diff --git a/commands.go b/commands.go
index f469792..098f24f 100644
--- a/commands.go
+++ b/commands.go
@@ -12,10 +12,6 @@ import (
 	"github.com/hahahrfool/v2ray_simple/utils"
 )
 
-const (
-	mmdbDownloadLink = "https://cdn.jsdelivr.net/gh/Loyalsoldier/geoip@release/Country.mmdb"
-)
-
 var (
 	cmdPrintSupportedProtocols bool
 	cmdGenerateUUID            bool
@@ -39,7 +35,7 @@ func generateAndPrintUUID() {
 		return
 	}
 
-	log.Println("Your new randomly generated uuid is : ", utils.GenerateUUIDStr())
+	log.Printf("Your new randomly generated uuid is : %s\n", utils.GenerateUUIDStr())
 }
 
 func mayPrintSupportedProtocols() {
@@ -55,33 +51,36 @@ func tryDownloadMMDB() {
 	if utils.FileExist(utils.GetFilePath(netLayer.GeoipFileName)) {
 		return
 	}
-	log.Println("No GeoLite2-Country.mmdb found,start downloading from " + mmdbDownloadLink)
+
+	const mmdbDownloadLink = "https://cdn.jsdelivr.net/gh/Loyalsoldier/geoip@release/Country.mmdb"
+
+	log.Printf("No GeoLite2-Country.mmdb found,start downloading from%s\n", mmdbDownloadLink)
 
 	resp, err := http.Get(mmdbDownloadLink)
 
 	if err != nil {
-		log.Println("Download mmdb failed", err)
+		log.Printf("Download mmdb failed%s\n", err)
 		return
 	}
 	defer resp.Body.Close()
 
 	out, err := os.Create(netLayer.GeoipFileName)
 	if err != nil {
-		log.Println("Download mmdb but Can't CreateFile,", err)
+		log.Printf("Download mmdb but Can't CreateFile,%s\n", err)
 		return
 	}
 	defer out.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		log.Println("Download mmdb bad status:", resp.Status)
+		log.Printf("Download mmdb bad status:%s\n", resp.Status)
 		return
 	}
 
 	_, err = io.Copy(out, resp.Body)
 	if err != nil {
-		log.Println("Write downloaded mmdb to file err:", err)
+		log.Printf("Write downloaded mmdb to file err:%s\n", err)
 		return
 	}
-	log.Println("Download mmdb success!")
+	log.Printf("Download mmdb success!\n")
 
 }
diff --git a/configs.go b/configs.go
index 7e7e1f2..44d5c5c 100644
--- a/configs.go
+++ b/configs.go
@@ -33,7 +33,7 @@ func loadConfig() {
 			standardConf, err = proxy.LoadTomlConfFile(fpath)
 			if err != nil {
 
-				log.Fatalln("can not load standard config file: ", err)
+				log.Fatalf("can not load standard config file: %s\n", err)
 			}
 			//log.Println("standardConf.Fallbacks: ", len(standardConf.Fallbacks))
 			if len(standardConf.Fallbacks) != 0 {
@@ -53,10 +53,11 @@ func loadConfig() {
 			//默认认为所有其他后缀的都是json格式，因为有时我会用 server.json.vless 这种写法
 			// 默认所有json格式的文件都为 极简模式
 
-			simpleConf, err = proxy.LoadSimpleConfigFile(fpath)
-			if err != nil {
+			var hasE bool
+			simpleConf, hasE, err = proxy.LoadSimpleConfigFile(fpath)
+			if hasE {
 
-				log.Fatalln("can not load simple config file: ", err)
+				log.Fatalf("can not load simple config file: %s\n", err)
 			}
 			if simpleConf.Fallbacks != nil {
 				mainFallback = httpLayer.NewClassicFallbackFromConfList(simpleConf.Fallbacks)
@@ -70,15 +71,15 @@ func loadConfig() {
 		}
 
 	} else {
-		log.Println("No Such Config File:", configFileName, ",will try using -L parameter ")
+		log.Printf("No Such Config File:%s,will try using -L parameter \n", configFileName)
 		if listenURL != "" {
 			_, err = url.Parse(listenURL)
 			if err != nil {
-				log.Fatalln("listenURL given but invalid ", listenURL, err)
+				log.Fatalf("listenURL given but invalid %s %s\n", listenURL, err)
 
 			}
 
-			simpleConf = &proxy.Simple{
+			simpleConf = proxy.Simple{
 				Server_ThatListenPort_Url: listenURL,
 			}
 
@@ -86,7 +87,7 @@ func loadConfig() {
 
 				_, err = url.Parse(dialURL)
 				if err != nil {
-					log.Fatalln("dialURL given but invalid ", dialURL, err)
+					log.Fatalf("dialURL given but invalid %s %s\n", dialURL, err)
 
 				}
 
@@ -94,7 +95,7 @@ func loadConfig() {
 			}
 
 		} else {
-			log.Fatalln("no -L listen URL provided ")
+			log.Fatalf("no -L listen URL provided \n")
 
 		}
 	}
diff --git a/grpc/conn.go b/grpc/conn.go
index 401f4b5..3f97c90 100644
--- a/grpc/conn.go
+++ b/grpc/conn.go
@@ -32,7 +32,7 @@ func (c *Conn) Read(b []byte) (n int, err error) {
 	if c.cacheReader == nil {
 		h, err := c.stream.Recv()
 		if err != nil {
-			return 0, utils.NewErr("unable to read from gun tunnel", err)
+			return 0, utils.ErrInErr{ErrDesc: "unable to read from gun tunnel", ErrDetail: err}
 		}
 		c.cacheReader = bytes.NewReader(h.Data)
 	}
@@ -47,7 +47,7 @@ func (c *Conn) Read(b []byte) (n int, err error) {
 func (c *Conn) Write(b []byte) (n int, err error) {
 	err = c.stream.Send(&Hunk{Data: b})
 	if err != nil {
-		return 0, utils.NewErr("Unable to send data over stream service", err)
+		return 0, utils.ErrInErr{ErrDesc: "Unable to send data over stream service", ErrDetail: err}
 	}
 	return len(b), nil
 }
diff --git a/httpLayer/fallback.go b/httpLayer/fallback.go
index 5416ae9..2eaff6a 100644
--- a/httpLayer/fallback.go
+++ b/httpLayer/fallback.go
@@ -333,14 +333,14 @@ func NewClassicFallbackFromConfList(fcl []*FallbackConf) *ClassicFallback {
 	return cfb
 }
 
-func (cfb *ClassicFallback) InsertFallbackConditionSet(condition FallbackConditionSet, addr *netLayer.Addr) {
+func (cfb *ClassicFallback) InsertFallbackConditionSet(condition FallbackConditionSet, addr netLayer.Addr) {
 
 	theMap := cfb.Map
 
 	ftype := condition.GetType()
 	cfb.supportedTypeMask |= ftype
 
-	theMap[condition] = addr
+	theMap[condition] = &addr
 }
 
 func (cfb *ClassicFallback) FirstBuffer() *bytes.Buffer {
diff --git a/main.go b/main.go
index d7987c0..679a368 100644
--- a/main.go
+++ b/main.go
@@ -41,11 +41,11 @@ var (
 
 	uniqueTestDomain string //有时需要测试到单一网站的流量，此时为了避免其它干扰，需要在这里声明 一下 该域名，然后程序里会进行过滤
 
-	confMode        int = -1 //0: simple json, 1: standard toml, 2: v2ray compatible json
-	simpleConf      *proxy.Simple
-	standardConf    *proxy.Standard
-	directClient, _ = proxy.ClientFromURL("direct://")
-	default_uuid    string
+	confMode           int = -1 //0: simple json, 1: standard toml, 2: v2ray compatible json
+	simpleConf         proxy.Simple
+	standardConf       proxy.Standard
+	directClient, _, _ = proxy.ClientFromURL("direct://")
+	default_uuid       string
 
 	allServers = make([]proxy.Server, 0, 8)
 	allClients = make([]proxy.Client, 0, 8)
@@ -138,11 +138,9 @@ func main() {
 		netLayer.UseReadv = usereadv_beforeLoadConfigFile
 	}
 
-	fmt.Println("Log Level:", utils.LogLevel)
-	fmt.Println("UseReadv:", netLayer.UseReadv)
-	if utils.CanLogDebug() {
-		fmt.Println("MaxBufSize", utils.MaxBufLen)
-	}
+	//Printf不会发生 escapes to heap 现象，所以我们统一用 Printf
+	fmt.Printf("Log Level:%d\n", utils.LogLevel)
+	fmt.Printf("UseReadv:%t\n", netLayer.UseReadv)
 
 	runPreCommands()
 
@@ -153,9 +151,10 @@ func main() {
 	//load server and routePolicy
 	switch confMode {
 	case simpleMode:
-		defaultInServer, err = proxy.ServerFromURL(simpleConf.Server_ThatListenPort_Url)
-		if err != nil {
-			log.Fatalln("can not create local server: ", err)
+		var hase bool
+		defaultInServer, hase, err = proxy.ServerFromURL(simpleConf.Server_ThatListenPort_Url)
+		if hase {
+			log.Fatalf("can not create local server: %s\n", err)
 		}
 
 		if !defaultInServer.CantRoute() && simpleConf.Route != nil {
@@ -217,8 +216,9 @@ func main() {
 	// load client
 	switch confMode {
 	case simpleMode:
-		defaultOutClient, err = proxy.ClientFromURL(simpleConf.Client_ThatDialRemote_Url)
-		if err != nil {
+		var hase bool
+		defaultOutClient, hase, err = proxy.ClientFromURL(simpleConf.Client_ThatDialRemote_Url)
+		if hase {
 			log.Fatalln("can not create remote client: ", err)
 		}
 	case standardMode:
@@ -274,14 +274,14 @@ func listenSer(inServer proxy.Server, defaultOutClientForThis proxy.Client) {
 
 		handleFunc := inServer.HandleInitialLayersFunc()
 		if handleFunc == nil {
-			log.Fatal("inServer.IsHandleInitialLayers but inServer.HandleInitialLayersFunc() returns nil")
+			log.Fatalf("inServer.IsHandleInitialLayers but inServer.HandleInitialLayersFunc() returns nil\n")
 		}
 
 		newConnChan, baseConn := handleFunc()
 		if newConnChan == nil {
 			//baseConn可以为nil，quic就是如此
 			if utils.CanLogErr() {
-				log.Println("StarthandleInitialLayers can't extablish baseConn")
+				log.Printf("StarthandleInitialLayers can't extablish baseConn\n")
 			}
 			return
 		}
@@ -291,7 +291,7 @@ func listenSer(inServer proxy.Server, defaultOutClientForThis proxy.Client) {
 				newConn, ok := <-newConnChan
 				if !ok {
 					if utils.CanLogErr() {
-						log.Println("read from SuperProxy not ok")
+						log.Printf("read from SuperProxy not ok\n")
 
 					}
 
@@ -313,7 +313,7 @@ func listenSer(inServer proxy.Server, defaultOutClientForThis proxy.Client) {
 		}()
 
 		if utils.CanLogInfo() {
-			log.Println(proxy.GetFullName(inServer), "is listening ", inServer.Network(), "on", inServer.AddrStr())
+			log.Printf("%s is listening %s on %s\n", proxy.GetFullName(inServer), inServer.Network(), inServer.AddrStr())
 
 		}
 		return
@@ -328,13 +328,13 @@ func listenSer(inServer proxy.Server, defaultOutClientForThis proxy.Client) {
 
 	if err == nil {
 		if utils.CanLogInfo() {
-			log.Println(proxy.GetFullName(inServer), "is listening ", network, "on", inServer.AddrStr())
+			log.Printf("%s is listening %s on %s\n", proxy.GetFullName(inServer), network, inServer.AddrStr())
 
 		}
 
 	} else {
 		if err != nil {
-			log.Fatalln("can not listen inServer on", inServer.AddrStr(), err)
+			log.Fatalf("can not listen inServer on %s %s\n", inServer.AddrStr(), err)
 
 		}
 	}
@@ -392,7 +392,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 
 	if utils.CanLogInfo() {
 		str := wrappedConn.RemoteAddr().String()
-		log.Println("New Accepted Conn from", str, ", being handled by "+proxy.GetVSI_url(inServer))
+		log.Printf("New Accepted Conn from %s , being handled by %s\n", str, proxy.GetVSI_url(inServer))
 
 		iics.cachedRemoteAddr = str
 	}
@@ -419,7 +419,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 		if err != nil {
 
 			if utils.CanLogErr() {
-				log.Println("failed in inServer tls handshake ", inServer.AddrStr(), err)
+				log.Printf("failed in inServer tls handshake %s %s\n", inServer.AddrStr(), err)
 
 			}
 			wrappedConn.Close()
@@ -450,7 +450,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 			// 我们直接循环监听然后分别用 新goroutine发向 handshakeInserver_and_passToOutClient
 
 			if utils.CanLogDebug() {
-				log.Println("start upgrade grpc")
+				log.Printf("start upgrade grpc\n")
 			}
 
 			grpcs := inServer.GetGRPC_Server() //这个grpc server是在配置阶段初始化好的.
@@ -464,7 +464,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 				newGConn, ok := <-grpcs.NewConnChan
 				if !ok {
 					if utils.CanLogWarn() {
-						log.Println("grpc getNewSubConn not ok")
+						log.Printf("grpc getNewSubConn not ok\n")
 					}
 
 					iics.baseLocalConn.Close()
@@ -487,12 +487,12 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 			if re != nil {
 				if re == httpLayer.ErrNotHTTP_Request {
 					if utils.CanLogErr() {
-						log.Println("ws: got not http request ", inServer.AddrStr())
+						log.Printf("ws: got not http request %s\n", inServer.AddrStr())
 					}
 
 				} else {
 					if utils.CanLogErr() {
-						log.Println("ws: handshake read error ", inServer.AddrStr())
+						log.Printf("ws: handshake read error %s\n", inServer.AddrStr())
 					}
 				}
 
@@ -507,7 +507,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 				iics.theFallbackFirstBuffer = rp.WholeRequestBuf
 
 				if utils.CanLogDebug() {
-					log.Println("ws path not match", rp.Method, rp.Path, "should be:", wss.Thepath)
+					log.Printf("ws path not match %s %s should be: %s\n", rp.Method, rp.Path, wss.Thepath)
 
 				}
 
@@ -520,7 +520,7 @@ func handleNewIncomeConnection(inServer proxy.Server, defaultClientForThis proxy
 			wsConn, err := wss.Handshake(rp.WholeRequestBuf, wrappedConn)
 			if err != nil {
 				if utils.CanLogErr() {
-					log.Println("failed in inServer websocket handshake ", inServer.AddrStr(), err)
+					log.Printf("failed in inServer websocket handshake %s %s\n", inServer.AddrStr(), err)
 
 				}
 
@@ -550,7 +550,7 @@ func handshakeInserver_and_passToOutClient(iics incomingInserverConnState) {
 	inServer := iics.inServer
 
 	var wlc io.ReadWriteCloser
-	var targetAddr *netLayer.Addr
+	var targetAddr netLayer.Addr
 	var err error
 
 	if iics.shouldFallback {
@@ -571,7 +571,7 @@ func handshakeInserver_and_passToOutClient(iics incomingInserverConnState) {
 	wlc = nil
 
 	if utils.CanLogWarn() {
-		log.Println("failed in inServer proxy handshake from", inServer.AddrStr(), err)
+		log.Printf("failed in inServer proxy handshake from %s %s\n", inServer.AddrStr(), err)
 	}
 
 	if !inServer.CanFallback() {
@@ -591,7 +591,7 @@ func handshakeInserver_and_passToOutClient(iics incomingInserverConnState) {
 		iics.theFallbackFirstBuffer = fe.First
 		if iics.theFallbackFirstBuffer == nil {
 			//不应该，至少能读到1字节的。
-			log.Fatal("No FirstBuffer")
+			log.Fatalf("No FirstBuffer\n")
 		}
 	}
 
@@ -602,7 +602,7 @@ checkFallback:
 	if mainFallback != nil {
 
 		if utils.CanLogDebug() {
-			log.Println("checkFallback")
+			log.Printf("checkFallback\n")
 		}
 
 		var thisFallbackType byte
@@ -649,10 +649,10 @@ checkFallback:
 		fbAddr := mainFallback.GetFallback(thisFallbackType, fallback_params...)
 
 		if utils.CanLogDebug() {
-			log.Println("checkFallback ,matched fallback:", fbAddr)
+			log.Printf("checkFallback ,matched fallback: %s\n", fbAddr.String())
 		}
 		if fbAddr != nil {
-			targetAddr = fbAddr
+			targetAddr = *fbAddr
 			wlc = wrappedConn
 			goto afterLocalServerHandshake
 		}
@@ -661,7 +661,7 @@ checkFallback:
 
 	//默认回落, 每个listen配置 都可 有一个自己独享的默认回落
 
-	if defaultFallbackAddr := inServer.GetFallback(); defaultFallbackAddr != nil {
+	if defaultFallbackAddr := inServer.GetFallback(); !defaultFallbackAddr.IsEmpty() {
 
 		targetAddr = defaultFallbackAddr
 		wlc = wrappedConn
@@ -673,7 +673,7 @@ afterLocalServerHandshake:
 	if wlc == nil {
 		//无wlc证明 inServer 握手失败，且 没有任何回落可用, 直接return
 		if utils.CanLogDebug() {
-			log.Println("invalid request and no matched fallback, hung up.")
+			log.Printf("invalid request and no matched fallback, hung up.\n")
 		}
 		wrappedConn.Close()
 		return
@@ -692,7 +692,7 @@ afterLocalServerHandshake:
 		}
 
 		if utils.CanLogDebug() {
-			log.Println("try routing", desc)
+			log.Printf("try routing %v\n", desc)
 		}
 
 		outtag := routePolicy.GetOutTag(desc)
@@ -702,7 +702,7 @@ afterLocalServerHandshake:
 			iics.routedToDirect = true
 
 			if utils.CanLogInfo() {
-				log.Println("routed to direct", targetAddr.UrlString())
+				log.Printf("routed to direct %s\n", targetAddr.UrlString())
 			}
 		} else {
 			//log.Println("outtag", outtag, clientsTagMap)
@@ -710,7 +710,7 @@ afterLocalServerHandshake:
 			if tagC, ok := clientsTagMap[outtag]; ok {
 				client = tagC
 				if utils.CanLogInfo() {
-					log.Println("routed to", outtag, proxy.GetFullName(client))
+					log.Printf("routed to %s %s\n", outtag, proxy.GetFullName(client))
 				}
 			}
 		}
@@ -743,7 +743,7 @@ afterLocalServerHandshake:
 	if isTlsLazy_clientEnd || iics.isTlsLazyServerEnd {
 
 		if tlsLayer.PDD {
-			log.Println("loading TLS SniffConn", isTlsLazy_clientEnd, iics.isTlsLazyServerEnd)
+			log.Printf("loading TLS SniffConn %t %t\n", isTlsLazy_clientEnd, iics.isTlsLazyServerEnd)
 		}
 
 		wlc = tlsLayer.NewSniffConn(iics.baseLocalConn, wlc, isTlsLazy_clientEnd, tls_lazy_secure)
@@ -836,7 +836,7 @@ afterLocalServerHandshake:
 
 				unknownRemoteAddrMsgWriter = theCRUMFURS
 
-				uniExtractor := netLayer.NewUniUDP_Extractor(targetAddr.ToUDPAddr(), wlc, unknownRemoteAddrMsgWriter)
+				uniExtractor := netLayer.NewUniUDP_Extractor(*targetAddr.ToUDPAddr(), wlc, unknownRemoteAddrMsgWriter)
 
 				netLayer.RelayUDP_to_Direct(uniExtractor) //阻塞
 
@@ -847,7 +847,7 @@ afterLocalServerHandshake:
 			// 此时socks5包已经帮我们dial好了一个udp连接，即wlc，但是还未读取到客户端想要访问的东西
 			udpConn := wlc.(*socks5.UDPConn)
 
-			dialFunc := func(targetAddr *netLayer.Addr) (io.ReadWriter, error) {
+			dialFunc := func(targetAddr netLayer.Addr) (io.ReadWriter, error) {
 				return dialClient(incomingInserverConnState{}, targetAddr, client, false, nil, true)
 			}
 
@@ -871,7 +871,7 @@ afterLocalServerHandshake:
 
 			} else {
 				if utils.CanLogErr() {
-					log.Println("socks5 server -> client for udp, but client didn't implement netLayer.UDP_Putter", client.Name())
+					log.Printf("socks5 server -> client for udp, but client didn't implement netLayer.UDP_Putter, %s\n", client.Name())
 				}
 			}
 			return
@@ -892,7 +892,7 @@ afterLocalServerHandshake:
 //client为真实要拨号的client，可能会与iics里的defaultClient不同。以client为准。
 // wlc为调用者所提供的 此请求的 来源 链接。wlc主要用于 Copy阶段.
 // noCopy是为了让其它调用者自行处理 转发 时使用。
-func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, client proxy.Client, isTlsLazy_clientEnd bool, wlc io.ReadWriteCloser, noCopy bool) (io.ReadWriter, error) {
+func dialClient(iics incomingInserverConnState, targetAddr netLayer.Addr, client proxy.Client, isTlsLazy_clientEnd bool, wlc io.ReadWriteCloser, noCopy bool) (io.ReadWriter, error) {
 
 	if iics.shouldCloseInSerBaseConnWhenFinish && !noCopy {
 		if iics.baseLocalConn != nil {
@@ -906,18 +906,18 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 
 	//direct的话自己是没有目的地址的，直接使用 请求的地址
 	// 而其它代理的话, realTargetAddr会被设成实际配置的代理的地址
-	var realTargetAddr *netLayer.Addr = targetAddr
+	var realTargetAddr netLayer.Addr = targetAddr
 
 	if uniqueTestDomain != "" && uniqueTestDomain != targetAddr.Name {
 		if utils.CanLogDebug() {
-			log.Println("request isn't the appointed domain", targetAddr, uniqueTestDomain)
+			log.Printf("request isn't the appointed domain, %s, %s\n", targetAddr.String(), uniqueTestDomain)
 
 		}
 		return nil, utils.NumErr{N: 1, Prefix: "dialClient err, "}
 	}
 
 	if utils.CanLogInfo() {
-		log.Println(iics.cachedRemoteAddr, " request ", targetAddr.UrlString(), "through", proxy.GetVSI_url(client))
+		log.Printf("%s request %s through %s\n", iics.cachedRemoteAddr, targetAddr.UrlString(), proxy.GetVSI_url(client))
 
 	}
 
@@ -926,7 +926,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 
 		realTargetAddr, err = netLayer.NewAddr(client.AddrStr())
 		if err != nil {
-			log.Fatal("convert addr err:", err)
+			log.Fatalf("convert addr err:%s\n", err)
 		}
 		realTargetAddr.Network = client.Network()
 	}
@@ -943,7 +943,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 	switch client.AdvancedLayer() {
 	case "grpc":
 
-		grpcClientConn = grpc.GetEstablishedConnFor(realTargetAddr)
+		grpcClientConn = grpc.GetEstablishedConnFor(&realTargetAddr)
 
 		if grpcClientConn != nil {
 			//如果有已经建立好的连接，则跳过拨号阶段
@@ -951,7 +951,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 		}
 	case "quic":
 		//quic这里并不是在tls层基础上进行dial，而是直接dial
-		dailedCommonConn = client.DialCommonInitialLayerConnFunc()(realTargetAddr)
+		dailedCommonConn = client.DialCommonInitialLayerConnFunc()(&realTargetAddr)
 		if dailedCommonConn != nil {
 			//如果有已经建立好的连接，则跳过拨号阶段
 			goto advLayerStep
@@ -965,7 +965,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 	clientConn, err = realTargetAddr.Dial()
 	if err != nil {
 		if utils.CanLogErr() {
-			log.Println("failed in dial", realTargetAddr.String(), ", Reason: ", err)
+			log.Printf("failed in dial %s , Reason: , %s\n", realTargetAddr.String(), err)
 
 		}
 		return nil, utils.NumErr{N: 2, Prefix: "dialClient err, "}
@@ -986,7 +986,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 				// 而且为了避免黑客攻击或探测，我们要使用uuid作为特殊指令，此时需要 UserServer和 UserClient
 
 				if uc := client.(proxy.UserClient); uc != nil {
-					tryTlsLazyRawCopy(true, uc, nil, targetAddr, clientConn, wlc, nil, true, nil)
+					tryTlsLazyRawCopy(true, uc, nil, &targetAddr, clientConn, wlc, nil, true, nil)
 
 				}
 
@@ -1002,7 +1002,7 @@ func dialClient(iics incomingInserverConnState, targetAddr *netLayer.Addr, clien
 
 		tlsConn, err := client.GetTLS_Client().Handshake(clientConn)
 		if err != nil {
-			log.Println("failed in handshake outClient tls", targetAddr.String(), ", Reason: ", err)
+			log.Printf("failed in handshake outClient tls %s, Reason: %s\n", targetAddr.String(), err)
 			return nil, utils.NumErr{N: 4, Prefix: "dialClient err, "}
 		}
 
@@ -1020,16 +1020,16 @@ advLayerStep:
 			clientConn, err = client.DialSubConnFunc()(dailedCommonConn)
 			if err != nil {
 				if utils.CanLogErr() {
-					log.Println("DialSubConnFunc failed,", err)
+					log.Printf("DialSubConnFunc failed, %s\n", err)
 				}
 				return nil, utils.NumErr{N: 14, Prefix: "DialSubConnFunc err, "}
 			}
 		case "grpc":
 			if grpcClientConn == nil {
-				grpcClientConn, err = grpc.ClientHandshake(clientConn, realTargetAddr)
+				grpcClientConn, err = grpc.ClientHandshake(clientConn, &realTargetAddr)
 				if err != nil {
 					if utils.CanLogErr() {
-						log.Println("grpc.ClientHandshake failed,", err)
+						log.Printf("grpc.ClientHandshake failed, %s\n", err)
 
 					}
 					if iics.baseLocalConn != nil {
@@ -1041,10 +1041,10 @@ advLayerStep:
 
 			}
 
-			clientConn, err = grpc.DialNewSubConn(client.Path(), grpcClientConn, realTargetAddr)
+			clientConn, err = grpc.DialNewSubConn(client.Path(), grpcClientConn, &realTargetAddr)
 			if err != nil {
 				if utils.CanLogErr() {
-					log.Println("grpc.DialNewSubConn failed,", err)
+					log.Printf("grpc.DialNewSubConn failed,%s\n", err)
 
 					//如果底层tcp连接被关闭了的话，错误会是：
 					// rpc error: code = Unavailable desc = connection error: desc = "transport: failed to write client preface: tls: use of closed connection"
@@ -1068,7 +1068,7 @@ advLayerStep:
 				n, e := wlc.Read(edBuf)
 				if e != nil {
 					if utils.CanLogErr() {
-						log.Println("err when reading ws early data", e)
+						log.Printf("err when reading ws early data %s\n", e)
 					}
 					return nil, utils.NumErr{N: 7, Prefix: "dialClient err, "}
 				}
@@ -1093,7 +1093,7 @@ advLayerStep:
 			//wc, err := wsClient.Handshake(clientConn, ed)
 			if err != nil {
 				if utils.CanLogErr() {
-					log.Println("failed in handshake ws to", targetAddr.String(), ", Reason: ", err)
+					log.Printf("failed in handshake ws to %s , Reason: %s\n", targetAddr.String(), err)
 
 				}
 				return nil, utils.NumErr{N: 8, Prefix: "dialClient err, "}
@@ -1105,10 +1105,10 @@ advLayerStep:
 
 	////////////////////////////// 代理层 握手阶段 /////////////////////////////////////
 
-	wrc, err := client.Handshake(clientConn, targetAddr)
+	wrc, err := client.Handshake(clientConn, &targetAddr)
 	if err != nil {
 		if utils.CanLogErr() {
-			log.Println("failed in handshake to", targetAddr.String(), ", Reason: ", err)
+			log.Printf("failed in handshake to %s , Reason: %s\n", targetAddr.String(), err)
 
 		}
 		return nil, utils.NumErr{N: 9, Prefix: "dialClient err, "}
@@ -1154,7 +1154,7 @@ advLayerStep:
 		utils.PutBytes(iics.theFallbackFirstBuffer.Bytes()) //这个Buf不是从utils.GetBuf创建的，而是从一个 GetBytes的[]byte 包装 的，所以我们要PutBytes，而不是PutBuf
 	}
 
-	netLayer.Relay(realTargetAddr, wlc, wrc)
+	netLayer.Relay(&realTargetAddr, wlc, wrc)
 
 	return wrc, nil
 }
diff --git a/netLayer/addr.go b/netLayer/addr.go
index 4e5cace..47fbac7 100644
--- a/netLayer/addr.go
+++ b/netLayer/addr.go
@@ -48,8 +48,8 @@ func GetRandLocalAddr() string {
 	return "0.0.0.0:" + RandPortStr()
 }
 
-func NewAddrFromUDPAddr(addr *net.UDPAddr) *Addr {
-	return &Addr{
+func NewAddrFromUDPAddr(addr *net.UDPAddr) Addr {
+	return Addr{
 		IP:      addr.IP,
 		Port:    addr.Port,
 		Network: "udp",
@@ -57,27 +57,27 @@ func NewAddrFromUDPAddr(addr *net.UDPAddr) *Addr {
 }
 
 //addrStr格式一般为 host:port ；如果不含冒号，将直接认为该字符串是域名或文件名
-func NewAddr(addrStr string) (*Addr, error) {
+func NewAddr(addrStr string) (Addr, error) {
 	if !strings.Contains(addrStr, ":") {
 		//unix domain socket, 或者域名默认端口的情况
-		return &Addr{Name: addrStr}, nil
+		return Addr{Name: addrStr}, nil
 	}
 
 	return NewAddrByHostPort(addrStr)
 }
 
 //hostPortStr格式 必须为 host:port，本函数不对此检查
-func NewAddrByHostPort(hostPortStr string) (*Addr, error) {
+func NewAddrByHostPort(hostPortStr string) (Addr, error) {
 	host, portStr, err := net.SplitHostPort(hostPortStr)
 	if err != nil {
-		return nil, err
+		return Addr{}, err
 	}
 	if host == "" {
 		host = "127.0.0.1"
 	}
 	port, err := strconv.Atoi(portStr)
 
-	a := &Addr{Port: port}
+	a := Addr{Port: port}
 	if ip := net.ParseIP(host); ip != nil {
 		a.IP = ip
 	} else {
@@ -88,27 +88,27 @@ func NewAddrByHostPort(hostPortStr string) (*Addr, error) {
 
 // 如 tcp://127.0.0.1:443 , tcp://google.com:443 ;
 // 不支持unix domain socket, 因为它是文件路径, / 还需要转义，太麻烦;不是我们代码麻烦, 而是怕用户嫌麻烦
-func NewAddrByURL(addrStr string) (*Addr, error) {
+func NewAddrByURL(addrStr string) (Addr, error) {
 
 	u, err := url.Parse(addrStr)
 	if err != nil {
-		return nil, err
+		return Addr{}, err
 	}
 	if u.Scheme == "unix" {
-		return nil, errors.New("parse unix domain socket by url is not supported")
+		return Addr{}, errors.New("parse unix domain socket by url is not supported")
 	}
 	addrStr = u.Host
 
 	host, portStr, err := net.SplitHostPort(addrStr)
 	if err != nil {
-		return nil, err
+		return Addr{}, err
 	}
 	if host == "" {
 		host = "127.0.0.1"
 	}
 	port, err := strconv.Atoi(portStr)
 
-	a := &Addr{Port: port}
+	a := Addr{Port: port}
 	if ip := net.ParseIP(host); ip != nil {
 		a.IP = ip
 	} else {
@@ -121,7 +121,7 @@ func NewAddrByURL(addrStr string) (*Addr, error) {
 }
 
 //会根据thing的类型 生成实际addr； 可以为数字端口，或者带冒号的字符串，或者一个 文件路径(unix domain socket)
-func NewAddrFromAny(thing any) (addr *Addr, err error) {
+func NewAddrFromAny(thing any) (addr Addr, err error) {
 	var integer int
 	var dest_type byte = 0 //0: port, 1: ip:port, 2: unix domain socket
 	var dest_string string
@@ -130,7 +130,7 @@ func NewAddrFromAny(thing any) (addr *Addr, err error) {
 	case float64: //json 默认把数字转换成float64，就算是整数也一样
 
 		if value > 65535 || value < 1 {
-			err = utils.NewDataErr("int port not valid", nil, value)
+			err = utils.ErrInErr{ErrDesc: "int port not valid", Data: value}
 			return
 		}
 
@@ -152,24 +152,24 @@ func NewAddrFromAny(thing any) (addr *Addr, err error) {
 		}
 
 	default:
-		err = utils.NewDataErr("Fallback dest config type err", nil, reflect.TypeOf(thing))
+		err = utils.ErrInErr{ErrDesc: "Fallback dest config type err", Data: reflect.TypeOf(thing)}
 		return
 	}
 
 	switch dest_type {
 	case 0:
-		addr = &Addr{
+		addr = Addr{
 			IP:   net.IPv4(127, 0, 0, 1),
 			Port: integer,
 		}
 	case 1:
 		addr, err = NewAddrByHostPort(dest_string)
 		if err != nil {
-			err = utils.NewDataErr("addr create with given string failed", err, dest_string)
+			err = utils.ErrInErr{ErrDesc: "addr create with given string failed", ErrDetail: err, Data: dest_string}
 			return
 		}
 	case 2:
-		addr = &Addr{
+		addr = Addr{
 			Network: "unix",
 			Name:    dest_string,
 		}
@@ -212,6 +212,10 @@ func (a *Addr) UrlString() string {
 
 }
 
+func (a *Addr) IsEmpty() bool {
+	return a.Name == "" && len(a.IP) == 0 && a.Network == "" && a.Port == 0
+}
+
 func (a *Addr) GetNetIPAddr() (na netip.Addr) {
 	if len(a.IP) < 1 {
 		return
diff --git a/netLayer/listen.go b/netLayer/listen.go
index 2baa76a..bc662b8 100644
--- a/netLayer/listen.go
+++ b/netLayer/listen.go
@@ -70,7 +70,7 @@ func ListenAndAccept(network, addr string, acceptFunc func(net.Conn)) error {
 			}
 			err := os.Remove(addr)
 			if err != nil {
-				return utils.NewDataErr("Error when deleting previous unix socket file,", err, addr)
+				return utils.ErrInErr{ErrDesc: "Error when deleting previous unix socket file,", ErrDetail: err, Data: addr}
 			}
 
 		}
diff --git a/netLayer/route.go b/netLayer/route.go
index 9078985..e1efba2 100644
--- a/netLayer/route.go
+++ b/netLayer/route.go
@@ -10,7 +10,7 @@ import (
 // TargetDescription 可以完整地描述一个网络层/传输层上的一个特定目标,
 // 一般来说，一个具体的监听配置就会分配一个tag
 type TargetDescription struct {
-	Addr *Addr
+	Addr Addr
 	Tag  string
 }
 
@@ -72,7 +72,7 @@ func (sg *RouteSet) IsTransportProtocolAllowed(p uint16) bool {
 	return sg.AllowedTransportLayerProtocols&p > 0
 }
 
-func (sg *RouteSet) IsAddrNetworkAllowed(a *Addr) bool {
+func (sg *RouteSet) IsAddrNetworkAllowed(a Addr) bool {
 
 	if a.Network == "" {
 		return sg.IsTransportProtocolAllowed(TCP)
@@ -91,7 +91,7 @@ func (sg *RouteSet) IsTCPAllowed() bool {
 	return sg.IsTransportProtocolAllowed(TCP)
 }
 
-func (sg *RouteSet) IsAddrIn(a *Addr) bool {
+func (sg *RouteSet) IsAddrIn(a Addr) bool {
 	//我们先过滤传输层，再过滤网络层
 
 	if !sg.IsAddrNetworkAllowed(a) {
diff --git a/netLayer/udp_relay.go b/netLayer/udp_relay.go
index 49cb303..bf96ed8 100644
--- a/netLayer/udp_relay.go
+++ b/netLayer/udp_relay.go
@@ -13,7 +13,7 @@ const (
 //本文件内含 一些 转发 udp 数据的 接口与方法
 
 // 阻塞.
-func RelayUDP(putter UDP_Putter, extractor UDP_Extractor, dialFunc func(targetAddr *Addr) (io.ReadWriter, error)) {
+func RelayUDP(putter UDP_Putter, extractor UDP_Extractor, dialFunc func(targetAddr Addr) (io.ReadWriter, error)) {
 
 	go func() {
 		for {
@@ -43,11 +43,11 @@ func RelayUDP(putter UDP_Putter, extractor UDP_Extractor, dialFunc func(targetAd
 //////////////////// 接口 ////////////////////
 
 type UDPRequestReader interface {
-	GetNewUDPRequest() (*net.UDPAddr, []byte, error)
+	GetNewUDPRequest() (net.UDPAddr, []byte, error)
 }
 
 type UDPResponseWriter interface {
-	WriteUDPResponse(*net.UDPAddr, []byte) error
+	WriteUDPResponse(net.UDPAddr, []byte) error
 }
 
 // UDP_Extractor, 用于从一个虚拟的协议中提取出 udp请求
@@ -61,12 +61,12 @@ type UDP_Extractor interface {
 // 写入一个UDP请求; 可以包裹成任意协议。
 // 因为有时该地址从来没申请过，所以此时就要用dialFunc创建一个新连接
 type UDPRequestWriter interface {
-	WriteUDPRequest(target *net.UDPAddr, request []byte, dialFunc func(targetAddr *Addr) (io.ReadWriter, error)) error
+	WriteUDPRequest(target net.UDPAddr, request []byte, dialFunc func(targetAddr Addr) (io.ReadWriter, error)) error
 }
 
 //拉取一个新的 UDP 响应
 type UDPResponseReader interface {
-	GetNewUDPResponse() (*net.UDPAddr, []byte, error)
+	GetNewUDPResponse() (net.UDPAddr, []byte, error)
 }
 
 // UDP_Putter, 用于把 udp请求转换成 虚拟的协议
@@ -85,14 +85,14 @@ type UDP_Putter interface {
 // 对于 vless v1来说, unknownRemoteAddrMsgWriter 要做的 就是 新建一个与服务端的 请求udp的连接，
 //  然后这个新连接就变成了新的 UniUDP_Putter
 type UniUDP_Putter struct {
-	targetAddr *net.UDPAddr
+	targetAddr net.UDPAddr
 	io.ReadWriter
 
 	unknownRemoteAddrMsgWriter UDPRequestWriter
 }
 
 //
-func (e *UniUDP_Putter) GetNewUDPResponse() (*net.UDPAddr, []byte, error) {
+func (e *UniUDP_Putter) GetNewUDPResponse() (net.UDPAddr, []byte, error) {
 	bs := make([]byte, MaxUDP_packetLen)
 	n, err := e.ReadWriter.Read(bs)
 	if err != nil {
@@ -101,7 +101,7 @@ func (e *UniUDP_Putter) GetNewUDPResponse() (*net.UDPAddr, []byte, error) {
 	return e.targetAddr, bs[:n], nil
 }
 
-func (e *UniUDP_Putter) WriteUDPRequest(addr *net.UDPAddr, bs []byte, dialFunc func(targetAddr *Addr) (io.ReadWriter, error)) (err error) {
+func (e *UniUDP_Putter) WriteUDPRequest(addr net.UDPAddr, bs []byte, dialFunc func(targetAddr Addr) (io.ReadWriter, error)) (err error) {
 
 	if addr.String() == e.targetAddr.String() {
 		_, err = e.ReadWriter.Write(bs)
@@ -122,14 +122,14 @@ func (e *UniUDP_Putter) WriteUDPRequest(addr *net.UDPAddr, bs []byte, dialFunc f
 //	收到的响应数据的来源 如果和 targetAddr 相同的话，直接写入传入的 ReadWriter
 //  收到的外界数据的来源 如果和 targetAddr 不同的话，那肯定就是使用了fullcone，那么要传入 unknownRemoteAddrMsgWriter； 如果New时传入unknownRemoteAddrMsgWriter的 是nil的话，那么意思就是不支持fullcone，将直接舍弃这一部分数据。
 type UniUDP_Extractor struct {
-	targetAddr *net.UDPAddr
+	targetAddr net.UDPAddr
 	io.ReadWriter
 
 	unknownRemoteAddrMsgWriter UDPResponseWriter
 }
 
 // 新建，unknownRemoteAddrMsgWriter 用于写入 未知来源响应，rw 用于普通的客户请求的目标的响应
-func NewUniUDP_Extractor(addr *net.UDPAddr, rw io.ReadWriter, unknownRemoteAddrMsgWriter UDPResponseWriter) *UniUDP_Extractor {
+func NewUniUDP_Extractor(addr net.UDPAddr, rw io.ReadWriter, unknownRemoteAddrMsgWriter UDPResponseWriter) *UniUDP_Extractor {
 	return &UniUDP_Extractor{
 		targetAddr:                 addr,
 		ReadWriter:                 rw,
@@ -138,7 +138,7 @@ func NewUniUDP_Extractor(addr *net.UDPAddr, rw io.ReadWriter, unknownRemoteAddrM
 }
 
 // 从客户端连接中 提取出 它的 UDP请求，就是直接读取数据。然后搭配上之前设置好的地址
-func (e *UniUDP_Extractor) GetNewUDPRequest() (*net.UDPAddr, []byte, error) {
+func (e *UniUDP_Extractor) GetNewUDPRequest() (net.UDPAddr, []byte, error) {
 	bs := make([]byte, MaxUDP_packetLen)
 	n, err := e.ReadWriter.Read(bs)
 	if err != nil {
@@ -150,7 +150,7 @@ func (e *UniUDP_Extractor) GetNewUDPRequest() (*net.UDPAddr, []byte, error) {
 // WriteUDPResponse 写入远程服务器的响应；要分情况讨论。
 // 因为是单一目标extractor，所以正常情况下 传入的response 的源地址 也 应和 e.targetAddr 相同，
 //  如果地址不同的话，那肯定就是使用了fullcone，那么要传入 unknownRemoteAddrMsgWriter
-func (e *UniUDP_Extractor) WriteUDPResponse(addr *net.UDPAddr, bs []byte) (err error) {
+func (e *UniUDP_Extractor) WriteUDPResponse(addr net.UDPAddr, bs []byte) (err error) {
 
 	if addr.String() == e.targetAddr.String() {
 		_, err = e.ReadWriter.Write(bs)
@@ -168,7 +168,7 @@ func (e *UniUDP_Extractor) WriteUDPResponse(addr *net.UDPAddr, bs []byte) (err e
 }
 
 type UDPAddrData struct {
-	Addr *net.UDPAddr
+	Addr net.UDPAddr
 	Data []byte
 }
 
@@ -183,20 +183,20 @@ func NewUDP_Pipe() *UDP_Pipe {
 		responseChan: make(chan UDPAddrData, 10),
 	}
 }
-func (u *UDP_Pipe) GetNewUDPRequest() (*net.UDPAddr, []byte, error) {
+func (u *UDP_Pipe) GetNewUDPRequest() (net.UDPAddr, []byte, error) {
 	d := <-u.requestChan
 	return d.Addr, d.Data, nil
 
 }
 
-func (u *UDP_Pipe) GetNewUDPResponse() (*net.UDPAddr, []byte, error) {
+func (u *UDP_Pipe) GetNewUDPResponse() (net.UDPAddr, []byte, error) {
 	d := <-u.responseChan
 	return d.Addr, d.Data, nil
 
 }
 
 // 会保存bs的副本，不必担心数据被改变的问题。
-func (u *UDP_Pipe) WriteUDPResponse(addr *net.UDPAddr, bs []byte) error {
+func (u *UDP_Pipe) WriteUDPResponse(addr net.UDPAddr, bs []byte) error {
 	bsCopy := make([]byte, len(bs))
 	copy(bsCopy, bs)
 
@@ -208,7 +208,7 @@ func (u *UDP_Pipe) WriteUDPResponse(addr *net.UDPAddr, bs []byte) error {
 }
 
 // 会保存bs的副本，不必担心数据被改变的问题。
-func (u *UDP_Pipe) WriteUDPRequest(addr *net.UDPAddr, bs []byte, dialFunc func(targetAddr *Addr) (io.ReadWriter, error)) error {
+func (u *UDP_Pipe) WriteUDPRequest(addr net.UDPAddr, bs []byte, dialFunc func(targetAddr Addr) (io.ReadWriter, error)) error {
 	bsCopy := make([]byte, len(bs))
 	copy(bsCopy, bs)
 
@@ -254,7 +254,7 @@ func RelayUDP_to_Direct(extractor UDP_Extractor) {
 
 		} else {
 
-			newConn, err := net.DialUDP("udp", nil, addr)
+			newConn, err := net.DialUDP("udp", nil, &addr)
 			if err != nil {
 				break
 			}
@@ -269,7 +269,7 @@ func RelayUDP_to_Direct(extractor UDP_Extractor) {
 			mutex.Unlock()
 
 			//监听所有发往 newConn的 远程任意主机 发来的消息。
-			go func(thisconn *net.UDPConn, supposedRemoteAddr *net.UDPAddr) {
+			go func(thisconn *net.UDPConn, supposedRemoteAddr net.UDPAddr) {
 				bs := make([]byte, MaxUDP_packetLen)
 				for {
 					//log.Println("redirect udp, start read", supposedRemoteAddr)
@@ -289,7 +289,7 @@ func RelayUDP_to_Direct(extractor UDP_Extractor) {
 
 					//log.Println("redirect udp, will write to extractor", string(bs[:n]))
 
-					err = extractor.WriteUDPResponse(raddr, bs[:n])
+					err = extractor.WriteUDPResponse(*raddr, bs[:n])
 					if err != nil {
 						break
 					}
diff --git a/proxy/config_simple.go b/proxy/config_simple.go
index ffd424e..4ef3ed2 100644
--- a/proxy/config_simple.go
+++ b/proxy/config_simple.go
@@ -18,27 +18,35 @@ type Simple struct {
 	MyCountryISO_3166         string                    `toml:"mycountry" json:"mycountry"`
 }
 
-func LoadSimpleConfigFile(fileNamePath string) (*Simple, error) {
+func LoadSimpleConfigFile(fileNamePath string) (config Simple, hasError bool, E utils.ErrInErr) {
 
 	if cf, err := os.Open(fileNamePath); err == nil {
 		defer cf.Close()
 		bs, _ := ioutil.ReadAll(cf)
-		config := &Simple{}
-		if err = json.Unmarshal(bs, config); err != nil {
-			return nil, utils.NewDataErr("can not parse config file ", err, fileNamePath)
+		if err = json.Unmarshal(bs, &config); err != nil {
+			hasError = true
+			E = utils.ErrInErr{
+				ErrDesc:   "can not parse config file ",
+				ErrDetail: err,
+				Data:      fileNamePath,
+			}
+
 		}
 
-		return config, nil
+		return
 	} else {
-		return nil, utils.NewErr("can't open config file", err)
+		hasError = true
+		E = utils.ErrInErr{ErrDesc: "can't open config file", ErrDetail: err}
+		return
 	}
 
 }
 
-func LoadSimpleConfigFromStr(str string) (*Simple, error) {
-	config := &Simple{}
-	if err := json.Unmarshal([]byte(str), config); err != nil {
-		return nil, utils.NewErr("can not parse config ", err)
+func LoadSimpleConfigFromStr(str string) (config Simple, hasE bool, E utils.ErrInErr) {
+
+	if err := json.Unmarshal([]byte(str), &config); err != nil {
+		E = utils.ErrInErr{ErrDesc: "can not parse config ", ErrDetail: err}
+		hasE = true
 	}
-	return config, nil
+	return
 }
diff --git a/proxy/config_standard.go b/proxy/config_standard.go
index 2c65249..f2412a4 100644
--- a/proxy/config_standard.go
+++ b/proxy/config_standard.go
@@ -130,21 +130,20 @@ type Standard struct {
 	App *AppConf `toml:"app"`
 }
 
-func LoadTomlConfStr(str string) (c *Standard, err error) {
-	c = &Standard{}
-	_, err = toml.Decode(str, c)
+func LoadTomlConfStr(str string) (c Standard, err error) {
+	_, err = toml.Decode(str, &c)
 
 	return
 }
 
-func LoadTomlConfFile(fileNamePath string) (*Standard, error) {
+func LoadTomlConfFile(fileNamePath string) (Standard, error) {
 
 	if cf, err := os.Open(fileNamePath); err == nil {
 		defer cf.Close()
 		bs, _ := ioutil.ReadAll(cf)
 		return LoadTomlConfStr(string(bs))
 	} else {
-		return nil, utils.NewErr("can't open config file", err)
+		return Standard{}, utils.ErrInErr{ErrDesc: "can't open config file", ErrDetail: err}
 	}
 
 }
diff --git a/proxy/config_test.go b/proxy/config_test.go
index 33b4c25..bf86a41 100644
--- a/proxy/config_test.go
+++ b/proxy/config_test.go
@@ -21,8 +21,8 @@ func TestClientSimpleConfig(t *testing.T) {
   ]
 }`
 
-	mc, err := proxy.LoadSimpleConfigFromStr(confstr1)
-	if err != nil {
+	mc, hasE, err := proxy.LoadSimpleConfigFromStr(confstr1)
+	if hasE {
 		t.Log("loadConfigFromStr err", err)
 		t.FailNow()
 	}
diff --git a/proxy/creator.go b/proxy/creator.go
index 057790a..e7a3741 100644
--- a/proxy/creator.go
+++ b/proxy/creator.go
@@ -68,17 +68,17 @@ func NewClient(dc *DialConf) (Client, error) {
 
 		}
 	}
-	return nil, utils.NewDataErr("unknown client protocol '", nil, protocol)
+	return nil, utils.ErrInErr{ErrDesc: "unknown client protocol ", Data: protocol}
 
 }
 
 // ClientFromURL calls the registered creator to create client.
 // dialer is the default upstream dialer so cannot be nil, we can use Default when calling this function.
-func ClientFromURL(s string) (Client, error) {
+func ClientFromURL(s string) (Client, bool, utils.ErrInErr) {
 	u, err := url.Parse(s)
 	if err != nil {
 
-		return nil, utils.NewDataErr("can not parse client url", err, s)
+		return nil, true, utils.ErrInErr{ErrDesc: "can not parse client url", ErrDetail: err, Data: s}
 	}
 
 	schemeName := strings.ToLower(u.Scheme)
@@ -87,10 +87,10 @@ func ClientFromURL(s string) (Client, error) {
 	if ok {
 		c, e := creator.NewClientFromURL(u)
 		if e != nil {
-			return nil, e
+			return nil, true, utils.ErrInErr{ErrDesc: "creator.NewClientFromURL err", ErrDetail: e}
 		}
 		configCommonByURL(c, u)
-		return c, nil
+		return c, false, utils.ErrInErr{}
 	} else {
 
 		//尝试判断是否套tls, 比如vlesss实际上是vless+tls，https实际上是http+tls
@@ -100,20 +100,20 @@ func ClientFromURL(s string) (Client, error) {
 		if ok {
 			c, err := creator.NewClientFromURL(u)
 			if err != nil {
-				return c, err
+				return nil, true, utils.ErrInErr{ErrDesc: "creator.NewClientFromURL err", ErrDetail: err}
 			}
 			configCommonByURL(c, u)
 
 			c.SetUseTLS()
 			prepareTLS_forProxyCommon_withURL(u, true, c)
 
-			return c, err
+			return c, false, utils.ErrInErr{}
 
 		}
 
 	}
 
-	return nil, utils.NewDataErr("unknown client protocol '", nil, u.Scheme)
+	return nil, false, utils.ErrInErr{ErrDesc: "unknown client protocol ", Data: u.Scheme}
 }
 
 func NewServer(lc *ListenConf) (Server, error) {
@@ -130,7 +130,7 @@ func NewServer(lc *ListenConf) (Server, error) {
 			ser.SetUseTLS()
 			err = prepareTLS_forServer(ser, lc)
 			if err != nil {
-				log.Fatalln("prepareTLS error", err)
+				log.Fatalf("prepareTLS error %s\n", err)
 			}
 			return ser, nil
 		}
@@ -149,24 +149,28 @@ func NewServer(lc *ListenConf) (Server, error) {
 			ser.SetUseTLS()
 			err = prepareTLS_forServer(ser, lc)
 			if err != nil {
-				log.Fatalln("prepareTLS error", err)
+				log.Fatalf("prepareTLS error %s\n", err)
 			}
 			return ser, nil
 
 		}
 	}
 
-	return nil, utils.NewDataErr("unknown server protocol '", nil, protocol)
+	return nil, utils.ErrInErr{ErrDesc: "unknown server protocol ", Data: protocol}
 }
 
 // ServerFromURL calls the registered creator to create proxy servers
 // dialer is the default upstream dialer so cannot be nil, we can use Default when calling this function
 // 所有的server都可有 "norule"参数，标明无需路由或者此server不可使用路由，在监听多个ip时是有用的;
 // 路由配置可以在json的其他配置里面设置，如 mycountry项
-func ServerFromURL(s string) (Server, error) {
+func ServerFromURL(s string) (Server, bool, utils.ErrInErr) {
 	u, err := url.Parse(s)
 	if err != nil {
-		return nil, utils.NewDataErr("can not parse server url ", err, s)
+		return nil, true, utils.ErrInErr{
+			ErrDesc:   "can not parse server url ",
+			ErrDetail: err,
+			Data:      s,
+		}
 	}
 
 	schemeName := strings.ToLower(u.Scheme)
@@ -174,29 +178,35 @@ func ServerFromURL(s string) (Server, error) {
 	if ok {
 		ser, err := creator.NewServerFromURL(u)
 		if err != nil {
-			return nil, err
+			return nil, true, utils.ErrInErr{
+				ErrDesc:   "creator.NewServerFromURL err ",
+				ErrDetail: err,
+			}
 		}
 		configCommonURLQueryForServer(ser, u)
 
-		return ser, nil
+		return ser, false, utils.ErrInErr{}
 	} else {
 		realScheme := strings.TrimSuffix(schemeName, "s")
 		creator, ok = serverCreatorMap[realScheme]
 		if ok {
 			server, err := creator.NewServerFromURL(u)
 			if err != nil {
-				return nil, err
+				return nil, true, utils.ErrInErr{
+					ErrDesc:   "creator.NewServerFromURL err ",
+					ErrDetail: err,
+				}
 			}
 			configCommonURLQueryForServer(server, u)
 
 			server.SetUseTLS()
 			prepareTLS_forProxyCommon_withURL(u, false, server)
-			return server, nil
+			return server, false, utils.ErrInErr{}
 
 		}
 	}
 
-	return nil, utils.NewDataErr("unknown server protocol '", nil, u.Scheme)
+	return nil, true, utils.ErrInErr{ErrDesc: "unknown server protocol ", Data: u.Scheme}
 }
 
 //setTag, setCantRoute, call configCommonByURL
@@ -218,7 +228,7 @@ func configCommonURLQueryForServer(ser ProxyCommon, u *url.URL) {
 		fa, err := netLayer.NewAddr(fallbackStr)
 
 		if err != nil {
-			log.Fatalln("invalid fallback ", fallbackStr)
+			log.Fatalf("invalid fallback %s\n", fallbackStr)
 		}
 
 		ser.setFallback(fa)
diff --git a/proxy/dokodemo/server.go b/proxy/dokodemo/server.go
index e7b77b6..cbf6582 100644
--- a/proxy/dokodemo/server.go
+++ b/proxy/dokodemo/server.go
@@ -73,7 +73,7 @@ func (_ ServerCreator) NewServer(lc *proxy.ListenConf) (proxy.Server, error) {
 type Server struct {
 	proxy.ProxyCommonStruct
 
-	targetAddr *netLayer.Addr
+	targetAddr netLayer.Addr
 }
 
 func NewServer() (proxy.Server, error) {
@@ -82,6 +82,6 @@ func NewServer() (proxy.Server, error) {
 }
 func (d *Server) Name() string { return name }
 
-func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Addr, error) {
+func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, netLayer.Addr, error) {
 	return underlay, s.targetAddr, nil
 }
diff --git a/proxy/http/server.go b/proxy/http/server.go
index 1dc5ce8..60ab8dc 100644
--- a/proxy/http/server.go
+++ b/proxy/http/server.go
@@ -48,7 +48,7 @@ func (_ Server) Name() string {
 	return name
 }
 
-func (s *Server) Handshake(underlay net.Conn) (newconn io.ReadWriteCloser, targetAddr *netLayer.Addr, err error) {
+func (s *Server) Handshake(underlay net.Conn) (newconn io.ReadWriteCloser, targetAddr netLayer.Addr, err error) {
 	var b = utils.GetMTU() //一般要获取请求信息，不需要那么长; 就算是http，加了path，也不用太长
 	//因为要储存为 firstdata，所以也无法直接放回
 
@@ -67,7 +67,7 @@ func (s *Server) Handshake(underlay net.Conn) (newconn io.ReadWriteCloser, targe
 
 	method, path, failreason := httpLayer.GetRequestMethod_and_PATH_from_Bytes(b[:n], true)
 	if failreason != 0 {
-		err = utils.NewDataErr("get method/path failed, method:"+method+" ,reason:", nil, failreason)
+		err = utils.ErrInErr{ErrDesc: "get method/path failed, method:" + method + " ,reason:", Data: failreason}
 
 		//一个正常的http代理如果遇到了 格式不符的情况的话是要返回 400 等错误代码的
 		// 但是，也不能说不返回400的就是异常服务器，因为这可能是服务器自己的策略，无视一切错误请求，比如防黑客时就常常会如此.
diff --git a/proxy/proxy.go b/proxy/proxy.go
index 32d6c23..20cc4c1 100644
--- a/proxy/proxy.go
+++ b/proxy/proxy.go
@@ -17,17 +17,19 @@ import (
 )
 
 func PrintAllServerNames() {
-	fmt.Println("===============================\nSupported Server protocols:")
+	fmt.Printf("===============================\nSupported Server protocols:\n")
 	for v := range serverCreatorMap {
-		fmt.Println(v)
+		fmt.Print(v)
+		fmt.Print("\n")
 	}
 }
 
 func PrintAllClientNames() {
-	fmt.Println("===============================\nSupported client protocols:")
+	fmt.Printf("===============================\nSupported client protocols:\n")
 
 	for v := range clientCreatorMap {
-		fmt.Println(v)
+		fmt.Print(v)
+		fmt.Print("\n")
 	}
 }
 
@@ -50,7 +52,7 @@ type Client interface {
 type Server interface {
 	ProxyCommon
 
-	Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Addr, error)
+	Handshake(underlay net.Conn) (io.ReadWriteCloser, netLayer.Addr, error)
 }
 
 // FullName 可以完整表示 一个 代理的 VSI 层级.
@@ -116,8 +118,8 @@ type ProxyCommon interface {
 
 	/////////////////// http层 ///////////////////
 	//默认回落地址.
-	GetFallback() *netLayer.Addr
-	setFallback(*netLayer.Addr)
+	GetFallback() netLayer.Addr
+	setFallback(netLayer.Addr)
 
 	CanFallback() bool //如果能fallback，则handshake失败后，可能会专门返回 FallbackErr,如监测到返回了 FallbackErr, 则main函数会进行 回落处理.
 
@@ -196,7 +198,7 @@ func prepareTLS_forClient(com ProxyCommon, dc *DialConf) error {
 			if e != nil {
 				log.Fatalln("prepareTLS_forClient,quic,netLayer.NewAddr err: ", e)
 			}
-			return quic.DialCommonInitialLayer(na, &tls.Config{
+			return quic.DialCommonInitialLayer(&na, tls.Config{
 				InsecureSkipVerify: dc.Insecure,
 				ServerName:         dc.Host,
 				NextProtos:         alpnList,
@@ -275,10 +277,10 @@ func prepareTLS_forServer(com ProxyCommon, lc *ListenConf) error {
 			certArray, err := tlsLayer.GetCertArrayFromFile(lc.TLSCert, lc.TLSKey)
 
 			if err != nil {
-				log.Fatalln("can't create tls cert from file:", lc.TLSCert, lc.TLSKey, err)
+				log.Fatalf("can't create tls cert from file: %s, %s, %s\n", lc.TLSCert, lc.TLSKey, err)
 			}
 
-			return quic.ListenInitialLayers(com.AddrStr(), &tls.Config{
+			return quic.ListenInitialLayers(com.AddrStr(), tls.Config{
 				InsecureSkipVerify: lc.Insecure,
 				ServerName:         lc.Host,
 				Certificates:       certArray,
@@ -368,7 +370,7 @@ type ProxyCommonStruct struct {
 	ws_s *ws.Server
 
 	grpc_s       *grpc.Server
-	FallbackAddr *netLayer.Addr
+	FallbackAddr netLayer.Addr
 
 	listenCommonConnFunc func() (newConnChan chan net.Conn, baseConn any)
 	dialCommonConnFunc   func(serverAddr *netLayer.Addr) any
@@ -386,10 +388,10 @@ func (pcs *ProxyCommonStruct) setPath(a string) {
 	pcs.PATH = a
 }
 
-func (pcs *ProxyCommonStruct) GetFallback() *netLayer.Addr {
+func (pcs *ProxyCommonStruct) GetFallback() netLayer.Addr {
 	return pcs.FallbackAddr
 }
-func (pcs *ProxyCommonStruct) setFallback(a *netLayer.Addr) {
+func (pcs *ProxyCommonStruct) setFallback(a netLayer.Addr) {
 	pcs.FallbackAddr = a
 }
 
diff --git a/proxy/socks5/client.go b/proxy/socks5/client.go
index df5f881..9565852 100644
--- a/proxy/socks5/client.go
+++ b/proxy/socks5/client.go
@@ -137,7 +137,7 @@ func Client_ReadUDPResponse(udpConn *net.UDPConn, supposedServerAddr *net.UDPAdd
 	}
 
 	if !(addr.IP.Equal(supposedServerAddr.IP) && addr.Port == supposedServerAddr.Port) {
-		e = utils.NewDataErr("socks5 Client_ReadUDPResponse , got data from unknown source", nil, addr)
+		e = utils.ErrInErr{ErrDesc: "socks5 Client_ReadUDPResponse , got data from unknown source", Data: addr}
 		return
 	}
 	if buf[0] != 0 || buf[1] != 0 || buf[2] != 0 {
diff --git a/proxy/socks5/server.go b/proxy/socks5/server.go
index 3258d70..5798bd7 100644
--- a/proxy/socks5/server.go
+++ b/proxy/socks5/server.go
@@ -47,10 +47,11 @@ func (s *Server) Name() string { return Name }
 // 参考 https://studygolang.com/articles/31404
 
 // 处理tcp收到的请求. 注意, udp associate后的 udp请求并不通过此函数处理, 而是由 UDPConn.StartReadRequest 处理
-func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Addr, error) {
+func (s *Server) Handshake(underlay net.Conn) (result io.ReadWriteCloser, targetAddr netLayer.Addr, returnErr error) {
 	// Set handshake timeout 4 seconds
 	if err := underlay.SetReadDeadline(time.Now().Add(time.Second * 4)); err != nil {
-		return nil, nil, err
+		returnErr = err
+		return
 	}
 	defer underlay.SetReadDeadline(time.Time{})
 
@@ -61,24 +62,28 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 	// 一般握手包发来的是 [5 1 0]
 	n, err := underlay.Read(buf)
 	if err != nil || n == 0 {
-		return nil, nil, fmt.Errorf("failed to read hello: %w", err)
+		returnErr = fmt.Errorf("failed to read hello: %w", err)
+		return
 	}
 	version := buf[0]
 	if version != Version5 {
-		return nil, nil, fmt.Errorf("unsupported socks version %v", version)
+		returnErr = fmt.Errorf("unsupported socks version %v", version)
+		return
 	}
 
 	// Write hello response， [5 0]
 	// TODO: Support Auth
 	_, err = underlay.Write([]byte{Version5, AuthNone})
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to write hello response: %w", err)
+		returnErr = fmt.Errorf("failed to write hello response: %w", err)
+		return
 	}
 
 	// Read command message，
 	n, err = underlay.Read(buf)
 	if err != nil || n < 7 { // Shortest length is 7
-		return nil, nil, fmt.Errorf("read socks5 failed, msgTooShort: %w", err)
+		returnErr = fmt.Errorf("read socks5 failed, msgTooShort: %w", err)
+		return
 	}
 
 	// 一般可以为 5 1 0 3 n，3表示域名，n是域名长度，然后域名很可能是 119 119 119 46 开头，表示 www.
@@ -86,7 +91,8 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 
 	cmd := buf[1]
 	if cmd == CmdBind {
-		return nil, nil, fmt.Errorf("unsuppoted command %v", cmd)
+		returnErr = fmt.Errorf("unsuppoted command %v", cmd)
+		return
 	}
 
 	l := 2
@@ -104,11 +110,13 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 		l += int(buf[4])
 		off = 5
 	default:
-		return nil, nil, fmt.Errorf("unknown address type %v", buf[3])
+		returnErr = fmt.Errorf("unknown address type %v", buf[3])
+		return
 	}
 
 	if len(buf[off:]) < l {
-		return nil, nil, errors.New("short command request")
+		returnErr = errors.New("short command request")
+		return
 	}
 
 	var theName string
@@ -145,7 +153,8 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 
 		udpRC, err := net.ListenUDP("udp", udpPreparedAddr)
 		if err != nil {
-			return nil, nil, errors.New("UDPAssociate: unable to listen udp")
+			returnErr = errors.New("UDPAssociate: unable to listen udp")
+			return
 		}
 
 		//ver（5）, rep（0，表示成功）, rsv（0）, atyp(1, 即ipv4), BND.ADDR(4字节的ipv4) , BND.PORT(2字节)
@@ -154,10 +163,11 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 		// Write command response
 		_, err = underlay.Write(reply)
 		if err != nil {
-			return nil, nil, fmt.Errorf("failed to write command response: %w", err)
+			returnErr = fmt.Errorf("failed to write command response: %w", err)
+			return
 		}
 
-		clientFutureAddr := &netLayer.Addr{
+		clientFutureAddr := netLayer.Addr{
 			IP:      theIP,
 			Name:    theName,
 			Port:    thePort,
@@ -172,7 +182,7 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 		return uc, clientFutureAddr, nil
 
 	} else {
-		addr := &netLayer.Addr{
+		targetAddr = netLayer.Addr{
 			IP:   theIP,
 			Name: theName,
 			Port: thePort,
@@ -186,10 +196,11 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 
 		_, err = underlay.Write(reply)
 		if err != nil {
-			return nil, nil, fmt.Errorf("failed to write command response: %w", err)
+			returnErr = fmt.Errorf("failed to write command response: %w", err)
+			return
 		}
 
-		return underlay, addr, nil
+		return underlay, targetAddr, nil
 	}
 
 }
@@ -244,7 +255,7 @@ func (u *UDPConn) StartPushResponse(udpPutter netLayer.UDP_Putter) {
 // 然后将该请求 用 udpPutter.WriteUDPRequest 发送给 udpPutter
 //	至于fullcone与否它是不管的。
 // 如果客户端一开始没有指明自己连接本服务端的ip和端口, 则将第一个发来的正确的socks5请求视为该客户端,并记录。
-func (u *UDPConn) StartReadRequest(udpPutter netLayer.UDP_Putter, dialFunc func(targetAddr *netLayer.Addr) (io.ReadWriter, error)) {
+func (u *UDPConn) StartReadRequest(udpPutter netLayer.UDP_Putter, dialFunc func(targetAddr netLayer.Addr) (io.ReadWriter, error)) {
 
 	var clientSupposedAddrIsNothing bool
 	if len(u.clientSupposedAddr.IP) < 3 || u.clientSupposedAddr.IP.IsUnspecified() {
@@ -341,7 +352,7 @@ func (u *UDPConn) StartReadRequest(udpPutter netLayer.UDP_Putter, dialFunc func(
 
 		//log.Println("socks5 server,StartReadRequest, got msg", thisaddr, string(bs[newStart:n]))
 
-		udpPutter.WriteUDPRequest(requestAddr.ToUDPAddr(), bs[newStart:n], dialFunc)
+		udpPutter.WriteUDPRequest(*requestAddr.ToUDPAddr(), bs[newStart:n], dialFunc)
 
 	}
 }
diff --git a/proxy/socks5/udp_test.go b/proxy/socks5/udp_test.go
index 3678150..a23c24d 100644
--- a/proxy/socks5/udp_test.go
+++ b/proxy/socks5/udp_test.go
@@ -54,7 +54,7 @@ func TestUDP(t *testing.T) {
 
 				go udpConn.StartPushResponse(putter)
 
-				dialFunc := func(targetAddr *netLayer.Addr) (io.ReadWriter, error) {
+				dialFunc := func(targetAddr netLayer.Addr) (io.ReadWriter, error) {
 					return targetAddr.Dial()
 				}
 
@@ -142,7 +142,7 @@ func TestUDP(t *testing.T) {
 
 	t.Log("call Client_RequestUDP")
 
-	socks5.Client_RequestUDP(urc, raFake, []byte("hello"))
+	socks5.Client_RequestUDP(urc, &raFake, []byte("hello"))
 
 	t.Log("call Client_ReadUDPResponse")
 
diff --git a/proxy/vless/client.go b/proxy/vless/client.go
index 044ce49..eec525e 100644
--- a/proxy/vless/client.go
+++ b/proxy/vless/client.go
@@ -3,7 +3,6 @@ package vless
 import (
 	"bufio"
 	"bytes"
-	"encoding/binary"
 	"io"
 	"log"
 	"net"
@@ -17,14 +16,14 @@ import (
 )
 
 func init() {
-	proxy.RegisterClient(Name, &ClientCreator{})
+	proxy.RegisterClient(Name, ClientCreator{})
 }
 
 //实现 proxy.UserClient，以及 netLayer.UDP_Putter
 type Client struct {
 	proxy.ProxyCommonStruct
 
-	udpResponseChan chan *netLayer.UDPAddrData
+	udpResponseChan chan netLayer.UDPAddrData
 
 	version int
 
@@ -52,12 +51,12 @@ func (_ ClientCreator) NewClient(dc *proxy.DialConf) (proxy.Client, error) {
 		return nil, err
 	}
 
-	c := &Client{
+	c := Client{
 		user: id,
 	}
 
 	c.knownUDPDestinations = make(map[string]io.ReadWriter)
-	c.udpResponseChan = make(chan *netLayer.UDPAddrData, 20)
+	c.udpResponseChan = make(chan netLayer.UDPAddrData, 20)
 
 	v := dc.Version
 	if v >= 0 {
@@ -68,7 +67,7 @@ func (_ ClientCreator) NewClient(dc *proxy.DialConf) (proxy.Client, error) {
 
 	}
 
-	return c, nil
+	return &c, nil
 }
 
 func NewClientByURL(url *url.URL) (proxy.Client, error) {
@@ -78,11 +77,11 @@ func NewClientByURL(url *url.URL) (proxy.Client, error) {
 		return nil, err
 	}
 
-	c := &Client{
+	c := Client{
 		user: id,
 	}
 	c.knownUDPDestinations = make(map[string]io.ReadWriter)
-	c.udpResponseChan = make(chan *netLayer.UDPAddrData, 20)
+	c.udpResponseChan = make(chan netLayer.UDPAddrData, 20)
 
 	vStr := url.Query().Get("version")
 	if vStr != "" {
@@ -94,7 +93,7 @@ func NewClientByURL(url *url.URL) (proxy.Client, error) {
 		}
 	}
 
-	return c, nil
+	return &c, nil
 }
 
 func (c *Client) Name() string { return Name }
@@ -158,10 +157,10 @@ func (c *Client) Handshake(underlay net.Conn, target *netLayer.Addr) (io.ReadWri
 	}
 
 	buf := c.getBufWithCmd(cmd)
-	err = binary.Write(buf, binary.BigEndian, uint16(port)) // port
-	if err != nil {
-		return nil, err
-	}
+
+	buf.WriteByte(byte(uint16(port) >> 8))
+	buf.WriteByte(byte(uint16(port) << 8 >> 8))
+
 	buf.WriteByte(atyp)
 	buf.Write(addr)
 
@@ -178,13 +177,13 @@ func (c *Client) Handshake(underlay net.Conn, target *netLayer.Addr) (io.ReadWri
 	}, err
 }
 
-func (c *Client) GetNewUDPResponse() (*net.UDPAddr, []byte, error) {
+func (c *Client) GetNewUDPResponse() (net.UDPAddr, []byte, error) {
 	x := <-c.udpResponseChan //v1的话，由 handle_CRUMFURS 以及 WriteUDPRequest 中的 goroutine 填充；v0的话，由 WriteUDPRequest 填充
 	return x.Addr, x.Data, nil
 }
 
 //一般由socks5或者透明代理等地方 获取到 udp请求后，被传入这里
-func (c *Client) WriteUDPRequest(a *net.UDPAddr, b []byte, dialFunc func(targetAddr *netLayer.Addr) (io.ReadWriter, error)) (err error) {
+func (c *Client) WriteUDPRequest(a net.UDPAddr, b []byte, dialFunc func(targetAddr netLayer.Addr) (io.ReadWriter, error)) (err error) {
 
 	astr := a.String()
 
@@ -194,9 +193,9 @@ func (c *Client) WriteUDPRequest(a *net.UDPAddr, b []byte, dialFunc func(targetA
 
 	if knownConn == nil {
 
-		knownConn, err = dialFunc(netLayer.NewAddrFromUDPAddr(a))
+		knownConn, err = dialFunc(netLayer.NewAddrFromUDPAddr(&a))
 		if err != nil || knownConn == nil {
-			return utils.NewErr("vless WriteUDPRequest, err when creating an underlay", err)
+			return utils.ErrInErr{ErrDesc: "vless WriteUDPRequest, err when creating an underlay", ErrDetail: err}
 		}
 		//这里原来的代码是调用 c.Handshake，会自动帮我们拨号代理节点CmdUDP
 		// 但是似乎有问题，因为不应该由client自己拨号vless，因为我们还有上层的tls;
@@ -221,7 +220,7 @@ func (c *Client) WriteUDPRequest(a *net.UDPAddr, b []byte, dialFunc func(targetA
 				msg := make([]byte, n)
 				copy(msg, bs[:n])
 
-				c.udpResponseChan <- &netLayer.UDPAddrData{
+				c.udpResponseChan <- netLayer.UDPAddrData{
 					Addr: a,
 					Data: msg,
 				}
@@ -283,8 +282,8 @@ func (c *Client) handle_CRUMFURS(UMFURS_conn net.Conn) {
 
 			port := int16(msg[portIndex])<<8 + int16(msg[portIndex+1])
 
-			c.udpResponseChan <- &netLayer.UDPAddrData{
-				Addr: &net.UDPAddr{
+			c.udpResponseChan <- netLayer.UDPAddrData{
+				Addr: net.UDPAddr{
 					IP:   theIP,
 					Port: int(port),
 				},
@@ -339,8 +338,8 @@ func (c *Client) handle_CRUMFURS(UMFURS_conn net.Conn) {
 				break
 			}
 
-			c.udpResponseChan <- &netLayer.UDPAddrData{
-				Addr: &net.UDPAddr{
+			c.udpResponseChan <- netLayer.UDPAddrData{
+				Addr: net.UDPAddr{
 					IP:   theIP,
 					Port: port,
 				},
diff --git a/proxy/vless/server.go b/proxy/vless/server.go
index 33911b4..5b27bb1 100644
--- a/proxy/vless/server.go
+++ b/proxy/vless/server.go
@@ -133,10 +133,11 @@ func (s *Server) GetUserByStr(str string) proxy.User {
 func (s *Server) Name() string { return Name }
 
 // 返回的bytes.Buffer 是用于 回落使用的，内含了整个读取的数据;不回落时不要使用该Buffer
-func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Addr, error) {
+func (s *Server) Handshake(underlay net.Conn) (result io.ReadWriteCloser, targetAddr netLayer.Addr, returnErr error) {
 
 	if err := underlay.SetReadDeadline(time.Now().Add(time.Second * 4)); err != nil {
-		return nil, nil, err
+		returnErr = err
+		return
 	}
 	defer underlay.SetReadDeadline(time.Time{})
 
@@ -149,30 +150,30 @@ func (s *Server) Handshake(underlay net.Conn) (io.ReadWriteCloser, *netLayer.Add
 	//var auth [17]byte
 	wholeReadLen, err := underlay.Read(readbs)
 	if err != nil {
-		return nil, nil, utils.NewDataErr("read err", err, wholeReadLen)
+		returnErr = utils.ErrInErr{ErrDesc: "read err", ErrDetail: err, Data: wholeReadLen}
+		return
 	}
 
 	if wholeReadLen < 17 {
 		//根据下面回答，HTTP的最小长度恰好是16字节，但是是0.9版本。1.0是18字节，1.1还要更长。总之我们可以直接不返回fallback地址
 		//https://stackoverflow.com/questions/25047905/http-request-minimum-size-in-bytes/25065089
 
-		return nil, nil, utils.NewDataErr("fallback, msg too short", nil, wholeReadLen)
-
+		returnErr = utils.ErrInErr{ErrDesc: "fallback, msg too short", Data: wholeReadLen}
+		return
 	}
 
 	readbuf := bytes.NewBuffer(readbs[:wholeReadLen])
 
-	var returnErr error
-
 	goto realPart
 
 errorPart:
 
 	//所返回的buffer必须包含所有数据，而Buffer不支持回退，所以只能重新New
-	return nil, nil, &utils.ErrFirstBuffer{
+	returnErr = &utils.ErrFirstBuffer{
 		Err:   returnErr,
 		First: bytes.NewBuffer(readbs[:wholeReadLen]),
 	}
+	return
 
 realPart:
 	//这部分过程可以参照 v2ray的 proxy/vless/encoding/encoding.go DecodeRequestHeader 方法
@@ -183,7 +184,7 @@ realPart:
 	version := auth[0]
 	if version > 1 {
 
-		returnErr = utils.NewDataErr("Vless invalid version ", nil, version)
+		returnErr = utils.ErrInErr{ErrDesc: "Vless invalid version ", Data: version}
 		goto errorPart
 
 	}
@@ -206,7 +207,8 @@ realPart:
 
 		addonLenByte, err := readbuf.ReadByte()
 		if err != nil {
-			return nil, nil, err //凡是和的层Read相关的错误，一律不再返回Fallback信息，因为连接已然不可用
+			returnErr = err //凡是和的层Read相关的错误，一律不再返回Fallback信息，因为连接已然不可用
+			return
 		}
 		if addonLenByte != 0 {
 			//v2ray的vless中没有对应的任何处理。
@@ -223,7 +225,8 @@ realPart:
 				utils.PutBytes(tmpBuf)
 			*/
 			if tmpbs := readbuf.Next(int(addonLenByte)); len(tmpbs) != int(addonLenByte) {
-				return nil, nil, errors.New("vless short read in addon")
+				returnErr = errors.New("vless short read in addon")
+				return
 			}
 		}
 	}
@@ -236,13 +239,11 @@ realPart:
 		goto errorPart
 	}
 
-	addr := &netLayer.Addr{}
-
 	switch commandByte {
 	case CmdMux: //实际目前verysimple 暂时还未实现mux，先这么写
 
-		addr.Port = 0
-		addr.Name = "v1.mux.cool"
+		targetAddr.Port = 0
+		targetAddr.Name = "v1.mux.cool"
 
 	case Cmd_CRUMFURS:
 		if version != 1 {
@@ -255,11 +256,11 @@ realPart:
 		_, err = underlay.Write([]byte{CRUMFURS_ESTABLISHED})
 		if err != nil {
 
-			returnErr = utils.NewErr("write to crumfurs err", err)
+			returnErr = utils.ErrInErr{ErrDesc: "write to crumfurs err", ErrDetail: err}
 			goto errorPart
 		}
 
-		addr.Name = CRUMFURS_Established_Str // 使用这个特殊的办法来告诉调用者，预留了 CRUMFURS 信道，防止其关闭上层连接导致 CRUMFURS 信道 被关闭。
+		targetAddr.Name = CRUMFURS_Established_Str // 使用这个特殊的办法来告诉调用者，预留了 CRUMFURS 信道，防止其关闭上层连接导致 CRUMFURS 信道 被关闭。
 
 		theCRUMFURS := &CRUMFURS{
 			Conn: underlay,
@@ -271,7 +272,7 @@ realPart:
 
 		s.mux4Hashes.Unlock()
 
-		return nil, addr, nil
+		return
 
 	case CmdTCP, CmdUDP:
 
@@ -283,10 +284,10 @@ realPart:
 			goto errorPart
 		}
 
-		addr.Port = int(binary.BigEndian.Uint16(portbs))
+		targetAddr.Port = int(binary.BigEndian.Uint16(portbs))
 
 		if commandByte == CmdUDP {
-			addr.Network = "udp"
+			targetAddr.Network = "udp"
 		}
 
 		var ip_or_domain_bytesLength byte = 0
@@ -303,7 +304,7 @@ realPart:
 		case netLayer.AtypIP4:
 
 			ip_or_domain_bytesLength = net.IPv4len
-			addr.IP = utils.GetBytes(net.IPv4len)
+			targetAddr.IP = utils.GetBytes(net.IPv4len)
 
 		case netLayer.AtypDomain:
 			// 解码域名的长度
@@ -320,7 +321,7 @@ realPart:
 		case netLayer.AtypIP6:
 
 			ip_or_domain_bytesLength = net.IPv6len
-			addr.IP = utils.GetBytes(net.IPv6len)
+			targetAddr.IP = utils.GetBytes(net.IPv6len)
 		default:
 
 			returnErr = fmt.Errorf("unknown address type %v", addrTypeByte)
@@ -332,13 +333,14 @@ realPart:
 		_, err = readbuf.Read(ip_or_domain)
 
 		if err != nil {
-			return nil, nil, errors.New("fallback, reason 6")
+			returnErr = errors.New("fallback, reason 6")
+			return
 		}
 
-		if addr.IP != nil {
-			copy(addr.IP, ip_or_domain)
+		if targetAddr.IP != nil {
+			copy(targetAddr.IP, ip_or_domain)
 		} else {
-			addr.Name = string(ip_or_domain)
+			targetAddr.Name = string(ip_or_domain)
 		}
 
 		utils.PutBytes(ip_or_domain)
@@ -355,10 +357,10 @@ realPart:
 		remainFirstBufLen: readbuf.Len(),
 		uuid:              thisUUIDBytes,
 		version:           int(version),
-		isUDP:             addr.IsUDP(),
+		isUDP:             targetAddr.IsUDP(),
 		underlayIsBasic:   netLayer.IsBasicConn(underlay),
 		isServerEnd:       true,
-	}, addr, nil
+	}, targetAddr, nil
 
 }
 
@@ -375,7 +377,7 @@ type CRUMFURS struct {
 	hasAdvancedLayer bool //在用ws或grpc时，这个开关保持打开
 }
 
-func (c *CRUMFURS) WriteUDPResponse(a *net.UDPAddr, b []byte) (err error) {
+func (c *CRUMFURS) WriteUDPResponse(a net.UDPAddr, b []byte) (err error) {
 	atype := netLayer.AtypIP4
 	if len(a.IP) > 4 {
 		atype = netLayer.AtypIP6
diff --git a/proxy/vless/vless_test.go b/proxy/vless/vless_test.go
index 6dfae6e..3379ac9 100644
--- a/proxy/vless/vless_test.go
+++ b/proxy/vless/vless_test.go
@@ -24,13 +24,13 @@ func TestVLess1(t *testing.T) {
 
 func testVLess(version int, port string, t *testing.T) {
 	url := "vless://a684455c-b14f-11ea-bf0d-42010aaa0003@127.0.0.1:" + port + "?version=" + strconv.Itoa(version)
-	server, err := proxy.ServerFromURL(url)
-	if err != nil {
+	server, hase, _ := proxy.ServerFromURL(url)
+	if hase {
 		t.FailNow()
 	}
 	defer server.Stop()
-	client, err := proxy.ClientFromURL(url)
-	if err != nil {
+	client, hase, _ := proxy.ClientFromURL(url)
+	if hase {
 		t.FailNow()
 	}
 
@@ -127,15 +127,15 @@ func TestVLess0_udp(t *testing.T) {
 //  不过实测，这个test暂时只能使用v0版本，因为 v1版本具有 独特信道，不能直接使用下面代码。
 func testVLessUDP(version int, port string, t *testing.T) {
 	url := "vless://a684455c-b14f-11ea-bf0d-42010aaa0003@127.0.0.1:" + port + "?version=" + strconv.Itoa(version)
-	fakeServerEndLocalServer, err := proxy.ServerFromURL(url)
-	if err != nil {
-		t.Log("fakeClientEndLocalServer parse err", err)
+	fakeServerEndLocalServer, hase, errx := proxy.ServerFromURL(url)
+	if hase {
+		t.Log("fakeClientEndLocalServer parse err", errx)
 		t.FailNow()
 	}
 	defer fakeServerEndLocalServer.Stop()
-	fakeClientEndRemoteClient, err := proxy.ClientFromURL(url)
-	if err != nil {
-		t.Log("fakeClientEndRemoteClient parse err", err)
+	fakeClientEndRemoteClient, hase, errx := proxy.ClientFromURL(url)
+	if hase {
+		t.Log("fakeClientEndRemoteClient parse err", errx)
 		t.FailNow()
 	}
 
diff --git a/quic/quic.go b/quic/quic.go
index 76640b7..ac423f6 100644
--- a/quic/quic.go
+++ b/quic/quic.go
@@ -76,9 +76,9 @@ var (
 	}
 )
 
-func ListenInitialLayers(addr string, tlsConf *tls.Config, useHysteria bool, hysteriaMaxByteCount int) (newConnChan chan net.Conn, baseConn any) {
+func ListenInitialLayers(addr string, tlsConf tls.Config, useHysteria bool, hysteriaMaxByteCount int) (newConnChan chan net.Conn, baseConn any) {
 
-	listener, err := quic.ListenAddr(addr, tlsConf, &our_ListenConfig)
+	listener, err := quic.ListenAddr(addr, &tlsConf, &our_ListenConfig)
 	if err != nil {
 		if utils.CanLogErr() {
 			log.Println(err)
@@ -140,8 +140,8 @@ func ListenInitialLayers(addr string, tlsConf *tls.Config, useHysteria bool, hys
 	return
 }
 
-func DialCommonInitialLayer(serverAddr *netLayer.Addr, tlsConf *tls.Config, useHysteria bool, hysteriaMaxByteCount int) any {
-	session, err := quic.DialAddr(serverAddr.String(), tlsConf, &our_DialConfig)
+func DialCommonInitialLayer(serverAddr *netLayer.Addr, tlsConf tls.Config, useHysteria bool, hysteriaMaxByteCount int) any {
+	session, err := quic.DialAddr(serverAddr.String(), &tlsConf, &our_DialConfig)
 	if err != nil {
 		if utils.CanLogErr() {
 			log.Println(err)
diff --git a/tlsLayer/server.go b/tlsLayer/server.go
index b1d7a60..aa2bb99 100644
--- a/tlsLayer/server.go
+++ b/tlsLayer/server.go
@@ -37,7 +37,7 @@ func (s *Server) Handshake(underlay net.Conn) (tlsConn *Conn, err error) {
 	rawTlsConn := tls.Server(underlay, s.tlsConfig)
 	err = rawTlsConn.Handshake()
 	if err != nil {
-		err = utils.NewErr("tlsLayer: tls握手失败", err)
+		err = utils.ErrInErr{ErrDesc: "tlsLayer: tls握手失败", ErrDetail: err}
 
 		return
 	}
diff --git a/tlsLayer/tls_test.go b/tlsLayer/tls_test.go
index cd557d0..561a22c 100644
--- a/tlsLayer/tls_test.go
+++ b/tlsLayer/tls_test.go
@@ -27,15 +27,15 @@ func testTls(protocol string, port string, t *testing.T) {
 	}
 
 	url := protocol + "://a684455c-b14f-11ea-bf0d-42010aaa0003@localhost:" + port + "?alterID=4&cert=../cert.pem&key=../cert.key&insecure=1"
-	server, err := proxy.ServerFromURL(url)
-	if err != nil {
-		t.Log("fail1", err)
+	server, hase, errx := proxy.ServerFromURL(url)
+	if hase {
+		t.Log("fail1", errx)
 		t.FailNow()
 	}
 	defer server.Stop()
-	client, err := proxy.ClientFromURL(url)
-	if err != nil {
-		t.Log("fail2", err)
+	client, hase, errx := proxy.ClientFromURL(url)
+	if hase {
+		t.Log("fail2", errx)
 		t.FailNow()
 	}
 
diff --git a/utils/buffers.go b/utils/buffers.go
index a0e21ad..5ec054f 100644
--- a/utils/buffers.go
+++ b/utils/buffers.go
@@ -136,6 +136,8 @@ func MergeBuffers(bs [][]byte) (result []byte, duplicate bool) {
 
 	} else {
 		result = make([]byte, allLen) //实际目前的readv实现也很难出现这种情况
+		// 一定要尽量避免这种情况，如果 MaxBufLen小于readv buf总长度，会导致严重的内存泄漏问题,
+		// 见github issue #24
 	}
 
 	cursor := 0
diff --git a/utils/error.go b/utils/error.go
index 80fd17f..2c597a8 100644
--- a/utils/error.go
+++ b/utils/error.go
@@ -34,7 +34,8 @@ func (ef ErrFirstBuffer) Error() string {
 }
 
 // 返回结构体，而不是指针, 这样可以避免内存逃逸到堆
-func NewErr(desc string, e error) ErrInErr {
+// 发现只要是函数就会逃逸到堆，自己初始化就没事。那就不提供初始化函数了。
+/*func NewErr(desc string, e error) ErrInErr {
 	return ErrInErr{
 		ErrDesc:   desc,
 		ErrDetail: e,
@@ -42,6 +43,7 @@ func NewErr(desc string, e error) ErrInErr {
 }
 
 // 返回结构体，而不是指针, 这样可以避免内存逃逸到堆
+
 func NewDataErr(desc string, e error, data interface{}) ErrInErr {
 	return ErrInErr{
 		ErrDesc:   desc,
@@ -49,6 +51,7 @@ func NewDataErr(desc string, e error, data interface{}) ErrInErr {
 		Data:      data,
 	}
 }
+*/
 
 // ErrInErr 很适合一个err包含另一个err，并且提供附带数据的情况.
 type ErrInErr struct {
diff --git a/version.go b/version.go
index 036aa47..2ce1d56 100644
--- a/version.go
+++ b/version.go
@@ -50,10 +50,10 @@ var Version string //版本号由 Makefile 里的 BUILD_VERSION 指定
 func printVersion() {
 	const desc = "verysimple, a very simple implementation of V2Ray with some innovation"
 
-	fmt.Printf("===============================\nverysimple %v (%v), %v %v %v\n", Version, desc, runtime.Version(), runtime.GOOS, runtime.GOARCH)
-	fmt.Println("Support tls and websocket for all protocols.")
+	fmt.Printf("===============================\nverysimple %s (%s), %s %s %s\n", Version, desc, runtime.Version(), runtime.GOOS, runtime.GOARCH)
+	fmt.Printf("Support tls and websocket for all protocols.\n")
 	if netLayer.HasEmbedGeoip() {
-		fmt.Println("Contains embeded Geoip file")
+		fmt.Printf("Contains embeded Geoip file\n")
 	}
 
 }
diff --git a/ws/client.go b/ws/client.go
index a6026cf..7099ea6 100644
--- a/ws/client.go
+++ b/ws/client.go
@@ -137,7 +137,7 @@ func (edc *EarlyDataConn) Write(p []byte) (int, error) {
 		_, encerr := io.Copy(encoder, multiReader)
 		if encerr != nil {
 			close(edc.firstHandshakeOkChan)
-			return 0, utils.NewErr("encode early data err", encerr)
+			return 0, utils.ErrInErr{ErrDesc: "encode early data err", ErrDetail: encerr}
 		}
 		encoder.Close()
 
diff --git a/ws/conn.go b/ws/conn.go
index b317377..5246cba 100644
--- a/ws/conn.go
+++ b/ws/conn.go
@@ -89,7 +89,7 @@ func (c *Conn) Read(p []byte) (int, error) {
 		*/
 
 		//log.Println("OpCode not Binary", h.OpCode)
-		return 0, utils.NewDataErr("ws OpCode not Binary", nil, h.OpCode)
+		return 0, utils.ErrInErr{ErrDesc: "ws OpCode not Binary", Data: h.OpCode}
 	}
 	//log.Println("Read next frame header ok,", h.Length, c.r.State.Fragmented(), "givenbuf len", len(p))