X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FSRv6.py;h=24ebea7ccf3307cbaa633fe513a15113ba6f04ed;hb=6cdc335b42c3fa4c4c69ec0b20314df02118e4b4;hp=a22bb5e8328045afac4ee3e1d420aa1be9e8b0aa;hpb=2291eaac7509aadf30be407a6eb84cfa3d3a33d0;p=csit.git diff --git a/resources/libraries/python/SRv6.py b/resources/libraries/python/SRv6.py index a22bb5e832..24ebea7ccf 100644 --- a/resources/libraries/python/SRv6.py +++ b/resources/libraries/python/SRv6.py @@ -1,4 +1,4 @@ -# Copyright (c) 2017 Cisco and/or its affiliates. +# 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: @@ -11,31 +11,45 @@ # See the License for the specific language governing permissions and # limitations under the License. -"""Segment Routing over IPv6 dataplane utilities library.""" +"""Segment Routing over IPv6 data plane utilities library.""" -from enum import Enum +from enum import IntEnum +from ipaddress import ip_address, IPv6Address -from resources.libraries.python.VatExecutor import VatTerminal -from resources.libraries.python.VatJsonUtil import VatJsonUtil -from resources.libraries.python.topology import Topology +from resources.libraries.python.Constants import Constants +from resources.libraries.python.InterfaceUtil import InterfaceUtil +from resources.libraries.python.PapiExecutor import PapiSocketExecutor -class SRv6Behaviour(Enum): - """Defines SRv6 endpoint functions implemented in VPP.""" +class SRv6Behavior(IntEnum): + """SRv6 LocalSID supported functions.""" # Endpoint function - END = 'end' + END = 1 # Endpoint function with Layer-3 cross-connect - END_X = 'end.x' + END_X = 2 # Endpoint with decapsulation and Layer-2 cross-connect - END_DX2 = 'end.dx2' - # Endpoint with decapsulation and IPv4 cross-connect - END_DX4 = 'end.dx4' - # Endpoint with decapsulation and IPv4 table lookup - END_DT4 = 'end.dt4' + END_DX2 = 5 # Endpoint with decapsulation and IPv6 cross-connect - END_DX6 = 'end.dx6' + END_DX6 = 6 + # Endpoint with decapsulation and IPv4 cross-connect + END_DX4 = 7 # Endpoint with decapsulation and IPv6 table lookup - END_DT6 = 'end.dt6' + END_DT6 = 8 + # Endpoint with decapsulation and IPv4 table lookup + END_DT4 = 9 + # Endpoint to SR-unaware appliance via static proxy + END_AS = 20 + # Endpoint to SR-unaware appliance via dynamic proxy + END_AD = 21 + # Endpoint to SR-unaware appliance via masquerading + END_AM = 22 + + +class SRv6PolicySteeringTypes(IntEnum): + """SRv6 LocalSID supported functions.""" + SR_STEER_L2 = 2 + SR_STEER_IPV4 = 4 + SR_STEER_IPV6 = 6 class SRv6(object): @@ -45,8 +59,35 @@ class SRv6(object): pass @staticmethod - def configure_sr_localsid(node, local_sid, behavior, interface=None, - next_hop=None, fib_table=None): + def create_srv6_sid_object(ip_addr): + """Create SRv6 SID object. + + :param ip_addr: IPv6 address. + :type ip_addr: str + :returns: SRv6 SID object. + :rtype: dict + """ + return dict(addr=IPv6Address(unicode(ip_addr)).packed) + + @staticmethod + def create_srv6_sid_list(sids): + """Create SRv6 SID list object. + + :param sids: SID IPv6 addresses. + :type sids: list + :returns: SRv6 SID list object. + :rtype: list + """ + sid_list = list(0 for _ in xrange(16)) + for i in xrange(len(sids)): + sid_list[i] = SRv6.create_srv6_sid_object(sids[i]) + return dict(num_sids=len(sids), weight=1, sids=sid_list) + + @staticmethod + def configure_sr_localsid( + node, local_sid, behavior, interface=None, next_hop=None, + fib_table=None, out_if=None, in_if=None, src_addr=None, + sid_list=None): """Create SRv6 LocalSID and binds it to a particular behaviour on the given node. @@ -59,65 +100,110 @@ class SRv6(object): xconnects). :param fib_table: FIB table for IPv4/IPv6 lookup (Optional, required for L3 routing). + :param out_if: Interface name of local interface for sending traffic + towards the Service Function (Optional, required for SRv6 endpoint + to SR-unaware appliance). + :param in_if: Interface name of local interface receiving the traffic + coming back from the Service Function (Optional, required for SRv6 + endpoint to SR-unaware appliance). + :param src_addr: Source address on the packets coming back on in_if + interface (Optional, required for SRv6 endpoint to SR-unaware + appliance via static proxy). + :param sid_list: SID list (Optional, required for SRv6 endpoint to + SR-unaware appliance via static proxy). :type node: dict :type local_sid: str :type behavior: str :type interface: str - :type next_hop: int + :type next_hop: str :type fib_table: str - :raises ValueError: If unsupported SRv6 LocalSID function used or - required parameter is missing. + :type out_if: str + :type in_if: str + :type src_addr: str + :type sid_list: list + :raises ValueError: If required parameter is missing. """ - if behavior == SRv6Behaviour.END: - params = '' - elif behavior in [SRv6Behaviour.END_X, SRv6Behaviour.END_DX4, - SRv6Behaviour.END_DX6]: + beh = behavior.replace('.', '_').upper() + # There is no SRv6Behaviour enum defined for functions from SRv6 plugins + # so we need to use CLI command to configure it. + if beh in (getattr(SRv6Behavior, 'END_AD').name, + getattr(SRv6Behavior, 'END_AS').name, + getattr(SRv6Behavior, 'END_AM').name): + if beh == getattr(SRv6Behavior, 'END_AS').name: + if next_hop is None or out_if is None or in_if is None or \ + src_addr is None or sid_list is None: + raise ValueError( + 'Required parameter(s) missing.\n' + 'next_hop:{nh}\n' + 'out_if:{oif}\n' + 'in_if:{iif}\n' + 'src_addr:{saddr}\n' + 'sid_list:{sids}'.format( + nh=next_hop, oif=out_if, iif=in_if, saddr=src_addr, + sids=sid_list)) + sid_conf = 'next ' + ' next '.join(sid_list) + params = 'nh {nh} oif {oif} iif {iif} src {saddr} {sids}'.\ + format(nh=next_hop, oif=out_if, iif=in_if, saddr=src_addr, + sids=sid_conf) + else: + if next_hop is None or out_if is None or in_if is None: + raise ValueError( + 'Required parameter(s) missing.\nnext_hop:{0}\n' + 'out_if:{1}\nin_if:{2}'.format(next_hop, out_if, in_if)) + params = 'nh {0} oif {1} iif {2}'.format( + next_hop, out_if, in_if) + + cli_cmd = 'sr localsid address {l_sid} behavior {beh} {params}'.\ + format(l_sid=local_sid, beh=behavior, params=params) + + PapiSocketExecutor.run_cli_cmd(node, cli_cmd) + return + + cmd = 'sr_localsid_add_del' + args = dict( + is_del=0, + localsid=SRv6.create_srv6_sid_object(local_sid), + end_psp=0, + behavior=getattr(SRv6Behavior, beh).value, + sw_if_index=Constants.BITWISE_NON_ZERO, + vlan_index=0, + fib_table=0, + nh_addr6=0, + nh_addr4=0 + ) + err_msg = 'Failed to add SR localSID {lsid} on host {host}'.format( + lsid=local_sid, host=node['host']) + + if beh in (getattr(SRv6Behavior, 'END_X').name, + getattr(SRv6Behavior, 'END_DX4').name, + getattr(SRv6Behavior, 'END_DX6').name): if interface is None or next_hop is None: - raise ValueError('Required data missing.\ninterface:{0}\n' - 'next_hop:{1}'.format(interface, next_hop)) - interface_name = Topology.get_interface_name(node, interface) - params = '{0} {1}'.format(interface_name, next_hop) - elif behavior == SRv6Behaviour.END_DX2: + raise ValueError('Required parameter(s) missing.\n' + 'interface:{ifc}\n' + 'next_hop:{nh}'. + format(ifc=interface, nh=next_hop)) + args['sw_if_index'] = InterfaceUtil.get_interface_index( + node, interface) + next_hop = ip_address(unicode(next_hop)) + if next_hop.version == 6: + args['nh_addr6'] = next_hop.packed + else: + args['nh_addr4'] = next_hop.packed + elif beh == getattr(SRv6Behavior, 'END_DX2').name: if interface is None: - raise ValueError('Required data missing.\ninterface:{0}\n'. - format(interface)) - params = '{0}'.format(interface) - elif behavior in [SRv6Behaviour.END_DT4, SRv6Behaviour.END_DT6]: + raise ValueError('Required parameter missing.\ninterface:{ifc}'. + format(ifc=interface)) + args['sw_if_index'] = InterfaceUtil.get_interface_index( + node, interface) + elif beh in (getattr(SRv6Behavior, 'END_DT4').name, + getattr(SRv6Behavior, 'END_DT6').name): if fib_table is None: - raise ValueError('Required data missing.\nfib_table:{0}\n'. - format(fib_table)) - params = '{0}'.format(fib_table) - else: - raise ValueError('Unsupported SRv6 LocalSID function: {0}'. - format(behavior)) - - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_localsid_add.vat', local_sid=local_sid, - behavior=behavior, params=params) - - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Create SRv6 LocalSID {0} failed on node {1}'.format( - local_sid, node['host'])) - - @staticmethod - def delete_sr_localsid(node, local_sid): - """Delete SRv6 LocalSID on the given node. - - :param node: Given node to delete localSID on. - :param local_sid: LocalSID IPv6 address. - :type node: dict - :type local_sid: str - """ - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_localsid_del.vat', local_sid=local_sid) + raise ValueError('Required parameter missing.\n' + 'fib_table: {fib}'.format(fib=fib_table)) + args['fib_table'] = fib_table - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Delete SRv6 LocalSID {0} failed on node {1}'.format( - local_sid, node['host'])) + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def show_sr_localsids(node): @@ -126,9 +212,12 @@ class SRv6(object): :param node: Given node to show localSIDs on. :type node: dict """ - with VatTerminal(node) as vat: - vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_localsids_show.vat') + cmd = 'sr_localsids_dump' + err_msg = 'Failed to get SR localSID dump on host {host}'.format( + host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd).get_details(err_msg) @staticmethod def configure_sr_policy(node, bsid, sid_list, mode='encap'): @@ -143,35 +232,18 @@ class SRv6(object): :type sid_list: list :type mode: str """ - sid_conf = 'next ' + ' next '.join(sid_list) - - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_policy_add.vat', bsid=bsid, - sid_conf=sid_conf, mode=mode) - - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Create SRv6 policy for BindingSID {0} failed on node ' - '{1}'.format(bsid, node['host'])) - - @staticmethod - def delete_sr_policy(node, bsid): - """Delete SRv6 policy on the given node. - - :param node: Given node to delete SRv6 policy on. - :param bsid: BindingSID IPv6 address. - :type node: dict - :type bsid: str - """ - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_policy_del.vat', bsid=bsid) - - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Delete SRv6 policy for BindingSID {0} failed on node ' - '{1}'.format(bsid, node['host'])) + cmd = 'sr_policy_add' + args = dict( + bsid_addr=IPv6Address(unicode(bsid)).packed, + weight=1, + is_encap=1 if mode == 'encap' else 0, + sids=SRv6.create_srv6_sid_list(sid_list) + ) + err_msg = 'Failed to add SR policy for BindingSID {bsid} ' \ + 'on host {host}'.format(bsid=bsid, host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def show_sr_policies(node): @@ -180,100 +252,110 @@ class SRv6(object): :param node: Given node to show SRv6 policies on. :type node: dict """ - with VatTerminal(node, json_param=False) as vat: - vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_policies_show.vat') + cmd = 'sr_policies_dump' + err_msg = 'Failed to get SR policies dump on host {host}'.format( + host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd).get_details(err_msg) @staticmethod - def configure_sr_steer(node, mode, bsid, interface=None, ip_addr=None, - mask=None): - """Create SRv6 steering policy on the given node. + def _get_sr_steer_policy_args( + node, mode, interface=None, ip_addr=None, prefix=None): + """Return values of sw_if_index, mask_width, prefix_addr and + traffic_type for sr_steering_add_del API. - :param node: Given node to create steering policy on. + :param node: Given node to create/delete steering policy on. :param mode: Mode of operation - L2 or L3. - :param bsid: BindingSID - local SID IPv6 address. :param interface: Interface name (Optional, required in case of L2 mode). :param ip_addr: IPv4/IPv6 address (Optional, required in case of L3 mode). - :param mask: IP address mask (Optional, required in case of L3 mode). + :param prefix: IP address prefix (Optional, required in case of L3 + mode). :type node: dict :type mode: str - :type bsid: str :type interface: str - :type ip_addr: int - :type mask: int + :type ip_addr: str + :type prefix: int + :returns: Values for sw_if_index, mask_width, prefix_addr and + traffic_type + :rtype: tuple :raises ValueError: If unsupported mode used or required parameter is missing. """ - if mode == 'l2': + if mode.lower() == 'l2': if interface is None: - raise ValueError('Required data missing.\ninterface:{0}\n'. - format(interface)) - interface_name = Topology.get_interface_name(node, interface) - params = 'l2 {0}'.format(interface_name) - elif mode == 'l3': - if ip_addr is None or mask is None: + raise ValueError('Required data missing.\ninterface:{ifc}'. + format(ifc=interface)) + sw_if_index = InterfaceUtil.get_interface_index(node, interface) + mask_width = 0 + prefix_addr = 16 * b'\x00' + traffic_type = getattr(SRv6PolicySteeringTypes, 'SR_STEER_L2').value + elif mode.lower() == 'l3': + if ip_addr is None or prefix is None: raise ValueError('Required data missing.\nIP address:{0}\n' - 'mask:{1}'.format(ip_addr, mask)) - params = '{0}/{1}'.format(ip_addr, mask) + 'mask:{1}'.format(ip_addr, prefix)) + sw_if_index = Constants.BITWISE_NON_ZERO + ip_addr = ip_address(unicode(ip_addr)) + prefix_addr = ip_addr.packed + mask_width = int(prefix) + if ip_addr.version == 4: + prefix_addr += 12 * b'\x00' + traffic_type = getattr( + SRv6PolicySteeringTypes, 'SR_STEER_IPV4').value + else: + traffic_type = getattr( + SRv6PolicySteeringTypes, 'SR_STEER_IPV6').value else: raise ValueError('Unsupported mode: {0}'.format(mode)) - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_steer_add_del.vat', params=params, bsid=bsid) - - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Create SRv6 steering policy for BindingSID {0} failed on ' - 'node {1}'.format(bsid, node['host'])) + return sw_if_index, mask_width, prefix_addr, traffic_type + # TODO: Bring L1 names, arguments and defaults closer to PAPI ones. @staticmethod - def delete_sr_steer(node, mode, bsid, interface=None, ip_addr=None, - mask=None): - """Delete SRv6 steering policy on the given node. + def configure_sr_steer( + node, mode, bsid, interface=None, ip_addr=None, prefix=None): + """Create SRv6 steering policy on the given node. - :param node: Given node to delete steering policy on. + :param node: Given node to create steering policy on. :param mode: Mode of operation - L2 or L3. :param bsid: BindingSID - local SID IPv6 address. :param interface: Interface name (Optional, required in case of L2 mode). :param ip_addr: IPv4/IPv6 address (Optional, required in case of L3 mode). - :param mask: IP address mask (Optional, required in case of L3 mode). + :param prefix: IP address prefix (Optional, required in case of L3 + mode). :type node: dict :type mode: str :type bsid: str :type interface: str - :type ip_addr: int - :type mask: int + :type ip_addr: str + :type prefix: int :raises ValueError: If unsupported mode used or required parameter is missing. """ - params = 'del' - if mode == 'l2': - if interface is None: - raise ValueError('Required data missing.\ninterface:{0}\n'. - format(interface)) - interface_name = Topology.get_interface_name(node, interface) - params += 'l2 {0}'.format(interface_name) - elif mode == 'l3': - if ip_addr is None or mask is None: - raise ValueError('Required data missing.\nIP address:{0}\n' - 'mask:{1}'.format(ip_addr, mask)) - params += '{0}/{1}'.format(ip_addr, mask) - else: - raise ValueError('Unsupported mode: {0}'.format(mode)) - - with VatTerminal(node) as vat: - resp = vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_steer_add_del.vat', params=params, bsid=bsid) - - VatJsonUtil.verify_vat_retval( - resp[0], - err_msg='Delete SRv6 policy for bsid {0} failed on node {1}'.format( - bsid, node['host'])) + sw_if_index, mask_width, prefix_addr, traffic_type = \ + SRv6._get_sr_steer_policy_args( + node, mode, interface, ip_addr, prefix) + + cmd = 'sr_steering_add_del' + args = dict( + is_del=0, + bsid_addr=IPv6Address(unicode(bsid)).packed, + sr_policy_index=0, + table_id=0, + prefix_addr=prefix_addr, + mask_width=mask_width, + sw_if_index=sw_if_index, + traffic_type=traffic_type + ) + err_msg = 'Failed to add SRv6 steering policy for BindingSID {bsid} ' \ + 'on host {host}'.format(bsid=bsid, host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def show_sr_steering_policies(node): @@ -282,6 +364,26 @@ class SRv6(object): :param node: Given node to show SRv6 steering policies on. :type node: dict """ - with VatTerminal(node, json_param=False) as vat: - vat.vat_terminal_exec_cmd_from_template( - 'srv6/sr_steer_policies_show.vat') + cmd = 'sr_steering_pol_dump' + err_msg = 'Failed to get SR localSID dump on host {host}'.format( + host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd).get_details(err_msg) + + @staticmethod + def set_sr_encaps_source_address(node, ip6_addr): + """Set SRv6 encapsulation source address on the given node. + + :param node: Given node to set SRv6 encapsulation source address on. + :param ip6_addr: Local SID IPv6 address. + :type node: dict + :type ip6_addr: str + """ + cmd = 'sr_set_encap_source' + args = dict(encaps_source=IPv6Address(unicode(ip6_addr)).packed) + err_msg = 'Failed to set SRv6 encapsulation source address {addr} ' \ + 'on host {host}'.format(addr=ip6_addr, host=node['host']) + + with PapiSocketExecutor(node) as papi_exec: + papi_exec.add(cmd, **args).get_reply(err_msg)