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-rw-r--r--proto/ospf/packet.c71
1 files changed, 59 insertions, 12 deletions
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index 783d28e..e3a3115 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -24,21 +24,37 @@ ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
pkt->routerid = htonl(p->cf->global->router_id);
pkt->areaid = htonl(ifa->oa->areaid);
+
+#ifdef OSPFv3
+ pkt->instance_id = ifa->instance_id;
+#endif
+
+#ifdef OSPFv2
pkt->autype = htons(ifa->autype);
+#endif
+
pkt->checksum = 0;
}
unsigned
ospf_pkt_maxsize(struct ospf_iface *ifa)
{
+ /* For virtual links use mtu=576, can be mtu < 576? */
unsigned mtu = (ifa->type == OSPF_IT_VLINK) ? OSPF_VLINK_MTU : ifa->iface->mtu;
- /* Can be mtu < 576? */
+ unsigned add = 0;
+
+#ifdef OSPFv2
+ add = ((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
+#endif
+
return ((mtu <= ifa->iface->mtu) ? mtu : ifa->iface->mtu) -
- SIZE_OF_IP_HEADER - ((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
- /* For virtual links use mtu=576 */
+ SIZE_OF_IP_HEADER - add;
}
-void
+
+#ifdef OSPFv2
+
+static void
ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
{
struct password_item *passwd = NULL;
@@ -224,6 +240,20 @@ ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_
}
}
+#else
+
+/* OSPFv3 authentication not yet supported */
+
+static inline void
+ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
+{ }
+
+static int
+ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_packet *pkt, int size)
+{ return 1; }
+
+#endif
+
/**
* ospf_rx_hook
* @sk: socket we received the packet. Its ignored.
@@ -290,6 +320,8 @@ ospf_rx_hook(sock * sk, int size)
return 1;
}
+ /* FIXME - handle checksums in OSPFv3 */
+#ifdef OSPFv2
if ((ps->autype != htons(OSPF_AUTH_CRYPT)) &&
(!ipsum_verify(ps, 16, (void *) ps + sizeof(struct ospf_packet),
ntohs(ps->length) - sizeof(struct ospf_packet), NULL)))
@@ -297,13 +329,23 @@ ospf_rx_hook(sock * sk, int size)
log(L_ERR "%s%I - bad checksum", mesg, sk->faddr);
return 1;
}
+#endif
if (ntohl(ps->areaid) != ifa->oa->areaid)
{
- log(L_ERR "%s%I - different area %ld", mesg, sk->faddr, ntohl(ps->areaid));
+ log(L_ERR "%s%I - different area (%u)", mesg, sk->faddr, ntohl(ps->areaid));
return 1;
}
+ /* FIXME - handling of instance id should be better */
+#ifdef OSPFv3
+ if (ps->instance_id != ifa->instance_id)
+ {
+ log(L_ERR "%s%I - different instance (%u)", mesg, sk->faddr, ps->instance_id);
+ return 1;
+ }
+#endif
+
if (ntohl(ps->routerid) == p->cf->global->router_id)
{
log(L_ERR "%s%I - received my own router ID!", mesg, sk->faddr);
@@ -352,23 +394,23 @@ ospf_rx_hook(sock * sk, int size)
{
case HELLO_P:
DBG("%s: Hello received.\n", p->name);
- ospf_hello_receive((struct ospf_hello_packet *) ps, ifa, n, sk->faddr);
+ ospf_hello_receive(ps, ifa, n, sk->faddr);
break;
case DBDES_P:
DBG("%s: Database description received.\n", p->name);
- ospf_dbdes_receive((struct ospf_dbdes_packet *) ps, ifa, n);
+ ospf_dbdes_receive(ps, ifa, n);
break;
case LSREQ_P:
DBG("%s: Link state request received.\n", p->name);
- ospf_lsreq_receive((struct ospf_lsreq_packet *) ps, ifa, n);
+ ospf_lsreq_receive(ps, ifa, n);
break;
case LSUPD_P:
DBG("%s: Link state update received.\n", p->name);
- ospf_lsupd_receive((struct ospf_lsupd_packet *) ps, ifa, n);
+ ospf_lsupd_receive(ps, ifa, n);
break;
case LSACK_P:
DBG("%s: Link state ack received.\n", p->name);
- ospf_lsack_receive((struct ospf_lsack_packet *) ps, ifa, n);
+ ospf_lsack_receive(ps, ifa, n);
break;
default:
log(L_ERR "%s%I - wrong type %u", mesg, sk->faddr, ps->type);
@@ -416,9 +458,14 @@ void
ospf_send_to(sock *sk, ip_addr ip, struct ospf_iface *ifa)
{
struct ospf_packet *pkt = (struct ospf_packet *) sk->tbuf;
- int len = ntohs(pkt->length) + ((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
- ospf_pkt_finalize(ifa, pkt);
+ int len = ntohs(pkt->length);
+#ifdef OSPFv2
+ if (ifa->autype == OSPF_AUTH_CRYPT)
+ len += OSPF_AUTH_CRYPT_SIZE;
+#endif
+
+ ospf_pkt_finalize(ifa, pkt);
if (sk->tbuf != sk->tpos)
log(L_ERR "Aiee, old packet was overwritted in TX buffer");