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server.cpp
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server.cpp
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/*
Copyright (C) 2003 - 2014 by David White <dave@whitevine.net>
Part of the Battle for Wesnoth Project http://www.wesnoth.org/
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.
See the COPYING file for more details.
*/
/**
* @file
* Wesnoth-Server, for multiplayer-games.
*/
#include "server.hpp"
#include "../global.hpp"
#include "../config.hpp"
#include "../game_config.hpp"
#include "../log.hpp"
#include "../map.hpp" // gamemap::MAX_PLAYERS
#include "../network.hpp"
#include "../filesystem.hpp"
#include "../multiplayer_error_codes.hpp"
#include "../serialization/parser.hpp"
#include "../serialization/preprocessor.hpp"
#include "../serialization/string_utils.hpp"
#include "../serialization/unicode.hpp"
#include "../util.hpp"
#include "game.hpp"
#include "input_stream.hpp"
#include "metrics.hpp"
#include "player.hpp"
#include "proxy.hpp"
#include "simple_wml.hpp"
#include "ban.hpp"
#include "user_handler.hpp"
#include "sample_user_handler.hpp"
#ifdef HAVE_MYSQLPP
#include "forum_user_handler.hpp"
#endif
#include <boost/bind.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/scoped_array.hpp>
#include <boost/foreach.hpp>
#include <boost/utility.hpp>
#include <algorithm>
#include <cassert>
#include <cerrno>
#include <cstdlib>
#include <iomanip>
#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <vector>
#include <queue>
#include <csignal>
#ifndef _WIN32
#include <sys/times.h>
namespace {
clock_t get_cpu_time(bool active) {
if(!active) {
return 0;
}
struct tms buf;
times(&buf);
return buf.tms_utime + buf.tms_stime;
}
}
#else
// on Windows we don't calculate CPU time
clock_t get_cpu_time(bool /*active*/) {
return 0;
}
#endif
namespace {
bool match_user(std::pair<network::connection, wesnothd::player> pl, const std::string& username, const std::string& ip) {
return pl.second.name() == username && network::ip_address(pl.first) == ip;
}
}
static lg::log_domain log_server("server");
/**
* fatal and directly server related errors/warnings,
* ie not caused by erroneous client data
*/
#define ERR_SERVER LOG_STREAM(err, log_server)
/** clients send wrong/unexpected data */
#define WRN_SERVER LOG_STREAM(warn, log_server)
/** normal events */
#define LOG_SERVER LOG_STREAM(info, log_server)
#define DBG_SERVER LOG_STREAM(debug, log_server)
static lg::log_domain log_config("config");
#define ERR_CONFIG LOG_STREAM(err, log_config)
#define WRN_CONFIG LOG_STREAM(warn, log_config)
//compatibility code for MS compilers
#ifndef SIGHUP
#define SIGHUP 20
#endif
/** @todo FIXME: should define SIGINT here too, but to what? */
static sig_atomic_t config_reload = 0;
#ifndef _MSC_VER
static void reload_config(int signal) {
assert(signal == SIGHUP);
config_reload = 1;
}
#endif
static void exit_sigint(int signal) {
assert(signal == SIGINT);
LOG_SERVER << "SIGINT caught, exiting without cleanup immediately.\n";
exit(128 + SIGINT);
}
static void exit_sigterm(int signal) {
assert(signal == SIGTERM);
LOG_SERVER << "SIGTERM caught, exiting without cleanup immediately.\n";
exit(128 + SIGTERM);
}
namespace {
// we take profiling info on every n requests
int request_sample_frequency = 1;
void send_doc(simple_wml::document& doc, network::connection connection, std::string type = "")
{
if (type.empty())
type = doc.root().first_child().to_string();
try {
simple_wml::string_span s = doc.output_compressed();
network::send_raw_data(s.begin(), s.size(), connection, type);
} catch (simple_wml::error& e) {
WRN_CONFIG << __func__ << ": simple_wml error: " << e.message << std::endl;
}
}
void make_add_diff(const simple_wml::node& src, const char* gamelist,
const char* type,
simple_wml::document& out, int index=-1)
{
if (!out.child("gamelist_diff")) {
out.root().add_child("gamelist_diff");
}
simple_wml::node* top = out.child("gamelist_diff");
if(gamelist) {
top = &top->add_child("change_child");
top->set_attr_int("index", 0);
top = &top->add_child("gamelist");
}
simple_wml::node& insert = top->add_child("insert_child");
const simple_wml::node::child_list& children = src.children(type);
assert(!children.empty());
if(index < 0) {
index = children.size() - 1;
}
assert(index < static_cast<int>(children.size()));
insert.set_attr_int("index", index);
children[index]->copy_into(insert.add_child(type));
}
bool make_delete_diff(const simple_wml::node& src,
const char* gamelist,
const char* type,
const simple_wml::node* remove,
simple_wml::document& out)
{
if (!out.child("gamelist_diff")) {
out.root().add_child("gamelist_diff");
}
simple_wml::node* top = out.child("gamelist_diff");
if(gamelist) {
top = &top->add_child("change_child");
top->set_attr_int("index", 0);
top = &top->add_child("gamelist");
}
const simple_wml::node::child_list& children = src.children(type);
const simple_wml::node::child_list::const_iterator itor =
std::find(children.begin(), children.end(), remove);
if(itor == children.end()) {
return false;
}
const int index = itor - children.begin();
simple_wml::node& del = top->add_child("delete_child");
del.set_attr_int("index", index);
del.add_child(type);
return true;
}
bool make_change_diff(const simple_wml::node& src,
const char* gamelist,
const char* type,
const simple_wml::node* item,
simple_wml::document& out)
{
if (!out.child("gamelist_diff")) {
out.root().add_child("gamelist_diff");
}
simple_wml::node* top = out.child("gamelist_diff");
if(gamelist) {
top = &top->add_child("change_child");
top->set_attr_int("index", 0);
top = &top->add_child("gamelist");
}
const simple_wml::node::child_list& children = src.children(type);
const simple_wml::node::child_list::const_iterator itor =
std::find(children.begin(), children.end(), item);
if(itor == children.end()) {
return false;
}
simple_wml::node& diff = *top;
simple_wml::node& del = diff.add_child("delete_child");
const int index = itor - children.begin();
del.set_attr_int("index", index);
del.add_child(type);
//inserts will be processed first by the client, so insert at index+1,
//and then when the delete is processed we'll slide into the right position
simple_wml::node& insert = diff.add_child("insert_child");
insert.set_attr_int("index", index + 1);
children[index]->copy_into(insert.add_child(type));
return true;
}
std::string player_status(wesnothd::player_map::const_iterator pl) {
std::ostringstream out;
const network::connection_stats& stats = network::get_connection_stats(pl->first);
const int time_connected = stats.time_connected / 1000;
const int seconds = time_connected % 60;
const int minutes = (time_connected / 60) % 60;
const int hours = time_connected / (60 * 60);
out << "'" << pl->second.name() << "' @ " << network::ip_address(pl->first)
<< " connected for " << std::setw(2) << hours << ":" << std::setw(2) << minutes << ":" << std::setw(2) << seconds
<< " sent " << stats.bytes_sent << " bytes, received "
<< stats.bytes_received << " bytes";
return out.str();
}
} // namespace
class fps_limiter {
size_t start_ticks_;
size_t ms_per_frame_;
public:
fps_limiter(size_t ms_per_frame = 20) : start_ticks_(0), ms_per_frame_(ms_per_frame)
{}
void limit() {
size_t current_ticks = SDL_GetTicks();
if (current_ticks - start_ticks_ < ms_per_frame_) {
SDL_Delay(ms_per_frame_ - (current_ticks - start_ticks_));
start_ticks_ += ms_per_frame_;
} else {
start_ticks_ = current_ticks;
}
}
void set_ms_per_frame(size_t ms_per_frame)
{
ms_per_frame_ = ms_per_frame;
}
void set_fps(size_t fps)
{
ms_per_frame_ = 1000 / fps;
}
};
static fps_limiter fps_limit_;
namespace {
const std::string denied_msg = "You're not allowed to execute this command.";
const std::string help_msg = "Available commands are: adminmsg <msg>,"
" ban <mask> <time> <reason>, bans [deleted] [<ipmask>], clones,"
" dul|deny_unregistered_login [yes|no], kick <mask> [<reason>],"
" k[ick]ban <mask> <time> <reason>, help, games, metrics,"
" netstats [all], [lobby]msg <message>, motd [<message>],"
" pm|privatemsg <nickname> <message>, requests, sample, searchlog <mask>,"
" signout, stats, status [<mask>], unban <ipmask>\n"
"Specific strings (those not inbetween <> like the command names)"
" are case insensitive.";
}
server::server(int port, const std::string& config_file, size_t min_threads,
size_t max_threads) :
net_manager_(min_threads, max_threads),
server_(port),
ban_manager_(),
ip_log_(),
failed_logins_(),
user_handler_(NULL),
seeds_(),
players_(),
ghost_players_(),
games_(),
not_logged_in_(),
rooms_(players_),
input_(),
input_path_(),
config_file_(config_file),
cfg_(read_config()),
accepted_versions_(),
redirected_versions_(),
proxy_versions_(),
disallowed_names_(),
admin_passwd_(),
admins_(),
motd_(),
default_max_messages_(0),
default_time_period_(0),
concurrent_connections_(0),
graceful_restart(false),
lan_server_(time(NULL)),
last_user_seen_time_(time(NULL)),
restart_command(),
max_ip_log_size_(0),
uh_name_(),
deny_unregistered_login_(false),
save_replays_(false),
replay_save_path_(),
allow_remote_shutdown_(false),
tor_ip_list_(),
failed_login_limit_(),
failed_login_ban_(),
failed_login_buffer_size_(),
version_query_response_("[version]\n[/version]\n", simple_wml::INIT_COMPRESSED),
login_response_("[mustlogin]\n[/mustlogin]\n", simple_wml::INIT_COMPRESSED),
join_lobby_response_("[join_lobby]\n[/join_lobby]\n", simple_wml::INIT_COMPRESSED),
games_and_users_list_("[gamelist]\n[/gamelist]\n", simple_wml::INIT_STATIC),
metrics_(),
last_ping_(time(NULL)),
last_stats_(last_ping_),
last_uh_clean_(last_ping_),
cmd_handlers_()
{
setup_handlers();
load_config();
ban_manager_.read();
rooms_.read_rooms();
#ifndef _MSC_VER
signal(SIGHUP, reload_config);
#endif
signal(SIGINT, exit_sigint);
signal(SIGTERM, exit_sigterm);
}
void server::setup_handlers()
{
cmd_handlers_["shut_down"] = &server::shut_down_handler;
cmd_handlers_["restart"] = &server::restart_handler;
cmd_handlers_["sample"] = &server::sample_handler;
cmd_handlers_["help"] = &server::help_handler;
cmd_handlers_["stats"] = &server::stats_handler;
cmd_handlers_["metrics"] = &server::metrics_handler;
cmd_handlers_["requests"] = &server::requests_handler;
cmd_handlers_["games"] = &server::games_handler;
cmd_handlers_["wml"] = &server::wml_handler;
cmd_handlers_["netstats"] = &server::netstats_handler;
cmd_handlers_["report"] = &server::adminmsg_handler;
cmd_handlers_["adminmsg"] = &server::adminmsg_handler;
cmd_handlers_["pm"] = &server::pm_handler;
cmd_handlers_["privatemsg"] = &server::pm_handler;
cmd_handlers_["msg"] = &server::msg_handler;
cmd_handlers_["lobbymsg"] = &server::msg_handler;
cmd_handlers_["status"] = &server::status_handler;
cmd_handlers_["clones"] = &server::clones_handler;
cmd_handlers_["bans"] = &server::bans_handler;
cmd_handlers_["ban"] = &server::ban_handler;
cmd_handlers_["unban"] = &server::unban_handler;
cmd_handlers_["ungban"] = &server::ungban_handler;
cmd_handlers_["kick"] = &server::kick_handler;
cmd_handlers_["kickban"] = &server::kickban_handler;
cmd_handlers_["kban"] = &server::kickban_handler;
cmd_handlers_["gban"] = &server::gban_handler;
cmd_handlers_["motd"] = &server::motd_handler;
cmd_handlers_["searchlog"] = &server::searchlog_handler;
cmd_handlers_["sl"] = &server::searchlog_handler;
cmd_handlers_["dul"] = &server::dul_handler;
cmd_handlers_["deny_unregistered_login"] = &server::dul_handler;
}
void server::send_error(network::connection sock, const char* msg, const char* error_code) const
{
simple_wml::document doc;
doc.root().add_child("error").set_attr("message", msg);
if(*error_code != '\0') {
doc.child("error")->set_attr("error_code", error_code);
}
send_doc(doc, sock, "error");
}
void server::send_warning(network::connection sock, const char* msg, const char* warning_code) const
{
simple_wml::document doc;
doc.root().add_child("warning").set_attr("message", msg);
if(*warning_code != '\0') {
doc.child("warning")->set_attr("warning_code", warning_code);
}
send_doc(doc, sock, "warning");
}
void server::send_password_request(network::connection sock, const std::string& msg,
const std::string& user, const char* error_code, bool force_confirmation)
{
std::string salt = user_handler_->create_salt();
std::string pepper = user_handler_->create_pepper(user);
std::string spices = pepper + salt;
if(user_handler_->use_phpbb_encryption() && pepper.empty()) {
send_error(sock, "Even though your nickname is registered on this server you "
"cannot log in due to an error in the hashing algorithm. "
"Logging into your forum account on http://forum.wesnoth.org "
"may fix this problem.");
return;
}
seeds_.insert(std::pair<network::connection, std::string>(sock, salt));
simple_wml::document doc;
simple_wml::node& e = doc.root().add_child("error");
e.set_attr("message", msg.c_str());
e.set_attr("password_request", "yes");
e.set_attr("phpbb_encryption", user_handler_->use_phpbb_encryption() ? "yes" : "no");
e.set_attr("salt", spices.c_str());
e.set_attr("force_confirmation", force_confirmation ? "yes" : "no");
if(*error_code != '\0') {
e.set_attr("error_code", error_code);
}
send_doc(doc, sock, "error");
}
config server::read_config() const {
config configuration;
if (config_file_ == "") return configuration;
try {
filesystem::scoped_istream stream = preprocess_file(config_file_);
read(configuration, *stream);
LOG_SERVER << "Server configuration from file: '" << config_file_
<< "' read.\n";
} catch(config::error& e) {
ERR_CONFIG << "ERROR: Could not read configuration file: '"
<< config_file_ << "': '" << e.message << "'.\n";
}
return configuration;
}
void server::load_config() {
#ifndef FIFODIR
# ifdef _MSC_VER
# pragma message ("No FIFODIR set")
# define FIFODIR "d:/"
# else
# warning "No FIFODIR set"
# ifdef _WIN32
# define FIFODIR "d:/"
# else
# define FIFODIR "/var/run/wesnothd"
# endif
# endif
#endif
const std::string fifo_path = (cfg_["fifo_path"].empty() ? std::string(FIFODIR) + "/socket" : std::string(cfg_["fifo_path"]));
// Reset (replace) the input stream only if the FIFO path changed.
if(fifo_path != input_path_) {
input_.reset(new input_stream(fifo_path));
}
input_path_ = fifo_path;
save_replays_ = cfg_["save_replays"].to_bool();
replay_save_path_ = cfg_["replay_save_path"].str();
tor_ip_list_ = utils::split(cfg_["tor_ip_list_path"].empty() ? "" : filesystem::read_file(cfg_["tor_ip_list_path"]), '\n');
admin_passwd_ = cfg_["passwd"].str();
motd_ = cfg_["motd"].str();
lan_server_ = lexical_cast_default<time_t>(cfg_["lan_server"], 0);
uh_name_ = cfg_["user_handler"].str();
deny_unregistered_login_ = cfg_["deny_unregistered_login"].to_bool();
allow_remote_shutdown_ = cfg_["allow_remote_shutdown"].to_bool();
disallowed_names_.clear();
if (cfg_["disallow_names"] == "") {
disallowed_names_.push_back("*admin*");
disallowed_names_.push_back("*admln*");
disallowed_names_.push_back("*server*");
disallowed_names_.push_back("player");
disallowed_names_.push_back("network");
disallowed_names_.push_back("human");
disallowed_names_.push_back("computer");
disallowed_names_.push_back("ai");
disallowed_names_.push_back("ai?");
} else {
disallowed_names_ = utils::split(cfg_["disallow_names"]);
}
default_max_messages_ = cfg_["max_messages"].to_int(4);
default_time_period_ = cfg_["messages_time_period"].to_int(10);
concurrent_connections_ = cfg_["connections_allowed"].to_int(5);
max_ip_log_size_ = cfg_["max_ip_log_size"].to_int(500);
failed_login_limit_ = cfg_["failed_logins_limit"].to_int(10);
failed_login_ban_ = cfg_["failed_logins_ban"].to_int(3600);
failed_login_buffer_size_ = cfg_["failed_logins_buffer_size"].to_int(500);
// Example config line:
// restart_command="./wesnothd-debug -d -c ~/.wesnoth1.5/server.cfg"
// remember to make new one as a daemon or it will block old one
restart_command = cfg_["restart_command"].str();
fps_limit_.set_ms_per_frame(cfg_["ms_per_frame"].to_int(20));
accepted_versions_.clear();
const std::string& versions = cfg_["versions_accepted"];
if (versions.empty() == false) {
accepted_versions_ = utils::split(versions);
} else {
accepted_versions_.push_back(game_config::version);
accepted_versions_.push_back("test");
}
redirected_versions_.clear();
BOOST_FOREACH(const config &redirect, cfg_.child_range("redirect")) {
BOOST_FOREACH(const std::string &version, utils::split(redirect["version"])) {
redirected_versions_[version] = redirect;
}
}
proxy_versions_.clear();
BOOST_FOREACH(const config &proxy, cfg_.child_range("proxy")) {
BOOST_FOREACH(const std::string &version, utils::split(proxy["version"])) {
proxy_versions_[version] = proxy;
}
}
ban_manager_.load_config(cfg_);
rooms_.load_config(cfg_);
// If there is a [user_handler] tag in the config file
// allow nick registration, otherwise we set user_handler_
// to NULL. Thus we must check user_handler_ for not being
// NULL everytime we want to use it.
user_handler_.reset();
if (const config &user_handler = cfg_.child("user_handler")) {
if(uh_name_ == "sample") {
user_handler_.reset(new suh(user_handler));
}
#ifdef HAVE_MYSQLPP
else if(uh_name_ == "forum" || uh_name_.empty()) {
user_handler_.reset(new fuh(user_handler));
}
#endif
// Initiate the mailer class with the [mail] tag
// from the config file
if (user_handler_) user_handler_->init_mailer(cfg_.child("mail"));
}
}
bool server::ip_exceeds_connection_limit(const std::string& ip) const {
if (concurrent_connections_ == 0) return false;
size_t connections = 0;
for (wesnothd::player_map::const_iterator i = players_.begin(); i != players_.end(); ++i) {
if (network::ip_address(i->first) == ip) {
++connections;
}
}
return connections >= concurrent_connections_;
}
std::string server::is_ip_banned(const std::string& ip) const {
if (!tor_ip_list_.empty()) {
if (find(tor_ip_list_.begin(), tor_ip_list_.end(), ip) != tor_ip_list_.end()) return "TOR IP";
}
return ban_manager_.is_ip_banned(ip);
}
void server::dump_stats(const time_t& now) {
last_stats_ = now;
LOG_SERVER << "Statistics:"
<< "\tnumber_of_games = " << games_.size()
<< "\tnumber_of_users = " << players_.size()
<< "\tlobby_users = " << rooms_.lobby().size() << "\n";
}
void server::clean_user_handler(const time_t& now) {
if(!user_handler_) {
return;
}
last_uh_clean_ = now;
user_handler_->clean_up();
}
void server::run() {
int graceful_counter = 0;
for (int loop = 0;; ++loop) {
// Try to run with 50 FPS all the time
// Server will respond a bit faster under heavy load
fps_limit_.limit();
try {
// We are going to waith 10 seconds before shutting down so users can get out of game.
if (graceful_restart && games_.empty() && ++graceful_counter > 500 )
{
// TODO: We should implement client side autoreconnect.
// Idea:
// server should send [reconnect]host=host,port=number[/reconnect]
// Then client would reconnect to new server automatically.
// This would also allow server to move to new port or address if there is need
process_command("msg All games ended. Shutting down now. Reconnect to the new server instance.", "system");
throw network::error("shut down");
}
if (config_reload == 1) {
cfg_ = read_config();
load_config();
config_reload = 0;
}
// Process commands from the server socket/fifo
std::string admin_cmd;
if (input_ && input_->read_line(admin_cmd)) {
LOG_SERVER << "Admin Command: type: " << admin_cmd << "\n";
const std::string res = process_command(admin_cmd, "*socket*");
// Only mark the response if we fake the issuer (i.e. command comes from IRC or so)
if (admin_cmd.at(0) == '+') {
LOG_SERVER << "[admin_command_response]\n" << res << "\n" << "[/admin_command_response]\n";
} else {
LOG_SERVER << res << "\n";
}
}
time_t now = time(NULL);
if (last_ping_ + network::ping_interval <= now) {
if (lan_server_ && players_.empty() && last_user_seen_time_ + lan_server_ < now)
{
LOG_SERVER << "Lan server has been empty for " << (now - last_user_seen_time_) << " seconds. Shutting down!\n";
// We have to shutdown
graceful_restart = true;
}
// and check if bans have expired
ban_manager_.check_ban_times(now);
// Make sure we log stats every 5 minutes
if (last_stats_ + 5 * 60 <= now) {
dump_stats(now);
if (rooms_.dirty()) rooms_.write_rooms();
}
// Cleaning the user_handler once a day should be more than enough
if (last_uh_clean_ + 60 * 60 * 24 <= now) {
clean_user_handler(now);
}
// Send network stats every hour
static int prev_hour = localtime(&now)->tm_hour;
if (prev_hour != localtime(&now)->tm_hour)
{
prev_hour = localtime(&now)->tm_hour;
LOG_SERVER << network::get_bandwidth_stats();
}
// send a 'ping' to all players to detect ghosts
DBG_SERVER << "Pinging inactive players.\n" ;
std::ostringstream strstr ;
strstr << "ping=\"" << now << "\"" ;
simple_wml::document ping( strstr.str().c_str(),
simple_wml::INIT_COMPRESSED );
simple_wml::string_span s = ping.output_compressed();
BOOST_FOREACH(network::connection sock, ghost_players_) {
if (!lg::debug.dont_log(log_server)) {
wesnothd::player_map::const_iterator i = players_.find(sock);
if (i != players_.end()) {
DBG_SERVER << "Pinging " << i->second.name() << "(" << i->first << ").\n";
} else {
ERR_SERVER << "Player " << sock << " is in ghost_players_ but not in players_." << std::endl;
}
}
network::send_raw_data(s.begin(), s.size(), sock, "ping") ;
}
// Copy new player list on top of ghost_players_ list.
// Only a single thread should be accessing this
// Erase before we copy - speeds inserts
ghost_players_.clear();
BOOST_FOREACH(const wesnothd::player_map::value_type v, players_) {
ghost_players_.insert(v.first);
}
last_ping_ = now;
}
network::process_send_queue();
network::connection sock = network::accept_connection();
if (sock) {
const std::string ip = network::ip_address(sock);
const std::string reason = is_ip_banned(ip);
if (!reason.empty()) {
LOG_SERVER << ip << "\trejected banned user. Reason: " << reason << "\n";
send_error(sock, "You are banned. Reason: " + reason);
network::queue_disconnect(sock);
} else if (ip_exceeds_connection_limit(ip)) {
LOG_SERVER << ip << "\trejected ip due to excessive connections\n";
send_error(sock, "Too many connections from your IP.");
network::queue_disconnect(sock);
} else {
DBG_SERVER << ip << "\tnew connection accepted. (socket: "
<< sock << ")\n";
send_doc(version_query_response_, sock);
}
not_logged_in_.insert(sock);
}
static int sample_counter = 0;
std::vector<char> buf;
network::bandwidth_in_ptr bandwidth_type;
while ((sock = network::receive_data(buf, &bandwidth_type)) != network::null_connection) {
metrics_.service_request();
if(buf.empty()) {
WRN_SERVER << "received empty packet" << std::endl;
continue;
}
const bool sample = request_sample_frequency >= 1 && (sample_counter++ % request_sample_frequency) == 0;
const clock_t before_parsing = get_cpu_time(sample);
char* buf_ptr = new char [buf.size()];
memcpy(buf_ptr, &buf[0], buf.size());
simple_wml::string_span compressed_buf(buf_ptr, buf.size());
boost::scoped_ptr<simple_wml::document> data_ptr;
try {
data_ptr.reset(new simple_wml::document(compressed_buf)); // might throw a simple_wml::error
data_ptr->take_ownership_of_buffer(buf_ptr);
} catch (simple_wml::error& e) {
WRN_CONFIG << "simple_wml error in received data: " << e.message << std::endl;
send_error(sock, "Invalid WML received: " + e.message);
delete [] buf_ptr;
continue;
} catch(...) {
delete [] buf_ptr;
throw;
}
simple_wml::document& data = *data_ptr;
std::vector<char>().swap(buf);
const clock_t after_parsing = get_cpu_time(sample);
process_data(sock, data);
bandwidth_type->set_type(data.root().first_child().to_string());
if(sample) {
const clock_t after_processing = get_cpu_time(sample);
metrics_.record_sample(data.root().first_child(),
after_parsing - before_parsing,
after_processing - after_parsing);
}
}
metrics_.no_requests();
} catch(simple_wml::error& e) {
WRN_CONFIG << "Warning: error in received data: " << e.message << std::endl;
} catch(network::error& e) {
if (e.message == "shut down") {
LOG_SERVER << "Try to disconnect all users...\n";
for (wesnothd::player_map::const_iterator pl = players_.begin();
pl != players_.end(); ++pl)
{
network::disconnect(pl->first);
}
LOG_SERVER << "Shutting server down.\n";
break;
}
if (!e.socket) {
ERR_SERVER << "network error: " << e.message << std::endl;
continue;
}
DBG_SERVER << "socket closed: " << e.message << "\n";
const std::string ip = network::ip_address(e.socket);
if (proxy::is_proxy(e.socket)) {
LOG_SERVER << ip << "\tProxy user disconnected.\n";
proxy::disconnect(e.socket);
e.disconnect();
DBG_SERVER << "done closing socket...\n";
continue;
}
// Was the user already logged in?
const wesnothd::player_map::iterator pl_it = players_.find(e.socket);
if (pl_it == players_.end()) {
std::set<network::connection>::iterator i = not_logged_in_.find(e.socket);
if (i != not_logged_in_.end()) {
DBG_SERVER << ip << "\tNot logged in user disconnected.\n";
not_logged_in_.erase(i);
} else {
WRN_SERVER << ip << "\tWarning: User disconnected right after the connection was accepted." << std::endl;
}
e.disconnect();
DBG_SERVER << "done closing socket...\n";
continue;
}
const simple_wml::node::child_list& users = games_and_users_list_.root().children("user");
const size_t index = std::find(users.begin(), users.end(), pl_it->second.config_address()) - users.begin();
if (index < users.size()) {
simple_wml::document diff;
if(make_delete_diff(games_and_users_list_.root(), NULL, "user",
pl_it->second.config_address(), diff)) {
rooms_.lobby().send_data(diff, e.socket);
}
games_and_users_list_.root().remove_child("user", index);
} else {
ERR_SERVER << ip << "ERROR: Could not find user to remove: "
<< pl_it->second.name() << " in games_and_users_list_.\n";
}
// Was the player in the lobby or a game?
if (rooms_.in_lobby(e.socket)) {
rooms_.remove_player(e.socket);
LOG_SERVER << ip << "\t" << pl_it->second.name()
<< "\thas logged off. (socket: " << e.socket << ")\n";
} else {
for (std::vector<wesnothd::game*>::iterator g = games_.begin();
g != games_.end(); ++g)
{
if (!(*g)->is_member(e.socket)) {
continue;
}
// Did the last player leave?
if ((*g)->remove_player(e.socket, true)) {
delete_game(g);
break;
} else {
(*g)->describe_slots();
update_game_in_lobby(*g, e.socket);
}
break;
}
}
// Find the matching nick-ip pair in the log and update the sign off time
connection_log ip_name = connection_log(pl_it->second.name(), ip, 0);
std::deque<connection_log>::iterator i = std::find(ip_log_.begin(), ip_log_.end(), ip_name);
if(i != ip_log_.end()) {
i->log_off = time(NULL);
}
players_.erase(pl_it);
ghost_players_.erase(e.socket);
if (lan_server_)
{
last_user_seen_time_ = time(0);
}
e.disconnect();
DBG_SERVER << "done closing socket...\n";
// Catch user_handler exceptions here, to prevent the
// server from going down completely. Once we are sure
// all user_handler exceptions are caught correctly
// this can removed.
} catch (user_handler::error& e) {
ERR_SERVER << "Uncaught user_handler exception: " << e.message << std::endl;
}
}
}
void server::process_data(const network::connection sock,
simple_wml::document& data) {
if (proxy::is_proxy(sock)) {
proxy::received_data(sock, data);
return;
}
// We know the client is alive for this interval
// Remove player from ghost_players map if selective_ping
// is enabled for the player.
if (ghost_players_.find(sock) != ghost_players_.end()) {
const wesnothd::player_map::const_iterator pl = players_.find(sock);
if (pl != players_.end()) {
if (pl->second.selective_ping() ) {
ghost_players_.erase(sock);
}
}
}
// Process the message
simple_wml::node& root = data.root();
if(root.has_attr("ping")) {
// Ignore client side pings for now.
return;
} else if(not_logged_in_.find(sock) != not_logged_in_.end()) {
// Someone who is not yet logged in is sending login details.
process_login(sock, data);
} else if (simple_wml::node* query = root.child("query")) {
process_query(sock, *query);
} else if (simple_wml::node* nickserv = root.child("nickserv")) {
process_nickserv(sock, *nickserv);
} else if (simple_wml::node* whisper = root.child("whisper")) {
process_whisper(sock, *whisper);
} else if (rooms_.in_lobby(sock)) {
process_data_lobby(sock, data);
} else {
process_data_game(sock, data);
}
}
void server::process_login(const network::connection sock,
simple_wml::document& data) {
// See if the client is sending their version number.
if (const simple_wml::node* const version = data.child("version")) {
const simple_wml::string_span& version_str_span = (*version)["version"];
const std::string version_str(version_str_span.begin(),
version_str_span.end());
std::vector<std::string>::const_iterator accepted_it;
// Check if it is an accepted version.
for (accepted_it = accepted_versions_.begin();
accepted_it != accepted_versions_.end(); ++accepted_it) {
if (utils::wildcard_string_match(version_str, *accepted_it)) break;
}
if (accepted_it != accepted_versions_.end()) {
LOG_SERVER << network::ip_address(sock)
<< "\tplayer joined using accepted version " << version_str
<< ":\ttelling them to log in.\n";
send_doc(login_response_, sock);
return;
}
std::map<std::string, config>::const_iterator config_it;
// Check if it is a redirected version
for (config_it = redirected_versions_.begin();
config_it != redirected_versions_.end(); ++config_it)
{
if (utils::wildcard_string_match(version_str, config_it->first))
break;
}
if (config_it != redirected_versions_.end()) {
LOG_SERVER << network::ip_address(sock)
<< "\tplayer joined using version " << version_str
<< ":\tredirecting them to " << config_it->second["host"]
<< ":" << config_it->second["port"] << "\n";
config response;
response.add_child("redirect", config_it->second);
network::send_data(response, sock, "redirect");
return;
}
// Check if it's a version we should start a proxy for.
for (config_it = proxy_versions_.begin();
config_it != proxy_versions_.end(); ++config_it)
{
if (utils::wildcard_string_match(version_str, config_it->first))