microsoft/msquic

Support Async DNS Resolution

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#1,304 opened on Mar 1, 2021

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Description

Describe the feature you'd like supported

Currently we call synchronous DNS resolution APIs (GetAddrInfo) on our QUIC worker threads. Most of the time this is quick and there isn't any noticed perf issue; but it is entirely possible for these APIs to take a long time.

Proposed solution

We should use async version where possible (GetAddrInfoEx). This will likely require changes at the PAL. I'm not sure what (if any) built-in APIs are available for Posix.

Contributor guide

Research direction
Investigate async DNS resolution APIs for both Windows (GetAddrInfoEx) and POSIX systems. Look into the PAL (Platform Abstraction Layer) in msquic and how synchronous DNS calls are currently made. Propose a design to replace synchronous calls with async versions, ensuring thread safety and minimal performance impact.
Tech stack
c
Domain
backendnetworking
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
CNetworking concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30