diff options
Diffstat (limited to 'tools/pkt_gen/trex')
| -rw-r--r-- | tools/pkt_gen/trex/trex.py | 110 |
1 files changed, 84 insertions, 26 deletions
diff --git a/tools/pkt_gen/trex/trex.py b/tools/pkt_gen/trex/trex.py index e0ce4c48..0a3de3c2 100644 --- a/tools/pkt_gen/trex/trex.py +++ b/tools/pkt_gen/trex/trex.py @@ -15,12 +15,14 @@ """ Trex Traffic Generator Model """ + # pylint: disable=undefined-variable import logging import subprocess import sys import time import os +import re from collections import OrderedDict # pylint: disable=unused-import import netaddr @@ -69,6 +71,20 @@ _EMPTY_STATS = { 'tx_pps': 0.0, 'tx_util': 0.0,}} +# Default frame definition, which can be overridden by TRAFFIC['scapy']. +# The content of the frame and its network layers are driven by TRAFFIC +# dictionary, i.e. 'l2', 'l3, 'l4' and 'vlan' parts. +_SCAPY_FRAME = { + '0' : 'Ether(src={Ether_src}, dst={Ether_dst})/' + 'Dot1Q(prio={Dot1Q_prio}, id={Dot1Q_id}, vlan={Dot1Q_vlan})/' + 'IP(proto={IP_proto}, src={IP_src}, dst={IP_dst})/' + '{IP_PROTO}(sport={IP_PROTO_sport}, dport={IP_PROTO_dport})', + '1' : 'Ether(src={Ether_dst}, dst={Ether_src})/' + 'Dot1Q(prio={Dot1Q_prio}, id={Dot1Q_id}, vlan={Dot1Q_vlan})/' + 'IP(proto={IP_proto}, src={IP_dst}, dst={IP_src})/' + '{IP_PROTO}(sport={IP_PROTO_dport}, dport={IP_PROTO_sport})', +} + class Trex(ITrafficGenerator): """Trex Traffic generator wrapper.""" @@ -165,35 +181,77 @@ class Trex(ITrafficGenerator): self._logger.info("T-Rex: In trex disconnect method") self._stlclient.disconnect(stop_traffic=True, release_ports=True) - @staticmethod - def create_packets(traffic, ports_info): + def create_packets(self, traffic, ports_info): """Create base packet according to traffic specification. If traffic haven't specified srcmac and dstmac fields - packet will be create with mac address of trex server. + packet will be created with mac address of trex server. """ - mac_add = [li['hw_mac'] for li in ports_info] - - if traffic and traffic['l2']['framesize'] > 0: - if traffic['l2']['dstmac'] == '00:00:00:00:00:00' and \ - traffic['l2']['srcmac'] == '00:00:00:00:00:00': - base_pkt_a = Ether(src=mac_add[0], dst=mac_add[1])/ \ - IP(proto=traffic['l3']['proto'], src=traffic['l3']['srcip'], - dst=traffic['l3']['dstip'])/ \ - UDP(dport=traffic['l4']['dstport'], sport=traffic['l4']['srcport']) - base_pkt_b = Ether(src=mac_add[1], dst=mac_add[0])/ \ - IP(proto=traffic['l3']['proto'], src=traffic['l3']['dstip'], - dst=traffic['l3']['srcip'])/ \ - UDP(dport=traffic['l4']['srcport'], sport=traffic['l4']['dstport']) - else: - base_pkt_a = Ether(src=traffic['l2']['srcmac'], dst=traffic['l2']['dstmac'])/ \ - IP(proto=traffic['l3']['proto'], src=traffic['l3']['dstip'], - dst=traffic['l3']['srcip'])/ \ - UDP(dport=traffic['l4']['dstport'], sport=traffic['l4']['srcport']) + if not traffic or traffic['l2']['framesize'] <= 0: + return (None, None) - base_pkt_b = Ether(src=traffic['l2']['dstmac'], dst=traffic['l2']['srcmac'])/ \ - IP(proto=traffic['l3']['proto'], src=traffic['l3']['dstip'], - dst=traffic['l3']['srcip'])/ \ - UDP(dport=traffic['l4']['srcport'], sport=traffic['l4']['dstport']) + if traffic['l2']['dstmac'] == '00:00:00:00:00:00' and \ + traffic['l2']['srcmac'] == '00:00:00:00:00:00': + + mac_add = [li['hw_mac'] for li in ports_info] + src_mac = mac_add[0] + dst_mac = mac_add[1] + else: + src_mac = traffic['l2']['srcmac'] + dst_mac = traffic['l2']['dstmac'] + + if traffic['scapy']['enabled']: + base_pkt_a = traffic['scapy']['0'] + base_pkt_b = traffic['scapy']['1'] + else: + base_pkt_a = _SCAPY_FRAME['0'] + base_pkt_b = _SCAPY_FRAME['1'] + + # check and remove network layers disabled by TRAFFIC dictionary + # Note: In general, it is possible to remove layers from scapy object by + # e.g. del base_pkt_a['IP']. However it doesn't work for all layers + # (e.g. Dot1Q). Thus it is safer to modify string with scapy frame definition + # directly, before it is converted to the real scapy object. + if not traffic['vlan']['enabled']: + self._logger.info('VLAN headers are disabled by TRAFFIC') + base_pkt_a = re.sub(r'(^|\/)Dot1Q?\([^\)]*\)', '', base_pkt_a) + base_pkt_b = re.sub(r'(^|\/)Dot1Q?\([^\)]*\)', '', base_pkt_b) + if not traffic['l3']['enabled']: + self._logger.info('IP headers are disabled by TRAFFIC') + base_pkt_a = re.sub(r'(^|\/)IP(v6)?\([^\)]*\)', '', base_pkt_a) + base_pkt_b = re.sub(r'(^|\/)IP(v6)?\([^\)]*\)', '', base_pkt_b) + if not traffic['l4']['enabled']: + self._logger.info('%s headers are disabled by TRAFFIC', + traffic['l3']['proto'].upper()) + base_pkt_a = re.sub(r'(^|\/)(UDP|TCP|SCTP|{{IP_PROTO}}|{})\([^\)]*\)'.format( + traffic['l3']['proto'].upper()), '', base_pkt_a) + base_pkt_b = re.sub(r'(^|\/)(UDP|TCP|SCTP|{{IP_PROTO}}|{})\([^\)]*\)'.format( + traffic['l3']['proto'].upper()), '', base_pkt_b) + + # pylint: disable=eval-used + base_pkt_a = eval(base_pkt_a.format( + Ether_src=repr(src_mac), + Ether_dst=repr(dst_mac), + Dot1Q_prio=traffic['vlan']['priority'], + Dot1Q_id=traffic['vlan']['cfi'], + Dot1Q_vlan=traffic['vlan']['id'], + IP_proto=repr(traffic['l3']['proto']), + IP_PROTO=traffic['l3']['proto'].upper(), + IP_src=repr(traffic['l3']['srcip']), + IP_dst=repr(traffic['l3']['dstip']), + IP_PROTO_sport=traffic['l4']['srcport'], + IP_PROTO_dport=traffic['l4']['dstport'])) + base_pkt_b = eval(base_pkt_b.format( + Ether_src=repr(src_mac), + Ether_dst=repr(dst_mac), + Dot1Q_prio=traffic['vlan']['priority'], + Dot1Q_id=traffic['vlan']['cfi'], + Dot1Q_vlan=traffic['vlan']['id'], + IP_proto=repr(traffic['l3']['proto']), + IP_PROTO=traffic['l3']['proto'].upper(), + IP_src=repr(traffic['l3']['srcip']), + IP_dst=repr(traffic['l3']['dstip']), + IP_PROTO_sport=traffic['l4']['srcport'], + IP_PROTO_dport=traffic['l4']['dstport'])) return (base_pkt_a, base_pkt_b) @@ -299,7 +357,7 @@ class Trex(ITrafficGenerator): if settings.getValue('TRAFFICGEN_TREX_PROMISCUOUS'): self._stlclient.set_port_attr(my_ports, promiscuous=True) - packet_1, packet_2 = Trex.create_packets(traffic, ports_info) + packet_1, packet_2 = self.create_packets(traffic, ports_info) self.show_packet_info(packet_1, packet_2) stream_1, stream_2, stream_1_lat, stream_2_lat = Trex.create_streams(packet_1, packet_2, traffic) self._stlclient.add_streams(stream_1, ports=[0]) |