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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Extensions to `std::net` networking types.
//!
//! This crate implements a number of extensions to the standard `std::net`
//! networking types, hopefully being slated for inclusion into the standard
//! library in the future. The goal of this crate is to expose all sorts of
//! cross-platform and platform-specific configuration options of UDP/TCP
//! sockets. System APIs are wrapped with as thin a layer as possible instead of
//! bundling multiple actions into one API call.
//!
//! More information about the design of this crate can be found in the
//! [associated rfc][rfc]
//!
//!
//! # Examples
//!
//! ```no_run
//! use net2::TcpBuilder;
//!
//! let tcp = TcpBuilder::new_v4().unwrap();
//! tcp.reuse_address(true).unwrap()
//! .only_v6(false).unwrap();
//!
//! let mut stream = tcp.connect("127.0.0.1:80").unwrap();
//!
//! // use `stream` as a TcpStream
//! ```
#![deny(missing_docs, warnings)]
// Silence warnings about deprecated try!() usage
#![allow(deprecated)]
#![cfg_attr(target_os = "wasi", feature(wasi_ext))]
#[cfg(any(target_os = "wasi", unix))] extern crate libc;
#[cfg(windows)] extern crate winapi;
#[macro_use] extern crate cfg_if;
use std::io;
use std::ops::Neg;
use std::net::{ToSocketAddrs, SocketAddr};
use utils::{One, NetInt};
mod tcp;
mod udp;
mod socket;
mod ext;
mod utils;
#[cfg(unix)] #[path = "sys/unix/mod.rs"] mod sys;
#[cfg(windows)] #[path = "sys/windows/mod.rs"] mod sys;
#[cfg(target_os = "wasi")] #[path = "sys/wasi/mod.rs"] mod sys;
#[cfg(all(unix, not(any(target_os = "solaris", target_os = "illumos"))))] pub mod unix;
pub use tcp::TcpBuilder;
pub use udp::UdpBuilder;
pub use ext::{TcpStreamExt, TcpListenerExt, UdpSocketExt};
fn one_addr<T: ToSocketAddrs>(tsa: T) -> io::Result<SocketAddr> {
let mut addrs = try!(tsa.to_socket_addrs());
let addr = match addrs.next() {
Some(addr) => addr,
None => return Err(io::Error::new(io::ErrorKind::Other,
"no socket addresses could be resolved"))
};
if addrs.next().is_none() {
Ok(addr)
} else {
Err(io::Error::new(io::ErrorKind::Other,
"more than one address resolved"))
}
}
fn cvt<T: One + PartialEq + Neg<Output=T>>(t: T) -> io::Result<T> {
let one: T = T::one();
if t == -one {
Err(io::Error::last_os_error())
} else {
Ok(t)
}
}
#[cfg(windows)]
fn cvt_win<T: PartialEq + utils::Zero>(t: T) -> io::Result<T> {
if t == T::zero() {
Err(io::Error::last_os_error())
} else {
Ok(t)
}
}
fn hton<I: NetInt>(i: I) -> I { i.to_be() }
fn ntoh<I: NetInt>(i: I) -> I { I::from_be(i) }
trait AsInner {
type Inner;
fn as_inner(&self) -> &Self::Inner;
}
trait FromInner {
type Inner;
fn from_inner(inner: Self::Inner) -> Self;
}
trait IntoInner {
type Inner;
fn into_inner(self) -> Self::Inner;
}