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