packetc_programming.pdf

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For your convenience Apress has placed some of the front
matter material after the index. Please use the Bookmarks
and Contents at a Glance links to access them.
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Contents at a Glance
Contents ...................................................................................................................... v
About the Authors.................................................................................................... xvi
Acknowledgments .................................................................................................. xvii
Introduction ............................................................................................................. xix
PART I: packetC Background ...................................................................................... 1
■
CHAPTER 1: Origins of packetC .............................................................................. 3
■
CHAPTER 2: Introduction to the packetC Language................................................ 9
■
CHAPTER 3: Style Guidelines for packetC Program .............................................. 17
■ CHAPTER 4: Construction of a packetC Program.................................................. 39
■
CHAPTER 5: Variables: Identifiers, Basic Scalar Data Types, and Literals ........... 53
PART II: Language Reference.................................................................................... 63
■ CHAPTER 6: Data Initialization and Mathematical Expressions ........................... 65
■
CHAPTER 7: Functions .......................................................................................... 87
■
CHAPTER 8: packetC Data Type Fundamentals .................................................... 93
■
CHAPTER 9: C-Style Data Types.......................................................................... 103
■
CHAPTER 10: Basic Packet Interaction and Operations ..................................... 119
■ CHAPTER 11: Selection Statements .................................................................... 125
■
CHAPTER 12: Loops and Flow Control ................................................................ 129
■
CHAPTER 13: Exception Handling ....................................................................... 133
■
CHAPTER 14: packetC Database Types and Operations...................................... 139
■
CHAPTER 15: packetC Search Set Types and Operations ................................... 151
■ CHAPTER 16: Reference Type and Operation...................................................... 159
■
CHAPTER 17: Semaphores in packetC ................................................................ 171
■
CHAPTER 18: Packet Information Block and System Packet Operations ........... 175
iii
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■ CONTENTS!4!',!.#%
■
CHAPTER 19: Descriptor Type and Operations ................................................... 205
PART III: Developing Applications .......................................................................... 215
■ CHAPTER 20: Control Plane and System Interaction .......................................... 217
■
CHAPTER 21: packetC Pre-Processor ................................................................. 223
■ CHAPTER 22: Pragmas and Other Key Compiler Directives................................ 233
■
CHAPTER 23: Developing Large Applications in packetC .................................. 237
■
CHAPTER 24: Construction of a packetC Executable .......................................... 245
■ CHAPTER 25: packetC Standard Networking Descriptors ................................. 263
■
CHAPTER 26: Developing for Performance ......................................................... 281
■ CHAPTER 27: Standard Libraries ........................................................................ 287
PART IV: Industry Reprints ..................................................................................... 309
■
REPRINT 1: packetC Language for High Performance Packet Processing ......... 311
■
REPRINT 2: A Paradigm for Processing Network Protocols in Parallel.............. 319
■
REPRINT 3: Dynamically Accessing Packet Header Fields at High-speed.......... 329
■ REPRINT 4: packetC Language and Parallel Processing of Masked Databases . 335
■
REPRINT 5: Packet Content Matching with packetC Searchsets........................ 345
■
REPRINT 6: References for Run-time Aggregate Selection with Strong Typing . 355
■ REPRINT 7: Portable Bit Fields in packetC ......................................................... 363
■
REPRINT 8: packet Field and Bitfield Allocation Order ....................................... 371
■ REPRINT 9: Managing Heterogeneous Architectures for High-speed Packet
Processing .............................................................................. 377
■ APPENDIX A: Reference Tables........................................................................... 383
■
APPENDIX B: Open Systems Vendors for packetC .............................................. 395
■ APPENDIX C: Glossary ........................................................................................ 405
INDEX ...................................................................................................................... 419
iv
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Introduction
This book covers a vast array of information related to packetC. It is a complete language reference and
contains background information on many unique parts of packetC. As packetC shares much of its
grammar with C, the book focuses on being an instructional language reference and not a general C
programming introduction, since extensive texts exist on that topic. Focusing the unique aspects of
packetC, this book explores many of the use cases that drove the new language features present in
packetC. Throughout this book, you will find sections that will highlight why deviations were made for
security, parallel-processing, or network rationales. While the book is instructional, chapters are
organized in such a way that they can serve as a reference tool well beyond the initial learning of the
language.
Scope
What this book doesn’t cover:
•
This book is not an introduction to programming or learning basic fundamentals
of C, or even aspects of object orientation. A programmer is expected to have used
C or C++ and be well-versed in general computer science.
•
The concepts behind networking, network protocols, packets, and the way in
which they work is a presumed skill-set of the reader. These are requisite to an
understanding of the aspects of the language discussed in this book.
•
The basic concepts around parallel processing and how multi-core processing
systems have evolved is presumed to be at least casually understood by packetC
developers.
•
This is neither a tutorial on CloudShield systems nor how to use the CloudShield
PacketWorks IDE that integrates the first packetC compiler and debuggers.
•
While some references to workflow in an IDE are made showing step-by-step how
to create, compile, and load, these are confined to limited chapters focusing on
examples aiding the developer with tool-chain aspects important to packetC. No
specific references to a user manual or specific development environment releases
are provided. In this way, we keep this book focused on the language and not a
specific development environment release.
•
C99 defines many specific constraints of the C language. We presume that C99 can
be referenced elsewhere and that the user is generally familiar with this modern
variant of C. packetC Programming will address the deviations and stress unique
points that differ between releases, but it will not focus on teaching it.
xix
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