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76 lines
2.5 KiB
76 lines
2.5 KiB
# -*- coding: utf-8 -*-
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#
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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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import ipaddress
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from .attic import find_unused_port
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class PortManager:
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"""
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:param console: TCP console port
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:param console_host: IP address to bind for console connections
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:param console_start_port_range: TCP console port range start
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:param console_end_port_range: TCP console port range end
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"""
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def __init__(self,
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console_host,
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console_bind_to_any,
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console_start_port_range=10000,
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console_end_port_range=15000):
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self._console_start_port_range = console_start_port_range
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self._console_end_port_range = console_end_port_range
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self._used_ports = set()
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if console_bind_to_any:
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if ipaddress.ip_address(console_host).version == 6:
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self._console_host = "::"
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else:
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self._console_host = "0.0.0.0"
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else:
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self._console_host = console_host
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def get_free_port(self):
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"""Get an available console port and reserve it"""
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port = find_unused_port(self._console_start_port_range,
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self._console_end_port_range,
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host=self._console_host,
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socket_type='TCP',
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ignore_ports=self._used_ports)
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self._used_ports.add(port)
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return port
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def reserve_port(self, port):
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"""
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Reserve a specific port number
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:param port: Port number
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"""
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if port in self._used_ports:
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raise Exception("Port already {} in use".format(port))
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self._used_ports.add(port)
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def release_port(self, port):
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"""
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Release a specific port number
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:param port: Port number
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"""
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self._used_ports.remove(port)
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