| // Copyright 2015 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. |
| func setKeepAlivePeriod(fd *netFD, d time.Duration) error { |
| // The kernel expects milliseconds so round to next highest |
| d += (time.Millisecond - time.Nanosecond) |
| msecs := int(d / time.Millisecond) |
| // syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs) |
| // here, but we can't because Solaris does not have TCP_KEEPINTVL. |
| // Solaris has TCP_KEEPALIVE_ABORT_THRESHOLD, but it's not the same |
| // thing, it refers to the total time until aborting (not between |
| // probes), and it uses an exponential backoff algorithm instead of |
| // waiting the same time between probes. We can't hope for the best |
| // and do it anyway, like on Darwin, because Solaris might eventually |
| // allocate a constant with a different meaning for the value of |
| // TCP_KEEPINTVL on illumos. |
| err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE_THRESHOLD, msecs) |
| return wrapSyscallError("setsockopt", err) |