refactor: Modular inbounds/outbounds

protocol/http/outbound.go

@@ -0,0 +1,65 @@
+package http
+
+import (
+	"context"
+	"net"
+	"os"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	"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/common"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	sHTTP "github.com/sagernet/sing/protocol/http"
+)
+
+func RegisterOutbound(registry *outbound.Registry) {
+	outbound.Register[option.HTTPOutboundOptions](registry, C.TypeHTTP, NewOutbound)
+}
+
+type Outbound struct {
+	outbound.Adapter
+	logger logger.ContextLogger
+	client *sHTTP.Client
+}
+
+func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.HTTPOutboundOptions) (adapter.Outbound, error) {
+	outboundDialer, err := dialer.New(router, options.DialerOptions)
+	if err != nil {
+		return nil, err
+	}
+	detour, err := tls.NewDialerFromOptions(ctx, router, outboundDialer, options.Server, common.PtrValueOrDefault(options.TLS))
+	if err != nil {
+		return nil, err
+	}
+	return &Outbound{
+		Adapter: outbound.NewAdapterWithDialerOptions(C.TypeHTTP, []string{N.NetworkTCP}, tag, options.DialerOptions),
+		logger:  logger,
+		client: sHTTP.NewClient(sHTTP.Options{
+			Dialer:   detour,
+			Server:   options.ServerOptions.Build(),
+			Username: options.Username,
+			Password: options.Password,
+			Path:     options.Path,
+			Headers:  options.Headers.Build(),
+		}),
+	}, nil
+}
+
+func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	ctx, metadata := adapter.ExtendContext(ctx)
+	metadata.Outbound = h.Tag()
+	metadata.Destination = destination
+	h.logger.InfoContext(ctx, "outbound connection to ", destination)
+	return h.client.DialContext(ctx, network, destination)
+}
+
+func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	return nil, os.ErrInvalid
+}