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Use UDP for testing checksums

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This commit is contained in:
Nico Schottelius 2019-06-29 17:13:28 +02:00
parent 2ed8282687
commit b757a3c2b0
3 changed files with 39 additions and 50 deletions
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40
bin/checksum_delta_diff_test.py
View file

@ -1,5 +1,6 @@
#!/usr/bin/python3
#from __future__ import unicode_literals
from scapy.all import *
if __name__ == '__main__':
@ -8,39 +9,52 @@ if __name__ == '__main__':
e0 = Ether(src="00:00:00:00:00:00",
dst="00:00:00:00:00:00")
e = Ether(src="02:53:55:42:45:01",
dst='ff:ff:ff:ff:ff:ff')
i0 = IP(src = "0.0.0.0",
dst = "0.0.0.0")
i4 = IP(src = "192.168.1.1",
dst = "192.168.4.2")
i6 = IPv6(src = "2001:db8:42::1",
dst = "2001:db8::2")
t0 = TCP(dport=0, sport=0)
#t = TCP(dport=80, sport=random.randint(49152,65535))
# print("chk_t = {}".format(t))
e = Ether(src="02:53:55:42:45:01", dst='ff:ff:ff:ff:ff:ff')
i4 = IP(src = "192.168.1.1", dst = "192.168.4.2")
i6 = IPv6(src = "2001:db8:42::1", dst = "2001:db8::2")
i62 = IPv6(src = "2001:db8:42::2", dst = "2001:db8::2")
t = TCP(dport=80, sport=1337)
u = UDP(dport=80, sport=1337)
#print("chk_t = {}".format(t))
d0 = ""
d = "A"
p.append(e / i4 / t / d)
p.append(e / i6 / t / d)
p.append(e / i4 / u / d)
p.append(e / i6 / u / d)
p.append(e / i62 / u / d)
for packet in p:
print("p = {}".format(packet.__repr__()))
packet_rebuild = packet.__class__(str(packet))
chk_old = packet[TCP].chksum
chk_new = packet_rebuild[TCP].chksum
print("rebuild = {}".format(packet_rebuild.__repr__()))
chk_old = packet[UDP].chksum
chk_new = packet_rebuild[UDP].chksum
print("chk1 = {} chk2={}".format(chk_old, chk_new))
# Get diffs -- for UDP
# udp_v4 =
# hdr.ipv4.src_addr,
# hdr.ipv4.dst_addr,
# 8w0,
# hdr.ipv4.protocol,
# meta.length_without_ip_header,
# // UDP header
# hdr.udp.src_port,
# hdr.udp.dst_port,
# hdr.udp.payload_length
# Checksums:
# - tcp
# - udp

37
bin/checksum_test.py
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@ -1,37 +0,0 @@
#!/usr/bin/python3
from scapy.all import *
if __name__ == '__main__':
p = []
e0 = Ether(src="00:00:00:00:00:00",
dst="00:00:00:00:00:00")
e = Ether(src="02:53:55:42:45:01",
dst='ff:ff:ff:ff:ff:ff')
i0 = IP(src = "0.0.0.0",
dst = "0.0.0.0")
i4 = IP(src = "192.168.1.1",
dst = "192.168.4.2")
i6 = IPv6(src = "2001:db8:42::1",
dst = "2001:db8::2")
t0 = TCP(dport=0, sport=0)
t = TCP(dport=80, sport=random.randint(49152,65535))
d0 = ""
d = "A"
p.append(e0 / i0 / t0 / d0)
p.append(e / i4 / t / d)
# p.append(e / i6 / t / d)
for test in p:
print("p = {}".format(test.__repr__())!)
packet_raw = str(test)
checksum_scapy = IP(packet_raw)[TCP].chksum
print("chk = {}".format(checksum_scapy))

12
doc/plan.org
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@ -3198,6 +3198,18 @@ ERROR: failed to convert p.ethernet.dstAddr of type <type 'str'> to an integer
**** TODO Explore PX
*** TODO Integrate nat64 code into netfpga
**** figure out how to do ANY checksums
** Diff / Delta based checksums
*** create test case / test theory
**** TODO try first v6/v6
**** using python/struct
***** find right byte orders
**** using python/scapy
#+BEGIN_CENTER
#+END_CENTER
**** using p4
**** using p4/netpfga
** NAT64/NAT46 Features in jool and tayga
*** TODO Static 1:1 NAT46: translate from IPv4 to IPv6 with a table
**** TODO TCP