| from distutils.util import strtobool |
| from tests.USECASE.SegmentRouting.dependencies import scapy_helper |
| |
| |
| class Trex: |
| """ |
| Utility that manages interaction with TRex server via TRexDriver component |
| Example params: |
| <TREX> |
| <port_stats>0,1</port_stats> |
| <flows> |
| <RT_FROM_UE> |
| <name>Real Time</name> |
| <l1_bps>40000000</l1_bps> |
| <trex_port>0</trex_port> |
| <packet> |
| <pktlen>1400</pktlen> |
| <ip_src>10.240.0.2</ip_src> |
| <ip_dst>10.32.11.101</ip_dst> |
| <eth_src>3C:EC:EF:3E:0B:A0</eth_src> |
| <eth_dst>00:00:0A:4C:1C:46</eth_dst> |
| <gtp_teid>200</gtp_teid> |
| <s1u_addr>10.32.11.126</s1u_addr> |
| <enb_addr>10.32.11.100</enb_addr> |
| </packet> |
| <latency_stats>true</latency_stats> |
| <flow_id>10</flow_id> <!-- Mandatory when latency_stats=true --> |
| <delay>50000</delay> <!-- wait 50 ms till start to let queues fill up --> |
| <expected_min_received>1</expected_min_received> |
| <expected_max_dropped>0</expected_max_dropped> |
| <expected_max_latency>1500</expected_max_latency> |
| <expected_99_9_percentile_latency>100</expected_99_9_percentile_latency> |
| </RT_FROM_UE> |
| </flows> |
| <TREX> |
| """ |
| |
| def __init__(self): |
| self.trex_client = None |
| self.traffic_flows = {} |
| self.port_stats = [] |
| self.packets = {} # Per-flow dictionary of packets |
| |
| def setup(self, trex_client): |
| self.trex_client = trex_client |
| self.traffic_flows = main.params["TREX"]["flows"] |
| if "port_stats" in main.params["TREX"] and \ |
| main.params["TREX"].get("port_stats") is not '': |
| self.port_stats = [int(p) for p in |
| main.params["TREX"].get("port_stats").split(",")] |
| self.trex_client.setupTrex(main.configPath) |
| |
| def teardown(self): |
| self.trex_client.stopTrexServer() |
| |
| def createFlow(self, flow_name): |
| if flow_name not in self.traffic_flows: |
| main.log.error("CFG flow not present in params") |
| return False |
| self.traffic_flows[flow_name]["packet"] = Trex.__sanitizePacketConfig( |
| self.traffic_flows[flow_name]["packet"]) |
| if "gtp_teid" in self.traffic_flows[flow_name]["packet"]: |
| # packets must be GTP encapped |
| self.packets[flow_name] = scapy_helper.simple_gtp_udp_packet( |
| **self.traffic_flows[flow_name]["packet"]) |
| else: |
| self.packets[flow_name] = scapy_helper.simple_udp_packet( |
| **self.traffic_flows[flow_name]["packet"]) |
| |
| def sendAndReceiveTraffic(self, duration): |
| """ |
| Connect the client, create the flows in trex (with packets created with |
| createFlow, send and receive the traffic, and disconnect the client. |
| :param duration: traffic duration |
| :return: |
| """ |
| self.trex_client.connectTrexClient() |
| for flow_name, packet in self.packets.items(): |
| flow_config = self.traffic_flows[flow_name] |
| Trex.__sanitizeFlowConfig(flow_config) |
| self.trex_client.addStream(pkt=packet, |
| trex_port=flow_config["trex_port"], |
| l1_bps=flow_config["l1_bps"], |
| percentage=flow_config["percentage"], |
| delay=flow_config["delay"], |
| flow_id=flow_config["flow_id"], |
| flow_stats=flow_config["latency_stats"]) |
| self.trex_client.startAndWaitTraffic(duration=duration) |
| self.trex_client.disconnectTrexClient() |
| |
| def assertRxPackets(self, flow_name): |
| if not self.isFlowStats(flow_name): |
| main.log.info("No flow stats for flow {}".format(flow_name)) |
| expected_min_received = int( |
| self.traffic_flows[flow_name].get("expected_min_received", "1")) |
| flow_id = self.traffic_flows[flow_name]["flow_id"] |
| flow_stats = self.trex_client.getFlowStats(flow_id) |
| utilities.assert_equals( |
| expect=True, |
| actual=flow_stats.rx_packets >= expected_min_received, |
| onpass="Traffic Flow {}: Received traffic".format(flow_name), |
| onfail="Traffic Flow {}: No traffic received".format(flow_name)) |
| |
| def assertDroppedPacket(self, flow_name): |
| if not self.isFlowStats(flow_name): |
| main.log.info("No flow stats for flow {}".format(flow_name)) |
| expected_max_dropped = int( |
| self.traffic_flows[flow_name].get("expected_max_dropped", "0")) |
| latency_stats = self.__getLatencyStats(flow_name) |
| utilities.assert_equals( |
| expect=True, |
| actual=latency_stats.dropped <= expected_max_dropped, |
| onpass="Traffic Flow {}: {} packets dropped, below threshold ({})".format( |
| flow_name, latency_stats.dropped, |
| expected_max_dropped), |
| onfail="Traffic Flow {}: {} packets dropped, above threshold ({})".format( |
| flow_name, latency_stats.dropped, |
| expected_max_dropped)) |
| |
| def assertMaxLatency(self, flow_name): |
| if not self.isFlowStats(flow_name): |
| main.log.info("No flow stats for flow {}".format(flow_name)) |
| expected_max_latency = int( |
| self.traffic_flows[flow_name].get("expected_max_latency", "0")) |
| latency_stats = self.__getLatencyStats(flow_name) |
| utilities.assert_equals( |
| expect=True, |
| actual=latency_stats.total_max <= expected_max_latency, |
| onpass="Traffic Flow {}: Maximum latency below threshold".format( |
| flow_name), |
| onfail="Traffic Flow {}: Maximum latency is too high {}".format( |
| flow_name, latency_stats.total_max)) |
| |
| def assert99_9PercentileLatency(self, flow_name): |
| if not self.isFlowStats(flow_name): |
| main.log.info("No flow stats for flow {}".format(flow_name)) |
| expected_99_9_percentile_latency = int( |
| self.traffic_flows[flow_name].get( |
| "expected_99_9_percentile_latency", "0")) |
| latency_stats = self.__getLatencyStats(flow_name) |
| utilities.assert_equals( |
| expect=True, |
| actual=latency_stats.percentile_99_9 <= expected_99_9_percentile_latency, |
| onpass="Traffic Flow {}: 99.9th percentile latency below threshold".format( |
| flow_name), |
| onfail="Traffic Flow {}: 99.9th percentile latency is too high {}".format( |
| flow_name, latency_stats.percentile_99_9)) |
| |
| def logPortStats(self): |
| main.log.debug(self.port_stats) |
| for port in self.port_stats: |
| self.trex_client.logPortStats(port) |
| |
| def logFlowStats(self, flow_name): |
| if self.isFlowStats(flow_name): |
| flow_id = self.traffic_flows[flow_name]["flow_id"] |
| self.trex_client.logFlowStats(flow_id) |
| self.trex_client.logLatencyStats(flow_id) |
| |
| def isFlowStats(self, flow_name): |
| return self.traffic_flows[flow_name]["latency_stats"] |
| |
| def __getLatencyStats(self, flow_name): |
| flow_id = self.traffic_flows[flow_name]["flow_id"] |
| return self.trex_client.getLatencyStats(flow_id) |
| |
| @staticmethod |
| def __sanitizePacketConfig(packet): |
| if "gtp_teid" in packet.keys(): |
| packet["gtp_teid"] = int(packet["gtp_teid"]) |
| if "pktlen" in packet.keys(): |
| packet["pktlen"] = int(packet["pktlen"]) |
| return packet |
| |
| @staticmethod |
| def __sanitizeFlowConfig(flow_config): |
| flow_config["trex_port"] = int(flow_config["trex_port"]) |
| flow_config["percentage"] = float( |
| flow_config["percentage"]) if "percentage" in flow_config else None |
| flow_config["l1_bps"] = float( |
| flow_config["l1_bps"]) if "l1_bps" in flow_config else None |
| flow_config["delay"] = int(flow_config.get("delay", 0)) |
| flow_config["flow_id"] = int( |
| flow_config["flow_id"]) if "flow_id" in flow_config else None |
| flow_config["latency_stats"] = bool( |
| strtobool(flow_config.get("latency_stats", "False"))) |