{
    "type" : "node",
    "name" : "gtpc",
    "layout" : [
        {
            "name" : "version",
            "size" : "3",
            "default" : "2",
            "readonly" : "true"
        },
        {
            "name" : "p",
            "size" : "1"
        },
        {
            "name" : "t",
            "size" : "1"
        },
        {
            "name" : "reserved",
            "size" : "3"
        },
        {
            "name" : "messagetype",
            "size" : "8"
        },
        {
            "name" : "messagelength",
            "size" : "16",
            "default" : "4",
            "autoincrease" : "true"
        },
        {
            "name" : "teid",
            "size" : "32",
            "optional" : "t=1",
            "increaselength" : "true"
        },
        {
            "name" : "sequencenumber",
            "size" : "24"
        },
        {
            "name" : "reserved",
            "size" : "8"
        }
    ]
}