def _expressCustomInterest(self, interestName):
#TODO: make this a form, add timeout field
try:
handled = False
(returnCode,
returnStr) = self.ui.prompt('Send interest',
interestName,
preExtra=[
'--extra-button', '--extra-label',
'Signed', '--ok-label', 'Unsigned'
])
if returnCode == Dialog.DIALOG_ESC or returnCode == Dialog.DIALOG_CANCEL:
self.loop.call_soon(self.expressInterest)
else:
interestName = Name(returnStr)
doSigned = (returnCode == Dialog.DIALOG_EXTRA)
interest = Interest(interestName)
interest.setInterestLifetimeMilliseconds(5000)
interest.setChildSelector(1)
interest.setMustBeFresh(True)
if (doSigned):
self.face.makeCommandInterest(interest)
self.ui.alert(
'Waiting for response to {}'.format(interestName.toUri()),
False)
self.face.expressInterest(interest, self.onDataReceived,
self.onInterestTimeout)
except:
self.loop.call_soon(self.expressInterest)
def reissueInterest(self):
BACKOFF_THRESHOLD = 10
if self.backoffCounter > BACKOFF_THRESHOLD:
self.TIMEOUT += 50
self.backoffCounter = 0
self.logger.debug('Backing off interval to ' + str(self.TIMEOUT))
if self.backoffCounter < -BACKOFF_THRESHOLD:
self.TIMEOUT -= 50
self.backoffCounter = 0
self.logger.debug('Reducing backoff interval to ' + str(self.TIMEOUT))
if self.nextIssue is not None:
now = time.clock()
if self.nextIssue > now:
pass
# time.sleep(self.nextIssue-now)
interest = Interest(Name(self.prefix))
interest.setInterestLifetimeMilliseconds(self.interestLifetime)
interest.setMustBeFresh(False)
if self.lastVersion is not None:
e = Exclude()
e.appendAny()
e.appendComponent(self.lastVersion)
interest.setExclude(e)
interest.setChildSelector(1) #rightmost == freshest
self.face.expressInterest(interest, self.onData, self.onTimeout)
self.nextIssue = time.clock()+self.TIMEOUT/2000
def onDataNotFound(self, prefix, interest, face, interestFilterId, filter):
print "Data not found for interest: " + interest.getName().toUri()
if interest.getName().get(
-3).toEscapedString() == "bout" or interest.getName().get(
-3).toEscapedString() == "genericfunctions":
if interest.getName().toUri() in self.remainingTasks:
# We are already trying to process this task, so we don't add it to the list of tasks
pass
else:
self.remainingTasks[interest.getName().toUri()] = "in-progress"
else:
print "Got unexpected interest: " + interest.getName().toUri()
# .../SAMPLE/<timestamp>
timestamp = interest.getName().get(-1)
catalogInterest = Interest(self.catalogPrefix)
# Traverse catalogs in range from leftmost child
catalogInterest.setChildSelector(0)
catalogInterest.setMustBeFresh(True)
catalogInterest.setInterestLifetimeMilliseconds(4000)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(timestamp)
catalogInterest.setExclude(catalogInterest)
self.face.expressInterest(catalogInterest, self.onCatalogData,
self.onCatalogTimeout)
print "Expressed catalog interest " + catalogInterest.getName().toUri()
return
def main():
interest = Interest()
interest.wireDecode(TlvInterest)
dump("Interest:")
dumpInterest(interest)
encoding = interest.wireEncode()
dump("")
dump("Re-encoded interest", encoding.toHex())
reDecodedInterest = Interest()
reDecodedInterest.wireDecode(encoding)
dump("Re-decoded Interest:")
dumpInterest(reDecodedInterest)
freshInterest = Interest(Name("/ndn/abc"))
freshInterest.setMustBeFresh(False)
dump(freshInterest.toUri())
freshInterest.setMinSuffixComponents(4)
freshInterest.setMaxSuffixComponents(6)
freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST)
freshInterest.getKeyLocator().setKeyData(bytearray(
[0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F]))
freshInterest.getExclude().appendComponent(Name("abc")[0]).appendAny()
freshInterest.setInterestLifetimeMilliseconds(30000)
freshInterest.setChildSelector(1)
freshInterest.setMustBeFresh(True);
freshInterest.setScope(2)
reDecodedFreshInterest = Interest()
reDecodedFreshInterest.wireDecode(freshInterest.wireEncode())
dump("")
dump("Re-decoded fresh Interest:")
dumpInterest(reDecodedFreshInterest)
def main():
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
keyChain = KeyChain()
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
dataPrefix = "/home/test1/data"
repoDataPrefix = "/home/test1/data"
# Set up repo-ng, register prefix for repo-ng's fetch prefix
# Per configuration file in /usr/local/etc/ndn/repo-ng.conf
# memCache is not used for now; repo is hoping that the piece of data in question is still being held at nfd
#memCache = MemoryContentCache(face, 100000)
#memCache.registerPrefix(Name(repoDataPrefix), onRegisterFailed, onDataNotFound)
counter = Counter(face, repoDataPrefix)
interest = Interest(Name(dataPrefix))
interest.setChildSelector(1)
interest.setInterestLifetimeMilliseconds(defaultInterestLifetime)
face.expressInterest(interest, counter.onData, counter.onTimeout)
while True:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(1)
face.shutdown()
def startTrustSchemaUpdate(self, appPrefix, onUpdateSuccess = None, onUpdateFailed = None):
"""
Starts trust schema update for under an application prefix: initial
interest asks for the rightMostChild, and later interests are sent
with previous version excluded. Each verified trust schema will trigger
onUpdateSuccess and update the ConfigPolicyManager for the keyChain
in this instance, and unverified ones will trigger onUpdateFailed.
The keyChain and trust anchor should be set up using setupDefaultIdentityAndRoot
before calling this method.
:param appPrefix: the prefix to ask trust schema for. (interest name: /<prefix>/_schema)
:type appPrefix: Name
:param onUpdateSuccess: (optional) onUpdateSuccess(trustSchemaStr, isInitial) is
called when update succeeds
:type onUpdateSuccess: function object
:param onUpdateFailed: (optional) onUpdateFailed(msg) is called when update fails
:type onUpdateFailed: function object
"""
namespace = appPrefix.toUri()
if namespace in self._trustSchemas:
if self._trustSchemas[namespace]["following"] == True:
print "Already following trust schema under this namespace!"
return
self._trustSchemas[namespace]["following"] = True
else:
self._trustSchemas[namespace] = {"following": True, "version": 0, "is-initial": True}
initialInterest = Interest(Name(namespace).append("_schema"))
initialInterest.setChildSelector(1)
self._face.expressInterest(initialInterest,
lambda interest, data: self.onTrustSchemaData(interest, data, onUpdateSuccess, onUpdateFailed),
lambda interest: self.onTrustSchemaTimeout(interest, onUpdateSuccess, onUpdateFailed))
return
def startPublishingAggregation(self, params, childrenList, dataType, aggregationType):
if __debug__:
print('Start publishing for ' + dataType + '-' + aggregationType)
# aggregation calculating and publishing mechanism
publishingPrefix = Name(self._identityName).append(DATA_COMPONENT).append(dataType).append(AGGREGATION_COMPONENT).append(aggregationType)
self._dataQueue[dataType + aggregationType] = DataQueue(params, childrenList, publishingPrefix)
if len(childrenList.keys()) == 0:
# TODO: make start_time optional for leaf nodes
self._loop.call_later(int(params['producer_interval']), self.calculateAggregation, dataType, aggregationType, childrenList, int(params['start_time']), int(params['producer_interval']), publishingPrefix, True)
else:
# express interest for children who produce the same data and aggregation type
for childName in childrenList.keys():
name = Name(self._identityName).append(childName).append(DATA_COMPONENT).append(dataType).append(AGGREGATION_COMPONENT).append(aggregationType)
interest = Interest(name)
# if start_time is specified, we ask for data starting at start_time;
# if not, we ask for the right most child and go from there
if ('start_time' in childrenList[childName]):
endTime = int(childrenList[childName]['start_time']) + int(childrenList[childName]['producer_interval'])
interest.getName().append(str(childrenList[childName]['start_time'])).append(str(endTime))
else:
# TODO: For now we are playing with historical data, for each run we don't want to miss any data, thus we start with leftMost
interest.setChildSelector(0)
interest.setMustBeFresh(True)
interest.setInterestLifetimeMilliseconds(DEFAULT_INTEREST_LIFETIME)
if __debug__:
print(' Issue interest: ' + interest.getName().toUri())
self._face.expressInterest(interest, self.onData, self.onTimeout)
return
def onCatalogData(self, interest, data):
# Find the next catalog
print "Received catalog data " + data.getName().toUri()
catalogTimestamp = data.getName().get(-2)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(catalogTimestamp)
nextCatalogInterest = Interest(interest.getName())
nextCatalogInterest.setExclude(exclude)
nextCatalogInterest.setChildSelector(0)
nextCatalogInterest.setMustBeFresh(True)
nextCatalogInterest.setInterestLifetimeMilliseconds(2000)
self.face.expressInterest(nextCatalogInterest, self.onCatalogData,
self.onCatalogTimeout)
print "Expressed catalog interest " + nextCatalogInterest.getName(
).toUri()
# We ignore the version in the catalog
if self.encrypted:
self.consumer.consume(contentName, self.onCatalogConsumeComplete,
self.onConsumeFailed)
else:
self.onCatalogConsumeComplete(data, data.getContent())
def main():
interest = Interest()
interest.wireDecode(TlvInterest)
dump("Interest:")
dumpInterest(interest)
# Set the name again to clear the cached encoding so we encode again.
interest.setName(interest.getName())
encoding = interest.wireEncode()
dump("")
dump("Re-encoded interest", encoding.toHex())
reDecodedInterest = Interest()
reDecodedInterest.wireDecode(encoding)
dump("Re-decoded Interest:")
dumpInterest(reDecodedInterest)
freshInterest = Interest(Name("/ndn/abc"))
freshInterest.setMustBeFresh(False)
dump(freshInterest.toUri())
freshInterest.setMinSuffixComponents(4)
freshInterest.setMaxSuffixComponents(6)
freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST)
freshInterest.getKeyLocator().setKeyData(bytearray(
[0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F]))
freshInterest.getExclude().appendComponent(Name("abc")[0]).appendAny()
freshInterest.setInterestLifetimeMilliseconds(30000)
freshInterest.setChildSelector(1)
freshInterest.setMustBeFresh(True);
freshInterest.setScope(2)
identityStorage = MemoryIdentityStorage()
privateKeyStorage = MemoryPrivateKeyStorage()
keyChain = KeyChain(IdentityManager(identityStorage, privateKeyStorage),
SelfVerifyPolicyManager(identityStorage))
# Initialize the storage.
keyName = Name("/testname/DSK-123")
certificateName = keyName.getSubName(0, keyName.size() - 1).append(
"KEY").append(keyName[-1]).append("ID-CERT").append("0")
identityStorage.addKey(keyName, KeyType.RSA, Blob(DEFAULT_RSA_PUBLIC_KEY_DER))
privateKeyStorage.setKeyPairForKeyName(
keyName, KeyType.RSA, DEFAULT_RSA_PUBLIC_KEY_DER, DEFAULT_RSA_PRIVATE_KEY_DER)
# Make a Face just so that we can sign the interest.
face = Face("localhost")
face.setCommandSigningInfo(keyChain, certificateName)
face.makeCommandInterest(freshInterest)
reDecodedFreshInterest = Interest()
reDecodedFreshInterest.wireDecode(freshInterest.wireEncode())
dump("")
dump("Re-decoded fresh Interest:")
dumpInterest(reDecodedFreshInterest)
keyChain.verifyInterest(
reDecodedFreshInterest, makeOnVerified("Freshly-signed Interest"),
makeOnVerifyFailed("Freshly-signed Interest"))
def test_set_removes_nonce(self):
# ensure that setting a value on an interest clears the nonce
self.assertFalse(self.referenceInterest.getNonce().isNull())
interest = Interest(self.referenceInterest)
interest.setChildSelector(0)
self.assertTrue(
interest.getNonce().isNull(),
'Interest should not have a nonce after changing fields')
def onData(self, interest, data):
self._keyChain.verifyData(data, self.onVerified, self.onVerifyFailed)
dataName = data.getName()
dataQueue = None
if __debug__:
print("Got data: " + dataName.toUri() + "; " +
data.getContent().toRawStr())
for i in range(0, len(dataName)):
if dataName.get(i).toEscapedString() == AGGREGATION_COMPONENT:
dataType = dataName.get(i - 1).toEscapedString()
aggregationType = dataName.get(i + 1).toEscapedString()
startTime = int(dataName.get(i + 2).toEscapedString())
endTime = int(dataName.get(i + 3).toEscapedString())
childName = dataName.get(i - 3).toEscapedString()
dataAndAggregationType = dataType + aggregationType
dataDictKey = self.getDataDictKey(startTime, endTime,
childName)
dataQueue = self._dataQueue[dataAndAggregationType]
dataQueue._dataDict[dataDictKey] = data
break
# TODO: check what if interval/starttime is misconfigured
if dataQueue:
self.calculateAggregation(dataType, aggregationType,
dataQueue._childrenList, startTime,
endTime - startTime,
dataQueue._publishingPrefix)
# Always ask for the next piece of data when we receive this one; assumes interval does not change; this also assumes there are no more components after endTime
#newInterestName = dataName.getPrefix(i + 2).append(str(endTime)).append(str(endTime + (endTime - startTime)))
# We don't expect aggregated data name to be continuous within our given time window, so we ask with exclusion instead
newInterestName = dataName.getPrefix(i + 2)
newInterest = Interest(interest)
newInterest.setName(newInterestName)
newInterest.setChildSelector(0)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(dataName.get(i + 2))
newInterest.setExclude(exclude)
self._face.expressInterest(newInterest, self.onData, self.onTimeout)
if __debug__:
print(" issue interest: " + interest.getName().toUri())
return
def createFreshInterest():
freshInterest = Interest(Name("/ndn/abc"))
freshInterest.setMustBeFresh(False)
freshInterest.setMinSuffixComponents(4)
freshInterest.setMaxSuffixComponents(6)
freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST)
freshInterest.getKeyLocator().setKeyData(bytearray(
[0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F]))
freshInterest.getExclude().appendComponent(Name("abc")[0]).appendAny()
freshInterest.setInterestLifetimeMilliseconds(30000)
freshInterest.setChildSelector(1)
freshInterest.setMustBeFresh(True);
freshInterest.setScope(2)
return freshInterest
def startPublishingAggregation(self, params, childrenList, dataType,
aggregationType):
if __debug__:
print('Start publishing for ' + dataType + '-' + aggregationType)
# aggregation calculating and publishing mechanism
publishingPrefix = Name(
self._identityName).append(DATA_COMPONENT).append(dataType).append(
AGGREGATION_COMPONENT).append(aggregationType)
self._dataQueue[dataType + aggregationType] = DataQueue(
params, childrenList, publishingPrefix)
if len(childrenList.keys()) == 0:
# TODO: make start_time optional for leaf nodes
self._loop.call_later(int(params['producer_interval']),
self.calculateAggregation, dataType,
aggregationType, childrenList,
int(params['start_time']),
int(params['producer_interval']),
publishingPrefix, True)
else:
# express interest for children who produce the same data and aggregation type
for childName in childrenList.keys():
name = Name(self._identityName).append(childName).append(
DATA_COMPONENT).append(dataType).append(
AGGREGATION_COMPONENT).append(aggregationType)
interest = Interest(name)
# if start_time is specified, we ask for data starting at start_time;
# if not, we ask for the right most child and go from there
if ('start_time' in childrenList[childName]):
endTime = int(childrenList[childName]['start_time']) + int(
childrenList[childName]['producer_interval'])
interest.getName().append(
str(childrenList[childName]['start_time'])).append(
str(endTime))
else:
# TODO: For now we are playing with historical data, for each run we don't want to miss any data, thus we start with leftMost
interest.setChildSelector(0)
interest.setMustBeFresh(True)
interest.setInterestLifetimeMilliseconds(
DEFAULT_INTEREST_LIFETIME)
if __debug__:
print(' Issue interest: ' + interest.getName().toUri())
self._face.expressInterest(interest, self.onData,
self.onTimeout)
return
def onData(self, interest, data):
self._keyChain.verifyData(data, self.onVerified, self.onVerifyFailed)
dataName = data.getName()
dataQueue = None
if __debug__:
print("Got data: " + dataName.toUri() + "; " + data.getContent().toRawStr())
for i in range(0, len(dataName)):
if dataName.get(i).toEscapedString() == AGGREGATION_COMPONENT:
dataType = dataName.get(i - 1).toEscapedString()
aggregationType = dataName.get(i + 1).toEscapedString()
startTime = int(dataName.get(i + 2).toEscapedString())
endTime = int(dataName.get(i + 3).toEscapedString())
childName = dataName.get(i - 3).toEscapedString()
dataAndAggregationType = dataType + aggregationType
dataDictKey = self.getDataDictKey(startTime, endTime, childName)
dataQueue = self._dataQueue[dataAndAggregationType]
dataQueue._dataDict[dataDictKey] = data
break
# TODO: check what if interval/starttime is misconfigured
if dataQueue:
self.calculateAggregation(dataType, aggregationType, dataQueue._childrenList, startTime, endTime - startTime, dataQueue._publishingPrefix)
# Always ask for the next piece of data when we receive this one; assumes interval does not change; this also assumes there are no more components after endTime
#newInterestName = dataName.getPrefix(i + 2).append(str(endTime)).append(str(endTime + (endTime - startTime)))
# We don't expect aggregated data name to be continuous within our given time window, so we ask with exclusion instead
newInterestName = dataName.getPrefix(i + 2)
newInterest = Interest(interest)
newInterest.setName(newInterestName)
newInterest.setChildSelector(0)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(dataName.get(i + 2))
newInterest.setExclude(exclude)
self._face.expressInterest(newInterest, self.onData, self.onTimeout)
if __debug__:
print(" issue interest: " + interest.getName().toUri())
return
def expressInterest(self):
try:
interestName = input('Interest name: ')
if len(interestName):
toSign = input('Signed? (y/N): ').upper().startswith('Y')
interest = Interest(Name(interestName))
interest.setInterestLifetimeMilliseconds(5000)
interest.setChildSelector(1)
if (toSign):
self.face.makeCommandInterest(interest)
self.face.expressInterest(interest, self.onDataReceived, self.onInterestTimeout)
else:
print("Aborted")
except KeyboardInterrupt:
print("Aborted")
finally:
self.loop.call_soon(self.displayMenu)
def onSchemaVerified(self, data, onUpdateSuccess, onUpdateFailed):
print "trust schema verified: " + data.getName().toUri()
version = data.getName().get(-1)
namespace = data.getName().getPrefix(-2).toUri()
if not (namespace in self._trustSchemas):
print "unexpected: received trust schema for application namespace that's not being followed; malformed data name?"
return
if version.toVersion() <= self._trustSchemas[namespace]["version"]:
msg = "Got out-of-date trust schema"
print msg
if onUpdateFailed:
onUpdateFailed(msg)
return
self._trustSchemas[namespace]["version"] = version.toVersion()
if "pending-schema" in self._trustSchemas[namespace] and self._trustSchemas[namespace]["pending-schema"].getName().toUri() == data.getName().toUri():
# we verified a pending trust schema, don't need to keep that any more
del self._trustSchemas[namespace]["pending-schema"]
self._trustSchemas[namespace]["trust-schema"] = data.getContent().toRawStr()
print self._trustSchemas[namespace]["trust-schema"]
# TODO: what about trust schema for discovery, is discovery its own application?
newInterest = Interest(Name(data.getName()).getPrefix(-1))
newInterest.setChildSelector(1)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(version)
newInterest.setExclude(exclude)
self._face.expressInterest(newInterest,
lambda interest, data: self.onTrustSchemaData(interest, data, onUpdateSuccess, onUpdateFailed),
lambda interest: self.onTrustSchemaTimeout(interest, onUpdateSuccess, onUpdateFailed))
# Note: this changes the verification rules for root cert, future trust schemas as well; ideally from the outside this doesn't have an impact, but do we want to avoid this?
# Per reset function in ConfigPolicyManager; For now we don't call reset as we still want root cert in our certCache, instead of asking for it again (when we want to verify) each time we update the trust schema
self._policyManager.config = BoostInfoParser()
self._policyManager.config.read(self._trustSchemas[namespace]["trust-schema"], "updated-schema")
if onUpdateSuccess:
onUpdateSuccess(data.getContent().toRawStr(), self._trustSchemas[namespace]["is-initial"])
self._trustSchemas[namespace]["is-initial"] = False
return
def expressInterest(self):
try:
interestName = input('Interest name: ')
if len(interestName):
toSign = input('Signed? (y/N): ').upper().startswith('Y')
interest = Interest(Name(interestName))
print(interest)
interest.setInterestLifetimeMilliseconds(10000)
interest.setChildSelector(1)
if (toSign):
self.face.makeCommandInterest(interest)
self.face.expressInterest(interest, self.onDataReceived,
self.onInterestTimeout)
else:
print("Aborted")
except KeyboardInterrupt:
print("Aborted")
finally:
self.loop.call_soon(self.displayMenu)
def onSchemaVerificationFailed(self, data, reason, onUpdateSuccess, onUpdateFailed):
print "trust schema verification failed: " + reason
namespace = data.getName().getPrefix(-2).toUri()
if not (namespace in self._trustSchemas):
print "unexpected: received trust schema for application namespace that's not being followed; malformed data name?"
return
newInterest = Interest(Name(data.getName()).getPrefix(-1))
newInterest.setChildSelector(1)
exclude = Exclude()
exclude.appendAny()
exclude.appendComponent(Name.Component.fromVersion(self._trustSchemas[namespace]["version"]))
newInterest.setExclude(exclude)
# Don't immediately ask for potentially the same content again if verification fails
self._face.callLater(4000, lambda :
self._face.expressInterest(newInterest,
lambda interest, data: self.onTrustSchemaData(interest, data, onUpdateSuccess, onUpdateFailed),
lambda interest: self.onTrustSchemaTimeout(interest, onUpdateSuccess, onUpdateFailed)))
return
def expressInterestPirAndRepeat(self):
self.log.debug("callbackCountUniqueData: " + str(self._callbackCountUniqueData) + ", callbackCountTimeout: " + str(self._callbackCountTimeout))
# Express interest for each pir we have discovered
for pir in self.getPirs():
interest = Interest(Name(pir.id))
interest.setExclude(pir.status.getExclude())
interest.setInterestLifetimeMilliseconds(1000.0)
interest.setChildSelector(1)
self.face.expressInterest(interest, self.onDataPir, self.onTimeoutPir)
self._countExpressedInterests += 1
debugStr = "Sent interest: " + interest.getName().toUri()
debugStr += "\tExclude: " + interest.getExclude().toUri()
debugStr += "\tLifetime: " + str(interest.getInterestLifetimeMilliseconds())
self.log.debug(debugStr)
# Reschedule again in 0.5 sec
self.loop.call_later(1.0, self.expressInterestPirAndRepeat)
def createFreshInterest():
freshInterest = Interest(Name("/ndn/abc"))
freshInterest.setMustBeFresh(False)
freshInterest.setMinSuffixComponents(4)
freshInterest.setMaxSuffixComponents(6)
freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST)
freshInterest.getKeyLocator().setKeyData(
bytearray([
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F
]))
freshInterest.getExclude().appendComponent(Name("abc")[0]).appendAny()
freshInterest.setInterestLifetimeMilliseconds(30000)
freshInterest.setChildSelector(1)
freshInterest.setMustBeFresh(True)
freshInterest.setScope(2)
return freshInterest
def handleCommandInterests(self, prefix, interest, transport, prefixId):
# TODO: verification
interestName = interest.getName()
if len(interestName) <= len(prefix)+4:
self.log.info("Bad command interest")
commandName = str(interestName[len(prefix)].getValue())
responseMessage = RepoCommandResponseMessage()
if commandName == 'insert':
commandParams = interestName[len(prefix)+1].getValue()
commandMessage = RepoCommandParameterMessage()
ProtobufTlv.decode(commandMessage, commandParams)
dataName = Name()
fullSchemaName = Name()
for component in commandMessage.command.name.components:
fullSchemaName.append(component)
if component == '_':
continue
dataName.append(component)
self.log.info("Insert request for {}".format(dataName))
responseMessage.response.status_code = 100
processId = self.currentProcessId
self.currentProcessId += 1
responseMessage.response.process_id = processId
else:
responseMessage.response.status_code = 403
responseData = Data(interestName)
responseData.setContent(ProtobufTlv.encode(responseMessage))
transport.send(responseData.wireEncode().buf())
# now send the interest out to the publisher
# TODO: pendingProcesses becomes list of all processes as objects
i = Interest(dataName)
i.setChildSelector(1)
i.setInterestLifetimeMilliseconds(4000)
try:
self.pendingProcesses[processId] = (dataName, 100)
except NameError:
pass # wasn't valid insert request
else:
self._insertFace.expressInterest(i,
self._onInsertionDataReceived,
self._onInsertionDataTimeout)
def _onContentSet(self, namespace, contentNamespace, callbackId):
if not (len(contentNamespace.name) >= len(self._namespace.name) + 1 and
contentNamespace.name[len(self._namespace.name)].isSegment()):
# Not a segment, ignore.
return
# TODO: Use the Namspace mechanism to validate the Data packet.
metaInfo = contentNamespace.data.metaInfo
if (metaInfo.getFinalBlockId().getValue().size() > 0 and
metaInfo.getFinalBlockId().isSegment()):
self._finalSegmentNumber = metaInfo.getFinalBlockId().toSegment()
# Report as many segments as possible where the node already has content.
while True:
nextSegmentNumber = self._maxRetrievedSegmentNumber + 1
nextSegment = self.debugGetRightmostLeaf(
self._namespace[Name.Component.fromSegment(nextSegmentNumber)])
if nextSegment.content.isNull():
break
self._maxRetrievedSegmentNumber = nextSegmentNumber
self._fireOnSegment(nextSegment)
if (self._finalSegmentNumber != None and
nextSegmentNumber == self._finalSegmentNumber):
# Finished.
self._fireOnSegment(None)
return
if self._finalSegmentNumber == None and not self._didRequestFinalSegment:
self._didRequestFinalSegment = True
# Try to determine the final segment now.
interestTemplate = Interest()
interestTemplate.setInterestLifetimeMilliseconds(4000)
interestTemplate.setChildSelector(1)
self._namespace.expressInterest(interestTemplate)
self._requestNewSegments(self._interestPipelineSize)
def main():
interest = Interest()
interest.wireDecode(TlvInterest)
dump("Interest:")
dumpInterest(interest)
encoding = interest.wireEncode()
dump("")
dump("Re-encoded interest", encoding.toHex())
reDecodedInterest = Interest()
reDecodedInterest.wireDecode(encoding)
dump("Re-decoded Interest:")
dumpInterest(reDecodedInterest)
freshInterest = Interest(Name("/ndn/abc"))
freshInterest.setMustBeFresh(False)
dump(freshInterest.toUri())
freshInterest.setMinSuffixComponents(4)
freshInterest.setMaxSuffixComponents(6)
freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST)
freshInterest.getKeyLocator().setKeyData(
bytearray([
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F
]))
freshInterest.getExclude().appendComponent(Name("abc")[0]).appendAny()
freshInterest.setInterestLifetimeMilliseconds(30000)
freshInterest.setChildSelector(1)
freshInterest.setMustBeFresh(True)
freshInterest.setScope(2)
reDecodedFreshInterest = Interest()
reDecodedFreshInterest.wireDecode(freshInterest.wireEncode())
dump("")
dump("Re-decoded fresh Interest:")
dumpInterest(reDecodedFreshInterest)
def _expressCustomInterest(self, interestName):
# TODO: make this a form, add timeout field
try:
handled = False
(returnCode, returnStr) = self.ui.prompt(
"Send interest",
interestName,
preExtra=["--extra-button", "--extra-label", "Signed", "--ok-label", "Unsigned"],
)
if returnCode == Dialog.DIALOG_ESC or returnCode == Dialog.DIALOG_CANCEL:
self.loop.call_soon(self.expressInterest)
else:
interestName = Name(returnStr)
doSigned = returnCode == Dialog.DIALOG_EXTRA
interest = Interest(interestName)
interest.setInterestLifetimeMilliseconds(5000)
interest.setChildSelector(1)
interest.setMustBeFresh(True)
if doSigned:
self.face.makeCommandInterest(interest)
self.ui.alert("Waiting for response to {}".format(interestName.toUri()), False)
self.face.expressInterest(interest, self.onDataReceived, self.onInterestTimeout)
except:
self.loop.call_soon(self.expressInterest)
def test_set_removes_nonce(self):
# ensure that setting a value on an interest clears the nonce
self.assertFalse(self.referenceInterest.getNonce().isNull())
interest = Interest(self.referenceInterest)
interest.setChildSelector(0)
self.assertTrue(interest.getNonce().isNull(), 'Interest should not have a nonce after changing fields')
def _onContentSet(self, namespace, contentNamespace, callbackId):
if not (len(contentNamespace.name) >= len(self._namespace.name) + 1 and
contentNamespace.name[len(self._namespace.name)].isSegment()):
# Not a segment, ignore.
# Debug: If this is the first call, we still need to request segments.
return
# TODO: Use the Namspace mechanism to validate the Data packet.
metaInfo = contentNamespace.data.metaInfo
if (metaInfo.getFinalBlockId().getValue().size() > 0 and
metaInfo.getFinalBlockId().isSegment()):
self._finalSegmentNumber = metaInfo.getFinalBlockId().toSegment()
# Retrieve as many segments as possible from the store.
while True:
nextSegmentNumber = self._maxRetrievedSegmentNumber + 1
nextSegment = self.debugGetRightmostLeaf(
self._namespace[Name.Component.fromSegment(nextSegmentNumber)])
if nextSegment.content == None:
break
self._maxRetrievedSegmentNumber = nextSegmentNumber
self._fireOnSegment(nextSegment)
if (self._finalSegmentNumber != None and
nextSegmentNumber == self._finalSegmentNumber):
# Finished.
self._fireOnSegment(None)
return
if self._finalSegmentNumber == None and not self._didRequestFinalSegment:
self._didRequestFinalSegment = True
# Try to determine the final segment now.
interestTemplate = Interest()
interestTemplate.setInterestLifetimeMilliseconds(4000)
interestTemplate.setChildSelector(1)
self._namespace.expressInterest(interestTemplate)
# Request new segments.
childComponents = self._namespace.getChildComponents()
# First, count how many are already requested and not received.
nRequestedSegments = 0
for component in childComponents:
if not component.isSegment():
# The namespace contains a child other than a segment. Ignore.
continue
child = self._namespace[component]
# Debug: Check the leaf for content, but use the immediate child
# for _debugSegmentStreamDidExpressInterest.
if (self.debugGetRightmostLeaf(child).content == None and
hasattr(child, '_debugSegmentStreamDidExpressInterest') and
child._debugSegmentStreamDidExpressInterest):
nRequestedSegments += 1
if nRequestedSegments >= self._interestPipelineSize:
# Already maxed out on requests.
break
# Now find unrequested segment numbers and request.
segmentNumber = self._maxRetrievedSegmentNumber
while nRequestedSegments < self._interestPipelineSize:
segmentNumber += 1
if (self._finalSegmentNumber != None and
segmentNumber > self._finalSegmentNumber):
break
segment = self._namespace[Name.Component.fromSegment(segmentNumber)]
if (self.debugGetRightmostLeaf(segment).content != None or
(hasattr(segment, '_debugSegmentStreamDidExpressInterest') and
segment._debugSegmentStreamDidExpressInterest)):
# Already got the data packet or already requested.
continue
nRequestedSegments += 1
segment._debugSegmentStreamDidExpressInterest = True
segment.expressInterest()
