ieee80211_add_xrates
p = ieee80211_add_xrates(p, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
frm = ieee80211_add_xrates(frm, rs);
frm = ieee80211_add_xrates(frm, rs);
uint8_t *ieee80211_add_xrates(uint8_t *, const struct ieee80211_rateset *);