src/libstd/sys/unix/net.rs

   1 // Copyright 2015 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.
   4 //
   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.
  10
  11 use prelude::v1::*;
  12
  13 use ffi::CStr;
  14 use io;
  15 use libc::{self, c_int, size_t};
  16 use str;
  17 use sys::c;
  18 use net::{SocketAddr, IpAddr};
  19 use sys::fd::FileDesc;
  20 use sys_common::AsInner;
  21
  22 pub use sys::{cvt, cvt_r};
  23
  24 pub type wrlen_t = size_t;
  25
  26 pub struct Socket(FileDesc);
  27
  28 pub fn init() {}
  29
  30 pub fn cvt_gai(err: c_int) -> io::Result<()> {
  31     if err == 0 { return Ok(()) }
  32
  33     let detail = unsafe {
  34         str::from_utf8(CStr::from_ptr(c::gai_strerror(err)).to_bytes()).unwrap()
  35             .to_string()
  36     };
  37     Err(io::Error::new(io::ErrorKind::Other,
  38                        "failed to lookup address information", Some(detail)))
  39 }
  40
  41 impl Socket {
  42     pub fn new(addr: &SocketAddr, ty: c_int) -> io::Result<Socket> {
  43         let fam = match addr.ip() {
  44             IpAddr::V4(..) => libc::AF_INET,
  45             IpAddr::V6(..) => libc::AF_INET6,
  46         };
  47         unsafe {
  48             let fd = try!(cvt(libc::socket(fam, ty, 0)));
  49             Ok(Socket(FileDesc::new(fd)))
  50         }
  51     }
  52
  53     pub fn accept(&self, storage: *mut libc::sockaddr,
  54                   len: *mut libc::socklen_t) -> io::Result<Socket> {
  55         let fd = try!(cvt_r(|| unsafe {
  56             libc::accept(self.0.raw(), storage, len)
  57         }));
  58         Ok(Socket(FileDesc::new(fd)))
  59     }
  60
  61     pub fn duplicate(&self) -> io::Result<Socket> {
  62         cvt(unsafe { libc::dup(self.0.raw()) }).map(|fd| {
  63             Socket(FileDesc::new(fd))
  64         })
  65     }
  66
  67     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
  68         self.0.read(buf)
  69     }
  70 }
  71
  72 impl AsInner<c_int> for Socket {
  73     fn as_inner(&self) -> &c_int { self.0.as_inner() }
  74 }