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//! Server and client side connections.
//!
//! This is the border point between physical tcp network and abstraction of actor's. Connections
//! works with a binary data from tcp streams. They parse packets from the network and sends new
//! binary packets to her.
use super::packet::Packet;
use super::packet::PREAMBLE;
use crate::common::tsafe::TSafe;
use arraydeque::{ArrayDeque, Array};
use bytes::{BytesMut, Bytes, Buf, BufMut, BigEndian};
use std::thread;
use std::sync::{Arc, Mutex};
use std::sync::mpsc;
use std::sync::mpsc::{Sender, Receiver};
use std::net::TcpStream;
use std::net::SocketAddr;
use std::io::prelude::*;
use std::time::Duration;
use std::io::{Cursor, SeekFrom, ErrorKind};
enum ParseMode {
Preamble,
Header,
Body
}
pub enum ConnectionData {
ReceivedPacket(Packet),
Closed
}
pub struct ClientConnection {
stream: TSafe<Option<TcpStream>>,
stop_stream: TSafe<bool>,
stop_conn: TSafe<bool>
}
impl ClientConnection {
pub fn new(addr: SocketAddr, sender: Sender<ConnectionData>) -> ClientConnection {
let stream = tsafe!(None);
let stop_stream = tsafe!(false);
let stop_conn = tsafe!(false);
Self::serve(addr, stream.clone(), stop_stream.clone(), stop_conn.clone(), sender);
ClientConnection {
stream,
stop_stream,
stop_conn
}
}
pub fn serve(addr: SocketAddr, own_stream: TSafe<Option<TcpStream>>, stop_stream: TSafe<bool>, stop_conn: TSafe<bool>, sender: Sender<ConnectionData>) {
thread::spawn(move || {
while !*stop_conn.lock().unwrap() {
let mut buffer = [0; 1];
// Утановкить соединение
let stream = TcpStream::connect(addr.clone());
if stream.is_ok() {
trace!("Connection was success established [ addr={} ]", addr);
*stop_stream.lock().unwrap() = false;
let mut stream = stream.ok().unwrap();
stream.set_read_timeout(Some(Duration::from_secs(1)));
{
let mut own_stream = own_stream.lock().unwrap();
*own_stream = Some(stream.try_clone().unwrap());
}
let mut in_buf: ArrayDeque<[u8; 32768]> = ArrayDeque::new();
let mut mode = ParseMode::Preamble;
let mut id = 0;
let mut opm = 0;
let mut length = 0;
while !*stop_stream.lock().unwrap() {
let ch = stream.read_exact(&mut buffer[..]);
if ch.is_ok() {
let ch = buffer[0];
//println!("{:?}", ch);
in_buf.push_back(ch);
let dlen = in_buf.len();
match mode {
ParseMode::Preamble => {
if dlen >= 8 {
let mut buf = Cursor::new(vec![0; 8]);
for i in 0..8 {
buf.put_u8(*in_buf.get(i).unwrap());
}
buf.seek(SeekFrom::Start(0));
if buf.get_u64_be() == PREAMBLE {
in_buf.clear();
mode = ParseMode::Header;
}
}
},
ParseMode::Header => {
if dlen >= 7 {
let mut buf = Cursor::new(vec![0; 7]);
for i in 0..7 {
buf.put_u8(*in_buf.get(i).unwrap());
}
buf.seek(SeekFrom::Start(0));
id = buf.get_u32_be();
buf.seek(SeekFrom::Start(4));
opm = buf.get_u8();
buf.seek(SeekFrom::Start(5));
length = buf.get_u16_be();
in_buf.clear();
mode = ParseMode::Body;
}
},
ParseMode::Body => {
if dlen >= length as usize {
let mut buf = vec![];
for i in 0..length {
buf.put_u8(*in_buf.get(i as usize).unwrap());
}
let packet = Packet::new(id, opm, length, buf);
sender.send(ConnectionData::ReceivedPacket(packet));
in_buf.clear();
mode = ParseMode::Preamble;
}
}
}
} else {
let err = ch.err().unwrap().kind();
match err {
ErrorKind::WouldBlock => continue,
_ => {
error!("IO error while reading stream [ addr={}, err={:?} ]", addr, err);
break;
}
}
}
}
trace!("Stream was break [ addr={} ]", addr)
} else {
let mut own_stream = own_stream.lock().unwrap();
*own_stream = None;
error!("Unable to establish remote connection [ addr={} ]", addr)
}
thread::sleep(Duration::from_secs(3))
}
sender.send(ConnectionData::Closed);
trace!("Connection was closed")
});
}
pub fn send(&mut self, packet: Packet) -> bool {
let stream = self.stream.lock().unwrap();
if stream.is_some() {
let result = stream.as_ref().unwrap().write(&packet.to_binary()[..]);
if result.is_err() {
*self.stop_stream.lock().unwrap() = true;
error!("Unable write data to the stream. Stream is broken");
return false
}
} else {
error!("Unable write data to the stream. Stream in inconsistent state");
return false
}
true
}
pub fn close(&mut self) {
let mut stop_stream = self.stop_stream.lock().unwrap();
*stop_stream = true;
let mut stop_conn = self.stop_conn.lock().unwrap();
*stop_conn = true;
//*self.stream.lock().unwrap() = None;
//println!("XXX");
}
}
impl Drop for ClientConnection {
fn drop(&mut self) {
println!("ClientConnection dropped")
}
}
//=================================================================================================
pub struct ServerConnection {
stream: TcpStream,
stop_stream: TSafe<bool>
}
impl ServerConnection {
pub fn new(stream: TcpStream, sender: Sender<ConnectionData>) -> ServerConnection {
let stop_stream = tsafe!(false);
Self::serve(stream.try_clone().unwrap(), stop_stream.clone(), sender);
ServerConnection {
stream,
stop_stream
}
}
pub fn serve(stream: TcpStream, stop_stream: TSafe<bool>, sender: Sender<ConnectionData>) {
thread::spawn(move || {
let mut buffer = [0; 1];
let mut stream = stream;
stream.set_read_timeout(Some(Duration::from_secs(1)));
let mut in_buf: ArrayDeque<[u8; 32768]> = ArrayDeque::new();
let mut mode = ParseMode::Preamble;
let mut id = 0;
let mut opm = 0;
let mut length = 0;
while !*stop_stream.lock().unwrap() {
let ch = stream.read_exact(&mut buffer[..]);
if ch.is_ok() {
let ch = buffer[0];
//println!("{:?}", ch);
in_buf.push_back(ch);
let dlen = in_buf.len();
match mode {
ParseMode::Preamble => {
if dlen >= 8 {
let mut buf = Cursor::new(vec![0; 8]);
for i in 0..8 {
buf.put_u8(*in_buf.get(i).unwrap());
}
buf.seek(SeekFrom::Start(0));
if buf.get_u64_be() == PREAMBLE {
in_buf.clear();
mode = ParseMode::Header;
}
}
},
ParseMode::Header => {
if dlen >= 7 {
let mut buf = Cursor::new(vec![0; 7]);
for i in 0..7 {
buf.put_u8(*in_buf.get(i).unwrap());
}
buf.seek(SeekFrom::Start(0));
id = buf.get_u32_be();
buf.seek(SeekFrom::Start(4));
opm = buf.get_u8();
buf.seek(SeekFrom::Start(5));
length = buf.get_u16_be();
in_buf.clear();
mode = ParseMode::Body;
}
},
ParseMode::Body => {
if dlen >= length as usize {
let mut buf = vec![];
for i in 0..length {
buf.put_u8(*in_buf.get(i as usize).unwrap());
}
let packet = Packet::new(id, opm, length, buf);
sender.send(ConnectionData::ReceivedPacket(packet));
in_buf.clear();
mode = ParseMode::Preamble;
}
}
}
} else {
let err = ch.err().unwrap().kind();
match err {
ErrorKind::WouldBlock => continue,
_ => {
error!("IO error while reading stream [ err={:?} ]", err);
break;
}
}
}
}
sender.send(ConnectionData::Closed);
trace!("Stream was break. Connection closed")
});
}
pub fn receive(&mut self) -> Packet {
unimplemented!()
}
pub fn send(&mut self, packet: Packet) -> bool {
let result = self.stream.write(&packet.to_binary()[..]);
if result.is_err() {
*self.stop_stream.lock().unwrap() = true;
error!("Unable write data to the stream. Stream is broken");
return false;
}
true
}
pub fn close(&mut self) {
let mut stop_stream = self.stop_stream.lock().unwrap();
*stop_stream = true;
}
}
impl Drop for ServerConnection {
fn drop(&mut self) {
println!("ServerConnection dropped")
}
}