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Fixes OSPFv3 route generation for local stub networks.

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This commit is contained in:
Ondrej Zajicek 2010-04-02 19:03:18 +02:00
parent e7b09e4ab9
commit e60d55becd
1 changed files with 61 additions and 45 deletions
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106
proto/ospf/rt.c
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@ -146,6 +146,46 @@ ri_install(struct proto_ospf *po, ip_addr prefix, int pxlen, int dest,
}
}
#ifdef OSPFv2
static struct ospf_iface *
find_stub_src(struct ospf_area *oa, ip_addr px, int pxlen)
{
struct ospf_iface *iff;
struct ifa *addr;
WALK_LIST(iff, oa->po->iface_list)
if ((iff->type != OSPF_IT_VLINK) &&
(iff->oa == oa) &&
ipa_equal(iff->addr->px, px) &&
(iff->addr->pxlen == pxlen))
return iff;
return NULL;
}
#else /* OSPFv3 */
static struct ospf_iface *
find_stub_src(struct ospf_area *oa, ip_addr px, int pxlen)
{
struct ospf_iface *iff;
struct ifa *a;
WALK_LIST(iff, oa->po->iface_list)
if ((iff->type != OSPF_IT_VLINK) &&
(iff->oa == oa))
WALK_LIST(a, iff->iface->addrs)
if (ipa_equal(a->prefix, px) &&
(a->pxlen == pxlen) &&
!(a->flags & IA_SECONDARY))
return iff;
return NULL;
}
#endif
static void
add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_hash_entry *en)
{
@ -161,7 +201,21 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_
nf.ifa = en->nhi;
nf.rid = en->lsa.rt;
/* FIXME check nf.ifa on stubs */
if (en == oa->rt)
{
/*
* Local stub networks does not have proper iface in en->nhi
* (because they all have common top_hash_entry en).
* We have to find iface responsible for that stub network.
* Some stubnets does not have any iface. Ignore them.
*/
nf.ifa = find_stub_src(oa, px, pxlen);
if (!nf.ifa)
return;
}
ri_install(oa->po, px, pxlen, ORT_NET, &nf, NULL);
}
@ -243,45 +297,10 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
{
#ifdef OSPFv2
case LSART_STUB:
/*
* This violates rfc2328! But it is mostly harmless.
*/
DBG("\n");
orta nf;
nf.type = RTS_OSPF;
nf.options = 0;
nf.metric1 = act->dist + rtl->metric;
nf.metric2 = LSINFINITY;
nf.tag = 0;
nf.oa = oa;
nf.ar = act;
nf.nh = act->nh;
nf.ifa = act->nhi;
nf.rid = act->lsa.rt;
if (act == oa->rt)
{
struct ospf_iface *iff;
WALK_LIST(iff, po->iface_list) /* Try to find corresponding interface */
{
// FIXME this is broken
if (iff->iface && (iff->type != OSPF_IT_VLINK) &&
(rtl->id == (ipa_to_u32(ipa_mkmask(iff->addr->pxlen))
& ipa_to_u32(iff->addr->prefix)))) /* No VLINK and IP must match */
{
nf.ifa = iff;
break;
}
}
}
if (!nf.ifa)
continue;
ri_install(po, ipa_from_u32(rtl->id),
ipa_mklen(ipa_from_u32(rtl->data)), ORT_NET, &nf, NULL);
/* This violates RFC 2328! But it is mostly harmless. */
add_network(oa, ipa_from_u32(rtl->id),
ipa_mklen(ipa_from_u32(rtl->data)),
act->dist + rtl->metric, act);
break;
#endif
@ -292,21 +311,18 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
#else /* OSPFv3 */
tmp = ospf_hash_find(po->gr, oa->areaid, rtl->nif, rtl->id, LSA_T_NET);
#endif
if (tmp == NULL)
DBG("Not found!\n");
else
DBG("Found. :-)\n");
break;
case LSART_VLNK:
case LSART_PTP:
tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
DBG("PTP found.\n");
break;
default:
log("Unknown link type in router lsa. (rid = %R)", act->lsa.id);
break;
}
if (tmp)
DBG("Going to add cand, Mydist: %u, Req: %u\n",
tmp->dist, act->dist + rtl->metric);