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-rw-r--r--src/net/udpsock_plan9_test.go69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/net/udpsock_plan9_test.go b/src/net/udpsock_plan9_test.go
new file mode 100644
index 0000000..3febfcc
--- /dev/null
+++ b/src/net/udpsock_plan9_test.go
@@ -0,0 +1,69 @@
+// Copyright 2016 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 (
+ "internal/testenv"
+ "runtime"
+ "testing"
+)
+
+func TestListenMulticastUDP(t *testing.T) {
+ testenv.MustHaveExternalNetwork(t)
+
+ ifcs, err := Interfaces()
+ if err != nil {
+ t.Skip(err.Error())
+ }
+ if len(ifcs) == 0 {
+ t.Skip("no network interfaces found")
+ }
+
+ var mifc *Interface
+ for _, ifc := range ifcs {
+ if ifc.Flags&FlagUp|FlagMulticast != FlagUp|FlagMulticast {
+ continue
+ }
+ mifc = &ifc
+ break
+ }
+
+ if mifc == nil {
+ t.Skipf("no multicast interfaces found")
+ }
+
+ c1, err := ListenMulticastUDP("udp4", mifc, &UDPAddr{IP: ParseIP("224.0.0.254")})
+ if err != nil {
+ t.Fatalf("multicast not working on %s: %v", runtime.GOOS, err)
+ }
+ c1addr := c1.LocalAddr().(*UDPAddr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c1.Close()
+
+ c2, err := ListenUDP("udp4", &UDPAddr{IP: IPv4zero, Port: 0})
+ c2addr := c2.LocalAddr().(*UDPAddr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c2.Close()
+
+ n, err := c2.WriteToUDP([]byte("data"), c1addr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if n != 4 {
+ t.Fatalf("got %d; want 4", n)
+ }
+
+ n, err = c1.WriteToUDP([]byte("data"), c2addr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if n != 4 {
+ t.Fatalf("got %d; want 4", n)
+ }
+}