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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.
"""Vhost-user interfaces library."""
from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
from resources.libraries.python.topology import NodeType
class VhostUser(object):
"""Vhost-user interfaces"""
@staticmethod
def vpp_create_vhost_user_interface(node, socket):
"""Create Vhost-user interface on VPP node.
:param node: Node to create Vhost-user interface on.
:param socket: Vhost-user interface socket path.
:type node: dict
:type socket: str
:return: SW interface index.
:rtype: int
"""
out = VatExecutor.cmd_from_template(node, "create_vhost_user_if.vat",
sock=socket)
if out[0].get('retval') == 0:
return out[0].get('sw_if_index')
else:
raise RuntimeError('Create Vhost-user interface failed on node '
'"{}"'.format(node['host']))
@staticmethod
def get_vhost_user_if_name_by_sock(node, socket):
"""Get Vhost-user interface name by socket.
:param node: Node to get Vhost-user interface name on.
:param socket: Vhost-user interface socket path.
:type node: dict
:type socket: str
:return: Interface name or None if not found.
:rtype: str
"""
for interface in node['interfaces'].values():
if interface.get('socket') == socket:
return interface.get('name')
return None
@staticmethod
def get_vhost_user_mac_by_sw_index(node, sw_if_index):
"""Get Vhost-user l2_address for the given interface from actual
interface dump.
:param node: VPP node to get interface data from.
:param sw_if_index: Idx of the specific interface.
:type node: dict
:type sw_if_index: str
:return: l2_address of the given interface.
:rtype: str
"""
with VatTerminal(node) as vat:
if_data = vat.vat_terminal_exec_cmd_from_template(
"interface_dump.vat")
for iface in if_data[0]:
if iface["sw_if_index"] == sw_if_index:
return ':'.join("%02x" % (b) for b in iface["l2_address"][:6])
return None
@staticmethod
def vpp_show_vhost(node):
"""Get vhost-user data for the given node.
:param node: VPP node to get interface data from.
:type node: dict
:return: nothing
"""
vat = VatExecutor()
vat.execute_script("show_vhost.vat", node, json_out=False)
@staticmethod
def show_vpp_vhost_on_all_duts(nodes):
"""Show Vhost User on all DUTs.
:param nodes: VPP nodes.
:type nodes: dict
"""
for node in nodes.values():
if node['type'] == NodeType.DUT:
VhostUser.vpp_show_vhost(node)
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