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- /*
- This file is part of GNUnet.
- Copyright (C) 2009-2019 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
- */
- /**
- * @author Christian Grothoff
- *
- * @file
- * API of the transport service towards the CORE service (TNG version)
- *
- * @defgroup transport TRANSPORT service
- * Communication with other peers
- *
- * @see [Documentation](https://gnunet.org/transport-service)
- *
- * @{
- */
- #ifndef GNUNET_TRANSPORT_CORE_SERVICE_H
- #define GNUNET_TRANSPORT_CORE_SERVICE_H
- #ifdef __cplusplus
- extern "C" {
- #if 0 /* keep Emacsens' auto-indent happy */
- }
- #endif
- #endif
- #include "gnunet_util_lib.h"
- /**
- * Version number of the transport API.
- */
- #define GNUNET_TRANSPORT_CORE_VERSION 0x00000000
- /**
- * Opaque handle to the service.
- */
- struct GNUNET_TRANSPORT_CoreHandle;
- /**
- * Function called to notify transport users that another
- * peer connected to us.
- *
- * @param cls closure
- * @param peer the identity of the peer that connected; this
- * pointer will remain valid until the disconnect, hence
- * applications do not necessarily have to make a copy
- * of the value if they only need it until disconnect
- * @param mq message queue to use to transmit to @a peer
- * @return closure to use in MQ handlers
- */
- typedef void *(*GNUNET_TRANSPORT_NotifyConnect) (
- void *cls,
- const struct GNUNET_PeerIdentity *peer,
- struct GNUNET_MQ_Handle *mq);
- /**
- * Function called to notify transport users that another peer
- * disconnected from us. The message queue that was given to the
- * connect notification will be destroyed and must not be used
- * henceforth.
- *
- * @param cls closure from #GNUNET_TRANSPORT_core_connect
- * @param peer the peer that disconnected
- * @param handlers_cls closure of the handlers, was returned from the
- * connect notification callback
- */
- typedef void (*GNUNET_TRANSPORT_NotifyDisconnect) (
- void *cls,
- const struct GNUNET_PeerIdentity *peer,
- void *handler_cls);
- /**
- * Connect to the transport service. Note that the connection may
- * complete (or fail) asynchronously.
- *
- * @param cfg configuration to use
- * @param self our own identity (API should check that it matches
- * the identity found by transport), or NULL (no check)
- * @param handlers array of message handlers; note that the
- * closures provided will be ignored and replaced
- * with the respective return value from @a nc
- * @param handlers array with handlers to call when we receive messages, or NULL
- * @param cls closure for the @a nc, @a nd and @a neb callbacks
- * @param nc function to call on connect events, or NULL
- * @param nd function to call on disconnect events, or NULL
- * @param neb function to call if we have excess bandwidth to a peer, or NULL
- * @return NULL on error
- */
- struct GNUNET_TRANSPORT_CoreHandle *
- GNUNET_TRANSPORT_core_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_PeerIdentity *self,
- const struct GNUNET_MQ_MessageHandler *handlers,
- void *cls,
- GNUNET_TRANSPORT_NotifyConnect nc,
- GNUNET_TRANSPORT_NotifyDisconnect nd);
- /**
- * Disconnect from the transport service.
- *
- * @param handle handle returned from connect
- */
- void
- GNUNET_TRANSPORT_core_disconnect (struct GNUNET_TRANSPORT_CoreHandle *handle);
- /**
- * Notification from the CORE service to the TRANSPORT service
- * that the CORE service has finished processing a message from
- * TRANSPORT (via the @code{handlers} of #GNUNET_TRANSPORT_core_connect())
- * and that it is thus now OK for TRANSPORT to send more messages
- * for @a pid.
- *
- * Used to provide flow control, this is our equivalent to
- * #GNUNET_SERVICE_client_continue() of an ordinary service.
- *
- * Note that due to the use of a window, TRANSPORT may send multiple
- * messages destined for the same peer even without an intermediate
- * call to this function. However, CORE must still call this function
- * once per message received, as otherwise eventually the window will
- * be full and TRANSPORT will stop providing messages to CORE for @a
- * pid.
- *
- * @param ch core handle
- * @param pid which peer was the message from that was fully processed by CORE
- */
- void
- GNUNET_TRANSPORT_core_receive_continue (struct GNUNET_TRANSPORT_CoreHandle *ch,
- const struct GNUNET_PeerIdentity *pid);
- /**
- * Checks if a given peer is connected to us and get the message queue.
- * Convenience function.
- *
- * @param handle connection to transport service
- * @param peer the peer to check
- * @return NULL if disconnected, otherwise message queue for @a peer
- */
- struct GNUNET_MQ_Handle *
- GNUNET_TRANSPORT_core_get_mq (struct GNUNET_TRANSPORT_CoreHandle *handle,
- const struct GNUNET_PeerIdentity *peer);
- #if 0 /* keep Emacsens' auto-indent happy */
- {
- #endif
- #ifdef __cplusplus
- }
- #endif
- /* ifndef GNUNET_TRANSPORT_CORE_SERVICE_H */
- #endif
- /** @} */ /* end of group */
- /* end of gnunet_transport_core_service.h */
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