From 2cd9837e02924e28f4e0e8aafcda81ed6fe7fbf9 Mon Sep 17 00:00:00 2001
From: MAntoniak <47522782+MAntoniak@users.noreply.github.com>
Date: Wed, 2 Mar 2022 23:36:38 +0100
Subject: [PATCH] connect: use TCP_KEEPALIVE only if TCP_KEEPIDLE is not
 defined

Closes #8539
---
 lib/connect.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/lib/connect.c b/lib/connect.c
index 64f951118b..c2241b48a6 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -137,6 +137,14 @@ tcpkeepalive(struct Curl_easy *data,
           (void *)&optval, sizeof(optval)) < 0) {
       infof(data, "Failed to set TCP_KEEPIDLE on fd %d", sockfd);
     }
+#elif defined(TCP_KEEPALIVE)
+    /* Mac OS X style */
+    optval = curlx_sltosi(data->set.tcp_keepidle);
+    KEEPALIVE_FACTOR(optval);
+    if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
+      (void *)&optval, sizeof(optval)) < 0) {
+      infof(data, "Failed to set TCP_KEEPALIVE on fd %d", sockfd);
+    }
 #endif
 #ifdef TCP_KEEPINTVL
     optval = curlx_sltosi(data->set.tcp_keepintvl);
@@ -146,15 +154,6 @@ tcpkeepalive(struct Curl_easy *data,
       infof(data, "Failed to set TCP_KEEPINTVL on fd %d", sockfd);
     }
 #endif
-#ifdef TCP_KEEPALIVE
-    /* Mac OS X style */
-    optval = curlx_sltosi(data->set.tcp_keepidle);
-    KEEPALIVE_FACTOR(optval);
-    if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
-          (void *)&optval, sizeof(optval)) < 0) {
-      infof(data, "Failed to set TCP_KEEPALIVE on fd %d", sockfd);
-    }
-#endif
 #endif
   }
 }