1 files changed, 29 insertions, 0 deletions
diff --git a/src/net/tcpsockopt_windows.go b/src/net/tcpsockopt_windows.go
new file mode 100644
index 0000000..4a0b094
--- /dev/null
+++ b/src/net/tcpsockopt_windows.go
@@ -0,0 +1,29 @@
+// Copyright 2009 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 (
+	"os"
+	"runtime"
+	"syscall"
+	"time"
+	"unsafe"
+)
+
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+	// The kernel expects milliseconds so round to next highest
+	// millisecond.
+	msecs := uint32(roundDurationUp(d, time.Millisecond))
+	ka := syscall.TCPKeepalive{
+		OnOff:    1,
+		Time:     msecs,
+		Interval: msecs,
+	}
+	ret := uint32(0)
+	size := uint32(unsafe.Sizeof(ka))
+	err := fd.pfd.WSAIoctl(syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
+	runtime.KeepAlive(fd)
+	return os.NewSyscallError("wsaioctl", err)
+}