diff options
Diffstat (limited to 'proto/bgp/attrs.c')
| -rw-r--r-- | proto/bgp/attrs.c | 51 |
1 files changed, 29 insertions, 22 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c index 6963833a..65e87c96 100644 --- a/proto/bgp/attrs.c +++ b/proto/bgp/attrs.c @@ -1900,14 +1900,24 @@ bgp_get_neighbor(rte *r) static inline int rte_stale(rte *r) { - if (r->u.bgp.stale < 0) + if (r->pflags & BGP_REF_STALE) + return 1; + + if (r->pflags & BGP_REF_NOT_STALE) + return 0; + + /* If staleness is unknown, compute and cache it */ + eattr *a = ea_find(r->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); + if (a && int_set_contains(a->u.ptr, BGP_COMM_LLGR_STALE)) { - /* If staleness is unknown, compute and cache it */ - eattr *a = ea_find(r->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); - r->u.bgp.stale = a && int_set_contains(a->u.ptr, BGP_COMM_LLGR_STALE); + r->pflags |= BGP_REF_STALE; + return 1; + } + else + { + r->pflags |= BGP_REF_NOT_STALE; + return 0; } - - return r->u.bgp.stale; } int @@ -1919,8 +1929,8 @@ bgp_rte_better(rte *new, rte *old) u32 n, o; /* Skip suppressed routes (see bgp_rte_recalculate()) */ - n = new->u.bgp.suppressed; - o = old->u.bgp.suppressed; + n = new->pflags & BGP_REF_SUPPRESSED; + o = old->pflags & BGP_REF_SUPPRESSED; if (n > o) return 0; if (n < o) @@ -2064,17 +2074,14 @@ bgp_rte_mergable(rte *pri, rte *sec) u32 p, s; /* Skip suppressed routes (see bgp_rte_recalculate()) */ - if (pri->u.bgp.suppressed != sec->u.bgp.suppressed) + /* LLGR draft - depreference stale routes */ + if (pri->pflags != sec->pflags) return 0; /* RFC 4271 9.1.2.1. Route resolvability test */ if (rte_resolvable(pri) != rte_resolvable(sec)) return 0; - /* LLGR draft - depreference stale routes */ - if (rte_stale(pri) != rte_stale(sec)) - return 0; - /* Start with local preferences */ x = ea_find(pri->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); y = ea_find(sec->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); @@ -2154,7 +2161,7 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) rte *key = new ? new : old; u32 lpref = key->attrs->pref; u32 lasn = bgp_get_neighbor(key); - int old_suppressed = old ? old->u.bgp.suppressed : 0; + int old_suppressed = old ? !!(old->pflags & BGP_REF_SUPPRESSED) : 0; /* * Proper RFC 4271 path selection is a bit complicated, it cannot be @@ -2206,11 +2213,11 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) */ if (new) - new->u.bgp.suppressed = 1; + new->pflags |= BGP_REF_SUPPRESSED; if (old) { - old->u.bgp.suppressed = 1; + old->pflags |= BGP_REF_SUPPRESSED; /* The fast case - replace not best with worse (or remove not best) */ if (old_suppressed && !(new && bgp_rte_better(new, old))) @@ -2222,7 +2229,7 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) for (s=net->routes; rte_is_valid(s); s=s->next) if (use_deterministic_med(s) && same_group(s, lpref, lasn)) { - s->u.bgp.suppressed = 1; + s->pflags |= BGP_REF_SUPPRESSED; if (!r || bgp_rte_better(s, r)) r = s; } @@ -2233,16 +2240,16 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best) /* Found if new is mergable with best-in-group */ if (new && (new != r) && bgp_rte_mergable(r, new)) - new->u.bgp.suppressed = 0; + 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->u.bgp.suppressed = 0; + s->pflags &= ~BGP_REF_SUPPRESSED; /* Found best-in-group */ - r->u.bgp.suppressed = 0; + r->pflags &= ~BGP_REF_SUPPRESSED; /* * There are generally two reasons why we have to force @@ -2290,7 +2297,7 @@ bgp_rte_modify_stale(struct rte *r, struct linpool *pool) r = rte_cow_rta(r, pool); bgp_set_attr_ptr(&(r->attrs->eattrs), pool, BA_COMMUNITY, flags, int_set_add(pool, ad, BGP_COMM_LLGR_STALE)); - r->u.bgp.stale = 1; + r->pflags |= BGP_REF_STALE; return r; } @@ -2377,7 +2384,7 @@ bgp_get_route_info(rte *e, byte *buf) buf += bsprintf(buf, " (%d", e->attrs->pref); - if (e->u.bgp.suppressed) + if (e->pflags & BGP_REF_SUPPRESSED) buf += bsprintf(buf, "-"); if (rte_stale(e)) |