Table Of Content

Cover Page: 1 Title Page Page: 2 Copyright Page: 3 Contents Page: 4 Introduction Page: 5 1. Networking Basics Page: 7 Quick Start: The Elements of a Network Page: 7 Components Page: 7 Modular Design Page: 7 The Network Protocol Stack Page: 8 Clients and Servers Page: 10 Requirements for Internet Communications Page: 10 A Word about Web Servers Page: 10 In Depth: Inside Ethernet Page: 10 Advantages Page: 11 Limits Page: 11 Using a PC for Network Communications Page: 12 The IEEE 802.3 Standard Page: 12 Frames Page: 13 Media Access Control: Deciding When to Transmit Page: 14 Physical Addresses Page: 16 Using a Protocol Analyzer to View Ethernet Traffic Page: 17 2. Building a Network: Hardware Options Page: 18 Quick Start: Connecting to a PC 36 Page: 18 Components and Configurations Page: 18 Other Options Page: 19 In Depth: Cables, Connections and Network Speed Page: 19 Cable Types for Different Uses Page: 19 Twisted Pair Cable Page: 20 Fiber Optic Cable Page: 22 Coaxial Cable Page: 24 Connections for Harsh Environments Page: 24 Supplying Power Page: 25 Going Wireless Page: 25 Media Systems Page: 25 Interfacing to Ethernet Controllers Page: 28 Using Repeater Hubs, Ethernet Switches, and Routers Page: 28 3. Design Choices Page: 32 Quick Start: Selecting Components Page: 32 Complete Solutions Page: 32 Special-Purpose Modules Page: 37 In Depth: Ethernet Controllers Page: 39 What the Hardware Does Page: 39 Ethernet Controller Basics Page: 39 The ASIX AX88796 Page: 40 Realtek RTL8019AS Page: 42 SMSC LAN91C96 Page: 42 Cirrus Logic CS8900A Page: 43 4. Using the Internet Protocol in Local and Internet Communications Page: 44 Quick Start: Connecting to the Internet Page: 44 Considerations in Obtaining Internet Service Page: 44 Technologies for Connecting Page: 45 Static and Dynamic IP Addresses Page: 46 Connecting Multiple Computers to the Internet Page: 46 Communicating through a Firewall Page: 47 Obtaining and Using a Domain Name Page: 47 In Depth: Inside the Internet Protocol Page: 49 What IP Does Page: 50 Ip Addresses Page: 50 The IP Header Page: 53 Assigning an IP Address to a Host Page: 54 Matching an IP Address to an Ethernet Interface Page: 55 How a Datagram Finds Its Way to Its Destination Page: 56 The Internet Control Message Protocol (Icmp) Page: 57 5. Exchanging Messages Using UDP and TCP Page: 58 Quick Start: Basic Communications Page: 58 Configuring a Device for Network Communications Page: 58 Sending UDP Datagrams Page: 60 Receiving UDP Datagrams Page: 62 Exchanging Messages Using TCP Page: 63 UDP and TCP From PC Applications Page: 65 In Depth: Inside UDP and TCP Page: 66 About Sockets and Ports Page: 66 UDP: Just the Basics Page: 67 TCP: Adding Handshaking and Flow Control Page: 68 6. Serving Web Pages with Dynamic Data Page: 73 Quick Start: Two Approaches Page: 73 Serving a Page with Dynamic Data Page: 73 Rabbit Realtime Web Page Page: 74 TINI Realtime Web Page Page: 75 In Depth: Protocols for Serving Web Pages Page: 77 Using the Hypertext Transfer Protocol Page: 77 HTTP Versions Page: 78 Elements of an HTTP Message Page: 78 Inside the Hypertext Markup Language Page: 80 Server Side Include Directives Page: 81 7. Serving Web Pages That Respond to User Input Page: 83 Quick Start: Device Controller Page: 83 The Device Controller’s Web Page Page: 83 Rabbit Device Controller Page: 83 TINI Device Controller Page: 85 In Depth: Using Cgi and Servlets Page: 88 Cgi for Embedded Systems Page: 88 Servlets for Embedded Systems Page: 89 Receiving Form Data Page: 90 8. E-Mail for Embedded Systems 339 Page: 95 Quick Start: Sending and Receiving Messages Page: 95 Sending an E-Mail From a Rabbit Page: 95 Sending an E-Mail From a TINI Page: 96 Receiving E-Mail on a Rabbit Page: 97 Receiving E-Mail on a TINI Page: 97 In Depth: E-Mail Protocols Page: 98 How E-Mail Works Page: 98 Using the Simple Mail Transfer Protocol Page: 99 Sending E-Mail with a Url Page: 102 Using the Post Office Protocol Page: 102 9. Using the File Transfer Protocol Page: 105 Quick Start: FTP Clients and Servers Page: 105 Rabbit FTP Client Page: 105 TINI FTP Client Page: 106 Rabbit FTP Server Page: 108 TINI FTP Server Page: 109 In Depth: Inside the File Transfer Protocol Page: 109 Requirements Page: 110 Transferring a File Page: 110 Commands Page: 111 Requesting a File with a Url Page: 113 10. Keeping Your Devices and Network Secure Page: 114 Quick Start: Limiting Access with Passwords Page: 114 Using Basic Authentication Page: 114 Basic Authentication on the Rabbit Page: 115 Basic Authentication on the TINI Page: 115 In Depth: Four Rules for Securing Your Devices and Local Network Page: 116 Use a Firewall Page: 116 Restrict Access with User Names and Passwords Page: 117 Validate User Data Page: 118 Encrypt Private Data Page: 118 Index Page: 120

Description:

Bringing together two areas of computer technologynetworking and embedded systemsthis developer's guide offers guidance and examples for each of these, with a focus on the special requirements and limits of embedded systems. Because developing an embedded system for networking requires knowledge from many areas, including circuit design, programming, network architecture, and Ethernet and Internet protocols, developers are given valuable technical information on each that can be put to use right away. Covered are the advantages and limits of using Ethernet to connect embedded systems in a local network, hardware and program code needed to connect an embedded system to an Ethernet network and the Internet, and how to build a network. Also discussed are how embedded systems can use TCP/IP and related protocols and how personal-computer applications can use the protocols to communicate with embedded systems. Developers will learn how their Web server's pages can include dynamic, real-time content and respond to user input.