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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" |
ee75ed88 | 31 | #include "fragmentation.h" |
af5d4f77 | 32 | |
bb079c82 | 33 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
c6c8fea2 | 34 | |
c6c8fea2 | 35 | /* send out an already prepared packet to the given address via the |
9cfc7bd6 SE |
36 | * specified batman interface |
37 | */ | |
56303d34 SE |
38 | int batadv_send_skb_packet(struct sk_buff *skb, |
39 | struct batadv_hard_iface *hard_iface, | |
9455e34c | 40 | const uint8_t *dst_addr) |
c6c8fea2 | 41 | { |
612d2b4f | 42 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 SE |
43 | struct ethhdr *ethhdr; |
44 | ||
e9a4f295 | 45 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
c6c8fea2 SE |
46 | goto send_skb_err; |
47 | ||
e6c10f43 | 48 | if (unlikely(!hard_iface->net_dev)) |
c6c8fea2 SE |
49 | goto send_skb_err; |
50 | ||
e6c10f43 | 51 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
67969581 SE |
52 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
53 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
54 | goto send_skb_err; |
55 | } | |
56 | ||
57 | /* push to the ethernet header. */ | |
04b482a2 | 58 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
c6c8fea2 SE |
59 | goto send_skb_err; |
60 | ||
61 | skb_reset_mac_header(skb); | |
62 | ||
7ed4be95 | 63 | ethhdr = eth_hdr(skb); |
e6c10f43 | 64 | memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 | 65 | memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); |
293e9338 | 66 | ethhdr->h_proto = htons(ETH_P_BATMAN); |
c6c8fea2 SE |
67 | |
68 | skb_set_network_header(skb, ETH_HLEN); | |
293e9338 | 69 | skb->protocol = htons(ETH_P_BATMAN); |
c6c8fea2 | 70 | |
e6c10f43 | 71 | skb->dev = hard_iface->net_dev; |
c6c8fea2 | 72 | |
612d2b4f MH |
73 | /* Save a clone of the skb to use when decoding coded packets */ |
74 | batadv_nc_skb_store_for_decoding(bat_priv, skb); | |
75 | ||
c6c8fea2 SE |
76 | /* dev_queue_xmit() returns a negative result on error. However on |
77 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP | |
9cfc7bd6 SE |
78 | * (which is > 0). This will not be treated as an error. |
79 | */ | |
c6c8fea2 SE |
80 | return dev_queue_xmit(skb); |
81 | send_skb_err: | |
82 | kfree_skb(skb); | |
83 | return NET_XMIT_DROP; | |
84 | } | |
85 | ||
bb351ba0 MH |
86 | /** |
87 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. | |
88 | * @skb: Packet to be transmitted. | |
89 | * @orig_node: Final destination of the packet. | |
90 | * @recv_if: Interface used when receiving the packet (can be NULL). | |
91 | * | |
92 | * Looks up the best next-hop towards the passed originator and passes the | |
93 | * skb on for preparation of MAC header. If the packet originated from this | |
94 | * host, NULL can be passed as recv_if and no interface alternating is | |
95 | * attempted. | |
96 | * | |
e91ecfc6 MH |
97 | * Returns NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
98 | * NET_XMIT_POLICED if the skb is buffered for later transmit. | |
bb351ba0 | 99 | */ |
e91ecfc6 MH |
100 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
101 | struct batadv_orig_node *orig_node, | |
102 | struct batadv_hard_iface *recv_if) | |
bb351ba0 MH |
103 | { |
104 | struct batadv_priv *bat_priv = orig_node->bat_priv; | |
105 | struct batadv_neigh_node *neigh_node; | |
e91ecfc6 | 106 | int ret = NET_XMIT_DROP; |
bb351ba0 MH |
107 | |
108 | /* batadv_find_router() increases neigh_nodes refcount if found. */ | |
109 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); | |
110 | if (!neigh_node) | |
ee75ed88 MH |
111 | goto out; |
112 | ||
113 | /* Check if the skb is too large to send in one piece and fragment | |
114 | * it if needed. | |
115 | */ | |
116 | if (atomic_read(&bat_priv->fragmentation) && | |
117 | skb->len > neigh_node->if_incoming->net_dev->mtu) { | |
118 | /* Fragment and send packet. */ | |
119 | if (batadv_frag_send_packet(skb, orig_node, neigh_node)) | |
120 | ret = NET_XMIT_SUCCESS; | |
121 | ||
122 | goto out; | |
123 | } | |
bb351ba0 | 124 | |
e91ecfc6 MH |
125 | /* try to network code the packet, if it is received on an interface |
126 | * (i.e. being forwarded). If the packet originates from this node or if | |
127 | * network coding fails, then send the packet as usual. | |
128 | */ | |
129 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { | |
130 | ret = NET_XMIT_POLICED; | |
131 | } else { | |
132 | batadv_send_skb_packet(skb, neigh_node->if_incoming, | |
133 | neigh_node->addr); | |
134 | ret = NET_XMIT_SUCCESS; | |
135 | } | |
bb351ba0 | 136 | |
ee75ed88 MH |
137 | out: |
138 | if (neigh_node) | |
139 | batadv_neigh_node_free_ref(neigh_node); | |
bb351ba0 | 140 | |
e91ecfc6 | 141 | return ret; |
bb351ba0 MH |
142 | } |
143 | ||
f097e25d MH |
144 | /** |
145 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the | |
146 | * common fields for unicast packets | |
147 | * @skb: the skb carrying the unicast header to initialize | |
148 | * @hdr_size: amount of bytes to push at the beginning of the skb | |
149 | * @orig_node: the destination node | |
150 | * | |
151 | * Returns false if the buffer extension was not possible or true otherwise. | |
152 | */ | |
153 | static bool | |
154 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, | |
155 | struct batadv_orig_node *orig_node) | |
156 | { | |
157 | struct batadv_unicast_packet *unicast_packet; | |
158 | uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
159 | ||
160 | if (batadv_skb_head_push(skb, hdr_size) < 0) | |
161 | return false; | |
162 | ||
163 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
a40d9b07 | 164 | unicast_packet->version = BATADV_COMPAT_VERSION; |
f097e25d | 165 | /* batman packet type: unicast */ |
a40d9b07 | 166 | unicast_packet->packet_type = BATADV_UNICAST; |
f097e25d | 167 | /* set unicast ttl */ |
a40d9b07 | 168 | unicast_packet->ttl = BATADV_TTL; |
f097e25d MH |
169 | /* copy the destination for faster routing */ |
170 | memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN); | |
171 | /* set the destination tt version number */ | |
172 | unicast_packet->ttvn = ttvn; | |
173 | ||
174 | return true; | |
175 | } | |
176 | ||
177 | /** | |
178 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header | |
179 | * @skb: the skb containing the payload to encapsulate | |
180 | * @orig_node: the destination node | |
181 | * | |
182 | * Returns false if the payload could not be encapsulated or true otherwise. | |
183 | */ | |
184 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, | |
185 | struct batadv_orig_node *orig_node) | |
186 | { | |
187 | size_t uni_size = sizeof(struct batadv_unicast_packet); | |
188 | ||
189 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); | |
190 | } | |
191 | ||
192 | /** | |
193 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a | |
194 | * unicast 4addr header | |
195 | * @bat_priv: the bat priv with all the soft interface information | |
196 | * @skb: the skb containing the payload to encapsulate | |
197 | * @orig_node: the destination node | |
198 | * @packet_subtype: the unicast 4addr packet subtype to use | |
199 | * | |
200 | * Returns false if the payload could not be encapsulated or true otherwise. | |
201 | */ | |
202 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, | |
203 | struct sk_buff *skb, | |
204 | struct batadv_orig_node *orig, | |
205 | int packet_subtype) | |
206 | { | |
207 | struct batadv_hard_iface *primary_if; | |
208 | struct batadv_unicast_4addr_packet *uc_4addr_packet; | |
209 | bool ret = false; | |
210 | ||
211 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
212 | if (!primary_if) | |
213 | goto out; | |
214 | ||
215 | /* Pull the header space and fill the unicast_packet substructure. | |
216 | * We can do that because the first member of the uc_4addr_packet | |
217 | * is of type struct unicast_packet | |
218 | */ | |
219 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), | |
220 | orig)) | |
221 | goto out; | |
222 | ||
223 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; | |
a40d9b07 | 224 | uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR; |
f097e25d MH |
225 | memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
226 | uc_4addr_packet->subtype = packet_subtype; | |
227 | uc_4addr_packet->reserved = 0; | |
228 | ||
229 | ret = true; | |
230 | out: | |
231 | if (primary_if) | |
232 | batadv_hardif_free_ref(primary_if); | |
233 | return ret; | |
234 | } | |
235 | ||
236 | /** | |
e300d314 | 237 | * batadv_send_skb_unicast - encapsulate and send an skb via unicast |
f097e25d MH |
238 | * @bat_priv: the bat priv with all the soft interface information |
239 | * @skb: payload to send | |
240 | * @packet_type: the batman unicast packet type to use | |
241 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
242 | * 4addr packets) | |
e300d314 | 243 | * @orig_node: the originator to send the packet to |
c018ad3d | 244 | * @vid: the vid to be used to search the translation table |
f097e25d | 245 | * |
e300d314 LL |
246 | * Wrap the given skb into a batman-adv unicast or unicast-4addr header |
247 | * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied | |
248 | * as packet_type. Then send this frame to the given orig_node and release a | |
249 | * reference to this orig_node. | |
250 | * | |
251 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
f097e25d | 252 | */ |
e300d314 LL |
253 | static int batadv_send_skb_unicast(struct batadv_priv *bat_priv, |
254 | struct sk_buff *skb, int packet_type, | |
255 | int packet_subtype, | |
256 | struct batadv_orig_node *orig_node, | |
257 | unsigned short vid) | |
f097e25d MH |
258 | { |
259 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
260 | struct batadv_unicast_packet *unicast_packet; | |
e300d314 | 261 | int ret = NET_XMIT_DROP; |
f097e25d | 262 | |
56a5ca84 | 263 | if (!orig_node) |
f097e25d MH |
264 | goto out; |
265 | ||
266 | switch (packet_type) { | |
267 | case BATADV_UNICAST: | |
33faa045 AQ |
268 | if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
269 | goto out; | |
f097e25d MH |
270 | break; |
271 | case BATADV_UNICAST_4ADDR: | |
33faa045 AQ |
272 | if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
273 | orig_node, | |
274 | packet_subtype)) | |
275 | goto out; | |
f097e25d MH |
276 | break; |
277 | default: | |
278 | /* this function supports UNICAST and UNICAST_4ADDR only. It | |
279 | * should never be invoked with any other packet type | |
280 | */ | |
281 | goto out; | |
282 | } | |
283 | ||
284 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
285 | ||
286 | /* inform the destination node that we are still missing a correct route | |
287 | * for this client. The destination will receive this packet and will | |
288 | * try to reroute it because the ttvn contained in the header is less | |
289 | * than the current one | |
290 | */ | |
c018ad3d | 291 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) |
f097e25d MH |
292 | unicast_packet->ttvn = unicast_packet->ttvn - 1; |
293 | ||
294 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) | |
e300d314 | 295 | ret = NET_XMIT_SUCCESS; |
f097e25d MH |
296 | |
297 | out: | |
f097e25d MH |
298 | if (orig_node) |
299 | batadv_orig_node_free_ref(orig_node); | |
e300d314 | 300 | if (ret == NET_XMIT_DROP) |
f097e25d MH |
301 | kfree_skb(skb); |
302 | return ret; | |
303 | } | |
304 | ||
e300d314 LL |
305 | /** |
306 | * batadv_send_skb_via_tt_generic - send an skb via TT lookup | |
307 | * @bat_priv: the bat priv with all the soft interface information | |
308 | * @skb: payload to send | |
309 | * @packet_type: the batman unicast packet type to use | |
310 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
311 | * 4addr packets) | |
312 | * @vid: the vid to be used to search the translation table | |
313 | * | |
314 | * Look up the recipient node for the destination address in the ethernet | |
315 | * header via the translation table. Wrap the given skb into a batman-adv | |
316 | * unicast or unicast-4addr header depending on whether BATADV_UNICAST or | |
317 | * BATADV_UNICAST_4ADDR was supplied as packet_type. Then send this frame | |
318 | * to the according destination node. | |
319 | * | |
320 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
321 | */ | |
322 | int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, | |
323 | struct sk_buff *skb, int packet_type, | |
324 | int packet_subtype, unsigned short vid) | |
325 | { | |
326 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
327 | struct batadv_orig_node *orig_node; | |
328 | ||
329 | orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source, | |
330 | ethhdr->h_dest, vid); | |
331 | return batadv_send_skb_unicast(bat_priv, skb, packet_type, | |
332 | packet_subtype, orig_node, vid); | |
333 | } | |
334 | ||
335 | /** | |
336 | * batadv_send_skb_via_gw - send an skb via gateway lookup | |
337 | * @bat_priv: the bat priv with all the soft interface information | |
338 | * @skb: payload to send | |
339 | * @vid: the vid to be used to search the translation table | |
340 | * | |
341 | * Look up the currently selected gateway. Wrap the given skb into a batman-adv | |
342 | * unicast header and send this frame to this gateway node. | |
343 | * | |
344 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
345 | */ | |
346 | int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, | |
347 | unsigned short vid) | |
348 | { | |
349 | struct batadv_orig_node *orig_node; | |
350 | ||
351 | orig_node = batadv_gw_get_selected_orig(bat_priv); | |
352 | return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, | |
353 | orig_node, vid); | |
354 | } | |
355 | ||
56303d34 | 356 | void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 357 | { |
56303d34 | 358 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 359 | |
e9a4f295 SE |
360 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
361 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
c6c8fea2 SE |
362 | return; |
363 | ||
9cfc7bd6 | 364 | /* the interface gets activated here to avoid race conditions between |
c6c8fea2 SE |
365 | * the moment of activating the interface in |
366 | * hardif_activate_interface() where the originator mac is set and | |
367 | * outdated packets (especially uninitialized mac addresses) in the | |
368 | * packet queue | |
369 | */ | |
e9a4f295 SE |
370 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
371 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
c6c8fea2 | 372 | |
be9aa4c1 | 373 | bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
c6c8fea2 SE |
374 | } |
375 | ||
56303d34 | 376 | static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) |
c6c8fea2 SE |
377 | { |
378 | if (forw_packet->skb) | |
379 | kfree_skb(forw_packet->skb); | |
6d5808d4 | 380 | if (forw_packet->if_incoming) |
e5d89254 | 381 | batadv_hardif_free_ref(forw_packet->if_incoming); |
c6c8fea2 SE |
382 | kfree(forw_packet); |
383 | } | |
384 | ||
56303d34 SE |
385 | static void |
386 | _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, | |
387 | struct batadv_forw_packet *forw_packet, | |
388 | unsigned long send_time) | |
c6c8fea2 | 389 | { |
c6c8fea2 SE |
390 | /* add new packet to packet list */ |
391 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
392 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); | |
393 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
394 | ||
395 | /* start timer for this packet */ | |
3193e8fd | 396 | queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
c6c8fea2 SE |
397 | send_time); |
398 | } | |
399 | ||
c6c8fea2 | 400 | /* add a broadcast packet to the queue and setup timers. broadcast packets |
015758d0 | 401 | * are sent multiple times to increase probability for being received. |
c6c8fea2 SE |
402 | * |
403 | * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on | |
404 | * errors. | |
405 | * | |
406 | * The skb is not consumed, so the caller should make sure that the | |
9cfc7bd6 SE |
407 | * skb is freed. |
408 | */ | |
56303d34 | 409 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
9455e34c SE |
410 | const struct sk_buff *skb, |
411 | unsigned long delay) | |
c6c8fea2 | 412 | { |
56303d34 SE |
413 | struct batadv_hard_iface *primary_if = NULL; |
414 | struct batadv_forw_packet *forw_packet; | |
96412690 | 415 | struct batadv_bcast_packet *bcast_packet; |
747e4221 | 416 | struct sk_buff *newskb; |
c6c8fea2 | 417 | |
3e34819e | 418 | if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
39c75a51 SE |
419 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
420 | "bcast packet queue full\n"); | |
c6c8fea2 SE |
421 | goto out; |
422 | } | |
423 | ||
e5d89254 | 424 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 425 | if (!primary_if) |
ca06c6eb | 426 | goto out_and_inc; |
c6c8fea2 | 427 | |
704509b8 | 428 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
c6c8fea2 SE |
429 | |
430 | if (!forw_packet) | |
431 | goto out_and_inc; | |
432 | ||
747e4221 SE |
433 | newskb = skb_copy(skb, GFP_ATOMIC); |
434 | if (!newskb) | |
c6c8fea2 SE |
435 | goto packet_free; |
436 | ||
437 | /* as we have a copy now, it is safe to decrease the TTL */ | |
96412690 | 438 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
a40d9b07 | 439 | bcast_packet->ttl--; |
c6c8fea2 | 440 | |
747e4221 | 441 | skb_reset_mac_header(newskb); |
c6c8fea2 | 442 | |
747e4221 | 443 | forw_packet->skb = newskb; |
32ae9b22 | 444 | forw_packet->if_incoming = primary_if; |
c6c8fea2 SE |
445 | |
446 | /* how often did we send the bcast packet ? */ | |
447 | forw_packet->num_packets = 0; | |
448 | ||
72414442 AQ |
449 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
450 | batadv_send_outstanding_bcast_packet); | |
451 | ||
bb079c82 | 452 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
c6c8fea2 SE |
453 | return NETDEV_TX_OK; |
454 | ||
455 | packet_free: | |
456 | kfree(forw_packet); | |
457 | out_and_inc: | |
458 | atomic_inc(&bat_priv->bcast_queue_left); | |
459 | out: | |
32ae9b22 | 460 | if (primary_if) |
e5d89254 | 461 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
462 | return NETDEV_TX_BUSY; |
463 | } | |
464 | ||
bb079c82 | 465 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
c6c8fea2 | 466 | { |
56303d34 | 467 | struct batadv_hard_iface *hard_iface; |
bbb1f90e | 468 | struct delayed_work *delayed_work; |
56303d34 | 469 | struct batadv_forw_packet *forw_packet; |
c6c8fea2 | 470 | struct sk_buff *skb1; |
56303d34 SE |
471 | struct net_device *soft_iface; |
472 | struct batadv_priv *bat_priv; | |
473 | ||
bbb1f90e | 474 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
475 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
476 | delayed_work); | |
477 | soft_iface = forw_packet->if_incoming->soft_iface; | |
478 | bat_priv = netdev_priv(soft_iface); | |
c6c8fea2 SE |
479 | |
480 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
481 | hlist_del(&forw_packet->list); | |
482 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
483 | ||
39c75a51 | 484 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
485 | goto out; |
486 | ||
c384ea3e AQ |
487 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
488 | goto out; | |
489 | ||
c6c8fea2 SE |
490 | /* rebroadcast packet */ |
491 | rcu_read_lock(); | |
3193e8fd | 492 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 493 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
494 | continue; |
495 | ||
caf65bfc MS |
496 | if (forw_packet->num_packets >= hard_iface->num_bcasts) |
497 | continue; | |
498 | ||
c6c8fea2 SE |
499 | /* send a copy of the saved skb */ |
500 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
501 | if (skb1) | |
9455e34c | 502 | batadv_send_skb_packet(skb1, hard_iface, |
3193e8fd | 503 | batadv_broadcast_addr); |
c6c8fea2 SE |
504 | } |
505 | rcu_read_unlock(); | |
506 | ||
507 | forw_packet->num_packets++; | |
508 | ||
509 | /* if we still have some more bcasts to send */ | |
caf65bfc | 510 | if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
bb079c82 SE |
511 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
512 | msecs_to_jiffies(5)); | |
c6c8fea2 SE |
513 | return; |
514 | } | |
515 | ||
516 | out: | |
bb079c82 | 517 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
518 | atomic_inc(&bat_priv->bcast_queue_left); |
519 | } | |
520 | ||
9455e34c | 521 | void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
c6c8fea2 | 522 | { |
bbb1f90e | 523 | struct delayed_work *delayed_work; |
56303d34 SE |
524 | struct batadv_forw_packet *forw_packet; |
525 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 526 | |
bbb1f90e | 527 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
528 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
529 | delayed_work); | |
c6c8fea2 SE |
530 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
531 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
532 | hlist_del(&forw_packet->list); | |
533 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
534 | ||
39c75a51 | 535 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
536 | goto out; |
537 | ||
01c4224b | 538 | bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); |
c6c8fea2 | 539 | |
9cfc7bd6 | 540 | /* we have to have at least one packet in the queue |
c6c8fea2 SE |
541 | * to determine the queues wake up time unless we are |
542 | * shutting down | |
543 | */ | |
544 | if (forw_packet->own) | |
9455e34c | 545 | batadv_schedule_bat_ogm(forw_packet->if_incoming); |
c6c8fea2 SE |
546 | |
547 | out: | |
548 | /* don't count own packet */ | |
549 | if (!forw_packet->own) | |
550 | atomic_inc(&bat_priv->batman_queue_left); | |
551 | ||
bb079c82 | 552 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
553 | } |
554 | ||
56303d34 SE |
555 | void |
556 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, | |
557 | const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 558 | { |
56303d34 | 559 | struct batadv_forw_packet *forw_packet; |
b67bfe0d | 560 | struct hlist_node *safe_tmp_node; |
6d5808d4 | 561 | bool pending; |
c6c8fea2 | 562 | |
e6c10f43 | 563 | if (hard_iface) |
39c75a51 | 564 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
565 | "purge_outstanding_packets(): %s\n", |
566 | hard_iface->net_dev->name); | |
c6c8fea2 | 567 | else |
39c75a51 | 568 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 569 | "purge_outstanding_packets()\n"); |
c6c8fea2 SE |
570 | |
571 | /* free bcast list */ | |
572 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
b67bfe0d | 573 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 574 | &bat_priv->forw_bcast_list, list) { |
9cfc7bd6 | 575 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
576 | * we delete only packets belonging to the given interface |
577 | */ | |
e6c10f43 ML |
578 | if ((hard_iface) && |
579 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
580 | continue; |
581 | ||
582 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
583 | ||
bb079c82 | 584 | /* batadv_send_outstanding_bcast_packet() will lock the list to |
c6c8fea2 SE |
585 | * delete the item from the list |
586 | */ | |
6d5808d4 | 587 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 588 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
6d5808d4 SE |
589 | |
590 | if (pending) { | |
591 | hlist_del(&forw_packet->list); | |
bb079c82 | 592 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 593 | } |
c6c8fea2 SE |
594 | } |
595 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
596 | ||
597 | /* free batman packet list */ | |
598 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
b67bfe0d | 599 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 600 | &bat_priv->forw_bat_list, list) { |
9cfc7bd6 | 601 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
602 | * we delete only packets belonging to the given interface |
603 | */ | |
e6c10f43 ML |
604 | if ((hard_iface) && |
605 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
606 | continue; |
607 | ||
608 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
609 | ||
9cfc7bd6 | 610 | /* send_outstanding_bat_packet() will lock the list to |
c6c8fea2 SE |
611 | * delete the item from the list |
612 | */ | |
6d5808d4 | 613 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 614 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
6d5808d4 SE |
615 | |
616 | if (pending) { | |
617 | hlist_del(&forw_packet->list); | |
bb079c82 | 618 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 619 | } |
c6c8fea2 SE |
620 | } |
621 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
622 | } |