152 lines
4.5 KiB
Groff
152 lines
4.5 KiB
Groff
.\"
|
|
.\" Copyright (c) 2004 Bruce M. Simpson <bms@spc.org>
|
|
.\" Copyright (c) 2004 Darron Broad <darron@kewl.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\" $Id: ieee80211_output.9,v 1.5 2004/03/04 12:31:18 bruce Exp $
|
|
.\"
|
|
.Dd March 2, 2004
|
|
.Dt IEEE80211_OUTPUT 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ieee80211_encap , ieee80211_add_rates ,
|
|
.Nm ieee80211_add_xrates , ieee80211_send_mgmt
|
|
.Nd software 802.11 stack output functions
|
|
.Sh SYNOPSIS
|
|
.In net80211/ieee80211_var.h
|
|
.In net80211/ieee80211_proto.h
|
|
.Ft struct mbuf *
|
|
.Fo ieee80211_encap
|
|
.Fa "struct ifnet *ifp" "struct mbuf *m" "struct ieee80211_node **pni"
|
|
.Fc
|
|
.Ft u_int8_t *
|
|
.Fn ieee80211_add_rates "u_int8_t *frm" "const struct ieee80211_rateset *rs"
|
|
.Ft u_int8_t *
|
|
.Fn ieee80211_add_xrates "u_int8_t *frm" "const struct ieee80211_rateset *rs"
|
|
.Ft int
|
|
.Fo ieee80211_send_mgmt
|
|
.Fa "struct ieee80211com *ic" "struct ieee80211_node *ni" "int type" "int arg"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
These functions handle the encapsulation and transmission of 802.11 frames
|
|
within the software 802.11 stack.
|
|
.Pp
|
|
The
|
|
.Fn ieee80211_encap
|
|
function encapsulates an outbound data frame contained within the
|
|
mbuf chain
|
|
.Fa m
|
|
from the interface
|
|
.Fa ifp .
|
|
The argument
|
|
.Fa *pni
|
|
is a reference to the destination node.
|
|
.Pp
|
|
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,
|
|
.Dv NULL
|
|
will be returned, and
|
|
.Fa *pni
|
|
is also set to
|
|
.Dv NULL .
|
|
The caller is responsible for freeing the node reference if
|
|
.Fa *pni
|
|
is
|
|
.Pf non- Dv NULL
|
|
on return.
|
|
The convention is that
|
|
.Va ic_bss
|
|
is not reference counted; the caller is responsible for maintaining this
|
|
reference count.
|
|
.Pp
|
|
.\"
|
|
The
|
|
.Fn ieee80211_add_rates
|
|
utility function is used to add the rate set element
|
|
.Fa *rs
|
|
to the frame
|
|
.Fa 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.
|
|
.Pp
|
|
.\"
|
|
The
|
|
.Fn ieee80211_add_xrates
|
|
utility function is used to add the extended rate set element
|
|
.Fa *rs
|
|
to the frame
|
|
.Fa 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.
|
|
.Pp
|
|
.\"
|
|
The
|
|
.Fn ieee80211_send_mgmt
|
|
function transmits a management frame on the interface
|
|
.Fa ic
|
|
to the destination node
|
|
.Fa ni
|
|
of type
|
|
.Fa type .
|
|
.Pp
|
|
The argument
|
|
.Fa arg
|
|
specifies either a sequence number for authentication operations,
|
|
a status code for [re]association operations,
|
|
or a reason for deauthentication and deassociation operations.
|
|
.Pp
|
|
Nodes other than
|
|
.Va 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.
|
|
.Pp
|
|
The function returns 0 if successful; if temporary buffer space is not
|
|
available, the function returns
|
|
.Er ENOMEM .
|
|
.\"
|
|
.Sh SEE ALSO
|
|
.Xr ieee80211 9 ,
|
|
.Xr ifnet 9
|
|
.Sh HISTORY
|
|
The
|
|
.Nm ieee80211
|
|
series of functions first appeared in
|
|
.Nx 1.5 ,
|
|
and were later ported to
|
|
.Fx 4.6 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
This manual page was written by
|
|
.An Bruce M. Simpson Aq bms@FreeBSD.org
|
|
and
|
|
.An Darron Broad Aq darron@kewl.org .
|