コード例 #1
0
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;
	}
}
コード例 #2
0
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;
	}

}