Easycwmp source code analysis

One 、 Source code architecture composition

EasyCwmp The design consists of two parts ：
①EasyCwmp Core： It includes TR069 CWMP engine , And be responsible for working with ACS Server communication . Use C Language development .

②EasyCwmp DataModel： It contains TR-06 Of DATAModel, And meet some DataModel standard , for example TR-098,TR-181,TR-104 etc. . Use shell Development , Only some protocol models are supported , In the process of development and maintenance, the efficiency is relatively low .

Two 、EasyCwmp Source code composition

3、 ... and 、EasyCwmp File dependency

Four 、EasyCwmp Execute the process

Detailed code reference easycwmp.c Medium main function .

① Get input parameters

② Create a mutex lock , Set mutually exclusive file properties , Confirmed as root Sign in .

③ Memory allocation , Initialization of linked list ,uloop_init,xml Backup initialization .

④ Create child process 、 Two pipe The pipe replicates the parent-child process for communication , The subprocess is handed over to /usr/sbin/easycwmp The script program takes over , Prepare to deal with JSON Format parameters .

⑤ load easycwpm The configuration file , Initialize the device information through the configuration file ( Device type 、 Equipment manufacturer 、 Equipment serial number 、 Manufacturer's unique number ), Initialize heartbeat timer.

⑥ The test sends commands through the pipeline /usr/sbin/easycwmp Script program and exit it .

⑦ Add... According to the input parameters EVENT_BOOT or EVENT_PERIODIC The event to the evens list , Set up timer Callback handles events （ Start connection event ）.

⑧netlink_init,http_server_init Local service initialization .

⑨ Get into uloop_run Main circulation , Handling event messages .

5、 ... and 、RPC Method

The main introduction here is CPE On the device side RPC Call methods remotely ,ACS The server has RPC Method needs to view the configuration of the corresponding server .
stay EasyCwmp The source code has realized TR069 Commonly used in protocols RPC Method , The source code defines RPC Method in xml.c In file .