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#!/usr/bin/env python3
#
# Simple functional tests for VNC functionality
#
# Copyright 2018, 2024 Red Hat, Inc.
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import fcntl
import os
import socket
import sys
import tempfile
from .config import BUILD_DIR
from typing import List
class Ports():
PORTS_ADDR = '127.0.0.1'
PORTS_RANGE_SIZE = 1024
PORTS_START = 49152 + ((os.getpid() * PORTS_RANGE_SIZE) % 16384)
PORTS_END = PORTS_START + PORTS_RANGE_SIZE
def __enter__(self):
lock_file = os.path.join(BUILD_DIR, "tests", "functional", "port_lock")
self.lock_fh = os.open(lock_file, os.O_CREAT)
fcntl.flock(self.lock_fh, fcntl.LOCK_EX)
return self
def __exit__(self, exc_type, exc_value, traceback):
fcntl.flock(self.lock_fh, fcntl.LOCK_UN)
os.close(self.lock_fh)
def check_bind(self, port: int) -> bool:
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
try:
sock.bind((self.PORTS_ADDR, port))
except OSError:
return False
return True
def find_free_ports(self, count: int) -> List[int]:
result = []
for port in range(self.PORTS_START, self.PORTS_END):
if self.check_bind(port):
result.append(port)
if len(result) >= count:
break
assert len(result) == count
return result
def find_free_port(self) -> int:
return self.find_free_ports(1)[0]
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