sing-box/outbound/vless.go

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package outbound
import (
"context"
"net"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/dialer"
"github.com/sagernet/sing-box/common/tls"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2ray"
"github.com/sagernet/sing-box/transport/vless"
"github.com/sagernet/sing-dns"
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"github.com/sagernet/sing-vmess/packetaddr"
"github.com/sagernet/sing/common"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
var _ adapter.Outbound = (*VLESS)(nil)
type VLESS struct {
myOutboundAdapter
dialer N.Dialer
client *vless.Client
serverAddr M.Socksaddr
tlsConfig tls.Config
transport adapter.V2RayClientTransport
packetAddr bool
xudp bool
}
func NewVLESS(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VLESSOutboundOptions) (*VLESS, error) {
outbound := &VLESS{
myOutboundAdapter: myOutboundAdapter{
protocol: C.TypeVLESS,
network: options.Network.Build(),
router: router,
logger: logger,
tag: tag,
},
dialer: dialer.New(router, options.DialerOptions),
serverAddr: options.ServerOptions.Build(),
}
var err error
if options.TLS != nil {
outbound.tlsConfig, err = tls.NewClient(router, options.Server, common.PtrValueOrDefault(options.TLS))
if err != nil {
return nil, err
}
}
if options.Transport != nil {
outbound.transport, err = v2ray.NewClientTransport(ctx, outbound.dialer, outbound.serverAddr, common.PtrValueOrDefault(options.Transport), outbound.tlsConfig)
if err != nil {
return nil, E.Cause(err, "create client transport: ", options.Transport.Type)
}
}
switch options.PacketEncoding {
case "":
case "packetaddr":
outbound.packetAddr = true
case "xudp":
outbound.xudp = true
default:
return nil, E.New("unknown packet encoding: ", options.PacketEncoding)
}
outbound.client, err = vless.NewClient(options.UUID, options.Flow)
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if err != nil {
return nil, err
}
return outbound, nil
}
func (h *VLESS) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
var conn net.Conn
var err error
if h.transport != nil {
conn, err = h.transport.DialContext(ctx)
} else {
conn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
if err == nil && h.tlsConfig != nil {
conn, err = tls.ClientHandshake(ctx, conn, h.tlsConfig)
}
}
if err != nil {
return nil, err
}
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound connection to ", destination)
return h.client.DialEarlyConn(conn, destination)
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case N.NetworkUDP:
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
return h.client.DialEarlyPacketConn(conn, destination)
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default:
return nil, E.Extend(N.ErrUnknownNetwork, network)
}
}
func (h *VLESS) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
var conn net.Conn
var err error
if h.transport != nil {
conn, err = h.transport.DialContext(ctx)
} else {
conn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
if err == nil && h.tlsConfig != nil {
conn, err = tls.ClientHandshake(ctx, conn, h.tlsConfig)
}
}
if err != nil {
return nil, err
}
if h.xudp {
return h.client.DialEarlyXUDPPacketConn(conn, destination)
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} else if h.packetAddr {
conn, err := h.client.DialEarlyPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress})
if err != nil {
return nil, err
}
return dialer.NewResolvePacketConn(ctx, h.router, dns.DomainStrategyAsIS, packetaddr.NewConn(conn, destination)), nil
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} else {
return h.client.DialEarlyPacketConn(conn, destination)
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}
}
func (h *VLESS) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return NewEarlyConnection(ctx, h, conn, metadata)
}
func (h *VLESS) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
return NewPacketConnection(ctx, h, conn, metadata)
}
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func (h *VLESS) Close() error {
return common.Close(h.transport)
}