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use std::fmt;
use std::io;
use std::mem;
use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
#[cfg(any(unix, target_os = "redox", target_os = "wasi"))]
use libc::c_int;
#[cfg(windows)]
use winapi::ctypes::c_int;
use sys;
use sys::c;
pub struct Socket {
inner: sys::Socket,
}
impl Socket {
pub fn new(family: c_int, ty: c_int) -> io::Result<Socket> {
Ok(Socket { inner: try!(sys::Socket::new(family, ty)) })
}
pub fn bind(&self, addr: &SocketAddr) -> io::Result<()> {
let (addr, len) = addr2raw(addr);
unsafe {
::cvt(c::bind(self.inner.raw(), addr, len as c::socklen_t)).map(|_| ())
}
}
pub fn listen(&self, backlog: i32) -> io::Result<()> {
unsafe {
::cvt(c::listen(self.inner.raw(), backlog)).map(|_| ())
}
}
pub fn connect(&self, addr: &SocketAddr) -> io::Result<()> {
let (addr, len) = addr2raw(addr);
unsafe {
::cvt(c::connect(self.inner.raw(), addr, len)).map(|_| ())
}
}
pub fn getsockname(&self) -> io::Result<SocketAddr> {
unsafe {
let mut storage: c::sockaddr_storage = mem::zeroed();
let mut len = mem::size_of_val(&storage) as c::socklen_t;
try!(::cvt(c::getsockname(self.inner.raw(),
&mut storage as *mut _ as *mut _,
&mut len)));
raw2addr(&storage, len)
}
}
}
impl fmt::Debug for Socket {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.inner.raw().fmt(f)
}
}
impl ::AsInner for Socket {
type Inner = sys::Socket;
fn as_inner(&self) -> &sys::Socket { &self.inner }
}
impl ::FromInner for Socket {
type Inner = sys::Socket;
fn from_inner(sock: sys::Socket) -> Socket {
Socket { inner: sock }
}
}
impl ::IntoInner for Socket {
type Inner = sys::Socket;
fn into_inner(self) -> sys::Socket { self.inner }
}
fn addr2raw(addr: &SocketAddr) -> (*const c::sockaddr, c::socklen_t) {
match *addr {
SocketAddr::V4(ref a) => {
(a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
}
SocketAddr::V6(ref a) => {
(a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
}
}
}
fn raw2addr(storage: &c::sockaddr_storage, len: c::socklen_t) -> io::Result<SocketAddr> {
match storage.ss_family as c_int {
c::AF_INET => {
unsafe {
assert!(len as usize >= mem::size_of::<c::sockaddr_in>());
let sa = storage as *const _ as *const c::sockaddr_in;
let bits = c::sockaddr_in_u32(&(*sa));
let ip = Ipv4Addr::new((bits >> 24) as u8,
(bits >> 16) as u8,
(bits >> 8) as u8,
bits as u8);
Ok(SocketAddr::V4(SocketAddrV4::new(ip, ::ntoh((*sa).sin_port))))
}
}
c::AF_INET6 => {
unsafe {
assert!(len as usize >= mem::size_of::<c::sockaddr_in6>());
let sa = storage as *const _ as *const c::sockaddr_in6;
#[cfg(windows)] let arr = (*sa).sin6_addr.u.Byte();
#[cfg(not(windows))] let arr = (*sa).sin6_addr.s6_addr;
let ip = Ipv6Addr::new(
(arr[0] as u16) << 8 | (arr[1] as u16),
(arr[2] as u16) << 8 | (arr[3] as u16),
(arr[4] as u16) << 8 | (arr[5] as u16),
(arr[6] as u16) << 8 | (arr[7] as u16),
(arr[8] as u16) << 8 | (arr[9] as u16),
(arr[10] as u16) << 8 | (arr[11] as u16),
(arr[12] as u16) << 8 | (arr[13] as u16),
(arr[14] as u16) << 8 | (arr[15] as u16),
);
#[cfg(windows)] let sin6_scope_id = *(*sa).u.sin6_scope_id();
#[cfg(not(windows))] let sin6_scope_id = (*sa).sin6_scope_id;
Ok(SocketAddr::V6(SocketAddrV6::new(ip,
::ntoh((*sa).sin6_port),
(*sa).sin6_flowinfo,
sin6_scope_id)))
}
}
_ => Err(io::Error::new(io::ErrorKind::InvalidInput, "invalid argument")),
}
}