summaryrefslogtreecommitdiff
path: root/proto/ospf
diff options
context:
space:
mode:
Diffstat (limited to 'proto/ospf')
-rw-r--r--proto/ospf/iface.c7
-rw-r--r--proto/ospf/ospf.h5
-rw-r--r--proto/ospf/rt.c128
-rw-r--r--proto/ospf/topology.c21
4 files changed, 76 insertions, 85 deletions
diff --git a/proto/ospf/iface.c b/proto/ospf/iface.c
index 05442dfe..e7c9e72d 100644
--- a/proto/ospf/iface.c
+++ b/proto/ospf/iface.c
@@ -197,6 +197,13 @@ ospf_iface_down(struct ospf_iface *ifa)
ifa->cost = 0;
ifa->vip = IPA_NONE;
}
+
+ ifa->rt_pos_beg = 0;
+ ifa->rt_pos_end = 0;
+#ifdef OSPFv3
+ ifa->px_pos_beg = 0;
+ ifa->px_pos_end = 0;
+#endif
}
diff --git a/proto/ospf/ospf.h b/proto/ospf/ospf.h
index e260dc08..75ffb6de 100644
--- a/proto/ospf/ospf.h
+++ b/proto/ospf/ospf.h
@@ -195,8 +195,13 @@ struct ospf_iface
ip_addr bdrip; /* Backup DR */
u32 drid;
u32 bdrid;
+ s16 rt_pos_beg; /* Position of iface in Router-LSA, begin, inclusive */
+ s16 rt_pos_end; /* Position of iface in Router-LSA, end, exclusive */
#ifdef OSPFv3
+ s16 px_pos_beg; /* Position of iface in Rt Prefix-LSA, begin, inclusive */
+ s16 px_pos_end; /* Position of iface in Rt Prefix-LSA, end, exclusive */
+
u32 dr_iface_id; /* if drid is valid, this is iface_id of DR (for connecting network) */
u8 instance_id; /* Used to differentiate between more OSPF
instances on one interface */
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 953a679a..2f9fe493 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -10,7 +10,7 @@
static void add_cand(list * l, struct top_hash_entry *en,
struct top_hash_entry *par, u32 dist,
- struct ospf_area *oa, struct ospf_lsa_rt_link *rtl);
+ struct ospf_area *oa, int i);
static void rt_sync(struct proto_ospf *po);
/* In ospf_area->rtr we store paths to routers, but we use RID (and not IP address)
@@ -208,48 +208,31 @@ ri_install_ext(struct proto_ospf *po, ip_addr prefix, int pxlen, orta *new)
memcpy(&old->n, new, sizeof(orta));
}
-
-#ifdef OSPFv2
-
-static struct ospf_iface *
-find_stub_src(struct ospf_area *oa, ip_addr px, int pxlen)
+static inline struct ospf_iface *
+rt_pos_to_ifa(struct ospf_area *oa, int pos)
{
- struct ospf_iface *iff;
-
- WALK_LIST(iff, oa->po->iface_list)
- if ((iff->type != OSPF_IT_VLINK) &&
- (iff->oa == oa) &&
- ipa_equal(iff->addr->prefix, px) &&
- (iff->addr->pxlen == pxlen))
- return iff;
-
+ struct ospf_iface *ifa;
+ WALK_LIST(ifa, oa->po->iface_list)
+ if (pos >= ifa->rt_pos_beg && pos < ifa->rt_pos_end)
+ return ifa;
return NULL;
}
-#else /* OSPFv3 */
-
-static struct ospf_iface *
-find_stub_src(struct ospf_area *oa, ip_addr px, int pxlen)
+#ifdef OSPFv3
+static inline struct ospf_iface *
+px_pos_to_ifa(struct ospf_area *oa, int pos)
{
- 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;
-
+ struct ospf_iface *ifa;
+ WALK_LIST(ifa, oa->po->iface_list)
+ if (pos >= ifa->px_pos_beg && pos < ifa->px_pos_end)
+ return ifa;
return NULL;
}
-
#endif
+
static void
-add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_hash_entry *en)
+add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_hash_entry *en, int pos)
{
orta nf = {
.type = RTS_OSPF,
@@ -272,7 +255,13 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_
* be removed in rt_sync().
*/
- struct ospf_iface *ifa = find_stub_src(oa, px, pxlen);
+ struct ospf_iface *ifa;
+#ifdef OSPFv2
+ ifa = rt_pos_to_ifa(oa, pos);
+#else /* OSPFv3 */
+ ifa = px_pos_to_ifa(oa, pos);
+#endif
+
nf.nhs = ifa ? new_nexthop(oa->po, IPA_NONE, ifa->iface, ifa->ecmp_weight) : NULL;
}
@@ -335,7 +324,7 @@ process_prefixes(struct ospf_area *oa)
if ((pxopts & OPT_PX_LA) && ipa_zero(src->lb))
src->lb = pxa;
- add_network(oa, pxa, pxlen, src->dist + metric, src);
+ add_network(oa, pxa, pxlen, src->dist + metric, src, i);
}
}
}
@@ -347,7 +336,7 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
{
// struct proto *p = &oa->po->proto;
struct proto_ospf *po = oa->po;
- u32 i;
+ int i;
struct ospf_lsa_rt *rt = en->lsa_body;
struct ospf_lsa_rt_link *rr = (struct ospf_lsa_rt_link *) (rt + 1);
@@ -370,7 +359,7 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
*/
add_network(oa, ipa_from_u32(rtl->id),
ipa_mklen(ipa_from_u32(rtl->data)),
- act->dist + rtl->metric, act);
+ act->dist + rtl->metric, act, i);
break;
#endif
@@ -396,7 +385,7 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
if (tmp)
DBG("Going to add cand, Mydist: %u, Req: %u\n",
tmp->dist, act->dist + rtl->metric);
- add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa, rtl);
+ add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa, i);
}
}
@@ -482,7 +471,7 @@ ospf_rt_spfa(struct ospf_area *oa)
#ifdef OSPFv2
add_network(oa, ipa_and(ipa_from_u32(act->lsa.id), ln->netmask),
- ipa_mklen(ln->netmask), act->dist, act);
+ ipa_mklen(ln->netmask), act->dist, act, -1);
#endif
rts = (u32 *) (ln + 1);
@@ -494,7 +483,7 @@ ospf_rt_spfa(struct ospf_area *oa)
DBG("Found :-)\n");
else
DBG("Not found!\n");
- add_cand(&oa->cand, tmp, act, act->dist, oa, NULL);
+ add_cand(&oa->cand, tmp, act, act->dist, oa, -1);
}
break;
}
@@ -1327,31 +1316,6 @@ ospf_rt_spf(struct proto_ospf *po)
static inline int
-match_dr(struct ospf_iface *ifa, struct top_hash_entry *en)
-{
-#ifdef OSPFv2
- return (ifa->drid == en->lsa.rt) && (ipa_to_u32(ifa->drip) == en->lsa.id);
-#else /* OSPFv3 */
- return (ifa->drid == en->lsa.rt) && (ifa->dr_iface_id == en->lsa.id);
-#endif
-}
-
-
-static inline int
-match_rtlink(struct ospf_iface *ifa, struct ospf_lsa_rt_link *rtl)
-{
-#ifdef OSPFv2
- return ((ifa->type == OSPF_IT_PTP) || (ifa->type == OSPF_IT_PTMP)) &&
- (ifa->cost == rtl->metric) &&
- (((ifa->addr->flags & IA_UNNUMBERED) ? ifa->iface->index :
- ipa_to_u32(ifa->addr->ip)) == rtl->data);
-#else /* OSPFv3 */
- return ((ifa->type == OSPF_IT_PTP) || (ifa->type == OSPF_IT_PTMP)) &&
- (ifa->cost == rtl->metric) && (ifa->iface->index == rtl->lif);
-#endif
-}
-
-static inline int
inherit_nexthops(struct mpnh *pn)
{
/* Proper nexthops (with defined GW) or dummy vlink nexthops (without iface) */
@@ -1360,7 +1324,7 @@ inherit_nexthops(struct mpnh *pn)
static struct mpnh *
calc_next_hop(struct ospf_area *oa, struct top_hash_entry *en,
- struct top_hash_entry *par, struct ospf_lsa_rt_link *rtl)
+ struct top_hash_entry *par, int pos)
{
// struct proto *p = &oa->po->proto;
struct proto_ospf *po = oa->po;
@@ -1386,28 +1350,28 @@ calc_next_hop(struct ospf_area *oa, struct top_hash_entry *en,
/* The first case - local network */
if ((en->lsa.type == LSA_T_NET) && (par == oa->rt))
{
- WALK_LIST(ifa, po->iface_list)
- if (match_dr(ifa, en))
- return new_nexthop(po, IPA_NONE, ifa->iface, ifa->ecmp_weight);
+ ifa = rt_pos_to_ifa(oa, pos);
+ if (!ifa)
+ return NULL;
- return NULL;
+ return new_nexthop(po, IPA_NONE, ifa->iface, ifa->ecmp_weight);
}
/* The second case - ptp or ptmp neighbor */
if ((en->lsa.type == LSA_T_RT) && (par == oa->rt))
{
- if (rtl->type == LSART_VLNK)
+ ifa = rt_pos_to_ifa(oa, pos);
+ if (!ifa)
+ return NULL;
+
+ if (ifa->type == OSPF_IT_VLINK)
return new_nexthop(po, IPA_NONE, NULL, 0);
- WALK_LIST(ifa, po->iface_list)
- if (match_rtlink(ifa, rtl))
- {
- struct ospf_neighbor *m = find_neigh(ifa, rid);
- if (m && (m->state == NEIGHBOR_FULL))
- return new_nexthop(po, m->ip, ifa->iface, ifa->ecmp_weight);
- }
-
- return NULL;
+ struct ospf_neighbor *m = find_neigh(ifa, rid);
+ if (!m || (m->state != NEIGHBOR_FULL))
+ return NULL;
+
+ return new_nexthop(po, m->ip, ifa->iface, ifa->ecmp_weight);
}
/* The third case - bcast or nbma neighbor */
@@ -1532,7 +1496,7 @@ merge_nexthops(struct proto_ospf *po, struct top_hash_entry *en,
/* Add LSA into list of candidates in Dijkstra's algorithm */
static void
add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
- u32 dist, struct ospf_area *oa, struct ospf_lsa_rt_link *rtl)
+ u32 dist, struct ospf_area *oa, int pos)
{
struct proto_ospf *po = oa->po;
node *prev, *n;
@@ -1566,7 +1530,7 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
if (!link_back(oa, en, par))
return;
- struct mpnh *nhs = calc_next_hop(oa, en, par, rtl);
+ struct mpnh *nhs = calc_next_hop(oa, en, par, pos);
if (!nhs)
{
log(L_WARN "Cannot find next hop for LSA (Type: %04x, Id: %R, Rt: %R)",
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index dc6cd1dc..9e693e13 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -241,6 +241,8 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
if ((ifa->oa != oa) || (ifa->state == OSPF_IS_DOWN))
continue;
+ ifa->rt_pos_beg = i;
+
/* RFC2328 - 12.4.1.1-4 */
switch (ifa->type)
{
@@ -294,6 +296,8 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
break;
}
+ ifa->rt_pos_end = i;
+
/* Now we will originate stub area if there is no primary */
if (net_lsa ||
(ifa->type == OSPF_IT_VLINK) ||
@@ -321,6 +325,8 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
ln->padding = 0;
}
i++;
+
+ ifa->rt_pos_end = i;
}
struct ospf_stubnet_config *sn;
@@ -367,6 +373,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
struct proto_ospf *po = oa->po;
struct ospf_iface *ifa;
int bitv = 0;
+ int i = 0;
struct ospf_lsa_rt *rt;
struct ospf_neighbor *neigh;
@@ -396,6 +403,8 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
if ((ifa->oa != oa) || (ifa->state == OSPF_IS_DOWN))
continue;
+ ifa->rt_pos_beg = i;
+
/* RFC5340 - 4.4.3.2 */
switch (ifa->type)
{
@@ -403,25 +412,27 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
case OSPF_IT_PTMP:
WALK_LIST(neigh, ifa->neigh_list)
if (neigh->state == NEIGHBOR_FULL)
- add_lsa_rt_link(po, ifa, LSART_PTP, neigh->iface_id, neigh->rid);
+ add_lsa_rt_link(po, ifa, LSART_PTP, neigh->iface_id, neigh->rid), i++;
break;
case OSPF_IT_BCAST:
case OSPF_IT_NBMA:
if (bcast_net_active(ifa))
- add_lsa_rt_link(po, ifa, LSART_NET, ifa->dr_iface_id, ifa->drid);
+ add_lsa_rt_link(po, ifa, LSART_NET, ifa->dr_iface_id, ifa->drid), i++;
break;
case OSPF_IT_VLINK:
neigh = (struct ospf_neighbor *) HEAD(ifa->neigh_list);
if ((!EMPTY_LIST(ifa->neigh_list)) && (neigh->state == NEIGHBOR_FULL) && (ifa->cost <= 0xffff))
- add_lsa_rt_link(po, ifa, LSART_VLNK, neigh->iface_id, neigh->rid);
+ add_lsa_rt_link(po, ifa, LSART_VLNK, neigh->iface_id, neigh->rid), i++;
break;
default:
log("Unknown interface type %s", ifa->iface->name);
break;
}
+
+ ifa->rt_pos_end = i;
}
if (bitv)
@@ -1184,6 +1195,8 @@ originate_prefix_rt_lsa_body(struct ospf_area *oa, u16 *length)
if ((ifa->oa != oa) || (ifa->state == OSPF_IS_DOWN))
continue;
+ ifa->px_pos_beg = i;
+
if ((ifa->type == OSPF_IT_BCAST) ||
(ifa->type == OSPF_IT_NBMA))
net_lsa = bcast_net_active(ifa);
@@ -1215,6 +1228,8 @@ originate_prefix_rt_lsa_body(struct ospf_area *oa, u16 *length)
(a->pxlen == MAX_PREFIX_LENGTH))
host_addr = 1;
}
+
+ ifa->px_pos_end = i;
}
/* If there are some configured vlinks, add some global address,
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 16:35:09 +0000