minor refactoring

config.ini

@@ -20,7 +20,7 @@ dbsaveinterval=240
 port=8002
 ip=127.0.0.1
 # distance at which other players and NPCs become visible
-chunksize=40000
+chunksize=30000
 # time, in milliseconds, to wait before kicking a non-responsive client
 # default is 1 minute
 timeout=60000

src/BuddyManager.cpp

@@ -29,6 +29,9 @@ void BuddyManager::requestBuddy(CNSocket* sock, CNPacketData* data) {
 
 	Player* plrReq = PlayerManager::getPlayer(sock);
 
+	if (plrReq == nullptr)
+		return;
+
 	sP_CL2FE_REQ_REQUEST_MAKE_BUDDY* pkt = (sP_CL2FE_REQ_REQUEST_MAKE_BUDDY*)data->buf;
 
 	INITSTRUCT(sP_FE2CL_REP_REQUEST_MAKE_BUDDY_SUCC, resp);
@@ -62,6 +65,9 @@ void BuddyManager::reqBuddyByName(CNSocket* sock, CNPacketData* data) {
 	sP_CL2FE_REQ_PC_FIND_NAME_MAKE_BUDDY* pkt = (sP_CL2FE_REQ_PC_FIND_NAME_MAKE_BUDDY*)data->buf;
 	Player* plrReq = PlayerManager::getPlayer(sock);
 
+	if (plrReq == nullptr)
+		return;
+
 	INITSTRUCT(sP_FE2CL_REP_PC_FIND_NAME_MAKE_BUDDY_SUCC, resp);
 
 	CNSocket* otherSock = sock;
@@ -95,6 +101,9 @@ void BuddyManager::reqAcceptBuddy(CNSocket* sock, CNPacketData* data) {
 	sP_CL2FE_REQ_ACCEPT_MAKE_BUDDY* pkt = (sP_CL2FE_REQ_ACCEPT_MAKE_BUDDY*)data->buf;
 	Player* plrReq = PlayerManager::getPlayer(sock);
 
+	if (plrReq == nullptr)
+		return;
+
 	INITSTRUCT(sP_FE2CL_REP_ACCEPT_MAKE_BUDDY_SUCC, resp);
 
 	CNSocket* otherSock = sock;
@@ -157,6 +166,9 @@ void BuddyManager::reqFindNameBuddyAccept(CNSocket* sock, CNPacketData* data) {
 	sP_CL2FE_REQ_PC_FIND_NAME_ACCEPT_BUDDY* pkt = (sP_CL2FE_REQ_PC_FIND_NAME_ACCEPT_BUDDY*)data->buf;
 	Player* plrReq = PlayerManager::getPlayer(sock);
 
+	if (plrReq == nullptr)
+		return;
+
 	INITSTRUCT(sP_FE2CL_REP_ACCEPT_MAKE_BUDDY_SUCC, resp);
 
 	CNSocket* otherSock = sock;
@@ -227,6 +239,9 @@ void BuddyManager::reqBuddyFreechat(CNSocket* sock, CNPacketData* data) {
 	sP_CL2FE_REQ_SEND_BUDDY_FREECHAT_MESSAGE* pkt = (sP_CL2FE_REQ_SEND_BUDDY_FREECHAT_MESSAGE*)data->buf;
 	Player* plr = PlayerManager::getPlayer(sock);
 
+	if (plr == nullptr)
+		return;
+
 	INITSTRUCT(sP_FE2CL_REP_SEND_BUDDY_FREECHAT_MESSAGE_SUCC, resp);
 
 	CNSocket* otherSock = sock;
@@ -255,6 +270,9 @@ void BuddyManager::reqBuddyMenuchat(CNSocket* sock, CNPacketData* data) {
 	sP_CL2FE_REQ_SEND_BUDDY_MENUCHAT_MESSAGE* pkt = (sP_CL2FE_REQ_SEND_BUDDY_MENUCHAT_MESSAGE*)data->buf;
 	Player* plr = PlayerManager::getPlayer(sock);
 
+	if (plr == nullptr)
+		return;
+
 	INITSTRUCT(sP_FE2CL_REP_SEND_BUDDY_MENUCHAT_MESSAGE_SUCC, resp);
 
 	CNSocket* otherSock = sock;

src/CNShardServer.cpp

@@ -61,7 +61,12 @@ void CNShardServer::killConnection(CNSocket* cns) {
     if (PlayerManager::players.find(cns) == PlayerManager::players.end())
         return;
 
-    int64_t key = PlayerManager::getPlayer(cns)->SerialKey;
+    Player* plr = PlayerManager::getPlayer(cns);
+
+    if (plr == nullptr)
+        return;
+        
+    int64_t key = plr->SerialKey;
     
     // save player to DB
     Database::updatePlayer(PlayerManager::players[cns].plr);

src/ItemManager.cpp

@@ -198,6 +198,9 @@ void ItemManager::itemUseHandler(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_REQ_ITEM_USE* request = (sP_CL2FE_REQ_ITEM_USE*)data->buf;
     Player* player = PlayerManager::getPlayer(sock);
 
+    if (player == nullptr)
+        return;
+
     //gumball can only be used from inventory, so we ignore eIL
     sItemBase gumball = player->Inven[request->iSlotNum];
     sNano nano = player->Nanos[player->equippedNanos[request->iNanoSlot]];
@@ -769,6 +772,9 @@ void ItemManager::chestOpenHandler(CNSocket *sock, CNPacketData *data) {
     sP_CL2FE_REQ_ITEM_CHEST_OPEN *pkt = (sP_CL2FE_REQ_ITEM_CHEST_OPEN *)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // item giving packet
     const size_t resplen = sizeof(sP_FE2CL_REP_REWARD_ITEM) + sizeof(sItemReward);
     assert(resplen < CN_PACKET_BUFFER_SIZE - 8);

src/MissionManager.cpp

@@ -67,6 +67,9 @@ void MissionManager::taskStart(CNSocket* sock, CNPacketData* data) {
     INITSTRUCT(sP_FE2CL_REP_PC_TASK_START_SUCC, response);
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     if (!startTask(plr, missionData->iTaskNum, false)) {
         // TODO: TASK_FAIL?
         response.iTaskNum = missionData->iTaskNum;
@@ -109,6 +112,9 @@ void MissionManager::taskEnd(CNSocket* sock, CNPacketData* data) {
 bool MissionManager::endTask(CNSocket *sock, int32_t taskNum) {
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return false;
+
     if (Tasks.find(taskNum) == Tasks.end())
         return false;
 
@@ -178,13 +184,17 @@ void MissionManager::setMission(CNSocket* sock, CNPacketData* data) {
     if (data->size != sizeof(sP_CL2FE_REQ_PC_SET_CURRENT_MISSION_ID))
         return; // malformed packet
 
+    Player* plr = PlayerManager::getPlayer(sock);
+    
+    if (plr == nullptr)
+        return;
+
     sP_CL2FE_REQ_PC_SET_CURRENT_MISSION_ID* missionData = (sP_CL2FE_REQ_PC_SET_CURRENT_MISSION_ID*)data->buf;
     INITSTRUCT(sP_FE2CL_REP_PC_SET_CURRENT_MISSION_ID, response);
-    
     response.iCurrentMissionID = missionData->iCurrentMissionID;
-    sock->sendPacket((void*)&response, P_FE2CL_REP_PC_SET_CURRENT_MISSION_ID, sizeof(sP_FE2CL_REP_PC_SET_CURRENT_MISSION_ID));
-    Player* plr = PlayerManager::getPlayer(sock);
     plr->CurrentMissionID = missionData->iCurrentMissionID;
+
+    sock->sendPacket((void*)&response, P_FE2CL_REP_PC_SET_CURRENT_MISSION_ID, sizeof(sP_FE2CL_REP_PC_SET_CURRENT_MISSION_ID));
 }
 
 void MissionManager::quitMission(CNSocket* sock, CNPacketData* data) {
@@ -199,6 +209,9 @@ void MissionManager::quitTask(CNSocket* sock, int32_t taskNum) {
     INITSTRUCT(sP_FE2CL_REP_PC_TASK_STOP_SUCC, response);
     Player* plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // update player
     int i;
     for (i = 0; i < ACTIVE_MISSION_COUNT; i++) {
@@ -257,11 +270,15 @@ void MissionManager::dropQuestItem(CNSocket *sock, int task, int count, int id,
     const size_t resplen = sizeof(sP_FE2CL_REP_REWARD_ITEM) + sizeof(sItemReward);
     assert(resplen < CN_PACKET_BUFFER_SIZE);
     // we know it's only one trailing struct, so we can skip full validation
+    
+    Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
 
     uint8_t respbuf[resplen]; // not a variable length array, don't worry
     sP_FE2CL_REP_REWARD_ITEM *reward = (sP_FE2CL_REP_REWARD_ITEM *)respbuf;
     sItemReward *item = (sItemReward *)(respbuf + sizeof(sP_FE2CL_REP_REWARD_ITEM));
-    Player *plr = PlayerManager::getPlayer(sock);
 
     // don't forget to zero the buffer!
     memset(respbuf, 0, resplen);
@@ -308,6 +325,9 @@ int MissionManager::giveMissionReward(CNSocket *sock, int task) {
     Reward *reward = Rewards[task];
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return -1;
+
     int nrewards = 0;
     for (int i = 0; i < 4; i++) {
         if (reward->itemIds[i] != 0)
@@ -367,6 +387,9 @@ int MissionManager::giveMissionReward(CNSocket *sock, int task) {
 void MissionManager::updateFusionMatter(CNSocket* sock, int fusion) {
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     plr->fusionmatter += fusion;
 
     // there's a much lower FM cap in the Future
@@ -400,6 +423,10 @@ void MissionManager::updateFusionMatter(CNSocket* sock, int fusion) {
 
 void MissionManager::mobKilled(CNSocket *sock, int mobid) {
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+    
     bool missionmob = false;
 
     for (int i = 0; i < ACTIVE_MISSION_COUNT; i++) {
@@ -465,6 +492,10 @@ void MissionManager::saveMission(Player* player, int missionId) {
 
 bool MissionManager::isQuestItemFull(CNSocket* sock, int itemId, int itemCount) {
     Player* plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return true;
+
     int slot = findQSlot(plr, itemId);
     if (slot == -1) {
         // this should never happen

src/MobManager.cpp

@@ -32,6 +32,9 @@ void MobManager::pcAttackNpcs(CNSocket *sock, CNPacketData *data) {
     sP_CL2FE_REQ_PC_ATTACK_NPCs* pkt = (sP_CL2FE_REQ_PC_ATTACK_NPCs*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // sanity check
     if (!validInVarPacket(sizeof(sP_CL2FE_REQ_PC_ATTACK_NPCs), pkt->iNPCCnt, sizeof(int32_t), data->size)) {
         std::cout << "[WARN] bad sP_CL2FE_REQ_PC_ATTACK_NPCs packet size\n";
@@ -98,9 +101,11 @@ void MobManager::pcAttackNpcs(CNSocket *sock, CNPacketData *data) {
 }
 
 void MobManager::npcAttackPc(Mob *mob) {
-    // player pointer has already been validated
     Player *plr = PlayerManager::getPlayer(mob->target);
 
+    if (plr == nullptr)
+        return;
+
     const size_t resplen = sizeof(sP_FE2CL_PC_ATTACK_NPCs_SUCC) + sizeof(sAttackResult);
     assert(resplen < CN_PACKET_BUFFER_SIZE - 8);
     uint8_t respbuf[CN_PACKET_BUFFER_SIZE];
@@ -132,6 +137,9 @@ void MobManager::npcAttackPc(Mob *mob) {
 void MobManager::giveReward(CNSocket *sock) {
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     const size_t resplen = sizeof(sP_FE2CL_REP_REWARD_ITEM) + sizeof(sItemReward);
     assert(resplen < CN_PACKET_BUFFER_SIZE - 8);
     // we know it's only one trailing struct, so we can skip full validation
@@ -268,6 +276,9 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
     }
     Player *plr = PlayerManager::getPlayer(mob->target);
 
+    if (plr == nullptr)
+        return;
+
     // did something else kill the player in the mean time?
     if (plr->HP <= 0) {
         mob->target = nullptr;
@@ -501,19 +512,24 @@ std::pair<int,int> MobManager::lerp(int x1, int y1, int x2, int y2, int speed) {
 
 void MobManager::combatBegin(CNSocket *sock, CNPacketData *data) {
     Player *plr = PlayerManager::getPlayer(sock);
-    plr->inCombat = true;
+
+    if (plr != nullptr)
+        plr->inCombat = true;
 }
 
 void MobManager::combatEnd(CNSocket *sock, CNPacketData *data) {
     Player *plr = PlayerManager::getPlayer(sock);
-    plr->inCombat = false;
+
+    if (plr != nullptr)
+        plr->inCombat = false;
 }
 
 void MobManager::dotDamageOnOff(CNSocket *sock, CNPacketData *data) {
     sP_CL2FE_DOT_DAMAGE_ONOFF *pkt = (sP_CL2FE_DOT_DAMAGE_ONOFF*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
-    plr->dotDamage = (bool)pkt->iFlag;
+    if (plr != nullptr)
+        plr->dotDamage = (bool)pkt->iFlag;
 }
 
 void MobManager::dealGooDamage(CNSocket *sock, int amount) {
@@ -527,6 +543,9 @@ void MobManager::dealGooDamage(CNSocket *sock, int amount) {
     sSkillResult_DotDamage *dmg = (sSkillResult_DotDamage*)(respbuf + sizeof(sP_FE2CL_CHAR_TIME_BUFF_TIME_TICK));
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // update player
     plr->HP -= amount;
 
@@ -629,6 +648,9 @@ void MobManager::pcAttackChars(CNSocket *sock, CNPacketData *data) {
     sP_CL2FE_REQ_PC_ATTACK_CHARs* pkt = (sP_CL2FE_REQ_PC_ATTACK_CHARs*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // Unlike the attack mob packet, attacking players packet has an 8-byte trail (Instead of 4 bytes).
     if (!validInVarPacket(sizeof(sP_CL2FE_REQ_PC_ATTACK_CHARs), pkt->iTargetCnt, sizeof(int32_t) * 2, data->size)) {
         std::cout << "[WARN] bad sP_CL2FE_REQ_PC_ATTACK_CHARs packet size\n";

src/NPCManager.cpp

@@ -178,6 +178,10 @@ void NPCManager::npcVendorBuy(CNSocket* sock, CNPacketData* data) {
 
     sP_CL2FE_REQ_PC_VENDOR_ITEM_BUY* req = (sP_CL2FE_REQ_PC_VENDOR_ITEM_BUY*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+
     Item* item = ItemManager::getItemData(req->Item.iID, req->Item.iType);
 
     if (item == nullptr) {
@@ -227,6 +231,9 @@ void NPCManager::npcVendorSell(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_REQ_PC_VENDOR_ITEM_SELL* req = (sP_CL2FE_REQ_PC_VENDOR_ITEM_SELL*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     if (req->iInvenSlotNum < 0 || req->iInvenSlotNum >= AINVEN_COUNT || req->iItemCnt < 0) {
         std::cout << "[WARN] Client failed to sell item in slot " << req->iInvenSlotNum << std::endl;
         INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_ITEM_SELL_FAIL, failResp);
@@ -283,6 +290,10 @@ void NPCManager::npcVendorBuyback(CNSocket* sock, CNPacketData* data) {
 
     sP_CL2FE_REQ_PC_VENDOR_ITEM_RESTORE_BUY* req = (sP_CL2FE_REQ_PC_VENDOR_ITEM_RESTORE_BUY*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+
     Item* item = ItemManager::getItemData(req->Item.iID, req->Item.iType);
 
     if (item == nullptr) {
@@ -374,6 +385,9 @@ void NPCManager::npcVendorBuyBattery(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_REQ_PC_VENDOR_BATTERY_BUY* req = (sP_CL2FE_REQ_PC_VENDOR_BATTERY_BUY*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     int cost = req->Item.iOpt * 100;
     if ((req->Item.iID == 3 ? (plr->batteryW >= 9999) : (plr->batteryN >= 9999)) || plr->money < cost) { // sanity check
         INITSTRUCT(sP_FE2CL_REP_PC_VENDOR_BATTERY_BUY_FAIL, failResp);
@@ -406,6 +420,9 @@ void NPCManager::npcCombineItems(CNSocket* sock, CNPacketData* data) {
 
     sP_CL2FE_REQ_PC_ITEM_COMBINATION* req = (sP_CL2FE_REQ_PC_ITEM_COMBINATION*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
     
     if (req->iCostumeItemSlot < 0 || req->iCostumeItemSlot >= AINVEN_COUNT || req->iStatItemSlot < 0 || req->iStatItemSlot >= AINVEN_COUNT) { // sanity check 1
         INITSTRUCT(sP_FE2CL_REP_PC_ITEM_COMBINATION_FAIL, failResp);
@@ -495,7 +512,9 @@ void NPCManager::npcUnsummonHandler(CNSocket* sock, CNPacketData* data) {
     if (data->size != sizeof(sP_CL2FE_REQ_NPC_UNSUMMON))
         return; // malformed packet
 
-    if (PlayerManager::getPlayer(sock)->accountLevel > 30)
+    Player* plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr || plr->accountLevel > 30)
         return;
     
     sP_CL2FE_REQ_NPC_UNSUMMON* req = (sP_CL2FE_REQ_NPC_UNSUMMON*)data->buf;
@@ -511,7 +530,7 @@ void NPCManager::npcSummonHandler(CNSocket* sock, CNPacketData* data) {
     Player* plr = PlayerManager::getPlayer(sock);
 
     // permission & sanity check
-    if (plr->accountLevel > 30 || req->iNPCType >= 3314)
+    if (plr == nullptr || plr->accountLevel > 30 || req->iNPCType >= 3314)
         return;
 
     int team = NPCData[req->iNPCType]["m_iTeam"];

src/NanoManager.cpp

@@ -61,8 +61,8 @@ void NanoManager::nanoEquipHandler(CNSocket* sock, CNPacketData* data) {
     INITSTRUCT(sP_FE2CL_REP_NANO_EQUIP_SUCC, resp);
     Player *plr = PlayerManager::getPlayer(sock);
 
-    // sanity check
+    // sanity checks
-    if (nano->iNanoSlotNum > 2 || nano->iNanoSlotNum < 0)
+    if (plr == nullptr || nano->iNanoSlotNum > 2 || nano->iNanoSlotNum < 0)
         return;
 
     resp.iNanoID = nano->iNanoID;
@@ -87,7 +87,7 @@ void NanoManager::nanoUnEquipHandler(CNSocket* sock, CNPacketData* data) {
     Player *plr = PlayerManager::getPlayer(sock);
 
     // sanity check
-    if (nano->iNanoSlotNum > 2 || nano->iNanoSlotNum < 0)
+    if (plr == nullptr || nano->iNanoSlotNum > 2 || nano->iNanoSlotNum < 0)
         return;
 
     resp.iNanoSlotNum = nano->iNanoSlotNum;
@@ -110,6 +110,9 @@ void NanoManager::nanoGMGiveHandler(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_REQ_PC_GIVE_NANO* nano = (sP_CL2FE_REQ_PC_GIVE_NANO*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     // Add nano to player
     addNano(sock, nano->iNanoID, 0);
 
@@ -125,6 +128,9 @@ void NanoManager::nanoSummonHandler(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_REQ_NANO_ACTIVE* pkt = (sP_CL2FE_REQ_NANO_ACTIVE*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     summonNano(sock, pkt->iNanoSlotNum);
 
     // Send to client
@@ -135,6 +141,10 @@ void NanoManager::nanoSummonHandler(CNSocket* sock, CNPacketData* data) {
 
 void NanoManager::nanoSkillUseHandler(CNSocket* sock, CNPacketData* data) {
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+
     int16_t nanoId = plr->activeNano;
     int16_t skillId = plr->Nanos[nanoId].iSkillID;
 
@@ -178,8 +188,9 @@ void NanoManager::nanoPotionHandler(CNSocket* sock, CNPacketData* data) {
         return;
     
     Player* player = PlayerManager::getPlayer(sock);
-    //sanity check
+    
-    if (player->activeNano == -1 || player->batteryN == 0)
+    // sanity checks
+    if (player == nullptr || player->activeNano == -1 || player->batteryN == 0)
         return;
 
     sNano nano = player->Nanos[player->activeNano];
@@ -209,6 +220,9 @@ void NanoManager::addNano(CNSocket* sock, int16_t nanoId, int16_t slot, bool spe
 
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     int level = nanoId < plr->level ? plr->level : nanoId;
 
     /*
@@ -255,7 +269,7 @@ void NanoManager::summonNano(CNSocket *sock, int slot) {
     resp.iActiveNanoSlotNum = slot;
     Player *plr = PlayerManager::getPlayer(sock);
 
-    if (slot > 2 || slot < -1)
+    if (plr == nullptr || slot > 2 || slot < -1)
         return; // sanity check
 
     int16_t nanoId = slot == -1 ? -1 : plr->equippedNanos[slot];
@@ -307,6 +321,10 @@ void NanoManager::setNanoSkill(CNSocket* sock, int16_t nanoId, int16_t skillId)
         return;
 
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+    
     sNano nano = plr->Nanos[nanoId];
 
     nano.iSkillID = skillId;
@@ -331,6 +349,10 @@ void NanoManager::resetNanoSkill(CNSocket* sock, int16_t nanoId) {
         return;
 
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+    
     sNano nano = plr->Nanos[nanoId];
 
     // 0 is reset
@@ -449,6 +471,9 @@ bool doLeech(CNSocket *sock, int32_t *pktdata, sSkillResult_Heal_HP *healdata, i
     sSkillResult_Damage *damagedata = (sSkillResult_Damage*)(((uint8_t*)healdata) + sizeof(sSkillResult_Heal_HP));
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return false;
+
     if (plr->HP + amount > PC_MAXHEALTH(plr->level))
         plr->HP = PC_MAXHEALTH(plr->level);
     else
@@ -518,6 +543,9 @@ void activePower(CNSocket *sock, CNPacketData *data,
         
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     plr->Nanos[plr->activeNano].iStamina -= 40;
         
     resp->iPC_ID = plr->iID;
@@ -556,6 +584,9 @@ std::vector<ActivePower> ActivePowers = {
 void NanoManager::nanoBuff(CNSocket* sock, int16_t nanoId, int skillId, int16_t eSkillType, int32_t iCBFlag, int16_t eCharStatusTimeBuffID, int16_t iValue) {
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     if (!validOutVarPacket(sizeof(sP_FE2CL_NANO_SKILL_USE), 1, sizeof(sSkillResult_Buff))) {
         std::cout << "[WARN] bad sP_FE2CL_NANO_SKILL_USE packet size\n";
         return;
@@ -606,6 +637,10 @@ void NanoManager::nanoUnbuff(CNSocket* sock, int32_t iCBFlag, int16_t eCharStatu
     INITSTRUCT(sP_FE2CL_PC_BUFF_UPDATE, resp1);
     
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+
     if (iCBFlag < plr->iConditionBitFlag) // prevents integer underflow
         plr->iConditionBitFlag -= iCBFlag;
     else

src/PlayerManager.cpp

@@ -659,6 +659,9 @@ void PlayerManager::setSpecialPlayer(CNSocket* sock, CNPacketData* data) {
     sP_CL2FE_GM_REQ_PC_SET_VALUE* setData = (sP_CL2FE_GM_REQ_PC_SET_VALUE*)data->buf;
     Player *plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     INITSTRUCT(sP_FE2CL_GM_REP_PC_SET_VALUE, response);
 
     DEBUGLOG(
@@ -718,6 +721,10 @@ void PlayerManager::revivePlayer(CNSocket* sock, CNPacketData* data) {
         return;
 
     Player *plr = PlayerManager::getPlayer(sock);
+
+    if (plr == nullptr)
+        return;
+
     WarpLocation target = PlayerManager::getRespawnPoint(plr);
 
     sP_CL2FE_REQ_PC_REGEN* reviveData = (sP_CL2FE_REQ_PC_REGEN*)data->buf;
@@ -857,8 +864,10 @@ void PlayerManager::changePlayerGuide(CNSocket *sock, CNPacketData *data) {
 
 #pragma region Helper methods
 Player *PlayerManager::getPlayer(CNSocket* key) {
-    assert(key->plr != nullptr);
+    if (players.find(key) != players.end())
-    return key->plr;
+        return players[key].plr;
+    
+    return nullptr;
 }
 
 WarpLocation PlayerManager::getRespawnPoint(Player *plr) {

src/TransportManager.cpp

@@ -26,6 +26,9 @@ void TransportManager::transportRegisterLocationHandler(CNSocket* sock, CNPacket
     sP_CL2FE_REQ_REGIST_TRANSPORTATION_LOCATION* transport = (sP_CL2FE_REQ_REGIST_TRANSPORTATION_LOCATION*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     bool newReg = false; // this is a new registration
     //std::cout << "request to register transport, eTT " << transport->eTT << ", locID " << transport->iLocationID << ", npc " << transport->iNPC_ID << std::endl;
     if (transport->eTT == 1) { // S.C.A.M.P.E.R.
@@ -108,6 +111,9 @@ void TransportManager::transportWarpHandler(CNSocket* sock, CNPacketData* data)
     sP_CL2FE_REQ_PC_WARP_USE_TRANSPORTATION* req = (sP_CL2FE_REQ_PC_WARP_USE_TRANSPORTATION*)data->buf;
     Player* plr = PlayerManager::getPlayer(sock);
 
+    if (plr == nullptr)
+        return;
+
     /*
      * req:
      * eIL -- inventory type
@@ -193,9 +199,7 @@ void TransportManager::stepSkywaySystem() {
 
         std::queue<WarpLocation>* queue = &it->second;
         
-        Player* plr = nullptr;
+        Player* plr = PlayerManager::getPlayer(it->first);
-        if(PlayerManager::players.find(it->first) != PlayerManager::players.end()) // check if socket still has a player
-            plr = PlayerManager::getPlayer(it->first);
         
         if (plr == nullptr) {
             // pluck out dead socket + update iterator