import unittest from test import support from unittest.case import _ExpectedFailure import errno import io import socket import select import tempfile import _testcapi import time import traceback import queue import sys import os import array import platform import contextlib from weakref import proxy import signal import math import pickle import struct try: import fcntl except ImportError: fcntl = False try: import multiprocessing except ImportError: multiprocessing = False HOST = support.HOST MSG = 'Michael Gilfix was here\u1234\r\n'.encode('utf-8') ## test unicode string and carriage return try: import _thread as thread import threading except ImportError: thread = None threading = None def _have_socket_can(): """Check whether CAN sockets are supported on this host.""" try: s = socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) except (AttributeError, socket.error, OSError): return False else: s.close() return True def _have_socket_rds(): """Check whether RDS sockets are supported on this host.""" try: s = socket.socket(socket.PF_RDS, socket.SOCK_SEQPACKET, 0) except (AttributeError, OSError): return False else: s.close() return True HAVE_SOCKET_CAN = _have_socket_can() HAVE_SOCKET_RDS = _have_socket_rds() # Size in bytes of the int type SIZEOF_INT = array.array("i").itemsize class SocketTCPTest(unittest.TestCase): def setUp(self): self.serv = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.port = support.bind_port(self.serv) self.serv.listen(1) def tearDown(self): self.serv.close() self.serv = None class SocketUDPTest(unittest.TestCase): def setUp(self): self.serv = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) self.port = support.bind_port(self.serv) def tearDown(self): self.serv.close() self.serv = None class ThreadSafeCleanupTestCase(unittest.TestCase): """Subclass of unittest.TestCase with thread-safe cleanup methods. This subclass protects the addCleanup() and doCleanups() methods with a recursive lock. """ if threading: def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self._cleanup_lock = threading.RLock() def addCleanup(self, *args, **kwargs): with self._cleanup_lock: return super().addCleanup(*args, **kwargs) def doCleanups(self, *args, **kwargs): with self._cleanup_lock: return super().doCleanups(*args, **kwargs) class SocketCANTest(unittest.TestCase): """To be able to run this test, a `vcan0` CAN interface can be created with the following commands: # modprobe vcan # ip link add dev vcan0 type vcan # ifconfig vcan0 up """ interface = 'vcan0' bufsize = 128 def setUp(self): self.s = socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) self.addCleanup(self.s.close) try: self.s.bind((self.interface,)) except socket.error: self.skipTest('network interface `%s` does not exist' % self.interface) class SocketRDSTest(unittest.TestCase): """To be able to run this test, the `rds` kernel module must be loaded: # modprobe rds """ bufsize = 8192 def setUp(self): self.serv = socket.socket(socket.PF_RDS, socket.SOCK_SEQPACKET, 0) self.addCleanup(self.serv.close) try: self.port = support.bind_port(self.serv) except OSError: self.skipTest('unable to bind RDS socket') class ThreadableTest: """Threadable Test class The ThreadableTest class makes it easy to create a threaded client/server pair from an existing unit test. To create a new threaded class from an existing unit test, use multiple inheritance: class NewClass (OldClass, ThreadableTest): pass This class defines two new fixture functions with obvious purposes for overriding: clientSetUp () clientTearDown () Any new test functions within the class must then define tests in pairs, where the test name is preceeded with a '_' to indicate the client portion of the test. Ex: def testFoo(self): # Server portion def _testFoo(self): # Client portion Any exceptions raised by the clients during their tests are caught and transferred to the main thread to alert the testing framework. Note, the server setup function cannot call any blocking functions that rely on the client thread during setup, unless serverExplicitReady() is called just before the blocking call (such as in setting up a client/server connection and performing the accept() in setUp(). """ def __init__(self): # Swap the true setup function self.__setUp = self.setUp self.__tearDown = self.tearDown self.setUp = self._setUp self.tearDown = self._tearDown def serverExplicitReady(self): """This method allows the server to explicitly indicate that it wants the client thread to proceed. This is useful if the server is about to execute a blocking routine that is dependent upon the client thread during its setup routine.""" self.server_ready.set() def _setUp(self): self.server_ready = threading.Event() self.client_ready = threading.Event() self.done = threading.Event() self.queue = queue.Queue(1) self.server_crashed = False # Do some munging to start the client test. methodname = self.id() i = methodname.rfind('.') methodname = methodname[i+1:] test_method = getattr(self, '_' + methodname) self.client_thread = thread.start_new_thread( self.clientRun, (test_method,)) try: self.__setUp() except: self.server_crashed = True raise finally: self.server_ready.set() self.client_ready.wait() def _tearDown(self): self.__tearDown() self.done.wait() if self.queue.qsize(): exc = self.queue.get() raise exc def clientRun(self, test_func): self.server_ready.wait() self.clientSetUp() self.client_ready.set() if self.server_crashed: self.clientTearDown() return if not hasattr(test_func, '__call__'): raise TypeError("test_func must be a callable function") try: test_func() except _ExpectedFailure: # We deliberately ignore expected failures pass except BaseException as e: self.queue.put(e) finally: self.clientTearDown() def clientSetUp(self): raise NotImplementedError("clientSetUp must be implemented.") def clientTearDown(self): self.done.set() thread.exit() class ThreadedTCPSocketTest(SocketTCPTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketTCPTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): self.cli = socket.socket(socket.AF_INET, socket.SOCK_STREAM) def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) class ThreadedUDPSocketTest(SocketUDPTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketUDPTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): self.cli = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) class ThreadedCANSocketTest(SocketCANTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketCANTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): self.cli = socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) try: self.cli.bind((self.interface,)) except socket.error: # skipTest should not be called here, and will be called in the # server instead pass def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) class ThreadedRDSSocketTest(SocketRDSTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketRDSTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): self.cli = socket.socket(socket.PF_RDS, socket.SOCK_SEQPACKET, 0) try: # RDS sockets must be bound explicitly to send or receive data self.cli.bind((HOST, 0)) self.cli_addr = self.cli.getsockname() except OSError: # skipTest should not be called here, and will be called in the # server instead pass def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) class SocketConnectedTest(ThreadedTCPSocketTest): """Socket tests for client-server connection. self.cli_conn is a client socket connected to the server. The setUp() method guarantees that it is connected to the server. """ def __init__(self, methodName='runTest'): ThreadedTCPSocketTest.__init__(self, methodName=methodName) def setUp(self): ThreadedTCPSocketTest.setUp(self) # Indicate explicitly we're ready for the client thread to # proceed and then perform the blocking call to accept self.serverExplicitReady() conn, addr = self.serv.accept() self.cli_conn = conn def tearDown(self): self.cli_conn.close() self.cli_conn = None ThreadedTCPSocketTest.tearDown(self) def clientSetUp(self): ThreadedTCPSocketTest.clientSetUp(self) self.cli.connect((HOST, self.port)) self.serv_conn = self.cli def clientTearDown(self): self.serv_conn.close() self.serv_conn = None ThreadedTCPSocketTest.clientTearDown(self) class SocketPairTest(unittest.TestCase, ThreadableTest): def __init__(self, methodName='runTest'): unittest.TestCase.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def setUp(self): self.serv, self.cli = socket.socketpair() def tearDown(self): self.serv.close() self.serv = None def clientSetUp(self): pass def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) # The following classes are used by the sendmsg()/recvmsg() tests. # Combining, for instance, ConnectedStreamTestMixin and TCPTestBase # gives a drop-in replacement for SocketConnectedTest, but different # address families can be used, and the attributes serv_addr and # cli_addr will be set to the addresses of the endpoints. class SocketTestBase(unittest.TestCase): """A base class for socket tests. Subclasses must provide methods newSocket() to return a new socket and bindSock(sock) to bind it to an unused address. Creates a socket self.serv and sets self.serv_addr to its address. """ def setUp(self): self.serv = self.newSocket() self.bindServer() def bindServer(self): """Bind server socket and set self.serv_addr to its address.""" self.bindSock(self.serv) self.serv_addr = self.serv.getsockname() def tearDown(self): self.serv.close() self.serv = None class SocketListeningTestMixin(SocketTestBase): """Mixin to listen on the server socket.""" def setUp(self): super().setUp() self.serv.listen(1) class ThreadedSocketTestMixin(ThreadSafeCleanupTestCase, SocketTestBase, ThreadableTest): """Mixin to add client socket and allow client/server tests. Client socket is self.cli and its address is self.cli_addr. See ThreadableTest for usage information. """ def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) ThreadableTest.__init__(self) def clientSetUp(self): self.cli = self.newClientSocket() self.bindClient() def newClientSocket(self): """Return a new socket for use as client.""" return self.newSocket() def bindClient(self): """Bind client socket and set self.cli_addr to its address.""" self.bindSock(self.cli) self.cli_addr = self.cli.getsockname() def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) class ConnectedStreamTestMixin(SocketListeningTestMixin, ThreadedSocketTestMixin): """Mixin to allow client/server stream tests with connected client. Server's socket representing connection to client is self.cli_conn and client's connection to server is self.serv_conn. (Based on SocketConnectedTest.) """ def setUp(self): super().setUp() # Indicate explicitly we're ready for the client thread to # proceed and then perform the blocking call to accept self.serverExplicitReady() conn, addr = self.serv.accept() self.cli_conn = conn def tearDown(self): self.cli_conn.close() self.cli_conn = None super().tearDown() def clientSetUp(self): super().clientSetUp() self.cli.connect(self.serv_addr) self.serv_conn = self.cli def clientTearDown(self): self.serv_conn.close() self.serv_conn = None super().clientTearDown() class UnixSocketTestBase(SocketTestBase): """Base class for Unix-domain socket tests.""" # This class is used for file descriptor passing tests, so we # create the sockets in a private directory so that other users # can't send anything that might be problematic for a privileged # user running the tests. def setUp(self): self.dir_path = tempfile.mkdtemp() self.addCleanup(os.rmdir, self.dir_path) super().setUp() def bindSock(self, sock): path = tempfile.mktemp(dir=self.dir_path) sock.bind(path) self.addCleanup(support.unlink, path) class UnixStreamBase(UnixSocketTestBase): """Base class for Unix-domain SOCK_STREAM tests.""" def newSocket(self): return socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) class InetTestBase(SocketTestBase): """Base class for IPv4 socket tests.""" host = HOST def setUp(self): super().setUp() self.port = self.serv_addr[1] def bindSock(self, sock): support.bind_port(sock, host=self.host) class TCPTestBase(InetTestBase): """Base class for TCP-over-IPv4 tests.""" def newSocket(self): return socket.socket(socket.AF_INET, socket.SOCK_STREAM) class UDPTestBase(InetTestBase): """Base class for UDP-over-IPv4 tests.""" def newSocket(self): return socket.socket(socket.AF_INET, socket.SOCK_DGRAM) class SCTPStreamBase(InetTestBase): """Base class for SCTP tests in one-to-one (SOCK_STREAM) mode.""" def newSocket(self): return socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_SCTP) class Inet6TestBase(InetTestBase): """Base class for IPv6 socket tests.""" # Don't use "localhost" here - it may not have an IPv6 address # assigned to it by default (e.g. in /etc/hosts), and if someone # has assigned it an IPv4-mapped address, then it's unlikely to # work with the full IPv6 API. host = "::1" class UDP6TestBase(Inet6TestBase): """Base class for UDP-over-IPv6 tests.""" def newSocket(self): return socket.socket(socket.AF_INET6, socket.SOCK_DGRAM) # Test-skipping decorators for use with ThreadableTest. def skipWithClientIf(condition, reason): """Skip decorated test if condition is true, add client_skip decorator. If the decorated object is not a class, sets its attribute "client_skip" to a decorator which will return an empty function if the test is to be skipped, or the original function if it is not. This can be used to avoid running the client part of a skipped test when using ThreadableTest. """ def client_pass(*args, **kwargs): pass def skipdec(obj): retval = unittest.skip(reason)(obj) if not isinstance(obj, type): retval.client_skip = lambda f: client_pass return retval def noskipdec(obj): if not (isinstance(obj, type) or hasattr(obj, "client_skip")): obj.client_skip = lambda f: f return obj return skipdec if condition else noskipdec def requireAttrs(obj, *attributes): """Skip decorated test if obj is missing any of the given attributes. Sets client_skip attribute as skipWithClientIf() does. """ missing = [name for name in attributes if not hasattr(obj, name)] return skipWithClientIf( missing, "don't have " + ", ".join(name for name in missing)) def requireSocket(*args): """Skip decorated test if a socket cannot be created with given arguments. When an argument is given as a string, will use the value of that attribute of the socket module, or skip the test if it doesn't exist. Sets client_skip attribute as skipWithClientIf() does. """ err = None missing = [obj for obj in args if isinstance(obj, str) and not hasattr(socket, obj)] if missing: err = "don't have " + ", ".join(name for name in missing) else: callargs = [getattr(socket, obj) if isinstance(obj, str) else obj for obj in args] try: s = socket.socket(*callargs) except socket.error as e: # XXX: check errno? err = str(e) else: s.close() return skipWithClientIf( err is not None, "can't create socket({0}): {1}".format( ", ".join(str(o) for o in args), err)) ####################################################################### ## Begin Tests class GeneralModuleTests(unittest.TestCase): def test_repr(self): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.addCleanup(s.close) self.assertTrue(repr(s).startswith("= 0, "Error resolving host to ip.") try: hname, aliases, ipaddrs = socket.gethostbyaddr(ip) except socket.error: # Probably a similar problem as above; skip this test self.skipTest('name lookup failure') all_host_names = [hostname, hname] + aliases fqhn = socket.getfqdn(ip) if not fqhn in all_host_names: self.fail("Error testing host resolution mechanisms. (fqdn: %s, all: %s)" % (fqhn, repr(all_host_names))) @unittest.skipUnless(hasattr(socket, 'sethostname'), "test needs socket.sethostname()") @unittest.skipUnless(hasattr(socket, 'gethostname'), "test needs socket.gethostname()") def test_sethostname(self): oldhn = socket.gethostname() try: socket.sethostname('new') except socket.error as e: if e.errno == errno.EPERM: self.skipTest("test should be run as root") else: raise try: # running test as root! self.assertEqual(socket.gethostname(), 'new') # Should work with bytes objects too socket.sethostname(b'bar') self.assertEqual(socket.gethostname(), 'bar') finally: socket.sethostname(oldhn) @unittest.skipUnless(hasattr(socket, 'if_nameindex'), 'socket.if_nameindex() not available.') def testInterfaceNameIndex(self): interfaces = socket.if_nameindex() for index, name in interfaces: self.assertIsInstance(index, int) self.assertIsInstance(name, str) # interface indices are non-zero integers self.assertGreater(index, 0) _index = socket.if_nametoindex(name) self.assertIsInstance(_index, int) self.assertEqual(index, _index) _name = socket.if_indextoname(index) self.assertIsInstance(_name, str) self.assertEqual(name, _name) @unittest.skipUnless(hasattr(socket, 'if_nameindex'), 'socket.if_nameindex() not available.') def testInvalidInterfaceNameIndex(self): # test nonexistent interface index/name self.assertRaises(socket.error, socket.if_indextoname, 0) self.assertRaises(socket.error, socket.if_nametoindex, '_DEADBEEF') # test with invalid values self.assertRaises(TypeError, socket.if_nametoindex, 0) self.assertRaises(TypeError, socket.if_indextoname, '_DEADBEEF') @unittest.skipUnless(hasattr(sys, 'getrefcount'), 'test needs sys.getrefcount()') def testRefCountGetNameInfo(self): # Testing reference count for getnameinfo try: # On some versions, this loses a reference orig = sys.getrefcount(__name__) socket.getnameinfo(__name__,0) except TypeError: if sys.getrefcount(__name__) != orig: self.fail("socket.getnameinfo loses a reference") def testInterpreterCrash(self): # Making sure getnameinfo doesn't crash the interpreter try: # On some versions, this crashes the interpreter. socket.getnameinfo(('x', 0, 0, 0), 0) except socket.error: pass def testNtoH(self): # This just checks that htons etc. are their own inverse, # when looking at the lower 16 or 32 bits. sizes = {socket.htonl: 32, socket.ntohl: 32, socket.htons: 16, socket.ntohs: 16} for func, size in sizes.items(): mask = (1<") def test_unusable_closed_socketio(self): with socket.socket() as sock: fp = sock.makefile("rb", buffering=0) self.assertTrue(fp.readable()) self.assertFalse(fp.writable()) self.assertFalse(fp.seekable()) fp.close() self.assertRaises(ValueError, fp.readable) self.assertRaises(ValueError, fp.writable) self.assertRaises(ValueError, fp.seekable) def test_pickle(self): sock = socket.socket() with sock: for protocol in range(pickle.HIGHEST_PROTOCOL + 1): self.assertRaises(TypeError, pickle.dumps, sock, protocol) def test_listen_backlog(self): for backlog in 0, -1: srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM) srv.bind((HOST, 0)) srv.listen(backlog) srv.close() # Issue 15989 srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM) srv.bind((HOST, 0)) self.assertRaises(OverflowError, srv.listen, _testcapi.INT_MAX + 1) srv.close() @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') def test_flowinfo(self): self.assertRaises(OverflowError, socket.getnameinfo, ('::1',0, 0xffffffff), 0) with socket.socket(socket.AF_INET6, socket.SOCK_STREAM) as s: self.assertRaises(OverflowError, s.bind, ('::1', 0, -10)) @unittest.skipUnless(HAVE_SOCKET_CAN, 'SocketCan required for this test.') class BasicCANTest(unittest.TestCase): def testCrucialConstants(self): socket.AF_CAN socket.PF_CAN socket.CAN_RAW def testCreateSocket(self): with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s: pass def testBindAny(self): with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s: s.bind(('', )) def testTooLongInterfaceName(self): # most systems limit IFNAMSIZ to 16, take 1024 to be sure with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s: self.assertRaisesRegex(socket.error, 'interface name too long', s.bind, ('x' * 1024,)) @unittest.skipUnless(hasattr(socket, "CAN_RAW_LOOPBACK"), 'socket.CAN_RAW_LOOPBACK required for this test.') def testLoopback(self): with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s: for loopback in (0, 1): s.setsockopt(socket.SOL_CAN_RAW, socket.CAN_RAW_LOOPBACK, loopback) self.assertEqual(loopback, s.getsockopt(socket.SOL_CAN_RAW, socket.CAN_RAW_LOOPBACK)) @unittest.skipUnless(hasattr(socket, "CAN_RAW_FILTER"), 'socket.CAN_RAW_FILTER required for this test.') def testFilter(self): can_id, can_mask = 0x200, 0x700 can_filter = struct.pack("=II", can_id, can_mask) with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s: s.setsockopt(socket.SOL_CAN_RAW, socket.CAN_RAW_FILTER, can_filter) self.assertEqual(can_filter, s.getsockopt(socket.SOL_CAN_RAW, socket.CAN_RAW_FILTER, 8)) @unittest.skipUnless(HAVE_SOCKET_CAN, 'SocketCan required for this test.') @unittest.skipUnless(thread, 'Threading required for this test.') class CANTest(ThreadedCANSocketTest): """The CAN frame structure is defined in : struct can_frame { canid_t can_id; /* 32 bit CAN_ID + EFF/RTR/ERR flags */ __u8 can_dlc; /* data length code: 0 .. 8 */ __u8 data[8] __attribute__((aligned(8))); }; """ can_frame_fmt = "=IB3x8s" def __init__(self, methodName='runTest'): ThreadedCANSocketTest.__init__(self, methodName=methodName) @classmethod def build_can_frame(cls, can_id, data): """Build a CAN frame.""" can_dlc = len(data) data = data.ljust(8, b'\x00') return struct.pack(cls.can_frame_fmt, can_id, can_dlc, data) @classmethod def dissect_can_frame(cls, frame): """Dissect a CAN frame.""" can_id, can_dlc, data = struct.unpack(cls.can_frame_fmt, frame) return (can_id, can_dlc, data[:can_dlc]) def testSendFrame(self): cf, addr = self.s.recvfrom(self.bufsize) self.assertEqual(self.cf, cf) self.assertEqual(addr[0], self.interface) self.assertEqual(addr[1], socket.AF_CAN) def _testSendFrame(self): self.cf = self.build_can_frame(0x00, b'\x01\x02\x03\x04\x05') self.cli.send(self.cf) def testSendMaxFrame(self): cf, addr = self.s.recvfrom(self.bufsize) self.assertEqual(self.cf, cf) def _testSendMaxFrame(self): self.cf = self.build_can_frame(0x00, b'\x07' * 8) self.cli.send(self.cf) def testSendMultiFrames(self): cf, addr = self.s.recvfrom(self.bufsize) self.assertEqual(self.cf1, cf) cf, addr = self.s.recvfrom(self.bufsize) self.assertEqual(self.cf2, cf) def _testSendMultiFrames(self): self.cf1 = self.build_can_frame(0x07, b'\x44\x33\x22\x11') self.cli.send(self.cf1) self.cf2 = self.build_can_frame(0x12, b'\x99\x22\x33') self.cli.send(self.cf2) @unittest.skipUnless(HAVE_SOCKET_RDS, 'RDS sockets required for this test.') class BasicRDSTest(unittest.TestCase): def testCrucialConstants(self): socket.AF_RDS socket.PF_RDS def testCreateSocket(self): with socket.socket(socket.PF_RDS, socket.SOCK_SEQPACKET, 0) as s: pass def testSocketBufferSize(self): bufsize = 16384 with socket.socket(socket.PF_RDS, socket.SOCK_SEQPACKET, 0) as s: s.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, bufsize) s.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, bufsize) @unittest.skipUnless(HAVE_SOCKET_RDS, 'RDS sockets required for this test.') @unittest.skipUnless(thread, 'Threading required for this test.') class RDSTest(ThreadedRDSSocketTest): def __init__(self, methodName='runTest'): ThreadedRDSSocketTest.__init__(self, methodName=methodName) def setUp(self): super().setUp() self.evt = threading.Event() def testSendAndRecv(self): data, addr = self.serv.recvfrom(self.bufsize) self.assertEqual(self.data, data) self.assertEqual(self.cli_addr, addr) def _testSendAndRecv(self): self.data = b'spam' self.cli.sendto(self.data, 0, (HOST, self.port)) def testPeek(self): data, addr = self.serv.recvfrom(self.bufsize, socket.MSG_PEEK) self.assertEqual(self.data, data) data, addr = self.serv.recvfrom(self.bufsize) self.assertEqual(self.data, data) def _testPeek(self): self.data = b'spam' self.cli.sendto(self.data, 0, (HOST, self.port)) @requireAttrs(socket.socket, 'recvmsg') def testSendAndRecvMsg(self): data, ancdata, msg_flags, addr = self.serv.recvmsg(self.bufsize) self.assertEqual(self.data, data) @requireAttrs(socket.socket, 'sendmsg') def _testSendAndRecvMsg(self): self.data = b'hello ' * 10 self.cli.sendmsg([self.data], (), 0, (HOST, self.port)) def testSendAndRecvMulti(self): data, addr = self.serv.recvfrom(self.bufsize) self.assertEqual(self.data1, data) data, addr = self.serv.recvfrom(self.bufsize) self.assertEqual(self.data2, data) def _testSendAndRecvMulti(self): self.data1 = b'bacon' self.cli.sendto(self.data1, 0, (HOST, self.port)) self.data2 = b'egg' self.cli.sendto(self.data2, 0, (HOST, self.port)) def testSelect(self): r, w, x = select.select([self.serv], [], [], 3.0) self.assertIn(self.serv, r) data, addr = self.serv.recvfrom(self.bufsize) self.assertEqual(self.data, data) def _testSelect(self): self.data = b'select' self.cli.sendto(self.data, 0, (HOST, self.port)) def testCongestion(self): # wait until the sender is done self.evt.wait() def _testCongestion(self): # test the behavior in case of congestion self.data = b'fill' self.cli.setblocking(False) try: # try to lower the receiver's socket buffer size self.cli.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 16384) except OSError: pass with self.assertRaises(OSError) as cm: try: # fill the receiver's socket buffer while True: self.cli.sendto(self.data, 0, (HOST, self.port)) finally: # signal the receiver we're done self.evt.set() # sendto() should have failed with ENOBUFS self.assertEqual(cm.exception.errno, errno.ENOBUFS) # and we should have received a congestion notification through poll r, w, x = select.select([self.serv], [], [], 3.0) self.assertIn(self.serv, r) @unittest.skipUnless(thread, 'Threading required for this test.') class BasicTCPTest(SocketConnectedTest): def __init__(self, methodName='runTest'): SocketConnectedTest.__init__(self, methodName=methodName) def testRecv(self): # Testing large receive over TCP msg = self.cli_conn.recv(1024) self.assertEqual(msg, MSG) def _testRecv(self): self.serv_conn.send(MSG) def testOverFlowRecv(self): # Testing receive in chunks over TCP seg1 = self.cli_conn.recv(len(MSG) - 3) seg2 = self.cli_conn.recv(1024) msg = seg1 + seg2 self.assertEqual(msg, MSG) def _testOverFlowRecv(self): self.serv_conn.send(MSG) def testRecvFrom(self): # Testing large recvfrom() over TCP msg, addr = self.cli_conn.recvfrom(1024) self.assertEqual(msg, MSG) def _testRecvFrom(self): self.serv_conn.send(MSG) def testOverFlowRecvFrom(self): # Testing recvfrom() in chunks over TCP seg1, addr = self.cli_conn.recvfrom(len(MSG)-3) seg2, addr = self.cli_conn.recvfrom(1024) msg = seg1 + seg2 self.assertEqual(msg, MSG) def _testOverFlowRecvFrom(self): self.serv_conn.send(MSG) def testSendAll(self): # Testing sendall() with a 2048 byte string over TCP msg = b'' while 1: read = self.cli_conn.recv(1024) if not read: break msg += read self.assertEqual(msg, b'f' * 2048) def _testSendAll(self): big_chunk = b'f' * 2048 self.serv_conn.sendall(big_chunk) def testFromFd(self): # Testing fromfd() fd = self.cli_conn.fileno() sock = socket.fromfd(fd, socket.AF_INET, socket.SOCK_STREAM) self.addCleanup(sock.close) self.assertIsInstance(sock, socket.socket) msg = sock.recv(1024) self.assertEqual(msg, MSG) def _testFromFd(self): self.serv_conn.send(MSG) def testDup(self): # Testing dup() sock = self.cli_conn.dup() self.addCleanup(sock.close) msg = sock.recv(1024) self.assertEqual(msg, MSG) def _testDup(self): self.serv_conn.send(MSG) def testShutdown(self): # Testing shutdown() msg = self.cli_conn.recv(1024) self.assertEqual(msg, MSG) # wait for _testShutdown to finish: on OS X, when the server # closes the connection the client also becomes disconnected, # and the client's shutdown call will fail. (Issue #4397.) self.done.wait() def _testShutdown(self): self.serv_conn.send(MSG) # Issue 15989 self.assertRaises(OverflowError, self.serv_conn.shutdown, _testcapi.INT_MAX + 1) self.assertRaises(OverflowError, self.serv_conn.shutdown, 2 + (_testcapi.UINT_MAX + 1)) self.serv_conn.shutdown(2) def testDetach(self): # Testing detach() fileno = self.cli_conn.fileno() f = self.cli_conn.detach() self.assertEqual(f, fileno) # cli_conn cannot be used anymore... self.assertTrue(self.cli_conn._closed) self.assertRaises(socket.error, self.cli_conn.recv, 1024) self.cli_conn.close() # ...but we can create another socket using the (still open) # file descriptor sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, fileno=f) self.addCleanup(sock.close) msg = sock.recv(1024) self.assertEqual(msg, MSG) def _testDetach(self): self.serv_conn.send(MSG) @unittest.skipUnless(thread, 'Threading required for this test.') class BasicUDPTest(ThreadedUDPSocketTest): def __init__(self, methodName='runTest'): ThreadedUDPSocketTest.__init__(self, methodName=methodName) def testSendtoAndRecv(self): # Testing sendto() and Recv() over UDP msg = self.serv.recv(len(MSG)) self.assertEqual(msg, MSG) def _testSendtoAndRecv(self): self.cli.sendto(MSG, 0, (HOST, self.port)) def testRecvFrom(self): # Testing recvfrom() over UDP msg, addr = self.serv.recvfrom(len(MSG)) self.assertEqual(msg, MSG) def _testRecvFrom(self): self.cli.sendto(MSG, 0, (HOST, self.port)) def testRecvFromNegative(self): # Negative lengths passed to recvfrom should give ValueError. self.assertRaises(ValueError, self.serv.recvfrom, -1) def _testRecvFromNegative(self): self.cli.sendto(MSG, 0, (HOST, self.port)) # Tests for the sendmsg()/recvmsg() interface. Where possible, the # same test code is used with different families and types of socket # (e.g. stream, datagram), and tests using recvmsg() are repeated # using recvmsg_into(). # # The generic test classes such as SendmsgTests and # RecvmsgGenericTests inherit from SendrecvmsgBase and expect to be # supplied with sockets cli_sock and serv_sock representing the # client's and the server's end of the connection respectively, and # attributes cli_addr and serv_addr holding their (numeric where # appropriate) addresses. # # The final concrete test classes combine these with subclasses of # SocketTestBase which set up client and server sockets of a specific # type, and with subclasses of SendrecvmsgBase such as # SendrecvmsgDgramBase and SendrecvmsgConnectedBase which map these # sockets to cli_sock and serv_sock and override the methods and # attributes of SendrecvmsgBase to fill in destination addresses if # needed when sending, check for specific flags in msg_flags, etc. # # RecvmsgIntoMixin provides a version of doRecvmsg() implemented using # recvmsg_into(). # XXX: like the other datagram (UDP) tests in this module, the code # here assumes that datagram delivery on the local machine will be # reliable. class SendrecvmsgBase(ThreadSafeCleanupTestCase): # Base class for sendmsg()/recvmsg() tests. # Time in seconds to wait before considering a test failed, or # None for no timeout. Not all tests actually set a timeout. fail_timeout = 3.0 def setUp(self): self.misc_event = threading.Event() super().setUp() def sendToServer(self, msg): # Send msg to the server. return self.cli_sock.send(msg) # Tuple of alternative default arguments for sendmsg() when called # via sendmsgToServer() (e.g. to include a destination address). sendmsg_to_server_defaults = () def sendmsgToServer(self, *args): # Call sendmsg() on self.cli_sock with the given arguments, # filling in any arguments which are not supplied with the # corresponding items of self.sendmsg_to_server_defaults, if # any. return self.cli_sock.sendmsg( *(args + self.sendmsg_to_server_defaults[len(args):])) def doRecvmsg(self, sock, bufsize, *args): # Call recvmsg() on sock with given arguments and return its # result. Should be used for tests which can use either # recvmsg() or recvmsg_into() - RecvmsgIntoMixin overrides # this method with one which emulates it using recvmsg_into(), # thus allowing the same test to be used for both methods. result = sock.recvmsg(bufsize, *args) self.registerRecvmsgResult(result) return result def registerRecvmsgResult(self, result): # Called by doRecvmsg() with the return value of recvmsg() or # recvmsg_into(). Can be overridden to arrange cleanup based # on the returned ancillary data, for instance. pass def checkRecvmsgAddress(self, addr1, addr2): # Called to compare the received address with the address of # the peer. self.assertEqual(addr1, addr2) # Flags that are normally unset in msg_flags msg_flags_common_unset = 0 for name in ("MSG_CTRUNC", "MSG_OOB"): msg_flags_common_unset |= getattr(socket, name, 0) # Flags that are normally set msg_flags_common_set = 0 # Flags set when a complete record has been received (e.g. MSG_EOR # for SCTP) msg_flags_eor_indicator = 0 # Flags set when a complete record has not been received # (e.g. MSG_TRUNC for datagram sockets) msg_flags_non_eor_indicator = 0 def checkFlags(self, flags, eor=None, checkset=0, checkunset=0, ignore=0): # Method to check the value of msg_flags returned by recvmsg[_into](). # # Checks that all bits in msg_flags_common_set attribute are # set in "flags" and all bits in msg_flags_common_unset are # unset. # # The "eor" argument specifies whether the flags should # indicate that a full record (or datagram) has been received. # If "eor" is None, no checks are done; otherwise, checks # that: # # * if "eor" is true, all bits in msg_flags_eor_indicator are # set and all bits in msg_flags_non_eor_indicator are unset # # * if "eor" is false, all bits in msg_flags_non_eor_indicator # are set and all bits in msg_flags_eor_indicator are unset # # If "checkset" and/or "checkunset" are supplied, they require # the given bits to be set or unset respectively, overriding # what the attributes require for those bits. # # If any bits are set in "ignore", they will not be checked, # regardless of the other inputs. # # Will raise Exception if the inputs require a bit to be both # set and unset, and it is not ignored. defaultset = self.msg_flags_common_set defaultunset = self.msg_flags_common_unset if eor: defaultset |= self.msg_flags_eor_indicator defaultunset |= self.msg_flags_non_eor_indicator elif eor is not None: defaultset |= self.msg_flags_non_eor_indicator defaultunset |= self.msg_flags_eor_indicator # Function arguments override defaults defaultset &= ~checkunset defaultunset &= ~checkset # Merge arguments with remaining defaults, and check for conflicts checkset |= defaultset checkunset |= defaultunset inboth = checkset & checkunset & ~ignore if inboth: raise Exception("contradictory set, unset requirements for flags " "{0:#x}".format(inboth)) # Compare with given msg_flags value mask = (checkset | checkunset) & ~ignore self.assertEqual(flags & mask, checkset & mask) class RecvmsgIntoMixin(SendrecvmsgBase): # Mixin to implement doRecvmsg() using recvmsg_into(). def doRecvmsg(self, sock, bufsize, *args): buf = bytearray(bufsize) result = sock.recvmsg_into([buf], *args) self.registerRecvmsgResult(result) self.assertGreaterEqual(result[0], 0) self.assertLessEqual(result[0], bufsize) return (bytes(buf[:result[0]]),) + result[1:] class SendrecvmsgDgramFlagsBase(SendrecvmsgBase): # Defines flags to be checked in msg_flags for datagram sockets. @property def msg_flags_non_eor_indicator(self): return super().msg_flags_non_eor_indicator | socket.MSG_TRUNC class SendrecvmsgSCTPFlagsBase(SendrecvmsgBase): # Defines flags to be checked in msg_flags for SCTP sockets. @property def msg_flags_eor_indicator(self): return super().msg_flags_eor_indicator | socket.MSG_EOR class SendrecvmsgConnectionlessBase(SendrecvmsgBase): # Base class for tests on connectionless-mode sockets. Users must # supply sockets on attributes cli and serv to be mapped to # cli_sock and serv_sock respectively. @property def serv_sock(self): return self.serv @property def cli_sock(self): return self.cli @property def sendmsg_to_server_defaults(self): return ([], [], 0, self.serv_addr) def sendToServer(self, msg): return self.cli_sock.sendto(msg, self.serv_addr) class SendrecvmsgConnectedBase(SendrecvmsgBase): # Base class for tests on connected sockets. Users must supply # sockets on attributes serv_conn and cli_conn (representing the # connections *to* the server and the client), to be mapped to # cli_sock and serv_sock respectively. @property def serv_sock(self): return self.cli_conn @property def cli_sock(self): return self.serv_conn def checkRecvmsgAddress(self, addr1, addr2): # Address is currently "unspecified" for a connected socket, # so we don't examine it pass class SendrecvmsgServerTimeoutBase(SendrecvmsgBase): # Base class to set a timeout on server's socket. def setUp(self): super().setUp() self.serv_sock.settimeout(self.fail_timeout) class SendmsgTests(SendrecvmsgServerTimeoutBase): # Tests for sendmsg() which can use any socket type and do not # involve recvmsg() or recvmsg_into(). def testSendmsg(self): # Send a simple message with sendmsg(). self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsg(self): self.assertEqual(self.sendmsgToServer([MSG]), len(MSG)) def testSendmsgDataGenerator(self): # Send from buffer obtained from a generator (not a sequence). self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsgDataGenerator(self): self.assertEqual(self.sendmsgToServer((o for o in [MSG])), len(MSG)) def testSendmsgAncillaryGenerator(self): # Gather (empty) ancillary data from a generator. self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsgAncillaryGenerator(self): self.assertEqual(self.sendmsgToServer([MSG], (o for o in [])), len(MSG)) def testSendmsgArray(self): # Send data from an array instead of the usual bytes object. self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsgArray(self): self.assertEqual(self.sendmsgToServer([array.array("B", MSG)]), len(MSG)) def testSendmsgGather(self): # Send message data from more than one buffer (gather write). self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsgGather(self): self.assertEqual(self.sendmsgToServer([MSG[:3], MSG[3:]]), len(MSG)) def testSendmsgBadArgs(self): # Check that sendmsg() rejects invalid arguments. self.assertEqual(self.serv_sock.recv(1000), b"done") def _testSendmsgBadArgs(self): self.assertRaises(TypeError, self.cli_sock.sendmsg) self.assertRaises(TypeError, self.sendmsgToServer, b"not in an iterable") self.assertRaises(TypeError, self.sendmsgToServer, object()) self.assertRaises(TypeError, self.sendmsgToServer, [object()]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG, object()]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], object()) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [], object()) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [], 0, object()) self.sendToServer(b"done") def testSendmsgBadCmsg(self): # Check that invalid ancillary data items are rejected. self.assertEqual(self.serv_sock.recv(1000), b"done") def _testSendmsgBadCmsg(self): self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [object()]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(object(), 0, b"data")]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(0, object(), b"data")]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(0, 0, object())]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(0, 0)]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(0, 0, b"data", 42)]) self.sendToServer(b"done") @requireAttrs(socket, "CMSG_SPACE") def testSendmsgBadMultiCmsg(self): # Check that invalid ancillary data items are rejected when # more than one item is present. self.assertEqual(self.serv_sock.recv(1000), b"done") @testSendmsgBadMultiCmsg.client_skip def _testSendmsgBadMultiCmsg(self): self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [0, 0, b""]) self.assertRaises(TypeError, self.sendmsgToServer, [MSG], [(0, 0, b""), object()]) self.sendToServer(b"done") def testSendmsgExcessCmsgReject(self): # Check that sendmsg() rejects excess ancillary data items # when the number that can be sent is limited. self.assertEqual(self.serv_sock.recv(1000), b"done") def _testSendmsgExcessCmsgReject(self): if not hasattr(socket, "CMSG_SPACE"): # Can only send one item with self.assertRaises(socket.error) as cm: self.sendmsgToServer([MSG], [(0, 0, b""), (0, 0, b"")]) self.assertIsNone(cm.exception.errno) self.sendToServer(b"done") def testSendmsgAfterClose(self): # Check that sendmsg() fails on a closed socket. pass def _testSendmsgAfterClose(self): self.cli_sock.close() self.assertRaises(socket.error, self.sendmsgToServer, [MSG]) class SendmsgStreamTests(SendmsgTests): # Tests for sendmsg() which require a stream socket and do not # involve recvmsg() or recvmsg_into(). def testSendmsgExplicitNoneAddr(self): # Check that peer address can be specified as None. self.assertEqual(self.serv_sock.recv(len(MSG)), MSG) def _testSendmsgExplicitNoneAddr(self): self.assertEqual(self.sendmsgToServer([MSG], [], 0, None), len(MSG)) def testSendmsgTimeout(self): # Check that timeout works with sendmsg(). self.assertEqual(self.serv_sock.recv(512), b"a"*512) self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) def _testSendmsgTimeout(self): try: self.cli_sock.settimeout(0.03) with self.assertRaises(socket.timeout): while True: self.sendmsgToServer([b"a"*512]) finally: self.misc_event.set() # XXX: would be nice to have more tests for sendmsg flags argument. # Linux supports MSG_DONTWAIT when sending, but in general, it # only works when receiving. Could add other platforms if they # support it too. @skipWithClientIf(sys.platform not in {"linux2"}, "MSG_DONTWAIT not known to work on this platform when " "sending") def testSendmsgDontWait(self): # Check that MSG_DONTWAIT in flags causes non-blocking behaviour. self.assertEqual(self.serv_sock.recv(512), b"a"*512) self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) @testSendmsgDontWait.client_skip def _testSendmsgDontWait(self): try: with self.assertRaises(socket.error) as cm: while True: self.sendmsgToServer([b"a"*512], [], socket.MSG_DONTWAIT) self.assertIn(cm.exception.errno, (errno.EAGAIN, errno.EWOULDBLOCK)) finally: self.misc_event.set() class SendmsgConnectionlessTests(SendmsgTests): # Tests for sendmsg() which require a connectionless-mode # (e.g. datagram) socket, and do not involve recvmsg() or # recvmsg_into(). def testSendmsgNoDestAddr(self): # Check that sendmsg() fails when no destination address is # given for unconnected socket. pass def _testSendmsgNoDestAddr(self): self.assertRaises(socket.error, self.cli_sock.sendmsg, [MSG]) self.assertRaises(socket.error, self.cli_sock.sendmsg, [MSG], [], 0, None) class RecvmsgGenericTests(SendrecvmsgBase): # Tests for recvmsg() which can also be emulated using # recvmsg_into(), and can use any socket type. def testRecvmsg(self): # Receive a simple message with recvmsg[_into](). msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG)) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsg(self): self.sendToServer(MSG) def testRecvmsgExplicitDefaults(self): # Test recvmsg[_into]() with default arguments provided explicitly. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 0, 0) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgExplicitDefaults(self): self.sendToServer(MSG) def testRecvmsgShorter(self): # Receive a message smaller than buffer. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG) + 42) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgShorter(self): self.sendToServer(MSG) # FreeBSD < 8 doesn't always set the MSG_TRUNC flag when a truncated # datagram is received (issue #13001). @support.requires_freebsd_version(8) def testRecvmsgTrunc(self): # Receive part of message, check for truncation indicators. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG) - 3) self.assertEqual(msg, MSG[:-3]) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=False) @support.requires_freebsd_version(8) def _testRecvmsgTrunc(self): self.sendToServer(MSG) def testRecvmsgShortAncillaryBuf(self): # Test ancillary data buffer too small to hold any ancillary data. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 1) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgShortAncillaryBuf(self): self.sendToServer(MSG) def testRecvmsgLongAncillaryBuf(self): # Test large ancillary data buffer. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 10240) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgLongAncillaryBuf(self): self.sendToServer(MSG) def testRecvmsgAfterClose(self): # Check that recvmsg[_into]() fails on a closed socket. self.serv_sock.close() self.assertRaises(socket.error, self.doRecvmsg, self.serv_sock, 1024) def _testRecvmsgAfterClose(self): pass def testRecvmsgTimeout(self): # Check that timeout works. try: self.serv_sock.settimeout(0.03) self.assertRaises(socket.timeout, self.doRecvmsg, self.serv_sock, len(MSG)) finally: self.misc_event.set() def _testRecvmsgTimeout(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) @requireAttrs(socket, "MSG_PEEK") def testRecvmsgPeek(self): # Check that MSG_PEEK in flags enables examination of pending # data without consuming it. # Receive part of data with MSG_PEEK. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG) - 3, 0, socket.MSG_PEEK) self.assertEqual(msg, MSG[:-3]) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) # Ignoring MSG_TRUNC here (so this test is the same for stream # and datagram sockets). Some wording in POSIX seems to # suggest that it needn't be set when peeking, but that may # just be a slip. self.checkFlags(flags, eor=False, ignore=getattr(socket, "MSG_TRUNC", 0)) # Receive all data with MSG_PEEK. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 0, socket.MSG_PEEK) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) # Check that the same data can still be received normally. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG)) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) @testRecvmsgPeek.client_skip def _testRecvmsgPeek(self): self.sendToServer(MSG) @requireAttrs(socket.socket, "sendmsg") def testRecvmsgFromSendmsg(self): # Test receiving with recvmsg[_into]() when message is sent # using sendmsg(). self.serv_sock.settimeout(self.fail_timeout) msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG)) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) @testRecvmsgFromSendmsg.client_skip def _testRecvmsgFromSendmsg(self): self.assertEqual(self.sendmsgToServer([MSG[:3], MSG[3:]]), len(MSG)) class RecvmsgGenericStreamTests(RecvmsgGenericTests): # Tests which require a stream socket and can use either recvmsg() # or recvmsg_into(). def testRecvmsgEOF(self): # Receive end-of-stream indicator (b"", peer socket closed). msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, 1024) self.assertEqual(msg, b"") self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=None) # Might not have end-of-record marker def _testRecvmsgEOF(self): self.cli_sock.close() def testRecvmsgOverflow(self): # Receive a message in more than one chunk. seg1, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG) - 3) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=False) seg2, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, 1024) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) msg = seg1 + seg2 self.assertEqual(msg, MSG) def _testRecvmsgOverflow(self): self.sendToServer(MSG) class RecvmsgTests(RecvmsgGenericTests): # Tests for recvmsg() which can use any socket type. def testRecvmsgBadArgs(self): # Check that recvmsg() rejects invalid arguments. self.assertRaises(TypeError, self.serv_sock.recvmsg) self.assertRaises(ValueError, self.serv_sock.recvmsg, -1, 0, 0) self.assertRaises(ValueError, self.serv_sock.recvmsg, len(MSG), -1, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg, [bytearray(10)], 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg, object(), 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg, len(MSG), object(), 0) self.assertRaises(TypeError, self.serv_sock.recvmsg, len(MSG), 0, object()) msg, ancdata, flags, addr = self.serv_sock.recvmsg(len(MSG), 0, 0) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgBadArgs(self): self.sendToServer(MSG) class RecvmsgIntoTests(RecvmsgIntoMixin, RecvmsgGenericTests): # Tests for recvmsg_into() which can use any socket type. def testRecvmsgIntoBadArgs(self): # Check that recvmsg_into() rejects invalid arguments. buf = bytearray(len(MSG)) self.assertRaises(TypeError, self.serv_sock.recvmsg_into) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, len(MSG), 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, buf, 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, [object()], 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, [b"I'm not writable"], 0, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, [buf, object()], 0, 0) self.assertRaises(ValueError, self.serv_sock.recvmsg_into, [buf], -1, 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, [buf], object(), 0) self.assertRaises(TypeError, self.serv_sock.recvmsg_into, [buf], 0, object()) nbytes, ancdata, flags, addr = self.serv_sock.recvmsg_into([buf], 0, 0) self.assertEqual(nbytes, len(MSG)) self.assertEqual(buf, bytearray(MSG)) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgIntoBadArgs(self): self.sendToServer(MSG) def testRecvmsgIntoGenerator(self): # Receive into buffer obtained from a generator (not a sequence). buf = bytearray(len(MSG)) nbytes, ancdata, flags, addr = self.serv_sock.recvmsg_into( (o for o in [buf])) self.assertEqual(nbytes, len(MSG)) self.assertEqual(buf, bytearray(MSG)) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgIntoGenerator(self): self.sendToServer(MSG) def testRecvmsgIntoArray(self): # Receive into an array rather than the usual bytearray. buf = array.array("B", [0] * len(MSG)) nbytes, ancdata, flags, addr = self.serv_sock.recvmsg_into([buf]) self.assertEqual(nbytes, len(MSG)) self.assertEqual(buf.tobytes(), MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgIntoArray(self): self.sendToServer(MSG) def testRecvmsgIntoScatter(self): # Receive into multiple buffers (scatter write). b1 = bytearray(b"----") b2 = bytearray(b"0123456789") b3 = bytearray(b"--------------") nbytes, ancdata, flags, addr = self.serv_sock.recvmsg_into( [b1, memoryview(b2)[2:9], b3]) self.assertEqual(nbytes, len(b"Mary had a little lamb")) self.assertEqual(b1, bytearray(b"Mary")) self.assertEqual(b2, bytearray(b"01 had a 9")) self.assertEqual(b3, bytearray(b"little lamb---")) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True) def _testRecvmsgIntoScatter(self): self.sendToServer(b"Mary had a little lamb") class CmsgMacroTests(unittest.TestCase): # Test the functions CMSG_LEN() and CMSG_SPACE(). Tests # assumptions used by sendmsg() and recvmsg[_into](), which share # code with these functions. # Match the definition in socketmodule.c socklen_t_limit = min(0x7fffffff, _testcapi.INT_MAX) @requireAttrs(socket, "CMSG_LEN") def testCMSG_LEN(self): # Test CMSG_LEN() with various valid and invalid values, # checking the assumptions used by recvmsg() and sendmsg(). toobig = self.socklen_t_limit - socket.CMSG_LEN(0) + 1 values = list(range(257)) + list(range(toobig - 257, toobig)) # struct cmsghdr has at least three members, two of which are ints self.assertGreater(socket.CMSG_LEN(0), array.array("i").itemsize * 2) for n in values: ret = socket.CMSG_LEN(n) # This is how recvmsg() calculates the data size self.assertEqual(ret - socket.CMSG_LEN(0), n) self.assertLessEqual(ret, self.socklen_t_limit) self.assertRaises(OverflowError, socket.CMSG_LEN, -1) # sendmsg() shares code with these functions, and requires # that it reject values over the limit. self.assertRaises(OverflowError, socket.CMSG_LEN, toobig) self.assertRaises(OverflowError, socket.CMSG_LEN, sys.maxsize) @requireAttrs(socket, "CMSG_SPACE") def testCMSG_SPACE(self): # Test CMSG_SPACE() with various valid and invalid values, # checking the assumptions used by sendmsg(). toobig = self.socklen_t_limit - socket.CMSG_SPACE(1) + 1 values = list(range(257)) + list(range(toobig - 257, toobig)) last = socket.CMSG_SPACE(0) # struct cmsghdr has at least three members, two of which are ints self.assertGreater(last, array.array("i").itemsize * 2) for n in values: ret = socket.CMSG_SPACE(n) self.assertGreaterEqual(ret, last) self.assertGreaterEqual(ret, socket.CMSG_LEN(n)) self.assertGreaterEqual(ret, n + socket.CMSG_LEN(0)) self.assertLessEqual(ret, self.socklen_t_limit) last = ret self.assertRaises(OverflowError, socket.CMSG_SPACE, -1) # sendmsg() shares code with these functions, and requires # that it reject values over the limit. self.assertRaises(OverflowError, socket.CMSG_SPACE, toobig) self.assertRaises(OverflowError, socket.CMSG_SPACE, sys.maxsize) class SCMRightsTest(SendrecvmsgServerTimeoutBase): # Tests for file descriptor passing on Unix-domain sockets. # Invalid file descriptor value that's unlikely to evaluate to a # real FD even if one of its bytes is replaced with a different # value (which shouldn't actually happen). badfd = -0x5555 def newFDs(self, n): # Return a list of n file descriptors for newly-created files # containing their list indices as ASCII numbers. fds = [] for i in range(n): fd, path = tempfile.mkstemp() self.addCleanup(os.unlink, path) self.addCleanup(os.close, fd) os.write(fd, str(i).encode()) fds.append(fd) return fds def checkFDs(self, fds): # Check that the file descriptors in the given list contain # their correct list indices as ASCII numbers. for n, fd in enumerate(fds): os.lseek(fd, 0, os.SEEK_SET) self.assertEqual(os.read(fd, 1024), str(n).encode()) def registerRecvmsgResult(self, result): self.addCleanup(self.closeRecvmsgFDs, result) def closeRecvmsgFDs(self, recvmsg_result): # Close all file descriptors specified in the ancillary data # of the given return value from recvmsg() or recvmsg_into(). for cmsg_level, cmsg_type, cmsg_data in recvmsg_result[1]: if (cmsg_level == socket.SOL_SOCKET and cmsg_type == socket.SCM_RIGHTS): fds = array.array("i") fds.frombytes(cmsg_data[: len(cmsg_data) - (len(cmsg_data) % fds.itemsize)]) for fd in fds: os.close(fd) def createAndSendFDs(self, n): # Send n new file descriptors created by newFDs() to the # server, with the constant MSG as the non-ancillary data. self.assertEqual( self.sendmsgToServer([MSG], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", self.newFDs(n)))]), len(MSG)) def checkRecvmsgFDs(self, numfds, result, maxcmsgs=1, ignoreflags=0): # Check that constant MSG was received with numfds file # descriptors in a maximum of maxcmsgs control messages (which # must contain only complete integers). By default, check # that MSG_CTRUNC is unset, but ignore any flags in # ignoreflags. msg, ancdata, flags, addr = result self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkunset=socket.MSG_CTRUNC, ignore=ignoreflags) self.assertIsInstance(ancdata, list) self.assertLessEqual(len(ancdata), maxcmsgs) fds = array.array("i") for item in ancdata: self.assertIsInstance(item, tuple) cmsg_level, cmsg_type, cmsg_data = item self.assertEqual(cmsg_level, socket.SOL_SOCKET) self.assertEqual(cmsg_type, socket.SCM_RIGHTS) self.assertIsInstance(cmsg_data, bytes) self.assertEqual(len(cmsg_data) % SIZEOF_INT, 0) fds.frombytes(cmsg_data) self.assertEqual(len(fds), numfds) self.checkFDs(fds) def testFDPassSimple(self): # Pass a single FD (array read from bytes object). self.checkRecvmsgFDs(1, self.doRecvmsg(self.serv_sock, len(MSG), 10240)) def _testFDPassSimple(self): self.assertEqual( self.sendmsgToServer( [MSG], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", self.newFDs(1)).tobytes())]), len(MSG)) def testMultipleFDPass(self): # Pass multiple FDs in a single array. self.checkRecvmsgFDs(4, self.doRecvmsg(self.serv_sock, len(MSG), 10240)) def _testMultipleFDPass(self): self.createAndSendFDs(4) @requireAttrs(socket, "CMSG_SPACE") def testFDPassCMSG_SPACE(self): # Test using CMSG_SPACE() to calculate ancillary buffer size. self.checkRecvmsgFDs( 4, self.doRecvmsg(self.serv_sock, len(MSG), socket.CMSG_SPACE(4 * SIZEOF_INT))) @testFDPassCMSG_SPACE.client_skip def _testFDPassCMSG_SPACE(self): self.createAndSendFDs(4) def testFDPassCMSG_LEN(self): # Test using CMSG_LEN() to calculate ancillary buffer size. self.checkRecvmsgFDs(1, self.doRecvmsg(self.serv_sock, len(MSG), socket.CMSG_LEN(4 * SIZEOF_INT)), # RFC 3542 says implementations may set # MSG_CTRUNC if there isn't enough space # for trailing padding. ignoreflags=socket.MSG_CTRUNC) def _testFDPassCMSG_LEN(self): self.createAndSendFDs(1) @unittest.skipIf(sys.platform == "darwin", "skipping, see issue #12958") @requireAttrs(socket, "CMSG_SPACE") def testFDPassSeparate(self): # Pass two FDs in two separate arrays. Arrays may be combined # into a single control message by the OS. self.checkRecvmsgFDs(2, self.doRecvmsg(self.serv_sock, len(MSG), 10240), maxcmsgs=2) @testFDPassSeparate.client_skip @unittest.skipIf(sys.platform == "darwin", "skipping, see issue #12958") def _testFDPassSeparate(self): fd0, fd1 = self.newFDs(2) self.assertEqual( self.sendmsgToServer([MSG], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd0])), (socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd1]))]), len(MSG)) @unittest.skipIf(sys.platform == "darwin", "skipping, see issue #12958") @requireAttrs(socket, "CMSG_SPACE") def testFDPassSeparateMinSpace(self): # Pass two FDs in two separate arrays, receiving them into the # minimum space for two arrays. self.checkRecvmsgFDs(2, self.doRecvmsg(self.serv_sock, len(MSG), socket.CMSG_SPACE(SIZEOF_INT) + socket.CMSG_LEN(SIZEOF_INT)), maxcmsgs=2, ignoreflags=socket.MSG_CTRUNC) @testFDPassSeparateMinSpace.client_skip @unittest.skipIf(sys.platform == "darwin", "skipping, see issue #12958") def _testFDPassSeparateMinSpace(self): fd0, fd1 = self.newFDs(2) self.assertEqual( self.sendmsgToServer([MSG], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd0])), (socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd1]))]), len(MSG)) def sendAncillaryIfPossible(self, msg, ancdata): # Try to send msg and ancdata to server, but if the system # call fails, just send msg with no ancillary data. try: nbytes = self.sendmsgToServer([msg], ancdata) except socket.error as e: # Check that it was the system call that failed self.assertIsInstance(e.errno, int) nbytes = self.sendmsgToServer([msg]) self.assertEqual(nbytes, len(msg)) def testFDPassEmpty(self): # Try to pass an empty FD array. Can receive either no array # or an empty array. self.checkRecvmsgFDs(0, self.doRecvmsg(self.serv_sock, len(MSG), 10240), ignoreflags=socket.MSG_CTRUNC) def _testFDPassEmpty(self): self.sendAncillaryIfPossible(MSG, [(socket.SOL_SOCKET, socket.SCM_RIGHTS, b"")]) def testFDPassPartialInt(self): # Try to pass a truncated FD array. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 10240) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, ignore=socket.MSG_CTRUNC) self.assertLessEqual(len(ancdata), 1) for cmsg_level, cmsg_type, cmsg_data in ancdata: self.assertEqual(cmsg_level, socket.SOL_SOCKET) self.assertEqual(cmsg_type, socket.SCM_RIGHTS) self.assertLess(len(cmsg_data), SIZEOF_INT) def _testFDPassPartialInt(self): self.sendAncillaryIfPossible( MSG, [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [self.badfd]).tobytes()[:-1])]) @requireAttrs(socket, "CMSG_SPACE") def testFDPassPartialIntInMiddle(self): # Try to pass two FD arrays, the first of which is truncated. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), 10240) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, ignore=socket.MSG_CTRUNC) self.assertLessEqual(len(ancdata), 2) fds = array.array("i") # Arrays may have been combined in a single control message for cmsg_level, cmsg_type, cmsg_data in ancdata: self.assertEqual(cmsg_level, socket.SOL_SOCKET) self.assertEqual(cmsg_type, socket.SCM_RIGHTS) fds.frombytes(cmsg_data[: len(cmsg_data) - (len(cmsg_data) % fds.itemsize)]) self.assertLessEqual(len(fds), 2) self.checkFDs(fds) @testFDPassPartialIntInMiddle.client_skip def _testFDPassPartialIntInMiddle(self): fd0, fd1 = self.newFDs(2) self.sendAncillaryIfPossible( MSG, [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd0, self.badfd]).tobytes()[:-1]), (socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", [fd1]))]) def checkTruncatedHeader(self, result, ignoreflags=0): # Check that no ancillary data items are returned when data is # truncated inside the cmsghdr structure. msg, ancdata, flags, addr = result self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC, ignore=ignoreflags) def testCmsgTruncNoBufSize(self): # Check that no ancillary data is received when no buffer size # is specified. self.checkTruncatedHeader(self.doRecvmsg(self.serv_sock, len(MSG)), # BSD seems to set MSG_CTRUNC only # if an item has been partially # received. ignoreflags=socket.MSG_CTRUNC) def _testCmsgTruncNoBufSize(self): self.createAndSendFDs(1) def testCmsgTrunc0(self): # Check that no ancillary data is received when buffer size is 0. self.checkTruncatedHeader(self.doRecvmsg(self.serv_sock, len(MSG), 0), ignoreflags=socket.MSG_CTRUNC) def _testCmsgTrunc0(self): self.createAndSendFDs(1) # Check that no ancillary data is returned for various non-zero # (but still too small) buffer sizes. def testCmsgTrunc1(self): self.checkTruncatedHeader(self.doRecvmsg(self.serv_sock, len(MSG), 1)) def _testCmsgTrunc1(self): self.createAndSendFDs(1) def testCmsgTrunc2Int(self): # The cmsghdr structure has at least three members, two of # which are ints, so we still shouldn't see any ancillary # data. self.checkTruncatedHeader(self.doRecvmsg(self.serv_sock, len(MSG), SIZEOF_INT * 2)) def _testCmsgTrunc2Int(self): self.createAndSendFDs(1) def testCmsgTruncLen0Minus1(self): self.checkTruncatedHeader(self.doRecvmsg(self.serv_sock, len(MSG), socket.CMSG_LEN(0) - 1)) def _testCmsgTruncLen0Minus1(self): self.createAndSendFDs(1) # The following tests try to truncate the control message in the # middle of the FD array. def checkTruncatedArray(self, ancbuf, maxdata, mindata=0): # Check that file descriptor data is truncated to between # mindata and maxdata bytes when received with buffer size # ancbuf, and that any complete file descriptor numbers are # valid. msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), ancbuf) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC) if mindata == 0 and ancdata == []: return self.assertEqual(len(ancdata), 1) cmsg_level, cmsg_type, cmsg_data = ancdata[0] self.assertEqual(cmsg_level, socket.SOL_SOCKET) self.assertEqual(cmsg_type, socket.SCM_RIGHTS) self.assertGreaterEqual(len(cmsg_data), mindata) self.assertLessEqual(len(cmsg_data), maxdata) fds = array.array("i") fds.frombytes(cmsg_data[: len(cmsg_data) - (len(cmsg_data) % fds.itemsize)]) self.checkFDs(fds) def testCmsgTruncLen0(self): self.checkTruncatedArray(ancbuf=socket.CMSG_LEN(0), maxdata=0) def _testCmsgTruncLen0(self): self.createAndSendFDs(1) def testCmsgTruncLen0Plus1(self): self.checkTruncatedArray(ancbuf=socket.CMSG_LEN(0) + 1, maxdata=1) def _testCmsgTruncLen0Plus1(self): self.createAndSendFDs(2) def testCmsgTruncLen1(self): self.checkTruncatedArray(ancbuf=socket.CMSG_LEN(SIZEOF_INT), maxdata=SIZEOF_INT) def _testCmsgTruncLen1(self): self.createAndSendFDs(2) def testCmsgTruncLen2Minus1(self): self.checkTruncatedArray(ancbuf=socket.CMSG_LEN(2 * SIZEOF_INT) - 1, maxdata=(2 * SIZEOF_INT) - 1) def _testCmsgTruncLen2Minus1(self): self.createAndSendFDs(2) class RFC3542AncillaryTest(SendrecvmsgServerTimeoutBase): # Test sendmsg() and recvmsg[_into]() using the ancillary data # features of the RFC 3542 Advanced Sockets API for IPv6. # Currently we can only handle certain data items (e.g. traffic # class, hop limit, MTU discovery and fragmentation settings) # without resorting to unportable means such as the struct module, # but the tests here are aimed at testing the ancillary data # handling in sendmsg() and recvmsg() rather than the IPv6 API # itself. # Test value to use when setting hop limit of packet hop_limit = 2 # Test value to use when setting traffic class of packet. # -1 means "use kernel default". traffic_class = -1 def ancillaryMapping(self, ancdata): # Given ancillary data list ancdata, return a mapping from # pairs (cmsg_level, cmsg_type) to corresponding cmsg_data. # Check that no (level, type) pair appears more than once. d = {} for cmsg_level, cmsg_type, cmsg_data in ancdata: self.assertNotIn((cmsg_level, cmsg_type), d) d[(cmsg_level, cmsg_type)] = cmsg_data return d def checkHopLimit(self, ancbufsize, maxhop=255, ignoreflags=0): # Receive hop limit into ancbufsize bytes of ancillary data # space. Check that data is MSG, ancillary data is not # truncated (but ignore any flags in ignoreflags), and hop # limit is between 0 and maxhop inclusive. self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.misc_event.set() msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), ancbufsize) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkunset=socket.MSG_CTRUNC, ignore=ignoreflags) self.assertEqual(len(ancdata), 1) self.assertIsInstance(ancdata[0], tuple) cmsg_level, cmsg_type, cmsg_data = ancdata[0] self.assertEqual(cmsg_level, socket.IPPROTO_IPV6) self.assertEqual(cmsg_type, socket.IPV6_HOPLIMIT) self.assertIsInstance(cmsg_data, bytes) self.assertEqual(len(cmsg_data), SIZEOF_INT) a = array.array("i") a.frombytes(cmsg_data) self.assertGreaterEqual(a[0], 0) self.assertLessEqual(a[0], maxhop) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testRecvHopLimit(self): # Test receiving the packet hop limit as ancillary data. self.checkHopLimit(ancbufsize=10240) @testRecvHopLimit.client_skip def _testRecvHopLimit(self): # Need to wait until server has asked to receive ancillary # data, as implementations are not required to buffer it # otherwise. self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testRecvHopLimitCMSG_SPACE(self): # Test receiving hop limit, using CMSG_SPACE to calculate buffer size. self.checkHopLimit(ancbufsize=socket.CMSG_SPACE(SIZEOF_INT)) @testRecvHopLimitCMSG_SPACE.client_skip def _testRecvHopLimitCMSG_SPACE(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) # Could test receiving into buffer sized using CMSG_LEN, but RFC # 3542 says portable applications must provide space for trailing # padding. Implementations may set MSG_CTRUNC if there isn't # enough space for the padding. @requireAttrs(socket.socket, "sendmsg") @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSetHopLimit(self): # Test setting hop limit on outgoing packet and receiving it # at the other end. self.checkHopLimit(ancbufsize=10240, maxhop=self.hop_limit) @testSetHopLimit.client_skip def _testSetHopLimit(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.assertEqual( self.sendmsgToServer([MSG], [(socket.IPPROTO_IPV6, socket.IPV6_HOPLIMIT, array.array("i", [self.hop_limit]))]), len(MSG)) def checkTrafficClassAndHopLimit(self, ancbufsize, maxhop=255, ignoreflags=0): # Receive traffic class and hop limit into ancbufsize bytes of # ancillary data space. Check that data is MSG, ancillary # data is not truncated (but ignore any flags in ignoreflags), # and traffic class and hop limit are in range (hop limit no # more than maxhop). self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVTCLASS, 1) self.misc_event.set() msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), ancbufsize) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkunset=socket.MSG_CTRUNC, ignore=ignoreflags) self.assertEqual(len(ancdata), 2) ancmap = self.ancillaryMapping(ancdata) tcdata = ancmap[(socket.IPPROTO_IPV6, socket.IPV6_TCLASS)] self.assertEqual(len(tcdata), SIZEOF_INT) a = array.array("i") a.frombytes(tcdata) self.assertGreaterEqual(a[0], 0) self.assertLessEqual(a[0], 255) hldata = ancmap[(socket.IPPROTO_IPV6, socket.IPV6_HOPLIMIT)] self.assertEqual(len(hldata), SIZEOF_INT) a = array.array("i") a.frombytes(hldata) self.assertGreaterEqual(a[0], 0) self.assertLessEqual(a[0], maxhop) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testRecvTrafficClassAndHopLimit(self): # Test receiving traffic class and hop limit as ancillary data. self.checkTrafficClassAndHopLimit(ancbufsize=10240) @testRecvTrafficClassAndHopLimit.client_skip def _testRecvTrafficClassAndHopLimit(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testRecvTrafficClassAndHopLimitCMSG_SPACE(self): # Test receiving traffic class and hop limit, using # CMSG_SPACE() to calculate buffer size. self.checkTrafficClassAndHopLimit( ancbufsize=socket.CMSG_SPACE(SIZEOF_INT) * 2) @testRecvTrafficClassAndHopLimitCMSG_SPACE.client_skip def _testRecvTrafficClassAndHopLimitCMSG_SPACE(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket.socket, "sendmsg") @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSetTrafficClassAndHopLimit(self): # Test setting traffic class and hop limit on outgoing packet, # and receiving them at the other end. self.checkTrafficClassAndHopLimit(ancbufsize=10240, maxhop=self.hop_limit) @testSetTrafficClassAndHopLimit.client_skip def _testSetTrafficClassAndHopLimit(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.assertEqual( self.sendmsgToServer([MSG], [(socket.IPPROTO_IPV6, socket.IPV6_TCLASS, array.array("i", [self.traffic_class])), (socket.IPPROTO_IPV6, socket.IPV6_HOPLIMIT, array.array("i", [self.hop_limit]))]), len(MSG)) @requireAttrs(socket.socket, "sendmsg") @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testOddCmsgSize(self): # Try to send ancillary data with first item one byte too # long. Fall back to sending with correct size if this fails, # and check that second item was handled correctly. self.checkTrafficClassAndHopLimit(ancbufsize=10240, maxhop=self.hop_limit) @testOddCmsgSize.client_skip def _testOddCmsgSize(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) try: nbytes = self.sendmsgToServer( [MSG], [(socket.IPPROTO_IPV6, socket.IPV6_TCLASS, array.array("i", [self.traffic_class]).tobytes() + b"\x00"), (socket.IPPROTO_IPV6, socket.IPV6_HOPLIMIT, array.array("i", [self.hop_limit]))]) except socket.error as e: self.assertIsInstance(e.errno, int) nbytes = self.sendmsgToServer( [MSG], [(socket.IPPROTO_IPV6, socket.IPV6_TCLASS, array.array("i", [self.traffic_class])), (socket.IPPROTO_IPV6, socket.IPV6_HOPLIMIT, array.array("i", [self.hop_limit]))]) self.assertEqual(nbytes, len(MSG)) # Tests for proper handling of truncated ancillary data def checkHopLimitTruncatedHeader(self, ancbufsize, ignoreflags=0): # Receive hop limit into ancbufsize bytes of ancillary data # space, which should be too small to contain the ancillary # data header (if ancbufsize is None, pass no second argument # to recvmsg()). Check that data is MSG, MSG_CTRUNC is set # (unless included in ignoreflags), and no ancillary data is # returned. self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.misc_event.set() args = () if ancbufsize is None else (ancbufsize,) msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), *args) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.assertEqual(ancdata, []) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC, ignore=ignoreflags) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testCmsgTruncNoBufSize(self): # Check that no ancillary data is received when no ancillary # buffer size is provided. self.checkHopLimitTruncatedHeader(ancbufsize=None, # BSD seems to set # MSG_CTRUNC only if an item # has been partially # received. ignoreflags=socket.MSG_CTRUNC) @testCmsgTruncNoBufSize.client_skip def _testCmsgTruncNoBufSize(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSingleCmsgTrunc0(self): # Check that no ancillary data is received when ancillary # buffer size is zero. self.checkHopLimitTruncatedHeader(ancbufsize=0, ignoreflags=socket.MSG_CTRUNC) @testSingleCmsgTrunc0.client_skip def _testSingleCmsgTrunc0(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) # Check that no ancillary data is returned for various non-zero # (but still too small) buffer sizes. @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSingleCmsgTrunc1(self): self.checkHopLimitTruncatedHeader(ancbufsize=1) @testSingleCmsgTrunc1.client_skip def _testSingleCmsgTrunc1(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSingleCmsgTrunc2Int(self): self.checkHopLimitTruncatedHeader(ancbufsize=2 * SIZEOF_INT) @testSingleCmsgTrunc2Int.client_skip def _testSingleCmsgTrunc2Int(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSingleCmsgTruncLen0Minus1(self): self.checkHopLimitTruncatedHeader(ancbufsize=socket.CMSG_LEN(0) - 1) @testSingleCmsgTruncLen0Minus1.client_skip def _testSingleCmsgTruncLen0Minus1(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT") def testSingleCmsgTruncInData(self): # Test truncation of a control message inside its associated # data. The message may be returned with its data truncated, # or not returned at all. self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.misc_event.set() msg, ancdata, flags, addr = self.doRecvmsg( self.serv_sock, len(MSG), socket.CMSG_LEN(SIZEOF_INT) - 1) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC) self.assertLessEqual(len(ancdata), 1) if ancdata: cmsg_level, cmsg_type, cmsg_data = ancdata[0] self.assertEqual(cmsg_level, socket.IPPROTO_IPV6) self.assertEqual(cmsg_type, socket.IPV6_HOPLIMIT) self.assertLess(len(cmsg_data), SIZEOF_INT) @testSingleCmsgTruncInData.client_skip def _testSingleCmsgTruncInData(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) def checkTruncatedSecondHeader(self, ancbufsize, ignoreflags=0): # Receive traffic class and hop limit into ancbufsize bytes of # ancillary data space, which should be large enough to # contain the first item, but too small to contain the header # of the second. Check that data is MSG, MSG_CTRUNC is set # (unless included in ignoreflags), and only one ancillary # data item is returned. self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVTCLASS, 1) self.misc_event.set() msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG), ancbufsize) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC, ignore=ignoreflags) self.assertEqual(len(ancdata), 1) cmsg_level, cmsg_type, cmsg_data = ancdata[0] self.assertEqual(cmsg_level, socket.IPPROTO_IPV6) self.assertIn(cmsg_type, {socket.IPV6_TCLASS, socket.IPV6_HOPLIMIT}) self.assertEqual(len(cmsg_data), SIZEOF_INT) a = array.array("i") a.frombytes(cmsg_data) self.assertGreaterEqual(a[0], 0) self.assertLessEqual(a[0], 255) # Try the above test with various buffer sizes. @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSecondCmsgTrunc0(self): self.checkTruncatedSecondHeader(socket.CMSG_SPACE(SIZEOF_INT), ignoreflags=socket.MSG_CTRUNC) @testSecondCmsgTrunc0.client_skip def _testSecondCmsgTrunc0(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSecondCmsgTrunc1(self): self.checkTruncatedSecondHeader(socket.CMSG_SPACE(SIZEOF_INT) + 1) @testSecondCmsgTrunc1.client_skip def _testSecondCmsgTrunc1(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSecondCmsgTrunc2Int(self): self.checkTruncatedSecondHeader(socket.CMSG_SPACE(SIZEOF_INT) + 2 * SIZEOF_INT) @testSecondCmsgTrunc2Int.client_skip def _testSecondCmsgTrunc2Int(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSecondCmsgTruncLen0Minus1(self): self.checkTruncatedSecondHeader(socket.CMSG_SPACE(SIZEOF_INT) + socket.CMSG_LEN(0) - 1) @testSecondCmsgTruncLen0Minus1.client_skip def _testSecondCmsgTruncLen0Minus1(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) @requireAttrs(socket, "CMSG_SPACE", "IPV6_RECVHOPLIMIT", "IPV6_HOPLIMIT", "IPV6_RECVTCLASS", "IPV6_TCLASS") def testSecomdCmsgTruncInData(self): # Test truncation of the second of two control messages inside # its associated data. self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVHOPLIMIT, 1) self.serv_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_RECVTCLASS, 1) self.misc_event.set() msg, ancdata, flags, addr = self.doRecvmsg( self.serv_sock, len(MSG), socket.CMSG_SPACE(SIZEOF_INT) + socket.CMSG_LEN(SIZEOF_INT) - 1) self.assertEqual(msg, MSG) self.checkRecvmsgAddress(addr, self.cli_addr) self.checkFlags(flags, eor=True, checkset=socket.MSG_CTRUNC) cmsg_types = {socket.IPV6_TCLASS, socket.IPV6_HOPLIMIT} cmsg_level, cmsg_type, cmsg_data = ancdata.pop(0) self.assertEqual(cmsg_level, socket.IPPROTO_IPV6) cmsg_types.remove(cmsg_type) self.assertEqual(len(cmsg_data), SIZEOF_INT) a = array.array("i") a.frombytes(cmsg_data) self.assertGreaterEqual(a[0], 0) self.assertLessEqual(a[0], 255) if ancdata: cmsg_level, cmsg_type, cmsg_data = ancdata.pop(0) self.assertEqual(cmsg_level, socket.IPPROTO_IPV6) cmsg_types.remove(cmsg_type) self.assertLess(len(cmsg_data), SIZEOF_INT) self.assertEqual(ancdata, []) @testSecomdCmsgTruncInData.client_skip def _testSecomdCmsgTruncInData(self): self.assertTrue(self.misc_event.wait(timeout=self.fail_timeout)) self.sendToServer(MSG) # Derive concrete test classes for different socket types. class SendrecvmsgUDPTestBase(SendrecvmsgDgramFlagsBase, SendrecvmsgConnectionlessBase, ThreadedSocketTestMixin, UDPTestBase): pass @requireAttrs(socket.socket, "sendmsg") @unittest.skipUnless(thread, 'Threading required for this test.') class SendmsgUDPTest(SendmsgConnectionlessTests, SendrecvmsgUDPTestBase): pass @requireAttrs(socket.socket, "recvmsg") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgUDPTest(RecvmsgTests, SendrecvmsgUDPTestBase): pass @requireAttrs(socket.socket, "recvmsg_into") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoUDPTest(RecvmsgIntoTests, SendrecvmsgUDPTestBase): pass class SendrecvmsgUDP6TestBase(SendrecvmsgDgramFlagsBase, SendrecvmsgConnectionlessBase, ThreadedSocketTestMixin, UDP6TestBase): def checkRecvmsgAddress(self, addr1, addr2): # Called to compare the received address with the address of # the peer, ignoring scope ID self.assertEqual(addr1[:-1], addr2[:-1]) @requireAttrs(socket.socket, "sendmsg") @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') @requireSocket("AF_INET6", "SOCK_DGRAM") @unittest.skipUnless(thread, 'Threading required for this test.') class SendmsgUDP6Test(SendmsgConnectionlessTests, SendrecvmsgUDP6TestBase): pass @requireAttrs(socket.socket, "recvmsg") @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') @requireSocket("AF_INET6", "SOCK_DGRAM") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgUDP6Test(RecvmsgTests, SendrecvmsgUDP6TestBase): pass @requireAttrs(socket.socket, "recvmsg_into") @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') @requireSocket("AF_INET6", "SOCK_DGRAM") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoUDP6Test(RecvmsgIntoTests, SendrecvmsgUDP6TestBase): pass @requireAttrs(socket.socket, "recvmsg") @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') @requireAttrs(socket, "IPPROTO_IPV6") @requireSocket("AF_INET6", "SOCK_DGRAM") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgRFC3542AncillaryUDP6Test(RFC3542AncillaryTest, SendrecvmsgUDP6TestBase): pass @requireAttrs(socket.socket, "recvmsg_into") @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.') @requireAttrs(socket, "IPPROTO_IPV6") @requireSocket("AF_INET6", "SOCK_DGRAM") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoRFC3542AncillaryUDP6Test(RecvmsgIntoMixin, RFC3542AncillaryTest, SendrecvmsgUDP6TestBase): pass class SendrecvmsgTCPTestBase(SendrecvmsgConnectedBase, ConnectedStreamTestMixin, TCPTestBase): pass @requireAttrs(socket.socket, "sendmsg") @unittest.skipUnless(thread, 'Threading required for this test.') class SendmsgTCPTest(SendmsgStreamTests, SendrecvmsgTCPTestBase): pass @requireAttrs(socket.socket, "recvmsg") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgTCPTest(RecvmsgTests, RecvmsgGenericStreamTests, SendrecvmsgTCPTestBase): pass @requireAttrs(socket.socket, "recvmsg_into") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoTCPTest(RecvmsgIntoTests, RecvmsgGenericStreamTests, SendrecvmsgTCPTestBase): pass class SendrecvmsgSCTPStreamTestBase(SendrecvmsgSCTPFlagsBase, SendrecvmsgConnectedBase, ConnectedStreamTestMixin, SCTPStreamBase): pass @requireAttrs(socket.socket, "sendmsg") @requireSocket("AF_INET", "SOCK_STREAM", "IPPROTO_SCTP") @unittest.skipUnless(thread, 'Threading required for this test.') class SendmsgSCTPStreamTest(SendmsgStreamTests, SendrecvmsgSCTPStreamTestBase): pass @requireAttrs(socket.socket, "recvmsg") @requireSocket("AF_INET", "SOCK_STREAM", "IPPROTO_SCTP") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgSCTPStreamTest(RecvmsgTests, RecvmsgGenericStreamTests, SendrecvmsgSCTPStreamTestBase): def testRecvmsgEOF(self): try: super(RecvmsgSCTPStreamTest, self).testRecvmsgEOF() except OSError as e: if e.errno != errno.ENOTCONN: raise self.skipTest("sporadic ENOTCONN (kernel issue?) - see issue #13876") @requireAttrs(socket.socket, "recvmsg_into") @requireSocket("AF_INET", "SOCK_STREAM", "IPPROTO_SCTP") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoSCTPStreamTest(RecvmsgIntoTests, RecvmsgGenericStreamTests, SendrecvmsgSCTPStreamTestBase): def testRecvmsgEOF(self): try: super(RecvmsgIntoSCTPStreamTest, self).testRecvmsgEOF() except OSError as e: if e.errno != errno.ENOTCONN: raise self.skipTest("sporadic ENOTCONN (kernel issue?) - see issue #13876") class SendrecvmsgUnixStreamTestBase(SendrecvmsgConnectedBase, ConnectedStreamTestMixin, UnixStreamBase): pass @requireAttrs(socket.socket, "sendmsg") @requireAttrs(socket, "AF_UNIX") @unittest.skipUnless(thread, 'Threading required for this test.') class SendmsgUnixStreamTest(SendmsgStreamTests, SendrecvmsgUnixStreamTestBase): pass @requireAttrs(socket.socket, "recvmsg") @requireAttrs(socket, "AF_UNIX") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgUnixStreamTest(RecvmsgTests, RecvmsgGenericStreamTests, SendrecvmsgUnixStreamTestBase): pass @requireAttrs(socket.socket, "recvmsg_into") @requireAttrs(socket, "AF_UNIX") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoUnixStreamTest(RecvmsgIntoTests, RecvmsgGenericStreamTests, SendrecvmsgUnixStreamTestBase): pass @requireAttrs(socket.socket, "sendmsg", "recvmsg") @requireAttrs(socket, "AF_UNIX", "SOL_SOCKET", "SCM_RIGHTS") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgSCMRightsStreamTest(SCMRightsTest, SendrecvmsgUnixStreamTestBase): pass @requireAttrs(socket.socket, "sendmsg", "recvmsg_into") @requireAttrs(socket, "AF_UNIX", "SOL_SOCKET", "SCM_RIGHTS") @unittest.skipUnless(thread, 'Threading required for this test.') class RecvmsgIntoSCMRightsStreamTest(RecvmsgIntoMixin, SCMRightsTest, SendrecvmsgUnixStreamTestBase): pass # Test interrupting the interruptible send/receive methods with a # signal when a timeout is set. These tests avoid having multiple # threads alive during the test so that the OS cannot deliver the # signal to the wrong one. class InterruptedTimeoutBase(unittest.TestCase): # Base class for interrupted send/receive tests. Installs an # empty handler for SIGALRM and removes it on teardown, along with # any scheduled alarms. def setUp(self): super().setUp() orig_alrm_handler = signal.signal(signal.SIGALRM, lambda signum, frame: None) self.addCleanup(signal.signal, signal.SIGALRM, orig_alrm_handler) self.addCleanup(self.setAlarm, 0) # Timeout for socket operations timeout = 4.0 # Provide setAlarm() method to schedule delivery of SIGALRM after # given number of seconds, or cancel it if zero, and an # appropriate time value to use. Use setitimer() if available. if hasattr(signal, "setitimer"): alarm_time = 0.05 def setAlarm(self, seconds): signal.setitimer(signal.ITIMER_REAL, seconds) else: # Old systems may deliver the alarm up to one second early alarm_time = 2 def setAlarm(self, seconds): signal.alarm(seconds) # Require siginterrupt() in order to ensure that system calls are # interrupted by default. @requireAttrs(signal, "siginterrupt") @unittest.skipUnless(hasattr(signal, "alarm") or hasattr(signal, "setitimer"), "Don't have signal.alarm or signal.setitimer") class InterruptedRecvTimeoutTest(InterruptedTimeoutBase, UDPTestBase): # Test interrupting the recv*() methods with signals when a # timeout is set. def setUp(self): super().setUp() self.serv.settimeout(self.timeout) def checkInterruptedRecv(self, func, *args, **kwargs): # Check that func(*args, **kwargs) raises socket.error with an # errno of EINTR when interrupted by a signal. self.setAlarm(self.alarm_time) with self.assertRaises(socket.error) as cm: func(*args, **kwargs) self.assertNotIsInstance(cm.exception, socket.timeout) self.assertEqual(cm.exception.errno, errno.EINTR) def testInterruptedRecvTimeout(self): self.checkInterruptedRecv(self.serv.recv, 1024) def testInterruptedRecvIntoTimeout(self): self.checkInterruptedRecv(self.serv.recv_into, bytearray(1024)) def testInterruptedRecvfromTimeout(self): self.checkInterruptedRecv(self.serv.recvfrom, 1024) def testInterruptedRecvfromIntoTimeout(self): self.checkInterruptedRecv(self.serv.recvfrom_into, bytearray(1024)) @requireAttrs(socket.socket, "recvmsg") def testInterruptedRecvmsgTimeout(self): self.checkInterruptedRecv(self.serv.recvmsg, 1024) @requireAttrs(socket.socket, "recvmsg_into") def testInterruptedRecvmsgIntoTimeout(self): self.checkInterruptedRecv(self.serv.recvmsg_into, [bytearray(1024)]) # Require siginterrupt() in order to ensure that system calls are # interrupted by default. @requireAttrs(signal, "siginterrupt") @unittest.skipUnless(hasattr(signal, "alarm") or hasattr(signal, "setitimer"), "Don't have signal.alarm or signal.setitimer") @unittest.skipUnless(thread, 'Threading required for this test.') class InterruptedSendTimeoutTest(InterruptedTimeoutBase, ThreadSafeCleanupTestCase, SocketListeningTestMixin, TCPTestBase): # Test interrupting the interruptible send*() methods with signals # when a timeout is set. def setUp(self): super().setUp() self.serv_conn = self.newSocket() self.addCleanup(self.serv_conn.close) # Use a thread to complete the connection, but wait for it to # terminate before running the test, so that there is only one # thread to accept the signal. cli_thread = threading.Thread(target=self.doConnect) cli_thread.start() self.cli_conn, addr = self.serv.accept() self.addCleanup(self.cli_conn.close) cli_thread.join() self.serv_conn.settimeout(self.timeout) def doConnect(self): self.serv_conn.connect(self.serv_addr) def checkInterruptedSend(self, func, *args, **kwargs): # Check that func(*args, **kwargs), run in a loop, raises # socket.error with an errno of EINTR when interrupted by a # signal. with self.assertRaises(socket.error) as cm: while True: self.setAlarm(self.alarm_time) func(*args, **kwargs) self.assertNotIsInstance(cm.exception, socket.timeout) self.assertEqual(cm.exception.errno, errno.EINTR) # Issue #12958: The following tests have problems on Mac OS X @support.anticipate_failure(sys.platform == "darwin") def testInterruptedSendTimeout(self): self.checkInterruptedSend(self.serv_conn.send, b"a"*512) @support.anticipate_failure(sys.platform == "darwin") def testInterruptedSendtoTimeout(self): # Passing an actual address here as Python's wrapper for # sendto() doesn't allow passing a zero-length one; POSIX # requires that the address is ignored since the socket is # connection-mode, however. self.checkInterruptedSend(self.serv_conn.sendto, b"a"*512, self.serv_addr) @support.anticipate_failure(sys.platform == "darwin") @requireAttrs(socket.socket, "sendmsg") def testInterruptedSendmsgTimeout(self): self.checkInterruptedSend(self.serv_conn.sendmsg, [b"a"*512]) @unittest.skipUnless(thread, 'Threading required for this test.') class TCPCloserTest(ThreadedTCPSocketTest): def testClose(self): conn, addr = self.serv.accept() conn.close() sd = self.cli read, write, err = select.select([sd], [], [], 1.0) self.assertEqual(read, [sd]) self.assertEqual(sd.recv(1), b'') # Calling close() many times should be safe. conn.close() conn.close() def _testClose(self): self.cli.connect((HOST, self.port)) time.sleep(1.0) @unittest.skipUnless(hasattr(socket, 'socketpair'), 'test needs socket.socketpair()') @unittest.skipUnless(thread, 'Threading required for this test.') class BasicSocketPairTest(SocketPairTest): def __init__(self, methodName='runTest'): SocketPairTest.__init__(self, methodName=methodName) def _check_defaults(self, sock): self.assertIsInstance(sock, socket.socket) if hasattr(socket, 'AF_UNIX'): self.assertEqual(sock.family, socket.AF_UNIX) else: self.assertEqual(sock.family, socket.AF_INET) self.assertEqual(sock.type, socket.SOCK_STREAM) self.assertEqual(sock.proto, 0) def _testDefaults(self): self._check_defaults(self.cli) def testDefaults(self): self._check_defaults(self.serv) def testRecv(self): msg = self.serv.recv(1024) self.assertEqual(msg, MSG) def _testRecv(self): self.cli.send(MSG) def testSend(self): self.serv.send(MSG) def _testSend(self): msg = self.cli.recv(1024) self.assertEqual(msg, MSG) @unittest.skipUnless(thread, 'Threading required for this test.') class NonBlockingTCPTests(ThreadedTCPSocketTest): def __init__(self, methodName='runTest'): ThreadedTCPSocketTest.__init__(self, methodName=methodName) def testSetBlocking(self): # Testing whether set blocking works self.serv.setblocking(True) self.assertIsNone(self.serv.gettimeout()) self.serv.setblocking(False) self.assertEqual(self.serv.gettimeout(), 0.0) start = time.time() try: self.serv.accept() except socket.error: pass end = time.time() self.assertTrue((end - start) < 1.0, "Error setting non-blocking mode.") # Issue 15989 if _testcapi.UINT_MAX < _testcapi.ULONG_MAX: self.serv.setblocking(_testcapi.UINT_MAX + 1) self.assertIsNone(self.serv.gettimeout()) def _testSetBlocking(self): pass @unittest.skipUnless(hasattr(socket, 'SOCK_NONBLOCK'), 'test needs socket.SOCK_NONBLOCK') @support.requires_linux_version(2, 6, 28) def testInitNonBlocking(self): # reinit server socket self.serv.close() self.serv = socket.socket(socket.AF_INET, socket.SOCK_STREAM | socket.SOCK_NONBLOCK) self.port = support.bind_port(self.serv) self.serv.listen(1) # actual testing start = time.time() try: self.serv.accept() except socket.error: pass end = time.time() self.assertTrue((end - start) < 1.0, "Error creating with non-blocking mode.") def _testInitNonBlocking(self): pass def testInheritFlags(self): # Issue #7995: when calling accept() on a listening socket with a # timeout, the resulting socket should not be non-blocking. self.serv.settimeout(10) try: conn, addr = self.serv.accept() message = conn.recv(len(MSG)) finally: conn.close() self.serv.settimeout(None) def _testInheritFlags(self): time.sleep(0.1) self.cli.connect((HOST, self.port)) time.sleep(0.5) self.cli.send(MSG) def testAccept(self): # Testing non-blocking accept self.serv.setblocking(0) try: conn, addr = self.serv.accept() except socket.error: pass else: self.fail("Error trying to do non-blocking accept.") read, write, err = select.select([self.serv], [], []) if self.serv in read: conn, addr = self.serv.accept() conn.close() else: self.fail("Error trying to do accept after select.") def _testAccept(self): time.sleep(0.1) self.cli.connect((HOST, self.port)) def testConnect(self): # Testing non-blocking connect conn, addr = self.serv.accept() conn.close() def _testConnect(self): self.cli.settimeout(10) self.cli.connect((HOST, self.port)) def testRecv(self): # Testing non-blocking recv conn, addr = self.serv.accept() conn.setblocking(0) try: msg = conn.recv(len(MSG)) except socket.error: pass else: self.fail("Error trying to do non-blocking recv.") read, write, err = select.select([conn], [], []) if conn in read: msg = conn.recv(len(MSG)) conn.close() self.assertEqual(msg, MSG) else: self.fail("Error during select call to non-blocking socket.") def _testRecv(self): self.cli.connect((HOST, self.port)) time.sleep(0.1) self.cli.send(MSG) @unittest.skipUnless(thread, 'Threading required for this test.') class FileObjectClassTestCase(SocketConnectedTest): """Unit tests for the object returned by socket.makefile() self.read_file is the io object returned by makefile() on the client connection. You can read from this file to get output from the server. self.write_file is the io object returned by makefile() on the server connection. You can write to this file to send output to the client. """ bufsize = -1 # Use default buffer size encoding = 'utf-8' errors = 'strict' newline = None read_mode = 'rb' read_msg = MSG write_mode = 'wb' write_msg = MSG def __init__(self, methodName='runTest'): SocketConnectedTest.__init__(self, methodName=methodName) def setUp(self): self.evt1, self.evt2, self.serv_finished, self.cli_finished = [ threading.Event() for i in range(4)] SocketConnectedTest.setUp(self) self.read_file = self.cli_conn.makefile( self.read_mode, self.bufsize, encoding = self.encoding, errors = self.errors, newline = self.newline) def tearDown(self): self.serv_finished.set() self.read_file.close() self.assertTrue(self.read_file.closed) self.read_file = None SocketConnectedTest.tearDown(self) def clientSetUp(self): SocketConnectedTest.clientSetUp(self) self.write_file = self.serv_conn.makefile( self.write_mode, self.bufsize, encoding = self.encoding, errors = self.errors, newline = self.newline) def clientTearDown(self): self.cli_finished.set() self.write_file.close() self.assertTrue(self.write_file.closed) self.write_file = None SocketConnectedTest.clientTearDown(self) def testReadAfterTimeout(self): # Issue #7322: A file object must disallow further reads # after a timeout has occurred. self.cli_conn.settimeout(1) self.read_file.read(3) # First read raises a timeout self.assertRaises(socket.timeout, self.read_file.read, 1) # Second read is disallowed with self.assertRaises(IOError) as ctx: self.read_file.read(1) self.assertIn("cannot read from timed out object", str(ctx.exception)) def _testReadAfterTimeout(self): self.write_file.write(self.write_msg[0:3]) self.write_file.flush() self.serv_finished.wait() def testSmallRead(self): # Performing small file read test first_seg = self.read_file.read(len(self.read_msg)-3) second_seg = self.read_file.read(3) msg = first_seg + second_seg self.assertEqual(msg, self.read_msg) def _testSmallRead(self): self.write_file.write(self.write_msg) self.write_file.flush() def testFullRead(self): # read until EOF msg = self.read_file.read() self.assertEqual(msg, self.read_msg) def _testFullRead(self): self.write_file.write(self.write_msg) self.write_file.close() def testUnbufferedRead(self): # Performing unbuffered file read test buf = type(self.read_msg)() while 1: char = self.read_file.read(1) if not char: break buf += char self.assertEqual(buf, self.read_msg) def _testUnbufferedRead(self): self.write_file.write(self.write_msg) self.write_file.flush() def testReadline(self): # Performing file readline test line = self.read_file.readline() self.assertEqual(line, self.read_msg) def _testReadline(self): self.write_file.write(self.write_msg) self.write_file.flush() def testCloseAfterMakefile(self): # The file returned by makefile should keep the socket open. self.cli_conn.close() # read until EOF msg = self.read_file.read() self.assertEqual(msg, self.read_msg) def _testCloseAfterMakefile(self): self.write_file.write(self.write_msg) self.write_file.flush() def testMakefileAfterMakefileClose(self): self.read_file.close() msg = self.cli_conn.recv(len(MSG)) if isinstance(self.read_msg, str): msg = msg.decode() self.assertEqual(msg, self.read_msg) def _testMakefileAfterMakefileClose(self): self.write_file.write(self.write_msg) self.write_file.flush() def testClosedAttr(self): self.assertTrue(not self.read_file.closed) def _testClosedAttr(self): self.assertTrue(not self.write_file.closed) def testAttributes(self): self.assertEqual(self.read_file.mode, self.read_mode) self.assertEqual(self.read_file.name, self.cli_conn.fileno()) def _testAttributes(self): self.assertEqual(self.write_file.mode, self.write_mode) self.assertEqual(self.write_file.name, self.serv_conn.fileno()) def testRealClose(self): self.read_file.close() self.assertRaises(ValueError, self.read_file.fileno) self.cli_conn.close() self.assertRaises(socket.error, self.cli_conn.getsockname) def _testRealClose(self): pass class FileObjectInterruptedTestCase(unittest.TestCase): """Test that the file object correctly handles EINTR internally.""" class MockSocket(object): def __init__(self, recv_funcs=()): # A generator that returns callables that we'll call for each # call to recv(). self._recv_step = iter(recv_funcs) def recv_into(self, buffer): data = next(self._recv_step)() assert len(buffer) >= len(data) buffer[:len(data)] = data return len(data) def _decref_socketios(self): pass def _textiowrap_for_test(self, buffering=-1): raw = socket.SocketIO(self, "r") if buffering < 0: buffering = io.DEFAULT_BUFFER_SIZE if buffering == 0: return raw buffer = io.BufferedReader(raw, buffering) text = io.TextIOWrapper(buffer, None, None) text.mode = "rb" return text @staticmethod def _raise_eintr(): raise socket.error(errno.EINTR, "interrupted") def _textiowrap_mock_socket(self, mock, buffering=-1): raw = socket.SocketIO(mock, "r") if buffering < 0: buffering = io.DEFAULT_BUFFER_SIZE if buffering == 0: return raw buffer = io.BufferedReader(raw, buffering) text = io.TextIOWrapper(buffer, None, None) text.mode = "rb" return text def _test_readline(self, size=-1, buffering=-1): mock_sock = self.MockSocket(recv_funcs=[ lambda : b"This is the first line\nAnd the sec", self._raise_eintr, lambda : b"ond line is here\n", lambda : b"", lambda : b"", # XXX(gps): io library does an extra EOF read ]) fo = mock_sock._textiowrap_for_test(buffering=buffering) self.assertEqual(fo.readline(size), "This is the first line\n") self.assertEqual(fo.readline(size), "And the second line is here\n") def _test_read(self, size=-1, buffering=-1): mock_sock = self.MockSocket(recv_funcs=[ lambda : b"This is the first line\nAnd the sec", self._raise_eintr, lambda : b"ond line is here\n", lambda : b"", lambda : b"", # XXX(gps): io library does an extra EOF read ]) expecting = (b"This is the first line\n" b"And the second line is here\n") fo = mock_sock._textiowrap_for_test(buffering=buffering) if buffering == 0: data = b'' else: data = '' expecting = expecting.decode('utf-8') while len(data) != len(expecting): part = fo.read(size) if not part: break data += part self.assertEqual(data, expecting) def test_default(self): self._test_readline() self._test_readline(size=100) self._test_read() self._test_read(size=100) def test_with_1k_buffer(self): self._test_readline(buffering=1024) self._test_readline(size=100, buffering=1024) self._test_read(buffering=1024) self._test_read(size=100, buffering=1024) def _test_readline_no_buffer(self, size=-1): mock_sock = self.MockSocket(recv_funcs=[ lambda : b"a", lambda : b"\n", lambda : b"B", self._raise_eintr, lambda : b"b", lambda : b"", ]) fo = mock_sock._textiowrap_for_test(buffering=0) self.assertEqual(fo.readline(size), b"a\n") self.assertEqual(fo.readline(size), b"Bb") def test_no_buffer(self): self._test_readline_no_buffer() self._test_readline_no_buffer(size=4) self._test_read(buffering=0) self._test_read(size=100, buffering=0) class UnbufferedFileObjectClassTestCase(FileObjectClassTestCase): """Repeat the tests from FileObjectClassTestCase with bufsize==0. In this case (and in this case only), it should be possible to create a file object, read a line from it, create another file object, read another line from it, without loss of data in the first file object's buffer. Note that http.client relies on this when reading multiple requests from the same socket.""" bufsize = 0 # Use unbuffered mode def testUnbufferedReadline(self): # Read a line, create a new file object, read another line with it line = self.read_file.readline() # first line self.assertEqual(line, b"A. " + self.write_msg) # first line self.read_file = self.cli_conn.makefile('rb', 0) line = self.read_file.readline() # second line self.assertEqual(line, b"B. " + self.write_msg) # second line def _testUnbufferedReadline(self): self.write_file.write(b"A. " + self.write_msg) self.write_file.write(b"B. " + self.write_msg) self.write_file.flush() def testMakefileClose(self): # The file returned by makefile should keep the socket open... self.cli_conn.close() msg = self.cli_conn.recv(1024) self.assertEqual(msg, self.read_msg) # ...until the file is itself closed self.read_file.close() self.assertRaises(socket.error, self.cli_conn.recv, 1024) def _testMakefileClose(self): self.write_file.write(self.write_msg) self.write_file.flush() def testMakefileCloseSocketDestroy(self): refcount_before = sys.getrefcount(self.cli_conn) self.read_file.close() refcount_after = sys.getrefcount(self.cli_conn) self.assertEqual(refcount_before - 1, refcount_after) def _testMakefileCloseSocketDestroy(self): pass # Non-blocking ops # NOTE: to set `read_file` as non-blocking, we must call # `cli_conn.setblocking` and vice-versa (see setUp / clientSetUp). def testSmallReadNonBlocking(self): self.cli_conn.setblocking(False) self.assertEqual(self.read_file.readinto(bytearray(10)), None) self.assertEqual(self.read_file.read(len(self.read_msg) - 3), None) self.evt1.set() self.evt2.wait(1.0) first_seg = self.read_file.read(len(self.read_msg) - 3) if first_seg is None: # Data not arrived (can happen under Windows), wait a bit time.sleep(0.5) first_seg = self.read_file.read(len(self.read_msg) - 3) buf = bytearray(10) n = self.read_file.readinto(buf) self.assertEqual(n, 3) msg = first_seg + buf[:n] self.assertEqual(msg, self.read_msg) self.assertEqual(self.read_file.readinto(bytearray(16)), None) self.assertEqual(self.read_file.read(1), None) def _testSmallReadNonBlocking(self): self.evt1.wait(1.0) self.write_file.write(self.write_msg) self.write_file.flush() self.evt2.set() # Avoid cloding the socket before the server test has finished, # otherwise system recv() will return 0 instead of EWOULDBLOCK. self.serv_finished.wait(5.0) def testWriteNonBlocking(self): self.cli_finished.wait(5.0) # The client thread can't skip directly - the SkipTest exception # would appear as a failure. if self.serv_skipped: self.skipTest(self.serv_skipped) def _testWriteNonBlocking(self): self.serv_skipped = None self.serv_conn.setblocking(False) # Try to saturate the socket buffer pipe with repeated large writes. BIG = b"x" * support.SOCK_MAX_SIZE LIMIT = 10 # The first write() succeeds since a chunk of data can be buffered n = self.write_file.write(BIG) self.assertGreater(n, 0) for i in range(LIMIT): n = self.write_file.write(BIG) if n is None: # Succeeded break self.assertGreater(n, 0) else: # Let us know that this test didn't manage to establish # the expected conditions. This is not a failure in itself but, # if it happens repeatedly, the test should be fixed. self.serv_skipped = "failed to saturate the socket buffer" class LineBufferedFileObjectClassTestCase(FileObjectClassTestCase): bufsize = 1 # Default-buffered for reading; line-buffered for writing class SmallBufferedFileObjectClassTestCase(FileObjectClassTestCase): bufsize = 2 # Exercise the buffering code class UnicodeReadFileObjectClassTestCase(FileObjectClassTestCase): """Tests for socket.makefile() in text mode (rather than binary)""" read_mode = 'r' read_msg = MSG.decode('utf-8') write_mode = 'wb' write_msg = MSG newline = '' class UnicodeWriteFileObjectClassTestCase(FileObjectClassTestCase): """Tests for socket.makefile() in text mode (rather than binary)""" read_mode = 'rb' read_msg = MSG write_mode = 'w' write_msg = MSG.decode('utf-8') newline = '' class UnicodeReadWriteFileObjectClassTestCase(FileObjectClassTestCase): """Tests for socket.makefile() in text mode (rather than binary)""" read_mode = 'r' read_msg = MSG.decode('utf-8') write_mode = 'w' write_msg = MSG.decode('utf-8') newline = '' class NetworkConnectionTest(object): """Prove network connection.""" def clientSetUp(self): # We're inherited below by BasicTCPTest2, which also inherits # BasicTCPTest, which defines self.port referenced below. self.cli = socket.create_connection((HOST, self.port)) self.serv_conn = self.cli class BasicTCPTest2(NetworkConnectionTest, BasicTCPTest): """Tests that NetworkConnection does not break existing TCP functionality. """ class NetworkConnectionNoServer(unittest.TestCase): class MockSocket(socket.socket): def connect(self, *args): raise socket.timeout('timed out') @contextlib.contextmanager def mocked_socket_module(self): """Return a socket which times out on connect""" old_socket = socket.socket socket.socket = self.MockSocket try: yield finally: socket.socket = old_socket def test_connect(self): port = support.find_unused_port() cli = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.addCleanup(cli.close) with self.assertRaises(socket.error) as cm: cli.connect((HOST, port)) self.assertEqual(cm.exception.errno, errno.ECONNREFUSED) def test_create_connection(self): # Issue #9792: errors raised by create_connection() should have # a proper errno attribute. port = support.find_unused_port() with self.assertRaises(socket.error) as cm: socket.create_connection((HOST, port)) # Issue #16257: create_connection() calls getaddrinfo() against # 'localhost'. This may result in an IPV6 addr being returned # as well as an IPV4 one: # >>> socket.getaddrinfo('localhost', port, 0, SOCK_STREAM) # >>> [(2, 2, 0, '', ('127.0.0.1', 41230)), # (26, 2, 0, '', ('::1', 41230, 0, 0))] # # create_connection() enumerates through all the addresses returned # and if it doesn't successfully bind to any of them, it propagates # the last exception it encountered. # # On Solaris, ENETUNREACH is returned in this circumstance instead # of ECONNREFUSED. So, if that errno exists, add it to our list of # expected errnos. expected_errnos = [ errno.ECONNREFUSED, ] if hasattr(errno, 'ENETUNREACH'): expected_errnos.append(errno.ENETUNREACH) self.assertIn(cm.exception.errno, expected_errnos) def test_create_connection_timeout(self): # Issue #9792: create_connection() should not recast timeout errors # as generic socket errors. with self.mocked_socket_module(): with self.assertRaises(socket.timeout): socket.create_connection((HOST, 1234)) @unittest.skipUnless(thread, 'Threading required for this test.') class NetworkConnectionAttributesTest(SocketTCPTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketTCPTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): self.source_port = support.find_unused_port() def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) def _justAccept(self): conn, addr = self.serv.accept() conn.close() testFamily = _justAccept def _testFamily(self): self.cli = socket.create_connection((HOST, self.port), timeout=30) self.addCleanup(self.cli.close) self.assertEqual(self.cli.family, 2) testSourceAddress = _justAccept def _testSourceAddress(self): self.cli = socket.create_connection((HOST, self.port), timeout=30, source_address=('', self.source_port)) self.addCleanup(self.cli.close) self.assertEqual(self.cli.getsockname()[1], self.source_port) # The port number being used is sufficient to show that the bind() # call happened. testTimeoutDefault = _justAccept def _testTimeoutDefault(self): # passing no explicit timeout uses socket's global default self.assertTrue(socket.getdefaulttimeout() is None) socket.setdefaulttimeout(42) try: self.cli = socket.create_connection((HOST, self.port)) self.addCleanup(self.cli.close) finally: socket.setdefaulttimeout(None) self.assertEqual(self.cli.gettimeout(), 42) testTimeoutNone = _justAccept def _testTimeoutNone(self): # None timeout means the same as sock.settimeout(None) self.assertTrue(socket.getdefaulttimeout() is None) socket.setdefaulttimeout(30) try: self.cli = socket.create_connection((HOST, self.port), timeout=None) self.addCleanup(self.cli.close) finally: socket.setdefaulttimeout(None) self.assertEqual(self.cli.gettimeout(), None) testTimeoutValueNamed = _justAccept def _testTimeoutValueNamed(self): self.cli = socket.create_connection((HOST, self.port), timeout=30) self.assertEqual(self.cli.gettimeout(), 30) testTimeoutValueNonamed = _justAccept def _testTimeoutValueNonamed(self): self.cli = socket.create_connection((HOST, self.port), 30) self.addCleanup(self.cli.close) self.assertEqual(self.cli.gettimeout(), 30) @unittest.skipUnless(thread, 'Threading required for this test.') class NetworkConnectionBehaviourTest(SocketTCPTest, ThreadableTest): def __init__(self, methodName='runTest'): SocketTCPTest.__init__(self, methodName=methodName) ThreadableTest.__init__(self) def clientSetUp(self): pass def clientTearDown(self): self.cli.close() self.cli = None ThreadableTest.clientTearDown(self) def testInsideTimeout(self): conn, addr = self.serv.accept() self.addCleanup(conn.close) time.sleep(3) conn.send(b"done!") testOutsideTimeout = testInsideTimeout def _testInsideTimeout(self): self.cli = sock = socket.create_connection((HOST, self.port)) data = sock.recv(5) self.assertEqual(data, b"done!") def _testOutsideTimeout(self): self.cli = sock = socket.create_connection((HOST, self.port), timeout=1) self.assertRaises(socket.timeout, lambda: sock.recv(5)) class TCPTimeoutTest(SocketTCPTest): def testTCPTimeout(self): def raise_timeout(*args, **kwargs): self.serv.settimeout(1.0) self.serv.accept() self.assertRaises(socket.timeout, raise_timeout, "Error generating a timeout exception (TCP)") def testTimeoutZero(self): ok = False try: self.serv.settimeout(0.0) foo = self.serv.accept() except socket.timeout: self.fail("caught timeout instead of error (TCP)") except socket.error: ok = True except: self.fail("caught unexpected exception (TCP)") if not ok: self.fail("accept() returned success when we did not expect it") @unittest.skipUnless(hasattr(signal, 'alarm'), 'test needs signal.alarm()') def testInterruptedTimeout(self): # XXX I don't know how to do this test on MSWindows or any other # plaform that doesn't support signal.alarm() or os.kill(), though # the bug should have existed on all platforms. self.serv.settimeout(5.0) # must be longer than alarm class Alarm(Exception): pass def alarm_handler(signal, frame): raise Alarm old_alarm = signal.signal(signal.SIGALRM, alarm_handler) try: signal.alarm(2) # POSIX allows alarm to be up to 1 second early try: foo = self.serv.accept() except socket.timeout: self.fail("caught timeout instead of Alarm") except Alarm: pass except: self.fail("caught other exception instead of Alarm:" " %s(%s):\n%s" % (sys.exc_info()[:2] + (traceback.format_exc(),))) else: self.fail("nothing caught") finally: signal.alarm(0) # shut off alarm except Alarm: self.fail("got Alarm in wrong place") finally: # no alarm can be pending. Safe to restore old handler. signal.signal(signal.SIGALRM, old_alarm) class UDPTimeoutTest(SocketUDPTest): def testUDPTimeout(self): def raise_timeout(*args, **kwargs): self.serv.settimeout(1.0) self.serv.recv(1024) self.assertRaises(socket.timeout, raise_timeout, "Error generating a timeout exception (UDP)") def testTimeoutZero(self): ok = False try: self.serv.settimeout(0.0) foo = self.serv.recv(1024) except socket.timeout: self.fail("caught timeout instead of error (UDP)") except socket.error: ok = True except: self.fail("caught unexpected exception (UDP)") if not ok: self.fail("recv() returned success when we did not expect it") class TestExceptions(unittest.TestCase): def testExceptionTree(self): self.assertTrue(issubclass(socket.error, Exception)) self.assertTrue(issubclass(socket.herror, socket.error)) self.assertTrue(issubclass(socket.gaierror, socket.error)) self.assertTrue(issubclass(socket.timeout, socket.error)) @unittest.skipUnless(sys.platform == 'linux', 'Linux specific test') class TestLinuxAbstractNamespace(unittest.TestCase): UNIX_PATH_MAX = 108 def testLinuxAbstractNamespace(self): address = b"\x00python-test-hello\x00\xff" with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as s1: s1.bind(address) s1.listen(1) with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as s2: s2.connect(s1.getsockname()) with s1.accept()[0] as s3: self.assertEqual(s1.getsockname(), address) self.assertEqual(s2.getpeername(), address) def testMaxName(self): address = b"\x00" + b"h" * (self.UNIX_PATH_MAX - 1) with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as s: s.bind(address) self.assertEqual(s.getsockname(), address) def testNameOverflow(self): address = "\x00" + "h" * self.UNIX_PATH_MAX with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as s: self.assertRaises(socket.error, s.bind, address) def testStrName(self): # Check that an abstract name can be passed as a string. s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) try: s.bind("\x00python\x00test\x00") self.assertEqual(s.getsockname(), b"\x00python\x00test\x00") finally: s.close() @unittest.skipUnless(hasattr(socket, 'AF_UNIX'), 'test needs socket.AF_UNIX') class TestUnixDomain(unittest.TestCase): def setUp(self): self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) def tearDown(self): self.sock.close() def encoded(self, path): # Return the given path encoded in the file system encoding, # or skip the test if this is not possible. try: return os.fsencode(path) except UnicodeEncodeError: self.skipTest( "Pathname {0!a} cannot be represented in file " "system encoding {1!r}".format( path, sys.getfilesystemencoding())) def bind(self, sock, path): # Bind the socket try: sock.bind(path) except OSError as e: if str(e) == "AF_UNIX path too long": self.skipTest( "Pathname {0!a} is too long to serve as a AF_UNIX path" .format(path)) else: raise def testStrAddr(self): # Test binding to and retrieving a normal string pathname. path = os.path.abspath(support.TESTFN) self.bind(self.sock, path) self.addCleanup(support.unlink, path) self.assertEqual(self.sock.getsockname(), path) def testBytesAddr(self): # Test binding to a bytes pathname. path = os.path.abspath(support.TESTFN) self.bind(self.sock, self.encoded(path)) self.addCleanup(support.unlink, path) self.assertEqual(self.sock.getsockname(), path) def testSurrogateescapeBind(self): # Test binding to a valid non-ASCII pathname, with the # non-ASCII bytes supplied using surrogateescape encoding. path = os.path.abspath(support.TESTFN_UNICODE) b = self.encoded(path) self.bind(self.sock, b.decode("ascii", "surrogateescape")) self.addCleanup(support.unlink, path) self.assertEqual(self.sock.getsockname(), path) def testUnencodableAddr(self): # Test binding to a pathname that cannot be encoded in the # file system encoding. if support.TESTFN_UNENCODABLE is None: self.skipTest("No unencodable filename available") path = os.path.abspath(support.TESTFN_UNENCODABLE) self.bind(self.sock, path) self.addCleanup(support.unlink, path) self.assertEqual(self.sock.getsockname(), path) @unittest.skipUnless(thread, 'Threading required for this test.') class BufferIOTest(SocketConnectedTest): """ Test the buffer versions of socket.recv() and socket.send(). """ def __init__(self, methodName='runTest'): SocketConnectedTest.__init__(self, methodName=methodName) def testRecvIntoArray(self): buf = bytearray(1024) nbytes = self.cli_conn.recv_into(buf) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) def _testRecvIntoArray(self): buf = bytes(MSG) self.serv_conn.send(buf) def testRecvIntoBytearray(self): buf = bytearray(1024) nbytes = self.cli_conn.recv_into(buf) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) _testRecvIntoBytearray = _testRecvIntoArray def testRecvIntoMemoryview(self): buf = bytearray(1024) nbytes = self.cli_conn.recv_into(memoryview(buf)) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) _testRecvIntoMemoryview = _testRecvIntoArray def testRecvFromIntoArray(self): buf = bytearray(1024) nbytes, addr = self.cli_conn.recvfrom_into(buf) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) def _testRecvFromIntoArray(self): buf = bytes(MSG) self.serv_conn.send(buf) def testRecvFromIntoBytearray(self): buf = bytearray(1024) nbytes, addr = self.cli_conn.recvfrom_into(buf) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) _testRecvFromIntoBytearray = _testRecvFromIntoArray def testRecvFromIntoMemoryview(self): buf = bytearray(1024) nbytes, addr = self.cli_conn.recvfrom_into(memoryview(buf)) self.assertEqual(nbytes, len(MSG)) msg = buf[:len(MSG)] self.assertEqual(msg, MSG) _testRecvFromIntoMemoryview = _testRecvFromIntoArray def testRecvFromIntoSmallBuffer(self): # See issue #20246. buf = bytearray(8) self.assertRaises(ValueError, self.cli_conn.recvfrom_into, buf, 1024) def _testRecvFromIntoSmallBuffer(self): self.serv_conn.send(MSG) def testRecvFromIntoEmptyBuffer(self): buf = bytearray() self.cli_conn.recvfrom_into(buf) self.cli_conn.recvfrom_into(buf, 0) _testRecvFromIntoEmptyBuffer = _testRecvFromIntoArray TIPC_STYPE = 2000 TIPC_LOWER = 200 TIPC_UPPER = 210 def isTipcAvailable(): """Check if the TIPC module is loaded The TIPC module is not loaded automatically on Ubuntu and probably other Linux distros. """ if not hasattr(socket, "AF_TIPC"): return False if not os.path.isfile("/proc/modules"): return False with open("/proc/modules") as f: for line in f: if line.startswith("tipc "): return True return False @unittest.skipUnless(isTipcAvailable(), "TIPC module is not loaded, please 'sudo modprobe tipc'") class TIPCTest(unittest.TestCase): def testRDM(self): srv = socket.socket(socket.AF_TIPC, socket.SOCK_RDM) cli = socket.socket(socket.AF_TIPC, socket.SOCK_RDM) self.addCleanup(srv.close) self.addCleanup(cli.close) srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) srvaddr = (socket.TIPC_ADDR_NAMESEQ, TIPC_STYPE, TIPC_LOWER, TIPC_UPPER) srv.bind(srvaddr) sendaddr = (socket.TIPC_ADDR_NAME, TIPC_STYPE, TIPC_LOWER + int((TIPC_UPPER - TIPC_LOWER) / 2), 0) cli.sendto(MSG, sendaddr) msg, recvaddr = srv.recvfrom(1024) self.assertEqual(cli.getsockname(), recvaddr) self.assertEqual(msg, MSG) @unittest.skipUnless(isTipcAvailable(), "TIPC module is not loaded, please 'sudo modprobe tipc'") class TIPCThreadableTest(unittest.TestCase, ThreadableTest): def __init__(self, methodName = 'runTest'): unittest.TestCase.__init__(self, methodName = methodName) ThreadableTest.__init__(self) def setUp(self): self.srv = socket.socket(socket.AF_TIPC, socket.SOCK_STREAM) self.addCleanup(self.srv.close) self.srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) srvaddr = (socket.TIPC_ADDR_NAMESEQ, TIPC_STYPE, TIPC_LOWER, TIPC_UPPER) self.srv.bind(srvaddr) self.srv.listen(5) self.serverExplicitReady() self.conn, self.connaddr = self.srv.accept() self.addCleanup(self.conn.close) def clientSetUp(self): # The is a hittable race between serverExplicitReady() and the # accept() call; sleep a little while to avoid it, otherwise # we could get an exception time.sleep(0.1) self.cli = socket.socket(socket.AF_TIPC, socket.SOCK_STREAM) self.addCleanup(self.cli.close) addr = (socket.TIPC_ADDR_NAME, TIPC_STYPE, TIPC_LOWER + int((TIPC_UPPER - TIPC_LOWER) / 2), 0) self.cli.connect(addr) self.cliaddr = self.cli.getsockname() def testStream(self): msg = self.conn.recv(1024) self.assertEqual(msg, MSG) self.assertEqual(self.cliaddr, self.connaddr) def _testStream(self): self.cli.send(MSG) self.cli.close() @unittest.skipUnless(thread, 'Threading required for this test.') class ContextManagersTest(ThreadedTCPSocketTest): def _testSocketClass(self): # base test with socket.socket() as sock: self.assertFalse(sock._closed) self.assertTrue(sock._closed) # close inside with block with socket.socket() as sock: sock.close() self.assertTrue(sock._closed) # exception inside with block with socket.socket() as sock: self.assertRaises(socket.error, sock.sendall, b'foo') self.assertTrue(sock._closed) def testCreateConnectionBase(self): conn, addr = self.serv.accept() self.addCleanup(conn.close) data = conn.recv(1024) conn.sendall(data) def _testCreateConnectionBase(self): address = self.serv.getsockname() with socket.create_connection(address) as sock: self.assertFalse(sock._closed) sock.sendall(b'foo') self.assertEqual(sock.recv(1024), b'foo') self.assertTrue(sock._closed) def testCreateConnectionClose(self): conn, addr = self.serv.accept() self.addCleanup(conn.close) data = conn.recv(1024) conn.sendall(data) def _testCreateConnectionClose(self): address = self.serv.getsockname() with socket.create_connection(address) as sock: sock.close() self.assertTrue(sock._closed) self.assertRaises(socket.error, sock.sendall, b'foo') @unittest.skipUnless(hasattr(socket, "SOCK_CLOEXEC"), "SOCK_CLOEXEC not defined") @unittest.skipUnless(fcntl, "module fcntl not available") class CloexecConstantTest(unittest.TestCase): @support.requires_linux_version(2, 6, 28) def test_SOCK_CLOEXEC(self): with socket.socket(socket.AF_INET, socket.SOCK_STREAM | socket.SOCK_CLOEXEC) as s: self.assertTrue(s.type & socket.SOCK_CLOEXEC) self.assertTrue(fcntl.fcntl(s, fcntl.F_GETFD) & fcntl.FD_CLOEXEC) @unittest.skipUnless(hasattr(socket, "SOCK_NONBLOCK"), "SOCK_NONBLOCK not defined") class NonblockConstantTest(unittest.TestCase): def checkNonblock(self, s, nonblock=True, timeout=0.0): if nonblock: self.assertTrue(s.type & socket.SOCK_NONBLOCK) self.assertEqual(s.gettimeout(), timeout) else: self.assertFalse(s.type & socket.SOCK_NONBLOCK) self.assertEqual(s.gettimeout(), None) @support.requires_linux_version(2, 6, 28) def test_SOCK_NONBLOCK(self): # a lot of it seems silly and redundant, but I wanted to test that # changing back and forth worked ok with socket.socket(socket.AF_INET, socket.SOCK_STREAM | socket.SOCK_NONBLOCK) as s: self.checkNonblock(s) s.setblocking(1) self.checkNonblock(s, False) s.setblocking(0) self.checkNonblock(s) s.settimeout(None) self.checkNonblock(s, False) s.settimeout(2.0) self.checkNonblock(s, timeout=2.0) s.setblocking(1) self.checkNonblock(s, False) # defaulttimeout t = socket.getdefaulttimeout() socket.setdefaulttimeout(0.0) with socket.socket() as s: self.checkNonblock(s) socket.setdefaulttimeout(None) with socket.socket() as s: self.checkNonblock(s, False) socket.setdefaulttimeout(2.0) with socket.socket() as s: self.checkNonblock(s, timeout=2.0) socket.setdefaulttimeout(None) with socket.socket() as s: self.checkNonblock(s, False) socket.setdefaulttimeout(t) @unittest.skipUnless(os.name == "nt", "Windows specific") @unittest.skipUnless(multiprocessing, "need multiprocessing") class TestSocketSharing(SocketTCPTest): # This must be classmethod and not staticmethod or multiprocessing # won't be able to bootstrap it. @classmethod def remoteProcessServer(cls, q): # Recreate socket from shared data sdata = q.get() message = q.get() s = socket.fromshare(sdata) s2, c = s.accept() # Send the message s2.sendall(message) s2.close() s.close() def testShare(self): # Transfer the listening server socket to another process # and service it from there. # Create process: q = multiprocessing.Queue() p = multiprocessing.Process(target=self.remoteProcessServer, args=(q,)) p.start() # Get the shared socket data data = self.serv.share(p.pid) # Pass the shared socket to the other process addr = self.serv.getsockname() self.serv.close() q.put(data) # The data that the server will send us message = b"slapmahfro" q.put(message) # Connect s = socket.create_connection(addr) # listen for the data m = [] while True: data = s.recv(100) if not data: break m.append(data) s.close() received = b"".join(m) self.assertEqual(received, message) p.join() def testShareLength(self): data = self.serv.share(os.getpid()) self.assertRaises(ValueError, socket.fromshare, data[:-1]) self.assertRaises(ValueError, socket.fromshare, data+b"foo") def compareSockets(self, org, other): # socket sharing is expected to work only for blocking socket # since the internal python timout value isn't transfered. self.assertEqual(org.gettimeout(), None) self.assertEqual(org.gettimeout(), other.gettimeout()) self.assertEqual(org.family, other.family) self.assertEqual(org.type, other.type) # If the user specified "0" for proto, then # internally windows will have picked the correct value. # Python introspection on the socket however will still return # 0. For the shared socket, the python value is recreated # from the actual value, so it may not compare correctly. if org.proto != 0: self.assertEqual(org.proto, other.proto) def testShareLocal(self): data = self.serv.share(os.getpid()) s = socket.fromshare(data) try: self.compareSockets(self.serv, s) finally: s.close() def testTypes(self): families = [socket.AF_INET, socket.AF_INET6] types = [socket.SOCK_STREAM, socket.SOCK_DGRAM] for f in families: for t in types: try: source = socket.socket(f, t) except OSError: continue # This combination is not supported try: data = source.share(os.getpid()) shared = socket.fromshare(data) try: self.compareSockets(source, shared) finally: shared.close() finally: source.close() def test_main(): tests = [GeneralModuleTests, BasicTCPTest, TCPCloserTest, TCPTimeoutTest, TestExceptions, BufferIOTest, BasicTCPTest2, BasicUDPTest, UDPTimeoutTest ] tests.extend([ NonBlockingTCPTests, FileObjectClassTestCase, FileObjectInterruptedTestCase, UnbufferedFileObjectClassTestCase, LineBufferedFileObjectClassTestCase, SmallBufferedFileObjectClassTestCase, UnicodeReadFileObjectClassTestCase, UnicodeWriteFileObjectClassTestCase, UnicodeReadWriteFileObjectClassTestCase, NetworkConnectionNoServer, NetworkConnectionAttributesTest, NetworkConnectionBehaviourTest, ContextManagersTest, CloexecConstantTest, NonblockConstantTest ]) tests.append(BasicSocketPairTest) tests.append(TestUnixDomain) tests.append(TestLinuxAbstractNamespace) tests.extend([TIPCTest, TIPCThreadableTest]) tests.extend([BasicCANTest, CANTest]) tests.extend([BasicRDSTest, RDSTest]) tests.extend([ CmsgMacroTests, SendmsgUDPTest, RecvmsgUDPTest, RecvmsgIntoUDPTest, SendmsgUDP6Test, RecvmsgUDP6Test, RecvmsgRFC3542AncillaryUDP6Test, RecvmsgIntoRFC3542AncillaryUDP6Test, RecvmsgIntoUDP6Test, SendmsgTCPTest, RecvmsgTCPTest, RecvmsgIntoTCPTest, SendmsgSCTPStreamTest, RecvmsgSCTPStreamTest, RecvmsgIntoSCTPStreamTest, SendmsgUnixStreamTest, RecvmsgUnixStreamTest, RecvmsgIntoUnixStreamTest, RecvmsgSCMRightsStreamTest, RecvmsgIntoSCMRightsStreamTest, # These are slow when setitimer() is not available InterruptedRecvTimeoutTest, InterruptedSendTimeoutTest, TestSocketSharing, ]) thread_info = support.threading_setup() support.run_unittest(*tests) support.threading_cleanup(*thread_info) if __name__ == "__main__": test_main()