[HICN-481] Add APIs to trigger MAP-Me updates

Change-Id: I6faefcdcbd6a0e5786b57ca5403804a8fe31dd0d
Signed-off-by: Jordan Augé <jordan.auge+fdio@cisco.com>

4 files changed, 35 insertions, 21 deletions

diff --git a/hicn-light/src/hicn/core/mapme.c b/hicn-light/src/hicn/core/mapme.c
index e426e7575..93a01bb0d 100644
--- a/hicn-light/src/hicn/core/mapme.c
+++ b/hicn-light/src/hicn/core/mapme.c
@@ -480,29 +480,16 @@ static bool mapme_hasLocalNextHops(const MapMe *mapme,
 }
 
 void
-mapme_reconsiderFibEntry(const MapMe *mapme, FibEntry * fibEntry)
+mapme_send_updates(const MapMe * mapme, FibEntry * fibEntry, const NumberSet * nexthops)
 {
-  /*
-   * Skip entries that do not correspond to a producer ( / have a locally
-   * served prefix / have no local connection as next hop)
-   */
-  if (!mapme_hasLocalNextHops(mapme, fibEntry))
-      return;
-
-  /* Apply the policy of the fibEntry over all neighbours */
-  NumberSet * available_nexthops = fibEntry_GetAvailableNextHops(fibEntry, ~0);
-  NumberSet * previous_nexthops = fibEntry_GetPreviousNextHops(fibEntry);
-
   /* Detect change */
-  if (numberSet_Equals(available_nexthops, previous_nexthops)) {
-      numberSet_Release(&available_nexthops);
+  NumberSet * previous_nexthops = fibEntry_GetPreviousNextHops(fibEntry);
+  if (numberSet_Equals(nexthops, previous_nexthops)) {
       INFO(mapme, "[MAP-Me] No change in nexthops");
       return;
   }
-  fibEntry_SetPreviousNextHops(fibEntry, available_nexthops);
-
+  fibEntry_SetPreviousNextHops(fibEntry, nexthops);
 
-  /* Advertise prefix on all available next hops */
   if (!TFIB(fibEntry)) /* Create TFIB associated to FIB entry */
     mapme_CreateTFIB(fibEntry);
   TFIB(fibEntry)->seq++;
@@ -510,14 +497,31 @@ mapme_reconsiderFibEntry(const MapMe *mapme, FibEntry * fibEntry)
   const Name *name = fibEntry_GetPrefix(fibEntry);
   char *name_str = name_ToString(name);
   bool clear_tfib = true;
-  for (size_t j = 0; j < numberSet_Length(available_nexthops); j++) {
-      unsigned nexthop_id = numberSet_GetItem(available_nexthops, j);
+  for (size_t j = 0; j < numberSet_Length(nexthops); j++) {
+      unsigned nexthop_id = numberSet_GetItem(nexthops, j);
       INFO(mapme, "[MAP-Me] sending IU/IN for name %s on connection %d", name_str,
            nexthop_id);
       mapme_setFacePending(mapme, name, fibEntry, nexthop_id, true, true, clear_tfib, 0);
       clear_tfib = false;
   }
   free(name_str);
+}
+
+void
+mapme_reconsiderFibEntry(const MapMe *mapme, FibEntry * fibEntry)
+{
+  /*
+   * Skip entries that do not correspond to a producer ( / have a locally
+   * served prefix / have no local connection as next hop)
+   */
+  if (!mapme_hasLocalNextHops(mapme, fibEntry))
+      return;
+
+  /* Apply the policy of the fibEntry over all neighbours */
+  NumberSet * available_nexthops = fibEntry_GetAvailableNextHops(fibEntry, ~0);
+
+  /* Advertise prefix on all available next hops (if needed) */
+  mapme_send_updates(mapme, fibEntry, available_nexthops);
 
   numberSet_Release(&available_nexthops);
 }
diff --git a/hicn-light/src/hicn/core/mapme.h b/hicn-light/src/hicn/core/mapme.h
index 81977ab2e..503b22568 100644
--- a/hicn-light/src/hicn/core/mapme.h
+++ b/hicn-light/src/hicn/core/mapme.h
@@ -69,6 +69,16 @@ void mapme_Process(const MapMe *mapme, const uint8_t *msgBuffer,
                    unsigned conn_id);
 
 /**
+ * @function mapme_send_updates
+ * @abstract Trigger the update for specified FIB entry and nexthops
+ * @param [in] mapme - Pointer to the MAP-Me data structure.
+ * @param [in] fibEntry - The FIB entry to consider
+ * @param [in] nexthops - NumberSet holding the next hops on which to send the
+ * update.
+ */
+void mapme_send_updates(const MapMe * mapme, FibEntry * fibEntry, const NumberSet * nexthops);
+
+/**
  * @function mapme_reconsiderFibEntry
  * @abstract Process a fib entry for changes that might trigger new updates
  * @param [in] mapme - Pointer to the MAP-Me data structure.
diff --git a/hicn-light/src/hicn/processor/fibEntry.c b/hicn-light/src/hicn/processor/fibEntry.c
index be7278987..2c41f1c7b 100644
--- a/hicn-light/src/hicn/processor/fibEntry.c
+++ b/hicn-light/src/hicn/processor/fibEntry.c
@@ -478,7 +478,7 @@ fibEntry_GetPreviousNextHops(const FibEntry *fibEntry)
 #endif /* WITH_POLICY */
 
 void
-fibEntry_SetPreviousNextHops(FibEntry *fibEntry, NumberSet * nexthops)
+fibEntry_SetPreviousNextHops(FibEntry *fibEntry, const NumberSet * nexthops)
 {
     if (fibEntry->previous_nexthops)
         numberSet_Release(&fibEntry->previous_nexthops);
diff --git a/hicn-light/src/hicn/processor/fibEntry.h b/hicn-light/src/hicn/processor/fibEntry.h
index 1bd917bc2..13f002eb9 100644
--- a/hicn-light/src/hicn/processor/fibEntry.h
+++ b/hicn-light/src/hicn/processor/fibEntry.h
@@ -121,7 +121,7 @@ void fibEntry_SetPolicy(FibEntry *fibEntry, policy_t policy);
 void fibEntry_UpdateStats(FibEntry *fibEntry, uint64_t now);
 NumberSet * fibEntry_GetAvailableNextHops(const FibEntry *fibEntry, unsigned in_connection);
 NumberSet * fibEntry_GetPreviousNextHops(const FibEntry *fibEntry);
-void fibEntry_SetPreviousNextHops(FibEntry *fibEntry, NumberSet * nexthops);
+void fibEntry_SetPreviousNextHops(FibEntry *fibEntry, const NumberSet * nexthops);
 
 void fibEntry_OnTimeout(FibEntry *fibEntry, const NumberSet *egressId);
 const NumberSet *fibEntry_GetNexthopsFromForwardingStrategy(