libimcv: Add generic constructor for PA-TNC attributes

src/libimcv/pa_tnc/pa_tnc_attr_manager.c

@@ -236,6 +236,45 @@ METHOD(pa_tnc_attr_manager_t, create, pa_tnc_attr_t*,
 	return attr;
 }
 
+METHOD(pa_tnc_attr_manager_t, construct, pa_tnc_attr_t*,
+	private_pa_tnc_attr_manager_t *this, pen_t vendor_id, uint32_t type,
+	chunk_t value)
+{
+	enum_name_t *pa_attr_names;
+	pa_tnc_attr_t *attr = NULL;
+	enumerator_t *enumerator;
+	entry_t *entry;
+
+	pa_attr_names = imcv_pa_tnc_attributes->get_names(imcv_pa_tnc_attributes,
+													  vendor_id);
+	if (pa_attr_names)
+	{
+		DBG2(DBG_TNC, "generating PA-TNC attribute type '%N/%N' "
+					  "0x%06x/0x%08x", pen_names, vendor_id,
+					   pa_attr_names, type, vendor_id, type);
+	}
+	else
+	{
+		DBG2(DBG_TNC, "generating PA-TNC attribute type '%N' "
+					  "0x%06x/0x%08x", pen_names, vendor_id,
+					   vendor_id, type);
+	}
+	enumerator = this->list->create_enumerator(this->list);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (entry->vendor_id == vendor_id)
+		{
+			if (entry->attr_create)
+			{
+				attr = entry->attr_create(type, value.len, value);
+			}
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	return attr;
+}
+
 METHOD(pa_tnc_attr_manager_t, destroy, void,
 	private_pa_tnc_attr_manager_t *this)
 {
@@ -256,6 +295,7 @@ pa_tnc_attr_manager_t *pa_tnc_attr_manager_create(void)
 			.remove_vendor = _remove_vendor,
 			.get_names = _get_names,
 			.create = _create,
+			.construct = _construct,
 			.destroy = _destroy,
 		},
 		.list = linked_list_create(),

src/libimcv/pa_tnc/pa_tnc_attr_manager.h

@@ -76,6 +76,17 @@ struct pa_tnc_attr_manager_t {
 							 bool segmented, uint32_t *offset, chunk_t msg_info,
 							 pa_tnc_attr_t **error);
 
+	/**
+	 * Generically construct a PA-TNC attribute from type and data
+	 *
+	 * @param vendor_id		Private Enterprise Number (PEN)
+	 * @param type			PA-TNC attribute type
+	 * @param value			PA-TNC attribute value as encoded data
+	 * @return				PA-TNC attribute object if supported, NULL else
+	 */
+	pa_tnc_attr_t* (*construct)(pa_tnc_attr_manager_t *this, pen_t vendor_id,
+								uint32_t type, chunk_t value);
+
 	/**
 	 * Destroys a pa_tnc_attr_manager_t object.
 	 */