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Zeke Lu c53390b078 net: store IPv4 returned from cgo resolver as 4-byte slice net.IP 
net.IP states that a 16-byte slice can still be an IPv4 address.
But after netip.Addr is introduced, it requires extra care to keep
it as an IPv4 address when converting it to a netip.Addr using
netip.AddrFromSlice.

To address this issue, let's change the cgo resolver to return
4-byte net.IP for IPv4. The change will save us 12 bytes too.

Please note that the go resolver already return IPv4 as 4-byte
slice.

The test TestResolverLookupIP has been modified to cover this
behavior. So no new test is added.

Fixes #53554.

Change-Id: I0dc2a59ad785c0c67a7bc22433105529f055997f
GitHub-Last-Rev: bd7bb2f17b
GitHub-Pull-Request: golang/go#53638
Reviewed-on: https://go-review.googlesource.com/c/go/+/415580
Auto-Submit: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2022-11-02 18:42:50 +00:00
.github .github: update issue label for pkgsite-removal 2022-09-07 16:00:20 +00:00
api regexp: add ErrLarge error 2022-11-02 18:15:21 +00:00
doc doc/go1.20: go version supports non-executable Go binaries 2022-10-24 15:56:26 +00:00
lib/time lib/time, time/tzdata: update to 2022b 2022-08-11 20:03:19 +00:00
misc cmd/go: don't install most GOROOT .a files in pkg 2022-10-28 23:35:08 +00:00
src net: store IPv4 returned from cgo resolver as 4-byte slice net.IP 2022-11-02 18:42:50 +00:00
test test/bench/go1: eliminate start-up time 2022-11-01 17:07:14 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md
LICENSE
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README.md README.md: update wiki link 2022-04-26 16:21:18 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.