use std::cell::RefCell;
use std::io;
use std::net::{SocketAddr, ToSocketAddrs, TcpListener, TcpStream};
use std::fmt;
use IntoInner;
use socket::Socket;
use sys::c;
pub struct TcpBuilder {
socket: RefCell<Option<Socket>>,
}
impl TcpBuilder {
pub fn new_v4() -> io::Result<TcpBuilder> {
Socket::new(c::AF_INET, c::SOCK_STREAM).map(::FromInner::from_inner)
}
pub fn new_v6() -> io::Result<TcpBuilder> {
Socket::new(c::AF_INET6, c::SOCK_STREAM).map(::FromInner::from_inner)
}
pub fn bind<T>(&self, addr: T) -> io::Result<&TcpBuilder>
where T: ToSocketAddrs
{
self.with_socket(|sock| {
let addr = try!(::one_addr(addr));
sock.bind(&addr)
}).map(|()| self)
}
pub fn listen(&self, backlog: i32) -> io::Result<TcpListener> {
self.with_socket(|sock| {
sock.listen(backlog)
}).and_then(|()| {
self.to_tcp_listener()
})
}
pub fn connect<T>(&self, addr: T) -> io::Result<TcpStream>
where T: ToSocketAddrs
{
self.with_socket(|sock| {
let err = io::Error::new(io::ErrorKind::Other,
"no socket addresses resolved");
try!(addr.to_socket_addrs()).fold(Err(err), |prev, addr| {
prev.or_else(|_| sock.connect(&addr))
})
}).and_then(|()| {
self.to_tcp_stream()
})
}
pub fn to_tcp_stream(&self) -> io::Result<TcpStream> {
self.socket.borrow_mut().take().map(|s| s.into_inner().into_tcp_stream())
.ok_or(io::Error::new(io::ErrorKind::Other,
"socket has already been consumed"))
}
pub fn to_tcp_listener(&self) -> io::Result<TcpListener> {
self.socket.borrow_mut().take()
.map(|s| s.into_inner().into_tcp_listener())
.ok_or(io::Error::new(io::ErrorKind::Other,
"socket has already been consumed"))
}
pub fn local_addr(&self) -> io::Result<SocketAddr> {
match *self.socket.borrow() {
Some(ref s) => s.getsockname(),
None => Err(io::Error::new(io::ErrorKind::Other,
"builder has already finished its socket")),
}
}
fn with_socket<F>(&self, f: F) -> io::Result<()>
where F: FnOnce(&Socket) -> io::Result<()>
{
match *self.socket.borrow() {
Some(ref s) => f(s),
None => Err(io::Error::new(io::ErrorKind::Other,
"builder has already finished its socket")),
}
}
}
impl fmt::Debug for TcpBuilder {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "TcpBuilder {{ socket: {:?} }}",
self.socket.borrow().as_ref().unwrap())
}
}
impl ::AsInner for TcpBuilder {
type Inner = RefCell<Option<Socket>>;
fn as_inner(&self) -> &RefCell<Option<Socket>> { &self.socket }
}
impl ::FromInner for TcpBuilder {
type Inner = Socket;
fn from_inner(sock: Socket) -> TcpBuilder {
TcpBuilder { socket: RefCell::new(Some(sock)) }
}
}