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/*
This file is part of GNUnet.
Copyright (C) 2015 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 transport/gnunet-service-transport_ats.h
* @brief interfacing between transport and ATS service
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_TRANSPORT_ATS_H
#define GNUNET_SERVICE_TRANSPORT_ATS_H
#include "gnunet_ats_service.h"
/**
* Initialize ATS subsystem.
*/
void
GST_ats_init (void);
/**
* Shutdown ATS subsystem.
*/
void
GST_ats_done (void);
/**
* Test if ATS knows about this @a address and @a session.
* Note that even if the address is expired, we return
* #GNUNET_YES if the respective session matches.
*
* @param address the address
* @param session the session
* @return #GNUNET_YES if @a address is known, #GNUNET_NO if not.
*/
int
GST_ats_is_known (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session);
/**
* Test if ATS knows about this @a address. Note that
* expired addresses do not count.
*
* @param address the address
* @return #GNUNET_YES if @a address is known, #GNUNET_NO if not.
*/
int
GST_ats_is_known_no_session (const struct GNUNET_HELLO_Address *address);
/**
* Temporarily block a valid address for use by ATS for address
* suggestions. This function should be called if an address was
* suggested by ATS but failed to perform (i.e. failure to establish a
* session or to exchange the PING/PONG).
*
* @param address the address to block
* @param session the session (can be NULL)
*/
void
GST_ats_block_address (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session);
/**
* Reset address blocking time. Resets the exponential
* back-off timer for this address to zero. Called when
* an address was used to create a successful connection.
*
* @param address the address to reset the blocking timer
* @param session the session (can be NULL)
*/
void
GST_ats_block_reset (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session);
/**
* Notify ATS about a new inbound @a address. The @a address in
* combination with the @a session must be new, but this function will
* perform a santiy check. If the @a address is indeed new, make it
* available to ATS.
*
* @param address the address
* @param session the session
* @param prop performance information
*/
void
GST_ats_add_inbound_address (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session,
const struct GNUNET_ATS_Properties *prop);
/**
* Notify ATS about a new address including the network this address is
* located in. The address must NOT be inbound and must be new to ATS.
*
* @param address the address
* @param prop performance information
*/
void
GST_ats_add_address (const struct GNUNET_HELLO_Address *address,
const struct GNUNET_ATS_Properties *prop);
/**
* Notify ATS about a new @a session now existing for the given
* @a address. Essentially, an outbound @a address was used
* to establish a @a session. It is safe to call this function
* repeatedly for the same @a address and @a session pair.
*
* @param address the address
* @param session the session
*/
void
GST_ats_new_session (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session);
/**
* Notify ATS about utilization changes to an @a address.
* Does nothing if the @a address is not known to us.
*
* @param address our information about the address
* @param bps_in new utilization inbound
* @param bps_out new utilization outbound
*/
void
GST_ats_update_utilization (const struct GNUNET_HELLO_Address *address,
uint32_t bps_in,
uint32_t bps_out);
/**
* Notify ATS about @a delay changes to properties of an @a address.
* Does nothing if the @a address is not known to us.
*
* @param address the address
* @param session the session
* @param delay new delay value
*/
void
GST_ats_update_delay (const struct GNUNET_HELLO_Address *address,
struct GNUNET_TIME_Relative delay);
/**
* Notify ATS about DV @a distance change to an @a address.
* Does nothing if the @a address is not known to us.
*
* @param address the address
* @param distance new distance value
*/
void
GST_ats_update_distance (const struct GNUNET_HELLO_Address *address,
uint32_t distance);
/**
* Notify ATS that the @a session (but not the @a address) of
* a given @a address is no longer relevant. (The @a session
* went down.) This function may be called even if for the
* respective outbound address #GST_ats_new_session() was
* never called and thus the pair is unknown to ATS. In this
* case, the call is simply ignored.
*
* @param address the address
* @param session the session
*/
void
GST_ats_del_session (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session);
/**
* Notify ATS that the address has expired and thus cannot
* be used any longer. This function must only be called
* if the corresponding session is already gone.
*
* @param address the address
*/
void
GST_ats_expire_address (const struct GNUNET_HELLO_Address *address);
#endif
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