# copyright (c) 2021 Intel 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. """Flow Utilities Library.""" from ipaddress import ip_address from resources.libraries.python.topology import Topology from resources.libraries.python.ssh import exec_cmd_no_error from resources.libraries.python.PapiExecutor import PapiSocketExecutor from vpp_papi import VppEnum class FlowUtil: """Utilities for flow configuration.""" @staticmethod def vpp_create_ip4_n_tuple_flow( node, src_ip, dst_ip, src_port, dst_port, proto, action, value=0): """Create IP4_N_TUPLE flow. :param node: DUT node. :param src_ip: Source IP4 address. :param dst_ip: Destination IP4 address. :param src_port: Source port. :param dst_port: Destination port. :param proto: TCP or UDP. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type src_port: int :type dst_port: int :type proto: str :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip4_n_tuple" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_N_TUPLE if proto == u"TCP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_TCP elif proto == u"UDP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP else: raise ValueError(f"proto error: {proto}") pattern = { u'src_addr': {u'addr': src_ip, u'mask': u"255.255.255.255"}, u'dst_addr': {u'addr': dst_ip, u'mask': u"255.255.255.255"}, u'src_port': {u'port': src_port, u'mask': 0xFFFF}, u'dst_port': {u'port': dst_port, u'mask': 0xFFFF}, u'protocol': {u'prot': flow_proto} } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip6_n_tuple_flow( node, src_ip, dst_ip, src_port, dst_port, proto, action, value=0): """Create IP6_N_TUPLE flow. :param node: DUT node. :param src_ip: Source IP6 address. :param dst_ip: Destination IP6 address. :param src_port: Source port. :param dst_port: Destination port. :param proto: TCP or UDP. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type src_port: int :type dst_port: int :type proto: str :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip6_n_tuple" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP6_N_TUPLE if proto == u"TCP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_TCP elif proto == u"UDP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP else: raise ValueError(f"proto error: {proto}") pattern = { u'src_addr': {u'addr': src_ip, \ u'mask': u"FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF"}, u'dst_addr': {u'addr': dst_ip, \ u'mask': u"FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF"}, u'src_port': {u'port': src_port, u'mask': 0xFFFF}, u'dst_port': {u'port': dst_port, u'mask': 0xFFFF}, u'protocol': {u'prot': flow_proto} } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip4_flow( node, src_ip, dst_ip, proto, action, value=0): """Create IP4 flow. :param node: DUT node. :param src_ip: Source IP4 address. :param dst_ip: Destination IP4 address. :param proto: TCP or UDP. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type proto: str :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip4" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4 if proto == u"TCP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_TCP elif proto == u"UDP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP else: raise ValueError(f"proto error: {proto}") pattern = { u'src_addr': {u'addr': src_ip, u'mask': u"255.255.255.255"}, u'dst_addr': {u'addr': dst_ip, u'mask': u"255.255.255.255"}, u'protocol': {u'prot': flow_proto} } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip6_flow( node, src_ip, dst_ip, proto, action, value=0): """Create IP6 flow. :param node: DUT node. :param src_ip: Source IP6 address. :param dst_ip: Destination IP6 address. :param proto: TCP or UDP. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type proto: str :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip6" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP6 if proto == u"TCP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_TCP elif proto == u"UDP": flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP else: raise ValueError(f"proto error: {proto}") pattern = { u'src_addr': {u'addr': src_ip, \ u'mask': u"FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF"}, u'dst_addr': {'addr': dst_ip, \ u'mask': u"FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF"}, u'protocol': {u'prot': flow_proto} } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip4_gtpu_flow( node, src_ip, dst_ip, teid, action, value=0): """Create IP4_GTPU flow. :param node: DUT node. :param src_ip: Source IP4 address. :param dst_ip: Destination IP4 address. :param teid: Tunnel endpoint identifier. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type teid: int :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip4_gtpu" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_GTPU flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP pattern = { u'src_addr': {u'addr': src_ip, u'mask': u"255.255.255.255"}, u'dst_addr': {u'addr': dst_ip, u'mask': u"255.255.255.255"}, u'protocol': {u'prot': flow_proto}, u'teid': teid } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip4_ipsec_flow(node, proto, spi, action, value=0): """Create IP4_IPSEC flow. :param node: DUT node. :param proto: TCP or UDP. :param spi: Security Parameters Index. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type proto: str :type spi: int :type action: str :type value: int :returns: flow_index. :rtype: int """ if proto == u"ESP": flow = u"ip4_ipsec_esp" flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_ESP flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_IPSEC_ESP elif proto == u"AH": flow = u"ip4_ipsec_ah" flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_AH flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_IPSEC_AH else: raise ValueError(f"proto error: {proto}") pattern = { u'protocol': {u'prot': flow_proto}, u'spi': spi } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip4_l2tp_flow(node, session_id, action, value=0): """Create IP4_L2TPV3OIP flow. :param node: DUT node. :param session_id: PPPoE session ID :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type session_id: int :type action: str :type value: int :returns: flow_index. :rtype: int """ flow = u"ip4_l2tpv3oip" flow_proto = 115 # IP_API_PROTO_L2TP flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_L2TPV3OIP pattern = { u'protocol': {u'prot': flow_proto}, u'session_id': session_id } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_create_ip4_vxlan_flow(node, src_ip, dst_ip, vni, action, value=0): """Create IP4_VXLAN flow. :param node: DUT node. :param src_ip: Source IP4 address. :param dst_ip: Destination IP4 address. :param vni: Virtual network instance. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type src_ip: str :type dst_ip: str :type vni: int :type action: str :type value: int :returns: flow_index. """ flow = u"ip4_vxlan" flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_VXLAN flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP pattern = { u'src_addr': {u'addr': src_ip, u'mask': u"255.255.255.255"}, u'dst_addr': {u'addr': dst_ip, u'mask': u"255.255.255.255"}, u'dst_port': {u'port': 4789, 'mask': 0xFFFF}, u'protocol': {u'prot': flow_proto}, u'vni': vni } flow_index = FlowUtil.vpp_flow_add( node, flow, flow_type, pattern, action, value) return flow_index @staticmethod def vpp_flow_add(node, flow, flow_type, pattern, action, value=0): """Flow add. :param node: DUT node. :param flow: Name of flow. :param flow_type: Type of flow. :param pattern: Pattern of flow. :param action: Mark, drop or redirect-to-queue. :param value: Action value. :type node: dict :type node: str :type flow_type: str :type pattern: dict :type action: str :type value: int :returns: flow_index. :rtype: int :raises ValueError: If action type is not supported. """ cmd = u"flow_add" if action == u"redirect-to-queue": flow_rule = { u'type': flow_type, u'actions': VppEnum.vl_api_flow_action_t.\ FLOW_ACTION_REDIRECT_TO_QUEUE, u'redirect_queue': value, u'flow': {flow : pattern} } elif action == u"mark": flow_rule = { u'type': flow_type, u'actions': VppEnum.vl_api_flow_action_t.FLOW_ACTION_MARK, u'mark_flow_id': value, u'flow': {flow : pattern} } elif action == u"drop": flow_rule = { u'type': flow_type, u'actions': VppEnum.vl_api_flow_action_t.FLOW_ACTION_DROP, u'flow': {flow : pattern} } else: raise ValueError(f"Unsupported action type: {action}") err_msg = f"Failed to create {flow} flow on host {node[u'host']}." args = dict(flow=flow_rule) flow_index = -1 with PapiSocketExecutor(node) as papi_exec: reply = papi_exec.add(cmd, **args).get_reply(err_msg) flow_index = reply[u"flow_index"] return flow_index @staticmethod def vpp_flow_enable(node, interface, flow_index=0): """Flow enable. :param node: DUT node. :param interface: Interface sw_if_index. :param flow_index: Flow index. :type node: dict :type interface: int :type flow_index: int :returns: Nothing. """ cmd = u"flow_enable" sw_if_index = Topology.get_interface_sw_index(node, interface) args = dict( flow_index=int(flow_index), hw_if_index=int(sw_if_index) ) err_msg = u"Failed to enable flow on host {node[u'host']}" with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_flow_disable(node, interface, flow_index=0): """Flow disable. :param node: DUT node. :param interface: Interface sw_if_index. :param flow_index: Flow index. :type node: dict :type interface: int :type flow_index: int :returns: Nothing. """ cmd = u"flow_disable" sw_if_index = Topology.get_interface_sw_index(node, interface) args = dict( flow_index=int(flow_index), hw_if_index=int(sw_if_index) ) err_msg = u"Failed to disable flow on host {node[u'host']}" with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_flow_del(node, flow_index=0): """Flow delete. :param node: DUT node. :param flow_index: Flow index. :type node: dict :type flow_index: int :returns: Nothing. """ cmd = u"flow_del" args = dict( flow_index=int(flow_index) ) err_msg = u"Failed to delete flow on host {node[u'host']}" with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_show_flow_entry(node): """Show flow entry. :param node: DUT node. :type node: dict :returns: flow entry. :rtype: str """ cmd = u"vppctl show flow entry" err_msg = u"Failed to show flow on host {node[u'host']}" stdout, _ = exec_cmd_no_error( node, cmd, sudo=False, message=err_msg, retries=120 ) return stdout.strip() @staticmethod def vpp_verify_flow_action( node, action, value, src_mac=u"11:22:33:44:55:66", dst_mac=u"11:22:33:44:55:66", src_ip=None, dst_ip=None): """Verify the correctness of the flow action. :param node: DUT node. :param action: Action. :param value: Action value. :param src_mac: Source mac address. :param dst_mac: Destination mac address. :param src_ip: Source IP address. :param dst_ip: Destination IP address. :type node: dict :type action: str :type value: int :type src_mac: str :type dst_mac: str :type src_ip: str :type dst_ip: str :returns: Nothing. :raises RuntimeError: If the verification of flow action fails. :raises ValueError: If action type is not supported. """ err_msg = f"Failed to show trace on host {node[u'host']}" cmd = u"vppctl show trace" stdout, _ = exec_cmd_no_error( node, cmd, sudo=False, message=err_msg, retries=120 ) err_info = f"Verify flow {action} failed" if src_ip is None: expected_str = f"{src_mac} -> {dst_mac}" else: src_ip = ip_address(src_ip) dst_ip = ip_address(dst_ip) expected_str = f"{src_ip} -> {dst_ip}" if action == u"drop": if expected_str in stdout: raise RuntimeError(err_info) elif action == u"redirect-to-queue": if f"queue {value}" not in stdout \ and f"qid {value}" not in stdout: raise RuntimeError(err_info) if expected_str not in stdout: raise RuntimeError(err_info) elif action == u"mark": if u"PKT_RX_FDIR" not in stdout and u"flow-id 1" not in stdout: raise RuntimeError(err_info) if expected_str not in stdout: raise RuntimeError(err_info) else: raise ValueError(f"Unsupported action type: {action}")