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3 Copyright (C) 2009 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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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 Affero General Public License for more details.
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @author Christian Grothoff
25 * Global constants for performance tuning
27 * @defgroup constants Constant definitions
28 * Global constants for performance tuning
32 #ifndef GNUNET_CONSTANTS_H
33 #define GNUNET_CONSTANTS_H
38 #if 0 /* keep Emacsens' auto-indent happy */
45 * Bandwidth (in/out) to assume initially (before either peer has
46 * communicated any particular preference). Should be rather low; set
47 * so that at least one maximum-size message can be send roughly once
50 #define GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT GNUNET_BANDWIDTH_value_init (1024)
53 * After how long do we consider a connection to a peer dead
54 * if we don't receive messages from the peer?
56 #define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply ( \
57 GNUNET_TIME_UNIT_MINUTES, 5)
60 * How long do we delay reading more from a peer after a quota violation?
62 #define GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT GNUNET_TIME_relative_multiply ( \
63 GNUNET_TIME_UNIT_SECONDS, 2)
66 * After how long do we consider a service unresponsive
67 * even if we assume that the service commonly does not
68 * respond instantly (DNS, Database, etc.).
70 #define GNUNET_CONSTANTS_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply ( \
71 GNUNET_TIME_UNIT_MINUTES, 10)
74 * How long do we delay messages to get larger packet sizes (CORKing)?
76 #define GNUNET_CONSTANTS_MAX_CORK_DELAY GNUNET_TIME_relative_multiply ( \
77 GNUNET_TIME_UNIT_SECONDS, 1)
80 * After what amount of latency for a message do we print a warning?
82 #define GNUNET_CONSTANTS_LATENCY_WARN GNUNET_TIME_relative_multiply ( \
83 GNUNET_TIME_UNIT_SECONDS, 3)
86 * Until which load do we consider the peer overly idle
87 * (which means that we would like to use more resources).<p>
89 * Note that we use 70 to leave some room for applications
90 * to consume resources "idly" (i.e. up to 85%) and then
91 * still have some room for "paid for" resource consumption.
93 #define GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD 70
96 * For how long do we allow unused bandwidth
97 * from the past to carry over into the future? (in seconds)
99 #define GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S 5
103 * After how long do we expire an address in a HELLO that we just
104 * validated? This value is also used for our own addresses when we
107 #define GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply ( \
108 GNUNET_TIME_UNIT_HOURS, 12)
112 * How long do we cache records at most in the DHT?
114 #define GNUNET_CONSTANTS_DHT_MAX_EXPIRATION GNUNET_TIME_relative_multiply ( \
115 GNUNET_TIME_UNIT_HOURS, 24)
119 * Size of the `struct EncryptedMessage` of the core (which
120 * is the per-message overhead of the core).
122 #define GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE (24 + sizeof(struct \
126 * What is the maximum size for encrypted messages? Note that this
127 * number imposes a clear limit on the maximum size of any message.
128 * Set to a value close to 64k but not so close that transports will
129 * have trouble with their headers.
131 * Could theoretically be 64k minus (#GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE +
132 * #GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE), but we're going
133 * to be more conservative for now.
135 #define GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE (63 * 1024)
138 * Size of the CADET message overhead:
139 * = sizeof (struct GNUNET_CADET_TunnelEncryptedMessage)
140 * + sizeof (struct GNUNET_CADET_ChannelAppDataMessage)
141 * + sizeof (struct GNUNET_CADET_ConnectionEncryptedAckMessage))
143 * Checked for correcteness in gnunet-service-cadet_tunnel.c: GCT_init().
145 #define GNUNET_CONSTANTS_CADET_P2P_OVERHEAD 164
148 * Maximum message size that can be sent on CADET.
150 #define GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE \
151 (GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE \
152 - GNUNET_CONSTANTS_CADET_P2P_OVERHEAD)
155 * Largest block that can be stored in the DHT.
157 #define GNUNET_CONSTANTS_MAX_BLOCK_SIZE (62 * 1024)
161 * K-value that must be used for the bloom filters in 'GET'
164 #define GNUNET_CONSTANTS_BLOOMFILTER_K 16
167 #if 0 /* keep Emacsens' auto-indent happy */
176 /** @} */ /* end of group */