if (stype & IEEE80211_STYPE_QOS_DATA) hdrlen += 2;
extern inline int ieee80211_get_hdrlen(u16 fc){	int hdrlen = IEEE80211_3ADDR_LEN;	switch (WLAN_FC_GET_TYPE(fc)) {	case IEEE80211_FTYPE_DATA:		if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))			hdrlen = IEEE80211_4ADDR_LEN;		break;	case IEEE80211_FTYPE_CTL:		switch (WLAN_FC_GET_STYPE(fc)) {		case IEEE80211_STYPE_CTS:		case IEEE80211_STYPE_ACK:			hdrlen = IEEE80211_1ADDR_LEN;			break;		default:			hdrlen = IEEE80211_2ADDR_LEN;			break;		}		break;	}	return hdrlen;}