mirrors/bird
mirrors/bird
0
0
Fork 0
mirror of https://gitlab.nic.cz/labs/bird.git synced 2024-12-31 14:11:54 +00:00
Code Releases Activity

Fixed best route announcements after NHU

Browse Source 
When more routes in one net changed at once, the best route
announcements were inconsistent which confused exporters.
This commit is contained in:
Maria Matejka 2024-04-07 13:23:59 +02:00
parent 67aafd99d3
commit 2eebb680c2
1 changed files with 40 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
nest/rt-table.c
View File

@ -3464,20 +3464,55 @@ rt_next_hop_update_net(struct rtable_private *tab, struct netindex *ni, net *n)
n->routes = new;
}
uint total = 0;
/* Announce the changes */
for (uint i=0; i<count; i++)
{
if (!updates[i].new_stored)
continue;
/* Now we have to announce the routes the right way, to not cause any
* strange problems with consistency. */
ASSERT_DIE(updates[0].old == old_best);
/* Find new best route original position */
uint nbpos = ~0;
for (uint i=0; i<count; i++)
if ((updates[i].new_stored == new) || (updates[i].old == new))
{
nbpos = i;
break;
}
ASSERT_DIE(~nbpos);
_Bool nb = (new->rte.src == updates[i].new.src), ob = (i == 0);
const char *best_indicator[2][2] = {
{ "autoupdated", "autoupdated [-best]" },
{ "autoupdated [+best]", "autoupdated [best]" }
};
/* Best both updated and promoted: announce it first */
if (nbpos && updates[nbpos].new_stored)
{
rt_rte_trace_in(D_ROUTES, updates[nbpos].new.sender->req, &updates[nbpos].new,
best_indicator[1][0]);
rte_announce(tab, ni, n,
&updates[nbpos].new_stored->rte, &updates[nbpos].old->rte,
&new->rte, &old_best->rte);
}
else
nbpos = 0;
uint total = 0;
/* Announce the changes */
for (uint i=0; i<count; i++)
{
/* Not changed at all */
if (!updates[i].new_stored)
continue;
/* Already announced */
if (nbpos && (i == nbpos))
continue;
_Bool nb = (new->rte.src == updates[i].new.src), ob = (i == 0);
rt_rte_trace_in(D_ROUTES, updates[i].new.sender->req, &updates[i].new, best_indicator[nb][ob]);
rte_announce(tab, ni, n, &updates[i].new_stored->rte, &updates[i].old->rte, &new->rte, &old_best->rte);
rte_announce(tab, ni, n,
&updates[i].new_stored->rte, &updates[i].old->rte,
&new->rte, (!nbpos && !i) ? &old_best->rte : &new->rte);
total++;
}