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@@ -0,0 +1,122 @@
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+package outbound
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+
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+import (
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+ "context"
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+ "net"
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+
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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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+
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+var _ adapter.Outbound = (*Trojan)(nil)
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+
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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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+
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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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+ inbound := &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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+ inbound.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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+ inbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*TrojanDialer)(inbound), 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 inbound, nil
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+}
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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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+
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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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+
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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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+
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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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+
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+type TrojanDialer Trojan
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+
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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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+
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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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