void Server::ProcessData(NetworkPacket *pkt) { DSTACK(__FUNCTION_NAME); // Environment is locked first. //JMutexAutoLock envlock(m_env_mutex); ScopeProfiler sp(g_profiler, "Server::ProcessData"); auto peer_id = pkt->getPeerId(); std::string addr_s; try{ Address address = getPeerAddress(peer_id); addr_s = address.serializeString(); // drop player if is ip is banned if(m_banmanager->isIpBanned(addr_s)){ std::string ban_name = m_banmanager->getBanName(addr_s); infostream<<"Server: A banned client tried to connect from " <<addr_s<<"; banned name was " <<ban_name<<std::endl; // This actually doesn't seem to transfer to the client DenyAccess(peer_id, std::string("Your ip is banned. Banned name was ") + ban_name); return; } } catch(con::PeerNotFoundException &e) { /* * no peer for this packet found * most common reason is peer timeout, e.g. peer didn't * respond for some time, your server was overloaded or * things like that. */ verbosestream<<"Server::ProcessData(): Canceling: peer " <<peer_id<<" not found"<<std::endl; return; } try { auto datasize = pkt->getSize(); if(datasize < 2) return; int command; std::map<int, msgpack::object> packet; msgpack::unpacked msg; if (!con::parse_msgpack_packet(pkt->getString(0), datasize, &packet, &command, &msg)) { verbosestream<<"Server: Ignoring broken packet from " <<addr_s<<" (peer_id="<<peer_id<<")"<<std::endl; return; } if(command == TOSERVER_INIT_LEGACY) { RemoteClient* client = getClient(peer_id, CS_Created); // If net_proto_version is set, this client has already been handled if(client->getState() > CS_Created) { verbosestream<<"Server: Ignoring multiple TOSERVER_INITs from " <<addr_s<<" (peer_id="<<peer_id<<")"<<std::endl; return; } verbosestream<<"Server: Got TOSERVER_INIT from "<<addr_s<<" (peer_id=" <<peer_id<<")"<<std::endl; // Do not allow multiple players in simple singleplayer mode. // This isn't a perfect way to do it, but will suffice for now if(m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1){ infostream<<"Server: Not allowing another client ("<<addr_s <<") to connect in simple singleplayer mode"<<std::endl; DenyAccess(peer_id, "Running in simple singleplayer mode."); return; } // First byte after command is maximum supported // serialization version u8 client_max; packet[TOSERVER_INIT_FMT].convert(&client_max); u8 our_max = SER_FMT_VER_HIGHEST_READ; // Use the highest version supported by both int deployed = std::min(client_max, our_max); // If it's lower than the lowest supported, give up. if(deployed < SER_FMT_CLIENT_VER_LOWEST) deployed = SER_FMT_VER_INVALID; if(deployed == SER_FMT_VER_INVALID) { actionstream<<"Server: A mismatched client tried to connect from " <<addr_s<<std::endl; infostream<<"Server: Cannot negotiate serialization version with " <<addr_s<<std::endl; DenyAccess(peer_id, std::string( "Your client's version is not supported.\n" "Server version is ") + (g_version_string) + "." ); return; } client->setPendingSerializationVersion(deployed); /* Read and check network protocol version */ u16 min_net_proto_version = 0; packet[TOSERVER_INIT_PROTOCOL_VERSION_MIN].convert(&min_net_proto_version); u16 max_net_proto_version = min_net_proto_version; packet[TOSERVER_INIT_PROTOCOL_VERSION_MAX].convert(&max_net_proto_version); // Start with client's maximum version u16 net_proto_version = max_net_proto_version; // Figure out a working version if it is possible at all if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN || min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) { // If maximum is larger than our maximum, go with our maximum if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX) net_proto_version = SERVER_PROTOCOL_VERSION_MAX; // Else go with client's maximum else net_proto_version = max_net_proto_version; } verbosestream<<"Server: "<<addr_s<<": Protocol version: min: " <<min_net_proto_version<<", max: "<<max_net_proto_version <<", chosen: "<<net_proto_version<<std::endl; client->net_proto_version = net_proto_version; if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN || net_proto_version > SERVER_PROTOCOL_VERSION_MAX) { actionstream<<"Server: A mismatched client tried to connect from " <<addr_s<<std::endl; DenyAccess(peer_id, std::string( "Your client's version is not supported.\n" "Server version is ") + (g_version_string) + ",\n" + "server's PROTOCOL_VERSION is " + itos(SERVER_PROTOCOL_VERSION_MIN) + "..." + itos(SERVER_PROTOCOL_VERSION_MAX) + ", client's PROTOCOL_VERSION is " + itos(min_net_proto_version) + "..." + itos(max_net_proto_version) ); return; } if(g_settings->getBool("strict_protocol_version_checking")) { if(net_proto_version != LATEST_PROTOCOL_VERSION) { actionstream<<"Server: A mismatched (strict) client tried to " <<"connect from "<<addr_s<<std::endl; DenyAccess(peer_id, std::string( "Your client's version is not supported.\n" "Server version is ") + (g_version_string) + ",\n" + "server's PROTOCOL_VERSION (strict) is " + itos(LATEST_PROTOCOL_VERSION) + ", client's PROTOCOL_VERSION is " + itos(min_net_proto_version) + "..." + itos(max_net_proto_version) ); return; } } /* Set up player */ // Get player name std::string playername; packet[TOSERVER_INIT_NAME].convert(&playername); if(playername.empty()) { actionstream<<"Server: Player with an empty name " <<"tried to connect from "<<addr_s<<std::endl; DenyAccess(peer_id, "Empty name"); return; } if(!g_settings->getBool("enable_any_name") && string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false) { actionstream<<"Server: Player with an invalid name ["<<playername <<"] tried to connect from "<<addr_s<<std::endl; DenyAccess(peer_id, "Name contains unallowed characters"); return; } if(!isSingleplayer() && playername == "singleplayer") { actionstream<<"Server: Player with the name \"singleplayer\" " <<"tried to connect from "<<addr_s<<std::endl; DenyAccess(peer_id, "Name is not allowed"); return; } { std::string reason; if(m_script->on_prejoinplayer(playername, addr_s, reason)) { actionstream<<"Server: Player with the name \""<<playername<<"\" " <<"tried to connect from "<<addr_s<<" " <<"but it was disallowed for the following reason: " <<reason<<std::endl; DenyAccess(peer_id, reason); return; } } infostream<<"Server: New connection: \""<<playername<<"\" from " <<addr_s<<" (peer_id="<<peer_id<<")"<<std::endl; // Get password std::string given_password; packet[TOSERVER_INIT_PASSWORD].convert(&given_password); if(!base64_is_valid(given_password.c_str())){ actionstream<<"Server: "<<playername <<" supplied invalid password hash"<<std::endl; DenyAccess(peer_id, "Invalid password hash"); return; } // Enforce user limit. // Don't enforce for users that have some admin right if(m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") && !checkPriv(playername, "server") && !checkPriv(playername, "ban") && !checkPriv(playername, "privs") && !checkPriv(playername, "password") && playername != g_settings->get("name")) { actionstream<<"Server: "<<playername<<" tried to join, but there" <<" are already max_users=" <<g_settings->getU16("max_users")<<" players."<<std::endl; DenyAccess(peer_id, "Too many users."); return; } std::string checkpwd; // Password hash to check against bool has_auth = m_script->getAuth(playername, &checkpwd, NULL); // If no authentication info exists for user, create it if(!has_auth){ if(!isSingleplayer() && g_settings->getBool("disallow_empty_password") && given_password == ""){ actionstream<<"Server: "<<playername <<" supplied empty password"<<std::endl; DenyAccess(peer_id, "Empty passwords are " "disallowed. Set a password and try again."); return; } std::string raw_default_password = g_settings->get("default_password"); std::string initial_password = translatePassword(playername, raw_default_password); // If default_password is empty, allow any initial password if (raw_default_password.length() == 0) initial_password = given_password; m_script->createAuth(playername, initial_password); } has_auth = m_script->getAuth(playername, &checkpwd, NULL); if(!has_auth){ actionstream<<"Server: "<<playername<<" cannot be authenticated" <<" (auth handler does not work?)"<<std::endl; DenyAccess(peer_id, "Not allowed to login"); return; } if(given_password != checkpwd){ actionstream<<"Server: "<<playername<<" supplied wrong password" <<std::endl; DenyAccess(peer_id, "Wrong password"); return; } RemotePlayer *player = static_cast<RemotePlayer*>(m_env->getPlayer(playername.c_str())); if(player && player->peer_id != 0){ errorstream<<"Server: "<<playername<<": Failed to emerge player" <<" (player allocated to an another client)"<<std::endl; DenyAccess(peer_id, "Another client is connected with this " "name. If your client closed unexpectedly, try again in " "a minute."); } m_clients.setPlayerName(peer_id,playername); /* Answer with a TOCLIENT_INIT */ { MSGPACK_PACKET_INIT(TOCLIENT_INIT, 4); PACK(TOCLIENT_INIT_DEPLOYED, deployed); PACK(TOCLIENT_INIT_SEED, m_env->getServerMap().getSeed()); PACK(TOCLIENT_INIT_STEP, g_settings->getFloat("dedicated_server_step")); //if (player) //todo : remake me // PACK(TOCLIENT_INIT_POS, player->getPosition()); Settings params; m_emerge->params.save(params); PACK(TOCLIENT_INIT_MAP_PARAMS, params); // Send as reliable m_clients.send(peer_id, 0, buffer, true); m_clients.event(peer_id, CSE_Init); } return; } if(command == TOSERVER_INIT2) { verbosestream<<"Server: Got TOSERVER_INIT2 from " <<peer_id<<std::endl; m_clients.event(peer_id, CSE_GotInit2); u16 protocol_version = m_clients.getProtocolVersion(peer_id); ///// begin compatibility code PlayerSAO* playersao = NULL; if (protocol_version <= 22) { playersao = StageTwoClientInit(peer_id); if (playersao == NULL) { errorstream << "TOSERVER_INIT2 stage 2 client init failed for peer " << peer_id << std::endl; return; } } ///// end compatibility code /* Send some initialization data */ infostream<<"Server: Sending content to " <<getPlayerName(peer_id)<<std::endl; // Send player movement settings SendMovement(peer_id); // Send item definitions SendItemDef(peer_id, m_itemdef, protocol_version); // Send node definitions SendNodeDef(peer_id, m_nodedef, protocol_version); m_clients.event(peer_id, CSE_SetDefinitionsSent); // Send media announcement sendMediaAnnouncement(peer_id); // Send detached inventories sendDetachedInventories(peer_id); // Send time of day u16 time = m_env->getTimeOfDay(); float time_speed = g_settings->getFloat("time_speed"); SendTimeOfDay(peer_id, time, time_speed); ///// begin compatibility code if (protocol_version <= 22) { m_clients.event(peer_id, CSE_SetClientReady); m_script->on_joinplayer(playersao); } ///// end compatibility code // Warnings about protocol version can be issued here if(getClient(peer_id)->net_proto_version < LATEST_PROTOCOL_VERSION) { SendChatMessage(peer_id, "# Server: WARNING: YOUR CLIENT'S " "VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!"); } return; } u8 peer_ser_ver = getClient(peer_id, CS_InitDone)->serialization_version; u16 peer_proto_ver = getClient(peer_id, CS_InitDone)->net_proto_version; if(peer_ser_ver == SER_FMT_VER_INVALID) { errorstream<<"Server::ProcessData(): Canceling: Peer" " serialization format invalid or not initialized." " Skipping incoming command="<<command<<std::endl; return; } /* Handle commands relate to client startup */ if(command == TOSERVER_REQUEST_MEDIA) { std::vector<std::string> tosend; packet[TOSERVER_REQUEST_MEDIA_FILES].convert(&tosend); sendRequestedMedia(peer_id, tosend); return; } else if(command == TOSERVER_RECEIVED_MEDIA) { return; } else if(command == TOSERVER_CLIENT_READY) { // clients <= protocol version 22 did not send ready message, // they're already initialized if (peer_proto_ver <= 22) { infostream << "Client sent message not expected by a " << "client using protocol version <= 22," << "disconnecting peer_id: " << peer_id << std::endl; m_con.DisconnectPeer(peer_id); return; } PlayerSAO* playersao = StageTwoClientInit(peer_id); // If failed, cancel if (playersao == NULL) { errorstream << "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: " << peer_id << std::endl; m_con.DisconnectPeer(peer_id); return; } m_clients.setClientVersion( peer_id, packet[TOSERVER_CLIENT_READY_VERSION_MAJOR].as<int>(), packet[TOSERVER_CLIENT_READY_VERSION_MINOR].as<int>(), 0, // packet[TOSERVER_CLIENT_READY_VERSION_PATCH].as<int>(), TODO packet[TOSERVER_CLIENT_READY_VERSION_STRING].as<std::string>() ); m_clients.event(peer_id, CSE_SetClientReady); m_script->on_joinplayer(playersao); stat.add("join", playersao->getPlayer()->getName()); } if (m_clients.getClientState(peer_id) < CS_Active) { if (command == TOSERVER_PLAYERPOS) return; errorstream<<"Got packet command: " << command << " for peer id " << peer_id << " but client isn't active yet. Dropping packet " <<std::endl; return; } Player *player = m_env->getPlayer(peer_id); if(player == NULL) { /* verbosestream<<"Server::ProcessData(): Canceling: " "No player for peer_id="<<peer_id << " disconnecting peer!" <<std::endl; */ m_con.DisconnectPeer(peer_id); return; } PlayerSAO *playersao = player->getPlayerSAO(); if(playersao == NULL) { errorstream<<"Server::ProcessData(): Canceling: " "No player object for peer_id="<<peer_id << " disconnecting peer!" <<std::endl; m_con.DisconnectPeer(peer_id); return; } if(command == TOSERVER_PLAYERPOS) { // If player is dead we don't care of this packet if (player->hp != 0 && playersao->m_ms_from_last_respawn > 1000) player->setPosition(packet[TOSERVER_PLAYERPOS_POSITION].as<v3f>()); player->setSpeed(packet[TOSERVER_PLAYERPOS_SPEED].as<v3f>()); player->setPitch(modulo360f(packet[TOSERVER_PLAYERPOS_PITCH].as<f32>())); player->setYaw(modulo360f(packet[TOSERVER_PLAYERPOS_YAW].as<f32>())); u32 keyPressed = packet[TOSERVER_PLAYERPOS_KEY_PRESSED].as<u32>(); player->keyPressed = keyPressed; player->control.up = (bool)(keyPressed&1); player->control.down = (bool)(keyPressed&2); player->control.left = (bool)(keyPressed&4); player->control.right = (bool)(keyPressed&8); player->control.jump = (bool)(keyPressed&16); player->control.aux1 = (bool)(keyPressed&32); player->control.sneak = (bool)(keyPressed&64); player->control.LMB = (bool)(keyPressed&128); player->control.RMB = (bool)(keyPressed&256); auto old_pos = playersao->m_last_good_position; if(playersao->checkMovementCheat()){ // Call callbacks m_script->on_cheat(playersao, "moved_too_fast"); SendMovePlayer(peer_id); } else if (playersao->m_ms_from_last_respawn > 3000) { auto dist = (old_pos/BS).getDistanceFrom(playersao->m_last_good_position/BS); if (dist) stat.add("move", playersao->getPlayer()->getName(), dist); } if (playersao->m_ms_from_last_respawn > 2000) { auto obj = playersao; // copypasted from server step: auto uptime = m_uptime.get(); if (!obj->m_uptime_last) // not very good place, but minimum modifications obj->m_uptime_last = uptime - 0.1; if (uptime - obj->m_uptime_last > 0.5) { obj->step(uptime - obj->m_uptime_last, true); //todo: maybe limit count per time obj->m_uptime_last = uptime; } } /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to " <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")" <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/ } else if(command == TOSERVER_DELETEDBLOCKS) { std::vector<v3s16> deleted_blocks; packet[TOSERVER_DELETEDBLOCKS_DATA].convert(&deleted_blocks); RemoteClient *client = getClient(peer_id); for (auto &block : deleted_blocks) client->SetBlockDeleted(block); } else if(command == TOSERVER_INVENTORY_ACTION) { std::string datastring; packet[TOSERVER_INVENTORY_ACTION_DATA].convert(&datastring); std::istringstream is(datastring, std::ios_base::binary); // Create an action InventoryAction *a = InventoryAction::deSerialize(is); if(a == NULL) { infostream<<"TOSERVER_INVENTORY_ACTION: " <<"InventoryAction::deSerialize() returned NULL" <<std::endl; return; } // If something goes wrong, this player is to blame RollbackScopeActor rollback_scope(m_rollback, std::string("player:")+player->getName()); /* Note: Always set inventory not sent, to repair cases where the client made a bad prediction. */ /* Handle restrictions and special cases of the move action */ if(a->getType() == IACTION_MOVE) { IMoveAction *ma = (IMoveAction*)a; ma->from_inv.applyCurrentPlayer(player->getName()); ma->to_inv.applyCurrentPlayer(player->getName()); setInventoryModified(ma->from_inv, false); setInventoryModified(ma->to_inv, false); bool from_inv_is_current_player = (ma->from_inv.type == InventoryLocation::PLAYER) && (ma->from_inv.name == player->getName()); bool to_inv_is_current_player = (ma->to_inv.type == InventoryLocation::PLAYER) && (ma->to_inv.name == player->getName()); /* Disable moving items out of craftpreview */ if(ma->from_list == "craftpreview") { infostream<<"Ignoring IMoveAction from " <<(ma->from_inv.dump())<<":"<<ma->from_list <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list <<" because src is "<<ma->from_list<<std::endl; delete a; return; } /* Disable moving items into craftresult and craftpreview */ if(ma->to_list == "craftpreview" || ma->to_list == "craftresult") { infostream<<"Ignoring IMoveAction from " <<(ma->from_inv.dump())<<":"<<ma->from_list <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list <<" because dst is "<<ma->to_list<<std::endl; delete a; return; } // Disallow moving items in elsewhere than player's inventory // if not allowed to interact if(!checkPriv(player->getName(), "interact") && (!from_inv_is_current_player || !to_inv_is_current_player)) { infostream<<"Cannot move outside of player's inventory: " <<"No interact privilege"<<std::endl; delete a; return; } } /* Handle restrictions and special cases of the drop action */ else if(a->getType() == IACTION_DROP) { IDropAction *da = (IDropAction*)a; da->from_inv.applyCurrentPlayer(player->getName()); setInventoryModified(da->from_inv, false); /* Disable dropping items out of craftpreview */ if(da->from_list == "craftpreview") { infostream<<"Ignoring IDropAction from " <<(da->from_inv.dump())<<":"<<da->from_list <<" because src is "<<da->from_list<<std::endl; delete a; return; } // Disallow dropping items if not allowed to interact if(!checkPriv(player->getName(), "interact")) { delete a; return; } stat.add("drop", player->getName()); } /* Handle restrictions and special cases of the craft action */ else if(a->getType() == IACTION_CRAFT) { ICraftAction *ca = (ICraftAction*)a; ca->craft_inv.applyCurrentPlayer(player->getName()); setInventoryModified(ca->craft_inv, false); //bool craft_inv_is_current_player = // (ca->craft_inv.type == InventoryLocation::PLAYER) && // (ca->craft_inv.name == player->getName()); // Disallow crafting if not allowed to interact if(!checkPriv(player->getName(), "interact")) { infostream<<"Cannot craft: " <<"No interact privilege"<<std::endl; delete a; return; } stat.add("craft", player->getName()); } // Do the action a->apply(this, playersao, this); // Eat the action delete a; SendInventory(playersao); } else if(command == TOSERVER_CHAT_MESSAGE) { std::string message = packet[TOSERVER_CHAT_MESSAGE_DATA].as<std::string>(); // If something goes wrong, this player is to blame RollbackScopeActor rollback_scope(m_rollback, std::string("player:")+player->getName()); // Get player name of this client std::string name = player->getName(); // Run script hook bool ate = m_script->on_chat_message(player->getName(), message); // If script ate the message, don't proceed if(ate) return; // Line to send to players std::string line; // Whether to send to other players bool send_to_others = false; // Commands are implemented in Lua, so only catch invalid // commands that were not "eaten" and send an error back if(message[0] == '/') { message = message.substr(1); if(message.length() == 0) line += "-!- Empty command"; else // TODO: str_split(message, ' ')[0] line += "-!- Invalid command: " + message; } else { if(checkPriv(player->getName(), "shout")){ line += "<"; line += name; line += "> "; line += message; send_to_others = true; } else line += "-!- You don't have permission to shout."; } if(!line.empty()) { if(send_to_others) { stat.add("chat", player->getName()); actionstream<<"CHAT: "<<line<<std::endl; SendChatMessage(PEER_ID_INEXISTENT, line); } else SendChatMessage(peer_id, line); } } else if(command == TOSERVER_DAMAGE) { u8 damage = packet[TOSERVER_DAMAGE_VALUE].as<u8>(); if(g_settings->getBool("enable_damage")) { actionstream<<player->getName()<<" damaged by " <<(int)damage<<" hp at "<<PP(player->getPosition()/BS) <<std::endl; playersao->setHP(playersao->getHP() - damage); SendPlayerHPOrDie(playersao->getPeerID(), playersao->getHP() == 0); stat.add("damage", player->getName(), damage); } } else if(command == TOSERVER_BREATH) { /* * If player is dead, we don't need to update the breath * He is dead ! */ if (!player->isDead()) { playersao->setBreath(packet[TOSERVER_BREATH_VALUE].as<u16>()); SendPlayerBreath(peer_id); } } else if(command == TOSERVER_CHANGE_PASSWORD) { std::string oldpwd, newpwd; packet[TOSERVER_CHANGE_PASSWORD_OLD].convert(&oldpwd); packet[TOSERVER_CHANGE_PASSWORD_NEW].convert(&newpwd); if(!base64_is_valid(newpwd)){ infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl; // Wrong old password supplied!! SendChatMessage(peer_id, "Invalid new password hash supplied. Password NOT changed."); return; } infostream<<"Server: Client requests a password change from " <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl; std::string playername = player->getName(); std::string checkpwd; m_script->getAuth(playername, &checkpwd, NULL); if(oldpwd != checkpwd) { infostream<<"Server: invalid old password"<<std::endl; // Wrong old password supplied!! SendChatMessage(peer_id, "Invalid old password supplied. Password NOT changed."); return; } bool success = m_script->setPassword(playername, newpwd); if(success){ actionstream<<player->getName()<<" changes password"<<std::endl; SendChatMessage(peer_id, "Password change successful."); } else { actionstream<<player->getName()<<" tries to change password but " <<"it fails"<<std::endl; SendChatMessage(peer_id, "Password change failed or inavailable."); } } else if(command == TOSERVER_PLAYERITEM) { u16 item = packet[TOSERVER_PLAYERITEM_VALUE].as<u16>(); playersao->setWieldIndex(item); } else if(command == TOSERVER_RESPAWN) { if(!player->isDead()) return; RespawnPlayer(peer_id); actionstream << player->getName() << " respawns at " << PP(player->getPosition()/BS) << std::endl; // ActiveObject is added to environment in AsyncRunStep after // the previous addition has been successfully removed } else if(command == TOSERVER_INTERACT) { u8 action; u16 item_i; PointedThing pointed; packet[TOSERVER_INTERACT_ACTION].convert(&action); packet[TOSERVER_INTERACT_ITEM].convert(&item_i); packet[TOSERVER_INTERACT_POINTED_THING].convert(&pointed); if(player->hp == 0) { verbosestream<<"TOSERVER_INTERACT: "<<player->getName() <<" tried to interact, but is dead!"<<std::endl; return; } v3f player_pos = playersao->getLastGoodPosition(); // Update wielded item playersao->setWieldIndex(item_i); // Get pointed to node (undefined if not POINTEDTYPE_NODE) v3s16 p_under = pointed.node_undersurface; v3s16 p_above = pointed.node_abovesurface; // Get pointed to object (NULL if not POINTEDTYPE_OBJECT) ServerActiveObject *pointed_object = NULL; if(pointed.type == POINTEDTHING_OBJECT) { pointed_object = m_env->getActiveObject(pointed.object_id); if(pointed_object == NULL) { verbosestream<<"TOSERVER_INTERACT: " "pointed object is NULL"<<std::endl; return; } } v3f pointed_pos_under = player_pos; v3f pointed_pos_above = player_pos; if(pointed.type == POINTEDTHING_NODE) { pointed_pos_under = intToFloat(p_under, BS); pointed_pos_above = intToFloat(p_above, BS); } else if(pointed.type == POINTEDTHING_OBJECT) { pointed_pos_under = pointed_object->getBasePosition(); pointed_pos_above = pointed_pos_under; } /* Check that target is reasonably close (only when digging or placing things) */ if(action == 0 || action == 2 || action == 3) { float d = player_pos.getDistanceFrom(pointed_pos_under); float max_d = BS * 14; // Just some large enough value if(d > max_d){ actionstream<<"Player "<<player->getName() <<" tried to access "<<pointed.dump() <<" from too far: " <<"d="<<d<<", max_d="<<max_d <<". ignoring."<<std::endl; // Re-send block to revert change on client-side RemoteClient *client = getClient(peer_id); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); // Call callbacks m_script->on_cheat(playersao, "interacted_too_far"); // Do nothing else return; } } /* Make sure the player is allowed to do it */ if(!checkPriv(player->getName(), "interact")) { actionstream<<player->getName()<<" attempted to interact with " <<pointed.dump()<<" without 'interact' privilege" <<std::endl; // Re-send block to revert change on client-side RemoteClient *client = getClient(peer_id); // Digging completed -> under if(action == 2){ v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); } // Placement -> above if(action == 3){ v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS)); client->SetBlockNotSent(blockpos); } stat.add("interact_denied", player->getName()); return; } /* If something goes wrong, this player is to blame */ RollbackScopeActor rollback_scope(m_rollback, std::string("player:")+player->getName()); /* 0: start digging or punch object */ if(action == 0) { if(pointed.type == POINTEDTHING_NODE) { /* NOTE: This can be used in the future to check if somebody is cheating, by checking the timing. */ MapNode n(CONTENT_IGNORE); bool pos_ok; n = m_env->getMap().getNodeNoEx(p_under, &pos_ok); if (pos_ok) n = m_env->getMap().getNodeNoEx(p_under, &pos_ok); if (!pos_ok) { infostream<<"Server: Not punching: Node not found." <<" Adding block to emerge queue." <<std::endl; m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above), false); } if(n.getContent() != CONTENT_IGNORE) m_script->node_on_punch(p_under, n, playersao, pointed); // Cheat prevention playersao->noCheatDigStart(p_under); } else if(pointed.type == POINTEDTHING_OBJECT) { // Skip if object has been removed if(pointed_object->m_removed) return; actionstream<<player->getName()<<" punches object " <<pointed.object_id<<": " <<pointed_object->getDescription()<<std::endl; ItemStack punchitem = playersao->getWieldedItem(); ToolCapabilities toolcap = punchitem.getToolCapabilities(m_itemdef); v3f dir = (pointed_object->getBasePosition() - (player->getPosition() + player->getEyeOffset()) ).normalize(); float time_from_last_punch = playersao->resetTimeFromLastPunch(); s16 src_original_hp = pointed_object->getHP(); s16 dst_origin_hp = playersao->getHP(); pointed_object->punch(dir, &toolcap, playersao, time_from_last_punch); // If the object is a player and its HP changed if (src_original_hp != pointed_object->getHP() && pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) { SendPlayerHPOrDie(((PlayerSAO*)pointed_object)->getPeerID(), pointed_object->getHP() == 0); } // If the puncher is a player and its HP changed if (dst_origin_hp != playersao->getHP()) { SendPlayerHPOrDie(playersao->getPeerID(), playersao->getHP() == 0); } stat.add("punch", player->getName()); } } // action == 0 /* 1: stop digging */ else if(action == 1) { } // action == 1 /* 2: Digging completed */ else if(action == 2) { // Only digging of nodes if(pointed.type == POINTEDTHING_NODE) { bool pos_ok; MapNode n = m_env->getMap().getNodeNoEx(p_under, &pos_ok); if (!pos_ok) { infostream << "Server: Not finishing digging: Node not found." << " Adding block to emerge queue." << std::endl; m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above), false); } /* Cheat prevention */ bool is_valid_dig = true; if(!isSingleplayer() && !g_settings->getBool("disable_anticheat")) { v3s16 nocheat_p = playersao->getNoCheatDigPos(); float nocheat_t = playersao->getNoCheatDigTime(); playersao->noCheatDigEnd(); // If player didn't start digging this, ignore dig if(nocheat_p != p_under){ infostream<<"Server: NoCheat: "<<player->getName() <<" started digging " <<PP(nocheat_p)<<" and completed digging " <<PP(p_under)<<"; not digging."<<std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "finished_unknown_dig"); } // Get player's wielded item ItemStack playeritem; InventoryList *mlist = playersao->getInventory()->getList("main"); if(mlist != NULL) playeritem = mlist->getItem(playersao->getWieldIndex()); ToolCapabilities playeritem_toolcap = playeritem.getToolCapabilities(m_itemdef); // Get diggability and expected digging time DigParams params = getDigParams(m_nodedef->get(n).groups, &playeritem_toolcap); // If can't dig, try hand if(!params.diggable){ const ItemDefinition &hand = m_itemdef->get(""); const ToolCapabilities *tp = hand.tool_capabilities; if(tp) params = getDigParams(m_nodedef->get(n).groups, tp); } // If can't dig, ignore dig if(!params.diggable){ infostream<<"Server: NoCheat: "<<player->getName() <<" completed digging "<<PP(p_under) <<", which is not diggable with tool. not digging." <<std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "dug_unbreakable"); } // Check digging time // If already invalidated, we don't have to if(!is_valid_dig){ // Well not our problem then } // Clean and long dig else if(params.time > 2.0 && nocheat_t * 1.2 > params.time){ // All is good, but grab time from pool; don't care if // it's actually available playersao->getDigPool().grab(params.time); } // Short or laggy dig // Try getting the time from pool else if(playersao->getDigPool().grab(params.time)){ // All is good } // Dig not possible else{ infostream<<"Server: NoCheat: "<<player->getName() <<" completed digging "<<PP(p_under) <<"too fast; not digging."<<std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "dug_too_fast"); } } /* Actually dig node */ if(is_valid_dig && n.getContent() != CONTENT_IGNORE) { m_script->node_on_dig(p_under, n, playersao); stat.add("dig", player->getName()); stat.add("dig_"+ m_nodedef->get(n).name , player->getName()); } v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); RemoteClient *client = getClient(peer_id); // Send unusual result (that is, node not being removed) if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR) { // Re-send block to revert change on client-side client->SetBlockNotSent(blockpos); } else { client->ResendBlockIfOnWire(blockpos); } } } // action == 2 /* 3: place block or right-click object */ else if(action == 3) { ItemStack item = playersao->getWieldedItem(); // Reset build time counter if(pointed.type == POINTEDTHING_NODE && item.getDefinition(m_itemdef).type == ITEM_NODE) getClient(peer_id)->m_time_from_building = 0.0; if(pointed.type == POINTEDTHING_OBJECT) { // Right click object // Skip if object has been removed if(pointed_object->m_removed) return; /* android bug - too many actionstream<<player->getName()<<" right-clicks object " <<pointed.object_id<<": " <<pointed_object->getDescription()<<std::endl; */ // Do stuff pointed_object->rightClick(playersao); } else if(m_script->item_OnPlace( item, playersao, pointed)) { // Placement was handled in lua // Apply returned ItemStack if (playersao->setWieldedItem(item)) { SendInventory(playersao); } stat.add("place", player->getName()); //stat.add("place_" + item.name, player->getName()); } // If item has node placement prediction, always send the // blocks to make sure the client knows what exactly happened RemoteClient *client = getClient(peer_id); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS)); v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); if(item.getDefinition(m_itemdef).node_placement_prediction != "") { client->SetBlockNotSent(blockpos); if(blockpos2 != blockpos) { client->SetBlockNotSent(blockpos2); } } else { client->ResendBlockIfOnWire(blockpos); if(blockpos2 != blockpos) { client->ResendBlockIfOnWire(blockpos2); } } } // action == 3 /* 4: use */ else if(action == 4) { ItemStack item = playersao->getWieldedItem(); actionstream<<player->getName()<<" uses "<<item.name <<", pointing at "<<pointed.dump()<<std::endl; if(m_script->item_OnUse( item, playersao, pointed)) { // Apply returned ItemStack if (playersao->setWieldedItem(item)) { SendInventory(playersao); } stat.add("use", player->getName()); stat.add("use_" + item.name, player->getName()); } } // action == 4 /* Catch invalid actions */ else { infostream<<"WARNING: Server: Invalid action " <<action<<std::endl; } } else if(command == TOSERVER_REMOVED_SOUNDS) { std::vector<s32> removed_ids; packet[TOSERVER_REMOVED_SOUNDS_IDS].convert(&removed_ids); for (auto id : removed_ids) { std::map<s32, ServerPlayingSound>::iterator i = m_playing_sounds.find(id); if(i == m_playing_sounds.end()) continue; ServerPlayingSound &psound = i->second; psound.clients.erase(peer_id); if(psound.clients.empty()) m_playing_sounds.erase(i); } } else if(command == TOSERVER_NODEMETA_FIELDS) { v3s16 p = packet[TOSERVER_NODEMETA_FIELDS_POS].as<v3s16>(); std::string formname = packet[TOSERVER_NODEMETA_FIELDS_FORMNAME].as<std::string>(); std::map<std::string, std::string> fields; packet[TOSERVER_NODEMETA_FIELDS_DATA].convert(&fields); // If something goes wrong, this player is to blame RollbackScopeActor rollback_scope(m_rollback, std::string("player:")+player->getName()); // Check the target node for rollback data; leave others unnoticed RollbackNode rn_old(&m_env->getMap(), p, this); m_script->node_on_receive_fields(p, formname, fields,playersao); // Report rollback data RollbackNode rn_new(&m_env->getMap(), p, this); if(rollback() && rn_new != rn_old){ RollbackAction action; action.setSetNode(p, rn_old, rn_new); rollback()->reportAction(action); } } else if(command == TOSERVER_INVENTORY_FIELDS) { std::string formname; std::map<std::string, std::string> fields; packet[TOSERVER_INVENTORY_FIELDS_FORMNAME].convert(&formname); packet[TOSERVER_INVENTORY_FIELDS_DATA].convert(&fields); m_script->on_playerReceiveFields(playersao, formname, fields); } else if(command == TOSERVER_DRAWCONTROL) { auto client = getClient(peer_id); client->wanted_range = packet[TOSERVER_DRAWCONTROL_WANTED_RANGE].as<u32>(); client->range_all = packet[TOSERVER_DRAWCONTROL_RANGE_ALL].as<u32>(); client->farmesh = packet[TOSERVER_DRAWCONTROL_FARMESH].as<u8>(); client->fov = packet[TOSERVER_DRAWCONTROL_FOV].as<f32>(); client->block_overflow = packet[TOSERVER_DRAWCONTROL_BLOCK_OVERFLOW].as<bool>(); } else { infostream<<"Server::ProcessData(): Ignoring " "unknown command "<<command<<std::endl; } } //try catch(SendFailedException &e) { errorstream<<"Server::ProcessData(): SendFailedException: " <<"what="<<e.what() <<std::endl; } }
void Server::handleCommand_Interact(NetworkPacket* pkt) { const auto peer_id = pkt->getPeerId(); auto & packet = *(pkt->packet); auto player = m_env->getPlayer(pkt->getPeerId()); if (!player) { m_con.DisconnectPeer(pkt->getPeerId()); return; } auto playersao = player->getPlayerSAO(); if (!playersao) { m_con.DisconnectPeer(pkt->getPeerId()); return; } u8 action; u16 item_i; PointedThing pointed; packet[TOSERVER_INTERACT_ACTION].convert(action); packet[TOSERVER_INTERACT_ITEM].convert(item_i); packet[TOSERVER_INTERACT_POINTED_THING].convert(pointed); if(player->hp == 0) { verbosestream << "TOSERVER_INTERACT: " << player->getName() << " tried to interact, but is dead!" << std::endl; return; } MAP_NOTHREAD_LOCK((&m_env->getMap())); v3f player_pos = playersao->getLastGoodPosition(); // Update wielded item playersao->setWieldIndex(item_i); // Get pointed to node (undefined if not POINTEDTYPE_NODE) v3s16 p_under = pointed.node_undersurface; v3s16 p_above = pointed.node_abovesurface; // Get pointed to object (NULL if not POINTEDTYPE_OBJECT) ServerActiveObject *pointed_object = NULL; if(pointed.type == POINTEDTHING_OBJECT) { pointed_object = m_env->getActiveObject(pointed.object_id); if(pointed_object == NULL) { verbosestream << "TOSERVER_INTERACT: " "pointed object is NULL" << std::endl; return; } } v3f pointed_pos_under = player_pos; v3f pointed_pos_above = player_pos; if(pointed.type == POINTEDTHING_NODE) { pointed_pos_under = intToFloat(p_under, BS); pointed_pos_above = intToFloat(p_above, BS); } else if(pointed.type == POINTEDTHING_OBJECT) { pointed_pos_under = pointed_object->getBasePosition(); pointed_pos_above = pointed_pos_under; } /* Check that target is reasonably close (only when digging or placing things) */ static const bool enable_anticheat = !g_settings->getBool("disable_anticheat"); if ((action == 0 || action == 2 || action == 3) && (enable_anticheat && !isSingleplayer())) { float d = player_pos.getDistanceFrom(pointed_pos_under); float max_d = BS * 14; // Just some large enough value if(d > max_d) { actionstream << "Player " << player->getName() << " tried to access " << pointed.dump() << " from too far: " << "d=" << d << ", max_d=" << max_d << ". ignoring." << std::endl; // Re-send block to revert change on client-side RemoteClient *client = getClient(peer_id); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); // Call callbacks m_script->on_cheat(playersao, "interacted_too_far"); // Do nothing else return; } } /* Make sure the player is allowed to do it */ if(!checkPriv(player->getName(), "interact")) { actionstream << player->getName() << " attempted to interact with " << pointed.dump() << " without 'interact' privilege" << std::endl; // Re-send block to revert change on client-side RemoteClient *client = getClient(peer_id); // Digging completed -> under if(action == 2) { v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); } // Placement -> above if(action == 3) { v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS)); client->SetBlockNotSent(blockpos); } stat.add("interact_denied", player->getName()); return; } /* If something goes wrong, this player is to blame */ RollbackScopeActor rollback_scope(m_rollback, std::string("player:") + player->getName()); /* 0: start digging or punch object */ if(action == 0) { if(pointed.type == POINTEDTHING_NODE) { /* NOTE: This can be used in the future to check if somebody is cheating, by checking the timing. */ MapNode n = m_env->getMap().getNode(p_under); if (!n) { infostream << "Server: Not punching: Node not found." << " Adding block to emerge queue." << std::endl; m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above), false); } if(n.getContent() != CONTENT_IGNORE) m_script->node_on_punch(p_under, n, playersao, pointed); // Cheat prevention playersao->noCheatDigStart(p_under); } else if(pointed.type == POINTEDTHING_OBJECT) { // Skip if object has been removed if(pointed_object->m_removed) return; actionstream << player->getName() << " punches object " << pointed.object_id << ": " << pointed_object->getDescription() << std::endl; ItemStack punchitem = playersao->getWieldedItem(); ToolCapabilities toolcap = punchitem.getToolCapabilities(m_itemdef); v3f dir = (pointed_object->getBasePosition() - (player->getPosition() + player->getEyeOffset()) ).normalize(); float time_from_last_punch = playersao->resetTimeFromLastPunch(); s16 src_original_hp = pointed_object->getHP(); s16 dst_origin_hp = playersao->getHP(); pointed_object->punch(dir, &toolcap, playersao, time_from_last_punch); // If the object is a player and its HP changed if (src_original_hp != pointed_object->getHP() && pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) { SendPlayerHPOrDie(((PlayerSAO*)pointed_object)); } // If the puncher is a player and its HP changed if (dst_origin_hp != playersao->getHP()) { SendPlayerHPOrDie(playersao); } stat.add("punch", player->getName()); } } // action == 0 /* 1: stop digging */ else if(action == 1) { } // action == 1 /* 2: Digging completed */ else if(action == 2) { // Only digging of nodes if(pointed.type == POINTEDTHING_NODE) { MapNode n = m_env->getMap().getNode(p_under); if (!n) { infostream << "Server: Not finishing digging: Node not found." << " Adding block to emerge queue." << std::endl; m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above), false); } /* Cheat prevention */ bool is_valid_dig = true; if (enable_anticheat && !isSingleplayer()) { v3s16 nocheat_p = playersao->getNoCheatDigPos(); float nocheat_t = playersao->getNoCheatDigTime(); playersao->noCheatDigEnd(); // If player didn't start digging this, ignore dig if(nocheat_p != p_under) { infostream << "Server: NoCheat: " << player->getName() << " started digging " << PP(nocheat_p) << " and completed digging " << PP(p_under) << "; not digging." << std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "finished_unknown_dig"); } // Get player's wielded item ItemStack playeritem; InventoryList *mlist = playersao->getInventory()->getList("main"); if(mlist != NULL) playeritem = mlist->getItem(playersao->getWieldIndex()); ToolCapabilities playeritem_toolcap = playeritem.getToolCapabilities(m_itemdef); // Get diggability and expected digging time DigParams params = getDigParams(m_nodedef->get(n).groups, &playeritem_toolcap); // If can't dig, try hand if(!params.diggable) { const ItemDefinition &hand = m_itemdef->get(""); const ToolCapabilities *tp = hand.tool_capabilities; if(tp) params = getDigParams(m_nodedef->get(n).groups, tp); } // If can't dig, ignore dig if(!params.diggable) { infostream << "Server: NoCheat: " << player->getName() << " completed digging " << PP(p_under) << ", which is not diggable with tool. not digging." << std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "dug_unbreakable"); } // Check digging time // If already invalidated, we don't have to if(!is_valid_dig) { // Well not our problem then } // Clean and long dig else if(params.time > 2.0 && nocheat_t * 1.2 > params.time) { // All is good, but grab time from pool; don't care if // it's actually available playersao->getDigPool().grab(params.time); } // Short or laggy dig // Try getting the time from pool else if(playersao->getDigPool().grab(params.time)) { // All is good } // Dig not possible else { infostream << "Server: NoCheat: " << player->getName() << " completed digging " << PP(p_under) << "too fast; not digging." << std::endl; is_valid_dig = false; // Call callbacks m_script->on_cheat(playersao, "dug_too_fast"); } } /* Actually dig node */ if(is_valid_dig && n.getContent() != CONTENT_IGNORE) { m_script->node_on_dig(p_under, n, playersao); stat.add("dig", player->getName()); stat.add("dig_" + m_nodedef->get(n).name , player->getName()); } v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); RemoteClient *client = getClient(peer_id); // Send unusual result (that is, node not being removed) if(m_env->getMap().getNode(p_under).getContent() != CONTENT_AIR) { // Re-send block to revert change on client-side client->SetBlockNotSent(blockpos); } else { client->ResendBlockIfOnWire(blockpos); } m_env->nodeUpdate(p_under, 5, 0); } } // action == 2 /* 3: place block or right-click object */ else if(action == 3) { ItemStack item = playersao->getWieldedItem(); // Reset build time counter if(pointed.type == POINTEDTHING_NODE && item.getDefinition(m_itemdef).type == ITEM_NODE) getClient(peer_id)->m_time_from_building = 0.0; if(pointed.type == POINTEDTHING_OBJECT) { // Right click object // Skip if object has been removed if(pointed_object->m_removed) return; /* android bug - too many actionstream<<player->getName()<<" right-clicks object " <<pointed.object_id<<": " <<pointed_object->getDescription()<<std::endl; */ // Do stuff pointed_object->rightClick(playersao); } else if(m_script->item_OnPlace( item, playersao, pointed)) { // Placement was handled in lua // Apply returned ItemStack if (playersao->setWieldedItem(item)) { SendInventory(playersao); } stat.add("place", player->getName()); //stat.add("place_" + item.name, player->getName()); } // If item has node placement prediction, always send the // blocks to make sure the client knows what exactly happened RemoteClient *client = getClient(peer_id); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS)); v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); if(item.getDefinition(m_itemdef).node_placement_prediction != "") { client->SetBlockNotSent(blockpos); if(blockpos2 != blockpos) { client->SetBlockNotSent(blockpos2); } } else { client->ResendBlockIfOnWire(blockpos); if(blockpos2 != blockpos) { client->ResendBlockIfOnWire(blockpos2); } } m_env->nodeUpdate(p_under, 5, 0); } // action == 3 /* 4: use */ else if(action == 4) { ItemStack item = playersao->getWieldedItem(); actionstream << player->getName() << " uses " << item.name << ", pointing at " << pointed.dump() << std::endl; if(m_script->item_OnUse( item, playersao, pointed)) { // Apply returned ItemStack if (playersao->setWieldedItem(item)) { SendInventory(playersao); } stat.add("use", player->getName()); stat.add("use_" + item.name, player->getName()); m_env->nodeUpdate(p_under, 5, 0); } } // action == 4 /* 5: rightclick air */ else if (action == 5) { ItemStack item = playersao->getWieldedItem(); actionstream << player->getName() << " activates " << item.name << std::endl; if (m_script->item_OnSecondaryUse( item, playersao)) { if( playersao->setWieldedItem(item)) { SendInventory(playersao); } } } /* Catch invalid actions */ else { infostream << "WARNING: Server: Invalid action " << action << std::endl; } }