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/*
This file is part of GNUnet.
Copyright (C) 2009, 2010, 2011 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, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file core/gnunet-service-core_kx.h
* @brief code for managing the key exchange (SET_KEY, PING, PONG) with other peers
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_CORE_KX_H
#define GNUNET_SERVICE_CORE_KX_H
#include "gnunet_util_lib.h"
#include "gnunet_transport_service.h"
/**
* Information about the status of a key exchange with another peer.
*/
struct GSC_KeyExchangeInfo;
/**
* Encrypt and transmit a message with the given payload.
*
* @param kx key exchange context
* @param payload payload of the message
* @param payload_size number of bytes in 'payload'
*/
void
GSC_KX_encrypt_and_transmit (struct GSC_KeyExchangeInfo *kx,
const void *payload,
size_t payload_size);
/**
* Initialize KX subsystem.
*
* @param pk private key to use for the peer
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
int
GSC_KX_init (struct GNUNET_CRYPTO_EddsaPrivateKey *pk);
/**
* Shutdown KX subsystem.
*/
void
GSC_KX_done (void);
/**
* Check if the given neighbour has excess bandwidth available.
*
* @param target neighbour to check
* @return #GNUNET_YES if excess bandwidth is available, #GNUNET_NO if not
*/
int
GSC_NEIGHBOURS_check_excess_bandwidth (const struct GSC_KeyExchangeInfo *target);
/**
* Check how many messages are queued for the given neighbour.
*
* @param target neighbour to check
* @return number of items in the message queue
*/
unsigned int
GSC_NEIGHBOURS_get_queue_length (const struct GSC_KeyExchangeInfo *target);
/**
* Handle #GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request. For this
* request type, the client does not have to have transmitted an INIT
* request. All current peers are returned, regardless of which
* message types they accept.
*
* @param mq message queue to add for monitoring
*/
void
GSC_KX_handle_client_monitor_peers (struct GNUNET_MQ_Handle *mq);
#endif
/* end of gnunet-service-core_kx.h */
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