Enable mDNS .local resolution

This change implements "5.1 One-Shot multicast DNS Queries"
in RFC 6762 to send standard DNS queries blindly to 224.0.0.251:5353
or [FF02::FB]:5353. mDNS resolution is transparently supported by
calling getaddrinfo() with a hostname ending in "*.local". If the
device exists, getaddrinfo() returns the local addresses. Otherwise,
the query will timeout and return NODATA. This feature doesn't support
reverse-lookups with getnameinfo().

Bug: 140857615
Test: cd packages/modules/DnsResolver && atest
Change-Id: Ie65f220de8c6e5c6e21403ec1f717cf6929023a6
5 files changed
tree: 441e49910a5707ee4a7b0b2f8cc0aba58dfa93d8
  1. aidl_api/
  2. apex/
  3. binder/
  4. include/
  5. tests/
  6. .editorconfig
  7. Android.bp
  8. cbindgen.toml
  9. Dns64Configuration.cpp
  10. Dns64Configuration.h
  11. DnsProxyListener.cpp
  12. DnsProxyListener.h
  13. DnsQueryLog.cpp
  14. DnsQueryLog.h
  15. DnsQueryLogTest.cpp
  16. DnsResolver.cpp
  17. DnsResolver.h
  18. DnsResolverService.cpp
  19. DnsResolverService.h
  20. DnsStats.cpp
  21. DnsStats.h
  22. DnsStatsTest.cpp
  23. DnsTlsDispatcher.cpp
  24. DnsTlsDispatcher.h
  25. DnsTlsQueryMap.cpp
  26. DnsTlsQueryMap.h
  27. DnsTlsServer.cpp
  28. DnsTlsServer.h
  29. DnsTlsSessionCache.cpp
  30. DnsTlsSessionCache.h
  31. DnsTlsSocket.cpp
  32. DnsTlsSocket.h
  33. DnsTlsSocketFactory.h
  34. DnsTlsTransport.cpp
  35. DnsTlsTransport.h
  36. doh.h
  37. doh.rs
  38. Experiments.cpp
  39. Experiments.h
  40. ExperimentsTest.cpp
  41. getaddrinfo.cpp
  42. getaddrinfo.h
  43. gethnamaddr.cpp
  44. gethnamaddr.h
  45. hostent.h
  46. IDnsTlsSocket.h
  47. IDnsTlsSocketFactory.h
  48. IDnsTlsSocketObserver.h
  49. IPrivateDnsServer.h
  50. libnetd_resolv.map.txt
  51. LockedQueue.h
  52. NOTICE
  53. OperationLimiter.h
  54. OperationLimiterTest.cpp
  55. OWNERS
  56. params.h
  57. PREUPLOAD.cfg
  58. PrivateDnsCommon.h
  59. PrivateDnsConfiguration.cpp
  60. PrivateDnsConfiguration.h
  61. PrivateDnsConfigurationTest.cpp
  62. PrivateDnsValidationObserver.h
  63. README-DoT.md
  64. README.md
  65. res_cache.cpp
  66. res_comp.cpp
  67. res_comp.h
  68. res_debug.cpp
  69. res_debug.h
  70. res_mkquery.cpp
  71. res_query.cpp
  72. res_send.cpp
  73. res_send.h
  74. res_stats.cpp
  75. resolv_cache.h
  76. resolv_private.h
  77. resolv_rust_test_config_template.xml
  78. resolv_test_config_template.xml
  79. ResolverController.cpp
  80. ResolverController.h
  81. ResolverEventReporter.cpp
  82. ResolverEventReporter.h
  83. ResolverStats.h
  84. sethostent.cpp
  85. stats.h
  86. stats.proto
  87. TEST_MAPPING
  88. util.cpp
  89. 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.