Table Of ContentiOS and OS X Network
Programming
Cookbook
Over 50 recipes to develop network applications in both
the iOS and OS X environment
Jon Hoffman
BIRMINGHAM - MUMBAI
iOS and OS X Network Programming
Cookbook
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First published: January 2014
Production Reference: 1150114
Published by Packt Publishing Ltd.
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ISBN 978-1-84969-808-5
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Cover Image by Jarosław Blaminsky ([email protected])
Credits
Author Project Coordinator
Jon Hoffman Joel Goveya
Reviewers Proofreader
Chady Kassouf Joanna McMahon
Shahin Katebi
Indexer
Josh Rufer
Monica Ajmera Mehta
Acquisition Editor
Graphics
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Abhinash Sahu
Lead Technical Editor
Ritika Dewani
Production Coordinator
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Technical Editors
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Cover Work
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Adonia Jones
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About the Author
Jon Hoffman has close to 20 years of experience in the field of Information Technology.
Over these 20 years, Jon has worked in the areas of system administration, network
administration, network security, development and architecture. Currently, he works as
a software engineer at Syn-Tech Systems. He has started a network development blog at
http://network-development.blogspot.com that will enhance and expand on the
material covered in this book.
Over the past five years, he has developed numerous applications for the iOS platform. These
include several apps that he has published in the App Store, apps that he has written for third
parties, and numerous enterprise applications.
What really drives Jon are the challenges in Information Technology; there is nothing more
exhilarating for him than overcoming a challenge. Some of Jon's other interests are watching
baseball (Go Sox!) and basketball (Go Celtics!). Jon also really enjoys Taekwondo; he and his
eldest daughter Kailey are on pace to get their black belts together in the spring of 2014.
I would like to thank my wonderful wife Kim, without whose support,
encouragement, patience, and understanding, this book would have never
been written. I would also like to thank my two wonderful daughters Kailey
and Kara, who have both been my inspiration and driving force since they
were born. To my dog, Buddy, maybe one day I will be the person who he
thinks I am.
I would like to give special thanks to all of the wonderful people at Packt
Publishing who have helped me along the way.
About the Reviewers
Chady Kassouf is an independent iOS and web development expert. He started
programming 21 years ago and hasn't stopped since.
Five years ago, he decided to leave his job as a team leader in one of the leading digital
agencies, and started his own business.
His interests outside of computers include arts, music, and fitness. He can be found online at
http://chady.net/.
Shahin Katebi is a software architect and developer with 10 years of experience in
creating apps for various platforms (Mac, iOS, Windows, and the Web). He works as a mobile
solutions consultant with different companies, and also works with some startup teams
worldwide. He teaches iOS/Mac OS development, and as a mentor at Startup Weekend
events, helps startup teams make their own business. He is the founder and team leader at
Seeb Co. (http://seeb.co/), a creative mobile app development organization creating
apps for customers around the world.
Josh Rufer attended university and majored in graphic arts. As passionate as he was for
his traditional artwork, he found far more enjoyment in the art of human interaction. His first
position was as the junior interface designer for a small XP programming group. Without enough
work to keep him busy, he quickly outpaced his job title and was promoted to senior user
experience engineer. On enhancing his programming skills in Java and C++, he was promoted to
the position of junior programmer and again promoted as a senior software engineer.
Always looking for more challenges, he formed a one-man design and software engineering
firm called Guy Writes Code. This allowed him to focus his free time on the things that most
interested him: designing and development for the iPhone and iPad. He has created several
public applications for companies such as Metabahn and Camdilleo Media. He is currently
working on iPad-based training and simulation applications, including augmented reality
training on the iPad.
When possible, Josh has helped with fact checking and technical editing for books such as
Deploying with JRuby by Joe Kutner.
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Table of Contents
Preface 1
Chapter 1: BSD Socket Library 7
Introduction 7
Finding the byte order of your device 10
Retrieving network address information 12
Performing a network address resolution 16
Creating an echo server 22
Creating an echo client 31
Creating a data server 38
Creating a data client 42
Chapter 2: Apple Low-level Networking 45
Introduction 45
Retrieving network address information 46
Performing a network address resolution 48
Creating an echo server 55
Creating an echo client 63
Creating a server to receive data 68
Creating a client to send data 76
Checking the network status 78
Chapter 3: Using Libnet 83
Introduction 83
Installing libnet 89
Adding libnet to your project 91
Resolving names to addresses with libnet 93
Retrieving local addresses with libnet 97
Constructing a Ping packet with libnet 100
