tsol_getrhbyaddr
rh = tsol_getrhbyaddr(v4_addr, sizeof (v4_addr), AF_INET);
rh = tsol_getrhbyaddr(v6_addr, sizeof (v6_addr), AF_INET6);
(rhentp = tsol_getrhbyaddr(abuf, alen+1,
extern tsol_rhent_t *tsol_getrhbyaddr(const void *, size_t, int);