Enable rustix::net on Redox. (#1302)

Redox supports most of the socket APIs, so enable `rustix::net` on
Redox.

Author: sunfishcode

src/backend/libc/conv.rs

@@ -151,7 +151,7 @@ pub(super) fn ret_discarded_char_ptr(raw: *mut c::c_char) -> io::Result<()> {
 }
 
 /// Convert the buffer-length argument value of a `send` or `recv` call.
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[cfg(not(any(windows, target_os = "wasi")))]
 #[inline]
 pub(super) fn send_recv_len(len: usize) -> usize {
     len
@@ -168,7 +168,7 @@ pub(super) fn send_recv_len(len: usize) -> i32 {
 }
 
 /// Convert the return value of a `send` or `recv` call.
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[cfg(not(any(windows, target_os = "wasi")))]
 #[inline]
 pub(super) fn ret_send_recv(len: isize) -> io::Result<usize> {
     ret_usize(len)
@@ -183,7 +183,7 @@ pub(super) fn ret_send_recv(len: i32) -> io::Result<usize> {
 
 /// Convert the value to the `msg_iovlen` field of a `msghdr` struct.
 #[cfg(all(
-    not(any(windows, target_os = "espidf", target_os = "redox", target_os = "wasi")),
+    not(any(windows, target_os = "espidf", target_os = "wasi")),
     any(
         target_os = "android",
         all(

src/backend/libc/mod.rs

@@ -117,7 +117,7 @@ pub(crate) mod mm;
 #[cfg(linux_kernel)]
 #[cfg(feature = "mount")]
 pub(crate) mod mount;
-#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[cfg(not(target_os = "wasi"))]
 #[cfg(feature = "net")]
 pub(crate) mod net;
 #[cfg(not(any(windows, target_os = "espidf")))]

src/backend/libc/net/mod.rs

@@ -1,18 +1,11 @@
 pub(crate) mod addr;
 pub(crate) mod ext;
-#[cfg(not(any(
-    windows,
-    target_os = "espidf",
-    target_os = "redox",
-    target_os = "vita",
-    target_os = "wasi"
-)))]
+#[cfg(not(any(windows, target_os = "espidf", target_os = "redox", target_os = "vita")))]
 pub(crate) mod msghdr;
 #[cfg(linux_kernel)]
 pub(crate) mod netdevice;
 pub(crate) mod read_sockaddr;
 pub(crate) mod send_recv;
-#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
 pub(crate) mod sockopt;
 pub(crate) mod syscalls;
 pub(crate) mod write_sockaddr;

src/backend/libc/net/send_recv.rs

@@ -20,6 +20,7 @@ bitflags! {
             target_os = "nto",
             target_os = "haiku",
             target_os = "hurd",
+            target_os = "redox",
             target_os = "vita",
         )))]
         const CONFIRM = bitcast!(c::MSG_CONFIRM);
@@ -40,10 +41,11 @@ bitflags! {
             target_os = "haiku",
             target_os = "hurd",
             target_os = "nto",
+            target_os = "redox",
             target_os = "vita",
         )))]
         const MORE = bitcast!(c::MSG_MORE);
-        #[cfg(not(any(apple, windows, target_os = "vita")))]
+        #[cfg(not(any(apple, windows, target_os = "redox", target_os = "vita")))]
         /// `MSG_NOSIGNAL`
         const NOSIGNAL = bitcast!(c::MSG_NOSIGNAL);
         /// `MSG_OOB`
@@ -72,6 +74,7 @@ bitflags! {
             target_os = "espidf",
             target_os = "haiku",
             target_os = "nto",
+            target_os = "redox",
             target_os = "vita",
         )))]
         const CMSG_CLOEXEC = bitcast!(c::MSG_CMSG_CLOEXEC);
@@ -88,6 +91,7 @@ bitflags! {
             target_os = "haiku",
             target_os = "hurd",
             target_os = "nto",
+            target_os = "redox",
             target_os = "vita",
         )))]
         const ERRQUEUE = bitcast!(c::MSG_ERRQUEUE);

src/backend/libc/net/sockopt.rs

@@ -844,6 +844,7 @@ pub(crate) fn ipv6_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV6>
     windows,
     target_os = "espidf",
     target_os = "haiku",
+    target_os = "redox",
     target_os = "vita"
 )))]
 #[inline]
@@ -856,6 +857,7 @@ pub(crate) fn set_ipv6_tclass(fd: BorrowedFd<'_>, value: u32) -> io::Result<()>
     windows,
     target_os = "espidf",
     target_os = "haiku",
+    target_os = "redox",
     target_os = "vita"
 )))]
 #[inline]
@@ -874,13 +876,23 @@ pub(crate) fn tcp_nodelay(fd: BorrowedFd<'_>) -> io::Result<bool> {
 }
 
 #[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+#[cfg(not(any(
+    target_os = "openbsd",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox"
+)))]
 pub(crate) fn set_tcp_keepcnt(fd: BorrowedFd<'_>, count: u32) -> io::Result<()> {
     setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT, count)
 }
 
 #[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+#[cfg(not(any(
+    target_os = "openbsd",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox"
+)))]
 pub(crate) fn tcp_keepcnt(fd: BorrowedFd<'_>) -> io::Result<u32> {
     getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT)
 }
@@ -900,14 +912,24 @@ pub(crate) fn tcp_keepidle(fd: BorrowedFd<'_>) -> io::Result<Duration> {
 }
 
 #[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+#[cfg(not(any(
+    target_os = "openbsd",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox"
+)))]
 pub(crate) fn set_tcp_keepintvl(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
     let secs: c::c_uint = duration_to_secs(duration)?;
     setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL, secs)
 }
 
 #[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+#[cfg(not(any(
+    target_os = "openbsd",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox"
+)))]
 pub(crate) fn tcp_keepintvl(fd: BorrowedFd<'_>) -> io::Result<Duration> {
     let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL)?;
     Ok(Duration::from_secs(secs as u64))