mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-12 06:54:23 -04:00
166 lines
5.3 KiB
Go
166 lines
5.3 KiB
Go
package outbound
|
|
|
|
//go:generate go run github.com/v2fly/v2ray-core/v4/common/errors/errorgen
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
|
|
core "github.com/v2fly/v2ray-core/v4"
|
|
"github.com/v2fly/v2ray-core/v4/common"
|
|
"github.com/v2fly/v2ray-core/v4/common/buf"
|
|
"github.com/v2fly/v2ray-core/v4/common/net"
|
|
"github.com/v2fly/v2ray-core/v4/common/protocol"
|
|
"github.com/v2fly/v2ray-core/v4/common/retry"
|
|
"github.com/v2fly/v2ray-core/v4/common/session"
|
|
"github.com/v2fly/v2ray-core/v4/common/signal"
|
|
"github.com/v2fly/v2ray-core/v4/common/task"
|
|
"github.com/v2fly/v2ray-core/v4/features/policy"
|
|
"github.com/v2fly/v2ray-core/v4/proxy/vless"
|
|
"github.com/v2fly/v2ray-core/v4/proxy/vless/encoding"
|
|
"github.com/v2fly/v2ray-core/v4/transport"
|
|
"github.com/v2fly/v2ray-core/v4/transport/internet"
|
|
)
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
return New(ctx, config.(*Config))
|
|
}))
|
|
}
|
|
|
|
// Handler is an outbound connection handler for VLess protocol.
|
|
type Handler struct {
|
|
serverList *protocol.ServerList
|
|
serverPicker protocol.ServerPicker
|
|
policyManager policy.Manager
|
|
}
|
|
|
|
// New creates a new VLess outbound handler.
|
|
func New(ctx context.Context, config *Config) (*Handler, error) {
|
|
serverList := protocol.NewServerList()
|
|
for _, rec := range config.Vnext {
|
|
s, err := protocol.NewServerSpecFromPB(rec)
|
|
if err != nil {
|
|
return nil, newError("failed to parse server spec").Base(err).AtError()
|
|
}
|
|
serverList.AddServer(s)
|
|
}
|
|
|
|
v := core.MustFromContext(ctx)
|
|
handler := &Handler{
|
|
serverList: serverList,
|
|
serverPicker: protocol.NewRoundRobinServerPicker(serverList),
|
|
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
|
|
}
|
|
|
|
return handler, nil
|
|
}
|
|
|
|
// Process implements proxy.Outbound.Process().
|
|
func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
|
|
var rec *protocol.ServerSpec
|
|
var conn internet.Connection
|
|
|
|
if err := retry.ExponentialBackoff(5, 200).On(func() error {
|
|
rec = h.serverPicker.PickServer()
|
|
var err error
|
|
conn, err = dialer.Dial(ctx, rec.Destination())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
return newError("failed to find an available destination").Base(err).AtWarning()
|
|
}
|
|
defer conn.Close()
|
|
|
|
outbound := session.OutboundFromContext(ctx)
|
|
if outbound == nil || !outbound.Target.IsValid() {
|
|
return newError("target not specified").AtError()
|
|
}
|
|
|
|
target := outbound.Target
|
|
newError("tunneling request to ", target, " via ", rec.Destination()).AtInfo().WriteToLog(session.ExportIDToError(ctx))
|
|
|
|
command := protocol.RequestCommandTCP
|
|
if target.Network == net.Network_UDP {
|
|
command = protocol.RequestCommandUDP
|
|
}
|
|
if target.Address.Family().IsDomain() && target.Address.Domain() == "v1.mux.cool" {
|
|
command = protocol.RequestCommandMux
|
|
}
|
|
|
|
request := &protocol.RequestHeader{
|
|
Version: encoding.Version,
|
|
User: rec.PickUser(),
|
|
Command: command,
|
|
Address: target.Address,
|
|
Port: target.Port,
|
|
}
|
|
|
|
account := request.User.Account.(*vless.MemoryAccount)
|
|
|
|
requestAddons := &encoding.Addons{
|
|
Flow: account.Flow,
|
|
}
|
|
|
|
sessionPolicy := h.policyManager.ForLevel(request.User.Level)
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
|
|
|
|
clientReader := link.Reader // .(*pipe.Reader)
|
|
clientWriter := link.Writer // .(*pipe.Writer)
|
|
|
|
postRequest := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
|
|
|
|
bufferWriter := buf.NewBufferedWriter(buf.NewWriter(conn))
|
|
if err := encoding.EncodeRequestHeader(bufferWriter, request, requestAddons); err != nil {
|
|
return newError("failed to encode request header").Base(err).AtWarning()
|
|
}
|
|
|
|
// default: serverWriter := bufferWriter
|
|
serverWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons)
|
|
if err := buf.CopyOnceTimeout(clientReader, serverWriter, time.Millisecond*100); err != nil && err != buf.ErrNotTimeoutReader && err != buf.ErrReadTimeout {
|
|
return err // ...
|
|
}
|
|
|
|
// Flush; bufferWriter.WriteMultiBufer now is bufferWriter.writer.WriteMultiBuffer
|
|
if err := bufferWriter.SetBuffered(false); err != nil {
|
|
return newError("failed to write A request payload").Base(err).AtWarning()
|
|
}
|
|
|
|
// from clientReader.ReadMultiBuffer to serverWriter.WriteMultiBufer
|
|
if err := buf.Copy(clientReader, serverWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transfer request payload").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
getResponse := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
|
|
|
|
responseAddons, err := encoding.DecodeResponseHeader(conn, request)
|
|
if err != nil {
|
|
return newError("failed to decode response header").Base(err).AtInfo()
|
|
}
|
|
|
|
// default: serverReader := buf.NewReader(conn)
|
|
serverReader := encoding.DecodeBodyAddons(conn, request, responseAddons)
|
|
|
|
// from serverReader.ReadMultiBuffer to clientWriter.WriteMultiBufer
|
|
if err := buf.Copy(serverReader, clientWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transfer response payload").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
if err := task.Run(ctx, postRequest, task.OnSuccess(getResponse, task.Close(clientWriter))); err != nil {
|
|
return newError("connection ends").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|