client.c File Reference

Client side implementation of Server-Client system. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
#include <unistd.h>

Include dependency graph for client.c:

Macros
#define	MAX   80
	max. More...
#define	PORT   8080
	port number to connect to
#define	SA   struct sockaddr
	shortname for sockaddr

Functions
void	func (int sockfd)
	Continuous loop to send and receive over the socket. More...
int	main ()
	Driver code. More...

Detailed Description

Client side implementation of Server-Client system.

Author

Nairit11

Krishna Vedala

See also

client_server/server.c

Macro Definition Documentation

MAX

#define MAX   80

max.

characters per message

Function Documentation

func()

void func

(

int

sockfd

)

Continuous loop to send and receive over the socket.

Exits when "exit" is sent from commandline.

Parameters

sockfd

socket handle number

{
    char buff[MAX];
    int n;
    for (;;)
    {
        bzero(buff, sizeof(buff));
        printf("Enter the string : ");
        n = 0;
        while ((buff[n++] = getchar()) != '\n')
        {
            ;
        }
        write(sockfd, buff, sizeof(buff));
        bzero(buff, sizeof(buff));
        read(sockfd, buff, sizeof(buff));
        printf("From Server : %s", buff);
        if ((strncmp(buff, "exit", 4)) == 0)
        {
            printf("Client Exit...\n");
            break;
        }
    }
}

main()

int main

(

void

)

Driver code.

{
#ifdef _WIN32
    // when using winsock2.h, startup required
    WSADATA wsData;
    if (WSAStartup(MAKEWORD(2, 2), &wsData) != 0)
    {
        perror("WSA Startup error: \n");
        return 0;
    }
 
    atexit(cleanup);  // register at-exit function
#endif
 
    int sockfd, connfd;
    struct sockaddr_in servaddr, cli;
 
    // socket create and verification
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1)
    {
        printf("socket creation failed...\n");
        exit(0);
    }
    else
    {
        printf("Socket successfully created..\n");
    }
    bzero(&servaddr, sizeof(servaddr));
 
    // assign IP, PORT
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    servaddr.sin_port = htons(PORT);
 
    // connect the client socket to server socket
    if (connect(sockfd, (SA *)&servaddr, sizeof(servaddr)) != 0)
    {
        printf("connection with the server failed...\n");
        exit(0);
    }
    else
    {
        printf("connected to the server..\n");
    }
 
    // function for chat
    func(sockfd);
 
    // close the socket
    close(sockfd);
    return 0;
}

Here is the call graph for this function: