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e19f9759 | 1 | /* Copyright (C) 2007-2014 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
18 | #include "main.h" | |
c384ea3e | 19 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
20 | #include "send.h" |
21 | #include "routing.h" | |
22 | #include "translation-table.h" | |
23 | #include "soft-interface.h" | |
24 | #include "hard-interface.h" | |
c6c8fea2 | 25 | #include "gateway_common.h" |
f097e25d | 26 | #include "gateway_client.h" |
c6c8fea2 | 27 | #include "originator.h" |
612d2b4f | 28 | #include "network-coding.h" |
ee75ed88 | 29 | #include "fragmentation.h" |
4c8755d6 | 30 | #include "multicast.h" |
af5d4f77 | 31 | |
bb079c82 | 32 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
c6c8fea2 | 33 | |
c6c8fea2 | 34 | /* send out an already prepared packet to the given address via the |
9cfc7bd6 SE |
35 | * specified batman interface |
36 | */ | |
56303d34 SE |
37 | int batadv_send_skb_packet(struct sk_buff *skb, |
38 | struct batadv_hard_iface *hard_iface, | |
9455e34c | 39 | const uint8_t *dst_addr) |
c6c8fea2 | 40 | { |
612d2b4f | 41 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 SE |
42 | struct ethhdr *ethhdr; |
43 | ||
e9a4f295 | 44 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
c6c8fea2 SE |
45 | goto send_skb_err; |
46 | ||
e6c10f43 | 47 | if (unlikely(!hard_iface->net_dev)) |
c6c8fea2 SE |
48 | goto send_skb_err; |
49 | ||
e6c10f43 | 50 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
67969581 SE |
51 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
52 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
53 | goto send_skb_err; |
54 | } | |
55 | ||
56 | /* push to the ethernet header. */ | |
04b482a2 | 57 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
c6c8fea2 SE |
58 | goto send_skb_err; |
59 | ||
60 | skb_reset_mac_header(skb); | |
61 | ||
7ed4be95 | 62 | ethhdr = eth_hdr(skb); |
8fdd0153 AQ |
63 | ether_addr_copy(ethhdr->h_source, hard_iface->net_dev->dev_addr); |
64 | ether_addr_copy(ethhdr->h_dest, dst_addr); | |
293e9338 | 65 | ethhdr->h_proto = htons(ETH_P_BATMAN); |
c6c8fea2 SE |
66 | |
67 | skb_set_network_header(skb, ETH_HLEN); | |
293e9338 | 68 | skb->protocol = htons(ETH_P_BATMAN); |
c6c8fea2 | 69 | |
e6c10f43 | 70 | skb->dev = hard_iface->net_dev; |
c6c8fea2 | 71 | |
612d2b4f MH |
72 | /* Save a clone of the skb to use when decoding coded packets */ |
73 | batadv_nc_skb_store_for_decoding(bat_priv, skb); | |
74 | ||
c6c8fea2 SE |
75 | /* dev_queue_xmit() returns a negative result on error. However on |
76 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP | |
9cfc7bd6 SE |
77 | * (which is > 0). This will not be treated as an error. |
78 | */ | |
c6c8fea2 SE |
79 | return dev_queue_xmit(skb); |
80 | send_skb_err: | |
81 | kfree_skb(skb); | |
82 | return NET_XMIT_DROP; | |
83 | } | |
84 | ||
bb351ba0 MH |
85 | /** |
86 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. | |
87 | * @skb: Packet to be transmitted. | |
88 | * @orig_node: Final destination of the packet. | |
89 | * @recv_if: Interface used when receiving the packet (can be NULL). | |
90 | * | |
91 | * Looks up the best next-hop towards the passed originator and passes the | |
92 | * skb on for preparation of MAC header. If the packet originated from this | |
93 | * host, NULL can be passed as recv_if and no interface alternating is | |
94 | * attempted. | |
95 | * | |
e91ecfc6 MH |
96 | * Returns NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
97 | * NET_XMIT_POLICED if the skb is buffered for later transmit. | |
bb351ba0 | 98 | */ |
e91ecfc6 MH |
99 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
100 | struct batadv_orig_node *orig_node, | |
101 | struct batadv_hard_iface *recv_if) | |
bb351ba0 MH |
102 | { |
103 | struct batadv_priv *bat_priv = orig_node->bat_priv; | |
104 | struct batadv_neigh_node *neigh_node; | |
e91ecfc6 | 105 | int ret = NET_XMIT_DROP; |
bb351ba0 MH |
106 | |
107 | /* batadv_find_router() increases neigh_nodes refcount if found. */ | |
108 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); | |
109 | if (!neigh_node) | |
ee75ed88 MH |
110 | goto out; |
111 | ||
112 | /* Check if the skb is too large to send in one piece and fragment | |
113 | * it if needed. | |
114 | */ | |
115 | if (atomic_read(&bat_priv->fragmentation) && | |
116 | skb->len > neigh_node->if_incoming->net_dev->mtu) { | |
117 | /* Fragment and send packet. */ | |
118 | if (batadv_frag_send_packet(skb, orig_node, neigh_node)) | |
119 | ret = NET_XMIT_SUCCESS; | |
120 | ||
121 | goto out; | |
122 | } | |
bb351ba0 | 123 | |
e91ecfc6 MH |
124 | /* try to network code the packet, if it is received on an interface |
125 | * (i.e. being forwarded). If the packet originates from this node or if | |
126 | * network coding fails, then send the packet as usual. | |
127 | */ | |
128 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { | |
129 | ret = NET_XMIT_POLICED; | |
130 | } else { | |
131 | batadv_send_skb_packet(skb, neigh_node->if_incoming, | |
132 | neigh_node->addr); | |
133 | ret = NET_XMIT_SUCCESS; | |
134 | } | |
bb351ba0 | 135 | |
ee75ed88 MH |
136 | out: |
137 | if (neigh_node) | |
138 | batadv_neigh_node_free_ref(neigh_node); | |
bb351ba0 | 139 | |
e91ecfc6 | 140 | return ret; |
bb351ba0 MH |
141 | } |
142 | ||
f097e25d MH |
143 | /** |
144 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the | |
145 | * common fields for unicast packets | |
146 | * @skb: the skb carrying the unicast header to initialize | |
147 | * @hdr_size: amount of bytes to push at the beginning of the skb | |
148 | * @orig_node: the destination node | |
149 | * | |
150 | * Returns false if the buffer extension was not possible or true otherwise. | |
151 | */ | |
152 | static bool | |
153 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, | |
154 | struct batadv_orig_node *orig_node) | |
155 | { | |
156 | struct batadv_unicast_packet *unicast_packet; | |
157 | uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
158 | ||
159 | if (batadv_skb_head_push(skb, hdr_size) < 0) | |
160 | return false; | |
161 | ||
162 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
a40d9b07 | 163 | unicast_packet->version = BATADV_COMPAT_VERSION; |
f097e25d | 164 | /* batman packet type: unicast */ |
a40d9b07 | 165 | unicast_packet->packet_type = BATADV_UNICAST; |
f097e25d | 166 | /* set unicast ttl */ |
a40d9b07 | 167 | unicast_packet->ttl = BATADV_TTL; |
f097e25d | 168 | /* copy the destination for faster routing */ |
8fdd0153 | 169 | ether_addr_copy(unicast_packet->dest, orig_node->orig); |
f097e25d MH |
170 | /* set the destination tt version number */ |
171 | unicast_packet->ttvn = ttvn; | |
172 | ||
173 | return true; | |
174 | } | |
175 | ||
176 | /** | |
177 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header | |
178 | * @skb: the skb containing the payload to encapsulate | |
179 | * @orig_node: the destination node | |
180 | * | |
181 | * Returns false if the payload could not be encapsulated or true otherwise. | |
182 | */ | |
183 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, | |
184 | struct batadv_orig_node *orig_node) | |
185 | { | |
186 | size_t uni_size = sizeof(struct batadv_unicast_packet); | |
187 | ||
188 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); | |
189 | } | |
190 | ||
191 | /** | |
192 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a | |
193 | * unicast 4addr header | |
194 | * @bat_priv: the bat priv with all the soft interface information | |
195 | * @skb: the skb containing the payload to encapsulate | |
196 | * @orig_node: the destination node | |
197 | * @packet_subtype: the unicast 4addr packet subtype to use | |
198 | * | |
199 | * Returns false if the payload could not be encapsulated or true otherwise. | |
200 | */ | |
201 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, | |
202 | struct sk_buff *skb, | |
203 | struct batadv_orig_node *orig, | |
204 | int packet_subtype) | |
205 | { | |
206 | struct batadv_hard_iface *primary_if; | |
207 | struct batadv_unicast_4addr_packet *uc_4addr_packet; | |
208 | bool ret = false; | |
209 | ||
210 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
211 | if (!primary_if) | |
212 | goto out; | |
213 | ||
214 | /* Pull the header space and fill the unicast_packet substructure. | |
215 | * We can do that because the first member of the uc_4addr_packet | |
216 | * is of type struct unicast_packet | |
217 | */ | |
218 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), | |
219 | orig)) | |
220 | goto out; | |
221 | ||
222 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; | |
a40d9b07 | 223 | uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR; |
8fdd0153 | 224 | ether_addr_copy(uc_4addr_packet->src, primary_if->net_dev->dev_addr); |
f097e25d MH |
225 | uc_4addr_packet->subtype = packet_subtype; |
226 | uc_4addr_packet->reserved = 0; | |
227 | ||
228 | ret = true; | |
229 | out: | |
230 | if (primary_if) | |
231 | batadv_hardif_free_ref(primary_if); | |
232 | return ret; | |
233 | } | |
234 | ||
235 | /** | |
e300d314 | 236 | * batadv_send_skb_unicast - encapsulate and send an skb via unicast |
f097e25d MH |
237 | * @bat_priv: the bat priv with all the soft interface information |
238 | * @skb: payload to send | |
239 | * @packet_type: the batman unicast packet type to use | |
240 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
241 | * 4addr packets) | |
e300d314 | 242 | * @orig_node: the originator to send the packet to |
c018ad3d | 243 | * @vid: the vid to be used to search the translation table |
f097e25d | 244 | * |
e300d314 LL |
245 | * Wrap the given skb into a batman-adv unicast or unicast-4addr header |
246 | * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied | |
247 | * as packet_type. Then send this frame to the given orig_node and release a | |
248 | * reference to this orig_node. | |
249 | * | |
250 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
f097e25d | 251 | */ |
1d8ab8d3 LL |
252 | int batadv_send_skb_unicast(struct batadv_priv *bat_priv, |
253 | struct sk_buff *skb, int packet_type, | |
254 | int packet_subtype, | |
255 | struct batadv_orig_node *orig_node, | |
256 | unsigned short vid) | |
f097e25d | 257 | { |
70b271a7 | 258 | struct ethhdr *ethhdr; |
f097e25d | 259 | struct batadv_unicast_packet *unicast_packet; |
927c2ed7 | 260 | int ret = NET_XMIT_DROP; |
f097e25d | 261 | |
56a5ca84 | 262 | if (!orig_node) |
f097e25d MH |
263 | goto out; |
264 | ||
265 | switch (packet_type) { | |
266 | case BATADV_UNICAST: | |
33faa045 AQ |
267 | if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
268 | goto out; | |
f097e25d MH |
269 | break; |
270 | case BATADV_UNICAST_4ADDR: | |
33faa045 AQ |
271 | if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
272 | orig_node, | |
273 | packet_subtype)) | |
274 | goto out; | |
f097e25d MH |
275 | break; |
276 | default: | |
277 | /* this function supports UNICAST and UNICAST_4ADDR only. It | |
278 | * should never be invoked with any other packet type | |
279 | */ | |
280 | goto out; | |
281 | } | |
282 | ||
927c2ed7 LL |
283 | /* skb->data might have been reallocated by |
284 | * batadv_send_skb_prepare_unicast{,_4addr}() | |
285 | */ | |
286 | ethhdr = eth_hdr(skb); | |
f097e25d MH |
287 | unicast_packet = (struct batadv_unicast_packet *)skb->data; |
288 | ||
289 | /* inform the destination node that we are still missing a correct route | |
290 | * for this client. The destination will receive this packet and will | |
291 | * try to reroute it because the ttvn contained in the header is less | |
292 | * than the current one | |
293 | */ | |
c018ad3d | 294 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) |
f097e25d MH |
295 | unicast_packet->ttvn = unicast_packet->ttvn - 1; |
296 | ||
297 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) | |
e300d314 | 298 | ret = NET_XMIT_SUCCESS; |
f097e25d MH |
299 | |
300 | out: | |
f097e25d MH |
301 | if (orig_node) |
302 | batadv_orig_node_free_ref(orig_node); | |
e300d314 | 303 | if (ret == NET_XMIT_DROP) |
f097e25d MH |
304 | kfree_skb(skb); |
305 | return ret; | |
306 | } | |
307 | ||
e300d314 LL |
308 | /** |
309 | * batadv_send_skb_via_tt_generic - send an skb via TT lookup | |
310 | * @bat_priv: the bat priv with all the soft interface information | |
311 | * @skb: payload to send | |
312 | * @packet_type: the batman unicast packet type to use | |
313 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
314 | * 4addr packets) | |
c5d3a652 | 315 | * @dst_hint: can be used to override the destination contained in the skb |
e300d314 LL |
316 | * @vid: the vid to be used to search the translation table |
317 | * | |
318 | * Look up the recipient node for the destination address in the ethernet | |
319 | * header via the translation table. Wrap the given skb into a batman-adv | |
320 | * unicast or unicast-4addr header depending on whether BATADV_UNICAST or | |
321 | * BATADV_UNICAST_4ADDR was supplied as packet_type. Then send this frame | |
322 | * to the according destination node. | |
323 | * | |
324 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
325 | */ | |
326 | int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, | |
327 | struct sk_buff *skb, int packet_type, | |
6c413b1c AQ |
328 | int packet_subtype, uint8_t *dst_hint, |
329 | unsigned short vid) | |
e300d314 LL |
330 | { |
331 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
332 | struct batadv_orig_node *orig_node; | |
6c413b1c AQ |
333 | uint8_t *src, *dst; |
334 | ||
335 | src = ethhdr->h_source; | |
336 | dst = ethhdr->h_dest; | |
337 | ||
338 | /* if we got an hint! let's send the packet to this client (if any) */ | |
339 | if (dst_hint) { | |
340 | src = NULL; | |
341 | dst = dst_hint; | |
342 | } | |
343 | orig_node = batadv_transtable_search(bat_priv, src, dst, vid); | |
e300d314 | 344 | |
e300d314 LL |
345 | return batadv_send_skb_unicast(bat_priv, skb, packet_type, |
346 | packet_subtype, orig_node, vid); | |
347 | } | |
348 | ||
349 | /** | |
350 | * batadv_send_skb_via_gw - send an skb via gateway lookup | |
351 | * @bat_priv: the bat priv with all the soft interface information | |
352 | * @skb: payload to send | |
353 | * @vid: the vid to be used to search the translation table | |
354 | * | |
355 | * Look up the currently selected gateway. Wrap the given skb into a batman-adv | |
356 | * unicast header and send this frame to this gateway node. | |
357 | * | |
358 | * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. | |
359 | */ | |
360 | int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, | |
361 | unsigned short vid) | |
362 | { | |
363 | struct batadv_orig_node *orig_node; | |
364 | ||
365 | orig_node = batadv_gw_get_selected_orig(bat_priv); | |
366 | return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, | |
367 | orig_node, vid); | |
368 | } | |
369 | ||
56303d34 | 370 | void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 371 | { |
56303d34 | 372 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 373 | |
e9a4f295 SE |
374 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
375 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
c6c8fea2 SE |
376 | return; |
377 | ||
9cfc7bd6 | 378 | /* the interface gets activated here to avoid race conditions between |
c6c8fea2 SE |
379 | * the moment of activating the interface in |
380 | * hardif_activate_interface() where the originator mac is set and | |
381 | * outdated packets (especially uninitialized mac addresses) in the | |
382 | * packet queue | |
383 | */ | |
e9a4f295 SE |
384 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
385 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
c6c8fea2 | 386 | |
be9aa4c1 | 387 | bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
c6c8fea2 SE |
388 | } |
389 | ||
56303d34 | 390 | static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) |
c6c8fea2 SE |
391 | { |
392 | if (forw_packet->skb) | |
393 | kfree_skb(forw_packet->skb); | |
6d5808d4 | 394 | if (forw_packet->if_incoming) |
e5d89254 | 395 | batadv_hardif_free_ref(forw_packet->if_incoming); |
ef0a937f SW |
396 | if (forw_packet->if_outgoing) |
397 | batadv_hardif_free_ref(forw_packet->if_outgoing); | |
c6c8fea2 SE |
398 | kfree(forw_packet); |
399 | } | |
400 | ||
56303d34 SE |
401 | static void |
402 | _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, | |
403 | struct batadv_forw_packet *forw_packet, | |
404 | unsigned long send_time) | |
c6c8fea2 | 405 | { |
c6c8fea2 SE |
406 | /* add new packet to packet list */ |
407 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
408 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); | |
409 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
410 | ||
411 | /* start timer for this packet */ | |
3193e8fd | 412 | queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
c6c8fea2 SE |
413 | send_time); |
414 | } | |
415 | ||
c6c8fea2 | 416 | /* add a broadcast packet to the queue and setup timers. broadcast packets |
015758d0 | 417 | * are sent multiple times to increase probability for being received. |
c6c8fea2 SE |
418 | * |
419 | * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on | |
420 | * errors. | |
421 | * | |
422 | * The skb is not consumed, so the caller should make sure that the | |
9cfc7bd6 SE |
423 | * skb is freed. |
424 | */ | |
56303d34 | 425 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
9455e34c SE |
426 | const struct sk_buff *skb, |
427 | unsigned long delay) | |
c6c8fea2 | 428 | { |
56303d34 SE |
429 | struct batadv_hard_iface *primary_if = NULL; |
430 | struct batadv_forw_packet *forw_packet; | |
96412690 | 431 | struct batadv_bcast_packet *bcast_packet; |
747e4221 | 432 | struct sk_buff *newskb; |
c6c8fea2 | 433 | |
3e34819e | 434 | if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
39c75a51 SE |
435 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
436 | "bcast packet queue full\n"); | |
c6c8fea2 SE |
437 | goto out; |
438 | } | |
439 | ||
e5d89254 | 440 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 441 | if (!primary_if) |
ca06c6eb | 442 | goto out_and_inc; |
c6c8fea2 | 443 | |
704509b8 | 444 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
c6c8fea2 SE |
445 | |
446 | if (!forw_packet) | |
447 | goto out_and_inc; | |
448 | ||
747e4221 SE |
449 | newskb = skb_copy(skb, GFP_ATOMIC); |
450 | if (!newskb) | |
c6c8fea2 SE |
451 | goto packet_free; |
452 | ||
453 | /* as we have a copy now, it is safe to decrease the TTL */ | |
96412690 | 454 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
a40d9b07 | 455 | bcast_packet->ttl--; |
c6c8fea2 | 456 | |
747e4221 | 457 | skb_reset_mac_header(newskb); |
c6c8fea2 | 458 | |
747e4221 | 459 | forw_packet->skb = newskb; |
32ae9b22 | 460 | forw_packet->if_incoming = primary_if; |
ef0a937f | 461 | forw_packet->if_outgoing = NULL; |
c6c8fea2 SE |
462 | |
463 | /* how often did we send the bcast packet ? */ | |
464 | forw_packet->num_packets = 0; | |
465 | ||
72414442 AQ |
466 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
467 | batadv_send_outstanding_bcast_packet); | |
468 | ||
bb079c82 | 469 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
c6c8fea2 SE |
470 | return NETDEV_TX_OK; |
471 | ||
472 | packet_free: | |
473 | kfree(forw_packet); | |
474 | out_and_inc: | |
475 | atomic_inc(&bat_priv->bcast_queue_left); | |
476 | out: | |
32ae9b22 | 477 | if (primary_if) |
e5d89254 | 478 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
479 | return NETDEV_TX_BUSY; |
480 | } | |
481 | ||
bb079c82 | 482 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
c6c8fea2 | 483 | { |
56303d34 | 484 | struct batadv_hard_iface *hard_iface; |
bbb1f90e | 485 | struct delayed_work *delayed_work; |
56303d34 | 486 | struct batadv_forw_packet *forw_packet; |
c6c8fea2 | 487 | struct sk_buff *skb1; |
56303d34 SE |
488 | struct net_device *soft_iface; |
489 | struct batadv_priv *bat_priv; | |
490 | ||
bbb1f90e | 491 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
492 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
493 | delayed_work); | |
494 | soft_iface = forw_packet->if_incoming->soft_iface; | |
495 | bat_priv = netdev_priv(soft_iface); | |
c6c8fea2 SE |
496 | |
497 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
498 | hlist_del(&forw_packet->list); | |
499 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
500 | ||
39c75a51 | 501 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
502 | goto out; |
503 | ||
c384ea3e AQ |
504 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
505 | goto out; | |
506 | ||
c6c8fea2 SE |
507 | /* rebroadcast packet */ |
508 | rcu_read_lock(); | |
3193e8fd | 509 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 510 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
511 | continue; |
512 | ||
caf65bfc MS |
513 | if (forw_packet->num_packets >= hard_iface->num_bcasts) |
514 | continue; | |
515 | ||
c6c8fea2 SE |
516 | /* send a copy of the saved skb */ |
517 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
518 | if (skb1) | |
9455e34c | 519 | batadv_send_skb_packet(skb1, hard_iface, |
3193e8fd | 520 | batadv_broadcast_addr); |
c6c8fea2 SE |
521 | } |
522 | rcu_read_unlock(); | |
523 | ||
524 | forw_packet->num_packets++; | |
525 | ||
526 | /* if we still have some more bcasts to send */ | |
caf65bfc | 527 | if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
bb079c82 SE |
528 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
529 | msecs_to_jiffies(5)); | |
c6c8fea2 SE |
530 | return; |
531 | } | |
532 | ||
533 | out: | |
bb079c82 | 534 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
535 | atomic_inc(&bat_priv->bcast_queue_left); |
536 | } | |
537 | ||
9455e34c | 538 | void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
c6c8fea2 | 539 | { |
bbb1f90e | 540 | struct delayed_work *delayed_work; |
56303d34 SE |
541 | struct batadv_forw_packet *forw_packet; |
542 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 543 | |
bbb1f90e | 544 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
545 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
546 | delayed_work); | |
c6c8fea2 SE |
547 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
548 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
549 | hlist_del(&forw_packet->list); | |
550 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
551 | ||
39c75a51 | 552 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
553 | goto out; |
554 | ||
01c4224b | 555 | bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); |
c6c8fea2 | 556 | |
ef0a937f SW |
557 | /* we have to have at least one packet in the queue to determine the |
558 | * queues wake up time unless we are shutting down. | |
559 | * | |
560 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
561 | * primary interface should only be rescheduled once per period, but | |
562 | * this function will be called for the forw_packet instances of the | |
563 | * other secondary interfaces as well. | |
c6c8fea2 | 564 | */ |
ef0a937f SW |
565 | if (forw_packet->own && |
566 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
9455e34c | 567 | batadv_schedule_bat_ogm(forw_packet->if_incoming); |
c6c8fea2 SE |
568 | |
569 | out: | |
570 | /* don't count own packet */ | |
571 | if (!forw_packet->own) | |
572 | atomic_inc(&bat_priv->batman_queue_left); | |
573 | ||
bb079c82 | 574 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
575 | } |
576 | ||
56303d34 SE |
577 | void |
578 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, | |
579 | const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 580 | { |
56303d34 | 581 | struct batadv_forw_packet *forw_packet; |
b67bfe0d | 582 | struct hlist_node *safe_tmp_node; |
6d5808d4 | 583 | bool pending; |
c6c8fea2 | 584 | |
e6c10f43 | 585 | if (hard_iface) |
39c75a51 | 586 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
587 | "purge_outstanding_packets(): %s\n", |
588 | hard_iface->net_dev->name); | |
c6c8fea2 | 589 | else |
39c75a51 | 590 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 591 | "purge_outstanding_packets()\n"); |
c6c8fea2 SE |
592 | |
593 | /* free bcast list */ | |
594 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
b67bfe0d | 595 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 596 | &bat_priv->forw_bcast_list, list) { |
9cfc7bd6 | 597 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
598 | * we delete only packets belonging to the given interface |
599 | */ | |
e6c10f43 ML |
600 | if ((hard_iface) && |
601 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
602 | continue; |
603 | ||
604 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
605 | ||
bb079c82 | 606 | /* batadv_send_outstanding_bcast_packet() will lock the list to |
c6c8fea2 SE |
607 | * delete the item from the list |
608 | */ | |
6d5808d4 | 609 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 610 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
6d5808d4 SE |
611 | |
612 | if (pending) { | |
613 | hlist_del(&forw_packet->list); | |
bb079c82 | 614 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 615 | } |
c6c8fea2 SE |
616 | } |
617 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
618 | ||
619 | /* free batman packet list */ | |
620 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
b67bfe0d | 621 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 622 | &bat_priv->forw_bat_list, list) { |
9cfc7bd6 | 623 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
624 | * we delete only packets belonging to the given interface |
625 | */ | |
e6c10f43 | 626 | if ((hard_iface) && |
ef0a937f SW |
627 | (forw_packet->if_incoming != hard_iface) && |
628 | (forw_packet->if_outgoing != hard_iface)) | |
c6c8fea2 SE |
629 | continue; |
630 | ||
631 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
632 | ||
9cfc7bd6 | 633 | /* send_outstanding_bat_packet() will lock the list to |
c6c8fea2 SE |
634 | * delete the item from the list |
635 | */ | |
6d5808d4 | 636 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 637 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
6d5808d4 SE |
638 | |
639 | if (pending) { | |
640 | hlist_del(&forw_packet->list); | |
bb079c82 | 641 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 642 | } |
c6c8fea2 SE |
643 | } |
644 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
645 | } |