Added retransmissions to the UE's PDCP on re-establishment.

lib/src/upper/pdcp_entity_lte.cc

@@ -84,6 +84,13 @@ void pdcp_entity_lte::reestablish()
   } else {
     // Send status report if required on reestablishment in RLC AM
     send_status_report();
+    // Re-transmit unacknwoledged SDUs
+    std::map<uint32_t, unique_byte_buffer_t> undelivered_sdus = std::move(undelivered_sdus_queue);
+    undelivered_sdus_queue.clear();
+    for (std::map<uint32_t, unique_byte_buffer_t>::iterator it = undelivered_sdus.begin(); it != undelivered_sdus.end();
+         ++it) {
+      write_sdu(std::move(it->second), it->first);
+    }
   }
 }
 
@@ -119,7 +126,7 @@ void pdcp_entity_lte::write_sdu(unique_byte_buffer_t sdu, int upper_sn)
   // PDUs will be removed from the queue, either when the lower layers will report
   // a succesfull transmission or when the discard timer expires.
   // Status report will also use this queue, to know the First Missing SDU (FMS).
-  if (!rlc->rb_is_um(lcid)) {
+  if (is_drb() && !rlc->rb_is_um(lcid)) {
     store_sdu(used_sn, sdu);
   }