1 files changed, 541 insertions, 0 deletions
diff --git a/library/std/src/sys/sgx/net.rs b/library/std/src/sys/sgx/net.rs
new file mode 100644
index 000000000..4c4cd7d1d
--- /dev/null
+++ b/library/std/src/sys/sgx/net.rs
@@ -0,0 +1,541 @@
+use crate::error;
+use crate::fmt;
+use crate::io::{self, IoSlice, IoSliceMut};
+use crate::net::{Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr, ToSocketAddrs};
+use crate::sync::Arc;
+use crate::sys::fd::FileDesc;
+use crate::sys::{sgx_ineffective, unsupported, AsInner, FromInner, IntoInner, TryIntoInner};
+use crate::time::Duration;
+
+use super::abi::usercalls;
+
+const DEFAULT_FAKE_TTL: u32 = 64;
+
+#[derive(Debug, Clone)]
+pub struct Socket {
+    inner: Arc<FileDesc>,
+    local_addr: Option<String>,
+}
+
+impl Socket {
+    fn new(fd: usercalls::raw::Fd, local_addr: String) -> Socket {
+        Socket { inner: Arc::new(FileDesc::new(fd)), local_addr: Some(local_addr) }
+    }
+}
+
+impl AsInner<FileDesc> for Socket {
+    fn as_inner(&self) -> &FileDesc {
+        &self.inner
+    }
+}
+
+impl TryIntoInner<FileDesc> for Socket {
+    fn try_into_inner(self) -> Result<FileDesc, Socket> {
+        let Socket { inner, local_addr } = self;
+        Arc::try_unwrap(inner).map_err(|inner| Socket { inner, local_addr })
+    }
+}
+
+impl FromInner<(FileDesc, Option<String>)> for Socket {
+    fn from_inner((inner, local_addr): (FileDesc, Option<String>)) -> Socket {
+        Socket { inner: Arc::new(inner), local_addr }
+    }
+}
+
+#[derive(Clone)]
+pub struct TcpStream {
+    inner: Socket,
+    peer_addr: Option<String>,
+}
+
+impl fmt::Debug for TcpStream {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut res = f.debug_struct("TcpStream");
+
+        if let Some(ref addr) = self.inner.local_addr {
+            res.field("addr", addr);
+        }
+
+        if let Some(ref peer) = self.peer_addr {
+            res.field("peer", peer);
+        }
+
+        res.field("fd", &self.inner.inner.as_inner()).finish()
+    }
+}
+
+fn io_err_to_addr(result: io::Result<&SocketAddr>) -> io::Result<String> {
+    match result {
+        Ok(saddr) => Ok(saddr.to_string()),
+        // need to downcast twice because io::Error::into_inner doesn't return the original
+        // value if the conversion fails
+        Err(e) => {
+            if e.get_ref().and_then(|e| e.downcast_ref::<NonIpSockAddr>()).is_some() {
+                Ok(e.into_inner().unwrap().downcast::<NonIpSockAddr>().unwrap().host)
+            } else {
+                Err(e)
+            }
+        }
+    }
+}
+
+fn addr_to_sockaddr(addr: &Option<String>) -> io::Result<SocketAddr> {
+    addr.as_ref()
+        .ok_or(io::ErrorKind::AddrNotAvailable)?
+        .to_socket_addrs()
+        // unwrap OK: if an iterator is returned, we're guaranteed to get exactly one entry
+        .map(|mut it| it.next().unwrap())
+}
+
+impl TcpStream {
+    pub fn connect(addr: io::Result<&SocketAddr>) -> io::Result<TcpStream> {
+        let addr = io_err_to_addr(addr)?;
+        let (fd, local_addr, peer_addr) = usercalls::connect_stream(&addr)?;
+        Ok(TcpStream { inner: Socket::new(fd, local_addr), peer_addr: Some(peer_addr) })
+    }
+
+    pub fn connect_timeout(addr: &SocketAddr, dur: Duration) -> io::Result<TcpStream> {
+        if dur == Duration::default() {
+            return Err(io::const_io_error!(
+                io::ErrorKind::InvalidInput,
+                "cannot set a 0 duration timeout",
+            ));
+        }
+        Self::connect(Ok(addr)) // FIXME: ignoring timeout
+    }
+
+    pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> {
+        match dur {
+            Some(dur) if dur == Duration::default() => {
+                return Err(io::const_io_error!(
+                    io::ErrorKind::InvalidInput,
+                    "cannot set a 0 duration timeout",
+                ));
+            }
+            _ => sgx_ineffective(()),
+        }
+    }
+
+    pub fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()> {
+        match dur {
+            Some(dur) if dur == Duration::default() => {
+                return Err(io::const_io_error!(
+                    io::ErrorKind::InvalidInput,
+                    "cannot set a 0 duration timeout",
+                ));
+            }
+            _ => sgx_ineffective(()),
+        }
+    }
+
+    pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
+        sgx_ineffective(None)
+    }
+
+    pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
+        sgx_ineffective(None)
+    }
+
+    pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
+        Ok(0)
+    }
+
+    pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.inner.inner.read(buf)
+    }
+
+    pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        self.inner.inner.read_vectored(bufs)
+    }
+
+    #[inline]
+    pub fn is_read_vectored(&self) -> bool {
+        self.inner.inner.is_read_vectored()
+    }
+
+    pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
+        self.inner.inner.write(buf)
+    }
+
+    pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+        self.inner.inner.write_vectored(bufs)
+    }
+
+    #[inline]
+    pub fn is_write_vectored(&self) -> bool {
+        self.inner.inner.is_write_vectored()
+    }
+
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        addr_to_sockaddr(&self.peer_addr)
+    }
+
+    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
+        addr_to_sockaddr(&self.inner.local_addr)
+    }
+
+    pub fn shutdown(&self, _: Shutdown) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn duplicate(&self) -> io::Result<TcpStream> {
+        Ok(self.clone())
+    }
+
+    pub fn set_linger(&self, _: Option<Duration>) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn linger(&self) -> io::Result<Option<Duration>> {
+        sgx_ineffective(None)
+    }
+
+    pub fn set_nodelay(&self, _: bool) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn nodelay(&self) -> io::Result<bool> {
+        sgx_ineffective(false)
+    }
+
+    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn ttl(&self) -> io::Result<u32> {
+        sgx_ineffective(DEFAULT_FAKE_TTL)
+    }
+
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        Ok(None)
+    }
+
+    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+}
+
+impl AsInner<Socket> for TcpStream {
+    fn as_inner(&self) -> &Socket {
+        &self.inner
+    }
+}
+
+// `Inner` includes `peer_addr` so that a `TcpStream` maybe correctly
+// reconstructed if `Socket::try_into_inner` fails.
+impl IntoInner<(Socket, Option<String>)> for TcpStream {
+    fn into_inner(self) -> (Socket, Option<String>) {
+        (self.inner, self.peer_addr)
+    }
+}
+
+impl FromInner<(Socket, Option<String>)> for TcpStream {
+    fn from_inner((inner, peer_addr): (Socket, Option<String>)) -> TcpStream {
+        TcpStream { inner, peer_addr }
+    }
+}
+
+#[derive(Clone)]
+pub struct TcpListener {
+    inner: Socket,
+}
+
+impl fmt::Debug for TcpListener {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut res = f.debug_struct("TcpListener");
+
+        if let Some(ref addr) = self.inner.local_addr {
+            res.field("addr", addr);
+        }
+
+        res.field("fd", &self.inner.inner.as_inner()).finish()
+    }
+}
+
+impl TcpListener {
+    pub fn bind(addr: io::Result<&SocketAddr>) -> io::Result<TcpListener> {
+        let addr = io_err_to_addr(addr)?;
+        let (fd, local_addr) = usercalls::bind_stream(&addr)?;
+        Ok(TcpListener { inner: Socket::new(fd, local_addr) })
+    }
+
+    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
+        addr_to_sockaddr(&self.inner.local_addr)
+    }
+
+    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
+        let (fd, local_addr, peer_addr) = usercalls::accept_stream(self.inner.inner.raw())?;
+        let peer_addr = Some(peer_addr);
+        let ret_peer = addr_to_sockaddr(&peer_addr).unwrap_or_else(|_| ([0; 4], 0).into());
+        Ok((TcpStream { inner: Socket::new(fd, local_addr), peer_addr }, ret_peer))
+    }
+
+    pub fn duplicate(&self) -> io::Result<TcpListener> {
+        Ok(self.clone())
+    }
+
+    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn ttl(&self) -> io::Result<u32> {
+        sgx_ineffective(DEFAULT_FAKE_TTL)
+    }
+
+    pub fn set_only_v6(&self, _: bool) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+
+    pub fn only_v6(&self) -> io::Result<bool> {
+        sgx_ineffective(false)
+    }
+
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        Ok(None)
+    }
+
+    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
+        sgx_ineffective(())
+    }
+}
+
+impl AsInner<Socket> for TcpListener {
+    fn as_inner(&self) -> &Socket {
+        &self.inner
+    }
+}
+
+impl IntoInner<Socket> for TcpListener {
+    fn into_inner(self) -> Socket {
+        self.inner
+    }
+}
+
+impl FromInner<Socket> for TcpListener {
+    fn from_inner(inner: Socket) -> TcpListener {
+        TcpListener { inner }
+    }
+}
+
+pub struct UdpSocket(!);
+
+impl UdpSocket {
+    pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<UdpSocket> {
+        unsupported()
+    }
+
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        self.0
+    }
+
+    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
+        self.0
+    }
+
+    pub fn recv_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        self.0
+    }
+
+    pub fn peek_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        self.0
+    }
+
+    pub fn send_to(&self, _: &[u8], _: &SocketAddr) -> io::Result<usize> {
+        self.0
+    }
+
+    pub fn duplicate(&self) -> io::Result<UdpSocket> {
+        self.0
+    }
+
+    pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
+        self.0
+    }
+
+    pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
+        self.0
+    }
+
+    pub fn set_broadcast(&self, _: bool) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn broadcast(&self) -> io::Result<bool> {
+        self.0
+    }
+
+    pub fn set_multicast_loop_v4(&self, _: bool) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
+        self.0
+    }
+
+    pub fn set_multicast_ttl_v4(&self, _: u32) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
+        self.0
+    }
+
+    pub fn set_multicast_loop_v6(&self, _: bool) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
+        self.0
+    }
+
+    pub fn join_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn join_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn leave_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn leave_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.0
+    }
+
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.0
+    }
+
+    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
+        self.0
+    }
+
+    pub fn recv(&self, _: &mut [u8]) -> io::Result<usize> {
+        self.0
+    }
+
+    pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
+        self.0
+    }
+
+    pub fn send(&self, _: &[u8]) -> io::Result<usize> {
+        self.0
+    }
+
+    pub fn connect(&self, _: io::Result<&SocketAddr>) -> io::Result<()> {
+        self.0
+    }
+}
+
+impl fmt::Debug for UdpSocket {
+    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.0
+    }
+}
+
+#[derive(Debug)]
+pub struct NonIpSockAddr {
+    host: String,
+}
+
+impl error::Error for NonIpSockAddr {
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        "Failed to convert address to SocketAddr"
+    }
+}
+
+impl fmt::Display for NonIpSockAddr {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Failed to convert address to SocketAddr: {}", self.host)
+    }
+}
+
+pub struct LookupHost(!);
+
+impl LookupHost {
+    fn new(host: String) -> io::Result<LookupHost> {
+        Err(io::Error::new(io::ErrorKind::Uncategorized, NonIpSockAddr { host }))
+    }
+
+    pub fn port(&self) -> u16 {
+        self.0
+    }
+}
+
+impl Iterator for LookupHost {
+    type Item = SocketAddr;
+    fn next(&mut self) -> Option<SocketAddr> {
+        self.0
+    }
+}
+
+impl TryFrom<&str> for LookupHost {
+    type Error = io::Error;
+
+    fn try_from(v: &str) -> io::Result<LookupHost> {
+        LookupHost::new(v.to_owned())
+    }
+}
+
+impl<'a> TryFrom<(&'a str, u16)> for LookupHost {
+    type Error = io::Error;
+
+    fn try_from((host, port): (&'a str, u16)) -> io::Result<LookupHost> {
+        LookupHost::new(format!("{host}:{port}"))
+    }
+}
+
+#[allow(bad_style)]
+pub mod netc {
+    pub const AF_INET: u8 = 0;
+    pub const AF_INET6: u8 = 1;
+    pub type sa_family_t = u8;
+
+    #[derive(Copy, Clone)]
+    pub struct in_addr {
+        pub s_addr: u32,
+    }
+
+    #[derive(Copy, Clone)]
+    pub struct sockaddr_in {
+        pub sin_family: sa_family_t,
+        pub sin_port: u16,
+        pub sin_addr: in_addr,
+    }
+
+    #[derive(Copy, Clone)]
+    pub struct in6_addr {
+        pub s6_addr: [u8; 16],
+    }
+
+    #[derive(Copy, Clone)]
+    pub struct sockaddr_in6 {
+        pub sin6_family: sa_family_t,
+        pub sin6_port: u16,
+        pub sin6_addr: in6_addr,
+        pub sin6_flowinfo: u32,
+        pub sin6_scope_id: u32,
+    }
+
+    #[derive(Copy, Clone)]
+    pub struct sockaddr {}
+}