mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-23 11:53:33 +02:00
392 lines
11 KiB
Go
392 lines
11 KiB
Go
package inbound
|
|
|
|
//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/xtls/xray-core/common"
|
|
"github.com/xtls/xray-core/common/buf"
|
|
"github.com/xtls/xray-core/common/errors"
|
|
"github.com/xtls/xray-core/common/log"
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/platform"
|
|
"github.com/xtls/xray-core/common/protocol"
|
|
"github.com/xtls/xray-core/common/session"
|
|
"github.com/xtls/xray-core/common/signal"
|
|
"github.com/xtls/xray-core/common/task"
|
|
"github.com/xtls/xray-core/common/uuid"
|
|
"github.com/xtls/xray-core/core"
|
|
feature_inbound "github.com/xtls/xray-core/features/inbound"
|
|
"github.com/xtls/xray-core/features/policy"
|
|
"github.com/xtls/xray-core/features/routing"
|
|
"github.com/xtls/xray-core/proxy/vmess"
|
|
"github.com/xtls/xray-core/proxy/vmess/encoding"
|
|
"github.com/xtls/xray-core/transport/internet/stat"
|
|
)
|
|
|
|
var (
|
|
aeadForced = false
|
|
aeadForced2022 = false
|
|
)
|
|
|
|
type userByEmail struct {
|
|
sync.Mutex
|
|
cache map[string]*protocol.MemoryUser
|
|
defaultLevel uint32
|
|
defaultAlterIDs uint16
|
|
}
|
|
|
|
func newUserByEmail(config *DefaultConfig) *userByEmail {
|
|
return &userByEmail{
|
|
cache: make(map[string]*protocol.MemoryUser),
|
|
defaultLevel: config.Level,
|
|
defaultAlterIDs: uint16(config.AlterId),
|
|
}
|
|
}
|
|
|
|
func (v *userByEmail) addNoLock(u *protocol.MemoryUser) bool {
|
|
email := strings.ToLower(u.Email)
|
|
_, found := v.cache[email]
|
|
if found {
|
|
return false
|
|
}
|
|
v.cache[email] = u
|
|
return true
|
|
}
|
|
|
|
func (v *userByEmail) Add(u *protocol.MemoryUser) bool {
|
|
v.Lock()
|
|
defer v.Unlock()
|
|
|
|
return v.addNoLock(u)
|
|
}
|
|
|
|
func (v *userByEmail) Get(email string) (*protocol.MemoryUser, bool) {
|
|
email = strings.ToLower(email)
|
|
|
|
v.Lock()
|
|
defer v.Unlock()
|
|
|
|
user, found := v.cache[email]
|
|
if !found {
|
|
id := uuid.New()
|
|
rawAccount := &vmess.Account{
|
|
Id: id.String(),
|
|
AlterId: uint32(v.defaultAlterIDs),
|
|
}
|
|
account, err := rawAccount.AsAccount()
|
|
common.Must(err)
|
|
user = &protocol.MemoryUser{
|
|
Level: v.defaultLevel,
|
|
Email: email,
|
|
Account: account,
|
|
}
|
|
v.cache[email] = user
|
|
}
|
|
return user, found
|
|
}
|
|
|
|
func (v *userByEmail) Remove(email string) bool {
|
|
email = strings.ToLower(email)
|
|
|
|
v.Lock()
|
|
defer v.Unlock()
|
|
|
|
if _, found := v.cache[email]; !found {
|
|
return false
|
|
}
|
|
delete(v.cache, email)
|
|
return true
|
|
}
|
|
|
|
// Handler is an inbound connection handler that handles messages in VMess protocol.
|
|
type Handler struct {
|
|
policyManager policy.Manager
|
|
inboundHandlerManager feature_inbound.Manager
|
|
clients *vmess.TimedUserValidator
|
|
usersByEmail *userByEmail
|
|
detours *DetourConfig
|
|
sessionHistory *encoding.SessionHistory
|
|
secure bool
|
|
}
|
|
|
|
// New creates a new VMess inbound handler.
|
|
func New(ctx context.Context, config *Config) (*Handler, error) {
|
|
v := core.MustFromContext(ctx)
|
|
handler := &Handler{
|
|
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
|
|
inboundHandlerManager: v.GetFeature(feature_inbound.ManagerType()).(feature_inbound.Manager),
|
|
clients: vmess.NewTimedUserValidator(protocol.DefaultIDHash),
|
|
detours: config.Detour,
|
|
usersByEmail: newUserByEmail(config.GetDefaultValue()),
|
|
sessionHistory: encoding.NewSessionHistory(),
|
|
secure: config.SecureEncryptionOnly,
|
|
}
|
|
|
|
for _, user := range config.User {
|
|
mUser, err := user.ToMemoryUser()
|
|
if err != nil {
|
|
return nil, newError("failed to get VMess user").Base(err)
|
|
}
|
|
|
|
if err := handler.AddUser(ctx, mUser); err != nil {
|
|
return nil, newError("failed to initiate user").Base(err)
|
|
}
|
|
}
|
|
|
|
return handler, nil
|
|
}
|
|
|
|
// Close implements common.Closable.
|
|
func (h *Handler) Close() error {
|
|
return errors.Combine(
|
|
h.clients.Close(),
|
|
h.sessionHistory.Close(),
|
|
common.Close(h.usersByEmail))
|
|
}
|
|
|
|
// Network implements proxy.Inbound.Network().
|
|
func (*Handler) Network() []net.Network {
|
|
return []net.Network{net.Network_TCP, net.Network_UNIX}
|
|
}
|
|
|
|
func (h *Handler) GetUser(email string) *protocol.MemoryUser {
|
|
user, existing := h.usersByEmail.Get(email)
|
|
if !existing {
|
|
h.clients.Add(user)
|
|
}
|
|
return user
|
|
}
|
|
|
|
func (h *Handler) AddUser(ctx context.Context, user *protocol.MemoryUser) error {
|
|
if len(user.Email) > 0 && !h.usersByEmail.Add(user) {
|
|
return newError("User ", user.Email, " already exists.")
|
|
}
|
|
return h.clients.Add(user)
|
|
}
|
|
|
|
func (h *Handler) RemoveUser(ctx context.Context, email string) error {
|
|
if email == "" {
|
|
return newError("Email must not be empty.")
|
|
}
|
|
if !h.usersByEmail.Remove(email) {
|
|
return newError("User ", email, " not found.")
|
|
}
|
|
h.clients.Remove(email)
|
|
return nil
|
|
}
|
|
|
|
func transferResponse(timer signal.ActivityUpdater, session *encoding.ServerSession, request *protocol.RequestHeader, response *protocol.ResponseHeader, input buf.Reader, output *buf.BufferedWriter) error {
|
|
session.EncodeResponseHeader(response, output)
|
|
|
|
bodyWriter, err := session.EncodeResponseBody(request, output)
|
|
if err != nil {
|
|
return newError("failed to start decoding response").Base(err)
|
|
}
|
|
{
|
|
// Optimize for small response packet
|
|
data, err := input.ReadMultiBuffer()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := bodyWriter.WriteMultiBuffer(data); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := output.SetBuffered(false); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := buf.Copy(input, bodyWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return err
|
|
}
|
|
|
|
account := request.User.Account.(*vmess.MemoryAccount)
|
|
|
|
if request.Option.Has(protocol.RequestOptionChunkStream) && !account.NoTerminationSignal {
|
|
if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func isInsecureEncryption(s protocol.SecurityType) bool {
|
|
return s == protocol.SecurityType_NONE || s == protocol.SecurityType_LEGACY || s == protocol.SecurityType_UNKNOWN
|
|
}
|
|
|
|
// Process implements proxy.Inbound.Process().
|
|
func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
|
|
sessionPolicy := h.policyManager.ForLevel(0)
|
|
if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
|
|
return newError("unable to set read deadline").Base(err).AtWarning()
|
|
}
|
|
|
|
iConn := connection
|
|
if statConn, ok := iConn.(*stat.CounterConnection); ok {
|
|
iConn = statConn.Connection
|
|
}
|
|
_, isDrain := iConn.(*net.TCPConn)
|
|
if !isDrain {
|
|
_, isDrain = iConn.(*net.UnixConn)
|
|
}
|
|
|
|
reader := &buf.BufferedReader{Reader: buf.NewReader(connection)}
|
|
svrSession := encoding.NewServerSession(h.clients, h.sessionHistory)
|
|
svrSession.SetAEADForced(aeadForced)
|
|
request, err := svrSession.DecodeRequestHeader(reader, isDrain)
|
|
if err != nil {
|
|
if errors.Cause(err) != io.EOF {
|
|
log.Record(&log.AccessMessage{
|
|
From: connection.RemoteAddr(),
|
|
To: "",
|
|
Status: log.AccessRejected,
|
|
Reason: err,
|
|
})
|
|
err = newError("invalid request from ", connection.RemoteAddr()).Base(err).AtInfo()
|
|
}
|
|
return err
|
|
}
|
|
|
|
if h.secure && isInsecureEncryption(request.Security) {
|
|
log.Record(&log.AccessMessage{
|
|
From: connection.RemoteAddr(),
|
|
To: "",
|
|
Status: log.AccessRejected,
|
|
Reason: "Insecure encryption",
|
|
Email: request.User.Email,
|
|
})
|
|
return newError("client is using insecure encryption: ", request.Security)
|
|
}
|
|
|
|
if request.Command != protocol.RequestCommandMux {
|
|
ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
|
|
From: connection.RemoteAddr(),
|
|
To: request.Destination(),
|
|
Status: log.AccessAccepted,
|
|
Reason: "",
|
|
Email: request.User.Email,
|
|
})
|
|
}
|
|
|
|
newError("received request for ", request.Destination()).WriteToLog(session.ExportIDToError(ctx))
|
|
|
|
if err := connection.SetReadDeadline(time.Time{}); err != nil {
|
|
newError("unable to set back read deadline").Base(err).WriteToLog(session.ExportIDToError(ctx))
|
|
}
|
|
|
|
inbound := session.InboundFromContext(ctx)
|
|
if inbound == nil {
|
|
panic("no inbound metadata")
|
|
}
|
|
inbound.User = request.User
|
|
|
|
sessionPolicy = h.policyManager.ForLevel(request.User.Level)
|
|
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
|
|
|
|
ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
|
|
link, err := dispatcher.Dispatch(ctx, request.Destination())
|
|
if err != nil {
|
|
return newError("failed to dispatch request to ", request.Destination()).Base(err)
|
|
}
|
|
|
|
requestDone := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
|
|
|
|
bodyReader, err := svrSession.DecodeRequestBody(request, reader)
|
|
if err != nil {
|
|
return newError("failed to start decoding").Base(err)
|
|
}
|
|
if err := buf.Copy(bodyReader, link.Writer, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transfer request").Base(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
responseDone := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
|
|
|
|
writer := buf.NewBufferedWriter(buf.NewWriter(connection))
|
|
defer writer.Flush()
|
|
|
|
response := &protocol.ResponseHeader{
|
|
Command: h.generateCommand(ctx, request),
|
|
}
|
|
return transferResponse(timer, svrSession, request, response, link.Reader, writer)
|
|
}
|
|
|
|
requestDonePost := task.OnSuccess(requestDone, task.Close(link.Writer))
|
|
if err := task.Run(ctx, requestDonePost, responseDone); err != nil {
|
|
common.Interrupt(link.Reader)
|
|
common.Interrupt(link.Writer)
|
|
return newError("connection ends").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (h *Handler) generateCommand(ctx context.Context, request *protocol.RequestHeader) protocol.ResponseCommand {
|
|
if h.detours != nil {
|
|
tag := h.detours.To
|
|
if h.inboundHandlerManager != nil {
|
|
handler, err := h.inboundHandlerManager.GetHandler(ctx, tag)
|
|
if err != nil {
|
|
newError("failed to get detour handler: ", tag).Base(err).AtWarning().WriteToLog(session.ExportIDToError(ctx))
|
|
return nil
|
|
}
|
|
proxyHandler, port, availableMin := handler.GetRandomInboundProxy()
|
|
inboundHandler, ok := proxyHandler.(*Handler)
|
|
if ok && inboundHandler != nil {
|
|
if availableMin > 255 {
|
|
availableMin = 255
|
|
}
|
|
|
|
newError("pick detour handler for port ", port, " for ", availableMin, " minutes.").AtDebug().WriteToLog(session.ExportIDToError(ctx))
|
|
user := inboundHandler.GetUser(request.User.Email)
|
|
if user == nil {
|
|
return nil
|
|
}
|
|
account := user.Account.(*vmess.MemoryAccount)
|
|
return &protocol.CommandSwitchAccount{
|
|
Port: port,
|
|
ID: account.ID.UUID(),
|
|
AlterIds: uint16(len(account.AlterIDs)),
|
|
Level: user.Level,
|
|
ValidMin: byte(availableMin),
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
return New(ctx, config.(*Config))
|
|
}))
|
|
|
|
defaultFlagValue := "NOT_DEFINED_AT_ALL"
|
|
|
|
if time.Now().Year() >= 2022 {
|
|
defaultFlagValue = "true_by_default_2022"
|
|
}
|
|
|
|
isAeadForced := platform.NewEnvFlag("xray.vmess.aead.forced").GetValue(func() string { return defaultFlagValue })
|
|
aeadForced = (isAeadForced == "true")
|
|
|
|
if isAeadForced == "true_by_default_2022" {
|
|
aeadForced = true
|
|
aeadForced2022 = true
|
|
}
|
|
}
|