asyncio DatagramTransport.sendto does not send multicast UDP packets #113812
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@joudinet This is not enough information for us to help you. There could be a bug in your program. I don't know much about UDP multicast, and there doesn't seem to be any special provision for it in asyncio. (Does it work by using a specific IP address? Maybe the socket needs to have some flag applied to enable multicast.) Can you narrow the problem down to a program that's small enough to paste into a comment here and simple enough for someone to try running locally? |
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Bug report
Bug description:
Trying to send multicast UDP packets with DatagramTransport.sendto, I notice no error on the python program but no packet is sent (I've checked with tcpdump). Modifying the call to use the underlying socket fixes the issue but I get a warning that I should not use this socket directly.
Is this a known issue?
How should I use asyncio to properly send UDP multicast packets?
CPython versions tested on:
3.10
Operating systems tested on:
Linux
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