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IEEE80211_CRYPTO_ATTACH(9) Kernel Developer's Manual IEEE80211_CRYPTO_ATTACH(9)

ieee80211_crypto_attach, ieee80211_crypto_detach, ieee80211_wep_crypt802.11 WEP encryption functions

ieee80211_crypto_attach(struct ifnet *ifp);

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 () 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 () function frees data structures associated with crypto support for the interface ifp.

The () 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 struct ieee80211com instance.


The ieee80211 series of functions first appeared in NetBSD 1.5, and were later ported to FreeBSD 4.6 and OpenBSD 3.6.

This man page was written by Bruce M. Simpson <> and Darron Broad <>.

November 23, 2015 OpenBSD-6.4