net: net.ParseIP always return ipv6 #65131
Description
Go version
go version go1.21.3 windows/amd64
Output of go env in your module/workspace:
set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\lys\AppData\Local\go-build
set GOENV=C:\Users\lys\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=D:\gopath\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=D:\gopath
set GOPRIVATE=
set GOPROXY=https://goproxy.io,direct
set GOROOT=D:\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=D:\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.21.3
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=0
set GOMOD=NUL
set GOWORK=
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set PKG_CONFIG=pkg-configWhat did you do?
import (
"fmt"
"net"
"net/netip"
)
func main() {
ip1 := net.ParseIP("127.0.0.1")
fmt.Println([]byte(ip1))
nip1, _ := netip.AddrFromSlice(ip1)
fmt.Println(nip1.Is4())
conn, _ := net.DialUDP("udp", nil, &net.UDPAddr{IP: net.ParseIP("8.8.8.8"), Port: 53})
ip2 := (conn.LocalAddr().(*net.UDPAddr)).IP
fmt.Println([]byte(ip2))
}What did you see happen?
[0 0 0 0 0 0 0 0 0 0 255 255 127 0 0 1]
false
[192 168 0 111]
What did you expect to see?
[127 0 0 1]
false
[192 168 0 111]