NAME
ieee80211_encap,
ieee80211_add_rates,
ieee80211_add_xrates,
ieee80211_send_mgmt —
software 802.11 stack output
functions
SYNOPSIS
#include
<net80211/ieee80211_var.h>
#include
<net80211/ieee80211_proto.h>
struct mbuf *
ieee80211_encap(struct ifnet
*ifp, struct mbuf *m, struct
ieee80211_node **pni);
u_int8_t *
ieee80211_add_rates(u_int8_t
*frm, const struct
ieee80211_rateset *rs);
u_int8_t *
ieee80211_add_xrates(u_int8_t
*frm, const struct
ieee80211_rateset *rs);
int
ieee80211_send_mgmt(struct
ieee80211com *ic, struct ieee80211_node *ni,
int type, int arg);
DESCRIPTION
These functions handle the encapsulation and transmission of 802.11 frames within the software 802.11 stack.
The
ieee80211_encap()
function encapsulates an outbound data frame contained within the mbuf chain
m from the interface ifp. The
argument *pni is a reference to the destination
node.
If the function is successful, the mbuf chain is updated with the
802.11 frame header prepended, and a pointer to the head of the chain is
returned. If an error occurs, NULL will be returned,
and *pni is also set to NULL.
The caller is responsible for freeing the node reference if
*pni is non-NULL on return.
The convention is that ic_bss is not reference
counted; the caller is responsible for maintaining this reference count.
The
ieee80211_add_rates()
utility function is used to add the rate set element
*rs to the frame frm. A pointer
to the location in the buffer after the addition of the rate set is
returned. It is typically used when constructing management frames from
within the software 802.11 stack.
The
ieee80211_add_xrates()
utility function is used to add the extended rate set element
*rs to the frame frm. A pointer
to the location in the buffer after the addition of the rate set is
returned. It is typically used when constructing management frames from
within the software 802.11 stack in 802.11g mode.
The
ieee80211_send_mgmt()
function transmits a management frame on the interface
ic to the destination node ni of
type type.
The argument arg specifies either a sequence number for authentication operations, a status code for [re]association operations, or a reason for deauthentication and deassociation operations.
Nodes other than ic_bss have their reference count incremented to reflect their use for an indeterminate amount of time. This reference is freed when the function returns.
The function returns 0 if successful; if temporary buffer space is
not available, the function returns ENOMEM.
SEE ALSO
HISTORY
The ieee80211 series of functions first
appeared in NetBSD 1.5, and were later ported to
FreeBSD 4.6 and OpenBSD
3.6.
AUTHORS
This man page was written by Bruce M. Simpson <bms@FreeBSD.org> and Darron Broad <darron@kewl.org>.