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use prelude::v1::*;
use ffi::CStr;
use io;
use libc::{self, c_int, size_t};
use net::{SocketAddr, Shutdown};
use str;
use sync::atomic::{AtomicBool, Ordering};
use sys::fd::FileDesc;
use sys_common::{AsInner, FromInner, IntoInner};
use sys_common::net::{getsockopt, setsockopt};
use time::Duration;
pub use sys::{cvt, cvt_r};
pub use libc as netc;
pub type wrlen_t = size_t;
pub struct Socket(FileDesc);
pub fn init() {}
pub fn cvt_gai(err: c_int) -> io::Result<()> {
if err == 0 { return Ok(()) }
let detail = unsafe {
str::from_utf8(CStr::from_ptr(libc::gai_strerror(err)).to_bytes()).unwrap()
.to_owned()
};
Err(io::Error::new(io::ErrorKind::Other,
&format!("failed to lookup address information: {}",
detail)[..]))
}
impl Socket {
pub fn new(addr: &SocketAddr, ty: c_int) -> io::Result<Socket> {
let fam = match *addr {
SocketAddr::V4(..) => libc::AF_INET,
SocketAddr::V6(..) => libc::AF_INET6,
};
unsafe {
let fd = try!(cvt(libc::socket(fam, ty, 0)));
let fd = FileDesc::new(fd);
fd.set_cloexec();
Ok(Socket(fd))
}
}
pub fn accept(&self, storage: *mut libc::sockaddr,
len: *mut libc::socklen_t) -> io::Result<Socket> {
let fd = try!(cvt_r(|| unsafe {
libc::accept(self.0.raw(), storage, len)
}));
let fd = FileDesc::new(fd);
fd.set_cloexec();
Ok(Socket(fd))
}
pub fn duplicate(&self) -> io::Result<Socket> {
#[cfg(target_os = "android")]
use libc::F_DUPFD as F_DUPFD_CLOEXEC;
#[cfg(not(target_os = "android"))]
use libc::F_DUPFD_CLOEXEC;
let make_socket = |fd| {
let fd = FileDesc::new(fd);
fd.set_cloexec();
Socket(fd)
};
static TRY_CLOEXEC: AtomicBool = AtomicBool::new(true);
let fd = self.0.raw();
if !cfg!(target_os = "android") && TRY_CLOEXEC.load(Ordering::Relaxed) {
match cvt(unsafe { libc::fcntl(fd, F_DUPFD_CLOEXEC, 0) }) {
Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {
TRY_CLOEXEC.store(false, Ordering::Relaxed);
}
res => return res.map(make_socket),
}
}
cvt(unsafe { libc::fcntl(fd, libc::F_DUPFD, 0) }).map(make_socket)
}
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
self.0.read(buf)
}
pub fn set_timeout(&self, dur: Option<Duration>, kind: libc::c_int) -> io::Result<()> {
let timeout = match dur {
Some(dur) => {
if dur.as_secs() == 0 && dur.subsec_nanos() == 0 {
return Err(io::Error::new(io::ErrorKind::InvalidInput,
"cannot set a 0 duration timeout"));
}
let secs = if dur.as_secs() > libc::time_t::max_value() as u64 {
libc::time_t::max_value()
} else {
dur.as_secs() as libc::time_t
};
let mut timeout = libc::timeval {
tv_sec: secs,
tv_usec: (dur.subsec_nanos() / 1000) as libc::suseconds_t,
};
if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
timeout.tv_usec = 1;
}
timeout
}
None => {
libc::timeval {
tv_sec: 0,
tv_usec: 0,
}
}
};
setsockopt(self, libc::SOL_SOCKET, kind, timeout)
}
pub fn timeout(&self, kind: libc::c_int) -> io::Result<Option<Duration>> {
let raw: libc::timeval = try!(getsockopt(self, libc::SOL_SOCKET, kind));
if raw.tv_sec == 0 && raw.tv_usec == 0 {
Ok(None)
} else {
let sec = raw.tv_sec as u64;
let nsec = (raw.tv_usec as u32) * 1000;
Ok(Some(Duration::new(sec, nsec)))
}
}
pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
let how = match how {
Shutdown::Write => libc::SHUT_WR,
Shutdown::Read => libc::SHUT_RD,
Shutdown::Both => libc::SHUT_RDWR,
};
try!(cvt(unsafe { libc::shutdown(self.0.raw(), how) }));
Ok(())
}
}
impl AsInner<c_int> for Socket {
fn as_inner(&self) -> &c_int { self.0.as_inner() }
}
impl FromInner<c_int> for Socket {
fn from_inner(fd: c_int) -> Socket { Socket(FileDesc::new(fd)) }
}
impl IntoInner<c_int> for Socket {
fn into_inner(self) -> c_int { self.0.into_raw() }
}