def _acceptAddressTest(self, family, localhost):
"""
Create a C{SOCK_STREAM} connection to localhost using a socket with an
address family of C{family} and assert that the result of
L{iocpsupport.get_accept_addrs} is consistent with the result of
C{socket.getsockname} and C{socket.getpeername}.
"""
msg("family = %r" % (family, ))
port = socket(family, SOCK_STREAM)
self.addCleanup(port.close)
port.bind(('', 0))
port.listen(1)
client = socket(family, SOCK_STREAM)
self.addCleanup(client.close)
client.setblocking(False)
try:
client.connect((localhost, port.getsockname()[1]))
except error as e:
self.assertIn(e.errno, (errno.EINPROGRESS, errno.EWOULDBLOCK))
server = socket(family, SOCK_STREAM)
self.addCleanup(server.close)
buff = array('B', b'\0' * 256)
self.assertEqual(
0, _iocp.accept(port.fileno(), server.fileno(), buff, None))
server.setsockopt(SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
pack('P', port.fileno()))
self.assertEqual(
(family, client.getpeername()[:2], client.getsockname()[:2]),
_iocp.get_accept_addrs(server.fileno(), buff))
class SupportTests(unittest.TestCase):
"""
Tests for L{twisted.internet.iocpreactor.iocpsupport}, low-level reactor
implementation helpers.
"""
def _acceptAddressTest(self, family, localhost):
"""
Create a C{SOCK_STREAM} connection to localhost using a socket with an
address family of C{family} and assert that the result of
L{iocpsupport.get_accept_addrs} is consistent with the result of
C{socket.getsockname} and C{socket.getpeername}.
"""
msg("family = %r" % (family, ))
port = socket(family, SOCK_STREAM)
self.addCleanup(port.close)
port.bind(('', 0))
port.listen(1)
client = socket(family, SOCK_STREAM)
self.addCleanup(client.close)
client.setblocking(False)
try:
client.connect((localhost, port.getsockname()[1]))
except error, (errnum, message):
self.assertIn(errnum, (errno.EINPROGRESS, errno.EWOULDBLOCK))
server = socket(family, SOCK_STREAM)
self.addCleanup(server.close)
buff = array('c', '\0' * 256)
self.assertEqual(
0, _iocp.accept(port.fileno(), server.fileno(), buff, None))
server.setsockopt(SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
pack('P', server.fileno()))
self.assertEqual(
(family, client.getpeername()[:2], client.getsockname()[:2]),
_iocp.get_accept_addrs(server.fileno(), buff))
def _acceptAddressTest(self, family, localhost):
"""
Create a C{SOCK_STREAM} connection to localhost using a socket with an
address family of C{family} and assert that the result of
L{iocpsupport.get_accept_addrs} is consistent with the result of
C{socket.getsockname} and C{socket.getpeername}.
"""
msg("family = %r" % (family,))
port = socket(family, SOCK_STREAM)
self.addCleanup(port.close)
port.bind(('', 0))
port.listen(1)
client = socket(family, SOCK_STREAM)
self.addCleanup(client.close)
client.setblocking(False)
try:
client.connect((localhost, port.getsockname()[1]))
except error as e:
self.assertIn(e.errno, (errno.EINPROGRESS, errno.EWOULDBLOCK))
server = socket(family, SOCK_STREAM)
self.addCleanup(server.close)
buff = array('B', b'\0' * 256)
self.assertEqual(
0, _iocp.accept(port.fileno(), server.fileno(), buff, None))
server.setsockopt(
SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, pack('P', port.fileno()))
self.assertEqual(
(family, client.getpeername()[:2], client.getsockname()[:2]),
_iocp.get_accept_addrs(server.fileno(), buff))
def doAccept(self):
evt = _iocp.Event(self.cbAccept, self)
# see AcceptEx documentation
evt.buff = buff = _iocp.AllocateReadBuffer(2 * (self.addrLen + 16))
evt.newskt = newskt = self.reactor.createSocket(self.addressFamily, self.socketType)
rc = _iocp.accept(self.socket.fileno(), newskt.fileno(), buff, evt)
if rc and rc != ERROR_IO_PENDING:
self.handleAccept(rc, evt)
def doAccept(self):
evt = _iocp.Event(self.cbAccept, self)
# see AcceptEx documentation
evt.buff = buff = bytearray(2 * (self.addrLen + 16))
evt.newskt = newskt = self.reactor.createSocket(
self.addressFamily, self.socketType)
rc = _iocp.accept(self.socket.fileno(), newskt.fileno(), buff, evt)
if rc and rc != ERROR_IO_PENDING:
self.handleAccept(rc, evt)
def doAccept(self):
numAccepts = 0
while 1:
evt = _iocp.Event(self.cbAccept, self)
# see AcceptEx documentation
evt.buff = buff = _iocp.AllocateReadBuffer(2 * (self.addrLen + 16))
evt.newskt = newskt = self.reactor.createSocket(self.addressFamily,
self.socketType)
rc = _iocp.accept(self.socket.fileno(), newskt.fileno(), buff, evt)
if (rc == ERROR_IO_PENDING
or (not rc and numAccepts >= self.maxAccepts)):
break
else:
evt.ignore = True
if not self.handleAccept(rc, evt):
break
numAccepts += 1
def doAccept(self):
numAccepts = 0
while 1:
evt = _iocp.Event(self.cbAccept, self)
# see AcceptEx documentation
evt.buff = buff = _iocp.AllocateReadBuffer(2 * (self.addrLen + 16))
evt.newskt = newskt = self.reactor.createSocket(
self.addressFamily, self.socketType)
rc = _iocp.accept(self.socket.fileno(), newskt.fileno(), buff, evt)
if (rc == ERROR_IO_PENDING
or (not rc and numAccepts >= self.maxAccepts)):
break
else:
evt.ignore = True
if not self.handleAccept(rc, evt):
break
numAccepts += 1
def _acceptAddressTest(self, family, localhost):
"""
Create a C{SOCK_STREAM} connection to localhost using a socket with an
address family of C{family} and assert that the result of
L{iocpsupport.get_accept_addrs} is consistent with the result of
C{socket.getsockname} and C{socket.getpeername}.
A port starts listening (is bound) at the low-level socket without
calling accept() yet.
A client is then connected.
After the client is connected IOCP accept() is called, which is the
target of these tests.
Most of the time, the socket is ready instantly, but sometimes
the socket is not ready right away after calling IOCP accept().
It should not take more than 5 seconds for a socket to be ready, as
the client connection is already made over the loopback interface.
These are flaky tests.
Tweak the failure rate by changing the number of retries and the
wait/sleep between retries.
If you will need to update the retries to wait more than 5 seconds
for the port to be available, then there might a bug in the code and
not the test (or a very, very busy VM running the tests).
"""
msg(f"family = {family!r}")
port = socket(family, SOCK_STREAM)
self.addCleanup(port.close)
port.bind(("", 0))
port.listen(1)
client = socket(family, SOCK_STREAM)
self.addCleanup(client.close)
client.setblocking(False)
try:
client.connect((localhost, port.getsockname()[1]))
except OSError as e:
self.assertIn(e.errno, (errno.EINPROGRESS, errno.EWOULDBLOCK))
server = socket(family, SOCK_STREAM)
self.addCleanup(server.close)
buff = array("B", b"\0" * 256)
self.assertEqual(0, _iocp.accept(port.fileno(), server.fileno(), buff, None))
for attemptsRemaining in reversed(range(5)):
# Calling setsockopt after _iocp.accept might fail for both IPv4
# and IPV6 with "[Errno 10057] A request to send or receive ..."
# This is when ERROR_IO_PENDING is returned and means that the
# socket is not yet ready and accept will be handled via the
# callback event.
# For this test, with the purpose of keeping the test simple,
# we don't implement the event callback.
# The event callback functionality is tested via the high level
# tests for general reactor API.
# We retry multiple times to cover.
try:
server.setsockopt(
SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, pack("P", port.fileno())
)
break
except OSError as socketError:
# getattr is used below to make mypy happy.
if socketError.errno != getattr(errno, "WSAENOTCONN"):
# This is not the expected error so re-raise the error without retrying.
raise
# The socket is not yet ready to accept connections,
# setsockopt fails.
if attemptsRemaining == 0:
# We ran out of retries.
raise
# Without a sleep here even retrying 20 times will fail.
# This should allow other threads to execute and hopefully with the next
# try setsockopt will succeed.
time.sleep(0.2)
self.assertEqual(
(family, client.getpeername()[:2], client.getsockname()[:2]),
_iocp.get_accept_addrs(server.fileno(), buff),
)
