1""" 2QEMU development and testing utilities 3 4This package provides a small handful of utilities for performing 5various tasks not directly related to the launching of a VM. 6""" 7 8# Copyright (C) 2021 Red Hat Inc. 9# 10# Authors: 11# John Snow <jsnow@redhat.com> 12# Cleber Rosa <crosa@redhat.com> 13# 14# This work is licensed under the terms of the GNU GPL, version 2. See 15# the COPYING file in the top-level directory. 16# 17 18import re 19from typing import Optional 20 21# pylint: disable=import-error 22from .accel import kvm_available, list_accel, tcg_available 23 24 25__all__ = ( 26 'get_info_usernet_hostfwd_port', 27 'kvm_available', 28 'list_accel', 29 'tcg_available', 30) 31 32 33def get_info_usernet_hostfwd_port(info_usernet_output: str) -> Optional[int]: 34 """ 35 Returns the port given to the hostfwd parameter via info usernet 36 37 :param info_usernet_output: output generated by hmp command "info usernet" 38 :return: the port number allocated by the hostfwd option 39 """ 40 for line in info_usernet_output.split('\r\n'): 41 regex = r'TCP.HOST_FORWARD.*127\.0\.0\.1\s+(\d+)\s+10\.' 42 match = re.search(regex, line) 43 if match is not None: 44 return int(match[1]) 45 return None 46