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This commit is contained in:
Ondrej Zajicek 2010-12-23 12:24:40 +01:00
parent f0160f0e06
commit 39847cda73
1 changed files with 8 additions and 0 deletions
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8
proto/ospf/rt.c
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@ -517,6 +517,13 @@ link_back(struct ospf_area *oa, struct top_hash_entry *en, struct top_hash_entry
if (!en || !par) return 0; if (!en || !par) return 0;
/* We should check whether there is a link back from en to par,
this is used in SPF calc (RFC 2328 16.1. (2b)). According to RFC 2328
note 23, we don't have to find the same link that is used for par
to en, any link is enough. This we do for ptp links. For net-rt
links, we have to find the same link to compute proper lb/lb_id,
which may be later used as the next hop. */
/* In OSPFv2, en->lb is set here. In OSPFv3, en->lb is just cleared here, /* In OSPFv2, en->lb is set here. In OSPFv3, en->lb is just cleared here,
it is set in process_prefixes() to any global addres in the area */ it is set in process_prefixes() to any global addres in the area */
@ -556,6 +563,7 @@ link_back(struct ospf_area *oa, struct top_hash_entry *en, struct top_hash_entry
break; break;
case LSART_VLNK: case LSART_VLNK:
case LSART_PTP: case LSART_PTP:
/* Not necessary the same link, see RFC 2328 [23] */
tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id); tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
if (tmp == par) if (tmp == par)
return 1; return 1;