ieee802154_hdr_peek
int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
if (ieee802154_hdr_peek(skb, &wpan_hdr) < 0) {
EXPORT_SYMBOL_GPL(ieee802154_hdr_peek);
if (ieee802154_hdr_peek(skb, &hdr) < 0)