Add call protocol, Rmux. Update AmneziaWG. Fixes and improvements

protocol/call/outbound.go

@@ -0,0 +1,134 @@
+package call
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	"github.com/sagernet/sing-box/common/dialer"
+	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/call"
+	"github.com/sagernet/sing/common/bufio"
+	"github.com/sagernet/sing/common/bufio/deadline"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterOutbound(registry *outbound.Registry) {
+	outbound.Register[option.CallOutboundOptions](registry, C.TypeCall, NewOutbound)
+}
+
+type Outbound struct {
+	outbound.Adapter
+	ctx          context.Context
+	logger       logger.ContextLogger
+	options      option.CallOutboundOptions
+	dialer       N.Dialer
+	bridge       *call.Bridge
+	startHandler func()
+	await        chan struct{}
+}
+
+func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.CallOutboundOptions) (adapter.Outbound, error) {
+	if options.JoinLink == "" {
+		return nil, E.New("missing join_link")
+	}
+	if options.Platform == "" {
+		return nil, E.New("missing platform")
+	}
+	outboundDialer, err := dialer.New(ctx, options.DialerOptions, true)
+	if err != nil {
+		return nil, err
+	}
+	ob := &Outbound{
+		Adapter: outbound.NewAdapterWithDialerOptions(C.TypeCall, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.DialerOptions),
+		ctx:     ctx,
+		logger:  logger,
+		options: options,
+		dialer:  outboundDialer,
+		await:   make(chan struct{}),
+	}
+	dnsRouter := service.FromContext[adapter.DNSRouter](ctx)
+	ob.startHandler = func() {
+		defer close(ob.await)
+		bridge, err := call.Connect(ctx, call.Config{
+			Platform:     options.Platform,
+			Mode:         options.Mode,
+			JoinLink:     options.JoinLink,
+			CookieString: options.Cookies.Header(),
+			ReadBuffer:   options.ReadBuffer,
+			Role:         call.RoleJoiner,
+			Dialer:       outboundDialer,
+			DNSRouter:    dnsRouter,
+			Logger:       logger,
+		})
+		if err != nil {
+			logger.ErrorContext(ctx, err)
+			return
+		}
+		ob.bridge = bridge
+	}
+	return ob, nil
+}
+
+func (o *Outbound) Start(stage adapter.StartStage) error {
+	if stage != adapter.StartStatePostStart {
+		return nil
+	}
+	go o.startHandler()
+	return nil
+}
+
+func (o *Outbound) Close() error {
+	if o.bridge == nil {
+		return nil
+	}
+	return o.bridge.Close()
+}
+
+func (o *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	if err := o.awaitBridge(ctx); err != nil {
+		return nil, err
+	}
+	switch N.NetworkName(network) {
+	case N.NetworkTCP:
+		o.logger.InfoContext(ctx, "outbound connection to ", destination)
+		conn, err := o.bridge.DialContext(ctx, destination.String())
+		if err != nil {
+			return nil, err
+		}
+		return deadline.NewConn(conn), nil
+	default:
+		return nil, E.New("call: unsupported network: ", network)
+	}
+}
+
+func (o *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	if err := o.awaitBridge(ctx); err != nil {
+		return nil, err
+	}
+	o.logger.InfoContext(ctx, "outbound packet connection to ", destination)
+	conn, err := o.bridge.ListenPacket(ctx, destination.String())
+	if err != nil {
+		return nil, err
+	}
+	return bufio.NewUnbindPacketConnWithAddr(conn, destination), nil
+}
+
+func (o *Outbound) awaitBridge(ctx context.Context) error {
+	select {
+	case <-o.await:
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+	if o.bridge == nil {
+		return E.New("call: tunnel not initialized")
+	}
+	return nil
+}