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#include <iostream>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "utils.hpp"
#define LOCALHOST (char*) "127.0.0.1"
#define PUBLIC (char*) "0.0.0.0"
#define IP PUBLIC
#define PORT (char*) "4444"
int main(int argc, char** argv);
int game_server(int* max_players, std::vector<Player*>* players, const char* ip, const char* port, int* sockfd);
void* server_handler(void* psockaddr);
void* client_handler(void* client_fd);
int waiting_loop(std::vector<Player*>* players, int fps, bool* visual);
int notify_players( std::vector<Player*>* players, Player* sender_player, Packet* packet);
int manual_disconnect(Player* player, std::vector<Player*>* players);
std::vector<Player*> players;
int max_players;
const int server = 1;
int client_id = 0;
bool visual = false;
int fps = 10;
int sockfd;
std::mutex mutex;
int main(int argc, char** argv)
{
max_players = -1;
char* port = PORT;
if(argv[1])
max_players = atoi(argv[1]);
if(argv[2])
port = argv[2];
if(argv[3])
if(!strcmp(argv[3], "-visual"))
visual = true;
std::cout << "Starting server with access for " << max_players << " players. (" << IP << ":" << port << ")" << std::endl;
int result = game_server(&max_players, &players, IP, port, &sockfd);
if(result)
std::cout << "[!] Server failed to start! [" << IP << ":" << port << "] (" << result << ")" << std::endl;
else
waiting_loop(&players, fps, &visual);
return 0;
}
int game_server(int* max_players, std::vector<Player*>* players, const char* ip, const char* port, int* sockfd)
{
*sockfd = socket(AF_INET, SOCK_STREAM , 0);
if(*sockfd < 0)
return 1;
sockaddr_in sockaddr;
sockaddr.sin_family = AF_INET;
sockaddr.sin_addr.s_addr = inet_addr(ip);
sockaddr.sin_port = htons(atoi(port));
if(bind(*sockfd, (struct sockaddr*)&sockaddr, sizeof(sockaddr)))
return 2;
if (listen(*sockfd, 1))
return 3;
if(visual)
{
pthread_t server_thread;
if(pthread_create(&server_thread, NULL, server_handler, (void*)&sockaddr))
return 5;
}
else
server_handler((void*)&sockaddr);
return 0;
}
void* server_handler(void* psockaddr)
{
sockaddr_in* sockaddr = (sockaddr_in*)psockaddr;
socklen_t addrlen = sizeof(*sockaddr);
int connection;
while((connection = accept(sockfd, (struct sockaddr*)sockaddr, &addrlen)))
{
if (connection < 0)
return 0;
if((int)(&players)->size() == *(&max_players))
{
std::cout << "[-] Player limit has been reached. Incoming player has been kicked" << std::endl;
fflush(stdout);
close(connection);
continue;
}
pthread_t sniffer_thread;
if(pthread_create(&sniffer_thread, NULL, client_handler, (void*)(intptr_t)connection))
return 0;
}
return 0;
}
void* client_handler(void* pclient_fd)
{
struct sockaddr_in client;
socklen_t addrlen = sizeof(client);
getpeername((intptr_t)pclient_fd, (struct sockaddr*)&client, &addrlen);
Player player {};
player.fd = (intptr_t)pclient_fd;
strncpy(player.ip, inet_ntoa(client.sin_addr), sizeof(player.ip));
Packet incoming_packet {};
int read_size = 0;
while((read_size = recv(player.fd, &incoming_packet, sizeof(incoming_packet), 0) > 0))
{
int result = handle_incoming_packet(&player, &incoming_packet, &players);
if(result > 0)
{
if(strlen(player.name))
std::cout << "[!] Invalid packet from player! [" << player.name << "] (" << player.ip << ")" << std::endl;
else
std::cout << "[!] Someone tried to connect without using the game's client! (" << player.ip << ")" << std::endl;
fflush(stdout);
break;
}
if(result != -1)
notify_players(&players, &player, &incoming_packet);
}
manual_disconnect(&player, &players);
close((intptr_t)pclient_fd);
return 0;
}
int waiting_loop(std::vector<Player*>* players, int fps, bool* visual)
{
if(*visual)
{
setup_ncurses();
while(1)
{
if(getch() == 'q')
goto end;
draw_game(players);
usleep(1000000 / fps);
}
end:
endwin();
}
return 0;
}
int notify_players( std::vector<Player*>* players, Player* sender_player, Packet* packet)
{
for(Player* player : *players)
{
if(player->sender_id != sender_player->sender_id)
if(send(player->fd, (const char*)packet, sizeof(*packet), 0) < 0)
manual_disconnect(player, players);
}
return 0;
}
int manual_disconnect(Player* player, std::vector<Player*>* players)
{
Packet packet {};
packet.type = PacketType::packet_disconnect;
packet.sender_id = player->sender_id;
packet.data.packet_disconnect.player = *player;
int result = handle_incoming_packet(player, &packet, players);
notify_players(players, player, &packet);
return result;
}
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