def runTest(self):
target = gc.Target(device_id=0, pipe_id=0xffff)
# Get bfrt_info and set it as part of the test
bfrt_info = self.interface.bfrt_info_get(p4_program_name)
# Set default output port
table_output_port = bfrt_info.table_get("SwitchIngress.output_port")
action_data = table_output_port.make_data(
action_name="SwitchIngress.set_output_port",
data_field_list_in=[gc.DataTuple(name="port_id", val=swports[1])])
table_output_port.default_entry_set(target=target, data=action_data)
# Set a default entry in the rewrite table so all packets get
# their checksum updated.
table_translate = bfrt_info.table_get("SwitchIngress.translate")
action_data = table_translate.make_data(
action_name="SwitchIngress.snupat",
data_field_list_in=[
gc.DataTuple(name="src_addr", val=gc.ipv4_to_bytes("4.3.2.1")),
gc.DataTuple(name="src_port", val=gc.to_bytes(0x4321, 2)),
gc.DataTuple(name="update", val=0x0)
],
)
table_translate.default_entry_set(target=target, data=action_data)
try:
ipkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='1.2.3.4',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x1234,
udp_dport=0xabcd,
with_udp_chksum=True)
epkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='4.3.2.1',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x4321,
udp_dport=0xabcd,
with_udp_chksum=False)
# We expect the packet to have the same TCP checksum as the packet
# we sent in. Calling str forces scapy to calculate the checksum
# for the given layer.
epkt[scapy.all.IP].chksum = ipkt[scapy.all.IP].__class__(
str(ipkt[scapy.all.IP])).chksum
epkt[scapy.all.UDP].chksum = ipkt[scapy.all.UDP].__class__(
str(ipkt[scapy.all.UDP])).chksum
testutils.send_packet(self, swports[0], ipkt)
testutils.verify_packet(self, epkt, swports[1])
finally:
table_output_port.default_entry_reset(target)
table_translate.default_entry_reset(target)
def runTest(self):
target = gc.Target(device_id=0, pipe_id=0xffff)
# Get bfrt_info and set it as part of the test
bfrt_info = self.interface.bfrt_info_get(p4_program_name)
# Set default output port
table_output_port = bfrt_info.table_get("SwitchIngress.output_port")
action_data = table_output_port.make_data(
action_name="SwitchIngress.set_output_port",
data_field_list_in=[gc.DataTuple(name="port_id", val=swports[1])])
table_output_port.default_entry_set(target=target, data=action_data)
# Set a default entry in the rewrite table so all packets get
# their checksum updated.
table_translate = bfrt_info.table_get("SwitchIngress.translate")
action_data = table_translate.make_data(
action_name="SwitchIngress.sntpat",
data_field_list_in=[
gc.DataTuple(name="src_addr", val=gc.ipv4_to_bytes("4.3.2.1")),
gc.DataTuple(name="src_port", val=gc.to_bytes(0x4321, 2)),
gc.DataTuple(name="update", val=0x1)
],
)
table_translate.default_entry_set(target=target, data=action_data)
try:
ipkt = testutils.simple_tcp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='1.2.3.4',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
tcp_sport=0x1234,
tcp_dport=0xabcd,
with_tcp_chksum=True)
epkt = testutils.simple_tcp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='4.3.2.1',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
tcp_sport=0x4321,
tcp_dport=0xabcd,
with_tcp_chksum=True)
testutils.send_packet(self, swports[0], ipkt)
testutils.verify_packet(self, epkt, swports[1])
finally:
table_output_port.default_entry_reset(target)
table_translate.default_entry_reset(target)
def runTest(self):
target = gc.Target(device_id=0, pipe_id=0xffff)
# Get bfrt_info and set it as part of the test
bfrt_info = self.interface.bfrt_info_get(p4_program_name)
# Set default output port
table_output_port = bfrt_info.table_get("SwitchIngress.output_port")
action_data = table_output_port.make_data(
action_name="SwitchIngress.set_output_port",
data_field_list_in=[gc.DataTuple(name="port_id", val=swports[1])])
table_output_port.default_entry_set(target=target, data=action_data)
# Set a default entry in the rewrite table so all packets get
# their checksum updated.
table_translate = bfrt_info.table_get("SwitchIngress.translate")
action_data = table_translate.make_data(
action_name="SwitchIngress.snupat",
data_field_list_in=[
gc.DataTuple(name="src_addr", val=gc.ipv4_to_bytes("4.3.2.1")),
gc.DataTuple(name="src_port", val=gc.to_bytes(0x4321, 2)),
gc.DataTuple(name="update", val=0x1)
],
)
table_translate.default_entry_set(target=target, data=action_data)
try:
# Test special cases
# The UDP checksum value 0x0000 denotes the absence of the optional
# checksum. Therefore, if the actual checksum value is 0x0000, the
# checksum value is flipped to be 0xffff.
# Find payload value for UDP checksum 0xffff before translation
# Uncomment if to find new payload value when the input values have
# changed.
# for i in range(2**16):
# tpkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
# eth_src='00:00:00:00:00:00',
# ip_src='1.2.3.4',
# ip_dst='100.99.98.97',
# ip_id=101,
# ip_ttl=64,
# udp_sport=0x1234,
# udp_dport=0xabcd,
# udp_payload = struct.pack("!I", i),
# with_udp_chksum = True)
# # Force checksum calculation
# checksum = tpkt[scapy.all.UDP].__class__(str(tpkt[scapy.all.UDP])).chksum
# print("Packet: {}, payload: {}, checksum: {}".format(hash(tpkt),
# hex(i),
# hex(checksum)))
# if hex(checksum) == '0xffff':
# print("Found payload with hash value 0xffff: {}".format(i))
# break
# Payload for UDP checksum 0xffff: 46530, actual UDP csum value: 0x0
# Find payload value for UDP checksum 0xffff after translation
# Uncomment if to find new payload value when the input values have
# changed.
# for i in range(2**16):
# tpkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
# eth_src='00:00:00:00:00:00',
# ip_src='4.3.2.1',
# ip_dst='100.99.98.97',
# ip_id=101,
# ip_ttl=64,
# udp_sport=0x4321,
# udp_dport=0xabcd,
# udp_payload = struct.pack("!I", i),
# with_udp_chksum = True)
# # Force checksum calculation
# checksum = tpkt[scapy.all.UDP].__class__(str(tpkt[scapy.all.UDP])).chksum
# print("Packet: {}, payload: {}, checksum: {}".format(hash(tpkt),
# hex(i),
# hex(checksum)))
# if hex(checksum) == '0xffff':
# print("Found payload with hash value 0xffff: {}".format(i))
# break
# Payload for UDP checksum 0xffff: 33495, actual UDP csum value: 0x0
# Send packet with checksum 0xffff, should be updated
ipkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='1.2.3.4',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x1234,
udp_dport=0xabcd,
udp_payload=struct.pack(
"!I", 46530),
with_udp_chksum=True)
epkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='4.3.2.1',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x4321,
udp_dport=0xabcd,
udp_payload=struct.pack(
"!I", 46530),
with_udp_chksum=True)
testutils.send_packet(self, swports[0], ipkt)
testutils.verify_packet(self, epkt, swports[1])
# Send packet with checksum, that should be updated to be 0x0000,
# and therefore requires the P4 program to flips the bits to be 0xffff
ipkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='1.2.3.4',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x1234,
udp_dport=0xabcd,
udp_payload=struct.pack(
"!I", 33495),
with_udp_chksum=True)
epkt = testutils.simple_udp_packet(eth_dst='11:11:11:11:11:11',
eth_src='00:00:00:00:00:00',
ip_src='4.3.2.1',
ip_dst='100.99.98.97',
ip_id=101,
ip_ttl=64,
udp_sport=0x4321,
udp_dport=0xabcd,
udp_payload=struct.pack(
"!I", 33495),
with_udp_chksum=True)
testutils.send_packet(self, swports[0], ipkt)
testutils.verify_packet(self, epkt, swports[1])
finally:
table_output_port.default_entry_reset(target)
table_translate.default_entry_reset(target)
