1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
use {Incoming, UnixStream};
use tokio_reactor::{Handle, PollEvented};
use futures::{Async, Poll};
use mio::Ready;
use mio_uds;
use std::fmt;
use std::io;
use std::os::unix::io::{AsRawFd, RawFd};
use std::os::unix::net::{self, SocketAddr};
use std::path::Path;
/// A Unix socket which can accept connections from other Unix sockets.
pub struct UnixListener {
io: PollEvented<mio_uds::UnixListener>,
}
impl UnixListener {
/// Creates a new `UnixListener` bound to the specified path.
pub fn bind<P>(path: P) -> io::Result<UnixListener>
where
P: AsRef<Path>,
{
let listener = mio_uds::UnixListener::bind(path)?;
let io = PollEvented::new(listener);
Ok(UnixListener { io })
}
/// Consumes a `UnixListener` in the standard library and returns a
/// nonblocking `UnixListener` from this crate.
///
/// The returned listener will be associated with the given event loop
/// specified by `handle` and is ready to perform I/O.
pub fn from_std(listener: net::UnixListener, handle: &Handle) -> io::Result<UnixListener> {
let listener = mio_uds::UnixListener::from_listener(listener)?;
let io = PollEvented::new_with_handle(listener, handle)?;
Ok(UnixListener { io })
}
/// Returns the local socket address of this listener.
pub fn local_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().local_addr()
}
/// Test whether this socket is ready to be read or not.
pub fn poll_read_ready(&self, ready: Ready) -> Poll<Ready, io::Error> {
self.io.poll_read_ready(ready)
}
/// Returns the value of the `SO_ERROR` option.
pub fn take_error(&self) -> io::Result<Option<io::Error>> {
self.io.get_ref().take_error()
}
/// Attempt to accept a connection and create a new connected `UnixStream`
/// if successful.
///
/// This function will attempt an accept operation, but will not block
/// waiting for it to complete. If the operation would block then a "would
/// block" error is returned. Additionally, if this method would block, it
/// registers the current task to receive a notification when it would
/// otherwise not block.
///
/// Note that typically for simple usage it's easier to treat incoming
/// connections as a `Stream` of `UnixStream`s with the `incoming` method
/// below.
///
/// # Panics
///
/// This function will panic if it is called outside the context of a
/// future's task. It's recommended to only call this from the
/// implementation of a `Future::poll`, if necessary.
pub fn poll_accept(&self) -> Poll<(UnixStream, SocketAddr), io::Error> {
let (io, addr) = try_ready!(self.poll_accept_std());
let io = mio_uds::UnixStream::from_stream(io)?;
Ok((UnixStream::new(io), addr).into())
}
/// Attempt to accept a connection and create a new connected `UnixStream`
/// if successful.
///
/// This function is the same as `poll_accept` above except that it returns a
/// `mio_uds::UnixStream` instead of a `tokio_udp::UnixStream`. This in turn
/// can then allow for the stream to be associated with a different reactor
/// than the one this `UnixListener` is associated with.
///
/// This function will attempt an accept operation, but will not block
/// waiting for it to complete. If the operation would block then a "would
/// block" error is returned. Additionally, if this method would block, it
/// registers the current task to receive a notification when it would
/// otherwise not block.
///
/// Note that typically for simple usage it's easier to treat incoming
/// connections as a `Stream` of `UnixStream`s with the `incoming` method
/// below.
///
/// # Panics
///
/// This function will panic if it is called outside the context of a
/// future's task. It's recommended to only call this from the
/// implementation of a `Future::poll`, if necessary.
pub fn poll_accept_std(&self) -> Poll<(net::UnixStream, SocketAddr), io::Error> {
loop {
try_ready!(self.io.poll_read_ready(Ready::readable()));
match self.io.get_ref().accept_std() {
Ok(None) => {
self.io.clear_read_ready(Ready::readable())?;
return Ok(Async::NotReady);
}
Ok(Some((sock, addr))) => {
return Ok(Async::Ready((sock, addr)));
}
Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_read_ready(Ready::readable())?;
return Ok(Async::NotReady);
}
Err(err) => return Err(err),
}
}
}
/// Consumes this listener, returning a stream of the sockets this listener
/// accepts.
///
/// This method returns an implementation of the `Stream` trait which
/// resolves to the sockets the are accepted on this listener.
pub fn incoming(self) -> Incoming {
Incoming::new(self)
}
}
impl fmt::Debug for UnixListener {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.io.get_ref().fmt(f)
}
}
impl AsRawFd for UnixListener {
fn as_raw_fd(&self) -> RawFd {
self.io.get_ref().as_raw_fd()
}
}