bug-fixin'
[oweals/minetest.git] / src / server.cpp
index 88a8492c1080f882cdf018edd0ee1185bcfe74b7..59d9acee4d033ba8f791b9ba5e3d3be73ee29961 100644 (file)
@@ -30,6 +30,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "main.h"
 #include "constants.h"
 #include "voxel.h"
+#include "materials.h"
+#include "mineral.h"
+
+#define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
 
 void * ServerThread::Thread()
 {
@@ -37,6 +41,8 @@ void * ServerThread::Thread()
 
        DSTACK(__FUNCTION_NAME);
 
+       BEGIN_DEBUG_EXCEPTION_HANDLER
+
        while(getRun())
        {
                try{
@@ -48,19 +54,13 @@ void * ServerThread::Thread()
                catch(con::NoIncomingDataException &e)
                {
                }
-#if CATCH_UNHANDLED_EXCEPTIONS
-               /*
-                       This is what has to be done in threads to get suitable debug info
-               */
-               catch(std::exception &e)
+               catch(con::PeerNotFoundException &e)
                {
-                       dstream<<std::endl<<DTIME<<"An unhandled exception occurred: "
-                                       <<e.what()<<std::endl;
-                       assert(0);
+                       dout_server<<"Server: PeerNotFoundException"<<std::endl;
                }
-#endif
        }
        
+       END_DEBUG_EXCEPTION_HANDLER
 
        return NULL;
 }
@@ -72,11 +72,9 @@ void * EmergeThread::Thread()
        DSTACK(__FUNCTION_NAME);
 
        bool debug=false;
-#if CATCH_UNHANDLED_EXCEPTIONS
-       try
-       {
-#endif
        
+       BEGIN_DEBUG_EXCEPTION_HANDLER
+
        /*
                Get block info from queue, emerge them and send them
                to clients.
@@ -95,7 +93,7 @@ void * EmergeThread::Thread()
                
                //derr_server<<"EmergeThread::Thread(): running"<<std::endl;
 
-               //TimeTaker timer("block emerge", g_device);
+               //TimeTaker timer("block emerge");
                
                /*
                        Try to emerge it from somewhere.
@@ -121,7 +119,7 @@ void * EmergeThread::Thread()
 
                                // Check flags
                                u8 flags = i.getNode()->getValue();
-                               if((flags & TOSERVER_GETBLOCK_FLAG_OPTIONAL) == false)
+                               if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
                                        optional = false;
                                
                        }
@@ -142,27 +140,76 @@ void * EmergeThread::Thread()
                
                {//envlock
 
+               //TimeTaker envlockwaittimer("block emerge envlock wait time");
+               
+               // 0-50ms
                JMutexAutoLock envlock(m_server->m_env_mutex);
 
-               //TimeTaker timer("block emerge envlock", g_device);
+               //envlockwaittimer.stop();
+
+               //TimeTaker timer("block emerge (while env locked)");
                        
                try{
                        bool only_from_disk = false;
                        
                        if(optional)
                                only_from_disk = true;
-
-                       block = map.emergeBlock(
-                                       p,
-                                       only_from_disk,
-                                       changed_blocks,
-                                       lighting_invalidated_blocks);
                        
+                       // First check if the block already exists
+                       //block = map.getBlockNoCreate(p);
+
+                       if(block == NULL)
+                       {
+                               //dstream<<"Calling emergeBlock"<<std::endl;
+                               block = map.emergeBlock(
+                                               p,
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+
+#if 0
+                               /*
+                                       EXPERIMENTAL: Create a few other blocks too
+                               */
+                               
+                               map.emergeBlock(
+                                               p + v3s16(0,1,0),
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+
+                               map.emergeBlock(
+                                               p + v3s16(0,-1,0),
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+#if 0
+                               map.emergeBlock(
+                                               p + v3s16(0,2,0),
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+
+                               map.emergeBlock(
+                                               p + v3s16(0,-2,0),
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+#endif
+#endif
+                       }
+
                        // If it is a dummy, block was not found on disk
                        if(block->isDummy())
                        {
                                //dstream<<"EmergeThread: Got a dummy block"<<std::endl;
                                got_block = false;
+
+                               if(only_from_disk == false)
+                               {
+                                       dstream<<"EmergeThread: wanted to generate a block but got a dummy"<<std::endl;
+                                       assert(0);
+                               }
                        }
                }
                catch(InvalidPositionException &e)
@@ -187,21 +234,6 @@ void * EmergeThread::Thread()
                                dout_server<<std::endl;
                        }
 
-                       /*
-                               Update water pressure
-                       */
-
-                       m_server->UpdateBlockWaterPressure(block, modified_blocks);
-
-                       for(core::map<v3s16, MapBlock*>::Iterator i = changed_blocks.getIterator();
-                                       i.atEnd() == false; i++)
-                       {
-                               MapBlock *block = i.getNode()->getValue();
-                               m_server->UpdateBlockWaterPressure(block, modified_blocks);
-                               //v3s16 p = i.getNode()->getKey();
-                               //m_server->UpdateBlockWaterPressure(p, modified_blocks);
-                       }
-
                        /*
                                Collect a list of blocks that have been modified in
                                addition to the fetched one.
@@ -216,8 +248,9 @@ void * EmergeThread::Thread()
                        }
                        
                        /*dstream<<"lighting "<<lighting_invalidated_blocks.size()
-                                       <<" blocks"<<std::endl;
-                       TimeTaker timer("** updateLighting", g_device);*/
+                                       <<" blocks"<<std::endl;*/
+                       
+                       //TimeTaker timer("** updateLighting");
                        
                        // Update lighting without locking the environment mutex,
                        // add modified blocks to changed blocks
@@ -264,18 +297,8 @@ void * EmergeThread::Thread()
                }
                
        }
-#if CATCH_UNHANDLED_EXCEPTIONS
-       }//try
-       /*
-               This is what has to be done in threads to get suitable debug info
-       */
-       catch(std::exception &e)
-       {
-               dstream<<std::endl<<DTIME<<"An unhandled exception occurred: "
-                               <<e.what()<<std::endl;
-               assert(0);
-       }
-#endif
+
+       END_DEBUG_EXCEPTION_HANDLER
 
        return NULL;
 }
@@ -285,6 +308,12 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 {
        DSTACK(__FUNCTION_NAME);
        
+       // Increment timers
+       {
+               JMutexAutoLock lock(m_blocks_sent_mutex);
+               m_nearest_unsent_reset_timer += dtime;
+       }
+
        // Won't send anything if already sending
        {
                JMutexAutoLock lock(m_blocks_sending_mutex);
@@ -299,12 +328,21 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 
        Player *player = server->m_env.getPlayer(peer_id);
 
+       assert(player != NULL);
+
        v3f playerpos = player->getPosition();
        v3f playerspeed = player->getSpeed();
 
        v3s16 center_nodepos = floatToInt(playerpos);
 
        v3s16 center = getNodeBlockPos(center_nodepos);
+       
+       // Camera position and direction
+       v3f camera_pos =
+                       playerpos + v3f(0, BS+BS/2, 0);
+       v3f camera_dir = v3f(0,0,1);
+       camera_dir.rotateYZBy(player->getPitch());
+       camera_dir.rotateXZBy(player->getYaw());
 
        /*
                Get the starting value of the block finder radius.
@@ -320,12 +358,13 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        m_last_center = center;
                }
 
-               static float reset_counter = 0;
-               reset_counter += dtime;
-               if(reset_counter > 5.0)
+               /*dstream<<"m_nearest_unsent_reset_timer="
+                               <<m_nearest_unsent_reset_timer<<std::endl;*/
+               if(m_nearest_unsent_reset_timer > 5.0)
                {
-                       reset_counter = 0;
+                       m_nearest_unsent_reset_timer = 0;
                        m_nearest_unsent_d = 0;
+                       //dstream<<"Resetting m_nearest_unsent_d"<<std::endl;
                }
 
                last_nearest_unsent_d = m_nearest_unsent_d;
@@ -346,13 +385,30 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
        {
                SharedPtr<JMutexAutoLock> lock(m_time_from_building.getLock());
                m_time_from_building.m_value += dtime;
-               if(m_time_from_building.m_value
-                               < FULL_BLOCK_SEND_ENABLE_MIN_TIME_FROM_BUILDING)
+               /*if(m_time_from_building.m_value
+                               < FULL_BLOCK_SEND_ENABLE_MIN_TIME_FROM_BUILDING)*/
+               if(m_time_from_building.m_value < g_settings.getFloat(
+                                       "full_block_send_enable_min_time_from_building"))
                {
                        maximum_simultaneous_block_sends
                                = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
                }
        }
+       
+       u32 num_blocks_selected;
+       {
+               JMutexAutoLock lock(m_blocks_sending_mutex);
+               num_blocks_selected = m_blocks_sending.size();
+       }
+       
+       /*
+               next time d will be continued from the d from which the nearest
+               unsent block was found this time.
+
+               This is because not necessarily any of the blocks found this
+               time are actually sent.
+       */
+       s32 new_nearest_unsent_d = -1;
 
        // Serialization version used
        //u8 ser_version = serialization_version;
@@ -380,12 +436,8 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        if(m_nearest_unsent_d != last_nearest_unsent_d)
                        {
                                d = m_nearest_unsent_d;
+                               last_nearest_unsent_d = m_nearest_unsent_d;
                        }
-                       else
-                       {
-                               m_nearest_unsent_d = d;
-                       }
-                       last_nearest_unsent_d = m_nearest_unsent_d;
                }
 
                /*
@@ -421,13 +473,13 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                JMutexAutoLock lock(m_blocks_sending_mutex);
                                
                                // Limit is dynamically lowered when building
-                               if(m_blocks_sending.size()
+                               if(num_blocks_selected
                                                >= maximum_simultaneous_block_sends_now)
                                {
                                        /*dstream<<"Not sending more blocks. Queue full. "
                                                        <<m_blocks_sending.size()
                                                        <<std::endl;*/
-                                       return;
+                                       goto queue_full;
                                }
 
                                if(m_blocks_sending.find(p) != NULL)
@@ -444,12 +496,62 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
                        || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
                                continue;
-
-                       bool generate = d <= d_max_gen;
                
-                       // Limit the generating area vertically to half
-                       if(abs(p.Y - center.Y) > d_max_gen / 2)
-                               generate = false;
+                       // If this is true, inexistent block will be made from scratch
+                       bool generate = d <= d_max_gen;
+                       
+                       {
+                               /*// Limit the generating area vertically to 2/3
+                               if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
+                                       generate = false;*/
+
+                               // Limit the send area vertically to 2/3
+                               if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
+                                       continue;
+                       }
+
+#if 0
+                       /*
+                               If block is far away, don't generate it unless it is
+                               near ground level
+
+                               NOTE: We can't know the ground level this way with the
+                               new generator.
+                       */
+                       if(d > 4)
+                       {
+                               v2s16 p2d(p.X, p.Z);
+                               MapSector *sector = NULL;
+                               try
+                               {
+                                       sector = server->m_env.getMap().getSectorNoGenerate(p2d);
+                               }
+                               catch(InvalidPositionException &e)
+                               {
+                               }
+
+                               if(sector != NULL)
+                               {
+                                       // Get center ground height in nodes
+                                       f32 gh = sector->getGroundHeight(
+                                                       v2s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2));
+                                       // Block center y in nodes
+                                       f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
+                                       // If differs a lot, don't generate
+                                       if(fabs(gh - y) > MAP_BLOCKSIZE*2)
+                                               generate = false;
+                               }
+                       }
+#endif
+
+                       /*
+                               Don't draw if not in sight
+                       */
+
+                       if(isBlockInSight(p, camera_pos, camera_dir, 10000*BS) == false)
+                       {
+                               continue;
+                       }
                        
                        /*
                                Don't send already sent blocks
@@ -460,20 +562,14 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                if(m_blocks_sent.find(p) != NULL)
                                        continue;
                        }
-                                       
+
                        /*
                                Check if map has this block
                        */
-                       MapBlock *block = NULL;
-                       try
-                       {
-                               block = server->m_env.getMap().getBlockNoCreate(p);
-                       }
-                       catch(InvalidPositionException &e)
-                       {
-                       }
+                       MapBlock *block = server->m_env.getMap().getBlockNoCreateNoEx(p);
                        
                        bool surely_not_found_on_disk = false;
+                       bool block_is_invalid = false;
                        if(block != NULL)
                        {
                                /*if(block->isIncomplete())
@@ -486,6 +582,22 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                {
                                        surely_not_found_on_disk = true;
                                }
+
+                               if(block->isValid() == false)
+                               {
+                                       block_is_invalid = true;
+                               }
+                               
+                               v2s16 p2d(p.X, p.Z);
+                               ServerMap *map = (ServerMap*)(&server->m_env.getMap());
+                               v2s16 chunkpos = map->sector_to_chunk(p2d);
+                               if(map->chunkNonVolatile(chunkpos) == false)
+                                       block_is_invalid = true;
+                               /*MapChunk *chunk = map->getChunk(chunkpos);
+                               if(chunk == NULL)
+                                       block_is_invalid = true;
+                               else if(chunk->getIsVolatile() == true)
+                                       block_is_invalid = true;*/
                        }
 
                        /*
@@ -498,11 +610,22 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                continue;
                        }
 
+                       /*
+                               Record the lowest d from which a a block has been
+                               found being not sent and possibly to exist
+                       */
+                       if(new_nearest_unsent_d == -1 || d < new_nearest_unsent_d)
+                       {
+                               new_nearest_unsent_d = d;
+                       }
+                                       
                        /*
                                Add inexistent block to emerge queue.
                        */
-                       if(block == NULL || surely_not_found_on_disk)
+                       if(block == NULL || surely_not_found_on_disk || block_is_invalid)
                        {
+                               //dstream<<"asd"<<std::endl;
+                               
                                /*SharedPtr<JMutexAutoLock> lock
                                                (m_num_blocks_in_emerge_queue.getLock());*/
                                
@@ -510,11 +633,13 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                // Allow only one block in emerge queue
                                if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
                                {
+                                       //dstream<<"Adding block to emerge queue"<<std::endl;
+                                       
                                        // Add it to the emerge queue and trigger the thread
                                        
                                        u8 flags = 0;
                                        if(generate == false)
-                                               flags |= TOSERVER_GETBLOCK_FLAG_OPTIONAL;
+                                               flags |= BLOCK_EMERGE_FLAG_FROMDISK;
                                        
                                        server->m_emerge_queue.addBlock(peer_id, p, flags);
                                        server->m_emergethread.trigger();
@@ -531,10 +656,17 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        PrioritySortedBlockTransfer q((float)d, p, peer_id);
 
                        dest.push_back(q);
+
+                       num_blocks_selected += 1;
                }
        }
+queue_full:
 
-       // Don't add anything here. The loop breaks by returning.
+       if(new_nearest_unsent_d != -1)
+       {
+               JMutexAutoLock lock(m_blocks_sent_mutex);
+               m_nearest_unsent_d = new_nearest_unsent_d;
+       }
 }
 
 void RemoteClient::SendObjectData(
@@ -579,8 +711,9 @@ void RemoteClient::SendObjectData(
        /*
                Get and write player data
        */
-
-       core::list<Player*> players = server->m_env.getPlayers();
+       
+       // Get connected players
+       core::list<Player*> players = server->m_env.getPlayers(true);
 
        // Write player count
        u16 playercount = players.size();
@@ -627,25 +760,23 @@ void RemoteClient::SendObjectData(
                - Add blocks to emerge queue if they are not found
 
                SUGGESTION: These could be ignored from the backside of the player
-
-               TODO: Keep track of total size of packet and stop when it is too big
        */
 
        Player *player = server->m_env.getPlayer(peer_id);
 
+       assert(player);
+
        v3f playerpos = player->getPosition();
        v3f playerspeed = player->getSpeed();
 
        v3s16 center_nodepos = floatToInt(playerpos);
        v3s16 center = getNodeBlockPos(center_nodepos);
 
-       //s16 d_max = ACTIVE_OBJECT_D_BLOCKS;
        s16 d_max = g_settings.getS16("active_object_range");
        
        // Number of blocks whose objects were written to bos
        u16 blockcount = 0;
 
-       //core::map<v3s16, MapBlock*> blocks;
        std::ostringstream bos(std::ios_base::binary);
 
        for(s16 d = 0; d <= d_max; d++)
@@ -674,18 +805,20 @@ void RemoteClient::SendObjectData(
                        // Get block
                        MapBlock *block = server->m_env.getMap().getBlockNoCreate(p);
 
-                       // Skip block if there are no objects
-                       if(block->getObjectCount() == 0)
-                               continue;
-                       
-                       // Step block if not in stepped_blocks and add to stepped_blocks
+                       /*
+                               Step block if not in stepped_blocks and add to stepped_blocks.
+                       */
                        if(stepped_blocks.find(p) == NULL)
                        {
-                               block->stepObjects(dtime, true);
+                               block->stepObjects(dtime, true, server->getDayNightRatio());
                                stepped_blocks.insert(p, true);
                                block->setChangedFlag();
                        }
 
+                       // Skip block if there are no objects
+                       if(block->getObjectCount() == 0)
+                               continue;
+                       
                        /*
                                Write objects
                        */
@@ -723,7 +856,7 @@ void RemoteClient::SendObjectData(
                                m_num_blocks_in_emerge_queue.m_value++;*/
                                
                                // Add to queue as an anonymous fetch from disk
-                               u8 flags = TOSERVER_GETBLOCK_FLAG_OPTIONAL;
+                               u8 flags = BLOCK_EMERGE_FLAG_FROMDISK;
                                server->m_emerge_queue.addBlock(0, p, flags);
                                server->m_emergethread.trigger();
                        }
@@ -759,20 +892,23 @@ void RemoteClient::GotBlock(v3s16 p)
        if(m_blocks_sending.find(p) != NULL)
                m_blocks_sending.remove(p);
        else
-               dstream<<"RemoteClient::GotBlock(): Didn't find in"
-                               " m_blocks_sending"<<std::endl;
+       {
+               /*dstream<<"RemoteClient::GotBlock(): Didn't find in"
+                               " m_blocks_sending"<<std::endl;*/
+               m_excess_gotblocks++;
+       }
        m_blocks_sent.insert(p, true);
 }
 
 void RemoteClient::SentBlock(v3s16 p)
 {
        JMutexAutoLock lock(m_blocks_sending_mutex);
-       if(m_blocks_sending.size() > 15)
+       /*if(m_blocks_sending.size() > 15)
        {
                dstream<<"RemoteClient::SentBlock(): "
                                <<"m_blocks_sending.size()="
                                <<m_blocks_sending.size()<<std::endl;
-       }
+       }*/
        if(m_blocks_sending.find(p) == NULL)
                m_blocks_sending.insert(p, 0.0);
        else
@@ -813,40 +949,6 @@ void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
        }
 }
 
-/*void RemoteClient::BlockEmerged()
-{
-       SharedPtr<JMutexAutoLock> lock(m_num_blocks_in_emerge_queue.getLock());
-       assert(m_num_blocks_in_emerge_queue.m_value > 0);
-       m_num_blocks_in_emerge_queue.m_value--;
-}*/
-
-/*void RemoteClient::RunSendingTimeouts(float dtime, float timeout)
-{
-       JMutexAutoLock sendinglock(m_blocks_sending_mutex);
-       
-       core::list<v3s16> remove_queue;
-       for(core::map<v3s16, float>::Iterator
-                       i = m_blocks_sending.getIterator();
-                       i.atEnd()==false; i++)
-       {
-               v3s16 p = i.getNode()->getKey();
-               float t = i.getNode()->getValue();
-               t += dtime;
-               i.getNode()->setValue(t);
-
-               if(t > timeout)
-               {
-                       remove_queue.push_back(p);
-               }
-       }
-       for(core::list<v3s16>::Iterator
-                       i = remove_queue.begin();
-                       i != remove_queue.end(); i++)
-       {
-               m_blocks_sending.remove(*i);
-       }
-}*/
-
 /*
        PlayerInfo
 */
@@ -858,9 +960,10 @@ PlayerInfo::PlayerInfo()
 
 void PlayerInfo::PrintLine(std::ostream *s)
 {
-       (*s)<<id<<": \""<<name<<"\" ("
-                       <<position.X<<","<<position.Y
-                       <<","<<position.Z<<") ";
+       (*s)<<id<<": ";
+       (*s)<<"\""<<name<<"\" ("
+                       <<(position.X/10)<<","<<(position.Y/10)
+                       <<","<<(position.Z/10)<<") ";
        address.print(s);
        (*s)<<" avg_rtt="<<avg_rtt;
        (*s)<<std::endl;
@@ -885,23 +988,39 @@ u32 PIChecksum(core::list<PlayerInfo> &l)
 */
 
 Server::Server(
-               std::string mapsavedir,
-               HMParams hm_params,
-               MapParams map_params
+               std::string mapsavedir
        ):
-       m_env(new ServerMap(mapsavedir, hm_params, map_params), dout_server),
+       m_env(new ServerMap(mapsavedir), dout_server),
        m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
        m_thread(this),
-       m_emergethread(this)
+       m_emergethread(this),
+       m_time_of_day(9000),
+       m_time_counter(0),
+       m_time_of_day_send_timer(0),
+       m_uptime(0),
+       m_mapsavedir(mapsavedir)
 {
+       //m_flowwater_timer = 0.0;
+       m_liquid_transform_timer = 0.0;
+       m_print_info_timer = 0.0;
+       m_objectdata_timer = 0.0;
+       m_emergethread_trigger_timer = 0.0;
+       m_savemap_timer = 0.0;
+       
        m_env_mutex.Init();
        m_con_mutex.Init();
        m_step_dtime_mutex.Init();
        m_step_dtime = 0.0;
+
+       // Load players
+       m_env.deSerializePlayers(m_mapsavedir);
 }
 
 Server::~Server()
 {
+       // Save players
+       m_env.serializePlayers(m_mapsavedir);
+       
        // Stop threads
        stop();
 
@@ -911,13 +1030,13 @@ Server::~Server()
                i = m_clients.getIterator();
                i.atEnd() == false; i++)
        {
-               u16 peer_id = i.getNode()->getKey();
-
-               // Delete player
+               /*// Delete player
+               // NOTE: These are removed by env destructor
                {
+                       u16 peer_id = i.getNode()->getKey();
                        JMutexAutoLock envlock(m_env_mutex);
                        m_env.removePlayer(peer_id);
-               }
+               }*/
                
                // Delete client
                delete i.getNode()->getValue();
@@ -981,21 +1100,72 @@ void Server::AsyncRunStep()
        if(dtime < 0.001)
                return;
        
+       //dstream<<"Server steps "<<dtime<<std::endl;
+       //dstream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
+       
        {
                JMutexAutoLock lock1(m_step_dtime_mutex);
-               m_step_dtime = 0.0;
+               m_step_dtime -= dtime;
        }
 
-       //dstream<<"Server steps "<<dtime<<std::endl;
+       /*
+               Update uptime
+       */
+       {
+               m_uptime.set(m_uptime.get() + dtime);
+       }
        
-       //dstream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
+       /*
+               Update m_time_of_day
+       */
+       {
+               m_time_counter += dtime;
+               f32 speed = g_settings.getFloat("time_speed") * 24000./(24.*3600);
+               u32 units = (u32)(m_time_counter*speed);
+               m_time_counter -= (f32)units / speed;
+               m_time_of_day.set((m_time_of_day.get() + units) % 24000);
+               
+               //dstream<<"Server: m_time_of_day = "<<m_time_of_day.get()<<std::endl;
+
+               /*
+                       Send to clients at constant intervals
+               */
+
+               m_time_of_day_send_timer -= dtime;
+               if(m_time_of_day_send_timer < 0.0)
+               {
+                       m_time_of_day_send_timer = g_settings.getFloat("time_send_interval");
+
+                       //JMutexAutoLock envlock(m_env_mutex);
+                       JMutexAutoLock conlock(m_con_mutex);
+
+                       for(core::map<u16, RemoteClient*>::Iterator
+                               i = m_clients.getIterator();
+                               i.atEnd() == false; i++)
+                       {
+                               RemoteClient *client = i.getNode()->getValue();
+                               //Player *player = m_env.getPlayer(client->peer_id);
+                               
+                               SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
+                                               m_time_of_day.get());
+                               // Send as reliable
+                               m_con.Send(client->peer_id, 0, data, true);
+                       }
+               }
+       }
+
        {
-               // Has to be locked for peerAdded/Removed
-               JMutexAutoLock lock1(m_env_mutex);
                // Process connection's timeouts
                JMutexAutoLock lock2(m_con_mutex);
                m_con.RunTimeouts(dtime);
        }
+       
+       {
+               // This has to be called so that the client list gets synced
+               // with the peer list of the connection
+               handlePeerChanges();
+       }
+
        {
                // Step environment
                // This also runs Map's timers
@@ -1006,58 +1176,36 @@ void Server::AsyncRunStep()
        /*
                Do background stuff
        */
-
+       
        /*
-               Flow water
+               Transform liquids
        */
+       m_liquid_transform_timer += dtime;
+       if(m_liquid_transform_timer >= 1.00)
        {
-               float interval;
+               m_liquid_transform_timer -= 1.00;
                
-               if(g_settings.getBool("endless_water") == false)
-                       interval = 1.0;
-               else
-                       interval = 0.25;
-
-               static float counter = 0.0;
-               counter += dtime;
-               if(counter >= 0.25 && m_flow_active_nodes.size() > 0)
-               {
+               JMutexAutoLock lock(m_env_mutex);
                
-               counter = 0.0;
-
                core::map<v3s16, MapBlock*> modified_blocks;
-
+               m_env.getMap().transformLiquids(modified_blocks);
+#if 0          
+               /*
+                       Update lighting
+               */
+               core::map<v3s16, MapBlock*> lighting_modified_blocks;
+               ServerMap &map = ((ServerMap&)m_env.getMap());
+               map.updateLighting(modified_blocks, lighting_modified_blocks);
+               
+               // Add blocks modified by lighting to modified_blocks
+               for(core::map<v3s16, MapBlock*>::Iterator
+                               i = lighting_modified_blocks.getIterator();
+                               i.atEnd() == false; i++)
                {
-
-                       JMutexAutoLock envlock(m_env_mutex);
-                       
-                       MapVoxelManipulator v(&m_env.getMap());
-                       v.m_disable_water_climb =
-                                       g_settings.getBool("disable_water_climb");
-                       
-                       if(g_settings.getBool("endless_water") == false)
-                               v.flowWater(m_flow_active_nodes, 0, false, 250);
-                       else
-                               v.flowWater(m_flow_active_nodes, 0, false, 50);
-
-                       v.blitBack(modified_blocks);
-
-                       ServerMap &map = ((ServerMap&)m_env.getMap());
-                       
-                       // Update lighting
-                       core::map<v3s16, MapBlock*> lighting_modified_blocks;
-                       map.updateLighting(modified_blocks, lighting_modified_blocks);
-                       
-                       // Add blocks modified by lighting to modified_blocks
-                       for(core::map<v3s16, MapBlock*>::Iterator
-                                       i = lighting_modified_blocks.getIterator();
-                                       i.atEnd() == false; i++)
-                       {
-                               MapBlock *block = i.getNode()->getValue();
-                               modified_blocks.insert(block->getPos(), block);
-                       }
-               } // envlock
-
+                       MapBlock *block = i.getNode()->getValue();
+                       modified_blocks.insert(block->getPos(), block);
+               }
+#endif
                /*
                        Set the modified blocks unsent for all the clients
                */
@@ -1076,13 +1224,11 @@ void Server::AsyncRunStep()
                                client->SetBlocksNotSent(modified_blocks);
                        }
                }
-
-               } // interval counter
        }
-       
+
        // Periodically print some info
        {
-               static float counter = 0.0;
+               float &counter = m_print_info_timer;
                counter += dtime;
                if(counter >= 30.0)
                {
@@ -1101,43 +1247,137 @@ void Server::AsyncRunStep()
                }
        }
 
-       // Run time- and client- related stuff
-       // NOTE: If you intend to add something here, check that it
-       // doesn't fit in RemoteClient::GetNextBlocks for example.
-       /*{
-               // Clients are behind connection lock
-               JMutexAutoLock lock(m_con_mutex);
+       /*
+               Update digging
+
+               NOTE: Some of this could be moved to RemoteClient
+       */
+#if 0
+       {
+               JMutexAutoLock envlock(m_env_mutex);
+               JMutexAutoLock conlock(m_con_mutex);
 
                for(core::map<u16, RemoteClient*>::Iterator
                        i = m_clients.getIterator();
                        i.atEnd() == false; i++)
                {
                        RemoteClient *client = i.getNode()->getValue();
-                       //con::Peer *peer = m_con.GetPeer(client->peer_id);
-                       //client->RunSendingTimeouts(dtime, peer->resend_timeout);
-               }
-       }*/
+                       Player *player = m_env.getPlayer(client->peer_id);
 
-       // Send object positions
-       {
-               static float counter = 0.0;
-               counter += dtime;
-               if(counter >= g_settings.getFloat("objectdata_interval"))
-               {
-                       JMutexAutoLock lock1(m_env_mutex);
-                       JMutexAutoLock lock2(m_con_mutex);
-                       SendObjectData(counter);
+                       JMutexAutoLock digmutex(client->m_dig_mutex);
 
-                       counter = 0.0;
-               }
-       }
-       
-       // Trigger emergethread (it gets somehow gets to a
-       // non-triggered but bysy state sometimes)
-       {
-               static float counter = 0.0;
-               counter += dtime;
-               if(counter >= 2.0)
+                       if(client->m_dig_tool_item == -1)
+                               continue;
+
+                       client->m_dig_time_remaining -= dtime;
+
+                       if(client->m_dig_time_remaining > 0)
+                       {
+                               client->m_time_from_building.set(0.0);
+                               continue;
+                       }
+
+                       v3s16 p_under = client->m_dig_position;
+                       
+                       // Mandatory parameter; actually used for nothing
+                       core::map<v3s16, MapBlock*> modified_blocks;
+
+                       u8 material;
+
+                       try
+                       {
+                               // Get material at position
+                               material = m_env.getMap().getNode(p_under).d;
+                               // If it's not diggable, do nothing
+                               if(content_diggable(material) == false)
+                               {
+                                       derr_server<<"Server: Not finishing digging: Node not diggable"
+                                                       <<std::endl;
+                                       client->m_dig_tool_item = -1;
+                                       break;
+                               }
+                       }
+                       catch(InvalidPositionException &e)
+                       {
+                               derr_server<<"Server: Not finishing digging: Node not found"
+                                               <<std::endl;
+                               client->m_dig_tool_item = -1;
+                               break;
+                       }
+                       
+                       // Create packet
+                       u32 replysize = 8;
+                       SharedBuffer<u8> reply(replysize);
+                       writeU16(&reply[0], TOCLIENT_REMOVENODE);
+                       writeS16(&reply[2], p_under.X);
+                       writeS16(&reply[4], p_under.Y);
+                       writeS16(&reply[6], p_under.Z);
+                       // Send as reliable
+                       m_con.SendToAll(0, reply, true);
+                       
+                       if(g_settings.getBool("creative_mode") == false)
+                       {
+                               // Add to inventory and send inventory
+                               InventoryItem *item = new MaterialItem(material, 1);
+                               player->inventory.addItem("main", item);
+                               SendInventory(player->peer_id);
+                       }
+
+                       /*
+                               Remove the node
+                               (this takes some time so it is done after the quick stuff)
+                       */
+                       m_env.getMap().removeNodeAndUpdate(p_under, modified_blocks);
+                       
+                       /*
+                               Update water
+                       */
+                       
+                       // Update water pressure around modification
+                       // This also adds it to m_flow_active_nodes if appropriate
+
+                       MapVoxelManipulator v(&m_env.getMap());
+                       v.m_disable_water_climb =
+                                       g_settings.getBool("disable_water_climb");
+                       
+                       VoxelArea area(p_under-v3s16(1,1,1), p_under+v3s16(1,1,1));
+
+                       try
+                       {
+                               v.updateAreaWaterPressure(area, m_flow_active_nodes);
+                       }
+                       catch(ProcessingLimitException &e)
+                       {
+                               dstream<<"Processing limit reached (1)"<<std::endl;
+                       }
+                       
+                       v.blitBack(modified_blocks);
+               }
+       }
+#endif
+
+       // Send object positions
+       {
+               float &counter = m_objectdata_timer;
+               counter += dtime;
+               if(counter >= g_settings.getFloat("objectdata_interval"))
+               {
+                       JMutexAutoLock lock1(m_env_mutex);
+                       JMutexAutoLock lock2(m_con_mutex);
+                       SendObjectData(counter);
+
+                       counter = 0.0;
+               }
+       }
+       
+       /*
+               Trigger emergethread (it somehow gets to a non-triggered but
+               bysy state sometimes)
+       */
+       {
+               float &counter = m_emergethread_trigger_timer;
+               counter += dtime;
+               if(counter >= 2.0)
                {
                        counter = 0.0;
                        
@@ -1147,15 +1387,28 @@ void Server::AsyncRunStep()
 
        // Save map
        {
-               static float counter = 0.0;
+               float &counter = m_savemap_timer;
                counter += dtime;
-               if(counter >= SERVER_MAP_SAVE_INTERVAL)
+               if(counter >= g_settings.getFloat("server_map_save_interval"))
                {
                        counter = 0.0;
 
                        JMutexAutoLock lock(m_env_mutex);
+
                        // Save only changed parts
                        m_env.getMap().save(true);
+
+                       // Delete unused sectors
+                       u32 deleted_count = m_env.getMap().deleteUnusedSectors(
+                                       g_settings.getFloat("server_unload_unused_sectors_timeout"));
+                       if(deleted_count > 0)
+                       {
+                               dout_server<<"Server: Unloaded "<<deleted_count
+                                               <<" sectors from memory"<<std::endl;
+                       }
+
+                       // Save players
+                       m_env.serializePlayers(m_mapsavedir);
                }
        }
 }
@@ -1169,9 +1422,14 @@ void Server::Receive()
        u32 datasize;
        try{
                {
-                       JMutexAutoLock lock(m_con_mutex);
+                       JMutexAutoLock conlock(m_con_mutex);
                        datasize = m_con.Receive(peer_id, *data, data_maxsize);
                }
+
+               // This has to be called so that the client list gets synced
+               // with the peer list of the connection
+               handlePeerChanges();
+
                ProcessData(*data, datasize, peer_id);
        }
        catch(con::InvalidIncomingDataException &e)
@@ -1262,20 +1520,63 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                /*
                        Set up player
                */
+               
+               // Get player name
+               const u32 playername_size = 20;
+               char playername[playername_size];
+               for(u32 i=0; i<playername_size-1; i++)
+               {
+                       playername[i] = data[3+i];
+               }
+               playername[playername_size-1] = 0;
+               
+               // Get player
+               Player *player = emergePlayer(playername, "", peer_id);
+               //Player *player = m_env.getPlayer(peer_id);
+
+               /*{
+                       // DEBUG: Test serialization
+                       std::ostringstream test_os;
+                       player->serialize(test_os);
+                       dstream<<"Player serialization test: \""<<test_os.str()
+                                       <<"\""<<std::endl;
+                       std::istringstream test_is(test_os.str());
+                       player->deSerialize(test_is);
+               }*/
+
+               // If failed, cancel
+               if(player == NULL)
+               {
+                       derr_server<<DTIME<<"Server: peer_id="<<peer_id
+                                       <<": failed to emerge player"<<std::endl;
+                       return;
+               }
 
-               Player *player = m_env.getPlayer(peer_id);
+               /*
+               // If a client is already connected to the player, cancel
+               if(player->peer_id != 0)
+               {
+                       derr_server<<DTIME<<"Server: peer_id="<<peer_id
+                                       <<" tried to connect to "
+                                       "an already connected player (peer_id="
+                                       <<player->peer_id<<")"<<std::endl;
+                       return;
+               }
+               // Set client of player
+               player->peer_id = peer_id;
+               */
 
                // Check if player doesn't exist
                if(player == NULL)
                        throw con::InvalidIncomingDataException
                                ("Server::ProcessData(): INIT: Player doesn't exist");
 
-               // update name if it was supplied
+               /*// update name if it was supplied
                if(datasize >= 20+3)
                {
                        data[20+3-1] = 0;
                        player->updateName((const char*)&data[3]);
-               }
+               }*/
 
                // Now answer with a TOCLIENT_INIT
                
@@ -1306,6 +1607,58 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
                // Send inventory to player
                SendInventory(peer->id);
+               
+               // Send time of day
+               {
+                       SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
+                                       m_time_of_day.get());
+                       m_con.Send(peer->id, 0, data, true);
+               }
+
+               // Send information about server to player in chat
+               {
+                       std::wostringstream os(std::ios_base::binary);
+                       os<<L"# Server: ";
+                       // Uptime
+                       os<<L"uptime="<<m_uptime.get();
+                       // Information about clients
+                       os<<L", clients={";
+                       for(core::map<u16, RemoteClient*>::Iterator
+                               i = m_clients.getIterator();
+                               i.atEnd() == false; i++)
+                       {
+                               // Get client and check that it is valid
+                               RemoteClient *client = i.getNode()->getValue();
+                               assert(client->peer_id == i.getNode()->getKey());
+                               if(client->serialization_version == SER_FMT_VER_INVALID)
+                                       continue;
+                               // Get player
+                               Player *player = m_env.getPlayer(client->peer_id);
+                               // Get name of player
+                               std::wstring name = L"unknown";
+                               if(player != NULL)
+                                       name = narrow_to_wide(player->getName());
+                               // Add name to information string
+                               os<<name<<L",";
+                       }
+                       os<<L"}";
+                       // Send message
+                       SendChatMessage(peer_id, os.str());
+               }
+               
+               // Send information about joining in chat
+               {
+                       std::wstring name = L"unknown";
+                       Player *player = m_env.getPlayer(peer_id);
+                       if(player != NULL)
+                               name = narrow_to_wide(player->getName());
+                       
+                       std::wstring message;
+                       message += L"*** ";
+                       message += name;
+                       message += L" joined game";
+                       BroadcastChatMessage(message);
+               }
 
                return;
        }
@@ -1428,7 +1781,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                }
                catch(InvalidPositionException &e)
                {
-                       derr_server<<"PICK_OBJECT block not found"<<std::endl;
+                       derr_server<<"CLICK_OBJECT block not found"<<std::endl;
                        return;
                }
 
@@ -1436,7 +1789,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
                if(obj == NULL)
                {
-                       derr_server<<"PICK_OBJECT object not found"<<std::endl;
+                       derr_server<<"CLICK_OBJECT object not found"<<std::endl;
                        return;
                }
 
@@ -1445,20 +1798,35 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                // Left click
                if(button == 0)
                {
-                       if(g_settings.getBool("creative_mode") == false)
+                       InventoryList *ilist = player->inventory.getList("main");
+                       if(g_settings.getBool("creative_mode") == false && ilist != NULL)
                        {
                        
                                // Skip if inventory has no free space
-                               if(player->inventory.getUsedSlots() == player->inventory.getSize())
+                               if(ilist->getUsedSlots() == ilist->getSize())
                                {
                                        dout_server<<"Player inventory has no free space"<<std::endl;
                                        return;
                                }
-                       
+                               
+                               /*
+                                       Create the inventory item
+                               */
+                               InventoryItem *item = NULL;
+                               // If it is an item-object, take the item from it
+                               if(obj->getTypeId() == MAPBLOCKOBJECT_TYPE_ITEM)
+                               {
+                                       item = ((ItemObject*)obj)->createInventoryItem();
+                               }
+                               // Else create an item of the object
+                               else
+                               {
+                                       item = new MapBlockObjectItem
+                                                       (obj->getInventoryString());
+                               }
+                               
                                // Add to inventory and send inventory
-                               InventoryItem *item = new MapBlockObjectItem
-                                               (obj->getInventoryString());
-                               player->inventory.addItem(item);
+                               ilist->addItem(item);
                                SendInventory(player->peer_id);
                        }
 
@@ -1466,19 +1834,23 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        block->removeObject(id);
                }
        }
-       else if(command == TOSERVER_PRESS_GROUND)
+       else if(command == TOSERVER_GROUND_ACTION)
        {
                if(datasize < 17)
                        return;
                /*
                        length: 17
                        [0] u16 command
-                       [2] u8 button (0=left, 1=right)
+                       [2] u8 action
                        [3] v3s16 nodepos_undersurface
                        [9] v3s16 nodepos_abovesurface
                        [15] u16 item
+                       actions:
+                       0: start digging
+                       1: place block
+                       2: stop digging (all parameters ignored)
                */
-               u8 button = readU8(&data[2]);
+               u8 action = readU8(&data[2]);
                v3s16 p_under;
                p_under.X = readS16(&data[3]);
                p_under.Y = readS16(&data[5]);
@@ -1492,35 +1864,68 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                //TODO: Check that target is reasonably close
                
                /*
-                       Left button digs ground
+                       0: start digging
                */
-               if(button == 0)
+               if(action == 0)
+               {
+                       /*
+                               NOTE: This can be used in the future to check if
+                               somebody is cheating, by checking the timing.
+                       */
+               } // action == 0
+
+               /*
+                       2: stop digging
+               */
+               else if(action == 2)
                {
+#if 0
+                       RemoteClient *client = getClient(peer->id);
+                       JMutexAutoLock digmutex(client->m_dig_mutex);
+                       client->m_dig_tool_item = -1;
+#endif
+               }
 
+               /*
+                       3: Digging completed
+               */
+               else if(action == 3)
+               {
+                       // Mandatory parameter; actually used for nothing
                        core::map<v3s16, MapBlock*> modified_blocks;
 
                        u8 material;
+                       u8 mineral = MINERAL_NONE;
 
                        try
                        {
+                               MapNode n = m_env.getMap().getNode(p_under);
                                // Get material at position
-                               material = m_env.getMap().getNode(p_under).d;
+                               material = n.d;
                                // If it's not diggable, do nothing
                                if(content_diggable(material) == false)
                                {
+                                       derr_server<<"Server: Not finishing digging: Node not diggable"
+                                                       <<std::endl;
                                        return;
                                }
+                               // Get mineral
+                               mineral = n.getMineral();
                        }
                        catch(InvalidPositionException &e)
                        {
-                               derr_server<<"Server: Ignoring REMOVENODE: Node not found"
+                               derr_server<<"Server: Not finishing digging: Node not found."
+                                               <<" Adding block to emerge queue."
                                                <<std::endl;
+                               m_emerge_queue.addBlock(peer_id,
+                                               getNodeBlockPos(p_over), BLOCK_EMERGE_FLAG_FROMDISK);
                                return;
                        }
                        
-                       // Reset build time counter
-                       getClient(peer->id)->m_time_from_building.set(0.0);
-                       
+                       /*
+                               Send the removal to all other clients
+                       */
+
                        // Create packet
                        u32 replysize = 8;
                        SharedBuffer<u8> reply(replysize);
@@ -1528,14 +1933,80 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        writeS16(&reply[2], p_under.X);
                        writeS16(&reply[4], p_under.Y);
                        writeS16(&reply[6], p_under.Z);
-                       // Send as reliable
-                       m_con.SendToAll(0, reply, true);
+
+                       for(core::map<u16, RemoteClient*>::Iterator
+                               i = m_clients.getIterator();
+                               i.atEnd() == false; i++)
+                       {
+                               // Get client and check that it is valid
+                               RemoteClient *client = i.getNode()->getValue();
+                               assert(client->peer_id == i.getNode()->getKey());
+                               if(client->serialization_version == SER_FMT_VER_INVALID)
+                                       continue;
+
+                               // Don't send if it's the same one
+                               if(peer_id == client->peer_id)
+                                       continue;
+
+                               // Send as reliable
+                               m_con.Send(client->peer_id, 0, reply, true);
+                       }
                        
+                       /*
+                               Update and send inventory
+                       */
+
                        if(g_settings.getBool("creative_mode") == false)
                        {
-                               // Add to inventory and send inventory
-                               InventoryItem *item = new MaterialItem(material, 1);
-                               player->inventory.addItem(item);
+                               /*
+                                       Wear out tool
+                               */
+                               InventoryList *mlist = player->inventory.getList("main");
+                               if(mlist != NULL)
+                               {
+                                       InventoryItem *item = mlist->getItem(item_i);
+                                       if(item && (std::string)item->getName() == "ToolItem")
+                                       {
+                                               ToolItem *titem = (ToolItem*)item;
+                                               std::string toolname = titem->getToolName();
+
+                                               // Get digging properties for material and tool
+                                               DiggingProperties prop =
+                                                               getDiggingProperties(material, toolname);
+
+                                               if(prop.diggable == false)
+                                               {
+                                                       derr_server<<"Server: WARNING: Player digged"
+                                                                       <<" with impossible material + tool"
+                                                                       <<" combination"<<std::endl;
+                                               }
+                                               
+                                               bool weared_out = titem->addWear(prop.wear);
+
+                                               if(weared_out)
+                                               {
+                                                       mlist->deleteItem(item_i);
+                                               }
+                                       }
+                               }
+
+                               /*
+                                       Add digged item to inventory
+                               */
+
+                               InventoryItem *item = NULL;
+
+                               if(mineral != MINERAL_NONE)
+                                       item = getDiggedMineralItem(mineral);
+
+                               if(item == NULL)
+                                       item = new MaterialItem(material, 1);
+
+                               player->inventory.addItem("main", item);
+
+                               /*
+                                       Send inventory
+                               */
                                SendInventory(player->peer_id);
                        }
 
@@ -1544,7 +2015,8 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                (this takes some time so it is done after the quick stuff)
                        */
                        m_env.getMap().removeNodeAndUpdate(p_under, modified_blocks);
-                       
+
+#if 0
                        /*
                                Update water
                        */
@@ -1568,19 +2040,21 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        }
                        
                        v.blitBack(modified_blocks);
-                       
-                       // Add the node to m_flow_active_nodes.
-                       //m_flow_active_nodes[p_under] = 1;
-
-               } // button == 0
+#endif
+               }
+               
                /*
-                       Right button places blocks and stuff
+                       1: place block
                */
-               else if(button == 1)
+               else if(action == 1)
                {
 
+                       InventoryList *ilist = player->inventory.getList("main");
+                       if(ilist == NULL)
+                               return;
+
                        // Get item
-                       InventoryItem *item = player->inventory.getItem(item_i);
+                       InventoryItem *item = ilist->getItem(item_i);
                        
                        // If there is no item, it is not possible to add it anywhere
                        if(item == NULL)
@@ -1595,12 +2069,26 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        // Don't add a node if this is not a free space
                                        MapNode n2 = m_env.getMap().getNode(p_over);
                                        if(content_buildable_to(n2.d) == false)
+                                       {
+                                               // Client probably has wrong data.
+                                               // Set block not sent, so that client will get
+                                               // a valid one.
+                                               dstream<<"Client "<<peer_id<<" tried to place"
+                                                               <<" node in invalid position; setting"
+                                                               <<" MapBlock not sent."<<std::endl;
+                                               RemoteClient *client = getClient(peer_id);
+                                               v3s16 blockpos = getNodeBlockPos(p_over);
+                                               client->SetBlockNotSent(blockpos);
                                                return;
+                                       }
                                }
                                catch(InvalidPositionException &e)
                                {
                                        derr_server<<"Server: Ignoring ADDNODE: Node not found"
+                                                       <<" Adding block to emerge queue."
                                                        <<std::endl;
+                                       m_emerge_queue.addBlock(peer_id,
+                                                       getNodeBlockPos(p_over), BLOCK_EMERGE_FLAG_FROMDISK);
                                        return;
                                }
 
@@ -1611,7 +2099,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                MaterialItem *mitem = (MaterialItem*)item;
                                MapNode n;
                                n.d = mitem->getMaterial();
-                               if(content_directional(n.d))
+                               if(content_features(n.d).wall_mounted)
                                        n.dir = packDir(p_under - p_over);
 
 #if 1
@@ -1629,11 +2117,12 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                /*
                                        Handle inventory
                                */
-                               if(g_settings.getBool("creative_mode") == false)
+                               InventoryList *ilist = player->inventory.getList("main");
+                               if(g_settings.getBool("creative_mode") == false && ilist)
                                {
                                        // Remove from inventory and send inventory
                                        if(mitem->getCount() == 1)
-                                               player->inventory.deleteItem(item_i);
+                                               ilist->deleteItem(item_i);
                                        else
                                                mitem->remove(1);
                                        // Send inventory
@@ -1652,11 +2141,12 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                /*
                                        Handle inventory
                                */
-                               if(g_settings.getBool("creative_mode") == false)
+                               InventoryList *ilist = player->inventory.getList("main");
+                               if(g_settings.getBool("creative_mode") == false && ilist)
                                {
                                        // Remove from inventory and send inventory
                                        if(mitem->getCount() == 1)
-                                               player->inventory.deleteItem(item_i);
+                                               ilist->deleteItem(item_i);
                                        else
                                                mitem->remove(1);
                                        // Send inventory
@@ -1690,7 +2180,8 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        }
                                }
 #endif
-                               
+
+#if 0
                                /*
                                        Update water
                                */
@@ -1714,19 +2205,13 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                }
                                
                                v.blitBack(modified_blocks);
+#endif
                        }
                        /*
-                               Handle block object items
+                               Handle other items
                        */
-                       else if(std::string("MBOItem") == item->getName())
+                       else
                        {
-                               MapBlockObjectItem *oitem = (MapBlockObjectItem*)item;
-
-                               /*dout_server<<"Trying to place a MapBlockObjectItem: "
-                                               "inventorystring=\""
-                                               <<oitem->getInventoryString()
-                                               <<"\""<<std::endl;*/
-
                                v3s16 blockpos = getNodeBlockPos(p_over);
 
                                MapBlock *block = NULL;
@@ -1751,37 +2236,76 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                                <<"("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
                                                <<std::endl;*/
 
+                               MapBlockObject *obj = NULL;
 
-                               MapBlockObject *obj = oitem->createObject
-                                               (pos, player->getYaw(), player->getPitch());
+                               /*
+                                       Handle block object items
+                               */
+                               if(std::string("MBOItem") == item->getName())
+                               {
+                                       MapBlockObjectItem *oitem = (MapBlockObjectItem*)item;
+
+                                       /*dout_server<<"Trying to place a MapBlockObjectItem: "
+                                                       "inventorystring=\""
+                                                       <<oitem->getInventoryString()
+                                                       <<"\""<<std::endl;*/
+                                                       
+                                       obj = oitem->createObject
+                                                       (pos, player->getYaw(), player->getPitch());
+                               }
+                               /*
+                                       Handle other items
+                               */
+                               else
+                               {
+                                       dout_server<<"Placing a miscellaneous item on map"
+                                                       <<std::endl;
+                                       /*
+                                               Create an ItemObject that contains the item.
+                                       */
+                                       ItemObject *iobj = new ItemObject(NULL, -1, pos);
+                                       std::ostringstream os(std::ios_base::binary);
+                                       item->serialize(os);
+                                       dout_server<<"Item string is \""<<os.str()<<"\""<<std::endl;
+                                       iobj->setItemString(os.str());
+                                       obj = iobj;
+                               }
 
                                if(obj == NULL)
-                                       derr_server<<"WARNING: oitem created NULL object"
+                               {
+                                       derr_server<<"WARNING: item resulted in NULL object, "
+                                                       <<"not placing onto map"
                                                        <<std::endl;
+                               }
+                               else
+                               {
+                                       block->addObject(obj);
 
-                               block->addObject(obj);
-
-                               //dout_server<<"Placed object"<<std::endl;
+                                       dout_server<<"Placed object"<<std::endl;
 
-                               if(g_settings.getBool("creative_mode") == false)
-                               {
-                                       // Remove from inventory and send inventory
-                                       player->inventory.deleteItem(item_i);
-                                       // Send inventory
-                                       SendInventory(peer_id);
+                                       InventoryList *ilist = player->inventory.getList("main");
+                                       if(g_settings.getBool("creative_mode") == false && ilist)
+                                       {
+                                               // Remove from inventory and send inventory
+                                               ilist->deleteItem(item_i);
+                                               // Send inventory
+                                               SendInventory(peer_id);
+                                       }
                                }
                        }
 
-               } // button == 1
+               } // action == 1
+
                /*
-                       Catch invalid buttons
+                       Catch invalid actions
                */
                else
                {
-                       derr_server<<"WARNING: Server: Invalid button "
-                                       <<button<<std::endl;
+                       derr_server<<"WARNING: Server: Invalid action "
+                                       <<action<<std::endl;
                }
        }
+#if 0
        else if(command == TOSERVER_RELEASE)
        {
                if(datasize < 3)
@@ -1791,8 +2315,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        [0] u16 command
                        [2] u8 button
                */
-               //TODO
+               dstream<<"TOSERVER_RELEASE ignored"<<std::endl;
        }
+#endif
        else if(command == TOSERVER_SIGNTEXT)
        {
                /*
@@ -1850,23 +2375,149 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
                obj->getBlock()->setChangedFlag();
        }
-       else
-       {
-               derr_server<<"WARNING: Server::ProcessData(): Ignoring "
-                               "unknown command "<<command<<std::endl;
-       }
-       
-       } //try
-       catch(SendFailedException &e)
+       else if(command == TOSERVER_INVENTORY_ACTION)
        {
-               derr_server<<"Server::ProcessData(): SendFailedException: "
-                               <<"what="<<e.what()
-                               <<std::endl;
-       }
-}
-
-/*void Server::Send(u16 peer_id, u16 channelnum,
-               SharedBuffer<u8> data, bool reliable)
+               /*// Ignore inventory changes if in creative mode
+               if(g_settings.getBool("creative_mode") == true)
+               {
+                       dstream<<"TOSERVER_INVENTORY_ACTION: ignoring in creative mode"
+                                       <<std::endl;
+                       return;
+               }*/
+               // Strip command and create a stream
+               std::string datastring((char*)&data[2], datasize-2);
+               dstream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
+               std::istringstream is(datastring, std::ios_base::binary);
+               // Create an action
+               InventoryAction *a = InventoryAction::deSerialize(is);
+               if(a != NULL)
+               {
+                       /*
+                               Handle craftresult specially if not in creative mode
+                       */
+                       bool disable_action = false;
+                       if(a->getType() == IACTION_MOVE
+                                       && g_settings.getBool("creative_mode") == false)
+                       {
+                               IMoveAction *ma = (IMoveAction*)a;
+                               // Don't allow moving anything to craftresult
+                               if(ma->to_name == "craftresult")
+                               {
+                                       // Do nothing
+                                       disable_action = true;
+                               }
+                               // When something is removed from craftresult
+                               if(ma->from_name == "craftresult")
+                               {
+                                       disable_action = true;
+                                       // Remove stuff from craft
+                                       InventoryList *clist = player->inventory.getList("craft");
+                                       if(clist)
+                                       {
+                                               u16 count = ma->count;
+                                               if(count == 0)
+                                                       count = 1;
+                                               clist->decrementMaterials(count);
+                                       }
+                                       // Do action
+                                       // Feed action to player inventory
+                                       a->apply(&player->inventory);
+                                       // Eat it
+                                       delete a;
+                                       // If something appeared in craftresult, throw it
+                                       // in the main list
+                                       InventoryList *rlist = player->inventory.getList("craftresult");
+                                       InventoryList *mlist = player->inventory.getList("main");
+                                       if(rlist && mlist && rlist->getUsedSlots() == 1)
+                                       {
+                                               InventoryItem *item1 = rlist->changeItem(0, NULL);
+                                               mlist->addItem(item1);
+                                       }
+                               }
+                       }
+                       if(disable_action == false)
+                       {
+                               // Feed action to player inventory
+                               a->apply(&player->inventory);
+                               // Eat it
+                               delete a;
+                       }
+                       // Send inventory
+                       SendInventory(player->peer_id);
+               }
+               else
+               {
+                       dstream<<"TOSERVER_INVENTORY_ACTION: "
+                                       <<"InventoryAction::deSerialize() returned NULL"
+                                       <<std::endl;
+               }
+       }
+       else if(command == TOSERVER_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(u16 i=0; i<len; i++)
+               {
+                       is.read((char*)buf, 2);
+                       message += (wchar_t)readU16(buf);
+               }
+
+               // Get player name of this client
+               std::wstring name = narrow_to_wide(player->getName());
+
+               std::wstring line = std::wstring(L"<")+name+L"> "+message;
+               
+               dstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
+
+               /*
+                       Send the message to all other clients
+               */
+               for(core::map<u16, RemoteClient*>::Iterator
+                       i = m_clients.getIterator();
+                       i.atEnd() == false; i++)
+               {
+                       // Get client and check that it is valid
+                       RemoteClient *client = i.getNode()->getValue();
+                       assert(client->peer_id == i.getNode()->getKey());
+                       if(client->serialization_version == SER_FMT_VER_INVALID)
+                               continue;
+
+                       // Don't send if it's the same one
+                       if(peer_id == client->peer_id)
+                               continue;
+
+                       SendChatMessage(client->peer_id, line);
+               }
+       }
+       else
+       {
+               derr_server<<"WARNING: Server::ProcessData(): Ignoring "
+                               "unknown command "<<command<<std::endl;
+       }
+       
+       } //try
+       catch(SendFailedException &e)
+       {
+               derr_server<<"Server::ProcessData(): SendFailedException: "
+                               <<"what="<<e.what()
+                               <<std::endl;
+       }
+}
+
+/*void Server::Send(u16 peer_id, u16 channelnum,
+               SharedBuffer<u8> data, bool reliable)
 {
        JMutexAutoLock lock(m_con_mutex);
        m_con.Send(peer_id, channelnum, data, reliable);
@@ -1919,15 +2570,17 @@ core::list<PlayerInfo> Server::getPlayerInfo()
                PlayerInfo info;
 
                Player *player = *i;
+
                try{
                        con::Peer *peer = m_con.GetPeer(player->peer_id);
+                       // Copy info from peer to info struct
                        info.id = peer->id;
                        info.address = peer->address;
                        info.avg_rtt = peer->avg_rtt;
                }
                catch(con::PeerNotFoundException &e)
                {
-                       // Outdated peer info
+                       // Set dummy peer info
                        info.id = 0;
                        info.address = Address(0,0,0,0,0);
                        info.avg_rtt = 0.0;
@@ -1948,113 +2601,11 @@ void Server::peerAdded(con::Peer *peer)
        dout_server<<"Server::peerAdded(): peer->id="
                        <<peer->id<<std::endl;
        
-       // Connection is already locked when this is called.
-       //JMutexAutoLock lock(m_con_mutex);
-       
-       // Error check
-       core::map<u16, RemoteClient*>::Node *n;
-       n = m_clients.find(peer->id);
-       // The client shouldn't already exist
-       assert(n == NULL);
-
-       // Create client
-       RemoteClient *client = new RemoteClient();
-       client->peer_id = peer->id;
-       m_clients.insert(client->peer_id, client);
-
-       // Create player
-       {
-               // Already locked when called
-               //JMutexAutoLock envlock(m_env_mutex);
-               
-               Player *player = m_env.getPlayer(peer->id);
-               
-               // The player shouldn't already exist
-               assert(player == NULL);
-
-               player = new RemotePlayer();
-               player->peer_id = peer->id;
-
-               /*
-                       Set player position
-               */
-
-               // Get zero sector (it could have been unloaded to disk)
-               m_env.getMap().emergeSector(v2s16(0,0));
-               // Get ground height at origin
-               f32 groundheight = m_env.getMap().getGroundHeight(v2s16(0,0), true);
-               // The zero sector should have been generated
-               assert(groundheight > GROUNDHEIGHT_VALID_MINVALUE);
-               // Don't go underwater
-               if(groundheight < WATER_LEVEL)
-                       groundheight = WATER_LEVEL;
-
-               player->setPosition(intToFloat(v3s16(
-                               0,
-                               groundheight + 1,
-                               0
-               )));
-
-               /*
-                       Add player to environment
-               */
-
-               m_env.addPlayer(player);
-
-               /*
-                       Add stuff to inventory
-               */
-               
-               if(g_settings.getBool("creative_mode"))
-               {
-                       // Give all materials
-                       assert(USEFUL_CONTENT_COUNT <= PLAYER_INVENTORY_SIZE);
-                       for(u16 i=0; i<USEFUL_CONTENT_COUNT; i++)
-                       {
-                               // Skip some materials
-                               if(i == CONTENT_OCEAN)
-                                       continue;
-
-                               InventoryItem *item = new MaterialItem(i, 1);
-                               player->inventory.addItem(item);
-                       }
-                       // Sign
-                       {
-                               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
-                               bool r = player->inventory.addItem(item);
-                               assert(r == true);
-                       }
-                       /*// Rat
-                       {
-                               InventoryItem *item = new MapBlockObjectItem("Rat");
-                               bool r = player->inventory.addItem(item);
-                               assert(r == true);
-                       }*/
-               }
-               else
-               {
-                       // Give some lights
-                       {
-                               InventoryItem *item = new MaterialItem(3, 999);
-                               bool r = player->inventory.addItem(item);
-                               assert(r == true);
-                       }
-                       // and some signs
-                       for(u16 i=0; i<4; i++)
-                       {
-                               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
-                               bool r = player->inventory.addItem(item);
-                               assert(r == true);
-                       }
-                       /*// and some rats
-                       for(u16 i=0; i<4; i++)
-                       {
-                               InventoryItem *item = new MapBlockObjectItem("Rat");
-                               bool r = player->inventory.addItem(item);
-                               assert(r == true);
-                       }*/
-               }
-       }
+       PeerChange c;
+       c.type = PEER_ADDED;
+       c.peer_id = peer->id;
+       c.timeout = false;
+       m_peer_change_queue.push_back(c);
 }
 
 void Server::deletingPeer(con::Peer *peer, bool timeout)
@@ -2063,28 +2614,11 @@ void Server::deletingPeer(con::Peer *peer, bool timeout)
        dout_server<<"Server::deletingPeer(): peer->id="
                        <<peer->id<<", timeout="<<timeout<<std::endl;
        
-       // Connection is already locked when this is called.
-       //JMutexAutoLock lock(m_con_mutex);
-
-       // Error check
-       core::map<u16, RemoteClient*>::Node *n;
-       n = m_clients.find(peer->id);
-       // The client should exist
-       assert(n != NULL);
-       
-       // Delete player
-       {
-               // Already locked when called
-               //JMutexAutoLock envlock(m_env_mutex);
-               m_env.removePlayer(peer->id);
-       }
-       
-       // Delete client
-       delete m_clients[peer->id];
-       m_clients.remove(peer->id);
-
-       // Send player info to all clients
-       SendPlayerInfos();
+       PeerChange c;
+       c.type = PEER_REMOVED;
+       c.peer_id = peer->id;
+       c.timeout = timeout;
+       m_peer_change_queue.push_back(c);
 }
 
 void Server::SendObjectData(float dtime)
@@ -2114,7 +2648,8 @@ void Server::SendPlayerInfos()
 
        //JMutexAutoLock envlock(m_env_mutex);
        
-       core::list<Player*> players = m_env.getPlayers();
+       // Get connected players
+       core::list<Player*> players = m_env.getPlayers(true);
        
        u32 player_count = players.getSize();
        u32 datasize = 2+(2+PLAYERNAME_SIZE)*player_count;
@@ -2133,6 +2668,7 @@ void Server::SendPlayerInfos()
                                "peer_id="<<player->peer_id<<std::endl;*/
                
                writeU16(&data[start], player->peer_id);
+               memset((char*)&data[start+2], 0, PLAYERNAME_SIZE);
                snprintf((char*)&data[start+2], PLAYERNAME_SIZE, "%s", player->getName());
                start += 2+PLAYERNAME_SIZE;
        }
@@ -2143,14 +2679,295 @@ void Server::SendPlayerInfos()
        m_con.SendToAll(0, data, true);
 }
 
+enum ItemSpecType
+{
+       ITEM_NONE,
+       ITEM_MATERIAL,
+       ITEM_CRAFT,
+       ITEM_TOOL,
+       ITEM_MBO
+};
+
+struct ItemSpec
+{
+       ItemSpec():
+               type(ITEM_NONE)
+       {
+       }
+       ItemSpec(enum ItemSpecType a_type, std::string a_name):
+               type(a_type),
+               name(a_name),
+               num(65535)
+       {
+       }
+       ItemSpec(enum ItemSpecType a_type, u16 a_num):
+               type(a_type),
+               name(""),
+               num(a_num)
+       {
+       }
+       enum ItemSpecType type;
+       // Only other one of these is used
+       std::string name;
+       u16 num;
+};
+
+/*
+       items: a pointer to an array of 9 pointers to items
+       specs: a pointer to an array of 9 ItemSpecs
+*/
+bool checkItemCombination(InventoryItem **items, ItemSpec *specs)
+{
+       u16 items_min_x = 100;
+       u16 items_max_x = 100;
+       u16 items_min_y = 100;
+       u16 items_max_y = 100;
+       for(u16 y=0; y<3; y++)
+       for(u16 x=0; x<3; x++)
+       {
+               if(items[y*3 + x] == NULL)
+                       continue;
+               if(items_min_x == 100 || x < items_min_x)
+                       items_min_x = x;
+               if(items_min_y == 100 || y < items_min_y)
+                       items_min_y = y;
+               if(items_max_x == 100 || x > items_max_x)
+                       items_max_x = x;
+               if(items_max_y == 100 || y > items_max_y)
+                       items_max_y = y;
+       }
+       // No items at all, just return false
+       if(items_min_x == 100)
+               return false;
+       
+       u16 items_w = items_max_x - items_min_x + 1;
+       u16 items_h = items_max_y - items_min_y + 1;
+
+       u16 specs_min_x = 100;
+       u16 specs_max_x = 100;
+       u16 specs_min_y = 100;
+       u16 specs_max_y = 100;
+       for(u16 y=0; y<3; y++)
+       for(u16 x=0; x<3; x++)
+       {
+               if(specs[y*3 + x].type == ITEM_NONE)
+                       continue;
+               if(specs_min_x == 100 || x < specs_min_x)
+                       specs_min_x = x;
+               if(specs_min_y == 100 || y < specs_min_y)
+                       specs_min_y = y;
+               if(specs_max_x == 100 || x > specs_max_x)
+                       specs_max_x = x;
+               if(specs_max_y == 100 || y > specs_max_y)
+                       specs_max_y = y;
+       }
+       // No specs at all, just return false
+       if(specs_min_x == 100)
+               return false;
+
+       u16 specs_w = specs_max_x - specs_min_x + 1;
+       u16 specs_h = specs_max_y - specs_min_y + 1;
+
+       // Different sizes
+       if(items_w != specs_w || items_h != specs_h)
+               return false;
+
+       for(u16 y=0; y<specs_h; y++)
+       for(u16 x=0; x<specs_w; x++)
+       {
+               u16 items_x = items_min_x + x;
+               u16 items_y = items_min_y + y;
+               u16 specs_x = specs_min_x + x;
+               u16 specs_y = specs_min_y + y;
+               InventoryItem *item = items[items_y * 3 + items_x];
+               ItemSpec &spec = specs[specs_y * 3 + specs_x];
+               
+               if(spec.type == ITEM_NONE)
+               {
+                       // Has to be no item
+                       if(item != NULL)
+                               return false;
+                       continue;
+               }
+               
+               // There should be an item
+               if(item == NULL)
+                       return false;
+
+               std::string itemname = item->getName();
+
+               if(spec.type == ITEM_MATERIAL)
+               {
+                       if(itemname != "MaterialItem")
+                               return false;
+                       MaterialItem *mitem = (MaterialItem*)item;
+                       if(mitem->getMaterial() != spec.num)
+                               return false;
+               }
+               else if(spec.type == ITEM_CRAFT)
+               {
+                       if(itemname != "CraftItem")
+                               return false;
+                       CraftItem *mitem = (CraftItem*)item;
+                       if(mitem->getSubName() != spec.name)
+                               return false;
+               }
+               else if(spec.type == ITEM_TOOL)
+               {
+                       // Not supported yet
+                       assert(0);
+               }
+               else if(spec.type == ITEM_MBO)
+               {
+                       // Not supported yet
+                       assert(0);
+               }
+               else
+               {
+                       // Not supported yet
+                       assert(0);
+               }
+       }
+
+       return true;
+}
+
 void Server::SendInventory(u16 peer_id)
 {
        DSTACK(__FUNCTION_NAME);
        
-       //JMutexAutoLock envlock(m_env_mutex);
-       
        Player* player = m_env.getPlayer(peer_id);
 
+       /*
+               Calculate crafting stuff
+       */
+       if(g_settings.getBool("creative_mode") == false)
+       {
+               InventoryList *clist = player->inventory.getList("craft");
+               InventoryList *rlist = player->inventory.getList("craftresult");
+               if(rlist)
+               {
+                       rlist->clearItems();
+               }
+               if(clist && rlist)
+               {
+                       InventoryItem *items[9];
+                       for(u16 i=0; i<9; i++)
+                       {
+                               items[i] = clist->getItem(i);
+                       }
+                       
+                       bool found = false;
+
+                       // Wood
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_TREE);
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new MaterialItem(CONTENT_WOOD, 4));
+                                       found = true;
+                               }
+                       }
+
+                       // Stick
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new CraftItem("Stick", 4));
+                                       found = true;
+                               }
+                       }
+
+                       // Sign
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[1] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[2] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[3] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[4] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[5] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[7] = ItemSpec(ITEM_CRAFT, "Stick");
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new MapBlockObjectItem("Sign"));
+                                       found = true;
+                               }
+                       }
+
+                       // Torch
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_CRAFT, "lump_of_coal");
+                               specs[3] = ItemSpec(ITEM_CRAFT, "Stick");
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new MaterialItem(CONTENT_TORCH, 4));
+                                       found = true;
+                               }
+                       }
+
+                       // Wooden pick
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[1] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[2] = ItemSpec(ITEM_MATERIAL, CONTENT_WOOD);
+                               specs[4] = ItemSpec(ITEM_CRAFT, "Stick");
+                               specs[7] = ItemSpec(ITEM_CRAFT, "Stick");
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new ToolItem("WPick", 0));
+                                       found = true;
+                               }
+                       }
+
+                       // Stone pick
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_STONE);
+                               specs[1] = ItemSpec(ITEM_MATERIAL, CONTENT_STONE);
+                               specs[2] = ItemSpec(ITEM_MATERIAL, CONTENT_STONE);
+                               specs[4] = ItemSpec(ITEM_CRAFT, "Stick");
+                               specs[7] = ItemSpec(ITEM_CRAFT, "Stick");
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new ToolItem("STPick", 0));
+                                       found = true;
+                               }
+                       }
+
+                       // Mese pick
+                       if(!found)
+                       {
+                               ItemSpec specs[9];
+                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_MESE);
+                               specs[1] = ItemSpec(ITEM_MATERIAL, CONTENT_MESE);
+                               specs[2] = ItemSpec(ITEM_MATERIAL, CONTENT_MESE);
+                               specs[4] = ItemSpec(ITEM_CRAFT, "Stick");
+                               specs[7] = ItemSpec(ITEM_CRAFT, "Stick");
+                               if(checkItemCombination(items, specs))
+                               {
+                                       rlist->addItem(new ToolItem("MesePick", 0));
+                                       found = true;
+                               }
+                       }
+               }
+       } // if creative_mode == false
+
+       /*
+               Serialize it
+       */
+
        std::ostringstream os;
        //os.imbue(std::locale("C"));
 
@@ -2162,12 +2979,56 @@ void Server::SendInventory(u16 peer_id)
        writeU16(&data[0], TOCLIENT_INVENTORY);
        memcpy(&data[2], s.c_str(), s.size());
        
-       //JMutexAutoLock conlock(m_con_mutex);
+       // Send as reliable
+       m_con.Send(peer_id, 0, data, true);
+}
 
+void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
+{
+       DSTACK(__FUNCTION_NAME);
+       
+       std::ostringstream os(std::ios_base::binary);
+       u8 buf[12];
+       
+       // Write command
+       writeU16(buf, TOCLIENT_CHAT_MESSAGE);
+       os.write((char*)buf, 2);
+       
+       // Write length
+       writeU16(buf, message.size());
+       os.write((char*)buf, 2);
+       
+       // Write string
+       for(u32 i=0; i<message.size(); i++)
+       {
+               u16 w = message[i];
+               writeU16(buf, w);
+               os.write((char*)buf, 2);
+       }
+       
+       // Make data buffer
+       std::string s = os.str();
+       SharedBuffer<u8> data((u8*)s.c_str(), s.size());
        // Send as reliable
        m_con.Send(peer_id, 0, data, true);
 }
 
+void Server::BroadcastChatMessage(const std::wstring &message)
+{
+       for(core::map<u16, RemoteClient*>::Iterator
+               i = m_clients.getIterator();
+               i.atEnd() == false; i++)
+       {
+               // Get client and check that it is valid
+               RemoteClient *client = i.getNode()->getValue();
+               assert(client->peer_id == i.getNode()->getKey());
+               if(client->serialization_version == SER_FMT_VER_INVALID)
+                       continue;
+
+               SendChatMessage(client->peer_id, message);
+       }
+}
+
 void Server::SendBlocks(float dtime)
 {
        DSTACK(__FUNCTION_NAME);
@@ -2241,6 +3102,258 @@ RemoteClient* Server::getClient(u16 peer_id)
        return n->getValue();
 }
 
+void setCreativeInventory(Player *player)
+{
+       player->resetInventory();
+       
+       // Give some good picks
+       {
+               InventoryItem *item = new ToolItem("STPick", 0);
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+       {
+               InventoryItem *item = new ToolItem("MesePick", 0);
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+
+       /*
+               Give materials
+       */
+       assert(USEFUL_CONTENT_COUNT <= PLAYER_INVENTORY_SIZE);
+       
+       // add torch first
+       InventoryItem *item = new MaterialItem(CONTENT_TORCH, 1);
+       player->inventory.addItem("main", item);
+       
+       // Then others
+       for(u16 i=0; i<USEFUL_CONTENT_COUNT; i++)
+       {
+               // Skip some materials
+               if(i == CONTENT_WATER || i == CONTENT_TORCH
+                       || i == CONTENT_COALSTONE)
+                       continue;
+
+               InventoryItem *item = new MaterialItem(i, 1);
+               player->inventory.addItem("main", item);
+       }
+       // Sign
+       {
+               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+}
+
+Player *Server::emergePlayer(const char *name, const char *password,
+               u16 peer_id)
+{
+       /*
+               Try to get an existing player
+       */
+       Player *player = m_env.getPlayer(name);
+       if(player != NULL)
+       {
+               // If player is already connected, cancel
+               if(player->peer_id != 0)
+               {
+                       dstream<<"emergePlayer(): Player already connected"<<std::endl;
+                       return NULL;
+               }
+
+               // Got one.
+               player->peer_id = peer_id;
+               
+               // Reset inventory to creative if in creative mode
+               if(g_settings.getBool("creative_mode"))
+               {
+                       setCreativeInventory(player);
+               }
+
+               return player;
+       }
+
+       /*
+               If player with the wanted peer_id already exists, cancel.
+       */
+       if(m_env.getPlayer(peer_id) != NULL)
+       {
+               dstream<<"emergePlayer(): Player with wrong name but same"
+                               " peer_id already exists"<<std::endl;
+               return NULL;
+       }
+       
+       /*
+               Create a new player
+       */
+       {
+               player = new ServerRemotePlayer();
+               //player->peer_id = c.peer_id;
+               //player->peer_id = PEER_ID_INEXISTENT;
+               player->peer_id = peer_id;
+               player->updateName(name);
+
+               /*
+                       Set player position
+               */
+               
+               dstream<<"Server: Finding spawn place for player \""
+                               <<player->getName()<<"\""<<std::endl;
+
+               v2s16 nodepos;
+#if 1
+               player->setPosition(intToFloat(v3s16(
+                               0,
+                               45, //64,
+                               0
+               )));
+#endif
+#if 0
+               f32 groundheight = 0;
+#if 0
+               // Try to find a good place a few times
+               for(s32 i=0; i<500; i++)
+               {
+                       s32 range = 1 + i;
+                       // We're going to try to throw the player to this position
+                       nodepos = v2s16(-range + (myrand()%(range*2)),
+                                       -range + (myrand()%(range*2)));
+                       v2s16 sectorpos = getNodeSectorPos(nodepos);
+                       // Get sector
+                       m_env.getMap().emergeSector(sectorpos);
+                       // Get ground height at point
+                       groundheight = m_env.getMap().getGroundHeight(nodepos, true);
+                       // The sector should have been generated -> groundheight exists
+                       assert(groundheight > GROUNDHEIGHT_VALID_MINVALUE);
+                       // Don't go underwater
+                       if(groundheight < WATER_LEVEL)
+                       {
+                               //dstream<<"-> Underwater"<<std::endl;
+                               continue;
+                       }
+#if 0 // Doesn't work, generating blocks is a bit too complicated for doing here
+                       // Get block at point
+                       v3s16 nodepos3d;
+                       nodepos3d = v3s16(nodepos.X, groundheight+1, nodepos.Y);
+                       v3s16 blockpos = getNodeBlockPos(nodepos3d);
+                       ((ServerMap*)(&m_env.getMap()))->emergeBlock(blockpos);
+                       // Don't go inside ground
+                       try{
+                               /*v3s16 footpos(nodepos.X, groundheight+1, nodepos.Y);
+                               v3s16 headpos(nodepos.X, groundheight+2, nodepos.Y);*/
+                               v3s16 footpos = nodepos3d + v3s16(0,0,0);
+                               v3s16 headpos = nodepos3d + v3s16(0,1,0);
+                               if(m_env.getMap().getNode(footpos).d != CONTENT_AIR
+                                       || m_env.getMap().getNode(headpos).d != CONTENT_AIR)
+                               {
+                                       dstream<<"-> Inside ground"<<std::endl;
+                                       // In ground
+                                       continue;
+                               }
+                       }catch(InvalidPositionException &e)
+                       {
+                               dstream<<"-> Invalid position"<<std::endl;
+                               // Ignore invalid position
+                               continue;
+                       }
+#endif
+                       // Found a good place
+                       dstream<<"Searched through "<<i<<" places."<<std::endl;
+                       break;
+               }
+#endif
+               
+               // If no suitable place was not found, go above water at least.
+               if(groundheight < WATER_LEVEL)
+                       groundheight = WATER_LEVEL;
+
+               player->setPosition(intToFloat(v3s16(
+                               nodepos.X,
+                               //groundheight + 1,
+                               groundheight + 15,
+                               nodepos.Y
+               )));
+#endif
+
+               /*
+                       Add player to environment
+               */
+
+               m_env.addPlayer(player);
+
+               /*
+                       Add stuff to inventory
+               */
+               
+               if(g_settings.getBool("creative_mode"))
+               {
+                       setCreativeInventory(player);
+               }
+               else
+               {
+                       /*{
+                               InventoryItem *item = new ToolItem("WPick", 32000);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }*/
+                       /*{
+                               InventoryItem *item = new MaterialItem(CONTENT_MESE, 6);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }
+                       {
+                               InventoryItem *item = new MaterialItem(CONTENT_COALSTONE, 6);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }
+                       {
+                               InventoryItem *item = new MaterialItem(CONTENT_WOOD, 6);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }
+                       {
+                               InventoryItem *item = new CraftItem("Stick", 4);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }
+                       {
+                               InventoryItem *item = new ToolItem("WPick", 32000);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }
+                       {
+                               InventoryItem *item = new ToolItem("STPick", 32000);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }*/
+                       /*// Give some lights
+                       {
+                               InventoryItem *item = new MaterialItem(CONTENT_TORCH, 999);
+                               bool r = player->inventory.addItem("main", item);
+                               assert(r == true);
+                       }
+                       // and some signs
+                       for(u16 i=0; i<4; i++)
+                       {
+                               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
+                               bool r = player->inventory.addItem("main", item);
+                               assert(r == true);
+                       }*/
+                       /*// Give some other stuff
+                       {
+                               InventoryItem *item = new MaterialItem(CONTENT_TREE, 999);
+                               bool r = player->inventory.addItem("main", item);
+                               assert(r == true);
+                       }*/
+               }
+
+               return player;
+               
+       } // create new player
+}
+
+#if 0
 void Server::UpdateBlockWaterPressure(MapBlock *block,
                        core::map<v3s16, MapBlock*> &modified_blocks)
 {
@@ -2262,6 +3375,139 @@ void Server::UpdateBlockWaterPressure(MapBlock *block,
        
        v.blitBack(modified_blocks);
 }
+#endif
+
+void Server::handlePeerChange(PeerChange &c)
+{
+       JMutexAutoLock envlock(m_env_mutex);
+       JMutexAutoLock conlock(m_con_mutex);
        
+       if(c.type == PEER_ADDED)
+       {
+               /*
+                       Add
+               */
+
+               // Error check
+               core::map<u16, RemoteClient*>::Node *n;
+               n = m_clients.find(c.peer_id);
+               // The client shouldn't already exist
+               assert(n == NULL);
+
+               // Create client
+               RemoteClient *client = new RemoteClient();
+               client->peer_id = c.peer_id;
+               m_clients.insert(client->peer_id, client);
+
+       } // PEER_ADDED
+       else if(c.type == PEER_REMOVED)
+       {
+               /*
+                       Delete
+               */
+
+               // Error check
+               core::map<u16, RemoteClient*>::Node *n;
+               n = m_clients.find(c.peer_id);
+               // The client should exist
+               assert(n != NULL);
+               
+               // Collect information about leaving in chat
+               std::wstring message;
+               {
+                       std::wstring name = L"unknown";
+                       Player *player = m_env.getPlayer(c.peer_id);
+                       if(player != NULL)
+                               name = narrow_to_wide(player->getName());
+                       
+                       message += L"*** ";
+                       message += name;
+                       message += L" left game";
+                       if(c.timeout)
+                               message += L" (timed out)";
+               }
+
+               /*// Delete player
+               {
+                       m_env.removePlayer(c.peer_id);
+               }*/
+
+               // Set player client disconnected
+               {
+                       Player *player = m_env.getPlayer(c.peer_id);
+                       if(player != NULL)
+                               player->peer_id = 0;
+               }
+               
+               // Delete client
+               delete m_clients[c.peer_id];
+               m_clients.remove(c.peer_id);
+
+               // Send player info to all remaining clients
+               SendPlayerInfos();
+               
+               // Send leave chat message to all remaining clients
+               BroadcastChatMessage(message);
+               
+       } // PEER_REMOVED
+       else
+       {
+               assert(0);
+       }
+}
+
+void Server::handlePeerChanges()
+{
+       while(m_peer_change_queue.size() > 0)
+       {
+               PeerChange c = m_peer_change_queue.pop_front();
+
+               dout_server<<"Server: Handling peer change: "
+                               <<"id="<<c.peer_id<<", timeout="<<c.timeout
+                               <<std::endl;
+
+               handlePeerChange(c);
+       }
+}
+
+void dedicated_server_loop(Server &server)
+{
+       DSTACK(__FUNCTION_NAME);
+       
+       std::cout<<std::endl;
+       std::cout<<"========================"<<std::endl;
+       std::cout<<"Running dedicated server"<<std::endl;
+       std::cout<<"========================"<<std::endl;
+       std::cout<<std::endl;
+
+       for(;;)
+       {
+               // This is kind of a hack but can be done like this
+               // because server.step() is very light
+               sleep_ms(30);
+               server.step(0.030);
+
+               static int counter = 0;
+               counter--;
+               if(counter <= 0)
+               {
+                       counter = 10;
+
+                       core::list<PlayerInfo> list = server.getPlayerInfo();
+                       core::list<PlayerInfo>::Iterator i;
+                       static u32 sum_old = 0;
+                       u32 sum = PIChecksum(list);
+                       if(sum != sum_old)
+                       {
+                               std::cout<<DTIME<<"Player info:"<<std::endl;
+                               for(i=list.begin(); i!=list.end(); i++)
+                               {
+                                       i->PrintLine(&std::cout);
+                               }
+                       }
+                       sum_old = sum;
+               }
+       }
+}