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mirror of https://github.com/GNS3/gns3-server synced 2024-12-27 09:18:09 +00:00
gns3-server/gns3server/modules/iou/__init__.py

843 lines
29 KiB
Python

# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 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/>.
"""
IOU server module.
"""
import os
import base64
import ntpath
import stat
import tempfile
import socket
import shutil
from gns3server.modules import IModule
from gns3server.config import Config
from gns3dms.cloud.rackspace_ctrl import get_provider
from .iou_device import IOUDevice
from .iou_error import IOUError
from .nios.nio_udp import NIO_UDP
from .nios.nio_tap import NIO_TAP
from .nios.nio_generic_ethernet import NIO_GenericEthernet
from ..attic import find_unused_port
from ..attic import has_privileged_access
from .schemas import IOU_CREATE_SCHEMA
from .schemas import IOU_DELETE_SCHEMA
from .schemas import IOU_UPDATE_SCHEMA
from .schemas import IOU_START_SCHEMA
from .schemas import IOU_STOP_SCHEMA
from .schemas import IOU_RELOAD_SCHEMA
from .schemas import IOU_ALLOCATE_UDP_PORT_SCHEMA
from .schemas import IOU_ADD_NIO_SCHEMA
from .schemas import IOU_DELETE_NIO_SCHEMA
from .schemas import IOU_START_CAPTURE_SCHEMA
from .schemas import IOU_STOP_CAPTURE_SCHEMA
from .schemas import IOU_EXPORT_CONFIG_SCHEMA
import logging
log = logging.getLogger(__name__)
class IOU(IModule):
"""
IOU module.
:param name: module name
:param args: arguments for the module
:param kwargs: named arguments for the module
"""
def __init__(self, name, *args, **kwargs):
# get the iouyap location
config = Config.instance()
iou_config = config.get_section_config(name.upper())
self._iouyap = iou_config.get("iouyap_path")
if not self._iouyap or not os.path.isfile(self._iouyap):
paths = [os.getcwd()] + os.environ["PATH"].split(os.pathsep)
# look for iouyap in the current working directory and $PATH
for path in paths:
try:
if "iouyap" in os.listdir(path) and os.access(os.path.join(path, "iouyap"), os.X_OK):
self._iouyap = os.path.join(path, "iouyap")
break
except OSError:
continue
if not self._iouyap:
log.warning("iouyap binary couldn't be found!")
elif not os.access(self._iouyap, os.X_OK):
log.warning("iouyap is not executable")
# a new process start when calling IModule
IModule.__init__(self, name, *args, **kwargs)
self._iou_instances = {}
self._console_start_port_range = iou_config.get("console_start_port_range", 4001)
self._console_end_port_range = iou_config.get("console_end_port_range", 4500)
self._allocated_udp_ports = []
self._udp_start_port_range = iou_config.get("udp_start_port_range", 30001)
self._udp_end_port_range = iou_config.get("udp_end_port_range", 35000)
self._host = iou_config.get("host", kwargs["host"])
self._console_host = iou_config.get("console_host", kwargs["console_host"])
self._projects_dir = kwargs["projects_dir"]
self._tempdir = kwargs["temp_dir"]
self._working_dir = self._projects_dir
self._server_iourc_path = iou_config.get("iourc", "")
self._iourc = ""
# check every 5 seconds
self._iou_callback = self.add_periodic_callback(self._check_iou_is_alive, 5000)
self._iou_callback.start()
def stop(self, signum=None):
"""
Properly stops the module.
:param signum: signal number (if called by the signal handler)
"""
self._iou_callback.stop()
# delete all IOU instances
for iou_id in self._iou_instances:
iou_instance = self._iou_instances[iou_id]
iou_instance.delete()
self.delete_iourc_file()
IModule.stop(self, signum) # this will stop the I/O loop
def _check_iou_is_alive(self):
"""
Periodic callback to check if IOU and iouyap are alive
for each IOU instance.
Sends a notification to the client if not.
"""
for iou_id in self._iou_instances:
iou_instance = self._iou_instances[iou_id]
if iou_instance.started and (not iou_instance.is_running() or not iou_instance.is_iouyap_running()):
notification = {"module": self.name,
"id": iou_id,
"name": iou_instance.name}
if not iou_instance.is_running():
stdout = iou_instance.read_iou_stdout()
notification["message"] = "IOU has stopped running"
notification["details"] = stdout
self.send_notification("{}.iou_stopped".format(self.name), notification)
elif not iou_instance.is_iouyap_running():
stdout = iou_instance.read_iouyap_stdout()
notification["message"] = "iouyap has stopped running"
notification["details"] = stdout
self.send_notification("{}.iouyap_stopped".format(self.name), notification)
iou_instance.stop()
def get_iou_instance(self, iou_id):
"""
Returns an IOU device instance.
:param iou_id: IOU device identifier
:returns: IOUDevice instance
"""
if iou_id not in self._iou_instances:
log.debug("IOU device ID {} doesn't exist".format(iou_id), exc_info=1)
self.send_custom_error("IOU device ID {} doesn't exist".format(iou_id))
return None
return self._iou_instances[iou_id]
def delete_iourc_file(self):
"""
Deletes the IOURC file.
"""
if self._iourc and os.path.isfile(self._iourc):
try:
log.info("deleting iourc file {}".format(self._iourc))
os.remove(self._iourc)
except OSError as e:
log.warn("could not delete iourc file {}: {}".format(self._iourc, e))
@IModule.route("iou.reset")
def reset(self, request=None):
"""
Resets the module (JSON-RPC notification).
:param request: JSON request (not used)
"""
# delete all IOU instances
for iou_id in self._iou_instances:
iou_instance = self._iou_instances[iou_id]
iou_instance.delete()
# resets the instance IDs
IOUDevice.reset()
self._iou_instances.clear()
self._allocated_udp_ports.clear()
self.delete_iourc_file()
self._working_dir = self._projects_dir
log.info("IOU module has been reset")
@IModule.route("iou.settings")
def settings(self, request):
"""
Set or update settings.
Mandatory request parameters:
- iourc (base64 encoded iourc file)
Optional request parameters:
- iouyap (path to iouyap)
- working_dir (path to a working directory)
- project_name
- console_start_port_range
- console_end_port_range
- udp_start_port_range
- udp_end_port_range
:param request: JSON request
"""
if request is None:
self.send_param_error()
return
if "iourc" in request:
iourc_content = base64.decodebytes(request["iourc"].encode("utf-8")).decode("utf-8")
iourc_content = iourc_content.replace("\r\n", "\n") # dos2unix
try:
with tempfile.NamedTemporaryFile(mode="w", delete=False) as f:
log.info("saving iourc file content to {}".format(f.name))
f.write(iourc_content)
self._iourc = f.name
except OSError as e:
raise IOUError("Could not create the iourc file: {}".format(e))
if "iouyap" in request and request["iouyap"]:
self._iouyap = request["iouyap"]
log.info("iouyap path set to {}".format(self._iouyap))
if "working_dir" in request:
new_working_dir = request["working_dir"]
log.info("this server is local with working directory path to {}".format(new_working_dir))
else:
new_working_dir = os.path.join(self._projects_dir, request["project_name"])
log.info("this server is remote with working directory path to {}".format(new_working_dir))
if self._projects_dir != self._working_dir != new_working_dir:
if not os.path.isdir(new_working_dir):
try:
shutil.move(self._working_dir, new_working_dir)
except OSError as e:
log.error("could not move working directory from {} to {}: {}".format(self._working_dir,
new_working_dir,
e))
return
# update the working directory if it has changed
if self._working_dir != new_working_dir:
self._working_dir = new_working_dir
for iou_id in self._iou_instances:
iou_instance = self._iou_instances[iou_id]
iou_instance.working_dir = os.path.join(self._working_dir, "iou", "device-{}".format(iou_instance.id))
if "console_start_port_range" in request and "console_end_port_range" in request:
self._console_start_port_range = request["console_start_port_range"]
self._console_end_port_range = request["console_end_port_range"]
if "udp_start_port_range" in request and "udp_end_port_range" in request:
self._udp_start_port_range = request["udp_start_port_range"]
self._udp_end_port_range = request["udp_end_port_range"]
log.debug("received request {}".format(request))
@IModule.route("iou.create")
def iou_create(self, request):
"""
Creates a new IOU instance.
Mandatory request parameters:
- path (path to the IOU executable)
Optional request parameters:
- name (IOU name)
- console (IOU console port)
Response parameters:
- id (IOU instance identifier)
- name (IOU name)
- default settings
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_CREATE_SCHEMA):
return
name = request["name"]
iou_path = request["path"]
console = request.get("console")
iou_id = request.get("iou_id")
updated_iou_path = os.path.join(self.images_directory, iou_path)
if os.path.isfile(updated_iou_path):
iou_path = updated_iou_path
else:
if not os.path.exists(self.images_directory):
os.mkdir(self.images_directory)
cloud_path = request.get("cloud_path", None)
if cloud_path is not None:
# Download the image from cloud files
_, filename = ntpath.split(iou_path)
src = '{}/{}'.format(cloud_path, filename)
provider = get_provider(self._cloud_settings)
log.debug("Downloading file from {} to {}...".format(src, updated_iou_path))
provider.download_file(src, updated_iou_path)
log.debug("Download of {} complete.".format(src))
# Make file executable
st = os.stat(updated_iou_path)
os.chmod(updated_iou_path, st.st_mode | stat.S_IEXEC)
iou_path = updated_iou_path
try:
iou_instance = IOUDevice(name,
iou_path,
self._working_dir,
iou_id,
console,
self._console_host,
self._console_start_port_range,
self._console_end_port_range)
except IOUError as e:
self.send_custom_error(str(e))
return
response = {"name": iou_instance.name,
"id": iou_instance.id}
defaults = iou_instance.defaults()
response.update(defaults)
self._iou_instances[iou_instance.id] = iou_instance
self.send_response(response)
@IModule.route("iou.delete")
def iou_delete(self, request):
"""
Deletes an IOU instance.
Mandatory request parameters:
- id (IOU instance identifier)
Response parameter:
- True on success
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_DELETE_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
try:
iou_instance.clean_delete()
del self._iou_instances[request["id"]]
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(True)
@IModule.route("iou.update")
def iou_update(self, request):
"""
Updates an IOU instance
Mandatory request parameters:
- id (IOU instance identifier)
Optional request parameters:
- any setting to update
- initial_config_base64 (initial-config base64 encoded)
Response parameters:
- updated settings
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_UPDATE_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
config_path = os.path.join(iou_instance.working_dir, "initial-config.cfg")
try:
if "initial_config_base64" in request:
# a new initial-config has been pushed
config = base64.decodebytes(request["initial_config_base64"].encode("utf-8")).decode("utf-8")
config = "!\n" + config.replace("\r", "")
config = config.replace('%h', iou_instance.name)
try:
with open(config_path, "w") as f:
log.info("saving initial-config to {}".format(config_path))
f.write(config)
except OSError as e:
raise IOUError("Could not save the configuration {}: {}".format(config_path, e))
# update the request with the new local initial-config path
request["initial_config"] = os.path.basename(config_path)
elif "initial_config" in request:
if os.path.isfile(request["initial_config"]) and request["initial_config"] != config_path:
# this is a local file set in the GUI
try:
with open(request["initial_config"], "r", errors="replace") as f:
config = f.read()
with open(config_path, "w") as f:
config = "!\n" + config.replace("\r", "")
config = config.replace('%h', iou_instance.name)
f.write(config)
request["initial_config"] = os.path.basename(config_path)
except OSError as e:
raise IOUError("Could not save the configuration from {} to {}: {}".format(request["initial_config"], config_path, e))
elif not os.path.isfile(config_path):
raise IOUError("Startup-config {} could not be found on this server".format(request["initial_config"]))
except IOUError as e:
self.send_custom_error(str(e))
return
# update the IOU settings
response = {}
for name, value in request.items():
if hasattr(iou_instance, name) and getattr(iou_instance, name) != value:
try:
setattr(iou_instance, name, value)
response[name] = value
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(response)
@IModule.route("iou.start")
def vm_start(self, request):
"""
Starts an IOU instance.
Mandatory request parameters:
- id (IOU instance identifier)
Response parameters:
- True on success
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_START_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
try:
iou_instance.iouyap = self._iouyap
if self._iourc:
iou_instance.iourc = self._iourc
else:
# if there is no IOURC file pushed by the client then use the server IOURC file
iou_instance.iourc = self._server_iourc_path
iou_instance.start()
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(True)
@IModule.route("iou.stop")
def vm_stop(self, request):
"""
Stops an IOU instance.
Mandatory request parameters:
- id (IOU instance identifier)
Response parameters:
- True on success
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_STOP_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
try:
iou_instance.stop()
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(True)
@IModule.route("iou.reload")
def vm_reload(self, request):
"""
Reloads an IOU instance.
Mandatory request parameters:
- id (IOU identifier)
Response parameters:
- True on success
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_RELOAD_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
try:
if iou_instance.is_running():
iou_instance.stop()
iou_instance.start()
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(True)
@IModule.route("iou.allocate_udp_port")
def allocate_udp_port(self, request):
"""
Allocates a UDP port in order to create an UDP NIO.
Mandatory request parameters:
- id (IOU identifier)
- port_id (unique port identifier)
Response parameters:
- port_id (unique port identifier)
- lport (allocated local port)
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_ALLOCATE_UDP_PORT_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
try:
port = find_unused_port(self._udp_start_port_range,
self._udp_end_port_range,
host=self._host,
socket_type="UDP",
ignore_ports=self._allocated_udp_ports)
except Exception as e:
self.send_custom_error(str(e))
return
self._allocated_udp_ports.append(port)
log.info("{} [id={}] has allocated UDP port {} with host {}".format(iou_instance.name,
iou_instance.id,
port,
self._host))
response = {"lport": port,
"port_id": request["port_id"]}
self.send_response(response)
@IModule.route("iou.add_nio")
def add_nio(self, request):
"""
Adds an NIO (Network Input/Output) for an IOU instance.
Mandatory request parameters:
- id (IOU instance identifier)
- slot (slot number)
- port (port number)
- port_id (unique port identifier)
- nio (one of the following)
- type "nio_udp"
- lport (local port)
- rhost (remote host)
- rport (remote port)
- type "nio_generic_ethernet"
- ethernet_device (Ethernet device name e.g. eth0)
- type "nio_tap"
- tap_device (TAP device name e.g. tap0)
Response parameters:
- port_id (unique port identifier)
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_ADD_NIO_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
slot = request["slot"]
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 IOUError("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 has_privileged_access(self._iouyap):
raise IOUError("{} has no privileged access to {}.".format(self._iouyap, tap_device))
nio = NIO_TAP(tap_device)
elif request["nio"]["type"] == "nio_generic_ethernet":
ethernet_device = request["nio"]["ethernet_device"]
if not has_privileged_access(self._iouyap):
raise IOUError("{} has no privileged access to {}.".format(self._iouyap, ethernet_device))
nio = NIO_GenericEthernet(ethernet_device)
if not nio:
raise IOUError("Requested NIO does not exist or is not supported: {}".format(request["nio"]["type"]))
except IOUError as e:
self.send_custom_error(str(e))
return
try:
iou_instance.slot_add_nio_binding(slot, port, nio)
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response({"port_id": request["port_id"]})
@IModule.route("iou.delete_nio")
def delete_nio(self, request):
"""
Deletes an NIO (Network Input/Output).
Mandatory request parameters:
- id (IOU instance identifier)
- slot (slot identifier)
- port (port identifier)
Response parameters:
- True on success
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_DELETE_NIO_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
slot = request["slot"]
port = request["port"]
try:
nio = iou_instance.slot_remove_nio_binding(slot, port)
if isinstance(nio, NIO_UDP) and nio.lport in self._allocated_udp_ports:
self._allocated_udp_ports.remove(nio.lport)
except IOUError as e:
self.send_custom_error(str(e))
return
self.send_response(True)
@IModule.route("iou.start_capture")
def start_capture(self, request):
"""
Starts a packet capture.
Mandatory request parameters:
- id (vm identifier)
- slot (slot number)
- port (port number)
- port_id (port identifier)
- capture_file_name
Optional request parameters:
- data_link_type (PCAP DLT_* value)
Response parameters:
- port_id (port identifier)
- capture_file_path (path to the capture file)
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_START_CAPTURE_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
slot = request["slot"]
port = request["port"]
capture_file_name = request["capture_file_name"]
data_link_type = request.get("data_link_type")
try:
capture_file_path = os.path.join(self._working_dir, "captures", capture_file_name)
iou_instance.start_capture(slot, port, capture_file_path, data_link_type)
except IOUError as e:
self.send_custom_error(str(e))
return
response = {"port_id": request["port_id"],
"capture_file_path": capture_file_path}
self.send_response(response)
@IModule.route("iou.stop_capture")
def stop_capture(self, request):
"""
Stops a packet capture.
Mandatory request parameters:
- id (vm identifier)
- slot (slot number)
- port (port number)
- port_id (port identifier)
Response parameters:
- port_id (port identifier)
:param request: JSON request
"""
# validate the request
if not self.validate_request(request, IOU_STOP_CAPTURE_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
slot = request["slot"]
port = request["port"]
try:
iou_instance.stop_capture(slot, port)
except IOUError as e:
self.send_custom_error(str(e))
return
response = {"port_id": request["port_id"]}
self.send_response(response)
@IModule.route("iou.export_config")
def export_config(self, request):
"""
Exports the initial-config from an IOU instance.
Mandatory request parameters:
- id (vm identifier)
Response parameters:
- initial_config_base64 (initial-config base64 encoded)
- False if no configuration can be exported
"""
# validate the request
if not self.validate_request(request, IOU_EXPORT_CONFIG_SCHEMA):
return
# get the instance
iou_instance = self.get_iou_instance(request["id"])
if not iou_instance:
return
if not iou_instance.initial_config:
self.send_custom_error("unable to export the initial-config because it doesn't exist")
return
response = {}
initial_config_path = os.path.join(iou_instance.working_dir, iou_instance.initial_config)
try:
with open(initial_config_path, "rb") as f:
config = f.read()
response["initial_config_base64"] = base64.encodebytes(config).decode("utf-8")
except OSError as e:
self.send_custom_error("unable to export the initial-config: {}".format(e))
return
if not response:
self.send_response(False)
else:
self.send_response(response)
@IModule.route("iou.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)