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#!/usr/bin/env python
# Thu, 13 Mar 14 (PDT)
# ip6.py: Demonstrate IPv6 objects
# Copyright (C) 2015, Nevil Brownlee, U Auckland | WAND
from plt_testing import *
t = get_example_trace('anon-v4.pcap')
n = 0; offset = 12
blanks = ' ' * (offset+5)
for pkt in t:
n += 1 # Wireshark uses 1-org packet numbers
if n == 11:
break
ip = pkt.ip
if not ip:
continue
l2 = pkt.layer2
test_println("n=%3d, kind=%s, type=%s, size=%d, linktype=%d, ethertype=%04x" % (
n, l2.kind, l2.type, l2.size, l2.linktype, l2.ethertype), get_tag("n:"+str(n)))
print_data('Packet:', offset, pkt.data, 64, get_tag("n:"+str(n)))
test_println("%s== kind=%s, type=%s" % (blanks, pkt.kind, pkt.type), get_tag("n:"+str(n)))
l2data = l2.data
print_data('L2 before:', offset, l2data, 64, get_tag("n:"+str(n)))
l2data[0] = 0x55; l2data[1] = 0x66; l2data[2] = 0x77;
l2.data = l2data # Write new values into first three bytes
print_data('L2 after:', offset, l2.data, 64, get_tag("n:"+str(n)))
test_println("%s== kind=%s, type=%s" % (blanks, l2.kind, l2.type), get_tag("n:"+str(n)))
l3 = pkt.layer3
print_data('Layer3:', offset, l3.data, 64, get_tag("n:"+str(n)))
test_println("%s== kind=%s, type=%s" % (blanks, l3.kind, l3.type), get_tag("n:"+str(n)))
tr = pkt.transport
print_data('Transport:', offset, tr.data, 64, get_tag("n:"+str(n)))
test_println("%s== kind=%s, type=%s, proto=%d" % (
blanks, tr.kind, tr.type, tr.proto), get_tag("n:"+str(n)))
ipdata = ip.data
print_data('IP:', offset, ipdata, 64, get_tag("n:"+str(n)))
test_println("%s== kind=%s, type=%s, ip.proto=%d" % (
blanks, ip.kind, ip.type, ip.proto), get_tag("n:"+str(n)))
test_println('')
t.close() # Don't do this inside the loop!
test_println("%d packets in trace\n" % (n), get_tag())
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