diff options
Diffstat (limited to 'bgpd/bgp_aspath.c')
| -rw-r--r-- | bgpd/bgp_aspath.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/bgpd/bgp_aspath.c b/bgpd/bgp_aspath.c index 13f32b86..440815b4 100644 --- a/bgpd/bgp_aspath.c +++ b/bgpd/bgp_aspath.c @@ -1122,6 +1122,42 @@ aspath_private_as_check (struct aspath *aspath) return 1; } +/* AS path confed check. If aspath contains confed set or sequence then return 1. */ +int +aspath_confed_check (struct aspath *aspath) +{ + struct assegment *seg; + + if ( !(aspath && aspath->segments) ) + return 0; + + seg = aspath->segments; + + while (seg) + { + if (seg->type == AS_CONFED_SET || seg->type == AS_CONFED_SEQUENCE) + return 1; + seg = seg->next; + } + return 0; +} + +/* Leftmost AS path segment confed check. If leftmost AS segment is of type + AS_CONFED_SEQUENCE or AS_CONFED_SET then return 1. */ +int +aspath_left_confed_check (struct aspath *aspath) +{ + + if ( !(aspath && aspath->segments) ) + return 0; + + if ( (aspath->segments->type == AS_CONFED_SEQUENCE) + || (aspath->segments->type == AS_CONFED_SET) ) + return 1; + + return 0; +} + /* Merge as1 to as2. as2 should be uninterned aspath. */ static struct aspath * aspath_merge (struct aspath *as1, struct aspath *as2) @@ -1172,6 +1208,10 @@ aspath_prepend (struct aspath *as1, struct aspath *as2) while (seg1 && seg1->next) seg1 = seg1->next; + /* Delete any AS_CONFED_SEQUENCE segment from as2. */ + if (seg1->type == AS_SEQUENCE && seg2->type == AS_CONFED_SEQUENCE) + as2 = aspath_delete_confed_seq (as2); + /* Compare last segment type of as1 and first segment type of as2. */ if (seg1->type != seg2->type) return aspath_merge (as1, as2); |