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TCP.IP.Sockets.in.Java.2nd.Edition.pdf

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TCP/IP Sockets in Java Second Edition
The Morgan Kaufmann Practical Guides Series Series Editor: Michael J. Donahoo TCP/IP Sockets in Java: Practical Guide for Programmers, Second Edition Kenneth L. Calvert and Michael J. Donahoo SQL: Practical Guide for Developers Michael J. Donahoo and Gregory Speegle C# 2.0: Practical Guide for Programmers Michel de Champlain and Brian Patrick Multi-Tier Application Programming with PHP: Practical Guide for Architects and Programmers David Wall TCP/IP Sockets in C#: Practical Guide for Programmers David Makofske, Michael J. Donahoo, and Kenneth L. Calvert Java Cryptography Extensions: Practical Guide for Programmers Jason Weiss JSP: Practical Guide for Programmers Robert Brunner JSTL: Practical Guide for JSP Programmers Sue Spielman Java: Practical Guide for Programmers Michael Sikora Multicast Sockets: Practical Guide for Programmers David Makofske and Kevin Almeroth The Struts Framework: Practical Guide for Java Programmers Sue Spielman TCP/IP Sockets in C: Practical Guide for Programmers Kenneth L. Calvert and Michael J. Donahoo JDBC: Practical Guide for Java Programmers Gregory Speegle For further information on these books and for a list of forthcoming titles, please visit our Web site at http://www.mkp.com.
TCP/IP Sockets in Java Practical Guide for Programmers Second Edition Kenneth L. Calvert University of Kentucky Michael J. Donahoo Baylor University AMSTERDAM • BOSTON • HEIDELBERG • LONDON NEW YORK • OXFORD • PARIS • SAN DIEGO SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Morgan Kaufmann Publishers is an imprint of Elsevier
Joanne Tracy Publishing Director Publisher Denise E. M. Penrose Acquisitions Editor Rick Adams Publishing Services Manager George Morrison Senior Production Editor Dawnmarie Simpson Assistant Editor Michele Cronin Production Assistant Lianne Hong Cover Design Alisa Andreola Cover Images Composition diacriTech Technical Illustration diacriTech Copyeditor Proofreader Indexer Interior printer Cover printer Phoenix Color, Inc JC Publishing Janet Cocker Sheridan Books, Inc istock Joan Green Morgan Kaufmann Publishers is an imprint of Elsevier. 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA This book is printed on acid-free paper. © 2008 by Elsevier Inc. All rights reserved. Reproduced with permission from TCP/IP. Designations used by companies to distinguish their products are often claimed as trademarks or registered trademarks. In all instances in which Morgan Kaufmann Publishers is aware of a claim, the product names appear in initial capital or all capital letters. Readers, however, should contact the appropriate companies for more complete information regarding trademarks and registration. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means—electronic, mechanical, photocopying, scanning, or otherwise—without prior written permission of the publisher. Permissions may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, E-mail: permissions@elsevier.com. You may also complete your request online via the Elsevier homepage (http://elsevier.com), by selecting “Support & Contact” then “Copyright and Permission” and then “Obtaining Permissions.” Library of Congress Cataloging-in-Publication Data Calvert, Kenneth L. TCP/IP sockets in Java : practical guide for programmers / Kenneth L. Calvert, Michael J. Donahoo. – 2nd ed. p. cm. Includes bibliographical references and index. ISBN 978-0-12-374255-1 (pbk. : alk. paper) 1. Internet programming. 2. TCP/IP (Computer network protocol) 3. Java (Computer program language) I. Donahoo, Michael J. II. Title. QA76.625.C35 2008 005.13 3–dc22 ISBN: 978-0-12-374255-1 For information on all Morgan Kaufmann publications, visit our Web site at www.mkp.com or www.books.elsevier.com Printed in the United States 08 09 10 11 12 5 4 3 2 1 2007039444
To Tricia and Lisa
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Contents 1 2 Preface xi Introduction 1 1.1 Networks, Packets, and Protocols 1 1.2 About Addresses 4 1.3 About Names 6 1.4 Clients and Servers 6 1.5 What Is a Socket? 7 1.6 Exercises 8 Basic Sockets 9 2.1 2.2 TCP Sockets 15 Socket Addresses 9 2.2.1 TCP Client 16 2.2.2 TCP Server 21 2.2.3 Input and Output Streams 25 2.3 UDP Sockets 26 2.3.1 DatagramPacket 27 2.3.2 UDP Client 29 2.3.3 UDP Server 34 2.3.4 Sending and Receiving with UDP Sockets 36 Exercises 38 2.4 3 Sending and Receiving Data 39 3.1 Encoding Information 40 3.1.1 Primitive Integers 40 vii
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