def _testmirror(rh, testinfodict):
manifestdict = uppirlib.parse_manifest(_global_rawmanifestdata)
myxordatastore = fastsimplexordatastore.XORDatastore(manifestdict['blocksize'], manifestdict['blockcount'])
uppirlib.populate_xordatastore(manifestdict, myxordatastore, rootdir = _commandlineoptions.rootdir)
bitstring = base64.b64decode(testinfodict['chunklist'])
expectedData = base64.b64decode(testinfodict['data'])
expectedbitstringlength = uppirlib.compute_bitstring_length(myxordatastore.numberofblocks)
if len(bitstring) != expectedbitstringlength:
# Invalid request length...
_log("UPPIR "+remoteip+" "+str(remoteport)+" Invalid request with length: "+str(len(bitstring)))
session.sendmessage(rh.request, 'Invalid request length')
return
mirrorip = testinfodict['ip']
mirrorport = testinfodict['port']
#print "bitstring"+testinfodict['chunklist']+"\n"
xoranswer = myxordatastore.produce_xor_from_bitstring(bitstring)
if xoranswer != expectedData: # or True
session.sendmessage(rh.request, 'TEST: Invalid mirror: '+str(mirrorip)+":"+str(mirrorport))
#print "xor"+base64.b64encode(xoranswer)+"\n"
#print "mir"+base64.b64encode(expectedData)+"\n"
_remove_mirror(mirrorip, mirrorport)
else:
session.sendmessage(rh.request, 'TEST: Correct mirror: '+str(mirrorip)+":"+str(mirrorport))
return
def handle(self):
# read the request from the socket...
requeststring = session.recvmessage(self.request)
# for logging purposes, get the remote info
remoteip, remoteport = self.request.getpeername()
# if it's a request for a XORBLOCK
if requeststring.startswith('XORBLOCK'):
bitstring = requeststring[len('XORBLOCK'):]
expectedbitstringlength = uppirlib.compute_bitstring_length(_global_myxordatastore.numberofblocks)
if len(bitstring) != expectedbitstringlength:
# Invalid request length...
_log("UPPIR "+remoteip+" "+str(remoteport)+" Invalid request with length: "+str(len(bitstring)))
session.sendmessage(self.request, 'Invalid request length')
return
# Now let's process this...
xoranswer = _global_myxordatastore.produce_xor_from_bitstring(bitstring)
# and send the reply.
session.sendmessage(self.request, xoranswer)
_log("UPPIR "+remoteip+" "+str(remoteport)+" GOOD")
# done!
return
elif requeststring == 'HELLO':
# send a reply.
session.sendmessage(self.request, "HI!")
_log("UPPIR "+remoteip+" "+str(remoteport)+" HI!")
# done!
return
else:
# we don't know what this is! Log and tell the requestor
_log("UPPIR "+remoteip+" "+str(remoteport)+" Invalid request type starts:'"+requeststring[:5]+"'")
session.sendmessage(self.request, 'Invalid request type')
return
def handle(self):
# read the request from the socket...
requeststring = session.recvmessage(self.request)
# for logging purposes, get the remote info
remoteip, remoteport = self.request.getpeername()
# if it's a request for a XORBLOCK
if requeststring.startswith('XORBLOCK'):
bitstring = requeststring[len('XORBLOCK'):]
expectedbitstringlength = uppirlib.compute_bitstring_length(_global_myxordatastore.numberofblocks)
if len(bitstring) != expectedbitstringlength:
# Invalid request length...
_log("UPPIR "+remoteip+" "+str(remoteport)+" Invalid request with length: "+str(len(bitstring)))
session.sendmessage(self.request, 'Invalid request length')
return
# Now let's process this...
xoranswer = _global_myxordatastore.produce_xor_from_bitstring(bitstring)
# and send the reply.
session.sendmessage(self.request, xoranswer)
_log("UPPIR "+remoteip+" "+str(remoteport)+" GOOD")
# done!
return
elif requeststring == 'HELLO':
# send a reply.
session.sendmessage(self.request, "HI!")
_log("UPPIR "+remoteip+" "+str(remoteport)+" HI!")
# done!
return
else:
# we don't know what this is! Log and tell the requestor
_log("UPPIR "+remoteip+" "+str(remoteport)+" Invalid request type starts:'"+requeststring[:5]+"'")
session.sendmessage(self.request, 'Invalid request type')
return
def __init__(self, mirrorinfolist, blocklist, manifestdict, privacythreshold, pollinginterval = .1):
"""
<Purpose>
Get ready to handle requests for XOR block strings, etc.
<Arguments>
mirrorinfolist: a list of dictionaries with information about mirrors
blocklist: the blocks that need to be retrieved
manifestdict: the manifest with information about the release
privacythreshold: the number of mirrors that would need to collude to
break privacy
pollinginterval: the amount of time to sleep between checking for
the ability to serve a mirror.
<Exceptions>
TypeError may be raised if invalid parameters are given.
InsufficientMirrors if there are not enough mirrors
"""
self.blocklist = blocklist
self.manifestdict = manifestdict
self.privacythreshold = privacythreshold
self.pollinginterval = pollinginterval
print "-----mirrorinfolist---------------/n prasit"
print mirrorinfolist
print "-----blocklist---------------/nprasit"
print blocklist
print "-----manifestdict---------------/nprasit"
print manifestdict
if len(mirrorinfolist) < self.privacythreshold:
raise InsufficientMirrors("Requested the use of "+str(self.privacythreshold)+" mirrors, but only "+str(len(mirrorinfolist))+" were available.")
# now we do the 'random' part. I copy the mirrorinfolist to avoid changing
# the list in place.
self.fullmirrorinfolist = mirrorinfolist[:]
random.shuffle(self.fullmirrorinfolist)
# let's make a list of mirror information (what has been retrieved, etc.)
self.activemirrorinfolist = []
for mirrorinfo in self.fullmirrorinfolist[:self.privacythreshold]:
thisrequestinfo = {}
thisrequestinfo['mirrorinfo'] = mirrorinfo
thisrequestinfo['servingrequest'] = False
thisrequestinfo['blocksneeded'] = blocklist[:]
thisrequestinfo['blockbitstringlist'] = []
self.activemirrorinfolist.append(thisrequestinfo)
#print manifestdict['blockcount'] #prasit
bitstringlength = uppirlib.compute_bitstring_length(manifestdict['blockcount'])
# let's generate the bitstrings
for thisrequestinfo in self.activemirrorinfolist[:-1]:
for block in blocklist:
# I'll generate random bitstrings for N-1 of the mirrors...
thisrequestinfo['blockbitstringlist'].append(_randomnumberfunction(bitstringlength))
# now, let's do the 'derived' ones...
for blocknum in range(len(blocklist)):
thisbitstring = '\0'*bitstringlength
# xor the random strings together
for requestinfo in self.activemirrorinfolist[:-1]:
thisbitstring = simplexordatastore.do_xor(thisbitstring, requestinfo['blockbitstringlist'][blocknum])
# ...and flip the appropriate bit for the block we want
#print thisbitstring #prasit
thisbitstring = uppirlib.flip_bitstring_bit(thisbitstring, blocklist[blocknum])
#print thisbitstring #prasit
self.activemirrorinfolist[-1]['blockbitstringlist'].append(thisbitstring)
# we're done setting up the bitstrings!
# want to have a structure for locking
self.tablelock = threading.Lock()
# and we'll keep track of the ones that are waiting in the wings...
self.backupmirrorinfolist = self.fullmirrorinfolist[self.privacythreshold:]
# the returned blocks are put here...
self.returnedxorblocksdict = {}
for blocknum in blocklist:
# make these all empty lists to start with
self.returnedxorblocksdict[blocknum] = []
# and here is where they are put when reconstructed
self.finishedblockdict = {}
def __init__(self, mirrorinfolist, blocklist, manifestdict, privacythreshold, pollinginterval = .1):
"""
<Purpose>
Get ready to handle requests for XOR block strings, etc.
<Arguments>
mirrorinfolist: a list of dictionaries with information about mirrors
blocklist: the blocks that need to be retrieved
manifestdict: the manifest with information about the release
privacythreshold: the number of mirrors that would need to collude to
break privacy
pollinginterval: the amount of time to sleep between checking for
the ability to serve a mirror.
<Exceptions>
TypeError may be raised if invalid parameters are given.
InsufficientMirrors if there are not enough mirrors
"""
self.blocklist = blocklist
self.manifestdict = manifestdict
self.privacythreshold = privacythreshold
self.pollinginterval = pollinginterval
if len(mirrorinfolist) < self.privacythreshold:
raise InsufficientMirrors("Requested the use of "+str(self.privacythreshold)+" mirrors, but only "+str(len(mirrorinfolist))+" were available.")
# now we do the 'random' part. I copy the mirrorinfolist to avoid changing
# the list in place.
self.fullmirrorinfolist = mirrorinfolist[:]
random.shuffle(self.fullmirrorinfolist)
# let's make a list of mirror information (what has been retrieved, etc.)
self.activemirrorinfolist = []
for mirrorinfo in self.fullmirrorinfolist[:self.privacythreshold]:
thisrequestinfo = {}
thisrequestinfo['mirrorinfo'] = mirrorinfo
thisrequestinfo['servingrequest'] = False
thisrequestinfo['blocksneeded'] = blocklist[:]
thisrequestinfo['blockbitstringlist'] = []
self.activemirrorinfolist.append(thisrequestinfo)
bitstringlength = uppirlib.compute_bitstring_length(manifestdict['blockcount'])
# let's generate the bitstrings
for thisrequestinfo in self.activemirrorinfolist[:-1]:
for block in blocklist:
# I'll generate random bitstrings for N-1 of the mirrors...
thisrequestinfo['blockbitstringlist'].append(_randomnumberfunction(bitstringlength))
# now, let's do the 'derived' ones...
for blocknum in range(len(blocklist)):
thisbitstring = '\0'*bitstringlength
# xor the random strings together
for requestinfo in self.activemirrorinfolist[:-1]:
thisbitstring = simplexordatastore.do_xor(thisbitstring, requestinfo['blockbitstringlist'][blocknum])
# ...and flip the appropriate bit for the block we want
thisbitstring = uppirlib.flip_bitstring_bit(thisbitstring, blocklist[blocknum])
self.activemirrorinfolist[-1]['blockbitstringlist'].append(thisbitstring)
# we're done setting up the bitstrings!
# want to have a structure for locking
self.tablelock = threading.Lock()
# and we'll keep track of the ones that are waiting in the wings...
self.backupmirrorinfolist = self.fullmirrorinfolist[self.privacythreshold:]
# the returned blocks are put here...
self.returnedxorblocksdict = {}
for blocknum in blocklist:
# make these all empty lists to start with
self.returnedxorblocksdict[blocknum] = []
# and here is where they are put when reconstructed
self.finishedblockdict = {}
