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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.
"""SNAT utilities library."""
from resources.libraries.python.VatExecutor import VatTerminal
class SNATUtil(object):
"""This class defines the methods to set SNAT."""
def __init__(self):
pass
@staticmethod
def set_snat_interfaces(node, int_in, int_out):
"""Set inside and outside interfaces for SNAT.
:param node: DUT node.
:param int_in: Inside interface.
:param int_out: Outside interface.
:type node: dict
:type int_in: str
:type int_out: str
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If setting of inside and outside interfaces for
SNAT fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_set_interfaces.vat',
int_in=int_in, int_out=int_out)
return response
except:
raise RuntimeError("Setting of inside and outside interfaces for "
"SNAT failed!")
@staticmethod
def set_snat_deterministic(node, ip_in, subnet_in, ip_out, subnet_out):
"""Set deterministic behaviour of SNAT.
:param node: DUT node.
:param ip_in: Inside IP.
:param subnet_in: Inside IP subnet.
:param ip_out: Outside IP.
:param subnet_out: Outside IP subnet.
:type node: dict
:type ip_in: str
:type subnet_in: str or int
:type ip_out: str
:type subnet_out: str or int
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If setting of deterministic behaviour of SNAT
fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_set_deterministic.vat',
ip_in=ip_in, subnet_in=subnet_in,
ip_out=ip_out, subnet_out=subnet_out)
return response
except:
raise RuntimeError("Setting of deterministic behaviour of SNAT "
"failed!")
@staticmethod
def set_snat_workers(node, lcores):
"""Set SNAT workers.
:param node: DUT node.
:param lcores: list of cores, format: range e.g. 1-5 or list of ranges
e.g.: 1-5,18-22.
:type node: dict
:type lcores: str
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If setting of SNAT workers fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_set_workers.vat', lcores=lcores)
return response
except:
raise RuntimeError("Setting of SNAT workers failed!")
@staticmethod
def show_snat(node):
"""Show the SNAT settings.
:param node: DUT node.
:type node: dict
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If getting of SNAT settings fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_show_snat.vat')
return response
except:
raise RuntimeError("Getting of SNAT settings failed!")
@staticmethod
def show_snat_deterministic_forward(node, ip_addr):
"""Show forward IP address and port(s).
:param node: DUT node.
:param ip_addr: IP address.
:type node: dict
:type ip_addr: str
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If command 'exec snat deterministic forward'
fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_deterministic_forward.vat', ip=ip_addr)
return response
except:
raise RuntimeError("Command 'exec snat deterministic forward {ip}'"
" failed!".format(ip=ip_addr))
@staticmethod
def show_snat_deterministic_reverse(node, ip_addr, port):
"""Show reverse IP address.
:param node: DUT node.
:param ip_addr: IP address.
:param port: Port.
:type node: dict
:type ip_addr: str
:type port: str or int
:returns: Response of the command.
:rtype: str
:raises RuntimeError: If command 'exec snat deterministic reverse'
fails.
"""
try:
with VatTerminal(node, json_param=False) as vat:
response = vat.vat_terminal_exec_cmd_from_template(
'snat/snat_deterministic_reverse.vat',
ip=ip_addr, port=port)
return response
except:
raise RuntimeError(
"Command 'exec snat deterministic reverse {ip}:{port}'"
" failed!".format(ip=ip_addr, port=port))
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