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net/netip: fix formatting of IPv4-in-6 address with zone

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Weird, but don't drop the zone when stringifying.

Fixes #50111

Change-Id: I5fbccdfedcdc77a77ee6bafc8d82b8ec8ec7220c
Reviewed-on: https://go-review.googlesource.com/c/go/+/371094
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Trust: Matt Layher <mdlayher@gmail.com>
Trust: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Brad Fitzpatrick 2021-12-11 16:17:46 -08:00
parent 766f89b5c6
commit 1c1998ea08
2 changed files with 24 additions and 3 deletions
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21
src/net/netip/netip.go
View File

@ -769,7 +769,11 @@ func (ip Addr) String() string {
default:
if ip.Is4In6() {
// TODO(bradfitz): this could alloc less.
return "::ffff:" + ip.Unmap().String()
if z := ip.Zone(); z != "" {
return "::ffff:" + ip.Unmap().String() + "%" + z
} else {
return "::ffff:" + ip.Unmap().String()
}
}
return ip.string6()
}
@ -787,7 +791,12 @@ func (ip Addr) AppendTo(b []byte) []byte {
default:
if ip.Is4In6() {
b = append(b, "::ffff:"...)
return ip.Unmap().appendTo4(b)
b = ip.Unmap().appendTo4(b)
if z := ip.Zone(); z != "" {
b = append(b, '%')
b = append(b, z...)
}
return b
}
return ip.appendTo6(b)
}
@ -947,10 +956,16 @@ func (ip Addr) MarshalText() ([]byte, error) {
b := make([]byte, 0, max)
if ip.Is4In6() {
b = append(b, "::ffff:"...)
return ip.Unmap().appendTo4(b), nil
b = ip.Unmap().appendTo4(b)
if z := ip.Zone(); z != "" {
b = append(b, '%')
b = append(b, z...)
}
return b, nil
}
return ip.appendTo6(b), nil
}
}
// UnmarshalText implements the encoding.TextUnmarshaler interface.

6
src/net/netip/netip_test.go
View File

@ -114,6 +114,12 @@ func TestParseAddr(t *testing.T) {
ip: MkAddr(Mk128(0x0001000200000000, 0x0000ffffc0a88cff), intern.Get("eth1")),
str: "1:2::ffff:c0a8:8cff%eth1",
},
// 4-in-6 with zone
{
in: "::ffff:192.168.140.255%eth1",
ip: MkAddr(Mk128(0, 0x0000ffffc0a88cff), intern.Get("eth1")),
str: "::ffff:192.168.140.255%eth1",
},
// IPv6 with capital letters.
{
in: "FD9E:1A04:F01D::1",