use same controller in multi thread and it don't need to create new Controller in thread

src/controller.rs

+#![allow(unused)]
+#![allow(unused_variables)]
+/**
+ * Here is Controller you can modify and write the process or more you need.
+ * In production please remove allow unused.
+ */
+use crate::openflow::events::PacketInEvent;
+use crate::openflow::{controller_frame::ControllerFrame, traiter::OfpMsgEvent};
+use std::{collections::HashMap, net::TcpStream};
+
+pub struct Controller<OME: OfpMsgEvent> {
+    ofp: OME,
+    mac_to_port: HashMap<u64, u16>,
+}
+
+impl<OME: OfpMsgEvent> ControllerFrame<OME> for Controller<OME> {
+    fn get_ofp(&self) -> &impl OfpMsgEvent {
+        &self.ofp
+    }
+    fn new(ofp: OME) -> Self {
+        Self {
+            ofp,
+            mac_to_port: HashMap::new(),
+        }
+    }
+    /**
+     * Start here for handle packetIn message.
+     */
+    fn packet_in_handler(&mut self, xid: u32, packetin: PacketInEvent, stream: &mut TcpStream) {}
+}

src/lib.rs

@@ -2,4 +2,5 @@ pub mod openflow;
 
 pub mod etherparser;
 
-mod tcp_listener;
\ No newline at end of file
+pub mod controller;
+pub use controller::Controller;
\ No newline at end of file

src/main.rs

-use tenjin::openflow::messages::Openflow10;
-use tenjin::openflow::Controller;
+use tenjin::{
+    openflow::{controller_frame::ControllerFrame, ofp_v1_0::Openflow10},
+    Controller,
+};
 
 extern crate byteorder;
 
 fn main() -> Result<(), std::io::Error> {
+    // Controller::listener("127.0.0.1:6633", Openflow10::new());
+    // tcp_listener_handler(Controller::new(Openflow10), "127.0.0.1:6633");
     Controller::listener("127.0.0.1:6633", Openflow10::new());
     Ok(())
 }

src/openflow/controller.rs → src/openflow/controller_frame.rs

 use std::{
-    collections::HashMap,
     io::{Read, Write},
     net::TcpStream,
 };
 
-use crate::tcp_listener::tcp_listener_handler;
-
 use super::{
     events::PacketInEvent,
     messages::{
         traiter::{MessageMarshal, OfpMsgEvent},
         OfpMsg,
     },
-    OfpHeader,
+    tcp_listener_handler, OfpHeader,
 };
 
-pub struct Controller<OME: OfpMsgEvent> {
-    pub ofp: OME,
-    mac_to_port: HashMap<u64, u16>,
-}
-
-impl<OME: OfpMsgEvent> Controller<OME> {
-    pub const OFP_1_0: u8 = 1;
-    pub fn new(ofp: OME) -> Self {
-        Self {
-            ofp,
-            mac_to_port: HashMap::new(),
-        }
-    }
+pub trait ControllerFrame<OME: OfpMsgEvent> {
+    fn get_ofp(&self) -> &impl OfpMsgEvent;
+    fn packet_in_handler(&mut self, xid: u32, packetin: PacketInEvent, stream: &mut TcpStream);
+    fn new(ofp: OME) -> Self;
     
-    pub fn listener(address: &str, ofp: OME) {
-        tcp_listener_handler(ofp.version() as u8, address);
+    fn listener(address: &str, ofp: OME) {
+        tcp_listener_handler::<OME>(address, ofp.version() as u8);
     }
 
-    pub fn request_handler(&mut self, buf: &mut Vec<u8>, stream: &mut TcpStream) {
+    fn request_handler(&mut self, buf: &mut Vec<u8>, stream: &mut TcpStream) {
+        let ofp = self.get_ofp();
         let ofp_header = OfpHeader::parse(&buf);
         let mut payload = vec![0u8; ofp_header.pkt_size()];
         let _ = stream.read(&mut payload);
-        let message = self.ofp.msg_parse(ofp_header.message as u16);
+        let message = ofp.msg_parse(ofp_header.message as u16);
         match message {
-            OfpMsg::Hello => self.send_msg(self.ofp.fetures_req(), ofp_header.xid, stream),
+            OfpMsg::Hello => self.send_msg(ofp.fetures_req(), ofp_header.xid, stream),
             OfpMsg::FeaturesReq => todo!(),
             OfpMsg::PacketIn => {
                 self.packet_in_handler(ofp_header.xid, PacketInEvent::parse(&payload), stream);
@@ -49,34 +38,16 @@ impl<OME: OfpMsgEvent> Controller<OME> {
         }
     }
 
-    pub fn send_msg<T: MessageMarshal>(&self, msg: T, xid: u32, stream: &mut TcpStream) {
+    fn send_msg<MSM: MessageMarshal>(&self, msg: MSM, xid: u32, stream: &mut TcpStream) {
+        let ofp = self.get_ofp();
         let mut header_bytes: Vec<u8> = Vec::new();
         let mut body_bytes: Vec<u8> = Vec::new();
 
         msg.marshal(&mut body_bytes);
-        let ofp_header =
-            self.ofp
-                .header(msg.msg_usize(&self.ofp) as u8, body_bytes.len() as u16, xid);
+        let ofp_header = ofp.header(msg.msg_usize(ofp) as u8, body_bytes.len() as u16, xid);
         ofp_header.marshal(&mut header_bytes);
         header_bytes.append(&mut body_bytes);
         let _ = stream.write_all(&header_bytes);
     }
-
-    /**
-     * example of sending message
-     */
-    pub fn hello(&self, stream: &mut TcpStream) {
-        let hello_msg = self.ofp.hello_event();
-        self.send_msg(hello_msg, 0, stream);
-    }
-
-    pub fn fetures_req(&self, xid: u32, stream: &mut TcpStream) {
-        let fetreq_msg = self.ofp.fetures_req();
-        self.send_msg(fetreq_msg, xid, stream);
-    }
-
-    pub fn packet_in_handler(&mut self, xid: u32, packetin: PacketInEvent, stream: &mut TcpStream) {
-        let ether = packetin.payload;
-        self.mac_to_port.insert(ether.mac_src, packetin.port);
-    }
 }
+

src/openflow/messages/ofp_v1_0.rs

@@ -25,7 +25,9 @@ impl OfpMsgEvent for Openflow10 {
     fn fetures_req(&self) -> FeaturesReq {
         FeaturesReq::new()
     }
-
+    fn ofp_version() -> usize {
+        1
+    }
     fn version(&self) -> usize {
         1
     }

src/openflow/messages/traiter.rs

@@ -22,6 +22,7 @@ pub trait MessageMarshal {
 pub trait OfpMsgEvent {
     fn header(&self, message: u8, length: u16, xid: u32) -> OfpHeader;
     fn version(&self) -> usize;
+    fn ofp_version() -> usize;
     fn header_size(&self) -> usize;
 
     fn msg_usize(&self, msg: OfpMsg) -> usize;

src/openflow/mod.rs

 pub mod header;
 pub use header::OfpHeader;
 
-pub mod controller;
-pub use controller::Controller;
+pub mod controller_frame;
 
 pub mod events;
 
@@ -11,3 +10,6 @@ pub use ofp_port::{OfpPort, PseudoPort};
 
 pub mod messages;
 pub use messages::{ofp_v1_0, traiter};
+
+pub mod tcp_listener;
+pub use tcp_listener::tcp_listener_handler;
\ No newline at end of file

src/tcp_listener.rs → src/openflow/tcp_listener.rs

-use crate::ofp_from_version;
-use crate::openflow::{messages::Openflow10, traiter::OfpMsgEvent, Controller};
+use crate::openflow::{messages::Openflow10, traiter::OfpMsgEvent};
+use crate::{ofp_from_version, Controller};
+use std::sync::{Arc, Mutex};
 use std::{io::Read, net::TcpListener, thread};
 
-pub fn tcp_listener_handler(ofp_version: u8, address: &str) {
+use super::controller_frame::ControllerFrame;
+use super::events::HelloEvent;
+
+pub fn tcp_listener_handler<OME: OfpMsgEvent>(address: &str, ofp_version: u8) {
+    let controller = Arc::new(Mutex::from(Controller::new(ofp_from_version!(ofp_version))));
     let listener = TcpListener::bind(address).unwrap();
     for stream in listener.incoming() {
         match stream {
             Ok(mut stream) => {
+                let controller_clone = controller.clone();
                 thread::spawn(move || {
-                    /*
-                     * when spawn new thread.
-                     * The Controller will be create.
-                     */
-                    let mut controller = Controller::new(ofp_from_version!(ofp_version));
-                    controller.hello(&mut stream);
-                    let mut buffer = vec![0u8; controller.ofp.header_size()];
+                    controller_clone
+                        .lock()
+                        .unwrap()
+                        .send_msg(HelloEvent::new(), 0, &mut stream);
+                    let ofp_size = controller_clone.lock().unwrap().get_ofp().header_size();
+                    // let ofp = controller.lock().unwrap().get_ofp();
+                    let mut buffer = vec![0u8; ofp_size];
                     loop {
                         match stream.read(&mut buffer) {
                             Ok(v) if v > 0 => {
-                                controller.request_handler(&mut buffer, &mut stream);
+                                controller_clone
+                                    .lock()
+                                    .unwrap()
+                                    .request_handler(&mut buffer, &mut stream);
                             }
                             Ok(_) | Err(_) => break,
                         }