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Except for special protocols (nowadays only the kernel syncer), don't

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export host and link scope routes.
This commit is contained in:
Martin Mares 1999-12-08 14:16:13 +00:00
parent dff1f57917
commit 0da472d7e8
4 changed files with 15 additions and 13 deletions
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1
nest/proto.c
View file

@ -91,6 +91,7 @@ proto_new(struct proto_config *c, unsigned size)
p->table = c->table->table;
p->in_filter = c->in_filter;
p->out_filter = c->out_filter;
p->min_scope = SCOPE_SITE;
c->proto = p;
return p;
}

1
nest/protocol.h
View file

@ -98,6 +98,7 @@ struct proto {
char *name; /* Name of this instance (== cf->name) */
unsigned debug; /* Debugging flags */
unsigned preference; /* Default route preference */
int min_scope; /* Minimal route scope accepted */
unsigned disabled; /* Manually disabled */
unsigned proto_state; /* Protocol state machine (see below) */
unsigned core_state; /* Core state machine (see below) */

25
nest/rt-table.c
View file

@ -102,7 +102,7 @@ rte_better(rte *new, rte *old)
}
static inline void
do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *tmpa)
do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *tmpa, int class)
{
struct proto *p = a->proto;
rte *new0 = new;
@ -110,8 +110,9 @@ do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *
if (new)
{
int ok = p->import_control ? p->import_control(p, &new, &tmpa, rte_update_pool) : 0;
if (ok < 0 ||
int ok;
if ((class & IADDR_SCOPE_MASK) < p->min_scope ||
(ok = p->import_control ? p->import_control(p, &new, &tmpa, rte_update_pool) : 0) < 0 ||
(!ok && (p->out_filter == FILTER_REJECT ||
p->out_filter && f_run(p->out_filter, &new, &tmpa, rte_update_pool) > F_MODIFY)
)
@ -142,11 +143,12 @@ static void
rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
{
struct announce_hook *a;
int class = ipa_classify(net->n.prefix);
WALK_LIST(a, tab->hooks)
{
ASSERT(a->proto->core_state == FS_HAPPY || a->proto->core_state == FS_FEEDING);
do_rte_announce(a, net, new, old, tmpa);
do_rte_announce(a, net, new, old, tmpa, class);
}
}
@ -169,7 +171,7 @@ rt_feed_baby(struct proto *p)
{
struct proto *q = e->attrs->proto;
ea_list *tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
do_rte_announce(h, n, e, NULL, tmpa);
do_rte_announce(h, n, e, NULL, tmpa, ipa_classify(n->n.prefix));
lp_flush(rte_update_pool);
}
}
@ -195,15 +197,12 @@ rte_validate(rte *e)
n->n.prefix, n->n.pxlen, e->attrs->from, e->attrs->proto->name);
return 0;
}
if ((c & IADDR_SCOPE_MASK) == SCOPE_HOST)
if ((c & IADDR_SCOPE_MASK) < e->attrs->proto->min_scope)
{
int s = e->attrs->source;
if (s != RTS_STATIC && s != RTS_DEVICE && s != RTS_STATIC_DEVICE)
{
log(L_WARN "Ignoring host scope route %I/%d received from %I via %s",
n->n.prefix, n->n.pxlen, e->attrs->from, e->attrs->proto->name);
return 0;
}
log(L_WARN "Ignoring %s scope route %I/%d received from %I via %s",
ip_scope_text(c & IADDR_SCOPE_MASK),
n->n.prefix, n->n.pxlen, e->attrs->from, e->attrs->proto->name);
return 0;
}
}
return 1;

1
sysdep/unix/krt.c
View file

@ -753,6 +753,7 @@ krt_init(struct proto_config *c)
struct krt_proto *p = proto_new(c, sizeof(struct krt_proto));
p->p.rt_notify = krt_notify;
p->p.min_scope = SCOPE_HOST;
return &p->p;
}