int link_update_monitor(Link *l);
bool link_relevant(Link *l, int family);
LinkAddress* link_find_address(Link *l, int family, const union in_addr_union *in_addr);
int link_update_monitor(Link *l);
bool link_relevant(Link *l, int family);
LinkAddress* link_find_address(Link *l, int family, const union in_addr_union *in_addr);