/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see .
*/
/** @file network_server.cpp Server part of the network protocol. */
#ifdef ENABLE_NETWORK
#include "../stdafx.h"
#include "../debug.h"
#include "../strings_func.h"
#include "../date_func.h"
#include "network_admin.h"
#include "network_server.h"
#include "network_udp.h"
#include "network.h"
#include "network_base.h"
#include "../console_func.h"
#include "../company_base.h"
#include "../command_func.h"
#include "../saveload/saveload.h"
#include "../saveload/saveload_filter.h"
#include "../station_base.h"
#include "../genworld.h"
#include "../fileio_func.h"
#include "../company_func.h"
#include "../company_gui.h"
#include "../window_func.h"
#include "../roadveh.h"
#include "../order_backup.h"
#include "../core/pool_func.hpp"
#include "../core/random_func.hpp"
#include "../rev.h"
#include "table/strings.h"
/* This file handles all the server-commands */
DECLARE_POSTFIX_INCREMENT(ClientID)
/** The identifier counter for new clients (is never decreased) */
static ClientID _network_client_id = CLIENT_ID_FIRST;
/** Make very sure the preconditions given in network_type.h are actually followed */
assert_compile(MAX_CLIENT_SLOTS > MAX_CLIENTS);
assert_compile(NetworkClientSocketPool::MAX_SIZE == MAX_CLIENT_SLOTS);
NetworkClientSocketPool _networkclientsocket_pool("NetworkClientSocket");
INSTANTIATE_POOL_METHODS(NetworkClientSocket)
/** Instantiate the listen sockets. */
template SocketList TCPListenHandler::sockets;
/** Writing a savegame directly to a number of packets. */
struct PacketWriter : SaveFilter {
ServerNetworkGameSocketHandler *cs; ///< Socket we are associated with.
Packet *current; ///< The packet we're currently writing to.
size_t total_size; ///< Total size of the compressed savegame.
/**
* Create the packet writer.
* @param cs The socket handler we're making the packets for.
*/
PacketWriter(ServerNetworkGameSocketHandler *cs) : SaveFilter(NULL), cs(cs), current(NULL), total_size(0)
{
this->cs->savegame_mutex = ThreadMutex::New();
}
/** Make sure everything is cleaned up. */
~PacketWriter()
{
/* Prevent double frees. */
if (this->cs != NULL) {
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->BeginCritical();
this->cs->savegame = NULL;
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->EndCritical();
delete this->cs->savegame_mutex;
this->cs->savegame_mutex = NULL;
}
delete this->current;
}
/** Append the current packet to the queue. */
void AppendQueue()
{
if (this->current == NULL) return;
Packet **p = &this->cs->savegame_packets;
while (*p != NULL) {
p = &(*p)->next;
}
*p = this->current;
this->current = NULL;
}
/* virtual */ void Write(byte *buf, size_t size)
{
if (this->cs == NULL) return;
if (this->current == NULL) this->current = new Packet(PACKET_SERVER_MAP_DATA);
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->BeginCritical();
byte *bufe = buf + size;
while (buf != bufe) {
size_t to_write = min(SEND_MTU - this->current->size, bufe - buf);
memcpy(this->current->buffer + this->current->size, buf, to_write);
this->current->size += (PacketSize)to_write;
buf += to_write;
if (this->current->size == SEND_MTU) {
this->AppendQueue();
if (buf != bufe) this->current = new Packet(PACKET_SERVER_MAP_DATA);
}
}
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->EndCritical();
this->total_size += size;
}
/* virtual */ void Finish()
{
if (this->cs == NULL) return;
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->BeginCritical();
/* Make sure the last packet is flushed. */
this->AppendQueue();
/* Add a packet stating that this is the end to the queue. */
this->current = new Packet(PACKET_SERVER_MAP_DONE);
this->AppendQueue();
/* Fast-track the size to the client. */
Packet *p = new Packet(PACKET_SERVER_MAP_SIZE);
p->Send_uint32((uint32)this->total_size);
this->cs->NetworkTCPSocketHandler::SendPacket(p);
if (this->cs->savegame_mutex != NULL) this->cs->savegame_mutex->EndCritical();
}
};
/**
* Create a new socket for the server side of the game connection.
* @param s The socket to connect with.
*/
ServerNetworkGameSocketHandler::ServerNetworkGameSocketHandler(SOCKET s) : NetworkGameSocketHandler(s)
{
this->status = STATUS_INACTIVE;
this->client_id = _network_client_id++;
this->receive_limit = _settings_client.network.bytes_per_frame_burst;
NetworkClientInfo *ci = new NetworkClientInfo(this->client_id);
this->SetInfo(ci);
ci->client_playas = COMPANY_INACTIVE_CLIENT;
ci->join_date = _date;
}
/**
* Clear everything related to this client.
*/
ServerNetworkGameSocketHandler::~ServerNetworkGameSocketHandler()
{
if (_redirect_console_to_client == this->client_id) _redirect_console_to_client = INVALID_CLIENT_ID;
OrderBackup::ResetUser(this->client_id);
if (this->savegame_mutex != NULL) this->savegame_mutex->BeginCritical();
delete this->savegame_packets;
if (this->savegame != NULL) this->savegame->cs = NULL;
if (this->savegame_mutex != NULL) this->savegame_mutex->EndCritical();
delete this->savegame_mutex;
}
Packet *ServerNetworkGameSocketHandler::ReceivePacket()
{
/* Only allow receiving when we have some buffer free; this value
* can go negative, but eventually it will become positive again. */
if (this->receive_limit <= 0) return NULL;
/* We can receive a packet, so try that and if needed account for
* the amount of received data. */
Packet *p = this->NetworkTCPSocketHandler::ReceivePacket();
if (p != NULL) this->receive_limit -= p->size;
return p;
}
void ServerNetworkGameSocketHandler::SendPacket(Packet *packet)
{
if (this->savegame_mutex != NULL) this->savegame_mutex->BeginCritical();
this->NetworkTCPSocketHandler::SendPacket(packet);
if (this->savegame_mutex != NULL) this->savegame_mutex->EndCritical();
}
NetworkRecvStatus ServerNetworkGameSocketHandler::CloseConnection(NetworkRecvStatus status)
{
assert(status != NETWORK_RECV_STATUS_OKAY);
/*
* Sending a message just before leaving the game calls cs->SendPackets.
* This might invoke this function, which means that when we close the
* connection after cs->SendPackets we will close an already closed
* connection. This handles that case gracefully without having to make
* that code any more complex or more aware of the validity of the socket.
*/
if (this->sock == INVALID_SOCKET) return status;
if (status != NETWORK_RECV_STATUS_CONN_LOST && !this->HasClientQuit() && this->status >= STATUS_AUTHORIZED) {
/* We did not receive a leave message from this client... */
char client_name[NETWORK_CLIENT_NAME_LENGTH];
NetworkClientSocket *new_cs;
this->GetClientName(client_name, sizeof(client_name));
NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, STR_NETWORK_ERROR_CLIENT_CONNECTION_LOST);
/* Inform other clients of this... strange leaving ;) */
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status > STATUS_AUTHORIZED && this != new_cs) {
new_cs->SendErrorQuit(this->client_id, NETWORK_ERROR_CONNECTION_LOST);
}
}
}
DEBUG(net, 1, "Closed client connection %d", this->client_id);
/* We just lost one client :( */
if (this->status >= STATUS_AUTHORIZED) _network_game_info.clients_on--;
extern byte _network_clients_connected;
_network_clients_connected--;
SetWindowDirty(WC_CLIENT_LIST, 0);
this->SendPackets(true);
delete this->GetInfo();
delete this;
return status;
}
/**
* Whether an connection is allowed or not at this moment.
* @return true if the connection is allowed.
*/
/* static */ bool ServerNetworkGameSocketHandler::AllowConnection()
{
extern byte _network_clients_connected;
return _network_clients_connected < MAX_CLIENTS && _network_game_info.clients_on < _settings_client.network.max_clients;
}
/** Send the packets for the server sockets. */
/* static */ void ServerNetworkGameSocketHandler::Send()
{
NetworkClientSocket *cs;
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->writable) {
if (cs->SendPackets() && cs->status == STATUS_MAP) {
/* This client is in the middle of a map-send, call the function for that */
cs->SendMap();
}
}
}
}
static void NetworkHandleCommandQueue(NetworkClientSocket *cs);
/***********
* Sending functions
* DEF_SERVER_SEND_COMMAND has parameter: NetworkClientSocket *cs
************/
NetworkRecvStatus ServerNetworkGameSocketHandler::SendClientInfo(NetworkClientInfo *ci)
{
if (ci->client_id != INVALID_CLIENT_ID) {
Packet *p = new Packet(PACKET_SERVER_CLIENT_INFO);
p->Send_uint32(ci->client_id);
p->Send_uint8 (ci->client_playas);
p->Send_string(ci->client_name);
this->SendPacket(p);
}
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendCompanyInfo()
{
/* Fetch the latest version of the stats */
NetworkCompanyStats company_stats[MAX_COMPANIES];
NetworkPopulateCompanyStats(company_stats);
/* Make a list of all clients per company */
char clients[MAX_COMPANIES][NETWORK_CLIENTS_LENGTH];
NetworkClientSocket *csi;
memset(clients, 0, sizeof(clients));
/* Add the local player (if not dedicated) */
const NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
if (ci != NULL && Company::IsValidID(ci->client_playas)) {
strecpy(clients[ci->client_playas], ci->client_name, lastof(clients[ci->client_playas]));
}
FOR_ALL_CLIENT_SOCKETS(csi) {
char client_name[NETWORK_CLIENT_NAME_LENGTH];
((ServerNetworkGameSocketHandler*)csi)->GetClientName(client_name, sizeof(client_name));
ci = csi->GetInfo();
if (ci != NULL && Company::IsValidID(ci->client_playas)) {
if (!StrEmpty(clients[ci->client_playas])) {
strecat(clients[ci->client_playas], ", ", lastof(clients[ci->client_playas]));
}
strecat(clients[ci->client_playas], client_name, lastof(clients[ci->client_playas]));
}
}
/* Now send the data */
Company *company;
Packet *p;
FOR_ALL_COMPANIES(company) {
p = new Packet(PACKET_SERVER_COMPANY_INFO);
p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION);
p->Send_bool (true);
this->SendCompanyInformation(p, company, &company_stats[company->index]);
if (StrEmpty(clients[company->index])) {
p->Send_string("");
} else {
p->Send_string(clients[company->index]);
}
this->SendPacket(p);
}
p = new Packet(PACKET_SERVER_COMPANY_INFO);
p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION);
p->Send_bool (false);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendError(NetworkErrorCode error)
{
char str[100];
Packet *p = new Packet(PACKET_SERVER_ERROR);
p->Send_uint8(error);
this->SendPacket(p);
StringID strid = GetNetworkErrorMsg(error);
GetString(str, strid, lastof(str));
/* Only send when the current client was in game */
if (this->status > STATUS_AUTHORIZED) {
NetworkClientSocket *new_cs;
char client_name[NETWORK_CLIENT_NAME_LENGTH];
this->GetClientName(client_name, sizeof(client_name));
DEBUG(net, 1, "'%s' made an error and has been disconnected. Reason: '%s'", client_name, str);
NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, strid);
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status > STATUS_AUTHORIZED && new_cs != this) {
/* Some errors we filter to a more general error. Clients don't have to know the real
* reason a joining failed. */
if (error == NETWORK_ERROR_NOT_AUTHORIZED || error == NETWORK_ERROR_NOT_EXPECTED || error == NETWORK_ERROR_WRONG_REVISION) {
error = NETWORK_ERROR_ILLEGAL_PACKET;
}
new_cs->SendErrorQuit(this->client_id, error);
}
}
NetworkAdminClientError(this->client_id, error);
} else {
DEBUG(net, 1, "Client %d made an error and has been disconnected. Reason: '%s'", this->client_id, str);
}
/* The client made a mistake, so drop his connection now! */
return this->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendNewGRFCheck()
{
Packet *p = new Packet(PACKET_SERVER_CHECK_NEWGRFS);
const GRFConfig *c;
uint grf_count = 0;
for (c = _grfconfig; c != NULL; c = c->next) {
if (!HasBit(c->flags, GCF_STATIC)) grf_count++;
}
p->Send_uint8 (grf_count);
for (c = _grfconfig; c != NULL; c = c->next) {
if (!HasBit(c->flags, GCF_STATIC)) this->SendGRFIdentifier(p, &c->ident);
}
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendNeedGamePassword()
{
/* Invalid packet when status is STATUS_AUTH_GAME or higher */
if (this->status >= STATUS_AUTH_GAME) return this->CloseConnection(NETWORK_RECV_STATUS_MALFORMED_PACKET);
this->status = STATUS_AUTH_GAME;
Packet *p = new Packet(PACKET_SERVER_NEED_GAME_PASSWORD);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendNeedCompanyPassword()
{
/* Invalid packet when status is STATUS_AUTH_COMPANY or higher */
if (this->status >= STATUS_AUTH_COMPANY) return this->CloseConnection(NETWORK_RECV_STATUS_MALFORMED_PACKET);
this->status = STATUS_AUTH_COMPANY;
Packet *p = new Packet(PACKET_SERVER_NEED_COMPANY_PASSWORD);
p->Send_uint32(_settings_game.game_creation.generation_seed);
p->Send_string(_settings_client.network.network_id);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendWelcome()
{
Packet *p;
NetworkClientSocket *new_cs;
/* Invalid packet when status is AUTH or higher */
if (this->status >= STATUS_AUTHORIZED) return this->CloseConnection(NETWORK_RECV_STATUS_MALFORMED_PACKET);
this->status = STATUS_AUTHORIZED;
_network_game_info.clients_on++;
p = new Packet(PACKET_SERVER_WELCOME);
p->Send_uint32(this->client_id);
p->Send_uint32(_settings_game.game_creation.generation_seed);
p->Send_string(_settings_client.network.network_id);
this->SendPacket(p);
/* Transmit info about all the active clients */
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs != this && new_cs->status > STATUS_AUTHORIZED) {
this->SendClientInfo(new_cs->GetInfo());
}
}
/* Also send the info of the server */
return this->SendClientInfo(NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER));
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendWait()
{
int waiting = 0;
NetworkClientSocket *new_cs;
Packet *p;
/* Count how many clients are waiting in the queue */
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status == STATUS_MAP_WAIT) waiting++;
}
p = new Packet(PACKET_SERVER_WAIT);
p->Send_uint8(waiting);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
/* This sends the map to the client */
NetworkRecvStatus ServerNetworkGameSocketHandler::SendMap()
{
static uint sent_packets; // How many packets we did send succecfully last time
if (this->status < STATUS_AUTHORIZED) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_AUTHORIZED);
}
if (this->status == STATUS_AUTHORIZED) {
this->savegame = new PacketWriter(this);
/* Now send the _frame_counter and how many packets are coming */
Packet *p = new Packet(PACKET_SERVER_MAP_BEGIN);
p->Send_uint32(_frame_counter);
this->SendPacket(p);
NetworkSyncCommandQueue(this);
this->status = STATUS_MAP;
/* Mark the start of download */
this->last_frame = _frame_counter;
this->last_frame_server = _frame_counter;
sent_packets = 4; // We start with trying 4 packets
/* Make a dump of the current game */
if (SaveWithFilter(this->savegame, true) != SL_OK) usererror("network savedump failed");
}
if (this->status == STATUS_MAP) {
if (this->savegame_mutex != NULL) this->savegame_mutex->BeginCritical();
for (uint i = 0; i < sent_packets && this->savegame_packets != NULL; i++) {
Packet *p = this->savegame_packets;
bool last_packet = p->buffer[2] == PACKET_SERVER_MAP_DONE;
/* Remove the packet from the savegame queue and put it in the real queue. */
this->savegame_packets = p->next;
p->next = NULL;
this->NetworkTCPSocketHandler::SendPacket(p);
if (last_packet) {
/* Done reading! */
/* Set the status to DONE_MAP, no we will wait for the client
* to send it is ready (maybe that happens like never ;)) */
this->status = STATUS_DONE_MAP;
NetworkClientSocket *new_cs;
bool new_map_client = false;
/* Check if there is a client waiting for receiving the map
* and start sending him the map */
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status == STATUS_MAP_WAIT) {
/* Check if we already have a new client to send the map to */
if (!new_map_client) {
/* If not, this client will get the map */
new_cs->status = STATUS_AUTHORIZED;
new_map_client = true;
new_cs->SendMap();
} else {
/* Else, send the other clients how many clients are in front of them */
new_cs->SendWait();
}
}
}
/* There is no more data, so break the for */
break;
}
}
/* Send all packets (forced) and check if we have send it all */
if (this->SendPackets() && this->IsPacketQueueEmpty()) {
/* All are sent, increase the sent_packets */
if (this->savegame_packets != NULL) sent_packets *= 2;
} else {
/* Not everything is sent, decrease the sent_packets */
if (sent_packets > 1) sent_packets /= 2;
}
if (this->savegame_mutex != NULL) this->savegame_mutex->EndCritical();
}
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendJoin(ClientID client_id)
{
Packet *p = new Packet(PACKET_SERVER_JOIN);
p->Send_uint32(client_id);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendFrame()
{
Packet *p = new Packet(PACKET_SERVER_FRAME);
p->Send_uint32(_frame_counter);
p->Send_uint32(_frame_counter_max);
#ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME
p->Send_uint32(_sync_seed_1);
#ifdef NETWORK_SEND_DOUBLE_SEED
p->Send_uint32(_sync_seed_2);
#endif
#endif
/* If token equals 0, we need to make a new token and send that. */
if (this->last_token == 0) {
this->last_token = InteractiveRandomRange(UINT8_MAX - 1) + 1;
p->Send_uint8(this->last_token);
}
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendSync()
{
Packet *p = new Packet(PACKET_SERVER_SYNC);
p->Send_uint32(_frame_counter);
p->Send_uint32(_sync_seed_1);
#ifdef NETWORK_SEND_DOUBLE_SEED
p->Send_uint32(_sync_seed_2);
#endif
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendCommand(const CommandPacket *cp)
{
Packet *p = new Packet(PACKET_SERVER_COMMAND);
this->NetworkGameSocketHandler::SendCommand(p, cp);
p->Send_uint32(cp->frame);
p->Send_bool (cp->my_cmd);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendChat(NetworkAction action, ClientID client_id, bool self_send, const char *msg, int64 data)
{
Packet *p = new Packet(PACKET_SERVER_CHAT);
p->Send_uint8 (action);
p->Send_uint32(client_id);
p->Send_bool (self_send);
p->Send_string(msg);
p->Send_uint64(data);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendErrorQuit(ClientID client_id, NetworkErrorCode errorno)
{
Packet *p = new Packet(PACKET_SERVER_ERROR_QUIT);
p->Send_uint32(client_id);
p->Send_uint8 (errorno);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendQuit(ClientID client_id)
{
Packet *p = new Packet(PACKET_SERVER_QUIT);
p->Send_uint32(client_id);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendShutdown()
{
Packet *p = new Packet(PACKET_SERVER_SHUTDOWN);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendNewGame()
{
Packet *p = new Packet(PACKET_SERVER_NEWGAME);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendRConResult(uint16 colour, const char *command)
{
Packet *p = new Packet(PACKET_SERVER_RCON);
p->Send_uint16(colour);
p->Send_string(command);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendMove(ClientID client_id, CompanyID company_id)
{
Packet *p = new Packet(PACKET_SERVER_MOVE);
p->Send_uint32(client_id);
p->Send_uint8(company_id);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendCompanyUpdate()
{
Packet *p = new Packet(PACKET_SERVER_COMPANY_UPDATE);
p->Send_uint16(_network_company_passworded);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
NetworkRecvStatus ServerNetworkGameSocketHandler::SendConfigUpdate()
{
Packet *p = new Packet(PACKET_SERVER_CONFIG_UPDATE);
p->Send_uint8(_settings_client.network.max_companies);
p->Send_uint8(_settings_client.network.max_spectators);
this->SendPacket(p);
return NETWORK_RECV_STATUS_OKAY;
}
/***********
* Receiving functions
* DEF_SERVER_RECEIVE_COMMAND has parameter: NetworkClientSocket *cs, Packet *p
************/
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_COMPANY_INFO)
{
return this->SendCompanyInfo();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_NEWGRFS_CHECKED)
{
if (this->status != STATUS_NEWGRFS_CHECK) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
NetworkClientInfo *ci = this->GetInfo();
/* We now want a password from the client else we do not allow him in! */
if (!StrEmpty(_settings_client.network.server_password)) {
return this->SendNeedGamePassword();
}
if (Company::IsValidID(ci->client_playas) && !StrEmpty(_network_company_states[ci->client_playas].password)) {
return this->SendNeedCompanyPassword();
}
return this->SendWelcome();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_JOIN)
{
if (this->status != STATUS_INACTIVE) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
char name[NETWORK_CLIENT_NAME_LENGTH];
NetworkClientInfo *ci;
CompanyID playas;
NetworkLanguage client_lang;
char client_revision[NETWORK_REVISION_LENGTH];
p->Recv_string(client_revision, sizeof(client_revision));
/* Check if the client has revision control enabled */
if (!IsNetworkCompatibleVersion(client_revision)) {
/* Different revisions!! */
return this->SendError(NETWORK_ERROR_WRONG_REVISION);
}
p->Recv_string(name, sizeof(name));
playas = (Owner)p->Recv_uint8();
client_lang = (NetworkLanguage)p->Recv_uint8();
if (this->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
/* join another company does not affect these values */
switch (playas) {
case COMPANY_NEW_COMPANY: // New company
if (Company::GetNumItems() >= _settings_client.network.max_companies) {
return this->SendError(NETWORK_ERROR_FULL);
}
break;
case COMPANY_SPECTATOR: // Spectator
if (NetworkSpectatorCount() >= _settings_client.network.max_spectators) {
return this->SendError(NETWORK_ERROR_FULL);
}
break;
default: // Join another company (companies 1-8 (index 0-7))
if (!Company::IsValidHumanID(playas)) {
return this->SendError(NETWORK_ERROR_COMPANY_MISMATCH);
}
break;
}
/* We need a valid name.. make it Player */
if (StrEmpty(name)) strecpy(name, "Player", lastof(name));
if (!NetworkFindName(name)) { // Change name if duplicate
/* We could not create a name for this client */
return this->SendError(NETWORK_ERROR_NAME_IN_USE);
}
ci = this->GetInfo();
strecpy(ci->client_name, name, lastof(ci->client_name));
ci->client_playas = playas;
ci->client_lang = client_lang;
DEBUG(desync, 1, "client: %08x; %02x; %02x; %04x", _date, _date_fract, (int)ci->client_playas, ci->index);
/* Make sure companies to which people try to join are not autocleaned */
if (Company::IsValidID(playas)) _network_company_states[playas].months_empty = 0;
this->status = STATUS_NEWGRFS_CHECK;
if (_grfconfig == NULL) {
/* Behave as if we received PACKET_CLIENT_NEWGRFS_CHECKED */
return this->NetworkPacketReceive_PACKET_CLIENT_NEWGRFS_CHECKED_command(NULL);
}
return this->SendNewGRFCheck();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_GAME_PASSWORD)
{
if (this->status != STATUS_AUTH_GAME) {
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
char password[NETWORK_PASSWORD_LENGTH];
p->Recv_string(password, sizeof(password));
/* Check game password. Allow joining if we cleared the password meanwhile */
if (!StrEmpty(_settings_client.network.server_password) &&
strcmp(password, _settings_client.network.server_password) != 0) {
/* Password is invalid */
return this->SendError(NETWORK_ERROR_WRONG_PASSWORD);
}
const NetworkClientInfo *ci = this->GetInfo();
if (Company::IsValidID(ci->client_playas) && !StrEmpty(_network_company_states[ci->client_playas].password)) {
return this->SendNeedCompanyPassword();
}
/* Valid password, allow user */
return this->SendWelcome();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_COMPANY_PASSWORD)
{
if (this->status != STATUS_AUTH_COMPANY) {
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
char password[NETWORK_PASSWORD_LENGTH];
p->Recv_string(password, sizeof(password));
/* Check company password. Allow joining if we cleared the password meanwhile.
* Also, check the company is still valid - client could be moved to spectators
* in the middle of the authorization process */
CompanyID playas = this->GetInfo()->client_playas;
if (Company::IsValidID(playas) && !StrEmpty(_network_company_states[playas].password) &&
strcmp(password, _network_company_states[playas].password) != 0) {
/* Password is invalid */
return this->SendError(NETWORK_ERROR_WRONG_PASSWORD);
}
return this->SendWelcome();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_GETMAP)
{
NetworkClientSocket *new_cs;
/* Do an extra version match. We told the client our version already,
* lets confirm that the client isn't lieing to us.
* But only do it for stable releases because of those we are sure
* that everybody has the same NewGRF version. For trunk and the
* branches we make tarballs of the OpenTTDs compiled from tarball
* will have the lower bits set to 0. As such they would become
* incompatible, which we would like to prevent by this. */
if (HasBit(_openttd_newgrf_version, 19)) {
if (_openttd_newgrf_version != p->Recv_uint32()) {
/* The version we get from the client differs, it must have the
* wrong version. The client must be wrong. */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
} else if (p->size != 3) {
/* We received a packet from a version that claims to be stable.
* That shouldn't happen. The client must be wrong. */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
/* The client was never joined.. so this is impossible, right?
* Ignore the packet, give the client a warning, and close his connection */
if (this->status < STATUS_AUTHORIZED || this->HasClientQuit()) {
return this->SendError(NETWORK_ERROR_NOT_AUTHORIZED);
}
/* Check if someone else is receiving the map */
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status == STATUS_MAP) {
/* Tell the new client to wait */
this->status = STATUS_MAP_WAIT;
return this->SendWait();
}
}
/* We receive a request to upload the map.. give it to the client! */
return this->SendMap();
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_MAP_OK)
{
/* Client has the map, now start syncing */
if (this->status == STATUS_DONE_MAP && !this->HasClientQuit()) {
char client_name[NETWORK_CLIENT_NAME_LENGTH];
NetworkClientSocket *new_cs;
this->GetClientName(client_name, sizeof(client_name));
NetworkTextMessage(NETWORK_ACTION_JOIN, CC_DEFAULT, false, client_name, NULL, this->client_id);
/* Mark the client as pre-active, and wait for an ACK
* so we know he is done loading and in sync with us */
this->status = STATUS_PRE_ACTIVE;
NetworkHandleCommandQueue(this);
this->SendFrame();
this->SendSync();
/* This is the frame the client receives
* we need it later on to make sure the client is not too slow */
this->last_frame = _frame_counter;
this->last_frame_server = _frame_counter;
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status > STATUS_AUTHORIZED) {
new_cs->SendClientInfo(this->GetInfo());
new_cs->SendJoin(this->client_id);
}
}
NetworkAdminClientInfo(this->GetInfo(), true);
/* also update the new client with our max values */
this->SendConfigUpdate();
/* quickly update the syncing client with company details */
return this->SendCompanyUpdate();
}
/* Wrong status for this packet, give a warning to client, and close connection */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
/**
* The client has done a command and wants us to handle it
* @param p the packet in which the command was sent
*/
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_COMMAND)
{
/* The client was never joined.. so this is impossible, right?
* Ignore the packet, give the client a warning, and close his connection */
if (this->status < STATUS_DONE_MAP || this->HasClientQuit()) {
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
if (this->incoming_queue.Count() >= _settings_client.network.max_commands_in_queue) {
return this->SendError(NETWORK_ERROR_TOO_MANY_COMMANDS);
}
CommandPacket cp;
const char *err = this->ReceiveCommand(p, &cp);
if (this->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
NetworkClientInfo *ci = this->GetInfo();
if (err != NULL) {
IConsolePrintF(CC_ERROR, "WARNING: %s from client %d (IP: %s).", err, ci->client_id, GetClientIP(ci));
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
if ((GetCommandFlags(cp.cmd) & CMD_SERVER) && ci->client_id != CLIENT_ID_SERVER) {
IConsolePrintF(CC_ERROR, "WARNING: server only command from: client %d (IP: %s), kicking...", ci->client_id, GetClientIP(ci));
return this->SendError(NETWORK_ERROR_KICKED);
}
if ((GetCommandFlags(cp.cmd) & CMD_SPECTATOR) == 0 && !Company::IsValidID(cp.company) && ci->client_id != CLIENT_ID_SERVER) {
IConsolePrintF(CC_ERROR, "WARNING: spectator issueing command from client %d (IP: %s), kicking...", ci->client_id, GetClientIP(ci));
return this->SendError(NETWORK_ERROR_KICKED);
}
/**
* Only CMD_COMPANY_CTRL is always allowed, for the rest, playas needs
* to match the company in the packet. If it doesn't, the client has done
* something pretty naughty (or a bug), and will be kicked
*/
if (!(cp.cmd == CMD_COMPANY_CTRL && cp.p1 == 0 && ci->client_playas == COMPANY_NEW_COMPANY) && ci->client_playas != cp.company) {
IConsolePrintF(CC_ERROR, "WARNING: client %d (IP: %s) tried to execute a command as company %d, kicking...",
ci->client_playas + 1, GetClientIP(ci), cp.company + 1);
return this->SendError(NETWORK_ERROR_COMPANY_MISMATCH);
}
if (cp.cmd == CMD_COMPANY_CTRL) {
if (cp.p1 != 0 || cp.company != COMPANY_SPECTATOR) {
return this->SendError(NETWORK_ERROR_CHEATER);
}
/* Check if we are full - else it's possible for spectators to send a CMD_COMPANY_CTRL and the company is created regardless of max_companies! */
if (Company::GetNumItems() >= _settings_client.network.max_companies) {
NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_CLIENT, ci->client_id, "cannot create new company, server full", CLIENT_ID_SERVER);
return NETWORK_RECV_STATUS_OKAY;
}
}
if (GetCommandFlags(cp.cmd) & CMD_CLIENT_ID) cp.p2 = this->client_id;
this->incoming_queue.Append(&cp);
return NETWORK_RECV_STATUS_OKAY;
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_ERROR)
{
/* This packets means a client noticed an error and is reporting this
* to us. Display the error and report it to the other clients */
NetworkClientSocket *new_cs;
char str[100];
char client_name[NETWORK_CLIENT_NAME_LENGTH];
NetworkErrorCode errorno = (NetworkErrorCode)p->Recv_uint8();
/* The client was never joined.. thank the client for the packet, but ignore it */
if (this->status < STATUS_DONE_MAP || this->HasClientQuit()) {
return this->CloseConnection(NETWORK_RECV_STATUS_CONN_LOST);
}
this->GetClientName(client_name, sizeof(client_name));
StringID strid = GetNetworkErrorMsg(errorno);
GetString(str, strid, lastof(str));
DEBUG(net, 2, "'%s' reported an error and is closing its connection (%s)", client_name, str);
NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, strid);
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status > STATUS_AUTHORIZED) {
new_cs->SendErrorQuit(this->client_id, errorno);
}
}
NetworkAdminClientError(this->client_id, errorno);
return this->CloseConnection(NETWORK_RECV_STATUS_CONN_LOST);
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_QUIT)
{
/* The client wants to leave. Display this and report it to the other
* clients. */
NetworkClientSocket *new_cs;
char client_name[NETWORK_CLIENT_NAME_LENGTH];
/* The client was never joined.. thank the client for the packet, but ignore it */
if (this->status < STATUS_DONE_MAP || this->HasClientQuit()) {
return this->CloseConnection(NETWORK_RECV_STATUS_CONN_LOST);
}
this->GetClientName(client_name, sizeof(client_name));
NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, STR_NETWORK_MESSAGE_CLIENT_LEAVING);
FOR_ALL_CLIENT_SOCKETS(new_cs) {
if (new_cs->status > STATUS_AUTHORIZED && new_cs != this) {
new_cs->SendQuit(this->client_id);
}
}
NetworkAdminClientQuit(this->client_id);
return this->CloseConnection(NETWORK_RECV_STATUS_CONN_LOST);
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_ACK)
{
if (this->status < STATUS_AUTHORIZED) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_AUTHORIZED);
}
uint32 frame = p->Recv_uint32();
/* The client is trying to catch up with the server */
if (this->status == STATUS_PRE_ACTIVE) {
/* The client is not yet catched up? */
if (frame + DAY_TICKS < _frame_counter) return NETWORK_RECV_STATUS_OKAY;
/* Now he is! Unpause the game */
this->status = STATUS_ACTIVE;
this->last_token_frame = _frame_counter;
/* Execute script for, e.g. MOTD */
IConsoleCmdExec("exec scripts/on_server_connect.scr 0");
}
/* Get, and validate the token. */
uint8 token = p->Recv_uint8();
if (token == this->last_token) {
/* We differentiate between last_token_frame and last_frame so the lag
* test uses the actual lag of the client instead of the lag for getting
* the token back and forth; after all, the token is only sent every
* time we receive a PACKET_CLIENT_ACK, after which we will send a new
* token to the client. If the lag would be one day, then we would not
* be sending the new token soon enough for the new daily scheduled
* PACKET_CLIENT_ACK. This would then register the lag of the client as
* two days, even when it's only a single day. */
this->last_token_frame = _frame_counter;
/* Request a new token. */
this->last_token = 0;
}
/* The client received the frame, make note of it */
this->last_frame = frame;
/* With those 2 values we can calculate the lag realtime */
this->last_frame_server = _frame_counter;
return NETWORK_RECV_STATUS_OKAY;
}
void NetworkServerSendChat(NetworkAction action, DestType desttype, int dest, const char *msg, ClientID from_id, int64 data, bool from_admin)
{
NetworkClientSocket *cs;
const NetworkClientInfo *ci, *ci_own, *ci_to;
switch (desttype) {
case DESTTYPE_CLIENT:
/* Are we sending to the server? */
if ((ClientID)dest == CLIENT_ID_SERVER) {
ci = NetworkFindClientInfoFromClientID(from_id);
/* Display the text locally, and that is it */
if (ci != NULL) {
NetworkTextMessage(action, GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
if (_settings_client.network.server_admin_chat) {
NetworkAdminChat(action, desttype, from_id, msg, data, from_admin);
}
}
} else {
/* Else find the client to send the message to */
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->client_id == (ClientID)dest) {
cs->SendChat(action, from_id, false, msg, data);
break;
}
}
}
/* Display the message locally (so you know you have sent it) */
if (from_id != (ClientID)dest) {
if (from_id == CLIENT_ID_SERVER) {
ci = NetworkFindClientInfoFromClientID(from_id);
ci_to = NetworkFindClientInfoFromClientID((ClientID)dest);
if (ci != NULL && ci_to != NULL) {
NetworkTextMessage(action, GetDrawStringCompanyColour(ci->client_playas), true, ci_to->client_name, msg, data);
}
} else {
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->client_id == from_id) {
cs->SendChat(action, (ClientID)dest, true, msg, data);
break;
}
}
}
}
break;
case DESTTYPE_TEAM: {
/* If this is false, the message is already displayed on the client who sent it. */
bool show_local = true;
/* Find all clients that belong to this company */
ci_to = NULL;
FOR_ALL_CLIENT_SOCKETS(cs) {
ci = cs->GetInfo();
if (ci->client_playas == (CompanyID)dest) {
cs->SendChat(action, from_id, false, msg, data);
if (cs->client_id == from_id) show_local = false;
ci_to = ci; // Remember a client that is in the company for company-name
}
}
/* if the server can read it, let the admin network read it, too. */
if (_local_company == (CompanyID)dest && _settings_client.network.server_admin_chat) {
NetworkAdminChat(action, desttype, from_id, msg, data, from_admin);
}
ci = NetworkFindClientInfoFromClientID(from_id);
ci_own = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
if (ci != NULL && ci_own != NULL && ci_own->client_playas == dest) {
NetworkTextMessage(action, GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
if (from_id == CLIENT_ID_SERVER) show_local = false;
ci_to = ci_own;
}
/* There is no such client */
if (ci_to == NULL) break;
/* Display the message locally (so you know you have sent it) */
if (ci != NULL && show_local) {
if (from_id == CLIENT_ID_SERVER) {
char name[NETWORK_NAME_LENGTH];
StringID str = Company::IsValidID(ci_to->client_playas) ? STR_COMPANY_NAME : STR_NETWORK_SPECTATORS;
SetDParam(0, ci_to->client_playas);
GetString(name, str, lastof(name));
NetworkTextMessage(action, GetDrawStringCompanyColour(ci_own->client_playas), true, name, msg, data);
} else {
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->client_id == from_id) {
cs->SendChat(action, ci_to->client_id, true, msg, data);
}
}
}
}
break;
}
default:
DEBUG(net, 0, "[server] received unknown chat destination type %d. Doing broadcast instead", desttype);
/* FALL THROUGH */
case DESTTYPE_BROADCAST:
FOR_ALL_CLIENT_SOCKETS(cs) {
cs->SendChat(action, from_id, false, msg, data);
}
NetworkAdminChat(action, desttype, from_id, msg, data, from_admin);
ci = NetworkFindClientInfoFromClientID(from_id);
if (ci != NULL) {
NetworkTextMessage(action, GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
}
break;
}
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_CHAT)
{
if (this->status < STATUS_AUTHORIZED) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_AUTHORIZED);
}
NetworkAction action = (NetworkAction)p->Recv_uint8();
DestType desttype = (DestType)p->Recv_uint8();
int dest = p->Recv_uint32();
char msg[NETWORK_CHAT_LENGTH];
p->Recv_string(msg, NETWORK_CHAT_LENGTH);
int64 data = p->Recv_uint64();
NetworkClientInfo *ci = this->GetInfo();
switch (action) {
case NETWORK_ACTION_GIVE_MONEY:
if (!Company::IsValidID(ci->client_playas)) break;
/* FALL THROUGH */
case NETWORK_ACTION_CHAT:
case NETWORK_ACTION_CHAT_CLIENT:
case NETWORK_ACTION_CHAT_COMPANY:
NetworkServerSendChat(action, desttype, dest, msg, this->client_id, data);
break;
default:
IConsolePrintF(CC_ERROR, "WARNING: invalid chat action from client %d (IP: %s).", ci->client_id, GetClientIP(ci));
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
return NETWORK_RECV_STATUS_OKAY;
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_SET_PASSWORD)
{
if (this->status != STATUS_ACTIVE) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
char password[NETWORK_PASSWORD_LENGTH];
const NetworkClientInfo *ci;
p->Recv_string(password, sizeof(password));
ci = this->GetInfo();
if (Company::IsValidID(ci->client_playas)) {
strecpy(_network_company_states[ci->client_playas].password, password, lastof(_network_company_states[ci->client_playas].password));
NetworkServerUpdateCompanyPassworded(ci->client_playas, !StrEmpty(_network_company_states[ci->client_playas].password));
}
return NETWORK_RECV_STATUS_OKAY;
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_SET_NAME)
{
if (this->status != STATUS_ACTIVE) {
/* Illegal call, return error and ignore the packet */
return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
}
char client_name[NETWORK_CLIENT_NAME_LENGTH];
NetworkClientInfo *ci;
p->Recv_string(client_name, sizeof(client_name));
ci = this->GetInfo();
if (this->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
if (ci != NULL) {
/* Display change */
if (NetworkFindName(client_name)) {
NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, client_name);
strecpy(ci->client_name, client_name, lastof(ci->client_name));
NetworkUpdateClientInfo(ci->client_id);
}
}
return NETWORK_RECV_STATUS_OKAY;
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_RCON)
{
if (this->status != STATUS_ACTIVE) return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
char pass[NETWORK_PASSWORD_LENGTH];
char command[NETWORK_RCONCOMMAND_LENGTH];
if (StrEmpty(_settings_client.network.rcon_password)) return NETWORK_RECV_STATUS_OKAY;
p->Recv_string(pass, sizeof(pass));
p->Recv_string(command, sizeof(command));
if (strcmp(pass, _settings_client.network.rcon_password) != 0) {
DEBUG(net, 0, "[rcon] wrong password from client-id %d", this->client_id);
return NETWORK_RECV_STATUS_OKAY;
}
DEBUG(net, 0, "[rcon] client-id %d executed: '%s'", this->client_id, command);
_redirect_console_to_client = this->client_id;
IConsoleCmdExec(command);
_redirect_console_to_client = INVALID_CLIENT_ID;
return NETWORK_RECV_STATUS_OKAY;
}
DEF_GAME_RECEIVE_COMMAND(Server, PACKET_CLIENT_MOVE)
{
if (this->status != STATUS_ACTIVE) return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
CompanyID company_id = (Owner)p->Recv_uint8();
/* Check if the company is valid, we don't allow moving to AI companies */
if (company_id != COMPANY_SPECTATOR && !Company::IsValidHumanID(company_id)) return NETWORK_RECV_STATUS_OKAY;
/* Check if we require a password for this company */
if (company_id != COMPANY_SPECTATOR && !StrEmpty(_network_company_states[company_id].password)) {
/* we need a password from the client - should be in this packet */
char password[NETWORK_PASSWORD_LENGTH];
p->Recv_string(password, sizeof(password));
/* Incorrect password sent, return! */
if (strcmp(password, _network_company_states[company_id].password) != 0) {
DEBUG(net, 2, "[move] wrong password from client-id #%d for company #%d", this->client_id, company_id + 1);
return NETWORK_RECV_STATUS_OKAY;
}
}
/* if we get here we can move the client */
NetworkServerDoMove(this->client_id, company_id);
return NETWORK_RECV_STATUS_OKAY;
}
/**
* Package some generic company information into a packet.
* @param p The packet that will contain the data.
* @param c The company to put the of into the packet.
* @param stats The statistics to put in the packet.
* @param max_len The maximum length of the company name.
*/
void NetworkSocketHandler::SendCompanyInformation(Packet *p, const Company *c, const NetworkCompanyStats *stats, uint max_len)
{
/* Grab the company name */
char company_name[NETWORK_COMPANY_NAME_LENGTH];
SetDParam(0, c->index);
assert(max_len <= lengthof(company_name));
GetString(company_name, STR_COMPANY_NAME, company_name + max_len - 1);
/* Get the income */
Money income = 0;
if (_cur_year - 1 == c->inaugurated_year) {
/* The company is here just 1 year, so display [2], else display[1] */
for (uint i = 0; i < lengthof(c->yearly_expenses[2]); i++) {
income -= c->yearly_expenses[2][i];
}
} else {
for (uint i = 0; i < lengthof(c->yearly_expenses[1]); i++) {
income -= c->yearly_expenses[1][i];
}
}
/* Send the information */
p->Send_uint8 (c->index);
p->Send_string(company_name);
p->Send_uint32(c->inaugurated_year);
p->Send_uint64(c->old_economy[0].company_value);
p->Send_uint64(c->money);
p->Send_uint64(income);
p->Send_uint16(c->old_economy[0].performance_history);
/* Send 1 if there is a passord for the company else send 0 */
p->Send_bool (!StrEmpty(_network_company_states[c->index].password));
for (uint i = 0; i < NETWORK_VEH_END; i++) {
p->Send_uint16(stats->num_vehicle[i]);
}
for (uint i = 0; i < NETWORK_VEH_END; i++) {
p->Send_uint16(stats->num_station[i]);
}
p->Send_bool(c->is_ai);
}
/**
* Populate the company stats.
* @param stats the stats to update
*/
void NetworkPopulateCompanyStats(NetworkCompanyStats *stats)
{
const Vehicle *v;
const Station *s;
memset(stats, 0, sizeof(*stats) * MAX_COMPANIES);
/* Go through all vehicles and count the type of vehicles */
FOR_ALL_VEHICLES(v) {
if (!Company::IsValidID(v->owner) || !v->IsPrimaryVehicle()) continue;
byte type = 0;
switch (v->type) {
case VEH_TRAIN: type = NETWORK_VEH_TRAIN; break;
case VEH_ROAD: type = RoadVehicle::From(v)->IsBus() ? NETWORK_VEH_BUS : NETWORK_VEH_LORRY; break;
case VEH_AIRCRAFT: type = NETWORK_VEH_PLANE; break;
case VEH_SHIP: type = NETWORK_VEH_SHIP; break;
default: continue;
}
stats[v->owner].num_vehicle[type]++;
}
/* Go through all stations and count the types of stations */
FOR_ALL_STATIONS(s) {
if (Company::IsValidID(s->owner)) {
NetworkCompanyStats *npi = &stats[s->owner];
if (s->facilities & FACIL_TRAIN) npi->num_station[NETWORK_VEH_TRAIN]++;
if (s->facilities & FACIL_TRUCK_STOP) npi->num_station[NETWORK_VEH_LORRY]++;
if (s->facilities & FACIL_BUS_STOP) npi->num_station[NETWORK_VEH_BUS]++;
if (s->facilities & FACIL_AIRPORT) npi->num_station[NETWORK_VEH_PLANE]++;
if (s->facilities & FACIL_DOCK) npi->num_station[NETWORK_VEH_SHIP]++;
}
}
}
/* Send a packet to all clients with updated info about this client_id */
void NetworkUpdateClientInfo(ClientID client_id)
{
NetworkClientSocket *cs;
NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
if (ci == NULL) return;
DEBUG(desync, 1, "client: %08x; %02x; %02x; %04x", _date, _date_fract, (int)ci->client_playas, client_id);
FOR_ALL_CLIENT_SOCKETS(cs) {
cs->SendClientInfo(ci);
}
NetworkAdminClientUpdate(ci);
}
/* Check if we want to restart the map */
static void NetworkCheckRestartMap()
{
if (_settings_client.network.restart_game_year != 0 && _cur_year >= _settings_client.network.restart_game_year) {
DEBUG(net, 0, "Auto-restarting map. Year %d reached", _cur_year);
StartNewGameWithoutGUI(GENERATE_NEW_SEED);
}
}
/* Check if the server has autoclean_companies activated
Two things happen:
1) If a company is not protected, it is closed after 1 year (for example)
2) If a company is protected, protection is disabled after 3 years (for example)
(and item 1. happens a year later) */
static void NetworkAutoCleanCompanies()
{
const NetworkClientInfo *ci;
const Company *c;
bool clients_in_company[MAX_COMPANIES];
int vehicles_in_company[MAX_COMPANIES];
if (!_settings_client.network.autoclean_companies) return;
memset(clients_in_company, 0, sizeof(clients_in_company));
/* Detect the active companies */
FOR_ALL_CLIENT_INFOS(ci) {
if (Company::IsValidID(ci->client_playas)) clients_in_company[ci->client_playas] = true;
}
if (!_network_dedicated) {
ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
if (Company::IsValidID(ci->client_playas)) clients_in_company[ci->client_playas] = true;
}
if (_settings_client.network.autoclean_novehicles != 0) {
memset(vehicles_in_company, 0, sizeof(vehicles_in_company));
const Vehicle *v;
FOR_ALL_VEHICLES(v) {
if (!Company::IsValidID(v->owner) || !v->IsPrimaryVehicle()) continue;
vehicles_in_company[v->owner]++;
}
}
/* Go through all the comapnies */
FOR_ALL_COMPANIES(c) {
/* Skip the non-active once */
if (c->is_ai) continue;
if (!clients_in_company[c->index]) {
/* The company is empty for one month more */
_network_company_states[c->index].months_empty++;
/* Is the company empty for autoclean_unprotected-months, and is there no protection? */
if (_settings_client.network.autoclean_unprotected != 0 && _network_company_states[c->index].months_empty > _settings_client.network.autoclean_unprotected && StrEmpty(_network_company_states[c->index].password)) {
/* Shut the company down */
DoCommandP(0, 2 | c->index << 16, 0, CMD_COMPANY_CTRL);
NetworkAdminCompanyRemove(c->index, ADMIN_CRR_AUTOCLEAN);
IConsolePrintF(CC_DEFAULT, "Auto-cleaned company #%d with no password", c->index + 1);
}
/* Is the company empty for autoclean_protected-months, and there is a protection? */
if (_settings_client.network.autoclean_protected != 0 && _network_company_states[c->index].months_empty > _settings_client.network.autoclean_protected && !StrEmpty(_network_company_states[c->index].password)) {
/* Unprotect the company */
_network_company_states[c->index].password[0] = '\0';
IConsolePrintF(CC_DEFAULT, "Auto-removed protection from company #%d", c->index + 1);
_network_company_states[c->index].months_empty = 0;
NetworkServerUpdateCompanyPassworded(c->index, false);
}
/* Is the company empty for autoclean_novehicles-months, and has no vehicles? */
if (_settings_client.network.autoclean_novehicles != 0 && _network_company_states[c->index].months_empty > _settings_client.network.autoclean_novehicles && vehicles_in_company[c->index] == 0) {
/* Shut the company down */
DoCommandP(0, 2 | c->index << 16, 0, CMD_COMPANY_CTRL);
NetworkAdminCompanyRemove(c->index, ADMIN_CRR_AUTOCLEAN);
IConsolePrintF(CC_DEFAULT, "Auto-cleaned company #%d with no vehicles", c->index + 1);
}
} else {
/* It is not empty, reset the date */
_network_company_states[c->index].months_empty = 0;
}
}
}
/* This function changes new_name to a name that is unique (by adding #1 ...)
* and it returns true if that succeeded. */
bool NetworkFindName(char new_name[NETWORK_CLIENT_NAME_LENGTH])
{
bool found_name = false;
uint number = 0;
char original_name[NETWORK_CLIENT_NAME_LENGTH];
/* We use NETWORK_CLIENT_NAME_LENGTH in here, because new_name is really a pointer */
ttd_strlcpy(original_name, new_name, NETWORK_CLIENT_NAME_LENGTH);
while (!found_name) {
const NetworkClientInfo *ci;
found_name = true;
FOR_ALL_CLIENT_INFOS(ci) {
if (strcmp(ci->client_name, new_name) == 0) {
/* Name already in use */
found_name = false;
break;
}
}
/* Check if it is the same as the server-name */
ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
if (ci != NULL) {
if (strcmp(ci->client_name, new_name) == 0) found_name = false; // name already in use
}
if (!found_name) {
/* Try a new name ( #1, #2, and so on) */
/* Something's really wrong when there're more names than clients */
if (number++ > MAX_CLIENTS) break;
snprintf(new_name, NETWORK_CLIENT_NAME_LENGTH, "%s #%d", original_name, number);
}
}
return found_name;
}
/**
* Change the client name of the given client
* @param client_id the client to change the name of
* @param new_name the new name for the client
* @return true iff the name was changed
*/
bool NetworkServerChangeClientName(ClientID client_id, const char *new_name)
{
NetworkClientInfo *ci;
/* Check if the name's already in use */
FOR_ALL_CLIENT_INFOS(ci) {
if (strcmp(ci->client_name, new_name) == 0) return false;
}
ci = NetworkFindClientInfoFromClientID(client_id);
if (ci == NULL) return false;
NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, true, ci->client_name, new_name);
strecpy(ci->client_name, new_name, lastof(ci->client_name));
NetworkUpdateClientInfo(client_id);
return true;
}
/**
* Hash the current company password; used when the server 'company' sets his/her password.
* @param password The password to hash.
*/
void HashCurrentCompanyPassword(const char *password)
{
uint32 password_game_seed;
char password_server_id[NETWORK_SERVER_ID_LENGTH];
password_game_seed = _settings_game.game_creation.generation_seed;
strecpy(password_server_id, _settings_client.network.network_id, lastof(password_server_id));
const char *new_pw = GenerateCompanyPasswordHash(password, password_server_id, password_game_seed);
strecpy(_network_company_states[_local_company].password, new_pw, lastof(_network_company_states[_local_company].password));
if (_network_server) {
NetworkServerUpdateCompanyPassworded(_local_company, !StrEmpty(_network_company_states[_local_company].password));
}
}
/* Handle the local command-queue */
static void NetworkHandleCommandQueue(NetworkClientSocket *cs)
{
CommandPacket *cp;
while ((cp = cs->outgoing_queue.Pop()) != NULL) {
cs->SendCommand(cp);
free(cp);
}
}
/* This is called every tick if this is a _network_server */
void NetworkServer_Tick(bool send_frame)
{
NetworkClientSocket *cs;
#ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
bool send_sync = false;
#endif
#ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
if (_frame_counter >= _last_sync_frame + _settings_client.network.sync_freq) {
_last_sync_frame = _frame_counter;
send_sync = true;
}
#endif
/* Now we are done with the frame, inform the clients that they can
* do their frame! */
FOR_ALL_CLIENT_SOCKETS(cs) {
/* We allow a number of bytes per frame, but only to the burst amount
* to be available for packet receiving at any particular time. */
cs->receive_limit = min(cs->receive_limit + _settings_client.network.bytes_per_frame,
_settings_client.network.bytes_per_frame_burst);
/* Check if the speed of the client is what we can expect from a client */
if (cs->status == NetworkClientSocket::STATUS_ACTIVE) {
/* 1 lag-point per day */
uint lag = NetworkCalculateLag(cs) / DAY_TICKS;
if (lag > 0) {
if (lag > 3) {
/* Client did still not report in after 4 game-day, drop him
* (that is, the 3 of above, + 1 before any lag is counted) */
IConsolePrintF(CC_ERROR, cs->last_packet + 3 * DAY_TICKS * MILLISECONDS_PER_TICK > _realtime_tick ?
/* A packet was received in the last three game days, so the client is likely lagging behind. */
"Client #%d is dropped because the client's game state is more than 4 game-days behind" :
/* No packet was received in the last three game days; sounds like a lost connection. */
"Client #%d is dropped because the client did not respond for more than 4 game-days",
cs->client_id);
cs->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
continue;
}
/* Report once per time we detect the lag, and only when we
* received a packet in the last 2000 milliseconds. If we
* did not receive a packet, then the client is not just
* slow, but the connection is likely severed. Mentioning
* frame_freq is not useful in this case. */
if (cs->lag_test == 0 && cs->last_packet + DAY_TICKS * MILLISECONDS_PER_TICK > _realtime_tick) {
IConsolePrintF(CC_WARNING,"[%d] Client #%d is slow, try increasing [network.]frame_freq to a higher value!", _frame_counter, cs->client_id);
cs->lag_test = 1;
}
} else {
cs->lag_test = 0;
}
if (cs->last_frame_server - cs->last_token_frame >= 5 * DAY_TICKS) {
/* This is a bad client! It didn't send the right token back. */
IConsolePrintF(CC_ERROR, "Client #%d is dropped because it fails to send valid acks", cs->client_id);
cs->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
continue;
}
} else if (cs->status == NetworkClientSocket::STATUS_PRE_ACTIVE) {
uint lag = NetworkCalculateLag(cs);
if (lag > _settings_client.network.max_join_time) {
IConsolePrintF(CC_ERROR,"Client #%d is dropped because it took longer than %d ticks for him to join", cs->client_id, _settings_client.network.max_join_time);
cs->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
continue;
}
} else if (cs->status == NetworkClientSocket::STATUS_INACTIVE) {
uint lag = NetworkCalculateLag(cs);
if (lag > 4 * DAY_TICKS) {
IConsolePrintF(CC_ERROR,"Client #%d is dropped because it took longer than %d ticks to start the joining process", cs->client_id, 4 * DAY_TICKS);
cs->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
continue;
}
}
if (cs->status >= NetworkClientSocket::STATUS_PRE_ACTIVE) {
/* Check if we can send command, and if we have anything in the queue */
NetworkHandleCommandQueue(cs);
/* Send an updated _frame_counter_max to the client */
if (send_frame) cs->SendFrame();
#ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
/* Send a sync-check packet */
if (send_sync) cs->SendSync();
#endif
}
}
/* See if we need to advertise */
NetworkUDPAdvertise();
}
/** Yearly "callback". Called whenever the year changes. */
void NetworkServerYearlyLoop()
{
NetworkCheckRestartMap();
NetworkAdminUpdate(ADMIN_FREQUENCY_ANUALLY);
}
/** Monthly "callback". Called whenever the month changes. */
void NetworkServerMonthlyLoop()
{
NetworkAutoCleanCompanies();
NetworkAdminUpdate(ADMIN_FREQUENCY_MONTHLY);
if ((_cur_month % 3) == 0) NetworkAdminUpdate(ADMIN_FREQUENCY_QUARTERLY);
}
/** Daily "callback". Called whenever the date changes. */
void NetworkServerDailyLoop()
{
NetworkAdminUpdate(ADMIN_FREQUENCY_DAILY);
if ((_date % 7) == 3) NetworkAdminUpdate(ADMIN_FREQUENCY_WEEKLY);
}
const char *GetClientIP(NetworkClientInfo *ci)
{
return ci->client_address.GetHostname();
}
void NetworkServerShowStatusToConsole()
{
static const char * const stat_str[] = {
"inactive",
"checking NewGRFs",
"authorizing (server password)",
"authorizing (company password)",
"authorized",
"waiting",
"loading map",
"map done",
"ready",
"active"
};
assert_compile(lengthof(stat_str) == NetworkClientSocket::STATUS_END);
NetworkClientSocket *cs;
FOR_ALL_CLIENT_SOCKETS(cs) {
uint lag = NetworkCalculateLag(cs);
NetworkClientInfo *ci = cs->GetInfo();
const char *status;
status = (cs->status < (ptrdiff_t)lengthof(stat_str) ? stat_str[cs->status] : "unknown");
IConsolePrintF(CC_INFO, "Client #%1d name: '%s' status: '%s' frame-lag: %3d company: %1d IP: %s",
cs->client_id, ci->client_name, status, lag,
ci->client_playas + (Company::IsValidID(ci->client_playas) ? 1 : 0),
GetClientIP(ci));
}
}
/**
* Send Config Update
*/
void NetworkServerSendConfigUpdate()
{
NetworkClientSocket *cs;
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->status >= NetworkClientSocket::STATUS_PRE_ACTIVE) cs->SendConfigUpdate();
}
}
void NetworkServerUpdateCompanyPassworded(CompanyID company_id, bool passworded)
{
if (NetworkCompanyIsPassworded(company_id) == passworded) return;
SB(_network_company_passworded, company_id, 1, !!passworded);
SetWindowClassesDirty(WC_COMPANY);
NetworkClientSocket *cs;
FOR_ALL_CLIENT_SOCKETS(cs) {
if (cs->status >= NetworkClientSocket::STATUS_PRE_ACTIVE) cs->SendCompanyUpdate();
}
NetworkAdminCompanyUpdate(Company::GetIfValid(company_id));
}
/**
* Handle the tid-bits of moving a client from one company to another.
* @param client_id id of the client we want to move.
* @param company_id id of the company we want to move the client to.
* @return void
*/
void NetworkServerDoMove(ClientID client_id, CompanyID company_id)
{
/* Only allow non-dedicated servers and normal clients to be moved */
if (client_id == CLIENT_ID_SERVER && _network_dedicated) return;
NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
/* No need to waste network resources if the client is in the company already! */
if (ci->client_playas == company_id) return;
ci->client_playas = company_id;
if (client_id == CLIENT_ID_SERVER) {
SetLocalCompany(company_id);
} else {
NetworkClientSocket *cs = NetworkFindClientStateFromClientID(client_id);
/* When the company isn't authorized we can't move them yet. */
if (cs->status < NetworkClientSocket::STATUS_AUTHORIZED) return;
cs->SendMove(client_id, company_id);
}
/* announce the client's move */
NetworkUpdateClientInfo(client_id);
NetworkAction action = (company_id == COMPANY_SPECTATOR) ? NETWORK_ACTION_COMPANY_SPECTATOR : NETWORK_ACTION_COMPANY_JOIN;
NetworkServerSendChat(action, DESTTYPE_BROADCAST, 0, "", client_id, company_id + 1);
}
void NetworkServerSendRcon(ClientID client_id, TextColour colour_code, const char *string)
{
NetworkFindClientStateFromClientID(client_id)->SendRConResult(colour_code, string);
}
static void NetworkServerSendError(ClientID client_id, NetworkErrorCode error)
{
NetworkFindClientStateFromClientID(client_id)->SendError(error);
}
void NetworkServerKickClient(ClientID client_id)
{
if (client_id == CLIENT_ID_SERVER) return;
NetworkServerSendError(client_id, NETWORK_ERROR_KICKED);
}
uint NetworkServerKickOrBanIP(const char *ip, bool ban)
{
/* Add address to ban-list */
if (ban) *_network_ban_list.Append() = strdup(ip);
uint n = 0;
/* There can be multiple clients with the same IP, kick them all */
NetworkClientInfo *ci;
FOR_ALL_CLIENT_INFOS(ci) {
if (ci->client_id == CLIENT_ID_SERVER) continue;
if (ci->client_address.IsInNetmask(const_cast(ip))) {
NetworkServerKickClient(ci->client_id);
n++;
}
}
return n;
}
bool NetworkCompanyHasClients(CompanyID company)
{
const NetworkClientInfo *ci;
FOR_ALL_CLIENT_INFOS(ci) {
if (ci->client_playas == company) return true;
}
return false;
}
/**
* Get the name of the client, if the user did not send it yet, Client # is used.
* @param client_name The variable to write the name to.
* @param size The amount of bytes we can write.
*/
void ServerNetworkGameSocketHandler::GetClientName(char *client_name, size_t size) const
{
const NetworkClientInfo *ci = this->GetInfo();
if (StrEmpty(ci->client_name)) {
snprintf(client_name, size, "Client #%4d", this->client_id);
} else {
ttd_strlcpy(client_name, ci->client_name, size);
}
}
#endif /* ENABLE_NETWORK */