mirror of
https://github.com/GNS3/gns3-server
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735 lines
28 KiB
Python
735 lines
28 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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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Dynamips server module.
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"""
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import aiohttp
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import sys
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import os
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import shutil
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import socket
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import time
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import asyncio
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import tempfile
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import logging
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import glob
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log = logging.getLogger(__name__)
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from gns3server.utils.interfaces import get_windows_interfaces, is_interface_up
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from gns3server.utils.asyncio import wait_run_in_executor
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from pkg_resources import parse_version
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from uuid import UUID, uuid4
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from ..base_manager import BaseManager
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from ..project_manager import ProjectManager
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from ..port_manager import PortManager
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from .dynamips_error import DynamipsError
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from .hypervisor import Hypervisor
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from .nodes.router import Router
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from .dynamips_vm import DynamipsVM
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from .dynamips_device import DynamipsDevice
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# NIOs
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from .nios.nio_udp import NIOUDP
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from .nios.nio_unix import NIOUNIX
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from .nios.nio_vde import NIOVDE
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from .nios.nio_tap import NIOTAP
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from .nios.nio_generic_ethernet import NIOGenericEthernet
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from .nios.nio_linux_ethernet import NIOLinuxEthernet
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from .nios.nio_null import NIONull
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# Adapters
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from .adapters.c7200_io_2fe import C7200_IO_2FE
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from .adapters.c7200_io_fe import C7200_IO_FE
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from .adapters.c7200_io_ge_e import C7200_IO_GE_E
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from .adapters.nm_16esw import NM_16ESW
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from .adapters.nm_1e import NM_1E
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from .adapters.nm_1fe_tx import NM_1FE_TX
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from .adapters.nm_4e import NM_4E
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from .adapters.nm_4t import NM_4T
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from .adapters.pa_2fe_tx import PA_2FE_TX
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from .adapters.pa_4e import PA_4E
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from .adapters.pa_4t import PA_4T
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from .adapters.pa_8e import PA_8E
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from .adapters.pa_8t import PA_8T
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from .adapters.pa_a1 import PA_A1
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from .adapters.pa_fe_tx import PA_FE_TX
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from .adapters.pa_ge import PA_GE
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from .adapters.pa_pos_oc3 import PA_POS_OC3
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from .adapters.wic_1enet import WIC_1ENET
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from .adapters.wic_1t import WIC_1T
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from .adapters.wic_2t import WIC_2T
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ADAPTER_MATRIX = {"C7200-IO-2FE": C7200_IO_2FE,
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"C7200-IO-FE": C7200_IO_FE,
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"C7200-IO-GE-E": C7200_IO_GE_E,
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"NM-16ESW": NM_16ESW,
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"NM-1E": NM_1E,
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"NM-1FE-TX": NM_1FE_TX,
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"NM-4E": NM_4E,
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"NM-4T": NM_4T,
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"PA-2FE-TX": PA_2FE_TX,
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"PA-4E": PA_4E,
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"PA-4T+": PA_4T,
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"PA-8E": PA_8E,
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"PA-8T": PA_8T,
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"PA-A1": PA_A1,
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"PA-FE-TX": PA_FE_TX,
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"PA-GE": PA_GE,
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"PA-POS-OC3": PA_POS_OC3}
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WIC_MATRIX = {"WIC-1ENET": WIC_1ENET,
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"WIC-1T": WIC_1T,
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"WIC-2T": WIC_2T}
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class Dynamips(BaseManager):
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_VM_CLASS = DynamipsVM
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_DEVICE_CLASS = DynamipsDevice
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_ghost_ios_lock = None
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def __init__(self):
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super().__init__()
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Dynamips._ghost_ios_lock = asyncio.Lock()
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self._devices = {}
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self._ghost_files = set()
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self._dynamips_path = None
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self._dynamips_ids = {}
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def get_dynamips_id(self, project_id):
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"""
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:param project_id: UUID of the project
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:returns: a free dynamips id
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"""
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self._dynamips_ids.setdefault(project_id, set())
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dynamips_id = 0
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for dynamips_id in range(1, 4097):
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if dynamips_id not in self._dynamips_ids[project_id]:
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self._dynamips_ids[project_id].add(dynamips_id)
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return dynamips_id
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raise DynamipsError("Maximum number of Dynamips instances reached")
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def take_dynamips_id(self, project_id, dynamips_id):
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"""
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Reserve a dynamips id or raise an error
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:param project_id: UUID of the project
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:param dynamips_id: Asked id
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"""
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self._dynamips_ids.setdefault(project_id, set())
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if dynamips_id in self._dynamips_ids[project_id]:
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raise DynamipsError("Dynamips identifier {} is already used by another router".format(dynamips_id))
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self._dynamips_ids[project_id].add(dynamips_id)
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def release_dynamips_id(self, project_id, dynamips_id):
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"""
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A dynamips id can be reused by another vm
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:param project_id: UUID of the project
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:param dynamips_id: Asked id
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"""
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self._dynamips_ids.setdefault(project_id, set())
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if dynamips_id in self._dynamips_ids[project_id]:
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self._dynamips_ids[project_id].remove(dynamips_id)
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@asyncio.coroutine
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def unload(self):
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yield from BaseManager.unload(self)
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tasks = []
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for device in self._devices.values():
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tasks.append(asyncio.async(device.hypervisor.stop()))
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if tasks:
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done, _ = yield from asyncio.wait(tasks)
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for future in done:
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try:
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future.result()
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except (Exception, GeneratorExit) as e:
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log.error("Could not stop device hypervisor {}".format(e), exc_info=1)
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continue
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@asyncio.coroutine
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def project_closing(self, project):
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"""
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Called when a project is about to be closed.
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:param project: Project instance
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"""
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yield from super().project_closing(project)
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# delete the Dynamips devices corresponding to the project
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tasks = []
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for device in self._devices.values():
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if device.project.id == project.id:
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tasks.append(asyncio.async(device.delete()))
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if tasks:
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done, _ = yield from asyncio.wait(tasks)
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for future in done:
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try:
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future.result()
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except (Exception, GeneratorExit) as e:
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log.error("Could not delete device {}".format(e), exc_info=1)
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@asyncio.coroutine
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def project_closed(self, project):
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"""
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Called when a project is closed.
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:param project: Project instance
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"""
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yield from super().project_closed(project)
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# delete useless Dynamips files
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project_dir = project.module_working_path(self.module_name.lower())
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files = glob.glob(os.path.join(glob.escape(project_dir), "*.ghost"))
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files += glob.glob(os.path.join(glob.escape(project_dir), "*_lock"))
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files += glob.glob(os.path.join(glob.escape(project_dir), "ilt_*"))
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files += glob.glob(os.path.join(glob.escape(project_dir), "c[0-9][0-9][0-9][0-9]_i[0-9]*_rommon_vars"))
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files += glob.glob(os.path.join(glob.escape(project_dir), "c[0-9][0-9][0-9][0-9]_i[0-9]*_log.txt"))
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for file in files:
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try:
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log.debug("Deleting file {}".format(file))
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if file in self._ghost_files:
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self._ghost_files.remove(file)
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yield from wait_run_in_executor(os.remove, file)
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except OSError as e:
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log.warn("Could not delete file {}: {}".format(file, e))
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continue
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# Release the dynamips ids if we want to reload the same project
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# later
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if project.id in self._dynamips_ids:
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del self._dynamips_ids[project.id]
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@asyncio.coroutine
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def project_moved(self, project):
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"""
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Called when a project is moved.
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:param project: Project instance
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"""
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for vm in self._vms.values():
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if vm.project.id == project.id:
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yield from vm.hypervisor.set_working_dir(project.module_working_directory(self.module_name.lower()))
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for device in self._devices.values():
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if device.project.id == project.id:
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yield from device.hypervisor.set_working_dir(project.module_working_directory(self.module_name.lower()))
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@asyncio.coroutine
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def project_committed(self, project):
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"""
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Called when a project has been committed.
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:param project: Project instance
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"""
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# save the configs when the project is committed
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for vm in self._vms.copy().values():
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if vm.project.id == project.id:
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try:
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yield from vm.save_configs()
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except DynamipsError as e:
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log.warning(e)
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continue
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@property
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def dynamips_path(self):
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"""
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Returns the path to Dynamips.
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:returns: path
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"""
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return self._dynamips_path
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@asyncio.coroutine
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def create_device(self, name, project_id, device_id, device_type, *args, **kwargs):
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"""
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Create a new Dynamips device.
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:param name: Device name
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:param project_id: Project identifier
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:param vm_id: restore a VM identifier
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"""
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project = ProjectManager.instance().get_project(project_id)
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if device_id and isinstance(device_id, int):
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with (yield from BaseManager._convert_lock):
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device_id = yield from self.convert_old_project(project, device_id, name)
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if not device_id:
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device_id = str(uuid4())
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device = self._DEVICE_CLASS(name, device_id, project, self, device_type, *args, **kwargs)
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yield from device.create()
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self._devices[device.id] = device
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return device
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def get_device(self, device_id, project_id=None):
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"""
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Returns a device instance.
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:param device_id: Device identifier
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:param project_id: Project identifier
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:returns: Device instance
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"""
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if project_id:
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# check the project_id exists
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project = ProjectManager.instance().get_project(project_id)
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try:
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UUID(device_id, version=4)
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except ValueError:
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raise aiohttp.web.HTTPBadRequest(text="Device ID} is not a valid UUID".format(device_id))
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if device_id not in self._devices:
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raise aiohttp.web.HTTPNotFound(text="Device ID {} doesn't exist".format(device_id))
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device = self._devices[device_id]
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if project_id:
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if device.project.id != project.id:
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raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't belong to device {}".format(project_id, device.name))
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return device
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@asyncio.coroutine
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def delete_device(self, device_id):
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"""
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Delete a device
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:param device_id: Device identifier
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:returns: Device instance
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"""
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device = self.get_device(device_id)
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yield from device.delete()
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del self._devices[device.id]
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return device
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def find_dynamips(self):
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# look for Dynamips
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dynamips_path = self.config.get_section_config("Dynamips").get("dynamips_path")
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if not dynamips_path:
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dynamips_path = shutil.which("dynamips")
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if not dynamips_path:
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raise DynamipsError("Could not find Dynamips")
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if not os.path.isfile(dynamips_path):
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raise DynamipsError("Dynamips {} is not accessible".format(dynamips_path))
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if not os.access(dynamips_path, os.X_OK):
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raise DynamipsError("Dynamips is not executable")
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self._dynamips_path = dynamips_path
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return dynamips_path
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@asyncio.coroutine
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def start_new_hypervisor(self, working_dir=None):
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"""
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Creates a new Dynamips process and start it.
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:param working_dir: working directory
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:returns: the new hypervisor instance
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"""
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if not self._dynamips_path:
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self.find_dynamips()
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if not working_dir:
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working_dir = tempfile.gettempdir()
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# FIXME: hypervisor should always listen to 127.0.0.1
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# See https://github.com/GNS3/dynamips/issues/62
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server_config = self.config.get_section_config("Server")
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server_host = server_config.get("host")
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try:
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info = socket.getaddrinfo(server_host, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
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if not info:
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raise DynamipsError("getaddrinfo returns an empty list on {}".format(server_host))
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for res in info:
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af, socktype, proto, _, sa = res
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# let the OS find an unused port for the Dynamips hypervisor
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with socket.socket(af, socktype, proto) as sock:
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sock.bind(sa)
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port = sock.getsockname()[1]
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break
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except OSError as e:
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raise DynamipsError("Could not find free port for the Dynamips hypervisor: {}".format(e))
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port_manager = PortManager.instance()
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hypervisor = Hypervisor(self._dynamips_path, working_dir, server_host, port, port_manager.console_host)
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log.info("Creating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, working_dir))
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yield from hypervisor.start()
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log.info("Hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port))
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yield from hypervisor.connect()
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if parse_version(hypervisor.version) < parse_version('0.2.11'):
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raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
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return hypervisor
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@asyncio.coroutine
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def ghost_ios_support(self, vm):
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ghost_ios_support = self.config.get_section_config("Dynamips").getboolean("ghost_ios_support", True)
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if ghost_ios_support:
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with (yield from Dynamips._ghost_ios_lock):
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try:
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yield from self._set_ghost_ios(vm)
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except GeneratorExit:
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log.warning("Could not create ghost IOS image {} (GeneratorExit)".format(vm.name))
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@asyncio.coroutine
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def create_nio(self, node, nio_settings):
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"""
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Creates a new NIO.
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:param node: Dynamips node instance
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:param nio_settings: information to create the NIO
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:returns: a NIO object
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"""
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nio = None
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if nio_settings["type"] == "nio_udp":
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lport = nio_settings["lport"]
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rhost = nio_settings["rhost"]
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rport = nio_settings["rport"]
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try:
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info = socket.getaddrinfo(rhost, rport, socket.AF_UNSPEC, socket.SOCK_DGRAM, 0, socket.AI_PASSIVE)
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if not info:
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raise DynamipsError("getaddrinfo returns an empty list on {}:{}".format(rhost, rport))
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for res in info:
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af, socktype, proto, _, sa = res
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with socket.socket(af, socktype, proto) as sock:
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sock.connect(sa)
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except OSError as e:
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raise DynamipsError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
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nio = NIOUDP(node.hypervisor, lport, rhost, rport)
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elif nio_settings["type"] == "nio_generic_ethernet":
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ethernet_device = nio_settings["ethernet_device"]
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if sys.platform.startswith("win"):
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# replace the interface name by the GUID on Windows
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interfaces = get_windows_interfaces()
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npf_interface = None
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for interface in interfaces:
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if interface["name"] == ethernet_device:
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npf_interface = interface["id"]
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if not npf_interface:
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raise DynamipsError("Could not find interface {} on this host".format(ethernet_device))
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else:
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ethernet_device = npf_interface
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if not is_interface_up(ethernet_device):
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raise aiohttp.web.HTTPConflict(text="Ethernet interface {} is down".format(ethernet_device))
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nio = NIOGenericEthernet(node.hypervisor, ethernet_device)
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elif nio_settings["type"] == "nio_linux_ethernet":
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if sys.platform.startswith("win"):
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raise DynamipsError("This NIO type is not supported on Windows")
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ethernet_device = nio_settings["ethernet_device"]
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nio = NIOLinuxEthernet(node.hypervisor, ethernet_device)
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elif nio_settings["type"] == "nio_tap":
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tap_device = nio_settings["tap_device"]
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nio = NIOTAP(node.hypervisor, tap_device)
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if not is_interface_up(tap_device):
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# test after the TAP interface has been created (if it doesn't exist yet)
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raise aiohttp.web.HTTPConflict(text="TAP interface {} is down".format(tap_device))
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elif nio_settings["type"] == "nio_unix":
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local_file = nio_settings["local_file"]
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remote_file = nio_settings["remote_file"]
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nio = NIOUNIX(node.hypervisor, local_file, remote_file)
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elif nio_settings["type"] == "nio_vde":
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control_file = nio_settings["control_file"]
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local_file = nio_settings["local_file"]
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nio = NIOVDE(node.hypervisor, control_file, local_file)
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elif nio_settings["type"] == "nio_null":
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nio = NIONull(node.hypervisor)
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else:
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raise aiohttp.web.HTTPConflict(text="NIO of type {} is not supported".format(nio_settings["type"]))
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yield from nio.create()
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return nio
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||
@asyncio.coroutine
|
||
def _set_ghost_ios(self, vm):
|
||
"""
|
||
Manages Ghost IOS support.
|
||
|
||
:param vm: VM instance
|
||
"""
|
||
|
||
if not vm.mmap:
|
||
raise DynamipsError("mmap support is required to enable ghost IOS support")
|
||
|
||
if vm.platform == "c7200" and vm.npe == "npe-g2":
|
||
log.warning("Ghost IOS is not supported for c7200 with NPE-G2")
|
||
return
|
||
|
||
ghost_file = vm.formatted_ghost_file()
|
||
ghost_file_path = os.path.join(vm.hypervisor.working_dir, ghost_file)
|
||
if ghost_file_path not in self._ghost_files:
|
||
# create a new ghost IOS instance
|
||
ghost_id = str(uuid4())
|
||
ghost = Router("ghost-" + ghost_file, ghost_id, vm.project, vm.manager, platform=vm.platform, hypervisor=vm.hypervisor, ghost_flag=True)
|
||
try:
|
||
yield from ghost.create()
|
||
yield from ghost.set_image(vm.image)
|
||
yield from ghost.set_ghost_status(1)
|
||
yield from ghost.set_ghost_file(ghost_file)
|
||
yield from ghost.set_ram(vm.ram)
|
||
try:
|
||
yield from ghost.start()
|
||
yield from ghost.stop()
|
||
self._ghost_files.add(ghost_file_path)
|
||
except DynamipsError:
|
||
raise
|
||
finally:
|
||
yield from ghost.clean_delete()
|
||
except DynamipsError as e:
|
||
log.warn("Could not create ghost instance: {}".format(e))
|
||
|
||
if vm.ghost_file != ghost_file and os.path.isfile(ghost_file_path):
|
||
# set the ghost file to the router
|
||
yield from vm.set_ghost_status(2)
|
||
yield from vm.set_ghost_file(ghost_file)
|
||
|
||
@asyncio.coroutine
|
||
def update_vm_settings(self, vm, settings):
|
||
"""
|
||
Updates the VM settings.
|
||
|
||
:param vm: VM instance
|
||
:param settings: settings to update (dict)
|
||
"""
|
||
|
||
for name, value in settings.items():
|
||
if hasattr(vm, name) and getattr(vm, name) != value:
|
||
if hasattr(vm, "set_{}".format(name)):
|
||
setter = getattr(vm, "set_{}".format(name))
|
||
yield from setter(value)
|
||
elif name.startswith("slot") and value in ADAPTER_MATRIX:
|
||
slot_id = int(name[-1])
|
||
adapter_name = value
|
||
adapter = ADAPTER_MATRIX[adapter_name]()
|
||
try:
|
||
if vm.slots[slot_id] and not isinstance(vm.slots[slot_id], type(adapter)):
|
||
yield from vm.slot_remove_binding(slot_id)
|
||
if not isinstance(vm.slots[slot_id], type(adapter)):
|
||
yield from vm.slot_add_binding(slot_id, adapter)
|
||
except IndexError:
|
||
raise DynamipsError("Slot {} doesn't exist on this router".format(slot_id))
|
||
elif name.startswith("slot") and value is None:
|
||
slot_id = int(name[-1])
|
||
try:
|
||
if vm.slots[slot_id]:
|
||
yield from vm.slot_remove_binding(slot_id)
|
||
except IndexError:
|
||
raise DynamipsError("Slot {} doesn't exist on this router".format(slot_id))
|
||
elif name.startswith("wic") and value in WIC_MATRIX:
|
||
wic_slot_id = int(name[-1])
|
||
wic_name = value
|
||
wic = WIC_MATRIX[wic_name]()
|
||
try:
|
||
if vm.slots[0].wics[wic_slot_id] and not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
|
||
yield from vm.uninstall_wic(wic_slot_id)
|
||
if not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
|
||
yield from vm.install_wic(wic_slot_id, wic)
|
||
except IndexError:
|
||
raise DynamipsError("WIC slot {} doesn't exist on this router".format(wic_slot_id))
|
||
elif name.startswith("wic") and value is None:
|
||
wic_slot_id = int(name[-1])
|
||
try:
|
||
if vm.slots[0].wics and vm.slots[0].wics[wic_slot_id]:
|
||
yield from vm.uninstall_wic(wic_slot_id)
|
||
except IndexError:
|
||
raise DynamipsError("WIC slot {} doesn't exist on this router".format(wic_slot_id))
|
||
|
||
mmap_support = self.config.get_section_config("Dynamips").getboolean("mmap_support", True)
|
||
if mmap_support is False:
|
||
yield from vm.set_mmap(False)
|
||
|
||
sparse_memory_support = self.config.get_section_config("Dynamips").getboolean("sparse_memory_support", True)
|
||
if sparse_memory_support is False:
|
||
yield from vm.set_sparsemem(False)
|
||
|
||
# update the configs if needed
|
||
yield from self.set_vm_configs(vm, settings)
|
||
|
||
@asyncio.coroutine
|
||
def set_vm_configs(self, vm, settings):
|
||
"""
|
||
Set VM configs from pushed content or existing config files.
|
||
|
||
:param vm: VM instance
|
||
:param settings: VM settings
|
||
"""
|
||
|
||
module_workdir = vm.project.module_working_directory(self.module_name.lower())
|
||
default_startup_config_path = os.path.join(module_workdir, "configs", "i{}_startup-config.cfg".format(vm.dynamips_id))
|
||
default_private_config_path = os.path.join(module_workdir, "configs", "i{}_private-config.cfg".format(vm.dynamips_id))
|
||
|
||
startup_config_path = settings.get("startup_config")
|
||
startup_config_content = settings.get("startup_config_content")
|
||
if startup_config_path:
|
||
yield from vm.set_configs(startup_config_path)
|
||
elif startup_config_content:
|
||
startup_config_path = self._create_config(vm, default_startup_config_path, startup_config_content)
|
||
yield from vm.set_configs(startup_config_path)
|
||
# An empty startup config crash dynamips
|
||
else:
|
||
startup_config_path = self._create_config(vm, default_startup_config_path, "!\n")
|
||
yield from vm.set_configs(startup_config_path)
|
||
|
||
private_config_path = settings.get("private_config")
|
||
private_config_content = settings.get("private_config_content")
|
||
if private_config_path:
|
||
yield from vm.set_configs(vm.startup_config, private_config_path)
|
||
elif private_config_content:
|
||
private_config_path = self._create_config(vm, default_private_config_path, private_config_content)
|
||
yield from vm.set_configs(vm.startup_config, private_config_path)
|
||
|
||
def _create_config(self, vm, path, content=None):
|
||
"""
|
||
Creates a config file.
|
||
|
||
:param vm: VM instance
|
||
:param path: path to the destination config file
|
||
:param content: config content
|
||
|
||
:returns: relative path to the created config file
|
||
"""
|
||
|
||
log.info("Creating config file {}".format(path))
|
||
config_dir = os.path.dirname(path)
|
||
try:
|
||
os.makedirs(config_dir, exist_ok=True)
|
||
except OSError as e:
|
||
raise DynamipsError("Could not create Dynamips configs directory: {}".format(e))
|
||
|
||
try:
|
||
with open(path, "wb") as f:
|
||
if content:
|
||
content = "!\n" + content.replace("\r", "")
|
||
content = content.replace('%h', vm.name)
|
||
f.write(content.encode("utf-8"))
|
||
except OSError as e:
|
||
raise DynamipsError("Could not create config file {}: {}".format(path, e))
|
||
|
||
return os.path.join("configs", os.path.basename(path))
|
||
|
||
@asyncio.coroutine
|
||
def auto_idlepc(self, vm):
|
||
"""
|
||
Try to find the best possible idle-pc value.
|
||
|
||
:param vm: VM instance
|
||
"""
|
||
|
||
yield from vm.set_idlepc("0x0")
|
||
was_auto_started = False
|
||
try:
|
||
status = yield from vm.get_status()
|
||
if status != "running":
|
||
yield from vm.start()
|
||
was_auto_started = True
|
||
yield from asyncio.sleep(20) # leave time to the router to boot
|
||
validated_idlepc = None
|
||
idlepcs = yield from vm.get_idle_pc_prop()
|
||
if not idlepcs:
|
||
raise DynamipsError("No Idle-PC values found")
|
||
|
||
for idlepc in idlepcs:
|
||
yield from vm.set_idlepc(idlepc.split()[0])
|
||
log.debug("Auto Idle-PC: trying idle-PC value {}".format(vm.idlepc))
|
||
start_time = time.time()
|
||
initial_cpu_usage = yield from vm.get_cpu_usage()
|
||
log.debug("Auto Idle-PC: initial CPU usage is {}%".format(initial_cpu_usage))
|
||
yield from asyncio.sleep(3) # wait 3 seconds to probe the cpu again
|
||
elapsed_time = time.time() - start_time
|
||
cpu_usage = yield from vm.get_cpu_usage()
|
||
cpu_elapsed_usage = cpu_usage - initial_cpu_usage
|
||
cpu_usage = abs(cpu_elapsed_usage * 100.0 / elapsed_time)
|
||
if cpu_usage > 100:
|
||
cpu_usage = 100
|
||
log.debug("Auto Idle-PC: CPU usage is {}% after {:.2} seconds".format(cpu_usage, elapsed_time))
|
||
if cpu_usage < 70:
|
||
validated_idlepc = vm.idlepc
|
||
log.debug("Auto Idle-PC: idle-PC value {} has been validated".format(validated_idlepc))
|
||
break
|
||
|
||
if validated_idlepc is None:
|
||
raise DynamipsError("Sorry, no idle-pc value was suitable")
|
||
|
||
except DynamipsError:
|
||
raise
|
||
finally:
|
||
if was_auto_started:
|
||
yield from vm.stop()
|
||
return validated_idlepc
|
||
|
||
def get_images_directory(self):
|
||
"""
|
||
Return the full path of the images directory on disk
|
||
"""
|
||
return os.path.join(os.path.expanduser(self.config.get_section_config("Server").get("images_path", "~/GNS3/images")), "IOS")
|
||
|
||
@asyncio.coroutine
|
||
def list_images(self):
|
||
"""
|
||
Return the list of available IOS images.
|
||
|
||
:returns: Array of hash
|
||
"""
|
||
|
||
image_dir = self.get_images_directory()
|
||
if not os.path.exists(image_dir):
|
||
return []
|
||
try:
|
||
files = os.listdir(image_dir)
|
||
except OSError as e:
|
||
raise DynamipsError("Can not list {}: {}".format(image_dir, str(e)))
|
||
files.sort()
|
||
images = []
|
||
for filename in files:
|
||
if filename[0] != "." and not filename.endswith(".md5sum"):
|
||
try:
|
||
path = os.path.join(image_dir, filename)
|
||
with open(path, "rb") as f:
|
||
# read the first 7 bytes of the file.
|
||
elf_header_start = f.read(7)
|
||
except OSError as e:
|
||
continue
|
||
# valid IOS images must start with the ELF magic number, be 32-bit, big endian and have an ELF version of 1
|
||
if elf_header_start == b'\x7fELF\x01\x02\x01':
|
||
path = os.path.relpath(path, image_dir)
|
||
images.append({"filename": filename, "path": path})
|
||
return images
|