golang/go

x/net/ipv4: wrong endianness in IP header on darwin-amd64

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#32,118 opened on May 17, 2019

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NeedsInvestigationOS-Darwinhelp wanted

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Description

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

What did you do?

marshall IPv4 IP header with x/net/ipv4/header, but I got little-endian instead of big-endian.

What did you expect to see?

Got big-endian IP header len.

What did you see instead?

little-endian

Looking at By looking at the code https://github.com/golang/net/blob/master/ipv4/header.go#L71., for darwin, 32bit/64bit os should have a different conversion. Darwin amd64 is little-endian, it should convert.

Contributor guide

Research direction
Investigate the header marshalling logic in x/net/ipv4/header.go, specifically the conversion for darwin amd64, and check endianness handling in the test suite.
Tech stack
go
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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
Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75