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When rte_update is called for an identical route, don't announce anything.

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Please implement the rte_same hook in your protocols. It should just
compare your metrics stored directly in rte, the rest is done by the core.
This commit is contained in:
Martin Mares 2000-05-06 21:21:19 +00:00
parent ab1129c1bd
commit 67be5b23cd
3 changed files with 21 additions and 3 deletions
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3
TODO
View File

@ -9,9 +9,6 @@ Core
- tagging of external routes?
- when an identical route is received, don't trigger updates
- configure: --enable-ipv6
- configure: IPv6 on glibc 2.0?
- Makefile: install target?

2
nest/protocol.h
View File

@ -135,11 +135,13 @@ struct proto {
* Routing entry hooks (called only for rte's belonging to this protocol):
*
* rte_better Compare two rte's and decide which one is better (1=first, 0=second).
* rte_same Compare two rte's and decide whether they are identical (1=yes, 0=no).
* rte_insert Called whenever a rte is inserted to a routing table.
* rte_remove Called whenever a rte is removed from the routing table.
*/
int (*rte_better)(struct rte *, struct rte *);
int (*rte_same)(struct rte *, struct rte *);
void (*rte_insert)(struct network *, struct rte *);
void (*rte_remove)(struct network *, struct rte *);

19
nest/rt-table.c
View File

@ -272,6 +272,17 @@ rte_free_quick(rte *e)
sl_free(rte_slab, e);
}
static int
rte_same(rte *x, rte *y)
{
return
x->attrs == y->attrs &&
x->flags == y->flags &&
x->pflags == y->pflags &&
x->pref == y->pref &&
(!x->attrs->proto->rte_same || x->attrs->proto->rte_same(x, y));
}
static void
rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmpa)
{
@ -284,6 +295,14 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
{
if (old->attrs->proto == p)
{
if (rte_same(old, new))
{
/* No changes, ignore the new route */
rte_trace_in(D_ROUTES, p, new, "ignored");
rte_free_quick(new);
old->lastmod = now;
return;
}
*k = old->next;
break;
}