| """ |
| Flow stats test case. |
| Similar to Flow stats test case in the perl test harness. |
| |
| """ |
| |
| import logging |
| |
| import unittest |
| import random |
| import copy |
| |
| from oftest import config |
| import oftest.controller as controller |
| import oftest.cstruct as ofp |
| import oftest.message as message |
| import oftest.dataplane as dataplane |
| import oftest.action as action |
| import oftest.parse as parse |
| import oftest.base_tests as base_tests |
| |
| from oftest.testutils import * |
| from time import sleep |
| |
| # TODO: ovs has problems with VLAN id? |
| WILDCARD_VALUES = [ofp.OFPFW_IN_PORT, |
| # (ofp.OFPFW_DL_VLAN | ofp.OFPFW_DL_VLAN_PCP), |
| ofp.OFPFW_DL_SRC, |
| ofp.OFPFW_DL_DST, |
| (ofp.OFPFW_DL_TYPE | ofp.OFPFW_NW_SRC_ALL | |
| ofp.OFPFW_NW_DST_ALL | ofp.OFPFW_NW_TOS | ofp.OFPFW_NW_PROTO | |
| ofp.OFPFW_TP_SRC | ofp.OFPFW_TP_DST), |
| (ofp.OFPFW_NW_PROTO | ofp.OFPFW_TP_SRC | ofp.OFPFW_TP_DST), |
| ofp.OFPFW_TP_SRC, |
| ofp.OFPFW_TP_DST, |
| ofp.OFPFW_NW_SRC_MASK, |
| ofp.OFPFW_NW_DST_MASK, |
| ofp.OFPFW_DL_VLAN_PCP, |
| ofp.OFPFW_NW_TOS] |
| |
| def sendPacket(obj, pkt, ingress_port, egress_port, test_timeout): |
| |
| logging.info("Sending packet to dp port " + str(ingress_port) + |
| ", expecting output on " + str(egress_port)) |
| obj.dataplane.send(ingress_port, str(pkt)) |
| |
| exp_pkt_arg = None |
| exp_port = None |
| if config["relax"]: |
| exp_pkt_arg = pkt |
| exp_port = egress_port |
| |
| (rcv_port, rcv_pkt, pkt_time) = obj.dataplane.poll(port_number=exp_port, |
| exp_pkt=exp_pkt_arg) |
| obj.assertTrue(rcv_pkt is not None, |
| "Packet not received on port " + str(egress_port)) |
| logging.debug("Packet len " + str(len(rcv_pkt)) + " in on " + |
| str(rcv_port)) |
| obj.assertEqual(rcv_port, egress_port, |
| "Packet received on port " + str(rcv_port) + |
| ", expected port " + str(egress_port)) |
| obj.assertEqual(str(pkt), str(rcv_pkt), |
| 'Response packet does not match send packet') |
| |
| class SingleFlowStats(base_tests.SimpleDataPlane): |
| """ |
| Verify flow stats are properly retrieved. |
| |
| Generate a packet |
| Generate and install a matching flow |
| Send the packet |
| Send a flow stats request to match the flow and retrieve stats |
| Verify that the packet counter has incremented |
| """ |
| |
| def verifyStats(self, flow_mod_msg, match, out_port, test_timeout, packet_count): |
| stat_req = message.flow_stats_request() |
| stat_req.match = match |
| stat_req.table_id = 0xff |
| stat_req.out_port = out_port |
| |
| all_packets_received = 0 |
| for i in range(0,test_timeout): |
| logging.info("Sending stats request") |
| response, pkt = self.controller.transact(stat_req, |
| timeout=test_timeout) |
| self.assertTrue(response is not None, |
| "No response to stats request") |
| self.assertTrue(len(response.stats) == 1, |
| "Did not receive flow stats reply") |
| for obj in response.stats: |
| # TODO: pad1 and pad2 fields may be nonzero, is this a bug? |
| # for now, just clear them so the assert is simpler |
| obj.match.pad1 = 0 |
| obj.match.pad2 = [0, 0] |
| self.assertEqual(flow_mod_msg.match, obj.match, |
| "Matches do not match") |
| self.assertEqual(obj.cookie, flow_mod_msg.cookie) |
| self.assertEqual(obj.priority, flow_mod_msg.priority) |
| self.assertEqual(obj.idle_timeout, flow_mod_msg.idle_timeout) |
| self.assertEqual(obj.hard_timeout, flow_mod_msg.hard_timeout) |
| self.assertEqual(obj.actions, flow_mod_msg.actions) |
| logging.info("Received " + str(obj.packet_count) + " packets") |
| if obj.packet_count == packet_count: |
| all_packets_received = 1 |
| |
| if all_packets_received: |
| break |
| sleep(1) |
| |
| self.assertTrue(all_packets_received, |
| "Packet count does not match number sent") |
| |
| def runTest(self): |
| # TODO: set from command-line parameter |
| test_timeout = 60 |
| |
| of_ports = config["port_map"].keys() |
| of_ports.sort() |
| self.assertTrue(len(of_ports) > 1, "Not enough ports for test") |
| |
| rc = delete_all_flows(self.controller) |
| self.assertEqual(rc, 0, "Failed to delete all flows") |
| |
| # build packet |
| pkt = simple_tcp_packet() |
| match = packet_to_flow_match(self, pkt) |
| match.wildcards &= ~ofp.OFPFW_IN_PORT |
| self.assertTrue(match is not None, |
| "Could not generate flow match from pkt") |
| act = action.action_output() |
| |
| # build flow |
| ingress_port = of_ports[0]; |
| egress_port = of_ports[1]; |
| logging.info("Ingress " + str(ingress_port) + |
| " to egress " + str(egress_port)) |
| match.in_port = ingress_port |
| flow_mod_msg = message.flow_mod() |
| flow_mod_msg.match = copy.deepcopy(match) |
| flow_mod_msg.cookie = random.randint(0,9007199254740992) |
| flow_mod_msg.buffer_id = 0xffffffff |
| flow_mod_msg.idle_timeout = 60000 |
| flow_mod_msg.hard_timeout = 65000 |
| flow_mod_msg.priority = 100 |
| act.port = egress_port |
| self.assertTrue(flow_mod_msg.actions.add(act), "Could not add action") |
| |
| # send flow |
| logging.info("Inserting flow") |
| rv = self.controller.message_send(flow_mod_msg) |
| self.assertTrue(rv != -1, "Error installing flow mod") |
| self.assertEqual(do_barrier(self.controller), 0, "Barrier failed") |
| |
| # no packets sent, so zero packet count |
| self.verifyStats(flow_mod_msg, match, ofp.OFPP_NONE, test_timeout, 0) |
| |
| # send packet N times |
| num_sends = random.randint(10,20) |
| logging.info("Sending " + str(num_sends) + " test packets") |
| for i in range(0,num_sends): |
| sendPacket(self, pkt, ingress_port, egress_port, |
| test_timeout) |
| |
| self.verifyStats(flow_mod_msg, match, ofp.OFPP_NONE, test_timeout, num_sends) |
| self.verifyStats(flow_mod_msg, match, egress_port, test_timeout, num_sends) |
| for wc in WILDCARD_VALUES: |
| match.wildcards = required_wildcards(self) | wc |
| self.verifyStats(flow_mod_msg, match, egress_port, test_timeout, num_sends) |
| |
| |
| class TwoFlowStats(base_tests.SimpleDataPlane): |
| """ |
| Verify flow stats are properly retrieved. |
| |
| Generate two packets and install two matching flows |
| Send some number of packets |
| Send a flow stats request to match the flows and retrieve stats |
| Verify that the packet counter has incremented |
| |
| TODO: add a third flow, and then configure the match to exclude |
| that flow? |
| """ |
| |
| def buildFlowModMsg(self, pkt, ingress_port, egress_port): |
| match = packet_to_flow_match(self, pkt) |
| match.wildcards &= ~ofp.OFPFW_IN_PORT |
| self.assertTrue(match is not None, |
| "Could not generate flow match from pkt") |
| match.in_port = ingress_port |
| |
| flow_mod_msg = message.flow_mod() |
| flow_mod_msg.match = match |
| flow_mod_msg.cookie = random.randint(0,9007199254740992) |
| flow_mod_msg.buffer_id = 0xffffffff |
| flow_mod_msg.idle_timeout = 0 |
| flow_mod_msg.hard_timeout = 0 |
| act = action.action_output() |
| act.port = egress_port |
| self.assertTrue(flow_mod_msg.actions.add(act), "Could not add action") |
| |
| logging.info("Ingress " + str(ingress_port) + |
| " to egress " + str(egress_port)) |
| |
| return flow_mod_msg |
| |
| def sumStatsReplyCounts(self, response): |
| total_packets = 0 |
| for obj in response.stats: |
| # TODO: pad1 and pad2 fields may be nonzero, is this a bug? |
| # for now, just clear them so the assert is simpler |
| #obj.match.pad1 = 0 |
| #obj.match.pad2 = [0, 0] |
| #self.assertEqual(match, obj.match, |
| # "Matches do not match") |
| logging.info("Received " + str(obj.packet_count) |
| + " packets") |
| total_packets += obj.packet_count |
| return total_packets |
| |
| def verifyStats(self, match, out_port, test_timeout, packet_count): |
| stat_req = message.flow_stats_request() |
| stat_req.match = match |
| stat_req.table_id = 0xff |
| stat_req.out_port = out_port |
| |
| all_packets_received = 0 |
| for i in range(0,test_timeout): |
| logging.info("Sending stats request") |
| # TODO: move REPLY_MORE handling to controller.transact? |
| response, pkt = self.controller.transact(stat_req, |
| timeout=test_timeout) |
| self.assertTrue(response is not None, |
| "No response to stats request") |
| total_packets = self.sumStatsReplyCounts(response) |
| |
| while response.flags == ofp.OFPSF_REPLY_MORE: |
| response, pkt = self.controller.poll(exp_msg= |
| ofp.OFPT_STATS_REPLY, |
| timeout=test_timeout) |
| total_packets += self.sumStatsReplyCounts(response) |
| |
| if total_packets == packet_count: |
| all_packets_received = 1 |
| break |
| sleep(1) |
| |
| self.assertTrue(all_packets_received, |
| "Total stats packet count " + str(total_packets) + |
| " does not match number sent " + str(packet_count)) |
| |
| def runTest(self): |
| # TODO: set from command-line parameter |
| test_timeout = 60 |
| |
| of_ports = config["port_map"].keys() |
| of_ports.sort() |
| self.assertTrue(len(of_ports) >= 3, "Not enough ports for test") |
| ingress_port = of_ports[0]; |
| egress_port1 = of_ports[1]; |
| egress_port2 = of_ports[2]; |
| |
| rc = delete_all_flows(self.controller) |
| self.assertEqual(rc, 0, "Failed to delete all flows") |
| |
| pkt1 = simple_tcp_packet() |
| flow_mod_msg1 = self.buildFlowModMsg(pkt1, ingress_port, egress_port1) |
| |
| pkt2 = simple_tcp_packet(dl_src='0:7:7:7:7:7') |
| flow_mod_msg2 = self.buildFlowModMsg(pkt2, ingress_port, egress_port2) |
| |
| logging.info("Inserting flow1") |
| rv = self.controller.message_send(flow_mod_msg1) |
| self.assertTrue(rv != -1, "Error installing flow mod") |
| logging.info("Inserting flow2") |
| rv = self.controller.message_send(flow_mod_msg2) |
| self.assertTrue(rv != -1, "Error installing flow mod") |
| self.assertEqual(do_barrier(self.controller), 0, "Barrier failed") |
| |
| num_pkt1s = random.randint(10,30) |
| logging.info("Sending " + str(num_pkt1s) + " pkt1s") |
| num_pkt2s = random.randint(10,30) |
| logging.info("Sending " + str(num_pkt2s) + " pkt2s") |
| for i in range(0,num_pkt1s): |
| sendPacket(self, pkt1, ingress_port, egress_port1, test_timeout) |
| for i in range(0,num_pkt2s): |
| sendPacket(self, pkt2, ingress_port, egress_port2, test_timeout) |
| |
| match1 = packet_to_flow_match(self, pkt1) |
| logging.info("Verifying flow1's " + str(num_pkt1s) + " packets") |
| self.verifyStats(match1, ofp.OFPP_NONE, test_timeout, num_pkt1s) |
| match2 = packet_to_flow_match(self, pkt2) |
| logging.info("Verifying flow2's " + str(num_pkt2s) + " packets") |
| self.verifyStats(match2, ofp.OFPP_NONE, test_timeout, num_pkt2s) |
| match1.wildcards |= ofp.OFPFW_DL_SRC |
| logging.info("Verifying combined " + str(num_pkt1s+num_pkt2s) + " packets") |
| self.verifyStats(match1, ofp.OFPP_NONE, test_timeout, |
| num_pkt1s+num_pkt2s) |
| # TODO: sweep through the wildcards to verify matching? |
| |
| |
| class AggregateStats(base_tests.SimpleDataPlane): |
| """ |
| Verify aggregate flow stats are properly retrieved. |
| |
| Generate two packets |
| Generate and install two matching flows |
| Send an aggregate stats request |
| Verify that aggregate stats are correct |
| Also verify out_port filtering |
| """ |
| |
| def buildFlowModMsg(self, pkt, ingress_port, egress_port): |
| match = packet_to_flow_match(self, pkt) |
| match.wildcards &= ~ofp.OFPFW_IN_PORT |
| self.assertTrue(match is not None, |
| "Could not generate flow match from pkt") |
| match.in_port = ingress_port |
| |
| flow_mod_msg = message.flow_mod() |
| flow_mod_msg.match = match |
| flow_mod_msg.cookie = random.randint(0,9007199254740992) |
| flow_mod_msg.buffer_id = 0xffffffff |
| flow_mod_msg.idle_timeout = 0 |
| flow_mod_msg.hard_timeout = 0 |
| act = action.action_output() |
| act.port = egress_port |
| self.assertTrue(flow_mod_msg.actions.add(act), "Could not add action") |
| |
| logging.info("Ingress " + str(ingress_port) + |
| " to egress " + str(egress_port)) |
| |
| return flow_mod_msg |
| |
| def verifyAggFlowStats(self, match, out_port, test_timeout, |
| flow_count, packet_count): |
| stat_req = message.aggregate_stats_request() |
| stat_req.match = match |
| stat_req.table_id = 0xff |
| stat_req.out_port = out_port |
| |
| all_packets_received = 0 |
| for i in range(0,test_timeout): |
| logging.info("Sending stats request") |
| response, pkt = self.controller.transact(stat_req, |
| timeout=test_timeout) |
| self.assertTrue(response is not None, |
| "No response to stats request") |
| self.assertTrue(len(response.stats) == 1, |
| "Did not receive flow stats reply") |
| for obj in response.stats: |
| self.assertTrue(obj.flow_count == flow_count, |
| "Flow count " + str(obj.flow_count) + |
| " does not match expected " + str(flow_count)) |
| logging.info("Received " + str(obj.packet_count) + " packets") |
| if obj.packet_count == packet_count: |
| all_packets_received = 1 |
| |
| if all_packets_received: |
| break |
| sleep(1) |
| |
| self.assertTrue(all_packets_received, |
| "Packet count does not match number sent") |
| |
| def runTest(self): |
| # TODO: set from command-line parameter |
| test_timeout = 60 |
| |
| of_ports = config["port_map"].keys() |
| of_ports.sort() |
| self.assertTrue(len(of_ports) >= 3, "Not enough ports for test") |
| ingress_port = of_ports[0]; |
| egress_port1 = of_ports[1]; |
| egress_port2 = of_ports[2]; |
| |
| rc = delete_all_flows(self.controller) |
| self.assertEqual(rc, 0, "Failed to delete all flows") |
| |
| pkt1 = simple_tcp_packet() |
| flow_mod_msg1 = self.buildFlowModMsg(pkt1, ingress_port, egress_port1) |
| |
| pkt2 = simple_tcp_packet(dl_src='0:7:7:7:7:7') |
| flow_mod_msg2 = self.buildFlowModMsg(pkt2, ingress_port, egress_port2) |
| |
| logging.info("Inserting flow1") |
| rv = self.controller.message_send(flow_mod_msg1) |
| self.assertTrue(rv != -1, "Error installing flow mod") |
| logging.info("Inserting flow2") |
| rv = self.controller.message_send(flow_mod_msg2) |
| self.assertTrue(rv != -1, "Error installing flow mod") |
| self.assertEqual(do_barrier(self.controller), 0, "Barrier failed") |
| |
| num_pkt1s = random.randint(10,30) |
| logging.info("Sending " + str(num_pkt1s) + " pkt1s") |
| num_pkt2s = random.randint(10,30) |
| logging.info("Sending " + str(num_pkt2s) + " pkt2s") |
| for i in range(0,num_pkt1s): |
| sendPacket(self, pkt1, ingress_port, egress_port1, test_timeout) |
| for i in range(0,num_pkt2s): |
| sendPacket(self, pkt2, ingress_port, egress_port2, test_timeout) |
| |
| # loop on flow stats request until timeout |
| match = packet_to_flow_match(self, pkt1) |
| match.wildcards |= ofp.OFPFW_DL_SRC |
| self.verifyAggFlowStats(match, ofp.OFPP_NONE, test_timeout, |
| 2, num_pkt1s+num_pkt2s) |
| |
| # out_port filter for egress_port1 |
| self.verifyAggFlowStats(match, egress_port1, test_timeout, |
| 1, num_pkt1s) |
| |
| # out_port filter for egress_port1 |
| self.verifyAggFlowStats(match, egress_port2, test_timeout, |
| 1, num_pkt2s) |
| |
| class EmptyFlowStats(base_tests.SimpleDataPlane): |
| """ |
| Verify the switch replies to a flow stats request when |
| the query doesn't match any flows. |
| """ |
| def runTest(self): |
| rc = delete_all_flows(self.controller) |
| self.assertEqual(rc, 0, "Failed to delete all flows") |
| match = ofp.ofp_match() |
| match.wildcards = 0 |
| stat_req = message.flow_stats_request() |
| stat_req.match = match |
| stat_req.table_id = 0xff |
| stat_req.out_port = ofp.OFPP_NONE |
| |
| response, pkt = self.controller.transact(stat_req) |
| self.assertTrue(response is not None, |
| "No response to stats request") |
| self.assertEquals(len(response.stats), 0) |
| self.assertEquals(response.flags, 0) |
| |
| class EmptyAggregateStats(base_tests.SimpleDataPlane): |
| """ |
| Verify aggregate flow stats are properly retrieved when |
| the query doesn't match any flows. |
| """ |
| def runTest(self): |
| rc = delete_all_flows(self.controller) |
| self.assertEqual(rc, 0, "Failed to delete all flows") |
| match = ofp.ofp_match() |
| match.wildcards = 0 |
| stat_req = message.aggregate_stats_request() |
| stat_req.match = match |
| stat_req.table_id = 0xff |
| stat_req.out_port = ofp.OFPP_NONE |
| |
| response, pkt = self.controller.transact(stat_req) |
| self.assertTrue(response is not None, |
| "No response to stats request") |
| self.assertTrue(len(response.stats) == 1, |
| "Did not receive flow stats reply") |
| self.assertEquals(response.stats[0].flow_count, 0) |
| self.assertEquals(response.stats[0].packet_count, 0) |
| self.assertEquals(response.stats[0].byte_count, 0) |