, | |
414254e3 | 424 | struct batadv_tvlv_gateway_data *gateway) |
c6c8fea2 | 425 | { |
56303d34 | 426 | struct batadv_gw_node *gw_node; |
414254e3 ML |
427 | |
428 | if (gateway->bandwidth_down == 0) | |
429 | return; | |
c6c8fea2 | 430 | |
377fe0f9 AQ |
431 | if (!atomic_inc_not_zero(&orig_node->refcount)) |
432 | return; | |
433 | ||
704509b8 | 434 | gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC); |
377fe0f9 AQ |
435 | if (!gw_node) { |
436 | batadv_orig_node_free_ref(orig_node); | |
c6c8fea2 | 437 | return; |
377fe0f9 | 438 | } |
c6c8fea2 | 439 | |
c6c8fea2 SE |
440 | INIT_HLIST_NODE(&gw_node->list); |
441 | gw_node->orig_node = orig_node; | |
27a4d5ef SW |
442 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); |
443 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); | |
25b6d3c1 | 444 | atomic_set(&gw_node->refcount, 1); |
c6c8fea2 | 445 | |
807736f6 SE |
446 | spin_lock_bh(&bat_priv->gw.list_lock); |
447 | hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list); | |
448 | spin_unlock_bh(&bat_priv->gw.list_lock); | |
c6c8fea2 | 449 | |
39c75a51 | 450 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
414254e3 ML |
451 | "Found new gateway %pM -> gw bandwidth: %u.%u/%u.%u MBit\n", |
452 | orig_node->orig, | |
453 | ntohl(gateway->bandwidth_down) / 10, | |
454 | ntohl(gateway->bandwidth_down) % 10, | |
455 | ntohl(gateway->bandwidth_up) / 10, | |
456 | ntohl(gateway->bandwidth_up) % 10); | |
c6c8fea2 SE |
457 | } |
458 | ||
414254e3 ML |
459 | /** |
460 | * batadv_gw_node_get - retrieve gateway node from list of available gateways | |
461 | * @bat_priv: the bat priv with all the soft interface information | |
462 | * @orig_node: originator announcing gateway capabilities | |
463 | * | |
464 | * Returns gateway node if found or NULL otherwise. | |
465 | */ | |
466 | static struct batadv_gw_node * | |
467 | batadv_gw_node_get(struct batadv_priv *bat_priv, | |
468 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 469 | { |
414254e3 | 470 | struct batadv_gw_node *gw_node_tmp, *gw_node = NULL; |
c6c8fea2 SE |
471 | |
472 | rcu_read_lock(); | |
414254e3 ML |
473 | hlist_for_each_entry_rcu(gw_node_tmp, &bat_priv->gw.list, list) { |
474 | if (gw_node_tmp->orig_node != orig_node) | |
c6c8fea2 SE |
475 | continue; |
476 | ||
414254e3 ML |
477 | if (gw_node_tmp->deleted) |
478 | continue; | |
c6c8fea2 | 479 | |
414254e3 ML |
480 | if (!atomic_inc_not_zero(&gw_node_tmp->refcount)) |
481 | continue; | |
c6c8fea2 | 482 | |
414254e3 ML |
483 | gw_node = gw_node_tmp; |
484 | break; | |
485 | } | |
486 | rcu_read_unlock(); | |
c6c8fea2 | 487 | |
414254e3 ML |
488 | return gw_node; |
489 | } | |
c6c8fea2 | 490 | |
414254e3 ML |
491 | /** |
492 | * batadv_gw_node_update - update list of available gateways with changed | |
493 | * bandwidth information | |
494 | * @bat_priv: the bat priv with all the soft interface information | |
495 | * @orig_node: originator announcing gateway capabilities | |
496 | * @gateway: announced bandwidth information | |
497 | */ | |
498 | void batadv_gw_node_update(struct batadv_priv *bat_priv, | |
499 | struct batadv_orig_node *orig_node, | |
500 | struct batadv_tvlv_gateway_data *gateway) | |
501 | { | |
502 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
503 | ||
504 | gw_node = batadv_gw_node_get(bat_priv, orig_node); | |
505 | if (!gw_node) { | |
506 | batadv_gw_node_add(bat_priv, orig_node, gateway); | |
507 | goto out; | |
c6c8fea2 | 508 | } |
c6c8fea2 | 509 | |
414254e3 ML |
510 | if ((gw_node->bandwidth_down == ntohl(gateway->bandwidth_down)) && |
511 | (gw_node->bandwidth_up == ntohl(gateway->bandwidth_up))) | |
512 | goto out; | |
c6c8fea2 | 513 | |
414254e3 ML |
514 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
515 | "Gateway bandwidth of originator %pM changed from %u.%u/%u.%u MBit to %u.%u/%u.%u MBit\n", | |
516 | orig_node->orig, | |
517 | gw_node->bandwidth_down / 10, | |
518 | gw_node->bandwidth_down % 10, | |
519 | gw_node->bandwidth_up / 10, | |
520 | gw_node->bandwidth_up % 10, | |
521 | ntohl(gateway->bandwidth_down) / 10, | |
522 | ntohl(gateway->bandwidth_down) % 10, | |
523 | ntohl(gateway->bandwidth_up) / 10, | |
524 | ntohl(gateway->bandwidth_up) % 10); | |
525 | ||
526 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); | |
527 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); | |
528 | ||
529 | gw_node->deleted = 0; | |
530 | if (ntohl(gateway->bandwidth_down) == 0) { | |
531 | gw_node->deleted = jiffies; | |
532 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
533 | "Gateway %pM removed from gateway list\n", | |
534 | orig_node->orig); | |
c4aac1ab | 535 | |
414254e3 ML |
536 | /* Note: We don't need a NULL check here, since curr_gw never |
537 | * gets dereferenced. | |
538 | */ | |
539 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
540 | if (gw_node == curr_gw) | |
4e820e72 | 541 | batadv_gw_reselect(bat_priv); |
414254e3 | 542 | } |
71e4aa9c | 543 | |
414254e3 | 544 | out: |
c4aac1ab | 545 | if (curr_gw) |
1409a834 | 546 | batadv_gw_node_free_ref(curr_gw); |
414254e3 ML |
547 | if (gw_node) |
548 | batadv_gw_node_free_ref(gw_node); | |
c6c8fea2 SE |
549 | } |
550 | ||
56303d34 SE |
551 | void batadv_gw_node_delete(struct batadv_priv *bat_priv, |
552 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 553 | { |
414254e3 ML |
554 | struct batadv_tvlv_gateway_data gateway; |
555 | ||
556 | gateway.bandwidth_down = 0; | |
557 | gateway.bandwidth_up = 0; | |
558 | ||
559 | batadv_gw_node_update(bat_priv, orig_node, &gateway); | |
c6c8fea2 SE |
560 | } |
561 | ||
56303d34 | 562 | void batadv_gw_node_purge(struct batadv_priv *bat_priv) |
c6c8fea2 | 563 | { |
56303d34 | 564 | struct batadv_gw_node *gw_node, *curr_gw; |
b67bfe0d | 565 | struct hlist_node *node_tmp; |
42d0b044 | 566 | unsigned long timeout = msecs_to_jiffies(2 * BATADV_PURGE_TIMEOUT); |
4e820e72 | 567 | int do_reselect = 0; |
c4aac1ab | 568 | |
1409a834 | 569 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
c6c8fea2 | 570 | |
807736f6 | 571 | spin_lock_bh(&bat_priv->gw.list_lock); |
c6c8fea2 | 572 | |
b67bfe0d | 573 | hlist_for_each_entry_safe(gw_node, node_tmp, |
807736f6 | 574 | &bat_priv->gw.list, list) { |
c6c8fea2 SE |
575 | if (((!gw_node->deleted) || |
576 | (time_before(jiffies, gw_node->deleted + timeout))) && | |
39c75a51 | 577 | atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
578 | continue; |
579 | ||
c4aac1ab | 580 | if (curr_gw == gw_node) |
4e820e72 | 581 | do_reselect = 1; |
c6c8fea2 SE |
582 | |
583 | hlist_del_rcu(&gw_node->list); | |
1409a834 | 584 | batadv_gw_node_free_ref(gw_node); |
c6c8fea2 SE |
585 | } |
586 | ||
807736f6 | 587 | spin_unlock_bh(&bat_priv->gw.list_lock); |
c4aac1ab | 588 | |
4e820e72 AQ |
589 | /* gw_reselect() needs to acquire the gw_list_lock */ |
590 | if (do_reselect) | |
591 | batadv_gw_reselect(bat_priv); | |
c4aac1ab ML |
592 | |
593 | if (curr_gw) | |
1409a834 | 594 | batadv_gw_node_free_ref(curr_gw); |
c6c8fea2 SE |
595 | } |
596 | ||
9cfc7bd6 | 597 | /* fails if orig_node has no router */ |
56303d34 SE |
598 | static int batadv_write_buffer_text(struct batadv_priv *bat_priv, |
599 | struct seq_file *seq, | |
600 | const struct batadv_gw_node *gw_node) | |
c6c8fea2 | 601 | { |
56303d34 SE |
602 | struct batadv_gw_node *curr_gw; |
603 | struct batadv_neigh_node *router; | |
89652331 | 604 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
414254e3 | 605 | int ret = -1; |
c6c8fea2 | 606 | |
7351a482 | 607 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); |
e1a5382f LL |
608 | if (!router) |
609 | goto out; | |
5d02b3cd | 610 | |
89652331 SW |
611 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); |
612 | if (!router_ifinfo) | |
613 | goto out; | |
614 | ||
1409a834 | 615 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
5d02b3cd | 616 | |
6d91147d JP |
617 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", |
618 | (curr_gw == gw_node ? "=>" : " "), | |
619 | gw_node->orig_node->orig, | |
620 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
621 | router->if_incoming->net_dev->name, | |
622 | gw_node->bandwidth_down / 10, | |
623 | gw_node->bandwidth_down % 10, | |
624 | gw_node->bandwidth_up / 10, | |
625 | gw_node->bandwidth_up % 10); | |
92b83917 | 626 | ret = seq_has_overflowed(seq) ? -1 : 0; |
5d02b3cd | 627 | |
c4aac1ab | 628 | if (curr_gw) |
1409a834 | 629 | batadv_gw_node_free_ref(curr_gw); |
e1a5382f | 630 | out: |
89652331 SW |
631 | if (router_ifinfo) |
632 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
633 | if (router) | |
634 | batadv_neigh_node_free_ref(router); | |
5d02b3cd | 635 | return ret; |
c6c8fea2 SE |
636 | } |
637 | ||
7cf06bc6 | 638 | int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
639 | { |
640 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 SE |
641 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
642 | struct batadv_hard_iface *primary_if; | |
643 | struct batadv_gw_node *gw_node; | |
30da63a6 | 644 | int gw_count = 0; |
c6c8fea2 | 645 | |
30da63a6 ML |
646 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
647 | if (!primary_if) | |
32ae9b22 | 648 | goto out; |
c6c8fea2 | 649 | |
86ceb360 | 650 | seq_printf(seq, |
414254e3 | 651 | " %-12s (%s/%i) %17s [%10s]: advertised uplink bandwidth ... [B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n", |
42d0b044 SE |
652 | "Gateway", "#", BATADV_TQ_MAX_VALUE, "Nexthop", "outgoingIF", |
653 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
32ae9b22 | 654 | primary_if->net_dev->dev_addr, net_dev->name); |
c6c8fea2 SE |
655 | |
656 | rcu_read_lock(); | |
b67bfe0d | 657 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { |
c6c8fea2 SE |
658 | if (gw_node->deleted) |
659 | continue; | |
660 | ||
e1a5382f | 661 | /* fails if orig_node has no router */ |
1409a834 | 662 | if (batadv_write_buffer_text(bat_priv, seq, gw_node) < 0) |
c6c8fea2 SE |
663 | continue; |
664 | ||
c6c8fea2 SE |
665 | gw_count++; |
666 | } | |
667 | rcu_read_unlock(); | |
668 | ||
669 | if (gw_count == 0) | |
0c814653 | 670 | seq_puts(seq, "No gateways in range ...\n"); |
c6c8fea2 | 671 | |
32ae9b22 ML |
672 | out: |
673 | if (primary_if) | |
e5d89254 | 674 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 675 | return 0; |
c6c8fea2 SE |
676 | } |
677 | ||
6c413b1c AQ |
678 | /** |
679 | * batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message | |
680 | * @skb: the packet to check | |
681 | * @header_len: a pointer to the batman-adv header size | |
682 | * @chaddr: buffer where the client address will be stored. Valid | |
683 | * only if the function returns BATADV_DHCP_TO_CLIENT | |
684 | * | |
685 | * Returns: | |
686 | * - BATADV_DHCP_NO if the packet is not a dhcp message or if there was an error | |
687 | * while parsing it | |
688 | * - BATADV_DHCP_TO_SERVER if this is a message going to the DHCP server | |
689 | * - BATADV_DHCP_TO_CLIENT if this is a message going to a DHCP client | |
690 | * | |
691 | * This function may re-allocate the data buffer of the skb passed as argument. | |
692 | */ | |
693 | enum batadv_dhcp_recipient | |
694 | batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, | |
695 | uint8_t *chaddr) | |
c6c8fea2 | 696 | { |
6c413b1c | 697 | enum batadv_dhcp_recipient ret = BATADV_DHCP_NO; |
c6c8fea2 SE |
698 | struct ethhdr *ethhdr; |
699 | struct iphdr *iphdr; | |
700 | struct ipv6hdr *ipv6hdr; | |
701 | struct udphdr *udphdr; | |
f7f8ed56 | 702 | struct vlan_ethhdr *vhdr; |
6c413b1c | 703 | int chaddr_offset; |
f7f8ed56 | 704 | __be16 proto; |
6c413b1c | 705 | uint8_t *p; |
c6c8fea2 SE |
706 | |
707 | /* check for ethernet header */ | |
be7af5cf | 708 | if (!pskb_may_pull(skb, *header_len + ETH_HLEN)) |
6c413b1c AQ |
709 | return BATADV_DHCP_NO; |
710 | ||
927c2ed7 | 711 | ethhdr = eth_hdr(skb); |
f7f8ed56 | 712 | proto = ethhdr->h_proto; |
be7af5cf | 713 | *header_len += ETH_HLEN; |
c6c8fea2 SE |
714 | |
715 | /* check for initial vlan header */ | |
f7f8ed56 | 716 | if (proto == htons(ETH_P_8021Q)) { |
be7af5cf | 717 | if (!pskb_may_pull(skb, *header_len + VLAN_HLEN)) |
6c413b1c | 718 | return BATADV_DHCP_NO; |
f7f8ed56 | 719 | |
927c2ed7 | 720 | vhdr = vlan_eth_hdr(skb); |
f7f8ed56 | 721 | proto = vhdr->h_vlan_encapsulated_proto; |
be7af5cf | 722 | *header_len += VLAN_HLEN; |
c6c8fea2 SE |
723 | } |
724 | ||
725 | /* check for ip header */ | |
f7f8ed56 AQ |
726 | switch (proto) { |
727 | case htons(ETH_P_IP): | |
be7af5cf | 728 | if (!pskb_may_pull(skb, *header_len + sizeof(*iphdr))) |
6c413b1c AQ |
729 | return BATADV_DHCP_NO; |
730 | ||
be7af5cf ML |
731 | iphdr = (struct iphdr *)(skb->data + *header_len); |
732 | *header_len += iphdr->ihl * 4; | |
c6c8fea2 SE |
733 | |
734 | /* check for udp header */ | |
735 | if (iphdr->protocol != IPPROTO_UDP) | |
6c413b1c | 736 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
737 | |
738 | break; | |
f7f8ed56 | 739 | case htons(ETH_P_IPV6): |
be7af5cf | 740 | if (!pskb_may_pull(skb, *header_len + sizeof(*ipv6hdr))) |
6c413b1c AQ |
741 | return BATADV_DHCP_NO; |
742 | ||
be7af5cf ML |
743 | ipv6hdr = (struct ipv6hdr *)(skb->data + *header_len); |
744 | *header_len += sizeof(*ipv6hdr); | |
c6c8fea2 SE |
745 | |
746 | /* check for udp header */ | |
747 | if (ipv6hdr->nexthdr != IPPROTO_UDP) | |
6c413b1c | 748 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
749 | |
750 | break; | |
751 | default: | |
6c413b1c | 752 | return BATADV_DHCP_NO; |
c6c8fea2 SE |
753 | } |
754 | ||
be7af5cf | 755 | if (!pskb_may_pull(skb, *header_len + sizeof(*udphdr))) |
6c413b1c | 756 | return BATADV_DHCP_NO; |
9d2c9488 | 757 | |
be7af5cf ML |
758 | udphdr = (struct udphdr *)(skb->data + *header_len); |
759 | *header_len += sizeof(*udphdr); | |
c6c8fea2 SE |
760 | |
761 | /* check for bootp port */ | |
6c413b1c AQ |
762 | switch (proto) { |
763 | case htons(ETH_P_IP): | |
764 | if (udphdr->dest == htons(67)) | |
765 | ret = BATADV_DHCP_TO_SERVER; | |
766 | else if (udphdr->source == htons(67)) | |
767 | ret = BATADV_DHCP_TO_CLIENT; | |
768 | break; | |
769 | case htons(ETH_P_IPV6): | |
770 | if (udphdr->dest == htons(547)) | |
771 | ret = BATADV_DHCP_TO_SERVER; | |
772 | else if (udphdr->source == htons(547)) | |
773 | ret = BATADV_DHCP_TO_CLIENT; | |
774 | break; | |
775 | } | |
c6c8fea2 | 776 | |
6c413b1c AQ |
777 | chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET; |
778 | /* store the client address if the message is going to a client */ | |
779 | if (ret == BATADV_DHCP_TO_CLIENT && | |
780 | pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) { | |
781 | /* check if the DHCP packet carries an Ethernet DHCP */ | |
782 | p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET; | |
783 | if (*p != BATADV_DHCP_HTYPE_ETHERNET) | |
784 | return BATADV_DHCP_NO; | |
785 | ||
786 | /* check if the DHCP packet carries a valid Ethernet address */ | |
787 | p = skb->data + *header_len + BATADV_DHCP_HLEN_OFFSET; | |
788 | if (*p != ETH_ALEN) | |
789 | return BATADV_DHCP_NO; | |
790 | ||
8fdd0153 | 791 | ether_addr_copy(chaddr, skb->data + chaddr_offset); |
6c413b1c | 792 | } |
c6c8fea2 | 793 | |
6c413b1c | 794 | return ret; |
be7af5cf | 795 | } |
aa143d28 | 796 | |
bbb877ed AQ |
797 | /** |
798 | * batadv_gw_out_of_range - check if the dhcp request destination is the best gw | |
799 | * @bat_priv: the bat priv with all the soft interface information | |
800 | * @skb: the outgoing packet | |
801 | * | |
802 | * Check if the skb is a DHCP request and if it is sent to the current best GW | |
803 | * server. Due to topology changes it may be the case that the GW server | |
804 | * previously selected is not the best one anymore. | |
805 | * | |
806 | * Returns true if the packet destination is unicast and it is not the best gw, | |
807 | * false otherwise. | |
808 | * | |
809 | * This call might reallocate skb data. | |
6c413b1c | 810 | * Must be invoked only when the DHCP packet is going TO a DHCP SERVER. |
bbb877ed | 811 | */ |
56303d34 | 812 | bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, |
9d2c9488 | 813 | struct sk_buff *skb) |
be7af5cf | 814 | { |
56303d34 SE |
815 | struct batadv_neigh_node *neigh_curr = NULL, *neigh_old = NULL; |
816 | struct batadv_orig_node *orig_dst_node = NULL; | |
414254e3 | 817 | struct batadv_gw_node *gw_node = NULL, *curr_gw = NULL; |
89652331 | 818 | struct batadv_neigh_ifinfo *curr_ifinfo, *old_ifinfo; |
6c413b1c AQ |
819 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
820 | bool out_of_range = false; | |
be7af5cf | 821 | uint8_t curr_tq_avg; |
bbb877ed AQ |
822 | unsigned short vid; |
823 | ||
824 | vid = batadv_get_vid(skb, 0); | |
be7af5cf | 825 | |
08c36d3e | 826 | orig_dst_node = batadv_transtable_search(bat_priv, ethhdr->h_source, |
bbb877ed | 827 | ethhdr->h_dest, vid); |
be7af5cf ML |
828 | if (!orig_dst_node) |
829 | goto out; | |
830 | ||
414254e3 | 831 | gw_node = batadv_gw_node_get(bat_priv, orig_dst_node); |
0d164491 | 832 | if (!gw_node) |
be7af5cf ML |
833 | goto out; |
834 | ||
be7af5cf | 835 | switch (atomic_read(&bat_priv->gw_mode)) { |
cd646ab1 | 836 | case BATADV_GW_MODE_SERVER: |
be7af5cf | 837 | /* If we are a GW then we are our best GW. We can artificially |
9cfc7bd6 SE |
838 | * set the tq towards ourself as the maximum value |
839 | */ | |
42d0b044 | 840 | curr_tq_avg = BATADV_TQ_MAX_VALUE; |
be7af5cf | 841 | break; |
cd646ab1 | 842 | case BATADV_GW_MODE_CLIENT: |
1409a834 | 843 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
be7af5cf ML |
844 | if (!curr_gw) |
845 | goto out; | |
846 | ||
847 | /* packet is going to our gateway */ | |
848 | if (curr_gw->orig_node == orig_dst_node) | |
849 | goto out; | |
850 | ||
851 | /* If the dhcp packet has been sent to a different gw, | |
852 | * we have to evaluate whether the old gw is still | |
9cfc7bd6 SE |
853 | * reliable enough |
854 | */ | |
30d3c511 SE |
855 | neigh_curr = batadv_find_router(bat_priv, curr_gw->orig_node, |
856 | NULL); | |
be7af5cf ML |
857 | if (!neigh_curr) |
858 | goto out; | |
859 | ||
89652331 SW |
860 | curr_ifinfo = batadv_neigh_ifinfo_get(neigh_curr, |
861 | BATADV_IF_DEFAULT); | |
862 | if (!curr_ifinfo) | |
863 | goto out; | |
864 | ||
865 | curr_tq_avg = curr_ifinfo->bat_iv.tq_avg; | |
866 | batadv_neigh_ifinfo_free_ref(curr_ifinfo); | |
867 | ||
be7af5cf | 868 | break; |
cd646ab1 | 869 | case BATADV_GW_MODE_OFF: |
be7af5cf ML |
870 | default: |
871 | goto out; | |
43676ab5 | 872 | } |
be7af5cf | 873 | |
30d3c511 | 874 | neigh_old = batadv_find_router(bat_priv, orig_dst_node, NULL); |
2ef04f47 | 875 | if (!neigh_old) |
be7af5cf ML |
876 | goto out; |
877 | ||
89652331 SW |
878 | old_ifinfo = batadv_neigh_ifinfo_get(neigh_old, BATADV_IF_DEFAULT); |
879 | if (!old_ifinfo) | |
880 | goto out; | |
881 | ||
882 | if ((curr_tq_avg - old_ifinfo->bat_iv.tq_avg) > BATADV_GW_THRESHOLD) | |
be7af5cf | 883 | out_of_range = true; |
89652331 | 884 | batadv_neigh_ifinfo_free_ref(old_ifinfo); |
be7af5cf ML |
885 | |
886 | out: | |
887 | if (orig_dst_node) | |
7d211efc | 888 | batadv_orig_node_free_ref(orig_dst_node); |
be7af5cf | 889 | if (curr_gw) |
1409a834 | 890 | batadv_gw_node_free_ref(curr_gw); |
414254e3 ML |
891 | if (gw_node) |
892 | batadv_gw_node_free_ref(gw_node); | |
43676ab5 | 893 | if (neigh_old) |
7d211efc | 894 | batadv_neigh_node_free_ref(neigh_old); |
43676ab5 | 895 | if (neigh_curr) |
7d211efc | 896 | batadv_neigh_node_free_ref(neigh_curr); |
be7af5cf | 897 | return out_of_range; |
c6c8fea2 | 898 | } |