Interface IPv4

interface IPv4 {
    checksum: number;
    data: L4;
    dest: string;
    DSCP: number;
    ECN: number;
    flags: Set<IPv4flags>;
    frag_offset: number;
    id: number;
    IHL: number;
    length: number;
    opts: number[];
    protocol: string | number;
    src: string;
    ttl: number;
    type: "ipv4";
    version: number;
}