-# Copyright (c) 2019 Cisco and/or its affiliates.
+# Copyright (c) 2021 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:
"""NAT utilities library."""
+from math import log2, modf
from pprint import pformat
-from socket import AF_INET, inet_pton
-
from enum import IntEnum
+from ipaddress import IPv4Address
from robot.api import logger
+from resources.libraries.python.Constants import Constants
from resources.libraries.python.InterfaceUtil import InterfaceUtil
-from resources.libraries.python.PapiExecutor import PapiExecutor
+from resources.libraries.python.topology import Topology
+from resources.libraries.python.PapiExecutor import PapiSocketExecutor
-class NATConfigFlags(IntEnum):
- """Common NAT plugin APIs"""
+class NatConfigFlags(IntEnum):
+ """NAT plugin configuration flags"""
NAT_IS_NONE = 0x00
NAT_IS_TWICE_NAT = 0x01
NAT_IS_SELF_TWICE_NAT = 0x02
NAT_IS_EXT_HOST_VALID = 0x80
-class NATUtil(object):
+class Nat44ConfigFlags(IntEnum):
+ """NAT44 configuration flags"""
+ NAT44_IS_ENDPOINT_INDEPENDENT = 0x00
+ NAT44_IS_ENDPOINT_DEPENDENT = 0x01
+ NAT44_IS_STATIC_MAPPING_ONLY = 0x02
+ NAT44_IS_CONNECTION_TRACKING = 0x04
+ NAT44_IS_OUT2IN_DPO = 0x08
+
+
+class NatAddrPortAllocAlg(IntEnum):
+ """NAT Address and port assignment algorithms."""
+ NAT_ALLOC_ALG_DEFAULT = 0
+ NAT_ALLOC_ALG_MAP_E = 1
+ NAT_ALLOC_ALG_PORT_RANGE = 2
+
+
+class NATUtil:
"""This class defines the methods to set NAT."""
def __init__(self):
pass
+ @staticmethod
+ def enable_nat44_plugin(
+ node, inside_vrf=0, outside_vrf=0, users=0, user_memory=0,
+ sessions=0, session_memory=0, user_sessions=0, mode=u""):
+ """Enable NAT44 plugin.
+
+ :param node: DUT node.
+ :param inside_vrf: Inside VRF ID.
+ :param outside_vrf: Outside VRF ID.
+ :param users: Maximum number of users. Used only in endpoint-independent
+ mode.
+ :param user_memory: User memory size - overwrite auto calculated hash
+ allocation parameter if non-zero.
+ :param sessions: Maximum number of sessions.
+ :param session_memory: Session memory size - overwrite auto calculated
+ hash allocation parameter if non-zero.
+ :param user_sessions: Maximum number of sessions per user. Used only in
+ endpoint-independent mode.
+ :param mode: NAT44 mode. Valid values:
+ - endpoint-independent
+ - endpoint-dependent
+ - static-mapping-only
+ - connection-tracking
+ - out2in-dpo
+ :type node: dict
+ :type inside_vrf: str or int
+ :type outside_vrf: str or int
+ :type users: str or int
+ :type user_memory: str or int
+ :type sessions: str or int
+ :type session_memory: str or int
+ :type user_sessions: str or int
+ :type mode: str
+ """
+ cmd = u"nat44_plugin_enable_disable"
+ err_msg = f"Failed to enable NAT44 plugin on the host {node[u'host']}!"
+ args_in = dict(
+ enable=True,
+ inside_vrf=int(inside_vrf),
+ outside_vrf=int(outside_vrf),
+ users=int(users),
+ user_memory=int(user_memory),
+ sessions=int(sessions),
+ session_memory=int(session_memory),
+ user_sessions=int(user_sessions),
+ flags=getattr(
+ Nat44ConfigFlags,
+ f"NAT44_IS_{mode.replace(u'-', u'_').upper()}"
+ ).value
+ )
+
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
+
+ @staticmethod
+ def set_nat44_interface(node, interface, flag):
+ """Set inside and outside interfaces for NAT44.
+
+ :param node: DUT node.
+ :param interface: NAT44 interface.
+ :param flag: Interface NAT configuration flag name.
+ :type node: dict
+ :type interface: str
+ :type flag: str
+ """
+ cmd = u"nat44_interface_add_del_feature"
+
+ err_msg = f"Failed to set {flag} interface {interface} for NAT44 " \
+ f"on host {node[u'host']}"
+ args_in = dict(
+ sw_if_index=InterfaceUtil.get_sw_if_index(node, interface),
+ is_add=1,
+ flags=getattr(NatConfigFlags, flag).value
+ )
+
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
+
@staticmethod
def set_nat44_interfaces(node, int_in, int_out):
"""Set inside and outside interfaces for NAT44.
:type int_in: str
:type int_out: str
"""
+ NATUtil.set_nat44_interface(node, int_in, u"NAT_IS_INSIDE")
+ NATUtil.set_nat44_interface(node, int_out, u"NAT_IS_OUTSIDE")
+
+ @staticmethod
+ def set_nat44_address_range(
+ node, start_ip, end_ip, vrf_id=Constants.BITWISE_NON_ZERO,
+ flag=u"NAT_IS_NONE"):
+ """Set NAT44 address range.
- cmd = 'nat44_interface_add_del_feature'
+ The return value is a callable (zero argument Python function)
+ which can be used to reset NAT state, so repeated trial measurements
+ hit the same slow path.
- int_in_idx = InterfaceUtil.get_sw_if_index(node, int_in)
- err_msg = 'Failed to set inside interface {int} for NAT44 on host ' \
- '{host}'.format(int=int_in, host=node['host'])
+ :param node: DUT node.
+ :param start_ip: IP range start.
+ :param end_ip: IP range end.
+ :param vrf_id: VRF index (Optional).
+ :param flag: NAT flag name.
+ :type node: dict
+ :type start_ip: str
+ :type end_ip: str
+ :type vrf_id: int
+ :type flag: str
+ :returns: Resetter of the NAT state.
+ :rtype: Callable[[], None]
+ """
+ cmd = u"nat44_add_del_address_range"
+ err_msg = f"Failed to set NAT44 address range on host {node[u'host']}"
args_in = dict(
- sw_if_index=int_in_idx,
- is_add=1,
- flags=getattr(NATConfigFlags, "NAT_IS_INSIDE").value
+ is_add=True,
+ first_ip_address=IPv4Address(str(start_ip)).packed,
+ last_ip_address=IPv4Address(str(end_ip)).packed,
+ vrf_id=vrf_id,
+ flags=getattr(NatConfigFlags, flag).value
)
- with PapiExecutor(node) as papi_exec:
- papi_exec.add(cmd, **args_in).get_replies(err_msg).\
- verify_reply(err_msg=err_msg)
- int_out_idx = InterfaceUtil.get_sw_if_index(node, int_out)
- err_msg = 'Failed to set outside interface {int} for NAT44 on host ' \
- '{host}'.format(int=int_out, host=node['host'])
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
+
+ # A closure, accessing the variables above.
+ def resetter():
+ """Delete and re-add the NAT range setting."""
+ with PapiSocketExecutor(node) as papi_exec:
+ args_in[u"is_add"] = False
+ papi_exec.add(cmd, **args_in)
+ args_in[u"is_add"] = True
+ papi_exec.add(cmd, **args_in)
+ papi_exec.get_replies(err_msg)
+
+ return resetter
+
+ @staticmethod
+ def show_nat44_config(node):
+ """Show the NAT44 plugin running configuration.
+
+ :param node: DUT node.
+ :type node: dict
+ """
+ cmd = u"nat44_show_running_config"
+ err_msg = f"Failed to get NAT44 configuration on host {node[u'host']}"
+
+ with PapiSocketExecutor(node) as papi_exec:
+ reply = papi_exec.add(cmd).get_reply(err_msg)
+
+ logger.debug(f"NAT44 Configuration:\n{pformat(reply)}")
+
+ @staticmethod
+ def show_nat44_summary(node):
+ """Show NAT44 summary on the specified topology node.
+
+ :param node: Topology node.
+ :type node: dict
+ :returns: NAT44 summary data.
+ :rtype: str
+ """
+ return PapiSocketExecutor.run_cli_cmd(node, u"show nat44 summary")
+
+ @staticmethod
+ def show_nat_base_data(node):
+ """Show the NAT base data.
+
+ Used data sources:
+
+ nat_worker_dump
+ nat44_interface_addr_dump
+ nat44_address_dump
+ nat44_static_mapping_dump
+ nat44_interface_dump
+
+ :param node: DUT node.
+ :type node: dict
+ """
+ cmds = [
+ u"nat_worker_dump",
+ u"nat44_interface_addr_dump",
+ u"nat44_address_dump",
+ u"nat44_static_mapping_dump",
+ u"nat44_interface_dump",
+ ]
+ PapiSocketExecutor.dump_and_log(node, cmds)
+
+ @staticmethod
+ def show_nat_user_data(node):
+ """Show the NAT user data.
+
+ Used data sources:
+
+ nat44_user_dump
+ nat44_user_session_dump
+
+ :param node: DUT node.
+ :type node: dict
+ """
+ cmds = [
+ u"nat44_user_dump",
+ u"nat44_user_session_dump",
+ ]
+ PapiSocketExecutor.dump_and_log(node, cmds)
+
+ @staticmethod
+ def compute_max_translations_per_thread(sessions, threads):
+ """Compute value of max_translations_per_thread NAT44 parameter based on
+ total number of worker threads.
+
+ :param sessions: Required number of NAT44 sessions.
+ :param threads: Number of worker threads.
+ :type sessions: int
+ :type threads: int
+ :returns: Value of max_translations_per_thread NAT44 parameter.
+ :rtype: int
+ """
+ # vpp-device tests have not dedicated physical core so
+ # ${dp_count_int} == 0 but we need to use one thread
+ threads = 1 if not int(threads) else int(threads)
+ rest, mult = modf(log2(sessions/(10*threads)))
+ return 2 ** (int(mult) + (1 if rest else 0)) * 10
+
+ @staticmethod
+ def get_nat44_sessions_number(node, proto):
+ """Get number of established NAT44 sessions from actual NAT44 mapping
+ data.
+
+ :param node: DUT node.
+ :param proto: Required protocol - TCP/UDP/ICMP.
+ :type node: dict
+ :type proto: str
+ :returns: Number of established NAT44 sessions.
+ :rtype: int
+ :raises ValueError: If not supported protocol.
+ """
+ nat44_data = dict()
+ if proto in [u"UDP", u"TCP", u"ICMP"]:
+ for line in NATUtil.show_nat44_summary(node).splitlines():
+ sum_k, sum_v = line.split(u":") if u":" in line \
+ else (line, None)
+ nat44_data[sum_k] = sum_v.strip() if isinstance(sum_v, str) \
+ else sum_v
+ else:
+ raise ValueError(f"Unsupported protocol: {proto}!")
+ return nat44_data.get(f"total {proto.lower()} sessions", 0)
+
+ # DET44 PAPI calls
+ # DET44 means deterministic mode of NAT44
+ @staticmethod
+ def enable_det44_plugin(node, inside_vrf=0, outside_vrf=0):
+ """Enable DET44 plugin.
+
+ :param node: DUT node.
+ :param inside_vrf: Inside VRF ID.
+ :param outside_vrf: Outside VRF ID.
+ :type node: dict
+ :type inside_vrf: str or int
+ :type outside_vrf: str or int
+ """
+ cmd = u"det44_plugin_enable_disable"
+ err_msg = f"Failed to enable DET44 plugin on the host {node[u'host']}!"
args_in = dict(
- sw_if_index=int_out_idx,
- is_add=1,
- flags=getattr(NATConfigFlags, "NAT_IS_OUTSIDE").value
+ enable=True,
+ inside_vrf=int(inside_vrf),
+ outside_vrf=int(outside_vrf)
+ )
+
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
+
+ @staticmethod
+ def set_det44_interface(node, if_key, is_inside):
+ """Enable DET44 feature on the interface.
+
+ :param node: DUT node.
+ :param if_key: Interface key from topology file of interface
+ to enable DET44 feature on.
+ :param is_inside: True if interface is inside, False if outside.
+ :type node: dict
+ :type if_key: str
+ :type is_inside: bool
+ """
+ cmd = u"det44_interface_add_del_feature"
+ err_msg = f"Failed to enable DET44 feature on the interface {if_key} " \
+ f"on the host {node[u'host']}!"
+ args_in = dict(
+ is_add=True,
+ is_inside=is_inside,
+ sw_if_index=Topology.get_interface_sw_index(node, if_key)
)
- with PapiExecutor(node) as papi_exec:
- papi_exec.add(cmd, **args_in).get_replies(err_msg). \
- verify_reply(err_msg=err_msg)
+
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
@staticmethod
- def set_nat44_deterministic(node, ip_in, subnet_in, ip_out, subnet_out):
- """Set deterministic behaviour of NAT44.
+ def set_det44_mapping(node, ip_in, subnet_in, ip_out, subnet_out):
+ """Set DET44 mapping.
+
+ The return value is a callable (zero argument Python function)
+ which can be used to reset NAT state, so repeated trial measurements
+ hit the same slow path.
:param node: DUT node.
:param ip_in: Inside IP.
:type ip_out: str
:type subnet_out: str or int
"""
-
- cmd = 'nat_det_add_del_map'
- err_msg = 'Failed to set deterministic behaviour of NAT on host ' \
- '{host}'.format(host=node['host'])
+ cmd = u"det44_add_del_map"
+ err_msg = f"Failed to set DET44 mapping on the host {node[u'host']}!"
args_in = dict(
is_add=True,
- in_addr=inet_pton(AF_INET, str(ip_in)),
+ in_addr=IPv4Address(str(ip_in)).packed,
in_plen=int(subnet_in),
- out_addr=inet_pton(AF_INET, str(ip_out)),
+ out_addr=IPv4Address(str(ip_out)).packed,
out_plen=int(subnet_out)
)
- with PapiExecutor(node) as papi_exec:
- papi_exec.add(cmd, **args_in).get_replies(err_msg). \
- verify_reply(err_msg=err_msg)
+
+ with PapiSocketExecutor(node) as papi_exec:
+ papi_exec.add(cmd, **args_in).get_reply(err_msg)
+
+ # A closure, accessing the variables above.
+ def resetter():
+ """Delete and re-add the deterministic NAT mapping."""
+ with PapiSocketExecutor(node) as papi_exec:
+ args_in[u"is_add"] = False
+ papi_exec.add(cmd, **args_in)
+ args_in[u"is_add"] = True
+ papi_exec.add(cmd, **args_in)
+ papi_exec.get_replies(err_msg)
+
+ return resetter
@staticmethod
- def show_nat(node):
- """Show the NAT configuration and data.
+ def get_det44_mapping(node):
+ """Get DET44 mapping data.
- Used data sources:
+ :param node: DUT node.
+ :type node: dict
+ :returns: Dictionary of DET44 mapping data.
+ :rtype: dict
+ """
+ cmd = u"det44_map_dump"
+ err_msg = f"Failed to get DET44 mapping data on the host " \
+ f"{node[u'host']}!"
+ args_in = dict()
+ with PapiSocketExecutor(node) as papi_exec:
+ details = papi_exec.add(cmd, **args_in).get_reply(err_msg)
- nat_show_config
- nat_worker_dump
- nat44_interface_addr_dump
- nat44_address_dump
- nat44_static_mapping_dump
- nat44_user_dump
- nat44_interface_dump
- nat44_user_session_dump
- nat_det_map_dump
+ return details
+ @staticmethod
+ def get_det44_sessions_number(node):
+ """Get number of established DET44 sessions from actual DET44 mapping
+ data.
:param node: DUT node.
:type node: dict
+ :returns: Number of established DET44 sessions.
+ :rtype: int
"""
+ det44_data = NATUtil.get_det44_mapping(node)
+ return det44_data.get(u"ses_num", 0)
+
+ @staticmethod
+ def show_det44(node):
+ """Show DET44 data.
+
+ Used data sources:
- cmd = 'nat_show_config'
- err_msg = 'Failed to get NAT configuration on host {host}'.\
- format(host=node['host'])
- with PapiExecutor(node) as papi_exec:
- data = papi_exec.add(cmd).get_replies(err_msg).\
- verify_reply(err_msg=err_msg)
- logger.debug("NAT Configuration:\n{data}".format(data=pformat(data)))
+ det44_interface_dump
+ det44_map_dump
+ det44_session_dump
+ :param node: DUT node.
+ :type node: dict
+ """
cmds = [
- "nat_worker_dump",
- "nat44_interface_addr_dump",
- "nat44_address_dump",
- "nat44_static_mapping_dump",
- "nat44_user_dump",
- "nat44_interface_dump",
- "nat44_user_session_dump",
- "nat_det_map_dump"
+ u"det44_interface_dump",
+ u"det44_map_dump",
+ u"det44_session_dump",
]
- PapiExecutor.dump_and_log(node, cmds)
+ PapiSocketExecutor.dump_and_log(node, cmds)
Code Review / csit.git / blobdiff