net: separate NaCl dependent placeholders from BSD's

To clarify the dependency of NaCl platform.

LGTM=adg
R=golang-codereviews, adg
CC=golang-codereviews
https://codereview.appspot.com/143830044

1 files changed, 16 insertions, 0 deletions

diff --git a/src/net/tcpsockopt_openbsd.go b/src/net/tcpsockopt_openbsd.go
new file mode 100644
index 000000000..041e1786a
--- /dev/null
+++ b/src/net/tcpsockopt_openbsd.go
@@ -0,0 +1,16 @@
+// 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 (
+	"syscall"
+	"time"
+)
+
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+	// OpenBSD has no user-settable per-socket TCP keepalive
+	// options.
+	return syscall.ENOPROTOOPT
+}