include/linux/ieee802154.h

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