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vnc.py
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vnc.py
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# Simple functional tests for VNC functionality
#
# Copyright (c) 2018 Red Hat, Inc.
#
# Author:
# Cleber Rosa <crosa@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import socket
from typing import List
from avocado_qemu import QemuSystemTest
VNC_ADDR = '127.0.0.1'
VNC_PORT_START = 32768
VNC_PORT_END = VNC_PORT_START + 1024
def check_bind(port: int) -> bool:
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
try:
sock.bind((VNC_ADDR, port))
except OSError:
return False
return True
def check_connect(port: int) -> bool:
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
try:
sock.connect((VNC_ADDR, port))
except ConnectionRefusedError:
return False
return True
def find_free_ports(count: int) -> List[int]:
result = []
for port in range(VNC_PORT_START, VNC_PORT_END):
if check_bind(port):
result.append(port)
if len(result) >= count:
break
assert len(result) == count
return result
class Vnc(QemuSystemTest):
"""
:avocado: tags=vnc,quick
"""
def test_no_vnc(self):
self.vm.add_args('-nodefaults', '-S')
self.vm.launch()
self.assertFalse(self.vm.qmp('query-vnc')['return']['enabled'])
def test_no_vnc_change_password(self):
self.vm.add_args('-nodefaults', '-S')
self.vm.launch()
self.assertFalse(self.vm.qmp('query-vnc')['return']['enabled'])
set_password_response = self.vm.qmp('change-vnc-password',
password='new_password')
self.assertIn('error', set_password_response)
self.assertEqual(set_password_response['error']['class'],
'GenericError')
self.assertEqual(set_password_response['error']['desc'],
'Could not set password')
def test_change_password_requires_a_password(self):
self.vm.add_args('-nodefaults', '-S', '-vnc', ':0')
self.vm.launch()
self.assertTrue(self.vm.qmp('query-vnc')['return']['enabled'])
set_password_response = self.vm.qmp('change-vnc-password',
password='new_password')
self.assertIn('error', set_password_response)
self.assertEqual(set_password_response['error']['class'],
'GenericError')
self.assertEqual(set_password_response['error']['desc'],
'Could not set password')
def test_change_password(self):
self.vm.add_args('-nodefaults', '-S', '-vnc', ':0,password=on')
self.vm.launch()
self.assertTrue(self.vm.qmp('query-vnc')['return']['enabled'])
set_password_response = self.vm.qmp('change-vnc-password',
password='new_password')
self.assertEqual(set_password_response['return'], {})
def test_change_listen(self):
a, b, c = find_free_ports(3)
self.assertFalse(check_connect(a))
self.assertFalse(check_connect(b))
self.assertFalse(check_connect(c))
self.vm.add_args('-nodefaults', '-S', '-vnc', f'{VNC_ADDR}:{a - 5900}')
self.vm.launch()
self.assertEqual(self.vm.qmp('query-vnc')['return']['service'], str(a))
self.assertTrue(check_connect(a))
self.assertFalse(check_connect(b))
self.assertFalse(check_connect(c))
res = self.vm.qmp('display-update', type='vnc',
addresses=[{'type': 'inet', 'host': VNC_ADDR,
'port': str(b)},
{'type': 'inet', 'host': VNC_ADDR,
'port': str(c)}])
self.assertEqual(res['return'], {})
self.assertEqual(self.vm.qmp('query-vnc')['return']['service'], str(b))
self.assertFalse(check_connect(a))
self.assertTrue(check_connect(b))
self.assertTrue(check_connect(c))