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/*
This file is part of GNUnet.
Copyright (C) 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 transport/gnunet-service-transport_validation.h
* @brief address validation API
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_TRANSPORT_VALIDATION_H
#define GNUNET_SERVICE_TRANSPORT_VALIDATION_H
#include "gnunet_statistics_service.h"
#include "gnunet_transport_plugin.h"
#include "gnunet_util_lib.h"
#include "gnunet_hello_lib.h"
/**
* Start the validation subsystem.
*
* @param max_fds maximum number of fds to use
*/
void
GST_validation_start (unsigned int max_fds);
/**
* Stop the validation subsystem.
*/
void
GST_validation_stop (void);
/**
* Update if we are using an address for a connection actively right now.
* Based on this, the validation module will measure latency for the
* address more or less often.
*
* @param address the address that we are now using (or not)
* @param in_use #GNUNET_YES if we are now using the address for a connection,
* #GNUNET_NO if we are no longer using the address for a connection
*/
void
GST_validation_set_address_use (const struct GNUNET_HELLO_Address *address,
int in_use);
/**
* We've received a PING. If appropriate, generate a PONG.
*
* @param sender peer sending the PING
* @param hdr the PING
* @param sender_address address of the sender, NULL if we did not initiate
* @param session session we got the PING from
* @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
*/
int
GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
const struct GNUNET_MessageHeader *hdr,
const struct GNUNET_HELLO_Address *sender_address,
struct GNUNET_ATS_Session *session);
/**
* We've received a PONG. Check if it matches a pending PING and
* mark the respective address as confirmed.
*
* @param sender peer sending the PONG
* @param hdr the PONG
* @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
*/
int
GST_validation_handle_pong (const struct GNUNET_PeerIdentity *sender,
const struct GNUNET_MessageHeader *hdr);
/**
* We've received a HELLO, check which addresses are new and trigger
* validation.
*
* @param hello the HELLO we received
* @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
*/
int
GST_validation_handle_hello (const struct GNUNET_MessageHeader *hello);
/**
* Validate an individual address.
*
* @param address address we should try to validate
*/
void
GST_validation_handle_address (const struct GNUNET_HELLO_Address *address);
/**
* Function called for each address (or address status change) that
* the validation module is aware of (for the given target).
*
* @param cls closure
* @param public_key public key for the peer, never NULL
* @param valid_until is ZERO if we never validated the address,
* otherwise a time up to when we consider it (or was) valid
* @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
* is ZERO if the address is considered valid (no validation needed)
* otherwise a time in the future if we're currently denying re-validation
* @param address the address
*/
typedef void
(*GST_ValidationAddressCallback) (void *cls,
struct GNUNET_TIME_Absolute valid_until,
struct GNUNET_TIME_Absolute validation_block,
const struct GNUNET_HELLO_Address *address);
/**
* Call the given function for each address for the given target.
*
* @param target peer information is requested for
* @param cb function to call; will not be called after this function returns
* @param cb_cls closure for @a cb
*/
void
GST_validation_get_addresses (const struct GNUNET_PeerIdentity *target,
GST_ValidationAddressCallback cb, void *cb_cls);
#endif
/* end of file gnunet-service-transport_validation.h */
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