def checkReservation(self, resource, start_time, end_time):
self._checkArgs(resource, start_time, end_time)
# check start time is before end time
if start_time is not None and end_time is not None and start_time > end_time:
raise error.PayloadError(
'Invalid request: Reverse duration (end time before start time)'
)
if start_time is not None:
# check that start time is not in the past
now = datetime.datetime.utcnow()
if start_time < now:
delta = now - start_time
stamp = str(start_time).rsplit('.')[0]
variables = [('startTime', start_time.isoformat())]
raise error.PayloadError(
'Invalid request: Start time in the past (Startime: %s, Delta: %s)'
% (stamp, str(delta)),
variables=variables)
# check the start time makes sense
if start_time > datetime.datetime(2025, 1, 1):
raise error.PayloadError(
'Invalid request: Start time after year 2025')
for (c_resource, c_start_time, c_end_time) in self.reservations:
if resource == c_resource:
if self._resourceOverlap(c_start_time, c_end_time, start_time,
end_time):
raise error.STPUnavailableError(
'Resource %s not available in specified time span' %
resource)
def parseLabel(label_part):
if not '=' in label_part:
raise error.PayloadError('No = in urn label part (%s)' % label_part)
label_short_type, label_value = label_part.split('=')
try:
label_type = LABEL_MAP[label_short_type]
except KeyError:
raise error.PayloadError('Label type %s not recognized')
return nsa.Label(label_type, label_value)
def _checkTiming(self, res_start, res_end):
# check that ports are available in the specified schedule
if res_start in [ None, '' ] or res_end in [ None, '' ]:
raise error.MissingParameterError('Reservation must specify start and end time (was either None or '')')
# sanity checks
if res_start > res_end:
raise error.PayloadError('Refusing to make reservation with reverse duration')
if res_start < datetime.datetime.now(tzutc()):
raise error.PayloadError('Refusing to make reservation with start time in the past')
if res_start > datetime.datetime(2025, 1, 1):
raise error.PayloadError('Refusing to make reservation with start time after 2025')
def createValue(value):
try:
if '-' in value:
v1, v2 = value.split('-', 1)
i1, i2 = int(v1), int(v2)
if i1 > i2:
raise error.PayloadError(
'Label value %s is in descending order, which is not allowed.'
% value)
else:
i1 = int(value)
i2 = i1
return i1, i2
except ValueError:
raise error.PayloadError(
'Label %s is not an integer or an integer range.' % value)
def parseXMLTimestamp(xsd_timestamp):
dt = iso8601.parse(xsd_timestamp)
if dt.utcoffset() is None:
# this needs to changed to valueerror...
raise error.PayloadError('Timestamp has no time zone information')
# convert to utc and remove tz info (internal use)
utc_dt = dt.astimezone(UTC()).replace(tzinfo=None)
return utc_dt
def createSTP(stp_id):
if not stp_id.startswith(URN_NETWORK):
raise error.PayloadError('STP Id (%s) did not start with %s' %
(stp_id, URN_NETWORK))
tsi = stp_id.replace(URN_NETWORK, '')
if '?' in tsi:
loc, lbp = tsi.split('?')
label = parseLabel(lbp)
else:
loc = tsi
label = None
if not ':' in loc:
raise error.PayloadError('No : in stp urn (%s)' % loc)
network, port = loc.rsplit(':', 1)
return nsa.STP(network, port, label)
def createSTP(stp_id):
if not stp_id.startswith(URN_NETWORK):
raise error.PayloadError('STP Id (%s) did not start with %s' %
(stp_id, URN_NETWORK))
tsi = stp_id.replace(URN_NETWORK, '')
if '?' in tsi:
loc, lbp = tsi.split('?')
label = parseLabel(lbp)
else:
loc = tsi
label = None
if not ':' in loc:
raise error.PayloadError('Invalid STP: No ":" in stp urn (%s)' % loc)
# FIXME This may need to be updated for new stp structure (Uppsala)
network, port = loc.rsplit(':', 1)
return nsa.STP(network, port, label)
def parseXMLTimestamp(xsd_timestamp):
xtp = parser.parser()
dt = xtp.parse(xsd_timestamp)
if dt.utcoffset() is None:
# this needs to changed to valueerror...
from opennsa import error
raise error.PayloadError('Timestamp has no time zone information')
# convert to utc and remove tz info (internal use)
utc_dt = dt.astimezone(tzutc()).replace(tzinfo=None)
return utc_dt
def reserve(self, soap_data):
t_start = time.time()
header, reservation = helper.parseRequest(soap_data)
# do some checking here
# print header.protocolVersion
# print header.correlationId
# print header.requesterNSA
# print header.providerNSA
# print header.replyTo
criteria = reservation.criteria
#version = criteria.version # not used at the moment
service_type = criteria.serviceType # right now we just ignore this, either we know the service type or not
p2ps = criteria.serviceDefinition
# if len(service_defs) == 0:
# err = failure.Failure ( error.PayloadError('No service definition element in message') )
# return self._createSOAPFault(err, header.provider_nsa, service_type=service_type)
# if len(service_defs) != 1:
# err = failure.Failure ( error.PayloadError('Only one service definition allowed') )
# return self._createSOAPFault(err, header.provider_nsa, service_type=service_type)
if type(p2ps) is not p2pservices.P2PServiceBaseType:
err = failure.Failure(
error.PayloadError(
'Only supports Point2PointService service for now.'))
return self._createSOAPFault(err,
header.provider_nsa,
service_type=service_type)
if p2ps.directionality in (None, ''):
err = failure.Failure(
error.MissingParameterError(
'Directionality parameter not defined'))
return self._createSOAPFault(err, header.provider_nsa)
# create DTOs (EROs not supported yet)
start_time = xmlhelper.parseXMLTimestamp(
criteria.schedule.startTime
) if criteria.schedule.startTime is not None else None
end_time = xmlhelper.parseXMLTimestamp(criteria.schedule.endTime)
schedule = nsa.Schedule(start_time, end_time)
src_stp = helper.createSTP(p2ps.sourceSTP)
dst_stp = helper.createSTP(p2ps.destSTP)
if p2ps.ero:
err = failure.Failure(
error.PayloadError('ERO not supported, go away.'))
return self._createSOAPFault(err, header.provider_nsa)
# if p2ps.parameter:
# p = p2ps.parameter[0]
# err = failure.Failure ( error.UnsupportedParameter('Unsupported parameter: %s/%s' % (p.type_, p.value) ) )
# return self._createSOAPFault(err, header.provider_nsa)
params = [(p.type_, p.value)
for p in p2ps.parameter] if p2ps.parameter else None
symmetric = p2ps.symmetricPath or False # the p2p service specifies default behaviour as false, but doesn't specify default
sd = nsa.Point2PointService(src_stp, dst_stp, p2ps.capacity,
p2ps.directionality, symmetric, None,
params)
crt = nsa.Criteria(criteria.version, schedule, sd)
t_delta = time.time() - t_start
log.msg('Profile: Reserve request parse time: %s' % round(t_delta, 3),
profile=True,
system=LOG_SYSTEM)
d = self.provider.reserve(header, reservation.connectionId,
reservation.globalReservationId,
reservation.description, crt)
def createReserveAcknowledgement(connection_id):
# no reply to / security attrs / trace
soap_header_element = helper.createProviderHeader(
header.requester_nsa, header.provider_nsa, None,
header.correlation_id)
reserve_response = nsiconnection.ReserveResponseType(connection_id)
reserve_response_element = reserve_response.xml(
nsiconnection.reserveResponse)
payload = minisoap.createSoapPayload(reserve_response_element,
soap_header_element)
return payload
d.addCallbacks(createReserveAcknowledgement,
self._createSOAPFault,
errbackArgs=(header.provider_nsa, ))
return d
