path: root/resources/libraries/python/TestConfig.py

# Copyright (c) 2019 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.

"""Special test configurations library."""

from ipaddress import ip_address, AddressValueError
from robot.api import logger

from resources.libraries.python.Constants import Constants
from resources.libraries.python.InterfaceUtil import InterfaceUtil
from resources.libraries.python.IPUtil import IPUtil
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.topology import Topology
from resources.libraries.python.VatExecutor import VatExecutor


class TestConfig(object):
    """Contains special test configurations implemented in python for faster
    execution."""

    @staticmethod
    def vpp_create_multiple_vxlan_ipv4_tunnels(
            node, node_vxlan_if, node_vlan_if, op_node, op_node_if,
            n_tunnels, vni_start, src_ip_start, dst_ip_start, ip_step,
            bd_id_start):
        """Create multiple VXLAN tunnel interfaces and VLAN sub-interfaces on
        VPP node.

        Put each pair of VXLAN tunnel interface and VLAN sub-interface to
        separate bridge-domain.

        :param node: VPP node to create VXLAN tunnel interfaces.
        :param node_vxlan_if: VPP node interface key to create VXLAN tunnel
            interfaces.
        :param node_vlan_if: VPP node interface key to create VLAN
            sub-interface.
        :param op_node: Opposite VPP node for VXLAN tunnel interfaces.
        :param op_node_if: Opposite VPP node interface key for VXLAN tunnel
            interfaces.
        :param n_tunnels: Number of tunnel interfaces to create.
        :param vni_start: VNI start ID.
        :param src_ip_start: VXLAN tunnel source IP address start.
        :param dst_ip_start: VXLAN tunnel destination IP address start.
        :param ip_step: IP address incremental step.
        :param bd_id_start: Bridge-domain ID start.
        :type node: dict
        :type node_vxlan_if: str
        :type node_vlan_if: str
        :type op_node: dict
        :type op_node_if: str
        :type n_tunnels: int
        :type vni_start: int
        :type src_ip_start: str
        :type dst_ip_start: str
        :type ip_step: int
        :type bd_id_start: int
        """
        # configure IPs, create VXLAN interfaces and VLAN sub-interfaces
        vxlan_count = TestConfig.vpp_create_vxlan_and_vlan_interfaces(
            node, node_vxlan_if, node_vlan_if, n_tunnels, vni_start,
            src_ip_start, dst_ip_start, ip_step)

        # update topology with VXLAN interfaces and VLAN sub-interfaces data
        # and put interfaces up
        TestConfig.vpp_put_vxlan_and_vlan_interfaces_up(
            node, vxlan_count, node_vlan_if)

        # configure bridge domains, ARPs and routes
        TestConfig.vpp_put_vxlan_and_vlan_interfaces_to_bridge_domain(
            node, node_vxlan_if, vxlan_count, op_node, op_node_if, dst_ip_start,
            ip_step, bd_id_start)

    @staticmethod
    def vpp_create_vxlan_and_vlan_interfaces(
            node, node_vxlan_if, node_vlan_if, vxlan_count, vni_start,
            src_ip_start, dst_ip_start, ip_step):
        """
        Configure IPs, create VXLAN interfaces and VLAN sub-interfaces on VPP
        node.

        :param node: VPP node.
        :param node_vxlan_if: VPP node interface key to create VXLAN tunnel
            interfaces.
        :param node_vlan_if: VPP node interface key to create VLAN
            sub-interface.
        :param vxlan_count: Number of tunnel interfaces to create.
        :param vni_start: VNI start ID.
        :param src_ip_start: VXLAN tunnel source IP address start.
        :param dst_ip_start: VXLAN tunnel destination IP address start.
        :param ip_step: IP address incremental step.
        :type node: dict
        :type node_vxlan_if: str
        :type node_vlan_if: str
        :type vxlan_count: int
        :type vni_start: int
        :type src_ip_start: str
        :type dst_ip_start: str
        :type ip_step: int
        :returns: Number of created VXLAN interfaces.
        :rtype: int
        """
        src_ip_addr_start = ip_address(unicode(src_ip_start))
        dst_ip_addr_start = ip_address(unicode(dst_ip_start))

        if vxlan_count > 10:
            commands = list()
            tmp_fn = '/tmp/create_vxlan_interfaces.config'
            for i in xrange(0, vxlan_count):
                try:
                    src_ip = src_ip_addr_start + i * ip_step
                    dst_ip = dst_ip_addr_start + i * ip_step
                except AddressValueError:
                    logger.warn("Can't do more iterations - IP address limit "
                                "has been reached.")
                    vxlan_count = i
                    break
                commands.append(
                    'sw_interface_add_del_address sw_if_index {sw_idx} '
                    '{ip}/{ip_len}\n'.format(
                        sw_idx=Topology.get_interface_sw_index(
                            node, node_vxlan_if),
                        ip=src_ip,
                        ip_len=128 if src_ip.version == 6 else 32))
                commands.append(
                    'vxlan_add_del_tunnel src {srcip} dst {dstip} vni {vni}\n'\
                        .format(srcip=src_ip, dstip=dst_ip,
                                vni=vni_start + i))
                commands.append(
                    'create_vlan_subif sw_if_index {sw_idx} vlan {vlan}\n'\
                        .format(sw_idx=Topology.get_interface_sw_index(
                            node, node_vlan_if), vlan=i + 1))
            VatExecutor().write_and_execute_script(node, tmp_fn, commands)
            return vxlan_count

        cmd1 = 'sw_interface_add_del_address'
        args1 = dict(
            sw_if_index=InterfaceUtil.get_interface_index(node, node_vxlan_if),
            is_add=1,
            is_ipv6=1 if src_ip_addr_start.version == 6 else 0,
            del_all=0,
            address_length=128 if src_ip_addr_start.version == 6 else 32,
            address=None)
        cmd2 = 'vxlan_add_del_tunnel'
        args2 = dict(
            is_add=1,
            is_ipv6=0,
            instance=Constants.BITWISE_NON_ZERO,
            src_address=None,
            dst_address=None,
            mcast_sw_if_index=Constants.BITWISE_NON_ZERO,
            encap_vrf_id=0,
            decap_next_index=Constants.BITWISE_NON_ZERO,
            vni=None)
        cmd3 = 'create_vlan_subif'
        args3 = dict(
            sw_if_index=InterfaceUtil.get_interface_index(
                node, node_vlan_if),
            vlan_id=None)
        err_msg = 'Failed to create VXLAN and VLAN interfaces on host {host}'.\
            format(host=node['host'])

        with PapiSocketExecutor(node) as papi_exec:
            for i in xrange(0, vxlan_count):
                try:
                    src_ip = src_ip_addr_start + i * ip_step
                    dst_ip = dst_ip_addr_start + i * ip_step
                except AddressValueError:
                    logger.warn("Can't do more iterations - IP address limit "
                                "has been reached.")
                    vxlan_count = i
                    break
                args1['address'] = getattr(src_ip, 'packed')
                args2['src_address'] = getattr(src_ip, 'packed')
                args2['dst_address'] = getattr(dst_ip, 'packed')
                args2['vni'] = int(vni_start) + i
                args3['vlan_id'] = i + 1
                history = False if 1 < i < vxlan_count else True
                papi_exec.add(cmd1, history=history, **args1).\
                    add(cmd2, history=history, **args2).\
                    add(cmd3, history=history, **args3)
            papi_exec.get_replies()

        return vxlan_count

    @staticmethod
    def vpp_put_vxlan_and_vlan_interfaces_up(node, vxlan_count, node_vlan_if):
        """
        Update topology with VXLAN interfaces and VLAN sub-interfaces data
        and put interfaces up.

        :param node: VPP node.
        :param vxlan_count: Number of tunnel interfaces.
        :param node_vlan_if: VPP node interface key where VLAN sub-interfaces
            have been created.
        :type node: dict
        :type vxlan_count: int
        :type node_vlan_if: str
        """
        if_data = InterfaceUtil.vpp_get_interface_data(node)
        vlan_if_name = Topology.get_interface_name(node, node_vlan_if)

        if vxlan_count > 10:
            tmp_fn = '/tmp/put_subinterfaces_up.config'
            commands = list()
            for i in xrange(0, vxlan_count):
                vxlan_subif_key = Topology.add_new_port(node, 'vxlan_tunnel')
                vxlan_subif_name = 'vxlan_tunnel{nr}'.format(nr=i)
                vxlan_found = False
                vxlan_subif_idx = None
                vlan_subif_key = Topology.add_new_port(node, 'vlan_subif')
                vlan_subif_name = '{if_name}.{vlan}'.format(
                    if_name=vlan_if_name, vlan=i + 1)
                vlan_found = False
                vlan_idx = None
                for data in if_data:
                    if_name = data['interface_name']
                    if not vxlan_found and if_name == vxlan_subif_name:
                        vxlan_subif_idx = data['sw_if_index']
                        vxlan_found = True
                    elif not vlan_found and if_name == vlan_subif_name:
                        vlan_idx = data['sw_if_index']
                        vlan_found = True
                    if vxlan_found and vlan_found:
                        break
                Topology.update_interface_sw_if_index(
                    node, vxlan_subif_key, vxlan_subif_idx)
                Topology.update_interface_name(
                    node, vxlan_subif_key, vxlan_subif_name)
                commands.append(
                    'sw_interface_set_flags sw_if_index {sw_idx} admin-up '
                    'link-up\n'.format(sw_idx=vxlan_subif_idx))
                Topology.update_interface_sw_if_index(
                    node, vlan_subif_key, vlan_idx)
                Topology.update_interface_name(
                    node, vlan_subif_key, vlan_subif_name)
                commands.append(
                    'sw_interface_set_flags sw_if_index {sw_idx} admin-up '
                    'link-up\n'.format(sw_idx=vlan_idx))
            VatExecutor().write_and_execute_script(node, tmp_fn, commands)
            return

        cmd = 'sw_interface_set_flags'
        args1 = dict(
            sw_if_index=None,
            admin_up_down=1)
        args2 = dict(
            sw_if_index=None,
            admin_up_down=1)
        err_msg = 'Failed to put VXLAN and VLAN interfaces up on host {host}'. \
            format(host=node['host'])

        with PapiSocketExecutor(node) as papi_exec:
            for i in xrange(0, vxlan_count):
                vxlan_subif_key = Topology.add_new_port(node, 'vxlan_tunnel')
                vxlan_subif_name = 'vxlan_tunnel{nr}'.format(nr=i)
                vxlan_found = False
                vxlan_subif_idx = None
                vlan_subif_key = Topology.add_new_port(node, 'vlan_subif')
                vlan_subif_name = '{if_name}.{vlan}'.format(
                    if_name=vlan_if_name, vlan=i+1)
                vlan_found = False
                vlan_idx = None
                for data in if_data:
                    if not vxlan_found \
                            and data['interface_name'] == vxlan_subif_name:
                        vxlan_subif_idx = data['sw_if_index']
                        vxlan_found = True
                    elif not vlan_found \
                            and data['interface_name'] == vlan_subif_name:
                        vlan_idx = data['sw_if_index']
                        vlan_found = True
                    if vxlan_found and vlan_found:
                        break
                Topology.update_interface_sw_if_index(
                    node, vxlan_subif_key, vxlan_subif_idx)
                Topology.update_interface_name(
                    node, vxlan_subif_key, vxlan_subif_name)
                args1['sw_if_index'] = vxlan_subif_idx
                Topology.update_interface_sw_if_index(
                    node, vlan_subif_key, vlan_idx)
                Topology.update_interface_name(
                    node, vlan_subif_key, vlan_subif_name)
                args2['sw_if_index'] = vlan_idx
                history = False if 1 < i < vxlan_count else True
                papi_exec.add(cmd, history=history, **args1). \
                    add(cmd, history=history, **args2)
                papi_exec.add(cmd, **args1).add(cmd, **args2)
            papi_exec.get_replies()

    @staticmethod
    def vpp_put_vxlan_and_vlan_interfaces_to_bridge_domain(
            node, node_vxlan_if, vxlan_count, op_node, op_node_if, dst_ip_start,
            ip_step, bd_id_start):
        """
        Configure ARPs and routes for VXLAN interfaces and put each pair of
        VXLAN tunnel interface and VLAN sub-interface to separate bridge-domain.

        :param node: VPP node.
        :param node_vxlan_if: VPP node interface key where VXLAN tunnel
            interfaces have been created.
        :param vxlan_count: Number of tunnel interfaces.
        :param op_node: Opposite VPP node for VXLAN tunnel interfaces.
        :param op_node_if: Opposite VPP node interface key for VXLAN tunnel
            interfaces.
        :param dst_ip_start: VXLAN tunnel destination IP address start.
        :param ip_step: IP address incremental step.
        :param bd_id_start: Bridge-domain ID start.
        :type node: dict
        :type node_vxlan_if: str
        :type vxlan_count: int
        :type op_node: dict
        :type op_node_if:
        :type dst_ip_start: str
        :type ip_step: int
        :type bd_id_start: int
        """
        dst_ip_addr_start = ip_address(unicode(dst_ip_start))

        if vxlan_count > 1:
            sw_idx_vxlan = Topology.get_interface_sw_index(node, node_vxlan_if)
            tmp_fn = '/tmp/configure_routes_and_bridge_domains.config'
            commands = list()
            for i in xrange(0, vxlan_count):
                dst_ip = dst_ip_addr_start + i * ip_step
                commands.append(
                    'ip_neighbor_add_del sw_if_index {sw_idx} dst {ip} '
                    'mac {mac}\n'.format(
                        sw_idx=sw_idx_vxlan,
                        ip=dst_ip,
                        mac=Topology.get_interface_mac(op_node, op_node_if)))
                commands.append(
                    'ip_route_add_del {ip}/{ip_len} count 1 via {ip} '
                    'sw_if_index {sw_idx}\n'.format(
                        ip=dst_ip,
                        ip_len=128 if dst_ip.version == 6 else 32,
                        sw_idx=sw_idx_vxlan))
                commands.append(
                    'sw_interface_set_l2_bridge sw_if_index {sw_idx} '
                    'bd_id {bd_id} shg 0 enable\n'.format(
                        sw_idx=Topology.get_interface_sw_index(
                            node, 'vxlan_tunnel{nr}'.format(nr=i + 1)),
                        bd_id=bd_id_start + i))
                commands.append(
                    'sw_interface_set_l2_bridge sw_if_index {sw_idx} '
                    'bd_id {bd_id} shg 0 enable\n'.format(
                        sw_idx=Topology.get_interface_sw_index(
                            node, 'vlan_subif{nr}'.format(nr=i + 1)),
                        bd_id=bd_id_start + i))
            VatExecutor().write_and_execute_script(node, tmp_fn, commands)
            return

        cmd1 = 'ip_neighbor_add_del'
        neighbor = dict(
            sw_if_index=Topology.get_interface_sw_index(node, node_vxlan_if),
            flags=0,
            mac_address=Topology.get_interface_mac(op_node, op_node_if),
            ip_address='')
        args1 = dict(
            is_add=1,
            neighbor=neighbor)
        cmd2 = 'ip_route_add_del'
        kwargs = dict(
            interface=node_vxlan_if,
            gateway=str(dst_ip_addr_start))
        route = IPUtil.compose_vpp_route_structure(
            node,
            str(dst_ip_addr_start),
            128 if dst_ip_addr_start.version == 6 else 32,
            **kwargs)
        args2 = dict(
            is_add=1,
            is_multipath=0,
            route=route)
        cmd3 = 'sw_interface_set_l2_bridge'
        args3 = dict(
            rx_sw_if_index=None,
            bd_id=None,
            shg=0,
            port_type=0,
            enable=1)
        args4 = dict(
            rx_sw_if_index=None,
            bd_id=None,
            shg=0,
            port_type=0,
            enable=1)
        err_msg = 'Failed to put VXLAN and VLAN interfaces to bridge domain ' \
                  'on host {host}'.format(host=node['host'])

        with PapiSocketExecutor(node) as papi_exec:
            for i in xrange(0, vxlan_count):
                dst_ip = dst_ip_addr_start + i * ip_step
                args1['neighbor']['ip_address'] = str(dst_ip)
                args2['route']['prefix']['address']['un'] = \
                    IPUtil.union_addr(dst_ip)
                args2['route']['paths'][0]['nh']['address'] = \
                    IPUtil.union_addr(dst_ip)
                args3['rx_sw_if_index'] = Topology.get_interface_sw_index(
                    node, 'vxlan_tunnel{nr}'.format(nr=i+1))
                args3['bd_id'] = int(bd_id_start+i)
                args4['rx_sw_if_index'] = Topology.get_interface_sw_index(
                    node, 'vlan_subif{nr}'.format(nr=i+1))
                args4['bd_id'] = int(bd_id_start+i)
                history = False if 1 < i < vxlan_count else True
                papi_exec.add(cmd1, history=history, **args1). \
                    add(cmd2, history=history, **args2). \
                    add(cmd3, history=history, **args3). \
                    add(cmd3, history=history, **args4)
            papi_exec.get_replies()