Commit | Line | Data |
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9cfc7bd6 | 1 | /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
fc957275 ML |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
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 | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
fc957275 ML |
18 | */ |
19 | ||
20 | #include "main.h" | |
fc957275 ML |
21 | #include "translation-table.h" |
22 | #include "ring_buffer.h" | |
23 | #include "originator.h" | |
24 | #include "routing.h" | |
25 | #include "gateway_common.h" | |
26 | #include "gateway_client.h" | |
27 | #include "hard-interface.h" | |
28 | #include "send.h" | |
1c280471 | 29 | #include "bat_algo.h" |
fc957275 | 30 | |
56303d34 SE |
31 | static struct batadv_neigh_node * |
32 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
33 | const uint8_t *neigh_addr, | |
34 | struct batadv_orig_node *orig_node, | |
35 | struct batadv_orig_node *orig_neigh, __be32 seqno) | |
7ae8b285 | 36 | { |
56303d34 | 37 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 38 | |
e0f5211f AV |
39 | neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, |
40 | ntohl(seqno)); | |
7ae8b285 ML |
41 | if (!neigh_node) |
42 | goto out; | |
43 | ||
44 | INIT_LIST_HEAD(&neigh_node->bonding_list); | |
7ae8b285 ML |
45 | |
46 | neigh_node->orig_node = orig_neigh; | |
47 | neigh_node->if_incoming = hard_iface; | |
48 | ||
49 | spin_lock_bh(&orig_node->neigh_list_lock); | |
50 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
51 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
52 | ||
53 | out: | |
54 | return neigh_node; | |
55 | } | |
56 | ||
56303d34 | 57 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 58 | { |
96412690 | 59 | struct batadv_ogm_packet *batadv_ogm_packet; |
d7d32ec0 | 60 | uint32_t random_seqno; |
5346c35e | 61 | int res = -ENOMEM; |
d7d32ec0 ML |
62 | |
63 | /* randomize initial seqno to avoid collision */ | |
64 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
65 | atomic_set(&hard_iface->seqno, random_seqno); | |
d0b9fd89 | 66 | |
7e071c79 | 67 | hard_iface->packet_len = BATADV_OGM_HLEN; |
d0b9fd89 ML |
68 | hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC); |
69 | ||
77af7575 ML |
70 | if (!hard_iface->packet_buff) |
71 | goto out; | |
72 | ||
96412690 SE |
73 | batadv_ogm_packet = (struct batadv_ogm_packet *)hard_iface->packet_buff; |
74 | batadv_ogm_packet->header.packet_type = BATADV_IV_OGM; | |
75 | batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION; | |
76 | batadv_ogm_packet->header.ttl = 2; | |
77 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; | |
78 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; | |
79 | batadv_ogm_packet->tt_num_changes = 0; | |
80 | batadv_ogm_packet->ttvn = 0; | |
77af7575 ML |
81 | |
82 | res = 0; | |
83 | ||
84 | out: | |
85 | return res; | |
d0b9fd89 ML |
86 | } |
87 | ||
56303d34 | 88 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 ML |
89 | { |
90 | kfree(hard_iface->packet_buff); | |
91 | hard_iface->packet_buff = NULL; | |
92 | } | |
93 | ||
56303d34 | 94 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 95 | { |
96412690 | 96 | struct batadv_ogm_packet *batadv_ogm_packet; |
d0b9fd89 | 97 | |
96412690 SE |
98 | batadv_ogm_packet = (struct batadv_ogm_packet *)hard_iface->packet_buff; |
99 | memcpy(batadv_ogm_packet->orig, | |
c3229398 | 100 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
96412690 | 101 | memcpy(batadv_ogm_packet->prev_sender, |
c3229398 | 102 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
d0b9fd89 ML |
103 | } |
104 | ||
56303d34 SE |
105 | static void |
106 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 107 | { |
96412690 | 108 | struct batadv_ogm_packet *batadv_ogm_packet; |
d0b9fd89 | 109 | |
96412690 SE |
110 | batadv_ogm_packet = (struct batadv_ogm_packet *)hard_iface->packet_buff; |
111 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; | |
112 | batadv_ogm_packet->header.ttl = BATADV_TTL; | |
d0b9fd89 ML |
113 | } |
114 | ||
b9dacc52 | 115 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 116 | static unsigned long |
56303d34 | 117 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 118 | { |
42d0b044 SE |
119 | unsigned int msecs; |
120 | ||
121 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
122 | msecs += (random32() % 2 * BATADV_JITTER); | |
123 | ||
124 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
125 | } |
126 | ||
127 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 128 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 129 | { |
42d0b044 | 130 | return jiffies + msecs_to_jiffies(random32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
131 | } |
132 | ||
133 | /* apply hop penalty for a normal link */ | |
56303d34 SE |
134 | static uint8_t batadv_hop_penalty(uint8_t tq, |
135 | const struct batadv_priv *bat_priv) | |
b9dacc52 ML |
136 | { |
137 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
138 | int new_tq; |
139 | ||
140 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
141 | new_tq /= BATADV_TQ_MAX_VALUE; | |
142 | ||
143 | return new_tq; | |
b9dacc52 ML |
144 | } |
145 | ||
fc957275 | 146 | /* is there another aggregated packet here? */ |
fe8bc396 SE |
147 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
148 | int tt_num_changes) | |
fc957275 | 149 | { |
08c36d3e SE |
150 | int next_buff_pos = 0; |
151 | ||
7e071c79 | 152 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
08c36d3e | 153 | next_buff_pos += batadv_tt_len(tt_num_changes); |
fc957275 ML |
154 | |
155 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 156 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
157 | } |
158 | ||
b9dacc52 | 159 | /* send a batman ogm to a given interface */ |
56303d34 SE |
160 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
161 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 162 | { |
56303d34 | 163 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
b9dacc52 ML |
164 | char *fwd_str; |
165 | uint8_t packet_num; | |
166 | int16_t buff_pos; | |
96412690 | 167 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 168 | struct sk_buff *skb; |
c67893d1 | 169 | uint8_t *packet_pos; |
b9dacc52 | 170 | |
e9a4f295 | 171 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
172 | return; |
173 | ||
174 | packet_num = 0; | |
175 | buff_pos = 0; | |
c67893d1 SE |
176 | packet_pos = forw_packet->skb->data; |
177 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
178 | |
179 | /* adjust all flags and log packets */ | |
fe8bc396 | 180 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
96412690 | 181 | batadv_ogm_packet->tt_num_changes)) { |
b9dacc52 ML |
182 | |
183 | /* we might have aggregated direct link packets with an | |
9cfc7bd6 SE |
184 | * ordinary base packet |
185 | */ | |
8de47de5 SE |
186 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
187 | forw_packet->if_incoming == hard_iface) | |
96412690 | 188 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 189 | else |
96412690 | 190 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 191 | |
c67893d1 SE |
192 | if (packet_num > 0 || !forw_packet->own) |
193 | fwd_str = "Forwarding"; | |
194 | else | |
195 | fwd_str = "Sending own"; | |
196 | ||
39c75a51 | 197 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
198 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n", |
199 | fwd_str, (packet_num > 0 ? "aggregated " : ""), | |
96412690 SE |
200 | batadv_ogm_packet->orig, |
201 | ntohl(batadv_ogm_packet->seqno), | |
202 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl, | |
203 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? | |
1eda58bf | 204 | "on" : "off"), |
96412690 | 205 | batadv_ogm_packet->ttvn, hard_iface->net_dev->name, |
1eda58bf | 206 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 207 | |
7e071c79 | 208 | buff_pos += BATADV_OGM_HLEN; |
96412690 | 209 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
b9dacc52 | 210 | packet_num++; |
c67893d1 SE |
211 | packet_pos = forw_packet->skb->data + buff_pos; |
212 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
213 | } |
214 | ||
215 | /* create clone because function is called more than once */ | |
216 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 217 | if (skb) { |
d69909d2 SE |
218 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
219 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 220 | skb->len + ETH_HLEN); |
3193e8fd | 221 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
f8214865 | 222 | } |
b9dacc52 ML |
223 | } |
224 | ||
225 | /* send a batman ogm packet */ | |
56303d34 | 226 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 227 | { |
56303d34 | 228 | struct batadv_hard_iface *hard_iface; |
b9dacc52 | 229 | struct net_device *soft_iface; |
56303d34 SE |
230 | struct batadv_priv *bat_priv; |
231 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 232 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 233 | unsigned char directlink; |
c67893d1 | 234 | uint8_t *packet_pos; |
b9dacc52 | 235 | |
c67893d1 SE |
236 | packet_pos = forw_packet->skb->data; |
237 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
96412690 | 238 | directlink = (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0); |
b9dacc52 ML |
239 | |
240 | if (!forw_packet->if_incoming) { | |
86ceb360 | 241 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
242 | goto out; |
243 | } | |
244 | ||
245 | soft_iface = forw_packet->if_incoming->soft_iface; | |
246 | bat_priv = netdev_priv(soft_iface); | |
247 | ||
e9a4f295 | 248 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
249 | goto out; |
250 | ||
e5d89254 | 251 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 ML |
252 | if (!primary_if) |
253 | goto out; | |
254 | ||
9cfc7bd6 SE |
255 | /* multihomed peer assumed |
256 | * non-primary OGMs are only broadcasted on their interface | |
257 | */ | |
96412690 | 258 | if ((directlink && (batadv_ogm_packet->header.ttl == 1)) || |
b9dacc52 ML |
259 | (forw_packet->own && (forw_packet->if_incoming != primary_if))) { |
260 | ||
261 | /* FIXME: what about aggregated packets ? */ | |
39c75a51 | 262 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
263 | "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n", |
264 | (forw_packet->own ? "Sending own" : "Forwarding"), | |
96412690 SE |
265 | batadv_ogm_packet->orig, |
266 | ntohl(batadv_ogm_packet->seqno), | |
267 | batadv_ogm_packet->header.ttl, | |
1eda58bf SE |
268 | forw_packet->if_incoming->net_dev->name, |
269 | forw_packet->if_incoming->net_dev->dev_addr); | |
b9dacc52 ML |
270 | |
271 | /* skb is only used once and than forw_packet is free'd */ | |
9455e34c SE |
272 | batadv_send_skb_packet(forw_packet->skb, |
273 | forw_packet->if_incoming, | |
3193e8fd | 274 | batadv_broadcast_addr); |
b9dacc52 ML |
275 | forw_packet->skb = NULL; |
276 | ||
277 | goto out; | |
278 | } | |
279 | ||
280 | /* broadcast on every interface */ | |
281 | rcu_read_lock(); | |
3193e8fd | 282 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
b9dacc52 ML |
283 | if (hard_iface->soft_iface != soft_iface) |
284 | continue; | |
285 | ||
fe8bc396 | 286 | batadv_iv_ogm_send_to_if(forw_packet, hard_iface); |
b9dacc52 ML |
287 | } |
288 | rcu_read_unlock(); | |
289 | ||
290 | out: | |
291 | if (primary_if) | |
e5d89254 | 292 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
293 | } |
294 | ||
295 | /* return true if new_packet can be aggregated with forw_packet */ | |
fe8bc396 | 296 | static bool |
96412690 | 297 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 298 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
299 | int packet_len, unsigned long send_time, |
300 | bool directlink, | |
56303d34 SE |
301 | const struct batadv_hard_iface *if_incoming, |
302 | const struct batadv_forw_packet *forw_packet) | |
b9dacc52 | 303 | { |
96412690 | 304 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 305 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 306 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 307 | bool res = false; |
42d0b044 | 308 | unsigned long aggregation_end_time; |
b9dacc52 | 309 | |
96412690 | 310 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
311 | aggregation_end_time = send_time; |
312 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 313 | |
9cfc7bd6 | 314 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
315 | * if: |
316 | * | |
317 | * - the send time is within our MAX_AGGREGATION_MS time | |
318 | * - the resulting packet wont be bigger than | |
319 | * MAX_AGGREGATION_BYTES | |
320 | */ | |
b9dacc52 | 321 | if (time_before(send_time, forw_packet->send_time) && |
42d0b044 SE |
322 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
323 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { | |
b9dacc52 | 324 | |
9cfc7bd6 | 325 | /* check aggregation compatibility |
b9dacc52 ML |
326 | * -> direct link packets are broadcasted on |
327 | * their interface only | |
328 | * -> aggregate packet if the current packet is | |
329 | * a "global" packet as well as the base | |
330 | * packet | |
331 | */ | |
e5d89254 | 332 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 ML |
333 | if (!primary_if) |
334 | goto out; | |
335 | ||
336 | /* packets without direct link flag and high TTL | |
9cfc7bd6 SE |
337 | * are flooded through the net |
338 | */ | |
b9dacc52 | 339 | if ((!directlink) && |
96412690 SE |
340 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
341 | (batadv_ogm_packet->header.ttl != 1) && | |
b9dacc52 ML |
342 | |
343 | /* own packets originating non-primary | |
9cfc7bd6 SE |
344 | * interfaces leave only that interface |
345 | */ | |
b9dacc52 ML |
346 | ((!forw_packet->own) || |
347 | (forw_packet->if_incoming == primary_if))) { | |
348 | res = true; | |
349 | goto out; | |
350 | } | |
351 | ||
352 | /* if the incoming packet is sent via this one | |
9cfc7bd6 SE |
353 | * interface only - we still can aggregate |
354 | */ | |
b9dacc52 | 355 | if ((directlink) && |
fe8bc396 | 356 | (new_bat_ogm_packet->header.ttl == 1) && |
b9dacc52 ML |
357 | (forw_packet->if_incoming == if_incoming) && |
358 | ||
359 | /* packets from direct neighbors or | |
360 | * own secondary interface packets | |
9cfc7bd6 SE |
361 | * (= secondary interface packets in general) |
362 | */ | |
96412690 | 363 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
b9dacc52 ML |
364 | (forw_packet->own && |
365 | forw_packet->if_incoming != primary_if))) { | |
366 | res = true; | |
367 | goto out; | |
368 | } | |
369 | } | |
370 | ||
371 | out: | |
372 | if (primary_if) | |
e5d89254 | 373 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
374 | return res; |
375 | } | |
376 | ||
377 | /* create a new aggregated packet and add this packet to it */ | |
fe8bc396 SE |
378 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
379 | int packet_len, unsigned long send_time, | |
380 | bool direct_link, | |
56303d34 | 381 | struct batadv_hard_iface *if_incoming, |
fe8bc396 | 382 | int own_packet) |
b9dacc52 | 383 | { |
56303d34 SE |
384 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
385 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 386 | unsigned char *skb_buff; |
42d0b044 | 387 | unsigned int skb_size; |
b9dacc52 ML |
388 | |
389 | if (!atomic_inc_not_zero(&if_incoming->refcount)) | |
390 | return; | |
391 | ||
392 | /* own packet should always be scheduled */ | |
393 | if (!own_packet) { | |
3e34819e | 394 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 395 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 396 | "batman packet queue full\n"); |
b9dacc52 ML |
397 | goto out; |
398 | } | |
399 | } | |
400 | ||
401 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
402 | if (!forw_packet_aggr) { | |
403 | if (!own_packet) | |
404 | atomic_inc(&bat_priv->batman_queue_left); | |
405 | goto out; | |
406 | } | |
407 | ||
408 | if ((atomic_read(&bat_priv->aggregated_ogms)) && | |
42d0b044 SE |
409 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
410 | skb_size = BATADV_MAX_AGGREGATION_BYTES + ETH_HLEN; | |
b9dacc52 | 411 | else |
42d0b044 | 412 | skb_size = packet_len + ETH_HLEN; |
b9dacc52 | 413 | |
42d0b044 | 414 | forw_packet_aggr->skb = dev_alloc_skb(skb_size); |
b9dacc52 ML |
415 | if (!forw_packet_aggr->skb) { |
416 | if (!own_packet) | |
417 | atomic_inc(&bat_priv->batman_queue_left); | |
418 | kfree(forw_packet_aggr); | |
419 | goto out; | |
420 | } | |
0d125074 | 421 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 ML |
422 | |
423 | INIT_HLIST_NODE(&forw_packet_aggr->list); | |
424 | ||
425 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
426 | forw_packet_aggr->packet_len = packet_len; | |
427 | memcpy(skb_buff, packet_buff, packet_len); | |
428 | ||
429 | forw_packet_aggr->own = own_packet; | |
430 | forw_packet_aggr->if_incoming = if_incoming; | |
431 | forw_packet_aggr->num_packets = 0; | |
42d0b044 | 432 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
433 | forw_packet_aggr->send_time = send_time; |
434 | ||
435 | /* save packet direct link flag status */ | |
436 | if (direct_link) | |
437 | forw_packet_aggr->direct_link_flags |= 1; | |
438 | ||
439 | /* add new packet to packet list */ | |
440 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
441 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
442 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
443 | ||
444 | /* start timer for this packet */ | |
445 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 446 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 447 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
448 | &forw_packet_aggr->delayed_work, |
449 | send_time - jiffies); | |
450 | ||
451 | return; | |
452 | out: | |
e5d89254 | 453 | batadv_hardif_free_ref(if_incoming); |
b9dacc52 ML |
454 | } |
455 | ||
456 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 457 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
458 | const unsigned char *packet_buff, |
459 | int packet_len, bool direct_link) | |
b9dacc52 ML |
460 | { |
461 | unsigned char *skb_buff; | |
8de47de5 | 462 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
463 | |
464 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
465 | memcpy(skb_buff, packet_buff, packet_len); | |
466 | forw_packet_aggr->packet_len += packet_len; | |
467 | forw_packet_aggr->num_packets++; | |
468 | ||
469 | /* save packet direct link flag status */ | |
8de47de5 SE |
470 | if (direct_link) { |
471 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
472 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
473 | } | |
b9dacc52 ML |
474 | } |
475 | ||
56303d34 | 476 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
477 | unsigned char *packet_buff, |
478 | int packet_len, | |
56303d34 | 479 | struct batadv_hard_iface *if_incoming, |
fe8bc396 | 480 | int own_packet, unsigned long send_time) |
b9dacc52 | 481 | { |
9cfc7bd6 | 482 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
483 | * _pos -> pointer to the position in the queue |
484 | */ | |
56303d34 SE |
485 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
486 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
b9dacc52 | 487 | struct hlist_node *tmp_node; |
96412690 | 488 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 489 | bool direct_link; |
42d0b044 | 490 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 491 | |
96412690 SE |
492 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
493 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; | |
42d0b044 | 494 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
495 | |
496 | /* find position for the packet in the forward queue */ | |
497 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
498 | /* own packets are not to be aggregated */ | |
499 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { | |
500 | hlist_for_each_entry(forw_packet_pos, tmp_node, | |
501 | &bat_priv->forw_bat_list, list) { | |
96412690 | 502 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
503 | bat_priv, packet_len, |
504 | send_time, direct_link, | |
505 | if_incoming, | |
506 | forw_packet_pos)) { | |
b9dacc52 ML |
507 | forw_packet_aggr = forw_packet_pos; |
508 | break; | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
513 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
514 | * suitable aggregation packet found |
515 | */ | |
b9dacc52 ML |
516 | if (!forw_packet_aggr) { |
517 | /* the following section can run without the lock */ | |
518 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
519 | ||
9cfc7bd6 | 520 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
521 | * we hold it back for a while, so that it might be aggregated |
522 | * later on | |
523 | */ | |
42d0b044 SE |
524 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
525 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 526 | |
fe8bc396 SE |
527 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
528 | send_time, direct_link, | |
529 | if_incoming, own_packet); | |
b9dacc52 | 530 | } else { |
fe8bc396 SE |
531 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
532 | packet_len, direct_link); | |
b9dacc52 ML |
533 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
534 | } | |
535 | } | |
536 | ||
56303d34 | 537 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 538 | const struct ethhdr *ethhdr, |
96412690 | 539 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
540 | bool is_single_hop_neigh, |
541 | bool is_from_best_next_hop, | |
56303d34 | 542 | struct batadv_hard_iface *if_incoming) |
b9dacc52 | 543 | { |
56303d34 | 544 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
b9dacc52 ML |
545 | uint8_t tt_num_changes; |
546 | ||
96412690 | 547 | if (batadv_ogm_packet->header.ttl <= 1) { |
39c75a51 | 548 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
549 | return; |
550 | } | |
551 | ||
13b2541b ML |
552 | if (!is_from_best_next_hop) { |
553 | /* Mark the forwarded packet when it is not coming from our | |
554 | * best next hop. We still need to forward the packet for our | |
555 | * neighbor link quality detection to work in case the packet | |
556 | * originated from a single hop neighbor. Otherwise we can | |
557 | * simply drop the ogm. | |
558 | */ | |
559 | if (is_single_hop_neigh) | |
96412690 | 560 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
561 | else |
562 | return; | |
563 | } | |
b9dacc52 | 564 | |
96412690 | 565 | tt_num_changes = batadv_ogm_packet->tt_num_changes; |
b9dacc52 | 566 | |
96412690 SE |
567 | batadv_ogm_packet->header.ttl--; |
568 | memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); | |
b9dacc52 | 569 | |
b9dacc52 | 570 | /* apply hop penalty */ |
96412690 | 571 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 572 | bat_priv); |
b9dacc52 | 573 | |
39c75a51 | 574 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 575 | "Forwarding packet: tq: %i, ttl: %i\n", |
96412690 | 576 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl); |
b9dacc52 | 577 | |
b9dacc52 | 578 | /* switch of primaries first hop flag when forwarding */ |
96412690 | 579 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
75cd33f8 | 580 | if (is_single_hop_neigh) |
96412690 | 581 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 582 | else |
96412690 | 583 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 584 | |
96412690 | 585 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
7e071c79 | 586 | BATADV_OGM_HLEN + batadv_tt_len(tt_num_changes), |
fe8bc396 | 587 | if_incoming, 0, batadv_iv_ogm_fwd_send_time()); |
b9dacc52 ML |
588 | } |
589 | ||
56303d34 | 590 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 591 | { |
56303d34 | 592 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
96412690 | 593 | struct batadv_ogm_packet *batadv_ogm_packet; |
56303d34 | 594 | struct batadv_hard_iface *primary_if; |
be9aa4c1 | 595 | int vis_server, tt_num_changes = 0; |
bbb1f90e SE |
596 | uint32_t seqno; |
597 | uint8_t bandwidth; | |
b9dacc52 ML |
598 | |
599 | vis_server = atomic_read(&bat_priv->vis_mode); | |
e5d89254 | 600 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 601 | |
be9aa4c1 ML |
602 | if (hard_iface == primary_if) |
603 | tt_num_changes = batadv_tt_append_diff(bat_priv, | |
604 | &hard_iface->packet_buff, | |
605 | &hard_iface->packet_len, | |
7e071c79 | 606 | BATADV_OGM_HLEN); |
be9aa4c1 | 607 | |
96412690 | 608 | batadv_ogm_packet = (struct batadv_ogm_packet *)hard_iface->packet_buff; |
b9dacc52 ML |
609 | |
610 | /* change sequence number to network order */ | |
bbb1f90e SE |
611 | seqno = (uint32_t)atomic_read(&hard_iface->seqno); |
612 | batadv_ogm_packet->seqno = htonl(seqno); | |
be9aa4c1 | 613 | atomic_inc(&hard_iface->seqno); |
b9dacc52 | 614 | |
807736f6 SE |
615 | batadv_ogm_packet->ttvn = atomic_read(&bat_priv->tt.vn); |
616 | batadv_ogm_packet->tt_crc = htons(bat_priv->tt.local_crc); | |
b9dacc52 | 617 | if (tt_num_changes >= 0) |
96412690 | 618 | batadv_ogm_packet->tt_num_changes = tt_num_changes; |
b9dacc52 | 619 | |
acd34afa | 620 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC) |
96412690 | 621 | batadv_ogm_packet->flags |= BATADV_VIS_SERVER; |
b9dacc52 | 622 | else |
96412690 | 623 | batadv_ogm_packet->flags &= ~BATADV_VIS_SERVER; |
b9dacc52 | 624 | |
bbb1f90e SE |
625 | if (hard_iface == primary_if && |
626 | atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_SERVER) { | |
627 | bandwidth = (uint8_t)atomic_read(&bat_priv->gw_bandwidth); | |
628 | batadv_ogm_packet->gw_flags = bandwidth; | |
629 | } else { | |
96412690 | 630 | batadv_ogm_packet->gw_flags = BATADV_NO_FLAGS; |
bbb1f90e | 631 | } |
b9dacc52 | 632 | |
30d3c511 | 633 | batadv_slide_own_bcast_window(hard_iface); |
fe8bc396 SE |
634 | batadv_iv_ogm_queue_add(bat_priv, hard_iface->packet_buff, |
635 | hard_iface->packet_len, hard_iface, 1, | |
636 | batadv_iv_ogm_emit_send_time(bat_priv)); | |
b9dacc52 ML |
637 | |
638 | if (primary_if) | |
e5d89254 | 639 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
640 | } |
641 | ||
fe8bc396 | 642 | static void |
56303d34 SE |
643 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
644 | struct batadv_orig_node *orig_node, | |
fe8bc396 | 645 | const struct ethhdr *ethhdr, |
96412690 | 646 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 647 | struct batadv_hard_iface *if_incoming, |
fe8bc396 SE |
648 | const unsigned char *tt_buff, |
649 | int is_duplicate) | |
fc957275 | 650 | { |
56303d34 SE |
651 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
652 | struct batadv_neigh_node *router = NULL; | |
653 | struct batadv_orig_node *orig_node_tmp; | |
fc957275 | 654 | struct hlist_node *node; |
7caf69fb | 655 | int if_num; |
bbb1f90e | 656 | uint8_t sum_orig, sum_neigh; |
1eda58bf | 657 | uint8_t *neigh_addr; |
bbb1f90e | 658 | uint8_t tq_avg; |
fc957275 | 659 | |
39c75a51 | 660 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 661 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
662 | |
663 | rcu_read_lock(); | |
664 | hlist_for_each_entry_rcu(tmp_neigh_node, node, | |
665 | &orig_node->neigh_list, list) { | |
1eda58bf SE |
666 | neigh_addr = tmp_neigh_node->addr; |
667 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
668 | tmp_neigh_node->if_incoming == if_incoming && | |
669 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { | |
fc957275 | 670 | if (neigh_node) |
7d211efc | 671 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
672 | neigh_node = tmp_neigh_node; |
673 | continue; | |
674 | } | |
675 | ||
676 | if (is_duplicate) | |
677 | continue; | |
678 | ||
e3b0d0de | 679 | spin_lock_bh(&tmp_neigh_node->lq_update_lock); |
925a6672 SE |
680 | batadv_ring_buffer_set(tmp_neigh_node->tq_recv, |
681 | &tmp_neigh_node->tq_index, 0); | |
bbb1f90e SE |
682 | tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->tq_recv); |
683 | tmp_neigh_node->tq_avg = tq_avg; | |
e3b0d0de | 684 | spin_unlock_bh(&tmp_neigh_node->lq_update_lock); |
fc957275 ML |
685 | } |
686 | ||
687 | if (!neigh_node) { | |
56303d34 | 688 | struct batadv_orig_node *orig_tmp; |
fc957275 | 689 | |
7d211efc | 690 | orig_tmp = batadv_get_orig_node(bat_priv, ethhdr->h_source); |
fc957275 ML |
691 | if (!orig_tmp) |
692 | goto unlock; | |
693 | ||
fe8bc396 SE |
694 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
695 | ethhdr->h_source, | |
696 | orig_node, orig_tmp, | |
96412690 | 697 | batadv_ogm_packet->seqno); |
fc957275 | 698 | |
7d211efc | 699 | batadv_orig_node_free_ref(orig_tmp); |
fc957275 ML |
700 | if (!neigh_node) |
701 | goto unlock; | |
702 | } else | |
39c75a51 | 703 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 704 | "Updating existing last-hop neighbor of originator\n"); |
fc957275 ML |
705 | |
706 | rcu_read_unlock(); | |
707 | ||
96412690 | 708 | orig_node->flags = batadv_ogm_packet->flags; |
d7b2a97e | 709 | neigh_node->last_seen = jiffies; |
fc957275 | 710 | |
e3b0d0de | 711 | spin_lock_bh(&neigh_node->lq_update_lock); |
925a6672 SE |
712 | batadv_ring_buffer_set(neigh_node->tq_recv, |
713 | &neigh_node->tq_index, | |
96412690 | 714 | batadv_ogm_packet->tq); |
925a6672 | 715 | neigh_node->tq_avg = batadv_ring_buffer_avg(neigh_node->tq_recv); |
e3b0d0de | 716 | spin_unlock_bh(&neigh_node->lq_update_lock); |
fc957275 ML |
717 | |
718 | if (!is_duplicate) { | |
96412690 SE |
719 | orig_node->last_ttl = batadv_ogm_packet->header.ttl; |
720 | neigh_node->last_ttl = batadv_ogm_packet->header.ttl; | |
fc957275 ML |
721 | } |
722 | ||
30d3c511 | 723 | batadv_bonding_candidate_add(orig_node, neigh_node); |
fc957275 ML |
724 | |
725 | /* if this neighbor already is our next hop there is nothing | |
9cfc7bd6 SE |
726 | * to change |
727 | */ | |
7d211efc | 728 | router = batadv_orig_node_get_router(orig_node); |
fc957275 ML |
729 | if (router == neigh_node) |
730 | goto update_tt; | |
731 | ||
732 | /* if this neighbor does not offer a better TQ we won't consider it */ | |
733 | if (router && (router->tq_avg > neigh_node->tq_avg)) | |
734 | goto update_tt; | |
735 | ||
736 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
737 | * won't consider it either |
738 | */ | |
fc957275 ML |
739 | if (router && (neigh_node->tq_avg == router->tq_avg)) { |
740 | orig_node_tmp = router->orig_node; | |
741 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); | |
7caf69fb LL |
742 | if_num = router->if_incoming->if_num; |
743 | sum_orig = orig_node_tmp->bcast_own_sum[if_num]; | |
fc957275 ML |
744 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
745 | ||
746 | orig_node_tmp = neigh_node->orig_node; | |
747 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); | |
7caf69fb LL |
748 | if_num = neigh_node->if_incoming->if_num; |
749 | sum_neigh = orig_node_tmp->bcast_own_sum[if_num]; | |
fc957275 ML |
750 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
751 | ||
bbb1f90e | 752 | if (sum_orig >= sum_neigh) |
fc957275 ML |
753 | goto update_tt; |
754 | } | |
755 | ||
30d3c511 | 756 | batadv_update_route(bat_priv, orig_node, neigh_node); |
fc957275 ML |
757 | |
758 | update_tt: | |
759 | /* I have to check for transtable changes only if the OGM has been | |
9cfc7bd6 SE |
760 | * sent through a primary interface |
761 | */ | |
96412690 SE |
762 | if (((batadv_ogm_packet->orig != ethhdr->h_source) && |
763 | (batadv_ogm_packet->header.ttl > 2)) || | |
764 | (batadv_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP)) | |
08c36d3e | 765 | batadv_tt_update_orig(bat_priv, orig_node, tt_buff, |
96412690 SE |
766 | batadv_ogm_packet->tt_num_changes, |
767 | batadv_ogm_packet->ttvn, | |
768 | ntohs(batadv_ogm_packet->tt_crc)); | |
fc957275 | 769 | |
96412690 | 770 | if (orig_node->gw_flags != batadv_ogm_packet->gw_flags) |
7cf06bc6 | 771 | batadv_gw_node_update(bat_priv, orig_node, |
96412690 | 772 | batadv_ogm_packet->gw_flags); |
fc957275 | 773 | |
96412690 | 774 | orig_node->gw_flags = batadv_ogm_packet->gw_flags; |
fc957275 ML |
775 | |
776 | /* restart gateway selection if fast or late switching was enabled */ | |
777 | if ((orig_node->gw_flags) && | |
cd646ab1 | 778 | (atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_CLIENT) && |
fc957275 | 779 | (atomic_read(&bat_priv->gw_sel_class) > 2)) |
7cf06bc6 | 780 | batadv_gw_check_election(bat_priv, orig_node); |
fc957275 ML |
781 | |
782 | goto out; | |
783 | ||
784 | unlock: | |
785 | rcu_read_unlock(); | |
786 | out: | |
787 | if (neigh_node) | |
7d211efc | 788 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 | 789 | if (router) |
7d211efc | 790 | batadv_neigh_node_free_ref(router); |
fc957275 ML |
791 | } |
792 | ||
56303d34 SE |
793 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
794 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 795 | struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 796 | struct batadv_hard_iface *if_incoming) |
fc957275 | 797 | { |
56303d34 SE |
798 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
799 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
fc957275 ML |
800 | struct hlist_node *node; |
801 | uint8_t total_count; | |
42d0b044 SE |
802 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
803 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; | |
804 | int tq_asym_penalty, inv_asym_penalty, ret = 0; | |
805 | unsigned int combined_tq; | |
fc957275 ML |
806 | |
807 | /* find corresponding one hop neighbor */ | |
808 | rcu_read_lock(); | |
809 | hlist_for_each_entry_rcu(tmp_neigh_node, node, | |
810 | &orig_neigh_node->neigh_list, list) { | |
811 | ||
1eda58bf SE |
812 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
813 | orig_neigh_node->orig)) | |
fc957275 ML |
814 | continue; |
815 | ||
816 | if (tmp_neigh_node->if_incoming != if_incoming) | |
817 | continue; | |
818 | ||
819 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
820 | continue; | |
821 | ||
822 | neigh_node = tmp_neigh_node; | |
823 | break; | |
824 | } | |
825 | rcu_read_unlock(); | |
826 | ||
827 | if (!neigh_node) | |
fe8bc396 SE |
828 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
829 | orig_neigh_node->orig, | |
830 | orig_neigh_node, | |
831 | orig_neigh_node, | |
96412690 | 832 | batadv_ogm_packet->seqno); |
fc957275 ML |
833 | |
834 | if (!neigh_node) | |
835 | goto out; | |
836 | ||
d7b2a97e | 837 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 838 | if (orig_node == orig_neigh_node) |
d7b2a97e | 839 | neigh_node->last_seen = jiffies; |
fc957275 | 840 | |
d7b2a97e | 841 | orig_node->last_seen = jiffies; |
fc957275 ML |
842 | |
843 | /* find packet count of corresponding one hop neighbor */ | |
844 | spin_lock_bh(&orig_node->ogm_cnt_lock); | |
845 | orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num]; | |
846 | neigh_rq_count = neigh_node->real_packet_count; | |
847 | spin_unlock_bh(&orig_node->ogm_cnt_lock); | |
848 | ||
849 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
850 | if (orig_eq_count > neigh_rq_count) |
851 | total_count = neigh_rq_count; | |
852 | else | |
853 | total_count = orig_eq_count; | |
fc957275 | 854 | |
9cfc7bd6 SE |
855 | /* if we have too few packets (too less data) we set tq_own to zero |
856 | * if we receive too few packets it is not considered bidirectional | |
857 | */ | |
42d0b044 SE |
858 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
859 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
860 | tq_own = 0; |
861 | else | |
862 | /* neigh_node->real_packet_count is never zero as we | |
863 | * only purge old information when getting new | |
9cfc7bd6 SE |
864 | * information |
865 | */ | |
42d0b044 | 866 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 867 | |
21a1236b | 868 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
869 | * affect the nearly-symmetric links only a little, but |
870 | * punishes asymmetric links more. This will give a value | |
871 | * between 0 and TQ_MAX_VALUE | |
872 | */ | |
42d0b044 SE |
873 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
874 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
875 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
876 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
877 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
878 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
879 | inv_asym_penalty /= neigh_rq_max_cube; | |
880 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
881 | ||
96412690 | 882 | combined_tq = batadv_ogm_packet->tq * tq_own * tq_asym_penalty; |
42d0b044 | 883 | combined_tq /= BATADV_TQ_MAX_VALUE * BATADV_TQ_MAX_VALUE; |
96412690 | 884 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 885 | |
39c75a51 | 886 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
887 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n", |
888 | orig_node->orig, orig_neigh_node->orig, total_count, | |
889 | neigh_rq_count, tq_own, | |
96412690 | 890 | tq_asym_penalty, batadv_ogm_packet->tq); |
fc957275 ML |
891 | |
892 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
893 | * consider it bidirectional |
894 | */ | |
96412690 | 895 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
fc957275 ML |
896 | ret = 1; |
897 | ||
898 | out: | |
899 | if (neigh_node) | |
7d211efc | 900 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
901 | return ret; |
902 | } | |
903 | ||
904 | /* processes a batman packet for all interfaces, adjusts the sequence number and | |
905 | * finds out whether it is a duplicate. | |
906 | * returns: | |
907 | * 1 the packet is a duplicate | |
908 | * 0 the packet has not yet been received | |
909 | * -1 the packet is old and has been received while the seqno window | |
910 | * was protected. Caller should drop it. | |
911 | */ | |
fe8bc396 SE |
912 | static int |
913 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, | |
96412690 | 914 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 915 | const struct batadv_hard_iface *if_incoming) |
fc957275 | 916 | { |
56303d34 SE |
917 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
918 | struct batadv_orig_node *orig_node; | |
919 | struct batadv_neigh_node *tmp_neigh_node; | |
fc957275 ML |
920 | struct hlist_node *node; |
921 | int is_duplicate = 0; | |
922 | int32_t seq_diff; | |
923 | int need_update = 0; | |
924 | int set_mark, ret = -1; | |
96412690 | 925 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
1eda58bf | 926 | uint8_t *neigh_addr; |
bbb1f90e | 927 | uint8_t packet_count; |
fc957275 | 928 | |
96412690 | 929 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
fc957275 ML |
930 | if (!orig_node) |
931 | return 0; | |
932 | ||
933 | spin_lock_bh(&orig_node->ogm_cnt_lock); | |
e0f5211f | 934 | seq_diff = seqno - orig_node->last_real_seqno; |
fc957275 ML |
935 | |
936 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 937 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 SE |
938 | batadv_window_protected(bat_priv, seq_diff, |
939 | &orig_node->batman_seqno_reset)) | |
fc957275 ML |
940 | goto out; |
941 | ||
942 | rcu_read_lock(); | |
943 | hlist_for_each_entry_rcu(tmp_neigh_node, node, | |
944 | &orig_node->neigh_list, list) { | |
945 | ||
9b4a1159 SE |
946 | is_duplicate |= batadv_test_bit(tmp_neigh_node->real_bits, |
947 | orig_node->last_real_seqno, | |
948 | seqno); | |
fc957275 | 949 | |
1eda58bf SE |
950 | neigh_addr = tmp_neigh_node->addr; |
951 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
952 | tmp_neigh_node->if_incoming == if_incoming) | |
fc957275 ML |
953 | set_mark = 1; |
954 | else | |
955 | set_mark = 0; | |
956 | ||
957 | /* if the window moved, set the update flag. */ | |
0f5f9322 SE |
958 | need_update |= batadv_bit_get_packet(bat_priv, |
959 | tmp_neigh_node->real_bits, | |
960 | seq_diff, set_mark); | |
fc957275 | 961 | |
bbb1f90e SE |
962 | packet_count = bitmap_weight(tmp_neigh_node->real_bits, |
963 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
964 | tmp_neigh_node->real_packet_count = packet_count; | |
fc957275 ML |
965 | } |
966 | rcu_read_unlock(); | |
967 | ||
968 | if (need_update) { | |
39c75a51 | 969 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
970 | "updating last_seqno: old %u, new %u\n", |
971 | orig_node->last_real_seqno, seqno); | |
e0f5211f | 972 | orig_node->last_real_seqno = seqno; |
fc957275 ML |
973 | } |
974 | ||
975 | ret = is_duplicate; | |
976 | ||
977 | out: | |
978 | spin_unlock_bh(&orig_node->ogm_cnt_lock); | |
7d211efc | 979 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
980 | return ret; |
981 | } | |
982 | ||
fe8bc396 | 983 | static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, |
96412690 | 984 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 | 985 | const unsigned char *tt_buff, |
56303d34 | 986 | struct batadv_hard_iface *if_incoming) |
fc957275 | 987 | { |
56303d34 SE |
988 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
989 | struct batadv_hard_iface *hard_iface; | |
990 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
991 | struct batadv_neigh_node *router = NULL, *router_router = NULL; | |
992 | struct batadv_neigh_node *orig_neigh_router = NULL; | |
fc957275 ML |
993 | int has_directlink_flag; |
994 | int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; | |
fe8bc396 | 995 | int is_broadcast = 0, is_bidirect; |
75cd33f8 | 996 | bool is_single_hop_neigh = false; |
13b2541b | 997 | bool is_from_best_next_hop = false; |
fe8bc396 | 998 | int is_duplicate, sameseq, simlar_ttl; |
fc957275 | 999 | uint32_t if_incoming_seqno; |
1eda58bf | 1000 | uint8_t *prev_sender; |
fc957275 ML |
1001 | |
1002 | /* Silently drop when the batman packet is actually not a | |
1003 | * correct packet. | |
1004 | * | |
1005 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1006 | * minimum frame length of 64 byte) and the aggregation interprets | |
1007 | * it as an additional length. | |
1008 | * | |
1009 | * TODO: A more sane solution would be to have a bit in the | |
96412690 | 1010 | * batadv_ogm_packet to detect whether the packet is the last |
fc957275 ML |
1011 | * packet in an aggregation. Here we expect that the padding |
1012 | * is always zero (or not 0x01) | |
1013 | */ | |
96412690 | 1014 | if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM) |
fc957275 ML |
1015 | return; |
1016 | ||
1017 | /* could be changed by schedule_own_packet() */ | |
1018 | if_incoming_seqno = atomic_read(&if_incoming->seqno); | |
1019 | ||
96412690 | 1020 | if (batadv_ogm_packet->flags & BATADV_DIRECTLINK) |
acd34afa SE |
1021 | has_directlink_flag = 1; |
1022 | else | |
1023 | has_directlink_flag = 0; | |
fc957275 | 1024 | |
96412690 | 1025 | if (batadv_compare_eth(ethhdr->h_source, batadv_ogm_packet->orig)) |
75cd33f8 | 1026 | is_single_hop_neigh = true; |
fc957275 | 1027 | |
39c75a51 | 1028 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1029 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n", |
1030 | ethhdr->h_source, if_incoming->net_dev->name, | |
96412690 SE |
1031 | if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig, |
1032 | batadv_ogm_packet->prev_sender, | |
1033 | ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->ttvn, | |
1034 | ntohs(batadv_ogm_packet->tt_crc), | |
1035 | batadv_ogm_packet->tt_num_changes, batadv_ogm_packet->tq, | |
1036 | batadv_ogm_packet->header.ttl, | |
1037 | batadv_ogm_packet->header.version, has_directlink_flag); | |
fc957275 ML |
1038 | |
1039 | rcu_read_lock(); | |
3193e8fd | 1040 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 | 1041 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
fc957275 ML |
1042 | continue; |
1043 | ||
1044 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1045 | continue; | |
1046 | ||
1eda58bf SE |
1047 | if (batadv_compare_eth(ethhdr->h_source, |
1048 | hard_iface->net_dev->dev_addr)) | |
fc957275 ML |
1049 | is_my_addr = 1; |
1050 | ||
96412690 | 1051 | if (batadv_compare_eth(batadv_ogm_packet->orig, |
1eda58bf | 1052 | hard_iface->net_dev->dev_addr)) |
fc957275 ML |
1053 | is_my_orig = 1; |
1054 | ||
96412690 | 1055 | if (batadv_compare_eth(batadv_ogm_packet->prev_sender, |
1eda58bf | 1056 | hard_iface->net_dev->dev_addr)) |
fc957275 ML |
1057 | is_my_oldorig = 1; |
1058 | ||
1059 | if (is_broadcast_ether_addr(ethhdr->h_source)) | |
1060 | is_broadcast = 1; | |
1061 | } | |
1062 | rcu_read_unlock(); | |
1063 | ||
96412690 | 1064 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
39c75a51 | 1065 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1066 | "Drop packet: incompatible batman version (%i)\n", |
96412690 | 1067 | batadv_ogm_packet->header.version); |
fc957275 ML |
1068 | return; |
1069 | } | |
1070 | ||
1071 | if (is_my_addr) { | |
39c75a51 | 1072 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1073 | "Drop packet: received my own broadcast (sender: %pM)\n", |
1074 | ethhdr->h_source); | |
fc957275 ML |
1075 | return; |
1076 | } | |
1077 | ||
1078 | if (is_broadcast) { | |
39c75a51 | 1079 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1080 | "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n", |
1081 | ethhdr->h_source); | |
fc957275 ML |
1082 | return; |
1083 | } | |
1084 | ||
1085 | if (is_my_orig) { | |
1086 | unsigned long *word; | |
1087 | int offset; | |
9b4a1159 | 1088 | int32_t bit_pos; |
42d0b044 SE |
1089 | int16_t if_num; |
1090 | uint8_t *weight; | |
fc957275 | 1091 | |
7d211efc SE |
1092 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
1093 | ethhdr->h_source); | |
fc957275 ML |
1094 | if (!orig_neigh_node) |
1095 | return; | |
1096 | ||
1097 | /* neighbor has to indicate direct link and it has to | |
9cfc7bd6 SE |
1098 | * come via the corresponding interface |
1099 | * save packet seqno for bidirectional check | |
1100 | */ | |
fc957275 | 1101 | if (has_directlink_flag && |
1eda58bf | 1102 | batadv_compare_eth(if_incoming->net_dev->dev_addr, |
96412690 | 1103 | batadv_ogm_packet->orig)) { |
42d0b044 SE |
1104 | if_num = if_incoming->if_num; |
1105 | offset = if_num * BATADV_NUM_WORDS; | |
fc957275 ML |
1106 | |
1107 | spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); | |
1108 | word = &(orig_neigh_node->bcast_own[offset]); | |
9b4a1159 | 1109 | bit_pos = if_incoming_seqno - 2; |
96412690 | 1110 | bit_pos -= ntohl(batadv_ogm_packet->seqno); |
9b4a1159 | 1111 | batadv_set_bit(word, bit_pos); |
42d0b044 SE |
1112 | weight = &orig_neigh_node->bcast_own_sum[if_num]; |
1113 | *weight = bitmap_weight(word, | |
1114 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
fc957275 ML |
1115 | spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); |
1116 | } | |
1117 | ||
39c75a51 | 1118 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1119 | "Drop packet: originator packet from myself (via neighbor)\n"); |
7d211efc | 1120 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 ML |
1121 | return; |
1122 | } | |
1123 | ||
1124 | if (is_my_oldorig) { | |
39c75a51 | 1125 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1126 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", |
1127 | ethhdr->h_source); | |
fc957275 ML |
1128 | return; |
1129 | } | |
1130 | ||
96412690 | 1131 | if (batadv_ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { |
39c75a51 | 1132 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1133 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", |
1134 | ethhdr->h_source); | |
13b2541b ML |
1135 | return; |
1136 | } | |
1137 | ||
96412690 | 1138 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
fc957275 ML |
1139 | if (!orig_node) |
1140 | return; | |
1141 | ||
96412690 | 1142 | is_duplicate = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, |
fe8bc396 | 1143 | if_incoming); |
fc957275 ML |
1144 | |
1145 | if (is_duplicate == -1) { | |
39c75a51 | 1146 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1147 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1148 | ethhdr->h_source); | |
fc957275 ML |
1149 | goto out; |
1150 | } | |
1151 | ||
96412690 | 1152 | if (batadv_ogm_packet->tq == 0) { |
39c75a51 | 1153 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1154 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1155 | goto out; |
1156 | } | |
1157 | ||
7d211efc | 1158 | router = batadv_orig_node_get_router(orig_node); |
fc957275 | 1159 | if (router) |
7d211efc | 1160 | router_router = batadv_orig_node_get_router(router->orig_node); |
fc957275 | 1161 | |
13b2541b | 1162 | if ((router && router->tq_avg != 0) && |
1eda58bf | 1163 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1164 | is_from_best_next_hop = true; |
1165 | ||
96412690 | 1166 | prev_sender = batadv_ogm_packet->prev_sender; |
fc957275 ML |
1167 | /* avoid temporary routing loops */ |
1168 | if (router && router_router && | |
1eda58bf | 1169 | (batadv_compare_eth(router->addr, prev_sender)) && |
96412690 | 1170 | !(batadv_compare_eth(batadv_ogm_packet->orig, prev_sender)) && |
1eda58bf | 1171 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1172 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1173 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1174 | ethhdr->h_source); | |
fc957275 ML |
1175 | goto out; |
1176 | } | |
1177 | ||
1178 | /* if sender is a direct neighbor the sender mac equals | |
9cfc7bd6 SE |
1179 | * originator mac |
1180 | */ | |
c67893d1 SE |
1181 | if (is_single_hop_neigh) |
1182 | orig_neigh_node = orig_node; | |
1183 | else | |
1184 | orig_neigh_node = batadv_get_orig_node(bat_priv, | |
1185 | ethhdr->h_source); | |
1186 | ||
fc957275 ML |
1187 | if (!orig_neigh_node) |
1188 | goto out; | |
1189 | ||
7d211efc | 1190 | orig_neigh_router = batadv_orig_node_get_router(orig_neigh_node); |
fc957275 ML |
1191 | |
1192 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1193 | * don't route towards it |
1194 | */ | |
fc957275 | 1195 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1196 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1197 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1198 | goto out_neigh; |
1199 | } | |
1200 | ||
fe8bc396 | 1201 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
96412690 | 1202 | batadv_ogm_packet, if_incoming); |
fc957275 | 1203 | |
30d3c511 | 1204 | batadv_bonding_save_primary(orig_node, orig_neigh_node, |
96412690 | 1205 | batadv_ogm_packet); |
fc957275 ML |
1206 | |
1207 | /* update ranking if it is not a duplicate or has the same | |
9cfc7bd6 SE |
1208 | * seqno and similar ttl as the non-duplicate |
1209 | */ | |
96412690 SE |
1210 | sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno); |
1211 | simlar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl; | |
fe8bc396 SE |
1212 | if (is_bidirect && (!is_duplicate || (sameseq && simlar_ttl))) |
1213 | batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, | |
96412690 | 1214 | batadv_ogm_packet, if_incoming, |
fe8bc396 | 1215 | tt_buff, is_duplicate); |
fc957275 ML |
1216 | |
1217 | /* is single hop (direct) neighbor */ | |
1218 | if (is_single_hop_neigh) { | |
1219 | ||
1220 | /* mark direct link on incoming interface */ | |
96412690 | 1221 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
fe8bc396 SE |
1222 | is_single_hop_neigh, |
1223 | is_from_best_next_hop, if_incoming); | |
fc957275 | 1224 | |
39c75a51 | 1225 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1226 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1227 | goto out_neigh; |
1228 | } | |
1229 | ||
1230 | /* multihop originator */ | |
fe8bc396 | 1231 | if (!is_bidirect) { |
39c75a51 | 1232 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1233 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1234 | goto out_neigh; |
1235 | } | |
1236 | ||
1237 | if (is_duplicate) { | |
39c75a51 | 1238 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1239 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1240 | goto out_neigh; |
1241 | } | |
1242 | ||
39c75a51 | 1243 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1244 | "Forwarding packet: rebroadcast originator packet\n"); |
96412690 | 1245 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
fe8bc396 SE |
1246 | is_single_hop_neigh, is_from_best_next_hop, |
1247 | if_incoming); | |
fc957275 ML |
1248 | |
1249 | out_neigh: | |
1250 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
7d211efc | 1251 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 ML |
1252 | out: |
1253 | if (router) | |
7d211efc | 1254 | batadv_neigh_node_free_ref(router); |
fc957275 | 1255 | if (router_router) |
7d211efc | 1256 | batadv_neigh_node_free_ref(router_router); |
fc957275 | 1257 | if (orig_neigh_router) |
7d211efc | 1258 | batadv_neigh_node_free_ref(orig_neigh_router); |
fc957275 | 1259 | |
7d211efc | 1260 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
1261 | } |
1262 | ||
fe8bc396 | 1263 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1264 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1265 | { |
56303d34 | 1266 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
96412690 | 1267 | struct batadv_ogm_packet *batadv_ogm_packet; |
8780dad9 ML |
1268 | struct ethhdr *ethhdr; |
1269 | int buff_pos = 0, packet_len; | |
1270 | unsigned char *tt_buff, *packet_buff; | |
c3e29312 | 1271 | bool ret; |
c67893d1 | 1272 | uint8_t *packet_pos; |
c3e29312 | 1273 | |
7e071c79 | 1274 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1275 | if (!ret) |
1276 | return NET_RX_DROP; | |
fc957275 | 1277 | |
edbf12ba ML |
1278 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1279 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1280 | */ | |
fe8bc396 | 1281 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1282 | return NET_RX_DROP; |
1283 | ||
d69909d2 SE |
1284 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1285 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1286 | skb->len + ETH_HLEN); |
1287 | ||
8780dad9 ML |
1288 | packet_len = skb_headlen(skb); |
1289 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
1290 | packet_buff = skb->data; | |
96412690 | 1291 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
fc957275 ML |
1292 | |
1293 | /* unpack the aggregated packets and process them one by one */ | |
1294 | do { | |
7e071c79 | 1295 | tt_buff = packet_buff + buff_pos + BATADV_OGM_HLEN; |
fc957275 | 1296 | |
96412690 | 1297 | batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, tt_buff, |
fe8bc396 | 1298 | if_incoming); |
fc957275 | 1299 | |
7e071c79 | 1300 | buff_pos += BATADV_OGM_HLEN; |
96412690 | 1301 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
fc957275 | 1302 | |
c67893d1 SE |
1303 | packet_pos = packet_buff + buff_pos; |
1304 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
fe8bc396 | 1305 | } while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len, |
96412690 | 1306 | batadv_ogm_packet->tt_num_changes)); |
c3e29312 ML |
1307 | |
1308 | kfree_skb(skb); | |
1309 | return NET_RX_SUCCESS; | |
fc957275 | 1310 | } |
1c280471 | 1311 | |
56303d34 | 1312 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 1313 | .name = "BATMAN_IV", |
fe8bc396 SE |
1314 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
1315 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
1316 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
1317 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
1318 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
1319 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
1c280471 ML |
1320 | }; |
1321 | ||
81c524f7 | 1322 | int __init batadv_iv_init(void) |
1c280471 | 1323 | { |
c3e29312 ML |
1324 | int ret; |
1325 | ||
1326 | /* batman originator packet */ | |
acd34afa SE |
1327 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
1328 | batadv_iv_ogm_receive); | |
c3e29312 ML |
1329 | if (ret < 0) |
1330 | goto out; | |
1331 | ||
fe8bc396 | 1332 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
1333 | if (ret < 0) |
1334 | goto handler_unregister; | |
1335 | ||
1336 | goto out; | |
1337 | ||
1338 | handler_unregister: | |
acd34afa | 1339 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
1340 | out: |
1341 | return ret; | |
1c280471 | 1342 | } |