Himanshu Panwar
620f1c1148
Automatic update from web-platform-tests
WebTransport: Add congestionControl hint (W3C spec compliance)
Implement the WebTransportCongestionControl enum, constructor option,
and readonly attribute per the W3C WebTransport spec.
The spec defines congestionControl as a hint for the preferred
congestion control algorithm — an enum {"default", "throughput",
"low-latency"} passed via WebTransportOptions and readable as a readonly
attribute on WebTransport.
Plumbing through all layers:
- Blink: New enum IDL, option, getter, Blink→Mojo conversion
- Mojo IPC: New enum + parameter on Connect() and CreateWebTransport()
- Browser: Thread through throttle/security callback chain
- Network service: Convert Mojo enum → net::CongestionControlHint
- net/QUIC: AdjustSendAlgorithm() maps "throughput" → BBR v2,
"low-latency" → BBR v1, "default" → no change (Cubic)
A global kWebTransportCongestionControl feature flag overrides
per-connection hints for Chrome-wide experiments.
Bug: 501268547
Change-Id: I6d0d7163fdb777058b940d9b9f699ee65c631dfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7743543
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Commit-Queue: Himanshu Panwar <himpanwar@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1620659}
--
wpt-commits: 7cb0bce2608006c5c16961d970248508d1724d5e
wpt-pr: 59463
41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
// META: global=window,worker
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// META: script=resources/webtransport-test-helpers.sub.js
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// META: script=/common/utils.js
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// Tests that a WebTransport session can be established when congestionControl
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// is specified in the constructor, and that the attribute is readable.
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const CONGESTION_CONTROL_VALUES = ["default", "throughput", "low-latency"];
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for (const value of CONGESTION_CONTROL_VALUES) {
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promise_test(async t => {
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const id = token();
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const wt = new WebTransport(
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webtransport_url(`client-close.py?token=${id}`),
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{congestionControl: value});
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await wt.ready;
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// The congestionControl attribute should be readable after connection.
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// The spec says if the UA doesn't support the requested algorithm, it
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// falls back to "default". So the value is either what was requested or
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// "default".
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assert_in_array(wt.congestionControl, [value, "default"],
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'congestionControl should be the requested value or "default"');
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wt.close();
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}, `WebTransport session established with congestionControl "${value}" and attribute is readable`);
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}
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promise_test(async t => {
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const id = token();
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const wt = new WebTransport(
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webtransport_url(`client-close.py?token=${id}`));
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await wt.ready;
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// When no congestionControl is specified, the default should be used.
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assert_equals(wt.congestionControl, "default",
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'congestionControl should default to "default"');
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wt.close();
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}, 'WebTransport session without congestionControl option defaults to "default"');
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