dcsctp: Fix not using iteraters after NackItem

OutstandingData::NackItem nacks a chunk, and if that chunk reaches its
partial reliability critera, it will abandon the entire message. If that
message hasn't been sent in full, a placeholder "end" message is
inserted (see https://crbug.com/webrtc/12812). And when the message is
inserted, any iterators may be invalidated (if e.g. std::deque would
want to grow the deque).

So ensure that there are no iterators used after having called NackItem.
By changing the interface of NackItem, and not passing an Item, but just
the TSN, this is encouraged. NackAll was rewritten as a two-pass
algorithm to first collect TSNs, then iterating that list, looking up
the items in the second pass (constant complexity).

Bug: chromium:1510364
Change-Id: I5156b6d6a683184f290e71c98f16bc68ea2a562f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/331320
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41374}
2 files changed
tree: db1691a8fab1928c0f2ee1f793a4f3a278060fc6
  1. api/
  2. audio/
  3. build_overrides/
  4. call/
  5. common_audio/
  6. common_video/
  7. data/
  8. docs/
  9. examples/
  10. experiments/
  11. g3doc/
  12. infra/
  13. logging/
  14. media/
  15. modules/
  16. net/
  17. p2p/
  18. pc/
  19. resources/
  20. rtc_base/
  21. rtc_tools/
  22. sdk/
  23. stats/
  24. system_wrappers/
  25. test/
  26. tools_webrtc/
  27. video/
  28. .clang-format
  29. .git-blame-ignore-revs
  30. .gitignore
  31. .gn
  32. .mailmap
  33. .style.yapf
  34. .vpython
  35. .vpython3
  36. AUTHORS
  37. BUILD.gn
  38. CODE_OF_CONDUCT.md
  39. codereview.settings
  40. DEPS
  41. DIR_METADATA
  42. ENG_REVIEW_OWNERS
  43. LICENSE
  44. license_template.txt
  45. native-api.md
  46. OWNERS
  47. OWNERS_INFRA
  48. PATENTS
  49. PRESUBMIT.py
  50. presubmit_test.py
  51. presubmit_test_mocks.py
  52. pylintrc
  53. pylintrc_old_style
  54. README.chromium
  55. README.md
  56. WATCHLISTS
  57. webrtc.gni
  58. webrtc_lib_link_test.cc
  59. 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 here 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