--- /dev/null
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2009-2013, 2016, 2018, 2019 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 transport/transport_api2_address.c
+ * @brief library to inform the transport service about addresses to be validated
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_protocols.h"
+#include "gnunet_transport_address_service.h"
+#include "gnunet_ats_transport_service.h"
+#include "transport.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "transport-api-address",__VA_ARGS__)
+
+
+/**
+ * Handle for the transport service (includes all of the
+ * state for the transport service).
+ */
+struct GNUNET_TRANSPORT_AddressHandle
+{
+
+ /**
+ * My client connection to the transport service.
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * My configuration.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * ID of the task trying to reconnect to the service.
+ */
+ struct GNUNET_SCHEDULER_Task *reconnect_task;
+
+ /**
+ * Delay until we try to reconnect.
+ */
+ struct GNUNET_TIME_Relative reconnect_delay;
+
+};
+
+
+/**
+ * Function that will schedule the job that will try
+ * to connect us again to the client.
+ *
+ * @param h transport service to reconnect
+ */
+static void
+disconnect_and_schedule_reconnect (struct GNUNET_TRANSPORT_AddressHandle *h);
+
+
+/**
+ * Generic error handler, called with the appropriate
+ * error code and the same closure specified at the creation of
+ * the message queue.
+ * Not every message queue implementation supports an error handler.
+ *
+ * @param cls closure with the `struct GNUNET_TRANSPORT_AddressHandle *`
+ * @param error error code
+ */
+static void
+mq_error_handler (void *cls,
+ enum GNUNET_MQ_Error error)
+{
+ struct GNUNET_TRANSPORT_AddressHandle *h = cls;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Error receiving from transport service, disconnecting temporarily.\n");
+ disconnect_and_schedule_reconnect (h);
+}
+
+
+/**
+ * Try again to connect to transport service.
+ *
+ * @param cls the handle to the transport service
+ */
+static void
+reconnect (void *cls)
+{
+ struct GNUNET_TRANSPORT_AddressHandle *h = cls;
+ struct GNUNET_MQ_MessageHandler handlers[] = {
+ GNUNET_MQ_handler_end ()
+ };
+
+ h->reconnect_task = NULL;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to transport service.\n");
+ GNUNET_assert (NULL == h->mq);
+ h->mq = GNUNET_CLIENT_connect (h->cfg,
+ "transport",
+ handlers,
+ &mq_error_handler,
+ h);
+}
+
+
+/**
+ * Disconnect from the transport service.
+ *
+ * @param h transport service to reconnect
+ */
+static void
+disconnect (struct GNUNET_TRANSPORT_AddressHandle *h)
+{
+ if (NULL != h->mq)
+ {
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
+ }
+}
+
+
+/**
+ * Function that will schedule the job that will try
+ * to connect us again to the client.
+ *
+ * @param h transport service to reconnect
+ */
+static void
+disconnect_and_schedule_reconnect (struct GNUNET_TRANSPORT_AddressHandle *h)
+{
+ GNUNET_assert (NULL == h->reconnect_task);
+ disconnect (h);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling task to reconnect to transport service in %s.\n",
+ GNUNET_STRINGS_relative_time_to_string (h->reconnect_delay,
+ GNUNET_YES));
+ h->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (h->reconnect_delay,
+ &reconnect,
+ h);
+ h->reconnect_delay = GNUNET_TIME_STD_BACKOFF (h->reconnect_delay);
+}
+
+
+/**
+ * Connect to the transport service.
+ *
+ * @param cfg configuration to use
+ * @return NULL on error
+ */
+struct GNUNET_TRANSPORT_AddressHandle *
+GNUNET_TRANSPORT_address_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ struct GNUNET_TRANSPORT_AddressHandle *h;
+
+ h = GNUNET_new (struct GNUNET_TRANSPORT_AddressHandle);
+ h->cfg = cfg;
+ h->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to transport service\n");
+ reconnect (h);
+ if (NULL == h->mq)
+ {
+ GNUNET_free (h);
+ return NULL;
+ }
+ return h;
+}
+
+
+/**
+ * Disconnect from the transport service.
+ *
+ * @param handle handle to the service as returned from #GNUNET_TRANSPORT_address_connect()
+ */
+void
+GNUNET_TRANSPORT_address_disconnect (struct GNUNET_TRANSPORT_AddressHandle *handle)
+{
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Transport disconnect called!\n");
+ /* this disconnects all neighbours... */
+ disconnect (handle);
+ /* and now we stop trying to connect again... */
+ if (NULL != handle->reconnect_task)
+ {
+ GNUNET_SCHEDULER_cancel (handle->reconnect_task);
+ handle->reconnect_task = NULL;
+ }
+ GNUNET_free (handle);
+}
+
+
+/**
+ * The client has learned about a possible address for peer @a pid
+ * (i.e. via broadcast, multicast, DHT, ...). The transport service
+ * should consider validating it. Note that the plugin is NOT expected
+ * to have verified the signature, the transport service must decide
+ * whether to check the signature.
+ *
+ * While the notification is sent to @a ch asynchronously, this API
+ * does not return a handle as the delivery of addresses is simply
+ * unreliable, and if @a ch is down, the data provided will simply be
+ * lost.
+ *
+ * @param ch communicator handle
+ * @param raw raw address data
+ * @param raw_size number of bytes in @a raw
+ */
+void
+GNUNET_TRANSPORT_address_try (struct GNUNET_TRANSPORT_AddressHandle *ch,
+ const void *raw,
+ const size_t raw_size)
+{
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_MessageHeader *hdr;
+
+ env = GNUNET_MQ_msg_extra (hdr,
+ raw_size,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_CONSIDER_VERIFY);
+ memcpy (&hdr[1],
+ raw,
+ raw_size);
+ GNUNET_MQ_send (ch->mq,
+ env);
+}
+
+
+
+/* end of transport_api2_address.c */
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