network_client.cpp

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00001 /* $Id: network_client.cpp 19653 2010-04-17 12:00:59Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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 <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifdef ENABLE_NETWORK
00013 
00014 #include "../stdafx.h"
00015 #include "../debug.h"
00016 #include "network_internal.h"
00017 #include "network_gui.h"
00018 #include "../saveload/saveload.h"
00019 #include "../command_func.h"
00020 #include "../console_func.h"
00021 #include "../fileio_func.h"
00022 #include "../3rdparty/md5/md5.h"
00023 #include "../strings_func.h"
00024 #include "../window_func.h"
00025 #include "../company_func.h"
00026 #include "../company_base.h"
00027 #include "../company_gui.h"
00028 #include "../rev.h"
00029 #include "network.h"
00030 #include "network_base.h"
00031 
00032 #include "table/strings.h"
00033 
00034 /* This file handles all the client-commands */
00035 
00036 
00037 /* So we don't make too much typos ;) */
00038 #define MY_CLIENT NetworkClientSocket::Get(0)
00039 
00040 static uint32 last_ack_frame;
00041 
00043 static uint32 _password_game_seed;
00045 static char _password_server_id[NETWORK_SERVER_ID_LENGTH];
00046 
00048 static uint8 _network_server_max_companies;
00050 static uint8 _network_server_max_spectators;
00051 
00053 CompanyID _network_join_as;
00054 
00056 const char *_network_join_server_password = NULL;
00058 const char *_network_join_company_password = NULL;
00059 
00061 assert_compile(NETWORK_SERVER_ID_LENGTH == 16 * 2 + 1);
00062 
00068 static const char *GenerateCompanyPasswordHash(const char *password)
00069 {
00070   if (StrEmpty(password)) return password;
00071 
00072   char salted_password[NETWORK_SERVER_ID_LENGTH];
00073 
00074   memset(salted_password, 0, sizeof(salted_password));
00075   snprintf(salted_password, sizeof(salted_password), "%s", password);
00076   /* Add the game seed and the server's ID as the salt. */
00077   for (uint i = 0; i < NETWORK_SERVER_ID_LENGTH - 1; i++) salted_password[i] ^= _password_server_id[i] ^ (_password_game_seed >> i);
00078 
00079   Md5 checksum;
00080   uint8 digest[16];
00081   static char hashed_password[NETWORK_SERVER_ID_LENGTH];
00082 
00083   /* Generate the MD5 hash */
00084   checksum.Append((const uint8*)salted_password, sizeof(salted_password) - 1);
00085   checksum.Finish(digest);
00086 
00087   for (int di = 0; di < 16; di++) sprintf(hashed_password + di * 2, "%02x", digest[di]);
00088   hashed_password[lengthof(hashed_password) - 1] = '\0';
00089 
00090   return hashed_password;
00091 }
00092 
00096 void HashCurrentCompanyPassword(const char *password)
00097 {
00098   _password_game_seed = _settings_game.game_creation.generation_seed;
00099   strecpy(_password_server_id, _settings_client.network.network_id, lastof(_password_server_id));
00100 
00101   const char *new_pw = GenerateCompanyPasswordHash(password);
00102   strecpy(_network_company_states[_local_company].password, new_pw, lastof(_network_company_states[_local_company].password));
00103 
00104   if (_network_server) {
00105     NetworkServerUpdateCompanyPassworded(_local_company, !StrEmpty(_network_company_states[_local_company].password));
00106   }
00107 }
00108 
00109 
00110 /***********
00111  * Sending functions
00112  *   DEF_CLIENT_SEND_COMMAND has no parameters
00113  ************/
00114 
00115 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_COMPANY_INFO)
00116 {
00117   /*
00118    * Packet: CLIENT_COMPANY_INFO
00119    * Function: Request company-info (in detail)
00120    * Data:
00121    *    <none>
00122    */
00123   Packet *p;
00124   _network_join_status = NETWORK_JOIN_STATUS_GETTING_COMPANY_INFO;
00125   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00126 
00127   p = new Packet(PACKET_CLIENT_COMPANY_INFO);
00128   MY_CLIENT->Send_Packet(p);
00129   return NETWORK_RECV_STATUS_OKAY;
00130 }
00131 
00132 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_JOIN)
00133 {
00134   /*
00135    * Packet: CLIENT_JOIN
00136    * Function: Try to join the server
00137    * Data:
00138    *    String: OpenTTD Revision (norev000 if no revision)
00139    *    String: Client Name (max NETWORK_NAME_LENGTH)
00140    *    uint8:  Play as Company id (1..MAX_COMPANIES)
00141    *    uint8:  Language ID
00142    */
00143 
00144   Packet *p;
00145   _network_join_status = NETWORK_JOIN_STATUS_AUTHORIZING;
00146   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00147 
00148   p = new Packet(PACKET_CLIENT_JOIN);
00149   p->Send_string(_openttd_revision);
00150   p->Send_string(_settings_client.network.client_name); // Client name
00151   p->Send_uint8 (_network_join_as);     // PlayAs
00152   p->Send_uint8 (NETLANG_ANY);          // Language
00153   MY_CLIENT->Send_Packet(p);
00154   return NETWORK_RECV_STATUS_OKAY;
00155 }
00156 
00157 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)
00158 {
00159   /*
00160    * Packet: CLIENT_NEWGRFS_CHECKED
00161    * Function: Tell the server that we have the required GRFs
00162    * Data:
00163    */
00164 
00165   Packet *p = new Packet(PACKET_CLIENT_NEWGRFS_CHECKED);
00166   MY_CLIENT->Send_Packet(p);
00167   return NETWORK_RECV_STATUS_OKAY;
00168 }
00169 
00170 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_GAME_PASSWORD)(const char *password)
00171 {
00172   /*
00173    * Packet: CLIENT_GAME_PASSWORD
00174    * Function: Send a password to the server to authorize
00175    * Data:
00176    *    uint8:  NetworkPasswordType
00177    *    String: Password
00178    */
00179   Packet *p = new Packet(PACKET_CLIENT_GAME_PASSWORD);
00180   p->Send_string(password);
00181   MY_CLIENT->Send_Packet(p);
00182   return NETWORK_RECV_STATUS_OKAY;
00183 }
00184 
00185 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_COMPANY_PASSWORD)(const char *password)
00186 {
00187   /*
00188    * Packet: CLIENT_COMPANY_PASSWORD
00189    * Function: Send a password to the server to authorize
00190    * Data:
00191    *    uint8:  NetworkPasswordType
00192    *    String: Password
00193    */
00194   Packet *p = new Packet(PACKET_CLIENT_COMPANY_PASSWORD);
00195   p->Send_string(GenerateCompanyPasswordHash(password));
00196   MY_CLIENT->Send_Packet(p);
00197   return NETWORK_RECV_STATUS_OKAY;
00198 }
00199 
00200 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_GETMAP)
00201 {
00202   /*
00203    * Packet: CLIENT_GETMAP
00204    * Function: Request the map from the server
00205    * Data:
00206    *    <none>
00207    */
00208 
00209   Packet *p = new Packet(PACKET_CLIENT_GETMAP);
00210   /* Send the OpenTTD version to the server, let it validate it too.
00211    * But only do it for stable releases because of those we are sure
00212    * that everybody has the same NewGRF version. For trunk and the
00213    * branches we make tarballs of the OpenTTDs compiled from tarball
00214    * will have the lower bits set to 0. As such they would become
00215    * incompatible, which we would like to prevent by this. */
00216   if (HasBit(_openttd_newgrf_version, 19)) p->Send_uint32(_openttd_newgrf_version);
00217   MY_CLIENT->Send_Packet(p);
00218   return NETWORK_RECV_STATUS_OKAY;
00219 }
00220 
00221 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_MAP_OK)
00222 {
00223   /*
00224    * Packet: CLIENT_MAP_OK
00225    * Function: Tell the server that we are done receiving/loading the map
00226    * Data:
00227    *    <none>
00228    */
00229 
00230   Packet *p = new Packet(PACKET_CLIENT_MAP_OK);
00231   MY_CLIENT->Send_Packet(p);
00232   return NETWORK_RECV_STATUS_OKAY;
00233 }
00234 
00235 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_ACK)
00236 {
00237   /*
00238    * Packet: CLIENT_ACK
00239    * Function: Tell the server we are done with this frame
00240    * Data:
00241    *    uint32: current FrameCounter of the client
00242    */
00243 
00244   Packet *p = new Packet(PACKET_CLIENT_ACK);
00245 
00246   p->Send_uint32(_frame_counter);
00247   MY_CLIENT->Send_Packet(p);
00248   return NETWORK_RECV_STATUS_OKAY;
00249 }
00250 
00251 /* Send a command packet to the server */
00252 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_COMMAND)(const CommandPacket *cp)
00253 {
00254   /*
00255    * Packet: CLIENT_COMMAND
00256    * Function: Send a DoCommand to the Server
00257    * Data:
00258    *    uint8:  CompanyID (0..MAX_COMPANIES-1)
00259    *    uint32: CommandID (see command.h)
00260    *    uint32: P1 (free variables used in DoCommand)
00261    *    uint32: P2
00262    *    uint32: Tile
00263    *    string: text
00264    *    uint8:  CallBackID
00265    */
00266 
00267   Packet *p = new Packet(PACKET_CLIENT_COMMAND);
00268   MY_CLIENT->Send_Command(p, cp);
00269 
00270   MY_CLIENT->Send_Packet(p);
00271   return NETWORK_RECV_STATUS_OKAY;
00272 }
00273 
00274 /* Send a chat-packet over the network */
00275 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_CHAT)(NetworkAction action, DestType type, int dest, const char *msg, int64 data)
00276 {
00277   /*
00278    * Packet: CLIENT_CHAT
00279    * Function: Send a chat-packet to the serve
00280    * Data:
00281    *    uint8:  ActionID (see network_data.h, NetworkAction)
00282    *    uint8:  Destination Type (see network_data.h, DestType);
00283    *    uint32: Destination CompanyID/Client-identifier
00284    *    String: Message (max NETWORK_CHAT_LENGTH)
00285    *    uint64: Some arbitrary number
00286    */
00287 
00288   Packet *p = new Packet(PACKET_CLIENT_CHAT);
00289 
00290   p->Send_uint8 (action);
00291   p->Send_uint8 (type);
00292   p->Send_uint32(dest);
00293   p->Send_string(msg);
00294   p->Send_uint64(data);
00295 
00296   MY_CLIENT->Send_Packet(p);
00297   return NETWORK_RECV_STATUS_OKAY;
00298 }
00299 
00300 /* Send an error-packet over the network */
00301 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_ERROR)(NetworkErrorCode errorno)
00302 {
00303   /*
00304    * Packet: CLIENT_ERROR
00305    * Function: The client made an error and is quiting the game
00306    * Data:
00307    *    uint8:  ErrorID (see network_data.h, NetworkErrorCode)
00308    */
00309   Packet *p = new Packet(PACKET_CLIENT_ERROR);
00310 
00311   p->Send_uint8(errorno);
00312   MY_CLIENT->Send_Packet(p);
00313   return NETWORK_RECV_STATUS_OKAY;
00314 }
00315 
00316 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_SET_PASSWORD)(const char *password)
00317 {
00318   /*
00319    * Packet: PACKET_CLIENT_SET_PASSWORD
00320    * Function: Set the password for the clients current company
00321    * Data:
00322    *    String: Password
00323    */
00324   Packet *p = new Packet(PACKET_CLIENT_SET_PASSWORD);
00325 
00326   p->Send_string(GenerateCompanyPasswordHash(password));
00327   MY_CLIENT->Send_Packet(p);
00328   return NETWORK_RECV_STATUS_OKAY;
00329 }
00330 
00331 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_SET_NAME)(const char *name)
00332 {
00333   /*
00334    * Packet: PACKET_CLIENT_SET_NAME
00335    * Function: Gives the client a new name
00336    * Data:
00337    *    String: Name
00338    */
00339   Packet *p = new Packet(PACKET_CLIENT_SET_NAME);
00340 
00341   p->Send_string(name);
00342   MY_CLIENT->Send_Packet(p);
00343   return NETWORK_RECV_STATUS_OKAY;
00344 }
00345 
00346 /* Send an quit-packet over the network */
00347 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_QUIT)()
00348 {
00349   /*
00350    * Packet: CLIENT_QUIT
00351    * Function: The client is quiting the game
00352    * Data:
00353    */
00354   Packet *p = new Packet(PACKET_CLIENT_QUIT);
00355 
00356   MY_CLIENT->Send_Packet(p);
00357   return NETWORK_RECV_STATUS_OKAY;
00358 }
00359 
00360 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_RCON)(const char *pass, const char *command)
00361 {
00362   Packet *p = new Packet(PACKET_CLIENT_RCON);
00363   p->Send_string(pass);
00364   p->Send_string(command);
00365   MY_CLIENT->Send_Packet(p);
00366   return NETWORK_RECV_STATUS_OKAY;
00367 }
00368 
00369 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_MOVE)(CompanyID company, const char *pass)
00370 {
00371   Packet *p = new Packet(PACKET_CLIENT_MOVE);
00372   p->Send_uint8(company);
00373   p->Send_string(GenerateCompanyPasswordHash(pass));
00374   MY_CLIENT->Send_Packet(p);
00375   return NETWORK_RECV_STATUS_OKAY;
00376 }
00377 
00378 
00379 /***********
00380  * Receiving functions
00381  *   DEF_CLIENT_RECEIVE_COMMAND has parameter: Packet *p
00382  ************/
00383 
00384 extern bool SafeSaveOrLoad(const char *filename, int mode, GameMode newgm, Subdirectory subdir);
00385 extern StringID _switch_mode_errorstr;
00386 
00387 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_FULL)
00388 {
00389   /* We try to join a server which is full */
00390   _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_FULL;
00391   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00392 
00393   return NETWORK_RECV_STATUS_SERVER_FULL;
00394 }
00395 
00396 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_BANNED)
00397 {
00398   /* We try to join a server where we are banned */
00399   _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_BANNED;
00400   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00401 
00402   return NETWORK_RECV_STATUS_SERVER_BANNED;
00403 }
00404 
00405 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMPANY_INFO)
00406 {
00407   byte company_info_version = p->Recv_uint8();
00408 
00409   if (!MY_CLIENT->HasClientQuit() && company_info_version == NETWORK_COMPANY_INFO_VERSION) {
00410     /* We have received all data... (there are no more packets coming) */
00411     if (!p->Recv_bool()) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00412 
00413     CompanyID current = (Owner)p->Recv_uint8();
00414     if (current >= MAX_COMPANIES) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00415 
00416     NetworkCompanyInfo *company_info = GetLobbyCompanyInfo(current);
00417     if (company_info == NULL) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00418 
00419     p->Recv_string(company_info->company_name, sizeof(company_info->company_name));
00420     company_info->inaugurated_year = p->Recv_uint32();
00421     company_info->company_value    = p->Recv_uint64();
00422     company_info->money            = p->Recv_uint64();
00423     company_info->income           = p->Recv_uint64();
00424     company_info->performance      = p->Recv_uint16();
00425     company_info->use_password     = p->Recv_bool();
00426     for (int i = 0; i < NETWORK_VEHICLE_TYPES; i++)
00427       company_info->num_vehicle[i] = p->Recv_uint16();
00428     for (int i = 0; i < NETWORK_STATION_TYPES; i++)
00429       company_info->num_station[i] = p->Recv_uint16();
00430     company_info->ai               = p->Recv_bool();
00431 
00432     p->Recv_string(company_info->clients, sizeof(company_info->clients));
00433 
00434     SetWindowDirty(WC_NETWORK_WINDOW, 0);
00435 
00436     return NETWORK_RECV_STATUS_OKAY;
00437   }
00438 
00439   return NETWORK_RECV_STATUS_CLOSE_QUERY;
00440 }
00441 
00442 /* This packet contains info about the client (playas and name)
00443  *  as client we save this in NetworkClientInfo, linked via 'client_id'
00444  *  which is always an unique number on a server. */
00445 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CLIENT_INFO)
00446 {
00447   NetworkClientInfo *ci;
00448   ClientID client_id = (ClientID)p->Recv_uint32();
00449   CompanyID playas = (CompanyID)p->Recv_uint8();
00450   char name[NETWORK_NAME_LENGTH];
00451 
00452   p->Recv_string(name, sizeof(name));
00453 
00454   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00455 
00456   if (!Company::IsValidID(playas)) playas = COMPANY_SPECTATOR;
00457 
00458   ci = NetworkFindClientInfoFromClientID(client_id);
00459   if (ci != NULL) {
00460     if (playas == ci->client_playas && strcmp(name, ci->client_name) != 0) {
00461       /* Client name changed, display the change */
00462       NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, name);
00463     } else if (playas != ci->client_playas) {
00464       /* The client changed from client-player..
00465        * Do not display that for now */
00466     }
00467 
00468     /* Make sure we're in the company the server tells us to be in,
00469      * for the rare case that we get moved while joining. */
00470     if (client_id == _network_own_client_id) SetLocalCompany(playas);
00471 
00472     ci->client_playas = playas;
00473     strecpy(ci->client_name, name, lastof(ci->client_name));
00474 
00475     SetWindowDirty(WC_CLIENT_LIST, 0);
00476 
00477     return NETWORK_RECV_STATUS_OKAY;
00478   }
00479 
00480   /* We don't have this client_id yet, find an empty client_id, and put the data there */
00481   ci = new NetworkClientInfo(client_id);
00482   ci->client_playas = playas;
00483   if (client_id == _network_own_client_id) MY_CLIENT->SetInfo(ci);
00484 
00485   strecpy(ci->client_name, name, lastof(ci->client_name));
00486 
00487   SetWindowDirty(WC_CLIENT_LIST, 0);
00488 
00489   return NETWORK_RECV_STATUS_OKAY;
00490 }
00491 
00492 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_ERROR)
00493 {
00494   NetworkErrorCode error = (NetworkErrorCode)p->Recv_uint8();
00495 
00496   switch (error) {
00497     /* We made an error in the protocol, and our connection is closed.... */
00498     case NETWORK_ERROR_NOT_AUTHORIZED:
00499     case NETWORK_ERROR_NOT_EXPECTED:
00500     case NETWORK_ERROR_COMPANY_MISMATCH:
00501       _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_ERROR;
00502       break;
00503     case NETWORK_ERROR_FULL:
00504       _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_FULL;
00505       break;
00506     case NETWORK_ERROR_WRONG_REVISION:
00507       _switch_mode_errorstr = STR_NETWORK_ERROR_WRONG_REVISION;
00508       break;
00509     case NETWORK_ERROR_WRONG_PASSWORD:
00510       _switch_mode_errorstr = STR_NETWORK_ERROR_WRONG_PASSWORD;
00511       break;
00512     case NETWORK_ERROR_KICKED:
00513       _switch_mode_errorstr = STR_NETWORK_ERROR_KICKED;
00514       break;
00515     case NETWORK_ERROR_CHEATER:
00516       _switch_mode_errorstr = STR_NETWORK_ERROR_CHEATER;
00517       break;
00518     default:
00519       _switch_mode_errorstr = STR_NETWORK_ERROR_LOSTCONNECTION;
00520   }
00521 
00522   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00523 
00524   return NETWORK_RECV_STATUS_SERVER_ERROR;
00525 }
00526 
00527 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CHECK_NEWGRFS)
00528 {
00529   uint grf_count = p->Recv_uint8();
00530   NetworkRecvStatus ret = NETWORK_RECV_STATUS_OKAY;
00531 
00532   /* Check all GRFs */
00533   for (; grf_count > 0; grf_count--) {
00534     GRFConfig c;
00535     MY_CLIENT->Recv_GRFIdentifier(p, &c);
00536 
00537     /* Check whether we know this GRF */
00538     const GRFConfig *f = FindGRFConfig(c.grfid, c.md5sum);
00539     if (f == NULL) {
00540       /* We do not know this GRF, bail out of initialization */
00541       char buf[sizeof(c.md5sum) * 2 + 1];
00542       md5sumToString(buf, lastof(buf), c.md5sum);
00543       DEBUG(grf, 0, "NewGRF %08X not found; checksum %s", BSWAP32(c.grfid), buf);
00544       ret = NETWORK_RECV_STATUS_NEWGRF_MISMATCH;
00545     }
00546   }
00547 
00548   if (ret == NETWORK_RECV_STATUS_OKAY) {
00549     /* Start receiving the map */
00550     return SEND_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)();
00551   }
00552 
00553   /* NewGRF mismatch, bail out */
00554   _switch_mode_errorstr = STR_NETWORK_ERROR_NEWGRF_MISMATCH;
00555   return ret;
00556 }
00557 
00558 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEED_GAME_PASSWORD)
00559 {
00560   const char *password = _network_join_server_password;
00561   if (!StrEmpty(password)) {
00562     return SEND_COMMAND(PACKET_CLIENT_GAME_PASSWORD)(password);
00563   }
00564 
00565   ShowNetworkNeedPassword(NETWORK_GAME_PASSWORD);
00566 
00567   return NETWORK_RECV_STATUS_OKAY;
00568 }
00569 
00570 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEED_COMPANY_PASSWORD)
00571 {
00572   _password_game_seed = p->Recv_uint32();
00573   p->Recv_string(_password_server_id, sizeof(_password_server_id));
00574   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00575 
00576   const char *password = _network_join_company_password;
00577   if (!StrEmpty(password)) {
00578     return SEND_COMMAND(PACKET_CLIENT_COMPANY_PASSWORD)(password);
00579   }
00580 
00581   ShowNetworkNeedPassword(NETWORK_COMPANY_PASSWORD);
00582 
00583   return NETWORK_RECV_STATUS_OKAY;
00584 }
00585 
00586 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_WELCOME)
00587 {
00588   _network_own_client_id = (ClientID)p->Recv_uint32();
00589 
00590   /* Initialize the password hash salting variables, even if they were previously. */
00591   _password_game_seed = p->Recv_uint32();
00592   p->Recv_string(_password_server_id, sizeof(_password_server_id));
00593 
00594   /* Start receiving the map */
00595   return SEND_COMMAND(PACKET_CLIENT_GETMAP)();
00596 }
00597 
00598 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_WAIT)
00599 {
00600   _network_join_status = NETWORK_JOIN_STATUS_WAITING;
00601   _network_join_waiting = p->Recv_uint8();
00602   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00603 
00604   /* We are put on hold for receiving the map.. we need GUI for this ;) */
00605   DEBUG(net, 1, "The server is currently busy sending the map to someone else, please wait..." );
00606   DEBUG(net, 1, "There are %d clients in front of you", _network_join_waiting);
00607 
00608   return NETWORK_RECV_STATUS_OKAY;
00609 }
00610 
00611 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_MAP)
00612 {
00613   static FILE *file_pointer;
00614 
00615   byte maptype;
00616 
00617   maptype = p->Recv_uint8();
00618 
00619   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00620 
00621   /* First packet, init some stuff */
00622   if (maptype == MAP_PACKET_START) {
00623     file_pointer = FioFOpenFile("network_client.tmp", "wb", AUTOSAVE_DIR);
00624     if (file_pointer == NULL) {
00625       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00626       return NETWORK_RECV_STATUS_SAVEGAME;
00627     }
00628 
00629     _frame_counter = _frame_counter_server = _frame_counter_max = p->Recv_uint32();
00630 
00631     _network_join_bytes = 0;
00632     _network_join_bytes_total = p->Recv_uint32();
00633 
00634     /* If the network connection has been closed due to loss of connection
00635      * or when _network_join_kbytes_total is 0, the join status window will
00636      * do a division by zero. When the connection is lost, we just return
00637      * that. If kbytes_total is 0, the packet must be malformed as a
00638      * savegame less than 1 kilobyte is practically impossible. */
00639     if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00640     if (_network_join_bytes_total == 0) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00641 
00642     _network_join_status = NETWORK_JOIN_STATUS_DOWNLOADING;
00643     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00644 
00645     /* The first packet does not contain any more data */
00646     return NETWORK_RECV_STATUS_OKAY;
00647   }
00648 
00649   if (maptype == MAP_PACKET_NORMAL) {
00650     /* We are still receiving data, put it to the file */
00651     if (fwrite(p->buffer + p->pos, 1, p->size - p->pos, file_pointer) != (size_t)(p->size - p->pos)) {
00652       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00653       return NETWORK_RECV_STATUS_SAVEGAME;
00654     }
00655 
00656     _network_join_bytes = ftell(file_pointer);
00657     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00658   }
00659 
00660   /* Check if this was the last packet */
00661   if (maptype == MAP_PACKET_END) {
00662     fclose(file_pointer);
00663 
00664     _network_join_status = NETWORK_JOIN_STATUS_PROCESSING;
00665     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00666 
00667     /* The map is done downloading, load it */
00668     if (!SafeSaveOrLoad("network_client.tmp", SL_LOAD, GM_NORMAL, AUTOSAVE_DIR)) {
00669       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00670       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00671       return NETWORK_RECV_STATUS_SAVEGAME;
00672     }
00673     /* If the savegame has successfully loaded, ALL windows have been removed,
00674      * only toolbar/statusbar and gamefield are visible */
00675 
00676     /* Say we received the map and loaded it correctly! */
00677     SEND_COMMAND(PACKET_CLIENT_MAP_OK)();
00678 
00679     /* New company/spectator (invalid company) or company we want to join is not active
00680      * Switch local company to spectator and await the server's judgement */
00681     if (_network_join_as == COMPANY_NEW_COMPANY || !Company::IsValidID(_network_join_as)) {
00682       SetLocalCompany(COMPANY_SPECTATOR);
00683 
00684       if (_network_join_as != COMPANY_SPECTATOR) {
00685         /* We have arrived and ready to start playing; send a command to make a new company;
00686          * the server will give us a client-id and let us in */
00687         _network_join_status = NETWORK_JOIN_STATUS_REGISTERING;
00688         ShowJoinStatusWindow();
00689         NetworkSend_Command(0, 0, 0, CMD_COMPANY_CTRL, NULL, NULL, _local_company);
00690       }
00691     } else {
00692       /* take control over an existing company */
00693       SetLocalCompany(_network_join_as);
00694     }
00695   }
00696 
00697   return NETWORK_RECV_STATUS_OKAY;
00698 }
00699 
00700 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_FRAME)
00701 {
00702   _frame_counter_server = p->Recv_uint32();
00703   _frame_counter_max = p->Recv_uint32();
00704 #ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME
00705   /* Test if the server supports this option
00706    *  and if we are at the frame the server is */
00707   if (p->pos < p->size) {
00708     _sync_frame = _frame_counter_server;
00709     _sync_seed_1 = p->Recv_uint32();
00710 #ifdef NETWORK_SEND_DOUBLE_SEED
00711     _sync_seed_2 = p->Recv_uint32();
00712 #endif
00713   }
00714 #endif
00715   DEBUG(net, 5, "Received FRAME %d", _frame_counter_server);
00716 
00717   /* Let the server know that we received this frame correctly
00718    *  We do this only once per day, to save some bandwidth ;) */
00719   if (!_network_first_time && last_ack_frame < _frame_counter) {
00720     last_ack_frame = _frame_counter + DAY_TICKS;
00721     DEBUG(net, 4, "Sent ACK at %d", _frame_counter);
00722     SEND_COMMAND(PACKET_CLIENT_ACK)();
00723   }
00724 
00725   return NETWORK_RECV_STATUS_OKAY;
00726 }
00727 
00728 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_SYNC)
00729 {
00730   _sync_frame = p->Recv_uint32();
00731   _sync_seed_1 = p->Recv_uint32();
00732 #ifdef NETWORK_SEND_DOUBLE_SEED
00733   _sync_seed_2 = p->Recv_uint32();
00734 #endif
00735 
00736   return NETWORK_RECV_STATUS_OKAY;
00737 }
00738 
00739 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMMAND)
00740 {
00741   CommandPacket cp;
00742   const char *err = MY_CLIENT->Recv_Command(p, &cp);
00743   cp.frame    = p->Recv_uint32();
00744   cp.my_cmd   = p->Recv_bool();
00745   cp.next     = NULL;
00746 
00747   if (err != NULL) {
00748     IConsolePrintF(CC_ERROR, "WARNING: %s from server, dropping...", err);
00749     return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00750   }
00751 
00752   /* The server did send us this command..
00753    *  queue it in our own queue, so we can handle it in the upcoming frame! */
00754   NetworkAddCommandQueue(cp);
00755 
00756   return NETWORK_RECV_STATUS_OKAY;
00757 }
00758 
00759 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CHAT)
00760 {
00761   char name[NETWORK_NAME_LENGTH], msg[NETWORK_CHAT_LENGTH];
00762   const NetworkClientInfo *ci = NULL, *ci_to;
00763 
00764   NetworkAction action = (NetworkAction)p->Recv_uint8();
00765   ClientID client_id = (ClientID)p->Recv_uint32();
00766   bool self_send = p->Recv_bool();
00767   p->Recv_string(msg, NETWORK_CHAT_LENGTH);
00768   int64 data = p->Recv_uint64();
00769 
00770   ci_to = NetworkFindClientInfoFromClientID(client_id);
00771   if (ci_to == NULL) return NETWORK_RECV_STATUS_OKAY;
00772 
00773   /* Did we initiate the action locally? */
00774   if (self_send) {
00775     switch (action) {
00776       case NETWORK_ACTION_CHAT_CLIENT:
00777         /* For speaking to client we need the client-name */
00778         snprintf(name, sizeof(name), "%s", ci_to->client_name);
00779         ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
00780         break;
00781 
00782       /* For speaking to company or giving money, we need the company-name */
00783       case NETWORK_ACTION_GIVE_MONEY:
00784         if (!Company::IsValidID(ci_to->client_playas)) return NETWORK_RECV_STATUS_OKAY;
00785         /* fallthrough */
00786       case NETWORK_ACTION_CHAT_COMPANY: {
00787         StringID str = Company::IsValidID(ci_to->client_playas) ? STR_COMPANY_NAME : STR_NETWORK_SPECTATORS;
00788         SetDParam(0, ci_to->client_playas);
00789 
00790         GetString(name, str, lastof(name));
00791         ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
00792       } break;
00793 
00794       default: return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00795     }
00796   } else {
00797     /* Display message from somebody else */
00798     snprintf(name, sizeof(name), "%s", ci_to->client_name);
00799     ci = ci_to;
00800   }
00801 
00802   if (ci != NULL) {
00803     NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), self_send, name, msg, data);
00804   }
00805   return NETWORK_RECV_STATUS_OKAY;
00806 }
00807 
00808 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_ERROR_QUIT)
00809 {
00810   ClientID client_id = (ClientID)p->Recv_uint32();
00811 
00812   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00813   if (ci != NULL) {
00814     NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, ci->client_name, NULL, GetNetworkErrorMsg((NetworkErrorCode)p->Recv_uint8()));
00815     delete ci;
00816   }
00817 
00818   SetWindowDirty(WC_CLIENT_LIST, 0);
00819 
00820   return NETWORK_RECV_STATUS_OKAY;
00821 }
00822 
00823 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_QUIT)
00824 {
00825   NetworkClientInfo *ci;
00826 
00827   ClientID client_id = (ClientID)p->Recv_uint32();
00828 
00829   ci = NetworkFindClientInfoFromClientID(client_id);
00830   if (ci != NULL) {
00831     NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, ci->client_name, NULL, STR_NETWORK_MESSAGE_CLIENT_LEAVING);
00832     delete ci;
00833   } else {
00834     DEBUG(net, 0, "Unknown client (%d) is leaving the game", client_id);
00835   }
00836 
00837   SetWindowDirty(WC_CLIENT_LIST, 0);
00838 
00839   /* If we come here it means we could not locate the client.. strange :s */
00840   return NETWORK_RECV_STATUS_OKAY;
00841 }
00842 
00843 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_JOIN)
00844 {
00845   ClientID client_id = (ClientID)p->Recv_uint32();
00846 
00847   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00848   if (ci != NULL) {
00849     NetworkTextMessage(NETWORK_ACTION_JOIN, CC_DEFAULT, false, ci->client_name);
00850   }
00851 
00852   SetWindowDirty(WC_CLIENT_LIST, 0);
00853 
00854   return NETWORK_RECV_STATUS_OKAY;
00855 }
00856 
00857 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_SHUTDOWN)
00858 {
00859   _switch_mode_errorstr = STR_NETWORK_MESSAGE_SERVER_SHUTDOWN;
00860 
00861   return NETWORK_RECV_STATUS_SERVER_ERROR;
00862 }
00863 
00864 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEWGAME)
00865 {
00866   /* To trottle the reconnects a bit, every clients waits
00867    *  his _local_company value before reconnecting
00868    * COMPANY_SPECTATOR is currently 255, so to avoid long wait periods
00869    *  set the max to 10. */
00870   _network_reconnect = min(_local_company + 1, 10);
00871   _switch_mode_errorstr = STR_NETWORK_MESSAGE_SERVER_REBOOT;
00872 
00873   return NETWORK_RECV_STATUS_SERVER_ERROR;
00874 }
00875 
00876 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_RCON)
00877 {
00878   char rcon_out[NETWORK_RCONCOMMAND_LENGTH];
00879 
00880   ConsoleColour colour_code = (ConsoleColour)p->Recv_uint16();
00881   p->Recv_string(rcon_out, sizeof(rcon_out));
00882 
00883   IConsolePrint(colour_code, rcon_out);
00884 
00885   return NETWORK_RECV_STATUS_OKAY;
00886 }
00887 
00888 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_MOVE)
00889 {
00890   /* Nothing more in this packet... */
00891   ClientID client_id   = (ClientID)p->Recv_uint32();
00892   CompanyID company_id = (CompanyID)p->Recv_uint8();
00893 
00894   if (client_id == 0) {
00895     /* definitely an invalid client id, debug message and do nothing. */
00896     DEBUG(net, 0, "[move] received invalid client index = 0");
00897     return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00898   }
00899 
00900   const NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00901   /* Just make sure we do not try to use a client_index that does not exist */
00902   if (ci == NULL) return NETWORK_RECV_STATUS_OKAY;
00903 
00904   /* if not valid player, force spectator, else check player exists */
00905   if (!Company::IsValidID(company_id)) company_id = COMPANY_SPECTATOR;
00906 
00907   if (client_id == _network_own_client_id) {
00908     SetLocalCompany(company_id);
00909   }
00910 
00911   return NETWORK_RECV_STATUS_OKAY;
00912 }
00913 
00914 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CONFIG_UPDATE)
00915 {
00916   _network_server_max_companies = p->Recv_uint8();
00917   _network_server_max_spectators = p->Recv_uint8();
00918 
00919   return NETWORK_RECV_STATUS_OKAY;
00920 }
00921 
00922 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMPANY_UPDATE)
00923 {
00924   _network_company_passworded = p->Recv_uint16();
00925   SetWindowClassesDirty(WC_COMPANY);
00926 
00927   return NETWORK_RECV_STATUS_OKAY;
00928 }
00929 
00930 
00931 /* The layout for the receive-functions by the client */
00932 typedef NetworkRecvStatus NetworkClientPacket(Packet *p);
00933 
00934 /* This array matches PacketType. At an incoming
00935  *  packet it is matches against this array
00936  *  and that way the right function to handle that
00937  *  packet is found. */
00938 static NetworkClientPacket * const _network_client_packet[] = {
00939   RECEIVE_COMMAND(PACKET_SERVER_FULL),
00940   RECEIVE_COMMAND(PACKET_SERVER_BANNED),
00941   NULL, // PACKET_CLIENT_JOIN,
00942   RECEIVE_COMMAND(PACKET_SERVER_ERROR),
00943   NULL, // PACKET_CLIENT_COMPANY_INFO,
00944   RECEIVE_COMMAND(PACKET_SERVER_COMPANY_INFO),
00945   RECEIVE_COMMAND(PACKET_SERVER_CLIENT_INFO),
00946   RECEIVE_COMMAND(PACKET_SERVER_NEED_GAME_PASSWORD),
00947   RECEIVE_COMMAND(PACKET_SERVER_NEED_COMPANY_PASSWORD),
00948   NULL, // PACKET_CLIENT_GAME_PASSWORD,
00949   NULL, // PACKET_CLIENT_COMPANY_PASSWORD,
00950   RECEIVE_COMMAND(PACKET_SERVER_WELCOME),
00951   NULL, // PACKET_CLIENT_GETMAP,
00952   RECEIVE_COMMAND(PACKET_SERVER_WAIT),
00953   RECEIVE_COMMAND(PACKET_SERVER_MAP),
00954   NULL, // PACKET_CLIENT_MAP_OK,
00955   RECEIVE_COMMAND(PACKET_SERVER_JOIN),
00956   RECEIVE_COMMAND(PACKET_SERVER_FRAME),
00957   RECEIVE_COMMAND(PACKET_SERVER_SYNC),
00958   NULL, // PACKET_CLIENT_ACK,
00959   NULL, // PACKET_CLIENT_COMMAND,
00960   RECEIVE_COMMAND(PACKET_SERVER_COMMAND),
00961   NULL, // PACKET_CLIENT_CHAT,
00962   RECEIVE_COMMAND(PACKET_SERVER_CHAT),
00963   NULL, // PACKET_CLIENT_SET_PASSWORD,
00964   NULL, // PACKET_CLIENT_SET_NAME,
00965   NULL, // PACKET_CLIENT_QUIT,
00966   NULL, // PACKET_CLIENT_ERROR,
00967   RECEIVE_COMMAND(PACKET_SERVER_QUIT),
00968   RECEIVE_COMMAND(PACKET_SERVER_ERROR_QUIT),
00969   RECEIVE_COMMAND(PACKET_SERVER_SHUTDOWN),
00970   RECEIVE_COMMAND(PACKET_SERVER_NEWGAME),
00971   RECEIVE_COMMAND(PACKET_SERVER_RCON),
00972   NULL, // PACKET_CLIENT_RCON,
00973   RECEIVE_COMMAND(PACKET_SERVER_CHECK_NEWGRFS),
00974   NULL, // PACKET_CLIENT_NEWGRFS_CHECKED,
00975   RECEIVE_COMMAND(PACKET_SERVER_MOVE),
00976   NULL, // PACKET_CLIENT_MOVE
00977   RECEIVE_COMMAND(PACKET_SERVER_COMPANY_UPDATE),
00978   RECEIVE_COMMAND(PACKET_SERVER_CONFIG_UPDATE),
00979 };
00980 
00981 /* If this fails, check the array above with network_data.h */
00982 assert_compile(lengthof(_network_client_packet) == PACKET_END);
00983 
00984 /* Is called after a client is connected to the server */
00985 void NetworkClient_Connected()
00986 {
00987   /* Set the frame-counter to 0 so nothing happens till we are ready */
00988   _frame_counter = 0;
00989   _frame_counter_server = 0;
00990   last_ack_frame = 0;
00991   /* Request the game-info */
00992   SEND_COMMAND(PACKET_CLIENT_JOIN)();
00993 }
00994 
00995 /* Reads the packets from the socket-stream, if available */
00996 NetworkRecvStatus NetworkClient_ReadPackets(NetworkClientSocket *cs)
00997 {
00998   Packet *p;
00999   NetworkRecvStatus res = NETWORK_RECV_STATUS_OKAY;
01000 
01001   while (res == NETWORK_RECV_STATUS_OKAY && (p = cs->Recv_Packet()) != NULL) {
01002     byte type = p->Recv_uint8();
01003     if (type < PACKET_END && _network_client_packet[type] != NULL && !MY_CLIENT->HasClientQuit()) {
01004       res = _network_client_packet[type](p);
01005     } else {
01006       res = NETWORK_RECV_STATUS_MALFORMED_PACKET;
01007       DEBUG(net, 0, "[client] received invalid packet type %d", type);
01008     }
01009 
01010     delete p;
01011   }
01012 
01013   return res;
01014 }
01015 
01016 void NetworkClientSendRcon(const char *password, const char *command)
01017 {
01018   SEND_COMMAND(PACKET_CLIENT_RCON)(password, command);
01019 }
01020 
01027 void NetworkClientRequestMove(CompanyID company_id, const char *pass)
01028 {
01029   SEND_COMMAND(PACKET_CLIENT_MOVE)(company_id, pass);
01030 }
01031 
01032 void NetworkClientsToSpectators(CompanyID cid)
01033 {
01034   /* If our company is changing owner, go to spectators */
01035   if (cid == _local_company) SetLocalCompany(COMPANY_SPECTATOR);
01036 
01037   NetworkClientInfo *ci;
01038   FOR_ALL_CLIENT_INFOS(ci) {
01039     if (ci->client_playas != cid) continue;
01040     NetworkTextMessage(NETWORK_ACTION_COMPANY_SPECTATOR, CC_DEFAULT, false, ci->client_name);
01041     ci->client_playas = COMPANY_SPECTATOR;
01042   }
01043 }
01044 
01045 void NetworkUpdateClientName()
01046 {
01047   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
01048 
01049   if (ci == NULL) return;
01050 
01051   /* Don't change the name if it is the same as the old name */
01052   if (strcmp(ci->client_name, _settings_client.network.client_name) != 0) {
01053     if (!_network_server) {
01054       SEND_COMMAND(PACKET_CLIENT_SET_NAME)(_settings_client.network.client_name);
01055     } else {
01056       if (NetworkFindName(_settings_client.network.client_name)) {
01057         NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, _settings_client.network.client_name);
01058         strecpy(ci->client_name, _settings_client.network.client_name, lastof(ci->client_name));
01059         NetworkUpdateClientInfo(CLIENT_ID_SERVER);
01060       }
01061     }
01062   }
01063 }
01064 
01065 void NetworkClientSendChat(NetworkAction action, DestType type, int dest, const char *msg, int64 data)
01066 {
01067   SEND_COMMAND(PACKET_CLIENT_CHAT)(action, type, dest, msg, data);
01068 }
01069 
01070 static void NetworkClientSetPassword(const char *password)
01071 {
01072   SEND_COMMAND(PACKET_CLIENT_SET_PASSWORD)(password);
01073 }
01074 
01080 bool NetworkClientPreferTeamChat(const NetworkClientInfo *cio)
01081 {
01082   /* Only companies actually playing can speak to team. Eg spectators cannot */
01083   if (!_settings_client.gui.prefer_teamchat || !Company::IsValidID(cio->client_playas)) return false;
01084 
01085   const NetworkClientInfo *ci;
01086   FOR_ALL_CLIENT_INFOS(ci) {
01087     if (ci->client_playas == cio->client_playas && ci != cio) return true;
01088   }
01089 
01090   return false;
01091 }
01092 
01098 const char *NetworkChangeCompanyPassword(const char *password)
01099 {
01100   if (strcmp(password, "*") == 0) password = "";
01101 
01102   if (!_network_server) {
01103     NetworkClientSetPassword(password);
01104   } else {
01105     HashCurrentCompanyPassword(password);
01106   }
01107 
01108   return password;
01109 }
01110 
01115 bool NetworkMaxCompaniesReached()
01116 {
01117   return Company::GetNumItems() >= (_network_server ? _settings_client.network.max_companies : _network_server_max_companies);
01118 }
01119 
01124 bool NetworkMaxSpectatorsReached()
01125 {
01126   return NetworkSpectatorCount() >= (_network_server ? _settings_client.network.max_spectators : _network_server_max_spectators);
01127 }
01128 
01132 void NetworkPrintClients()
01133 {
01134   NetworkClientInfo *ci;
01135   FOR_ALL_CLIENT_INFOS(ci) {
01136     IConsolePrintF(CC_INFO, "Client #%1d  name: '%s'  company: %1d  IP: %s",
01137         ci->client_id,
01138         ci->client_name,
01139         ci->client_playas + (Company::IsValidID(ci->client_playas) ? 1 : 0),
01140         GetClientIP(ci));
01141   }
01142 }
01143 
01144 #endif /* ENABLE_NETWORK */

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