diff options
| author | Renato Westphal <renato@opensourcerouting.org> | 2023-03-07 21:13:53 -0300 |
|---|---|---|
| committer | Renato Westphal <renato@opensourcerouting.org> | 2023-03-31 19:28:15 -0300 |
| commit | f07ff222f8683f2f54681bb55b03db830656afe7 (patch) | |
| tree | 3c7472f5af2b049e3b74064dea2ab1574dd94fc3 /ospfd/ospf_route.c | |
| parent | 271588ace08cda6d0c882c71f3ef24a48c3adaae (diff) | |
ospfd: add support for NSSA Type-7 address ranges
Implement NSSA address ranges as specified by RFC 3101:
NSSA border routers may be configured with Type-7 address ranges.
Each Type-7 address range is defined as an [address,mask] pair. Many
separate Type-7 networks may fall into a single Type-7 address range,
just as a subnetted network is composed of many separate subnets.
NSSA border routers may aggregate Type-7 routes by advertising a
single Type-5 LSA for each Type-7 address range. The Type-5 LSA
resulting from a Type-7 address range match will be distributed to
all Type-5 capable areas.
Syntax:
area A.B.C.D nssa range A.B.C.D/M [<not-advertise|cost (0-16777215)>]
Example:
router ospf
router-id 1.1.1.1
area 1 nssa
area 1 nssa range 172.16.0.0/16
area 1 nssa range 10.1.0.0/16
!
Since regular area ranges and NSSA ranges have a lot in common,
this commit reuses the existing infrastructure for area ranges as
much as possible to avoid code duplication.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Diffstat (limited to 'ospfd/ospf_route.c')
| -rw-r--r-- | ospfd/ospf_route.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/ospfd/ospf_route.c b/ospfd/ospf_route.c index 5f18bff1cf..75868056ad 100644 --- a/ospfd/ospf_route.c +++ b/ospfd/ospf_route.c @@ -1008,7 +1008,8 @@ void ospf_prune_unreachable_routers(struct route_table *rtrs) } int ospf_add_discard_route(struct ospf *ospf, struct route_table *rt, - struct ospf_area *area, struct prefix_ipv4 *p) + struct ospf_area *area, struct prefix_ipv4 *p, + bool nssa) { struct route_node *rn; struct ospf_route * or, *new_or; @@ -1027,7 +1028,7 @@ int ospf_add_discard_route(struct ospf *ospf, struct route_table *rt, or = rn->info; - if (or->path_type == OSPF_PATH_INTRA_AREA) { + if (!nssa && or->path_type == OSPF_PATH_INTRA_AREA) { if (IS_DEBUG_OSPF_EVENT) zlog_debug("%s: an intra-area route exists", __func__); @@ -1054,7 +1055,10 @@ int ospf_add_discard_route(struct ospf *ospf, struct route_table *rt, new_or->cost = 0; new_or->u.std.area_id = area->area_id; new_or->u.std.external_routing = area->external_routing; - new_or->path_type = OSPF_PATH_INTER_AREA; + if (nssa) + new_or->path_type = OSPF_PATH_TYPE2_EXTERNAL; + else + new_or->path_type = OSPF_PATH_INTER_AREA; rn->info = new_or; ospf_zebra_add_discard(ospf, p); @@ -1063,7 +1067,7 @@ int ospf_add_discard_route(struct ospf *ospf, struct route_table *rt, } void ospf_delete_discard_route(struct ospf *ospf, struct route_table *rt, - struct prefix_ipv4 *p) + struct prefix_ipv4 *p, bool nssa) { struct route_node *rn; struct ospf_route * or ; @@ -1081,7 +1085,7 @@ void ospf_delete_discard_route(struct ospf *ospf, struct route_table *rt, or = rn->info; - if (or->path_type == OSPF_PATH_INTRA_AREA) { + if (!nssa && or->path_type == OSPF_PATH_INTRA_AREA) { if (IS_DEBUG_OSPF_EVENT) zlog_debug("%s: an intra-area route exists", __func__); return; |