Function key_setsadbxport

freebsd/netipsec/key.c:3942–3964

* Set a port in sadb_x_nat_t_port. * In contrast to default RFC 2367 behaviour, port is in network byte order. */

 * In contrast to default RFC 2367 behaviour, port is in network byte order.
 */
static struct mbuf *
key_setsadbxport(u_int16_t port, u_int16_t type)
{
	struct mbuf *m;
	size_t len;
	struct sadb_x_nat_t_port *p;

	len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));

	m = m_get2(len, M_NOWAIT, MT_DATA, 0);
	if (m == NULL)
		return (NULL);
	m_align(m, len);
	m->m_len = len;
	p = mtod(m, struct sadb_x_nat_t_port *);

	bzero(p, len);
	p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
	p->sadb_x_nat_t_port_exttype = type;
	p->sadb_x_nat_t_port_port = port;

	return (m);
}

/*
 * Get port from sockaddr. Port is in network byte order.