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32c9ce50d9
This breaks backward compatibility for the wire protocol and messages stored in the database. The database schema version has been incremented.
47 lines
1.5 KiB
Java
47 lines
1.5 KiB
Java
package org.briarproject.api.messaging;
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public interface MessagingConstants {
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/** The current version of the messaging protocol. */
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byte PROTOCOL_VERSION = 0;
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/** The length of the packet header in bytes. */
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int HEADER_LENGTH = 4;
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/** The maximum length of the packet payload in bytes. */
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int MAX_PAYLOAD_LENGTH = 32 * 1024; // 32 KiB
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/** The maximum number of public groups a user may subscribe to. */
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int MAX_SUBSCRIPTIONS = 300;
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/** The maximum length of a group's name in UTF-8 bytes. */
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int MAX_GROUP_NAME_LENGTH = 50;
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/** The length of a group's random salt in bytes. */
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int GROUP_SALT_LENGTH = 32;
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/**
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* The maximum length of a message body in bytes. To allow for future
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* changes in the protocol, this is smaller than the maximum payload length
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* even when all the message's other fields have their maximum lengths.
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*/
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int MAX_BODY_LENGTH = MAX_PAYLOAD_LENGTH - 1024;
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/** The maximum length of a message's content type in UTF-8 bytes. */
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int MAX_CONTENT_TYPE_LENGTH = 50;
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/** The maximum length of a message's subject line in UTF-8 bytes. */
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int MAX_SUBJECT_LENGTH = 100;
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/** The length of a message's random salt in bytes. */
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int MESSAGE_SALT_LENGTH = 32;
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/**
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* When calculating the retention time of the database, the timestamp of
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* the oldest message in the database is rounded down to a multiple of
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* this value to avoid revealing the presence of any particular message.
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*/
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int RETENTION_GRANULARITY = 60 * 1000; // 1 minute
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}
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