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Move tokio::net module into tokio tcp/udp crates (#224)

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This commit is contained in:
Sam Rijs
2018-03-14 09:38:59 -07:00
committed by Carl Lerche
parent 64435f5b35
commit 923a80e098
29 changed files with 312 additions and 90 deletions
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tokio-udp/src/frame.rs
+156
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use std::io;
use std::net::{SocketAddr, Ipv4Addr, SocketAddrV4};
use futures::{Async, Poll, Stream, Sink, StartSend, AsyncSink};
use super::UdpSocket;
use tokio_io::codec::{Decoder, Encoder};
use bytes::{BytesMut, BufMut};
/// A unified `Stream` and `Sink` interface to an underlying `UdpSocket`, using
/// the `Encoder` and `Decoder` traits to encode and decode frames.
///
/// Raw UDP sockets work with datagrams, but higher-level code usually wants to
/// batch these into meaningful chunks, called "frames". This method layers
/// framing on top of this socket by using the `Encoder` and `Decoder` traits to
/// handle encoding and decoding of messages frames. Note that the incoming and
/// outgoing frame types may be distinct.
///
/// This function returns a *single* object that is both `Stream` and `Sink`;
/// grouping this into a single object is often useful for layering things which
/// require both read and write access to the underlying object.
///
/// If you want to work more directly with the streams and sink, consider
/// calling `split` on the `UdpFramed` returned by this method, which will break
/// them into separate objects, allowing them to interact more easily.
#[must_use = "sinks do nothing unless polled"]
#[derive(Debug)]
pub struct UdpFramed<C> {
socket: UdpSocket,
codec: C,
rd: BytesMut,
wr: BytesMut,
out_addr: SocketAddr,
flushed: bool,
}
impl<C: Decoder> Stream for UdpFramed<C> {
type Item = (C::Item, SocketAddr);
type Error = C::Error;
fn poll(&mut self) -> Poll<Option<(Self::Item)>, Self::Error> {
self.rd.reserve(INITIAL_RD_CAPACITY);
let (n, addr) = unsafe {
// Read into the buffer without having to initialize the memory.
let (n, addr) = try_ready!(self.socket.poll_recv_from(self.rd.bytes_mut()));
self.rd.advance_mut(n);
(n, addr)
};
trace!("received {} bytes, decoding", n);
let frame_res = self.codec.decode(&mut self.rd);
self.rd.clear();
let frame = frame_res?;
let result = frame.map(|frame| (frame, addr)); // frame -> (frame, addr)
trace!("frame decoded from buffer");
Ok(Async::Ready(result))
}
}
impl<C: Encoder> Sink for UdpFramed<C> {
type SinkItem = (C::Item, SocketAddr);
type SinkError = C::Error;
fn start_send(&mut self, item: Self::SinkItem) -> StartSend<Self::SinkItem, Self::SinkError> {
trace!("sending frame");
if !self.flushed {
match try!(self.poll_complete()) {
Async::Ready(()) => {},
Async::NotReady => return Ok(AsyncSink::NotReady(item)),
}
}
let (frame, out_addr) = item;
self.codec.encode(frame, &mut self.wr)?;
self.out_addr = out_addr;
self.flushed = false;
trace!("frame encoded; length={}", self.wr.len());
Ok(AsyncSink::Ready)
}
fn poll_complete(&mut self) -> Poll<(), C::Error> {
if self.flushed {
return Ok(Async::Ready(()))
}
trace!("flushing frame; length={}", self.wr.len());
let n = try_ready!(self.socket.poll_send_to(&self.wr, &self.out_addr));
trace!("written {}", n);
let wrote_all = n == self.wr.len();
self.wr.clear();
self.flushed = true;
if wrote_all {
Ok(Async::Ready(()))
} else {
Err(io::Error::new(io::ErrorKind::Other,
"failed to write entire datagram to socket").into())
}
}
fn close(&mut self) -> Poll<(), C::Error> {
try_ready!(self.poll_complete());
Ok(().into())
}
}
const INITIAL_RD_CAPACITY: usize = 64 * 1024;
const INITIAL_WR_CAPACITY: usize = 8 * 1024;
impl<C> UdpFramed<C> {
/// Create a new `UdpFramed` backed by the given socket and codec.
///
/// See struct level documention for more details.
pub fn new(socket: UdpSocket, codec: C) -> UdpFramed<C> {
UdpFramed {
socket: socket,
codec: codec,
out_addr: SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(0, 0, 0, 0), 0)),
rd: BytesMut::with_capacity(INITIAL_RD_CAPACITY),
wr: BytesMut::with_capacity(INITIAL_WR_CAPACITY),
flushed: true,
}
}
/// Returns a reference to the underlying I/O stream wrapped by `Framed`.
///
/// # Note
///
/// Care should be taken to not tamper with the underlying stream of data
/// coming in as it may corrupt the stream of frames otherwise being worked
/// with.
pub fn get_ref(&self) -> &UdpSocket {
&self.socket
}
/// Returns a mutable reference to the underlying I/O stream wrapped by
/// `Framed`.
///
/// # Note
///
/// Care should be taken to not tamper with the underlying stream of data
/// coming in as it may corrupt the stream of frames otherwise being worked
/// with.
pub fn get_mut(&mut self) -> &mut UdpSocket {
&mut self.socket
}
/// Consumes the `Framed`, returning its underlying I/O stream.
pub fn into_inner(self) -> UdpSocket {
self.socket
}
}
tokio-udp/src/lib.rs
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//! UDP bindings for `tokio`.
//!
//! This module contains the UDP networking types, similar to the standard
//! library, which can be used to implement networking protocols.
//!
//! The main struct for UDP is the [`UdpSocket`], which represents a UDP socket.
//! Reading and writing to it can be done using futures, which return the
//! [`RecvDgram`] and [`SendDgram`] structs respectively.
//!
//! For convience it's also possible to convert raw datagrams into higher-level
//! frames.
//!
//! [`UdpSocket`]: struct.UdpSocket.html
//! [`RecvDgram`]: struct.RecvDgram.html
//! [`SendDgram`]: struct.SendDgram.html
//! [`UdpFramed`]: struct.UdpFramed.html
//! [`framed`]: struct.UdpSocket.html#method.framed
#![doc(html_root_url = "https://docs.rs/tokio-tcp/0.1.0")]
#![deny(missing_docs, warnings, missing_debug_implementations)]
extern crate bytes;
#[macro_use]
extern crate futures;
extern crate mio;
#[macro_use]
extern crate log;
extern crate tokio_io;
extern crate tokio_reactor;
#[cfg(feature = "unstable-futures")]
extern crate futures2;
mod frame;
mod socket;
mod send_dgram;
mod recv_dgram;
pub use self::frame::UdpFramed;
pub use self::socket::UdpSocket;
pub use self::send_dgram::SendDgram;
pub use self::recv_dgram::RecvDgram;
tokio-udp/src/recv_dgram.rs
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use super::socket::UdpSocket;
use std::io;
use std::net::SocketAddr;
use futures::{Async, Future, Poll};
/// A future used to receive a datagram from a UDP socket.
///
/// This is created by the `UdpSocket::recv_dgram` method.
#[must_use = "futures do nothing unless polled"]
#[derive(Debug)]
pub struct RecvDgram<T> {
/// None means future was completed
state: Option<RecvDgramInner<T>>
}
/// A struct is used to represent the full info of RecvDgram.
#[derive(Debug)]
struct RecvDgramInner<T> {
/// Rx socket
socket: UdpSocket,
/// The received data will be put in the buffer
buffer: T
}
impl<T> RecvDgram<T> {
/// Create a new future to receive UDP Datagram
pub(crate) fn new(socket: UdpSocket, buffer: T) -> RecvDgram<T> {
let inner = RecvDgramInner { socket: socket, buffer: buffer };
RecvDgram { state: Some(inner) }
}
}
impl<T> Future for RecvDgram<T>
where T: AsMut<[u8]>,
{
type Item = (UdpSocket, T, usize, SocketAddr);
type Error = io::Error;
fn poll(&mut self) -> Poll<Self::Item, io::Error> {
let (n, addr) = {
let ref mut inner =
self.state.as_mut().expect("RecvDgram polled after completion");
try_ready!(inner.socket.poll_recv_from(inner.buffer.as_mut()))
};
let inner = self.state.take().unwrap();
Ok(Async::Ready((inner.socket, inner.buffer, n, addr)))
}
}
tokio-udp/src/send_dgram.rs
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use super::socket::UdpSocket;
use std::io;
use std::net::SocketAddr;
use futures::{Async, Future, Poll};
/// A future used to write the entire contents of some data to a UDP socket.
///
/// This is created by the `UdpSocket::send_dgram` method.
#[must_use = "futures do nothing unless polled"]
#[derive(Debug)]
pub struct SendDgram<T> {
/// None means future was completed
state: Option<SendDgramInner<T>>
}
/// A struct is used to represent the full info of SendDgram.
#[derive(Debug)]
struct SendDgramInner<T> {
/// Tx socket
socket: UdpSocket,
/// The whole buffer will be sent
buffer: T,
/// Destination addr
addr: SocketAddr,
}
impl<T> SendDgram<T> {
/// Create a new future to send UDP Datagram
pub(crate) fn new(socket: UdpSocket, buffer: T, addr: SocketAddr) -> SendDgram<T> {
let inner = SendDgramInner { socket: socket, buffer: buffer, addr: addr };
SendDgram { state: Some(inner) }
}
}
fn incomplete_write(reason: &str) -> io::Error {
io::Error::new(io::ErrorKind::Other, reason)
}
impl<T> Future for SendDgram<T>
where T: AsRef<[u8]>,
{
type Item = (UdpSocket, T);
type Error = io::Error;
fn poll(&mut self) -> Poll<(UdpSocket, T), io::Error> {
{
let ref mut inner =
self.state.as_mut().expect("SendDgram polled after completion");
let n = try_ready!(inner.socket.poll_send_to(inner.buffer.as_ref(), &inner.addr));
if n != inner.buffer.as_ref().len() {
return Err(incomplete_write("failed to send entire message \
in datagram"))
}
}
let inner = self.state.take().unwrap();
Ok(Async::Ready((inner.socket, inner.buffer)))
}
}
tokio-udp/src/socket.rs
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use super::{SendDgram, RecvDgram};
use std::io;
use std::net::{self, SocketAddr, Ipv4Addr, Ipv6Addr};
use std::fmt;
use futures::{Async, Poll};
use mio;
use tokio_reactor::{Handle, PollEvented};
/// An I/O object representing a UDP socket.
pub struct UdpSocket {
io: PollEvented<mio::net::UdpSocket>,
}
impl UdpSocket {
/// This function will create a new UDP socket and attempt to bind it to
/// the `addr` provided.
pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> {
mio::net::UdpSocket::bind(addr)
.map(UdpSocket::new)
}
fn new(socket: mio::net::UdpSocket) -> UdpSocket {
let io = PollEvented::new(socket);
UdpSocket { io: io }
}
/// Creates a new `UdpSocket` from the previously bound socket provided.
///
/// The socket given will be registered with the event loop that `handle`
/// is associated with. This function requires that `socket` has previously
/// been bound to an address to work correctly.
///
/// This can be used in conjunction with net2's `UdpBuilder` interface to
/// configure a socket before it's handed off, such as setting options like
/// `reuse_address` or binding to multiple addresses.
pub fn from_std(socket: net::UdpSocket,
handle: &Handle) -> io::Result<UdpSocket> {
let io = mio::net::UdpSocket::from_socket(socket)?;
let io = PollEvented::new_with_handle(io, handle)?;
Ok(UdpSocket { io })
}
/// Returns the local address that this socket is bound to.
pub fn local_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().local_addr()
}
/// Connects the UDP socket setting the default destination for send() and
/// limiting packets that are read via recv from the address specified in
/// `addr`.
pub fn connect(&self, addr: &SocketAddr) -> io::Result<()> {
self.io.get_ref().connect(*addr)
}
#[deprecated(since = "0.1.2", note = "use poll_send instead")]
#[doc(hidden)]
pub fn send(&mut self, buf: &[u8]) -> io::Result<usize> {
match self.poll_send(buf)? {
Async::Ready(n) => Ok(n),
Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
}
}
/// Sends data on the socket to the remote address to which it is connected.
///
/// The [`connect`] method will connect this socket to a remote address. This
/// method will fail if the socket is not connected.
///
/// [`connect`]: #method.connect
///
/// # Return
///
/// On success, returns `Ok(Async::Ready(num_bytes_written))`.
///
/// If the socket is not ready for writing, the method returns
/// `Ok(Async::NotReady)` and arranges for the current task to receive a
/// notification when the socket becomes writable.
///
/// # Panics
///
/// This function will panic if called from outside of a task context.
pub fn poll_send(&mut self, buf: &[u8]) -> Poll<usize, io::Error> {
try_ready!(self.io.poll_write_ready());
match self.io.get_ref().send(buf) {
Ok(n) => Ok(n.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_write_ready()?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
#[deprecated(since = "0.1.2", note = "use poll_recv instead")]
#[doc(hidden)]
pub fn recv(&mut self, buf: &mut [u8]) -> io::Result<usize> {
match self.poll_recv(buf)? {
Async::Ready(n) => Ok(n),
Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
}
}
/// Receives a single datagram message on the socket from the remote address to
/// which it is connected. On success, returns the number of bytes read.
///
/// The function must be called with valid byte array `buf` of sufficient size to
/// hold the message bytes. If a message is too long to fit in the supplied buffer,
/// excess bytes may be discarded.
///
/// The [`connect`] method will connect this socket to a remote address. This
/// method will fail if the socket is not connected.
///
/// [`connect`]: #method.connect
///
/// # Return
///
/// On success, returns `Ok(Async::Ready(num_bytes_read))`.
///
/// If no data is available for reading, the method returns
/// `Ok(Async::NotReady)` and arranges for the current task to receive a
/// notification when the socket becomes receivable or is closed.
///
/// # Panics
///
/// This function will panic if called from outside of a task context.
pub fn poll_recv(&mut self, buf: &mut [u8]) -> Poll<usize, io::Error> {
try_ready!(self.io.poll_read_ready(mio::Ready::readable()));
match self.io.get_ref().recv(buf) {
Ok(n) => Ok(n.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_read_ready(mio::Ready::readable())?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
#[deprecated(since = "0.1.2", note = "use poll_send_to instead")]
#[doc(hidden)]
pub fn send_to(&mut self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> {
match self.poll_send_to(buf, target)? {
Async::Ready(n) => Ok(n),
Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
}
}
/// Sends data on the socket to the given address. On success, returns the
/// number of bytes written.
///
/// This will return an error when the IP version of the local socket
/// does not match that of `target`.
///
/// # Return
///
/// On success, returns `Ok(Async::Ready(num_bytes_written))`.
///
/// If the socket is not ready for writing, the method returns
/// `Ok(Async::NotReady)` and arranges for the current task to receive a
/// notification when the socket becomes writable.
///
/// # Panics
///
/// This function will panic if called from outside of a task context.
pub fn poll_send_to(&mut self, buf: &[u8], target: &SocketAddr) -> Poll<usize, io::Error> {
try_ready!(self.io.poll_write_ready());
match self.io.get_ref().send_to(buf, target) {
Ok(n) => Ok(n.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_write_ready()?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// Creates a future that will write the entire contents of the buffer
/// `buf` provided as a datagram to this socket.
///
/// The returned future will return after data has been written to the
/// outbound socket. The future will resolve to the stream as well as the
/// buffer (for reuse if needed).
///
/// Any error which happens during writing will cause both the stream and
/// the buffer to get destroyed. Note that failure to write the entire
/// buffer is considered an error for the purposes of sending a datagram.
///
/// The `buf` parameter here only requires the `AsRef<[u8]>` trait, which
/// should be broadly applicable to accepting data which can be converted
/// to a slice.
pub fn send_dgram<T>(self, buf: T, addr: &SocketAddr) -> SendDgram<T>
where T: AsRef<[u8]>,
{
SendDgram::new(self, buf, *addr)
}
#[deprecated(since = "0.1.2", note = "use poll_recv_from instead")]
#[doc(hidden)]
pub fn recv_from(&mut self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
match self.poll_recv_from(buf)? {
Async::Ready(ret) => Ok(ret),
Async::NotReady => Err(io::ErrorKind::WouldBlock.into()),
}
}
/// Receives data from the socket. On success, returns the number of bytes
/// read and the address from whence the data came.
///
/// # Panics
///
/// This function will panic if called outside the context of a future's
/// task.
pub fn poll_recv_from(&mut self, buf: &mut [u8]) -> Poll<(usize, SocketAddr), io::Error> {
try_ready!(self.io.poll_read_ready(mio::Ready::readable()));
match self.io.get_ref().recv_from(buf) {
Ok(n) => Ok(n.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_read_ready(mio::Ready::readable())?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// Creates a future that receive a datagram to be written to the buffer
/// provided.
///
/// The returned future will return after a datagram has been received on
/// this socket. The future will resolve to the socket, the buffer, the
/// amount of data read, and the address the data was received from.
///
/// An error during reading will cause the socket and buffer to get
/// destroyed.
///
/// The `buf` parameter here only requires the `AsMut<[u8]>` trait, which
/// should be broadly applicable to accepting data which can be converted
/// to a slice.
pub fn recv_dgram<T>(self, buf: T) -> RecvDgram<T>
where T: AsMut<[u8]>,
{
RecvDgram::new(self, buf)
}
/// Gets the value of the `SO_BROADCAST` option for this socket.
///
/// For more information about this option, see [`set_broadcast`].
///
/// [`set_broadcast`]: #method.set_broadcast
pub fn broadcast(&self) -> io::Result<bool> {
self.io.get_ref().broadcast()
}
/// Sets the value of the `SO_BROADCAST` option for this socket.
///
/// When enabled, this socket is allowed to send packets to a broadcast
/// address.
pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
self.io.get_ref().set_broadcast(on)
}
/// Gets the value of the `IP_MULTICAST_LOOP` option for this socket.
///
/// For more information about this option, see [`set_multicast_loop_v4`].
///
/// [`set_multicast_loop_v4`]: #method.set_multicast_loop_v4
pub fn multicast_loop_v4(&self) -> io::Result<bool> {
self.io.get_ref().multicast_loop_v4()
}
/// Sets the value of the `IP_MULTICAST_LOOP` option for this socket.
///
/// If enabled, multicast packets will be looped back to the local socket.
///
/// # Note
///
/// This may not have any affect on IPv6 sockets.
pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
self.io.get_ref().set_multicast_loop_v4(on)
}
/// Gets the value of the `IP_MULTICAST_TTL` option for this socket.
///
/// For more information about this option, see [`set_multicast_ttl_v4`].
///
/// [`set_multicast_ttl_v4`]: #method.set_multicast_ttl_v4
pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
self.io.get_ref().multicast_ttl_v4()
}
/// Sets the value of the `IP_MULTICAST_TTL` option for this socket.
///
/// Indicates the time-to-live value of outgoing multicast packets for
/// this socket. The default value is 1 which means that multicast packets
/// don't leave the local network unless explicitly requested.
///
/// # Note
///
/// This may not have any affect on IPv6 sockets.
pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
self.io.get_ref().set_multicast_ttl_v4(ttl)
}
/// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
///
/// For more information about this option, see [`set_multicast_loop_v6`].
///
/// [`set_multicast_loop_v6`]: #method.set_multicast_loop_v6
pub fn multicast_loop_v6(&self) -> io::Result<bool> {
self.io.get_ref().multicast_loop_v6()
}
/// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
///
/// Controls whether this socket sees the multicast packets it sends itself.
///
/// # Note
///
/// This may not have any affect on IPv4 sockets.
pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
self.io.get_ref().set_multicast_loop_v6(on)
}
/// Gets the value of the `IP_TTL` option for this socket.
///
/// For more information about this option, see [`set_ttl`].
///
/// [`set_ttl`]: #method.set_ttl
pub fn ttl(&self) -> io::Result<u32> {
self.io.get_ref().ttl()
}
/// 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.io.get_ref().set_ttl(ttl)
}
/// Executes an operation of the `IP_ADD_MEMBERSHIP` type.
///
/// This function specifies a new multicast group for this socket to join.
/// The address must be a valid multicast address, and `interface` is the
/// address of the local interface with which the system should join the
/// multicast group. If it's equal to `INADDR_ANY` then an appropriate
/// interface is chosen by the system.
pub fn join_multicast_v4(&self,
multiaddr: &Ipv4Addr,
interface: &Ipv4Addr) -> io::Result<()> {
self.io.get_ref().join_multicast_v4(multiaddr, interface)
}
/// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type.
///
/// This function specifies a new multicast group for this socket to join.
/// The address must be a valid multicast address, and `interface` is the
/// index of the interface to join/leave (or 0 to indicate any interface).
pub fn join_multicast_v6(&self,
multiaddr: &Ipv6Addr,
interface: u32) -> io::Result<()> {
self.io.get_ref().join_multicast_v6(multiaddr, interface)
}
/// Executes an operation of the `IP_DROP_MEMBERSHIP` type.
///
/// For more information about this option, see [`join_multicast_v4`].
///
/// [`join_multicast_v4`]: #method.join_multicast_v4
pub fn leave_multicast_v4(&self,
multiaddr: &Ipv4Addr,
interface: &Ipv4Addr) -> io::Result<()> {
self.io.get_ref().leave_multicast_v4(multiaddr, interface)
}
/// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.
///
/// For more information about this option, see [`join_multicast_v6`].
///
/// [`join_multicast_v6`]: #method.join_multicast_v6
pub fn leave_multicast_v6(&self,
multiaddr: &Ipv6Addr,
interface: u32) -> io::Result<()> {
self.io.get_ref().leave_multicast_v6(multiaddr, interface)
}
}
impl fmt::Debug for UdpSocket {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.io.get_ref().fmt(f)
}
}
#[cfg(all(unix, not(target_os = "fuchsia")))]
mod sys {
use std::os::unix::prelude::*;
use super::UdpSocket;
impl AsRawFd for UdpSocket {
fn as_raw_fd(&self) -> RawFd {
self.io.get_ref().as_raw_fd()
}
}
}
#[cfg(windows)]
mod sys {
// TODO: let's land these upstream with mio and then we can add them here.
//
// use std::os::windows::prelude::*;
// use super::UdpSocket;
//
// impl AsRawHandle for UdpSocket {
// fn as_raw_handle(&self) -> RawHandle {
// self.io.get_ref().as_raw_handle()
// }
// }
}