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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.
"""SPAN setup library"""
from resources.libraries.python.topology import Topology
from resources.libraries.python.VatExecutor import VatTerminal
# pylint: disable=too-few-public-methods
class SPAN(object):
"""Class contains methods for setting up SPAN mirroring on DUTs."""
def __init__(self):
"""Initializer."""
pass
@staticmethod
def set_span_mirroring(node, src_if, dst_if):
"""Set Span mirroring on the specified node.
:param node: DUT node.
:param src_if: Interface to mirror traffic from.
:param dst_if: Interface to mirror traffic to.
:type node: dict
:type src_if: str
:type dst_if: str
"""
src_if = Topology.get_interface_sw_index(node, src_if)
dst_if = Topology.get_interface_sw_index(node, dst_if)
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('span_create.vat',
src_sw_if_index=src_if,
dst_sw_if_index=dst_if,
)
@staticmethod
def vpp_get_span_configuration(node):
"""Get full SPAN configuration from VPP node.
:param node: DUT node.
:type node: dict
:returns: Full SPAN configuration as list. One list entry for every
source/destination interface pair.
:rtype: list of dict
"""
with VatTerminal(node, json_param=True) as vat:
data = vat.vat_terminal_exec_cmd_from_template('span_dump.vat')
return data[0]
@staticmethod
def vpp_get_span_configuration_by_interface(node, dst_interface,
ret_format="sw_if_index"):
"""Get a list of all interfaces currently being mirrored
to the specified interface.
:param node: DUT node.
:param dst_interface: Name, sw_if_index or key of interface.
:param ret_format: Optional. Desired format of returned interfaces.
:type node: dict
:type dst_interface: str or int
:type ret_format: string
:returns: List of SPAN source interfaces for the provided destination
interface.
:rtype: list
"""
data = SPAN.vpp_get_span_configuration(node)
dst_interface = Topology.convert_interface_reference(
node, dst_interface, "sw_if_index")
src_interfaces = []
for item in data:
if item["dst-if-index"] == dst_interface:
src_interfaces.append(item["src-if-index"])
if ret_format != "sw_if_index":
src_interfaces = [
Topology.convert_interface_reference(
node, interface, ret_format
) for interface in src_interfaces]
return src_interfaces
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