add AutoBackportQuest DebugOption

config.json

@@ -36,6 +36,7 @@
     "TournamentOverride": 0,
     "DisableTokenCheck": false,
     "QuestTools": false,
+    "AutoQuestBackport": true,
     "ProxyPort": 0,
     "CapLink": {
       "Values": [51728, 20000, 51729, 1, 20000],

config/config.go

@@ -118,6 +118,7 @@ type DebugOptions struct {
 	TournamentOverride  int    // VS Tournament event status
 	DisableTokenCheck   bool   // Disables checking login token exists in the DB (security risk!)
 	QuestTools          bool   // Enable various quest debug logs
+	AutoQuestBackport   bool   // Automatically backport quest files
 	ProxyPort           uint16 // Forces the game to connect to a channel server proxy
 	CapLink             CapLinkOptions
 }

server/channelserver/handlers_quest.go

@@ -2,6 +2,7 @@ package channelserver
 
 import (
 	"database/sql"
+	"encoding/binary"
 	"erupe-ce/common/byteframe"
 	"erupe-ce/common/decryption"
 	ps "erupe-ce/common/pascalstring"
@@ -21,6 +22,20 @@ type tuneValue struct {
 	Value uint16
 }
 
+func BackportQuest(data []byte) []byte {
+	wp := binary.LittleEndian.Uint32(data[0:4]) + 96
+	rp := wp + 4
+	for i := uint32(0); i < 6; i++ {
+		if i != 0 {
+			wp += 4
+			rp += 8
+		}
+		copy(data[wp:wp+4], data[rp:rp+4])
+	}
+	copy(data[wp:wp+180], data[rp:rp+180])
+	return data
+}
+
 func handleMsgSysGetFile(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysGetFile)
 
@@ -63,6 +78,9 @@ func handleMsgSysGetFile(s *Session, p mhfpacket.MHFPacket) {
 			doAckBufSucceed(s, pkt.AckHandle, data)
 			return
 		}
+		if _config.ErupeConfig.RealClientMode <= _config.Z1 && s.server.erupeConfig.DebugOptions.AutoQuestBackport {
+			data = BackportQuest(decryption.UnpackSimple(data))
+		}
 		doAckBufSucceed(s, pkt.AckHandle, data)
 	}
 }
@@ -124,6 +142,9 @@ func loadQuestFile(s *Session, questId int) []byte {
 	}
 
 	decrypted := decryption.UnpackSimple(file)
+	if _config.ErupeConfig.RealClientMode <= _config.Z1 && s.server.erupeConfig.DebugOptions.AutoQuestBackport {
+		decrypted = BackportQuest(decrypted)
+	}
 	fileBytes := byteframe.NewByteFrameFromBytes(decrypted)
 	fileBytes.SetLE()
 	fileBytes.Seek(int64(fileBytes.ReadUint32()), 0)