Limit the number of connections to a single port

[hack3rcon]

Hello,
Is it possible to limit the number of connections to a port? For example, one port accepts 10 connections and the other port accepts 20 connections.

Thank you.

[zonyitoo]

Well, you can add a limiter right after the accept() call in the server.

[hack3rcon]

Well, you can add a limiter right after the accept() call in the server.

Hello,
Can you show me an example?

[zonyitoo]

shadowsocks-rust/crates/shadowsocks-service/src/server/tcprelay.rs

Lines 68 to 102 in 1abf457

	loop {
	let flow_stat = self.context.flow_stat();
	let (local_stream, peer_addr) = match self
	.listener
	.accept_map(|s| MonProxyStream::from_stream(s, flow_stat))
	.await
	{
	Ok(s) => s,
	Err(err) => {
	error!("tcp server accept failed with error: {}", err);
	time::sleep(Duration::from_secs(1)).await;
	continue;
	}
	};
	if self.context.check_client_blocked(&peer_addr) {
	warn!("access denied from {} by ACL rules", peer_addr);
	continue;
	}
	let client = TcpServerClient {
	context: self.context.clone(),
	method: self.svr_cfg.method(),
	peer_addr,
	stream: local_stream,
	timeout: self.svr_cfg.timeout(),
	};
	tokio::spawn(async move {
	if let Err(err) = client.serve().await {
	debug!("tcp server stream aborted with error: {}", err);
	}
	});
	}

For example, add your limiter in this loop to limit TCP connections.

[hack3rcon]

Excuse me, do I have to change the source code?
My config is something like the below:

{
    "server": "1.2.3.4",
    "server_port": 80,
    "local_port": 1080,
    "password": "password",
    "method": "aes-256-gcm"
}

I just want two IP addresses to connect to port 80.

[zonyitoo]

Yes, there is no limiter builtin in this Project now.