Retrieves the hop limit of Ipv4 multicast packets sent over this socket.
impl Socket {
fn ipv4_multicast_hop_limit(&self) -> Result<u8, Errno>
}Returns the hop limit of Ipv4 multicast packets sent over this socket.
This option is only available for Ipv4 sockets. The default value is 1 so that multicast packets don't leave the local network.
ip(7) and IP_MULTICAST_TTL therein