// --| utility functions |--

static inline u_int32_t 
msr_ipid(iphdr_t *iph)
{
  return (u_int32_t)ntohs(iph->ip_id);
}
static inline u_int32_t 
msr_iptos(iphdr_t *iph)
{
  return (u_int32_t) (iph->ip_tos);		// 1-byte field (no swap)
}
static inline u_int32_t 
msr_ipttl(iphdr_t *iph)
{
  return (u_int32_t) (iph->ip_ttl);		// 1-byte field (no swap)
}