mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-24 17:28:08 +00:00
1304 lines
53 KiB
Python
1304 lines
53 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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 VM management (creates command line, processes, files etc.) in
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order to run an IOU VM.
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"""
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import os
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import signal
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import socket
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import re
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import asyncio
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import subprocess
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import shutil
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import argparse
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import threading
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import configparser
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import struct
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import hashlib
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import glob
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import binascii
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import functools
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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 NIOUDP
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from ..nios.nio_tap import NIOTAP
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from ..nios.nio_generic_ethernet import NIOGenericEthernet
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from ..base_vm import BaseVM
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from .utils.iou_import import nvram_import
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from .utils.iou_export import nvram_export
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from .ioucon import start_ioucon
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import gns3server.utils.asyncio
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import gns3server.utils.images
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import logging
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import sys
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log = logging.getLogger(__name__)
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class IOUVM(BaseVM):
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module_name = 'iou'
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"""
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IOU VM implementation.
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:param name: IOU VM name
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:param vm_id: IOU VM identifier
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:param project: Project instance
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:param manager: Manager instance
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:param console: TCP console port
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"""
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def __init__(self, name, vm_id, project, manager, console=None):
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super().__init__(name, vm_id, project, manager, console=console)
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self._iouyap_process = None
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self._iou_process = None
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self._iou_stdout_file = ""
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self._started = False
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self._path = None
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self._ioucon_thread = None
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# IOU settings
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self._ethernet_adapters = []
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self._serial_adapters = []
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self.ethernet_adapters = 2 # one adapter = 4 interfaces
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self.serial_adapters = 2 # one adapter = 4 interfaces
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self._use_default_iou_values = True # for RAM & NVRAM values
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self._nvram = 128 # Kilobytes
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self._startup_config = ""
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self._private_config = ""
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self._ram = 256 # Megabytes
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self._l1_keepalives = False # used to overcome the always-up Ethernet interfaces (not supported by all IOSes).
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@asyncio.coroutine
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def close(self):
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"""
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Closes this IOU VM.
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"""
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if not (yield from super().close()):
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return False
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adapters = self._ethernet_adapters + self._serial_adapters
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for adapter in adapters:
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if adapter is not None:
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for nio in adapter.ports.values():
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if nio and isinstance(nio, NIOUDP):
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self.manager.port_manager.release_udp_port(nio.lport, self._project)
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yield from self.stop()
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self.save_configs()
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@property
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def path(self):
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"""
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Path of the IOU executable.
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:returns: path to the IOU image executable
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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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Path of the IOU executable.
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:param path: path to the IOU image executable
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"""
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self._path = self.manager.get_abs_image_path(path)
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# In 1.2 users uploaded images to the images roots
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# after the migration their images are inside images/IOU
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# but old topologies use old path
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if "IOU" not in self._path:
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location, filename = os.path.split(self._path)
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fix_path = os.path.join(location, "IOU", filename)
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if os.path.isfile(fix_path):
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self._path = fix_path
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@property
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def use_default_iou_values(self):
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"""
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Returns if this device uses the default IOU image values.
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:returns: boolean
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"""
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return self._use_default_iou_values
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@use_default_iou_values.setter
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def use_default_iou_values(self, state):
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"""
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Sets if this device uses the default IOU image values.
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:param state: boolean
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"""
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self._use_default_iou_values = state
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if state:
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log.info('IOU "{name}" [{id}]: uses the default IOU image values'.format(name=self._name, id=self._id))
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else:
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log.info('IOU "{name}" [{id}]: does not use the default IOU image values'.format(name=self._name, id=self._id))
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def _check_requirements(self):
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"""
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Checks if IOUYAP executable is available and if image is accessible.
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"""
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if not os.path.isfile(self._path) or not os.path.exists(self._path):
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if os.path.islink(self._path):
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raise IOUError("IOU image '{}' linked to '{}' is not accessible".format(self._path, os.path.realpath(self._path)))
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else:
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raise IOUError("IOU image '{}' is not accessible".format(self._path))
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try:
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with open(self._path, "rb") as f:
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# read the first 7 bytes of the file.
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elf_header_start = f.read(7)
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except OSError as e:
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raise IOUError("Cannot read ELF header for IOU image '{}': {}".format(self._path, e))
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# IOU images must start with the ELF magic number, be 32-bit, little endian
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# and have an ELF version of 1 normal IOS image are big endian!
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if elf_header_start != b'\x7fELF\x01\x01\x01':
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raise IOUError("'{}' is not a valid IOU image".format(self._path))
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if not os.access(self._path, os.X_OK):
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raise IOUError("IOU image '{}' is not executable".format(self._path))
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path = self.iouyap_path
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if not path:
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raise IOUError("No path to iouyap program has been set")
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if not os.path.isfile(path):
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raise IOUError("iouyap program '{}' is not accessible".format(path))
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if not os.access(path, os.X_OK):
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raise IOUError("iouyap program '{}' is not executable".format(path))
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def __json__(self):
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iou_vm_info = {"name": self.name,
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"vm_id": self.id,
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"vm_directory": self.working_dir,
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"console": self._console,
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"project_id": self.project.id,
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"path": self.path,
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"md5sum": gns3server.utils.images.md5sum(self.path),
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"ethernet_adapters": len(self._ethernet_adapters),
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"serial_adapters": len(self._serial_adapters),
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"ram": self._ram,
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"nvram": self._nvram,
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"l1_keepalives": self._l1_keepalives,
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"startup_config": self.relative_startup_config_file,
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"private_config": self.relative_private_config_file,
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"iourc_path": self.iourc_path,
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"use_default_iou_values": self._use_default_iou_values,
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"command_line": self.command_line}
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# return the relative path if the IOU image is in the images_path directory
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iou_vm_info["path"] = self.manager.get_relative_image_path(self.path)
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return iou_vm_info
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@property
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def iouyap_path(self):
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"""
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Returns the IOUYAP executable path.
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:returns: path to IOUYAP
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"""
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path = self._manager.config.get_section_config("IOU").get("iouyap_path", "iouyap")
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if path == "iouyap":
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path = shutil.which("iouyap")
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return path
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@property
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def iourc_path(self):
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"""
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Returns the IOURC file path.
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:returns: path to IOURC
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"""
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iourc_path = self._manager.config.get_section_config("IOU").get("iourc_path")
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if not iourc_path:
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# look for the iourc file in the user home dir.
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path = os.path.join(os.path.expanduser("~/"), ".iourc")
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if os.path.exists(path):
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return path
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# look for the iourc file in the current working dir.
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path = os.path.join(self.working_dir, "iourc")
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if os.path.exists(path):
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return path
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# look for the iourc file in the temporary dir.
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path = os.path.join(self.temporary_directory, "iourc")
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if os.path.exists(path):
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return path
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return iourc_path
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@property
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def ram(self):
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"""
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Returns the amount of RAM allocated to this IOU VM.
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:returns: amount of RAM in MBytes (integer)
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"""
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return self._ram
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@ram.setter
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def ram(self, ram):
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"""
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Sets amount of RAM allocated to this IOU instance.
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:param ram: amount of RAM in MBytes (integer)
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"""
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if self._ram == ram:
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return
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log.info('IOU "{name}" [{id}]: RAM updated from {old_ram}MB to {new_ram}MB'.format(name=self._name,
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id=self._id,
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old_ram=self._ram,
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new_ram=ram))
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self._ram = ram
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@property
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def nvram(self):
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"""
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Returns the mount of NVRAM allocated to this IOU instance.
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:returns: amount of NVRAM in KBytes (integer)
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"""
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return self._nvram
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@nvram.setter
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def nvram(self, nvram):
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"""
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Sets amount of NVRAM allocated to this IOU instance.
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:param nvram: amount of NVRAM in KBytes (integer)
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"""
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if self._nvram == nvram:
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return
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log.info('IOU "{name}" [{id}]: NVRAM updated from {old_nvram}KB to {new_nvram}KB'.format(name=self._name,
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id=self._id,
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old_nvram=self._nvram,
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new_nvram=nvram))
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self._nvram = nvram
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@BaseVM.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 VM.
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:param new_name: name
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"""
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if self.startup_config_file:
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content = self.startup_config_content
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content = content.replace(self._name, new_name)
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self.startup_config_content = content
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super(IOUVM, IOUVM).name.__set__(self, new_name)
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@property
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def application_id(self):
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return self._manager.get_application_id(self.id)
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@property
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def iourc_content(self):
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try:
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with open(os.path.join(self.temporary_directory, "iourc"), "rb") as f:
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return f.read().decode("utf-8")
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except OSError:
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return None
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@iourc_content.setter
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def iourc_content(self, value):
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if value is not None:
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path = os.path.join(self.temporary_directory, "iourc")
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try:
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with open(path, "wb+") as f:
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f.write(value.encode("utf-8"))
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except OSError as e:
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raise IOUError("Could not write the iourc file {}: {}".format(path, e))
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@asyncio.coroutine
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def _library_check(self):
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"""
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Checks for missing shared library dependencies in the IOU image.
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"""
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try:
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output = yield from gns3server.utils.asyncio.subprocess_check_output("ldd", self._path)
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except (FileNotFoundError, subprocess.SubprocessError) as e:
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log.warn("Could not determine the shared library dependencies for {}: {}".format(self._path, e))
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return
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p = re.compile("([\.\w]+)\s=>\s+not found")
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missing_libs = p.findall(output)
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if missing_libs:
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raise IOUError("The following shared library dependencies cannot be found for IOU image {}: {}".format(self._path,
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", ".join(missing_libs)))
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@asyncio.coroutine
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def _check_iou_licence(self):
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"""
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Checks for a valid IOU key in the iourc file (paranoid mode).
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"""
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license_check = self._manager.config.get_section_config("IOU").getboolean("license_check", True)
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if license_check is False:
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return
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config = configparser.ConfigParser()
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try:
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with open(self.iourc_path, encoding="utf-8") as f:
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config.read_file(f)
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except OSError as e:
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raise IOUError("Could not open iourc file {}: {}".format(self.iourc_path, e))
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except configparser.Error as e:
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raise IOUError("Could not parse iourc file {}: {}".format(self.iourc_path, e))
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except UnicodeDecodeError as e:
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raise IOUError("Non ascii characters in iourc file {}, please remove them: {}".format(self.iourc_path, e))
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if "license" not in config:
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raise IOUError("License section not found in iourc file {}".format(self.iourc_path))
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hostname = socket.gethostname()
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if hostname not in config["license"]:
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raise IOUError("Hostname \"{}\" not found in iourc file {}".format(hostname, self.iourc_path))
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user_ioukey = config["license"][hostname]
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if user_ioukey[-1:] != ';':
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raise IOUError("IOU key not ending with ; in iourc file {}".format(self.iourc_path))
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if len(user_ioukey) != 17:
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raise IOUError("IOU key length is not 16 characters in iourc file {}".format(self.iourc_path))
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user_ioukey = user_ioukey[:16]
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# We can't test this because it's mean distributing a valid licence key
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# in tests or generating one
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if not hasattr(sys, "_called_from_test"):
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try:
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hostid = (yield from gns3server.utils.asyncio.subprocess_check_output("hostid")).strip()
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except FileNotFoundError as e:
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raise IOUError("Could not find hostid: {}".format(e))
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except subprocess.SubprocessError as e:
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raise IOUError("Could not execute hostid: {}".format(e))
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try:
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ioukey = int(hostid, 16)
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except ValueError:
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raise IOUError("Invalid hostid detected: {}".format(hostid))
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for x in hostname:
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ioukey += ord(x)
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pad1 = b'\x4B\x58\x21\x81\x56\x7B\x0D\xF3\x21\x43\x9B\x7E\xAC\x1D\xE6\x8A'
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pad2 = b'\x80' + 39 * b'\0'
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ioukey = hashlib.md5(pad1 + pad2 + struct.pack('!I', ioukey) + pad1).hexdigest()[:16]
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if ioukey != user_ioukey:
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raise IOUError("Invalid IOU license key {} detected in iourc file {} for host {}".format(user_ioukey,
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self.iourc_path,
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hostname))
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def _push_configs_to_nvram(self):
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"""
|
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Push the startup-config and private-config content to the NVRAM.
|
||
"""
|
||
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||
startup_config_content = self.startup_config_content
|
||
if startup_config_content:
|
||
nvram_file = os.path.join(self.working_dir, "nvram_{:05d}".format(self.application_id))
|
||
try:
|
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if not os.path.exists(nvram_file):
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open(nvram_file, "a").close()
|
||
nvram_content = None
|
||
else:
|
||
with open(nvram_file, "rb") as file:
|
||
nvram_content = file.read()
|
||
except OSError as e:
|
||
raise IOUError("Cannot read nvram file {}: {}".format(nvram_file, e))
|
||
|
||
startup_config_content = startup_config_content.encode("utf-8")
|
||
private_config_content = self.private_config_content
|
||
if private_config_content is not None:
|
||
private_config_content = private_config_content.encode("utf-8")
|
||
try:
|
||
nvram_content = nvram_import(nvram_content, startup_config_content, private_config_content, self.nvram)
|
||
except ValueError as e:
|
||
raise IOUError("Cannot push configs to nvram {}: {}".format(nvram_file, e))
|
||
try:
|
||
with open(nvram_file, "wb") as file:
|
||
file.write(nvram_content)
|
||
except OSError as e:
|
||
raise IOUError("Cannot write nvram file {}: {}".format(nvram_file, e))
|
||
|
||
@asyncio.coroutine
|
||
def start(self):
|
||
"""
|
||
Starts the IOU process.
|
||
"""
|
||
|
||
self._check_requirements()
|
||
if not self.is_running():
|
||
|
||
yield from self._library_check()
|
||
|
||
try:
|
||
self._rename_nvram_file()
|
||
except OSError as e:
|
||
raise IOUError("Could not rename nvram files: {}".format(e))
|
||
|
||
iourc_path = self.iourc_path
|
||
if not iourc_path:
|
||
raise IOUError("Could not find an iourc file (IOU license)")
|
||
if not os.path.isfile(iourc_path):
|
||
raise IOUError("The iourc path '{}' is not a regular file".format(iourc_path))
|
||
|
||
yield from self._check_iou_licence()
|
||
iouyap_path = self.iouyap_path
|
||
if not iouyap_path or not os.path.isfile(iouyap_path):
|
||
raise IOUError("iouyap is necessary to start IOU")
|
||
|
||
self._create_netmap_config()
|
||
self._push_configs_to_nvram()
|
||
|
||
# check if there is enough RAM to run
|
||
self.check_available_ram(self.ram)
|
||
|
||
# created a environment variable pointing to the iourc file.
|
||
env = os.environ.copy()
|
||
|
||
if "IOURC" not in os.environ:
|
||
env["IOURC"] = iourc_path
|
||
command = yield from self._build_command()
|
||
try:
|
||
log.info("Starting IOU: {}".format(command))
|
||
self._iou_stdout_file = os.path.join(self.working_dir, "iou.log")
|
||
log.info("Logging to {}".format(self._iou_stdout_file))
|
||
with open(self._iou_stdout_file, "w", encoding="utf-8") as fd:
|
||
self.command_line = ' '.join(command)
|
||
self._iou_process = yield from asyncio.create_subprocess_exec(*command,
|
||
stdout=fd,
|
||
stderr=subprocess.STDOUT,
|
||
cwd=self.working_dir,
|
||
env=env)
|
||
log.info("IOU instance {} started PID={}".format(self._id, self._iou_process.pid))
|
||
self._started = True
|
||
self.status = "started"
|
||
callback = functools.partial(self._termination_callback, "IOU")
|
||
gns3server.utils.asyncio.monitor_process(self._iou_process, callback)
|
||
except FileNotFoundError as e:
|
||
raise IOUError("Could not start IOU: {}: 32-bit binary support is probably not installed".format(e))
|
||
except (OSError, subprocess.SubprocessError) as e:
|
||
iou_stdout = self.read_iou_stdout()
|
||
log.error("Could not start IOU {}: {}\n{}".format(self._path, e, iou_stdout))
|
||
raise IOUError("Could not start IOU {}: {}\n{}".format(self._path, e, iou_stdout))
|
||
|
||
# start console support
|
||
self._start_ioucon()
|
||
# connections support
|
||
yield from self._start_iouyap()
|
||
|
||
def _termination_callback(self, process_name, returncode):
|
||
"""
|
||
Called when the process has stopped.
|
||
|
||
:param returncode: Process returncode
|
||
"""
|
||
|
||
log.info("{} process has stopped, return code: {}".format(process_name, returncode))
|
||
self._terminate_process_iou()
|
||
self._terminate_process_iouyap()
|
||
self._ioucon_thread_stop_event.set()
|
||
if returncode != 0:
|
||
self.project.emit("log.error", {"message": "{} process has stopped, return code: {}\n{}".format(process_name,
|
||
returncode,
|
||
self.read_iou_stdout())})
|
||
|
||
def _rename_nvram_file(self):
|
||
"""
|
||
Before starting the VM, rename the nvram and vlan.dat files with the correct IOU application identifier.
|
||
"""
|
||
|
||
destination = os.path.join(self.working_dir, "nvram_{:05d}".format(self.application_id))
|
||
for file_path in glob.glob(os.path.join(glob.escape(self.working_dir), "nvram_*")):
|
||
shutil.move(file_path, destination)
|
||
destination = os.path.join(self.working_dir, "vlan.dat-{:05d}".format(self.application_id))
|
||
for file_path in glob.glob(os.path.join(glob.escape(self.working_dir), "vlan.dat-*")):
|
||
shutil.move(file_path, destination)
|
||
|
||
@asyncio.coroutine
|
||
def _start_iouyap(self):
|
||
"""
|
||
Starts iouyap (handles connections to and from this IOU VM).
|
||
"""
|
||
|
||
try:
|
||
self._update_iouyap_config()
|
||
command = [self.iouyap_path, "-q", str(self.application_id + 512)] # iouyap has always IOU ID + 512
|
||
log.info("starting iouyap: {}".format(command))
|
||
self._iouyap_stdout_file = os.path.join(self.working_dir, "iouyap.log")
|
||
log.info("logging to {}".format(self._iouyap_stdout_file))
|
||
with open(self._iouyap_stdout_file, "w", encoding="utf-8") as fd:
|
||
self._iouyap_process = yield from asyncio.create_subprocess_exec(*command,
|
||
stdout=fd,
|
||
stderr=subprocess.STDOUT,
|
||
cwd=self.working_dir)
|
||
|
||
callback = functools.partial(self._termination_callback, "iouyap")
|
||
gns3server.utils.asyncio.monitor_process(self._iouyap_process, callback)
|
||
log.info("iouyap started PID={}".format(self._iouyap_process.pid))
|
||
except (OSError, subprocess.SubprocessError) as e:
|
||
iouyap_stdout = self.read_iouyap_stdout()
|
||
log.error("Could not start iouyap: {}\n{}".format(e, iouyap_stdout))
|
||
raise IOUError("Could not start iouyap: {}\n{}".format(e, iouyap_stdout))
|
||
|
||
def _update_iouyap_config(self):
|
||
"""
|
||
Updates the iouyap.ini file.
|
||
"""
|
||
|
||
iouyap_ini = os.path.join(self.working_dir, "iouyap.ini")
|
||
|
||
config = configparser.ConfigParser()
|
||
config["default"] = {"netmap": "NETMAP",
|
||
"base_port": "49000"}
|
||
|
||
bay_id = 0
|
||
for adapter in self._adapters:
|
||
unit_id = 0
|
||
for unit in adapter.ports.keys():
|
||
nio = adapter.get_nio(unit)
|
||
if nio:
|
||
connection = None
|
||
if isinstance(nio, NIOUDP):
|
||
# UDP tunnel
|
||
connection = {"tunnel_udp": "{lport}:{rhost}:{rport}".format(lport=nio.lport,
|
||
rhost=nio.rhost,
|
||
rport=nio.rport)}
|
||
elif isinstance(nio, NIOTAP):
|
||
# TAP interface
|
||
connection = {"tap_dev": "{tap_device}".format(tap_device=nio.tap_device)}
|
||
|
||
elif isinstance(nio, NIOGenericEthernet):
|
||
# Ethernet interface
|
||
connection = {"eth_dev": "{ethernet_device}".format(ethernet_device=nio.ethernet_device)}
|
||
|
||
if connection:
|
||
interface = "{iouyap_id}:{bay}/{unit}".format(iouyap_id=str(self.application_id + 512), bay=bay_id, unit=unit_id)
|
||
config[interface] = connection
|
||
|
||
if nio.capturing:
|
||
pcap_data_link_type = nio.pcap_data_link_type.upper()
|
||
if pcap_data_link_type == "DLT_PPP_SERIAL":
|
||
pcap_protocol = "ppp"
|
||
elif pcap_data_link_type == "DLT_C_HDLC":
|
||
pcap_protocol = "hdlc"
|
||
elif pcap_data_link_type == "DLT_FRELAY":
|
||
pcap_protocol = "fr"
|
||
else:
|
||
pcap_protocol = "ethernet"
|
||
capture_info = {"pcap_file": "{pcap_file}".format(pcap_file=nio.pcap_output_file),
|
||
"pcap_protocol": pcap_protocol,
|
||
"pcap_overwrite": "y"}
|
||
config[interface].update(capture_info)
|
||
|
||
unit_id += 1
|
||
bay_id += 1
|
||
|
||
try:
|
||
with open(iouyap_ini, "w", encoding="utf-8") as config_file:
|
||
config.write(config_file)
|
||
log.info("IOU {name} [id={id}]: iouyap.ini updated".format(name=self._name,
|
||
id=self._id))
|
||
except OSError as e:
|
||
raise IOUError("Could not create {}: {}".format(iouyap_ini, e))
|
||
|
||
@asyncio.coroutine
|
||
def stop(self):
|
||
"""
|
||
Stops the IOU process.
|
||
"""
|
||
|
||
if self.is_running():
|
||
# stop console support
|
||
if self._ioucon_thread:
|
||
self._ioucon_thread_stop_event.set()
|
||
if self._ioucon_thread.is_alive():
|
||
self._ioucon_thread.join(timeout=3.0) # wait for the thread to free the console port
|
||
self._ioucon_thread = None
|
||
|
||
self._terminate_process_iou()
|
||
if self._iou_process.returncode is None:
|
||
try:
|
||
yield from gns3server.utils.asyncio.wait_for_process_termination(self._iou_process, timeout=3)
|
||
except asyncio.TimeoutError:
|
||
if self._iou_process.returncode is None:
|
||
log.warn("IOU process {} is still running... killing it".format(self._iou_process.pid))
|
||
self._iou_process.kill()
|
||
self._iou_process = None
|
||
|
||
if self.is_iouyap_running():
|
||
self._terminate_process_iouyap()
|
||
try:
|
||
yield from gns3server.utils.asyncio.wait_for_process_termination(self._iouyap_process, timeout=3)
|
||
except asyncio.TimeoutError:
|
||
if self._iouyap_process.returncode is None:
|
||
log.warn("IOUYAP process {} is still running... killing it".format(self._iouyap_process.pid))
|
||
try:
|
||
self._iouyap_process.kill()
|
||
except ProcessLookupError:
|
||
pass
|
||
self._iouyap_process = None
|
||
|
||
self._started = False
|
||
|
||
def _terminate_process_iouyap(self):
|
||
"""
|
||
Terminate the IOUYAP process if running.
|
||
"""
|
||
|
||
if self._iouyap_process:
|
||
log.info('Stopping IOUYAP process for IOU VM "{}" PID={}'.format(self.name, self._iouyap_process.pid))
|
||
try:
|
||
self._iouyap_process.terminate()
|
||
# Sometime the process can already be dead when we garbage collect
|
||
except ProcessLookupError:
|
||
pass
|
||
|
||
def _terminate_process_iou(self):
|
||
"""
|
||
Terminate the IOU process if running
|
||
"""
|
||
|
||
if self._iou_process:
|
||
log.info('Stopping IOU process for IOU VM "{}" PID={}'.format(self.name, self._iou_process.pid))
|
||
try:
|
||
self._iou_process.terminate()
|
||
# Sometime the process can already be dead when we garbage collect
|
||
except ProcessLookupError:
|
||
pass
|
||
self._started = False
|
||
self.status = "stopped"
|
||
|
||
@asyncio.coroutine
|
||
def reload(self):
|
||
"""
|
||
Reloads the IOU process (stop & start).
|
||
"""
|
||
|
||
yield from self.stop()
|
||
yield from self.start()
|
||
|
||
def is_running(self):
|
||
"""
|
||
Checks if the IOU process is running
|
||
|
||
:returns: True or False
|
||
"""
|
||
|
||
if self._iou_process and self._iou_process.returncode is None:
|
||
return True
|
||
return False
|
||
|
||
def is_iouyap_running(self):
|
||
"""
|
||
Checks if the IOUYAP process is running
|
||
|
||
:returns: True or False
|
||
"""
|
||
|
||
if self._iouyap_process and self._iouyap_process.returncode is None:
|
||
return True
|
||
return False
|
||
|
||
def _create_netmap_config(self):
|
||
"""
|
||
Creates the NETMAP file.
|
||
"""
|
||
|
||
netmap_path = os.path.join(self.working_dir, "NETMAP")
|
||
try:
|
||
with open(netmap_path, "w", encoding="utf-8") as f:
|
||
for bay in range(0, 16):
|
||
for unit in range(0, 4):
|
||
f.write("{iouyap_id}:{bay}/{unit}{iou_id:>5d}:{bay}/{unit}\n".format(iouyap_id=str(self.application_id + 512),
|
||
bay=bay,
|
||
unit=unit,
|
||
iou_id=self.application_id))
|
||
log.info("IOU {name} [id={id}]: NETMAP file created".format(name=self._name,
|
||
id=self._id))
|
||
except OSError as e:
|
||
raise IOUError("Could not create {}: {}".format(netmap_path, e))
|
||
|
||
@asyncio.coroutine
|
||
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
|
||
"""
|
||
|
||
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))])
|
||
if not self.use_default_iou_values:
|
||
command.extend(["-n", str(self._nvram)])
|
||
command.extend(["-m", str(self._ram)])
|
||
command.extend(["-L"]) # disable local console, use remote console
|
||
|
||
# do not let IOU create the NVRAM anymore
|
||
#startup_config_file = self.startup_config_file
|
||
# if startup_config_file:
|
||
# command.extend(["-c", os.path.basename(startup_config_file)])
|
||
|
||
if self._l1_keepalives:
|
||
yield from self._enable_l1_keepalives(command)
|
||
command.extend([str(self.application_id)])
|
||
return command
|
||
|
||
def read_iou_stdout(self):
|
||
"""
|
||
Reads the standard output of the IOU process.
|
||
Only use when the process has been stopped or has crashed.
|
||
"""
|
||
|
||
output = ""
|
||
if self._iou_stdout_file:
|
||
try:
|
||
with open(self._iou_stdout_file, "rb") as file:
|
||
output = file.read().decode("utf-8", errors="replace")
|
||
except OSError as e:
|
||
log.warn("could not read {}: {}".format(self._iou_stdout_file, e))
|
||
return output
|
||
|
||
def read_iouyap_stdout(self):
|
||
"""
|
||
Reads the standard output of the iouyap process.
|
||
Only use when the process has been stopped or has crashed.
|
||
"""
|
||
|
||
output = ""
|
||
if self._iouyap_stdout_file:
|
||
try:
|
||
with open(self._iouyap_stdout_file, "rb") as file:
|
||
output = file.read().decode("utf-8", errors="replace")
|
||
except OSError as e:
|
||
log.warn("could not read {}: {}".format(self._iouyap_stdout_file, e))
|
||
return output
|
||
|
||
def _start_ioucon(self):
|
||
"""
|
||
Starts ioucon thread (for console connections).
|
||
"""
|
||
|
||
if not self._ioucon_thread:
|
||
telnet_server = "{}:{}".format(self._manager.port_manager.console_host, self.console)
|
||
log.info("Starting ioucon for IOU instance {} to accept Telnet connections on {}".format(self._name, telnet_server))
|
||
args = argparse.Namespace(appl_id=str(self.application_id), debug=False, escape='^^', telnet_limit=0, telnet_server=telnet_server)
|
||
self._ioucon_thread_stop_event = threading.Event()
|
||
self._ioucon_thread = threading.Thread(target=start_ioucon, args=(args, self._ioucon_thread_stop_event))
|
||
self._ioucon_thread.start()
|
||
|
||
@property
|
||
def ethernet_adapters(self):
|
||
"""
|
||
Returns the number of Ethernet adapters for this IOU VM.
|
||
|
||
: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 VM.
|
||
|
||
:param ethernet_adapters: number of adapters
|
||
"""
|
||
|
||
self._ethernet_adapters.clear()
|
||
for _ in range(0, ethernet_adapters):
|
||
self._ethernet_adapters.append(EthernetAdapter(interfaces=4))
|
||
|
||
log.info('IOU "{name}" [{id}]: number of Ethernet adapters changed to {adapters}'.format(name=self._name,
|
||
id=self._id,
|
||
adapters=len(self._ethernet_adapters)))
|
||
|
||
self._adapters = self._ethernet_adapters + self._serial_adapters
|
||
|
||
@property
|
||
def serial_adapters(self):
|
||
"""
|
||
Returns the number of Serial adapters for this IOU VM.
|
||
|
||
: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 VM.
|
||
|
||
:param serial_adapters: number of adapters
|
||
"""
|
||
|
||
self._serial_adapters.clear()
|
||
for _ in range(0, serial_adapters):
|
||
self._serial_adapters.append(SerialAdapter(interfaces=4))
|
||
|
||
log.info('IOU "{name}" [{id}]: number of Serial adapters changed to {adapters}'.format(name=self._name,
|
||
id=self._id,
|
||
adapters=len(self._serial_adapters)))
|
||
|
||
self._adapters = self._ethernet_adapters + self._serial_adapters
|
||
|
||
@asyncio.coroutine
|
||
def adapter_add_nio_binding(self, adapter_number, port_number, nio):
|
||
"""
|
||
Adds a adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
:param port_number: port number
|
||
:param nio: NIO instance to add to the adapter/port
|
||
"""
|
||
|
||
try:
|
||
adapter = self._adapters[adapter_number]
|
||
except IndexError:
|
||
raise IOUError('Adapter {adapter_number} does not exist for IOU "{name}"'.format(name=self._name,
|
||
adapter_number=adapter_number))
|
||
|
||
if not adapter.port_exists(port_number):
|
||
raise IOUError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
adapter.add_nio(port_number, nio)
|
||
log.info('IOU "{name}" [{id}]: {nio} added to {adapter_number}/{port_number}'.format(name=self._name,
|
||
id=self._id,
|
||
nio=nio,
|
||
adapter_number=adapter_number,
|
||
port_number=port_number))
|
||
if self.is_iouyap_running():
|
||
self._update_iouyap_config()
|
||
try:
|
||
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
||
except ProcessLookupError:
|
||
log.error("Could not update iouyap configuration: process (PID={}) not found".format(self._iouyap_process.pid))
|
||
|
||
@asyncio.coroutine
|
||
def adapter_remove_nio_binding(self, adapter_number, port_number):
|
||
"""
|
||
Removes an adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
:param port_number: port number
|
||
:returns: NIO instance
|
||
"""
|
||
|
||
try:
|
||
adapter = self._adapters[adapter_number]
|
||
except IndexError:
|
||
raise IOUError('Adapter {adapter_number} does not exist on IOU "{name}"'.format(name=self._name,
|
||
adapter_number=adapter_number))
|
||
|
||
if not adapter.port_exists(port_number):
|
||
raise IOUError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
nio = adapter.get_nio(port_number)
|
||
if isinstance(nio, NIOUDP):
|
||
self.manager.port_manager.release_udp_port(nio.lport, self._project)
|
||
adapter.remove_nio(port_number)
|
||
log.info('IOU "{name}" [{id}]: {nio} removed from {adapter_number}/{port_number}'.format(name=self._name,
|
||
id=self._id,
|
||
nio=nio,
|
||
adapter_number=adapter_number,
|
||
port_number=port_number))
|
||
if self.is_iouyap_running():
|
||
self._update_iouyap_config()
|
||
try:
|
||
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
||
except ProcessLookupError:
|
||
log.error("Could not update iouyap configuration: process (PID={}) not found".format(self._iouyap_process.pid))
|
||
return nio
|
||
|
||
@property
|
||
def l1_keepalives(self):
|
||
"""
|
||
Returns either layer 1 keepalive messages option is enabled or disabled.
|
||
|
||
:returns: boolean
|
||
"""
|
||
|
||
return self._l1_keepalives
|
||
|
||
@l1_keepalives.setter
|
||
def l1_keepalives(self, state):
|
||
"""
|
||
Enables or disables layer 1 keepalive messages.
|
||
|
||
:param state: boolean
|
||
"""
|
||
|
||
self._l1_keepalives = state
|
||
if state:
|
||
log.info('IOU "{name}" [{id}]: has activated layer 1 keepalive messages'.format(name=self._name, id=self._id))
|
||
else:
|
||
log.info('IOU "{name}" [{id}]: has deactivated layer 1 keepalive messages'.format(name=self._name, id=self._id))
|
||
|
||
@asyncio.coroutine
|
||
def _enable_l1_keepalives(self, command):
|
||
"""
|
||
Enables L1 keepalive messages if supported.
|
||
|
||
:param command: command line
|
||
"""
|
||
|
||
env = os.environ.copy()
|
||
if "IOURC" not in os.environ:
|
||
env["IOURC"] = self.iourc_path
|
||
try:
|
||
output = yield from gns3server.utils.asyncio.subprocess_check_output(self._path, "-h", cwd=self.working_dir, env=env)
|
||
if re.search("-l\s+Enable Layer 1 keepalive messages", output):
|
||
command.extend(["-l"])
|
||
else:
|
||
raise IOUError("layer 1 keepalive messages are not supported by {}".format(os.path.basename(self._path)))
|
||
except (OSError, subprocess.SubprocessError) as e:
|
||
log.warn("could not determine if layer 1 keepalive messages are supported by {}: {}".format(os.path.basename(self._path), e))
|
||
|
||
@property
|
||
def startup_config_content(self):
|
||
"""
|
||
Returns the content of the current startup-config file.
|
||
"""
|
||
|
||
config_file = self.startup_config_file
|
||
if config_file is None:
|
||
return None
|
||
|
||
try:
|
||
with open(config_file, "rb") as f:
|
||
return f.read().decode("utf-8", errors="replace")
|
||
except OSError as e:
|
||
raise IOUError("Can't read startup-config file '{}': {}".format(config_file, e))
|
||
|
||
@startup_config_content.setter
|
||
def startup_config_content(self, startup_config):
|
||
"""
|
||
Update the startup config
|
||
|
||
:param startup_config: content of the startup configuration file
|
||
"""
|
||
|
||
try:
|
||
startup_config_path = os.path.join(self.working_dir, "startup-config.cfg")
|
||
|
||
if startup_config is None:
|
||
startup_config = ''
|
||
|
||
# We disallow erasing the startup config file
|
||
if len(startup_config) == 0 and os.path.exists(startup_config_path):
|
||
return
|
||
|
||
with open(startup_config_path, 'w+', encoding='utf-8') as f:
|
||
if len(startup_config) == 0:
|
||
f.write('')
|
||
else:
|
||
startup_config = startup_config.replace("%h", self._name)
|
||
f.write(startup_config)
|
||
except OSError as e:
|
||
raise IOUError("Can't write startup-config file '{}': {}".format(startup_config_path, e))
|
||
|
||
@property
|
||
def private_config_content(self):
|
||
"""
|
||
Returns the content of the current private-config file.
|
||
"""
|
||
|
||
config_file = self.private_config_file
|
||
if config_file is None:
|
||
return None
|
||
|
||
try:
|
||
with open(config_file, "rb") as f:
|
||
return f.read().decode("utf-8", errors="replace")
|
||
except OSError as e:
|
||
raise IOUError("Can't read private-config file '{}': {}".format(config_file, e))
|
||
|
||
@private_config_content.setter
|
||
def private_config_content(self, private_config):
|
||
"""
|
||
Update the private config
|
||
|
||
:param private_config: content of the private configuration file
|
||
"""
|
||
|
||
try:
|
||
private_config_path = os.path.join(self.working_dir, "private-config.cfg")
|
||
|
||
if private_config is None:
|
||
private_config = ''
|
||
|
||
# We disallow erasing the startup config file
|
||
if len(private_config) == 0 and os.path.exists(private_config_path):
|
||
return
|
||
|
||
with open(private_config_path, 'w+', encoding='utf-8') as f:
|
||
if len(private_config) == 0:
|
||
f.write('')
|
||
else:
|
||
private_config = private_config.replace("%h", self._name)
|
||
f.write(private_config)
|
||
except OSError as e:
|
||
raise IOUError("Can't write private-config file '{}': {}".format(private_config_path, e))
|
||
|
||
@property
|
||
def startup_config_file(self):
|
||
"""
|
||
Returns the startup-config file for this IOU VM.
|
||
|
||
:returns: path to config file. None if the file doesn't exist
|
||
"""
|
||
|
||
path = os.path.join(self.working_dir, 'startup-config.cfg')
|
||
if os.path.exists(path):
|
||
return path
|
||
else:
|
||
return None
|
||
|
||
@property
|
||
def private_config_file(self):
|
||
"""
|
||
Returns the private-config file for this IOU VM.
|
||
|
||
:returns: path to config file. None if the file doesn't exist
|
||
"""
|
||
|
||
path = os.path.join(self.working_dir, 'private-config.cfg')
|
||
if os.path.exists(path):
|
||
return path
|
||
else:
|
||
return None
|
||
|
||
@property
|
||
def relative_startup_config_file(self):
|
||
"""
|
||
Returns the startup-config file relative to the project directory.
|
||
It's compatible with pre 1.3 projects.
|
||
|
||
:returns: path to startup-config file. None if the file doesn't exist
|
||
"""
|
||
|
||
path = os.path.join(self.working_dir, 'startup-config.cfg')
|
||
if os.path.exists(path):
|
||
return 'startup-config.cfg'
|
||
else:
|
||
return None
|
||
|
||
@property
|
||
def relative_private_config_file(self):
|
||
"""
|
||
Returns the private-config file relative to the project directory.
|
||
|
||
:returns: path to private-config file. None if the file doesn't exist
|
||
"""
|
||
|
||
path = os.path.join(self.working_dir, 'private-config.cfg')
|
||
if os.path.exists(path):
|
||
return 'private-config.cfg'
|
||
else:
|
||
return None
|
||
|
||
def extract_configs(self):
|
||
"""
|
||
Gets the contents of the config files
|
||
startup-config and private-config from NVRAM.
|
||
|
||
:returns: tuple (startup-config, private-config)
|
||
"""
|
||
|
||
nvram_file = os.path.join(self.working_dir, "nvram_{:05d}".format(self.application_id))
|
||
if not os.path.exists(nvram_file):
|
||
return None, None
|
||
try:
|
||
with open(nvram_file, "rb") as file:
|
||
nvram_content = file.read()
|
||
except OSError as e:
|
||
log.warning("Cannot read nvram file {}: {}".format(nvram_file, e))
|
||
return None, None
|
||
|
||
try:
|
||
startup_config_content, private_config_content = nvram_export(nvram_content)
|
||
except ValueError as e:
|
||
log.warning("Could not export configs from nvram file {}: {}".format(nvram_file, e))
|
||
return None, None
|
||
|
||
return startup_config_content, private_config_content
|
||
|
||
def save_configs(self):
|
||
"""
|
||
Saves the startup-config and private-config to files.
|
||
"""
|
||
|
||
if self.startup_config_content or self.private_config_content:
|
||
startup_config_content, private_config_content = self.extract_configs()
|
||
if startup_config_content:
|
||
config_path = os.path.join(self.working_dir, "startup-config.cfg")
|
||
try:
|
||
config = startup_config_content.decode("utf-8", errors="replace")
|
||
config = "!\n" + config.replace("\r", "")
|
||
with open(config_path, "wb") as f:
|
||
log.info("saving startup-config to {}".format(config_path))
|
||
f.write(config.encode("utf-8"))
|
||
except (binascii.Error, OSError) as e:
|
||
raise IOUError("Could not save the startup configuration {}: {}".format(config_path, e))
|
||
|
||
if private_config_content:
|
||
config_path = os.path.join(self.working_dir, "private-config.cfg")
|
||
try:
|
||
config = private_config_content.decode("utf-8", errors="replace")
|
||
config = "!\n" + config.replace("\r", "")
|
||
with open(config_path, "wb") as f:
|
||
log.info("saving private-config to {}".format(config_path))
|
||
f.write(config.encode("utf-8"))
|
||
except (binascii.Error, OSError) as e:
|
||
raise IOUError("Could not save the private configuration {}: {}".format(config_path, e))
|
||
|
||
@asyncio.coroutine
|
||
def start_capture(self, adapter_number, port_number, output_file, data_link_type="DLT_EN10MB"):
|
||
"""
|
||
Starts a packet capture.
|
||
|
||
:param adapter_number: adapter number
|
||
:param port_number: port number
|
||
:param output_file: PCAP destination file for the capture
|
||
:param data_link_type: PCAP data link type (DLT_*), default is DLT_EN10MB
|
||
"""
|
||
|
||
try:
|
||
adapter = self._adapters[adapter_number]
|
||
except IndexError:
|
||
raise IOUError('Adapter {adapter_number} does not exist on IOU "{name}"'.format(name=self._name,
|
||
adapter_number=adapter_number))
|
||
|
||
if not adapter.port_exists(port_number):
|
||
raise IOUError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
nio = adapter.get_nio(port_number)
|
||
if not nio:
|
||
raise IOUError("NIO {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
if nio.capturing:
|
||
raise IOUError("Packet capture is already activated on {adapter_number}/{port_number}".format(adapter_number=adapter_number,
|
||
port_number=port_number))
|
||
|
||
nio.startPacketCapture(output_file, data_link_type)
|
||
log.info('IOU "{name}" [{id}]: starting packet capture on {adapter_number}/{port_number} to {output_file}'.format(name=self._name,
|
||
id=self._id,
|
||
adapter_number=adapter_number,
|
||
port_number=port_number,
|
||
output_file=output_file))
|
||
|
||
if self.is_iouyap_running():
|
||
self._update_iouyap_config()
|
||
try:
|
||
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
||
except ProcessLookupError:
|
||
log.error("Could not update iouyap configuration: process (PID={}) not found".format(self._iouyap_process.pid))
|
||
|
||
@asyncio.coroutine
|
||
def stop_capture(self, adapter_number, port_number):
|
||
"""
|
||
Stops a packet capture.
|
||
|
||
:param adapter_number: adapter number
|
||
:param port_number: port number
|
||
"""
|
||
|
||
try:
|
||
adapter = self._adapters[adapter_number]
|
||
except IndexError:
|
||
raise IOUError('Adapter {adapter_number} does not exist on IOU "{name}"'.format(name=self._name,
|
||
adapter_number=adapter_number))
|
||
|
||
if not adapter.port_exists(port_number):
|
||
raise IOUError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
nio = adapter.get_nio(port_number)
|
||
if not nio:
|
||
raise IOUError("NIO {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
|
||
port_number=port_number))
|
||
|
||
nio.stopPacketCapture()
|
||
log.info('IOU "{name}" [{id}]: stopping packet capture on {adapter_number}/{port_number}'.format(name=self._name,
|
||
id=self._id,
|
||
adapter_number=adapter_number,
|
||
port_number=port_number))
|
||
if self.is_iouyap_running():
|
||
self._update_iouyap_config()
|
||
try:
|
||
os.kill(self._iouyap_process.pid, signal.SIGHUP)
|
||
except ProcessLookupError:
|
||
log.error("Could not update iouyap configuration: process (PID={}) not found".format(self._iouyap_process.pid))
|