fix: Align the cfg compilation with the socket2

Author: linyihai

src/client/legacy/connect/http.rs

@@ -111,48 +111,55 @@ impl TcpKeepaliveConfig {
         }
     }
 
-    #[cfg(not(any(
-        target_os = "aix",
-        target_os = "openbsd",
-        target_os = "redox",
-        target_os = "solaris"
-    )))]
     fn ka_with_interval(ka: TcpKeepalive, interval: Duration, dirty: &mut bool) -> TcpKeepalive {
-        *dirty = true;
-        ka.with_interval(interval)
-    }
-
-    #[cfg(any(
-        target_os = "aix",
-        target_os = "openbsd",
-        target_os = "redox",
-        target_os = "solaris"
-    ))]
-    fn ka_with_interval(ka: TcpKeepalive, _: Duration, _: &mut bool) -> TcpKeepalive {
-        ka // no-op as keepalive interval is not supported on this platform
+        if cfg!(
+            // See https://docs.rs/socket2/0.5.8/src/socket2/lib.rs.html#511-525
+            any(
+                target_os = "android",
+                target_os = "dragonfly",
+                target_os = "freebsd",
+                target_os = "fuchsia",
+                target_os = "illumos",
+                target_os = "ios",
+                target_os = "visionos",
+                target_os = "linux",
+                target_os = "macos",
+                target_os = "netbsd",
+                target_os = "tvos",
+                target_os = "watchos",
+                target_os = "windows",
+            )
+        ) {
+            *dirty = true;
+            ka.with_interval(interval)
+        } else {
+            ka
+        }
     }
 
-    #[cfg(not(any(
-        target_os = "aix",
-        target_os = "openbsd",
-        target_os = "redox",
-        target_os = "solaris",
-        target_os = "windows"
-    )))]
     fn ka_with_retries(ka: TcpKeepalive, retries: u32, dirty: &mut bool) -> TcpKeepalive {
-        *dirty = true;
-        ka.with_retries(retries)
-    }
-
-    #[cfg(any(
-        target_os = "aix",
-        target_os = "openbsd",
-        target_os = "redox",
-        target_os = "solaris",
-        target_os = "windows"
-    ))]
-    fn ka_with_retries(ka: TcpKeepalive, _: u32, _: &mut bool) -> TcpKeepalive {
-        ka // no-op as keepalive retries is not supported on this platform
+        if cfg!(
+            // See https://docs.rs/socket2/0.5.8/src/socket2/lib.rs.html#557-570
+            any(
+                target_os = "android",
+                target_os = "dragonfly",
+                target_os = "freebsd",
+                target_os = "fuchsia",
+                target_os = "illumos",
+                target_os = "ios",
+                target_os = "visionos",
+                target_os = "linux",
+                target_os = "macos",
+                target_os = "netbsd",
+                target_os = "tvos",
+                target_os = "watchos",
+            )
+        ) {
+            *dirty = true;
+            ka.with_retries(retries)
+        } else {
+            ka
+        }
     }
 }