include/linux/ieee802154.h

   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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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 */