def _import_next_layer(self, proto, length=None): # pylint: disable=unused-argument
"""Import next layer extractor.
Arguments:
proto (int): next layer protocol index
length (int): valid (*non-padding*) length
Returns:
pcapkit.protocols.protocol.Protocol: instance of next layer
"""
if length is not None and length == 0:
from pcapkit.protocols.null import NoPayload as protocol # pylint: disable=import-outside-toplevel
elif self._sigterm:
from pcapkit.protocols.raw import Raw as protocol # pylint: disable=import-outside-toplevel
else:
module, name = self.__proto__[proto]
protocol = getattr(importlib.import_module(module), name)
next_ = protocol(io.BytesIO(self._read_fileng(length)),
length,
layer=self._exlayer,
protocol=self._exproto)
return next_
def _import_next_layer(self, proto, length=None):
"""Import next layer extractor.
This method currently supports following protocols as registered in
:data:`~pcapkit.const.reg.ethertype.EtherType`:
.. list-table::
:header-rows: 1
* - ``proto``
- Protocol
* - 0x0806
- :class:`~pcapkit.protocols.link.arp.ARP`
* - 0x8035
- :class:`~pcapkit.protocols.link.rarp.RARP`
* - 0x8100
- :class:`~pcapkit.protocols.link.vlan.VLAN`
* - 0x0800
- :class:`~pcapkit.protocols.internet.ipv4.IPv4`
* - 0x86DD
- :class:`~pcapkit.protocols.internet.ipv6.IPv6`
* - 0x8137
- :class:`~pcapkit.protocols.internet.ipx.IPX`
Arguments:
proto (int): next layer protocol index
length (int): valid (*non-padding*) length
Returns:
pcapkit.protocols.protocol.Protocol: instance of next layer
"""
if length == 0:
from pcapkit.protocols.null import \
NoPayload as protocol # pylint: disable=import-outside-toplevel
elif self._sigterm:
from pcapkit.protocols.raw import \
Raw as protocol # pylint: disable=import-outside-toplevel
else:
module, name = self.__proto__[proto]
try:
protocol = getattr(importlib.import_module(module), name)
except (ImportError, AttributeError):
from pcapkit.protocols.raw import \
Raw as protocol # pylint: disable=import-outside-toplevel
next_ = protocol(self._file,
length,
error=self._onerror,
layer=self._exlayer,
protocol=self._exproto)
return next_
def _import_next_layer(self,
proto,
length=None,
*,
version=4,
extension=False): # pylint: disable=arguments-differ
"""Import next layer extractor.
This method currently supports following protocols as registered in
:data:`~pcapkit.const.reg.transtype.TransType`:
.. list-table::
:header-rows: 1
* - ``proto``
- Class
* - 0
- :class:`~pcapkit.protocols.internet.hopopt.HOPOPT`
* - 4
- :class:`~pcapkit.protocols.internet.ipv4.IPv4`
* - 6
- :class:`~pcapkit.protocols.transport.tcp.TCP`
* - 17
- :class:`~pcapkit.protocols.transport.udp.UDP`
* - 41
- :class:`~pcapkit.protocols.internet.ipv6.IPv6`
* - 43
- :class:`~pcapkit.protocols.internet.ipv6_route.IPv6_Route`
* - 44
- :class:`~pcapkit.protocols.internet.ipv6_frag.IPv6_Frag`
* - 51
- :class:`~pcapkit.protocols.internet.ah.AH`
* - 60
- :class:`~pcapkit.protocols.internet.ipv6_opts.IPv6_Opts`
* - 111
- :class:`~pcapkit.protocols.internet.ipx.IPX`
* - 135
- :class:`~pcapkit.protocols.internet.mh.MH`
* - 139
- :class:`~pcapkit.protocols.internet.hip.HIP`
Arguments:
proto (int): next layer protocol index
length (int): valid (*non-padding*) length
Keyword Arguments:
version (Literal[4, 6]): IP protocol version
extension (bool): if is extension header
Returns:
pcapkit.protocols.protocol.Protocol: instance of next layer
"""
if length == 0:
from pcapkit.protocols.null import NoPayload as protocol # pylint: disable=import-outside-toplevel
elif self._sigterm or proto == 59: # No Next Header for IPv6
from pcapkit.protocols.raw import Raw as protocol # pylint: disable=import-outside-toplevel
else:
module, name = self.__proto__[proto]
try:
protocol = getattr(importlib.import_module(module), name)
except (ImportError, AttributeError):
from pcapkit.protocols.raw import Raw as protocol # pylint: disable=import-outside-toplevel
next_ = protocol(self._file,
length,
version=version,
extension=extension,
error=self._onerror,
layer=self._exlayer,
protocol=self._exproto)
return next_