mv std libs to library/

1 files changed, 115 insertions, 0 deletions

diff --git a/library/std/src/net/mod.rs b/library/std/src/net/mod.rs
new file mode 100644
index 00000000000..c87e0661dc9
--- /dev/null
+++ b/library/std/src/net/mod.rs
@@ -0,0 +1,115 @@
+//! 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 crate::io::{self, Error, ErrorKind};
+
+#[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::ip::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::parser::AddrParseError;
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::tcp::{Incoming, TcpListener, TcpStream};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::udp::UdpSocket;
+
+mod addr;
+mod ip;
+mod parser;
+mod tcp;
+#[cfg(test)]
+mod test;
+mod udp;
+
+/// 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,
+}
+
+#[inline]
+const fn htons(i: u16) -> u16 {
+    i.to_be()
+}
+#[inline]
+const fn ntohs(i: u16) -> u16 {
+    u16::from_be(i)
+}
+
+fn each_addr<A: ToSocketAddrs, F, T>(addr: A, mut f: F) -> io::Result<T>
+where
+    F: FnMut(io::Result<&SocketAddr>) -> io::Result<T>,
+{
+    let addrs = match addr.to_socket_addrs() {
+        Ok(addrs) => addrs,
+        Err(e) => return f(Err(e)),
+    };
+    let mut last_err = None;
+    for addr in addrs {
+        match f(Ok(&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")
+    }))
+}