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-rw-r--r--proto/ospf/ospf.h4
-rw-r--r--proto/ospf/packet.c7
-rw-r--r--proto/ospf/rt.c49
3 files changed, 44 insertions, 16 deletions
diff --git a/proto/ospf/ospf.h b/proto/ospf/ospf.h
index 74a8e316..664bc48f 100644
--- a/proto/ospf/ospf.h
+++ b/proto/ospf/ospf.h
@@ -587,6 +587,10 @@ lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
if (pxl > 96)
_I3(*addr) = *buf++;
+ /* Clean up remaining bits */
+ if (pxl < 128)
+ addr->addr[pxl / 32] &= u32_mkmask(pxl % 32);
+
return buf;
}
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index ae9f862a..3cda3845 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -269,9 +269,10 @@ ospf_rx_hook(sock *sk, int size)
struct proto_ospf *po = ifa->oa->po;
// struct proto *p = &po->proto;
- int src_local = ipa_in_net(sk->faddr, ifa->addr->prefix, ifa->addr->pxlen);
- int dst_local = ipa_equal(sk->laddr, ifa->addr->ip);
- int dst_mcast = ipa_equal(sk->laddr, AllSPFRouters) || ipa_equal(sk->laddr, AllDRouters);
+ int src_local, dst_local UNUSED, dst_mcast;
+ src_local = ipa_in_net(sk->faddr, ifa->addr->prefix, ifa->addr->pxlen);
+ dst_local = ipa_equal(sk->laddr, ifa->addr->ip);
+ dst_mcast = ipa_equal(sk->laddr, AllSPFRouters) || ipa_equal(sk->laddr, AllDRouters);
#ifdef OSPFv2
/* First, we eliminate packets with strange address combinations.
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 2f9fe493..9e3f9d7a 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -245,6 +245,13 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_
.nhs = en->nhs
};
+ if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH)
+ {
+ log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)",
+ oa->po->proto.name, en->lsa.type, en->lsa.id, en->lsa.rt);
+ return;
+ }
+
if (en == oa->rt)
{
/*
@@ -336,7 +343,8 @@ 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;
- int i;
+ ip_addr prefix UNUSED;
+ int pxlen UNUSED, i;
struct ospf_lsa_rt *rt = en->lsa_body;
struct ospf_lsa_rt_link *rr = (struct ospf_lsa_rt_link *) (rt + 1);
@@ -357,9 +365,9 @@ ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct to
* the same result by handing them here because add_network()
* will keep the best (not the first) found route.
*/
- add_network(oa, ipa_from_u32(rtl->id),
- ipa_mklen(ipa_from_u32(rtl->data)),
- act->dist + rtl->metric, act, i);
+ prefix = ipa_from_u32(rtl->id & rtl->data);
+ pxlen = ipa_mklen(ipa_from_u32(rtl->data));
+ add_network(oa, prefix, pxlen, act->dist + rtl->metric, act, i);
break;
#endif
@@ -398,6 +406,8 @@ ospf_rt_spfa(struct ospf_area *oa)
struct ospf_lsa_rt *rt;
struct ospf_lsa_net *ln;
struct top_hash_entry *act, *tmp;
+ ip_addr prefix UNUSED;
+ int pxlen UNUSED;
u32 i, *rts;
node *n;
@@ -470,8 +480,9 @@ ospf_rt_spfa(struct ospf_area *oa)
ln = act->lsa_body;
#ifdef OSPFv2
- add_network(oa, ipa_and(ipa_from_u32(act->lsa.id), ln->netmask),
- ipa_mklen(ln->netmask), act->dist, act, -1);
+ prefix = ipa_and(ipa_from_u32(act->lsa.id), ln->netmask);
+ pxlen = ipa_mklen(ln->netmask);
+ add_network(oa, prefix, pxlen, act->dist, act, -1);
#endif
rts = (u32 *) (ln + 1);
@@ -618,8 +629,8 @@ ospf_rt_sum(struct ospf_area *oa)
{
#ifdef OSPFv2
struct ospf_lsa_sum *ls = en->lsa_body;
- pxlen = ipa_mklen(ls->netmask);
ip = ipa_and(ipa_from_u32(en->lsa.id), ls->netmask);
+ pxlen = ipa_mklen(ls->netmask);
#else /* OSPFv3 */
u8 pxopts;
u16 rest;
@@ -630,6 +641,13 @@ ospf_rt_sum(struct ospf_area *oa)
continue;
#endif
+ if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH)
+ {
+ log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)",
+ p->name, en->lsa.type, en->lsa.id, en->lsa.rt);
+ continue;
+ }
+
metric = ls->metric & METRIC_MASK;
options = 0;
type = ORT_NET;
@@ -695,7 +713,7 @@ ospf_rt_sum(struct ospf_area *oa)
static void
ospf_rt_sum_tr(struct ospf_area *oa)
{
- // struct proto *p = &oa->po->proto;
+ struct proto *p = &oa->po->proto;
struct proto_ospf *po = oa->po;
struct ospf_area *bb = po->backbone;
ip_addr abrip;
@@ -728,8 +746,8 @@ ospf_rt_sum_tr(struct ospf_area *oa)
int pxlen;
#ifdef OSPFv2
struct ospf_lsa_sum *ls = en->lsa_body;
- pxlen = ipa_mklen(ls->netmask);
ip = ipa_and(ipa_from_u32(en->lsa.id), ls->netmask);
+ pxlen = ipa_mklen(ls->netmask);
#else /* OSPFv3 */
u8 pxopts;
u16 rest;
@@ -740,6 +758,13 @@ ospf_rt_sum_tr(struct ospf_area *oa)
continue;
#endif
+ if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH)
+ {
+ log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)",
+ p->name, en->lsa.type, en->lsa.id, en->lsa.rt);
+ continue;
+ }
+
metric = ls->metric & METRIC_MASK;
re = fib_find(&po->rtf, &ip, pxlen);
}
@@ -1139,9 +1164,9 @@ ospf_ext_spf(struct proto_ospf *po)
rt_tag = 0;
#endif
- if (pxlen < 0)
+ if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH)
{
- log(L_WARN "%s: Invalid mask in LSA (Type: %04x, Id: %R, Rt: %R)",
+ log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)",
p->name, en->lsa.type, en->lsa.id, en->lsa.rt);
continue;
}
@@ -1703,8 +1728,6 @@ again1:
e->net = ne;
e->pref = p->preference;
-
-
DBG("Mod rte type %d - %I/%d via %I on iface %s, met %d\n",
a0.source, nf->fn.prefix, nf->fn.pxlen, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1);
rte_update(p->table, ne, p, p, e);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 11:05:08 +0000