def _processRecoveryInterest(self, interest, syncDigest, transport):
logging.getLogger(__name__).info("processRecoveryInterest")
if self._logFind(syncDigest) != -1:
tempContent = sync_state_pb2.SyncStateMsg()
for i in range(self._digestTree.size()):
content = getattr(tempContent, "ss").add()
content.name = self._applicationDataPrefixUri
content.type = SyncState_UPDATE
content.seqno.seq = self._sequenceNo
content.seqno.session = self._digestTree.get(i).getSessionNo()
if len(getattr(tempContent, "ss")) != 0:
# TODO: Check if this works in Python 3.
#pylint: disable=E1103
array = tempContent.SerializeToString()
#pylint: enable=E1103
data = Data(interest.getName())
data.setContent(Blob(array))
self._keyChain.sign(data, self._certificateName)
try:
transport.send(data.wireEncode().toBuffer())
except Exception as ex:
logging.getLogger(__name__).error(
"Error in transport.send: %s", str(ex))
return
logging.getLogger(__name__).info("send recovery data back")
logging.getLogger(__name__).info("%s", interest.getName().toUri())
def _processRecoveryInterest(self, interest, syncDigest, face):
logging.getLogger(__name__).info("processRecoveryInterest")
if self._logFind(syncDigest) != -1:
tempContent = SyncStateMsg()
for i in range(self._digestTree.size()):
content = getattr(tempContent, "ss").add()
content.name = self._digestTree.get(i).getDataPrefix()
content.type = SyncState_UPDATE
content.seqno.seq = self._digestTree.get(i).getSequenceNo()
content.seqno.session = self._digestTree.get(i).getSessionNo()
if len(getattr(tempContent, "ss")) != 0:
# TODO: Check if this works in Python 3.
#pylint: disable=E1103
array = tempContent.SerializeToString()
#pylint: enable=E1103
data = Data(interest.getName())
data.setContent(Blob(array))
if interest.getName().get(-1).toEscapedString() == "00":
# Limit the lifetime of replies to interest for "00" since
# they can be different.
data.getMetaInfo().setFreshnessPeriod(1000)
self._keyChain.sign(data, self._certificateName)
try:
face.putData(data)
except Exception as ex:
logging.getLogger(__name__).error(
"Error in face.putData: %s", str(ex))
return
logging.getLogger(__name__).info("send recovery data back")
logging.getLogger(__name__).info("%s",
interest.getName().toUri())
def _processRecoveryInterest(self, interest, syncDigest, face):
logging.getLogger(__name__).info("processRecoveryInterest")
if self._logFind(syncDigest) != -1:
tempContent = SyncStateMsg()
for i in range(self._digestTree.size()):
content = getattr(tempContent, "ss").add()
content.name = self._digestTree.get(i).getDataPrefix()
content.type = SyncState_UPDATE
content.seqno.seq = self._digestTree.get(i).getSequenceNo()
content.seqno.session = self._digestTree.get(i).getSessionNo()
if len(getattr(tempContent, "ss")) != 0:
# TODO: Check if this works in Python 3.
#pylint: disable=E1103
array = tempContent.SerializeToString()
#pylint: enable=E1103
data = Data(interest.getName())
data.setContent(Blob(array))
if interest.getName().get(-1).toEscapedString() == "00":
# Limit the lifetime of replies to interest for "00" since
# they can be different.
data.getMetaInfo().setFreshnessPeriod(1000)
self._keyChain.sign(data, self._certificateName)
try:
face.putData(data)
except Exception as ex:
logging.getLogger(__name__).error(
"Error in face.putData: %s", str(ex))
return
logging.getLogger(__name__).info("send recovery data back")
logging.getLogger(__name__).info("%s", interest.getName().toUri())
def _registerPrefixHelper(self, registeredPrefixId, prefix, onInterest,
onRegisterFailed, flags, wireFormat):
"""
Do the work of registerPrefix to register with NDNx once we have an
ndndId_.
:param int registeredPrefixId: The
_RegisteredPrefix.getNextRegisteredPrefixId() which registerPrefix got
so it could return it to the caller. If this is 0, then don't add to
registeredPrefixTable_ (assuming it has already been done).
"""
# Create a ForwardingEntry.
# Note: ndnd ignores any freshness that is larger than 3600 seconds and
# sets 300 seconds instead. To register "forever", (=2000000000 sec),
# the freshness period must be omitted.
forwardingEntry = ForwardingEntry()
forwardingEntry.setAction("selfreg")
forwardingEntry.setPrefix(prefix)
forwardingEntry.setForwardingFlags(flags)
content = forwardingEntry.wireEncode(wireFormat)
# Set the ForwardingEntry as the content of a Data packet and sign.
data = Data()
data.setContent(content)
# Set the name to a random value so that each request is unique.
nonce = bytearray(4)
for i in range(len(nonce)):
nonce[i] = _systemRandom.randint(0, 0xff)
data.getName().append(nonce)
# The ndnd ignores the signature, so set to blank values.
data.getSignature().getKeyLocator().setType(
KeyLocatorType.KEY_LOCATOR_DIGEST)
data.getSignature().getKeyLocator().setKeyData(
Blob(bytearray(32), False))
data.getSignature().setSignature(Blob(bytearray(128), False))
encodedData = data.wireEncode(wireFormat)
# Create an interest where the name has the encoded Data packet.
interestName = Name().append("ndnx").append(
self._ndndId).append("selfreg").append(encodedData)
interest = Interest(interestName)
interest.setInterestLifetimeMilliseconds(4000.0)
interest.setScope(1)
encodedInterest = interest.wireEncode(wireFormat)
if registeredPrefixId != 0:
# Save the onInterest callback and send the registration interest.
self._registeredPrefixTable.append(
Node._RegisteredPrefix(registeredPrefixId, prefix, onInterest))
response = Node._RegisterResponse(self, prefix, onInterest,
onRegisterFailed, flags, wireFormat,
False)
self.expressInterest(interest, response.onData, response.onTimeout,
wireFormat)
def _registerPrefixHelper(
self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
wireFormat):
"""
Do the work of registerPrefix to register with NDNx once we have an
_ndndId.
:param int registeredPrefixId: The
_RegisteredPrefix.getNextRegisteredPrefixId() which registerPrefix got
so it could return it to the caller. If this is 0, then don't add to
_registeredPrefixTable (assuming it has already been done).
"""
# Create a ForwardingEntry.
# Note: ndnd ignores any freshness that is larger than 3600 seconds and
# sets 300 seconds instead. To register "forever", (=2000000000 sec),
# the freshness period must be omitted.
forwardingEntry = ForwardingEntry()
forwardingEntry.setAction("selfreg")
forwardingEntry.setPrefix(prefix)
forwardingEntry.setForwardingFlags(flags)
content = forwardingEntry.wireEncode(wireFormat)
# Set the ForwardingEntry as the content of a Data packet and sign.
data = Data()
data.setContent(content)
# Set the name to a random value so that each request is unique.
nonce = bytearray(4)
for i in range(len(nonce)):
nonce[i] = _systemRandom.randint(0, 0xff)
data.getName().append(nonce)
# The ndnd ignores the signature, so set to blank values.
data.getSignature().getKeyLocator().setType(
KeyLocatorType.KEY_LOCATOR_DIGEST)
data.getSignature().getKeyLocator().setKeyData(
Blob(bytearray(32), False))
data.getSignature().setSignature(Blob(bytearray(128), False))
encodedData = data.wireEncode(wireFormat)
# Create an interest where the name has the encoded Data packet.
interestName = Name().append("ndnx").append(self._ndndId).append(
"selfreg").append(encodedData)
interest = Interest(interestName)
interest.setInterestLifetimeMilliseconds(4000.0)
interest.setScope(1)
encodedInterest = interest.wireEncode(wireFormat)
if registeredPrefixId != 0:
# Save the onInterest callback and send the registration interest.
self._registeredPrefixTable.append(Node._RegisteredPrefix(
registeredPrefixId, prefix, onInterest))
response = Node._RegisterResponse(
self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False)
self.expressInterest(
interest, response.onData, response.onTimeout, wireFormat)
def addMember(self, memberCertificate):
"""
Authorize a member identified by memberCertificate to decrypt data under
the policy.
:param CertificateV2 memberCertificate: The certificate that identifies
the member to authorize.
:return: The published KDK Data packet.
:rtype: Data
"""
kdkName = Name(self._nacKey.getIdentityName())
kdkName.append(EncryptorV2.NAME_COMPONENT_KDK).append(
# key-id
self._nacKey.getName().get(-1)).append(
EncryptorV2.NAME_COMPONENT_ENCRYPTED_BY).append(
memberCertificate.getKeyName())
secretLength = 32
secret = bytearray(secretLength)
for i in range(secretLength):
secret[i] = _systemRandom.randint(0, 0xff)
# To be compatible with OpenSSL which uses a null-terminated string,
# replace each 0 with 1. And to be compatible with the Java security
# library which interprets the secret as a char array converted to UTF8,
# limit each byte to the ASCII range 1 to 127.
for i in range(secretLength):
if secret[i] == 0:
secret[i] = 1
secret[i] &= 0x7f
kdkSafeBag = self._keyChain.exportSafeBag(
self._nacKey.getDefaultCertificate(),
Blob(secret, False).toBytes())
memberKey = PublicKey(memberCertificate.getPublicKey())
encryptedContent = EncryptedContent()
encryptedContent.setPayload(kdkSafeBag.wireEncode())
encryptedContent.setPayloadKey(
memberKey.encrypt(
Blob(secret, False).toBytes(), EncryptAlgorithmType.RsaOaep))
kdkData = Data(kdkName)
kdkData.setContent(encryptedContent.wireEncodeV2())
# FreshnessPeriod can serve as a soft access control for revoking access.
kdkData.getMetaInfo().setFreshnessPeriod(
AccessManagerV2.DEFAULT_KDK_FRESHNESS_PERIOD_MS)
self._keyChain.sign(kdkData, SigningInfo(self._identity))
self._storage.insert(kdkData)
return kdkData
def _broadcastSyncState(self, digest, syncMessage):
"""
Make a data packet with the syncMessage and with name
applicationBroadcastPrefix_ + digest. Sign and send.
:param str digest: The root digest as a hex string for the data packet
name.
:param sync_state_pb2.SyncState syncMessage:
"""
data = Data(self._applicationBroadcastPrefix)
data.getName().append(digest)
# TODO: Check if this works in Python 3.
data.setContent(Blob(syncMessage.SerializeToString()))
self._keyChain.sign(data, self._certificateName)
self._contentCache.add(data)
def _broadcastSyncState(self, digest, syncMessage):
"""
Make a data packet with the syncMessage and with name
applicationBroadcastPrefix_ + digest. Sign and send.
:param str digest: The root digest as a hex string for the data packet
name.
:param sync_state_pb2.SyncState syncMessage:
"""
data = Data(self._applicationBroadcastPrefix)
data.getName().append(digest)
# TODO: Check if this works in Python 3.
data.setContent(Blob(syncMessage.SerializeToString()))
self._keyChain.sign(data, self._certificateName)
self._contentCache.add(data)
def _createEKeyData(self, startTimeStamp, endTimeStamp, publicKeyBlob):
"""
Create an E-KEY Data packet for the given public key.
:param str startTimeStamp: The start time stamp string to put in the name.
:param str endTimeStamp: The end time stamp string to put in the name.
:param Blob publicKeyBlob: A Blob of the public key DER.
:return: The Data packet.
:rtype: Data
"""
name = Name(self._namespace)
name.append(Encryptor.NAME_COMPONENT_E_KEY).append(startTimeStamp).append(endTimeStamp)
data = Data(name)
data.getMetaInfo().setFreshnessPeriod(self._freshnessHours * GroupManager.MILLISECONDS_IN_HOUR)
data.setContent(publicKeyBlob)
self._keyChain.sign(data)
return data
def _createEKeyData(self, startTimeStamp, endTimeStamp, publicKeyBlob):
"""
Create an E-KEY Data packet for the given public key.
:param str startTimeStamp: The start time stamp string to put in the name.
:param str endTimeStamp: The end time stamp string to put in the name.
:param Blob publicKeyBlob: A Blob of the public key DER.
:return: The Data packet.
:rtype: Data
"""
name = Name(self._namespace)
name.append(Encryptor.NAME_COMPONENT_E_KEY).append(
startTimeStamp).append(endTimeStamp)
data = Data(name)
data.getMetaInfo().setFreshnessPeriod(
self._freshnessHours * GroupManager.MILLISECONDS_IN_HOUR)
data.setContent(publicKeyBlob)
self._keyChain.sign(data)
return data
def _makeAndPublishCkData(self, onError):
"""
Make a CK Data packet for _ckName encrypted by the KEK in _kekData and
insert it in the _storage.
:param onError: On failure, this calls onError(errorCode, message) where
errorCode is from EncryptError.ErrorCode, and message is an error
string.
:type onError: function object
:return: True on success, else False.
:rtype: bool
"""
try:
kek = PublicKey(self._kekData.getContent())
content = EncryptedContent()
content.setPayload(
kek.encrypt(Blob(self._ckBits, False),
EncryptAlgorithmType.RsaOaep))
ckData = Data(
Name(self._ckName).append(
EncryptorV2.NAME_COMPONENT_ENCRYPTED_BY).append(
self._kekData.getName()))
ckData.setContent(content.wireEncodeV2())
# FreshnessPeriod can serve as a soft access control for revoking access.
ckData.getMetaInfo().setFreshnessPeriod(
EncryptorV2.DEFAULT_CK_FRESHNESS_PERIOD_MS)
self._keyChain.sign(ckData, self._ckDataSigningInfo)
self._storage.insert(ckData)
logging.getLogger(__name__).info("Publishing CK data: " +
ckData.getName().toUri())
return True
except Exception as ex:
onError(
EncryptError.ErrorCode.EncryptionFailure,
"Failed to encrypt generated CK with KEK " +
self._kekData.getName().toUri())
return False
def _makeAndPublishCkData(self, onError):
"""
Make a CK Data packet for _ckName encrypted by the KEK in _kekData and
insert it in the _storage.
:param onError: On failure, this calls onError(errorCode, message) where
errorCode is from EncryptError.ErrorCode, and message is an error
string.
:type onError: function object
:return: True on success, else False.
:rtype: bool
"""
try:
kek = PublicKey(self._kekData.getContent())
content = EncryptedContent()
content.setPayload(kek.encrypt
(Blob(self._ckBits, False), EncryptAlgorithmType.RsaOaep))
ckData = Data(
Name(self._ckName).append(EncryptorV2.NAME_COMPONENT_ENCRYPTED_BY)
.append(self._kekData.getName()))
ckData.setContent(content.wireEncodeV2())
# FreshnessPeriod can serve as a soft access control for revoking access.
ckData.getMetaInfo().setFreshnessPeriod(
EncryptorV2.DEFAULT_CK_FRESHNESS_PERIOD_MS)
self._keyChain.sign(ckData, self._ckDataSigningInfo)
self._storage.insert(ckData)
logging.getLogger(__name__).info("Publishing CK data: " +
ckData.getName().toUri())
return True
except Exception as ex:
onError(EncryptError.ErrorCode.EncryptionFailure,
"Failed to encrypt generated CK with KEK " +
self._kekData.getName().toUri())
return False
def _registerPrefixHelper(
self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
wireFormat, face):
"""
Do the work of registerPrefix to register with NDNx once we have an
_ndndId.
:param int registeredPrefixId: The getNextEntryId() which registerPrefix
got so it could return it to the caller. If this is 0, then don't add
to _registeredPrefixTable (assuming it has already been done).
"""
if not WireFormat.ENABLE_NDNX:
# We can get here if the command signing info is set, but running NDNx.
raise RuntimeError(
"registerPrefix with NDNx is deprecated. To enable while you upgrade your code to use NFD, set WireFormat.ENABLE_NDNX = True")
# Create a ForwardingEntry.
# Note: ndnd ignores any freshness that is larger than 3600 seconds and
# sets 300 seconds instead. To register "forever", (=2000000000 sec),
# the freshness period must be omitted.
forwardingEntry = ForwardingEntry()
forwardingEntry.setAction("selfreg")
forwardingEntry.setPrefix(prefix)
forwardingEntry.setForwardingFlags(flags)
content = forwardingEntry.wireEncode(wireFormat)
# Set the ForwardingEntry as the content of a Data packet and sign.
data = Data()
data.setContent(content)
# Set the name to a random value so that each request is unique.
nonce = bytearray(4)
for i in range(len(nonce)):
nonce[i] = _systemRandom.randint(0, 0xff)
data.getName().append(nonce)
# The ndnd ignores the signature, so set to blank values.
data.getSignature().getKeyLocator().setType(
KeyLocatorType.KEY_LOCATOR_DIGEST)
data.getSignature().getKeyLocator().setKeyData(
Blob(bytearray(32), False))
data.getSignature().setSignature(Blob(bytearray(128), False))
encodedData = data.wireEncode(wireFormat)
# Create an interest where the name has the encoded Data packet.
interestName = Name().append("ndnx").append(self._ndndId).append(
"selfreg").append(encodedData)
interest = Interest(interestName)
interest.setInterestLifetimeMilliseconds(4000.0)
interest.setScope(1)
if registeredPrefixId != 0:
interestFilterId = 0
if onInterest != None:
# registerPrefix was called with the "combined" form that includes
# the callback, so add an InterestFilterEntry.
interestFilterId = self.getNextEntryId()
self.setInterestFilter(
interestFilterId, InterestFilter(prefix), onInterest, face)
self._registeredPrefixTable.append(Node._RegisteredPrefix(
registeredPrefixId, prefix, interestFilterId))
# Send the registration interest.
response = Node._RegisterResponse(
self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False,
face)
self.expressInterest(
self.getNextEntryId(), interest, response.onData, response.onTimeout,
wireFormat, face)
def publish(self, interestName, dataName, content, freshnessPeriod,
signingInfo = SigningInfo()):
"""
Put all the segments in the memory store.
:param Name interestName: If the Interest name ends in a segment,
immediately send the Data packet for the segment to the Face.
:param Name dataName: The Data name, which has components after the
Interest name.
:param Blob content: The content of the data to be segmented.
:param float freshnessPeriod The freshness period of the segments,
in milliseconds.
:param SigningInfo signingInfo (optional) The SigningInfo for signing
segment Data packets. If omitted, use the default SigningInfo().
"""
interestSegment = 0
if interestName[-1].isSegment():
interestSegment = interestName[-1].toSegment()
rawBuffer = content.buf()
iSegmentBegin = 0
iEnd = len(content)
maxPacketSize = int(Common.MAX_NDN_PACKET_SIZE / 2)
totalSegments = int(len(content) / maxPacketSize)
finalBlockId = Name.Component.fromSegment(totalSegments)
segmentPrefix = Name(dataName)
segmentPrefix.appendVersion(int(Common.getNowMilliseconds()))
segmentNo = 0
while(True):
iSegmentEnd = iSegmentBegin + maxPacketSize
if iSegmentEnd > iEnd:
iSegmentEnd = iEnd
segmentName = Name(segmentPrefix)
segmentName.appendSegment(segmentNo)
data = Data(segmentName)
data.setContent(Blob(rawBuffer[iSegmentBegin : iSegmentEnd]))
data.getMetaInfo().setFreshnessPeriod(freshnessPeriod)
data.getMetaInfo().setFinalBlockId(finalBlockId)
iSegmentBegin = iSegmentEnd
self._keyChain.sign(data, signingInfo)
# Only send the segment to the Face if it has a pending interest.
# Otherwise, the segment is unsolicited.
if interestSegment == segmentNo:
self._face.putData(data)
# Until InMemoryStorageFifo implements an eviction policy, use InMemoryStorageRetaining.
# storage_.insert(*data, freshnessPeriod)
self._storage.insert(data)
# Make and return a callback since segmentName is different each time.
def makeCallback(localSegmentName):
def callback():
self._storage.remove(localSegmentName)
return callback
self._face.callLater(freshnessPeriod, makeCallback(segmentName))
segmentNo += 1
if not (iSegmentBegin < iEnd):
break
def _processSyncInterest(self, index, syncDigest, face):
"""
Common interest processing, using digest log to find the difference
after syncDigest.
:return: True if sent a data packet to satisfy the interest, otherwise
False.
:rtype: bool
"""
nameList = [] # of str
sequenceNoList = [] # of int
sessionNoList = [] # of int
for j in range(index + 1, len(self._digestLog)):
temp = self._digestLog[j].getData() # array of sync_state_pb2.SyncState.
for i in range(len(temp)):
syncState = temp[i]
if syncState.type != SyncState_UPDATE:
continue
if self._digestTree.find(
syncState.name, syncState.seqno.session) != -1:
n = -1
for k in range(len(nameList)):
if nameList[k] == syncState.name:
n = k
break
if n == -1:
nameList.append(syncState.name)
sequenceNoList.append(syncState.seqno.seq)
sessionNoList.append(syncState.seqno.session)
else:
sequenceNoList[n] = syncState.seqno.seq
sessionNoList[n] = syncState.seqno.session
tempContent = SyncStateMsg()
for i in range(len(nameList)):
content = getattr(tempContent, "ss").add()
content.name = nameList[i]
content.type = SyncState_UPDATE
content.seqno.seq = sequenceNoList[i]
content.seqno.session = sessionNoList[i]
sent = False
if len(getattr(tempContent, "ss")) != 0:
name = Name(self._applicationBroadcastPrefix)
name.append(syncDigest)
# TODO: Check if this works in Python 3.
#pylint: disable=E1103
array = tempContent.SerializeToString()
#pylint: enable=E1103
data = Data(name)
data.setContent(Blob(array))
self._keyChain.sign(data, self._certificateName)
try:
face.putData(data)
except Exception as ex:
logging.getLogger(__name__).error(
"Error in face.putData: %s", str(ex))
return
sent = True
logging.getLogger(__name__).info("Sync Data send")
logging.getLogger(__name__).info("%s", name.toUri())
return sent
def _processSyncInterest(self, index, syncDigest, face):
"""
Common interest processing, using digest log to find the difference
after syncDigest.
:return: True if sent a data packet to satisfy the interest, otherwise
False.
:rtype: bool
"""
nameList = [] # of str
sequenceNoList = [] # of int
sessionNoList = [] # of int
for j in range(index + 1, len(self._digestLog)):
temp = self._digestLog[j].getData(
) # array of sync_state_pb2.SyncState.
for i in range(len(temp)):
syncState = temp[i]
if syncState.type != SyncState_UPDATE:
continue
if self._digestTree.find(syncState.name,
syncState.seqno.session) != -1:
n = -1
for k in range(len(nameList)):
if nameList[k] == syncState.name:
n = k
break
if n == -1:
nameList.append(syncState.name)
sequenceNoList.append(syncState.seqno.seq)
sessionNoList.append(syncState.seqno.session)
else:
sequenceNoList[n] = syncState.seqno.seq
sessionNoList[n] = syncState.seqno.session
tempContent = SyncStateMsg()
for i in range(len(nameList)):
content = getattr(tempContent, "ss").add()
content.name = nameList[i]
content.type = SyncState_UPDATE
content.seqno.seq = sequenceNoList[i]
content.seqno.session = sessionNoList[i]
sent = False
if len(getattr(tempContent, "ss")) != 0:
name = Name(self._applicationBroadcastPrefix)
name.append(syncDigest)
# TODO: Check if this works in Python 3.
#pylint: disable=E1103
array = tempContent.SerializeToString()
#pylint: enable=E1103
data = Data(name)
data.setContent(Blob(array))
self._keyChain.sign(data, self._certificateName)
try:
face.putData(data)
except Exception as ex:
logging.getLogger(__name__).error("Error in face.putData: %s",
str(ex))
return
sent = True
logging.getLogger(__name__).info("Sync Data send")
logging.getLogger(__name__).info("%s", name.toUri())
return sent
def publish(self,
interestName,
dataName,
content,
freshnessPeriod,
signingInfo=SigningInfo()):
"""
Put all the segments in the memory store.
:param Name interestName: If the Interest name ends in a segment,
immediately send the Data packet for the segment to the Face.
:param Name dataName: The Data name, which has components after the
Interest name.
:param Blob content: The content of the data to be segmented.
:param float freshnessPeriod The freshness period of the segments,
in milliseconds.
:param SigningInfo signingInfo (optional) The SigningInfo for signing
segment Data packets. If omitted, use the default SigningInfo().
"""
interestSegment = 0
if interestName[-1].isSegment():
interestSegment = interestName[-1].toSegment()
rawBuffer = content.buf()
iSegmentBegin = 0
iEnd = len(content)
maxPacketSize = int(Common.MAX_NDN_PACKET_SIZE / 2)
totalSegments = int(len(content) / maxPacketSize)
finalBlockId = Name.Component.fromSegment(totalSegments)
segmentPrefix = Name(dataName)
segmentPrefix.appendVersion(int(Common.getNowMilliseconds()))
segmentNo = 0
while (True):
iSegmentEnd = iSegmentBegin + maxPacketSize
if iSegmentEnd > iEnd:
iSegmentEnd = iEnd
segmentName = Name(segmentPrefix)
segmentName.appendSegment(segmentNo)
data = Data(segmentName)
data.setContent(Blob(rawBuffer[iSegmentBegin:iSegmentEnd]))
data.getMetaInfo().setFreshnessPeriod(freshnessPeriod)
data.getMetaInfo().setFinalBlockId(finalBlockId)
iSegmentBegin = iSegmentEnd
self._keyChain.sign(data, signingInfo)
# Only send the segment to the Face if it has a pending interest.
# Otherwise, the segment is unsolicited.
if interestSegment == segmentNo:
self._face.putData(data)
# Until InMemoryStorageFifo implements an eviction policy, use InMemoryStorageRetaining.
# storage_.insert(*data, freshnessPeriod)
self._storage.insert(data)
# Make and return a callback since segmentName is different each time.
def makeCallback(localSegmentName):
def callback():
self._storage.remove(localSegmentName)
return callback
self._face.callLater(freshnessPeriod, makeCallback(segmentName))
segmentNo += 1
if not (iSegmentBegin < iEnd):
break
