#!/usr/bin/env python
#
# Copyright (C) 2016 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 .
import re
import os
import json
import uuid
import copy
import shutil
import asyncio
import aiohttp
import tempfile
from uuid import UUID, uuid4
from .node import Node
from .compute import ComputeError
from .snapshot import Snapshot
from .drawing import Drawing
from .topology import project_to_topology, load_topology
from .udp_link import UDPLink
from ..config import Config
from ..utils.path import check_path_allowed, get_default_project_directory
from ..utils.asyncio.pool import Pool
from ..utils.asyncio import locked_coroutine
from .export_project import export_project
from .import_project import import_project
from ..compute.iou.utils.application_id import get_next_application_id
import logging
log = logging.getLogger(__name__)
def open_required(func):
"""
Use this decorator to raise an error if the project is not opened
"""
def wrapper(self, *args, **kwargs):
if self._status == "closed":
raise aiohttp.web.HTTPForbidden(text="The project is not opened")
return func(self, *args, **kwargs)
return wrapper
class Project:
"""
A project inside a controller
:param project_id: force project identifier (None by default auto generate an UUID)
:param path: path of the project. (None use the standard directory)
:param status: Status of the project (opened / closed)
"""
def __init__(self, name=None, project_id=None, path=None, controller=None, status="opened",
filename=None, auto_start=False, auto_open=False, auto_close=True,
scene_height=1000, scene_width=2000, zoom=100, show_layers=False, snap_to_grid=False, show_grid=False,
show_interface_labels=False):
self._controller = controller
assert name is not None
self._name = name
self._auto_start = auto_start
self._auto_close = auto_close
self._auto_open = auto_open
self._status = status
self._scene_height = scene_height
self._scene_width = scene_width
self._zoom = zoom
self._show_layers = show_layers
self._snap_to_grid = snap_to_grid
self._show_grid = show_grid
self._show_interface_labels = show_interface_labels
self._loading = False
# Disallow overwrite of existing project
if project_id is None and path is not None:
if os.path.exists(path):
raise aiohttp.web.HTTPForbidden(text="The path {} already exist.".format(path))
if project_id is None:
self._id = str(uuid4())
else:
try:
UUID(project_id, version=4)
except ValueError:
raise aiohttp.web.HTTPBadRequest(text="{} is not a valid UUID".format(project_id))
self._id = project_id
if path is None:
path = os.path.join(get_default_project_directory(), self._id)
self.path = path
if filename is not None:
self._filename = filename
else:
self._filename = self.name + ".gns3"
self.reset()
# At project creation we write an empty .gns3
if not os.path.exists(self._topology_file()):
self.dump()
@asyncio.coroutine
def update(self, **kwargs):
"""
Update the project
:param kwargs: Project properties
"""
old_json = self.__json__()
for prop in kwargs:
setattr(self, prop, kwargs[prop])
# We send notif only if object has changed
if old_json != self.__json__():
self.controller.notification.emit("project.updated", self.__json__())
self.dump()
def reset(self):
"""
Called when open/close a project. Cleanup internal stuff
"""
self._allocated_node_names = set()
self._nodes = {}
self._links = {}
self._drawings = {}
self._snapshots = {}
# List the available snapshots
snapshot_dir = os.path.join(self.path, "snapshots")
if os.path.exists(snapshot_dir):
for snap in os.listdir(snapshot_dir):
if snap.endswith(".gns3project"):
snapshot = Snapshot(self, filename=snap)
self._snapshots[snapshot.id] = snapshot
# Create the project on demand on the compute node
self._project_created_on_compute = set()
@property
def scene_height(self):
return self._scene_height
@scene_height.setter
def scene_height(self, val):
"""
Height of the drawing area
"""
self._scene_height = val
@property
def scene_width(self):
return self._scene_width
@scene_width.setter
def scene_width(self, val):
"""
Width of the drawing area
"""
self._scene_width = val
@property
def zoom(self):
"""
Zoom level in percentage
:return: integer > 0
"""
return self._zoom
@zoom.setter
def zoom(self, zoom):
"""
Setter for zoom level in percentage
"""
self._zoom = zoom
@property
def show_layers(self):
"""
Show layers mode
:return: bool
"""
return self._show_layers
@show_layers.setter
def show_layers(self, show_layers):
"""
Setter for show layers mode
"""
self._show_layers = show_layers
@property
def snap_to_grid(self):
"""
Snap to grid mode
:return: bool
"""
return self._snap_to_grid
@snap_to_grid.setter
def snap_to_grid(self, snap_to_grid):
"""
Setter for snap to grid mode
"""
self._snap_to_grid = snap_to_grid
@property
def show_grid(self):
"""
Show grid mode
:return: bool
"""
return self._show_grid
@show_grid.setter
def show_grid(self, show_grid):
"""
Setter for showing the grid mode
"""
self._show_grid = show_grid
@property
def show_interface_labels(self):
"""
Show interface labels mode
:return: bool
"""
return self._show_interface_labels
@show_interface_labels.setter
def show_interface_labels(self, show_interface_labels):
"""
Setter for show interface labels
"""
self._show_interface_labels = show_interface_labels
@property
def auto_start(self):
"""
Should project auto start when opened
"""
return self._auto_start
@auto_start.setter
def auto_start(self, val):
self._auto_start = val
@property
def auto_close(self):
"""
Should project automaticaly closed when client
stop listening for notification
"""
return self._auto_close
@auto_close.setter
def auto_close(self, val):
self._auto_close = val
@property
def auto_open(self):
return self._auto_open
@auto_open.setter
def auto_open(self, val):
self._auto_open = val
@property
def controller(self):
return self._controller
@property
def name(self):
return self._name
@name.setter
def name(self, val):
self._name = val
@property
def id(self):
return self._id
@property
def path(self):
return self._path
@property
def status(self):
return self._status
@path.setter
def path(self, path):
check_path_allowed(path)
try:
os.makedirs(path, exist_ok=True)
except OSError as e:
raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
if '"' in path:
raise aiohttp.web.HTTPForbidden(text="You are not allowed to use \" in the project directory path. Not supported by Dynamips.")
self._path = path
def _config(self):
return Config.instance().get_section_config("Server")
@property
def captures_directory(self):
"""
Location of the captures files
"""
path = os.path.join(self._path, "project-files", "captures")
os.makedirs(path, exist_ok=True)
return path
@property
def pictures_directory(self):
"""
Location of the images files
"""
path = os.path.join(self._path, "project-files", "images")
os.makedirs(path, exist_ok=True)
return path
@property
def computes(self):
"""
:return: List of computes used by the project
"""
return self._project_created_on_compute
def remove_allocated_node_name(self, name):
"""
Removes an allocated node name
:param name: allocated node name
"""
if name in self._allocated_node_names:
self._allocated_node_names.remove(name)
def update_allocated_node_name(self, base_name):
"""
Updates a node name or generate a new if no node
name is available.
:param base_name: new node base name
"""
if base_name is None:
return None
base_name = re.sub(r"[ ]", "", base_name)
if base_name in self._allocated_node_names:
base_name = re.sub(r"[0-9]+$", "{0}", base_name)
if '{0}' in base_name or '{id}' in base_name:
# base name is a template, replace {0} or {id} by an unique identifier
for number in range(1, 1000000):
try:
name = base_name.format(number, id=number, name="Node")
except KeyError as e:
raise aiohttp.web.HTTPConflict(text="{" + e.args[0] + "} is not a valid replacement string in the node name")
except (ValueError, IndexError) as e:
raise aiohttp.web.HTTPConflict(text="{} is not a valid replacement string in the node name".format(base_name))
if name not in self._allocated_node_names:
self._allocated_node_names.add(name)
return name
else:
if base_name not in self._allocated_node_names:
self._allocated_node_names.add(base_name)
return base_name
# base name is not unique, let's find a unique name by appending a number
for number in range(1, 1000000):
name = base_name + str(number)
if name not in self._allocated_node_names:
self._allocated_node_names.add(name)
return name
raise aiohttp.web.HTTPConflict(text="A node name could not be allocated (node limit reached?)")
def update_node_name(self, node, new_name):
if new_name and node.name != new_name:
self.remove_allocated_node_name(node.name)
return self.update_allocated_node_name(new_name)
return new_name
@open_required
@asyncio.coroutine
def add_node_from_appliance(self, appliance_id, x=0, y=0, compute_id=None):
"""
Create a node from an appliance
"""
try:
template = self.controller.appliances[appliance_id].data
except KeyError:
msg = "Appliance {} doesn't exist".format(appliance_id)
log.error(msg)
raise aiohttp.web.HTTPNotFound(text=msg)
template["x"] = x
template["y"] = y
node_type = template.pop("node_type")
compute = self.controller.get_compute(template.pop("server", compute_id))
name = template.pop("name")
default_name_format = template.pop("default_name_format", "{name}-{0}")
name = default_name_format.replace("{name}", name)
node_id = str(uuid.uuid4())
node = yield from self.add_node(compute, name, node_id, node_type=node_type, **template)
return node
@open_required
@asyncio.coroutine
def add_node(self, compute, name, node_id, dump=True, node_type=None, **kwargs):
"""
Create a node or return an existing node
:param dump: Dump topology to disk
:param kwargs: See the documentation of node
"""
if node_id in self._nodes:
return self._nodes[node_id]
if node_type == "iou" and 'application_id' not in kwargs.keys():
kwargs['application_id'] = get_next_application_id(self._nodes.values())
node = Node(self, compute, name, node_id=node_id, node_type=node_type, **kwargs)
if compute not in self._project_created_on_compute:
# For a local server we send the project path
if compute.id == "local":
yield from compute.post("/projects", data={
"name": self._name,
"project_id": self._id,
"path": self._path
})
else:
yield from compute.post("/projects", data={
"name": self._name,
"project_id": self._id,
})
self._project_created_on_compute.add(compute)
yield from node.create()
self._nodes[node.id] = node
self.controller.notification.emit("node.created", node.__json__())
if dump:
self.dump()
return node
@locked_coroutine
def __delete_node_links(self, node):
"""
Delete all link connected to this node.
The operation use a lock to avoid cleaning links from
multiple nodes at the same time.
"""
for link in list(self._links.values()):
if node in link.nodes:
yield from self.delete_link(link.id)
@open_required
@asyncio.coroutine
def delete_node(self, node_id):
node = self.get_node(node_id)
yield from self.__delete_node_links(node)
self.remove_allocated_node_name(node.name)
del self._nodes[node.id]
yield from node.destroy()
self.dump()
self.controller.notification.emit("node.deleted", node.__json__())
@open_required
def get_node(self, node_id):
"""
Return the node or raise a 404 if the node is unknown
"""
try:
return self._nodes[node_id]
except KeyError:
raise aiohttp.web.HTTPNotFound(text="Node ID {} doesn't exist".format(node_id))
@property
def nodes(self):
"""
:returns: Dictionary of the nodes
"""
return self._nodes
@property
def drawings(self):
"""
:returns: Dictionary of the drawings
"""
return self._drawings
@open_required
@asyncio.coroutine
def add_drawing(self, drawing_id=None, dump=True, **kwargs):
"""
Create an drawing or return an existing drawing
:param dump: Dump the topology to disk
:param kwargs: See the documentation of drawing
"""
if drawing_id not in self._drawings:
drawing = Drawing(self, drawing_id=drawing_id, **kwargs)
self._drawings[drawing.id] = drawing
self.controller.notification.emit("drawing.created", drawing.__json__())
if dump:
self.dump()
return drawing
return self._drawings[drawing_id]
@open_required
def get_drawing(self, drawing_id):
"""
Return the Drawing or raise a 404 if the drawing is unknown
"""
try:
return self._drawings[drawing_id]
except KeyError:
raise aiohttp.web.HTTPNotFound(text="Drawing ID {} doesn't exist".format(drawing_id))
@open_required
@asyncio.coroutine
def delete_drawing(self, drawing_id):
drawing = self.get_drawing(drawing_id)
del self._drawings[drawing.id]
self.dump()
self.controller.notification.emit("drawing.deleted", drawing.__json__())
@open_required
@asyncio.coroutine
def add_link(self, link_id=None, dump=True):
"""
Create a link. By default the link is empty
:param dump: Dump topology to disk
"""
if link_id and link_id in self._links:
return self._links[link_id]
link = UDPLink(self, link_id=link_id)
self._links[link.id] = link
if dump:
self.dump()
return link
@open_required
@asyncio.coroutine
def delete_link(self, link_id):
link = self.get_link(link_id)
del self._links[link.id]
yield from link.delete()
self.dump()
self.controller.notification.emit("link.deleted", link.__json__())
@open_required
def get_link(self, link_id):
"""
Return the Link or raise a 404 if the link is unknown
"""
try:
return self._links[link_id]
except KeyError:
raise aiohttp.web.HTTPNotFound(text="Link ID {} doesn't exist".format(link_id))
@property
def links(self):
"""
:returns: Dictionary of the Links
"""
return self._links
@property
def snapshots(self):
"""
:returns: Dictionary of snapshots
"""
return self._snapshots
@open_required
def get_snapshot(self, snapshot_id):
"""
Return the snapshot or raise a 404 if the snapshot is unknown
"""
try:
return self._snapshots[snapshot_id]
except KeyError:
raise aiohttp.web.HTTPNotFound(text="Snapshot ID {} doesn't exist".format(snapshot_id))
@open_required
@asyncio.coroutine
def snapshot(self, name):
"""
Snapshot the project
:param name: Name of the snapshot
"""
if name in [snap.name for snap in self.snapshots.values()]:
raise aiohttp.web_exceptions.HTTPConflict(text="The snapshot {} already exist".format(name))
snapshot = Snapshot(self, name=name)
try:
if os.path.exists(snapshot.path):
raise aiohttp.web_exceptions.HTTPConflict(text="The snapshot {} already exist".format(name))
os.makedirs(os.path.join(self.path, "snapshots"), exist_ok=True)
with tempfile.TemporaryDirectory() as tmpdir:
zipstream = yield from export_project(self, tmpdir, keep_compute_id=True, allow_all_nodes=True)
with open(snapshot.path, "wb+") as f:
for data in zipstream:
f.write(data)
except OSError as e:
raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
self._snapshots[snapshot.id] = snapshot
return snapshot
@open_required
@asyncio.coroutine
def delete_snapshot(self, snapshot_id):
snapshot = self.get_snapshot(snapshot_id)
del self._snapshots[snapshot.id]
os.remove(snapshot.path)
@asyncio.coroutine
def close(self, ignore_notification=False):
yield from self.stop_all()
for compute in list(self._project_created_on_compute):
try:
yield from compute.post("/projects/{}/close".format(self._id), dont_connect=True)
# We don't care if a compute is down at this step
except (ComputeError, aiohttp.web.HTTPError, aiohttp.ClientResponseError, TimeoutError):
pass
self._cleanPictures()
self._status = "closed"
if not ignore_notification:
self.controller.notification.emit("project.closed", self.__json__())
def _cleanPictures(self):
"""
Delete unused images
"""
# Project have been deleted
if not os.path.exists(self.path):
return
try:
pictures = set(os.listdir(self.pictures_directory))
for drawing in self._drawings.values():
try:
pictures.remove(drawing.ressource_filename)
except KeyError:
pass
for pict in pictures:
os.remove(os.path.join(self.pictures_directory, pict))
except OSError as e:
log.warning(str(e))
@asyncio.coroutine
def delete(self):
if self._status != "opened":
yield from self.open()
yield from self.delete_on_computes()
yield from self.close()
try:
shutil.rmtree(self.path)
except OSError as e:
raise aiohttp.web.HTTPConflict(text="Can not delete project directory {}: {}".format(self.path, str(e)))
@asyncio.coroutine
def delete_on_computes(self):
"""
Delete the project on computes but not on controller
"""
for compute in list(self._project_created_on_compute):
if compute.id != "local":
yield from compute.delete("/projects/{}".format(self._id))
self._project_created_on_compute.remove(compute)
@classmethod
def _get_default_project_directory(cls):
"""
Return the default location for the project directory
depending of the operating system
"""
server_config = Config.instance().get_section_config("Server")
path = os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects"))
path = os.path.normpath(path)
try:
os.makedirs(path, exist_ok=True)
except OSError as e:
raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
return path
def _topology_file(self):
return os.path.join(self.path, self._filename)
@locked_coroutine
def open(self):
"""
Load topology elements
"""
if self._status == "opened":
return
self.reset()
self._loading = True
self._status = "opened"
path = self._topology_file()
if not os.path.exists(path):
self._loading = False
return
try:
shutil.copy(path, path + ".backup")
except OSError:
pass
try:
topology = load_topology(path)["topology"]
for compute in topology.get("computes", []):
yield from self.controller.add_compute(**compute)
for node in topology.get("nodes", []):
compute = self.controller.get_compute(node.pop("compute_id"))
name = node.pop("name")
node_id = node.pop("node_id", str(uuid.uuid4()))
yield from self.add_node(compute, name, node_id, dump=False, **node)
for link_data in topology.get("links", []):
if 'link_id' not in link_data.keys():
# skip the link
continue
link = yield from self.add_link(link_id=link_data["link_id"])
if "filters" in link_data:
yield from link.update_filters(link_data["filters"])
for node_link in link_data["nodes"]:
node = self.get_node(node_link["node_id"])
yield from link.add_node(node, node_link["adapter_number"], node_link["port_number"], label=node_link.get("label"), dump=False)
for drawing_data in topology.get("drawings", []):
yield from self.add_drawing(dump=False, **drawing_data)
self.dump()
# We catch all error to be able to rollback the .gns3 to the previous state
except Exception as e:
for compute in list(self._project_created_on_compute):
try:
yield from compute.post("/projects/{}/close".format(self._id))
# We don't care if a compute is down at this step
except (ComputeError, aiohttp.web.HTTPNotFound, aiohttp.web.HTTPConflict, aiohttp.ServerDisconnectedError):
pass
try:
if os.path.exists(path + ".backup"):
shutil.copy(path + ".backup", path)
except (PermissionError, OSError):
pass
self._status = "closed"
self._loading = False
if isinstance(e, ComputeError):
raise aiohttp.web.HTTPConflict(text=str(e))
else:
raise e
try:
os.remove(path + ".backup")
except OSError:
pass
self._loading = False
# Should we start the nodes when project is open
if self._auto_start:
# Start all in the background without waiting for completion
# we ignore errors because we want to let the user open
# their project and fix it
asyncio.async(self.start_all())
@asyncio.coroutine
def wait_loaded(self):
"""
Wait until the project finish loading
"""
while self._loading:
yield from asyncio.sleep(0.5)
@asyncio.coroutine
def duplicate(self, name=None, location=None):
"""
Duplicate a project
It's the save as feature of the 1.X. It's implemented on top of the
export / import features. It will generate a gns3p and reimport it.
It's a little slower but we have only one implementation to maintain.
:param name: Name of the new project. A new one will be generated in case of conflicts
:param location: Parent directory of the new project
"""
# If the project was not open we open it temporary
previous_status = self._status
if self._status == "closed":
yield from self.open()
self.dump()
try:
with tempfile.TemporaryDirectory() as tmpdir:
zipstream = yield from export_project(self, tmpdir, keep_compute_id=True, allow_all_nodes=True)
with open(os.path.join(tmpdir, "project.gns3p"), "wb+") as f:
for data in zipstream:
f.write(data)
with open(os.path.join(tmpdir, "project.gns3p"), "rb") as f:
project = yield from import_project(self._controller, str(uuid.uuid4()), f, location=location, name=name, keep_compute_id=True)
except (OSError, UnicodeEncodeError) as e:
raise aiohttp.web.HTTPConflict(text="Can not duplicate project: {}".format(str(e)))
if previous_status == "closed":
yield from self.close()
return project
def is_running(self):
"""
If a node is started or paused return True
"""
for node in self._nodes.values():
# Some node type are always running we ignore them
if node.status != "stopped" and not node.is_always_running():
return True
return False
def dump(self):
"""
Dump topology to disk
"""
try:
topo = project_to_topology(self)
path = self._topology_file()
log.debug("Write %s", path)
with open(path + ".tmp", "w+", encoding="utf-8") as f:
json.dump(topo, f, indent=4, sort_keys=True)
shutil.move(path + ".tmp", path)
except OSError as e:
raise aiohttp.web.HTTPInternalServerError(text="Could not write topology: {}".format(e))
@asyncio.coroutine
def start_all(self):
"""
Start all nodes
"""
pool = Pool(concurrency=3)
for node in self.nodes.values():
pool.append(node.start)
yield from pool.join()
@asyncio.coroutine
def stop_all(self):
"""
Stop all nodes
"""
pool = Pool(concurrency=3)
for node in self.nodes.values():
pool.append(node.stop)
yield from pool.join()
@asyncio.coroutine
def suspend_all(self):
"""
Suspend all nodes
"""
pool = Pool(concurrency=3)
for node in self.nodes.values():
pool.append(node.suspend)
yield from pool.join()
@asyncio.coroutine
def duplicate_node(self, node, x, y, z):
"""
Duplicate a node
:param node: Node instance
:param x: X position
:param y: Y position
:param z: Z position
:returns: New node
"""
if node.status != "stopped" and not node.is_always_running():
raise aiohttp.web.HTTPConflict(text="Cannot duplicate node data while the node is running")
data = copy.deepcopy(node.__json__(topology_dump=True))
# Some properties like internal ID should not be duplicate
for unique_property in (
'node_id',
'name',
'compute_id',
'application_id',
'dynamips_id'):
data.pop(unique_property, None)
if 'properties' in data:
data['properties'].pop(unique_property, None)
node_type = data.pop('node_type')
data['x'] = x
data['y'] = y
data['z'] = z
new_node_uuid = str(uuid.uuid4())
new_node = yield from self.add_node(
node.compute,
node.name,
new_node_uuid,
node_type=node_type,
**data)
try:
yield from node.post("/duplicate", timeout=None, data={
"destination_node_id": new_node_uuid
})
except aiohttp.web.HTTPNotFound as e:
yield from self.delete_node(new_node_uuid)
raise aiohttp.web.HTTPConflict(text="This node type cannot be duplicated")
except aiohttp.web.HTTPConflict as e:
yield from self.delete_node(new_node_uuid)
raise e
return new_node
def __json__(self):
return {
"name": self._name,
"project_id": self._id,
"path": self._path,
"filename": self._filename,
"status": self._status,
"auto_start": self._auto_start,
"auto_close": self._auto_close,
"auto_open": self._auto_open,
"scene_height": self._scene_height,
"scene_width": self._scene_width,
"zoom": self._zoom,
"show_layers": self._show_layers,
"snap_to_grid": self._snap_to_grid,
"show_grid": self._show_grid,
"show_interface_labels": self._show_interface_labels
}
def __repr__(self):
return "".format(self._name, self._id)