Linux内核中UDP数据包的路径 [英] Path of UDP packet in linux kernel

问题描述

我想在Linux内核中找到UDP数据包的路径.为此，我想阅读一些文档(我有此为止(这是针对TCP的)，然后在相关的内核函数中包含一些printk语句来确认这一点.我将通过重新编译内核代码来做到这一点.

I want to find the path of a UDP packet in the Linux kernel. For this, I want to read up on some documentation ( I have this so far, which is for TCP) and then have some printk statements in the relevant kernel functions to confirm that. I will do this by recompiling the kernel code.

这是解决方法吗?您有什么建议/参考吗?

Is this the way to go about it? Do you have any suggestions/references?

推荐答案

Linux网络堆栈是内核的重要组成部分，您需要花一些时间来研究它. 我认为这本书可能会有所帮助(针对较早的内核2.4和2.6，但是对于最新的内核3.x而言，逻辑保持不变):

The linux networking stack is a big piece of the kernel and you need to spend some time studying it. I think that this books may help (Focused on older kernels 2.4 and 2.6, but the logic remain the same for the latest kernels 3.x):

了解Linux网络内部知识

Linux网络体系结构-网络协议的设计和实现在Linux内核中

您也可以签出此链接:

http://e-university.wisdomjobs.com/linux/chapter-189-277/sending-the-data-from-the-socket-through-udp-and-tcp.html

http://www.linuxfoundation.org/collaborate/workgroups/networking/kernel_flow

http://wiki.openwrt.org/doc/networking/praxis

http://www.ibm.com/developerworks/linux/library/l-linux-networking-stack/?ca=dgr-lnxw01lnxNetStack

http://gicl.cs.drexel.edu/people /sevy/network/Linux_network_stack_walkthrough.html

您还需要浏览内核源代码:

You need also to browse the kernel source :

http://lxr.linux.no/#linux+v3.7.3/

使用此功能开始通往网络子系统: ip_rcv ，当数据包被调用时收到. 然后调用其他功能(ip_rcv_finish，ip_local_deliver和ip_local_deliver_finish =>此功能负责选择良好的传输层)

Begin your road to the network sub-system with this function : ip_rcv which is called when a packet is received. other functions are then called (ip_rcv_finish, ip_local_deliver and ip_local_deliver_finish=> This function is responsible for choosing the good transport layer)

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