mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-27 07:59:47 +00:00
339 lines
9.9 KiB
Go
339 lines
9.9 KiB
Go
package outbound
|
|
|
|
import (
|
|
"context"
|
|
"crypto/rand"
|
|
goerrors "errors"
|
|
"io"
|
|
"math/big"
|
|
gonet "net"
|
|
"os"
|
|
|
|
"github.com/xtls/xray-core/app/proxyman"
|
|
"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/mux"
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/net/cnc"
|
|
"github.com/xtls/xray-core/common/session"
|
|
"github.com/xtls/xray-core/core"
|
|
"github.com/xtls/xray-core/features/outbound"
|
|
"github.com/xtls/xray-core/features/policy"
|
|
"github.com/xtls/xray-core/features/stats"
|
|
"github.com/xtls/xray-core/proxy"
|
|
"github.com/xtls/xray-core/transport"
|
|
"github.com/xtls/xray-core/transport/internet"
|
|
"github.com/xtls/xray-core/transport/internet/stat"
|
|
"github.com/xtls/xray-core/transport/internet/tls"
|
|
"github.com/xtls/xray-core/transport/pipe"
|
|
)
|
|
|
|
func getStatCounter(v *core.Instance, tag string) (stats.Counter, stats.Counter) {
|
|
var uplinkCounter stats.Counter
|
|
var downlinkCounter stats.Counter
|
|
|
|
policy := v.GetFeature(policy.ManagerType()).(policy.Manager)
|
|
if len(tag) > 0 && policy.ForSystem().Stats.OutboundUplink {
|
|
statsManager := v.GetFeature(stats.ManagerType()).(stats.Manager)
|
|
name := "outbound>>>" + tag + ">>>traffic>>>uplink"
|
|
c, _ := stats.GetOrRegisterCounter(statsManager, name)
|
|
if c != nil {
|
|
uplinkCounter = c
|
|
}
|
|
}
|
|
if len(tag) > 0 && policy.ForSystem().Stats.OutboundDownlink {
|
|
statsManager := v.GetFeature(stats.ManagerType()).(stats.Manager)
|
|
name := "outbound>>>" + tag + ">>>traffic>>>downlink"
|
|
c, _ := stats.GetOrRegisterCounter(statsManager, name)
|
|
if c != nil {
|
|
downlinkCounter = c
|
|
}
|
|
}
|
|
|
|
return uplinkCounter, downlinkCounter
|
|
}
|
|
|
|
// Handler implements outbound.Handler.
|
|
type Handler struct {
|
|
tag string
|
|
senderSettings *proxyman.SenderConfig
|
|
streamSettings *internet.MemoryStreamConfig
|
|
proxy proxy.Outbound
|
|
outboundManager outbound.Manager
|
|
mux *mux.ClientManager
|
|
xudp *mux.ClientManager
|
|
udp443 string
|
|
uplinkCounter stats.Counter
|
|
downlinkCounter stats.Counter
|
|
}
|
|
|
|
// NewHandler creates a new Handler based on the given configuration.
|
|
func NewHandler(ctx context.Context, config *core.OutboundHandlerConfig) (outbound.Handler, error) {
|
|
v := core.MustFromContext(ctx)
|
|
uplinkCounter, downlinkCounter := getStatCounter(v, config.Tag)
|
|
h := &Handler{
|
|
tag: config.Tag,
|
|
outboundManager: v.GetFeature(outbound.ManagerType()).(outbound.Manager),
|
|
uplinkCounter: uplinkCounter,
|
|
downlinkCounter: downlinkCounter,
|
|
}
|
|
|
|
if config.SenderSettings != nil {
|
|
senderSettings, err := config.SenderSettings.GetInstance()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch s := senderSettings.(type) {
|
|
case *proxyman.SenderConfig:
|
|
h.senderSettings = s
|
|
mss, err := internet.ToMemoryStreamConfig(s.StreamSettings)
|
|
if err != nil {
|
|
return nil, errors.New("failed to parse stream settings").Base(err).AtWarning()
|
|
}
|
|
h.streamSettings = mss
|
|
default:
|
|
return nil, errors.New("settings is not SenderConfig")
|
|
}
|
|
}
|
|
|
|
proxyConfig, err := config.ProxySettings.GetInstance()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rawProxyHandler, err := common.CreateObject(ctx, proxyConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
proxyHandler, ok := rawProxyHandler.(proxy.Outbound)
|
|
if !ok {
|
|
return nil, errors.New("not an outbound handler")
|
|
}
|
|
|
|
if h.senderSettings != nil && h.senderSettings.MultiplexSettings != nil {
|
|
if config := h.senderSettings.MultiplexSettings; config.Enabled {
|
|
if config.Concurrency < 0 {
|
|
h.mux = &mux.ClientManager{Enabled: false}
|
|
}
|
|
if config.Concurrency == 0 {
|
|
config.Concurrency = 8 // same as before
|
|
}
|
|
if config.Concurrency > 0 {
|
|
h.mux = &mux.ClientManager{
|
|
Enabled: true,
|
|
Picker: &mux.IncrementalWorkerPicker{
|
|
Factory: &mux.DialingWorkerFactory{
|
|
Proxy: proxyHandler,
|
|
Dialer: h,
|
|
Strategy: mux.ClientStrategy{
|
|
MaxConcurrency: uint32(config.Concurrency),
|
|
MaxConnection: 128,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
if config.XudpConcurrency < 0 {
|
|
h.xudp = &mux.ClientManager{Enabled: false}
|
|
}
|
|
if config.XudpConcurrency == 0 {
|
|
h.xudp = nil // same as before
|
|
}
|
|
if config.XudpConcurrency > 0 {
|
|
h.xudp = &mux.ClientManager{
|
|
Enabled: true,
|
|
Picker: &mux.IncrementalWorkerPicker{
|
|
Factory: &mux.DialingWorkerFactory{
|
|
Proxy: proxyHandler,
|
|
Dialer: h,
|
|
Strategy: mux.ClientStrategy{
|
|
MaxConcurrency: uint32(config.XudpConcurrency),
|
|
MaxConnection: 128,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
h.udp443 = config.XudpProxyUDP443
|
|
}
|
|
}
|
|
|
|
h.proxy = proxyHandler
|
|
return h, nil
|
|
}
|
|
|
|
// Tag implements outbound.Handler.
|
|
func (h *Handler) Tag() string {
|
|
return h.tag
|
|
}
|
|
|
|
// Dispatch implements proxy.Outbound.Dispatch.
|
|
func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ob := outbounds[len(outbounds)-1]
|
|
if ob.Target.Network == net.Network_UDP && ob.OriginalTarget.Address != nil && ob.OriginalTarget.Address != ob.Target.Address {
|
|
link.Reader = &buf.EndpointOverrideReader{Reader: link.Reader, Dest: ob.Target.Address, OriginalDest: ob.OriginalTarget.Address}
|
|
link.Writer = &buf.EndpointOverrideWriter{Writer: link.Writer, Dest: ob.Target.Address, OriginalDest: ob.OriginalTarget.Address}
|
|
}
|
|
if h.mux != nil {
|
|
test := func(err error) {
|
|
if err != nil {
|
|
err := errors.New("failed to process mux outbound traffic").Base(err)
|
|
session.SubmitOutboundErrorToOriginator(ctx, err)
|
|
errors.LogInfo(ctx, err.Error())
|
|
common.Interrupt(link.Writer)
|
|
}
|
|
}
|
|
if ob.Target.Network == net.Network_UDP && ob.Target.Port == 443 {
|
|
switch h.udp443 {
|
|
case "reject":
|
|
test(errors.New("XUDP rejected UDP/443 traffic").AtInfo())
|
|
return
|
|
case "skip":
|
|
goto out
|
|
}
|
|
}
|
|
if h.xudp != nil && ob.Target.Network == net.Network_UDP {
|
|
if !h.xudp.Enabled {
|
|
goto out
|
|
}
|
|
test(h.xudp.Dispatch(ctx, link))
|
|
return
|
|
}
|
|
if h.mux.Enabled {
|
|
test(h.mux.Dispatch(ctx, link))
|
|
return
|
|
}
|
|
}
|
|
out:
|
|
err := h.proxy.Process(ctx, link, h)
|
|
if err != nil {
|
|
if goerrors.Is(err, io.EOF) || goerrors.Is(err, io.ErrClosedPipe) || goerrors.Is(err, context.Canceled) {
|
|
err = nil
|
|
}
|
|
}
|
|
if err != nil {
|
|
// Ensure outbound ray is properly closed.
|
|
err := errors.New("failed to process outbound traffic").Base(err)
|
|
session.SubmitOutboundErrorToOriginator(ctx, err)
|
|
errors.LogInfo(ctx, err.Error())
|
|
common.Interrupt(link.Writer)
|
|
} else {
|
|
common.Close(link.Writer)
|
|
}
|
|
common.Interrupt(link.Reader)
|
|
}
|
|
|
|
// Address implements internet.Dialer.
|
|
func (h *Handler) Address() net.Address {
|
|
if h.senderSettings == nil || h.senderSettings.Via == nil {
|
|
return nil
|
|
}
|
|
return h.senderSettings.Via.AsAddress()
|
|
}
|
|
|
|
func (h *Handler) DestIpAddress() net.IP {
|
|
return internet.DestIpAddress()
|
|
}
|
|
|
|
// Dial implements internet.Dialer.
|
|
func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connection, error) {
|
|
if h.senderSettings != nil {
|
|
if h.senderSettings.ProxySettings.HasTag() {
|
|
tag := h.senderSettings.ProxySettings.Tag
|
|
handler := h.outboundManager.GetHandler(tag)
|
|
if handler != nil {
|
|
errors.LogDebug(ctx, "proxying to ", tag, " for dest ", dest)
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ctx = session.ContextWithOutbounds(ctx, append(outbounds, &session.Outbound{
|
|
Target: dest,
|
|
Tag: tag,
|
|
})) // add another outbound in session ctx
|
|
opts := pipe.OptionsFromContext(ctx)
|
|
uplinkReader, uplinkWriter := pipe.New(opts...)
|
|
downlinkReader, downlinkWriter := pipe.New(opts...)
|
|
|
|
go handler.Dispatch(ctx, &transport.Link{Reader: uplinkReader, Writer: downlinkWriter})
|
|
conn := cnc.NewConnection(cnc.ConnectionInputMulti(uplinkWriter), cnc.ConnectionOutputMulti(downlinkReader))
|
|
|
|
if config := tls.ConfigFromStreamSettings(h.streamSettings); config != nil {
|
|
tlsConfig := config.GetTLSConfig(tls.WithDestination(dest))
|
|
conn = tls.Client(conn, tlsConfig)
|
|
}
|
|
|
|
return h.getStatCouterConnection(conn), nil
|
|
}
|
|
|
|
errors.LogWarning(ctx, "failed to get outbound handler with tag: ", tag)
|
|
}
|
|
|
|
if h.senderSettings.Via != nil {
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ob := outbounds[len(outbounds)-1]
|
|
if h.senderSettings.ViaCidr == "" {
|
|
ob.Gateway = h.senderSettings.Via.AsAddress()
|
|
} else { //Get a random address.
|
|
ob.Gateway = ParseRandomIPv6(h.senderSettings.Via.AsAddress(), h.senderSettings.ViaCidr)
|
|
}
|
|
}
|
|
}
|
|
|
|
if conn, err := h.getUoTConnection(ctx, dest); err != os.ErrInvalid {
|
|
return conn, err
|
|
}
|
|
|
|
conn, err := internet.Dial(ctx, dest, h.streamSettings)
|
|
conn = h.getStatCouterConnection(conn)
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ob := outbounds[len(outbounds)-1]
|
|
ob.Conn = conn
|
|
return conn, err
|
|
}
|
|
|
|
func (h *Handler) getStatCouterConnection(conn stat.Connection) stat.Connection {
|
|
if h.uplinkCounter != nil || h.downlinkCounter != nil {
|
|
return &stat.CounterConnection{
|
|
Connection: conn,
|
|
ReadCounter: h.downlinkCounter,
|
|
WriteCounter: h.uplinkCounter,
|
|
}
|
|
}
|
|
return conn
|
|
}
|
|
|
|
// GetOutbound implements proxy.GetOutbound.
|
|
func (h *Handler) GetOutbound() proxy.Outbound {
|
|
return h.proxy
|
|
}
|
|
|
|
// Start implements common.Runnable.
|
|
func (h *Handler) Start() error {
|
|
return nil
|
|
}
|
|
|
|
// Close implements common.Closable.
|
|
func (h *Handler) Close() error {
|
|
common.Close(h.mux)
|
|
return nil
|
|
}
|
|
|
|
func ParseRandomIPv6(address net.Address, prefix string) net.Address {
|
|
_, network, _ := gonet.ParseCIDR(address.IP().String() + "/" + prefix)
|
|
|
|
maskSize, totalBits := network.Mask.Size()
|
|
subnetSize := big.NewInt(1).Lsh(big.NewInt(1), uint(totalBits-maskSize))
|
|
|
|
// random
|
|
randomBigInt, _ := rand.Int(rand.Reader, subnetSize)
|
|
|
|
startIPBigInt := big.NewInt(0).SetBytes(network.IP.To16())
|
|
randomIPBigInt := big.NewInt(0).Add(startIPBigInt, randomBigInt)
|
|
|
|
randomIPBytes := randomIPBigInt.Bytes()
|
|
randomIPBytes = append(make([]byte, 16-len(randomIPBytes)), randomIPBytes...)
|
|
|
|
return net.ParseAddress(gonet.IP(randomIPBytes).String())
|
|
}
|