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/*
     This file is part of GNUnet.
     Copyright (C) 2005-2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Affero General Public License for more details.
    
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
*/

/**
 * @file fs/test_fs_namespace.c
 * @brief Test for fs_namespace.c
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_testing_lib.h"
#include "gnunet_fs_service.h"


static struct GNUNET_CRYPTO_EcdsaPublicKey nsid;

static struct GNUNET_FS_Uri *sks_expect_uri;

static struct GNUNET_FS_Uri *ksk_expect_uri;

static struct GNUNET_FS_Handle *fs;

static struct GNUNET_FS_SearchContext *sks_search;

static struct GNUNET_FS_SearchContext *ksk_search;

static struct GNUNET_SCHEDULER_Task * kill_task;

static int update_started;

static int err;


static void
abort_ksk_search_task (void *cls)
{
  if (ksk_search != NULL)
  {
    GNUNET_FS_search_stop (ksk_search);
    ksk_search = NULL;
    if (sks_search == NULL)
    {
      GNUNET_FS_stop (fs);
      if (NULL != kill_task)
        GNUNET_SCHEDULER_cancel (kill_task);
    }
  }
}


static void
abort_sks_search_task (void *cls)
{
  if (sks_search == NULL)
    return;
  GNUNET_FS_search_stop (sks_search);
  sks_search = NULL;
  if (ksk_search == NULL)
  {
    GNUNET_FS_stop (fs);
    if (NULL != kill_task)
      GNUNET_SCHEDULER_cancel (kill_task);
  }
}


static void
do_timeout (void *cls)
{
  err = 1;
  FPRINTF (stderr, "%s",  "Operation timed out\n");
  kill_task = NULL;
  abort_sks_search_task (NULL);
  abort_ksk_search_task (NULL);
}


static void *
progress_cb (void *cls, const struct GNUNET_FS_ProgressInfo *event)
{
  switch (event->status)
  {
  case GNUNET_FS_STATUS_SEARCH_RESULT:
    if (sks_search == event->value.search.sc)
    {
      if (!GNUNET_FS_uri_test_equal
          (sks_expect_uri, event->value.search.specifics.result.uri))
      {
        FPRINTF (stderr, "%s",  "Wrong result for sks search!\n");
        err = 1;
      }
      /* give system 1ms to initiate update search! */
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MILLISECONDS,
                                    &abort_sks_search_task, NULL);
    }
    else if (ksk_search == event->value.search.sc)
    {
      if (!GNUNET_FS_uri_test_equal
          (ksk_expect_uri, event->value.search.specifics.result.uri))
      {
        FPRINTF (stderr, "%s",  "Wrong result for ksk search!\n");
        err = 1;
      }
      GNUNET_SCHEDULER_add_now (&abort_ksk_search_task, NULL);
    }
    else
    {
      FPRINTF (stderr, "%s",  "Unexpected search result received!\n");
      GNUNET_break (0);
    }
    break;
  case GNUNET_FS_STATUS_SEARCH_ERROR:
    FPRINTF (stderr, "Error searching file: %s\n",
             event->value.search.specifics.error.message);
    if (sks_search == event->value.search.sc)
      GNUNET_SCHEDULER_add_now (&abort_sks_search_task, NULL);
    else if (ksk_search == event->value.search.sc)
      GNUNET_SCHEDULER_add_now (&abort_ksk_search_task, NULL);
    else
      GNUNET_break (0);
    break;
  case GNUNET_FS_STATUS_SEARCH_START:
    GNUNET_assert ((NULL == event->value.search.cctx) ||
                   (0 == strcmp ("sks_search", event->value.search.cctx)) ||
                   (0 == strcmp ("ksk_search", event->value.search.cctx)));
    if (NULL == event->value.search.cctx)
    {
      GNUNET_assert (0 == strcmp ("sks_search", event->value.search.pctx));
      update_started = GNUNET_YES;
    }
    GNUNET_assert (1 == event->value.search.anonymity);
    break;
  case GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED:
    return NULL;
  case GNUNET_FS_STATUS_SEARCH_STOPPED:
    return NULL;
  default:
    FPRINTF (stderr, "Unexpected event: %d\n", event->status);
    break;
  }
  return event->value.search.cctx;
}


static void
publish_cont (void *cls, const struct GNUNET_FS_Uri *ksk_uri, const char *emsg)
{
  char *msg;
  struct GNUNET_FS_Uri *sks_uri;
  char sbuf[1024];
  char buf[1024];
  char *ret;

  if (NULL != emsg)
  {
    FPRINTF (stderr, "Error publishing: %s\n", emsg);
    err = 1;
    GNUNET_FS_stop (fs);
    return;
  }
  ret = GNUNET_STRINGS_data_to_string (&nsid, sizeof (nsid), buf, sizeof (buf));
  GNUNET_assert (NULL != ret);
  ret[0] = '\0';
  GNUNET_snprintf (sbuf, sizeof (sbuf), "gnunet://fs/sks/%s/this", buf);
  sks_uri = GNUNET_FS_uri_parse (sbuf, &msg);
  if (NULL == sks_uri)
  {
    FPRINTF (stderr, "failed to parse URI `%s': %s\n", sbuf, msg);
    err = 1;
    GNUNET_FS_stop (fs);
    GNUNET_free_non_null (msg);
    return;
  }
  ksk_search =
      GNUNET_FS_search_start (fs, ksk_uri, 1, GNUNET_FS_SEARCH_OPTION_NONE,
                              "ksk_search");
  sks_search =
      GNUNET_FS_search_start (fs, sks_uri, 1, GNUNET_FS_SEARCH_OPTION_NONE,
                              "sks_search");
  GNUNET_FS_uri_destroy (sks_uri);
}


static void
sks_cont (void *cls, const struct GNUNET_FS_Uri *uri, const char *emsg)
{
  struct GNUNET_CONTAINER_MetaData *meta;
  struct GNUNET_FS_Uri *ksk_uri;
  char *msg;
  struct GNUNET_FS_BlockOptions bo;

  if (NULL == uri)
  {
    fprintf (stderr, "Error publishing: %s\n", emsg);
    err = 1;
    GNUNET_FS_stop (fs);
    return;
  }
  meta = GNUNET_CONTAINER_meta_data_create ();
  msg = NULL;
  ksk_uri = GNUNET_FS_uri_parse ("gnunet://fs/ksk/ns-search", &msg);
  GNUNET_assert (NULL == msg);
  ksk_expect_uri = GNUNET_FS_uri_dup (uri);
  bo.content_priority = 1;
  bo.anonymity_level = 1;
  bo.replication_level = 0;
  bo.expiration_time =
      GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_MINUTES);
  GNUNET_FS_publish_ksk (fs, ksk_uri, meta, uri, &bo,
                         GNUNET_FS_PUBLISH_OPTION_NONE, &publish_cont, NULL);
  GNUNET_FS_uri_destroy (ksk_uri);
  GNUNET_CONTAINER_meta_data_destroy (meta);
}


static void
adv_cont (void *cls, const struct GNUNET_FS_Uri *uri, const char *emsg)
{
  struct GNUNET_CONTAINER_MetaData *meta;
  struct GNUNET_CRYPTO_EcdsaPrivateKey *ns;
  struct GNUNET_FS_BlockOptions bo;

  if (NULL != emsg)
  {
    FPRINTF (stderr, "Error publishing: %s\n", emsg);
    err = 1;
    GNUNET_FS_stop (fs);
    return;
  }
  ns = GNUNET_CRYPTO_ecdsa_key_create ();
  meta = GNUNET_CONTAINER_meta_data_create ();
  sks_expect_uri = GNUNET_FS_uri_dup (uri);
  bo.content_priority = 1;
  bo.anonymity_level = 1;
  bo.replication_level = 0;
  bo.expiration_time =
      GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_MINUTES);
  GNUNET_CRYPTO_ecdsa_key_get_public (ns, &nsid);
  GNUNET_FS_publish_sks (fs, ns, "this", "next", meta, uri,
                         &bo, GNUNET_FS_PUBLISH_OPTION_NONE, &sks_cont, NULL);
  GNUNET_CONTAINER_meta_data_destroy (meta);
  GNUNET_free (ns);
}


static void
testNamespace ()
{
  struct GNUNET_CRYPTO_EcdsaPrivateKey *ns;
  struct GNUNET_FS_BlockOptions bo;
  struct GNUNET_CONTAINER_MetaData *meta;
  struct GNUNET_FS_Uri *ksk_uri;
  struct GNUNET_FS_Uri *sks_uri;

  ns = GNUNET_CRYPTO_ecdsa_key_create ();
  meta = GNUNET_CONTAINER_meta_data_create ();
  ksk_uri = GNUNET_FS_uri_parse ("gnunet://fs/ksk/testnsa", NULL);
  bo.content_priority = 1;
  bo.anonymity_level = 1;
  bo.replication_level = 0;
  bo.expiration_time =
      GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_MINUTES);
  sks_uri = GNUNET_FS_uri_sks_create (&nsid, "root");
  GNUNET_FS_publish_ksk (fs,
			 ksk_uri, meta, sks_uri,
			 &bo, GNUNET_FS_PUBLISH_OPTION_NONE,
			 &adv_cont, NULL);
  GNUNET_FS_uri_destroy (sks_uri);
  kill_task =
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &do_timeout,
                                    NULL);
  GNUNET_FS_uri_destroy (ksk_uri);
  GNUNET_CONTAINER_meta_data_destroy (meta);
  GNUNET_free (ns);
}


static void
run (void *cls,
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_TESTING_Peer *peer)
{
  fs = GNUNET_FS_start (cfg, "test-fs-namespace", &progress_cb, NULL,
                        GNUNET_FS_FLAGS_NONE, GNUNET_FS_OPTIONS_END);
  testNamespace ();
}


int
main (int argc, char *argv[])
{
  if (0 != GNUNET_TESTING_peer_run ("test-fs-namespace",
				    "test_fs_namespace_data.conf",
				    &run, NULL))
    return 1;
  return err;
}


/* end of test_fs_namespace.c */