sdk/lib/driver/metadata/cpp/metadata.cc

// Copyright 2024 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <lib/driver/metadata/cpp/metadata.h>

namespace fdf_metadata {
zx::result<fidl::ClientEnd<fuchsia_driver_metadata::Metadata>> ConnectToMetadataProtocol(
    fidl::UnownedClientEnd<fuchsia_io::Directory> svc_dir, std::string_view service_name,
    std::string_view instance_name) {
  // The metadata protocol is found within the `service_name` service directory and not the
  // `fuchsia_driver_metadata::Service::Name` directory because that is where
  // `fdf_metadata::MetadataServer` is expected to serve the fuchsia.driver.metadata/Metadata'
  // protocol.
  auto path = std::string{service_name}
                  .append("/")
                  .append(instance_name)
                  .append("/")
                  .append(fuchsia_driver_metadata::Service::Metadata::Name);

  zx::result result = component::ConnectAt<fuchsia_driver_metadata::Metadata>(svc_dir, path);
  if (result.is_error()) {
    fdf::error("Failed to connect to metadata protocol at path {}: {}", path, result);
    return result.take_error();
  }

  return zx::ok(std::move(result.value()));
}
}  // namespace fdf_metadata