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129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* Copyright (C) 2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_ieee802154 IEEE802.15.4
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* @ingroup net
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* @brief IEEE802.15.4 header definitions and utility functions
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* @{
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*
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* @file
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* @brief IEEE 802.14.4 header definitions
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*/
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#ifndef IEEE802154_H_
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#define IEEE802154_H_
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#include <stdlib.h>
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#include "net/eui64.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief IEEE802.15.4 FCF field definitions
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* @{
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*/
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#define IEEE802154_MAX_HDR_LEN (23U)
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#define IEEE802154_FCF_LEN (2U)
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#define IEEE802154_FCS_LEN (2U)
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#define IEEE802154_FCF_TYPE_MASK (0x07)
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#define IEEE802154_FCF_TYPE_BEACON (0x00)
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#define IEEE802154_FCF_TYPE_DATA (0x01)
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#define IEEE802154_FCF_TYPE_ACK (0x02)
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#define IEEE802154_FCF_TYPE_MACCMD (0x03)
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#define IEEE802154_FCF_SECURITY_EN (0x08)
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#define IEEE802154_FCF_FRAME_PEND (0x10)
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#define IEEE802154_FCF_ACK_REQ (0x20)
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#define IEEE802154_FCF_PAN_COMP (0x40)
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#define IEEE802154_FCF_DST_ADDR_MASK (0x0c)
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#define IEEE802154_FCF_DST_ADDR_VOID (0x00)
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#define IEEE802154_FCF_DST_ADDR_SHORT (0x08)
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#define IEEE802154_FCF_DST_ADDR_LONG (0x0c)
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#define IEEE802154_FCF_VERS_V0 (0x00)
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#define IEEE802154_FCF_VERS_V1 (0x10)
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#define IEEE802154_FCF_SRC_ADDR_MASK (0xc0)
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#define IEEE802154_FCF_SRC_ADDR_VOID (0x00)
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#define IEEE802154_FCF_SRC_ADDR_SHORT (0x80)
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#define IEEE802154_FCF_SRC_ADDR_LONG (0xc0)
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/** @} */
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/**
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* @brief Generates an IPv6 interface identifier from an IEEE 802.15.4 address.
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*
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* @see <a href="https://tools.ietf.org/html/rfc4944#section-6">
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* RFC 4944, section 6
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* </a>
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* @see <a href="https://tools.ietf.org/html/rfc6282#section-3.2.2">
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* RFC 6282, section 3.2.2
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* </a>
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*
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* @param[out] eui64 The resulting EUI-64.
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* @param[in] addr An IEEE 802.15.4 address.
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* @param[in] addr_len The length of @p addr. Must be 2 (short address),
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* 4 (PAN ID + short address), or 8 (long address).
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*
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* @return Copy of @p eui64 on success.
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* @return NULL, if @p addr_len was of illegal length.
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*/
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static inline eui64_t *ieee802154_get_iid(eui64_t *eui64, uint8_t *addr,
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size_t addr_len)
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{
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int i = 0;
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eui64->uint8[0] = eui64->uint8[1] = 0;
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switch (addr_len) {
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case 8:
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eui64->uint8[0] = addr[i++] ^ 0x02;
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eui64->uint8[1] = addr[i++];
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eui64->uint8[2] = addr[i++];
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eui64->uint8[3] = addr[i++];
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eui64->uint8[4] = addr[i++];
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eui64->uint8[5] = addr[i++];
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eui64->uint8[6] = addr[i++];
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eui64->uint8[7] = addr[i++];
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break;
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case 4:
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eui64->uint8[0] = addr[i++] ^ 0x02;
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eui64->uint8[1] = addr[i++];
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case 2:
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eui64->uint8[2] = 0;
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eui64->uint8[3] = 0xff;
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eui64->uint8[4] = 0xfe;
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eui64->uint8[5] = 0;
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eui64->uint8[6] = addr[i++];
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eui64->uint8[7] = addr[i++];
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break;
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default:
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return NULL;
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}
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return eui64;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* IEEE802154_H_ */
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/** @} */
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