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use prelude::v1::*;
use ffi::CStr;
use io;
use libc::{self, c_int, size_t, sockaddr, socklen_t};
use net::{SocketAddr, Shutdown};
use str;
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 extern crate libc as netc;
pub type wrlen_t = size_t;
#[cfg(target_os = "linux")]
use libc::SOCK_CLOEXEC;
#[cfg(not(target_os = "linux"))]
const SOCK_CLOEXEC: c_int = 0;
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,
};
Socket::new_raw(fam, ty)
}
pub fn new_raw(fam: c_int, ty: c_int) -> io::Result<Socket> {
unsafe {
if cfg!(linux) {
match cvt(libc::socket(fam, ty | SOCK_CLOEXEC, 0)) {
Ok(fd) => return Ok(Socket(FileDesc::new(fd))),
Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {}
Err(e) => return Err(e),
}
}
let fd = cvt(libc::socket(fam, ty, 0))?;
let fd = FileDesc::new(fd);
fd.set_cloexec()?;
Ok(Socket(fd))
}
}
pub fn new_pair(fam: c_int, ty: c_int) -> io::Result<(Socket, Socket)> {
unsafe {
let mut fds = [0, 0];
if cfg!(linux) {
match cvt(libc::socketpair(fam, ty | SOCK_CLOEXEC, 0, fds.as_mut_ptr())) {
Ok(_) => {
return Ok((Socket(FileDesc::new(fds[0])), Socket(FileDesc::new(fds[1]))));
}
Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {},
Err(e) => return Err(e),
}
}
cvt(libc::socketpair(fam, ty, 0, fds.as_mut_ptr()))?;
let a = FileDesc::new(fds[0]);
let b = FileDesc::new(fds[1]);
a.set_cloexec()?;
b.set_cloexec()?;
Ok((Socket(a), Socket(b)))
}
}
pub fn accept(&self, storage: *mut sockaddr, len: *mut socklen_t)
-> io::Result<Socket> {
if cfg!(target_os = "linux") {
weak! {
fn accept4(c_int, *mut sockaddr, *mut socklen_t, c_int) -> c_int
}
if let Some(accept) = accept4.get() {
let res = cvt_r(|| unsafe {
accept(self.0.raw(), storage, len, SOCK_CLOEXEC)
});
match res {
Ok(fd) => return Ok(Socket(FileDesc::new(fd))),
Err(ref e) if e.raw_os_error() == Some(libc::ENOSYS) => {}
Err(e) => return Err(e),
}
}
}
let fd = 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> {
self.0.duplicate().map(Socket)
}
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
self.0.read(buf)
}
pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
self.0.read_to_end(buf)
}
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
self.0.write(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 = 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,
};
cvt(unsafe { libc::shutdown(self.0.raw(), how) })?;
Ok(())
}
pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
setsockopt(self, libc::IPPROTO_TCP, libc::TCP_NODELAY, nodelay as c_int)
}
pub fn nodelay(&self) -> io::Result<bool> {
let raw: c_int = getsockopt(self, libc::IPPROTO_TCP, libc::TCP_NODELAY)?;
Ok(raw != 0)
}
pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
let mut nonblocking = nonblocking as libc::c_ulong;
cvt(unsafe { libc::ioctl(*self.as_inner(), libc::FIONBIO, &mut nonblocking) }).map(|_| ())
}
pub fn take_error(&self) -> io::Result<Option<io::Error>> {
let raw: c_int = getsockopt(self, libc::SOL_SOCKET, libc::SO_ERROR)?;
if raw == 0 {
Ok(None)
} else {
Ok(Some(io::Error::from_raw_os_error(raw as i32)))
}
}
}
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() }
}