mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-23 20:03:32 +02:00
079d0bd8a9
* Refactor log * Add new log methods * Fix logger test * Change all logging code * Clean up pathObj * Rebase to latest main * Remove invoking method name after the dot
124 lines
3.2 KiB
Go
124 lines
3.2 KiB
Go
package loopback
|
|
|
|
import (
|
|
"context"
|
|
|
|
"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/net"
|
|
"github.com/xtls/xray-core/common/net/cnc"
|
|
"github.com/xtls/xray-core/common/retry"
|
|
"github.com/xtls/xray-core/common/session"
|
|
"github.com/xtls/xray-core/common/task"
|
|
"github.com/xtls/xray-core/core"
|
|
"github.com/xtls/xray-core/features/routing"
|
|
"github.com/xtls/xray-core/transport"
|
|
"github.com/xtls/xray-core/transport/internet"
|
|
)
|
|
|
|
type Loopback struct {
|
|
config *Config
|
|
dispatcherInstance routing.Dispatcher
|
|
}
|
|
|
|
func (l *Loopback) Process(ctx context.Context, link *transport.Link, _ internet.Dialer) error {
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ob := outbounds[len(outbounds)-1]
|
|
if !ob.Target.IsValid() {
|
|
return errors.New("target not specified.")
|
|
}
|
|
ob.Name = "loopback"
|
|
destination := ob.Target
|
|
|
|
errors.LogInfo(ctx, "opening connection to ", destination)
|
|
|
|
input := link.Reader
|
|
output := link.Writer
|
|
|
|
var conn net.Conn
|
|
err := retry.ExponentialBackoff(2, 100).On(func() error {
|
|
dialDest := destination
|
|
|
|
content := new(session.Content)
|
|
content.SkipDNSResolve = true
|
|
|
|
ctx = session.ContextWithContent(ctx, content)
|
|
|
|
inbound := session.InboundFromContext(ctx)
|
|
|
|
inbound.Tag = l.config.InboundTag
|
|
|
|
ctx = session.ContextWithInbound(ctx, inbound)
|
|
|
|
rawConn, err := l.dispatcherInstance.Dispatch(ctx, dialDest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var readerOpt cnc.ConnectionOption
|
|
if dialDest.Network == net.Network_TCP {
|
|
readerOpt = cnc.ConnectionOutputMulti(rawConn.Reader)
|
|
} else {
|
|
readerOpt = cnc.ConnectionOutputMultiUDP(rawConn.Reader)
|
|
}
|
|
|
|
conn = cnc.NewConnection(cnc.ConnectionInputMulti(rawConn.Writer), readerOpt)
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return errors.New("failed to open connection to ", destination).Base(err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
requestDone := func() error {
|
|
var writer buf.Writer
|
|
if destination.Network == net.Network_TCP {
|
|
writer = buf.NewWriter(conn)
|
|
} else {
|
|
writer = &buf.SequentialWriter{Writer: conn}
|
|
}
|
|
|
|
if err := buf.Copy(input, writer); err != nil {
|
|
return errors.New("failed to process request").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
responseDone := func() error {
|
|
var reader buf.Reader
|
|
if destination.Network == net.Network_TCP {
|
|
reader = buf.NewReader(conn)
|
|
} else {
|
|
reader = buf.NewPacketReader(conn)
|
|
}
|
|
if err := buf.Copy(reader, output); err != nil {
|
|
return errors.New("failed to process response").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
if err := task.Run(ctx, requestDone, task.OnSuccess(responseDone, task.Close(output))); err != nil {
|
|
return errors.New("connection ends").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (l *Loopback) init(config *Config, dispatcherInstance routing.Dispatcher) error {
|
|
l.dispatcherInstance = dispatcherInstance
|
|
l.config = config
|
|
return nil
|
|
}
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
l := new(Loopback)
|
|
err := core.RequireFeatures(ctx, func(dispatcherInstance routing.Dispatcher) error {
|
|
return l.init(config.(*Config), dispatcherInstance)
|
|
})
|
|
return l, err
|
|
}))
|
|
}
|