2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file include/gnunet_constants.h
23 * @brief "global" constants for performance tuning
24 * @author Christian Grothoff
27 #ifndef GNUNET_CONSTANTS_H
28 #define GNUNET_CONSTANTS_H
33 #if 0 /* keep Emacsens' auto-indent happy */
38 #include "gnunet_bandwidth_lib.h"
41 * Bandwidth (in/out) to assume initially (before either peer has
42 * communicated any particular preference). Should be rather low; set
43 * so that at least one maximum-size message can be send roughly once
46 #define GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT GNUNET_BANDWIDTH_value_init (1024)
49 * After how long do we consider a connection to a peer dead
50 * if we don't receive messages from the peer?
52 #define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
55 * After how long do we consider a connection to a peer dead
56 * if we got an explicit disconnect and were unable to reconnect?
58 #define GNUNET_CONSTANTS_DISCONNECT_SESSION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
61 * How long do we delay reading more from a peer after a quota violation?
63 #define GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
66 * How long do we wait after a FORK+EXEC before testing for the
67 * resulting process to be up (port open, waitpid, etc.)?
69 #define GNUNET_CONSTANTS_EXEC_WAIT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 200)
72 * After how long do we retry a service connection that was
73 * unavailable? Used in cases where an exponential back-off
74 * seems inappropriate.
76 #define GNUNET_CONSTANTS_SERVICE_RETRY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
79 * After how long do we consider a service unresponsive
80 * even if we assume that the service commonly does not
81 * respond instantly (DNS, Database, etc.).
83 #define GNUNET_CONSTANTS_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 10)
86 * How long do we delay messages to get larger packet sizes (CORKing)?
88 #define GNUNET_CONSTANTS_MAX_CORK_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
91 * Until which load do we consider the peer overly idle
92 * (which means that we would like to use more resources).<p>
94 * Note that we use 70 to leave some room for applications
95 * to consume resources "idly" (i.e. up to 85%) and then
96 * still have some room for "paid for" resource consumption.
98 #define GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD 70
101 * After how long do we expire an address in a HELLO that we just
102 * validated? This value is also used for our own addresses when we
105 #define GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
109 * Size of the 'struct EncryptedMessage' of the core (which
110 * is the per-message overhead of the core).
112 #define GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE (24 + sizeof (GNUNET_HashCode))
115 * Size of the 'struct OutboundMessage' of the transport
116 * (which, in combination with the
117 * GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE) defines
118 * the headers that must be pre-pendable to all GNUnet
119 * messages. Taking GNUNET_SERVER_MAX_MESSAGE_SIZE
120 * and subtracting these two constants defines the largest
121 * message core can handle.
123 #define GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE (16 + sizeof (struct GNUNET_PeerIdentity))
127 * What is the maximum size for encrypted messages? Note that this
128 * number imposes a clear limit on the maximum size of any message.
129 * Set to a value close to 64k but not so close that transports will
130 * have trouble with their headers.
132 * Could theoretically be 64k minus (GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE +
133 * GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE), but we're going
134 * to be more conservative for now.
136 #define GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE (63 * 1024)
140 * K-value that must be used for the bloom filters in 'GET'
143 #define GNUNET_CONSTANTS_BLOOMFILTER_K 16
147 #if 0 /* keep Emacsens' auto-indent happy */