Can't receive replies from multicast UDP with asyncio

[vxgmichel]

BPO	31922
Nosy	@1st1, @vxgmichel, @miss-islington, @iritkatriel
PRs	bpo-31922: Do not connect UDP sockets when broadcast is allowed #423 [3.7] bpo-31922: Do not connect UDP sockets when broadcast is allowed (GH-423) #13162

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

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GitHub fields:

assignee = None
closed_at = <Date 2020-10-21.15:10:51.456>
created_at = <Date 2017-11-02.10:51:16.167>
labels = ['type-bug', '3.8', 'expert-asyncio']
title = "Can't receive replies from multicast UDP with asyncio"
updated_at = <Date 2020-10-21.15:10:51.456>
user = 'https://github.com/vxgmichel'

bugs.python.org fields:

activity = <Date 2020-10-21.15:10:51.456>
actor = 'iritkatriel'
assignee = 'none'
closed = True
closed_date = <Date 2020-10-21.15:10:51.456>
closer = 'iritkatriel'
components = ['asyncio']
creation = <Date 2017-11-02.10:51:16.167>
creator = 'vxgmichel'
dependencies = []
files = []
hgrepos = []
issue_num = 31922
keywords = ['patch']
message_count = 4.0
messages = ['305415', '341785', '341791', '378771']
nosy_count = 4.0
nosy_names = ['yselivanov', 'vxgmichel', 'miss-islington', 'iritkatriel']
pr_nums = ['423', '13162']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue31922'
versions = ['Python 3.8']

[vxgmichel]

It's currently not possible to receive replies from multicast UDP with asyncio, as reported in the following issue:

python/asyncio#480

That's because asyncio connects the UDP socket to the broadcast address, causing all traffic from the receivers to be be dropped, as explained in this comment:
python/asyncio#480 (comment)

I already submitted a PR on the cpython repository:
#423

I figured it was better to report the issue here for better tracking.

[miss-islington]

New changeset 63deaa5 by Miss Islington (bot) (Vincent Michel) in branch 'master':
bpo-31922: Do not connect UDP sockets when broadcast is allowed (GH-423)
63deaa5

[miss-islington]

New changeset 19ca5b5 by Miss Islington (bot) in branch '3.7':
bpo-31922: Do not connect UDP sockets when broadcast is allowed (GH-423)
19ca5b5

[iritkatriel]

Can this be closed?