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