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+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""DHCP utilities for VPP."""
+
+
+from resources.libraries.python.VatExecutor import VatExecutor
+from resources.libraries.python.topology import Topology
+
+
+class DhcpClient(object):
+ """DHCP Client utilities."""
+
+ @staticmethod
+ def set_dhcp_client_on_interface(vpp_node, interface, hostname=None):
+ """Set DHCP client on interface.
+
+ :param vpp_node: VPP node to set DHCP client on.
+ :param interface: Interface name to set DHCP client on.
+ :param hostname: Hostname used in DHCP DISCOVER.
+ :type vpp_node: dict
+ :type interface: str
+ :type hostname: str
+ :raises RuntimeError: If unable to set DHCP client on interface.
+ """
+ sw_if_index = Topology.get_interface_sw_index(vpp_node, interface)
+ interface = 'sw_if_index {}'.format(sw_if_index)
+ hostname = 'hostname {}'.format(hostname) if hostname else ''
+ output = VatExecutor.cmd_from_template(vpp_node,
+ "dhcp_client.vat",
+ interface=interface,
+ hostname=hostname)
+ output = output[0]
+
+ if output["retval"] != 0:
+ raise RuntimeError('Unable to set DHCP client on node {} and'
+ ' interface {}.'
+ .format(vpp_node, interface))