def build_interest(self, latest): if self.start_with_latest: latest=True self.start_with_latest = False excl = Interest.ExclusionFilter() excl.add_any() excl.add_name(Name.Name([self.latest_version])) # expected result should be between those two names excl.add_name(Name.Name([self.last_version_marker])) excl.add_any() interest = Interest.Interest(name=self.base_name, exclude=excl, \ minSuffixComponents=3, maxSuffixComponents=3) interest.childSelector = 1 if latest else 0 return interest
def fetch_media(self):
'''Fetch remote media and control data.
Check every 10 ms.
If the remote user is not Stopped, probe for its media and control;
Otherwise, if it's Streaming, send the media Interest if the number of outstanding Interests is less than pipe_size
'''
if self.factory.has_local_client():
for remote_user in self.factory.roster.values():
if remote_user.streaming_state == RemoteUser.Stopped:
name = remote_user.get_media_prefix()
template = Interest(childSelector = 1)
self.ccnx_int_socket.send_interest(name, self.probe_closure, template)
self.__class__.__logger.debug('RTP-INT:%s', name)
remote_user.streaming_state = RemoteUser.Probing
# also fetch ctrl messages
ctrl_name = remote_user.get_ctrl_prefix() + '/' + self.factory.client.local_user.uid
self.ccnx_int_socket.send_interest(ctrl_name, self.ctrl_probe_closure, template)
self.__class__.__logger.debug('CTRL-INT:%s', ctrl_name)
elif remote_user.streaming_state == RemoteUser.Streaming:
while remote_user.requested_seq - remote_user.fetched_seq < self.pipe_size:
name = remote_user.get_media_prefix() + '/' + str(remote_user.requested_seq + 1)
remote_user.requested_seq += 1
self.ccnx_int_socket.send_interest(name, self.stream_closure)
self.__class__.__logger.debug('RTP-INT:%s', name)
else:
pass
def start(self):
self.handle.setInterestFilter(self.name, self)
interest = Interest.Interest(name=Name.Name(self.name))
interest.name += '\xC1.R.sw'
interest.name.appendNonce()
print("Expressing interest: ccnx:%s" % interest.name)
self.handle.expressInterest(interest.name, self, interest)
self.handle.run(-1)
from pyccn import Interest, Name, Key, CCN, _pyccn
import datetime
k = CCN.getDefaultKey()
i = Interest()
i.name = Name('/hello/world')
i.minSuffixComponents = 2
i.maxSuffixComponents = 4
i.publisherPublicKeyDigest = k.publicKeyID
i.exclude = None
i.childSelector = 1
i.answerOriginKind = 4
i.scope = 2
i.interestLifetime = 30.0
i.nonce = b'abababa'
print(i)
print(i.ccn_data)
i2 = _pyccn.Interest_obj_from_ccn(i.ccn_data)
print(i2)
assert (i.name == i2.name)
assert (i.minSuffixComponents == i2.minSuffixComponents)
assert (i.maxSuffixComponents == i2.maxSuffixComponents)
assert (i.publisherPublicKeyDigest == i2.publisherPublicKeyDigest)
assert (i.exclude == i2.exclude)
assert (i.childSelector == i2.childSelector)
assert (i.scope == i2.scope)
assert (i.interestLifetime == i2.interestLifetime)
import pyccn
from pyccn import CCN, Name, Interest, Key, ContentObject, Closure, KeyLocator, ExclusionFilter
from Tyzx import CompositeObject, BaseObject
prefix = "ccnx:/ndn/ucla.edu/apps/tv1/occupants"
DISCOVER_INTEREST_PERIOD = 0.250 # How often
UPDATE_INTEREST_PERIOD = 0.250
CCN_WAIT_TIME_MS = 1
tyzxObjects = {}
oldObjects = set() # still may be in the content store
ccn = CCN()
interestDiscover = Interest()
interestDiscover.name = Name(prefix)
interestDiscover.minSuffixComponents = 2 # occupant id + the implicit digest at a minimum
interestUpdate = Interest()
interestUpdate.minSuffixComponents = 2 # time (version) + the implicit digest
interestUpdate.childSelector = 1 # rightmost child
#interestUpdate.interestLifetime = ????
lastdiscovertime = 0
def versionFromTime(t):
bintime = struct.pack("!Q", int(t * 4096 + 0.5))
version = bintime.lstrip(b'\x00')
return b'\xfd' + version
event_loop.stop()
return pyccn.RESULT_OK
senderclosure = SenderClosure()
receiverclosure = ReceiverClosure()
sender_handle = CCN()
receiver_handle = CCN()
#Looks like the CCNx API doesn't deliver messages
#that we sent to ourselves, so we just push it
sender_handle.setInterestFilter(n, senderclosure)
#senderclosure.upcall(1, None)
i = Interest()
receiver_handle.expressInterest(n, receiverclosure, i)
upcall_called = False
print("Running loops")
#So sender closure is called
#sender_handle.run(500)
#So receiver closure is called
#receiver_handle.run(500)
# New way of doing this
event_loop = pyccn.EventLoop(sender_handle, receiver_handle)
event_loop.run()
from pyccn import Interest, Name, Key, CCN, _pyccn
import datetime
k = CCN.getDefaultKey()
i = Interest()
i.name = Name('/hello/world')
i.minSuffixComponents = 2
i.maxSuffixComponents = 4
i.publisherPublicKeyDigest = k.publicKeyID
i.exclude = None
i.childSelector = 1
i.answerOriginKind = 4
i.scope = 2
i.interestLifetime = 30.0
i.nonce = b'abababa'
print(i)
print(i.ccn_data)
i2 = _pyccn.Interest_obj_from_ccn(i.ccn_data)
print(i2)
assert(i.name == i2.name)
assert(i.minSuffixComponents == i2.minSuffixComponents)
assert(i.maxSuffixComponents == i2.maxSuffixComponents)
assert(i.publisherPublicKeyDigest == i2.publisherPublicKeyDigest)
assert(i.exclude == i2.exclude)
assert(i.childSelector == i2.childSelector)
assert(i.scope == i2.scope)
assert(i.interestLifetime == i2.interestLifetime)
import pyccn
from pyccn import CCN, Name, Interest, Key, ContentObject, Closure, KeyLocator, ExclusionFilter
from Tyzx import CompositeObject, BaseObject
prefix = "ccnx:/ndn/ucla.edu/apps/tv1/occupants"
DISCOVER_INTEREST_PERIOD = 0.250 # How often
UPDATE_INTEREST_PERIOD = 0.250
CCN_WAIT_TIME_MS = 1
tyzxObjects = {}
oldObjects = set() # still may be in the content store
ccn = CCN()
interestDiscover = Interest()
interestDiscover.name = Name(prefix)
interestDiscover.minSuffixComponents = 2 # occupant id + the implicit digest at a minimum
interestUpdate = Interest()
interestUpdate.minSuffixComponents = 2 # time (version) + the implicit digest
interestUpdate.childSelector = 1 # rightmost child
#interestUpdate.interestLifetime = ????
lastdiscovertime = 0
def versionFromTime(t):
bintime = struct.pack("!Q", int(t * 4096 + 0.5))
version = bintime.lstrip(b'\x00')
return b'\xfd' + version
last_version_marker = '\xfe\x00\x00\x00\x00\x00\x00'