// common的flag掩码
pub const FLAGS_TYPE_MASK: u16 = 0x001f;
pub const FLAGS_BITS_MASK: u16 = 0xffe0;

// common头的flags里面的flag，可以组合
pub const SDLAN_FLAGS_FROM_SN: u16 = 0x0020;
pub const SDLAN_FLAGS_SOCKET: u16 = 0x0040;
pub const SDLAN_FLAGS_OPTIONS: u16 = 0x0080;

pub const IPV4_SIZE: u8 = 4;
pub const IPV6_SIZE: u8 = 16;

// add to LIST
pub enum SDLanSNOPER {
    SDLanSNAdd,
    SDLanSNAddSkip,
    SDLanSNAdded,
}

pub const AF_INET: u8 = 2;
pub const AF_INET6: u8 = 10;

pub const SDLAN_VERSION: u8 = 1;
pub const SDLAN_DEFAULT_TTL: u8 = 2;