diff options
Diffstat (limited to 'resources')
| -rw-r--r-- | resources/libraries/python/Classify.py | 38 | ||||
| -rw-r--r-- | resources/libraries/python/IPFIXSetup.py | 129 | ||||
| -rw-r--r-- | resources/libraries/python/IPFIXUtil.py | 102 | ||||
| -rw-r--r-- | resources/libraries/python/PacketVerifier.py | 22 | ||||
| -rw-r--r-- | resources/libraries/robot/ipfix.robot | 67 | ||||
| -rw-r--r-- | resources/templates/vat/classify_add_session_generic.vat | 1 | ||||
| -rw-r--r-- | resources/templates/vat/ipfix_exporter_set.vat | 1 | ||||
| -rw-r--r-- | resources/templates/vat/ipfix_interface_enable.vat | 1 | ||||
| -rw-r--r-- | resources/templates/vat/ipfix_stream_set.vat | 1 | ||||
| -rw-r--r-- | resources/templates/vat/ipfix_table_add.vat | 1 | ||||
| -rwxr-xr-x | resources/traffic_scripts/ipfix_check.py | 198 |
11 files changed, 553 insertions, 8 deletions
diff --git a/resources/libraries/python/Classify.py b/resources/libraries/python/Classify.py index dfa5c3377d..8dbe3fb25f 100644 --- a/resources/libraries/python/Classify.py +++ b/resources/libraries/python/Classify.py @@ -37,6 +37,7 @@ class Classify(object): :rtype: tuple(int, int, int) :raises RuntimeError: If VPP can't create table. """ + output = VatExecutor.cmd_from_template(node, "classify_add_table.vat", ip_version=ip_version, direction=direction) @@ -205,6 +206,43 @@ class Classify(object): hex_value=hex_value) @staticmethod + def vpp_configures_classify_session_generic(node, session_type, table_index, + skip_n, match_n, match, + match2=''): + """Configuration of classify session. + + :param node: VPP node to setup classify session. + :param session_type: Session type - hit-next, l2-hit-next, acl-hit-next + or policer-hit-next, and their respective parameters. + :param table_index: Classify table index. + :param skip_n: Number of skip vectors based on mask. + :param match_n: Number of match vectors based on mask. + :param match: Match value - l2, l3, l4 or hex, and their + respective parameters. + :param match2: Additional match values, to avoid using overly long + variables in RobotFramework. + :type node: dict + :type session_type: str + :type table_index: int + :type skip_n: int + :type match_n: int + :type match: str + :type match2: str + """ + + match = ' '.join((match, match2)) + + with VatTerminal(node) as vat: + vat.vat_terminal_exec_cmd_from_template( + "classify_add_session_generic.vat", + type=session_type, + table_index=table_index, + skip_n=skip_n, + match_n=match_n, + match=match, + ) + + @staticmethod def compute_classify_hex_mask(ip_version, protocol, direction): """Compute classify hex mask for TCP or UDP packet matching. diff --git a/resources/libraries/python/IPFIXSetup.py b/resources/libraries/python/IPFIXSetup.py new file mode 100644 index 0000000000..f0f35f3bc6 --- /dev/null +++ b/resources/libraries/python/IPFIXSetup.py @@ -0,0 +1,129 @@ +# Copyright (c) 2016 Cisco 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. + +"""IPFIX setup library""" + +from resources.libraries.python.topology import Topology +from resources.libraries.python.VatExecutor import VatTerminal + + +class IPFIXSetup(object): + """Class contains methods for seting up IPFIX reporting on DUTs.""" + + def __init__(self): + """Initializer.""" + pass + + @staticmethod + def setup_ipfix_exporter(node, collector, source, fib=None, mtu=None, + interval=None): + """Setup an IPFIX exporter on node to export collected flow data. + + :param node: DUT node. + :param collector: IP address of flow data collector. + :param source: IP address of local interface to send flow data from. + :param fib: fib table ID. + :param mtu: Maximum transfer unit of path to collector. + :param interval: Frequency of sending template packets, in seconds. + :type node: dict + :type collector: str + :type source: str + :type fib: int + :type mtu: int + :type interval: int + """ + + fib = "vrf_id {0}".format(fib) if fib else '' + mtu = "path_mtu {0}".format(mtu) if mtu else '' + interval = "template_interval {0}".format(interval) if interval else '' + + with VatTerminal(node, json_param=False) as vat: + vat.vat_terminal_exec_cmd_from_template('ipfix_exporter_set.vat', + collector=collector, + source=source, + fib=fib, + mtu=mtu, + interval=interval) + + @staticmethod + def assign_interface_to_flow_table(node, interface, table_id, + ip_version='ip4'): + """Assigns a VPP interface to the specified classify table for IPFIX + flow data collection. + + :param node: DUT node. + :param interface: An interface on the DUT node. + :param table_id: ID of a classify table. + :param ip_version: Version of IP protocol. Valid options are ip4, ip6. + :type node: dict + :type interface: str or int + :type table_id: int + :type ip_version: str + """ + + if isinstance(interface, basestring): + sw_if_index = Topology.get_interface_sw_index(node, interface) + elif isinstance(interface, int): + sw_if_index = interface + else: + raise TypeError + + table = "{0}-table {1}".format(ip_version, table_id) + + with VatTerminal(node, json_param=False) as vat: + vat.vat_terminal_exec_cmd_from_template( + "ipfix_interface_enable.vat", + interface=sw_if_index, + table=table, + delete='') + + @staticmethod + def set_ipfix_stream(node, domain=None, src_port=None): + """Set an IPFIX export stream. Can be used to break up IPFIX reports + into separate reporting domains. + + :param node: DUT node. + :param domain: Desired index number of exporting domain. + :param src_port: Source port to use when sending IPFIX packets. Default + is the standard IPFIX port 4739. + :type node: dict + :type domain: int + :type src_port: int + """ + + domain = "domain {0}".format(domain) if domain else '' + src_port = "src_port {0}".format(src_port) if src_port else '' + + with VatTerminal(node, json_param=False) as vat: + vat.vat_terminal_exec_cmd_from_template("ipfix_stream_set.vat", + domain=domain, + src_port=src_port) + + @staticmethod + def assign_classify_table_to_exporter(node, table_id, ip_version='ip4'): + """Assign a classify table to an IPFIX exporter. Classified packets will + be included in the IPFIX flow report. + + :param node: DUT node. + :param table_id: ID of a classify table. + :param ip_version: Version of IP protocol. Valid options are ip4, ip6. + :type node: dict + :type table_id: int + :type ip_version: str + """ + + with VatTerminal(node, json_param=False) as vat: + vat.vat_terminal_exec_cmd_from_template("ipfix_table_add.vat", + table=table_id, + ip_version=ip_version, + add_del='add') diff --git a/resources/libraries/python/IPFIXUtil.py b/resources/libraries/python/IPFIXUtil.py new file mode 100644 index 0000000000..f3247a8982 --- /dev/null +++ b/resources/libraries/python/IPFIXUtil.py @@ -0,0 +1,102 @@ +# Copyright (c) 2016 Cisco 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. + +"""IPFIX utilities library. Provides classes that allow scapy to work +with IPFIX packets. + + Note: + Template and data sets in one packet are not supported. + Option template sets (Set_ID = 3) are not supported. + """ + + +from scapy.all import Packet, bind_layers +from scapy.fields import * +from scapy.layers.inet import UDP +from scapy.contrib.ppi_geotag import UTCTimeField + + +class IPFIXHandler(object): + """Class for handling IPFIX packets. To use, create instance of class before + dissecting IPFIX packets with scapy, then run update_template every time + an IPFIX template packet is received.""" + + template_elements = { + 4: ByteField("Protocol_ID", 0x00), + 7: ShortField("src_port", 0), + 8: IPField("IPv4_src", ""), + 11: ShortField("dst_port", 0), + 12: IPField("IPv4_dst", ""), + 86: LongField("packetTotalCount", 0), + 180: ShortField("udp_src_port", 0), + 181: ShortField("udp_dst_port", 0), + 182: ShortField("tcp_src_port", 0), + 183: ShortField("tcp_dst_port", 0), + } + + def __init__(self): + """Initializer, registers IPFIX header and template layers with scapy. + """ + bind_layers(UDP, IPFIXHeader, dport=4739) + bind_layers(IPFIXHeader, IPFIXTemplate, Set_ID=2) + + def update_template(self, packet): + """Updates IPFIXData class with new data template. Registers IPFIX data + layer with scapy using the new template. + + :param packet: Packet containing an IPFIX template. + :type packet: scapy.Ether + """ + template_list = packet['IPFIX template'].Template + template_id = packet['IPFIX template'].Template_ID + + IPFIXData.fields_desc = [] + for item in template_list[::2]: + try: + IPFIXData.fields_desc.append(self.template_elements[item]) + except KeyError: + raise KeyError( + "Unknown IPFIX template element with ID {0}".format(item)) + bind_layers(IPFIXHeader, IPFIXData, Set_ID=template_id) + # if the packet doesn't end here, assume it contains more data sets + bind_layers(IPFIXData, IPFIXData) + + +class IPFIXHeader(Packet): + """Class for IPFIX header.""" + name = "IPFIX header" + fields_desc = [StrFixedLenField("Version", 0x000a, length=2), + ShortField("Message Length", 0), + UTCTimeField("Timestamp(UTC)", ""), + IntField("Sequence Number", 0), + IntField("Observation Domain ID", 0), + ShortField("Set_ID", 0), + ShortField("Set_Length", 0) + ] + + +class IPFIXTemplate(Packet): + """Class for IPFIX template layer.""" + name = "IPFIX template" + fields_desc = [ShortField("Template_ID", 256), + ShortField("nFields", 2), + FieldListField("Template", [], ShortField("type_len", ""), + count_from=lambda p: p.nFields*2) + ] + + +class IPFIXData(Packet): + """Class for IPFIX data layer. Needs to be updated with + a template before use.""" + name = "IPFIX flow data" + fields_desc = [] diff --git a/resources/libraries/python/PacketVerifier.py b/resources/libraries/python/PacketVerifier.py index 78c3670135..59ea2db5a3 100644 --- a/resources/libraries/python/PacketVerifier.py +++ b/resources/libraries/python/PacketVerifier.py @@ -204,7 +204,7 @@ class RxQueue(PacketVerifier): def __init__(self, interface_name): PacketVerifier.__init__(self, interface_name) - def recv(self, timeout=3, ignore=None): + def recv(self, timeout=3, ignore=None, verbose=True): """Read next received packet. Returns scapy's Ether() object created from next packet in the queue. @@ -212,9 +212,11 @@ class RxQueue(PacketVerifier): arrives in given timeout queue.Empty exception will be risen. :param timeout: How many seconds to wait for next packet. - :param ignore: Packet list that should be ignored. + :param ignore: List of packets that should be ignored. + :param verbose: Used to suppress detailed logging of received packets. :type timeout: int :type ignore: list + :type verbose: bool :return: Ether() initialized object from packet data. :rtype: scapy.Ether @@ -226,8 +228,9 @@ class RxQueue(PacketVerifier): pkt = self._sock.recv(0x7fff) pkt_pad = auto_pad(pkt) print 'Received packet on {0} of len {1}'.format(self._ifname, len(pkt)) - Ether(pkt).show2() - print + if verbose: + Ether(pkt).show2() + print if ignore is not None: for i, ig_pkt in enumerate(ignore): @@ -238,7 +241,7 @@ class RxQueue(PacketVerifier): # Found the packet in ignore list, get another one # TODO: subtract timeout - time_spent in here ignore.remove(ig_pkt) - return self.recv(timeout, ignore) + return self.recv(timeout, ignore, verbose) return Ether(pkt) @@ -254,16 +257,19 @@ class TxQueue(PacketVerifier): def __init__(self, interface_name): PacketVerifier.__init__(self, interface_name) - def send(self, pkt): + def send(self, pkt, verbose=True): """Send packet out of the bound interface. :param pkt: Packet to send. + :param verbose: Used to supress detailed logging of sent packets. :type pkt: string or scapy Packet derivative. + :type verbose: bool """ print 'Sending packet out of {0} of len {1}'.format(self._ifname, len(pkt)) - Ether(str(pkt)).show2() - print + if verbose: + Ether(str(pkt)).show2() + print pkt = auto_pad(str(pkt)) self._sock.send(pkt) diff --git a/resources/libraries/robot/ipfix.robot b/resources/libraries/robot/ipfix.robot new file mode 100644 index 0000000000..a5adacfc0f --- /dev/null +++ b/resources/libraries/robot/ipfix.robot @@ -0,0 +1,67 @@ +# Copyright (c) 2016 Cisco 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. + +"""Traffic keywords""" + +*** Settings *** +| Library | resources.libraries.python.TrafficScriptExecutor +| Library | resources.libraries.python.InterfaceUtil +| Resource | resources/libraries/robot/default.robot +| Documentation | Traffic keywords + +*** Keywords *** +| Send packets and verify IPFIX +| | [Documentation] | Send simple TCP or UDP packets from source interface\ +| | ... | to destination interface. Listen for IPFIX flow report on source\ +| | ... | interface and verify received report against number of packets sent. +| | ... +| | ... | *Arguments:* +| | ... +| | ... | - tg_node - TG node. Type: dictionary +| | ... | - dst_node - Destination node. Type: dictionary +| | ... | - src_int - Source interface. Type: string +| | ... | - dst_int - Destination interface. Type: string +| | ... | - src_ip - Source IP address. Type: string +| | ... | - dst_ip - Destination IP address. Type: string +| | ... | - protocol - TCP or UDP (Optional, default is TCP). Type: string +| | ... | - port - Source and destination ports to use +| | ... | (Optional, default is port 20). Type: integer +| | ... | - count - Number of packets to send +| | ... | (Optional, default is one packet). Type: integer +| | ... | - timeout - Timeout value in seconds (Optional, default is 10 sec). +| | ... | Should be at least twice the configured IPFIX flow report interval. +| | ... | Type: integer +| | ... +| | ... | *Return:* +| | ... +| | ... | - No value returned +| | ... +| | ... | *Example:* +| | ... +| | ... | \| Send packets and verify IPFIX \| ${nodes['TG']} | ${nodes['DUT1']}\ +| | ... | \| eth1 \| GigabitEthernet0/8/0 \| 16.0.0.1 \| 192.168.0.2 \| UDP \ +| | ... | \| ${20} \| ${5} \| ${10} \| +| | ... | +| | [Arguments] | ${tg_node} | ${dst_node} | ${src_int} | ${dst_int} | +| | ... | ${src_ip} | ${dst_ip} | ${protocol}=tcp | ${port}=20 | ${count}=1 +| | ... | ${timeout}=${10} +| | ${src_mac}= | Get Interface Mac | ${tg_node} | ${src_int} +| | ${dst_mac}= | Get Interface Mac | ${dst_node} | ${dst_int} +| | ${src_int_name}= | Get interface name | ${tg_node} | ${src_int} +| | ${dst_int_name}= | Get interface name | ${dst_node} | ${dst_int} +| | ${args}= | Traffic Script Gen Arg | ${dst_int_name} | ${src_int_name} +| | ... | ${src_mac} | ${dst_mac} | ${src_ip} | ${dst_ip} +| | ${args}= | Set Variable +| | ... | ${args} --protocol ${protocol} --port ${port} --count ${count} +| | Run Traffic Script On Node | ipfix_check.py | ${tg_node} | ${args} +| | ... | ${timeout} diff --git a/resources/templates/vat/classify_add_session_generic.vat b/resources/templates/vat/classify_add_session_generic.vat new file mode 100644 index 0000000000..b100629c4e --- /dev/null +++ b/resources/templates/vat/classify_add_session_generic.vat @@ -0,0 +1 @@ +classify_add_del_session {type} table-index {table_index} skip_n {skip_n} match_n {match_n} match {match}
\ No newline at end of file diff --git a/resources/templates/vat/ipfix_exporter_set.vat b/resources/templates/vat/ipfix_exporter_set.vat new file mode 100644 index 0000000000..9217375e01 --- /dev/null +++ b/resources/templates/vat/ipfix_exporter_set.vat @@ -0,0 +1 @@ +set_ipfix_exporter collector_address {collector} src_address {source} {fib} {mtu} {interval}
\ No newline at end of file diff --git a/resources/templates/vat/ipfix_interface_enable.vat b/resources/templates/vat/ipfix_interface_enable.vat new file mode 100644 index 0000000000..5432a6916a --- /dev/null +++ b/resources/templates/vat/ipfix_interface_enable.vat @@ -0,0 +1 @@ +flow_classify_set_interface sw_if_index {interface} {table} {delete}
\ No newline at end of file diff --git a/resources/templates/vat/ipfix_stream_set.vat b/resources/templates/vat/ipfix_stream_set.vat new file mode 100644 index 0000000000..97d84beb1c --- /dev/null +++ b/resources/templates/vat/ipfix_stream_set.vat @@ -0,0 +1 @@ +set_ipfix_classify_stream {domain} {src_port}
\ No newline at end of file diff --git a/resources/templates/vat/ipfix_table_add.vat b/resources/templates/vat/ipfix_table_add.vat new file mode 100644 index 0000000000..87b0cc169d --- /dev/null +++ b/resources/templates/vat/ipfix_table_add.vat @@ -0,0 +1 @@ +ipfix_classify_table_add_del table {table} {ip_version} {add_del}
\ No newline at end of file diff --git a/resources/traffic_scripts/ipfix_check.py b/resources/traffic_scripts/ipfix_check.py new file mode 100755 index 0000000000..14b5a074db --- /dev/null +++ b/resources/traffic_scripts/ipfix_check.py @@ -0,0 +1,198 @@ +#!/usr/bin/env python + +# Copyright (c) 2016 Cisco 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. + +"""Traffic script - IPFIX listener.""" + +import sys +from ipaddress import IPv4Address, IPv6Address, AddressValueError + +from scapy.layers.inet import IP, TCP, UDP +from scapy.layers.inet6 import IPv6 +from scapy.layers.l2 import Ether + +from resources.libraries.python.IPFIXUtil import IPFIXHandler, IPFIXData +from resources.libraries.python.PacketVerifier import RxQueue, TxQueue, auto_pad +from resources.libraries.python.TrafficScriptArg import TrafficScriptArg + + +def valid_ipv4(ip): + """Check if IP address has the correct IPv4 address format. + + :param ip: IP address. + :type ip: str + :return: True in case of correct IPv4 address format, + otherwise return false. + :rtype: bool + """ + try: + IPv4Address(unicode(ip)) + return True + except (AttributeError, AddressValueError): + return False + + +def valid_ipv6(ip): + """Check if IP address has the correct IPv6 address format. + + :param ip: IP address. + :type ip: str + :return: True in case of correct IPv6 address format, + otherwise return false. + :rtype: bool + """ + try: + IPv6Address(unicode(ip)) + return True + except (AttributeError, AddressValueError): + return False + + +def main(): + """Send packets to VPP, then listen for IPFIX flow report. Verify that + the correct packet count was reported.""" + args = TrafficScriptArg( + ['src_mac', 'dst_mac', 'src_ip', 'dst_ip', 'protocol', 'port', 'count'] + ) + + dst_mac = args.get_arg('dst_mac') + src_mac = args.get_arg('src_mac') + src_ip = args.get_arg('src_ip') + dst_ip = args.get_arg('dst_ip') + tx_if = args.get_arg('tx_if') + + protocol = args.get_arg('protocol') + source_port = int(args.get_arg('port')) + destination_port = int(args.get_arg('port')) + count = int(args.get_arg('count')) + + txq = TxQueue(tx_if) + rxq = RxQueue(tx_if) + + # generate simple packet based on arguments + ip_version = None + if valid_ipv4(src_ip) and valid_ipv4(dst_ip): + ip_version = IP + elif valid_ipv6(src_ip) and valid_ipv6(dst_ip): + ip_version = IPv6 + else: + raise ValueError("Invalid IP version!") + + if protocol.upper() == 'TCP': + protocol = TCP + elif protocol.upper() == 'UDP': + protocol = UDP + else: + raise ValueError("Invalid type of protocol!") + + pkt_raw = (Ether(src=src_mac, dst=dst_mac) / + ip_version(src=src_ip, dst=dst_ip) / + protocol(sport=int(source_port), + dport=int(destination_port))) + + # do not print details for sent packets when sending more than one + if count > 1: + verbose = False + print("Sending more than one packet. Details will be filtered for " + "all packets sent.") + else: + verbose = True + + pkt_pad = auto_pad(pkt_raw) + ignore = [] + for _ in range(count): + txq.send(pkt_pad, verbose=verbose) + ignore.append(pkt_pad) + + # allow scapy to recognize IPFIX headers and templates + ipfix = IPFIXHandler() + + # clear receive buffer + while True: + pkt = rxq.recv(1, ignore=ignore, verbose=verbose) + if pkt is None: + break + + data = None + # get IPFIX template and data + while True: + pkt = rxq.recv(5) + if pkt is None: + raise RuntimeError("RX timeout") + if pkt.haslayer("IPFIXHeader"): + if pkt.haslayer("IPFIXTemplate"): + # create or update template for IPFIX data packets + ipfix.update_template(pkt) + elif pkt.haslayer("IPFIXData"): + data = pkt.getlayer(IPFIXData).fields + break + else: + raise RuntimeError("Unable to parse IPFIX set after header.") + else: + raise RuntimeError("Received non-IPFIX packet or IPFIX header " + "not recognized.") + + # verify packet count + if data["packetTotalCount"] != count: + raise RuntimeError( + "IPFIX reported wrong packet count. Count was {0}," + " but should be {1}".format(data["packetTotalCount"], count)) + # verify IP addresses + keys = data.keys() + err = "{0} mismatch. Packets used {1}, but were classified as {2}." + if ip_version == IP: + if "IPv4_src" in keys: + if data["IPv4_src"] != src_ip: + raise RuntimeError( + err.format("Source IP", src_ip, data["IPv4_src"])) + if "IPv4_dst" in keys: + if data["IPv4_dst"] != dst_ip: + raise RuntimeError( + err.format("Destination IP", dst_ip, data["IPv4_dst"])) + else: + if "IPv6_src" in keys: + if data["IPv6_src"] != src_ip: + raise RuntimeError( + err.format("Source IP", src_ip, data["IPv6_src"])) + if "IPv6_dst" in keys: + if data["IPv6_dst"] != dst_ip: + raise RuntimeError( + err.format("Source IP", src_ip, data["IPv6_dst"])) + # verify port numbers + for item in ("src_port", "tcp_src_port", "udp_src_port"): + try: + if int(data[item]) != source_port: + raise RuntimeError( + err.format("Source port", source_port, data[item])) + except KeyError: + pass + for item in ("dst_port", "tcp_dst_port", "udp_dst_port"): + try: + if int(data[item]) != destination_port: + raise RuntimeError( + err.format("Source port", destination_port, data[item])) + except KeyError: + pass + # verify protocol ID + if "Protocol_ID" in keys: + if protocol == TCP and int(data["Protocol_ID"]) != 6: + raise RuntimeError("TCP Packets were classified as not TCP.") + if protocol == UDP and int(data["Protocol_ID"]) != 17: + raise RuntimeError("UDP Packets were classified as not UDP.") + sys.exit(0) + + +if __name__ == "__main__": + + main() |