+ @staticmethod
+ def get_interface_sw_index_from_json(interface_dump_json, interface_name):
+ """Get sw_if_index from given JSON output by interface name.
+
+ :param interface_dump_json: JSON output from dump_interface_list VAT
+ command.
+ :param interface_name: Interface name.
+ :type interface_dump_json: str
+ :type interface_name: str
+ :returns: SW interface index.
+ :rtype: int
+ :raises ValueError: If interface not found in interface_dump_json.
+ """
+ logger.trace(interface_dump_json)
+ interface_list = JsonParser().parse_data(interface_dump_json)
+ for interface in interface_list:
+ try:
+ if interface['interface_name'] == interface_name:
+ index = interface['sw_if_index']
+ logger.debug('Interface with name {} has sw_if_index {}.'
+ .format(interface_name, index))
+ return index
+ except KeyError:
+ pass
+ raise ValueError('Interface with name {} not found.'
+ .format(interface_name))
+
+ @staticmethod
+ def get_interface_name_from_json(interface_dump_json, sw_if_index):
+ """Get interface name from given JSON output by sw_if_index.
+
+ :param interface_dump_json: JSON output from dump_interface_list VAT
+ command.
+ :param sw_if_index: SW interface index.
+ :type interface_dump_json: str
+ :type sw_if_index: int
+ :returns: Interface name.
+ :rtype: str
+ :raises ValueError: If interface not found in interface_dump_json.
+ """
+ logger.trace(interface_dump_json)
+ interface_list = JsonParser().parse_data(interface_dump_json)
+ for interface in interface_list:
+ try:
+ if interface['sw_if_index'] == sw_if_index:
+ interface_name = interface['interface_name']
+ logger.debug('Interface with sw_if_index {idx} has name'
+ ' {name}.'.format(idx=sw_if_index,
+ name=interface_name))
+ return interface_name
+ except KeyError:
+ pass
+ raise ValueError('Interface with sw_if_index {} not found.'
+ .format(sw_if_index))
+
+ @staticmethod
+ def get_interface_mac_from_json(interface_dump_json, sw_if_index):
+ """Get interface MAC address from given JSON output by sw_if_index.
+
+ :param interface_dump_json: JSON output from dump_interface_list VAT
+ command.
+ :param sw_if_index: SW interface index.
+ :type interface_dump_json: str
+ :type sw_if_index: int
+ :returns: Interface MAC address.
+ :rtype: str
+ :raises ValueError: If interface not found in interface_dump_json.
+ """
+ logger.trace(interface_dump_json)
+ interface_list = JsonParser().parse_data(interface_dump_json)
+ for interface in interface_list:
+ try:
+ if interface['sw_if_index'] == sw_if_index:
+ mac_from_json = interface['l2_address'][:6] \
+ if 'l2_address' in interface.keys() else ''
+ mac_address = ':'.join('{:02x}'.format(item)
+ for item in mac_from_json)
+ logger.debug('Interface with sw_if_index {idx} has MAC'
+ ' address {addr}.'.format(idx=sw_if_index,
+ addr=mac_address))
+ return mac_address
+ except KeyError:
+ pass
+ raise ValueError('Interface with sw_if_index {idx} not found.'
+ .format(idx=sw_if_index))
+