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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.
"""Routing utilities library."""
from resources.libraries.python.VatExecutor import VatTerminal
from resources.libraries.python.topology import Topology
from resources.libraries.python.ssh import exec_cmd_no_error
class Routing(object):
"""Routing utilities."""
@staticmethod
def vpp_route_add(node, network, prefix_len, gateway=None,
interface=None, use_sw_index=True, resolve_attempts=10,
count=1, vrf=None, lookup_vrf=None, multipath=False,
weight=None):
"""Add route to the VPP node.
:param node: Node to add route on.
:param network: Route destination network address.
:param prefix_len: Route destination network prefix length.
:param gateway: Route gateway address.
:param interface: Route interface.
:param vrf: VRF table ID (Optional).
:param use_sw_index: Use sw_if_index in VAT command.
:param resolve_attempts: Resolve attempts IP route add parameter.
:param count: number of IP addresses to add starting from network IP
with same prefix (increment is 1). If None, then is not used.
:param lookup_vrf: VRF table ID for lookup.
:param multipath: Enable multipath routing.
:param weight: Weight value for unequal cost multipath routing.
:type node: dict
:type network: str
:type prefix_len: int
:type gateway: str
:type interface: str
:type use_sw_index: bool
:type resolve_attempts: int
:type count: int
:type vrf: int
:type lookup_vrf: int
:type multipath: bool
:type weight: int
"""
if use_sw_index:
int_cmd = ('sw_if_index {}'.
format(Topology.get_interface_sw_index(node, interface)))
else:
int_cmd = interface
rap = 'resolve-attempts {}'.format(resolve_attempts) \
if resolve_attempts else ''
via = 'via {}'.format(gateway) if gateway else ''
cnt = 'count {}'.format(count) \
if count else ''
vrf = 'vrf {}'.format(vrf) if vrf else ''
lookup_vrf = 'lookup-in-vrf {}'.format(lookup_vrf) if lookup_vrf else ''
multipath = 'multipath' if multipath else ''
weight = 'weight {}'.format(weight) if weight else ''
with VatTerminal(node, json_param=False) as vat:
vat.vat_terminal_exec_cmd_from_template('add_route.vat',
network=network,
prefix_length=prefix_len,
via=via,
vrf=vrf,
interface=int_cmd,
resolve_attempts=rap,
count=cnt,
lookup_vrf=lookup_vrf,
multipath=multipath,
weight=weight)
@staticmethod
def add_fib_table(node, network, prefix_len, fib_id, place):
"""Create new FIB table according to ID.
:param node: Node to add FIB on.
:param network: IP address to add to the FIB table.
:param prefix_len: IP address prefix length.
:param fib_id: FIB table ID.
:param place: Possible variants are local, drop.
:type node: dict
:type network: str
:type prefix_len: int
:type fib_id: int
:type place: str
"""
with VatTerminal(node) as vat:
vat.vat_terminal_exec_cmd_from_template('add_fib_table.vat',
network=network,
prefix_length=prefix_len,
fib_number=fib_id,
where=place)
@staticmethod
def add_route(node, ip_addr, prefix, gateway, namespace=None):
"""Add route in namespace.
:param node: Node where to execute command.
:param ip_addr: Route destination IP address.
:param prefix: IP prefix.
:param namespace: Execute command in namespace. Optional.
:param gateway: Gateway address.
:type node: dict
:type ip_addr: str
:type prefix: int
:type gateway: str
:type namespace: str
"""
if namespace is not None:
cmd = 'ip netns exec {} ip route add {}/{} via {}'.format(
namespace, ip_addr, prefix, gateway)
else:
cmd = 'ip route add {}/{} via {}'.format(ip_addr, prefix, gateway)
exec_cmd_no_error(node, cmd, sudo=True)
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