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gns3-server/gns3server/modules/dynamips/__init__.py
Jeremy 46cbcd6132 New Dynamips integration part 1
2015-02-09 18:24:13 -07:00

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# -*- 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/>.
"""
Dynamips server module.
"""
import sys
import os
import base64
import tempfile
import shutil
import glob
import socket
from gns3server.config import Config
# from .hypervisor import Hypervisor
# from .hypervisor_manager import HypervisorManager
# from .dynamips_error import DynamipsError
#
# # Nodes
# from .nodes.router import Router
# from .nodes.c1700 import C1700
# from .nodes.c2600 import C2600
# from .nodes.c2691 import C2691
# from .nodes.c3600 import C3600
# from .nodes.c3725 import C3725
# from .nodes.c3745 import C3745
# from .nodes.c7200 import C7200
# from .nodes.bridge import Bridge
# from .nodes.ethernet_switch import EthernetSwitch
# from .nodes.atm_switch import ATMSwitch
# from .nodes.atm_bridge import ATMBridge
# from .nodes.frame_relay_switch import FrameRelaySwitch
# from .nodes.hub import Hub
#
# # Adapters
# from .adapters.c7200_io_2fe import C7200_IO_2FE
# from .adapters.c7200_io_fe import C7200_IO_FE
# from .adapters.c7200_io_ge_e import C7200_IO_GE_E
# from .adapters.nm_16esw import NM_16ESW
# from .adapters.nm_1e import NM_1E
# from .adapters.nm_1fe_tx import NM_1FE_TX
# from .adapters.nm_4e import NM_4E
# from .adapters.nm_4t import NM_4T
# from .adapters.pa_2fe_tx import PA_2FE_TX
# from .adapters.pa_4e import PA_4E
# from .adapters.pa_4t import PA_4T
# from .adapters.pa_8e import PA_8E
# from .adapters.pa_8t import PA_8T
# from .adapters.pa_a1 import PA_A1
# from .adapters.pa_fe_tx import PA_FE_TX
# from .adapters.pa_ge import PA_GE
# from .adapters.pa_pos_oc3 import PA_POS_OC3
# from .adapters.wic_1t import WIC_1T
# from .adapters.wic_2t import WIC_2T
# from .adapters.wic_1enet import WIC_1ENET
#
# # NIOs
# from .nios.nio_udp import NIO_UDP
# from .nios.nio_udp_auto import NIO_UDP_auto
# from .nios.nio_unix import NIO_UNIX
# from .nios.nio_vde import NIO_VDE
# from .nios.nio_tap import NIO_TAP
# from .nios.nio_generic_ethernet import NIO_GenericEthernet
# from .nios.nio_linux_ethernet import NIO_LinuxEthernet
# from .nios.nio_fifo import NIO_FIFO
# from .nios.nio_mcast import NIO_Mcast
# from .nios.nio_null import NIO_Null
#
# from .backends import vm
# from .backends import ethsw
# from .backends import ethhub
# from .backends import frsw
# from .backends import atmsw
import time
import asyncio
import logging
log = logging.getLogger(__name__)
from pkg_resources import parse_version
from ..base_manager import BaseManager
from .dynamips_error import DynamipsError
from .hypervisor import Hypervisor
from .nodes.router import Router
class Dynamips(BaseManager):
_VM_CLASS = Router
def __init__(self):
super().__init__()
self._dynamips_path = None
# FIXME: temporary
self._working_dir = "/tmp"
self._dynamips_path = "/usr/local/bin/dynamips"
def find_dynamips(self):
# look for Dynamips
dynamips_path = self.config.get_section_config("Dynamips").get("dynamips_path")
if not dynamips_path:
dynamips_path = shutil.which("dynamips")
if not dynamips_path:
raise DynamipsError("Could not find Dynamips")
if not os.path.isfile(dynamips_path):
raise DynamipsError("Dynamips {} is not accessible".format(dynamips_path))
if not os.access(dynamips_path, os.X_OK):
raise DynamipsError("Dynamips is not executable")
self._dynamips_path = dynamips_path
return dynamips_path
@asyncio.coroutine
def _wait_for_hypervisor(self, host, port, timeout=10.0):
"""
Waits for an hypervisor to be started (accepting a socket connection)
:param host: host/address to connect to the hypervisor
:param port: port to connect to the hypervisor
"""
begin = time.time()
connection_success = False
last_exception = None
while time.time() - begin < timeout:
yield from asyncio.sleep(0.01)
try:
_, writer = yield from asyncio.open_connection(host, port)
writer.close()
except OSError as e:
last_exception = e
continue
connection_success = True
break
if not connection_success:
raise DynamipsError("Couldn't connect to hypervisor on {}:{} :{}".format(host, port, last_exception))
else:
log.info("Dynamips server ready after {:.4f} seconds".format(time.time() - begin))
@asyncio.coroutine
def start_new_hypervisor(self):
"""
Creates a new Dynamips process and start it.
:returns: the new hypervisor instance
"""
try:
# let the OS find an unused port for the Dynamips hypervisor
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.bind(("127.0.0.1", 0))
port = sock.getsockname()[1]
except OSError as e:
raise DynamipsError("Could not find free port for the Dynamips hypervisor: {}".format(e))
hypervisor = Hypervisor(self._dynamips_path, self._working_dir, "127.0.0.1", port)
log.info("Ceating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, self._working_dir))
yield from hypervisor.start()
yield from self._wait_for_hypervisor("127.0.0.1", port)
log.info("Hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port))
yield from hypervisor.connect()
if parse_version(hypervisor.version) < parse_version('0.2.11'):
raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
return hypervisor
# class Dynamips(IModule):
# """
# Dynamips module.
#
# :param name: module name
# :param args: arguments for the module
# :param kwargs: named arguments for the module
# """
#
# def stop(self, signum=None):
# """
# Properly stops the module.
#
# :param signum: signal number (if called by the signal handler)
# """
#
# if not sys.platform.startswith("win32"):
# self._callback.stop()
#
# # automatically save configs for all router instances
# for router_id in self._routers:
# router = self._routers[router_id]
# try:
# router.save_configs()
# except DynamipsError:
# continue
#
# # stop all Dynamips hypervisors
# if self._hypervisor_manager:
# self._hypervisor_manager.stop_all_hypervisors()
#
# self.delete_dynamips_files()
# IModule.stop(self, signum) # this will stop the I/O loop
#
# def get_device_instance(self, device_id, instance_dict):
# """
# Returns a device instance.
#
# :param device_id: device identifier
# :param instance_dict: dictionary containing the instances
#
# :returns: device instance
# """
#
# if device_id not in instance_dict:
# log.debug("device ID {} doesn't exist".format(device_id), exc_info=1)
# self.send_custom_error("Device ID {} doesn't exist".format(device_id))
# return None
# return instance_dict[device_id]
#
# def delete_dynamips_files(self):
# """
# Deletes useless Dynamips files from the working directory
# """
#
# files = glob.glob(os.path.join(self._working_dir, "dynamips", "*.ghost"))
# files += glob.glob(os.path.join(self._working_dir, "dynamips", "*_lock"))
# files += glob.glob(os.path.join(self._working_dir, "dynamips", "ilt_*"))
# files += glob.glob(os.path.join(self._working_dir, "dynamips", "c[0-9][0-9][0-9][0-9]_*_rommon_vars"))
# files += glob.glob(os.path.join(self._working_dir, "dynamips", "c[0-9][0-9][0-9][0-9]_*_ssa"))
# for file in files:
# try:
# log.debug("deleting file {}".format(file))
# os.remove(file)
# except OSError as e:
# log.warn("could not delete file {}: {}".format(file, e))
# continue
#
# @IModule.route("dynamips.reset")
# def reset(self, request=None):
# """
# Resets the module (JSON-RPC notification).
#
# :param request: JSON request (not used)
# """
#
# # automatically save configs for all router instances
# for router_id in self._routers:
# router = self._routers[router_id]
# try:
# router.save_configs()
# except DynamipsError:
# continue
#
# # stop all Dynamips hypervisors
# if self._hypervisor_manager:
# self._hypervisor_manager.stop_all_hypervisors()
#
# # resets the instance counters
# Router.reset()
# EthernetSwitch.reset()
# Hub.reset()
# FrameRelaySwitch.reset()
# ATMSwitch.reset()
# NIO_UDP.reset()
# NIO_UDP_auto.reset()
# NIO_UNIX.reset()
# NIO_VDE.reset()
# NIO_TAP.reset()
# NIO_GenericEthernet.reset()
# NIO_LinuxEthernet.reset()
# NIO_FIFO.reset()
# NIO_Mcast.reset()
# NIO_Null.reset()
#
# self._routers.clear()
# self._ethernet_switches.clear()
# self._frame_relay_switches.clear()
# self._atm_switches.clear()
#
# self.delete_dynamips_files()
#
# self._hypervisor_manager = None
# self._working_dir = self._projects_dir
# log.info("dynamips module has been reset")
#
# def start_hypervisor_manager(self):
# """
# Starts the hypervisor manager.
# """
#
# # check if Dynamips path exists
# if not os.path.isfile(self._dynamips):
# raise DynamipsError("Dynamips executable {} doesn't exist".format(self._dynamips))
#
# # check if Dynamips is executable
# if not os.access(self._dynamips, os.X_OK):
# raise DynamipsError("Dynamips {} is not executable".format(self._dynamips))
#
# workdir = os.path.join(self._working_dir, "dynamips")
# try:
# os.makedirs(workdir)
# except FileExistsError:
# pass
# except OSError as e:
# raise DynamipsError("Could not create working directory {}".format(e))
#
# # check if the working directory is writable
# if not os.access(workdir, os.W_OK):
# raise DynamipsError("Cannot write to working directory {}".format(workdir))
#
# log.info("starting the hypervisor manager with Dynamips working directory set to '{}'".format(workdir))
# self._hypervisor_manager = HypervisorManager(self._dynamips, workdir, self._host, self._console_host)
#
# for name, value in self._hypervisor_manager_settings.items():
# if hasattr(self._hypervisor_manager, name) and getattr(self._hypervisor_manager, name) != value:
# setattr(self._hypervisor_manager, name, value)
#
# @IModule.route("dynamips.settings")
# def settings(self, request):
# """
# Set or update settings.
#
# Optional request parameters:
# - path (path to the Dynamips executable)
# - working_dir (path to a working directory)
# - project_name
#
# :param request: JSON request
# """
#
# if request is None:
# self.send_param_error()
# return
#
# log.debug("received request {}".format(request))
#
# #TODO: JSON schema validation
# if not self._hypervisor_manager:
#
# if "path" in request:
# self._dynamips = request.pop("path")
#
# if "working_dir" in request:
# self._working_dir = request.pop("working_dir")
# log.info("this server is local")
# else:
# self._working_dir = os.path.join(self._projects_dir, request["project_name"])
# log.info("this server is remote with working directory path to {}".format(self._working_dir))
#
# self._hypervisor_manager_settings = request
#
# else:
# if "project_name" in request:
# # for remote server
# new_working_dir = os.path.join(self._projects_dir, request["project_name"])
#
# if self._projects_dir != self._working_dir != new_working_dir:
#
# # trick to avoid file locks by Dynamips on Windows
# if sys.platform.startswith("win"):
# self._hypervisor_manager.working_dir = tempfile.gettempdir()
#
# if not os.path.isdir(new_working_dir):
# try:
# self.delete_dynamips_files()
# 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
#
# elif "working_dir" in request:
# # for local server
# new_working_dir = request.pop("working_dir")
#
# try:
# self._hypervisor_manager.working_dir = new_working_dir
# except DynamipsError as e:
# log.error("could not change working directory: {}".format(e))
# return
#
# self._working_dir = new_working_dir
#
# # apply settings to the hypervisor manager
# for name, value in request.items():
# if hasattr(self._hypervisor_manager, name) and getattr(self._hypervisor_manager, name) != value:
# setattr(self._hypervisor_manager, name, value)
#
# @IModule.route("dynamips.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)
#
# def create_nio(self, node, request):
# """
# Creates a new NIO.
#
# :param node: node requesting the NIO
# :param request: the original request with the
# necessary information to create the NIO
#
# :returns: a NIO object
# """
#
# 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 DynamipsError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
# # check if we have an allocated NIO UDP auto
# nio = node.hypervisor.get_nio_udp_auto(lport)
# if not nio:
# # otherwise create an NIO UDP
# nio = NIO_UDP(node.hypervisor, lport, rhost, rport)
# else:
# nio.connect(rhost, rport)
# elif request["nio"]["type"] == "nio_generic_ethernet":
# ethernet_device = request["nio"]["ethernet_device"]
# if sys.platform.startswith("win"):
# # replace the interface name by the GUID on Windows
# interfaces = get_windows_interfaces()
# npf_interface = None
# for interface in interfaces:
# if interface["name"] == ethernet_device:
# npf_interface = interface["id"]
# if not npf_interface:
# raise DynamipsError("Could not find interface {} on this host".format(ethernet_device))
# else:
# ethernet_device = npf_interface
# nio = NIO_GenericEthernet(node.hypervisor, ethernet_device)
# elif request["nio"]["type"] == "nio_linux_ethernet":
# if sys.platform.startswith("win"):
# raise DynamipsError("This NIO type is not supported on Windows")
# ethernet_device = request["nio"]["ethernet_device"]
# nio = NIO_LinuxEthernet(node.hypervisor, ethernet_device)
# elif request["nio"]["type"] == "nio_tap":
# tap_device = request["nio"]["tap_device"]
# nio = NIO_TAP(node.hypervisor, tap_device)
# elif request["nio"]["type"] == "nio_unix":
# local_file = request["nio"]["local_file"]
# remote_file = request["nio"]["remote_file"]
# nio = NIO_UNIX(node.hypervisor, local_file, remote_file)
# elif request["nio"]["type"] == "nio_vde":
# control_file = request["nio"]["control_file"]
# local_file = request["nio"]["local_file"]
# nio = NIO_VDE(node.hypervisor, control_file, local_file)
# elif request["nio"]["type"] == "nio_null":
# nio = NIO_Null(node.hypervisor)
# return nio
#
# def allocate_udp_port(self, node):
# """
# Allocates a UDP port in order to create an UDP NIO.
#
# :param node: the node that needs to allocate an UDP port
#
# :returns: dictionary with the allocated host/port info
# """
#
# port = node.hypervisor.allocate_udp_port()
# host = node.hypervisor.host
#
# log.info("{} [id={}] has allocated UDP port {} with host {}".format(node.name,
# node.id,
# port,
# host))
# response = {"lport": port}
# return response
#
# def set_ghost_ios(self, router):
# """
# Manages Ghost IOS support.
#
# :param router: Router instance
# """
#
# if not router.mmap:
# raise DynamipsError("mmap support is required to enable ghost IOS support")
#
# ghost_instance = router.formatted_ghost_file()
# all_ghosts = []
#
# # search of an existing ghost instance across all hypervisors
# for hypervisor in self._hypervisor_manager.hypervisors:
# all_ghosts.extend(hypervisor.ghosts)
#
# if ghost_instance not in all_ghosts:
# # create a new ghost IOS instance
# ghost = Router(router.hypervisor, "ghost-" + ghost_instance, router.platform, ghost_flag=True)
# ghost.image = router.image
# # for 7200s, the NPE must be set when using an NPE-G2.
# if router.platform == "c7200":
# ghost.npe = router.npe
# ghost.ghost_status = 1
# ghost.ghost_file = ghost_instance
# ghost.ram = router.ram
# try:
# ghost.start()
# ghost.stop()
# except DynamipsError:
# raise
# finally:
# ghost.clean_delete()
#
# if router.ghost_file != ghost_instance:
# # set the ghost file to the router
# router.ghost_status = 2
# router.ghost_file = ghost_instance
#
# def create_config_from_file(self, local_base_config, router, destination_config_path):
# """
# Creates a config file from a local base config
#
# :param local_base_config: path the a local base config
# :param router: router instance
# :param destination_config_path: path to the destination config file
#
# :returns: relative path to the created config file
# """
#
# log.info("creating config file {} from {}".format(destination_config_path, local_base_config))
# config_path = destination_config_path
# config_dir = os.path.dirname(destination_config_path)
# try:
# os.makedirs(config_dir)
# except FileExistsError:
# pass
# except OSError as e:
# raise DynamipsError("Could not create configs directory: {}".format(e))
#
# try:
# with open(local_base_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', router.name)
# f.write(config)
# except OSError as e:
# raise DynamipsError("Could not save the configuration from {} to {}: {}".format(local_base_config, config_path, e))
# return "configs" + os.sep + os.path.basename(config_path)
#
# def create_config_from_base64(self, config_base64, router, destination_config_path):
# """
# Creates a config file from a base64 encoded config.
#
# :param config_base64: base64 encoded config
# :param router: router instance
# :param destination_config_path: path to the destination config file
#
# :returns: relative path to the created config file
# """
#
# log.info("creating config file {} from base64".format(destination_config_path))
# config = base64.decodebytes(config_base64.encode("utf-8")).decode("utf-8")
# config = "!\n" + config.replace("\r", "")
# config = config.replace('%h', router.name)
# config_dir = os.path.dirname(destination_config_path)
# try:
# os.makedirs(config_dir)
# except FileExistsError:
# pass
# except OSError as e:
# raise DynamipsError("Could not create configs directory: {}".format(e))
#
# config_path = destination_config_path
# try:
# with open(config_path, "w") as f:
# log.info("saving startup-config to {}".format(config_path))
# f.write(config)
# except OSError as e:
# raise DynamipsError("Could not save the configuration {}: {}".format(config_path, e))
# return "configs" + os.sep + os.path.basename(config_path)
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