in_host_route_add
in_host_route_add(&ppp->ppp_framed_ip_address,
in_host_route_add(&ppp->
in_host_route_add(&_this->ip4addr, &gw, LOOPBACK_IFNAME, 0);
int in_host_route_add (struct in_addr *, struct in_addr *, const char *, int);