gnunet/src/ats/plugin_ats2_common.c

/*
   This file is part of GNUnet.
   Copyright (C) 2011-2015, 2018 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 ats/plugin_ats2_common.c
 * @brief ATS solver helper functions to be inlined
 * @author Matthias Wachs
 * @author Christian Grothoff
 */

/**
 * Default bandwidth assigned to a network: 64 KB/s
 */
#define DEFAULT_BANDWIDTH 65536


/**
 * Parse @a cfg for @a quota as specified for @a direction of
 * network type @a nts.
 *
 * @param cfg configuration to parse
 * @param nts network type string to get quota for
 * @param direction direction to get quota for ("IN" or "OUT")
 * @param quota[out] set to quota, #DEFAULT_BANDWIDTH if @a cfg does not say anything useful
 */
static void
get_quota(const struct GNUNET_CONFIGURATION_Handle *cfg,
          const char *nts,
          const char *direction,
          unsigned long long *quota)
{
  char *quota_str;
  char *quota_s;
  int res;

  GNUNET_asprintf(&quota_s,
                  "%s_QUOTA_%s",
                  nts,
                  direction);
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string(cfg,
                                            "ATS",
                                            quota_s,
                                            &quota_str))
    {
      GNUNET_log_config_missing(GNUNET_ERROR_TYPE_WARNING,
                                "ATS",
                                quota_s);
      GNUNET_free(quota_s);
      return;
    }
  GNUNET_free(quota_s);
  res = GNUNET_NO;
  if (0 == strcmp(quota_str,
                  "unlimited"))
    {
      *quota = ULONG_MAX;
      res = GNUNET_YES;
    }
  if ((GNUNET_NO == res) &&
      (GNUNET_OK ==
       GNUNET_STRINGS_fancy_size_to_bytes(quota_str,
                                          quota)))
    res = GNUNET_YES;
  if ((GNUNET_NO == res) &&
      (1 ==
       sscanf(quota_str,
              "%llu",
              quota)))
    res = GNUNET_YES;
  if (GNUNET_NO == res)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 _("Could not load %s quota for network `%s': `%s', assigning default bandwidth %llu\n"),
                 direction,
                 nts,
                 quota_str,
                 (unsigned long long)DEFAULT_BANDWIDTH);
      *quota = DEFAULT_BANDWIDTH;
    }
  GNUNET_free(quota_str);
}