95 lines
2.9 KiB
Python
95 lines
2.9 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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# author: <jellch@harris.com>
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# scapy.contrib.description = CACE Per-Packet Information (PPI)
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# scapy.contrib.status = loads
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"""
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CACE PPI types
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"""
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from scapy.data import PPI_DOT11COMMON
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from scapy.packet import bind_layers
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from scapy.fields import ByteField, Field, FlagsField, LELongField, \
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LEShortField
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from scapy.layers.ppi import PPI_Hdr, PPI_Element
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# PPI 802.11 Common Field Header Fields
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class dBmByteField(Field):
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def __init__(self, name, default):
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Field.__init__(self, name, default, "b")
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def i2repr(self, pkt, x):
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if x is not None:
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x = "%4d dBm" % x
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return x
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class PPITSFTField(LELongField):
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def i2h(self, pkt, x):
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flags = 0
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if pkt:
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flags = pkt.getfieldval("Pkt_Flags")
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if not flags:
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flags = 0
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if flags & 0x02:
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scale = 1e-3
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else:
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scale = 1e-6
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tout = scale * float(x)
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return tout
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def h2i(self, pkt, x):
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scale = 1e6
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if pkt:
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flags = pkt.getfieldval("Pkt_Flags")
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if flags and (flags & 0x02):
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scale = 1e3
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tout = int((scale * x) + 0.5)
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return tout
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_PPIDot11CommonChFlags = [
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'', '', '', '', 'Turbo', 'CCK', 'OFDM', '2GHz', '5GHz',
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'PassiveOnly', 'Dynamic CCK-OFDM', 'GSFK']
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_PPIDot11CommonPktFlags = ['FCS', 'TSFT_ms', 'FCS_Invalid', 'PHY_Error']
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# PPI 802.11 Common Field Header
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class PPI_Dot11Common(PPI_Element):
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name = "PPI 802.11-Common"
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fields_desc = [PPITSFTField('TSF_Timer', 0),
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FlagsField('Pkt_Flags', 0, -16, _PPIDot11CommonPktFlags),
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LEShortField('Rate', 0),
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LEShortField('Ch_Freq', 0),
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FlagsField('Ch_Flags', 0, -16, _PPIDot11CommonChFlags),
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ByteField('FHSS_Hop', 0),
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ByteField('FHSS_Pat', 0),
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dBmByteField('Antsignal', -128),
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dBmByteField('Antnoise', -128)]
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def extract_padding(self, s):
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return b'', s
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# Hopefully other CACE defined types will be added here.
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# Add the dot11common layer to the PPI array
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bind_layers(PPI_Hdr, PPI_Dot11Common, pfh_type=PPI_DOT11COMMON)
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