/
smpp_transport.py
535 lines (437 loc) · 19.2 KB
/
smpp_transport.py
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# -*- test-case-name: vumi.transports.smpp.tests.test_smpp_transport -*-
import json
import warnings
from uuid import uuid4
from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks, returnValue, succeed
from smpp.pdu import decode_pdu
from smpp.pdu_builder import PDU
from vumi import log
from vumi.message import TransportUserMessage
from vumi.persist.txredis_manager import TxRedisManager
from vumi.transports.base import Transport
from vumi.transports.smpp.config import SmppTransportConfig
from vumi.transports.smpp.deprecated.transport import (
SmppTransportConfig as OldSmppTransportConfig)
from vumi.transports.smpp.deprecated.utils import convert_to_new_config
from vumi.transports.smpp.smpp_service import SmppService
from vumi.transports.failures import FailureMessage
def sequence_number_key(seq_no):
return 'sequence_number:%s' % (seq_no,)
def multipart_info_key(seq_no):
return 'multipart_info:%s' % (seq_no,)
def message_key(message_id):
return 'message:%s' % (message_id,)
def pdu_key(seq_no):
return 'pdu:%s' % (seq_no,)
def remote_message_key(message_id):
return 'remote_message:%s' % (message_id,)
class CachedPDU(object):
"""
A cached PDU with its associated vumi message_id.
"""
def __init__(self, vumi_message_id, pdu):
self.vumi_message_id = vumi_message_id
self.pdu = pdu
self.seq_no = pdu.obj['header']['sequence_number']
@classmethod
def from_json(cls, pdu_json):
if pdu_json is None:
return None
pdu_data = json.loads(pdu_json)
pdu = PDU(None, None, None)
pdu.obj = decode_pdu(pdu_data['pdu'])
return cls(pdu_data['vumi_message_id'], pdu)
def to_json(self):
return json.dumps({
'vumi_message_id': self.vumi_message_id,
# We store the PDU in wire format to avoid json encoding troubles.
'pdu': self.pdu.get_hex(),
})
class SmppMessageDataStash(object):
"""
Stash message data in Redis.
"""
def __init__(self, redis, config):
self.redis = redis
self.config = config
def init_multipart_info(self, message_id, part_count):
key = multipart_info_key(message_id)
expiry = self.config.submit_sm_expiry
d = self.redis.hmset(key, {
'parts': part_count,
})
d.addCallback(lambda _: self.redis.expire(key, expiry))
return d
def get_multipart_info(self, message_id):
key = multipart_info_key(message_id)
return self.redis.hgetall(key)
def _update_multipart_info_success_cb(self, mp_info, key, remote_id):
if not mp_info:
# No multipart data, so do nothing.
return
part_key = 'part:%s' % (remote_id,)
mp_info[part_key] = 'ack'
d = self.redis.hset(key, part_key, 'ack')
d.addCallback(lambda _: mp_info)
return d
def update_multipart_info_success(self, message_id, remote_id):
key = multipart_info_key(message_id)
d = self.get_multipart_info(message_id)
d.addCallback(self._update_multipart_info_success_cb, key, remote_id)
return d
def _update_multipart_info_failure_cb(self, mp_info, key, remote_id):
if not mp_info:
# No multipart data, so do nothing.
return
part_key = 'part:%s' % (remote_id,)
mp_info[part_key] = 'fail'
d = self.redis.hset(key, part_key, 'fail')
d.addCallback(lambda _: self.redis.hset(key, 'event_result', 'fail'))
d.addCallback(lambda _: mp_info)
return d
def update_multipart_info_failure(self, message_id, remote_id):
key = multipart_info_key(message_id)
d = self.get_multipart_info(message_id)
d.addCallback(self._update_multipart_info_failure_cb, key, remote_id)
return d
def _determine_multipart_event_cb(self, mp_info, message_id, event_type,
remote_id):
if not mp_info:
# We don't seem to have a multipart message, so just return the
# single-message data.
return (True, event_type, remote_id)
part_status_dict = dict(
(k[5:], v) for k, v in mp_info.items() if k.startswith('part:'))
remote_id = ','.join(sorted(part_status_dict.keys()))
event_result = mp_info.get('event_result', None)
if event_result is not None:
# We already have a result, even if we don't have all the parts.
event_type = event_result
elif len(part_status_dict) >= int(mp_info['parts']):
# We have all the parts, so we can determine the event type.
if all(pv == 'ack' for pv in part_status_dict.values()):
# All parts happy.
event_type = 'ack'
else:
# At least one part failed.
event_type = 'fail'
else:
# We don't have all the parts yet.
return (False, None, None)
# There's a race condition when we process multiple submit_sm_resps for
# parts of the same messages concurrently. We only want to send one
# event, so we do an atomic increment and ignore the event if we're
# not the first to succeed.
d = self.redis.hincrby(
multipart_info_key(message_id), 'event_counter', 1)
def confirm_multipart_event_cb(counter_value):
if int(counter_value) == 1:
return (True, event_type, remote_id)
else:
return (False, None, None)
d.addCallback(confirm_multipart_event_cb)
return d
def get_multipart_event_info(self, message_id, event_type, remote_id):
d = self.get_multipart_info(message_id)
d.addCallback(
self._determine_multipart_event_cb, message_id, event_type,
remote_id)
return d
def expire_multipart_info(self, message_id):
"""
Set the TTL on multipart info hash to something small. We don't delete
this in case there's still an in-flight operation that will recreate it
without a TTL.
"""
expiry = self.config.completed_multipart_info_expiry
return self.redis.expire(multipart_info_key(message_id), expiry)
def set_sequence_number_message_id(self, sequence_number, message_id):
key = sequence_number_key(sequence_number)
expiry = self.config.submit_sm_expiry
return self.redis.setex(key, expiry, message_id)
def get_sequence_number_message_id(self, sequence_number):
return self.redis.get(sequence_number_key(sequence_number))
def delete_sequence_number_message_id(self, sequence_number):
return self.redis.delete(sequence_number_key(sequence_number))
def cache_message(self, message):
key = message_key(message['message_id'])
expiry = self.config.submit_sm_expiry
return self.redis.setex(key, expiry, message.to_json())
def get_cached_message(self, message_id):
d = self.redis.get(message_key(message_id))
d.addCallback(lambda json_data: (
TransportUserMessage.from_json(json_data)
if json_data else None))
return d
def delete_cached_message(self, message_id):
return self.redis.delete(message_key(message_id))
def cache_pdu(self, vumi_message_id, pdu):
cached_pdu = CachedPDU(vumi_message_id, pdu)
key = pdu_key(cached_pdu.seq_no)
expiry = self.config.submit_sm_expiry
return self.redis.setex(key, expiry, cached_pdu.to_json())
def get_cached_pdu(self, seq_no):
d = self.redis.get(pdu_key(seq_no))
return d.addCallback(CachedPDU.from_json)
def delete_cached_pdu(self, seq_no):
return self.redis.delete(pdu_key(seq_no))
def set_remote_message_id(self, message_id, smpp_message_id):
if message_id is None:
# If we store None, we end up with the string "None" in Redis. This
# confuses later lookups (which treat any non-None value as a valid
# identifier) and results in broken delivery reports.
return succeed(None)
key = remote_message_key(smpp_message_id)
expire = self.config.third_party_id_expiry
d = self.redis.setex(key, expire, message_id)
d.addCallback(lambda _: message_id)
return d
def get_internal_message_id(self, smpp_message_id):
return self.redis.get(remote_message_key(smpp_message_id))
def delete_remote_message_id(self, smpp_message_id):
key = remote_message_key(smpp_message_id)
return self.redis.delete(key)
def expire_remote_message_id(self, smpp_message_id):
key = remote_message_key(smpp_message_id)
expire = self.config.final_dr_third_party_id_expiry
return self.redis.expire(key, expire)
class SmppTransceiverTransport(Transport):
CONFIG_CLASS = SmppTransportConfig
bind_type = 'TRX'
clock = reactor
start_message_consumer = False
@property
def throttled(self):
return self.service.throttled
@inlineCallbacks
def setup_transport(self):
config = self.get_static_config()
log.msg('Starting SMPP Transport for: %s' % (config.twisted_endpoint,))
default_prefix = '%s@%s' % (config.system_id,
config.transport_name)
redis_prefix = config.split_bind_prefix or default_prefix
self.redis = (yield TxRedisManager.from_config(
config.redis_manager)).sub_manager(redis_prefix)
self.dr_processor = config.delivery_report_processor(
self, config.delivery_report_processor_config)
self.deliver_sm_processor = config.deliver_short_message_processor(
self, config.deliver_short_message_processor_config)
self.submit_sm_processor = config.submit_short_message_processor(
self, config.submit_short_message_processor_config)
self.disable_ack = config.disable_ack
self.message_stash = SmppMessageDataStash(self.redis, config)
self.service = self.start_service()
def start_service(self):
config = self.get_static_config()
service = SmppService(config.twisted_endpoint, self.bind_type, self)
service.clock = self.clock
service.startService()
return service
@inlineCallbacks
def teardown_transport(self):
if self.service:
yield self.service.stopService()
yield self.redis._close()
def _check_address_valid(self, message, field):
try:
message[field].encode('ascii')
except UnicodeError:
return False
return True
def _reject_for_invalid_address(self, message, field):
return self.publish_nack(
message['message_id'], u'Invalid %s: %s' % (field, message[field]))
@inlineCallbacks
def on_smpp_binding(self):
yield self.publish_status_binding()
@inlineCallbacks
def on_smpp_bind(self):
yield self.publish_status_bound()
if self.throttled:
yield self.publish_throttled()
@inlineCallbacks
def on_throttled(self):
yield self.publish_throttled()
@inlineCallbacks
def on_throttled_resume(self):
yield self.publish_throttled()
@inlineCallbacks
def on_throttled_end(self):
yield self.publish_throttled_end()
@inlineCallbacks
def on_smpp_bind_timeout(self):
yield self.publish_status_bind_timeout()
@inlineCallbacks
def on_connection_lost(self, reason):
yield self.publish_status_connection_lost(reason)
def publish_status_binding(self):
return self.publish_status(
status='major',
component='smpp',
type='binding',
message='Binding')
def publish_status_bound(self):
return self.publish_status(
status='good',
component='smpp',
type='bound',
message='Bound')
def publish_throttled(self):
return self.publish_status(
status='minor',
component='smpp',
type='throttled',
message='Throttled')
def publish_throttled_end(self):
return self.publish_status(
status='good',
component='smpp',
type='throttled_end',
message='No longer throttled')
def publish_status_bind_timeout(self):
return self.publish_status(
status='major',
component='smpp',
type='bind_timeout',
message='Timed out awaiting bind')
def publish_status_connection_lost(self, reason):
return self.publish_status(
status='major',
component='smpp',
type='connection_lost',
message=str(reason.value))
@inlineCallbacks
def handle_outbound_message(self, message):
if not self._check_address_valid(message, 'to_addr'):
yield self._reject_for_invalid_address(message, 'to_addr')
return
if not self._check_address_valid(message, 'from_addr'):
yield self._reject_for_invalid_address(message, 'from_addr')
return
yield self.message_stash.cache_message(message)
yield self.submit_sm_processor.handle_outbound_message(
message, self.service)
@inlineCallbacks
def process_submit_sm_event(self, message_id, event_type, remote_id,
command_status):
if event_type == 'ack':
yield self.message_stash.delete_cached_message(message_id)
yield self.message_stash.expire_multipart_info(message_id)
if not self.disable_ack:
yield self.publish_ack(message_id, remote_id)
else:
if event_type != 'fail':
log.warning(
"Unexpected multipart event type %r, assuming 'fail'" % (
event_type,))
err_msg = yield self.message_stash.get_cached_message(message_id)
command_status = command_status or 'Unspecified'
if err_msg is None:
log.warning(
"Could not retrieve failed message: %s" % (message_id,))
else:
yield self.message_stash.delete_cached_message(message_id)
yield self.message_stash.expire_multipart_info(message_id)
yield self.publish_nack(message_id, command_status)
yield self.failure_publisher.publish_message(
FailureMessage(message=err_msg.payload,
failure_code=None,
reason=command_status))
@inlineCallbacks
def handle_submit_sm_success(self, message_id, smpp_message_id,
command_status):
yield self.message_stash.update_multipart_info_success(
message_id, smpp_message_id)
event_info = yield self.message_stash.get_multipart_event_info(
message_id, 'ack', smpp_message_id)
event_required, event_type, remote_id = event_info
if event_required:
yield self.process_submit_sm_event(
message_id, event_type, remote_id, command_status)
@inlineCallbacks
def handle_submit_sm_failure(self, message_id, smpp_message_id,
command_status):
yield self.message_stash.update_multipart_info_failure(
message_id, smpp_message_id)
event_info = yield self.message_stash.get_multipart_event_info(
message_id, 'fail', smpp_message_id)
event_required, event_type, remote_id = event_info
if event_required:
yield self.process_submit_sm_event(
message_id, event_type, remote_id, command_status)
def handle_raw_inbound_message(self, **kwargs):
# TODO: drop the kwargs, list the allowed key word arguments
# explicitly with sensible defaults.
message_type = kwargs.get('message_type', 'sms')
message = {
'message_id': uuid4().hex,
'to_addr': kwargs['destination_addr'],
'from_addr': kwargs['source_addr'],
'content': kwargs['short_message'],
'transport_type': message_type,
'transport_metadata': {},
}
if message_type == 'ussd':
session_event = {
'new': TransportUserMessage.SESSION_NEW,
'continue': TransportUserMessage.SESSION_RESUME,
'close': TransportUserMessage.SESSION_CLOSE,
}[kwargs['session_event']]
message['session_event'] = session_event
session_info = kwargs.get('session_info')
message['transport_metadata']['session_info'] = session_info
# TODO: This logs messages that fail to serialize to JSON
# Usually this happens when an SMPP message has content
# we can't decode (e.g. data_coding == 4). We should
# remove the try-except once we handle such messages
# better.
return self.publish_message(**message).addErrback(log.err)
@inlineCallbacks
def handle_delivery_report(self, receipted_message_id, delivery_status):
message_id = yield self.message_stash.get_internal_message_id(
receipted_message_id)
if message_id is None:
log.warning("Failed to retrieve message id for delivery report."
" Delivery report from %s discarded."
% self.transport_name)
return
dr = yield self.publish_delivery_report(
user_message_id=message_id,
delivery_status=delivery_status)
if delivery_status in ('delivered', 'failed'):
yield self.message_stash.expire_remote_message_id(
receipted_message_id)
returnValue(dr)
class SmppReceiverTransport(SmppTransceiverTransport):
bind_type = 'RX'
class SmppTransmitterTransport(SmppTransceiverTransport):
bind_type = 'TX'
class SmppTransceiverTransportWithOldConfig(SmppTransceiverTransport):
CONFIG_CLASS = OldSmppTransportConfig
NEW_CONFIG_CLASS = SmppTransportConfig
def __init__(self, *args, **kwargs):
super(SmppTransceiverTransportWithOldConfig, self).__init__(*args,
**kwargs)
warnings.warn(
'This is a transport using a deprecated config file. '
'Please use the new SmppTransceiverTransport, '
'SmppTransmitterTransport or SmppReceiverTransport '
'with the new processor aware SmppTransportConfig.',
category=PendingDeprecationWarning)
def get_static_config(self):
# return if cached
if hasattr(self, '_converted_static_config'):
return self._converted_static_config
cfg = super(
SmppTransceiverTransportWithOldConfig, self).get_static_config()
original = cfg._config_data.copy()
config = convert_to_new_config(
original,
'vumi.transports.smpp.processors.DeliveryReportProcessor',
'vumi.transports.smpp.processors.SubmitShortMessageProcessor',
'vumi.transports.smpp.processors.DeliverShortMessageProcessor'
)
self._converted_static_config = self.NEW_CONFIG_CLASS(
config, static=True)
return self._converted_static_config