sing-box/outbound/vmess.go

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package outbound
import (
"context"
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"crypto/tls"
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"net"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/dialer"
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"github.com/sagernet/sing-box/common/mux"
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C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-box/transport/v2ray"
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"github.com/sagernet/sing-vmess"
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"github.com/sagernet/sing/common"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
var _ adapter.Outbound = (*VMess)(nil)
type VMess struct {
myOutboundAdapter
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dialer N.Dialer
client *vmess.Client
serverAddr M.Socksaddr
multiplexDialer N.Dialer
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tlsConfig *tls.Config
transport adapter.V2RayClientTransport
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}
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func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VMessOutboundOptions) (*VMess, error) {
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var clientOptions []vmess.ClientOption
if options.GlobalPadding {
clientOptions = append(clientOptions, vmess.ClientWithGlobalPadding())
}
if options.AuthenticatedLength {
clientOptions = append(clientOptions, vmess.ClientWithAuthenticatedLength())
}
client, err := vmess.NewClient(options.UUID, options.Security, options.AlterId, clientOptions...)
if err != nil {
return nil, err
}
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outbound := &VMess{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeVMess,
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network: options.Network.Build(),
router: router,
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logger: logger,
tag: tag,
},
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dialer: dialer.NewOutbound(router, options.OutboundDialerOptions),
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client: client,
serverAddr: options.ServerOptions.Build(),
}
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if options.TLS != nil {
outbound.tlsConfig, err = dialer.TLSConfig(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 {
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return nil, E.Cause(err, "create client transport: ", options.Transport.Type)
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}
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}
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outbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*vmessDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
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if err != nil {
return nil, err
}
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return outbound, nil
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}
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func (h *VMess) Close() error {
return common.Close(h.transport)
}
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func (h *VMess) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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if h.multiplexDialer == nil {
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound connection to ", destination)
case N.NetworkUDP:
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
}
return (*vmessDialer)(h).DialContext(ctx, network, destination)
} else {
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound multiplex connection to ", destination)
case N.NetworkUDP:
h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
}
return h.multiplexDialer.DialContext(ctx, network, destination)
}
}
func (h *VMess) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
if h.multiplexDialer == nil {
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
return (*vmessDialer)(h).ListenPacket(ctx, destination)
} else {
h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
return h.multiplexDialer.ListenPacket(ctx, destination)
}
}
func (h *VMess) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return NewEarlyConnection(ctx, h, conn, metadata)
}
func (h *VMess) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
return NewPacketConnection(ctx, h, conn, metadata)
}
type vmessDialer VMess
func (h *vmessDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
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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 = dialer.TLSClient(ctx, conn, h.tlsConfig)
}
}
if err != nil {
return nil, err
}
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switch N.NetworkName(network) {
case N.NetworkTCP:
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return h.client.DialEarlyConn(conn, destination), nil
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case N.NetworkUDP:
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return h.client.DialEarlyPacketConn(conn, destination), nil
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default:
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return nil, E.Extend(N.ErrUnknownNetwork, network)
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}
}
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func (h *vmessDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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conn, err := h.DialContext(ctx, N.NetworkUDP, destination)
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if err != nil {
return nil, err
}
return conn.(vmess.PacketConn), nil
}