说明：  Linux的网络协议栈是内核的一部分，它的实现是基于TCP/IP协议栈的，共分五层，分别是：应用层、BSD Socket层、INET Socket层、网络层和数据链接/硬件层。这是继承了unix的网络系统，现在linux的网络系统不断注入了新的理论。 我要研究的是linux下网络协议栈一个通信协议——TCP协议栈。TCP协议是面向对象的协议，本论文主要从缓存sk_buff，TCP相关数据结构，TCP连接的建立与关闭，TCP数据的发送与接收，TCP的流量控制与拥塞控制这几方面阐述我对TCP协议栈的理解，主要研究了TCP在内核中如何实现，以及一些算法的实现。
(Linux network protocol stack is a core part of its implementation is based on TCP/IP protocol stack is divided into five, namely: the application layer, BSD Socket Layer, INET Socket layer, network layer and data link/hardware layer. This is the inheritance of the unix network system, network system is linux and keep adding a new theory. I need to study is a network protocol stack under linux communication protocols- TCP protocol stack. TCP protocol is object-oriented protocol, this thesis from the cache sk_buff, TCP data structures, TCP connection establishment and closure, TCP send and receive data, TCP flow control and congestion control these areas and explain my TCP protocol understanding of the stack, a major study how TCP in the kernel, and some algorithm.)