Add a range option to server to specify specific port client attribution

lib/ClientManager.js

@@ -3,6 +3,7 @@ import Debug from 'debug';
 
 import Client from './Client';
 import TunnelAgent from './TunnelAgent';
+import PortManager from "./PortManager";
 
 // Manage sets of clients
 //
@@ -13,6 +14,7 @@ class ClientManager {
 
         // id -> client instance
         this.clients = new Map();
+        this.portManager = new PortManager({range: this.opt.range||null})
 
         // statistics
         this.stats = {
@@ -39,6 +41,7 @@ class ClientManager {
 
         const maxSockets = this.opt.max_tcp_sockets;
         const agent = new TunnelAgent({
+            portManager: this.portManager,
             clientId: id,
             maxSockets: 10,
         });
@@ -79,6 +82,7 @@ class ClientManager {
         if (!client) {
             return;
         }
+        this.portManager.release(client.agent.port);
         --this.stats.tunnels;
         delete this.clients[id];
         client.close();