From 297d8ddeb0d5834b47f40a5bd624aa0c2cfb9c7a Mon Sep 17 00:00:00 2001
From: Easwar Swaminathan <easwars@google.com>
Date: Mon, 11 Dec 2023 13:07:06 -0800
Subject: [PATCH] Cherry-pick #6841 to v1.60.x release branch (#6847)

---
 internal/tcp_keepalive_nonunix.go             | 29 +++++++++++++++++++
 ...tcp_keepalive.go => tcp_keepalive_unix.go} |  6 +++-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 internal/tcp_keepalive_nonunix.go
 rename internal/{tcp_keepalive.go => tcp_keepalive_unix.go} (94%)

diff --git a/internal/tcp_keepalive_nonunix.go b/internal/tcp_keepalive_nonunix.go
new file mode 100644
index 000000000000..aeffd3e1c7b1
--- /dev/null
+++ b/internal/tcp_keepalive_nonunix.go
@@ -0,0 +1,29 @@
+//go:build !unix
+
+/*
+ * Copyright 2023 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package internal
+
+import (
+	"net"
+)
+
+// NetDialerWithTCPKeepalive returns a vanilla net.Dialer on non-unix platforms.
+func NetDialerWithTCPKeepalive() *net.Dialer {
+	return &net.Dialer{}
+}
diff --git a/internal/tcp_keepalive.go b/internal/tcp_keepalive_unix.go
similarity index 94%
rename from internal/tcp_keepalive.go
rename to internal/tcp_keepalive_unix.go
index 9f6d039ac740..078137b7fd70 100644
--- a/internal/tcp_keepalive.go
+++ b/internal/tcp_keepalive_unix.go
@@ -1,3 +1,5 @@
+//go:build unix
+
 /*
  * Copyright 2023 gRPC authors.
  *
@@ -21,6 +23,8 @@ import (
 	"net"
 	"syscall"
 	"time"
+
+	"golang.org/x/sys/unix"
 )
 
 // NetDialerWithTCPKeepalive returns a net.Dialer that enables TCP keepalives on
@@ -43,7 +47,7 @@ func NetDialerWithTCPKeepalive() *net.Dialer {
 		// the TCP keealive interval and time parameters.
 		Control: func(_, _ string, c syscall.RawConn) error {
 			return c.Control(func(fd uintptr) {
-				syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1)
+				unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 1)
 			})
 		},
 	}