h2c              1415 net/pf.c           struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c,
h2c              1442 net/pf.c       		u_int32_t	 oh2c = *h2c;
h2c              1444 net/pf.c       		*h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c,
h2c              1450 net/pf.c       		*ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0);