| # This file is part of Scapy |
| # See http://www.secdev.org/projects/scapy for more informations |
| # Copyright (C) Philippe Biondi <phil@secdev.org> |
| # This program is published under a GPLv2 license |
| |
| |
| """A minimal implementation of the CANopen protocol, based on |
| Wireshark dissectors. See https://wiki.wireshark.org/CANopen |
| |
| """ |
| |
| |
| from scapy.config import conf |
| from scapy.data import DLT_CAN_SOCKETCAN |
| from scapy.fields import BitField, FieldLenField, FlagsField, StrLenField, \ |
| ThreeBytesField, XBitField |
| from scapy.packet import Packet |
| |
| |
| class CAN(Packet): |
| """A minimal implementation of the CANopen protocol, based on |
| Wireshark dissectors. See https://wiki.wireshark.org/CANopen |
| |
| """ |
| fields_desc = [ |
| FlagsField("flags", 0, 3, ["extended", "remote_transmission_request", |
| "error"]), |
| BitField("unknown", 0, 18), |
| XBitField("identifier", 0, 11), |
| FieldLenField("length", None, length_of="data", fmt="B"), |
| ThreeBytesField("reserved", 0), |
| StrLenField("data", "", length_from=lambda pkt: pkt.length), |
| ] |
| |
| |
| conf.l2types.register(DLT_CAN_SOCKETCAN, CAN) |
