pn_hdr
struct phonethdr *ph = pn_hdr(skb);
struct phonethdr *ph = pn_hdr(skb);
ph = pn_hdr(skb);
ph = pn_hdr(skb);
ph = pn_hdr(skb); /* re-acquires the pointer */
const struct phonethdr *oph = pn_hdr(rskb);
struct phonethdr *oph = pn_hdr(rskb);
ph = pn_hdr(skb);