def bind_sockets(port, address=None, family=socket.AF_UNSPEC, backlog=128, flags=None): """Creates listening sockets bound to the given port and address. Returns a list of socket objects (multiple sockets are returned if the given address maps to multiple IP addresses, which is most common for mixed IPv4 and IPv6 use). Address may be either an IP address or hostname. If it's a hostname, the server will listen on all IP addresses associated with the name. Address may be an empty string or None to listen on all available interfaces. Family may be set to either `socket.AF_INET` or `socket.AF_INET6` to restrict to IPv4 or IPv6 addresses, otherwise both will be used if available. The ``backlog`` argument has the same meaning as for `socket.listen() <socket.socket.listen>`. ``flags`` is a bitmask of AI_* flags to `~socket.getaddrinfo`, like ``socket.AI_PASSIVE | socket.AI_NUMERICHOST``. """ sockets = [] if address == "": address = None if not socket.has_ipv6 and family == socket.AF_UNSPEC: # Python can be compiled with --disable-ipv6, which causes # operations on AF_INET6 sockets to fail, but does not # automatically exclude those results from getaddrinfo # results. # http://bugs.python.org/issue16208 family = socket.AF_INET if flags is None: flags = socket.AI_PASSIVE for res in set(socket.getaddrinfo(address, port, family, socket.SOCK_STREAM, 0, flags)): af, socktype, proto, canonname, sockaddr = res try: sock = socket.socket(af, socktype, proto) except socket.error as e: if e.args[0] == errno.EAFNOSUPPORT: continue raise set_close_exec(sock.fileno()) if os.name != 'nt': sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) if af == socket.AF_INET6: # On linux, ipv6 sockets accept ipv4 too by default, # but this makes it impossible to bind to both # 0.0.0.0 in ipv4 and :: in ipv6. On other systems, # separate sockets *must* be used to listen for both ipv4 # and ipv6. For consistency, always disable ipv4 on our # ipv6 sockets and use a separate ipv4 socket when needed. # # Python 2.x on windows doesn't have IPPROTO_IPV6. if hasattr(socket, "IPPROTO_IPV6"): sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1) sock.setblocking(0) sock.bind(sockaddr) sock.listen(backlog) sockets.append(sock) return sockets
def bind_unix_socket(file, mode=0o600, backlog=128): """Creates a listening unix socket. If a socket with the given name already exists, it will be deleted. If any other file with that name exists, an exception will be raised. Returns a socket object (not a list of socket objects like `bind_sockets`) """ sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) set_close_exec(sock.fileno()) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) sock.setblocking(0) try: st = os.stat(file) except OSError as err: if err.errno != errno.ENOENT: raise else: if stat.S_ISSOCK(st.st_mode): os.remove(file) else: raise ValueError("File %s exists and is not a socket", file) sock.bind(file) os.chmod(file, mode) sock.listen(backlog) return sock
def setUp(self): super(ReactorReaderWriterTest, self).setUp() r, w = os.pipe() self._set_nonblocking(r) self._set_nonblocking(w) set_close_exec(r) set_close_exec(w) self._p1 = os.fdopen(r, "rb", 0) self._p2 = os.fdopen(w, "wb", 0)
def initialize(self, impl, time_func=None): super(PollIOLoop, self).initialize() self._impl = impl if hasattr(self._impl, 'fileno'): set_close_exec(self._impl.fileno()) self.time_func = time_func or time.time self._handlers = {} self._events = {} self._callbacks = [] self._callback_lock = threading.Lock() self._timeouts = [] self._cancellations = 0 self._running = False self._stopped = False self._closing = False self._thread_ident = None self._blocking_signal_threshold = None # Create a pipe that we send bogus data to when we want to wake # the I/O loop when it is idle self._waker = Waker() self.add_handler(self._waker.fileno(), lambda fd, events: self._waker.consume(), self.READ)
def _pipe_cloexec(): r, w = os.pipe() set_close_exec(r) set_close_exec(w) return r, w