# This file is part of Scapy
# See http://www.secdev.org/projects/scapy for more information
# Copyright (C) Nils Weiss <nils@we155.de>
# This program is published under a GPLv2 license

# scapy.contrib.description = CANSocket Utils
# scapy.contrib.status = loads

"""
CANSocket.
"""

from scapy.error import log_loading
from scapy.consts import LINUX
from scapy.config import conf
import scapy.modules.six as six

PYTHON_CAN = False

try:
    if conf.contribs['CANSocket']['use-python-can']:
        from can import BusABC as can_BusABC    # noqa: F401
        PYTHON_CAN = True
    else:
        PYTHON_CAN = False
except ImportError:
    log_loading.info("Can't import python-can.")
except KeyError:
    log_loading.info("Configuration 'conf.contribs['CANSocket'] not found.")


if PYTHON_CAN:
    log_loading.info("Using python-can CANSocket.")
    log_loading.info("Specify 'conf.contribs['CANSocket'] = "
                     "{'use-python-can': False}' to enable native CANSockets.")
    from scapy.contrib.cansocket_python_can import (PythonCANSocket, CANSocket, CAN_FRAME_SIZE, CAN_INV_FILTER)  # noqa: E501 F401

elif LINUX and six.PY3 and not conf.use_pypy:
    log_loading.info("Using native CANSocket.")
    log_loading.info("Specify 'conf.contribs['CANSocket'] = "
                     "{'use-python-can': True}' "
                     "to enable python-can CANSockets.")
    from scapy.contrib.cansocket_native import (NativeCANSocket, CANSocket, CAN_FRAME_SIZE, CAN_INV_FILTER)  # noqa: E501 F401

else:
    log_loading.info("No CAN support available. Install python-can or "
                     "use Linux and python3.")