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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
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 | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
c384ea3e | 21 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
22 | #include "send.h" |
23 | #include "routing.h" | |
24 | #include "translation-table.h" | |
25 | #include "soft-interface.h" | |
26 | #include "hard-interface.h" | |
c6c8fea2 | 27 | #include "gateway_common.h" |
f097e25d | 28 | #include "gateway_client.h" |
c6c8fea2 | 29 | #include "originator.h" |
612d2b4f | 30 | #include "network-coding.h" |
c6c8fea2 | 31 | |
af5d4f77 AQ |
32 | #include <linux/if_ether.h> |
33 | ||
bb079c82 | 34 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
c6c8fea2 | 35 | |
c6c8fea2 | 36 | /* send out an already prepared packet to the given address via the |
9cfc7bd6 SE |
37 | * specified batman interface |
38 | */ | |
56303d34 SE |
39 | int batadv_send_skb_packet(struct sk_buff *skb, |
40 | struct batadv_hard_iface *hard_iface, | |
9455e34c | 41 | const uint8_t *dst_addr) |
c6c8fea2 | 42 | { |
612d2b4f | 43 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 SE |
44 | struct ethhdr *ethhdr; |
45 | ||
e9a4f295 | 46 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
c6c8fea2 SE |
47 | goto send_skb_err; |
48 | ||
e6c10f43 | 49 | if (unlikely(!hard_iface->net_dev)) |
c6c8fea2 SE |
50 | goto send_skb_err; |
51 | ||
e6c10f43 | 52 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
67969581 SE |
53 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
54 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
55 | goto send_skb_err; |
56 | } | |
57 | ||
58 | /* push to the ethernet header. */ | |
04b482a2 | 59 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
c6c8fea2 SE |
60 | goto send_skb_err; |
61 | ||
62 | skb_reset_mac_header(skb); | |
63 | ||
7ed4be95 | 64 | ethhdr = eth_hdr(skb); |
e6c10f43 | 65 | memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 | 66 | memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); |
af5d4f77 | 67 | ethhdr->h_proto = __constant_htons(ETH_P_BATMAN); |
c6c8fea2 SE |
68 | |
69 | skb_set_network_header(skb, ETH_HLEN); | |
af5d4f77 | 70 | skb->protocol = __constant_htons(ETH_P_BATMAN); |
c6c8fea2 | 71 | |
e6c10f43 | 72 | skb->dev = hard_iface->net_dev; |
c6c8fea2 | 73 | |
612d2b4f MH |
74 | /* Save a clone of the skb to use when decoding coded packets */ |
75 | batadv_nc_skb_store_for_decoding(bat_priv, skb); | |
76 | ||
c6c8fea2 SE |
77 | /* dev_queue_xmit() returns a negative result on error. However on |
78 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP | |
9cfc7bd6 SE |
79 | * (which is > 0). This will not be treated as an error. |
80 | */ | |
c6c8fea2 SE |
81 | return dev_queue_xmit(skb); |
82 | send_skb_err: | |
83 | kfree_skb(skb); | |
84 | return NET_XMIT_DROP; | |
85 | } | |
86 | ||
bb351ba0 MH |
87 | /** |
88 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. | |
89 | * @skb: Packet to be transmitted. | |
90 | * @orig_node: Final destination of the packet. | |
91 | * @recv_if: Interface used when receiving the packet (can be NULL). | |
92 | * | |
93 | * Looks up the best next-hop towards the passed originator and passes the | |
94 | * skb on for preparation of MAC header. If the packet originated from this | |
95 | * host, NULL can be passed as recv_if and no interface alternating is | |
96 | * attempted. | |
97 | * | |
e91ecfc6 MH |
98 | * Returns NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
99 | * NET_XMIT_POLICED if the skb is buffered for later transmit. | |
bb351ba0 | 100 | */ |
e91ecfc6 MH |
101 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
102 | struct batadv_orig_node *orig_node, | |
103 | struct batadv_hard_iface *recv_if) | |
bb351ba0 MH |
104 | { |
105 | struct batadv_priv *bat_priv = orig_node->bat_priv; | |
106 | struct batadv_neigh_node *neigh_node; | |
e91ecfc6 | 107 | int ret = NET_XMIT_DROP; |
bb351ba0 MH |
108 | |
109 | /* batadv_find_router() increases neigh_nodes refcount if found. */ | |
110 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); | |
111 | if (!neigh_node) | |
e91ecfc6 | 112 | return ret; |
bb351ba0 | 113 | |
e91ecfc6 MH |
114 | /* try to network code the packet, if it is received on an interface |
115 | * (i.e. being forwarded). If the packet originates from this node or if | |
116 | * network coding fails, then send the packet as usual. | |
117 | */ | |
118 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { | |
119 | ret = NET_XMIT_POLICED; | |
120 | } else { | |
121 | batadv_send_skb_packet(skb, neigh_node->if_incoming, | |
122 | neigh_node->addr); | |
123 | ret = NET_XMIT_SUCCESS; | |
124 | } | |
bb351ba0 MH |
125 | |
126 | batadv_neigh_node_free_ref(neigh_node); | |
127 | ||
e91ecfc6 | 128 | return ret; |
bb351ba0 MH |
129 | } |
130 | ||
f097e25d MH |
131 | /** |
132 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the | |
133 | * common fields for unicast packets | |
134 | * @skb: the skb carrying the unicast header to initialize | |
135 | * @hdr_size: amount of bytes to push at the beginning of the skb | |
136 | * @orig_node: the destination node | |
137 | * | |
138 | * Returns false if the buffer extension was not possible or true otherwise. | |
139 | */ | |
140 | static bool | |
141 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, | |
142 | struct batadv_orig_node *orig_node) | |
143 | { | |
144 | struct batadv_unicast_packet *unicast_packet; | |
145 | uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
146 | ||
147 | if (batadv_skb_head_push(skb, hdr_size) < 0) | |
148 | return false; | |
149 | ||
150 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
151 | unicast_packet->header.version = BATADV_COMPAT_VERSION; | |
152 | /* batman packet type: unicast */ | |
153 | unicast_packet->header.packet_type = BATADV_UNICAST; | |
154 | /* set unicast ttl */ | |
155 | unicast_packet->header.ttl = BATADV_TTL; | |
156 | /* copy the destination for faster routing */ | |
157 | memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN); | |
158 | /* set the destination tt version number */ | |
159 | unicast_packet->ttvn = ttvn; | |
160 | ||
161 | return true; | |
162 | } | |
163 | ||
164 | /** | |
165 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header | |
166 | * @skb: the skb containing the payload to encapsulate | |
167 | * @orig_node: the destination node | |
168 | * | |
169 | * Returns false if the payload could not be encapsulated or true otherwise. | |
170 | */ | |
171 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, | |
172 | struct batadv_orig_node *orig_node) | |
173 | { | |
174 | size_t uni_size = sizeof(struct batadv_unicast_packet); | |
175 | ||
176 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); | |
177 | } | |
178 | ||
179 | /** | |
180 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a | |
181 | * unicast 4addr header | |
182 | * @bat_priv: the bat priv with all the soft interface information | |
183 | * @skb: the skb containing the payload to encapsulate | |
184 | * @orig_node: the destination node | |
185 | * @packet_subtype: the unicast 4addr packet subtype to use | |
186 | * | |
187 | * Returns false if the payload could not be encapsulated or true otherwise. | |
188 | */ | |
189 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, | |
190 | struct sk_buff *skb, | |
191 | struct batadv_orig_node *orig, | |
192 | int packet_subtype) | |
193 | { | |
194 | struct batadv_hard_iface *primary_if; | |
195 | struct batadv_unicast_4addr_packet *uc_4addr_packet; | |
196 | bool ret = false; | |
197 | ||
198 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
199 | if (!primary_if) | |
200 | goto out; | |
201 | ||
202 | /* Pull the header space and fill the unicast_packet substructure. | |
203 | * We can do that because the first member of the uc_4addr_packet | |
204 | * is of type struct unicast_packet | |
205 | */ | |
206 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), | |
207 | orig)) | |
208 | goto out; | |
209 | ||
210 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; | |
211 | uc_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR; | |
212 | memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
213 | uc_4addr_packet->subtype = packet_subtype; | |
214 | uc_4addr_packet->reserved = 0; | |
215 | ||
216 | ret = true; | |
217 | out: | |
218 | if (primary_if) | |
219 | batadv_hardif_free_ref(primary_if); | |
220 | return ret; | |
221 | } | |
222 | ||
223 | /** | |
224 | * batadv_send_generic_unicast_skb - send an skb as unicast | |
225 | * @bat_priv: the bat priv with all the soft interface information | |
226 | * @skb: payload to send | |
227 | * @packet_type: the batman unicast packet type to use | |
228 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
229 | * 4addr packets) | |
230 | * | |
231 | * Returns 1 in case of error or 0 otherwise. | |
232 | */ | |
233 | int batadv_send_skb_generic_unicast(struct batadv_priv *bat_priv, | |
234 | struct sk_buff *skb, int packet_type, | |
235 | int packet_subtype) | |
236 | { | |
237 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
238 | struct batadv_unicast_packet *unicast_packet; | |
239 | struct batadv_orig_node *orig_node; | |
240 | struct batadv_neigh_node *neigh_node; | |
241 | int ret = NET_RX_DROP; | |
242 | ||
243 | /* get routing information */ | |
244 | if (is_multicast_ether_addr(ethhdr->h_dest)) { | |
245 | orig_node = batadv_gw_get_selected_orig(bat_priv); | |
246 | if (orig_node) | |
247 | goto find_router; | |
248 | } | |
249 | ||
250 | /* check for tt host - increases orig_node refcount. | |
251 | * returns NULL in case of AP isolation | |
252 | */ | |
253 | orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source, | |
254 | ethhdr->h_dest); | |
255 | ||
256 | find_router: | |
257 | /* find_router(): | |
258 | * - if orig_node is NULL it returns NULL | |
259 | * - increases neigh_nodes refcount if found. | |
260 | */ | |
261 | neigh_node = batadv_find_router(bat_priv, orig_node, NULL); | |
262 | ||
263 | if (!neigh_node) | |
264 | goto out; | |
265 | ||
266 | switch (packet_type) { | |
267 | case BATADV_UNICAST: | |
268 | batadv_send_skb_prepare_unicast(skb, orig_node); | |
269 | break; | |
270 | case BATADV_UNICAST_4ADDR: | |
271 | batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, orig_node, | |
272 | packet_subtype); | |
273 | break; | |
274 | default: | |
275 | /* this function supports UNICAST and UNICAST_4ADDR only. It | |
276 | * should never be invoked with any other packet type | |
277 | */ | |
278 | goto out; | |
279 | } | |
280 | ||
281 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
282 | ||
283 | /* inform the destination node that we are still missing a correct route | |
284 | * for this client. The destination will receive this packet and will | |
285 | * try to reroute it because the ttvn contained in the header is less | |
286 | * than the current one | |
287 | */ | |
288 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest)) | |
289 | unicast_packet->ttvn = unicast_packet->ttvn - 1; | |
290 | ||
291 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) | |
292 | ret = 0; | |
293 | ||
294 | out: | |
295 | if (neigh_node) | |
296 | batadv_neigh_node_free_ref(neigh_node); | |
297 | if (orig_node) | |
298 | batadv_orig_node_free_ref(orig_node); | |
299 | if (ret == NET_RX_DROP) | |
300 | kfree_skb(skb); | |
301 | return ret; | |
302 | } | |
303 | ||
56303d34 | 304 | void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 305 | { |
56303d34 | 306 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 307 | |
e9a4f295 SE |
308 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
309 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
c6c8fea2 SE |
310 | return; |
311 | ||
9cfc7bd6 | 312 | /* the interface gets activated here to avoid race conditions between |
c6c8fea2 SE |
313 | * the moment of activating the interface in |
314 | * hardif_activate_interface() where the originator mac is set and | |
315 | * outdated packets (especially uninitialized mac addresses) in the | |
316 | * packet queue | |
317 | */ | |
e9a4f295 SE |
318 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
319 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
c6c8fea2 | 320 | |
be9aa4c1 | 321 | bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
c6c8fea2 SE |
322 | } |
323 | ||
56303d34 | 324 | static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) |
c6c8fea2 SE |
325 | { |
326 | if (forw_packet->skb) | |
327 | kfree_skb(forw_packet->skb); | |
6d5808d4 | 328 | if (forw_packet->if_incoming) |
e5d89254 | 329 | batadv_hardif_free_ref(forw_packet->if_incoming); |
c6c8fea2 SE |
330 | kfree(forw_packet); |
331 | } | |
332 | ||
56303d34 SE |
333 | static void |
334 | _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, | |
335 | struct batadv_forw_packet *forw_packet, | |
336 | unsigned long send_time) | |
c6c8fea2 | 337 | { |
c6c8fea2 SE |
338 | /* add new packet to packet list */ |
339 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
340 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); | |
341 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
342 | ||
343 | /* start timer for this packet */ | |
3193e8fd | 344 | queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
c6c8fea2 SE |
345 | send_time); |
346 | } | |
347 | ||
c6c8fea2 | 348 | /* add a broadcast packet to the queue and setup timers. broadcast packets |
015758d0 | 349 | * are sent multiple times to increase probability for being received. |
c6c8fea2 SE |
350 | * |
351 | * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on | |
352 | * errors. | |
353 | * | |
354 | * The skb is not consumed, so the caller should make sure that the | |
9cfc7bd6 SE |
355 | * skb is freed. |
356 | */ | |
56303d34 | 357 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
9455e34c SE |
358 | const struct sk_buff *skb, |
359 | unsigned long delay) | |
c6c8fea2 | 360 | { |
56303d34 SE |
361 | struct batadv_hard_iface *primary_if = NULL; |
362 | struct batadv_forw_packet *forw_packet; | |
96412690 | 363 | struct batadv_bcast_packet *bcast_packet; |
747e4221 | 364 | struct sk_buff *newskb; |
c6c8fea2 | 365 | |
3e34819e | 366 | if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
39c75a51 SE |
367 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
368 | "bcast packet queue full\n"); | |
c6c8fea2 SE |
369 | goto out; |
370 | } | |
371 | ||
e5d89254 | 372 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 373 | if (!primary_if) |
ca06c6eb | 374 | goto out_and_inc; |
c6c8fea2 | 375 | |
704509b8 | 376 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
c6c8fea2 SE |
377 | |
378 | if (!forw_packet) | |
379 | goto out_and_inc; | |
380 | ||
747e4221 SE |
381 | newskb = skb_copy(skb, GFP_ATOMIC); |
382 | if (!newskb) | |
c6c8fea2 SE |
383 | goto packet_free; |
384 | ||
385 | /* as we have a copy now, it is safe to decrease the TTL */ | |
96412690 | 386 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
76543d14 | 387 | bcast_packet->header.ttl--; |
c6c8fea2 | 388 | |
747e4221 | 389 | skb_reset_mac_header(newskb); |
c6c8fea2 | 390 | |
747e4221 | 391 | forw_packet->skb = newskb; |
32ae9b22 | 392 | forw_packet->if_incoming = primary_if; |
c6c8fea2 SE |
393 | |
394 | /* how often did we send the bcast packet ? */ | |
395 | forw_packet->num_packets = 0; | |
396 | ||
72414442 AQ |
397 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
398 | batadv_send_outstanding_bcast_packet); | |
399 | ||
bb079c82 | 400 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
c6c8fea2 SE |
401 | return NETDEV_TX_OK; |
402 | ||
403 | packet_free: | |
404 | kfree(forw_packet); | |
405 | out_and_inc: | |
406 | atomic_inc(&bat_priv->bcast_queue_left); | |
407 | out: | |
32ae9b22 | 408 | if (primary_if) |
e5d89254 | 409 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
410 | return NETDEV_TX_BUSY; |
411 | } | |
412 | ||
bb079c82 | 413 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
c6c8fea2 | 414 | { |
56303d34 | 415 | struct batadv_hard_iface *hard_iface; |
bbb1f90e | 416 | struct delayed_work *delayed_work; |
56303d34 | 417 | struct batadv_forw_packet *forw_packet; |
c6c8fea2 | 418 | struct sk_buff *skb1; |
56303d34 SE |
419 | struct net_device *soft_iface; |
420 | struct batadv_priv *bat_priv; | |
421 | ||
bbb1f90e | 422 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
423 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
424 | delayed_work); | |
425 | soft_iface = forw_packet->if_incoming->soft_iface; | |
426 | bat_priv = netdev_priv(soft_iface); | |
c6c8fea2 SE |
427 | |
428 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
429 | hlist_del(&forw_packet->list); | |
430 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
431 | ||
39c75a51 | 432 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
433 | goto out; |
434 | ||
c384ea3e AQ |
435 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
436 | goto out; | |
437 | ||
c6c8fea2 SE |
438 | /* rebroadcast packet */ |
439 | rcu_read_lock(); | |
3193e8fd | 440 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 441 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
442 | continue; |
443 | ||
caf65bfc MS |
444 | if (forw_packet->num_packets >= hard_iface->num_bcasts) |
445 | continue; | |
446 | ||
c6c8fea2 SE |
447 | /* send a copy of the saved skb */ |
448 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
449 | if (skb1) | |
9455e34c | 450 | batadv_send_skb_packet(skb1, hard_iface, |
3193e8fd | 451 | batadv_broadcast_addr); |
c6c8fea2 SE |
452 | } |
453 | rcu_read_unlock(); | |
454 | ||
455 | forw_packet->num_packets++; | |
456 | ||
457 | /* if we still have some more bcasts to send */ | |
caf65bfc | 458 | if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
bb079c82 SE |
459 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
460 | msecs_to_jiffies(5)); | |
c6c8fea2 SE |
461 | return; |
462 | } | |
463 | ||
464 | out: | |
bb079c82 | 465 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
466 | atomic_inc(&bat_priv->bcast_queue_left); |
467 | } | |
468 | ||
9455e34c | 469 | void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
c6c8fea2 | 470 | { |
bbb1f90e | 471 | struct delayed_work *delayed_work; |
56303d34 SE |
472 | struct batadv_forw_packet *forw_packet; |
473 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 474 | |
bbb1f90e | 475 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
476 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
477 | delayed_work); | |
c6c8fea2 SE |
478 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
479 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
480 | hlist_del(&forw_packet->list); | |
481 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
482 | ||
39c75a51 | 483 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
484 | goto out; |
485 | ||
01c4224b | 486 | bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); |
c6c8fea2 | 487 | |
9cfc7bd6 | 488 | /* we have to have at least one packet in the queue |
c6c8fea2 SE |
489 | * to determine the queues wake up time unless we are |
490 | * shutting down | |
491 | */ | |
492 | if (forw_packet->own) | |
9455e34c | 493 | batadv_schedule_bat_ogm(forw_packet->if_incoming); |
c6c8fea2 SE |
494 | |
495 | out: | |
496 | /* don't count own packet */ | |
497 | if (!forw_packet->own) | |
498 | atomic_inc(&bat_priv->batman_queue_left); | |
499 | ||
bb079c82 | 500 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
501 | } |
502 | ||
56303d34 SE |
503 | void |
504 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, | |
505 | const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 506 | { |
56303d34 | 507 | struct batadv_forw_packet *forw_packet; |
b67bfe0d | 508 | struct hlist_node *safe_tmp_node; |
6d5808d4 | 509 | bool pending; |
c6c8fea2 | 510 | |
e6c10f43 | 511 | if (hard_iface) |
39c75a51 | 512 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
513 | "purge_outstanding_packets(): %s\n", |
514 | hard_iface->net_dev->name); | |
c6c8fea2 | 515 | else |
39c75a51 | 516 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 517 | "purge_outstanding_packets()\n"); |
c6c8fea2 SE |
518 | |
519 | /* free bcast list */ | |
520 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
b67bfe0d | 521 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 522 | &bat_priv->forw_bcast_list, list) { |
9cfc7bd6 | 523 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
524 | * we delete only packets belonging to the given interface |
525 | */ | |
e6c10f43 ML |
526 | if ((hard_iface) && |
527 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
528 | continue; |
529 | ||
530 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
531 | ||
bb079c82 | 532 | /* batadv_send_outstanding_bcast_packet() will lock the list to |
c6c8fea2 SE |
533 | * delete the item from the list |
534 | */ | |
6d5808d4 | 535 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 536 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
6d5808d4 SE |
537 | |
538 | if (pending) { | |
539 | hlist_del(&forw_packet->list); | |
bb079c82 | 540 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 541 | } |
c6c8fea2 SE |
542 | } |
543 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
544 | ||
545 | /* free batman packet list */ | |
546 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
b67bfe0d | 547 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 548 | &bat_priv->forw_bat_list, list) { |
9cfc7bd6 | 549 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
550 | * we delete only packets belonging to the given interface |
551 | */ | |
e6c10f43 ML |
552 | if ((hard_iface) && |
553 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
554 | continue; |
555 | ||
556 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
557 | ||
9cfc7bd6 | 558 | /* send_outstanding_bat_packet() will lock the list to |
c6c8fea2 SE |
559 | * delete the item from the list |
560 | */ | |
6d5808d4 | 561 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 562 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
6d5808d4 SE |
563 | |
564 | if (pending) { | |
565 | hlist_del(&forw_packet->list); | |
bb079c82 | 566 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 567 | } |
c6c8fea2 SE |
568 | } |
569 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
570 | } |