pub mod hrd {
    pub const ETHER: u8 = 1;
    pub const EETHER: u8 = 2;
    pub const AX25: u8 = 3;
    pub const PRONET: u8 = 4;
    pub const CHAOS: u8 = 5;
    pub const IEEE802: u8 = 6;
    pub const ARCNET: u8 = 7;
    pub const APPLETLK: u8 = 8;
    pub const DLCI: u8 = 15;
    pub const ATM: u8 = 19;
    pub const MERICOM: u8 = 23;
    pub const IEEE1394: u8 = 24;
    pub const EUI64: u8 = 27;
    pub const INFINIBAND: u8 = 32;
}
