net: fix zero-byte payload bug in WriteTo() for windows

Fixes golang#26668
silbinarywolf · Sep 2, 2018 · 2ab0559 · 2ab0559
1 parent 79faa7a
commit 2ab0559
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diff --git a/src/internal/poll/fd_windows.go b/src/internal/poll/fd_windows.go
@@ -761,9 +761,6 @@ func (fd *FD) Writev(buf *[][]byte) (int64, error) {
 
 // WriteTo wraps the sendto network call.
 func (fd *FD) WriteTo(buf []byte, sa syscall.Sockaddr) (int, error) {
-	if len(buf) == 0 {
-		return 0, nil
-	}
 	if err := fd.writeLock(); err != nil {
 		return 0, err
 	}

diff --git a/src/net/udpsock_test.go b/src/net/udpsock_test.go
@@ -337,8 +337,6 @@ func TestUDPZeroBytePayload(t *testing.T) {
 	switch runtime.GOOS {
 	case "nacl", "plan9":
 		t.Skipf("not supported on %s", runtime.GOOS)
-	case "windows":
-		t.Skipf("zero byte payload is broken on %s. See Github Issue #26668.", runtime.GOOS)
 	}
 
 	c, err := newLocalPacketListener("udp")