Server

#include <stdio.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

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

int main() {
    int sockfd;
    struct sockaddr_in servaddr, cli;
    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 = htonl(INADDR_ANY);
    servaddr.sin_port = htons(PORT);

    if (bind(sockfd, (SA *)&servaddr, sizeof(servaddr)) != 0) {
        printf("Socket bind failed...\n");
        exit(0);
    }
    printf("Socket successfully binded..\n");

    len = sizeof(cli);

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

        // Receive message from client
        recvfrom(sockfd, buff, MAX, 0, (SA *)&cli, &len);
        printf("From Client: %s", buff);

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

        // Send message to client
        bzero(buff, MAX);
        printf("From Server: ");
        fgets(buff, MAX, stdin);
        sendto(sockfd, buff, strlen(buff), 0, (SA *)&cli, len);

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

    close(sockfd);
    return 0;
}