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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.
+
+"""VPP counters utilities library."""
+
+import time
+from topology import NodeType, Topology
+from VatExecutor import VatExecutor, VatTerminal
+from robot.api import logger
+
+
+class VppCounters(object):
+ """VPP counters utilities."""
+
+ def __init__(self):
+ self._stats_table = None
+
+ def vpp_nodes_clear_interface_counters(self, nodes):
+ """Clear interface counters on all VPP nodes in topology.
+
+ :param nodes: Nodes in topology.
+ :type nodes: dict
+ """
+ for node in nodes.values():
+ if node['type'] == NodeType.DUT:
+ self.vpp_clear_interface_counters(node)
+
+ @staticmethod
+ def vpp_clear_interface_counters(node):
+ """Clear interface counters on VPP node.
+
+ :param node: Node to clear interface counters on.
+ :type node: dict
+ """
+ vat = VatExecutor()
+ vat.execute_script('clear_interface.vat', node)
+ vat.script_should_have_passed()
+
+ def vpp_dump_stats_table(self, node):
+ """Dump stats table on VPP node.
+
+ :param node: Node to dump stats table on.
+ :type node: dict
+ :return: Stats table.
+ """
+ vat = VatTerminal(node)
+ vat.vat_terminal_exec_cmd('want_stats enable')
+ for _ in range(0, 12):
+ stats_table = vat.vat_terminal_exec_cmd('dump_stats_table')
+ if_counters = stats_table['interface_counters']
+ if len(if_counters) > 0:
+ self._stats_table = stats_table
+ vat.vat_terminal_close()
+ return stats_table
+ time.sleep(1)
+
+ vat.vat_terminal_close()
+ return None
+
+ def vpp_get_ipv4_interface_counter(self, node, interface):
+ return self.vpp_get_ipv46_interface_counter(node, interface, False)
+
+ def vpp_get_ipv6_interface_counter(self, node, interface):
+ return self.vpp_get_ipv46_interface_counter(node, interface, True)
+
+ def vpp_get_ipv46_interface_counter(self, node, interface, is_ipv6=True):
+ """Return interface IPv4/IPv6 counter
+
+ :param node: Node to get interface IPv4/IPv6 counter on.
+ :param interface: Interface name.
+ :type node: dict
+ :type interface: str
+ :return: Interface IPv4/IPv6 counter.
+ :param is_ipv6: specify IP version
+ :type is_ipv6: bool
+ :rtype: int
+ """
+ version = 'ip6' if is_ipv6 else 'ip4'
+ topo = Topology()
+ if_index = topo.get_interface_sw_index(node, interface)
+ if if_index is None:
+ logger.trace('{i} sw_index not found.'.format(i=interface))
+ return 0
+
+ if_counters = self._stats_table.get('interface_counters')
+ if if_counters is None or len(if_counters) == 0:
+ logger.trace('No interface counters.')
+ return 0
+ for counter in if_counters:
+ if counter['vnet_counter_type'] == version:
+ data = counter['data']
+ return data[if_index]
+ logger.trace('{i} {v} counter not found.'.format(i=interface,
+ v=version))
+ return 0