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linux-stable/include/linux/ieee802154.h
Miquel Raynal 57588c7117 mac802154: Handle passive scanning 
Implement the core hooks in order to provide the softMAC layer support
for passive scans. Scans are requested by the user and can be aborted.

Changing channels manually is prohibited during scans.

The implementation uses a workqueue triggered at a certain interval
depending on the symbol duration for the current channel and the
duration order provided. More advanced drivers with internal scheduling
capabilities might require additional care but there is none mainline
yet.

Received beacons during a passive scan are processed in a work queue and
their result forwarded to the upper layer.

Active scanning is not supported yet.

Co-developed-by: David Girault <david.girault@qorvo.com>
Signed-off-by: David Girault <david.girault@qorvo.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-7-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:48:43 +01:00

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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* IEEE802.15.4-2003 specification
*
* Copyright (C) 2007, 2008 Siemens AG
*
* Written by:
* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
* Maxim Osipov <maxim.osipov@siemens.com>
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
*/
#ifndef LINUX_IEEE802154_H
#define LINUX_IEEE802154_H
#include <linux/types.h>
#include <linux/random.h>
#define IEEE802154_MTU 127
#define IEEE802154_ACK_PSDU_LEN 5
#define IEEE802154_MIN_PSDU_LEN 9
#define IEEE802154_FCS_LEN 2
#define IEEE802154_MAX_AUTH_TAG_LEN 16
#define IEEE802154_FC_LEN 2
#define IEEE802154_SEQ_LEN 1
/* General MAC frame format:
* 2 bytes: Frame Control
* 1 byte: Sequence Number
* 20 bytes: Addressing fields
* 14 bytes: Auxiliary Security Header
*/
#define IEEE802154_MAX_HEADER_LEN (2 + 1 + 20 + 14)
#define IEEE802154_MIN_HEADER_LEN (IEEE802154_ACK_PSDU_LEN - \
IEEE802154_FCS_LEN)
#define IEEE802154_PAN_ID_BROADCAST 0xffff
#define IEEE802154_ADDR_SHORT_BROADCAST 0xffff
#define IEEE802154_ADDR_SHORT_UNSPEC 0xfffe
#define IEEE802154_EXTENDED_ADDR_LEN 8
#define IEEE802154_SHORT_ADDR_LEN 2
#define IEEE802154_PAN_ID_LEN 2
/* Duration in superframe order */
#define IEEE802154_MAX_SCAN_DURATION 14
#define IEEE802154_ACTIVE_SCAN_DURATION 15
/* Superframe duration in slots */
#define IEEE802154_SUPERFRAME_PERIOD 16
/* Various periods expressed in symbols */
#define IEEE802154_SLOT_PERIOD 60
#define IEEE802154_LIFS_PERIOD 40
#define IEEE802154_SIFS_PERIOD 12
#define IEEE802154_MAX_SIFS_FRAME_SIZE 18
#define IEEE802154_MAX_CHANNEL 26
#define IEEE802154_MAX_PAGE 31
#define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */
#define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */
#define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */
#define IEEE802154_FC_TYPE_MAC_CMD 0x3 /* Frame is MAC command */
#define IEEE802154_FC_TYPE_SHIFT 0
#define IEEE802154_FC_TYPE_MASK ((1 << 3) - 1)
#define IEEE802154_FC_TYPE(x) ((x & IEEE802154_FC_TYPE_MASK) >> IEEE802154_FC_TYPE_SHIFT)
#define IEEE802154_FC_SET_TYPE(v, x) do { \
v = (((v) & ~IEEE802154_FC_TYPE_MASK) | \
(((x) << IEEE802154_FC_TYPE_SHIFT) & IEEE802154_FC_TYPE_MASK)); \
} while (0)
#define IEEE802154_FC_SECEN_SHIFT 3
#define IEEE802154_FC_SECEN (1 << IEEE802154_FC_SECEN_SHIFT)
#define IEEE802154_FC_FRPEND_SHIFT 4
#define IEEE802154_FC_FRPEND (1 << IEEE802154_FC_FRPEND_SHIFT)
#define IEEE802154_FC_ACK_REQ_SHIFT 5
#define IEEE802154_FC_ACK_REQ (1 << IEEE802154_FC_ACK_REQ_SHIFT)
#define IEEE802154_FC_INTRA_PAN_SHIFT 6
#define IEEE802154_FC_INTRA_PAN (1 << IEEE802154_FC_INTRA_PAN_SHIFT)
#define IEEE802154_FC_SAMODE_SHIFT 14
#define IEEE802154_FC_SAMODE_MASK (3 << IEEE802154_FC_SAMODE_SHIFT)
#define IEEE802154_FC_DAMODE_SHIFT 10
#define IEEE802154_FC_DAMODE_MASK (3 << IEEE802154_FC_DAMODE_SHIFT)
#define IEEE802154_FC_VERSION_SHIFT 12
#define IEEE802154_FC_VERSION_MASK (3 << IEEE802154_FC_VERSION_SHIFT)
#define IEEE802154_FC_VERSION(x) ((x & IEEE802154_FC_VERSION_MASK) >> IEEE802154_FC_VERSION_SHIFT)
#define IEEE802154_FC_SAMODE(x) \
(((x) & IEEE802154_FC_SAMODE_MASK) >> IEEE802154_FC_SAMODE_SHIFT)
#define IEEE802154_FC_DAMODE(x) \
(((x) & IEEE802154_FC_DAMODE_MASK) >> IEEE802154_FC_DAMODE_SHIFT)
#define IEEE802154_SCF_SECLEVEL_MASK 7
#define IEEE802154_SCF_SECLEVEL_SHIFT 0
#define IEEE802154_SCF_SECLEVEL(x) (x & IEEE802154_SCF_SECLEVEL_MASK)
#define IEEE802154_SCF_KEY_ID_MODE_SHIFT 3
#define IEEE802154_SCF_KEY_ID_MODE_MASK (3 << IEEE802154_SCF_KEY_ID_MODE_SHIFT)
#define IEEE802154_SCF_KEY_ID_MODE(x) \
((x & IEEE802154_SCF_KEY_ID_MODE_MASK) >> IEEE802154_SCF_KEY_ID_MODE_SHIFT)
#define IEEE802154_SCF_KEY_IMPLICIT 0
#define IEEE802154_SCF_KEY_INDEX 1
#define IEEE802154_SCF_KEY_SHORT_INDEX 2
#define IEEE802154_SCF_KEY_HW_INDEX 3
#define IEEE802154_SCF_SECLEVEL_NONE 0
#define IEEE802154_SCF_SECLEVEL_MIC32 1
#define IEEE802154_SCF_SECLEVEL_MIC64 2
#define IEEE802154_SCF_SECLEVEL_MIC128 3
#define IEEE802154_SCF_SECLEVEL_ENC 4
#define IEEE802154_SCF_SECLEVEL_ENC_MIC32 5
#define IEEE802154_SCF_SECLEVEL_ENC_MIC64 6
#define IEEE802154_SCF_SECLEVEL_ENC_MIC128 7
/* MAC footer size */
#define IEEE802154_MFR_SIZE 2 /* 2 octets */
/* MAC's Command Frames Identifiers */
#define IEEE802154_CMD_ASSOCIATION_REQ 0x01
#define IEEE802154_CMD_ASSOCIATION_RESP 0x02
#define IEEE802154_CMD_DISASSOCIATION_NOTIFY 0x03
#define IEEE802154_CMD_DATA_REQ 0x04
#define IEEE802154_CMD_PANID_CONFLICT_NOTIFY 0x05
#define IEEE802154_CMD_ORPHAN_NOTIFY 0x06
#define IEEE802154_CMD_BEACON_REQ 0x07
#define IEEE802154_CMD_COORD_REALIGN_NOTIFY 0x08
#define IEEE802154_CMD_GTS_REQ 0x09
/*
* The return values of MAC operations
*/
enum {
/*
* The requested operation was completed successfully.
* For a transmission request, this value indicates
* a successful transmission.
*/
IEEE802154_SUCCESS = 0x0,
/* The requested operation failed. */
IEEE802154_MAC_ERROR = 0x1,
/* The requested operation has been cancelled. */
IEEE802154_CANCELLED = 0x2,
/*
* Device is ready to poll the coordinator for data in a non beacon
* enabled PAN.
*/
IEEE802154_READY_FOR_POLL = 0x3,
/* Wrong frame counter. */
IEEE802154_COUNTER_ERROR = 0xdb,
/*
* The frame does not conforms to the incoming key usage policy checking
* procedure.
*/
IEEE802154_IMPROPER_KEY_TYPE = 0xdc,
/*
* The frame does not conforms to the incoming security level usage
* policy checking procedure.
*/
IEEE802154_IMPROPER_SECURITY_LEVEL = 0xdd,
/* Secured frame received with an empty Frame Version field. */
IEEE802154_UNSUPPORTED_LEGACY = 0xde,
/*
* A secured frame is received or must be sent but security is not
* enabled in the device. Or, the Auxiliary Security Header has security
* level of zero in it.
*/
IEEE802154_UNSUPPORTED_SECURITY = 0xdf,
/* The beacon was lost following a synchronization request. */
IEEE802154_BEACON_LOST = 0xe0,
/*
* A transmission could not take place due to activity on the
* channel, i.e., the CSMA-CA mechanism has failed.
*/
IEEE802154_CHANNEL_ACCESS_FAILURE = 0xe1,
/* The GTS request has been denied by the PAN coordinator. */
IEEE802154_DENIED = 0xe2,
/* The attempt to disable the transceiver has failed. */
IEEE802154_DISABLE_TRX_FAILURE = 0xe3,
/*
* The received frame induces a failed security check according to
* the security suite.
*/
IEEE802154_FAILED_SECURITY_CHECK = 0xe4,
/*
* The frame resulting from secure processing has a length that is
* greater than aMACMaxFrameSize.
*/
IEEE802154_FRAME_TOO_LONG = 0xe5,
/*
* The requested GTS transmission failed because the specified GTS
* either did not have a transmit GTS direction or was not defined.
*/
IEEE802154_INVALID_GTS = 0xe6,
/*
* A request to purge an MSDU from the transaction queue was made using
* an MSDU handle that was not found in the transaction table.
*/
IEEE802154_INVALID_HANDLE = 0xe7,
/* A parameter in the primitive is out of the valid range.*/
IEEE802154_INVALID_PARAMETER = 0xe8,
/* No acknowledgment was received after aMaxFrameRetries. */
IEEE802154_NO_ACK = 0xe9,
/* A scan operation failed to find any network beacons.*/
IEEE802154_NO_BEACON = 0xea,
/* No response data were available following a request. */
IEEE802154_NO_DATA = 0xeb,
/* The operation failed because a short address was not allocated. */
IEEE802154_NO_SHORT_ADDRESS = 0xec,
/*
* A receiver enable request was unsuccessful because it could not be
* completed within the CAP.
*/
IEEE802154_OUT_OF_CAP = 0xed,
/*
* A PAN identifier conflict has been detected and communicated to the
* PAN coordinator.
*/
IEEE802154_PAN_ID_CONFLICT = 0xee,
/* A coordinator realignment command has been received. */
IEEE802154_REALIGNMENT = 0xef,
/* The transaction has expired and its information discarded. */
IEEE802154_TRANSACTION_EXPIRED = 0xf0,
/* There is no capacity to store the transaction. */
IEEE802154_TRANSACTION_OVERFLOW = 0xf1,
/*
* The transceiver was in the transmitter enabled state when the
* receiver was requested to be enabled.
*/
IEEE802154_TX_ACTIVE = 0xf2,
/* The appropriate key is not available in the ACL. */
IEEE802154_UNAVAILABLE_KEY = 0xf3,
/*
* A SET/GET request was issued with the identifier of a PIB attribute
* that is not supported.
*/
IEEE802154_UNSUPPORTED_ATTRIBUTE = 0xf4,
/* Missing source or destination address or address mode. */
IEEE802154_INVALID_ADDRESS = 0xf5,
/*
* MLME asked to turn the receiver on, but the on time duration is too
* big compared to the macBeaconOrder.
*/
IEEE802154_ON_TIME_TOO_LONG = 0xf6,
/*
* MLME asaked to turn the receiver on, but the request was delayed for
* too long before getting processed.
*/
IEEE802154_PAST_TIME = 0xf7,
/*
* The StartTime parameter is nonzero, and the MLME is not currently
* tracking the beacon of the coordinator through which it is
* associated.
*/
IEEE802154_TRACKING_OFF = 0xf8,
/*
* The index inside the hierarchical values in PIBAttribute is out of
* range.
*/
IEEE802154_INVALID_INDEX = 0xf9,
/*
* The number of PAN descriptors discovered during a scan has been
* reached.
*/
IEEE802154_LIMIT_REACHED = 0xfa,
/*
* The PIBAttribute parameter specifies an attribute that is a read-only
* attribute.
*/
IEEE802154_READ_ONLY = 0xfb,
/*
* A request to perform a scan operation failed because the MLME was
* in the process of performing a previously initiated scan operation.
*/
IEEE802154_SCAN_IN_PROGRESS = 0xfc,
/* The outgoing superframe overlaps the incoming superframe. */
IEEE802154_SUPERFRAME_OVERLAP = 0xfd,
/* Any other error situation. */
IEEE802154_SYSTEM_ERROR = 0xff,
};
/**
* enum ieee802154_filtering_level - Filtering levels applicable to a PHY
*
* @IEEE802154_FILTERING_NONE: No filtering at all, what is received is
* forwarded to the softMAC
* @IEEE802154_FILTERING_1_FCS: First filtering level, frames with an invalid
* FCS should be dropped
* @IEEE802154_FILTERING_2_PROMISCUOUS: Second filtering level, promiscuous
* mode as described in the spec, identical in terms of filtering to the
* level one on PHY side, but at the MAC level the frame should be
* forwarded to the upper layer directly
* @IEEE802154_FILTERING_3_SCAN: Third filtering level, scan related, where
* only beacons must be processed, all remaining traffic gets dropped
* @IEEE802154_FILTERING_4_FRAME_FIELDS: Fourth filtering level actually
* enforcing the validity of the content of the frame with various checks
*/
enum ieee802154_filtering_level {
IEEE802154_FILTERING_NONE,
IEEE802154_FILTERING_1_FCS,
IEEE802154_FILTERING_2_PROMISCUOUS,
IEEE802154_FILTERING_3_SCAN,
IEEE802154_FILTERING_4_FRAME_FIELDS,
};
/* frame control handling */
#define IEEE802154_FCTL_FTYPE 0x0003
#define IEEE802154_FCTL_ACKREQ 0x0020
#define IEEE802154_FCTL_SECEN 0x0004
#define IEEE802154_FCTL_INTRA_PAN 0x0040
#define IEEE802154_FCTL_DADDR 0x0c00
#define IEEE802154_FCTL_SADDR 0xc000
#define IEEE802154_FTYPE_DATA 0x0001
#define IEEE802154_FCTL_ADDR_NONE 0x0000
#define IEEE802154_FCTL_DADDR_SHORT 0x0800
#define IEEE802154_FCTL_DADDR_EXTENDED 0x0c00
#define IEEE802154_FCTL_SADDR_SHORT 0x8000
#define IEEE802154_FCTL_SADDR_EXTENDED 0xc000
/*
* ieee802154_is_data - check if type is IEEE802154_FTYPE_DATA
* @fc: frame control bytes in little-endian byteorder
*/
static inline int ieee802154_is_data(__le16 fc)
{
return (fc & cpu_to_le16(IEEE802154_FCTL_FTYPE)) ==
cpu_to_le16(IEEE802154_FTYPE_DATA);
}
/**
* ieee802154_is_secen - check if Security bit is set
* @fc: frame control bytes in little-endian byteorder
*/
static inline bool ieee802154_is_secen(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_SECEN);
}
/**
* ieee802154_is_ackreq - check if acknowledgment request bit is set
* @fc: frame control bytes in little-endian byteorder
*/
static inline bool ieee802154_is_ackreq(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_ACKREQ);
}
/**
* ieee802154_is_intra_pan - check if intra pan id communication
* @fc: frame control bytes in little-endian byteorder
*/
static inline bool ieee802154_is_intra_pan(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_INTRA_PAN);
}
/*
* ieee802154_daddr_mode - get daddr mode from fc
* @fc: frame control bytes in little-endian byteorder
*/
static inline __le16 ieee802154_daddr_mode(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_DADDR);
}
/*
* ieee802154_saddr_mode - get saddr mode from fc
* @fc: frame control bytes in little-endian byteorder
*/
static inline __le16 ieee802154_saddr_mode(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_SADDR);
}
/**
* ieee802154_is_valid_psdu_len - check if psdu len is valid
* available lengths:
* 0-4 Reserved
* 5 MPDU (Acknowledgment)
* 6-8 Reserved
* 9-127 MPDU
*
* @len: psdu len with (MHR + payload + MFR)
*/
static inline bool ieee802154_is_valid_psdu_len(u8 len)
{
return (len == IEEE802154_ACK_PSDU_LEN ||
(len >= IEEE802154_MIN_PSDU_LEN && len <= IEEE802154_MTU));
}
/**
* ieee802154_is_valid_extended_unicast_addr - check if extended addr is valid
* @addr: extended addr to check
*/
static inline bool ieee802154_is_valid_extended_unicast_addr(__le64 addr)
{
/* Bail out if the address is all zero, or if the group
* address bit is set.
*/
return ((addr != cpu_to_le64(0x0000000000000000ULL)) &&
!(addr & cpu_to_le64(0x0100000000000000ULL)));
}
/**
* ieee802154_is_broadcast_short_addr - check if short addr is broadcast
* @addr: short addr to check
*/
static inline bool ieee802154_is_broadcast_short_addr(__le16 addr)
{
return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST));
}
/**
* ieee802154_is_unspec_short_addr - check if short addr is unspecified
* @addr: short addr to check
*/
static inline bool ieee802154_is_unspec_short_addr(__le16 addr)
{
return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC));
}
/**
* ieee802154_is_valid_src_short_addr - check if source short address is valid
* @addr: short addr to check
*/
static inline bool ieee802154_is_valid_src_short_addr(__le16 addr)
{
return !(ieee802154_is_broadcast_short_addr(addr) ||
ieee802154_is_unspec_short_addr(addr));
}
/**
* ieee802154_random_extended_addr - generates a random extended address
* @addr: extended addr pointer to place the random address
*/
static inline void ieee802154_random_extended_addr(__le64 *addr)
{
get_random_bytes(addr, IEEE802154_EXTENDED_ADDR_LEN);
/* clear the group bit, and set the locally administered bit */
((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] &= ~0x01;
((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] |= 0x02;
}
#endif /* LINUX_IEEE802154_H */
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