1 files changed, 26 insertions, 22 deletions

diff --git a/src/ats/gnunet-service-ats_normalization.c b/src/ats/gnunet-service-ats_normalization.c
index 2d5c07520..ccc67f5f6 100644
--- a/src/ats/gnunet-service-ats_normalization.c
+++ b/src/ats/gnunet-service-ats_normalization.c
@@ -129,7 +129,7 @@ struct PeerRelative
   struct GNUNET_PeerIdentity id;
 };
 
-
+GAS_Normalization_preference_changed_cb pref_changed_cb;
 struct GNUNET_CONTAINER_MultiHashMap *peers;
 struct PreferenceClient *pc_head;
 struct PreferenceClient *pc_tail;
@@ -144,6 +144,7 @@ update_peers (struct GNUNET_PeerIdentity *id,
         struct PreferencePeer *p_cur;
         struct PeerRelative *rp;
         double f_rel_total;
+        double backup;
         unsigned int count;
 
         f_rel_total = 0.0;
@@ -166,33 +167,35 @@ update_peers (struct GNUNET_PeerIdentity *id,
                 }
         }
 
-        if (0 < count)
+        /* Find a client */
+        GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%u clients have a total relative preference for peer `%s''s `%s' of %.3f\n",
+                        count,
+                        GNUNET_i2s (id),
+                        GNUNET_ATS_print_preference_type (kind),
+                        f_rel_total);
+        if (NULL != (rp = GNUNET_CONTAINER_multihashmap_get (peers, &id->hashPubKey)))
         {
-                /* Find a client */
-                f_rel_total /= count;
-                GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%u clients have a total relative preference for peer `%s''s%s is %.3f\n",
-                                count,
-                                GNUNET_i2s (id),
-                                GNUNET_ATS_print_preference_type (kind),
-                                f_rel_total);
-                if (NULL != (rp = GNUNET_CONTAINER_multihashmap_get (peers, &id->hashPubKey)))
+                backup = rp->f_rel[kind];
+                if (0 < count)
                 {
-                        rp->f_rel[kind] = f_rel_total;
+                        rp->f_rel[kind] = f_rel_total / count;
                 }
-                return f_rel_total;
-        }
-        else
-        {
-                GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No clients have a total relative preference for peer `%s''s%s\n",
-                                count,
-                                GNUNET_i2s (id),
-                                GNUNET_ATS_print_preference_type (kind));
-                if (NULL != (rp = GNUNET_CONTAINER_multihashmap_get (peers, &id->hashPubKey)))
+                else
                 {
                         rp->f_rel[kind] = DEFAULT_REL_PREFERENCE;
                 }
+        }
+        else
+        {
                 return DEFAULT_REL_PREFERENCE;
         }
+
+        if ((backup != rp->f_rel[kind]) && (NULL != pref_changed_cb))
+        {
+                pref_changed_cb (&rp->id, kind, rp->f_rel[kind]);
+        }
+
+        return rp->f_rel[kind];
 }
 
 /**
@@ -426,12 +429,13 @@ GAS_normalization_get_preferences (struct GNUNET_PeerIdentity *id)
         return rp->f_rel;
 }
 
+
 void
-GAS_normalization_start ()
+GAS_normalization_start (GAS_Normalization_preference_changed_cb pref_ch_cb)
 {
         int i;
         peers = GNUNET_CONTAINER_multihashmap_create(10, GNUNET_NO);
-
+        pref_changed_cb = pref_ch_cb;
         for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
                 defvalues.f_rel[i] = DEFAULT_REL_PREFERENCE;
         return;