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//use std::io::BufWriter;
use std::result::Result;
use std::vec::Vec;
use std::convert::TryInto;
use std::io::Cursor;
use flate2::Compress;
use flate2::Decompress;
use flate2::Compression;
use flate2::FlushCompress;
use flate2::FlushDecompress;
use flate2::read::ZlibDecoder;
use tokio::net::TcpStream;
use tokio::net::tcp::{ReadHalf, WriteHalf};
use tokio::prelude::*;
use failure::Error;
extern crate log;
// use log::{info, warn, debug};
use crate::protocol::message;
pub enum State {
Handshake,
Connected
}
pub struct Client {
stream: TcpStream,
encoder: Compress,
decoder: Decompress,
state: State,
pub tls: bool,
pub compression: bool,
}
impl Client {
pub async fn handler(mut self) -> Result<(), Error> {
loop {
let mut buf: Vec<u8> = vec![0; 2048];
match self.stream.read(&mut buf).await {
Ok(n) => {
buf.truncate(n);
let mut cbuf: Vec<u8> = vec![0; n * 2];
let before_in = self.decoder.total_in();
let before_out = self.decoder.total_out();
self.decoder.decompress(&buf, &mut cbuf, FlushDecompress::None)?;
let after_in = self.decoder.total_in();
let after_out = self.decoder.total_out();
cbuf.truncate(after_out.try_into()?);
match self.state {
State::Handshake => handle_login_message(&mut self, &cbuf),
State::Connected => handle_login_message(&mut self, &cbuf)
}.await?;
}
Err(e) => { panic!(e) }
}
}
}
pub async fn connect(address: &'static str, port: u64, tls: bool, compression: bool) -> Result<Client, Error> {
use crate::protocol::primitive::deserialize::Deserialize;
use crate::protocol::message::ConnAck;
use crate::protocol::primitive::{StringList};
use crate::protocol::message::ClientInit;
use crate::protocol::message::handshake::HandshakeSerialize;
let mut s = TcpStream::connect(format!("{}:{}", address, port)).await?;
// Set Features
let mut init: Vec<u8> = vec![];
let mut handshake: u32 = 0x42b33f00;
if tls {
handshake |= 0x01;
}
if compression {
handshake |= 0x02;
}
let mut proto: u32 = 0x00000002;
let fin: u32 = 0x80000000;
proto |= fin;
init.extend(handshake.to_be_bytes().iter());
init.extend(proto.to_be_bytes().iter());
s.write(&init).await?;
let mut buf = [0; 4];
s.read(&mut buf).await?;
let (_, val) = ConnAck::parse(&buf).unwrap();
println!("Received: {:?}", val);
let mut client = Client {
stream: s,
state: State::Handshake,
encoder: Compress::new(Compression::best(), true),
decoder: Decompress::new(true),
tls: tls,
compression: compression,
};
let mut features = StringList::new();
features.push("SynchronizedMarkerLine".to_string());
features.push("Authenticators".to_string());
features.push("ExtendedFeatures".to_string());
let client_init = ClientInit {
client_version:String::from("Rust 0.0.0"),
client_date: String::from("1579009211"),
feature_list: features,
client_features: 0x00008000,
};
write_to_stream(&mut client, &client_init.serialize()?).await?;
return Ok(client);
}
// pub fn login(&mut self, user: &'static str, pass: &'static str, client: message::ClientInit) {
// use crate::protocol::message::handshake::{HandshakeDeserialize, HandshakeSerialize, HandshakeQRead, VariantMap};
// use crate::protocol::message::handshake::{ClientInitAck, ClientLogin, ClientLoginAck, SessionInit};
//
// self.write(&client.serialize().unwrap()).unwrap();
//
// let mut buf: Vec<u8> = [0; 2048].to_vec();
// let len = VariantMap::read(self, &mut buf).unwrap();
// buf.truncate(len);
// let res = ClientInitAck::parse(&buf).unwrap();
// println!("res: {:?}", res);
//
// let login = ClientLogin {user: user.to_string(), password: pass.to_string()};
// self.write(&login.serialize().unwrap()).unwrap();
// println!("res: {:?}", res);
//
// let mut buf: Vec<u8> = [0; 2048].to_vec();
// let len = VariantMap::read(self, &mut buf).unwrap();
// buf.truncate(len);
// let _res = ClientLoginAck::parse(&buf).unwrap();
//
// let mut buf: Vec<u8> = [0; 2048].to_vec();
// let len = VariantMap::read(self, &mut buf).unwrap();
// buf.truncate(len);
// let res = SessionInit::parse(&buf).unwrap();
//
// println!("res: {:?}", res);
// }
}
// impl std::io::Read for Client {
// fn read(&mut self, buf: &mut [u8]) -> Result<usize, Error> {
// let mut cbuf = [0; 2048].to_vec();
// let read_bytes = self.tcp_stream.read(&mut cbuf)?;
// println!("read bytes: {:?}", read_bytes);
// cbuf.truncate(read_bytes);
// println!("cbuf: {:?}", &cbuf[0..]);
// let before_in = self.decoder.total_in();
// let before_out = self.decoder.total_out();
// self.decoder.decompress(&cbuf, buf, FlushDecompress::None)?;
// let after_in = self.decoder.total_in();
// let after_out = self.decoder.total_out();
//
// println!("in: {:?} / {:?}\nout: {:?} / {:?}", before_in, after_in, before_out, after_out);
//
// println!("buf: {:?}", buf);
// return Ok(((after_in - after_out)).try_into().unwrap());
// //
// // let res = self.tcp_stream.read(buf);
// // println!("buf: {:?}, total in: {:?}, total out: {:?}", buf, self.tcp_stream.total_in(), self.tcp_stream.total_out());
// // return res;
// }
// }
//
// impl std::io::Write for Client {
// fn write(&mut self, buf: &[u8]) -> Result<usize, Error> {
// let mut cbuf = Vec::with_capacity(buf.len());
// self.encoder.compress_vec(buf, &mut cbuf, FlushCompress::Finish)?;
// return self.tcp_stream.write(&cbuf);
// }
//
// fn flush(&mut self) -> Result<(), Error> {
// return self.tcp_stream.flush();
// }
// }
pub async fn write_to_stream(client: &mut Client, buf: &[u8]) -> Result<usize, Error> {
let mut cbuf = vec![0; buf.len()];
let before_in = client.encoder.total_in();
let before_out = client.encoder.total_out();
client.encoder.compress(buf, &mut cbuf, FlushCompress::Full)?;
let after_in = client.encoder.total_in();
let after_out = client.encoder.total_out();
println!("out {:?} - {:?}", after_out, before_out);
cbuf.truncate((after_out - before_out).try_into()?);
println!("cbuf {:?}", cbuf);
let i = client.stream.write(&cbuf).await?;
return Ok(i);
}
pub async fn handle_login_message(client: &mut Client, buf: &[u8]) -> Result<(), Error> {
use crate::protocol::primitive::{Variant, StringList};
use crate::protocol::message::ClientLogin;
use crate::protocol::message::handshake::{HandshakeSerialize, HandshakeDeserialize, VariantMap};
use crate::protocol::error::ProtocolError;
use crate::util::get_msg_type;
let (_, res) = VariantMap::parse(buf)?;
println!("res {:?}", res);
let msgtype = get_msg_type(&res["MsgType"])?;
match msgtype {
"ClientInitAck" => {
let login = ClientLogin {user: "audron".to_string(), password: "audron".to_string()};
write_to_stream(client, &login.serialize()?).await?;
},
"ClientInitReject" => { println!("init failed: {:?}", res) },
"ClientLoginAck" => { println!("login done: {:?}", res) },
"ClientLoginReject" => { println!("login failed: {:?}", res)},
_ => bail!(ProtocolError::WrongMsgType)
}
return Ok(());
}
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