From 7eb5b47e54169ac0da40ed1a6760db5d5f915a4d Mon Sep 17 00:00:00 2001 From: Paul Jakma Date: Tue, 13 Oct 2009 16:13:13 +0100 Subject: ospfd: Remember network LSA sequence numbers across up/downs of an interface * ospf_interface.h: (struct ospf_if_params) add field for saved network LSA seqnum * ospf_interfa.c: (ospf_new_if_params) init network_lsa_seqnum field to initial seqnum - doesnt matter though. * ospf_lsa.c: (ospf_network_lsa_new) check for any saved sequence number, and use if it exists. Save the result back. This should help avoid needless round of LSUpdate/LSRequests when a neighbour has to tell the originator "uhm, i have something newer than that already". * ospf_vty.c: (show_ip_ospf_interface_sub) Show the saved network LSA seqnum --- ospfd/ospf_lsa.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) (limited to 'ospfd/ospf_lsa.c') diff --git a/ospfd/ospf_lsa.c b/ospfd/ospf_lsa.c index 0c23909b..ec736fc1 100644 --- a/ospfd/ospf_lsa.c +++ b/ospfd/ospf_lsa.c @@ -1048,6 +1048,7 @@ ospf_network_lsa_new (struct ospf_interface *oi) struct stream *s; struct ospf_lsa *new; struct lsa_header *lsah; + struct ospf_if_params *oip; int length; /* If there are no neighbours on this network (the net is stub), @@ -1086,7 +1087,23 @@ ospf_network_lsa_new (struct ospf_interface *oi) new->data = ospf_lsa_data_new (length); memcpy (new->data, lsah, length); stream_free (s); - + + /* Remember prior network LSA sequence numbers, even if we stop + * originating one for this oi, to try avoid re-originating LSAs with a + * prior sequence number, and thus speed up adjency forming & convergence. + */ + if ((oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4))) + { + new->data->ls_seqnum = oip->network_lsa_seqnum; + new->data->ls_seqnum = lsa_seqnum_increment (new); + } + else + { + oip = ospf_get_if_params (oi->ifp, oi->address->u.prefix4); + ospf_if_update_params (oi->ifp, oi->address->u.prefix4); + } + oip->network_lsa_seqnum = new->data->ls_seqnum; + return new; } @@ -1125,6 +1142,7 @@ ospf_network_lsa_refresh (struct ospf_lsa *lsa, struct ospf_interface *oi) { struct ospf_area *area = lsa->area; struct ospf_lsa *new; + struct ospf_if_params *oip; assert (lsa->data); @@ -1135,7 +1153,10 @@ ospf_network_lsa_refresh (struct ospf_lsa *lsa, struct ospf_interface *oi) new = ospf_network_lsa_new (oi); if (new == NULL) return -1; - new->data->ls_seqnum = lsa_seqnum_increment (lsa); + + oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4); + assert (oip != NULL); + oip->network_lsa_seqnum = new->data->ls_seqnum = lsa_seqnum_increment (lsa); ospf_lsa_install (area->ospf, oi, new); -- cgit v1.2.1