client_socket_communication.c

#include <arpa/inet.h>
#include <stdio.h>
#include <sys/types.h>  //socket
#include <sys/socket.h> //socket
#include <string.h>     //memset
#include <stdlib.h>     //sizeof
#include <netinet/in.h> //INADDR_ANY

#define PORT 8000
#define SERVER_IP "127.0.0.1"
#define MAXSZ 100
int main()
{
    int sockfd; // to create socket

    struct sockaddr_in serverAddress; // client will connect on this

    int n;
    char msg1[MAXSZ];
    char msg2[MAXSZ];

    // create socket
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    // initialize the socket addresses
    memset(&serverAddress, 0, sizeof(serverAddress));
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_addr.s_addr = inet_addr(SERVER_IP);
    serverAddress.sin_port = htons(PORT);
    //
    //       //client  connect to server on port
    connect(sockfd, (struct sockaddr *)&serverAddress, sizeof(serverAddress));
    // send to sever and receive from server
    while (1)
    {
        printf("\nEnter message to send to server:\n");
        fgets(msg1, MAXSZ, stdin);
        if (msg1[0] == '#')
            break;

        n = strlen(msg1) + 1;
        send(sockfd, msg1, n, 0);

        n = recv(sockfd, msg2, MAXSZ, 0);

        printf("Receive message from  server::%s\n", msg1);
    }

    return 0;
}