# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
"""
IOU VM management (creates command line, processes, files etc.) in
order to run an IOU VM.
"""
import os
import signal
import socket
import re
import asyncio
import subprocess
import shutil
import argparse
import threading
import configparser
import struct
import hashlib
import glob
from .iou_error import IOUError
from ..adapters.ethernet_adapter import EthernetAdapter
from ..adapters.serial_adapter import SerialAdapter
from ..nios.nio_udp import NIOUDP
from ..nios.nio_tap import NIOTAP
from ..nios.nio_generic_ethernet import NIOGenericEthernet
from ..base_vm import BaseVM
from ...utils.glob import glob_escape
from .ioucon import start_ioucon
import gns3server.utils.asyncio
import logging
import sys
log = logging.getLogger(__name__)
class IOUVM(BaseVM):
module_name = 'iou'
"""
IOU VM implementation.
:param name: IOU VM name
:param vm_id: IOU VM identifier
:param project: Project instance
:param manager: Manager instance
:param console: TCP console port
"""
def __init__(self, name, vm_id, project, manager, console=None):
super().__init__(name, vm_id, project, manager, console=console)
self._command = []
self._iouyap_process = None
self._iou_process = None
self._iou_stdout_file = ""
self._started = False
self._path = None
self._ioucon_thread = None
# IOU settings
self._ethernet_adapters = []
self._serial_adapters = []
self.ethernet_adapters = 2 # one adapter = 4 interfaces
self.serial_adapters = 2 # one adapter = 4 interfaces
self._use_default_iou_values = True # for RAM & NVRAM values
self._nvram = 128 # Kilobytes
self._initial_config = ""
self._ram = 256 # Megabytes
self._l1_keepalives = False # used to overcome the always-up Ethernet interfaces (not supported by all IOSes).
@asyncio.coroutine
def close(self):
"""
Closes this IOU VM.
"""
log.debug('IOU "{name}" [{id}] is closing'.format(name=self._name, id=self._id))
if self._console:
self._manager.port_manager.release_tcp_port(self._console, self._project)
self._console = None
adapters = self._ethernet_adapters + self._serial_adapters
for adapter in adapters:
if adapter is not None:
for nio in adapter.ports.values():
if nio and isinstance(nio, NIOUDP):
self.manager.port_manager.release_udp_port(nio.lport, self._project)
yield from self.stop()
@property
def path(self):
"""
Path of the IOU executable.
:returns: path to the IOU image executable
"""
return self._path
@path.setter
def path(self, path):
"""
Path of the IOU executable.
:param path: path to the IOU image executable
"""
self._path = self.manager.get_abs_image_path(path)
# In 1.2 users uploaded images to the images roots
# after the migration their images are inside images/IOU
# but old topologies use old path
if "IOU" not in self._path:
location, filename = os.path.split(self._path)
fix_path = os.path.join(location, "IOU", filename)
if os.path.isfile(fix_path):
self._path = fix_path
if not os.path.isfile(self._path) or not os.path.exists(self._path):
if os.path.islink(self._path):
raise IOUError("IOU image '{}' linked to '{}' is not accessible".format(self._path, os.path.realpath(self._path)))
else:
raise IOUError("IOU image '{}' is not accessible".format(self._path))
try:
with open(self._path, "rb") as f:
# read the first 7 bytes of the file.
elf_header_start = f.read(7)
except OSError as e:
raise IOUError("Cannot read ELF header for IOU image '{}': {}".format(self._path, e))
# IOU images must start with the ELF magic number, be 32-bit, little endian
# and have an ELF version of 1 normal IOS image are big endian!
if elf_header_start != b'\x7fELF\x01\x01\x01':
raise IOUError("'{}' is not a valid IOU image".format(self._path))
if not os.access(self._path, os.X_OK):
raise IOUError("IOU image '{}' is not executable".format(self._path))
@property
def use_default_iou_values(self):
"""
Returns if this device uses the default IOU image values.
:returns: boolean
"""
return self._use_default_iou_values
@use_default_iou_values.setter
def use_default_iou_values(self, state):
"""
Sets if this device uses the default IOU image values.
:param state: boolean
"""
self._use_default_iou_values = state
if state:
log.info('IOU "{name}" [{id}]: uses the default IOU image values'.format(name=self._name, id=self._id))
else:
log.info('IOU "{name}" [{id}]: does not use the default IOU image values'.format(name=self._name, id=self._id))
def _check_requirements(self):
"""
Checks if IOUYAP executable is available.
"""
path = self.iouyap_path
if not path:
raise IOUError("No path to iouyap program has been set")
if not os.path.isfile(path):
raise IOUError("iouyap program '{}' is not accessible".format(path))
if not os.access(path, os.X_OK):
raise IOUError("iouyap program '{}' is not executable".format(path))
def __json__(self):
iou_vm_info = {"name": self.name,
"vm_id": self.id,
"console": self._console,
"project_id": self.project.id,
"path": self.path,
"ethernet_adapters": len(self._ethernet_adapters),
"serial_adapters": len(self._serial_adapters),
"ram": self._ram,
"nvram": self._nvram,
"l1_keepalives": self._l1_keepalives,
"initial_config": self.relative_initial_config_file,
"iourc_path": self.iourc_path,
"use_default_iou_values": self._use_default_iou_values}
# return the relative path if the IOU image is in the images_path directory
iou_vm_info["path"] = self.manager.get_relative_image_path(self.path)
return iou_vm_info
@property
def iouyap_path(self):
"""
Returns the IOUYAP executable path.
:returns: path to IOUYAP
"""
path = self._manager.config.get_section_config("IOU").get("iouyap_path", "iouyap")
if path == "iouyap":
path = shutil.which("iouyap")
return path
@property
def iourc_path(self):
"""
Returns the IOURC file path.
:returns: path to IOURC
"""
iourc_path = self._manager.config.get_section_config("IOU").get("iourc_path")
if not iourc_path:
# look for the iourc file in the user home dir.
path = os.path.join(os.path.expanduser("~/"), ".iourc")
if os.path.exists(path):
return path
# look for the iourc file in the current working dir.
path = os.path.join(self.working_dir, "iourc")
if os.path.exists(path):
return path
# look for the iourc file in the temporary dir.
path = os.path.join(self.temporary_directory, "iourc")
if os.path.exists(path):
return path
return iourc_path
@property
def ram(self):
"""
Returns the amount of RAM allocated to this IOU VM.
:returns: amount of RAM in MBytes (integer)
"""
return self._ram
@ram.setter
def ram(self, ram):
"""
Sets amount of RAM allocated to this IOU instance.
:param ram: amount of RAM in MBytes (integer)
"""
if self._ram == ram:
return
log.info('IOU "{name}" [{id}]: RAM updated from {old_ram}MB to {new_ram}MB'.format(name=self._name,
id=self._id,
old_ram=self._ram,
new_ram=ram))
self._ram = ram
@property
def nvram(self):
"""
Returns the mount of NVRAM allocated to this IOU instance.
:returns: amount of NVRAM in KBytes (integer)
"""
return self._nvram
@nvram.setter
def nvram(self, nvram):
"""
Sets amount of NVRAM allocated to this IOU instance.
:param nvram: amount of NVRAM in KBytes (integer)
"""
if self._nvram == nvram:
return
log.info('IOU "{name}" [{id}]: NVRAM updated from {old_nvram}KB to {new_nvram}KB'.format(name=self._name,
id=self._id,
old_nvram=self._nvram,
new_nvram=nvram))
self._nvram = nvram
@BaseVM.name.setter
def name(self, new_name):
"""
Sets the name of this IOU VM.
:param new_name: name
"""
if self.initial_config_file:
content = self.initial_config_content
content = content.replace(self._name, new_name)
self.initial_config_content = content
super(IOUVM, IOUVM).name.__set__(self, new_name)
@property
def application_id(self):
return self._manager.get_application_id(self.id)
@property
def iourc_content(self):
try:
with open(os.path.join(self.temporary_directory, "iourc"), "rb") as f:
return f.read().decode("utf-8")
except OSError:
return None
@iourc_content.setter
def iourc_content(self, value):
if value is not None:
path = os.path.join(self.temporary_directory, "iourc")
try:
with open(path, "wb+") as f:
f.write(value.encode("utf-8"))
except OSError as e:
raise IOUError("Could not write the iourc file {}: {}".format(path, e))
@asyncio.coroutine
def _library_check(self):
"""
Checks for missing shared library dependencies in the IOU image.
"""
try:
output = yield from gns3server.utils.asyncio.subprocess_check_output("ldd", self._path)
except (FileNotFoundError, subprocess.SubprocessError) as e:
log.warn("Could not determine the shared library dependencies for {}: {}".format(self._path, e))
return
p = re.compile("([\.\w]+)\s=>\s+not found")
missing_libs = p.findall(output)
if missing_libs:
raise IOUError("The following shared library dependencies cannot be found for IOU image {}: {}".format(self._path,
", ".join(missing_libs)))
@asyncio.coroutine
def _check_iou_licence(self):
"""
Checks for a valid IOU key in the iourc file (paranoid mode).
"""
license_check = self._manager.config.get_section_config("IOU").getboolean("license_check", True)
if license_check is False:
return
config = configparser.ConfigParser()
try:
with open(self.iourc_path, encoding="utf-8") as f:
config.read_file(f)
except OSError as e:
raise IOUError("Could not open iourc file {}: {}".format(self.iourc_path, e))
except configparser.Error as e:
raise IOUError("Could not parse iourc file {}: {}".format(self.iourc_path, e))
except UnicodeDecodeError as e:
raise IOUError("Non ascii characters in iourc file {}, please remove them: {}".format(self.iourc_path, e))
if "license" not in config:
raise IOUError("License section not found in iourc file {}".format(self.iourc_path))
hostname = socket.gethostname()
if hostname not in config["license"]:
raise IOUError("Hostname key not found in iourc file {}".format(self.iourc_path))
user_ioukey = config["license"][hostname]
if user_ioukey[-1:] != ';':
raise IOUError("IOU key not ending with ; in iourc file".format(self.iourc_path))
if len(user_ioukey) != 17:
raise IOUError("IOU key length is not 16 characters in iourc file".format(self.iourc_path))
user_ioukey = user_ioukey[:16]
# We can't test this because it's mean distributing a valid licence key
# in tests or generating one
if not hasattr(sys, "_called_from_test"):
try:
hostid = (yield from gns3server.utils.asyncio.subprocess_check_output("hostid")).strip()
except FileNotFoundError as e:
raise IOUError("Could not find hostid: {}".format(e))
except subprocess.SubprocessError as e:
raise IOUError("Could not execute hostid: {}".format(e))
try:
ioukey = int(hostid, 16)
except ValueError:
raise IOUError("Invalid hostid detected: {}".format(hostid))
for x in hostname:
ioukey += ord(x)
pad1 = b'\x4B\x58\x21\x81\x56\x7B\x0D\xF3\x21\x43\x9B\x7E\xAC\x1D\xE6\x8A'
pad2 = b'\x80' + 39 * b'\0'
ioukey = hashlib.md5(pad1 + pad2 + struct.pack('!I', ioukey) + pad1).hexdigest()[:16]
if ioukey != user_ioukey:
raise IOUError("Invalid IOU license key {} detected in iourc file {} for host {}".format(user_ioukey,
self.iourc_path,
hostname))
@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()
# created a environment variable pointing to the iourc file.
env = os.environ.copy()
if "IOURC" not in os.environ:
env["IOURC"] = iourc_path
self._command = yield from self._build_command()
try:
log.info("Starting IOU: {}".format(self._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._iou_process = yield from asyncio.create_subprocess_exec(*self._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
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 _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)
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))
self._iouyap_process.kill()
self._iouyap_process = None
self._started = False
def _terminate_process_iouyap(self):
"""
Terminate the IOUYAP process if running.
"""
log.info('Stopping IOUYAP process for IOU VM "{}" PID={}'.format(self.name, self._iouyap_process.pid))
try:
self._iouyap_process.terminate()
# Sometime the process may already be dead when we garbage collect
except ProcessLookupError:
pass
def _terminate_process_iou(self):
"""
Terminate the IOU process if running
"""
log.info('Stopping IOU process for IOU VM "{}" PID={}'.format(self.name, self._iou_process.pid))
try:
self._iou_process.terminate()
# Sometime the process may already be dead when we garbage collect
except ProcessLookupError:
pass
@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: [options]
: unix-js-m | unix-is-m | unix-i-m | ...
: instance identifier (0 < id <= 1024)
Options:
-e Number of Ethernet interfaces (default 2)
-s Number of Serial interfaces (default 2)
-n Size of nvram in Kb (default 64KB)
-b IOS debug string
-c 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 Megabytes of router memory (default 256MB)
-L Disable local console, use remote console
-l Enable Layer 1 keepalive messages
-u 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
initial_config_file = self.initial_config_file
if initial_config_file:
command.extend(["-c", os.path.basename(initial_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
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))
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 initial_config_content(self):
"""
Returns the content of the current initial-config file.
"""
config_file = self.initial_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 configuration file '{}': {}".format(config_file, e))
@initial_config_content.setter
def initial_config_content(self, initial_config):
"""
Update the initial config
:param initial_config: content of the initial configuration file
"""
try:
initial_config_path = os.path.join(self.working_dir, "initial-config.cfg")
if initial_config is None:
initial_config = ''
# We disallow erasing the initial config file
if len(initial_config) == 0 and os.path.exists(initial_config_path):
return
with open(initial_config_path, 'w+', encoding='utf-8') as f:
if len(initial_config) == 0:
f.write('')
else:
initial_config = initial_config.replace("%h", self._name)
f.write(initial_config)
except OSError as e:
raise IOUError("Can't write initial configuration file '{}': {}".format(initial_config_path, e))
@property
def initial_config_file(self):
"""
Returns the initial 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, 'initial-config.cfg')
if os.path.exists(path):
return path
else:
return None
@property
def relative_initial_config_file(self):
"""
Returns the initial config file relative to the project directory.
It's compatible with pre 1.3 projects.
:returns: path to config file. None if the file doesn't exist
"""
path = os.path.join(self.working_dir, 'initial-config.cfg')
if os.path.exists(path):
return 'initial-config.cfg'
else:
return None
@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}'.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))
@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))