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""" test framework utilities """
import socket
import sys
from abc import abstractmethod, ABCMeta
from cStringIO import StringIO
def ppp(headline, packet):
""" Return string containing the output of scapy packet.show() call. """
o = StringIO()
old_stdout = sys.stdout
sys.stdout = o
print(headline)
packet.show()
sys.stdout = old_stdout
return o.getvalue()
def ppc(headline, capture, limit=10):
""" Return string containing ppp() printout for a capture.
:param headline: printed as first line of output
:param capture: packets to print
:param limit: limit the print to # of packets
"""
if not capture:
return headline
tail = ""
if limit < len(capture):
tail = "\nPrint limit reached, %s out of %s packets printed" % (
len(capture), limit)
limit = len(capture)
body = "".join([ppp("Packet #%s:" % count, p)
for count, p in zip(range(0, limit), capture)])
return "%s\n%s%s" % (headline, body, tail)
def ip4_range(ip4, s, e):
tmp = ip4.rsplit('.', 1)[0]
return ("%s.%d" % (tmp, i) for i in range(s, e))
def ip4n_range(ip4n, s, e):
ip4 = socket.inet_ntop(socket.AF_INET, ip4n)
return (socket.inet_pton(socket.AF_INET, ip)
for ip in ip4_range(ip4, s, e))
class NumericConstant(object):
__metaclass__ = ABCMeta
desc_dict = {}
@abstractmethod
def __init__(self, value):
self._value = value
def __int__(self):
return self._value
def __long__(self):
return self._value
def __str__(self):
if self._value in self.desc_dict:
return self.desc_dict[self._value]
return ""
class Host(object):
""" Generic test host "connected" to VPPs interface. """
@property
def mac(self):
""" MAC address """
return self._mac
@property
def ip4(self):
""" IPv4 address - string """
return self._ip4
@property
def ip4n(self):
""" IPv4 address of remote host - raw, suitable as API parameter."""
return socket.inet_pton(socket.AF_INET, self._ip4)
@property
def ip6(self):
""" IPv6 address - string """
return self._ip6
@property
def ip6n(self):
""" IPv6 address of remote host - raw, suitable as API parameter."""
return socket.inet_pton(socket.AF_INET6, self._ip6)
def __init__(self, mac=None, ip4=None, ip6=None):
self._mac = mac
self._ip4 = ip4
self._ip6 = ip6
class ForeignAddressFactory(object):
count = 0
prefix_len = 24
net_template = '10.10.10.{}'
net = net_template.format(0) + '/' + str(prefix_len)
def get_ip4(self):
if self.count > 255:
raise Exception("Network host address exhaustion")
self.count += 1
return self.net_template.format(self.count)
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