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Fixes link-back check.

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This commit is contained in:
Ondrej Zajicek 2009-12-06 22:05:50 +01:00
parent b76aeb8234
commit 9807690b41
1 changed files with 27 additions and 28 deletions
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55
proto/ospf/rt.c
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@ -439,24 +439,26 @@ ospf_rt_spfa(struct ospf_area *oa)
} }
} }
#if 0
static int 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; u32 i, *rts;
struct ospf_lsa_net *ln; struct ospf_lsa_net *ln;
struct ospf_lsa_rt *rt; struct ospf_lsa_rt *rt;
struct ospf_lsa_rt_link *rtl, *rr; struct ospf_lsa_rt_link *rtl, *rr;
struct top_hash_entry *tmp;
struct proto_ospf *po = oa->po; struct proto_ospf *po = oa->po;
if (!pre) return 0; if (!en || !par) return 0;
if (!fol) return 0;
switch (fol->lsa.type) // FIXME lb should be properly set for vlinks */
en->lb = IPA_NONE;
switch (en->lsa.type)
{ {
case LSA_T_RT: 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); 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); rtl = (rr + i);
switch (rtl->type) 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: case LSART_STUB:
break; break;
case LSART_NET: case LSART_NET:
if (ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_NET) == pre) #ifdef OSPFv2
{ /* In OSPFv2, rtl->id is IP addres of DR, Router ID is not known */
fol->lb = ipa_from_u32(rtl->data); 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; return 1;
}
break; break;
case LSART_VLNK: case LSART_VLNK:
case LSART_PTP: case LSART_PTP:
if (ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_RT) == pre) tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
{ if (tmp == par)
fol->lb = ipa_from_u32(rtl->data);
return 1; return 1;
}
break; break;
default: 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;
} }
} }
break; break;
case LSA_T_NET: case LSA_T_NET:
ln = fol->lsa_body; ln = en->lsa_body;
rts = (u32 *) (ln + 1); 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; return 1;
} }
}
break; break;
default: default:
bug("Unknown lsa type. (id = %R)", fol->lsa.id); bug("Unknown lsa type %x.", en->lsa.type);
} }
return 0; return 0;
} }
#endif
static void static void
ospf_rt_sum_tr(struct ospf_area *oa) 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 * next hops. I'll start as soon as nest will
*/ */
/* FIXME - fix link_back() /* We should check whether there is a reverse link from en to par, */
* NOTE - we should not change link_back when
* it is already computed with different way and calc_next_hop()
* for current would fail
if (!link_back(oa, en, par)) if (!link_back(oa, en, par))
return; return;
*/
if (!calc_next_hop(oa, en, par)) if (!calc_next_hop(oa, en, par))
{ {