rtwn_tx_radiotap_header
struct rtwn_tx_radiotap_header *txtap = &sc->sc_txtap;
struct rtwn_tx_radiotap_header *tap = &sc->sc_txtap;
struct rtwn_tx_radiotap_header *tap = &sc->sc_txtap;
struct rtwn_tx_radiotap_header sc_txtap;