net: correct address when listening on IPv4zero tcp4/udp4 on Plan 9
Since Plan 9 doesn't allow us to listen on 0.0.0.0, the Listener
address that's read in from /net is the IPv6 address ::. Convert
this address to 0.0.0.0 when the network is tcp4 or udp4.
Fixes #40045
Change-Id: Icfb69b823e5b80603742d23c3762a812996fe43f
Reviewed-on: https://go-review.googlesource.com/c/go/+/240918
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David du Colombier <0intro@gmail.com>
diff --git a/src/net/ipsock_plan9.go b/src/net/ipsock_plan9.go
index 9db01b0..99d3e39 100644
--- a/src/net/ipsock_plan9.go
+++ b/src/net/ipsock_plan9.go
@@ -67,7 +67,7 @@
return addr, p, nil
}
-func readPlan9Addr(proto, filename string) (addr Addr, err error) {
+func readPlan9Addr(net, filename string) (addr Addr, err error) {
var buf [128]byte
f, err := os.Open(filename)
@@ -83,13 +83,19 @@
if err != nil {
return
}
- switch proto {
- case "tcp":
+ switch net {
+ case "tcp4", "udp4":
+ if ip.Equal(IPv6zero) {
+ ip = ip[:IPv4len]
+ }
+ }
+ switch net {
+ case "tcp", "tcp4", "tcp6":
addr = &TCPAddr{IP: ip, Port: port}
- case "udp":
+ case "udp", "udp4", "udp6":
addr = &UDPAddr{IP: ip, Port: port}
default:
- return nil, UnknownNetworkError(proto)
+ return nil, UnknownNetworkError(net)
}
return addr, nil
}
@@ -213,7 +219,7 @@
f.Close()
return nil, err
}
- laddr, err = readPlan9Addr(proto, netdir+"/"+proto+"/"+name+"/local")
+ laddr, err = readPlan9Addr(net, netdir+"/"+proto+"/"+name+"/local")
if err != nil {
data.Close()
f.Close()
@@ -233,7 +239,7 @@
f.Close()
return nil, &OpError{Op: "announce", Net: net, Source: laddr, Addr: nil, Err: err}
}
- laddr, err = readPlan9Addr(proto, netdir+"/"+proto+"/"+name+"/local")
+ laddr, err = readPlan9Addr(net, netdir+"/"+proto+"/"+name+"/local")
if err != nil {
f.Close()
return nil, err
diff --git a/src/net/ipsock_plan9_test.go b/src/net/ipsock_plan9_test.go
new file mode 100644
index 0000000..e5fb9ff
--- /dev/null
+++ b/src/net/ipsock_plan9_test.go
@@ -0,0 +1,29 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import "testing"
+
+func TestTCP4ListenZero(t *testing.T) {
+ l, err := Listen("tcp4", "0.0.0.0:0")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ if a := l.Addr(); isNotIPv4(a) {
+ t.Errorf("address does not contain IPv4: %v", a)
+ }
+}
+
+func TestUDP4ListenZero(t *testing.T) {
+ c, err := ListenPacket("udp4", "0.0.0.0:0")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ if a := c.LocalAddr(); isNotIPv4(a) {
+ t.Errorf("address does not contain IPv4: %v", a)
+ }
+}