Symbol: fr_checknat6in
usr/src/uts/common/inet/ipf/fil.c
2523
if (fr_checknat6in(fin, &pass) == -1) {
usr/src/uts/common/inet/ipf/netinet/ip_nat.h
527
extern int fr_checknat6in __P((fr_info_t *, u_32_t *));