TCP/IP Architecture, Design and Implementation in Linux

This book provides thorough knowledge of Linux TCP/IP stack and kernel framework for its network stack, including complete knowledge of design and implementation. Starting with simple client-server socket programs and progressing to complex design and implementation of TCP/IP protocol in linux, this book provides different aspects of socket programming and major TCP/IP related algorithms. In addition, the text features netfilter hook framework, a complete explanation of routing sub-system, IP QOS implementation, and Network Soft IRQ. This book further contains elements on TCP state machine implementation,TCP timer implementation on Linux, TCP memory management on Linux, and debugging TCP/IP stack using lcrash

Auteur

Sameer Seth works at Juniper Networks as Senior Staff
Engineer for JUNOS Kernel Team. Previously, he was a senior
engineer at Sun Microsystems, where he worked on the TCP/IP stack
in Solaris, sockets, streams, NFS, and related kernel framework. He
has ten years of experience working with Linux in research and
commercial environments. He has also worked on embedded TCP/IP
Linux stack as well as on X86 architectures. Additionally, he has
worked on different communication protocols on Motorola MPC8260
processors. His community work includes blogging for opensolaris
technology (blogs.sun.com/sameer) and he delivers technical talks
on open solaris technology. In his spare time he enjoys writing and
talking on technical topics related to networking and Unix.

M. Ajaykumar Venkatesulu is currently working on
networking and naming services. He has seven years of experience
with Linux networking and kernel in research and commercial
environments. His areas of interest include Linux kernel, embedded
systems, IP routing, and IP QoS.

Texte du rabat
The only single-source reference on the concept and implementation of TCP/IP in Linux As open source software becomes a trusted part of business and research systems, it's no wonder that a combination of the Transmission Control Protocol/Internet Protocol (TCP/IP) and the Linux operating system is becoming more common. TCP/IP's prevalence allows easy communication among computers using various operating systems, whether Windows, Mac OS, Linux, or Unix. And Linuxbecause it is open source and thus modifiablehas become a frequent choice for developers who want a customizable operating system on which to build their applications.

This book describes the design and implementation of TCP/IP in Linux, from simple client-server applications to more complex executions. Topical coverage includes:

• Basic socket concepts and implementations

• The Linux implementation of network packets

• TCP read/write

• TCP algorithms for data transmission and congestion control

• TCP timers

• IP layer and routing tables implementation

• IP forwarding and quality of service implementation

• Netfilter hooks for the stacks

• Network Soft IRQ

• How to debug a TCP/IP stack

All topics are discussed in a concise, step-by-step manner and the book is complemented with helpful illustrations to give readers a better understanding of the subject. TCP/IP Architecture, Design, and Implementation in Linux is an indispensable resource for embedded-network product developers, network security product developers, IT network architects, researchers, and graduate students.

Contenu
Preface. Acknowledgments.

1. INTRODUCTION.

1.1 Overview of TCP/IP Stack.

1.2 Source Code Organization for Linux 2.4.20.

1.3 TCP/IP Stack and Kernel Control Paths.

1.4 Linux Kernel Until Version 2.4 Is Non-preemptible.

1.5 Linux Process and Thread.

1.6 Kernel Synchronization Mechanism.

1.7 Application Interfaces for TCP/IP Programming.

1.8 Shutdown.

1.9 I/O.

1.10 TCP State.

1.11 Summary.

2. PROTOCOL FUNDAMENTALS.

2.1 TCP.

2.2 TCP Options (RFC 1323).

2.3 TCP Data Flow.

2.4 Delayed Acknowledgment.

2.5 Nagle's Algorithm (RFC 896).

2.6 TCP Sliding Window Protocol.

2.7 Maximizing TCP Throughput.

2.8 TCP Timers.

2.9 TCP Congestion Control.

2.10 TCP Performance and Reliability.

2.11 IP (Internet Protocol).

2.12 Routing.

2.13 netstat.

2.14 traceroute.

2.15 ICMP.

2.16 ping.

2.17 ARP/RARP.

2.18 Summary.

3. KERNEL IMPLEMENTATION OF SOCKETS.

3.1 Socket Layer.

3.2 VFS and Socket.

3.3 Protocol Socket Registration.

3.4 struct inet_protosw.

3.5 Socket Organization in the Kernel.

3.6 Socket.

3.7 inet_create.

3.8 Flow Diagram for Socket Call.

3.9 Summary.

4. KERNEL IMPLEMENTATION OF TCP CONNECTION SETUP.

4.1 Connection Setup.

4.2 Bind.

4.3 Listen.

4.4 Connection Request Handling by Kernel.

4.5 Accept.

4.6 Client Side Setup.

4.7 Summary.

5. sk_buff AND PROTOCOL HEADERS.

5.1 struct sk_buff.

5.2 struct skb_shared_info.

5.3 sk_buff and DMASKB_FRAG_STRUCT.

5.4 Routines Operating on sk_buff.

5.5 sk_buff Builds Protocol Headers as It Traverses Down the Protocol Layers.

5.6 sk_buff Extracts Protocol Headers as It Traverses Up the Protocol Layers When a Packet Arrives.

5.7 Summary.

6. MOVEMENT OF sk_buff ACROSS PROTOCOL LAYERS.

6.1 Packet Traversing Down the TCP/IP Stack.

6.2 Routed Packet Ready for Transmission.

6.3 Kernel Flow for a Packet Moving Down the Stack.

6.4 Packet Traversing Up the TCP/IP Stack.

6.5 Kernel Flow for a Packet Moving Up the Stack.

6.6 Summary.

7. TCP SEND.

7.1 TCP Segmentation Unit for Sending Data.

7.2 Segmentation with ScatterGather Technique.

7.3 Sending OOB Data.

7.4 Flow for TCP Segmentation Unit and Send Process.

7.5 Functional Level Flow for Segmentation and Send Mechanism.

7.6 Summary.

8. TCP RECEIVE.

8.1 Queuing Mechanism.

8.2 Processing of TCP Data from the Receive Queue.

8.3 TCP Urgent Byte Processing.

8.4 DATA Flow Diagram for Receiving Data over the TCP Socket.

8.5 Summary.

9. TCP MEMORY MANAGEMENT.

9.1 Transmit Side TCP Memory Management.

9.2 Receive Side TCP Memory Management.

9.3 Freeing of Memory Allocated to a Receive Buffer.

9.4 System-Wide Control Parameters Are Worth Noticing When It Comes to TCP Memory Management.

9.5 Summary.

10. TCP TIMERS.

10.2 TCP Retransmit Timer.

10.3 Zero Window Probe Timer.

10.4 Delay ACK Timer. 10.5 Keepalive Timer.
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