src/libstd/sys/sgx/net.rs

   1 use fmt;
   2 use io::{self, IoVec, IoVecMut};
   3 use net::{SocketAddr, Shutdown, Ipv4Addr, Ipv6Addr, ToSocketAddrs};
   4 use time::Duration;
   5 use sys::{unsupported, Void, sgx_ineffective, AsInner, FromInner, IntoInner, TryIntoInner};
   6 use sys::fd::FileDesc;
   7 use convert::TryFrom;
   8 use error;
   9 use sync::Arc;
  10
  11 use super::abi::usercalls;
  12
  13 const DEFAULT_FAKE_TTL: u32 = 64;
  14
  15 #[derive(Debug, Clone)]
  16 pub struct Socket {
  17     inner: Arc<FileDesc>,
  18     local_addr: Option<String>,
  19 }
  20
  21 impl Socket {
  22     fn new(fd: usercalls::raw::Fd, local_addr: String) -> Socket {
  23         Socket { inner: Arc::new(FileDesc::new(fd)), local_addr: Some(local_addr) }
  24     }
  25 }
  26
  27 impl AsInner<FileDesc> for Socket {
  28     fn as_inner(&self) -> &FileDesc { &self.inner }
  29 }
  30
  31 impl TryIntoInner<FileDesc> for Socket {
  32     fn try_into_inner(self) -> Result<FileDesc, Socket> {
  33         let Socket { inner, local_addr } = self;
  34         Arc::try_unwrap(inner).map_err(|inner| Socket { inner, local_addr } )
  35     }
  36 }
  37
  38 impl FromInner<FileDesc> for Socket {
  39     fn from_inner(inner: FileDesc) -> Socket {
  40         Socket { inner: Arc::new(inner), local_addr: None }
  41     }
  42 }
  43
  44 #[derive(Debug, Clone)]
  45 pub struct TcpStream {
  46     inner: Socket,
  47     peer_addr: Option<String>,
  48 }
  49
  50 fn io_err_to_addr(result: io::Result<&SocketAddr>) -> io::Result<String> {
  51     match result {
  52         Ok(saddr) => Ok(saddr.to_string()),
  53         // need to downcast twice because io::Error::into_inner doesn't return the original
  54         // value if the conversion fails
  55         Err(e) => if e.get_ref().and_then(|e| e.downcast_ref::<NonIpSockAddr>()).is_some() {
  56             Ok(e.into_inner().unwrap().downcast::<NonIpSockAddr>().unwrap().host)
  57         } else {
  58             Err(e)
  59         }
  60     }
  61 }
  62
  63 fn addr_to_sockaddr(addr: &Option<String>) -> io::Result<SocketAddr> {
  64     addr.as_ref()
  65         .ok_or(io::ErrorKind::AddrNotAvailable)?
  66         .to_socket_addrs()
  67         // unwrap OK: if an iterator is returned, we're guaranteed to get exactly one entry
  68         .map(|mut it| it.next().unwrap())
  69 }
  70
  71 impl TcpStream {
  72     pub fn connect(addr: io::Result<&SocketAddr>) -> io::Result<TcpStream> {
  73         let addr = io_err_to_addr(addr)?;
  74         let (fd, local_addr, peer_addr) = usercalls::connect_stream(&addr)?;
  75         Ok(TcpStream { inner: Socket::new(fd, local_addr), peer_addr: Some(peer_addr) })
  76     }
  77
  78     pub fn connect_timeout(addr: &SocketAddr, _: Duration) -> io::Result<TcpStream> {
  79         Self::connect(Ok(addr)) // FIXME: ignoring timeout
  80     }
  81
  82     pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
  83         sgx_ineffective(())
  84     }
  85
  86     pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
  87         sgx_ineffective(())
  88     }
  89
  90     pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
  91         sgx_ineffective(None)
  92     }
  93
  94     pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
  95         sgx_ineffective(None)
  96     }
  97
  98     pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
  99         Ok(0)
 100     }
 101
 102     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
 103         self.inner.inner.read(buf)
 104     }
 105
 106     pub fn read_vectored(&self, buf: &mut [IoVecMut<'_>]) -> io::Result<usize> {
 107         let buf = match buf.get_mut(0) {
 108             Some(buf) => buf,
 109             None => return Ok(0),
 110         };
 111         self.read(buf)
 112     }
 113
 114     pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
 115         self.inner.inner.write(buf)
 116     }
 117
 118     pub fn write_vectored(&self, buf: &[IoVec<'_>]) -> io::Result<usize> {
 119         let buf = match buf.get(0) {
 120             Some(buf) => buf,
 121             None => return Ok(0),
 122         };
 123         self.write(buf)
 124     }
 125
 126     pub fn peer_addr(&self) -> io::Result<SocketAddr> {
 127         addr_to_sockaddr(&self.peer_addr)
 128     }
 129
 130     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
 131         addr_to_sockaddr(&self.inner.local_addr)
 132     }
 133
 134     pub fn shutdown(&self, _: Shutdown) -> io::Result<()> {
 135         sgx_ineffective(())
 136     }
 137
 138     pub fn duplicate(&self) -> io::Result<TcpStream> {
 139         Ok(self.clone())
 140     }
 141
 142     pub fn set_nodelay(&self, _: bool) -> io::Result<()> {
 143         sgx_ineffective(())
 144     }
 145
 146     pub fn nodelay(&self) -> io::Result<bool> {
 147         sgx_ineffective(false)
 148     }
 149
 150     pub fn set_ttl(&self, _: u32) -> io::Result<()> {
 151         sgx_ineffective(())
 152     }
 153
 154     pub fn ttl(&self) -> io::Result<u32> {
 155         sgx_ineffective(DEFAULT_FAKE_TTL)
 156     }
 157
 158     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
 159         Ok(None)
 160     }
 161
 162     pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
 163         sgx_ineffective(())
 164     }
 165 }
 166
 167 impl AsInner<Socket> for TcpStream {
 168     fn as_inner(&self) -> &Socket { &self.inner }
 169 }
 170
 171 // `Inner` includes `peer_addr` so that a `TcpStream` maybe correctly
 172 // reconstructed if `Socket::try_into_inner` fails.
 173 impl IntoInner<(Socket, Option<String>)> for TcpStream {
 174     fn into_inner(self) -> (Socket, Option<String>) {
 175         (self.inner, self.peer_addr)
 176     }
 177 }
 178
 179 impl FromInner<(Socket, Option<String>)> for TcpStream {
 180     fn from_inner((inner, peer_addr): (Socket, Option<String>)) -> TcpStream {
 181         TcpStream { inner, peer_addr }
 182     }
 183 }
 184
 185 #[derive(Debug, Clone)]
 186 pub struct TcpListener {
 187     inner: Socket,
 188 }
 189
 190 impl TcpListener {
 191     pub fn bind(addr: io::Result<&SocketAddr>) -> io::Result<TcpListener> {
 192         let addr = io_err_to_addr(addr)?;
 193         let (fd, local_addr) = usercalls::bind_stream(&addr)?;
 194         Ok(TcpListener { inner: Socket::new(fd, local_addr) })
 195     }
 196
 197     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
 198         addr_to_sockaddr(&self.inner.local_addr)
 199     }
 200
 201     pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
 202         let (fd, local_addr, peer_addr) = usercalls::accept_stream(self.inner.inner.raw())?;
 203         let peer_addr = Some(peer_addr);
 204         let ret_peer = addr_to_sockaddr(&peer_addr).unwrap_or_else(|_| ([0; 4], 0).into());
 205         Ok((TcpStream { inner: Socket::new(fd, local_addr), peer_addr }, ret_peer))
 206     }
 207
 208     pub fn duplicate(&self) -> io::Result<TcpListener> {
 209         Ok(self.clone())
 210     }
 211
 212     pub fn set_ttl(&self, _: u32) -> io::Result<()> {
 213         sgx_ineffective(())
 214     }
 215
 216     pub fn ttl(&self) -> io::Result<u32> {
 217         sgx_ineffective(DEFAULT_FAKE_TTL)
 218     }
 219
 220     pub fn set_only_v6(&self, _: bool) -> io::Result<()> {
 221         sgx_ineffective(())
 222     }
 223
 224     pub fn only_v6(&self) -> io::Result<bool> {
 225         sgx_ineffective(false)
 226     }
 227
 228     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
 229         Ok(None)
 230     }
 231
 232     pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
 233         sgx_ineffective(())
 234     }
 235 }
 236
 237 impl AsInner<Socket> for TcpListener {
 238     fn as_inner(&self) -> &Socket { &self.inner }
 239 }
 240
 241 impl IntoInner<Socket> for TcpListener {
 242     fn into_inner(self) -> Socket {
 243         self.inner
 244     }
 245 }
 246
 247 impl FromInner<Socket> for TcpListener {
 248     fn from_inner(inner: Socket) -> TcpListener {
 249         TcpListener { inner }
 250     }
 251 }
 252
 253 pub struct UdpSocket(Void);
 254
 255 impl UdpSocket {
 256     pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<UdpSocket> {
 257         unsupported()
 258     }
 259
 260     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
 261         match self.0 {}
 262     }
 263
 264     pub fn recv_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
 265         match self.0 {}
 266     }
 267
 268     pub fn peek_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
 269         match self.0 {}
 270     }
 271
 272     pub fn send_to(&self, _: &[u8], _: &SocketAddr) -> io::Result<usize> {
 273         match self.0 {}
 274     }
 275
 276     pub fn duplicate(&self) -> io::Result<UdpSocket> {
 277         match self.0 {}
 278     }
 279
 280     pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
 281         match self.0 {}
 282     }
 283
 284     pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
 285         match self.0 {}
 286     }
 287
 288     pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
 289         match self.0 {}
 290     }
 291
 292     pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
 293         match self.0 {}
 294     }
 295
 296     pub fn set_broadcast(&self, _: bool) -> io::Result<()> {
 297         match self.0 {}
 298     }
 299
 300     pub fn broadcast(&self) -> io::Result<bool> {
 301         match self.0 {}
 302     }
 303
 304     pub fn set_multicast_loop_v4(&self, _: bool) -> io::Result<()> {
 305         match self.0 {}
 306     }
 307
 308     pub fn multicast_loop_v4(&self) -> io::Result<bool> {
 309         match self.0 {}
 310     }
 311
 312     pub fn set_multicast_ttl_v4(&self, _: u32) -> io::Result<()> {
 313         match self.0 {}
 314     }
 315
 316     pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
 317         match self.0 {}
 318     }
 319
 320     pub fn set_multicast_loop_v6(&self, _: bool) -> io::Result<()> {
 321         match self.0 {}
 322     }
 323
 324     pub fn multicast_loop_v6(&self) -> io::Result<bool> {
 325         match self.0 {}
 326     }
 327
 328     pub fn join_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr)
 329                          -> io::Result<()> {
 330         match self.0 {}
 331     }
 332
 333     pub fn join_multicast_v6(&self, _: &Ipv6Addr, _: u32)
 334                          -> io::Result<()> {
 335         match self.0 {}
 336     }
 337
 338     pub fn leave_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr)
 339                           -> io::Result<()> {
 340         match self.0 {}
 341     }
 342
 343     pub fn leave_multicast_v6(&self, _: &Ipv6Addr, _: u32)
 344                           -> io::Result<()> {
 345         match self.0 {}
 346     }
 347
 348     pub fn set_ttl(&self, _: u32) -> io::Result<()> {
 349         match self.0 {}
 350     }
 351
 352     pub fn ttl(&self) -> io::Result<u32> {
 353         match self.0 {}
 354     }
 355
 356     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
 357         match self.0 {}
 358     }
 359
 360     pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
 361         match self.0 {}
 362     }
 363
 364     pub fn recv(&self, _: &mut [u8]) -> io::Result<usize> {
 365         match self.0 {}
 366     }
 367
 368     pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
 369         match self.0 {}
 370     }
 371
 372     pub fn send(&self, _: &[u8]) -> io::Result<usize> {
 373         match self.0 {}
 374     }
 375
 376     pub fn connect(&self, _: io::Result<&SocketAddr>) -> io::Result<()> {
 377         match self.0 {}
 378     }
 379 }
 380
 381 impl fmt::Debug for UdpSocket {
 382     fn fmt(&self, _f: &mut fmt::Formatter) -> fmt::Result {
 383         match self.0 {}
 384     }
 385 }
 386
 387 #[derive(Debug)]
 388 pub struct NonIpSockAddr {
 389     host: String
 390 }
 391
 392 impl error::Error for NonIpSockAddr {
 393     fn description(&self) -> &str {
 394         "Failed to convert address to SocketAddr"
 395     }
 396 }
 397
 398 impl fmt::Display for NonIpSockAddr {
 399     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 400         write!(f, "Failed to convert address to SocketAddr: {}", self.host)
 401     }
 402 }
 403
 404 pub struct LookupHost(Void);
 405
 406 impl LookupHost {
 407     fn new(host: String) -> io::Result<LookupHost> {
 408         Err(io::Error::new(io::ErrorKind::Other, NonIpSockAddr { host }))
 409     }
 410
 411     pub fn port(&self) -> u16 {
 412         match self.0 {}
 413     }
 414 }
 415
 416 impl Iterator for LookupHost {
 417     type Item = SocketAddr;
 418     fn next(&mut self) -> Option<SocketAddr> {
 419         match self.0 {}
 420     }
 421 }
 422
 423 impl<'a> TryFrom<&'a str> for LookupHost {
 424     type Error = io::Error;
 425
 426     fn try_from(v: &'a str) -> io::Result<LookupHost> {
 427         LookupHost::new(v.to_owned())
 428     }
 429 }
 430
 431 impl<'a> TryFrom<(&'a str, u16)> for LookupHost {
 432     type Error = io::Error;
 433
 434     fn try_from((host, port): (&'a str, u16)) -> io::Result<LookupHost> {
 435         LookupHost::new(format!("{}:{}", host, port))
 436     }
 437 }
 438
 439 #[allow(bad_style)]
 440 pub mod netc {
 441     pub const AF_INET: u8 = 0;
 442     pub const AF_INET6: u8 = 1;
 443     pub type sa_family_t = u8;
 444
 445     #[derive(Copy, Clone)]
 446     pub struct in_addr {
 447         pub s_addr: u32,
 448     }
 449
 450     #[derive(Copy, Clone)]
 451     pub struct sockaddr_in {
 452         pub sin_family: sa_family_t,
 453         pub sin_port: u16,
 454         pub sin_addr: in_addr,
 455     }
 456
 457     #[derive(Copy, Clone)]
 458     pub struct in6_addr {
 459         pub s6_addr: [u8; 16],
 460     }
 461
 462     #[derive(Copy, Clone)]
 463     pub struct sockaddr_in6 {
 464         pub sin6_family: sa_family_t,
 465         pub sin6_port: u16,
 466         pub sin6_addr: in6_addr,
 467         pub sin6_flowinfo: u32,
 468         pub sin6_scope_id: u32,
 469     }
 470
 471     #[derive(Copy, Clone)]
 472     pub struct sockaddr {
 473     }
 474
 475     pub type socklen_t = usize;
 476 }