net: simplify socket option helpers
Also consolidates syscall.IPPROTO_TCP level option helper files.
R=golang-dev, dave, alex.brainman
CC=golang-dev
https://golang.org/cl/8637049
diff --git a/src/pkg/net/tcpsockopt_unix.go b/src/pkg/net/tcpsockopt_unix.go
new file mode 100644
index 0000000..dfc0452
--- /dev/null
+++ b/src/pkg/net/tcpsockopt_unix.go
@@ -0,0 +1,31 @@
+// 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.
+
+// +build freebsd linux netbsd
+
+package net
+
+import (
+ "os"
+ "syscall"
+ "time"
+)
+
+// Set keep alive period.
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+ if err := fd.incref(false); err != nil {
+ return err
+ }
+ defer fd.decref()
+
+ // The kernel expects seconds so round to next highest second.
+ d += (time.Second - time.Nanosecond)
+ secs := int(d.Seconds())
+
+ err := os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs))
+ if err != nil {
+ return err
+ }
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, secs))
+}
