These functions provide encryption support for 802.11 device drivers.
The
ieee80211_crypto_attach() function initializes crypto support for the interface
ic. The default is null crypto.
The
ieee80211_crypto_detach() function frees data structures associated with crypto support for the interface
ic.
The two above functions are automatically called by the interface attach and detach routines, respectively.
The
ieee80211_crypto_encap() function encapsulates the packet supplied in mbuf
m0, with the crypto headers given the for node
ni. Software encryption is possibly performed. In case of no specified key for
ni or multicast traffic, the default key for the interface
ic is used for encapsulation. The key is returned in the case of successful encapsulation, otherwise
NULL is returned.