Server.cpp

#include <stdio.h>
#include <stdlib.h>

#include <netdb.h>
#include <unistd.h>
#include <netinet/in.h>

#include <string.h>

#include <sys/socket.h>

#include "Server.h"

Server::Server(double port) {
    this->port = port;
    this->sockfd = 0;
}

void Server::start() {
    int sockfd, newsockfd, portno, clilen;
    char buffer[256];
    struct sockaddr_in serv_addr, cli_addr;
    int n;

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        throw "ERROR opening socket";
    }

    bzero((void *) &serv_addr, sizeof(serv_addr));

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    serv_addr.sin_port = htons(port);

    if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
        throw "ERROR on binding";
    }

    listen(sockfd, 5);

    clilen = sizeof(cli_addr);

    /* Accept actual connection from the client */
    newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, (socklen_t*)&clilen);

    if (newsockfd < 0) {
        perror("ERROR on accept");
        exit(1);
    }

    /* If connection is established then start communicating */
    bzero(buffer, 256);
    n = read(newsockfd, buffer, 255);

    if (n < 0) {
        perror("ERROR reading from socket");
        exit(1);
    }

    printf("Here is the message: %s\n", buffer);

    /* Write a response to the client */
    n = write(newsockfd, "I got your message", 18);

    if (n < 0) {
        perror("ERROR writing to socket");
        exit(1);
    }
}