颜晨 陈翔 孙云华
（中科芯集成电路有限公司，江苏 无锡 214072）
摘要：LwIP作为轻量化的网络协议栈在嵌入式设备中应用广泛。该文研究LwIP协议栈的内部数据管理方法，以便更好地应用及开发新的协议栈。首先，介绍LwIP协议栈的数据存储方法，并与FreeRTOS存储方法进行对比；然后，针对网络设备传输能力不同造成的数据包分片问题，探讨LwIP协议栈组成完整数据包采用的数据管理方法；最后，研究LwIP协议栈在TCP层的软件设计思路。
关键词：LwIP协议栈；内存管理；数据管理；数据存储
中图分类号：TP316.8 文献标志码：A 文章编号：1674-2605(2024)01-0003-05
DOI：10.3969/j.issn.1674-2605.2024.01.003
Study on the Internal Data Management Methods of LwIP Protocol Stack
YAN Chen CHEN Xiang SUN Yunhua
(China Key System & Integrated Circuit Co., Ltd., Wuxi 214072, China)
Abstract: LwIP is widely used as a lightweight network protocol stack in embedded devices. This article studies the internal data management methods of the LwIP protocol stack in order to better apply and develop new protocol stacks. Firstly, introduce the data storage method of the LwIP protocol stack and compare it with the FreeRTOS storage method; Then, in response to the data packet fragmentation problem caused by different transmission capabilities of network devices, explore the data management methods used to form a complete data packet using the LwIP protocol stack; Finally, study the software design approach of the LwIP protocol stack at the TCP layer.
Keywords: light weight IP (LwIP); memory management; data management; data storage
