add cli/feature: run multiple port

src/cli/cli_system.rs

-use clap::{command, Parser, Subcommand};
-
 use crate::{
     example::{Controller10, Controller13},
     openflow::{ofp10::ControllerFrame10, ofp13::ControllerFrame13},
 };
+use clap::{command, Parser, Subcommand};
+use std::thread;
 
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
@@ -18,8 +18,8 @@ enum Commands {
     Run {
         #[command(subcommand)]
         controller: Option<Controllers>,
-        #[arg(default_value_t = 6633, short = 'p', long)]
-        port: u16,
+        #[arg(default_values_t = [6633,6653], short = 'p', long, value_delimiter = ',')]
+        port: Vec<u16>,
         #[arg(
             default_value = "127.0.0.1",
             short = 'l',
@@ -47,14 +47,26 @@ pub fn system() {
             port,
             listen,
         } => {
-            let addr = format!("{}:{}", listen.as_str(), port.to_string());
-            match controller {
+            // creat runner function to run inside thread spawn
+            let runner = match controller {
                 Some(controller) => match controller {
-                    Controllers::Ctrl13 => Controller13::new().listener(&addr),
-                    Controllers::Ctrl10 => Controller10::new().listener(&addr),
+                    Controllers::Ctrl13 => |addr: &str| Controller13::new().listener(addr),
+                    Controllers::Ctrl10 => |addr: &str| Controller10::new().listener(addr),
                 },
                 // Set Default Controller at here
-                None => Controller13::new().listener(&addr),
+                None => |addr: &str| Controller13::new().listener(addr),
+            };
+            // spawn and run threads
+            let mut thread_list = Vec::new();
+            for p in port.iter() {
+                let addr = format!("{}:{}", listen, p);
+                let t = thread::spawn(move || {
+                    runner(&addr);
+                });
+                thread_list.push(t);
+            }
+            for th in thread_list {
+                let _ = th.join();
             }
         }
     }