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/*
This file is part of GNUnet.
Copyright (C) 2009 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.
*/
/**
* @author Christian Grothoff
*
* @file
* Global constants for performance tuning
*
* @defgroup constants Constant definitions
* Global constants for performance tuning
* @{
*/
#ifndef GNUNET_CONSTANTS_H
#define GNUNET_CONSTANTS_H
#ifdef __cplusplus
extern "C"
{
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
/**
* Bandwidth (in/out) to assume initially (before either peer has
* communicated any particular preference). Should be rather low; set
* so that at least one maximum-size message can be send roughly once
* per minute.
*/
#define GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT GNUNET_BANDWIDTH_value_init (1024)
/**
* After how long do we consider a connection to a peer dead
* if we don't receive messages from the peer?
*/
#define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
/**
* How long do we delay reading more from a peer after a quota violation?
*/
#define GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
/**
* After how long do we consider a service unresponsive
* even if we assume that the service commonly does not
* respond instantly (DNS, Database, etc.).
*/
#define GNUNET_CONSTANTS_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 10)
/**
* How long do we delay messages to get larger packet sizes (CORKing)?
*/
#define GNUNET_CONSTANTS_MAX_CORK_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
/**
* After what amount of latency for a message do we print a warning?
*/
#define GNUNET_CONSTANTS_LATENCY_WARN GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
/**
* Until which load do we consider the peer overly idle
* (which means that we would like to use more resources).<p>
*
* Note that we use 70 to leave some room for applications
* to consume resources "idly" (i.e. up to 85%) and then
* still have some room for "paid for" resource consumption.
*/
#define GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD 70
/**
* For how long do we allow unused bandwidth
* from the past to carry over into the future? (in seconds)
*/
#define GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S 5
/**
* After how long do we expire an address in a HELLO that we just
* validated? This value is also used for our own addresses when we
* create a HELLO.
*/
#define GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
/**
* How long do we cache records at most in the DHT?
*/
#define GNUNET_CONSTANTS_DHT_MAX_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 24)
/**
* Size of the `struct EncryptedMessage` of the core (which
* is the per-message overhead of the core).
*/
#define GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE (24 + sizeof (struct GNUNET_HashCode))
/**
* What is the maximum size for encrypted messages? Note that this
* number imposes a clear limit on the maximum size of any message.
* Set to a value close to 64k but not so close that transports will
* have trouble with their headers.
*
* Could theoretically be 64k minus (#GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE +
* #GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE), but we're going
* to be more conservative for now.
*/
#define GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE (63 * 1024)
/**
* Size of the CADET message overhead:
* = sizeof (struct GNUNET_CADET_TunnelEncryptedMessage)
* + sizeof (struct GNUNET_CADET_ChannelAppDataMessage)
* + sizeof (struct GNUNET_CADET_ConnectionEncryptedAckMessage))
*
* Checked for correcteness in gnunet-service-cadet_tunnel.c: GCT_init().
*/
#define GNUNET_CONSTANTS_CADET_P2P_OVERHEAD 164
/**
* Maximum message size that can be sent on CADET.
*/
#define GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE \
(GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE - GNUNET_CONSTANTS_CADET_P2P_OVERHEAD)
/**
* Largest block that can be stored in the DHT.
*/
#define GNUNET_CONSTANTS_MAX_BLOCK_SIZE (62 * 1024)
/**
* K-value that must be used for the bloom filters in 'GET'
* queries.
*/
#define GNUNET_CONSTANTS_BLOOMFILTER_K 16
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
#endif
/** @} */ /* end of group */
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