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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "encryption.hpp"
#define ERROR_LOG(msg, ...) printf("[!] "); printf(msg, ##__VA_ARGS__); fflush(stdout);
#define INFO_LOG(msg, ...) printf("[+] "); printf(msg, ##__VA_ARGS__); fflush(stdout);
#define PRINT_MSG(name, id, msg, sv) if(sv) printf("[%s]: %s", name, msg); else printf("[%s-%d]: %s", name, id, msg); fflush(stdout);
int start_client(std::vector<int>* clients, Options* options);
int handle_incoming_packet(Packet* packet, int* clientfd, std::vector<int>* clients, Options* options);
int handle_packet_connect(PacketConnect* packet, int* clientfd, std::vector<int>* clients, Options* options);
int handle_packet_disconnect(PacketDisconnect* packet, int* clientfd, std::vector<int>* clients, Options* options);
int handle_packet_message(PacketMessage* packet, int* clientfd, std::vector<int>* clients, Options* options);
int notify_clients(Packet* packet, std::vector<int>* clients, Options* options);
int send_packet(Packet* packet, int* sockfd, Options* options, void* extra_data);
int add_client(int* clientfd, std::vector<int>* clients);
int remove_client(int* clientfd, std::vector<int>* clients);
int enable_echo();
int disable_echo();
int start_client(std::vector<int>* clients, Options* options)
{
char* stc;
size_t bytes;
while(1)
{
stc = NULL;
getline(&stc, &bytes, stdin); //need to make it so it doesnt print to terminal
//disable_echo();
Packet packet {};
packet.type = PacketType::packet_message;
packet.data.packet_message.server = options->server;
strncpy(packet.data.packet_message.name, options->name, sizeof(packet.data.packet_message.name));
strncpy(packet.data.packet_message.message, stc, sizeof(packet.data.packet_message));
if(options->server)
{
if(options->encryption)
encrypt(options, (char*)&packet, sizeof(packet));
handle_incoming_packet(&packet, &options->sockfd, clients, options);
}
else
if(send_packet(&packet, &options->sockfd, options, NULL))
{
free(stc);
return 0;
}
free(stc);
}
return 0;
}
int handle_incoming_packet(Packet* packet, int* sockfd, std::vector<int>* clients, Options* options)
{
int status = decrypt(options, (char*)packet, sizeof(*packet));
if(!status)
switch(packet->type)
{
case PacketType::packet_connect:
status = handle_packet_connect(&packet->data.packet_connect, sockfd, clients, options);
break;
case PacketType::packet_disconnect:
status = handle_packet_disconnect(&packet->data.packet_disconnect, sockfd, clients, options);
break;
case PacketType::packet_message:
status = handle_packet_message(&packet->data.packet_message, sockfd, options->server ? clients : NULL, options);
break;
case PacketType::packet_ping:
status = -2; //dont notify
break;
default:
status = -1;
break;
}
if(options->server && !status)
status = notify_clients(packet, clients, options);
return status;
}
int handle_packet_connect(PacketConnect* packet, int* clientfd, std::vector<int>* clients, Options* options)
{
int status = 0;
if(options->server)
{
if(options->pass && (!packet->pass || strcmp(options->password, packet->password)))
{
status = -3;
INFO_LOG("Player tried to join with an incorrect password.\n");
close(*clientfd);
goto end;
}
status = add_client(clientfd, clients);
}
INFO_LOG("%s joined the chat!\n", packet->name);
end:
return status;
}
int handle_packet_disconnect(PacketDisconnect* packet, int* clientfd, std::vector<int>* clients, Options* options)
{
int status = 0;
if(options->server)
status = remove_client(clientfd, clients);
INFO_LOG("%s left the chat!\n", packet->name);
return status;
}
int handle_packet_message(PacketMessage* packet, int* clientfd, std::vector<int>* clients, Options* options)
{
if(options->server)
{
packet->client_fd = *clientfd;
std::vector<int>::iterator pos = std::find(clients->begin(), clients->end(), *clientfd);
if(*clientfd != options->sockfd && pos == clients->end())
return 1;
}
packet->client_fd = *clientfd;
if(!options->server || options->interactive)
{
PRINT_MSG(packet->name, packet->client_fd, packet->message, packet->server);
}
return 0;
}
int notify_clients(Packet* packet, std::vector<int>* clients, Options* options)
{
for(int clientfd : *clients)
if(send_packet(packet, &clientfd, options, NULL))
return 1;
return 0;
}
int send_packet(Packet* packet, int* sockfd, Options* options, void* extra_data)
{
int status = encrypt(options, (char*)packet, sizeof(*packet));
if(status)
return status;
if(send(*sockfd, (const char*)packet, sizeof(*packet), 0) < 0)
status = 1;
status = decrypt(options, (char*)packet, sizeof(*packet));
return status;
}
int add_client(int* clientfd, std::vector<int>* clients)
{
std::vector<int>::iterator pos = std::find(clients->begin(), clients->end(), *clientfd);
if(pos == clients->end())
{
clients->push_back(*clientfd);
return 0;
}
return 1;
}
int remove_client(int* clientfd, std::vector<int>* clients)
{
std::vector<int>::iterator pos = std::find(clients->begin(), clients->end(), *clientfd);
if(pos != clients->end())
{
clients->erase(pos);
return 0;
}
close(*clientfd);
return 1;
}
int enable_echo()
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag |= ECHO;
tcsetattr(0, TCSAFLUSH, &term);
return 0;
}
int disable_echo()
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag &= ~ECHO;
tcsetattr(0, TCSAFLUSH, &term);
return 0;
}
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