mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 09:41:54 +00:00
Implements proper handling of summary/external LSA IDs.
This commit is contained in:
Ondrej Zajicek
parent
988992446d
commit
9727681a38
@ -644,7 +644,7 @@ update_net_lsa(struct ospf_iface *ifa)
|
||||
|
||||
#ifdef OSPFv2
|
||||
|
||||
static void *
|
||||
static inline void *
|
||||
originate_sum_lsa_body(struct proto_ospf *po, u16 *length, u32 mlen, u32 metric)
|
||||
{
|
||||
struct ospf_lsa_sum *sum = mb_alloc(po->proto.pool, sizeof(struct ospf_lsa_sum));
|
||||
@ -662,9 +662,23 @@ originate_sum_lsa_body(struct proto_ospf *po, u16 *length, u32 mlen, u32 metric)
|
||||
#define originate_sum_rt_lsa_body(po,length,drid,metric,options) \
|
||||
originate_sum_lsa_body(po, length, 0, metric)
|
||||
|
||||
static inline int
|
||||
check_sum_net_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en)
|
||||
{
|
||||
struct ospf_lsa_sum *sum = en->lsa_body;
|
||||
return (fn->pxlen != ipa_mklen(sum->netmask))
|
||||
}
|
||||
|
||||
static inline int
|
||||
check_ext_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en)
|
||||
{
|
||||
struct ospf_lsa_ext *ext = en->lsa_body;
|
||||
return (fn->pxlen != ipa_mklen(ext->netmask))
|
||||
}
|
||||
|
||||
#else /* OSPFv3 */
|
||||
|
||||
static void *
|
||||
static inline void *
|
||||
originate_sum_net_lsa_body(struct proto_ospf *po, u16 *length, struct fib_node *fn, u32 metric)
|
||||
{
|
||||
int size = sizeof(struct ospf_lsa_sum_net) + IPV6_PREFIX_SPACE(fn->pxlen);
|
||||
@ -677,7 +691,33 @@ originate_sum_net_lsa_body(struct proto_ospf *po, u16 *length, struct fib_node *
|
||||
return sum;
|
||||
}
|
||||
|
||||
static void *
|
||||
static inline int
|
||||
check_sum_net_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en)
|
||||
{
|
||||
struct ospf_lsa_sum_net *sum = en->lsa_body;
|
||||
ip_addr prefix;
|
||||
int pxlen;
|
||||
u8 pxopts;
|
||||
u16 rest;
|
||||
|
||||
lsa_get_ipv6_prefix(sum->prefix, &prefix, &pxlen, &pxopts, &rest);
|
||||
return (fn->pxlen != pxlen) || !ipa_equal(fn->prefix, prefix);
|
||||
}
|
||||
|
||||
static inline int
|
||||
check_ext_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en)
|
||||
{
|
||||
struct ospf_lsa_ext *ext = en->lsa_body;
|
||||
ip_addr prefix;
|
||||
int pxlen;
|
||||
u8 pxopts;
|
||||
u16 rest;
|
||||
|
||||
lsa_get_ipv6_prefix(ext->rest, &prefix, &pxlen, &pxopts, &rest);
|
||||
return (fn->pxlen != pxlen) || !ipa_equal(fn->prefix, prefix);
|
||||
}
|
||||
|
||||
static inline void *
|
||||
originate_sum_rt_lsa_body(struct proto_ospf *po, u16 *length, u32 drid, u32 metric, u32 options)
|
||||
{
|
||||
struct ospf_lsa_sum_rt *sum = mb_alloc(po->proto.pool, sizeof(struct ospf_lsa_sum_rt));
|
||||
@ -693,62 +733,90 @@ originate_sum_rt_lsa_body(struct proto_ospf *po, u16 *length, u32 drid, u32 metr
|
||||
#endif
|
||||
|
||||
void
|
||||
originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric, u32 options)
|
||||
originate_sum_net_lsa(struct ospf_area *oa, struct fib_node *fn, int metric)
|
||||
{
|
||||
struct proto_ospf *po = oa->po;
|
||||
struct proto *p = &po->proto;
|
||||
struct top_hash_entry *en;
|
||||
u32 rid = po->proto.cf->global->router_id;
|
||||
u32 dom = oa->areaid;
|
||||
struct ospf_lsa_header lsa;
|
||||
void *body;
|
||||
|
||||
/* options argument is used in ORT_NET and OSPFv3 only */
|
||||
OSPF_TRACE(D_EVENTS, "Originating net-summary-LSA for %I/%d (metric %d)",
|
||||
fn->prefix, fn->pxlen, metric);
|
||||
|
||||
/* options argument is used in ORT_NET and OSPFv3 only */
|
||||
lsa.age = 0;
|
||||
lsa.rt = rid;
|
||||
lsa.sn = LSA_INITSEQNO;
|
||||
#ifdef OSPFv2
|
||||
lsa.options = oa->options;
|
||||
#endif
|
||||
lsa.type = LSA_T_SUM_NET;
|
||||
lsa.id = fibnode_to_lsaid(po, fn);
|
||||
lsa.rt = rid;
|
||||
lsa.sn = LSA_INITSEQNO;
|
||||
|
||||
if (type == ORT_NET)
|
||||
{
|
||||
lsa.id = fibnode_to_lsaid(po, fn);
|
||||
lsa.type = LSA_T_SUM_NET;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* In OSPFv6, LSA ID is meaningless, but we still use Router ID of ASBR */
|
||||
lsa.id = ipa_to_rid(fn->prefix);
|
||||
lsa.type = LSA_T_SUM_RT;
|
||||
}
|
||||
if ((en = ospf_hash_find_header(po->gr, dom, &lsa)) != NULL)
|
||||
{
|
||||
if (check_sum_net_lsaid_collision(fn, en))
|
||||
{
|
||||
log(L_ERR, "%s: LSAID collision for %I/%d",
|
||||
p->name, fn->prefix, fn->pxlen);
|
||||
return;
|
||||
}
|
||||
|
||||
u32 dom = oa->areaid;
|
||||
|
||||
/* FIXME check for the same LSA */
|
||||
if ((en = ospf_hash_find_header(po->gr, oa->areaid, &lsa)) != NULL)
|
||||
lsa.sn = en->lsa.sn + 1;
|
||||
}
|
||||
|
||||
if (type == ORT_NET)
|
||||
{
|
||||
OSPF_TRACE(D_EVENTS, "Originating summary-LSA for %I/%d (metric %d)",
|
||||
fn->prefix, fn->pxlen, metric);
|
||||
|
||||
body = originate_sum_net_lsa_body(po, &lsa.length, fn, metric);
|
||||
}
|
||||
else
|
||||
{
|
||||
OSPF_TRACE(D_EVENTS, "Originating summary-LSA for %R (metric %d)",
|
||||
lsa.id, metric);
|
||||
|
||||
body = originate_sum_rt_lsa_body(po, &lsa.length, lsa.id, metric, options);
|
||||
}
|
||||
|
||||
body = originate_sum_net_lsa_body(po, &lsa.length, fn, metric);
|
||||
lsasum_calculate(&lsa, body);
|
||||
en = lsa_install_new(po, &lsa, dom, body);
|
||||
ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1);
|
||||
}
|
||||
|
||||
void
|
||||
originate_sum_rt_lsa(struct ospf_area *oa, struct fib_node *fn, int metric, u32 options)
|
||||
{
|
||||
struct proto_ospf *po = oa->po;
|
||||
struct proto *p = &po->proto;
|
||||
struct top_hash_entry *en;
|
||||
u32 rid = po->proto.cf->global->router_id;
|
||||
u32 dom = oa->areaid;
|
||||
struct ospf_lsa_header lsa;
|
||||
void *body;
|
||||
|
||||
OSPF_TRACE(D_EVENTS, "Originating rt-summary-LSA for %R (metric %d)",
|
||||
lsa.id, metric);
|
||||
|
||||
lsa.age = 0;
|
||||
#ifdef OSPFv2
|
||||
lsa.options = oa->options;
|
||||
#endif
|
||||
lsa.type = LSA_T_SUM_RT;
|
||||
/* In OSPFv3, LSA ID is meaningless, but we still use Router ID of ASBR */
|
||||
lsa.id = ipa_to_rid(fn->prefix);
|
||||
lsa.rt = rid;
|
||||
lsa.sn = LSA_INITSEQNO;
|
||||
|
||||
if ((en = ospf_hash_find_header(po->gr, dom, &lsa)) != NULL)
|
||||
lsa.sn = en->lsa.sn + 1;
|
||||
|
||||
body = originate_sum_rt_lsa_body(po, &lsa.length, lsa.id, metric, options);
|
||||
lsasum_calculate(&lsa, body);
|
||||
en = lsa_install_new(po, &lsa, dom, body);
|
||||
ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric, u32 options)
|
||||
{
|
||||
if (type == ORT_NET)
|
||||
originate_sum_net_lsa(oa, fn, metric);
|
||||
else
|
||||
originate_sum_rt_lsa(oa, fn, metric, options);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type)
|
||||
@ -767,15 +835,20 @@ flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type)
|
||||
}
|
||||
else
|
||||
{
|
||||
/* In OSPFv6, LSA ID is meaningless, but we still use Router ID of ASBR */
|
||||
/* In OSPFv3, LSA ID is meaningless, but we still use Router ID of ASBR */
|
||||
lsa.id = ipa_to_rid(fn->prefix);
|
||||
lsa.type = LSA_T_SUM_RT;
|
||||
}
|
||||
|
||||
/* FIXME check for the same network */
|
||||
|
||||
if ((en = ospf_hash_find_header(po->gr, oa->areaid, &lsa)) != NULL)
|
||||
{
|
||||
if ((type == ORT_NET) && check_sum_net_lsaid_collision(fn, en))
|
||||
{
|
||||
log(L_ERR, "%s: LSAID collision for %I/%d",
|
||||
p->name, fn->prefix, fn->pxlen);
|
||||
return;
|
||||
}
|
||||
|
||||
struct ospf_lsa_sum *sum = en->lsa_body;
|
||||
en->lsa.age = LSA_MAXAGE;
|
||||
en->lsa.sn = LSA_MAXSEQNO;
|
||||
@ -927,6 +1000,7 @@ originate_ext_lsa(net * n, rte * e, struct proto_ospf *po,
|
||||
struct ea_list *attrs)
|
||||
{
|
||||
struct proto *p = &po->proto;
|
||||
struct fib_node *fn = &n->n;
|
||||
struct ospf_lsa_header lsa;
|
||||
u32 rid = po->proto.cf->global->router_id;
|
||||
struct top_hash_entry *en = NULL;
|
||||
@ -934,21 +1008,26 @@ originate_ext_lsa(net * n, rte * e, struct proto_ospf *po,
|
||||
struct ospf_area *oa;
|
||||
|
||||
OSPF_TRACE(D_EVENTS, "Originating AS-external-LSA for %I/%d",
|
||||
n->n.prefix, n->n.pxlen);
|
||||
fn->prefix, fn->pxlen);
|
||||
|
||||
lsa.age = 0;
|
||||
lsa.type = LSA_T_EXT;
|
||||
lsa.rt = rid;
|
||||
lsa.sn = LSA_INITSEQNO;
|
||||
#ifdef OSPFv2
|
||||
lsa.options = 0; /* or oa->options ? */
|
||||
#endif
|
||||
|
||||
/* FIXME proper handling of LSA IDs and check for the same network */
|
||||
lsa.id = fibnode_to_lsaid(po, &n->n);
|
||||
lsa.type = LSA_T_EXT;
|
||||
lsa.id = fibnode_to_lsaid(po, fn);
|
||||
lsa.rt = rid;
|
||||
lsa.sn = LSA_INITSEQNO;
|
||||
|
||||
if ((en = ospf_hash_find_header(po->gr, 0, &lsa)) != NULL)
|
||||
{
|
||||
if (check_ext_lsaid_collision(fn, en))
|
||||
{
|
||||
log(L_ERR, "%s: LSAID collision for %I/%d",
|
||||
p->name, fn->prefix, fn->pxlen);
|
||||
return;
|
||||
}
|
||||
|
||||
lsa.sn = en->lsa.sn + 1;
|
||||
}
|
||||
|
||||
@ -972,23 +1051,26 @@ void
|
||||
flush_ext_lsa(net *n, struct proto_ospf *po)
|
||||
{
|
||||
struct proto *p = &po->proto;
|
||||
struct fib_node *fn = &n->n;
|
||||
u32 rid = po->proto.cf->global->router_id;
|
||||
struct ospf_area *oa;
|
||||
struct top_hash_entry *en;
|
||||
|
||||
OSPF_TRACE(D_EVENTS, "Flushing AS-external-LSA for %I/%d",
|
||||
n->n.prefix, n->n.pxlen);
|
||||
fn->prefix, fn->pxlen);
|
||||
|
||||
/* FIXME proper handling of LSA IDs and check for the same network */
|
||||
u32 lsaid = fibnode_to_lsaid(po, &n->n);
|
||||
u32 lsaid = fibnode_to_lsaid(po, fn);
|
||||
|
||||
if (en = ospf_hash_find(po->gr, 0, lsaid, rid, LSA_T_EXT))
|
||||
{
|
||||
/* FIXME this is nonsense */
|
||||
WALK_LIST(oa, po->area_list)
|
||||
if (check_ext_lsaid_collision(fn, en))
|
||||
{
|
||||
ospf_lsupd_flush_nlsa(po, en);
|
||||
log(L_ERR, "%s: LSAID collision for %I/%d",
|
||||
p->name, fn->prefix, fn->pxlen);
|
||||
return;
|
||||
}
|
||||
|
||||
ospf_lsupd_flush_nlsa(po, en);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user