# leshan-analysis

**Repository Path**: JJput/leshan-analysis

## Basic Information

- **Project Name**: leshan-analysis
- **Description**: leshan代码阅读，并注解
- **Primary Language**: Unknown
- **License**: EPL-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 2
- **Created**: 2021-09-17
- **Last Updated**: 2025-05-09

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

![Leshan](https://eclipse.org/leshan/img/multicolor-leshan.png)

[Eclipse Leshan™](https://eclipse.org/leshan) is an OMA Lightweight M2M server and client Java implementation.

[What is OMA LWM2M ?](https://omaspecworks.org/what-is-oma-specworks/iot/lightweight-m2m-lwm2m/)  
[Object and Resource Registry](http://www.openmobilealliance.org/wp/OMNA/LwM2M/LwM2MRegistry.html).  


拆解leshan项目笔记，为了方便理解，在相关代码处加上了相关知识点注释。 仅供参考！！

LeshanServerDemo
-----------------------

![](https://jjput-halo.oss-cn-guangzhou.aliyuncs.com/markdown20210917170621.png)

LeshanServerDemo main中主要对LeshanServer(coap关键实现)和JettyServer(容器服务)进行初始化配置
。

JmDNS应该是用来实现局域网组网的。

下面详细拆解一下LeshanServer&JettyServer具体都做了些什么

### LeshanServer

* coap config配置：这就不解释了，来用leshan的应该都是冲coap的吧
* DTLS config配置：DTLS是运行于UDP协议之上的安全通信协议，详情可以看书密码技术与物联网安全mbedtls开发实战(徐凯 崔红鹏) 附上PDF:https://www.ixiera.com/uploads/soft/210730/1-210I0112S3.pdf
* Model init：这里的模型，应该是各种数据模型，比如：温度模型，规定了上下限值，以及随机数据规则等。

### JettyServer

本地leshan演示
-----------------------
Get and run the last binary of our demo **server** :
```
wget https://ci.eclipse.org/leshan/job/leshan/lastSuccessfulBuild/artifact/leshan-server-demo.jar
java -jar ./leshan-server-demo.jar
```
Get and run the last binary of our demo **client** :
```
wget https://ci.eclipse.org/leshan/job/leshan/lastSuccessfulBuild/artifact/leshan-client-demo.jar
java -jar ./leshan-client-demo.jar
```
Get and run the last binary of our **bootstrap** demo server :
```
wget https://ci.eclipse.org/leshan/job/leshan/lastSuccessfulBuild/artifact/leshan-bsserver-demo.jar
java -jar ./leshan-bsserver-demo.jar
```
:information_source: : _All the demos have a `--help` option._

Compile Leshan & Run Demos
-------------
Get sources :
```bash
#using ssh
git clone git@github.com:eclipse/leshan.git
```
or
```
#using https
git clone https://github.com/eclipse/leshan.git

```

Compile it, by running in leshan root folder :

```
mvn clean install
```

Run demo **server**:
```
java -jar leshan-server-demo/target/leshan-server-demo-*-SNAPSHOT-jar-with-dependencies.jar 
```

Connect on Leshan demo UI: http://localhost:8080  
Leshan server Demo provides a very simple UI to get the list of connected clients and interact with clients resources.

Now you can register a LWM2M client by running our **client** demo:
```
java -jar leshan-client-demo/target/leshan-client-demo-*-SNAPSHOT-jar-with-dependencies.jar 
```
or trying the [Eclipse Wakaama](http://eclipse.org/wakaama) test client.

You can also try our **bootstrap** demo server:
```
java -jar leshan-bsserver-demo/target/leshan-bsserver-demo-*-SNAPSHOT-jar-with-dependencies.jar 
```

Let's start to code !
---------------------
Now you played a bit with our demo, you should start to code your own server or client using our [Getting-started](https://github.com/eclipse/leshan/wiki/Getting-started) guide.