mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-11-17 09:14:52 +02:00
67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2014 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/>.
|
|
|
|
"""
|
|
Useful functions... in the attic ;)
|
|
"""
|
|
|
|
import socket
|
|
import errno
|
|
|
|
|
|
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 Exception("Invalid port range {}-{}".format(start_port, end_port))
|
|
|
|
if socket_type == "UDP":
|
|
socket_type = socket.SOCK_DGRAM
|
|
else:
|
|
socket_type = socket.SOCK_STREAM
|
|
|
|
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.bind((host, port)) # the port is available if bind is a success
|
|
else:
|
|
with socket.socket(socket.AF_INET, socket_type) as s:
|
|
s.bind((host, port)) # the port is available if bind is a success
|
|
return port
|
|
except OSError as e:
|
|
if e.errno == errno.EADDRINUSE: # socket already in use
|
|
if port + 1 == end_port:
|
|
break
|
|
else:
|
|
continue
|
|
else:
|
|
raise Exception("Could not find an unused port: {}".format(e))
|
|
|
|
raise Exception("Could not find a free port between {0} and {1}".format(start_port, end_port))
|