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# Copyright (c) 2019 David Steele <dsteele@gmail.com>
#
# SPDX-License-Identifier: GPL-2.0-or-later
# License-Filename: LICENSE
#
import logging
import os
from pathlib import Path
import signal
import subprocess
import time
from comitup import modemgr
log = logging.getLogger('comitup')
hotspot_config = "/usr/share/comitup/dns/dns-hotspot.conf"
connected_config = "/usr/share/comitup/dns/dns-connected.conf"
pidpath = Path("/var/run/comitup-dns")
callmatrix = {
('HOTSPOT', 'pass', "router"):
(lambda: run_dns, lambda: hotspot_config),
('CONNECTING', 'start', "router"):
(lambda: run_dns, lambda: connected_config),
('HOTSPOT', 'pass', "single"):
(lambda: run_dns, lambda: hotspot_config),
('CONNECTING', 'start', "single"):
(lambda: run_dns, lambda: ""),
}
def kill_dns(ppath, sig):
try:
pid = int(pidpath.read_text().strip())
os.kill(pid, signal.SIGTERM)
os.waitpid(pid, 0)
except (ValueError, ProcessLookupError,
FileNotFoundError, ChildProcessError):
pass
def run_dns(confpath):
log.debug("Running dnsmasq using {}".format(confpath))
kill_dns(pidpath, signal.SIGTERM)
if os.path.exists(confpath):
dev = modemgr.get_ap_device().Interface
cmd = "dnsmasq --conf-file={0} --interface={1}".format(confpath, dev)
for _ in range(5):
cp = subprocess.run(cmd.split())
if cp.returncode == 0:
break
time.sleep(.1)
def state_callback(state, action):
try:
(fn_fact, svc_fact) = callmatrix[(state, action, modemgr.get_mode())]
except KeyError:
return
fn_fact()(svc_fact())
def callback_target():
return state_callback
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