[FFmpeg-devel] [PATCH v2] avformat: enable UDP IPv6 multicast interface selection using zone index

[Rémi Denis-Courmont]

Le 28 avril 2024 23:11:48 GMT+03:00, Lynne <dev at lynne.ee> a écrit :
>Apr 28, 2024, 20:15 by remi at remlab.net:
>
>> Le torstaina 11. huhtikuuta 2024, 10.50.01 EEST Lynne a écrit :
>>
>>> Is there a reason why we can't switch to IPv4 addresses mapped
>>> in IPv6 and just use the IPv6 API everywhere?
>>>
>>
>> IPv6-mapped IPv4 addresses are pretty much deprecated, if supported anymore. 
>> Some people consider them insecure. But even if you don't agree with that 
>> assessment, the fact of the matter is that they are not portable.
>>
>
>They were they deprecated?

They caused more bugs than they solved problems (because what we need is to add IPv6 to IPv4 apps, not IPv4 to IPv6 apps).

> Why would they not be portable?

Some OS just don't support them, or have a privileged setting to disable them globally. As a user process, you can't rely on them.