class Bus(common.AutoClose):
"""
An Autobus bus. Busses manage a set of published services, and allow
connecting to other services. A single bus listens on a single TCP
port and multiplexes all published services over it.
Bus is a subclass of ServiceProvider; the service it provides is a service
exposing information about what other services, events, functions, and
objects are present. (This service is more commonly known as the
introspection service.) You normally won't have to know this; instances of
Bus register themselves as services with themselves, so you don't need to
do anything to make the introspection service work.
"""
def __init__(self, default_discoverers=True, default_publishers=True,
port=None):
"""
Creates a new bus. The bus will listen on the specified port; if none
is specified (which is the usual case), a port will be chosen from the
ports not currently in use on this computer.
If default_discoverers is True (the default), a default set of
discoverers will be installed, and likewise for default_publishers.
Right now, this simply installs a autobus2.discovery.BroadcastPublisher
and autobus2.discovery.BroadcastDiscoverer. Others might be added in
the future.
"""
# Number of times this bus has been __enter__'d. Allows it to be used
# as a re-entrant context manager.
self.context_enters = 0
if port is None:
port = 0
# True once close() has been called
self.closed = False
# The TCP server that will listen for connections
self.server = Socket()
self.server.bind(("", port))
# TODO: make the backlog configurable
self.server.listen(100)
self.port = self.server.getsockname()[1]
# Lock that nearly everything bus-related locks on
self.lock = RLock()
# PropertyTable whose keys are service ids and whose values are
# instances of autobus2.local.LocalService
self.local_services = PropertyTable()
self.local_services.global_watch(self.local_service_changed)
# Map of ids of discovered services to DiscoveredService instances
self.discovered_services = {}
self.discovery_listeners = []
# List of (filter, function) tuples, where filter is an info object
# filter and function is a function to be notified when a matching
# service is created or deleted
self.service_listeners = []
# Set of RemoteConnection instances that have been bound to a service
self.bound_connections = set()
# Set of discoverers registered on this bus
self.discoverers = set()
# Set of publishers registered on this bus
self.publishers = set()
if default_discoverers:
self.install_discoverer(discovery.BroadcastDiscoverer())
if default_publishers:
self.install_publisher(discovery.BroadcastPublisher())
Thread(name="autobus2.Bus.accept_loop", target=self.accept_loop).start()
# Disable the introspection service for now. I'm seeing what would
# happen if I have per-service introspection functions and objects, so
# I'm disabling the bus-wide introspection service.
# self._create_introspection_service()
#
# Register the bus as a service on itself.
self.create_service({"type": "autobus.details", "pid": os.getpid()}, _IntrospectionService(self))
def accept_loop(self):
"""
Called on a new thread to accept socket connections to this bus.
"""
self.server.settimeout(1)
while not self.closed:
try:
socket = None
socket = self.server.accept()[0]
self.setup_inbound_socket(socket)
except SocketTimeout: # This happens when we time out, which is
# normal. The 1-second timeout is to fix what appears to be a
# bug with Windows not properly throwing an exception from
# accept when another thread closes the socket.
pass
except: # This happens when the server socket is closed
if socket:
socket.close() # Make sure it's /really/ closed on the
# off chance that something else caused the exception
if not issubclass(sys.exc_type, SocketError): # Something else
# happened
print_exc()
# print "Bus server died"
return
@synchronized_on("lock")
def create_service(self, info, provider):
"""
Creates a new service on this bus. info is the info object to use for
this service. provider is the instance of
autobus2.service.ServiceProvider to publish; an instance of
autobus2.providers.PyServiceProvider can be used to publish a simple
Python object as a service. (This is how I expect most services to be
published; writing a custom ServiceProvider subclass should rarely be
needed.)
The return value is an instance of local.LocalService. You can safely
ignore it if you don't need it and don't plan on deleting the service
before you close the bus itself.
"""
# Create a new id for the service
service_id = messaging.create_service_id()
self.set_remote_info_builtins(service_id, info)
# Create the actual service object
service = local.LocalService(self, service_id, info, provider)
# Then store the service in our services map, which will cause the
# service to be published through the introspection service and through
# the bus's publishers (see self.local_service_changed).
self.local_services[service_id] = service
return service
def _close_service(self, service):
# This is called from LocalService.close, which will take care of
# shutting down the service's connections and such. So the only thing
# we really need to do here is delete the service from the local_service
# map, which will cause self.local_service_changed to unpublish the
# service and remove it from the introspection service.
del self.local_services[service.id]
@synchronized_on("lock")
def setup_inbound_socket(self, socket):
# Create a connection and then add it to our list of connections
connection = local.RemoteConnection(self, socket)
self.bound_connections.add(connection)
def connect(self, host, port, service_id, timeout=10, open_listener=None,
close_listener=None, fail_listener=None, lock=None):
"""
Opens a connection to the specified service on the specified host/port.
The connection will be returned immediately. The actual connection to
the server will be made as soon as possible in the future. If you need
to block until the connection actually connects, call wait_for_connect
on the returned Connection object.
The connection will attempt to reconnect indefinitely whenever it is
disconnected. If you don't want this behavior, specify a close_listener
that calls the connection's close method.
Timeout is the TCP timeout to use when connecting. The default is 10;
this is usually a suitable default. You'll probably only want to
increase this if you're working on a particularly latent network.
open_listener and close_listener are functions accepting one argument.
They will be called when the connection successfully connects and when
the connection disconnects, respectively, and the connection itself
will be passed in. They are both run synchronously on the connection's
input thread, so it's guaranteed that, for example, the connection will
not attempt to reconnect until close_listener has returned. Thus
close_listener could be set to a function that just closes the
specified connection in order to effectively disable the auto-reconnect
feature of connections.
"""
return remote.Connection(self, host, port, service_id, timeout, open_listener, close_listener, fail_listener, lock)
def connect_to(self, info_filter, timeout=10, open_listener=None, close_listener=None, fail_listener=None, lock=None):
"""
Locates the first service in the list of discovered services and uses
self.connect to connect to it. The connection is then returned.
This function will be going away soon. Service proxies (which can be
obtained using self.get_service_proxy) are the replacement; a single
service proxy is quite similar to this method, but it can follow the
service across restarts of the underlying process publishing the
service, which this method can't.
"""
with self.lock:
for service_id, d in self.discovered_services.items():
if filter_matches(d.info, info_filter):
host, port = d.locations.keys()[0]
return self.connect(host, port, service_id, timeout, open_listener, close_listener, fail_listener, lock)
raise exceptions.NoMatchingServiceException()
def get_service_proxy(self, info_filter, bind_function=None, unbind_function=None, multiple=False):
"""
Returns a service proxy that will connect to services matching the
specified info object filter. If multiple is False (the default), a
single service proxy will be returned. If multiple is True, a multiple
service proxy will be returned. See proxy.SingleServiceProxy and
proxy.MultipleServiceProxy for the differences between the two.
bind_function and unbind_function are optional functions that will be
called when the proxy binds to and unbinds from a service,
respectively. Binding is where a proxy discovers a new service matching
its info filter and establishes a connection to it. Unbinding is where
the proxy disconnects from said connection, usually because the service
went away.
"""
with self.lock:
if multiple:
return proxy.MultipleServiceProxy(self, info_filter, bind_function, unbind_function)
else:
return proxy.SingleServiceProxy(self, info_filter)
@synchronized_on("lock")
def close(self):
"""
Closes this bus and all services registered on it.
"""
if self.closed: # Already closed
return
self.closed = True
# First we shut down all of our discoverers
for discoverer in self.discoverers:
discoverer.shutdown()
# Then we need to close all of our services. Closing a service causes
# self._close_service to be called, which removes the service from the
# list of services, which causes self.local_service_changed to be
# called, which unpublishes the service. So we don't need to worry
# about unpublishing services aside from this.
for service_id in list(self.local_services):
self.local_services[service_id].close()
# Then we shut down all of the publishers
for publisher in self.publishers:
publisher.shutdown()
# Then we shut down the server socket
net.shutdown(self.server)
# Then we close all of the connections currently connected to us
for c in self.bound_connections:
with no_exceptions:
c.close()
# And that's it!
@synchronized_on("lock")
def install_publisher(self, publisher):
# Add the publisher to our list and start it up
self.publishers.add(publisher)
publisher.startup(self)
# Then register all of our local services with the publisher
for service in self.local_services.values():
publisher.add(service)
@synchronized_on("lock")
def remove_publisher(self, publisher):
# Check to make sure that the publisher is already installed
if publisher not in self.publishers:
# TODO: Not sure why we're using __builtin__ here...
raise __builtin__.ValueError("The specified publisher is not currently installed on this bus.")
# Remove the publisher from our list of publishers
self.publishers.remove(publisher)
# Unpublish all of our services from the publisher
for service in self.local_services.values():
if service.active:
publisher.remove(service)
# Then we shut down the publisher
publisher.shutdown()
@synchronized_on("lock")
def install_discoverer(self, discoverer):
# Add the discoverer to our list of discoverers, then start it up
self.discoverers.add(discoverer)
discoverer.startup(self)
@synchronized_on("lock")
def remove_discoverer(self, discoverer):
# Check to make sure that the discoverer has already been installed
if discoverer not in self.discoverers:
# TODO: Ditto from remove_publisher
raise __builtin__.ValueError("The specified discoverer is not currently installed on this bus.")
# Remove the discoverer from our list of discoverers, then shut it
# down
self.discoverers.remove(discoverer)
discoverer.shutdown()
def set_local_info_builtins(self, host, port, service_id, info):
new_info = info.copy()
new_info["host"] = host
new_info["port"] = port
new_info["service"] = service_id
return new_info
def set_remote_info_builtins(self, service_id, info):
"""
Adds some values to the specified info object. The only one added right
now is hostname, which is the value of socket.gethostname(). I haven't
really standardized the list of values added here; I hope to at some
point, though, and have all Autobus client libraries add the same ones.
"""
info["hostname"] = gethostname()
@synchronized_on("lock")
def discover(self, discoverer, host, port, service_id, info):
# print "Discovered:", (host, port, service_id, info)
# Add the relevant local builtins
info = self.set_local_info_builtins(host, port, service_id, info)
# Check to see if the specified service has been discovered yet, and if
# it hasn't, create an entry for it
is_new_service = False
if service_id not in self.discovered_services:
self.discovered_services[service_id] = DiscoveredService(info)
is_new_service = True
discovered_service = self.discovered_services[service_id]
# Check to see if the specified host/port combination is already
# present, and if it isn't, add it.
if (host, port) not in discovered_service.locations:
discovered_service.locations[(host, port)] = []
discoverer_list = discovered_service.locations[(host, port)]
# Check to see if this discoverer has already discovered that host/port
if discoverer in discoverer_list:
print ("Warning: discoverer " + str(discoverer) +
" tried to rediscover " + str((host, port, service_id)) +
" with info " + str(info))
return
# It hasn't, so add it.
discoverer_list.append(discoverer)
# The check to see if we need to notify listeners, and do so if we
# need to
if is_new_service:
self.notify_service_listeners(service_id, host, port, info, DISCOVERED)
@synchronized_on("lock")
def undiscover(self, discoverer, host, port, service_id):
# print "Undiscovered:", (host, port, service_id)
# Check to see if the specified service has been discovered.
if service_id not in self.discovered_services:
print ("Warning: discoverer " + str(discoverer) + " tried to "
"undiscover " + str((host, port, service_id)) + " when "
"such a service does not exist.")
return
discovered_service = self.discovered_services[service_id]
if (host, port) not in discovered_service.locations:
print ("Warning: discoverer " + str(discoverer) + " tried to "
"undiscover " + str((host, port, service_id)) + " when "
"that host/port has not yet been discovered.")
return
discoverer_list = discovered_service.locations[(host, port)]
if discoverer not in discoverer_list:
print ("Warning: discoverer " + str(discoverer) + " tried to "
"undiscover " + str((host, port, service_id)) + " when "
"this discoverer hasn't discovered that host/port yet.")
return
discoverer_list.remove(discoverer)
if not discoverer_list:
if discovered_service.locations.keys()[0] == (host, port): # We're
# removing the first (and therefore default) location, so if
# there's another location, we need to let the service
# listeners know that there's a new default location
if len(discovered_service.locations) > 1: # There will be
# another location even after we delete this one
new_host, new_port = discovered_service.locations.keys()[1]
if not self.closed: # Don't issue changes if we're shutting down
self.notify_service_listeners(service_id, new_host, new_port, discovered_service.info, CHANGED)
del discovered_service.locations[(host, port)]
if not discovered_service.locations: # That was the last location
# available for this service, so we delete the service itself,
# and notify listeners that it was deleted
del self.discovered_services[service_id]
self.notify_service_listeners(service_id, host, port, discovered_service.info, UNDISCOVERED)
@synchronized_on("lock")
def add_service_listener(self, listener, info_filter=None, initial=False):
"""
Listens for changes in services that are available. listener is a
function listener(service_id, host, port, info, event) which will be
called whenever a service becomes available, a service disappears, or
the host/port that should be used to access a particular service
changes. service_id is the id of the service; host/port is the host/port
at which the service can be found, info is the service's info object,
and event is one of DISCOVERED, UNDISCOVERED, or CHANGED.
If info_filter is a dictionary, only services with info objects matching
that particular filter (as per the filter_matches function) will cause
the listener to be called. If info_filter is None (the default), or the
empty dictionary (since all info objects match the empty dictionary),
the listener will be called for all services.
If initial is True, the listener will be immediately (and synchronously)
called once for each service that already exists, passing in DISCOVERED
as the event. Otherwise, the listener will only be called once the next
"""
# Add the listener to our list of listeners
self.service_listeners.append((info_filter, listener))
# Check to see if we're supposed to notify the listener about all
# matching services that already exist
if initial:
# Scan all of the services
for service_id, discovered_service in self.discovered_services.items():
if filter_matches(discovered_service.info, info_filter):
# If this service matches, notify the listener about it
host, port = discovered_service.locations.keys()[0]
with print_exceptions:
listener(service_id, host, port, discovered_service.info, DISCOVERED)
@synchronized_on("lock")
def remove_service_listener(self, listener, initial=False):
# Scan the list of listeners and remove this one. Inefficient, it's
# true, and I hope to make it more efficient later on.
for index, (info_filter, l) in enumerate(self.service_listeners[:]):
# See if we've hit the right listener
if l == listener:
# If we have, remove the listener
del self.service_listeners[index]
if initial:
# Scan through the list of services
for service_id, discovered_service in self.discovered_services.items():
if filter_matches(discovered_service.info, info_filter):
# This service matched, so we notify this
# listener that the service was removed
with print_exceptions:
listener(service_id, None, None, None, UNDISCOVERED)
# We've found our listener and deleted it, so we return now
return
def notify_service_listeners(self, service_id, host, port, info, event):
for filter, listener in self.service_listeners:
if filter_matches(info, filter):
with print_exceptions:
listener(service_id, host, port, info, event)
def local_service_changed(self, service_id, old, new):
"""
Called (by the local_services property table) when services come and go.
All we really need to do is publish/unpublish the service.
"""
if old:
for publisher in self.publishers:
publisher.remove(old)
if new:
for publisher in self.publishers:
publisher.add(new)
def tcp_connect_handler(sock: socket.socket, remote: list,
server: socketserver.TCPServer):
global dns_cache
now = time.strftime("%Y-%m-%d %H:%M:%S")
remote_addr = remote[0]
if resolve_dns:
if remote_addr not in dns_cache:
remote_addr_info = []
try:
remote_addr_info = socket.gethostbyaddr(remote_addr)
except socket.herror:
pass
except:
msg = "\n%s\n%s\n" % (sys.exc_info()[0], sys.exc_info()[1])
print(msg)
if len(remote_addr_info) >= 1:
remote_addr = remote_addr_info[0]
dns_cache[remote[0]] = remote_addr
else:
remote_addr = dns_cache[remote_addr]
print("[%s] Incoming connection on %s:%s from %s:%s" %
(now, sock.getsockname()[0], sock.getsockname()[1], remote_addr,
remote[1]))
if fp_tcp_listen:
fp_tcp_listen.write("%s,%s:%s,%s:%s\n" %
(now, sock.getsockname()[0], sock.getsockname()[1],
remote_addr, remote[1]))
fp_tcp_listen.flush()
sock.close()
def _recv_message(sock: socket) -> bytes:
from time import sleep
_recv_message.recv_locks[sock].acquire()
_logger.debug(str(sock.getsockname()) + " waiting for recv message length")
try:
tries = 0
while tries < MAX_RETRY:
content_length_message = sock.recv(CONTENT_LENGTH_MESSAGE_LENGTH).decode().strip()
_logger.debug(str(sock.getsockname()) + " got message length message: " + content_length_message)
if content_length_message:
content_length = int(content_length_message)
_logger.debug(
str(sock.getsockname()) + " waits for receiving a message of length " + str(content_length))
break
else:
tries = tries + 1
sleep(1)
else:
_logger.warning("Did not receive content length message.")
return b""
except ConnectionResetError:
_logger.info("The socket " + str(sock.getsockname()) + " was closed.")
content_length = 0
except Exception as ex:
_logger.warning("The socket stream of " + str(sock.getsockname())
+ " got corrupted. It is likely that any further message will also break. Cause: " + str(ex))
content_length = 0
received_message = b""
while len(received_message) < content_length:
received_message = received_message + sock.recv(content_length - len(received_message))
_recv_message.recv_locks[sock].release()
return received_message
def transfer(src: socket.socket, dst: socket.socket, send: bool) -> None:
"""
Send data received on the source socket to the destination socket.
"""
src_addr, src_port = src.getsockname()
dst_addr, dst_port = dst.getsockname()
while True:
try:
buffer = src.recv(0x400)
except socket.error:
break
if len(buffer) == 0:
logging.debug("[-] No data received! Breaking...")
break
try:
dst.send(buffer)
except socket.error:
break
logging.debug(f"[+] Closing connections! [{src_addr}:{src_port}]")
try:
src.shutdown(socket.SHUT_RDWR)
src.close()
except socket.error:
pass
logging.debug(f"[+] Closing connections! [{dst_addr}:{dst_port}]")
try:
dst.shutdown(socket.SHUT_RDWR)
dst.close()
except socket.error:
pass
def receiver(self, login: str, client_sock: socket.socket):
while self.running:
try:
data = client_sock.recv(1024)
except ConnectionResetError:
break
if data == b'stop':
print('Client {} stopped'.format(login))
self.connected.remove(client_sock)
self.players.remove(login)
try:
client_sock.sendall(b'')
except ConnectionResetError:
pass
break
decoded = data.decode()
login, command = list(
csv.reader(io.StringIO(decoded), delimiter=' ',
quotechar='"'))[0]
if command == 'create':
self.players.append(login)
print('Client {} {} sent: "{}"'.format(login,
client_sock.getsockname(),
decoded))
self.received_data.write_end(data)
time.sleep(0.01)
print('Stopped receiving from {} {}'.format(login,
client_sock.getsockname()))
client_sock.close()
def send_message(receiver: socket, sender: socket , data:str) -> None:
"""Send the message as string to the destination"""
prev = {
"TO": receiver.getsockname(),
"FROM": sender.getsockname(),
"WTF": WTF.SEND_TEXT
}
def __init__(self, runner: 'BaseRunner', sock: socket.socket, *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128) -> None:
super().__init__(runner, shutdown_timeout=shutdown_timeout,
ssl_context=ssl_context, backlog=backlog)
self._sock = sock
scheme = 'https' if self._ssl_context else 'http'
if hasattr(socket, 'AF_UNIX') and sock.family == socket.AF_UNIX:
name = '{}://unix:{}:'.format(scheme, sock.getsockname())
else:
host, port = sock.getsockname()[:2]
name = str(URL.build(scheme=scheme, host=host, port=port))
self._name = name
def __init__(self, runner: 'BaseRunner', sock: socket.socket, *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128) -> None:
super().__init__(runner, shutdown_timeout=shutdown_timeout,
ssl_context=ssl_context, backlog=backlog)
self._sock = sock
scheme = 'https' if self._ssl_context else 'http'
if hasattr(socket, 'AF_UNIX') and sock.family == socket.AF_UNIX:
name = '{}://unix:{}:'.format(scheme, sock.getsockname())
else:
host, port = sock.getsockname()[:2]
name = str(URL.build(scheme=scheme, host=host, port=port))
self._name = name
def __listen_to_client(self, client: socket.socket, address: tuple) -> None:
print("{}Creating new thread for client {}:{}".format(self.__tag, *address), flush=True)
_client = Client(client, client.getsockname())
while True:
try:
data, _ = receive(client, buffer_size=2048)
print("{}Received {} from {}:{}".format(self.__tag, data, *address), flush=True)
if isinstance(data, dict):
data = Dict(data)
data.data.update({'timestamp': datetime.now()})
dir_name = data.source
if self.dir_name:
dir_name = join_path(self.dir_name, data.source.split("_")[0])
save_csv(data.data, data.source, dir_name=dir_name)
send_to(client, f"OK - {datetime.now()}")
except:
# traceback.print_exc()
addr, port = _client.address
print(f"\t[ {fg(255, 0, 0)}- {fg.rs}] Unregistered {addr}:{port}", flush=True)
self.mutex.acquire()
self.__instances.remove(client)
self.mutex.release()
exit(1)
def original_addr(csock: socket.socket) -> typing.Tuple[str, int]:
# Get the original destination on Linux.
# In theory, this can be done using the following syscalls:
# sock.getsockopt(socket.SOL_IP, SO_ORIGINAL_DST, 16)
# sock.getsockopt(SOL_IPV6, SO_ORIGINAL_DST, 28)
#
# In practice, it is a bit more complex:
# 1. We cannot rely on sock.family to decide which syscall to use because of IPv4-mapped
# IPv6 addresses. If sock.family is AF_INET6 while sock.getsockname() is ::ffff:127.0.0.1,
# we need to call the IPv4 version to get a result.
# 2. We can't just try the IPv4 syscall and then do IPv6 if that doesn't work,
# because doing the wrong syscall can apparently crash the whole Python runtime.
# As such, we use a heuristic to check which syscall to do.
is_ipv4 = "." in csock.getsockname()[0] # either 127.0.0.1 or ::ffff:127.0.0.1
if is_ipv4:
# the struct returned here should only have 8 bytes, but invoking sock.getsockopt
# with buflen=8 doesn't work.
dst = csock.getsockopt(socket.SOL_IP, SO_ORIGINAL_DST, 16)
port, raw_ip = struct.unpack_from("!2xH4s", dst)
ip = socket.inet_ntop(socket.AF_INET, raw_ip)
else:
dst = csock.getsockopt(SOL_IPV6, SO_ORIGINAL_DST, 28)
port, raw_ip = struct.unpack_from("!2xH4x16s", dst)
ip = socket.inet_ntop(socket.AF_INET6, raw_ip)
return ip, port
def _handle(me, s: socket.socket):
while me.alive:
me.server.alive = me.alive
try:
data = s.recv(1024)
except:
# Perhaps the user disconnected.
pass
if data:
# This could be an `ask` or a `register` request.
try:
remote_user = User.from_bytes(data)
assert(type(remote_user) == User)
me.register(remote_user)
print('New user registered:', remote_user)
print('Now there are', len(me.users), 'registered users.\n')
except:
regex = data.decode('utf-8')
print(s.getsockname(), 'is asking for', regex)
r = re.compile(regex)
matches = [me.users[u] for u in me.users
if r.match(me.users[u].name)]
for u in matches:
try:
bytes = pickle.dumps(u)
s.sendall(bytes)
except:
# Perhaps the user disconnected?
continue
continue
def match_socket(self,
sock: socket.socket,
address: IPv6Address,
interface: int = 0) -> bool:
"""
Determine if we can recycle this socket
:param sock: An existing socket
:param address: The address we want
:param interface: The interface number we want
:return: Whether the socket is suitable
"""
if sock.family != socket.AF_INET6 or sock.type != self.sock_type or sock.proto != self.sock_proto:
# Different protocol
return False
sockname = sock.getsockname()
if IPv6Address(sockname[0].split('%')[0]) != address \
or sockname[1] != self.listen_port \
or sockname[3] != interface:
# Wrong address
return False
# Amazing! This one seems to match
return True
def send_user_files(self, user_name: str, connection: socket.socket):
thread_name = current_thread().name
print('\t\t{}: Checking files for {}'.format(thread_name,
connection.getsockname()))
user_dir = self.get_user_dir(user_name)
for root, dirs, files in os.walk(user_dir):
if not files:
print('\t\t{}: No files to send.'.format(thread_name))
connection.sendall(
json.dumps({
'message': communication.RESULTS[6]
}).encode())
else:
print('\t\t{}: Sending files.'.format(thread_name))
for file_name in files:
# Envia o nome do arquivo
print('\t\t{}: Sending file name.'.format(thread_name))
connection.sendall(
json.dumps({
'file_name': file_name
}).encode())
# Envia os dados do arquivo
with open(os.path.join(user_dir, file_name), 'rb') as file:
print('\t\t{}: Sending file data.'.format(thread_name))
file_data = file.read(communication.BUFFSIZE)
while file_data:
connection.sendall(file_data)
file_data = file.read(communication.BUFFSIZE)
def bind_unused_port(sock: socket.socket, host: str = 'localhost') -> int:
"""Bind the socket to a free port and return the port number.
This code is based on the code in the stdlib's test.test_support module."""
if sock.family in (socket.AF_INET,
socket.AF_INET6) and sock.type == socket.SOCK_STREAM:
if hasattr(socket, "SO_EXCLUSIVEADDRUSE"):
try:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE,
1)
except socket.error:
pass
if sock.family == socket.AF_INET:
if host == 'localhost':
sock.bind(('127.0.0.1', 0))
else:
sock.bind((host, 0))
elif sock.family == socket.AF_INET6:
if host == 'localhost':
sock.bind(('::1', 0, 0, 0))
else:
sock.bind((host, 0, 0, 0))
else:
raise CommunicationError("unsupported socket family: " +
str(sock.family))
return sock.getsockname()[1]
def process_requests(waiting_socket: socket, handle_message: Callable[[bytes, List[bytes]], bytes]) -> None:
# FIXME How to recover failures?
try:
while True:
process_request(waiting_socket, handle_message)
except (ConnectionAbortedError, ConnectionResetError):
_logger.info("The socket " + str(waiting_socket.getsockname()) + " was closed.")
def forward_tcp_to_tcp(source: socket.socket, destination: socket.socket):
try:
log.debug("Ongoing connection route: %s ---> %s ---> %s" %
(source.getpeername(), source.getsockname(),
destination.getpeername()))
except:
# Do nothing
log.debug("Socket closed maybe??")
message = ' '
while message:
message = source.recv(tcp_bufsize)
if message:
destination.sendall(message)
else:
try:
source.shutdown(socket.SHUT_RD)
except:
# traceback.print_exc()
pass # Do nothing then
try:
destination.shutdown(socket.SHUT_WR)
except:
# traceback.print_exc()
pass # Do nothing then
break
def _recv(self, sock: socket.socket, mask):
local_addr = sock.getsockname()
data, addr = sock.recvfrom(65535) # maximum udp packet size
session = self._session.get_session((local_addr, addr))
session: _SessionPeer
# check if the session exist
if session is None:
_logger.info("new session from [%s]:%d" % (addr[0], addr[1]))
# session not exist, we should create a new relay session
destination_addrinfo = self._sock_to_destination[sock]
relay_sock = socket.socket(destination_addrinfo[0], socket.SOCK_DGRAM)
# send data to the destination at first,
# so the system will automatically bind a address for that socket
relay_sock.sendto(data, destination_addrinfo[4])
relay_local_addr = relay_sock.getsockname()
session = self._session.create_session((local_addr, addr), sock,
(relay_local_addr, destination_addrinfo[4]), relay_sock)
self.__selector.register(relay_sock, selectors.EVENT_READ, self._recv)
_logger.info("udp session created: [%s]:%d,[%s]:%d <> [%s]:%d,[%s]:%d" %
(MultiThreadUDPRelay._format_addr(addr) +
MultiThreadUDPRelay._format_addr(local_addr) +
MultiThreadUDPRelay._format_addr(relay_local_addr) +
MultiThreadUDPRelay._format_addr(destination_addrinfo[4])))
else:
session.socket.sendto(data, session.address)
session.session_info.update(len(data))
def log_startup(sock: socket.socket) -> None:
all_addresses_message = (
" * Running on all addresses.\n"
" WARNING: This is a development server. Do not use it in"
" a production deployment.")
if sock.family == af_unix:
_log("info", " * Running on %s (Press CTRL+C to quit)", hostname)
else:
if hostname == "0.0.0.0":
_log("warning", all_addresses_message)
display_hostname = get_interface_ip(socket.AF_INET)
elif hostname == "::":
_log("warning", all_addresses_message)
display_hostname = get_interface_ip(socket.AF_INET6)
else:
display_hostname = hostname
if ":" in display_hostname:
display_hostname = f"[{display_hostname}]"
_log(
"info",
" * Running on %s://%s:%d/ (Press CTRL+C to quit)",
"http" if ssl_context is None else "https",
display_hostname,
sock.getsockname()[1],
)
def bind_unused_port(
sock: socket.socket,
host: Union[str, ipaddress.IPv4Address,
ipaddress.IPv6Address] = 'localhost'
) -> int:
"""Bind the socket to a free port and return the port number.
This code is based on the code in the stdlib's test.test_support module."""
if sock.family in (socket.AF_INET,
socket.AF_INET6) and sock.type == socket.SOCK_STREAM:
if hasattr(socket, "SO_EXCLUSIVEADDRUSE"):
with contextlib.suppress(socket.error):
sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE,
1)
if not isinstance(host, str):
host = str(host)
if sock.family == socket.AF_INET:
if host == 'localhost':
sock.bind(('127.0.0.1', 0))
else:
sock.bind((host, 0))
elif sock.family == socket.AF_INET6:
if host == 'localhost':
sock.bind(('::1', 0, 0, 0))
else:
sock.bind((host, 0, 0, 0))
else:
raise CommunicationError("unsupported socket family: " +
str(sock.family))
return sock.getsockname()[1]
def handle_conn(self, client_sock: socket.socket) -> None:
try:
client_address = client_sock.getsockname()
client = self.client_init(client_sock)
if client:
self.online[client.username] = client
th_send = threading.Thread(target=client._sending_thread)
th_recv = threading.Thread(target=client._receiving_thread)
th_send.start()
th_recv.start()
th_send.join()
th_recv.join()
if client.username in self.online:
del self.online[client.username]
except Exception as e:
traceback.print_exc()
logging.error(f'Error occured: {e}')
finally:
if client:
logging.info(f'{client_address} has been disconnected...')
if client.username in self.online:
del self.online[client.username]
client_sock.close()
def __init__(self, server: Server, client_socket: socket.socket):
"""
Instantiates a new ClientConnection
:param server: The parent server of the connection
:param client_socket: The socket of the client that is to be read
"""
super().__init__(name=str(client_socket.getsockname()))
self.timestamp = datetime.datetime.now()
self.server = server
self.address = client_socket.getsockname()
self.socket = client_socket
self.requestSize = None
self.reader = BufferedReader(client_socket, server.notify_period,
server.buffer_size)
def spam_clients(sock: socket.socket, other_clients: List[Tuple[str, int]]):
# Only other clients should arrive here
for client in other_clients:
for x in range(10):
# Spam them
msg = "{0} send to {2}, try={1}".format(sock.getsockname(), x,
client)
sock.sendto(msg.encode(), client)
def test_call_after_close_raises(receiver_socket: socket.socket,
caplog: Any) -> None:
host, port = receiver_socket.getsockname()
client = StatsdClient(host=host, port=port, max_buffer_size=0)
client._close()
with pytest.raises(RuntimeError):
client.increment("foo", 1)
def environ(self, server: socket.socket) -> Dict[bytes, bytes]:
path = os.fsencode(server.getsockname())
return collections.OrderedDict((
(b"NON_DNSMASQ_PREFIX_ENV", b"1"),
(b"DNSMASQ_PREFIX_ENV", b"2"),
(b"DNSMASQ_PREFIX_WITH_WHITESPACE", b" \twith\t whitespace\t "),
(b"DNSMASQ_CHARACTERS", bytes(range(0x01, 0x100))),
(b"HADES_AUTH_DHCP_SCRIPT_SOCKET", path),
))
def __init__(self, conn: socket.socket, other_users, games):
threading.Thread.__init__(self)
self.conn = conn
self.ip_addr, self.port = conn.getsockname()
self.username = ""
self.other_users = other_users
self.dead = False
self.games = games
print("[+] New server socket thread started for " + self.ip_addr +
":" + str(self.port))
def create_router_ips(self, message: Message, client: socket):
print("Il SERVER sta generando gli indirizzi IP per %s:%s" %
client.getsockname())
content = message.text
self.prepare_for_next_message_to_client(message)
message.message_type = MessageType.DHCP_ROUTER_ACK
publicnetwork = self.generate_client_ip(content, client)
message.text = "ServerIP:" + self.generate_server_ip(
publicnetwork) + "\nClienIP:" + publicnetwork
return message
def _send_msg(self, sock: socket.socket, msg: Any,
addr: Tuple[str, int]) -> None:
# @TODO Sent information should be different based on message received
template = 'Send message to {0}:{1} using interface {2}:{3}.'
if (isinstance(msg, str)):
sock.sendto(msg.encode(self._encoding), addr)
else:
sock.sendto(msg, addr)
self._logger.info(
template.format(addr[0], addr[1], *sock.getsockname()))
def test_no_buffering_sends_immediately(
receiver_socket: socket.socket) -> None:
host, port = receiver_socket.getsockname()
client = StatsdClient(host=host, port=port, max_buffer_size=0)
client.increment("foo", 1)
assert _read_from_socket(receiver_socket) == "foo:1|c"
assert _read_from_socket(receiver_socket) == ""
client.increment("foo", 2)
assert _read_from_socket(receiver_socket) == "foo:2|c"
def test_broken_pipe(receiver_socket: socket.socket, caplog: Any) -> None:
host, port = receiver_socket.getsockname()
client = StatsdClient(host=host, port=port, max_buffer_size=0)
with mock.patch("socket.socket.send",
side_effect=[2]), caplog.at_level(logging.WARNING):
# Should not raise.
client.increment("foo", 1)
assert len(caplog.records) == 1
assert "Broken pipe" in caplog.text
def __init__(self):
# Set up the interrupt socket
interrupt_server = Socket()
interrupt_server.bind(("localhost", 0))
interrupt_server.listen(1)
self.interrupt_writer = Socket()
self.interrupt_writer.setblocking(False)
self.interrupt_writer.connect("localhost", interrupt_server.getsockname()[1])
self.interrupt_reader = interrupt_server.accept()
interrupt_server.shutdown(SHUT_RDWR)
interrupt_server.close()
self.interrupt_reader.setblocking(False)
self.interrupt_writer.setblocking(False)
def test_socket_errors_are_logged_not_raised(receiver_socket: socket.socket,
caplog: Any) -> None:
host, port = receiver_socket.getsockname()
client = StatsdClient(host=host, port=port, max_buffer_size=0)
with mock.patch("socket.socket.send",
side_effect=[socket.error("Broken socket")
]), caplog.at_level(logging.WARNING):
# Should not raise.
client.increment("foo", 1)
assert len(caplog.records) == 1
assert "Error sending packet" in caplog.text
def _read(self, sock: socket.socket):
# socket may not exist in relay table
if sock not in self.__relay_table:
return
_logger.debug("read from sock ('%s':%d)" % _format_addr(sock.getsockname()))
buffer = self.__send_buffer[self._peer(sock)]
if buffer['buffer'] is None:
try:
buffer['buffer'] = sock.recv(81920)
_logger.debug("actually read, length: %d" % len(buffer['buffer']))
except ConnectionAbortedError:
_logger.info("connection abort while receiving from '%s':%d" % _format_addr(sock.getsockname()))
buffer['buffer'] = None
except ConnectionResetError:
_logger.info("connection reset from '%s':%d" % _format_addr(sock.getsockname()))
buffer['buffer'] = None
if not buffer['buffer']:
_logger.debug("connection closed.")
buffer['buffer'] = None
if buffer['buffer'] is None:
self._clear(sock)
return
buffer['send_pos'] = 0
try:
buffer['send_pos'] += self._peer(sock).send(buffer['buffer'][buffer['send_pos']:])
except (ConnectionAbortedError, ConnectionResetError):
_logger.info("connection abort while sending to '%s':%d" %
_format_addr(self.__relay_table[sock].getpeername()))
self._clear(sock)
return
except BlockingIOError: # send buffer is full
buffer['send_pos'] = 0 # so the next time we write data to buffer from position 0
if buffer['send_pos'] == len(buffer['buffer']): # no more data in buffer
buffer['buffer'] = None
else:
# handle writable event on socket, so we can write to the socket as fast as possible
self.__selector.modify(self._peer(sock), selectors.EVENT_WRITE | selectors.EVENT_READ, self._relay_handle)
self.__send_buffer[self._peer(sock)] = buffer
def test_unexpected_exceptions_are_logged_not_raised(
receiver_socket: socket.socket, caplog: Any) -> None:
host, port = receiver_socket.getsockname()
client = StatsdClient(host=host, port=port, max_buffer_size=0)
with mock.patch("socket.socket.send",
side_effect=[ValueError("Random error")
]), caplog.at_level(logging.ERROR):
# Should not raise.
client.increment("foo", 1)
assert len(caplog.records) == 1
assert "Traceback (most recent call last)" in caplog.text
assert "ValueError: Random error" in caplog.text
def match_socket(self, sock: socket.socket, address: IPv6Address, interface: int = 0) -> bool:
"""
Determine if we can recycle this socket
:param sock: An existing socket
:param address: The address we want
:param interface: The interface number we want
:return: Whether the socket is suitable
"""
if sock.family != socket.AF_INET6 or sock.type != self.sock_type or sock.proto != self.sock_proto:
# Different protocol
return False
sockname = sock.getsockname()
if IPv6Address(sockname[0].split('%')[0]) != address \
or sockname[1] != self.listen_port \
or sockname[3] != interface:
# Wrong address
return False
# Amazing! This one seems to match
return True
def tcp_connect_handler(sock:socket.socket, remote:list, server:socketserver.TCPServer):
now = time.strftime("%Y-%m-%d %H:%M:%S")
print("[%s] Incoming connection on %s:%s from %s:%s" % (now,sock.getsockname()[0],sock.getsockname()[1],remote[0],remote[1]))
#sock.shutdown(socket.SHUT_RDWR)
sock.close()
