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authorOndrej Zajicek <santiago@crfreenet.org>2009-12-06 22:05:50 +0100
committerOndrej Zajicek <santiago@crfreenet.org>2009-12-06 22:05:50 +0100
commit9807690b413f3a1d29d064761cc99ed5261cfb58 (patch)
tree4186f7b0d4ecef778ef5dc281a634541da0c0cf2 /proto
parentb76aeb823446616b746b52b5c8152f4c5a73b242 (diff)
downloadbird-9807690b413f3a1d29d064761cc99ed5261cfb58.tar
bird-9807690b413f3a1d29d064761cc99ed5261cfb58.zip
Fixes link-back check.
Diffstat (limited to 'proto')
-rw-r--r--proto/ospf/rt.c55
1 files changed, 27 insertions, 28 deletions
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index bd19364..dde6dcd 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -439,24 +439,26 @@ ospf_rt_spfa(struct ospf_area *oa)
}
}
-#if 0
static int
-link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entry *pre)
+link_back(struct ospf_area *oa, struct top_hash_entry *en, struct top_hash_entry *par)
{
u32 i, *rts;
struct ospf_lsa_net *ln;
struct ospf_lsa_rt *rt;
struct ospf_lsa_rt_link *rtl, *rr;
+ struct top_hash_entry *tmp;
struct proto_ospf *po = oa->po;
- if (!pre) return 0;
- if (!fol) return 0;
- switch (fol->lsa.type)
+ if (!en || !par) return 0;
+
+ // FIXME lb should be properly set for vlinks */
+ en->lb = IPA_NONE;
+ switch (en->lsa.type)
{
case LSA_T_RT:
- rt = (struct ospf_lsa_rt *) fol->lsa_body;
+ rt = (struct ospf_lsa_rt *) en->lsa_body;
rr = (struct ospf_lsa_rt_link *) (rt + 1);
- for (i = 0; i < lsa_rt_count(&fol->lsa); i++)
+ for (i = 0; i < lsa_rt_count(&en->lsa); i++)
{
rtl = (rr + i);
switch (rtl->type)
@@ -464,43 +466,44 @@ link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entr
case LSART_STUB:
break;
case LSART_NET:
- if (ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_NET) == pre)
- {
- fol->lb = ipa_from_u32(rtl->data);
+#ifdef OSPFv2
+ /* In OSPFv2, rtl->id is IP addres of DR, Router ID is not known */
+ tmp = ospf_hash_find_net(po->gr, oa->areaid, rtl->id);
+#else /* OSPFv3 */
+ tmp = ospf_hash_find(po->gr, oa->areaid, rtl->nif, rtl->id, LSA_T_NET);
+#endif
+ if (tmp == par)
return 1;
- }
+
break;
case LSART_VLNK:
case LSART_PTP:
- if (ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_RT) == pre)
- {
- fol->lb = ipa_from_u32(rtl->data);
+ tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
+ if (tmp == par)
return 1;
- }
+
break;
default:
- log("Unknown link type in router lsa. (rid = %R)", fol->lsa.id);
+ log(L_WARN "Unknown link type in router lsa. (rid = %R)", en->lsa.rt);
break;
}
}
break;
case LSA_T_NET:
- ln = fol->lsa_body;
+ ln = en->lsa_body;
rts = (u32 *) (ln + 1);
- for (i = 0; i < lsa_net_count(&fol->lsa); i++)
+ for (i = 0; i < lsa_net_count(&en->lsa); i++)
{
- if (ospf_hash_find(po->gr, oa->areaid, *(rts + i), *(rts + i), LSA_T_RT) == pre)
- {
+ tmp = ospf_hash_find_rt(po->gr, oa->areaid, rts[i]);
+ if (tmp == par)
return 1;
- }
}
break;
default:
- bug("Unknown lsa type. (id = %R)", fol->lsa.id);
+ bug("Unknown lsa type %x.", en->lsa.type);
}
return 0;
}
-#endif
static void
ospf_rt_sum_tr(struct ospf_area *oa)
@@ -986,13 +989,9 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
* next hops. I'll start as soon as nest will
*/
- /* FIXME - fix link_back()
- * NOTE - we should not change link_back when
- * it is already computed with different way and calc_next_hop()
- * for current would fail
+ /* We should check whether there is a reverse link from en to par, */
if (!link_back(oa, en, par))
return;
- */
if (!calc_next_hop(oa, en, par))
{