{
    "type" : "node",
    "name" : "tcp",
    "layout" : [
        {
            "name" : "src",
            "size" : "16"
        },
        {
            "name" : "dst",
            "size" : "16"
        },
        {
            "name" : "sequencenumber",
            "size" : "32"
        },
        {
            "name" : "acknowledgementnumber",
            "size" : "32"
        },
        {
            "name" : "dataoffset",
            "size" : "4",
            "default" : "5"
        },
        {
            "name" : "reserved",
            "size" : "3"
        },
        {
            "name" : "ns",
            "size" : "1"
        },
        {
            "name" : "cwr",
            "size" : "1"
        },
        {
            "name" : "ece",
            "size" : "1"
        },
        {
            "name" : "urg",
            "size" : "1"
        },
        {
            "name" : "ack",
            "size" : "1"
        },
        {
            "name" : "psh",
            "size" : "1"
        },
        {
            "name" : "pst",
            "size" : "1"
        },
        {
            "name" : "syn",
            "size" : "1"
        },
        {
            "name" : "fin",
            "size" : "1"
        },
        {
            "name" : "windowsize",
            "size" : "16"
        },
        {
            "name" : "checksum",
            "size" : "16"
        },
        {
            "name" : "urgentpointer",
            "size" : "16"
        }
    ]
}