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Experimental code for route servers.

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This commit is contained in:
Ondrej Filip 2012-04-08 21:15:14 +02:00
parent fb829de690
commit 1ed3b1dc83
2 changed files with 70 additions and 11 deletions
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80
nest/rt-table.c
View File

@ -134,6 +134,17 @@ rte_do_cow(rte *r)
return 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 int /* Actually better or at least as good as */
rte_better(rte *new, rte *old)
{
@ -190,6 +201,7 @@ do_rte_announce(struct announce_hook *a, int type UNUSED, net *net, rte *new, rt
struct proto_stats *stats = &p->stats;
rte *new0 = new;
rte *old0 = old;
struct rta loca;
int ok;
#ifdef CONFIG_PIPE
@ -230,6 +242,63 @@ do_rte_announce(struct announce_hook *a, int type UNUSED, net *net, rte *new, rt
else
stats->exp_withdraws_received++;
#ifdef CONFIG_BGP
if ((p->proto == &proto_bgp) && (p->accept_ra_types == RA_ANY))
{
rte *x = net->routes;
rte *y = net->routes;
rte *xbest = NULL;
struct ea_list *xa;
/* Route Server Client */
if (p->debug) log(L_TRACE "XXX: %s - Entering my code", p->name);
while(x)
{
y = x;
xa = p->make_tmp_attrs ? p->make_tmp_attrs(x, rte_update_pool) : NULL;
if ( filter == FILTER_ACCEPT || (!filter) || (f_run(filter, &y, &xa, rte_update_pool, FF_FORCE_TMPATTR) == F_ACCEPT))
{
if (xbest)
{
if (rte_better(x , xbest)) xbest = x; // XXX HERE
}
else xbest = x;
}
x = x->next;
}
// Now, I should have the best route that went through the filter
if (xbest)
{
rte_trace_out(D_ROUTES, p, xbest, "XXX: best route found");
if (old && rte_same(xbest, old)) { if (p->debug) log(L_TRACE "XXX: DELETING BEST ROUTE");}
if ((new) && rte_better(xbest, new)) { if (p->debug) log(L_TRACE "XXX: Ignoring - add"); return;} // Ignore routes worse than 'best'.
if ((!new) && old && rte_better(xbest, old)) { if (p->debug) log(L_TRACE "XXX: Ignoring - remove"); return;} // Ignore routes worse than 'best'.
if (!new)
{
if (p->debug) log(L_TRACE "XXX: So I am deleting the best route, hmm");
memcpy(&loca, xbest->attrs, sizeof(rta));
loca.aflags = 0;
loca.eattrs = xbest->attrs->eattrs;
loca.hostentry = NULL;
new = rte_get_temp(&loca);
new->net = xbest->net;
new->pflags = 0;
memcpy(&(new->u), &(xbest->u), sizeof(new->u));
new->pref = xbest->pref;
new->pflags = xbest->pflags;
}
}
else { if (p->debug) log(L_TRACE "XXX: No best route"); }
if (p->debug) log(L_TRACE "XXX: %s - Leaving my code", p->name);
}
#endif
/*
* This is a tricky part - we don't know whether route 'old' was
* exported to protocol 'p' or was filtered by the export filter.
@ -410,17 +479,6 @@ 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, struct proto *src, rte *new, ea_list *tmpa)
{

1
proto/bgp/bgp.c
View File

@ -924,6 +924,7 @@ bgp_init(struct proto_config *C)
p->remote_as = c->remote_as;
p->is_internal = (c->local_as == c->remote_as);
p->rs_client = c->rs_client;
if (c->rs_client) P->accept_ra_types = RA_ANY;
p->rr_client = c->rr_client;
p->igp_table = get_igp_table(c);