def process_message(self, message, sender):
if sender in self.bad_peers:
return -1
if self.is_current_message_from_splitter() or self.check_message(message, sender):
if self.is_control_message(message) and message == 'B':
return self.handle_bad_peers_request()
else:
return Peer_DBS.process_message(self, message, sender)
else:
self.process_bad_message(message, sender)
return -1
def process_message(self, message, sender):
if sender in self.bad_peers:
return -1
if self.is_current_message_from_splitter() or self.check_message(message, sender):
if self.is_control_message(message) and message == 'B':
return self.handle_bad_peers_request()
else:
return Peer_DBS.process_message(self, message, sender)
else:
self.process_bad_message(message, sender)
return -1
def process_message(self, message, sender):
# {{{ Handle NTS messages; pass other messages to base class
if sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("4sHHH"):
# say [hello to (X)] received from splitter
peer_id = message[:Common.PEER_ID_LENGTH].decode()
IP_addr, source_port_to_splitter, port_diff, peer_number = \
struct.unpack("4sHHH", message[Common.PEER_ID_LENGTH:])
IP_addr = socket.inet_ntoa(IP_addr)
source_port_to_splitter = socket.ntohs(source_port_to_splitter)
port_diff = socket.ntohs(port_diff)
peer_number = socket.ntohs(peer_number)
peer = (IP_addr, source_port_to_splitter) # Endpoint to splitter
_p_("Received [send hello to %s %s]" % (peer_id, peer))
_p_("port_diff = %s" % port_diff)
_p_("peer_number = %s" % peer_number)
# Here the port prediction happens:
additional_ports = \
self.get_probable_source_ports(source_port_to_splitter,
port_diff, peer_number)
self.say_hello(peer, additional_ports)
# Directly start packet sending
self.hello_messages_event.set()
elif sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("4sHHHH"):
# say [hello to (X)] received from splitter
peer_id = message[:Common.PEER_ID_LENGTH].decode()
IP_addr, source_port_to_splitter, port_diff, peer_number, \
extra_splitter_port = struct.unpack( \
"4sHHHH", message[Common.PEER_ID_LENGTH:]) # Ojo, !H ????
IP_addr = socket.inet_ntoa(IP_addr)
source_port_to_splitter = socket.ntohs(source_port_to_splitter)
port_diff = socket.ntohs(port_diff)
peer_number = socket.ntohs(peer_number)
extra_splitter_port = socket.ntohs(extra_splitter_port)
peer = (IP_addr, source_port_to_splitter) # Endpoint to splitter
_p_("Received [send hello to %s %s]" % (peer_id, peer))
# Here the port prediction happens:
additional_ports = \
self.get_probable_source_ports(source_port_to_splitter,
port_diff, peer_number)
self.say_hello(peer, additional_ports)
# Send to extra splitter port to determine currently allocated
# source port
self.say_hello((self.splitter[0], extra_splitter_port))
# Directly start packet sending
self.hello_messages_event.set()
elif message == self.peer_id.encode() or (sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("H")) or \
(sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH+1 + struct.calcsize("H")) or \
len(message) == Common.PEER_ID_LENGTH+1: # All sent message sizes
# Acknowledge received; stop sending the message
with self.hello_messages_lock:
for hello_data in self.hello_messages:
if message == hello_data[0] \
and sender[0] == hello_data[1][0] \
and sender[1] in self.hello_messages_ports[hello_data]:
_p_("Received acknowledge from %s" % (sender, ))
self.hello_messages.remove(hello_data)
del self.hello_messages_times[hello_data]
del self.hello_messages_ports[hello_data]
# No chunk number, as no chunk was received
return -1
_print_(Common.NTS_COLOR +
"NTS: Received acknowledge from unknown host %s" %
(sender, ) + Color.none)
elif len(message) == Common.PEER_ID_LENGTH:
peer_id = message.decode()
_p_("Received [hello (ID %s)] from %s" % (message, sender))
# Send acknowledge
self.team_socket.sendto(message, sender)
if sender not in self.peer_list:
_p_("Appending peer %s %s to list" % (peer_id, sender))
self.peer_list.append(sender)
self.debt[sender] = 0
# Send source port information to splitter
message += struct.pack("H", socket.htons(sender[1]))
message_data = (message, self.splitter)
self.send_message(message_data)
if peer_id in self.initial_peer_list:
self.initial_peer_list.remove(peer_id)
elif message == b'H':
_p_("Received [DBS hello] from %s" % str(sender))
# Ignore hello messages that are sent by Peer_DBS instances in
# receive_the_list_of_peers() before a Peer_NTS instance is created
pass
elif sender != self.splitter and sender not in self.peer_list:
_p_("Ignoring message of length %d from unknown %s" \
% (len(message), sender))
elif len(self.initial_peer_list) == 0:
# Start receiving chunks when fully incorporated
return Peer_DBS.process_message(self, message, sender)
# No chunk number, as no chunk was received
return -1
def process_message(self, message, sender):
# {{{ Handle NTS messages; pass other messages to base class
if sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("4sHHH"):
# say [hello to (X)] received from splitter
peer_id = message[:Common.PEER_ID_LENGTH].decode()
IP_addr, source_port_to_splitter, port_diff, peer_number = \
struct.unpack("4sHHH", message[Common.PEER_ID_LENGTH:])
IP_addr = socket.inet_ntoa(IP_addr)
source_port_to_splitter = socket.ntohs(source_port_to_splitter)
port_diff = socket.ntohs(port_diff)
peer_number = socket.ntohs(peer_number)
peer = (IP_addr, source_port_to_splitter) # Endpoint to splitter
_p_("Received [send hello to %s %s]" % (peer_id, peer))
_p_("port_diff = %s" % port_diff)
_p_("peer_number = %s" % peer_number)
# Here the port prediction happens:
additional_ports = \
self.get_probable_source_ports(source_port_to_splitter,
port_diff, peer_number)
self.say_hello(peer, additional_ports)
# Directly start packet sending
self.hello_messages_event.set()
elif sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("4sHHHH"):
# say [hello to (X)] received from splitter
peer_id = message[:Common.PEER_ID_LENGTH].decode()
IP_addr, source_port_to_splitter, port_diff, peer_number, \
extra_splitter_port = struct.unpack( \
"4sHHHH", message[Common.PEER_ID_LENGTH:]) # Ojo, !H ????
IP_addr = socket.inet_ntoa(IP_addr)
source_port_to_splitter = socket.ntohs(source_port_to_splitter)
port_diff = socket.ntohs(port_diff)
peer_number = socket.ntohs(peer_number)
extra_splitter_port = socket.ntohs(extra_splitter_port)
peer = (IP_addr, source_port_to_splitter) # Endpoint to splitter
_p_("Received [send hello to %s %s]" % (peer_id, peer))
# Here the port prediction happens:
additional_ports = \
self.get_probable_source_ports(source_port_to_splitter,
port_diff, peer_number)
self.say_hello(peer, additional_ports)
# Send to extra splitter port to determine currently allocated
# source port
self.say_hello((self.splitter[0], extra_splitter_port))
# Directly start packet sending
self.hello_messages_event.set()
elif message == self.peer_id.encode() or (sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH + struct.calcsize("H")) or \
(sender == self.splitter and \
len(message) == Common.PEER_ID_LENGTH+1 + struct.calcsize("H")) or \
len(message) == Common.PEER_ID_LENGTH+1: # All sent message sizes
# Acknowledge received; stop sending the message
with self.hello_messages_lock:
for hello_data in self.hello_messages:
if message == hello_data[0] \
and sender[0] == hello_data[1][0] \
and sender[1] in self.hello_messages_ports[hello_data]:
_p_("Received acknowledge from %s" % (sender,))
self.hello_messages.remove(hello_data)
del self.hello_messages_times[hello_data]
del self.hello_messages_ports[hello_data]
# No chunk number, as no chunk was received
return -1
_print_(Common.NTS_COLOR + "NTS: Received acknowledge from unknown host %s" % (sender,) + Color.none)
elif len(message) == Common.PEER_ID_LENGTH:
peer_id = message.decode()
_p_("Received [hello (ID %s)] from %s" % (message, sender))
# Send acknowledge
self.team_socket.sendto(message, sender)
if sender not in self.peer_list:
_p_("Appending peer %s %s to list" % (peer_id, sender))
self.peer_list.append(sender)
self.debt[sender] = 0
# Send source port information to splitter
message += struct.pack("H", socket.htons(sender[1]))
message_data = (message, self.splitter)
self.send_message(message_data)
if peer_id in self.initial_peer_list:
self.initial_peer_list.remove(peer_id)
elif message == b'H':
_p_("Received [DBS hello] from %s" % str(sender))
# Ignore hello messages that are sent by Peer_DBS instances in
# receive_the_list_of_peers() before a Peer_NTS instance is created
pass
elif sender != self.splitter and sender not in self.peer_list:
_p_("Ignoring message of length %d from unknown %s" \
% (len(message), sender))
elif len(self.initial_peer_list) == 0:
# Start receiving chunks when fully incorporated
return Peer_DBS.process_message(self, message, sender)
# No chunk number, as no chunk was received
return -1
