This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Title: Can't receive replies from multicast UDP with asyncio
Type: behavior Stage: resolved
Components: asyncio Versions: Python 3.8
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: iritkatriel, miss-islington, vxgmichel, yselivanov
Priority: normal Keywords: patch

Created on 2017-11-02 10:51 by vxgmichel, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Pull Requests
URL Status Linked Edit
PR 423 merged vxgmichel, 2017-11-02 10:51
PR 13162 merged miss-islington, 2019-05-07 17:19
Messages (4)
msg305415 - (view) Author: Vincent Michel (vxgmichel) * Date: 2017-11-02 10:51
It's currently not possible to receive replies from multicast UDP with asyncio, as reported in the following issue:

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:

I already submitted a PR on the cpython repository:

I figured it was better to report the issue here for better tracking.
msg341785 - (view) Author: miss-islington (miss-islington) Date: 2019-05-07 17:18
New changeset 63deaa5b70108ef441c57728322da6b4321db4fc by Miss Islington (bot) (Vincent Michel) in branch 'master':
bpo-31922: Do not connect UDP sockets when broadcast is allowed (GH-423)
msg341791 - (view) Author: miss-islington (miss-islington) Date: 2019-05-07 17:45
New changeset 19ca5b500af4b66e1082a03d8fbf448e1f56af30 by Miss Islington (bot) in branch '3.7':
bpo-31922: Do not connect UDP sockets when broadcast is allowed (GH-423)
msg378771 - (view) Author: Irit Katriel (iritkatriel) * (Python committer) Date: 2020-10-16 22:25
Can this be closed?
Date User Action Args
2022-04-11 14:58:53adminsetgithub: 76103
2020-10-21 15:10:51iritkatrielsetstatus: open -> closed
resolution: fixed
stage: patch review -> resolved
2020-10-16 22:25:53iritkatrielsetnosy: + iritkatriel
messages: + msg378771
2019-12-06 18:57:39vstinnerlinkissue27822 superseder
2019-05-07 17:45:58miss-islingtonsetmessages: + msg341791
2019-05-07 17:19:03miss-islingtonsetkeywords: + patch
stage: patch review
pull_requests: + pull_request13081
2019-05-07 17:18:53miss-islingtonsetnosy: + miss-islington
messages: + msg341785
2018-09-14 19:33:25vstinnersetversions: - Python 3.4, Python 3.5, Python 3.6, Python 3.7
2017-11-02 10:51:16vxgmichelcreate