# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import socket
[docs]
def get_open_ports(number) -> list:
"""Gets the number of open ports from the system.
Note: the returned ports are only guaranteed to be accessible from the same host.
Args:
number: number of ports
Returns:
A list of open_ports
"""
ports = []
sockets = []
for i in range(number):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("", 0))
s.listen(1)
# to prevent the same port number used multiple times, we only close it after all ports are obtained
sockets.append(s)
port = s.getsockname()[1]
if port > 0:
ports.append(port)
# close obtained ports
for s in sockets:
s.close()
if len(ports) != number:
raise RuntimeError(
"Could not get enough open ports from the system. Needed {} but got {}.".format(number, len(ports))
)
return ports
[docs]
def get_local_addresses(number, host_name=None) -> list:
"""Return a list of local addresses
Args:
number: the number of addresses wanted
host_name: name of the local host
Returns:
"""
if not host_name:
host_name = "127.0.0.1"
ports = get_open_ports(number)
return [f"{host_name}:{p}" for p in ports]