From e914cf406b9dac4d4202e63c565753046d491045 Mon Sep 17 00:00:00 2001
From: wish <wish@sek.ai>
Date: Wed, 29 Nov 2023 21:37:41 +1100
Subject: [PATCH] limit EnumerateShop responses

---
 network/mhfpacket/msg_mhf_enumerate_shop.go | 4 ++--
 server/channelserver/handlers_shop_gacha.go | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/network/mhfpacket/msg_mhf_enumerate_shop.go b/network/mhfpacket/msg_mhf_enumerate_shop.go
index 153095db4..d57655e98 100644
--- a/network/mhfpacket/msg_mhf_enumerate_shop.go
+++ b/network/mhfpacket/msg_mhf_enumerate_shop.go
@@ -14,7 +14,7 @@ type MsgMhfEnumerateShop struct {
 	AckHandle uint32
 	ShopType  uint8 // 1 running gachas, 10 normal shop extensions, 8 Diva Defense shop
 	ShopID    uint32
-	Unk2      uint16 // 00 80 running gachas, 00 20 normal shop
+	Limit     uint16
 	Unk3      uint8
 	Unk4      uint8
 	Unk5      uint32
@@ -30,7 +30,7 @@ func (m *MsgMhfEnumerateShop) Parse(bf *byteframe.ByteFrame, ctx *clientctx.Clie
 	m.AckHandle = bf.ReadUint32()
 	m.ShopType = bf.ReadUint8()
 	m.ShopID = bf.ReadUint32()
-	m.Unk2 = bf.ReadUint16()
+	m.Limit = bf.ReadUint16()
 	m.Unk3 = bf.ReadUint8()
 	if _config.ErupeConfig.RealClientMode >= _config.G2 {
 		m.Unk4 = bf.ReadUint8()
diff --git a/server/channelserver/handlers_shop_gacha.go b/server/channelserver/handlers_shop_gacha.go
index c18119c6e..01c87ffbd 100644
--- a/server/channelserver/handlers_shop_gacha.go
+++ b/server/channelserver/handlers_shop_gacha.go
@@ -241,6 +241,9 @@ func handleMsgMhfEnumerateShop(s *Session, p mhfpacket.MHFPacket) {
 	case 10: // Item shop, 0-8
 		bf := byteframe.NewByteFrame()
 		items := getShopItems(s, pkt.ShopType, pkt.ShopID)
+		if len(items) > int(pkt.Limit) {
+			items = items[:pkt.Limit]
+		}
 		writeShopItems(bf, items)
 		doAckBufSucceed(s, pkt.AckHandle, bf.Data())
 	}