Linux Socket Programming by Example - II.pdf

Linux Socket Programming by Example

By WarrenW.Gay

Part I: Basic Socket Concepts

Chapter 1. Introducing Sockets

A Brief Historical Introduction

Understanding Sockets

Comparing Sockets to Pipes

Creating Sockets

Performing I/O on Sockets

Forming Local Addresses

Forming Internet (IPv4) Socket Addresses

Specifying an X.25 Address

Specifying Other Address Families

The AF_UNSPEC Address Family

Chapter 3. Address Conversion Functions

Internet IP Numbers

Allocating IP Addresses

Manipulating IP Numbers

Chapter 4. Socket Types and Protocols

Chapter 5. Binding Addresses to a Socket

The Purpose of the bind(2) Function

Using the bind(2) Function

Obtaining the Socket Address

Interfaces and Addressing

Chapter 6. Connectionless-Oriented Protocols

The Methods of Communication

Performing Input/Output of Datagrams

Writing a UDP Datagram Server

Writing a UDP Datagram Client

What's Next

Chapter 8. Connection-Oriented Protocols for Servers

Understanding the Role of the Server

The listen(2) Function

The accept(2) Function Call

Writing a TCP/IP Server

Modifying the Client Program

Chapter 9. Hostname and Network Name Lookups

Understanding the Need for Names

Using Separate Read and Write Streams

Winding Up Communications

Handling Interrupts

Defining Buffer Operation

Applying FILE Streams to Sockets

What's Next

Chapter 11. Concurrent Client Servers

Understanding the Multiple-Client Problem

Overview of Server Functions

Setting the SO_LINGER Option

Setting the SO_KEEPALIVE Option

Setting the SO_BROADCAST Option

Setting the SO_OOBINLINE Option

Options SO_PASSCRED and SO_PEERCRED

What's Next

Chapter 13. Broadcasting with UDP

Receiving Out-of-Band Data Inline

Limitations of the Urgent Mode Pointer

What's Next

Chapter 15. Using the inetd Daemon

Steps Common to Most Servers

What's Next

Chapter 17. Passing Credentials and File Descriptors

Problem Statement

Introducing Ancillary Data

Testing the Socket Server

Chapter 18. A Practical Network Project

Problem Statement

Solving the Quote Service Problem

What's Next

Standard I/O Support

Hostname Support

Appendix B. Socket-Related Structures Reference

Socket Address Structures

the world's first artificial satellite into the Earth's orbit, known as Sputnik. Approximately the size of a

basketball, this satellite took 98 minutes to orbit the Earth. Anyone with a shortwave radio was able

to hear it during overhead passes, at a frequency of approximately 40.002Mhz. Who would have

imagined at that time, that this would later spawn the beginnings of TCP/IP and the Internet?

In this chapter you will be introduced to

•

A brief history of how sockets were developed

•

The essence of sockets

•

How sockets are referenced by the Linux kernel and application programs

•