129 lines
4.4 KiB
Python
129 lines
4.4 KiB
Python
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# This file is part of Scapy
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# Scapy is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# any later version.
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#
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# Scapy is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Scapy. If not, see <http://www.gnu.org/licenses/>.
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"""
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Copyright 2012, The MITRE Corporation::
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NOTICE
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This software/technical data was produced for the U.S. Government
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under Prime Contract No. NASA-03001 and JPL Contract No. 1295026
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and is subject to FAR 52.227-14 (6/87) Rights in Data General,
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and Article GP-51, Rights in Data General, respectively.
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This software is publicly released under MITRE case #12-3054
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"""
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# scapy.contrib.description = Bundle Protocol (BP)
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# scapy.contrib.status = loads
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from scapy.packet import Packet, bind_layers
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from scapy.fields import ByteEnumField, ByteField, ConditionalField, \
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StrLenField
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from scapy.contrib.sdnv import SDNV2FieldLenField, SDNV2LenField, SDNV2
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from scapy.contrib.ltp import LTP, ltp_bind_payload
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class BP(Packet):
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name = "BP"
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fields_desc = [ByteField('version', 0x06),
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SDNV2('ProcFlags', 0),
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SDNV2LenField('BlockLen', None),
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SDNV2('DSO', 0),
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SDNV2('DSSO', 0),
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SDNV2('SSO', 0),
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SDNV2('SSSO', 0),
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SDNV2('RTSO', 0),
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SDNV2('RTSSO', 0),
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SDNV2('CSO', 0),
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SDNV2('CSSO', 0),
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SDNV2('CT', 0),
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SDNV2('CTSN', 0),
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SDNV2('LT', 0),
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SDNV2('DL', 0),
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ConditionalField(SDNV2("FO", 0), lambda x: (
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x.ProcFlags & 0x01)),
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ConditionalField(SDNV2("ADUL", 0), lambda x: (
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x.ProcFlags & 0x01)),
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]
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def mysummary(self):
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tmp = "BP(%version%) flags("
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if (self.ProcFlags & 0x01):
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tmp += ' FR'
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if (self.ProcFlags & 0x02):
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tmp += ' AR'
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if (self.ProcFlags & 0x04):
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tmp += ' DF'
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if (self.ProcFlags & 0x08):
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tmp += ' CT'
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if (self.ProcFlags & 0x10):
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tmp += ' S'
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if (self.ProcFlags & 0x20):
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tmp += ' ACKME'
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RAWCOS = (self.ProcFlags & 0x0180)
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COS = RAWCOS >> 7
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cos_tmp = ''
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if COS == 0x00:
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cos_tmp += 'B '
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if COS == 0x01:
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cos_tmp += 'N '
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if COS == 0x02:
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cos_tmp += 'E '
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if COS & 0xFE000:
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cos_tmp += 'SRR: ('
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if COS & 0x02000:
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cos_tmp += 'Rec '
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if COS & 0x04000:
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cos_tmp += 'CA '
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if COS & 0x08000:
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cos_tmp += 'FWD '
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if COS & 0x10000:
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cos_tmp += 'DLV '
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if COS & 0x20000:
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cos_tmp += 'DEL '
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if COS & 0xFE000:
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cos_tmp += ') '
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if cos_tmp:
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tmp += ' Pr: ' + cos_tmp
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tmp += " ) len(%BlockLen%) "
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if self.DL == 0:
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tmp += "CBHE: d[%DSO%,%DSSO%] s[%SSO%, %SSSO%] r[%RTSO%, %RTSSO%] c[%CSO%, %CSSO%] " # noqa: E501
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else:
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tmp += "dl[%DL%] "
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tmp += "ct[%CT%] ctsn[%CTSN%] lt[%LT%] "
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if (self.ProcFlags & 0x01):
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tmp += "fo[%FO%] "
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tmp += "tl[%ADUL%]"
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return self.sprintf(tmp), [LTP]
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class BPBLOCK(Packet):
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fields_desc = [ByteEnumField('Type', 1, {1: "Bundle payload block"}),
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SDNV2('ProcFlags', 0),
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SDNV2FieldLenField('BlockLen', None, length_of="load"),
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StrLenField("load", "",
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length_from=lambda pkt: pkt.BlockLen,
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max_length=65535)
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]
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def mysummary(self):
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return self.sprintf("BPBLOCK(%Type%) Flags: %ProcFlags% Len: %BlockLen%") # noqa: E501
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ltp_bind_payload(BP, lambda pkt: pkt.DATA_ClientServiceID == 1)
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bind_layers(BP, BPBLOCK)
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bind_layers(BPBLOCK, BPBLOCK)
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