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/*
This file is part of GNUnet.
Copyright (C) 2009-2014 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU 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.
*/
/**
* @file core/gnunet-service-core_neighbours.h
* @brief code for managing of 'encrypted' sessions (key exchange done)
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_CORE_SESSIONS_H
#define GNUNET_SERVICE_CORE_SESSIONS_H
#include "gnunet-service-core.h"
#include "gnunet-service-core_kx.h"
/**
* Create a session, a key exchange was just completed.
*
* @param peer peer that is now connected
* @param kx key exchange that completed
*/
void
GSC_SESSIONS_create (const struct GNUNET_PeerIdentity *peer,
struct GSC_KeyExchangeInfo *kx);
/**
* The other peer has indicated that he 'lost' the session
* (KX down), reinitialize the session on our end, in particular
* this means to restart the typemap transmission.
*
* @param peer peer that is now connected
*/
void
GSC_SESSIONS_reinit (const struct GNUNET_PeerIdentity *peer);
/**
* The other peer has confirmed receiving our type map,
* check if it is current and if so, stop retransmitting it.
*
* @param peer peer that confirmed the type map
* @param msg confirmation message we received
*/
void
GSC_SESSIONS_confirm_typemap (const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_MessageHeader *msg);
/**
* End the session with the given peer (we are no longer
* connected).
*
* @param pid identity of peer to kill session with
*/
void
GSC_SESSIONS_end (const struct GNUNET_PeerIdentity *pid);
/**
* Traffic is being solicited for the given peer. This means that the
* message queue on the transport-level (NEIGHBOURS subsystem) is now
* empty and it is now OK to transmit another (non-control) message.
*
* @param pid identity of peer ready to receive data
*/
void
GSC_SESSIONS_solicit (const struct GNUNET_PeerIdentity *pid);
/**
* Queue a request from a client for transmission to a particular peer.
*
* @param car request to queue; this handle is then shared between
* the caller (CLIENTS subsystem) and SESSIONS and must not
* be released by either until either 'GNUNET_SESSIONS_dequeue',
* or 'GNUNET_CLIENTS_failed'
* have been invoked on it
*/
void
GSC_SESSIONS_queue_request (struct GSC_ClientActiveRequest *car);
/**
* Dequeue a request from a client from transmission to a particular peer.
*
* @param car request to dequeue; this handle will then be 'owned' by
* the caller (CLIENTS sysbsystem)
*/
void
GSC_SESSIONS_dequeue_request (struct GSC_ClientActiveRequest *car);
/**
* Transmit a message to a particular peer.
*
* @param car original request that was queued and then solicited,
* ownership does not change (dequeue will be called soon).
* @param msg message to transmit
* @param cork is corking allowed?
* @param priority how important is this message
*/
void
GSC_SESSIONS_transmit (struct GSC_ClientActiveRequest *car,
const struct GNUNET_MessageHeader *msg,
int cork,
enum GNUNET_CORE_Priority priority);
/**
* Broadcast an updated typemap message to all neighbours.
* Restarts the retransmissions until the typemaps are confirmed.
*
* @param msg message to transmit
*/
void
GSC_SESSIONS_broadcast_typemap (const struct GNUNET_MessageHeader *msg);
/**
* We have a new client, notify it about all current sessions.
*
* @param client the new client
*/
void
GSC_SESSIONS_notify_client_about_sessions (struct GSC_Client *client);
/**
* We've received a typemap message from a peer, update ours.
* Notifies clients about the session.
*
* @param peer peer this is about
* @param msg typemap update message
*/
void
GSC_SESSIONS_set_typemap (const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_MessageHeader *msg);
/**
* The given peer send a message of the specified type. Make sure the
* respective bit is set in its type-map and that clients are notified
* about the session.
*
* @param peer peer this is about
* @param type type of the message
*/
void
GSC_SESSIONS_add_to_typemap (const struct GNUNET_PeerIdentity *peer,
uint16_t type);
/**
* Initialize sessions subsystem.
*/
void
GSC_SESSIONS_init (void);
/**
* Shutdown sessions subsystem.
*/
void
GSC_SESSIONS_done (void);
#endif
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