/* Copyright 2017 The ChromiumOS Authors

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#include <fuzzer/FuzzedDataProvider.h>

#include <stddef.h>

#include <stdint.h>

#include "cras/common/check.h"

#include "cras/src/server/cras_bt_log.h"

#include "cras/src/server/cras_dsp.h"

#include "cras/src/server/cras_iodev_list.h"

#include "cras/src/server/cras_mix.h"

#include "cras/src/server/cras_observer.h"

#include "cras/src/server/cras_rclient.h"

#include "cras/src/server/cras_stream_apm.h"

#include "cras/src/server/cras_system_state.h"

#include "cras_shm.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

  cras_rclient* client = cras_rclient_create(0, 0, CRAS_CONTROL);

  if (size < 300) {

    // Feeds input data directly if the given bytes is too short.

    cras_rclient_buffer_from_client(client, data, size, NULL, 0);

  } else {

    FuzzedDataProvider data_provider(data, size);

    int fds[1] = {0};

    int num_fds = data_provider.ConsumeIntegralInRange(0, 1);

    std::vector<uint8_t> msg = data_provider.ConsumeRemainingBytes<uint8_t>();

    cras_rclient_buffer_from_client(client, msg.data(), msg.size(), fds,

                                    num_fds);

  }

  cras_rclient_destroy(client);

  return 0;

}

extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {

  char* shm_name;

  if (asprintf(&shm_name, "/cras-%d", getpid()) < 0) {

    exit(-ENOMEM);

  }

  struct cras_server_state* exp_state =

      (struct cras_server_state*)calloc(1, sizeof(*exp_state));

  if (!exp_state) {

    exit(-1);

  }

  int rw_shm_fd = open("/dev/null", O_RDWR);

  int ro_shm_fd = open("/dev/null", O_RDONLY);

  cras_system_state_init("/tmp", shm_name, rw_shm_fd, ro_shm_fd, exp_state,

                         sizeof(*exp_state));

  free(shm_name);

  cras_observer_server_init();

  cras_mix_init();

  cras_stream_apm_init("/etc/cras");

  cras_iodev_list_init();

  /* For cros fuzz, emerge adhd with USE=fuzzer will copy dsp.ini.sample to

   * etc/cras. For OSS-Fuzz the Dockerfile will be responsible for copying the

   * file. This shouldn't crash CRAS even if the dsp file does not exist. */

  cras_dsp_init("/etc/cras/dsp.ini.sample");

  // Initializes btlog for CRAS_SERVER_DUMP_BT path with CRAS_DBUS defined.

  btlog = cras_bt_event_log_init();

  return 0;

}