Make keepalive sockopt tests os dependent.

Author: yoav-steinberg

test/sys/test_sockopt.rs

@@ -74,15 +74,21 @@ fn test_so_tcp_keepalive() {
     setsockopt(fd, sockopt::KeepAlive, &true).unwrap();
     assert_eq!(getsockopt(fd, sockopt::KeepAlive).unwrap(), true);
 
-    let x = getsockopt(fd, sockopt::TcpKeepIdle).unwrap();
-    setsockopt(fd, sockopt::TcpKeepIdle, &(x+1)).unwrap();
-    assert_eq!(getsockopt(fd, sockopt::TcpKeepIdle).unwrap(), x+1);
-
-    let x = getsockopt(fd, sockopt::TcpKeepCount).unwrap();
-    setsockopt(fd, sockopt::TcpKeepCount, &(x+1)).unwrap();
-    assert_eq!(getsockopt(fd, sockopt::TcpKeepCount).unwrap(), x+1);
-
-    let x = getsockopt(fd, sockopt::TcpKeepInterval).unwrap();
-    setsockopt(fd, sockopt::TcpKeepInterval, &(x+1)).unwrap();
-    assert_eq!(getsockopt(fd, sockopt::TcpKeepInterval).unwrap(), x+1);
+    #[cfg(any(target_os = "android",
+              target_os = "dragonfly",
+              target_os = "freebsd",
+              target_os = "linux",
+              target_os = "nacl"))] {
+        let x = getsockopt(fd, sockopt::TcpKeepIdle).unwrap();
+        setsockopt(fd, sockopt::TcpKeepIdle, &(x + 1)).unwrap();
+        assert_eq!(getsockopt(fd, sockopt::TcpKeepIdle).unwrap(), x + 1);
+
+        let x = getsockopt(fd, sockopt::TcpKeepCount).unwrap();
+        setsockopt(fd, sockopt::TcpKeepCount, &(x + 1)).unwrap();
+        assert_eq!(getsockopt(fd, sockopt::TcpKeepCount).unwrap(), x + 1);
+
+        let x = getsockopt(fd, sockopt::TcpKeepInterval).unwrap();
+        setsockopt(fd, sockopt::TcpKeepInterval, &(x + 1)).unwrap();
+        assert_eq!(getsockopt(fd, sockopt::TcpKeepInterval).unwrap(), x + 1);
+    }
 }