def ip_cksum_test():
p = Packet(tlspkt)
before = p.get_ip_cksum()
p.update_cksum()
after = p.get_ip_cksum()
assert (before == after)
def ip_attrib_test():
p = Packet(tlspkt)
assert (p.get_src() == '\x48\x0E\xCC\x67')
assert (p.get_dst() == '\x80\x59\x50\xF8')
assert (p.get_ip_cksum() == 0xc3a7)
assert (p.protocol == 6)