| |
| import sys |
| import copy |
| |
| try: |
| import scapy.all as scapy |
| except: |
| try: |
| import scapy as scapy |
| except: |
| sys.exit("Need to install scapy for packet parsing") |
| |
| 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 logging |
| import types |
| import time |
| |
| global skipped_test_count |
| skipped_test_count = 0 |
| |
| # Some useful defines |
| IP_ETHERTYPE = 0x800 |
| TCP_PROTOCOL = 0x6 |
| UDP_PROTOCOL = 0x11 |
| |
| MINSIZE = 0 |
| |
| def delete_all_flows(ctrl): |
| """ |
| Delete all flows on the switch |
| @param ctrl The controller object for the test |
| """ |
| |
| logging.info("Deleting all flows") |
| msg = message.flow_mod() |
| msg.match.wildcards = ofp.OFPFW_ALL |
| msg.out_port = ofp.OFPP_NONE |
| msg.command = ofp.OFPFC_DELETE |
| msg.buffer_id = 0xffffffff |
| return ctrl.message_send(msg) |
| |
| def required_wildcards(parent): |
| w = test_param_get('required_wildcards', default='default') |
| if w == 'l3-l4': |
| return (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) |
| else: |
| return 0 |
| |
| def simple_tcp_packet(pktlen=100, |
| dl_dst='00:01:02:03:04:05', |
| dl_src='00:06:07:08:09:0a', |
| dl_vlan_enable=False, |
| dl_vlan=0, |
| dl_vlan_pcp=0, |
| dl_vlan_cfi=0, |
| ip_src='192.168.0.1', |
| ip_dst='192.168.0.2', |
| ip_tos=0, |
| tcp_sport=1234, |
| tcp_dport=80, |
| ip_ihl=None, |
| ip_options=False |
| ): |
| """ |
| Return a simple dataplane TCP packet |
| |
| Supports a few parameters: |
| @param len Length of packet in bytes w/o CRC |
| @param dl_dst Destinatino MAC |
| @param dl_src Source MAC |
| @param dl_vlan_enable True if the packet is with vlan, False otherwise |
| @param dl_vlan VLAN ID |
| @param dl_vlan_pcp VLAN priority |
| @param ip_src IP source |
| @param ip_dst IP destination |
| @param ip_tos IP ToS |
| @param tcp_dport TCP destination port |
| @param ip_sport TCP source port |
| |
| Generates a simple TCP request. Users |
| shouldn't assume anything about this packet other than that |
| it is a valid ethernet/IP/TCP frame. |
| """ |
| |
| if MINSIZE > pktlen: |
| pktlen = MINSIZE |
| |
| # Note Dot1Q.id is really CFI |
| if (dl_vlan_enable): |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.Dot1Q(prio=dl_vlan_pcp, id=dl_vlan_cfi, vlan=dl_vlan)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl)/ \ |
| scapy.TCP(sport=tcp_sport, dport=tcp_dport) |
| else: |
| if not ip_options: |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl)/ \ |
| scapy.TCP(sport=tcp_sport, dport=tcp_dport) |
| else: |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl, options=ip_options)/ \ |
| scapy.TCP(sport=tcp_sport, dport=tcp_dport) |
| |
| pkt = pkt/("D" * (pktlen - len(pkt))) |
| |
| return pkt |
| |
| def simple_udp_packet(pktlen=100, |
| dl_dst='00:01:02:03:04:05', |
| dl_src='00:06:07:08:09:0a', |
| dl_vlan_enable=False, |
| dl_vlan=0, |
| dl_vlan_pcp=0, |
| dl_vlan_cfi=0, |
| ip_src='192.168.0.1', |
| ip_dst='192.168.0.2', |
| ip_tos=0, |
| udp_sport=1234, |
| udp_dport=80, |
| ip_ihl=None, |
| ip_options=False |
| ): |
| """ |
| Return a simple dataplane UDP packet |
| |
| Supports a few parameters: |
| @param len Length of packet in bytes w/o CRC |
| @param dl_dst Destination MAC |
| @param dl_src Source MAC |
| @param dl_vlan_enable True if the packet is with vlan, False otherwise |
| @param dl_vlan VLAN ID |
| @param dl_vlan_pcp VLAN priority |
| @param ip_src IP source |
| @param ip_dst IP destination |
| @param ip_tos IP ToS |
| @param udp_dport UDP destination port |
| @param udp_sport UDP source port |
| |
| Generates a simple UDP packet. Users shouldn't assume anything about |
| this packet other than that it is a valid ethernet/IP/UDP frame. |
| """ |
| |
| if MINSIZE > pktlen: |
| pktlen = MINSIZE |
| |
| # Note Dot1Q.id is really CFI |
| if (dl_vlan_enable): |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.Dot1Q(prio=dl_vlan_pcp, id=dl_vlan_cfi, vlan=dl_vlan)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl)/ \ |
| scapy.UDP(sport=udp_sport, dport=udp_dport) |
| else: |
| if not ip_options: |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl)/ \ |
| scapy.UDP(sport=udp_sport, dport=udp_dport) |
| else: |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl, options=ip_options)/ \ |
| scapy.UDP(sport=udp_sport, dport=udp_dport) |
| |
| pkt = pkt/("D" * (pktlen - len(pkt))) |
| |
| return pkt |
| |
| def simple_icmp_packet(pktlen=60, |
| dl_dst='00:01:02:03:04:05', |
| dl_src='00:06:07:08:09:0a', |
| dl_vlan_enable=False, |
| dl_vlan=0, |
| dl_vlan_pcp=0, |
| ip_src='192.168.0.1', |
| ip_dst='192.168.0.2', |
| ip_tos=0, |
| icmp_type=8, |
| icmp_code=0 |
| ): |
| """ |
| Return a simple ICMP packet |
| |
| Supports a few parameters: |
| @param len Length of packet in bytes w/o CRC |
| @param dl_dst Destinatino MAC |
| @param dl_src Source MAC |
| @param dl_vlan_enable True if the packet is with vlan, False otherwise |
| @param dl_vlan VLAN ID |
| @param dl_vlan_pcp VLAN priority |
| @param ip_src IP source |
| @param ip_dst IP destination |
| @param ip_tos IP ToS |
| @param icmp_type ICMP type |
| @param icmp_code ICMP code |
| |
| Generates a simple ICMP ECHO REQUEST. Users |
| shouldn't assume anything about this packet other than that |
| it is a valid ethernet/ICMP frame. |
| """ |
| |
| if MINSIZE > pktlen: |
| pktlen = MINSIZE |
| |
| if (dl_vlan_enable): |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.Dot1Q(prio=dl_vlan_pcp, id=0, vlan=dl_vlan)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos)/ \ |
| scapy.ICMP(type=icmp_type, code=icmp_code) |
| else: |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos)/ \ |
| scapy.ICMP(type=icmp_type, code=icmp_code) |
| |
| pkt = pkt/("0" * (pktlen - len(pkt))) |
| |
| return pkt |
| |
| def simple_eth_packet(pktlen=60, |
| dl_dst='00:01:02:03:04:05', |
| dl_src='01:80:c2:00:00:00', |
| dl_type=0x88cc): |
| |
| if MINSIZE > pktlen: |
| pktlen = MINSIZE |
| |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src, type=dl_type) |
| |
| pkt = pkt/("0" * (pktlen - len(pkt))) |
| |
| return pkt |
| |
| def qinq_tcp_packet(pktlen=100, |
| dl_dst='00:01:02:03:04:05', |
| dl_src='00:06:07:08:09:0a', |
| dl_vlan_outer=20, |
| dl_vlan_pcp_outer=0, |
| dl_vlan_cfi_outer=0, |
| dl_vlan=10, |
| dl_vlan_pcp=0, |
| dl_vlan_cfi=0, |
| ip_src='192.168.0.1', |
| ip_dst='192.168.0.2', |
| ip_tos=0, |
| tcp_sport=1234, |
| tcp_dport=80, |
| ip_ihl=None, |
| ip_options=False |
| ): |
| """ |
| Return a doubly tagged dataplane TCP packet |
| |
| Supports a few parameters: |
| @param len Length of packet in bytes w/o CRC |
| @param dl_dst Destinatino MAC |
| @param dl_src Source MAC |
| @param dl_vlan_outer Outer VLAN ID |
| @param dl_vlan_pcp_outer Outer VLAN priority |
| @param dl_vlan_cfi_outer Outer VLAN cfi bit |
| @param dl_vlan Inner VLAN ID |
| @param dl_vlan_pcp VLAN priority |
| @param dl_vlan_cfi VLAN cfi bit |
| @param ip_src IP source |
| @param ip_dst IP destination |
| @param ip_tos IP ToS |
| @param tcp_dport TCP destination port |
| @param ip_sport TCP source port |
| |
| Generates a TCP request. Users |
| shouldn't assume anything about this packet other than that |
| it is a valid ethernet/IP/TCP frame. |
| """ |
| |
| if MINSIZE > pktlen: |
| pktlen = MINSIZE |
| |
| # Note Dot1Q.id is really CFI |
| pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \ |
| scapy.Dot1Q(prio=dl_vlan_pcp_outer, id=dl_vlan_cfi_outer, vlan=dl_vlan_outer)/ \ |
| scapy.Dot1Q(prio=dl_vlan_pcp, id=dl_vlan_cfi, vlan=dl_vlan)/ \ |
| scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos, ihl=ip_ihl)/ \ |
| scapy.TCP(sport=tcp_sport, dport=tcp_dport) |
| |
| pkt = pkt/("D" * (pktlen - len(pkt))) |
| |
| return pkt |
| |
| def do_barrier(ctrl, timeout=-1): |
| """ |
| Do a barrier command |
| Return 0 on success, -1 on error |
| """ |
| b = message.barrier_request() |
| (resp, pkt) = ctrl.transact(b, timeout=timeout) |
| # We'll trust the transaction processing in the controller that xid matched |
| if not resp: |
| return -1 |
| return 0 |
| |
| def port_config_get(controller, port_no): |
| """ |
| Get a port's configuration |
| |
| Gets the switch feature configuration and grabs one port's |
| configuration |
| |
| @returns (hwaddr, config, advert) The hwaddress, configuration and |
| advertised values |
| """ |
| request = message.features_request() |
| reply, pkt = controller.transact(request) |
| logging.debug(reply.show()) |
| if reply is None: |
| logging.warn("Get feature request failed") |
| return None, None, None |
| for idx in range(len(reply.ports)): |
| if reply.ports[idx].port_no == port_no: |
| return (reply.ports[idx].hw_addr, reply.ports[idx].config, |
| reply.ports[idx].advertised) |
| |
| logging.warn("Did not find port number for port config") |
| return None, None, None |
| |
| def port_config_set(controller, port_no, config, mask): |
| """ |
| Set the port configuration according the given parameters |
| |
| Gets the switch feature configuration and updates one port's |
| configuration value according to config and mask |
| """ |
| logging.info("Setting port " + str(port_no) + " to config " + str(config)) |
| request = message.features_request() |
| reply, pkt = controller.transact(request) |
| if reply is None: |
| return -1 |
| logging.debug(reply.show()) |
| for idx in range(len(reply.ports)): |
| if reply.ports[idx].port_no == port_no: |
| break |
| if idx >= len(reply.ports): |
| return -1 |
| mod = message.port_mod() |
| mod.port_no = port_no |
| mod.hw_addr = reply.ports[idx].hw_addr |
| mod.config = config |
| mod.mask = mask |
| mod.advertise = reply.ports[idx].advertised |
| rv = controller.message_send(mod) |
| return rv |
| |
| def receive_pkt_check(dp, pkt, yes_ports, no_ports, assert_if): |
| """ |
| Check for proper receive packets across all ports |
| @param dp The dataplane object |
| @param pkt Expected packet; may be None if yes_ports is empty |
| @param yes_ports Set or list of ports that should recieve packet |
| @param no_ports Set or list of ports that should not receive packet |
| @param assert_if Object that implements assertXXX |
| """ |
| |
| # Wait this long for packets that we don't expect to receive. |
| # 100ms is (rarely) too short for positive tests on slow |
| # switches but is definitely not too short for a negative test. |
| negative_timeout = 0.1 |
| |
| exp_pkt_arg = None |
| if config["relax"]: |
| exp_pkt_arg = pkt |
| |
| for ofport in yes_ports: |
| logging.debug("Checking for pkt on port " + str(ofport)) |
| (rcv_port, rcv_pkt, pkt_time) = dp.poll( |
| port_number=ofport, exp_pkt=exp_pkt_arg) |
| assert_if.assertTrue(rcv_pkt is not None, |
| "Did not receive pkt on " + str(ofport)) |
| if not dataplane.match_exp_pkt(pkt, rcv_pkt): |
| logging.debug("Sent %s" % format_packet(pkt)) |
| logging.debug("Resp %s" % format_packet(rcv_pkt)) |
| assert_if.assertTrue(dataplane.match_exp_pkt(pkt, rcv_pkt), |
| "Response packet does not match send packet " + |
| "on port " + str(ofport)) |
| if len(no_ports) > 0: |
| time.sleep(negative_timeout) |
| for ofport in no_ports: |
| logging.debug("Negative check for pkt on port " + str(ofport)) |
| (rcv_port, rcv_pkt, pkt_time) = dp.poll( |
| port_number=ofport, timeout=0, exp_pkt=exp_pkt_arg) |
| assert_if.assertTrue(rcv_pkt is None, |
| "Unexpected pkt on port " + str(ofport)) |
| |
| |
| def receive_pkt_verify(parent, egr_ports, exp_pkt, ing_port): |
| """ |
| Receive a packet and verify it matches an expected value |
| @param egr_port A single port or list of ports |
| |
| parent must implement dataplane, assertTrue and assertEqual |
| """ |
| exp_pkt_arg = None |
| if config["relax"]: |
| exp_pkt_arg = exp_pkt |
| |
| if type(egr_ports) == type([]): |
| egr_port_list = egr_ports |
| else: |
| egr_port_list = [egr_ports] |
| |
| # Expect a packet from each port on egr port list |
| for egr_port in egr_port_list: |
| check_port = egr_port |
| if egr_port == ofp.OFPP_IN_PORT: |
| check_port = ing_port |
| (rcv_port, rcv_pkt, pkt_time) = parent.dataplane.poll( |
| port_number=check_port, exp_pkt=exp_pkt_arg) |
| |
| if rcv_pkt is None: |
| logging.error("ERROR: No packet received from " + |
| str(check_port)) |
| |
| parent.assertTrue(rcv_pkt is not None, |
| "Did not receive packet port " + str(check_port)) |
| logging.debug("Packet len " + str(len(rcv_pkt)) + " in on " + |
| str(rcv_port)) |
| |
| if str(exp_pkt) != str(rcv_pkt): |
| logging.error("ERROR: Packet match failed.") |
| logging.debug("Expected len " + str(len(exp_pkt)) + ": " |
| + str(exp_pkt).encode('hex')) |
| logging.debug("Received len " + str(len(rcv_pkt)) + ": " |
| + str(rcv_pkt).encode('hex')) |
| logging.debug("Expected packet: " + inspect_packet(scapy.Ether(str(exp_pkt)))) |
| logging.debug("Received packet: " + inspect_packet(scapy.Ether(str(rcv_pkt)))) |
| parent.assertEqual(str(exp_pkt), str(rcv_pkt), |
| "Packet match error on port " + str(check_port)) |
| |
| def match_verify(parent, req_match, res_match): |
| """ |
| Verify flow matches agree; if they disagree, report where |
| |
| parent must implement assertEqual |
| Use str() to ensure content is compared and not pointers |
| """ |
| |
| parent.assertEqual(req_match.wildcards, res_match.wildcards, |
| 'Match failed: wildcards: ' + hex(req_match.wildcards) + |
| " != " + hex(res_match.wildcards)) |
| parent.assertEqual(req_match.in_port, res_match.in_port, |
| 'Match failed: in_port: ' + str(req_match.in_port) + |
| " != " + str(res_match.in_port)) |
| parent.assertEqual(str(req_match.dl_src), str(res_match.dl_src), |
| 'Match failed: dl_src: ' + str(req_match.dl_src) + |
| " != " + str(res_match.dl_src)) |
| parent.assertEqual(str(req_match.dl_dst), str(res_match.dl_dst), |
| 'Match failed: dl_dst: ' + str(req_match.dl_dst) + |
| " != " + str(res_match.dl_dst)) |
| parent.assertEqual(req_match.dl_vlan, res_match.dl_vlan, |
| 'Match failed: dl_vlan: ' + str(req_match.dl_vlan) + |
| " != " + str(res_match.dl_vlan)) |
| parent.assertEqual(req_match.dl_vlan_pcp, res_match.dl_vlan_pcp, |
| 'Match failed: dl_vlan_pcp: ' + |
| str(req_match.dl_vlan_pcp) + " != " + |
| str(res_match.dl_vlan_pcp)) |
| parent.assertEqual(req_match.dl_type, res_match.dl_type, |
| 'Match failed: dl_type: ' + str(req_match.dl_type) + |
| " != " + str(res_match.dl_type)) |
| |
| if (not(req_match.wildcards & ofp.OFPFW_DL_TYPE) |
| and (req_match.dl_type == IP_ETHERTYPE)): |
| parent.assertEqual(req_match.nw_tos, res_match.nw_tos, |
| 'Match failed: nw_tos: ' + str(req_match.nw_tos) + |
| " != " + str(res_match.nw_tos)) |
| parent.assertEqual(req_match.nw_proto, res_match.nw_proto, |
| 'Match failed: nw_proto: ' + str(req_match.nw_proto) + |
| " != " + str(res_match.nw_proto)) |
| parent.assertEqual(req_match.nw_src, res_match.nw_src, |
| 'Match failed: nw_src: ' + str(req_match.nw_src) + |
| " != " + str(res_match.nw_src)) |
| parent.assertEqual(req_match.nw_dst, res_match.nw_dst, |
| 'Match failed: nw_dst: ' + str(req_match.nw_dst) + |
| " != " + str(res_match.nw_dst)) |
| |
| if (not(req_match.wildcards & ofp.OFPFW_NW_PROTO) |
| and ((req_match.nw_proto == TCP_PROTOCOL) |
| or (req_match.nw_proto == UDP_PROTOCOL))): |
| parent.assertEqual(req_match.tp_src, res_match.tp_src, |
| 'Match failed: tp_src: ' + |
| str(req_match.tp_src) + |
| " != " + str(res_match.tp_src)) |
| parent.assertEqual(req_match.tp_dst, res_match.tp_dst, |
| 'Match failed: tp_dst: ' + |
| str(req_match.tp_dst) + |
| " != " + str(res_match.tp_dst)) |
| |
| def packet_to_flow_match(parent, packet): |
| match = parse.packet_to_flow_match(packet) |
| match.wildcards |= required_wildcards(parent) |
| return match |
| |
| def flow_msg_create(parent, pkt, ing_port=None, action_list=None, wildcards=None, |
| egr_ports=None, egr_queue=None, check_expire=False, in_band=False): |
| """ |
| Create a flow message |
| |
| Match on packet with given wildcards. |
| See flow_match_test for other parameter descriptoins |
| @param egr_queue if not None, make the output an enqueue action |
| @param in_band if True, do not wildcard ingress port |
| @param egr_ports None (drop), single port or list of ports |
| """ |
| match = parse.packet_to_flow_match(pkt) |
| parent.assertTrue(match is not None, "Flow match from pkt failed") |
| if wildcards is None: |
| wildcards = required_wildcards(parent) |
| if in_band: |
| wildcards &= ~ofp.OFPFW_IN_PORT |
| match.wildcards = wildcards |
| match.in_port = ing_port |
| |
| if type(egr_ports) == type([]): |
| egr_port_list = egr_ports |
| else: |
| egr_port_list = [egr_ports] |
| |
| request = message.flow_mod() |
| request.match = match |
| request.buffer_id = 0xffffffff |
| if check_expire: |
| request.flags |= ofp.OFPFF_SEND_FLOW_REM |
| request.hard_timeout = 1 |
| |
| if action_list is not None: |
| for act in action_list: |
| logging.debug("Adding action " + act.show()) |
| request.actions.add(act) |
| |
| # Set up output/enqueue action if directed |
| if egr_queue is not None: |
| parent.assertTrue(egr_ports is not None, "Egress port not set") |
| act = action.action_enqueue() |
| for egr_port in egr_port_list: |
| act.port = egr_port |
| act.queue_id = egr_queue |
| request.actions.add(act) |
| elif egr_ports is not None: |
| for egr_port in egr_port_list: |
| act = action.action_output() |
| act.port = egr_port |
| request.actions.add(act) |
| |
| logging.debug(request.show()) |
| |
| return request |
| |
| def flow_msg_install(parent, request, clear_table_override=None): |
| """ |
| Install a flow mod message in the switch |
| |
| @param parent Must implement controller, assertEqual, assertTrue |
| @param request The request, all set to go |
| @param clear_table If true, clear the flow table before installing |
| """ |
| |
| clear_table = test_param_get('clear_table', default=True) |
| if(clear_table_override != None): |
| clear_table = clear_table_override |
| |
| if clear_table: |
| logging.debug("Clear flow table") |
| rc = delete_all_flows(parent.controller) |
| parent.assertEqual(rc, 0, "Failed to delete all flows") |
| |
| logging.debug("Insert flow") |
| rv = parent.controller.message_send(request) |
| parent.assertTrue(rv != -1, "Error installing flow mod") |
| |
| parent.assertEqual(do_barrier(parent.controller), 0, "Barrier failed") |
| |
| def flow_match_test_port_pair(parent, ing_port, egr_ports, wildcards=None, |
| dl_vlan=-1, pkt=None, exp_pkt=None, |
| action_list=None): |
| """ |
| Flow match test on single TCP packet |
| @param egr_ports A single port or list of ports |
| |
| Run test with packet through switch from ing_port to egr_port |
| See flow_match_test for parameter descriptions |
| """ |
| |
| if wildcards is None: |
| wildcards = required_wildcards(parent) |
| logging.info("Pkt match test: " + str(ing_port) + " to " + |
| str(egr_ports)) |
| logging.debug(" WC: " + hex(wildcards) + " vlan: " + str(dl_vlan)) |
| if pkt is None: |
| pkt = simple_tcp_packet(dl_vlan_enable=(dl_vlan >= 0), dl_vlan=dl_vlan) |
| |
| request = flow_msg_create(parent, pkt, ing_port=ing_port, |
| wildcards=wildcards, egr_ports=egr_ports, |
| action_list=action_list) |
| |
| flow_msg_install(parent, request) |
| |
| logging.debug("Send packet: " + str(ing_port) + " to " + |
| str(egr_ports)) |
| parent.dataplane.send(ing_port, str(pkt)) |
| |
| if exp_pkt is None: |
| exp_pkt = pkt |
| receive_pkt_verify(parent, egr_ports, exp_pkt, ing_port) |
| |
| def flow_match_test_pktout(parent, ing_port, egr_ports, |
| dl_vlan=-1, pkt=None, exp_pkt=None, |
| action_list=None): |
| """ |
| Packet-out test on single TCP packet |
| @param egr_ports A single port or list of ports |
| |
| Run test sending packet-out to egr_ports. The goal is to test the actions |
| taken on the packet, not the matching which is of course irrelevant. |
| See flow_match_test for parameter descriptions |
| """ |
| |
| if pkt is None: |
| pkt = simple_tcp_packet(dl_vlan_enable=(dl_vlan >= 0), dl_vlan=dl_vlan) |
| |
| msg = message.packet_out() |
| msg.in_port = ing_port |
| msg.data = str(pkt) |
| if action_list is not None: |
| for act in action_list: |
| msg.actions.add(act) |
| |
| # Set up output action |
| if egr_ports is not None: |
| for egr_port in egr_ports: |
| act = action.action_output() |
| act.port = egr_port |
| msg.actions.add(act) |
| |
| logging.debug(msg.show()) |
| rv = parent.controller.message_send(msg) |
| parent.assertTrue(rv == 0, "Error sending out message") |
| |
| if exp_pkt is None: |
| exp_pkt = pkt |
| receive_pkt_verify(parent, egr_ports, exp_pkt, ing_port) |
| |
| def get_egr_list(parent, of_ports, how_many, exclude_list=[]): |
| """ |
| Generate a list of ports avoiding those in the exclude list |
| @param parent Supplies logging |
| @param of_ports List of OF port numbers |
| @param how_many Number of ports to be added to the list |
| @param exclude_list List of ports not to be used |
| @returns An empty list if unable to find enough ports |
| """ |
| |
| if how_many == 0: |
| return [] |
| |
| count = 0 |
| egr_ports = [] |
| for egr_idx in range(len(of_ports)): |
| if of_ports[egr_idx] not in exclude_list: |
| egr_ports.append(of_ports[egr_idx]) |
| count += 1 |
| if count >= how_many: |
| return egr_ports |
| logging.debug("Could not generate enough egress ports for test") |
| return [] |
| |
| def flow_match_test(parent, port_map, wildcards=None, dl_vlan=-1, pkt=None, |
| exp_pkt=None, action_list=None, |
| max_test=0, egr_count=1, ing_port=False): |
| """ |
| Run flow_match_test_port_pair on all port pairs and packet-out |
| |
| @param max_test If > 0 no more than this number of tests are executed. |
| @param parent Must implement controller, dataplane, assertTrue, assertEqual |
| and logging |
| @param pkt If not None, use this packet for ingress |
| @param wildcards For flow match entry |
| @param dl_vlan If not -1, and pkt is None, create a pkt w/ VLAN tag |
| @param exp_pkt If not None, use this as the expected output pkt; els use pkt |
| @param action_list Additional actions to add to flow mod |
| @param egr_count Number of egress ports; -1 means get from config w/ dflt 2 |
| """ |
| if wildcards is None: |
| wildcards = required_wildcards(parent) |
| of_ports = port_map.keys() |
| of_ports.sort() |
| parent.assertTrue(len(of_ports) > 1, "Not enough ports for test") |
| test_count = 0 |
| |
| if egr_count == -1: |
| egr_count = test_param_get('egr_count', default=2) |
| |
| for ing_idx in range(len(of_ports)): |
| ingress_port = of_ports[ing_idx] |
| egr_ports = get_egr_list(parent, of_ports, egr_count, |
| exclude_list=[ingress_port]) |
| if ing_port: |
| egr_ports.append(ofp.OFPP_IN_PORT) |
| if len(egr_ports) == 0: |
| parent.assertTrue(0, "Failed to generate egress port list") |
| |
| flow_match_test_port_pair(parent, ingress_port, egr_ports, |
| wildcards=wildcards, dl_vlan=dl_vlan, |
| pkt=pkt, exp_pkt=exp_pkt, |
| action_list=action_list) |
| test_count += 1 |
| if (max_test > 0) and (test_count > max_test): |
| logging.info("Ran " + str(test_count) + " tests; exiting") |
| break |
| |
| |
| ingress_port = of_ports[0] |
| egr_ports = get_egr_list(parent, of_ports, egr_count, |
| exclude_list=[ingress_port]) |
| if ing_port: |
| egr_ports.append(ofp.OFPP_IN_PORT) |
| flow_match_test_pktout(parent, ingress_port, egr_ports, |
| dl_vlan=dl_vlan, |
| pkt=pkt, exp_pkt=exp_pkt, |
| action_list=action_list) |
| |
| def test_param_get(key, default=None): |
| """ |
| Return value passed via test-params if present |
| |
| @param key The lookup key |
| @param default Default value to use if not found |
| |
| If the pair 'key=val' appeared in the string passed to --test-params |
| on the command line, return val (as interpreted by exec). Otherwise |
| return default value. |
| |
| WARNING: TEST PARAMETERS MUST BE PYTHON IDENTIFIERS; |
| eg egr_count, not egr-count. |
| """ |
| try: |
| exec config["test_params"] |
| except: |
| return default |
| |
| s = "val = " + str(key) |
| try: |
| exec s |
| return val |
| except: |
| return default |
| |
| def action_generate(parent, field_to_mod, mod_field_vals): |
| """ |
| Create an action to modify the field indicated in field_to_mod |
| |
| @param parent Must implement, assertTrue |
| @param field_to_mod The field to modify as a string name |
| @param mod_field_vals Hash of values to use for modified values |
| """ |
| |
| act = None |
| |
| if field_to_mod in ['pktlen']: |
| return None |
| |
| if field_to_mod == 'dl_dst': |
| act = action.action_set_dl_dst() |
| act.dl_addr = parse.parse_mac(mod_field_vals['dl_dst']) |
| elif field_to_mod == 'dl_src': |
| act = action.action_set_dl_src() |
| act.dl_addr = parse.parse_mac(mod_field_vals['dl_src']) |
| elif field_to_mod == 'dl_vlan_enable': |
| if not mod_field_vals['dl_vlan_enable']: # Strip VLAN tag |
| act = action.action_strip_vlan() |
| # Add VLAN tag is handled by dl_vlan field |
| # Will return None in this case |
| elif field_to_mod == 'dl_vlan': |
| act = action.action_set_vlan_vid() |
| act.vlan_vid = mod_field_vals['dl_vlan'] |
| elif field_to_mod == 'dl_vlan_pcp': |
| act = action.action_set_vlan_pcp() |
| act.vlan_pcp = mod_field_vals['dl_vlan_pcp'] |
| elif field_to_mod == 'ip_src': |
| act = action.action_set_nw_src() |
| act.nw_addr = parse.parse_ip(mod_field_vals['ip_src']) |
| elif field_to_mod == 'ip_dst': |
| act = action.action_set_nw_dst() |
| act.nw_addr = parse.parse_ip(mod_field_vals['ip_dst']) |
| elif field_to_mod == 'ip_tos': |
| act = action.action_set_nw_tos() |
| act.nw_tos = mod_field_vals['ip_tos'] |
| elif field_to_mod == 'tcp_sport': |
| act = action.action_set_tp_src() |
| act.tp_port = mod_field_vals['tcp_sport'] |
| elif field_to_mod == 'tcp_dport': |
| act = action.action_set_tp_dst() |
| act.tp_port = mod_field_vals['tcp_dport'] |
| elif field_to_mod == 'udp_sport': |
| act = action.action_set_tp_src() |
| act.tp_port = mod_field_vals['udp_sport'] |
| elif field_to_mod == 'udp_dport': |
| act = action.action_set_tp_dst() |
| act.tp_port = mod_field_vals['udp_dport'] |
| else: |
| parent.assertTrue(0, "Unknown field to modify: " + str(field_to_mod)) |
| |
| return act |
| |
| def pkt_action_setup(parent, start_field_vals={}, mod_field_vals={}, |
| mod_fields=[], tp="tcp", check_test_params=False): |
| """ |
| Set up the ingress and expected packet and action list for a test |
| |
| @param parent Must implement assertTrue |
| @param start_field_values Field values to use for ingress packet (optional) |
| @param mod_field_values Field values to use for modified packet (optional) |
| @param mod_fields The list of fields to be modified by the switch in the test. |
| @params check_test_params If True, will check the parameters vid, add_vlan |
| and strip_vlan from the command line. |
| |
| Returns a triple: pkt-to-send, expected-pkt, action-list |
| """ |
| |
| new_actions = [] |
| |
| base_pkt_params = {} |
| base_pkt_params['pktlen'] = 100 |
| base_pkt_params['dl_dst'] = '00:DE:F0:12:34:56' |
| base_pkt_params['dl_src'] = '00:23:45:67:89:AB' |
| base_pkt_params['dl_vlan_enable'] = False |
| base_pkt_params['dl_vlan'] = 2 |
| base_pkt_params['dl_vlan_pcp'] = 0 |
| base_pkt_params['ip_src'] = '192.168.0.1' |
| base_pkt_params['ip_dst'] = '192.168.0.2' |
| base_pkt_params['ip_tos'] = 0 |
| if tp == "tcp": |
| base_pkt_params['tcp_sport'] = 1234 |
| base_pkt_params['tcp_dport'] = 80 |
| elif tp == "udp": |
| base_pkt_params['udp_sport'] = 1234 |
| base_pkt_params['udp_dport'] = 80 |
| for keyname in start_field_vals.keys(): |
| base_pkt_params[keyname] = start_field_vals[keyname] |
| |
| mod_pkt_params = {} |
| mod_pkt_params['pktlen'] = 100 |
| mod_pkt_params['dl_dst'] = '00:21:0F:ED:CB:A9' |
| mod_pkt_params['dl_src'] = '00:ED:CB:A9:87:65' |
| mod_pkt_params['dl_vlan_enable'] = False |
| mod_pkt_params['dl_vlan'] = 3 |
| mod_pkt_params['dl_vlan_pcp'] = 7 |
| mod_pkt_params['ip_src'] = '10.20.30.40' |
| mod_pkt_params['ip_dst'] = '50.60.70.80' |
| mod_pkt_params['ip_tos'] = 0xf0 |
| if tp == "tcp": |
| mod_pkt_params['tcp_sport'] = 4321 |
| mod_pkt_params['tcp_dport'] = 8765 |
| elif tp == "udp": |
| mod_pkt_params['udp_sport'] = 4321 |
| mod_pkt_params['udp_dport'] = 8765 |
| for keyname in mod_field_vals.keys(): |
| mod_pkt_params[keyname] = mod_field_vals[keyname] |
| |
| # Check for test param modifications |
| strip = False |
| if check_test_params: |
| add_vlan = test_param_get('add_vlan') |
| strip_vlan = test_param_get('strip_vlan') |
| vid = test_param_get('vid') |
| |
| if add_vlan and strip_vlan: |
| parent.assertTrue(0, "Add and strip VLAN both specified") |
| |
| if vid: |
| base_pkt_params['dl_vlan_enable'] = True |
| base_pkt_params['dl_vlan'] = vid |
| if 'dl_vlan' in mod_fields: |
| mod_pkt_params['dl_vlan'] = vid + 1 |
| |
| if add_vlan: |
| base_pkt_params['dl_vlan_enable'] = False |
| mod_pkt_params['dl_vlan_enable'] = True |
| mod_pkt_params['pktlen'] = base_pkt_params['pktlen'] + 4 |
| mod_fields.append('pktlen') |
| mod_fields.append('dl_vlan_enable') |
| if 'dl_vlan' not in mod_fields: |
| mod_fields.append('dl_vlan') |
| elif strip_vlan: |
| base_pkt_params['dl_vlan_enable'] = True |
| mod_pkt_params['dl_vlan_enable'] = False |
| mod_pkt_params['pktlen'] = base_pkt_params['pktlen'] - 4 |
| mod_fields.append('dl_vlan_enable') |
| mod_fields.append('pktlen') |
| |
| if tp == "tcp": |
| packet_builder = simple_tcp_packet |
| elif tp == "udp": |
| packet_builder = simple_udp_packet |
| else: |
| raise NotImplementedError("unknown transport protocol %s" % tp) |
| |
| # Build the ingress packet |
| ingress_pkt = packet_builder(**base_pkt_params) |
| |
| # Build the expected packet, modifying the indicated fields |
| for item in mod_fields: |
| base_pkt_params[item] = mod_pkt_params[item] |
| act = action_generate(parent, item, mod_pkt_params) |
| if act: |
| new_actions.append(act) |
| |
| expected_pkt = packet_builder(**base_pkt_params) |
| |
| return (ingress_pkt, expected_pkt, new_actions) |
| |
| # Generate a simple "drop" flow mod |
| # If in_band is true, then only drop from first test port |
| def flow_mod_gen(port_map, in_band): |
| request = message.flow_mod() |
| request.match.wildcards = ofp.OFPFW_ALL |
| if in_band: |
| request.match.wildcards = ofp.OFPFW_ALL - ofp.OFPFW_IN_PORT |
| for of_port, ifname in port_map.items(): # Grab first port |
| break |
| request.match.in_port = of_port |
| request.buffer_id = 0xffffffff |
| return request |
| |
| def skip_message_emit(parent, s): |
| """ |
| Print out a 'skipped' message to stderr |
| |
| @param s The string to print out to the log file |
| @param parent Must implement config object |
| """ |
| global skipped_test_count |
| |
| skipped_test_count += 1 |
| logging.info("Skipping: " + s) |
| if config["dbg_level"] < logging.WARNING: |
| sys.stderr.write("(skipped) ") |
| else: |
| sys.stderr.write("(S)") |
| |
| |
| def all_stats_get(parent): |
| """ |
| Get the aggregate stats for all flows in the table |
| @param parent Test instance with controller connection and assert |
| @returns dict with keys flows, packets, bytes, active (flows), |
| lookups, matched |
| """ |
| stat_req = message.aggregate_stats_request() |
| stat_req.match = ofp.ofp_match() |
| stat_req.match.wildcards = ofp.OFPFW_ALL |
| stat_req.table_id = 0xff |
| stat_req.out_port = ofp.OFPP_NONE |
| |
| rv = {} |
| |
| (reply, pkt) = parent.controller.transact(stat_req) |
| parent.assertTrue(len(reply.stats) == 1, "Did not receive flow stats reply") |
| |
| for obj in reply.stats: |
| (rv["flows"], rv["packets"], rv["bytes"]) = (obj.flow_count, |
| obj.packet_count, obj.byte_count) |
| break |
| |
| request = message.table_stats_request() |
| (reply , pkt) = parent.controller.transact(request) |
| |
| |
| (rv["active"], rv["lookups"], rv["matched"]) = (0,0,0) |
| for obj in reply.stats: |
| rv["active"] += obj.active_count |
| rv["lookups"] += obj.lookup_count |
| rv["matched"] += obj.matched_count |
| |
| return rv |
| |
| FILTER=''.join([(len(repr(chr(x)))==3) and chr(x) or '.' |
| for x in range(256)]) |
| |
| def hex_dump_buffer(src, length=16): |
| """ |
| Convert src to a hex dump string and return the string |
| @param src The source buffer |
| @param length The number of bytes shown in each line |
| @returns A string showing the hex dump |
| """ |
| result = ["\n"] |
| for i in xrange(0, len(src), length): |
| chars = src[i:i+length] |
| hex = ' '.join(["%02x" % ord(x) for x in chars]) |
| printable = ''.join(["%s" % ((ord(x) <= 127 and |
| FILTER[ord(x)]) or '.') for x in chars]) |
| result.append("%04x %-*s %s\n" % (i, length*3, hex, printable)) |
| return ''.join(result) |
| |
| def format_packet(pkt): |
| return "Packet length %d \n%s" % (len(str(pkt)), |
| hex_dump_buffer(str(pkt))) |
| |
| def inspect_packet(pkt): |
| """ |
| Wrapper around scapy's show() method. |
| @returns A string showing the dissected packet. |
| """ |
| from cStringIO import StringIO |
| out = None |
| backup = sys.stdout |
| try: |
| sys.stdout = StringIO() |
| pkt.show2() |
| out = sys.stdout.getvalue() |
| sys.stdout.close() |
| finally: |
| sys.stdout = backup |
| return out |