mirror of
https://github.com/GNS3/gns3-server
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651 lines
21 KiB
Python
651 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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VPCS server module.
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"""
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import os
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import base64
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import socket
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import shutil
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from gns3server.modules import IModule
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from gns3server.config import Config
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from .vpcs_device import VPCSDevice
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from .vpcs_error import VPCSError
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from .nios.nio_udp import NIO_UDP
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from .nios.nio_tap import NIO_TAP
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from ..attic import find_unused_port
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from .schemas import VPCS_CREATE_SCHEMA
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from .schemas import VPCS_DELETE_SCHEMA
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from .schemas import VPCS_UPDATE_SCHEMA
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from .schemas import VPCS_START_SCHEMA
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from .schemas import VPCS_STOP_SCHEMA
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from .schemas import VPCS_RELOAD_SCHEMA
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from .schemas import VPCS_ALLOCATE_UDP_PORT_SCHEMA
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from .schemas import VPCS_ADD_NIO_SCHEMA
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from .schemas import VPCS_DELETE_NIO_SCHEMA
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from .schemas import VPCS_EXPORT_CONFIG_SCHEMA
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import logging
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log = logging.getLogger(__name__)
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class VPCS(IModule):
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"""
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VPCS 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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# get the VPCS location
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config = Config.instance()
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vpcs_config = config.get_section_config(name.upper())
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self._vpcs = vpcs_config.get("vpcs_path")
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if not self._vpcs or not os.path.isfile(self._vpcs):
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paths = [os.getcwd()] + os.environ["PATH"].split(":")
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# look for VPCS in the current working directory and $PATH
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for path in paths:
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try:
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if "vpcs" in os.listdir(path) and os.access(os.path.join(path, "vpcs"), os.X_OK):
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self._vpcs = os.path.join(path, "vpcs")
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break
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except OSError:
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continue
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if not self._vpcs:
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log.warning("VPCS binary couldn't be found!")
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elif not os.access(self._vpcs, os.X_OK):
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log.warning("VPCS is not executable")
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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._vpcs_instances = {}
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self._console_start_port_range = vpcs_config.get("console_start_port_range", 4512)
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self._console_end_port_range = vpcs_config.get("console_end_port_range", 5000)
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self._allocated_udp_ports = []
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self._udp_start_port_range = vpcs_config.get("udp_start_port_range", 40001)
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self._udp_end_port_range = vpcs_config.get("udp_end_port_range", 40512)
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self._host = kwargs["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 VPCS instances
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for vpcs_id in self._vpcs_instances:
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vpcs_instance = self._vpcs_instances[vpcs_id]
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vpcs_instance.delete()
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IModule.stop(self, signum) # this will stop the I/O loop
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def get_vpcs_instance(self, vpcs_id):
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"""
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Returns a VPCS device instance.
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:param vpcs_id: VPCS device identifier
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:returns: VPCSDevice instance
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"""
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if vpcs_id not in self._vpcs_instances:
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log.debug("VPCS device ID {} doesn't exist".format(vpcs_id), exc_info=1)
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self.send_custom_error("VPCS device ID {} doesn't exist".format(vpcs_id))
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return None
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return self._vpcs_instances[vpcs_id]
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@IModule.route("vpcs.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 vpcs instances
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for vpcs_id in self._vpcs_instances:
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vpcs_instance = self._vpcs_instances[vpcs_id]
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vpcs_instance.delete()
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# resets the instance IDs
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VPCSDevice.reset()
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self._vpcs_instances.clear()
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self._allocated_udp_ports.clear()
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log.info("VPCS module has been reset")
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@IModule.route("vpcs.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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- path (path to vpcs)
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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 "path" in request and request["path"]:
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self._vpcs = request["path"]
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log.info("VPCS path set to {}".format(self._vpcs))
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for vpcs_id in self._vpcs_instances:
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vpcs_instance = self._vpcs_instances[vpcs_id]
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vpcs_instance.path = self._vpcs
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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 vpcs_id in self._vpcs_instances:
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vpcs_instance = self._vpcs_instances[vpcs_id]
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vpcs_instance.working_dir = os.path.join(self._working_dir, "vpcs", "pc-{}".format(vpcs_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("vpcs.create")
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def vpcs_create(self, request):
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"""
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Creates a new VPCS instance.
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Mandatory request parameters:
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- name (VPCS name)
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Optional request parameters:
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- console (VPCS console port)
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Response parameters:
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- id (VPCS instance identifier)
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- name (VPCS 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, VPCS_CREATE_SCHEMA):
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return
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name = request["name"]
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console = request.get("console")
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vpcs_id = request.get("vpcs_id")
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try:
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if not self._vpcs:
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raise VPCSError("No path to a VPCS executable has been set")
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vpcs_instance = VPCSDevice(name,
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self._vpcs,
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self._working_dir,
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self._host,
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vpcs_id,
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console,
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self._console_start_port_range,
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self._console_end_port_range)
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except VPCSError as e:
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self.send_custom_error(str(e))
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return
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response = {"name": vpcs_instance.name,
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"id": vpcs_instance.id}
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defaults = vpcs_instance.defaults()
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response.update(defaults)
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self._vpcs_instances[vpcs_instance.id] = vpcs_instance
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self.send_response(response)
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@IModule.route("vpcs.delete")
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def vpcs_delete(self, request):
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"""
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Deletes a VPCS instance.
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Mandatory request parameters:
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- id (VPCS 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, VPCS_DELETE_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_instance:
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return
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try:
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vpcs_instance.clean_delete()
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del self._vpcs_instances[request["id"]]
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except VPCSError 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("vpcs.update")
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def vpcs_update(self, request):
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"""
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Updates a VPCS instance
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Mandatory request parameters:
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- id (VPCS instance identifier)
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Optional request parameters:
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- any setting to update
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- script_file_base64 (base64 encoded)
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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, VPCS_UPDATE_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_instance:
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return
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config_path = os.path.join(vpcs_instance.working_dir, "startup.vpc")
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try:
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if "script_file_base64" in request:
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# a new startup-config has been pushed
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config = base64.decodebytes(request["script_file_base64"].encode("utf-8")).decode("utf-8")
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config = config.replace("\r", "")
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config = config.replace('%h', vpcs_instance.name)
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try:
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with open(config_path, "w") as f:
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log.info("saving script file to {}".format(config_path))
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f.write(config)
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except OSError as e:
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raise VPCSError("Could not save the configuration {}: {}".format(config_path, e))
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# update the request with the new local startup-config path
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request["script_file"] = os.path.basename(config_path)
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elif "script_file" in request:
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if os.path.isfile(request["script_file"]) and request["script_file"] != config_path:
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# this is a local file set in the GUI
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try:
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with open(request["script_file"], "r", errors="replace") as f:
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config = f.read()
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with open(config_path, "w") as f:
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config = config.replace("\r", "")
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config = config.replace('%h', vpcs_instance.name)
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f.write(config)
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request["script_file"] = os.path.basename(config_path)
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except OSError as e:
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raise VPCSError("Could not save the configuration from {} to {}: {}".format(request["script_file"], config_path, e))
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elif not os.path.isfile(config_path):
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raise VPCSError("Startup-config {} could not be found on this server".format(request["script_file"]))
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except VPCSError as e:
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self.send_custom_error(str(e))
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return
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# update the VPCS settings
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response = {}
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for name, value in request.items():
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if hasattr(vpcs_instance, name) and getattr(vpcs_instance, name) != value:
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try:
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setattr(vpcs_instance, name, value)
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response[name] = value
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except VPCSError 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("vpcs.start")
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def vm_start(self, request):
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"""
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Starts a VPCS instance.
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Mandatory request parameters:
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- id (VPCS 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, VPCS_START_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_instance:
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return
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try:
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vpcs_instance.start()
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except VPCSError 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("vpcs.stop")
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def vm_stop(self, request):
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"""
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Stops a VPCS instance.
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Mandatory request parameters:
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- id (VPCS 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, VPCS_STOP_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_instance:
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return
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try:
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vpcs_instance.stop()
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except VPCSError 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("vpcs.reload")
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def vm_reload(self, request):
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"""
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Reloads a VPCS instance.
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Mandatory request parameters:
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- id (VPCS 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, VPCS_RELOAD_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_instance:
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return
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try:
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if vpcs_instance.is_running():
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vpcs_instance.stop()
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vpcs_instance.start()
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except VPCSError 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("vpcs.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 (VPCS 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, VPCS_ALLOCATE_UDP_PORT_SCHEMA):
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return
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# get the instance
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vpcs_instance = self.get_vpcs_instance(request["id"])
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if not vpcs_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(vpcs_instance.name,
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vpcs_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("vpcs.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 VPCS instance.
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Mandatory request parameters:
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- id (VPCS 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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- type "nio_tap"
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- tap_device (TAP device name e.g. tap0)
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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, VPCS_ADD_NIO_SCHEMA):
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return
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# get the instance
|
|
vpcs_instance = self.get_vpcs_instance(request["id"])
|
|
if not vpcs_instance:
|
|
return
|
|
|
|
port = request["port"]
|
|
try:
|
|
nio = None
|
|
if request["nio"]["type"] == "nio_udp":
|
|
lport = request["nio"]["lport"]
|
|
rhost = request["nio"]["rhost"]
|
|
rport = request["nio"]["rport"]
|
|
try:
|
|
#TODO: handle IPv6
|
|
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
|
|
sock.connect((rhost, rport))
|
|
except OSError as e:
|
|
raise VPCSError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
|
|
nio = NIO_UDP(lport, rhost, rport)
|
|
elif request["nio"]["type"] == "nio_tap":
|
|
tap_device = request["nio"]["tap_device"]
|
|
if not self.has_privileged_access(self._vpcs):
|
|
raise VPCSError("{} has no privileged access to {}.".format(self._vpcs, tap_device))
|
|
nio = NIO_TAP(tap_device)
|
|
if not nio:
|
|
raise VPCSError("Requested NIO does not exist or is not supported: {}".format(request["nio"]["type"]))
|
|
except VPCSError as e:
|
|
self.send_custom_error(str(e))
|
|
return
|
|
|
|
try:
|
|
vpcs_instance.port_add_nio_binding(port, nio)
|
|
except VPCSError as e:
|
|
self.send_custom_error(str(e))
|
|
return
|
|
|
|
self.send_response({"port_id": request["port_id"]})
|
|
|
|
@IModule.route("vpcs.delete_nio")
|
|
def delete_nio(self, request):
|
|
"""
|
|
Deletes an NIO (Network Input/Output).
|
|
|
|
Mandatory request parameters:
|
|
- id (VPCS instance identifier)
|
|
- port (port identifier)
|
|
|
|
Response parameters:
|
|
- True on success
|
|
|
|
:param request: JSON request
|
|
"""
|
|
|
|
# validate the request
|
|
if not self.validate_request(request, VPCS_DELETE_NIO_SCHEMA):
|
|
return
|
|
|
|
# get the instance
|
|
vpcs_instance = self.get_vpcs_instance(request["id"])
|
|
if not vpcs_instance:
|
|
return
|
|
|
|
port = request["port"]
|
|
try:
|
|
nio = vpcs_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 VPCSError as e:
|
|
self.send_custom_error(str(e))
|
|
return
|
|
|
|
self.send_response(True)
|
|
|
|
@IModule.route("vpcs.export_config")
|
|
def export_config(self, request):
|
|
"""
|
|
Exports the script file from a VPCS instance.
|
|
|
|
Mandatory request parameters:
|
|
- id (vm identifier)
|
|
|
|
Response parameters:
|
|
- script_file_base64 (script file base64 encoded)
|
|
- False if no configuration can be exported
|
|
"""
|
|
|
|
# validate the request
|
|
if not self.validate_request(request, VPCS_EXPORT_CONFIG_SCHEMA):
|
|
return
|
|
|
|
# get the instance
|
|
vpcs_instance = self.get_vpcs_instance(request["id"])
|
|
if not vpcs_instance:
|
|
return
|
|
|
|
response = {}
|
|
script_file_path = os.path.join(vpcs_instance.working_dir, vpcs_instance.script_file)
|
|
try:
|
|
with open(script_file_path, "rb") as f:
|
|
config = f.read()
|
|
response["script_file_base64"] = base64.encodebytes(config).decode("utf-8")
|
|
except OSError as e:
|
|
self.send_custom_error("unable to export the script file: {}".format(e))
|
|
return
|
|
|
|
if not response:
|
|
self.send_response(False)
|
|
else:
|
|
self.send_response(response)
|
|
|
|
@IModule.route("vpcs.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)
|