mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-16 05:18:56 +00:00
490 lines
17 KiB
Python
490 lines
17 KiB
Python
# -*- coding: utf-8 -*-
|
||
#
|
||
# Copyright (C) 2015 GNS3 Technologies Inc.
|
||
#
|
||
# This program is free software: you can redistribute it and/or modify
|
||
# it under the terms of the GNU General Public License as published by
|
||
# the Free Software Foundation, either version 3 of the License, or
|
||
# (at your option) any later version.
|
||
#
|
||
# This program is distributed in the hope that it will be useful,
|
||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
# GNU General Public License for more details.
|
||
#
|
||
# You should have received a copy of the GNU General Public License
|
||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
import sys
|
||
import os
|
||
import struct
|
||
import stat
|
||
import asyncio
|
||
import aiohttp
|
||
import socket
|
||
import shutil
|
||
|
||
import logging
|
||
log = logging.getLogger(__name__)
|
||
|
||
from uuid import UUID, uuid4
|
||
from gns3server.utils.interfaces import is_interface_up
|
||
from ..config import Config
|
||
from ..utils.asyncio import wait_run_in_executor
|
||
from ..utils import force_unix_path
|
||
from .project_manager import ProjectManager
|
||
|
||
from .nios.nio_udp import NIOUDP
|
||
from .nios.nio_tap import NIOTAP
|
||
from .nios.nio_nat import NIONAT
|
||
from .nios.nio_generic_ethernet import NIOGenericEthernet
|
||
from ..utils.images import md5sum, remove_checksum
|
||
from .vm_error import VMError
|
||
|
||
|
||
class BaseManager:
|
||
|
||
"""
|
||
Base class for all Manager classes.
|
||
Responsible of management of a VM pool of the same type.
|
||
"""
|
||
|
||
_convert_lock = None
|
||
|
||
def __init__(self):
|
||
|
||
BaseManager._convert_lock = asyncio.Lock()
|
||
self._vms = {}
|
||
self._port_manager = None
|
||
self._config = Config.instance()
|
||
|
||
@classmethod
|
||
def instance(cls):
|
||
"""
|
||
Singleton to return only one instance of BaseManager.
|
||
|
||
:returns: instance of BaseManager
|
||
"""
|
||
|
||
if not hasattr(cls, "_instance") or cls._instance is None:
|
||
cls._instance = cls()
|
||
return cls._instance
|
||
|
||
@property
|
||
def module_name(self):
|
||
"""
|
||
Returns the module name.
|
||
|
||
:returns: module name
|
||
"""
|
||
|
||
return self.__class__.__name__
|
||
|
||
@property
|
||
def port_manager(self):
|
||
"""
|
||
Returns the port manager.
|
||
|
||
:returns: Port manager
|
||
"""
|
||
|
||
return self._port_manager
|
||
|
||
@port_manager.setter
|
||
def port_manager(self, new_port_manager):
|
||
|
||
self._port_manager = new_port_manager
|
||
|
||
@property
|
||
def config(self):
|
||
"""
|
||
Returns the server config.
|
||
|
||
:returns: Config
|
||
"""
|
||
|
||
return self._config
|
||
|
||
@asyncio.coroutine
|
||
def unload(self):
|
||
|
||
tasks = []
|
||
for vm_id in self._vms.keys():
|
||
tasks.append(asyncio.async(self.close_vm(vm_id)))
|
||
|
||
if tasks:
|
||
done, _ = yield from asyncio.wait(tasks)
|
||
for future in done:
|
||
try:
|
||
future.result()
|
||
except (Exception, GeneratorExit) as e:
|
||
log.error("Could not close VM {}".format(e), exc_info=1)
|
||
continue
|
||
|
||
if hasattr(BaseManager, "_instance"):
|
||
BaseManager._instance = None
|
||
log.debug("Module {} unloaded".format(self.module_name))
|
||
|
||
def get_vm(self, vm_id, project_id=None):
|
||
"""
|
||
Returns a VM instance.
|
||
|
||
:param vm_id: VM identifier
|
||
:param project_id: Project identifier
|
||
|
||
:returns: VM instance
|
||
"""
|
||
|
||
if project_id:
|
||
# check the project_id exists
|
||
project = ProjectManager.instance().get_project(project_id)
|
||
|
||
try:
|
||
UUID(vm_id, version=4)
|
||
except ValueError:
|
||
raise aiohttp.web.HTTPBadRequest(text="VM ID {} is not a valid UUID".format(vm_id))
|
||
|
||
if vm_id not in self._vms:
|
||
raise aiohttp.web.HTTPNotFound(text="VM ID {} doesn't exist".format(vm_id))
|
||
|
||
vm = self._vms[vm_id]
|
||
if project_id:
|
||
if vm.project.id != project.id:
|
||
raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't belong to VM {}".format(project_id, vm.name))
|
||
|
||
return vm
|
||
|
||
@asyncio.coroutine
|
||
def convert_old_project(self, project, legacy_id, name):
|
||
"""
|
||
Convert projects made before version 1.3
|
||
|
||
:param project: Project instance
|
||
:param legacy_id: old identifier
|
||
:param name: node name
|
||
|
||
:returns: new identifier
|
||
"""
|
||
|
||
new_id = str(uuid4())
|
||
legacy_project_files_path = os.path.join(project.path, "{}-files".format(project.name))
|
||
new_project_files_path = os.path.join(project.path, "project-files")
|
||
if os.path.exists(legacy_project_files_path) and not os.path.exists(new_project_files_path):
|
||
# move the project files
|
||
log.info("Converting old project...")
|
||
try:
|
||
log.info('Moving "{}" to "{}"'.format(legacy_project_files_path, new_project_files_path))
|
||
yield from wait_run_in_executor(shutil.move, legacy_project_files_path, new_project_files_path)
|
||
except OSError as e:
|
||
raise aiohttp.web.HTTPInternalServerError(text="Could not move project files directory: {} to {} {}".format(legacy_project_files_path,
|
||
new_project_files_path, e))
|
||
|
||
if project.is_local() is False:
|
||
legacy_remote_project_path = os.path.join(project.location, project.name, self.module_name.lower())
|
||
new_remote_project_path = os.path.join(project.path, "project-files", self.module_name.lower())
|
||
if os.path.exists(legacy_remote_project_path) and not os.path.exists(new_remote_project_path):
|
||
# move the legacy remote project (remote servers only)
|
||
log.info("Converting old remote project...")
|
||
try:
|
||
log.info('Moving "{}" to "{}"'.format(legacy_remote_project_path, new_remote_project_path))
|
||
yield from wait_run_in_executor(shutil.move, legacy_remote_project_path, new_remote_project_path)
|
||
except OSError as e:
|
||
raise aiohttp.web.HTTPInternalServerError(text="Could not move directory: {} to {} {}".format(legacy_remote_project_path,
|
||
new_remote_project_path, e))
|
||
|
||
if hasattr(self, "get_legacy_vm_workdir"):
|
||
# rename old project VM working dir
|
||
log.info("Converting old VM working directory...")
|
||
legacy_vm_dir = self.get_legacy_vm_workdir(legacy_id, name)
|
||
legacy_vm_working_path = os.path.join(new_project_files_path, legacy_vm_dir)
|
||
new_vm_working_path = os.path.join(new_project_files_path, self.module_name.lower(), new_id)
|
||
if os.path.exists(legacy_vm_working_path) and not os.path.exists(new_vm_working_path):
|
||
try:
|
||
log.info('Moving "{}" to "{}"'.format(legacy_vm_working_path, new_vm_working_path))
|
||
yield from wait_run_in_executor(shutil.move, legacy_vm_working_path, new_vm_working_path)
|
||
except OSError as e:
|
||
raise aiohttp.web.HTTPInternalServerError(text="Could not move VM working directory: {} to {} {}".format(legacy_vm_working_path,
|
||
new_vm_working_path, e))
|
||
|
||
return new_id
|
||
|
||
@asyncio.coroutine
|
||
def create_vm(self, name, project_id, vm_id, *args, **kwargs):
|
||
"""
|
||
Create a new VM
|
||
|
||
:param name: VM name
|
||
:param project_id: Project identifier
|
||
:param vm_id: restore a VM identifier
|
||
"""
|
||
|
||
if vm_id in self._vms:
|
||
return self._vms[vm_id]
|
||
|
||
project = ProjectManager.instance().get_project(project_id)
|
||
if vm_id and isinstance(vm_id, int):
|
||
with (yield from BaseManager._convert_lock):
|
||
vm_id = yield from self.convert_old_project(project, vm_id, name)
|
||
|
||
if not vm_id:
|
||
vm_id = str(uuid4())
|
||
|
||
vm = self._VM_CLASS(name, vm_id, project, self, *args, **kwargs)
|
||
if asyncio.iscoroutinefunction(vm.create):
|
||
yield from vm.create()
|
||
else:
|
||
vm.create()
|
||
self._vms[vm.id] = vm
|
||
project.add_vm(vm)
|
||
return vm
|
||
|
||
@asyncio.coroutine
|
||
def close_vm(self, vm_id):
|
||
"""
|
||
Close a VM
|
||
|
||
:param vm_id: VM identifier
|
||
|
||
:returns: VM instance
|
||
"""
|
||
|
||
vm = self.get_vm(vm_id)
|
||
if asyncio.iscoroutinefunction(vm.close):
|
||
yield from vm.close()
|
||
else:
|
||
vm.close()
|
||
return vm
|
||
|
||
@asyncio.coroutine
|
||
def project_closing(self, project):
|
||
"""
|
||
Called when a project is about to be closed.
|
||
|
||
:param project: Project instance
|
||
"""
|
||
|
||
pass
|
||
|
||
@asyncio.coroutine
|
||
def project_closed(self, project):
|
||
"""
|
||
Called when a project is closed.
|
||
|
||
:param project: Project instance
|
||
"""
|
||
|
||
for vm in project.vms:
|
||
if vm.id in self._vms:
|
||
del self._vms[vm.id]
|
||
|
||
@asyncio.coroutine
|
||
def project_moved(self, project):
|
||
"""
|
||
Called when a project is moved
|
||
|
||
:param project: project instance
|
||
"""
|
||
|
||
pass
|
||
|
||
@asyncio.coroutine
|
||
def project_committed(self, project):
|
||
"""
|
||
Called when a project is committed.
|
||
|
||
:param project: Project instance
|
||
"""
|
||
|
||
pass
|
||
|
||
@asyncio.coroutine
|
||
def delete_vm(self, vm_id):
|
||
"""
|
||
Delete a VM. VM working directory will be destroy when
|
||
we receive a commit.
|
||
|
||
:param vm_id: VM identifier
|
||
:returns: VM instance
|
||
"""
|
||
|
||
vm = yield from self.close_vm(vm_id)
|
||
vm.project.mark_vm_for_destruction(vm)
|
||
if vm.id in self._vms:
|
||
del self._vms[vm.id]
|
||
return vm
|
||
|
||
@staticmethod
|
||
def has_privileged_access(executable):
|
||
"""
|
||
Check if an executable can access Ethernet and TAP devices in
|
||
RAW mode.
|
||
|
||
:param executable: executable path
|
||
|
||
:returns: True or False
|
||
"""
|
||
|
||
if sys.platform.startswith("win"):
|
||
# do not check anything on Windows
|
||
return True
|
||
|
||
if os.geteuid() == 0:
|
||
# we are root, so we should have privileged access.
|
||
return True
|
||
|
||
if os.stat(executable).st_uid == 0 and (os.stat(executable).st_mode & stat.S_ISUID or os.stat(executable).st_mode & stat.S_ISGID):
|
||
# the executable has set UID bit.
|
||
return True
|
||
|
||
# test if the executable has the CAP_NET_RAW capability (Linux only)
|
||
try:
|
||
if sys.platform.startswith("linux") and "security.capability" in os.listxattr(executable):
|
||
caps = os.getxattr(executable, "security.capability")
|
||
# test the 2nd byte and check if the 13th bit (CAP_NET_RAW) is set
|
||
if struct.unpack("<IIIII", caps)[1] & 1 << 13:
|
||
return True
|
||
except OSError as e:
|
||
log.error("could not determine if CAP_NET_RAW capability is set for {}: {}".format(executable, e))
|
||
|
||
return False
|
||
|
||
def create_nio(self, executable, nio_settings):
|
||
"""
|
||
Creates a new NIO.
|
||
|
||
:param nio_settings: information to create the NIO
|
||
|
||
:returns: a NIO object
|
||
"""
|
||
|
||
nio = None
|
||
if nio_settings["type"] == "nio_udp":
|
||
lport = nio_settings["lport"]
|
||
rhost = nio_settings["rhost"]
|
||
rport = nio_settings["rport"]
|
||
try:
|
||
info = socket.getaddrinfo(rhost, rport, socket.AF_UNSPEC, socket.SOCK_DGRAM, 0, socket.AI_PASSIVE)
|
||
if not info:
|
||
raise aiohttp.web.HTTPInternalServerError(text="getaddrinfo returns an empty list on {}:{}".format(rhost, rport))
|
||
for res in info:
|
||
af, socktype, proto, _, sa = res
|
||
with socket.socket(af, socktype, proto) as sock:
|
||
sock.connect(sa)
|
||
except OSError as e:
|
||
raise aiohttp.web.HTTPInternalServerError(text="Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
|
||
nio = NIOUDP(lport, rhost, rport)
|
||
elif nio_settings["type"] == "nio_tap":
|
||
tap_device = nio_settings["tap_device"]
|
||
# if not is_interface_up(tap_device):
|
||
# raise aiohttp.web.HTTPConflict(text="TAP interface {} does not exist or is down".format(tap_device))
|
||
# FIXME: check for permissions on tap device
|
||
# if not self.has_privileged_access(executable):
|
||
# raise aiohttp.web.HTTPForbidden(text="{} has no privileged access to {}.".format(executable, tap_device))
|
||
nio = NIOTAP(tap_device)
|
||
elif nio_settings["type"] == "nio_generic_ethernet":
|
||
ethernet_device = nio_settings["ethernet_device"]
|
||
if not is_interface_up(ethernet_device):
|
||
raise aiohttp.web.HTTPConflict(text="Ethernet interface {} does not exist or is down".format(ethernet_device))
|
||
nio = NIOGenericEthernet(ethernet_device)
|
||
elif nio_settings["type"] == "nio_nat":
|
||
nio = NIONAT()
|
||
assert nio is not None
|
||
return nio
|
||
|
||
def get_abs_image_path(self, path):
|
||
"""
|
||
Get the absolute path of an image
|
||
|
||
:param path: file path
|
||
:return: file path
|
||
"""
|
||
|
||
if not path:
|
||
return ""
|
||
img_directory = self.get_images_directory()
|
||
if not os.path.isabs(path):
|
||
s = os.path.split(path)
|
||
path = os.path.normpath(os.path.join(img_directory, *s))
|
||
|
||
# Compatibility with old topologies we look in parent directory
|
||
# We look at first in new location
|
||
if not os.path.exists(path):
|
||
old_path = os.path.normpath(os.path.join(img_directory, '..', *s))
|
||
if os.path.exists(old_path):
|
||
return force_unix_path(old_path)
|
||
|
||
return force_unix_path(path)
|
||
else:
|
||
# For non local server we disallow using absolute path outside image directory
|
||
if Config.instance().get_section_config("Server").get("local", False) is False:
|
||
img_directory = self.config.get_section_config("Server").get("images_path", os.path.expanduser("~/GNS3/images"))
|
||
if len(os.path.commonprefix([img_directory, path])) < len(img_directory):
|
||
raise VMError("{} is not allowed on this remote server. Please use only a filename in {}.".format(path, img_directory))
|
||
|
||
return force_unix_path(path)
|
||
|
||
def get_relative_image_path(self, path):
|
||
"""
|
||
Get a path relative to images directory path
|
||
or an abspath if the path is not located inside
|
||
image directory
|
||
|
||
:param path: file path
|
||
:return: file path
|
||
"""
|
||
|
||
if not path:
|
||
return ""
|
||
img_directory = self.get_images_directory()
|
||
path = self.get_abs_image_path(path)
|
||
if os.path.commonprefix([img_directory, path]) == img_directory:
|
||
return os.path.relpath(path, img_directory)
|
||
return path
|
||
|
||
@asyncio.coroutine
|
||
def list_images(self):
|
||
"""
|
||
Return the list of available images for this VM type
|
||
|
||
:returns: Array of hash
|
||
"""
|
||
|
||
images = []
|
||
img_dir = self.get_images_directory()
|
||
for root, dirs, files in os.walk(img_dir):
|
||
for filename in files:
|
||
if filename[0] != "." and not filename.endswith(".md5sum"):
|
||
path = os.path.relpath(os.path.join(root, filename), img_dir)
|
||
images.append({
|
||
"filename": filename,
|
||
"path": path})
|
||
return images
|
||
|
||
def get_images_directory(self):
|
||
"""
|
||
Get the image directory on disk
|
||
"""
|
||
|
||
raise NotImplementedError
|
||
|
||
@asyncio.coroutine
|
||
def write_image(self, filename, stream):
|
||
directory = self.get_images_directory()
|
||
path = os.path.abspath(os.path.join(directory, *os.path.split(filename)))
|
||
if os.path.commonprefix([directory, path]) != directory:
|
||
raise aiohttp.web.HTTPForbidden(text="Could not write image: {}, {} is forbiden".format(filename, path))
|
||
log.info("Writting image file %s", path)
|
||
try:
|
||
remove_checksum(path)
|
||
os.makedirs(os.path.dirname(path), exist_ok=True)
|
||
with open(path, 'wb+') as f:
|
||
while True:
|
||
packet = yield from stream.read(512)
|
||
if not packet:
|
||
break
|
||
f.write(packet)
|
||
os.chmod(path, stat.S_IWRITE | stat.S_IREAD | stat.S_IEXEC)
|
||
md5sum(path)
|
||
except OSError as e:
|
||
raise aiohttp.web.HTTPConflict(text="Could not write image: {} because {}".format(filename, e))
|