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protocollogin.cpp
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protocollogin.cpp
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/**
* The Forgotten Server - a free and open-source MMORPG server emulator
* Copyright (C) 2019 Mark Samman <mark.samman@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "otpch.h"
#include "protocollogin.h"
#include "outputmessage.h"
#include "tasks.h"
#include "configmanager.h"
#include "iologindata.h"
#include "ban.h"
#include "game.h"
#include <fmt/format.h>
extern ConfigManager g_config;
extern Game g_game;
void ProtocolLogin::disconnectClient(const std::string& message, uint16_t version)
{
auto output = OutputMessagePool::getOutputMessage();
output->addByte(version >= 1076 ? 0x0B : 0x0A);
output->addString(message);
send(output);
disconnect();
}
void ProtocolLogin::getCharacterList(const std::string& accountName, const std::string& password, const std::string&, uint16_t version)
{
Account account;
if (!IOLoginData::loginserverAuthentication(accountName, password, account)) {
disconnectClient("Account name or password is not correct.", version);
return;
}
//uint32_t ticks = time(nullptr) / AUTHENTICATOR_PERIOD;
auto output = OutputMessagePool::getOutputMessage();
/*if (!account.key.empty()) {
if (token.empty() || !(token == generateToken(account.key, ticks) || token == generateToken(account.key, ticks - 1) || token == generateToken(account.key, ticks + 1))) {
output->addByte(0x0D);
output->addByte(0);
send(output);
disconnect();
return;
}
output->addByte(0x0C);
output->addByte(0);
}*/
const std::string& motd = g_config.getString(ConfigManager::MOTD);
if (!motd.empty()) {
//Add MOTD
output->addByte(0x14);
output->addString(fmt::format("{:d}\n{:s}", g_game.getMotdNum(), motd));
}
//Add session key
//output->addByte(0x28);
//output->addString(accountName + "\n" + password + "\n" + token + "\n" + std::to_string(ticks));
//Add char list
output->addByte(0x64);
uint8_t size = std::min<size_t>(std::numeric_limits<uint8_t>::max(), account.characters.size());
output->addByte(size);
for (uint8_t i = 0; i < size; i++) {
output->addString(account.characters[i]);
output->addString(g_config.getString(ConfigManager::SERVER_NAME));
output->add<uint32_t>(g_config.getNumber(ConfigManager::IP_NUM));
output->add<uint16_t>(g_config.getNumber(ConfigManager::GAME_PORT));
}
/*uint8_t size = std::min<size_t>(std::numeric_limits<uint8_t>::max(), account.characters.size());
if (g_config.getBoolean(ConfigManager::ONLINE_OFFLINE_CHARLIST)) {
output->addByte(2); // number of worlds
for (uint8_t i = 0; i < 2; i++) {
output->addByte(i); // world id
output->addString(i == 0 ? "Offline" : "Online");
output->addString(g_config.getString(ConfigManager::IP));
output->add<uint16_t>(g_config.getNumber(ConfigManager::GAME_PORT));
output->addByte(0);
}
} else {
output->addByte(1); // number of worlds
output->addByte(0); // world id
output->addString(g_config.getString(ConfigManager::SERVER_NAME));
output->addString(g_config.getString(ConfigManager::IP));
output->add<uint16_t>(g_config.getNumber(ConfigManager::GAME_PORT));
output->addByte(0);
}
output->addByte(size);
for (uint8_t i = 0; i < size; i++) {
const std::string& character = account.characters[i];
if (g_config.getBoolean(ConfigManager::ONLINE_OFFLINE_CHARLIST)) {
output->addByte(g_game.getPlayerByName(character) ? 1 : 0);
} else {
output->addByte(0);
}
output->addString(character);
}*/
//Add premium days
//output->addByte(0);
if (g_config.getBoolean(ConfigManager::FREE_PREMIUM)) {
//output->addByte(1);
//output->add<uint32_t>(0);
output->add<uint16_t>(0xFFFF); //client displays free premium
} else {
//output->addByte(account.premiumEndsAt > time(nullptr) ? 1 : 0);
//output->add<uint32_t>(account.premiumEndsAt);
output->add<uint16_t>(std::max<time_t>(0, account.premiumEndsAt - time(nullptr)) / 86400);
}
send(output);
disconnect();
}
void ProtocolLogin::onRecvFirstMessage(NetworkMessage& msg)
{
if (g_game.getGameState() == GAME_STATE_SHUTDOWN) {
disconnect();
return;
}
msg.skipBytes(2); // client OS
uint16_t version = msg.get<uint16_t>();
if (version >= 971) {
msg.skipBytes(17);
} else {
msg.skipBytes(12);
}
/*
* Skipped bytes:
* 4 bytes: protocolVersion
* 12 bytes: dat, spr, pic signatures (4 bytes each)
* 1 byte: 0
*/
if (version < 760) {
disconnectClient(fmt::format("Only clients with protocol {:s} allowed!", CLIENT_VERSION_STR), version);
return;
}
if (!Protocol::RSA_decrypt(msg)) {
disconnect();
return;
}
xtea::key key;
key[0] = msg.get<uint32_t>();
key[1] = msg.get<uint32_t>();
key[2] = msg.get<uint32_t>();
key[3] = msg.get<uint32_t>();
enableXTEAEncryption();
setXTEAKey(std::move(key));
if (version < CLIENT_VERSION_MIN || version > CLIENT_VERSION_MAX) {
disconnectClient(fmt::format("Only clients with protocol {:s} allowed!", CLIENT_VERSION_STR), version);
return;
}
if (g_game.getGameState() == GAME_STATE_STARTUP) {
disconnectClient("Gameworld is starting up. Please wait.", version);
return;
}
if (g_game.getGameState() == GAME_STATE_MAINTAIN) {
disconnectClient("Gameworld is under maintenance.\nPlease re-connect in a while.", version);
return;
}
BanInfo banInfo;
auto connection = getConnection();
if (!connection) {
return;
}
if (IOBan::isIpBanned(connection->getIP(), banInfo)) {
if (banInfo.reason.empty()) {
banInfo.reason = "(none)";
}
disconnectClient(fmt::format("Your IP has been banned until {:s} by {:s}.\n\nReason specified:\n{:s}", formatDateShort(banInfo.expiresAt), banInfo.bannedBy, banInfo.reason), version);
return;
}
uint32_t accountNumber = msg.get<uint32_t>();
if (accountNumber == 0) {
disconnectClient("Invalid account number.", version);
return;
}
const std::string& accountName = std::to_string(accountNumber);
if (accountName.empty()) {
disconnectClient("Invalid account number.", version);
return;
}
const std::string& password = msg.getString();
if (password.empty()) {
disconnectClient("Invalid password.", version);
return;
}
// OTCv8 version detection
uint16_t otclientV8 = 0;
uint16_t otcV8StringLength = msg.get<uint16_t>();
if (otcV8StringLength == 5 && msg.getString(5) == "OTCv8") {
otclientV8 = msg.get<uint16_t>(); // 253, 260, 261, ...
}
// read authenticator token and stay logged in flag from last 128 bytes
/*msg.skipBytes((msg.getLength() - 128) - msg.getBufferPosition());
if (!Protocol::RSA_decrypt(msg)) {
disconnectClient("Invalid authentication token.", version);
return;
}
std::string authToken = msg.getString();*/
auto thisPtr = std::static_pointer_cast<ProtocolLogin>(shared_from_this());
g_dispatcher.addTask(createTask(std::bind(&ProtocolLogin::getCharacterList, thisPtr, accountName, password, "", version)));
}