diff options
Diffstat (limited to 'third_party/rust/mio/src/net/tcp')
| -rw-r--r-- | third_party/rust/mio/src/net/tcp/listener.rs | 217 | ||||
| -rw-r--r-- | third_party/rust/mio/src/net/tcp/mod.rs | 5 | ||||
| -rw-r--r-- | third_party/rust/mio/src/net/tcp/stream.rs | 334 |
3 files changed, 556 insertions, 0 deletions
diff --git a/third_party/rust/mio/src/net/tcp/listener.rs b/third_party/rust/mio/src/net/tcp/listener.rs new file mode 100644 index 0000000000..21bffbaffc --- /dev/null +++ b/third_party/rust/mio/src/net/tcp/listener.rs @@ -0,0 +1,217 @@ +use std::net::{self, SocketAddr}; +#[cfg(unix)] +use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd}; +#[cfg(windows)] +use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket}; +use std::{fmt, io}; + +use crate::io_source::IoSource; +use crate::net::TcpStream; +#[cfg(unix)] +use crate::sys::tcp::set_reuseaddr; +use crate::sys::tcp::{bind, listen, new_for_addr}; +use crate::{event, sys, Interest, Registry, Token}; + +/// A structure representing a socket server +/// +/// # Examples +/// +#[cfg_attr(feature = "os-poll", doc = "```")] +#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")] +/// # use std::error::Error; +/// # fn main() -> Result<(), Box<dyn Error>> { +/// use mio::{Events, Interest, Poll, Token}; +/// use mio::net::TcpListener; +/// use std::time::Duration; +/// +/// let mut listener = TcpListener::bind("127.0.0.1:34255".parse()?)?; +/// +/// let mut poll = Poll::new()?; +/// let mut events = Events::with_capacity(128); +/// +/// // Register the socket with `Poll` +/// poll.registry().register(&mut listener, Token(0), Interest::READABLE)?; +/// +/// poll.poll(&mut events, Some(Duration::from_millis(100)))?; +/// +/// // There may be a socket ready to be accepted +/// # Ok(()) +/// # } +/// ``` +pub struct TcpListener { + inner: IoSource<net::TcpListener>, +} + +impl TcpListener { + /// Convenience method to bind a new TCP listener to the specified address + /// to receive new connections. + /// + /// This function will take the following steps: + /// + /// 1. Create a new TCP socket. + /// 2. Set the `SO_REUSEADDR` option on the socket on Unix. + /// 3. Bind the socket to the specified address. + /// 4. Calls `listen` on the socket to prepare it to receive new connections. + pub fn bind(addr: SocketAddr) -> io::Result<TcpListener> { + let socket = new_for_addr(addr)?; + #[cfg(unix)] + let listener = unsafe { TcpListener::from_raw_fd(socket) }; + #[cfg(windows)] + let listener = unsafe { TcpListener::from_raw_socket(socket as _) }; + + // On platforms with Berkeley-derived sockets, this allows to quickly + // rebind a socket, without needing to wait for the OS to clean up the + // previous one. + // + // On Windows, this allows rebinding sockets which are actively in use, + // which allows “socket hijacking”, so we explicitly don't set it here. + // https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse + #[cfg(not(windows))] + set_reuseaddr(&listener.inner, true)?; + + bind(&listener.inner, addr)?; + listen(&listener.inner, 1024)?; + Ok(listener) + } + + /// Creates a new `TcpListener` from a standard `net::TcpListener`. + /// + /// This function is intended to be used to wrap a TCP listener from the + /// standard library in the Mio equivalent. The conversion assumes nothing + /// about the underlying listener; ; it is left up to the user to set it + /// in non-blocking mode. + pub fn from_std(listener: net::TcpListener) -> TcpListener { + TcpListener { + inner: IoSource::new(listener), + } + } + + /// Accepts a new `TcpStream`. + /// + /// This may return an `Err(e)` where `e.kind()` is + /// `io::ErrorKind::WouldBlock`. This means a stream may be ready at a later + /// point and one should wait for an event before calling `accept` again. + /// + /// If an accepted stream is returned, the remote address of the peer is + /// returned along with it. + pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> { + self.inner.do_io(|inner| { + sys::tcp::accept(inner).map(|(stream, addr)| (TcpStream::from_std(stream), addr)) + }) + } + + /// Returns the local socket address of this listener. + pub fn local_addr(&self) -> io::Result<SocketAddr> { + self.inner.local_addr() + } + + /// Sets the value for the `IP_TTL` option on this socket. + /// + /// This value sets the time-to-live field that is used in every packet sent + /// from this socket. + pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { + self.inner.set_ttl(ttl) + } + + /// Gets the value of the `IP_TTL` option for this socket. + /// + /// For more information about this option, see [`set_ttl`][link]. + /// + /// [link]: #method.set_ttl + pub fn ttl(&self) -> io::Result<u32> { + self.inner.ttl() + } + + /// Get the value of the `SO_ERROR` option on this socket. + /// + /// This will retrieve the stored error in the underlying socket, clearing + /// the field in the process. This can be useful for checking errors between + /// calls. + pub fn take_error(&self) -> io::Result<Option<io::Error>> { + self.inner.take_error() + } +} + +impl event::Source for TcpListener { + fn register( + &mut self, + registry: &Registry, + token: Token, + interests: Interest, + ) -> io::Result<()> { + self.inner.register(registry, token, interests) + } + + fn reregister( + &mut self, + registry: &Registry, + token: Token, + interests: Interest, + ) -> io::Result<()> { + self.inner.reregister(registry, token, interests) + } + + fn deregister(&mut self, registry: &Registry) -> io::Result<()> { + self.inner.deregister(registry) + } +} + +impl fmt::Debug for TcpListener { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + self.inner.fmt(f) + } +} + +#[cfg(unix)] +impl IntoRawFd for TcpListener { + fn into_raw_fd(self) -> RawFd { + self.inner.into_inner().into_raw_fd() + } +} + +#[cfg(unix)] +impl AsRawFd for TcpListener { + fn as_raw_fd(&self) -> RawFd { + self.inner.as_raw_fd() + } +} + +#[cfg(unix)] +impl FromRawFd for TcpListener { + /// Converts a `RawFd` to a `TcpListener`. + /// + /// # Notes + /// + /// The caller is responsible for ensuring that the socket is in + /// non-blocking mode. + unsafe fn from_raw_fd(fd: RawFd) -> TcpListener { + TcpListener::from_std(FromRawFd::from_raw_fd(fd)) + } +} + +#[cfg(windows)] +impl IntoRawSocket for TcpListener { + fn into_raw_socket(self) -> RawSocket { + self.inner.into_inner().into_raw_socket() + } +} + +#[cfg(windows)] +impl AsRawSocket for TcpListener { + fn as_raw_socket(&self) -> RawSocket { + self.inner.as_raw_socket() + } +} + +#[cfg(windows)] +impl FromRawSocket for TcpListener { + /// Converts a `RawSocket` to a `TcpListener`. + /// + /// # Notes + /// + /// The caller is responsible for ensuring that the socket is in + /// non-blocking mode. + unsafe fn from_raw_socket(socket: RawSocket) -> TcpListener { + TcpListener::from_std(FromRawSocket::from_raw_socket(socket)) + } +} diff --git a/third_party/rust/mio/src/net/tcp/mod.rs b/third_party/rust/mio/src/net/tcp/mod.rs new file mode 100644 index 0000000000..94af5c10e8 --- /dev/null +++ b/third_party/rust/mio/src/net/tcp/mod.rs @@ -0,0 +1,5 @@ +mod listener; +pub use self::listener::TcpListener; + +mod stream; +pub use self::stream::TcpStream; diff --git a/third_party/rust/mio/src/net/tcp/stream.rs b/third_party/rust/mio/src/net/tcp/stream.rs new file mode 100644 index 0000000000..029f186b42 --- /dev/null +++ b/third_party/rust/mio/src/net/tcp/stream.rs @@ -0,0 +1,334 @@ +use std::fmt; +use std::io::{self, IoSlice, IoSliceMut, Read, Write}; +use std::net::{self, Shutdown, SocketAddr}; +#[cfg(unix)] +use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd}; +#[cfg(windows)] +use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket}; + +use crate::io_source::IoSource; +use crate::sys::tcp::{connect, new_for_addr}; +use crate::{event, Interest, Registry, Token}; + +/// A non-blocking TCP stream between a local socket and a remote socket. +/// +/// The socket will be closed when the value is dropped. +/// +/// # Examples +/// +#[cfg_attr(feature = "os-poll", doc = "```")] +#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")] +/// # use std::net::{TcpListener, SocketAddr}; +/// # use std::error::Error; +/// # +/// # fn main() -> Result<(), Box<dyn Error>> { +/// let address: SocketAddr = "127.0.0.1:0".parse()?; +/// let listener = TcpListener::bind(address)?; +/// use mio::{Events, Interest, Poll, Token}; +/// use mio::net::TcpStream; +/// use std::time::Duration; +/// +/// let mut stream = TcpStream::connect(listener.local_addr()?)?; +/// +/// let mut poll = Poll::new()?; +/// let mut events = Events::with_capacity(128); +/// +/// // Register the socket with `Poll` +/// poll.registry().register(&mut stream, Token(0), Interest::WRITABLE)?; +/// +/// poll.poll(&mut events, Some(Duration::from_millis(100)))?; +/// +/// // The socket might be ready at this point +/// # Ok(()) +/// # } +/// ``` +pub struct TcpStream { + inner: IoSource<net::TcpStream>, +} + +impl TcpStream { + /// Create a new TCP stream and issue a non-blocking connect to the + /// specified address. + /// + /// # Notes + /// + /// The returned `TcpStream` may not be connected (and thus usable), unlike + /// the API found in `std::net::TcpStream`. Because Mio issues a + /// *non-blocking* connect it will not block the thread and instead return + /// an unconnected `TcpStream`. + /// + /// Ensuring the returned stream is connected is surprisingly complex when + /// considering cross-platform support. Doing this properly should follow + /// the steps below, an example implementation can be found + /// [here](https://github.com/Thomasdezeeuw/heph/blob/0c4f1ab3eaf08bea1d65776528bfd6114c9f8374/src/net/tcp/stream.rs#L560-L622). + /// + /// 1. Call `TcpStream::connect` + /// 2. Register the returned stream with at least [read interest]. + /// 3. Wait for a (readable) event. + /// 4. Check `TcpStream::peer_addr`. If it returns `libc::EINPROGRESS` or + /// `ErrorKind::NotConnected` it means the stream is not yet connected, + /// go back to step 3. If it returns an address it means the stream is + /// connected, go to step 5. If another error is returned something + /// whent wrong. + /// 5. Now the stream can be used. + /// + /// [read interest]: Interest::READABLE + pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> { + let socket = new_for_addr(addr)?; + #[cfg(unix)] + let stream = unsafe { TcpStream::from_raw_fd(socket) }; + #[cfg(windows)] + let stream = unsafe { TcpStream::from_raw_socket(socket as _) }; + connect(&stream.inner, addr)?; + Ok(stream) + } + + /// Creates a new `TcpStream` from a standard `net::TcpStream`. + /// + /// This function is intended to be used to wrap a TCP stream from the + /// standard library in the Mio equivalent. The conversion assumes nothing + /// about the underlying stream; it is left up to the user to set it in + /// non-blocking mode. + /// + /// # Note + /// + /// The TCP stream here will not have `connect` called on it, so it + /// should already be connected via some other means (be it manually, or + /// the standard library). + pub fn from_std(stream: net::TcpStream) -> TcpStream { + TcpStream { + inner: IoSource::new(stream), + } + } + + /// Returns the socket address of the remote peer of this TCP connection. + pub fn peer_addr(&self) -> io::Result<SocketAddr> { + self.inner.peer_addr() + } + + /// Returns the socket address of the local half of this TCP connection. + pub fn local_addr(&self) -> io::Result<SocketAddr> { + self.inner.local_addr() + } + + /// Shuts down the read, write, or both halves of this connection. + /// + /// This function will cause all pending and future I/O on the specified + /// portions to return immediately with an appropriate value (see the + /// documentation of `Shutdown`). + pub fn shutdown(&self, how: Shutdown) -> io::Result<()> { + self.inner.shutdown(how) + } + + /// Sets the value of the `TCP_NODELAY` option on this socket. + /// + /// If set, this option disables the Nagle algorithm. This means that + /// segments are always sent as soon as possible, even if there is only a + /// small amount of data. When not set, data is buffered until there is a + /// sufficient amount to send out, thereby avoiding the frequent sending of + /// small packets. + /// + /// # Notes + /// + /// On Windows make sure the stream is connected before calling this method, + /// by receiving an (writable) event. Trying to set `nodelay` on an + /// unconnected `TcpStream` is unspecified behavior. + pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> { + self.inner.set_nodelay(nodelay) + } + + /// Gets the value of the `TCP_NODELAY` option on this socket. + /// + /// For more information about this option, see [`set_nodelay`][link]. + /// + /// [link]: #method.set_nodelay + /// + /// # Notes + /// + /// On Windows make sure the stream is connected before calling this method, + /// by receiving an (writable) event. Trying to get `nodelay` on an + /// unconnected `TcpStream` is unspecified behavior. + pub fn nodelay(&self) -> io::Result<bool> { + self.inner.nodelay() + } + + /// Sets the value for the `IP_TTL` option on this socket. + /// + /// This value sets the time-to-live field that is used in every packet sent + /// from this socket. + /// + /// # Notes + /// + /// On Windows make sure the stream is connected before calling this method, + /// by receiving an (writable) event. Trying to set `ttl` on an + /// unconnected `TcpStream` is unspecified behavior. + pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { + self.inner.set_ttl(ttl) + } + + /// Gets the value of the `IP_TTL` option for this socket. + /// + /// For more information about this option, see [`set_ttl`][link]. + /// + /// # Notes + /// + /// On Windows make sure the stream is connected before calling this method, + /// by receiving an (writable) event. Trying to get `ttl` on an + /// unconnected `TcpStream` is unspecified behavior. + /// + /// [link]: #method.set_ttl + pub fn ttl(&self) -> io::Result<u32> { + self.inner.ttl() + } + + /// Get the value of the `SO_ERROR` option on this socket. + /// + /// This will retrieve the stored error in the underlying socket, clearing + /// the field in the process. This can be useful for checking errors between + /// calls. + pub fn take_error(&self) -> io::Result<Option<io::Error>> { + self.inner.take_error() + } + + /// Receives data on the socket from the remote address to which it is + /// connected, without removing that data from the queue. On success, + /// returns the number of bytes peeked. + /// + /// Successive calls return the same data. This is accomplished by passing + /// `MSG_PEEK` as a flag to the underlying recv system call. + pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.peek(buf) + } +} + +impl Read for TcpStream { + fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).read(buf)) + } + + fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).read_vectored(bufs)) + } +} + +impl<'a> Read for &'a TcpStream { + fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).read(buf)) + } + + fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).read_vectored(bufs)) + } +} + +impl Write for TcpStream { + fn write(&mut self, buf: &[u8]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).write(buf)) + } + + fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).write_vectored(bufs)) + } + + fn flush(&mut self) -> io::Result<()> { + self.inner.do_io(|inner| (&*inner).flush()) + } +} + +impl<'a> Write for &'a TcpStream { + fn write(&mut self, buf: &[u8]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).write(buf)) + } + + fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> { + self.inner.do_io(|inner| (&*inner).write_vectored(bufs)) + } + + fn flush(&mut self) -> io::Result<()> { + self.inner.do_io(|inner| (&*inner).flush()) + } +} + +impl event::Source for TcpStream { + fn register( + &mut self, + registry: &Registry, + token: Token, + interests: Interest, + ) -> io::Result<()> { + self.inner.register(registry, token, interests) + } + + fn reregister( + &mut self, + registry: &Registry, + token: Token, + interests: Interest, + ) -> io::Result<()> { + self.inner.reregister(registry, token, interests) + } + + fn deregister(&mut self, registry: &Registry) -> io::Result<()> { + self.inner.deregister(registry) + } +} + +impl fmt::Debug for TcpStream { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + self.inner.fmt(f) + } +} + +#[cfg(unix)] +impl IntoRawFd for TcpStream { + fn into_raw_fd(self) -> RawFd { + self.inner.into_inner().into_raw_fd() + } +} + +#[cfg(unix)] +impl AsRawFd for TcpStream { + fn as_raw_fd(&self) -> RawFd { + self.inner.as_raw_fd() + } +} + +#[cfg(unix)] +impl FromRawFd for TcpStream { + /// Converts a `RawFd` to a `TcpStream`. + /// + /// # Notes + /// + /// The caller is responsible for ensuring that the socket is in + /// non-blocking mode. + unsafe fn from_raw_fd(fd: RawFd) -> TcpStream { + TcpStream::from_std(FromRawFd::from_raw_fd(fd)) + } +} + +#[cfg(windows)] +impl IntoRawSocket for TcpStream { + fn into_raw_socket(self) -> RawSocket { + self.inner.into_inner().into_raw_socket() + } +} + +#[cfg(windows)] +impl AsRawSocket for TcpStream { + fn as_raw_socket(&self) -> RawSocket { + self.inner.as_raw_socket() + } +} + +#[cfg(windows)] +impl FromRawSocket for TcpStream { + /// Converts a `RawSocket` to a `TcpStream`. + /// + /// # Notes + /// + /// The caller is responsible for ensuring that the socket is in + /// non-blocking mode. + unsafe fn from_raw_socket(socket: RawSocket) -> TcpStream { + TcpStream::from_std(FromRawSocket::from_raw_socket(socket)) + } +} |