1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * IEEE802.15.4-2003 specification
4 *
5 * Copyright (C) 2007, 2008 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 LINUX_IEEE802154_H
16 #define LINUX_IEEE802154_H
17
18 #include <linux/types.h>
19 #include <linux/random.h>
20
21 #define IEEE802154_MTU 127
22 #define IEEE802154_ACK_PSDU_LEN 5
23 #define IEEE802154_MIN_PSDU_LEN 9
24 #define IEEE802154_FCS_LEN 2
25 #define IEEE802154_MAX_AUTH_TAG_LEN 16
26 #define IEEE802154_FC_LEN 2
27 #define IEEE802154_SEQ_LEN 1
28
29 /* General MAC frame format:
30 * 2 bytes: Frame Control
31 * 1 byte: Sequence Number
32 * 20 bytes: Addressing fields
33 * 14 bytes: Auxiliary Security Header
34 */
35 #define IEEE802154_MAX_HEADER_LEN (2 + 1 + 20 + 14)
36 #define IEEE802154_MIN_HEADER_LEN (IEEE802154_ACK_PSDU_LEN - \
37 IEEE802154_FCS_LEN)
38
39 #define IEEE802154_PAN_ID_BROADCAST 0xffff
40 #define IEEE802154_ADDR_SHORT_BROADCAST 0xffff
41 #define IEEE802154_ADDR_SHORT_UNSPEC 0xfffe
42
43 #define IEEE802154_EXTENDED_ADDR_LEN 8
44 #define IEEE802154_SHORT_ADDR_LEN 2
45 #define IEEE802154_PAN_ID_LEN 2
46
47 #define IEEE802154_LIFS_PERIOD 40
48 #define IEEE802154_SIFS_PERIOD 12
49 #define IEEE802154_MAX_SIFS_FRAME_SIZE 18
50
51 #define IEEE802154_MAX_CHANNEL 26
52 #define IEEE802154_MAX_PAGE 31
53
54 #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */
55 #define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */
56 #define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */
57 #define IEEE802154_FC_TYPE_MAC_CMD 0x3 /* Frame is MAC command */
58
59 #define IEEE802154_FC_TYPE_SHIFT 0
60 #define IEEE802154_FC_TYPE_MASK ((1 << 3) - 1)
61 #define IEEE802154_FC_TYPE(x) ((x & IEEE802154_FC_TYPE_MASK) >> IEEE802154_FC_TYPE_SHIFT)
62 #define IEEE802154_FC_SET_TYPE(v, x) do { \
63 v = (((v) & ~IEEE802154_FC_TYPE_MASK) | \
64 (((x) << IEEE802154_FC_TYPE_SHIFT) & IEEE802154_FC_TYPE_MASK)); \
65 } while (0)
66
67 #define IEEE802154_FC_SECEN_SHIFT 3
68 #define IEEE802154_FC_SECEN (1 << IEEE802154_FC_SECEN_SHIFT)
69 #define IEEE802154_FC_FRPEND_SHIFT 4
70 #define IEEE802154_FC_FRPEND (1 << IEEE802154_FC_FRPEND_SHIFT)
71 #define IEEE802154_FC_ACK_REQ_SHIFT 5
72 #define IEEE802154_FC_ACK_REQ (1 << IEEE802154_FC_ACK_REQ_SHIFT)
73 #define IEEE802154_FC_INTRA_PAN_SHIFT 6
74 #define IEEE802154_FC_INTRA_PAN (1 << IEEE802154_FC_INTRA_PAN_SHIFT)
75
76 #define IEEE802154_FC_SAMODE_SHIFT 14
77 #define IEEE802154_FC_SAMODE_MASK (3 << IEEE802154_FC_SAMODE_SHIFT)
78 #define IEEE802154_FC_DAMODE_SHIFT 10
79 #define IEEE802154_FC_DAMODE_MASK (3 << IEEE802154_FC_DAMODE_SHIFT)
80
81 #define IEEE802154_FC_VERSION_SHIFT 12
82 #define IEEE802154_FC_VERSION_MASK (3 << IEEE802154_FC_VERSION_SHIFT)
83 #define IEEE802154_FC_VERSION(x) ((x & IEEE802154_FC_VERSION_MASK) >> IEEE802154_FC_VERSION_SHIFT)
84
85 #define IEEE802154_FC_SAMODE(x) \
86 (((x) & IEEE802154_FC_SAMODE_MASK) >> IEEE802154_FC_SAMODE_SHIFT)
87
88 #define IEEE802154_FC_DAMODE(x) \
89 (((x) & IEEE802154_FC_DAMODE_MASK) >> IEEE802154_FC_DAMODE_SHIFT)
90
91 #define IEEE802154_SCF_SECLEVEL_MASK 7
92 #define IEEE802154_SCF_SECLEVEL_SHIFT 0
93 #define IEEE802154_SCF_SECLEVEL(x) (x & IEEE802154_SCF_SECLEVEL_MASK)
94 #define IEEE802154_SCF_KEY_ID_MODE_SHIFT 3
95 #define IEEE802154_SCF_KEY_ID_MODE_MASK (3 << IEEE802154_SCF_KEY_ID_MODE_SHIFT)
96 #define IEEE802154_SCF_KEY_ID_MODE(x) \
97 ((x & IEEE802154_SCF_KEY_ID_MODE_MASK) >> IEEE802154_SCF_KEY_ID_MODE_SHIFT)
98
99 #define IEEE802154_SCF_KEY_IMPLICIT 0
100 #define IEEE802154_SCF_KEY_INDEX 1
101 #define IEEE802154_SCF_KEY_SHORT_INDEX 2
102 #define IEEE802154_SCF_KEY_HW_INDEX 3
103
104 #define IEEE802154_SCF_SECLEVEL_NONE 0
105 #define IEEE802154_SCF_SECLEVEL_MIC32 1
106 #define IEEE802154_SCF_SECLEVEL_MIC64 2
107 #define IEEE802154_SCF_SECLEVEL_MIC128 3
108 #define IEEE802154_SCF_SECLEVEL_ENC 4
109 #define IEEE802154_SCF_SECLEVEL_ENC_MIC32 5
110 #define IEEE802154_SCF_SECLEVEL_ENC_MIC64 6
111 #define IEEE802154_SCF_SECLEVEL_ENC_MIC128 7
112
113 /* MAC footer size */
114 #define IEEE802154_MFR_SIZE 2 /* 2 octets */
115
116 /* MAC's Command Frames Identifiers */
117 #define IEEE802154_CMD_ASSOCIATION_REQ 0x01
118 #define IEEE802154_CMD_ASSOCIATION_RESP 0x02
119 #define IEEE802154_CMD_DISASSOCIATION_NOTIFY 0x03
120 #define IEEE802154_CMD_DATA_REQ 0x04
121 #define IEEE802154_CMD_PANID_CONFLICT_NOTIFY 0x05
122 #define IEEE802154_CMD_ORPHAN_NOTIFY 0x06
123 #define IEEE802154_CMD_BEACON_REQ 0x07
124 #define IEEE802154_CMD_COORD_REALIGN_NOTIFY 0x08
125 #define IEEE802154_CMD_GTS_REQ 0x09
126
127 /*
128 * The return values of MAC operations
129 */
130 enum {
131 /*
132 * The requested operation was completed successfully.
133 * For a transmission request, this value indicates
134 * a successful transmission.
135 */
136 IEEE802154_SUCCESS = 0x0,
137
138 /* The beacon was lost following a synchronization request. */
139 IEEE802154_BEACON_LOSS = 0xe0,
140 /*
141 * A transmission could not take place due to activity on the
142 * channel, i.e., the CSMA-CA mechanism has failed.
143 */
144 IEEE802154_CHNL_ACCESS_FAIL = 0xe1,
145 /* The GTS request has been denied by the PAN coordinator. */
146 IEEE802154_DENINED = 0xe2,
147 /* The attempt to disable the transceiver has failed. */
148 IEEE802154_DISABLE_TRX_FAIL = 0xe3,
149 /*
150 * The received frame induces a failed security check according to
151 * the security suite.
152 */
153 IEEE802154_FAILED_SECURITY_CHECK = 0xe4,
154 /*
155 * The frame resulting from secure processing has a length that is
156 * greater than aMACMaxFrameSize.
157 */
158 IEEE802154_FRAME_TOO_LONG = 0xe5,
159 /*
160 * The requested GTS transmission failed because the specified GTS
161 * either did not have a transmit GTS direction or was not defined.
162 */
163 IEEE802154_INVALID_GTS = 0xe6,
164 /*
165 * A request to purge an MSDU from the transaction queue was made using
166 * an MSDU handle that was not found in the transaction table.
167 */
168 IEEE802154_INVALID_HANDLE = 0xe7,
169 /* A parameter in the primitive is out of the valid range.*/
170 IEEE802154_INVALID_PARAMETER = 0xe8,
171 /* No acknowledgment was received after aMaxFrameRetries. */
172 IEEE802154_NO_ACK = 0xe9,
173 /* A scan operation failed to find any network beacons.*/
174 IEEE802154_NO_BEACON = 0xea,
175 /* No response data were available following a request. */
176 IEEE802154_NO_DATA = 0xeb,
177 /* The operation failed because a short address was not allocated. */
178 IEEE802154_NO_SHORT_ADDRESS = 0xec,
179 /*
180 * A receiver enable request was unsuccessful because it could not be
181 * completed within the CAP.
182 */
183 IEEE802154_OUT_OF_CAP = 0xed,
184 /*
185 * A PAN identifier conflict has been detected and communicated to the
186 * PAN coordinator.
187 */
188 IEEE802154_PANID_CONFLICT = 0xee,
189 /* A coordinator realignment command has been received. */
190 IEEE802154_REALIGMENT = 0xef,
191 /* The transaction has expired and its information discarded. */
192 IEEE802154_TRANSACTION_EXPIRED = 0xf0,
193 /* There is no capacity to store the transaction. */
194 IEEE802154_TRANSACTION_OVERFLOW = 0xf1,
195 /*
196 * The transceiver was in the transmitter enabled state when the
197 * receiver was requested to be enabled.
198 */
199 IEEE802154_TX_ACTIVE = 0xf2,
200 /* The appropriate key is not available in the ACL. */
201 IEEE802154_UNAVAILABLE_KEY = 0xf3,
202 /*
203 * A SET/GET request was issued with the identifier of a PIB attribute
204 * that is not supported.
205 */
206 IEEE802154_UNSUPPORTED_ATTR = 0xf4,
207 /*
208 * A request to perform a scan operation failed because the MLME was
209 * in the process of performing a previously initiated scan operation.
210 */
211 IEEE802154_SCAN_IN_PROGRESS = 0xfc,
212 };
213
214 /* frame control handling */
215 #define IEEE802154_FCTL_FTYPE 0x0003
216 #define IEEE802154_FCTL_ACKREQ 0x0020
217 #define IEEE802154_FCTL_SECEN 0x0004
218 #define IEEE802154_FCTL_INTRA_PAN 0x0040
219 #define IEEE802154_FCTL_DADDR 0x0c00
220 #define IEEE802154_FCTL_SADDR 0xc000
221
222 #define IEEE802154_FTYPE_DATA 0x0001
223
224 #define IEEE802154_FCTL_ADDR_NONE 0x0000
225 #define IEEE802154_FCTL_DADDR_SHORT 0x0800
226 #define IEEE802154_FCTL_DADDR_EXTENDED 0x0c00
227 #define IEEE802154_FCTL_SADDR_SHORT 0x8000
228 #define IEEE802154_FCTL_SADDR_EXTENDED 0xc000
229
230 /*
231 * ieee802154_is_data - check if type is IEEE802154_FTYPE_DATA
232 * @fc: frame control bytes in little-endian byteorder
233 */
ieee802154_is_data(__le16 fc)234 static inline int ieee802154_is_data(__le16 fc)
235 {
236 return (fc & cpu_to_le16(IEEE802154_FCTL_FTYPE)) ==
237 cpu_to_le16(IEEE802154_FTYPE_DATA);
238 }
239
240 /**
241 * ieee802154_is_secen - check if Security bit is set
242 * @fc: frame control bytes in little-endian byteorder
243 */
ieee802154_is_secen(__le16 fc)244 static inline bool ieee802154_is_secen(__le16 fc)
245 {
246 return fc & cpu_to_le16(IEEE802154_FCTL_SECEN);
247 }
248
249 /**
250 * ieee802154_is_ackreq - check if acknowledgment request bit is set
251 * @fc: frame control bytes in little-endian byteorder
252 */
ieee802154_is_ackreq(__le16 fc)253 static inline bool ieee802154_is_ackreq(__le16 fc)
254 {
255 return fc & cpu_to_le16(IEEE802154_FCTL_ACKREQ);
256 }
257
258 /**
259 * ieee802154_is_intra_pan - check if intra pan id communication
260 * @fc: frame control bytes in little-endian byteorder
261 */
ieee802154_is_intra_pan(__le16 fc)262 static inline bool ieee802154_is_intra_pan(__le16 fc)
263 {
264 return fc & cpu_to_le16(IEEE802154_FCTL_INTRA_PAN);
265 }
266
267 /*
268 * ieee802154_daddr_mode - get daddr mode from fc
269 * @fc: frame control bytes in little-endian byteorder
270 */
ieee802154_daddr_mode(__le16 fc)271 static inline __le16 ieee802154_daddr_mode(__le16 fc)
272 {
273 return fc & cpu_to_le16(IEEE802154_FCTL_DADDR);
274 }
275
276 /*
277 * ieee802154_saddr_mode - get saddr mode from fc
278 * @fc: frame control bytes in little-endian byteorder
279 */
ieee802154_saddr_mode(__le16 fc)280 static inline __le16 ieee802154_saddr_mode(__le16 fc)
281 {
282 return fc & cpu_to_le16(IEEE802154_FCTL_SADDR);
283 }
284
285 /**
286 * ieee802154_is_valid_psdu_len - check if psdu len is valid
287 * available lengths:
288 * 0-4 Reserved
289 * 5 MPDU (Acknowledgment)
290 * 6-8 Reserved
291 * 9-127 MPDU
292 *
293 * @len: psdu len with (MHR + payload + MFR)
294 */
ieee802154_is_valid_psdu_len(u8 len)295 static inline bool ieee802154_is_valid_psdu_len(u8 len)
296 {
297 return (len == IEEE802154_ACK_PSDU_LEN ||
298 (len >= IEEE802154_MIN_PSDU_LEN && len <= IEEE802154_MTU));
299 }
300
301 /**
302 * ieee802154_is_valid_extended_unicast_addr - check if extended addr is valid
303 * @addr: extended addr to check
304 */
ieee802154_is_valid_extended_unicast_addr(__le64 addr)305 static inline bool ieee802154_is_valid_extended_unicast_addr(__le64 addr)
306 {
307 /* Bail out if the address is all zero, or if the group
308 * address bit is set.
309 */
310 return ((addr != cpu_to_le64(0x0000000000000000ULL)) &&
311 !(addr & cpu_to_le64(0x0100000000000000ULL)));
312 }
313
314 /**
315 * ieee802154_is_broadcast_short_addr - check if short addr is broadcast
316 * @addr: short addr to check
317 */
ieee802154_is_broadcast_short_addr(__le16 addr)318 static inline bool ieee802154_is_broadcast_short_addr(__le16 addr)
319 {
320 return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST));
321 }
322
323 /**
324 * ieee802154_is_unspec_short_addr - check if short addr is unspecified
325 * @addr: short addr to check
326 */
ieee802154_is_unspec_short_addr(__le16 addr)327 static inline bool ieee802154_is_unspec_short_addr(__le16 addr)
328 {
329 return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC));
330 }
331
332 /**
333 * ieee802154_is_valid_src_short_addr - check if source short address is valid
334 * @addr: short addr to check
335 */
ieee802154_is_valid_src_short_addr(__le16 addr)336 static inline bool ieee802154_is_valid_src_short_addr(__le16 addr)
337 {
338 return !(ieee802154_is_broadcast_short_addr(addr) ||
339 ieee802154_is_unspec_short_addr(addr));
340 }
341
342 /**
343 * ieee802154_random_extended_addr - generates a random extended address
344 * @addr: extended addr pointer to place the random address
345 */
ieee802154_random_extended_addr(__le64 * addr)346 static inline void ieee802154_random_extended_addr(__le64 *addr)
347 {
348 get_random_bytes(addr, IEEE802154_EXTENDED_ADDR_LEN);
349
350 /* clear the group bit, and set the locally administered bit */
351 ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] &= ~0x01;
352 ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] |= 0x02;
353 }
354
355 #endif /* LINUX_IEEE802154_H */
356
