mirror of
https://github.com/GNS3/gns3-server
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806 lines
29 KiB
Python
806 lines
29 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2014 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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IOU device management (creates command line, processes, files etc.) in
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order to run an IOU instance.
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"""
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import os
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import socket
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import errno
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import signal
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import subprocess
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import argparse
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import threading
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import configparser
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from .ioucon import start_ioucon
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from .iou_error import IOUError
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from .adapters.ethernet_adapter import EthernetAdapter
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from .adapters.serial_adapter import SerialAdapter
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from .nios.nio_udp import NIO_UDP
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from .nios.nio_tap import NIO_TAP
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from .nios.nio_generic_ethernet import NIO_GenericEthernet
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import logging
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log = logging.getLogger(__name__)
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class IOUDevice(object):
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"""
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IOU device implementation.
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:param path: path to IOU executable
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:param working_dir: path to a working directory
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:param host: host/address to bind for console and UDP connections
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:param name: name of this IOU device
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"""
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_instances = []
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def __init__(self, path, working_dir, host="127.0.0.1", name=None):
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# find an instance identifier (0 < id <= 512)
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self._id = 0
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for identifier in range(1, 513):
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if identifier not in self._instances:
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self._id = identifier
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self._instances.append(self._id)
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break
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if self._id == 0:
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raise IOUError("Maximum number of IOU instances reached")
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if name:
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self._name = name
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else:
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self._name = "IOU{}".format(self._id)
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self._path = path
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self._iourc = ""
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self._iouyap = ""
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self._console = None
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self._working_dir = None
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self._command = []
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self._process = None
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self._iouyap_process = None
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self._iou_stdout_file = ""
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self._iouyap_stdout_file = ""
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self._ioucon_thead = None
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self._ioucon_thread_stop_event = None
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self._host = host
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self._started = False
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# IOU settings
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self._ethernet_adapters = [EthernetAdapter(), EthernetAdapter()] # one adapter = 4 interfaces
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self._serial_adapters = [SerialAdapter(), SerialAdapter()] # one adapter = 4 interfaces
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self._slots = self._ethernet_adapters + self._serial_adapters
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self._nvram = 128 # Kilobytes
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self._startup_config = ""
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self._ram = 256 # Megabytes
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# update the working directory
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self.working_dir = working_dir
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log.info("IOU device {name} [id={id}] has been created".format(name=self._name,
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id=self._id))
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def defaults(self):
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"""
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Returns all the default attribute values for IOU.
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:returns: default values (dictionary)
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"""
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iou_defaults = {"name": self._name,
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"path": self._path,
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"startup_config": self._startup_config,
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"ram": self._ram,
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"nvram": self._nvram,
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"ethernet_adapters": len(self._ethernet_adapters),
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"serial_adapters": len(self._serial_adapters),
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"console": self._console}
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return iou_defaults
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@property
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def id(self):
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"""
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Returns the unique ID for this IOU device.
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:returns: id (integer)
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"""
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return(self._id)
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@classmethod
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def reset(cls):
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"""
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Resets allocated instance list.
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"""
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cls._instances.clear()
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@property
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def name(self):
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"""
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Returns the name of this IOU device.
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:returns: name
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"""
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return self._name
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@name.setter
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def name(self, new_name):
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"""
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Sets the name of this IOU device.
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:param new_name: name
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"""
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self._name = new_name
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log.info("IOU {name} [id={id}]: renamed to {new_name}".format(name=self._name,
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id=self._id,
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new_name=new_name))
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@property
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def path(self):
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"""
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Returns the path to the IOU executable.
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:returns: path to IOU
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"""
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return(self._path)
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@path.setter
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def path(self, path):
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"""
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Sets the path to the IOU executable.
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:param path: path to IOU
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"""
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self._path = path
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log.info("IOU {name} [id={id}]: path changed to {path}".format(name=self._name,
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id=self._id,
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path=path))
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@property
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def iourc(self):
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"""
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Returns the path to the iourc file.
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:returns: path to the iourc file
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"""
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return(self._iourc)
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@iourc.setter
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def iourc(self, iourc):
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"""
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Sets the path to the iourc file.
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:param path: path to the iourc file.
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"""
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self._iourc = iourc
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log.info("IOU {name} [id={id}]: iourc file path set to {path}".format(name=self._name,
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id=self._id,
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path=self._iourc))
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@property
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def iouyap(self):
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"""
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Returns the path to iouyap
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:returns: path to iouyap
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"""
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return(self._iouyap)
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@iouyap.setter
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def iouyap(self, iouyap):
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"""
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Sets the path to iouyap.
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:param path: path to iouyap
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"""
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self._iouyap = iouyap
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log.info("IOU {name} [id={id}]: iouyap path set to {path}".format(name=self._name,
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id=self._id,
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path=self._iouyap))
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@property
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def working_dir(self):
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"""
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Returns current working directory
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:returns: path to the working directory
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"""
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return self._working_dir
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@working_dir.setter
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def working_dir(self, working_dir):
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"""
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Sets the working directory for IOU.
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:param working_dir: path to the working directory
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"""
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# create our own working directory
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working_dir = os.path.join(working_dir, "device-{}".format(self._id))
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if not os.path.exists(working_dir):
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try:
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os.makedirs(working_dir)
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except OSError as e:
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raise IOUError("Could not create working directory {}: {}".format(working_dir, e))
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self._working_dir = working_dir
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log.info("IOU {name} [id={id}]: working directory changed to {wd}".format(name=self._name,
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id=self._id,
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wd=self._working_dir))
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@property
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def console(self):
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"""
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Returns the TCP console port.
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:returns: console port (integer)
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"""
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return self._console
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@console.setter
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def console(self, console):
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"""
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Sets the TCP console port.
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:param console: console port (integer)
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"""
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self._console = console
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log.info("IOU {name} [id={id}]: console port set to {port}".format(name=self._name,
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id=self._id,
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port=console))
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def command(self):
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"""
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Returns the IOU command line.
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:returns: IOU command line (string)
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"""
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return " ".join(self._build_command())
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def delete(self):
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"""
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Deletes this IOU device.
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"""
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self.stop()
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self._instances.remove(self._id)
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log.info("IOU device {name} [id={id}] has been deleted".format(name=self._name,
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id=self._id))
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@property
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def started(self):
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"""
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Returns either this IOU device has been started or not.
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:returns: boolean
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"""
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return self._started
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def _update_iouyap_config(self):
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"""
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Updates the iouyap.ini file.
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"""
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iouyap_ini = os.path.join(self._working_dir, "iouyap.ini")
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config = configparser.ConfigParser()
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config["default"] = {"netmap": "NETMAP",
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"base_port": "49000"}
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bay_id = 0
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for adapter in self._slots:
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unit_id = 0
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for unit in adapter.ports.keys():
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nio = adapter.get_nio(unit)
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if nio:
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if isinstance(nio, NIO_UDP):
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# UDP tunnel
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connection = {"tunnel_udp": "{lport}:{rhost}:{rport}".format(lport=nio.lport,
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rhost=nio.rhost,
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rport=nio.rport)}
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elif isinstance(nio, NIO_TAP):
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# TAP interface
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connection = {"tap_dev": "{tap_device}".format(tap_device=nio.tap_device)}
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elif isinstance(nio, NIO_GenericEthernet):
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# Ethernet interface
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connection = {"eth_dev": "{ethernet_device}".format(ethernet_device=nio.ethernet_device)}
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config["{iouyap_id}:{bay}/{unit}".format(iouyap_id=str(self._id + 512), bay=bay_id, unit=unit_id)] = connection
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unit_id += 1
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bay_id += 1
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try:
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with open(iouyap_ini, "w") as config_file:
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config.write(config_file)
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log.info("IOU {name} [id={id}]: iouyap.ini updated".format(name=self._name,
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id=self._id))
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except OSError as e:
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raise IOUError("Could not create {}: {}".format(iouyap_ini, e))
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def _create_netmap_config(self):
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"""
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Creates the NETMAP file.
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"""
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netmap_path = os.path.join(self._working_dir, "NETMAP")
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try:
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with open(netmap_path, "w") as f:
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for bay in range(0, 16):
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for unit in range(0, 4):
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f.write("{iouyap_id}:{bay}/{unit}{iou_id:>5d}:{bay}/{unit}\n".format(iouyap_id=str(self._id + 512),
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bay=bay,
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unit=unit,
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iou_id=self._id))
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log.info("IOU {name} [id={id}]: NETMAP file created".format(name=self._name,
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id=self._id))
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except OSError as e:
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raise IOUError("Could not create {}: {}".format(netmap_path, e))
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def _start_ioucon(self):
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"""
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Starts ioucon thread (for console connections).
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"""
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if not self._ioucon_thead:
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telnet_server = "{}:{}".format(self._host, self._console)
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log.info("starting ioucon for IOU instance {} to accept Telnet connections on {}".format(self._name, telnet_server))
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args = argparse.Namespace(appl_id=str(self._id), debug=False, escape='^^', telnet_limit=0, telnet_server=telnet_server)
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self._ioucon_thread_stop_event = threading.Event()
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self._ioucon_thead = threading.Thread(target=start_ioucon, args=(args, self._ioucon_thread_stop_event))
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self._ioucon_thead.start()
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def _start_iouyap(self):
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"""
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Starts iouyap (handles connections to and from this IOU device).
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"""
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try:
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self._update_iouyap_config()
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command = [self._iouyap, str(self._id + 512)] # iouyap has always IOU ID + 512
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log.info("starting iouyap: {}".format(command))
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self._iouyap_stdout_file = os.path.join(self._working_dir, "iouyap.log")
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log.info("logging to {}".format(self._iouyap_stdout_file))
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with open(self._iouyap_stdout_file, "w") as fd:
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self._iouyap_process = subprocess.Popen(command,
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stdout=fd,
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stderr=subprocess.STDOUT,
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cwd=self._working_dir)
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log.info("iouyap started PID={}".format(self._iouyap_process.pid))
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except OSError as e:
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log.error("could not start iouyap: {}".format(e))
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raise IOUError("Could not start iouyap: {}".format(e))
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def start(self):
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"""
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Starts the IOU process.
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"""
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if not self.is_running():
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if not self._iourc or not os.path.exists(self._iourc):
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raise IOUError("A iourc file is necessary to start IOU")
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if not self._iouyap or not os.path.exists(self._iouyap):
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raise IOUError("iouyap is necessary to start IOU")
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self._create_netmap_config()
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# created a environment variable pointing to the iourc file.
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env = os.environ.copy()
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env["IOURC"] = self._iourc
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self._command = self._build_command()
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try:
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log.info("starting IOU: {}".format(self._command))
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self._iou_stdout_file = os.path.join(self._working_dir, "iou.log")
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log.info("logging to {}".format(self._iou_stdout_file))
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with open(self._iou_stdout_file, "w") as fd:
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self._process = subprocess.Popen(self._command,
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stdout=fd,
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stderr=subprocess.STDOUT,
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cwd=self._working_dir,
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env=env)
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log.info("IOU instance {} started PID={}".format(self._id, self._process.pid))
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self._started = True
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except OSError as e:
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log.error("could not start IOU: {}".format(e))
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raise IOUError("could not start IOU: {}".format(e))
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# start console support
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self._start_ioucon()
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# connections support
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self._start_iouyap()
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def stop(self):
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"""
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Stops the IOU process.
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"""
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# stop the IOU process
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if self.is_running():
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log.info("stopping IOU instance {} PID={}".format(self._id, self._process.pid))
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try:
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self._process.terminate()
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self._process.wait(1)
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except subprocess.TimeoutExpired:
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self._process.kill()
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if self._process.poll() == None:
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log.warn("IOU instance {} PID={} is still running".format(self._id,
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self._process.pid))
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self._process = None
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self._started = False
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# stop console support
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if self._ioucon_thead:
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self._ioucon_thread_stop_event.set()
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if self._ioucon_thead.is_alive():
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self._ioucon_thead.join(timeout=0.10)
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self._ioucon_thead = None
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# stop iouyap
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if self.is_iouyap_running():
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log.info("stopping iouyap PID={} for IOU instance {}".format(self._iouyap_process.pid, self._id))
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try:
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self._iouyap_process.terminate()
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self._iouyap_process.wait(1)
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except subprocess.TimeoutExpired:
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self._iouyap_process.kill()
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if self._iouyap_process.poll() == None:
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log.warn("iouyap PID={} for IOU instance {} is still running".format(self._iouyap_process.pid,
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self._id))
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self._iouyap_process = None
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def read_iou_stdout(self):
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"""
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Reads the standard output of the IOU process.
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Only use when the process has been stopped or has crashed.
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"""
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output = ""
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if self._iou_stdout_file:
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try:
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with open(self._iou_stdout_file) as file:
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output = file.read()
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except OSError as e:
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log.warn("could not read {}: {}".format(self._iou_stdout_file, e))
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return output
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def read_iouyap_stdout(self):
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"""
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Reads the standard output of the iouyap process.
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Only use when the process has been stopped or has crashed.
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"""
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output = ""
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if self._iouyap_stdout_file:
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try:
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with open(self._iouyap_stdout_file) as file:
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output = file.read()
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except OSError as e:
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log.warn("could not read {}: {}".format(self._iouyap_stdout_file, e))
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return output
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def is_running(self):
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"""
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Checks if the IOU process is running
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:returns: True or False
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"""
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if self._process and self._process.poll() == None:
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return True
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return False
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def is_iouyap_running(self):
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"""
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Checks if the iouyap process is running
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:returns: True or False
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"""
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if self._iouyap_process and self._iouyap_process.poll() == None:
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return True
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return False
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def slot_add_nio_binding(self, slot_id, port_id, nio):
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"""
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Adds a slot NIO binding.
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:param slot_id: slot ID
|
|
:param port_id: port ID
|
|
:param nio: NIO instance to add to the slot/port
|
|
"""
|
|
|
|
try:
|
|
adapter = self._slots[slot_id]
|
|
except IndexError:
|
|
raise IOUError("Slot {slot_id} doesn't exist on IOU {name}".format(name=self._name,
|
|
slot_id=slot_id))
|
|
|
|
if not adapter.port_exists(port_id):
|
|
raise IOUError("Port {port_id} doesn't exist in adapter {adapter}".format(adapter=adapter,
|
|
port_id=port_id))
|
|
|
|
adapter.add_nio(port_id, nio)
|
|
log.info("IOU {name} [id={id}]: {nio} added to {slot_id}/{port_id}".format(name=self._name,
|
|
id=self._id,
|
|
nio=nio,
|
|
slot_id=slot_id,
|
|
port_id=port_id))
|
|
if self.is_iouyap_running():
|
|
self._update_iouyap_config()
|
|
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
|
|
|
def slot_remove_nio_binding(self, slot_id, port_id):
|
|
"""
|
|
Removes a slot NIO binding.
|
|
|
|
:param slot_id: slot ID
|
|
:param port_id: port ID
|
|
"""
|
|
|
|
try:
|
|
adapter = self._slots[slot_id]
|
|
except IndexError:
|
|
raise IOUError("Slot {slot_id} doesn't exist on IOU {name}".format(name=self._name,
|
|
slot_id=slot_id))
|
|
|
|
if not adapter.port_exists(port_id):
|
|
raise IOUError("Port {port_id} doesn't exist in adapter {adapter}".format(adapter=adapter,
|
|
port_id=port_id))
|
|
|
|
nio = adapter.get_nio(port_id)
|
|
adapter.remove_nio(port_id)
|
|
log.info("IOU {name} [id={id}]: {nio} removed from {slot_id}/{port_id}".format(name=self._name,
|
|
id=self._id,
|
|
nio=nio,
|
|
slot_id=slot_id,
|
|
port_id=port_id))
|
|
if self.is_iouyap_running():
|
|
self._update_iouyap_config()
|
|
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
|
|
|
def _build_command(self):
|
|
"""
|
|
Command to start the IOU process.
|
|
(to be passed to subprocess.Popen())
|
|
|
|
IOU command line:
|
|
Usage: <image> [options] <application id>
|
|
<image>: unix-js-m | unix-is-m | unix-i-m | ...
|
|
<application id>: instance identifier (0 < id <= 1024)
|
|
Options:
|
|
-e <n> Number of Ethernet interfaces (default 2)
|
|
-s <n> Number of Serial interfaces (default 2)
|
|
-n <n> Size of nvram in Kb (default 64KB)
|
|
-b <string> IOS debug string
|
|
-c <name> Configuration file name
|
|
-d Generate debug information
|
|
-t Netio message trace
|
|
-q Suppress informational messages
|
|
-h Display this help
|
|
-C Turn off use of host clock
|
|
-m <n> Megabytes of router memory (default 256MB)
|
|
-L Disable local console, use remote console
|
|
-l Enable Layer 1 keepalive messages
|
|
-u <n> UDP port base for distributed networks
|
|
-R Ignore options from the IOURC file
|
|
-U Disable unix: file system location
|
|
-W Disable watchdog timer
|
|
-N Ignore the NETMAP file
|
|
"""
|
|
|
|
#TODO: add support for keepalive and watchdog
|
|
command = [self._path]
|
|
if len(self._ethernet_adapters) != 2:
|
|
command.extend(["-e", str(len(self._ethernet_adapters))])
|
|
if len(self._serial_adapters) != 2:
|
|
command.extend(["-s", str(len(self._serial_adapters))])
|
|
command.extend(["-n", str(self._nvram)])
|
|
command.extend(["-m", str(self._ram)])
|
|
command.extend(["-L"]) # disable local console, use remote console
|
|
if self._startup_config:
|
|
command.extend(["-c", self._startup_config])
|
|
command.extend([str(self._id)])
|
|
return command
|
|
|
|
@property
|
|
def ram(self):
|
|
"""
|
|
Returns the amount of RAM allocated to this IOU instance.
|
|
|
|
:returns: amount of RAM in Mbytes (integer)
|
|
"""
|
|
|
|
return self._ram
|
|
|
|
@ram.setter
|
|
def ram(self, ram):
|
|
"""
|
|
Sets amount of RAM allocated to this IOU instance.
|
|
|
|
:param ram: amount of RAM in Mbytes (integer)
|
|
"""
|
|
|
|
if self._ram == ram:
|
|
return
|
|
|
|
log.info("IOU {name} [id={id}]: RAM updated from {old_ram}MB to {new_ram}MB".format(name=self._name,
|
|
id=self._id,
|
|
old_ram=self._ram,
|
|
new_ram=ram))
|
|
|
|
self._ram = ram
|
|
|
|
@property
|
|
def nvram(self):
|
|
"""
|
|
Returns the mount of NVRAM allocated to this IOU instance.
|
|
|
|
:returns: amount of NVRAM in Kbytes (integer)
|
|
"""
|
|
|
|
return self._nvram
|
|
|
|
@nvram.setter
|
|
def nvram(self, nvram):
|
|
"""
|
|
Sets amount of NVRAM allocated to this IOU instance.
|
|
|
|
:param nvram: amount of NVRAM in Kbytes (integer)
|
|
"""
|
|
|
|
if self._nvram == nvram:
|
|
return
|
|
|
|
log.info("IOU {name} [id={id}]: NVRAM updated from {old_nvram}KB to {new_nvram}KB".format(name=self._name,
|
|
id=self._id,
|
|
old_nvram=self._nvram,
|
|
new_nvram=nvram))
|
|
self._nvram = nvram
|
|
|
|
@property
|
|
def startup_config(self):
|
|
"""
|
|
Returns the startup-config for this IOU instance.
|
|
|
|
:returns: path to startup-config file
|
|
"""
|
|
|
|
return self._startup_config
|
|
|
|
@startup_config.setter
|
|
def startup_config(self, startup_config):
|
|
"""
|
|
Sets the startup-config for this IOU instance.
|
|
|
|
:param startup_config: path to startup-config file
|
|
"""
|
|
|
|
self._startup_config = startup_config
|
|
log.info("IOU {name} [id={id}]: startup_config set to {config}".format(name=self._name,
|
|
id=self._id,
|
|
config=self._startup_config))
|
|
|
|
@property
|
|
def ethernet_adapters(self):
|
|
"""
|
|
Returns the number of Ethernet adapters for this IOU instance.
|
|
|
|
:returns: number of adapters
|
|
"""
|
|
|
|
return len(self._ethernet_adapters)
|
|
|
|
@ethernet_adapters.setter
|
|
def ethernet_adapters(self, ethernet_adapters):
|
|
"""
|
|
Sets the number of Ethernet adapters for this IOU instance.
|
|
|
|
:param ethernet_adapters: number of adapters
|
|
"""
|
|
|
|
self._ethernet_adapters.clear()
|
|
for _ in range(0, ethernet_adapters):
|
|
self._ethernet_adapters.append(EthernetAdapter())
|
|
|
|
log.info("IOU {name} [id={id}]: number of Ethernet adapters changed to {adapters}".format(name=self._name,
|
|
id=self._id,
|
|
adapters=len(self._ethernet_adapters)))
|
|
|
|
self._slots = self._ethernet_adapters + self._serial_adapters
|
|
|
|
@property
|
|
def serial_adapters(self):
|
|
"""
|
|
Returns the number of Serial adapters for this IOU instance.
|
|
|
|
:returns: number of adapters
|
|
"""
|
|
|
|
return len(self._serial_adapters)
|
|
|
|
@serial_adapters.setter
|
|
def serial_adapters(self, serial_adapters):
|
|
"""
|
|
Sets the number of Serial adapters for this IOU instance.
|
|
|
|
:param serial_adapters: number of adapters
|
|
"""
|
|
|
|
self._serial_adapters.clear()
|
|
for _ in range(0, serial_adapters):
|
|
self._serial_adapters.append(SerialAdapter())
|
|
|
|
log.info("IOU {name} [id={id}]: number of Serial adapters changed to {adapters}".format(name=self._name,
|
|
id=self._id,
|
|
adapters=len(self._serial_adapters)))
|
|
|
|
self._slots = self._ethernet_adapters + self._serial_adapters
|
|
|
|
@staticmethod
|
|
def find_unused_port(start_port, end_port, host='127.0.0.1', socket_type="TCP"):
|
|
"""
|
|
Finds an unused port in the specified range.
|
|
|
|
:param start_port: first port in the range
|
|
:param end_port: last port in the range
|
|
:param host: host/address for bind()
|
|
:param socket_type: TCP (default) or UDP
|
|
"""
|
|
|
|
if socket_type == "UDP":
|
|
socket_type = socket.SOCK_DGRAM
|
|
else:
|
|
socket_type = socket.SOCK_STREAM
|
|
|
|
for port in range(start_port, end_port):
|
|
if port > end_port:
|
|
raise IOUError("Could not find a free port between {0} and {1}".format(start_port, end_port))
|
|
try:
|
|
if ":" in host:
|
|
# IPv6 address support
|
|
with socket.socket(socket.AF_INET6, socket_type) as s:
|
|
s.bind((host, port)) # the port is available if bind is a success
|
|
else:
|
|
with socket.socket(socket.AF_INET, socket_type) as s:
|
|
s.bind((host, port)) # the port is available if bind is a success
|
|
return port
|
|
except socket.error as e:
|
|
if e.errno == errno.EADDRINUSE: # socket already in use
|
|
continue
|
|
else:
|
|
raise IOUError("Could not find an unused port: {}".format(e))
|