Client

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

#define MAX 80
#define PORT 8088
#define SA struct sockaddr

int main() {
    int sockfd;
    struct sockaddr_in servaddr;
    char buff[MAX];
    socklen_t len;

    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd == -1) {
        printf("Socket creation failed...\n");
        exit(0);
    }
    printf("Socket successfully created..\n");

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");  // Localhost
    servaddr.sin_port = htons(PORT);
    len = sizeof(servaddr);

    while (1) {
        bzero(buff, MAX);

        // Send message to server
        printf("From Client: ");
        fgets(buff, MAX, stdin);
        sendto(sockfd, buff, strlen(buff), 0, (SA *)&servaddr, len);

        if (strncmp("exit", buff, 4) == 0) {
            printf("Client Exit...\n");
            break;
        }

        // Receive message from server
        bzero(buff, MAX);
        recvfrom(sockfd, buff, MAX, 0, (SA *)&servaddr, &len);
        printf("From Server: %s", buff);

        if (strncmp("exit", buff, 4) == 0) {
            printf("Server requested exit. Client shutting down...\n");
            break;
        }
    }

    close(sockfd);
    return 0;
}