network_client.cpp

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00001 /* $Id: network_client.cpp 21183 2010-11-14 12:22:01Z 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 static FILE *_network_client_download_file = NULL; 
00037 
00038 /* So we don't make too much typos ;) */
00039 #define MY_CLIENT NetworkClientSocket::Get(0)
00040 
00041 static uint32 last_ack_frame;
00042 
00044 static uint32 _password_game_seed;
00046 static char _password_server_id[NETWORK_SERVER_ID_LENGTH];
00047 
00049 static uint8 _network_server_max_companies;
00051 static uint8 _network_server_max_spectators;
00052 
00054 CompanyID _network_join_as;
00055 
00057 const char *_network_join_server_password = NULL;
00059 const char *_network_join_company_password = NULL;
00060 
00062 assert_compile(NETWORK_SERVER_ID_LENGTH == 16 * 2 + 1);
00063 
00069 static const char *GenerateCompanyPasswordHash(const char *password)
00070 {
00071   if (StrEmpty(password)) return password;
00072 
00073   char salted_password[NETWORK_SERVER_ID_LENGTH];
00074 
00075   memset(salted_password, 0, sizeof(salted_password));
00076   snprintf(salted_password, sizeof(salted_password), "%s", password);
00077   /* Add the game seed and the server's ID as the salt. */
00078   for (uint i = 0; i < NETWORK_SERVER_ID_LENGTH - 1; i++) salted_password[i] ^= _password_server_id[i] ^ (_password_game_seed >> i);
00079 
00080   Md5 checksum;
00081   uint8 digest[16];
00082   static char hashed_password[NETWORK_SERVER_ID_LENGTH];
00083 
00084   /* Generate the MD5 hash */
00085   checksum.Append((const uint8*)salted_password, sizeof(salted_password) - 1);
00086   checksum.Finish(digest);
00087 
00088   for (int di = 0; di < 16; di++) sprintf(hashed_password + di * 2, "%02x", digest[di]);
00089   hashed_password[lengthof(hashed_password) - 1] = '\0';
00090 
00091   return hashed_password;
00092 }
00093 
00097 void HashCurrentCompanyPassword(const char *password)
00098 {
00099   _password_game_seed = _settings_game.game_creation.generation_seed;
00100   strecpy(_password_server_id, _settings_client.network.network_id, lastof(_password_server_id));
00101 
00102   const char *new_pw = GenerateCompanyPasswordHash(password);
00103   strecpy(_network_company_states[_local_company].password, new_pw, lastof(_network_company_states[_local_company].password));
00104 
00105   if (_network_server) {
00106     NetworkServerUpdateCompanyPassworded(_local_company, !StrEmpty(_network_company_states[_local_company].password));
00107   }
00108 }
00109 
00110 
00111 /***********
00112  * Sending functions
00113  *   DEF_CLIENT_SEND_COMMAND has no parameters
00114  ************/
00115 
00116 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_COMPANY_INFO)
00117 {
00118   /*
00119    * Packet: CLIENT_COMPANY_INFO
00120    * Function: Request company-info (in detail)
00121    * Data:
00122    *    <none>
00123    */
00124   Packet *p;
00125   _network_join_status = NETWORK_JOIN_STATUS_GETTING_COMPANY_INFO;
00126   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00127 
00128   p = new Packet(PACKET_CLIENT_COMPANY_INFO);
00129   MY_CLIENT->Send_Packet(p);
00130   return NETWORK_RECV_STATUS_OKAY;
00131 }
00132 
00133 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_JOIN)
00134 {
00135   /*
00136    * Packet: CLIENT_JOIN
00137    * Function: Try to join the server
00138    * Data:
00139    *    String: OpenTTD Revision (norev000 if no revision)
00140    *    String: Client Name (max NETWORK_NAME_LENGTH)
00141    *    uint8:  Play as Company id (1..MAX_COMPANIES)
00142    *    uint8:  Language ID
00143    */
00144 
00145   Packet *p;
00146   _network_join_status = NETWORK_JOIN_STATUS_AUTHORIZING;
00147   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00148 
00149   p = new Packet(PACKET_CLIENT_JOIN);
00150   p->Send_string(_openttd_revision);
00151   p->Send_string(_settings_client.network.client_name); // Client name
00152   p->Send_uint8 (_network_join_as);     // PlayAs
00153   p->Send_uint8 (NETLANG_ANY);          // Language
00154   MY_CLIENT->Send_Packet(p);
00155   return NETWORK_RECV_STATUS_OKAY;
00156 }
00157 
00158 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)
00159 {
00160   /*
00161    * Packet: CLIENT_NEWGRFS_CHECKED
00162    * Function: Tell the server that we have the required GRFs
00163    * Data:
00164    */
00165 
00166   Packet *p = new Packet(PACKET_CLIENT_NEWGRFS_CHECKED);
00167   MY_CLIENT->Send_Packet(p);
00168   return NETWORK_RECV_STATUS_OKAY;
00169 }
00170 
00171 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_GAME_PASSWORD)(const char *password)
00172 {
00173   /*
00174    * Packet: CLIENT_GAME_PASSWORD
00175    * Function: Send a password to the server to authorize
00176    * Data:
00177    *    uint8:  NetworkPasswordType
00178    *    String: Password
00179    */
00180   Packet *p = new Packet(PACKET_CLIENT_GAME_PASSWORD);
00181   p->Send_string(password);
00182   MY_CLIENT->Send_Packet(p);
00183   return NETWORK_RECV_STATUS_OKAY;
00184 }
00185 
00186 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_COMPANY_PASSWORD)(const char *password)
00187 {
00188   /*
00189    * Packet: CLIENT_COMPANY_PASSWORD
00190    * Function: Send a password to the server to authorize
00191    * Data:
00192    *    uint8:  NetworkPasswordType
00193    *    String: Password
00194    */
00195   Packet *p = new Packet(PACKET_CLIENT_COMPANY_PASSWORD);
00196   p->Send_string(GenerateCompanyPasswordHash(password));
00197   MY_CLIENT->Send_Packet(p);
00198   return NETWORK_RECV_STATUS_OKAY;
00199 }
00200 
00201 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_GETMAP)
00202 {
00203   /*
00204    * Packet: CLIENT_GETMAP
00205    * Function: Request the map from the server
00206    * Data:
00207    *    <none>
00208    */
00209 
00210   Packet *p = new Packet(PACKET_CLIENT_GETMAP);
00211   /* Send the OpenTTD version to the server, let it validate it too.
00212    * But only do it for stable releases because of those we are sure
00213    * that everybody has the same NewGRF version. For trunk and the
00214    * branches we make tarballs of the OpenTTDs compiled from tarball
00215    * will have the lower bits set to 0. As such they would become
00216    * incompatible, which we would like to prevent by this. */
00217   if (HasBit(_openttd_newgrf_version, 19)) p->Send_uint32(_openttd_newgrf_version);
00218   MY_CLIENT->Send_Packet(p);
00219   return NETWORK_RECV_STATUS_OKAY;
00220 }
00221 
00222 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_MAP_OK)
00223 {
00224   /*
00225    * Packet: CLIENT_MAP_OK
00226    * Function: Tell the server that we are done receiving/loading the map
00227    * Data:
00228    *    <none>
00229    */
00230 
00231   Packet *p = new Packet(PACKET_CLIENT_MAP_OK);
00232   MY_CLIENT->Send_Packet(p);
00233   return NETWORK_RECV_STATUS_OKAY;
00234 }
00235 
00236 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_ACK)
00237 {
00238   /*
00239    * Packet: CLIENT_ACK
00240    * Function: Tell the server we are done with this frame
00241    * Data:
00242    *    uint32: current FrameCounter of the client
00243    */
00244 
00245   Packet *p = new Packet(PACKET_CLIENT_ACK);
00246 
00247   p->Send_uint32(_frame_counter);
00248   MY_CLIENT->Send_Packet(p);
00249   return NETWORK_RECV_STATUS_OKAY;
00250 }
00251 
00252 /* Send a command packet to the server */
00253 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_COMMAND)(const CommandPacket *cp)
00254 {
00255   /*
00256    * Packet: CLIENT_COMMAND
00257    * Function: Send a DoCommand to the Server
00258    * Data:
00259    *    uint8:  CompanyID (0..MAX_COMPANIES-1)
00260    *    uint32: CommandID (see command.h)
00261    *    uint32: P1 (free variables used in DoCommand)
00262    *    uint32: P2
00263    *    uint32: Tile
00264    *    string: text
00265    *    uint8:  CallBackID
00266    */
00267 
00268   Packet *p = new Packet(PACKET_CLIENT_COMMAND);
00269   MY_CLIENT->Send_Command(p, cp);
00270 
00271   MY_CLIENT->Send_Packet(p);
00272   return NETWORK_RECV_STATUS_OKAY;
00273 }
00274 
00275 /* Send a chat-packet over the network */
00276 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_CHAT)(NetworkAction action, DestType type, int dest, const char *msg, int64 data)
00277 {
00278   /*
00279    * Packet: CLIENT_CHAT
00280    * Function: Send a chat-packet to the serve
00281    * Data:
00282    *    uint8:  ActionID (see network_data.h, NetworkAction)
00283    *    uint8:  Destination Type (see network_data.h, DestType);
00284    *    uint32: Destination CompanyID/Client-identifier
00285    *    String: Message (max NETWORK_CHAT_LENGTH)
00286    *    uint64: Some arbitrary number
00287    */
00288 
00289   Packet *p = new Packet(PACKET_CLIENT_CHAT);
00290 
00291   p->Send_uint8 (action);
00292   p->Send_uint8 (type);
00293   p->Send_uint32(dest);
00294   p->Send_string(msg);
00295   p->Send_uint64(data);
00296 
00297   MY_CLIENT->Send_Packet(p);
00298   return NETWORK_RECV_STATUS_OKAY;
00299 }
00300 
00301 /* Send an error-packet over the network */
00302 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_ERROR)(NetworkErrorCode errorno)
00303 {
00304   /*
00305    * Packet: CLIENT_ERROR
00306    * Function: The client made an error and is quiting the game
00307    * Data:
00308    *    uint8:  ErrorID (see network_data.h, NetworkErrorCode)
00309    */
00310   Packet *p = new Packet(PACKET_CLIENT_ERROR);
00311 
00312   p->Send_uint8(errorno);
00313   MY_CLIENT->Send_Packet(p);
00314   return NETWORK_RECV_STATUS_OKAY;
00315 }
00316 
00317 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_SET_PASSWORD)(const char *password)
00318 {
00319   /*
00320    * Packet: PACKET_CLIENT_SET_PASSWORD
00321    * Function: Set the password for the clients current company
00322    * Data:
00323    *    String: Password
00324    */
00325   Packet *p = new Packet(PACKET_CLIENT_SET_PASSWORD);
00326 
00327   p->Send_string(GenerateCompanyPasswordHash(password));
00328   MY_CLIENT->Send_Packet(p);
00329   return NETWORK_RECV_STATUS_OKAY;
00330 }
00331 
00332 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_SET_NAME)(const char *name)
00333 {
00334   /*
00335    * Packet: PACKET_CLIENT_SET_NAME
00336    * Function: Gives the client a new name
00337    * Data:
00338    *    String: Name
00339    */
00340   Packet *p = new Packet(PACKET_CLIENT_SET_NAME);
00341 
00342   p->Send_string(name);
00343   MY_CLIENT->Send_Packet(p);
00344   return NETWORK_RECV_STATUS_OKAY;
00345 }
00346 
00347 /* Send an quit-packet over the network */
00348 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_QUIT)()
00349 {
00350   /*
00351    * Packet: CLIENT_QUIT
00352    * Function: The client is quiting the game
00353    * Data:
00354    */
00355   Packet *p = new Packet(PACKET_CLIENT_QUIT);
00356 
00357   MY_CLIENT->Send_Packet(p);
00358   return NETWORK_RECV_STATUS_OKAY;
00359 }
00360 
00361 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_RCON)(const char *pass, const char *command)
00362 {
00363   Packet *p = new Packet(PACKET_CLIENT_RCON);
00364   p->Send_string(pass);
00365   p->Send_string(command);
00366   MY_CLIENT->Send_Packet(p);
00367   return NETWORK_RECV_STATUS_OKAY;
00368 }
00369 
00370 DEF_CLIENT_SEND_COMMAND_PARAM(PACKET_CLIENT_MOVE)(CompanyID company, const char *pass)
00371 {
00372   Packet *p = new Packet(PACKET_CLIENT_MOVE);
00373   p->Send_uint8(company);
00374   p->Send_string(GenerateCompanyPasswordHash(pass));
00375   MY_CLIENT->Send_Packet(p);
00376   return NETWORK_RECV_STATUS_OKAY;
00377 }
00378 
00379 
00380 /***********
00381  * Receiving functions
00382  *   DEF_CLIENT_RECEIVE_COMMAND has parameter: Packet *p
00383  ************/
00384 
00385 extern bool SafeSaveOrLoad(const char *filename, int mode, GameMode newgm, Subdirectory subdir);
00386 extern StringID _switch_mode_errorstr;
00387 
00388 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_FULL)
00389 {
00390   /* We try to join a server which is full */
00391   _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_FULL;
00392   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00393 
00394   return NETWORK_RECV_STATUS_SERVER_FULL;
00395 }
00396 
00397 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_BANNED)
00398 {
00399   /* We try to join a server where we are banned */
00400   _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_BANNED;
00401   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00402 
00403   return NETWORK_RECV_STATUS_SERVER_BANNED;
00404 }
00405 
00406 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMPANY_INFO)
00407 {
00408   byte company_info_version = p->Recv_uint8();
00409 
00410   if (!MY_CLIENT->HasClientQuit() && company_info_version == NETWORK_COMPANY_INFO_VERSION) {
00411     /* We have received all data... (there are no more packets coming) */
00412     if (!p->Recv_bool()) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00413 
00414     CompanyID current = (Owner)p->Recv_uint8();
00415     if (current >= MAX_COMPANIES) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00416 
00417     NetworkCompanyInfo *company_info = GetLobbyCompanyInfo(current);
00418     if (company_info == NULL) return NETWORK_RECV_STATUS_CLOSE_QUERY;
00419 
00420     p->Recv_string(company_info->company_name, sizeof(company_info->company_name));
00421     company_info->inaugurated_year = p->Recv_uint32();
00422     company_info->company_value    = p->Recv_uint64();
00423     company_info->money            = p->Recv_uint64();
00424     company_info->income           = p->Recv_uint64();
00425     company_info->performance      = p->Recv_uint16();
00426     company_info->use_password     = p->Recv_bool();
00427     for (int i = 0; i < NETWORK_VEHICLE_TYPES; i++)
00428       company_info->num_vehicle[i] = p->Recv_uint16();
00429     for (int i = 0; i < NETWORK_STATION_TYPES; i++)
00430       company_info->num_station[i] = p->Recv_uint16();
00431     company_info->ai               = p->Recv_bool();
00432 
00433     p->Recv_string(company_info->clients, sizeof(company_info->clients));
00434 
00435     SetWindowDirty(WC_NETWORK_WINDOW, 0);
00436 
00437     return NETWORK_RECV_STATUS_OKAY;
00438   }
00439 
00440   return NETWORK_RECV_STATUS_CLOSE_QUERY;
00441 }
00442 
00443 /* This packet contains info about the client (playas and name)
00444  *  as client we save this in NetworkClientInfo, linked via 'client_id'
00445  *  which is always an unique number on a server. */
00446 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CLIENT_INFO)
00447 {
00448   NetworkClientInfo *ci;
00449   ClientID client_id = (ClientID)p->Recv_uint32();
00450   CompanyID playas = (CompanyID)p->Recv_uint8();
00451   char name[NETWORK_NAME_LENGTH];
00452 
00453   p->Recv_string(name, sizeof(name));
00454 
00455   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00456 
00457   ci = NetworkFindClientInfoFromClientID(client_id);
00458   if (ci != NULL) {
00459     if (playas == ci->client_playas && strcmp(name, ci->client_name) != 0) {
00460       /* Client name changed, display the change */
00461       NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, name);
00462     } else if (playas != ci->client_playas) {
00463       /* The client changed from client-player..
00464        * Do not display that for now */
00465     }
00466 
00467     /* Make sure we're in the company the server tells us to be in,
00468      * for the rare case that we get moved while joining. */
00469     if (client_id == _network_own_client_id) SetLocalCompany(!Company::IsValidID(playas) ? COMPANY_SPECTATOR : playas);
00470 
00471     ci->client_playas = playas;
00472     strecpy(ci->client_name, name, lastof(ci->client_name));
00473 
00474     SetWindowDirty(WC_CLIENT_LIST, 0);
00475 
00476     return NETWORK_RECV_STATUS_OKAY;
00477   }
00478 
00479   /* We don't have this client_id yet, find an empty client_id, and put the data there */
00480   ci = new NetworkClientInfo(client_id);
00481   ci->client_playas = playas;
00482   if (client_id == _network_own_client_id) MY_CLIENT->SetInfo(ci);
00483 
00484   strecpy(ci->client_name, name, lastof(ci->client_name));
00485 
00486   SetWindowDirty(WC_CLIENT_LIST, 0);
00487 
00488   return NETWORK_RECV_STATUS_OKAY;
00489 }
00490 
00491 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_ERROR)
00492 {
00493   NetworkErrorCode error = (NetworkErrorCode)p->Recv_uint8();
00494 
00495   switch (error) {
00496     /* We made an error in the protocol, and our connection is closed.... */
00497     case NETWORK_ERROR_NOT_AUTHORIZED:
00498     case NETWORK_ERROR_NOT_EXPECTED:
00499     case NETWORK_ERROR_COMPANY_MISMATCH:
00500       _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_ERROR;
00501       break;
00502     case NETWORK_ERROR_FULL:
00503       _switch_mode_errorstr = STR_NETWORK_ERROR_SERVER_FULL;
00504       break;
00505     case NETWORK_ERROR_WRONG_REVISION:
00506       _switch_mode_errorstr = STR_NETWORK_ERROR_WRONG_REVISION;
00507       break;
00508     case NETWORK_ERROR_WRONG_PASSWORD:
00509       _switch_mode_errorstr = STR_NETWORK_ERROR_WRONG_PASSWORD;
00510       break;
00511     case NETWORK_ERROR_KICKED:
00512       _switch_mode_errorstr = STR_NETWORK_ERROR_KICKED;
00513       break;
00514     case NETWORK_ERROR_CHEATER:
00515       _switch_mode_errorstr = STR_NETWORK_ERROR_CHEATER;
00516       break;
00517     default:
00518       _switch_mode_errorstr = STR_NETWORK_ERROR_LOSTCONNECTION;
00519   }
00520 
00521   DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00522 
00523   return NETWORK_RECV_STATUS_SERVER_ERROR;
00524 }
00525 
00526 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CHECK_NEWGRFS)
00527 {
00528   uint grf_count = p->Recv_uint8();
00529   NetworkRecvStatus ret = NETWORK_RECV_STATUS_OKAY;
00530 
00531   /* Check all GRFs */
00532   for (; grf_count > 0; grf_count--) {
00533     GRFConfig c;
00534     MY_CLIENT->Recv_GRFIdentifier(p, &c);
00535 
00536     /* Check whether we know this GRF */
00537     const GRFConfig *f = FindGRFConfig(c.grfid, c.md5sum);
00538     if (f == NULL) {
00539       /* We do not know this GRF, bail out of initialization */
00540       char buf[sizeof(c.md5sum) * 2 + 1];
00541       md5sumToString(buf, lastof(buf), c.md5sum);
00542       DEBUG(grf, 0, "NewGRF %08X not found; checksum %s", BSWAP32(c.grfid), buf);
00543       ret = NETWORK_RECV_STATUS_NEWGRF_MISMATCH;
00544     }
00545   }
00546 
00547   if (ret == NETWORK_RECV_STATUS_OKAY) {
00548     /* Start receiving the map */
00549     return SEND_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)();
00550   }
00551 
00552   /* NewGRF mismatch, bail out */
00553   _switch_mode_errorstr = STR_NETWORK_ERROR_NEWGRF_MISMATCH;
00554   return ret;
00555 }
00556 
00557 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEED_GAME_PASSWORD)
00558 {
00559   const char *password = _network_join_server_password;
00560   if (!StrEmpty(password)) {
00561     return SEND_COMMAND(PACKET_CLIENT_GAME_PASSWORD)(password);
00562   }
00563 
00564   ShowNetworkNeedPassword(NETWORK_GAME_PASSWORD);
00565 
00566   return NETWORK_RECV_STATUS_OKAY;
00567 }
00568 
00569 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEED_COMPANY_PASSWORD)
00570 {
00571   _password_game_seed = p->Recv_uint32();
00572   p->Recv_string(_password_server_id, sizeof(_password_server_id));
00573   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00574 
00575   const char *password = _network_join_company_password;
00576   if (!StrEmpty(password)) {
00577     return SEND_COMMAND(PACKET_CLIENT_COMPANY_PASSWORD)(password);
00578   }
00579 
00580   ShowNetworkNeedPassword(NETWORK_COMPANY_PASSWORD);
00581 
00582   return NETWORK_RECV_STATUS_OKAY;
00583 }
00584 
00585 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_WELCOME)
00586 {
00587   _network_own_client_id = (ClientID)p->Recv_uint32();
00588 
00589   /* Initialize the password hash salting variables, even if they were previously. */
00590   _password_game_seed = p->Recv_uint32();
00591   p->Recv_string(_password_server_id, sizeof(_password_server_id));
00592 
00593   /* Start receiving the map */
00594   return SEND_COMMAND(PACKET_CLIENT_GETMAP)();
00595 }
00596 
00597 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_WAIT)
00598 {
00599   _network_join_status = NETWORK_JOIN_STATUS_WAITING;
00600   _network_join_waiting = p->Recv_uint8();
00601   SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00602 
00603   /* We are put on hold for receiving the map.. we need GUI for this ;) */
00604   DEBUG(net, 1, "The server is currently busy sending the map to someone else, please wait..." );
00605   DEBUG(net, 1, "There are %d clients in front of you", _network_join_waiting);
00606 
00607   return NETWORK_RECV_STATUS_OKAY;
00608 }
00609 
00610 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_MAP)
00611 {
00612   byte maptype;
00613 
00614   maptype = p->Recv_uint8();
00615 
00616   if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00617 
00618   /* First packet, init some stuff */
00619   if (maptype == MAP_PACKET_START) {
00620     if (_network_client_download_file != NULL) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00621     _network_client_download_file = FioFOpenFile("network_client.tmp", "wb", AUTOSAVE_DIR);
00622     if (_network_client_download_file == NULL) {
00623       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00624       return NETWORK_RECV_STATUS_SAVEGAME;
00625     }
00626 
00627     _frame_counter = _frame_counter_server = _frame_counter_max = p->Recv_uint32();
00628 
00629     _network_join_bytes = 0;
00630     _network_join_bytes_total = p->Recv_uint32();
00631 
00632     /* If the network connection has been closed due to loss of connection
00633      * or when _network_join_kbytes_total is 0, the join status window will
00634      * do a division by zero. When the connection is lost, we just return
00635      * that. If kbytes_total is 0, the packet must be malformed as a
00636      * savegame less than 1 kilobyte is practically impossible. */
00637     if (MY_CLIENT->HasClientQuit()) return NETWORK_RECV_STATUS_CONN_LOST;
00638     if (_network_join_bytes_total == 0) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00639 
00640     _network_join_status = NETWORK_JOIN_STATUS_DOWNLOADING;
00641     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00642 
00643     /* The first packet does not contain any more data */
00644     return NETWORK_RECV_STATUS_OKAY;
00645   }
00646 
00647   if (_network_client_download_file == NULL) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
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, _network_client_download_file) != (size_t)(p->size - p->pos)) {
00652       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00653       fclose(_network_client_download_file);
00654       _network_client_download_file = NULL;
00655       return NETWORK_RECV_STATUS_SAVEGAME;
00656     }
00657 
00658     _network_join_bytes = ftell(_network_client_download_file);
00659     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00660   }
00661 
00662   /* Check if this was the last packet */
00663   if (maptype == MAP_PACKET_END) {
00664     fclose(_network_client_download_file);
00665     _network_client_download_file = NULL;
00666 
00667     _network_join_status = NETWORK_JOIN_STATUS_PROCESSING;
00668     SetWindowDirty(WC_NETWORK_STATUS_WINDOW, 0);
00669 
00670     /* The map is done downloading, load it */
00671     if (!SafeSaveOrLoad("network_client.tmp", SL_LOAD, GM_NORMAL, AUTOSAVE_DIR)) {
00672       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
00673       _switch_mode_errorstr = STR_NETWORK_ERROR_SAVEGAMEERROR;
00674       return NETWORK_RECV_STATUS_SAVEGAME;
00675     }
00676     /* If the savegame has successfully loaded, ALL windows have been removed,
00677      * only toolbar/statusbar and gamefield are visible */
00678 
00679     /* Say we received the map and loaded it correctly! */
00680     SEND_COMMAND(PACKET_CLIENT_MAP_OK)();
00681 
00682     /* New company/spectator (invalid company) or company we want to join is not active
00683      * Switch local company to spectator and await the server's judgement */
00684     if (_network_join_as == COMPANY_NEW_COMPANY || !Company::IsValidID(_network_join_as)) {
00685       SetLocalCompany(COMPANY_SPECTATOR);
00686 
00687       if (_network_join_as != COMPANY_SPECTATOR) {
00688         /* We have arrived and ready to start playing; send a command to make a new company;
00689          * the server will give us a client-id and let us in */
00690         _network_join_status = NETWORK_JOIN_STATUS_REGISTERING;
00691         ShowJoinStatusWindow();
00692         NetworkSend_Command(0, 0, 0, CMD_COMPANY_CTRL, NULL, NULL, _local_company);
00693       }
00694     } else {
00695       /* take control over an existing company */
00696       SetLocalCompany(_network_join_as);
00697     }
00698   }
00699 
00700   return NETWORK_RECV_STATUS_OKAY;
00701 }
00702 
00703 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_FRAME)
00704 {
00705   _frame_counter_server = p->Recv_uint32();
00706   _frame_counter_max = p->Recv_uint32();
00707 #ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME
00708   /* Test if the server supports this option
00709    *  and if we are at the frame the server is */
00710   if (p->pos < p->size) {
00711     _sync_frame = _frame_counter_server;
00712     _sync_seed_1 = p->Recv_uint32();
00713 #ifdef NETWORK_SEND_DOUBLE_SEED
00714     _sync_seed_2 = p->Recv_uint32();
00715 #endif
00716   }
00717 #endif
00718   DEBUG(net, 5, "Received FRAME %d", _frame_counter_server);
00719 
00720   /* Let the server know that we received this frame correctly
00721    *  We do this only once per day, to save some bandwidth ;) */
00722   if (!_network_first_time && last_ack_frame < _frame_counter) {
00723     last_ack_frame = _frame_counter + DAY_TICKS;
00724     DEBUG(net, 4, "Sent ACK at %d", _frame_counter);
00725     SEND_COMMAND(PACKET_CLIENT_ACK)();
00726   }
00727 
00728   return NETWORK_RECV_STATUS_OKAY;
00729 }
00730 
00731 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_SYNC)
00732 {
00733   _sync_frame = p->Recv_uint32();
00734   _sync_seed_1 = p->Recv_uint32();
00735 #ifdef NETWORK_SEND_DOUBLE_SEED
00736   _sync_seed_2 = p->Recv_uint32();
00737 #endif
00738 
00739   return NETWORK_RECV_STATUS_OKAY;
00740 }
00741 
00742 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMMAND)
00743 {
00744   CommandPacket cp;
00745   const char *err = MY_CLIENT->Recv_Command(p, &cp);
00746   cp.frame    = p->Recv_uint32();
00747   cp.my_cmd   = p->Recv_bool();
00748   cp.next     = NULL;
00749 
00750   if (err != NULL) {
00751     IConsolePrintF(CC_ERROR, "WARNING: %s from server, dropping...", err);
00752     return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00753   }
00754 
00755   /* The server did send us this command..
00756    *  queue it in our own queue, so we can handle it in the upcoming frame! */
00757   NetworkAddCommandQueue(cp);
00758 
00759   return NETWORK_RECV_STATUS_OKAY;
00760 }
00761 
00762 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CHAT)
00763 {
00764   char name[NETWORK_NAME_LENGTH], msg[NETWORK_CHAT_LENGTH];
00765   const NetworkClientInfo *ci = NULL, *ci_to;
00766 
00767   NetworkAction action = (NetworkAction)p->Recv_uint8();
00768   ClientID client_id = (ClientID)p->Recv_uint32();
00769   bool self_send = p->Recv_bool();
00770   p->Recv_string(msg, NETWORK_CHAT_LENGTH);
00771   int64 data = p->Recv_uint64();
00772 
00773   ci_to = NetworkFindClientInfoFromClientID(client_id);
00774   if (ci_to == NULL) return NETWORK_RECV_STATUS_OKAY;
00775 
00776   /* Did we initiate the action locally? */
00777   if (self_send) {
00778     switch (action) {
00779       case NETWORK_ACTION_CHAT_CLIENT:
00780         /* For speaking to client we need the client-name */
00781         snprintf(name, sizeof(name), "%s", ci_to->client_name);
00782         ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
00783         break;
00784 
00785       /* For speaking to company or giving money, we need the company-name */
00786       case NETWORK_ACTION_GIVE_MONEY:
00787         if (!Company::IsValidID(ci_to->client_playas)) return NETWORK_RECV_STATUS_OKAY;
00788         /* fallthrough */
00789       case NETWORK_ACTION_CHAT_COMPANY: {
00790         StringID str = Company::IsValidID(ci_to->client_playas) ? STR_COMPANY_NAME : STR_NETWORK_SPECTATORS;
00791         SetDParam(0, ci_to->client_playas);
00792 
00793         GetString(name, str, lastof(name));
00794         ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
00795       } break;
00796 
00797       default: return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00798     }
00799   } else {
00800     /* Display message from somebody else */
00801     snprintf(name, sizeof(name), "%s", ci_to->client_name);
00802     ci = ci_to;
00803   }
00804 
00805   if (ci != NULL) {
00806     NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), self_send, name, msg, data);
00807   }
00808   return NETWORK_RECV_STATUS_OKAY;
00809 }
00810 
00811 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_ERROR_QUIT)
00812 {
00813   ClientID client_id = (ClientID)p->Recv_uint32();
00814 
00815   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00816   if (ci != NULL) {
00817     NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, ci->client_name, NULL, GetNetworkErrorMsg((NetworkErrorCode)p->Recv_uint8()));
00818     delete ci;
00819   }
00820 
00821   SetWindowDirty(WC_CLIENT_LIST, 0);
00822 
00823   return NETWORK_RECV_STATUS_OKAY;
00824 }
00825 
00826 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_QUIT)
00827 {
00828   NetworkClientInfo *ci;
00829 
00830   ClientID client_id = (ClientID)p->Recv_uint32();
00831 
00832   ci = NetworkFindClientInfoFromClientID(client_id);
00833   if (ci != NULL) {
00834     NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, ci->client_name, NULL, STR_NETWORK_MESSAGE_CLIENT_LEAVING);
00835     delete ci;
00836   } else {
00837     DEBUG(net, 0, "Unknown client (%d) is leaving the game", client_id);
00838   }
00839 
00840   SetWindowDirty(WC_CLIENT_LIST, 0);
00841 
00842   /* If we come here it means we could not locate the client.. strange :s */
00843   return NETWORK_RECV_STATUS_OKAY;
00844 }
00845 
00846 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_JOIN)
00847 {
00848   ClientID client_id = (ClientID)p->Recv_uint32();
00849 
00850   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00851   if (ci != NULL) {
00852     NetworkTextMessage(NETWORK_ACTION_JOIN, CC_DEFAULT, false, ci->client_name);
00853   }
00854 
00855   SetWindowDirty(WC_CLIENT_LIST, 0);
00856 
00857   return NETWORK_RECV_STATUS_OKAY;
00858 }
00859 
00860 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_SHUTDOWN)
00861 {
00862   _switch_mode_errorstr = STR_NETWORK_MESSAGE_SERVER_SHUTDOWN;
00863 
00864   return NETWORK_RECV_STATUS_SERVER_ERROR;
00865 }
00866 
00867 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_NEWGAME)
00868 {
00869   /* To trottle the reconnects a bit, every clients waits
00870    *  his _local_company value before reconnecting
00871    * COMPANY_SPECTATOR is currently 255, so to avoid long wait periods
00872    *  set the max to 10. */
00873   _network_reconnect = min(_local_company + 1, 10);
00874   _switch_mode_errorstr = STR_NETWORK_MESSAGE_SERVER_REBOOT;
00875 
00876   return NETWORK_RECV_STATUS_SERVER_ERROR;
00877 }
00878 
00879 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_RCON)
00880 {
00881   char rcon_out[NETWORK_RCONCOMMAND_LENGTH];
00882 
00883   ConsoleColour colour_code = (ConsoleColour)p->Recv_uint16();
00884   p->Recv_string(rcon_out, sizeof(rcon_out));
00885 
00886   IConsolePrint(colour_code, rcon_out);
00887 
00888   return NETWORK_RECV_STATUS_OKAY;
00889 }
00890 
00891 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_MOVE)
00892 {
00893   /* Nothing more in this packet... */
00894   ClientID client_id   = (ClientID)p->Recv_uint32();
00895   CompanyID company_id = (CompanyID)p->Recv_uint8();
00896 
00897   if (client_id == 0) {
00898     /* definitely an invalid client id, debug message and do nothing. */
00899     DEBUG(net, 0, "[move] received invalid client index = 0");
00900     return NETWORK_RECV_STATUS_MALFORMED_PACKET;
00901   }
00902 
00903   const NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
00904   /* Just make sure we do not try to use a client_index that does not exist */
00905   if (ci == NULL) return NETWORK_RECV_STATUS_OKAY;
00906 
00907   /* if not valid player, force spectator, else check player exists */
00908   if (!Company::IsValidID(company_id)) company_id = COMPANY_SPECTATOR;
00909 
00910   if (client_id == _network_own_client_id) {
00911     SetLocalCompany(company_id);
00912   }
00913 
00914   return NETWORK_RECV_STATUS_OKAY;
00915 }
00916 
00917 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_CONFIG_UPDATE)
00918 {
00919   _network_server_max_companies = p->Recv_uint8();
00920   _network_server_max_spectators = p->Recv_uint8();
00921 
00922   return NETWORK_RECV_STATUS_OKAY;
00923 }
00924 
00925 DEF_CLIENT_RECEIVE_COMMAND(PACKET_SERVER_COMPANY_UPDATE)
00926 {
00927   _network_company_passworded = p->Recv_uint16();
00928   SetWindowClassesDirty(WC_COMPANY);
00929 
00930   return NETWORK_RECV_STATUS_OKAY;
00931 }
00932 
00933 
00934 /* The layout for the receive-functions by the client */
00935 typedef NetworkRecvStatus NetworkClientPacket(Packet *p);
00936 
00937 /* This array matches PacketType. At an incoming
00938  *  packet it is matches against this array
00939  *  and that way the right function to handle that
00940  *  packet is found. */
00941 static NetworkClientPacket * const _network_client_packet[] = {
00942   RECEIVE_COMMAND(PACKET_SERVER_FULL),
00943   RECEIVE_COMMAND(PACKET_SERVER_BANNED),
00944   NULL, // PACKET_CLIENT_JOIN,
00945   RECEIVE_COMMAND(PACKET_SERVER_ERROR),
00946   NULL, // PACKET_CLIENT_COMPANY_INFO,
00947   RECEIVE_COMMAND(PACKET_SERVER_COMPANY_INFO),
00948   RECEIVE_COMMAND(PACKET_SERVER_CLIENT_INFO),
00949   RECEIVE_COMMAND(PACKET_SERVER_NEED_GAME_PASSWORD),
00950   RECEIVE_COMMAND(PACKET_SERVER_NEED_COMPANY_PASSWORD),
00951   NULL, // PACKET_CLIENT_GAME_PASSWORD,
00952   NULL, // PACKET_CLIENT_COMPANY_PASSWORD,
00953   RECEIVE_COMMAND(PACKET_SERVER_WELCOME),
00954   NULL, // PACKET_CLIENT_GETMAP,
00955   RECEIVE_COMMAND(PACKET_SERVER_WAIT),
00956   RECEIVE_COMMAND(PACKET_SERVER_MAP),
00957   NULL, // PACKET_CLIENT_MAP_OK,
00958   RECEIVE_COMMAND(PACKET_SERVER_JOIN),
00959   RECEIVE_COMMAND(PACKET_SERVER_FRAME),
00960   RECEIVE_COMMAND(PACKET_SERVER_SYNC),
00961   NULL, // PACKET_CLIENT_ACK,
00962   NULL, // PACKET_CLIENT_COMMAND,
00963   RECEIVE_COMMAND(PACKET_SERVER_COMMAND),
00964   NULL, // PACKET_CLIENT_CHAT,
00965   RECEIVE_COMMAND(PACKET_SERVER_CHAT),
00966   NULL, // PACKET_CLIENT_SET_PASSWORD,
00967   NULL, // PACKET_CLIENT_SET_NAME,
00968   NULL, // PACKET_CLIENT_QUIT,
00969   NULL, // PACKET_CLIENT_ERROR,
00970   RECEIVE_COMMAND(PACKET_SERVER_QUIT),
00971   RECEIVE_COMMAND(PACKET_SERVER_ERROR_QUIT),
00972   RECEIVE_COMMAND(PACKET_SERVER_SHUTDOWN),
00973   RECEIVE_COMMAND(PACKET_SERVER_NEWGAME),
00974   RECEIVE_COMMAND(PACKET_SERVER_RCON),
00975   NULL, // PACKET_CLIENT_RCON,
00976   RECEIVE_COMMAND(PACKET_SERVER_CHECK_NEWGRFS),
00977   NULL, // PACKET_CLIENT_NEWGRFS_CHECKED,
00978   RECEIVE_COMMAND(PACKET_SERVER_MOVE),
00979   NULL, // PACKET_CLIENT_MOVE
00980   RECEIVE_COMMAND(PACKET_SERVER_COMPANY_UPDATE),
00981   RECEIVE_COMMAND(PACKET_SERVER_CONFIG_UPDATE),
00982 };
00983 
00984 /* If this fails, check the array above with network_data.h */
00985 assert_compile(lengthof(_network_client_packet) == PACKET_END);
00986 
00987 /* Is called after a client is connected to the server */
00988 void NetworkClient_Connected()
00989 {
00990   /* Set the frame-counter to 0 so nothing happens till we are ready */
00991   _frame_counter = 0;
00992   _frame_counter_server = 0;
00993   last_ack_frame = 0;
00994 
00995   /* If we're joining a new server, we definitely don't
00996    * need the old download file handle anymore. */
00997   if (_network_client_download_file != NULL) {
00998     fclose(_network_client_download_file);
00999     _network_client_download_file = NULL;
01000   }
01001 
01002   /* Request the game-info */
01003   SEND_COMMAND(PACKET_CLIENT_JOIN)();
01004 }
01005 
01006 /* Reads the packets from the socket-stream, if available */
01007 NetworkRecvStatus NetworkClient_ReadPackets(NetworkClientSocket *cs)
01008 {
01009   Packet *p;
01010   NetworkRecvStatus res = NETWORK_RECV_STATUS_OKAY;
01011 
01012   while (res == NETWORK_RECV_STATUS_OKAY && (p = cs->Recv_Packet()) != NULL) {
01013     byte type = p->Recv_uint8();
01014     if (type < PACKET_END && _network_client_packet[type] != NULL && !MY_CLIENT->HasClientQuit()) {
01015       res = _network_client_packet[type](p);
01016     } else {
01017       res = NETWORK_RECV_STATUS_MALFORMED_PACKET;
01018       DEBUG(net, 0, "[client] received invalid packet type %d", type);
01019     }
01020 
01021     delete p;
01022   }
01023 
01024   return res;
01025 }
01026 
01027 void NetworkClientSendRcon(const char *password, const char *command)
01028 {
01029   SEND_COMMAND(PACKET_CLIENT_RCON)(password, command);
01030 }
01031 
01038 void NetworkClientRequestMove(CompanyID company_id, const char *pass)
01039 {
01040   SEND_COMMAND(PACKET_CLIENT_MOVE)(company_id, pass);
01041 }
01042 
01043 void NetworkClientsToSpectators(CompanyID cid)
01044 {
01045   /* If our company is changing owner, go to spectators */
01046   if (cid == _local_company) SetLocalCompany(COMPANY_SPECTATOR);
01047 
01048   NetworkClientInfo *ci;
01049   FOR_ALL_CLIENT_INFOS(ci) {
01050     if (ci->client_playas != cid) continue;
01051     NetworkTextMessage(NETWORK_ACTION_COMPANY_SPECTATOR, CC_DEFAULT, false, ci->client_name);
01052     ci->client_playas = COMPANY_SPECTATOR;
01053   }
01054 }
01055 
01056 void NetworkUpdateClientName()
01057 {
01058   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(_network_own_client_id);
01059 
01060   if (ci == NULL) return;
01061 
01062   /* Don't change the name if it is the same as the old name */
01063   if (strcmp(ci->client_name, _settings_client.network.client_name) != 0) {
01064     if (!_network_server) {
01065       SEND_COMMAND(PACKET_CLIENT_SET_NAME)(_settings_client.network.client_name);
01066     } else {
01067       if (NetworkFindName(_settings_client.network.client_name)) {
01068         NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, _settings_client.network.client_name);
01069         strecpy(ci->client_name, _settings_client.network.client_name, lastof(ci->client_name));
01070         NetworkUpdateClientInfo(CLIENT_ID_SERVER);
01071       }
01072     }
01073   }
01074 }
01075 
01076 void NetworkClientSendChat(NetworkAction action, DestType type, int dest, const char *msg, int64 data)
01077 {
01078   SEND_COMMAND(PACKET_CLIENT_CHAT)(action, type, dest, msg, data);
01079 }
01080 
01081 static void NetworkClientSetPassword(const char *password)
01082 {
01083   SEND_COMMAND(PACKET_CLIENT_SET_PASSWORD)(password);
01084 }
01085 
01091 bool NetworkClientPreferTeamChat(const NetworkClientInfo *cio)
01092 {
01093   /* Only companies actually playing can speak to team. Eg spectators cannot */
01094   if (!_settings_client.gui.prefer_teamchat || !Company::IsValidID(cio->client_playas)) return false;
01095 
01096   const NetworkClientInfo *ci;
01097   FOR_ALL_CLIENT_INFOS(ci) {
01098     if (ci->client_playas == cio->client_playas && ci != cio) return true;
01099   }
01100 
01101   return false;
01102 }
01103 
01109 const char *NetworkChangeCompanyPassword(const char *password)
01110 {
01111   if (strcmp(password, "*") == 0) password = "";
01112 
01113   if (!_network_server) {
01114     NetworkClientSetPassword(password);
01115   } else {
01116     HashCurrentCompanyPassword(password);
01117   }
01118 
01119   return password;
01120 }
01121 
01126 bool NetworkMaxCompaniesReached()
01127 {
01128   return Company::GetNumItems() >= (_network_server ? _settings_client.network.max_companies : _network_server_max_companies);
01129 }
01130 
01135 bool NetworkMaxSpectatorsReached()
01136 {
01137   return NetworkSpectatorCount() >= (_network_server ? _settings_client.network.max_spectators : _network_server_max_spectators);
01138 }
01139 
01143 void NetworkPrintClients()
01144 {
01145   NetworkClientInfo *ci;
01146   FOR_ALL_CLIENT_INFOS(ci) {
01147     IConsolePrintF(CC_INFO, "Client #%1d  name: '%s'  company: %1d  IP: %s",
01148         ci->client_id,
01149         ci->client_name,
01150         ci->client_playas + (Company::IsValidID(ci->client_playas) ? 1 : 0),
01151         GetClientIP(ci));
01152   }
01153 }
01154 
01155 #endif /* ENABLE_NETWORK */

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