1.\" 2.\" Copyright (c) 2004 Bruce M. Simpson <bms@spc.org> 3.\" Copyright (c) 2004 Darron Broad <darron@kewl.org> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" $DragonFly: src/share/man/man9/ieee80211_crypto.9,v 1.2 2005/08/05 22:35:10 swildner Exp $ 29.\" $Id: ieee80211_crypto.9,v 1.2 2004/07/07 12:59:39 ru Exp $ 30.\" 31.Dd March 2, 2004 32.Dt IEEE80211_CRYPTO 9 33.Os 34.Sh NAME 35.Nm ieee80211_crypto_attach , 36.Nm ieee80211_crypto_detach , 37.Nm ieee80211_wep_crypt 38.Nd 802.11 WEP encryption functions 39.Sh SYNOPSIS 40.Ft void 41.Fn ieee80211_crypto_attach "struct ifnet *ifp" 42.Ft void 43.Fn ieee80211_crypto_detach "struct ifnet *ifp" 44.Ft struct mbuf * 45.Fn ieee80211_wep_crypt "struct ifnet *ifp" "struct mbuf *m0" "int txflag" 46.Sh DESCRIPTION 47These functions provide software encryption support 48for 802.11 device drivers. 49.Pp 50.\" 51The 52.Fn ieee80211_crypto_attach 53function initializes crypto support for the interface 54.Fa ifp , 55and sets the initialization vector (IV) for WEP encryption to 56a random number derived from a secure PRNG. 57.Pp 58.\" 59The 60.Fn ieee80211_crypto_detach 61function frees data structures associated with crypto support 62for the interface 63.Fa ifp . 64.Pp 65.\" 66The 67.Fn ieee80211_wep_crypt 68function runs the appropriate WEP encryption algorithm over the 802.11 69encapsulated frame held in the mbuf chain 70.Fa m0 , 71for transmission or reception on the interface 72.Fa ifp . 73The 74.Fa txflag 75argument specifies whether the frame is being received or transmitted. 76A value of 0 indicates that the frame is being received and should 77therefore be decrypted; a non-zero value indicates that the frame 78is being transmitted 79and should be encrypted. 80.\" 81.Sh IMPLEMENTATION NOTES 82The 83.Fn ieee80211_wep_crypt 84function stores its IV in the interface's embedded 85.Vt struct ieee80211com 86instance. 87.Sh SEE ALSO 88.Xr awi 4 , 89.Xr wi 4 , 90.Xr arc4random 9 , 91.Xr ieee80211 9 , 92.Xr ifnet 9 93.Sh HISTORY 94The 95.Nm ieee80211 96series of functions first appeared in 97.Nx 1.5 , 98and were later ported to 99.Fx 4.6 . 100.Sh AUTHORS 101.An -nosplit 102This man page was written by 103.An Bruce M. Simpson Aq bms@FreeBSD.org 104and 105.An Darron Broad Aq darron@kewl.org . 106