Harden playerbot logout & packet dispatch; add null-safety in chat hooks and RPG checks (#1529)

src/BroadcastHelper.cpp

@@ -947,8 +947,21 @@ bool BroadcastHelper::BroadcastSuggestThunderfury(PlayerbotAI* ai, Player* bot)
     {
         std::map<std::string, std::string> placeholders;
         ItemTemplate const* thunderfuryProto = sObjectMgr->GetItemTemplate(19019);
-        placeholders["%thunderfury_link"] = GET_PLAYERBOT_AI(bot)->GetChatHelper()->FormatItem(thunderfuryProto);
-
+        // placeholders["%thunderfury_link"] = GET_PLAYERBOT_AI(bot)->GetChatHelper()->FormatItem(thunderfuryProto); // Old code
+		// [Crash fix] Protect from nil AI : a real player doesn't have PlayerbotAI.
+        // Before: direct deref GET_PLAYERBOT_AI(bot)->... could crash World/General.
+        if (auto* ai = GET_PLAYERBOT_AI(bot))
+        {
+	        if (auto* chat = ai->GetChatHelper())
+		        placeholders["%thunderfury_link"] = chat->FormatItem(thunderfuryProto);
+	        else
+		        placeholders["%thunderfury_link"] = ""; // fallback: no chat helper
+        }
+        else
+        {
+	        placeholders["%thunderfury_link"] = "";     // fallback: no d'AI (real player)
+        }
+        // End crash fix
         return BroadcastToChannelWithGlobalChance(
             ai,
             BOT_TEXT2("thunderfury_spam", placeholders),

src/PlayerbotAI.cpp

@@ -2373,7 +2373,7 @@ std::string PlayerbotAI::GetLocalizedGameObjectName(uint32 entry)
     return name;
 }
 
-std::vector<Player*> PlayerbotAI::GetPlayersInGroup()
+/*std::vector<Player*> PlayerbotAI::GetPlayersInGroup()
 {
     std::vector<Player*> members;
 
@@ -2392,6 +2392,34 @@ std::vector<Player*> PlayerbotAI::GetPlayersInGroup()
         members.push_back(ref->GetSource());
     }
 
+    return members;
+}*/
+
+std::vector<Player*> PlayerbotAI::GetPlayersInGroup()
+{
+    std::vector<Player*> members;
+
+    Group* group = bot->GetGroup();
+    if (!group)
+        return members;
+
+    for (GroupReference* ref = group->GetFirstMember(); ref; ref = ref->next())
+    {
+        Player* member = ref->GetSource();
+        if (!member)
+            continue;
+
+        // Celaning, we don't call 2 times GET_PLAYERBOT_AI and never reference it if nil
+        if (auto* ai = GET_PLAYERBOT_AI(member))
+        {
+            // If it's a bot (not real player) => we ignor it
+            if (!ai->IsRealPlayer())
+                continue;
+        }
+
+        members.push_back(member);
+    }
+
     return members;
 }
 

src/PlayerbotMgr.cpp

@@ -36,10 +36,28 @@
 #include "BroadcastHelper.h"
 #include "PlayerbotDbStore.h"
 #include "WorldSessionMgr.h"
-#include "DatabaseEnv.h"        // Added for gender choice
-#include <algorithm>            // Added for gender choice
-#include "Log.h" // removes a long-standing crash (0xC0000005 ACCESS_VIOLATION)
+#include "DatabaseEnv.h"
+#include <algorithm>
+#include "Log.h"
 #include <shared_mutex> // removes a long-standing crash (0xC0000005 ACCESS_VIOLATION)
+#include "TravelMgr.h"
+
+namespace {
+    // [Crash fix] Centralize clearing of pointer values in the AI context
+    static void ClearAIContextPointerValues(PlayerbotAI* ai)
+    {
+        if (!ai) return;
+        if (AiObjectContext* ctx = ai->GetAiObjectContext())
+        {
+            // Known today
+            if (auto* tt = ctx->GetValue<TravelTarget*>("travel target"))
+                tt->Set(nullptr);
+
+            // TODO: add other pointer-type values here if you have any
+            // e.g.: ctx->GetValue<SomePtr>("some key")->Set(nullptr);
+        }
+    }
+}
 
 class BotInitGuard
 {
@@ -124,7 +142,7 @@ void PlayerbotHolder::AddPlayerBot(ObjectGuid playerGuid, uint32 masterAccountId
         PlayerbotMgr* mgr = GET_PLAYERBOT_MGR(masterPlayer);
         if (!mgr)
         {
-            LOG_DEBUG("playerbots", "PlayerbotMgr not found for master player with GUID: {}", masterPlayer->GetGUID().GetRawValue());
+            LOG_DEBUG("mod-playerbots", "PlayerbotMgr not found for master player with GUID: {}", masterPlayer->GetGUID().GetRawValue());
             return;
         }
         uint32 count = mgr->GetPlayerbotsCount() + botLoading.size();
@@ -222,13 +240,33 @@ void PlayerbotHolder::UpdateSessions()
     }
 }
 
-void PlayerbotHolder::HandleBotPackets(WorldSession* session)
+/*void PlayerbotHolder::HandleBotPackets(WorldSession* session)
 {
     WorldPacket* packet;
     while (session->GetPacketQueue().next(packet))
     {
         OpcodeClient opcode = static_cast<OpcodeClient>(packet->GetOpcode());
         ClientOpcodeHandler const* opHandle = opcodeTable[opcode];
+        opHandle->Call(session, *packet);
+        delete packet;
+    }
+}*/
+
+void PlayerbotHolder::HandleBotPackets(WorldSession* session) // [Crash Fix] Secure packet dispatch (avoid calling on a null handler)
+{
+    WorldPacket* packet;
+    while (session->GetPacketQueue().next(packet))
+    {
+        const OpcodeClient opcode = static_cast<OpcodeClient>(packet->GetOpcode());
+        const ClientOpcodeHandler* opHandle = opcodeTable[opcode];
+
+        if (!opHandle)
+        {
+            // Unknown handler: drop cleanly
+            delete packet;
+            continue;
+        }
+
         opHandle->Call(session, *packet);
         delete packet;
     }
@@ -318,10 +356,13 @@ void PlayerbotHolder::LogoutPlayerBot(ObjectGuid guid)
             sPlayerbotDbStore->Save(botAI);
         }
 
-        LOG_DEBUG("playerbots", "Bot {} logging out", bot->GetName().c_str());
+        LOG_DEBUG("mod-playerbots", "Bot {} logging out", bot->GetName().c_str());
         bot->SaveToDB(false, false);
 
-        WorldSession* botWorldSessionPtr = bot->GetSession();
+        // WorldSession* botWorldSessionPtr = bot->GetSession();
+		WorldSession* botWorldSessionPtr = bot->GetSession(); // Small safeguard on the session (as a precaution)
+        if (!botWorldSessionPtr)
+            return;
         WorldSession* masterWorldSessionPtr = nullptr;
 
         if (botWorldSessionPtr->isLogingOut())
@@ -354,11 +395,13 @@ void PlayerbotHolder::LogoutPlayerBot(ObjectGuid guid)
             logout = true;
         }
 
-        TravelTarget* target = nullptr;
+        /*TravelTarget* target = nullptr;
         if (botAI->GetAiObjectContext())  // Maybe some day re-write to delate all pointer values.
         {
             target = botAI->GetAiObjectContext()->GetValue<TravelTarget*>("travel target")->Get();
-        }
+        }*/
+        // [Crash fix] Centralized cleanup of pointer values in the context
+        ClearAIContextPointerValues(botAI);
 
         // Peiru: Allow bots to always instant logout to see if this resolves logout crashes
         logout = true;
@@ -375,19 +418,25 @@ void PlayerbotHolder::LogoutPlayerBot(ObjectGuid guid)
                 botWorldSessionPtr->HandleLogoutRequestOpcode(data);
                 if (!bot)
                 {
-                    RemoveFromPlayerbotsMap(guid);
+                    /*RemoveFromPlayerbotsMap(guid);
                     delete botWorldSessionPtr;
                     if (target)
-                        delete target;
+                        delete target;*/
+					// [Crash fix] bot can be destroyed by the logout request: clean up without touching old pointers
+                    RemoveFromPlayerbotsMap(guid);
+                    delete botWorldSessionPtr;
                 }
                 return;
             }
             else
             {
-                RemoveFromPlayerbotsMap(guid);     // deletes bot player ptr inside this WorldSession PlayerBotMap
+                /*RemoveFromPlayerbotsMap(guid);     // deletes bot player ptr inside this WorldSession PlayerBotMap
                 delete botWorldSessionPtr;  // finally delete the bot's WorldSession
                 if (target)
-                    delete target;
+                    delete target;*/
+				// [Crash fix] no more deleting 'target' here: ownership handled by the AI/Context
+                RemoveFromPlayerbotsMap(guid);     // deletes bot player ptr inside this WorldSession PlayerBotMap
+                delete botWorldSessionPtr;         // finally delete the bot's WorldSession
             }
             return;
         }  // if instant logout possible, do it
@@ -420,11 +469,11 @@ void PlayerbotHolder::DisablePlayerBot(ObjectGuid guid)
             sPlayerbotDbStore->Save(botAI);
         }
 
-        LOG_DEBUG("playerbots", "Bot {} logged out", bot->GetName().c_str());
+        LOG_DEBUG("mod-playerbots", "Bot {} logged out", bot->GetName().c_str());
 
         bot->SaveToDB(false, false);
 
-        if (botAI->GetAiObjectContext())  // Maybe some day re-write to delate all pointer values.
+        /*if (botAI->GetAiObjectContext())  // Maybe some day re-write to delate all pointer values.
         {
             TravelTarget* target = botAI->GetAiObjectContext()->GetValue<TravelTarget*>("travel target")->Get();
             if (target)
@@ -433,7 +482,9 @@ void PlayerbotHolder::DisablePlayerBot(ObjectGuid guid)
 
         RemoveFromPlayerbotsMap(guid);  // deletes bot player ptr inside this WorldSession PlayerBotMap
 
-        delete botAI;
+        delete botAI;*/
+        // [Crash fix] Centralized cleanup of pointer values in the context
+        ClearAIContextPointerValues(botAI);
     }
 }
 
@@ -564,7 +615,7 @@ void PlayerbotHolder::OnBotLogin(Player* const bot)
             //}
             mgroup->AddMember(bot);
 
-            LOG_DEBUG("playerbots", "[GROUP] after add: members={}, isRaid={}, isLFG={}",
+            LOG_DEBUG("mod-playerbots", "[GROUP] after add: members={}, isRaid={}, isLFG={}",
                       (int)mgroup->GetMembersCount(), mgroup->isRaidGroup() ? 1 : 0, mgroup->isLFGGroup() ? 1 : 0);
         }
         else
@@ -744,9 +795,11 @@ std::string const PlayerbotHolder::ProcessBotCommand(std::string const cmd, Obje
         }
     }
 
-    if (GET_PLAYERBOT_AI(bot))
+    // if (GET_PLAYERBOT_AI(bot))
+    if (PlayerbotAI* ai = GET_PLAYERBOT_AI(bot)) // [Tidy/Crash fix] Acquire AI once and reuse; avoid multiple GET_PLAYERBOT_AI calls.
     {
-        if (Player* master = GET_PLAYERBOT_AI(bot)->GetMaster())
+        // if (Player* master = GET_PLAYERBOT_AI(bot)->GetMaster())
+        if (Player* master = ai->GetMaster())
         {
             if (master->GetSession()->GetSecurity() <= SEC_PLAYER && sPlayerbotAIConfig->autoInitOnly &&
                 cmd != "init=auto")
@@ -1601,7 +1654,7 @@ void PlayerbotMgr::OnBotLoginInternal(Player* const bot)
     botAI->SetMaster(master);
     botAI->ResetStrategies();
 
-    LOG_INFO("playerbots", "Bot {} logged in", bot->GetName().c_str());
+    LOG_INFO("mod-playerbots", "Bot {} logged in", bot->GetName().c_str());
 }
 
 void PlayerbotMgr::OnPlayerLogin(Player* player)
@@ -1794,7 +1847,7 @@ void PlayerbotsMgr::RemovePlayerbotAI(ObjectGuid const& guid, bool removeMgrEntr
     {
         delete it->second;
         _playerbotsAIMap.erase(it);
-        LOG_DEBUG("playerbots", "Removed stale AI for GUID {}",
+        LOG_DEBUG("mod-playerbots", "Removed stale AI for GUID {}",
                   static_cast<uint64>(guid.GetRawValue()));
     }
 

src/Playerbots.cpp

@@ -137,12 +137,21 @@ public:
 
     bool OnPlayerCanUseChat(Player* player, uint32 type, uint32 /*lang*/, std::string& msg, Player* receiver) override
     {
-        if (type == CHAT_MSG_WHISPER)
+        /*if (type == CHAT_MSG_WHISPER)
         {
             if (PlayerbotAI* botAI = GET_PLAYERBOT_AI(receiver))
             {
                 botAI->HandleCommand(type, msg, player);
 
+                return false;
+            }
+        }*/
+		
+       if (type == CHAT_MSG_WHISPER && receiver) // [Crash Fix] Add non-null receiver check to avoid calling on a null pointer in edge cases.
+       {
+           if (PlayerbotAI* botAI = GET_PLAYERBOT_AI(receiver))
+           {
+               botAI->HandleCommand(type, msg, player);
                return false;
            }
        }
@@ -152,7 +161,7 @@ public:
 
     void OnPlayerChat(Player* player, uint32 type, uint32 /*lang*/, std::string& msg, Group* group) override
     {
-        for (GroupReference* itr = group->GetFirstMember(); itr != nullptr; itr = itr->next())
+        /*for (GroupReference* itr = group->GetFirstMember(); itr != nullptr; itr = itr->next())
         {
             if (Player* member = itr->GetSource())
             {
@@ -161,6 +170,18 @@ public:
                     botAI->HandleCommand(type, msg, player);
                 }
             }
+        }*/
+		if (!group) return; // [Crash Fix] 'group' should not be null in this hook, but this safeguard prevents a crash if the caller changes or in case of an unexpected call.
+
+        for (GroupReference* itr = group->GetFirstMember(); itr != nullptr; itr = itr->next())
+        {
+            Player* member = itr->GetSource();
+            if (!member) continue;
+        
+            if (PlayerbotAI* botAI = GET_PLAYERBOT_AI(member))
+            {
+                botAI->HandleCommand(type, msg, player);
+            }
         }
     }
 
@@ -177,7 +198,9 @@ public:
                     {
                         if (bot->GetGuildId() == player->GetGuildId())
                         {
-                            GET_PLAYERBOT_AI(bot)->HandleCommand(type, msg, player);
+                            // GET_PLAYERBOT_AI(bot)->HandleCommand(type, msg, player);
+							if (PlayerbotAI* ai = GET_PLAYERBOT_AI(bot))  // [Crash Fix] Possible crash source because we don't check if the returned pointer is not null
+                                ai->HandleCommand(type, msg, player);
                         }
                     }
                 }

src/RandomPlayerbotMgr.cpp

@@ -1725,7 +1725,11 @@ void RandomPlayerbotMgr::RandomTeleport(Player* bot, std::vector<WorldLocation>&
         }
 
         // Prevent blink to be detected by visible real players
-        if (botAI->HasPlayerNearby(150.0f))
+        /*if (botAI->HasPlayerNearby(150.0f))
+        {
+            break;
+        }*/
+        if (botAI && botAI->HasPlayerNearby(150.0f)) // [Crash fix] 'botAI' can be null earlier in the function.
         {
             break;
         }
@@ -2333,8 +2337,10 @@ void RandomPlayerbotMgr::RandomizeFirst(Player* bot)
     PlayerbotsDatabase.Execute(stmt);
 
     // teleport to a random inn for bot level
-    if (GET_PLAYERBOT_AI(bot))
-        GET_PLAYERBOT_AI(bot)->Reset(true);
+    /*if (GET_PLAYERBOT_AI(bot))
+        GET_PLAYERBOT_AI(bot)->Reset(true);*/
+    if (auto* ai = GET_PLAYERBOT_AI(bot)) // [Crash fix] Avoid 2 calls to GET_PLAYERBOT_AI and protect the dereference.
+        ai->Reset(true);
 
     if (bot->GetGroup())
         bot->RemoveFromGroup();
@@ -2374,8 +2380,10 @@ void RandomPlayerbotMgr::RandomizeMin(Player* bot)
     PlayerbotsDatabase.Execute(stmt);
 
     // teleport to a random inn for bot level
-    if (GET_PLAYERBOT_AI(bot))
-        GET_PLAYERBOT_AI(bot)->Reset(true);
+    /*if (GET_PLAYERBOT_AI(bot))
+        GET_PLAYERBOT_AI(bot)->Reset(true);*/
+	if (auto* ai = GET_PLAYERBOT_AI(bot)) // [Crash fix] Avoid 2 calls to GET_PLAYERBOT_AI and protect the dereference.
+    ai->Reset(true);
 
     if (bot->GetGroup())
         bot->RemoveFromGroup();
@@ -2468,7 +2476,7 @@ void RandomPlayerbotMgr::Refresh(Player* bot)
 
 bool RandomPlayerbotMgr::IsRandomBot(Player* bot)
 {
-    if (bot && GET_PLAYERBOT_AI(bot))
+    /*if (bot && GET_PLAYERBOT_AI(bot))
     {
         if (GET_PLAYERBOT_AI(bot)->IsRealPlayer())
             return false;
@@ -2478,6 +2486,17 @@ bool RandomPlayerbotMgr::IsRandomBot(Player* bot)
         return IsRandomBot(bot->GetGUID().GetCounter());
     }
 
+    return false;*/
+
+    if (bot) // [Tidy] Single AI acquisition + same logic.
+    {
+        if (auto* ai = GET_PLAYERBOT_AI(bot))
+        {
+            if (ai->IsRealPlayer())
+                return false;
+        }
+        return IsRandomBot(bot->GetGUID().GetCounter());
+    }
     return false;
 }
 
@@ -2495,7 +2514,7 @@ bool RandomPlayerbotMgr::IsRandomBot(ObjectGuid::LowType bot)
 
 bool RandomPlayerbotMgr::IsAddclassBot(Player* bot)
 {
-    if (bot && GET_PLAYERBOT_AI(bot))
+    /*if (bot && GET_PLAYERBOT_AI(bot))
     {
         if (GET_PLAYERBOT_AI(bot)->IsRealPlayer())
             return false;
@@ -2505,6 +2524,17 @@ bool RandomPlayerbotMgr::IsAddclassBot(Player* bot)
         return IsAddclassBot(bot->GetGUID().GetCounter());
     }
 
+    return false;*/
+
+    if (bot) // [Tidy] Single AI acquisition + same logic.
+    {
+        if (auto* ai = GET_PLAYERBOT_AI(bot))
+        {
+            if (ai->IsRealPlayer())
+                return false;
+        }
+        return IsAddclassBot(bot->GetGUID().GetCounter());
+    }
     return false;
 }
 
@@ -2844,8 +2874,9 @@ void RandomPlayerbotMgr::HandleCommand(uint32 type, std::string const text, Play
                     continue;
             }
         }
-
-        GET_PLAYERBOT_AI(bot)->HandleCommand(type, text, fromPlayer);
+        // GET_PLAYERBOT_AI(bot)->HandleCommand(type, text, fromPlayer); // Possible crash source because we don't check if the returned pointer is not null
+        if (auto* ai = GET_PLAYERBOT_AI(bot)) // [Crash fix] Protect the call on a null AI (World/General chat path).
+            ai->HandleCommand(type, text, fromPlayer);
     }
 }
 
@@ -2918,7 +2949,7 @@ void RandomPlayerbotMgr::OnPlayerLogin(Player* player)
         for (GroupReference* gref = group->GetFirstMember(); gref; gref = gref->next())
         {
             Player* member = gref->GetSource();
-            PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
+            /*PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
             if (botAI && member == player && (!botAI->GetMaster() || GET_PLAYERBOT_AI(botAI->GetMaster())))
             {
                 if (!bot->InBattleground())
@@ -2929,6 +2960,20 @@ void RandomPlayerbotMgr::OnPlayerLogin(Player* player)
                 }
 
                 break;
+            }*/
+			if (auto* botAI = GET_PLAYERBOT_AI(bot)) // [Tidy] Avoid GET_PLAYERBOT_AI(...) on a potentially null master.
+            {
+                Player* master = botAI->GetMaster();
+                if (member == player && (!master || GET_PLAYERBOT_AI(master)))
+                {
+                    if (!bot->InBattleground())
+                    {
+                        botAI->SetMaster(player);
+                        botAI->ResetStrategies();
+                        botAI->TellMaster("Hello");
+                    }
+                    break;
+                }
             }
         }
     }
@@ -3067,12 +3112,28 @@ void RandomPlayerbotMgr::PrintStats()
         lvlPerClass[bot->getClass()] += bot->GetLevel();
         lvlPerRace[bot->getRace()] += bot->GetLevel();
 
-        PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
+        /*PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
         if (botAI->AllowActivity())
             ++active;
 
         if (botAI->GetAiObjectContext()->GetValue<bool>("random bot update")->Get())
+            ++update;*/
+		
+        PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot); // [Crash fix] Declare botAI in the loop scope and exit early if null,
+        if (!botAI)
+            continue;  // real player / no AI → ignore this bot for stats
+        
+        if (botAI->AllowActivity())
+            ++active;
+        
+        // Secure access to the context and the value
+        if (AiObjectContext* ctx = botAI->GetAiObjectContext())
+        {
+            if (auto* v = ctx->GetValue<bool>("random bot update"))
+                if (v->Get())
                     ++update;
+        } 
+        // End CrashFix
 		
         uint32 botId = bot->GetGUID().GetCounter();
         if (!GetEventValue(botId, "randomize"))

src/TravelMgr.cpp

@@ -1227,7 +1227,7 @@ std::string const QuestObjectiveTravelDestination::getTitle()
     return out.str();
 }
 
-bool RpgTravelDestination::isActive(Player* bot)
+/*bool RpgTravelDestination::isActive(Player* bot) // Old Code
 {
     PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
     AiObjectContext* context = botAI->GetAiObjectContext();
@@ -1264,6 +1264,62 @@ bool RpgTravelDestination::isActive(Player* bot)
     ReputationRank reaction = bot->GetReputationRank(factionEntry->faction);
 
     return reaction > REP_NEUTRAL;
+}*/
+
+bool RpgTravelDestination::isActive(Player* bot)
+{
+    // [Crash fix] Never dereference the AI if the player is real (null AI).
+    if (!bot)
+        return false;
+
+    PlayerbotAI* botAI = GET_PLAYERBOT_AI(bot);
+    if (!botAI)
+        return false; // real player (no AI) => inactive destination
+
+    AiObjectContext* context = botAI->GetAiObjectContext();
+    if (!context)
+        return false;
+
+    CreatureTemplate const* cInfo = GetCreatureTemplate();
+    if (!cInfo)
+        return false;
+
+    bool isUsefull = false;
+
+    if (cInfo->npcflag & UNIT_NPC_FLAG_VENDOR)
+        if (AI_VALUE2_LAZY(bool, "group or", "should sell,can sell,following party,near leader"))
+            isUsefull = true;
+
+    if (cInfo->npcflag & UNIT_NPC_FLAG_REPAIR)
+        if (AI_VALUE2_LAZY(bool, "group or", "should repair,can repair,following party,near leader"))
+            isUsefull = true;
+
+    if (!isUsefull)
+        return false;
+
+    // [Crash fix] Read the ignore list via 'context' and check that the Value exists
+    GuidSet const* ignoreList = nullptr;
+    if (auto* value = context->GetValue<GuidSet&>("ignore rpg target"))
+        ignoreList = &value->Get();
+
+    if (ignoreList)
+    {
+        for (ObjectGuid const& guid : *ignoreList)
+        {
+            if (guid.GetEntry() == getEntry())
+                return false;
+        }
+    }
+
+    // Secure access to the faction template
+    if (FactionTemplateEntry const* factionEntry = sFactionTemplateStore.LookupEntry(cInfo->faction))
+    {
+        ReputationRank reaction = bot->GetReputationRank(factionEntry->faction);
+        return reaction > REP_NEUTRAL;
+    }
+
+    // As a precaution, if the faction is not found, consider inactive
+    return false;
 }
 
 CreatureTemplate const* RpgTravelDestination::GetCreatureTemplate() { return sObjectMgr->GetCreatureTemplate(entry); }