Add support for changed item id size in packets.

From some packet version hercules support item id fields as int32.

36 files changed, 220 insertions, 129 deletions

diff --git a/src/net/ea/inventoryrecv.cpp b/src/net/ea/inventoryrecv.cpp
index 3bae51555..5dd4075d6 100644
--- a/src/net/ea/inventoryrecv.cpp
+++ b/src/net/ea/inventoryrecv.cpp
@@ -63,7 +63,7 @@ void InventoryRecv::processPlayerInventoryUse(Net::MessageIn &msg)
         ? PlayerInfo::getInventory() : nullptr;
 
     const int index = msg.readInt16("index") - INVENTORY_OFFSET;
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     msg.readInt32("id?");
     const int amount = msg.readInt16("amount");
     msg.readUInt8("type");
diff --git a/src/net/eathena/auctionrecv.cpp b/src/net/eathena/auctionrecv.cpp
index eed21a5e2..3f91d89a8 100644
--- a/src/net/eathena/auctionrecv.cpp
+++ b/src/net/eathena/auctionrecv.cpp
@@ -47,14 +47,14 @@ void AuctionRecv::processAuctionResults(Net::MessageIn &msg)
     {
         msg.readInt32("auction id");
         msg.readString(24, "seller name");
-        msg.readInt32("item id");
+        msg.readInt16("item id");  // here item always 16 bit
         msg.readInt32("auction type");
         msg.readInt16("item amount");  // always 1
         msg.readUInt8("identify");
         msg.readUInt8("attribute");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            msg.readUInt16("card");
+            msg.readUInt16("card");  // here item always 16 bit
         msg.readInt32("price");
         msg.readInt32("buy now");
         msg.readString(24, "buyer name");
diff --git a/src/net/eathena/beingrecv.cpp b/src/net/eathena/beingrecv.cpp
index 440fb5971..56cf4d35c 100644
--- a/src/net/eathena/beingrecv.cpp
+++ b/src/net/eathena/beingrecv.cpp
@@ -74,6 +74,7 @@ extern Window *deathNotice;
 extern bool packets_re;
 extern bool packets_main;
 extern bool packets_zero;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -248,7 +249,7 @@ void BeingRecv::processBeingChangeLookCards(Net::MessageIn &msg)
         id2 = 1;
 
     for (int f = 0; f < maxCards; f ++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readUInt16("card");  // +++ probably need use int32
 
     if (dstBeing == nullptr)
         return;
@@ -500,9 +501,14 @@ void BeingRecv::processBeingVisible(Net::MessageIn &msg)
     const int hairStyle = msg.readInt16("hair style");
     uint32_t weapon;
     if (msg.getVersion() >= 7)
-        weapon = CAST_U32(msg.readInt32("weapon"));
+    {
+        weapon = msg.readItemId("weapon");
+        msg.readItemId("shield");
+    }
     else
+    {
         weapon = CAST_U32(msg.readInt16("weapon"));
+    }
     const uint16_t headBottom = msg.readInt16("head bottom");
     if (msg.getVersion() < 7)
         msg.readInt16("shield");
@@ -689,9 +695,14 @@ void BeingRecv::processBeingMove(Net::MessageIn &msg)
     const int hairStyle = msg.readInt16("hair style");
     uint32_t weapon;
     if (msg.getVersion() >= 7)
-        weapon = CAST_U32(msg.readInt32("weapon"));
+    {
+        weapon = msg.readItemId("weapon");
+        msg.readItemId("shield");
+    }
     else
+    {
         weapon = CAST_U32(msg.readInt16("weapon"));
+    }
     const uint16_t headBottom = msg.readInt16("head bottom");
     msg.readInt32("tick");
     if (msg.getVersion() < 7)
@@ -883,9 +894,14 @@ void BeingRecv::processBeingSpawn(Net::MessageIn &msg)
     const int hairStyle = msg.readInt16("hair style");
     uint32_t weapon;
     if (msg.getVersion() >= 7)
-        weapon = CAST_U32(msg.readInt32("weapon"));
+    {
+        weapon = msg.readItemId("weapon");
+        msg.readItemId("shield");
+    }
     else
+    {
         weapon = CAST_U32(msg.readInt16("weapon"));
+    }
     const uint16_t headBottom = msg.readInt16("head bottom");
     if (msg.getVersion() < 7)
         msg.readInt16("shield");
@@ -1963,7 +1979,7 @@ void BeingRecv::processBeingViewEquipment(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 45) / 31;
+    const int count = (msg.readInt16("len") - 45) / (21 + itemIdLen * 5);
     msg.readString(24, "name");
     msg.readInt16("job");
     msg.readInt16("head");
@@ -1978,13 +1994,13 @@ void BeingRecv::processBeingViewEquipment(Net::MessageIn &msg)
     for (int f = 0; f < count; f ++)
     {
         msg.readInt16("index");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readUInt8("item type");
         msg.readInt32("location");
         msg.readInt32("wear state");
         msg.readInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            msg.readUInt16("card");
+            msg.readItemId("card");
         msg.readInt32("hire expire date (?)");
         msg.readInt16("equip type");
         msg.readInt16("item sprite number");
diff --git a/src/net/eathena/buyingstorehandler.cpp b/src/net/eathena/buyingstorehandler.cpp
index 44a63a658..3a5bfb9d3 100644
--- a/src/net/eathena/buyingstorehandler.cpp
+++ b/src/net/eathena/buyingstorehandler.cpp
@@ -35,6 +35,7 @@
 #include "debug.h"
 
 extern int packetVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -57,14 +58,14 @@ void BuyingStoreHandler::create(const std::string &name,
     if (packetVersion < 20100303)
         return;
     createOutPacket(CMSG_BUYINGSTORE_CREATE);
-    outMsg.writeInt16(CAST_S16(89 + items.size() * 8), "len");
+    outMsg.writeInt16(CAST_S16(89 + items.size() * (6 + itemIdLen)), "len");
     outMsg.writeInt32(maxMoney, "limit money");
     outMsg.writeInt8(static_cast<int8_t>(flag), "flag");
     outMsg.writeString(name, 80, "store name");
     FOR_EACH (STD_VECTOR<ShopItem*>::const_iterator, it, items)
     {
         const ShopItem *const item = *it;
-        outMsg.writeInt16(CAST_S16(item->getId()), "item id");
+        outMsg.writeItemId(item->getId(), "item id");
         outMsg.writeInt16(CAST_S16(item->getQuantity()), "amount");
         outMsg.writeInt32(item->getPrice(), "price");
     }
@@ -105,7 +106,7 @@ void BuyingStoreHandler::sell(const Being *const being,
     outMsg.writeInt16(CAST_S16(
         item->getInvIndex() + INVENTORY_OFFSET),
         "index");
-    outMsg.writeInt16(CAST_S16(item->getId()), "item id");
+    outMsg.writeItemId(item->getId(), "item id");
     outMsg.writeInt16(CAST_S16(amount), "amount");
 }
 
diff --git a/src/net/eathena/buyingstorerecv.cpp b/src/net/eathena/buyingstorerecv.cpp
index 90766686a..5f35172e5 100644
--- a/src/net/eathena/buyingstorerecv.cpp
+++ b/src/net/eathena/buyingstorerecv.cpp
@@ -46,6 +46,8 @@
 
 #include "debug.h"
 
+extern int itemIdLen;
+
 namespace EAthena
 {
 
@@ -77,7 +79,7 @@ void BuyingStoreRecv::processBuyingStoreCreateFailed(Net::MessageIn &msg)
 
 void BuyingStoreRecv::processBuyingStoreOwnItems(Net::MessageIn &msg)
 {
-    const int count = (msg.readInt16("len") - 12) / 9;
+    const int count = (msg.readInt16("len") - 12) / (7 + itemIdLen);
     msg.readBeingId("account id");
     msg.readInt32("money limit");
     for (int f = 0; f < count; f ++)
@@ -85,7 +87,7 @@ void BuyingStoreRecv::processBuyingStoreOwnItems(Net::MessageIn &msg)
         msg.readInt32("price");
         msg.readInt16("amount");
         msg.readUInt8("item type");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
     }
     PlayerInfo::enableVending(true);
     BuyingStoreModeListener::distributeEvent(true);
@@ -126,7 +128,7 @@ void BuyingStoreRecv::processBuyingStoreItemsList(Net::MessageIn &msg)
 {
     if (actorManager == nullptr)
         return;
-    const int count = (msg.readInt16("len") - 16) / 9;
+    const int count = (msg.readInt16("len") - 16) / (7 + itemIdLen);
     const BeingId id = msg.readBeingId("account id");
     const int storeId = msg.readInt32("store id");
     // +++ in future need use it too
@@ -147,7 +149,7 @@ void BuyingStoreRecv::processBuyingStoreItemsList(Net::MessageIn &msg)
         const int amount = msg.readInt16("amount");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
 
         if (inv == nullptr)
             continue;
@@ -180,7 +182,7 @@ void BuyingStoreRecv::processBuyingStoreSellFailed(Net::MessageIn &msg)
 void BuyingStoreRecv::processBuyingStoreSellerSellFailed(Net::MessageIn &msg)
 {
     const int16_t result = msg.readInt16("result");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     switch (result)
     {
         case 5:
@@ -205,7 +207,7 @@ void BuyingStoreRecv::processBuyingStoreSellerSellFailed(Net::MessageIn &msg)
 void BuyingStoreRecv::processBuyingStoreReport(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     msg.readInt16("amount");
     if (msg.getVersion() >= 20141016)
     {
diff --git a/src/net/eathena/buysellrecv.cpp b/src/net/eathena/buysellrecv.cpp
index c49375fd3..9bb91520b 100644
--- a/src/net/eathena/buysellrecv.cpp
+++ b/src/net/eathena/buysellrecv.cpp
@@ -46,13 +46,15 @@
 
 #include "debug.h"
 
+extern int itemIdLen;
+
 namespace EAthena
 {
 
 void BuySellRecv::processNpcBuy(Net::MessageIn &msg)
 {
     msg.readInt16("len");
-    const int sz = 11;
+    const int sz = 9 + itemIdLen;
     const int n_items = (msg.getLength() - 4) / sz;
 
     const BeingTypeId npcId = NpcRecv::mNpcTypeId;
@@ -83,7 +85,7 @@ void BuySellRecv::processNpcBuy(Net::MessageIn &msg)
         msg.readInt32("dc value?");
         const ItemTypeT type = static_cast<ItemTypeT>(
             msg.readUInt8("type"));
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemColor color = ItemColor_one;
         Ea::BuySellRecv::mBuyDialog->addItem(itemId, type, color, 0, value);
     }
diff --git a/src/net/eathena/cashshophandler.cpp b/src/net/eathena/cashshophandler.cpp
index f6292c818..3585c4903 100644
--- a/src/net/eathena/cashshophandler.cpp
+++ b/src/net/eathena/cashshophandler.cpp
@@ -31,6 +31,7 @@
 #include "debug.h"
 
 extern int packetVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -55,11 +56,11 @@ void CashShopHandler::buyItem(const int points,
     if (packetVersion < 20101124)
         return;
     createOutPacket(CMSG_NPC_CASH_SHOP_BUY);
-    outMsg.writeInt16(10 + 4, "len");
+    outMsg.writeInt16(10 + (2 + itemIdLen), "len");
     outMsg.writeInt32(points, "points");
     outMsg.writeInt16(1, "count");
     outMsg.writeInt16(CAST_S16(amount), "amount");
-    outMsg.writeInt16(CAST_S16(itemId), "item id");
+    outMsg.writeItemId(itemId, "item id");
 }
 
 void CashShopHandler::buyItems(const int points,
@@ -69,7 +70,7 @@ void CashShopHandler::buyItems(const int points,
         return;
 
     int cnt = 0;
-    const int pairSize = 4;
+    const int pairSize = 2 + itemIdLen;
 
     FOR_EACH (STD_VECTOR<ShopItem*>::const_iterator, it, items)
     {
@@ -116,14 +117,14 @@ void CashShopHandler::buyItems(const int points,
             for (int f = 0; f < usedQuantity; f ++)
             {
                 outMsg.writeInt16(CAST_S16(1), "amount");
-                outMsg.writeInt16(CAST_S16(item->getId()),
+                outMsg.writeItemId(item->getId(),
                     "item id");
             }
         }
         else
         {
             outMsg.writeInt16(CAST_S16(usedQuantity), "amount");
-            outMsg.writeInt16(CAST_S16(item->getId()), "item id");
+            outMsg.writeItemId(item->getId(), "item id");
         }
     }
 }
diff --git a/src/net/eathena/cashshoprecv.cpp b/src/net/eathena/cashshoprecv.cpp
index 8190fd560..5d062175e 100644
--- a/src/net/eathena/cashshoprecv.cpp
+++ b/src/net/eathena/cashshoprecv.cpp
@@ -41,6 +41,7 @@
 #include "debug.h"
 
 extern int packetVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -53,10 +54,13 @@ namespace CashShopRecv
 void CashShopRecv::processCashShopOpen(Net::MessageIn &msg)
 {
     int count;
+    int blockSize = 11;
+    if (itemIdLen == 4)
+        blockSize += 2;
     if (packetVersion >= 20070711)
-        count = (msg.readInt16("len") - 12) / 11;
+        count = (msg.readInt16("len") - 12) / blockSize;
     else
-        count = (msg.readInt16("len") - 8) / 11;
+        count = (msg.readInt16("len") - 8) / blockSize;
 
     const BeingTypeId npcId = NpcRecv::mNpcTypeId;
     std::string currency;
@@ -88,7 +92,7 @@ void CashShopRecv::processCashShopOpen(Net::MessageIn &msg)
         const int value = msg.readInt32("discount price");
         const ItemTypeT type = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemColor color = ItemColor_one;
         mBuyDialog->addItem(itemId, type, color, 0, value);
     }
@@ -157,7 +161,7 @@ void CashShopRecv::processCashShopTabPriceList(Net::MessageIn &msg)
 
     for (int f = 0; f < count; f ++)
     {
-        msg.readInt16("item id");
+        msg.readInt16("item id");  // item id size always 16 bit
         msg.readInt32("price");
     }
 }
@@ -165,7 +169,10 @@ void CashShopRecv::processCashShopTabPriceList(Net::MessageIn &msg)
 void CashShopRecv::processCashShopSchedule(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
-    const int count = (msg.readInt16("len") - 8) / 6;
+    int blockSize = 6;
+    if (itemIdLen == 4)
+        blockSize += 2;
+    const int count = (msg.readInt16("len") - 8) / blockSize;
     const int itemsCount = msg.readInt16("count");
     msg.readInt16("tab");
     if (count != itemsCount)
@@ -173,7 +180,7 @@ void CashShopRecv::processCashShopSchedule(Net::MessageIn &msg)
 
     for (int f = 0; f < count; f ++)
     {
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readInt32("price");
     }
 }
diff --git a/src/net/eathena/chatrecv.cpp b/src/net/eathena/chatrecv.cpp
index 12ebe2ee9..66edbebe7 100644
--- a/src/net/eathena/chatrecv.cpp
+++ b/src/net/eathena/chatrecv.cpp
@@ -728,13 +728,13 @@ void ChatRecv::processChatRoomRoleChange(Net::MessageIn &msg)
 void ChatRecv::processMVPItem(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
-    msg.readInt16("item id");
+    msg.readItemId("item id");
 }
 
 void ChatRecv::processMVPExp(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
-    msg.readInt32("exo");
+    msg.readInt32("exp");
 }
 
 void ChatRecv::processMVPNoItem(Net::MessageIn &msg)
diff --git a/src/net/eathena/homunculusrecv.cpp b/src/net/eathena/homunculusrecv.cpp
index 0f0d619ae..5f0b586bd 100644
--- a/src/net/eathena/homunculusrecv.cpp
+++ b/src/net/eathena/homunculusrecv.cpp
@@ -227,7 +227,7 @@ void HomunculusRecv::processHomunculusSkillUp(Net::MessageIn &msg)
 void HomunculusRecv::processHomunculusFood(Net::MessageIn &msg)
 {
     const int flag = msg.readUInt8("fail");
-    const int itemId = msg.readInt16("food id");
+    const int itemId = msg.readItemId("food id");
     if (flag != 0)
     {
         NotifyManager::notify(NotifyTypes::HOMUNCULUS_FEED_OK);
diff --git a/src/net/eathena/inventoryrecv.cpp b/src/net/eathena/inventoryrecv.cpp
index 8ea2597ee..d1351229c 100644
--- a/src/net/eathena/inventoryrecv.cpp
+++ b/src/net/eathena/inventoryrecv.cpp
@@ -62,6 +62,7 @@
 
 extern int serverVersion;
 extern int packetVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -125,13 +126,14 @@ void InventoryRecv::processPlayerEquipment(Net::MessageIn &msg)
         packetLen += 2;
     if (msg.getVersion() >= 20150226)
         packetLen += 26;
+    packetLen += itemIdLen * 5 - 2 * 5;   // - 5 items by 2 bytes. + 5 items
 
     const int number = (msg.getLength() - 4) / packetLen;
 
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("index") - INVENTORY_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         int equipType;
@@ -150,7 +152,7 @@ void InventoryRecv::processPlayerEquipment(Net::MessageIn &msg)
         const uint8_t refine = CAST_U8(msg.readInt8("refine"));
         int cards[maxCards];
         for (int f = 0; f < maxCards; f++)
-            cards[f] = msg.readUInt16("card");
+            cards[f] = msg.readItemId("card");
         if (msg.getVersion() >= 20071002)
             msg.readInt32("hire expire date (?)");
         if (msg.getVersion() >= 20080102)
@@ -216,14 +218,14 @@ void InventoryRecv::processPlayerInventoryAdd(Net::MessageIn &msg)
     }
     const int index = msg.readInt16("index") - INVENTORY_OFFSET;
     int amount = msg.readInt16("count");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     const uint8_t identified = msg.readUInt8("identified");
     const uint8_t damaged = msg.readUInt8("is damaged");
     const uint8_t refine = msg.readUInt8("refine");
     Favorite favorite = Favorite_false;
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readItemId("card");
     int equipType;
     if (msg.getVersion() >= 20120925)
         equipType = msg.readInt32("location");
@@ -389,13 +391,14 @@ void InventoryRecv::processPlayerInventory(Net::MessageIn &msg)
         packetLen += 8;
     if (msg.getVersion() >= 20080102)
         packetLen += 4;
+    packetLen += itemIdLen * 5 - 10;
 
     const int number = (msg.getLength() - 4) / packetLen;
 
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("item index") - INVENTORY_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         if (msg.getVersion() < 20120925)
@@ -409,7 +412,7 @@ void InventoryRecv::processPlayerInventory(Net::MessageIn &msg)
         if (packetVersion >= 5)
         {
             for (int f = 0; f < maxCards; f++)
-                cards[f] = msg.readUInt16("card");
+                cards[f] = msg.readItemId("card");
         }
         else
         {
@@ -459,6 +462,7 @@ void InventoryRecv::processPlayerStorage(Net::MessageIn &msg)
         packetLen += 8;
     if (msg.getVersion() >= 20080102)
         packetLen += 4;
+    packetLen += itemIdLen * 5 - 10;
 
     int number;
     if (msg.getVersion() >= 20120925)
@@ -474,7 +478,7 @@ void InventoryRecv::processPlayerStorage(Net::MessageIn &msg)
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("item index") - STORAGE_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         if (msg.getVersion() < 20120925)
@@ -488,7 +492,7 @@ void InventoryRecv::processPlayerStorage(Net::MessageIn &msg)
         if (msg.getVersion() >= 5)
         {
             for (int f = 0; f < maxCards; f++)
-                cards[f] = msg.readUInt16("card");
+                cards[f] = msg.readItemId("card");
         }
         else
         {
@@ -661,6 +665,7 @@ void InventoryRecv::processPlayerStorageEquip(Net::MessageIn &msg)
         packetLen += 2;
     if (msg.getVersion() >= 20150226)
         packetLen += 26;
+    packetLen += itemIdLen * 5 - 10;
 
     int number;
     if (msg.getVersion() >= 20120925)
@@ -676,7 +681,7 @@ void InventoryRecv::processPlayerStorageEquip(Net::MessageIn &msg)
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("index") - STORAGE_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         const int amount = 1;
@@ -695,7 +700,7 @@ void InventoryRecv::processPlayerStorageEquip(Net::MessageIn &msg)
         const uint8_t refine = msg.readUInt8("refine level");
         int cards[maxCards];
         for (int f = 0; f < maxCards; f++)
-            cards[f] = msg.readUInt16("card");
+            cards[f] = msg.readItemId("card");
         if (msg.getVersion() >= 20071002)
             msg.readInt32("hire expire date");
         if (msg.getVersion() >= 20080102)
@@ -745,7 +750,7 @@ void InventoryRecv::processPlayerStorageAdd(Net::MessageIn &msg)
     // Move an item into storage
     const int index = msg.readInt16("index") - STORAGE_OFFSET;
     const int amount = msg.readInt32("amount");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     ItemTypeT itemType;
     if (msg.getVersion() >= 5)
         itemType = static_cast<ItemTypeT>(msg.readUInt8("type"));
@@ -756,7 +761,7 @@ void InventoryRecv::processPlayerStorageAdd(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readItemId("card");
     ItemOptionsList *options = nullptr;
     if (msg.getVersion() >= 20150226)
     {
@@ -857,7 +862,7 @@ void InventoryRecv::processPlayerInsertCard(Net::MessageIn &msg)
 
 void InventoryRecv::processPlayerItemRentalTime(Net::MessageIn &msg)
 {
-    const int id = msg.readInt16("item id");
+    const int id = msg.readItemId("item id");
     const int seconds = msg.readInt32("seconds");
     const ItemInfo &info = ItemDB::get(id);
     const std::string timeStr = timeDiffToString(seconds);
@@ -873,7 +878,7 @@ void InventoryRecv::processPlayerItemRentalExpired(Net::MessageIn &msg)
         ? PlayerInfo::getInventory() : nullptr;
 
     const int index = msg.readInt16("index") - INVENTORY_OFFSET;
-    const int id = msg.readInt16("item id");
+    const int id = msg.readItemId("item id");
     const ItemInfo &info = ItemDB::get(id);
 
     NotifyManager::notify(NotifyTypes::RENTAL_TIME_EXPIRED,
@@ -957,7 +962,7 @@ void InventoryRecv::processPlayerCartAdd(Net::MessageIn &msg)
 
     const int index = msg.readInt16("index") - INVENTORY_OFFSET;
     int amount = msg.readInt32("count");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     ItemTypeT itemType = ItemType::Unknown;
     if (msg.getVersion() >= 5)
     {
@@ -969,7 +974,7 @@ void InventoryRecv::processPlayerCartAdd(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readItemId("card");
     ItemOptionsList *options = nullptr;
     if (msg.getVersion() >= 20150226)
     {
@@ -1042,12 +1047,13 @@ void InventoryRecv::processPlayerCartEquip(Net::MessageIn &msg)
         packetLen += 2;
     if (msg.getVersion() >= 20150226)
         packetLen += 26;
+    packetLen += itemIdLen * 5 - 10;
 
     const int number = (msg.getLength() - 4) / packetLen;
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("index") - INVENTORY_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         const int amount = 1;
@@ -1066,7 +1072,7 @@ void InventoryRecv::processPlayerCartEquip(Net::MessageIn &msg)
         const uint8_t refine = msg.readUInt8("refine level");
         int cards[maxCards];
         for (int f = 0; f < maxCards; f++)
-            cards[f] = msg.readUInt16("card");
+            cards[f] = msg.readItemId("card");
         if (msg.getVersion() >= 20071002)
             msg.readInt32("hire expire date");
         if (msg.getVersion() >= 20080102)
@@ -1124,12 +1130,13 @@ void InventoryRecv::processPlayerCartItems(Net::MessageIn &msg)
         packetLen += 8;
     if (msg.getVersion() >= 20080102)
         packetLen += 4;
+    packetLen += itemIdLen * 5 - 10;
 
     const int number = (msg.getLength() - 4) / packetLen;
     for (int loop = 0; loop < number; loop++)
     {
         const int index = msg.readInt16("item index") - INVENTORY_OFFSET;
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
         if (msg.getVersion() < 20120925)
@@ -1141,7 +1148,7 @@ void InventoryRecv::processPlayerCartItems(Net::MessageIn &msg)
         if (msg.getVersion() >= 5)
         {
             for (int f = 0; f < maxCards; f++)
-                cards[f] = msg.readUInt16("card");
+                cards[f] = msg.readItemId("card");
         }
         else
         {
@@ -1252,14 +1259,15 @@ void InventoryRecv::processPlayerRepairList(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 4) / 13;
+    const int count = (msg.readInt16("len") - 4) /
+        (3 + (1 + maxCards) * itemIdLen);
     for (int f = 0; f < count; f ++)
     {
         msg.readInt16("index");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            msg.readUInt16("card");
+            msg.readItemId("card");
     }
     menu = MenuType::RepairWespon;
 }
@@ -1276,15 +1284,16 @@ void InventoryRecv::processPlayerRefineList(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 4) / 13;
+    const int count = (msg.readInt16("len") - 4) /
+        (3 + (1 + maxCards) * itemIdLen);
 
     for (int f = 0; f < count; f ++)
     {
         msg.readInt16("item index");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            msg.readUInt16("card");
+            msg.readItemId("card");
     }
     menu = MenuType::WeaponeRefine;
 }
@@ -1308,10 +1317,10 @@ void InventoryRecv::processPlayerCookingList(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 6) / 2;
+    const int count = (msg.readInt16("len") - 6) / itemIdLen;
     msg.readInt16("list type");
     for (int f = 0; f < count; f ++)
-        msg.readInt16("item id");
+        msg.readItemId("item id");
 }
 
 void InventoryRecv::processItemDamaged(Net::MessageIn &msg)
diff --git a/src/net/eathena/itemrecv.cpp b/src/net/eathena/itemrecv.cpp
index 9b8fb3400..1a3806f55 100644
--- a/src/net/eathena/itemrecv.cpp
+++ b/src/net/eathena/itemrecv.cpp
@@ -41,7 +41,7 @@ namespace EAthena
 void ItemRecv::processItemDropped(Net::MessageIn &msg)
 {
     const BeingId id = msg.readBeingId("id");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     ItemTypeT itemType = ItemType::Unknown;
     if (msg.getVersion() >= 20130000)
         itemType = static_cast<ItemTypeT>(msg.readInt16("type"));
@@ -77,7 +77,7 @@ void ItemRecv::processItemDropped(Net::MessageIn &msg)
 void ItemRecv::processItemDropped2(Net::MessageIn &msg)
 {
     const BeingId id = msg.readBeingId("id");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readInt16("item id");  // +++ need use int32
     const ItemTypeT itemType = static_cast<ItemTypeT>(msg.readUInt8("type"));
     const Identified identified = fromInt(
         msg.readUInt8("identify"), Identified);
@@ -85,12 +85,13 @@ void ItemRecv::processItemDropped2(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readUInt16("card");  // ++ need use int32
     const int x = msg.readInt16("x");
     const int y = msg.readInt16("y");
     const int amount = msg.readInt16("amount");
     const int subX = CAST_S32(msg.readInt8("subx"));
     const int subY = CAST_S32(msg.readInt8("suby"));
+    // +++ probably need add drop effect fields?
 
     if (actorManager != nullptr)
     {
@@ -113,7 +114,7 @@ void ItemRecv::processItemMvpDropped(Net::MessageIn &msg)
     UNIMPLEMENTEDPACKET;
     msg.readInt16("len");
     msg.readUInt8("type");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     msg.readUInt8("len");
     msg.readString(24, "name");
     msg.readUInt8("monster name len");
@@ -123,7 +124,7 @@ void ItemRecv::processItemMvpDropped(Net::MessageIn &msg)
 void ItemRecv::processItemVisible(Net::MessageIn &msg)
 {
     const BeingId id = msg.readBeingId("item object id");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     const Identified identified = fromInt(
         msg.readUInt8("identify"), Identified);
     const int x = msg.readInt16("x");
@@ -151,7 +152,7 @@ void ItemRecv::processItemVisible(Net::MessageIn &msg)
 void ItemRecv::processItemVisible2(Net::MessageIn &msg)
 {
     const BeingId id = msg.readBeingId("item object id");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readInt16("item id");  // +++ need use int32
     const ItemTypeT itemType = static_cast<ItemTypeT>(
         msg.readUInt8("type"));
     const Identified identified = fromInt(
@@ -160,7 +161,7 @@ void ItemRecv::processItemVisible2(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readUInt16("card");  // +++ need use int32
     const int x = msg.readInt16("x");
     const int y = msg.readInt16("y");
     const int amount = msg.readInt16("amount");
diff --git a/src/net/eathena/mail2recv.cpp b/src/net/eathena/mail2recv.cpp
index 5c1db8de6..d22bc211e 100644
--- a/src/net/eathena/mail2recv.cpp
+++ b/src/net/eathena/mail2recv.cpp
@@ -81,7 +81,7 @@ void Mail2Recv::processAddItemResult(Net::MessageIn &msg)
     const int res = msg.readUInt8("result");
     const int index = msg.readInt16("index") - INVENTORY_OFFSET;
     const int amount = msg.readInt16("amount");
-    const int itemId = msg.readInt16("item id");
+    const int itemId = msg.readItemId("item id");
     const ItemTypeT itemType = static_cast<ItemTypeT>(
         msg.readUInt8("item type"));
     const uint8_t identify = msg.readUInt8("identify");
@@ -89,7 +89,7 @@ void Mail2Recv::processAddItemResult(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readItemId("card");
     ItemOptionsList *options = new ItemOptionsList(5);
     for (int f = 0; f < 5; f ++)
     {
@@ -99,11 +99,8 @@ void Mail2Recv::processAddItemResult(Net::MessageIn &msg)
         options->add(idx, val);
     }
     msg.readInt16("weight");
-    msg.readUInt8("unknown 1");
-    msg.readUInt8("unknown 2");
-    msg.readUInt8("unknown 3");
-    msg.readUInt8("unknown 4");
-    msg.readUInt8("unknown 5");
+    Favorite favorite = fromBool(msg.readUInt8("favorite"), Favorite);
+    msg.readInt32("location");
 
     if (mailEditWindow == nullptr)
     {
@@ -159,7 +156,7 @@ void Mail2Recv::processAddItemResult(Net::MessageIn &msg)
             ItemColorManager::getColorFromCards(&cards[0]),
             fromBool(identify, Identified),
             damaged,
-            Favorite_false,
+            favorite,
             Equipm_false,
             Equipped_false);
         if (slot == -1)
@@ -412,15 +409,16 @@ void Mail2Recv::processReadMail(Net::MessageIn &msg)
         for (int f = 0; f < itemsCount; f ++)
         {
             msg.readInt16("amount");
-            msg.readInt16("item id");
+            msg.readItemId("item id");
             msg.readUInt8("identify");
             msg.readUInt8("damaged");
             msg.readUInt8("refine");
             for (int d = 0; d < maxCards; d ++)
-                msg.readUInt16("card");
-            msg.readInt32("unknown");
+                msg.readItemId("card");
+            msg.readInt32("location");
             msg.readUInt8("type");
-            msg.readInt32("unknown");
+            msg.readInt16("view sprite");
+            msg.readInt16("bind on equip");
             for (int d = 0; d < 5; d ++)
             {
                 msg.readInt16("option index");
@@ -443,17 +441,18 @@ void Mail2Recv::processReadMail(Net::MessageIn &msg)
         if (msg.getUnreadLength() == 0)
             break;
         const int amount = msg.readInt16("amount");
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const uint8_t identify = msg.readUInt8("identify");
         const Damaged damaged = fromBool(msg.readUInt8("attribute"), Damaged);
         const uint8_t refine = msg.readUInt8("refine");
         int cards[maxCards];
         for (int d = 0; d < maxCards; d ++)
-            cards[d] = msg.readUInt16("card");
-        msg.readInt32("unknown");
+            cards[d] = msg.readItemId("card");
+        msg.readInt32("location");
         const ItemTypeT itemType = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
-        msg.readInt32("unknown");
+        msg.readInt16("view sprite");
+        msg.readInt16("bind on equip");
         ItemOptionsList *options = new ItemOptionsList(5);
         for (int d = 0; d < 5; d ++)
         {
diff --git a/src/net/eathena/markethandler.cpp b/src/net/eathena/markethandler.cpp
index 17e1bffd5..31e930a67 100644
--- a/src/net/eathena/markethandler.cpp
+++ b/src/net/eathena/markethandler.cpp
@@ -75,7 +75,7 @@ void MarketHandler::buyItem(const int itemId,
     outMsg.writeInt16(CAST_S16(4 + 6 * cnt), "len");
     for (int f = 0; f < cnt; f ++)
     {
-        outMsg.writeInt16(CAST_S16(itemId), "item id");
+        outMsg.writeInt16(CAST_S16(itemId), "item id");  // +++ 20180711 re
         outMsg.writeInt32(CAST_S16(amount2), "amount");
     }
 }
@@ -130,13 +130,14 @@ void MarketHandler::buyItems(const STD_VECTOR<ShopItem*> &items) const
             for (int f = 0; f < usedQuantity; f ++)
             {
                 outMsg.writeInt16(CAST_S16(item->getId()),
-                    "item id");
+                    "item id");  // +++ 20180711 re
                 outMsg.writeInt32(CAST_S16(1), "amount");
             }
         }
         else
         {
-            outMsg.writeInt16(CAST_S16(item->getId()), "item id");
+            outMsg.writeInt16(CAST_S16(item->getId()),
+                              "item id");  // +++ 20180711 re
             outMsg.writeInt32(CAST_S16(usedQuantity), "amount");
         }
     }
diff --git a/src/net/eathena/marketrecv.cpp b/src/net/eathena/marketrecv.cpp
index 54947ccaa..c2d310193 100644
--- a/src/net/eathena/marketrecv.cpp
+++ b/src/net/eathena/marketrecv.cpp
@@ -42,6 +42,8 @@
 
 #include "debug.h"
 
+extern int itemIdLen;
+
 namespace EAthena
 {
 
@@ -53,7 +55,7 @@ namespace MarketRecv
 
 void MarketRecv::processMarketOpen(Net::MessageIn &msg)
 {
-    const int len = (msg.readInt16("len") - 4) / 13;
+    const int len = (msg.readInt16("len") - 4) / (11 + itemIdLen);
 
     const BeingTypeId npcId = NpcRecv::mNpcTypeId;
     std::string currency;
@@ -78,7 +80,7 @@ void MarketRecv::processMarketOpen(Net::MessageIn &msg)
 
     for (int f = 0; f < len; f ++)
     {
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         const ItemTypeT type = static_cast<ItemTypeT>(msg.readUInt8("type"));
         const int value = msg.readInt32("price");
         const int amount = msg.readInt32("amount");
@@ -91,11 +93,11 @@ void MarketRecv::processMarketOpen(Net::MessageIn &msg)
 
 void MarketRecv::processMarketBuyAck(Net::MessageIn &msg)
 {
-    const int len = (msg.readInt16("len") - 5) / 8;
+    const int len = (msg.readInt16("len") - 5) / (6 + itemIdLen);
     const int res = msg.readUInt8("result");
     for (int f = 0; f < len; f ++)
     {
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readInt16("amount");
         msg.readInt32("price");
     }
diff --git a/src/net/eathena/npchandler.cpp b/src/net/eathena/npchandler.cpp
index 384b38d18..eb4108bb2 100644
--- a/src/net/eathena/npchandler.cpp
+++ b/src/net/eathena/npchandler.cpp
@@ -48,6 +48,7 @@
 extern int packetVersion;
 extern int packetVersionMain;
 extern int packetVersionRe;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -164,13 +165,13 @@ void NpcHandler::buyItem(const BeingId beingId A_UNUSED,
     createOutPacket(CMSG_NPC_BUY_REQUEST);
     outMsg.writeInt16(8, "len");
     outMsg.writeInt16(CAST_S16(amount), "amount");
-    outMsg.writeInt16(CAST_S16(itemId), "item id");
+    outMsg.writeItemId(itemId, "item id");
 }
 
 void NpcHandler::buyItems(STD_VECTOR<ShopItem*> &items) const
 {
     int cnt = 0;
-    const int pairSize = 4;
+    const int pairSize = 2 + itemIdLen;
 
     FOR_EACH (STD_VECTOR<ShopItem*>::iterator, it, items)
     {
@@ -214,14 +215,14 @@ void NpcHandler::buyItems(STD_VECTOR<ShopItem*> &items) const
             for (int f = 0; f < usedQuantity; f ++)
             {
                 outMsg.writeInt16(CAST_S16(1), "amount");
-                outMsg.writeInt16(CAST_S16(item->getId()),
+                outMsg.writeItemId(item->getId(),
                     "item id");
             }
         }
         else
         {
             outMsg.writeInt16(CAST_S16(usedQuantity), "amount");
-            outMsg.writeInt16(CAST_S16(item->getId()), "item id");
+            outMsg.writeItemId(item->getId(), "item id");
         }
     }
 }
@@ -374,7 +375,7 @@ void NpcHandler::requestAirship(const std::string &mapName,
     }
     createOutPacket(CMSG_PRIVATE_AIRSHIP_REQUEST);
     outMsg.writeString(mapName, 16, "map name");
-    outMsg.writeInt16(CAST_S16(itemId), "item");
+    outMsg.writeItemId(itemId, "item");
 }
 
 }  // namespace EAthena
diff --git a/src/net/eathena/partyrecv.cpp b/src/net/eathena/partyrecv.cpp
index 336c7cfd0..daef7a148 100644
--- a/src/net/eathena/partyrecv.cpp
+++ b/src/net/eathena/partyrecv.cpp
@@ -355,12 +355,12 @@ void PartyRecv::processPartyItemPickup(Net::MessageIn &msg)
     // +++ probably need add option to show pickup notifications
     // in party tab
     msg.readBeingId("account id");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     msg.readUInt8("identify");
     msg.readUInt8("attribute");
     msg.readUInt8("refine");
     for (int f = 0; f < maxCards; f++)
-        msg.readUInt16("card");
+        msg.readItemId("card");
     msg.readInt16("equip location");
     msg.readUInt8("item type");
     // for color can be used ItemColorManager
diff --git a/src/net/eathena/pethandler.cpp b/src/net/eathena/pethandler.cpp
index 72243057f..29e814ff7 100644
--- a/src/net/eathena/pethandler.cpp
+++ b/src/net/eathena/pethandler.cpp
@@ -135,7 +135,7 @@ void PetHandler::evolution(const Item *const item) const
         return;
     }
     createOutPacket(CMSG_PET_EVOLUTION);
-    outMsg.writeInt16(CAST_S16(item->getId()), "egg id");
+    outMsg.writeItemId(item->getId(), "egg id");
 }
 
 }  // namespace EAthena
diff --git a/src/net/eathena/petrecv.cpp b/src/net/eathena/petrecv.cpp
index 344b388ac..b8edee09a 100644
--- a/src/net/eathena/petrecv.cpp
+++ b/src/net/eathena/petrecv.cpp
@@ -145,7 +145,7 @@ void PetRecv::processPetStatus(Net::MessageIn &msg)
     const int level = msg.readInt16("level");
     const int hungry = msg.readInt16("hungry");
     const int intimacy = msg.readInt16("intimacy");
-    const int equip = msg.readInt16("equip");
+    const int equip = msg.readInt16("equip");  // look like always int16
 
 //    Being *const being = PlayerInfo::getPetBeing();
 //    if (being)
@@ -168,7 +168,7 @@ void PetRecv::processPetStatus(Net::MessageIn &msg)
 void PetRecv::processPetFood(Net::MessageIn &msg)
 {
     const int result = msg.readUInt8("result");
-    msg.readInt16("food id");
+    msg.readItemId("food id");
     if (result != 0)
         NotifyManager::notify(NotifyTypes::PET_FEED_OK);
     else
diff --git a/src/net/eathena/playerrecv.cpp b/src/net/eathena/playerrecv.cpp
index 11d9e9bc1..95811448f 100644
--- a/src/net/eathena/playerrecv.cpp
+++ b/src/net/eathena/playerrecv.cpp
@@ -388,7 +388,7 @@ void PlayerRecv::processPlayerUpgradeMessage(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
     msg.readInt32("result");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
 }
 
 void PlayerRecv::processPlayerFameTaekwon(Net::MessageIn &msg)
@@ -407,6 +407,7 @@ void PlayerRecv::processPlayerReadBook(Net::MessageIn &msg)
 
 void PlayerRecv::processPlayerEquipTickAck(Net::MessageIn &msg)
 {
+    // +++ actually ZC_CONFIG
     UNIMPLEMENTEDPACKET;
     msg.readInt32("unused");
     msg.readInt32("flag");
diff --git a/src/net/eathena/rouletterecv.cpp b/src/net/eathena/rouletterecv.cpp
index 49666f49f..352da948a 100644
--- a/src/net/eathena/rouletterecv.cpp
+++ b/src/net/eathena/rouletterecv.cpp
@@ -57,7 +57,7 @@ void RouletteRecv::processRouletteItemAck(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
     msg.readUInt8("result");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
 }
 
 void RouletteRecv::processRouletteGenerateAckType(Net::MessageIn &msg)
@@ -66,7 +66,7 @@ void RouletteRecv::processRouletteGenerateAckType(Net::MessageIn &msg)
     msg.readUInt8("result");
     msg.readInt16("step");
     msg.readInt16("idx");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
     msg.readInt32("remain gold");
     msg.readInt32("remain silver");
     msg.readInt32("remain bronze");
@@ -79,7 +79,7 @@ void RouletteRecv::processRouletteOpenAck(Net::MessageIn &msg)
     msg.readInt32("serial");
     msg.readUInt8("step");
     msg.readUInt8("idx");
-    msg.readInt16("additional item id");
+    msg.readItemId("additional item id");
     msg.readInt32("gold point");
     msg.readInt32("silver point");
     msg.readInt32("bronze point");
diff --git a/src/net/eathena/searchstorehandler.cpp b/src/net/eathena/searchstorehandler.cpp
index 48b4be501..66bbc1674 100644
--- a/src/net/eathena/searchstorehandler.cpp
+++ b/src/net/eathena/searchstorehandler.cpp
@@ -56,7 +56,8 @@ void SearchStoreHandler::search(const StoreSearchTypeT type,
     outMsg.writeInt32(minPrice, "min price");
     outMsg.writeInt32(1, "items count");
     outMsg.writeInt32(0, "cards count");
-    outMsg.writeInt16(CAST_S16(itemId), "item id");
+    outMsg.writeItemId(itemId, "item id");
+    // +++ missing for by items and cards
 }
 
 void SearchStoreHandler::nextPage() const
@@ -82,7 +83,7 @@ void SearchStoreHandler::select(const int accountId,
     createOutPacket(CMSG_SEARCHSTORE_CLICK);
     outMsg.writeInt32(accountId, "account id");
     outMsg.writeInt32(storeId, "store id");
-    outMsg.writeInt16(CAST_S16(itemId), "item id");
+    outMsg.writeItemId(itemId, "item id");
 }
 
 }  // namespace EAthena
diff --git a/src/net/eathena/searchstorerecv.cpp b/src/net/eathena/searchstorerecv.cpp
index 22fdec26b..b0dacb263 100644
--- a/src/net/eathena/searchstorerecv.cpp
+++ b/src/net/eathena/searchstorerecv.cpp
@@ -31,13 +31,15 @@
 
 #include "debug.h"
 
+extern int itemIdLen;
+
 namespace EAthena
 {
 
 void SearchStoreRecv::processSearchAck(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
-    const int count = (msg.readInt16("len") - 7) / 106;
+    const int count = (msg.readInt16("len") - 7) / (104 + itemIdLen);
     msg.readUInt8("is first page");
     msg.readUInt8("is next page");
     msg.readUInt8("remain uses");
@@ -46,13 +48,13 @@ void SearchStoreRecv::processSearchAck(Net::MessageIn &msg)
         msg.readInt32("store id");
         msg.readInt32("aoount id");
         msg.readString(80, "store name");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readUInt8("item type");
         msg.readInt32("price");
         msg.readInt16("amount");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d++)
-            msg.readUInt16("card");
+            msg.readItemId("card");
         if (msg.getVersion() >= 20150226)
         {
             for (int d = 0; d < 5; d ++)
diff --git a/src/net/eathena/skillrecv.cpp b/src/net/eathena/skillrecv.cpp
index 2d7bb04a9..609f71250 100644
--- a/src/net/eathena/skillrecv.cpp
+++ b/src/net/eathena/skillrecv.cpp
@@ -60,6 +60,7 @@ static const unsigned int RFAIL_NEED_EQUIPMENT = 72;
 static const unsigned int RFAIL_SPIRITS        = 74;
 
 extern int serverVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -273,7 +274,8 @@ void SkillRecv::processSkillFailed(Net::MessageIn &msg)
     // Action failed (ex. sit because you have not reached the
     // right level)
     const int skillId = msg.readInt16("skill id");
-    const int bskill  = msg.readInt32("btype");
+    const int bskill  = msg.readItemId("btype");
+    const int itemId  = msg.readItemId("item id");
     const signed char success = msg.readUInt8("success");
     const signed char reason  = msg.readUInt8("reason");
     if (success != CAST_S32(SKILL_FAILED)
@@ -372,8 +374,7 @@ void SkillRecv::processSkillFailed(Net::MessageIn &msg)
             break;
         case RFAIL_NEED_EQUIPMENT:
         {
-            const int itemId = bskill >> 16U;
-            const int amount = bskill & 0xFFFFU;
+            const int amount = bskill;
             const ItemInfo &info = ItemDB::get(itemId);
             if (amount == 1)
             {
@@ -392,8 +393,7 @@ void SkillRecv::processSkillFailed(Net::MessageIn &msg)
         }
         case RFAIL_NEED_ITEM:
         {
-            const int itemId = bskill >> 16U;
-            const int amount = bskill & 0xFFFFU;
+            const int amount = bskill;
             const ItemInfo &info = ItemDB::get(itemId);
             if (amount == 1)
             {
@@ -466,12 +466,12 @@ void SkillRecv::processSkillProduceMixList(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 8) / 8;
+    const int count = (msg.readInt16("len") - 4) / 4 * itemIdLen;
     for (int f = 0; f < count; f ++)
     {
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         for (int d = 0; d < 3; d ++)
-            msg.readInt16("material id");
+            msg.readItemId("material id");
     }
 }
 
@@ -480,7 +480,7 @@ void SkillRecv::processSkillProduceEffect(Net::MessageIn &msg)
     UNIMPLEMENTEDPACKET;
 
     msg.readInt16("flag");
-    msg.readInt16("item id");
+    msg.readItemId("item id");
 }
 
 void SkillRecv::processSkillUnitUpdate(Net::MessageIn &msg)
@@ -494,9 +494,9 @@ void SkillRecv::processSkillArrowCreateList(Net::MessageIn &msg)
 {
     UNIMPLEMENTEDPACKET;
 
-    const int count = (msg.readInt16("len") - 4) / 2;
+    const int count = (msg.readInt16("len") - 4) / itemIdLen;
     for (int f = 0; f < count; f ++)
-        msg.readInt16("item id");
+        msg.readItemId("item id");
 }
 
 void SkillRecv::processSkillAutoSpells(Net::MessageIn &msg)
diff --git a/src/net/eathena/traderecv.cpp b/src/net/eathena/traderecv.cpp
index 69b215620..72f6dc583 100644
--- a/src/net/eathena/traderecv.cpp
+++ b/src/net/eathena/traderecv.cpp
@@ -74,7 +74,7 @@ void TradeRecv::processTradeResponse(Net::MessageIn &msg)
 
 void TradeRecv::processTradeItemAdd(Net::MessageIn &msg)
 {
-    const int type = msg.readInt16("type");
+    const int type = msg.readItemId("item id");
     ItemTypeT itemType = ItemType::Unknown;
     if (msg.getVersion() >= 20100223)
     {
@@ -87,7 +87,7 @@ void TradeRecv::processTradeItemAdd(Net::MessageIn &msg)
     const uint8_t refine = msg.readUInt8("refine");
     int cards[maxCards];
     for (int f = 0; f < maxCards; f++)
-        cards[f] = msg.readUInt16("card");
+        cards[f] = msg.readItemId("card");
     ItemOptionsList *options = nullptr;
     if (msg.getVersion() >= 20150226)
     {
diff --git a/src/net/eathena/updateprotocol.cpp b/src/net/eathena/updateprotocol.cpp
index 15050d099..21f6c001a 100644
--- a/src/net/eathena/updateprotocol.cpp
+++ b/src/net/eathena/updateprotocol.cpp
@@ -36,12 +36,14 @@ extern int evolPacketOffset;
 extern bool packets_main;
 extern bool packets_re;
 extern bool packets_zero;
+extern int itemIdLen;
 
 namespace EAthena
 {
 
 void updateProtocol()
 {
+    itemIdLen = 2;
     logger->log("packet version: %d", packetVersion);
     if (packets_main == true)
     {
@@ -64,6 +66,10 @@ void updateProtocol()
         packetVersionMain = 0;
         packetVersionRe = 0;
     }
+    if (packetVersionRe >= 20180704)
+    {
+        itemIdLen = 4;
+    }
 #define PACKETS_UPDATE
 #include "net/protocoloutupdate.h"
 #include "net/eathena/packetsout.inc"
diff --git a/src/net/eathena/vendingrecv.cpp b/src/net/eathena/vendingrecv.cpp
index 2e8092886..b16c3eefa 100644
--- a/src/net/eathena/vendingrecv.cpp
+++ b/src/net/eathena/vendingrecv.cpp
@@ -58,6 +58,7 @@
 
 extern int packetVersion;
 extern int serverVersion;
+extern int itemIdLen;
 
 namespace EAthena
 {
@@ -112,6 +113,8 @@ void VendingRecv::processItemsList(Net::MessageIn &msg)
         packetLen = 53;
     else if (msg.getVersion() >= 20150226)
         packetLen = 47;
+    if (itemIdLen == 4)
+        packetLen += 10;
     int offset = 8;
     if (msg.getVersion() >= 20100105)
         offset += 4;
@@ -133,12 +136,12 @@ void VendingRecv::processItemsList(Net::MessageIn &msg)
         const int index = msg.readInt16("inv index");
         const ItemTypeT type = static_cast<ItemTypeT>(
             msg.readUInt8("item type"));
-        const int itemId = msg.readInt16("item id");
+        const int itemId = msg.readItemId("item id");
         msg.readUInt8("identify");
         msg.readUInt8("attribute");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            cards[d] = msg.readUInt16("card");
+            cards[d] = msg.readItemId("card");
         ItemOptionsList *options = nullptr;
         if (msg.getVersion() >= 20150226)
         {
@@ -207,6 +210,8 @@ void VendingRecv::processOpen(Net::MessageIn &msg)
     int packetLen = 22;
     if (msg.getVersion() >= 20150226)
         packetLen += 25;
+    if (itemIdLen == 4)
+        packetLen += 10;
 
     const int count = (msg.readInt16("len") - 8) / packetLen;
     msg.readInt32("id");
@@ -216,12 +221,12 @@ void VendingRecv::processOpen(Net::MessageIn &msg)
         msg.readInt16("inv index");
         msg.readInt16("amount");
         msg.readUInt8("item type");
-        msg.readInt16("item id");
+        msg.readItemId("item id");
         msg.readUInt8("identify");
         msg.readUInt8("attribute");
         msg.readUInt8("refine");
         for (int d = 0; d < maxCards; d ++)
-            msg.readUInt16("card");
+            msg.readItemId("card");
         if (msg.getVersion() >= 20150226)
         {
             for (int d = 0; d < 5; d ++)
diff --git a/src/net/messagein.cpp b/src/net/messagein.cpp
index 5b942a2d0..d5888534e 100644
--- a/src/net/messagein.cpp
+++ b/src/net/messagein.cpp
@@ -42,6 +42,8 @@ PRAGMA48(GCC diagnostic pop)
     (CAST_U16((CAST_U8(low)) | \
     (CAST_U16(CAST_U8(high))) << 8))
 
+extern int itemIdLen;
+
 namespace Net
 {
 
@@ -208,6 +210,13 @@ uint32_t MessageIn::readUInt32(const char *const str)
     return value;
 }
 
+int MessageIn::readItemId(const char *const str)
+{
+    if (itemIdLen == 2)
+        return readUInt16(str);
+    return readInt32(str);
+}
+
 BeingId MessageIn::readBeingId(const char *const str)
 {
     return fromInt(readUInt32(str), BeingId);
diff --git a/src/net/messagein.h b/src/net/messagein.h
index ea2caa499..255710349 100644
--- a/src/net/messagein.h
+++ b/src/net/messagein.h
@@ -80,6 +80,8 @@ class MessageIn notfinal
 
         uint32_t readUInt32(const char *const str);
 
+        int readItemId(const char *const str);
+
         int64_t readInt64(const char *const str);
 
         BeingId readBeingId(const char *const str);
diff --git a/src/net/messageout.cpp b/src/net/messageout.cpp
index 69993e4d8..841e1183d 100644
--- a/src/net/messageout.cpp
+++ b/src/net/messageout.cpp
@@ -40,6 +40,8 @@ PRAGMA48(GCC diagnostic pop)
 #error missing SDL_endian.h
 #endif  // SDL_BYTEORDER
 
+extern int itemIdLen;
+
 namespace Net
 {
 
@@ -98,6 +100,15 @@ void MessageOut::writeInt32(const int32_t value, const char *const str)
     mPos += 4;
 }
 
+void MessageOut::writeItemId(const int32_t value,
+                             const char *const str)
+{
+    if (itemIdLen == 2)
+        writeInt16(CAST_S32(value), str);
+    else
+        writeInt32(value, str);
+}
+
 void MessageOut::writeInt64(const int64_t value, const char *const str)
 {
     DEBUGLOG2("writeInt64: " + toStringPrint(CAST_U32(value)),
diff --git a/src/net/messageout.h b/src/net/messageout.h
index 9cf9b7e3e..e158430d6 100644
--- a/src/net/messageout.h
+++ b/src/net/messageout.h
@@ -61,6 +61,9 @@ class MessageOut notfinal
         void writeInt32(const int32_t value,
                         const char *const str);
 
+        void writeItemId(const int32_t value,
+                         const char *const str);
+
         void writeInt64(const int64_t value,
                         const char *const str);
 
diff --git a/src/net/tmwa/loginhandler.cpp b/src/net/tmwa/loginhandler.cpp
index 0aa086831..b097d9040 100644
--- a/src/net/tmwa/loginhandler.cpp
+++ b/src/net/tmwa/loginhandler.cpp
@@ -33,6 +33,7 @@
 #include "debug.h"
 
 extern unsigned int tmwServerVersion;
+extern int itemIdLen;
 
 namespace TmwAthena
 {
@@ -137,6 +138,7 @@ void LoginHandler::ping() const
 
 void LoginHandler::updatePacketVersion() const
 {
+    itemIdLen = 2;
 }
 
 }  // namespace TmwAthena
diff --git a/src/net/tmwa/loginrecv.cpp b/src/net/tmwa/loginrecv.cpp
index 67e6b21e8..91d11b05e 100644
--- a/src/net/tmwa/loginrecv.cpp
+++ b/src/net/tmwa/loginrecv.cpp
@@ -41,6 +41,7 @@
 #include "debug.h"
 
 extern int packetVersion;
+extern int itemIdLen;
 
 namespace TmwAthena
 {
@@ -55,6 +56,7 @@ enum ServerFlags
 void LoginRecv::processServerVersion(Net::MessageIn &msg)
 {
     packetVersion = 0;
+    itemIdLen = 2;
     const uint8_t b1 = msg.readUInt8("b1");  // -1
     const uint8_t b2 = msg.readUInt8("b2");
     const uint8_t b3 = msg.readUInt8("b3");
diff --git a/src/net/tmwa/updateprotocol.cpp b/src/net/tmwa/updateprotocol.cpp
index 78aa2031b..0726bed6c 100644
--- a/src/net/tmwa/updateprotocol.cpp
+++ b/src/net/tmwa/updateprotocol.cpp
@@ -25,11 +25,14 @@
 
 #include "debug.h"
 
+extern int itemIdLen;
+
 namespace TmwAthena
 {
 
 void updateProtocol()
 {
+    itemIdLen = 2;
 #define PACKETS_UPDATE
 #include "net/protocoloutupdate.h"
 #include "net/tmwa/packetsout.inc"
diff --git a/src/progs/dyecmd/client.cpp b/src/progs/dyecmd/client.cpp
index 385a50919..a905c326b 100644
--- a/src/progs/dyecmd/client.cpp
+++ b/src/progs/dyecmd/client.cpp
@@ -126,6 +126,7 @@ int packetVersionMain = 0;
 int packetVersionRe = 0;
 int packetVersionZero = 0;
 int packetsType = 0;
+int itemIdLen = 2;
 bool packets_main = true;
 bool packets_re = false;
 bool packets_zero = false;
diff --git a/src/progs/manaplus/client.cpp b/src/progs/manaplus/client.cpp
index f9f608102..880f05a0b 100644
--- a/src/progs/manaplus/client.cpp
+++ b/src/progs/manaplus/client.cpp
@@ -195,6 +195,7 @@ int packetVersionMain = 0;
 int packetVersionRe = 0;
 int packetVersionZero = 0;
 int packetsType = 0;
+int itemIdLen = 2;
 bool packets_main = true;
 bool packets_re = false;
 bool packets_zero = false;