mirror of
https://github.com/Hopiu/linkchecker.git
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91 lines
2.9 KiB
Python
91 lines
2.9 KiB
Python
# -*- coding: iso-8859-1 -*-
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# 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 re
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import socket
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from .. import log, LOG_CHECK
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# IP Adress regular expressions
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# Note that each IPv4 octet can be encoded in dezimal, hexadezimal and octal.
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_ipv4_num = r"\d{1,3}"
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# XXX
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_ipv4_num_4 = r"%s\.%s\.%s\.%s" % ((_ipv4_num,) * 4)
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_ipv4_re = re.compile(r"^%s$" % _ipv4_num_4)
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# IPv6; See also rfc2373
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_ipv6_num = r"[\da-f]{1,4}"
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_ipv6_re = re.compile(r"^%s:%s:%s:%s:%s:%s:%s:%s$" % ((_ipv6_num,) * 8))
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_ipv6_ipv4_re = re.compile(r"^%s:%s:%s:%s:%s:%s:" % ((_ipv6_num,) * 6) + \
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r"%s$" % _ipv4_num_4)
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_ipv6_abbr_re = re.compile(r"^((%s:){0,6}%s)?::((%s:){0,6}%s)?$" % \
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((_ipv6_num,) * 4))
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_ipv6_ipv4_abbr_re = re.compile(r"^((%s:){0,4}%s)?::((%s:){0,5})?" % \
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((_ipv6_num,) * 3) + \
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"%s$" % _ipv4_num_4)
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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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return is_valid_ipv4(ip) or is_valid_ipv6(ip)
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def is_valid_ipv4 (ip):
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"""
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Return True if given ip is a valid IPv4 address.
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"""
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if not _ipv4_re.match(ip):
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return False
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a, b, c, d = [int(i) for i in ip.split(".")]
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return a <= 255 and b <= 255 and c <= 255 and d <= 255
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def is_valid_ipv6 (ip):
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"""
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Return True if given ip is a valid IPv6 address.
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"""
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# XXX this is not complete: check ipv6 and ipv4 semantics too here
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if not (_ipv6_re.match(ip) or _ipv6_ipv4_re.match(ip) or
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_ipv6_abbr_re.match(ip) or _ipv6_ipv4_abbr_re.match(ip)):
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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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