1 files changed, 24 insertions, 0 deletions
diff --git a/src/net/tcpsockopt_unix.go b/src/net/tcpsockopt_unix.go
new file mode 100644
index 0000000..bdcdc40
--- /dev/null
+++ b/src/net/tcpsockopt_unix.go
@@ -0,0 +1,24 @@
+// 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.
+
+//go:build aix || freebsd || linux || netbsd
+
+package net
+
+import (
+	"runtime"
+	"syscall"
+	"time"
+)
+
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+	// The kernel expects seconds so round to next highest second.
+	secs := int(roundDurationUp(d, time.Second))
+	if err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs); err != nil {
+		return wrapSyscallError("setsockopt", err)
+	}
+	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, secs)
+	runtime.KeepAlive(fd)
+	return wrapSyscallError("setsockopt", err)
+}