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32bad7e3 | 1 | /* |
2 | * Copyright 2007-2012 Siemens AG | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Written by: | |
18 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
19 | * Sergey Lapin <slapin@ossfans.org> | |
20 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> | |
21 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
22 | */ | |
23 | ||
24 | #include <linux/netdevice.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/if_arp.h> | |
27 | ||
28 | #include <net/rtnetlink.h> | |
29 | #include <linux/nl802154.h> | |
30 | #include <net/af_ieee802154.h> | |
31 | #include <net/mac802154.h> | |
32 | #include <net/ieee802154_netdev.h> | |
33 | #include <net/ieee802154.h> | |
34 | #include <net/wpan-phy.h> | |
35 | ||
36 | #include "mac802154.h" | |
37 | ||
32bad7e3 | 38 | static int |
39 | mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
40 | { | |
41 | struct mac802154_sub_if_data *priv = netdev_priv(dev); | |
42 | struct sockaddr_ieee802154 *sa = | |
43 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; | |
44 | int err = -ENOIOCTLCMD; | |
45 | ||
46 | spin_lock_bh(&priv->mib_lock); | |
47 | ||
48 | switch (cmd) { | |
49 | case SIOCGIFADDR: | |
b70ab2e8 PB |
50 | { |
51 | u16 pan_id, short_addr; | |
52 | ||
53 | pan_id = le16_to_cpu(priv->pan_id); | |
54 | short_addr = le16_to_cpu(priv->short_addr); | |
55 | if (pan_id == IEEE802154_PANID_BROADCAST || | |
56 | short_addr == IEEE802154_ADDR_BROADCAST) { | |
32bad7e3 | 57 | err = -EADDRNOTAVAIL; |
58 | break; | |
59 | } | |
60 | ||
61 | sa->family = AF_IEEE802154; | |
62 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; | |
b70ab2e8 PB |
63 | sa->addr.pan_id = pan_id; |
64 | sa->addr.short_addr = short_addr; | |
32bad7e3 | 65 | |
66 | err = 0; | |
67 | break; | |
b70ab2e8 | 68 | } |
32bad7e3 | 69 | case SIOCSIFADDR: |
70 | dev_warn(&dev->dev, | |
71 | "Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\n"); | |
72 | if (sa->family != AF_IEEE802154 || | |
73 | sa->addr.addr_type != IEEE802154_ADDR_SHORT || | |
74 | sa->addr.pan_id == IEEE802154_PANID_BROADCAST || | |
75 | sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || | |
76 | sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { | |
77 | err = -EINVAL; | |
78 | break; | |
79 | } | |
80 | ||
b70ab2e8 PB |
81 | priv->pan_id = cpu_to_le16(sa->addr.pan_id); |
82 | priv->short_addr = cpu_to_le16(sa->addr.short_addr); | |
32bad7e3 | 83 | |
84 | err = 0; | |
85 | break; | |
86 | } | |
87 | ||
88 | spin_unlock_bh(&priv->mib_lock); | |
89 | return err; | |
90 | } | |
91 | ||
92 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) | |
93 | { | |
94 | struct sockaddr *addr = p; | |
95 | ||
96 | if (netif_running(dev)) | |
97 | return -EBUSY; | |
98 | ||
99 | /* FIXME: validate addr */ | |
100 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
101 | mac802154_dev_set_ieee_addr(dev); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int mac802154_header_create(struct sk_buff *skb, | |
106 | struct net_device *dev, | |
107 | unsigned short type, | |
e6278d92 PB |
108 | const void *daddr, |
109 | const void *saddr, | |
32bad7e3 | 110 | unsigned len) |
111 | { | |
e6278d92 | 112 | struct ieee802154_hdr hdr; |
32bad7e3 | 113 | struct mac802154_sub_if_data *priv = netdev_priv(dev); |
e6278d92 | 114 | int hlen; |
32bad7e3 | 115 | |
116 | if (!daddr) | |
117 | return -EINVAL; | |
118 | ||
e6278d92 PB |
119 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
120 | hdr.fc.type = mac_cb_type(skb); | |
121 | hdr.fc.security_enabled = mac_cb_is_secen(skb); | |
122 | hdr.fc.ack_request = mac_cb_is_ackreq(skb); | |
32bad7e3 | 123 | |
124 | if (!saddr) { | |
125 | spin_lock_bh(&priv->mib_lock); | |
126 | ||
b70ab2e8 PB |
127 | if (priv->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
128 | priv->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
129 | priv->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 PB |
130 | hdr.source.mode = IEEE802154_ADDR_LONG; |
131 | hdr.source.extended_addr = priv->extended_addr; | |
32bad7e3 | 132 | } else { |
e6278d92 PB |
133 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
134 | hdr.source.short_addr = priv->short_addr; | |
32bad7e3 | 135 | } |
136 | ||
e6278d92 | 137 | hdr.source.pan_id = priv->pan_id; |
32bad7e3 | 138 | |
139 | spin_unlock_bh(&priv->mib_lock); | |
e6278d92 PB |
140 | } else { |
141 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 142 | } |
143 | ||
e6278d92 | 144 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 145 | |
e6278d92 PB |
146 | hlen = ieee802154_hdr_push(skb, &hdr); |
147 | if (hlen < 0) | |
148 | return -EINVAL; | |
32bad7e3 | 149 | |
3e69162e | 150 | skb_reset_mac_header(skb); |
e6278d92 | 151 | skb->mac_len = hlen; |
32bad7e3 | 152 | |
d1d7358e PB |
153 | if (hlen + len + 2 > dev->mtu) |
154 | return -EMSGSIZE; | |
155 | ||
e6278d92 | 156 | return hlen; |
32bad7e3 | 157 | } |
158 | ||
159 | static int | |
160 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
161 | { | |
e6278d92 PB |
162 | struct ieee802154_hdr hdr; |
163 | struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; | |
32bad7e3 | 164 | |
e6278d92 PB |
165 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
166 | pr_debug("malformed packet\n"); | |
167 | return 0; | |
32bad7e3 | 168 | } |
169 | ||
e6278d92 PB |
170 | *addr = hdr.source; |
171 | return sizeof(*addr); | |
32bad7e3 | 172 | } |
173 | ||
174 | static netdev_tx_t | |
175 | mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev) | |
176 | { | |
177 | struct mac802154_sub_if_data *priv; | |
178 | u8 chan, page; | |
179 | ||
180 | priv = netdev_priv(dev); | |
181 | ||
182 | spin_lock_bh(&priv->mib_lock); | |
183 | chan = priv->chan; | |
184 | page = priv->page; | |
185 | spin_unlock_bh(&priv->mib_lock); | |
186 | ||
187 | if (chan == MAC802154_CHAN_NONE || | |
188 | page >= WPAN_NUM_PAGES || | |
fcefbe9f AO |
189 | chan >= WPAN_NUM_CHANNELS) { |
190 | kfree_skb(skb); | |
32bad7e3 | 191 | return NETDEV_TX_OK; |
fcefbe9f | 192 | } |
32bad7e3 | 193 | |
194 | skb->skb_iif = dev->ifindex; | |
195 | dev->stats.tx_packets++; | |
196 | dev->stats.tx_bytes += skb->len; | |
197 | ||
198 | return mac802154_tx(priv->hw, skb, page, chan); | |
199 | } | |
200 | ||
201 | static struct header_ops mac802154_header_ops = { | |
202 | .create = mac802154_header_create, | |
203 | .parse = mac802154_header_parse, | |
204 | }; | |
205 | ||
206 | static const struct net_device_ops mac802154_wpan_ops = { | |
207 | .ndo_open = mac802154_slave_open, | |
208 | .ndo_stop = mac802154_slave_close, | |
209 | .ndo_start_xmit = mac802154_wpan_xmit, | |
210 | .ndo_do_ioctl = mac802154_wpan_ioctl, | |
211 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
212 | }; | |
213 | ||
214 | void mac802154_wpan_setup(struct net_device *dev) | |
215 | { | |
216 | struct mac802154_sub_if_data *priv; | |
217 | ||
218 | dev->addr_len = IEEE802154_ADDR_LEN; | |
219 | memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); | |
220 | ||
221 | dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; | |
222 | dev->header_ops = &mac802154_header_ops; | |
223 | dev->needed_tailroom = 2; /* FCS */ | |
224 | dev->mtu = IEEE802154_MTU; | |
e937f583 | 225 | dev->tx_queue_len = 300; |
32bad7e3 | 226 | dev->type = ARPHRD_IEEE802154; |
227 | dev->flags = IFF_NOARP | IFF_BROADCAST; | |
228 | dev->watchdog_timeo = 0; | |
229 | ||
230 | dev->destructor = free_netdev; | |
231 | dev->netdev_ops = &mac802154_wpan_ops; | |
232 | dev->ml_priv = &mac802154_mlme_wpan; | |
233 | ||
234 | priv = netdev_priv(dev); | |
235 | priv->type = IEEE802154_DEV_WPAN; | |
236 | ||
237 | priv->chan = MAC802154_CHAN_NONE; | |
238 | priv->page = 0; | |
239 | ||
240 | spin_lock_init(&priv->mib_lock); | |
241 | ||
242 | get_random_bytes(&priv->bsn, 1); | |
243 | get_random_bytes(&priv->dsn, 1); | |
244 | ||
b70ab2e8 PB |
245 | priv->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
246 | priv->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
32bad7e3 | 247 | } |
248 | ||
249 | static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb) | |
250 | { | |
5ff3fec6 | 251 | return netif_rx_ni(skb); |
32bad7e3 | 252 | } |
253 | ||
254 | static int | |
255 | mac802154_subif_frame(struct mac802154_sub_if_data *sdata, struct sk_buff *skb) | |
256 | { | |
ae531b94 | 257 | __le16 span, sshort; |
b70ab2e8 | 258 | |
32bad7e3 | 259 | pr_debug("getting packet via slave interface %s\n", sdata->dev->name); |
260 | ||
261 | spin_lock_bh(&sdata->mib_lock); | |
262 | ||
ae531b94 PB |
263 | span = sdata->pan_id; |
264 | sshort = sdata->short_addr; | |
b70ab2e8 | 265 | |
ae531b94 | 266 | switch (mac_cb(skb)->dest.mode) { |
32bad7e3 | 267 | case IEEE802154_ADDR_NONE: |
ae531b94 | 268 | if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE) |
32bad7e3 | 269 | /* FIXME: check if we are PAN coordinator */ |
270 | skb->pkt_type = PACKET_OTHERHOST; | |
271 | else | |
272 | /* ACK comes with both addresses empty */ | |
273 | skb->pkt_type = PACKET_HOST; | |
274 | break; | |
275 | case IEEE802154_ADDR_LONG: | |
ae531b94 PB |
276 | if (mac_cb(skb)->dest.pan_id != span && |
277 | mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST)) | |
32bad7e3 | 278 | skb->pkt_type = PACKET_OTHERHOST; |
ae531b94 | 279 | else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr) |
32bad7e3 | 280 | skb->pkt_type = PACKET_HOST; |
281 | else | |
282 | skb->pkt_type = PACKET_OTHERHOST; | |
283 | break; | |
284 | case IEEE802154_ADDR_SHORT: | |
ae531b94 PB |
285 | if (mac_cb(skb)->dest.pan_id != span && |
286 | mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST)) | |
32bad7e3 | 287 | skb->pkt_type = PACKET_OTHERHOST; |
ae531b94 | 288 | else if (mac_cb(skb)->dest.short_addr == sshort) |
32bad7e3 | 289 | skb->pkt_type = PACKET_HOST; |
ae531b94 PB |
290 | else if (mac_cb(skb)->dest.short_addr == |
291 | cpu_to_le16(IEEE802154_ADDR_BROADCAST)) | |
32bad7e3 | 292 | skb->pkt_type = PACKET_BROADCAST; |
293 | else | |
294 | skb->pkt_type = PACKET_OTHERHOST; | |
295 | break; | |
296 | default: | |
297 | break; | |
298 | } | |
299 | ||
300 | spin_unlock_bh(&sdata->mib_lock); | |
301 | ||
302 | skb->dev = sdata->dev; | |
303 | ||
304 | sdata->dev->stats.rx_packets++; | |
305 | sdata->dev->stats.rx_bytes += skb->len; | |
306 | ||
307 | switch (mac_cb_type(skb)) { | |
308 | case IEEE802154_FC_TYPE_DATA: | |
309 | return mac802154_process_data(sdata->dev, skb); | |
310 | default: | |
2cc33c7e WC |
311 | pr_warn("ieee802154: bad frame received (type = %d)\n", |
312 | mac_cb_type(skb)); | |
32bad7e3 | 313 | kfree_skb(skb); |
314 | return NET_RX_DROP; | |
315 | } | |
316 | } | |
317 | ||
e6278d92 PB |
318 | static void mac802154_print_addr(const char *name, |
319 | const struct ieee802154_addr *addr) | |
32bad7e3 | 320 | { |
e6278d92 PB |
321 | if (addr->mode == IEEE802154_ADDR_NONE) |
322 | pr_debug("%s not present\n", name); | |
32bad7e3 | 323 | |
e6278d92 PB |
324 | pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id)); |
325 | if (addr->mode == IEEE802154_ADDR_SHORT) { | |
326 | pr_debug("%s is short: %04x\n", name, | |
327 | le16_to_cpu(addr->short_addr)); | |
328 | } else { | |
329 | u64 hw = swab64((__force u64) addr->extended_addr); | |
32bad7e3 | 330 | |
e6278d92 PB |
331 | pr_debug("%s is hardware: %8phC\n", name, &hw); |
332 | } | |
333 | } | |
32bad7e3 | 334 | |
e6278d92 PB |
335 | static int mac802154_parse_frame_start(struct sk_buff *skb) |
336 | { | |
e6278d92 | 337 | int hlen; |
ae531b94 | 338 | struct ieee802154_hdr hdr; |
32bad7e3 | 339 | |
e6278d92 PB |
340 | hlen = ieee802154_hdr_pull(skb, &hdr); |
341 | if (hlen < 0) | |
342 | return -EINVAL; | |
32bad7e3 | 343 | |
e6278d92 | 344 | skb->mac_len = hlen; |
32bad7e3 | 345 | |
e6278d92 PB |
346 | pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr.fc), |
347 | hdr.seq); | |
32bad7e3 | 348 | |
e6278d92 | 349 | mac_cb(skb)->flags = hdr.fc.type; |
32bad7e3 | 350 | |
e6278d92 PB |
351 | if (hdr.fc.ack_request) |
352 | mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ; | |
353 | if (hdr.fc.security_enabled) | |
354 | mac_cb(skb)->flags |= MAC_CB_FLAG_SECEN; | |
32bad7e3 | 355 | |
e6278d92 PB |
356 | mac802154_print_addr("destination", &hdr.dest); |
357 | mac802154_print_addr("source", &hdr.source); | |
32bad7e3 | 358 | |
ae531b94 PB |
359 | mac_cb(skb)->source = hdr.source; |
360 | mac_cb(skb)->dest = hdr.dest; | |
361 | ||
e6278d92 PB |
362 | if (hdr.fc.security_enabled) { |
363 | u64 key; | |
32bad7e3 | 364 | |
e6278d92 | 365 | pr_debug("seclevel %i\n", hdr.sec.level); |
32bad7e3 | 366 | |
e6278d92 PB |
367 | switch (hdr.sec.key_id_mode) { |
368 | case IEEE802154_SCF_KEY_IMPLICIT: | |
369 | pr_debug("implicit key\n"); | |
370 | break; | |
32bad7e3 | 371 | |
e6278d92 PB |
372 | case IEEE802154_SCF_KEY_INDEX: |
373 | pr_debug("key %02x\n", hdr.sec.key_id); | |
374 | break; | |
32bad7e3 | 375 | |
e6278d92 PB |
376 | case IEEE802154_SCF_KEY_SHORT_INDEX: |
377 | pr_debug("key %04x:%04x %02x\n", | |
378 | le32_to_cpu(hdr.sec.short_src) >> 16, | |
379 | le32_to_cpu(hdr.sec.short_src) & 0xffff, | |
380 | hdr.sec.key_id); | |
381 | break; | |
32bad7e3 | 382 | |
e6278d92 PB |
383 | case IEEE802154_SCF_KEY_HW_INDEX: |
384 | key = swab64((__force u64) hdr.sec.extended_src); | |
385 | pr_debug("key source %8phC %02x\n", &key, | |
386 | hdr.sec.key_id); | |
387 | break; | |
32bad7e3 | 388 | } |
e6278d92 PB |
389 | |
390 | return -EINVAL; | |
32bad7e3 | 391 | } |
392 | ||
393 | return 0; | |
32bad7e3 | 394 | } |
395 | ||
396 | void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb) | |
397 | { | |
398 | int ret; | |
399 | struct sk_buff *sskb; | |
400 | struct mac802154_sub_if_data *sdata; | |
401 | ||
402 | ret = mac802154_parse_frame_start(skb); | |
403 | if (ret) { | |
404 | pr_debug("got invalid frame\n"); | |
405 | return; | |
406 | } | |
407 | ||
408 | rcu_read_lock(); | |
409 | list_for_each_entry_rcu(sdata, &priv->slaves, list) { | |
410 | if (sdata->type != IEEE802154_DEV_WPAN) | |
411 | continue; | |
412 | ||
413 | sskb = skb_clone(skb, GFP_ATOMIC); | |
414 | if (sskb) | |
415 | mac802154_subif_frame(sdata, sskb); | |
416 | } | |
417 | rcu_read_unlock(); | |
418 | } |