mirror of https://github.com/GNS3/gns3-server
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
267 lines
8.7 KiB
267 lines
8.7 KiB
# -*- 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 <http://www.gnu.org/licenses/>.
|
|
|
|
import socket
|
|
import sys
|
|
import ipaddress
|
|
from aiohttp.web import HTTPConflict
|
|
from gns3server.config import Config
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class PortManager:
|
|
|
|
"""
|
|
:param host: IP address to bind for console connections
|
|
"""
|
|
|
|
def __init__(self, host="127.0.0.1"):
|
|
|
|
self._console_host = host
|
|
self._udp_host = host
|
|
|
|
self._used_tcp_ports = set()
|
|
self._used_udp_ports = set()
|
|
|
|
server_config = Config.instance().get_section_config("Server")
|
|
remote_console_connections = server_config.getboolean("allow_remote_console")
|
|
|
|
console_start_port_range = server_config.getint("console_start_port_range", 2000)
|
|
console_end_port_range = server_config.getint("console_end_port_range", 5000)
|
|
self._console_port_range = (console_start_port_range, console_end_port_range)
|
|
log.debug("Console port range is {}-{}".format(console_start_port_range, console_end_port_range))
|
|
|
|
udp_start_port_range = server_config.getint("udp_start_port_range", 10000)
|
|
udp_end_port_range = server_config.getint("udp_end_port_range", 20000)
|
|
self._udp_port_range = (udp_start_port_range, udp_end_port_range)
|
|
log.debug("UDP port range is {}-{}".format(udp_start_port_range, udp_end_port_range))
|
|
|
|
if remote_console_connections:
|
|
log.warning("Remote console connections are allowed")
|
|
if ipaddress.ip_address(host).version == 6:
|
|
self._console_host = "::"
|
|
else:
|
|
self._console_host = "0.0.0.0"
|
|
else:
|
|
self._console_host = host
|
|
|
|
PortManager._instance = self
|
|
|
|
@classmethod
|
|
def instance(cls):
|
|
"""
|
|
Singleton to return only one instance of PortManager.
|
|
|
|
:returns: instance of PortManager
|
|
"""
|
|
|
|
if not hasattr(cls, "_instance") or cls._instance is None:
|
|
cls._instance = cls()
|
|
return cls._instance
|
|
|
|
@property
|
|
def console_host(self):
|
|
|
|
return self._console_host
|
|
|
|
@console_host.setter
|
|
def console_host(self, new_host):
|
|
|
|
self._console_host = new_host
|
|
|
|
@property
|
|
def console_port_range(self):
|
|
|
|
return self._console_port_range
|
|
|
|
@console_host.setter
|
|
def console_port_range(self, new_range):
|
|
|
|
assert isinstance(new_range, tuple)
|
|
self._console_port_range = new_range
|
|
|
|
@property
|
|
def udp_host(self):
|
|
|
|
return self._udp_host
|
|
|
|
@udp_host.setter
|
|
def host(self, new_host):
|
|
|
|
self._udp_host = new_host
|
|
|
|
@property
|
|
def udp_port_range(self):
|
|
|
|
return self._udp_port_range
|
|
|
|
@udp_host.setter
|
|
def udp_port_range(self, new_range):
|
|
|
|
assert isinstance(new_range, tuple)
|
|
self._udp_port_range = new_range
|
|
|
|
@property
|
|
def tcp_ports(self):
|
|
|
|
return self._used_tcp_ports
|
|
|
|
@property
|
|
def udp_ports(self):
|
|
|
|
return self._used_udp_ports
|
|
|
|
@staticmethod
|
|
def find_unused_port(start_port, end_port, host="127.0.0.1", socket_type="TCP", ignore_ports=[]):
|
|
"""
|
|
Finds an unused port in a range.
|
|
|
|
:param start_port: first port in the range
|
|
:param end_port: last port in the range
|
|
:param host: host/address for bind()
|
|
:param socket_type: TCP (default) or UDP
|
|
:param ignore_ports: list of port to ignore within the range
|
|
"""
|
|
|
|
if end_port < start_port:
|
|
raise HTTPConflict(text="Invalid port range {}-{}".format(start_port, end_port))
|
|
|
|
if socket_type == "UDP":
|
|
socket_type = socket.SOCK_DGRAM
|
|
else:
|
|
socket_type = socket.SOCK_STREAM
|
|
|
|
last_exception = None
|
|
for port in range(start_port, end_port + 1):
|
|
if port in ignore_ports:
|
|
continue
|
|
try:
|
|
if ":" in host:
|
|
# IPv6 address support
|
|
with socket.socket(socket.AF_INET6, socket_type) as s:
|
|
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
s.bind((host, port)) # the port is available if bind is a success
|
|
else:
|
|
with socket.socket(socket.AF_INET, socket_type) as s:
|
|
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
s.bind((host, port)) # the port is available if bind is a success
|
|
return port
|
|
except OSError as e:
|
|
last_exception = e
|
|
if port + 1 == end_port:
|
|
break
|
|
else:
|
|
continue
|
|
|
|
raise HTTPConflict(text="Could not find a free port between {} and {} on host {}, last exception: {}".format(start_port,
|
|
end_port,
|
|
host,
|
|
last_exception))
|
|
|
|
def get_free_tcp_port(self, project):
|
|
"""
|
|
Get an available TCP port and reserve it
|
|
|
|
:param project: Project instance
|
|
"""
|
|
|
|
port = self.find_unused_port(self._console_port_range[0],
|
|
self._console_port_range[1],
|
|
host=self._console_host,
|
|
socket_type="TCP",
|
|
ignore_ports=self._used_tcp_ports)
|
|
|
|
self._used_tcp_ports.add(port)
|
|
project.record_tcp_port(port)
|
|
log.debug("TCP port {} has been allocated".format(port))
|
|
return port
|
|
|
|
def reserve_tcp_port(self, port, project):
|
|
"""
|
|
Reserve a specific TCP port number
|
|
|
|
:param port: TCP port number
|
|
:param project: Project instance
|
|
"""
|
|
|
|
if port in self._used_tcp_ports:
|
|
raise HTTPConflict(text="TCP port {} already in use on host".format(port, self._console_host))
|
|
self._used_tcp_ports.add(port)
|
|
project.record_tcp_port(port)
|
|
log.debug("TCP port {} has been reserved".format(port))
|
|
return port
|
|
|
|
def release_tcp_port(self, port, project):
|
|
"""
|
|
Release a specific TCP port number
|
|
|
|
:param port: TCP port number
|
|
:param project: Project instance
|
|
"""
|
|
|
|
if port in self._used_tcp_ports:
|
|
self._used_tcp_ports.remove(port)
|
|
project.remove_tcp_port(port)
|
|
log.debug("TCP port {} has been released".format(port))
|
|
|
|
def get_free_udp_port(self, project):
|
|
"""
|
|
Get an available UDP port and reserve it
|
|
|
|
:param project: Project instance
|
|
"""
|
|
|
|
port = self.find_unused_port(self._udp_port_range[0],
|
|
self._udp_port_range[1],
|
|
host=self._udp_host,
|
|
socket_type="UDP",
|
|
ignore_ports=self._used_udp_ports)
|
|
|
|
self._used_udp_ports.add(port)
|
|
project.record_udp_port(port)
|
|
log.debug("UDP port {} has been allocated".format(port))
|
|
return port
|
|
|
|
def reserve_udp_port(self, port, project):
|
|
"""
|
|
Reserve a specific UDP port number
|
|
|
|
:param port: UDP port number
|
|
:param project: Project instance
|
|
"""
|
|
|
|
if port in self._used_udp_ports:
|
|
raise HTTPConflict(text="UDP port {} already in use on host".format(port, self._console_host))
|
|
self._used_udp_ports.add(port)
|
|
project.record_udp_port(port)
|
|
log.debug("UDP port {} has been reserved".format(port))
|
|
|
|
def release_udp_port(self, port, project):
|
|
"""
|
|
Release a specific UDP port number
|
|
|
|
:param port: UDP port number
|
|
:param project: Project instance
|
|
"""
|
|
|
|
if port in self._used_udp_ports:
|
|
self._used_udp_ports.remove(port)
|
|
project.remove_udp_port(port)
|
|
log.debug("UDP port {} has been released".format(port))
|