diff --git a/proxy/vmess/config.go b/proxy/vmess/config.go
index 4c0788c1e..87fc00d42 100644
--- a/proxy/vmess/config.go
+++ b/proxy/vmess/config.go
@@ -6,7 +6,7 @@ import (
 
 	v2net "github.com/v2ray/v2ray-core/common/net"
 	"github.com/v2ray/v2ray-core/log"
-	"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+  "github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 )
 
 type VMessUser struct {
@@ -14,9 +14,9 @@ type VMessUser struct {
 	Email string `json:"email"`
 }
 
-func (u *VMessUser) ToUser() (protocol.User, error) {
-	id, err := protocol.NewID(u.Id)
-	return protocol.User{
+func (u *VMessUser) ToUser() (user.User, error) {
+	id, err := user.NewID(u.Id)
+	return user.User{
 		Id: id,
 	}, err
 }
@@ -38,7 +38,7 @@ type VNextConfig struct {
 }
 
 func (config VNextConfig) ToVNextServer() VNextServer {
-	users := make([]protocol.User, 0, len(config.Users))
+	users := make([]user.User, 0, len(config.Users))
 	for _, user := range config.Users {
 		vuser, err := user.ToUser()
 		if err != nil {
diff --git a/proxy/vmess/protocol/id.go b/proxy/vmess/protocol/user/id.go
similarity index 98%
rename from proxy/vmess/protocol/id.go
rename to proxy/vmess/protocol/user/id.go
index 92cfa1927..c99e29b0e 100644
--- a/proxy/vmess/protocol/id.go
+++ b/proxy/vmess/protocol/user/id.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"crypto/md5"
diff --git a/proxy/vmess/protocol/id_test.go b/proxy/vmess/protocol/user/id_test.go
similarity index 95%
rename from proxy/vmess/protocol/id_test.go
rename to proxy/vmess/protocol/user/id_test.go
index 4d6313963..0e35d96b9 100644
--- a/proxy/vmess/protocol/id_test.go
+++ b/proxy/vmess/protocol/user/id_test.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"testing"
diff --git a/proxy/vmess/protocol/idhash.go b/proxy/vmess/protocol/user/idhash.go
similarity index 98%
rename from proxy/vmess/protocol/idhash.go
rename to proxy/vmess/protocol/user/idhash.go
index e382e792e..5c56afe3f 100644
--- a/proxy/vmess/protocol/idhash.go
+++ b/proxy/vmess/protocol/user/idhash.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"crypto/hmac"
diff --git a/proxy/vmess/protocol/inthash.go b/proxy/vmess/protocol/user/inthash.go
similarity index 93%
rename from proxy/vmess/protocol/inthash.go
rename to proxy/vmess/protocol/user/inthash.go
index 41258da82..e8cf2ab13 100644
--- a/proxy/vmess/protocol/inthash.go
+++ b/proxy/vmess/protocol/user/inthash.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"crypto/md5"
diff --git a/proxy/vmess/protocol/rand.go b/proxy/vmess/protocol/user/rand.go
similarity index 93%
rename from proxy/vmess/protocol/rand.go
rename to proxy/vmess/protocol/user/rand.go
index af9e9b7b1..3ca257f0f 100644
--- a/proxy/vmess/protocol/rand.go
+++ b/proxy/vmess/protocol/user/rand.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"math/rand"
diff --git a/proxy/vmess/protocol/rand_test.go b/proxy/vmess/protocol/user/rand_test.go
similarity index 95%
rename from proxy/vmess/protocol/rand_test.go
rename to proxy/vmess/protocol/user/rand_test.go
index 3a36a1968..b68bb865f 100644
--- a/proxy/vmess/protocol/rand_test.go
+++ b/proxy/vmess/protocol/user/rand_test.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"testing"
diff --git a/proxy/vmess/protocol/user.go b/proxy/vmess/protocol/user/user.go
similarity index 88%
rename from proxy/vmess/protocol/user.go
rename to proxy/vmess/protocol/user/user.go
index 47c3e70cc..4ef10733e 100644
--- a/proxy/vmess/protocol/user.go
+++ b/proxy/vmess/protocol/user/user.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 // User is the user account that is used for connection to a Point
 type User struct {
diff --git a/proxy/vmess/protocol/userset.go b/proxy/vmess/protocol/user/userset.go
similarity index 99%
rename from proxy/vmess/protocol/userset.go
rename to proxy/vmess/protocol/user/userset.go
index 20903907f..d944fb6ad 100644
--- a/proxy/vmess/protocol/userset.go
+++ b/proxy/vmess/protocol/user/userset.go
@@ -1,4 +1,4 @@
-package protocol
+package user
 
 import (
 	"container/heap"
diff --git a/proxy/vmess/protocol/vmess.go b/proxy/vmess/protocol/vmess.go
index 521a76d62..c165b30a7 100644
--- a/proxy/vmess/protocol/vmess.go
+++ b/proxy/vmess/protocol/vmess.go
@@ -15,6 +15,7 @@ import (
 	v2io "github.com/v2ray/v2ray-core/common/io"
 	v2net "github.com/v2ray/v2ray-core/common/net"
 	"github.com/v2ray/v2ray-core/log"
+  "github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 )
 
 const (
@@ -38,7 +39,7 @@ var (
 
 type VMessRequest struct {
 	Version        byte
-	UserId         ID
+	UserId         user.ID
 	RequestIV      [16]byte
 	RequestKey     [16]byte
 	ResponseHeader [4]byte
@@ -47,10 +48,10 @@ type VMessRequest struct {
 }
 
 type VMessRequestReader struct {
-	vUserSet UserSet
+	vUserSet user.UserSet
 }
 
-func NewVMessRequestReader(vUserSet UserSet) *VMessRequestReader {
+func NewVMessRequestReader(vUserSet user.UserSet) *VMessRequestReader {
 	return &VMessRequestReader{
 		vUserSet: vUserSet,
 	}
@@ -59,7 +60,7 @@ func NewVMessRequestReader(vUserSet UserSet) *VMessRequestReader {
 func (r *VMessRequestReader) Read(reader io.Reader) (*VMessRequest, error) {
 	buffer := make([]byte, 256)
 
-	nBytes, err := reader.Read(buffer[:IDBytesLen])
+	nBytes, err := reader.Read(buffer[:user.IDBytesLen])
 	if err != nil {
 		return nil, err
 	}
@@ -75,7 +76,7 @@ func (r *VMessRequestReader) Read(reader io.Reader) (*VMessRequest, error) {
 	if err != nil {
 		return nil, err
 	}
-	aesStream := cipher.NewCFBDecrypter(aesCipher, Int64Hash(timeSec))
+	aesStream := cipher.NewCFBDecrypter(aesCipher, user.Int64Hash(timeSec))
 	decryptor := v2io.NewCryptionReader(aesStream, reader)
 
 	if err != nil {
@@ -178,7 +179,7 @@ func (r *VMessRequestReader) Read(reader io.Reader) (*VMessRequest, error) {
 	return request, nil
 }
 
-func (request *VMessRequest) ToBytes(idHash CounterHash, randomRangeInt64 RandomInt64InRange) ([]byte, error) {
+func (request *VMessRequest) ToBytes(idHash user.CounterHash, randomRangeInt64 user.RandomInt64InRange) ([]byte, error) {
 	buffer := make([]byte, 0, 300)
 
 	counter := randomRangeInt64(time.Now().UTC().Unix(), 30)
@@ -235,7 +236,7 @@ func (request *VMessRequest) ToBytes(idHash CounterHash, randomRangeInt64 Random
 	if err != nil {
 		return nil, err
 	}
-	aesStream := cipher.NewCFBEncrypter(aesCipher, Int64Hash(counter))
+	aesStream := cipher.NewCFBEncrypter(aesCipher, user.Int64Hash(counter))
 	aesStream.XORKeyStream(buffer[encryptionBegin:encryptionEnd], buffer[encryptionBegin:encryptionEnd])
 
 	return buffer, nil
diff --git a/proxy/vmess/protocol/vmess_test.go b/proxy/vmess/protocol/vmess_test.go
index 13ff6e06f..0cb90abcc 100644
--- a/proxy/vmess/protocol/vmess_test.go
+++ b/proxy/vmess/protocol/vmess_test.go
@@ -5,8 +5,8 @@ import (
 	"crypto/rand"
 	"testing"
 
-	"github.com/v2ray/v2ray-core"
 	v2net "github.com/v2ray/v2ray-core/common/net"
+  	"github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 	"github.com/v2ray/v2ray-core/testing/mocks"
 	"github.com/v2ray/v2ray-core/testing/unit"
 )
@@ -14,13 +14,13 @@ import (
 func TestVMessSerialization(t *testing.T) {
 	assert := unit.Assert(t)
 
-	userId, err := core.NewID("2b2966ac-16aa-4fbf-8d81-c5f172a3da51")
+	userId, err := user.NewID("2b2966ac-16aa-4fbf-8d81-c5f172a3da51")
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	userSet := mocks.MockUserSet{[]core.ID{}, make(map[string]int), make(map[string]int64)}
-	userSet.AddUser(core.User{userId})
+	userSet := mocks.MockUserSet{[]user.ID{}, make(map[string]int), make(map[string]int64)}
+	userSet.AddUser(user.User{userId})
 
 	request := new(VMessRequest)
 	request.Version = byte(0x01)
@@ -45,7 +45,7 @@ func TestVMessSerialization(t *testing.T) {
 	request.Address = v2net.DomainAddress("v2ray.com", 80)
 
 	mockTime := int64(1823730)
-	buffer, err := request.ToBytes(NewTimeHash(HMACHash{}), func(base int64, delta int) int64 { return mockTime })
+	buffer, err := request.ToBytes(user.NewTimeHash(user.HMACHash{}), func(base int64, delta int) int64 { return mockTime })
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -69,9 +69,9 @@ func TestVMessSerialization(t *testing.T) {
 }
 
 func BenchmarkVMessRequestWriting(b *testing.B) {
-	userId, _ := core.NewID("2b2966ac-16aa-4fbf-8d81-c5f172a3da51")
-	userSet := mocks.MockUserSet{[]core.ID{}, make(map[string]int), make(map[string]int64)}
-	userSet.AddUser(core.User{userId})
+	userId, _ := user.NewID("2b2966ac-16aa-4fbf-8d81-c5f172a3da51")
+	userSet := mocks.MockUserSet{[]user.ID{}, make(map[string]int), make(map[string]int64)}
+	userSet.AddUser(user.User{userId})
 
 	request := new(VMessRequest)
 	request.Version = byte(0x01)
@@ -85,6 +85,6 @@ func BenchmarkVMessRequestWriting(b *testing.B) {
 	request.Address = v2net.DomainAddress("v2ray.com", 80)
 
 	for i := 0; i < b.N; i++ {
-		request.ToBytes(NewTimeHash(HMACHash{}), GenerateRandomInt64InRange)
+		request.ToBytes(user.NewTimeHash(user.HMACHash{}), user.GenerateRandomInt64InRange)
 	}
 }
diff --git a/proxy/vmess/vmessin.go b/proxy/vmess/vmessin.go
index 40c735ff9..b1ae34fc9 100644
--- a/proxy/vmess/vmessin.go
+++ b/proxy/vmess/vmessin.go
@@ -10,16 +10,17 @@ import (
 	v2io "github.com/v2ray/v2ray-core/common/io"
 	v2net "github.com/v2ray/v2ray-core/common/net"
 	"github.com/v2ray/v2ray-core/log"
-	protocol "github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+	"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+  "github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 )
 
 type VMessInboundHandler struct {
 	vPoint    *core.Point
-	clients   protocol.UserSet
+	clients   user.UserSet
 	accepting bool
 }
 
-func NewVMessInboundHandler(vp *core.Point, clients protocol.UserSet) *VMessInboundHandler {
+func NewVMessInboundHandler(vp *core.Point, clients user.UserSet) *VMessInboundHandler {
 	return &VMessInboundHandler{
 		vPoint:  vp,
 		clients: clients,
@@ -123,7 +124,7 @@ func (factory *VMessInboundHandlerFactory) Create(vp *core.Point, rawConfig []by
 	if err != nil {
 		panic(log.Error("VMessIn: Failed to load VMess inbound config: %v", err))
 	}
-	allowedClients := protocol.NewTimedUserSet()
+	allowedClients := user.NewTimedUserSet()
 	for _, client := range config.AllowedClients {
 		user, err := client.ToUser()
 		if err != nil {
diff --git a/proxy/vmess/vmessout.go b/proxy/vmess/vmessout.go
index 4ec59029a..74117aa25 100644
--- a/proxy/vmess/vmessout.go
+++ b/proxy/vmess/vmessout.go
@@ -11,13 +11,14 @@ import (
 	v2io "github.com/v2ray/v2ray-core/common/io"
 	v2net "github.com/v2ray/v2ray-core/common/net"
 	"github.com/v2ray/v2ray-core/log"
-	protocol "github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+	"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+  "github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 )
 
 // VNext is the next Point server in the connection chain.
 type VNextServer struct {
 	Address v2net.Address   // Address of VNext server
-	Users   []protocol.User // User accounts for accessing VNext.
+	Users   []user.User // User accounts for accessing VNext.
 }
 
 type VMessOutboundHandler struct {
@@ -34,7 +35,7 @@ func NewVMessOutboundHandler(vp *core.Point, vNextList []VNextServer, dest v2net
 	}
 }
 
-func (handler *VMessOutboundHandler) pickVNext() (v2net.Address, protocol.User) {
+func (handler *VMessOutboundHandler) pickVNext() (v2net.Address, user.User) {
 	vNextLen := len(handler.vNextList)
 	if vNextLen == 0 {
 		panic("VMessOut: Zero vNext is configured.")
@@ -101,7 +102,7 @@ func handleRequest(conn *net.TCPConn, request *protocol.VMessRequest, input <-ch
 		return
 	}
 
-	buffer, err := request.ToBytes(protocol.NewTimeHash(protocol.HMACHash{}), protocol.GenerateRandomInt64InRange)
+	buffer, err := request.ToBytes(user.NewTimeHash(user.HMACHash{}), user.GenerateRandomInt64InRange)
 	if err != nil {
 		log.Error("VMessOut: Failed to serialize VMess request: %v", err)
 		return
diff --git a/testing/coverage/coverall b/testing/coverage/coverall
index 53745cde0..bb39793bf 100755
--- a/testing/coverage/coverall
+++ b/testing/coverage/coverall
@@ -19,13 +19,12 @@ function test_package {
 
 echo "mode: set" > coverall.out
 
-test_package "." "."
-test_package "io/socks" "io/socks"
-test_package "io/vmess" "hash,io,io/vmess"
-test_package "math" "math"
-test_package "net" "net"
-test_package "net/socks" ".,io/socks,net,net/socks"
-test_package "net/vmess" ".,io,math,net,net/vmess"
+test_package "common/net" "common/net"
+test_package "proxy/socks" "proxy/socks,proxy/socks/protocol"
+test_package "proxy/socks/protocol" "proxy/socks/protocol"
+test_package "proxy/vmess" "common/io,common/net,proxy/vmess,proxy/vmess/protocol,proxy/vmess/protocol/user"
+test_package "proxy/vmess/protocol" "proxy/vmess/protocol,proxy/vmess/protocol/user"
+test_package "proxy/vmess/protocol/user" "proxy/vmess/protocol/user"
 
 if [ "$FAIL" -eq 0 ]; then
   $HOME/gopath/bin/goveralls -v -coverprofile=coverall.out -service=travis-ci -repotoken $COVERALLS_TOKEN
diff --git a/testing/mocks/mockuserset.go b/testing/mocks/mockuserset.go
index 53f125278..5b12b76ac 100644
--- a/testing/mocks/mockuserset.go
+++ b/testing/mocks/mockuserset.go
@@ -1,21 +1,21 @@
 package mocks
 
 import (
-	"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
+	"github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
 )
 
 type MockUserSet struct {
-	UserIds    []protocol.ID
+	UserIds    []user.ID
 	UserHashes map[string]int
 	Timestamps map[string]int64
 }
 
-func (us *MockUserSet) AddUser(user protocol.User) error {
+func (us *MockUserSet) AddUser(user user.User) error {
 	us.UserIds = append(us.UserIds, user.Id)
 	return nil
 }
 
-func (us *MockUserSet) GetUser(userhash []byte) (*protocol.ID, int64, bool) {
+func (us *MockUserSet) GetUser(userhash []byte) (*user.ID, int64, bool) {
 	idx, found := us.UserHashes[string(userhash)]
 	if found {
 		return &us.UserIds[idx], us.Timestamps[string(userhash)], true