mirrors/bird
mirrors/bird
0
0
Fork 0
mirror of https://gitlab.nic.cz/labs/bird.git synced 2024-12-22 09:41:54 +00:00
Code Releases Activity

Fixes a bug in duplicit configured stubnets.

Browse Source 
If there was the same configured stubnet on local and remote
router, the remote route always won regardless of its cost.
This commit is contained in:
Ondrej Zajicek 2010-05-26 12:32:30 +02:00
parent 52572e94ec
commit e0a62ad0f8
2 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
proto/ospf/rt.c
View File

@ -244,14 +244,12 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_
* Local stub networks does not have proper iface in en->nhi
* (because they all have common top_hash_entry en).
* We have to find iface responsible for that stub network.
* Some stubnets does not have any iface. Ignore them.
* Configured stubnets does not have any iface. They will
* be removed in rt_sync().
*/
nf.ifa = find_stub_src(oa, px, pxlen);
nf.nh = IPA_NONE;
if (!nf.ifa)
return;
}
ri_install_net(oa->po, px, pxlen, &nf);
@ -813,7 +811,7 @@ decide_sum_lsa(struct ospf_area *oa, ort *nf, int dest)
return 0;
/* 12.4.3 p4 */
if (nf->n.ifa->oa->areaid == oa->areaid)
if (nf->n.ifa && (nf->n.ifa->oa->areaid == oa->areaid))
return 0;
/* 12.4.3 p5 */
@ -961,7 +959,7 @@ ospf_rt_abr(struct proto_ospf *po)
/* RFC 2328 G.3 - incomplete resolution of virtual next hops */
if (nf->n.type && (nf->n.ifa->type == OSPF_IT_VLINK))
if (nf->n.type && nf->n.ifa && (nf->n.ifa->type == OSPF_IT_VLINK))
reset_ri(&nf->n);
@ -1153,6 +1151,10 @@ ospf_ext_spf(struct proto_ospf *po)
if ((nf2->n.type != RTS_OSPF) && (nf2->n.type != RTS_OSPF_IA))
continue;
/* Next-hop is a part of a configured stubnet */
if (!nf2->n.ifa)
continue;
/* If nh is zero, it is a device route */
nh = ipa_nonzero(nf2->n.nh) ? nf2->n.nh : rt_fwaddr;
nhi = nf2->n.ifa;
@ -1539,6 +1541,10 @@ again1:
if (po->areano > 1)
check_sum_net_lsa(po, nf);
/* Remove configured stubnets */
if (!nf->n.ifa)
reset_ri(&nf->n);
if (reload || memcmp(&nf->n, &nf->o, sizeof(orta)))
{
net *ne = net_get(p->table, nf->fn.prefix, nf->fn.pxlen);

4
proto/ospf/rt.h
View File

@ -72,7 +72,9 @@ ort;
* - nodes may be invalid (fn.type == 0), in that case other invariants don't hold
* - n.metric1 may be at most a small multiple of LSINFINITY,
* therefore sums do not overflow
* - n.oa and n.ifa are always non-NULL
* - n.oa is always non-NULL
* - n.ifa is always non-NULL with one exception - configured stubnet
nodes (in po->rtf). In that case, n.nh is IFA_NONE.
* - oa->rtr does not contain calculating router itself
*/