ifa_ifwithaddr_fib_check
return (ifa_ifwithaddr_fib_check(addr, RT_ALL_FIBS));
int ifa_ifwithaddr_fib_check(const struct sockaddr *, int);
ifa_ifwithaddr_fib_check((const struct sockaddr *)&sin, fib) == 0)
if (ifa_ifwithaddr_fib_check((struct sockaddr *)gateway, fibnum))
ifa_ifwithaddr_fib_check((struct sockaddr *)addr, fib) == 0))