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/*
This file is part of GNUnet.
(C) 2010,2011 Christian Grothoff (and other contributing authors)
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, 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_util_lib.h"
/**
* Start the validation subsystem.
*/
void
GST_validation_start (void);
/**
* Stop the validation subsystem.
*/
void
GST_validation_stop (void);
/**
* We've received a PING. If appropriate, generate a PONG.
*
* @param sender peer sending the PING
* @param hdr the PING
* @param plugin_name name of plugin that received the PING
* @param sender_address address of the sender as known to the plugin, NULL
* if we did not initiate the connection
* @param sender_address_len number of bytes in sender_address
*/
void
GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
const struct GNUNET_MessageHeader *hdr,
const char *plugin_name,
const void *sender_address,
size_t sender_address_len);
/**
* 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
* @param plugin_name name of plugin that received the PONG
* @param sender_address address of the sender as known to the plugin, NULL
* if we did not initiate the connection
* @param sender_address_len number of bytes in sender_address
*/
void
GST_validation_handle_pong (const struct GNUNET_PeerIdentity *sender,
const struct GNUNET_MessageHeader *hdr,
const char *plugin_name,
const void *sender_address,
size_t sender_address_len);
/**
* We've received a HELLO, check which addresses are new and trigger
* validation.
*
* @param hello the HELLO we received
*/
void
GST_validation_handle_hello (const struct GNUNET_MessageHeader *hello);
/**
* Opaque handle to stop incremental validation address callbacks.
*/
struct GST_ValidationIteratorContext;
/**
* Function called for each address (or address status change) that
* the validation module is aware of (for the given target).
*
* @param cls closure
* @param target peer this change is about, 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 plugin_name name of the plugin
* @param plugin_address binary address
* @param plugin_address_len length of address
*/
typedef void (*GST_ValidationAddressCallback)(void *cls,
const struct GNUNET_PeerIdentity *target,
struct GNUNET_TIME_Absolute valid_until,
struct GNUNET_TIME_Absolute validation_block,
const char *plugin_name,
const void *plugin_address,
size_t plugin_address_len);
/**
* Call the given function for each address for the given target.
* Can either give a snapshot (synchronous API) or be continuous.
*
* @param target peer information is requested for
* @param snapshot_only GNUNET_YES to iterate over addresses once, GNUNET_NO to
* continue to give information about addresses as it evolves
* @param cb function to call; will not be called after this function returns
* if snapshot_only is GNUNET_YES
* @param cb_cls closure for 'cb'
* @return context to cancel, NULL if 'snapshot_only' is GNUNET_YES
*/
struct GST_ValidationIteratorContext *
GST_validation_get_addresses (const struct GNUNET_PeerIdentity *target,
int snapshot_only,
GST_ValidationAddressCallback cb,
void *cb_cls);
/**
* Cancel an active validation address iteration.
*
* @param ctx the context of the operation that is cancelled
*/
void
GST_validation_get_addresses_cancel (struct GST_ValidationIteratorContext *ctx);
#endif
/* end of file gnunet-service-transport_validation.h */
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