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can.uts
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% Regression tests for the CAN layer
# More information at http://www.secdev.org/projects/UTscapy/
############
############
+ Basic operations
= Load module
import math
import random
random.seed()
load_layer("can")
= Build a packet
pkt = CAN(flags="error", identifier=1234, data="test")
= Dissect & parse
pkt = CAN(raw(pkt))
pkt.flags == "error" and pkt.identifier == 1234 and pkt.length == 4 and pkt.data == b"test"
= Check flags values
pkt = CAN(flags="remote_transmission_request")
pkt.flags == 0x2
pkt = CAN(flags="extended")
pkt.flags == 0x4
############
############
+ Example PCAP file
= Read PCAP file
* From https://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=CANopen.pca
from io import BytesIO
pcap_fd = BytesIO(b'\xd4\xc3\xb2\xa1\x02\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\xe3\x00\x00\x00\xe2\xf3mT\x93\x8c\x03\x00\t\x00\x00\x00\t\x00\x00\x00\x00\x00\x073\x01\x00\x00\x00\x00\xe2\xf3mT\xae\x8c\x03\x00\n\x00\x00\x00\n\x00\x00\x00\x00\x00\x00\x00\x02\x7f\x00\x00\x81\x00\xe2\xf3mTI\x8f\x03\x00\t\x00\x00\x00\t\x00\x00\x00\x00\x00\x07B\x01\x00\x00\x00\x00\xe2\xf3mTM\x8f\x03\x00\t\x00\x00\x00\t\x00\x00\x00\x00\x00\x07c\x01\x00\x00\x00\x00\xe2\xf3mTN\x8f\x03\x00\t\x00\x00\x00\t\x00\x00\x00\x00\x00\x07!\x01\x00\x00\x00\x00\xf8\xf3mTv\x98\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00@\x08\x10\x00\x00\x00\x00\x00\xf8\xf3mT\x96\x98\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x7f\x00\x00A\x08\x10\x00\x15\x00\x00\x00\xf8\xf3mT\xd4\x98\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00`\x00\x00\x00\x00\x00\x00\x00\xf8\xf3mT\x12\x99\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x08\xf8\xf3mTC\x99\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x7f\x00\x00\x00UltraHi\xf8\xf3mTx\x99\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x08\xf8\xf3mT\xce\x99\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00p\x00\x00\x00\x00\x00\x00\x00\xf8\xf3mT\xe0\x99\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x08\xf8\xf3mT \x9a\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x08\xf8\xf3mTo\x9a\x04\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x083\xf4mTw\xbe\t\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00@\x08\x10*\x00\x00\x00\x003\xf4mT4\xc0\t\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x00\x00\x00\x80\x08\x10*\x11\x00\t\x06i\xf4mT\xb0\x88\x0c\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x07\xe5\x08\x7f\x00\x00L\x00\x00\x00\x00\x00\x00\x00i\xf4mT+\x89\x0c\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x07\xe4\x08\x7f\x00\x00P\x00\x00\x00\x00\x00\x00\x00i\xf4mT-\x89\x0c\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x07\xe4\x08\x7f\x00\x00P\x00\x00\x00\x00\x00\x00\x00i\xf4mTS\x89\x0c\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x07\xe4\x08\x7f\x00\x00P\x00\x00\x00\x00\x00\x00\x00i\xf4mT\x99\x89\x0c\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x07\xe4\x08\x00\x00\x00P\x00\x00\x00\x00\x00\x00\x00\x8e\xf4mT\x86\xc4\x04\x00\n\x00\x00\x00\n\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01B\x92\xf4mT\xae\xf0\x07\x00\n\x00\x00\x00\n\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\xba\xf4mT%\xaa\x0b\x00\n\x00\x00\x00\n\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x02c\xe8\xf4mT\xbc\x0f\x06\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00#\x00b\x01asdf\xe8\xf4mT\x07\x10\x06\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x00\x00\x00\x80\x00b\x01\x00\x00\x02\x06\x0f\xf5mT\x1c\x81\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00@\x00b\x01\x00\x00\x00\x00\x0f\xf5mT\xfe\x81\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x00\x00\x00\x80\x00b\x01\x00\x00\x02\x068\xf5mT\x19\xc3\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00\xa0\x08\x10\x00\x10\x00\x00\x008\xf5mTg\xc3\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x7f\x00\x00\xc2\x08\x10\x00\x15\x00\x00\x008\xf5mT\xd8\xc3\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x088\xf5mT\x17\xc4\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x06B\x08\x7f\x00\x00\xa3\x00\x00\x00\x00\x00\x00\x008\xf5mT\xca\xc4\x00\x00\x10\x00\x00\x00\x10\x00\x00\x00\x00\x00\x05\xc2\x08\x00\x00\x00\x80\x00\x00\x00!\x00\x00\x08')
packets = rdpcap(pcap_fd)
= Check if parsing worked: each packet has a CAN layer
all(CAN in pkt for pkt in packets)
= Check if parsing worked: no packet has a Raw or Padding layer
not any(Raw in pkt or Padding in pkt for pkt in packets)
= Identifiers
set(pkt.identifier for pkt in packets) == {0, 1474, 1602, 1825, 1843, 1858, 1891, 2020, 2021}
= Flags
set(pkt.flags for pkt in packets) == {0}
= Data length
set(pkt.length for pkt in packets) == {1, 2, 8}
############
############
+ swap-bytes functionality (for PF_CAN socket interactions)
= read PCAP of a CookedLinux/SocketCAN capture (CAN standard and extended)
conf.contribs['CAN']['swap-bytes'] = True
pcap_fd_can_a = BytesIO(b'\xd4\xc3\xb2\xa1\x02\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00q\x00\x00\x00\x15f`Zv\xde\n\x00 \x00\x00\x00 \x00\x00\x00\x00\x01\x01\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\xdf\x07\x00\x00\x03\x00\x00\x00\x02\x01\r\x00\x00\x00\x00\x00')
packets_can_a = rdpcap(pcap_fd_can_a)
pcap_fd_can_b = BytesIO(b'\xd4\xc3\xb2\xa1\x02\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00q\x00\x00\x00\xf4i`Z\xf3\x99\x07\x00 \x00\x00\x00 \x00\x00\x00\x00\x01\x01\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\xf13\xdb\x98\x03\x00\x00\x00\x02\x01\r\x00\x00\x00\x00\x00')
packets_can_b = rdpcap(pcap_fd_can_b)
= check CAN is detected over CookedLinux (each packet has both layers)
all(CAN in pkt for pkt in packets_can_a)
all(CAN in pkt for pkt in packets_can_b)
all(CookedLinux in pkt for pkt in packets_can_a)
all(CookedLinux in pkt for pkt in packets_can_b)
= Check if parsing worked: no packet has a Raw or Padding layer
not any(Raw in pkt or Padding in pkt for pkt in packets)
= Check byte swap for dissection
packets_can_a[0].identifier == 0x7df
packets_can_a[0].flags == 0x0
packets_can_b[0].identifier == 0x18db33f1
packets_can_b[0].flags == "extended"
= Check byte swap-back for building
raw(packets_can_a[0]) == b'\x00\x01\x01\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\xdf\x07\x00\x00\x03\x00\x00\x00\x02\x01\r\x00\x00\x00\x00\x00'
raw(packets_can_b[0]) == b'\x00\x01\x01\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\xf13\xdb\x98\x03\x00\x00\x00\x02\x01\r\x00\x00\x00\x00\x00'
conf.contribs['CAN']['swap-bytes'] = False
= Check building CAN packet with not padded data field
* check building
p = CAN(flags='error', identifier=1234, data=b'')
bytes(p)
p = CAN(flags='error', identifier=1234, data=b'\x0a\x0b')
bytes(p)
* check padding handling
p_too_much_data = CAN(flags='error', length=1, identifier=1234, data=b'\x01\x02')
p = CAN(bytes(p_too_much_data))
p.haslayer('Padding') and p['Padding'].load == b'\x02'
= Check rdcandump default
* default reading
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan0 1F334455#1122334455667788
(1539191494.084177) vcan0 1F334455#1122334455667788
(1539191494.724228) vcan0 1F334455#1122334455667788
(1539191495.148182) vcan0 1F334455#1122334455667788
(1539191495.563320) vcan0 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd)
assert len(packets) == 9
assert packets[0].identifier == 0x123
assert packets[8].identifier == 0x1F334455
assert packets[8].flags == 0b100
assert packets[0].length == 4
assert packets[8].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[8].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= Check rdcandump_iterable default
* default reading
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan0 1F334455#1122334455667788
(1539191494.084177) vcan0 1F334455#1122334455667788
(1539191494.724228) vcan0 1F334455#1122334455667788
(1539191495.148182) vcan0 1F334455#1122334455667788
(1539191495.563320) vcan0 1F334455#1122334455667788''')
packets = [x for x in CandumpReader(pcap_fd)]
assert len(packets) == 9
assert packets[0].identifier == 0x123
assert packets[8].identifier == 0x1F334455
assert packets[8].flags == 0b100
assert packets[0].length == 4
assert packets[8].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[8].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= Check rdcandump filter
* interface filter 1
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan1 123#11223344
(1539191471.503168) vcan1 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan0 1F334455#1122334455667788
(1539191494.084177) vcan1 1F334455#1122334455667788
(1539191494.724228) vcan1 1F334455#1122334455667788
(1539191495.148182) vcan0 1F334455#1122334455667788
(1539191495.563320) vcan1 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd, interface="vcan0")
assert len(packets) == 4
assert packets[0].identifier == 0x123
assert packets[-1].identifier == 0x1F334455
assert packets[-1].flags == 0b100
assert packets[0].length == 4
assert packets[-1].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[-1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
* interface filter 2
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan1 1F334455#1122334455667788
(1539191494.084177) vcan1 1F334455#1122334455667788
(1539191494.724228) vcan1 1F334455#1122334455667788
(1539191495.148182) vcan1 1F334455#1122334455667788
(1539191495.563320) vcan1 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd, interface="vcan0")
assert len(packets) == 4
assert packets[0].identifier == 0x123
assert packets[0].length == 4
assert packets[0].data == b'\x11\x22\x33\x44'
* interface filter 3
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan1 1F334455#1122334455667788
(1539191494.084177) vcan1 1F334455#1122334455667788
(1539191494.724228) vcan1 1F334455#1122334455667788
(1539191495.148182) vcan1 1F334455#1122334455667788
(1539191495.563320) vcan1 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd, interface="vcan1")
assert len(packets) == 5
assert packets[-1].identifier == 0x1F334455
assert packets[-1].flags == 0b100
assert packets[-1].length == 8
assert packets[-1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
* interface filter 4
pcap_fd = BytesIO(b'''(1539191392.761779) vcan2 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan2 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan1 1F334455#1122334455667788
(1539191494.084177) vcan1 1F334455#1122334455667788
(1539191494.724228) vcan2 1F334455#1122334455667788
(1539191495.148182) vcan1 1F334455#1122334455667788
(1539191495.563320) vcan2 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd, interface=["vcan1", "vcan0"])
assert len(packets) == 5
assert packets[0].identifier == 0x123
assert packets[-1].identifier == 0x1F334455
assert packets[-1].flags == 0b100
assert packets[0].length == 4
assert packets[-1].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[-1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
+ Check rdcandump not log file format
= interface not log file format
pcap_fd = BytesIO(b''' vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44''')
packets = rdcandump(pcap_fd)
assert len(packets) == 8
packets[-1].show()
assert packets[-1].identifier == 0x1F3
assert packets[1].identifier == 0x1F3
assert packets[0].identifier == 0x1F334455
assert packets[0].flags == 0b100
assert packets[-1].length == 4
assert packets[0].length == 8
assert packets[1].length == 8
assert packets[-1].data == b'\x11\x22\x33\x44'
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= interface not log file format filtered 1
pcap_fd = BytesIO(b''' vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan1 1F3 [8] 11 22 33 44 55 66 77 88
vcan1 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan1 1F334455 [8] 11 22 33 44 55 66 77 88
vcan1 1F334455 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44
''')
packets = rdcandump(pcap_fd, interface="vcan0")
assert len(packets) == 4
assert packets[-1].identifier == 0x1F3
assert packets[2].identifier == 0x1F3
assert packets[0].identifier == 0x1F334455
assert packets[0].flags == 0b100
assert packets[-1].length == 4
assert packets[0].length == 8
assert packets[2].length == 8
assert packets[-1].data == b'\x11\x22\x33\x44'
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[2].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= interface not log file format filtered 2
pcap_fd = BytesIO(b''' vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan1 1F3 [8] 11 22 33 44 55 66 77 88
vcan2 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan1 1F334455 [8] 11 22 33 44 55 66 77 88
vcan2 1F334455 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44
''')
packets = rdcandump(pcap_fd, interface=["vcan0", "vcan1"])
assert len(packets) == 6
assert packets[-1].identifier == 0x1F3
assert packets[1].identifier == 0x1F3
assert packets[0].identifier == 0x1F334455
assert packets[0].flags == 0b100
assert packets[-1].length == 4
assert packets[0].length == 8
assert packets[1].length == 8
assert packets[-1].data == b'\x11\x22\x33\x44'
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
+ Check rdcandump count
= interface not log file format filtered 2 count 1
pcap_fd = BytesIO(b''' vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan1 1F3 [8] 11 22 33 44 55 66 77 88
vcan2 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan2 1F334455 [8] 11 22 33 44 55 66 77 88
vcan2 1F334455 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44
''')
packets = rdcandump(pcap_fd, interface=["vcan2"],
count=2)
assert len(packets) == 2
assert packets[0].identifier == 0x1F3
assert packets[-1].identifier == 0x1F334455
assert packets[-1].flags == 0b100
assert packets[-1].length == 8
assert packets[0].length == 8
assert packets[1].length == 8
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= interface not log file format filtered 2 count 2
pcap_fd = BytesIO(b''' vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan1 1F3 [8] 11 22 33 44 55 66 77 88
vcan2 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F334455 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan2 1F334455 [8] 11 22 33 44 55 66 77 88
vcan2 1F334455 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44
''')
packets = rdcandump(pcap_fd, count=2)
assert len(packets) == 2
assert packets[1].identifier == 0x1F3
assert packets[0].identifier == 0x1F334455
assert packets[0].flags == 0b100
assert packets[-1].length == 8
assert packets[0].length == 8
assert packets[1].length == 8
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= default reading
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan0 1F334455#1122334455667788
(1539191494.084177) vcan0 1F334455#1122334455667788
(1539191494.724228) vcan0 1F334455#1122334455667788
(1539191495.148182) vcan0 1F334455#1122334455667788
(1539191495.563320) vcan0 1F334455#1122334455667788''')
packets = rdcandump(pcap_fd, count=5)
assert len(packets) == 5
assert packets[0].identifier == 0x123
assert packets[-1].identifier == 0x1F334455
assert packets[-1].flags == 0b100
assert packets[0].length == 4
assert packets[-1].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[-1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
+ Check rdcandump default extended frames id < 0x7ff
= default reading
pcap_fd = BytesIO(b'''(1539191392.761779) vcan0 123#11223344
(1539191470.820239) vcan0 123#11223344
(1539191471.503168) vcan0 123#11223344
(1539191471.891423) vcan0 123#11223344
(1539191492.026403) vcan0 00000055#1122334455667788
(1539191494.084177) vcan0 00000055#1122334455667788
(1539191494.724228) vcan0 00000055#1122334455667788
(1539191495.148182) vcan0 00000055#1122334455667788
(1539191495.563320) vcan0 00000055#1122334455667788''')
packets = rdcandump(pcap_fd)
assert len(packets) == 9
assert packets[0].identifier == 0x123
assert packets[8].identifier == 0x55
assert packets[8].flags == 0b100
assert packets[0].length == 4
assert packets[8].length == 8
assert packets[0].data == b'\x11\x22\x33\x44'
assert packets[8].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
= interface not log file format
pcap_fd = BytesIO(b''' vcan0 00000055 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 00000055 [8] 11 22 33 44 55 66 77 88
vcan0 1F3 [8] 11 22 33 44 55 66 77 88
vcan0 00000055 [8] 11 22 33 44 55 66 77 88
vcan0 00000055 [4] 11 22 33 44
vcan0 1F3 [4] 11 22 33 44''')
packets = rdcandump(pcap_fd)
assert len(packets) == 8
packets[-1].show()
assert packets[-1].identifier == 0x1F3
assert packets[1].identifier == 0x1F3
assert packets[0].identifier == 0x55
assert packets[0].flags == 0b100
assert packets[-1].length == 4
assert packets[0].length == 8
assert packets[1].length == 8
assert packets[-1].data == b'\x11\x22\x33\x44'
assert packets[0].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
assert packets[1].data == b'\x11\x22\x33\x44\x55\x66\x77\x88'
########
########
+ CAN Signals
= Test invalid fields_desc
class testFrame1(SignalPacket):
fields_desc = [
ByteField("sig0", 0),
SignalField("sig1", default=0, start=7, size=6, fmt=">B")
]
passed = False
try:
testFrame1(b"\xff\xff")
except Scapy_Exception:
passed = True
assert passed
= Test invalid fields_desc with ConditionalField
class testFrame1(SignalPacket):
fields_desc = [
ConditionalField(ByteField("sig0", 0), lambda x: True),
SignalField("sig1", default=0, start=7, size=6, fmt=">B")
]
passed = False
try:
testFrame1(b"\xff\xff")
except Scapy_Exception:
passed = True
assert passed
= Motorola byte order (Big Endian) dissect test
class testFrame1(SignalPacket):
fields_desc = [
SignalField("sig0", default=0, start=1, size=2, fmt=">B"),
SignalField("sig1", default=0, start=7, size=6, fmt=">B"),
SignalField("sig2", default=0, start=15, size=11, fmt=">B"),
SignalField("sig3", default=0, start=20, size=12, fmt=">B"),
SignalField("sig4", default=0, start=24, size=9, fmt=">B"),
SignalField("sig7", default=0, start=47, size=10, fmt=">B"),
SignalField("sig5", default=0, start=50, size=3, fmt=">B"),
SignalField("sig6", default=0, start=53, size=3, fmt=">B"),
SignalField("sig8", default=0, start=58, size=3, fmt=">B"),
SignalField("sig9", default=0, start=61, size=3, fmt=">B"),
SignalField("sig10", default=0, start=63, size=2, fmt=">B")
]
pkt = testFrame1(b'\xff\xff\xff\xff\xff\xff\xff\xff')
assert pkt.sig0 == 3
assert pkt.sig1 == 0x3f
assert pkt.sig2 == 0x7ff
assert pkt.sig3 == 0xfff
assert pkt.sig4 == 0x1ff
assert pkt.sig7 == 0x3ff
assert pkt.sig5 == 7
assert pkt.sig6 == 7
assert pkt.sig8 == 7
assert pkt.sig9 == 7
assert pkt.sig10 == 3
pkt = testFrame1(struct.pack("<Q", int("10010101" # byte 7: 63 - 56
"11010101"
"10000000"
"00000001"
"11111110"
"11100000"
"00000001"
"01010101",2))) # byte 0: 7 - 0
assert pkt.sig0 == 1
assert pkt.sig1 == 21
assert pkt.sig2 == 15
assert pkt.sig3 == 0x7f
assert pkt.sig4 == 0x1
assert pkt.sig7 == 0x203
assert pkt.sig5 == 5
assert pkt.sig6 == 2
assert pkt.sig8 == 5
assert pkt.sig9 == 2
assert pkt.sig10 == 2
= Motorola byte order (Big Endian) build test
pkt = testFrame1()
pkt.sig0 = 1
pkt.sig1 = 21
pkt.sig2 = 15
pkt.sig3 = 0x7f
pkt.sig4 = 0x1
pkt.sig7 = 0x203
pkt.sig5 = 5
pkt.sig6 = 2
pkt.sig8 = 5
pkt.sig9 = 2
pkt.sig10 = 2
test = bytes(pkt)
assert bytes(test) == b'U\x01\xe0\xfe\x01\x80\xd5\x95'
= Motorola byte order (Big Endian) dissect test with mixed field order
class testFrame1(SignalPacket):
fields_desc = [
SignalField("sig10", default=0, start=63, size=2, fmt=">B"),
SignalField("sig0", default=0, start=1, size=2, fmt=">B"),
SignalField("sig9", default=0, start=61, size=3, fmt=">B"),
SignalField("sig5", default=0, start=50, size=3, fmt=">B"),
SignalField("sig4", default=0, start=24, size=9, fmt=">B"),
SignalField("sig7", default=0, start=47, size=10, fmt=">B"),
SignalField("sig3", default=0, start=20, size=12, fmt=">B"),
SignalField("sig6", default=0, start=53, size=3, fmt=">B"),
SignalField("sig2", default=0, start=15, size=11, fmt=">B"),
SignalField("sig8", default=0, start=58, size=3, fmt=">B"),
SignalField("sig1", default=0, start=7, size=6, fmt=">B"),
]
pkt = testFrame1(struct.pack("<Q", int("10010101" # byte 7: 63 - 56
"11010101"
"10000000"
"00000001"
"11111110"
"11100000"
"00000001"
"01010101",2))) # byte 0: 7 - 0
assert pkt.sig0 == 1
assert pkt.sig1 == 21
assert pkt.sig2 == 15
assert pkt.sig3 == 0x7f
assert pkt.sig4 == 0x1
assert pkt.sig7 == 0x203
assert pkt.sig5 == 5
assert pkt.sig6 == 2
assert pkt.sig8 == 5
assert pkt.sig9 == 2
assert pkt.sig10 == 2
= Motorola byte order (Big Endian) build test with mixed field order
class testFrame1(SignalPacket):
fields_desc = [
SignalField("sig3", default=0, start=20, size=12, fmt=">B"),
SignalField("sig4", default=0, start=24, size=9, fmt=">B"),
SignalField("sig10", default=0, start=63, size=2, fmt=">B"),
SignalField("sig2", default=0, start=15, size=11, fmt=">B"),
SignalField("sig5", default=0, start=50, size=3, fmt=">B"),
SignalField("sig1", default=0, start=7, size=6, fmt=">B"),
SignalField("sig6", default=0, start=53, size=3, fmt=">B"),
SignalField("sig7", default=0, start=47, size=10, fmt=">B"),
SignalField("sig9", default=0, start=61, size=3, fmt=">B"),
SignalField("sig0", default=0, start=1, size=2, fmt=">B"),
SignalField("sig8", default=0, start=58, size=3, fmt=">B"),
]
pkt = testFrame1()
pkt.sig0 = 1
pkt.sig1 = 21
pkt.sig2 = 15
pkt.sig3 = 0x7f
pkt.sig4 = 0x1
pkt.sig7 = 0x203
pkt.sig5 = 5
pkt.sig6 = 2
pkt.sig8 = 5
pkt.sig9 = 2
pkt.sig10 = 2
test = bytes(pkt)
print(test)
assert bytes(test) == b'U\x01\xe0\xfe\x01\x80\xd5\x95'
= Intel byte order (Little Endian) dissect test
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig5", default=0, start=34, size=3, fmt="<B"),
SignalField("secSig6", default=0, start=37, size=3, fmt="<B"),
SignalField("secSig9", default=0, start=52, size=3, fmt="<B"),
SignalField("secSig2", default=0, start=55, size=1, fmt="<B"),
SignalField("secSig8", default=0, start=56, size=3, fmt="<B"),
SignalField("secSig7", default=0, start=59, size=1, fmt="<B"),
SignalField("secSig1", default=0, start=60, size=2, fmt="<B"),
SignalField("secSig4", default=0, start=62, size=2, fmt="<B"),
]
pkt = testFrame2(b'\xff\xff\xff\xff\xff\xff\xff\xff')
assert pkt.secSig1 == 0x3
assert pkt.secSig2 == 0x1
assert pkt.secSig3 == 0xf
assert pkt.secSig4 == 0x3
assert pkt.secSig7 == 0x1
assert pkt.secSig5 == 7
assert pkt.secSig6 == 7
assert pkt.secSig8 == 7
assert pkt.secSig9 == 7
assert pkt.secSig10 == 0xfff
assert pkt.secSig11 == 0x3ff
assert pkt.secSig12 == 0xff
pkt = testFrame2(struct.pack("<Q", int("10010101" # byte 7: 63 - 56
"11010101"
"10000000"
"00000001"
"11111110"
"11100000"
"00000001"
"10100101",2))) # byte 0: 7 - 0
assert pkt.secSig1 == 0x1
assert pkt.secSig2 == 0x1
assert pkt.secSig3 == 0xe
assert pkt.secSig4 == 0x2
assert pkt.secSig7 == 0x0
assert pkt.secSig5 == 0
assert pkt.secSig6 == 0
assert pkt.secSig8 == 5
assert pkt.secSig9 == 5
assert pkt.secSig10 == 1
assert pkt.secSig11 == 0x1fe
assert pkt.secSig12 == 0xA5
= Intel byte order (Little Endian) build test
pkt = testFrame2()
pkt.secSig12 = 0xA5
pkt.secSig10 = 1
pkt.secSig3 = 14
pkt.secSig11 = 0x1fe
pkt.secSig5 = 0
pkt.secSig6 = 0
pkt.secSig9 = 5
pkt.secSig2 = 1
pkt.secSig8 = 5
pkt.secSig7 = 0
pkt.secSig1 = 1
pkt.secSig4 = 2
assert bytes(pkt) == b'\xa5\x01\xe0\xfe\x01\x00\xd0\x95'
= Intel byte order (Little Endian) build test with mixed field order
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig1", default=0, start=60, size=2, fmt="<B"),
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
SignalField("secSig2", default=0, start=55, size=1, fmt="<B"),
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig5", default=0, start=34, size=3, fmt="<B"),
SignalField("secSig9", default=0, start=52, size=3, fmt="<B"),
SignalField("secSig8", default=0, start=56, size=3, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig7", default=0, start=59, size=1, fmt="<B"),
SignalField("secSig6", default=0, start=37, size=3, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
SignalField("secSig4", default=0, start=62, size=2, fmt="<B"),
]
pkt = testFrame2()
pkt.secSig12 = 0xA5
pkt.secSig10 = 1
pkt.secSig3 = 14
pkt.secSig11 = 0x1fe
pkt.secSig5 = 0
pkt.secSig6 = 0
pkt.secSig9 = 5
pkt.secSig2 = 1
pkt.secSig8 = 5
pkt.secSig7 = 0
pkt.secSig1 = 1
pkt.secSig4 = 2
assert bytes(pkt) == b'\xa5\x01\xe0\xfe\x01\x00\xd0\x95'
= Intel byte order (Little Endian) build test with short package
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
]
pkt = testFrame2()
pkt.secSig12 = 0xA5
pkt.secSig10 = 1
pkt.secSig3 = 14
pkt.secSig11 = 0x1fe
assert bytes(pkt) == b'\xa5\x01\xe0\xfe\x01'
assert len(pkt) == 5
pkt.secSig11 = 0x0fe
assert bytes(pkt) == b'\xa5\x01\xe0\xfe\x00'
assert len(pkt) == 5
= Packet with mixed endianness fields build test
class testFrame3(SignalPacket):
fields_desc = [
SignalField("myMuxer", default=0, start=53, size=3, fmt="<B"),
SignalField("muxSig5", default=0, start=22, size=7, fmt="<B"),
SignalField("muxSig6", default=0, start=32, size=9, fmt="<B"),
SignalField("muxSig7", default=0, start=2, size=8, fmt=">B"),
SignalField("muxSig8", default=0, start=3, size=3, fmt="<B"),
SignalField("muxSig9", default=0, start=41, size=7, fmt="<B"),
]
pkt = testFrame3()
pkt.myMuxer = 0x7
pkt.muxSig5 = 0x72
pkt.muxSig6 = 0x10f
pkt.muxSig7 = 0xA5
pkt.muxSig8 = 0x03
pkt.muxSig9 = 0x11
assert bytes(pkt) == b'\x1d\x28\x80\x1c\x0f\x23\xe0'
assert len(pkt) == 7
= Muxed Packet with mixed endianness fields build test
class testFrame3(SignalPacket):
fields_desc = [
SignalField("myMuxer", default=0, start=53, size=3, fmt="<B"),
ConditionalField(SignalField("muxSig5", default=0, start=22, size=7, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig6", default=0, start=32, size=9, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig7", default=0, start=2, size=8, fmt=">B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig8", default=0, start=3, size=3, fmt="<B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig9", default=0, start=41, size=7, fmt="<B"), lambda p: p.myMuxer == 1)
]
pkt = testFrame3()
pkt.myMuxer = 0x0
pkt.muxSig5 = 0x72
pkt.muxSig6 = 0x10f
pkt.muxSig7 = 0xA5
pkt.muxSig8 = 0x03
pkt.muxSig9 = 0x11
assert bytes(pkt) == b'\x1d\x28\x00\x00\x00\x00\x00'
assert len(pkt) == 7
pkt.myMuxer = 0x1
assert bytes(pkt) == b'\x00\x00\x80\x1c\x0f\x23\x20'
assert len(pkt) == 7
= Muxed Packet build test
class testFrame3(SignalPacket):
fields_desc = [
SignalField("myMuxer", default=0, start=0, size=8, fmt="<B"),
ConditionalField(SignalField("muxSig5", default=0, start=8, size=8, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig6", default=0, start=8, size=16, fmt="<B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig7", default=0, start=16, size=8, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig8", default=0, start=24, size=8, fmt="<B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig9", default=0, start=32, size=8, fmt="<B"), lambda p: p.myMuxer == 0)
]
pkt = testFrame3(b'\x01\xff\xff\xff\xff\xff\xff')
assert pkt.myMuxer == 0x1
assert pkt.muxSig5 == 0xff
assert pkt.muxSig7 == 0xff
pkt = testFrame3(b'\x00\xff\xff\xff\xff\xff\xff')
assert pkt.myMuxer == 0x0
assert pkt.muxSig6 == 0xffff
assert pkt.muxSig8 == 0xff
assert pkt.muxSig9 == 0xff
pkt = testFrame3()
pkt.myMuxer = 0x1
pkt.muxSig5 = 0xaa
pkt.muxSig7 = 0xaa
assert bytes(pkt) == b'\x01\xaa\xaa'
assert len(pkt) == 3
pkt = testFrame3()
pkt.myMuxer = 0x0
pkt.muxSig5 = 0xaa
pkt.muxSig6 = 0xbb
pkt.muxSig7 = 0xaa
pkt.muxSig8 = 0xbb
pkt.muxSig9 = 0xbb
assert bytes(pkt) == b'\x00\xbb\x00\xbb\xbb'
assert len(pkt) == 5
= SignalHeader Muxed Packet build test
conf.contribs['CAN']['swap-bytes'] = False
class testFrame3(SignalPacket):
fields_desc = [
SignalField("myMuxer", default=0, start=0, size=8, fmt="<B"),
ConditionalField(SignalField("muxSig5", default=0, start=8, size=8, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig6", default=0, start=8, size=16, fmt="<B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig7", default=0, start=16, size=8, fmt="<B"), lambda p: p.myMuxer == 1),
ConditionalField(SignalField("muxSig8", default=0, start=24, size=8, fmt="<B"), lambda p: p.myMuxer == 0),
ConditionalField(SignalField("muxSig9", default=0, start=32, size=8, fmt="<B"), lambda p: p.myMuxer == 0)
]
bind_layers(SignalHeader, testFrame3, identifier=0x123)
pkt = SignalHeader(b'\x00\x00\x01#\x00\x00\x00\x00\x01\xff\xff\xff\xff\xff\xff')
assert pkt.myMuxer == 0x1
assert pkt.muxSig5 == 0xff
assert pkt.muxSig7 == 0xff
pkt = SignalHeader(b'\x00\x00\x01#\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff')
assert pkt.myMuxer == 0x0
assert pkt.muxSig6 == 0xffff
assert pkt.muxSig8 == 0xff
assert pkt.muxSig9 == 0xff
pkt = SignalHeader()/testFrame3()
pkt.myMuxer = 0x1
pkt.muxSig5 = 0xaa
pkt.muxSig7 = 0xaa
assert bytes(pkt) == b'\x00\x00\x01#\x03\x00\x00\x00\x01\xaa\xaa'
assert len(pkt) == 8 + 3
pkt = SignalHeader()/testFrame3()
pkt.myMuxer = 0x0
pkt.muxSig5 = 0xaa
pkt.muxSig6 = 0xbb
pkt.muxSig7 = 0xaa
pkt.muxSig8 = 0xbb
pkt.muxSig9 = 0xbb
assert bytes(pkt) == b'\x00\x00\x01#\x05\x00\x00\x00\x00\xbb\x00\xbb\xbb'
assert len(pkt) == 8 + 5
= Intel byte order (Little Endian) SignalPacket dissect test
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig5", default=0, start=34, size=3, fmt="<B"),
SignalField("secSig6", default=0, start=37, size=3, fmt="<B"),
SignalField("secSig9", default=0, start=52, size=3, fmt="<B"),
SignalField("secSig2", default=0, start=55, size=1, fmt="<B"),
SignalField("secSig8", default=0, start=56, size=3, fmt="<B"),
SignalField("secSig7", default=0, start=59, size=1, fmt="<B"),
SignalField("secSig1", default=0, start=60, size=2, fmt="<B"),
SignalField("secSig4", default=0, start=62, size=2, fmt="<B"),
]
pkt = testFrame2(b'\xff\xff\xff\xff\xff\xff\xff\xff')
assert pkt.secSig1 == 0x3
assert pkt.secSig2 == 0x1
assert pkt.secSig3 == 0xf
assert pkt.secSig4 == 0x3
assert pkt.secSig7 == 0x1
assert pkt.secSig5 == 7
assert pkt.secSig6 == 7
assert pkt.secSig8 == 7
assert pkt.secSig9 == 7
assert pkt.secSig10 == 0xfff
assert pkt.secSig11 == 0x3ff
assert pkt.secSig12 == 0xff
assert len(pkt) == 8
pkt = testFrame2(struct.pack("<Q", int("10010101" # byte 7: 63 - 56
"11010101"
"10000000"
"00000001"
"11111110"
"11100000"
"00000001"
"10100101",2))) # byte 0: 7 - 0
assert pkt.secSig1 == 0x1
assert pkt.secSig2 == 0x1
assert pkt.secSig3 == 0xe
assert pkt.secSig4 == 0x2
assert pkt.secSig7 == 0x0
assert pkt.secSig5 == 0
assert pkt.secSig6 == 0
assert pkt.secSig8 == 5
assert pkt.secSig9 == 5
assert pkt.secSig10 == 1
assert pkt.secSig11 == 0x1fe
assert pkt.secSig12 == 0xA5
assert len(pkt) == 8
= Intel byte order (Little Endian) short SignalPacket dissect test
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig5", default=0, start=34, size=3, fmt="<B"),
SignalField("secSig6", default=0, start=37, size=3, fmt="<B"),
]
pkt = testFrame2(b'\xff\xff\xff\xff\xff')
assert pkt.secSig3 == 0xf
assert pkt.secSig5 == 7
assert pkt.secSig6 == 7
assert pkt.secSig10 == 0xfff
assert pkt.secSig11 == 0x3ff
assert pkt.secSig12 == 0xff
assert len(pkt) == 5
pkt = testFrame2(struct.pack("<Q", int("00000001"
"11111110"
"11100000"
"00000001"
"10100101",2))[0:5])
assert pkt.secSig3 == 0xe
assert pkt.secSig5 == 0
assert pkt.secSig6 == 0
assert pkt.secSig10 == 1
assert pkt.secSig11 == 0x1fe
assert pkt.secSig12 == 0xA5
assert len(pkt) == 5
= Intel byte order (Little Endian) short SignalPacket dissect test mixed field order
class testFrame2(SignalPacket):
fields_desc = [
SignalField("secSig3", default=0, start=20, size=4, fmt="<B"),
SignalField("secSig6", default=0, start=37, size=3, fmt="<B"),
SignalField("secSig11", default=0, start=24, size=10, fmt="<B"),
SignalField("secSig10", default=0, start=8, size=12, fmt="<B"),
SignalField("secSig5", default=0, start=34, size=3, fmt="<B"),
SignalField("secSig12", default=0, start=0, size=8, fmt="<B"),
]
pkt = testFrame2(b'\xff\xff\xff\xff\xff')
assert pkt.secSig3 == 0xf
assert pkt.secSig5 == 7
assert pkt.secSig6 == 7
assert pkt.secSig10 == 0xfff
assert pkt.secSig11 == 0x3ff
assert pkt.secSig12 == 0xff
assert len(pkt) == 5
pkt = testFrame2(struct.pack("<Q", int("00000001"
"11111110"
"11100000"
"00000001"