network_server.cpp

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00001 /* $Id: network_server.cpp 16245 2009-05-06 22:21:32Z rubidium $ */
00002 
00005 #ifdef ENABLE_NETWORK
00006 
00007 #include "../stdafx.h"
00008 #include "../debug.h"
00009 #include "../strings_func.h"
00010 #include "network_internal.h"
00011 #include "../vehicle_base.h"
00012 #include "../date_func.h"
00013 #include "network_server.h"
00014 #include "network_udp.h"
00015 #include "../console_func.h"
00016 #include "../command_func.h"
00017 #include "../saveload/saveload.h"
00018 #include "../station_base.h"
00019 #include "../genworld.h"
00020 #include "../fileio_func.h"
00021 #include "../string_func.h"
00022 #include "../company_func.h"
00023 #include "../company_gui.h"
00024 #include "../settings_type.h"
00025 #include "../window_func.h"
00026 
00027 #include "table/strings.h"
00028 
00029 /* This file handles all the server-commands */
00030 
00031 static void NetworkHandleCommandQueue(NetworkClientSocket *cs);
00032 
00033 /***********
00034  * Sending functions
00035  *   DEF_SERVER_SEND_COMMAND has parameter: NetworkClientSocket *cs
00036  ************/
00037 
00038 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CLIENT_INFO)(NetworkClientSocket *cs, NetworkClientInfo *ci)
00039 {
00040   /*
00041    * Packet: SERVER_CLIENT_INFO
00042    * Function: Sends info about a client
00043    * Data:
00044    *    uint32:  The identifier of the client (always unique on a server. 1 = server, 0 is invalid)
00045    *    uint8:  As which company the client is playing
00046    *    String: The name of the client
00047    */
00048 
00049   if (ci->client_id != INVALID_CLIENT_ID) {
00050     Packet *p = NetworkSend_Init(PACKET_SERVER_CLIENT_INFO);
00051     p->Send_uint32(ci->client_id);
00052     p->Send_uint8 (ci->client_playas);
00053     p->Send_string(ci->client_name);
00054 
00055     cs->Send_Packet(p);
00056   }
00057 }
00058 
00059 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_COMPANY_INFO)
00060 {
00061   /*
00062    * Packet: SERVER_COMPANY_INFO
00063    * Function: Sends info about the companies
00064    * Data:
00065    */
00066 
00067   /* Fetch the latest version of the stats */
00068   NetworkCompanyStats company_stats[MAX_COMPANIES];
00069   NetworkPopulateCompanyStats(company_stats);
00070 
00071   /* Make a list of all clients per company */
00072   char clients[MAX_COMPANIES][NETWORK_CLIENTS_LENGTH];
00073   NetworkClientSocket *csi;
00074   memset(clients, 0, sizeof(clients));
00075 
00076   /* Add the local player (if not dedicated) */
00077   const NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
00078   if (ci != NULL && IsValidCompanyID(ci->client_playas)) {
00079     strecpy(clients[ci->client_playas], ci->client_name, lastof(clients[ci->client_playas]));
00080   }
00081 
00082   FOR_ALL_CLIENT_SOCKETS(csi) {
00083     char client_name[NETWORK_CLIENT_NAME_LENGTH];
00084 
00085     NetworkGetClientName(client_name, sizeof(client_name), csi);
00086 
00087     ci = csi->GetInfo();
00088     if (ci != NULL && IsValidCompanyID(ci->client_playas)) {
00089       if (!StrEmpty(clients[ci->client_playas])) {
00090         strecat(clients[ci->client_playas], ", ", lastof(clients[ci->client_playas]));
00091       }
00092 
00093       strecat(clients[ci->client_playas], client_name, lastof(clients[ci->client_playas]));
00094     }
00095   }
00096 
00097   /* Now send the data */
00098 
00099   Company *company;
00100   Packet *p;
00101 
00102   FOR_ALL_COMPANIES(company) {
00103     p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);
00104 
00105     p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION);
00106     p->Send_bool  (true);
00107     cs->Send_CompanyInformation(p, company, &company_stats[company->index]);
00108 
00109     if (StrEmpty(clients[company->index])) {
00110       p->Send_string("<none>");
00111     } else {
00112       p->Send_string(clients[company->index]);
00113     }
00114 
00115     cs->Send_Packet(p);
00116   }
00117 
00118   p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);
00119 
00120   p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION);
00121   p->Send_bool  (false);
00122 
00123   cs->Send_Packet(p);
00124 }
00125 
00126 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR)(NetworkClientSocket *cs, NetworkErrorCode error)
00127 {
00128   /*
00129    * Packet: SERVER_ERROR
00130    * Function: The client made an error
00131    * Data:
00132    *    uint8:  ErrorID (see network_data.h, NetworkErrorCode)
00133    */
00134 
00135   char str[100];
00136   Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR);
00137 
00138   p->Send_uint8(error);
00139   cs->Send_Packet(p);
00140 
00141   StringID strid = GetNetworkErrorMsg(error);
00142   GetString(str, strid, lastof(str));
00143 
00144   /* Only send when the current client was in game */
00145   if (cs->status > STATUS_AUTH) {
00146     NetworkClientSocket *new_cs;
00147     char client_name[NETWORK_CLIENT_NAME_LENGTH];
00148 
00149     NetworkGetClientName(client_name, sizeof(client_name), cs);
00150 
00151     DEBUG(net, 1, "'%s' made an error and has been disconnected. Reason: '%s'", client_name, str);
00152 
00153     NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, strid);
00154 
00155     FOR_ALL_CLIENT_SOCKETS(new_cs) {
00156       if (new_cs->status > STATUS_AUTH && new_cs != cs) {
00157         /* Some errors we filter to a more general error. Clients don't have to know the real
00158          *  reason a joining failed. */
00159         if (error == NETWORK_ERROR_NOT_AUTHORIZED || error == NETWORK_ERROR_NOT_EXPECTED || error == NETWORK_ERROR_WRONG_REVISION)
00160           error = NETWORK_ERROR_ILLEGAL_PACKET;
00161 
00162         SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->client_id, error);
00163       }
00164     }
00165   } else {
00166     DEBUG(net, 1, "Client %d made an error and has been disconnected. Reason: '%s'", cs->client_id, str);
00167   }
00168 
00169   cs->has_quit = true;
00170 
00171   /* Make sure the data get's there before we close the connection */
00172   cs->Send_Packets();
00173 
00174   /* The client made a mistake, so drop his connection now! */
00175   NetworkCloseClient(cs);
00176 }
00177 
00178 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHECK_NEWGRFS)(NetworkClientSocket *cs)
00179 {
00180   /*
00181    * Packet: PACKET_SERVER_CHECK_NEWGRFS
00182    * Function: Sends info about the used GRFs to the client
00183    * Data:
00184    *      uint8:  Amount of GRFs
00185    *    And then for each GRF:
00186    *      uint32: GRF ID
00187    * 16 * uint8:  MD5 checksum of the GRF
00188    */
00189 
00190   Packet *p = NetworkSend_Init(PACKET_SERVER_CHECK_NEWGRFS);
00191   const GRFConfig *c;
00192   uint grf_count = 0;
00193 
00194   for (c = _grfconfig; c != NULL; c = c->next) {
00195     if (!HasBit(c->flags, GCF_STATIC)) grf_count++;
00196   }
00197 
00198   p->Send_uint8 (grf_count);
00199   for (c = _grfconfig; c != NULL; c = c->next) {
00200     if (!HasBit(c->flags, GCF_STATIC)) cs->Send_GRFIdentifier(p, c);
00201   }
00202 
00203   cs->Send_Packet(p);
00204 }
00205 
00206 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_NEED_PASSWORD)(NetworkClientSocket *cs, NetworkPasswordType type)
00207 {
00208   /*
00209    * Packet: SERVER_NEED_PASSWORD
00210    * Function: Indication to the client that the server needs a password
00211    * Data:
00212    *    uint8:  Type of password
00213    */
00214 
00215   /* Invalid packet when status is AUTH or higher */
00216   if (cs->status >= STATUS_AUTH) return;
00217 
00218   cs->status = STATUS_AUTHORIZING;
00219 
00220   Packet *p = NetworkSend_Init(PACKET_SERVER_NEED_PASSWORD);
00221   p->Send_uint8(type);
00222   p->Send_uint32(_settings_game.game_creation.generation_seed);
00223   p->Send_string(_settings_client.network.network_id);
00224   cs->Send_Packet(p);
00225 }
00226 
00227 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WELCOME)
00228 {
00229   /*
00230    * Packet: SERVER_WELCOME
00231    * Function: The client is joined and ready to receive his map
00232    * Data:
00233    *    uint32:  Own Client identifier
00234    */
00235 
00236   Packet *p;
00237   NetworkClientSocket *new_cs;
00238 
00239   /* Invalid packet when status is AUTH or higher */
00240   if (cs->status >= STATUS_AUTH) return;
00241 
00242   cs->status = STATUS_AUTH;
00243   _network_game_info.clients_on++;
00244 
00245   p = NetworkSend_Init(PACKET_SERVER_WELCOME);
00246   p->Send_uint32(cs->client_id);
00247   p->Send_uint32(_settings_game.game_creation.generation_seed);
00248   p->Send_string(_settings_client.network.network_id);
00249   cs->Send_Packet(p);
00250 
00251     /* Transmit info about all the active clients */
00252   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00253     if (new_cs != cs && new_cs->status > STATUS_AUTH)
00254       SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, new_cs->GetInfo());
00255   }
00256   /* Also send the info of the server */
00257   SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER));
00258 }
00259 
00260 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WAIT)
00261 {
00262   /*
00263    * Packet: PACKET_SERVER_WAIT
00264    * Function: The client can not receive the map at the moment because
00265    *             someone else is already receiving the map
00266    * Data:
00267    *    uint8:  Clients awaiting map
00268    */
00269   int waiting = 0;
00270   NetworkClientSocket *new_cs;
00271   Packet *p;
00272 
00273   /* Count how many clients are waiting in the queue */
00274   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00275     if (new_cs->status == STATUS_MAP_WAIT) waiting++;
00276   }
00277 
00278   p = NetworkSend_Init(PACKET_SERVER_WAIT);
00279   p->Send_uint8(waiting);
00280   cs->Send_Packet(p);
00281 }
00282 
00283 /* This sends the map to the client */
00284 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_MAP)
00285 {
00286   /*
00287    * Packet: SERVER_MAP
00288    * Function: Sends the map to the client, or a part of it (it is splitted in
00289    *   a lot of multiple packets)
00290    * Data:
00291    *    uint8:  packet-type (MAP_PACKET_START, MAP_PACKET_NORMAL and MAP_PACKET_END)
00292    *  if MAP_PACKET_START:
00293    *    uint32: The current FrameCounter
00294    *  if MAP_PACKET_NORMAL:
00295    *    piece of the map (till max-size of packet)
00296    *  if MAP_PACKET_END:
00297    *    nothing
00298    */
00299 
00300   static FILE *file_pointer;
00301   static uint sent_packets; // How many packets we did send succecfully last time
00302 
00303   if (cs->status < STATUS_AUTH) {
00304     /* Illegal call, return error and ignore the packet */
00305     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);
00306     return;
00307   }
00308 
00309   if (cs->status == STATUS_AUTH) {
00310     const char *filename = "network_server.tmp";
00311     Packet *p;
00312 
00313     /* Make a dump of the current game */
00314     if (SaveOrLoad(filename, SL_SAVE, AUTOSAVE_DIR) != SL_OK) usererror("network savedump failed");
00315 
00316     file_pointer = FioFOpenFile(filename, "rb", AUTOSAVE_DIR);
00317     fseek(file_pointer, 0, SEEK_END);
00318 
00319     if (ftell(file_pointer) == 0) usererror("network savedump failed - zero sized savegame?");
00320 
00321     /* Now send the _frame_counter and how many packets are coming */
00322     p = NetworkSend_Init(PACKET_SERVER_MAP);
00323     p->Send_uint8 (MAP_PACKET_START);
00324     p->Send_uint32(_frame_counter);
00325     p->Send_uint32(ftell(file_pointer));
00326     cs->Send_Packet(p);
00327 
00328     fseek(file_pointer, 0, SEEK_SET);
00329 
00330     sent_packets = 4; // We start with trying 4 packets
00331 
00332     cs->status = STATUS_MAP;
00333     /* Mark the start of download */
00334     cs->last_frame = _frame_counter;
00335     cs->last_frame_server = _frame_counter;
00336   }
00337 
00338   if (cs->status == STATUS_MAP) {
00339     uint i;
00340     int res;
00341     for (i = 0; i < sent_packets; i++) {
00342       Packet *p = NetworkSend_Init(PACKET_SERVER_MAP);
00343       p->Send_uint8(MAP_PACKET_NORMAL);
00344       res = (int)fread(p->buffer + p->size, 1, SEND_MTU - p->size, file_pointer);
00345 
00346       if (ferror(file_pointer)) usererror("Error reading temporary network savegame!");
00347 
00348       p->size += res;
00349       cs->Send_Packet(p);
00350       if (feof(file_pointer)) {
00351         /* Done reading! */
00352         Packet *p = NetworkSend_Init(PACKET_SERVER_MAP);
00353         p->Send_uint8(MAP_PACKET_END);
00354         cs->Send_Packet(p);
00355 
00356         /* Set the status to DONE_MAP, no we will wait for the client
00357          *  to send it is ready (maybe that happens like never ;)) */
00358         cs->status = STATUS_DONE_MAP;
00359         fclose(file_pointer);
00360 
00361         {
00362           NetworkClientSocket *new_cs;
00363           bool new_map_client = false;
00364           /* Check if there is a client waiting for receiving the map
00365            *  and start sending him the map */
00366           FOR_ALL_CLIENT_SOCKETS(new_cs) {
00367             if (new_cs->status == STATUS_MAP_WAIT) {
00368               /* Check if we already have a new client to send the map to */
00369               if (!new_map_client) {
00370                 /* If not, this client will get the map */
00371                 new_cs->status = STATUS_AUTH;
00372                 new_map_client = true;
00373                 SEND_COMMAND(PACKET_SERVER_MAP)(new_cs);
00374               } else {
00375                 /* Else, send the other clients how many clients are in front of them */
00376                 SEND_COMMAND(PACKET_SERVER_WAIT)(new_cs);
00377               }
00378             }
00379           }
00380         }
00381 
00382         /* There is no more data, so break the for */
00383         break;
00384       }
00385     }
00386 
00387     /* Send all packets (forced) and check if we have send it all */
00388     cs->Send_Packets();
00389     if (cs->IsPacketQueueEmpty()) {
00390       /* All are sent, increase the sent_packets */
00391       sent_packets *= 2;
00392     } else {
00393       /* Not everything is sent, decrease the sent_packets */
00394       if (sent_packets > 1) sent_packets /= 2;
00395     }
00396   }
00397 }
00398 
00399 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_JOIN)(NetworkClientSocket *cs, ClientID client_id)
00400 {
00401   /*
00402    * Packet: SERVER_JOIN
00403    * Function: A client is joined (all active clients receive this after a
00404    *     PACKET_CLIENT_MAP_OK) Mostly what directly follows is a
00405    *     PACKET_SERVER_CLIENT_INFO
00406    * Data:
00407    *    uint32:  Client-identifier
00408    */
00409 
00410   Packet *p = NetworkSend_Init(PACKET_SERVER_JOIN);
00411 
00412   p->Send_uint32(client_id);
00413 
00414   cs->Send_Packet(p);
00415 }
00416 
00417 
00418 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_FRAME)
00419 {
00420   /*
00421    * Packet: SERVER_FRAME
00422    * Function: Sends the current frame-counter to the client
00423    * Data:
00424    *    uint32: Frame Counter
00425    *    uint32: Frame Counter Max (how far may the client walk before the server?)
00426    *    [uint32: general-seed-1]
00427    *    [uint32: general-seed-2]
00428    *      (last two depends on compile-settings, and are not default settings)
00429    */
00430 
00431   Packet *p = NetworkSend_Init(PACKET_SERVER_FRAME);
00432   p->Send_uint32(_frame_counter);
00433   p->Send_uint32(_frame_counter_max);
00434 #ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME
00435   p->Send_uint32(_sync_seed_1);
00436 #ifdef NETWORK_SEND_DOUBLE_SEED
00437   p->Send_uint32(_sync_seed_2);
00438 #endif
00439 #endif
00440   cs->Send_Packet(p);
00441 }
00442 
00443 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SYNC)
00444 {
00445   /*
00446    * Packet: SERVER_SYNC
00447    * Function: Sends a sync-check to the client
00448    * Data:
00449    *    uint32: Frame Counter
00450    *    uint32: General-seed-1
00451    *    [uint32: general-seed-2]
00452    *      (last one depends on compile-settings, and are not default settings)
00453    */
00454 
00455   Packet *p = NetworkSend_Init(PACKET_SERVER_SYNC);
00456   p->Send_uint32(_frame_counter);
00457   p->Send_uint32(_sync_seed_1);
00458 
00459 #ifdef NETWORK_SEND_DOUBLE_SEED
00460   p->Send_uint32(_sync_seed_2);
00461 #endif
00462   cs->Send_Packet(p);
00463 }
00464 
00465 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_COMMAND)(NetworkClientSocket *cs, const CommandPacket *cp)
00466 {
00467   /*
00468    * Packet: SERVER_COMMAND
00469    * Function: Sends a DoCommand to the client
00470    * Data:
00471    *    uint8:  CompanyID (0..MAX_COMPANIES-1)
00472    *    uint32: CommandID (see command.h)
00473    *    uint32: P1 (free variables used in DoCommand)
00474    *    uint32: P2
00475    *    uint32: Tile
00476    *    string: text
00477    *    uint8:  CallBackID (see callback_table.c)
00478    *    uint32: Frame of execution
00479    */
00480 
00481   Packet *p = NetworkSend_Init(PACKET_SERVER_COMMAND);
00482 
00483   cs->Send_Command(p, cp);
00484   p->Send_uint32(cp->frame);
00485   p->Send_bool  (cp->my_cmd);
00486 
00487   cs->Send_Packet(p);
00488 }
00489 
00490 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHAT)(NetworkClientSocket *cs, NetworkAction action, ClientID client_id, bool self_send, const char *msg, int64 data)
00491 {
00492   /*
00493    * Packet: SERVER_CHAT
00494    * Function: Sends a chat-packet to the client
00495    * Data:
00496    *    uint8:  ActionID (see network_data.h, NetworkAction)
00497    *    uint32: Client-identifier
00498    *    String: Message (max NETWORK_CHAT_LENGTH)
00499    *    uint64: Arbitrary data
00500    */
00501 
00502   Packet *p = NetworkSend_Init(PACKET_SERVER_CHAT);
00503 
00504   p->Send_uint8 (action);
00505   p->Send_uint32(client_id);
00506   p->Send_bool  (self_send);
00507   p->Send_string(msg);
00508   p->Send_uint64(data);
00509 
00510   cs->Send_Packet(p);
00511 }
00512 
00513 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR_QUIT)(NetworkClientSocket *cs, ClientID client_id, NetworkErrorCode errorno)
00514 {
00515   /*
00516    * Packet: SERVER_ERROR_QUIT
00517    * Function: One of the clients made an error and is quiting the game
00518    *      This packet informs the other clients of that.
00519    * Data:
00520    *    uint32:  Client-identifier
00521    *    uint8:  ErrorID (see network_data.h, NetworkErrorCode)
00522    */
00523 
00524   Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR_QUIT);
00525 
00526   p->Send_uint32(client_id);
00527   p->Send_uint8 (errorno);
00528 
00529   cs->Send_Packet(p);
00530 }
00531 
00532 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_QUIT)(NetworkClientSocket *cs, ClientID client_id)
00533 {
00534   /*
00535    * Packet: SERVER_ERROR_QUIT
00536    * Function: A client left the game, and this packets informs the other clients
00537    *      of that.
00538    * Data:
00539    *    uint32:  Client-identifier
00540    */
00541 
00542   Packet *p = NetworkSend_Init(PACKET_SERVER_QUIT);
00543 
00544   p->Send_uint32(client_id);
00545 
00546   cs->Send_Packet(p);
00547 }
00548 
00549 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SHUTDOWN)
00550 {
00551   /*
00552    * Packet: SERVER_SHUTDOWN
00553    * Function: Let the clients know that the server is closing
00554    * Data:
00555    *     <none>
00556    */
00557 
00558   Packet *p = NetworkSend_Init(PACKET_SERVER_SHUTDOWN);
00559   cs->Send_Packet(p);
00560 }
00561 
00562 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_NEWGAME)
00563 {
00564   /*
00565    * Packet: PACKET_SERVER_NEWGAME
00566    * Function: Let the clients know that the server is loading a new map
00567    * Data:
00568    *     <none>
00569    */
00570 
00571   Packet *p = NetworkSend_Init(PACKET_SERVER_NEWGAME);
00572   cs->Send_Packet(p);
00573 }
00574 
00575 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_RCON)(NetworkClientSocket *cs, uint16 colour, const char *command)
00576 {
00577   Packet *p = NetworkSend_Init(PACKET_SERVER_RCON);
00578 
00579   p->Send_uint16(colour);
00580   p->Send_string(command);
00581   cs->Send_Packet(p);
00582 }
00583 
00584 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_MOVE)(NetworkClientSocket *cs, ClientID client_id, CompanyID company_id)
00585 {
00586   Packet *p = NetworkSend_Init(PACKET_SERVER_MOVE);
00587 
00588   p->Send_uint32(client_id);
00589   p->Send_uint8(company_id);
00590   cs->Send_Packet(p);
00591 }
00592 
00593 DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_COMPANY_UPDATE)(NetworkClientSocket *cs)
00594 {
00595   Packet *p = NetworkSend_Init(PACKET_SERVER_COMPANY_UPDATE);
00596 
00597   p->Send_uint16(_network_company_passworded);
00598   cs->Send_Packet(p);
00599 }
00600 
00601 DEF_SERVER_SEND_COMMAND(PACKET_SERVER_CONFIG_UPDATE)
00602 {
00603   Packet *p = NetworkSend_Init(PACKET_SERVER_CONFIG_UPDATE);
00604 
00605   p->Send_uint8(_settings_client.network.max_companies);
00606   p->Send_uint8(_settings_client.network.max_spectators);
00607   cs->Send_Packet(p);
00608 }
00609 
00610 /***********
00611  * Receiving functions
00612  *   DEF_SERVER_RECEIVE_COMMAND has parameter: NetworkClientSocket *cs, Packet *p
00613  ************/
00614 
00615 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_COMPANY_INFO)
00616 {
00617   SEND_COMMAND(PACKET_SERVER_COMPANY_INFO)(cs);
00618 }
00619 
00620 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)
00621 {
00622   if (cs->status != STATUS_INACTIVE) {
00623     /* Illegal call, return error and ignore the packet */
00624     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00625     return;
00626   }
00627 
00628   NetworkClientInfo *ci = cs->GetInfo();
00629 
00630   /* We now want a password from the client else we do not allow him in! */
00631   if (!StrEmpty(_settings_client.network.server_password)) {
00632     SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_GAME_PASSWORD);
00633   } else {
00634     if (IsValidCompanyID(ci->client_playas) && !StrEmpty(_network_company_states[ci->client_playas].password)) {
00635       SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_COMPANY_PASSWORD);
00636     } else {
00637       SEND_COMMAND(PACKET_SERVER_WELCOME)(cs);
00638     }
00639   }
00640 }
00641 
00642 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_JOIN)
00643 {
00644   if (cs->status != STATUS_INACTIVE) {
00645     /* Illegal call, return error and ignore the packet */
00646     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00647     return;
00648   }
00649 
00650   char name[NETWORK_CLIENT_NAME_LENGTH];
00651   char unique_id[NETWORK_UNIQUE_ID_LENGTH];
00652   NetworkClientInfo *ci;
00653   CompanyID playas;
00654   NetworkLanguage client_lang;
00655   char client_revision[NETWORK_REVISION_LENGTH];
00656 
00657   p->Recv_string(client_revision, sizeof(client_revision));
00658 
00659   /* Check if the client has revision control enabled */
00660   if (!IsNetworkCompatibleVersion(client_revision)) {
00661     /* Different revisions!! */
00662     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_REVISION);
00663     return;
00664   }
00665 
00666   p->Recv_string(name, sizeof(name));
00667   playas = (Owner)p->Recv_uint8();
00668   client_lang = (NetworkLanguage)p->Recv_uint8();
00669   p->Recv_string(unique_id, sizeof(unique_id));
00670 
00671   if (cs->has_quit) return;
00672 
00673   /* join another company does not affect these values */
00674   switch (playas) {
00675     case COMPANY_NEW_COMPANY: // New company
00676       if (ActiveCompanyCount() >= _settings_client.network.max_companies) {
00677         SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_FULL);
00678         return;
00679       }
00680       break;
00681     case COMPANY_SPECTATOR: // Spectator
00682       if (NetworkSpectatorCount() >= _settings_client.network.max_spectators) {
00683         SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_FULL);
00684         return;
00685       }
00686       break;
00687     default: // Join another company (companies 1-8 (index 0-7))
00688       if (!IsValidCompanyID(playas) || !IsHumanCompany(playas)) {
00689         SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_COMPANY_MISMATCH);
00690         return;
00691       }
00692       break;
00693   }
00694 
00695   /* We need a valid name.. make it Player */
00696   if (StrEmpty(name)) strecpy(name, "Player", lastof(name));
00697 
00698   if (!NetworkFindName(name)) { // Change name if duplicate
00699     /* We could not create a name for this client */
00700     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NAME_IN_USE);
00701     return;
00702   }
00703 
00704   ci = cs->GetInfo();
00705 
00706   strecpy(ci->client_name, name, lastof(ci->client_name));
00707   strecpy(ci->unique_id, unique_id, lastof(ci->unique_id));
00708   ci->client_playas = playas;
00709   ci->client_lang = client_lang;
00710 
00711   /* Make sure companies to which people try to join are not autocleaned */
00712   if (IsValidCompanyID(playas)) _network_company_states[playas].months_empty = 0;
00713 
00714   if (_grfconfig == NULL) {
00715     RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)(cs, NULL);
00716   } else {
00717     SEND_COMMAND(PACKET_SERVER_CHECK_NEWGRFS)(cs);
00718   }
00719 }
00720 
00721 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_PASSWORD)
00722 {
00723   NetworkPasswordType type;
00724   char password[NETWORK_PASSWORD_LENGTH];
00725   const NetworkClientInfo *ci;
00726 
00727   type = (NetworkPasswordType)p->Recv_uint8();
00728   p->Recv_string(password, sizeof(password));
00729 
00730   if (cs->status == STATUS_AUTHORIZING && type == NETWORK_GAME_PASSWORD) {
00731     /* Check game-password */
00732     if (strcmp(password, _settings_client.network.server_password) != 0) {
00733       /* Password is invalid */
00734       SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_PASSWORD);
00735       return;
00736     }
00737 
00738     ci = cs->GetInfo();
00739 
00740     if (IsValidCompanyID(ci->client_playas) && !StrEmpty(_network_company_states[ci->client_playas].password)) {
00741       SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_COMPANY_PASSWORD);
00742       return;
00743     }
00744 
00745     /* Valid password, allow user */
00746     SEND_COMMAND(PACKET_SERVER_WELCOME)(cs);
00747     return;
00748   } else if (cs->status == STATUS_AUTHORIZING && type == NETWORK_COMPANY_PASSWORD) {
00749     ci = cs->GetInfo();
00750 
00751     if (strcmp(password, _network_company_states[ci->client_playas].password) != 0) {
00752       /* Password is invalid */
00753       SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_PASSWORD);
00754       return;
00755     }
00756 
00757     SEND_COMMAND(PACKET_SERVER_WELCOME)(cs);
00758     return;
00759   }
00760 
00761 
00762   SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00763   return;
00764 }
00765 
00766 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_GETMAP)
00767 {
00768   NetworkClientSocket *new_cs;
00769 
00770   /* The client was never joined.. so this is impossible, right?
00771    *  Ignore the packet, give the client a warning, and close his connection */
00772   if (cs->status < STATUS_AUTH || cs->has_quit) {
00773     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);
00774     return;
00775   }
00776 
00777   /* Check if someone else is receiving the map */
00778   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00779     if (new_cs->status == STATUS_MAP) {
00780       /* Tell the new client to wait */
00781       cs->status = STATUS_MAP_WAIT;
00782       SEND_COMMAND(PACKET_SERVER_WAIT)(cs);
00783       return;
00784     }
00785   }
00786 
00787   /* We receive a request to upload the map.. give it to the client! */
00788   SEND_COMMAND(PACKET_SERVER_MAP)(cs);
00789 }
00790 
00791 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_MAP_OK)
00792 {
00793   /* Client has the map, now start syncing */
00794   if (cs->status == STATUS_DONE_MAP && !cs->has_quit) {
00795     char client_name[NETWORK_CLIENT_NAME_LENGTH];
00796     NetworkClientSocket *new_cs;
00797 
00798     NetworkGetClientName(client_name, sizeof(client_name), cs);
00799 
00800     NetworkTextMessage(NETWORK_ACTION_JOIN, CC_DEFAULT, false, client_name);
00801 
00802     /* Mark the client as pre-active, and wait for an ACK
00803      *  so we know he is done loading and in sync with us */
00804     cs->status = STATUS_PRE_ACTIVE;
00805     NetworkHandleCommandQueue(cs);
00806     SEND_COMMAND(PACKET_SERVER_FRAME)(cs);
00807     SEND_COMMAND(PACKET_SERVER_SYNC)(cs);
00808 
00809     /* This is the frame the client receives
00810      *  we need it later on to make sure the client is not too slow */
00811     cs->last_frame = _frame_counter;
00812     cs->last_frame_server = _frame_counter;
00813 
00814     FOR_ALL_CLIENT_SOCKETS(new_cs) {
00815       if (new_cs->status > STATUS_AUTH) {
00816         SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(new_cs, cs->GetInfo());
00817         SEND_COMMAND(PACKET_SERVER_JOIN)(new_cs, cs->client_id);
00818       }
00819     }
00820 
00821     if (_settings_client.network.pause_on_join) {
00822       /* Now pause the game till the client is in sync */
00823       DoCommandP(0, 1, 0, CMD_PAUSE);
00824 
00825       NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_BROADCAST, 0, "", CLIENT_ID_SERVER, NETWORK_SERVER_MESSAGE_GAME_PAUSED_CONNECT);
00826     }
00827 
00828     /* also update the new client with our max values */
00829     SEND_COMMAND(PACKET_SERVER_CONFIG_UPDATE)(cs);
00830 
00831     /* quickly update the syncing client with company details */
00832     SEND_COMMAND(PACKET_SERVER_COMPANY_UPDATE)(cs);
00833   } else {
00834     /* Wrong status for this packet, give a warning to client, and close connection */
00835     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00836   }
00837 }
00838 
00843 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_COMMAND)
00844 {
00845   NetworkClientSocket *new_cs;
00846 
00847   /* The client was never joined.. so this is impossible, right?
00848    *  Ignore the packet, give the client a warning, and close his connection */
00849   if (cs->status < STATUS_DONE_MAP || cs->has_quit) {
00850     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00851     return;
00852   }
00853 
00854   CommandPacket cp;
00855   const char *err = cs->Recv_Command(p, &cp);
00856 
00857   if (cs->has_quit) return;
00858 
00859   const NetworkClientInfo *ci = cs->GetInfo();
00860 
00861   if (err != NULL) {
00862     IConsolePrintF(CC_ERROR, "WARNING: %s from client %d (IP: %s).", err, ci->client_id, GetClientIP(ci));
00863     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
00864     return;
00865   }
00866 
00867 
00868   if (GetCommandFlags(cp.cmd) & CMD_SERVER && ci->client_id != CLIENT_ID_SERVER) {
00869     IConsolePrintF(CC_ERROR, "WARNING: server only command from client %d (IP: %s), kicking...", ci->client_id, GetClientIP(ci));
00870     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_KICKED);
00871     return;
00872   }
00873 
00874   if ((GetCommandFlags(cp.cmd) & CMD_SPECTATOR) == 0 && !IsValidCompanyID(cp.company) && ci->client_id != CLIENT_ID_SERVER) {
00875     IConsolePrintF(CC_ERROR, "WARNING: spectator issueing command from client %d (IP: %s), kicking...", ci->client_id, GetClientIP(ci));
00876     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_KICKED);
00877     return;
00878   }
00879 
00884   if (!(cp.cmd == CMD_COMPANY_CTRL && cp.p1 == 0 && ci->client_playas == COMPANY_NEW_COMPANY) && ci->client_playas != cp.company) {
00885     IConsolePrintF(CC_ERROR, "WARNING: client %d (IP: %s) tried to execute a command as company %d, kicking...",
00886                    ci->client_playas + 1, GetClientIP(ci), cp.company + 1);
00887     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_COMPANY_MISMATCH);
00888     return;
00889   }
00890 
00896   if (cp.cmd == CMD_COMPANY_CTRL) {
00897     if (cp.p1 != 0) {
00898       SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_CHEATER);
00899       return;
00900     }
00901 
00902     /* 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! */
00903     if (ActiveCompanyCount() >= _settings_client.network.max_companies) {
00904       NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_CLIENT, ci->client_id, "cannot create new company, server full", CLIENT_ID_SERVER);
00905       return;
00906     }
00907 
00908     /* XXX - Execute the command as a valid company. Normally this would be done by a
00909      * spectator, but that is not allowed any commands. So do an impersonation. The drawback
00910      * of this is that the first company's last_built_tile is also updated... */
00911     cp.company = OWNER_BEGIN;
00912     cp.p2 = cs->client_id;
00913   }
00914 
00915   /* The frame can be executed in the same frame as the next frame-packet
00916    *  That frame just before that frame is saved in _frame_counter_max */
00917   cp.frame = _frame_counter_max + 1;
00918   cp.next  = NULL;
00919 
00920   CommandCallback *callback = cp.callback;
00921 
00922   /* Queue the command for the clients (are send at the end of the frame
00923    *   if they can handle it ;)) */
00924   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00925     if (new_cs->status >= STATUS_MAP) {
00926       /* Callbacks are only send back to the client who sent them in the
00927        *  first place. This filters that out. */
00928       cp.callback = (new_cs != cs) ? NULL : callback;
00929       cp.my_cmd = (new_cs == cs);
00930       NetworkAddCommandQueue(cp, new_cs);
00931     }
00932   }
00933 
00934   cp.callback = NULL;
00935   cp.my_cmd = false;
00936   NetworkAddCommandQueue(cp);
00937 }
00938 
00939 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_ERROR)
00940 {
00941   /* This packets means a client noticed an error and is reporting this
00942    *  to us. Display the error and report it to the other clients */
00943   NetworkClientSocket *new_cs;
00944   char str[100];
00945   char client_name[NETWORK_CLIENT_NAME_LENGTH];
00946   NetworkErrorCode errorno = (NetworkErrorCode)p->Recv_uint8();
00947 
00948   /* The client was never joined.. thank the client for the packet, but ignore it */
00949   if (cs->status < STATUS_DONE_MAP || cs->has_quit) {
00950     cs->has_quit = true;
00951     return;
00952   }
00953 
00954   NetworkGetClientName(client_name, sizeof(client_name), cs);
00955 
00956   StringID strid = GetNetworkErrorMsg(errorno);
00957   GetString(str, strid, lastof(str));
00958 
00959   DEBUG(net, 2, "'%s' reported an error and is closing its connection (%s)", client_name, str);
00960 
00961   NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, strid);
00962 
00963   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00964     if (new_cs->status > STATUS_AUTH) {
00965       SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->client_id, errorno);
00966     }
00967   }
00968 
00969   cs->has_quit = true;
00970 }
00971 
00972 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_QUIT)
00973 {
00974   /* The client wants to leave. Display this and report it to the other
00975    *  clients. */
00976   NetworkClientSocket *new_cs;
00977   char client_name[NETWORK_CLIENT_NAME_LENGTH];
00978 
00979   /* The client was never joined.. thank the client for the packet, but ignore it */
00980   if (cs->status < STATUS_DONE_MAP || cs->has_quit) {
00981     cs->has_quit = true;
00982     return;
00983   }
00984 
00985   NetworkGetClientName(client_name, sizeof(client_name), cs);
00986 
00987   NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, NULL, STR_NETWORK_CLIENT_LEAVING);
00988 
00989   FOR_ALL_CLIENT_SOCKETS(new_cs) {
00990     if (new_cs->status > STATUS_AUTH) {
00991       SEND_COMMAND(PACKET_SERVER_QUIT)(new_cs, cs->client_id);
00992     }
00993   }
00994 
00995   cs->has_quit = true;
00996 }
00997 
00998 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_ACK)
00999 {
01000   if (cs->status < STATUS_AUTH) {
01001     /* Illegal call, return error and ignore the packet */
01002     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);
01003     return;
01004   }
01005 
01006   uint32 frame = p->Recv_uint32();
01007 
01008   /* The client is trying to catch up with the server */
01009   if (cs->status == STATUS_PRE_ACTIVE) {
01010     /* The client is not yet catched up? */
01011     if (frame + DAY_TICKS < _frame_counter) return;
01012 
01013     /* Now he is! Unpause the game */
01014     cs->status = STATUS_ACTIVE;
01015 
01016     if (_settings_client.network.pause_on_join) {
01017       DoCommandP(0, 0, 0, CMD_PAUSE);
01018       NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_BROADCAST, 0, "", CLIENT_ID_SERVER, NETWORK_SERVER_MESSAGE_GAME_UNPAUSED_CONNECT);
01019     }
01020 
01021     /* Execute script for, e.g. MOTD */
01022     IConsoleCmdExec("exec scripts/on_server_connect.scr 0");
01023   }
01024 
01025   /* The client received the frame, make note of it */
01026   cs->last_frame = frame;
01027   /* With those 2 values we can calculate the lag realtime */
01028   cs->last_frame_server = _frame_counter;
01029 }
01030 
01031 
01032 
01033 void NetworkServerSendChat(NetworkAction action, DestType desttype, int dest, const char *msg, ClientID from_id, int64 data)
01034 {
01035   NetworkClientSocket *cs;
01036   const NetworkClientInfo *ci, *ci_own, *ci_to;
01037 
01038   switch (desttype) {
01039   case DESTTYPE_CLIENT:
01040     /* Are we sending to the server? */
01041     if ((ClientID)dest == CLIENT_ID_SERVER) {
01042       ci = NetworkFindClientInfoFromClientID(from_id);
01043       /* Display the text locally, and that is it */
01044       if (ci != NULL)
01045         NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
01046     } else {
01047       /* Else find the client to send the message to */
01048       FOR_ALL_CLIENT_SOCKETS(cs) {
01049         if (cs->client_id == (ClientID)dest) {
01050           SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_id, false, msg, data);
01051           break;
01052         }
01053       }
01054     }
01055 
01056     /* Display the message locally (so you know you have sent it) */
01057     if (from_id != (ClientID)dest) {
01058       if (from_id == CLIENT_ID_SERVER) {
01059         ci = NetworkFindClientInfoFromClientID(from_id);
01060         ci_to = NetworkFindClientInfoFromClientID((ClientID)dest);
01061         if (ci != NULL && ci_to != NULL)
01062           NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), true, ci_to->client_name, msg, data);
01063       } else {
01064         FOR_ALL_CLIENT_SOCKETS(cs) {
01065           if (cs->client_id == from_id) {
01066             SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, (ClientID)dest, true, msg, data);
01067             break;
01068           }
01069         }
01070       }
01071     }
01072     break;
01073   case DESTTYPE_TEAM: {
01074     bool show_local = true; // If this is false, the message is already displayed
01075                             /* on the client who did sent it.
01076      * Find all clients that belong to this company */
01077     ci_to = NULL;
01078     FOR_ALL_CLIENT_SOCKETS(cs) {
01079       ci = cs->GetInfo();
01080       if (ci->client_playas == (CompanyID)dest) {
01081         SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_id, false, msg, data);
01082         if (cs->client_id == from_id) show_local = false;
01083         ci_to = ci; // Remember a client that is in the company for company-name
01084       }
01085     }
01086 
01087     ci = NetworkFindClientInfoFromClientID(from_id);
01088     ci_own = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
01089     if (ci != NULL && ci_own != NULL && ci_own->client_playas == dest) {
01090       NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
01091       if (from_id == CLIENT_ID_SERVER) show_local = false;
01092       ci_to = ci_own;
01093     }
01094 
01095     /* There is no such client */
01096     if (ci_to == NULL) break;
01097 
01098     /* Display the message locally (so you know you have sent it) */
01099     if (ci != NULL && show_local) {
01100       if (from_id == CLIENT_ID_SERVER) {
01101         char name[NETWORK_NAME_LENGTH];
01102         StringID str = IsValidCompanyID(ci_to->client_playas) ? STR_COMPANY_NAME : STR_NETWORK_SPECTATORS;
01103         SetDParam(0, ci_to->client_playas);
01104         GetString(name, str, lastof(name));
01105         NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci_own->client_playas), true, name, msg, data);
01106       } else {
01107         FOR_ALL_CLIENT_SOCKETS(cs) {
01108           if (cs->client_id == from_id) {
01109             SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, ci_to->client_id, true, msg, data);
01110           }
01111         }
01112       }
01113     }
01114     }
01115     break;
01116   default:
01117     DEBUG(net, 0, "[server] received unknown chat destination type %d. Doing broadcast instead", desttype);
01118     /* fall-through to next case */
01119   case DESTTYPE_BROADCAST:
01120     FOR_ALL_CLIENT_SOCKETS(cs) {
01121       SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_id, false, msg, data);
01122     }
01123     ci = NetworkFindClientInfoFromClientID(from_id);
01124     if (ci != NULL)
01125       NetworkTextMessage(action, (ConsoleColour)GetDrawStringCompanyColour(ci->client_playas), false, ci->client_name, msg, data);
01126     break;
01127   }
01128 }
01129 
01130 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_CHAT)
01131 {
01132   if (cs->status < STATUS_AUTH) {
01133     /* Illegal call, return error and ignore the packet */
01134     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);
01135     return;
01136   }
01137 
01138   NetworkAction action = (NetworkAction)p->Recv_uint8();
01139   DestType desttype = (DestType)p->Recv_uint8();
01140   int dest = p->Recv_uint32();
01141   char msg[NETWORK_CHAT_LENGTH];
01142 
01143   p->Recv_string(msg, NETWORK_CHAT_LENGTH);
01144   int64 data = p->Recv_uint64();
01145 
01146   const NetworkClientInfo *ci = cs->GetInfo();
01147   switch (action) {
01148     case NETWORK_ACTION_GIVE_MONEY:
01149       if (!IsValidCompanyID(ci->client_playas)) break;
01150       /* Fall-through */
01151     case NETWORK_ACTION_CHAT:
01152     case NETWORK_ACTION_CHAT_CLIENT:
01153     case NETWORK_ACTION_CHAT_COMPANY:
01154       NetworkServerSendChat(action, desttype, dest, msg, cs->client_id, data);
01155       break;
01156     default:
01157       IConsolePrintF(CC_ERROR, "WARNING: invalid chat action from client %d (IP: %s).", ci->client_id, GetClientIP(ci));
01158       SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
01159       break;
01160   }
01161 }
01162 
01163 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_SET_PASSWORD)
01164 {
01165   if (cs->status != STATUS_ACTIVE) {
01166     /* Illegal call, return error and ignore the packet */
01167     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
01168     return;
01169   }
01170 
01171   char password[NETWORK_PASSWORD_LENGTH];
01172   const NetworkClientInfo *ci;
01173 
01174   p->Recv_string(password, sizeof(password));
01175   ci = cs->GetInfo();
01176 
01177   if (IsValidCompanyID(ci->client_playas)) {
01178     strecpy(_network_company_states[ci->client_playas].password, password, lastof(_network_company_states[ci->client_playas].password));
01179     NetworkServerUpdateCompanyPassworded(ci->client_playas, !StrEmpty(_network_company_states[ci->client_playas].password));
01180   }
01181 }
01182 
01183 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_SET_NAME)
01184 {
01185   if (cs->status != STATUS_ACTIVE) {
01186     /* Illegal call, return error and ignore the packet */
01187     SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED);
01188     return;
01189   }
01190 
01191   char client_name[NETWORK_CLIENT_NAME_LENGTH];
01192   NetworkClientInfo *ci;
01193 
01194   p->Recv_string(client_name, sizeof(client_name));
01195   ci = cs->GetInfo();
01196 
01197   if (cs->has_quit) return;
01198 
01199   if (ci != NULL) {
01200     /* Display change */
01201     if (NetworkFindName(client_name)) {
01202       NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, client_name);
01203       strecpy(ci->client_name, client_name, lastof(ci->client_name));
01204       NetworkUpdateClientInfo(ci->client_id);
01205     }
01206   }
01207 }
01208 
01209 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_RCON)
01210 {
01211   char pass[NETWORK_PASSWORD_LENGTH];
01212   char command[NETWORK_RCONCOMMAND_LENGTH];
01213 
01214   if (StrEmpty(_settings_client.network.rcon_password)) return;
01215 
01216   p->Recv_string(pass, sizeof(pass));
01217   p->Recv_string(command, sizeof(command));
01218 
01219   if (strcmp(pass, _settings_client.network.rcon_password) != 0) {
01220     DEBUG(net, 0, "[rcon] wrong password from client-id %d", cs->client_id);
01221     return;
01222   }
01223 
01224   DEBUG(net, 0, "[rcon] client-id %d executed: '%s'", cs->client_id, command);
01225 
01226   _redirect_console_to_client = cs->client_id;
01227   IConsoleCmdExec(command);
01228   _redirect_console_to_client = INVALID_CLIENT_ID;
01229   return;
01230 }
01231 
01232 DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_MOVE)
01233 {
01234   CompanyID company_id = (Owner)p->Recv_uint8();
01235 
01236   /* Check if the company is valid */
01237   if (!IsValidCompanyID(company_id) && company_id != COMPANY_SPECTATOR) return;
01238   /* We don't allow moving to AI companies */
01239   if (company_id != COMPANY_SPECTATOR && GetCompany(company_id)->is_ai) return;
01240 
01241   /* Check if we require a password for this company */
01242   if (company_id != COMPANY_SPECTATOR && !StrEmpty(_network_company_states[company_id].password)) {
01243     /* we need a password from the client - should be in this packet */
01244     char password[NETWORK_PASSWORD_LENGTH];
01245     p->Recv_string(password, sizeof(password));
01246 
01247     /* Incorrect password sent, return! */
01248     if (strcmp(password, _network_company_states[company_id].password) != 0) {
01249       DEBUG(net, 2, "[move] wrong password from client-id #%d for company #%d", cs->client_id, company_id + 1);
01250       return;
01251     }
01252   }
01253 
01254   /* if we get here we can move the client */
01255   NetworkServerDoMove(cs->client_id, company_id);
01256 }
01257 
01258 /* The layout for the receive-functions by the server */
01259 typedef void NetworkServerPacket(NetworkClientSocket *cs, Packet *p);
01260 
01261 
01262 /* This array matches PacketType. At an incoming
01263  *  packet it is matches against this array
01264  *  and that way the right function to handle that
01265  *  packet is found. */
01266 static NetworkServerPacket * const _network_server_packet[] = {
01267   NULL, // PACKET_SERVER_FULL,
01268   NULL, // PACKET_SERVER_BANNED,
01269   RECEIVE_COMMAND(PACKET_CLIENT_JOIN),
01270   NULL, // PACKET_SERVER_ERROR,
01271   RECEIVE_COMMAND(PACKET_CLIENT_COMPANY_INFO),
01272   NULL, // PACKET_SERVER_COMPANY_INFO,
01273   NULL, // PACKET_SERVER_CLIENT_INFO,
01274   NULL, // PACKET_SERVER_NEED_PASSWORD,
01275   RECEIVE_COMMAND(PACKET_CLIENT_PASSWORD),
01276   NULL, // PACKET_SERVER_WELCOME,
01277   RECEIVE_COMMAND(PACKET_CLIENT_GETMAP),
01278   NULL, // PACKET_SERVER_WAIT,
01279   NULL, // PACKET_SERVER_MAP,
01280   RECEIVE_COMMAND(PACKET_CLIENT_MAP_OK),
01281   NULL, // PACKET_SERVER_JOIN,
01282   NULL, // PACKET_SERVER_FRAME,
01283   NULL, // PACKET_SERVER_SYNC,
01284   RECEIVE_COMMAND(PACKET_CLIENT_ACK),
01285   RECEIVE_COMMAND(PACKET_CLIENT_COMMAND),
01286   NULL, // PACKET_SERVER_COMMAND,
01287   RECEIVE_COMMAND(PACKET_CLIENT_CHAT),
01288   NULL, // PACKET_SERVER_CHAT,
01289   RECEIVE_COMMAND(PACKET_CLIENT_SET_PASSWORD),
01290   RECEIVE_COMMAND(PACKET_CLIENT_SET_NAME),
01291   RECEIVE_COMMAND(PACKET_CLIENT_QUIT),
01292   RECEIVE_COMMAND(PACKET_CLIENT_ERROR),
01293   NULL, // PACKET_SERVER_QUIT,
01294   NULL, // PACKET_SERVER_ERROR_QUIT,
01295   NULL, // PACKET_SERVER_SHUTDOWN,
01296   NULL, // PACKET_SERVER_NEWGAME,
01297   NULL, // PACKET_SERVER_RCON,
01298   RECEIVE_COMMAND(PACKET_CLIENT_RCON),
01299   NULL, // PACKET_CLIENT_CHECK_NEWGRFS,
01300   RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED),
01301   NULL, // PACKET_SERVER_MOVE,
01302   RECEIVE_COMMAND(PACKET_CLIENT_MOVE),
01303   NULL, // PACKET_SERVER_COMPANY_UPDATE,
01304   NULL, // PACKET_SERVER_CONFIG_UPDATE,
01305 };
01306 
01307 /* If this fails, check the array above with network_data.h */
01308 assert_compile(lengthof(_network_server_packet) == PACKET_END);
01309 
01310 void NetworkSocketHandler::Send_CompanyInformation(Packet *p, const Company *c, const NetworkCompanyStats *stats)
01311 {
01312   /* Grab the company name */
01313   char company_name[NETWORK_COMPANY_NAME_LENGTH];
01314   SetDParam(0, c->index);
01315   GetString(company_name, STR_COMPANY_NAME, lastof(company_name));
01316 
01317   /* Get the income */
01318   Money income = 0;
01319   if (_cur_year - 1 == c->inaugurated_year) {
01320     /* The company is here just 1 year, so display [2], else display[1] */
01321     for (uint i = 0; i < lengthof(c->yearly_expenses[2]); i++) {
01322       income -= c->yearly_expenses[2][i];
01323     }
01324   } else {
01325     for (uint i = 0; i < lengthof(c->yearly_expenses[1]); i++) {
01326       income -= c->yearly_expenses[1][i];
01327     }
01328   }
01329 
01330   /* Send the information */
01331   p->Send_uint8 (c->index);
01332   p->Send_string(company_name);
01333   p->Send_uint32(c->inaugurated_year);
01334   p->Send_uint64(c->old_economy[0].company_value);
01335   p->Send_uint64(c->money);
01336   p->Send_uint64(income);
01337   p->Send_uint16(c->old_economy[0].performance_history);
01338 
01339   /* Send 1 if there is a passord for the company else send 0 */
01340   p->Send_bool  (!StrEmpty(_network_company_states[c->index].password));
01341 
01342   for (int i = 0; i < NETWORK_VEHICLE_TYPES; i++) {
01343     p->Send_uint16(stats->num_vehicle[i]);
01344   }
01345 
01346   for (int i = 0; i < NETWORK_STATION_TYPES; i++) {
01347     p->Send_uint16(stats->num_station[i]);
01348   }
01349 
01350   p->Send_bool(c->is_ai);
01351 }
01352 
01357 void NetworkPopulateCompanyStats(NetworkCompanyStats *stats)
01358 {
01359   const Vehicle *v;
01360   const Station *s;
01361 
01362   memset(stats, 0, sizeof(*stats) * MAX_COMPANIES);
01363 
01364   /* Go through all vehicles and count the type of vehicles */
01365   FOR_ALL_VEHICLES(v) {
01366     if (!IsValidCompanyID(v->owner) || !v->IsPrimaryVehicle()) continue;
01367     byte type = 0;
01368     switch (v->type) {
01369       case VEH_TRAIN: type = 0; break;
01370       case VEH_ROAD: type = (v->cargo_type != CT_PASSENGERS) ? 1 : 2; break;
01371       case VEH_AIRCRAFT: type = 3; break;
01372       case VEH_SHIP: type = 4; break;
01373       default: continue;
01374     }
01375     stats[v->owner].num_vehicle[type]++;
01376   }
01377 
01378   /* Go through all stations and count the types of stations */
01379   FOR_ALL_STATIONS(s) {
01380     if (IsValidCompanyID(s->owner)) {
01381       NetworkCompanyStats *npi = &stats[s->owner];
01382 
01383       if (s->facilities & FACIL_TRAIN)      npi->num_station[0]++;
01384       if (s->facilities & FACIL_TRUCK_STOP) npi->num_station[1]++;
01385       if (s->facilities & FACIL_BUS_STOP)   npi->num_station[2]++;
01386       if (s->facilities & FACIL_AIRPORT)    npi->num_station[3]++;
01387       if (s->facilities & FACIL_DOCK)       npi->num_station[4]++;
01388     }
01389   }
01390 }
01391 
01392 /* Send a packet to all clients with updated info about this client_id */
01393 void NetworkUpdateClientInfo(ClientID client_id)
01394 {
01395   NetworkClientSocket *cs;
01396   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
01397 
01398   if (ci == NULL) return;
01399 
01400   FOR_ALL_CLIENT_SOCKETS(cs) {
01401     SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, ci);
01402   }
01403 }
01404 
01405 /* Check if we want to restart the map */
01406 static void NetworkCheckRestartMap()
01407 {
01408   if (_settings_client.network.restart_game_year != 0 && _cur_year >= _settings_client.network.restart_game_year) {
01409     DEBUG(net, 0, "Auto-restarting map. Year %d reached", _cur_year);
01410 
01411     StartNewGameWithoutGUI(GENERATE_NEW_SEED);
01412   }
01413 }
01414 
01415 /* Check if the server has autoclean_companies activated
01416     Two things happen:
01417       1) If a company is not protected, it is closed after 1 year (for example)
01418       2) If a company is protected, protection is disabled after 3 years (for example)
01419            (and item 1. happens a year later) */
01420 static void NetworkAutoCleanCompanies()
01421 {
01422   const NetworkClientInfo *ci;
01423   const Company *c;
01424   bool clients_in_company[MAX_COMPANIES];
01425   int vehicles_in_company[MAX_COMPANIES];
01426 
01427   if (!_settings_client.network.autoclean_companies) return;
01428 
01429   memset(clients_in_company, 0, sizeof(clients_in_company));
01430 
01431   /* Detect the active companies */
01432   FOR_ALL_CLIENT_INFOS(ci) {
01433     if (IsValidCompanyID(ci->client_playas)) clients_in_company[ci->client_playas] = true;
01434   }
01435 
01436   if (!_network_dedicated) {
01437     ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
01438     if (IsValidCompanyID(ci->client_playas)) clients_in_company[ci->client_playas] = true;
01439   }
01440 
01441   if (_settings_client.network.autoclean_novehicles != 0) {
01442     memset(vehicles_in_company, 0, sizeof(vehicles_in_company));
01443 
01444     const Vehicle *v;
01445     FOR_ALL_VEHICLES(v) {
01446       if (!IsValidCompanyID(v->owner) || !v->IsPrimaryVehicle()) continue;
01447       vehicles_in_company[v->owner]++;
01448     }
01449   }
01450 
01451   /* Go through all the comapnies */
01452   FOR_ALL_COMPANIES(c) {
01453     /* Skip the non-active once */
01454     if (c->is_ai) continue;
01455 
01456     if (!clients_in_company[c->index]) {
01457       /* The company is empty for one month more */
01458       _network_company_states[c->index].months_empty++;
01459 
01460       /* Is the company empty for autoclean_unprotected-months, and is there no protection? */
01461       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)) {
01462         /* Shut the company down */
01463         DoCommandP(0, 2, c->index, CMD_COMPANY_CTRL);
01464         IConsolePrintF(CC_DEFAULT, "Auto-cleaned company #%d with no password", c->index + 1);
01465       }
01466       /* Is the company empty for autoclean_protected-months, and there is a protection? */
01467       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)) {
01468         /* Unprotect the company */
01469         _network_company_states[c->index].password[0] = '\0';
01470         IConsolePrintF(CC_DEFAULT, "Auto-removed protection from company #%d", c->index + 1);
01471         _network_company_states[c->index].months_empty = 0;
01472         NetworkServerUpdateCompanyPassworded(c->index, false);
01473       }
01474       /* Is the company empty for autoclean_novehicles-months, and has no vehicles? */
01475       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) {
01476         /* Shut the company down */
01477         DoCommandP(0, 2, c->index, CMD_COMPANY_CTRL);
01478         IConsolePrintF(CC_DEFAULT, "Auto-cleaned company #%d with no vehicles", c->index + 1);
01479       }
01480     } else {
01481       /* It is not empty, reset the date */
01482       _network_company_states[c->index].months_empty = 0;
01483     }
01484   }
01485 }
01486 
01487 /* This function changes new_name to a name that is unique (by adding #1 ...)
01488  *  and it returns true if that succeeded. */
01489 bool NetworkFindName(char new_name[NETWORK_CLIENT_NAME_LENGTH])
01490 {
01491   bool found_name = false;
01492   uint number = 0;
01493   char original_name[NETWORK_CLIENT_NAME_LENGTH];
01494 
01495   /* We use NETWORK_CLIENT_NAME_LENGTH in here, because new_name is really a pointer */
01496   ttd_strlcpy(original_name, new_name, NETWORK_CLIENT_NAME_LENGTH);
01497 
01498   while (!found_name) {
01499     const NetworkClientInfo *ci;
01500 
01501     found_name = true;
01502     FOR_ALL_CLIENT_INFOS(ci) {
01503       if (strcmp(ci->client_name, new_name) == 0) {
01504         /* Name already in use */
01505         found_name = false;
01506         break;
01507       }
01508     }
01509     /* Check if it is the same as the server-name */
01510     ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
01511     if (ci != NULL) {
01512       if (strcmp(ci->client_name, new_name) == 0) found_name = false; // name already in use
01513     }
01514 
01515     if (!found_name) {
01516       /* Try a new name (<name> #1, <name> #2, and so on) */
01517 
01518       /* Something's really wrong when there're more names than clients */
01519       if (number++ > MAX_CLIENTS) break;
01520       snprintf(new_name, NETWORK_CLIENT_NAME_LENGTH, "%s #%d", original_name, number);
01521     }
01522   }
01523 
01524   return found_name;
01525 }
01526 
01533 bool NetworkServerChangeClientName(ClientID client_id, const char *new_name)
01534 {
01535   NetworkClientInfo *ci;
01536   /* Check if the name's already in use */
01537   FOR_ALL_CLIENT_INFOS(ci) {
01538     if (strcmp(ci->client_name, new_name) == 0) return false;
01539   }
01540 
01541   ci = NetworkFindClientInfoFromClientID(client_id);
01542   if (ci == NULL) return false;
01543 
01544   NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, true, ci->client_name, new_name);
01545 
01546   strecpy(ci->client_name, new_name, lastof(ci->client_name));
01547 
01548   NetworkUpdateClientInfo(client_id);
01549   return true;
01550 }
01551 
01552 /* Reads a packet from the stream */
01553 bool NetworkServer_ReadPackets(NetworkClientSocket *cs)
01554 {
01555   Packet *p;
01556   NetworkRecvStatus res;
01557   while ((p = cs->Recv_Packet(&res)) != NULL) {
01558     byte type = p->Recv_uint8();
01559     if (type < PACKET_END && _network_server_packet[type] != NULL && !cs->has_quit) {
01560       _network_server_packet[type](cs, p);
01561     } else {
01562       DEBUG(net, 0, "[server] received invalid packet type %d", type);
01563     }
01564     delete p;
01565   }
01566 
01567   return true;
01568 }
01569 
01570 /* Handle the local command-queue */
01571 static void NetworkHandleCommandQueue(NetworkClientSocket *cs)
01572 {
01573   CommandPacket *cp;
01574 
01575   while ( (cp = cs->command_queue) != NULL) {
01576     SEND_COMMAND(PACKET_SERVER_COMMAND)(cs, cp);
01577 
01578     cs->command_queue = cp->next;
01579     free(cp);
01580   }
01581 }
01582 
01583 /* This is called every tick if this is a _network_server */
01584 void NetworkServer_Tick(bool send_frame)
01585 {
01586   NetworkClientSocket *cs;
01587 #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
01588   bool send_sync = false;
01589 #endif
01590 
01591 #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
01592   if (_frame_counter >= _last_sync_frame + _settings_client.network.sync_freq) {
01593     _last_sync_frame = _frame_counter;
01594     send_sync = true;
01595   }
01596 #endif
01597 
01598   /* Now we are done with the frame, inform the clients that they can
01599    *  do their frame! */
01600   FOR_ALL_CLIENT_SOCKETS(cs) {
01601     /* Check if the speed of the client is what we can expect from a client */
01602     if (cs->status == STATUS_ACTIVE) {
01603       /* 1 lag-point per day */
01604       int lag = NetworkCalculateLag(cs) / DAY_TICKS;
01605       if (lag > 0) {
01606         if (lag > 3) {
01607           /* Client did still not report in after 4 game-day, drop him
01608            *  (that is, the 3 of above, + 1 before any lag is counted) */
01609           IConsolePrintF(CC_ERROR,"Client #%d is dropped because the client did not respond for more than 4 game-days", cs->client_id);
01610           NetworkCloseClient(cs);
01611           continue;
01612         }
01613 
01614         /* Report once per time we detect the lag */
01615         if (cs->lag_test == 0) {
01616           IConsolePrintF(CC_WARNING,"[%d] Client #%d is slow, try increasing *net_frame_freq to a higher value!", _frame_counter, cs->client_id);
01617           cs->lag_test = 1;
01618         }
01619       } else {
01620         cs->lag_test = 0;
01621       }
01622     } else if (cs->status == STATUS_PRE_ACTIVE) {
01623       int lag = NetworkCalculateLag(cs);
01624       if (lag > _settings_client.network.max_join_time) {
01625         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);
01626         NetworkCloseClient(cs);
01627       }
01628     } else if (cs->status == STATUS_INACTIVE) {
01629       int lag = NetworkCalculateLag(cs);
01630       if (lag > 4 * DAY_TICKS) {
01631         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);
01632         NetworkCloseClient(cs);
01633       }
01634     }
01635 
01636     if (cs->status >= STATUS_PRE_ACTIVE) {
01637       /* Check if we can send command, and if we have anything in the queue */
01638       NetworkHandleCommandQueue(cs);
01639 
01640       /* Send an updated _frame_counter_max to the client */
01641       if (send_frame) SEND_COMMAND(PACKET_SERVER_FRAME)(cs);
01642 
01643 #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME
01644       /* Send a sync-check packet */
01645       if (send_sync) SEND_COMMAND(PACKET_SERVER_SYNC)(cs);
01646 #endif
01647     }
01648   }
01649 
01650   /* See if we need to advertise */
01651   NetworkUDPAdvertise();
01652 }
01653 
01654 void NetworkServerYearlyLoop()
01655 {
01656   NetworkCheckRestartMap();
01657 }
01658 
01659 void NetworkServerMonthlyLoop()
01660 {
01661   NetworkAutoCleanCompanies();
01662 }
01663 
01664 void NetworkServerChangeOwner(Owner current_owner, Owner new_owner)
01665 {
01666   /* The server has to handle all administrative issues, for example
01667    * updating and notifying all clients of what has happened */
01668   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(CLIENT_ID_SERVER);
01669 
01670   /* The server has just changed from owner */
01671   if (current_owner == ci->client_playas) {
01672     ci->client_playas = new_owner;
01673     NetworkUpdateClientInfo(CLIENT_ID_SERVER);
01674   }
01675 
01676   /* Find all clients that were in control of this company, and mark them as new_owner */
01677   FOR_ALL_CLIENT_INFOS(ci) {
01678     if (current_owner == ci->client_playas) {
01679       ci->client_playas = new_owner;
01680       NetworkUpdateClientInfo(ci->client_id);
01681     }
01682   }
01683 }
01684 
01685 const char *GetClientIP(const NetworkClientInfo *ci)
01686 {
01687   struct in_addr addr;
01688 
01689   addr.s_addr = ci->client_ip;
01690   return inet_ntoa(addr);
01691 }
01692 
01693 void NetworkServerShowStatusToConsole()
01694 {
01695   static const char * const stat_str[] = {
01696     "inactive",
01697     "authorizing",
01698     "authorized",
01699     "waiting",
01700     "loading map",
01701     "map done",
01702     "ready",
01703     "active"
01704   };
01705 
01706   NetworkClientSocket *cs;
01707   FOR_ALL_CLIENT_SOCKETS(cs) {
01708     int lag = NetworkCalculateLag(cs);
01709     const NetworkClientInfo *ci = cs->GetInfo();
01710     const char *status;
01711 
01712     status = (cs->status < (ptrdiff_t)lengthof(stat_str) ? stat_str[cs->status] : "unknown");
01713     IConsolePrintF(CC_INFO, "Client #%1d  name: '%s'  status: '%s'  frame-lag: %3d  company: %1d  IP: %s  unique-id: '%s'",
01714       cs->client_id, ci->client_name, status, lag,
01715       ci->client_playas + (IsValidCompanyID(ci->client_playas) ? 1 : 0),
01716       GetClientIP(ci), ci->unique_id);
01717   }
01718 }
01719 
01723 void NetworkServerSendConfigUpdate()
01724 {
01725   NetworkClientSocket *cs;
01726 
01727   FOR_ALL_CLIENT_SOCKETS(cs) {
01728     SEND_COMMAND(PACKET_SERVER_CONFIG_UPDATE)(cs);
01729   }
01730 }
01731 
01732 void NetworkServerUpdateCompanyPassworded(CompanyID company_id, bool passworded)
01733 {
01734   if (NetworkCompanyIsPassworded(company_id) == passworded) return;
01735 
01736   SB(_network_company_passworded, company_id, 1, !!passworded);
01737   InvalidateWindowClasses(WC_COMPANY);
01738 
01739   NetworkClientSocket *cs;
01740   FOR_ALL_CLIENT_SOCKETS(cs) {
01741     SEND_COMMAND(PACKET_SERVER_COMPANY_UPDATE)(cs);
01742   }
01743 }
01744 
01751 void NetworkServerDoMove(ClientID client_id, CompanyID company_id)
01752 {
01753   /* Only allow non-dedicated servers and normal clients to be moved */
01754   if (client_id == CLIENT_ID_SERVER && _network_dedicated) return;
01755 
01756   NetworkClientInfo *ci = NetworkFindClientInfoFromClientID(client_id);
01757 
01758   /* No need to waste network resources if the client is in the company already! */
01759   if (ci->client_playas == company_id) return;
01760 
01761   ci->client_playas = company_id;
01762 
01763   if (client_id == CLIENT_ID_SERVER) {
01764     SetLocalCompany(company_id);
01765   } else {
01766     SEND_COMMAND(PACKET_SERVER_MOVE)(NetworkFindClientStateFromClientID(client_id), client_id, company_id);
01767   }
01768 
01769   /* announce the client's move */
01770   NetworkUpdateClientInfo(client_id);
01771 
01772   NetworkAction action = (company_id == COMPANY_SPECTATOR) ? NETWORK_ACTION_COMPANY_SPECTATOR : NETWORK_ACTION_COMPANY_JOIN;
01773   NetworkServerSendChat(action, DESTTYPE_BROADCAST, 0, "", client_id, company_id + 1);
01774 }
01775 
01776 void NetworkServerSendRcon(ClientID client_id, ConsoleColour colour_code, const char *string)
01777 {
01778   SEND_COMMAND(PACKET_SERVER_RCON)(NetworkFindClientStateFromClientID(client_id), colour_code, string);
01779 }
01780 
01781 void NetworkServerSendError(ClientID client_id, NetworkErrorCode error)
01782 {
01783   SEND_COMMAND(PACKET_SERVER_ERROR)(NetworkFindClientStateFromClientID(client_id), error);
01784 }
01785 
01786 void NetworkServerKickClient(ClientID client_id)
01787 {
01788   if (client_id == CLIENT_ID_SERVER) return;
01789   NetworkServerSendError(client_id, NETWORK_ERROR_KICKED);
01790 }
01791 
01792 void NetworkServerBanIP(const char *banip)
01793 {
01794   const NetworkClientInfo *ci;
01795   uint32 ip_number = inet_addr(banip);
01796 
01797   /* There can be multiple clients with the same IP, kick them all */
01798   FOR_ALL_CLIENT_INFOS(ci) {
01799     if (ci->client_ip == ip_number) {
01800       NetworkServerKickClient(ci->client_id);
01801     }
01802   }
01803 
01804   /* Add user to ban-list */
01805   for (uint index = 0; index < lengthof(_network_ban_list); index++) {
01806     if (_network_ban_list[index] == NULL) {
01807       _network_ban_list[index] = strdup(banip);
01808       break;
01809     }
01810   }
01811 }
01812 
01813 bool NetworkCompanyHasClients(CompanyID company)
01814 {
01815   const NetworkClientInfo *ci;
01816   FOR_ALL_CLIENT_INFOS(ci) {
01817     if (ci->client_playas == company) return true;
01818   }
01819   return false;
01820 }
01821 
01822 #endif /* ENABLE_NETWORK */

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