qotd/client/main.c

#include <arpa/inet.h> // inet_addr()
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h> // bzero()
#include <sys/socket.h>
#include <unistd.h> // read(), write(), close()
#include <errno.h>
#include "config.h"
#define MAX 80
#define PORT 17
#define SA struct sockaddr

int main()
{
    int sockfd, connfd;
    struct sockaddr_in servaddr4, cli;

    unsigned int servaddrlength;
    // 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");

    // assign IP, PORT
    servaddr4.sin_family = AF_INET;
    servaddr4.sin_addr.s_addr = inet_addr("127.0.0.1");
    servaddr4.sin_port = htons(PORT);

    int status = connect(sockfd, (SA *)&servaddr4, sizeof servaddr4);
    // connect the client socket to server socket
    if (status != 0)
    {
        printf("%i\n", errno);
        printf("connection with the server failed...\n");

        exit(0);
    }
    else
        printf("connected to the server..\n");

    struct sockaddr *servaddr = (SA *)&servaddr4;
    unsigned int ss = sizeof servaddr;
    // function for chat
    char clientMessage[MESSAGE_STRING_LENGTH] = {0};
    recvfrom(sockfd, clientMessage, MESSAGE_STRING_LENGTH, 0, servaddr, &ss);
    printf("From Server : %s", clientMessage);

    // close the socket
    close(sockfd);
}