### ip::multicast::enable_loopback

Socket option determining whether outgoing multicast packets will be received on the same socket if it is a member of the multicast group.

    typedef implementation_defined enable_loopback;

Implements the IPPROTO_IP/IP_MULTICAST_LOOP socket option.

##### Examples

Setting the option:

    asio::ip::udp::socket socket(io_context);
    ...
    asio::ip::multicast::enable_loopback option(true);
    socket.set_option(option);

Getting the current option value:

    asio::ip::udp::socket socket(io_context);
    ...
    asio::ip::multicast::enable_loopback option;
    socket.get_option(option);
    bool is_set = option.value();

##### Requirements

Header: `asio/ip/multicast.hpp`

Convenience header: `asio.hpp`