"""
QEMU development and testing utilities
This package provides a small handful of utilities for performing
various tasks not directly related to the launching of a VM.
"""
# Copyright (C) 2021 Red Hat Inc.
#
# Authors:
# John Snow <jsnow@redhat.com>
# Cleber Rosa <crosa@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2. See
# the COPYING file in the top-level directory.
#
import re
from typing import Optional
# pylint: disable=import-error
from .accel import kvm_available, list_accel, tcg_available
__all__ = (
'get_info_usernet_hostfwd_port',
'kvm_available',
'list_accel',
'tcg_available',
)
[docs]def get_info_usernet_hostfwd_port(info_usernet_output: str) -> Optional[int]:
"""
Returns the port given to the hostfwd parameter via info usernet
:param info_usernet_output: output generated by hmp command "info usernet"
:return: the port number allocated by the hostfwd option
"""
for line in info_usernet_output.split('\r\n'):
regex = r'TCP.HOST_FORWARD.*127\.0\.0\.1\s+(\d+)\s+10\.'
match = re.search(regex, line)
if match is not None:
return int(match[1])
return None