V_in_ifaddrhashtbl
(&V_in_ifaddrhashtbl[INADDR_HASHVAL(x) & V_in_ifaddrhmask])
V_in_ifaddrhashtbl = hashinit(INADDR_NHASH, M_IFADDR, &V_in_ifaddrhmask);
hashdestroy(V_in_ifaddrhashtbl, M_IFADDR, V_in_ifaddrhmask);