| from distutils.util import strtobool |
| import copy |
| |
| FALSE = '0' |
| TRUE = '1' |
| DIR_UPLINK = '1' |
| DIR_DOWNLINK = '2' |
| IFACE_ACCESS = '1' |
| IFACE_CORE = '2' |
| TUNNEL_SPORT = '2152' |
| TUNNEL_TYPE_GPDU = '3' |
| |
| UE_PORT = 400 |
| PDN_PORT = 800 |
| GPDU_PORT = 2152 |
| |
| N_FLOWS_PER_UE = 4 |
| |
| |
| class UP4: |
| """ |
| Utility that manages interaction with UP4 via a P4RuntimeCliDriver available |
| in the cluster. Additionally, can verify connectivity by crafting GTP packets |
| via Scapy with an HostDriver component, specified via <enodebs>, <pdn_host>, |
| and <router_mac> parameters. |
| |
| Example params file: |
| <UP4> |
| <pdn_host>Compute1</pdn_host> # Needed to verify connectivity with scapy |
| <enodebs> # List of emulated eNodeBs |
| <enode_1> |
| <host>Compute1</host> # Host that emulates this eNodeB |
| <interface>eno3</interface> # Name of the linux interface to use on the host, if not specified take the default |
| <enb_address>10.32.11.122</enb_address> # IP address of the eNodeB |
| <ues>ue3</ues> # Emulated ues connected to this eNB |
| </enode_1> |
| <enodeb_2> |
| <host>Compute3</host> |
| <enb_address>10.32.11.194</enb_address> |
| <ues>ue1,ue2</ues> |
| </enodeb_2> |
| </enodebs> |
| <enodeb_host>Compute3</enodeb_host> |
| <router_mac>00:00:0A:4C:1C:46</router_mac> # Needed to verify connectivity with scapy |
| <s1u_address>10.32.11.126</s1u_address> |
| <ues> |
| <ue2> |
| <pfcp_session_id>100</pfcp_session_id> |
| <ue_address>10.240.0.2</ue_address> |
| <teid>200</teid> |
| <up_id>20</up_id> |
| <down_id>21</down_id> |
| <qfi>2</qfi> |
| <five_g>False</five_g> |
| </ue2> |
| </ues> |
| <switch_to_kill>Leaf2</switch_to_kill> # Component name of the switch to kill in CASE 5 |
| <enodebs_fail>enodeb_1</enodebs_fail> # List of eNodeBs that should fail traffic forwarding in CASE 5 |
| </UP4> |
| """ |
| |
| def __init__(self): |
| self.s1u_address = None |
| self.enodebs = None |
| self.pdn_host = None |
| self.pdn_interface = None |
| self.router_mac = None |
| self.emulated_ues = {} |
| self.up4_client = None |
| self.no_host = False |
| |
| def setup(self, p4rt_client, no_host=False): |
| """ |
| Set up P4RT and scapy on eNB and PDN hosts |
| :param p4rt_client: a P4RuntimeCliDriver component |
| :param no_host: True if you don't want to start scapy on the hosts |
| :return: |
| """ |
| self.s1u_address = main.params["UP4"]["s1u_address"] |
| self.emulated_ues = main.params["UP4"]['ues'] |
| self.up4_client = p4rt_client |
| self.no_host = no_host |
| |
| # Optional Parameters |
| |
| self.enodebs = copy.deepcopy((main.params["UP4"]["enodebs"])) |
| for enb in self.enodebs.values(): |
| enb["ues"] = enb["ues"].split(",") |
| enb["host"] = getattr(main, enb["host"]) |
| # If interface not provided by the params, use the default in the host |
| if "interface" not in enb.keys(): |
| enb["interface"] = enb["host"].interfaces[0]["name"] |
| if "pdn_host" in main.params["UP4"]: |
| self.pdn_host = getattr(main, main.params["UP4"]["pdn_host"]) |
| self.pdn_interface = self.pdn_host.interfaces[0] |
| self.router_mac = main.params["UP4"].get("router_mac", None) |
| |
| # Start components |
| self.up4_client.startP4RtClient() |
| if not self.no_host: |
| if self.enodebs is not None: |
| for enb in self.enodebs.values(): |
| enb["host"].startScapy(ifaceName=enb["interface"], |
| enableGtp=True) |
| if self.pdn_host is not None: |
| self.pdn_host.startScapy(ifaceName=self.pdn_interface["name"]) |
| |
| def teardown(self): |
| self.up4_client.stopP4RtClient() |
| if not self.no_host: |
| if self.enodebs is not None: |
| for enb in self.enodebs.values(): |
| enb["host"].stopScapy() |
| if self.pdn_host is not None: |
| self.pdn_host.stopScapy() |
| |
| def attachUes(self): |
| for (name, ue) in self.emulated_ues.items(): |
| ue = UP4.__sanitizeUeData(ue) |
| self.attachUe(name, **ue) |
| |
| def detachUes(self): |
| for (name, ue) in self.emulated_ues.items(): |
| ue = UP4.__sanitizeUeData(ue) |
| self.detachUe(name, **ue) |
| |
| def testUpstreamTraffic(self, enb_names=None, shouldFail=False): |
| if self.enodebs is None or self.pdn_host is None: |
| main.log.error( |
| "Need eNodeB and PDN host params to generate scapy traffic") |
| return |
| # Scapy filter needs to start before sending traffic |
| if enb_names is None or enb_names == []: |
| enodebs = self.enodebs.values() |
| else: |
| enodebs = [self.enodebs[enb] for enb in enb_names] |
| pkt_filter_upstream = "" |
| ues = [] |
| for enb in enodebs: |
| for ue_name in enb["ues"]: |
| ue = self.emulated_ues[ue_name] |
| if "ue_address" in ue: |
| ues.append(ue) |
| if len(pkt_filter_upstream) != 0: |
| pkt_filter_upstream += " or " |
| pkt_filter_upstream += "src host " + ue["ue_address"] |
| pkt_filter_upstream = "ip and udp dst port %s and (%s) and dst host %s" % \ |
| (PDN_PORT, pkt_filter_upstream, |
| self.pdn_interface["ips"][0]) |
| main.log.info("Start listening on %s intf %s" % |
| (self.pdn_host.name, self.pdn_interface["name"])) |
| main.log.debug("BPF Filter Upstream: \n %s" % pkt_filter_upstream) |
| self.pdn_host.startFilter(ifaceName=self.pdn_interface["name"], |
| sniffCount=len(ues), |
| pktFilter=pkt_filter_upstream) |
| |
| main.log.info( |
| "Sending %d packets from eNodeB host" % len(ues)) |
| for enb in enodebs: |
| for ue_name in enb["ues"]: |
| main.log.info(ue_name) |
| ue = self.emulated_ues[ue_name] |
| main.log.info(str(ue)) |
| UP4.buildGtpPacket(enb["host"], |
| src_ip_outer=enb["enb_address"], |
| dst_ip_outer=self.s1u_address, |
| src_ip_inner=ue["ue_address"], |
| dst_ip_inner=self.pdn_interface["ips"][0], |
| src_udp_inner=UE_PORT, |
| dst_udp_inner=PDN_PORT, |
| teid=int(ue["teid"])) |
| enb["host"].sendPacket(iface=enb["interface"]) |
| |
| packets = UP4.checkFilterAndGetPackets(self.pdn_host) |
| fail = False |
| if len(ues) != packets.count('Ether'): |
| fail = True |
| msg = "Failed to capture packets in PDN.\n" + str(packets) |
| else: |
| msg = "Correctly captured packet in PDN. " |
| # We expect exactly 1 packet per UE |
| pktsFiltered = [packets.count("src=" + ue["ue_address"]) for ue in ues] |
| if pktsFiltered.count(1) != len(pktsFiltered): |
| fail = True |
| msg += "\nError on the number of packets per UE in downstream.\n" + str(packets) |
| else: |
| msg += "\nOne packet per UE in upstream. " |
| |
| utilities.assert_equal( |
| expect=shouldFail, actual=fail, onpass=msg, onfail=msg) |
| |
| def testDownstreamTraffic(self, enb_names=None, shouldFail=False): |
| if self.enodebs is None or self.pdn_host is None: |
| main.log.error( |
| "Need eNodeB and PDN host params to generate scapy traffic") |
| return |
| if enb_names is None or enb_names == []: |
| enodebs = self.enodebs.values() |
| else: |
| enodebs = [self.enodebs[enb] for enb in enb_names] |
| pkt_filter_downstream = "ip and udp src port %d and udp dst port %d and src host %s" % ( |
| GPDU_PORT, GPDU_PORT, self.s1u_address) |
| ues = [] |
| for enb in enodebs: |
| filter_down = pkt_filter_downstream + " and dst host %s" % enb["enb_address"] |
| main.log.info("Start listening on %s intf %s" % ( |
| enb["host"], enb["interface"])) |
| main.log.debug("BPF Filter Downstream: \n %s" % filter_down) |
| enb["host"].startFilter(ifaceName=enb["interface"], |
| sniffCount=len(enb["ues"]), |
| pktFilter=filter_down) |
| ues.extend([self.emulated_ues[ue_name] for ue_name in enb["ues"]]) |
| |
| main.log.info( |
| "Sending %d packets from PDN host" % len(ues)) |
| for ue in ues: |
| # From PDN we have to set dest MAC, otherwise scapy will do ARP |
| # request for the UE IP address. |
| UP4.buildUdpPacket(self.pdn_host, |
| dst_eth=self.router_mac, |
| src_ip=self.pdn_interface["ips"][0], |
| dst_ip=ue["ue_address"], |
| src_udp=PDN_PORT, |
| dst_udp=UE_PORT) |
| self.pdn_host.sendPacket(iface=self.pdn_interface["name"]) |
| packets = "" |
| for enb in enodebs: |
| pkt = UP4.checkFilterAndGetPackets(enb["host"]) |
| packets += pkt |
| # The BPF filter might capture non-GTP packets because we can't filter |
| # GTP header in BPF. For this reason, check that the captured packets |
| # are from the expected tunnels. |
| # TODO: check inner UDP and IP fields as well |
| # FIXME: with newer scapy TEID becomes teid (required for Scapy 2.4.5) |
| pktsFiltered= [packets.count("TEID=" + hex(int(ue["teid"])) + "L ") |
| for ue in ues] |
| main.log.info("PACKETS: " + str(packets)) |
| main.log.info("PKTs Filtered: " + str(pktsFiltered)) |
| fail = False |
| if len(ues) != sum(pktsFiltered): |
| fail = True |
| msg = "Failed to capture packets in eNodeB.\n" + str(packets) |
| else: |
| msg = "Correctly captured packets in eNodeB. " |
| # We expect exactly 1 packet per UE |
| if pktsFiltered.count(1) != len(pktsFiltered): |
| fail = True |
| msg += "\nError on the number of packets per GTP TEID in downstream.\n" + str(packets) |
| else: |
| msg += "\nOne packet per GTP TEID in downstream. " |
| |
| utilities.assert_equal( |
| expect=shouldFail, actual=fail, onpass=msg, onfail=msg) |
| |
| def readPdrsNumber(self): |
| """ |
| Read the PDRs table and return the number of entries in the PDRs table |
| |
| :return: Number of entries in the PDRs table |
| """ |
| tableName = 'PreQosPipe.pdrs' |
| return self.up4_client.readNumberTableEntries(tableName) |
| |
| def readFarsNumber(self): |
| """ |
| Read the FARs table and return the number of entries in the FARs table |
| |
| :return: Number of entries in the FARs table |
| """ |
| tableName = 'PreQosPipe.load_far_attributes' |
| return self.up4_client.readNumberTableEntries(tableName) |
| |
| def verifyUesFlowNumberP4rt(self): |
| """ |
| Verify via P4RT CLI that the number of PDRs and FARs is the expected one |
| |
| :return: True if the number of PDRs and FARs is expected, False otherwise |
| """ |
| nPdrs = self.readPdrsNumber() |
| nFars = self.readFarsNumber() |
| return nPdrs == nFars == len(self.emulated_ues) * 2 |
| |
| def verifyNoUesFlowNumberP4rt(self, preInstalledUes=0): |
| """ |
| Verify via P4RT CLI that there is no PDRs and FARs installed. |
| |
| :param preInstalledUes: Number of UEs whose PDRs and FARs are still programmed |
| :return: |
| """ |
| return self.readPdrsNumber() == self.readFarsNumber() == preInstalledUes * 2 |
| |
| def verifyNoUesFlow(self, onosCli, retries=10): |
| """ |
| Verify that no PDRs and FARs are installed in ONOS. |
| |
| :param onosCli: An instance of a OnosCliDriver |
| :param retries: number of retries |
| :return: |
| """ |
| retValue = utilities.retry(f=UP4.__verifyNoPdrsFarsOnos, |
| retValue=False, |
| args=[onosCli], |
| sleep=5, |
| attempts=retries) |
| utilities.assert_equal(expect=True, |
| actual=retValue, |
| onpass="No PDRs and FARs in ONOS", |
| onfail="Stale PDRs or FARs") |
| |
| @staticmethod |
| def __verifyNoPdrsFarsOnos(onosCli): |
| """ |
| Verify that no PDRs and FARs are installed in ONOS |
| |
| :param onosCli: An instance of a OnosCliDriver |
| """ |
| pdrs = onosCli.sendline(cmdStr="up4:read-pdrs", showResponse=True, |
| noExit=True, expectJson=False) |
| fars = onosCli.sendline(cmdStr="up4:read-fars", showResponse=True, |
| noExit=True, expectJson=False) |
| return pdrs == "" and fars == "" |
| |
| def verifyUp4Flow(self, onosCli, retries=10): |
| """ |
| Verify PDRs and FARs installed via UP4 using the ONOS CLI. |
| |
| :param onosCli: An instance of a OnosCliDriver |
| :param retries: Number of retries |
| """ |
| failString="" |
| retValue = utilities.retry(f=self.__internalVerifyUp4Flow, |
| retValue=False, |
| args=[onosCli, failString], |
| sleep=5, |
| attempts=retries) |
| utilities.assert_equal( |
| expect=True, |
| actual=retValue, |
| onpass="Correct PDRs and FARs in ONOS", |
| onfail="Wrong PDRs and FARs in ONOS. Missing PDR/FAR:\n" + failString |
| ) |
| |
| def __internalVerifyUp4Flow(self, onosCli, failMsg=""): |
| pdrs = onosCli.sendline(cmdStr="up4:read-pdrs", showResponse=True, |
| noExit=True, expectJson=False) |
| fars = onosCli.sendline(cmdStr="up4:read-fars", showResponse=True, |
| noExit=True, expectJson=False) |
| fail = False |
| for (ue_name, ue) in self.emulated_ues.items(): |
| if pdrs.count(self.upPdrOnosString(**ue)) != 1: |
| failMsg += self.upPdrOnosString(**ue) + "\n" |
| fail = True |
| if pdrs.count(self.downPdrOnosString(**ue)) != 1: |
| failMsg += self.downPdrOnosString(**ue) + "\n" |
| fail = True |
| if fars.count(self.upFarOnosString(**ue)) != 1: |
| failMsg += self.upFarOnosString(**ue) + "\n" |
| fail = True |
| if fars.count(self.downFarOnosString(ue_name, **ue)) != 1: |
| failMsg += self.downFarOnosString(ue_name, **ue) + "\n" |
| fail = True |
| return not fail |
| |
| def upPdrOnosString(self, pfcp_session_id, teid=None, up_id=None, |
| teid_up=None, far_id_up=None, ctr_id_up=None, qfi=None, |
| **kwargs): |
| # TODO: consider that with five_g the output might be different |
| if up_id is not None: |
| far_id_up = up_id |
| ctr_id_up = up_id |
| if teid is not None: |
| teid_up = teid |
| if qfi is not None: |
| return "PDR{{Match(Dst={}, TEID={}) -> LoadParams(SEID={}, FAR={}, CtrIdx={}, QFI={})}}".format( |
| self.s1u_address, hex(int(teid_up)), hex(int(pfcp_session_id)), |
| far_id_up, ctr_id_up, qfi) |
| return "PDR{{Match(Dst={}, TEID={}) -> LoadParams(SEID={}, FAR={}, CtrIdx={})}}".format( |
| self.s1u_address, hex(int(teid_up)), hex(int(pfcp_session_id)), |
| far_id_up, ctr_id_up) |
| |
| def downPdrOnosString(self, pfcp_session_id, ue_address, down_id=None, |
| far_id_down=None, ctr_id_down=None, qfi=None, |
| **kwargs): |
| # TODO: consider that with five_g the output might be different |
| if down_id is not None: |
| far_id_down = down_id |
| ctr_id_down = down_id |
| if qfi is not None: |
| return "PDR{{Match(Dst={}, !GTP) -> LoadParams(SEID={}, FAR={}, CtrIdx={}, QFI={})}}".format( |
| ue_address, hex(int(pfcp_session_id)), far_id_down, ctr_id_down, |
| qfi) |
| return "PDR{{Match(Dst={}, !GTP) -> LoadParams(SEID={}, FAR={}, CtrIdx={})}}".format( |
| ue_address, hex(int(pfcp_session_id)), far_id_down, ctr_id_down) |
| |
| def downFarOnosString(self, ue_name, pfcp_session_id, teid=None, down_id=None, |
| teid_down=None, far_id_down=None, **kwargs): |
| if down_id is not None: |
| far_id_down = down_id |
| if teid is not None: |
| teid_down = teid |
| enb_address = self.__getEnbAddress(ue_name) |
| return "FAR{{Match(ID={}, SEID={}) -> Encap(Src={}, SPort={}, TEID={}, Dst={})}}".format( |
| far_id_down, hex(int(pfcp_session_id)), self.s1u_address, GPDU_PORT, |
| hex(int(teid_down)), enb_address) |
| |
| def upFarOnosString(self, pfcp_session_id, up_id=None, far_id_up=None, |
| **kwargs): |
| if up_id is not None: |
| far_id_up = up_id |
| return "FAR{{Match(ID={}, SEID={}) -> Forward()}}".format( |
| far_id_up, hex(int(pfcp_session_id))) |
| |
| @staticmethod |
| def __sanitizeUeData(ue): |
| if "five_g" in ue and type(ue["five_g"]) != bool: |
| ue["five_g"] = bool(strtobool(ue["five_g"])) |
| if "qfi" in ue and ue["qfi"] == "": |
| ue["qfi"] = None |
| return ue |
| |
| def attachUe(self, ue_name, pfcp_session_id, ue_address, |
| teid=None, up_id=None, down_id=None, |
| teid_up=None, teid_down=None, |
| pdr_id_up=None, far_id_up=None, ctr_id_up=None, |
| pdr_id_down=None, far_id_down=None, ctr_id_down=None, |
| qfi=None, five_g=False): |
| self.__programUp4Rules(ue_name, |
| pfcp_session_id, |
| ue_address, |
| teid, up_id, down_id, |
| teid_up, teid_down, |
| pdr_id_up, far_id_up, ctr_id_up, |
| pdr_id_down, far_id_down, ctr_id_down, |
| qfi, five_g, action="program") |
| |
| def detachUe(self, ue_name, pfcp_session_id, ue_address, |
| teid=None, up_id=None, down_id=None, |
| teid_up=None, teid_down=None, |
| pdr_id_up=None, far_id_up=None, ctr_id_up=None, |
| pdr_id_down=None, far_id_down=None, ctr_id_down=None, |
| qfi=None, five_g=False): |
| self.__programUp4Rules(ue_name, |
| pfcp_session_id, |
| ue_address, |
| teid, up_id, down_id, |
| teid_up, teid_down, |
| pdr_id_up, far_id_up, ctr_id_up, |
| pdr_id_down, far_id_down, ctr_id_down, |
| qfi, five_g, action="clear") |
| |
| def __programUp4Rules(self, ue_name, pfcp_session_id, ue_address, |
| teid=None, up_id=None, down_id=None, |
| teid_up=None, teid_down=None, |
| pdr_id_up=None, far_id_up=None, ctr_id_up=None, |
| pdr_id_down=None, far_id_down=None, ctr_id_down=None, |
| qfi=None, five_g=False, action="program"): |
| if up_id is not None: |
| pdr_id_up = up_id |
| far_id_up = up_id |
| ctr_id_up = up_id |
| if down_id is not None: |
| pdr_id_down = down_id |
| far_id_down = down_id |
| ctr_id_down = down_id |
| if teid is not None: |
| teid_up = teid |
| teid_down = teid |
| |
| entries = [] |
| |
| # Retrieve eNobeB address from eNodeB list |
| enb_address = self.__getEnbAddress(ue_name) |
| |
| # ========================# |
| # PDR Entries |
| # ========================# |
| |
| # Uplink |
| tableName = 'PreQosPipe.pdrs' |
| actionName = '' |
| matchFields = {} |
| actionParams = {} |
| if qfi is None: |
| actionName = 'PreQosPipe.set_pdr_attributes' |
| else: |
| actionName = 'PreQosPipe.set_pdr_attributes_qos' |
| if five_g: |
| # TODO: currently QFI_MATCH is unsupported in TNA |
| matchFields['has_qfi'] = TRUE |
| matchFields["qfi"] = str(qfi) |
| actionParams['needs_qfi_push'] = FALSE |
| actionParams['qfi'] = str(qfi) |
| # Match fields |
| matchFields['src_iface'] = IFACE_ACCESS |
| matchFields['ue_addr'] = str(ue_address) |
| matchFields['teid'] = str(teid_up) |
| matchFields['tunnel_ipv4_dst'] = str(self.s1u_address) |
| # Action params |
| actionParams['id'] = str(pdr_id_up) |
| actionParams['fseid'] = str(pfcp_session_id) |
| actionParams['ctr_id'] = str(ctr_id_up) |
| actionParams['far_id'] = str(far_id_up) |
| actionParams['needs_gtpu_decap'] = TRUE |
| if not self.__add_entry(tableName, actionName, matchFields, |
| actionParams, entries, action): |
| return False |
| |
| # Downlink |
| tableName = 'PreQosPipe.pdrs' |
| matchFields = {} |
| actionParams = {} |
| if qfi is None: |
| actionName = 'PreQosPipe.set_pdr_attributes' |
| else: |
| actionName = 'PreQosPipe.set_pdr_attributes_qos' |
| # TODO: currently QFI_PUSH is unsupported in TNA |
| actionParams['needs_qfi_push'] = TRUE if five_g else FALSE |
| actionParams['qfi'] = str(qfi) |
| # Match fields |
| matchFields['src_iface'] = IFACE_CORE |
| matchFields['ue_addr'] = str(ue_address) |
| # Action params |
| actionParams['id'] = str(pdr_id_down) |
| actionParams['fseid'] = str(pfcp_session_id) |
| actionParams['ctr_id'] = str(ctr_id_down) |
| actionParams['far_id'] = str(far_id_down) |
| actionParams['needs_gtpu_decap'] = FALSE |
| if not self.__add_entry(tableName, actionName, matchFields, |
| actionParams, entries, action): |
| return False |
| |
| # ========================# |
| # FAR Entries |
| # ========================# |
| |
| # Uplink |
| tableName = 'PreQosPipe.load_far_attributes' |
| actionName = 'PreQosPipe.load_normal_far_attributes' |
| matchFields = {} |
| actionParams = {} |
| |
| # Match fields |
| matchFields['far_id'] = str(far_id_up) |
| matchFields['session_id'] = str(pfcp_session_id) |
| # Action params |
| actionParams['needs_dropping'] = FALSE |
| actionParams['notify_cp'] = FALSE |
| if not self.__add_entry(tableName, actionName, matchFields, |
| actionParams, entries, action): |
| return False |
| |
| # Downlink |
| tableName = 'PreQosPipe.load_far_attributes' |
| actionName = 'PreQosPipe.load_tunnel_far_attributes' |
| matchFields = {} |
| actionParams = {} |
| |
| # Match fields |
| matchFields['far_id'] = str(far_id_down) |
| matchFields['session_id'] = str(pfcp_session_id) |
| # Action params |
| actionParams['needs_dropping'] = FALSE |
| actionParams['notify_cp'] = FALSE |
| actionParams['needs_buffering'] = FALSE |
| actionParams['tunnel_type'] = TUNNEL_TYPE_GPDU |
| actionParams['src_addr'] = str(self.s1u_address) |
| actionParams['dst_addr'] = str(enb_address) |
| actionParams['teid'] = str(teid_down) |
| actionParams['sport'] = TUNNEL_SPORT |
| if not self.__add_entry(tableName, actionName, matchFields, |
| actionParams, entries, action): |
| return False |
| if action == "program": |
| main.log.info("All entries added successfully.") |
| elif action == "clear": |
| self.__clear_entries(entries) |
| |
| def __add_entry(self, tableName, actionName, matchFields, actionParams, |
| entries, action): |
| if action == "program": |
| self.up4_client.buildP4RtTableEntry( |
| tableName=tableName, actionName=actionName, |
| actionParams=actionParams, matchFields=matchFields) |
| if self.up4_client.pushTableEntry(debug=True) == main.TRUE: |
| main.log.info("*** Entry added.") |
| else: |
| main.log.error("Error during table insertion") |
| self.__clear_entries(entries) |
| return False |
| entries.append({"tableName": tableName, "actionName": actionName, |
| "matchFields": matchFields, |
| "actionParams": actionParams}) |
| return True |
| |
| def __clear_entries(self, entries): |
| for i, entry in enumerate(entries): |
| self.up4_client.buildP4RtTableEntry(**entry) |
| if self.up4_client.deleteTableEntry(debug=True) == main.TRUE: |
| main.log.info( |
| "*** Entry %d of %d deleted." % (i + 1, len(entries))) |
| else: |
| main.log.error("Error during table delete") |
| |
| def __getEnbAddress(self, ue_name): |
| for enb in self.enodebs.values(): |
| if ue_name in enb["ues"]: |
| return enb["enb_address"] |
| main.log.error("Missing eNodeB address!") |
| return "" |
| |
| @staticmethod |
| def buildGtpPacket(host, src_ip_outer, dst_ip_outer, src_ip_inner, |
| dst_ip_inner, src_udp_inner, dst_udp_inner, teid): |
| host.buildEther() |
| host.buildIP(src=src_ip_outer, dst=dst_ip_outer) |
| host.buildUDP(ipVersion=4, dport=GPDU_PORT) |
| # FIXME: With newer scapy TEID becomes teid (required for Scapy 2.4.5) |
| host.buildGTP(gtp_type=0xFF, TEID=teid) |
| host.buildIP(overGtp=True, src=src_ip_inner, dst=dst_ip_inner) |
| host.buildUDP(ipVersion=4, overGtp=True, sport=src_udp_inner, |
| dport=dst_udp_inner) |
| |
| @staticmethod |
| def buildUdpPacket(host, src_ip, dst_ip, src_udp, dst_udp, src_eth=None, |
| dst_eth=None): |
| host.buildEther(src=src_eth, dst=dst_eth) |
| host.buildIP(src=src_ip, dst=dst_ip) |
| host.buildUDP(ipVersion=4, sport=src_udp, dport=dst_udp) |
| |
| @staticmethod |
| def checkFilterAndGetPackets(host): |
| finished = host.checkFilter() |
| if finished: |
| packets = host.readPackets(detailed=True) |
| for p in packets.splitlines(): |
| main.log.debug(p) |
| # We care only of the last line from readPackets |
| return packets.splitlines()[-1] |
| else: |
| kill = host.killFilter() |
| main.log.debug(kill) |
| return "" |