ipsec6_process_packet
error = ipsec6_process_packet(m, sp->req, 0);
error = ipsec6_process_packet(m, sp->req, flags);
int ipsec6_process_packet(struct mbuf *, const struct ipsecrequest *, int);
return ipsec6_process_packet(m, isr->next, flags);
__weak_alias(ipsec6_process_packet,rumpnet_stub);