| 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::net::TcpSocket; |
| 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. |
| pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> { |
| let socket = TcpSocket::new_for_addr(addr)?; |
| socket.connect(addr) |
| } |
| |
| /// 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)) |
| } |
| } |