update readme and diagram

README.md

-# Tenjin SDN 
+# Tenjin SDN
 
 ## Goals
 
-To understand  The software-defined networking well, I trying to create a simple SDN with Rust language  to support Openflow 1.0 first and 1.3 later.
+To understand The software-defined networking well, I trying to create a simple SDN with Rust language to support Openflow 1.0 first and 1.3 later.
 
 ## TODOs
 
 - [x] design structure of code and working.
 - [x] test case. ([Read docs](https://doc.rust-lang.org/book/ch11-01-writing-tests.html))
 - [ ] write more description in README.
+- [ ] handle all messages.
 - [ ] remove all unwarp.
 
 ## Learning resources
@@ -26,10 +27,12 @@ To understand  The software-defined networking well, I trying to create a simple
 ```mermaid
 stateDiagram
 con: Controller
-conf: Controller frame
-ofp: Openflow Manager
-ofph: Openflow Header
-ofpe: Openflow Event Message
+conf10: Controller frame 10
+conf13: Controller frame 13
+
+ofp10: Openflow Manager 10
+ofp13: Openflow Manager 13
+
 ofpv10_h: openflow v1.0 header
 ofpv10_e: openflow v1.0 Event
 
@@ -37,15 +40,16 @@ ofpv13_h: openflow v1.3 header
 ofpv13_e: openflow v1.3 Event
 
 [*] --> con
-con --> conf
-conf --> ofp
-ofp --> ofph
-ofph --> ofpv10_h
-ofph --> ofpv13_h
-
-ofp --> ofpe
-ofpe --> ofpv10_e
-ofpe --> ofpv13_e
+con --> conf10
+conf10 --> ofp10
+ofp10 --> ofpv10_h
+ofp10 --> ofpv10_e
+
+con --> conf13
+conf13 --> ofp13
+ofp13 --> ofpv13_h
+ofp13 --> ofpv13_e
+
 ```
 
-</details>
+</details>
\ No newline at end of file