Add configurable control port option

src/client.rs

@@ -8,7 +8,7 @@ use tracing::{error, info, info_span, warn, Instrument};
 use uuid::Uuid;
 
 use crate::auth::Authenticator;
-use crate::shared::{ClientMessage, Delimited, ServerMessage, CONTROL_PORT, NETWORK_TIMEOUT};
+use crate::shared::{ClientMessage, Delimited, ServerMessage, NETWORK_TIMEOUT};
 
 /// State structure for the client.
 pub struct Client {
@@ -29,6 +29,9 @@ pub struct Client {
 
     /// Optional secret used to authenticate clients.
     auth: Option<Authenticator>,
+
+    /// TCP port used for control connections with the server.
+    control_port: u16,
 }
 
 impl Client {
@@ -39,8 +42,9 @@ impl Client {
         to: &str,
         port: u16,
         secret: Option<&str>,
+        control_port: u16,
     ) -> Result<Self> {
-        let mut stream = Delimited::new(connect_with_timeout(to, CONTROL_PORT).await?);
+        let mut stream = Delimited::new(connect_with_timeout(to, control_port).await?);
         let auth = secret.map(Authenticator::new);
         if let Some(auth) = &auth {
             auth.client_handshake(&mut stream).await?;
@@ -66,6 +70,7 @@ impl Client {
             local_port,
             remote_port,
             auth,
+            control_port,
         })
     }
 
@@ -104,7 +109,7 @@ impl Client {
 
     async fn handle_connection(&self, id: Uuid) -> Result<()> {
         let mut remote_conn =
-            Delimited::new(connect_with_timeout(&self.to[..], CONTROL_PORT).await?);
+            Delimited::new(connect_with_timeout(&self.to[..], self.control_port).await?);
         if let Some(auth) = &self.auth {
             auth.client_handshake(&mut remote_conn).await?;
         }

src/main.rs

@@ -34,6 +34,10 @@ enum Command {
         /// Optional secret for authentication.
         #[clap(short, long, env = "BORE_SECRET", hide_env_values = true)]
         secret: Option<String>,
+
+        /// TCP port used for control connections with the server.
+        #[clap(long, default_value_t = 7835, env = "BORE_CONTROL_PORT")]
+        control_port: u16,
     },
 
     /// Runs the remote proxy server.
@@ -57,6 +61,10 @@ enum Command {
         /// IP address where tunnels will listen on, defaults to --bind-addr.
         #[clap(long)]
         bind_tunnels: Option<IpAddr>,
+
+        /// TCP port used for control connections with clients.
+        #[clap(long, default_value_t = 7835, env = "BORE_CONTROL_PORT")]
+        control_port: u16,
     },
 }
 
@@ -69,8 +77,9 @@ async fn run(command: Command) -> Result<()> {
             to,
             port,
             secret,
+            control_port,
         } => {
-            let client = Client::new(&local_host, local_port, &to, port, secret.as_deref()).await?;
+            let client = Client::new(&local_host, local_port, &to, port, secret.as_deref(), control_port).await?;
             client.listen().await?;
         }
         Command::Server {
@@ -79,6 +88,7 @@ async fn run(command: Command) -> Result<()> {
             secret,
             bind_addr,
             bind_tunnels,
+            control_port,
         } => {
             let port_range = min_port..=max_port;
             if port_range.is_empty() {
@@ -89,6 +99,7 @@ async fn run(command: Command) -> Result<()> {
             let mut server = Server::new(port_range, secret.as_deref());
             server.set_bind_addr(bind_addr);
             server.set_bind_tunnels(bind_tunnels.unwrap_or(bind_addr));
+            server.set_control_port(control_port);
             server.listen().await?;
         }
     }

src/server.rs

@@ -12,7 +12,7 @@ use tracing::{info, info_span, warn, Instrument};
 use uuid::Uuid;
 
 use crate::auth::Authenticator;
-use crate::shared::{ClientMessage, Delimited, ServerMessage, CONTROL_PORT};
+use crate::shared::{ClientMessage, Delimited, ServerMessage, DEFAULT_CONTROL_PORT};
 
 /// State structure for the server.
 pub struct Server {
@@ -30,6 +30,9 @@ pub struct Server {
 
     /// IP address where tunnels will listen on.
     bind_tunnels: IpAddr,
+
+    /// TCP port used for control connections with clients.
+    control_port: u16,
 }
 
 impl Server {
@@ -42,6 +45,7 @@ impl Server {
             auth: secret.map(Authenticator::new),
             bind_addr: IpAddr::V4(Ipv4Addr::UNSPECIFIED),
             bind_tunnels: IpAddr::V4(Ipv4Addr::UNSPECIFIED),
+            control_port: DEFAULT_CONTROL_PORT,
         }
     }
 
@@ -55,11 +59,16 @@ impl Server {
         self.bind_tunnels = bind_tunnels;
     }
 
+    /// Set the TCP port used for control connections with clients.
+    pub fn set_control_port(&mut self, control_port: u16) {
+        self.control_port = control_port;
+    }
+
     /// Start the server, listening for new connections.
     pub async fn listen(self) -> Result<()> {
         let this = Arc::new(self);
-        let listener = TcpListener::bind((this.bind_addr, CONTROL_PORT)).await?;
-        info!(addr = ?this.bind_addr, "server listening");
+        let listener = TcpListener::bind((this.bind_addr, this.control_port)).await?;
+        info!(addr = ?this.bind_addr, port = this.control_port, "server listening");
 
         loop {
             let (stream, addr) = listener.accept().await?;

src/shared.rs

@@ -11,8 +11,8 @@ use tokio_util::codec::{AnyDelimiterCodec, Framed, FramedParts};
 use tracing::trace;
 use uuid::Uuid;
 
-/// TCP port used for control connections with the server.
-pub const CONTROL_PORT: u16 = 7835;
+/// Default TCP port used for control connections with the server.
+pub const DEFAULT_CONTROL_PORT: u16 = 7835;
 
 /// Maximum byte length for a JSON frame in the stream.
 pub const MAX_FRAME_LENGTH: usize = 256;