transport_api_offer_hello.c

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/*
     This file is part of GNUnet.
     Copyright (C) 2009-2013, 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_util_lib.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_transport_service.h"
 
 
struct GNUNET_TRANSPORT_OfferHelloHandle
{
  struct GNUNET_MQ_Handle *mq;
 
  GNUNET_SCHEDULER_TaskCallback cont;
 
  void *cls;
};
 
 
static void
finished_hello (void *cls)
{
  struct GNUNET_TRANSPORT_OfferHelloHandle *ohh = cls;
 
  if (NULL != ohh->cont)
    ohh->cont (ohh->cls);
  GNUNET_TRANSPORT_offer_hello_cancel (ohh);
}
 
 
struct GNUNET_TRANSPORT_OfferHelloHandle *
GNUNET_TRANSPORT_offer_hello (const struct GNUNET_CONFIGURATION_Handle *cfg,
                              const struct GNUNET_MessageHeader *hello,
                              GNUNET_SCHEDULER_TaskCallback cont,
                              void *cont_cls)
{
  struct GNUNET_TRANSPORT_OfferHelloHandle *ohh
    = GNUNET_new (struct GNUNET_TRANSPORT_OfferHelloHandle);
  struct GNUNET_MQ_Envelope *env;
  struct GNUNET_PeerIdentity peer;
 
  if (GNUNET_OK !=
      GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hello,
                           &peer))
  {
    GNUNET_break (0);
    GNUNET_free (ohh);
    return NULL;
  }
  ohh->mq = GNUNET_CLIENT_connect (cfg,
                                   "transport",
                                   NULL,
                                   NULL,
                                   ohh);
  if (NULL == ohh->mq)
  {
    GNUNET_free (ohh);
    return NULL;
  }
  ohh->cont = cont;
  ohh->cls = cont_cls;
  GNUNET_break (ntohs (hello->type) == GNUNET_MESSAGE_TYPE_HELLO);
  env = GNUNET_MQ_msg_copy (hello);
  GNUNET_MQ_notify_sent (env,
                         &finished_hello,
                         ohh);
  GNUNET_MQ_send (ohh->mq,
                  env);
  return ohh;
}
 
 
void
GNUNET_TRANSPORT_offer_hello_cancel (struct
                                     GNUNET_TRANSPORT_OfferHelloHandle *ohh)
{
  GNUNET_MQ_destroy (ohh->mq);
  GNUNET_free (ohh);
}
 
 
/* end of transport_api_offer_hello.c */