static void ospf_dump_dbdes(struct ospf_proto *p, struct ospf_packet *pkt)
{
struct ospf_lsa_header *lsas;
uint i, lsa_count;
u32 pkt_ddseq;
u16 pkt_iface_mtu;
u8 pkt_imms;
ASSERT(pkt->type == DBDES_P);
ospf_dump_common(p, pkt);
if (ospf_is_v2(p)) {
struct ospf_dbdes2_packet *ps = (void *)pkt;
pkt_iface_mtu = ntohs(ps->iface_mtu);
pkt_imms = ps->imms;
pkt_ddseq = ntohl(ps->ddseq);
} else { /* OSPFv3 */
struct ospf_dbdes3_packet *ps = (void *)pkt;
pkt_iface_mtu = ntohs(ps->iface_mtu);
pkt_imms = ps->imms;
pkt_ddseq = ntohl(ps->ddseq);
}
log(L_TRACE "%s: mtu %u", p->p.name, pkt_iface_mtu);
log(L_TRACE "%s: imms %s%s%s", p->p.name,
(pkt_imms & DBDES_I) ? "I " : "",
(pkt_imms & DBDES_M) ? "M " : "",
(pkt_imms & DBDES_MS) ? "MS" : "");
log(L_TRACE "%s: ddseq %u", p->p.name, pkt_ddseq);
ospf_dbdes_body(p, pkt, &lsas, &lsa_count);
for (i = 0; i < lsa_count; i++)
ospf_dump_lsahdr(p, lsas + i);
}
static void
ospf_prepare_dbdes(struct ospf_proto *p, struct ospf_neighbor *n)
{
struct ospf_iface *ifa = n->ifa;
struct ospf_packet *pkt;
uint length;
u16 iface_mtu = (ifa->type == OSPF_IT_VLINK) ? 0 : ifa->iface->mtu;
/* Update DBDES buffer */
if (n->ldd_bsize != ifa->tx_length)
{
mb_free(n->ldd_buffer);
n->ldd_buffer = mb_allocz(n->pool, ifa->tx_length);
n->ldd_bsize = ifa->tx_length;
}
pkt = n->ldd_buffer;
ospf_pkt_fill_hdr(ifa, pkt, DBDES_P);
if (ospf_is_v2(p))
{
struct ospf_dbdes2_packet *ps = (void *) pkt;
ps->iface_mtu = htons(iface_mtu);
ps->options = ifa->oa->options;
ps->imms = 0; /* Will be set later */
ps->ddseq = htonl(n->dds);
length = sizeof(struct ospf_dbdes2_packet);
}
else /* OSPFv3 */
{
struct ospf_dbdes3_packet *ps = (void *) pkt;
ps->options = htonl(ifa->oa->options);
ps->iface_mtu = htons(iface_mtu);
ps->padding = 0;
ps->imms = 0; /* Will be set later */
ps->ddseq = htonl(n->dds);
length = sizeof(struct ospf_dbdes3_packet);
}
/* Prepare DBDES body */
if (!(n->myimms & DBDES_I) && (n->myimms & DBDES_M))
{
struct ospf_lsa_header *lsas;
struct top_hash_entry *en;
uint i = 0, lsa_max;
ospf_dbdes_body(p, pkt, &lsas, &lsa_max);
en = (void *) s_get(&(n->dbsi));
while (i < lsa_max)
{
if (!SNODE_VALID(en))
{
n->myimms &= ~DBDES_M; /* Unset More bit */
break;
}
if ((en->lsa.age < LSA_MAXAGE) &&
lsa_flooding_allowed(en->lsa_type, en->domain, ifa))
{
lsa_hton_hdr(&(en->lsa), lsas + i);
i++;
}
en = SNODE_NEXT(en);
}
s_put(&(n->dbsi), SNODE en);
length += i * sizeof(struct ospf_lsa_header);
}
if (ospf_is_v2(p))
((struct ospf_dbdes2_packet *) pkt)->imms = n->myimms;
else
((struct ospf_dbdes3_packet *) pkt)->imms = n->myimms;
pkt->length = htons(length);
}
static int
ospf_process_dbdes(struct ospf_proto *p, struct ospf_packet *pkt, struct ospf_neighbor *n)
{
struct ospf_iface *ifa = n->ifa;
struct ospf_lsa_header *lsas, lsa;
struct top_hash_entry *en, *req;
const char *err_dsc = NULL;
u32 lsa_type, lsa_domain;
uint i, lsa_count;
ospf_dbdes_body(p, pkt, &lsas, &lsa_count);
for (i = 0; i < lsa_count; i++)
{
lsa_ntoh_hdr(lsas + i, &lsa);
lsa_get_type_domain(&lsa, ifa, &lsa_type, &lsa_domain);
/* RFC 2328 10.6 and RFC 5340 4.2.2 */
if (!lsa_type)
DROP1("LSA of unknown type");
if (!oa_is_ext(ifa->oa) && (LSA_SCOPE(lsa_type) == LSA_SCOPE_AS))
DROP1("LSA with AS scope in stub area");
/* Errata 3746 to RFC 2328 - rt-summary-LSAs forbidden in stub areas */
if (!oa_is_ext(ifa->oa) && (lsa_type == LSA_T_SUM_RT))
DROP1("rt-summary-LSA in stub area");
/* Not explicitly mentioned in RFC 5340 4.2.2 but makes sense */
if (LSA_SCOPE(lsa_type) == LSA_SCOPE_RES)
DROP1("LSA with invalid scope");
en = ospf_hash_find(p->gr, lsa_domain, lsa.id, lsa.rt, lsa_type);
if (!en || (lsa_comp(&lsa, &(en->lsa)) == CMP_NEWER))
{
/* This should be splitted to ospf_lsa_lsrq_up() */
req = ospf_hash_get(n->lsrqh, lsa_domain, lsa.id, lsa.rt, lsa_type);
if (!SNODE_VALID(req))
s_add_tail(&n->lsrql, SNODE req);
if (!SNODE_VALID(n->lsrqi))
n->lsrqi = req;
req->lsa = lsa;
req->lsa_body = LSA_BODY_DUMMY;
if (!tm_active(n->lsrq_timer))
tm_start(n->lsrq_timer, 0);
}
}
return 0;
drop:
LOG_LSA1("Bad LSA (Type: %04x, Id: %R, Rt: %R) in DBDES", lsa_type, lsa.id, lsa.rt);
LOG_LSA2(" received from nbr %R on %s - %s", n->rid, ifa->ifname, err_dsc);
ospf_neigh_sm(n, INM_SEQMIS);
return -1;
}