61 lines
2.6 KiB
Python
61 lines
2.6 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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# scapy.contrib.description = Cisco HDLC and SLARP
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# scapy.contrib.status = loads
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# This layer is based on information from http://www.nethelp.no/net/cisco-hdlc.txt # noqa: E501
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from scapy.data import DLT_C_HDLC
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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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IntEnumField, IntField, IPField, XShortField
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from scapy.layers.l2 import Dot3, STP
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from scapy.layers.inet import IP
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from scapy.layers.inet6 import IPv6
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from scapy.config import conf
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class CHDLC(Packet):
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name = "Cisco HDLC"
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fields_desc = [ByteEnumField("address", 0x0f, {0x0f: "unicast", 0x8f: "multicast"}), # noqa: E501
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ByteField("control", 0),
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XShortField("proto", 0x0800)]
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class SLARP(Packet):
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name = "SLARP"
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fields_desc = [IntEnumField("type", 2, {0: "request", 1: "reply", 2: "line keepalive"}), # noqa: E501
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ConditionalField(IPField("address", "192.168.0.1"),
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lambda pkt: pkt.type == 0 or pkt.type == 1), # noqa: E501
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ConditionalField(IPField("mask", "255.255.255.0"),
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lambda pkt: pkt.type == 0 or pkt.type == 1), # noqa: E501
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ConditionalField(XShortField("unused", 0),
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lambda pkt: pkt.type == 0 or pkt.type == 1), # noqa: E501
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ConditionalField(IntField("mysequence", 0),
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lambda pkt: pkt.type == 2),
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ConditionalField(IntField("yoursequence", 0),
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lambda pkt: pkt.type == 2),
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ConditionalField(XShortField("reliability", 0xffff),
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lambda pkt: pkt.type == 2)]
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bind_layers(CHDLC, Dot3, proto=0x6558)
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bind_layers(CHDLC, IP, proto=0x800)
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bind_layers(CHDLC, IPv6, proto=0x86dd)
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bind_layers(CHDLC, SLARP, proto=0x8035)
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bind_layers(CHDLC, STP, proto=0x4242)
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conf.l2types.register(DLT_C_HDLC, CHDLC)
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