mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-11-18 01:34:50 +02:00
1428 lines
50 KiB
Python
1428 lines
50 KiB
Python
#
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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 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 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 ..base_node import BaseNode
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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 gns3server.compute.ubridge.ubridge_error import UbridgeError
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from gns3server.utils.file_watcher import FileWatcher
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from gns3server.utils.asyncio.telnet_server import AsyncioTelnetServer
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from gns3server.utils.asyncio import locking
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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(BaseNode):
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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 node_id: Node 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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:param console_type: console type
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"""
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def __init__(
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self, name, node_id, project, manager, application_id=None, path=None, console=None, console_type="telnet"
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):
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super().__init__(name, node_id, project, manager, console=console, console_type=console_type)
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log.info(
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'IOU "{name}" [{id}]: assigned with application ID {application_id}'.format(
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name=self._name, id=self._id, application_id=application_id
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)
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)
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self._iou_process = None
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self._telnet_server = None
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self._iou_stdout_file = ""
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self._started = False
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self._nvram_watcher = None
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self._path = self.manager.get_abs_image_path(path, project.path)
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self._license_check = True
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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._application_id = application_id
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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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def _nvram_changed(self, path):
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"""
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Called when the NVRAM file has changed
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"""
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log.debug(f"NVRAM changed: {path}")
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self.save_configs()
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self.updated()
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async 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 (await 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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await self.stop()
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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, self.project.path)
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log.info(f'IOU "{self._name}" [{self._id}]: IOU image updated to "{self._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(f'IOU "{self._name}" [{self._id}]: uses the default IOU image values')
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else:
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log.info(f'IOU "{self._name}" [{self._id}]: does not use the default IOU image values')
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async def update_default_iou_values(self):
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"""
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Finds the default RAM and NVRAM values for the IOU image.
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"""
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try:
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output = await gns3server.utils.asyncio.subprocess_check_output(
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self._path, "-h", cwd=self.working_dir, stderr=True
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)
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match = re.search(r"-n <n>\s+Size of nvram in Kb \(default ([0-9]+)KB\)", output)
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if match:
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self.nvram = int(match.group(1))
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match = re.search(r"-m <n>\s+Megabytes of router memory \(default ([0-9]+)MB\)", output)
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if match:
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self.ram = int(match.group(1))
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except (ValueError, OSError, subprocess.SubprocessError) as e:
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log.warning(f"could not find default RAM and NVRAM values for {os.path.basename(self._path)}: {e}")
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async def create(self):
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await self.update_default_iou_values()
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def _check_requirements(self):
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"""
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Checks the IOU image.
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"""
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if not self._path:
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raise IOUError("IOU image is not configured")
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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(f"IOU image '{self._path}' linked to '{os.path.realpath(self._path)}' is not accessible")
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else:
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raise IOUError(f"IOU image '{self._path}' is not accessible")
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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(f"Cannot read ELF header for IOU image '{self._path}': {e}")
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# IOU images must start with the ELF magic number, be 32-bit or 64-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" and elf_header_start != b"\x7fELF\x02\x01\x01":
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raise IOUError(f"'{self._path}' is not a valid IOU image")
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if not os.access(self._path, os.X_OK):
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raise IOUError(f"IOU image '{self._path}' is not executable")
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def asdict(self):
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iou_vm_info = {
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"name": self.name,
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"usage": self.usage,
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"node_id": self.id,
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"node_directory": self.working_path,
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"console": self._console,
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"console_type": self._console_type,
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"status": self.status,
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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, self.working_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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"use_default_iou_values": self._use_default_iou_values,
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"command_line": self.command_line,
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"application_id": self.application_id,
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}
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iou_vm_info["path"] = self.manager.get_relative_image_path(self.path, self.project.path)
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return iou_vm_info
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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.settings.IOU.iourc_path
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if not iourc_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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# 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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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(
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'IOU "{name}" [{id}]: RAM updated from {old_ram}MB to {new_ram}MB'.format(
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name=self._name, id=self._id, old_ram=self._ram, new_ram=ram
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)
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)
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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(
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'IOU "{name}" [{id}]: NVRAM updated from {old_nvram}KB to {new_nvram}KB'.format(
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name=self._name, id=self._id, old_nvram=self._nvram, new_nvram=nvram
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)
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)
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self._nvram = nvram
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@BaseNode.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 = re.sub(r"hostname .+$", "hostname " + new_name, content, flags=re.MULTILINE)
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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 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:
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# If we don't save the value in the ~/ the licence is lost at project
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# reload
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path = os.path.join(os.path.expanduser("~/"), ".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(f"Could not write the iourc file {path}: {e}")
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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(f"Could not write the iourc file {path}: {e}")
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@property
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def license_check(self):
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return self._license_check
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@license_check.setter
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def license_check(self, value):
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self._license_check = value
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async 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 = await gns3server.utils.asyncio.subprocess_check_output("ldd", self._path)
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except (OSError, subprocess.SubprocessError) as e:
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log.warning(f"Could not determine the shared library dependencies for {self._path}: {e}")
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return
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p = re.compile(r"([\.\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(
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"The following shared library dependencies cannot be found for IOU image {}: {}".format(
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self._path, ", ".join(missing_libs)
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)
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)
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async 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 is sent by the controller
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if self.license_check is False:
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return
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try:
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# we allow license check to be disabled server wide
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server_wide_license_check = self._manager.config.settings.IOU.license_check
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except ValueError:
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raise IOUError("Invalid licence check setting")
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if server_wide_license_check is False:
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log.warning("License check is explicitly disabled on this server")
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return
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config = configparser.ConfigParser()
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try:
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log.info(f"Checking IOU license in '{self.iourc_path}'")
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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(f"Could not open iourc file {self.iourc_path}: {e}")
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except configparser.Error as e:
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raise IOUError(f"Could not parse iourc file {self.iourc_path}: {e}")
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except UnicodeDecodeError as e:
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raise IOUError(f"Non ascii characters in iourc file {self.iourc_path}, please remove them: {e}")
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if "license" not in config:
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raise IOUError(f"License section not found in iourc file {self.iourc_path}")
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hostname = socket.gethostname()
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if len(hostname) > 15:
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log.warning(f"Older IOU images may not boot because hostname '{hostname}' length is above 15 characters")
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if hostname not in config["license"]:
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raise IOUError(f'Hostname "{hostname}" not found in iourc file {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(f"IOU key not ending with ; in iourc file {self.iourc_path}")
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if len(user_ioukey) != 17:
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raise IOUError(f"IOU key length is not 16 characters in iourc file {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 = (await gns3server.utils.asyncio.subprocess_check_output("hostid")).strip()
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except FileNotFoundError as e:
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raise IOUError(f"Could not find hostid: {e}")
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except (OSError, subprocess.SubprocessError) as e:
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raise IOUError(f"Could not execute hostid: {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(f"Invalid hostid detected: {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(
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"Invalid IOU license key {} detected in iourc file {} for host {}".format(
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user_ioukey, self.iourc_path, hostname
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)
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)
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def _nvram_file(self):
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"""
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Path to the nvram file
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"""
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return os.path.join(self.working_dir, f"nvram_{self.application_id:05d}")
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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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"""
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startup_config_content = self.startup_config_content
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if startup_config_content:
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nvram_file = self._nvram_file()
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try:
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if not os.path.exists(nvram_file):
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open(nvram_file, "a").close()
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nvram_content = None
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else:
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with open(nvram_file, "rb") as file:
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nvram_content = file.read()
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except OSError as e:
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raise IOUError(f"Cannot read nvram file {nvram_file}: {e}")
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startup_config_content = startup_config_content.encode("utf-8")
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private_config_content = self.private_config_content
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if private_config_content is not None:
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private_config_content = private_config_content.encode("utf-8")
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try:
|
|
nvram_content = nvram_import(nvram_content, startup_config_content, private_config_content, self.nvram)
|
|
except ValueError as e:
|
|
raise IOUError(f"Cannot push configs to nvram {nvram_file}: {e}")
|
|
try:
|
|
with open(nvram_file, "wb") as file:
|
|
file.write(nvram_content)
|
|
except OSError as e:
|
|
raise IOUError(f"Cannot write nvram file {nvram_file}: {e}")
|
|
|
|
async def start(self):
|
|
"""
|
|
Starts the IOU process.
|
|
"""
|
|
|
|
self._check_requirements()
|
|
if not self.is_running():
|
|
|
|
await self._library_check()
|
|
|
|
try:
|
|
self._rename_nvram_file()
|
|
except OSError as e:
|
|
raise IOUError(f"Could not rename nvram files: {e}")
|
|
|
|
iourc_path = self.iourc_path
|
|
if not iourc_path:
|
|
raise IOUError("Could not find an iourc file (IOU license), please configure an IOU license")
|
|
if not os.path.isfile(iourc_path):
|
|
raise IOUError(f"The iourc path '{iourc_path}' is not a regular file")
|
|
|
|
await self._check_iou_licence()
|
|
await self._start_ubridge()
|
|
|
|
self._create_netmap_config()
|
|
if self.use_default_iou_values:
|
|
# make sure we have the default nvram amount to correctly push the configs
|
|
await self.update_default_iou_values()
|
|
self._push_configs_to_nvram()
|
|
|
|
# check if there is enough RAM to run
|
|
self.check_available_ram(self.ram)
|
|
|
|
self._nvram_watcher = FileWatcher(self._nvram_file(), self._nvram_changed, delay=2)
|
|
|
|
# created a environment variable pointing to the iourc file.
|
|
env = os.environ.copy()
|
|
if "IOURC" not in os.environ and iourc_path:
|
|
env["IOURC"] = iourc_path
|
|
|
|
# create a symbolic link to the image to avoid IOU error "failed code signing checks"
|
|
# on newer images, see https://github.com/GNS3/gns3-server/issues/1484
|
|
try:
|
|
symlink = os.path.join(self.working_dir, os.path.basename(self.path))
|
|
if os.path.islink(symlink):
|
|
os.unlink(symlink)
|
|
os.symlink(self.path, symlink)
|
|
except OSError as e:
|
|
raise IOUError(f"Could not create symbolic link: {e}")
|
|
|
|
command = await self._build_command()
|
|
try:
|
|
log.info(f"Starting IOU: {command}")
|
|
self.command_line = " ".join(command)
|
|
self._iou_process = await asyncio.create_subprocess_exec(
|
|
*command,
|
|
stdout=asyncio.subprocess.PIPE,
|
|
stdin=asyncio.subprocess.PIPE,
|
|
stderr=subprocess.STDOUT,
|
|
cwd=self.working_dir,
|
|
env=env,
|
|
)
|
|
log.info(f"IOU instance {self._id} started PID={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(f"Could not start IOU: {e}: 32-bit binary support is probably not installed")
|
|
except (OSError, subprocess.SubprocessError) as e:
|
|
iou_stdout = self.read_iou_stdout()
|
|
log.error(f"Could not start IOU {self._path}: {e}\n{iou_stdout}")
|
|
raise IOUError(f"Could not start IOU {self._path}: {e}\n{iou_stdout}")
|
|
|
|
await self.start_console()
|
|
|
|
# configure networking support
|
|
await self._networking()
|
|
|
|
async def start_console(self):
|
|
"""
|
|
Start the Telnet server to provide console access.
|
|
"""
|
|
|
|
if self.console and self.console_type == "telnet":
|
|
server = AsyncioTelnetServer(
|
|
reader=self._iou_process.stdout, writer=self._iou_process.stdin, binary=True, echo=True
|
|
)
|
|
try:
|
|
self._telnet_server = await asyncio.start_server(
|
|
server.run, self._manager.port_manager.console_host, self.console
|
|
)
|
|
except OSError as e:
|
|
await self.stop()
|
|
raise IOUError(
|
|
"Could not start Telnet server on socket {}:{}: {}".format(
|
|
self._manager.port_manager.console_host, self.console, e
|
|
)
|
|
)
|
|
|
|
async def reset_console(self):
|
|
"""
|
|
Reset the console.
|
|
"""
|
|
|
|
if self._telnet_server:
|
|
self._telnet_server.close()
|
|
await self._telnet_server.wait_closed()
|
|
self._telnet_server = None
|
|
await self.start_console()
|
|
|
|
@locking
|
|
async def _networking(self):
|
|
"""
|
|
Configures the IOL bridge in uBridge.
|
|
"""
|
|
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
try:
|
|
# delete any previous bridge if it exists
|
|
await self._ubridge_send(f"iol_bridge delete {bridge_name}")
|
|
except UbridgeError:
|
|
pass
|
|
await self._ubridge_send(f"iol_bridge create {bridge_name} {self.application_id + 512}")
|
|
|
|
bay_id = 0
|
|
for adapter in self._adapters:
|
|
unit_id = 0
|
|
for unit in adapter.ports.keys():
|
|
nio = adapter.get_nio(unit)
|
|
if nio and isinstance(nio, NIOUDP):
|
|
await self._ubridge_send(
|
|
"iol_bridge add_nio_udp {name} {iol_id} {bay} {unit} {lport} {rhost} {rport}".format(
|
|
name=bridge_name,
|
|
iol_id=self.application_id,
|
|
bay=bay_id,
|
|
unit=unit_id,
|
|
lport=nio.lport,
|
|
rhost=nio.rhost,
|
|
rport=nio.rport,
|
|
)
|
|
)
|
|
if nio.capturing:
|
|
await self._ubridge_send(
|
|
'iol_bridge start_capture {name} "{output_file}" {data_link_type}'.format(
|
|
name=bridge_name,
|
|
output_file=nio.pcap_output_file,
|
|
data_link_type=re.sub(r"^DLT_", "", nio.pcap_data_link_type),
|
|
)
|
|
)
|
|
|
|
await self._ubridge_apply_filters(bay_id, unit_id, nio.filters)
|
|
unit_id += 1
|
|
bay_id += 1
|
|
|
|
await self._ubridge_send(f"iol_bridge start {bridge_name}")
|
|
|
|
def _termination_callback(self, process_name, returncode):
|
|
"""
|
|
Called when the process has stopped.
|
|
|
|
:param returncode: Process returncode
|
|
"""
|
|
|
|
self._terminate_process_iou()
|
|
if returncode != 0:
|
|
if returncode == -11:
|
|
message = 'IOU VM "{}" process has stopped with return code: {} (segfault). This could be an issue with the IOU image, using a different image may fix this.\n{}'.format(
|
|
self.name, returncode, self.read_iou_stdout()
|
|
)
|
|
else:
|
|
message = (
|
|
f'IOU VM "{self.name}" process has stopped with return code: {returncode}\n{self.read_iou_stdout()}'
|
|
)
|
|
log.warning(message)
|
|
self.project.emit("log.error", {"message": message})
|
|
if self._telnet_server:
|
|
self._telnet_server.close()
|
|
self._telnet_server = None
|
|
|
|
def _rename_nvram_file(self):
|
|
"""
|
|
Before starting the VM, rename the nvram and vlan.dat files with the correct IOU application identifier.
|
|
"""
|
|
|
|
destination = self._nvram_file()
|
|
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, f"vlan.dat-{self.application_id:05d}")
|
|
for file_path in glob.glob(os.path.join(glob.escape(self.working_dir), "vlan.dat-*")):
|
|
shutil.move(file_path, destination)
|
|
|
|
async def stop(self):
|
|
"""
|
|
Stops the IOU process.
|
|
"""
|
|
|
|
await self._stop_ubridge()
|
|
if self._nvram_watcher:
|
|
self._nvram_watcher.close()
|
|
self._nvram_watcher = None
|
|
|
|
if self._telnet_server:
|
|
self._telnet_server.close()
|
|
self._telnet_server = None
|
|
|
|
if self.is_running():
|
|
self._terminate_process_iou()
|
|
if self._iou_process.returncode is None:
|
|
try:
|
|
await gns3server.utils.asyncio.wait_for_process_termination(self._iou_process, timeout=3)
|
|
except asyncio.TimeoutError:
|
|
if self._iou_process.returncode is None:
|
|
log.warning(f"IOU process {self._iou_process.pid} is still running... killing it")
|
|
try:
|
|
self._iou_process.kill()
|
|
except ProcessLookupError:
|
|
pass
|
|
self._iou_process = None
|
|
|
|
try:
|
|
symlink = os.path.join(self.working_dir, os.path.basename(self.path))
|
|
if os.path.islink(symlink):
|
|
os.unlink(symlink)
|
|
except OSError as e:
|
|
log.warning(f"Could not delete symbolic link: {e}")
|
|
|
|
self._started = False
|
|
self.save_configs()
|
|
|
|
def _terminate_process_iou(self):
|
|
"""
|
|
Terminate the IOU process if running
|
|
"""
|
|
|
|
if self._iou_process:
|
|
log.info(f'Stopping IOU process for IOU VM "{self.name}" PID={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"
|
|
|
|
async def reload(self):
|
|
"""
|
|
Reloads the IOU process (stop & start).
|
|
"""
|
|
|
|
await self.stop()
|
|
await 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
|
|
|
|
@BaseNode.console_type.setter
|
|
def console_type(self, new_console_type):
|
|
"""
|
|
Sets the console type for this IOU VM.
|
|
|
|
:param new_console_type: console type (string)
|
|
"""
|
|
|
|
if self.is_running() and self.console_type != new_console_type:
|
|
raise IOUError(f'"{self._name}" must be stopped to change the console type to {new_console_type}')
|
|
|
|
super(IOUVM, IOUVM).console_type.__set__(self, new_console_type)
|
|
|
|
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(
|
|
"{ubridge_id}:{bay}/{unit}{iou_id:>5d}:{bay}/{unit}\n".format(
|
|
ubridge_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(f"Could not create {netmap_path}: {e}")
|
|
|
|
async 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)])
|
|
|
|
# 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:
|
|
await 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.warning(f"could not read {self._iou_stdout_file}: {e}")
|
|
return output
|
|
|
|
@property
|
|
def adapters(self):
|
|
return self._adapters
|
|
|
|
@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
|
|
|
|
async def adapter_add_nio_binding(self, adapter_number, port_number, nio):
|
|
"""
|
|
Adds an 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 on 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.ubridge:
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
await self._ubridge_send(
|
|
"iol_bridge add_nio_udp {name} {iol_id} {bay} {unit} {lport} {rhost} {rport}".format(
|
|
name=bridge_name,
|
|
iol_id=self.application_id,
|
|
bay=adapter_number,
|
|
unit=port_number,
|
|
lport=nio.lport,
|
|
rhost=nio.rhost,
|
|
rport=nio.rport,
|
|
)
|
|
)
|
|
await self._ubridge_apply_filters(adapter_number, port_number, nio.filters)
|
|
|
|
async def adapter_update_nio_binding(self, adapter_number, port_number, nio):
|
|
"""
|
|
Updates an adapter NIO binding.
|
|
|
|
:param adapter_number: adapter number
|
|
:param port_number: port number
|
|
:param nio: NIO instance to add to the adapter
|
|
"""
|
|
|
|
if self.ubridge:
|
|
await self._ubridge_apply_filters(adapter_number, port_number, nio.filters)
|
|
|
|
async def _ubridge_apply_filters(self, adapter_number, port_number, filters):
|
|
"""
|
|
Apply filter like rate limiting
|
|
|
|
:param adapter_number: adapter number
|
|
:param port_number: port number
|
|
:param filters: Array of filter dictionnary
|
|
"""
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
location = "{bridge_name} {bay} {unit}".format(bridge_name=bridge_name, bay=adapter_number, unit=port_number)
|
|
await self._ubridge_send("iol_bridge reset_packet_filters " + location)
|
|
for filter in self._build_filter_list(filters):
|
|
cmd = "iol_bridge add_packet_filter {} {}".format(location, filter)
|
|
await self._ubridge_send(cmd)
|
|
|
|
async 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 on 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.ubridge:
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
await self._ubridge_send(
|
|
"iol_bridge delete_nio_udp {name} {bay} {unit}".format(
|
|
name=bridge_name, bay=adapter_number, unit=port_number
|
|
)
|
|
)
|
|
|
|
return nio
|
|
|
|
def get_nio(self, adapter_number, port_number):
|
|
"""
|
|
Gets 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 on 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 on adapter {adapter}".format(adapter=adapter, port_number=port_number)
|
|
)
|
|
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(f'IOU "{self._name}" [{self._id}]: has activated layer 1 keepalive messages')
|
|
else:
|
|
log.info(f'IOU "{self._name}" [{self._id}]: has deactivated layer 1 keepalive messages')
|
|
|
|
async 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 = await gns3server.utils.asyncio.subprocess_check_output(
|
|
self._path, "-h", cwd=self.working_dir, env=env, stderr=True
|
|
)
|
|
if re.search(r"-l\s+Enable Layer 1 keepalive messages", output):
|
|
command.extend(["-l"])
|
|
else:
|
|
raise IOUError(f"layer 1 keepalive messages are not supported by {os.path.basename(self._path)}")
|
|
except (OSError, subprocess.SubprocessError) as e:
|
|
log.warning(
|
|
f"could not determine if layer 1 keepalive messages are supported by {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(f"Can't read startup-config file '{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)
|
|
|
|
vlan_file = os.path.join(self.working_dir, f"vlan.dat-{self.application_id:05d}")
|
|
if os.path.exists(vlan_file):
|
|
try:
|
|
os.remove(vlan_file)
|
|
except OSError as e:
|
|
log.error(f"Could not delete VLAN file '{vlan_file}': {e}")
|
|
|
|
except OSError as e:
|
|
raise IOUError(f"Can't write startup-config file '{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(f"Can't read private-config file '{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 private 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(f"Can't write private-config file '{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
|
|
|
|
@property
|
|
def application_id(self):
|
|
"""
|
|
Returns application_id which unique identifier for IOU running script. Value is between 1 and 512.
|
|
When it's not set returns value from the local manager.
|
|
|
|
:returns: integer between 1 and 512
|
|
"""
|
|
|
|
return self._application_id
|
|
|
|
@application_id.setter
|
|
def application_id(self, application_id):
|
|
"""
|
|
Sets application_id for IOU.
|
|
|
|
:param: integer between 1 and 512
|
|
"""
|
|
self._application_id = application_id
|
|
|
|
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, f"nvram_{self.application_id:05d}")
|
|
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(f"Cannot read nvram file {nvram_file}: {e}")
|
|
return None, None
|
|
|
|
try:
|
|
startup_config_content, private_config_content = nvram_export(nvram_content)
|
|
except ValueError as e:
|
|
log.warning(f"Could not export configs from nvram file {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")
|
|
with open(config_path, "wb") as f:
|
|
log.info(f"saving startup-config to {config_path}")
|
|
f.write(config.encode("utf-8"))
|
|
except (binascii.Error, OSError) as e:
|
|
raise IOUError(f"Could not save the startup configuration {config_path}: {e}")
|
|
|
|
if private_config_content and private_config_content != b"\nend\n":
|
|
config_path = os.path.join(self.working_dir, "private-config.cfg")
|
|
try:
|
|
config = private_config_content.decode("utf-8", errors="replace")
|
|
with open(config_path, "wb") as f:
|
|
log.info(f"saving private-config to {config_path}")
|
|
f.write(config.encode("utf-8"))
|
|
except (binascii.Error, OSError) as e:
|
|
raise IOUError(f"Could not save the private configuration {config_path}: {e}")
|
|
|
|
async 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
|
|
"""
|
|
|
|
nio = self.get_nio(adapter_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.start_packet_capture(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.ubridge:
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
await self._ubridge_send(
|
|
'iol_bridge start_capture {name} {bay} {unit} "{output_file}" {data_link_type}'.format(
|
|
name=bridge_name,
|
|
bay=adapter_number,
|
|
unit=port_number,
|
|
output_file=output_file,
|
|
data_link_type=re.sub(r"^DLT_", "", data_link_type),
|
|
)
|
|
)
|
|
|
|
async def stop_capture(self, adapter_number, port_number):
|
|
"""
|
|
Stops a packet capture.
|
|
|
|
:param adapter_number: adapter number
|
|
:param port_number: port number
|
|
"""
|
|
|
|
nio = self.get_nio(adapter_number, port_number)
|
|
if not nio.capturing:
|
|
return
|
|
nio.stop_packet_capture()
|
|
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.ubridge:
|
|
bridge_name = f"IOL-BRIDGE-{self.application_id + 512}"
|
|
await self._ubridge_send(
|
|
"iol_bridge stop_capture {name} {bay} {unit}".format(
|
|
name=bridge_name, bay=adapter_number, unit=port_number
|
|
)
|
|
)
|