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quic: buffer stalls, as maxdata updates do not triggern an update of writeDesired sizes

nodejs/node#64835·122028·JavaScript·38 天未动·2 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

ngtcp2 has no callback to inform us about an arrived maxdata frame. If the buffering is only external and not within ngtcp2, this can cause a stall. The equivalent for maxstreamdata is already addressed in https://github.com/nodejs/node/pull/64768 , as here ngtcp2 provides a callback. Here is a reproduction code, based on the test of @pimterry for the PR of maxstreamdata: ``` // Flags: --experimental-quic --experimental-stream-iter --no-warnings // Test: Quic maxdata updates on http/3 // Client sends a body that precisely fills the session window size, // and verifies that it is data transfer is not stalled. import { hasQuic, skip } from '../common/index.mjs'; import { readFile } from 'node:fs/promises'; import { setTimeout as sleep } from 'node:timers/promises'; if (!hasQuic) { skip('QUIC is not enabled'); } const { listen, connect } = await import('node:quic'); const { createPrivateKey } = await import('node:crypto'); const { drainableProtocol } = await import('stream/iter'); const keys = 'test/fixtures/keys'; const key = createPrivateKey(await readFile(`${keys}/agent1-key.pem`)); const cert = await readFile(`${keys}/agent1-cert.pem`); const WINDOW = 4096; // Fills the window exactly: // considers all framing including some initial session capsules const BODY = WINDOW - 38; let letServerRead; const serverMayRead = new Promise((resolve) => { letServerRead = resolve; }); const endpoint = await listen((session) => { session.onstream = async (stream) => { await serverMayRead; // eslint-disable-next-line no-unused-vars for await (const _ of stream) { /* reading extends the window */ } }; }, { sni: { '*': { keys: [key], certs: [cert] } }, transportParams: { initialMaxStreamDataBidiRemote: 1024 * 1024, // make sure maxstreamdata does not block initialMaxData: WINDOW, }, onheaders() { this.sendHeaders({ ':status': '200' }); }, }); const session = await connect(endpoint.address, { servername: 'localhost', verifyPeer: 'manual', }); a…
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