Commit | Line | Data |
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0b873931 | 1 | /* Copyright (C) 2007-2013 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; |
14511519 | 60 | unsigned char *ogm_buff; |
d7d32ec0 | 61 | uint32_t random_seqno; |
5346c35e | 62 | int res = -ENOMEM; |
d7d32ec0 ML |
63 | |
64 | /* randomize initial seqno to avoid collision */ | |
65 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 66 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 67 | |
14511519 ML |
68 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
69 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
70 | if (!ogm_buff) | |
77af7575 ML |
71 | goto out; |
72 | ||
14511519 ML |
73 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
74 | ||
75 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
96412690 SE |
76 | batadv_ogm_packet->header.packet_type = BATADV_IV_OGM; |
77 | batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION; | |
78 | batadv_ogm_packet->header.ttl = 2; | |
79 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; | |
80 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; | |
81 | batadv_ogm_packet->tt_num_changes = 0; | |
82 | batadv_ogm_packet->ttvn = 0; | |
77af7575 ML |
83 | |
84 | res = 0; | |
85 | ||
86 | out: | |
87 | return res; | |
d0b9fd89 ML |
88 | } |
89 | ||
56303d34 | 90 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 91 | { |
14511519 ML |
92 | kfree(hard_iface->bat_iv.ogm_buff); |
93 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
94 | } |
95 | ||
56303d34 | 96 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 97 | { |
96412690 | 98 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 99 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 100 | |
14511519 | 101 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
96412690 | 102 | memcpy(batadv_ogm_packet->orig, |
c3229398 | 103 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
96412690 | 104 | memcpy(batadv_ogm_packet->prev_sender, |
c3229398 | 105 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
d0b9fd89 ML |
106 | } |
107 | ||
56303d34 SE |
108 | static void |
109 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 110 | { |
96412690 | 111 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 112 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 113 | |
14511519 | 114 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
96412690 SE |
115 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
116 | batadv_ogm_packet->header.ttl = BATADV_TTL; | |
d0b9fd89 ML |
117 | } |
118 | ||
b9dacc52 | 119 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 120 | static unsigned long |
56303d34 | 121 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 122 | { |
42d0b044 SE |
123 | unsigned int msecs; |
124 | ||
125 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 126 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
127 | |
128 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
129 | } |
130 | ||
131 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 132 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 133 | { |
e76e4320 | 134 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
135 | } |
136 | ||
137 | /* apply hop penalty for a normal link */ | |
56303d34 SE |
138 | static uint8_t batadv_hop_penalty(uint8_t tq, |
139 | const struct batadv_priv *bat_priv) | |
b9dacc52 ML |
140 | { |
141 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
142 | int new_tq; |
143 | ||
144 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
145 | new_tq /= BATADV_TQ_MAX_VALUE; | |
146 | ||
147 | return new_tq; | |
b9dacc52 ML |
148 | } |
149 | ||
fc957275 | 150 | /* is there another aggregated packet here? */ |
fe8bc396 SE |
151 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
152 | int tt_num_changes) | |
fc957275 | 153 | { |
08c36d3e SE |
154 | int next_buff_pos = 0; |
155 | ||
7e071c79 | 156 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
08c36d3e | 157 | next_buff_pos += batadv_tt_len(tt_num_changes); |
fc957275 ML |
158 | |
159 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 160 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
161 | } |
162 | ||
b9dacc52 | 163 | /* send a batman ogm to a given interface */ |
56303d34 SE |
164 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
165 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 166 | { |
56303d34 | 167 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
b9dacc52 ML |
168 | char *fwd_str; |
169 | uint8_t packet_num; | |
170 | int16_t buff_pos; | |
96412690 | 171 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 172 | struct sk_buff *skb; |
c67893d1 | 173 | uint8_t *packet_pos; |
b9dacc52 | 174 | |
e9a4f295 | 175 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
176 | return; |
177 | ||
178 | packet_num = 0; | |
179 | buff_pos = 0; | |
c67893d1 SE |
180 | packet_pos = forw_packet->skb->data; |
181 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
182 | |
183 | /* adjust all flags and log packets */ | |
fe8bc396 | 184 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
96412690 | 185 | batadv_ogm_packet->tt_num_changes)) { |
b9dacc52 | 186 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
187 | * ordinary base packet |
188 | */ | |
8de47de5 SE |
189 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
190 | forw_packet->if_incoming == hard_iface) | |
96412690 | 191 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 192 | else |
96412690 | 193 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 194 | |
c67893d1 SE |
195 | if (packet_num > 0 || !forw_packet->own) |
196 | fwd_str = "Forwarding"; | |
197 | else | |
198 | fwd_str = "Sending own"; | |
199 | ||
39c75a51 | 200 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
201 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n", |
202 | fwd_str, (packet_num > 0 ? "aggregated " : ""), | |
96412690 SE |
203 | batadv_ogm_packet->orig, |
204 | ntohl(batadv_ogm_packet->seqno), | |
205 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl, | |
206 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? | |
1eda58bf | 207 | "on" : "off"), |
96412690 | 208 | batadv_ogm_packet->ttvn, hard_iface->net_dev->name, |
1eda58bf | 209 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 210 | |
7e071c79 | 211 | buff_pos += BATADV_OGM_HLEN; |
96412690 | 212 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
b9dacc52 | 213 | packet_num++; |
c67893d1 SE |
214 | packet_pos = forw_packet->skb->data + buff_pos; |
215 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
216 | } |
217 | ||
218 | /* create clone because function is called more than once */ | |
219 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 220 | if (skb) { |
d69909d2 SE |
221 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
222 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 223 | skb->len + ETH_HLEN); |
3193e8fd | 224 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
f8214865 | 225 | } |
b9dacc52 ML |
226 | } |
227 | ||
228 | /* send a batman ogm packet */ | |
56303d34 | 229 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 230 | { |
56303d34 | 231 | struct batadv_hard_iface *hard_iface; |
b9dacc52 | 232 | struct net_device *soft_iface; |
56303d34 SE |
233 | struct batadv_priv *bat_priv; |
234 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 235 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 236 | unsigned char directlink; |
c67893d1 | 237 | uint8_t *packet_pos; |
b9dacc52 | 238 | |
c67893d1 SE |
239 | packet_pos = forw_packet->skb->data; |
240 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
96412690 | 241 | directlink = (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0); |
b9dacc52 ML |
242 | |
243 | if (!forw_packet->if_incoming) { | |
86ceb360 | 244 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
245 | goto out; |
246 | } | |
247 | ||
248 | soft_iface = forw_packet->if_incoming->soft_iface; | |
249 | bat_priv = netdev_priv(soft_iface); | |
250 | ||
e9a4f295 | 251 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
252 | goto out; |
253 | ||
e5d89254 | 254 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 ML |
255 | if (!primary_if) |
256 | goto out; | |
257 | ||
9cfc7bd6 SE |
258 | /* multihomed peer assumed |
259 | * non-primary OGMs are only broadcasted on their interface | |
260 | */ | |
96412690 | 261 | if ((directlink && (batadv_ogm_packet->header.ttl == 1)) || |
b9dacc52 | 262 | (forw_packet->own && (forw_packet->if_incoming != primary_if))) { |
b9dacc52 | 263 | /* FIXME: what about aggregated packets ? */ |
39c75a51 | 264 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
265 | "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n", |
266 | (forw_packet->own ? "Sending own" : "Forwarding"), | |
96412690 SE |
267 | batadv_ogm_packet->orig, |
268 | ntohl(batadv_ogm_packet->seqno), | |
269 | batadv_ogm_packet->header.ttl, | |
1eda58bf SE |
270 | forw_packet->if_incoming->net_dev->name, |
271 | forw_packet->if_incoming->net_dev->dev_addr); | |
b9dacc52 ML |
272 | |
273 | /* skb is only used once and than forw_packet is free'd */ | |
9455e34c SE |
274 | batadv_send_skb_packet(forw_packet->skb, |
275 | forw_packet->if_incoming, | |
3193e8fd | 276 | batadv_broadcast_addr); |
b9dacc52 ML |
277 | forw_packet->skb = NULL; |
278 | ||
279 | goto out; | |
280 | } | |
281 | ||
282 | /* broadcast on every interface */ | |
283 | rcu_read_lock(); | |
3193e8fd | 284 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
b9dacc52 ML |
285 | if (hard_iface->soft_iface != soft_iface) |
286 | continue; | |
287 | ||
fe8bc396 | 288 | batadv_iv_ogm_send_to_if(forw_packet, hard_iface); |
b9dacc52 ML |
289 | } |
290 | rcu_read_unlock(); | |
291 | ||
292 | out: | |
293 | if (primary_if) | |
e5d89254 | 294 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
295 | } |
296 | ||
297 | /* return true if new_packet can be aggregated with forw_packet */ | |
fe8bc396 | 298 | static bool |
96412690 | 299 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 300 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
301 | int packet_len, unsigned long send_time, |
302 | bool directlink, | |
56303d34 SE |
303 | const struct batadv_hard_iface *if_incoming, |
304 | const struct batadv_forw_packet *forw_packet) | |
b9dacc52 | 305 | { |
96412690 | 306 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 307 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 308 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 309 | bool res = false; |
42d0b044 | 310 | unsigned long aggregation_end_time; |
b9dacc52 | 311 | |
96412690 | 312 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
313 | aggregation_end_time = send_time; |
314 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 315 | |
9cfc7bd6 | 316 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
317 | * if: |
318 | * | |
319 | * - the send time is within our MAX_AGGREGATION_MS time | |
320 | * - the resulting packet wont be bigger than | |
321 | * MAX_AGGREGATION_BYTES | |
322 | */ | |
b9dacc52 | 323 | if (time_before(send_time, forw_packet->send_time) && |
42d0b044 SE |
324 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
325 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { | |
9cfc7bd6 | 326 | /* check aggregation compatibility |
b9dacc52 ML |
327 | * -> direct link packets are broadcasted on |
328 | * their interface only | |
329 | * -> aggregate packet if the current packet is | |
330 | * a "global" packet as well as the base | |
331 | * packet | |
332 | */ | |
e5d89254 | 333 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 ML |
334 | if (!primary_if) |
335 | goto out; | |
336 | ||
337 | /* packets without direct link flag and high TTL | |
9cfc7bd6 SE |
338 | * are flooded through the net |
339 | */ | |
b9dacc52 | 340 | if ((!directlink) && |
96412690 SE |
341 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
342 | (batadv_ogm_packet->header.ttl != 1) && | |
b9dacc52 ML |
343 | |
344 | /* own packets originating non-primary | |
9cfc7bd6 SE |
345 | * interfaces leave only that interface |
346 | */ | |
b9dacc52 ML |
347 | ((!forw_packet->own) || |
348 | (forw_packet->if_incoming == primary_if))) { | |
349 | res = true; | |
350 | goto out; | |
351 | } | |
352 | ||
353 | /* if the incoming packet is sent via this one | |
9cfc7bd6 SE |
354 | * interface only - we still can aggregate |
355 | */ | |
b9dacc52 | 356 | if ((directlink) && |
fe8bc396 | 357 | (new_bat_ogm_packet->header.ttl == 1) && |
b9dacc52 ML |
358 | (forw_packet->if_incoming == if_incoming) && |
359 | ||
360 | /* packets from direct neighbors or | |
361 | * own secondary interface packets | |
9cfc7bd6 SE |
362 | * (= secondary interface packets in general) |
363 | */ | |
96412690 | 364 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
b9dacc52 ML |
365 | (forw_packet->own && |
366 | forw_packet->if_incoming != primary_if))) { | |
367 | res = true; | |
368 | goto out; | |
369 | } | |
370 | } | |
371 | ||
372 | out: | |
373 | if (primary_if) | |
e5d89254 | 374 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
375 | return res; |
376 | } | |
377 | ||
378 | /* create a new aggregated packet and add this packet to it */ | |
fe8bc396 SE |
379 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
380 | int packet_len, unsigned long send_time, | |
381 | bool direct_link, | |
56303d34 | 382 | struct batadv_hard_iface *if_incoming, |
fe8bc396 | 383 | int own_packet) |
b9dacc52 | 384 | { |
56303d34 SE |
385 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
386 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 387 | unsigned char *skb_buff; |
42d0b044 | 388 | unsigned int skb_size; |
b9dacc52 ML |
389 | |
390 | if (!atomic_inc_not_zero(&if_incoming->refcount)) | |
391 | return; | |
392 | ||
393 | /* own packet should always be scheduled */ | |
394 | if (!own_packet) { | |
3e34819e | 395 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 396 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 397 | "batman packet queue full\n"); |
b9dacc52 ML |
398 | goto out; |
399 | } | |
400 | } | |
401 | ||
402 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
403 | if (!forw_packet_aggr) { | |
404 | if (!own_packet) | |
405 | atomic_inc(&bat_priv->batman_queue_left); | |
406 | goto out; | |
407 | } | |
408 | ||
409 | if ((atomic_read(&bat_priv->aggregated_ogms)) && | |
42d0b044 | 410 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
5b246574 | 411 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 412 | else |
5b246574 SE |
413 | skb_size = packet_len; |
414 | ||
415 | skb_size += ETH_HLEN + NET_IP_ALIGN; | |
b9dacc52 | 416 | |
42d0b044 | 417 | forw_packet_aggr->skb = dev_alloc_skb(skb_size); |
b9dacc52 ML |
418 | if (!forw_packet_aggr->skb) { |
419 | if (!own_packet) | |
420 | atomic_inc(&bat_priv->batman_queue_left); | |
421 | kfree(forw_packet_aggr); | |
422 | goto out; | |
423 | } | |
5b246574 | 424 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN + NET_IP_ALIGN); |
b9dacc52 ML |
425 | |
426 | INIT_HLIST_NODE(&forw_packet_aggr->list); | |
427 | ||
428 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
429 | forw_packet_aggr->packet_len = packet_len; | |
430 | memcpy(skb_buff, packet_buff, packet_len); | |
431 | ||
432 | forw_packet_aggr->own = own_packet; | |
433 | forw_packet_aggr->if_incoming = if_incoming; | |
434 | forw_packet_aggr->num_packets = 0; | |
42d0b044 | 435 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
436 | forw_packet_aggr->send_time = send_time; |
437 | ||
438 | /* save packet direct link flag status */ | |
439 | if (direct_link) | |
440 | forw_packet_aggr->direct_link_flags |= 1; | |
441 | ||
442 | /* add new packet to packet list */ | |
443 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
444 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
445 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
446 | ||
447 | /* start timer for this packet */ | |
448 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 449 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 450 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
451 | &forw_packet_aggr->delayed_work, |
452 | send_time - jiffies); | |
453 | ||
454 | return; | |
455 | out: | |
e5d89254 | 456 | batadv_hardif_free_ref(if_incoming); |
b9dacc52 ML |
457 | } |
458 | ||
459 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 460 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
461 | const unsigned char *packet_buff, |
462 | int packet_len, bool direct_link) | |
b9dacc52 ML |
463 | { |
464 | unsigned char *skb_buff; | |
8de47de5 | 465 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
466 | |
467 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
468 | memcpy(skb_buff, packet_buff, packet_len); | |
469 | forw_packet_aggr->packet_len += packet_len; | |
470 | forw_packet_aggr->num_packets++; | |
471 | ||
472 | /* save packet direct link flag status */ | |
8de47de5 SE |
473 | if (direct_link) { |
474 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
475 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
476 | } | |
b9dacc52 ML |
477 | } |
478 | ||
56303d34 | 479 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
480 | unsigned char *packet_buff, |
481 | int packet_len, | |
56303d34 | 482 | struct batadv_hard_iface *if_incoming, |
fe8bc396 | 483 | int own_packet, unsigned long send_time) |
b9dacc52 | 484 | { |
9cfc7bd6 | 485 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
486 | * _pos -> pointer to the position in the queue |
487 | */ | |
56303d34 SE |
488 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
489 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 490 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 491 | bool direct_link; |
42d0b044 | 492 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 493 | |
96412690 SE |
494 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
495 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; | |
42d0b044 | 496 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
497 | |
498 | /* find position for the packet in the forward queue */ | |
499 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
500 | /* own packets are not to be aggregated */ | |
501 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { | |
b67bfe0d | 502 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 503 | &bat_priv->forw_bat_list, list) { |
96412690 | 504 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
505 | bat_priv, packet_len, |
506 | send_time, direct_link, | |
507 | if_incoming, | |
508 | forw_packet_pos)) { | |
b9dacc52 ML |
509 | forw_packet_aggr = forw_packet_pos; |
510 | break; | |
511 | } | |
512 | } | |
513 | } | |
514 | ||
515 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
516 | * suitable aggregation packet found |
517 | */ | |
b9dacc52 ML |
518 | if (!forw_packet_aggr) { |
519 | /* the following section can run without the lock */ | |
520 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
521 | ||
9cfc7bd6 | 522 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
523 | * we hold it back for a while, so that it might be aggregated |
524 | * later on | |
525 | */ | |
42d0b044 SE |
526 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
527 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 528 | |
fe8bc396 SE |
529 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
530 | send_time, direct_link, | |
531 | if_incoming, own_packet); | |
b9dacc52 | 532 | } else { |
fe8bc396 SE |
533 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
534 | packet_len, direct_link); | |
b9dacc52 ML |
535 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
536 | } | |
537 | } | |
538 | ||
56303d34 | 539 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 540 | const struct ethhdr *ethhdr, |
96412690 | 541 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
542 | bool is_single_hop_neigh, |
543 | bool is_from_best_next_hop, | |
56303d34 | 544 | struct batadv_hard_iface *if_incoming) |
b9dacc52 | 545 | { |
56303d34 | 546 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
b9dacc52 ML |
547 | uint8_t tt_num_changes; |
548 | ||
96412690 | 549 | if (batadv_ogm_packet->header.ttl <= 1) { |
39c75a51 | 550 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
551 | return; |
552 | } | |
553 | ||
13b2541b ML |
554 | if (!is_from_best_next_hop) { |
555 | /* Mark the forwarded packet when it is not coming from our | |
556 | * best next hop. We still need to forward the packet for our | |
557 | * neighbor link quality detection to work in case the packet | |
558 | * originated from a single hop neighbor. Otherwise we can | |
559 | * simply drop the ogm. | |
560 | */ | |
561 | if (is_single_hop_neigh) | |
96412690 | 562 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
563 | else |
564 | return; | |
565 | } | |
b9dacc52 | 566 | |
96412690 | 567 | tt_num_changes = batadv_ogm_packet->tt_num_changes; |
b9dacc52 | 568 | |
96412690 SE |
569 | batadv_ogm_packet->header.ttl--; |
570 | memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); | |
b9dacc52 | 571 | |
b9dacc52 | 572 | /* apply hop penalty */ |
96412690 | 573 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 574 | bat_priv); |
b9dacc52 | 575 | |
39c75a51 | 576 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 577 | "Forwarding packet: tq: %i, ttl: %i\n", |
96412690 | 578 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl); |
b9dacc52 | 579 | |
b9dacc52 | 580 | /* switch of primaries first hop flag when forwarding */ |
96412690 | 581 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
75cd33f8 | 582 | if (is_single_hop_neigh) |
96412690 | 583 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 584 | else |
96412690 | 585 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 586 | |
96412690 | 587 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
7e071c79 | 588 | BATADV_OGM_HLEN + batadv_tt_len(tt_num_changes), |
fe8bc396 | 589 | if_incoming, 0, batadv_iv_ogm_fwd_send_time()); |
b9dacc52 ML |
590 | } |
591 | ||
56303d34 | 592 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 593 | { |
56303d34 | 594 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 595 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 596 | struct batadv_ogm_packet *batadv_ogm_packet; |
56303d34 | 597 | struct batadv_hard_iface *primary_if; |
14511519 | 598 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
be9aa4c1 | 599 | int vis_server, tt_num_changes = 0; |
bbb1f90e SE |
600 | uint32_t seqno; |
601 | uint8_t bandwidth; | |
b9dacc52 ML |
602 | |
603 | vis_server = atomic_read(&bat_priv->vis_mode); | |
e5d89254 | 604 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 605 | |
be9aa4c1 | 606 | if (hard_iface == primary_if) |
14511519 ML |
607 | tt_num_changes = batadv_tt_append_diff(bat_priv, ogm_buff, |
608 | ogm_buff_len, | |
7e071c79 | 609 | BATADV_OGM_HLEN); |
be9aa4c1 | 610 | |
14511519 | 611 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
b9dacc52 ML |
612 | |
613 | /* change sequence number to network order */ | |
14511519 | 614 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 615 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 616 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 617 | |
807736f6 SE |
618 | batadv_ogm_packet->ttvn = atomic_read(&bat_priv->tt.vn); |
619 | batadv_ogm_packet->tt_crc = htons(bat_priv->tt.local_crc); | |
b9dacc52 | 620 | if (tt_num_changes >= 0) |
96412690 | 621 | batadv_ogm_packet->tt_num_changes = tt_num_changes; |
b9dacc52 | 622 | |
acd34afa | 623 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC) |
96412690 | 624 | batadv_ogm_packet->flags |= BATADV_VIS_SERVER; |
b9dacc52 | 625 | else |
96412690 | 626 | batadv_ogm_packet->flags &= ~BATADV_VIS_SERVER; |
b9dacc52 | 627 | |
bbb1f90e SE |
628 | if (hard_iface == primary_if && |
629 | atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_SERVER) { | |
630 | bandwidth = (uint8_t)atomic_read(&bat_priv->gw_bandwidth); | |
631 | batadv_ogm_packet->gw_flags = bandwidth; | |
632 | } else { | |
96412690 | 633 | batadv_ogm_packet->gw_flags = BATADV_NO_FLAGS; |
bbb1f90e | 634 | } |
b9dacc52 | 635 | |
30d3c511 | 636 | batadv_slide_own_bcast_window(hard_iface); |
14511519 ML |
637 | batadv_iv_ogm_queue_add(bat_priv, hard_iface->bat_iv.ogm_buff, |
638 | hard_iface->bat_iv.ogm_buff_len, hard_iface, 1, | |
fe8bc396 | 639 | batadv_iv_ogm_emit_send_time(bat_priv)); |
b9dacc52 ML |
640 | |
641 | if (primary_if) | |
e5d89254 | 642 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
643 | } |
644 | ||
fe8bc396 | 645 | static void |
56303d34 SE |
646 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
647 | struct batadv_orig_node *orig_node, | |
fe8bc396 | 648 | const struct ethhdr *ethhdr, |
96412690 | 649 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 650 | struct batadv_hard_iface *if_incoming, |
fe8bc396 SE |
651 | const unsigned char *tt_buff, |
652 | int is_duplicate) | |
fc957275 | 653 | { |
56303d34 SE |
654 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
655 | struct batadv_neigh_node *router = NULL; | |
656 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 657 | int if_num; |
bbb1f90e | 658 | uint8_t sum_orig, sum_neigh; |
1eda58bf | 659 | uint8_t *neigh_addr; |
bbb1f90e | 660 | uint8_t tq_avg; |
fc957275 | 661 | |
39c75a51 | 662 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 663 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
664 | |
665 | rcu_read_lock(); | |
b67bfe0d | 666 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 667 | &orig_node->neigh_list, list) { |
1eda58bf SE |
668 | neigh_addr = tmp_neigh_node->addr; |
669 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
670 | tmp_neigh_node->if_incoming == if_incoming && | |
671 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { | |
fc957275 | 672 | if (neigh_node) |
7d211efc | 673 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
674 | neigh_node = tmp_neigh_node; |
675 | continue; | |
676 | } | |
677 | ||
678 | if (is_duplicate) | |
679 | continue; | |
680 | ||
e3b0d0de | 681 | spin_lock_bh(&tmp_neigh_node->lq_update_lock); |
925a6672 SE |
682 | batadv_ring_buffer_set(tmp_neigh_node->tq_recv, |
683 | &tmp_neigh_node->tq_index, 0); | |
bbb1f90e SE |
684 | tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->tq_recv); |
685 | tmp_neigh_node->tq_avg = tq_avg; | |
e3b0d0de | 686 | spin_unlock_bh(&tmp_neigh_node->lq_update_lock); |
fc957275 ML |
687 | } |
688 | ||
689 | if (!neigh_node) { | |
56303d34 | 690 | struct batadv_orig_node *orig_tmp; |
fc957275 | 691 | |
7d211efc | 692 | orig_tmp = batadv_get_orig_node(bat_priv, ethhdr->h_source); |
fc957275 ML |
693 | if (!orig_tmp) |
694 | goto unlock; | |
695 | ||
fe8bc396 SE |
696 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
697 | ethhdr->h_source, | |
698 | orig_node, orig_tmp, | |
96412690 | 699 | batadv_ogm_packet->seqno); |
fc957275 | 700 | |
7d211efc | 701 | batadv_orig_node_free_ref(orig_tmp); |
fc957275 ML |
702 | if (!neigh_node) |
703 | goto unlock; | |
704 | } else | |
39c75a51 | 705 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 706 | "Updating existing last-hop neighbor of originator\n"); |
fc957275 ML |
707 | |
708 | rcu_read_unlock(); | |
709 | ||
96412690 | 710 | orig_node->flags = batadv_ogm_packet->flags; |
d7b2a97e | 711 | neigh_node->last_seen = jiffies; |
fc957275 | 712 | |
e3b0d0de | 713 | spin_lock_bh(&neigh_node->lq_update_lock); |
925a6672 SE |
714 | batadv_ring_buffer_set(neigh_node->tq_recv, |
715 | &neigh_node->tq_index, | |
96412690 | 716 | batadv_ogm_packet->tq); |
925a6672 | 717 | neigh_node->tq_avg = batadv_ring_buffer_avg(neigh_node->tq_recv); |
e3b0d0de | 718 | spin_unlock_bh(&neigh_node->lq_update_lock); |
fc957275 ML |
719 | |
720 | if (!is_duplicate) { | |
96412690 SE |
721 | orig_node->last_ttl = batadv_ogm_packet->header.ttl; |
722 | neigh_node->last_ttl = batadv_ogm_packet->header.ttl; | |
fc957275 ML |
723 | } |
724 | ||
30d3c511 | 725 | batadv_bonding_candidate_add(orig_node, neigh_node); |
fc957275 ML |
726 | |
727 | /* if this neighbor already is our next hop there is nothing | |
9cfc7bd6 SE |
728 | * to change |
729 | */ | |
7d211efc | 730 | router = batadv_orig_node_get_router(orig_node); |
fc957275 ML |
731 | if (router == neigh_node) |
732 | goto update_tt; | |
733 | ||
734 | /* if this neighbor does not offer a better TQ we won't consider it */ | |
735 | if (router && (router->tq_avg > neigh_node->tq_avg)) | |
736 | goto update_tt; | |
737 | ||
738 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
739 | * won't consider it either |
740 | */ | |
fc957275 ML |
741 | if (router && (neigh_node->tq_avg == router->tq_avg)) { |
742 | orig_node_tmp = router->orig_node; | |
743 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); | |
7caf69fb LL |
744 | if_num = router->if_incoming->if_num; |
745 | sum_orig = orig_node_tmp->bcast_own_sum[if_num]; | |
fc957275 ML |
746 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
747 | ||
748 | orig_node_tmp = neigh_node->orig_node; | |
749 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); | |
7caf69fb LL |
750 | if_num = neigh_node->if_incoming->if_num; |
751 | sum_neigh = orig_node_tmp->bcast_own_sum[if_num]; | |
fc957275 ML |
752 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
753 | ||
bbb1f90e | 754 | if (sum_orig >= sum_neigh) |
fc957275 ML |
755 | goto update_tt; |
756 | } | |
757 | ||
30d3c511 | 758 | batadv_update_route(bat_priv, orig_node, neigh_node); |
fc957275 ML |
759 | |
760 | update_tt: | |
761 | /* I have to check for transtable changes only if the OGM has been | |
9cfc7bd6 SE |
762 | * sent through a primary interface |
763 | */ | |
96412690 SE |
764 | if (((batadv_ogm_packet->orig != ethhdr->h_source) && |
765 | (batadv_ogm_packet->header.ttl > 2)) || | |
766 | (batadv_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP)) | |
08c36d3e | 767 | batadv_tt_update_orig(bat_priv, orig_node, tt_buff, |
96412690 SE |
768 | batadv_ogm_packet->tt_num_changes, |
769 | batadv_ogm_packet->ttvn, | |
770 | ntohs(batadv_ogm_packet->tt_crc)); | |
fc957275 | 771 | |
96412690 | 772 | if (orig_node->gw_flags != batadv_ogm_packet->gw_flags) |
7cf06bc6 | 773 | batadv_gw_node_update(bat_priv, orig_node, |
96412690 | 774 | batadv_ogm_packet->gw_flags); |
fc957275 | 775 | |
96412690 | 776 | orig_node->gw_flags = batadv_ogm_packet->gw_flags; |
fc957275 ML |
777 | |
778 | /* restart gateway selection if fast or late switching was enabled */ | |
779 | if ((orig_node->gw_flags) && | |
cd646ab1 | 780 | (atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_CLIENT) && |
fc957275 | 781 | (atomic_read(&bat_priv->gw_sel_class) > 2)) |
7cf06bc6 | 782 | batadv_gw_check_election(bat_priv, orig_node); |
fc957275 ML |
783 | |
784 | goto out; | |
785 | ||
786 | unlock: | |
787 | rcu_read_unlock(); | |
788 | out: | |
789 | if (neigh_node) | |
7d211efc | 790 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 | 791 | if (router) |
7d211efc | 792 | batadv_neigh_node_free_ref(router); |
fc957275 ML |
793 | } |
794 | ||
56303d34 SE |
795 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
796 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 797 | struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 798 | struct batadv_hard_iface *if_incoming) |
fc957275 | 799 | { |
56303d34 SE |
800 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
801 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
fc957275 | 802 | uint8_t total_count; |
42d0b044 SE |
803 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
804 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; | |
805 | int tq_asym_penalty, inv_asym_penalty, ret = 0; | |
806 | unsigned int combined_tq; | |
fc957275 ML |
807 | |
808 | /* find corresponding one hop neighbor */ | |
809 | rcu_read_lock(); | |
b67bfe0d | 810 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 811 | &orig_neigh_node->neigh_list, list) { |
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 | int is_duplicate = 0; |
921 | int32_t seq_diff; | |
922 | int need_update = 0; | |
923 | int set_mark, ret = -1; | |
96412690 | 924 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
1eda58bf | 925 | uint8_t *neigh_addr; |
bbb1f90e | 926 | uint8_t packet_count; |
fc957275 | 927 | |
96412690 | 928 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
fc957275 ML |
929 | if (!orig_node) |
930 | return 0; | |
931 | ||
932 | spin_lock_bh(&orig_node->ogm_cnt_lock); | |
e0f5211f | 933 | seq_diff = seqno - orig_node->last_real_seqno; |
fc957275 ML |
934 | |
935 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 936 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 SE |
937 | batadv_window_protected(bat_priv, seq_diff, |
938 | &orig_node->batman_seqno_reset)) | |
fc957275 ML |
939 | goto out; |
940 | ||
941 | rcu_read_lock(); | |
b67bfe0d | 942 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 943 | &orig_node->neigh_list, list) { |
9b4a1159 SE |
944 | is_duplicate |= batadv_test_bit(tmp_neigh_node->real_bits, |
945 | orig_node->last_real_seqno, | |
946 | seqno); | |
fc957275 | 947 | |
1eda58bf SE |
948 | neigh_addr = tmp_neigh_node->addr; |
949 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
950 | tmp_neigh_node->if_incoming == if_incoming) | |
fc957275 ML |
951 | set_mark = 1; |
952 | else | |
953 | set_mark = 0; | |
954 | ||
955 | /* if the window moved, set the update flag. */ | |
0f5f9322 SE |
956 | need_update |= batadv_bit_get_packet(bat_priv, |
957 | tmp_neigh_node->real_bits, | |
958 | seq_diff, set_mark); | |
fc957275 | 959 | |
bbb1f90e SE |
960 | packet_count = bitmap_weight(tmp_neigh_node->real_bits, |
961 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
962 | tmp_neigh_node->real_packet_count = packet_count; | |
fc957275 ML |
963 | } |
964 | rcu_read_unlock(); | |
965 | ||
966 | if (need_update) { | |
39c75a51 | 967 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
968 | "updating last_seqno: old %u, new %u\n", |
969 | orig_node->last_real_seqno, seqno); | |
e0f5211f | 970 | orig_node->last_real_seqno = seqno; |
fc957275 ML |
971 | } |
972 | ||
973 | ret = is_duplicate; | |
974 | ||
975 | out: | |
976 | spin_unlock_bh(&orig_node->ogm_cnt_lock); | |
7d211efc | 977 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
978 | return ret; |
979 | } | |
980 | ||
fe8bc396 | 981 | static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, |
96412690 | 982 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 | 983 | const unsigned char *tt_buff, |
56303d34 | 984 | struct batadv_hard_iface *if_incoming) |
fc957275 | 985 | { |
56303d34 SE |
986 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
987 | struct batadv_hard_iface *hard_iface; | |
988 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
989 | struct batadv_neigh_node *router = NULL, *router_router = NULL; | |
990 | struct batadv_neigh_node *orig_neigh_router = NULL; | |
fc957275 ML |
991 | int has_directlink_flag; |
992 | int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; | |
fe8bc396 | 993 | int is_broadcast = 0, is_bidirect; |
75cd33f8 | 994 | bool is_single_hop_neigh = false; |
13b2541b | 995 | bool is_from_best_next_hop = false; |
fe8bc396 | 996 | int is_duplicate, sameseq, simlar_ttl; |
fc957275 | 997 | uint32_t if_incoming_seqno; |
1eda58bf | 998 | uint8_t *prev_sender; |
fc957275 ML |
999 | |
1000 | /* Silently drop when the batman packet is actually not a | |
1001 | * correct packet. | |
1002 | * | |
1003 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1004 | * minimum frame length of 64 byte) and the aggregation interprets | |
1005 | * it as an additional length. | |
1006 | * | |
1007 | * TODO: A more sane solution would be to have a bit in the | |
96412690 | 1008 | * batadv_ogm_packet to detect whether the packet is the last |
fc957275 ML |
1009 | * packet in an aggregation. Here we expect that the padding |
1010 | * is always zero (or not 0x01) | |
1011 | */ | |
96412690 | 1012 | if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM) |
fc957275 ML |
1013 | return; |
1014 | ||
1015 | /* could be changed by schedule_own_packet() */ | |
14511519 | 1016 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); |
fc957275 | 1017 | |
96412690 | 1018 | if (batadv_ogm_packet->flags & BATADV_DIRECTLINK) |
acd34afa SE |
1019 | has_directlink_flag = 1; |
1020 | else | |
1021 | has_directlink_flag = 0; | |
fc957275 | 1022 | |
96412690 | 1023 | if (batadv_compare_eth(ethhdr->h_source, batadv_ogm_packet->orig)) |
75cd33f8 | 1024 | is_single_hop_neigh = true; |
fc957275 | 1025 | |
39c75a51 | 1026 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0275e24 | 1027 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %#.4x, changes %u, tq %d, TTL %d, V %d, IDF %d)\n", |
1eda58bf | 1028 | ethhdr->h_source, if_incoming->net_dev->name, |
96412690 SE |
1029 | if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig, |
1030 | batadv_ogm_packet->prev_sender, | |
1031 | ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->ttvn, | |
1032 | ntohs(batadv_ogm_packet->tt_crc), | |
1033 | batadv_ogm_packet->tt_num_changes, batadv_ogm_packet->tq, | |
1034 | batadv_ogm_packet->header.ttl, | |
1035 | batadv_ogm_packet->header.version, has_directlink_flag); | |
fc957275 ML |
1036 | |
1037 | rcu_read_lock(); | |
3193e8fd | 1038 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 | 1039 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
fc957275 ML |
1040 | continue; |
1041 | ||
1042 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1043 | continue; | |
1044 | ||
1eda58bf SE |
1045 | if (batadv_compare_eth(ethhdr->h_source, |
1046 | hard_iface->net_dev->dev_addr)) | |
fc957275 ML |
1047 | is_my_addr = 1; |
1048 | ||
96412690 | 1049 | if (batadv_compare_eth(batadv_ogm_packet->orig, |
1eda58bf | 1050 | hard_iface->net_dev->dev_addr)) |
fc957275 ML |
1051 | is_my_orig = 1; |
1052 | ||
96412690 | 1053 | if (batadv_compare_eth(batadv_ogm_packet->prev_sender, |
1eda58bf | 1054 | hard_iface->net_dev->dev_addr)) |
fc957275 ML |
1055 | is_my_oldorig = 1; |
1056 | ||
1057 | if (is_broadcast_ether_addr(ethhdr->h_source)) | |
1058 | is_broadcast = 1; | |
1059 | } | |
1060 | rcu_read_unlock(); | |
1061 | ||
96412690 | 1062 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
39c75a51 | 1063 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1064 | "Drop packet: incompatible batman version (%i)\n", |
96412690 | 1065 | batadv_ogm_packet->header.version); |
fc957275 ML |
1066 | return; |
1067 | } | |
1068 | ||
1069 | if (is_my_addr) { | |
39c75a51 | 1070 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1071 | "Drop packet: received my own broadcast (sender: %pM)\n", |
1072 | ethhdr->h_source); | |
fc957275 ML |
1073 | return; |
1074 | } | |
1075 | ||
1076 | if (is_broadcast) { | |
39c75a51 | 1077 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1078 | "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n", |
1079 | ethhdr->h_source); | |
fc957275 ML |
1080 | return; |
1081 | } | |
1082 | ||
1083 | if (is_my_orig) { | |
1084 | unsigned long *word; | |
1085 | int offset; | |
9b4a1159 | 1086 | int32_t bit_pos; |
42d0b044 SE |
1087 | int16_t if_num; |
1088 | uint8_t *weight; | |
fc957275 | 1089 | |
7d211efc SE |
1090 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
1091 | ethhdr->h_source); | |
fc957275 ML |
1092 | if (!orig_neigh_node) |
1093 | return; | |
1094 | ||
1095 | /* neighbor has to indicate direct link and it has to | |
9cfc7bd6 SE |
1096 | * come via the corresponding interface |
1097 | * save packet seqno for bidirectional check | |
1098 | */ | |
fc957275 | 1099 | if (has_directlink_flag && |
1eda58bf | 1100 | batadv_compare_eth(if_incoming->net_dev->dev_addr, |
96412690 | 1101 | batadv_ogm_packet->orig)) { |
42d0b044 SE |
1102 | if_num = if_incoming->if_num; |
1103 | offset = if_num * BATADV_NUM_WORDS; | |
fc957275 ML |
1104 | |
1105 | spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); | |
1106 | word = &(orig_neigh_node->bcast_own[offset]); | |
9b4a1159 | 1107 | bit_pos = if_incoming_seqno - 2; |
96412690 | 1108 | bit_pos -= ntohl(batadv_ogm_packet->seqno); |
9b4a1159 | 1109 | batadv_set_bit(word, bit_pos); |
42d0b044 SE |
1110 | weight = &orig_neigh_node->bcast_own_sum[if_num]; |
1111 | *weight = bitmap_weight(word, | |
1112 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
fc957275 ML |
1113 | spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); |
1114 | } | |
1115 | ||
39c75a51 | 1116 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1117 | "Drop packet: originator packet from myself (via neighbor)\n"); |
7d211efc | 1118 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 ML |
1119 | return; |
1120 | } | |
1121 | ||
1122 | if (is_my_oldorig) { | |
39c75a51 | 1123 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1124 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", |
1125 | ethhdr->h_source); | |
fc957275 ML |
1126 | return; |
1127 | } | |
1128 | ||
96412690 | 1129 | if (batadv_ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { |
39c75a51 | 1130 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1131 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", |
1132 | ethhdr->h_source); | |
13b2541b ML |
1133 | return; |
1134 | } | |
1135 | ||
96412690 | 1136 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
fc957275 ML |
1137 | if (!orig_node) |
1138 | return; | |
1139 | ||
96412690 | 1140 | is_duplicate = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, |
fe8bc396 | 1141 | if_incoming); |
fc957275 ML |
1142 | |
1143 | if (is_duplicate == -1) { | |
39c75a51 | 1144 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1145 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1146 | ethhdr->h_source); | |
fc957275 ML |
1147 | goto out; |
1148 | } | |
1149 | ||
96412690 | 1150 | if (batadv_ogm_packet->tq == 0) { |
39c75a51 | 1151 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1152 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1153 | goto out; |
1154 | } | |
1155 | ||
7d211efc | 1156 | router = batadv_orig_node_get_router(orig_node); |
fc957275 | 1157 | if (router) |
7d211efc | 1158 | router_router = batadv_orig_node_get_router(router->orig_node); |
fc957275 | 1159 | |
13b2541b | 1160 | if ((router && router->tq_avg != 0) && |
1eda58bf | 1161 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1162 | is_from_best_next_hop = true; |
1163 | ||
96412690 | 1164 | prev_sender = batadv_ogm_packet->prev_sender; |
fc957275 ML |
1165 | /* avoid temporary routing loops */ |
1166 | if (router && router_router && | |
1eda58bf | 1167 | (batadv_compare_eth(router->addr, prev_sender)) && |
96412690 | 1168 | !(batadv_compare_eth(batadv_ogm_packet->orig, prev_sender)) && |
1eda58bf | 1169 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1170 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1171 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1172 | ethhdr->h_source); | |
fc957275 ML |
1173 | goto out; |
1174 | } | |
1175 | ||
1176 | /* if sender is a direct neighbor the sender mac equals | |
9cfc7bd6 SE |
1177 | * originator mac |
1178 | */ | |
c67893d1 SE |
1179 | if (is_single_hop_neigh) |
1180 | orig_neigh_node = orig_node; | |
1181 | else | |
1182 | orig_neigh_node = batadv_get_orig_node(bat_priv, | |
1183 | ethhdr->h_source); | |
1184 | ||
fc957275 ML |
1185 | if (!orig_neigh_node) |
1186 | goto out; | |
1187 | ||
7d211efc | 1188 | orig_neigh_router = batadv_orig_node_get_router(orig_neigh_node); |
fc957275 ML |
1189 | |
1190 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1191 | * don't route towards it |
1192 | */ | |
fc957275 | 1193 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1194 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1195 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1196 | goto out_neigh; |
1197 | } | |
1198 | ||
fe8bc396 | 1199 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
96412690 | 1200 | batadv_ogm_packet, if_incoming); |
fc957275 | 1201 | |
30d3c511 | 1202 | batadv_bonding_save_primary(orig_node, orig_neigh_node, |
96412690 | 1203 | batadv_ogm_packet); |
fc957275 ML |
1204 | |
1205 | /* update ranking if it is not a duplicate or has the same | |
9cfc7bd6 SE |
1206 | * seqno and similar ttl as the non-duplicate |
1207 | */ | |
96412690 SE |
1208 | sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno); |
1209 | simlar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl; | |
fe8bc396 SE |
1210 | if (is_bidirect && (!is_duplicate || (sameseq && simlar_ttl))) |
1211 | batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, | |
96412690 | 1212 | batadv_ogm_packet, if_incoming, |
fe8bc396 | 1213 | tt_buff, is_duplicate); |
fc957275 ML |
1214 | |
1215 | /* is single hop (direct) neighbor */ | |
1216 | if (is_single_hop_neigh) { | |
fc957275 | 1217 | /* mark direct link on incoming interface */ |
96412690 | 1218 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
fe8bc396 SE |
1219 | is_single_hop_neigh, |
1220 | is_from_best_next_hop, if_incoming); | |
fc957275 | 1221 | |
39c75a51 | 1222 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1223 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1224 | goto out_neigh; |
1225 | } | |
1226 | ||
1227 | /* multihop originator */ | |
fe8bc396 | 1228 | if (!is_bidirect) { |
39c75a51 | 1229 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1230 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1231 | goto out_neigh; |
1232 | } | |
1233 | ||
1234 | if (is_duplicate) { | |
39c75a51 | 1235 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1236 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1237 | goto out_neigh; |
1238 | } | |
1239 | ||
39c75a51 | 1240 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1241 | "Forwarding packet: rebroadcast originator packet\n"); |
96412690 | 1242 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
fe8bc396 SE |
1243 | is_single_hop_neigh, is_from_best_next_hop, |
1244 | if_incoming); | |
fc957275 ML |
1245 | |
1246 | out_neigh: | |
1247 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
7d211efc | 1248 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 ML |
1249 | out: |
1250 | if (router) | |
7d211efc | 1251 | batadv_neigh_node_free_ref(router); |
fc957275 | 1252 | if (router_router) |
7d211efc | 1253 | batadv_neigh_node_free_ref(router_router); |
fc957275 | 1254 | if (orig_neigh_router) |
7d211efc | 1255 | batadv_neigh_node_free_ref(orig_neigh_router); |
fc957275 | 1256 | |
7d211efc | 1257 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
1258 | } |
1259 | ||
fe8bc396 | 1260 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1261 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1262 | { |
56303d34 | 1263 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
96412690 | 1264 | struct batadv_ogm_packet *batadv_ogm_packet; |
8780dad9 ML |
1265 | struct ethhdr *ethhdr; |
1266 | int buff_pos = 0, packet_len; | |
1267 | unsigned char *tt_buff, *packet_buff; | |
c3e29312 | 1268 | bool ret; |
c67893d1 | 1269 | uint8_t *packet_pos; |
c3e29312 | 1270 | |
7e071c79 | 1271 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1272 | if (!ret) |
1273 | return NET_RX_DROP; | |
fc957275 | 1274 | |
edbf12ba ML |
1275 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1276 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1277 | */ | |
fe8bc396 | 1278 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1279 | return NET_RX_DROP; |
1280 | ||
d69909d2 SE |
1281 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1282 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1283 | skb->len + ETH_HLEN); |
1284 | ||
8780dad9 ML |
1285 | packet_len = skb_headlen(skb); |
1286 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
1287 | packet_buff = skb->data; | |
96412690 | 1288 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
fc957275 ML |
1289 | |
1290 | /* unpack the aggregated packets and process them one by one */ | |
b47506d9 ML |
1291 | while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len, |
1292 | batadv_ogm_packet->tt_num_changes)) { | |
7e071c79 | 1293 | tt_buff = packet_buff + buff_pos + BATADV_OGM_HLEN; |
fc957275 | 1294 | |
96412690 | 1295 | batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, tt_buff, |
fe8bc396 | 1296 | if_incoming); |
fc957275 | 1297 | |
7e071c79 | 1298 | buff_pos += BATADV_OGM_HLEN; |
96412690 | 1299 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
fc957275 | 1300 | |
c67893d1 SE |
1301 | packet_pos = packet_buff + buff_pos; |
1302 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1303 | } |
c3e29312 ML |
1304 | |
1305 | kfree_skb(skb); | |
1306 | return NET_RX_SUCCESS; | |
fc957275 | 1307 | } |
1c280471 | 1308 | |
56303d34 | 1309 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 1310 | .name = "BATMAN_IV", |
fe8bc396 SE |
1311 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
1312 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
1313 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
1314 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
1315 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
1316 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
1c280471 ML |
1317 | }; |
1318 | ||
81c524f7 | 1319 | int __init batadv_iv_init(void) |
1c280471 | 1320 | { |
c3e29312 ML |
1321 | int ret; |
1322 | ||
1323 | /* batman originator packet */ | |
acd34afa SE |
1324 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
1325 | batadv_iv_ogm_receive); | |
c3e29312 ML |
1326 | if (ret < 0) |
1327 | goto out; | |
1328 | ||
fe8bc396 | 1329 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
1330 | if (ret < 0) |
1331 | goto handler_unregister; | |
1332 | ||
1333 | goto out; | |
1334 | ||
1335 | handler_unregister: | |
acd34afa | 1336 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
1337 | out: |
1338 | return ret; | |
1c280471 | 1339 | } |