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Implements router advertisements activated by received routes.

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The RAdv protocol could be configured to change its behavior based on
availability of routes, e.g., do not announce router lifetime when a
default route is not available.
This commit is contained in:
Ondrej Zajicek
2013-02-08 23:58:27 +01:00
parent d214ae4fdc
commit 36da2857bc
8 changed files with 225 additions and 35 deletions
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37
nest/rt-table.c
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@@ -213,7 +213,8 @@ export_filter(struct announce_hook *ah, rte *rt0, rte **rt_free, ea_list **tmpa,
goto reject;
stats->exp_updates_rejected++;
rte_trace_out(D_FILTERS, p, rt, "rejected by protocol");
if (v == RIC_REJECT)
rte_trace_out(D_FILTERS, p, rt, "rejected by protocol");
goto reject;
}
if (v > 0)
@@ -1042,6 +1043,34 @@ rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during gar
rte_update_unlock();
}
/* Check rtable for best route to given net whether it would be exported do p */
int
rt_examine(rtable *t, ip_addr prefix, int pxlen, struct proto *p, struct filter *filter)
{
net *n = net_find(t, prefix, pxlen);
rte *rt = n ? n->routes : NULL;
if (!rte_is_valid(rt))
return 0;
rte_update_lock();
/* Rest is stripped down export_filter() */
struct proto *src = rt->attrs->proto;
ea_list *tmpa = src->make_tmp_attrs ? src->make_tmp_attrs(rt, rte_update_pool) : NULL;
int v = p->import_control ? p->import_control(p, &rt, &tmpa, rte_update_pool) : 0;
if (v == RIC_PROCESS)
v = (f_run(filter, &rt, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) <= F_ACCEPT);
/* Discard temporary rte */
if (rt != n->routes)
rte_free(rt);
rte_update_unlock();
return v > 0;
}
/**
* rte_dump - dump a route
* @e: &rte to be dumped
@@ -2081,7 +2110,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
ee = e;
rte_update_lock(); /* We use the update buffer for filtering */
tmpa = p0->make_tmp_attrs ? p0->make_tmp_attrs(e, rte_update_pool) : NULL;
ok = (d->filter == FILTER_ACCEPT || f_run(d->filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) <= F_ACCEPT);
ok = f_run(d->filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) <= F_ACCEPT;
if (p2 && p2 != p0) ok = 0;
if (ok && d->export_mode)
{
@@ -2095,8 +2124,8 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
'configure soft' command may change the export filter
and do not update routes */
if ((a = proto_find_announce_hook(p1, d->table)) && ((a->out_filter == FILTER_REJECT) ||
(a->out_filter && f_run(a->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT)))
if ((a = proto_find_announce_hook(p1, d->table)) &&
(f_run(a->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT))
ok = 0;
}
}