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