Method checkRecvmsgFDs

Lib/test/test_socket.py:3983–4008

(self, numfds, result, maxcmsgs=1, ignoreflags=0)

            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).