Removes phantom protocol from the pipe design.

It seems that by adding one pipe-specific exception to route
announcement code and by adding one argument to rt_notify() callback i
could completely eliminate the need for the phantom protocol instance
and therefore make the code more straightforward. It will also fix some
minor bugs (like ignoring debug flag changes from the command line).

4 files changed, 22 insertions, 21 deletions

diff --git a/nest/proto-hooks.c b/nest/proto-hooks.c
index c30b107..3d19e3f 100644
--- a/nest/proto-hooks.c
+++ b/nest/proto-hooks.c
@@ -178,13 +178,14 @@ void ifa_notify(struct proto *p, unsigned flags, struct ifa *a)
 /**
  * rt_notify - notify instance about routing table change
  * @p: protocol instance
+ * @table: a routing table 
  * @net: a network entry
  * @new: new route for the network
  * @old: old route for the network
  * @attrs: extended attributes associated with the @new entry
  *
  * The rt_notify() hook is called to inform the protocol instance about
- * changes in the routing table it's connected to, that is a route @old
+ * changes in the connected routing table @table, that is a route @old
  * 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.
diff --git a/nest/proto.c b/nest/proto.c
index a7e4e0c..57c2aa1 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -133,11 +133,6 @@ proto_init_instance(struct proto *p)
   p->attn = ev_new(p->pool);
   p->attn->data = p;
   rt_lock_table(p->table);
-
-#ifdef CONFIG_PIPE
-  if (proto_is_pipe(p))
-    rt_lock_table(pipe_get_peer_table(p));
-#endif
 }
 
 /**
diff --git a/nest/protocol.h b/nest/protocol.h
index 876427a..82f3766 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -16,6 +16,7 @@
 
 struct iface;
 struct ifa;
+struct rtable;
 struct rte;
 struct neighbor;
 struct rta;
@@ -162,7 +163,7 @@ struct proto {
 
   void (*if_notify)(struct proto *, unsigned flags, struct iface *i);
   void (*ifa_notify)(struct proto *, unsigned flags, struct ifa *a);
-  void (*rt_notify)(struct proto *, struct network *net, struct rte *new, struct rte *old, struct ea_list *attrs);
+  void (*rt_notify)(struct proto *, struct rtable *table, struct network *net, struct rte *new, struct rte *old, struct ea_list *attrs);
   void (*neigh_notify)(struct neighbor *neigh);
   struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool);
   void (*store_tmp_attrs)(struct rte *rt, struct ea_list *attrs);
@@ -339,13 +340,7 @@ struct announce_hook *proto_add_announce_hook(struct proto *, struct rtable *);
  */
 
 #ifdef CONFIG_PIPE
-
-static inline int proto_is_pipe(struct proto *p)
-{ return p->proto == &proto_pipe; }
-
-struct rtable *pipe_get_peer_table(struct proto *p);
-struct proto_stats *pipe_get_peer_stats(struct proto *p);
-
+#include "proto/pipe/pipe.h"
 #endif
 
 
diff --git a/nest/rt-table.c b/nest/rt-table.c
index c9e421e..72a1cb0 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -161,6 +161,7 @@ static inline void
 do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, ea_list *tmpa, int class, int refeed)
 {
   struct proto *p = a->proto;
+  struct filter *filter = p->out_filter;
   struct proto_stats *stats = &p->stats;
   rte *new0 = new;
   rte *old0 = old;
@@ -168,6 +169,15 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old,
 
   int fast_exit_hack = 0;
 
+#ifdef CONFIG_PIPE
+  /* The secondary direction of the pipe */
+  if (proto_is_pipe(p) && (p->table != a->table))
+    {
+      filter = p->in_filter;
+      stats = pipe_get_peer_stats(p);
+    }
+#endif
+
   if (new)
     {
       stats->exp_updates_received++;
@@ -186,8 +196,8 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old,
 	}
       else if (ok)
 	rte_trace_out(D_FILTERS, p, new, "forced accept by protocol");
-      else if (p->out_filter == FILTER_REJECT ||
-	       p->out_filter && f_run(p->out_filter, &new, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT)
+      else if (filter == FILTER_REJECT ||
+	       filter && f_run(filter, &new, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT)
 	{
 	  stats->exp_updates_filtered++;
 	  drop_reason = "filtered out";
@@ -230,13 +240,13 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old,
 
   if (old && !refeed)
     {
-      if (p->out_filter == FILTER_REJECT)
+      if (filter == FILTER_REJECT)
 	old = NULL;
       else
 	{
 	  ea_list *tmpb = p->make_tmp_attrs ? p->make_tmp_attrs(old, rte_update_pool) : NULL;
 	  ok = p->import_control ? p->import_control(p, &old, &tmpb, rte_update_pool) : 0;
-	  if (ok < 0 || (!ok && p->out_filter && f_run(p->out_filter, &old, &tmpb, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT))
+	  if (ok < 0 || (!ok && filter && f_run(filter, &old, &tmpb, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT))
 	    {
 	      if (old != old0)
 		rte_free(old);
@@ -271,18 +281,18 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old,
 	rte_trace_out(D_ROUTES, p, old, "removed");
     }
   if (!new)
-    p->rt_notify(p, net, NULL, old, NULL);
+    p->rt_notify(p, a->table, net, NULL, old, NULL);
   else if (tmpa)
     {
       ea_list *t = tmpa;
       while (t->next)
 	t = t->next;
       t->next = new->attrs->eattrs;
-      p->rt_notify(p, net, new, old, tmpa);
+      p->rt_notify(p, a->table, net, new, old, tmpa);
       t->next = NULL;
     }
   else
-    p->rt_notify(p, net, new, old, new->attrs->eattrs);
+    p->rt_notify(p, a->table, net, new, old, new->attrs->eattrs);
   if (new && new != new0)	/* Discard temporary rte's */
     rte_free(new);
   if (old && old != old0)