1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
16 use sync::{Arc, Mutex};
17 use sync::atomic::{AtomicBool, Ordering};
18 use old_io::{self, IoResult, IoError};
20 use sys::{self, timer, retry, c, set_nonblocking, wouldblock};
21 use sys::fs::{fd_t, FileDesc};
22 use sys_common::net::*;
23 use sys_common::net::SocketStatus::*;
24 use sys_common::{eof, mkerr_libc};
26 fn unix_socket(ty: libc::c_int) -> IoResult<fd_t> {
27 match unsafe { libc::socket(libc::AF_UNIX, ty, 0) } {
28 -1 => Err(super::last_error()),
33 fn addr_to_sockaddr_un(addr: &CString,
34 storage: &mut libc::sockaddr_storage)
35 -> IoResult<libc::socklen_t> {
36 // the sun_path length is limited to SUN_LEN (with null)
37 assert!(mem::size_of::<libc::sockaddr_storage>() >=
38 mem::size_of::<libc::sockaddr_un>());
39 let s = unsafe { &mut *(storage as *mut _ as *mut libc::sockaddr_un) };
41 let len = addr.as_bytes().len();
42 if len > s.sun_path.len() - 1 {
44 kind: old_io::InvalidInput,
45 desc: "invalid argument: path must be smaller than SUN_LEN",
49 s.sun_family = libc::AF_UNIX as libc::sa_family_t;
50 for (slot, value) in s.sun_path.iter_mut().zip(addr.as_bytes().iter()) {
51 *slot = *value as libc::c_char;
54 // count the null terminator
55 let len = mem::size_of::<libc::sa_family_t>() + len + 1;
56 return Ok(len as libc::socklen_t);
62 // Unused on Linux, where this lock is not necessary.
68 fn new(fd: fd_t) -> Inner {
69 Inner { fd: fd, lock: Mutex::new(()) }
74 fn drop(&mut self) { unsafe { let _ = libc::close(self.fd); } }
77 fn connect(addr: &CString, ty: libc::c_int,
78 timeout: Option<u64>) -> IoResult<Inner> {
79 let mut storage = unsafe { mem::zeroed() };
80 let len = try!(addr_to_sockaddr_un(addr, &mut storage));
81 let inner = Inner::new(try!(unix_socket(ty)));
82 let addrp = &storage as *const _ as *const libc::sockaddr;
86 match retry(|| unsafe { libc::connect(inner.fd, addrp, len) }) {
87 -1 => Err(super::last_error()),
92 try!(connect_timeout(inner.fd, addrp, len, timeout_ms));
98 fn bind(addr: &CString, ty: libc::c_int) -> IoResult<Inner> {
99 let mut storage = unsafe { mem::zeroed() };
100 let len = try!(addr_to_sockaddr_un(addr, &mut storage));
101 let inner = Inner::new(try!(unix_socket(ty)));
102 let addrp = &storage as *const _ as *const libc::sockaddr;
104 libc::bind(inner.fd, addrp, len)
106 -1 => Err(super::last_error()),
111 ////////////////////////////////////////////////////////////////////////////////
113 ////////////////////////////////////////////////////////////////////////////////
115 pub struct UnixStream {
122 pub fn connect(addr: &CString,
123 timeout: Option<u64>) -> IoResult<UnixStream> {
124 connect(addr, libc::SOCK_STREAM, timeout).map(|inner| {
125 UnixStream::new(Arc::new(inner))
129 fn new(inner: Arc<Inner>) -> UnixStream {
137 pub fn fd(&self) -> fd_t { self.inner.fd }
139 #[cfg(target_os = "linux")]
140 fn lock_nonblocking(&self) {}
142 #[cfg(not(target_os = "linux"))]
143 fn lock_nonblocking<'a>(&'a self) -> Guard<'a> {
146 guard: self.inner.lock.lock().unwrap(),
148 set_nonblocking(self.fd(), true);
152 pub fn read(&mut self, buf: &mut [u8]) -> IoResult<uint> {
154 let dolock = || self.lock_nonblocking();
155 let doread = |nb| unsafe {
156 let flags = if nb {c::MSG_DONTWAIT} else {0};
158 buf.as_mut_ptr() as *mut libc::c_void,
159 buf.len() as libc::size_t,
160 flags) as libc::c_int
162 read(fd, self.read_deadline, dolock, doread)
165 pub fn write(&mut self, buf: &[u8]) -> IoResult<()> {
167 let dolock = || self.lock_nonblocking();
168 let dowrite = |nb: bool, buf: *const u8, len: uint| unsafe {
169 let flags = if nb {c::MSG_DONTWAIT} else {0};
175 match write(fd, self.write_deadline, buf, true, dolock, dowrite) {
181 pub fn close_write(&mut self) -> IoResult<()> {
182 mkerr_libc(unsafe { libc::shutdown(self.fd(), libc::SHUT_WR) })
185 pub fn close_read(&mut self) -> IoResult<()> {
186 mkerr_libc(unsafe { libc::shutdown(self.fd(), libc::SHUT_RD) })
189 pub fn set_timeout(&mut self, timeout: Option<u64>) {
190 let deadline = timeout.map(|a| timer::now() + a).unwrap_or(0);
191 self.read_deadline = deadline;
192 self.write_deadline = deadline;
195 pub fn set_read_timeout(&mut self, timeout: Option<u64>) {
196 self.read_deadline = timeout.map(|a| timer::now() + a).unwrap_or(0);
199 pub fn set_write_timeout(&mut self, timeout: Option<u64>) {
200 self.write_deadline = timeout.map(|a| timer::now() + a).unwrap_or(0);
204 impl Clone for UnixStream {
205 fn clone(&self) -> UnixStream {
206 UnixStream::new(self.inner.clone())
210 ////////////////////////////////////////////////////////////////////////////////
212 ////////////////////////////////////////////////////////////////////////////////
214 pub struct UnixListener {
219 // we currently own the CString, so these impls should be safe
220 unsafe impl Send for UnixListener {}
221 unsafe impl Sync for UnixListener {}
224 pub fn bind(addr: &CString) -> IoResult<UnixListener> {
225 bind(addr, libc::SOCK_STREAM).map(|fd| {
226 UnixListener { inner: fd, path: addr.clone() }
230 pub fn fd(&self) -> fd_t { self.inner.fd }
232 pub fn listen(self) -> IoResult<UnixAcceptor> {
233 match unsafe { libc::listen(self.fd(), 128) } {
234 -1 => Err(super::last_error()),
237 let (reader, writer) = try!(unsafe { sys::os::pipe() });
238 set_nonblocking(reader.fd(), true);
239 set_nonblocking(writer.fd(), true);
240 set_nonblocking(self.fd(), true);
242 inner: Arc::new(AcceptorInner {
246 closed: AtomicBool::new(false),
255 pub struct UnixAcceptor {
256 inner: Arc<AcceptorInner>,
260 struct AcceptorInner {
261 listener: UnixListener,
268 pub fn fd(&self) -> fd_t { self.inner.listener.fd() }
270 pub fn accept(&mut self) -> IoResult<UnixStream> {
271 let deadline = if self.deadline == 0 {None} else {Some(self.deadline)};
273 while !self.inner.closed.load(Ordering::SeqCst) {
275 let mut storage: libc::sockaddr_storage = mem::zeroed();
276 let storagep = &mut storage as *mut libc::sockaddr_storage;
277 let size = mem::size_of::<libc::sockaddr_storage>();
278 let mut size = size as libc::socklen_t;
280 libc::accept(self.fd(),
281 storagep as *mut libc::sockaddr,
282 &mut size as *mut libc::socklen_t) as libc::c_int
284 -1 if wouldblock() => {}
285 -1 => return Err(super::last_error()),
286 fd => return Ok(UnixStream::new(Arc::new(Inner::new(fd)))),
289 try!(await(&[self.fd(), self.inner.reader.fd()],
290 deadline, Readable));
296 pub fn set_timeout(&mut self, timeout: Option<u64>) {
297 self.deadline = timeout.map(|a| timer::now() + a).unwrap_or(0);
300 pub fn close_accept(&mut self) -> IoResult<()> {
301 self.inner.closed.store(true, Ordering::SeqCst);
302 let fd = FileDesc::new(self.inner.writer.fd(), false);
303 match fd.write(&[0]) {
305 Err(..) if wouldblock() => Ok(()),
311 impl Clone for UnixAcceptor {
312 fn clone(&self) -> UnixAcceptor {
313 UnixAcceptor { inner: self.inner.clone(), deadline: 0 }
317 impl Drop for UnixListener {
319 // Unlink the path to the socket to ensure that it doesn't linger. We're
320 // careful to unlink the path before we close the file descriptor to
321 // prevent races where we unlink someone else's path.
323 let _ = libc::unlink(self.path.as_ptr());