regex_api_announce.c

Go to the documentation of this file.

/*
     This file is part of GNUnet
     Copyright (C) 2012, 2013, 2016 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
 */
#include "platform.h"
#include "gnunet_protocols.h"
#include "gnunet_util_lib.h"
#include "gnunet_regex_service.h"
#include "regex_ipc.h"
 
#define LOG(kind, ...) GNUNET_log_from (kind, "regex-api", __VA_ARGS__)
 
struct GNUNET_REGEX_Announcement
{
  struct GNUNET_MQ_Handle *mq;
 
  const struct GNUNET_CONFIGURATION_Handle *cfg;
 
  char *regex;
 
  struct GNUNET_TIME_Relative refresh_delay;
 
  uint16_t compression;
};
 
 
static void
announce_reconnect (struct GNUNET_REGEX_Announcement *a);
 
 
static void
announce_mq_error_handler (void *cls,
                           enum GNUNET_MQ_Error error)
{
  struct GNUNET_REGEX_Announcement *a = cls;
 
  GNUNET_MQ_destroy (a->mq);
  a->mq = NULL;
  announce_reconnect (a);
}
 
 
static void
announce_reconnect (struct GNUNET_REGEX_Announcement *a)
{
  struct GNUNET_MQ_Envelope *env;
  struct AnnounceMessage *am;
  size_t slen;
 
  a->mq = GNUNET_CLIENT_connect (a->cfg,
                                 "regex",
                                 NULL,
                                 &announce_mq_error_handler,
                                 a);
  if (NULL == a->mq)
    return;
  slen = strlen (a->regex) + 1;
  env = GNUNET_MQ_msg_extra (am,
                             slen,
                             GNUNET_MESSAGE_TYPE_REGEX_ANNOUNCE);
  am->compression = htons (a->compression);
  am->reserved = htons (0);
  am->refresh_delay = GNUNET_TIME_relative_hton (a->refresh_delay);
  GNUNET_memcpy (&am[1],
                 a->regex,
                 slen);
  GNUNET_MQ_send (a->mq,
                  env);
}
 
 
struct GNUNET_REGEX_Announcement *
GNUNET_REGEX_announce (const struct GNUNET_CONFIGURATION_Handle *cfg,
                       const char *regex,
                       struct GNUNET_TIME_Relative refresh_delay,
                       uint16_t compression)
{
  struct GNUNET_REGEX_Announcement *a;
  size_t slen;
 
  slen = strlen (regex) + 1;
  if (slen + sizeof(struct AnnounceMessage) >= GNUNET_MAX_MESSAGE_SIZE)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                _ ("Regex `%s' is too long!\n"),
                regex);
    GNUNET_break (0);
    return NULL;
  }
  a = GNUNET_new (struct GNUNET_REGEX_Announcement);
  a->cfg = cfg;
  a->refresh_delay = refresh_delay;
  a->compression = compression;
  a->regex = GNUNET_strdup (regex);
  announce_reconnect (a);
  if (NULL == a->mq)
  {
    GNUNET_free (a->regex);
    GNUNET_free (a);
    return NULL;
  }
  return a;
}
 
 
void
GNUNET_REGEX_announce_cancel (struct GNUNET_REGEX_Announcement *a)
{
  GNUNET_MQ_destroy (a->mq);
  GNUNET_free (a->regex);
  GNUNET_free (a);
}
 
 
/* end of regex_api_announce.c */