#include "../netinet/in.h"
#include "../netinet/in_pcb.h"
#include "../netinet/in_systm.h"
#include "../netinet/in.h"
#include "../netinet/in_pcb.h"
#include "../netinet/in_systm.h"
ip = mtod(m, struct ip *);
if ((hlen = ip->ip_hl << 2) > m->m_len) {
ip = mtod(m, struct ip *);
if ((hlen = ip->ip_hl << 2) > m->m_len) {