class ConfClass(object):
class Interceptor(object):
class ProgPath(ConfClass):
class ConfigFieldList:
class Emphasize(ConfigFieldList):
class Resolve(ConfigFieldList):
class Num2Layer:
class LayersList(List[Type['scapy.packet.Packet']]):
class CommandsList(List[Callable[..., Any]]):
class CacheInstance(Dict[str, Any], object):
class NetCache:
class Conf(ConfClass):
    def configure(self, cnf):
    def __repr__(self):
    def __str__(self):
    def __init__(self,
                 name,  # type: str
                 default,  # type: Any
                 hook,  # type: Callable[..., Any]
                 args=None,  # type: Optional[List[Any]]
                 kargs=None  # type: Optional[Dict[str, Any]]
                 ):
    def __get__(self, obj, typ=None):
    def set_from_hook(obj, name, val):
    def __set__(self, obj, val):
def _readonly(name):
    def __init__(self):
    def _is_field(f):
    def _recalc_layer_list(self):
    def add(self, *flds):
    def remove(self, *flds):
    def __contains__(self, elt):
    def __repr__(self):
    def __init__(self):
    def register(self, num, layer):
    def register_num2layer(self, num, layer):
    def register_layer2num(self, num, layer):
    def __getitem__(self, item):
    def __contains__(self, item):
    def get(self,
            item,  # type: Union[int, Type[Packet]]
            default=None,  # type: Optional[Type[Packet]]
            ):
    def __repr__(self):
    def __init__(self):
    def __repr__(self):
    def register(self, layer):
    def layers(self):
    def filter(self, items):
    def unfilter(self):
    def __repr__(self):
    def register(self, cmd):
def lsc():
    def __init__(self, name="noname", timeout=None):
    def flush(self):
    def __getitem__(self, item):
    def get(self, item, default=None):
    def __setitem__(self, item, v):
    def update(self,  # type: ignore
               other,  # type: Any
               **kwargs  # type: Any
               ):
    def iteritems(self):
    def iterkeys(self):
    def __iter__(self):
    def itervalues(self):
    def items(self):
    def keys(self):
    def values(self):
    def __len__(self):
    def summary(self):
    def __repr__(self):
    def copy(self):
    def __init__(self):
    def add_cache(self, cache):
    def new_cache(self, name, timeout=None):
    def __delattr__(self, attr):
    def update(self, other):
    def flush(self):
    def __repr__(self):
def _version_checker(module, minver):
def isCryptographyValid():
def isCryptographyAdvanced():
def isPyPy():
def _prompt_changer(attr, val, old):
def _set_conf_sockets():
def _socket_changer(attr, val, old):
def _loglevel_changer(attr, val, old):
def _iface_changer(attr, val, old):
    def __getattribute__(self, attr):
def crypto_validator(func):
    def func_in(*args, **kwargs):
def scapy_delete_temp_files(): class Packet(six.with_metaclass(Packet_metaclass,  # type: ignore
             BasePacket, _CanvasDumpExtended)):
    __slots__ = [
        "time", "sent_time", "name",
        "default_fields", "fields", "fieldtype",
        "overload_fields", "overloaded_fields",
        "packetfields",
        "original", "explicit", "raw_packet_cache",
        "raw_packet_cache_fields", "_pkt", "post_transforms",
        # then payload and underlayer
        "payload", "underlayer",
        "name",
        # used for sr()
        "_answered",
        # used when sniffing
        "direction", "sniffed_on",
        # handle snaplen Vs real length
        "wirelen",
    ]
    name = None
    fields_desc = []  # type: Sequence[AnyField]
    deprecated_fields = {}  # type: Dict[str, Tuple[str, str]]
    overload_fields = {}  # type: Dict[Type[Packet], Dict[str, Any]]
    payload_guess = []  # type: List[Tuple[Dict[str, Any], Type[Packet]]]
    show_indent = 1
    show_summary = True
    match_subclass = False
    class_dont_cache = {}  # type: Dict[Type[Packet], bool]
    class_packetfields = {}  # type: Dict[Type[Packet], Any]
    class_default_fields = {}  # type: Dict[Type[Packet], Dict[str, Any]]
    class_default_fields_ref = {}  # type: Dict[Type[Packet], List[str]]
    class_fieldtype = {}  # type: Dict[Type[Packet], Dict[str, AnyField]]  # noqa: E501

    @classmethod
    def from_hexcap(cls):
        # type: (Type[Packet]) -> Packet
        return cls(import_hexcap())

    @classmethod
    def upper_bonds(self):
        # type: () -> None
        for fval, upper in self.payload_guess:
            print("%-20s  %s" % (upper.__name__, ", ".join("%-12s" % ("%s=%r" % i) for i in six.iteritems(fval))))  # noqa: E501

    @classmethod
    def lower_bonds(self):
        # type: () -> None
        for lower, fval in six.iteritems(self._overload_fields):
            print("%-20s  %s" % (lower.__name__, ", ".join("%-12s" % ("%s=%r" % i) for i in six.iteritems(fval))))  # noqa: E501

    def __init__(self,
                 _pkt=b"",  # type: bytes
                 post_transform=None,  # type: Any
                 _internal=0,  # type: int
                 _underlayer=None,  # type: Optional[Packet]
                 **fields  # type: Any
                 ):
        # type: (...) -> None
        self.time = time.time()  # type: Union[EDecimal, float]
        self.sent_time = None  # type: Union[EDecimal, float, None]
        self.name = (self.__class__.__name__
                     if self._name is None else
                     self._name)
        self.default_fields = {}  # type: Dict[str, Any]
        self.overload_fields = self._overload_fields
        self.overloaded_fields = {}  # type: Dict[str, Any]
        self.fields = {}  # type: Dict[str, Any]
        self.fieldtype = {}  # type: Dict[str, AnyField]
        self.packetfields = []  # type: List[AnyField]
        self.payload = NoPayload()
        self.init_fields()
        self.underlayer = _underlayer
        self.original = _pkt
        self.explicit = 0
        self.raw_packet_cache = None  # type: Optional[bytes]
        self.raw_packet_cache_fields = None  # type: Optional[Dict[str, Any]]  # noqa: E501
        self.wirelen = None  # type: Optional[int]
        self.direction = None  # type: Optional[int]
        self.sniffed_on = None  # type: Optional[_GlobInterfaceType]
        if _pkt:
            self.dissect(_pkt)
            if not _internal:
                self.dissection_done(self)
        # We use this strange initialization so that the fields
        # are initialized in their declaration order.
        # It is required to always support MultipleTypeField
        for field in self.fields_desc:
            fname = field.name
            try:
                value = fields.pop(fname)
            except KeyError:
                continue
            self.fields[fname] = self.get_field(fname).any2i(self, value)
        # The remaining fields are unknown
        for fname in fields:
            if fname in self.deprecated_fields:
                # Resolve deprecated fields
                value = fields[fname]
                fname = self._resolve_alias(fname)
                self.fields[fname] = self.get_field(fname).any2i(self, value)
                continue
            raise AttributeError(fname)
        if isinstance(post_transform, list):
            self.post_transforms = post_transform
        elif post_transform is None:
            self.post_transforms = []
        else:
            self.post_transforms = [post_transform]

    _PickleType = Tuple[
        Union[EDecimal, float],
        Optional[Union[EDecimal, float, None]],
        Optional[int],
        Optional[_GlobInterfaceType],
        Optional[int]
    ]

    def __reduce__(self):
        # type: () -> Tuple[Type[Packet], Tuple[bytes], Packet._PickleType]
        """Used by pickling methods"""
        return (self.__class__, (self.build(),), (
            self.time,
            self.sent_time,
            self.direction,
            self.sniffed_on,
            self.wirelen,
        ))

    def __setstate__(self, state):
        # type: (Packet._PickleType) -> Packet
        """Rebuild state using pickable methods"""
        self.time = state[0]
        self.sent_time = state[1]
        self.direction = state[2]
        self.sniffed_on = state[3]
        self.wirelen = state[4]
        return self

    def __deepcopy__(self,
                     memo,  # type: Any
                     ):
        # type: (...) -> Packet
        """Used by copy.deepcopy"""
        return self.copy()

    def init_fields(self):
        # type: () -> None
        """
        Initialize each fields of the fields_desc dict
        """

        if self.class_dont_cache.get(self.__class__, False):
            self.do_init_fields(self.fields_desc)
        else:
            self.do_init_cached_fields()

    def do_init_fields(self,
                       flist,  # type: Sequence[AnyField]
                       ):
        # type: (...) -> None
        """
        Initialize each fields of the fields_desc dict
        """
        default_fields = {}
        for f in flist:
            default_fields[f.name] = copy.deepcopy(f.default)
            self.fieldtype[f.name] = f
            if f.holds_packets:
                self.packetfields.append(f)
        # We set default_fields last to avoid race issues
        self.default_fields = default_fields

    def do_init_cached_fields(self):
        # type: () -> None
        """
        Initialize each fields of the fields_desc dict, or use the cached
        fields information
        """

        cls_name = self.__class__

        # Build the fields information
        if Packet.class_default_fields.get(cls_name, None) is None:
            self.prepare_cached_fields(self.fields_desc)

        # Use fields information from cache
        default_fields = Packet.class_default_fields.get(cls_name, None)
        if default_fields:
            self.default_fields = default_fields
            self.fieldtype = Packet.class_fieldtype[cls_name]
            self.packetfields = Packet.class_packetfields[cls_name]

            # Deepcopy default references
            for fname in Packet.class_default_fields_ref[cls_name]:
                value = self.default_fields[fname]
                try:
                    self.fields[fname] = value.copy()
                except AttributeError:
                    # Python 2.7 - list only
                    self.fields[fname] = value[:]

    def prepare_cached_fields(self, flist):
        # type: (Sequence[AnyField]) -> None
        """
        Prepare the cached fields of the fields_desc dict
        """

        cls_name = self.__class__

        # Fields cache initialization
        if not flist:
            return

        class_default_fields = dict()
        class_default_fields_ref = list()
        class_fieldtype = dict()
        class_packetfields = list()

        # Fields initialization
        for f in flist:
            if isinstance(f, MultipleTypeField):
                # Abort
                self.class_dont_cache[cls_name] = True
                self.do_init_fields(self.fields_desc)
                return

            tmp_copy = copy.deepcopy(f.default)
            class_default_fields[f.name] = tmp_copy
            class_fieldtype[f.name] = f
            if f.holds_packets:
                class_packetfields.append(f)

            # Remember references
            if isinstance(f.default, (list, dict, set, RandField, Packet)):
                class_default_fields_ref.append(f.name)

        # Apply
        Packet.class_default_fields_ref[cls_name] = class_default_fields_ref
        Packet.class_fieldtype[cls_name] = class_fieldtype
        Packet.class_packetfields[cls_name] = class_packetfields
        # Last to avoid racing issues
        Packet.class_default_fields[cls_name] = class_default_fields

    def dissection_done(self, pkt):
        # type: (Packet) -> None
        """DEV: will be called after a dissection is completed"""
        self.post_dissection(pkt)
        self.payload.dissection_done(pkt)

    def post_dissection(self, pkt):
        # type: (Packet) -> None
        """DEV: is called after the dissection of the whole packet"""
        pass

    def get_field(self, fld):
        # type: (str) -> AnyField
        """DEV: returns the field instance from the name of the field"""
        return self.fieldtype[fld]

    def add_payload(self, payload):
        # type: (Union[Packet, bytes]) -> None
        if payload is None:
            return
        elif not isinstance(self.payload, NoPayload):
            self.payload.add_payload(payload)
        else:
            if isinstance(payload, Packet):
                self.payload = payload
                payload.add_underlayer(self)
                for t in self.aliastypes:
                    if t in payload.overload_fields:
                        self.overloaded_fields = payload.overload_fields[t]
                        break
            elif isinstance(payload, (bytes, str, bytearray, memoryview)):
                self.payload = conf.raw_layer(load=bytes_encode(payload))
            else:
                raise TypeError("payload must be 'Packet', 'bytes', 'str', 'bytearray', or 'memoryview', not [%s]" % repr(payload))  # noqa: E501

    def remove_payload(self):
        # type: () -> None
        self.payload.remove_underlayer(self)
        self.payload = NoPayload()
        self.overloaded_fields = {}

    def add_underlayer(self, underlayer):
        # type: (Packet) -> None
        self.underlayer = underlayer

    def remove_underlayer(self, other):
        # type: (Packet) -> None
        self.underlayer = None

    def copy(self):
        # type: () -> Packet
        """Returns a deep copy of the instance."""
        clone = self.__class__()
        clone.fields = self.copy_fields_dict(self.fields)
        clone.default_fields = self.copy_fields_dict(self.default_fields)
        clone.overloaded_fields = self.overloaded_fields.copy()
        clone.underlayer = self.underlayer
        clone.explicit = self.explicit
        clone.raw_packet_cache = self.raw_packet_cache
        clone.raw_packet_cache_fields = self.copy_fields_dict(
            self.raw_packet_cache_fields
        )
        clone.wirelen = self.wirelen
        clone.post_transforms = self.post_transforms[:]
        clone.payload = self.payload.copy()
        clone.payload.add_underlayer(clone)
        clone.time = self.time
        return clone

    def _resolve_alias(self, attr):
        # type: (str) -> str
        new_attr, version = self.deprecated_fields[attr]
        warnings.warn(
            "%s has been deprecated in favor of %s since %s !" % (
                attr, new_attr, version
            ), DeprecationWarning
        )
        return new_attr

    def getfieldval(self, attr):
        # type: (str) -> Any
        if self.deprecated_fields and attr in self.deprecated_fields:
            attr = self._resolve_alias(attr)
        if attr in self.fields:
            return self.fields[attr]
        if attr in self.overloaded_fields:
            return self.overloaded_fields[attr]
        if attr in self.default_fields:
            return self.default_fields[attr]
        return self.payload.getfieldval(attr)

    def getfield_and_val(self, attr):
        # type: (str) -> Tuple[AnyField, Any]
        if self.deprecated_fields and attr in self.deprecated_fields:
            attr = self._resolve_alias(attr)
        if attr in self.fields:
            return self.get_field(attr), self.fields[attr]
        if attr in self.overloaded_fields:
            return self.get_field(attr), self.overloaded_fields[attr]
        if attr in self.default_fields:
            return self.get_field(attr), self.default_fields[attr]
        raise ValueError

    def __getattr__(self, attr):
        # type: (str) -> Any
        try:
            fld, v = self.getfield_and_val(attr)
        except ValueError:
            return self.payload.__getattr__(attr)
        if fld is not None:
            return fld.i2h(self, v)
        return v

    def setfieldval(self, attr, val):
        # type: (str, Any) -> None
        if self.deprecated_fields and attr in self.deprecated_fields:
            attr = self._resolve_alias(attr)
        if attr in self.default_fields:
            fld = self.get_field(attr)
            if fld is None:
                any2i = lambda x, y: y  # type: Callable[..., Any]
            else:
                any2i = fld.any2i
            self.fields[attr] = any2i(self, val)
            self.explicit = 0
            self.raw_packet_cache = None
            self.raw_packet_cache_fields = None
            self.wirelen = None
        elif attr == "payload":
            self.remove_payload()
            self.add_payload(val)
        else:
            self.payload.setfieldval(attr, val)

    def __setattr__(self, attr, val):
        # type: (str, Any) -> None
        if attr in self.__all_slots__:
            return object.__setattr__(self, attr, val)
        try:
            return self.setfieldval(attr, val)
        except AttributeError:
            pass
        return object.__setattr__(self, attr, val)

    def delfieldval(self, attr):
        # type: (str) -> None
        if attr in self.fields:
            del(self.fields[attr])
            self.explicit = 0  # in case a default value must be explicit
            self.raw_packet_cache = None
            self.raw_packet_cache_fields = None
            self.wirelen = None
        elif attr in self.default_fields:
            pass
        elif attr == "payload":
            self.remove_payload()
        else:
            self.payload.delfieldval(attr)

    def __delattr__(self, attr):
        # type: (str) -> None
        if attr == "payload":
            return self.remove_payload()
        if attr in self.__all_slots__:
            return object.__delattr__(self, attr)
        try:
            return self.delfieldval(attr)
        except AttributeError:
            pass
        return object.__delattr__(self, attr)

    def _superdir(self):
        # type: () -> Set[str]
        """
        Return a list of slots and methods, including those from subclasses.
        """
        attrs = set()
        cls = self.__class__
        if hasattr(cls, '__all_slots__'):
            attrs.update(cls.__all_slots__)
        for bcls in cls.__mro__:
            if hasattr(bcls, '__dict__'):
                attrs.update(bcls.__dict__)
        return attrs

    def __dir__(self):
        # type: () -> List[str]
        """
        Add fields to tab completion list.
        """
        return sorted(itertools.chain(self._superdir(), self.default_fields))

    def __repr__(self):
        # type: () -> str
        s = ""
        ct = conf.color_theme
        for f in self.fields_desc:
            if isinstance(f, ConditionalField) and not f._evalcond(self):
                continue
            if f.name in self.fields:
                fval = self.fields[f.name]
                if isinstance(fval, (list, dict, set)) and len(fval) == 0:
                    continue
                val = f.i2repr(self, fval)
            elif f.name in self.overloaded_fields:
                fover = self.overloaded_fields[f.name]
                if isinstance(fover, (list, dict, set)) and len(fover) == 0:
                    continue
                val = f.i2repr(self, fover)
            else:
                continue
            if isinstance(f, Emph) or f in conf.emph:
                ncol = ct.emph_field_name
                vcol = ct.emph_field_value
            else:
                ncol = ct.field_name
                vcol = ct.field_value

            s += " %s%s%s" % (ncol(f.name),
                              ct.punct("="),
                              vcol(val))
        return "%s%s %s %s%s%s" % (ct.punct("<"),
                                   ct.layer_name(self.__class__.__name__),
                                   s,
                                   ct.punct("|"),
                                   repr(self.payload),
                                   ct.punct(">"))

    if six.PY2:
        def __str__(self):
            # type: () -> str
            return self.build()
    else:
        def __str__(self):
            # type: () -> str
            warning("Calling str(pkt) on Python 3 makes no sense!")
            return str(self.build())

    def __bytes__(self):
        # type: () -> bytes
        return self.build()

    def __div__(self, other):
        # type: (Any) -> Packet
        if isinstance(other, Packet):
            cloneA = self.copy()
            cloneB = other.copy()
            cloneA.add_payload(cloneB)
            return cloneA
        elif isinstance(other, (bytes, str, bytearray, memoryview)):
            return self / conf.raw_layer(load=bytes_encode(other))
        else:
            return other.__rdiv__(self)  # type: ignore
    __truediv__ = __div__

    def __rdiv__(self, other):
        # type: (Any) -> Packet
        if isinstance(other, (bytes, str, bytearray, memoryview)):
            return conf.raw_layer(load=bytes_encode(other)) / self
        else:
            raise TypeError
    __rtruediv__ = __rdiv__

    def __mul__(self, other):
        # type: (Any) -> List[Packet]
        if isinstance(other, int):
            return [self] * other
        else:
            raise TypeError

    def __rmul__(self, other):
        # type: (Any) -> List[Packet]
        return self.__mul__(other)

    def __nonzero__(self):
        # type: () -> bool
        return True
    __bool__ = __nonzero__

    def __len__(self):
        # type: () -> int
        return len(self.__bytes__())

    def copy_field_value(self, fieldname, value):
        # type: (str, Any) -> Any
        return self.get_field(fieldname).do_copy(value)

    def copy_fields_dict(self, fields):
        # type: (_T) -> _T
        if fields is None:
            return None
        return {fname: self.copy_field_value(fname, fval)
                for fname, fval in six.iteritems(fields)}

    def clear_cache(self):
        # type: () -> None
        """Clear the raw packet cache for the field and all its subfields"""
        self.raw_packet_cache = None
        for fld, fval in six.iteritems(self.fields):
            fld = self.get_field(fld)
            if fld.holds_packets:
                if isinstance(fval, Packet):
                    fval.clear_cache()
                elif isinstance(fval, list):
                    for fsubval in fval:
                        fsubval.clear_cache()
        self.payload.clear_cache()

    def self_build(self):
        # type: () -> bytes
        """
        Create the default layer regarding fields_desc dict

        :param field_pos_list:
        """
        if self.raw_packet_cache is not None:
            for fname, fval in six.iteritems(self.raw_packet_cache_fields):
                if self.getfieldval(fname) != fval:
                    self.raw_packet_cache = None
                    self.raw_packet_cache_fields = None
                    self.wirelen = None
                    break
            if self.raw_packet_cache is not None:
                return self.raw_packet_cache
        p = b""
        for f in self.fields_desc:
            val = self.getfieldval(f.name)
            if isinstance(val, RawVal):
                p += bytes(val)
            else:
                try:
                    p = f.addfield(self, p, val)
                except Exception as ex:
                    try:
                        ex.args = (
                            "While disescting field '%s': " % f.name +
                            ex.args[0],
                        ) + ex.args[1:]
                    except (AttributeError, IndexError):
                        pass
                    raise ex
        return p

    def do_build_payload(self):
        # type: () -> bytes
        """
        Create the default version of the payload layer

        :return: a string of payload layer
        """
        return self.payload.do_build()

    def do_build(self):
        # type: () -> bytes
        """
        Create the default version of the layer

        :return: a string of the packet with the payload
        """
        if not self.explicit:
            self = next(iter(self))
        pkt = self.self_build()
        for t in self.post_transforms:
            pkt = t(pkt)
        pay = self.do_build_payload()
        if self.raw_packet_cache is None:
            return self.post_build(pkt, pay)
        else:
            return pkt + pay

    def build_padding(self):
        # type: () -> bytes
        return self.payload.build_padding()

    def build(self):
        # type: () -> bytes
        """
        Create the current layer

        :return: string of the packet with the payload
        """
        p = self.do_build()
        p += self.build_padding()
        p = self.build_done(p)
        return p

    def post_build(self, pkt, pay):
        # type: (bytes, bytes) -> bytes
        """
        DEV: called right after the current layer is build.

        :param str pkt: the current packet (build by self_build function)
        :param str pay: the packet payload (build by do_build_payload function)
        :return: a string of the packet with the payload
        """
        return pkt + pay

    def build_done(self, p):
        # type: (bytes) -> bytes
        return self.payload.build_done(p)

    def do_build_ps(self):
        # type: () -> Tuple[bytes, List[Tuple[Packet, List[Tuple[Field[Any, Any], str, bytes]]]]]  # noqa: E501
        p = b""
        pl = []
        q = b""
        for f in self.fields_desc:
            if isinstance(f, ConditionalField) and not f._evalcond(self):
                continue
            p = f.addfield(self, p, self.getfieldval(f.name))
            if isinstance(p, bytes):
                r = p[len(q):]
                q = p
            else:
                r = b""
            pl.append((f, f.i2repr(self, self.getfieldval(f.name)), r))

        pkt, lst = self.payload.build_ps(internal=1)
        p += pkt
        lst.append((self, pl))

        return p, lst

    def build_ps(self, internal=0):
        # type: (int) -> Tuple[bytes, List[Tuple[Packet, List[Tuple[Any, Any, bytes]]]]]  # noqa: E501
        p, lst = self.do_build_ps()
#        if not internal:
#            pkt = self
#            while pkt.haslayer(conf.padding_layer):
#                pkt = pkt.getlayer(conf.padding_layer)
#                lst.append( (pkt, [ ("loakjkjd", pkt.load, pkt.load) ] ) )
#                p += pkt.load
#                pkt = pkt.payload
        return p, lst

    def canvas_dump(self, layer_shift=0, rebuild=1):
        # type: (int, int) -> pyx.canvas.canvas
        if PYX == 0:
            raise ImportError("PyX and its dependencies must be installed")
        canvas = pyx.canvas.canvas()
        if rebuild:
            _, t = self.__class__(raw(self)).build_ps()
        else:
            _, t = self.build_ps()
        YTXTI = len(t)
        for _, l in t:
            YTXTI += len(l)
        YTXT = float(YTXTI)
        YDUMP = YTXT

        XSTART = 1
        XDSTART = 10
        y = 0.0
        yd = 0.0
        XMUL = 0.55
        YMUL = 0.4

        backcolor = colgen(0.6, 0.8, 1.0, trans=pyx.color.rgb)
        forecolor = colgen(0.2, 0.5, 0.8, trans=pyx.color.rgb)
#        backcolor=makecol(0.376, 0.729, 0.525, 1.0)

        def hexstr(x):
            # type: (bytes) -> str
            return " ".join("%02x" % orb(c) for c in x)

        def make_dump_txt(x, y, txt):
            # type: (int, float, bytes) -> pyx.text.text
            return pyx.text.text(
                XDSTART + x * XMUL,
                (YDUMP - y) * YMUL,
                r"\tt{%s}" % hexstr(txt),
                [pyx.text.size.Large]
            )

        def make_box(o):
            # type: (pyx.bbox.bbox) -> pyx.bbox.bbox
            return pyx.box.rect(
                o.left(), o.bottom(), o.width(), o.height(),
                relcenter=(0.5, 0.5)
            )

        def make_frame(lst):
            # type: (List[Any]) -> pyx.path.path
            if len(lst) == 1:
                b = lst[0].bbox()
                b.enlarge(pyx.unit.u_pt)
                return b.path()
            else:
                fb = lst[0].bbox()
                fb.enlarge(pyx.unit.u_pt)
                lb = lst[-1].bbox()
                lb.enlarge(pyx.unit.u_pt)
                if len(lst) == 2 and fb.left() > lb.right():
                    return pyx.path.path(pyx.path.moveto(fb.right(), fb.top()),
                                         pyx.path.lineto(fb.left(), fb.top()),
                                         pyx.path.lineto(fb.left(), fb.bottom()),  # noqa: E501
                                         pyx.path.lineto(fb.right(), fb.bottom()),  # noqa: E501
                                         pyx.path.moveto(lb.left(), lb.top()),
                                         pyx.path.lineto(lb.right(), lb.top()),
                                         pyx.path.lineto(lb.right(), lb.bottom()),  # noqa: E501
                                         pyx.path.lineto(lb.left(), lb.bottom()))  # noqa: E501
                else:
                    # XXX
                    gb = lst[1].bbox()
                    if gb != lb:
                        gb.enlarge(pyx.unit.u_pt)
                    kb = lst[-2].bbox()
                    if kb != gb and kb != lb:
                        kb.enlarge(pyx.unit.u_pt)
                    return pyx.path.path(pyx.path.moveto(fb.left(), fb.top()),
                                         pyx.path.lineto(fb.right(), fb.top()),
                                         pyx.path.lineto(fb.right(), kb.bottom()),  # noqa: E501
                                         pyx.path.lineto(lb.right(), kb.bottom()),  # noqa: E501
                                         pyx.path.lineto(lb.right(), lb.bottom()),  # noqa: E501
                                         pyx.path.lineto(lb.left(), lb.bottom()),  # noqa: E501
                                         pyx.path.lineto(lb.left(), gb.top()),
                                         pyx.path.lineto(fb.left(), gb.top()),
                                         pyx.path.closepath(),)

        def make_dump(s,   # type: bytes
                      shift=0,  # type: int
                      y=0.,  # type: float
                      col=None,  # type: pyx.color.color
                      bkcol=None,  # type: pyx.color.color
                      large=16  # type: int
                      ):
            # type: (...) -> Tuple[pyx.canvas.canvas, pyx.bbox.bbox, int, float]  # noqa: E501
            c = pyx.canvas.canvas()
            tlist = []
            while s:
                dmp, s = s[:large - shift], s[large - shift:]
                txt = make_dump_txt(shift, y, dmp)
                tlist.append(txt)
                shift += len(dmp)
                if shift >= 16:
                    shift = 0
                    y += 1
            if col is None:
                col = pyx.color.rgb.red
            if bkcol is None:
                bkcol = pyx.color.rgb.white
            c.stroke(make_frame(tlist), [col, pyx.deco.filled([bkcol]), pyx.style.linewidth.Thick])  # noqa: E501
            for txt in tlist:
                c.insert(txt)
            return c, tlist[-1].bbox(), shift, y

        last_shift, last_y = 0, 0.0
        while t:
            bkcol = next(backcolor)
            proto, fields = t.pop()
            y += 0.5
            pt = pyx.text.text(
                XSTART,
                (YTXT - y) * YMUL,
                r"\font\cmssfont=cmss10\cmssfont{%s}" % tex_escape(
                    str(proto.name)
                ),
                [pyx.text.size.Large]
            )
            y += 1
            ptbb = pt.bbox()
            ptbb.enlarge(pyx.unit.u_pt * 2)
            canvas.stroke(ptbb.path(), [pyx.color.rgb.black, pyx.deco.filled([bkcol])])  # noqa: E501
            canvas.insert(pt)
            for field, fval, fdump in fields:
                col = next(forecolor)
                ft = pyx.text.text(XSTART, (YTXT - y) * YMUL, r"\font\cmssfont=cmss10\cmssfont{%s}" % tex_escape(field.name))  # noqa: E501
                if isinstance(field, BitField):
                    fsize = '%sb' % field.size
                else:
                    fsize = '%sB' % len(fdump)
                if (hasattr(field, 'field') and
                        'LE' in field.field.__class__.__name__[:3] or
                        'LE' in field.__class__.__name__[:3]):
                    fsize = r'$\scriptstyle\langle$' + fsize
                st = pyx.text.text(XSTART + 3.4, (YTXT - y) * YMUL, r"\font\cmbxfont=cmssbx10 scaled 600\cmbxfont{%s}" % fsize, [pyx.text.halign.boxright])  # noqa: E501
                if isinstance(fval, str):
                    if len(fval) > 18:
                        fval = fval[:18] + "[...]"
                else:
                    fval = ""
                vt = pyx.text.text(XSTART + 3.5, (YTXT - y) * YMUL, r"\font\cmssfont=cmss10\cmssfont{%s}" % tex_escape(fval))  # noqa: E501
                y += 1.0
                if fdump:
                    dt, target, last_shift, last_y = make_dump(fdump, last_shift, last_y, col, bkcol)  # noqa: E501

                    dtb = target
                    vtb = vt.bbox()
                    bxvt = make_box(vtb)
                    bxdt = make_box(dtb)
                    dtb.enlarge(pyx.unit.u_pt)
                    try:
                        if yd < 0:
                            cnx = pyx.connector.curve(bxvt, bxdt, absangle1=0, absangle2=-90)  # noqa: E501
                        else:
                            cnx = pyx.connector.curve(bxvt, bxdt, absangle1=0, absangle2=90)  # noqa: E501
                    except Exception:
                        pass
                    else:
                        canvas.stroke(cnx, [pyx.style.linewidth.thin, pyx.deco.earrow.small, col])  # noqa: E501

                    canvas.insert(dt)

                canvas.insert(ft)
                canvas.insert(st)
                canvas.insert(vt)
            last_y += layer_shift

        return canvas

    def extract_padding(self, s):
        # type: (bytes) -> Tuple[bytes, Optional[bytes]]
        """
        DEV: to be overloaded to extract current layer's padding.

        :param str s: the current layer
        :return: a couple of strings (actual layer, padding)
        """
        return s, None

    def post_dissect(self, s):
        # type: (bytes) -> bytes
        """DEV: is called right after the current layer has been dissected"""
        return s

    def pre_dissect(self, s):
        # type: (bytes) -> bytes
        """DEV: is called right before the current layer is dissected"""
        return s

    def do_dissect(self, s):
        # type: (bytes) -> bytes
        _raw = s
        self.raw_packet_cache_fields = {}
        for f in self.fields_desc:
            if not s:
                break
            s, fval = f.getfield(self, s)
            # Skip unused ConditionalField
            if isinstance(f, ConditionalField) and fval is None:
                continue
            # We need to track fields with mutable values to discard
            # .raw_packet_cache when needed.
            if f.islist or f.holds_packets or f.ismutable:
                self.raw_packet_cache_fields[f.name] = f.do_copy(fval)
            self.fields[f.name] = fval
        self.raw_packet_cache = _raw[:-len(s)] if s else _raw
        self.explicit = 1
        return s

    def do_dissect_payload(self, s):
        # type: (bytes) -> None
        """
        Perform the dissection of the layer's payload

        :param str s: the raw layer
        """
        if s:
            cls = self.guess_payload_class(s)
            try:
                p = cls(s, _internal=1, _underlayer=self)
            except KeyboardInterrupt:
                raise
            except Exception:
                if conf.debug_dissector:
                    if issubtype(cls, Packet):
                        log_runtime.error("%s dissector failed", cls.__name__)
                    else:
                        log_runtime.error("%s.guess_payload_class() returned "
                                          "[%s]",
                                          self.__class__.__name__, repr(cls))
                    if cls is not None:
                        raise
                p = conf.raw_layer(s, _internal=1, _underlayer=self)
            self.add_payload(p)

    def dissect(self, s):
        # type: (bytes) -> None
        s = self.pre_dissect(s)

        s = self.do_dissect(s)

        s = self.post_dissect(s)

        payl, pad = self.extract_padding(s)
        self.do_dissect_payload(payl)
        if pad and conf.padding:
            self.add_payload(conf.padding_layer(pad))

    def guess_payload_class(self, payload):
        # type: (bytes) -> Type[Packet]
        """
        DEV: Guesses the next payload class from layer bonds.
        Can be overloaded to use a different mechanism.

        :param str payload: the layer's payload
        :return: the payload class
        """
        for t in self.aliastypes:
            for fval, cls in t.payload_guess:
                try:
                    if all(v == self.getfieldval(k)
                           for k, v in six.iteritems(fval)):
                        return cls  # type: ignore
                except AttributeError:
                    pass
        return self.default_payload_class(payload)

    def default_payload_class(self, payload):
        # type: (bytes) -> Type[Packet]
        """
        DEV: Returns the default payload class if nothing has been found by the
        guess_payload_class() method.

        :param str payload: the layer's payload
        :return: the default payload class define inside the configuration file
        """
        return conf.raw_layer

    def hide_defaults(self):
        # type: () -> None
        """Removes fields' values that are the same as default values."""
        # use list(): self.fields is modified in the loop
        for k, v in list(six.iteritems(self.fields)):
            v = self.fields[k]
            if k in self.default_fields:
                if self.default_fields[k] == v:
                    del self.fields[k]
        self.payload.hide_defaults()

    def clone_with(self, payload=None, **kargs):
        # type: (Optional[Any], **Any) -> Any
        pkt = self.__class__()
        pkt.explicit = 1
        pkt.fields = kargs
        pkt.default_fields = self.copy_fields_dict(self.default_fields)
        pkt.overloaded_fields = self.overloaded_fields.copy()
        pkt.time = self.time
        pkt.underlayer = self.underlayer
        pkt.post_transforms = self.post_transforms
        pkt.raw_packet_cache = self.raw_packet_cache
        pkt.raw_packet_cache_fields = self.copy_fields_dict(
            self.raw_packet_cache_fields
        )
        pkt.wirelen = self.wirelen
        if payload is not None:
            pkt.add_payload(payload)
        return pkt

    def __iter__(self):
        # type: () -> Iterator[Packet]
        """Iterates through all sub-packets generated by this Packet."""
        def loop(todo, done, self=self):
            # type: (List[str], Dict[str, Any], Any) -> Iterator[Packet]
            if todo:
                eltname = todo.pop()
                elt = self.getfieldval(eltname)
                if not isinstance(elt, Gen):
                    if self.get_field(eltname).islist:
                        elt = SetGen([elt])
                    else:
                        elt = SetGen(elt)
                for e in elt:
                    done[eltname] = e
                    for x in loop(todo[:], done):
                        yield x
            else:
                if isinstance(self.payload, NoPayload):
                    payloads = SetGen([None])  # type: SetGen[Packet]
                else:
                    payloads = self.payload
                for payl in payloads:
                    # Let's make sure subpackets are consistent
                    done2 = done.copy()
                    for k in done2:
                        if isinstance(done2[k], VolatileValue):
                            done2[k] = done2[k]._fix()
                    pkt = self.clone_with(payload=payl, **done2)
                    yield pkt

        if self.explicit or self.raw_packet_cache is not None:
            todo = []
            done = self.fields
        else:
            todo = [k for (k, v) in itertools.chain(six.iteritems(self.default_fields),  # noqa: E501
                                                    six.iteritems(self.overloaded_fields))  # noqa: E501
                    if isinstance(v, VolatileValue)] + list(self.fields)
            done = {}
        return loop(todo, done)

    def iterpayloads(self):
        # type: () -> Iterator[Packet]
        """Used to iter through the payloads of a Packet.
        Useful for DNS or 802.11 for instance.
        """
        yield self
        current = self
        while current.payload:
            current = current.payload
            yield current

    def __gt__(self, other):
        # type: (Packet) -> int
        """True if other is an answer from self (self ==> other)."""
        if isinstance(other, Packet):
            return other < self
        elif isinstance(other, bytes):
            return 1
        else:
            raise TypeError((self, other))

    def __lt__(self, other):
        # type: (Packet) -> int
        """True if self is an answer from other (other ==> self)."""
        if isinstance(other, Packet):
            return self.answers(other)
        elif isinstance(other, bytes):
            return 1
        else:
            raise TypeError((self, other))

    def __eq__(self, other):
        # type: (Any) -> bool
        if not isinstance(other, self.__class__):
            return False
        for f in self.fields_desc:
            if f not in other.fields_desc:
                return False
            if self.getfieldval(f.name) != other.getfieldval(f.name):
                return False
        return self.payload == other.payload

    def __ne__(self, other):
        # type: (Any) -> bool
        return not self.__eq__(other)

    # Note: setting __hash__ to None is the standard way
    # of making an object un-hashable. mypy doesn't know that
    __hash__ = None  # type: ignore

    def hashret(self):
        # type: () -> bytes
        """DEV: returns a string that has the same value for a request
        and its answer."""
        return self.payload.hashret()

    def answers(self, other):
        # type: (Packet) -> int
        """DEV: true if self is an answer from other"""
        if other.__class__ == self.__class__:
            return self.payload.answers(other.payload)
        return 0

    def layers(self):
        # type: () -> List[Type[Packet]]
        """returns a list of layer classes (including subclasses) in this packet"""  # noqa: E501
        layers = []
        lyr = self  # type: Optional[Packet]
        while lyr:
            layers.append(lyr.__class__)
            lyr = lyr.payload.getlayer(0, _subclass=True)
        return layers

    def haslayer(self, cls, _subclass=None):
        # type: (Union[Type[Packet], str], Optional[bool]) -> int
        """
        true if self has a layer that is an instance of cls.
        Superseded by "cls in self" syntax.
        """
        if _subclass is None:
            _subclass = self.match_subclass or None
        if _subclass:
            match = issubtype
        else:
            match = lambda cls1, cls2: bool(cls1 == cls2)
        if cls is None or match(self.__class__, cls) \
           or cls in [self.__class__.__name__, self._name]:
            return True
        for f in self.packetfields:
            fvalue_gen = self.getfieldval(f.name)
            if fvalue_gen is None:
                continue
            if not f.islist:
                fvalue_gen = SetGen(fvalue_gen, _iterpacket=0)
            for fvalue in fvalue_gen:
                if isinstance(fvalue, Packet):
                    ret = fvalue.haslayer(cls, _subclass=_subclass)
                    if ret:
                        return ret
        return self.payload.haslayer(cls, _subclass=_subclass)

    def getlayer(self,
                 cls,  # type: Union[int, Type[Packet], str]
                 nb=1,  # type: int
                 _track=None,  # type: Optional[List[int]]
                 _subclass=None,  # type: Optional[bool]
                 **flt  # type: Any
                 ):
        # type: (...) -> Optional[Packet]
        """Return the nb^th layer that is an instance of cls, matching flt
values.
        """
        if _subclass is None:
            _subclass = self.match_subclass or None
        if _subclass:
            match = issubtype
        else:
            match = lambda cls1, cls2: bool(cls1 == cls2)
        # Note:
        # cls can be int, packet, str
        # string_class_name can be packet, str (packet or packet+field)
        # class_name can be packet, str (packet only)
        if isinstance(cls, int):
            nb = cls + 1
            string_class_name = ""  # type: Union[Type[Packet], str]
        else:
            string_class_name = cls
        class_name = ""  # type: Union[Type[Packet], str]
        fld = None  # type: Optional[str]
        if isinstance(string_class_name, str) and "." in string_class_name:
            class_name, fld = string_class_name.split(".", 1)
        else:
            class_name, fld = string_class_name, None
        if not class_name or match(self.__class__, class_name) \
           or class_name in [self.__class__.__name__, self._name]:
            if all(self.getfieldval(fldname) == fldvalue
                   for fldname, fldvalue in six.iteritems(flt)):
                if nb == 1:
                    if fld is None:
                        return self
                    else:
                        return self.getfieldval(fld)  # type: ignore
                else:
                    nb -= 1
        for f in self.packetfields:
            fvalue_gen = self.getfieldval(f.name)
            if fvalue_gen is None:
                continue
            if not f.islist:
                fvalue_gen = SetGen(fvalue_gen, _iterpacket=0)
            for fvalue in fvalue_gen:
                if isinstance(fvalue, Packet):
                    track = []  # type: List[int]
                    ret = fvalue.getlayer(class_name, nb=nb, _track=track,
                                          _subclass=_subclass, **flt)
                    if ret is not None:
                        return ret
                    nb = track[0]
        return self.payload.getlayer(class_name, nb=nb, _track=_track,
                                     _subclass=_subclass, **flt)

    def firstlayer(self):
        # type: () -> Packet
        q = self
        while q.underlayer is not None:
            q = q.underlayer
        return q

    def __getitem__(self, cls):
        # type: (Union[Type[Packet], str]) -> Any
        if isinstance(cls, slice):
            lname = cls.start
            if cls.stop:
                ret = self.getlayer(cls.start, nb=cls.stop, **(cls.step or {}))
            else:
                ret = self.getlayer(cls.start, **(cls.step or {}))
        else:
            lname = cls
            ret = self.getlayer(cls)
        if ret is None:
            if isinstance(lname, type):
                name = lname.__name__
            elif not isinstance(lname, bytes):
                name = repr(lname)
            else:
                name = cast(str, lname)
            raise IndexError("Layer [%s] not found" % name)
        return ret

    def __delitem__(self, cls):
        # type: (Type[Packet]) -> None
        del(self[cls].underlayer.payload)

    def __setitem__(self, cls, val):
        # type: (Type[Packet], Packet) -> None
        self[cls].underlayer.payload = val

    def __contains__(self, cls):
        # type: (Union[Type[Packet], str]) -> int
        """
        "cls in self" returns true if self has a layer which is an
        instance of cls.
        """
        return self.haslayer(cls)

    def route(self):
        # type: () -> Tuple[Optional[str], Optional[str], Optional[str]]
        return self.payload.route()

    def fragment(self, *args, **kargs):
        # type: (*Any, **Any) -> List[Packet]
        return self.payload.fragment(*args, **kargs)

    def display(self, *args, **kargs):  # Deprecated. Use show()
        # type: (*Any, **Any) -> None
        """Deprecated. Use show() method."""
        self.show(*args, **kargs)

    def _show_or_dump(self,
                      dump=False,  # type: bool
                      indent=3,  # type: int
                      lvl="",  # type: str
                      label_lvl="",  # type: str
                      first_call=True  # type: bool
                      ):
        # type: (...) -> Optional[str]
        """
        Internal method that shows or dumps a hierarchical view of a packet.
        Called by show.

        :param dump: determine if it prints or returns the string value
        :param int indent: the size of indentation for each layer
        :param str lvl: additional information about the layer lvl
        :param str label_lvl: additional information about the layer fields
        :param first_call: determine if the current function is the first
        :return: return a hierarchical view if dump, else print it
        """

        if dump:
            from scapy.themes import AnsiColorTheme
            ct = AnsiColorTheme()  # No color for dump output
        else:
            ct = conf.color_theme
        s = "%s%s %s %s \n" % (label_lvl,
                               ct.punct("###["),
                               ct.layer_name(self.name),
                               ct.punct("]###"))
        for f in self.fields_desc:
            if isinstance(f, ConditionalField) and not f._evalcond(self):
                continue
            if isinstance(f, Emph) or f in conf.emph:
                ncol = ct.emph_field_name
                vcol = ct.emph_field_value
            else:
                ncol = ct.field_name
                vcol = ct.field_value
            fvalue = self.getfieldval(f.name)
            if isinstance(fvalue, Packet) or (f.islist and f.holds_packets and isinstance(fvalue, list)):  # noqa: E501
                pad = max(0, 10 - len(f.name)) * " "
                s += "%s  \\%s%s\\\n" % (label_lvl + lvl, ncol(f.name), pad)
                fvalue_gen = SetGen(
                    fvalue,
                    _iterpacket=0
                )  # type: SetGen[Packet]
                for fvalue in fvalue_gen:
                    s += fvalue._show_or_dump(dump=dump, indent=indent, label_lvl=label_lvl + lvl + "   |", first_call=False)  # noqa: E501
            else:
                pad = max(0, 10 - len(f.name)) * " "
                begn = "%s  %s%s%s " % (label_lvl + lvl,
                                        ncol(f.name),
                                        pad,
                                        ct.punct("="),)
                reprval = f.i2repr(self, fvalue)
                if isinstance(reprval, str):
                    reprval = reprval.replace("\n", "\n" + " " * (len(label_lvl) +  # noqa: E501
                                                                  len(lvl) +
                                                                  len(f.name) +
                                                                  4))
                s += "%s%s\n" % (begn, vcol(reprval))
        if self.payload:
            s += self.payload._show_or_dump(  # type: ignore
                dump=dump,
                indent=indent,
                lvl=lvl + (" " * indent * self.show_indent),
                label_lvl=label_lvl,
                first_call=False
            )

        if first_call and not dump:
            print(s)
            return None
        else:
            return s

    def show(self, dump=False, indent=3, lvl="", label_lvl=""):
        # type: (bool, int, str, str) -> Optional[Any]
        """
        Prints or returns (when "dump" is true) a hierarchical view of the
        packet.

        :param dump: determine if it prints or returns the string value
        :param int indent: the size of indentation for each layer
        :param str lvl: additional information about the layer lvl
        :param str label_lvl: additional information about the layer fields
        :return: return a hierarchical view if dump, else print it
        """
        return self._show_or_dump(dump, indent, lvl, label_lvl)

    def show2(self, dump=False, indent=3, lvl="", label_lvl=""):
        # type: (bool, int, str, str) -> Optional[Any]
        """
        Prints or returns (when "dump" is true) a hierarchical view of an
        assembled version of the packet, so that automatic fields are
        calculated (checksums, etc.)

        :param dump: determine if it prints or returns the string value
        :param int indent: the size of indentation for each layer
        :param str lvl: additional information about the layer lvl
        :param str label_lvl: additional information about the layer fields
        :return: return a hierarchical view if dump, else print it
        """
        return self.__class__(raw(self)).show(dump, indent, lvl, label_lvl)

    def sprintf(self, fmt, relax=1):
        # type: (str, int) -> str
        """
        sprintf(format, [relax=1]) -> str

        Where format is a string that can include directives. A directive
        begins and ends by % and has the following format:
        ``%[fmt[r],][cls[:nb].]field%``

        :param fmt: is a classic printf directive, "r" can be appended for raw
          substitution:
          (ex: IP.flags=0x18 instead of SA), nb is the number of the layer
          (ex: for IP/IP packets, IP:2.src is the src of the upper IP layer).
          Special case : "%.time%" is the creation time.
          Ex::

            p.sprintf(
              "%.time% %-15s,IP.src% -> %-15s,IP.dst% %IP.chksum% "
              "%03xr,IP.proto% %r,TCP.flags%"
            )

          Moreover, the format string can include conditional statements. A
          conditional statement looks like : {layer:string} where layer is a
          layer name, and string is the string to insert in place of the
          condition if it is true, i.e. if layer is present. If layer is
          preceded by a "!", the result is inverted. Conditions can be
          imbricated. A valid statement can be::

            p.sprintf("This is a{TCP: TCP}{UDP: UDP}{ICMP:n ICMP} packet")
            p.sprintf("{IP:%IP.dst% {ICMP:%ICMP.type%}{TCP:%TCP.dport%}}")

          A side effect is that, to obtain "{" and "}" characters, you must use
          "%(" and "%)".
        """

        escape = {"%": "%",
                  "(": "{",
                  ")": "}"}

        # Evaluate conditions
        while "{" in fmt:
            i = fmt.rindex("{")
            j = fmt[i + 1:].index("}")
            cond = fmt[i + 1:i + j + 1]
            k = cond.find(":")
            if k < 0:
                raise Scapy_Exception("Bad condition in format string: [%s] (read sprintf doc!)" % cond)  # noqa: E501
            cond, format_ = cond[:k], cond[k + 1:]
            res = False
            if cond[0] == "!":
                res = True
                cond = cond[1:]
            if self.haslayer(cond):
                res = not res
            if not res:
                format_ = ""
            fmt = fmt[:i] + format_ + fmt[i + j + 2:]

        # Evaluate directives
        s = ""
        while "%" in fmt:
            i = fmt.index("%")
            s += fmt[:i]
            fmt = fmt[i + 1:]
            if fmt and fmt[0] in escape:
                s += escape[fmt[0]]
                fmt = fmt[1:]
                continue
            try:
                i = fmt.index("%")
                sfclsfld = fmt[:i]
                fclsfld = sfclsfld.split(",")
                if len(fclsfld) == 1:
                    f = "s"
                    clsfld = fclsfld[0]
                elif len(fclsfld) == 2:
                    f, clsfld = fclsfld
                else:
                    raise Scapy_Exception
                if "." in clsfld:
                    cls, fld = clsfld.split(".")
                else:
                    cls = self.__class__.__name__
                    fld = clsfld
                num = 1
                if ":" in cls:
                    cls, snum = cls.split(":")
                    num = int(snum)
                fmt = fmt[i + 1:]
            except Exception:
                raise Scapy_Exception("Bad format string [%%%s%s]" % (fmt[:25], fmt[25:] and "..."))  # noqa: E501
            else:
                if fld == "time":
                    val = time.strftime(
                        "%H:%M:%S.%%06i",
                        time.localtime(float(self.time))
                    ) % int((self.time - int(self.time)) * 1000000)
                elif cls == self.__class__.__name__ and hasattr(self, fld):
                    if num > 1:
                        val = self.payload.sprintf("%%%s,%s:%s.%s%%" % (f, cls, num - 1, fld), relax)  # noqa: E501
                        f = "s"
                    else:
                        try:
                            val = self.getfieldval(fld)
                        except AttributeError:
                            val = getattr(self, fld)
                        if f[-1] == "r":  # Raw field value
                            f = f[:-1]
                            if not f:
                                f = "s"
                        else:
                            if fld in self.fieldtype:
                                val = self.fieldtype[fld].i2repr(self, val)
                else:
                    val = self.payload.sprintf("%%%s%%" % sfclsfld, relax)
                    f = "s"
                s += ("%" + f) % val

        s += fmt
        return s

    def mysummary(self):
        # type: () -> str
        """DEV: can be overloaded to return a string that summarizes the layer.
           Only one mysummary() is used in a whole packet summary: the one of the upper layer,  # noqa: E501
           except if a mysummary() also returns (as a couple) a list of layers whose  # noqa: E501
           mysummary() must be called if they are present."""
        return ""

    def _do_summary(self):
        # type: () -> Tuple[int, str, List[Any]]
        found, s, needed = self.payload._do_summary()
        ret = ""
        if not found or self.__class__ in needed:
            ret = self.mysummary()
            if isinstance(ret, tuple):
                ret, n = ret
                needed += n
        if ret or needed:
            found = 1
        if not ret:
            ret = self.__class__.__name__ if self.show_summary else ""
        if self.__class__ in conf.emph:
            impf = []
            for f in self.fields_desc:
                if f in conf.emph:
                    impf.append("%s=%s" % (f.name, f.i2repr(self, self.getfieldval(f.name))))  # noqa: E501
            ret = "%s [%s]" % (ret, " ".join(impf))
        if ret and s:
            ret = "%s / %s" % (ret, s)
        else:
            ret = "%s%s" % (ret, s)
        return found, ret, needed

    def summary(self, intern=0):
        # type: (int) -> str
        """Prints a one line summary of a packet."""
        return self._do_summary()[1]

    def lastlayer(self, layer=None):
        # type: (Optional[Packet]) -> Packet
        """Returns the uppest layer of the packet"""
        return self.payload.lastlayer(self)

    def decode_payload_as(self, cls):
        # type: (Type[Packet]) -> None
        """Reassembles the payload and decode it using another packet class"""
        s = raw(self.payload)
        self.payload = cls(s, _internal=1, _underlayer=self)
        pp = self
        while pp.underlayer is not None:
            pp = pp.underlayer
        self.payload.dissection_done(pp)

    def command(self):
        # type: () -> str
        """
        Returns a string representing the command you have to type to
        obtain the same packet
        """
        f = []
        for fn, fv in six.iteritems(self.fields):
            fld = self.get_field(fn)
            if isinstance(fv, (list, dict, set)) and len(fv) == 0:
                continue
            if isinstance(fv, Packet):
                fv = fv.command()
            elif fld.islist and fld.holds_packets and isinstance(fv, list):
                fv = "[%s]" % ",".join(map(Packet.command, fv))
            elif isinstance(fld, FlagsField):
                fv = int(fv)
            elif callable(getattr(fv, 'command', None)):
                fv = fv.command()
            else:
                fv = repr(fv)
            f.append("%s=%s" % (fn, fv))
        c = "%s(%s)" % (self.__class__.__name__, ", ".join(f))
        pc = self.payload.command()
        if pc:
            c += "/" + pc
        return c @conf.commands.register
def bind_layers(lower,  # type: Type[Packet]
                upper,  # type: Type[Packet]
                __fval=None,  # type: Optional[Dict[str, int]]
                **fval  # type: Any
                ):
    # type: (...) -> None
    """Bind 2 layers on some specific fields' values.

    It makes the packet being built and dissected when the arguments
    are present.

    This function calls both bind_bottom_up and bind_top_down, with
    all passed arguments.

    Please have a look at their docs:
     - help(bind_bottom_up)
     - help(bind_top_down)
     """
    if __fval is not None:
        fval.update(__fval)
    bind_top_down(lower, upper, **fval)
    bind_bottom_up(lower, upper, **fval) class NoPayload(Packet):
    def __new__(cls, *args, **kargs):
        # type: (Type[Packet], *Any, **Any) -> Packet
        singl = cls.__dict__.get("__singl__")
        if singl is None:
            cls.__singl__ = singl = Packet.__new__(cls)
            Packet.__init__(singl)
        return singl

    def __init__(self, *args, **kargs):
        # type: (*Any, **Any) -> None
        pass

    def dissection_done(self, pkt):
        # type: (Packet) -> None
        pass

    def add_payload(self, payload):
        # type: (Union[Packet, bytes]) -> NoReturn
        raise Scapy_Exception("Can't add payload to NoPayload instance")

    def remove_payload(self):
        # type: () -> None
        pass

    def add_underlayer(self, underlayer):
        # type: (Any) -> None
        pass

    def remove_underlayer(self, other):
        # type: (Packet) -> None
        pass

    def copy(self):
        # type: () -> NoPayload
        return self

    def clear_cache(self):
        # type: () -> None
        pass

    def __repr__(self):
        # type: () -> str
        return ""

    def __str__(self):
        # type: () -> str
        return ""

    def __bytes__(self):
        # type: () -> bytes
        return b""

    def __nonzero__(self):
        # type: () -> bool
        return False
    __bool__ = __nonzero__

    def do_build(self):
        # type: () -> bytes
        return b""

    def build(self):
        # type: () -> bytes
        return b""

    def build_padding(self):
        # type: () -> bytes
        return b""

    def build_done(self, p):
        # type: (bytes) -> bytes
        return p

    def build_ps(self, internal=0):
        # type: (int) -> Tuple[bytes, List[Any]]
        return b"", []

    def getfieldval(self, attr):
        # type: (str) -> NoReturn
        raise AttributeError(attr)

    def getfield_and_val(self, attr):
        # type: (str) -> NoReturn
        raise AttributeError(attr)

    def setfieldval(self, attr, val):
        # type: (str, Any) -> NoReturn
        raise AttributeError(attr)

    def delfieldval(self, attr):
        # type: (str) -> NoReturn
        raise AttributeError(attr)

    def hide_defaults(self):
        # type: () -> None
        pass

    def __iter__(self):
        # type: () -> Iterator[Packet]
        return iter([])

    def __eq__(self, other):
        # type: (Any) -> bool
        if isinstance(other, NoPayload):
            return True
        return False

    def hashret(self):
        # type: () -> bytes
        return b""

    def answers(self, other):
        # type: (NoPayload) -> bool
        return isinstance(other, (NoPayload, conf.padding_layer))  # noqa: E501

    def haslayer(self, cls, _subclass=None):
        # type: (Union[Type[Packet], str], Optional[bool]) -> int
        return 0

    def getlayer(self,
                 cls,  # type: Union[int, Type[Packet], str]
                 nb=1,  # type: int
                 _track=None,  # type: Optional[List[int]]
                 _subclass=None,  # type: Optional[bool]
                 **flt  # type: Any
                 ):
        # type: (...) -> Optional[Packet]
        if _track is not None:
            _track.append(nb)
        return None

    def fragment(self, *args, **kargs):
        # type: (*Any, **Any) -> List[Packet]
        raise Scapy_Exception("cannot fragment this packet")

    def show(self, dump=False, indent=3, lvl="", label_lvl=""):
        # type: (bool, int, str, str) -> None
        pass

    def sprintf(self, fmt, relax=1):
        # type: (str, int) -> str
        if relax:
            return "??"
        else:
            raise Scapy_Exception("Format not found [%s]" % fmt)

    def _do_summary(self):
        # type: () -> Tuple[int, str, List[Any]]
        return 0, "", []

    def layers(self):
        # type: () -> List[Type[Packet]]
        return []

    def lastlayer(self, layer=None):
        # type: (Optional[Packet]) -> Packet
        return layer or self

    def command(self):
        # type: () -> str
        return ""

    def route(self):
        # type: () -> Tuple[None, None, None]
        return (None, None, None) class BitEnumField(_BitField[Union[List[int], int]], _EnumField[int]):
    __slots__ = EnumField.__slots__

    def __init__(self, name, default, size, enum, **kwargs):
        # type: (str, Optional[int], int, Dict[int, str], **Any) -> None
        _EnumField.__init__(self, name, default, enum)
        _BitField.__init__(self, name, default, size, **kwargs)

    def any2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> Union[List[int], int]
        return _EnumField.any2i(self, pkt, x)

    def i2repr(self,
               pkt,  # type: Optional[Packet]
               x,  # type: Union[List[int], int]
               ):
        # type: (...) -> Any
        return _EnumField.i2repr(self, pkt, x) class BitField(_BitField[int]):
    __doc__ = _BitField.__doc__ class ByteEnumField(EnumField[int]):
    def __init__(self, name, default, enum):
        # type: (str, Optional[int], Dict[int, str]) -> None
        EnumField.__init__(self, name, default, enum, "B") class ByteField(Field[int, int]):
    def __init__(self, name, default):
        # type: (str, Optional[int]) -> None
        Field.__init__(self, name, default, "B") class ConditionalField(_FieldContainer):
    __slots__ = ["fld", "cond"]

    def __init__(self,
                 fld,  # type: Field[Any, Any]
                 cond  # type: Callable[[Packet], bool]
                 ):
        # type: (...) -> None
        self.fld = fld
        self.cond = cond

    def _evalcond(self, pkt):
        # type: (Packet) -> bool
        return bool(self.cond(pkt))

    def any2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> Any
        # BACKWARD COMPATIBILITY
        # Note: we shouldn't need this function. (it's not correct)
        # However, having i2h implemented (#2364), it changes the default
        # behavior and broke all packets that wrongly use two ConditionalField
        # with the same name. Those packets are the problem: they are wrongly
        # built (they should either be re-using the same conditional field, or
        # using a MultipleTypeField).
        # But I don't want to dive into fixing all of them just yet,
        # so for now, let's keep this this way, even though it's not correct.
        if type(self.fld) is Field:
            return x
        return self.fld.any2i(pkt, x)

    def i2h(self, pkt, val):
        # type: (Optional[Packet], Any) -> Any
        if pkt and not self._evalcond(pkt):
            return None
        return self.fld.i2h(pkt, val)

    def getfield(self, pkt, s):
        # type: (Packet, bytes) -> Tuple[bytes, Any]
        if self._evalcond(pkt):
            return self.fld.getfield(pkt, s)
        else:
            return s, None

    def addfield(self, pkt, s, val):
        # type: (Packet, bytes, Any) -> bytes
        if self._evalcond(pkt):
            return self.fld.addfield(pkt, s, val)
        else:
            return s

    def __getattr__(self, attr):
        # type: (str) -> Any
        return getattr(self.fld, attr) class Field(Generic[I, M]):
    """
    For more information on how this works, please refer to the
    'Adding new protocols' chapter in the online documentation:

    https://scapy.readthedocs.io/en/stable/build_dissect.html
    """
    __slots__ = [
        "name",
        "fmt",
        "default",
        "sz",
        "owners",
        "struct"
    ]
    islist = 0
    ismutable = False
    holds_packets = 0

    def __init__(self, name, default, fmt="H"):
        # type: (str, Any, str) -> None
        if not isinstance(name, str):
            raise ValueError("name should be a string")
        self.name = name
        if fmt[0] in "@=<>!":
            self.fmt = fmt
        else:
            self.fmt = "!" + fmt
        self.struct = struct.Struct(self.fmt)
        self.default = self.any2i(None, default)
        self.sz = struct.calcsize(self.fmt)  # type: int
        self.owners = []  # type: List[Type[Packet]]

    def register_owner(self, cls):
        # type: (Type[Packet]) -> None
        self.owners.append(cls)

    def i2len(self,
              pkt,  # type: Packet
              x,  # type: Any
              ):
        # type: (...) -> int
        """Convert internal value to a length usable by a FieldLenField"""
        if isinstance(x, RawVal):
            return len(x)
        return self.sz

    def i2count(self, pkt, x):
        # type: (Optional[Packet], I) -> int
        """Convert internal value to a number of elements usable by a FieldLenField.
        Always 1 except for list fields"""
        return 1

    def h2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> I
        """Convert human value to internal value"""
        return cast(I, x)

    def i2h(self, pkt, x):
        # type: (Optional[Packet], I) -> Any
        """Convert internal value to human value"""
        return x

    def m2i(self, pkt, x):
        # type: (Optional[Packet], M) -> I
        """Convert machine value to internal value"""
        return cast(I, x)

    def i2m(self, pkt, x):
        # type: (Optional[Packet], Optional[I]) -> M
        """Convert internal value to machine value"""
        if x is None:
            return cast(M, 0)
        elif isinstance(x, str):
            return cast(M, bytes_encode(x))
        return cast(M, x)

    def any2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> Optional[I]
        """Try to understand the most input values possible and make an internal value from them"""  # noqa: E501
        return self.h2i(pkt, x)

    def i2repr(self, pkt, x):
        # type: (Optional[Packet], I) -> str
        """Convert internal value to a nice representation"""
        return repr(self.i2h(pkt, x))

    def addfield(self, pkt, s, val):
        # type: (Packet, bytes, Optional[I]) -> bytes
        """Add an internal value to a string

        Copy the network representation of field `val` (belonging to layer
        `pkt`) to the raw string packet `s`, and return the new string packet.
        """
        try:
            return s + self.struct.pack(self.i2m(pkt, val))
        except struct.error as ex:
            raise ValueError(
                "Incorrect type of value for field %s:\n" % self.name +
                "struct.error('%s')\n" % ex +
                "To inject bytes into the field regardless of the type, " +
                "use RawVal. See help(RawVal)"
            )

    def getfield(self, pkt, s):
        # type: (Packet, bytes) -> Tuple[bytes, I]
        """Extract an internal value from a string

        Extract from the raw packet `s` the field value belonging to layer
        `pkt`.

        Returns a two-element list,
        first the raw packet string after having removed the extracted field,
        second the extracted field itself in internal representation.
        """
        return s[self.sz:], self.m2i(pkt, self.struct.unpack(s[:self.sz])[0])

    def do_copy(self, x):
        # type: (I) -> I
        if isinstance(x, list):
            x = x[:]  # type: ignore
            for i in range(len(x)):
                if isinstance(x[i], BasePacket):
                    x[i] = x[i].copy()
            return x  # type: ignore
        if hasattr(x, "copy"):
            return x.copy()  # type: ignore
        return x

    def __repr__(self):
        # type: () -> str
        return "<%s (%s).%s>" % (
            self.__class__.__name__,
            ",".join(x.__name__ for x in self.owners),
            self.name
        )

    def copy(self):
        # type: () -> Field[I, M]
        return copy.copy(self)

    def randval(self):
        # type: () -> VolatileValue[Any]
        """Return a volatile object whose value is both random and suitable for this field"""  # noqa: E501
        fmtt = self.fmt[-1]
        if fmtt in "BbHhIiQq":
            return {"B": RandByte, "b": RandSByte,
                    "H": RandShort, "h": RandSShort,
                    "I": RandInt, "i": RandSInt,
                    "Q": RandLong, "q": RandSLong}[fmtt]()
        elif fmtt == "s":
            if self.fmt[0] in "0123456789":
                value = int(self.fmt[:-1])
            else:
                value = int(self.fmt[1:-1])
            return RandBin(value)
        else:
            raise ValueError(
                "no random class for [%s] (fmt=%s)." % (
                    self.name, self.fmt
                )
            ) class FieldLenField(Field[int, int]):
    __slots__ = ["length_of", "count_of", "adjust"]

    def __init__(
            self,
            name,  # type: str
            default,  # type: Optional[Any]
            length_of=None,  # type: Optional[str]
            fmt="H",  # type: str
            count_of=None,  # type: Optional[str]
            adjust=lambda pkt, x: x,  # type: Callable[[Packet, int], int]
    ):
        # type: (...) -> None
        Field.__init__(self, name, default, fmt)
        self.length_of = length_of
        self.count_of = count_of
        self.adjust = adjust

    def i2m(self, pkt, x):
        # type: (Optional[Packet], Optional[int]) -> int
        if x is None and pkt is not None:
            if self.length_of is not None:
                fld, fval = pkt.getfield_and_val(self.length_of)
                f = fld.i2len(pkt, fval)
            elif self.count_of is not None:
                fld, fval = pkt.getfield_and_val(self.count_of)
                f = fld.i2count(pkt, fval)
            else:
                raise ValueError(
                    "Field should have either length_of or count_of"
                )
            x = self.adjust(pkt, f)
        elif x is None:
            x = 0
        return x class FlagsField(_BitField[Optional[Union[int, FlagValue]]]):
    """ Handle Flag type field

   Make sure all your flags have a label

   Example (list):
       >>> from scapy.packet import Packet
       >>> class FlagsTest(Packet):
               fields_desc = [FlagsField("flags", 0, 8, ["f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7"])]  # noqa: E501
       >>> FlagsTest(flags=9).show2()
       ###[ FlagsTest ]###
         flags     = f0+f3

    Example (str):
       >>> from scapy.packet import Packet
       >>> class TCPTest(Packet):
               fields_desc = [
                   BitField("reserved", 0, 7),
                   FlagsField("flags", 0x2, 9, "FSRPAUECN")
               ]
       >>> TCPTest(flags=3).show2()
       ###[ FlagsTest ]###
         reserved  = 0
         flags     = FS

    Example (dict):
       >>> from scapy.packet import Packet
       >>> class FlagsTest2(Packet):
               fields_desc = [
                   FlagsField("flags", 0x2, 16, {
                       0x0001: "A",
                       0x0008: "B",
                   })
               ]

   :param name: field's name
   :param default: default value for the field
   :param size: number of bits in the field (in bits). if negative, LE
   :param names: (list or str or dict) label for each flag
       If it's a str or a list, the least Significant Bit tag's name
       is written first.
   """
    ismutable = True
    __slots__ = ["names"]

    def __init__(self,
                 name,  # type: str
                 default,  # type: Optional[Union[int, FlagValue]]
                 size,  # type: int
                 names  # type: Union[List[str], str, Dict[int, str]]
                 ):
        # type: (...) -> None
        # Convert the dict to a list
        if isinstance(names, dict):
            tmp = ["bit_%d" % i for i in range(abs(size))]
            for i, v in six.viewitems(names):
                tmp[int(math.floor(math.log(i, 2)))] = v
            names = tmp
        # Store the names as str or list
        self.names = names
        super(FlagsField, self).__init__(name, default, size)

    def _fixup_val(self, x):
        # type: (Any) -> Optional[FlagValue]
        """Returns a FlagValue instance when needed. Internal method, to be
used in *2i() and i2*() methods.

        """
        if isinstance(x, (FlagValue, VolatileValue)):
            return x  # type: ignore
        if x is None:
            return None
        return FlagValue(x, self.names)

    def any2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> Optional[FlagValue]
        return self._fixup_val(super(FlagsField, self).any2i(pkt, x))

    def m2i(self, pkt, x):
        # type: (Optional[Packet], int) -> Optional[FlagValue]
        return self._fixup_val(super(FlagsField, self).m2i(pkt, x))

    def i2h(self, pkt, x):
        # type: (Optional[Packet], Any) -> Optional[FlagValue]
        return self._fixup_val(super(FlagsField, self).i2h(pkt, x))

    def i2repr(self,
               pkt,  # type: Optional[Packet]
               x,  # type: Any
               ):
        # type: (...) -> str
        if isinstance(x, (list, tuple)):
            return repr(type(x)(
                "None" if v is None else str(self._fixup_val(v)) for v in x
            ))
        return "None" if x is None else str(self._fixup_val(x)) class IntField(Field[int, int]):
    def __init__(self, name, default):
        # type: (str, Optional[int]) -> None
        Field.__init__(self, name, default, "I") class PacketListField(_PacketField[List[BasePacket]]):
    """PacketListField represents a list containing a series of Packet instances
    that might occur right in the middle of another Packet field.
    This field type may also be used to indicate that a series of Packet
    instances have a sibling semantic instead of a parent/child relationship
    (i.e. a stack of layers).
    """
    __slots__ = ["count_from", "length_from", "next_cls_cb"]
    islist = 1

    def __init__(
            self,
            name,  # type: str
            default,  # type: Optional[List[BasePacket]]
            pkt_cls=None,  # type: Optional[Union[Callable[[bytes], Packet], Type[Packet]]]  # noqa: E501
            count_from=None,  # type: Optional[Callable[[Packet], int]]
            length_from=None,  # type: Optional[Callable[[Packet], int]]
            next_cls_cb=None,  # type: Optional[Callable[[Packet, List[BasePacket], Optional[Packet], bytes], Type[Packet]]]  # noqa: E501
    ):
        # type: (...) -> None
        """
        The number of Packet instances that are dissected by this field can
        be parametrized using one of three different mechanisms/parameters:

            * count_from: a callback that returns the number of Packet
              instances to dissect. The callback prototype is::

                count_from(pkt:Packet) -> int

            * length_from: a callback that returns the number of bytes that
              must be dissected by this field. The callback prototype is::

                length_from(pkt:Packet) -> int

            * next_cls_cb: a callback that enables a Scapy developer to
              dynamically discover if another Packet instance should be
              dissected or not. See below for this callback prototype.

        The bytes that are not consumed during the dissection of this field
        are passed to the next field of the current packet.

        For the serialization of such a field, the list of Packets that are
        contained in a PacketListField can be heterogeneous and is
        unrestricted.

        The type of the Packet instances that are dissected with this field is
        specified or discovered using one of the following mechanism:

            * the pkt_cls parameter may contain a callable that returns an
              instance of the dissected Packet. This may either be a
              reference of a Packet subclass (e.g. DNSRROPT in layers/dns.py)
              to generate an homogeneous PacketListField or a function
              deciding the type of the Packet instance
              (e.g. _CDPGuessAddrRecord in contrib/cdp.py)

            * the pkt_cls parameter may contain a class object with a defined
              ``dispatch_hook`` classmethod. That method must return a Packet
              instance. The ``dispatch_hook`` callmethod must implement the
                following prototype::

                dispatch_hook(cls,
                              _pkt:Optional[Packet],
                              *args, **kargs
                ) -> Type[Packet]

                The _pkt parameter may contain a reference to the packet
                instance containing the PacketListField that is being
                dissected.

            * the ``next_cls_cb`` parameter may contain a callable whose
              prototype is::

                cbk(pkt:Packet,
                    lst:List[Packet],
                    cur:Optional[Packet],
                    remain:str
                ) -> Optional[Type[Packet]]

              The pkt argument contains a reference to the Packet instance
              containing the PacketListField that is being dissected.
              The lst argument is the list of all Packet instances that were
              previously parsed during the current ``PacketListField``
              dissection, saved for the very last Packet instance.
              The cur argument contains a reference to that very last parsed
              ``Packet`` instance. The remain argument contains the bytes
              that may still be consumed by the current PacketListField
              dissection operation.

              This callback returns either the type of the next Packet to
              dissect or None to indicate that no more Packet are to be
              dissected.

              These four arguments allows a variety of dynamic discovery of
              the number of Packet to dissect and of the type of each one of
              these Packets, including: type determination based on current
              Packet instances or its underlayers, continuation based on the
              previously parsed Packet instances within that PacketListField,
              continuation based on a look-ahead on the bytes to be
              dissected...

        The pkt_cls and next_cls_cb parameters are semantically exclusive,
        although one could specify both. If both are specified, pkt_cls is
        silently ignored. The same is true for count_from and next_cls_cb.

        length_from and next_cls_cb are compatible and the dissection will
        end, whichever of the two stop conditions comes first.

        :param name: the name of the field
        :param default: the default value of this field; generally an empty
            Python list
        :param pkt_cls: either a callable returning a Packet instance or a
            class object defining a ``dispatch_hook`` class method
        :param count_from: a callback returning the number of Packet
            instances to dissect.
        :param length_from: a callback returning the number of bytes to dissect
        :param next_cls_cb: a callback returning either None or the type of
            the next Packet to dissect.
        """
        if default is None:
            default = []  # Create a new list for each instance
        super(PacketListField, self).__init__(
            name,
            default,
            pkt_cls  # type: ignore
        )
        self.count_from = count_from
        self.length_from = length_from
        self.next_cls_cb = next_cls_cb

    def any2i(self, pkt, x):
        # type: (Optional[Packet], Any) -> List[BasePacket]
        if not isinstance(x, list):
            return [x]
        else:
            return x

    def i2count(self,
                pkt,  # type: Optional[Packet]
                val,  # type: List[BasePacket]
                ):
        # type: (...) -> int
        if isinstance(val, list):
            return len(val)
        return 1

    def i2len(self,
              pkt,  # type: Optional[Packet]
              val,  # type: List[Packet]
              ):
        # type: (...) -> int
        return sum(len(p) for p in val)

    def getfield(self, pkt, s):
        # type: (Packet, bytes) -> Tuple[bytes, List[BasePacket]]
        c = len_pkt = cls = None
        if self.length_from is not None:
            len_pkt = self.length_from(pkt)
        elif self.count_from is not None:
            c = self.count_from(pkt)
        if self.next_cls_cb is not None:
            cls = self.next_cls_cb(pkt, [], None, s)
            c = 1
            if cls is None:
                c = 0

        lst = []  # type: List[BasePacket]
        ret = b""
        remain = s
        if len_pkt is not None:
            remain, ret = s[:len_pkt], s[len_pkt:]
        while remain:
            if c is not None:
                if c <= 0:
                    break
                c -= 1
            try:
                if cls is not None:
                    p = cls(remain)
                else:
                    p = self.m2i(pkt, remain)
            except Exception:
                if conf.debug_dissector:
                    raise
                p = conf.raw_layer(load=remain)
                remain = b""
            else:
                if conf.padding_layer in p:
                    pad = p[conf.padding_layer]
                    remain = pad.load
                    del(pad.underlayer.payload)
                    if self.next_cls_cb is not None:
                        cls = self.next_cls_cb(pkt, lst, p, remain)
                        if cls is not None:
                            c = 0 if c is None else c
                            c += 1
                else:
                    remain = b""
            lst.append(p)
        return remain + ret, lst

    def addfield(self, pkt, s, val):
        # type: (Packet, bytes, Any) -> bytes
        return s + b"".join(bytes_encode(v) for v in val) class ShortEnumField(EnumField[int]):
    __slots__ = EnumField.__slots__

    def __init__(self,
                 name,  # type: str
                 default,  # type: int
                 enum,  # type: Union[Dict[int, str], Dict[str, int], Tuple[Callable[[int], str], Callable[[str], int]], DADict[int, str]]  # noqa: E501
                 ):
        # type: (...) -> None
        EnumField.__init__(self, name, default, enum, "H") class ShortField(Field[int, int]):
    def __init__(self, name, default):
        # type: (str, Optional[int]) -> None
        Field.__init__(self, name, default, "H") class StrField(_StrField[bytes]):
    pass class StrLenField(StrField):
    __slots__ = ["length_from", "max_length"]

    def __init__(
            self,
            name,  # type: str
            default,  # type: bytes
            length_from=None,  # type: Optional[Callable[[Packet], int]]
            max_length=None,  # type: Optional[Any]
    ):
        # type: (...) -> None
        super(StrLenField, self).__init__(name, default)
        self.length_from = length_from
        self.max_length = max_length

    def getfield(self, pkt, s):
        # type: (Any, bytes) -> Tuple[bytes, bytes]
        len_pkt = (self.length_from or (lambda x: 0))(pkt)
        return s[len_pkt:], self.m2i(pkt, s[:len_pkt])

    def randval(self):
        # type: () -> RandBin
        return RandBin(RandNum(0, self.max_length or 1200)) class MultipleTypeField(_FieldContainer):
    """MultipleTypeField are used for fields that can be implemented by
various Field subclasses, depending on conditions on the packet.

It is initialized with `flds` and `dflt`.

`dflt` is the default field type, to be used when none of the
conditions matched the current packet.

`flds` is a list of tuples (`fld`, `cond`), where `fld` if a field
type, and `cond` a "condition" to determine if `fld` is the field type
that should be used.

`cond` is either:

  - a callable `cond_pkt` that accepts one argument (the packet) and
    returns True if `fld` should be used, False otherwise.

  - a tuple (`cond_pkt`, `cond_pkt_val`), where `cond_pkt` is the same
    as in the previous case and `cond_pkt_val` is a callable that
    accepts two arguments (the packet, and the value to be set) and
    returns True if `fld` should be used, False otherwise.

See scapy.layers.l2.ARP (type "help(ARP)" in Scapy) for an example of
use.

    """

    __slots__ = ["flds", "dflt", "name", "default"]

    def __init__(self,
                 flds,  # type: List[Tuple[Field[Any, Any], Any]]
                 dflt  # type: Field[Any, Any]
                 ):
        # type: (...) -> None
        self.flds = flds
        self.dflt = dflt
        self.default = None  # So that we can detect changes in defaults
        self.name = self.dflt.name
        if any(x[0].name != self.name for x in self.flds):
            warnings.warn(
                "All fields should have the same name in a MultipleTypeField",
                SyntaxWarning
            )

    def _iterate_fields_cond(self, pkt, val, use_val):
        # type: (Optional[Packet], Any, bool) -> Field[Any, Any]
        """Internal function used by _find_fld_pkt & _find_fld_pkt_val"""
        # Iterate through the fields
        for fld, cond in self.flds:
            if isinstance(cond, tuple):
                if use_val:
                    if val is None:
                        val = self.dflt.default
                    if cond[1](pkt, val):
                        return fld
                    continue
                else:
                    cond = cond[0]
            if cond(pkt):
                return fld
        return self.dflt

    def _find_fld_pkt(self, pkt):
        # type: (Optional[Packet]) -> Field[Any, Any]
        """Given a Packet instance `pkt`, returns the Field subclass to be
used. If you know the value to be set (e.g., in .addfield()), use
._find_fld_pkt_val() instead.

        """
        return self._iterate_fields_cond(pkt, None, False)

    def _find_fld_pkt_val(self,
                          pkt,  # type: Optional[Packet]
                          val,  # type: Any
                          ):
        # type: (...) -> Tuple[Field[Any, Any], Any]
        """Given a Packet instance `pkt` and the value `val` to be set,
returns the Field subclass to be used, and the updated `val` if necessary.

        """
        fld = self._iterate_fields_cond(pkt, val, True)
        if val is None:
            val = fld.default
        return fld, val

    def _find_fld(self):
        # type: () -> Field[Any, Any]
        """Returns the Field subclass to be used, depending on the Packet
instance, or the default subclass.

DEV: since the Packet instance is not provided, we have to use a hack
to guess it. It should only be used if you cannot provide the current
Packet instance (for example, because of the current Scapy API).

If you have the current Packet instance, use ._find_fld_pkt_val() (if
the value to set is also known) of ._find_fld_pkt() instead.

        """
        # Hack to preserve current Scapy API
        # See https://stackoverflow.com/a/7272464/3223422
        frame = inspect.currentframe().f_back.f_back  # type: ignore
        while frame is not None:
            try:
                pkt = frame.f_locals['self']
            except KeyError:
                pass
            else:
                if isinstance(pkt, tuple(self.dflt.owners)):
                    if not pkt.default_fields:
                        # Packet not initialized
                        return self.dflt
                    return self._find_fld_pkt(pkt)
            frame = frame.f_back
        return self.dflt

    def getfield(self,
                 pkt,  # type: Packet
                 s,  # type: bytes
                 ):
        # type: (...) -> Tuple[bytes, Any]
        return self._find_fld_pkt(pkt).getfield(pkt, s)

    def addfield(self, pkt, s, val):
        # type: (Packet, bytes, Any) -> bytes
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.addfield(pkt, s, val)

    def any2i(self, pkt, val):
        # type: (Optional[Packet], Any) -> Any
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.any2i(pkt, val)

    def h2i(self, pkt, val):
        # type: (Optional[Packet], Any) -> Any
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.h2i(pkt, val)

    def i2h(self,
            pkt,  # type: Packet
            val,  # type: Any
            ):
        # type: (...) -> Any
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.i2h(pkt, val)

    def i2m(self, pkt, val):
        # type: (Optional[Packet], Optional[Any]) -> Any
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.i2m(pkt, val)

    def i2len(self, pkt, val):
        # type: (Packet, Any) -> int
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.i2len(pkt, val)

    def i2repr(self, pkt, val):
        # type: (Optional[Packet], Any) -> str
        fld, val = self._find_fld_pkt_val(pkt, val)
        return fld.i2repr(pkt, val)

    def register_owner(self, cls):
        # type: (Type[Packet]) -> None
        for fld, _ in self.flds:
            fld.owners.append(cls)
        self.dflt.owners.append(cls)

    @property
    def fld(self):
        # type: () -> Field[Any, Any]
        return self._find_fld() class UTCTimeField(Field[float, int]):
    __slots__ = ["epoch", "delta", "strf",
                 "use_msec", "use_micro", "use_nano", "custom_scaling"]

    # Do not change the order of the keywords in here
    # Netflow heavily rely on this
    def __init__(self,
                 name,  # type: str
                 default,  # type: int
                 use_msec=False,  # type: bool
                 use_micro=False,  # type: bool
                 use_nano=False,  # type: bool
                 epoch=None,  # type: Optional[Tuple[int, int, int, int, int, int, int, int, int]]  # noqa: E501
                 strf="%a, %d %b %Y %H:%M:%S %z",  # type: str
                 custom_scaling=None,  # type: Optional[int]
                 fmt="I"  # type: str
                 ):
        # type: (...) -> None
        Field.__init__(self, name, default, fmt=fmt)
        mk_epoch = EPOCH if epoch is None else calendar.timegm(epoch)
        self.epoch = mk_epoch
        self.delta = mk_epoch - EPOCH
        self.strf = strf
        self.use_msec = use_msec
        self.use_micro = use_micro
        self.use_nano = use_nano
        self.custom_scaling = custom_scaling

    def i2repr(self, pkt, x):
        # type: (Optional[Packet], float) -> str
        if x is None:
            x = time.time() - self.delta
        elif self.use_msec:
            x = x / 1e3
        elif self.use_micro:
            x = x / 1e6
        elif self.use_nano:
            x = x / 1e9
        elif self.custom_scaling:
            x = x / self.custom_scaling
        x = int(x) + self.delta
        t = time.strftime(self.strf, time.gmtime(x))
        return "%s (%d)" % (t, x)

    def i2m(self, pkt, x):
        # type: (Optional[Packet], Optional[float]) -> int
        if x is None:
            x = time.time()
            if self.use_msec:
                x = x * 1e3
            elif self.use_micro:
                x = x * 1e6
            elif self.use_nano:
                x = x * 1e9
            elif self.custom_scaling:
                x = x * self.custom_scaling
            return int(x) - self.delta
        return int(x) def orb(x):
    # type: (Union[int, str, bytes]) -> int
    """Return ord(x) when not already an int."""
    if isinstance(x, int):
        return x
    return ord(x) def raw(x):
    # type: (Union[Packet]) -> bytes
    """
    Builds a packet and returns its bytes representation.
    This function is and will always be cross-version compatible
    """
    if hasattr(x, "__bytes__"):
        return x.__bytes__()
    return bytes(x) def chb(x):
    # type: (int) -> bytes
    if isinstance(x, str):
        return x
    return chr(x) def bytes_encode(x):
    # type: (Any) -> bytes
    """Ensure that the given object is bytes.
    If the parameter is a packet, raw() should be preferred.
    """
    if isinstance(x, str):
        return x.encode()
    return bytes(x) class AnsweringMachine(Generic[_T]):
    function_name = ""
    filter = None  # type: Optional[str]
    sniff_options = {"store": 0}  # type: Dict[str, Any]
    sniff_options_list = ["store", "iface", "count", "promisc", "filter",
                          "type", "prn", "stop_filter", "opened_socket"]
    send_options = {"verbose": 0}  # type: Dict[str, Any]
    send_options_list = ["iface", "inter", "loop", "verbose", "socket"]
    send_function = staticmethod(send)

    def __init__(self, **kargs):
        # type: (Any) -> None
        self.mode = 0
        self.verbose = kargs.get("verbose", conf.verb >= 0)
        if self.filter:
            kargs.setdefault("filter", self.filter)
        kargs.setdefault("prn", self.reply)
        self.optam1 = {}  # type: Dict[str, Any]
        self.optam2 = {}  # type: Dict[str, Any]
        self.optam0 = {}  # type: Dict[str, Any]
        doptsend, doptsniff = self.parse_all_options(1, kargs)
        self.defoptsend = self.send_options.copy()
        self.defoptsend.update(doptsend)
        self.defoptsniff = self.sniff_options.copy()
        self.defoptsniff.update(doptsniff)
        self.optsend = {}   # type: Dict[str, Any]
        self.optsniff = {}   # type: Dict[str, Any]

    def __getattr__(self, attr):
        # type: (str) -> Any
        for dct in [self.optam2, self.optam1]:
            if attr in dct:
                return dct[attr]
        raise AttributeError(attr)

    def __setattr__(self, attr, val):
        # type: (str, Any) -> None
        mode = self.__dict__.get("mode", 0)
        if mode == 0:
            self.__dict__[attr] = val
        else:
            [self.optam1, self.optam2][mode - 1][attr] = val

    def parse_options(self):
        # type: () -> None
        pass

    def parse_all_options(self, mode, kargs):
        # type: (int, Any) -> Tuple[Dict[str, Any], Dict[str, Any]]
        sniffopt = {}  # type: Dict[str, Any]
        sendopt = {}  # type: Dict[str, Any]
        for k in list(kargs):  # use list(): kargs is modified in the loop
            if k in self.sniff_options_list:
                sniffopt[k] = kargs[k]
            if k in self.send_options_list:
                sendopt[k] = kargs[k]
            if k in self.sniff_options_list + self.send_options_list:
                del kargs[k]
        if mode != 2 or kargs:
            if mode == 1:
                self.optam0 = kargs
            elif mode == 2 and kargs:
                k = self.optam0.copy()
                k.update(kargs)
                self.parse_options(**k)
                kargs = k
            omode = self.__dict__.get("mode", 0)
            self.__dict__["mode"] = mode
            self.parse_options(**kargs)
            self.__dict__["mode"] = omode
        return sendopt, sniffopt

    def is_request(self, req):
        # type: (Packet) -> int
        return 1

    def make_reply(self, req):
        # type: (Packet) -> _T
        return req

    def send_reply(self, reply, send_function=None):
        # type: (_T, Optional[Callable[..., None]]) -> None
        if send_function:
            send_function(reply)
        else:
            self.send_function(reply, **self.optsend)

    def print_reply(self, req, reply):
        # type: (Packet, _T) -> None
        if isinstance(reply, PacketList):
            print("%s ==> %s" % (req.summary(),
                                 [res.summary() for res in reply]))
        else:
            print("%s ==> %s" % (req.summary(), reply.summary()))

    def reply(self, pkt, send_function=None, address=None):
        # type: (Packet, Optional[Callable[..., None]], Optional[Any]) -> None
        if not self.is_request(pkt):
            return
        if address:
            # Only on AnsweringMachineTCP
            reply = self.make_reply(pkt, address=address)  # type: ignore
        else:
            reply = self.make_reply(pkt)
        if not reply:
            return
        if send_function:
            self.send_reply(reply, send_function=send_function)
        else:
            # Retro-compability. Remove this if eventually
            self.send_reply(reply)
        if self.verbose:
            self.print_reply(pkt, reply)

    def run(self, *args, **kargs):
        # type: (Any, Any) -> None
        warnings.warn(
            "run() method deprecated. The instance is now callable",
            DeprecationWarning
        )
        self(*args, **kargs)

    def __call__(self, *args, **kargs):
        # type: (Any, Any) -> None
        optsend, optsniff = self.parse_all_options(2, kargs)
        self.optsend = self.defoptsend.copy()
        self.optsend.update(optsend)
        self.optsniff = self.defoptsniff.copy()
        self.optsniff.update(optsniff)

        try:
            self.sniff()
        except KeyboardInterrupt:
            print("Interrupted by user")

    def sniff(self):
        # type: () -> None
        sniff(**self.optsniff) @conf.commands.register
def sr1(x,  # type: _PacketIterable
        promisc=None,  # type: Optional[bool]
        filter=None,  # type: Optional[str]
        iface=None,  # type: Optional[_GlobInterfaceType]
        nofilter=0,  # type: int
        *args,  # type: Any
        **kargs  # type: Any
        ):
    # type: (...) -> Optional[Packet]
    """
    Send packets at layer 3 and return only the first answer
    """
    iface = _interface_selection(iface, x)
    s = conf.L3socket(promisc=promisc, filter=filter,
                      nofilter=nofilter, iface=iface)
    ans, _ = sndrcv(s, x, *args, **kargs)
    s.close()
    if len(ans) > 0:
        return cast(Packet, ans[0][1])
    return None class IPTools(object):
class _IPOption_HDR(Packet):
class IPOption(Packet):
class IPOption_EOL(IPOption):
class IPOption_NOP(IPOption):
class IPOption_Security(IPOption):
class IPOption_RR(IPOption):
class IPOption_LSRR(IPOption_RR):
class IPOption_SSRR(IPOption_RR):
class IPOption_Stream_Id(IPOption):
class IPOption_MTU_Probe(IPOption):
class IPOption_MTU_Reply(IPOption_MTU_Probe):
class IPOption_Traceroute(IPOption):
class IPOption_Timestamp(IPOption):
class IPOption_Address_Extension(IPOption):
class IPOption_Router_Alert(IPOption):
class IPOption_SDBM(IPOption):
class RandTCPOptions(VolatileValue):
class TCPOptionsField(StrField):
class ICMPTimeStampField(IntField):
class DestIPField(IPField, DestField):
class IP(Packet, IPTools):
class TCP(Packet):
class UDP(Packet):
class ICMP(Packet):
class IPerror(IP):
class TCPerror(TCP):
class UDPerror(UDP):
class ICMPerror(ICMP):
class TracerouteResult(SndRcvList):
        class IPsphere(vpython.sphere):
class TCP_client(Automaton):
class ICMPEcho_am(AnsweringMachine):
    def whois(self):
    def _ttl(self):
    def ottl(self):
    def hops(self):
    def extract_padding(self, p):
    def register_variant(cls):
    def dispatch_hook(cls, pkt=None, *args, **kargs):
    def get_current_router(self):
    def post_build(self, p, pay):
    def __init__(self, size=None):
    def _fix(self):
    def __bytes__(self):
    def getfield(self, pkt, s):
    def m2i(self, pkt, x):
    def i2h(self, pkt, x):
    def i2m(self, pkt, x):
    def randval(self):
    def i2repr(self, pkt, val):
    def any2i(self, pkt, val):
    def __init__(self, name, default):
    def i2m(self, pkt, x):
    def i2h(self, pkt, x):
    def post_build(self, p, pay):
    def extract_padding(self, s):
    def route(self):
    def hashret(self):
    def answers(self, other):
    def mysummary(self):
    def fragment(self, fragsize=1480):
def in4_chksum(proto, u, p):
    def post_build(self, p, pay):
    def hashret(self):
    def answers(self, other):
    def mysummary(self):
    def post_build(self, p, pay):
    def extract_padding(self, s):
    def hashret(self):
    def answers(self, other):
    def mysummary(self):
    def post_build(self, p, pay):
    def hashret(self):
    def answers(self, other):
    def guess_payload_class(self, payload):
    def mysummary(self):
    def answers(self, other):
    def mysummary(self):
    def answers(self, other):
    def mysummary(self):
    def answers(self, other):
    def mysummary(self):
    def answers(self, other):
    def mysummary(self):
def inet_register_l3(l2, l3):
def fragment(pkt, fragsize=1480):
def overlap_frag(p, overlap, fragsize=8, overlap_fragsize=None):
def _defrag_list(lst, defrag, missfrag):
def _defrag_logic(plist, complete=False):
def defrag(plist):
def defragment(plist):
def _packetlist_timeskew_graph(self, ip, **kargs):
    def _wrap_data(ts_tuple, wrap_seconds=2000):
    def __init__(self, res=None, name="Traceroute", stats=None):
    def show(self):
    def get_trace(self):
    def trace3D(self, join=True):
    def trace3D_notebook(self):
            def __init__(self, ip, **kargs):
            def fullinfos(self):
            def unfull(self):
            def setlabel(self, txt, visible=None):
            def check_double_click(self):
            def action(self):
        def mouse_click(ev):
    def world_trace(self):
    def make_graph(self, ASres=None, padding=0):
    def graph(self, ASres=conf.AS_resolver, padding=0, **kargs):
def traceroute(target, dport=80, minttl=1, maxttl=30, sport=RandShort(), l4=None, filter=None, timeout=2, verbose=None, **kargs):  # noqa: E501
def traceroute_map(ips, **kargs):
    def parse_args(self, ip, port, *args, **kargs):
    def _transmit_packet(self, pkt):
    def master_filter(self, pkt):
    def START(self):
    def SYN_SENT(self):
    def ESTABLISHED(self):
    def LAST_ACK(self):
    def CLOSED(self):
    def STOP(self):
    def STOP_SENT_FIN_ACK(self):
    def connect(self):
    def send_syn(self):
    def synack_received(self, pkt):
    def send_ack_of_synack(self, pkt):
    def incoming_data_received(self, pkt):
    def receive_data(self, pkt):
    def outgoing_data_received(self, fd):
    def send_data(self, d):
    def reset_received(self, pkt):
    def fin_received(self, pkt):
    def send_finack(self, pkt):
    def ack_of_fin_received(self, pkt):
    def stop_requested(self):
    def stop_send_finack(self):
    def stop_fin_received(self, pkt):
    def stop_send_ack(self, pkt):
    def syn_ack_timeout(self):
    def stop_ack_timeout(self):
def report_ports(target, ports):
def IPID_count(lst, funcID=lambda x: x[1].id, funcpres=lambda x: x[1].summary()):  # noqa: E501
def fragleak(target, sport=123, dport=123, timeout=0.2, onlyasc=0, count=None):
def fragleak2(target, timeout=0.4, onlyasc=0, count=None):
    def is_request(self, req):
    def print_reply(self, req, reply):
    def make_reply(self, req):
        X = ct % wrap_seconds
        Y = ((ct - first_creation_time) - ((rt - first_replied_timestamp) / 1000.0))  # noqa: E501 def neighsol(addr, src, iface, timeout=1, chainCC=0):
def getmacbyip6(ip6, chainCC=0):
    def __init__(self, name, default, count_from=None, length_from=None):
    def i2len(self, pkt, i):
    def i2count(self, pkt, i):
    def getfield(self, pkt, s):
    def i2m(self, pkt, x):
    def i2repr(self, pkt, x):
    def default_payload_class(self, p):
    def route(self):
    def mysummary(self):
    def post_build(self, p, pay):
    def extract_padding(self, data):
    def hashret(self):
    def answers(self, other):
    def dispatch_hook(cls, _pkt=None, *_, **kargs):
def inet6_register_l3(l2, l3):
    def answers(self, other):
    def mysummary(self):
def in6_chksum(nh, u, p):
    def i2repr(self, pkt, x):
    def alignment_delta(self, curpos):  # By default, no alignment requirement
    def dispatch_hook(cls, _pkt=None, *args, **kargs):
    def extract_padding(self, p):
    def alignment_delta(self, curpos):  # No alignment requirement
    def extract_padding(self, p):
    def alignment_delta(self, curpos):  # No alignment requirement
    def extract_padding(self, p):
    def alignment_delta(self, curpos):  # alignment requirement : 2n+0
    def extract_padding(self, p):
    def alignment_delta(self, curpos):  # alignment requirement : 4n+2
    def extract_padding(self, p):
    def alignment_delta(self, curpos):  # alignment requirement : 8n+6
    def extract_padding(self, p):
    def __init__(self, name, default, cls, curpos, *args, **kargs):
    def i2len(self, pkt, i):
    def i2m(self, pkt, x):
    def addfield(self, pkt, s, val):
    def addfield(self, pkt, s, val):
    def getfield(self, pkt, s):
    def i2repr(self, pkt, x):
    def post_build(self, pkt, pay):
    def extract_padding(self, p):
    def register_variant(cls):
    def dispatch_hook(cls, pkt=None, *args, **kargs):
    def post_build(self, pkt, pay):
    def guess_payload_class(self, p):
def defragment6(packets):
def fragment6(pkt, fragSize):
    def post_build(self, p, pay):
    def hashret(self):
    def answers(self, other):
    def guess_payload_class(self, p):
    def mysummary(self):
    def hashret(self):
    def answers(self, other):
    def answers(self, query):
    def post_build(self, packet, payload):
    def default_payload_class(self, packet):
    def post_build(self, packet, payload):
    def answers(self, query):
    def extract_padding(self, s):
    def extract_padding(self, s):
    def extract_padding(self, s):
    def guess_payload_class(self, p):
    def mysummary(self):
    def mysummary(self):
    def __init__(self, name, default, cls, cur_shift, length_from=None, shift=0):  # noqa: E501
    def getfield(self, pkt, s):
    def m2i(self, pkt, m):
    def i2m(self, pkt, x):
    def i2len(self, pkt, i):
    def mysummary(self):
    def mysummary(self):
    def mysummary(self):
    def __init__(self, name, default):
    def addfield(self, pkt, s, val):
    def getfield(self, pkt, s):
    def i2len(self, pkt, x):
    def i2m(self, pkt, x):
    def mysummary(self):
    def mysummary(self):
    def __init__(self, name, default, length_from=None, padded=False):  # noqa: E501
    def i2len(self, pkt, x):
    def m2i(self, pkt, x):
    def i2m(self, pkt, x):
        def conditionalTrailingDot(z):
    def mysummary(self):
    def answers(self, other):
    def mysummary(self):
    def mysummary(self):
    def hashret(self):
    def mysummary(self):
    def hashret(self):
    def answers(self, other):
    def hashret(self):
    def answers(self, other):
    def __init__(self, name, default=None):
def computeNIGroupAddr(name):
def names2dnsrepr(x):
def dnsrepr2names(x):
    def __init__(self, name, default):
    def i2h(self, pkt, x):
    def h2i(self, pkt, x):
    def i2repr(self, pkt, x):
    def getfield(self, pkt, s):
    def addfield(self, pkt, s, val):
    def i2m(self, pkt, x):
    def i2h(self, pkt, x):
    def h2i(self, pkt, x):
            def fixvalue(x):
    def addfield(self, pkt, s, val):
    def getfield(self, pkt, s):
    def i2repr(self, pkt, x):
def _niquery_guesser(p):
    def hashret(self):
    def hashret(self):
    def answers(self, other):
    def _hashret(self):
    def hashret(self):
    def answers(self, other):
    def alignment_delta(self, curpos):
    def extract_padding(self, p):
    def i2repr(self, pkt, x):
    def dispatch_hook(cls, _pkt=None, *_, **kargs):
    def post_build(self, p, pay):
    def hashret(self):
    def hashret(self):
    def hashret(self):
    def hashret(self):
    def answers(self, other):
    def hashret(self):
    def answers(self, other):
    def i2repr(self, pkt, x):
    def hashret(self):  # Hack: see comment in MIP6MH_BRR.hashret()
    def answers(self, other):
    def hashret(self):  # Hack: see comment in MIP6MH_BRR.hashret()
    def answers(self, other):
    def _resolve_one(self, ip):
    def show(self):
    def get_trace(self):
    def graph(self, ASres=AS_resolver6(), **kargs):
def traceroute6(target, dport=80, minttl=1, maxttl=30, sport=RandShort(),
                l4=None, timeout=2, verbose=None, **kargs):
    def __init__(self, type=ETH_P_IPV6, filter=None, iface=None, promisc=None, nofilter=0):  # noqa: E501
def IPv6inIP(dst='203.178.135.36', src=None):
    def __init__(self, family=socket.AF_INET6, type=socket.SOCK_STREAM, proto=0, **args):  # noqa: E501
    def set(self, dst, src=None):
    def nonblock_recv(self):
    def recv(self, x):
    def _recv(self, p, x=MTU):
    def send(self, x):
def _NDP_Attack_DAD_DoS(reply_callback, iface=None, mac_src_filter=None,
                        tgt_filter=None, reply_mac=None):
    def is_request(req, mac_src_filter, tgt_filter):
def NDP_Attack_DAD_DoS_via_NS(iface=None, mac_src_filter=None, tgt_filter=None,
                              reply_mac=None):
    def ns_reply_callback(req, reply_mac, iface):
def NDP_Attack_DAD_DoS_via_NA(iface=None, mac_src_filter=None, tgt_filter=None,
                              reply_mac=None):
    def na_reply_callback(req, reply_mac, iface):
def NDP_Attack_NA_Spoofing(iface=None, mac_src_filter=None, tgt_filter=None,
                           reply_mac=None, router=False):
    def is_request(req, mac_src_filter, tgt_filter):
    def reply_callback(req, reply_mac, router, iface):
def NDP_Attack_NS_Spoofing(src_lladdr=None, src=None, target="2001:db8::1",
                           dst=None, src_mac=None, dst_mac=None, loop=True,
                           inter=1, iface=None):
def NDP_Attack_Kill_Default_Router(iface=None, mac_src_filter=None,
                                   ip_src_filter=None, reply_mac=None,
                                   tgt_mac=None):
    def is_request(req, mac_src_filter, ip_src_filter):
    def ra_reply_callback(req, reply_mac, tgt_mac, iface):
def NDP_Attack_Fake_Router(ra, iface=None, mac_src_filter=None,
                           ip_src_filter=None):
    def is_request(req, mac_src_filter, ip_src_filter):
    def ra_reply_callback(req, iface):
def _get_cls(name):
def _load_dict(d):
class IP6ListField(StrField):
class _IPv6GuessPayload:
class IPv6(_IPv6GuessPayload, Packet, IPTools):
class IPv46(IP):
class IPerror6(IPv6):
class PseudoIPv6(Packet):  # IPv6 Pseudo-header for checksum computation
class _IPv6ExtHdr(_IPv6GuessPayload, Packet):
class _OTypeField(ByteEnumField):
class HBHOptUnknown(Packet):  # IPv6 Hop-By-Hop Option
class Pad1(Packet):  # IPv6 Hop-By-Hop Option
class PadN(Packet):  # IPv6 Hop-By-Hop Option
class RouterAlert(Packet):  # RFC 2711 - IPv6 Hop-By-Hop Option
class Jumbo(Packet):  # IPv6 Hop-By-Hop Option
class HAO(Packet):  # IPv6 Destination Options Header Option
class _OptionsField(PacketListField):
class _PhantomAutoPadField(ByteField):
class IPv6ExtHdrHopByHop(_IPv6ExtHdr):
class IPv6ExtHdrDestOpt(_IPv6ExtHdr):
class IPv6ExtHdrRouting(_IPv6ExtHdr):
class IPv6ExtHdrSegmentRoutingTLV(Packet):
class IPv6ExtHdrSegmentRoutingTLVIngressNode(IPv6ExtHdrSegmentRoutingTLV):
class IPv6ExtHdrSegmentRoutingTLVEgressNode(IPv6ExtHdrSegmentRoutingTLV):
class IPv6ExtHdrSegmentRoutingTLVPad1(IPv6ExtHdrSegmentRoutingTLV):
class IPv6ExtHdrSegmentRoutingTLVPadN(IPv6ExtHdrSegmentRoutingTLV):
class IPv6ExtHdrSegmentRoutingTLVHMAC(IPv6ExtHdrSegmentRoutingTLV):
class IPv6ExtHdrSegmentRouting(_IPv6ExtHdr):
class IPv6ExtHdrFragment(_IPv6ExtHdr):
class _ICMPv6(Packet):
class _ICMPv6Error(_ICMPv6):
class ICMPv6Unknown(_ICMPv6):
class ICMPv6DestUnreach(_ICMPv6Error):
class ICMPv6PacketTooBig(_ICMPv6Error):
class ICMPv6TimeExceeded(_ICMPv6Error):
class ICMPv6ParamProblem(_ICMPv6Error):
class ICMPv6EchoRequest(_ICMPv6):
class ICMPv6EchoReply(ICMPv6EchoRequest):
class _ICMPv6ML(_ICMPv6):
class ICMPv6MLQuery(_ICMPv6ML):  # RFC 2710
class ICMPv6MLReport(_ICMPv6ML):  # RFC 2710
class ICMPv6MLDone(_ICMPv6ML):  # RFC 2710
class ICMPv6MLQuery2(_ICMPv6):  # RFC 3810
class ICMPv6MLDMultAddrRec(Packet):
class ICMPv6MLReport2(_ICMPv6):  # RFC 3810
class ICMPv6MRD_Advertisement(_ICMPv6):
class ICMPv6MRD_Solicitation(_ICMPv6):
class ICMPv6MRD_Termination(_ICMPv6):
class _ICMPv6NDGuessPayload:
class ICMPv6NDOptUnknown(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptSrcLLAddr(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptDstLLAddr(ICMPv6NDOptSrcLLAddr):
class ICMPv6NDOptPrefixInfo(_ICMPv6NDGuessPayload, Packet):
class TruncPktLenField(PacketLenField):
class ICMPv6NDOptRedirectedHdr(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptMTU(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptShortcutLimit(_ICMPv6NDGuessPayload, Packet):  # RFC 2491
class ICMPv6NDOptAdvInterval(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptHAInfo(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptIPAddr(_ICMPv6NDGuessPayload, Packet):  # RFC 4068
class ICMPv6NDOptNewRtrPrefix(_ICMPv6NDGuessPayload, Packet):  # RFC 4068
class ICMPv6NDOptLLA(_ICMPv6NDGuessPayload, Packet):     # RFC 4068
class ICMPv6NDOptMAP(_ICMPv6NDGuessPayload, Packet):     # RFC 4140
class _IP6PrefixField(IP6Field):
class ICMPv6NDOptRouteInfo(_ICMPv6NDGuessPayload, Packet):  # RFC 4191
class ICMPv6NDOptRDNSS(_ICMPv6NDGuessPayload, Packet):  # RFC 5006
class ICMPv6NDOptEFA(_ICMPv6NDGuessPayload, Packet):  # RFC 5175 (prev. 5075)
class DomainNameListField(StrLenField):
class ICMPv6NDOptDNSSL(_ICMPv6NDGuessPayload, Packet):  # RFC 6106
class ICMPv6ND_RS(_ICMPv6NDGuessPayload, _ICMPv6):
class ICMPv6ND_RA(_ICMPv6NDGuessPayload, _ICMPv6):
class ICMPv6ND_NS(_ICMPv6NDGuessPayload, _ICMPv6, Packet):
class ICMPv6ND_NA(_ICMPv6NDGuessPayload, _ICMPv6, Packet):
class ICMPv6ND_Redirect(_ICMPv6NDGuessPayload, _ICMPv6, Packet):
class ICMPv6NDOptSrcAddrList(_ICMPv6NDGuessPayload, Packet):
class ICMPv6NDOptTgtAddrList(ICMPv6NDOptSrcAddrList):
class ICMPv6ND_INDSol(_ICMPv6NDGuessPayload, _ICMPv6):
class ICMPv6ND_INDAdv(_ICMPv6NDGuessPayload, _ICMPv6):
class _ICMPv6NIHashret:
class _ICMPv6NIAnswers:
class NonceField(StrFixedLenField):
class NIQueryDataField(StrField):
class NIQueryCodeField(ByteEnumField):
class ICMPv6NIQueryNOOP(_ICMPv6NIHashret, _ICMPv6):
class ICMPv6NIQueryName(ICMPv6NIQueryNOOP):
class ICMPv6NIQueryIPv6(ICMPv6NIQueryNOOP):
class ICMPv6NIQueryIPv4(ICMPv6NIQueryNOOP):
class NIReplyDataField(StrField):
class ICMPv6NIReplyNOOP(_ICMPv6NIAnswers, _ICMPv6NIHashret, _ICMPv6):
class ICMPv6NIReplyName(ICMPv6NIReplyNOOP):
class ICMPv6NIReplyIPv6(ICMPv6NIReplyNOOP):
class ICMPv6NIReplyIPv4(ICMPv6NIReplyNOOP):
class ICMPv6NIReplyRefuse(ICMPv6NIReplyNOOP):
class ICMPv6NIReplyUnknown(ICMPv6NIReplyNOOP):
class ICMPv6RPL(_ICMPv6):   # RFC 6550
class ICMPv6HAADRequest(_ICMPv6):
class ICMPv6HAADReply(_ICMPv6):
class ICMPv6MPSol(_ICMPv6):
class ICMPv6MPAdv(_ICMPv6NDGuessPayload, _ICMPv6):
class _MIP6OptAlign(Packet):
class MIP6OptBRAdvice(_MIP6OptAlign):
class MIP6OptAltCoA(_MIP6OptAlign):
class MIP6OptNonceIndices(_MIP6OptAlign):
class MIP6OptBindingAuthData(_MIP6OptAlign):
class MIP6OptMobNetPrefix(_MIP6OptAlign):  # NEMO - RFC 3963
class MIP6OptLLAddr(_MIP6OptAlign):  # Sect 6.4.4 of RFC 4068
class MIP6OptMNID(_MIP6OptAlign):  # RFC 4283
class MIP6OptMsgAuth(_MIP6OptAlign):  # RFC 4285 (Sect. 5)
class NTPTimestampField(LongField):
class MIP6OptReplayProtection(_MIP6OptAlign):  # RFC 4285 (Sect. 6)
class MIP6OptCGAParamsReq(_MIP6OptAlign):  # RFC 4866 (Sect. 5.6)
class MIP6OptCGAParams(_MIP6OptAlign):  # RFC 4866 (Sect. 5.1)
class MIP6OptSignature(_MIP6OptAlign):  # RFC 4866 (Sect. 5.2)
class MIP6OptHomeKeygenToken(_MIP6OptAlign):  # RFC 4866 (Sect. 5.3)
class MIP6OptCareOfTestInit(_MIP6OptAlign):  # RFC 4866 (Sect. 5.4)
class MIP6OptCareOfTest(_MIP6OptAlign):  # RFC 4866 (Sect. 5.5)
class MIP6OptUnknown(_MIP6OptAlign):
class _MobilityHeader(Packet):
class MIP6MH_Generic(_MobilityHeader):  # Mainly for decoding of unknown msg
class MIP6MH_BRR(_MobilityHeader):
class MIP6MH_HoTI(_MobilityHeader):
class MIP6MH_CoTI(MIP6MH_HoTI):
class MIP6MH_HoT(_MobilityHeader):
class MIP6MH_CoT(MIP6MH_HoT):
class LifetimeField(ShortField):
class MIP6MH_BU(_MobilityHeader):
class MIP6MH_BA(_MobilityHeader):
class MIP6MH_BE(_MobilityHeader):
class AS_resolver6(AS_resolver_riswhois):
class TracerouteResult6(TracerouteResult):
class L3RawSocket6(L3RawSocket):
class _IPv6inIP(SuperSocket):
import struct
import time
import warnings
import scapy.modules.six as six
    import math
from scapy.config import conf
from scapy.packet import Packet, bind_layers, NoPayload
from scapy.fields import BitEnumField, BitField, ByteEnumField, ByteField, \
    ConditionalField, Field, FieldLenField, FlagsField, IntField, \
    PacketListField, ShortEnumField, ShortField, StrField, \
    StrLenField, MultipleTypeField, UTCTimeField
from scapy.compat import orb, raw, chb, bytes_encode
from scapy.ansmachine import AnsweringMachine
from scapy.sendrecv import sr1
from scapy.layers.inet import IP, DestIPField, IPField, UDP, TCP
from scapy.layers.inet6 import DestIP6Field, IP6Field
from scapy.error import log_runtime, warning, Scapy_Exception
from scapy.modules.six.moves import range
        # - self.default: used to set the default record
        self.rr = self.default = default
        self.passon = passon

    def i2m(self, pkt, x):
        if x is None:
            return b""
        return bytes_encode(x)

    def decodeRR(self, name, s, p):
        ret = s[p:p + 10]
        # type, cls, ttl, rdlen
        typ, cls, _, rdlen = struct.unpack("!HHIH", ret)
        p += 10
        cls = DNSRR_DISPATCHER.get(typ, DNSRR)
        rr = cls(b"\x00" + ret + s[p:p + rdlen], _orig_s=s, _orig_p=p)

        # Reset rdlen if DNS compression was used
        for fname in rr.fieldtype.keys():
            rdata_obj = rr.fieldtype[fname]
            if fname == "rdata" and isinstance(rdata_obj, MultipleTypeField):
                rdata_obj = rdata_obj._find_fld_pkt_val(rr, rr.type)[0]
            if isinstance(rdata_obj, DNSStrField) and rdata_obj.compressed:
                del rr.rdlen
                break
        rr.rrname = name

        p += rdlen
        return rr, p

    def getfield(self, pkt, s):
        if isinstance(s, tuple):
            s, p = s
        else:
            p = 0
        ret = None
        c = getattr(pkt, self.countfld)
        if c > len(s):
            log_runtime.info("DNS wrong value: DNS.%s=%i", self.countfld, c)
            return s, b""
        while c:
            c -= 1
            name, p, _, _ = dns_get_str(s, p, _fullpacket=True)
            rr, p = self.decodeRR(name, s, p)
            if ret is None:
                ret = rr
            else:
                ret.add_payload(rr)
        if self.passon:
            return (s, p), ret
        else:
            return s[p:], ret


class DNSQRField(DNSRRField):
    def decodeRR(self, name, s, p):
        ret = s[p:p + 4]
        p += 4
        rr = DNSQR(b"\x00" + ret, _orig_s=s, _orig_p=p)
        rr.qname = name
        return rr, p


class DNSTextField(StrLenField):
    """
    Special StrLenField that handles DNS TEXT data (16)
    """

    islist = 1

    def m2i(self, pkt, s):
        ret_s = list()
        tmp_s = s
        # RDATA contains a list of strings, each are prepended with
        # a byte containing the size of the following string.
        while tmp_s:
            tmp_len = orb(tmp_s[0]) + 1
            if tmp_len > len(tmp_s):
                log_runtime.info(
                    "DNS RR TXT prematured end of character-string "
                    "(size=%i, remaining bytes=%i)", tmp_len, len(tmp_s)
                )
            ret_s.append(tmp_s[1:tmp_len])
            tmp_s = tmp_s[tmp_len:]
        return ret_s

    def any2i(self, pkt, x):
        if isinstance(x, (str, bytes)):
            return [x]
        return x

    def i2len(self, pkt, x):
        return len(self.i2m(pkt, x))

    def i2m(self, pkt, s):
        ret_s = b""
        for text in s:
            text = bytes_encode(text)
            # The initial string must be split into a list of strings
            # prepended with theirs sizes.
            while len(text) >= 255:
                ret_s += b"\xff" + text[:255]
                text = text[255:]
            # The remaining string is less than 255 bytes long
            if len(text):
                ret_s += struct.pack("!B", len(text)) + text
        return ret_s


class DNSQR(InheritOriginDNSStrPacket):
    name = "DNS Question Record"
    show_indent = 0
    fields_desc = [DNSStrField("qname", "www.example.com"),
                   ShortEnumField("qtype", 1, dnsqtypes),
                   ShortEnumField("qclass", 1, dnsclasses)]


class DNS(Packet):
    name = "DNS"
    fields_desc = [

        ConditionalField(ShortField("length", None),