fix(smf): UPF selection for non PCC rules

Signed-off-by: Stefan Spettel <stefan.spettel@eurecom.fr>

src/smf_app/smf_pfcp_association.cpp

@@ -108,6 +108,7 @@ bool edge::serves_network(
     dnn_item.dnn = dnn;
     auto dnn_it  = snssai_it->dnn_upf_info_list.find(dnn_item);
     if (dnn_it != snssai_it->dnn_upf_info_list.end()) {
+      if (!dnais.empty()) {
         // should be only 1 DNAI
         for (const auto& dnai : dnn_it->dnai_list) {
           // O(1)
@@ -117,6 +118,9 @@ bool edge::serves_network(
             return true;
           }
         }
+      } else {
+        return true;
+      }
     }
   }
   return false;