Move TCP tunneling code to separate module

src/tunnel/mod.rs

@@ -0,0 +1,29 @@
+use std::net::IpAddr;
+use std::sync::Arc;
+
+use crate::config::{PortForwardConfig, PortProtocol};
+use crate::port_pool::PortPool;
+use crate::wg::WireGuardTunnel;
+
+mod tcp;
+
+pub async fn port_forward(
+    port_forward: PortForwardConfig,
+    source_peer_ip: IpAddr,
+    port_pool: Arc<PortPool>,
+    wg: Arc<WireGuardTunnel>,
+) -> anyhow::Result<()> {
+    info!(
+        "Tunneling {} [{}]->[{}] (via [{}] as peer {})",
+        port_forward.protocol,
+        port_forward.source,
+        port_forward.destination,
+        &wg.endpoint,
+        source_peer_ip
+    );
+
+    match port_forward.protocol {
+        PortProtocol::Tcp => tcp::tcp_proxy_server(port_forward, port_pool, wg).await,
+        PortProtocol::Udp => Err(anyhow::anyhow!("UDP isn't supported just yet.")),
+    }
+}