48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
import ipaddress
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from django.core.exceptions import ValidationError
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from django.utils.translation import gettext_lazy as _
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def clean_ipv6_address(
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ip_str, unpack_ipv4=False, error_message=_("This is not a valid IPv6 address.")
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):
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"""
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Clean an IPv6 address string.
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Raise ValidationError if the address is invalid.
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Replace the longest continuous zero-sequence with "::", remove leading
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zeroes, and make sure all hextets are lowercase.
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Args:
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ip_str: A valid IPv6 address.
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unpack_ipv4: if an IPv4-mapped address is found,
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return the plain IPv4 address (default=False).
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error_message: An error message used in the ValidationError.
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Return a compressed IPv6 address or the same value.
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"""
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try:
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addr = ipaddress.IPv6Address(int(ipaddress.IPv6Address(ip_str)))
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except ValueError:
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raise ValidationError(error_message, code="invalid")
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if unpack_ipv4 and addr.ipv4_mapped:
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return str(addr.ipv4_mapped)
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elif addr.ipv4_mapped:
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return "::ffff:%s" % str(addr.ipv4_mapped)
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return str(addr)
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def is_valid_ipv6_address(ip_str):
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"""
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Return whether or not the `ip_str` string is a valid IPv6 address.
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"""
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try:
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ipaddress.IPv6Address(ip_str)
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except ValueError:
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return False
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return True
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