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Merge pull request #2169 from piotrjurkiewicz/eigrp_feasibility

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eigrpd: Consider only feasible successors as successors
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Donald Sharp 2018-05-03 23:02:36 -04:00 committed by GitHub
commit 1c96f2fb96
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1 changed files with 18 additions and 11 deletions
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27
eigrpd/eigrp_topology.c
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@ -443,17 +443,24 @@ void eigrp_topology_update_node_flags(struct eigrp_prefix_entry *dest)
struct eigrp *eigrp = eigrp_lookup(); struct eigrp *eigrp = eigrp_lookup();
for (ALL_LIST_ELEMENTS_RO(dest->entries, node, entry)) { for (ALL_LIST_ELEMENTS_RO(dest->entries, node, entry)) {
if (entry->reported_distance < dest->fdistance) {
// is feasible successor, can be successor
if (((uint64_t)entry->distance if (((uint64_t)entry->distance
<= (uint64_t)dest->distance * (uint64_t)eigrp->variance) <= (uint64_t)dest->distance
&& entry->distance != EIGRP_MAX_METRIC) // is successor * (uint64_t)eigrp->variance)
{ && entry->distance != EIGRP_MAX_METRIC) {
entry->flags |= EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG; // is successor
entry->flags &= ~EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG; entry->flags |=
} else if (entry->reported_distance EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG;
< dest->fdistance) // is feasible successor entry->flags &=
{ ~EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG;
entry->flags |= EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG; } else {
entry->flags &= ~EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG; // is feasible successor only
entry->flags |=
EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG;
entry->flags &=
~EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG;
}
} else { } else {
entry->flags &= ~EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG; entry->flags &= ~EIGRP_NEXTHOP_ENTRY_FSUCCESSOR_FLAG;
entry->flags &= ~EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG; entry->flags &= ~EIGRP_NEXTHOP_ENTRY_SUCCESSOR_FLAG;