ieee80211_wep_decrypt_data
res = ieee80211_wep_decrypt_data(ctx, rc4key, 16, pos, payload_len - 12);
if (ieee80211_wep_decrypt_data(&local->wep_rx_ctx, rc4key, klen,
int ieee80211_wep_decrypt_data(struct arc4_ctx *ctx, u8 *rc4key,