build: version

Cargo.toml

@@ -27,3 +27,8 @@ ctor = "0.2.2"
 env_logger = "0.10.0"
 log = "0.4.18"
 tokio = { version = "1.28.2", features = ["net", "rt", "full"] }
+
+[profile.release]
+strip = true
+lto = true
+opt-level = 2

README.md

@@ -37,10 +37,12 @@ In pyads, connect to `ads-proxy`. For example, client 1 and 2 on a host:
 * client 1 `ams_net_id=10.10.10.10.1.1`
 * client 2 `ams_net_id=10.10.10.10.1.2`
 
-(Might need to add route entry in shell command with `-r` or in PLC configuration)
+Might need to add route entry in shell command with `-r` or in PLC configuration, see [default user and password][password]
+
+[password]: https://infosys.beckhoff.com/english.php?content=../content/1033/sw_os/2019206411.html&id=3176926840725427056
 
 ```shell
-ads-proxy -d 192.168.0.10:48898
+ads-proxy -r 10.10.10.10.1.1 192.168.0.10:48898
 ```
 
 ```python
@@ -55,6 +57,19 @@ with plc:
     ...
 ```
 
+## How it works
+
+```text
+client 1        --|
+10.10.10.10.1.1   |
+                  | multi-connections            one connection
+client 2        ---------------------> ads-proxy --------------> PLC
+10.10.10.10.1.2   |                    a.b.c.d          route 10.10.10.10.1.1
+                  |                                            a.b.c.d
+client n        --|   
+10.10.10.10.x.y
+```
+
 ## License
 
 MIT

src/main.rs

@@ -288,15 +288,15 @@ async fn main() -> Result<()> {
     // add extra route
     let plc_client = TcpStream::connect(plc_addr).await?;
     let local_addr = plc_client.local_addr().unwrap();
-    let proxy_host = args.host.unwrap_or(local_addr.ip().to_string());
-    log::debug!("add route, host {}", proxy_host);
+    let host = args.host.unwrap_or(local_addr.ip().to_string());
+    log::debug!("add route, host {}", host);
     if let Some(ams_net_id) = args.route {
         log::info!("add route {} to plc", ams_net_id);
         let route_name = format!("route-{}", ams_net_id);
         if let Err(e) = ads::udp::add_route(
             (&plc_addr.ip().to_string(), ads::UDP_PORT),
             ams_net_id.into(),
-            &proxy_host,
+            &host,
             Some(&route_name),
             username.as_deref(),
             password.as_deref(),
@@ -309,8 +309,8 @@ async fn main() -> Result<()> {
     // connect plc backend
     log::info!("connecting plc {}...", plc_addr);
     let plc_client = TcpStream::connect(plc_addr).await?;
-    let (mut plc_read, plc_write) = plc_client.into_split();
-    let plc_write = Arc::new(Mutex::new(plc_write));
+    let (mut plc_read, plc_write) = plc_client.into_split(); // split
+    let plc_write = Arc::new(Mutex::new(plc_write)); // shared plc write half
 
     // listen for client
     log::info!("listening {}...", args.listen_addr);