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 enum ieee802154_frame_version {
129 IEEE802154_2003_STD,
130 IEEE802154_2006_STD,
131 IEEE802154_STD,
132 IEEE802154_RESERVED_STD,
133 IEEE802154_MULTIPURPOSE_STD = IEEE802154_2003_STD,
134 };
135
136 enum ieee802154_addressing_mode {
137 IEEE802154_NO_ADDRESSING,
138 IEEE802154_RESERVED,
139 IEEE802154_SHORT_ADDRESSING,
140 IEEE802154_EXTENDED_ADDRESSING,
141 };
142
143 struct ieee802154_hdr {
144 struct ieee802154_hdr_fc fc;
145 u8 seq;
146 struct ieee802154_addr source;
147 struct ieee802154_addr dest;
148 struct ieee802154_sechdr sec;
149 };
150
151 struct ieee802154_beacon_frame {
152 struct ieee802154_hdr mhr;
153 struct ieee802154_beacon_hdr mac_pl;
154 };
155
156 struct ieee802154_mac_cmd_frame {
157 struct ieee802154_hdr mhr;
158 struct ieee802154_mac_cmd_pl mac_pl;
159 };
160
161 struct ieee802154_beacon_req_frame {
162 struct ieee802154_hdr mhr;
163 struct ieee802154_mac_cmd_pl mac_pl;
164 };
165
166 /* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
167 * the contents of hdr will be, and the actual value of those bits in
168 * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
169 * version, if SECEN is set.
170 */
171 int ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr);
172
173 /* pulls the entire 802.15.4 header off of the skb, including the security
174 * header, and performs pan id decompression
175 */
176 int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
177
178 /* parses the frame control, sequence number of address fields in a given skb
179 * and stores them into hdr, performing pan id decompression and length checks
180 * to be suitable for use in header_ops.parse
181 */
182 int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
183 struct ieee802154_hdr *hdr);
184
185 /* parses the full 802.15.4 header a given skb and stores them into hdr,
186 * performing pan id decompression and length checks to be suitable for use in
187 * header_ops.parse
188 */
189 int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
190
191 /* pushes/pulls various frame types into/from an skb */
192 int ieee802154_beacon_push(struct sk_buff *skb,
193 struct ieee802154_beacon_frame *beacon);
194 int ieee802154_mac_cmd_push(struct sk_buff *skb, void *frame,
195 const void *pl, unsigned int pl_len);
196 int ieee802154_mac_cmd_pl_pull(struct sk_buff *skb,
197 struct ieee802154_mac_cmd_pl *mac_pl);
198
199 int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
200
201 static inline int
ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr * sec)202 ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec)
203 {
204 switch (sec->level) {
205 case IEEE802154_SCF_SECLEVEL_MIC32:
206 case IEEE802154_SCF_SECLEVEL_ENC_MIC32:
207 return 4;
208 case IEEE802154_SCF_SECLEVEL_MIC64:
209 case IEEE802154_SCF_SECLEVEL_ENC_MIC64:
210 return 8;
211 case IEEE802154_SCF_SECLEVEL_MIC128:
212 case IEEE802154_SCF_SECLEVEL_ENC_MIC128:
213 return 16;
214 case IEEE802154_SCF_SECLEVEL_NONE:
215 case IEEE802154_SCF_SECLEVEL_ENC:
216 default:
217 return 0;
218 }
219 }
220
ieee802154_hdr_length(struct sk_buff * skb)221 static inline int ieee802154_hdr_length(struct sk_buff *skb)
222 {
223 struct ieee802154_hdr hdr;
224 int len = ieee802154_hdr_pull(skb, &hdr);
225
226 if (len > 0)
227 skb_push(skb, len);
228
229 return len;
230 }
231
ieee802154_addr_equal(const struct ieee802154_addr * a1,const struct ieee802154_addr * a2)232 static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
233 const struct ieee802154_addr *a2)
234 {
235 if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
236 return false;
237
238 if ((a1->mode == IEEE802154_ADDR_LONG &&
239 a1->extended_addr != a2->extended_addr) ||
240 (a1->mode == IEEE802154_ADDR_SHORT &&
241 a1->short_addr != a2->short_addr))
242 return false;
243
244 return true;
245 }
246
ieee802154_devaddr_from_raw(const void * raw)247 static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
248 {
249 u64 temp;
250
251 memcpy(&temp, raw, IEEE802154_ADDR_LEN);
252 return (__force __le64)swab64(temp);
253 }
254
ieee802154_devaddr_to_raw(void * raw,__le64 addr)255 static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
256 {
257 u64 temp = swab64((__force u64)addr);
258
259 memcpy(raw, &temp, IEEE802154_ADDR_LEN);
260 }
261
262 static inline int
ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 * daddr,int len)263 ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 *daddr, int len)
264 {
265 struct ieee802154_addr_sa *sa;
266 int ret = 0;
267
268 sa = &daddr->addr;
269 if (len < IEEE802154_MIN_NAMELEN)
270 return -EINVAL;
271 switch (sa->addr_type) {
272 case IEEE802154_ADDR_NONE:
273 break;
274 case IEEE802154_ADDR_SHORT:
275 if (len < IEEE802154_NAMELEN_SHORT)
276 ret = -EINVAL;
277 break;
278 case IEEE802154_ADDR_LONG:
279 if (len < IEEE802154_NAMELEN_LONG)
280 ret = -EINVAL;
281 break;
282 default:
283 ret = -EINVAL;
284 break;
285 }
286 return ret;
287 }
288
ieee802154_addr_from_sa(struct ieee802154_addr * a,const struct ieee802154_addr_sa * sa)289 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
290 const struct ieee802154_addr_sa *sa)
291 {
292 a->mode = sa->addr_type;
293 a->pan_id = cpu_to_le16(sa->pan_id);
294
295 switch (a->mode) {
296 case IEEE802154_ADDR_SHORT:
297 a->short_addr = cpu_to_le16(sa->short_addr);
298 break;
299 case IEEE802154_ADDR_LONG:
300 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
301 break;
302 }
303 }
304
ieee802154_addr_to_sa(struct ieee802154_addr_sa * sa,const struct ieee802154_addr * a)305 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
306 const struct ieee802154_addr *a)
307 {
308 sa->addr_type = a->mode;
309 sa->pan_id = le16_to_cpu(a->pan_id);
310
311 switch (a->mode) {
312 case IEEE802154_ADDR_SHORT:
313 sa->short_addr = le16_to_cpu(a->short_addr);
314 break;
315 case IEEE802154_ADDR_LONG:
316 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
317 break;
318 }
319 }
320
321 /*
322 * A control block of skb passed between the ARPHRD_IEEE802154 device
323 * and other stack parts.
324 */
325 struct ieee802154_mac_cb {
326 u8 lqi;
327 u8 type;
328 bool ackreq;
329 bool secen;
330 bool secen_override;
331 u8 seclevel;
332 bool seclevel_override;
333 struct ieee802154_addr source;
334 struct ieee802154_addr dest;
335 };
336
mac_cb(struct sk_buff * skb)337 static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
338 {
339 return (struct ieee802154_mac_cb *)skb->cb;
340 }
341
mac_cb_init(struct sk_buff * skb)342 static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb)
343 {
344 BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb));
345
346 memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb));
347 return mac_cb(skb);
348 }
349
350 enum {
351 IEEE802154_LLSEC_DEVKEY_IGNORE,
352 IEEE802154_LLSEC_DEVKEY_RESTRICT,
353 IEEE802154_LLSEC_DEVKEY_RECORD,
354
355 __IEEE802154_LLSEC_DEVKEY_MAX,
356 };
357
358 #define IEEE802154_MAC_SCAN_ED 0
359 #define IEEE802154_MAC_SCAN_ACTIVE 1
360 #define IEEE802154_MAC_SCAN_PASSIVE 2
361 #define IEEE802154_MAC_SCAN_ORPHAN 3
362
363 struct ieee802154_mac_params {
364 s8 transmit_power;
365 u8 min_be;
366 u8 max_be;
367 u8 csma_retries;
368 s8 frame_retries;
369
370 bool lbt;
371 struct wpan_phy_cca cca;
372 s32 cca_ed_level;
373 };
374
375 struct wpan_phy;
376
377 enum {
378 IEEE802154_LLSEC_PARAM_ENABLED = BIT(0),
379 IEEE802154_LLSEC_PARAM_FRAME_COUNTER = BIT(1),
380 IEEE802154_LLSEC_PARAM_OUT_LEVEL = BIT(2),
381 IEEE802154_LLSEC_PARAM_OUT_KEY = BIT(3),
382 IEEE802154_LLSEC_PARAM_KEY_SOURCE = BIT(4),
383 IEEE802154_LLSEC_PARAM_PAN_ID = BIT(5),
384 IEEE802154_LLSEC_PARAM_HWADDR = BIT(6),
385 IEEE802154_LLSEC_PARAM_COORD_HWADDR = BIT(7),
386 IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = BIT(8),
387 };
388
389 struct ieee802154_llsec_ops {
390 int (*get_params)(struct net_device *dev,
391 struct ieee802154_llsec_params *params);
392 int (*set_params)(struct net_device *dev,
393 const struct ieee802154_llsec_params *params,
394 int changed);
395
396 int (*add_key)(struct net_device *dev,
397 const struct ieee802154_llsec_key_id *id,
398 const struct ieee802154_llsec_key *key);
399 int (*del_key)(struct net_device *dev,
400 const struct ieee802154_llsec_key_id *id);
401
402 int (*add_dev)(struct net_device *dev,
403 const struct ieee802154_llsec_device *llsec_dev);
404 int (*del_dev)(struct net_device *dev, __le64 dev_addr);
405
406 int (*add_devkey)(struct net_device *dev,
407 __le64 device_addr,
408 const struct ieee802154_llsec_device_key *key);
409 int (*del_devkey)(struct net_device *dev,
410 __le64 device_addr,
411 const struct ieee802154_llsec_device_key *key);
412
413 int (*add_seclevel)(struct net_device *dev,
414 const struct ieee802154_llsec_seclevel *sl);
415 int (*del_seclevel)(struct net_device *dev,
416 const struct ieee802154_llsec_seclevel *sl);
417
418 void (*lock_table)(struct net_device *dev);
419 void (*get_table)(struct net_device *dev,
420 struct ieee802154_llsec_table **t);
421 void (*unlock_table)(struct net_device *dev);
422 };
423 /*
424 * This should be located at net_device->ml_priv
425 *
426 * get_phy should increment the reference counting on returned phy.
427 * Use wpan_wpy_put to put that reference.
428 */
429 struct ieee802154_mlme_ops {
430 /* The following fields are optional (can be NULL). */
431
432 int (*assoc_req)(struct net_device *dev,
433 struct ieee802154_addr *addr,
434 u8 channel, u8 page, u8 cap);
435 int (*assoc_resp)(struct net_device *dev,
436 struct ieee802154_addr *addr,
437 __le16 short_addr, u8 status);
438 int (*disassoc_req)(struct net_device *dev,
439 struct ieee802154_addr *addr,
440 u8 reason);
441 int (*start_req)(struct net_device *dev,
442 struct ieee802154_addr *addr,
443 u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
444 u8 pan_coord, u8 blx, u8 coord_realign);
445 int (*scan_req)(struct net_device *dev,
446 u8 type, u32 channels, u8 page, u8 duration);
447
448 int (*set_mac_params)(struct net_device *dev,
449 const struct ieee802154_mac_params *params);
450 void (*get_mac_params)(struct net_device *dev,
451 struct ieee802154_mac_params *params);
452
453 const struct ieee802154_llsec_ops *llsec;
454 };
455
456 static inline struct ieee802154_mlme_ops *
ieee802154_mlme_ops(const struct net_device * dev)457 ieee802154_mlme_ops(const struct net_device *dev)
458 {
459 return dev->ml_priv;
460 }
461
462 #endif
463