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Merge commit '938742decc6e1d6d3a0375dd012b75172e747bbc' into haugesund

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This commit is contained in:
Maria Matejka
2022-06-08 15:31:28 +02:00
parent cae5979871 938742decc
commit 4364ee9b6f
27 changed files with 337 additions and 503 deletions
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85
proto/bgp/attrs.c
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@@ -374,26 +374,24 @@ bgp_aigp_set_metric(struct linpool *pool, const struct adata *ad, u64 metric)
int
bgp_total_aigp_metric_(const rte *e, u64 *metric, const struct adata **ad)
{
rta *a = e->attrs;
eattr *ea = ea_find(a->eattrs, BGP_EA_ID(BA_AIGP));
if (!ea)
eattr *a = ea_find(e->attrs, BGP_EA_ID(BA_AIGP));
if (!a)
return 0;
const byte *b = bgp_aigp_get_tlv(ea->u.ptr, BGP_AIGP_METRIC);
const byte *b = bgp_aigp_get_tlv(a->u.ptr, BGP_AIGP_METRIC);
if (!b)
return 0;
u64 aigp = get_u64(b + 3);
u64 step = rt_get_igp_metric(e);
if (!rta_resolvable(a) || (step >= IGP_METRIC_UNKNOWN))
if (!rte_resolvable(e) || (step >= IGP_METRIC_UNKNOWN))
step = BGP_AIGP_MAX;
if (!step)
step = 1;
*ad = ea->u.ptr;
*ad = a->u.ptr;
*metric = aigp + step;
if (*metric < aigp)
*metric = BGP_AIGP_MAX;
@@ -1494,13 +1492,13 @@ loop:
}
void
bgp_finish_attrs(struct bgp_parse_state *s, rta *a)
bgp_finish_attrs(struct bgp_parse_state *s, ea_list **to)
{
/* AIGP test here instead of in bgp_decode_aigp() - we need to know channel */
if (BIT32_TEST(s->attrs_seen, BA_AIGP) && !s->channel->cf->aigp)
{
REPORT("Discarding AIGP attribute received on non-AIGP session");
bgp_unset_attr(&a->eattrs, BA_AIGP);
bgp_unset_attr(to, BA_AIGP);
}
}
@@ -1739,14 +1737,14 @@ bgp_preexport(struct channel *c, rte *e)
/* Generally, this should be handled when path is received, but we check it
also here as rr_cluster_id may be undefined or different in src. */
if (p->rr_cluster_id && bgp_cluster_list_loopy(p, e->attrs->eattrs))
if (p->rr_cluster_id && bgp_cluster_list_loopy(p, e->attrs))
return -1;
}
/* Handle well-known communities, RFC 1997 */
struct eattr *com;
if (p->cf->interpret_communities &&
(com = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY))))
(com = ea_find(e->attrs, BGP_EA_ID(BA_COMMUNITY))))
{
const struct adata *d = com->u.ptr;
@@ -1897,7 +1895,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, const net_addr *n, rte *new, c
if (new)
{
struct ea_list *attrs = bgp_update_attrs(p, c, new, new->attrs->eattrs, tmp_linpool);
struct ea_list *attrs = bgp_update_attrs(p, c, new, new->attrs, tmp_linpool);
/* Error during attribute processing */
if (!attrs)
@@ -1923,7 +1921,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, const net_addr *n, rte *new, c
static inline u32
bgp_get_neighbor(rte *r)
{
eattr *e = ea_find(r->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
eattr *e = ea_find(r->attrs, BGP_EA_ID(BA_AS_PATH));
u32 as;
if (e && as_path_get_first_regular(e->u.ptr, &as))
@@ -1944,7 +1942,7 @@ rte_stale(rte *r)
return 0;
/* If staleness is unknown, compute and cache it */
eattr *a = ea_find(r->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY));
eattr *a = ea_find(r->attrs, BGP_EA_ID(BA_COMMUNITY));
if (a && int_set_contains(a->u.ptr, BGP_COMM_LLGR_STALE))
{
r->pflags |= BGP_REF_STALE;
@@ -1974,8 +1972,8 @@ bgp_rte_better(rte *new, rte *old)
return 1;
/* RFC 4271 9.1.2.1. Route resolvability test */
n = rta_resolvable(new->attrs);
o = rta_resolvable(old->attrs);
n = rte_resolvable(new);
o = rte_resolvable(old);
if (n > o)
return 1;
if (n < o)
@@ -1990,8 +1988,8 @@ bgp_rte_better(rte *new, rte *old)
return 1;
/* Start with local preferences */
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_LOCAL_PREF));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_LOCAL_PREF));
x = ea_find(new->attrs, BGP_EA_ID(BA_LOCAL_PREF));
y = ea_find(old->attrs, BGP_EA_ID(BA_LOCAL_PREF));
n = x ? x->u.data : new_bgp->cf->default_local_pref;
o = y ? y->u.data : old_bgp->cf->default_local_pref;
if (n > o)
@@ -2010,8 +2008,8 @@ bgp_rte_better(rte *new, rte *old)
/* RFC 4271 9.1.2.2. a) Use AS path lengths */
if (new_bgp->cf->compare_path_lengths || old_bgp->cf->compare_path_lengths)
{
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
x = ea_find(new->attrs, BGP_EA_ID(BA_AS_PATH));
y = ea_find(old->attrs, BGP_EA_ID(BA_AS_PATH));
n = x ? as_path_getlen(x->u.ptr) : AS_PATH_MAXLEN;
o = y ? as_path_getlen(y->u.ptr) : AS_PATH_MAXLEN;
if (n < o)
@@ -2021,8 +2019,8 @@ bgp_rte_better(rte *new, rte *old)
}
/* RFC 4271 9.1.2.2. b) Use origins */
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_ORIGIN));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_ORIGIN));
x = ea_find(new->attrs, BGP_EA_ID(BA_ORIGIN));
y = ea_find(old->attrs, BGP_EA_ID(BA_ORIGIN));
n = x ? x->u.data : ORIGIN_INCOMPLETE;
o = y ? y->u.data : ORIGIN_INCOMPLETE;
if (n < o)
@@ -2044,8 +2042,8 @@ bgp_rte_better(rte *new, rte *old)
if (new_bgp->cf->med_metric || old_bgp->cf->med_metric ||
(bgp_get_neighbor(new) == bgp_get_neighbor(old)))
{
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
x = ea_find(new->attrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
y = ea_find(old->attrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
n = x ? x->u.data : new_bgp->cf->default_med;
o = y ? y->u.data : old_bgp->cf->default_med;
if (n < o)
@@ -2070,8 +2068,8 @@ bgp_rte_better(rte *new, rte *old)
/* RFC 4271 9.1.2.2. f) Compare BGP identifiers */
/* RFC 4456 9. a) Use ORIGINATOR_ID instead of local neighbor ID */
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_ORIGINATOR_ID));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_ORIGINATOR_ID));
x = ea_find(new->attrs, BGP_EA_ID(BA_ORIGINATOR_ID));
y = ea_find(old->attrs, BGP_EA_ID(BA_ORIGINATOR_ID));
n = x ? x->u.data : new_bgp->remote_id;
o = y ? y->u.data : old_bgp->remote_id;
@@ -2088,8 +2086,8 @@ bgp_rte_better(rte *new, rte *old)
return 0;
/* RFC 4456 9. b) Compare cluster list lengths */
x = ea_find(new->attrs->eattrs, BGP_EA_ID(BA_CLUSTER_LIST));
y = ea_find(old->attrs->eattrs, BGP_EA_ID(BA_CLUSTER_LIST));
x = ea_find(new->attrs, BGP_EA_ID(BA_CLUSTER_LIST));
y = ea_find(old->attrs, BGP_EA_ID(BA_CLUSTER_LIST));
n = x ? int_set_get_size(x->u.ptr) : 0;
o = y ? int_set_get_size(y->u.ptr) : 0;
if (n < o)
@@ -2115,7 +2113,7 @@ bgp_rte_mergable(rte *pri, rte *sec)
return 0;
/* RFC 4271 9.1.2.1. Route resolvability test */
if (rta_resolvable(pri->attrs) != rta_resolvable(sec->attrs))
if (rte_resolvable(pri) != rte_resolvable(sec))
return 0;
/* LLGR draft - depreference stale routes */
@@ -2123,8 +2121,8 @@ bgp_rte_mergable(rte *pri, rte *sec)
return 0;
/* Start with local preferences */
x = ea_find(pri->attrs->eattrs, BGP_EA_ID(BA_LOCAL_PREF));
y = ea_find(sec->attrs->eattrs, BGP_EA_ID(BA_LOCAL_PREF));
x = ea_find(pri->attrs, BGP_EA_ID(BA_LOCAL_PREF));
y = ea_find(sec->attrs, BGP_EA_ID(BA_LOCAL_PREF));
p = x ? x->u.data : pri_bgp->cf->default_local_pref;
s = y ? y->u.data : sec_bgp->cf->default_local_pref;
if (p != s)
@@ -2133,8 +2131,8 @@ bgp_rte_mergable(rte *pri, rte *sec)
/* RFC 4271 9.1.2.2. a) Use AS path lengths */
if (pri_bgp->cf->compare_path_lengths || sec_bgp->cf->compare_path_lengths)
{
x = ea_find(pri->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
y = ea_find(sec->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
x = ea_find(pri->attrs, BGP_EA_ID(BA_AS_PATH));
y = ea_find(sec->attrs, BGP_EA_ID(BA_AS_PATH));
p = x ? as_path_getlen(x->u.ptr) : AS_PATH_MAXLEN;
s = y ? as_path_getlen(y->u.ptr) : AS_PATH_MAXLEN;
@@ -2146,8 +2144,8 @@ bgp_rte_mergable(rte *pri, rte *sec)
}
/* RFC 4271 9.1.2.2. b) Use origins */
x = ea_find(pri->attrs->eattrs, BGP_EA_ID(BA_ORIGIN));
y = ea_find(sec->attrs->eattrs, BGP_EA_ID(BA_ORIGIN));
x = ea_find(pri->attrs, BGP_EA_ID(BA_ORIGIN));
y = ea_find(sec->attrs, BGP_EA_ID(BA_ORIGIN));
p = x ? x->u.data : ORIGIN_INCOMPLETE;
s = y ? y->u.data : ORIGIN_INCOMPLETE;
if (p != s)
@@ -2157,8 +2155,8 @@ bgp_rte_mergable(rte *pri, rte *sec)
if (pri_bgp->cf->med_metric || sec_bgp->cf->med_metric ||
(bgp_get_neighbor(pri) == bgp_get_neighbor(sec)))
{
x = ea_find(pri->attrs->eattrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
y = ea_find(sec->attrs->eattrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
x = ea_find(pri->attrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
y = ea_find(sec->attrs, BGP_EA_ID(BA_MULTI_EXIT_DISC));
p = x ? x->u.data : pri_bgp->cf->default_med;
s = y ? y->u.data : sec_bgp->cf->default_med;
if (p != s)
@@ -2323,7 +2321,7 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
rte *
bgp_rte_modify_stale(struct rte *r, struct linpool *pool)
{
eattr *ea = ea_find(r->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY));
eattr *ea = ea_find(r->attrs, BGP_EA_ID(BA_COMMUNITY));
const struct adata *ad = ea ? ea->u.ptr : NULL;
uint flags = ea ? ea->flags : BAF_PARTIAL;
@@ -2333,13 +2331,10 @@ bgp_rte_modify_stale(struct rte *r, struct linpool *pool)
if (ad && int_set_contains(ad, BGP_COMM_LLGR_STALE))
return r;
rta *a = rta_do_cow(r->attrs, pool);
_Thread_local static rte e0;
e0 = *r;
e0.attrs = a;
bgp_set_attr_ptr(&(a->eattrs), BA_COMMUNITY, flags,
bgp_set_attr_ptr(&e0.attrs, BA_COMMUNITY, flags,
int_set_add(pool, ad, BGP_COMM_LLGR_STALE));
e0.pflags |= BGP_REF_STALE;
@@ -2396,8 +2391,8 @@ bgp_process_as4_attrs(ea_list **attrs, struct linpool *pool)
void
bgp_get_route_info(rte *e, byte *buf)
{
eattr *p = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_AS_PATH));
eattr *o = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_ORIGIN));
eattr *p = ea_find(e->attrs, BGP_EA_ID(BA_AS_PATH));
eattr *o = ea_find(e->attrs, BGP_EA_ID(BA_ORIGIN));
u32 origas;
buf += bsprintf(buf, " (%d", rt_get_preference(e));
@@ -2417,7 +2412,7 @@ bgp_get_route_info(rte *e, byte *buf)
}
else if (metric = rt_get_igp_metric(e))
{
if (!rta_resolvable(e->attrs))
if (!rte_resolvable(e))
buf += bsprintf(buf, "/-");
else if (metric >= IGP_METRIC_UNKNOWN)
buf += bsprintf(buf, "/?");