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-rw-r--r--library/std/src/sys/windows/net.rs438
1 files changed, 438 insertions, 0 deletions
diff --git a/library/std/src/sys/windows/net.rs b/library/std/src/sys/windows/net.rs
new file mode 100644
index 00000000000..9e74454bc23
--- /dev/null
+++ b/library/std/src/sys/windows/net.rs
@@ -0,0 +1,438 @@
+#![unstable(issue = "none", feature = "windows_net")]
+
+use crate::cmp;
+use crate::io::{self, IoSlice, IoSliceMut, Read};
+use crate::mem;
+use crate::net::{Shutdown, SocketAddr};
+use crate::ptr;
+use crate::sync::Once;
+use crate::sys;
+use crate::sys::c;
+use crate::sys_common::net;
+use crate::sys_common::{self, AsInner, FromInner, IntoInner};
+use crate::time::Duration;
+
+use libc::{c_int, c_long, c_ulong, c_void};
+
+pub type wrlen_t = i32;
+
+pub mod netc {
+ pub use crate::sys::c::ADDRESS_FAMILY as sa_family_t;
+ pub use crate::sys::c::ADDRINFOA as addrinfo;
+ pub use crate::sys::c::SOCKADDR as sockaddr;
+ pub use crate::sys::c::SOCKADDR_STORAGE_LH as sockaddr_storage;
+ pub use crate::sys::c::*;
+}
+
+pub struct Socket(c::SOCKET);
+
+/// Checks whether the Windows socket interface has been started already, and
+/// if not, starts it.
+pub fn init() {
+ static START: Once = Once::new();
+
+ START.call_once(|| unsafe {
+ let mut data: c::WSADATA = mem::zeroed();
+ let ret = c::WSAStartup(
+ 0x202, // version 2.2
+ &mut data,
+ );
+ assert_eq!(ret, 0);
+
+ let _ = sys_common::at_exit(|| {
+ c::WSACleanup();
+ });
+ });
+}
+
+/// Returns the last error from the Windows socket interface.
+fn last_error() -> io::Error {
+ io::Error::from_raw_os_error(unsafe { c::WSAGetLastError() })
+}
+
+#[doc(hidden)]
+pub trait IsMinusOne {
+ fn is_minus_one(&self) -> bool;
+}
+
+macro_rules! impl_is_minus_one {
+ ($($t:ident)*) => ($(impl IsMinusOne for $t {
+ fn is_minus_one(&self) -> bool {
+ *self == -1
+ }
+ })*)
+}
+
+impl_is_minus_one! { i8 i16 i32 i64 isize }
+
+/// Checks if the signed integer is the Windows constant `SOCKET_ERROR` (-1)
+/// and if so, returns the last error from the Windows socket interface. This
+/// function must be called before another call to the socket API is made.
+pub fn cvt<T: IsMinusOne>(t: T) -> io::Result<T> {
+ if t.is_minus_one() { Err(last_error()) } else { Ok(t) }
+}
+
+/// A variant of `cvt` for `getaddrinfo` which return 0 for a success.
+pub fn cvt_gai(err: c_int) -> io::Result<()> {
+ if err == 0 { Ok(()) } else { Err(last_error()) }
+}
+
+/// Just to provide the same interface as sys/unix/net.rs
+pub fn cvt_r<T, F>(mut f: F) -> io::Result<T>
+where
+ T: IsMinusOne,
+ F: FnMut() -> T,
+{
+ cvt(f())
+}
+
+impl Socket {
+ pub fn new(addr: &SocketAddr, ty: c_int) -> io::Result<Socket> {
+ let fam = match *addr {
+ SocketAddr::V4(..) => c::AF_INET,
+ SocketAddr::V6(..) => c::AF_INET6,
+ };
+ let socket = unsafe {
+ match c::WSASocketW(
+ fam,
+ ty,
+ 0,
+ ptr::null_mut(),
+ 0,
+ c::WSA_FLAG_OVERLAPPED | c::WSA_FLAG_NO_HANDLE_INHERIT,
+ ) {
+ c::INVALID_SOCKET => match c::WSAGetLastError() {
+ c::WSAEPROTOTYPE | c::WSAEINVAL => {
+ match c::WSASocketW(fam, ty, 0, ptr::null_mut(), 0, c::WSA_FLAG_OVERLAPPED)
+ {
+ c::INVALID_SOCKET => Err(last_error()),
+ n => {
+ let s = Socket(n);
+ s.set_no_inherit()?;
+ Ok(s)
+ }
+ }
+ }
+ n => Err(io::Error::from_raw_os_error(n)),
+ },
+ n => Ok(Socket(n)),
+ }
+ }?;
+ Ok(socket)
+ }
+
+ pub fn connect_timeout(&self, addr: &SocketAddr, timeout: Duration) -> io::Result<()> {
+ self.set_nonblocking(true)?;
+ let r = unsafe {
+ let (addrp, len) = addr.into_inner();
+ cvt(c::connect(self.0, addrp, len))
+ };
+ self.set_nonblocking(false)?;
+
+ match r {
+ Ok(_) => return Ok(()),
+ Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {}
+ Err(e) => return Err(e),
+ }
+
+ if timeout.as_secs() == 0 && timeout.subsec_nanos() == 0 {
+ return Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "cannot set a 0 duration timeout",
+ ));
+ }
+
+ let mut timeout = c::timeval {
+ tv_sec: timeout.as_secs() as c_long,
+ tv_usec: (timeout.subsec_nanos() / 1000) as c_long,
+ };
+ if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
+ timeout.tv_usec = 1;
+ }
+
+ let fds = unsafe {
+ let mut fds = mem::zeroed::<c::fd_set>();
+ fds.fd_count = 1;
+ fds.fd_array[0] = self.0;
+ fds
+ };
+
+ let mut writefds = fds;
+ let mut errorfds = fds;
+
+ let n =
+ unsafe { cvt(c::select(1, ptr::null_mut(), &mut writefds, &mut errorfds, &timeout))? };
+
+ match n {
+ 0 => Err(io::Error::new(io::ErrorKind::TimedOut, "connection timed out")),
+ _ => {
+ if writefds.fd_count != 1 {
+ if let Some(e) = self.take_error()? {
+ return Err(e);
+ }
+ }
+ Ok(())
+ }
+ }
+ }
+
+ pub fn accept(&self, storage: *mut c::SOCKADDR, len: *mut c_int) -> io::Result<Socket> {
+ let socket = unsafe {
+ match c::accept(self.0, storage, len) {
+ c::INVALID_SOCKET => Err(last_error()),
+ n => Ok(Socket(n)),
+ }
+ }?;
+ Ok(socket)
+ }
+
+ pub fn duplicate(&self) -> io::Result<Socket> {
+ let socket = unsafe {
+ let mut info: c::WSAPROTOCOL_INFO = mem::zeroed();
+ cvt(c::WSADuplicateSocketW(self.0, c::GetCurrentProcessId(), &mut info))?;
+
+ match c::WSASocketW(
+ info.iAddressFamily,
+ info.iSocketType,
+ info.iProtocol,
+ &mut info,
+ 0,
+ c::WSA_FLAG_OVERLAPPED | c::WSA_FLAG_NO_HANDLE_INHERIT,
+ ) {
+ c::INVALID_SOCKET => match c::WSAGetLastError() {
+ c::WSAEPROTOTYPE | c::WSAEINVAL => {
+ match c::WSASocketW(
+ info.iAddressFamily,
+ info.iSocketType,
+ info.iProtocol,
+ &mut info,
+ 0,
+ c::WSA_FLAG_OVERLAPPED,
+ ) {
+ c::INVALID_SOCKET => Err(last_error()),
+ n => {
+ let s = Socket(n);
+ s.set_no_inherit()?;
+ Ok(s)
+ }
+ }
+ }
+ n => Err(io::Error::from_raw_os_error(n)),
+ },
+ n => Ok(Socket(n)),
+ }
+ }?;
+ Ok(socket)
+ }
+
+ fn recv_with_flags(&self, buf: &mut [u8], flags: c_int) -> io::Result<usize> {
+ // On unix when a socket is shut down all further reads return 0, so we
+ // do the same on windows to map a shut down socket to returning EOF.
+ let len = cmp::min(buf.len(), i32::MAX as usize) as i32;
+ unsafe {
+ match c::recv(self.0, buf.as_mut_ptr() as *mut c_void, len, flags) {
+ -1 if c::WSAGetLastError() == c::WSAESHUTDOWN => Ok(0),
+ -1 => Err(last_error()),
+ n => Ok(n as usize),
+ }
+ }
+ }
+
+ pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.recv_with_flags(buf, 0)
+ }
+
+ pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ // On unix when a socket is shut down all further reads return 0, so we
+ // do the same on windows to map a shut down socket to returning EOF.
+ let len = cmp::min(bufs.len(), c::DWORD::MAX as usize) as c::DWORD;
+ let mut nread = 0;
+ let mut flags = 0;
+ unsafe {
+ let ret = c::WSARecv(
+ self.0,
+ bufs.as_mut_ptr() as *mut c::WSABUF,
+ len,
+ &mut nread,
+ &mut flags,
+ ptr::null_mut(),
+ ptr::null_mut(),
+ );
+ match ret {
+ 0 => Ok(nread as usize),
+ _ if c::WSAGetLastError() == c::WSAESHUTDOWN => Ok(0),
+ _ => Err(last_error()),
+ }
+ }
+ }
+
+ #[inline]
+ pub fn is_read_vectored(&self) -> bool {
+ true
+ }
+
+ pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.recv_with_flags(buf, c::MSG_PEEK)
+ }
+
+ fn recv_from_with_flags(
+ &self,
+ buf: &mut [u8],
+ flags: c_int,
+ ) -> io::Result<(usize, SocketAddr)> {
+ let mut storage: c::SOCKADDR_STORAGE_LH = unsafe { mem::zeroed() };
+ let mut addrlen = mem::size_of_val(&storage) as c::socklen_t;
+ let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t;
+
+ // On unix when a socket is shut down all further reads return 0, so we
+ // do the same on windows to map a shut down socket to returning EOF.
+ unsafe {
+ match c::recvfrom(
+ self.0,
+ buf.as_mut_ptr() as *mut c_void,
+ len,
+ flags,
+ &mut storage as *mut _ as *mut _,
+ &mut addrlen,
+ ) {
+ -1 if c::WSAGetLastError() == c::WSAESHUTDOWN => {
+ Ok((0, net::sockaddr_to_addr(&storage, addrlen as usize)?))
+ }
+ -1 => Err(last_error()),
+ n => Ok((n as usize, net::sockaddr_to_addr(&storage, addrlen as usize)?)),
+ }
+ }
+ }
+
+ pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+ self.recv_from_with_flags(buf, 0)
+ }
+
+ pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+ self.recv_from_with_flags(buf, c::MSG_PEEK)
+ }
+
+ pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ let len = cmp::min(bufs.len(), c::DWORD::MAX as usize) as c::DWORD;
+ let mut nwritten = 0;
+ unsafe {
+ cvt(c::WSASend(
+ self.0,
+ bufs.as_ptr() as *const c::WSABUF as *mut c::WSABUF,
+ len,
+ &mut nwritten,
+ 0,
+ ptr::null_mut(),
+ ptr::null_mut(),
+ ))?;
+ }
+ Ok(nwritten as usize)
+ }
+
+ #[inline]
+ pub fn is_write_vectored(&self) -> bool {
+ true
+ }
+
+ pub fn set_timeout(&self, dur: Option<Duration>, kind: c_int) -> io::Result<()> {
+ let timeout = match dur {
+ Some(dur) => {
+ let timeout = sys::dur2timeout(dur);
+ if timeout == 0 {
+ return Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "cannot set a 0 duration timeout",
+ ));
+ }
+ timeout
+ }
+ None => 0,
+ };
+ net::setsockopt(self, c::SOL_SOCKET, kind, timeout)
+ }
+
+ pub fn timeout(&self, kind: c_int) -> io::Result<Option<Duration>> {
+ let raw: c::DWORD = net::getsockopt(self, c::SOL_SOCKET, kind)?;
+ if raw == 0 {
+ Ok(None)
+ } else {
+ let secs = raw / 1000;
+ let nsec = (raw % 1000) * 1000000;
+ Ok(Some(Duration::new(secs as u64, nsec as u32)))
+ }
+ }
+
+ #[cfg(not(target_vendor = "uwp"))]
+ fn set_no_inherit(&self) -> io::Result<()> {
+ sys::cvt(unsafe { c::SetHandleInformation(self.0 as c::HANDLE, c::HANDLE_FLAG_INHERIT, 0) })
+ .map(drop)
+ }
+
+ #[cfg(target_vendor = "uwp")]
+ fn set_no_inherit(&self) -> io::Result<()> {
+ Err(io::Error::new(io::ErrorKind::Other, "Unavailable on UWP"))
+ }
+
+ pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+ let how = match how {
+ Shutdown::Write => c::SD_SEND,
+ Shutdown::Read => c::SD_RECEIVE,
+ Shutdown::Both => c::SD_BOTH,
+ };
+ cvt(unsafe { c::shutdown(self.0, how) })?;
+ Ok(())
+ }
+
+ pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
+ let mut nonblocking = nonblocking as c_ulong;
+ let r = unsafe { c::ioctlsocket(self.0, c::FIONBIO as c_int, &mut nonblocking) };
+ if r == 0 { Ok(()) } else { Err(io::Error::last_os_error()) }
+ }
+
+ pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
+ net::setsockopt(self, c::IPPROTO_TCP, c::TCP_NODELAY, nodelay as c::BYTE)
+ }
+
+ pub fn nodelay(&self) -> io::Result<bool> {
+ let raw: c::BYTE = net::getsockopt(self, c::IPPROTO_TCP, c::TCP_NODELAY)?;
+ Ok(raw != 0)
+ }
+
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ let raw: c_int = net::getsockopt(self, c::SOL_SOCKET, c::SO_ERROR)?;
+ if raw == 0 { Ok(None) } else { Ok(Some(io::Error::from_raw_os_error(raw as i32))) }
+ }
+}
+
+#[unstable(reason = "not public", issue = "none", feature = "fd_read")]
+impl<'a> Read for &'a Socket {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ (**self).read(buf)
+ }
+}
+
+impl Drop for Socket {
+ fn drop(&mut self) {
+ let _ = unsafe { c::closesocket(self.0) };
+ }
+}
+
+impl AsInner<c::SOCKET> for Socket {
+ fn as_inner(&self) -> &c::SOCKET {
+ &self.0
+ }
+}
+
+impl FromInner<c::SOCKET> for Socket {
+ fn from_inner(sock: c::SOCKET) -> Socket {
+ Socket(sock)
+ }
+}
+
+impl IntoInner<c::SOCKET> for Socket {
+ fn into_inner(self) -> c::SOCKET {
+ let ret = self.0;
+ mem::forget(self);
+ ret
+ }
+}
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