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review.blissroms.org / platform_packages_modules_DnsResolver / 52cf009bf98d4575e67f96a732f1b715dc588d13
commit52cf009bf98d4575e67f96a732f1b715dc588d13[log] [tgz]
authorchenbruce <chenbruce@google.com>Wed Aug 18 22:24:56 2021 +0800
committerchenbruce <chenbruce@google.com>Wed Aug 25 14:54:01 2021 +0800
treecfe26d359a638f4504c76ab541fc5c5a4081dd52
parent9b72daa3b7f3f33fcc5bf25269a9221cf296e904 [diff]
Subsampling DNS event for mDNS

Currently, a device generates some mDNS queries when the user uses
mDNS .local resolution.
Using the query info by subsampling events based on how interesting
they are. Because the number of mDNS query is much less than DNS
query, the mDNS subsampling rate is higer than DNS query.
- if return_code == 0,2,7 -> log 1 in 1 event
- if return_code == default -> log 1 in 1 event
Also allow to use experiment flag to update sub-sampling denom.

Example for dumpsys dnsresolver:
  NetId: 100
    DnsEvent subsampling map for MDNS: default:1

Bug: 197092658
Test: cd packages/modules/DnsResolver && atest
      m statsd_testdrive and run "statsd_testdrive 116"
Change-Id: I76073aa9a1cea43bda2675334592ed22e96a238e
5 files changed
tree: cfe26d359a638f4504c76ab541fc5c5a4081dd52
  1. aidl_api/
  2. apex/
  3. binder/
  4. include/
  5. tests/
  6. .clang-format ⇨ ../../../build/soong/scripts/system-clang-format
  7. rustfmt.toml ⇨ ../../../build/soong/scripts/rustfmt.toml
  8. .editorconfig
  9. Android.bp
  10. cbindgen.toml
  11. Dns64Configuration.cpp
  12. Dns64Configuration.h
  13. DnsProxyListener.cpp
  14. DnsProxyListener.h
  15. DnsQueryLog.cpp
  16. DnsQueryLog.h
  17. DnsQueryLogTest.cpp
  18. DnsResolver.cpp
  19. DnsResolver.h
  20. DnsResolverService.cpp
  21. DnsResolverService.h
  22. DnsStats.cpp
  23. DnsStats.h
  24. DnsStatsTest.cpp
  25. DnsTlsDispatcher.cpp
  26. DnsTlsDispatcher.h
  27. DnsTlsQueryMap.cpp
  28. DnsTlsQueryMap.h
  29. DnsTlsServer.cpp
  30. DnsTlsServer.h
  31. DnsTlsSessionCache.cpp
  32. DnsTlsSessionCache.h
  33. DnsTlsSocket.cpp
  34. DnsTlsSocket.h
  35. DnsTlsSocketFactory.h
  36. DnsTlsTransport.cpp
  37. DnsTlsTransport.h
  38. doh.h
  39. doh.rs
  40. Experiments.cpp
  41. Experiments.h
  42. ExperimentsTest.cpp
  43. getaddrinfo.cpp
  44. getaddrinfo.h
  45. gethnamaddr.cpp
  46. gethnamaddr.h
  47. hostent.h
  48. IDnsTlsSocket.h
  49. IDnsTlsSocketFactory.h
  50. IDnsTlsSocketObserver.h
  51. IPrivateDnsServer.h
  52. libnetd_resolv.map.txt
  53. LockedQueue.h
  54. NOTICE
  55. OperationLimiter.h
  56. OperationLimiterTest.cpp
  57. OWNERS
  58. params.h
  59. PREUPLOAD.cfg
  60. PrivateDnsCommon.h
  61. PrivateDnsConfiguration.cpp
  62. PrivateDnsConfiguration.h
  63. PrivateDnsConfigurationTest.cpp
  64. PrivateDnsValidationObserver.h
  65. README-DoT.md
  66. README.md
  67. res_cache.cpp
  68. res_comp.cpp
  69. res_comp.h
  70. res_debug.cpp
  71. res_debug.h
  72. res_mkquery.cpp
  73. res_query.cpp
  74. res_send.cpp
  75. res_send.h
  76. res_stats.cpp
  77. resolv_cache.h
  78. resolv_private.h
  79. resolv_rust_test_config_template.xml
  80. resolv_test_config_template.xml
  81. ResolverController.cpp
  82. ResolverController.h
  83. ResolverEventReporter.cpp
  84. ResolverEventReporter.h
  85. ResolverStats.h
  86. sethostent.cpp
  87. stats.h
  88. stats.proto
  89. TEST_MAPPING
  90. util.cpp
  91. 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.