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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 networking Network interface card (NIC) device drivers System initialization Layer 2 (link-layer) tasks and implementation Layer 3 (IPv4) tasks and implementation Neighbor infrastructure and protocols (ARP) Bridging Routing ICMP Author 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. Understanding Linux Network Internals Preface I. General Backround 1. Introduction 2. Critical Data Structures 3. User-Space-to-Kernel Interface II. System Initialization 4. Notification Chains 5. Network Device Initialization 6. The PCI Layer and Network Interface Cards 7. Kernel Infrastructure for Component Initialization 8. Device Registration and Initialization III. Transmission and Reception 9. Interrupts and Network Drivers 10. Frame Reception 11. Frame Transmission 12. General and Reference Material About Interrupts 13. Protocol Handlers IV. Bridging 14. Bridging: Concepts 15. Bridging: The Spanning Tree Protocol 16. Bridging: Linux Implementation 17. Bridging: Mi scellaneous Topics V. Internet Protocol Version 4(IPv4) 18. Internet Protocol Version 4(IPv4): Concepts 19. Internet Protocol Version 4(IPv4): Linux Foundations and Features 20. Internet Protocol Version 4(IPv4): Forwarding and Local Delivery 21. Internet Protocol Version 4(IPv4): Transmission 22. Internet Protocol Version 4(IPv4): Handling Fragnentation 23. Internet Protocol Version 4(IPv4): Mi scellaneous Topics 24. Layer Four Protocol and Raw IP Handling 25. Internet Control Message Protocol (IOMPv4) VI. Nei ghboring Subsystem 26. Nei ghboring Subsystem: Concepts 27. Nei ghboring Subsystem: Infrastructure 28. Nei ghboring Subsystem: Address Resolution Protocol (ARP) 29. Nei ghboring Subsystem: Miscellaneous Topics VII. Routing 30. Routing: Concepts 31. Routing: Advanced 32. Routing: Li nux Implementation 33. Routing: The Routing Cache 34. Routing: Routing Tables 35. Routing: Lookups 36. Routing: Miscellaneous Topics