]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - src/server.cpp
GameUI refactor (part 1/X): GameUI object creation + GameUIFlags move to GameUI
[dragonfireclient.git] / src / server.cpp
index 6889451d9f623ddf2f4ff946cec0719e84d7e1a1..26b3bb4b164eb35d052d4c86b7798993823cd147 100644 (file)
@@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <iostream>
 #include <queue>
 #include <algorithm>
+#include "network/connection.h"
 #include "network/networkprotocol.h"
 #include "network/serveropcodes.h"
 #include "ban.h"
@@ -43,14 +44,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "itemdef.h"
 #include "craftdef.h"
 #include "emerge.h"
-#include "mapgen.h"
-#include "mg_biome.h"
+#include "mapgen/mapgen.h"
+#include "mapgen/mg_biome.h"
 #include "content_mapnode.h"
 #include "content_nodemeta.h"
-#include "content_abm.h"
 #include "content_sao.h"
 #include "mods.h"
 #include "event_manager.h"
+#include "modchannels.h"
 #include "serverlist.h"
 #include "util/string.h"
 #include "rollback.h"
@@ -60,7 +61,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/base64.h"
 #include "util/sha1.h"
 #include "util/hex.h"
-#include "database.h"
+#include "database/database.h"
+#include "chatmessage.h"
+#include "chat_interface.h"
+#include "remoteplayer.h"
 
 class ClientNotFoundException : public BaseException
 {
@@ -87,15 +91,12 @@ class ServerThread : public Thread
 
 void *ServerThread::run()
 {
-       DSTACK(FUNCTION_NAME);
        BEGIN_DEBUG_EXCEPTION_HANDLER
 
        m_server->AsyncRunStep(true);
 
        while (!stopRequested()) {
                try {
-                       //TimeTaker timer("AsyncRunStep() + Receive()");
-
                        m_server->AsyncRunStep();
 
                        m_server->Receive();
@@ -114,7 +115,7 @@ void *ServerThread::run()
 
        END_DEBUG_EXCEPTION_HANDLER
 
-       return NULL;
+       return nullptr;
 }
 
 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
@@ -148,53 +149,33 @@ Server::Server(
                const std::string &path_world,
                const SubgameSpec &gamespec,
                bool simple_singleplayer_mode,
-               bool ipv6,
+               Address bind_addr,
                bool dedicated,
                ChatInterface *iface
        ):
+       m_bind_addr(bind_addr),
        m_path_world(path_world),
        m_gamespec(gamespec),
        m_simple_singleplayer_mode(simple_singleplayer_mode),
        m_dedicated(dedicated),
        m_async_fatal_error(""),
-       m_env(NULL),
-       m_con(PROTOCOL_ID,
+       m_con(std::make_shared<con::Connection>(PROTOCOL_ID,
                        512,
                        CONNECTION_TIMEOUT,
-                       ipv6,
-                       this),
-       m_banmanager(NULL),
-       m_rollback(NULL),
-       m_enable_rollback_recording(false),
-       m_emerge(NULL),
-       m_script(NULL),
+                       m_bind_addr.isIPv6(),
+                       this)),
        m_itemdef(createItemDefManager()),
        m_nodedef(createNodeDefManager()),
        m_craftdef(createCraftDefManager()),
        m_event(new EventManager()),
-       m_thread(NULL),
-       m_time_of_day_send_timer(0),
        m_uptime(0),
-       m_clients(&m_con),
-       m_shutdown_requested(false),
-       m_shutdown_ask_reconnect(false),
-       m_shutdown_timer(0.0f),
+       m_clients(m_con),
        m_admin_chat(iface),
-       m_ignore_map_edit_events(false),
-       m_ignore_map_edit_events_peer_id(0),
-       m_next_sound_id(0),
-       m_mod_storage_save_timer(10.0f)
-{
-       m_liquid_transform_timer = 0.0;
-       m_liquid_transform_every = 1.0;
-       m_masterserver_timer = 0.0;
-       m_emergethread_trigger_timer = 0.0;
-       m_savemap_timer = 0.0;
-
-       m_step_dtime = 0.0;
+       m_modchannel_mgr(new ModChannelMgr())
+{
        m_lag = g_settings->getFloat("dedicated_server_step");
 
-       if(path_world == "")
+       if (path_world.empty())
                throw ServerError("Supplied empty world path");
 
        if(!gamespec.isValid())
@@ -230,32 +211,6 @@ Server::Server(
                modconf.printUnsatisfiedModsError();
        }
 
-       Settings worldmt_settings;
-       std::string worldmt = m_path_world + DIR_DELIM + "world.mt";
-       worldmt_settings.readConfigFile(worldmt.c_str());
-       std::vector<std::string> names = worldmt_settings.getNames();
-       std::set<std::string> load_mod_names;
-       for(std::vector<std::string>::iterator it = names.begin();
-               it != names.end(); ++it) {
-               std::string name = *it;
-               if(name.compare(0,9,"load_mod_")==0 && worldmt_settings.getBool(name))
-                       load_mod_names.insert(name.substr(9));
-       }
-       // complain about mods declared to be loaded, but not found
-       for(std::vector<ModSpec>::iterator it = m_mods.begin();
-                       it != m_mods.end(); ++it)
-               load_mod_names.erase((*it).name);
-       for(std::vector<ModSpec>::iterator it = unsatisfied_mods.begin();
-                       it != unsatisfied_mods.end(); ++it)
-               load_mod_names.erase((*it).name);
-       if(!load_mod_names.empty()) {
-               errorstream << "The following mods could not be found:";
-               for(std::set<std::string>::iterator it = load_mod_names.begin();
-                       it != load_mod_names.end(); ++it)
-                       errorstream << " \"" << (*it) << "\"";
-               errorstream << std::endl;
-       }
-
        //lock environment
        MutexAutoLock envlock(m_env_mutex);
 
@@ -298,9 +253,8 @@ Server::Server(
        m_nodedef->updateAliases(m_itemdef);
 
        // Apply texture overrides from texturepack/override.txt
-       std::string texture_path = g_settings->get("texture_path");
-       if (texture_path != "" && fs::IsDir(texture_path))
-               m_nodedef->applyTextureOverrides(texture_path + DIR_DELIM + "override.txt");
+       for (const auto &path : fs::GetRecursiveDirs(g_settings->get("texture_path")))
+               m_nodedef->applyTextureOverrides(path + DIR_DELIM + "override.txt");
 
        m_nodedef->setNodeRegistrationStatus(true);
 
@@ -344,26 +298,23 @@ Server::Server(
                m_env->loadDefaultMeta();
        }
 
-       // Add some test ActiveBlockModifiers to environment
-       add_legacy_abms(m_env, m_nodedef);
-
        m_liquid_transform_every = g_settings->getFloat("liquid_update");
        m_max_chatmessage_length = g_settings->getU16("chat_message_max_size");
+       m_csm_flavour_limits = g_settings->getU64("csm_flavour_limits");
+       m_csm_noderange_limit = g_settings->getU32("csm_flavour_noderange_limit");
 }
 
 Server::~Server()
 {
-       infostream<<"Server destructing"<<std::endl;
+       infostream << "Server destructing" << std::endl;
 
        // Send shutdown message
-       SendChatMessage(PEER_ID_INEXISTENT, L"*** Server shutting down");
+       SendChatMessage(PEER_ID_INEXISTENT, ChatMessage(CHATMESSAGE_TYPE_ANNOUNCE,
+                       L"*** Server shutting down"));
 
        {
                MutexAutoLock envlock(m_env_mutex);
-
-               // Execute script shutdown hooks
-               m_script->on_shutdown();
-
+               
                infostream << "Server: Saving players" << std::endl;
                m_env->saveLoadedPlayers();
 
@@ -374,11 +325,25 @@ Server::~Server()
                        reconnect = m_shutdown_ask_reconnect;
                        kick_msg = m_shutdown_msg;
                }
-               if (kick_msg == "") {
+               if (kick_msg.empty()) {
                        kick_msg = g_settings->get("kick_msg_shutdown");
                }
                m_env->kickAllPlayers(SERVER_ACCESSDENIED_SHUTDOWN,
                        kick_msg, reconnect);
+       }
+
+       // Do this before stopping the server in case mapgen callbacks need to access
+       // server-controlled resources (like ModStorages). Also do them before
+       // shutdown callbacks since they may modify state that is finalized in a
+       // callback.
+       m_emerge->stopThreads();
+
+       {
+               MutexAutoLock envlock(m_env_mutex);
+
+               // Execute script shutdown hooks
+               infostream << "Executing shutdown hooks" << std::endl;
+               m_script->on_shutdown();
 
                infostream << "Server: Saving environment metadata" << std::endl;
                m_env->saveMeta();
@@ -388,10 +353,6 @@ Server::~Server()
        stop();
        delete m_thread;
 
-       // stop all emerge threads before deleting players that may have
-       // requested blocks to be emerged
-       m_emerge->stopThreads();
-
        // Delete things in the reverse order of creation
        delete m_emerge;
        delete m_env;
@@ -403,54 +364,46 @@ Server::~Server()
        delete m_craftdef;
 
        // Deinitialize scripting
-       infostream<<"Server: Deinitializing scripting"<<std::endl;
+       infostream << "Server: Deinitializing scripting" << std::endl;
        delete m_script;
 
        // Delete detached inventories
-       for (std::map<std::string, Inventory*>::iterator
-                       i = m_detached_inventories.begin();
-                       i != m_detached_inventories.end(); ++i) {
-               delete i->second;
+       for (auto &detached_inventory : m_detached_inventories) {
+               delete detached_inventory.second;
        }
 }
 
-void Server::start(Address bind_addr)
+void Server::start()
 {
-       DSTACK(FUNCTION_NAME);
-
-       m_bind_addr = bind_addr;
-
-       infostream<<"Starting server on "
-                       << bind_addr.serializeString() <<"..."<<std::endl;
+       infostream << "Starting server on " << m_bind_addr.serializeString()
+                       << "..." << std::endl;
 
        // Stop thread if already running
        m_thread->stop();
 
        // Initialize connection
-       m_con.SetTimeoutMs(30);
-       m_con.Serve(bind_addr);
+       m_con->SetTimeoutMs(30);
+       m_con->Serve(m_bind_addr);
 
        // Start thread
        m_thread->start();
 
        // ASCII art for the win!
        actionstream
-       <<"        .__               __                   __   "<<std::endl
-       <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
-       <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
-       <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
-       <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
-       <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
-       actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
-       actionstream<<"Server for gameid=\""<<m_gamespec.id
-                       <<"\" listening on "<<bind_addr.serializeString()<<":"
-                       <<bind_addr.getPort() << "."<<std::endl;
+               << "        .__               __                   __   " << std::endl
+               << "  _____ |__| ____   _____/  |_  ____   _______/  |_ " << std::endl
+               << " /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\" << std::endl
+               << "|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  " << std::endl
+               << "|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  " << std::endl
+               << "      \\/        \\/     \\/          \\/     \\/        " << std::endl;
+       actionstream << "World at [" << m_path_world << "]" << std::endl;
+       actionstream << "Server for gameid=\"" << m_gamespec.id
+                       << "\" listening on " << m_bind_addr.serializeString() << ":"
+                       << m_bind_addr.getPort() << "." << std::endl;
 }
 
 void Server::stop()
 {
-       DSTACK(FUNCTION_NAME);
-
        infostream<<"Server: Stopping and waiting threads"<<std::endl;
 
        // Stop threads (set run=false first so both start stopping)
@@ -464,7 +417,6 @@ void Server::stop()
 
 void Server::step(float dtime)
 {
-       DSTACK(FUNCTION_NAME);
        // Limit a bit
        if (dtime > 2.0)
                dtime = 2.0;
@@ -486,8 +438,6 @@ void Server::step(float dtime)
 
 void Server::AsyncRunStep(bool initial_step)
 {
-       DSTACK(FUNCTION_NAME);
-
        g_profiler->add("Server::AsyncRunStep (num)", 1);
 
        float dtime;
@@ -501,7 +451,7 @@ void Server::AsyncRunStep(bool initial_step)
                SendBlocks(dtime);
        }
 
-       if((dtime < 0.001) && (initial_step == false))
+       if((dtime < 0.001) && !initial_step)
                return;
 
        g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
@@ -601,23 +551,7 @@ void Server::AsyncRunStep(bool initial_step)
 
                std::map<v3s16, MapBlock*> modified_blocks;
                m_env->getMap().transformLiquids(modified_blocks, m_env);
-#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++)
-               {
-                       MapBlock *block = i.getNode()->getValue();
-                       modified_blocks.insert(block->getPos(), block);
-               }
-#endif
+
                /*
                        Set the modified blocks unsent for all the clients
                */
@@ -660,25 +594,25 @@ void Server::AsyncRunStep(bool initial_step)
                MutexAutoLock envlock(m_env_mutex);
 
                m_clients.lock();
-               UNORDERED_MAP<u16, RemoteClient*> clients = m_clients.getClientList();
+               const RemoteClientMap &clients = m_clients.getClientList();
                ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
 
                // Radius inside which objects are active
-               static const s16 radius =
+               static thread_local const s16 radius =
                        g_settings->getS16("active_object_send_range_blocks") * MAP_BLOCKSIZE;
 
                // Radius inside which players are active
-               static const bool is_transfer_limited =
+               static thread_local const bool is_transfer_limited =
                        g_settings->exists("unlimited_player_transfer_distance") &&
                        !g_settings->getBool("unlimited_player_transfer_distance");
-               static const s16 player_transfer_dist = g_settings->getS16("player_transfer_distance") * MAP_BLOCKSIZE;
+               static thread_local const s16 player_transfer_dist =
+                       g_settings->getS16("player_transfer_distance") * MAP_BLOCKSIZE;
                s16 player_radius = player_transfer_dist;
                if (player_radius == 0 && is_transfer_limited)
                        player_radius = radius;
 
-               for (UNORDERED_MAP<u16, RemoteClient*>::iterator i = clients.begin();
-                       i != clients.end(); ++i) {
-                       RemoteClient *client = i->second;
+               for (const auto &client_it : clients) {
+                       RemoteClient *client = client_it.second;
 
                        // If definitions and textures have not been sent, don't
                        // send objects either
@@ -686,16 +620,13 @@ void Server::AsyncRunStep(bool initial_step)
                                continue;
 
                        RemotePlayer *player = m_env->getPlayer(client->peer_id);
-                       if (player == NULL) {
+                       if (!player) {
                                // This can happen if the client timeouts somehow
-                               /*warningstream<<FUNCTION_NAME<<": Client "
-                                               <<client->peer_id
-                                               <<" has no associated player"<<std::endl;*/
                                continue;
                        }
 
                        PlayerSAO *playersao = player->getPlayerSAO();
-                       if (playersao == NULL)
+                       if (!playersao)
                                continue;
 
                        s16 my_radius = MYMIN(radius, playersao->getWantedRange() * MAP_BLOCKSIZE);
@@ -748,9 +679,8 @@ void Server::AsyncRunStep(bool initial_step)
 
                                // Get object type
                                u8 type = ACTIVEOBJECT_TYPE_INVALID;
-                               if(obj == NULL)
-                                       warningstream<<FUNCTION_NAME
-                                                       <<": NULL object"<<std::endl;
+                               if (!obj)
+                                       warningstream << FUNCTION_NAME << ": NULL object" << std::endl;
                                else
                                        type = obj->getSendType();
 
@@ -787,7 +717,7 @@ void Server::AsyncRunStep(bool initial_step)
                if (m_mod_storage_save_timer <= 0.0f) {
                        infostream << "Saving registered mod storages." << std::endl;
                        m_mod_storage_save_timer = g_settings->getFloat("server_map_save_interval");
-                       for (UNORDERED_MAP<std::string, ModMetadata *>::const_iterator
+                       for (std::unordered_map<std::string, ModMetadata *>::const_iterator
                                it = m_mod_storages.begin(); it != m_mod_storages.end(); ++it) {
                                if (it->second->isModified()) {
                                        it->second->save(getModStoragePath());
@@ -805,7 +735,7 @@ void Server::AsyncRunStep(bool initial_step)
 
                // Key = object id
                // Value = data sent by object
-               UNORDERED_MAP<u16, std::vector<ActiveObjectMessage>* > buffered_messages;
+               std::unordered_map<u16, std::vector<ActiveObjectMessage>*> buffered_messages;
 
                // Get active object messages from environment
                for(;;) {
@@ -813,8 +743,8 @@ void Server::AsyncRunStep(bool initial_step)
                        if (aom.id == 0)
                                break;
 
-                       std::vector<ActiveObjectMessage>* message_list = NULL;
-                       UNORDERED_MAP<u16, std::vector<ActiveObjectMessage>* >::iterator n;
+                       std::vector<ActiveObjectMessage>* message_list = nullptr;
+                       std::unordered_map<u16, std::vector<ActiveObjectMessage>* >::iterator n;
                        n = buffered_messages.find(aom.id);
                        if (n == buffered_messages.end()) {
                                message_list = new std::vector<ActiveObjectMessage>;
@@ -827,29 +757,24 @@ void Server::AsyncRunStep(bool initial_step)
                }
 
                m_clients.lock();
-               UNORDERED_MAP<u16, RemoteClient*> clients = m_clients.getClientList();
+               const RemoteClientMap &clients = m_clients.getClientList();
                // Route data to every client
-               for (UNORDERED_MAP<u16, RemoteClient*>::iterator i = clients.begin();
-                       i != clients.end(); ++i) {
-                       RemoteClient *client = i->second;
+               for (const auto &client_it : clients) {
+                       RemoteClient *client = client_it.second;
                        std::string reliable_data;
                        std::string unreliable_data;
                        // Go through all objects in message buffer
-                       for (UNORDERED_MAP<u16, std::vector<ActiveObjectMessage>* >::iterator
-                                       j = buffered_messages.begin();
-                                       j != buffered_messages.end(); ++j) {
+                       for (const auto &buffered_message : buffered_messages) {
                                // If object is not known by client, skip it
-                               u16 id = j->first;
+                               u16 id = buffered_message.first;
                                if (client->m_known_objects.find(id) == client->m_known_objects.end())
                                        continue;
 
                                // Get message list of object
-                               std::vector<ActiveObjectMessage>* list = j->second;
+                               std::vector<ActiveObjectMessage>* list = buffered_message.second;
                                // Go through every message
-                               for (std::vector<ActiveObjectMessage>::iterator
-                                               k = list->begin(); k != list->end(); ++k) {
+                               for (const ActiveObjectMessage &aom : *list) {
                                        // Compose the full new data with header
-                                       ActiveObjectMessage aom = *k;
                                        std::string new_data;
                                        // Add object id
                                        char buf[2];
@@ -858,7 +783,7 @@ void Server::AsyncRunStep(bool initial_step)
                                        // Add data
                                        new_data += serializeString(aom.datastring);
                                        // Add data to buffer
-                                       if(aom.reliable)
+                                       if (aom.reliable)
                                                reliable_data += new_data;
                                        else
                                                unreliable_data += new_data;
@@ -868,21 +793,19 @@ void Server::AsyncRunStep(bool initial_step)
                                reliable_data and unreliable_data are now ready.
                                Send them.
                        */
-                       if(reliable_data.size() > 0) {
+                       if (!reliable_data.empty()) {
                                SendActiveObjectMessages(client->peer_id, reliable_data);
                        }
 
-                       if(unreliable_data.size() > 0) {
+                       if (!unreliable_data.empty()) {
                                SendActiveObjectMessages(client->peer_id, unreliable_data, false);
                        }
                }
                m_clients.unlock();
 
                // Clear buffered_messages
-               for (UNORDERED_MAP<u16, std::vector<ActiveObjectMessage>* >::iterator
-                               i = buffered_messages.begin();
-                               i != buffered_messages.end(); ++i) {
-                       delete i->second;
+               for (auto &buffered_message : buffered_messages) {
+                       delete buffered_message.second;
                }
        }
 
@@ -906,8 +829,7 @@ void Server::AsyncRunStep(bool initial_step)
                // We'll log the amount of each
                Profiler prof;
 
-               while(m_unsent_map_edit_queue.size() != 0)
-               {
+               while (!m_unsent_map_edit_queue.empty()) {
                        MapEditEvent* event = m_unsent_map_edit_queue.front();
                        m_unsent_map_edit_queue.pop();
 
@@ -937,10 +859,8 @@ void Server::AsyncRunStep(bool initial_step)
                        case MEET_OTHER:
                                infostream << "Server: MEET_OTHER" << std::endl;
                                prof.add("MEET_OTHER", 1);
-                               for(std::set<v3s16>::iterator
-                                               i = event->modified_blocks.begin();
-                                               i != event->modified_blocks.end(); ++i) {
-                                       setBlockNotSent(*i);
+                               for (const v3s16 &modified_block : event->modified_blocks) {
+                                       setBlockNotSent(modified_block);
                                }
                                break;
                        default:
@@ -953,38 +873,29 @@ void Server::AsyncRunStep(bool initial_step)
                        /*
                                Set blocks not sent to far players
                        */
-                       if(!far_players.empty()) {
+                       if (!far_players.empty()) {
                                // Convert list format to that wanted by SetBlocksNotSent
                                std::map<v3s16, MapBlock*> modified_blocks2;
-                               for(std::set<v3s16>::iterator
-                                               i = event->modified_blocks.begin();
-                                               i != event->modified_blocks.end(); ++i) {
-                                       modified_blocks2[*i] =
-                                                       m_env->getMap().getBlockNoCreateNoEx(*i);
+                               for (const v3s16 &modified_block : event->modified_blocks) {
+                                       modified_blocks2[modified_block] =
+                                                       m_env->getMap().getBlockNoCreateNoEx(modified_block);
                                }
 
                                // Set blocks not sent
-                               for(std::vector<u16>::iterator
-                                               i = far_players.begin();
-                                               i != far_players.end(); ++i) {
-                                       if(RemoteClient *client = getClient(*i))
+                               for (const u16 far_player : far_players) {
+                                       if (RemoteClient *client = getClient(far_player))
                                                client->SetBlocksNotSent(modified_blocks2);
                                }
                        }
 
                        delete event;
-
-                       /*// Don't send too many at a time
-                       count++;
-                       if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
-                               break;*/
                }
 
-               if(event_count >= 5){
-                       infostream<<"Server: MapEditEvents:"<<std::endl;
+               if (event_count >= 5) {
+                       infostream << "Server: MapEditEvents:" << std::endl;
                        prof.print(infostream);
-               } else if(event_count != 0){
-                       verbosestream<<"Server: MapEditEvents:"<<std::endl;
+               } else if (event_count != 0) {
+                       verbosestream << "Server: MapEditEvents:" << std::endl;
                        prof.print(verbosestream);
                }
 
@@ -1008,7 +919,7 @@ void Server::AsyncRunStep(bool initial_step)
        {
                float &counter = m_savemap_timer;
                counter += dtime;
-               static const float save_interval =
+               static thread_local const float save_interval =
                        g_settings->getFloat("server_map_save_interval");
                if (counter >= save_interval) {
                        counter = 0.0;
@@ -1068,43 +979,35 @@ void Server::AsyncRunStep(bool initial_step)
 
 void Server::Receive()
 {
-       DSTACK(FUNCTION_NAME);
-       SharedBuffer<u8> data;
-       u16 peer_id;
+       session_t peer_id;
        try {
                NetworkPacket pkt;
-               m_con.Receive(&pkt);
+               m_con->Receive(&pkt);
                peer_id = pkt.getPeerId();
                ProcessData(&pkt);
-       }
-       catch(con::InvalidIncomingDataException &e) {
-               infostream<<"Server::Receive(): "
-                               "InvalidIncomingDataException: what()="
-                               <<e.what()<<std::endl;
-       }
-       catch(SerializationError &e) {
-               infostream<<"Server::Receive(): "
-                               "SerializationError: what()="
-                               <<e.what()<<std::endl;
-       }
-       catch(ClientStateError &e) {
-               errorstream << "ProcessData: peer=" << peer_id  << e.what() << std::endl;
+       } catch (const con::InvalidIncomingDataException &e) {
+               infostream << "Server::Receive(): InvalidIncomingDataException: what()="
+                               << e.what() << std::endl;
+       } catch (const SerializationError &e) {
+               infostream << "Server::Receive(): SerializationError: what()="
+                               << e.what() << std::endl;
+       } catch (const ClientStateError &e) {
+               errorstream << "ProcessData: peer=" << peer_id << e.what() << std::endl;
                DenyAccess_Legacy(peer_id, L"Your client sent something server didn't expect."
                                L"Try reconnecting or updating your client");
-       }
-       catch(con::PeerNotFoundException &e) {
+       } catch (const con::PeerNotFoundException &e) {
                // Do nothing
        }
 }
 
-PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
+PlayerSAO* Server::StageTwoClientInit(session_t peer_id)
 {
-       std::string playername = "";
+       std::string playername;
        PlayerSAO *playersao = NULL;
        m_clients.lock();
        try {
                RemoteClient* client = m_clients.lockedGetClientNoEx(peer_id, CS_InitDone);
-               if (client != NULL) {
+               if (client) {
                        playername = client->getName();
                        playersao = emergePlayer(playername.c_str(), peer_id, client->net_proto_version);
                }
@@ -1117,8 +1020,8 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
        RemotePlayer *player = m_env->getPlayer(playername.c_str());
 
        // If failed, cancel
-       if ((playersao == NULL) || (player == NULL)) {
-               if (player && player->peer_id != 0) {
+       if (!playersao || !player) {
+               if (player && player->getPeerId() != PEER_ID_INEXISTENT) {
                        actionstream << "Server: Failed to emerge player \"" << playername
                                        << "\" (player allocated to an another client)" << std::endl;
                        DenyAccess_Legacy(peer_id, L"Another client is connected with this "
@@ -1158,9 +1061,9 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
        // Note things in chat if not in simple singleplayer mode
        if (!m_simple_singleplayer_mode && g_settings->getBool("show_statusline_on_connect")) {
                // Send information about server to player in chat
-               SendChatMessage(peer_id, getStatusString());
+               SendChatMessage(peer_id, ChatMessage(CHATMESSAGE_TYPE_SYSTEM, getStatusString()));
        }
-       Address addr = getPeerAddress(player->peer_id);
+       Address addr = getPeerAddress(player->getPeerId());
        std::string ip_str = addr.serializeString();
        actionstream<<player->getName() <<" [" << ip_str << "] joins game. " << std::endl;
        /*
@@ -1171,9 +1074,8 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
 
                actionstream << player->getName() << " joins game. List of players: ";
 
-               for (std::vector<std::string>::const_iterator i = names.begin();
-                               i != names.end(); ++i) {
-                       actionstream << *i << " ";
+               for (const std::string &name : names) {
+                       actionstream << name << " ";
                }
 
                actionstream << player->getName() <<std::endl;
@@ -1189,7 +1091,6 @@ inline void Server::handleCommand(NetworkPacket* pkt)
 
 void Server::ProcessData(NetworkPacket *pkt)
 {
-       DSTACK(FUNCTION_NAME);
        // Environment is locked first.
        MutexAutoLock envlock(m_env_mutex);
 
@@ -1298,7 +1199,7 @@ Inventory* Server::getInventory(const InventoryLocation &loc)
                break;
        case InventoryLocation::PLAYER:
        {
-               RemotePlayer *player = dynamic_cast<RemotePlayer *>(m_env->getPlayer(loc.name.c_str()));
+               RemotePlayer *player = m_env->getPlayer(loc.name.c_str());
                if(!player)
                        return NULL;
                PlayerSAO *playersao = player->getPlayerSAO();
@@ -1338,8 +1239,7 @@ void Server::setInventoryModified(const InventoryLocation &loc, bool playerSend)
                if (!playerSend)
                        return;
 
-               RemotePlayer *player =
-                       dynamic_cast<RemotePlayer *>(m_env->getPlayer(loc.name.c_str()));
+               RemotePlayer *player = m_env->getPlayer(loc.name.c_str());
 
                if (!player)
                        return;
@@ -1356,7 +1256,7 @@ void Server::setInventoryModified(const InventoryLocation &loc, bool playerSend)
                v3s16 blockpos = getNodeBlockPos(loc.p);
 
                MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
-               if(block)
+               if (block)
                        block->raiseModified(MOD_STATE_WRITE_NEEDED);
 
                setBlockNotSent(blockpos);
@@ -1375,12 +1275,11 @@ void Server::setInventoryModified(const InventoryLocation &loc, bool playerSend)
 
 void Server::SetBlocksNotSent(std::map<v3s16, MapBlock *>& block)
 {
-       std::vector<u16> clients = m_clients.getClientIDs();
+       std::vector<session_t> clients = m_clients.getClientIDs();
        m_clients.lock();
        // Set the modified blocks unsent for all the clients
-       for (std::vector<u16>::iterator i = clients.begin();
-                i != clients.end(); ++i) {
-                       if (RemoteClient *client = m_clients.lockedGetClientNoEx(*i))
+       for (const session_t client_id : clients) {
+                       if (RemoteClient *client = m_clients.lockedGetClientNoEx(client_id))
                                client->SetBlocksNotSent(block);
        }
        m_clients.unlock();
@@ -1388,40 +1287,29 @@ void Server::SetBlocksNotSent(std::map<v3s16, MapBlock *>& block)
 
 void Server::peerAdded(con::Peer *peer)
 {
-       DSTACK(FUNCTION_NAME);
        verbosestream<<"Server::peerAdded(): peer->id="
                        <<peer->id<<std::endl;
 
-       con::PeerChange c;
-       c.type = con::PEER_ADDED;
-       c.peer_id = peer->id;
-       c.timeout = false;
-       m_peer_change_queue.push(c);
+       m_peer_change_queue.push(con::PeerChange(con::PEER_ADDED, peer->id, false));
 }
 
 void Server::deletingPeer(con::Peer *peer, bool timeout)
 {
-       DSTACK(FUNCTION_NAME);
        verbosestream<<"Server::deletingPeer(): peer->id="
                        <<peer->id<<", timeout="<<timeout<<std::endl;
 
        m_clients.event(peer->id, CSE_Disconnect);
-       con::PeerChange c;
-       c.type = con::PEER_REMOVED;
-       c.peer_id = peer->id;
-       c.timeout = timeout;
-       m_peer_change_queue.push(c);
+       m_peer_change_queue.push(con::PeerChange(con::PEER_REMOVED, peer->id, timeout));
 }
 
-bool Server::getClientConInfo(u16 peer_id, con::rtt_stat_type type, float* retval)
+bool Server::getClientConInfo(session_t peer_id, con::rtt_stat_type type, float* retval)
 {
-       *retval = m_con.getPeerStat(peer_id,type);
-       if (*retval == -1) return false;
-       return true;
+       *retval = m_con->getPeerStat(peer_id,type);
+       return *retval != -1;
 }
 
 bool Server::getClientInfo(
-               u16          peer_id,
+               session_t    peer_id,
                ClientState* state,
                u32*         uptime,
                u8*          ser_vers,
@@ -1436,7 +1324,7 @@ bool Server::getClientInfo(
        m_clients.lock();
        RemoteClient* client = m_clients.lockedGetClientNoEx(peer_id, CS_Invalid);
 
-       if (client == NULL) {
+       if (!client) {
                m_clients.unlock();
                return false;
        }
@@ -1457,7 +1345,7 @@ bool Server::getClientInfo(
 
 void Server::handlePeerChanges()
 {
-       while(m_peer_change_queue.size() > 0)
+       while(!m_peer_change_queue.empty())
        {
                con::PeerChange c = m_peer_change_queue.front();
                m_peer_change_queue.pop();
@@ -1493,17 +1381,21 @@ void Server::printToConsoleOnly(const std::string &text)
        }
 }
 
-void Server::Send(NetworkPacketpkt)
+void Server::Send(NetworkPacket *pkt)
 {
-       m_clients.send(pkt->getPeerId(),
+       Send(pkt->getPeerId(), pkt);
+}
+
+void Server::Send(session_t peer_id, NetworkPacket *pkt)
+{
+       m_clients.send(peer_id,
                clientCommandFactoryTable[pkt->getCommand()].channel,
                pkt,
                clientCommandFactoryTable[pkt->getCommand()].reliable);
 }
 
-void Server::SendMovement(u16 peer_id)
+void Server::SendMovement(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
        std::ostringstream os(std::ios_base::binary);
 
        NetworkPacket pkt(TOCLIENT_MOVEMENT, 12 * sizeof(float), peer_id);
@@ -1529,7 +1421,7 @@ void Server::SendPlayerHPOrDie(PlayerSAO *playersao)
        if (!g_settings->getBool("enable_damage"))
                return;
 
-       u16 peer_id   = playersao->getPeerID();
+       session_t peer_id   = playersao->getPeerID();
        bool is_alive = playersao->getHP() > 0;
 
        if (is_alive)
@@ -1538,25 +1430,21 @@ void Server::SendPlayerHPOrDie(PlayerSAO *playersao)
                DiePlayer(peer_id);
 }
 
-void Server::SendHP(u16 peer_id, u8 hp)
+void Server::SendHP(session_t peer_id, u16 hp)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_HP, 1, peer_id);
        pkt << hp;
        Send(&pkt);
 }
 
-void Server::SendBreath(u16 peer_id, u16 breath)
+void Server::SendBreath(session_t peer_id, u16 breath)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_BREATH, 2, peer_id);
        pkt << (u16) breath;
        Send(&pkt);
 }
 
-void Server::SendAccessDenied(u16 peer_id, AccessDeniedCode reason,
+void Server::SendAccessDenied(session_t peer_id, AccessDeniedCode reason,
                const std::string &custom_reason, bool reconnect)
 {
        assert(reason < SERVER_ACCESSDENIED_MAX);
@@ -1571,30 +1459,24 @@ void Server::SendAccessDenied(u16 peer_id, AccessDeniedCode reason,
        Send(&pkt);
 }
 
-void Server::SendAccessDenied_Legacy(u16 peer_id,const std::wstring &reason)
+void Server::SendAccessDenied_Legacy(session_t peer_id,const std::wstring &reason)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_ACCESS_DENIED_LEGACY, 0, peer_id);
        pkt << reason;
        Send(&pkt);
 }
 
-void Server::SendDeathscreen(u16 peer_id,bool set_camera_point_target,
+void Server::SendDeathscreen(session_t peer_id, bool set_camera_point_target,
                v3f camera_point_target)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_DEATHSCREEN, 1 + sizeof(v3f), peer_id);
        pkt << set_camera_point_target << camera_point_target;
        Send(&pkt);
 }
 
-void Server::SendItemDef(u16 peer_id,
+void Server::SendItemDef(session_t peer_id,
                IItemDefManager *itemdef, u16 protocol_version)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_ITEMDEF, 0, peer_id);
 
        /*
@@ -1615,11 +1497,9 @@ void Server::SendItemDef(u16 peer_id,
        Send(&pkt);
 }
 
-void Server::SendNodeDef(u16 peer_id,
+void Server::SendNodeDef(session_t peer_id,
                INodeDefManager *nodedef, u16 protocol_version)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_NODEDEF, 0, peer_id);
 
        /*
@@ -1647,8 +1527,6 @@ void Server::SendNodeDef(u16 peer_id,
 
 void Server::SendInventory(PlayerSAO* playerSAO)
 {
-       DSTACK(FUNCTION_NAME);
-
        UpdateCrafting(playerSAO->getPlayer());
 
        /*
@@ -1666,28 +1544,29 @@ void Server::SendInventory(PlayerSAO* playerSAO)
        Send(&pkt);
 }
 
-void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
+void Server::SendChatMessage(session_t peer_id, const ChatMessage &message)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_CHAT_MESSAGE, 0, peer_id);
-       pkt << message;
+       u8 version = 1;
+       u8 type = message.type;
+       pkt << version << type << std::wstring(L"") << message.message << message.timestamp;
 
        if (peer_id != PEER_ID_INEXISTENT) {
+               RemotePlayer *player = m_env->getPlayer(peer_id);
+               if (!player)
+                       return;
+
                Send(&pkt);
-       }
-       else {
+       } else {
                m_clients.sendToAll(&pkt);
        }
 }
 
-void Server::SendShowFormspecMessage(u16 peer_id, const std::string &formspec,
+void Server::SendShowFormspecMessage(session_t peer_id, const std::string &formspec,
                                      const std::string &formname)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_SHOW_FORMSPEC, 0 , peer_id);
-       if (formspec == "" ){
+       if (formspec.empty()){
                //the client should close the formspec
                pkt.putLongString("");
        } else {
@@ -1699,22 +1578,21 @@ void Server::SendShowFormspecMessage(u16 peer_id, const std::string &formspec,
 }
 
 // Spawns a particle on peer with peer_id
-void Server::SendSpawnParticle(u16 peer_id, u16 protocol_version,
+void Server::SendSpawnParticle(session_t peer_id, u16 protocol_version,
                                v3f pos, v3f velocity, v3f acceleration,
                                float expirationtime, float size, bool collisiondetection,
                                bool collision_removal,
                                bool vertical, const std::string &texture,
                                const struct TileAnimationParams &animation, u8 glow)
 {
-       DSTACK(FUNCTION_NAME);
-       static const float radius =
+       static thread_local const float radius =
                        g_settings->getS16("max_block_send_distance") * MAP_BLOCKSIZE * BS;
 
        if (peer_id == PEER_ID_INEXISTENT) {
-               std::vector<u16> clients = m_clients.getClientIDs();
+               std::vector<session_t> clients = m_clients.getClientIDs();
 
-               for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
-                       RemotePlayer *player = m_env->getPlayer(*i);
+               for (const session_t client_id : clients) {
+                       RemotePlayer *player = m_env->getPlayer(client_id);
                        if (!player)
                                continue;
 
@@ -1726,7 +1604,7 @@ void Server::SendSpawnParticle(u16 peer_id, u16 protocol_version,
                        if (sao->getBasePosition().getDistanceFrom(pos * BS) > radius)
                                continue;
 
-                       SendSpawnParticle(*i, player->protocol_version,
+                       SendSpawnParticle(client_id, player->protocol_version,
                                        pos, velocity, acceleration,
                                        expirationtime, size, collisiondetection,
                                        collision_removal, vertical, texture, animation, glow);
@@ -1751,22 +1629,21 @@ void Server::SendSpawnParticle(u16 peer_id, u16 protocol_version,
 }
 
 // Adds a ParticleSpawner on peer with peer_id
-void Server::SendAddParticleSpawner(u16 peer_id, u16 protocol_version,
+void Server::SendAddParticleSpawner(session_t peer_id, u16 protocol_version,
        u16 amount, float spawntime, v3f minpos, v3f maxpos,
        v3f minvel, v3f maxvel, v3f minacc, v3f maxacc, float minexptime, float maxexptime,
        float minsize, float maxsize, bool collisiondetection, bool collision_removal,
        u16 attached_id, bool vertical, const std::string &texture, u32 id,
        const struct TileAnimationParams &animation, u8 glow)
 {
-       DSTACK(FUNCTION_NAME);
        if (peer_id == PEER_ID_INEXISTENT) {
                // This sucks and should be replaced:
-               std::vector<u16> clients = m_clients.getClientIDs();
-               for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
-                       RemotePlayer *player = m_env->getPlayer(*i);
+               std::vector<session_t> clients = m_clients.getClientIDs();
+               for (const session_t client_id : clients) {
+                       RemotePlayer *player = m_env->getPlayer(client_id);
                        if (!player)
                                continue;
-                       SendAddParticleSpawner(*i, player->protocol_version,
+                       SendAddParticleSpawner(client_id, player->protocol_version,
                                        amount, spawntime, minpos, maxpos,
                                        minvel, maxvel, minacc, maxacc, minexptime, maxexptime,
                                        minsize, maxsize, collisiondetection, collision_removal,
@@ -1795,25 +1672,21 @@ void Server::SendAddParticleSpawner(u16 peer_id, u16 protocol_version,
        Send(&pkt);
 }
 
-void Server::SendDeleteParticleSpawner(u16 peer_id, u32 id)
+void Server::SendDeleteParticleSpawner(session_t peer_id, u32 id)
 {
-       DSTACK(FUNCTION_NAME);
-
-       NetworkPacket pkt(TOCLIENT_DELETE_PARTICLESPAWNER_LEGACY, 2, peer_id);
+       NetworkPacket pkt(TOCLIENT_DELETE_PARTICLESPAWNER, 4, peer_id);
 
        // Ugly error in this packet
-       pkt << (u16) id;
+       pkt << id;
 
-       if (peer_id != PEER_ID_INEXISTENT) {
+       if (peer_id != PEER_ID_INEXISTENT)
                Send(&pkt);
-       }
-       else {
+       else
                m_clients.sendToAll(&pkt);
-       }
 
 }
 
-void Server::SendHUDAdd(u16 peer_id, u32 id, HudElement *form)
+void Server::SendHUDAdd(session_t peer_id, u32 id, HudElement *form)
 {
        NetworkPacket pkt(TOCLIENT_HUDADD, 0 , peer_id);
 
@@ -1824,14 +1697,14 @@ void Server::SendHUDAdd(u16 peer_id, u32 id, HudElement *form)
        Send(&pkt);
 }
 
-void Server::SendHUDRemove(u16 peer_id, u32 id)
+void Server::SendHUDRemove(session_t peer_id, u32 id)
 {
        NetworkPacket pkt(TOCLIENT_HUDRM, 4, peer_id);
        pkt << id;
        Send(&pkt);
 }
 
-void Server::SendHUDChange(u16 peer_id, u32 id, HudElementStat stat, void *value)
+void Server::SendHUDChange(session_t peer_id, u32 id, HudElementStat stat, void *value)
 {
        NetworkPacket pkt(TOCLIENT_HUDCHANGE, 0, peer_id);
        pkt << id << (u8) stat;
@@ -1864,7 +1737,7 @@ void Server::SendHUDChange(u16 peer_id, u32 id, HudElementStat stat, void *value
        Send(&pkt);
 }
 
-void Server::SendHUDSetFlags(u16 peer_id, u32 flags, u32 mask)
+void Server::SendHUDSetFlags(session_t peer_id, u32 flags, u32 mask)
 {
        NetworkPacket pkt(TOCLIENT_HUD_SET_FLAGS, 4 + 4, peer_id);
 
@@ -1875,29 +1748,29 @@ void Server::SendHUDSetFlags(u16 peer_id, u32 flags, u32 mask)
        Send(&pkt);
 }
 
-void Server::SendHUDSetParam(u16 peer_id, u16 param, const std::string &value)
+void Server::SendHUDSetParam(session_t peer_id, u16 param, const std::string &value)
 {
        NetworkPacket pkt(TOCLIENT_HUD_SET_PARAM, 0, peer_id);
        pkt << param << value;
        Send(&pkt);
 }
 
-void Server::SendSetSky(u16 peer_id, const video::SColor &bgcolor,
+void Server::SendSetSky(session_t peer_id, const video::SColor &bgcolor,
                const std::string &type, const std::vector<std::string> &params,
                bool &clouds)
 {
        NetworkPacket pkt(TOCLIENT_SET_SKY, 0, peer_id);
        pkt << bgcolor << type << (u16) params.size();
 
-       for(size_t i=0; i<params.size(); i++)
-               pkt << params[i];
+       for (const std::string &param : params)
+               pkt << param;
 
        pkt << clouds;
 
        Send(&pkt);
 }
 
-void Server::SendCloudParams(u16 peer_id, float density,
+void Server::SendCloudParams(session_t peer_id, float density,
                const video::SColor &color_bright,
                const video::SColor &color_ambient,
                float height,
@@ -1911,7 +1784,7 @@ void Server::SendCloudParams(u16 peer_id, float density,
        Send(&pkt);
 }
 
-void Server::SendOverrideDayNightRatio(u16 peer_id, bool do_override,
+void Server::SendOverrideDayNightRatio(session_t peer_id, bool do_override,
                float ratio)
 {
        NetworkPacket pkt(TOCLIENT_OVERRIDE_DAY_NIGHT_RATIO,
@@ -1922,10 +1795,8 @@ void Server::SendOverrideDayNightRatio(u16 peer_id, bool do_override,
        Send(&pkt);
 }
 
-void Server::SendTimeOfDay(u16 peer_id, u16 time, f32 time_speed)
+void Server::SendTimeOfDay(session_t peer_id, u16 time, f32 time_speed)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_TIME_OF_DAY, 0, peer_id);
        pkt << time << time_speed;
 
@@ -1937,9 +1808,8 @@ void Server::SendTimeOfDay(u16 peer_id, u16 time, f32 time_speed)
        }
 }
 
-void Server::SendPlayerHP(u16 peer_id)
+void Server::SendPlayerHP(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        // In some rare case if the player is disconnected
        // while Lua call l_punch, for example, this can be NULL
@@ -1957,16 +1827,14 @@ void Server::SendPlayerHP(u16 peer_id)
 
 void Server::SendPlayerBreath(PlayerSAO *sao)
 {
-       DSTACK(FUNCTION_NAME);
        assert(sao);
 
        m_script->player_event(sao, "breath_changed");
        SendBreath(sao->getPeerID(), sao->getBreath());
 }
 
-void Server::SendMovePlayer(u16 peer_id)
+void Server::SendMovePlayer(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
        RemotePlayer *player = m_env->getPlayer(peer_id);
        assert(player);
        PlayerSAO *sao = player->getPlayerSAO();
@@ -1987,7 +1855,8 @@ void Server::SendMovePlayer(u16 peer_id)
        Send(&pkt);
 }
 
-void Server::SendLocalPlayerAnimations(u16 peer_id, v2s32 animation_frames[4], f32 animation_speed)
+void Server::SendLocalPlayerAnimations(session_t peer_id, v2s32 animation_frames[4],
+               f32 animation_speed)
 {
        NetworkPacket pkt(TOCLIENT_LOCAL_PLAYER_ANIMATIONS, 0,
                peer_id);
@@ -1998,17 +1867,18 @@ void Server::SendLocalPlayerAnimations(u16 peer_id, v2s32 animation_frames[4], f
        Send(&pkt);
 }
 
-void Server::SendEyeOffset(u16 peer_id, v3f first, v3f third)
+void Server::SendEyeOffset(session_t peer_id, v3f first, v3f third)
 {
        NetworkPacket pkt(TOCLIENT_EYE_OFFSET, 0, peer_id);
        pkt << first << third;
        Send(&pkt);
 }
-void Server::SendPlayerPrivileges(u16 peer_id)
+
+void Server::SendPlayerPrivileges(session_t peer_id)
 {
        RemotePlayer *player = m_env->getPlayer(peer_id);
        assert(player);
-       if(player->peer_id == PEER_ID_INEXISTENT)
+       if(player->getPeerId() == PEER_ID_INEXISTENT)
                return;
 
        std::set<std::string> privs;
@@ -2017,19 +1887,18 @@ void Server::SendPlayerPrivileges(u16 peer_id)
        NetworkPacket pkt(TOCLIENT_PRIVILEGES, 0, peer_id);
        pkt << (u16) privs.size();
 
-       for(std::set<std::string>::const_iterator i = privs.begin();
-                       i != privs.end(); ++i) {
-               pkt << (*i);
+       for (const std::string &priv : privs) {
+               pkt << priv;
        }
 
        Send(&pkt);
 }
 
-void Server::SendPlayerInventoryFormspec(u16 peer_id)
+void Server::SendPlayerInventoryFormspec(session_t peer_id)
 {
        RemotePlayer *player = m_env->getPlayer(peer_id);
        assert(player);
-       if(player->peer_id == PEER_ID_INEXISTENT)
+       if(player->getPeerId() == PEER_ID_INEXISTENT)
                return;
 
        NetworkPacket pkt(TOCLIENT_INVENTORY_FORMSPEC, 0, peer_id);
@@ -2037,7 +1906,7 @@ void Server::SendPlayerInventoryFormspec(u16 peer_id)
        Send(&pkt);
 }
 
-u32 Server::SendActiveObjectRemoveAdd(u16 peer_id, const std::string &datas)
+u32 Server::SendActiveObjectRemoveAdd(session_t peer_id, const std::string &datas)
 {
        NetworkPacket pkt(TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD, datas.size(), peer_id);
        pkt.putRawString(datas.c_str(), datas.size());
@@ -2045,7 +1914,8 @@ u32 Server::SendActiveObjectRemoveAdd(u16 peer_id, const std::string &datas)
        return pkt.getSize();
 }
 
-void Server::SendActiveObjectMessages(u16 peer_id, const std::string &datas, bool reliable)
+void Server::SendActiveObjectMessages(session_t peer_id, const std::string &datas,
+               bool reliable)
 {
        NetworkPacket pkt(TOCLIENT_ACTIVE_OBJECT_MESSAGES,
                        datas.size(), peer_id);
@@ -2055,7 +1925,14 @@ void Server::SendActiveObjectMessages(u16 peer_id, const std::string &datas, boo
        m_clients.send(pkt.getPeerId(),
                        reliable ? clientCommandFactoryTable[pkt.getCommand()].channel : 1,
                        &pkt, reliable);
+}
 
+void Server::SendCSMFlavourLimits(session_t peer_id)
+{
+       NetworkPacket pkt(TOCLIENT_CSM_FLAVOUR_LIMITS,
+               sizeof(m_csm_flavour_limits) + sizeof(m_csm_noderange_limit), peer_id);
+       pkt << m_csm_flavour_limits << m_csm_noderange_limit;
+       Send(&pkt);
 }
 
 s32 Server::playSound(const SimpleSoundSpec &spec,
@@ -2069,27 +1946,25 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
                return -1;
 
        // Filter destination clients
-       std::vector<u16> dst_clients;
-       if(params.to_player != "")
-       {
+       std::vector<session_t> dst_clients;
+       if(!params.to_player.empty()) {
                RemotePlayer *player = m_env->getPlayer(params.to_player.c_str());
                if(!player){
                        infostream<<"Server::playSound: Player \""<<params.to_player
                                        <<"\" not found"<<std::endl;
                        return -1;
                }
-               if(player->peer_id == PEER_ID_INEXISTENT){
+               if (player->getPeerId() == PEER_ID_INEXISTENT) {
                        infostream<<"Server::playSound: Player \""<<params.to_player
                                        <<"\" not connected"<<std::endl;
                        return -1;
                }
-               dst_clients.push_back(player->peer_id);
-       }
-       else {
-               std::vector<u16> clients = m_clients.getClientIDs();
+               dst_clients.push_back(player->getPeerId());
+       } else {
+               std::vector<session_t> clients = m_clients.getClientIDs();
 
-               for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
-                       RemotePlayer *player = m_env->getPlayer(*i);
+               for (const session_t client_id : clients) {
+                       RemotePlayer *player = m_env->getPlayer(client_id);
                        if (!player)
                                continue;
 
@@ -2102,7 +1977,7 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
                                                params.max_hear_distance)
                                        continue;
                        }
-                       dst_clients.push_back(*i);
+                       dst_clients.push_back(client_id);
                }
        }
 
@@ -2121,16 +1996,15 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
        NetworkPacket pkt(TOCLIENT_PLAY_SOUND, 0);
        pkt << id << spec.name << gain
                        << (u8) params.type << pos << params.object
-                       << params.loop << params.fade;
+                       << params.loop << params.fade << params.pitch;
 
        // Backwards compability
        bool play_sound = gain > 0;
 
-       for (std::vector<u16>::iterator i = dst_clients.begin();
-                       i != dst_clients.end(); ++i) {
-               if (play_sound || m_clients.getProtocolVersion(*i) >= 32) {
-                       psound.clients.insert(*i);
-                       m_clients.send(*i, 0, &pkt, true);
+       for (const u16 dst_client : dst_clients) {
+               if (play_sound || m_clients.getProtocolVersion(dst_client) >= 32) {
+                       psound.clients.insert(dst_client);
+                       m_clients.send(dst_client, 0, &pkt, true);
                }
        }
        return id;
@@ -2138,7 +2012,8 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
 void Server::stopSound(s32 handle)
 {
        // Get sound reference
-       UNORDERED_MAP<s32, ServerPlayingSound>::iterator i = m_playing_sounds.find(handle);
+       std::unordered_map<s32, ServerPlayingSound>::iterator i =
+               m_playing_sounds.find(handle);
        if (i == m_playing_sounds.end())
                return;
        ServerPlayingSound &psound = i->second;
@@ -2146,10 +2021,10 @@ void Server::stopSound(s32 handle)
        NetworkPacket pkt(TOCLIENT_STOP_SOUND, 4);
        pkt << handle;
 
-       for (UNORDERED_SET<u16>::iterator i = psound.clients.begin();
-                       i != psound.clients.end(); ++i) {
+       for (std::unordered_set<session_t>::const_iterator si = psound.clients.begin();
+                       si != psound.clients.end(); ++si) {
                // Send as reliable
-               m_clients.send(*i, 0, &pkt, true);
+               m_clients.send(*si, 0, &pkt, true);
        }
        // Remove sound reference
        m_playing_sounds.erase(i);
@@ -2158,8 +2033,8 @@ void Server::stopSound(s32 handle)
 void Server::fadeSound(s32 handle, float step, float gain)
 {
        // Get sound reference
-       UNORDERED_MAP<s32, ServerPlayingSound>::iterator i =
-                       m_playing_sounds.find(handle);
+       std::unordered_map<s32, ServerPlayingSound>::iterator i =
+               m_playing_sounds.find(handle);
        if (i == m_playing_sounds.end())
                return;
 
@@ -2177,7 +2052,7 @@ void Server::fadeSound(s32 handle, float step, float gain)
        NetworkPacket compat_pkt(TOCLIENT_STOP_SOUND, 4);
        compat_pkt << handle;
 
-       for (UNORDERED_SET<u16>::iterator it = psound.clients.begin();
+       for (std::unordered_set<u16>::iterator it = psound.clients.begin();
                        it != psound.clients.end();) {
                if (m_clients.getProtocolVersion(*it) >= 32) {
                        // Send as reliable
@@ -2192,10 +2067,10 @@ void Server::fadeSound(s32 handle, float step, float gain)
        }
 
        // Remove sound reference
-       if (!play_sound || psound.clients.size() == 0)
+       if (!play_sound || psound.clients.empty())
                m_playing_sounds.erase(i);
 
-       if (play_sound && compat_psound.clients.size() > 0) {
+       if (play_sound && !compat_psound.clients.empty()) {
                // Play new sound volume on older clients
                playSound(compat_psound.spec, compat_psound.params);
        }
@@ -2210,11 +2085,11 @@ void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
        NetworkPacket pkt(TOCLIENT_REMOVENODE, 6);
        pkt << p;
 
-       std::vector<u16> clients = m_clients.getClientIDs();
-       for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
+       std::vector<session_t> clients = m_clients.getClientIDs();
+       for (session_t client_id : clients) {
                if (far_players) {
                        // Get player
-                       if (RemotePlayer *player = m_env->getPlayer(*i)) {
+                       if (RemotePlayer *player = m_env->getPlayer(client_id)) {
                                PlayerSAO *sao = player->getPlayerSAO();
                                if (!sao)
                                        continue;
@@ -2222,14 +2097,14 @@ void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
                                // If player is far away, only set modified blocks not sent
                                v3f player_pos = sao->getBasePosition();
                                if (player_pos.getDistanceFrom(p_f) > maxd) {
-                                       far_players->push_back(*i);
+                                       far_players->push_back(client_id);
                                        continue;
                                }
                        }
                }
 
                // Send as reliable
-               m_clients.send(*i, 0, &pkt, true);
+               m_clients.send(client_id, 0, &pkt, true);
        }
 }
 
@@ -2240,11 +2115,11 @@ void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
        float maxd = far_d_nodes*BS;
        v3f p_f = intToFloat(p, BS);
 
-       std::vector<u16> clients = m_clients.getClientIDs();
-       for(std::vector<u16>::iterator i = clients.begin();     i != clients.end(); ++i) {
+       std::vector<session_t> clients = m_clients.getClientIDs();
+       for (const session_t client_id : clients) {
                if (far_players) {
                        // Get player
-                       if (RemotePlayer *player = m_env->getPlayer(*i)) {
+                       if (RemotePlayer *player = m_env->getPlayer(client_id)) {
                                PlayerSAO *sao = player->getPlayerSAO();
                                if (!sao)
                                        continue;
@@ -2252,7 +2127,7 @@ void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
                                // If player is far away, only set modified blocks not sent
                                v3f player_pos = sao->getBasePosition();
                                if(player_pos.getDistanceFrom(p_f) > maxd) {
-                                       far_players->push_back(*i);
+                                       far_players->push_back(client_id);
                                        continue;
                                }
                        }
@@ -2260,8 +2135,8 @@ void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
 
                NetworkPacket pkt(TOCLIENT_ADDNODE, 6 + 2 + 1 + 1 + 1);
                m_clients.lock();
-               RemoteClient* client = m_clients.lockedGetClientNoEx(*i);
-               if (client != 0) {
+               RemoteClient* client = m_clients.lockedGetClientNoEx(client_id);
+               if (client) {
                        pkt << p << n.param0 << n.param1 << n.param2
                                        << (u8) (remove_metadata ? 0 : 1);
                }
@@ -2269,26 +2144,24 @@ void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
 
                // Send as reliable
                if (pkt.getSize() > 0)
-                       m_clients.send(*i, 0, &pkt, true);
+                       m_clients.send(client_id, 0, &pkt, true);
        }
 }
 
 void Server::setBlockNotSent(v3s16 p)
 {
-       std::vector<u16> clients = m_clients.getClientIDs();
+       std::vector<session_t> clients = m_clients.getClientIDs();
        m_clients.lock();
-       for(std::vector<u16>::iterator i = clients.begin();
-               i != clients.end(); ++i) {
-               RemoteClient *client = m_clients.lockedGetClientNoEx(*i);
+       for (const session_t i : clients) {
+               RemoteClient *client = m_clients.lockedGetClientNoEx(i);
                client->SetBlockNotSent(p);
        }
        m_clients.unlock();
 }
 
-void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver, u16 net_proto_version)
+void Server::SendBlockNoLock(session_t peer_id, MapBlock *block, u8 ver,
+               u16 net_proto_version)
 {
-       DSTACK(FUNCTION_NAME);
-
        v3s16 p = block->getPos();
 
        /*
@@ -2309,8 +2182,6 @@ void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver, u16 net_proto
 
 void Server::SendBlocks(float dtime)
 {
-       DSTACK(FUNCTION_NAME);
-
        MutexAutoLock envlock(m_env_mutex);
        //TODO check if one big lock could be faster then multiple small ones
 
@@ -2318,22 +2189,21 @@ void Server::SendBlocks(float dtime)
 
        std::vector<PrioritySortedBlockTransfer> queue;
 
-       s32 total_sending = 0;
+       u32 total_sending = 0;
 
        {
-               ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
+               ScopeProfiler sp2(g_profiler, "Server: selecting blocks for sending");
 
-               std::vector<u16> clients = m_clients.getClientIDs();
+               std::vector<session_t> clients = m_clients.getClientIDs();
 
                m_clients.lock();
-               for(std::vector<u16>::iterator i = clients.begin();
-                       i != clients.end(); ++i) {
-                       RemoteClient *client = m_clients.lockedGetClientNoEx(*i, CS_Active);
+               for (const session_t client_id : clients) {
+                       RemoteClient *client = m_clients.lockedGetClientNoEx(client_id, CS_Active);
 
-                       if (client == NULL)
+                       if (!client)
                                continue;
 
-                       total_sending += client->SendingCount();
+                       total_sending += client->getSendingCount();
                        client->GetNextBlocks(m_env,m_emerge, dtime, queue);
                }
                m_clients.unlock();
@@ -2345,33 +2215,32 @@ void Server::SendBlocks(float dtime)
        std::sort(queue.begin(), queue.end());
 
        m_clients.lock();
-       for(u32 i=0; i<queue.size(); i++)
-       {
-               //TODO: Calculate limit dynamically
-               if(total_sending >= g_settings->getS32
-                               ("max_simultaneous_block_sends_server_total"))
-                       break;
 
-               PrioritySortedBlockTransfer q = queue[i];
+       // Maximal total count calculation
+       // The per-client block sends is halved with the maximal online users
+       u32 max_blocks_to_send = (m_env->getPlayerCount() + g_settings->getU32("max_users")) *
+               g_settings->getU32("max_simultaneous_block_sends_per_client") / 4 + 1;
 
-               MapBlock *block = NULL;
-               try
-               {
-                       block = m_env->getMap().getBlockNoCreate(q.pos);
-               }
-               catch(InvalidPositionException &e)
-               {
+       for (const PrioritySortedBlockTransfer &block_to_send : queue) {
+               if (total_sending >= max_blocks_to_send)
+                       break;
+
+               MapBlock *block = nullptr;
+               try {
+                       block = m_env->getMap().getBlockNoCreate(block_to_send.pos);
+               } catch (const InvalidPositionException &e) {
                        continue;
                }
 
-               RemoteClient *client = m_clients.lockedGetClientNoEx(q.peer_id, CS_Active);
-
-               if(!client)
+               RemoteClient *client = m_clients.lockedGetClientNoEx(block_to_send.peer_id,
+                               CS_Active);
+               if (!client)
                        continue;
 
-               SendBlockNoLock(q.peer_id, block, client->serialization_version, client->net_proto_version);
+               SendBlockNoLock(block_to_send.peer_id, block, client->serialization_version,
+                               client->net_proto_version);
 
-               client->SentBlock(q.pos);
+               client->SentBlock(block_to_send.pos);
                total_sending++;
        }
        m_clients.unlock();
@@ -2379,31 +2248,26 @@ void Server::SendBlocks(float dtime)
 
 void Server::fillMediaCache()
 {
-       DSTACK(FUNCTION_NAME);
-
        infostream<<"Server: Calculating media file checksums"<<std::endl;
 
        // Collect all media file paths
        std::vector<std::string> paths;
-       for(std::vector<ModSpec>::iterator i = m_mods.begin();
-                       i != m_mods.end(); ++i) {
-               const ModSpec &mod = *i;
+       for (const ModSpec &mod : m_mods) {
                paths.push_back(mod.path + DIR_DELIM + "textures");
                paths.push_back(mod.path + DIR_DELIM + "sounds");
                paths.push_back(mod.path + DIR_DELIM + "media");
                paths.push_back(mod.path + DIR_DELIM + "models");
+               paths.push_back(mod.path + DIR_DELIM + "locale");
        }
-       paths.push_back(porting::path_user + DIR_DELIM + "textures" + DIR_DELIM + "server");
-
+       fs::GetRecursiveDirs(paths, porting::path_user + DIR_DELIM +
+                       "textures" + DIR_DELIM + "server");
        // Collect media file information from paths into cache
-       for(std::vector<std::string>::iterator i = paths.begin();
-                       i != paths.end(); ++i) {
-               std::string mediapath = *i;
+       for (const std::string &mediapath : paths) {
                std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
-               for (u32 j = 0; j < dirlist.size(); j++) {
-                       if (dirlist[j].dir) // Ignode dirs
+               for (const fs::DirListNode &dln : dirlist) {
+                       if (dln.dir) // Ignode dirs
                                continue;
-                       std::string filename = dirlist[j].name;
+                       std::string filename = dln.name;
                        // If name contains illegal characters, ignore the file
                        if (!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)) {
                                infostream<<"Server: ignoring illegal file name: \""
@@ -2416,15 +2280,19 @@ void Server::fillMediaCache()
                                ".pcx", ".ppm", ".psd", ".wal", ".rgb",
                                ".ogg",
                                ".x", ".b3d", ".md2", ".obj",
+                               // Custom translation file format
+                               ".tr",
                                NULL
                        };
-                       if (removeStringEnd(filename, supported_ext) == ""){
+                       if (removeStringEnd(filename, supported_ext).empty()){
                                infostream << "Server: ignoring unsupported file extension: \""
                                                << filename << "\"" << std::endl;
                                continue;
                        }
                        // Ok, attempt to load the file and add to cache
-                       std::string filepath = mediapath + DIR_DELIM + filename;
+                       std::string filepath;
+                       filepath.append(mediapath).append(DIR_DELIM).append(filename);
+
                        // Read data
                        std::ifstream fis(filepath.c_str(), std::ios_base::binary);
                        if (!fis.good()) {
@@ -2473,22 +2341,29 @@ void Server::fillMediaCache()
        }
 }
 
-void Server::sendMediaAnnouncement(u16 peer_id)
+void Server::sendMediaAnnouncement(session_t peer_id, const std::string &lang_code)
 {
-       DSTACK(FUNCTION_NAME);
-
        verbosestream << "Server: Announcing files to id(" << peer_id << ")"
                << std::endl;
 
        // Make packet
-       std::ostringstream os(std::ios_base::binary);
-
        NetworkPacket pkt(TOCLIENT_ANNOUNCE_MEDIA, 0, peer_id);
-       pkt << (u16) m_media.size();
 
-       for (UNORDERED_MAP<std::string, MediaInfo>::iterator i = m_media.begin();
-                       i != m_media.end(); ++i) {
-               pkt << i->first << i->second.sha1_digest;
+       u16 media_sent = 0;
+       std::string lang_suffix;
+       lang_suffix.append(".").append(lang_code).append(".tr");
+       for (const auto &i : m_media) {
+               if (str_ends_with(i.first, ".tr") && !str_ends_with(i.first, lang_suffix))
+                       continue;
+               media_sent++;
+       }
+
+       pkt << media_sent;
+
+       for (const auto &i : m_media) {
+               if (str_ends_with(i.first, ".tr") && !str_ends_with(i.first, lang_suffix))
+                       continue;
+               pkt << i.first << i.second.sha1_digest;
        }
 
        pkt << g_settings->get("remote_media");
@@ -2509,11 +2384,9 @@ struct SendableMedia
        {}
 };
 
-void Server::sendRequestedMedia(u16 peer_id,
+void Server::sendRequestedMedia(session_t peer_id,
                const std::vector<std::string> &tosend)
 {
-       DSTACK(FUNCTION_NAME);
-
        verbosestream<<"Server::sendRequestedMedia(): "
                        <<"Sending files to client"<<std::endl;
 
@@ -2523,14 +2396,11 @@ void Server::sendRequestedMedia(u16 peer_id,
        u32 bytes_per_bunch = 5000;
 
        std::vector< std::vector<SendableMedia> > file_bunches;
-       file_bunches.push_back(std::vector<SendableMedia>());
+       file_bunches.emplace_back();
 
        u32 file_size_bunch_total = 0;
 
-       for(std::vector<std::string>::const_iterator i = tosend.begin();
-                       i != tosend.end(); ++i) {
-               const std::string &name = *i;
-
+       for (const std::string &name : tosend) {
                if (m_media.find(name) == m_media.end()) {
                        errorstream<<"Server::sendRequestedMedia(): Client asked for "
                                        <<"unknown file \""<<(name)<<"\""<<std::endl;
@@ -2542,7 +2412,7 @@ void Server::sendRequestedMedia(u16 peer_id,
 
                // Read data
                std::ifstream fis(tpath.c_str(), std::ios_base::binary);
-               if(fis.good() == false){
+               if(!fis.good()){
                        errorstream<<"Server::sendRequestedMedia(): Could not open \""
                                        <<tpath<<"\" for reading"<<std::endl;
                        continue;
@@ -2562,7 +2432,7 @@ void Server::sendRequestedMedia(u16 peer_id,
                                break;
                        }
                }
-               if(bad) {
+               if (bad) {
                        errorstream<<"Server::sendRequestedMedia(): Failed to read \""
                                        <<name<<"\""<<std::endl;
                        continue;
@@ -2570,12 +2440,11 @@ void Server::sendRequestedMedia(u16 peer_id,
                /*infostream<<"Server::sendRequestedMedia(): Loaded \""
                                <<tname<<"\""<<std::endl;*/
                // Put in list
-               file_bunches[file_bunches.size()-1].push_back(
-                               SendableMedia(name, tpath, tmp_os.str()));
+               file_bunches[file_bunches.size()-1].emplace_back(name, tpath, tmp_os.str());
 
                // Start next bunch if got enough data
                if(file_size_bunch_total >= bytes_per_bunch) {
-                       file_bunches.push_back(std::vector<SendableMedia>());
+                       file_bunches.emplace_back();
                        file_size_bunch_total = 0;
                }
 
@@ -2584,7 +2453,7 @@ void Server::sendRequestedMedia(u16 peer_id,
        /* Create and send packets */
 
        u16 num_bunches = file_bunches.size();
-       for(u16 i = 0; i < num_bunches; i++) {
+       for (u16 i = 0; i < num_bunches; i++) {
                /*
                        u16 command
                        u16 total number of texture bunches
@@ -2601,11 +2470,9 @@ void Server::sendRequestedMedia(u16 peer_id,
                NetworkPacket pkt(TOCLIENT_MEDIA, 4 + 0, peer_id);
                pkt << num_bunches << i << (u32) file_bunches[i].size();
 
-               for(std::vector<SendableMedia>::iterator
-                               j = file_bunches[i].begin();
-                               j != file_bunches[i].end(); ++j) {
-                       pkt << j->name;
-                       pkt.putLongString(j->data);
+               for (const SendableMedia &j : file_bunches[i]) {
+                       pkt << j.name;
+                       pkt.putLongString(j.data);
                }
 
                verbosestream << "Server::sendRequestedMedia(): bunch "
@@ -2616,7 +2483,7 @@ void Server::sendRequestedMedia(u16 peer_id,
        }
 }
 
-void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
+void Server::sendDetachedInventory(const std::string &name, session_t peer_id)
 {
        if(m_detached_inventories.count(name) == 0) {
                errorstream<<FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
@@ -2636,25 +2503,21 @@ void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
 
        const std::string &check = m_detached_inventories_player[name];
        if (peer_id == PEER_ID_INEXISTENT) {
-               if (check == "")
+               if (check.empty())
                        return m_clients.sendToAll(&pkt);
                RemotePlayer *p = m_env->getPlayer(check.c_str());
                if (p)
-                       m_clients.send(p->peer_id, 0, &pkt, true);
+                       m_clients.send(p->getPeerId(), 0, &pkt, true);
        } else {
-               if (check == "" || getPlayerName(peer_id) == check)
+               if (check.empty() || getPlayerName(peer_id) == check)
                        Send(&pkt);
        }
 }
 
-void Server::sendDetachedInventories(u16 peer_id)
+void Server::sendDetachedInventories(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
-
-       for(std::map<std::string, Inventory*>::iterator
-                       i = m_detached_inventories.begin();
-                       i != m_detached_inventories.end(); ++i) {
-               const std::string &name = i->first;
+       for (const auto &detached_inventory : m_detached_inventories) {
+               const std::string &name = detached_inventory.first;
                //Inventory *inv = i->second;
                sendDetachedInventory(name, peer_id);
        }
@@ -2664,9 +2527,8 @@ void Server::sendDetachedInventories(u16 peer_id)
        Something random
 */
 
-void Server::DiePlayer(u16 peer_id)
+void Server::DiePlayer(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        // In some rare cases this can be NULL -- if the player is disconnected
        // when a Lua function modifies l_punch, for example
@@ -2686,10 +2548,8 @@ void Server::DiePlayer(u16 peer_id)
        SendDeathscreen(peer_id, false, v3f(0,0,0));
 }
 
-void Server::RespawnPlayer(u16 peer_id)
+void Server::RespawnPlayer(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
-
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        assert(playersao);
 
@@ -2697,8 +2557,8 @@ void Server::RespawnPlayer(u16 peer_id)
                        << playersao->getPlayer()->getName()
                        << " respawns" << std::endl;
 
-       playersao->setHP(PLAYER_MAX_HP);
-       playersao->setBreath(PLAYER_MAX_BREATH);
+       playersao->setHP(playersao->accessObjectProperties()->hp_max);
+       playersao->setBreath(playersao->accessObjectProperties()->breath_max);
 
        bool repositioned = m_script->on_respawnplayer(playersao);
        if (!repositioned) {
@@ -2710,56 +2570,48 @@ void Server::RespawnPlayer(u16 peer_id)
 }
 
 
-void Server::DenySudoAccess(u16 peer_id)
+void Server::DenySudoAccess(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
-
        NetworkPacket pkt(TOCLIENT_DENY_SUDO_MODE, 0, peer_id);
        Send(&pkt);
 }
 
 
-void Server::DenyAccessVerCompliant(u16 peer_id, u16 proto_ver, AccessDeniedCode reason,
+void Server::DenyAccessVerCompliant(session_t peer_id, u16 proto_ver, AccessDeniedCode reason,
                const std::string &str_reason, bool reconnect)
 {
-       if (proto_ver >= 25) {
-               SendAccessDenied(peer_id, reason, str_reason, reconnect);
-       } else {
-               std::wstring wreason = utf8_to_wide(
-                       reason == SERVER_ACCESSDENIED_CUSTOM_STRING ? str_reason :
-                       accessDeniedStrings[(u8)reason]);
-               SendAccessDenied_Legacy(peer_id, wreason);
-       }
+       SendAccessDenied(peer_id, reason, str_reason, reconnect);
 
        m_clients.event(peer_id, CSE_SetDenied);
-       m_con.DisconnectPeer(peer_id);
+       DisconnectPeer(peer_id);
 }
 
 
-void Server::DenyAccess(u16 peer_id, AccessDeniedCode reason, const std::string &custom_reason)
+void Server::DenyAccess(session_t peer_id, AccessDeniedCode reason,
+               const std::string &custom_reason)
 {
-       DSTACK(FUNCTION_NAME);
-
        SendAccessDenied(peer_id, reason, custom_reason);
        m_clients.event(peer_id, CSE_SetDenied);
-       m_con.DisconnectPeer(peer_id);
+       DisconnectPeer(peer_id);
 }
 
 // 13/03/15: remove this function when protocol version 25 will become
 // the minimum version for MT users, maybe in 1 year
-void Server::DenyAccess_Legacy(u16 peer_id, const std::wstring &reason)
+void Server::DenyAccess_Legacy(session_t peer_id, const std::wstring &reason)
 {
-       DSTACK(FUNCTION_NAME);
-
        SendAccessDenied_Legacy(peer_id, reason);
        m_clients.event(peer_id, CSE_SetDenied);
-       m_con.DisconnectPeer(peer_id);
+       DisconnectPeer(peer_id);
 }
 
-void Server::acceptAuth(u16 peer_id, bool forSudoMode)
+void Server::DisconnectPeer(session_t peer_id)
 {
-       DSTACK(FUNCTION_NAME);
+       m_modchannel_mgr->leaveAllChannels(peer_id);
+       m_con->DisconnectPeer(peer_id);
+}
 
+void Server::acceptAuth(session_t peer_id, bool forSudoMode)
+{
        if (!forSudoMode) {
                RemoteClient* client = getClient(peer_id, CS_Invalid);
 
@@ -2787,15 +2639,14 @@ void Server::acceptAuth(u16 peer_id, bool forSudoMode)
        }
 }
 
-void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
+void Server::DeleteClient(session_t peer_id, ClientDeletionReason reason)
 {
-       DSTACK(FUNCTION_NAME);
        std::wstring message;
        {
                /*
                        Clear references to playing sounds
                */
-               for (UNORDERED_MAP<s32, ServerPlayingSound>::iterator
+               for (std::unordered_map<s32, ServerPlayingSound>::iterator
                                 i = m_playing_sounds.begin(); i != m_playing_sounds.end();) {
                        ServerPlayingSound &psound = i->second;
                        psound.clients.erase(peer_id);
@@ -2808,10 +2659,16 @@ void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
                RemotePlayer *player = m_env->getPlayer(peer_id);
 
                /* Run scripts and remove from environment */
-               if (player != NULL) {
+               if (player) {
                        PlayerSAO *playersao = player->getPlayerSAO();
                        assert(playersao);
 
+                       // inform connected clients
+                       NetworkPacket notice(TOCLIENT_UPDATE_PLAYER_LIST, 0, PEER_ID_INEXISTENT);
+                       // (u16) 1 + std::string represents a vector serialization representation
+                       notice << (u8) PLAYER_LIST_REMOVE  << (u16) 1 << std::string(playersao->getPlayer()->getName());
+                       m_clients.sendToAll(&notice);
+                       // run scripts
                        m_script->on_leaveplayer(playersao, reason == CDR_TIMEOUT);
 
                        playersao->disconnected();
@@ -2821,14 +2678,13 @@ void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
                        Print out action
                */
                {
-                       if(player != NULL && reason != CDR_DENY) {
+                       if (player && reason != CDR_DENY) {
                                std::ostringstream os(std::ios_base::binary);
-                               std::vector<u16> clients = m_clients.getClientIDs();
+                               std::vector<session_t> clients = m_clients.getClientIDs();
 
-                               for(std::vector<u16>::iterator i = clients.begin();
-                                       i != clients.end(); ++i) {
+                               for (const session_t client_id : clients) {
                                        // Get player
-                                       RemotePlayer *player = m_env->getPlayer(*i);
+                                       RemotePlayer *player = m_env->getPlayer(client_id);
                                        if (!player)
                                                continue;
 
@@ -2852,14 +2708,14 @@ void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
        }
 
        // Send leave chat message to all remaining clients
-       if(message.length() != 0)
-               SendChatMessage(PEER_ID_INEXISTENT,message);
+       if (!message.empty()) {
+               SendChatMessage(PEER_ID_INEXISTENT,
+                               ChatMessage(CHATMESSAGE_TYPE_ANNOUNCE, message));
+       }
 }
 
 void Server::UpdateCrafting(RemotePlayer *player)
 {
-       DSTACK(FUNCTION_NAME);
-
        // Get a preview for crafting
        ItemStack preview;
        InventoryLocation loc;
@@ -2896,12 +2752,15 @@ void Server::handleChatInterfaceEvent(ChatEvent *evt)
 }
 
 std::wstring Server::handleChat(const std::string &name, const std::wstring &wname,
-       const std::wstring &wmessage, bool check_shout_priv, RemotePlayer *player)
+       std::wstring wmessage, bool check_shout_priv, RemotePlayer *player)
 {
        // If something goes wrong, this player is to blame
        RollbackScopeActor rollback_scope(m_rollback,
                std::string("player:") + name);
 
+       if (g_settings->getBool("strip_color_codes"))
+               wmessage = unescape_enriched(wmessage);
+
        if (player) {
                switch (player->canSendChatMessage()) {
                        case RPLAYER_CHATRESULT_FLOODING: {
@@ -2912,7 +2771,7 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
                                return ws.str();
                        }
                        case RPLAYER_CHATRESULT_KICK:
-                               DenyAccess_Legacy(player->peer_id,
+                               DenyAccess_Legacy(player->getPeerId(),
                                                L"You have been kicked due to message flooding.");
                                return L"";
                        case RPLAYER_CHATRESULT_OK:
@@ -2950,30 +2809,30 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
        /*
                Tell calling method to send the message to sender
        */
-       if (!broadcast_line) {
+       if (!broadcast_line)
                return line;
-       } else {
-               /*
-                       Send the message to others
-               */
-               actionstream << "CHAT: " << wide_to_narrow(line) << std::endl;
 
-               std::vector<u16> clients = m_clients.getClientIDs();
+       /*
+               Send the message to others
+       */
+       actionstream << "CHAT: " << wide_to_narrow(unescape_enriched(line)) << std::endl;
 
-               /*
-                       Send the message back to the inital sender
-                       if they are using protocol version >= 29
-               */
+       std::vector<session_t> clients = m_clients.getClientIDs();
 
-               u16 peer_id_to_avoid_sending = (player ? player->peer_id : PEER_ID_INEXISTENT);
-               if (player && player->protocol_version >= 29)
-                       peer_id_to_avoid_sending = PEER_ID_INEXISTENT;
+       /*
+               Send the message back to the inital sender
+               if they are using protocol version >= 29
+       */
 
-               for (u16 i = 0; i < clients.size(); i++) {
-                       u16 cid = clients[i];
-                       if (cid != peer_id_to_avoid_sending)
-                               SendChatMessage(cid, line);
-               }
+       session_t peer_id_to_avoid_sending =
+               (player ? player->getPeerId() : PEER_ID_INEXISTENT);
+
+       if (player && player->protocol_version >= 29)
+               peer_id_to_avoid_sending = PEER_ID_INEXISTENT;
+
+       for (u16 cid : clients) {
+               if (cid != peer_id_to_avoid_sending)
+                       SendChatMessage(cid, ChatMessage(line));
        }
        return L"";
 }
@@ -2992,7 +2851,7 @@ void Server::handleAdminChat(const ChatEventChat *evt)
        }
 }
 
-RemoteClient* Server::getClient(u16 peer_id, ClientState state_min)
+RemoteClient *Server::getClient(session_t peer_id, ClientState state_min)
 {
        RemoteClient *client = getClientNoEx(peer_id,state_min);
        if(!client)
@@ -3000,23 +2859,23 @@ RemoteClient* Server::getClient(u16 peer_id, ClientState state_min)
 
        return client;
 }
-RemoteClient* Server::getClientNoEx(u16 peer_id, ClientState state_min)
+RemoteClient *Server::getClientNoEx(session_t peer_id, ClientState state_min)
 {
        return m_clients.getClientNoEx(peer_id, state_min);
 }
 
-std::string Server::getPlayerName(u16 peer_id)
+std::string Server::getPlayerName(session_t peer_id)
 {
        RemotePlayer *player = m_env->getPlayer(peer_id);
-       if (player == NULL)
+       if (!player)
                return "[id="+itos(peer_id)+"]";
        return player->getName();
 }
 
-PlayerSAO* Server::getPlayerSAO(u16 peer_id)
+PlayerSAO *Server::getPlayerSAO(session_t peer_id)
 {
        RemotePlayer *player = m_env->getPlayer(peer_id);
-       if (player == NULL)
+       if (!player)
                return NULL;
        return player->getPlayerSAO();
 }
@@ -3034,13 +2893,13 @@ std::wstring Server::getStatusString()
        // Information about clients
        bool first = true;
        os<<L", clients={";
-       std::vector<u16> clients = m_clients.getClientIDs();
-       for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
+       std::vector<session_t> clients = m_clients.getClientIDs();
+       for (session_t client_id : clients) {
                // Get player
-               RemotePlayer *player = m_env->getPlayer(*i);
+               RemotePlayer *player = m_env->getPlayer(client_id);
                // Get name of player
                std::wstring name = L"unknown";
-               if (player != NULL)
+               if (player)
                        name = narrow_to_wide(player->getName());
                // Add name to information string
                if(!first)
@@ -3050,9 +2909,11 @@ std::wstring Server::getStatusString()
                os << name;
        }
        os << L"}";
-       if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
+
+       if (!((ServerMap*)(&m_env->getMap()))->isSavingEnabled())
                os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
-       if(g_settings->get("motd") != "")
+
+       if (!g_settings->get("motd").empty())
                os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
        return os.str();
 }
@@ -3072,18 +2933,17 @@ bool Server::checkPriv(const std::string &name, const std::string &priv)
 
 void Server::reportPrivsModified(const std::string &name)
 {
-       if(name == "") {
-               std::vector<u16> clients = m_clients.getClientIDs();
-               for(std::vector<u16>::iterator i = clients.begin();
-                               i != clients.end(); ++i) {
-                       RemotePlayer *player = m_env->getPlayer(*i);
+       if (name.empty()) {
+               std::vector<session_t> clients = m_clients.getClientIDs();
+               for (const session_t client_id : clients) {
+                       RemotePlayer *player = m_env->getPlayer(client_id);
                        reportPrivsModified(player->getName());
                }
        } else {
                RemotePlayer *player = m_env->getPlayer(name.c_str());
                if (!player)
                        return;
-               SendPlayerPrivileges(player->peer_id);
+               SendPlayerPrivileges(player->getPeerId());
                PlayerSAO *sao = player->getPlayerSAO();
                if(!sao)
                        return;
@@ -3098,7 +2958,7 @@ void Server::reportInventoryFormspecModified(const std::string &name)
        RemotePlayer *player = m_env->getPlayer(name.c_str());
        if (!player)
                return;
-       SendPlayerInventoryFormspec(player->peer_id);
+       SendPlayerInventoryFormspec(player->getPeerId());
 }
 
 void Server::setIpBanned(const std::string &ip, const std::string &name)
@@ -3131,10 +2991,10 @@ void Server::notifyPlayer(const char *name, const std::wstring &msg)
                return;
        }
 
-       if (player->peer_id == PEER_ID_INEXISTENT)
+       if (player->getPeerId() == PEER_ID_INEXISTENT)
                return;
 
-       SendChatMessage(player->peer_id, msg);
+       SendChatMessage(player->getPeerId(), ChatMessage(msg));
 }
 
 bool Server::showFormspec(const char *playername, const std::string &formspec,
@@ -3148,7 +3008,7 @@ bool Server::showFormspec(const char *playername, const std::string &formspec,
        if (!player)
                return false;
 
-       SendShowFormspecMessage(player->peer_id, formspec, formname);
+       SendShowFormspecMessage(player->getPeerId(), formspec, formname);
        return true;
 }
 
@@ -3159,7 +3019,7 @@ u32 Server::hudAdd(RemotePlayer *player, HudElement *form)
 
        u32 id = player->addHud(form);
 
-       SendHUDAdd(player->peer_id, id, form);
+       SendHUDAdd(player->getPeerId(), id, form);
 
        return id;
 }
@@ -3175,7 +3035,7 @@ bool Server::hudRemove(RemotePlayer *player, u32 id) {
 
        delete todel;
 
-       SendHUDRemove(player->peer_id, id);
+       SendHUDRemove(player->getPeerId(), id);
        return true;
 }
 
@@ -3184,7 +3044,7 @@ bool Server::hudChange(RemotePlayer *player, u32 id, HudElementStat stat, void *
        if (!player)
                return false;
 
-       SendHUDChange(player->peer_id, id, stat, data);
+       SendHUDChange(player->getPeerId(), id, stat, data);
        return true;
 }
 
@@ -3193,13 +3053,13 @@ bool Server::hudSetFlags(RemotePlayer *player, u32 flags, u32 mask)
        if (!player)
                return false;
 
-       SendHUDSetFlags(player->peer_id, flags, mask);
+       SendHUDSetFlags(player->getPeerId(), flags, mask);
        player->hud_flags &= ~mask;
        player->hud_flags |= flags;
 
        PlayerSAO* playersao = player->getPlayerSAO();
 
-       if (playersao == NULL)
+       if (!playersao)
                return false;
 
        m_script->player_event(playersao, "hud_changed");
@@ -3217,17 +3077,22 @@ bool Server::hudSetHotbarItemcount(RemotePlayer *player, s32 hotbar_itemcount)
        player->setHotbarItemcount(hotbar_itemcount);
        std::ostringstream os(std::ios::binary);
        writeS32(os, hotbar_itemcount);
-       SendHUDSetParam(player->peer_id, HUD_PARAM_HOTBAR_ITEMCOUNT, os.str());
+       SendHUDSetParam(player->getPeerId(), HUD_PARAM_HOTBAR_ITEMCOUNT, os.str());
        return true;
 }
 
+s32 Server::hudGetHotbarItemcount(RemotePlayer *player) const
+{
+       return player->getHotbarItemcount();
+}
+
 void Server::hudSetHotbarImage(RemotePlayer *player, std::string name)
 {
        if (!player)
                return;
 
        player->setHotbarImage(name);
-       SendHUDSetParam(player->peer_id, HUD_PARAM_HOTBAR_IMAGE, name);
+       SendHUDSetParam(player->getPeerId(), HUD_PARAM_HOTBAR_IMAGE, name);
 }
 
 std::string Server::hudGetHotbarImage(RemotePlayer *player)
@@ -3243,7 +3108,17 @@ void Server::hudSetHotbarSelectedImage(RemotePlayer *player, std::string name)
                return;
 
        player->setHotbarSelectedImage(name);
-       SendHUDSetParam(player->peer_id, HUD_PARAM_HOTBAR_SELECTED_IMAGE, name);
+       SendHUDSetParam(player->getPeerId(), HUD_PARAM_HOTBAR_SELECTED_IMAGE, name);
+}
+
+const std::string& Server::hudGetHotbarSelectedImage(RemotePlayer *player) const
+{
+       return player->getHotbarSelectedImage();
+}
+
+Address Server::getPeerAddress(session_t peer_id)
+{
+       return m_con->GetPeerAddress(peer_id);
 }
 
 bool Server::setLocalPlayerAnimations(RemotePlayer *player,
@@ -3253,7 +3128,7 @@ bool Server::setLocalPlayerAnimations(RemotePlayer *player,
                return false;
 
        player->setLocalAnimations(animation_frames, frame_speed);
-       SendLocalPlayerAnimations(player->peer_id, animation_frames, frame_speed);
+       SendLocalPlayerAnimations(player->getPeerId(), animation_frames, frame_speed);
        return true;
 }
 
@@ -3264,7 +3139,7 @@ bool Server::setPlayerEyeOffset(RemotePlayer *player, v3f first, v3f third)
 
        player->eye_offset_first = first;
        player->eye_offset_third = third;
-       SendEyeOffset(player->peer_id, first, third);
+       SendEyeOffset(player->getPeerId(), first, third);
        return true;
 }
 
@@ -3276,7 +3151,7 @@ bool Server::setSky(RemotePlayer *player, const video::SColor &bgcolor,
                return false;
 
        player->setSky(bgcolor, type, params, clouds);
-       SendSetSky(player->peer_id, bgcolor, type, params, clouds);
+       SendSetSky(player->getPeerId(), bgcolor, type, params, clouds);
        return true;
 }
 
@@ -3290,7 +3165,7 @@ bool Server::setClouds(RemotePlayer *player, float density,
        if (!player)
                return false;
 
-       SendCloudParams(player->peer_id, density,
+       SendCloudParams(player->getPeerId(), density,
                        color_bright, color_ambient, height,
                        thickness, speed);
        return true;
@@ -3303,13 +3178,13 @@ bool Server::overrideDayNightRatio(RemotePlayer *player, bool do_override,
                return false;
 
        player->overrideDayNightRatio(do_override, ratio);
-       SendOverrideDayNightRatio(player->peer_id, do_override, ratio);
+       SendOverrideDayNightRatio(player->getPeerId(), do_override, ratio);
        return true;
 }
 
 void Server::notifyPlayers(const std::wstring &msg)
 {
-       SendChatMessage(PEER_ID_INEXISTENT,msg);
+       SendChatMessage(PEER_ID_INEXISTENT, ChatMessage(msg));
 }
 
 void Server::spawnParticle(const std::string &playername, v3f pos,
@@ -3323,12 +3198,13 @@ void Server::spawnParticle(const std::string &playername, v3f pos,
        if (!m_env)
                return;
 
-       u16 peer_id = PEER_ID_INEXISTENT, proto_ver = 0;
-       if (playername != "") {
+       session_t peer_id = PEER_ID_INEXISTENT;
+       u16 proto_ver = 0;
+       if (!playername.empty()) {
                RemotePlayer *player = m_env->getPlayer(playername.c_str());
                if (!player)
                        return;
-               peer_id = player->peer_id;
+               peer_id = player->getPeerId();
                proto_ver = player->protocol_version;
        }
 
@@ -3349,12 +3225,13 @@ u32 Server::addParticleSpawner(u16 amount, float spawntime,
        if (!m_env)
                return -1;
 
-       u16 peer_id = PEER_ID_INEXISTENT, proto_ver = 0;
-       if (playername != "") {
+       session_t peer_id = PEER_ID_INEXISTENT;
+       u16 proto_ver = 0;
+       if (!playername.empty()) {
                RemotePlayer *player = m_env->getPlayer(playername.c_str());
                if (!player)
                        return -1;
-               peer_id = player->peer_id;
+               peer_id = player->getPeerId();
                proto_ver = player->protocol_version;
        }
 
@@ -3381,12 +3258,12 @@ void Server::deleteParticleSpawner(const std::string &playername, u32 id)
        if (!m_env)
                throw ServerError("Can't delete particle spawners during initialisation!");
 
-       u16 peer_id = PEER_ID_INEXISTENT;
-       if (playername != "") {
+       session_t peer_id = PEER_ID_INEXISTENT;
+       if (!playername.empty()) {
                RemotePlayer *player = m_env->getPlayer(playername.c_str());
                if (!player)
                        return;
-               peer_id = player->peer_id;
+               peer_id = player->getPeerId();
        }
 
        m_env->deleteParticleSpawner(id);
@@ -3427,11 +3304,7 @@ bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
        int num_tried = 0;
        int num_failed = 0;
 
-       for(std::list<RollbackAction>::const_iterator
-                       i = actions.begin();
-                       i != actions.end(); ++i)
-       {
-               const RollbackAction &action = *i;
+       for (const RollbackAction &action : actions) {
                num_tried++;
                bool success = action.applyRevert(map, this, this);
                if(!success){
@@ -3439,13 +3312,13 @@ bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
                        std::ostringstream os;
                        os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
                        infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
-                       if(log)
+                       if (log)
                                log->push_back(os.str());
                }else{
                        std::ostringstream os;
                        os<<"Successfully reverted step ("<<num_tried<<") "<<action.toString();
                        infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
-                       if(log)
+                       if (log)
                                log->push_back(os.str());
                }
        }
@@ -3536,10 +3409,12 @@ v3f Server::findSpawnPos()
        }
 
        bool is_good = false;
+       // Limit spawn range to mapgen edges (determined by 'mapgen_limit')
+       s32 range_max = map.getMapgenParams()->getSpawnRangeMax();
 
        // Try to find a good place a few times
        for(s32 i = 0; i < 4000 && !is_good; i++) {
-               s32 range = 1 + i;
+               s32 range = MYMIN(1 + i, range_max);
                // We're going to try to throw the player to this position
                v2s16 nodepos2d = v2s16(
                        -range + (myrand() % (range * 2)),
@@ -3586,7 +3461,7 @@ void Server::requestShutdown(const std::string &msg, bool reconnect, float delay
        if (delay == 0.0f) {
        // No delay, shutdown immediately
                m_shutdown_requested = true;
-               // only print to the infostream, a chat message saying 
+               // only print to the infostream, a chat message saying
                // "Server Shutting Down" is sent when the server destructs.
                infostream << "*** Immediate Server shutdown requested." << std::endl;
        } else if (delay < 0.0f && m_shutdown_timer > 0.0f) {
@@ -3614,7 +3489,7 @@ void Server::requestShutdown(const std::string &msg, bool reconnect, float delay
        }
 }
 
-PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id, u16 proto_version)
+PlayerSAO* Server::emergePlayer(const char *name, session_t peer_id, u16 proto_version)
 {
        /*
                Try to get an existing player
@@ -3622,7 +3497,7 @@ PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id, u16 proto_version
        RemotePlayer *player = m_env->getPlayer(name);
 
        // If player is already connected, cancel
-       if (player != NULL && player->peer_id != 0) {
+       if (player && player->getPeerId() != PEER_ID_INEXISTENT) {
                infostream<<"emergePlayer(): Player already connected"<<std::endl;
                return NULL;
        }
@@ -3630,7 +3505,7 @@ PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id, u16 proto_version
        /*
                If player with the wanted peer_id already exists, cancel.
        */
-       if (m_env->getPlayer(peer_id) != NULL) {
+       if (m_env->getPlayer(peer_id)) {
                infostream<<"emergePlayer(): Player with wrong name but same"
                                " peer_id already exists"<<std::endl;
                return NULL;
@@ -3671,7 +3546,7 @@ bool Server::registerModStorage(ModMetadata *storage)
 
 void Server::unregisterModStorage(const std::string &name)
 {
-       UNORDERED_MAP<std::string, ModMetadata *>::const_iterator it = m_mod_storages.find(name);
+       std::unordered_map<std::string, ModMetadata *>::const_iterator it = m_mod_storages.find(name);
        if (it != m_mod_storages.end()) {
                // Save unconditionaly on unregistration
                it->second->save(getModStoragePath());
@@ -3681,14 +3556,13 @@ void Server::unregisterModStorage(const std::string &name)
 
 void dedicated_server_loop(Server &server, bool &kill)
 {
-       DSTACK(FUNCTION_NAME);
-
        verbosestream<<"dedicated_server_loop()"<<std::endl;
 
        IntervalLimiter m_profiler_interval;
 
-       static const float steplen = g_settings->getFloat("dedicated_server_step");
-       static const float profiler_print_interval =
+       static thread_local const float steplen =
+                       g_settings->getFloat("dedicated_server_step");
+       static thread_local const float profiler_print_interval =
                        g_settings->getFloat("profiler_print_interval");
 
        for(;;) {
@@ -3723,3 +3597,68 @@ void dedicated_server_loop(Server &server, bool &kill)
                        server.m_bind_addr.getPort());
 #endif
 }
+
+/*
+ * Mod channels
+ */
+
+
+bool Server::joinModChannel(const std::string &channel)
+{
+       return m_modchannel_mgr->joinChannel(channel, PEER_ID_SERVER) &&
+                       m_modchannel_mgr->setChannelState(channel, MODCHANNEL_STATE_READ_WRITE);
+}
+
+bool Server::leaveModChannel(const std::string &channel)
+{
+       return m_modchannel_mgr->leaveChannel(channel, PEER_ID_SERVER);
+}
+
+bool Server::sendModChannelMessage(const std::string &channel, const std::string &message)
+{
+       if (!m_modchannel_mgr->canWriteOnChannel(channel))
+               return false;
+
+       broadcastModChannelMessage(channel, message, PEER_ID_SERVER);
+       return true;
+}
+
+ModChannel* Server::getModChannel(const std::string &channel)
+{
+       return m_modchannel_mgr->getModChannel(channel);
+}
+
+void Server::broadcastModChannelMessage(const std::string &channel,
+               const std::string &message, session_t from_peer)
+{
+       const std::vector<u16> &peers = m_modchannel_mgr->getChannelPeers(channel);
+       if (peers.empty())
+               return;
+
+       if (message.size() > STRING_MAX_LEN) {
+               warningstream << "ModChannel message too long, dropping before sending "
+                               << " (" << message.size() << " > " << STRING_MAX_LEN << ", channel: "
+                               << channel << ")" << std::endl;
+               return;
+       }
+
+       std::string sender;
+       if (from_peer != PEER_ID_SERVER) {
+               sender = getPlayerName(from_peer);
+       }
+
+       NetworkPacket resp_pkt(TOCLIENT_MODCHANNEL_MSG,
+                       2 + channel.size() + 2 + sender.size() + 2 + message.size());
+       resp_pkt << channel << sender << message;
+       for (session_t peer_id : peers) {
+               // Ignore sender
+               if (peer_id == from_peer)
+                       continue;
+
+               Send(peer_id, &resp_pkt);
+       }
+
+       if (from_peer != PEER_ID_SERVER) {
+               m_script->on_modchannel_message(channel, sender, message);
+       }
+}