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-rw-r--r--nest/proto-hooks.c2
-rw-r--r--nest/protocol.h1
-rw-r--r--nest/route.h8
-rw-r--r--nest/rt-table.c101
4 files changed, 75 insertions, 37 deletions
diff --git a/nest/proto-hooks.c b/nest/proto-hooks.c
index 82df5cb..9af6ef5 100644
--- a/nest/proto-hooks.c
+++ b/nest/proto-hooks.c
@@ -188,6 +188,8 @@ void ifa_notify(struct proto *p, unsigned flags, struct ifa *a)
* belonging to network @net being replaced by a new route @new with
* extended attributes @attrs. Either @new or @old or both can be %NULL
* if the corresponding route doesn't exist.
+ *
+ * FIXME documentation
*/
void rt_notify(struct proto *p, net *net, rte *new, rte *old, ea_list *attrs)
{ DUMMY; }
diff --git a/nest/protocol.h b/nest/protocol.h
index d681ae6..865b2b3 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -100,6 +100,7 @@ struct proto {
unsigned debug; /* Debugging flags */
unsigned preference; /* Default route preference */
int min_scope; /* Minimal route scope accepted */
+ unsigned accept_ra_types; /* Which types of route announcements are accepted (RA_OPTIMAL or RA_ANY) */
unsigned disabled; /* Manually disabled */
unsigned proto_state; /* Protocol state machine (see below) */
unsigned core_state; /* Core state machine (see below) */
diff --git a/nest/route.h b/nest/route.h
index 43cfa9d..e55ae1d 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -146,6 +146,7 @@ typedef struct network {
typedef struct rte {
struct rte *next;
net *net; /* Network this RTE belongs to */
+ struct proto *sender; /* Protocol instance that sent the route to the routing table */
struct rta *attrs; /* Attributes of this route */
byte flags; /* Flags (REF_...) */
byte pflags; /* Protocol-specific flags */
@@ -178,6 +179,10 @@ typedef struct rte {
#define REF_COW 1 /* Copy this rte on write */
+/* Types of route announcement, also used as flags */
+#define RA_OPTIMAL 1 /* Announcement of optimal route change */
+#define RA_ANY 2 /* Announcement of any route change */
+
struct config;
void rt_init(void);
@@ -191,6 +196,7 @@ static inline net *net_get(rtable *tab, ip_addr addr, unsigned len) { return (ne
rte *rte_find(net *net, struct proto *p);
rte *rte_get_temp(struct rta *);
void rte_update(rtable *tab, net *net, struct proto *p, rte *new);
+void rte_update2(rtable *tab, net *net, struct proto *p, struct proto *src, rte *new);
void rte_discard(rtable *tab, rte *old);
void rte_dump(rte *);
void rte_free(rte *);
@@ -230,7 +236,7 @@ void rt_show(struct rt_show_data *);
typedef struct rta {
struct rta *next, **pprev; /* Hash chain */
- struct proto *proto; /* Protocol instance */
+ struct proto *proto; /* Protocol instance that originally created the route */
unsigned uc; /* Use count */
byte source; /* Route source (RTS_...) */
byte scope; /* Route scope (SCOPE_... -- see ip.h) */
diff --git a/nest/rt-table.c b/nest/rt-table.c
index b0781a3..176e2de 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -158,7 +158,7 @@ rte_trace_out(unsigned int flag, struct proto *p, rte *e, char *msg)
}
static inline void
-do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *tmpa, int class)
+do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, ea_list *tmpa, int class)
{
struct proto *p = a->proto;
rte *new0 = new;
@@ -234,14 +234,17 @@ do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *
/**
* rte_announce - announce a routing table change
* @tab: table the route has been added to
+ * @type: type of route announcement (RA_OPTIMAL or RA_ANY)
* @net: network in question
* @new: the new route to be announced
- * @old: previous optimal route for the same network
+ * @old: the previous route for the same network
* @tmpa: a list of temporary attributes belonging to the new route
*
* This function gets a routing table update and announces it
* to all protocols connected to the same table by their announcement hooks.
*
+ * previous optimal route for the same network FIXME
+ *
* For each such protocol, we first call its import_control() hook which
* performs basic checks on the route (each protocol has a right to veto
* or force accept of the route before any filter is asked) and adds default
@@ -250,7 +253,7 @@ do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *
* route, the rt_notify() hook of the protocol gets called.
*/
static void
-rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
+rte_announce(rtable *tab, int type, net *net, rte *new, rte *old, ea_list *tmpa)
{
struct announce_hook *a;
int class = ipa_classify(net->n.prefix);
@@ -258,7 +261,8 @@ rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
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, class);
+ if (a->proto->accept_ra_types == type)
+ do_rte_announce(a, type, net, new, old, tmpa, class);
}
}
@@ -271,7 +275,7 @@ rte_validate(rte *e)
if (ipa_nonzero(ipa_and(n->n.prefix, ipa_not(ipa_mkmask(n->n.pxlen)))))
{
log(L_BUG "Ignoring bogus prefix %I/%d received via %s",
- n->n.prefix, n->n.pxlen, e->attrs->proto->name);
+ n->n.prefix, n->n.pxlen, e->sender->name);
return 0;
}
if (n->n.pxlen)
@@ -290,14 +294,14 @@ rte_validate(rte *e)
return 1;
}
log(L_WARN "Ignoring bogus route %I/%d received via %s",
- n->n.prefix, n->n.pxlen, e->attrs->proto->name);
+ n->n.prefix, n->n.pxlen, e->sender->name);
return 0;
}
- if ((c & IADDR_SCOPE_MASK) < e->attrs->proto->min_scope)
+ if ((c & IADDR_SCOPE_MASK) < e->sender->min_scope)
{
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);
+ n->n.prefix, n->n.pxlen, e->attrs->from, e->sender->name);
return 0;
}
}
@@ -337,7 +341,7 @@ rte_same(rte *x, rte *y)
}
static void
-rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmpa)
+rte_recalculate(rtable *table, net *net, struct proto *p, struct proto *src, rte *new, ea_list *tmpa)
{
rte *old_best = net->routes;
rte *old = NULL;
@@ -346,7 +350,7 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
k = &net->routes; /* Find and remove original route from the same protocol */
while (old = *k)
{
- if (old->attrs->proto == p)
+ if (old->attrs->proto == src)
{
if (new && rte_same(old, new))
{
@@ -362,10 +366,14 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
k = &old->next;
}
+ log(L_WARN "ANNOUNCE %I/%d from %s (%s) %p", net->n.prefix, net->n.pxlen, p->name, src->name, old_best);
+
+ rte_announce(table, RA_ANY, net, new, old, tmpa);
+
if (new && rte_better(new, old_best)) /* It's a new optimal route => announce and relink it */
{
rte_trace_in(D_ROUTES, p, new, "added [best]");
- rte_announce(table, net, new, old_best, tmpa);
+ rte_announce(table, RA_OPTIMAL, net, new, old_best, tmpa);
new->next = net->routes;
net->routes = new;
}
@@ -377,7 +385,7 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
for(s=net->routes; s; s=s->next)
if (rte_better(s, r))
r = s;
- rte_announce(table, net, r, old_best, tmpa);
+ rte_announce(table, RA_OPTIMAL, net, r, old_best, tmpa);
if (r) /* Re-link the new optimal route */
{
k = &net->routes;
@@ -478,11 +486,18 @@ rte_update_unlock(void)
void
rte_update(rtable *table, net *net, struct proto *p, rte *new)
{
+ rte_update2(table, net, p, p, new);
+}
+
+void
+rte_update2(rtable *table, net *net, struct proto *p, struct proto *src, rte *new)
+{
ea_list *tmpa = NULL;
rte_update_lock();
if (new)
{
+ new->sender = p;
struct filter *filter = p->in_filter;
/* Do not filter routes going to the secondary side of the pipe,
@@ -501,8 +516,8 @@ rte_update(rtable *table, net *net, struct proto *p, rte *new)
rte_trace_in(D_FILTERS, p, new, "filtered out");
goto drop;
}
- if (p->make_tmp_attrs)
- tmpa = p->make_tmp_attrs(new, rte_update_pool);
+ if (src->make_tmp_attrs)
+ tmpa = src->make_tmp_attrs(new, rte_update_pool);
if (filter)
{
ea_list *old_tmpa = tmpa;
@@ -512,14 +527,14 @@ rte_update(rtable *table, net *net, struct proto *p, rte *new)
rte_trace_in(D_FILTERS, p, new, "filtered out");
goto drop;
}
- if (tmpa != old_tmpa && p->store_tmp_attrs)
- p->store_tmp_attrs(new, tmpa);
+ if (tmpa != old_tmpa && src->store_tmp_attrs)
+ src->store_tmp_attrs(new, tmpa);
}
if (!(new->attrs->aflags & RTAF_CACHED)) /* Need to copy attributes */
new->attrs = rta_lookup(new->attrs);
new->flags |= REF_COW;
}
- rte_recalculate(table, net, p, new, tmpa);
+ rte_recalculate(table, net, p, src, new, tmpa);
rte_update_unlock();
return;
@@ -531,11 +546,8 @@ drop:
void
rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */
{
- net *n = old->net;
- struct proto *p = old->attrs->proto;
-
rte_update_lock();
- rte_recalculate(t, n, p, NULL, NULL);
+ rte_recalculate(t, old->net, old->sender, old->attrs->proto, NULL, NULL);
rte_update_unlock();
}
@@ -673,8 +685,8 @@ again:
ncnt++;
rescan:
for (e=n->routes; e; e=e->next, rcnt++)
- if (e->attrs->proto->core_state != FS_HAPPY &&
- e->attrs->proto->core_state != FS_FEEDING)
+ if (e->sender->core_state != FS_HAPPY &&
+ e->sender->core_state != FS_FEEDING)
{
rte_discard(tab, e);
rdel++;
@@ -827,6 +839,18 @@ rt_commit(struct config *new, struct config *old)
DBG("\tdone\n");
}
+static inline void
+do_feed_baby(struct proto *p, int type, struct announce_hook *h, net *n, rte *e)
+{
+ struct proto *q = e->attrs->proto;
+ ea_list *tmpa;
+
+ rte_update_lock();
+ tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
+ do_rte_announce(h, type, n, e, NULL, tmpa, ipa_classify(n->n.prefix));
+ rte_update_unlock();
+}
+
/**
* rt_feed_baby - advertise routes to a new protocol
* @p: protocol to be fed
@@ -865,19 +889,24 @@ again:
FIB_ITERATE_PUT(fit, fn);
return 0;
}
- if (e)
- {
- struct proto *q = e->attrs->proto;
- ea_list *tmpa;
-
- if (p->core_state != FS_FEEDING)
- return 1; /* In the meantime, the protocol fell down. */
- rte_update_lock();
- tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
- do_rte_announce(h, n, e, NULL, tmpa, ipa_classify(n->n.prefix));
- rte_update_unlock();
- max_feed--;
- }
+
+ if (p->accept_ra_types == RA_OPTIMAL)
+ if (e)
+ {
+ if (p->core_state != FS_FEEDING)
+ return 1; /* In the meantime, the protocol fell down. */
+ do_feed_baby(p, RA_OPTIMAL, h, n, e);
+ max_feed--;
+ }
+
+ if (p->accept_ra_types == RA_ANY)
+ for(e = n->routes; e != NULL; e = e->next)
+ {
+ if (p->core_state != FS_FEEDING)
+ return 1; /* In the meantime, the protocol fell down. */
+ do_feed_baby(p, RA_ANY, h, n, e);
+ max_feed--;
+ }
}
FIB_ITERATE_END(fn);
p->feed_ahook = h->next;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 06:59:59 +0100