socket programming in c language pdf

... 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 ... s t r u c t sockaddr_in) When connect () returns successfully, the socket is connected and c o m m u n i c a t i o n can proceed with calls to send() and recv() int send(int socket, c o n s t

Ngày tải lên: 05/11/2012, 14:45

... -// circle.cpp // Defines and calls the function circle() // -#include <iostream> #include <iomanip> #include <string> using namespace std; // Prototype of circle(): void circle( ... value occurs, i.e., the function manipulates a local copy Thus, only a local copy of the string is changed in the function, but the string in the calling function remains unchanged Exercise 2 ... used to indicate an error For pointers, the symbolic constant NULL is defined as 0 in standard header files A pointer containing the value NULL is also called NULL pointer Trang 5䊐 Using Pointers

Ngày tải lên: 06/07/2014, 17:21

... public: // Public data members and methods here }; // account.h // Defining the class Account // -#ifndef _ACCOUNT_ // Avoid multiple inclusions #define _ACCOUNT_ #include <iostream> #include ... #include <string> using namespace std; class Account { string name; // Account holder unsigned long nr; // Account number double balance; // Account balance bool init( const string&, unsigned ... so-called public interface of the class. The opposite page shows a schematic definition of a class The privatesection gen-erally contains data members and the publicsection contains the access

Ngày tải lên: 06/07/2014, 17:21

... for initial- izing objects—more details are given later. 252 ■ CHAPTER 13 DEFINING CLASSES // account_t.cpp // Uses objects of class Account. // #include "Account.h" int main() { Account ... defining the methods for the class Account in a source file named Account.cpp, for example. The source code of the application program, for example, the code containing the function main, is independent ... of current2 to the corresponding members of current1. 254 ■ CHAPTER 13 DEFINING CLASSES // ptrObj.cpp // Uses pointers to objects of class Account. // #include "Account.h" // Includes

Ngày tải lên: 06/07/2014, 17:21

... the methods in this “friendly” class automatically become friendfunctions in the class containing the frienddeclaration This technique is useful if a class is used in such close conjunction with ... declaration, which eliminates data encapsulation in certain cases. Imagine you need to write a global function that accesses the elements of a numerical array class If you need to call the access ... FRIEND CLASSES Class Result Class ControlPoint Trang 7䊐 Declaring Friend ClassesIn addition to declaring individual friendfunctions, you can also make entire classes “friends” of another class

Ngày tải lên: 06/07/2014, 17:21

... The C class inherits the Bclass, which is defined in the public section following the colon The privateandpublicsections contain additional members of the Cclass 䊐 Access to Public Members in ... available in the derived class and will retain its original meaning We will be looking at this point in more detail later 䊐 Public Interface Since the Carclass is a publicbase class of the PassCarclass, ... Direct and Indirect Base Classes The derived class Ccan itself be a base class for a further class, D This allows for class hierarchies Class Bthen becomes an indirect base class for class D In

Ngày tải lên: 06/07/2014, 17:21

... = 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; ... 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, ... 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

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; ... of conductors underneath the screen surface detects the change in capacitance caused by the presence of a finger on the surface. The touch screen hardware then works out where on the screen ... comparable between processors. The processor in the Windows PC might take five clock ticks to do something that the Windows Phone processor needs ten ticks to perform. The Windows PC processor might

Ngày tải lên: 17/03/2014, 13:20

... bind() system call:#include <sys/types.h> #include <sys/socket.h> int bind(int sockfd, struct sockaddr *my_addr, int addrlen); sockfd is the socket file descriptor returned by socket() ... 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, ... error checking properly Actually, there’s a cleaner interface you can use instead of inet_addr(): it’s called inet_aton() (“aton” means “ascii to network”): #include <sys/socket.h> #include

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

... medicine once they feel anattack coming on Some medicines are just for asthmaattacks and make a difference right away These medicines help the muscles in the airway relax and arecalled bronchodilators ... medicine, called anti-inflammatory medicine,reduces the swelling in the airways caused by asthma.These medicines must be taken every day even if thereare no symptoms of asthma The medicines act ... to stay in bed for a severe illness Side effect An unwanted reaction to a medicine Some medicine can cause side effects like beingtired Sign Something that others (especially doctors) can see

Ngày tải lên: 23/03/2014, 23:20

... in the much newer language Haskell: calcLine :: Int - > Int - > Int - > Int - > String calcLine ch col line maxp = let tch = if maxp - line == col then [chr ch] else “.” in if col ... (if (= col maxp) tch (append (append tch (calcLine ch (+ col 1) line maxp)) tch)) ) ) (defun calcLines (line maxp) (let* ((ch (+ line (char-int #\A))) (l (append (calcLine ch 0 line maxp) ... an instance fi eld exists once per instance Class methods can access information in class fi elds only, whereas instance methods can access information in the instance fi elds of their own instance

Ngày tải lên: 28/04/2014, 16:01

... follows: public class CSocketPacket { public System.Net.Sockets .Socket thisSocket; public byte[] dataBuffer = new byte[1024]; } and call BeginReceive as follows: CSocketPacket theSocPkt = new CSocketPacket ... 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 ... 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

... Solworth Socket Programming in C/ C++ sockets TCP UDP TCP-based sockets bind listen accept close send/recv shutdown close socket connect send/recv shutdown close server client socket c Mani Radhakrishnan ... Solworth Socket Programming in C/ C++ sockets Socket Programming in C/ C++ c Mani Radhakrishnan and Jon Solworth September 24, 2004 c Mani Radhakrishnan and Jon Solworth Socket Programming in C/ C++ sockets TCP UDP shutdown #i ... following actions  socket: create the socket  connect: connect to a server  send,recv: (repeated)  shutdown  close c Mani Radhakrishnan and Jon Solworth Socket Programming in C/ C++ sockets Contact...

Ngày tải lên: 15/03/2014, 17:20

... left curved bracket indicates the start of a function block, which contains the state- ments defining what the function does. ᮀ Prototype and Definition In a function definition the function ... compiler/linker settings for program com- pilation. DEFINING FUNCTIONS ■ 175 The following section describes how to program global functions. Chapter 13, Defining Classes, describes the steps for defining member ... of inheritance to create specialized classes without needing to change any existing classes. When implementing a class you must define the capacities of those objects, that is, the member functions,...

Ngày tải lên: 06/07/2014, 17:21