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Created on 2011-06-20 09:58 by Aleksey Zhurbitsky, last changed 2022-04-11 14:57 by admin. This issue is now closed.
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| msg138696 - (view) | Author: Aleksey Zhurbitsky (Aleksey Zhurbitsky) | Date: 2011-06-20 09:58 | |
I use http://svn.python.org/projects/python/trunk/Demo/sockets/mcast.py to receive multicast stream. When i run one instance of this script to receive certain multicats stream all is fine, but when i run two instance of this script simultaneously to join different multicats stream whith same port - starts mess. Each script gets his packets and packets from other multicast group. Examples of multicast groups: rtp://224.1.1.1:1234 rtp://224.1.1.2:1234 I also try to use other code to recive multicast but got the same result - http://stackoverflow.com/questions/6387535/duplicate-packets-in-python-multicast-receiver |
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| msg138708 - (view) | Author: Charles-François Natali (neologix) *  |
Date: 2011-06-20 13:38 | |
This is normal. You're binding twice to the same port thanks to SO_REUSEADDR, but in case of multiple binds to the same UDP port, all packets received are duplicated by the kernel to every socket. Closing as invalid. |
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| msg138709 - (view) | Author: Charles-François Natali (neologix) * |
Date: 2011-06-20 13:40 | |
Note that the duplication is mandatory for multicast, but with unicast the kernel is free to do whatever he wants, most of the time only one socket will receive it. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:18 | admin | set | github: 56582 |
| 2011-06-20 13:40:56 | neologix | set | messages: + msg138709 |
| 2011-06-20 13:38:08 | neologix | set | status: open -> closed nosy: + neologix messages: + msg138708 resolution: not a bug |
| 2011-06-20 09:58:06 | Aleksey Zhurbitsky | create | |