advtrains.git - Advtrains mod for minetest.

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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <iostream>
#include <algorithm>
#include <sstream>
#include <IFileSystem.h>
#include "jthread/jmutexautolock.h"
#include "util/directiontables.h"
#include "util/pointedthing.h"
#include "util/serialize.h"
#include "util/string.h"
#include "strfnd.h"
#include "client.h"
#include "clientserver.h"
#include "main.h"
#include "filesys.h"
#include "porting.h"
#include "mapsector.h"
#include "mapblock_mesh.h"
#include "mapblock.h"
#include "settings.h"
#include "profiler.h"
#include "gettext.h"
#include "log.h"
#include "nodemetadata.h"
#include "nodedef.h"
#include "itemdef.h"
#include "shader.h"
#include "base64.h"
#include "clientmap.h"
#include "clientmedia.h"
#include "sound.h"
#include "IMeshCache.h"
#include "serialization.h"
#include "config.h"
#include "version.h"
#include "drawscene.h"
#include "subgame.h"
#include "server.h"
#include "database.h"
#include "database-sqlite3.h"

extern gui::IGUIEnvironment* guienv;

/*
	QueuedMeshUpdate
*/

QueuedMeshUpdate::QueuedMeshUpdate():
	p(-1337,-1337,-1337),
	data(NULL),
	ack_block_to_server(false)
{
}

QueuedMeshUpdate::~QueuedMeshUpdate()
{
	if(data)
		delete data;
}

/*
	MeshUpdateQueue
*/

MeshUpdateQueue::MeshUpdateQueue()
{
}

MeshUpdateQueue::~MeshUpdateQueue()
{
	JMutexAutoLock lock(m_mutex);

	for(std::vector<QueuedMeshUpdate*>::iterator
			i = m_queue.begin();
			i != m_queue.end(); i++)
	{
		QueuedMeshUpdate *q = *i;
		delete q;
	}
}

/*
	peer_id=0 adds with nobody to send to
*/
void MeshUpdateQueue::addBlock(v3s16 p, MeshMakeData *data, bool ack_block_to_server, bool urgent)
{
	DSTACK(__FUNCTION_NAME);

	assert(data);

	JMutexAutoLock lock(m_mutex);

	if(urgent)
		m_urgents.insert(p);

	/*
		Find if block is already in queue.
		If it is, update the data and quit.
	*/
	for(std::vector<QueuedMeshUpdate*>::iterator
			i = m_queue.begin();
			i != m_queue.end(); i++)
	{
		QueuedMeshUpdate *q = *i;
		if(q->p == p)
		{
			if(q->data)
				delete q->data;
			q->data = data;
			if(ack_block_to_server)
				q->ack_block_to_server = true;
			return;
		}
	}

	/*
		Add the block
	*/
	QueuedMeshUpdate *q = new QueuedMeshUpdate;
	q->p = p;
	q->data = data;
	q->ack_block_to_server = ack_block_to_server;
	m_queue.push_back(q);
}

// Returned pointer must be deleted
// Returns NULL if queue is empty
QueuedMeshUpdate * MeshUpdateQueue::pop()
{
	JMutexAutoLock lock(m_mutex);

	bool must_be_urgent = !m_urgents.empty();
	for(std::vector<QueuedMeshUpdate*>::iterator
			i = m_queue.begin();
			i != m_queue.end(); i++)
	{
		QueuedMeshUpdate *q = *i;
		if(must_be_urgent && m_urgents.count(q->p) == 0)
			continue;
		m_queue.erase(i);
		m_urgents.erase(q->p);
		return q;
	}
	return NULL;
}

/*
	MeshUpdateThread
*/

void * MeshUpdateThread::Thread()
{
	ThreadStarted();

	log_register_thread("MeshUpdateThread");

	DSTACK(__FUNCTION_NAME);

	BEGIN_DEBUG_EXCEPTION_HANDLER

	porting::setThreadName("MeshUpdateThread");

	while(!StopRequested())
	{
		QueuedMeshUpdate *q = m_queue_in.pop();
		if(q == NULL)
		{
			sleep_ms(3);
			continue;
		}

		ScopeProfiler sp(g_profiler, "Client: Mesh making");

		MapBlockMesh *mesh_new = new MapBlockMesh(q->data, m_camera_offset);
		if(mesh_new->getMesh()->getMeshBufferCount() == 0)
		{
			delete mesh_new;
			mesh_new = NULL;
		}

		MeshUpdateResult r;
		r.p = q->p;
		r.mesh = mesh_new;
		r.ack_block_to_server = q->ack_block_to_server;

		m_queue_out.push_back(r);

		delete q;
	}

	END_DEBUG_EXCEPTION_HANDLER(errorstream)

	return NULL;
}

/*
	Client
*/

Client::Client(
		IrrlichtDevice *device,
		const char *playername,
		std::string password,
		bool is_simple_singleplayer_game,
		MapDrawControl &control,
		IWritableTextureSource *tsrc,
		IWritableShaderSource *shsrc,
		IWritableItemDefManager *itemdef,
		IWritableNodeDefManager *nodedef,
		ISoundManager *sound,
		MtEventManager *event,
		bool ipv6
):
	m_packetcounter_timer(0.0),
	m_connection_reinit_timer(0.1),
	m_avg_rtt_timer(0.0),
	m_playerpos_send_timer(0.0),
	m_ignore_damage_timer(0.0),
	m_tsrc(tsrc),
	m_shsrc(shsrc),
	m_itemdef(itemdef),
	m_nodedef(nodedef),
	m_sound(sound),
	m_event(event),
	m_mesh_update_thread(this),
	m_env(
		new ClientMap(this, this, control,
			device->getSceneManager()->getRootSceneNode(),
			device->getSceneManager(), 666),
		device->getSceneManager(),
		tsrc, this, device
	),
	m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, ipv6, this),
	m_device(device),
	m_server_ser_ver(SER_FMT_VER_INVALID),
	m_playeritem(0),
	m_inventory_updated(false),
	m_inventory_from_server(NULL),
	m_inventory_from_server_age(0.0),
	m_show_highlighted(false),
	m_animation_time(0),
	m_crack_level(-1),
	m_crack_pos(0,0,0),
	m_highlighted_pos(0,0,0),
	m_map_seed(0),
	m_password(password),
	m_access_denied(false),
	m_itemdef_received(false),
	m_nodedef_received(false),
	m_media_downloader(new ClientMediaDownloader()),
	m_time_of_day_set(false),
	m_last_time_of_day_f(-1),
	m_time_of_day_update_timer(0),
	m_recommended_send_interval(0.1),
	m_removed_sounds_check_timer(0),
	m_state(LC_Created)
{
	/*
		Add local player
	*/
	{
		Player *player = new LocalPlayer(this, playername);

		m_env.addPlayer(player);
	}

	if (g_settings->getBool("enable_local_map_saving")
			&& !is_simple_singleplayer_game) {
		const std::string world_path = porting::path_user + DIR_DELIM + "worlds"
				+ DIR_DELIM + "server_" + g_settings->get("address")
				+ "_" + g_settings->get("remote_port");

		SubgameSpec gamespec;
		if (!getWorldExists(world_path)) {
			gamespec = findSubgame(g_settings->get("default_game"));
			if (!gamespec.isValid())
				gamespec = findSubgame("minimal");
		} else {
			std::string world_gameid = getWorldGameId(world_path, false);
			gamespec = findWorldSubgame(world_path);
		}
		if (!gamespec.isValid()) {
			errorstream << "Couldn't find subgame for local map saving." << std::endl;
			return;
		}

		localserver = new Server(world_path, gamespec, false, false);
		localdb = new Database_SQLite3(&(ServerMap&)localserver->getMap(), world_path);
		localdb->beginSave();
		actionstream << "Local map saving started, map will be saved at '" << world_path << "'" << std::endl;
	} else {
		localdb = NULL;
	}

	m_cache_smooth_lighting = g_settings->getBool("smooth_lighting");
}

void Client::Stop()
{
	//request all client managed threads to stop
	m_mesh_update_thread.Stop();
	if (localdb != NULL) {
		actionstream << "Local map saving ended" << std::endl;
		localdb->endSave();
	}
}

bool Client::isShutdown()
{

	if (!m_mesh_update_thread.IsRunning()) return true;

	return false;
}

Client::~Client()
{
	m_con.Disconnect();

	m_mesh_update_thread.Stop();
	m_mesh_update_thread.Wait();
	while(!m_mesh_update_thread.m_queue_out.empty()) {
		MeshUpdateResult r = m_mesh_update_thread.m_queue_out.pop_frontNoEx();
		delete r.mesh;
	}


	delete m_inventory_from_server;

	// Delete detached inventories
	for(std::map<std::string, Inventory*>::iterator
			i = m_detached_inventories.begin();
			i != m_detached_inventories.end(); i++){
		delete i->second;
	}

	// cleanup 3d model meshes on client shutdown
	while (m_device->getSceneManager()->getMeshCache()->getMeshCount() != 0) {
		scene::IAnimatedMesh * mesh =
			m_device->getSceneManager()->getMeshCache()->getMeshByIndex(0);

		if (mesh != NULL)
			m_device->getSceneManager()->getMeshCache()->removeMesh(mesh);
	}
}

void Client::connect(Address address)
{
	DSTACK(__FUNCTION_NAME);
	m_con.SetTimeoutMs(0);
	m_con.Connect(address);
}

void Client::step(float dtime)
{
	DSTACK(__FUNCTION_NAME);

	// Limit a bit
	if(dtime > 2.0)
		dtime = 2.0;

	if(m_ignore_damage_timer > dtime)
		m_ignore_damage_timer -= dtime;
	else
		m_ignore_damage_timer = 0.0;

	m_animation_time += dtime;
	if(m_animation_time > 60.0)
		m_animation_time -= 60.0;

	m_time_of_day_update_timer += dtime;

	ReceiveAll();

	/*
		Packet counter
	*/
	{
		float &counter = m_packetcounter_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			counter = 20.0;

			infostream << "Client packetcounter (" << m_packetcounter_timer
					<< "):"<<std::endl;
			m_packetcounter.print(infostream);
			m_packetcounter.clear();
		}
	}

#if 0
	{
		/*
			Delete unused sectors

			NOTE: This jams the game for a while because deleting sectors
			      clear caches
		*/

		float &counter = m_delete_unused_sectors_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			// 3 minute interval
			//counter = 180.0;
			counter = 60.0;

			//JMutexAutoLock lock(m_env_mutex); //bulk comment-out

			core::list<v3s16> deleted_blocks;

			float delete_unused_sectors_timeout =
				g_settings->getFloat("client_delete_unused_sectors_timeout");

			// Delete sector blocks
			/*u32 num = m_env.getMap().unloadUnusedData
					(delete_unused_sectors_timeout,
					true, &deleted_blocks);*/

			// Delete whole sectors
			m_env.getMap().unloadUnusedData
					(delete_unused_sectors_timeout,
					&deleted_blocks);

			if(deleted_blocks.size() > 0)
			{
				/*infostream<<"Client: Deleted blocks of "<<num
						<<" unused sectors"<<std::endl;*/
				/*infostream<<"Client: Deleted "<<num
						<<" unused sectors"<<std::endl;*/

				/*
					Send info to server
				*/

				// Env is locked so con can be locked.
				//JMutexAutoLock lock(m_con_mutex); //bulk comment-out

				core::list<v3s16>::Iterator i = deleted_blocks.begin();
				core::list<v3s16> sendlist;
				for(;;)
				{
					if(sendlist.size() == 255 || i == deleted_blocks.end())
					{
						if(sendlist.size() == 0)
							break;
						/*
							[0] u16 command
							[2] u8 count
							[3] v3s16 pos_0
							[3+6] v3s16 pos_1
							...
						*/
						u32 replysize = 2+1+6*sendlist.size();
						SharedBuffer<u8> reply(replysize);
						writeU16(&reply[0], TOSERVER_DELETEDBLOCKS);
						reply[2] = sendlist.size();
						u32 k = 0;
						for(core::list<v3s16>::Iterator
								j = sendlist.begin();
								j != sendlist.end(); j++)
						{
							writeV3S16(&reply[2+1+6*k], *j);
							k++;
						}
						m_con.Send(PEER_ID_SERVER, 1, reply, true);

						if(i == deleted_blocks.end())
							break;

						sendlist.clear();
					}

					sendlist.push_back(*i);
					i++;
				}
			}
		}
	}
#endif
	// UGLY hack to fix 2 second startup delay caused by non existent
	// server client startup synchronization in local server or singleplayer mode
	static bool initial_step = true;
	if (initial_step) {
		initial_step = false;
	}
	else if(m_state == LC_Created)
	{
		float &counter = m_connection_reinit_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			counter = 2.0;

			//JMutexAutoLock envlock(m_env_mutex); //bulk comment-out

			Player *myplayer = m_env.getLocalPlayer();
			assert(myplayer != NULL);
			// Send TOSERVER_INIT
			// [0] u16 TOSERVER_INIT
			// [2] u8 SER_FMT_VER_HIGHEST_READ
			// [3] u8[20] player_name
			// [23] u8[28] password (new in some version)
			// [51] u16 minimum supported network protocol version (added sometime)
			// [53] u16 maximum supported network protocol version (added later than the previous one)
			SharedBuffer<u8> data(2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2);
			writeU16(&data[0], TOSERVER_INIT);
			writeU8(&data[2], SER_FMT_VER_HIGHEST_READ);

			memset((char*)&data[3], 0, PLAYERNAME_SIZE);
			snprintf((char*)&data[3], PLAYERNAME_SIZE, "%s", myplayer->getName());

			/*infostream<<"Client: sending initial password hash: \""<<m_password<<"\""
					<<std::endl;*/

			memset((char*)&data[23], 0, PASSWORD_SIZE);
			snprintf((char*)&data[23], PASSWORD_SIZE, "%s", m_password.c_str());

			writeU16(&data[51], CLIENT_PROTOCOL_VERSION_MIN);
			writeU16(&data[53], CLIENT_PROTOCOL_VERSION_MAX);

			// Send as unreliable
			Send(1, data, false);
		}

		// Not connected, return
		return;
	}

	/*
		Do stuff if connected
	*/

	/*
		Run Map's timers and unload unused data
	*/
	const float map_timer_and_unload_dtime = 5.25;
	if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
	{
		ScopeProfiler sp(g_profiler, "Client: map timer and unload");
		std::list<v3s16> deleted_blocks;
		m_env.getMap().timerUpdate(map_timer_and_unload_dtime,
				g_settings->getFloat("client_unload_unused_data_timeout"),
				&deleted_blocks);

		/*if(deleted_blocks.size() > 0)
			infostream<<"Client: Unloaded "<<deleted_blocks.size()
					<<" unused blocks"<<std::endl;*/

		/*
			Send info to server
			NOTE: This loop is intentionally iterated the way it is.
		*/

		std::list<v3s16>::iterator i = deleted_blocks.begin();
		std::list<v3s16> sendlist;
		for(;;)
		{
			if(sendlist.size() == 255 || i == deleted_blocks.end())
			{
				if(sendlist.empty())
					break;
				/*
					[0] u16 command
					[2] u8 count
					[3] v3s16 pos_0
					[3+6] v3s16 pos_1
					...
				*/
				u32 replysize = 2+1+6*sendlist.size();
				SharedBuffer<u8> reply(replysize);
				writeU16(&reply[0], TOSERVER_DELETEDBLOCKS);
				reply[2] = sendlist.size();
				u32 k = 0;
				for(std::list<v3s16>::iterator
						j = sendlist.begin();
						j != sendlist.end(); ++j)
				{
					writeV3S16(&reply[2+1+6*k], *j);
					k++;
				}
				m_con.Send(PEER_ID_SERVER, 2, reply, true);

				if(i == deleted_blocks.end())
					break;

				sendlist.clear();
			}

			sendlist.push_back(*i);
			++i;
		}
	}

	/*
		Handle environment
	*/
	{
		// Control local player (0ms)
		LocalPlayer *player = m_env.getLocalPlayer();
		assert(player != NULL);
		player->applyControl(dtime);

		// Step environment
		m_env.step(dtime);

		/*
			Get events
		*/
		for(;;)
		{
			ClientEnvEvent event = m_env.getClientEvent();
			if(event.type == CEE_NONE)
			{
				break;
			}
			else if(event.type == CEE_PLAYER_DAMAGE)
			{
				if(m_ignore_damage_timer <= 0)
				{
					u8 damage = event.player_damage.amount;

					if(event.player_damage.send_to_server)
						sendDamage(damage);

					// Add to ClientEvent queue
					ClientEvent event;
					event.type = CE_PLAYER_DAMAGE;
					event.player_damage.amount = damage;
					m_client_event_queue.push_back(event);
				}
			}
			else if(event.type == CEE_PLAYER_BREATH)
			{
					u16 breath = event.player_breath.amount;
					sendBreath(breath);
			}
		}
	}

	/*
		Print some info
	*/
	{
		float &counter = m_avg_rtt_timer;
		counter += dtime;
		if(counter >= 10)
		{
			counter = 0.0;
			// connectedAndInitialized() is true, peer exists.
			float avg_rtt = getRTT();
			infostream<<"Client: avg_rtt="<<avg_rtt<<std::endl;
		}
	}

	/*
		Send player position to server
	*/
	{
		float &counter = m_playerpos_send_timer;
		counter += dtime;
		if((m_state == LC_Ready) && (counter >= m_recommended_send_interval))
		{
			counter = 0.0;
			sendPlayerPos();
		}
	}

	/*
		Replace updated meshes
	*/
	{
		int num_processed_meshes = 0;
		while(!m_mesh_update_thread.m_queue_out.empty())
		{
			num_processed_meshes++;
			MeshUpdateResult r = m_mesh_update_thread.m_queue_out.pop_frontNoEx();
			MapBlock *block = m_env.getMap().getBlockNoCreateNoEx(r.p);
			if(block)
			{
				// Delete the old mesh
				if(block->mesh != NULL)
				{
					// TODO: Remove hardware buffers of meshbuffers of block->mesh
					delete block->mesh;
					block->mesh = NULL;
				}

				// Replace with the new mesh
				block->mesh = r.mesh;
			} else {
				delete r.mesh;
			}
			if(r.ack_block_to_server)
			{
				/*
					Acknowledge block
				*/
				/*
					[0] u16 command
					[2] u8 count
					[3] v3s16 pos_0
					[3+6] v3s16 pos_1
					...
				*/
				u32 replysize = 2+1+6;
				SharedBuffer<u8> reply(replysize);
				writeU16(&reply[0], TOSERVER_GOTBLOCKS);
				reply[2] = 1;
				writeV3S16(&reply[3], r.p);
				// Send as reliable
				m_con.Send(PEER_ID_SERVER, 2, reply, true);
			}
		}
		if(num_processed_meshes > 0)
			g_profiler->graphAdd("num_processed_meshes", num_processed_meshes);
	}

	/*
		Load fetched media
	*/
	if (m_media_downloader && m_media_downloader->isStarted()) {
		m_media_downloader->step(this);
		if (m_media_downloader->isDone()) {
			received_media();
			delete m_media_downloader;
			m_media_downloader = NULL;
		}
	}

	/*
		If the server didn't update the inventory in a while, revert
		the local inventory (so the player notices the lag problem
		and knows something is wrong).
	*/
	if(m_inventory_from_server)
	{
		float interval = 10.0;
		float count_before = floor(m_inventory_from_server_age / interval);

		m_inventory_from_server_age += dtime;

		float count_after = floor(m_inventory_from_server_age / interval);

		if(count_after != count_before)
		{
			// Do this every <interval> seconds after TOCLIENT_INVENTORY
			// Reset the locally changed inventory to the authoritative inventory
			Player *player = m_env.getLocalPlayer();
			player->inventory = *m_inventory_from_server;
			m_inventory_updated = true;
		}
	}

	/*
		Update positions of sounds attached to objects
	*/
	{
		for(std::map<int, u16>::iterator
				i = m_sounds_to_objects.begin();
				i != m_sounds_to_objects.end(); i++)
		{
			int client_id = i->first;
			u16 object_id = i->second;
			ClientActiveObject *cao = m_env.getActiveObject(object_id);
			if(!cao)
				continue;
			v3f pos = cao->getPosition();
			m_sound->updateSoundPosition(client_id, pos);
		}
	}

	/*
		Handle removed remotely initiated sounds
	*/
	m_removed_sounds_check_timer += dtime;
	if(m_removed_sounds_check_timer >= 2.32)
	{
		m_removed_sounds_check_timer = 0;
		// Find removed sounds and clear references to them
		std::set<s32> removed_server_ids;
		for(std::map<s32, int>::iterator
				i = m_sounds_server_to_client.begin();
				i != m_sounds_server_to_client.end();)
		{
			s32 server_id = i->first;
			int client_id = i->second;
			i++;
			if(!m_sound->soundExists(client_id)){
				m_sounds_server_to_client.erase(server_id);
				m_sounds_client_to_server.erase(client_id);
				m_sounds_to_objects.erase(client_id);
				removed_server_ids.insert(server_id);
			}
		}
		// Sync to server
		if(!removed_server_ids.empty())
		{
			std::ostringstream os(std::ios_base::binary);
			writeU16(os, TOSERVER_REMOVED_SOUNDS);
			size_t server_ids = removed_server_ids.size();
			assert(server_ids <= 0xFFFF);
			writeU16(os, (u16) (server_ids & 0xFFFF));
			for(std::set<s32>::iterator i = removed_server_ids.begin();
					i != removed_server_ids.end(); i++)
				writeS32(os, *i);
			std::string s = os.str();
			SharedBuffer<u8> data((u8*)s.c_str(), s.size());
			// Send as reliable
			Send(1, data, true);
		}
	}
}

bool Client::loadMedia(const std::string &data, const std::string &filename)
{
	// Silly irrlicht's const-incorrectness
	Buffer<char> data_rw(data.c_str(), data.size());

	std::string name;

	const char *image_ext[] = {
		".png", ".jpg", ".bmp", ".tga",
		".pcx", ".ppm", ".psd", ".wal", ".rgb",
		NULL
	};
	name = removeStringEnd(filename, image_ext);
	if(name != "")
	{
		verbosestream<<"Client: Attempting to load image "
		<<"file \""<<filename<<"\""<<std::endl;

		io::IFileSystem *irrfs = m_device->getFileSystem();
		video::IVideoDriver *vdrv = m_device->getVideoDriver();

		// Create an irrlicht memory file
		io::IReadFile *rfile = irrfs->createMemoryReadFile(
				*data_rw, data_rw.getSize(), "_tempreadfile");
		assert(rfile);
		// Read image
		video::IImage *img = vdrv->createImageFromFile(rfile);
		if(!img){
			errorstream<<"Client: Cannot create image from data of "
					<<"file \""<<filename<<"\""<<std::endl;
			rfile->drop();
			return false;
		}
		else {
			m_tsrc->insertSourceImage(filename, img);
			img->drop();
			rfile->drop();
			return true;
		}
	}

	const char *sound_ext[] = {
		".0.ogg", ".1.ogg", ".2.ogg", ".3.ogg", ".4.ogg",
		".5.ogg", ".6.ogg", ".7.ogg", ".8.ogg", ".9.ogg",
		".ogg", NULL
	};
	name = removeStringEnd(filename, sound_ext);
	if(name != "")
	{
		verbosestream<<"Client: Attempting to load sound "
		<<"file \""<<filename<<"\""<<std::endl;
		m_sound->loadSoundData(name, data);
		return true;
	}

	const char *model_ext[] = {
		".x", ".b3d", ".md2", ".obj",
		NULL
	};
	name = removeStringEnd(filename, model_ext);
	if(name != "")
	{
		verbosestream<<"Client: Storing model into memory: "
				<<"\""<<filename<<"\""<<std::endl;
		if(m_mesh_data.count(filename))
			errorstream<<"Multiple models with name \""<<filename.c_str()
					<<"\" found; replacing previous model"<<std::endl;
		m_mesh_data[filename] = data;
		return true;
	}

	errorstream<<"Client: Don't know how to load file \""
			<<filename<<"\""<<std::endl;
	return false;
}

// Virtual methods from con::PeerHandler
void Client::peerAdded(con::Peer *peer)
{
	infostream<<"Client::peerAdded(): peer->id="
			<<peer->id<<std::endl;
}
void Client::deletingPeer(con::Peer *peer, bool timeout)
{
	infostream<<"Client::deletingPeer(): "
			"Server Peer is getting deleted "
			<<"(timeout="<<timeout<<")"<<std::endl;
}

/*
	u16 command
	u16 number of files requested
	for each file {
		u16 length of name
		string name
	}
*/
void Client::request_media(const std::list<std::string> &file_requests)
{
	std::ostringstream os(std::ios_base::binary);
	writeU16(os, TOSERVER_REQUEST_MEDIA);
	size_t file_requests_size = file_requests.size();
	assert(file_requests_size <= 0xFFFF);
	writeU16(os, (u16) (file_requests_size & 0xFFFF));

	for(std::list<std::string>::const_iterator i = file_requests.begin();
			i != file_requests.end(); ++i) {
		os<<serializeString(*i);
	}

	// Make data buffer
	std::string s = os.str();
	SharedBuffer<u8> data((u8*)s.c_str(), s.size());
	// Send as reliable
	Send(1, data, true);
	infostream<<"Client: Sending media request list to server ("
			<<file_requests.size()<<" files)"<<std::endl;
}

void Client::received_media()
{
	// notify server we received everything
	std::ostringstream os(std::ios_base::binary);
	writeU16(os, TOSERVER_RECEIVED_MEDIA);
	std::string s = os.str();
	SharedBuffer<u8> data((u8*)s.c_str(), s.size());
	// Send as reliable
	Send(1, data, true);
	infostream<<"Client: Notifying server that we received all media"
			<<std::endl;
}

void Client::ReceiveAll()
{
	DSTACK(__FUNCTION_NAME);
	u32 start_ms = porting::getTimeMs();
	for(;;)
	{
		// Limit time even if there would be huge amounts of data to
		// process
		if(porting::getTimeMs() > start_ms + 100)
			break;

		try{
			Receive();
			g_profiler->graphAdd("client_received_packets", 1);
		}
		catch(con::NoIncomingDataException &e)
		{
			break;
		}
		catch(con::InvalidIncomingDataException &e)
		{
			infostream<<"Client::ReceiveAll(): "
					"InvalidIncomingDataException: what()="
					<<e.what()<<std::endl;
		}
	}
}

void Client::Receive()
{
	DSTACK(__FUNCTION_NAME);
	SharedBuffer<u8> data;
	u16 sender_peer_id;
	u32 datasize = m_con.Receive(sender_peer_id, data);
	ProcessData(*data, datasize, sender_peer_id);
}

/*
	sender_peer_id given to this shall be quaranteed to be a valid peer
*/
void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
{
	DSTACK(__FUNCTION_NAME);

	// Ignore packets that don't even fit a command
	if(datasize < 2)
	{
		m_packetcounter.add(60000);
		return;
	}

	ToClientCommand command = (ToClientCommand)readU16(&data[0]);

	//infostream<<"Client: received command="<<command<<std::endl;
	m_packetcounter.add((u16)command);

	/*
		If this check is removed, be sure to change the queue
		system to know the ids
	*/
	if(sender_peer_id != PEER_ID_SERVER)
	{
		infostream<<"Client::ProcessData(): Discarding data not "
				"coming from server: peer_id="<<sender_peer_id
				<<std::endl;
		return;
	}

	u8 ser_version = m_server_ser_ver;

	if(command == TOCLIENT_INIT)
	{
		if(datasize < 3)
			return;

		u8 deployed = data[2];

		infostream<<"Client: TOCLIENT_INIT received with "
				"deployed="<<((int)deployed&0xff)<<std::endl;

		if(!ser_ver_supported(deployed))
		{
			infostream<<"Client: TOCLIENT_INIT: Server sent "
					<<"unsupported ser_fmt_ver"<<std::endl;
			return;
		}

		m_server_ser_ver = deployed;

		// Get player position
		v3s16 playerpos_s16(0, BS*2+BS*20, 0);
		if(datasize >= 2+1+6)
			playerpos_s16 = readV3S16(&data[2+1]);
		v3f playerpos_f = intToFloat(playerpos_s16, BS) - v3f(0, BS/2, 0);


		// Set player position
		Player *player = m_env.getLocalPlayer();
		assert(player != NULL);
		player->setPosition(playerpos_f);

		if(datasize >= 2+1+6+8)
		{
			// Get map seed
			m_map_seed = readU64(&data[2+1+6]);
			infostream<<"Client: received map seed: "<<m_map_seed<<std::endl;
		}

		if(datasize >= 2+1+6+8+4)
		{
			// Get map seed
			m_recommended_send_interval = readF1000(&data[2+1+6+8]);
			infostream<<"Client: received recommended send interval "
					<<m_recommended_send_interval<<std::endl;
		}

		// Reply to server
		u32 replysize = 2;
		SharedBuffer<u8> reply(replysize);
		writeU16(&reply[0], TOSERVER_INIT2);
		// Send as reliable
		m_con.Send(PEER_ID_SERVER, 1, reply, true);

		m_state = LC_Init;

		return;
	}

	if(command == TOCLIENT_ACCESS_DENIED)
	{
		// The server didn't like our password. Note, this needs
		// to be processed even if the serialisation format has
		// not been agreed yet, the same as TOCLIENT_INIT.
		m_access_denied = true;
		m_access_denied_reason = L"Unknown";
		if(datasize >= 4)
		{
			std::string datastring((char*)&data[2], datasize-2);
			std::istringstream is(datastring, std::ios_base::binary);
			m_access_denied_reason = deSerializeWideString(is);
		}
		return;
	}

	if(ser_version == SER_FMT_VER_INVALID)
	{
		infostream<<"Client: Server serialization"
				" format invalid or not initialized."
				" Skipping incoming command="<<command<<std::endl;
		return;
	}

	/*
	  Handle runtime commands
	*/
	// there's no sane reason why we shouldn't have a player and
	// almost everyone needs a player reference
	Player *player = m_env.getLocalPlayer();
	assert(player != NULL);

	if(command == TOCLIENT_REMOVENODE)
	{
		if(datasize < 8)
			return;
		v3s16 p;
		p.X = readS16(&data[2]);
		p.Y = readS16(&data[4]);
		p.Z = readS16(&data[6]);
		removeNode(p);
	}
	else if(command == TOCLIENT_ADDNODE)
	{
		if(datasize < 8 + MapNode::serializedLength(ser_version))
			return;

		v3s16 p;
		p.X = readS16(&data[2]);
		p.Y = readS16(&data[4]);
		p.Z = readS16(&data[6]);

		MapNode n;
		n.deSerialize(&data[8], ser_version);

		bool remove_metadata = true;
		u32 index = 8 + MapNode::serializedLength(ser_version);
		if ((datasize >= index+1) && data[index]){
			remove_metadata = false;
		}

		addNode(p, n, remove_metadata);
	}
	else if(command == TOCLIENT_BLOCKDATA)
	{
		// Ignore too small packet
		if(datasize < 8)
			return;

		v3s16 p;
		p.X = readS16(&data[2]);
		p.Y = readS16(&data[4]);
		p.Z = readS16(&data[6]);

		std::string datastring((char*)&data[8], datasize-8);
		std::istringstream istr(datastring, std::ios_base::binary);

		MapSector *sector;
		MapBlock *block;

		v2s16 p2d(p.X, p.Z);
		sector = m_env.getMap().emergeSector(p2d);

		assert(sector->getPos() == p2d);

		block = sector->getBlockNoCreateNoEx(p.Y);
		if(block)
		{
			/*
				Update an existing block
			*/
			block->deSerialize(istr, ser_version, false);
			block->deSerializeNetworkSpecific(istr);
		}
		else
		{
			/*
				Create a new block
			*/
			block = new MapBlock(&m_env.getMap(), p, this);
			block->deSerialize(istr, ser_version, false);
			block->deSerializeNetworkSpecific(istr);
			sector->insertBlock(block);
		}

		if (localdb != NULL) {
			((ServerMap&) localserver->getMap()).saveBlock(block, localdb);
		}

		/*
			Add it to mesh update queue and set it to be acknowledged after update.
		*/
		addUpdateMeshTaskWithEdge(p, true);
	}
	else if(command == TOCLIENT_INVENTORY)
	{
		if(datasize < 3)
			return;

		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		player->inventory.deSerialize(is);

		m_inventory_updated = true;

		delete m_inventory_from_server;
		m_inventory_from_server = new Inventory(player->inventory);
		m_inventory_from_server_age = 0.0;

	}
	else if(command == TOCLIENT_TIME_OF_DAY)
	{
		if(datasize < 4)
			return;

		u16 time_of_day  = readU16(&data[2]);
		time_of_day      = time_of_day % 24000;
		float time_speed = 0;

		if(datasize >= 2 + 2 + 4)
		{
			time_speed = readF1000(&data[4]);
		}
		else {
			// Old message; try to approximate speed of time by ourselves
			float time_of_day_f = (float)time_of_day / 24000.0;
			float tod_diff_f = 0;

			if(time_of_day_f < 0.2 && m_last_time_of_day_f > 0.8)
				tod_diff_f = time_of_day_f - m_last_time_of_day_f + 1.0;
			else
				tod_diff_f = time_of_day_f - m_last_time_of_day_f;

			m_last_time_of_day_f         = time_of_day_f;
			float time_diff            = m_time_of_day_update_timer;
			m_time_of_day_update_timer = 0;

			if(m_time_of_day_set){
				time_speed = (3600.0*24.0) * tod_diff_f / time_diff;
				infostream<<"Client: Measured time_of_day speed (old format): "
						<<time_speed<<" tod_diff_f="<<tod_diff_f
						<<" time_diff="<<time_diff<<std::endl;
			}
		}

		// Update environment
		m_env.setTimeOfDay(time_of_day);
		m_env.setTimeOfDaySpeed(time_speed);
		m_time_of_day_set = true;

		u32 dr = m_env.getDayNightRatio();
		infostream<<"Client: time_of_day="<<time_of_day
				<<" time_speed="<<time_speed
				<<" dr="<<dr<<std::endl;
	}
	else if(command == TOCLIENT_CHAT_MESSAGE)
	{
		/*
			u16 command
			u16 length
			wstring message
		*/
		u8 buf[6];
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		// Read stuff
		is.read((char*) buf, 2);
		u16 len = readU16(buf);

		std::wstring message;
		for(unsigned int i=0; i<len; i++)
		{
			is.read((char*)buf, 2);
			message += (wchar_t)readU16(buf);
		}

		m_chat_queue.push_back(message);
	}
	else if(command == TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD)
	{
		/*
			u16 command
			u16 count of removed objects
			for all removed objects {
				u16 id
			}
			u16 count of added objects
			for all added objects {
				u16 id
				u8 type
				u32 initialization data length
				string initialization data
			}
		*/

		char buf[6];
		// Get all data except the command number
		std::string datastring((char*)&data[2], datasize-2);
		// Throw them in an istringstream
		std::istringstream is(datastring, std::ios_base::binary);

		// Read removed objects
		is.read(buf, 2);
		u16 removed_count = readU16((u8*)buf);
		for(unsigned int i=0; i<removed_count; i++)
		{
			is.read(buf, 2);
			u16 id = readU16((u8*)buf);
			m_env.removeActiveObject(id);
		}

		// Read added objects
		is.read(buf, 2);
		u16 added_count = readU16((u8*)buf);
		for(unsigned int i=0; i<added_count; i++)
		{
			is.read(buf, 2);
			u16 id = readU16((u8*)buf);
			is.read(buf, 1);
			u8 type = readU8((u8*)buf);
			std::string data = deSerializeLongString(is);
			// Add it
			m_env.addActiveObject(id, type, data);
		}
	}
	else if(command == TOCLIENT_ACTIVE_OBJECT_MESSAGES)
	{
		/*
			u16 command
			for all objects
			{
				u16 id
				u16 message length
				string message
			}
		*/
		char buf[6];
		// Get all data except the command number
		std::string datastring((char*)&data[2], datasize-2);
		// Throw them in an istringstream
		std::istringstream is(datastring, std::ios_base::binary);

		while(is.eof() == false)
		{
			is.read(buf, 2);
			u16 id = readU16((u8*)buf);
			if(is.eof())
				break;
			is.read(buf, 2);
			size_t message_size = readU16((u8*)buf);
			std::string message;
			message.reserve(message_size);
			for(unsigned int i=0; i<message_size; i++)
			{
				is.read(buf, 1);
				message.append(buf, 1);
			}
			// Pass on to the environment
			m_env.processActiveObjectMessage(id, message);
		}
	}
	else if(command == TOCLIENT_MOVEMENT)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		player->movement_acceleration_default   = readF1000(is) * BS;
		player->movement_acceleration_air       = readF1000(is) * BS;
		player->movement_acceleration_fast      = readF1000(is) * BS;
		player->movement_speed_walk             = readF1000(is) * BS;
		player->movement_speed_crouch           = readF1000(is) * BS;
		player->movement_speed_fast             = readF1000(is) * BS;
		player->movement_speed_climb            = readF1000(is) * BS;
		player->movement_speed_jump             = readF1000(is) * BS;
		player->movement_liquid_fluidity        = readF1000(is) * BS;
		player->movement_liquid_fluidity_smooth = readF1000(is) * BS;
		player->movement_liquid_sink            = readF1000(is) * BS;
		player->movement_gravity                = readF1000(is) * BS;
	}
	else if(command == TOCLIENT_HP)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		u8 oldhp   = player->hp;
		u8 hp      = readU8(is);
		player->hp = hp;

		if(hp < oldhp)
		{
			// Add to ClientEvent queue
			ClientEvent event;
			event.type = CE_PLAYER_DAMAGE;
			event.player_damage.amount = oldhp - hp;
			m_client_event_queue.push_back(event);
		}
	}
	else if(command == TOCLIENT_BREATH)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		player->setBreath(readU16(is));
	}
	else if(command == TOCLIENT_MOVE_PLAYER)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		v3f pos = readV3F1000(is);
		f32 pitch = readF1000(is);
		f32 yaw = readF1000(is);
		player->setPosition(pos);

		infostream<<"Client got TOCLIENT_MOVE_PLAYER"
				<<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
				<<" pitch="<<pitch
				<<" yaw="<<yaw
				<<std::endl;

		/*
			Add to ClientEvent queue.
			This has to be sent to the main program because otherwise
			it would just force the pitch and yaw values to whatever
			the camera points to.
		*/
		ClientEvent event;
		event.type = CE_PLAYER_FORCE_MOVE;
		event.player_force_move.pitch = pitch;
		event.player_force_move.yaw = yaw;
		m_client_event_queue.push_back(event);

		// Ignore damage for a few seconds, so that the player doesn't
		// get damage from falling on ground
		m_ignore_damage_timer = 3.0;
	}
	else if(command == TOCLIENT_PLAYERITEM)
	{
		infostream<<"Client: WARNING: Ignoring TOCLIENT_PLAYERITEM"<<std::endl;
	}
	else if(command == TOCLIENT_DEATHSCREEN)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		bool set_camera_point_target = readU8(is);
		v3f camera_point_target = readV3F1000(is);

		ClientEvent event;
		event.type                                = CE_DEATHSCREEN;
		event.deathscreen.set_camera_point_target = set_camera_point_target;
		event.deathscreen.camera_point_target_x   = camera_point_target.X;
		event.deathscreen.camera_point_target_y   = camera_point_target.Y;
		event.deathscreen.camera_point_target_z   = camera_point_target.Z;
		m_client_event_queue.push_back(event);
	}
	else if(command == TOCLIENT_ANNOUNCE_MEDIA)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		int num_files = readU16(is);

		infostream<<"Client: Received media announcement: packet size: "
				<<datasize<<std::endl;

		if (m_media_downloader == NULL ||
				m_media_downloader->isStarted()) {
			const char *problem = m_media_downloader ?
				"we already saw another announcement" :
				"all media has been received already";
			errorstream<<"Client: Received media announcement but "
				<<problem<<"! "
				<<" files="<<num_files
				<<" size="<<datasize<<std::endl;
			return;
		}

		// Mesh update thread must be stopped while
		// updating content definitions
		assert(!m_mesh_update_thread.IsRunning());

		for(int i=0; i<num_files; i++)
		{
			std::string name = deSerializeString(is);
			std::string sha1_base64 = deSerializeString(is);
			std::string sha1_raw = base64_decode(sha1_base64);
			m_media_downloader->addFile(name, sha1_raw);
		}

		std::vector<std::string> remote_media;
		try {
			Strfnd sf(deSerializeString(is));
			while(!sf.atend()) {
				std::string baseurl = trim(sf.next(","));
				if(baseurl != "")
					m_media_downloader->addRemoteServer(baseurl);
			}
		}
		catch(SerializationError& e) {
			// not supported by server or turned off
		}

		m_media_downloader->step(this);
	}
	else if(command == TOCLIENT_MEDIA)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		/*
			u16 command
			u16 total number of file bunches
			u16 index of this bunch
			u32 number of files in this bunch
			for each file {
				u16 length of name
				string name
				u32 length of data
				data
			}
		*/
		int num_bunches = readU16(is);
		int bunch_i = readU16(is);
		u32 num_files = readU32(is);
		infostream<<"Client: Received files: bunch "<<bunch_i<<"/"
				<<num_bunches<<" files="<<num_files
				<<" size="<<datasize<<std::endl;

		if (num_files == 0)
			return;

		if (m_media_downloader == NULL ||
				!m_media_downloader->isStarted()) {
			const char *problem = m_media_downloader ?
				"media has not been requested" :
				"all media has been received already";
			errorstream<<"Client: Received media but "
				<<problem<<"! "
				<<" bunch "<<bunch_i<<"/"<<num_bunches
				<<" files="<<num_files
				<<" size="<<datasize<<std::endl;
			return;
		}

		// Mesh update thread must be stopped while
		// updating content definitions
		assert(!m_mesh_update_thread.IsRunning());

		for(unsigned int i=0; i<num_files; i++){
			std::string name = deSerializeString(is);
			std::string data = deSerializeLongString(is);
			m_media_downloader->conventionalTransferDone(
					name, data, this);
		}
	}
	else if(command == TOCLIENT_TOOLDEF)
	{
		infostream<<"Client: WARNING: Ignoring TOCLIENT_TOOLDEF"<<std::endl;
	}
	else if(command == TOCLIENT_NODEDEF)
	{
		infostream<<"Client: Received node definitions: packet size: "
				<<datasize<<std::endl;

		// Mesh update thread must be stopped while
		// updating content definitions
		assert(!m_mesh_update_thread.IsRunning());

		// Decompress node definitions
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);
		std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
		std::ostringstream tmp_os;
		decompressZlib(tmp_is, tmp_os);

		// Deserialize node definitions
		std::istringstream tmp_is2(tmp_os.str());
		m_nodedef->deSerialize(tmp_is2);
		m_nodedef_received = true;
	}
	else if(command == TOCLIENT_CRAFTITEMDEF)
	{
		infostream<<"Client: WARNING: Ignoring TOCLIENT_CRAFTITEMDEF"<<std::endl;
	}
	else if(command == TOCLIENT_ITEMDEF)
	{
		infostream<<"Client: Received item definitions: packet size: "
				<<datasize<<std::endl;

		// Mesh update thread must be stopped while
		// updating content definitions
		assert(!m_mesh_update_thread.IsRunning());

		// Decompress item definitions
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);
		std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
		std::ostringstream tmp_os;
		decompressZlib(tmp_is, tmp_os);

		// Deserialize node definitions
		std::istringstream tmp_is2(tmp_os.str());
		m_itemdef->deSerialize(tmp_is2);
		m_itemdef_received = true;
	}
	else if(command == TOCLIENT_PLAY_SOUND)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		s32 server_id = readS32(is);
		std::string name = deSerializeString(is);
		float gain = readF1000(is);
		int type = readU8(is); // 0=local, 1=positional, 2=object
		v3f pos = readV3F1000(is);
		u16 object_id = readU16(is);
		bool loop = readU8(is);
		// Start playing
		int client_id = -1;
		switch(type){
		case 0: // local
			client_id = m_sound->playSound(name, loop, gain);
			break;
		case 1: // positional
			client_id = m_sound->playSoundAt(name, loop, gain, pos);
			break;
		case 2: { // object
			ClientActiveObject *cao = m_env.getActiveObject(object_id);
			if(cao)
				pos = cao->getPosition();
			client_id = m_sound->playSoundAt(name, loop, gain, pos);
			// TODO: Set up sound to move with object
			break; }
		default:
			break;
		}
		if(client_id != -1){
			m_sounds_server_to_client[server_id] = client_id;
			m_sounds_client_to_server[client_id] = server_id;
			if(object_id != 0)
				m_sounds_to_objects[client_id] = object_id;
		}
	}
	else if(command == TOCLIENT_STOP_SOUND)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		s32 server_id = readS32(is);
		std::map<s32, int>::iterator i =
				m_sounds_server_to_client.find(server_id);
		if(i != m_sounds_server_to_client.end()){
			int client_id = i->second;
			m_sound->stopSound(client_id);
		}
	}
	else if(command == TOCLIENT_PRIVILEGES)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		m_privileges.clear();
		infostream<<"Client: Privileges updated: ";
		u16 num_privileges = readU16(is);
		for(unsigned int i=0; i<num_privileges; i++){
			std::string priv = deSerializeString(is);
			m_privileges.insert(priv);
			infostream<<priv<<" ";
		}
		infostream<<std::endl;
	}
	else if(command == TOCLIENT_INVENTORY_FORMSPEC)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		// Store formspec in LocalPlayer
		player->inventory_formspec = deSerializeLongString(is);
	}
	else if(command == TOCLIENT_DETACHED_INVENTORY)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		std::string name = deSerializeString(is);

		infostream<<"Client: Detached inventory update: \""<<name<<"\""<<std::endl;

		Inventory *inv = NULL;


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