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alistair23-linux/include/net/ieee802154_netdev.h
Alexander Aring 7fe9a3882b ieee802154: rework cca setting 
The current cca setting handle is a driver specific call. We need to
introduce some 802.15.4 specific layer and mapping 802.15.4 cca modes to
driver specific ones inside the 802.15.4 driver. This patch will add
such 802.15.4 layer and mapping the cca settings to driver specific ones.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-19 00:19:23 +01:00

450 lines
11 KiB
C
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/*
* An interface between IEEE802.15.4 device and rest of the kernel.
*
* Copyright (C) 2007-2012 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 IEEE802154_NETDEVICE_H
#define IEEE802154_NETDEVICE_H
#include <net/af_ieee802154.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/ieee802154.h>
#include <net/cfg802154.h>
struct ieee802154_sechdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
u8 level:3,
key_id_mode:2,
reserved:3;
#elif defined(__BIG_ENDIAN_BITFIELD)
u8 reserved:3,
key_id_mode:2,
level:3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
u8 key_id;
__le32 frame_counter;
union {
__le32 short_src;
__le64 extended_src;
};
};
struct ieee802154_addr {
u8 mode;
__le16 pan_id;
union {
__le16 short_addr;
__le64 extended_addr;
};
};
struct ieee802154_hdr_fc {
#if defined(__LITTLE_ENDIAN_BITFIELD)
u16 type:3,
security_enabled:1,
frame_pending:1,
ack_request:1,
intra_pan:1,
reserved:3,
dest_addr_mode:2,
version:2,
source_addr_mode:2;
#elif defined(__BIG_ENDIAN_BITFIELD)
u16 reserved:1,
intra_pan:1,
ack_request:1,
frame_pending:1,
security_enabled:1,
type:3,
source_addr_mode:2,
version:2,
dest_addr_mode:2,
reserved2:2;
#else
#error "Please fix <asm/byteorder.h>"
#endif
};
struct ieee802154_hdr {
struct ieee802154_hdr_fc fc;
u8 seq;
struct ieee802154_addr source;
struct ieee802154_addr dest;
struct ieee802154_sechdr sec;
};
/* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
* the contents of hdr will be, and the actual value of those bits in
* hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
* version, if SECEN is set.
*/
int ieee802154_hdr_push(struct sk_buff *skb, const struct ieee802154_hdr *hdr);
/* pulls the entire 802.15.4 header off of the skb, including the security
* header, and performs pan id decompression
*/
int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
/* parses the frame control, sequence number of address fields in a given skb
* and stores them into hdr, performing pan id decompression and length checks
* to be suitable for use in header_ops.parse
*/
int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
struct ieee802154_hdr *hdr);
/* parses the full 802.15.4 header a given skb and stores them into hdr,
* performing pan id decompression and length checks to be suitable for use in
* header_ops.parse
*/
int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
static inline int
ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec)
{
switch (sec->level) {
case IEEE802154_SCF_SECLEVEL_MIC32:
case IEEE802154_SCF_SECLEVEL_ENC_MIC32:
return 4;
case IEEE802154_SCF_SECLEVEL_MIC64:
case IEEE802154_SCF_SECLEVEL_ENC_MIC64:
return 8;
case IEEE802154_SCF_SECLEVEL_MIC128:
case IEEE802154_SCF_SECLEVEL_ENC_MIC128:
return 16;
case IEEE802154_SCF_SECLEVEL_NONE:
case IEEE802154_SCF_SECLEVEL_ENC:
default:
return 0;
}
}
static inline int ieee802154_hdr_length(struct sk_buff *skb)
{
struct ieee802154_hdr hdr;
int len = ieee802154_hdr_pull(skb, &hdr);
if (len > 0)
skb_push(skb, len);
return len;
}
static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
const struct ieee802154_addr *a2)
{
if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
return false;
if ((a1->mode == IEEE802154_ADDR_LONG &&
a1->extended_addr != a2->extended_addr) ||
(a1->mode == IEEE802154_ADDR_SHORT &&
a1->short_addr != a2->short_addr))
return false;
return true;
}
static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
{
u64 temp;
memcpy(&temp, raw, IEEE802154_ADDR_LEN);
return (__force __le64)swab64(temp);
}
static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
{
u64 temp = swab64((__force u64)addr);
memcpy(raw, &temp, IEEE802154_ADDR_LEN);
}
static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
const struct ieee802154_addr_sa *sa)
{
a->mode = sa->addr_type;
a->pan_id = cpu_to_le16(sa->pan_id);
switch (a->mode) {
case IEEE802154_ADDR_SHORT:
a->short_addr = cpu_to_le16(sa->short_addr);
break;
case IEEE802154_ADDR_LONG:
a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
break;
}
}
static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
const struct ieee802154_addr *a)
{
sa->addr_type = a->mode;
sa->pan_id = le16_to_cpu(a->pan_id);
switch (a->mode) {
case IEEE802154_ADDR_SHORT:
sa->short_addr = le16_to_cpu(a->short_addr);
break;
case IEEE802154_ADDR_LONG:
ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
break;
}
}
/*
* A control block of skb passed between the ARPHRD_IEEE802154 device
* and other stack parts.
*/
struct ieee802154_mac_cb {
u8 lqi;
u8 type;
bool ackreq;
bool secen;
bool secen_override;
u8 seclevel;
bool seclevel_override;
struct ieee802154_addr source;
struct ieee802154_addr dest;
};
static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
{
return (struct ieee802154_mac_cb *)skb->cb;
}
static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb));
memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb));
return mac_cb(skb);
}
#define IEEE802154_LLSEC_KEY_SIZE 16
struct ieee802154_llsec_key_id {
u8 mode;
u8 id;
union {
struct ieee802154_addr device_addr;
__le32 short_source;
__le64 extended_source;
};
};
struct ieee802154_llsec_key {
u8 frame_types;
u32 cmd_frame_ids;
u8 key[IEEE802154_LLSEC_KEY_SIZE];
};
struct ieee802154_llsec_key_entry {
struct list_head list;
struct ieee802154_llsec_key_id id;
struct ieee802154_llsec_key *key;
};
struct ieee802154_llsec_device_key {
struct list_head list;
struct ieee802154_llsec_key_id key_id;
u32 frame_counter;
};
enum {
IEEE802154_LLSEC_DEVKEY_IGNORE,
IEEE802154_LLSEC_DEVKEY_RESTRICT,
IEEE802154_LLSEC_DEVKEY_RECORD,
__IEEE802154_LLSEC_DEVKEY_MAX,
};
struct ieee802154_llsec_device {
struct list_head list;
__le16 pan_id;
__le16 short_addr;
__le64 hwaddr;
u32 frame_counter;
bool seclevel_exempt;
u8 key_mode;
struct list_head keys;
};
struct ieee802154_llsec_seclevel {
struct list_head list;
u8 frame_type;
u8 cmd_frame_id;
bool device_override;
u32 sec_levels;
};
struct ieee802154_llsec_params {
bool enabled;
__be32 frame_counter;
u8 out_level;
struct ieee802154_llsec_key_id out_key;
__le64 default_key_source;
__le16 pan_id;
__le64 hwaddr;
__le64 coord_hwaddr;
__le16 coord_shortaddr;
};
struct ieee802154_llsec_table {
struct list_head keys;
struct list_head devices;
struct list_head security_levels;
};
#define IEEE802154_MAC_SCAN_ED 0
#define IEEE802154_MAC_SCAN_ACTIVE 1
#define IEEE802154_MAC_SCAN_PASSIVE 2
#define IEEE802154_MAC_SCAN_ORPHAN 3
struct ieee802154_mac_params {
s8 transmit_power;
u8 min_be;
u8 max_be;
u8 csma_retries;
s8 frame_retries;
bool lbt;
struct wpan_phy_cca cca;
s32 cca_ed_level;
};
struct wpan_phy;
enum {
IEEE802154_LLSEC_PARAM_ENABLED = 1 << 0,
IEEE802154_LLSEC_PARAM_FRAME_COUNTER = 1 << 1,
IEEE802154_LLSEC_PARAM_OUT_LEVEL = 1 << 2,
IEEE802154_LLSEC_PARAM_OUT_KEY = 1 << 3,
IEEE802154_LLSEC_PARAM_KEY_SOURCE = 1 << 4,
IEEE802154_LLSEC_PARAM_PAN_ID = 1 << 5,
IEEE802154_LLSEC_PARAM_HWADDR = 1 << 6,
IEEE802154_LLSEC_PARAM_COORD_HWADDR = 1 << 7,
IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = 1 << 8,
};
struct ieee802154_llsec_ops {
int (*get_params)(struct net_device *dev,
struct ieee802154_llsec_params *params);
int (*set_params)(struct net_device *dev,
const struct ieee802154_llsec_params *params,
int changed);
int (*add_key)(struct net_device *dev,
const struct ieee802154_llsec_key_id *id,
const struct ieee802154_llsec_key *key);
int (*del_key)(struct net_device *dev,
const struct ieee802154_llsec_key_id *id);
int (*add_dev)(struct net_device *dev,
const struct ieee802154_llsec_device *llsec_dev);
int (*del_dev)(struct net_device *dev, __le64 dev_addr);
int (*add_devkey)(struct net_device *dev,
__le64 device_addr,
const struct ieee802154_llsec_device_key *key);
int (*del_devkey)(struct net_device *dev,
__le64 device_addr,
const struct ieee802154_llsec_device_key *key);
int (*add_seclevel)(struct net_device *dev,
const struct ieee802154_llsec_seclevel *sl);
int (*del_seclevel)(struct net_device *dev,
const struct ieee802154_llsec_seclevel *sl);
void (*lock_table)(struct net_device *dev);
void (*get_table)(struct net_device *dev,
struct ieee802154_llsec_table **t);
void (*unlock_table)(struct net_device *dev);
};
/*
* This should be located at net_device->ml_priv
*
* get_phy should increment the reference counting on returned phy.
* Use wpan_wpy_put to put that reference.
*/
struct ieee802154_mlme_ops {
/* The following fields are optional (can be NULL). */
int (*assoc_req)(struct net_device *dev,
struct ieee802154_addr *addr,
u8 channel, u8 page, u8 cap);
int (*assoc_resp)(struct net_device *dev,
struct ieee802154_addr *addr,
__le16 short_addr, u8 status);
int (*disassoc_req)(struct net_device *dev,
struct ieee802154_addr *addr,
u8 reason);
int (*start_req)(struct net_device *dev,
struct ieee802154_addr *addr,
u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
u8 pan_coord, u8 blx, u8 coord_realign);
int (*scan_req)(struct net_device *dev,
u8 type, u32 channels, u8 page, u8 duration);
int (*set_mac_params)(struct net_device *dev,
const struct ieee802154_mac_params *params);
void (*get_mac_params)(struct net_device *dev,
struct ieee802154_mac_params *params);
struct ieee802154_llsec_ops *llsec;
/* The fields below are required. */
/*
* FIXME: these should become the part of PIB/MIB interface.
* However we still don't have IB interface of any kind
*/
__le16 (*get_pan_id)(const struct net_device *dev);
__le16 (*get_short_addr)(const struct net_device *dev);
u8 (*get_dsn)(const struct net_device *dev);
};
static inline struct ieee802154_mlme_ops *
ieee802154_mlme_ops(const struct net_device *dev)
{
return dev->ml_priv;
}
static inline struct ieee802154_reduced_mlme_ops *
ieee802154_reduced_mlme_ops(const struct net_device *dev)
{
return dev->ml_priv;
}
#endif
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