void
ieee80211_node_attach(
struct ieee80211com *ic
)
void
ieee80211_node_lateattach(
struct ieee80211com *ic
)
void
ieee80211_node_detach(
struct ieee80211com *ic
)
void
ieee80211_begin_scan(
struct ieee80211com *ic
, int reset
)
void
ieee80211_next_scan(
struct ieee80211com *ic
)
void
ieee80211_end_scan(
struct ieee80211com *ic
)
void
ieee80211_create_ibss(
struct ieee80211com *ic
struct ieee80211_channel *chan
)
struct
ieee80211_node
*
ieee80211_alloc_node(
struct ieee80211com *ic
, u_int8_t *macaddr
)
struct
ieee80211_node
*
ieee80211_dup_bss(
struct ieee80211_node_table *nt
const u_int8_t *macaddr
)
struct
ieee80211_node
*
ieee80211_find_node(
struct ieee80211_node_table *nt
const u_int8_t *macaddr
)
void
ieee80211_free_node(
struct ieee80211_node *ni
)
void
ieee80211_free_allnodes(
struct ieee80211_node_table *nt
)
void
ieee80211_iterate_nodes(
struct ieee80211_node_table *nt
ieee80211_iter_func *f
void *arg
)
The
ieee80211_node_attach()
function is called from
ieee80211_ifattach(9)
to initialize node database management callbacks for the interface
ic
(specifically for memory allocation, node copying and node
signal inspection).
These functions may be overridden in special circumstances,
as long as this is done after calling
ieee80211_ifattach(9)
and prior to any other call which may allocate a node.
The
ieee80211_node_lateattach()
function initialises the
ic_bss
node element of the interface
ic
during
ieee80211_media_init(9).
This late attachment is to account for certain special cases described under
ieee80211_node_attach().
The
ieee80211_node_detach()
function destroys all node database state associated with the interface
ic
,
and is usually called during device detach.
The
ieee80211_begin_scan()
function initialises the node database in preparation of a
scan for an access point on the interface
ic
and begins the scan.
The parameter
reset
controls if a previously built node list should be cleared.
The actual scanning for an access point is not fully automated:
the device driver itself controls stepping through the channels, usually
by a periodical callback.
The
ieee80211_next_scan()
function is used to inform the
ieee80211(9)
layer that the next channel for interface
ic
should be scanned.
The
ieee80211_create_ibss()
function sets up the net80211-specific portion of an interface's softc,
ic
,
for use in IBSS mode.
The
ieee80211_end_scan()
function is called by
ieee80211_next_scan(
)
when the state machine has peformed a full cycle of scanning on
all available radio channels.
Internally,
ieee80211_end_scan(
)
will inspect the node cache associated with the interface
ic
for suitable access points found during scanning, and associate with one,
should the parameters of the node match those of the configuration
requested.
The
ieee80211_alloc_node()
function allocates an instance of
for a node having the MAC address
macaddr
,
and associates it with the node table
nt
.
If the allocation is successful, the node structure is initialised by
ieee80211_setup_node();
otherwise,
NULL
is returned.
The
ieee80211_dup_bss()
function is similar to
ieee80211_alloc_node(
),
but is instead used to create a node database entry for the BSSID
macaddr
associated with the note table
nt
.
If the allocation is successful, the node structure is initialised by
ieee80211_setup_node();
otherwise,
NULL
is returned.
The
ieee80211_find_node()
function will iterate through the node table
nt
,
searching for a node entry which matches
macaddr
.
If the entry is found, its reference count is incremented, and
a pointer to the node is returned; otherwise,
NULL
is returned.
The
ieee80211_free_allnodes()
function will iterate through the node list calling
ieee80211_free_node(
)
for all the nodes in table
nt
.
The
ieee80211_iterate_nodes()
function will call the user-defined callback function
f
for all nodes in the table
nt
.
The callback is invoked with the with the user-supplied value
arg
and a pointer to the current node.
This man page was written by Bruce M. Simpson <bms@FreeBSD.org> and Darron Broad <darron@kewl.org>.