diff options
Diffstat (limited to 'proto/bgp/attrs.c')
-rw-r--r-- | proto/bgp/attrs.c | 101 |
1 files changed, 54 insertions, 47 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c index 097ba9a2..6a91e6e7 100644 --- a/proto/bgp/attrs.c +++ b/proto/bgp/attrs.c @@ -372,26 +372,28 @@ bgp_aigp_set_metric(struct linpool *pool, const struct adata *ad, u64 metric) } int -bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad) +bgp_total_aigp_metric_(const rte *e, u64 *metric, const struct adata **ad) { - eattr *a = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_AIGP)); - if (!a) + rta *a = e->attrs; + + eattr *ea = ea_find(a->eattrs, BGP_EA_ID(BA_AIGP)); + if (!ea) return 0; - const byte *b = bgp_aigp_get_tlv(a->u.ptr, BGP_AIGP_METRIC); + const byte *b = bgp_aigp_get_tlv(ea->u.ptr, BGP_AIGP_METRIC); if (!b) return 0; u64 aigp = get_u64(b + 3); u64 step = rt_get_igp_metric(e); - if (!rte_resolvable(e) || (step >= IGP_METRIC_UNKNOWN)) + if (!rta_resolvable(a) || (step >= IGP_METRIC_UNKNOWN)) step = BGP_AIGP_MAX; if (!step) step = 1; - *ad = a->u.ptr; + *ad = ea->u.ptr; *metric = aigp + step; if (*metric < aigp) *metric = BGP_AIGP_MAX; @@ -411,7 +413,7 @@ bgp_init_aigp_metric(rte *e, u64 *metric, const struct adata **ad) } u32 -bgp_rte_igp_metric(struct rte *rt) +bgp_rte_igp_metric(const rte *rt) { u64 metric = bgp_total_aigp_metric(rt); return (u32) MIN(metric, (u64) IGP_METRIC_UNKNOWN); @@ -942,7 +944,7 @@ bgp_decode_large_community(struct bgp_parse_state *s, uint code UNUSED, uint fla static void bgp_export_mpls_label_stack(struct bgp_export_state *s, eattr *a) { - net_addr *n = s->route->net->n.addr; + const net_addr *n = s->route->net; u32 *labels = (u32 *) a->u.ptr->data; uint lnum = a->u.ptr->length / 4; @@ -1513,7 +1515,7 @@ bgp_finish_attrs(struct bgp_parse_state *s, rta *a) #define RBH_FN(a,h) h #define RBH_REHASH bgp_rbh_rehash -#define RBH_PARAMS /8, *2, 2, 2, 8, 20 +#define RBH_PARAMS /8, *2, 2, 2, 12, 20 HASH_DEFINE_REHASH_FN(RBH, struct bgp_bucket) @@ -1629,7 +1631,7 @@ bgp_withdraw_bucket(struct bgp_channel *c, struct bgp_bucket *b) #define PXH_FN(n,i,h) h #define PXH_REHASH bgp_pxh_rehash -#define PXH_PARAMS /8, *2, 2, 2, 8, 24 +#define PXH_PARAMS /8, *2, 2, 2, 12, 24 HASH_DEFINE_REHASH_FN(PXH, struct bgp_prefix) @@ -1653,9 +1655,10 @@ bgp_free_prefix_table(struct bgp_channel *c) } static struct bgp_prefix * -bgp_get_prefix(struct bgp_channel *c, net_addr *net, u32 path_id) +bgp_get_prefix(struct bgp_channel *c, const net_addr *net, u32 path_id) { - u32 hash = net_hash(net) ^ u32_hash(path_id); + /* We must use a different hash function than the rtable */ + u32 hash = u32_hash(net_hash(net) ^ u32_hash(path_id)); struct bgp_prefix *px = HASH_FIND(c->prefix_hash, PXH, net, path_id, hash); if (px) @@ -1697,10 +1700,10 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px) */ int -bgp_preexport(struct proto *P, rte *e) +bgp_preexport(struct channel *c, rte *e) { struct proto *SRC = e->src->proto; - struct bgp_proto *p = (struct bgp_proto *) P; + struct bgp_proto *p = (struct bgp_proto *) (c->proto); struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (struct bgp_proto *) SRC : NULL; /* Reject our routes */ @@ -1712,8 +1715,8 @@ bgp_preexport(struct proto *P, rte *e) return 0; /* Reject flowspec that failed validation */ - if ((e->attrs->dest == RTD_UNREACHABLE) && net_is_flow(e->net->n.addr)) - return -1; + if ((e->attrs->dest == RTD_UNREACHABLE) && net_is_flow(e->net)) + return -1; /* IBGP route reflection, RFC 4456 */ if (p->is_internal && src->is_internal && (p->local_as == src->local_as)) @@ -1729,11 +1732,11 @@ bgp_preexport(struct proto *P, rte *e) } /* Handle well-known communities, RFC 1997 */ - struct eattr *c; + struct eattr *com; if (p->cf->interpret_communities && - (c = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY)))) + (com = ea_find(e->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY)))) { - const struct adata *d = c->u.ptr; + const struct adata *d = com->u.ptr; /* Do not export anywhere */ if (int_set_contains(d, BGP_COMM_NO_ADVERTISE)) @@ -1872,7 +1875,7 @@ bgp_update_attrs(struct bgp_proto *p, struct bgp_channel *c, rte *e, ea_list *at } void -bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old) +bgp_rt_notify(struct proto *P, struct channel *C, const net_addr *n, rte *new, const rte *old) { struct bgp_proto *p = (void *) P; struct bgp_channel *c = (void *) C; @@ -1886,7 +1889,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old) /* Error during attribute processing */ if (!attrs) - log(L_ERR "%s: Invalid route %N withdrawn", p->p.name, n->n.addr); + log(L_ERR "%s: Invalid route %N withdrawn", p->p.name, n); /* If attributes are invalid, we fail back to withdraw */ buck = attrs ? bgp_get_bucket(c, attrs) : bgp_get_withdraw_bucket(c); @@ -1898,7 +1901,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old) path = old->src->global_id; } - px = bgp_get_prefix(c, n->n.addr, c->add_path_tx ? path : 0); + px = bgp_get_prefix(c, n, c->add_path_tx ? path : 0); add_tail(&buck->prefixes, &px->buck_node); bgp_schedule_packet(p->conn, c, PKT_UPDATE); @@ -1959,8 +1962,8 @@ bgp_rte_better(rte *new, rte *old) return 1; /* RFC 4271 9.1.2.1. Route resolvability test */ - n = rte_resolvable(new); - o = rte_resolvable(old); + n = rta_resolvable(new->attrs); + o = rta_resolvable(old->attrs); if (n > o) return 1; if (n < o) @@ -2100,7 +2103,7 @@ bgp_rte_mergable(rte *pri, rte *sec) return 0; /* RFC 4271 9.1.2.1. Route resolvability test */ - if (rte_resolvable(pri) != rte_resolvable(sec)) + if (rta_resolvable(pri->attrs) != rta_resolvable(sec->attrs)) return 0; /* LLGR draft - depreference stale routes */ @@ -2173,16 +2176,15 @@ same_group(rte *r, u32 lpref, u32 lasn) } static inline int -use_deterministic_med(rte *r) +use_deterministic_med(struct rte_storage *r) { - struct proto *P = r->src->proto; + struct proto *P = r->rte.src->proto; return (P->proto == &proto_bgp) && ((struct bgp_proto *) P)->cf->deterministic_med; } int bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) { - rte *r, *s; rte *key = new ? new : old; u32 lpref = rt_get_preference(key); u32 lasn = bgp_get_neighbor(key); @@ -2250,13 +2252,13 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) } /* The default case - find a new best-in-group route */ - r = new; /* new may not be in the list */ - for (s=net->routes; rte_is_valid(s); s=s->next) - if (use_deterministic_med(s) && same_group(s, lpref, lasn)) + rte *r = new; /* new may not be in the list */ + for (struct rte_storage *s = net->routes; rte_is_valid(RTE_OR_NULL(s)); s = s->next) + if (use_deterministic_med(s) && same_group(&s->rte, lpref, lasn)) { - s->pflags |= BGP_REF_SUPPRESSED; - if (!r || bgp_rte_better(s, r)) - r = s; + s->rte.pflags |= BGP_REF_SUPPRESSED; + if (!r || bgp_rte_better(&s->rte, r)) + r = &s->rte; } /* Simple case - the last route in group disappears */ @@ -2268,10 +2270,10 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) new->pflags &= ~BGP_REF_SUPPRESSED; /* Found all existing routes mergable with best-in-group */ - for (s=net->routes; rte_is_valid(s); s=s->next) - if (use_deterministic_med(s) && same_group(s, lpref, lasn)) - if ((s != r) && bgp_rte_mergable(r, s)) - s->pflags &= ~BGP_REF_SUPPRESSED; + for (struct rte_storage *s = net->routes; rte_is_valid(RTE_OR_NULL(s)); s = s->next) + if (use_deterministic_med(s) && same_group(&s->rte, lpref, lasn)) + if ((&s->rte != r) && bgp_rte_mergable(r, &s->rte)) + s->rte.pflags &= ~BGP_REF_SUPPRESSED; /* Found best-in-group */ r->pflags &= ~BGP_REF_SUPPRESSED; @@ -2306,12 +2308,12 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) return !old_suppressed; } -struct rte * +rte * bgp_rte_modify_stale(struct rte *r, struct linpool *pool) { - eattr *a = ea_find(r->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY)); - const struct adata *ad = a ? a->u.ptr : NULL; - uint flags = a ? a->flags : BAF_PARTIAL; + eattr *ea = ea_find(r->attrs->eattrs, BGP_EA_ID(BA_COMMUNITY)); + const struct adata *ad = ea ? ea->u.ptr : NULL; + uint flags = ea ? ea->flags : BAF_PARTIAL; if (ad && int_set_contains(ad, BGP_COMM_NO_LLGR)) return NULL; @@ -2319,12 +2321,17 @@ bgp_rte_modify_stale(struct rte *r, struct linpool *pool) if (ad && int_set_contains(ad, BGP_COMM_LLGR_STALE)) return r; - r = rte_cow_rta(r, pool); - bgp_set_attr_ptr(&(r->attrs->eattrs), BA_COMMUNITY, flags, + 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, int_set_add(pool, ad, BGP_COMM_LLGR_STALE)); - r->pflags |= BGP_REF_STALE; + e0.pflags |= BGP_REF_STALE; - return r; + return &e0; } @@ -2396,7 +2403,7 @@ bgp_get_route_info(rte *e, byte *buf) } else if (metric = rt_get_igp_metric(e)) { - if (!rte_resolvable(e)) + if (!rta_resolvable(e->attrs)) buf += bsprintf(buf, "/-"); else if (metric >= IGP_METRIC_UNKNOWN) buf += bsprintf(buf, "/?"); |