]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - src/clientiface.cpp
Network cleanup (#6302)
[dragonfireclient.git] / src / clientiface.cpp
index 9b952e36a31cb656066352817a7562c79d97e7a7..585c1cdc61f7ab05622dc86149e14422452d0bb3 100644 (file)
@@ -18,30 +18,31 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include <sstream>
-
 #include "clientiface.h"
-#include "util/numeric.h"
-#include "util/mathconstants.h"
-#include "player.h"
+#include "network/connection.h"
+#include "network/serveropcodes.h"
+#include "remoteplayer.h"
 #include "settings.h"
 #include "mapblock.h"
-#include "network/connection.h"
-#include "environment.h"
+#include "serverenvironment.h"
 #include "map.h"
 #include "emerge.h"
-#include "serverobject.h"              // TODO this is used for cleanup of only
-#include "main.h"                      // for g_settings
+#include "content_sao.h"              // TODO this is used for cleanup of only
 #include "log.h"
+#include "util/srp.h"
+#include "face_position_cache.h"
 
 const char *ClientInterface::statenames[] = {
        "Invalid",
        "Disconnecting",
        "Denied",
        "Created",
-       "InitSent",
+       "AwaitingInit2",
+       "HelloSent",
        "InitDone",
        "DefinitionsSent",
-       "Active"
+       "Active",
+       "SudoMode",
 };
 
 
@@ -59,13 +60,13 @@ void RemoteClient::ResendBlockIfOnWire(v3s16 p)
        }
 }
 
-void RemoteClient::GetNextBlocks(
+void RemoteClient::GetNextBlocks (
                ServerEnvironment *env,
                EmergeManager * emerge,
                float dtime,
                std::vector<PrioritySortedBlockTransfer> &dest)
 {
-       DSTACK(__FUNCTION_NAME);
+       DSTACK(FUNCTION_NAME);
 
 
        // Increment timers
@@ -75,9 +76,13 @@ void RemoteClient::GetNextBlocks(
        if(m_nothing_to_send_pause_timer >= 0)
                return;
 
-       Player *player = env->getPlayer(peer_id);
+       RemotePlayer *player = env->getPlayer(peer_id);
        // This can happen sometimes; clients and players are not in perfect sync.
-       if(player == NULL)
+       if (!player)
+               return;
+
+       PlayerSAO *sao = player->getPlayerSAO();
+       if (!sao)
                return;
 
        // Won't send anything if already sending
@@ -88,8 +93,8 @@ void RemoteClient::GetNextBlocks(
                return;
        }
 
-       v3f playerpos = player->getPosition();
-       v3f playerspeed = player->getSpeed();
+       v3f playerpos = sao->getBasePosition();
+       const v3f &playerspeed = player->getSpeed();
        v3f playerspeeddir(0,0,0);
        if(playerspeed.getLength() > 1.0*BS)
                playerspeeddir = playerspeed / playerspeed.getLength();
@@ -101,10 +106,10 @@ void RemoteClient::GetNextBlocks(
        v3s16 center = getNodeBlockPos(center_nodepos);
 
        // Camera position and direction
-       v3f camera_pos = player->getEyePosition();
+       v3f camera_pos = sao->getEyePosition();
        v3f camera_dir = v3f(0,0,1);
-       camera_dir.rotateYZBy(player->getPitch());
-       camera_dir.rotateXZBy(player->getYaw());
+       camera_dir.rotateYZBy(sao->getPitch());
+       camera_dir.rotateXZBy(sao->getYaw());
 
        /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
                        <<camera_dir.Z<<")"<<std::endl;*/
@@ -167,9 +172,20 @@ void RemoteClient::GetNextBlocks(
        */
        s32 new_nearest_unsent_d = -1;
 
-       const s16 full_d_max = g_settings->getS16("max_block_send_distance");
+       // get view range and camera fov from the client
+       s16 wanted_range = sao->getWantedRange();
+       float camera_fov = sao->getFov();
+       // if FOV, wanted_range are not available (old client), fall back to old default
+       if (wanted_range <= 0) wanted_range = 1000;
+       if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
+
+       const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
+       const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
+       const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
+       //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
+
        s16 d_max = full_d_max;
-       s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
+       s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 
        // Don't loop very much at a time
        s16 max_d_increment_at_time = 2;
@@ -181,19 +197,19 @@ void RemoteClient::GetNextBlocks(
        s32 nearest_sent_d = -1;
        //bool queue_is_full = false;
 
+       const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
+       const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
+
        s16 d;
-       for(d = d_start; d <= d_max; d++)
-       {
+       for(d = d_start; d <= d_max; d++) {
                /*
                        Get the border/face dot coordinates of a "d-radiused"
                        box
                */
-               std::list<v3s16> list;
-               getFacePositions(list, d);
+               std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 
-               std::list<v3s16>::iterator li;
-               for(li=list.begin(); li!=list.end(); ++li)
-               {
+               std::vector<v3s16>::iterator li;
+               for(li = list.begin(); li != list.end(); ++li) {
                        v3s16 p = *li + center;
 
                        /*
@@ -212,49 +228,32 @@ void RemoteClient::GetNextBlocks(
                                max_simul_dynamic = max_simul_sends_setting;
 
                        // Don't select too many blocks for sending
-                       if(num_blocks_selected >= max_simul_dynamic)
-                       {
+                       if (num_blocks_selected >= max_simul_dynamic) {
                                //queue_is_full = true;
                                goto queue_full_break;
                        }
 
                        // Don't send blocks that are currently being transferred
-                       if(m_blocks_sending.find(p) != m_blocks_sending.end())
+                       if (m_blocks_sending.find(p) != m_blocks_sending.end())
                                continue;
 
                        /*
-                               Do not go over-limit
+                               Do not go over max mapgen limit
                        */
-                       if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
-                       || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
-                       || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
-                       || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
-                       || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
-                       || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
+                       if (blockpos_over_max_limit(p))
                                continue;
 
                        // If this is true, inexistent block will be made from scratch
                        bool generate = d <= d_max_gen;
 
-                       {
-                               /*// Limit the generating area vertically to 2/3
-                               if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
-                                       generate = false;*/
-
-                               // Limit the send area vertically to 1/2
-                               if(abs(p.Y - center.Y) > full_d_max / 2)
-                                       continue;
-                       }
-
                        /*
                                Don't generate or send if not in sight
                                FIXME This only works if the client uses a small enough
                                FOV setting. The default of 72 degrees is fine.
                        */
 
-                       float camera_fov = (72.0*M_PI/180) * 4./3.;
-                       if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
-                       {
+                       f32 dist;
+                       if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
                                continue;
                        }
 
@@ -275,25 +274,17 @@ void RemoteClient::GetNextBlocks(
 
                        bool surely_not_found_on_disk = false;
                        bool block_is_invalid = false;
-                       if(block != NULL)
-                       {
+                       if (block) {
                                // Reset usage timer, this block will be of use in the future.
                                block->resetUsageTimer();
 
                                // Block is dummy if data doesn't exist.
                                // It means it has been not found from disk and not generated
-                               if(block->isDummy())
-                               {
+                               if (block->isDummy()) {
                                        surely_not_found_on_disk = true;
                                }
 
-                               // Block is valid if lighting is up-to-date and data exists
-                               if(block->isValid() == false)
-                               {
-                                       block_is_invalid = true;
-                               }
-
-                               if(block->isGenerated() == false)
+                               if (!block->isGenerated())
                                        block_is_invalid = true;
 
                                /*
@@ -303,19 +294,22 @@ void RemoteClient::GetNextBlocks(
                                        Block is near ground level if night-time mesh
                                        differs from day-time mesh.
                                */
-                               if(d >= 4)
-                               {
-                                       if(block->getDayNightDiff() == false)
+                               if (d >= d_opt) {
+                                       if (!block->getDayNightDiff())
                                                continue;
                                }
+
+                               if (occ_cull && !block_is_invalid &&
+                                               env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
+                                       continue;
+                               }
                        }
 
                        /*
                                If block has been marked to not exist on disk (dummy)
                                and generating new ones is not wanted, skip block.
                        */
-                       if(generate == false && surely_not_found_on_disk == true)
-                       {
+                       if (!generate && surely_not_found_on_disk) {
                                // get next one.
                                continue;
                        }
@@ -344,7 +338,7 @@ void RemoteClient::GetNextBlocks(
                        /*
                                Add block to send queue
                        */
-                       PrioritySortedBlockTransfer q((float)d, p, peer_id);
+                       PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 
                        dest.push_back(q);
 
@@ -360,7 +354,7 @@ void RemoteClient::GetNextBlocks(
        } else if(nearest_emergefull_d != -1){
                new_nearest_unsent_d = nearest_emergefull_d;
        } else {
-               if(d > g_settings->getS16("max_block_send_distance")){
+               if(d > full_d_max){
                        new_nearest_unsent_d = 0;
                        m_nothing_to_send_pause_timer = 2.0;
                } else {
@@ -377,17 +371,21 @@ void RemoteClient::GetNextBlocks(
 
 void RemoteClient::GotBlock(v3s16 p)
 {
-       if(m_blocks_sending.find(p) != m_blocks_sending.end())
-               m_blocks_sending.erase(p);
-       else
-       {
-               m_excess_gotblocks++;
+       if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
+               if (m_blocks_sending.find(p) != m_blocks_sending.end())
+                       m_blocks_sending.erase(p);
+               else
+                       m_excess_gotblocks++;
+
+               m_blocks_sent.insert(p);
        }
-       m_blocks_sent.insert(p);
 }
 
 void RemoteClient::SentBlock(v3s16 p)
 {
+       if (m_blocks_modified.find(p) != m_blocks_modified.end())
+               m_blocks_modified.erase(p);
+
        if(m_blocks_sending.find(p) == m_blocks_sending.end())
                m_blocks_sending[p] = 0.0;
        else
@@ -398,22 +396,23 @@ void RemoteClient::SentBlock(v3s16 p)
 void RemoteClient::SetBlockNotSent(v3s16 p)
 {
        m_nearest_unsent_d = 0;
+       m_nothing_to_send_pause_timer = 0;
 
        if(m_blocks_sending.find(p) != m_blocks_sending.end())
                m_blocks_sending.erase(p);
        if(m_blocks_sent.find(p) != m_blocks_sent.end())
                m_blocks_sent.erase(p);
+       m_blocks_modified.insert(p);
 }
 
 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 {
        m_nearest_unsent_d = 0;
+       m_nothing_to_send_pause_timer = 0;
 
-       for(std::map<v3s16, MapBlock*>::iterator
-                       i = blocks.begin();
-                       i != blocks.end(); ++i)
-       {
-               v3s16 p = i->first;
+       for (auto &block : blocks) {
+               v3s16 p = block.first;
+               m_blocks_modified.insert(p);
 
                if(m_blocks_sending.find(p) != m_blocks_sending.end())
                        m_blocks_sending.erase(p);
@@ -431,10 +430,12 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
                //intentionally do nothing
                break;
        case CS_Created:
-               switch(event)
-               {
-               case CSE_Init:
-                       m_state = CS_InitSent;
+               switch (event) {
+               case CSE_Hello:
+                       m_state = CS_HelloSent;
+                       break;
+               case CSE_InitLegacy:
+                       m_state = CS_AwaitingInit2;
                        break;
                case CSE_Disconnect:
                        m_state = CS_Disconnecting;
@@ -451,7 +452,32 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
        case CS_Denied:
                /* don't do anything if in denied state */
                break;
-       case CS_InitSent:
+       case CS_HelloSent:
+               switch(event)
+               {
+               case CSE_AuthAccept:
+                       m_state = CS_AwaitingInit2;
+                       if ((chosen_mech == AUTH_MECHANISM_SRP)
+                                       || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
+                               srp_verifier_delete((SRPVerifier *) auth_data);
+                       chosen_mech = AUTH_MECHANISM_NONE;
+                       break;
+               case CSE_Disconnect:
+                       m_state = CS_Disconnecting;
+                       break;
+               case CSE_SetDenied:
+                       m_state = CS_Denied;
+                       if ((chosen_mech == AUTH_MECHANISM_SRP)
+                                       || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
+                               srp_verifier_delete((SRPVerifier *) auth_data);
+                       chosen_mech = AUTH_MECHANISM_NONE;
+                       break;
+               default:
+                       myerror << "HelloSent: Invalid client state transition! " << event;
+                       throw ClientStateError(myerror.str());
+               }
+               break;
+       case CS_AwaitingInit2:
                switch(event)
                {
                case CSE_GotInit2:
@@ -518,6 +544,13 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
                case CSE_Disconnect:
                        m_state = CS_Disconnecting;
                        break;
+               case CSE_SudoSuccess:
+                       m_state = CS_SudoMode;
+                       if ((chosen_mech == AUTH_MECHANISM_SRP)
+                                       || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
+                               srp_verifier_delete((SRPVerifier *) auth_data);
+                       chosen_mech = AUTH_MECHANISM_NONE;
+                       break;
                /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
                default:
                        myerror << "Active: Invalid client state transition! " << event;
@@ -525,18 +558,36 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
                        break;
                }
                break;
+       case CS_SudoMode:
+               switch(event)
+               {
+               case CSE_SetDenied:
+                       m_state = CS_Denied;
+                       break;
+               case CSE_Disconnect:
+                       m_state = CS_Disconnecting;
+                       break;
+               case CSE_SudoLeave:
+                       m_state = CS_Active;
+                       break;
+               default:
+                       myerror << "Active: Invalid client state transition! " << event;
+                       throw ClientStateError(myerror.str());
+                       break;
+               }
+               break;
        case CS_Disconnecting:
                /* we are already disconnecting */
                break;
        }
 }
 
-u32 RemoteClient::uptime()
+u64 RemoteClient::uptime() const
 {
-       return getTime(PRECISION_SECONDS) - m_connection_time;
+       return porting::getTimeS() - m_connection_time;
 }
 
-ClientInterface::ClientInterface(con::Connection* con)
+ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
 :
        m_con(con),
        m_env(NULL),
@@ -550,41 +601,38 @@ ClientInterface::~ClientInterface()
                Delete clients
        */
        {
-               JMutexAutoLock clientslock(m_clients_mutex);
-
-               for(std::map<u16, RemoteClient*>::iterator
-                       i = m_clients.begin();
-                       i != m_clients.end(); ++i)
-               {
+               MutexAutoLock clientslock(m_clients_mutex);
 
+               for (auto &client_it : m_clients) {
                        // Delete client
-                       delete i->second;
+                       delete client_it.second;
                }
        }
 }
 
-std::list<u16> ClientInterface::getClientIDs(ClientState min_state)
+std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 {
-       std::list<u16> reply;
-       JMutexAutoLock clientslock(m_clients_mutex);
+       std::vector<u16> reply;
+       MutexAutoLock clientslock(m_clients_mutex);
 
-       for(std::map<u16, RemoteClient*>::iterator
-               i = m_clients.begin();
-               i != m_clients.end(); ++i)
-       {
-               if (i->second->getState() >= min_state)
-                       reply.push_back(i->second->peer_id);
+       for (const auto &m_client : m_clients) {
+               if (m_client.second->getState() >= min_state)
+                       reply.push_back(m_client.second->peer_id);
        }
 
        return reply;
 }
 
-std::vector<std::string> ClientInterface::getPlayerNames()
+/**
+ * Verify if user limit was reached.
+ * User limit count all clients from HelloSent state (MT protocol user) to Active state
+ * @return true if user limit was reached
+ */
+bool ClientInterface::isUserLimitReached()
 {
-       return m_clients_names;
+       return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 }
 
-
 void ClientInterface::step(float dtime)
 {
        m_print_info_timer += dtime;
@@ -597,99 +645,115 @@ void ClientInterface::step(float dtime)
 
 void ClientInterface::UpdatePlayerList()
 {
-       if (m_env != NULL)
-               {
-               std::list<u16> clients = getClientIDs();
+       if (m_env) {
+               std::vector<u16> clients = getClientIDs();
                m_clients_names.clear();
 
 
                if(!clients.empty())
                        infostream<<"Players:"<<std::endl;
-               for(std::list<u16>::iterator
-                       i = clients.begin();
-                       i != clients.end(); ++i)
-               {
-                       Player *player = m_env->getPlayer(*i);
-                       if(player==NULL)
+
+               for (u16 i : clients) {
+                       RemotePlayer *player = m_env->getPlayer(i);
+
+                       if (player == NULL)
                                continue;
-                       infostream<<"* "<<player->getName()<<"\t";
+
+                       infostream << "* " << player->getName() << "\t";
 
                        {
-                               JMutexAutoLock clientslock(m_clients_mutex);
-                               RemoteClient* client = lockedGetClientNoEx(*i);
-                               if(client != NULL)
+                               MutexAutoLock clientslock(m_clients_mutex);
+                               RemoteClient* client = lockedGetClientNoEx(i);
+                               if (client)
                                        client->PrintInfo(infostream);
                        }
-                       m_clients_names.push_back(player->getName());
+
+                       m_clients_names.emplace_back(player->getName());
                }
        }
 }
 
 void ClientInterface::send(u16 peer_id, u8 channelnum,
-               NetworkPacket* pkt, bool reliable, bool deletepkt)
+               NetworkPacket* pkt, bool reliable)
 {
        m_con->Send(peer_id, channelnum, pkt, reliable);
-
-       if (deletepkt)
-               delete pkt;
 }
 
-void ClientInterface::sendToAll(u16 channelnum,
-               NetworkPacket* pkt, bool reliable)
+void ClientInterface::sendToAll(NetworkPacket *pkt)
 {
-       JMutexAutoLock clientslock(m_clients_mutex);
-       for(std::map<u16, RemoteClient*>::iterator
-               i = m_clients.begin();
-               i != m_clients.end(); ++i) {
-               RemoteClient *client = i->second;
+       MutexAutoLock clientslock(m_clients_mutex);
+       for (auto &client_it : m_clients) {
+               RemoteClient *client = client_it.second;
 
                if (client->net_proto_version != 0) {
-                       m_con->Send(client->peer_id, channelnum, pkt, reliable);
+                       m_con->Send(client->peer_id,
+                                       clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
+                                       clientCommandFactoryTable[pkt->getCommand()].reliable);
                }
        }
+}
+
+void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
+               u16 min_proto_ver)
+{
+       MutexAutoLock clientslock(m_clients_mutex);
+       for (auto &client_it : m_clients) {
+               RemoteClient *client = client_it.second;
+               NetworkPacket *pkt_to_send = nullptr;
+
+               if (client->net_proto_version >= min_proto_ver) {
+                       pkt_to_send = pkt;
+               } else if (client->net_proto_version != 0) {
+                       pkt_to_send = legacypkt;
+               } else {
+                       warningstream << "Client with unhandled version to handle: '"
+                               << client->net_proto_version << "'";
+                       continue;
+               }
 
-       delete pkt;
+               m_con->Send(client->peer_id,
+                       clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
+                       pkt_to_send,
+                       clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
+       }
 }
 
 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 {
-       JMutexAutoLock clientslock(m_clients_mutex);
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       MutexAutoLock clientslock(m_clients_mutex);
+       RemoteClientMap::const_iterator n = m_clients.find(peer_id);
        // The client may not exist; clients are immediately removed if their
        // access is denied, and this event occurs later then.
-       if(n == m_clients.end())
+       if (n == m_clients.end())
                return NULL;
 
        if (n->second->getState() >= state_min)
                return n->second;
-       else
-               return NULL;
+
+       return NULL;
 }
 
 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 {
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       RemoteClientMap::const_iterator n = m_clients.find(peer_id);
        // The client may not exist; clients are immediately removed if their
        // access is denied, and this event occurs later then.
-       if(n == m_clients.end())
+       if (n == m_clients.end())
                return NULL;
 
        if (n->second->getState() >= state_min)
                return n->second;
-       else
-               return NULL;
+
+       return NULL;
 }
 
 ClientState ClientInterface::getClientState(u16 peer_id)
 {
-       JMutexAutoLock clientslock(m_clients_mutex);
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       MutexAutoLock clientslock(m_clients_mutex);
+       RemoteClientMap::const_iterator n = m_clients.find(peer_id);
        // The client may not exist; clients are immediately removed if their
        // access is denied, and this event occurs later then.
-       if(n == m_clients.end())
+       if (n == m_clients.end())
                return CS_Invalid;
 
        return n->second->getState();
@@ -697,25 +761,23 @@ ClientState ClientInterface::getClientState(u16 peer_id)
 
 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 {
-       JMutexAutoLock clientslock(m_clients_mutex);
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       MutexAutoLock clientslock(m_clients_mutex);
+       RemoteClientMap::iterator n = m_clients.find(peer_id);
        // The client may not exist; clients are immediately removed if their
        // access is denied, and this event occurs later then.
-       if(n != m_clients.end())
+       if (n != m_clients.end())
                n->second->setName(name);
 }
 
 void ClientInterface::DeleteClient(u16 peer_id)
 {
-       JMutexAutoLock conlock(m_clients_mutex);
+       MutexAutoLock conlock(m_clients_mutex);
 
        // Error check
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       RemoteClientMap::iterator n = m_clients.find(peer_id);
        // The client may not exist; clients are immediately removed if their
        // access is denied, and this event occurs later then.
-       if(n == m_clients.end())
+       if (n == m_clients.end())
                return;
 
        /*
@@ -724,12 +786,8 @@ void ClientInterface::DeleteClient(u16 peer_id)
        //TODO this should be done by client destructor!!!
        RemoteClient *client = n->second;
        // Handle objects
-       for(std::set<u16>::iterator
-                       i = client->m_known_objects.begin();
-                       i != client->m_known_objects.end(); ++i)
-       {
+       for (u16 id : client->m_known_objects) {
                // Get object
-               u16 id = *i;
                ServerActiveObject* obj = m_env->getActiveObject(id);
 
                if(obj && obj->m_known_by_count > 0)
@@ -743,13 +801,12 @@ void ClientInterface::DeleteClient(u16 peer_id)
 
 void ClientInterface::CreateClient(u16 peer_id)
 {
-       JMutexAutoLock conlock(m_clients_mutex);
+       MutexAutoLock conlock(m_clients_mutex);
 
        // Error check
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       RemoteClientMap::iterator n = m_clients.find(peer_id);
        // The client shouldn't already exist
-       if(n != m_clients.end()) return;
+       if (n != m_clients.end()) return;
 
        // Create client
        RemoteClient *client = new RemoteClient();
@@ -760,11 +817,10 @@ void ClientInterface::CreateClient(u16 peer_id)
 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 {
        {
-               JMutexAutoLock clientlock(m_clients_mutex);
+               MutexAutoLock clientlock(m_clients_mutex);
 
                // Error check
-               std::map<u16, RemoteClient*>::iterator n;
-               n = m_clients.find(peer_id);
+               RemoteClientMap::iterator n = m_clients.find(peer_id);
 
                // No client to deliver event
                if (n == m_clients.end())
@@ -782,11 +838,10 @@ void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 
 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 {
-       JMutexAutoLock conlock(m_clients_mutex);
+       MutexAutoLock conlock(m_clients_mutex);
 
        // Error check
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       RemoteClientMap::iterator n = m_clients.find(peer_id);
 
        // No client to get version
        if (n == m_clients.end())
@@ -797,11 +852,10 @@ u16 ClientInterface::getProtocolVersion(u16 peer_id)
 
 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 {
-       JMutexAutoLock conlock(m_clients_mutex);
+       MutexAutoLock conlock(m_clients_mutex);
 
        // Error check
-       std::map<u16, RemoteClient*>::iterator n;
-       n = m_clients.find(peer_id);
+       RemoteClientMap::iterator n = m_clients.find(peer_id);
 
        // No client to set versions
        if (n == m_clients.end())