mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-28 19:28:07 +00:00
672 lines
21 KiB
Python
672 lines
21 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2014 GNS3 Technologies Inc.
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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 General Public License as published by
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# the Free Software Foundation, either version 3 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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QEMU server module.
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"""
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import sys
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import os
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import socket
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import shutil
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import subprocess
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import re
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from gns3server.modules import IModule
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from gns3server.config import Config
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from .qemu_vm import QemuVM
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from .qemu_error import QemuError
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from .nios.nio_udp import NIO_UDP
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from ..attic import find_unused_port
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from .schemas import QEMU_CREATE_SCHEMA
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from .schemas import QEMU_DELETE_SCHEMA
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from .schemas import QEMU_UPDATE_SCHEMA
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from .schemas import QEMU_START_SCHEMA
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from .schemas import QEMU_STOP_SCHEMA
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from .schemas import QEMU_SUSPEND_SCHEMA
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from .schemas import QEMU_RELOAD_SCHEMA
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from .schemas import QEMU_ALLOCATE_UDP_PORT_SCHEMA
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from .schemas import QEMU_ADD_NIO_SCHEMA
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from .schemas import QEMU_DELETE_NIO_SCHEMA
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import logging
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log = logging.getLogger(__name__)
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class Qemu(IModule):
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"""
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QEMU module.
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:param name: module name
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:param args: arguments for the module
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:param kwargs: named arguments for the module
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"""
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def __init__(self, name, *args, **kwargs):
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# a new process start when calling IModule
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IModule.__init__(self, name, *args, **kwargs)
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self._qemu_instances = {}
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config = Config.instance()
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qemu_config = config.get_section_config(name.upper())
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self._console_start_port_range = qemu_config.get("console_start_port_range", 5001)
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self._console_end_port_range = qemu_config.get("console_end_port_range", 5500)
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self._allocated_udp_ports = []
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self._udp_start_port_range = qemu_config.get("udp_start_port_range", 40001)
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self._udp_end_port_range = qemu_config.get("udp_end_port_range", 45500)
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self._host = qemu_config.get("host", kwargs["host"])
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self._console_host = qemu_config.get("console_host", kwargs["console_host"])
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self._projects_dir = kwargs["projects_dir"]
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self._tempdir = kwargs["temp_dir"]
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self._working_dir = self._projects_dir
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def stop(self, signum=None):
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"""
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Properly stops the module.
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:param signum: signal number (if called by the signal handler)
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"""
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# delete all QEMU instances
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for qemu_id in self._qemu_instances:
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qemu_instance = self._qemu_instances[qemu_id]
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qemu_instance.delete()
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IModule.stop(self, signum) # this will stop the I/O loop
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def get_qemu_instance(self, qemu_id):
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"""
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Returns a QEMU VM instance.
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:param qemu_id: QEMU VM identifier
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:returns: QemuVM instance
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"""
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if qemu_id not in self._qemu_instances:
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log.debug("QEMU VM ID {} doesn't exist".format(qemu_id), exc_info=1)
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self.send_custom_error("QEMU VM ID {} doesn't exist".format(qemu_id))
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return None
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return self._qemu_instances[qemu_id]
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@IModule.route("qemu.reset")
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def reset(self, request):
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"""
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Resets the module.
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:param request: JSON request
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"""
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# delete all QEMU instances
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for qemu_id in self._qemu_instances:
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qemu_instance = self._qemu_instances[qemu_id]
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qemu_instance.delete()
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# resets the instance IDs
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QemuVM.reset()
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self._qemu_instances.clear()
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self._allocated_udp_ports.clear()
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self._working_dir = self._projects_dir
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log.info("QEMU module has been reset")
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@IModule.route("qemu.settings")
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def settings(self, request):
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"""
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Set or update settings.
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Optional request parameters:
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- working_dir (path to a working directory)
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- project_name
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- console_start_port_range
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- console_end_port_range
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- udp_start_port_range
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- udp_end_port_range
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:param request: JSON request
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"""
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if request is None:
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self.send_param_error()
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return
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if "working_dir" in request:
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new_working_dir = request["working_dir"]
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log.info("this server is local with working directory path to {}".format(new_working_dir))
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else:
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new_working_dir = os.path.join(self._projects_dir, request["project_name"])
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log.info("this server is remote with working directory path to {}".format(new_working_dir))
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if self._projects_dir != self._working_dir != new_working_dir:
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if not os.path.isdir(new_working_dir):
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try:
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shutil.move(self._working_dir, new_working_dir)
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except OSError as e:
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log.error("could not move working directory from {} to {}: {}".format(self._working_dir,
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new_working_dir,
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e))
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return
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# update the working directory if it has changed
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if self._working_dir != new_working_dir:
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self._working_dir = new_working_dir
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for qemu_id in self._qemu_instances:
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qemu_instance = self._qemu_instances[qemu_id]
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qemu_instance.working_dir = os.path.join(self._working_dir, "qemu", "vm-{}".format(qemu_instance.id))
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if "console_start_port_range" in request and "console_end_port_range" in request:
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self._console_start_port_range = request["console_start_port_range"]
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self._console_end_port_range = request["console_end_port_range"]
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if "udp_start_port_range" in request and "udp_end_port_range" in request:
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self._udp_start_port_range = request["udp_start_port_range"]
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self._udp_end_port_range = request["udp_end_port_range"]
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log.debug("received request {}".format(request))
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@IModule.route("qemu.create")
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def qemu_create(self, request):
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"""
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Creates a new QEMU VM instance.
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Mandatory request parameters:
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- name (QEMU VM name)
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- qemu_path (path to the Qemu binary)
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Optional request parameters:
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- console (QEMU VM console port)
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Response parameters:
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- id (QEMU VM instance identifier)
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- name (QEMU VM name)
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- default settings
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_CREATE_SCHEMA):
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return
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name = request["name"]
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qemu_path = request["qemu_path"]
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console = request.get("console")
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qemu_id = request.get("qemu_id")
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try:
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qemu_instance = QemuVM(name,
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qemu_path,
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self._working_dir,
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self._host,
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qemu_id,
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console,
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self._console_host,
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self._console_start_port_range,
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self._console_end_port_range)
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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response = {"name": qemu_instance.name,
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"id": qemu_instance.id}
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defaults = qemu_instance.defaults()
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response.update(defaults)
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self._qemu_instances[qemu_instance.id] = qemu_instance
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self.send_response(response)
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@IModule.route("qemu.delete")
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def qemu_delete(self, request):
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"""
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Deletes a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Response parameter:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_DELETE_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.clean_delete()
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del self._qemu_instances[request["id"]]
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.update")
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def qemu_update(self, request):
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"""
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Updates a QEMU VM instance
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Optional request parameters:
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- any setting to update
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Response parameters:
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- updated settings
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_UPDATE_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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# update the QEMU VM settings
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response = {}
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for name, value in request.items():
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if hasattr(qemu_instance, name) and getattr(qemu_instance, name) != value:
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try:
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setattr(qemu_instance, name, value)
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response[name] = value
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(response)
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@IModule.route("qemu.start")
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def qemu_start(self, request):
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"""
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Starts a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Response parameters:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_START_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.start()
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.stop")
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def qemu_stop(self, request):
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"""
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Stops a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Response parameters:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_STOP_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.stop()
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.reload")
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def qemu_reload(self, request):
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"""
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Reloads a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM identifier)
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Response parameters:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_RELOAD_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.reload()
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.stop")
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def qemu_stop(self, request):
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"""
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Stops a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Response parameters:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_STOP_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.stop()
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.suspend")
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def qemu_suspend(self, request):
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"""
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Suspends a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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Response parameters:
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- True on success
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_SUSPEND_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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qemu_instance.suspend()
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response(True)
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@IModule.route("qemu.allocate_udp_port")
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def allocate_udp_port(self, request):
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"""
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Allocates a UDP port in order to create an UDP NIO.
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Mandatory request parameters:
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- id (QEMU VM identifier)
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- port_id (unique port identifier)
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Response parameters:
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- port_id (unique port identifier)
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- lport (allocated local port)
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_ALLOCATE_UDP_PORT_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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try:
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port = find_unused_port(self._udp_start_port_range,
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self._udp_end_port_range,
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host=self._host,
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socket_type="UDP",
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ignore_ports=self._allocated_udp_ports)
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except Exception as e:
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self.send_custom_error(str(e))
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return
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self._allocated_udp_ports.append(port)
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log.info("{} [id={}] has allocated UDP port {} with host {}".format(qemu_instance.name,
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qemu_instance.id,
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port,
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self._host))
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response = {"lport": port,
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"port_id": request["port_id"]}
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self.send_response(response)
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@IModule.route("qemu.add_nio")
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def add_nio(self, request):
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"""
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Adds an NIO (Network Input/Output) for a QEMU VM instance.
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Mandatory request parameters:
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- id (QEMU VM instance identifier)
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- port (port number)
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- port_id (unique port identifier)
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- nio (one of the following)
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- type "nio_udp"
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- lport (local port)
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- rhost (remote host)
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- rport (remote port)
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Response parameters:
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- port_id (unique port identifier)
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:param request: JSON request
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"""
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# validate the request
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if not self.validate_request(request, QEMU_ADD_NIO_SCHEMA):
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return
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# get the instance
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qemu_instance = self.get_qemu_instance(request["id"])
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if not qemu_instance:
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return
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port = request["port"]
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try:
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nio = None
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if request["nio"]["type"] == "nio_udp":
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lport = request["nio"]["lport"]
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rhost = request["nio"]["rhost"]
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rport = request["nio"]["rport"]
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try:
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#TODO: handle IPv6
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with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
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sock.connect((rhost, rport))
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except OSError as e:
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raise QemuError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
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nio = NIO_UDP(lport, rhost, rport)
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if not nio:
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raise QemuError("Requested NIO does not exist or is not supported: {}".format(request["nio"]["type"]))
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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try:
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qemu_instance.port_add_nio_binding(port, nio)
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except QemuError as e:
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self.send_custom_error(str(e))
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return
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self.send_response({"port_id": request["port_id"]})
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@IModule.route("qemu.delete_nio")
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def delete_nio(self, request):
|
|
"""
|
|
Deletes an NIO (Network Input/Output).
|
|
|
|
Mandatory request parameters:
|
|
- id (QEMU VM instance identifier)
|
|
- port (port identifier)
|
|
|
|
Response parameters:
|
|
- True on success
|
|
|
|
:param request: JSON request
|
|
"""
|
|
|
|
# validate the request
|
|
if not self.validate_request(request, QEMU_DELETE_NIO_SCHEMA):
|
|
return
|
|
|
|
# get the instance
|
|
qemu_instance = self.get_qemu_instance(request["id"])
|
|
if not qemu_instance:
|
|
return
|
|
|
|
port = request["port"]
|
|
try:
|
|
nio = qemu_instance.port_remove_nio_binding(port)
|
|
if isinstance(nio, NIO_UDP) and nio.lport in self._allocated_udp_ports:
|
|
self._allocated_udp_ports.remove(nio.lport)
|
|
except QemuError as e:
|
|
self.send_custom_error(str(e))
|
|
return
|
|
|
|
self.send_response(True)
|
|
|
|
def _get_qemu_version(self, qemu_path):
|
|
"""
|
|
Gets the Qemu version.
|
|
|
|
:param qemu_path: path to Qemu
|
|
"""
|
|
|
|
if sys.platform.startswith("win"):
|
|
return ""
|
|
try:
|
|
output = subprocess.check_output([qemu_path, "-version"])
|
|
match = re.search("version\s+([0-9a-z\-\.]+)", output.decode("utf-8"))
|
|
if match:
|
|
version = match.group(1)
|
|
return version
|
|
else:
|
|
raise QemuError("Could not determine the Qemu version for {}".format(qemu_path))
|
|
except subprocess.SubprocessError as e:
|
|
raise QemuError("Error while looking for the Qemu version: {}".format(e))
|
|
|
|
@IModule.route("qemu.qemu_list")
|
|
def qemu_list(self, request):
|
|
"""
|
|
Gets QEMU binaries list.
|
|
|
|
Response parameters:
|
|
- List of Qemu binaries
|
|
"""
|
|
|
|
qemus = []
|
|
paths = [os.getcwd()] + os.environ["PATH"].split(os.pathsep)
|
|
# look for Qemu binaries in the current working directory and $PATH
|
|
if sys.platform.startswith("win"):
|
|
# add specific Windows paths
|
|
if hasattr(sys, "frozen"):
|
|
# add any qemu dir in the same location as gns3server.exe to the list of paths
|
|
exec_dir = os.path.dirname(os.path.abspath(sys.executable))
|
|
for f in os.listdir(exec_dir):
|
|
if f.lower().startswith("qemu"):
|
|
paths.append(os.path.join(exec_dir, f))
|
|
|
|
if "PROGRAMFILES(X86)" in os.environ and os.path.exists(os.environ["PROGRAMFILES(X86)"]):
|
|
paths.append(os.path.join(os.environ["PROGRAMFILES(X86)"], "qemu"))
|
|
if "PROGRAMFILES" in os.environ and os.path.exists(os.environ["PROGRAMFILES"]):
|
|
paths.append(os.path.join(os.environ["PROGRAMFILES"], "qemu"))
|
|
elif sys.platform.startswith("darwin"):
|
|
# add specific locations on Mac OS X regardless of what's in $PATH
|
|
paths.extend(["/usr/local/bin", "/opt/local/bin"])
|
|
if hasattr(sys, "frozen"):
|
|
paths.append(os.path.abspath(os.path.join(os.getcwd(), "../../../qemu/bin/")))
|
|
for path in paths:
|
|
try:
|
|
for f in os.listdir(path):
|
|
if (f.startswith("qemu-system") or f == "qemu" or f == "qemu.exe") and \
|
|
os.access(os.path.join(path, f), os.X_OK) and \
|
|
os.path.isfile(os.path.join(path, f)):
|
|
qemu_path = os.path.join(path, f)
|
|
version = self._get_qemu_version(qemu_path)
|
|
qemus.append({"path": qemu_path, "version": version})
|
|
except OSError:
|
|
continue
|
|
|
|
response = {"qemus": qemus}
|
|
self.send_response(response)
|
|
|
|
@IModule.route("qemu.echo")
|
|
def echo(self, request):
|
|
"""
|
|
Echo end point for testing purposes.
|
|
|
|
:param request: JSON request
|
|
"""
|
|
|
|
if request is None:
|
|
self.send_param_error()
|
|
else:
|
|
log.debug("received request {}".format(request))
|
|
self.send_response(request)
|