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client.cc
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#include "client.hpp"
#include <iostream>
#include <algorithm>
#include "cp437_to_unicode.hpp"
#include <openssl/rand.h>
#include <time.h>
#include "nanoclock.hpp"
#include "rng.hpp"
#include "dfterm2_limits.hpp"
using namespace std;
using namespace trankesbel;
using namespace dfterm;
using namespace boost;
ClientTelnetSession::ClientTelnetSession() : TelnetSession()
{
};
ClientTelnetSession::~ClientTelnetSession()
{
};
void ClientTelnetSession::setClient(WP<Client> client)
{
this->client = client;
}
bool ClientTelnetSession::writeRawData(const void* data, size_t* size)
{
assert(size);
size_t max_size = (*size);
(*size) = 0;
SP<Client> spc = client.lock();
if (!spc) return false;
SP<Socket> s = spc->getSocket();
if (!s) return false;
if (!s->active()) return false;
if (max_size == 0) return true;
size_t result = 0;
size_t sent = 0;
do
{
result = s->send(&((char*) data)[sent], max_size - sent);
if (result > 0)
{
(*size) += result;
sent += result;
}
if (!s->active()) return false;
} while(result && sent < max_size);
return true;
}
bool ClientTelnetSession::readRawData(void* data, size_t* size)
{
assert(size);
size_t max_size = (*size);
(*size) = 0;
SP<Client> spc = client.lock();
if (!spc) return false;
SP<Socket> s = spc->getSocket();
if (!s) return false;
if (!s->active()) return false;
if (max_size == 0) return true;
size_t result = s->recv(data, max_size);
if (result > 0)
{
(*size) = result;
return true;
}
if (!s->active()) return false;
return true;
}
SP<Client> Client::createClient(SP<Socket> client_socket)
{
SP<Client> c(new Client(client_socket));
c->setSelf(WP<Client>(c));
c->config_interface->setClient(c);
c->ts.handShake();
return c;
}
Client::Client(SP<Socket> client_socket)
{
config_interface = SP<ConfigurationInterface>(new ConfigurationInterface);
last_refresh = 0;
refresh_per_second = 1000000000ULL;
this->client_socket = client_socket;
packet_pending = false;
packet_pending_index = 0;
do_full_redraw = false;
slot_active_in_last_cycle = true;
identified = false;
interface = SP<InterfaceTermemu>(new InterfaceTermemu);
interface->initialize();
/* Register CP437 to unicode maps */
initCharacterMappings();
ui32 i1 = 0;
for (i1 = 0; i1 < 256; ++i1)
{
CursesElement ce(mapCharacter(i1), White, Black, false);
interface->mapElementIdentifier(i1, (void*) &ce, sizeof(ce));
}
user = SP<User>(new User);
config_interface->setInterface(interface);
identify_window = interface->createInterfaceElementWindow();
identify_window->setHint("wide");
identify_window->setTitleUTF8("Enter your nickname for this session");
ui32 index = identify_window->addListElementUTF8("", "nickname", true, true);
identify_window->modifyListSelectionIndex(index);
identify_window->setListCallback(boost::bind(&Client::identifySelectFunction, this, _1));
max_chat_history = 500;
password_enter_time = nanoclock();
/* Hide cursor */
ts.sendPacket("\x1b[?25l", 6);
/* Enable changed lines recording on interface terminal */
Terminal& t = interface->getTerminal();
}
Client::~Client()
{
}
void Client::setSlot(SP<Slot> slot)
{
this->slot = slot;
state.lock()->notifyClient(self.lock());
};
void Client::setState(WP<State> state)
{
this->state = state;
config_interface->setState(state);
}
bool Client::isActive() const
{
assert(client_socket);
return client_socket->active();
}
void Client::sendPrivateChatMessage(const UnicodeString &us)
{
if (!private_chat) private_chat = SP<Logger>(new Logger);
if (!private_chat_reader) private_chat_reader = private_chat->createReader();
private_chat->logMessage(us);
}
void Client::cycleChat()
{
assert(global_chat);
assert(global_chat_reader);
/* Chat window doesn't exist before client
has identified. */
if (!chat_window) return;
while(1)
{
bool message;
UnicodeString us = global_chat_reader->getLogMessage(&message);
if (!message)
{
if (private_chat_reader)
us = private_chat_reader->getLogMessage(&message);
if (!message)
break;
}
UnicodeString chat_str = chat_window->getListElement(chat_window_input_index);
chat_window->deleteListElement(chat_window_input_index);
chat_window_input_index = 0xFFFFFFFF;
chat_window->addListElement(us, "", true, false);
/* Remove first item from list if maximum chat history is reached */
ui32 list_elements = chat_window->getNumberOfListElements();
if (list_elements > max_chat_history)
chat_window->deleteListElement(0);
chat_window_input_index = chat_window->addListElement(chat_str, "Chat> ", "chat", true, true);
chat_window->modifyListSelectionIndex(chat_window_input_index);
}
}
bool Client::cycleCheck()
{
/* make sure client is disconnected when it's not active */
if (!isActive())
{
if (client_socket) client_socket->close();
return false;
}
if (!user) return false;
if (!user->isActive() && client_socket)
{
client_socket->close();
state.lock()->notifyClient(self.lock());
return false;
}
if (identified) identify_window = SP<InterfaceElementWindow>();
return true;
}
void Client::doCycleRefresh()
{
/* Check if client has resized their terminal, adjust
if necessary. */
do_full_redraw = false;
ui32 w, h;
ts.getTerminalSize(&w, &h);
/* Clamp w and h to (10, 300) */
w = (w > 300) ? 300 : w;
h = (h > 300) ? 300 : h;
w = (w < 10) ? 10 : w;
h = (h < 10) ? 10 : h;
if (w != (ui32) buffer_terminal.getWidth() || h != (ui32) buffer_terminal.getHeight())
{
buffer_terminal.resize(w, h);
buffer_terminal.feedString("\x1b[2J", 4);
do_full_redraw = true;
ts.sendPacket("\x1b[2J", 4);
interface->setTerminalSize(w, h);
}
SP<Slot> sp_slot = slot.lock();
if (sp_slot && game_window)
{
string title_utf8 = game_window->getTitleUTF8();
string new_title_utf8("Game");
SP<User> last_user = sp_slot->getLastUser().lock();
if (last_user)
new_title_utf8 += string(" (") + last_user->getNameUTF8() + string(")");
if (!slot_active_in_last_cycle || title_utf8 != new_title_utf8)
game_window->setTitleUTF8(new_title_utf8);
sp_slot->unloadToWindow(game_window);
slot_active_in_last_cycle = true;
}
else if (slot_active_in_last_cycle)
{
if (game_window)
{
game_window->setMinimumSize(10, 10);
game_window->setTitle("Game (inactive)");
slot_active_in_last_cycle = false;
CursesElement ce('X', White, Black, false);
ui32 w, h;
game_window->getSize(&w, &h);
game_window->setScreenDisplayFillNewElement(&ce, sizeof(ce), w, h);
}
}
interface->refresh();
interface->cycle();
Terminal& client_t = interface->getTerminal();
if (packet_pending && ts.isPacketCancellable(packet_pending_index))
ts.cancelPacket(packet_pending_index);
else if (deltas.size() > 0)
{
if (last_client_terminal.getWidth() == buffer_terminal.getWidth() &&
last_client_terminal.getHeight() == buffer_terminal.getHeight())
buffer_terminal.copyPreserve(&last_client_terminal);
deltas.clear();
packet_pending = false;
packet_pending_index = 0;
}
if (last_client_terminal.getWidth() != client_t.getWidth() ||
last_client_terminal.getHeight() != client_t.getHeight())
last_client_terminal.resize(client_t.getWidth(), client_t.getHeight());
last_client_terminal.copyPreserve(&client_t);
if (!do_full_redraw)
client_t.restrictedUpdateCycle(&buffer_terminal, NULL, &deltas);
else
deltas = client_t.updateCycle();
if (deltas.size() > 0)
{
packet_pending_index = ts.sendPacket(deltas.c_str(), deltas.size());
packet_pending = true;
/* If full redraw, throw away the packet indices so that
we can't discard this package */
if (do_full_redraw)
{
packet_pending = false;
packet_pending_index = 0;
deltas.clear();
if (buffer_terminal.getWidth() == client_t.getWidth() &&
buffer_terminal.getHeight() == client_t.getHeight())
buffer_terminal.copyPreserve(&client_t);
}
}
}
void Client::cycle()
{
assert(state.lock());
lock_guard<recursive_mutex> cycle_lock(cycle_mutex);
if (!cycleCheck()) return;
config_interface->cycle();
ts.cycle();
char buf[500];
size_t buf_size = 500;
bool pushed_something = false;
do
{
buf_size = 500;
ts.receive((void*) buf, &buf_size);
if (buf_size == 0) break;
size_t i1;
for (i1 = 0; i1 < buf_size; ++i1)
{
KeyPress kp((KeyCode) buf[i1], false);
interface->pushKeyPress(kp);
pushed_something = true;
}
}
while(buf_size > 0);
if (pushed_something)
{
SP<State> s = state.lock();
if (s)
s->delayedNotifyClient(self.lock(), 1000000000LL);
}
cycleChat();
interface->refresh();
interface->cycle();
bool allowed_refresh = false;
ui64 time_now = nanoclock();
if (last_refresh + 1000000000ULL / refresh_per_second < time_now)
allowed_refresh = true;
if (allowed_refresh)
{
doCycleRefresh();
last_refresh = time_now;
}
else
state.lock()->delayedNotifyClient(self.lock(), time_now - 1000000000ULL / refresh_per_second);
if (!isActive()) return;
if (!user)
{
client_socket->close();
state.lock()->notifyClient(self.lock());
};
if (!user->isActive() && client_socket)
{
client_socket->close();
state.lock()->notifyClient(self.lock());
};
ts.cycle();
}
void Client::setGlobalChatLogger(SP<Logger> global_chat)
{
this->global_chat = global_chat;
global_chat_reader = global_chat->createReader();
};
SP<Logger> Client::getGlobalChatLogger() const
{
return global_chat;
}
bool Client::identifySelectFunction(ui32 index)
{
string select_type = identify_window->getListElementData(index);
if (select_type == "nickname")
{
/* Some restrictions on name. */
UnicodeString suggested_name = identify_window->getListElement(index);
/* Remove leading and trailing whitespace */
suggested_name.trim();
/* Reject nicknames with embedded whitespace */
i32 pos = suggested_name.indexOf(' ');
if (pos != -1)
{
suggested_name.findAndReplace(' ', '_');
identify_window->modifyListElementText(index, suggested_name);
return false;
}
ui32 str_len = suggested_name.countChar32();
if (str_len == 0) return false; /* no empty nicks! */
if (str_len > 20)
{
/* no overly long nicks either! */
suggested_name.truncate(20);
identify_window->modifyListElementText(index, suggested_name);
return false;
}
/* The string has no whitespace, is at most 20 characters long but does have at least 1 character.
This is an acceptable nickname. */
nickname = suggested_name;
/* Then, check from database what sort of user information is available. */
SP<ConfigurationDatabase> cdb = configuration.lock();
/* If there is no configuraition, just do the standard non-permanent login. */
if (!cdb)
{
clientIdentified();
return true;
}
/* First check if there's room for this user */
/* This is quite inefficient */
ui32 number_of_users = cdb->loadAllUserData().size();
if (number_of_users >= MAX_REGISTERED_USERS)
{
clientIdentified();
return true;
}
SP<User> user = cdb->loadUserData(nickname);
if (!user)
{
/* No user information? Then we ask the user whether they want a permanent
* or non-permanent account. */
identify_window->setTitle("New user - Password");
identify_window->deleteAllListElements();
identify_window->addListElementUTF8("If you want to make this a permanent account, enter your password here.", "dummy", false, false);
identify_window->addListElementUTF8("Otherwise, leave them empty; your user data will not be preserved.", "dummy", false, false);
password1_index = identify_window->addListElementUTF8("", "Password: ", "new_password1", true, true);
identify_window->modifyListElementStars(password1_index, true);
password2_index = identify_window->addListElementUTF8("", "Retype password: ", "new_password2", true, true);
identify_window->modifyListElementStars(password2_index, true);
identify_window->modifyListSelectionIndex(password1_index);
}
else
{
/* Something wrong with this user if this evaluates to true. */
if (user->getPasswordHash() == "")
return true;
/* Normal log-in */
/* Ask for password. */
identify_window->setTitle("Existing user - Password");
identify_window->deleteAllListElements();
password1_index = identify_window->addListElementUTF8("", "Password: ", "password1", true, true);
identify_window->modifyListElementStars(password1_index, true);
identify_window->modifyListSelectionIndex(password1_index);
}
} /* if "nickname" */
else if (select_type == "password1")
{
/* Don't allow the client to check for passwords in shorter than 1 second intervals. */
if (nanoclock() - password_enter_time < 1000000000) return true;
UnicodeString password1 = identify_window->getListElement(password1_index);
SP<ConfigurationDatabase> cdb = configuration.lock();
/* Refuse to log the user in this case, if database does not exist. */
/* (Different from new user handling when database doesn't exist, I think there's a higher chance
* of malicious user impersonating someone if it's allowed here than there). */
if (!cdb)
{
client_socket->close();
return true;
}
SP<User> user = cdb->loadUserData(nickname);
/* The user *should* exist, disconnect the client if it doesn't. */
if (!user)
{
client_socket->close();
return true;
}
password_enter_time = nanoclock();
if (!user->verifyPassword(password1))
{
/* Invalid password! */
identify_window->modifyListElementText(password1_index, "");
return true;
}
this->user = user;
clientIdentified();
return true;
}
else if (select_type == "new_password1")
identify_window->modifyListSelectionIndex(identify_window->getListSelectionIndex()+1);
else if (select_type == "new_password2")
{
/* Check that passwords match. */
UnicodeString password1 = identify_window->getListElement(password1_index);
UnicodeString password2 = identify_window->getListElement(password2_index);
if (password1 != password2)
{
identify_window->modifyListSelectionIndex(password1_index);
identify_window->modifyListElementTextUTF8(password1_index, "");
identify_window->modifyListElementTextUTF8(password2_index, "");
return true;
}
/* Empty passwords? Make non-permanent login. */
if (password1.countChar32() == 0)
{
clientIdentified();
return true;
}
/* User wants to be a permanent user. */
/* FINE! Let's create them and add them to database */
if (!user) user = SP<User>(new User);
SP<ConfigurationDatabase> cdb = configuration.lock();
if (!cdb)
{
/* Oops, no configuration database? Should not happen at this point. */
/* Set safe values for user and just log them in. */
user->setPasswordSalt("");
user->setPasswordHash("");
user->setAdmin(false);
clientIdentified();
return true;
}
unsigned char random_salt[8];
makeRandomBytes(random_salt, 8);
user->setPasswordSalt(bytes_to_hex(data1D((char*) random_salt, 8)));
user->setName(nickname);
user->setAdmin(false);
user->setPassword(password1);
ui32 number_of_users = cdb->loadAllUserData().size();
if (number_of_users >= MAX_REGISTERED_USERS)
{
clientIdentified();
return true;
}
cdb->saveUserData(user);
clientIdentified();
}
return true;
}
bool Client::chatSelectFunction(ui32 index)
{
UnicodeString chat_message = chat_window->getListElement(chat_window_input_index);
if (chat_message.countChar32() == 0) return false;
chat_window->modifyListElementText(chat_window_input_index, "");
chat_window->modifyListSelectionIndex(chat_window_input_index);
char time_c[51];
time_c[50] = 0;
time_t timet = time(0);
#ifdef __WIN32
struct tm* timem = localtime(&timet);;
strftime(time_c, 50, "%H:%M:%S ", timem);
#else
struct tm timem;
localtime_r(&timet, &timem);
strftime(time_c, 50, "%H:%M:%S ", &timem);
#endif
UnicodeString prefix_first = UnicodeString::fromUTF8(time_c);
UnicodeString prefix;
prefix = prefix_first +
UnicodeString::fromUTF8("<") +
nickname +
UnicodeString::fromUTF8("> ");
global_chat->logMessage(prefix + chat_message);
string prefix_utf8, chat_message_utf8;
prefix_utf8 = TO_UTF8(prefix);
chat_message_utf8 = TO_UTF8(chat_message);
LOG(Note, "Global chat: " << prefix_utf8 << chat_message_utf8);
state.lock()->notifyAllClients();
return false;
};
/* Callback for game window input */
void Client::gameInputFunction(const KeyPress &kp)
{
SP<Slot> sp_slot = slot.lock();
if (sp_slot)
{
SP<State> st = state.lock();
if (!st) return;
if (!st->isAllowedPlayer(user, sp_slot)) return;
sp_slot->feedInput(kp);
sp_slot->setLastUser(user);
}
}
/* Used as a callback function for element window input. */
bool Client::chatRestrictFunction(ui32* keycode, ui32* cursor)
{
assert(keycode && cursor);
/* Don't allow cursor to move before 6 characters. */
//if ((*cursor) < 6) { (*cursor) = 6; return false; };
if ((*keycode) == 0) return true;
/* Restrict minimum length to 6 characters. (length of "Chat> ") */
UnicodeString us = chat_window->getListElement(chat_window_input_index);
return true;
}
void Client::updateNicklistWindowForAll()
{
size_t i1, len = clients.size();
for (i1 = 0; i1 < len; ++i1)
{
SP<Client> c = clients[i1].lock();
if (c)
c->updateNicklistWindow();
else
{
clients.erase(clients.begin() + i1);
i1--;
len--;
}
}
}
void Client::updateClientNicklist(std::vector<SP<Client> >* new_clients)
{
assert(new_clients);
clients.clear();
size_t i1, len = new_clients->size();
for (i1 = 0; i1 < len; ++i1)
clients.push_back( (*new_clients)[i1] );
updateNicklistWindow();
}
void Client::updateNicklistWindow()
{
if (!nicklist_window) return;
ui32 nicklist_window_index = nicklist_window->getListSelectionIndex();
nicklist_window->deleteAllListElements();
vector<UnicodeString> nicks;
nicks.reserve(clients.size());
size_t i1, len = clients.size();
for (i1 = 0; i1 < len; ++i1)
{
SP<Client> c = clients[i1].lock();
if (!c)
{
clients.erase(clients.begin() + i1);
--i1;
--len;
continue;
};
UnicodeString us = c->nickname;
if (us.countChar32() == 0) continue;
nicks.push_back(c->nickname);
}
sort(nicks.begin(), nicks.end());
vector<UnicodeString>::iterator i2, nicks_end = nicks.end();
bool found_index = false;
int index = 0;
for (i2 = nicks.begin(); i2 != nicks_end; ++i2)
{
index = nicklist_window->addListElement((*i2), "", true);
if ((ui32) index == nicklist_window_index) found_index = true;
}
if (!found_index)
nicklist_window->modifyListSelectionIndex(index);
state.lock()->notifyClient(self.lock());
}
void Client::gameResizeFunction(ui32 w, ui32 h)
{
SP<State> st = state.lock();
assert(st);
st->notifyClient(self.lock());
}
void Client::clientIdentified()
{
SP<State> st = state.lock();
assert(st);
st->destroyClient(user->getIDRef(), self.lock());
game_window = interface->createInterface2DWindow();
nicklist_window = interface->createInterfaceElementWindow();
chat_window = interface->createInterfaceElementWindow();
chat_window->setHint("chat");
function2<void, ui32, ui32> resize_game_function = boost::bind(&Client::gameResizeFunction, this, _1, _2);
game_window->setResizeCallback(resize_game_function);
/* Set callbacks for chat window */
function2<bool, ui32*, ui32*> bound_function = boost::bind(&Client::chatRestrictFunction, this, _1, _2);
chat_window->setInputCallback(bound_function);
function1<bool, ui32> bound_select_callback = boost::bind(&Client::chatSelectFunction, this, _1);
chat_window->setListCallback(bound_select_callback);
/* And for game window */
function1<void, const KeyPress&> bound_function2 = boost::bind(&Client::gameInputFunction, this, _1);
game_window->setInputCallback(bound_function2);
/* 10x10 is small, and a good default. */
game_window->setMinimumSize(10, 10);
game_window->setTitle("Game");
chat_window_input_index = chat_window->addListElementUTF8("", "Chat> ", "chat", true, true);
chat_window->modifyListSelectionIndex(chat_window_input_index);
chat_window->setTitle("Chat");
config_window = config_interface->getUserWindow();
user->setName(nickname);
config_interface->setUser(user);
identified = true;
nicklist_window->setTitle("Local players");
nicklist_window->setHint("nicklist");
updateNicklistWindowForAll();
identify_window = SP<InterfaceElementWindow>();
state.lock()->notifyClient(self.lock());
char time_c[51];
time_c[50] = 0;
time_t timet = time(0);
#ifdef __WIN32
struct tm* timem = localtime(&timet);
strftime(time_c, 50, "%H:%M:%S ", timem);
#else
struct tm timem;
localtime_r(&timet, &timem);
strftime(time_c, 50, "%H:%M:%S ", &timem);
#endif
stringstream ss;
ss << time_c << " " << TO_UTF8(nickname) << " has connected to the server.";
global_chat->logMessageUTF8(ss.str());
}
void Client::setConfigurationDatabase(WP<ConfigurationDatabase> configuration_database)
{
configuration = configuration_database;
config_interface->setConfigurationDatabase(configuration.lock());
}
bool Client::shouldShutdown() const
{
if (config_interface->shouldShutdown()) return true;
return false;
}