Surface ICE candidates that match an updated candidate filter.

After this change an ICE agent can surface candidates that do not match
the previous filter but are allowed by the updated one. The candidate
filter, as part of the internal implementation in the ICE transport,
manifests the RTCIceTransportPolicy field in RTCConfiguration.

This new feature would allow an ICE agent to gather new candidates when
the transport policy changes from e.g. 'relay' to 'all' without an ICE
restart.

A caveat in the current implementation remains, and a candidate can
surface multiple times if the transport policy, or the candidate filter
directly, performs multiple transitions from a value that disallows to
one that allows the underlying candidate type. For example, if the
transport policy is updated by 'all' -> 'relay' -> 'all', the same host
candidate can surface after the second update.


Bug: webrtc:8939
Change-Id: I92c2e07dafab225c702c5de28f47958a0d3270cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/132282
Commit-Queue: Qingsi Wang <qingsi@webrtc.org>
Reviewed-by: Jeroen de Borst <jeroendb@webrtc.org>
Reviewed-by: Seth Hampson <shampson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27674}
11 files changed
tree: af06089a2218e5d5fa8bddd617f4fd111da91c7f
  1. .clang-format
  2. .git-blame-ignore-revs
  3. .gitignore
  4. .gn
  5. .vpython
  6. AUTHORS
  7. BUILD.gn
  8. CODE_OF_CONDUCT.md
  9. DEPS
  10. ENG_REVIEW_OWNERS
  11. LICENSE
  12. OWNERS
  13. PATENTS
  14. PRESUBMIT.py
  15. README.chromium
  16. README.md
  17. WATCHLISTS
  18. abseil-in-webrtc.md
  19. api/
  20. audio/
  21. build_overrides/
  22. call/
  23. codereview.settings
  24. common_audio/
  25. common_types.h
  26. common_video/
  27. crypto/
  28. data/
  29. examples/
  30. license_template.txt
  31. logging/
  32. media/
  33. modules/
  34. native-api.md
  35. p2p/
  36. pc/
  37. presubmit_test.py
  38. presubmit_test_mocks.py
  39. pylintrc
  40. resources/
  41. rtc_base/
  42. rtc_tools/
  43. sdk/
  44. stats/
  45. style-guide.md
  46. style-guide/
  47. system_wrappers/
  48. test/
  49. tools_webrtc/
  50. video/
  51. webrtc.gni
  52. whitespace.txt
README.md

WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.

Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.

The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others.

Development

See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.

Authoritative list of directories that contain the native API header files.

More info