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review.blissroms.org / platform_packages_modules_DnsResolver / 939e3690aeb0142679678313a74bf024cfba7129
commit939e3690aeb0142679678313a74bf024cfba7129[log] [tgz]
authorMike Yu <yumike@google.com>Tue Oct 29 17:28:34 2019 +0800
committerMike Yu <yumike@google.com>Wed Dec 11 22:29:36 2019 +0800
tree4ff8fcdfff1094edc150c0f5b7cb93d3a252ea25
parentcbc280acb9d1fbaeb7754418fd4560370c3cb7e0 [diff]
Log DNS resolved answers

Introduce a thread-safe queue, DnsQueryLog, to log the DNS resolved answers
which are not found in the cache. The sensitive data is masked in order
not to reveal privacy information. The log can be shown only by
"dumpsys dnsresolver querylog", and it can show only the most-recent-one-hour
queries.

Example output:
DNS query log (last 60 minutes):
  time=17:27:09.262 netId=100 uid=10107 pid=3322 hostname=w*** answer=[2404:***, 216.***] (33ms)
  time=17:27:14.303 netId=100 uid=10097 pid=3363 hostname=w*** answer=[13.***] (21ms)

Bug: 139040977
Test: cd packages/modules/DnsResolver && atest
Test: "adb shell dumpsys dnsresolver querylog" passed
Change-Id: I8d063f4ac920f41c4fbc77e60a3e3a919d9daa62
6 files changed
tree: 4ff8fcdfff1094edc150c0f5b7cb93d3a252ea25
  1. aidl_api/
  2. apex/
  3. binder/
  4. include/
  5. tests/
  6. .clang-format ⇨ ../../../build/soong/scripts/system-clang-format
  7. .editorconfig
  8. Android.bp
  9. Dns64Configuration.cpp
  10. Dns64Configuration.h
  11. DnsProxyListener.cpp
  12. DnsProxyListener.h
  13. DnsQueryLog.cpp
  14. DnsQueryLog.h
  15. DnsResolver.cpp
  16. DnsResolver.h
  17. DnsResolverService.cpp
  18. DnsResolverService.h
  19. DnsStats.cpp
  20. DnsStats.h
  21. DnsStatsTest.cpp
  22. DnsTlsDispatcher.cpp
  23. DnsTlsDispatcher.h
  24. DnsTlsQueryMap.cpp
  25. DnsTlsQueryMap.h
  26. DnsTlsServer.cpp
  27. DnsTlsServer.h
  28. DnsTlsSessionCache.cpp
  29. DnsTlsSessionCache.h
  30. DnsTlsSocket.cpp
  31. DnsTlsSocket.h
  32. DnsTlsSocketFactory.h
  33. DnsTlsTransport.cpp
  34. DnsTlsTransport.h
  35. getaddrinfo.cpp
  36. getaddrinfo.h
  37. gethnamaddr.cpp
  38. gethnamaddr.h
  39. hostent.h
  40. IDnsTlsSocket.h
  41. IDnsTlsSocketFactory.h
  42. IDnsTlsSocketObserver.h
  43. libnetd_resolv.map.txt
  44. LockedQueue.h
  45. NOTICE
  46. OWNERS
  47. params.h
  48. PREUPLOAD.cfg
  49. PrivateDnsConfiguration.cpp
  50. PrivateDnsConfiguration.h
  51. README-DoT.md
  52. README.md
  53. res_cache.cpp
  54. res_comp.cpp
  55. res_debug.cpp
  56. res_debug.h
  57. res_init.cpp
  58. res_init.h
  59. res_mkquery.cpp
  60. res_query.cpp
  61. res_send.cpp
  62. res_send.h
  63. res_stats.cpp
  64. resolv_cache.h
  65. resolv_cache_unit_test.cpp
  66. resolv_callback_unit_test.cpp
  67. resolv_private.h
  68. resolv_tls_unit_test.cpp
  69. resolv_unit_test.cpp
  70. ResolverController.cpp
  71. ResolverController.h
  72. ResolverEventReporter.cpp
  73. ResolverEventReporter.h
  74. ResolverStats.h
  75. sethostent.cpp
  76. stats.h
  77. stats.proto
  78. TEST_MAPPING
  79. util.cpp
  80. util.h
README.md

Logging

This code uses LOG(X) for logging. Log levels are VERBOSE,DEBUG,INFO,WARNING and ERROR. The default setting is WARNING and logs relate to WARNING and ERROR will be shown. If you want to enable the DEBUG level logs, using following command. adb shell service call dnsresolver 10 i32 1 VERBOSE 0 DEBUG 1 INFO 2 WARNING 3 ERROR 4 Verbose resolver logs could contain PII -- do NOT enable in production builds.