335 lines
11 KiB
C
335 lines
11 KiB
C
/*
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* IEEE802.15.4-2003 specification
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*
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* Copyright (C) 2007, 2008 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Maxim Osipov <maxim.osipov@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#ifndef LINUX_IEEE802154_H
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#define LINUX_IEEE802154_H
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#include <linux/types.h>
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#include <linux/random.h>
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#define IEEE802154_MTU 127
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#define IEEE802154_ACK_PSDU_LEN 5
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#define IEEE802154_MIN_PSDU_LEN 9
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#define IEEE802154_FCS_LEN 2
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#define IEEE802154_MAX_AUTH_TAG_LEN 16
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/* General MAC frame format:
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* 2 bytes: Frame Control
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* 1 byte: Sequence Number
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* 20 bytes: Addressing fields
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* 14 bytes: Auxiliary Security Header
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*/
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#define IEEE802154_MAX_HEADER_LEN (2 + 1 + 20 + 14)
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#define IEEE802154_MIN_HEADER_LEN (IEEE802154_ACK_PSDU_LEN - \
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IEEE802154_FCS_LEN)
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#define IEEE802154_PAN_ID_BROADCAST 0xffff
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#define IEEE802154_ADDR_SHORT_BROADCAST 0xffff
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#define IEEE802154_ADDR_SHORT_UNSPEC 0xfffe
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#define IEEE802154_EXTENDED_ADDR_LEN 8
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#define IEEE802154_SHORT_ADDR_LEN 2
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#define IEEE802154_LIFS_PERIOD 40
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#define IEEE802154_SIFS_PERIOD 12
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#define IEEE802154_MAX_SIFS_FRAME_SIZE 18
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#define IEEE802154_MAX_CHANNEL 26
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#define IEEE802154_MAX_PAGE 31
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#define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */
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#define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */
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#define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */
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#define IEEE802154_FC_TYPE_MAC_CMD 0x3 /* Frame is MAC command */
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#define IEEE802154_FC_TYPE_SHIFT 0
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#define IEEE802154_FC_TYPE_MASK ((1 << 3) - 1)
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#define IEEE802154_FC_TYPE(x) ((x & IEEE802154_FC_TYPE_MASK) >> IEEE802154_FC_TYPE_SHIFT)
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#define IEEE802154_FC_SET_TYPE(v, x) do { \
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v = (((v) & ~IEEE802154_FC_TYPE_MASK) | \
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(((x) << IEEE802154_FC_TYPE_SHIFT) & IEEE802154_FC_TYPE_MASK)); \
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} while (0)
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#define IEEE802154_FC_SECEN_SHIFT 3
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#define IEEE802154_FC_SECEN (1 << IEEE802154_FC_SECEN_SHIFT)
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#define IEEE802154_FC_FRPEND_SHIFT 4
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#define IEEE802154_FC_FRPEND (1 << IEEE802154_FC_FRPEND_SHIFT)
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#define IEEE802154_FC_ACK_REQ_SHIFT 5
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#define IEEE802154_FC_ACK_REQ (1 << IEEE802154_FC_ACK_REQ_SHIFT)
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#define IEEE802154_FC_INTRA_PAN_SHIFT 6
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#define IEEE802154_FC_INTRA_PAN (1 << IEEE802154_FC_INTRA_PAN_SHIFT)
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#define IEEE802154_FC_SAMODE_SHIFT 14
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#define IEEE802154_FC_SAMODE_MASK (3 << IEEE802154_FC_SAMODE_SHIFT)
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#define IEEE802154_FC_DAMODE_SHIFT 10
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#define IEEE802154_FC_DAMODE_MASK (3 << IEEE802154_FC_DAMODE_SHIFT)
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#define IEEE802154_FC_VERSION_SHIFT 12
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#define IEEE802154_FC_VERSION_MASK (3 << IEEE802154_FC_VERSION_SHIFT)
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#define IEEE802154_FC_VERSION(x) ((x & IEEE802154_FC_VERSION_MASK) >> IEEE802154_FC_VERSION_SHIFT)
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#define IEEE802154_FC_SAMODE(x) \
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(((x) & IEEE802154_FC_SAMODE_MASK) >> IEEE802154_FC_SAMODE_SHIFT)
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#define IEEE802154_FC_DAMODE(x) \
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(((x) & IEEE802154_FC_DAMODE_MASK) >> IEEE802154_FC_DAMODE_SHIFT)
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#define IEEE802154_SCF_SECLEVEL_MASK 7
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#define IEEE802154_SCF_SECLEVEL_SHIFT 0
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#define IEEE802154_SCF_SECLEVEL(x) (x & IEEE802154_SCF_SECLEVEL_MASK)
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#define IEEE802154_SCF_KEY_ID_MODE_SHIFT 3
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#define IEEE802154_SCF_KEY_ID_MODE_MASK (3 << IEEE802154_SCF_KEY_ID_MODE_SHIFT)
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#define IEEE802154_SCF_KEY_ID_MODE(x) \
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((x & IEEE802154_SCF_KEY_ID_MODE_MASK) >> IEEE802154_SCF_KEY_ID_MODE_SHIFT)
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#define IEEE802154_SCF_KEY_IMPLICIT 0
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#define IEEE802154_SCF_KEY_INDEX 1
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#define IEEE802154_SCF_KEY_SHORT_INDEX 2
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#define IEEE802154_SCF_KEY_HW_INDEX 3
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#define IEEE802154_SCF_SECLEVEL_NONE 0
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#define IEEE802154_SCF_SECLEVEL_MIC32 1
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#define IEEE802154_SCF_SECLEVEL_MIC64 2
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#define IEEE802154_SCF_SECLEVEL_MIC128 3
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#define IEEE802154_SCF_SECLEVEL_ENC 4
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#define IEEE802154_SCF_SECLEVEL_ENC_MIC32 5
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#define IEEE802154_SCF_SECLEVEL_ENC_MIC64 6
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#define IEEE802154_SCF_SECLEVEL_ENC_MIC128 7
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/* MAC footer size */
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#define IEEE802154_MFR_SIZE 2 /* 2 octets */
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/* MAC's Command Frames Identifiers */
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#define IEEE802154_CMD_ASSOCIATION_REQ 0x01
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#define IEEE802154_CMD_ASSOCIATION_RESP 0x02
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#define IEEE802154_CMD_DISASSOCIATION_NOTIFY 0x03
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#define IEEE802154_CMD_DATA_REQ 0x04
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#define IEEE802154_CMD_PANID_CONFLICT_NOTIFY 0x05
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#define IEEE802154_CMD_ORPHAN_NOTIFY 0x06
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#define IEEE802154_CMD_BEACON_REQ 0x07
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#define IEEE802154_CMD_COORD_REALIGN_NOTIFY 0x08
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#define IEEE802154_CMD_GTS_REQ 0x09
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/*
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* The return values of MAC operations
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*/
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enum {
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/*
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* The requested operation was completed successfully.
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* For a transmission request, this value indicates
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* a successful transmission.
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*/
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IEEE802154_SUCCESS = 0x0,
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/* The beacon was lost following a synchronization request. */
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IEEE802154_BEACON_LOSS = 0xe0,
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/*
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* A transmission could not take place due to activity on the
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* channel, i.e., the CSMA-CA mechanism has failed.
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*/
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IEEE802154_CHNL_ACCESS_FAIL = 0xe1,
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/* The GTS request has been denied by the PAN coordinator. */
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IEEE802154_DENINED = 0xe2,
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/* The attempt to disable the transceiver has failed. */
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IEEE802154_DISABLE_TRX_FAIL = 0xe3,
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/*
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* The received frame induces a failed security check according to
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* the security suite.
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*/
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IEEE802154_FAILED_SECURITY_CHECK = 0xe4,
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/*
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* The frame resulting from secure processing has a length that is
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* greater than aMACMaxFrameSize.
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*/
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IEEE802154_FRAME_TOO_LONG = 0xe5,
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/*
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* The requested GTS transmission failed because the specified GTS
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* either did not have a transmit GTS direction or was not defined.
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*/
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IEEE802154_INVALID_GTS = 0xe6,
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/*
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* A request to purge an MSDU from the transaction queue was made using
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* an MSDU handle that was not found in the transaction table.
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*/
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IEEE802154_INVALID_HANDLE = 0xe7,
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/* A parameter in the primitive is out of the valid range.*/
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IEEE802154_INVALID_PARAMETER = 0xe8,
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/* No acknowledgment was received after aMaxFrameRetries. */
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IEEE802154_NO_ACK = 0xe9,
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/* A scan operation failed to find any network beacons.*/
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IEEE802154_NO_BEACON = 0xea,
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/* No response data were available following a request. */
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IEEE802154_NO_DATA = 0xeb,
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/* The operation failed because a short address was not allocated. */
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IEEE802154_NO_SHORT_ADDRESS = 0xec,
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/*
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* A receiver enable request was unsuccessful because it could not be
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* completed within the CAP.
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*/
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IEEE802154_OUT_OF_CAP = 0xed,
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/*
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* A PAN identifier conflict has been detected and communicated to the
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* PAN coordinator.
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*/
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IEEE802154_PANID_CONFLICT = 0xee,
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/* A coordinator realignment command has been received. */
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IEEE802154_REALIGMENT = 0xef,
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/* The transaction has expired and its information discarded. */
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IEEE802154_TRANSACTION_EXPIRED = 0xf0,
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/* There is no capacity to store the transaction. */
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IEEE802154_TRANSACTION_OVERFLOW = 0xf1,
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/*
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* The transceiver was in the transmitter enabled state when the
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* receiver was requested to be enabled.
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*/
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IEEE802154_TX_ACTIVE = 0xf2,
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/* The appropriate key is not available in the ACL. */
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IEEE802154_UNAVAILABLE_KEY = 0xf3,
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/*
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* A SET/GET request was issued with the identifier of a PIB attribute
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* that is not supported.
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*/
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IEEE802154_UNSUPPORTED_ATTR = 0xf4,
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/*
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* A request to perform a scan operation failed because the MLME was
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* in the process of performing a previously initiated scan operation.
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*/
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IEEE802154_SCAN_IN_PROGRESS = 0xfc,
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};
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/* frame control handling */
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#define IEEE802154_FCTL_FTYPE 0x0003
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#define IEEE802154_FCTL_ACKREQ 0x0020
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#define IEEE802154_FCTL_SECEN 0x0004
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#define IEEE802154_FCTL_INTRA_PAN 0x0040
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#define IEEE802154_FTYPE_DATA 0x0001
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/*
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* ieee802154_is_data - check if type is IEEE802154_FTYPE_DATA
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* @fc: frame control bytes in little-endian byteorder
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*/
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static inline int ieee802154_is_data(__le16 fc)
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{
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return (fc & cpu_to_le16(IEEE802154_FCTL_FTYPE)) ==
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cpu_to_le16(IEEE802154_FTYPE_DATA);
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}
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/**
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* ieee802154_is_secen - check if Security bit is set
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* @fc: frame control bytes in little-endian byteorder
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*/
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static inline bool ieee802154_is_secen(__le16 fc)
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{
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return fc & cpu_to_le16(IEEE802154_FCTL_SECEN);
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}
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/**
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* ieee802154_is_ackreq - check if acknowledgment request bit is set
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* @fc: frame control bytes in little-endian byteorder
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*/
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static inline bool ieee802154_is_ackreq(__le16 fc)
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{
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return fc & cpu_to_le16(IEEE802154_FCTL_ACKREQ);
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}
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/**
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* ieee802154_is_intra_pan - check if intra pan id communication
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* @fc: frame control bytes in little-endian byteorder
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*/
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static inline bool ieee802154_is_intra_pan(__le16 fc)
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{
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return fc & cpu_to_le16(IEEE802154_FCTL_INTRA_PAN);
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}
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/**
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* ieee802154_is_valid_psdu_len - check if psdu len is valid
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* available lengths:
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* 0-4 Reserved
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* 5 MPDU (Acknowledgment)
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* 6-8 Reserved
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* 9-127 MPDU
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*
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* @len: psdu len with (MHR + payload + MFR)
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*/
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static inline bool ieee802154_is_valid_psdu_len(u8 len)
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{
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return (len == IEEE802154_ACK_PSDU_LEN ||
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(len >= IEEE802154_MIN_PSDU_LEN && len <= IEEE802154_MTU));
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}
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/**
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* ieee802154_is_valid_extended_unicast_addr - check if extended addr is valid
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* @addr: extended addr to check
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*/
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static inline bool ieee802154_is_valid_extended_unicast_addr(__le64 addr)
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{
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/* Bail out if the address is all zero, or if the group
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* address bit is set.
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*/
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return ((addr != cpu_to_le64(0x0000000000000000ULL)) &&
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!(addr & cpu_to_le64(0x0100000000000000ULL)));
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}
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/**
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* ieee802154_is_broadcast_short_addr - check if short addr is broadcast
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* @addr: short addr to check
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*/
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static inline bool ieee802154_is_broadcast_short_addr(__le16 addr)
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{
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return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST));
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}
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/**
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* ieee802154_is_unspec_short_addr - check if short addr is unspecified
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* @addr: short addr to check
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*/
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static inline bool ieee802154_is_unspec_short_addr(__le16 addr)
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{
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return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC));
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}
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/**
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* ieee802154_is_valid_src_short_addr - check if source short address is valid
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* @addr: short addr to check
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*/
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static inline bool ieee802154_is_valid_src_short_addr(__le16 addr)
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{
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return !(ieee802154_is_broadcast_short_addr(addr) ||
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ieee802154_is_unspec_short_addr(addr));
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}
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/**
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* ieee802154_random_extended_addr - generates a random extended address
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* @addr: extended addr pointer to place the random address
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*/
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static inline void ieee802154_random_extended_addr(__le64 *addr)
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{
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get_random_bytes(addr, IEEE802154_EXTENDED_ADDR_LEN);
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/* clear the group bit, and set the locally administered bit */
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((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] &= ~0x01;
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((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] |= 0x02;
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}
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#endif /* LINUX_IEEE802154_H */
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