]> git.lizzy.rs Git - minetest.git/blobdiff - src/server.cpp
[CSM] Don't Load the package library (#6944)
[minetest.git] / src / server.cpp
index 7bae69d559b1af295fd28f20099fa30cd781b78b..d011089c3d3a6a4e1c9ad8017484ec81ec916485 100644 (file)
@@ -44,13 +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_sao.h"
 #include "mods.h"
 #include "event_manager.h"
+#include "modchannels.h"
 #include "serverlist.h"
 #include "util/string.h"
 #include "rollback.h"
@@ -60,7 +61,7 @@ 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"
@@ -148,10 +149,11 @@ 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),
@@ -160,7 +162,7 @@ Server::Server(
        m_con(std::make_shared<con::Connection>(PROTOCOL_ID,
                        512,
                        CONNECTION_TIMEOUT,
-                       ipv6,
+                       m_bind_addr.isIPv6(),
                        this)),
        m_itemdef(createItemDefManager()),
        m_nodedef(createNodeDefManager()),
@@ -168,7 +170,8 @@ Server::Server(
        m_event(new EventManager()),
        m_uptime(0),
        m_clients(m_con),
-       m_admin_chat(iface)
+       m_admin_chat(iface),
+       m_modchannel_mgr(new ModChannelMgr())
 {
        m_lag = g_settings->getFloat("dedicated_server_step");
 
@@ -250,9 +253,11 @@ 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.empty() && fs::IsDir(texture_path))
-               m_nodedef->applyTextureOverrides(texture_path + DIR_DELIM + "override.txt");
+       std::vector<std::string> paths;
+       fs::GetRecursiveDirs(paths, g_settings->get("texture_path"));
+       fs::GetRecursiveDirs(paths, m_gamespec.path + DIR_DELIM + "textures");
+       for (const std::string &path : paths)
+               m_nodedef->applyTextureOverrides(path + DIR_DELIM + "override.txt");
 
        m_nodedef->setNodeRegistrationStatus(true);
 
@@ -304,7 +309,7 @@ Server::Server(
 
 Server::~Server()
 {
-       infostream<<"Server destructing"<<std::endl;
+       infostream << "Server destructing" << std::endl;
 
        // Send shutdown message
        SendChatMessage(PEER_ID_INEXISTENT, ChatMessage(CHATMESSAGE_TYPE_ANNOUNCE,
@@ -312,10 +317,7 @@ Server::~Server()
 
        {
                MutexAutoLock envlock(m_env_mutex);
-
-               // Execute script shutdown hooks
-               m_script->on_shutdown();
-
+               
                infostream << "Server: Saving players" << std::endl;
                m_env->saveLoadedPlayers();
 
@@ -331,6 +333,20 @@ Server::~Server()
                }
                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();
@@ -340,10 +356,6 @@ 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;
@@ -355,7 +367,7 @@ 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
@@ -364,35 +376,33 @@ Server::~Server()
        }
 }
 
-void Server::start(Address bind_addr)
+void Server::start()
 {
-       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->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()
@@ -972,7 +982,7 @@ void Server::AsyncRunStep(bool initial_step)
 
 void Server::Receive()
 {
-       u16 peer_id;
+       session_t peer_id;
        try {
                NetworkPacket pkt;
                m_con->Receive(&pkt);
@@ -993,7 +1003,7 @@ void Server::Receive()
        }
 }
 
-PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
+PlayerSAO* Server::StageTwoClientInit(session_t peer_id)
 {
        std::string playername;
        PlayerSAO *playersao = NULL;
@@ -1014,7 +1024,7 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
 
        // If failed, cancel
        if (!playersao || !player) {
-               if (player && player->peer_id != 0) {
+               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 "
@@ -1056,7 +1066,7 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
                // Send information about server to player in chat
                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;
        /*
@@ -1268,10 +1278,10 @@ 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 (const u16 client_id : clients) {
+       for (const session_t client_id : clients) {
                        if (RemoteClient *client = m_clients.lockedGetClientNoEx(client_id))
                                client->SetBlocksNotSent(block);
        }
@@ -1295,14 +1305,14 @@ void Server::deletingPeer(con::Peer *peer, bool timeout)
        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);
        return *retval != -1;
 }
 
 bool Server::getClientInfo(
-               u16          peer_id,
+               session_t    peer_id,
                ClientState* state,
                u32*         uptime,
                u8*          ser_vers,
@@ -1374,15 +1384,20 @@ 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)
 {
        std::ostringstream os(std::ios_base::binary);
 
@@ -1409,7 +1424,7 @@ 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)
@@ -1418,21 +1433,21 @@ void Server::SendPlayerHPOrDie(PlayerSAO *playersao)
                DiePlayer(peer_id);
 }
 
-void Server::SendHP(u16 peer_id, u16 hp)
+void Server::SendHP(session_t peer_id, u16 hp)
 {
        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)
 {
        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);
@@ -1447,14 +1462,14 @@ 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)
 {
        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)
 {
        NetworkPacket pkt(TOCLIENT_DEATHSCREEN, 1 + sizeof(v3f), peer_id);
@@ -1462,7 +1477,7 @@ void Server::SendDeathscreen(u16 peer_id,bool set_camera_point_target,
        Send(&pkt);
 }
 
-void Server::SendItemDef(u16 peer_id,
+void Server::SendItemDef(session_t peer_id,
                IItemDefManager *itemdef, u16 protocol_version)
 {
        NetworkPacket pkt(TOCLIENT_ITEMDEF, 0, peer_id);
@@ -1485,7 +1500,7 @@ 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)
 {
        NetworkPacket pkt(TOCLIENT_NODEDEF, 0, peer_id);
@@ -1532,11 +1547,8 @@ void Server::SendInventory(PlayerSAO* playerSAO)
        Send(&pkt);
 }
 
-void Server::SendChatMessage(u16 peer_id, const ChatMessage &message)
+void Server::SendChatMessage(session_t peer_id, const ChatMessage &message)
 {
-       NetworkPacket legacypkt(TOCLIENT_CHAT_MESSAGE_OLD, 0, peer_id);
-       legacypkt << message.message;
-
        NetworkPacket pkt(TOCLIENT_CHAT_MESSAGE, 0, peer_id);
        u8 version = 1;
        u8 type = message.type;
@@ -1547,16 +1559,13 @@ void Server::SendChatMessage(u16 peer_id, const ChatMessage &message)
                if (!player)
                        return;
 
-               if (player->protocol_version < 35)
-                       Send(&legacypkt);
-               else
-                       Send(&pkt);
+               Send(&pkt);
        } else {
-               m_clients.sendToAllCompat(&pkt, &legacypkt, 35);
+               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)
 {
        NetworkPacket pkt(TOCLIENT_SHOW_FORMSPEC, 0 , peer_id);
@@ -1572,7 +1581,7 @@ 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,
@@ -1583,9 +1592,9 @@ void Server::SendSpawnParticle(u16 peer_id, u16 protocol_version,
                        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 (const u16 client_id : clients) {
+               for (const session_t client_id : clients) {
                        RemotePlayer *player = m_env->getPlayer(client_id);
                        if (!player)
                                continue;
@@ -1623,7 +1632,7 @@ 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,
@@ -1632,8 +1641,8 @@ void Server::SendAddParticleSpawner(u16 peer_id, u16 protocol_version,
 {
        if (peer_id == PEER_ID_INEXISTENT) {
                // This sucks and should be replaced:
-               std::vector<u16> clients = m_clients.getClientIDs();
-               for (const u16 client_id : clients) {
+               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;
@@ -1666,23 +1675,21 @@ 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)
 {
-       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);
 
@@ -1693,14 +1700,14 @@ 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;
@@ -1733,7 +1740,7 @@ 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);
 
@@ -1744,14 +1751,14 @@ 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)
 {
@@ -1766,7 +1773,7 @@ void Server::SendSetSky(u16 peer_id, const video::SColor &bgcolor,
        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,
@@ -1780,7 +1787,7 @@ 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,
@@ -1791,7 +1798,7 @@ 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)
 {
        NetworkPacket pkt(TOCLIENT_TIME_OF_DAY, 0, peer_id);
        pkt << time << time_speed;
@@ -1804,7 +1811,7 @@ void Server::SendTimeOfDay(u16 peer_id, u16 time, f32 time_speed)
        }
 }
 
-void Server::SendPlayerHP(u16 peer_id)
+void Server::SendPlayerHP(session_t peer_id)
 {
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        // In some rare case if the player is disconnected
@@ -1829,7 +1836,7 @@ void Server::SendPlayerBreath(PlayerSAO *sao)
        SendBreath(sao->getPeerID(), sao->getBreath());
 }
 
-void Server::SendMovePlayer(u16 peer_id)
+void Server::SendMovePlayer(session_t peer_id)
 {
        RemotePlayer *player = m_env->getPlayer(peer_id);
        assert(player);
@@ -1851,7 +1858,8 @@ 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);
@@ -1862,17 +1870,18 @@ 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;
@@ -1888,11 +1897,11 @@ void Server::SendPlayerPrivileges(u16 peer_id)
        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);
@@ -1900,7 +1909,7 @@ 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());
@@ -1908,7 +1917,8 @@ 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);
@@ -1920,7 +1930,7 @@ void Server::SendActiveObjectMessages(u16 peer_id, const std::string &datas, boo
                        &pkt, reliable);
 }
 
-void Server::SendCSMFlavourLimits(u16 peer_id)
+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);
@@ -1939,7 +1949,7 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
                return -1;
 
        // Filter destination clients
-       std::vector<u16> dst_clients;
+       std::vector<session_t> dst_clients;
        if(!params.to_player.empty()) {
                RemotePlayer *player = m_env->getPlayer(params.to_player.c_str());
                if(!player){
@@ -1947,16 +1957,16 @@ s32 Server::playSound(const SimpleSoundSpec &spec,
                                        <<"\" 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);
+               dst_clients.push_back(player->getPeerId());
        } else {
-               std::vector<u16> clients = m_clients.getClientIDs();
+               std::vector<session_t> clients = m_clients.getClientIDs();
 
-               for (const u16 client_id : clients) {
+               for (const session_t client_id : clients) {
                        RemotePlayer *player = m_env->getPlayer(client_id);
                        if (!player)
                                continue;
@@ -2014,7 +2024,7 @@ void Server::stopSound(s32 handle)
        NetworkPacket pkt(TOCLIENT_STOP_SOUND, 4);
        pkt << handle;
 
-       for (std::unordered_set<u16>::const_iterator si = psound.clients.begin();
+       for (std::unordered_set<session_t>::const_iterator si = psound.clients.begin();
                        si != psound.clients.end(); ++si) {
                // Send as reliable
                m_clients.send(*si, 0, &pkt, true);
@@ -2078,8 +2088,8 @@ void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
        NetworkPacket pkt(TOCLIENT_REMOVENODE, 6);
        pkt << p;
 
-       std::vector<u16> clients = m_clients.getClientIDs();
-       for (u16 client_id : clients) {
+       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(client_id)) {
@@ -2108,8 +2118,8 @@ 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 (const u16 client_id : clients) {
+       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(client_id)) {
@@ -2143,16 +2153,17 @@ void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
 
 void Server::setBlockNotSent(v3s16 p)
 {
-       std::vector<u16> clients = m_clients.getClientIDs();
+       std::vector<session_t> clients = m_clients.getClientIDs();
        m_clients.lock();
-       for (const u16 i : clients) {
+       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)
 {
        v3s16 p = block->getPos();
 
@@ -2181,21 +2192,21 @@ void Server::SendBlocks(float dtime)
 
        std::vector<PrioritySortedBlockTransfer> queue;
 
-       s32 total_sending = 0;
+       u32 total_sending = 0;
 
        {
                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 (const u16 client_id : clients) {
+               for (const session_t client_id : clients) {
                        RemoteClient *client = m_clients.lockedGetClientNoEx(client_id, CS_Active);
 
                        if (!client)
                                continue;
 
-                       total_sending += client->SendingCount();
+                       total_sending += client->getSendingCount();
                        client->GetNextBlocks(m_env,m_emerge, dtime, queue);
                }
                m_clients.unlock();
@@ -2207,11 +2218,13 @@ void Server::SendBlocks(float dtime)
        std::sort(queue.begin(), queue.end());
 
        m_clients.lock();
-       s32 max_blocks_to_send =
-                       g_settings->getS32("max_simultaneous_block_sends_server_total");
+
+       // 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;
 
        for (const PrioritySortedBlockTransfer &block_to_send : queue) {
-               //TODO: Calculate limit dynamically
                if (total_sending >= max_blocks_to_send)
                        break;
 
@@ -2249,7 +2262,8 @@ void Server::fillMediaCache()
                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, m_gamespec.path + DIR_DELIM + "textures");
+       fs::GetRecursiveDirs(paths, porting::path_user + DIR_DELIM + "textures" + DIR_DELIM + "server");
 
        // Collect media file information from paths into cache
        for (const std::string &mediapath : paths) {
@@ -2331,7 +2345,7 @@ void Server::fillMediaCache()
        }
 }
 
-void Server::sendMediaAnnouncement(u16 peer_id, const std::string &lang_code)
+void Server::sendMediaAnnouncement(session_t peer_id, const std::string &lang_code)
 {
        verbosestream << "Server: Announcing files to id(" << peer_id << ")"
                << std::endl;
@@ -2374,7 +2388,7 @@ struct SendableMedia
        {}
 };
 
-void Server::sendRequestedMedia(u16 peer_id,
+void Server::sendRequestedMedia(session_t peer_id,
                const std::vector<std::string> &tosend)
 {
        verbosestream<<"Server::sendRequestedMedia(): "
@@ -2473,7 +2487,7 @@ 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;
@@ -2497,14 +2511,14 @@ void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
                        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.empty() || getPlayerName(peer_id) == check)
                        Send(&pkt);
        }
 }
 
-void Server::sendDetachedInventories(u16 peer_id)
+void Server::sendDetachedInventories(session_t peer_id)
 {
        for (const auto &detached_inventory : m_detached_inventories) {
                const std::string &name = detached_inventory.first;
@@ -2517,7 +2531,7 @@ void Server::sendDetachedInventories(u16 peer_id)
        Something random
 */
 
-void Server::DiePlayer(u16 peer_id)
+void Server::DiePlayer(session_t peer_id)
 {
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        // In some rare cases this can be NULL -- if the player is disconnected
@@ -2538,7 +2552,7 @@ 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)
 {
        PlayerSAO *playersao = getPlayerSAO(peer_id);
        assert(playersao);
@@ -2548,7 +2562,7 @@ void Server::RespawnPlayer(u16 peer_id)
                        << " respawns" << std::endl;
 
        playersao->setHP(playersao->accessObjectProperties()->hp_max);
-       playersao->setBreath(PLAYER_MAX_BREATH);
+       playersao->setBreath(playersao->accessObjectProperties()->breath_max);
 
        bool repositioned = m_script->on_respawnplayer(playersao);
        if (!repositioned) {
@@ -2560,47 +2574,47 @@ void Server::RespawnPlayer(u16 peer_id)
 }
 
 
-void Server::DenySudoAccess(u16 peer_id)
+void Server::DenySudoAccess(session_t peer_id)
 {
        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)
 {
        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)
 {
        SendAccessDenied_Legacy(peer_id, reason);
        m_clients.event(peer_id, CSE_SetDenied);
+       DisconnectPeer(peer_id);
+}
+
+void Server::DisconnectPeer(session_t peer_id)
+{
+       m_modchannel_mgr->leaveAllChannels(peer_id);
        m_con->DisconnectPeer(peer_id);
 }
 
-void Server::acceptAuth(u16 peer_id, bool forSudoMode)
+void Server::acceptAuth(session_t peer_id, bool forSudoMode)
 {
        if (!forSudoMode) {
                RemoteClient* client = getClient(peer_id, CS_Invalid);
@@ -2629,7 +2643,7 @@ 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)
 {
        std::wstring message;
        {
@@ -2670,9 +2684,9 @@ void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
                {
                        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 (const u16 client_id : clients) {
+                               for (const session_t client_id : clients) {
                                        // Get player
                                        RemotePlayer *player = m_env->getPlayer(client_id);
                                        if (!player)
@@ -2761,7 +2775,7 @@ 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:
@@ -2807,14 +2821,16 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
        */
        actionstream << "CHAT: " << wide_to_narrow(unescape_enriched(line)) << std::endl;
 
-       std::vector<u16> clients = m_clients.getClientIDs();
+       std::vector<session_t> clients = m_clients.getClientIDs();
 
        /*
                Send the message back to the inital sender
                if they are using protocol version >= 29
        */
 
-       u16 peer_id_to_avoid_sending = (player ? player->peer_id : PEER_ID_INEXISTENT);
+       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;
 
@@ -2839,7 +2855,7 @@ 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)
@@ -2847,12 +2863,12 @@ 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)
@@ -2860,7 +2876,7 @@ std::string Server::getPlayerName(u16 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)
@@ -2881,8 +2897,8 @@ std::wstring Server::getStatusString()
        // Information about clients
        bool first = true;
        os<<L", clients={";
-       std::vector<u16> clients = m_clients.getClientIDs();
-       for (u16 client_id : clients) {
+       std::vector<session_t> clients = m_clients.getClientIDs();
+       for (session_t client_id : clients) {
                // Get player
                RemotePlayer *player = m_env->getPlayer(client_id);
                // Get name of player
@@ -2922,8 +2938,8 @@ bool Server::checkPriv(const std::string &name, const std::string &priv)
 void Server::reportPrivsModified(const std::string &name)
 {
        if (name.empty()) {
-               std::vector<u16> clients = m_clients.getClientIDs();
-               for (const u16 client_id : clients) {
+               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());
                }
@@ -2931,7 +2947,7 @@ void Server::reportPrivsModified(const std::string &name)
                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;
@@ -2946,7 +2962,7 @@ 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)
@@ -2979,10 +2995,10 @@ 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, ChatMessage(msg));
+       SendChatMessage(player->getPeerId(), ChatMessage(msg));
 }
 
 bool Server::showFormspec(const char *playername, const std::string &formspec,
@@ -2996,7 +3012,7 @@ 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;
 }
 
@@ -3007,7 +3023,7 @@ 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;
 }
@@ -3023,7 +3039,7 @@ bool Server::hudRemove(RemotePlayer *player, u32 id) {
 
        delete todel;
 
-       SendHUDRemove(player->peer_id, id);
+       SendHUDRemove(player->getPeerId(), id);
        return true;
 }
 
@@ -3032,7 +3048,7 @@ 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;
 }
 
@@ -3041,7 +3057,7 @@ 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;
 
@@ -3065,7 +3081,7 @@ 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;
 }
 
@@ -3080,7 +3096,7 @@ void Server::hudSetHotbarImage(RemotePlayer *player, std::string name)
                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)
@@ -3096,7 +3112,7 @@ 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
@@ -3104,7 +3120,7 @@ const std::string& Server::hudGetHotbarSelectedImage(RemotePlayer *player) const
        return player->getHotbarSelectedImage();
 }
 
-Address Server::getPeerAddress(u16 peer_id)
+Address Server::getPeerAddress(session_t peer_id)
 {
        return m_con->GetPeerAddress(peer_id);
 }
@@ -3116,7 +3132,7 @@ 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;
 }
 
@@ -3127,7 +3143,7 @@ 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;
 }
 
@@ -3139,7 +3155,7 @@ 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;
 }
 
@@ -3153,7 +3169,7 @@ 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;
@@ -3166,7 +3182,7 @@ 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;
 }
 
@@ -3186,12 +3202,13 @@ void Server::spawnParticle(const std::string &playername, v3f pos,
        if (!m_env)
                return;
 
-       u16 peer_id = PEER_ID_INEXISTENT, proto_ver = 0;
+       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;
        }
 
@@ -3212,12 +3229,13 @@ u32 Server::addParticleSpawner(u16 amount, float spawntime,
        if (!m_env)
                return -1;
 
-       u16 peer_id = PEER_ID_INEXISTENT, proto_ver = 0;
+       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;
        }
 
@@ -3244,12 +3262,12 @@ 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;
+       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);
@@ -3475,7 +3493,7 @@ 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
@@ -3483,7 +3501,7 @@ 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 && player->peer_id != 0) {
+       if (player && player->getPeerId() != PEER_ID_INEXISTENT) {
                infostream<<"emergePlayer(): Player already connected"<<std::endl;
                return NULL;
        }
@@ -3583,3 +3601,68 @@ 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);
+       }
+}