mirror of
https://git.disroot.org/pranav/pybatmesh.git
synced 2025-01-10 00:37:49 +05:30
Pranav Jerry
2e4c3a70a4
This was previously done by the systemd service. But since we allowed changing the name of bat0 and bridge0, we can't expect systemd to still do that job. Commented out some lines in the systemd service and made it send SIGINT instead of the default SIGTERM to kill naxalnet. I accidentally used to increment a2, a3, a4, ... in the __version__ instead of dev1, dev2, &c. a few commits back. Removed some print() lines lurking somewhere in the code. The cleanup is still not completed. We still have to delete the interfaces bridge0 and bat0, or whatever name the user gives it. Just out of boredom, I added some description to some network configuration, though so I doubt if anyone will understand it more because of that.
268 lines
8.8 KiB
Python
268 lines
8.8 KiB
Python
# This file is part of naxalnet.
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# Copyright (C) 2021 The naxalnet Authors
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# This program 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 3 of the License, or
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# (at your option) any later version.
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# This program 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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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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scripts.py
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----------
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The functions in this file is used for reading configs, args
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and doing the things this program is supposed to do.
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This file is named scripts.py because the original developer
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of this program could not think of a better name that suits this file.
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If you want to hack naxalnet, this is the right place to start.
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When run from the commandline, the function main() is called.
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"""
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import sys
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import time
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from pathlib import Path
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from dasbus.error import DBusError
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from systemd.daemon import notify
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from naxalnet import __version__
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from naxalnet.default import REPORT_BUG_INFO, MESH_GLOB, TMP_NET_GLOB
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from naxalnet.log import logger
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from naxalnet.iwd import Adapter, Device, IWD
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from naxalnet.config import args
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from naxalnet.daemon import Daemon
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from naxalnet.network import NetworkD
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# List of wireless devices used as part of the mesh.
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# Used to poweroff devices during cleanup.
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# Though used as a variable, thi e name is
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# capitalised to shut up pylint and co.
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USED_DEVICES = []
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def get_sorted_glob(directory: str, glob: str) -> list:
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"""return sorted list of filenames matching glob"""
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path = Path(directory)
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glob_list = path.glob(glob)
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sorted_list = []
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for i in glob_list:
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# g is a list of PosixPath objects.
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# So we add their absolute path as str.
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sorted_list.append(str(i))
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# sorted_list is not sorted, so we sort them here
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sorted_list.sort()
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return sorted_list
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def any_interface_is_routable():
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"""returns true if any of the interfaces is routable"""
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networkd = NetworkD(runtime_dir=args.networkd_runtime_dir)
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# First, add the temporary configs to networkd.
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for i in get_sorted_glob(args.networkd_config_dir, TMP_NET_GLOB):
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logger.debug("Adding temporary config %s", i)
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networkd.add_config(i)
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# Then, wait for some time to setup the network
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time.sleep(10)
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routable = networkd.is_routable()
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networkd.remove_all_configs()
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return routable
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def setup_mesh(gateway_mode: str = "off"):
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"""
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configure networkd to setup the mesh
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gateway_mode can be client, server, or off
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"""
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try:
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notify("STATUS=Configuring the network...")
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logger.info("Copying network config files")
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networkd = NetworkD(runtime_dir=args.networkd_runtime_dir)
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networkd.set_vars(
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batdev=args.batman_device,
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bridgedev=args.bridge_device,
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gateway_mode=gateway_mode,
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)
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for i in get_sorted_glob(args.networkd_config_dir, MESH_GLOB):
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logger.debug("Adding network config %s", i)
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networkd.add_config(i)
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except PermissionError:
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logger.exception("A PermissionError occured while copying files")
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logger.error(REPORT_BUG_INFO)
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sys.exit(3)
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except:
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logger.exception("An unknown error occured while copying files")
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logger.error(REPORT_BUG_INFO)
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sys.exit(3)
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def setup_devices():
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"""
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Setup wifi interfaces using iwd
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This function should be called every time an interface
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is connected or removed.
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"""
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try:
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notify("STATUS=Setting up mesh...")
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iwd = IWD()
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devices = iwd.get_devices()
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adhoc_devices = []
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ap_devices = []
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global USED_DEVICES
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USED_DEVICES = []
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# Find devices supporting ad-hoc and ap
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for i in devices:
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# For each device, check if its adapter supports
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# ad-hoc or ap. Many adapters will support both,
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# so we will prioritise ad-hoc over ap.
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device = Device(i)
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logger.debug("Found device %s", device.name)
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adapter = Adapter(device.adapter)
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if adapter.supports_mode("ad-hoc"):
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logger.debug("The device %s can be used for ad-hoc", device.name)
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adhoc_devices.append(i)
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if adapter.supports_mode("ap"):
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logger.debug("The device %s can be used for ap", device.name)
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ap_devices.append(i)
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if len(adhoc_devices) != 0:
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# Start ad-hoc on first device supporting ad-hoc
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adhoc_device = Device(adhoc_devices.pop())
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# The same device is likely to have ap support too.
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# But we can't start ad-hoc and ap on the same interface.
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# So we will remove adhoc_device from ap_devices if it exists there
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if adhoc_device.name in ap_devices:
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ap_devices.remove(adhoc_device.name)
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# Turn on adapter if it is off
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# See issue #9
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adhoc_adapter = Adapter(adhoc_device.adapter)
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if not adhoc_adapter.is_powered_on():
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logger.debug("Adapter %s is off. Turning on", adhoc_adapter.name)
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adhoc_adapter.power_on()
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logger.info("Starting mesh on %s", adhoc_device.name)
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adhoc_device.start_adhoc_open(args.adhoc_name)
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USED_DEVICES.append(adhoc_device.name)
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# Start Access point if ap_device is not empty,
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# ie, we have more devices
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if len(ap_devices) != 0:
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ap_device = Device(ap_devices.pop())
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logger.info("Starting WiFi Access Point on %s", ap_device.name)
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logger.info("Use naxalnet --print-wifi to get password")
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# Turn on adapter if it is off
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# See issue #9
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ap_adapter = Adapter(ap_device.adapter)
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if not ap_adapter.is_powered_on():
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logger.debug("Adapter %s is off. Turning on", ap_adapter.name)
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ap_adapter.power_on()
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ap_device.start_ap(args.ap_ssid, args.ap_passwd)
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USED_DEVICES.append(ap_device.name)
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else:
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logger.warning("Not setting up WiFi AP.")
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else:
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logger.warning(
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"No device found to setup mesh. Make sure a WiFi adapter is connected"
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)
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except DBusError:
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logger.exception("Error while communicating with iwd")
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logger.error(REPORT_BUG_INFO)
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sys.exit(4)
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except:
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logger.exception("An unknown error occured while setting up the mesh")
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logger.error(REPORT_BUG_INFO)
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sys.exit(4)
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def cleanup(signal=None, frame=None):
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"""
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Remove all network config, poweroff used wireless devices and
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exit with 0.
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signal and frame are ununsed
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"""
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networkd = NetworkD(runtime_dir=args.networkd_runtime_dir)
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logger.info("Exiting gracefully")
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networkd.remove_all_configs()
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for i in USED_DEVICES:
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device = Device(i)
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device.set_mode("station")
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device.power_off()
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def print_wifi():
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"""
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Prints the name and password of the adhoc, and ap
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from the arguments
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"""
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print("Mesh name:", args.adhoc_name)
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print("SSID:", args.ap_ssid)
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print("Password:", args.ap_passwd)
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def print_version():
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"""Just does what the name suggests"""
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print(__version__)
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def main():
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"""
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This is where the magic happens!
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This function is run every time you
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execute naxalnet from the commandline
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"""
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if args.print_wifi:
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print_wifi()
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sys.exit(0)
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elif args.version:
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print_version()
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sys.exit(0)
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# Notify systemd that naxalnet is ready.
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# see man:sd_notify(3)
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notify("READY=1")
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if args.gateway_mode == "auto":
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logger.info("Checking for internet connection")
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notify("STATUS=Checking for internet")
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# If any interface is routable, set gateway mode to server
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if any_interface_is_routable():
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gateway_mode = "server"
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else:
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gateway_mode = "client"
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logger.info("gateway_mode set to %s", gateway_mode)
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elif args.gateway_mode in ["server", "client", "off"]:
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gateway_mode = args.gateway_mode
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else:
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logger.error("gateway-mode has an illegal value")
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sys.exit(5)
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try:
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setup_devices()
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setup_mesh()
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# Start the daemon so that setup_devices() is called every
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# time a device is connected or removed.
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daemon = Daemon()
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daemon.add_callback(setup_devices)
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notify("STATUS=Waiting for changes")
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daemon.start()
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except KeyboardInterrupt:
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cleanup()
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