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+# BSD LICENSE
+#
+# Copyright(c) 2010-2021 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+import os
+from collections import OrderedDict
+
+from scapy.all import conf
+from scapy.fields import ConditionalField
+from scapy.packet import NoPayload
+from scapy.packet import Packet as scapyPacket
+from scapy.utils import rdpcap
+
+
+class PacketParser(object):
+ """parse packet full layers information"""
+
+ def __init__(self):
+ self.packetLayers = OrderedDict()
+ self.framesize = 64
+
+ def _parse_packet_layer(self, pkt_object):
+ """parse one packet every layers' fields and value"""
+ if pkt_object is None:
+ return
+
+ self.packetLayers[pkt_object.name] = OrderedDict()
+ for curfield in pkt_object.fields_desc:
+ if isinstance(curfield, ConditionalField) and not curfield._evalcond(
+ pkt_object
+ ):
+ continue
+ field_value = pkt_object.getfieldval(curfield.name)
+ if isinstance(field_value, scapyPacket) or (
+ curfield.islist and curfield.holds_packets and type(field_value) is list
+ ):
+ continue
+ repr_value = curfield.i2repr(pkt_object, field_value)
+ if isinstance(repr_value, str):
+ repr_value = repr_value.replace(
+ os.linesep, os.linesep + " " * (len(curfield.name) + 4)
+ )
+ self.packetLayers[pkt_object.name][curfield.name] = repr_value
+
+ if isinstance(pkt_object.payload, NoPayload):
+ return
+ else:
+ self._parse_packet_layer(pkt_object.payload)
+
+ def _parse_pcap(self, pcapFile, number=0):
+ """parse one packet content"""
+ self.packetLayers = OrderedDict()
+ pcap_pkts = []
+ if isinstance(pcapFile, str):
+ if os.path.exists(pcapFile) is False:
+ warning = "{0} is not exist !".format(pcapFile)
+ raise Exception(warning)
+ pcap_pkts = rdpcap(pcapFile)
+ else:
+ pcap_pkts = pcapFile
+ # parse packets' every layers and fields
+ if len(pcap_pkts) == 0:
+ warning = "{0} is empty".format(pcapFile)
+ raise Exception(warning)
+ elif number >= len(pcap_pkts):
+ warning = "{0} is missing No.{1} packet".format(pcapFile, number)
+ raise Exception(warning)
+ else:
+ self._parse_packet_layer(pcap_pkts[number])
+ self.framesize = len(pcap_pkts[number]) + 4