43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
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/*
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE". Use of the mrouted program represents acceptance of
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* the terms and conditions listed in that file.
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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*
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* igmpv2.h,v 3.8.4.1 1997/11/18 23:25:58 fenner Exp
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*/
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/*
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* Constants for IGMP Version 2. Several of these, especially the
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* robustness variable, should be variables and not constants.
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*/
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#define IGMP_ROBUSTNESS_VARIABLE 2
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#define IGMP_QUERY_INTERVAL 125
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#define IGMP_QUERY_RESPONSE_INTERVAL 10
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#define IGMP_GROUP_MEMBERSHIP_INTERVAL (IGMP_ROBUSTNESS_VARIABLE * \
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IGMP_QUERY_INTERVAL + \
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IGMP_QUERY_RESPONSE_INTERVAL)
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#define IGMP_OTHER_QUERIER_PRESENT_INTERVAL (IGMP_ROBUSTNESS_VARIABLE * \
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IGMP_QUERY_INTERVAL + \
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IGMP_QUERY_RESPONSE_INTERVAL / 2)
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/* Round to the nearest TIMER_INTERVAL */
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#define IGMP_STARTUP_QUERY_INTERVAL (((IGMP_QUERY_INTERVAL / 4) \
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/ TIMER_INTERVAL) * TIMER_INTERVAL)
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#define IGMP_STARTUP_QUERY_COUNT IGMP_ROBUSTNESS_VARIABLE
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#define IGMP_LAST_MEMBER_QUERY_INTERVAL 1
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#define IGMP_LAST_MEMBER_QUERY_COUNT IGMP_ROBUSTNESS_VARIABLE
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/*
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* OLD_AGE_THRESHOLD is the number of IGMP_QUERY_INTERVAL's to remember the
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* presence of an IGMPv1 group member. According to the IGMPv2 specification,
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* routers remember this presence for [Robustness Variable] * [Query Interval] +
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* [Query Response Interval]. However, OLD_AGE_THRESHOLD is in units of
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* [Query Interval], so doesn't have sufficient resolution to represent
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* [Query Response Interval]. When the timer mechanism gets an efficient
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* method of refreshing timers, this should get fixed.
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*/
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#define OLD_AGE_THRESHOLD IGMP_ROBUSTNESS_VARIABLE
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