123 lines
4.0 KiB
Go
123 lines
4.0 KiB
Go
package outbound
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import (
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"context"
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"net"
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"github.com/sagernet/sing-box/adapter"
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"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"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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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"
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N "github.com/sagernet/sing/common/network"
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"github.com/sagernet/sing/protocol/trojan"
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)
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var _ adapter.Outbound = (*Trojan)(nil)
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type Trojan struct {
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myOutboundAdapter
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dialer N.Dialer
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serverAddr M.Socksaddr
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key [56]byte
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multiplexDialer N.Dialer
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}
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func NewTrojan(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TrojanOutboundOptions) (*Trojan, error) {
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outbound := &Trojan{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeTrojan,
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network: options.Network.Build(),
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router: router,
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logger: logger,
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tag: tag,
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},
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serverAddr: options.ServerOptions.Build(),
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key: trojan.Key(options.Password),
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}
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var err error
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outbound.dialer, err = dialer.NewTLS(dialer.NewOutbound(router, options.OutboundDialerOptions), options.Server, common.PtrValueOrDefault(options.TLSOptions))
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if err != nil {
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return nil, err
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}
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outbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*TrojanDialer)(outbound), common.PtrValueOrDefault(options.MultiplexOptions))
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if err != nil {
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return nil, err
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}
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return outbound, nil
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}
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func (h *Trojan) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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if h.multiplexDialer == nil {
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switch N.NetworkName(network) {
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case N.NetworkTCP:
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h.logger.InfoContext(ctx, "outbound connection to ", destination)
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case N.NetworkUDP:
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h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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}
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return (*TrojanDialer)(h).DialContext(ctx, network, destination)
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} else {
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switch N.NetworkName(network) {
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case N.NetworkTCP:
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h.logger.InfoContext(ctx, "outbound multiplex connection to ", destination)
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case N.NetworkUDP:
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h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
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}
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return h.multiplexDialer.DialContext(ctx, network, destination)
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}
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}
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func (h *Trojan) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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if h.multiplexDialer == nil {
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h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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return (*TrojanDialer)(h).ListenPacket(ctx, destination)
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} else {
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h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
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return h.multiplexDialer.ListenPacket(ctx, destination)
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}
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}
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func (h *Trojan) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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return NewEarlyConnection(ctx, h, conn, metadata)
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}
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func (h *Trojan) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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return NewPacketConnection(ctx, h, conn, metadata)
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}
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type TrojanDialer Trojan
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func (h *TrojanDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
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metadata.Outbound = h.tag
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metadata.Destination = destination
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switch N.NetworkName(network) {
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case N.NetworkTCP:
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outConn, err := h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
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if err != nil {
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return nil, err
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}
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return trojan.NewClientConn(outConn, h.key, destination), nil
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case N.NetworkUDP:
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outConn, err := h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
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if err != nil {
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return nil, err
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}
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return trojan.NewClientPacketConn(outConn, h.key), 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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}
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func (h *TrojanDialer) 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 {
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return nil, err
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}
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return conn.(*trojan.ClientPacketConn), nil
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}
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