140 regels
4.1 KiB
Python
140 regels
4.1 KiB
Python
# -*- encoding: utf8 -*-
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2017 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program; if not, see <http://www.gnu.org/licenses/>.
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'''
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Main Qubes() class and related classes.
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'''
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import socket
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import subprocess
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import qubesmgmt.base
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import qubesmgmt.vm
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import qubesmgmt.exc
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QUBESD_SOCK = '/var/run/qubesd.sock'
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BUF_SIZE = 4096
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class VMCollection(object):
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'''Collection of VMs objects'''
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def __init__(self, app):
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self.app = app
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self._vm_list = None
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def clear_cache(self):
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'''Clear cached list of VMs'''
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self._vm_list = None
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def refresh_cache(self, force=False):
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'''Refresh cached list of VMs'''
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if not force and self._vm_list is not None:
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return
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vm_list_data = self.app.qubesd_call(
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'dom0',
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'mgmt.vm.List'
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)
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new_vm_list = {}
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# FIXME: this will probably change
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for vm_data in vm_list_data.splitlines():
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vm_name, props = vm_data.decode('ascii').split(' ', 1)
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props = props.split(' ')
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new_vm_list[vm_name] = dict(
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[vm_prop.split('=', 1) for vm_prop in props])
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self._vm_list = new_vm_list
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def __getitem__(self, item):
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if item not in self:
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raise KeyError(item)
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return qubesmgmt.vm.QubesVM(
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self.app, item, self._vm_list[item]['class'])
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def __contains__(self, item):
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self.refresh_cache()
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return item in self._vm_list
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def __iter__(self):
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self.refresh_cache()
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for vm in self._vm_list:
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yield self[vm]
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def keys(self):
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'''Get list of VM names.'''
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self.refresh_cache()
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return self._vm_list.keys()
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class QubesBase(qubesmgmt.base.PropertyHolder):
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'''Main Qubes application'''
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#: domains (VMs) collection
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domains = None
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def __init__(self):
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super(QubesBase, self).__init__(self, 'mgmt.global.', 'dom0')
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self.domains = VMCollection(self)
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class QubesLocal(QubesBase):
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'''Application object communicating through local socket.
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Used when running in dom0.
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'''
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def qubesd_call(self, dest, method, arg=None, payload=None):
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try:
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client_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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client_socket.connect(QUBESD_SOCK)
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except IOError:
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# TODO:
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raise
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# src, method, dest, arg
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for call_arg in ('dom0', method, dest, arg):
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client_socket.sendall(call_arg.encode('ascii'))
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client_socket.sendall(b'\0')
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if payload is not None:
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client_socket.sendall(payload)
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return_data = b''.join(iter(client_socket.recv(BUF_SIZE), b''))
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return self._parse_qubesd_response(return_data)
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class QubesRemote(QubesBase):
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'''Application object communicating through qrexec services.
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Used when running in VM.
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'''
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def qubesd_call(self, dest, method, arg=None, payload=None):
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service_name = method
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if arg is not None:
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service_name += '+' + arg
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p = subprocess.Popen(['qrexec-client-vm', dest, service_name],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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(stdout, stderr) = p.communicate(payload)
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if p.returncode != 0:
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# TODO: use dedicated exception
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raise qubesmgmt.exc.QubesException('Service call error: %s',
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stderr.decode())
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return self._parse_qubesd_response(stdout)
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