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ieee80211_crypto_attach.9freebsd

Langue: en

Version: 306211 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)


BSD mandoc

NAME

ieee80211_crypto_attach , ieee80211_crypto_detach , ieee80211_wep_crypt - 802.11 WEP encryption functions

SYNOPSIS

Ft void Fn ieee80211_crypto_attach struct ifnet *ifp Ft void Fn ieee80211_crypto_detach struct ifnet *ifp Ft struct mbuf * Fn ieee80211_wep_crypt struct ifnet *ifp struct mbuf *m0 int txflag

DESCRIPTION

These functions provide software encryption support for 802.11 device drivers.

The Fn ieee80211_crypto_attach function initializes crypto support for the interface Fa ifp , and sets the initialization vector (IV) for WEP encryption to a random number derived from a secure PRNG.

The Fn ieee80211_crypto_detach function frees data structures associated with crypto support for the interface Fa ifp .

The Fn ieee80211_wep_crypt function runs the appropriate WEP encryption algorithm over the 802.11 encapsulated frame held in the mbuf chain Fa m0 , for transmission or reception on the interface Fa ifp . The Fa 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 Fn ieee80211_wep_crypt function stores its IV in the interface's embedded Vt struct ieee80211com instance.

SEE ALSO

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

HISTORY

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

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 .
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