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Network Programming with Perl

By Lincoln D. Stein

Published by Addison-Wesley Professional

Published Date: Dec 27, 2000

Table of Contents



Preface.

I. BASICS.

1. Input/Output Basics.

Perl and Networking.

Networking Made Easy.

Filehandles.

Using Object-Oriented Syntax with the IO::Handle and IO::File Modules.

Summary.

2. Processes, Pipes, and Signals.

Processes.

Pipes.

Signals.

Summary.

3. Introduction to Berkeley Sockets.

Clients, Servers, and Protocols.

Berkeley Sockets.

Socket Addressing.

A Simple Network Client.

Network Names and Services.

Network Analysis Tools.

Summary.

4. The TCP Protocol.

A TCP Echo Client.

Socket Functions Related to Outgoing Connections.

A TCP Echo Server.

Adjusting Socket Options.

Other Socket-Related Functions.

Exceptional Conditions during TCP Communications.

Summary.

5. The IO::Socket API.

Using IO::Socket.

IO::Socket Methods.

More Practical Examples.

Performance and Style.

Concurrent Clients.

Summary.

II. DEVELOPING CLIENTS FOR COMMON SERVICES.

6. FTP and Telnet.

Net::FTP.

Net::Telnet.

Summary.

7. SMTP: Sending Mail.

Introduction to the Mail Modules.

Net::SMTP.

MailTools.

MIME-Tools.

Summary.

8. POP, IMAP, and NNTP: Processing Mail and Netnews.

The Post Office Protocol.

The IMAP Protocol.

Internet News Clients.

A News-to-Mail Gateway.

Summary.

9. Web Clients.

Installing LWP.

LWP Basics.

LWP Examples.

Parsing HTML and XML.

Summary.

III. DEVELOPING TCP CLIENT/SERVER SYSTEMS.

10. Forking Servers and the inetd Daemon.

Standard Techniques for Concurrency.

Running Example: A Psychotherapist Server.

The Psychotherapist as a Forking Server.

A Client Script for the Psychotherapist Server.

Daemonization on UNIX Systems.

Starting Network Servers Automatically.

Using the inetd Super Daemon.

Summary.

11. Multithreaded Applications.

About Threads.

A Multithreaded Psychiatrist Server.

A Multithreaded Client.

Summary.

12. Multiplexed Applications.

A Multiplexed Client.

The IO::Select Module.

A Multiplexed Psychiatrist Server.

Summary.

13. Nonblocking I/O.

Creating Nonblocking I/O Handles.

Using Nonblocking Handles.

Using Nonblocking Handles with Line-Oriented I/O.

A Generic Nonblocking I/O Module.

Nonblocking Connects and Accepts.

Summary.

14. Bulletproofing Servers.

Using the System Log.

Setting User Privileges.

Taint Mode.

Using chroot().

Handling HUP and Other Signals.

Summary.

15. Preforking and Prethreading.

Preforking.

Prethreading.

Performance Measures.

Summary.

16. IO::Poll.

Using IO::Poll.

IO::Poll Methods.

A Nonblocking TCP Client Using IO::Poll.

Summary.

IV. ADVANCED TOPICS.

17. TCP Urgent Data.

"Out-of-Band" Data and the Urgent Pointer.

Using TCP Urgent Data.

The sockatmark() Function.

A Travesty Server.

Summary.

18. The UDP Protocol.

A Time of Day Client.

Creating and Using UDP Sockets.

UDP Errors.

Using UDP Sockets with IO::Socket.

Sending to Multiple Hosts.

UDP Servers.

Increasing the Robustness of UDP Applications.

Summary.

19. UDP Servers.

An Internet Chat System.

The Chat Client.

The Chat Server.

Detecting Dead Clients.

Summary.

20. Broadcasting.

Unicasting versus Broadcasting.

Broadcasting Explained.

Sending and Receiving Broadcasts.

Broadcasting Without the Broadcast Address.

Enhancing the Chat Client to Support Resource Discovery.

Summary.

21. Multicasting.

Multicast Basics.

Using Multicast.

Sample Multicast Applications.

Summary.

22. UNIX-Domain Sockets.

Using UNIX-Domain Sockets.

A "Wrap" Server.

Using UNIX-Domain Sockets for Datagrams.

Summary.

Appendix A. Additional Source Code.

Net::NetmaskLite (Chapter 3).

PromptUtil.pm (Chapters 8 and 9).

IO::LineBufferedSet (Chapter 13).

IO::LineBufferedSessionData (Chapter 13).

DaemonDebug (Chapter 14).

Text::Travesty (Chapter 17).

mchat_client.pl (Chapter 21).

Appendix B. Perl Error Codes and Special Variables.

System Error Constants.

Magic Variables Affecting I/O.

Other Perl Globals.

Appendix C. Internet Reference Tables.

Assigned Port Numbers.

Registered Port Numbers.

Internet Multicast Addresses.

Appendix D. Bibliography.

Index. 0201615711T04062001

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Network Programming with Perl

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