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protocolgame.cpp
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// Copyright 2023 The Forgotten Server Authors. All rights reserved.
// Use of this source code is governed by the GPL-2.0 License that can be found in the LICENSE file.
#include "otpch.h"
#include "protocolgame.h"
#include "ban.h"
#include "base64.h"
#include "condition.h"
#include "configmanager.h"
#include "depotchest.h"
#include "game.h"
#include "inbox.h"
#include "iologindata.h"
#include "iomarket.h"
#include "monster.h"
#include "npc.h"
#include "outfit.h"
#include "outputmessage.h"
#include "player.h"
#include "podium.h"
#include "scheduler.h"
#include "storeinbox.h"
extern CreatureEvents* g_creatureEvents;
extern Chat* g_chat;
namespace {
std::deque<std::pair<int64_t, uint32_t>> waitList; // (timeout, player guid)
auto priorityEnd = waitList.end();
auto findClient(uint32_t guid)
{
std::size_t slot = 1;
for (auto it = waitList.begin(), end = waitList.end(); it != end; ++it, ++slot) {
if (it->second == guid) {
return std::make_pair(it, slot);
}
}
return std::make_pair(waitList.end(), slot);
}
constexpr int64_t getWaitTime(std::size_t slot)
{
if (slot < 5) {
return 5;
} else if (slot < 10) {
return 10;
} else if (slot < 20) {
return 20;
} else if (slot < 50) {
return 60;
}
return 120;
}
constexpr int64_t getTimeout(std::size_t slot)
{
// timeout is set to 15 seconds longer than expected retry attempt
return getWaitTime(slot) + 15;
}
std::size_t clientLogin(const Player& player)
{
if (player.hasFlag(PlayerFlag_CanAlwaysLogin) || player.getAccountType() >= ACCOUNT_TYPE_GAMEMASTER) {
return 0;
}
uint32_t maxPlayers = static_cast<uint32_t>(getNumber(ConfigManager::MAX_PLAYERS));
if (maxPlayers == 0 || (waitList.empty() && g_game.getPlayersOnline() < maxPlayers)) {
return 0;
}
int64_t time = OTSYS_TIME();
auto it = waitList.begin();
while (it != waitList.end()) {
if ((it->first - time) <= 0) {
it = waitList.erase(it);
} else {
++it;
}
}
std::size_t slot;
std::tie(it, slot) = findClient(player.getGUID());
if (it != waitList.end()) {
// If server has capacity for this client, let him in even though his current slot might be higher than 0.
if ((g_game.getPlayersOnline() + slot) <= maxPlayers) {
waitList.erase(it);
return 0;
}
// let them wait a bit longer
it->first = time + (getTimeout(slot) * 1000);
return slot;
}
if (player.isPremium()) {
priorityEnd = waitList.emplace(priorityEnd, time + (getTimeout(slot + 1) * 1000), player.getGUID());
return std::distance(waitList.begin(), priorityEnd);
}
waitList.emplace_back(time + (getTimeout(waitList.size() + 1) * 1000), player.getGUID());
return waitList.size();
}
ClientDamageType getClientDamageType(CombatType_t combatType)
{
switch (combatType) {
case COMBAT_PHYSICALDAMAGE:
return CLIENT_DAMAGETYPE_PHYSICAL;
case COMBAT_ENERGYDAMAGE:
return CLIENT_DAMAGETYPE_ENERGY;
case COMBAT_EARTHDAMAGE:
return CLIENT_DAMAGETYPE_EARTH;
case COMBAT_FIREDAMAGE:
return CLIENT_DAMAGETYPE_FIRE;
case COMBAT_LIFEDRAIN:
return CLIENT_DAMAGETYPE_LIFEDRAIN;
case COMBAT_HEALING:
return CLIENT_DAMAGETYPE_HEALING;
case COMBAT_DROWNDAMAGE:
return CLIENT_DAMAGETYPE_DROWN;
case COMBAT_ICEDAMAGE:
return CLIENT_DAMAGETYPE_ICE;
case COMBAT_HOLYDAMAGE:
return CLIENT_DAMAGETYPE_HOLY;
case COMBAT_DEATHDAMAGE:
return CLIENT_DAMAGETYPE_DEATH;
default:
return CLIENT_DAMAGETYPE_UNDEFINED;
}
}
} // namespace
void ProtocolGame::release()
{
// dispatcher thread
if (player && player->client == shared_from_this()) {
player->client.reset();
player->decrementReferenceCounter();
player = nullptr;
}
tfs::net::remove_protocol_from_autosend(shared_from_this());
Protocol::release();
}
void ProtocolGame::login(uint32_t characterId, uint32_t accountId, OperatingSystem_t operatingSystem)
{
// dispatcher thread
Player* foundPlayer = g_game.getPlayerByGUID(characterId);
if (!foundPlayer || getBoolean(ConfigManager::ALLOW_CLONES)) {
player = new Player(getThis());
player->incrementReferenceCounter();
player->setID();
player->setGUID(characterId);
if (!IOLoginData::preloadPlayer(player)) {
disconnectClient("Your character could not be loaded.");
return;
}
if (IOBan::isPlayerNamelocked(player->getGUID())) {
disconnectClient("Your character has been namelocked.");
return;
}
if (g_game.getGameState() == GAME_STATE_CLOSING && !player->hasFlag(PlayerFlag_CanAlwaysLogin)) {
disconnectClient("The game is just going down.\nPlease try again later.");
return;
}
if (g_game.getGameState() == GAME_STATE_CLOSED && !player->hasFlag(PlayerFlag_CanAlwaysLogin)) {
disconnectClient("Server is currently closed.\nPlease try again later.");
return;
}
if (getBoolean(ConfigManager::ONE_PLAYER_ON_ACCOUNT) && player->getAccountType() < ACCOUNT_TYPE_GAMEMASTER &&
g_game.getPlayerByAccount(player->getAccount())) {
disconnectClient("You may only login with one character\nof your account at the same time.");
return;
}
if (!player->hasFlag(PlayerFlag_CannotBeBanned)) {
if (const auto& banInfo = IOBan::getAccountBanInfo(accountId)) {
if (banInfo->expiresAt > 0) {
disconnectClient(
fmt::format("Your account has been banned until {:s} by {:s}.\n\nReason specified:\n{:s}",
formatDateShort(banInfo->expiresAt), banInfo->bannedBy, banInfo->reason));
} else {
disconnectClient(
fmt::format("Your account has been permanently banned by {:s}.\n\nReason specified:\n{:s}",
banInfo->bannedBy, banInfo->reason));
}
return;
}
}
if (std::size_t currentSlot = clientLogin(*player)) {
uint8_t retryTime = getWaitTime(currentSlot);
auto output = tfs::net::make_output_message();
output->addByte(0x16);
output->addString(
fmt::format("Too many players online.\nYou are at place {:d} on the waiting list.", currentSlot));
output->addByte(retryTime);
send(output);
disconnect();
return;
}
if (!IOLoginData::loadPlayerById(player, player->getGUID())) {
disconnectClient("Your character could not be loaded.");
return;
}
player->setOperatingSystem(operatingSystem);
if (!g_game.placeCreature(player, player->getLoginPosition())) {
if (!g_game.placeCreature(player, player->getTemplePosition(), false, true)) {
disconnectClient("Temple position is wrong. Contact the administrator.");
return;
}
}
if (operatingSystem >= CLIENTOS_OTCLIENT_LINUX) {
player->registerCreatureEvent("ExtendedOpcode");
}
player->lastIP = player->getIP();
player->lastLoginSaved = std::max<time_t>(time(nullptr), player->lastLoginSaved + 1);
acceptPackets = true;
} else {
if (eventConnect != 0 || !getBoolean(ConfigManager::REPLACE_KICK_ON_LOGIN)) {
// Already trying to connect
disconnectClient("You are already logged in.");
return;
}
if (foundPlayer->client) {
foundPlayer->disconnect();
foundPlayer->isConnecting = true;
eventConnect = g_scheduler.addEvent(
createSchedulerTask(1000, [=, thisPtr = getThis(), playerID = foundPlayer->getID()]() {
thisPtr->connect(playerID, operatingSystem);
}));
} else {
connect(foundPlayer->getID(), operatingSystem);
}
}
tfs::net::insert_protocol_to_autosend(shared_from_this());
}
void ProtocolGame::connect(uint32_t playerId, OperatingSystem_t operatingSystem)
{
// dispatcher thread
eventConnect = 0;
Player* foundPlayer = g_game.getPlayerByID(playerId);
if (!foundPlayer || foundPlayer->client) {
disconnectClient("You are already logged in.");
return;
}
if (isConnectionExpired()) {
// ProtocolGame::release() has been called at this point and the Connection object no longer exists, so we
// return to prevent leakage of the Player.
return;
}
player = foundPlayer;
player->incrementReferenceCounter();
g_chat->removeUserFromAllChannels(*player);
player->clearModalWindows();
player->setOperatingSystem(operatingSystem);
player->isConnecting = false;
player->client = getThis();
sendAddCreature(player, player->getPosition(), 0);
player->lastIP = player->getIP();
player->lastLoginSaved = std::max<time_t>(time(nullptr), player->lastLoginSaved + 1);
player->resetIdleTime();
acceptPackets = true;
g_creatureEvents->playerReconnect(player);
}
void ProtocolGame::logout(bool displayEffect, bool forced)
{
// dispatcher thread
if (!player) {
return;
}
if (!player->isRemoved()) {
if (!forced) {
if (!player->isAccessPlayer()) {
if (player->getTile()->hasFlag(TILESTATE_NOLOGOUT)) {
player->sendCancelMessage(RETURNVALUE_YOUCANNOTLOGOUTHERE);
return;
}
if (!player->getTile()->hasFlag(TILESTATE_PROTECTIONZONE) && player->hasCondition(CONDITION_INFIGHT)) {
player->sendCancelMessage(RETURNVALUE_YOUMAYNOTLOGOUTDURINGAFIGHT);
return;
}
}
// scripting event - onLogout
if (!g_creatureEvents->playerLogout(player)) {
// Let the script handle the error message
return;
}
}
if (displayEffect && !player->isDead() && !player->isInGhostMode()) {
g_game.addMagicEffect(player->getPosition(), CONST_ME_POFF);
}
}
sendSessionEnd(forced ? SESSION_END_FORCECLOSE : SESSION_END_LOGOUT);
disconnect();
g_game.removeCreature(player);
}
// Login to the game world request
void ProtocolGame::onRecvFirstMessage(NetworkMessage& msg)
{
// Server is shutting down
if (g_game.getGameState() == GAME_STATE_SHUTDOWN) {
disconnect();
return;
}
// Client type and OS used
OperatingSystem_t operatingSystem = static_cast<OperatingSystem_t>(msg.get<uint16_t>());
version = msg.get<uint16_t>(); // U16 client version
msg.skipBytes(4); // U32 client version
// String client version
if (version >= 1240) {
if (msg.getRemainingBufferLength() > 132) {
msg.getString();
}
}
msg.skipBytes(3); // U16 dat revision, U8 preview state
// Disconnect if RSA decrypt fails
if (!Protocol::RSA_decrypt(msg)) {
disconnect();
return;
}
// Get XTEA key
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));
// Enable extended opcode feature for otclient
if (operatingSystem >= CLIENTOS_OTCLIENT_LINUX) {
NetworkMessage opcodeMessage;
opcodeMessage.addByte(0x32);
opcodeMessage.addByte(0x00);
opcodeMessage.add<uint16_t>(0x00);
writeToOutputBuffer(opcodeMessage);
}
// Change packet verifying mode for QT clients
if (version >= 1111 && operatingSystem >= CLIENTOS_QT_LINUX && operatingSystem < CLIENTOS_OTCLIENT_LINUX) {
setChecksumMode(CHECKSUM_SEQUENCE);
}
// Web login skips the character list request so we need to check the client version again
if (version < CLIENT_VERSION_MIN || version > CLIENT_VERSION_MAX) {
disconnectClient(fmt::format("Only clients with protocol {:s} allowed!", CLIENT_VERSION_STR));
return;
}
msg.skipBytes(1); // Gamemaster flag
auto sessionToken = tfs::base64::decode(msg.getString());
if (sessionToken.empty()) {
disconnectClient("Malformed session key.");
return;
}
if (operatingSystem == CLIENTOS_QT_LINUX) {
msg.getString(); // OS name (?)
msg.getString(); // OS version (?)
}
auto characterName = msg.getString();
uint32_t timeStamp = msg.get<uint32_t>();
uint8_t randNumber = msg.getByte();
if (challengeTimestamp != timeStamp || challengeRandom != randNumber) {
disconnect();
return;
}
if (g_game.getGameState() == GAME_STATE_STARTUP) {
disconnectClient("Gameworld is starting up. Please wait.");
return;
}
if (g_game.getGameState() == GAME_STATE_MAINTAIN) {
disconnectClient("Gameworld is under maintenance. Please re-connect in a while.");
return;
}
auto ip = getIP();
if (const auto& banInfo = IOBan::getIpBanInfo(ip)) {
disconnectClient(fmt::format("Your IP has been banned until {:s} by {:s}.\n\nReason specified:\n{:s}",
formatDateShort(banInfo->expiresAt), banInfo->bannedBy, banInfo->reason));
return;
}
Database& db = Database::getInstance();
auto result = db.storeQuery(fmt::format(
"SELECT `a`.`id` AS `account_id`, INET6_NTOA(`s`.`ip`) AS `session_ip`, `p`.`id` AS `character_id` FROM `accounts` `a` JOIN `sessions` `s` ON `a`.`id` = `s`.`account_id` JOIN `players` `p` ON `a`.`id` = `p`.`account_id` WHERE `s`.`token` = {:s} AND `s`.`expired_at` IS NULL AND `p`.`name` = {:s} AND `p`.`deletion` = 0",
db.escapeString(sessionToken), db.escapeString(characterName)));
if (!result) {
disconnectClient("Account name or password is not correct.");
return;
}
uint32_t accountId = result->getNumber<uint32_t>("account_id");
if (accountId == 0) {
disconnectClient("Account name or password is not correct.");
return;
}
Connection::Address sessionIP = boost::asio::ip::make_address(result->getString("session_ip"));
if (!sessionIP.is_loopback() && ip != sessionIP) {
disconnectClient("Your game session is already locked to a different IP. Please log in again.");
}
g_dispatcher.addTask([=, thisPtr = getThis(), characterId = result->getNumber<uint32_t>("character_id")]() {
thisPtr->login(characterId, accountId, operatingSystem);
});
}
void ProtocolGame::onConnect()
{
auto output = tfs::net::make_output_message();
static std::random_device rd;
static std::ranlux24 generator(rd());
static std::uniform_int_distribution<uint16_t> randNumber(0x00, 0xFF);
// Skip checksum
output->skipBytes(sizeof(uint32_t));
// Packet length & type
output->add<uint16_t>(0x0006);
output->addByte(0x1F);
// Add timestamp & random number
challengeTimestamp = static_cast<uint32_t>(time(nullptr));
output->add<uint32_t>(challengeTimestamp);
challengeRandom = randNumber(generator);
output->addByte(challengeRandom);
// Go back and write checksum
output->skipBytes(-12);
output->add<uint32_t>(adlerChecksum(output->getOutputBuffer() + sizeof(uint32_t), 8));
send(output);
}
void ProtocolGame::disconnectClient(const std::string& message) const
{
auto output = tfs::net::make_output_message();
output->addByte(0x14);
output->addString(message);
send(output);
disconnect();
}
void ProtocolGame::writeToOutputBuffer(const NetworkMessage& msg)
{
auto out = getOutputBuffer(msg.getLength());
out->append(msg);
}
void ProtocolGame::parsePacket(NetworkMessage& msg)
{
if (!acceptPackets || g_game.getGameState() == GAME_STATE_SHUTDOWN || msg.isEmpty()) {
return;
}
uint8_t recvbyte = msg.getByte();
if (!player) {
if (recvbyte == 0x0F) {
disconnect();
}
return;
}
// a dead player can not performs actions
if (player->isRemoved() || player->isDead()) {
if (recvbyte == 0x0F) {
disconnect();
return;
}
if (recvbyte != 0x14) {
return;
}
}
switch (recvbyte) {
case 0x14:
g_dispatcher.addTask([thisPtr = getThis()]() { thisPtr->logout(true, false); });
break;
case 0x1D:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerReceivePingBack(playerID); });
break;
case 0x1E:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerReceivePing(playerID); });
break;
// case 0x2A: break; // bestiary tracker
// case 0x2C: break; // team finder (leader)
// case 0x2D: break; // team finder (member)
// case 0x28: break; // stash withdraw
case 0x32:
parseExtendedOpcode(msg);
break; // otclient extended opcode
case 0x64:
parseAutoWalk(msg);
break;
case 0x65:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_NORTH); });
break;
case 0x66:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_EAST); });
break;
case 0x67:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_SOUTH); });
break;
case 0x68:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_WEST); });
break;
case 0x69:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerStopAutoWalk(playerID); });
break;
case 0x6A:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_NORTHEAST); });
break;
case 0x6B:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_SOUTHEAST); });
break;
case 0x6C:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_SOUTHWEST); });
break;
case 0x6D:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerMove(playerID, DIRECTION_NORTHWEST); });
break;
case 0x6F:
g_dispatcher.addTask(DISPATCHER_TASK_EXPIRATION,
[playerID = player->getID()]() { g_game.playerTurn(playerID, DIRECTION_NORTH); });
break;
case 0x70:
g_dispatcher.addTask(DISPATCHER_TASK_EXPIRATION,
[playerID = player->getID()]() { g_game.playerTurn(playerID, DIRECTION_EAST); });
break;
case 0x71:
g_dispatcher.addTask(DISPATCHER_TASK_EXPIRATION,
[playerID = player->getID()]() { g_game.playerTurn(playerID, DIRECTION_SOUTH); });
break;
case 0x72:
g_dispatcher.addTask(DISPATCHER_TASK_EXPIRATION,
[playerID = player->getID()]() { g_game.playerTurn(playerID, DIRECTION_WEST); });
break;
case 0x77:
parseEquipObject(msg);
break;
case 0x78:
parseThrow(msg);
break;
case 0x79:
parseLookInShop(msg);
break;
case 0x7A:
parsePlayerPurchase(msg);
break;
case 0x7B:
parsePlayerSale(msg);
break;
case 0x7C:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerCloseShop(playerID); });
break;
case 0x7D:
parseRequestTrade(msg);
break;
case 0x7E:
parseLookInTrade(msg);
break;
case 0x7F:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerAcceptTrade(playerID); });
break;
case 0x80:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerCloseTrade(playerID); });
break;
case 0x82:
parseUseItem(msg);
break;
case 0x83:
parseUseItemEx(msg);
break;
case 0x84:
parseUseWithCreature(msg);
break;
case 0x85:
parseRotateItem(msg);
break;
case 0x86:
parseEditPodiumRequest(msg);
break;
case 0x87:
parseCloseContainer(msg);
break;
case 0x88:
parseUpArrowContainer(msg);
break;
case 0x89:
parseTextWindow(msg);
break;
case 0x8A:
parseHouseWindow(msg);
break;
case 0x8B:
parseWrapItem(msg);
break;
case 0x8C:
parseLookAt(msg);
break;
case 0x8D:
parseLookInBattleList(msg);
break;
case 0x8E: /* join aggression */
break;
// case 0x8F: break; // quick loot
// case 0x90: break; // loot container
// case 0x91: break; // update loot whitelist
// case 0x92: break; // request locker items
case 0x96:
parseSay(msg);
break;
case 0x97:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerRequestChannels(playerID); });
break;
case 0x98:
parseOpenChannel(msg);
break;
case 0x99:
parseCloseChannel(msg);
break;
case 0x9A:
parseOpenPrivateChannel(msg);
break;
case 0x9E:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerCloseNpcChannel(playerID); });
break;
case 0xA0:
parseFightModes(msg);
break;
case 0xA1:
parseAttack(msg);
break;
case 0xA2:
parseFollow(msg);
break;
case 0xA3:
parseInviteToParty(msg);
break;
case 0xA4:
parseJoinParty(msg);
break;
case 0xA5:
parseRevokePartyInvite(msg);
break;
case 0xA6:
parsePassPartyLeadership(msg);
break;
case 0xA7:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerLeaveParty(playerID); });
break;
case 0xA8:
parseEnableSharedPartyExperience(msg);
break;
case 0xAA:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerCreatePrivateChannel(playerID); });
break;
case 0xAB:
parseChannelInvite(msg);
break;
case 0xAC:
parseChannelExclude(msg);
break;
// case 0xB1: break; // request highscores
case 0xBE:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerCancelAttackAndFollow(playerID); });
break;
// case 0xC7: break; // request tournament leaderboard
case 0xC9: /* update tile */
break;
case 0xCA:
parseUpdateContainer(msg);
break;
case 0xCB:
parseBrowseField(msg);
break;
case 0xCC:
parseSeekInContainer(msg);
break;
// case 0xCD: break; // request inspect window
case 0xD2:
g_dispatcher.addTask([playerID = player->getID()]() { g_game.playerRequestOutfit(playerID); });
break;
case 0xD3:
parseSetOutfit(msg);
break;
// case 0xD5: break; // apply imbuement
// case 0xD6: break; // clear imbuement
// case 0xD7: break; // close imbuing window
case 0xDC:
parseAddVip(msg);
break;
case 0xDD:
parseRemoveVip(msg);
break;
case 0xDE:
parseEditVip(msg);
break;
// case 0xDF: break; // premium shop (?)
// case 0xE0: break; // premium shop (?)
// case 0xE4: break; // buy charm rune
// case 0xE5: break; // request character info (cyclopedia)
// case 0xE6: break // parse bug report
case 0xE7: /* thank you */
break;
case 0xE8:
parseDebugAssert(msg);
break;
// case 0xEF: break; // request store coins transfer
case 0xF2:
parseRuleViolationReport(msg);
break;
case 0xF3: /* get object info */
break;
case 0xF4:
parseMarketLeave();
break;
case 0xF5:
parseMarketBrowse(msg);
break;
case 0xF6:
parseMarketCreateOffer(msg);
break;
case 0xF7:
parseMarketCancelOffer(msg);
break;
case 0xF8:
parseMarketAcceptOffer(msg);
break;
case 0xF9:
parseModalWindowAnswer(msg);
break;
// case 0xFA: break; // store window open
// case 0xFB: break; // store window click
// case 0xFC: break; // store window buy
// case 0xFD: break; // store window history 1
// case 0xFE: break; // store window history 2
default:
g_dispatcher.addTask([=, playerID = player->getID(), msg = new NetworkMessage(msg)]() {
g_game.parsePlayerNetworkMessage(playerID, recvbyte, msg);
});
break;
}
if (msg.isOverrun()) {
disconnect();
}
}
void ProtocolGame::GetTileDescription(const Tile* tile, NetworkMessage& msg)
{
int32_t count;
Item* ground = tile->getGround();
if (ground) {
msg.addItem(ground);
count = 1;
} else {
count = 0;
}
const TileItemVector* items = tile->getItemList();
if (items) {
for (auto it = items->getBeginTopItem(), end = items->getEndTopItem(); it != end; ++it) {
msg.addItem(*it);
if (++count == MAX_STACKPOS) {
break;
}
}
}
const CreatureVector* creatures = tile->getCreatures();
if (creatures) {
for (auto it = creatures->rbegin(), end = creatures->rend(); it != end; ++it) {
const Creature* creature = (*it);
if (!player->canSeeCreature(creature)) {
continue;
}
bool known;
uint32_t removedKnown;
checkCreatureAsKnown(creature->getID(), known, removedKnown);
AddCreature(msg, creature, known, removedKnown);
++count;
}
}
if (items && count < MAX_STACKPOS) {
for (auto it = items->getBeginDownItem(), end = items->getEndDownItem(); it != end; ++it) {
msg.addItem(*it);
if (++count == MAX_STACKPOS) {
return;
}
}
}
}
void ProtocolGame::GetMapDescription(int32_t x, int32_t y, int32_t z, int32_t width, int32_t height,
NetworkMessage& msg)
{
int32_t skip = -1;
int32_t startz, endz, zstep;
if (z > 7) {
startz = z - 2;
endz = std::min<int32_t>(MAP_MAX_LAYERS - 1, z + 2);
zstep = 1;
} else {
startz = 7;
endz = 0;
zstep = -1;
}
for (int32_t nz = startz; nz != endz + zstep; nz += zstep) {
GetFloorDescription(msg, x, y, nz, width, height, z - nz, skip);
}
if (skip >= 0) {
msg.addByte(skip);
msg.addByte(0xFF);
}
}
void ProtocolGame::GetFloorDescription(NetworkMessage& msg, int32_t x, int32_t y, int32_t z, int32_t width,
int32_t height, int32_t offset, int32_t& skip)
{
for (int32_t nx = 0; nx < width; nx++) {
for (int32_t ny = 0; ny < height; ny++) {
Tile* tile = g_game.map.getTile(x + nx + offset, y + ny + offset, z);
if (tile) {
if (skip >= 0) {
msg.addByte(skip);
msg.addByte(0xFF);
}
skip = 0;
GetTileDescription(tile, msg);
} else if (skip == 0xFE) {
msg.addByte(0xFF);
msg.addByte(0xFF);
skip = -1;
} else {
++skip;
}
}
}
}
void ProtocolGame::checkCreatureAsKnown(uint32_t id, bool& known, uint32_t& removedKnown)
{
auto result = knownCreatureSet.insert(id);
if (!result.second) {
known = true;
return;
}
known = false;
if (knownCreatureSet.size() > 1300) {
// Look for a creature to remove
for (auto it = knownCreatureSet.begin(), end = knownCreatureSet.end(); it != end; ++it) {
Creature* creature = g_game.getCreatureByID(*it);
if (!canSee(creature)) {
removedKnown = *it;
knownCreatureSet.erase(it);
return;
}
}
// Bad situation. Let's just remove anyone.
auto it = knownCreatureSet.begin();
if (*it == id) {
++it;
}
removedKnown = *it;
knownCreatureSet.erase(it);
} else {
removedKnown = 0;
}
}
bool ProtocolGame::canSee(const Creature* c) const
{
if (!c || !player || c->isRemoved()) {
return false;
}
if (!player->canSeeCreature(c)) {
return false;
}
return canSee(c->getPosition());
}
bool ProtocolGame::canSee(const Position& pos) const { return canSee(pos.x, pos.y, pos.z); }
bool ProtocolGame::canSee(int32_t x, int32_t y, int32_t z) const
{
if (!player) {
return false;
}
const Position& myPos = player->getPosition();
if (myPos.z <= 7) {
// we are on ground level or above (7 -> 0) view is from 7 -> 0
if (z > 7) {
return false;
}
} else { // if (myPos.z >= 8) { we are underground (8 -> 15) view is +/- 2 from the floor we stand on
if (std::abs(myPos.getZ() - z) > 2) {
return false;
}
}
// negative offset means that the action taken place is on a lower floor than ourself
int32_t offsetz = myPos.getZ() - z;
if ((x >= myPos.getX() - Map::maxClientViewportX + offsetz) &&
(x <= myPos.getX() + (Map::maxClientViewportX + 1) + offsetz) &&
(y >= myPos.getY() - Map::maxClientViewportY + offsetz) &&
(y <= myPos.getY() + (Map::maxClientViewportY + 1) + offsetz)) {
return true;
}
return false;
}
// Parse methods
void ProtocolGame::parseChannelInvite(NetworkMessage& msg)
{
auto name = msg.getString();
g_dispatcher.addTask(
[playerID = player->getID(), name = std::string{name}]() { g_game.playerChannelInvite(playerID, name); });
}
void ProtocolGame::parseChannelExclude(NetworkMessage& msg)
{
auto name = msg.getString();
g_dispatcher.addTask(
[=, playerID = player->getID(), name = std::string{name}]() { g_game.playerChannelExclude(playerID, name); });
}
void ProtocolGame::parseOpenChannel(NetworkMessage& msg)