Xray-core/common/singbridge/dialer.go
yuhan6665 017f53b5fc
Add session context outbounds as slice (#3356)
* Add session context outbounds as slice

slice is needed for dialer proxy where two outbounds work on top of each other
There are two sets of target addr for example
It also enable Xtls to correctly do splice copy by checking both outbounds are ready to do direct copy

* Fill outbound tag info

* Splice now checks capalibility from all outbounds

* Fix unit tests
2024-05-13 21:52:24 -04:00

65 lines
2 KiB
Go

package singbridge
import (
"context"
"os"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
"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/proxy"
"github.com/xtls/xray-core/transport"
"github.com/xtls/xray-core/transport/internet"
"github.com/xtls/xray-core/transport/pipe"
)
var _ N.Dialer = (*XrayDialer)(nil)
type XrayDialer struct {
internet.Dialer
}
func NewDialer(dialer internet.Dialer) *XrayDialer {
return &XrayDialer{dialer}
}
func (d *XrayDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
return d.Dialer.Dial(ctx, ToDestination(destination, ToNetwork(network)))
}
func (d *XrayDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
return nil, os.ErrInvalid
}
type XrayOutboundDialer struct {
outbound proxy.Outbound
dialer internet.Dialer
}
func NewOutboundDialer(outbound proxy.Outbound, dialer internet.Dialer) *XrayOutboundDialer {
return &XrayOutboundDialer{outbound, dialer}
}
func (d *XrayOutboundDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
outbounds := session.OutboundsFromContext(ctx)
if len(outbounds) == 0 {
outbounds = []*session.Outbound{{}}
ctx = session.ContextWithOutbounds(ctx, outbounds)
}
ob := outbounds[len(outbounds) - 1]
ob.Target = ToDestination(destination, ToNetwork(network))
opts := []pipe.Option{pipe.WithSizeLimit(64 * 1024)}
uplinkReader, uplinkWriter := pipe.New(opts...)
downlinkReader, downlinkWriter := pipe.New(opts...)
conn := cnc.NewConnection(cnc.ConnectionInputMulti(downlinkWriter), cnc.ConnectionOutputMulti(uplinkReader))
go d.outbound.Process(ctx, &transport.Link{Reader: downlinkReader, Writer: uplinkWriter}, d.dialer)
return conn, nil
}
func (d *XrayOutboundDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
return nil, os.ErrInvalid
}