319 lines
10 KiB
Python
319 lines
10 KiB
Python
import logging, socket, time
|
|
from cStringIO import StringIO
|
|
import gevent, msgpack
|
|
from Config import config
|
|
from Debug import Debug
|
|
zmq = None
|
|
if not config.disable_zeromq:
|
|
try:
|
|
import zmq.green as zmq
|
|
except:
|
|
zmq = None
|
|
|
|
|
|
|
|
class Connection:
|
|
def __init__(self, server, ip, port, sock=None):
|
|
self.sock = sock
|
|
self.ip = ip
|
|
self.port = port
|
|
self.peer_id = None # Bittorrent style peer id (not used yet)
|
|
self.id = server.last_connection_id
|
|
server.last_connection_id += 1
|
|
self.protocol = "?"
|
|
self.type = "?"
|
|
|
|
self.server = server
|
|
self.unpacker = None # Stream incoming socket messages here
|
|
self.req_id = 0 # Last request id
|
|
self.handshake = {} # Handshake info got from peer
|
|
self.connected = False
|
|
self.event_connected = gevent.event.AsyncResult() # Solves on handshake received
|
|
self.closed = False
|
|
|
|
self.zmq_sock = None # Zeromq sock if outgoing connection
|
|
self.zmq_queue = [] # Messages queued to send
|
|
self.zmq_working = False # Zmq currently working, just add to queue
|
|
self.forward_thread = None # Zmq forwarder thread
|
|
|
|
# Stats
|
|
self.start_time = time.time()
|
|
self.last_recv_time = 0
|
|
self.last_message_time = 0
|
|
self.last_send_time = 0
|
|
self.last_sent_time = 0
|
|
self.incomplete_buff_recv = 0
|
|
self.bytes_recv = 0
|
|
self.bytes_sent = 0
|
|
self.last_ping_delay = None
|
|
self.last_req_time = 0
|
|
self.last_cmd = None
|
|
|
|
self.name = None
|
|
self.updateName()
|
|
|
|
self.waiting_requests = {} # Waiting sent requests
|
|
|
|
|
|
def updateName(self):
|
|
self.name = "Conn#%2s %-12s [%s]" % (self.id, self.ip, self.protocol)
|
|
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
def __repr__(self):
|
|
return "<%s>" % self.__str__()
|
|
|
|
|
|
def log(self, text):
|
|
self.server.log.debug("%s > %s" % (self.name, text))
|
|
|
|
|
|
# Open connection to peer and wait for handshake
|
|
def connect(self):
|
|
self.log("Connecting...")
|
|
self.type = "out"
|
|
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
self.sock.connect((self.ip, int(self.port)))
|
|
# Detect protocol
|
|
self.send({"cmd": "handshake", "req_id": 0, "params": self.handshakeInfo()})
|
|
gevent.spawn(self.messageLoop)
|
|
return self.event_connected.get() # Wait for first char
|
|
|
|
|
|
|
|
# Handle incoming connection
|
|
def handleIncomingConnection(self, sock):
|
|
self.type = "in"
|
|
try:
|
|
firstchar = sock.recv(1) # Find out if pure socket or zeromq
|
|
except Exception, err:
|
|
self.log("Socket firstchar error: %s" % Debug.formatException(err))
|
|
self.close()
|
|
return False
|
|
if firstchar == "\xff": # Backward compatiblity: forward data to zmq
|
|
if config.debug_socket: self.log("Fallback incoming connection to ZeroMQ")
|
|
|
|
self.protocol = "zeromq"
|
|
self.updateName()
|
|
self.connected = True
|
|
self.event_connected.set(self.protocol)
|
|
|
|
if self.server.zmq_running:
|
|
zmq_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
zmq_sock.connect(("127.0.0.1", self.server.zmq_port))
|
|
zmq_sock.send(firstchar)
|
|
|
|
self.forward_thread = gevent.spawn(self.server.forward, self, zmq_sock, sock)
|
|
self.server.forward(self, sock, zmq_sock)
|
|
self.close() # Forward ended close connection
|
|
else:
|
|
self.log("ZeroMQ Server not running, exiting!")
|
|
else: # Normal socket
|
|
self.messageLoop(firstchar)
|
|
|
|
|
|
# Message loop for connection
|
|
def messageLoop(self, firstchar=None):
|
|
sock = self.sock
|
|
try:
|
|
if not firstchar: firstchar = sock.recv(1)
|
|
except Exception, err:
|
|
self.log("Socket firstchar error: %s" % Debug.formatException(err))
|
|
self.close()
|
|
return False
|
|
if firstchar == "\xff": # Backward compatibility to zmq
|
|
self.sock.close() # Close normal socket
|
|
del firstchar
|
|
if zmq:
|
|
if config.debug_socket: self.log("Connecting as ZeroMQ")
|
|
self.protocol = "zeromq"
|
|
self.updateName()
|
|
self.connected = True
|
|
self.event_connected.set(self.protocol) # Mark handshake as done
|
|
|
|
try:
|
|
context = zmq.Context()
|
|
zmq_sock = context.socket(zmq.REQ)
|
|
zmq_sock.hwm = 1
|
|
zmq_sock.setsockopt(zmq.RCVTIMEO, 50000) # Wait for data arrive
|
|
zmq_sock.setsockopt(zmq.SNDTIMEO, 5000) # Wait for data send
|
|
zmq_sock.setsockopt(zmq.LINGER, 500) # Wait for zmq_sock close
|
|
zmq_sock.connect('tcp://%s:%s' % (self.ip, self.port))
|
|
self.zmq_sock = zmq_sock
|
|
except Exception, err:
|
|
if not self.closed: self.log("Socket error: %s" % Debug.formatException(err))
|
|
else:
|
|
return False # No zeromq connection supported
|
|
else: # Normal socket
|
|
self.protocol = "v2"
|
|
self.updateName()
|
|
self.connected = True
|
|
self.event_connected.set(self.protocol) # Mark handshake as done
|
|
|
|
self.unpacker = msgpack.Unpacker()
|
|
self.unpacker.feed(firstchar) # Feed the first char we already requested
|
|
try:
|
|
while True:
|
|
buff = sock.recv(16*1024)
|
|
if not buff: break # Connection closed
|
|
self.last_recv_time = time.time()
|
|
self.incomplete_buff_recv += 1
|
|
self.bytes_recv += len(buff)
|
|
self.server.bytes_recv += len(buff)
|
|
if not self.unpacker:
|
|
self.unpacker = msgpack.Unpacker()
|
|
self.unpacker.feed(buff)
|
|
for message in self.unpacker:
|
|
self.incomplete_buff_recv = 0
|
|
self.handleMessage(message)
|
|
message = None
|
|
buf = None
|
|
except Exception, err:
|
|
if not self.closed: self.log("Socket error: %s" % Debug.formatException(err))
|
|
self.close() # MessageLoop ended, close connection
|
|
|
|
|
|
# My handshake info
|
|
def handshakeInfo(self):
|
|
return {
|
|
"version": config.version,
|
|
"protocol": "v2",
|
|
"peer_id": self.server.peer_id,
|
|
"fileserver_port": config.fileserver_port,
|
|
"port_opened": self.server.port_opened
|
|
}
|
|
|
|
|
|
# Handle incoming message
|
|
def handleMessage(self, message):
|
|
self.last_message_time = time.time()
|
|
if message.get("cmd") == "response": # New style response
|
|
if message["to"] in self.waiting_requests:
|
|
self.waiting_requests[message["to"]].set(message) # Set the response to event
|
|
del self.waiting_requests[message["to"]]
|
|
elif message["to"] == 0: # Other peers handshake
|
|
ping = time.time()-self.start_time
|
|
if config.debug_socket: self.log("Got handshake response: %s, ping: %s" % (message, ping))
|
|
self.last_ping_delay = ping
|
|
self.handshake = message
|
|
if self.handshake.get("port_opened", None) == False: # Not connectable
|
|
self.port = 0
|
|
else:
|
|
self.port = message["fileserver_port"] # Set peer fileserver port
|
|
else:
|
|
self.log("Unknown response: %s" % message)
|
|
elif message.get("cmd"): # Handhsake request
|
|
if message["cmd"] == "handshake":
|
|
self.handshake = message["params"]
|
|
if self.handshake.get("port_opened", None) == False: # Not connectable
|
|
self.port = 0
|
|
else:
|
|
self.port = self.handshake["fileserver_port"] # Set peer fileserver port
|
|
if config.debug_socket: self.log("Handshake request: %s" % message)
|
|
data = self.handshakeInfo()
|
|
data["cmd"] = "response"
|
|
data["to"] = message["req_id"]
|
|
self.send(data)
|
|
else:
|
|
self.server.handleRequest(self, message)
|
|
else: # Old style response, no req_id definied
|
|
if config.debug_socket: self.log("Old style response, waiting: %s" % self.waiting_requests.keys())
|
|
last_req_id = min(self.waiting_requests.keys()) # Get the oldest waiting request and set it true
|
|
self.waiting_requests[last_req_id].set(message)
|
|
del self.waiting_requests[last_req_id] # Remove from waiting request
|
|
|
|
|
|
|
|
# Send data to connection
|
|
def send(self, message):
|
|
if config.debug_socket: self.log("Send: %s, to: %s, site: %s, inner_path: %s, req_id: %s" % (message.get("cmd"), message.get("to"), message.get("params", {}).get("site"), message.get("params", {}).get("inner_path"), message.get("req_id")))
|
|
self.last_send_time = time.time()
|
|
if self.protocol == "zeromq":
|
|
if self.zmq_sock: # Outgoing connection
|
|
self.zmq_queue.append(message)
|
|
if self.zmq_working:
|
|
self.log("ZeroMQ already working...")
|
|
return
|
|
while self.zmq_queue:
|
|
self.zmq_working = True
|
|
message = self.zmq_queue.pop(0)
|
|
self.zmq_sock.send(msgpack.packb(message))
|
|
self.handleMessage(msgpack.unpackb(self.zmq_sock.recv()))
|
|
self.zmq_working = False
|
|
|
|
else: # Incoming request
|
|
self.server.zmq_sock.send(msgpack.packb(message))
|
|
else: # Normal connection
|
|
data = msgpack.packb(message)
|
|
self.bytes_sent += len(data)
|
|
self.server.bytes_sent += len(data)
|
|
self.sock.sendall(data)
|
|
self.last_sent_time = time.time()
|
|
return True
|
|
|
|
|
|
# Create and send a request to peer
|
|
def request(self, cmd, params={}):
|
|
if self.waiting_requests and self.protocol == "v2" and time.time() - max(self.last_req_time, self.last_recv_time) > 10: # Last command sent more than 10 sec ago, timeout
|
|
self.log("Request %s timeout: %s" % (self.last_cmd, time.time() - self.last_send_time))
|
|
self.close()
|
|
return False
|
|
|
|
self.last_req_time = time.time()
|
|
self.last_cmd = cmd
|
|
self.req_id += 1
|
|
data = {"cmd": cmd, "req_id": self.req_id, "params": params}
|
|
event = gevent.event.AsyncResult() # Create new event for response
|
|
self.waiting_requests[self.req_id] = event
|
|
self.send(data) # Send request
|
|
res = event.get() # Wait until event solves
|
|
return res
|
|
|
|
|
|
def ping(self):
|
|
s = time.time()
|
|
response = None
|
|
with gevent.Timeout(10.0, False):
|
|
try:
|
|
response = self.request("ping")
|
|
except Exception, err:
|
|
self.log("Ping error: %s" % Debug.formatException(err))
|
|
if response and "body" in response and response["body"] == "Pong!":
|
|
self.last_ping_delay = time.time()-s
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
|
|
|
|
# Close connection
|
|
def close(self):
|
|
if self.closed: return False # Already closed
|
|
self.closed = True
|
|
self.connected = False
|
|
self.event_connected.set(False)
|
|
|
|
if config.debug_socket: self.log("Closing connection, waiting_requests: %s, buff: %s..." % (len(self.waiting_requests), self.incomplete_buff_recv))
|
|
for request in self.waiting_requests.values(): # Mark pending requests failed
|
|
request.set(False)
|
|
self.waiting_requests = {}
|
|
self.server.removeConnection(self) # Remove connection from server registry
|
|
try:
|
|
if self.forward_thread:
|
|
self.forward_thread.kill(exception=Debug.Notify("Closing connection"))
|
|
if self.zmq_sock:
|
|
self.zmq_sock.close()
|
|
if self.sock:
|
|
self.sock.shutdown(gevent.socket.SHUT_WR)
|
|
self.sock.close()
|
|
except Exception, err:
|
|
if config.debug_socket: self.log("Close error: %s" % Debug.formatException(err))
|
|
|
|
# Little cleanup
|
|
del self.unpacker
|
|
del self.sock
|
|
self.unpacker = None
|