From b3bc68e5a4eecd85138463ae5742c2ccaa1db4bb Mon Sep 17 00:00:00 2001 From: Paul Jakma Date: Thu, 4 Sep 2008 13:52:07 +0100 Subject: [ospfd] Minor enhancements to recent self-host-routes suppression patch * ospf_spf.c: (ospf_spf_process_stubs) Track whether parent router vertex is the root, so that the host-route suppression logic need only be activated for such vertices. Move the actual logic to ospf_intra_add_stub. * ospf_route.c: (ospf_intra_add_stub) Main test of link moved here, notionally more appropriate. --- ospfd/ospf_spf.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) (limited to 'ospfd/ospf_spf.c') diff --git a/ospfd/ospf_spf.c b/ospfd/ospf_spf.c index 15d27be7..82f0fedd 100644 --- a/ospfd/ospf_spf.c +++ b/ospfd/ospf_spf.c @@ -946,7 +946,8 @@ ospf_spf_dump (struct vertex *v, int i) /* Second stage of SPF calculation. */ static void ospf_spf_process_stubs (struct ospf_area *area, struct vertex *v, - struct route_table *rt) + struct route_table *rt, + int parent_is_root) { struct listnode *cnode, *cnnode; struct vertex *child; @@ -981,21 +982,7 @@ ospf_spf_process_stubs (struct ospf_area *area, struct vertex *v, (l->m[0].tos_count * ROUTER_LSA_TOS_SIZE)); if (l->m[0].type == LSA_LINK_TYPE_STUB) - { - /* PtP links with /32 masks adds host routes to the remote host, - see RFC 2328, 12.4.1.1, Option 1. - Make sure that such routes are ignored */ - /* XXX: Change to breadth-first and avoid the lookup */ - if (l->link_data.s_addr == 0xffffffff && - ospf_if_lookup_by_local_addr (area->ospf, NULL, l->link_id)) - { - if (IS_DEBUG_OSPF_EVENT) - zlog_debug ("ospf_spf_process_stubs(): ignoring host route " - "%s/32 to self.", inet_ntoa (l->link_id)); - continue; - } - ospf_intra_add_stub (rt, l, v, area); - } + ospf_intra_add_stub (rt, l, v, area, parent_is_root); } } @@ -1005,8 +992,17 @@ ospf_spf_process_stubs (struct ospf_area *area, struct vertex *v, { if (CHECK_FLAG (child->flags, OSPF_VERTEX_PROCESSED)) continue; - - ospf_spf_process_stubs (area, child, rt); + + /* the first level of routers connected to the root + * should have 'parent_is_root' set, including those + * connected via a network vertex. + */ + if (area->spf == v) + parent_is_root = 1; + else if (v->type == OSPF_VERTEX_ROUTER) + parent_is_root = 0; + + ospf_spf_process_stubs (area, child, rt, parent_is_root); SET_FLAG (child->flags, OSPF_VERTEX_PROCESSED); } @@ -1193,7 +1189,7 @@ ospf_spf_calculate (struct ospf_area *area, struct route_table *new_table, } /* Second stage of SPF calculation procedure's */ - ospf_spf_process_stubs (area, area->spf, new_table); + ospf_spf_process_stubs (area, area->spf, new_table, 0); /* Free candidate queue. */ pqueue_delete (candidate); -- cgit v1.2.1