Index: ps/trunk/source/network/NetServer.cpp =================================================================== --- ps/trunk/source/network/NetServer.cpp (revision 17169) +++ ps/trunk/source/network/NetServer.cpp (revision 17170) @@ -1,1194 +1,1209 @@ /* Copyright (C) 2015 Wildfire Games. * This file is part of 0 A.D. * * 0 A.D. is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * 0 A.D. is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with 0 A.D. If not, see . */ #include "precompiled.h" #include "NetServer.h" #include "NetClient.h" #include "NetMessage.h" #include "NetSession.h" #include "NetStats.h" #include "NetTurnManager.h" #include "lib/external_libraries/enet.h" #include "ps/CLogger.h" #include "ps/ConfigDB.h" #include "scriptinterface/ScriptInterface.h" #include "scriptinterface/ScriptRuntime.h" #include "simulation2/Simulation2.h" #if CONFIG2_MINIUPNPC #include #include #include #include #endif #define DEFAULT_SERVER_NAME L"Unnamed Server" #define DEFAULT_WELCOME_MESSAGE L"Welcome" #define MAX_CLIENTS 8 static const int CHANNEL_COUNT = 1; /** * enet_host_service timeout (msecs). * Smaller numbers may hurt performance; larger numbers will * hurt latency responding to messages from game thread. */ static const int HOST_SERVICE_TIMEOUT = 50; CNetServer* g_NetServer = NULL; static CStr DebugName(CNetServerSession* session) { if (session == NULL) return "[unknown host]"; if (session->GetGUID().empty()) return "[unauthed host]"; return "[" + session->GetGUID().substr(0, 8) + "...]"; } /** * Async task for receiving the initial game state to be forwarded to another * client that is rejoining an in-progress network game. */ class CNetFileReceiveTask_ServerRejoin : public CNetFileReceiveTask { NONCOPYABLE(CNetFileReceiveTask_ServerRejoin); public: CNetFileReceiveTask_ServerRejoin(CNetServerWorker& server, u32 hostID) : m_Server(server), m_RejoinerHostID(hostID) { } virtual void OnComplete() { // We've received the game state from an existing player - now // we need to send it onwards to the newly rejoining player // Find the session corresponding to the rejoining host (if any) CNetServerSession* session = NULL; for (size_t i = 0; i < m_Server.m_Sessions.size(); ++i) { if (m_Server.m_Sessions[i]->GetHostID() == m_RejoinerHostID) { session = m_Server.m_Sessions[i]; break; } } if (!session) { LOGMESSAGE("Net server: rejoining client disconnected before we sent to it"); return; } // Store the received state file, and tell the client to start downloading it from us // TODO: this will get kind of confused if there's multiple clients downloading in parallel; // they'll race and get whichever happens to be the latest received by the server, // which should still work but isn't great m_Server.m_JoinSyncFile = m_Buffer; CJoinSyncStartMessage message; session->SendMessage(&message); } private: CNetServerWorker& m_Server; u32 m_RejoinerHostID; }; /* * XXX: We use some non-threadsafe functions from the worker thread. * See http://trac.wildfiregames.com/ticket/654 */ CNetServerWorker::CNetServerWorker(int autostartPlayers) : m_AutostartPlayers(autostartPlayers), m_Shutdown(false), m_ScriptInterface(NULL), m_NextHostID(1), m_Host(NULL), m_Stats(NULL) { m_State = SERVER_STATE_UNCONNECTED; m_ServerTurnManager = NULL; m_ServerName = DEFAULT_SERVER_NAME; m_WelcomeMessage = DEFAULT_WELCOME_MESSAGE; } CNetServerWorker::~CNetServerWorker() { if (m_State != SERVER_STATE_UNCONNECTED) { // Tell the thread to shut down { CScopeLock lock(m_WorkerMutex); m_Shutdown = true; } // Wait for it to shut down cleanly pthread_join(m_WorkerThread, NULL); } // Clean up resources delete m_Stats; for (size_t i = 0; i < m_Sessions.size(); ++i) { m_Sessions[i]->DisconnectNow(NDR_UNEXPECTED_SHUTDOWN); delete m_Sessions[i]; } if (m_Host) { enet_host_destroy(m_Host); } delete m_ServerTurnManager; } bool CNetServerWorker::SetupConnection() { ENSURE(m_State == SERVER_STATE_UNCONNECTED); ENSURE(!m_Host); // Bind to default host ENetAddress addr; addr.host = ENET_HOST_ANY; addr.port = PS_DEFAULT_PORT; // Create ENet server m_Host = enet_host_create(&addr, MAX_CLIENTS, CHANNEL_COUNT, 0, 0); if (!m_Host) { LOGERROR("Net server: enet_host_create failed"); return false; } m_Stats = new CNetStatsTable(); if (CProfileViewer::IsInitialised()) g_ProfileViewer.AddRootTable(m_Stats); m_State = SERVER_STATE_PREGAME; // Launch the worker thread int ret = pthread_create(&m_WorkerThread, NULL, &RunThread, this); ENSURE(ret == 0); #if CONFIG2_MINIUPNPC // Launch the UPnP thread ret = pthread_create(&m_UPnPThread, NULL, &SetupUPnP, NULL); ENSURE(ret == 0); #endif return true; } #if CONFIG2_MINIUPNPC void* CNetServerWorker::SetupUPnP(void*) { // Values we want to set. char psPort[6]; sprintf_s(psPort, ARRAY_SIZE(psPort), "%d", PS_DEFAULT_PORT); const char* leaseDuration = "0"; // Indefinite/permanent lease duration. const char* description = "0AD Multiplayer"; const char* protocall = "UDP"; char internalIPAddress[64]; char externalIPAddress[40]; // Variables to hold the values that actually get set. char intClient[40]; char intPort[6]; char duration[16]; // Intermediate variables. struct UPNPUrls urls; struct IGDdatas data; struct UPNPDev* devlist = NULL; // Cached root descriptor URL. std::string rootDescURL; CFG_GET_VAL("network.upnprootdescurl", rootDescURL); if (!rootDescURL.empty()) LOGMESSAGE("Net server: attempting to use cached root descriptor URL: %s", rootDescURL.c_str()); int ret = 0; bool allocatedUrls = false; // Try a cached URL first if (!rootDescURL.empty() && UPNP_GetIGDFromUrl(rootDescURL.c_str(), &urls, &data, internalIPAddress, sizeof(internalIPAddress))) { LOGMESSAGE("Net server: using cached IGD = %s", urls.controlURL); ret = 1; } // No cached URL, or it did not respond. Try getting a valid UPnP device for 10 seconds. #if defined(MINIUPNPC_API_VERSION) && MINIUPNPC_API_VERSION >= 14 else if ((devlist = upnpDiscover(10000, 0, 0, 0, 0, 2, 0)) != NULL) #else else if ((devlist = upnpDiscover(10000, 0, 0, 0, 0, 0)) != NULL) #endif { ret = UPNP_GetValidIGD(devlist, &urls, &data, internalIPAddress, sizeof(internalIPAddress)); allocatedUrls = ret != 0; // urls is allocated on non-zero return values } else { LOGMESSAGE("Net server: upnpDiscover failed and no working cached URL."); return NULL; } switch (ret) { case 0: LOGMESSAGE("Net server: No IGD found"); break; case 1: LOGMESSAGE("Net server: found valid IGD = %s", urls.controlURL); break; case 2: LOGMESSAGE("Net server: found a valid, not connected IGD = %s, will try to continue anyway", urls.controlURL); break; case 3: LOGMESSAGE("Net server: found a UPnP device unrecognized as IGD = %s, will try to continue anyway", urls.controlURL); break; default: debug_warn(L"Unrecognized return value from UPNP_GetValidIGD"); } // Try getting our external/internet facing IP. TODO: Display this on the game-setup page for conviniance. ret = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress); if (ret != UPNPCOMMAND_SUCCESS) { LOGMESSAGE("Net server: GetExternalIPAddress failed with code %d (%s)", ret, strupnperror(ret)); return NULL; } LOGMESSAGE("Net server: ExternalIPAddress = %s", externalIPAddress); // Try to setup port forwarding. ret = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, psPort, psPort, internalIPAddress, description, protocall, 0, leaseDuration); if (ret != UPNPCOMMAND_SUCCESS) { LOGMESSAGE("Net server: AddPortMapping(%s, %s, %s) failed with code %d (%s)", psPort, psPort, internalIPAddress, ret, strupnperror(ret)); return NULL; } // Check that the port was actually forwarded. ret = UPNP_GetSpecificPortMappingEntry(urls.controlURL, data.first.servicetype, psPort, protocall, #if defined(MINIUPNPC_API_VERSION) && MINIUPNPC_API_VERSION >= 10 NULL/*remoteHost*/, #endif intClient, intPort, NULL/*desc*/, NULL/*enabled*/, duration); if (ret != UPNPCOMMAND_SUCCESS) { LOGMESSAGE("Net server: GetSpecificPortMappingEntry() failed with code %d (%s)", ret, strupnperror(ret)); return NULL; } LOGMESSAGE("Net server: External %s:%s %s is redirected to internal %s:%s (duration=%s)", externalIPAddress, psPort, protocall, intClient, intPort, duration); // Cache root descriptor URL to try to avoid discovery next time. g_ConfigDB.SetValueString(CFG_USER, "network.upnprootdescurl", urls.controlURL); g_ConfigDB.WriteFile(CFG_USER); LOGMESSAGE("Net server: cached UPnP root descriptor URL as %s", urls.controlURL); // Make sure everything is properly freed. if (allocatedUrls) FreeUPNPUrls(&urls); freeUPNPDevlist(devlist); return NULL; } #endif // CONFIG2_MINIUPNPC bool CNetServerWorker::SendMessage(ENetPeer* peer, const CNetMessage* message) { ENSURE(m_Host); CNetServerSession* session = static_cast(peer->data); return CNetHost::SendMessage(message, peer, DebugName(session).c_str()); } bool CNetServerWorker::Broadcast(const CNetMessage* message) { ENSURE(m_Host); bool ok = true; // Send to all sessions that are active and has finished authentication for (size_t i = 0; i < m_Sessions.size(); ++i) { if (m_Sessions[i]->GetCurrState() == NSS_PREGAME || m_Sessions[i]->GetCurrState() == NSS_INGAME) { if (!m_Sessions[i]->SendMessage(message)) ok = false; // TODO: this does lots of repeated message serialisation if we have lots // of remote peers; could do it more efficiently if that's a real problem } } return ok; } void* CNetServerWorker::RunThread(void* data) { debug_SetThreadName("NetServer"); static_cast(data)->Run(); return NULL; } void CNetServerWorker::Run() { // The script runtime uses the profiler and therefore the thread must be registered before the runtime is created g_Profiler2.RegisterCurrentThread("Net server"); // To avoid the need for JS_SetContextThread, we create and use and destroy // the script interface entirely within this network thread m_ScriptInterface = new ScriptInterface("Engine", "Net server", ScriptInterface::CreateRuntime(g_ScriptRuntime)); m_GameAttributes.set(m_ScriptInterface->GetJSRuntime(), JS::UndefinedValue()); while (true) { if (!RunStep()) break; // Implement autostart mode if (m_State == SERVER_STATE_PREGAME && (int)m_PlayerAssignments.size() == m_AutostartPlayers) StartGame(); // Update profiler stats m_Stats->LatchHostState(m_Host); } // Clear roots before deleting their context m_GameAttributes.clear(); m_SavedCommands.clear(); SAFE_DELETE(m_ScriptInterface); } bool CNetServerWorker::RunStep() { // Check for messages from the game thread. // (Do as little work as possible while the mutex is held open, // to avoid performance problems and deadlocks.) m_ScriptInterface->GetRuntime()->MaybeIncrementalGC(0.5f); JSContext* cx = m_ScriptInterface->GetContext(); JSAutoRequest rq(cx); std::vector > newAssignPlayer; std::vector newStartGame; std::vector > newPlayerReady; std::vector newPlayerResetReady; std::vector newGameAttributes; std::vector newTurnLength; { CScopeLock lock(m_WorkerMutex); if (m_Shutdown) return false; newStartGame.swap(m_StartGameQueue); newPlayerReady.swap(m_PlayerReadyQueue); newPlayerResetReady.swap(m_PlayerResetReadyQueue); newAssignPlayer.swap(m_AssignPlayerQueue); newGameAttributes.swap(m_GameAttributesQueue); newTurnLength.swap(m_TurnLengthQueue); } for (size_t i = 0; i < newAssignPlayer.size(); ++i) AssignPlayer(newAssignPlayer[i].first, newAssignPlayer[i].second); for (size_t i = 0; i < newPlayerReady.size(); ++i) SetPlayerReady(newPlayerReady[i].first, newPlayerReady[i].second); if (!newPlayerResetReady.empty()) ClearAllPlayerReady(); if (!newGameAttributes.empty()) { JS::RootedValue gameAttributesVal(cx); GetScriptInterface().ParseJSON(newGameAttributes.back(), &gameAttributesVal); UpdateGameAttributes(&gameAttributesVal); } if (!newTurnLength.empty()) SetTurnLength(newTurnLength.back()); // Do StartGame last, so we have the most up-to-date game attributes when we start if (!newStartGame.empty()) StartGame(); // Perform file transfers for (size_t i = 0; i < m_Sessions.size(); ++i) m_Sessions[i]->GetFileTransferer().Poll(); // Process network events: ENetEvent event; int status = enet_host_service(m_Host, &event, HOST_SERVICE_TIMEOUT); if (status < 0) { LOGERROR("CNetServerWorker: enet_host_service failed (%d)", status); // TODO: notify game that the server has shut down return false; } if (status == 0) { // Reached timeout with no events - try again return true; } // Process the event: switch (event.type) { case ENET_EVENT_TYPE_CONNECT: { // Report the client address char hostname[256] = "(error)"; enet_address_get_host_ip(&event.peer->address, hostname, ARRAY_SIZE(hostname)); LOGMESSAGE("Net server: Received connection from %s:%u", hostname, (unsigned int)event.peer->address.port); // Set up a session object for this peer CNetServerSession* session = new CNetServerSession(*this, event.peer); m_Sessions.push_back(session); SetupSession(session); ENSURE(event.peer->data == NULL); event.peer->data = session; HandleConnect(session); break; } case ENET_EVENT_TYPE_DISCONNECT: { // If there is an active session with this peer, then reset and delete it CNetServerSession* session = static_cast(event.peer->data); if (session) { LOGMESSAGE("Net server: Disconnected %s", DebugName(session).c_str()); // Remove the session first, so we won't send player-update messages to it // when updating the FSM m_Sessions.erase(remove(m_Sessions.begin(), m_Sessions.end(), session), m_Sessions.end()); session->Update((uint)NMT_CONNECTION_LOST, NULL); delete session; event.peer->data = NULL; } break; } case ENET_EVENT_TYPE_RECEIVE: { // If there is an active session with this peer, then process the message CNetServerSession* session = static_cast(event.peer->data); if (session) { // Create message from raw data CNetMessage* msg = CNetMessageFactory::CreateMessage(event.packet->data, event.packet->dataLength, GetScriptInterface()); if (msg) { LOGMESSAGE("Net server: Received message %s of size %lu from %s", msg->ToString().c_str(), (unsigned long)msg->GetSerializedLength(), DebugName(session).c_str()); HandleMessageReceive(msg, session); delete msg; } } // Done using the packet enet_packet_destroy(event.packet); break; } case ENET_EVENT_TYPE_NONE: break; } return true; } void CNetServerWorker::HandleMessageReceive(const CNetMessage* message, CNetServerSession* session) { // Handle non-FSM messages first Status status = session->GetFileTransferer().HandleMessageReceive(message); if (status != INFO::SKIPPED) return; if (message->GetType() == NMT_FILE_TRANSFER_REQUEST) { CFileTransferRequestMessage* reqMessage = (CFileTransferRequestMessage*)message; // Rejoining client got our JoinSyncStart after we received the state from // another client, and has now requested that we forward it to them ENSURE(!m_JoinSyncFile.empty()); session->GetFileTransferer().StartResponse(reqMessage->m_RequestID, m_JoinSyncFile); return; } // Update FSM bool ok = session->Update(message->GetType(), (void*)message); if (!ok) LOGERROR("Net server: Error running FSM update (type=%d state=%d)", (int)message->GetType(), (int)session->GetCurrState()); } void CNetServerWorker::SetupSession(CNetServerSession* session) { void* context = session; // Set up transitions for session session->AddTransition(NSS_UNCONNECTED, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED); session->AddTransition(NSS_HANDSHAKE, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED); session->AddTransition(NSS_HANDSHAKE, (uint)NMT_CLIENT_HANDSHAKE, NSS_AUTHENTICATE, (void*)&OnClientHandshake, context); session->AddTransition(NSS_AUTHENTICATE, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED); session->AddTransition(NSS_AUTHENTICATE, (uint)NMT_AUTHENTICATE, NSS_PREGAME, (void*)&OnAuthenticate, context); session->AddTransition(NSS_PREGAME, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED, (void*)&OnDisconnect, context); session->AddTransition(NSS_PREGAME, (uint)NMT_CHAT, NSS_PREGAME, (void*)&OnChat, context); session->AddTransition(NSS_PREGAME, (uint)NMT_READY, NSS_PREGAME, (void*)&OnReady, context); session->AddTransition(NSS_PREGAME, (uint)NMT_LOADED_GAME, NSS_INGAME, (void*)&OnLoadedGame, context); session->AddTransition(NSS_JOIN_SYNCING, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED, (void*)&OnDisconnect, context); session->AddTransition(NSS_JOIN_SYNCING, (uint)NMT_LOADED_GAME, NSS_INGAME, (void*)&OnJoinSyncingLoadedGame, context); session->AddTransition(NSS_INGAME, (uint)NMT_REJOINED, NSS_INGAME, (void*)&OnRejoined, context); session->AddTransition(NSS_INGAME, (uint)NMT_CONNECTION_LOST, NSS_UNCONNECTED, (void*)&OnDisconnect, context); session->AddTransition(NSS_INGAME, (uint)NMT_CHAT, NSS_INGAME, (void*)&OnChat, context); session->AddTransition(NSS_INGAME, (uint)NMT_SIMULATION_COMMAND, NSS_INGAME, (void*)&OnInGame, context); session->AddTransition(NSS_INGAME, (uint)NMT_SYNC_CHECK, NSS_INGAME, (void*)&OnInGame, context); session->AddTransition(NSS_INGAME, (uint)NMT_END_COMMAND_BATCH, NSS_INGAME, (void*)&OnInGame, context); // Set first state session->SetFirstState(NSS_HANDSHAKE); } bool CNetServerWorker::HandleConnect(CNetServerSession* session) { CSrvHandshakeMessage handshake; handshake.m_Magic = PS_PROTOCOL_MAGIC; handshake.m_ProtocolVersion = PS_PROTOCOL_VERSION; handshake.m_SoftwareVersion = PS_PROTOCOL_VERSION; return session->SendMessage(&handshake); } void CNetServerWorker::OnUserJoin(CNetServerSession* session) { AddPlayer(session->GetGUID(), session->GetUserName()); CGameSetupMessage gameSetupMessage(GetScriptInterface()); gameSetupMessage.m_Data = m_GameAttributes.get(); session->SendMessage(&gameSetupMessage); CPlayerAssignmentMessage assignMessage; ConstructPlayerAssignmentMessage(assignMessage); session->SendMessage(&assignMessage); } void CNetServerWorker::OnUserLeave(CNetServerSession* session) { RemovePlayer(session->GetGUID()); if (m_ServerTurnManager && session->GetCurrState() != NSS_JOIN_SYNCING) m_ServerTurnManager->UninitialiseClient(session->GetHostID()); // TODO: only for non-observers // TODO: ought to switch the player controlled by that client // back to AI control, or something? } void CNetServerWorker::AddPlayer(const CStr& guid, const CStrW& name) { // Find all player IDs in active use; we mustn't give them to a second player (excluding the unassigned ID: -1) std::set usedIDs; for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) if (it->second.m_Enabled && it->second.m_PlayerID != -1) usedIDs.insert(it->second.m_PlayerID); // If the player is rejoining after disconnecting, try to give them // back their old player ID i32 playerID = -1; // Try to match GUID first for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) { if (!it->second.m_Enabled && it->first == guid && usedIDs.find(it->second.m_PlayerID) == usedIDs.end()) { playerID = it->second.m_PlayerID; m_PlayerAssignments.erase(it); // delete the old mapping, since we've got a new one now goto found; } } // Try to match username next for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) { if (!it->second.m_Enabled && it->second.m_Name == name && usedIDs.find(it->second.m_PlayerID) == usedIDs.end()) { playerID = it->second.m_PlayerID; m_PlayerAssignments.erase(it); // delete the old mapping, since we've got a new one now goto found; } } // Otherwise leave the player ID as -1 (observer) and let gamesetup change it as needed. found: PlayerAssignment assignment; assignment.m_Enabled = true; assignment.m_Name = name; assignment.m_PlayerID = playerID; assignment.m_Status = 0; m_PlayerAssignments[guid] = assignment; // Send the new assignments to all currently active players // (which does not include the one that's just joining) SendPlayerAssignments(); } void CNetServerWorker::RemovePlayer(const CStr& guid) { m_PlayerAssignments[guid].m_Enabled = false; SendPlayerAssignments(); } void CNetServerWorker::SetPlayerReady(const CStr& guid, const int ready) { m_PlayerAssignments[guid].m_Status = ready; SendPlayerAssignments(); } void CNetServerWorker::ClearAllPlayerReady() { for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) it->second.m_Status = 0; SendPlayerAssignments(); } void CNetServerWorker::AssignPlayer(int playerID, const CStr& guid) { // Remove anyone who's already assigned to this player for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) { if (it->second.m_PlayerID == playerID) it->second.m_PlayerID = -1; } // Update this host's assignment if it exists if (m_PlayerAssignments.find(guid) != m_PlayerAssignments.end()) m_PlayerAssignments[guid].m_PlayerID = playerID; SendPlayerAssignments(); } void CNetServerWorker::ConstructPlayerAssignmentMessage(CPlayerAssignmentMessage& message) { for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end(); ++it) { if (!it->second.m_Enabled) continue; CPlayerAssignmentMessage::S_m_Hosts h; h.m_GUID = it->first; h.m_Name = it->second.m_Name; h.m_PlayerID = it->second.m_PlayerID; h.m_Status = it->second.m_Status; message.m_Hosts.push_back(h); } } void CNetServerWorker::SendPlayerAssignments() { CPlayerAssignmentMessage message; ConstructPlayerAssignmentMessage(message); Broadcast(&message); } ScriptInterface& CNetServerWorker::GetScriptInterface() { return *m_ScriptInterface; } void CNetServerWorker::SetTurnLength(u32 msecs) { if (m_ServerTurnManager) m_ServerTurnManager->SetTurnLength(msecs); } bool CNetServerWorker::OnClientHandshake(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_CLIENT_HANDSHAKE); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CCliHandshakeMessage* message = (CCliHandshakeMessage*)event->GetParamRef(); if (message->m_ProtocolVersion != PS_PROTOCOL_VERSION) { session->Disconnect(NDR_INCORRECT_PROTOCOL_VERSION); return false; } CSrvHandshakeResponseMessage handshakeResponse; handshakeResponse.m_UseProtocolVersion = PS_PROTOCOL_VERSION; handshakeResponse.m_Message = server.m_WelcomeMessage; handshakeResponse.m_Flags = 0; session->SendMessage(&handshakeResponse); return true; } bool CNetServerWorker::OnAuthenticate(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_AUTHENTICATE); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); // Prohibit joins while the game is loading if (server.m_State == SERVER_STATE_LOADING) { LOGMESSAGE("Refused connection while the game is loading"); session->Disconnect(NDR_SERVER_LOADING); return true; } CAuthenticateMessage* message = (CAuthenticateMessage*)event->GetParamRef(); CStrW username = server.DeduplicatePlayerName(SanitisePlayerName(message->m_Name)); // Optionally allow observers to join after the game has started bool observerLateJoin = false; ScriptInterface& scriptInterface = server.GetScriptInterface(); JSContext* cx = scriptInterface.GetContext(); JSAutoRequest rq(cx); JS::RootedValue settings(cx); scriptInterface.GetProperty(server.m_GameAttributes.get(), "settings", &settings); if (scriptInterface.HasProperty(settings, "ObserverLateJoin")) scriptInterface.GetProperty(settings, "ObserverLateJoin", observerLateJoin); // If the game has already started, only allow rejoins bool isRejoining = false; if (server.m_State != SERVER_STATE_PREGAME) { // Search for an old disconnected player of the same name // (TODO: if GUIDs were stable, we should use them instead) isRejoining = observerLateJoin || std::find_if( server.m_PlayerAssignments.begin(), server.m_PlayerAssignments.end(), [&username] (const std::pair& pair) { return !pair.second.m_Enabled && pair.second.m_Name == username; }) != server.m_PlayerAssignments.end(); // Players who weren't already in the game are not allowed to join now that it's started if (!isRejoining) { LOGMESSAGE("Refused connection after game start from not-previously-known user \"%s\"", utf8_from_wstring(username)); session->Disconnect(NDR_SERVER_ALREADY_IN_GAME); return true; } } // TODO: check server password etc? u32 newHostID = server.m_NextHostID++; session->SetUserName(username); session->SetGUID(message->m_GUID); session->SetHostID(newHostID); CAuthenticateResultMessage authenticateResult; authenticateResult.m_Code = isRejoining ? ARC_OK_REJOINING : ARC_OK; authenticateResult.m_HostID = newHostID; authenticateResult.m_Message = L"Logged in"; session->SendMessage(&authenticateResult); server.OnUserJoin(session); if (isRejoining) { // Request a copy of the current game state from an existing player, // so we can send it on to the new player // Assume session 0 is most likely the local player, so they're // the most efficient client to request a copy from CNetServerSession* sourceSession = server.m_Sessions.at(0); sourceSession->GetFileTransferer().StartTask( shared_ptr(new CNetFileReceiveTask_ServerRejoin(server, newHostID)) ); session->SetNextState(NSS_JOIN_SYNCING); } return true; } bool CNetServerWorker::OnInGame(void* context, CFsmEvent* event) { // TODO: should split each of these cases into a separate method CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CNetMessage* message = (CNetMessage*)event->GetParamRef(); if (message->GetType() == (uint)NMT_SIMULATION_COMMAND) { CSimulationMessage* simMessage = static_cast (message); + // Ignore messages sent by one player on behalf of another player + // unless cheating is enabled + bool cheatsEnabled = false; + ScriptInterface& scriptInterface = server.GetScriptInterface(); + JSContext* cx = scriptInterface.GetContext(); + JSAutoRequest rq(cx); + JS::RootedValue settings(cx); + scriptInterface.GetProperty(server.m_GameAttributes.get(), "settings", &settings); + if (scriptInterface.HasProperty(settings, "CheatsEnabled")) + scriptInterface.GetProperty(settings, "CheatsEnabled", cheatsEnabled); + + PlayerAssignmentMap::iterator it = server.m_PlayerAssignments.find(session->GetGUID()); + // When cheating is disabled, fail if the player the message claims to + // represent does not exist or does not match the sender's player name + if (!cheatsEnabled && (it == server.m_PlayerAssignments.end() || it->second.m_PlayerID != simMessage->m_Player)) + return true; + // Send it back to all clients immediately server.Broadcast(simMessage); // Save all the received commands if (server.m_SavedCommands.size() < simMessage->m_Turn + 1) server.m_SavedCommands.resize(simMessage->m_Turn + 1); server.m_SavedCommands[simMessage->m_Turn].push_back(*simMessage); - // TODO: we should do some validation of ownership (clients can't send commands on behalf of opposing players) - // TODO: we shouldn't send the message back to the client that first sent it } else if (message->GetType() == (uint)NMT_SYNC_CHECK) { CSyncCheckMessage* syncMessage = static_cast (message); server.m_ServerTurnManager->NotifyFinishedClientUpdate(session->GetHostID(), session->GetUserName(), syncMessage->m_Turn, syncMessage->m_Hash); } else if (message->GetType() == (uint)NMT_END_COMMAND_BATCH) { CEndCommandBatchMessage* endMessage = static_cast (message); server.m_ServerTurnManager->NotifyFinishedClientCommands(session->GetHostID(), endMessage->m_Turn); } return true; } bool CNetServerWorker::OnChat(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_CHAT); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CChatMessage* message = (CChatMessage*)event->GetParamRef(); message->m_GUID = session->GetGUID(); server.Broadcast(message); return true; } bool CNetServerWorker::OnReady(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_READY); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CReadyMessage* message = (CReadyMessage*)event->GetParamRef(); message->m_GUID = session->GetGUID(); server.Broadcast(message); return true; } bool CNetServerWorker::OnLoadedGame(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_LOADED_GAME); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); // We're in the loading state, so wait until every player has loaded before // starting the game ENSURE(server.m_State == SERVER_STATE_LOADING); server.CheckGameLoadStatus(session); return true; } bool CNetServerWorker::OnJoinSyncingLoadedGame(void* context, CFsmEvent* event) { // A client rejoining an in-progress game has now finished loading the // map and deserialized the initial state. // The simulation may have progressed since then, so send any subsequent // commands to them and set them as an active player so they can participate // in all future turns. // // (TODO: if it takes a long time for them to receive and execute all these // commands, the other players will get frozen for that time and may be unhappy; // we could try repeating this process a few times until the client converges // on the up-to-date state, before setting them as active.) ENSURE(event->GetType() == (uint)NMT_LOADED_GAME); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CLoadedGameMessage* message = (CLoadedGameMessage*)event->GetParamRef(); u32 turn = message->m_CurrentTurn; u32 readyTurn = server.m_ServerTurnManager->GetReadyTurn(); // Send them all commands received since their saved state, // and turn-ended messages for any turns that have already been processed for (size_t i = turn + 1; i < std::max(readyTurn+1, (u32)server.m_SavedCommands.size()); ++i) { if (i < server.m_SavedCommands.size()) for (size_t j = 0; j < server.m_SavedCommands[i].size(); ++j) session->SendMessage(&server.m_SavedCommands[i][j]); if (i <= readyTurn) { CEndCommandBatchMessage endMessage; endMessage.m_Turn = i; endMessage.m_TurnLength = server.m_ServerTurnManager->GetSavedTurnLength(i); session->SendMessage(&endMessage); } } // Tell the turn manager to expect commands from this new client server.m_ServerTurnManager->InitialiseClient(session->GetHostID(), readyTurn); // Tell the client that everything has finished loading and it should start now CLoadedGameMessage loaded; loaded.m_CurrentTurn = readyTurn; session->SendMessage(&loaded); return true; } bool CNetServerWorker::OnRejoined(void* context, CFsmEvent* event) { // A client has finished rejoining and the loading screen disappeared. ENSURE(event->GetType() == (uint)NMT_REJOINED); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); CRejoinedMessage* message = (CRejoinedMessage*)event->GetParamRef(); message->m_GUID = session->GetGUID(); server.Broadcast(message); return true; } bool CNetServerWorker::OnDisconnect(void* context, CFsmEvent* event) { ENSURE(event->GetType() == (uint)NMT_CONNECTION_LOST); CNetServerSession* session = (CNetServerSession*)context; CNetServerWorker& server = session->GetServer(); server.OnUserLeave(session); return true; } void CNetServerWorker::CheckGameLoadStatus(CNetServerSession* changedSession) { for (size_t i = 0; i < m_Sessions.size(); ++i) { if (m_Sessions[i] != changedSession && m_Sessions[i]->GetCurrState() != NSS_INGAME) return; } CLoadedGameMessage loaded; loaded.m_CurrentTurn = 0; Broadcast(&loaded); m_State = SERVER_STATE_INGAME; } void CNetServerWorker::StartGame() { m_ServerTurnManager = new CNetServerTurnManager(*this); for (size_t i = 0; i < m_Sessions.size(); ++i) m_ServerTurnManager->InitialiseClient(m_Sessions[i]->GetHostID(), 0); // TODO: only for non-observers m_State = SERVER_STATE_LOADING; // Send the final setup state to all clients UpdateGameAttributes(&m_GameAttributes.get()); // Remove players and observers that are not present when the game starts for (PlayerAssignmentMap::iterator it = m_PlayerAssignments.begin(); it != m_PlayerAssignments.end();) if (it->second.m_Enabled) ++it; else it = m_PlayerAssignments.erase(it); SendPlayerAssignments(); CGameStartMessage gameStart; Broadcast(&gameStart); } void CNetServerWorker::UpdateGameAttributes(JS::MutableHandleValue attrs) { m_GameAttributes.set(m_ScriptInterface->GetJSRuntime(), attrs); if (!m_Host) return; CGameSetupMessage gameSetupMessage(GetScriptInterface()); gameSetupMessage.m_Data.set(m_GameAttributes.get()); Broadcast(&gameSetupMessage); } CStrW CNetServerWorker::SanitisePlayerName(const CStrW& original) { const size_t MAX_LENGTH = 32; CStrW name = original; name.Replace(L"[", L"{"); // remove GUI tags name.Replace(L"]", L"}"); // remove for symmetry // Restrict the length if (name.length() > MAX_LENGTH) name = name.Left(MAX_LENGTH); // Don't allow surrounding whitespace name.Trim(PS_TRIM_BOTH); // Don't allow empty name if (name.empty()) name = L"Anonymous"; return name; } CStrW CNetServerWorker::DeduplicatePlayerName(const CStrW& original) { CStrW name = original; // Try names "Foo", "Foo (2)", "Foo (3)", etc size_t id = 2; while (true) { bool unique = true; for (size_t i = 0; i < m_Sessions.size(); ++i) { if (m_Sessions[i]->GetUserName() == name) { unique = false; break; } } if (unique) return name; name = original + L" (" + CStrW::FromUInt(id++) + L")"; } } CNetServer::CNetServer(int autostartPlayers) : m_Worker(new CNetServerWorker(autostartPlayers)) { } CNetServer::~CNetServer() { delete m_Worker; } bool CNetServer::SetupConnection() { return m_Worker->SetupConnection(); } void CNetServer::AssignPlayer(int playerID, const CStr& guid) { CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_AssignPlayerQueue.emplace_back(playerID, guid); } void CNetServer::SetPlayerReady(const CStr& guid, int ready) { CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_PlayerReadyQueue.emplace_back(guid, ready); } void CNetServer::ClearAllPlayerReady() { CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_PlayerResetReadyQueue.push_back(false); } void CNetServer::StartGame() { CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_StartGameQueue.push_back(true); } void CNetServer::UpdateGameAttributes(JS::MutableHandleValue attrs, ScriptInterface& scriptInterface) { // Pass the attributes as JSON, since that's the easiest safe // cross-thread way of passing script data std::string attrsJSON = scriptInterface.StringifyJSON(attrs, false); CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_GameAttributesQueue.push_back(attrsJSON); } void CNetServer::SetTurnLength(u32 msecs) { CScopeLock lock(m_Worker->m_WorkerMutex); m_Worker->m_TurnLengthQueue.push_back(msecs); }