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a8b1843b | 1 | #!/usr/bin/python3 |
0fbd7c3c MT |
2 | ############################################################################### |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2016 Michael Tremer # | |
6 | # # | |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
21 | ||
22 | import argparse | |
23 | import datetime | |
24 | import daemon | |
74a5ab67 | 25 | import ipaddress |
0fbd7c3c MT |
26 | import logging |
27 | import logging.handlers | |
b666975e | 28 | import os |
0fbd7c3c MT |
29 | import re |
30 | import signal | |
7be4822f | 31 | import stat |
0fbd7c3c | 32 | import subprocess |
29a36036 | 33 | import sys |
b666975e | 34 | import tempfile |
6d6e7949 | 35 | import time |
0fbd7c3c MT |
36 | |
37 | import inotify.adapters | |
38 | ||
077ea717 MT |
39 | LOCAL_TTL = 60 |
40 | ||
29a36036 MT |
41 | log = logging.getLogger("dhcp") |
42 | log.setLevel(logging.DEBUG) | |
43 | ||
44 | def setup_logging(daemon=True, loglevel=logging.INFO): | |
0fbd7c3c MT |
45 | log.setLevel(loglevel) |
46 | ||
29a36036 | 47 | # Log to syslog by default |
0fbd7c3c | 48 | handler = logging.handlers.SysLogHandler(address="/dev/log", facility="daemon") |
29a36036 | 49 | log.addHandler(handler) |
0fbd7c3c | 50 | |
29a36036 | 51 | # Format everything |
0fbd7c3c MT |
52 | formatter = logging.Formatter("%(name)s[%(process)d]: %(message)s") |
53 | handler.setFormatter(formatter) | |
54 | ||
29a36036 | 55 | handler.setLevel(loglevel) |
0fbd7c3c | 56 | |
29a36036 MT |
57 | # If we are running in foreground, we should write everything to the console, too |
58 | if not daemon: | |
59 | handler = logging.StreamHandler() | |
60 | log.addHandler(handler) | |
0fbd7c3c | 61 | |
29a36036 MT |
62 | handler.setLevel(loglevel) |
63 | ||
64 | return log | |
0fbd7c3c | 65 | |
e22bcd38 MT |
66 | def ip_address_to_reverse_pointer(address): |
67 | parts = address.split(".") | |
68 | parts.reverse() | |
69 | ||
70 | return "%s.in-addr.arpa" % ".".join(parts) | |
71 | ||
72 | def reverse_pointer_to_ip_address(rr): | |
73 | parts = rr.split(".") | |
74 | ||
75 | # Only take IP address part | |
76 | parts = reversed(parts[0:4]) | |
77 | ||
78 | return ".".join(parts) | |
79 | ||
0fbd7c3c | 80 | class UnboundDHCPLeasesBridge(object): |
7354d294 | 81 | def __init__(self, dhcp_leases_file, fix_leases_file, unbound_leases_file, hosts_file): |
0fbd7c3c | 82 | self.leases_file = dhcp_leases_file |
86c9deb2 | 83 | self.fix_leases_file = fix_leases_file |
7354d294 | 84 | self.hosts_file = hosts_file |
0fbd7c3c | 85 | |
6d6e7949 MT |
86 | self.watches = { |
87 | self.leases_file : inotify.constants.IN_MODIFY, | |
88 | self.fix_leases_file : 0, | |
89 | self.hosts_file : 0, | |
90 | } | |
91 | ||
0fbd7c3c MT |
92 | self.unbound = UnboundConfigWriter(unbound_leases_file) |
93 | self.running = False | |
94 | ||
95 | def run(self): | |
96 | log.info("Unbound DHCP Leases Bridge started on %s" % self.leases_file) | |
97 | self.running = True | |
98 | ||
6d6e7949 MT |
99 | i = inotify.adapters.Inotify() |
100 | ||
101 | # Add watches for the directories of every relevant file | |
102 | for f, mask in self.watches.items(): | |
103 | i.add_watch( | |
104 | os.path.dirname(f), | |
105 | mask | inotify.constants.IN_CLOSE_WRITE | inotify.constants.IN_MOVED_TO, | |
106 | ) | |
107 | ||
108 | # Enabled so that we update hosts and leases on startup | |
109 | update_hosts = update_leases = True | |
110 | ||
111 | while self.running: | |
112 | log.debug("Wakeup of main loop") | |
0fbd7c3c | 113 | |
6d6e7949 MT |
114 | # Process the entire inotify queue and identify what we need to do |
115 | for event in i.event_gen(): | |
116 | # Nothing to do | |
117 | if event is None: | |
118 | break | |
0fbd7c3c | 119 | |
6d6e7949 MT |
120 | # Decode the event |
121 | header, type_names, path, filename = event | |
0fbd7c3c | 122 | |
6d6e7949 | 123 | file = os.path.join(path, filename) |
0fbd7c3c | 124 | |
6d6e7949 | 125 | log.debug("inotify event received for %s: %s", file, " ".join(type_names)) |
0fbd7c3c | 126 | |
6d6e7949 MT |
127 | # Did the hosts file change? |
128 | if self.hosts_file == file: | |
129 | update_hosts = True | |
7354d294 | 130 | |
6d6e7949 MT |
131 | # We will need to update the leases on any change |
132 | update_leases = True | |
133 | ||
134 | # Update hosts (if needed) | |
135 | if update_hosts: | |
136 | self.hosts = self.read_static_hosts() | |
137 | ||
138 | # Update leases (if needed) | |
139 | if update_leases: | |
0fbd7c3c MT |
140 | self.update_dhcp_leases() |
141 | ||
6d6e7949 MT |
142 | # Reset |
143 | update_hosts = update_leases = False | |
144 | ||
145 | # Wait a moment before we start the next iteration | |
146 | time.sleep(5) | |
86c9deb2 | 147 | |
0fbd7c3c MT |
148 | log.info("Unbound DHCP Leases Bridge terminated") |
149 | ||
150 | def update_dhcp_leases(self): | |
86c9deb2 MT |
151 | leases = [] |
152 | ||
153 | for lease in DHCPLeases(self.leases_file): | |
5d4f3a42 MT |
154 | # Don't bother with any leases that don't have a hostname |
155 | if not lease.fqdn: | |
156 | continue | |
157 | ||
86c9deb2 MT |
158 | leases.append(lease) |
159 | ||
160 | for lease in FixLeases(self.fix_leases_file): | |
161 | leases.append(lease) | |
0fbd7c3c | 162 | |
c7b83f9b MT |
163 | # Skip any leases that also are a static host |
164 | leases = [l for l in leases if not l.fqdn in self.hosts] | |
165 | ||
166 | # Remove any inactive or expired leases | |
167 | leases = [l for l in leases if l.active and not l.expired] | |
168 | ||
169 | # Dump leases | |
170 | if leases: | |
171 | log.debug("DHCP Leases:") | |
172 | for lease in leases: | |
173 | log.debug(" %s:" % lease.fqdn) | |
174 | log.debug(" State: %s" % lease.binding_state) | |
175 | log.debug(" Start: %s" % lease.time_starts) | |
176 | log.debug(" End : %s" % lease.time_ends) | |
177 | if lease.expired: | |
178 | log.debug(" Expired") | |
179 | ||
0fbd7c3c MT |
180 | self.unbound.update_dhcp_leases(leases) |
181 | ||
7354d294 MT |
182 | def read_static_hosts(self): |
183 | log.info("Reading static hosts from %s" % self.hosts_file) | |
184 | ||
185 | hosts = {} | |
186 | with open(self.hosts_file) as f: | |
187 | for line in f.readlines(): | |
188 | line = line.rstrip() | |
189 | ||
190 | try: | |
4a465756 | 191 | enabled, ipaddr, hostname, domainname, generateptr = line.split(",") |
7354d294 MT |
192 | except: |
193 | log.warning("Could not parse line: %s" % line) | |
194 | continue | |
195 | ||
196 | # Skip any disabled entries | |
197 | if not enabled == "on": | |
198 | continue | |
199 | ||
200 | if hostname and domainname: | |
201 | fqdn = "%s.%s" % (hostname, domainname) | |
202 | elif hostname: | |
203 | fqdn = hostname | |
204 | elif domainname: | |
205 | fqdn = domainname | |
206 | ||
207 | try: | |
208 | hosts[fqdn].append(ipaddr) | |
209 | hosts[fqdn].sort() | |
210 | except KeyError: | |
211 | hosts[fqdn] = [ipaddr,] | |
212 | ||
213 | # Dump everything in the logs | |
214 | log.debug("Static hosts:") | |
96c86cf6 MT |
215 | for name in hosts: |
216 | log.debug(" %-20s : %s" % (name, ", ".join(hosts[name]))) | |
7354d294 MT |
217 | |
218 | return hosts | |
219 | ||
0fbd7c3c MT |
220 | def terminate(self): |
221 | self.running = False | |
222 | ||
223 | ||
224 | class DHCPLeases(object): | |
225 | regex_leaseblock = re.compile(r"lease (?P<ipaddr>\d+\.\d+\.\d+\.\d+) {(?P<config>[\s\S]+?)\n}") | |
226 | ||
227 | def __init__(self, path): | |
228 | self.path = path | |
229 | ||
230 | self._leases = self._parse() | |
231 | ||
232 | def __iter__(self): | |
233 | return iter(self._leases) | |
234 | ||
235 | def _parse(self): | |
86c9deb2 MT |
236 | log.info("Reading DHCP leases from %s" % self.path) |
237 | ||
0fbd7c3c MT |
238 | leases = [] |
239 | ||
240 | with open(self.path) as f: | |
241 | # Read entire leases file | |
242 | data = f.read() | |
243 | ||
244 | for match in self.regex_leaseblock.finditer(data): | |
245 | block = match.groupdict() | |
246 | ||
247 | ipaddr = block.get("ipaddr") | |
248 | config = block.get("config") | |
249 | ||
250 | properties = self._parse_block(config) | |
251 | ||
252 | # Skip any abandoned leases | |
253 | if not "hardware" in properties: | |
254 | continue | |
255 | ||
256 | lease = Lease(ipaddr, properties) | |
257 | ||
258 | # Check if a lease for this Ethernet address already | |
259 | # exists in the list of known leases. If so replace | |
260 | # if with the most recent lease | |
261 | for i, l in enumerate(leases): | |
8b1eb795 | 262 | if l.ipaddr == lease.ipaddr: |
0fbd7c3c MT |
263 | leases[i] = max(lease, l) |
264 | break | |
265 | ||
266 | else: | |
267 | leases.append(lease) | |
268 | ||
269 | return leases | |
270 | ||
271 | def _parse_block(self, block): | |
272 | properties = {} | |
273 | ||
274 | for line in block.splitlines(): | |
275 | if not line: | |
276 | continue | |
277 | ||
278 | # Remove trailing ; from line | |
279 | if line.endswith(";"): | |
280 | line = line[:-1] | |
281 | ||
282 | # Invalid line if it doesn't end with ; | |
283 | else: | |
284 | continue | |
285 | ||
286 | # Remove any leading whitespace | |
287 | line = line.lstrip() | |
288 | ||
289 | # We skip all options and sets | |
290 | if line.startswith("option") or line.startswith("set"): | |
291 | continue | |
292 | ||
293 | # Split by first space | |
294 | key, val = line.split(" ", 1) | |
295 | properties[key] = val | |
296 | ||
297 | return properties | |
298 | ||
299 | ||
86c9deb2 MT |
300 | class FixLeases(object): |
301 | cache = {} | |
302 | ||
303 | def __init__(self, path): | |
304 | self.path = path | |
305 | ||
306 | self._leases = self.cache[self.path] = self._parse() | |
307 | ||
308 | def __iter__(self): | |
309 | return iter(self._leases) | |
310 | ||
311 | def _parse(self): | |
312 | log.info("Reading fix leases from %s" % self.path) | |
313 | ||
314 | leases = [] | |
315 | now = datetime.datetime.utcnow() | |
316 | ||
317 | with open(self.path) as f: | |
318 | for line in f.readlines(): | |
319 | line = line.rstrip() | |
320 | ||
321 | try: | |
322 | hwaddr, ipaddr, enabled, a, b, c, hostname = line.split(",") | |
323 | except ValueError: | |
324 | log.warning("Could not parse line: %s" % line) | |
325 | continue | |
326 | ||
327 | # Skip any disabled leases | |
328 | if not enabled == "on": | |
329 | continue | |
330 | ||
331 | l = Lease(ipaddr, { | |
332 | "binding" : "state active", | |
333 | "client-hostname" : hostname, | |
334 | "hardware" : "ethernet %s" % hwaddr, | |
335 | "starts" : now.strftime("%w %Y/%m/%d %H:%M:%S"), | |
336 | "ends" : "never", | |
337 | }) | |
338 | leases.append(l) | |
339 | ||
340 | # Try finding any deleted leases | |
341 | for lease in self.cache.get(self.path, []): | |
342 | if lease in leases: | |
343 | continue | |
344 | ||
345 | # Free the deleted lease | |
346 | lease.free() | |
347 | leases.append(lease) | |
348 | ||
349 | return leases | |
350 | ||
351 | ||
0fbd7c3c MT |
352 | class Lease(object): |
353 | def __init__(self, ipaddr, properties): | |
354 | self.ipaddr = ipaddr | |
355 | self._properties = properties | |
356 | ||
357 | def __repr__(self): | |
358 | return "<%s %s for %s (%s)>" % (self.__class__.__name__, | |
359 | self.ipaddr, self.hwaddr, self.hostname) | |
360 | ||
361 | def __eq__(self, other): | |
362 | return self.ipaddr == other.ipaddr and self.hwaddr == other.hwaddr | |
363 | ||
364 | def __gt__(self, other): | |
365 | if not self.ipaddr == other.ipaddr: | |
366 | return | |
367 | ||
368 | if not self.hwaddr == other.hwaddr: | |
369 | return | |
370 | ||
371 | return self.time_starts > other.time_starts | |
372 | ||
373 | @property | |
374 | def binding_state(self): | |
375 | state = self._properties.get("binding") | |
376 | ||
377 | if state: | |
378 | state = state.split(" ", 1) | |
379 | return state[1] | |
380 | ||
86c9deb2 MT |
381 | def free(self): |
382 | self._properties.update({ | |
383 | "binding" : "state free", | |
384 | }) | |
385 | ||
0fbd7c3c MT |
386 | @property |
387 | def active(self): | |
388 | return self.binding_state == "active" | |
389 | ||
390 | @property | |
391 | def hwaddr(self): | |
392 | hardware = self._properties.get("hardware") | |
393 | ||
394 | if not hardware: | |
395 | return | |
396 | ||
397 | ethernet, address = hardware.split(" ", 1) | |
398 | ||
399 | return address | |
400 | ||
401 | @property | |
402 | def hostname(self): | |
403 | hostname = self._properties.get("client-hostname") | |
404 | ||
998e880b MT |
405 | if hostname is None: |
406 | return | |
407 | ||
0fbd7c3c | 408 | # Remove any "" |
998e880b | 409 | hostname = hostname.replace("\"", "") |
0fbd7c3c | 410 | |
998e880b MT |
411 | # Only return valid hostnames |
412 | m = re.match(r"^[A-Z0-9\-]{1,63}$", hostname, re.I) | |
413 | if m: | |
414 | return hostname | |
0fbd7c3c MT |
415 | |
416 | @property | |
417 | def domain(self): | |
74a5ab67 MT |
418 | # Load ethernet settings |
419 | ethernet_settings = self.read_settings("/var/ipfire/ethernet/settings") | |
420 | ||
421 | # Load DHCP settings | |
422 | dhcp_settings = self.read_settings("/var/ipfire/dhcp/settings") | |
423 | ||
424 | subnets = {} | |
425 | for zone in ("GREEN", "BLUE"): | |
426 | if not dhcp_settings.get("ENABLE_%s" % zone) == "on": | |
427 | continue | |
428 | ||
429 | netaddr = ethernet_settings.get("%s_NETADDRESS" % zone) | |
430 | submask = ethernet_settings.get("%s_NETMASK" % zone) | |
431 | ||
432 | subnet = ipaddress.ip_network("%s/%s" % (netaddr, submask)) | |
433 | domain = dhcp_settings.get("DOMAIN_NAME_%s" % zone) | |
434 | ||
435 | subnets[subnet] = domain | |
436 | ||
437 | address = ipaddress.ip_address(self.ipaddr) | |
438 | ||
96c86cf6 | 439 | for subnet in subnets: |
74a5ab67 | 440 | if address in subnet: |
96c86cf6 | 441 | return subnets[subnet] |
74a5ab67 MT |
442 | |
443 | # Fall back to localdomain if no match could be found | |
444 | return "localdomain" | |
445 | ||
446 | @staticmethod | |
447 | def read_settings(filename): | |
448 | settings = {} | |
449 | ||
450 | with open(filename) as f: | |
451 | for line in f.readlines(): | |
452 | # Remove line-breaks | |
453 | line = line.rstrip() | |
454 | ||
455 | k, v = line.split("=", 1) | |
456 | settings[k] = v | |
457 | ||
458 | return settings | |
0fbd7c3c MT |
459 | |
460 | @property | |
461 | def fqdn(self): | |
998e880b MT |
462 | if self.hostname: |
463 | return "%s.%s" % (self.hostname, self.domain) | |
0fbd7c3c MT |
464 | |
465 | @staticmethod | |
466 | def _parse_time(s): | |
467 | return datetime.datetime.strptime(s, "%w %Y/%m/%d %H:%M:%S") | |
468 | ||
469 | @property | |
470 | def time_starts(self): | |
471 | starts = self._properties.get("starts") | |
472 | ||
473 | if starts: | |
474 | return self._parse_time(starts) | |
475 | ||
476 | @property | |
477 | def time_ends(self): | |
478 | ends = self._properties.get("ends") | |
479 | ||
480 | if not ends or ends == "never": | |
481 | return | |
482 | ||
483 | return self._parse_time(ends) | |
484 | ||
485 | @property | |
486 | def expired(self): | |
487 | if not self.time_ends: | |
488 | return self.time_starts > datetime.datetime.utcnow() | |
489 | ||
490 | return self.time_starts > datetime.datetime.utcnow() > self.time_ends | |
491 | ||
492 | @property | |
493 | def rrset(self): | |
998e880b MT |
494 | # If the lease does not have a valid FQDN, we cannot create any RRs |
495 | if self.fqdn is None: | |
496 | return [] | |
497 | ||
0fbd7c3c MT |
498 | return [ |
499 | # Forward record | |
b8dd42b9 | 500 | (self.fqdn, "%s" % LOCAL_TTL, "IN A", self.ipaddr), |
0fbd7c3c MT |
501 | |
502 | # Reverse record | |
e22bcd38 MT |
503 | (ip_address_to_reverse_pointer(self.ipaddr), "%s" % LOCAL_TTL, |
504 | "IN PTR", self.fqdn), | |
0fbd7c3c MT |
505 | ] |
506 | ||
507 | ||
508 | class UnboundConfigWriter(object): | |
509 | def __init__(self, path): | |
510 | self.path = path | |
511 | ||
c7b83f9b | 512 | self._cached_leases = [] |
0fbd7c3c MT |
513 | |
514 | def update_dhcp_leases(self, leases): | |
d20ef9d7 MT |
515 | # Find any leases that have expired or do not exist any more |
516 | # but are still in the unbound local data | |
c7b83f9b | 517 | removed_leases = [l for l in self._cached_leases if not l in leases] |
d20ef9d7 | 518 | |
0fbd7c3c | 519 | # Find any leases that have been added |
c7b83f9b | 520 | new_leases = [l for l in leases if l not in self._cached_leases] |
0fbd7c3c MT |
521 | |
522 | # End here if nothing has changed | |
523 | if not new_leases and not removed_leases: | |
524 | return | |
525 | ||
0fbd7c3c MT |
526 | # Write out all leases |
527 | self.write_dhcp_leases(leases) | |
528 | ||
529 | # Update unbound about changes | |
c7b83f9b | 530 | for l in removed_leases: |
3ec5ba50 MT |
531 | try: |
532 | for name, ttl, type, content in l.rrset: | |
533 | log.debug("Removing records for %s" % name) | |
534 | self._control("local_data_remove", name) | |
535 | ||
536 | # If the lease cannot be removed we will try the next one | |
537 | except: | |
538 | continue | |
539 | ||
540 | # If the removal was successful, we will remove it from the cache | |
541 | else: | |
542 | self._cached_leases.remove(l) | |
0fbd7c3c MT |
543 | |
544 | for l in new_leases: | |
3ec5ba50 MT |
545 | try: |
546 | for rr in l.rrset: | |
547 | log.debug("Adding new record %s" % " ".join(rr)) | |
548 | self._control("local_data", *rr) | |
0fbd7c3c | 549 | |
3ec5ba50 MT |
550 | # If the lease cannot be added we will try the next one |
551 | except: | |
552 | continue | |
553 | ||
554 | # Add lease to cache when successfully added | |
555 | else: | |
556 | self._cached_leases.append(l) | |
0fbd7c3c MT |
557 | |
558 | def write_dhcp_leases(self, leases): | |
b666975e MT |
559 | with tempfile.NamedTemporaryFile(mode="w", delete=False) as f: |
560 | filename = f.name | |
561 | ||
0fbd7c3c MT |
562 | for l in leases: |
563 | for rr in l.rrset: | |
564 | f.write("local-data: \"%s\"\n" % " ".join(rr)) | |
565 | ||
7be4822f MT |
566 | # Make file readable for everyone |
567 | os.fchmod(f.fileno(), stat.S_IRUSR|stat.S_IWUSR|stat.S_IRGRP|stat.S_IROTH) | |
568 | ||
b666975e MT |
569 | os.rename(filename, self.path) |
570 | ||
0fbd7c3c | 571 | def _control(self, *args): |
b8dd42b9 | 572 | command = ["unbound-control"] |
0fbd7c3c MT |
573 | command.extend(args) |
574 | ||
575 | try: | |
3ec5ba50 | 576 | subprocess.check_output(command) |
0fbd7c3c MT |
577 | |
578 | # Log any errors | |
579 | except subprocess.CalledProcessError as e: | |
580 | log.critical("Could not run %s, error code: %s: %s" % ( | |
581 | " ".join(command), e.returncode, e.output)) | |
582 | ||
3ec5ba50 MT |
583 | raise |
584 | ||
0fbd7c3c MT |
585 | |
586 | if __name__ == "__main__": | |
587 | parser = argparse.ArgumentParser(description="Bridge for DHCP Leases and Unbound DNS") | |
588 | ||
589 | # Daemon Stuff | |
590 | parser.add_argument("--daemon", "-d", action="store_true", | |
591 | help="Launch as daemon in background") | |
592 | parser.add_argument("--verbose", "-v", action="count", help="Be more verbose") | |
593 | ||
594 | # Paths | |
595 | parser.add_argument("--dhcp-leases", default="/var/state/dhcp/dhcpd.leases", | |
596 | metavar="PATH", help="Path to the DHCPd leases file") | |
597 | parser.add_argument("--unbound-leases", default="/etc/unbound/dhcp-leases.conf", | |
598 | metavar="PATH", help="Path to the unbound configuration file") | |
86c9deb2 MT |
599 | parser.add_argument("--fix-leases", default="/var/ipfire/dhcp/fixleases", |
600 | metavar="PATH", help="Path to the fix leases file") | |
7354d294 MT |
601 | parser.add_argument("--hosts", default="/var/ipfire/main/hosts", |
602 | metavar="PATH", help="Path to static hosts file") | |
0fbd7c3c MT |
603 | |
604 | # Parse command line arguments | |
605 | args = parser.parse_args() | |
606 | ||
607 | # Setup logging | |
83e5f672 MT |
608 | loglevel = logging.WARN |
609 | ||
610 | if args.verbose: | |
611 | if args.verbose == 1: | |
612 | loglevel = logging.INFO | |
613 | elif args.verbose >= 2: | |
614 | loglevel = logging.DEBUG | |
0fbd7c3c | 615 | |
29a36036 | 616 | setup_logging(daemon=args.daemon, loglevel=loglevel) |
0fbd7c3c | 617 | |
7354d294 MT |
618 | bridge = UnboundDHCPLeasesBridge(args.dhcp_leases, args.fix_leases, |
619 | args.unbound_leases, args.hosts) | |
0fbd7c3c | 620 | |
29a36036 | 621 | ctx = daemon.DaemonContext(detach_process=args.daemon, stderr=sys.stderr) |
0fbd7c3c MT |
622 | ctx.signal_map = { |
623 | signal.SIGHUP : bridge.update_dhcp_leases, | |
624 | signal.SIGTERM : bridge.terminate, | |
625 | } | |
626 | ||
627 | with ctx: | |
628 | bridge.run() |