1 #![unstable(issue = "none", feature = "windows_net")]
4 use crate::io::{self, IoSlice, IoSliceMut, Read};
6 use crate::net::{Shutdown, SocketAddr};
11 use crate::sys_common::net;
12 use crate::sys_common::{self, AsInner, FromInner, IntoInner};
13 use crate::time::Duration;
15 use libc::{c_int, c_long, c_ulong, c_void};
17 pub type wrlen_t = i32;
20 pub use crate::sys::c::ADDRESS_FAMILY as sa_family_t;
21 pub use crate::sys::c::ADDRINFOA as addrinfo;
22 pub use crate::sys::c::SOCKADDR as sockaddr;
23 pub use crate::sys::c::SOCKADDR_STORAGE_LH as sockaddr_storage;
24 pub use crate::sys::c::*;
27 pub struct Socket(c::SOCKET);
29 /// Checks whether the Windows socket interface has been started already, and
30 /// if not, starts it.
32 static START: Once = Once::new();
34 START.call_once(|| unsafe {
35 let mut data: c::WSADATA = mem::zeroed();
36 let ret = c::WSAStartup(
42 let _ = sys_common::at_exit(|| {
48 /// Returns the last error from the Windows socket interface.
49 fn last_error() -> io::Error {
50 io::Error::from_raw_os_error(unsafe { c::WSAGetLastError() })
54 pub trait IsMinusOne {
55 fn is_minus_one(&self) -> bool;
58 macro_rules! impl_is_minus_one {
59 ($($t:ident)*) => ($(impl IsMinusOne for $t {
60 fn is_minus_one(&self) -> bool {
66 impl_is_minus_one! { i8 i16 i32 i64 isize }
68 /// Checks if the signed integer is the Windows constant `SOCKET_ERROR` (-1)
69 /// and if so, returns the last error from the Windows socket interface. This
70 /// function must be called before another call to the socket API is made.
71 pub fn cvt<T: IsMinusOne>(t: T) -> io::Result<T> {
72 if t.is_minus_one() { Err(last_error()) } else { Ok(t) }
75 /// A variant of `cvt` for `getaddrinfo` which return 0 for a success.
76 pub fn cvt_gai(err: c_int) -> io::Result<()> {
77 if err == 0 { Ok(()) } else { Err(last_error()) }
80 /// Just to provide the same interface as sys/unix/net.rs
81 pub fn cvt_r<T, F>(mut f: F) -> io::Result<T>
90 pub fn new(addr: &SocketAddr, ty: c_int) -> io::Result<Socket> {
91 let fam = match *addr {
92 SocketAddr::V4(..) => c::AF_INET,
93 SocketAddr::V6(..) => c::AF_INET6,
102 c::WSA_FLAG_OVERLAPPED | c::WSA_FLAG_NO_HANDLE_INHERIT,
104 c::INVALID_SOCKET => match c::WSAGetLastError() {
105 c::WSAEPROTOTYPE | c::WSAEINVAL => {
106 match c::WSASocketW(fam, ty, 0, ptr::null_mut(), 0, c::WSA_FLAG_OVERLAPPED)
108 c::INVALID_SOCKET => Err(last_error()),
116 n => Err(io::Error::from_raw_os_error(n)),
124 pub fn connect_timeout(&self, addr: &SocketAddr, timeout: Duration) -> io::Result<()> {
125 self.set_nonblocking(true)?;
127 let (addrp, len) = addr.into_inner();
128 cvt(c::connect(self.0, addrp, len))
130 self.set_nonblocking(false)?;
133 Ok(_) => return Ok(()),
134 Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {}
135 Err(e) => return Err(e),
138 if timeout.as_secs() == 0 && timeout.subsec_nanos() == 0 {
139 return Err(io::Error::new_const(
140 io::ErrorKind::InvalidInput,
141 &"cannot set a 0 duration timeout",
145 let mut timeout = c::timeval {
146 tv_sec: timeout.as_secs() as c_long,
147 tv_usec: (timeout.subsec_nanos() / 1000) as c_long,
149 if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
154 let mut fds = mem::zeroed::<c::fd_set>();
156 fds.fd_array[0] = self.0;
160 let mut writefds = fds;
161 let mut errorfds = fds;
164 unsafe { cvt(c::select(1, ptr::null_mut(), &mut writefds, &mut errorfds, &timeout))? };
167 0 => Err(io::Error::new_const(io::ErrorKind::TimedOut, &"connection timed out")),
169 if writefds.fd_count != 1 {
170 if let Some(e) = self.take_error()? {
179 pub fn accept(&self, storage: *mut c::SOCKADDR, len: *mut c_int) -> io::Result<Socket> {
180 let socket = unsafe {
181 match c::accept(self.0, storage, len) {
182 c::INVALID_SOCKET => Err(last_error()),
189 pub fn duplicate(&self) -> io::Result<Socket> {
190 let socket = unsafe {
191 let mut info: c::WSAPROTOCOL_INFO = mem::zeroed();
192 cvt(c::WSADuplicateSocketW(self.0, c::GetCurrentProcessId(), &mut info))?;
200 c::WSA_FLAG_OVERLAPPED | c::WSA_FLAG_NO_HANDLE_INHERIT,
202 c::INVALID_SOCKET => match c::WSAGetLastError() {
203 c::WSAEPROTOTYPE | c::WSAEINVAL => {
210 c::WSA_FLAG_OVERLAPPED,
212 c::INVALID_SOCKET => Err(last_error()),
220 n => Err(io::Error::from_raw_os_error(n)),
228 fn recv_with_flags(&self, buf: &mut [u8], flags: c_int) -> io::Result<usize> {
229 // On unix when a socket is shut down all further reads return 0, so we
230 // do the same on windows to map a shut down socket to returning EOF.
231 let len = cmp::min(buf.len(), i32::MAX as usize) as i32;
233 match c::recv(self.0, buf.as_mut_ptr() as *mut c_void, len, flags) {
234 -1 if c::WSAGetLastError() == c::WSAESHUTDOWN => Ok(0),
235 -1 => Err(last_error()),
241 pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
242 self.recv_with_flags(buf, 0)
245 pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
246 // On unix when a socket is shut down all further reads return 0, so we
247 // do the same on windows to map a shut down socket to returning EOF.
248 let len = cmp::min(bufs.len(), c::DWORD::MAX as usize) as c::DWORD;
252 let ret = c::WSARecv(
254 bufs.as_mut_ptr() as *mut c::WSABUF,
262 0 => Ok(nread as usize),
263 _ if c::WSAGetLastError() == c::WSAESHUTDOWN => Ok(0),
264 _ => Err(last_error()),
270 pub fn is_read_vectored(&self) -> bool {
274 pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
275 self.recv_with_flags(buf, c::MSG_PEEK)
278 fn recv_from_with_flags(
282 ) -> io::Result<(usize, SocketAddr)> {
283 let mut storage: c::SOCKADDR_STORAGE_LH = unsafe { mem::zeroed() };
284 let mut addrlen = mem::size_of_val(&storage) as c::socklen_t;
285 let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t;
287 // On unix when a socket is shut down all further reads return 0, so we
288 // do the same on windows to map a shut down socket to returning EOF.
292 buf.as_mut_ptr() as *mut c_void,
295 &mut storage as *mut _ as *mut _,
298 -1 if c::WSAGetLastError() == c::WSAESHUTDOWN => {
299 Ok((0, net::sockaddr_to_addr(&storage, addrlen as usize)?))
301 -1 => Err(last_error()),
302 n => Ok((n as usize, net::sockaddr_to_addr(&storage, addrlen as usize)?)),
307 pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
308 self.recv_from_with_flags(buf, 0)
311 pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
312 self.recv_from_with_flags(buf, c::MSG_PEEK)
315 pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
316 let len = cmp::min(bufs.len(), c::DWORD::MAX as usize) as c::DWORD;
317 let mut nwritten = 0;
321 bufs.as_ptr() as *const c::WSABUF as *mut c::WSABUF,
329 Ok(nwritten as usize)
333 pub fn is_write_vectored(&self) -> bool {
337 pub fn set_timeout(&self, dur: Option<Duration>, kind: c_int) -> io::Result<()> {
338 let timeout = match dur {
340 let timeout = sys::dur2timeout(dur);
342 return Err(io::Error::new_const(
343 io::ErrorKind::InvalidInput,
344 &"cannot set a 0 duration timeout",
351 net::setsockopt(self, c::SOL_SOCKET, kind, timeout)
354 pub fn timeout(&self, kind: c_int) -> io::Result<Option<Duration>> {
355 let raw: c::DWORD = net::getsockopt(self, c::SOL_SOCKET, kind)?;
359 let secs = raw / 1000;
360 let nsec = (raw % 1000) * 1000000;
361 Ok(Some(Duration::new(secs as u64, nsec as u32)))
365 #[cfg(not(target_vendor = "uwp"))]
366 fn set_no_inherit(&self) -> io::Result<()> {
367 sys::cvt(unsafe { c::SetHandleInformation(self.0 as c::HANDLE, c::HANDLE_FLAG_INHERIT, 0) })
371 #[cfg(target_vendor = "uwp")]
372 fn set_no_inherit(&self) -> io::Result<()> {
373 Err(io::Error::new_const(io::ErrorKind::Other, &"Unavailable on UWP"))
376 pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
377 let how = match how {
378 Shutdown::Write => c::SD_SEND,
379 Shutdown::Read => c::SD_RECEIVE,
380 Shutdown::Both => c::SD_BOTH,
382 cvt(unsafe { c::shutdown(self.0, how) })?;
386 pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
387 let mut nonblocking = nonblocking as c_ulong;
388 let r = unsafe { c::ioctlsocket(self.0, c::FIONBIO as c_int, &mut nonblocking) };
389 if r == 0 { Ok(()) } else { Err(io::Error::last_os_error()) }
392 pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
393 net::setsockopt(self, c::IPPROTO_TCP, c::TCP_NODELAY, nodelay as c::BYTE)
396 pub fn nodelay(&self) -> io::Result<bool> {
397 let raw: c::BYTE = net::getsockopt(self, c::IPPROTO_TCP, c::TCP_NODELAY)?;
401 pub fn take_error(&self) -> io::Result<Option<io::Error>> {
402 let raw: c_int = net::getsockopt(self, c::SOL_SOCKET, c::SO_ERROR)?;
403 if raw == 0 { Ok(None) } else { Ok(Some(io::Error::from_raw_os_error(raw as i32))) }
407 #[unstable(reason = "not public", issue = "none", feature = "fd_read")]
408 impl<'a> Read for &'a Socket {
409 fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
414 impl Drop for Socket {
416 let _ = unsafe { c::closesocket(self.0) };
420 impl AsInner<c::SOCKET> for Socket {
421 fn as_inner(&self) -> &c::SOCKET {
426 impl FromInner<c::SOCKET> for Socket {
427 fn from_inner(sock: c::SOCKET) -> Socket {
432 impl IntoInner<c::SOCKET> for Socket {
433 fn into_inner(self) -> c::SOCKET {