| // 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. |
| const sysTCP_KEEPINTVL = 0x101 |
| func setKeepAlivePeriod(fd *netFD, d time.Duration) error { |
| if err := fd.incref(); err != nil { |
| // The kernel expects seconds so round to next highest second. |
| d += (time.Second - time.Nanosecond) |
| switch err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, sysTCP_KEEPINTVL, secs); err { |
| case nil, syscall.ENOPROTOOPT: // OS X 10.7 and earlier don't support this option |
| return os.NewSyscallError("setsockopt", err) |
| return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE, secs)) |