Network programming in .NET : with C# and Visual Basic .NET

The purpose of this book is to provide tools to design and implement network-orientated applications in .NET. It is also a guide for software designers to choose the best and most efficient way to implement mission critical solutions. The book addresses real-world issues facing professional developers, such as using third-party components as opposed in-house development. It differentiates itself from existing .NET publications because it is aimed at experienced professionals and concentrates on practical, ready-to-use information. The book is written in two languages C# and VB.NET, and covers never-before published information on Telephony in .NET and packet-level networking. This is the second book in the Digital Press Software Development Series. · Coverage of lower level protocols allows implementation of performance-centric applications · Demonstrates the feasibility of developing telephony solutions in-house rather than outsourcing · Written in VB.NET and C# to assist readers working in either language · Coverage of Email, FTP and the WWW allows implementation of applications in all three areas Network Programming in Dot NET With C Sharp and Visual Basic Dot NET......Page 1 Contents......Page 8 Who should read this book?......Page 16 Part II: Network application design......Page 17 Conventions used in this book......Page 18 Further information......Page 19 Acknowledgments......Page 20 1.1 Introduction......Page 22 1.3 What can a network program do?......Page 23 1.4 IP addresses......Page 24 1.5 The network stack......Page 27 1.7 Internet standards......Page 28 1.8 What is .NET?......Page 30 1.9 Getting started......Page 32 1.10 Using Visual Studio .NET......Page 33 1.11 Using the .NET SDK......Page 37 1.11.1 Compiling with Visual Basic.NET......Page 40 1.12 Conclusion......Page 41 2.2 Streams......Page 42 2.2.1 Streams for files......Page 43 2.2.2 Encoding data......Page 49 2.2.3 Binary and text streams......Page 50 2.2.4 Serialization......Page 54 2.2.5 Writing a database to a stream......Page 65 2.3 Conclusion......Page 75 3.2 What is a socket?......Page 76 3.3 Creating a simple "hello world" application......Page 77 3.3.1 Writing a simple UDP client......Page 78 3.3.2 Writing a simple UDP server......Page 79 3.4.1 Writing a simple TCP/IP client......Page 83 3.4.2 Writing a simple TCP/IP server......Page 86 3.5 Debugging network code......Page 94 3.6 Socket-level networking in .NET......Page 96 3.7 Conclusion......Page 107 4.1 Introduction......Page 108 4.2.1 The HTTP request......Page 109 4.2.2 The HTTP response......Page 112 4.2.4 System.Web......Page 114 4.2.5 Posting data......Page 118 4.2.6 A note on cookies......Page 125 4.2.7 A WYSIWYG editor......Page 126 4.3 Web servers......Page 134 4.3.1 Implementing a Web server......Page 135 4.4 System.Net.HttpWebListener......Page 145 4.5 Mobile Web browsers......Page 149 4.6 Conclusion......Page 151 5.2 Sending an email......Page 152 5.3 SMTP......Page 153 5.3.1 Implementing SMTP......Page 154 5.4 Post office protocol 3......Page 161 5.4.1 Implementing POP3......Page 162 5.5 System.Web.Mail......Page 169 5.5.1 Attachments......Page 172 5.6 Mail application programming interface......Page 174 5.6.1 Accessing the address book......Page 177 5.6.2 IMAP......Page 179 5.6.3 Network news transfer protocol......Page 180 5.7 Conclusion......Page 182 6.2 Microsoft file sharing......Page 184 6.3 Netware file sharing......Page 185 6.4 An overview of FTP......Page 186 6.4.1 How FTP uses ports......Page 188 6.4.2 The FTP handshake......Page 189 6.4.3 Navigating folders......Page 191 6.4.4 FTP command reference......Page 192 6.4.5 Implementing FTP......Page 193 6.4.6 Implementing FTP with the Internet Transfer Control......Page 195 6.4.7 A more substantial implementation of FTP......Page 199 6.4.8 FTP support in .NET 2.0......Page 214 6.5 Conclusion......Page 215 7.1.1 Building a network from scratch......Page 216 7.2.1 Routers......Page 220 7.2.2 Firewalls......Page 221 7.3 Tunneling out of an enterprise network......Page 224 7.4 Avoiding the networking pitfalls......Page 226 7.4.1 Firewall tunneling......Page 227 7.5 Conclusion......Page 228 8.2 Cryptanalysis......Page 230 8.4 Asymmetric encryption......Page 233 8.5 Using RSA as asymmetric encryption......Page 234 8.6.1 Using 3DES as symmetric encryption......Page 239 8.7 Piracy protection......Page 245 8.8 Conclusion......Page 246 9.2 Authentication techniques......Page 248 9.2.1 IIS authentication......Page 249 9.3 Microsoft .NET Passport authentication......Page 251 9.4 Hashing information......Page 253 9.4.2 Using SHA......Page 255 9.6 Certificates......Page 257 9.7 Server certificates......Page 259 9.8 Client certificates......Page 260 9.8.1 Microsoft Certificate Services......Page 261 9.8.2 Reading certificates......Page 262 9.9 Permissions in .NET......Page 265 9.10 Financial network security......Page 267 9.10.2 ISO 8730......Page 268 9.10.4 Corporate transactions......Page 269 9.11 Conclusion......Page 270 10.2 Case study: The Google search engine......Page 272 10.3 Replication and redundancy......Page 274 10.4 Scalable network applications......Page 275 10.5 Future proofing......Page 276 10.6 Thread pooling......Page 277 10.6.1 Implementing a thread pool......Page 279 10.7 Avoiding deadlocks......Page 282 10.8 Load balancing......Page 283 10.9 Conclusion......Page 293 11.2 Tricks and tips to increase performance......Page 296 11.2.1 Caching......Page 297 11.2.2 Keep-alive connections......Page 298 11.2.4 Tweaking settings......Page 299 11.3.1 Multicast basics......Page 303 11.3.2 Multicast routing......Page 304 11.3.3 Implementing multicast......Page 305 11.4 Data compression......Page 310 11.5 Lossless compression......Page 311 11.5.1 Implementing ZIP compression......Page 312 11.6.1 Audio compression......Page 317 11.6.2 Image compression......Page 319 11.6.3 Video compression......Page 323 11.7 Conclusion......Page 324 12.2 DNS......Page 326 12.2.1 Implementing DNS MX......Page 327 12.3 Ping......Page 335 12.4 WHOIS......Page 342 12.4.1 Telnet......Page 347 12.5.2 RIP......Page 348 12.5.6 PPP......Page 349 12.6 WMI......Page 350 12.6.1 Reading WMI data......Page 351 12.6.2 Leveraging WMI......Page 354 12.7 Conclusion......Page 357 13.1 Introduction......Page 358 13.2 IP-level network tapping......Page 360 13.2.1 Interpreting raw network data......Page 365 13.2.2 IP packets in detail......Page 367 13.2.3 ICMP packets in detail......Page 369 13.2.4 TCP/IP packets in detail......Page 370 13.2.5 UDP packets in detail......Page 372 13.2.6 DNS packets in detail......Page 373 13.3.1 Using rvPacket and WinPCap......Page 375 13.3.2 Using PacketX and WinPCap......Page 381 13.4 Physical network tapping......Page 387 13.5 Conclusion......Page 397 14.1 Introduction......Page 400 14.2 Basic telephony......Page 401 14.3 Listening for incoming phone calls......Page 403 14.4 DTMF tones......Page 420 14.5 Audio playback......Page 422 14.5.1 Audio playback over TAPI......Page 434 14.6 Conclusion......Page 438 15.1 Introduction......Page 440 15.3 Implementing a message queue......Page 441 15.3.1 Queuing complex objects......Page 448 15.3.2 Transactions......Page 456 15.3.3 Acknowledgments......Page 458 15.4 Timeouts......Page 460 15.5 Journal......Page 462 15.6 Queued Components......Page 464 15.7 Security......Page 468 15.8 Scalability......Page 470 15.9 Performance issues......Page 472 15.10 Conclusion......Page 473 16.2 What is IPv6?......Page 474 16.3 The history of IPv6......Page 475 16.4 So what changes?......Page 476 16.5 IPv6 naming conventions......Page 477 16.6.1 Auto configuration......Page 478 16.7.1 IPv6......Page 479 16.7.3 Ping6......Page 480 16.7.4 Tracert6......Page 481 16.7.5 IPSec6......Page 482 16.7.6 Windows 2000 specific......Page 484 16.8 IPv6 routing......Page 485 16.8.1 Route determination process......Page 486 16.8.2 Administering the IPv6 routing table......Page 487 16.8.3 IPv6 routing advertisements......Page 489 16.9.1 The 6to4 protocol......Page 490 16.9.2 The ISATAP protocol......Page 492 16.10 IPv6 in .NET......Page 494 16.11 Conclusion......Page 500 17.2 Creating a Web service......Page 502 17.2.1 Deploying a Web service......Page 506 17.3 Using a Web service......Page 507 17.4 Asynchronous calls to Web services......Page 510 17.4.1 Wait handles......Page 511 17.4.2 Callbacks......Page 512 17.5 Interoperability......Page 514 17.6 Performance......Page 515 17.7 Security......Page 516 17.8 Web services enhancements......Page 518 17.8.1 Web service extensions: Attachments......Page 519 17.9 .NET remoting......Page 521 17.9.1 How remoting works......Page 522 17.9.2 Implementing remoting......Page 523 17.9.3 Asynchronous use of remote objects......Page 527 17.9.4 Deployment of a remoting service......Page 529 17.9.5 Configuration......Page 530 17.9.6 Hosting remote objects within IIS......Page 531 17.9.7 Hosting remote objects within a Windows service......Page 532 17.9.8 Distributed garbage collection......Page 536 17.10 Conclusion......Page 539 Index......Page 540 The purpose of this book is to provide tools to design and implement network-orientated applications in .NET. It is also a guide for software designers to choose the best and most efficient way to implement mission critical solutions. The book addresses real-world issues facing professional developers, such as using third-party components as opposed in-house development. It differentiates itself from existing .NET publications because it is aimed at experienced professionals and concentrates on practical, ready-to-use information. The book is written in two languages Cơ and VB.NET, and covers never-before published information on Telephony in .NET and packet-level networking. This is the second book in the Digital Press Software Development Series. Coverage of lower level protocols allows implementation of performance-centric applications Demonstrates the feasibility of developing telephony solutions in-house rather than outsourcing Written in VB.NET and Cơ to assist readers working in either language Coverage of Email, FTP and the WWW allows implementation of applications in all three areas "Network Programming in .NET, is a complete introduction to developing network programs in both C♯ and VB.NET. It includes chapters on the fundamentals of network programming, TCP and UDP sockets, multicasting, HTTP and SMTP, Remoting, and web services. Not only that, but it also covers rare, and hard-to-find practical information on Telephony, Packet level networking, MSMQ, and IPv6. Whether you're a professional network programmer, or just want to see what's possible, you'll find that Network Programming in .NET is a complete guide to the capabilities of networking in the .NET framework."--Jacket This book is awsome, I spent money on hireing people to make simple network aps for me that far exceeded the 35ish dollars spend on this book. I have yet to come across a book that "teaches" to the new commer. So far ive understood every thing the author has wrote. Im a complete new comer never touched the networking stuff(at least not got anything to work) and ive already created a couple usefull things. Alot of people are upset the source code was not included but personally I dont mind retyping it yourself helps you learn. Again if I could I would rate more stars kudos to the author.