SDL2Server.cpp

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <iostream>
#include <string>
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")
#pragma warning( disable : 4996)
#define TRUE 1
#define FALSE 0
#define PORT 5555
using namespace std;

struct t_PLAYERDATA
{
    int playerID;
    double playerX;
    double playerY;
} PLAYERDATA;

int main(int argc, char *argv[])
{
    int opt = TRUE;
    int master_socket, addrlen, new_socket, client_socket[30], max_clients = 30, activity, i, valread, sd, sdBis;
    int max_sd;
    struct sockaddr_in address;
    WSADATA WSAData;
    WSAStartup(MAKEWORD(2, 0), &WSAData);
    char buffer[1024];
    fd_set readfds;
    const char *message = "Welcome to FoD\n";
    for (i = 0; i < max_clients; i++)
    {
        client_socket[i] = 0;
    }
    if ((master_socket = socket(AF_INET, SOCK_STREAM, 0)) == 0)
    {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }
    /*int Socketerror = WSAGetLastError();
    cout << Socketerror << endl;*/
    if (setsockopt(master_socket, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, sizeof(opt)) < 0)
    {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);
    if (bind(master_socket, (struct sockaddr *)&address, sizeof(address)) < 0)
    {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    printf("Listener on port %d \n", PORT);
    if (listen(master_socket, 3) < 0)
    {
        perror("listen");
        exit(EXIT_FAILURE);
    }
    addrlen = sizeof(address);
    puts("Waiting for connections ...");

    while (TRUE)
    {
        FD_ZERO(&readfds);
        FD_SET(master_socket, &readfds);
        max_sd = master_socket;
        for (i = 0; i < max_clients; i++)
        {
            sd = client_socket[i];
            if (sd > 0)
            {
                FD_SET(sd, &readfds);
            }
            if (sd > max_sd)
            {
                max_sd = sd;
            }
        }
        activity = select(max_sd + 1, &readfds, NULL, NULL, NULL);
        if ((activity < 0) && (errno != EINTR))
        {
            printf("select error");
        }
        if (FD_ISSET(master_socket, &readfds))
        {
            if ((new_socket = accept(master_socket, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0)
            {
                perror("accept");
                exit(EXIT_FAILURE);
            }
            printf("New connection , socket fd is %d , ip is : %s , port : %d\n", new_socket, inet_ntoa(address.sin_addr), ntohs(address.sin_port));
            if (send(new_socket, message, strlen(message), 0) != strlen(message))
            {
                perror("send");
            }
            puts("Welcome message sent successfully");
            for (i = 0; i < max_clients; i++)
            {
                if (client_socket[i] == 0)
                {
                    client_socket[i] = new_socket;
                    printf("Adding to list of sockets as %d\n", i);

                    break;
                }
            }
        }
        for (i = 0; i < max_clients; i++)
        {
            memset(buffer, 0, sizeof buffer);
            sd = client_socket[i];
            if (FD_ISSET(sd, &readfds))
            {
                if ((valread = recv(sd, reinterpret_cast<char*>(&PLAYERDATA), sizeof(PLAYERDATA), 0)) < 0)
                {
                    getpeername(sd, (struct sockaddr*)&address, (socklen_t*)&addrlen);
                    printf("Host disconnected , ip %s , port %d \n", inet_ntoa(address.sin_addr), ntohs(address.sin_port));
                    closesocket(sd);
                    client_socket[i] = 0;
                }
                else
                {
                    cout << "playerID : " << PLAYERDATA.playerID << endl;
                    cout << "playerX : " << PLAYERDATA.playerX << endl;
                    cout << "playerY : " << PLAYERDATA.playerY << endl;
                    cout << endl;
                    for (i = 0; i < max_clients; i++)
                    {
                        send(client_socket[i], buffer, strlen(buffer), 0);
                    }
                }
            }
        }
    }
}