Add api command

cmd/sing-box/cmd_api_openconnect.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"io"
+
+	"github.com/sagernet/sing-box/daemon"
+	E "github.com/sagernet/sing/common/exceptions"
+	F "github.com/sagernet/sing/common/format"
+
+	"github.com/spf13/cobra"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+var commandAPIOpenConnect = &cobra.Command{
+	Use:   "openconnect",
+	Short: "Manage OpenConnect authentication",
+}
+
+func init() {
+	commandAPIRoot.AddCommand(commandAPIOpenConnect)
+}
+
+func subscribeOpenConnectStatus(ctx context.Context, client daemon.StartedServiceClient) (grpc.ServerStreamingClient[daemon.OpenConnectStatusUpdate], []*daemon.OpenConnectEndpointStatus, error) {
+	stream, err := client.SubscribeOpenConnectStatus(ctx, &emptypb.Empty{})
+	if err != nil {
+		return nil, nil, err
+	}
+	endpoints, err := recvOpenConnectStatus(stream)
+	if err != nil {
+		return nil, nil, err
+	}
+	return stream, endpoints, nil
+}
+
+func recvOpenConnectStatus(stream grpc.ServerStreamingClient[daemon.OpenConnectStatusUpdate]) ([]*daemon.OpenConnectEndpointStatus, error) {
+	update, err := stream.Recv()
+	if err != nil {
+		if errors.Is(err, io.EOF) {
+			return nil, E.New("api service closed the status stream")
+		}
+		return nil, err
+	}
+	return update.GetEndpoints(), nil
+}
+
+func openConnectChallengeSummary(challenge *daemon.OpenConnectAuthChallenge) string {
+	form := challenge.GetForm()
+	if form != nil {
+		return F.ToString("form (", len(form.GetFields()), " fields)")
+	}
+	browser := challenge.GetBrowser()
+	if browser == nil {
+		return "unknown"
+	}
+	mode, err := deriveOpenConnectBrowserMode(browser)
+	if err != nil {
+		return "browser (invalid)"
+	}
+	return "browser (" + mode + ")"
+}