import socket
import sys
+from abc import abstractmethod, ABCMeta
from cStringIO import StringIO
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
+ result = headline + "\n"
+ count = 1
+ for p in capture:
+ result.append(ppp("Packet #%s:" % count, p))
+ count += 1
+ if count >= limit:
+ break
+ if limit < len(capture):
+ result.append(
+ "Capture contains %s packets in total, of which %s were printed" %
+ (len(capture), limit))
+
+
+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. """