mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-22 22:22:25 +00:00
264 lines
9.1 KiB
Python
264 lines
9.1 KiB
Python
#
|
|
# Copyright (C) 2015 GNS3 Technologies Inc.
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
"""
|
|
Represents a uBridge hypervisor and starts/stops the associated uBridge process.
|
|
"""
|
|
|
|
import sys
|
|
import os
|
|
import subprocess
|
|
import asyncio
|
|
import socket
|
|
import re
|
|
|
|
from gns3server.utils import parse_version
|
|
from gns3server.utils.asyncio import wait_for_process_termination
|
|
from gns3server.utils.asyncio import monitor_process
|
|
from gns3server.utils.asyncio import subprocess_check_output
|
|
from .ubridge_hypervisor import UBridgeHypervisor
|
|
from .ubridge_error import UbridgeError
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class Hypervisor(UBridgeHypervisor):
|
|
|
|
"""
|
|
Hypervisor.
|
|
|
|
:param project: Project instance
|
|
:param path: path to uBridge executable
|
|
:param working_dir: working directory
|
|
:param host: host/address for this hypervisor
|
|
:param port: port for this hypervisor
|
|
"""
|
|
|
|
_instance_count = 1
|
|
|
|
def __init__(self, project, path, working_dir, host, port=None):
|
|
|
|
if port is None:
|
|
try:
|
|
port = None
|
|
info = socket.getaddrinfo(host, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
|
|
if not info:
|
|
raise UbridgeError(f"getaddrinfo returns an empty list on {host}")
|
|
for res in info:
|
|
af, socktype, proto, _, sa = res
|
|
# let the OS find an unused port for the uBridge hypervisor
|
|
with socket.socket(af, socktype, proto) as sock:
|
|
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
sock.bind(sa)
|
|
port = sock.getsockname()[1]
|
|
break
|
|
except OSError as e:
|
|
raise UbridgeError(f"Could not find free port for the uBridge hypervisor: {e}")
|
|
|
|
super().__init__(host, port)
|
|
self._project = project
|
|
self._path = path
|
|
self._working_dir = working_dir
|
|
self._command = []
|
|
self._process = None
|
|
self._stdout_file = ""
|
|
self._started = False
|
|
self._version = ""
|
|
|
|
@property
|
|
def process(self):
|
|
"""
|
|
Returns the subprocess of the Hypervisor
|
|
|
|
:returns: subprocess
|
|
"""
|
|
|
|
return self._process
|
|
|
|
@property
|
|
def started(self):
|
|
"""
|
|
Returns either this hypervisor has been started or not.
|
|
|
|
:returns: boolean
|
|
"""
|
|
|
|
return self._started
|
|
|
|
@property
|
|
def path(self):
|
|
"""
|
|
Returns the path to the uBridge executable.
|
|
|
|
:returns: path to uBridge
|
|
"""
|
|
|
|
return self._path
|
|
|
|
@path.setter
|
|
def path(self, path):
|
|
"""
|
|
Sets the path to the uBridge executable.
|
|
|
|
:param path: path to uBridge
|
|
"""
|
|
|
|
self._path = path
|
|
|
|
@property
|
|
def version(self):
|
|
"""
|
|
Returns the uBridge version.
|
|
|
|
:returns: string
|
|
"""
|
|
|
|
return self._version
|
|
|
|
async def _check_ubridge_version(self, env=None):
|
|
"""
|
|
Checks if the ubridge executable version
|
|
"""
|
|
try:
|
|
output = await subprocess_check_output(self._path, "-v", cwd=self._working_dir, env=env)
|
|
match = re.search(r"ubridge version ([0-9a-z\.]+)", output)
|
|
if match:
|
|
self._version = match.group(1)
|
|
if sys.platform.startswith("win") or sys.platform.startswith("darwin"):
|
|
minimum_required_version = "0.9.12"
|
|
else:
|
|
# uBridge version 0.9.14 is required for packet filters
|
|
# to work for IOU nodes.
|
|
minimum_required_version = "0.9.14"
|
|
if parse_version(self._version) < parse_version(minimum_required_version):
|
|
raise UbridgeError(f"uBridge executable version must be >= {minimum_required_version}")
|
|
else:
|
|
raise UbridgeError(f"Could not determine uBridge version for {self._path}")
|
|
except (OSError, subprocess.SubprocessError) as e:
|
|
raise UbridgeError(f"Error while looking for uBridge version: {e}")
|
|
|
|
async def start(self):
|
|
"""
|
|
Starts the uBridge hypervisor process.
|
|
"""
|
|
|
|
env = os.environ.copy()
|
|
if sys.platform.startswith("win"):
|
|
# add the Npcap directory to $PATH to force uBridge to use npcap DLL instead of Winpcap (if installed)
|
|
system_root = os.path.join(os.path.expandvars("%SystemRoot%"), "System32", "Npcap")
|
|
if os.path.isdir(system_root):
|
|
env["PATH"] = system_root + ';' + env["PATH"]
|
|
await self._check_ubridge_version(env)
|
|
try:
|
|
command = self._build_command()
|
|
log.info(f"starting ubridge: {command}")
|
|
self._stdout_file = os.path.join(self._working_dir, "ubridge.log")
|
|
log.info(f"logging to {self._stdout_file}")
|
|
with open(self._stdout_file, "w", encoding="utf-8") as fd:
|
|
self._process = await asyncio.create_subprocess_exec(*command,
|
|
stdout=fd,
|
|
stderr=subprocess.STDOUT,
|
|
cwd=self._working_dir,
|
|
env=env)
|
|
|
|
log.info(f"ubridge started PID={self._process.pid}")
|
|
# recv: Bad address is received by uBridge when a docker image stops by itself
|
|
# see https://github.com/GNS3/gns3-gui/issues/2957
|
|
#monitor_process(self._process, self._termination_callback)
|
|
except (OSError, subprocess.SubprocessError) as e:
|
|
ubridge_stdout = self.read_stdout()
|
|
log.error(f"Could not start ubridge: {e}\n{ubridge_stdout}")
|
|
raise UbridgeError(f"Could not start ubridge: {e}\n{ubridge_stdout}")
|
|
|
|
def _termination_callback(self, returncode):
|
|
"""
|
|
Called when the process has stopped.
|
|
|
|
:param returncode: Process returncode
|
|
"""
|
|
|
|
if returncode != 0:
|
|
error_msg = f"uBridge process has stopped, return code: {returncode}\n{self.read_stdout()}\n"
|
|
log.error(error_msg)
|
|
self._project.emit("log.error", {"message": error_msg})
|
|
else:
|
|
log.info("uBridge process has stopped, return code: %d", returncode)
|
|
|
|
async def stop(self):
|
|
"""
|
|
Stops the uBridge hypervisor process.
|
|
"""
|
|
|
|
if self.is_running():
|
|
log.info(f"Stopping uBridge process PID={self._process.pid}")
|
|
await UBridgeHypervisor.stop(self)
|
|
try:
|
|
await wait_for_process_termination(self._process, timeout=3)
|
|
except asyncio.TimeoutError:
|
|
if self._process and self._process.returncode is None:
|
|
log.warning(f"uBridge process {self._process.pid} is still running... killing it")
|
|
try:
|
|
self._process.kill()
|
|
except ProcessLookupError:
|
|
pass
|
|
|
|
if self._stdout_file and os.access(self._stdout_file, os.W_OK):
|
|
try:
|
|
os.remove(self._stdout_file)
|
|
except OSError as e:
|
|
log.warning(f"could not delete temporary uBridge log file: {e}")
|
|
self._process = None
|
|
self._started = False
|
|
|
|
def read_stdout(self):
|
|
"""
|
|
Reads the standard output of the uBridge process.
|
|
Only use when the process has been stopped or has crashed.
|
|
"""
|
|
|
|
output = ""
|
|
if self._stdout_file and os.access(self._stdout_file, os.R_OK):
|
|
try:
|
|
with open(self._stdout_file, "rb") as file:
|
|
output = file.read().decode("utf-8", errors="replace")
|
|
except OSError as e:
|
|
log.warning(f"could not read {self._stdout_file}: {e}")
|
|
return output
|
|
|
|
def is_running(self):
|
|
"""
|
|
Checks if the process is running
|
|
|
|
:returns: True or False
|
|
"""
|
|
|
|
if self._process and self._process.returncode is None:
|
|
return True
|
|
return False
|
|
|
|
def _build_command(self):
|
|
"""
|
|
Command to start the uBridge hypervisor process.
|
|
(to be passed to subprocess.Popen())
|
|
"""
|
|
|
|
command = [self._path]
|
|
command.extend(["-H", f"{self._host}:{self._port}"])
|
|
if log.getEffectiveLevel() == logging.DEBUG:
|
|
command.extend(["-d", "1"])
|
|
return command
|