Christian Benvenuti

Understanding Linux Network Internals (eBook, ePUB)

Guided Tour to Networking on Linux

• Format: ePub

Produktbeschreibung

If you've ever wondered how Linux carries out the complicated tasks assigned to it by the IP protocols -- or if you just want to learn about modern networking through real-life examples -- Understanding Linux Network Internals is for you.Like the popular O'Reilly book, Understanding the Linux Kernel, this book clearly explains the underlying concepts and teaches you how to follow the actual C code that implements it. Although some background in the TCP/IP protocols is helpful, you can learn a great deal from this text about the protocols themselves and their uses. And if you already have a base knowledge of C, you can use the book's code walkthroughs to figure out exactly what this sophisticated part of the Linux kernel is doing.Part of the difficulty in understanding networks -- and implementing them -- is that the tasks are broken up and performed at many different times by different pieces of code. One of the strengths of this book is to integrate the pieces and reveal the relationships between far-flung functions and data structures. Understanding Linux Network Internals is both a big-picture discussion and a no-nonsense guide to the details of Linux networking. Topics include:Key problems with networkingNetwork interface card (NIC) device driversSystem initializationLayer 2 (link-layer) tasks and implementationLayer 3 (IPv4) tasks and implementationNeighbor infrastructure and protocols (ARP)BridgingRoutingICMPAuthor Christian Benvenuti, an operating system designer specializing in networking, explains much more than how Linux code works. He shows the purposes of major networking features and the trade-offs involved in choosing one solution over another. A large number of flowcharts and other diagrams enhance the book's understandability.

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Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 1066
• Erscheinungstermin: 29. Dezember 2005
• Englisch
• ISBN-13: 9780596552060
• Artikelnr.: 52965295

Autorenporträt

Christian Benvenuti received his masters degree in Computer Science at the University of Bologna in Italy. He collaborated for a few years with the International Center for Theoretical Physics (ICTP) in Trieste, where he developed ad-hoc software based on the Linux kernel, was a scientific consultant for a project on remote collaboration, and served as an instructor for several training sessions on networking. The trainings, held mainly in Europe, Africa, and South America wereall based on Linux systems and addressed to scientists from developing countries, where the ICTP has been promoting Linux for many years. He occasionally collaborates with a non-profit organization founded by ICTP members, Collaborium.org, to continue promoting Linux on developing countries.In the past few years he worked as a software engineer for Cisco Systems in the Silicon Valley, where he focused on Layer two switching, high availability, and network security.

Inhaltsangabe

Preface Part I. General Background 1. Introduction Basic Terminology Common Coding Patterns User-Space Tools Browsing the Source Code When a Feature Is Offered as a Patch 2. Critical Data Structures The Socket Buffer: sk_buff Structurenet_device Structure Files Mentioned in This Chapter 3. User-Space-to-Kernel Interface II. System Initialization 4. Notification Chains Reasons for Notification Chains Overview Defining a Chain Registering with a Chain Notifying Events on a Chain Notification Chains for the Networking SubsystemsTuning via /proc Filesystem Functions and Variables Featured in This Chapter Files and Directories Featured in This Chapter 5. Network Device Initialization System Initialization Overview Device Registration and Initialization Basic Goals of NIC Initialization Interaction Between Devices and KernelInitialization Options Module Options Initializing the Device Handling Layer: net_dev_init User-Space Helpers Virtual DevicesTuning via /proc Filesystem Functions and Variables Featured in This Chapter Files and Directories Featured in This Chapter 6. The PCI Layer and Network Interface Cards Data Structures Featured in This Chapter Registering a PCI NIC Device Driver Power Management and Wake-on-LAN Example of PCI NIC Driver Registration The Big PictureTuning via /proc Filesystem Functions and Variables Featured in This Chapter Files and Directories Featured in This Chapter 7. Kernel Infrastructure for Component Initialization Boot-Time Kernel Options Module Initialization Code Optimized Macro-Based Tagging Boot-Time Initialization RoutinesMemory OptimizationsTuning via /proc Filesystem Functions and Variables Featured in This Chapter Files and Directories Featured in This Chapter 8. Device Registration and Initialization When a Device Is Registered When a Device Is Unregistered Allocating net_device Structures Skeleton of NIC Registration and Unregistration Device InitializationOrganization of net_device Structures Device State Registering and Unregistering Devices Device Registration Device Unregistration Enabling and Disabling a Network Device Updating the Device Queuing Discipline State Configuring Device-Related Information from User Space Virtual Devices LockingTuning via /proc Filesystem Functions and Variables Featured in This Chapter Files and Directories Featured in This Chapter Part III. Transmission and Reception 9. Interrupts and Network Drivers Decisions and Traffic Direction Notifying Drivers When Frames Are Received