use as_raw_fd directly

test/sys/test_socket.rs

@@ -65,7 +65,6 @@ pub fn test_timestamping() {
         SockFlag, SockType, TimestampingFlag,
     };
     use nix::sys::uio::IoVec;
-    use std::os::unix::prelude::AsRawFd;
 
     let std_sa = SocketAddr::from_str("127.0.0.1:6790").unwrap();
     let inet_addr = InetAddr::from_std(&std_sa);
@@ -78,7 +77,6 @@ pub fn test_timestamping() {
         None,
     )
     .expect("send socket failed");
-    let sfd = ssock.as_raw_fd();
 
     let rsock = socket(
         AddressFamily::Inet,
@@ -88,18 +86,17 @@ pub fn test_timestamping() {
     )
     .unwrap();
     nix::sys::socket::bind(rsock, &sock_addr).unwrap();
-    let rfd = rsock.as_raw_fd();
 
-    setsockopt(rfd, Timestamping, &TimestampingFlag::all()).unwrap();
+    setsockopt(rsock, Timestamping, &TimestampingFlag::all()).unwrap();
 
     let sbuf = [0u8; 2048];
     let mut rbuf = [0u8; 2048];
     let flags = MsgFlags::empty();
     let iov1 = [IoVec::from_slice(&sbuf)];
     let iov2 = [IoVec::from_mut_slice(&mut rbuf)];
     let mut cmsg = cmsg_space!(nix::sys::socket::Timestamps);
-    sendmsg(sfd, &iov1, &[], flags, Some(&sock_addr)).unwrap();
-    let recv = recvmsg(rfd, &iov2, Some(&mut cmsg), flags).unwrap();
+    sendmsg(ssock, &iov1, &[], flags, Some(&sock_addr)).unwrap();
+    let recv = recvmsg(rsock, &iov2, Some(&mut cmsg), flags).unwrap();
 
     let mut ts = None;
     for c in recv.cmsgs() {