IPv6Address.exploded does not support interface name (scope id)

[ohwgiles]

BPO	44012
Nosy	@ohwgiles
PRs	gh-88178: IPv6Address.exploded with scope_id #25824

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-05-02.21:47:15.478>
labels = ['library']
title = 'IPv6Address.exploded does not support interface name (scope id)'
updated_at = <Date 2021-05-02.22:00:23.213>
user = 'https://github.com/ohwgiles'

bugs.python.org fields:

activity = <Date 2021-05-02.22:00:23.213>
actor = 'ohwgiles'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-05-02.21:47:15.478>
creator = 'ohwgiles'
dependencies = []
files = []
hgrepos = []
issue_num = 44012
keywords = ['patch']
message_count = 1.0
messages = ['392740']
nosy_count = 1.0
nosy_names = ['ohwgiles']
pr_nums = ['25824']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue44012'
versions = []

Linked PRs

• [3.15] gh-88178: Fix exploded IPv6 addresses with a scope ID (GH-25824) #155655
• [3.14] gh-88178: Fix exploded IPv6 addresses with a scope ID (GH-25824) #155656
• [3.13] gh-88178: Fix exploded IPv6 addresses with a scope ID (GH-25824) #155657

[ohwgiles]

IPv6 addresses may contain a scope id, for example "fe80::1%eth0".

These are usually required for link-local addresses.

bpo-34788 added support for scoped IPv6 addresses, but missed the
"exploded" method:

>>> import ipaddress
>>> ipaddress.IPv6Address('fe80::1%eth0').exploded
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.9/ipaddress.py", line 394, in exploded
    return self._explode_shorthand_ip_string()
  File "/usr/lib/python3.9/ipaddress.py", line 1824, in _explode_shorthand_ip_string
    ip_int = self._ip_int_from_string(ip_str)
  File "/usr/lib/python3.9/ipaddress.py", line 1705, in _ip_int_from_string
    raise AddressValueError("%s in %r" % (exc, ip_str)) from None
ipaddress.AddressValueError: Only hex digits permitted in '1%eth0' in 'fe80::1%eth0'

[malvidin]

Is it out of scope for this bug to add this check for additional invalid IPv6 Scope IDs?

    elif not scope_id or '%' in scope_id or '\x00' in scope_id: 

cpython/Lib/ipaddress.py

Line 1859 in 99be1cb

elif not scope_id or '%' in scope_id:

Based on RFC4007, section 11.2, paragraph 5
https://datatracker.ietf.org/doc/html/rfc4007.html#section-11.2

[NeevCohen]

I'd like to work on a fix for this. Is this issue still available?