Support UPF - FQDN

src/smf_app/smf_pfcp_association.cpp

@@ -134,6 +134,28 @@ bool pfcp_associations::add_association(
     sa->function_features.first  = true;
     sa->function_features.second = function_features;
   } else {
+    if (node_id.node_id_type == pfcp::NODE_ID_TYPE_FQDN) {
+      Logger::smf_app().info("FQDN, NODE ID %s", node_id.fqdn.c_str());
+    }
+    struct hostent* record = gethostbyname(node_id.fqdn.c_str());
+    if (record == NULL) {
+      Logger::smf_app().info(
+          "Add association with %s: cannot resolve,"
+          " retrying later",
+          node_id.fqdn.c_str());
+      return false;
+    }
+    if (record->h_addrtype == AF_INET) {
+      in_addr* address        = (struct in_addr*) record->h_addr;
+      node_id.node_id_type    = pfcp::NODE_ID_TYPE_IPV4_ADDRESS;
+      node_id.u1.ipv4_address = *address;
+    } else if (record->h_addrtype == AF_INET6) {
+      // TODO
+      return false;
+    } else {
+      return false;
+    }
+
     restore_n4_sessions = false;
     pfcp_association* association =
         new pfcp_association(node_id, recovery_time_stamp, function_features);