Commit | Line | Data |
---|---|---|
c6c8fea2 | 1 | /* |
567db7b0 | 2 | * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include "main.h" | |
23 | #include "soft-interface.h" | |
24 | #include "hard-interface.h" | |
25 | #include "routing.h" | |
26 | #include "send.h" | |
27 | #include "bat_debugfs.h" | |
28 | #include "translation-table.h" | |
c6c8fea2 SE |
29 | #include "hash.h" |
30 | #include "gateway_common.h" | |
31 | #include "gateway_client.h" | |
c6c8fea2 | 32 | #include "bat_sysfs.h" |
43676ab5 | 33 | #include "originator.h" |
c6c8fea2 SE |
34 | #include <linux/slab.h> |
35 | #include <linux/ethtool.h> | |
36 | #include <linux/etherdevice.h> | |
37 | #include <linux/if_vlan.h> | |
38 | #include "unicast.h" | |
23721387 | 39 | #include "bridge_loop_avoidance.h" |
c6c8fea2 SE |
40 | |
41 | ||
42 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
43 | static void bat_get_drvinfo(struct net_device *dev, | |
44 | struct ethtool_drvinfo *info); | |
45 | static u32 bat_get_msglevel(struct net_device *dev); | |
46 | static void bat_set_msglevel(struct net_device *dev, u32 value); | |
47 | static u32 bat_get_link(struct net_device *dev); | |
c6c8fea2 SE |
48 | |
49 | static const struct ethtool_ops bat_ethtool_ops = { | |
50 | .get_settings = bat_get_settings, | |
51 | .get_drvinfo = bat_get_drvinfo, | |
52 | .get_msglevel = bat_get_msglevel, | |
53 | .set_msglevel = bat_set_msglevel, | |
54 | .get_link = bat_get_link, | |
c6c8fea2 SE |
55 | }; |
56 | ||
57 | int my_skb_head_push(struct sk_buff *skb, unsigned int len) | |
58 | { | |
59 | int result; | |
60 | ||
61 | /** | |
62 | * TODO: We must check if we can release all references to non-payload | |
63 | * data using skb_header_release in our skbs to allow skb_cow_header to | |
64 | * work optimally. This means that those skbs are not allowed to read | |
65 | * or write any data which is before the current position of skb->data | |
66 | * after that call and thus allow other skbs with the same data buffer | |
67 | * to write freely in that area. | |
68 | */ | |
69 | result = skb_cow_head(skb, len); | |
70 | if (result < 0) | |
71 | return result; | |
72 | ||
73 | skb_push(skb, len); | |
74 | return 0; | |
75 | } | |
76 | ||
c6c8fea2 SE |
77 | static int interface_open(struct net_device *dev) |
78 | { | |
79 | netif_start_queue(dev); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int interface_release(struct net_device *dev) | |
84 | { | |
85 | netif_stop_queue(dev); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static struct net_device_stats *interface_stats(struct net_device *dev) | |
90 | { | |
91 | struct bat_priv *bat_priv = netdev_priv(dev); | |
92 | return &bat_priv->stats; | |
93 | } | |
94 | ||
95 | static int interface_set_mac_addr(struct net_device *dev, void *p) | |
96 | { | |
97 | struct bat_priv *bat_priv = netdev_priv(dev); | |
98 | struct sockaddr *addr = p; | |
99 | ||
100 | if (!is_valid_ether_addr(addr->sa_data)) | |
101 | return -EADDRNOTAVAIL; | |
102 | ||
015758d0 | 103 | /* only modify transtable if it has been initialized before */ |
c6c8fea2 | 104 | if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) { |
2dafb49d | 105 | tt_local_remove(bat_priv, dev->dev_addr, |
cc47f66e | 106 | "mac address changed", false); |
bc279080 | 107 | tt_local_add(dev, addr->sa_data, NULL_IFINDEX); |
c6c8fea2 SE |
108 | } |
109 | ||
110 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
28009a6c | 111 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; |
c6c8fea2 SE |
112 | return 0; |
113 | } | |
114 | ||
115 | static int interface_change_mtu(struct net_device *dev, int new_mtu) | |
116 | { | |
117 | /* check ranges */ | |
118 | if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev))) | |
119 | return -EINVAL; | |
120 | ||
121 | dev->mtu = new_mtu; | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
db69ecfc | 126 | static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) |
c6c8fea2 SE |
127 | { |
128 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
129 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
32ae9b22 | 130 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
131 | struct bcast_packet *bcast_packet; |
132 | struct vlan_ethhdr *vhdr; | |
b1a8c04b SW |
133 | static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, |
134 | 0x00}; | |
be7af5cf | 135 | unsigned int header_len = 0; |
c6c8fea2 SE |
136 | int data_len = skb->len, ret; |
137 | short vid = -1; | |
be7af5cf | 138 | bool do_bcast = false; |
c6c8fea2 SE |
139 | |
140 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) | |
141 | goto dropped; | |
142 | ||
143 | soft_iface->trans_start = jiffies; | |
144 | ||
145 | switch (ntohs(ethhdr->h_proto)) { | |
146 | case ETH_P_8021Q: | |
147 | vhdr = (struct vlan_ethhdr *)skb->data; | |
148 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
149 | ||
150 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
151 | break; | |
152 | ||
153 | /* fall through */ | |
154 | case ETH_P_BATMAN: | |
c6c8fea2 | 155 | goto dropped; |
a7f6ee94 | 156 | } |
c6c8fea2 | 157 | |
23721387 SW |
158 | if (bla_tx(bat_priv, skb, vid)) |
159 | goto dropped; | |
160 | ||
a73105b8 | 161 | /* Register the client MAC in the transtable */ |
bc279080 | 162 | tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); |
c6c8fea2 | 163 | |
b1a8c04b SW |
164 | /* don't accept stp packets. STP does not help in meshes. |
165 | * better use the bridge loop avoidance ... | |
166 | */ | |
167 | if (compare_eth(ethhdr->h_dest, stp_addr)) | |
168 | goto dropped; | |
169 | ||
be7af5cf ML |
170 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
171 | do_bcast = true; | |
c6c8fea2 | 172 | |
be7af5cf ML |
173 | switch (atomic_read(&bat_priv->gw_mode)) { |
174 | case GW_MODE_SERVER: | |
175 | /* gateway servers should not send dhcp | |
176 | * requests into the mesh */ | |
177 | ret = gw_is_dhcp_target(skb, &header_len); | |
178 | if (ret) | |
179 | goto dropped; | |
180 | break; | |
181 | case GW_MODE_CLIENT: | |
182 | /* gateway clients should send dhcp requests | |
183 | * via unicast to their gateway */ | |
184 | ret = gw_is_dhcp_target(skb, &header_len); | |
185 | if (ret) | |
186 | do_bcast = false; | |
187 | break; | |
188 | case GW_MODE_OFF: | |
189 | default: | |
190 | break; | |
191 | } | |
c6c8fea2 SE |
192 | } |
193 | ||
194 | /* ethernet packet should be broadcasted */ | |
195 | if (do_bcast) { | |
32ae9b22 ML |
196 | primary_if = primary_if_get_selected(bat_priv); |
197 | if (!primary_if) | |
c6c8fea2 SE |
198 | goto dropped; |
199 | ||
704509b8 | 200 | if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
201 | goto dropped; |
202 | ||
203 | bcast_packet = (struct bcast_packet *)skb->data; | |
76543d14 SE |
204 | bcast_packet->header.version = COMPAT_VERSION; |
205 | bcast_packet->header.ttl = TTL; | |
c6c8fea2 SE |
206 | |
207 | /* batman packet type: broadcast */ | |
76543d14 | 208 | bcast_packet->header.packet_type = BAT_BCAST; |
c6c8fea2 SE |
209 | |
210 | /* hw address of first interface is the orig mac because only | |
211 | * this mac is known throughout the mesh */ | |
212 | memcpy(bcast_packet->orig, | |
32ae9b22 | 213 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
214 | |
215 | /* set broadcast sequence number */ | |
216 | bcast_packet->seqno = | |
217 | htonl(atomic_inc_return(&bat_priv->bcast_seqno)); | |
218 | ||
8698529d | 219 | add_bcast_packet_to_list(bat_priv, skb, 1); |
c6c8fea2 SE |
220 | |
221 | /* a copy is stored in the bcast list, therefore removing | |
222 | * the original skb. */ | |
223 | kfree_skb(skb); | |
224 | ||
225 | /* unicast packet */ | |
226 | } else { | |
be7af5cf ML |
227 | if (atomic_read(&bat_priv->gw_mode) != GW_MODE_OFF) { |
228 | ret = gw_out_of_range(bat_priv, skb, ethhdr); | |
229 | if (ret) | |
230 | goto dropped; | |
231 | } | |
232 | ||
c6c8fea2 SE |
233 | ret = unicast_send_skb(skb, bat_priv); |
234 | if (ret != 0) | |
235 | goto dropped_freed; | |
236 | } | |
237 | ||
238 | bat_priv->stats.tx_packets++; | |
239 | bat_priv->stats.tx_bytes += data_len; | |
240 | goto end; | |
241 | ||
242 | dropped: | |
243 | kfree_skb(skb); | |
244 | dropped_freed: | |
245 | bat_priv->stats.tx_dropped++; | |
246 | end: | |
32ae9b22 ML |
247 | if (primary_if) |
248 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
249 | return NETDEV_TX_OK; |
250 | } | |
251 | ||
252 | void interface_rx(struct net_device *soft_iface, | |
e6c10f43 | 253 | struct sk_buff *skb, struct hard_iface *recv_if, |
c6c8fea2 SE |
254 | int hdr_size) |
255 | { | |
256 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
c6c8fea2 SE |
257 | struct ethhdr *ethhdr; |
258 | struct vlan_ethhdr *vhdr; | |
259 | short vid = -1; | |
c6c8fea2 SE |
260 | |
261 | /* check if enough space is available for pulling, and pull */ | |
262 | if (!pskb_may_pull(skb, hdr_size)) | |
263 | goto dropped; | |
264 | ||
265 | skb_pull_rcsum(skb, hdr_size); | |
266 | skb_reset_mac_header(skb); | |
267 | ||
268 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
269 | ||
270 | switch (ntohs(ethhdr->h_proto)) { | |
271 | case ETH_P_8021Q: | |
272 | vhdr = (struct vlan_ethhdr *)skb->data; | |
273 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
274 | ||
275 | if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN) | |
276 | break; | |
277 | ||
278 | /* fall through */ | |
279 | case ETH_P_BATMAN: | |
280 | goto dropped; | |
281 | } | |
282 | ||
c6c8fea2 SE |
283 | /* skb->dev & skb->pkt_type are set here */ |
284 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
285 | goto dropped; | |
286 | skb->protocol = eth_type_trans(skb, soft_iface); | |
287 | ||
25985edc | 288 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 SE |
289 | * TODO: please verify this and remove this TODO |
290 | * -- Dec 21st 2009, Simon Wunderlich */ | |
291 | ||
292 | /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ | |
293 | ||
294 | bat_priv->stats.rx_packets++; | |
295 | bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr); | |
296 | ||
297 | soft_iface->last_rx = jiffies; | |
298 | ||
59b699cd AQ |
299 | if (is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) |
300 | goto dropped; | |
301 | ||
23721387 SW |
302 | /* Let the bridge loop avoidance check the packet. If will |
303 | * not handle it, we can safely push it up. | |
304 | */ | |
305 | if (bla_rx(bat_priv, skb, vid)) | |
306 | goto out; | |
307 | ||
c6c8fea2 | 308 | netif_rx(skb); |
ba85fac2 | 309 | goto out; |
c6c8fea2 SE |
310 | |
311 | dropped: | |
312 | kfree_skb(skb); | |
313 | out: | |
314 | return; | |
315 | } | |
316 | ||
c6c8fea2 SE |
317 | static const struct net_device_ops bat_netdev_ops = { |
318 | .ndo_open = interface_open, | |
319 | .ndo_stop = interface_release, | |
320 | .ndo_get_stats = interface_stats, | |
321 | .ndo_set_mac_address = interface_set_mac_addr, | |
322 | .ndo_change_mtu = interface_change_mtu, | |
323 | .ndo_start_xmit = interface_tx, | |
324 | .ndo_validate_addr = eth_validate_addr | |
325 | }; | |
c6c8fea2 SE |
326 | |
327 | static void interface_setup(struct net_device *dev) | |
328 | { | |
329 | struct bat_priv *priv = netdev_priv(dev); | |
c6c8fea2 SE |
330 | |
331 | ether_setup(dev); | |
332 | ||
c6c8fea2 | 333 | dev->netdev_ops = &bat_netdev_ops; |
c6c8fea2 | 334 | dev->destructor = free_netdev; |
af20b710 | 335 | dev->tx_queue_len = 0; |
c6c8fea2 SE |
336 | |
337 | /** | |
338 | * can't call min_mtu, because the needed variables | |
339 | * have not been initialized yet | |
340 | */ | |
341 | dev->mtu = ETH_DATA_LEN; | |
6e215fd8 SE |
342 | /* reserve more space in the skbuff for our header */ |
343 | dev->hard_header_len = BAT_HEADER_LEN; | |
c6c8fea2 SE |
344 | |
345 | /* generate random address */ | |
28009a6c | 346 | eth_hw_addr_random(dev); |
c6c8fea2 SE |
347 | |
348 | SET_ETHTOOL_OPS(dev, &bat_ethtool_ops); | |
349 | ||
704509b8 | 350 | memset(priv, 0, sizeof(*priv)); |
c6c8fea2 SE |
351 | } |
352 | ||
747e4221 | 353 | struct net_device *softif_create(const char *name) |
c6c8fea2 SE |
354 | { |
355 | struct net_device *soft_iface; | |
356 | struct bat_priv *bat_priv; | |
357 | int ret; | |
358 | ||
704509b8 | 359 | soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup); |
c6c8fea2 | 360 | |
320f422f | 361 | if (!soft_iface) |
c6c8fea2 | 362 | goto out; |
c6c8fea2 | 363 | |
c3caf519 | 364 | ret = register_netdevice(soft_iface); |
c6c8fea2 SE |
365 | if (ret < 0) { |
366 | pr_err("Unable to register the batman interface '%s': %i\n", | |
367 | name, ret); | |
368 | goto free_soft_iface; | |
369 | } | |
370 | ||
371 | bat_priv = netdev_priv(soft_iface); | |
372 | ||
373 | atomic_set(&bat_priv->aggregated_ogms, 1); | |
374 | atomic_set(&bat_priv->bonding, 0); | |
23721387 | 375 | atomic_set(&bat_priv->bridge_loop_avoidance, 0); |
59b699cd | 376 | atomic_set(&bat_priv->ap_isolation, 0); |
c6c8fea2 SE |
377 | atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); |
378 | atomic_set(&bat_priv->gw_mode, GW_MODE_OFF); | |
379 | atomic_set(&bat_priv->gw_sel_class, 20); | |
380 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
381 | atomic_set(&bat_priv->orig_interval, 1000); | |
8681a1c4 | 382 | atomic_set(&bat_priv->hop_penalty, 30); |
c6c8fea2 SE |
383 | atomic_set(&bat_priv->log_level, 0); |
384 | atomic_set(&bat_priv->fragmentation, 1); | |
385 | atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN); | |
386 | atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN); | |
387 | ||
388 | atomic_set(&bat_priv->mesh_state, MESH_INACTIVE); | |
389 | atomic_set(&bat_priv->bcast_seqno, 1); | |
a73105b8 AQ |
390 | atomic_set(&bat_priv->ttvn, 0); |
391 | atomic_set(&bat_priv->tt_local_changes, 0); | |
392 | atomic_set(&bat_priv->tt_ogm_append_cnt, 0); | |
23721387 | 393 | atomic_set(&bat_priv->bla_num_requests, 0); |
a73105b8 AQ |
394 | |
395 | bat_priv->tt_buff = NULL; | |
396 | bat_priv->tt_buff_len = 0; | |
cc47f66e | 397 | bat_priv->tt_poss_change = false; |
c6c8fea2 SE |
398 | |
399 | bat_priv->primary_if = NULL; | |
400 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 401 | |
1c280471 ML |
402 | ret = bat_algo_select(bat_priv, bat_routing_algo); |
403 | if (ret < 0) | |
404 | goto unreg_soft_iface; | |
405 | ||
c6c8fea2 SE |
406 | ret = sysfs_add_meshif(soft_iface); |
407 | if (ret < 0) | |
408 | goto unreg_soft_iface; | |
409 | ||
410 | ret = debugfs_add_meshif(soft_iface); | |
411 | if (ret < 0) | |
412 | goto unreg_sysfs; | |
413 | ||
414 | ret = mesh_init(soft_iface); | |
415 | if (ret < 0) | |
416 | goto unreg_debugfs; | |
417 | ||
418 | return soft_iface; | |
419 | ||
420 | unreg_debugfs: | |
421 | debugfs_del_meshif(soft_iface); | |
422 | unreg_sysfs: | |
423 | sysfs_del_meshif(soft_iface); | |
424 | unreg_soft_iface: | |
06ba7ce2 | 425 | unregister_netdevice(soft_iface); |
c6c8fea2 SE |
426 | return NULL; |
427 | ||
428 | free_soft_iface: | |
429 | free_netdev(soft_iface); | |
430 | out: | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | void softif_destroy(struct net_device *soft_iface) | |
435 | { | |
436 | debugfs_del_meshif(soft_iface); | |
437 | sysfs_del_meshif(soft_iface); | |
438 | mesh_free(soft_iface); | |
439 | unregister_netdevice(soft_iface); | |
440 | } | |
441 | ||
747e4221 | 442 | int softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 443 | { |
e44d8fe2 SE |
444 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) |
445 | return 1; | |
e44d8fe2 SE |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
c6c8fea2 SE |
450 | /* ethtool */ |
451 | static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
452 | { | |
453 | cmd->supported = 0; | |
454 | cmd->advertising = 0; | |
70739497 | 455 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
456 | cmd->duplex = DUPLEX_FULL; |
457 | cmd->port = PORT_TP; | |
458 | cmd->phy_address = 0; | |
459 | cmd->transceiver = XCVR_INTERNAL; | |
460 | cmd->autoneg = AUTONEG_DISABLE; | |
461 | cmd->maxtxpkt = 0; | |
462 | cmd->maxrxpkt = 0; | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static void bat_get_drvinfo(struct net_device *dev, | |
468 | struct ethtool_drvinfo *info) | |
469 | { | |
470 | strcpy(info->driver, "B.A.T.M.A.N. advanced"); | |
471 | strcpy(info->version, SOURCE_VERSION); | |
472 | strcpy(info->fw_version, "N/A"); | |
473 | strcpy(info->bus_info, "batman"); | |
474 | } | |
475 | ||
476 | static u32 bat_get_msglevel(struct net_device *dev) | |
477 | { | |
478 | return -EOPNOTSUPP; | |
479 | } | |
480 | ||
481 | static void bat_set_msglevel(struct net_device *dev, u32 value) | |
482 | { | |
483 | } | |
484 | ||
485 | static u32 bat_get_link(struct net_device *dev) | |
486 | { | |
487 | return 1; | |
488 | } |