Class ifaddrmsg_rtattr

scapy/arch/linux/rtnetlink.py:422–481

class ifaddrmsg_rtattr(Packet):
    fields_desc = [
        FieldLenField(
            "rta_len", None, length_of="rta_data", fmt="=H", adjust=lambda _, x: x + 4
        ),
        EnumField(
            "rta_type",
            0,
            {
                0x00: "IFA_UNSPEC",
                0x01: "IFA_ADDRESS",
                0x02: "IFA_LOCAL",
                0x03: "IFA_LABEL",
                0x04: "IFA_BROADCAST",
                0x05: "IFA_ANYCAST",
                0x06: "IFA_CACHEINFO",
                0x07: "IFA_MULTICAST",
                0x08: "IFA_FLAGS",
                0x09: "IFA_RT_PRIORITY",
                0x0A: "IFA_TARGET_NETNSID",
                0x0B: "IFA_PROTO",
            },
            fmt="=H",
        ),
        PadField(
            MultipleTypeField(
                [
                    # IFA_ADDRESS, IFA_LOCAL, IFA_BROADCAST
                    (
                        IPField("rta_data", "0.0.0.0"),
                        lambda pkt: pkt.parent
                        and pkt.parent.ifa_family == 2
                        and pkt.rta_type in [0x01, 0x02, 0x04],
                    ),
                    (
                        IP6Field("rta_data", "::"),
                        lambda pkt: pkt.parent
                        and pkt.parent.ifa_family == 10
                        and pkt.rta_type in [0x01, 0x02, 0x04],
                    ),
                    (
                        # IFA_LABEL
                        StrLenField(
                            "rta_data", b"", length_from=lambda pkt: pkt.rta_len - 4
                        ),
                        lambda pkt: pkt.rta_type in [0x03],
                    ),
                ],
                XStrLenField(
                    "rta_data",
                    b"",
                    length_from=lambda pkt: pkt.rta_len - 4,
                ),
            ),
            align=4,
        ),
    ]