IEEE80211(9) | Kernel Developer's Manual | IEEE80211(9) |
ieee80211_ifattach
,
ieee80211_ifdetach
,
ieee80211_mhz2ieee
,
ieee80211_chan2ieee
,
ieee80211_ieee2mhz
,
ieee80211_media_init
,
ieee80211_media_change
,
ieee80211_media_status
,
ieee80211_watchdog
,
ieee80211_setmode
,
ieee80211_chan2mode
,
ieee80211_rate2media
,
ieee80211_media2rate
—
#include
<net80211/ieee80211_var.h>
#include
<net80211/ieee80211_proto.h>
void
ieee80211_ifattach
(struct
ieee80211com *ic);
void
ieee80211_ifdetach
(struct
ieee80211com *ic);
u_int
ieee80211_mhz2ieee
(u_int
freq, u_int
flags);
u_int
ieee80211_chan2ieee
(struct
ieee80211com *ic, struct
ieee80211_channel *c);
u_int
ieee80211_ieee2mhz
(u_int
chan, u_int
flags);
void
ieee80211_media_init
(struct
ieee80211com *ic, ifm_change_cb_t media_change,
ifm_stat_cb_t media_stat);
int
ieee80211_media_change
(struct
ifnet *ifp);
void
ieee80211_media_status
(struct
ifnet *ifp, struct
ifmediareq *imr);
void
ieee80211_watchdog
(struct
ieee80211com *ic);
int
ieee80211_setmode
(struct
ieee80211com *ic, enum
ieee80211_phymode mode);
enum ieee80211_phymode
ieee80211_chan2mode
(struct
ieee80211com *ic, struct ieee80211_channel
*chan);
int
ieee80211_rate2media
(struct
ieee80211com *ic, int rate, enum
ieee80211_phymode mode);
int
ieee80211_media2rate
(int
mword);
ieee80211
collection of functions are used to manage
wireless network interfaces in the system which use the system's software
802.11 network stack. Most of these functions require that attachment to the
stack is performed before calling. Several utility functions are also
provided; these are safe to call from any driver without prior initialization.
The ieee80211_ifattach
() function attaches
the wireless network interface ic to the 802.11
network stack layer. This function must be called before using any of the
ieee80211
functions which need to store driver state
across invocations. This function also performs Ethernet and BPF attachment
(by calling ether_ifattach
() and
bpfattach2
()) on behalf of the caller.
The ieee80211_ifdetach
() function frees
any ieee80211
structures associated with the driver,
and performs Ethernet and BPF detachment on behalf of the caller.
The ieee80211_mhz2ieee
() utility function
converts the frequency freq (specified in MHz) to an
IEEE 802.11 channel number. The flags argument is a
hint which specifies whether the frequency is in the 2GHz ISM band
(IEEE80211_CHAN_2GHZ) or the 5GHz band
(IEEE80211_CHAN_5GHZ); appropriate clipping of the
result is then performed.
The ieee80211_chan2ieee
() function
converts the channel specified in *c to an IEEE
channel number for the driver ic. If the conversion
would be invalid, an error message is printed to the system console. This
function REQUIRES that the driver is hooked up to the
ieee80211
subsystem.
The ieee80211_ieee2mhz
() utility function
converts the IEEE channel number chan to a frequency
(in MHz). The flags argument is a hint which specifies
whether the frequency is in the 2GHz ISM band
(IEEE80211_CHAN_2GHZ) or the 5GHz band
(IEEE80211_CHAN_5GHZ); appropriate clipping of the
result is then performed.
The ieee80211_media_init
() function
initializes media data structures used by the ifmedia
interface for the driver ic. It must be called by the
driver after calling ieee80211_ifattach
() and before
calling most ieee80211
functions. The
media_change and media_stat
arguments specify helper functions which will be invoked by the
ifmedia framework when the user changes or queries
media options, using a command such as
ifconfig(8).
The ieee80211_media_status
() and
ieee80211_media_change
() functions are
device-independent handlers for ifmedia commands and
are not intended to be called directly.
The ieee80211_watchdog
() function is
intended to be called from a driver's if_watchdog
routine. It is used to perform periodic cleanup of state within the software
802.11 stack, as well as timing out scans.
The ieee80211_setmode
() function is called
from within the 802.11 stack to change the mode of the driver's PHY; it is
not intended to be called directly.
The ieee80211_chan2mode
() function returns
the PHY mode required for use with the channel chan on
the device ic. This is typically used when selecting a
rate set, to be advertised in beacons, for example.
The ieee80211_rate2media
() function
converts the bit rate rate (measured in units of
0.5Mbps) to an ifmedia sub-type, for the device
ic running in PHY mode mode. The
ieee80211_media2rate
() performs the reverse of this
conversion, returning the bit rate (in 0.5Mbps units) corresponding to an
ifmedia sub-type.
ieee80211
series of functions first appeared in
NetBSD 1.5, and were later ported to
FreeBSD 4.6.
September 12, 2006 | NetBSD 9.0 |