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# Copyright (c) 2017 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.
"""Memif interface library."""
from resources.libraries.python.ssh import SSH
from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
from resources.libraries.python.topology import Topology
class Memif(object):
"""Memif interface class."""
def __init__(self):
pass
@staticmethod
def create_memif_interface(node, socket, mid, role='master'):
"""Create Memif interface on the given node.
:param node: Given node to create Memif interface on.
:param socket: Memif interface socket path.
:param mid: Memif interface ID.
:param role: Memif interface role [master|slave]. Default is master.
:type node: dict
:type socket: str
:type mid: str
:type role: str
:returns: SW interface index.
:rtype: int
:raises ValueError: If command 'create memif' fails.
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template(
'memif_create.vat',
socket=socket, id=mid, role=role)
if 'sw_if_index' in vat.vat_stdout:
try:
sw_if_idx = int(vat.vat_stdout.split()[4])
if_key = Topology.add_new_port(node, 'memif')
Topology.update_interface_sw_if_index(
node, if_key, sw_if_idx)
ifc_name = Memif.vpp_get_memif_interface_name(
node, sw_if_idx)
Topology.update_interface_name(node, if_key, ifc_name)
ifc_mac = Memif.vpp_get_memif_interface_mac(node, sw_if_idx)
Topology.update_interface_mac_address(node, if_key, ifc_mac)
Topology.update_interface_memif_socket(node, if_key, socket)
Topology.update_interface_memif_id(node, if_key, mid)
Topology.update_interface_memif_role(node, if_key, role)
return sw_if_idx
except KeyError:
raise ValueError('Create Memif interface failed on node '
'{}'.format(node['host']))
else:
raise ValueError('Create Memif interface failed on node '
'{}'.format(node['host']))
@staticmethod
def show_memif(node):
"""Show Memif data for the given node.
:param node: Given node to show Memif data on.
:type node: dict
"""
vat = VatExecutor()
vat.execute_script("memif_dump.vat", node, json_out=False)
@staticmethod
def clear_memif_socks(node, *socks):
"""Clear Memif sockets for the given node.
:param node: Given node to clear Memif sockets on.
:param socks: Memif sockets.
:type node: dict
:type socks: list
"""
ssh = SSH()
ssh.connect(node)
for sock in socks:
ssh.exec_command_sudo('rm -f {}'.format(sock))
@staticmethod
def parse_memif_dump_data(memif_data):
"""Convert Memif data to dictionary.
:param memif_data: Dump of Memif interfaces data.
:type memif_data: str
:returns: Memif interfaces data in dictionary.
:rtype: dict
:raises RuntimeError: If there is no memif interface name found in
provided data.
"""
memif_name = None
memif_dict = dict()
memif_data = str(memif_data)
values = dict()
clutter = ['vat#']
for garbage in clutter:
memif_data = memif_data.replace(garbage, '')
for line in memif_data.splitlines():
if line.startswith('Sending') or len(line) == 0:
continue
elif line.startswith('memif'):
if memif_name:
memif_dict[memif_name] = values
line_split = line.split(':', 1)
memif_name = str(line_split[0])
values = dict()
line = line_split[1]
line_split = line.split()
for i in range(0, len(line_split), 2):
key = str(line_split[i])
try:
value = line_split[i+1]
except IndexError:
value = None
values[key] = value
if memif_name:
memif_dict[memif_name] = values
else:
raise RuntimeError('No memif interface name found')
return memif_dict
@staticmethod
def vpp_get_memif_interface_name(node, sw_if_idx):
"""Get Memif interface name from Memif interfaces dump.
:param node: DUT node.
:param sw_if_idx: DUT node.
:type node: dict
:type sw_if_idx: int
:returns: Memif interface name.
:rtype: str
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('memif_dump.vat')
memif_data = Memif.parse_memif_dump_data(vat.vat_stdout)
for item in memif_data:
if memif_data[item]['sw_if_index'] == str(sw_if_idx):
return item
return None
@staticmethod
def vpp_get_memif_interface_mac(node, sw_if_idx):
"""Get Memif interface MAC address from Memif interfaces dump.
:param node: DUT node.
:param sw_if_idx: DUT node.
:type node: dict
:type sw_if_idx: int
:returns: Memif interface MAC address.
:rtype: str
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('memif_dump.vat')
memif_data = Memif.parse_memif_dump_data(vat.vat_stdout)
for item in memif_data:
if memif_data[item]['sw_if_index'] == str(sw_if_idx):
return memif_data[item].get('mac', None)
@staticmethod
def vpp_get_memif_interface_socket(node, sw_if_idx):
"""Get Memif interface socket path from Memif interfaces dump.
:param node: DUT node.
:param sw_if_idx: DUT node.
:type node: dict
:type sw_if_idx: int
:returns: Memif interface socket path.
:rtype: str
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('memif_dump.vat')
memif_data = Memif.parse_memif_dump_data(vat.vat_stdout)
for item in memif_data:
if memif_data[item]['sw_if_index'] == str(sw_if_idx):
return memif_data[item].get('socket', None)
@staticmethod
def vpp_get_memif_interface_id(node, sw_if_idx):
"""Get Memif interface ID from Memif interfaces dump.
:param node: DUT node.
:param sw_if_idx: DUT node.
:type node: dict
:type sw_if_idx: int
:returns: Memif interface ID.
:rtype: int
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('memif_dump.vat')
memif_data = Memif.parse_memif_dump_data(vat.vat_stdout)
for item in memif_data:
if memif_data[item]['sw_if_index'] == str(sw_if_idx):
return int(memif_data[item].get('id', None))
@staticmethod
def vpp_get_memif_interface_role(node, sw_if_idx):
"""Get Memif interface role from Memif interfaces dump.
:param node: DUT node.
:param sw_if_idx: DUT node.
:type node: dict
:type sw_if_idx: int
:returns: Memif interface role.
:rtype: int
"""
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('memif_dump.vat')
memif_data = Memif.parse_memif_dump_data(vat.vat_stdout)
for item in memif_data:
if memif_data[item]['sw_if_index'] == str(sw_if_idx):
return memif_data[item].get('role', None)
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