net: add SetKeepAlivePeriod for windows
R=golang-codereviews, alex.brainman, bradfitz, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/11393043
diff --git a/src/pkg/net/tcpsockopt_windows.go b/src/pkg/net/tcpsockopt_windows.go
index 0bf4312..8ef1407 100644
--- a/src/pkg/net/tcpsockopt_windows.go
+++ b/src/pkg/net/tcpsockopt_windows.go
@@ -7,7 +7,10 @@
package net
import (
+ "os"
+ "syscall"
"time"
+ "unsafe"
)
func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
@@ -16,6 +19,16 @@
}
defer fd.decref()
- // We can't actually set this per connection. Act as a noop rather than an error.
- return nil
+ // Windows expects milliseconds so round to next highest millisecond.
+ d += (time.Millisecond - time.Nanosecond)
+ millis := uint32(d / time.Millisecond)
+ ka := syscall.TCPKeepalive{
+ OnOff: 1,
+ Time: millis,
+ Interval: millis,
+ }
+ ret := uint32(0)
+ size := uint32(unsafe.Sizeof(ka))
+ err := syscall.WSAIoctl(fd.sysfd, syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
+ return os.NewSyscallError("WSAIoctl", err)
}
