From 35bb11a0dec5fedbcb6fb79ca57a56c6f0fb5a85 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Fri, 30 Oct 2026 10:24:19 +0000
Subject: [PATCH] Decompile fn_21601 (ReceiveShortcutPage)

Batch #5330 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_21601 ReceiveShortcutPage: logic confirmed by peer review

Peer-reviewed-by: alisonrag, sherollyner, tayoba
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Client/Mode/CGameMode.h         |  6 ++
 Source/Client/Mode/GameModeNotices.cpp | 80 ++++++++++++++++++++++++++
 Source/Client/Session.h                |  8 ++-
 3 files changed, 91 insertions(+), 3 deletions(-)

diff --git a/Source/Client/Mode/CGameMode.h b/Source/Client/Mode/CGameMode.h
index 747f6d88..d490934c 100644
--- a/Source/Client/Mode/CGameMode.h
+++ b/Source/Client/Mode/CGameMode.h
@@ -204,6 +204,12 @@ public:
   void ReceivePartyItemPickup(const unsigned char* packet);
   void NotifyResult3995(unsigned char result);
   void ReceiveActorEffect228(const unsigned char* packet);
+  void ResendMinimapMarkers();
+  void ReceiveJobTitle(unsigned char result, int job);
+  void ReceiveQuestStates(int count, const unsigned char* entries);
+  void ReceiveMessageBox(const unsigned char* packet);
+  void NotifyCaptchaRegistered();
+  void ReceiveItem1784List(const unsigned char* packet);
 };
 
 #if defined(_WIN32) && !defined(_WIN64)
diff --git a/Source/Client/Mode/GameModeNotices.cpp b/Source/Client/Mode/GameModeNotices.cpp
index f3317fe2..cac009a5 100644
--- a/Source/Client/Mode/GameModeNotices.cpp
+++ b/Source/Client/Mode/GameModeNotices.cpp
@@ -17,16 +17,21 @@
 #include "Contents/Items/ItemDescription.h"
 #include "Contents/Items/ItemInfo.h"
 #include "Contents/Items/ItemNaming.h"
+#include "Contents/Jobs/JobInheritance.h"
 #include "Contents/MessageTable.h"
 #include "Contents/Messenger/ClientMessenger.h"
 #include "Contents/PlayerNameDictionary.h"
+#include "Contents/RenewQuestMgr.h"
 #include "Contents/RodexMailStore.h"
 #include "Contents/RouletteMgr.h"
 #include "Contents/World/World.h"
 #include "Render/Renderer.h"
+#include "UI/AdventureGuide/UIAdventureGuide.h"
+#include "UI/UICaptchaRegisterWnd.h"
 #include "UI/UIGradeEnchantWnd.h"
 #include "UI/Window/UIWindow.h"
 #include "UI/Window/UIWindowMgr.h"
+#include "UI/Window/WindowDialogs.h"
 #include "Utility/Text/FormatString.h"
 
 #include <cstdint>
@@ -788,3 +793,78 @@ void CGameMode::ReceiveGuildUnknown0114List(const unsigned char* packet) {
     guildInfo->AddUnknown0114(value);
   }
 }
+
+#pragma pack(push, 1)
+struct ShortcutPagePayload {
+  /* 0000 */ NormalItemSlot slots[36];
+  /* 00FC */ NormalItemSlot slot06EB;
+  /* 0103 */ NormalItemSlot slot06F2;
+};
+
+struct QuestStateEntry {
+  /* 0000 */ unsigned int questId;
+  /* 0004 */ unsigned char state;
+};
+
+struct MessageBoxPacket {
+  /* 0000 */ std::int16_t id;
+  /* 0002 */ std::uint16_t captionId;
+  /* 0004 */ int captionArgument;
+  /* 0008 */ std::uint16_t textId;
+  /* 000A */ int textArgument;
+};
+
+struct Item1784Entry {
+  /* 0000 */ int itemId;
+  /* 0004 */ int quantity;
+  /* 0008 */ std::uint32_t unknown_0008;
+  /* 000C */ std::uint32_t unknown_000C;
+  /* 0010 */ std::uint32_t unknown_0010;
+  /* 0014 */ std::uint32_t unknown_0014;
+};
+
+struct Item1784ListPacket {
+  /* 0000 */ std::int16_t id;
+  /* 0002 */ std::int16_t length;
+  /* 0004 */ std::int16_t flag;
+  /* 0006 */ Item1784Entry entries[1];
+};
+#pragma pack(pop)
+
+struct ClientItemLists {
+  void ClearItems1784(int index);
+};
+
+// OFFSET: 0x00D18BD0
+// FUNCTION: fn_21601
+void ReceiveShortcutPage(int position, const ShortcutPagePayload* payload, std::int16_t bank) {
+  int base = 0;
+  if (bank == 0) {
+    g_session.ClearShortcutSlots();
+    memcpy_s(g_session.m_shortcutSlots, sizeof(g_session.m_shortcutSlots), payload, sizeof(payload->slots));
+    g_session.ClearSlots06EB();
+    g_session.unknown_06EB = payload->slot06EB;
+    g_session.unknown_06F2 = payload->slot06F2;
+    base = g_session.unknown_06FC;
+  } else if (bank == 1) {
+    g_session.ClearSecondaryShortcutSlots();
+    memcpy_s(g_session.m_secondaryShortcutSlots, sizeof(g_session.m_secondaryShortcutSlots), payload, sizeof(payload->slots));
+    base = g_session.unknown_06A8;
+  }
+
+  if (g_windowMgr.window_01E8) {
+    g_windowMgr.window_01E8->SendMsg(nullptr, 143, position - base + 4, bank, 0, 0);
+  }
+}
+
+// OFFSET: 0x00D18F60
+
+// OFFSET: 0x00D69260
+
+// OFFSET: 0x00D694C0
+
+// OFFSET: 0x00D6E1E0
+
+// OFFSET: 0x00D6E5F0
+
+// OFFSET: 0x00D6ECB0
diff --git a/Source/Client/Session.h b/Source/Client/Session.h
index d341c00f..fb058652 100644
--- a/Source/Client/Session.h
+++ b/Source/Client/Session.h
@@ -100,11 +100,12 @@ public:
   /* 0420 */ std::uint32_t unknown_0420[36];
   /* 04B0 */ NormalItemSlot m_shortcutSlots[36];
   /* 05AC */ NormalItemSlot m_secondaryShortcutSlots[36];
-  /* 06A8 */ unsigned char unknown_06A8[0x04];
+  /* 06A8 */ int unknown_06A8;
   /* 06AC */ NormalItemSlot m_normalItemSlots[9];
   /* 06EB */ NormalItemSlot unknown_06EB;
   /* 06F2 */ NormalItemSlot unknown_06F2;
-  /* 06F9 */ unsigned char unknown_06F9[0x07];
+  /* 06F9 */ unsigned char unknown_06F9[0x03];
+  /* 06FC */ int unknown_06FC;
   /* 0700 */ std::map<int, int> unknown_0700;
   /* 0708 */ std::map<int, int> unknown_0708;
   /* 0710 */ unsigned char unknown_0710[0x0C];
@@ -298,7 +299,8 @@ public:
   /* 6150 */ std::int16_t unknown_6150;
   /* 6154 */ int unknown_6154;
   /* 6158 */ int unknown_6158;
-  /* 615C */ unsigned char unknown_615C[0x10];
+  /* 615C */ int unknown_615C;
+  /* 6160 */ unsigned char unknown_6160[0x0C];
   /* 616C */ std::vector<int> unknown_616C;
   /* 6178 */ std::vector<SessionRecord6178> unknown_6178;
   /* 6184 */ unsigned char unknown_6184[0x04];