For an interface, obtain address, netmask, etc
any_address address() const; any_address netmask() const; any_address broadcast() const;
bool is_up() const; bool is_point_to_point() const; bool is_loopback() const; bool can_broadcast() const; bool can_multicast() const;
Obtain list of locally available interfaces.
DefaultConstructable? typedef .... iterator iterator begin() const iterator end() const
iterator::value_type == interface_info