1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * An interface between IEEE802.15.4 device and rest of the kernel.
4 *
5 * Copyright (C) 2007-2012 Siemens AG
6 *
7 * Written by:
8 * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
9 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
10 * Maxim Osipov <maxim.osipov@siemens.com>
11 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
12 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
13 */
14
15 #ifndef IEEE802154_NETDEVICE_H
16 #define IEEE802154_NETDEVICE_H
17
18 #define IEEE802154_REQUIRED_SIZE(struct_type, member) \
19 (offsetof(typeof(struct_type), member) + \
20 sizeof(((typeof(struct_type) *)(NULL))->member))
21
22 #define IEEE802154_ADDR_OFFSET \
23 offsetof(typeof(struct sockaddr_ieee802154), addr)
24
25 #define IEEE802154_MIN_NAMELEN (IEEE802154_ADDR_OFFSET + \
26 IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, addr_type))
27
28 #define IEEE802154_NAMELEN_SHORT (IEEE802154_ADDR_OFFSET + \
29 IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, short_addr))
30
31 #define IEEE802154_NAMELEN_LONG (IEEE802154_ADDR_OFFSET + \
32 IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, hwaddr))
33
34 #include <net/af_ieee802154.h>
35 #include <linux/netdevice.h>
36 #include <linux/skbuff.h>
37 #include <linux/ieee802154.h>
38
39 #include <net/cfg802154.h>
40
41 struct ieee802154_beacon_hdr {
42 #if defined(__LITTLE_ENDIAN_BITFIELD)
43 u16 beacon_order:4,
44 superframe_order:4,
45 final_cap_slot:4,
46 battery_life_ext:1,
47 reserved0:1,
48 pan_coordinator:1,
49 assoc_permit:1;
50 u8 gts_count:3,
51 gts_reserved:4,
52 gts_permit:1;
53 u8 pend_short_addr_count:3,
54 reserved1:1,
55 pend_ext_addr_count:3,
56 reserved2:1;
57 #elif defined(__BIG_ENDIAN_BITFIELD)
58 u16 assoc_permit:1,
59 pan_coordinator:1,
60 reserved0:1,
61 battery_life_ext:1,
62 final_cap_slot:4,
63 superframe_order:4,
64 beacon_order:4;
65 u8 gts_permit:1,
66 gts_reserved:4,
67 gts_count:3;
68 u8 reserved2:1,
69 pend_ext_addr_count:3,
70 reserved1:1,
71 pend_short_addr_count:3;
72 #else
73 #error "Please fix <asm/byteorder.h>"
74 #endif
75 } __packed;
76
77 struct ieee802154_mac_cmd_pl {
78 u8 cmd_id;
79 } __packed;
80
81 struct ieee802154_sechdr {
82 #if defined(__LITTLE_ENDIAN_BITFIELD)
83 u8 level:3,
84 key_id_mode:2,
85 reserved:3;
86 #elif defined(__BIG_ENDIAN_BITFIELD)
87 u8 reserved:3,
88 key_id_mode:2,
89 level:3;
90 #else
91 #error "Please fix <asm/byteorder.h>"
92 #endif
93 u8 key_id;
94 __le32 frame_counter;
95 union {
96 __le32 short_src;
97 __le64 extended_src;
98 };
99 };
100
101 struct ieee802154_hdr_fc {
102 #if defined(__LITTLE_ENDIAN_BITFIELD)
103 u16 type:3,
104 security_enabled:1,
105 frame_pending:1,
106 ack_request:1,
107 intra_pan:1,
108 reserved:3,
109 dest_addr_mode:2,
110 version:2,
111 source_addr_mode:2;
112 #elif defined(__BIG_ENDIAN_BITFIELD)
113 u16 reserved:1,
114 intra_pan:1,
115 ack_request:1,
116 frame_pending:1,
117 security_enabled:1,
118 type:3,
119 source_addr_mode:2,
120 version:2,
121 dest_addr_mode:2,
122 reserved2:2;
123 #else
124 #error "Please fix <asm/byteorder.h>"
125 #endif
126 };
127
128 struct ieee802154_assoc_req_pl {
129 #if defined(__LITTLE_ENDIAN_BITFIELD)
130 u8 reserved1:1,
131 device_type:1,
132 power_source:1,
133 rx_on_when_idle:1,
134 assoc_type:1,
135 reserved2:1,
136 security_cap:1,
137 alloc_addr:1;
138 #elif defined(__BIG_ENDIAN_BITFIELD)
139 u8 alloc_addr:1,
140 security_cap:1,
141 reserved2:1,
142 assoc_type:1,
143 rx_on_when_idle:1,
144 power_source:1,
145 device_type:1,
146 reserved1:1;
147 #else
148 #error "Please fix <asm/byteorder.h>"
149 #endif
150 } __packed;
151
152 struct ieee802154_assoc_resp_pl {
153 __le16 short_addr;
154 u8 status;
155 } __packed;
156
157 enum ieee802154_frame_version {
158 IEEE802154_2003_STD,
159 IEEE802154_2006_STD,
160 IEEE802154_STD,
161 IEEE802154_RESERVED_STD,
162 IEEE802154_MULTIPURPOSE_STD = IEEE802154_2003_STD,
163 };
164
165 enum ieee802154_addressing_mode {
166 IEEE802154_NO_ADDRESSING,
167 IEEE802154_RESERVED,
168 IEEE802154_SHORT_ADDRESSING,
169 IEEE802154_EXTENDED_ADDRESSING,
170 };
171
172 enum ieee802154_association_status {
173 IEEE802154_ASSOCIATION_SUCCESSFUL = 0x00,
174 IEEE802154_PAN_AT_CAPACITY = 0x01,
175 IEEE802154_PAN_ACCESS_DENIED = 0x02,
176 IEEE802154_HOPPING_SEQUENCE_OFFSET_DUP = 0x03,
177 IEEE802154_FAST_ASSOCIATION_SUCCESSFUL = 0x80,
178 };
179
180 enum ieee802154_disassociation_reason {
181 IEEE802154_COORD_WISHES_DEVICE_TO_LEAVE = 0x1,
182 IEEE802154_DEVICE_WISHES_TO_LEAVE = 0x2,
183 };
184
185 struct ieee802154_hdr {
186 struct ieee802154_hdr_fc fc;
187 u8 seq;
188 struct ieee802154_addr source;
189 struct ieee802154_addr dest;
190 struct ieee802154_sechdr sec;
191 };
192
193 struct ieee802154_beacon_frame {
194 struct ieee802154_hdr mhr;
195 struct ieee802154_beacon_hdr mac_pl;
196 };
197
198 struct ieee802154_mac_cmd_frame {
199 struct ieee802154_hdr mhr;
200 struct ieee802154_mac_cmd_pl mac_pl;
201 };
202
203 struct ieee802154_beacon_req_frame {
204 struct ieee802154_hdr mhr;
205 struct ieee802154_mac_cmd_pl mac_pl;
206 };
207
208 struct ieee802154_association_req_frame {
209 struct ieee802154_hdr mhr;
210 struct ieee802154_mac_cmd_pl mac_pl;
211 struct ieee802154_assoc_req_pl assoc_req_pl;
212 };
213
214 struct ieee802154_association_resp_frame {
215 struct ieee802154_hdr mhr;
216 struct ieee802154_mac_cmd_pl mac_pl;
217 struct ieee802154_assoc_resp_pl assoc_resp_pl;
218 };
219
220 struct ieee802154_disassociation_notif_frame {
221 struct ieee802154_hdr mhr;
222 struct ieee802154_mac_cmd_pl mac_pl;
223 u8 disassoc_pl;
224 };
225
226 /* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
227 * the contents of hdr will be, and the actual value of those bits in
228 * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
229 * version, if SECEN is set.
230 */
231 int ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr);
232
233 /* pulls the entire 802.15.4 header off of the skb, including the security
234 * header, and performs pan id decompression
235 */
236 int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
237
238 /* parses the frame control, sequence number of address fields in a given skb
239 * and stores them into hdr, performing pan id decompression and length checks
240 * to be suitable for use in header_ops.parse
241 */
242 int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
243 struct ieee802154_hdr *hdr);
244
245 /* parses the full 802.15.4 header a given skb and stores them into hdr,
246 * performing pan id decompression and length checks to be suitable for use in
247 * header_ops.parse
248 */
249 int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
250
251 /* pushes/pulls various frame types into/from an skb */
252 int ieee802154_beacon_push(struct sk_buff *skb,
253 struct ieee802154_beacon_frame *beacon);
254 int ieee802154_mac_cmd_push(struct sk_buff *skb, void *frame,
255 const void *pl, unsigned int pl_len);
256 int ieee802154_mac_cmd_pl_pull(struct sk_buff *skb,
257 struct ieee802154_mac_cmd_pl *mac_pl);
258
259 int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
260
261 static inline int
ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr * sec)262 ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec)
263 {
264 switch (sec->level) {
265 case IEEE802154_SCF_SECLEVEL_MIC32:
266 case IEEE802154_SCF_SECLEVEL_ENC_MIC32:
267 return 4;
268 case IEEE802154_SCF_SECLEVEL_MIC64:
269 case IEEE802154_SCF_SECLEVEL_ENC_MIC64:
270 return 8;
271 case IEEE802154_SCF_SECLEVEL_MIC128:
272 case IEEE802154_SCF_SECLEVEL_ENC_MIC128:
273 return 16;
274 case IEEE802154_SCF_SECLEVEL_NONE:
275 case IEEE802154_SCF_SECLEVEL_ENC:
276 default:
277 return 0;
278 }
279 }
280
ieee802154_hdr_length(struct sk_buff * skb)281 static inline int ieee802154_hdr_length(struct sk_buff *skb)
282 {
283 struct ieee802154_hdr hdr;
284 int len = ieee802154_hdr_pull(skb, &hdr);
285
286 if (len > 0)
287 skb_push(skb, len);
288
289 return len;
290 }
291
ieee802154_addr_equal(const struct ieee802154_addr * a1,const struct ieee802154_addr * a2)292 static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
293 const struct ieee802154_addr *a2)
294 {
295 if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
296 return false;
297
298 if ((a1->mode == IEEE802154_ADDR_LONG &&
299 a1->extended_addr != a2->extended_addr) ||
300 (a1->mode == IEEE802154_ADDR_SHORT &&
301 a1->short_addr != a2->short_addr))
302 return false;
303
304 return true;
305 }
306
ieee802154_devaddr_from_raw(const void * raw)307 static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
308 {
309 u64 temp;
310
311 memcpy(&temp, raw, IEEE802154_ADDR_LEN);
312 return (__force __le64)swab64(temp);
313 }
314
ieee802154_devaddr_to_raw(void * raw,__le64 addr)315 static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
316 {
317 u64 temp = swab64((__force u64)addr);
318
319 memcpy(raw, &temp, IEEE802154_ADDR_LEN);
320 }
321
322 static inline int
ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 * daddr,int len)323 ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 *daddr, int len)
324 {
325 struct ieee802154_addr_sa *sa;
326 int ret = 0;
327
328 sa = &daddr->addr;
329 if (len < IEEE802154_MIN_NAMELEN)
330 return -EINVAL;
331 switch (sa->addr_type) {
332 case IEEE802154_ADDR_NONE:
333 break;
334 case IEEE802154_ADDR_SHORT:
335 if (len < IEEE802154_NAMELEN_SHORT)
336 ret = -EINVAL;
337 break;
338 case IEEE802154_ADDR_LONG:
339 if (len < IEEE802154_NAMELEN_LONG)
340 ret = -EINVAL;
341 break;
342 default:
343 ret = -EINVAL;
344 break;
345 }
346 return ret;
347 }
348
ieee802154_addr_from_sa(struct ieee802154_addr * a,const struct ieee802154_addr_sa * sa)349 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
350 const struct ieee802154_addr_sa *sa)
351 {
352 a->mode = sa->addr_type;
353 a->pan_id = cpu_to_le16(sa->pan_id);
354
355 switch (a->mode) {
356 case IEEE802154_ADDR_SHORT:
357 a->short_addr = cpu_to_le16(sa->short_addr);
358 break;
359 case IEEE802154_ADDR_LONG:
360 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
361 break;
362 }
363 }
364
ieee802154_addr_to_sa(struct ieee802154_addr_sa * sa,const struct ieee802154_addr * a)365 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
366 const struct ieee802154_addr *a)
367 {
368 sa->addr_type = a->mode;
369 sa->pan_id = le16_to_cpu(a->pan_id);
370
371 switch (a->mode) {
372 case IEEE802154_ADDR_SHORT:
373 sa->short_addr = le16_to_cpu(a->short_addr);
374 break;
375 case IEEE802154_ADDR_LONG:
376 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
377 break;
378 }
379 }
380
381 /*
382 * A control block of skb passed between the ARPHRD_IEEE802154 device
383 * and other stack parts.
384 */
385 struct ieee802154_mac_cb {
386 u8 lqi;
387 u8 type;
388 bool ackreq;
389 bool secen;
390 bool secen_override;
391 u8 seclevel;
392 bool seclevel_override;
393 struct ieee802154_addr source;
394 struct ieee802154_addr dest;
395 };
396
mac_cb(struct sk_buff * skb)397 static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
398 {
399 return (struct ieee802154_mac_cb *)skb->cb;
400 }
401
mac_cb_init(struct sk_buff * skb)402 static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb)
403 {
404 BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb));
405
406 memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb));
407 return mac_cb(skb);
408 }
409
410 enum {
411 IEEE802154_LLSEC_DEVKEY_IGNORE,
412 IEEE802154_LLSEC_DEVKEY_RESTRICT,
413 IEEE802154_LLSEC_DEVKEY_RECORD,
414
415 __IEEE802154_LLSEC_DEVKEY_MAX,
416 };
417
418 #define IEEE802154_MAC_SCAN_ED 0
419 #define IEEE802154_MAC_SCAN_ACTIVE 1
420 #define IEEE802154_MAC_SCAN_PASSIVE 2
421 #define IEEE802154_MAC_SCAN_ORPHAN 3
422
423 struct ieee802154_mac_params {
424 s8 transmit_power;
425 u8 min_be;
426 u8 max_be;
427 u8 csma_retries;
428 s8 frame_retries;
429
430 bool lbt;
431 struct wpan_phy_cca cca;
432 s32 cca_ed_level;
433 };
434
435 struct wpan_phy;
436
437 enum {
438 IEEE802154_LLSEC_PARAM_ENABLED = BIT(0),
439 IEEE802154_LLSEC_PARAM_FRAME_COUNTER = BIT(1),
440 IEEE802154_LLSEC_PARAM_OUT_LEVEL = BIT(2),
441 IEEE802154_LLSEC_PARAM_OUT_KEY = BIT(3),
442 IEEE802154_LLSEC_PARAM_KEY_SOURCE = BIT(4),
443 IEEE802154_LLSEC_PARAM_PAN_ID = BIT(5),
444 IEEE802154_LLSEC_PARAM_HWADDR = BIT(6),
445 IEEE802154_LLSEC_PARAM_COORD_HWADDR = BIT(7),
446 IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = BIT(8),
447 };
448
449 struct ieee802154_llsec_ops {
450 int (*get_params)(struct net_device *dev,
451 struct ieee802154_llsec_params *params);
452 int (*set_params)(struct net_device *dev,
453 const struct ieee802154_llsec_params *params,
454 int changed);
455
456 int (*add_key)(struct net_device *dev,
457 const struct ieee802154_llsec_key_id *id,
458 const struct ieee802154_llsec_key *key);
459 int (*del_key)(struct net_device *dev,
460 const struct ieee802154_llsec_key_id *id);
461
462 int (*add_dev)(struct net_device *dev,
463 const struct ieee802154_llsec_device *llsec_dev);
464 int (*del_dev)(struct net_device *dev, __le64 dev_addr);
465
466 int (*add_devkey)(struct net_device *dev,
467 __le64 device_addr,
468 const struct ieee802154_llsec_device_key *key);
469 int (*del_devkey)(struct net_device *dev,
470 __le64 device_addr,
471 const struct ieee802154_llsec_device_key *key);
472
473 int (*add_seclevel)(struct net_device *dev,
474 const struct ieee802154_llsec_seclevel *sl);
475 int (*del_seclevel)(struct net_device *dev,
476 const struct ieee802154_llsec_seclevel *sl);
477
478 void (*lock_table)(struct net_device *dev);
479 void (*get_table)(struct net_device *dev,
480 struct ieee802154_llsec_table **t);
481 void (*unlock_table)(struct net_device *dev);
482 };
483 /*
484 * This should be located at net_device->ml_priv
485 *
486 * get_phy should increment the reference counting on returned phy.
487 * Use wpan_wpy_put to put that reference.
488 */
489 struct ieee802154_mlme_ops {
490 /* The following fields are optional (can be NULL). */
491
492 int (*assoc_req)(struct net_device *dev,
493 struct ieee802154_addr *addr,
494 u8 channel, u8 page, u8 cap);
495 int (*assoc_resp)(struct net_device *dev,
496 struct ieee802154_addr *addr,
497 __le16 short_addr, u8 status);
498 int (*disassoc_req)(struct net_device *dev,
499 struct ieee802154_addr *addr,
500 u8 reason);
501 int (*start_req)(struct net_device *dev,
502 struct ieee802154_addr *addr,
503 u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
504 u8 pan_coord, u8 blx, u8 coord_realign);
505 int (*scan_req)(struct net_device *dev,
506 u8 type, u32 channels, u8 page, u8 duration);
507
508 int (*set_mac_params)(struct net_device *dev,
509 const struct ieee802154_mac_params *params);
510 void (*get_mac_params)(struct net_device *dev,
511 struct ieee802154_mac_params *params);
512
513 const struct ieee802154_llsec_ops *llsec;
514 };
515
516 static inline struct ieee802154_mlme_ops *
ieee802154_mlme_ops(const struct net_device * dev)517 ieee802154_mlme_ops(const struct net_device *dev)
518 {
519 return dev->ml_priv;
520 }
521
522 #endif
523