Harden melee sync authority

src/game/input_main.cpp

@@ -1580,12 +1580,35 @@ void CInputMain::Move(LPCHARACTER ch, const char * data)
 	//	FUNC_SKILL = 0x80,
 	//};  
 
+	const float fDist = DISTANCE_SQRT((ch->GetX() - pinfo->lX) / 100, (ch->GetY() - pinfo->lY) / 100);
+
+	if (ch->IsPC() && ch->IsSyncOwnerLocked() && ch->GetSyncOwner() && ch->GetSyncOwner() != ch && fDist > 2.5f)
+	{
+		char szDetail[192];
+		snprintf(szDetail,
+			 sizeof(szDetail),
+			 "func=%u dist=%.1f owner=%s cur=(%ld,%ld) dst=(%ld,%ld)",
+			 pinfo->bFunc,
+			 fDist,
+			 ch->GetSyncOwner()->GetName(),
+			 static_cast<long>(ch->GetX()),
+			 static_cast<long>(ch->GetY()),
+			 static_cast<long>(pinfo->lX),
+			 static_cast<long>(pinfo->lY));
+		if (fDist > 8.0f)
+			ch->RecordAntiCheatViolation("SYNC_LOCK_MOVE", 8, szDetail, true);
+		else
+			sys_log(1, "SYNC_LOCK_MOVE: %s %s", ch->GetName(), szDetail);
+
+		ch->Show(ch->GetMapIndex(), ch->GetX(), ch->GetY(), ch->GetZ());
+		ch->Stop();
+		return;
+	}
+
 	// 텔레포트 핵 체크
 
 //	if (!test_server)	//2012.05.15 김용욱 : 테섭에서 (무적상태로) 다수 몬스터 상대로 다운되면서 공격시 콤보핵으로 죽는 문제가 있었다.
 	{
-		const float fDist = DISTANCE_SQRT((ch->GetX() - pinfo->lX) / 100, (ch->GetY() - pinfo->lY) / 100);
-
 		if (((false == ch->IsRiding() && fDist > 25) || fDist > 40) && OXEVENT_MAP_INDEX != ch->GetMapIndex())
 		{
 			char szDetail[160];
@@ -1916,6 +1939,21 @@ int CInputMain::SyncPosition(LPCHARACTER ch, const char * c_pcData, size_t uiByt
 				continue;
 		}
 
+		if (victim->IsSyncOwnerLocked() && !victim->IsSyncOwnerLockedFor(ch))
+		{
+			char szDetail[192];
+			snprintf(szDetail,
+				 sizeof(szDetail),
+				 "victim=%s owner=%s requester=%s sync=(%ld,%ld)",
+				 victim->GetName(),
+				 victim->GetSyncOwner() ? victim->GetSyncOwner()->GetName() : "-",
+				 ch->GetName(),
+				 static_cast<long>(e->lX),
+				 static_cast<long>(e->lY));
+			ch->RecordAntiCheatViolation("SYNC_OWNER_STEAL", 4, szDetail);
+			continue;
+		}
+
 		// 소유권 검사
 		if (!victim->SetSyncOwner(ch))
 			continue;