def __init__(self, add_trans_queue, global_update_queue, listen_port=5060):
'''
@type add_trans_queue: Queue
@param add_trans_queue: A queue that this class will listen on for
tuples of the form identical to the parameters to the
add_transaction method of this class except with an extra parameter
at the start that can be False to indicate to this class to shutdown
or True otherwise. The data this queue receives will be added to the
transaction list this class is monitoring
@type global_update_queue: Queue
@param global_update_queue: A queue that will receive a SIPTransaction
object every time an update from the network arrives for that
SIPTransaction
'''
self.add_trans_queue = add_trans_queue
self.global_update_queue = global_update_queue
self.listen_port = listen_port
self.lock = thread.allocate_lock()
self.transceiver = UDPTransceiver([self.listen_port], self.lock)
self.transceiver.add_notify_queue(self.add_trans_queue,
self.listen_port)
self.transceiver.listen(True)
# A dictionary mapping branch values to SIPTransaction objects
self.transaction_dict = {}
self.sip_parser = SIPParser()
threading.Thread.__init__(self)
def __init__(self, add_trans_queue, global_update_queue, listen_port=5060):
'''
@type add_trans_queue: Queue
@param add_trans_queue: A queue that this class will listen on for
tuples of the form identical to the parameters to the
add_transaction method of this class except with an extra parameter
at the start that can be False to indicate to this class to shutdown
or True otherwise. The data this queue receives will be added to the
transaction list this class is monitoring
@type global_update_queue: Queue
@param global_update_queue: A queue that will receive a SIPTransaction
object every time an update from the network arrives for that
SIPTransaction
'''
self.add_trans_queue = add_trans_queue
self.global_update_queue = global_update_queue
self.listen_port = listen_port
self.lock = thread.allocate_lock()
self.transceiver = UDPTransceiver([self.listen_port], self.lock)
self.transceiver.add_notify_queue(self.add_trans_queue, self.listen_port)
self.transceiver.listen(True)
# A dictionary mapping branch values to SIPTransaction objects
self.transaction_dict = {}
self.sip_parser = SIPParser()
threading.Thread.__init__(self)
class SIPTransactionManager(threading.Thread):
def __init__(self, add_trans_queue, global_update_queue, listen_port=5060):
'''
@type add_trans_queue: Queue
@param add_trans_queue: A queue that this class will listen on for
tuples of the form identical to the parameters to the
add_transaction method of this class except with an extra parameter
at the start that can be False to indicate to this class to shutdown
or True otherwise. The data this queue receives will be added to the
transaction list this class is monitoring
@type global_update_queue: Queue
@param global_update_queue: A queue that will receive a SIPTransaction
object every time an update from the network arrives for that
SIPTransaction
'''
self.add_trans_queue = add_trans_queue
self.global_update_queue = global_update_queue
self.listen_port = listen_port
self.lock = thread.allocate_lock()
self.transceiver = UDPTransceiver([self.listen_port], self.lock)
self.transceiver.add_notify_queue(self.add_trans_queue,
self.listen_port)
self.transceiver.listen(True)
# A dictionary mapping branch values to SIPTransaction objects
self.transaction_dict = {}
self.sip_parser = SIPParser()
threading.Thread.__init__(self)
def run(self):
while True:
new_trans_tuple = None
try:
new_trans_tuple = self.add_trans_queue.get()
except:
pass
if new_trans_tuple != None:
#print >> sys.stderr, 'TM: Got data'
if new_trans_tuple[0] == False:
#signal to listener first to exit
print >> stderr, 'tm returning cause tuple thingy was false'
print >> stderr, new_trans_tuple
return
else:
data = new_trans_tuple[1]
source = new_trans_tuple[2]
addr = new_trans_tuple[3]
timeout = new_trans_tuple[4]
socket = None
# only interested in the socket if the data came from
# a source outside the core. Sources inside the core
# will be monitored by default
if source == EXTERNAL:
socket = new_trans_tuple[5]
elif source == GENERATOR:
print >> sys.stderr, 'got something from generator off queue'
self.add_data_to_transactions(data, source, addr,\
timeout, socket)
def add_data_to_transactions(self,
data,
source,
addr,
timeout,
socket=None):
data_dict = self.sip_parser.parse(data)
# no branch no fun
if data_dict.has_key(sip_parser.BRANCH):
t_data = TData(data, data_dict, source, addr, socket)
self.add_transaction(t_data, timeout=timeout)
def add_transaction(self, t_data, timeout=None):
'''
Function to add a SIP transaction to the list of the transactions
this manager is taking care of. If a transaction with this branch
already exists then this data and queue are appended to their lists
and all other fields in the old sip_transaction are updated to
the new values.
If not a new SIPTransaction object is created with the provided details
and added to the list.
@type t_data: TData
@param data: A TData object representing the data, its parsed fields and
its origin
@type timeout: Integer
@param timeout: A timeout after which this transaction will no
longer be monitored
'''
# parse all fields
timestamp = time.time()
data_dict = t_data.p_data
# First identify the transaction the data is for or create a new
# transaction for it
t_data_added = False
if self.transaction_dict.has_key(data_dict[sip_parser.BRANCH]):
sip_t = self.transaction_dict[data_dict[sip_parser.BRANCH]]
t_data_added = sip_t.add_response(t_data)
if timeout: sip_t.timeout = timeout
else:
# If the source is the network then check that the request is
# of a type that is allowed to create a new transaction. For
# now we only allow a few types. More may be added in the future if required
try:
r_code = data_dict[sip_parser.RCODE]
except KeyError:
# Some of our fuzz requests will not have a request code
# matching the defined pattern due to fuzzing but thats OK
r_code = -1
if t_data.source != NETWORK or (r_code <= sip_parser.r_INVITE
and r_code >= sip_parser.r_CANCEL):
sip_t = SIPTransaction(data_dict[sip_parser.BRANCH], [t_data], \
timestamp, timeout)
self.transaction_dict[data_dict[sip_parser.BRANCH]] = sip_t
else:
return
# Now perform some actions based on the source of the data
if t_data.source == GENERATOR:
# Data was generated by the SIP backend. Send it and add the socket
# used to the list being monitored
print >> sys.stderr, 'Source is generator. Sending'
send_sock = self.transceiver.send(t_data.data, t_data.addr)
if send_sock:
sip_t.sockets.append(send_sock)
elif t_data.source == NETWORK and t_data_added:
# Data originated from another node on the network. Put on the
# notify queue. A copy is used in case another update arrives
# before this one is processed and cloaks this one in the t_data list
self.global_update_queue.put(deepcopy(sip_t))
elif t_data.source == EXTERNAL:
# Data came from an external source e.g the fuzzer and has already
# been sent. We just need to monitor for responses
if t_data.socket:
sip_t.sockets.append(t_data.socket)
self.transceiver.add_socket(t_data.socket)
self.__check_timeouts()
def __check_timeouts(self):
'''
Checks to see if any of the transactions have timed out and Removes
them if so
'''
curr_time = time.time()
print >> sys.stderr, 'TM: %d transactions being monitored' % len(
self.transaction_dict)
for branch in self.transaction_dict.keys():
transaction = self.transaction_dict[branch]
if curr_time - transaction.timestamp >= transaction.timeout:
for sock in transaction.sockets:
self.transceiver.close_socket(sock)
del self.transaction_dict[branch]
def unregister_from_transceiver(self):
'''
Function to remove this transaction managers queue from the
list of queues registered with the transceiver
'''
self.transceiver.remove_notify_queue(
(self.incoming_data_queue, self.listen_port))
's=Opal SIP Session', 'c=IN IP4 192.168.3.102', 't=0 0', 'm=audio 5040 RTP/AVP 101 96 3 107 110 0 8', 'a=rtpmap:101 telephone-event/8000', 'a=fmtp:101 0-15', 'a=rtpmap:96 SPEEX/-1', 'a=rtpmap:3 GSM/8000', 'a=rtpmap:107 MS-GSM/8000', 'a=rtpmap:110 SPEEX/-1', 'a=rtpmap:0 PCMU/8000', 'a=rtpmap:8 PCMA/8000', 'm=video 5042 RTP/AVP 31', 'a=rtpmap:31 H261/-1']) + '\r\n' cancel1 = '\r\n'.join(['CANCEL sip:[email protected] SIP/2.0', 'CSeq: 1 CANCEL', 'Via: SIP/2.0/UDP 192.168.3.102:5071;branch=z9hG4bKa8f5f4da-d867-dc11-8c7d-000c29da463b;rport', 'To: <sip:[email protected]>', 'From: "nnp nnp" <sip:[email protected]>;tag=a68cf4d7-d867-dc11-8c7d-000c29da463b', 'Call-ID: MOFOID@ubuntu', 'Max-Forwards: 70']) + '\r\n\r\n' data_dict = SIPParser().parse(invite1) t_data = TData(invite1, data_dict, None) s_canceler= SIPCanceler(None, None) cancel_request = s_canceler.create_cancel(t_data) assert(cancel_request == cancel1)
class SIPTransactionManager(threading.Thread):
def __init__(self, add_trans_queue, global_update_queue, listen_port=5060):
'''
@type add_trans_queue: Queue
@param add_trans_queue: A queue that this class will listen on for
tuples of the form identical to the parameters to the
add_transaction method of this class except with an extra parameter
at the start that can be False to indicate to this class to shutdown
or True otherwise. The data this queue receives will be added to the
transaction list this class is monitoring
@type global_update_queue: Queue
@param global_update_queue: A queue that will receive a SIPTransaction
object every time an update from the network arrives for that
SIPTransaction
'''
self.add_trans_queue = add_trans_queue
self.global_update_queue = global_update_queue
self.listen_port = listen_port
self.lock = thread.allocate_lock()
self.transceiver = UDPTransceiver([self.listen_port], self.lock)
self.transceiver.add_notify_queue(self.add_trans_queue, self.listen_port)
self.transceiver.listen(True)
# A dictionary mapping branch values to SIPTransaction objects
self.transaction_dict = {}
self.sip_parser = SIPParser()
threading.Thread.__init__(self)
def run(self):
while True:
new_trans_tuple = None
try:
new_trans_tuple = self.add_trans_queue.get()
except:
pass
if new_trans_tuple != None:
#print >> sys.stderr, 'TM: Got data'
if new_trans_tuple[0] == False:
#signal to listener first to exit
print >>stderr, 'tm returning cause tuple thingy was false'
print >>stderr, new_trans_tuple
return
else:
data = new_trans_tuple[1]
source = new_trans_tuple[2]
addr = new_trans_tuple[3]
timeout = new_trans_tuple[4]
socket = None
# only interested in the socket if the data came from
# a source outside the core. Sources inside the core
# will be monitored by default
if source == EXTERNAL:
socket = new_trans_tuple[5]
elif source == GENERATOR:
print >>sys.stderr, 'got something from generator off queue'
self.add_data_to_transactions(data, source, addr,\
timeout, socket)
def add_data_to_transactions(self, data, source, addr, timeout, socket=None):
data_dict = self.sip_parser.parse(data)
# no branch no fun
if data_dict.has_key(sip_parser.BRANCH):
t_data = TData(data, data_dict, source, addr, socket)
self.add_transaction(t_data, timeout=timeout)
def add_transaction(self, t_data, timeout=None):
'''
Function to add a SIP transaction to the list of the transactions
this manager is taking care of. If a transaction with this branch
already exists then this data and queue are appended to their lists
and all other fields in the old sip_transaction are updated to
the new values.
If not a new SIPTransaction object is created with the provided details
and added to the list.
@type t_data: TData
@param data: A TData object representing the data, its parsed fields and
its origin
@type timeout: Integer
@param timeout: A timeout after which this transaction will no
longer be monitored
'''
# parse all fields
timestamp = time.time()
data_dict = t_data.p_data
# First identify the transaction the data is for or create a new
# transaction for it
t_data_added = False
if self.transaction_dict.has_key(data_dict[sip_parser.BRANCH]):
sip_t = self.transaction_dict[data_dict[sip_parser.BRANCH]]
t_data_added = sip_t.add_response(t_data)
if timeout: sip_t.timeout = timeout
else:
# If the source is the network then check that the request is
# of a type that is allowed to create a new transaction. For
# now we only allow a few types. More may be added in the future if required
try:
r_code = data_dict[sip_parser.RCODE]
except KeyError:
# Some of our fuzz requests will not have a request code
# matching the defined pattern due to fuzzing but thats OK
r_code = -1
if t_data.source != NETWORK or (r_code <= sip_parser.r_INVITE and
r_code >= sip_parser.r_CANCEL):
sip_t = SIPTransaction(data_dict[sip_parser.BRANCH], [t_data], \
timestamp, timeout)
self.transaction_dict[data_dict[sip_parser.BRANCH]] = sip_t
else:
return
# Now perform some actions based on the source of the data
if t_data.source == GENERATOR:
# Data was generated by the SIP backend. Send it and add the socket
# used to the list being monitored
print >> sys.stderr, 'Source is generator. Sending'
send_sock = self.transceiver.send(t_data.data, t_data.addr)
if send_sock:
sip_t.sockets.append(send_sock)
elif t_data.source == NETWORK and t_data_added:
# Data originated from another node on the network. Put on the
# notify queue. A copy is used in case another update arrives
# before this one is processed and cloaks this one in the t_data list
self.global_update_queue.put(deepcopy(sip_t))
elif t_data.source == EXTERNAL:
# Data came from an external source e.g the fuzzer and has already
# been sent. We just need to monitor for responses
if t_data.socket:
sip_t.sockets.append(t_data.socket)
self.transceiver.add_socket(t_data.socket)
self.__check_timeouts()
def __check_timeouts(self):
'''
Checks to see if any of the transactions have timed out and Removes
them if so
'''
curr_time = time.time()
print >>sys.stderr, 'TM: %d transactions being monitored' % len(self.transaction_dict)
for branch in self.transaction_dict.keys():
transaction = self.transaction_dict[branch]
if curr_time - transaction.timestamp >= transaction.timeout:
for sock in transaction.sockets:
self.transceiver.close_socket(sock)
del self.transaction_dict[branch]
def unregister_from_transceiver(self):
'''
Function to remove this transaction managers queue from the
list of queues registered with the transceiver
'''
self.transceiver.remove_notify_queue((self.incoming_data_queue, self.listen_port))