ieee80211_crypto_attach, ieee80211_crypto_detach, ieee80211_wep_crypt - 802.11 WEP encryption functions

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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

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.

The ieee80211_wep_crypt function stores its IV in the interface’s embedded
.Vt struct ieee80211com instance.

awi(4), wi(4), arc4random(9), ieee80211(9), ifnet(9)

The ieee80211 series of functions first appeared in
.Nx 1.5 , and were later ported to
.Fx 4.6 .

.An -nosplit This manual page was written by
.An Bruce M. Simpson Aq bms@FreeBSD.org and
.An Darron Broad Aq darron@kewl.org .

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