bgpd: Set no-export community for blackhole tagged prefixes

RFC says to prevent propagation of the prefix outside the local AS.

So, let's use NO_EXPORT.

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>

diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index 2a3fdc65c9946f72d27dcea84fc9c6449b4726f0..f7945ce140f1ac348c6b57dcadb41fdf439566fa 100644 (file)
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -3506,18 +3506,18 @@ bool bgp_update_martian_nexthop(struct bgp *bgp, afi_t afi, safi_t safi,
        return ret;
 }
 
-static void bgp_attr_add_no_advertise_community(struct attr *attr)
+static void bgp_attr_add_no_export_community(struct attr *attr)
 {
        struct community *old;
        struct community *new;
        struct community *merge;
-       struct community *noadv;
+       struct community *no_export;
 
        old = attr->community;
-       noadv = community_str2com("no-advertise");
+       no_export = community_str2com("no-export");
 
        if (old) {
-               merge = community_merge(community_dup(old), noadv);
+               merge = community_merge(community_dup(old), no_export);
 
                if (!old->refcnt)
                        community_free(&old);
@@ -3525,10 +3525,10 @@ static void bgp_attr_add_no_advertise_community(struct attr *attr)
                new = community_uniq_sort(merge);
                community_free(&merge);
        } else {
-               new = community_dup(noadv);
+               new = community_dup(no_export);
        }
 
-       community_free(&noadv);
+       community_free(&no_export);
 
        attr->community = new;
        attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_COMMUNITIES);
@@ -3738,7 +3738,7 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
                if (new_attr.community
                    && community_include(new_attr.community,
                                         COMMUNITY_BLACKHOLE))
-                       bgp_attr_add_no_advertise_community(&new_attr);
+                       bgp_attr_add_no_export_community(&new_attr);
 
                /* If we receive the graceful-shutdown community from an eBGP
                 * peer we must lower local-preference */