Moved to a much more systematic way of configuring kernel protocols.

  o  Nothing is configured automatically. You _need_ to specify
     the kernel syncer in config file in order to get it started.
  o  Syncing has been split to route syncer (protocol "Kernel") and
     interface syncer (protocol "Device"), device routes are generated
     by protocol "Direct" (now can exist in multiple instances, so that
     it will be possible to feed different device routes to different
     routing tables once multiple tables get supported).

See doc/bird.conf.example for a living example of these shiny features.

1 files changed, 99 insertions, 39 deletions

diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index 9ad4237..8a3db3f 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -17,7 +17,94 @@
 #include "unix.h"
 #include "krt.h"
 
-struct proto_config *cf_krt;
+/*
+ *	Global resources
+ */
+
+void
+krt_io_init(void)
+{
+  krt_if_io_init();
+}
+
+/*
+ *	Interfaces
+ */
+
+struct proto_config *cf_kif;
+
+static struct kif_proto *kif_proto;
+static timer *kif_scan_timer;
+static bird_clock_t kif_last_shot;
+
+static void
+kif_scan(timer *t)
+{
+  struct kif_proto *p = t->data;
+
+  DBG("KIF: It's interface scan time...\n");
+  kif_last_shot = now;
+  krt_if_scan(p);
+}
+
+static void
+kif_force_scan(void)
+{
+  if (kif_proto && kif_last_shot + 2 < now)
+    {
+      kif_scan(kif_scan_timer);
+      tm_start(kif_scan_timer, ((struct kif_config *) kif_proto->p.cf)->scan_time);
+    }
+}
+
+static struct proto *
+kif_init(struct proto_config *c)
+{
+  struct kif_proto *p = proto_new(c, sizeof(struct kif_proto));
+  return &p->p;
+}
+
+static int
+kif_start(struct proto *P)
+{
+  struct kif_proto *p = (struct kif_proto *) P;
+
+  kif_proto = p;
+  krt_if_start(p);
+
+  /* Start periodic interface scanning */
+  kif_scan_timer = tm_new(P->pool);
+  kif_scan_timer->hook = kif_scan;
+  kif_scan_timer->data = p;
+  kif_scan_timer->recurrent = KIF_CF->scan_time;
+  kif_scan(kif_scan_timer);
+  tm_start(kif_scan_timer, KIF_CF->scan_time);
+
+  return PS_UP;
+}
+
+static int
+kif_shutdown(struct proto *P)
+{
+  struct kif_proto *p = (struct kif_proto *) P;
+
+  tm_stop(kif_scan_timer);
+  krt_if_shutdown(p);
+  kif_proto = NULL;
+
+  if_start_update();	/* Remove all interfaces */
+  if_end_update();
+
+  return PS_DOWN;
+}
+
+struct protocol proto_unix_iface = {
+  name:		"Device",
+  priority:	100,
+  init:		kif_init,
+  start:	kif_start,
+  shutdown:	kif_shutdown,
+};
 
 /*
  *	Routes
@@ -210,7 +297,7 @@ krt_got_route_async(struct krt_proto *p, rte *e, int new)
 	   * FIXME: This is limited to one inherited route per destination as we
 	   * use single protocol for all inherited routes. Probably leave it
 	   * as-is (and document it :)), because the correct solution is to
-	   * multiple kernel tables anyway.
+	   * use multiple kernel tables anyway.
 	   */
 	  DBG("Learning\n");
 	  rte_update(net, &p->p, e);
@@ -234,35 +321,27 @@ krt_scan(timer *t)
 {
   struct krt_proto *p = t->data;
 
-  DBG("KRT: It's scan time...\n");
-  krt_if_scan(p);
-
-  p->accum_time += KRT_CF->scan_time;
-  if (KRT_CF->route_scan_time && p->accum_time >= KRT_CF->route_scan_time)
-    {
-      p->accum_time %= KRT_CF->route_scan_time;
-      DBG("Scanning kernel routing table...\n");
-      krt_scan_fire(p);
-      krt_prune(p);
-    }
+  kif_force_scan();
+  DBG("KRT: It's route scan time...\n");
+  krt_scan_fire(p);
+  krt_prune(p);
 }
 
 /*
  *	Protocol glue
  */
 
+struct proto_config *cf_krt;
+
 static int
 krt_start(struct proto *P)
 {
   struct krt_proto *p = (struct krt_proto *) P;
 
-  p->accum_time = KRT_CF->route_scan_time - KRT_CF->scan_time;
-
-  krt_if_start(p);
   krt_scan_start(p);
   krt_set_start(p);
 
-  /* Start periodic interface scanning */
+  /* Start periodic routing table scanning */
   krt_scan_timer = tm_new(P->pool);
   krt_scan_timer->hook = krt_scan;
   krt_scan_timer->data = p;
@@ -278,35 +357,17 @@ krt_shutdown(struct proto *P)
 {
   struct krt_proto *p = (struct krt_proto *) P;
 
+  tm_stop(krt_scan_timer);
+
   if (!KRT_CF->persist)
     krt_flush_routes(p);
 
   krt_set_shutdown(p);
   krt_scan_shutdown(p);
 
-  /* Stop periodic interface scans */
-  tm_stop(krt_scan_timer);
-  krt_if_shutdown(p);
-  /* FIXME: What should we do with interfaces? */
-
   return PS_DOWN;
 }
 
-static void
-krt_preconfig(struct protocol *x, struct config *c)
-{
-  struct krt_config *z = proto_config_new(&proto_unix_kernel, sizeof(struct krt_config));
-
-  cf_krt = &z->c;
-  z->c.preference = DEF_PREF_UKR;
-  z->scan_time = z->route_scan_time = 60;
-  z->learn = z->persist = 0;
-
-  krt_scan_preconfig(z);
-  krt_set_preconfig(z);
-  krt_if_preconfig(z);
-}
-
 static struct proto *
 krt_init(struct proto_config *c)
 {
@@ -318,8 +379,7 @@ krt_init(struct proto_config *c)
 
 struct protocol proto_unix_kernel = {
   name:		"Kernel",
-  priority:	90,
-  preconfig:	krt_preconfig,
+  priority:	80,
   init:		krt_init,
   start:	krt_start,
   shutdown:	krt_shutdown,