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Use ipaddress in network.iputil.is_valid_ip()

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ipaddress was introduced in Python 3.3.
This commit is contained in:
Chris Mayo 2020-03-31 19:46:31 +01:00
parent 2eb1424703
commit 504004d4f0
1 changed files with 4 additions and 41 deletions
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45
linkcheck/network/iputil.py
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@ -18,55 +18,18 @@
Ip number related utility functions.
"""
import ipaddress
import re
import socket
from .. import log, LOG_CHECK
# IP Adress regular expressions
# Note that each IPv4 octet can be encoded in dezimal, hexadezimal and octal.
_ipv4_num = r"\d{1,3}"
# XXX
_ipv4_num_4 = r"%s\.%s\.%s\.%s" % ((_ipv4_num,) * 4)
_ipv4_re = re.compile(r"^%s$" % _ipv4_num_4)
# IPv6; See also rfc2373
_ipv6_num = r"[\da-f]{1,4}"
_ipv6_re = re.compile(r"^%s:%s:%s:%s:%s:%s:%s:%s$" % ((_ipv6_num,) * 8))
_ipv6_ipv4_re = re.compile(r"^%s:%s:%s:%s:%s:%s:" % ((_ipv6_num,) * 6) + \
r"%s$" % _ipv4_num_4)
_ipv6_abbr_re = re.compile(r"^((%s:){0,6}%s)?::((%s:){0,6}%s)?$" % \
((_ipv6_num,) * 4))
_ipv6_ipv4_abbr_re = re.compile(r"^((%s:){0,4}%s)?::((%s:){0,5})?" % \
((_ipv6_num,) * 3) + \
"%s$" % _ipv4_num_4)
def is_valid_ip (ip):
"""
Return True if given ip is a valid IPv4 or IPv6 address.
"""
return is_valid_ipv4(ip) or is_valid_ipv6(ip)
def is_valid_ipv4 (ip):
"""
Return True if given ip is a valid IPv4 address.
"""
if not _ipv4_re.match(ip):
return False
a, b, c, d = [int(i) for i in ip.split(".")]
return a <= 255 and b <= 255 and c <= 255 and d <= 255
def is_valid_ipv6 (ip):
"""
Return True if given ip is a valid IPv6 address.
"""
# XXX this is not complete: check ipv6 and ipv4 semantics too here
if not (_ipv6_re.match(ip) or _ipv6_ipv4_re.match(ip) or
_ipv6_abbr_re.match(ip) or _ipv6_ipv4_abbr_re.match(ip)):
try:
ipaddress.ip_address(ip)
except ValueError:
return False
return True