diff --git a/cmd/acme.go b/cmd/acme.go
index c4cf196..991de94 100644
--- a/cmd/acme.go
+++ b/cmd/acme.go
@@ -3,11 +3,13 @@ package main
 import (
 	"context"
 	"crypto/tls"
+
 	"github.com/caddyserver/certmagic"
 )
 
 func acmeTLSConfig(domains []string, email string, disableHTTP bool, disableTLSALPN bool,
-	altHTTPPort int, altTLSALPNPort int) (*tls.Config, error) {
+	altHTTPPort int, altTLSALPNPort int,
+) (*tls.Config, error) {
 	certmagic.DefaultACME.Agreed = true
 	certmagic.DefaultACME.Email = email
 	certmagic.DefaultACME.DisableHTTPChallenge = disableHTTP
diff --git a/cmd/auth/cmd.go b/cmd/auth/cmd.go
index 2f4276d..d99e92e 100644
--- a/cmd/auth/cmd.go
+++ b/cmd/auth/cmd.go
@@ -1,11 +1,12 @@
 package auth
 
 import (
-	"github.com/sirupsen/logrus"
 	"net"
 	"os/exec"
 	"strconv"
 	"strings"
+
+	"github.com/sirupsen/logrus"
 )
 
 type CmdAuthProvider struct {
diff --git a/cmd/auth/http.go b/cmd/auth/http.go
index da4970f..4b9162d 100644
--- a/cmd/auth/http.go
+++ b/cmd/auth/http.go
@@ -3,10 +3,11 @@ package auth
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/sirupsen/logrus"
 	"io/ioutil"
 	"net"
 	"net/http"
+
+	"github.com/sirupsen/logrus"
 )
 
 type HTTPAuthProvider struct {
diff --git a/cmd/client.go b/cmd/client.go
index a835058..903a324 100644
--- a/cmd/client.go
+++ b/cmd/client.go
@@ -4,10 +4,6 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"errors"
-	"github.com/oschwald/geoip2-golang"
-	"github.com/tobyxdd/hysteria/pkg/pmtud_fix"
-	"github.com/tobyxdd/hysteria/pkg/redirect"
-	"github.com/yosuke-furukawa/json5/encoding/json5"
 	"io"
 	"io/ioutil"
 	"net"
@@ -15,6 +11,11 @@ import (
 	"os"
 	"time"
 
+	"github.com/oschwald/geoip2-golang"
+	"github.com/tobyxdd/hysteria/pkg/pmtud_fix"
+	"github.com/tobyxdd/hysteria/pkg/redirect"
+	"github.com/yosuke-furukawa/json5/encoding/json5"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lucas-clemente/quic-go/congestion"
 	"github.com/sirupsen/logrus"
diff --git a/cmd/client_gpl.go b/cmd/client_gpl.go
index 2b4b182..dd6a015 100644
--- a/cmd/client_gpl.go
+++ b/cmd/client_gpl.go
@@ -4,13 +4,14 @@
 package main
 
 import (
-	"github.com/sirupsen/logrus"
-	"github.com/tobyxdd/hysteria/pkg/core"
-	"github.com/tobyxdd/hysteria/pkg/tun"
 	"io"
 	"net"
 	"strings"
 	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/tobyxdd/hysteria/pkg/core"
+	"github.com/tobyxdd/hysteria/pkg/tun"
 )
 
 const license = `Hysteria is a feature-packed proxy & relay utility optimized for lossy, unstable connections.
diff --git a/cmd/config.go b/cmd/config.go
index d7b1881..b808467 100644
--- a/cmd/config.go
+++ b/cmd/config.go
@@ -3,11 +3,12 @@ package main
 import (
 	"errors"
 	"fmt"
-	"github.com/sirupsen/logrus"
-	"github.com/yosuke-furukawa/json5/encoding/json5"
 	"regexp"
 	"strconv"
 	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/yosuke-furukawa/json5/encoding/json5"
 )
 
 const (
diff --git a/cmd/kploader.go b/cmd/kploader.go
index b71b3d0..5d6f60e 100644
--- a/cmd/kploader.go
+++ b/cmd/kploader.go
@@ -2,9 +2,10 @@ package main
 
 import (
 	"crypto/tls"
+	"sync"
+
 	"github.com/fsnotify/fsnotify"
 	"github.com/sirupsen/logrus"
-	"sync"
 )
 
 type keypairLoader struct {
diff --git a/cmd/mmdb.go b/cmd/mmdb.go
index 1370959..f35185d 100644
--- a/cmd/mmdb.go
+++ b/cmd/mmdb.go
@@ -1,12 +1,13 @@
 package main
 
 import (
-	"github.com/oschwald/geoip2-golang"
-	"github.com/sirupsen/logrus"
-	"github.com/spf13/viper"
 	"io"
 	"net/http"
 	"os"
+
+	"github.com/oschwald/geoip2-golang"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
 )
 
 func downloadMMDB(filename string) error {
diff --git a/cmd/resolver.go b/cmd/resolver.go
index aefe81f..a0a8eca 100644
--- a/cmd/resolver.go
+++ b/cmd/resolver.go
@@ -2,10 +2,11 @@ package main
 
 import (
 	"errors"
-	rdns "github.com/folbricht/routedns"
-	"github.com/tobyxdd/hysteria/pkg/utils"
 	"net"
 	"strings"
+
+	rdns "github.com/folbricht/routedns"
+	"github.com/tobyxdd/hysteria/pkg/utils"
 )
 
 var errInvalidSyntax = errors.New("invalid syntax")
diff --git a/cmd/server.go b/cmd/server.go
index 7e79115..7d09755 100644
--- a/cmd/server.go
+++ b/cmd/server.go
@@ -3,6 +3,11 @@ package main
 import (
 	"crypto/tls"
 	"errors"
+	"io"
+	"net"
+	"net/http"
+	"time"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lucas-clemente/quic-go/congestion"
 	"github.com/oschwald/geoip2-golang"
@@ -18,10 +23,6 @@ import (
 	"github.com/tobyxdd/hysteria/pkg/sockopt"
 	"github.com/tobyxdd/hysteria/pkg/transport"
 	"github.com/yosuke-furukawa/json5/encoding/json5"
-	"io"
-	"net"
-	"net/http"
-	"time"
 )
 
 func server(config *serverConfig) {
diff --git a/pkg/acl/engine.go b/pkg/acl/engine.go
index 4b758a6..2d591f1 100644
--- a/pkg/acl/engine.go
+++ b/pkg/acl/engine.go
@@ -2,12 +2,13 @@ package acl
 
 import (
 	"bufio"
-	lru "github.com/hashicorp/golang-lru"
-	"github.com/oschwald/geoip2-golang"
-	"github.com/tobyxdd/hysteria/pkg/utils"
 	"net"
 	"os"
 	"strings"
+
+	lru "github.com/hashicorp/golang-lru"
+	"github.com/oschwald/geoip2-golang"
+	"github.com/tobyxdd/hysteria/pkg/utils"
 )
 
 const entryCacheSize = 1024
diff --git a/pkg/acl/engine_test.go b/pkg/acl/engine_test.go
index 4c30884..2a0694c 100644
--- a/pkg/acl/engine_test.go
+++ b/pkg/acl/engine_test.go
@@ -2,10 +2,11 @@ package acl
 
 import (
 	"errors"
-	lru "github.com/hashicorp/golang-lru"
 	"net"
 	"strings"
 	"testing"
+
+	lru "github.com/hashicorp/golang-lru"
 )
 
 func TestEngine_ResolveAndMatch(t *testing.T) {
diff --git a/pkg/acl/entry.go b/pkg/acl/entry.go
index bc345aa..5cec192 100644
--- a/pkg/acl/entry.go
+++ b/pkg/acl/entry.go
@@ -3,14 +3,17 @@ package acl
 import (
 	"errors"
 	"fmt"
-	"github.com/oschwald/geoip2-golang"
 	"net"
 	"strconv"
 	"strings"
+
+	"github.com/oschwald/geoip2-golang"
 )
 
-type Action byte
-type Protocol byte
+type (
+	Action   byte
+	Protocol byte
+)
 
 const (
 	ActionDirect = Action(iota)
diff --git a/pkg/acl/entry_test.go b/pkg/acl/entry_test.go
index 37b8807..d620197 100644
--- a/pkg/acl/entry_test.go
+++ b/pkg/acl/entry_test.go
@@ -19,46 +19,64 @@ func TestParseEntry(t *testing.T) {
 		wantErr bool
 	}{
 		{name: "empty", args: args{""}, want: Entry{}, wantErr: true},
-		{name: "ok 1", args: args{"direct domain-suffix google.com"},
+		{
+			name: "ok 1", args: args{"direct domain-suffix google.com"},
 			want: Entry{ActionDirect, "", &domainMatcher{
 				matcherBase: matcherBase{},
 				Domain:      "google.com",
 				Suffix:      true,
 			}},
-			wantErr: false},
-		{name: "ok 2", args: args{"proxy domain shithole"},
+			wantErr: false,
+		},
+		{
+			name: "ok 2", args: args{"proxy domain shithole"},
 			want: Entry{ActionProxy, "", &domainMatcher{
 				matcherBase: matcherBase{},
 				Domain:      "shithole",
 				Suffix:      false,
 			}},
-			wantErr: false},
-		{name: "ok 3", args: args{"block cidr 8.8.8.0/24 */53"},
+			wantErr: false,
+		},
+		{
+			name: "ok 3", args: args{"block cidr 8.8.8.0/24 */53"},
 			want: Entry{ActionBlock, "", &netMatcher{
 				matcherBase: matcherBase{ProtocolAll, 53},
 				Net:         ok3net,
 			}},
-			wantErr: false},
-		{name: "ok 4", args: args{"hijack all udp/* udpblackhole.net"},
+			wantErr: false,
+		},
+		{
+			name: "ok 4", args: args{"hijack all udp/* udpblackhole.net"},
 			want: Entry{ActionHijack, "udpblackhole.net", &allMatcher{
 				matcherBase: matcherBase{ProtocolUDP, 0},
 			}},
-			wantErr: false},
-		{name: "err 1", args: args{"what the heck"},
+			wantErr: false,
+		},
+		{
+			name: "err 1", args: args{"what the heck"},
 			want:    Entry{},
-			wantErr: true},
-		{name: "err 2", args: args{"proxy sucks ass"},
+			wantErr: true,
+		},
+		{
+			name: "err 2", args: args{"proxy sucks ass"},
 			want:    Entry{},
-			wantErr: true},
-		{name: "err 3", args: args{"block ip 999.999.999.999"},
+			wantErr: true,
+		},
+		{
+			name: "err 3", args: args{"block ip 999.999.999.999"},
 			want:    Entry{},
-			wantErr: true},
-		{name: "err 4", args: args{"hijack domain google.com"},
+			wantErr: true,
+		},
+		{
+			name: "err 4", args: args{"hijack domain google.com"},
 			want:    Entry{},
-			wantErr: true},
-		{name: "err 5", args: args{"hijack domain google.com bing.com 123"},
+			wantErr: true,
+		},
+		{
+			name: "err 5", args: args{"hijack domain google.com bing.com 123"},
 			want:    Entry{},
-			wantErr: true},
+			wantErr: true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
diff --git a/pkg/congestion/brutal.go b/pkg/congestion/brutal.go
index d08ac34..02f12d4 100644
--- a/pkg/congestion/brutal.go
+++ b/pkg/congestion/brutal.go
@@ -1,8 +1,9 @@
 package congestion
 
 import (
-	"github.com/lucas-clemente/quic-go/congestion"
 	"time"
+
+	"github.com/lucas-clemente/quic-go/congestion"
 )
 
 const (
@@ -66,12 +67,14 @@ func (b *BrutalSender) GetCongestionWindow() congestion.ByteCount {
 }
 
 func (b *BrutalSender) OnPacketSent(sentTime time.Time, bytesInFlight congestion.ByteCount,
-	packetNumber congestion.PacketNumber, bytes congestion.ByteCount, isRetransmittable bool) {
+	packetNumber congestion.PacketNumber, bytes congestion.ByteCount, isRetransmittable bool,
+) {
 	b.pacer.SentPacket(sentTime, bytes)
 }
 
 func (b *BrutalSender) OnPacketAcked(number congestion.PacketNumber, ackedBytes congestion.ByteCount,
-	priorInFlight congestion.ByteCount, eventTime time.Time) {
+	priorInFlight congestion.ByteCount, eventTime time.Time,
+) {
 	currentTimestamp := eventTime.Unix()
 	slot := currentTimestamp % pktInfoSlotCount
 	if b.pktInfoSlots[slot].Timestamp == currentTimestamp {
@@ -86,7 +89,8 @@ func (b *BrutalSender) OnPacketAcked(number congestion.PacketNumber, ackedBytes
 }
 
 func (b *BrutalSender) OnPacketLost(number congestion.PacketNumber, lostBytes congestion.ByteCount,
-	priorInFlight congestion.ByteCount) {
+	priorInFlight congestion.ByteCount,
+) {
 	currentTimestamp := time.Now().Unix()
 	slot := currentTimestamp % pktInfoSlotCount
 	if b.pktInfoSlots[slot].Timestamp == currentTimestamp {
diff --git a/pkg/congestion/pacer.go b/pkg/congestion/pacer.go
index 4370710..907cddc 100644
--- a/pkg/congestion/pacer.go
+++ b/pkg/congestion/pacer.go
@@ -1,9 +1,10 @@
 package congestion
 
 import (
-	"github.com/lucas-clemente/quic-go/congestion"
 	"math"
 	"time"
+
+	"github.com/lucas-clemente/quic-go/congestion"
 )
 
 const (
diff --git a/pkg/conns/faketcp/obfs.go b/pkg/conns/faketcp/obfs.go
index 7f0f70c..5a774a0 100644
--- a/pkg/conns/faketcp/obfs.go
+++ b/pkg/conns/faketcp/obfs.go
@@ -1,11 +1,12 @@
 package faketcp
 
 import (
-	"github.com/tobyxdd/hysteria/pkg/obfs"
 	"net"
 	"sync"
 	"syscall"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/obfs"
 )
 
 const udpBufferSize = 65535
diff --git a/pkg/conns/faketcp/tcp_test.go b/pkg/conns/faketcp/tcp_test.go
index ea26c68..fa850b8 100644
--- a/pkg/conns/faketcp/tcp_test.go
+++ b/pkg/conns/faketcp/tcp_test.go
@@ -11,12 +11,14 @@ import (
 	"testing"
 )
 
-//const testPortStream = "127.0.0.1:3456"
-//const testPortPacket = "127.0.0.1:3457"
+// const testPortStream = "127.0.0.1:3456"
+// const testPortPacket = "127.0.0.1:3457"
 
-const testPortStream = "127.0.0.1:3456"
-const portServerPacket = "[::]:3457"
-const portRemotePacket = "127.0.0.1:3457"
+const (
+	testPortStream   = "127.0.0.1:3456"
+	portServerPacket = "[::]:3457"
+	portRemotePacket = "127.0.0.1:3457"
+)
 
 func init() {
 	startTCPServer()
@@ -70,7 +72,7 @@ func startTCPRawServer() *TCPConn {
 				log.Println("server readfrom:", err)
 				return
 			}
-			//echo
+			// echo
 			n, err = conn.WriteTo(buf[:n], addr)
 			if err != nil {
 				log.Println("server writeTo:", err)
diff --git a/pkg/conns/udp/obfs.go b/pkg/conns/udp/obfs.go
index bfe4fd6..ecd509e 100644
--- a/pkg/conns/udp/obfs.go
+++ b/pkg/conns/udp/obfs.go
@@ -1,12 +1,13 @@
 package udp
 
 import (
-	"github.com/tobyxdd/hysteria/pkg/obfs"
 	"net"
 	"os"
 	"sync"
 	"syscall"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/obfs"
 )
 
 const udpBufferSize = 65535
diff --git a/pkg/conns/wechat/obfs.go b/pkg/conns/wechat/obfs.go
index 4475e2f..78925ea 100644
--- a/pkg/conns/wechat/obfs.go
+++ b/pkg/conns/wechat/obfs.go
@@ -2,13 +2,14 @@ package wechat
 
 import (
 	"encoding/binary"
-	"github.com/tobyxdd/hysteria/pkg/obfs"
 	"math/rand"
 	"net"
 	"os"
 	"sync"
 	"syscall"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/obfs"
 )
 
 const udpBufferSize = 65535
diff --git a/pkg/core/client.go b/pkg/core/client.go
index f4c2ab6..2477f3d 100644
--- a/pkg/core/client.go
+++ b/pkg/core/client.go
@@ -6,6 +6,12 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"math/rand"
+	"net"
+	"strconv"
+	"sync"
+	"time"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lucas-clemente/quic-go/congestion"
 	"github.com/lunixbochs/struc"
@@ -13,16 +19,9 @@ import (
 	"github.com/tobyxdd/hysteria/pkg/pmtud_fix"
 	"github.com/tobyxdd/hysteria/pkg/transport"
 	"github.com/tobyxdd/hysteria/pkg/utils"
-	"math/rand"
-	"net"
-	"strconv"
-	"sync"
-	"time"
 )
 
-var (
-	ErrClosed = errors.New("closed")
-)
+var ErrClosed = errors.New("closed")
 
 type CongestionFactory func(refBPS uint64) congestion.CongestionControl
 
@@ -49,7 +48,8 @@ type Client struct {
 
 func NewClient(serverAddr string, protocol string, auth []byte, tlsConfig *tls.Config, quicConfig *quic.Config,
 	transport *transport.ClientTransport, sendBPS uint64, recvBPS uint64, congestionFactory CongestionFactory,
-	obfuscator obfs.Obfuscator) (*Client, error) {
+	obfuscator obfs.Obfuscator,
+) (*Client, error) {
 	quicConfig.DisablePathMTUDiscovery = quicConfig.DisablePathMTUDiscovery || pmtud_fix.DisablePathMTUDiscovery
 	c := &Client{
 		transport:         transport,
diff --git a/pkg/core/frag_test.go b/pkg/core/frag_test.go
index f2f2462..aa1c616 100644
--- a/pkg/core/frag_test.go
+++ b/pkg/core/frag_test.go
@@ -32,7 +32,7 @@ func Test_fragUDPMessage(t *testing.T) {
 				100,
 			},
 			[]udpMessage{
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -62,7 +62,7 @@ func Test_fragUDPMessage(t *testing.T) {
 				22,
 			},
 			[]udpMessage{
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -73,7 +73,7 @@ func Test_fragUDPMessage(t *testing.T) {
 					DataLen:   4,
 					Data:      []byte("hell"),
 				},
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -103,7 +103,7 @@ func Test_fragUDPMessage(t *testing.T) {
 				23,
 			},
 			[]udpMessage{
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -114,7 +114,7 @@ func Test_fragUDPMessage(t *testing.T) {
 					DataLen:   5,
 					Data:      []byte("wow w"),
 				},
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -125,7 +125,7 @@ func Test_fragUDPMessage(t *testing.T) {
 					DataLen:   5,
 					Data:      []byte("ow wo"),
 				},
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
@@ -136,7 +136,7 @@ func Test_fragUDPMessage(t *testing.T) {
 					DataLen:   5,
 					Data:      []byte("w lol"),
 				},
-				udpMessage{
+				{
 					SessionID: 123,
 					HostLen:   4,
 					Host:      "test",
diff --git a/pkg/core/server.go b/pkg/core/server.go
index 04d8871..dd3a908 100644
--- a/pkg/core/server.go
+++ b/pkg/core/server.go
@@ -5,6 +5,8 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"net"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lunixbochs/struc"
 	"github.com/prometheus/client_golang/prometheus"
@@ -12,15 +14,16 @@ import (
 	"github.com/tobyxdd/hysteria/pkg/obfs"
 	"github.com/tobyxdd/hysteria/pkg/pmtud_fix"
 	"github.com/tobyxdd/hysteria/pkg/transport"
-	"net"
 )
 
-type ConnectFunc func(addr net.Addr, auth []byte, sSend uint64, sRecv uint64) (bool, string)
-type DisconnectFunc func(addr net.Addr, auth []byte, err error)
-type TCPRequestFunc func(addr net.Addr, auth []byte, reqAddr string, action acl.Action, arg string)
-type TCPErrorFunc func(addr net.Addr, auth []byte, reqAddr string, err error)
-type UDPRequestFunc func(addr net.Addr, auth []byte, sessionID uint32)
-type UDPErrorFunc func(addr net.Addr, auth []byte, sessionID uint32, err error)
+type (
+	ConnectFunc    func(addr net.Addr, auth []byte, sSend uint64, sRecv uint64) (bool, string)
+	DisconnectFunc func(addr net.Addr, auth []byte, err error)
+	TCPRequestFunc func(addr net.Addr, auth []byte, reqAddr string, action acl.Action, arg string)
+	TCPErrorFunc   func(addr net.Addr, auth []byte, reqAddr string, err error)
+	UDPRequestFunc func(addr net.Addr, auth []byte, sessionID uint32)
+	UDPErrorFunc   func(addr net.Addr, auth []byte, sessionID uint32, err error)
+)
 
 type Server struct {
 	transport         *transport.ServerTransport
@@ -46,7 +49,8 @@ func NewServer(addr string, protocol string, tlsConfig *tls.Config, quicConfig *
 	sendBPS uint64, recvBPS uint64, congestionFactory CongestionFactory, disableUDP bool, aclEngine *acl.Engine,
 	obfuscator obfs.Obfuscator, connectFunc ConnectFunc, disconnectFunc DisconnectFunc,
 	tcpRequestFunc TCPRequestFunc, tcpErrorFunc TCPErrorFunc,
-	udpRequestFunc UDPRequestFunc, udpErrorFunc UDPErrorFunc, promRegistry *prometheus.Registry) (*Server, error) {
+	udpRequestFunc UDPRequestFunc, udpErrorFunc UDPErrorFunc, promRegistry *prometheus.Registry,
+) (*Server, error) {
 	quicConfig.DisablePathMTUDiscovery = quicConfig.DisablePathMTUDiscovery || pmtud_fix.DisablePathMTUDiscovery
 	listener, err := transport.QUICListen(protocol, addr, tlsConfig, quicConfig, obfuscator)
 	if err != nil {
diff --git a/pkg/core/server_client.go b/pkg/core/server_client.go
index 6f1a19e..05b5d15 100644
--- a/pkg/core/server_client.go
+++ b/pkg/core/server_client.go
@@ -4,16 +4,17 @@ import (
 	"bytes"
 	"context"
 	"encoding/base64"
+	"math/rand"
+	"net"
+	"strconv"
+	"sync"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lunixbochs/struc"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/tobyxdd/hysteria/pkg/acl"
 	"github.com/tobyxdd/hysteria/pkg/transport"
 	"github.com/tobyxdd/hysteria/pkg/utils"
-	"math/rand"
-	"net"
-	"strconv"
-	"sync"
 )
 
 const udpBufferSize = 65535
@@ -44,7 +45,8 @@ func newServerClient(v2 bool, cs quic.Connection, tr *transport.ServerTransport,
 	CTCPRequestFunc TCPRequestFunc, CTCPErrorFunc TCPErrorFunc,
 	CUDPRequestFunc UDPRequestFunc, CUDPErrorFunc UDPErrorFunc,
 	UpCounterVec, DownCounterVec *prometheus.CounterVec,
-	ConnGaugeVec *prometheus.GaugeVec) *serverClient {
+	ConnGaugeVec *prometheus.GaugeVec,
+) *serverClient {
 	sc := &serverClient{
 		V2:              v2,
 		CS:              cs,
diff --git a/pkg/core/stream.go b/pkg/core/stream.go
index 8ace4a1..7771036 100644
--- a/pkg/core/stream.go
+++ b/pkg/core/stream.go
@@ -2,8 +2,9 @@ package core
 
 import (
 	"context"
-	"github.com/lucas-clemente/quic-go"
 	"time"
+
+	"github.com/lucas-clemente/quic-go"
 )
 
 // Handle stream close properly
diff --git a/pkg/http/server.go b/pkg/http/server.go
index 5afef7a..ddd1086 100644
--- a/pkg/http/server.go
+++ b/pkg/http/server.go
@@ -3,12 +3,13 @@ package http
 import (
 	"errors"
 	"fmt"
-	"github.com/tobyxdd/hysteria/pkg/transport"
-	"github.com/tobyxdd/hysteria/pkg/utils"
 	"net"
 	"net/http"
 	"time"
 
+	"github.com/tobyxdd/hysteria/pkg/transport"
+	"github.com/tobyxdd/hysteria/pkg/utils"
+
 	"github.com/elazarl/goproxy/ext/auth"
 
 	"github.com/elazarl/goproxy"
@@ -18,7 +19,8 @@ import (
 
 func NewProxyHTTPServer(hyClient *core.Client, transport *transport.ClientTransport, idleTimeout time.Duration,
 	aclEngine *acl.Engine, newDialFunc func(reqAddr string, action acl.Action, arg string),
-	basicAuthFunc func(user, password string) bool) (*goproxy.ProxyHttpServer, error) {
+	basicAuthFunc func(user, password string) bool,
+) (*goproxy.ProxyHttpServer, error) {
 	proxy := goproxy.NewProxyHttpServer()
 	proxy.Logger = &nopLogger{}
 	proxy.NonproxyHandler = http.NotFoundHandler()
diff --git a/pkg/redirect/tcp_linux.go b/pkg/redirect/tcp_linux.go
index b9f8130..1cd7ae1 100644
--- a/pkg/redirect/tcp_linux.go
+++ b/pkg/redirect/tcp_linux.go
@@ -3,11 +3,12 @@ package redirect
 import (
 	"encoding/binary"
 	"errors"
-	"github.com/tobyxdd/hysteria/pkg/core"
-	"github.com/tobyxdd/hysteria/pkg/utils"
 	"net"
 	"syscall"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
+	"github.com/tobyxdd/hysteria/pkg/utils"
 )
 
 type TCPRedirect struct {
@@ -21,7 +22,8 @@ type TCPRedirect struct {
 
 func NewTCPRedirect(hyClient *core.Client, listen string, timeout time.Duration,
 	connFunc func(addr, reqAddr net.Addr),
-	errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPRedirect, error) {
+	errorFunc func(addr, reqAddr net.Addr, err error),
+) (*TCPRedirect, error) {
 	tAddr, err := net.ResolveTCPAddr("tcp", listen)
 	if err != nil {
 		return nil, err
diff --git a/pkg/redirect/tcp_stub.go b/pkg/redirect/tcp_stub.go
index a7aaa1a..5e61565 100644
--- a/pkg/redirect/tcp_stub.go
+++ b/pkg/redirect/tcp_stub.go
@@ -5,16 +5,18 @@ package redirect
 
 import (
 	"errors"
-	"github.com/tobyxdd/hysteria/pkg/core"
 	"net"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
 )
 
 type TCPRedirect struct{}
 
 func NewTCPRedirect(hyClient *core.Client, listen string, timeout time.Duration,
 	connFunc func(addr, reqAddr net.Addr),
-	errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPRedirect, error) {
+	errorFunc func(addr, reqAddr net.Addr, err error),
+) (*TCPRedirect, error) {
 	return nil, errors.New("not supported on the current system")
 }
 
diff --git a/pkg/relay/tcp.go b/pkg/relay/tcp.go
index 9e16349..d8d9e2c 100644
--- a/pkg/relay/tcp.go
+++ b/pkg/relay/tcp.go
@@ -1,10 +1,11 @@
 package relay
 
 import (
-	"github.com/tobyxdd/hysteria/pkg/core"
-	"github.com/tobyxdd/hysteria/pkg/utils"
 	"net"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
+	"github.com/tobyxdd/hysteria/pkg/utils"
 )
 
 type TCPRelay struct {
@@ -18,7 +19,8 @@ type TCPRelay struct {
 }
 
 func NewTCPRelay(hyClient *core.Client, listen, remote string, timeout time.Duration,
-	connFunc func(addr net.Addr), errorFunc func(addr net.Addr, err error)) (*TCPRelay, error) {
+	connFunc func(addr net.Addr), errorFunc func(addr net.Addr, err error),
+) (*TCPRelay, error) {
 	tAddr, err := net.ResolveTCPAddr("tcp", listen)
 	if err != nil {
 		return nil, err
diff --git a/pkg/relay/udp.go b/pkg/relay/udp.go
index c1181d7..0eba012 100644
--- a/pkg/relay/udp.go
+++ b/pkg/relay/udp.go
@@ -2,11 +2,12 @@ package relay
 
 import (
 	"errors"
-	"github.com/tobyxdd/hysteria/pkg/core"
 	"net"
 	"sync"
 	"sync/atomic"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
 )
 
 const udpBufferSize = 65535
@@ -24,7 +25,8 @@ type UDPRelay struct {
 }
 
 func NewUDPRelay(hyClient *core.Client, listen, remote string, timeout time.Duration,
-	connFunc func(addr net.Addr), errorFunc func(addr net.Addr, err error)) (*UDPRelay, error) {
+	connFunc func(addr net.Addr), errorFunc func(addr net.Addr, err error),
+) (*UDPRelay, error) {
 	uAddr, err := net.ResolveUDPAddr("udp", listen)
 	if err != nil {
 		return nil, err
diff --git a/pkg/socks5/server.go b/pkg/socks5/server.go
index 3c50c4b..0e33f20 100644
--- a/pkg/socks5/server.go
+++ b/pkg/socks5/server.go
@@ -4,17 +4,19 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"strconv"
+
 	"github.com/tobyxdd/hysteria/pkg/acl"
 	"github.com/tobyxdd/hysteria/pkg/core"
 	"github.com/tobyxdd/hysteria/pkg/transport"
 	"github.com/tobyxdd/hysteria/pkg/utils"
-	"strconv"
 )
 
 import (
-	"github.com/txthinking/socks5"
 	"net"
 	"time"
+
+	"github.com/txthinking/socks5"
 )
 
 const udpBufferSize = 65535
@@ -47,7 +49,8 @@ func NewServer(hyClient *core.Client, transport *transport.ClientTransport, addr
 	aclEngine *acl.Engine, disableUDP bool,
 	tcpReqFunc func(addr net.Addr, reqAddr string, action acl.Action, arg string),
 	tcpErrorFunc func(addr net.Addr, reqAddr string, err error),
-	udpAssocFunc func(addr net.Addr), udpErrorFunc func(addr net.Addr, err error)) (*Server, error) {
+	udpAssocFunc func(addr net.Addr), udpErrorFunc func(addr net.Addr, err error),
+) (*Server, error) {
 	tAddr, err := net.ResolveTCPAddr("tcp", addr)
 	if err != nil {
 		return nil, err
diff --git a/pkg/tproxy/tcp_linux.go b/pkg/tproxy/tcp_linux.go
index 3d8fc11..fd9bb50 100644
--- a/pkg/tproxy/tcp_linux.go
+++ b/pkg/tproxy/tcp_linux.go
@@ -1,11 +1,12 @@
 package tproxy
 
 import (
+	"net"
+	"time"
+
 	"github.com/LiamHaworth/go-tproxy"
 	"github.com/tobyxdd/hysteria/pkg/core"
 	"github.com/tobyxdd/hysteria/pkg/utils"
-	"net"
-	"time"
 )
 
 type TCPTProxy struct {
@@ -19,7 +20,8 @@ type TCPTProxy struct {
 
 func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
 	connFunc func(addr, reqAddr net.Addr),
-	errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
+	errorFunc func(addr, reqAddr net.Addr, err error),
+) (*TCPTProxy, error) {
 	tAddr, err := net.ResolveTCPAddr("tcp", listen)
 	if err != nil {
 		return nil, err
diff --git a/pkg/tproxy/tcp_stub.go b/pkg/tproxy/tcp_stub.go
index a527c07..ff5766d 100644
--- a/pkg/tproxy/tcp_stub.go
+++ b/pkg/tproxy/tcp_stub.go
@@ -5,16 +5,18 @@ package tproxy
 
 import (
 	"errors"
-	"github.com/tobyxdd/hysteria/pkg/core"
 	"net"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
 )
 
 type TCPTProxy struct{}
 
 func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
 	connFunc func(addr, reqAddr net.Addr),
-	errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
+	errorFunc func(addr, reqAddr net.Addr, err error),
+) (*TCPTProxy, error) {
 	return nil, errors.New("not supported on the current system")
 }
 
diff --git a/pkg/tproxy/udp_linux.go b/pkg/tproxy/udp_linux.go
index f28b95b..4df1b5f 100644
--- a/pkg/tproxy/udp_linux.go
+++ b/pkg/tproxy/udp_linux.go
@@ -1,10 +1,11 @@
 package tproxy
 
 import (
-	"github.com/LiamHaworth/go-tproxy"
-	"github.com/tobyxdd/hysteria/pkg/core"
 	"net"
 	"time"
+
+	"github.com/LiamHaworth/go-tproxy"
+	"github.com/tobyxdd/hysteria/pkg/core"
 )
 
 const udpBufferSize = 65535
@@ -20,7 +21,8 @@ type UDPTProxy struct {
 
 func NewUDPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
 	connFunc func(addr, reqAddr net.Addr),
-	errorFunc func(addr, reqAddr net.Addr, err error)) (*UDPTProxy, error) {
+	errorFunc func(addr, reqAddr net.Addr, err error),
+) (*UDPTProxy, error) {
 	uAddr, err := net.ResolveUDPAddr("udp", listen)
 	if err != nil {
 		return nil, err
diff --git a/pkg/tproxy/udp_stub.go b/pkg/tproxy/udp_stub.go
index 98b5c42..4fe65df 100644
--- a/pkg/tproxy/udp_stub.go
+++ b/pkg/tproxy/udp_stub.go
@@ -5,9 +5,10 @@ package tproxy
 
 import (
 	"errors"
-	"github.com/tobyxdd/hysteria/pkg/core"
 	"net"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
 )
 
 var ErrTimeout = errors.New("inactivity timeout")
@@ -15,7 +16,8 @@ var ErrTimeout = errors.New("inactivity timeout")
 type UDPTProxy struct{}
 
 func NewUDPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
-	connFunc func(addr, reqAddr net.Addr), errorFunc func(addr, reqAddr net.Addr, err error)) (*UDPTProxy, error) {
+	connFunc func(addr, reqAddr net.Addr), errorFunc func(addr, reqAddr net.Addr, err error),
+) (*UDPTProxy, error) {
 	return nil, errors.New("not supported on the current system")
 }
 
diff --git a/pkg/transport/client.go b/pkg/transport/client.go
index 4ee1722..80417d5 100644
--- a/pkg/transport/client.go
+++ b/pkg/transport/client.go
@@ -3,13 +3,14 @@ package transport
 import (
 	"crypto/tls"
 	"fmt"
+	"net"
+	"time"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/tobyxdd/hysteria/pkg/conns/faketcp"
 	"github.com/tobyxdd/hysteria/pkg/conns/udp"
 	"github.com/tobyxdd/hysteria/pkg/conns/wechat"
 	"github.com/tobyxdd/hysteria/pkg/obfs"
-	"net"
-	"time"
 )
 
 type ClientTransport struct {
diff --git a/pkg/transport/server.go b/pkg/transport/server.go
index 9890ab3..a2a702d 100644
--- a/pkg/transport/server.go
+++ b/pkg/transport/server.go
@@ -3,6 +3,10 @@ package transport
 import (
 	"crypto/tls"
 	"fmt"
+	"net"
+	"strconv"
+	"time"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/tobyxdd/hysteria/pkg/conns/faketcp"
 	"github.com/tobyxdd/hysteria/pkg/conns/udp"
@@ -10,9 +14,6 @@ import (
 	"github.com/tobyxdd/hysteria/pkg/obfs"
 	"github.com/tobyxdd/hysteria/pkg/sockopt"
 	"github.com/tobyxdd/hysteria/pkg/utils"
-	"net"
-	"strconv"
-	"time"
 )
 
 type ServerTransport struct {
diff --git a/pkg/transport/socks5.go b/pkg/transport/socks5.go
index 50b4388..469db7a 100644
--- a/pkg/transport/socks5.go
+++ b/pkg/transport/socks5.go
@@ -4,9 +4,10 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"github.com/txthinking/socks5"
 	"net"
 	"time"
+
+	"github.com/txthinking/socks5"
 )
 
 type SOCKS5Client struct {
diff --git a/pkg/tun/server.go b/pkg/tun/server.go
index b3ed73d..3089a1e 100644
--- a/pkg/tun/server.go
+++ b/pkg/tun/server.go
@@ -5,6 +5,13 @@ package tun
 
 import (
 	"fmt"
+	"net"
+	"os"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"time"
+
 	"github.com/sirupsen/logrus"
 	"github.com/tobyxdd/hysteria/pkg/core"
 	t2score "github.com/xjasonlyu/tun2socks/v2/core"
@@ -13,12 +20,6 @@ import (
 	"github.com/xjasonlyu/tun2socks/v2/core/device/fdbased"
 	"github.com/xjasonlyu/tun2socks/v2/core/device/tun"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
-	"net"
-	"os"
-	"os/signal"
-	"strconv"
-	"syscall"
-	"time"
 )
 
 var _ adapter.TransportHandler = (*Server)(nil)
diff --git a/pkg/tun/tcp.go b/pkg/tun/tcp.go
index df61dcc..9858271 100644
--- a/pkg/tun/tcp.go
+++ b/pkg/tun/tcp.go
@@ -4,9 +4,10 @@
 package tun
 
 import (
+	"net"
+
 	"github.com/tobyxdd/hysteria/pkg/utils"
 	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
-	"net"
 )
 
 func (s *Server) HandleTCP(localConn adapter.TCPConn) {
diff --git a/pkg/tun/udp.go b/pkg/tun/udp.go
index 167fbf3..8b92c67 100644
--- a/pkg/tun/udp.go
+++ b/pkg/tun/udp.go
@@ -5,11 +5,12 @@ package tun
 
 import (
 	"fmt"
-	"github.com/tobyxdd/hysteria/pkg/core"
-	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
 	"net"
 	"strconv"
 	"time"
+
+	"github.com/tobyxdd/hysteria/pkg/core"
+	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
 )
 
 const udpBufferSize = 65535