Quelle mac802154.h
Sprache: C
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* IEEE802 . 15 . 4 - 2003 specification
*
* Copyright ( C ) 2007 - 2012 Siemens AG
*/
#ifndef NET_MAC802154_H
#define NET_MAC802154_H
#include <linux/unaligned.h>
#include <net/af_ieee802154.h>
#include <linux/ieee802154.h>
#include <linux/skbuff.h>
#include <net/cfg802154.h>
/**
* enum ieee802154_hw_addr_filt_flags - hardware address filtering flags
*
* The following flags are used to indicate changed address settings from
* the stack to the hardware .
*
* @ IEEE802154_AFILT_SADDR_CHANGED : Indicates that the short address will be
* change .
*
* @ IEEE802154_AFILT_IEEEADDR_CHANGED : Indicates that the extended address
* will be change .
*
* @ IEEE802154_AFILT_PANID_CHANGED : Indicates that the pan id will be change .
*
* @ IEEE802154_AFILT_PANC_CHANGED : Indicates that the address filter will
* do frame address filtering as a pan coordinator .
*/
enum ieee802154_hw_addr_filt_flags {
IEEE802154_AFILT_SADDR_CHANGED = BIT(0 ),
IEEE802154_AFILT_IEEEADDR_CHANGED = BIT(1 ),
IEEE802154_AFILT_PANID_CHANGED = BIT(2 ),
IEEE802154_AFILT_PANC_CHANGED = BIT(3 ),
};
/**
* struct ieee802154_hw_addr_filt - hardware address filtering settings
*
* @ pan_id : pan_id which should be set to the hardware address filter .
*
* @ short_addr : short_addr which should be set to the hardware address filter .
*
* @ ieee_addr : extended address which should be set to the hardware address
* filter .
*
* @ pan_coord : boolean if hardware filtering should be operate as coordinator .
*/
struct ieee802154_hw_addr_filt {
__le16 pan_id;
__le16 short_addr;
__le64 ieee_addr;
bool pan_coord;
};
/**
* struct ieee802154_hw - ieee802154 hardware
*
* @ extra_tx_headroom : headroom to reserve in each transmit skb for use by the
* driver ( e . g . for transmit headers . )
*
* @ flags : hardware flags , see & enum ieee802154_hw_flags
*
* @ parent : parent device of the hardware .
*
* @ priv : pointer to private area that was allocated for driver use along with
* this structure .
*
* @ phy : This points to the & struct wpan_phy allocated for this 802 . 15 . 4 PHY .
*/
struct ieee802154_hw {
/* filled by the driver */
int extra_tx_headroom;
u32 flags;
struct device *parent;
void *priv;
/* filled by mac802154 core */
struct wpan_phy *phy;
};
/**
* enum ieee802154_hw_flags - hardware flags
*
* These flags are used to indicate hardware capabilities to
* the stack . Generally , flags here should have their meaning
* done in a way that the simplest hardware doesn ' t need setting
* any particular flags . There are some exceptions to this rule ,
* however , so you are advised to review these flags carefully .
*
* @ IEEE802154_HW_TX_OMIT_CKSUM : Indicates that xmitter will add FCS on it ' s
* own .
*
* @ IEEE802154_HW_LBT : Indicates that transceiver will support listen before
* transmit .
*
* @ IEEE802154_HW_CSMA_PARAMS : Indicates that transceiver will support csma
* parameters ( max_be , min_be , backoff exponents ) .
*
* @ IEEE802154_HW_FRAME_RETRIES : Indicates that transceiver will support ARET
* frame retries setting .
*
* @ IEEE802154_HW_AFILT : Indicates that transceiver will support hardware
* address filter setting .
*
* @ IEEE802154_HW_PROMISCUOUS : Indicates that transceiver will support
* promiscuous mode setting .
*
* @ IEEE802154_HW_RX_OMIT_CKSUM : Indicates that receiver omits FCS .
*/
enum ieee802154_hw_flags {
IEEE802154_HW_TX_OMIT_CKSUM = BIT(0 ),
IEEE802154_HW_LBT = BIT(1 ),
IEEE802154_HW_CSMA_PARAMS = BIT(2 ),
IEEE802154_HW_FRAME_RETRIES = BIT(3 ),
IEEE802154_HW_AFILT = BIT(4 ),
IEEE802154_HW_PROMISCUOUS = BIT(5 ),
IEEE802154_HW_RX_OMIT_CKSUM = BIT(6 ),
};
/* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
#define IEEE802154_HW_OMIT_CKSUM (IEEE802154_HW_TX_OMIT_CKSUM | \
IEEE802154_HW_RX_OMIT_CKSUM)
/* struct ieee802154_ops - callbacks from mac802154 to the driver
*
* This structure contains various callbacks that the driver may
* handle or , in some cases , must handle , for example to transmit
* a frame .
*
* start : Handler that 802 . 15 . 4 module calls for device initialization .
* This function is called before the first interface is attached .
*
* stop : Handler that 802 . 15 . 4 module calls for device cleanup .
* This function is called after the last interface is removed .
*
* xmit_sync :
* Handler that 802 . 15 . 4 module calls for each transmitted frame .
* skb contains the buffer starting from the IEEE 802 . 15 . 4 header .
* The low - level driver should send the frame based on available
* configuration . This is called by a workqueue and useful for
* synchronous 802 . 15 . 4 drivers .
* This function should return zero or negative errno .
*
* WARNING :
* This will be deprecated soon . We don ' t accept synced xmit callbacks
* drivers anymore .
*
* xmit_async :
* Handler that 802 . 15 . 4 module calls for each transmitted frame .
* skb contains the buffer starting from the IEEE 802 . 15 . 4 header .
* The low - level driver should send the frame based on available
* configuration .
* This function should return zero or negative errno .
*
* ed : Handler that 802 . 15 . 4 module calls for Energy Detection .
* This function should place the value for detected energy
* ( usually device - dependant ) in the level pointer and return
* either zero or negative errno . Called with pib_lock held .
*
* set_channel :
* Set radio for listening on specific channel .
* Set the device for listening on specified channel .
* Returns either zero , or negative errno . Called with pib_lock held .
*
* set_hw_addr_filt :
* Set radio for listening on specific address .
* Set the device for listening on specified address .
* Returns either zero , or negative errno .
*
* set_txpower :
* Set radio transmit power in mBm . Called with pib_lock held .
* Returns either zero , or negative errno .
*
* set_lbt
* Enables or disables listen before talk on the device . Called with
* pib_lock held .
* Returns either zero , or negative errno .
*
* set_cca_mode
* Sets the CCA mode used by the device . Called with pib_lock held .
* Returns either zero , or negative errno .
*
* set_cca_ed_level
* Sets the CCA energy detection threshold in mBm . Called with pib_lock
* held .
* Returns either zero , or negative errno .
*
* set_csma_params
* Sets the CSMA parameter set for the PHY . Called with pib_lock held .
* Returns either zero , or negative errno .
*
* set_frame_retries
* Sets the retransmission attempt limit . Called with pib_lock held .
* Returns either zero , or negative errno .
*
* set_promiscuous_mode
* Enables or disable promiscuous mode .
*/
struct ieee802154_ops {
struct module *owner;
int (*start)(struct ieee802154_hw *hw);
void (*stop)(struct ieee802154_hw *hw);
int (*xmit_sync)(struct ieee802154_hw *hw,
struct sk_buff *skb);
int (*xmit_async)(struct ieee802154_hw *hw,
struct sk_buff *skb);
int (*ed)(struct ieee802154_hw *hw, u8 *level);
int (*set_channel)(struct ieee802154_hw *hw, u8 page,
u8 channel);
int (*set_hw_addr_filt)(struct ieee802154_hw *hw,
struct ieee802154_hw_addr_filt *filt,
unsigned long changed);
int (*set_txpower)(struct ieee802154_hw *hw, s32 mbm);
int (*set_lbt)(struct ieee802154_hw *hw, bool on);
int (*set_cca_mode)(struct ieee802154_hw *hw,
const struct wpan_phy_cca *cca);
int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm);
int (*set_csma_params)(struct ieee802154_hw *hw,
u8 min_be, u8 max_be, u8 retries);
int (*set_frame_retries)(struct ieee802154_hw *hw,
s8 retries);
int (*set_promiscuous_mode)(struct ieee802154_hw *hw,
const bool on);
};
/**
* ieee802154_get_fc_from_skb - get the frame control field from an skb
* @ skb : skb where the frame control field will be get from
*/
static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
{
__le16 fc;
/* check if we can fc at skb_mac_header of sk buffer */
if (WARN_ON(!skb_mac_header_was_set(skb) ||
(skb_tail_pointer(skb) -
skb_mac_header(skb)) < IEEE802154_FC_LEN))
return cpu_to_le16(0 );
memcpy(&fc, skb_mac_header(skb), IEEE802154_FC_LEN);
return fc;
}
/**
* ieee802154_skb_dst_pan - get the pointer to destination pan field
* @ fc : mac header frame control field
* @ skb : skb where the destination pan pointer will be get from
*/
static inline unsigned char *ieee802154_skb_dst_pan(__le16 fc,
const struct sk_buff *skb)
{
unsigned char *dst_pan;
switch (ieee802154_daddr_mode(fc)) {
case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
dst_pan = NULL;
break ;
case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
dst_pan = skb_mac_header(skb) +
IEEE802154_FC_LEN +
IEEE802154_SEQ_LEN;
break ;
default :
WARN_ONCE(1 , "invalid addr mode detected" );
dst_pan = NULL;
break ;
}
return dst_pan;
}
/**
* ieee802154_skb_src_pan - get the pointer to source pan field
* @ fc : mac header frame control field
* @ skb : skb where the source pan pointer will be get from
*/
static inline unsigned char *ieee802154_skb_src_pan(__le16 fc,
const struct sk_buff *skb)
{
unsigned char *src_pan;
switch (ieee802154_saddr_mode(fc)) {
case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
src_pan = NULL;
break ;
case cpu_to_le16(IEEE802154_FCTL_SADDR_SHORT):
case cpu_to_le16(IEEE802154_FCTL_SADDR_EXTENDED):
/* if intra-pan and source addr mode is non none,
* then source pan id is equal destination pan id .
*/
if (ieee802154_is_intra_pan(fc)) {
src_pan = ieee802154_skb_dst_pan(fc, skb);
break ;
}
switch (ieee802154_daddr_mode(fc)) {
case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
src_pan = skb_mac_header(skb) +
IEEE802154_FC_LEN +
IEEE802154_SEQ_LEN;
break ;
case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
src_pan = skb_mac_header(skb) +
IEEE802154_FC_LEN +
IEEE802154_SEQ_LEN +
IEEE802154_PAN_ID_LEN +
IEEE802154_SHORT_ADDR_LEN;
break ;
case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
src_pan = skb_mac_header(skb) +
IEEE802154_FC_LEN +
IEEE802154_SEQ_LEN +
IEEE802154_PAN_ID_LEN +
IEEE802154_EXTENDED_ADDR_LEN;
break ;
default :
WARN_ONCE(1 , "invalid addr mode detected" );
src_pan = NULL;
break ;
}
break ;
default :
WARN_ONCE(1 , "invalid addr mode detected" );
src_pan = NULL;
break ;
}
return src_pan;
}
/**
* ieee802154_skb_is_intra_pan_addressing - checks whenever the mac addressing
* is an intra pan communication
* @ fc : mac header frame control field
* @ skb : skb where the source and destination pan should be get from
*/
static inline bool ieee802154_skb_is_intra_pan_addressing(__le16 fc,
const struct sk_buff *skb)
{
unsigned char *dst_pan = ieee802154_skb_dst_pan(fc, skb),
*src_pan = ieee802154_skb_src_pan(fc, skb);
/* if one is NULL is no intra pan addressing */
if (!dst_pan || !src_pan)
return false ;
return !memcmp(dst_pan, src_pan, IEEE802154_PAN_ID_LEN);
}
/**
* ieee802154_be64_to_le64 - copies and convert be64 to le64
* @ le64_dst : le64 destination pointer
* @ be64_src : be64 source pointer
*/
static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src)
{
put_unaligned_le64(get_unaligned_be64(be64_src), le64_dst);
}
/**
* ieee802154_le64_to_be64 - copies and convert le64 to be64
* @ be64_dst : be64 destination pointer
* @ le64_src : le64 source pointer
*/
static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src)
{
put_unaligned_be64(get_unaligned_le64(le64_src), be64_dst);
}
/**
* ieee802154_le16_to_be16 - copies and convert le16 to be16
* @ be16_dst : be16 destination pointer
* @ le16_src : le16 source pointer
*/
static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src)
{
put_unaligned_be16(get_unaligned_le16(le16_src), be16_dst);
}
/**
* ieee802154_be16_to_le16 - copies and convert be16 to le16
* @ le16_dst : le16 destination pointer
* @ be16_src : be16 source pointer
*/
static inline void ieee802154_be16_to_le16(void *le16_dst, const void *be16_src)
{
put_unaligned_le16(get_unaligned_be16(be16_src), le16_dst);
}
/**
* ieee802154_alloc_hw - Allocate a new hardware device
*
* This must be called once for each hardware device . The returned pointer
* must be used to refer to this device when calling other functions .
* mac802154 allocates a private data area for the driver pointed to by
* @ priv in & struct ieee802154_hw , the size of this area is given as
* @ priv_data_len .
*
* @ priv_data_len : length of private data
* @ ops : callbacks for this device
*
* Return : A pointer to the new hardware device , or % NULL on error .
*/
struct ieee802154_hw *
ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
/**
* ieee802154_free_hw - free hardware descriptor
*
* This function frees everything that was allocated , including the
* private data for the driver . You must call ieee802154_unregister_hw ( )
* before calling this function .
*
* @ hw : the hardware to free
*/
void ieee802154_free_hw(struct ieee802154_hw *hw);
/**
* ieee802154_register_hw - Register hardware device
*
* You must call this function before any other functions in
* mac802154 . Note that before a hardware can be registered , you
* need to fill the contained wpan_phy ' s information .
*
* @ hw : the device to register as returned by ieee802154_alloc_hw ( )
*
* Return : 0 on success . An error code otherwise .
*/
int ieee802154_register_hw(struct ieee802154_hw *hw);
/**
* ieee802154_unregister_hw - Unregister a hardware device
*
* This function instructs mac802154 to free allocated resources
* and unregister netdevices from the networking subsystem .
*
* @ hw : the hardware to unregister
*/
void ieee802154_unregister_hw(struct ieee802154_hw *hw);
/**
* ieee802154_rx_irqsafe - receive frame
*
* Like ieee802154_rx ( ) but can be called in IRQ context
* ( internally defers to a tasklet . )
*
* @ hw : the hardware this frame came in on
* @ skb : the buffer to receive , owned by mac802154 after this call
* @ lqi : link quality indicator
*/
void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
u8 lqi);
/**
* ieee802154_xmit_complete - frame transmission complete
*
* @ hw : pointer as obtained from ieee802154_alloc_hw ( ) .
* @ skb : buffer for transmission
* @ ifs_handling : indicate interframe space handling
*/
void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
bool ifs_handling);
/**
* ieee802154_xmit_error - offloaded frame transmission failed
*
* @ hw : pointer as obtained from ieee802154_alloc_hw ( ) .
* @ skb : buffer for transmission
* @ reason : error code
*/
void ieee802154_xmit_error(struct ieee802154_hw *hw, struct sk_buff *skb,
int reason);
/**
* ieee802154_xmit_hw_error - frame could not be offloaded to the transmitter
* because of a hardware error ( bus error , timeout , etc )
*
* @ hw : pointer as obtained from ieee802154_alloc_hw ( ) .
* @ skb : buffer for transmission
*/
void ieee802154_xmit_hw_error(struct ieee802154_hw *hw, struct sk_buff *skb);
#endif /* NET_MAC802154_H */
Messung V0.5 in Prozent C=95 H=100 G=97
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-09-27)
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*© Formatika GbR, Deutschland
2026-10-10
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