| // Copyright 2003-2005 Arthur van Hoff, Rick Blair |
| // Licensed under Apache License version 2.0 |
| // Original license LGPL |
| |
| package javax.jmdns.impl.constants; |
| |
| /** |
| * DNS constants. |
| * |
| * @author Arthur van Hoff, Jeff Sonstein, Werner Randelshofer, Pierre Frisch, Rick Blair |
| */ |
| public final class DNSConstants { |
| // http://www.iana.org/assignments/dns-parameters |
| |
| // changed to final class - jeffs |
| public static final String MDNS_GROUP = "224.0.0.251"; |
| public static final String MDNS_GROUP_IPV6 = "FF02::FB"; |
| public static final int MDNS_PORT = Integer.parseInt(System.getProperty("net.mdns.port", "5353")); |
| public static final int DNS_PORT = 53; |
| |
| // One hour expiration time |
| public static final int DNS_TTL = 25; //60 * 60; |
| |
| public static final int MAX_MSG_TYPICAL = 1460; |
| public static final int MAX_MSG_ABSOLUTE = 8972; |
| |
| public static final int FLAGS_QR_MASK = 0x8000; // Query response mask |
| public static final int FLAGS_QR_QUERY = 0x0000; // Query |
| public static final int FLAGS_QR_RESPONSE = 0x8000; // Response |
| |
| public static final int FLAGS_AA = 0x0400; // Authorative answer |
| public static final int FLAGS_TC = 0x0200; // Truncated |
| public static final int FLAGS_RD = 0x0100; // Recursion desired |
| public static final int FLAGS_RA = 0x8000; // Recursion available |
| |
| public static final int FLAGS_Z = 0x0040; // Zero |
| public static final int FLAGS_AD = 0x0020; // Authentic data |
| public static final int FLAGS_CD = 0x0010; // Checking disabled |
| |
| // Time Intervals for various functions |
| |
| public static final int SHARED_QUERY_TIME = 20; // milliseconds before send shared query |
| public static final int QUERY_WAIT_INTERVAL = 225; // milliseconds between query loops. |
| public static final int PROBE_WAIT_INTERVAL = 250; // milliseconds between probe loops. |
| public static final int RESPONSE_MIN_WAIT_INTERVAL = 20; // minimal wait interval for response. |
| public static final int RESPONSE_MAX_WAIT_INTERVAL = 115; // maximal wait interval for response |
| public static final int PROBE_CONFLICT_INTERVAL = 1000; // milliseconds to wait after conflict. |
| public static final int PROBE_THROTTLE_COUNT = 10; // After x tries go 1 time a sec. on probes. |
| public static final int PROBE_THROTTLE_COUNT_INTERVAL = 5000; // We only increment the throttle count, if the previous increment is inside this interval. |
| public static final int ANNOUNCE_WAIT_INTERVAL = 1000; // milliseconds between Announce loops. |
| public static final int RECORD_REAPER_INTERVAL = 10000; // milliseconds between cache cleanups. |
| public static final int RECORD_EXPIRY_DELAY = 1; // This is 1s delay used in ttl and therefore in seconds |
| public static final int KNOWN_ANSWER_TTL = 120; |
| public static final int ANNOUNCED_RENEWAL_TTL_INTERVAL = DNS_TTL * 500; // 50% of the TTL in milliseconds |
| |
| public static final long CLOSE_TIMEOUT = ANNOUNCE_WAIT_INTERVAL * 5L; |
| public static final long SERVICE_INFO_TIMEOUT = ANNOUNCE_WAIT_INTERVAL * 6L; |
| |
| public static final int NETWORK_CHECK_INTERVAL = 10 * 1000; // 10 secondes |
| |
| } |
