From fad04c750ca6906fb095f1b45958dec0ac8e210c Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Thu, 13 Jun 2013 11:27:14 +0200
Subject: [PATCH] Fixes problems with kernel routes multiple routing tables.

Temporary dummy routes created by a kernel protocol during routing table
scan get mixed with real routes propagated from another kernel protocol
through a pipe.
---
 nest/rt-table.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/nest/rt-table.c b/nest/rt-table.c
index e3fd985c..ebdac833 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -906,6 +906,26 @@ rte_update_unlock(void)
     lp_flush(rte_update_pool);
 }
 
+static inline void
+rte_hide_dummy_routes(net *net, rte **dummy)
+{
+  if (net->routes && net->routes->attrs->source == RTS_DUMMY)
+  {
+    *dummy = net->routes;
+    net->routes = (*dummy)->next;
+  }
+}
+
+static inline void
+rte_unhide_dummy_routes(net *net, rte **dummy)
+{
+  if (*dummy)
+  {
+    (*dummy)->next = net->routes;
+    net->routes = *dummy;
+  }
+}
+
 /**
  * rte_update - enter a new update to a routing table
  * @table: table to be updated
@@ -955,6 +975,7 @@ rte_update2(struct announce_hook *ah, net *net, rte *new, struct proto *src)
   struct proto_stats *stats = ah->stats;
   struct filter *filter = ah->in_filter;
   ea_list *tmpa = NULL;
+  rte *dummy = NULL;
 
   rte_update_lock();
   if (new)
@@ -1010,14 +1031,18 @@ rte_update2(struct announce_hook *ah, net *net, rte *new, struct proto *src)
   else
     stats->imp_withdraws_received++;
 
+ recalc:
+  rte_hide_dummy_routes(net, &dummy);
   rte_recalculate(ah, net, new, tmpa, src);
+  rte_unhide_dummy_routes(net, &dummy);
   rte_update_unlock();
   return;
 
-drop:
+ drop:
   rte_free(new);
-  rte_recalculate(ah, net, NULL, NULL, src);
-  rte_update_unlock();
+  new = NULL;
+  tmpa = NULL;
+  goto recalc;
 }
 
 /* Independent call to rte_announce(), used from next hop