Symbol: ipf_nat6_checkin
sys/netpfil/ipfilter/netinet/fil.c
2950
if (ipf_nat6_checkin(fin, &pass) == -1) {
sys/netpfil/ipfilter/netinet/ip_nat.h
740
extern int ipf_nat6_checkin(fr_info_t *, u_32_t *);