Recreate ctr-std from latest nightly

1 files changed, 186 insertions, 0 deletions

diff --git a/ctr-std/src/net/mod.rs b/ctr-std/src/net/mod.rs
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+++ b/ctr-std/src/net/mod.rs
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+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Networking primitives for TCP/UDP communication.
+//!
+//! This module provides networking functionality for the Transmission Control and User
+//! Datagram Protocols, as well as types for IP and socket addresses.
+//!
+//! # Organization
+//!
+//! * [`TcpListener`] and [`TcpStream`] provide functionality for communication over TCP
+//! * [`UdpSocket`] provides functionality for communication over UDP
+//! * [`IpAddr`] represents IP addresses of either IPv4 or IPv6; [`Ipv4Addr`] and
+//!   [`Ipv6Addr`] are respectively IPv4 and IPv6 addresses
+//! * [`SocketAddr`] represents socket addresses of either IPv4 or IPv6; [`SocketAddrV4`]
+//!   and [`SocketAddrV6`] are respectively IPv4 and IPv6 socket addresses
+//! * [`ToSocketAddrs`] is a trait that used for generic address resolution when interacting
+//!   with networking objects like [`TcpListener`], [`TcpStream`] or [`UdpSocket`]
+//! * Other types are return or parameter types for various methods in this module
+//!
+//! [`IpAddr`]: ../../std/net/enum.IpAddr.html
+//! [`Ipv4Addr`]: ../../std/net/struct.Ipv4Addr.html
+//! [`Ipv6Addr`]: ../../std/net/struct.Ipv6Addr.html
+//! [`SocketAddr`]: ../../std/net/enum.SocketAddr.html
+//! [`SocketAddrV4`]: ../../std/net/struct.SocketAddrV4.html
+//! [`SocketAddrV6`]: ../../std/net/struct.SocketAddrV6.html
+//! [`TcpListener`]: ../../std/net/struct.TcpListener.html
+//! [`TcpStream`]: ../../std/net/struct.TcpStream.html
+//! [`ToSocketAddrs`]: ../../std/net/trait.ToSocketAddrs.html
+//! [`UdpSocket`]: ../../std/net/struct.UdpSocket.html
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+use fmt;
+use io::{self, Error, ErrorKind};
+use sys_common::net as net_imp;
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::ip::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::addr::{SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::tcp::{TcpStream, TcpListener, Incoming};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::udp::UdpSocket;
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::parser::AddrParseError;
+
+mod ip;
+mod addr;
+mod tcp;
+mod udp;
+mod parser;
+#[cfg(test)]
+mod test;
+
+/// Possible values which can be passed to the [`shutdown`] method of
+/// [`TcpStream`].
+///
+/// [`shutdown`]: struct.TcpStream.html#method.shutdown
+/// [`TcpStream`]: struct.TcpStream.html
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub enum Shutdown {
+    /// The reading portion of the [`TcpStream`] should be shut down.
+    ///
+    /// All currently blocked and future [reads] will return [`Ok(0)`].
+    ///
+    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
+    /// [reads]: ../../std/io/trait.Read.html
+    /// [`Ok(0)`]: ../../std/result/enum.Result.html#variant.Ok
+    #[stable(feature = "rust1", since = "1.0.0")]
+    Read,
+    /// The writing portion of the [`TcpStream`] should be shut down.
+    ///
+    /// All currently blocked and future [writes] will return an error.
+    ///
+    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
+    /// [writes]: ../../std/io/trait.Write.html
+    #[stable(feature = "rust1", since = "1.0.0")]
+    Write,
+    /// Both the reading and the writing portions of the [`TcpStream`] should be shut down.
+    ///
+    /// See [`Shutdown::Read`] and [`Shutdown::Write`] for more information.
+    ///
+    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
+    /// [`Shutdown::Read`]: #variant.Read
+    /// [`Shutdown::Write`]: #variant.Write
+    #[stable(feature = "rust1", since = "1.0.0")]
+    Both,
+}
+
+#[doc(hidden)]
+trait NetInt {
+    fn from_be(i: Self) -> Self;
+    fn to_be(&self) -> Self;
+}
+macro_rules! doit {
+    ($($t:ident)*) => ($(impl NetInt for $t {
+        fn from_be(i: Self) -> Self { <$t>::from_be(i) }
+        fn to_be(&self) -> Self { <$t>::to_be(*self) }
+    })*)
+}
+doit! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
+
+fn hton<I: NetInt>(i: I) -> I { i.to_be() }
+fn ntoh<I: NetInt>(i: I) -> I { I::from_be(i) }
+
+fn each_addr<A: ToSocketAddrs, F, T>(addr: A, mut f: F) -> io::Result<T>
+    where F: FnMut(&SocketAddr) -> io::Result<T>
+{
+    let mut last_err = None;
+    for addr in addr.to_socket_addrs()? {
+        match f(&addr) {
+            Ok(l) => return Ok(l),
+            Err(e) => last_err = Some(e),
+        }
+    }
+    Err(last_err.unwrap_or_else(|| {
+        Error::new(ErrorKind::InvalidInput,
+                   "could not resolve to any addresses")
+    }))
+}
+
+/// An iterator over `SocketAddr` values returned from a host lookup operation.
+#[unstable(feature = "lookup_host", reason = "unsure about the returned \
+                                              iterator and returning socket \
+                                              addresses",
+           issue = "27705")]
+pub struct LookupHost(net_imp::LookupHost);
+
+#[unstable(feature = "lookup_host", reason = "unsure about the returned \
+                                              iterator and returning socket \
+                                              addresses",
+           issue = "27705")]
+impl Iterator for LookupHost {
+    type Item = SocketAddr;
+    fn next(&mut self) -> Option<SocketAddr> { self.0.next() }
+}
+
+#[unstable(feature = "lookup_host", reason = "unsure about the returned \
+                                              iterator and returning socket \
+                                              addresses",
+           issue = "27705")]
+impl fmt::Debug for LookupHost {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.pad("LookupHost { .. }")
+    }
+}
+
+/// Resolve the host specified by `host` as a number of `SocketAddr` instances.
+///
+/// This method may perform a DNS query to resolve `host` and may also inspect
+/// system configuration to resolve the specified hostname.
+///
+/// The returned iterator will skip over any unknown addresses returned by the
+/// operating system.
+///
+/// # Examples
+///
+/// ```no_run
+/// #![feature(lookup_host)]
+///
+/// use std::net;
+///
+/// # fn foo() -> std::io::Result<()> {
+/// for host in net::lookup_host("rust-lang.org")? {
+///     println!("found address: {}", host);
+/// }
+/// # Ok(())
+/// # }
+/// ```
+#[unstable(feature = "lookup_host", reason = "unsure about the returned \
+                                              iterator and returning socket \
+                                              addresses",
+           issue = "27705")]
+pub fn lookup_host(host: &str) -> io::Result<LookupHost> {
+    net_imp::lookup_host(host).map(LookupHost)
+}