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linux-next/include/linux/ieee802154.h
Alexander Aring 19580cc1ed ieee802154: add ieee802154_skb_src_pan helper 
This patch adds ieee802154_skb_src_pan function to get the pointer
address of the source pan id at skb mac pointer.

Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-07-08 13:23:12 +02:00

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/*
* IEEE802.15.4-2003 specification
*
* Copyright (C) 2007, 2008 Siemens AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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
#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 beacon was lost following a synchronization request. */
IEEE802154_BEACON_LOSS = 0xe0,
/*
* A transmission could not take place due to activity on the
* channel, i.e., the CSMA-CA mechanism has failed.
*/
IEEE802154_CHNL_ACCESS_FAIL = 0xe1,
/* The GTS request has been denied by the PAN coordinator. */
IEEE802154_DENINED = 0xe2,
/* The attempt to disable the transceiver has failed. */
IEEE802154_DISABLE_TRX_FAIL = 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_PANID_CONFLICT = 0xee,
/* A coordinator realignment command has been received. */
IEEE802154_REALIGMENT = 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_ATTR = 0xf4,
/*
* 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,
};
/* 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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