/* $Id$ */ /** @file network_server.cpp Server part of the network protocol. */ #ifdef ENABLE_NETWORK #include "../stdafx.h" #include "../openttd.h" // XXX StringID #include "../debug.h" #include "../strings_func.h" #include "network_internal.h" #include "core/tcp.h" #include "../vehicle_base.h" #include "../vehicle_func.h" #include "../date_func.h" #include "network_server.h" #include "network_udp.h" #include "../console_func.h" #include "../command_func.h" #include "../saveload.h" #include "../station_base.h" #include "../variables.h" #include "../genworld.h" #include "../core/alloc_func.hpp" #include "../fileio.h" #include "../string_func.h" #include "../player_base.h" #include "../player_func.h" #include "../player_gui.h" #include "../settings_type.h" #include "table/strings.h" // This file handles all the server-commands static void NetworkHandleCommandQueue(NetworkTCPSocketHandler* cs); // ********** // Sending functions // DEF_SERVER_SEND_COMMAND has parameter: NetworkTCPSocketHandler *cs // ********** DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CLIENT_INFO)(NetworkTCPSocketHandler *cs, NetworkClientInfo *ci) { // // Packet: SERVER_CLIENT_INFO // Function: Sends info about a client // Data: // uint16: The index of the client (always unique on a server. 1 = server) // uint8: As which player the client is playing // String: The name of the client // String: The unique id of the client // if (ci->client_index != NETWORK_EMPTY_INDEX) { Packet *p = NetworkSend_Init(PACKET_SERVER_CLIENT_INFO); p->Send_uint16(ci->client_index); p->Send_uint8 (ci->client_playas); p->Send_string(ci->client_name); p->Send_string(ci->unique_id); cs->Send_Packet(p); } } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_COMPANY_INFO) { // // Packet: SERVER_COMPANY_INFO // Function: Sends info about the companies // Data: // int i; Player *player; Packet *p; byte active = ActivePlayerCount(); if (active == 0) { p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO); p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION); p->Send_uint8 (active); cs->Send_Packet(p); return; } NetworkPopulateCompanyInfo(); FOR_ALL_PLAYERS(player) { if (!player->is_active) continue; p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO); p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION); p->Send_uint8 (active); p->Send_uint8 (player->index); p->Send_string(_network_player_info[player->index].company_name); p->Send_uint32(_network_player_info[player->index].inaugurated_year); p->Send_uint64(_network_player_info[player->index].company_value); p->Send_uint64(_network_player_info[player->index].money); p->Send_uint64(_network_player_info[player->index].income); p->Send_uint16(_network_player_info[player->index].performance); /* Send 1 if there is a passord for the company else send 0 */ p->Send_bool(!StrEmpty(_network_player_info[player->index].password)); for (i = 0; i < NETWORK_VEHICLE_TYPES; i++) { p->Send_uint16(_network_player_info[player->index].num_vehicle[i]); } for (i = 0; i < NETWORK_STATION_TYPES; i++) { p->Send_uint16(_network_player_info[player->index].num_station[i]); } if (_network_player_info[player->index].players[0] == '\0') { p->Send_string(""); } else { p->Send_string(_network_player_info[player->index].players); } cs->Send_Packet(p); } p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO); p->Send_uint8 (NETWORK_COMPANY_INFO_VERSION); p->Send_uint8 (0); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR)(NetworkTCPSocketHandler *cs, NetworkErrorCode error) { // // Packet: SERVER_ERROR // Function: The client made an error // Data: // uint8: ErrorID (see network_data.h, NetworkErrorCode) // char str[100]; Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR); p->Send_uint8(error); cs->Send_Packet(p); GetNetworkErrorMsg(str, error, lastof(str)); // Only send when the current client was in game if (cs->status > STATUS_AUTH) { NetworkTCPSocketHandler *new_cs; char client_name[NETWORK_CLIENT_NAME_LENGTH]; NetworkGetClientName(client_name, sizeof(client_name), cs); DEBUG(net, 1, "'%s' made an error and has been disconnected. Reason: '%s'", client_name, str); NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, "%s", str); FOR_ALL_CLIENTS(new_cs) { if (new_cs->status > STATUS_AUTH && new_cs != cs) { // Some errors we filter to a more general error. Clients don't have to know the real // reason a joining failed. if (error == NETWORK_ERROR_NOT_AUTHORIZED || error == NETWORK_ERROR_NOT_EXPECTED || error == NETWORK_ERROR_WRONG_REVISION) error = NETWORK_ERROR_ILLEGAL_PACKET; SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->index, error); } } } else { DEBUG(net, 1, "Client %d made an error and has been disconnected. Reason: '%s'", cs->index, str); } cs->has_quit = true; // Make sure the data get's there before we close the connection cs->Send_Packets(); // The client made a mistake, so drop his connection now! NetworkCloseClient(cs); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHECK_NEWGRFS)(NetworkTCPSocketHandler *cs) { // // Packet: PACKET_SERVER_CHECK_NEWGRFS // Function: Sends info about the used GRFs to the client // Data: // uint8: Amount of GRFs // And then for each GRF: // uint32: GRF ID // 16 * uint8: MD5 checksum of the GRF // Packet *p = NetworkSend_Init(PACKET_SERVER_CHECK_NEWGRFS); const GRFConfig *c; uint grf_count = 0; for (c = _grfconfig; c != NULL; c = c->next) { if (!HasBit(c->flags, GCF_STATIC)) grf_count++; } p->Send_uint8 (grf_count); for (c = _grfconfig; c != NULL; c = c->next) { if (!HasBit(c->flags, GCF_STATIC)) cs->Send_GRFIdentifier(p, c); } cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_NEED_PASSWORD)(NetworkTCPSocketHandler *cs, NetworkPasswordType type) { // // Packet: SERVER_NEED_PASSWORD // Function: Indication to the client that the server needs a password // Data: // uint8: Type of password // /* Invalid packet when status is AUTH or higher */ if (cs->status >= STATUS_AUTH) return; cs->status = STATUS_AUTHORIZING; Packet *p = NetworkSend_Init(PACKET_SERVER_NEED_PASSWORD); p->Send_uint8(type); p->Send_uint32(_settings_game.game_creation.generation_seed); p->Send_string(_settings_client.network.network_id); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WELCOME) { // // Packet: SERVER_WELCOME // Function: The client is joined and ready to receive his map // Data: // uint16: Own ClientID // Packet *p; NetworkTCPSocketHandler *new_cs; // Invalid packet when status is AUTH or higher if (cs->status >= STATUS_AUTH) return; cs->status = STATUS_AUTH; _network_game_info.clients_on++; p = NetworkSend_Init(PACKET_SERVER_WELCOME); p->Send_uint16(cs->index); p->Send_uint32(_settings_game.game_creation.generation_seed); p->Send_string(_settings_client.network.network_id); cs->Send_Packet(p); // Transmit info about all the active clients FOR_ALL_CLIENTS(new_cs) { if (new_cs != cs && new_cs->status > STATUS_AUTH) SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, DEREF_CLIENT_INFO(new_cs)); } // Also send the info of the server SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX)); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WAIT) { // // Packet: PACKET_SERVER_WAIT // Function: The client can not receive the map at the moment because // someone else is already receiving the map // Data: // uint8: Clients awaiting map // int waiting = 0; NetworkTCPSocketHandler *new_cs; Packet *p; // Count how many players are waiting in the queue FOR_ALL_CLIENTS(new_cs) { if (new_cs->status == STATUS_MAP_WAIT) waiting++; } p = NetworkSend_Init(PACKET_SERVER_WAIT); p->Send_uint8(waiting); cs->Send_Packet(p); } // This sends the map to the client DEF_SERVER_SEND_COMMAND(PACKET_SERVER_MAP) { // // Packet: SERVER_MAP // Function: Sends the map to the client, or a part of it (it is splitted in // a lot of multiple packets) // Data: // uint8: packet-type (MAP_PACKET_START, MAP_PACKET_NORMAL and MAP_PACKET_END) // if MAP_PACKET_START: // uint32: The current FrameCounter // if MAP_PACKET_NORMAL: // piece of the map (till max-size of packet) // if MAP_PACKET_END: // uint32: seed0 of player // uint32: seed1 of player // last 2 are repeated MAX_PLAYERS time // static FILE *file_pointer; static uint sent_packets; // How many packets we did send succecfully last time if (cs->status < STATUS_AUTH) { // Illegal call, return error and ignore the packet SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED); return; } if (cs->status == STATUS_AUTH) { const char *filename = "network_server.tmp"; Packet *p; // Make a dump of the current game if (SaveOrLoad(filename, SL_SAVE, AUTOSAVE_DIR) != SL_OK) error("network savedump failed"); file_pointer = FioFOpenFile(filename, "rb", AUTOSAVE_DIR); fseek(file_pointer, 0, SEEK_END); if (ftell(file_pointer) == 0) error("network savedump failed - zero sized savegame?"); // Now send the _frame_counter and how many packets are coming p = NetworkSend_Init(PACKET_SERVER_MAP); p->Send_uint8 (MAP_PACKET_START); p->Send_uint32(_frame_counter); p->Send_uint32(ftell(file_pointer)); cs->Send_Packet(p); fseek(file_pointer, 0, SEEK_SET); sent_packets = 4; // We start with trying 4 packets cs->status = STATUS_MAP; /* Mark the start of download */ cs->last_frame = _frame_counter; cs->last_frame_server = _frame_counter; } if (cs->status == STATUS_MAP) { uint i; int res; for (i = 0; i < sent_packets; i++) { Packet *p = NetworkSend_Init(PACKET_SERVER_MAP); p->Send_uint8(MAP_PACKET_NORMAL); res = (int)fread(p->buffer + p->size, 1, SEND_MTU - p->size, file_pointer); if (ferror(file_pointer)) error("Error reading temporary network savegame!"); p->size += res; cs->Send_Packet(p); if (feof(file_pointer)) { // Done reading! Packet *p = NetworkSend_Init(PACKET_SERVER_MAP); p->Send_uint8(MAP_PACKET_END); cs->Send_Packet(p); // Set the status to DONE_MAP, no we will wait for the client // to send it is ready (maybe that happens like never ;)) cs->status = STATUS_DONE_MAP; fclose(file_pointer); { NetworkTCPSocketHandler *new_cs; bool new_map_client = false; // Check if there is a client waiting for receiving the map // and start sending him the map FOR_ALL_CLIENTS(new_cs) { if (new_cs->status == STATUS_MAP_WAIT) { // Check if we already have a new client to send the map to if (!new_map_client) { // If not, this client will get the map new_cs->status = STATUS_AUTH; new_map_client = true; SEND_COMMAND(PACKET_SERVER_MAP)(new_cs); } else { // Else, send the other clients how many clients are in front of them SEND_COMMAND(PACKET_SERVER_WAIT)(new_cs); } } } } // There is no more data, so break the for break; } } // Send all packets (forced) and check if we have send it all cs->Send_Packets(); if (cs->IsPacketQueueEmpty()) { // All are sent, increase the sent_packets sent_packets *= 2; } else { // Not everything is sent, decrease the sent_packets if (sent_packets > 1) sent_packets /= 2; } } } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_JOIN)(NetworkTCPSocketHandler *cs, uint16 client_index) { // // Packet: SERVER_JOIN // Function: A client is joined (all active clients receive this after a // PACKET_CLIENT_MAP_OK) Mostly what directly follows is a // PACKET_SERVER_CLIENT_INFO // Data: // uint16: Client-Index // Packet *p = NetworkSend_Init(PACKET_SERVER_JOIN); p->Send_uint16(client_index); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_FRAME) { // // Packet: SERVER_FRAME // Function: Sends the current frame-counter to the client // Data: // uint32: Frame Counter // uint32: Frame Counter Max (how far may the client walk before the server?) // [uint32: general-seed-1] // [uint32: general-seed-2] // (last two depends on compile-settings, and are not default settings) // Packet *p = NetworkSend_Init(PACKET_SERVER_FRAME); p->Send_uint32(_frame_counter); p->Send_uint32(_frame_counter_max); #ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME p->Send_uint32(_sync_seed_1); #ifdef NETWORK_SEND_DOUBLE_SEED p->Send_uint32(_sync_seed_2); #endif #endif cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SYNC) { // // Packet: SERVER_SYNC // Function: Sends a sync-check to the client // Data: // uint32: Frame Counter // uint32: General-seed-1 // [uint32: general-seed-2] // (last one depends on compile-settings, and are not default settings) // Packet *p = NetworkSend_Init(PACKET_SERVER_SYNC); p->Send_uint32(_frame_counter); p->Send_uint32(_sync_seed_1); #ifdef NETWORK_SEND_DOUBLE_SEED p->Send_uint32(_sync_seed_2); #endif cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_COMMAND)(NetworkTCPSocketHandler *cs, CommandPacket *cp) { // // Packet: SERVER_COMMAND // Function: Sends a DoCommand to the client // Data: // uint8: PlayerID (0..MAX_PLAYERS-1) // uint32: CommandID (see command.h) // uint32: P1 (free variables used in DoCommand) // uint32: P2 // uint32: Tile // string: text // uint8: CallBackID (see callback_table.c) // uint32: Frame of execution // Packet *p = NetworkSend_Init(PACKET_SERVER_COMMAND); p->Send_uint8 (cp->player); p->Send_uint32(cp->cmd); p->Send_uint32(cp->p1); p->Send_uint32(cp->p2); p->Send_uint32(cp->tile); p->Send_string(cp->text); p->Send_uint8 (cp->callback); p->Send_uint32(cp->frame); p->Send_bool (cp->my_cmd); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHAT)(NetworkTCPSocketHandler *cs, NetworkAction action, uint16 client_index, bool self_send, const char *msg) { // // Packet: SERVER_CHAT // Function: Sends a chat-packet to the client // Data: // uint8: ActionID (see network_data.h, NetworkAction) // uint16: Client-index // String: Message (max MAX_TEXT_MSG_LEN) // Packet *p = NetworkSend_Init(PACKET_SERVER_CHAT); p->Send_uint8 (action); p->Send_uint16(client_index); p->Send_bool (self_send); p->Send_string(msg); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR_QUIT)(NetworkTCPSocketHandler *cs, uint16 client_index, NetworkErrorCode errorno) { // // Packet: SERVER_ERROR_QUIT // Function: One of the clients made an error and is quiting the game // This packet informs the other clients of that. // Data: // uint16: Client-index // uint8: ErrorID (see network_data.h, NetworkErrorCode) // Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR_QUIT); p->Send_uint16(client_index); p->Send_uint8 (errorno); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_QUIT)(NetworkTCPSocketHandler *cs, uint16 client_index, const char *leavemsg) { // // Packet: SERVER_ERROR_QUIT // Function: A client left the game, and this packets informs the other clients // of that. // Data: // uint16: Client-index // String: leave-message // Packet *p = NetworkSend_Init(PACKET_SERVER_QUIT); p->Send_uint16(client_index); p->Send_string(leavemsg); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SHUTDOWN) { // // Packet: SERVER_SHUTDOWN // Function: Let the clients know that the server is closing // Data: // // Packet *p = NetworkSend_Init(PACKET_SERVER_SHUTDOWN); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND(PACKET_SERVER_NEWGAME) { // // Packet: PACKET_SERVER_NEWGAME // Function: Let the clients know that the server is loading a new map // Data: // // Packet *p = NetworkSend_Init(PACKET_SERVER_NEWGAME); cs->Send_Packet(p); } DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_RCON)(NetworkTCPSocketHandler *cs, uint16 color, const char *command) { Packet *p = NetworkSend_Init(PACKET_SERVER_RCON); p->Send_uint16(color); p->Send_string(command); cs->Send_Packet(p); } // ********** // Receiving functions // DEF_SERVER_RECEIVE_COMMAND has parameter: NetworkTCPSocketHandler *cs, Packet *p // ********** DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_COMPANY_INFO) { SEND_COMMAND(PACKET_SERVER_COMPANY_INFO)(cs); } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED) { NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs); /* We now want a password from the client else we do not allow him in! */ if (_network_game_info.use_password) { SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_GAME_PASSWORD); } else { if (IsValidPlayer(ci->client_playas) && _network_player_info[ci->client_playas].password[0] != '\0') { SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_COMPANY_PASSWORD); } else { SEND_COMMAND(PACKET_SERVER_WELCOME)(cs); } } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_JOIN) { char name[NETWORK_CLIENT_NAME_LENGTH]; char unique_id[NETWORK_UNIQUE_ID_LENGTH]; NetworkClientInfo *ci; PlayerID playas; NetworkLanguage client_lang; char client_revision[NETWORK_REVISION_LENGTH]; p->Recv_string(client_revision, sizeof(client_revision)); #if defined(WITH_REV) || defined(WITH_REV_HACK) // Check if the client has revision control enabled if (!IsNetworkCompatibleVersion(client_revision)) { // Different revisions!! SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_REVISION); return; } #endif p->Recv_string(name, sizeof(name)); playas = (Owner)p->Recv_uint8(); client_lang = (NetworkLanguage)p->Recv_uint8(); p->Recv_string(unique_id, sizeof(unique_id)); if (cs->has_quit) return; // join another company does not affect these values switch (playas) { case PLAYER_NEW_COMPANY: /* New company */ if (ActivePlayerCount() >= _network_game_info.companies_max) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_FULL); return; } break; case PLAYER_SPECTATOR: /* Spectator */ if (NetworkSpectatorCount() >= _network_game_info.spectators_max) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_FULL); return; } break; default: /* Join another company (companies 1-8 (index 0-7)) */ if (!IsValidPlayer(playas)) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_PLAYER_MISMATCH); return; } break; } // We need a valid name.. make it Player if (*name == '\0') ttd_strlcpy(name, "Player", sizeof(name)); if (!NetworkFindName(name)) { // Change name if duplicate // We could not create a name for this player SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NAME_IN_USE); return; } ci = DEREF_CLIENT_INFO(cs); ttd_strlcpy(ci->client_name, name, sizeof(ci->client_name)); ttd_strlcpy(ci->unique_id, unique_id, sizeof(ci->unique_id)); ci->client_playas = playas; ci->client_lang = client_lang; /* Make sure companies to which people try to join are not autocleaned */ if (IsValidPlayer(playas)) _network_player_info[playas].months_empty = 0; if (_grfconfig == NULL) { RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED)(cs, NULL); } else { SEND_COMMAND(PACKET_SERVER_CHECK_NEWGRFS)(cs); } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_PASSWORD) { NetworkPasswordType type; char password[NETWORK_PASSWORD_LENGTH]; const NetworkClientInfo *ci; type = (NetworkPasswordType)p->Recv_uint8(); p->Recv_string(password, sizeof(password)); if (cs->status == STATUS_AUTHORIZING && type == NETWORK_GAME_PASSWORD) { // Check game-password if (strcmp(password, _network_game_info.server_password) != 0) { // Password is invalid SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_PASSWORD); return; } ci = DEREF_CLIENT_INFO(cs); if (IsValidPlayer(ci->client_playas) && _network_player_info[ci->client_playas].password[0] != '\0') { SEND_COMMAND(PACKET_SERVER_NEED_PASSWORD)(cs, NETWORK_COMPANY_PASSWORD); return; } // Valid password, allow user SEND_COMMAND(PACKET_SERVER_WELCOME)(cs); return; } else if (cs->status == STATUS_AUTHORIZING && type == NETWORK_COMPANY_PASSWORD) { ci = DEREF_CLIENT_INFO(cs); if (strcmp(password, _network_player_info[ci->client_playas].password) != 0) { // Password is invalid SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_WRONG_PASSWORD); return; } SEND_COMMAND(PACKET_SERVER_WELCOME)(cs); return; } SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); return; } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_GETMAP) { NetworkTCPSocketHandler *new_cs; // The client was never joined.. so this is impossible, right? // Ignore the packet, give the client a warning, and close his connection if (cs->status < STATUS_AUTH || cs->has_quit) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED); return; } // Check if someone else is receiving the map FOR_ALL_CLIENTS(new_cs) { if (new_cs->status == STATUS_MAP) { // Tell the new client to wait cs->status = STATUS_MAP_WAIT; SEND_COMMAND(PACKET_SERVER_WAIT)(cs); return; } } // We receive a request to upload the map.. give it to the client! SEND_COMMAND(PACKET_SERVER_MAP)(cs); } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_MAP_OK) { // Client has the map, now start syncing if (cs->status == STATUS_DONE_MAP && !cs->has_quit) { char client_name[NETWORK_CLIENT_NAME_LENGTH]; NetworkTCPSocketHandler *new_cs; NetworkGetClientName(client_name, sizeof(client_name), cs); NetworkTextMessage(NETWORK_ACTION_JOIN, CC_DEFAULT, false, client_name, ""); // Mark the client as pre-active, and wait for an ACK // so we know he is done loading and in sync with us cs->status = STATUS_PRE_ACTIVE; NetworkHandleCommandQueue(cs); SEND_COMMAND(PACKET_SERVER_FRAME)(cs); SEND_COMMAND(PACKET_SERVER_SYNC)(cs); // This is the frame the client receives // we need it later on to make sure the client is not too slow cs->last_frame = _frame_counter; cs->last_frame_server = _frame_counter; FOR_ALL_CLIENTS(new_cs) { if (new_cs->status > STATUS_AUTH) { SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(new_cs, DEREF_CLIENT_INFO(cs)); SEND_COMMAND(PACKET_SERVER_JOIN)(new_cs, cs->index); } } if (_settings_client.network.pause_on_join) { /* Now pause the game till the client is in sync */ DoCommandP(0, 1, 0, NULL, CMD_PAUSE); NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_BROADCAST, 0, "Game paused (incoming client)", NETWORK_SERVER_INDEX); } } else { // Wrong status for this packet, give a warning to client, and close connection SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); } } /** Enforce the command flags. * Eg a server-only command can only be executed by a server, etc. * @param *cp the commandpacket that is going to be checked * @param *ci client information for debugging output to console */ static bool CheckCommandFlags(const CommandPacket *cp, const NetworkClientInfo *ci) { byte flags = GetCommandFlags(cp->cmd); if (flags & CMD_SERVER && ci->client_index != NETWORK_SERVER_INDEX) { IConsolePrintF(CC_ERROR, "WARNING: server only command from client %d (IP: %s), kicking...", ci->client_index, GetPlayerIP(ci)); return false; } if (flags & CMD_OFFLINE) { IConsolePrintF(CC_ERROR, "WARNING: offline only command from client %d (IP: %s), kicking...", ci->client_index, GetPlayerIP(ci)); return false; } if (cp->cmd != CMD_PLAYER_CTRL && !IsValidPlayer(cp->player) && ci->client_index != NETWORK_SERVER_INDEX) { IConsolePrintF(CC_ERROR, "WARNING: spectator issueing command from client %d (IP: %s), kicking...", ci->client_index, GetPlayerIP(ci)); return false; } return true; } /** The client has done a command and wants us to handle it * @param *cs the connected client that has sent the command * @param *p the packet in which the command was sent */ DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_COMMAND) { NetworkTCPSocketHandler *new_cs; const NetworkClientInfo *ci; byte callback; // The client was never joined.. so this is impossible, right? // Ignore the packet, give the client a warning, and close his connection if (cs->status < STATUS_DONE_MAP || cs->has_quit) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); return; } CommandPacket *cp = MallocT(1); cp->player = (Owner)p->Recv_uint8(); cp->cmd = p->Recv_uint32(); cp->p1 = p->Recv_uint32(); cp->p2 = p->Recv_uint32(); cp->tile = p->Recv_uint32(); p->Recv_string(cp->text, lengthof(cp->text)); callback = p->Recv_uint8(); if (cs->has_quit) { free(cp); return; } ci = DEREF_CLIENT_INFO(cs); /* Check if cp->cmd is valid */ if (!IsValidCommand(cp->cmd)) { IConsolePrintF(CC_ERROR, "WARNING: invalid command from client %d (IP: %s).", ci->client_index, GetPlayerIP(ci)); SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); free(cp); return; } if (!CheckCommandFlags(cp, ci)) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_KICKED); free(cp); return; } /** Only CMD_PLAYER_CTRL is always allowed, for the rest, playas needs * to match the player in the packet. If it doesn't, the client has done * something pretty naughty (or a bug), and will be kicked */ if (!(cp->cmd == CMD_PLAYER_CTRL && cp->p1 == 0) && ci->client_playas != cp->player) { IConsolePrintF(CC_ERROR, "WARNING: player %d (IP: %s) tried to execute a command as player %d, kicking...", ci->client_playas + 1, GetPlayerIP(ci), cp->player + 1); SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_PLAYER_MISMATCH); free(cp); return; } /** @todo CMD_PLAYER_CTRL with p1 = 0 announces a new player to the server. To give the * player the correct ID, the server injects p2 and executes the command. Any other p1 * is prohibited. Pretty ugly and should be redone together with its function. * @see CmdPlayerCtrl() players.c:655 */ if (cp->cmd == CMD_PLAYER_CTRL) { if (cp->p1 != 0) { SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_CHEATER); free(cp); return; } /* XXX - Execute the command as a valid player. Normally this would be done by a * spectator, but that is not allowed any commands. So do an impersonation. The drawback * of this is that the first company's last_built_tile is also updated... */ cp->player = OWNER_BEGIN; cp->p2 = cs - _clients; // XXX - UGLY! p2 is mis-used to get the client-id in CmdPlayerCtrl } // The frame can be executed in the same frame as the next frame-packet // That frame just before that frame is saved in _frame_counter_max cp->frame = _frame_counter_max + 1; cp->next = NULL; // Queue the command for the clients (are send at the end of the frame // if they can handle it ;)) FOR_ALL_CLIENTS(new_cs) { if (new_cs->status >= STATUS_MAP) { // Callbacks are only send back to the client who sent them in the // first place. This filters that out. cp->callback = (new_cs != cs) ? 0 : callback; cp->my_cmd = (new_cs == cs); NetworkAddCommandQueue(new_cs, cp); } } cp->callback = 0; cp->my_cmd = false; // Queue the command on the server if (_local_command_queue == NULL) { _local_command_queue = cp; } else { // Find last packet CommandPacket *c = _local_command_queue; while (c->next != NULL) c = c->next; c->next = cp; } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_ERROR) { // This packets means a client noticed an error and is reporting this // to us. Display the error and report it to the other clients NetworkTCPSocketHandler *new_cs; char str[100]; char client_name[NETWORK_CLIENT_NAME_LENGTH]; NetworkErrorCode errorno = (NetworkErrorCode)p->Recv_uint8(); // The client was never joined.. thank the client for the packet, but ignore it if (cs->status < STATUS_DONE_MAP || cs->has_quit) { cs->has_quit = true; return; } NetworkGetClientName(client_name, sizeof(client_name), cs); GetNetworkErrorMsg(str, errorno, lastof(str)); DEBUG(net, 2, "'%s' reported an error and is closing its connection (%s)", client_name, str); NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, "%s", str); FOR_ALL_CLIENTS(new_cs) { if (new_cs->status > STATUS_AUTH) { SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->index, errorno); } } cs->has_quit = true; } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_QUIT) { // The client wants to leave. Display this and report it to the other // clients. NetworkTCPSocketHandler *new_cs; char str[100]; char client_name[NETWORK_CLIENT_NAME_LENGTH]; // The client was never joined.. thank the client for the packet, but ignore it if (cs->status < STATUS_DONE_MAP || cs->has_quit) { cs->has_quit = true; return; } p->Recv_string(str, lengthof(str)); NetworkGetClientName(client_name, sizeof(client_name), cs); NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, "%s", str); FOR_ALL_CLIENTS(new_cs) { if (new_cs->status > STATUS_AUTH) { SEND_COMMAND(PACKET_SERVER_QUIT)(new_cs, cs->index, str); } } cs->has_quit = true; } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_ACK) { uint32 frame = p->Recv_uint32(); /* The client is trying to catch up with the server */ if (cs->status == STATUS_PRE_ACTIVE) { /* The client is not yet catched up? */ if (frame + DAY_TICKS < _frame_counter) return; /* Now he is! Unpause the game */ cs->status = STATUS_ACTIVE; if (_settings_client.network.pause_on_join) { DoCommandP(0, 0, 0, NULL, CMD_PAUSE); NetworkServerSendChat(NETWORK_ACTION_SERVER_MESSAGE, DESTTYPE_BROADCAST, 0, "Game unpaused (client connected)", NETWORK_SERVER_INDEX); } CheckMinPlayers(); /* Execute script for, e.g. MOTD */ IConsoleCmdExec("exec scripts/on_server_connect.scr 0"); } // The client received the frame, make note of it cs->last_frame = frame; // With those 2 values we can calculate the lag realtime cs->last_frame_server = _frame_counter; } void NetworkServerSendChat(NetworkAction action, DestType desttype, int dest, const char *msg, uint16 from_index) { NetworkTCPSocketHandler *cs; const NetworkClientInfo *ci, *ci_own, *ci_to; switch (desttype) { case DESTTYPE_CLIENT: /* Are we sending to the server? */ if (dest == NETWORK_SERVER_INDEX) { ci = NetworkFindClientInfoFromIndex(from_index); /* Display the text locally, and that is it */ if (ci != NULL) NetworkTextMessage(action, (ConsoleColour)GetDrawStringPlayerColor(ci->client_playas), false, ci->client_name, "%s", msg); } else { /* Else find the client to send the message to */ FOR_ALL_CLIENTS(cs) { if (cs->index == dest) { SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_index, false, msg); break; } } } // Display the message locally (so you know you have sent it) if (from_index != dest) { if (from_index == NETWORK_SERVER_INDEX) { ci = NetworkFindClientInfoFromIndex(from_index); ci_to = NetworkFindClientInfoFromIndex(dest); if (ci != NULL && ci_to != NULL) NetworkTextMessage(action, (ConsoleColour)GetDrawStringPlayerColor(ci->client_playas), true, ci_to->client_name, "%s", msg); } else { FOR_ALL_CLIENTS(cs) { if (cs->index == from_index) { SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, dest, true, msg); break; } } } } break; case DESTTYPE_TEAM: { bool show_local = true; // If this is false, the message is already displayed // on the client who did sent it. /* Find all clients that belong to this player */ ci_to = NULL; FOR_ALL_CLIENTS(cs) { ci = DEREF_CLIENT_INFO(cs); if (ci->client_playas == dest) { SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_index, false, msg); if (cs->index == from_index) show_local = false; ci_to = ci; // Remember a client that is in the company for company-name } } ci = NetworkFindClientInfoFromIndex(from_index); ci_own = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX); if (ci != NULL && ci_own != NULL && ci_own->client_playas == dest) { NetworkTextMessage(action, (ConsoleColour)GetDrawStringPlayerColor(ci->client_playas), false, ci->client_name, "%s", msg); if (from_index == NETWORK_SERVER_INDEX) show_local = false; ci_to = ci_own; } /* There is no such player */ if (ci_to == NULL) break; // Display the message locally (so you know you have sent it) if (ci != NULL && show_local) { if (from_index == NETWORK_SERVER_INDEX) { char name[NETWORK_NAME_LENGTH]; StringID str = IsValidPlayer(ci_to->client_playas) ? STR_COMPANY_NAME : STR_NETWORK_SPECTATORS; SetDParam(0, ci_to->client_playas); GetString(name, str, lastof(name)); NetworkTextMessage(action, (ConsoleColour)GetDrawStringPlayerColor(ci_own->client_playas), true, name, "%s", msg); } else { FOR_ALL_CLIENTS(cs) { if (cs->index == from_index) { SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, ci_to->client_index, true, msg); } } } } } break; default: DEBUG(net, 0, "[server] received unknown chat destination type %d. Doing broadcast instead", desttype); /* fall-through to next case */ case DESTTYPE_BROADCAST: FOR_ALL_CLIENTS(cs) { SEND_COMMAND(PACKET_SERVER_CHAT)(cs, action, from_index, false, msg); } ci = NetworkFindClientInfoFromIndex(from_index); if (ci != NULL) NetworkTextMessage(action, (ConsoleColour)GetDrawStringPlayerColor(ci->client_playas), false, ci->client_name, "%s", msg); break; } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_CHAT) { NetworkAction action = (NetworkAction)p->Recv_uint8(); DestType desttype = (DestType)p->Recv_uint8(); int dest = p->Recv_uint16(); char msg[MAX_TEXT_MSG_LEN]; p->Recv_string(msg, MAX_TEXT_MSG_LEN); NetworkServerSendChat(action, desttype, dest, msg, cs->index); } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_SET_PASSWORD) { char password[NETWORK_PASSWORD_LENGTH]; const NetworkClientInfo *ci; p->Recv_string(password, sizeof(password)); ci = DEREF_CLIENT_INFO(cs); if (IsValidPlayer(ci->client_playas)) { ttd_strlcpy(_network_player_info[ci->client_playas].password, password, sizeof(_network_player_info[0].password)); } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_SET_NAME) { char client_name[NETWORK_CLIENT_NAME_LENGTH]; NetworkClientInfo *ci; p->Recv_string(client_name, sizeof(client_name)); ci = DEREF_CLIENT_INFO(cs); if (cs->has_quit) return; if (ci != NULL) { // Display change if (NetworkFindName(client_name)) { NetworkTextMessage(NETWORK_ACTION_NAME_CHANGE, CC_DEFAULT, false, ci->client_name, "%s", client_name); ttd_strlcpy(ci->client_name, client_name, sizeof(ci->client_name)); NetworkUpdateClientInfo(ci->client_index); } } } DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_RCON) { char pass[NETWORK_PASSWORD_LENGTH]; char command[NETWORK_RCONCOMMAND_LENGTH]; if (_network_game_info.rcon_password[0] == '\0') return; p->Recv_string(pass, sizeof(pass)); p->Recv_string(command, sizeof(command)); if (strcmp(pass, _network_game_info.rcon_password) != 0) { DEBUG(net, 0, "[rcon] wrong password from client-id %d", cs->index); return; } DEBUG(net, 0, "[rcon] client-id %d executed: '%s'", cs->index, command); _redirect_console_to_client = cs->index; IConsoleCmdExec(command); _redirect_console_to_client = 0; return; } // The layout for the receive-functions by the server typedef void NetworkServerPacket(NetworkTCPSocketHandler *cs, Packet *p); // This array matches PacketType. At an incoming // packet it is matches against this array // and that way the right function to handle that // packet is found. static NetworkServerPacket* const _network_server_packet[] = { NULL, /*PACKET_SERVER_FULL,*/ NULL, /*PACKET_SERVER_BANNED,*/ RECEIVE_COMMAND(PACKET_CLIENT_JOIN), NULL, /*PACKET_SERVER_ERROR,*/ RECEIVE_COMMAND(PACKET_CLIENT_COMPANY_INFO), NULL, /*PACKET_SERVER_COMPANY_INFO,*/ NULL, /*PACKET_SERVER_CLIENT_INFO,*/ NULL, /*PACKET_SERVER_NEED_PASSWORD,*/ RECEIVE_COMMAND(PACKET_CLIENT_PASSWORD), NULL, /*PACKET_SERVER_WELCOME,*/ RECEIVE_COMMAND(PACKET_CLIENT_GETMAP), NULL, /*PACKET_SERVER_WAIT,*/ NULL, /*PACKET_SERVER_MAP,*/ RECEIVE_COMMAND(PACKET_CLIENT_MAP_OK), NULL, /*PACKET_SERVER_JOIN,*/ NULL, /*PACKET_SERVER_FRAME,*/ NULL, /*PACKET_SERVER_SYNC,*/ RECEIVE_COMMAND(PACKET_CLIENT_ACK), RECEIVE_COMMAND(PACKET_CLIENT_COMMAND), NULL, /*PACKET_SERVER_COMMAND,*/ RECEIVE_COMMAND(PACKET_CLIENT_CHAT), NULL, /*PACKET_SERVER_CHAT,*/ RECEIVE_COMMAND(PACKET_CLIENT_SET_PASSWORD), RECEIVE_COMMAND(PACKET_CLIENT_SET_NAME), RECEIVE_COMMAND(PACKET_CLIENT_QUIT), RECEIVE_COMMAND(PACKET_CLIENT_ERROR), NULL, /*PACKET_SERVER_QUIT,*/ NULL, /*PACKET_SERVER_ERROR_QUIT,*/ NULL, /*PACKET_SERVER_SHUTDOWN,*/ NULL, /*PACKET_SERVER_NEWGAME,*/ NULL, /*PACKET_SERVER_RCON,*/ RECEIVE_COMMAND(PACKET_CLIENT_RCON), NULL, /*PACKET_CLIENT_CHECK_NEWGRFS,*/ RECEIVE_COMMAND(PACKET_CLIENT_NEWGRFS_CHECKED), }; // If this fails, check the array above with network_data.h assert_compile(lengthof(_network_server_packet) == PACKET_END); // This update the company_info-stuff void NetworkPopulateCompanyInfo() { char password[NETWORK_PASSWORD_LENGTH]; const Player *p; const Vehicle *v; const Station *s; NetworkTCPSocketHandler *cs; const NetworkClientInfo *ci; uint i; uint16 months_empty; FOR_ALL_PLAYERS(p) { if (!p->is_active) { memset(&_network_player_info[p->index], 0, sizeof(NetworkPlayerInfo)); continue; } // Clean the info but not the password ttd_strlcpy(password, _network_player_info[p->index].password, sizeof(password)); months_empty = _network_player_info[p->index].months_empty; memset(&_network_player_info[p->index], 0, sizeof(NetworkPlayerInfo)); _network_player_info[p->index].months_empty = months_empty; ttd_strlcpy(_network_player_info[p->index].password, password, sizeof(_network_player_info[p->index].password)); // Grap the company name SetDParam(0, p->index); GetString(_network_player_info[p->index].company_name, STR_COMPANY_NAME, lastof(_network_player_info[p->index].company_name)); // Check the income if (_cur_year - 1 == p->inaugurated_year) { // The player is here just 1 year, so display [2], else display[1] for (i = 0; i < lengthof(p->yearly_expenses[2]); i++) { _network_player_info[p->index].income -= p->yearly_expenses[2][i]; } } else { for (i = 0; i < lengthof(p->yearly_expenses[1]); i++) { _network_player_info[p->index].income -= p->yearly_expenses[1][i]; } } // Set some general stuff _network_player_info[p->index].inaugurated_year = p->inaugurated_year; _network_player_info[p->index].company_value = p->old_economy[0].company_value; _network_player_info[p->index].money = p->player_money; _network_player_info[p->index].performance = p->old_economy[0].performance_history; } // Go through all vehicles and count the type of vehicles FOR_ALL_VEHICLES(v) { if (!IsValidPlayer(v->owner) || !v->IsPrimaryVehicle()) continue; byte type = 0; switch (v->type) { case VEH_TRAIN: type = 0; break; case VEH_ROAD: type = (v->cargo_type != CT_PASSENGERS) ? 1 : 2; break; case VEH_AIRCRAFT: type = 3; break; case VEH_SHIP: type = 4; break; default: continue; } _network_player_info[v->owner].num_vehicle[type]++; } // Go through all stations and count the types of stations FOR_ALL_STATIONS(s) { if (IsValidPlayer(s->owner)) { NetworkPlayerInfo *npi = &_network_player_info[s->owner]; if (s->facilities & FACIL_TRAIN) npi->num_station[0]++; if (s->facilities & FACIL_TRUCK_STOP) npi->num_station[1]++; if (s->facilities & FACIL_BUS_STOP) npi->num_station[2]++; if (s->facilities & FACIL_AIRPORT) npi->num_station[3]++; if (s->facilities & FACIL_DOCK) npi->num_station[4]++; } } ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX); // Register local player (if not dedicated) if (ci != NULL && IsValidPlayer(ci->client_playas)) ttd_strlcpy(_network_player_info[ci->client_playas].players, ci->client_name, sizeof(_network_player_info[0].players)); FOR_ALL_CLIENTS(cs) { char client_name[NETWORK_CLIENT_NAME_LENGTH]; NetworkGetClientName(client_name, sizeof(client_name), cs); ci = DEREF_CLIENT_INFO(cs); if (ci != NULL && IsValidPlayer(ci->client_playas)) { if (!StrEmpty(_network_player_info[ci->client_playas].players)) { ttd_strlcat(_network_player_info[ci->client_playas].players, ", ", lengthof(_network_player_info[0].players)); } ttd_strlcat(_network_player_info[ci->client_playas].players, client_name, lengthof(_network_player_info[0].players)); } } } // Send a packet to all clients with updated info about this client_index void NetworkUpdateClientInfo(uint16 client_index) { NetworkTCPSocketHandler *cs; NetworkClientInfo *ci = NetworkFindClientInfoFromIndex(client_index); if (ci == NULL) return; FOR_ALL_CLIENTS(cs) { SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, ci); } } /* Check if we want to restart the map */ static void NetworkCheckRestartMap() { if (_settings_client.network.restart_game_year != 0 && _cur_year >= _settings_client.network.restart_game_year) { DEBUG(net, 0, "Auto-restarting map. Year %d reached", _cur_year); StartNewGameWithoutGUI(GENERATE_NEW_SEED); } } /* Check if the server has autoclean_companies activated Two things happen: 1) If a company is not protected, it is closed after 1 year (for example) 2) If a company is protected, protection is disabled after 3 years (for example) (and item 1. happens a year later) */ static void NetworkAutoCleanCompanies() { NetworkTCPSocketHandler *cs; const NetworkClientInfo *ci; const Player *p; bool clients_in_company[MAX_PLAYERS]; if (!_settings_client.network.autoclean_companies) return; memset(clients_in_company, 0, sizeof(clients_in_company)); /* Detect the active companies */ FOR_ALL_CLIENTS(cs) { ci = DEREF_CLIENT_INFO(cs); if (IsValidPlayer(ci->client_playas)) clients_in_company[ci->client_playas] = true; } if (!_network_dedicated) { ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX); if (IsValidPlayer(ci->client_playas)) clients_in_company[ci->client_playas] = true; } /* Go through all the comapnies */ FOR_ALL_PLAYERS(p) { /* Skip the non-active once */ if (!p->is_active || p->is_ai) continue; if (!clients_in_company[p->index]) { /* The company is empty for one month more */ _network_player_info[p->index].months_empty++; /* Is the company empty for autoclean_unprotected-months, and is there no protection? */ if (_network_player_info[p->index].months_empty > _settings_client.network.autoclean_unprotected && _network_player_info[p->index].password[0] == '\0') { /* Shut the company down */ DoCommandP(0, 2, p->index, NULL, CMD_PLAYER_CTRL); IConsolePrintF(CC_DEFAULT, "Auto-cleaned company #%d", p->index + 1); } /* Is the compnay empty for autoclean_protected-months, and there is a protection? */ if (_network_player_info[p->index].months_empty > _settings_client.network.autoclean_protected && _network_player_info[p->index].password[0] != '\0') { /* Unprotect the company */ _network_player_info[p->index].password[0] = '\0'; IConsolePrintF(CC_DEFAULT, "Auto-removed protection from company #%d", p->index+1); _network_player_info[p->index].months_empty = 0; } } else { /* It is not empty, reset the date */ _network_player_info[p->index].months_empty = 0; } } } // This function changes new_name to a name that is unique (by adding #1 ...) // and it returns true if that succeeded. bool NetworkFindName(char new_name[NETWORK_CLIENT_NAME_LENGTH]) { NetworkTCPSocketHandler *new_cs; bool found_name = false; byte number = 0; char original_name[NETWORK_CLIENT_NAME_LENGTH]; // We use NETWORK_CLIENT_NAME_LENGTH in here, because new_name is really a pointer ttd_strlcpy(original_name, new_name, NETWORK_CLIENT_NAME_LENGTH); while (!found_name) { const NetworkClientInfo *ci; found_name = true; FOR_ALL_CLIENTS(new_cs) { ci = DEREF_CLIENT_INFO(new_cs); if (strcmp(ci->client_name, new_name) == 0) { // Name already in use found_name = false; break; } } // Check if it is the same as the server-name ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX); if (ci != NULL) { if (strcmp(ci->client_name, new_name) == 0) found_name = false; // name already in use } if (!found_name) { // Try a new name ( #1, #2, and so on) // Stop if we tried for more than 50 times.. if (number++ > 50) break; snprintf(new_name, NETWORK_CLIENT_NAME_LENGTH, "%s #%d", original_name, number); } } return found_name; } // Reads a packet from the stream bool NetworkServer_ReadPackets(NetworkTCPSocketHandler *cs) { Packet *p; NetworkRecvStatus res; while ((p = cs->Recv_Packet(&res)) != NULL) { byte type = p->Recv_uint8(); if (type < PACKET_END && _network_server_packet[type] != NULL && !cs->has_quit) { _network_server_packet[type](cs, p); } else { DEBUG(net, 0, "[server] received invalid packet type %d", type); } delete p; } return true; } // Handle the local command-queue static void NetworkHandleCommandQueue(NetworkTCPSocketHandler* cs) { CommandPacket *cp; while ( (cp = cs->command_queue) != NULL) { SEND_COMMAND(PACKET_SERVER_COMMAND)(cs, cp); cs->command_queue = cp->next; free(cp); } } // This is called every tick if this is a _network_server void NetworkServer_Tick(bool send_frame) { NetworkTCPSocketHandler *cs; #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME bool send_sync = false; #endif #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME if (_frame_counter >= _last_sync_frame + _settings_client.network.sync_freq) { _last_sync_frame = _frame_counter; send_sync = true; } #endif // Now we are done with the frame, inform the clients that they can // do their frame! FOR_ALL_CLIENTS(cs) { // Check if the speed of the client is what we can expect from a client if (cs->status == STATUS_ACTIVE) { // 1 lag-point per day int lag = NetworkCalculateLag(cs) / DAY_TICKS; if (lag > 0) { if (lag > 3) { // Client did still not report in after 4 game-day, drop him // (that is, the 3 of above, + 1 before any lag is counted) IConsolePrintF(CC_ERROR,"Client #%d is dropped because the client did not respond for more than 4 game-days", cs->index); NetworkCloseClient(cs); continue; } // Report once per time we detect the lag if (cs->lag_test == 0) { IConsolePrintF(CC_WARNING,"[%d] Client #%d is slow, try increasing *net_frame_freq to a higher value!", _frame_counter, cs->index); cs->lag_test = 1; } } else { cs->lag_test = 0; } } else if (cs->status == STATUS_PRE_ACTIVE) { int lag = NetworkCalculateLag(cs); if (lag > _settings_client.network.max_join_time) { IConsolePrintF(CC_ERROR,"Client #%d is dropped because it took longer than %d ticks for him to join", cs->index, _settings_client.network.max_join_time); NetworkCloseClient(cs); } } else if (cs->status == STATUS_INACTIVE) { int lag = NetworkCalculateLag(cs); if (lag > 4 * DAY_TICKS) { IConsolePrintF(CC_ERROR,"Client #%d is dropped because it took longer than %d ticks to start the joining process", cs->index, 4 * DAY_TICKS); NetworkCloseClient(cs); } } if (cs->status >= STATUS_PRE_ACTIVE) { // Check if we can send command, and if we have anything in the queue NetworkHandleCommandQueue(cs); // Send an updated _frame_counter_max to the client if (send_frame) SEND_COMMAND(PACKET_SERVER_FRAME)(cs); #ifndef ENABLE_NETWORK_SYNC_EVERY_FRAME // Send a sync-check packet if (send_sync) SEND_COMMAND(PACKET_SERVER_SYNC)(cs); #endif } } /* See if we need to advertise */ NetworkUDPAdvertise(); } void NetworkServerYearlyLoop() { NetworkCheckRestartMap(); } void NetworkServerMonthlyLoop() { NetworkAutoCleanCompanies(); } void NetworkServerChangeOwner(PlayerID current_player, PlayerID new_player) { /* The server has to handle all administrative issues, for example * updating and notifying all clients of what has happened */ NetworkTCPSocketHandler *cs; NetworkClientInfo *ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX); /* The server has just changed from player */ if (current_player == ci->client_playas) { ci->client_playas = new_player; NetworkUpdateClientInfo(NETWORK_SERVER_INDEX); } /* Find all clients that were in control of this company, and mark them as new_player */ FOR_ALL_CLIENTS(cs) { ci = DEREF_CLIENT_INFO(cs); if (current_player == ci->client_playas) { ci->client_playas = new_player; NetworkUpdateClientInfo(ci->client_index); } } } const char* GetPlayerIP(const NetworkClientInfo* ci) { struct in_addr addr; addr.s_addr = ci->client_ip; return inet_ntoa(addr); } void NetworkServerShowStatusToConsole() { static const char* const stat_str[] = { "inactive", "authorizing", "authorized", "waiting", "loading map", "map done", "ready", "active" }; NetworkTCPSocketHandler *cs; FOR_ALL_CLIENTS(cs) { int lag = NetworkCalculateLag(cs); const NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs); const char* status; status = (cs->status < (ptrdiff_t)lengthof(stat_str) ? stat_str[cs->status] : "unknown"); IConsolePrintF(CC_INFO, "Client #%1d name: '%s' status: '%s' frame-lag: %3d company: %1d IP: %s unique-id: '%s'", cs->index, ci->client_name, status, lag, ci->client_playas + (IsValidPlayer(ci->client_playas) ? 1 : 0), GetPlayerIP(ci), ci->unique_id); } } void NetworkServerSendRcon(uint16 client_index, ConsoleColour colour_code, const char *string) { SEND_COMMAND(PACKET_SERVER_RCON)(NetworkFindClientStateFromIndex(client_index), colour_code, string); } void NetworkServerSendError(uint16 client_index, NetworkErrorCode error) { SEND_COMMAND(PACKET_SERVER_ERROR)(NetworkFindClientStateFromIndex(client_index), error); } bool NetworkCompanyHasPlayers(PlayerID company) { const NetworkTCPSocketHandler *cs; const NetworkClientInfo *ci; FOR_ALL_CLIENTS(cs) { ci = DEREF_CLIENT_INFO(cs); if (ci->client_playas == company) return true; } return false; } #endif /* ENABLE_NETWORK */