NAME
ieee80211_crypto_attach,
ieee80211_crypto_detach,
ieee80211_wep_crypt —
802.11 WEP encryption
functions
SYNOPSIS
void
ieee80211_crypto_attach(struct
ifnet *ifp);
void
ieee80211_crypto_detach(struct
ifnet *ifp);
struct mbuf *
ieee80211_wep_crypt(struct
ifnet *ifp, struct mbuf
*m0, int
txflag);
DESCRIPTION
These functions provide software encryption support for 802.11 device drivers.
The
ieee80211_crypto_attach()
function initializes crypto support for the interface
ifp, and sets the initialization vector (IV) for WEP
encryption to a random number derived from a secure PRNG.
The
ieee80211_crypto_detach()
function frees data structures associated with crypto support for the
interface ifp.
The
ieee80211_wep_crypt()
function runs the appropriate WEP encryption algorithm over the 802.11
encapsulated frame held in the mbuf chain m0, for
transmission or reception on the interface ifp. The
txflag argument specifies whether the frame is being
received or transmitted. A value of 0 indicates that the frame is being
received and should therefore be decrypted; a non-zero value indicates that
the frame is being transmitted and should be encrypted.
IMPLEMENTATION NOTES
The ieee80211_wep_crypt() function stores
its IV in the interface's embedded struct ieee80211com
instance.
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 <[email protected]> and Darron Broad <[email protected]>.