def _sendKeyInterest(self, interest, timeSlot, onEncryptedKeys, onError):
"""
Send an interest with the given name through the face with callbacks to
_handleCoveringKey, _handleTimeout and _handleNetworkNack.
:param Interest interest: The interest to send.
:param float timeSlot: The time slot, passed to _handleCoveringKey,
_handleTimeout and _handleNetworkNack.
:param onEncryptedKeys: The OnEncryptedKeys callback, passed to
_handleCoveringKey, _handleTimeout and _handleNetworkNack.
:type onEncryptedKeys: function object
:param onError: This calls onError(errorCode, message) for an error.
:type onError: function object
"""
def onKey(interest, data):
self._handleCoveringKey(interest, data, timeSlot, onEncryptedKeys,
onError)
def onTimeout(interest):
self._handleTimeout(interest, timeSlot, onEncryptedKeys, onError)
def onNetworkNack(interest, networkNack):
self._handleNetworkNack(interest, networkNack, timeSlot,
onEncryptedKeys, onError)
if self._keyRetrievalLink.getDelegations().size() == 0:
# We can use the supplied interest without copying.
request = interest
else:
# Copy the supplied interest and add the Link.
request = Interest(interest)
# This will use a cached encoding if available.
request.setLinkWireEncoding(self._keyRetrievalLink.wireEncode())
self._face.expressInterest(request, onKey, onTimeout, onNetworkNack)
def _sendKeyInterest(self, interest, timeSlot, onEncryptedKeys, onError):
"""
Send an interest with the given name through the face with callbacks to
_handleCoveringKey, _handleTimeout and _handleNetworkNack.
:param Interest interest: The interest to send.
:param float timeSlot: The time slot, passed to _handleCoveringKey,
_handleTimeout and _handleNetworkNack.
:param onEncryptedKeys: The OnEncryptedKeys callback, passed to
_handleCoveringKey, _handleTimeout and _handleNetworkNack.
:type onEncryptedKeys: function object
:param onError: This calls onError(errorCode, message) for an error.
:type onError: function object
"""
def onKey(interest, data):
self._handleCoveringKey(interest, data, timeSlot, onEncryptedKeys, onError)
def onTimeout(interest):
self._handleTimeout(interest, timeSlot, onEncryptedKeys, onError)
def onNetworkNack(interest, networkNack):
self._handleNetworkNack(interest, networkNack, timeSlot, onEncryptedKeys, onError)
if self._keyRetrievalLink.getDelegations().size() == 0:
# We can use the supplied interest without copying.
request = interest
else:
# Copy the supplied interest and add the Link.
request = Interest(interest)
# This will use a cached encoding if available.
request.setLinkWireEncoding(self._keyRetrievalLink.wireEncode())
self._face.expressInterest(request, onKey, onTimeout, onNetworkNack)
def _sendInterest(self, interest, nRetrials, link, onVerified, onError):
"""
Express the interest, call verifyData for the fetched Data packet and
call onVerified if verify succeeds. If verify fails, call
onError(EncryptError.ErrorCode.Validation, "verifyData failed"). If the
interest times out, re-express nRetrials times. If the interest times
out nRetrials times, or for a network Nack, call
onError(EncryptError.ErrorCode.DataRetrievalFailure, interest.getName().toUri()).
:param Interest interest: The Interest to express.
:param int nRetrials: The number of retrials left after a timeout.
:param Link link: The Link object to use in the Interest. This does not
make a copy of the Link object. If the Link object's
getDelegations().size() is zero, don't use it.
:param onVerified: When the fetched Data packet validation succeeds,
this calls onVerified(data).
:type onVerified: function object
:param onError: This calls onError(errorCode, message) for an error,
where errorCode is from EncryptError.ErrorCode and message is a str.
:type onError: function object
"""
# Prepare the callback functions.
def onData(contentInterest, contentData):
# The Interest has no selectors, so assume the library correctly
# matched with the Data name before calling onData.
try:
self._keyChain.verifyData(
contentData, onVerified,
lambda d, reason: Consumer._callOnError(
onError, EncryptError.ErrorCode.Validation,
"verifyData failed. Reason: " + reason))
except Exception as ex:
try:
onError(EncryptError.ErrorCode.General,
"verifyData error: " + repr(ex))
except:
logging.exception("Error in onError")
def onNetworkNack(interest, networkNack):
# We have run out of options. Report a retrieval failure.
try:
onError(EncryptError.ErrorCode.DataRetrievalFailure,
interest.getName().toUri())
except:
logging.exception("Error in onError")
def onTimeout(interest):
if nRetrials > 0:
self._sendInterest(interest, nRetrials - 1, link, onVerified,
onError)
else:
onNetworkNack(interest, NetworkNack())
if link.getDelegations().size() == 0:
# We can use the supplied interest without copying.
request = interest
else:
# Copy the supplied interest and add the Link.
request = Interest(interest)
# This will use a cached encoding if available.
request.setLinkWireEncoding(link.wireEncode())
try:
self._face.expressInterest(request, onData, onTimeout,
onNetworkNack)
except Exception as ex:
try:
onError(EncryptError.ErrorCode.General,
"expressInterest error: " + repr(ex))
except:
logging.exception("Error in onError")
def _sendInterest(self, interest, nRetrials, link, onVerified, onError):
"""
Express the interest, call verifyData for the fetched Data packet and
call onVerified if verify succeeds. If verify fails, call
onError(EncryptError.ErrorCode.Validation, "verifyData failed"). If the
interest times out, re-express nRetrials times. If the interest times
out nRetrials times, or for a network Nack, call
onError(EncryptError.ErrorCode.DataRetrievalFailure, interest.getName().toUri()).
:param Interest interest: The Interest to express.
:param int nRetrials: The number of retrials left after a timeout.
:param Link link: The Link object to use in the Interest. This does not
make a copy of the Link object. If the Link object's
getDelegations().size() is zero, don't use it.
:param onVerified: When the fetched Data packet validation succeeds,
this calls onVerified(data).
:type onVerified: function object
:param onError: This calls onError(errorCode, message) for an error,
where errorCode is from EncryptError.ErrorCode and message is a str.
:type onError: function object
"""
# Prepare the callback functions.
def onData(contentInterest, contentData):
# The Interest has no selectors, so assume the library correctly
# matched with the Data name before calling onData.
try:
self._keyChain.verifyData(
contentData, onVerified,
lambda d, reason: Consumer._callOnError(
onError, EncryptError.ErrorCode.Validation,
"verifyData failed. Reason: " + reason))
except Exception as ex:
try:
onError(EncryptError.ErrorCode.General, "verifyData error: " + repr(ex))
except:
logging.exception("Error in onError")
def onNetworkNack(interest, networkNack):
# We have run out of options. Report a retrieval failure.
try:
onError(EncryptError.ErrorCode.DataRetrievalFailure,
interest.getName().toUri())
except:
logging.exception("Error in onError")
def onTimeout(interest):
if nRetrials > 0:
self._sendInterest(interest, nRetrials - 1, link, onVerified, onError)
else:
onNetworkNack(interest, NetworkNack())
if link.getDelegations().size() == 0:
# We can use the supplied interest without copying.
request = interest
else:
# Copy the supplied interest and add the Link.
request = Interest(interest)
# This will use a cached encoding if available.
request.setLinkWireEncoding(link.wireEncode())
try:
self._face.expressInterest(request, onData, onTimeout, onNetworkNack)
except Exception as ex:
try:
onError(EncryptError.ErrorCode.General,
"expressInterest error: " + repr(ex))
except:
logging.exception("Error in onError")
