1 # Copyright (c) 2019 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """Tap utilities library."""
16 from enum import IntEnum
18 from robot.api import logger
20 from resources.libraries.python.Constants import Constants
21 from resources.libraries.python.InterfaceUtil import InterfaceUtil
22 from resources.libraries.python.L2Util import L2Util
23 from resources.libraries.python.PapiExecutor import PapiSocketExecutor
24 from resources.libraries.python.topology import Topology
27 class TapFlags(IntEnum):
28 """TAP interface flags."""
36 def add_tap_interface(node, tap_name, mac=None):
37 """Add tap interface with name and optionally with MAC.
39 :param node: Node to add tap on.
40 :param tap_name: Tap interface name for linux tap.
41 :param mac: Optional MAC address for VPP tap.
43 :type tap_name: str or unicode
45 :returns: Returns a interface index.
48 if isinstance(tap_name, unicode):
49 tap_name = str(tap_name)
52 id=Constants.BITWISE_NON_ZERO,
53 use_random_mac=False if mac else True,
54 mac_address=L2Util.mac_to_bin(mac) if mac else None,
56 host_mac_addr_set=False,
57 host_ip4_prefix_set=False,
58 host_ip6_prefix_set=False,
59 host_ip4_gw_set=False,
60 host_ip6_gw_set=False,
61 host_namespace_set=False,
62 host_if_name_set=True,
63 host_bridge_set=False,
64 host_if_name=tap_name,
66 err_msg = 'Failed to create tap interface {tap} on host {host}'.format(
67 tap=tap_name, host=node['host'])
69 with PapiSocketExecutor(node) as papi_exec:
70 sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
72 if_key = Topology.add_new_port(node, 'tap')
73 Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
74 Topology.update_interface_name(node, if_key, tap_name)
76 mac = Tap.vpp_get_tap_interface_mac(node, tap_name)
77 Topology.update_interface_mac_address(node, if_key, mac)
78 tap_dev_name = Tap.vpp_get_tap_dev_name(node, tap_name)
79 Topology.update_interface_tap_dev_name(node, if_key, tap_dev_name)
84 def vpp_get_tap_dev_name(node, host_if_name):
85 """Get VPP tap interface name from hardware interfaces dump.
87 :param node: DUT node.
88 :param host_if_name: Tap host interface name.
90 :type host_if_name: str
91 :returns: VPP tap interface dev_name.
94 return Tap.tap_dump(node, host_if_name).get('dev_name')
97 def vpp_get_tap_interface_mac(node, interface_name):
98 """Get tap interface MAC address from interfaces dump.
100 :param node: DUT node.
101 :param interface_name: Tap interface name.
103 :type interface_name: str
104 :returns: Tap interface MAC address.
107 return InterfaceUtil.vpp_get_interface_mac(node, interface_name)
110 def tap_dump(node, name=None):
111 """Get all TAP interface data from the given node, or data about
112 a specific TAP interface.
114 :param node: VPP node to get data from.
115 :param name: Optional name of a specific TAP interface.
118 :returns: Dictionary of information about a specific TAP interface, or
119 a List of dictionaries containing all TAP data for the given node.
122 def process_tap_dump(tap_dump):
125 :param tap_dump: Tap interface dump.
127 :returns: Processed tap interface dump.
130 tap_dump['host_mac_addr'] = str(tap_dump['host_mac_addr'])
131 tap_dump['host_ip4_prefix'] = str(tap_dump['host_ip4_prefix'])
132 tap_dump['host_ip6_prefix'] = str(tap_dump['host_ip6_prefix'])
133 tap_dump['tap_flags'] = tap_dump['tap_flags'].value \
134 if hasattr(tap_dump['tap_flags'], 'value') \
135 else int(tap_dump['tap_flags'])
136 tap_dump['host_namespace'] = None \
137 if tap_dump['host_namespace'] == '(nil)' \
138 else tap_dump['host_namespace']
139 tap_dump['host_bridge'] = None \
140 if tap_dump['host_bridge'] == '(nil)' \
141 else tap_dump['host_bridge']
145 cmd = 'sw_interface_tap_v2_dump'
146 err_msg = 'Failed to get TAP dump on host {host}'.format(
148 with PapiSocketExecutor(node) as papi_exec:
149 details = papi_exec.add(cmd).get_details(err_msg)
151 data = list() if name is None else dict()
154 data.append(process_tap_dump(dump))
155 elif dump.get('host_if_name') == name:
156 data = process_tap_dump(dump)
159 logger.debug('TAP data:\n{tap_data}'.format(tap_data=data))