Add trace log for connecting, bump version to v1.8.4

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "shadowsocks-rust"
-version = "1.8.3"
+version = "1.8.4"
 authors = ["Y. T. CHUNG <zonyitoo@gmail.com>"]
 description = "shadowsocks is a fast tunnel proxy that helps you bypass firewalls."
 repository = "https://github.com/zonyitoo/shadowsocks-rust"

src/relay/tcprelay/utils.rs

@@ -2,6 +2,7 @@
 
 use std::{io, net::SocketAddr};
 
+use log::trace;
 use socket2::{Domain, SockAddr, Socket, Type};
 use tokio::net::TcpStream;
 
@@ -11,6 +12,8 @@ use tokio::net::TcpStream;
 pub async fn connect_tcp_stream(addr: &SocketAddr, outbound_addr: &Option<SocketAddr>) -> io::Result<TcpStream> {
     match *outbound_addr {
         None => {
+            trace!("Connecting {}", addr);
+
             // Connect with tokio's default API directly
             TcpStream::connect(addr).await
         }
@@ -18,6 +21,8 @@ pub async fn connect_tcp_stream(addr: &SocketAddr, outbound_addr: &Option<Socket
             // Create TcpStream manually from socket
             // These functions may not behave exactly the same as tokio's TcpStream::connect
 
+            trace!("Connecting {} from {}", addr, bind_addr);
+
             let socket = match *addr {
                 SocketAddr::V4(..) => Socket::new(Domain::ipv4(), Type::stream(), None)?,
                 SocketAddr::V6(..) => Socket::new(Domain::ipv6(), Type::stream(), None)?,