1 # Copyright (c) 2016 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 """IPv4 setup library"""
16 from socket import inet_ntoa
17 from struct import pack
18 from abc import ABCMeta, abstractmethod
20 from robot.api.deco import keyword
22 from resources.libraries.python.ssh import exec_cmd_no_error
23 from resources.libraries.python.Routing import Routing
24 from resources.libraries.python.topology import NodeType, Topology
25 from resources.libraries.python.VatExecutor import VatExecutor
28 class IPv4Node(object):
29 """Abstract class of a node in a topology."""
30 __metaclass__ = ABCMeta
32 def __init__(self, node_info):
33 self.node_info = node_info
36 def _get_netmask(prefix_length):
37 bits = 0xffffffff ^ (1 << 32 - prefix_length) - 1
38 return inet_ntoa(pack('>I', bits))
41 def set_ip(self, interface, address, prefix_length):
42 """Configure IPv4 address on interface.
44 :param interface: Interface name.
45 :param address: IPv4 address.
46 :param prefix_length: IPv4 prefix length.
49 :type prefix_length: int
55 def set_route(self, network, prefix_length, gateway, interface):
56 """Configure IPv4 route.
58 :param network: Network IPv4 address.
59 :param prefix_length: IPv4 prefix length.
60 :param gateway: IPv4 address of the gateway.
61 :param interface: Interface name.
63 :type prefix_length: int
71 def unset_route(self, network, prefix_length, gateway, interface):
72 """Remove specified IPv4 route.
74 :param network: Network IPv4 address.
75 :param prefix_length: IPv4 prefix length.
76 :param gateway: IPv4 address of the gateway.
77 :param interface: Interface name.
79 :type prefix_length: int
87 def flush_ip_addresses(self, interface):
88 """Flush all IPv4 addresses from specified interface.
90 :param interface: Interface name.
97 def ping(self, destination_address, source_interface):
98 """Send an ICMP request to destination node.
100 :param destination_address: Address to send the ICMP request.
101 :param source_interface: Source interface name.
102 :type destination_address: str
103 :type source_interface: str
110 """Traffic generator node"""
111 def __init__(self, node_info):
112 super(Tg, self).__init__(node_info)
114 def _execute(self, cmd):
115 return exec_cmd_no_error(self.node_info, cmd)
117 def _sudo_execute(self, cmd):
118 return exec_cmd_no_error(self.node_info, cmd, sudo=True)
120 def set_ip(self, interface, address, prefix_length):
121 cmd = 'ip -4 addr flush dev {}'.format(interface)
122 self._sudo_execute(cmd)
123 cmd = 'ip addr add {}/{} dev {}'.format(address, prefix_length,
125 self._sudo_execute(cmd)
127 def set_route(self, network, prefix_length, gateway, interface):
128 netmask = self._get_netmask(prefix_length)
129 cmd = 'route add -net {} netmask {} gw {}'.\
130 format(network, netmask, gateway)
131 self._sudo_execute(cmd)
133 def unset_route(self, network, prefix_length, gateway, interface):
134 self._sudo_execute('ip route delete {}/{}'.
135 format(network, prefix_length))
137 def arp_ping(self, destination_address, source_interface):
138 self._sudo_execute('arping -c 1 -I {} {}'.format(source_interface,
139 destination_address))
141 def ping(self, destination_address, source_interface):
142 self._execute('ping -c 1 -w 5 -I {} {}'.format(source_interface,
143 destination_address))
145 def flush_ip_addresses(self, interface):
146 self._sudo_execute('ip addr flush dev {}'.format(interface))
150 """Device under test"""
151 def __init__(self, node_info):
152 super(Dut, self).__init__(node_info)
154 def get_sw_if_index(self, interface):
155 """Get sw_if_index of specified interface from current node.
157 :param interface: Interface name.
159 :return: sw_if_index of the interface or None.
162 return Topology().get_interface_sw_index(self.node_info, interface)
164 def exec_vat(self, script, **args):
165 """Wrapper for VAT executor.
167 :param script: Script to execute.
168 :param args: Parameters to the script.
173 # TODO: check return value
174 VatExecutor.cmd_from_template(self.node_info, script, **args)
176 def set_arp(self, iface_key, ip_address, mac_address):
177 """Set entry in ARP cache.
179 :param iface_key: Interface key.
180 :param ip_address: IP address.
181 :param mac_address: MAC address.
183 :type ip_address: str
184 :type mac_address: str
186 self.exec_vat('add_ip_neighbor.vat',
187 sw_if_index=self.get_sw_if_index(iface_key),
188 ip_address=ip_address, mac_address=mac_address)
190 def set_ip(self, interface, address, prefix_length):
191 self.exec_vat('add_ip_address.vat',
192 sw_if_index=self.get_sw_if_index(interface),
193 address=address, prefix_length=prefix_length)
195 def set_route(self, network, prefix_length, gateway, interface, count=1):
196 Routing.vpp_route_add(self.node_info,
197 network=network, prefix_len=prefix_length,
198 gateway=gateway, interface=interface, count=count)
200 def unset_route(self, network, prefix_length, gateway, interface):
201 self.exec_vat('del_route.vat', network=network,
202 prefix_length=prefix_length, gateway=gateway,
203 sw_if_index=self.get_sw_if_index(interface))
205 def arp_ping(self, destination_address, source_interface):
208 def flush_ip_addresses(self, interface):
209 self.exec_vat('flush_ip_addresses.vat',
210 sw_if_index=self.get_sw_if_index(interface))
212 def ping(self, destination_address, source_interface):
216 def get_node(node_info):
217 """Creates a class instance derived from Node based on type.
219 :param node_info: Dictionary containing information on nodes in topology.
220 :type node_info: dict
221 :return: Class instance that is derived from Node.
223 if node_info['type'] == NodeType.TG:
225 elif node_info['type'] == NodeType.DUT:
226 return Dut(node_info)
228 raise NotImplementedError('Node type "{}" unsupported!'.
229 format(node_info['type']))
232 class IPv4Setup(object):
233 """IPv4 setup in topology."""
236 def vpp_nodes_set_ipv4_addresses(nodes, nodes_addr):
237 """Set IPv4 addresses on all VPP nodes in topology.
239 :param nodes: Nodes of the test topology.
240 :param nodes_addr: Available nodes IPv4 addresses.
242 :type nodes_addr: dict
243 :return: Affected interfaces as list of (node, interface) tuples.
247 for net in nodes_addr.values():
248 for port in net['ports'].values():
249 host = port.get('node')
253 node = topo.get_node_by_hostname(nodes, host)
256 if node['type'] != NodeType.DUT:
258 iface_key = topo.get_interface_by_name(node, port['if'])
259 get_node(node).set_ip(iface_key, port['addr'], net['prefix'])
260 interfaces.append((node, port['if']))
265 @keyword('Get IPv4 address of node "${node}" interface "${port}" '
266 'from "${nodes_addr}"')
267 def get_ip_addr(node, iface_key, nodes_addr):
268 """Return IPv4 address of the node port.
270 :param node: Node in the topology.
271 :param iface_key: Interface key of the node.
272 :param nodes_addr: Nodes IPv4 addresses.
275 :type nodes_addr: dict
276 :return: IPv4 address.
279 interface = Topology.get_interface_name(node, iface_key)
280 for net in nodes_addr.values():
281 for port in net['ports'].values():
282 host = port.get('node')
284 if host == node['host'] and dev == interface:
285 ip = port.get('addr')
290 'Node {n} port {p} IPv4 address is not set'.format(
291 n=node['host'], p=interface))
293 raise Exception('Node {n} port {p} IPv4 address not found.'.format(
294 n=node['host'], p=interface))
297 def setup_arp_on_all_duts(nodes_info, nodes_addr):
298 """For all DUT nodes extract MAC and IP addresses of adjacent
299 interfaces from topology and use them to setup ARP entries.
301 :param nodes_info: Dictionary containing information on all nodes
303 :param nodes_addr: Nodes IPv4 addresses.
304 :type nodes_info: dict
305 :type nodes_addr: dict
307 for node in nodes_info.values():
308 if node['type'] == NodeType.TG:
310 for iface_key in node['interfaces'].keys():
311 adj_node, adj_int = Topology.\
312 get_adjacent_node_and_interface(nodes_info, node, iface_key)
313 ip_address = IPv4Setup.get_ip_addr(adj_node, adj_int,
315 mac_address = Topology.get_interface_mac(adj_node, adj_int)
316 get_node(node).set_arp(iface_key, ip_address, mac_address)
319 def add_arp_on_dut(node, iface_key, ip_address, mac_address):
320 """Set ARP cache entree on DUT node.
322 :param node: VPP Node in the topology.
323 :param iface_key: Interface key.
324 :param ip_address: IP address of the interface.
325 :param mac_address: MAC address of the interface.
328 :type ip_address: str
329 :type mac_address: str
331 get_node(node).set_arp(iface_key, ip_address, mac_address)