| 314 | } |
| 315 | |
| 316 | func initSystemdResolvedMonitor() { |
| 317 | resolvMonitor, err := systemd.NewResolvedMonitor() |
| 318 | if err != nil { |
| 319 | log.Debug("[DNS] Unable to use systemd-resolved monitor: %s", err) |
| 320 | return |
| 321 | } |
| 322 | _, err = resolvMonitor.Connect() |
| 323 | if err != nil { |
| 324 | log.Debug("[DNS] Connecting to systemd-resolved: %s", err) |
| 325 | return |
| 326 | } |
| 327 | err = resolvMonitor.Subscribe() |
| 328 | if err != nil { |
| 329 | log.Debug("[DNS] Subscribing to systemd-resolved DNS events: %s", err) |
| 330 | return |
| 331 | } |
| 332 | go func() { |
| 333 | var ip net.IP |
| 334 | for { |
| 335 | select { |
| 336 | case exit := <-resolvMonitor.Exit(): |
| 337 | if exit == nil { |
| 338 | log.Info("[DNS] systemd-resolved monitor stopped") |
| 339 | return |
| 340 | } |
| 341 | log.Debug("[DNS] systemd-resolved monitor disconnected. Reconnecting...") |
| 342 | case response := <-resolvMonitor.GetDNSResponses(): |
| 343 | if response.State != systemd.SuccessState { |
| 344 | log.Debug("[DNS] systemd-resolved monitor response error: %v", response) |
| 345 | continue |
| 346 | } |
| 347 | /*for i, q := range response.Question { |
| 348 | log.Trace("[DNS] %d systemd response, question: %s", i, q.Name) |
| 349 | }*/ |
| 350 | for i, a := range response.Answer { |
| 351 | if a.RR.Key.Type != systemd.DNSTypeA && |
| 352 | a.RR.Key.Type != systemd.DNSTypeAAAA && |
| 353 | a.RR.Key.Type != systemd.DNSTypeCNAME { |
| 354 | log.Trace("systemd-resolved, excluding answer: %#v", a) |
| 355 | continue |
| 356 | } |
| 357 | if a.RR.Key.Type == systemd.DNSTypeCNAME { |
| 358 | log.Debug("systemd-resolved CNAME >> %s -> %s", a.RR.Name, a.RR.Key.Name) |
| 359 | dns.Track(a.RR.Name, a.RR.Key.Name /*domain*/) |
| 360 | } else { |
| 361 | ip = net.IP(a.RR.Address) |
| 362 | log.Debug("%d systemd-resolved monitor response: %s -> %s", i, a.RR.Key.Name, ip) |
| 363 | dns.Track(ip.String(), a.RR.Key.Name /*domain*/) |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | } |
| 368 | }() |
| 369 | } |
| 370 | |
| 371 | func doCleanup(queue, repeatQueue *netfilter.Queue) { |
| 372 | log.Info("Cleaning up ...") |