def __init__(self, *args, **kwargs):
"""Constructor.
:param addr: Address for parent network interface [default=None].
:param args: Additional arguments passed to `RouteTable` constructor.
:param kwargs: Additional keywords passed to `RouteTable` constructor.
"""
RouteTable.__init__(self, *args, **kwargs)
# set default parameters
if self.timeout is None:
self.timeout = self.DefaultTimeout
def hasroute(self, dest, path="ignore"):
"""Overloaded to allow checking for a specific path."""
r = RouteTable.hasroute(self, dest)
if r and (path!="ignore"):
nhlist = [h for (c,t,h) in self.data[dest]['list']]
r = (path in nhlist)
return r
def addroute(self, dest, nexthop=None, cost=None):
"""Cache intermediate destinations."""
rval = RouteTable.addroute(self, dest, nexthop, cost)
if DSR_CACHE_ALL_HOPS and nexthop:
# check if nexthop is valid source route
isiter = True
try: x = iter(nexthop)
except: isiter = False
isiter &= not isinstance(nexthop, str)
errmsg = "[ROUTECACHE]: Invalid source route (%s)"%(nexthop)
assert (isiter), errmsg
# cache intermediate hops
for k in range(len(nexthop)):
dst = nexthop[k] # intermediate node
path = nexthop[:k] # truncated path to intermediate node
if not path: path = None
RouteTable.addroute(self, dst, path, None)
return rval
