# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild from pkg_resources import parse_version from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO import collections if parse_version(ks_version) < parse_version('0.7'): raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version)) from . import protocol_body class Ipv4Packet(KaitaiStruct): SEQ_FIELDS = ["b1", "b2", "total_length", "identification", "b67", "ttl", "protocol", "header_checksum", "src_ip_addr", "dst_ip_addr", "options", "body"] def __init__(self, _io, _parent=None, _root=None): self._io = _io self._parent = _parent self._root = _root if _root else self self._debug = collections.defaultdict(dict) def _read(self): self._debug['b1']['start'] = self._io.pos() self.b1 = self._io.read_u1() self._debug['b1']['end'] = self._io.pos() self._debug['b2']['start'] = self._io.pos() self.b2 = self._io.read_u1() self._debug['b2']['end'] = self._io.pos() self._debug['total_length']['start'] = self._io.pos() self.total_length = self._io.read_u2be() self._debug['total_length']['end'] = self._io.pos() self._debug['identification']['start'] = self._io.pos() self.identification = self._io.read_u2be() self._debug['identification']['end'] = self._io.pos() self._debug['b67']['start'] = self._io.pos() self.b67 = self._io.read_u2be() self._debug['b67']['end'] = self._io.pos() self._debug['ttl']['start'] = self._io.pos() self.ttl = self._io.read_u1() self._debug['ttl']['end'] = self._io.pos() self._debug['protocol']['start'] = self._io.pos() self.protocol = self._io.read_u1() self._debug['protocol']['end'] = self._io.pos() self._debug['header_checksum']['start'] = self._io.pos() self.header_checksum = self._io.read_u2be() self._debug['header_checksum']['end'] = self._io.pos() self._debug['src_ip_addr']['start'] = self._io.pos() self.src_ip_addr = self._io.read_bytes(4) self._debug['src_ip_addr']['end'] = self._io.pos() self._debug['dst_ip_addr']['start'] = self._io.pos() self.dst_ip_addr = self._io.read_bytes(4) self._debug['dst_ip_addr']['end'] = self._io.pos() self._debug['options']['start'] = self._io.pos() self._raw_options = self._io.read_bytes((self.ihl_bytes - 20)) io = KaitaiStream(BytesIO(self._raw_options)) self.options = self._root.Ipv4Options(io, self, self._root) self.options._read() self._debug['options']['end'] = self._io.pos() self._debug['body']['start'] = self._io.pos() self._raw_body = self._io.read_bytes((self.total_length - self.ihl_bytes)) io = KaitaiStream(BytesIO(self._raw_body)) self.body = protocol_body.ProtocolBody(self.protocol, io) self.body._read() self._debug['body']['end'] = self._io.pos() class Ipv4Options(KaitaiStruct): SEQ_FIELDS = ["entries"] def __init__(self, _io, _parent=None, _root=None): self._io = _io self._parent = _parent self._root = _root if _root else self self._debug = collections.defaultdict(dict) def _read(self): self._debug['entries']['start'] = self._io.pos() self.entries = [] i = 0 while not self._io.is_eof(): if not 'arr' in self._debug['entries']: self._debug['entries']['arr'] = [] self._debug['entries']['arr'].append({'start': self._io.pos()}) _t_entries = self._root.Ipv4Option(self._io, self, self._root) _t_entries._read() self.entries.append(_t_entries) self._debug['entries']['arr'][len(self.entries) - 1]['end'] = self._io.pos() i += 1 self._debug['entries']['end'] = self._io.pos() class Ipv4Option(KaitaiStruct): SEQ_FIELDS = ["b1", "len", "body"] def __init__(self, _io, _parent=None, _root=None): self._io = _io self._parent = _parent self._root = _root if _root else self self._debug = collections.defaultdict(dict) def _read(self): self._debug['b1']['start'] = self._io.pos() self.b1 = self._io.read_u1() self._debug['b1']['end'] = self._io.pos() self._debug['len']['start'] = self._io.pos() self.len = self._io.read_u1() self._debug['len']['end'] = self._io.pos() self._debug['body']['start'] = self._io.pos() self.body = self._io.read_bytes(((self.len - 2) if self.len > 2 else 0)) self._debug['body']['end'] = self._io.pos() @property def copy(self): if hasattr(self, '_m_copy'): return self._m_copy if hasattr(self, '_m_copy') else None self._m_copy = ((self.b1 & 128) >> 7) return self._m_copy if hasattr(self, '_m_copy') else None @property def opt_class(self): if hasattr(self, '_m_opt_class'): return self._m_opt_class if hasattr(self, '_m_opt_class') else None self._m_opt_class = ((self.b1 & 96) >> 5) return self._m_opt_class if hasattr(self, '_m_opt_class') else None @property def number(self): if hasattr(self, '_m_number'): return self._m_number if hasattr(self, '_m_number') else None self._m_number = (self.b1 & 31) return self._m_number if hasattr(self, '_m_number') else None @property def version(self): if hasattr(self, '_m_version'): return self._m_version if hasattr(self, '_m_version') else None self._m_version = ((self.b1 & 240) >> 4) return self._m_version if hasattr(self, '_m_version') else None @property def ihl(self): if hasattr(self, '_m_ihl'): return self._m_ihl if hasattr(self, '_m_ihl') else None self._m_ihl = (self.b1 & 15) return self._m_ihl if hasattr(self, '_m_ihl') else None @property def ihl_bytes(self): if hasattr(self, '_m_ihl_bytes'): return self._m_ihl_bytes if hasattr(self, '_m_ihl_bytes') else None self._m_ihl_bytes = (self.ihl * 4) return self._m_ihl_bytes if hasattr(self, '_m_ihl_bytes') else None