From 2f2fe54d0f0d9baabc5679a043249a77aa6e7027 Mon Sep 17 00:00:00 2001
From: Fangliding <Fangliding.fshxy@outlook.com>
Date: Sat, 26 Sep 2026 16:52:40 +0800
Subject: [PATCH] bug fix

---
 infra/conf/shadowsocks.go               | 3 +++
 proxy/shadowsocks_2022/inbound_multi.go | 4 +---
 proxy/shadowsocks_2022/relay_test.go    | 3 +--
 proxy/shadowsocks_2022/replay.go        | 3 +--
 proxy/shadowsocks_2022/stream.go        | 8 ++++----
 5 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/infra/conf/shadowsocks.go b/infra/conf/shadowsocks.go
index 9032dad3f..13862dd83 100644
--- a/infra/conf/shadowsocks.go
+++ b/infra/conf/shadowsocks.go
@@ -109,12 +109,14 @@ func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
 }
 
 func buildShadowsocks2022(v *ShadowsocksServerConfig) (proto.Message, error) {
+	v.Cipher = strings.ToLower(v.Cipher)
 	if len(v.Users) == 0 {
 		config := new(shadowsocks_2022.ServerConfig)
 		config.Method = v.Cipher
 		config.Key = v.Password
 		config.Network = v.NetworkList.Build()
 		config.Email = v.Email
+		config.Level = int32(v.Level)
 		return config, nil
 	}
 
@@ -169,6 +171,7 @@ func buildShadowsocks2022(v *ShadowsocksServerConfig) (proto.Message, error) {
 			Email:   user.Email,
 			Address: user.Address.Build(),
 			Port:    uint32(user.Port),
+			Level:   int32(user.Level),
 		})
 	}
 	return config, nil
diff --git a/proxy/shadowsocks_2022/inbound_multi.go b/proxy/shadowsocks_2022/inbound_multi.go
index 6a8251bb8..45df40e53 100644
--- a/proxy/shadowsocks_2022/inbound_multi.go
+++ b/proxy/shadowsocks_2022/inbound_multi.go
@@ -431,8 +431,6 @@ func (i *MultiUserInbound) processUDP(ctx context.Context, conn stat.Connection,
 			}
 
 			payload := bodyPlain[offset+addrLen:]
-			payloadCopy := make([]byte, len(payload))
-			copy(payloadCopy, payload)
 
 			entry, ok := udpConns.Load(sessionID)
 			if !ok {
@@ -496,7 +494,7 @@ func (i *MultiUserInbound) processUDP(ctx context.Context, conn stat.Connection,
 
 			entry.timer.Update()
 			pBuf := buf.New()
-			pBuf.Write(payloadCopy)
+			pBuf.Write(payload)
 			_ = entry.link.Writer.WriteMultiBuffer(buf.MultiBuffer{pBuf})
 		}
 	}
diff --git a/proxy/shadowsocks_2022/relay_test.go b/proxy/shadowsocks_2022/relay_test.go
index 26834ece5..c981e5d73 100644
--- a/proxy/shadowsocks_2022/relay_test.go
+++ b/proxy/shadowsocks_2022/relay_test.go
@@ -4,14 +4,13 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/binary"
+	"errors"
 	gonet "net"
 	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
 
-	"errors"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
diff --git a/proxy/shadowsocks_2022/replay.go b/proxy/shadowsocks_2022/replay.go
index eb59bae0b..7908371ba 100644
--- a/proxy/shadowsocks_2022/replay.go
+++ b/proxy/shadowsocks_2022/replay.go
@@ -25,8 +25,7 @@ type SlidingWindow struct {
 }
 
 func (f *SlidingWindow) Reset() {
-	f.last = 0
-	f.ring[0] = 0
+	*f = SlidingWindow{}
 }
 
 func (f *SlidingWindow) Check(counter uint64) bool {
diff --git a/proxy/shadowsocks_2022/stream.go b/proxy/shadowsocks_2022/stream.go
index b515df2da..3e21734e7 100644
--- a/proxy/shadowsocks_2022/stream.go
+++ b/proxy/shadowsocks_2022/stream.go
@@ -6,7 +6,7 @@ import (
 	"encoding/binary"
 	"io"
 	"math"
-	mrand "math/rand"
+	mrand "math/rand/v2"
 	"time"
 
 	"github.com/xtls/xray-core/common/buf"
@@ -169,7 +169,7 @@ func (r *StreamReader) Read(p []byte) (int, error) {
 
 	payloadLen := int(binary.BigEndian.Uint16(decryptedLen))
 	if payloadLen == 0 {
-		return 0, nil
+		return 0, ErrInvalidRequest
 	}
 
 	chunkEnd := payloadLen + AEADTagSize
@@ -213,7 +213,7 @@ func (r *StreamReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 
 	payloadLen := int(binary.BigEndian.Uint16(decryptedLen))
 	if payloadLen == 0 {
-		return nil, nil
+		return nil, ErrInvalidRequest
 	}
 
 	chunkEnd := payloadLen + AEADTagSize
@@ -375,7 +375,7 @@ func WriteTCPRequest(w io.Writer, method *CipherMethod, pskList [][]byte, dest n
 	payloadLen := len(payload)
 	var paddingLen int
 	if payloadLen < MaxPaddingLength {
-		paddingLen = mrand.Intn(MaxPaddingLength-payloadLen) + 1
+		paddingLen = mrand.IntN(MaxPaddingLength-payloadLen) + 1
 	}
 	addrPortLen := AddrPortLength(dest)
 	varHeaderLen := addrPortLen + 2 + paddingLen + payloadLen