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54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
# Copyright (C) 2003-2014 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""
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Ip number related utility functions.
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"""
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import ipaddress
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import re
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import socket
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from .. import log, LOG_CHECK
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def is_valid_ip(ip):
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"""
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Return True if given ip is a valid IPv4 or IPv6 address.
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"""
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try:
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ipaddress.ip_address(ip)
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except ValueError:
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return False
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return True
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def resolve_host(host):
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"""
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@host: hostname or IP address
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Return list of ip numbers for given host.
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"""
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ips = []
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try:
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for res in socket.getaddrinfo(host, None, 0, socket.SOCK_STREAM):
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# res is a tuple (address family, socket type, protocol,
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# canonical name, socket address)
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# add first ip of socket address
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ips.append(res[4][0])
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except socket.error:
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log.info(LOG_CHECK, "Ignored invalid host %r", host)
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return ips
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is_obfuscated_ip = re.compile(r"^(0x[a-f0-9]+|[0-9]+)$").match
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