https://github.com/obgnail/udp-hole-punching-toy

UDP打洞
https://github.com/obgnail/udp-hole-punching-toy

golang network udp udp-hole-punching

Last synced: 9 days ago
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UDP打洞

• Host: GitHub
• URL: https://github.com/obgnail/udp-hole-punching-toy
• Owner: obgnail
• Created: 2022-05-15T05:07:31.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2022-05-16T18:45:54.000Z (over 2 years ago)
• Last Synced: 2024-06-21T16:57:39.370Z (5 months ago)
• Topics: golang, network, udp, udp-hole-punching
• Language: Go
• Homepage:
• Size: 10.7 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## udp打洞玩具

1. UDP 打洞

2. 将打好的洞转为 TCP，并且新增一个新的 UDP 打洞端口作为原先端口的替代

3. 提供本地端口代理

## usage

```

python3 -m http.server 7777

cd demo/server && go run *.go -serverPort=7788

cd demo/peer && go run *.go -id=HTTP_SERVER -passive=true -serverIP=127.0.0.1 -serverPort=7788 -proxyPort=7777 

cd demo/peer && go run *.go -choose=HTTP_SERVER -passive=false -serverIP=127.0.0.1 -serverPort=7788 -proxyPort=6666 

curl http://127.0.0.1:6666

```

## sequenceDiagram

```mermaid

sequenceDiagram

		autonumber

    participant Local

    participant peerClient

    participant Server

    participant peerServer

    participant NAS

    

    Note over Local, NAS: 准备阶段

    Server ->> Server: 监听UDP注册端口

    peerServer ->> Server: 注册ID,Addr

		par par and loop

   		peerServer ->> Server: 发送heartbeat

   	end

   	

    Note over Local, NAS: 连接阶段

   	peerClient ->> Server: 注册,请求连接到其他peer

   	Server -->> peerClient: 返回peer List

   	peerClient ->> peerClient: 选择一个peer

   	

   	par 打洞

   		peerClient -x peerServer: 请求server端口(打通C->S的NAT)

      peerClient ->> Server: 请求打洞到peerServer

      Server ->> peerServer: 命令Server连接到Client

      peerServer ->> peerClient: 连接到client(打通S->C的NAT)

   	end

   	

   	loop UDP通讯若干次(确保网络通讯顺畅)

   		peerClient ->> peerServer: heatbeat

   		peerServer ->> peerClient: answer heartbeat

   	end

   	

   	peerServer ->> peerServer: 生成新的peerServer,监听其他端口

   	peerServer ->> Server: 注册新的Server(回到步骤2)

   	peerServer ->> peerServer: UDP -> TCP.listen TCP

   	peerServer ->> NAS: 开启本地端口

   	NAS -->> peerServer: 返回localConn

   	peerClient ->> peerClient: UDP -> TCP

   	peerClient ->> peerServer: Dail Server TCP(serverConn)

   	par

   		peerServer ->> peerServer: Join ServerConn and LocalConn

   	end

   	peerClient ->> peerClient: Listen Proxy TCP

   	

   	Note over Local, NAS: 使用阶段

   	Local ->> peerClient: Dial Proxy TCP

   	par

   		peerClient ->> peerClient: Join ServerConn and ProxyConn

   	end

```