34 lines
938 B
Python
34 lines
938 B
Python
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"""
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QEMU utility library
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This offers miscellaneous utility functions, which may not be easily
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distinguishable or numerous to be in their own module.
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"""
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# Copyright (C) 2021 Red Hat Inc.
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#
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# Authors:
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# Cleber Rosa <crosa@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2. See
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# the COPYING file in the top-level directory.
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#
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import re
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from typing import Optional
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def get_info_usernet_hostfwd_port(info_usernet_output: str) -> Optional[int]:
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"""
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Returns the port given to the hostfwd parameter via info usernet
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:param info_usernet_output: output generated by hmp command "info usernet"
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:return: the port number allocated by the hostfwd option
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"""
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for line in info_usernet_output.split('\r\n'):
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regex = r'TCP.HOST_FORWARD.*127\.0\.0\.1\s+(\d+)\s+10\.'
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match = re.search(regex, line)
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if match is not None:
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return int(match[1])
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return None
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