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use amplify::Bipolar;
use core::convert::TryFrom;
use core::time::Duration;
use inet2_addr::InetSocketAddr;
use std::io::{Read, Write};
use std::net::SocketAddr;
use super::{Duplex, Error, RecvFrame, SendFrame};
#[derive(Debug)]
pub struct Connection {
pub(self) stream: std::net::TcpStream,
pub(self) remote_addr: InetSocketAddr,
}
impl Connection {
pub fn with(
stream: std::net::TcpStream,
remote_addr: InetSocketAddr,
) -> Self {
Self {
stream,
remote_addr,
}
}
pub fn connect(inet_addr: InetSocketAddr) -> Result<Self, Error> {
if let Ok(socket_addr) = SocketAddr::try_from(inet_addr) {
let stream = std::net::TcpStream::connect(socket_addr)?;
stream.set_read_timeout(Some(Duration::from_secs(30)))?;
Ok(Self::with(stream, inet_addr))
} else {
Err(Error::TorNotSupportedYet)
}
}
pub fn accept(inet_addr: InetSocketAddr) -> Result<Self, Error> {
if let Ok(socket_addr) = SocketAddr::try_from(inet_addr) {
let listener = std::net::TcpListener::bind(socket_addr)?;
let (stream, remote_addr) = listener.accept()?;
stream.set_read_timeout(Some(Duration::from_secs(30)))?;
Ok(Self::with(stream, remote_addr.into()))
} else {
Err(Error::TorNotSupportedYet)
}
}
}
impl Duplex for Connection {
#[inline]
fn as_receiver(&mut self) -> &mut dyn RecvFrame {
&mut self.stream
}
#[inline]
fn as_sender(&mut self) -> &mut dyn SendFrame {
&mut self.stream
}
#[inline]
fn split(self) -> (Box<dyn RecvFrame + Send>, Box<dyn SendFrame + Send>) {
(
Box::new(
self.stream.try_clone().expect("Error cloning TCP socket"),
),
Box::new(self.stream),
)
}
}
impl Bipolar for Connection {
type Left = std::net::TcpStream;
type Right = std::net::TcpStream;
fn join(left: Self::Left, right: Self::Right) -> Self {
#[cfg(not(target_os = "windows"))]
use std::os::unix::io::AsRawFd;
#[cfg(target_os = "windows")]
use std::os::windows::io::AsRawSocket;
#[cfg(not(target_os = "windows"))]
assert_eq!(
left.as_raw_fd(),
right.as_raw_fd(),
"Two independent TCP sockets can't be joined"
);
#[cfg(target_os = "windows")]
assert_eq!(
left.as_raw_socket(),
right.as_raw_socket(),
"Two independent TCP sockets can't be joined"
);
Self {
stream: left,
remote_addr: Default::default(),
}
}
fn split(self) -> (Self::Left, Self::Right) {
(
self.stream.try_clone().expect("TcpStream cloning failed"),
self.stream,
)
}
}
impl RecvFrame for std::net::TcpStream {
fn recv_frame(&mut self) -> Result<Vec<u8>, Error> {
let mut len_buf = [0u8; 2];
self.read_exact(&mut len_buf)?;
let len = u16::from_be_bytes(len_buf) as usize;
let mut buf: Vec<u8> = vec![
0u8;
len + super::FRAME_PREFIX_SIZE
+ super::FRAME_SUFFIX_SIZE
];
buf[0..2].copy_from_slice(&len_buf);
self.read_exact(&mut buf[2..])?;
Ok(buf)
}
fn recv_raw(&mut self, len: usize) -> Result<Vec<u8>, Error> {
let mut buf: Vec<u8> = vec![0u8; len];
self.read_exact(&mut buf)?;
Ok(buf)
}
}
impl SendFrame for std::net::TcpStream {
fn send_frame(&mut self, data: &[u8]) -> Result<usize, Error> {
let len = data.len();
if len > super::MAX_FRAME_SIZE {
return Err(Error::OversizedFrame(len));
}
self.write_all(data)?;
Ok(len)
}
fn send_raw(&mut self, data: &[u8]) -> Result<usize, Error> {
self.write_all(data)?;
Ok(data.len())
}
}