Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/net/tcpsockopt_solaris.go b/src/net/tcpsockopt_solaris.go
new file mode 100644
index 0000000..f15e589
--- /dev/null
+++ b/src/net/tcpsockopt_solaris.go
@@ -0,0 +1,32 @@
+// 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.
+
+package net
+
+import (
+	"runtime"
+	"syscall"
+	"time"
+)
+
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+	// The kernel expects milliseconds so round to next highest
+	// millisecond.
+	msecs := int(roundDurationUp(d, time.Millisecond))
+
+	// Normally we'd do
+	//	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)
+	runtime.KeepAlive(fd)
+	return wrapSyscallError("setsockopt", err)
+}