SOME/IP (Scalable service-Oriented MiddlewarE over IP) is an automotive/embedded communication protocol which supports remoteprocedure calls, event notifications and the underlying serialization/wire format.
This page hosts a formal specification of AUTOSAR SOME/IP using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
# type: ignore
import kaitaistruct
from kaitaistruct import ReadWriteKaitaiStruct, KaitaiStream, BytesIO
import some_ip_sd
from enum import IntEnum
if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 11):
raise Exception("Incompatible Kaitai Struct Python API: 0.11 or later is required, but you have %s" % (kaitaistruct.__version__))
class SomeIp(ReadWriteKaitaiStruct):
"""SOME/IP (Scalable service-Oriented MiddlewarE over IP) is an automotive/embedded
communication protocol which supports remoteprocedure calls, event notifications
and the underlying serialization/wire format.
.. seealso::
Source - https://www.autosar.org/fileadmin/standards/foundation/19-11/AUTOSAR_PRS_SOMEIPProtocol.pdf
"""
def __init__(self, _io=None, _parent=None, _root=None):
super(SomeIp, self).__init__(_io)
self._parent = _parent
self._root = _root or self
def _read(self):
self.header = SomeIp.Header(self._io, self, self._root)
self.header._read()
_on = self.header.message_id.value
if _on == 4294934784:
pass
self._raw_payload = self._io.read_bytes(self.header.length - 8)
_io__raw_payload = KaitaiStream(BytesIO(self._raw_payload))
self.payload = some_ip_sd.SomeIpSd(_io__raw_payload)
self.payload._read()
else:
pass
self.payload = self._io.read_bytes(self.header.length - 8)
self._dirty = False
def _fetch_instances(self):
pass
self.header._fetch_instances()
_on = self.header.message_id.value
if _on == 4294934784:
pass
self.payload._fetch_instances()
else:
pass
def _write__seq(self, io=None):
super(SomeIp, self)._write__seq(io)
self.header._write__seq(self._io)
_on = self.header.message_id.value
if _on == 4294934784:
pass
_io__raw_payload = KaitaiStream(BytesIO(bytearray(self.header.length - 8)))
self._io.add_child_stream(_io__raw_payload)
_pos2 = self._io.pos()
self._io.seek(self._io.pos() + (self.header.length - 8))
def handler(parent, _io__raw_payload=_io__raw_payload):
self._raw_payload = _io__raw_payload.to_byte_array()
if len(self._raw_payload) != self.header.length - 8:
raise kaitaistruct.ConsistencyError(u"raw(payload)", self.header.length - 8, len(self._raw_payload))
parent.write_bytes(self._raw_payload)
_io__raw_payload.write_back_handler = KaitaiStream.WriteBackHandler(_pos2, handler)
self.payload._write__seq(_io__raw_payload)
else:
pass
self._io.write_bytes(self.payload)
def _check(self):
if self.header._root != self._root:
raise kaitaistruct.ConsistencyError(u"header", self._root, self.header._root)
if self.header._parent != self:
raise kaitaistruct.ConsistencyError(u"header", self, self.header._parent)
_on = self.header.message_id.value
if _on == 4294934784:
pass
else:
pass
if len(self.payload) != self.header.length - 8:
raise kaitaistruct.ConsistencyError(u"payload", self.header.length - 8, len(self.payload))
self._dirty = False
class Header(ReadWriteKaitaiStruct):
class MessageTypeEnum(IntEnum):
request = 0
request_no_return = 1
notification = 2
request_ack = 64
request_no_return_ack = 65
notification_ack = 66
response = 128
error = 129
response_ack = 192
error_ack = 193
class ReturnCodeEnum(IntEnum):
ok = 0
not_ok = 1
unknown_service = 2
unknown_method = 3
not_ready = 4
not_reachable = 5
time_out = 6
wrong_protocol_version = 7
wrong_interface_version = 8
malformed_message = 9
wrong_message_type = 10
def __init__(self, _io=None, _parent=None, _root=None):
super(SomeIp.Header, self).__init__(_io)
self._parent = _parent
self._root = _root
def _read(self):
self._raw_message_id = self._io.read_bytes(4)
_io__raw_message_id = KaitaiStream(BytesIO(self._raw_message_id))
self.message_id = SomeIp.Header.MessageId(_io__raw_message_id, self, self._root)
self.message_id._read()
self.length = self._io.read_u4be()
self._raw_request_id = self._io.read_bytes(4)
_io__raw_request_id = KaitaiStream(BytesIO(self._raw_request_id))
self.request_id = SomeIp.Header.RequestId(_io__raw_request_id, self, self._root)
self.request_id._read()
self.protocol_version = self._io.read_u1()
self.interface_version = self._io.read_u1()
self.message_type = KaitaiStream.resolve_enum(SomeIp.Header.MessageTypeEnum, self._io.read_u1())
self.return_code = KaitaiStream.resolve_enum(SomeIp.Header.ReturnCodeEnum, self._io.read_u1())
self._dirty = False
def _fetch_instances(self):
pass
self.message_id._fetch_instances()
self.request_id._fetch_instances()
def _write__seq(self, io=None):
super(SomeIp.Header, self)._write__seq(io)
_io__raw_message_id = KaitaiStream(BytesIO(bytearray(4)))
self._io.add_child_stream(_io__raw_message_id)
_pos2 = self._io.pos()
self._io.seek(self._io.pos() + (4))
def handler(parent, _io__raw_message_id=_io__raw_message_id):
self._raw_message_id = _io__raw_message_id.to_byte_array()
if len(self._raw_message_id) != 4:
raise kaitaistruct.ConsistencyError(u"raw(message_id)", 4, len(self._raw_message_id))
parent.write_bytes(self._raw_message_id)
_io__raw_message_id.write_back_handler = KaitaiStream.WriteBackHandler(_pos2, handler)
self.message_id._write__seq(_io__raw_message_id)
self._io.write_u4be(self.length)
_io__raw_request_id = KaitaiStream(BytesIO(bytearray(4)))
self._io.add_child_stream(_io__raw_request_id)
_pos2 = self._io.pos()
self._io.seek(self._io.pos() + (4))
def handler(parent, _io__raw_request_id=_io__raw_request_id):
self._raw_request_id = _io__raw_request_id.to_byte_array()
if len(self._raw_request_id) != 4:
raise kaitaistruct.ConsistencyError(u"raw(request_id)", 4, len(self._raw_request_id))
parent.write_bytes(self._raw_request_id)
_io__raw_request_id.write_back_handler = KaitaiStream.WriteBackHandler(_pos2, handler)
self.request_id._write__seq(_io__raw_request_id)
self._io.write_u1(self.protocol_version)
self._io.write_u1(self.interface_version)
self._io.write_u1(int(self.message_type))
self._io.write_u1(int(self.return_code))
def _check(self):
if self.message_id._root != self._root:
raise kaitaistruct.ConsistencyError(u"message_id", self._root, self.message_id._root)
if self.message_id._parent != self:
raise kaitaistruct.ConsistencyError(u"message_id", self, self.message_id._parent)
if self.request_id._root != self._root:
raise kaitaistruct.ConsistencyError(u"request_id", self._root, self.request_id._root)
if self.request_id._parent != self:
raise kaitaistruct.ConsistencyError(u"request_id", self, self.request_id._parent)
self._dirty = False
class MessageId(ReadWriteKaitaiStruct):
"""[PRS_SOMEIP_00035] The assignment of the Message ID shall be up to
the user. However, the Message ID shall be unique for the whole
system (i.e. the vehicle). TheMessage ID is similar to a CAN ID and
should be handled via a comparable process.
[PRS_SOMEIP_00038] Message IDs of method calls shall be structured in
the ID with 2^16 services with 2^15 methods.
.. seealso::
AUTOSAR_PRS_SOMEIPProtocol.pdf 4.1.1.1 Message ID
"""
def __init__(self, _io=None, _parent=None, _root=None):
super(SomeIp.Header.MessageId, self).__init__(_io)
self._parent = _parent
self._root = _root
self._should_write_value = False
self.value__enabled = True
def _read(self):
self.service_id = self._io.read_u2be()
self.sub_id = self._io.read_bits_int_be(1) != 0
if self.sub_id == False:
pass
self.method_id = self._io.read_bits_int_be(15)
if self.sub_id == True:
pass
self.event_id = self._io.read_bits_int_be(15)
self._dirty = False
def _fetch_instances(self):
pass
if self.sub_id == False:
pass
if self.sub_id == True:
pass
_ = self.value
if hasattr(self, '_m_value'):
pass
def _write__seq(self, io=None):
super(SomeIp.Header.MessageId, self)._write__seq(io)
self._should_write_value = self.value__enabled
self._io.write_u2be(self.service_id)
self._io.write_bits_int_be(1, int(self.sub_id))
if self.sub_id == False:
pass
self._io.write_bits_int_be(15, self.method_id)
if self.sub_id == True:
pass
self._io.write_bits_int_be(15, self.event_id)
def _check(self):
if self.sub_id == False:
pass
if self.sub_id == True:
pass
if self.value__enabled:
pass
self._dirty = False
@property
def value(self):
"""The value provides the undissected Message ID."""
if self._should_write_value:
self._write_value()
if hasattr(self, '_m_value'):
return self._m_value
if not self.value__enabled:
return None
_pos = self._io.pos()
self._io.seek(0)
self._m_value = self._io.read_u4be()
self._io.seek(_pos)
return getattr(self, '_m_value', None)
@value.setter
def value(self, v):
self._dirty = True
self._m_value = v
def _write_value(self):
self._should_write_value = False
_pos = self._io.pos()
self._io.seek(0)
self._io.write_u4be(self._m_value)
self._io.seek(_pos)
class RequestId(ReadWriteKaitaiStruct):
"""The Request ID allows a provider and subscriber to differentiate
multiple parallel usesof the same method, event, getter or setter.
.. seealso::
AUTOSAR_PRS_SOMEIPProtocol.pdf - section 4.1.1.3 Request ID
"""
def __init__(self, _io=None, _parent=None, _root=None):
super(SomeIp.Header.RequestId, self).__init__(_io)
self._parent = _parent
self._root = _root
self._should_write_value = False
self.value__enabled = True
def _read(self):
self.client_id = self._io.read_u2be()
self.session_id = self._io.read_u2be()
self._dirty = False
def _fetch_instances(self):
pass
_ = self.value
if hasattr(self, '_m_value'):
pass
def _write__seq(self, io=None):
super(SomeIp.Header.RequestId, self)._write__seq(io)
self._should_write_value = self.value__enabled
self._io.write_u2be(self.client_id)
self._io.write_u2be(self.session_id)
def _check(self):
if self.value__enabled:
pass
self._dirty = False
@property
def value(self):
"""The value provides the undissected Request ID."""
if self._should_write_value:
self._write_value()
if hasattr(self, '_m_value'):
return self._m_value
if not self.value__enabled:
return None
_pos = self._io.pos()
self._io.seek(0)
self._m_value = self._io.read_u4be()
self._io.seek(_pos)
return getattr(self, '_m_value', None)
@value.setter
def value(self, v):
self._dirty = True
self._m_value = v
def _write_value(self):
self._should_write_value = False
_pos = self._io.pos()
self._io.seek(0)
self._io.write_u4be(self._m_value)
self._io.seek(_pos)
@property
def is_valid_service_discovery(self):
"""auxillary value.
.. seealso::
AUTOSAR_PRS_SOMEIPServiceDiscoveryProtocol.pdf - section 4.1.2.1 General Requirements
"""
if hasattr(self, '_m_is_valid_service_discovery'):
return self._m_is_valid_service_discovery
self._m_is_valid_service_discovery = ((self.message_id.value == 4294934784) and (self.protocol_version == 1) and (self.interface_version == 1) and (self.message_type == SomeIp.Header.MessageTypeEnum.notification) and (self.return_code == SomeIp.Header.ReturnCodeEnum.ok))
return getattr(self, '_m_is_valid_service_discovery', None)
def _invalidate_is_valid_service_discovery(self):
del self._m_is_valid_service_discovery