socket programming in c for dummies

... the new sockets The server gets a socket for an incoming client connection by calling accept () int accept(int socket, struct sockaddr *clientAddress, unsigned int *addressLength) accept() dequeues ... new socket using send() and r ecv ( ) 9 Close the client connection using c l o s e ( ) Creating the socket, sending, receiving, and closing are the same as in the client The differences in ... outstanding connection requests */ int main(int argc, char *argv[]) { /* Error handling function */ /* TCP client handling function */ int servSock; /* Socket descriptor for server */ int clntSock;

Ngày tải lên: 05/11/2012, 14:45

... 1Socket Programming in C/C++cSeptember 24, 2004 Trang 3Sockets are a protocol independent method of creating a connection between processes Sockets can be either I connection based or connectionless: ... connection is completed, thesocket is closed, and next connection can beaccepted Forking server: After an accept, a child process is forked off to handle the connection Variation: the child processesare ... build a concurrent server: I a fork is performed after the accept I The child process closes listenFd, and communicates usingconnectFd I The parent process closses connectFd, and then loops back tothe

Ngày tải lên: 15/03/2014, 17:20

... = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); Trang 24Accepting Connections#include <sys/types.h> #include <sys/socket.h> int connfd; struct sockaddr_in cliaddr; ... Error has occurred Trang 28Reading and Writing DataTrang 29Closing a Socket#include <unistd.h> close(fd); Close and destroy a socket Close the file descriptor for each connection, then ... maximum number of connections the socket will queue up, each waiting to be accept()’ed Trang 14Connecting to a Server#include <sys/types.h> #include <sys/socket.h> if (connect(fd, addr,

Ngày tải lên: 05/09/2013, 09:57

... contain much code: using using using using using using using using using using using using System; System.Collections.Generic; System.Linq; System.Net; System .Windows; System .Windows. Controls; ... touch screen works in a different way. An array of conductors underneath the screen surface detects the change in capacitance caused by the presence of a finger on the surface. The touch screen ... measure in a computer is the clock speed. A CPU has a clock that ticks when it is running. At each clock tick the processor will do one part of an operation, perhaps fetch an instruction from

Ngày tải lên: 17/03/2014, 13:20

... address information struct sockaddr_in their_addr; // connector’s address information int sin_size; sockfd = socket(AF_INET, SOCK_STREAM, 0); // do some error checking! my_addr.sin_family = AF_INET; ... #include <fcntl.h> . sockfd = socket(AF_INET, SOCK_STREAM, 0); fcntl(sockfd, F_SETFL, O_NONBLOCK); . By setting a socket to non-blocking, you can effectively “poll” the socket for information ... of a connected streamsocket The synopsis: #include <sys/socket.h> int getpeername(int sockfd, struct sockaddr *addr, int *addrlen); sockfd is the descriptor of the connected stream socket,

Ngày tải lên: 19/03/2014, 13:41

... using DNS 144 Networks and Ports 145 Connections and Datagrams 146 7.2 Creating a User Datagram Protocol (UDP) Connection 146 The Socket class 147 Sockets and the SocketAsyncEventArgs class ... Server 156 7.3 Creating a Transmission Control Protocol (TCP) Connection 157 Reading a Web Page 157 7.4 Connecting to a Data Source 163 Using the WebClient class 163 7.5 Using LINQ to Read from ... Application Switching 210 The Windows Phone Application LifeCycle 211 Fast Application Switching in an application 213 Fast Application Switching and Development 218 Fast Application Switching and

Ngày tải lên: 23/03/2014, 22:21

... Worldwide, Inc An International Data Group Company Foster City, CA # Chicago, IL # Indianapolis, IN # New York, NY Trang 2Table of Contents WtrOAUCCION cacccccccccsscccccccccccccccsccccccccececececeee ... Organized .cccccccscccccccescssssessssessvesssecsvsscsessesscess 2 Conventions Used in This Book .ccccccccccssssssssssssseseesetssessessesseeses 3 The lcon CTÊW ch nh HH H121 ee 3 Part |: Getting ... Uisual C++ 5 Customizing the Developer’s Workshop .0 ccecccssssesesessssecsteeesees 6 Customizing Toolbar§ á cá on ng HH HH nga nne 7 Adding tools to a toolbar c.ccccccccccccsccsessesscssecsessssesecessessesseese

Ngày tải lên: 25/03/2014, 16:07

... ❘ CHAPTER 1 A LOOK AT FUNCTIONAL PROGRAMMING HISTORY else tch ++ (calcLine ch (col+1) line maxp) ++ tch calcLines :: Int -> Int -> String calcLines line maxp = let ch = (ord ‘A’) + line in ... www.it-ebooks.info PROFESSIONAL Functional Programming in C# CLASSIC PROGRAMMING TECHNIQUES FOR MODERN PROJECTS Oliver Sturm www.it-ebooks.info Professional Functional Programming in C#: Classic Programming ... maxp line)) (cons ch nil) (cons 46 nil)))) (if (= col maxp) tch (append (append tch (calcLine ch (+ col 1) line maxp)) tch)) ) ) (defun calcLines (line maxp) (let* ((ch (+ line (char-int #\A)))

Ngày tải lên: 28/04/2014, 16:01

... as well as business continuity My goal here is to provide communica-a reference thcommunica-at communica-anybody ccommunica-an use to communica-approcommunica-ach, understcommunica-and,address, ... fuel, special paper,and special parts comprise critical resources The risk of nothaving a critical resource as part of a recovery scenario istotally unacceptable Maintaining critical resources is ... disruptive incidents For one thing, maintaining continuity is practically a full-timejob in itself Well, okay, you can’t expect to see a Department of Business Continuity crop up overnight in your company

Ngày tải lên: 01/07/2014, 11:24

... Accessing the PCI slots 80 Attaching the antenna 83 Chapter 6: Getting Your PC On the Net 85 Configuring Windows XP 85 Figuring out if you are connected 86 Checking status 86 Configuring ... 109 Adding an Access Point 116 Converting a router into an access point 117 Chapter 8: Troubleshooting Network Hardware .121 Before You Begin 121 Coming Up with a Plan 121 Defining the ... extenders 42 Creating multiple access points 43 Dealing with Wired Devices 44 Wiring a computer 44 Upgrading a computer 45 Bridging a computer 48 Chapter 3: Setting Up Routers .49 Unpacking the

Ngày tải lên: 02/07/2014, 14:20

... This Chapter ✓ Using satellites for Internet access ✓ Microwaving without food ✓ Maximizing access with WiMax You probably connect to the Internet using DSL or cable modem service, both of which ... broadband access before venturing much farther into this book Speedier broadband access is practically required for connecting to the Internet nowadays, if you don’t want to spend your life in front ... Computer Industry Acronyms 76 Cracking Open That Case! 79 Chapter 6: Getting Your PC On the Net 85 Configuring Windows XP 85 Using Wireless Utilities 93 Configuring Vista 96 Pushing Boundaries

Ngày tải lên: 02/07/2014, 14:20

... plastic holder), you find that PC Cards have a wide connector, almost 2 inches wide, and have protruding pins The ExpressCard’s connector is slightly over an inch wide and has more of a card interface ... connectors coated in pre-cious metals, but for a home network you’d just be throwing your money away Even better, find a friend with cabling experience to do the work for you in exchange for dinner ... already covered by the main access point When shopping for range extenders, also remember that some wireless access points can be configured as a repeater, which is the same thing They both do a fine

Ngày tải lên: 02/07/2014, 14:20

... that second (or third, or fourth) server off. As a case in point, these combination router–access point–switch devices are roughly the same price as an access point, so you might just come ... Deciphering DHCP 63 Understanding DHCP 63 Chapter 5: Installing Your Wireless Adapter In This Chapter ✓ Installing PCI-based network adapters ✓ Installing laptop expansion cards ✓ Installing USB adapters ... wireless inside Windows XP The name implies... meantime shoot for excellent through good Checking status That information from the hover was nice, but you can find more help by clicking your

Ngày tải lên: 02/07/2014, 14:20

... access, which isn’t needed for the installation anyway the initial screen, shown in Figure 7-2. After accepting the license and going through the introductory screens, you are prompted to indicate ... that this machine is configured for very limited sharing You may click on each row to change the setting Trang 3con-Book II Chapter 6the network to the place in the list you want (Windows XP had ... so be careful about typing in credit card numbers and passwords unless the Web site is protected with Secure Sockets Layer or Transport Layer Security (you see a lock in your browser window

Ngày tải lên: 02/07/2014, 14:20

... the loop by plugging your computer directly into your Internet connection. For cable modems, this is fairly straightforward, but for ADSL connections you sometimes need some special software. ... 8-6: The router status screen. The section of the router status screen headed Internet Port contains the information pertaining to your Internet connection. You can see that an IP address ... want to continue. The router displays a progress bar and thinks for a while before reboot- ing and bringing you back to the main menu. Don’t touch your computer while this process is happening.

Ngày tải lên: 02/07/2014, 14:20

... You can select multiple con- nections by holding down the Ctrl key as you click each network. Figure 3-1: Network Connections dialog box. Book III Chapter 3 Creating Bridges 161 Bridging ... bridge: 1. Click Start. The Start menu appears. Book III Chapter 3 Creating Bridges 163 Bridging with Windows Vista 2. Click Network and Sharing Center; click Manage network connections from ... Bridging with Windows Vista Figure 3-6: Deleting a network bridge. Contents Chapter 3: Creating Bridges 159 Bridging with Windows Vista 160 Chapter 4: Configuring Printers In This Chapter

Ngày tải lên: 02/07/2014, 14:20

... anything offering a free trial that requires a shipping charge, and always check the fine print Check your credit card balance online periodi-cally (having a separate credit card for Internet purchases ... or, in the case of make-money-fast type offers, is simply public domain information ✦ The company’s contact information is not made clear in case you want to complain or cancel your subscription ... an unfortunate part of the Internet and security The credit card companies are still rolling out their security standards across their merchants, which will enforce rules protecting your information

Ngày tải lên: 02/07/2014, 14:20

... you’ve enabled port forwarding (see Book IV, Chapter 2). If you want to allow the application to receive connections, then click Unblock. If not, click Keep Blocking. Using automatic updates Software ... surfaced in late 2008 that allowed anyone that could connect to your machine to take it over. Oops. Patches are pieces of software that fix bugs. Think of using patches as patch- ing up a hole in ... shown in Figure 3-6 is light on details. You’re being asked to decide whether or not an application should accept connections. If you allow it, the Windows firewall will allow incoming connections

Ngày tải lên: 02/07/2014, 14:20

... drop-5 Click OK. Trang 3Book V Chapter 36 Click Mobile Device Settings. 7 Click Change content sync settings. 8 Select which content should be synced, as shown in Figure 3-2. Trang 4Running with ActiveSyncYou ... settings are correct on the ActiveSync software running on your desktop PC Now, let’s synchronize: 1 Click Start➪All Programs. 2 Click Microsoft ActiveSync. The ActiveSync dialog box appears 3 Click ... 6 Click File. 7 Click Connection Settings. The Connection Settings dialog box appears 8 Confirm that this choice is selected: Allow Network (Ethernet) and Remote Access Service (RAS) Server Connection

Ngày tải lên: 02/07/2014, 14:20

... connection, the callback routine is called and you can accept the connection by calling EndAccept. The EndAccept returns a socket object which represents the incoming connection. Here is the code ... we can pass a class object that contains as much information as we want. For example we can declare a class as follows: public class CSocketPacket { public System.Net.Sockets .Socket thisSocket; ... m_socListener.Listen (4); // create the call back for any client connections m_socListener.BeginAccept(new AsyncCallback ( OnClientConnect ),null); cmdListen.Enabled = false; } catch(SocketException se) ...

Ngày tải lên: 18/01/2014, 08:20