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341 lines
8.8 KiB
341 lines
8.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* An interface between IEEE802.15.4 device and rest of the kernel. |
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* |
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* Copyright (C) 2007-2012 Siemens AG |
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* |
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* Written by: |
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* Pavel Smolenskiy <[email protected]> |
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* Maxim Gorbachyov <[email protected]> |
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* Maxim Osipov <[email protected]> |
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* Dmitry Eremin-Solenikov <[email protected]> |
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* Alexander Smirnov <[email protected]> |
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*/ |
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#ifndef IEEE802154_NETDEVICE_H |
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#define IEEE802154_NETDEVICE_H |
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#include <net/af_ieee802154.h> |
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#include <linux/netdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/ieee802154.h> |
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#include <net/cfg802154.h> |
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struct ieee802154_sechdr { |
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#if defined(__LITTLE_ENDIAN_BITFIELD) |
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u8 level:3, |
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key_id_mode:2, |
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reserved:3; |
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#elif defined(__BIG_ENDIAN_BITFIELD) |
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u8 reserved:3, |
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key_id_mode:2, |
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level:3; |
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#else |
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#error "Please fix <asm/byteorder.h>" |
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#endif |
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u8 key_id; |
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__le32 frame_counter; |
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union { |
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__le32 short_src; |
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__le64 extended_src; |
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}; |
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}; |
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struct ieee802154_hdr_fc { |
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#if defined(__LITTLE_ENDIAN_BITFIELD) |
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u16 type:3, |
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security_enabled:1, |
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frame_pending:1, |
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ack_request:1, |
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intra_pan:1, |
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reserved:3, |
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dest_addr_mode:2, |
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version:2, |
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source_addr_mode:2; |
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#elif defined(__BIG_ENDIAN_BITFIELD) |
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u16 reserved:1, |
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intra_pan:1, |
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ack_request:1, |
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frame_pending:1, |
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security_enabled:1, |
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type:3, |
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source_addr_mode:2, |
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version:2, |
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dest_addr_mode:2, |
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reserved2:2; |
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#else |
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#error "Please fix <asm/byteorder.h>" |
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#endif |
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}; |
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struct ieee802154_hdr { |
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struct ieee802154_hdr_fc fc; |
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u8 seq; |
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struct ieee802154_addr source; |
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struct ieee802154_addr dest; |
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struct ieee802154_sechdr sec; |
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}; |
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/* pushes hdr onto the skb. fields of hdr->fc that can be calculated from |
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* the contents of hdr will be, and the actual value of those bits in |
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* hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame |
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* version, if SECEN is set. |
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*/ |
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int ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr); |
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/* pulls the entire 802.15.4 header off of the skb, including the security |
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* header, and performs pan id decompression |
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*/ |
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int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr); |
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/* parses the frame control, sequence number of address fields in a given skb |
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* and stores them into hdr, performing pan id decompression and length checks |
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* to be suitable for use in header_ops.parse |
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*/ |
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int ieee802154_hdr_peek_addrs(const struct sk_buff *skb, |
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struct ieee802154_hdr *hdr); |
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/* parses the full 802.15.4 header a given skb and stores them into hdr, |
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* performing pan id decompression and length checks to be suitable for use in |
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* header_ops.parse |
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*/ |
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int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr); |
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int ieee802154_max_payload(const struct ieee802154_hdr *hdr); |
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static inline int |
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ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec) |
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{ |
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switch (sec->level) { |
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case IEEE802154_SCF_SECLEVEL_MIC32: |
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case IEEE802154_SCF_SECLEVEL_ENC_MIC32: |
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return 4; |
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case IEEE802154_SCF_SECLEVEL_MIC64: |
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case IEEE802154_SCF_SECLEVEL_ENC_MIC64: |
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return 8; |
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case IEEE802154_SCF_SECLEVEL_MIC128: |
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case IEEE802154_SCF_SECLEVEL_ENC_MIC128: |
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return 16; |
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case IEEE802154_SCF_SECLEVEL_NONE: |
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case IEEE802154_SCF_SECLEVEL_ENC: |
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default: |
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return 0; |
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} |
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} |
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static inline int ieee802154_hdr_length(struct sk_buff *skb) |
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{ |
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struct ieee802154_hdr hdr; |
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int len = ieee802154_hdr_pull(skb, &hdr); |
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if (len > 0) |
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skb_push(skb, len); |
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return len; |
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} |
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static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1, |
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const struct ieee802154_addr *a2) |
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{ |
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if (a1->pan_id != a2->pan_id || a1->mode != a2->mode) |
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return false; |
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if ((a1->mode == IEEE802154_ADDR_LONG && |
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a1->extended_addr != a2->extended_addr) || |
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(a1->mode == IEEE802154_ADDR_SHORT && |
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a1->short_addr != a2->short_addr)) |
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return false; |
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return true; |
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} |
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static inline __le64 ieee802154_devaddr_from_raw(const void *raw) |
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{ |
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u64 temp; |
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memcpy(&temp, raw, IEEE802154_ADDR_LEN); |
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return (__force __le64)swab64(temp); |
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} |
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static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr) |
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{ |
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u64 temp = swab64((__force u64)addr); |
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memcpy(raw, &temp, IEEE802154_ADDR_LEN); |
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} |
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static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a, |
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const struct ieee802154_addr_sa *sa) |
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{ |
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a->mode = sa->addr_type; |
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a->pan_id = cpu_to_le16(sa->pan_id); |
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switch (a->mode) { |
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case IEEE802154_ADDR_SHORT: |
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a->short_addr = cpu_to_le16(sa->short_addr); |
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break; |
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case IEEE802154_ADDR_LONG: |
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a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr); |
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break; |
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} |
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} |
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static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa, |
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const struct ieee802154_addr *a) |
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{ |
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sa->addr_type = a->mode; |
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sa->pan_id = le16_to_cpu(a->pan_id); |
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switch (a->mode) { |
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case IEEE802154_ADDR_SHORT: |
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sa->short_addr = le16_to_cpu(a->short_addr); |
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break; |
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case IEEE802154_ADDR_LONG: |
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ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr); |
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break; |
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} |
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} |
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/* |
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* A control block of skb passed between the ARPHRD_IEEE802154 device |
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* and other stack parts. |
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*/ |
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struct ieee802154_mac_cb { |
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u8 lqi; |
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u8 type; |
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bool ackreq; |
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bool secen; |
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bool secen_override; |
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u8 seclevel; |
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bool seclevel_override; |
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struct ieee802154_addr source; |
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struct ieee802154_addr dest; |
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}; |
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static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb) |
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{ |
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return (struct ieee802154_mac_cb *)skb->cb; |
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} |
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static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb) |
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{ |
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BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb)); |
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memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb)); |
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return mac_cb(skb); |
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} |
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enum { |
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IEEE802154_LLSEC_DEVKEY_IGNORE, |
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IEEE802154_LLSEC_DEVKEY_RESTRICT, |
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IEEE802154_LLSEC_DEVKEY_RECORD, |
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__IEEE802154_LLSEC_DEVKEY_MAX, |
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}; |
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#define IEEE802154_MAC_SCAN_ED 0 |
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#define IEEE802154_MAC_SCAN_ACTIVE 1 |
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#define IEEE802154_MAC_SCAN_PASSIVE 2 |
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#define IEEE802154_MAC_SCAN_ORPHAN 3 |
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struct ieee802154_mac_params { |
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s8 transmit_power; |
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u8 min_be; |
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u8 max_be; |
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u8 csma_retries; |
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s8 frame_retries; |
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bool lbt; |
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struct wpan_phy_cca cca; |
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s32 cca_ed_level; |
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}; |
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struct wpan_phy; |
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enum { |
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IEEE802154_LLSEC_PARAM_ENABLED = BIT(0), |
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IEEE802154_LLSEC_PARAM_FRAME_COUNTER = BIT(1), |
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IEEE802154_LLSEC_PARAM_OUT_LEVEL = BIT(2), |
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IEEE802154_LLSEC_PARAM_OUT_KEY = BIT(3), |
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IEEE802154_LLSEC_PARAM_KEY_SOURCE = BIT(4), |
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IEEE802154_LLSEC_PARAM_PAN_ID = BIT(5), |
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IEEE802154_LLSEC_PARAM_HWADDR = BIT(6), |
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IEEE802154_LLSEC_PARAM_COORD_HWADDR = BIT(7), |
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IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = BIT(8), |
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}; |
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struct ieee802154_llsec_ops { |
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int (*get_params)(struct net_device *dev, |
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struct ieee802154_llsec_params *params); |
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int (*set_params)(struct net_device *dev, |
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const struct ieee802154_llsec_params *params, |
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int changed); |
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int (*add_key)(struct net_device *dev, |
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const struct ieee802154_llsec_key_id *id, |
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const struct ieee802154_llsec_key *key); |
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int (*del_key)(struct net_device *dev, |
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const struct ieee802154_llsec_key_id *id); |
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int (*add_dev)(struct net_device *dev, |
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const struct ieee802154_llsec_device *llsec_dev); |
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int (*del_dev)(struct net_device *dev, __le64 dev_addr); |
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int (*add_devkey)(struct net_device *dev, |
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__le64 device_addr, |
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const struct ieee802154_llsec_device_key *key); |
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int (*del_devkey)(struct net_device *dev, |
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__le64 device_addr, |
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const struct ieee802154_llsec_device_key *key); |
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int (*add_seclevel)(struct net_device *dev, |
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const struct ieee802154_llsec_seclevel *sl); |
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int (*del_seclevel)(struct net_device *dev, |
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const struct ieee802154_llsec_seclevel *sl); |
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void (*lock_table)(struct net_device *dev); |
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void (*get_table)(struct net_device *dev, |
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struct ieee802154_llsec_table **t); |
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void (*unlock_table)(struct net_device *dev); |
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}; |
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/* |
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* This should be located at net_device->ml_priv |
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* |
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* get_phy should increment the reference counting on returned phy. |
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* Use wpan_wpy_put to put that reference. |
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*/ |
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struct ieee802154_mlme_ops { |
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/* The following fields are optional (can be NULL). */ |
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int (*assoc_req)(struct net_device *dev, |
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struct ieee802154_addr *addr, |
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u8 channel, u8 page, u8 cap); |
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int (*assoc_resp)(struct net_device *dev, |
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struct ieee802154_addr *addr, |
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__le16 short_addr, u8 status); |
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int (*disassoc_req)(struct net_device *dev, |
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struct ieee802154_addr *addr, |
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u8 reason); |
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int (*start_req)(struct net_device *dev, |
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struct ieee802154_addr *addr, |
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u8 channel, u8 page, u8 bcn_ord, u8 sf_ord, |
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u8 pan_coord, u8 blx, u8 coord_realign); |
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int (*scan_req)(struct net_device *dev, |
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u8 type, u32 channels, u8 page, u8 duration); |
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int (*set_mac_params)(struct net_device *dev, |
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const struct ieee802154_mac_params *params); |
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void (*get_mac_params)(struct net_device *dev, |
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struct ieee802154_mac_params *params); |
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const struct ieee802154_llsec_ops *llsec; |
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}; |
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static inline struct ieee802154_mlme_ops * |
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ieee802154_mlme_ops(const struct net_device *dev) |
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{ |
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return dev->ml_priv; |
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} |
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#endif
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