[Backport v3.7-branch] net: dns: Add per socket user data for the dispatcher #78281
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The socket services API has a limitation where the user data is shared between file descriptors described in the same service. This can cause problem in DNS dispatcher where each listened socket needs to have their own dispatcher struct set as user data so that we can map between dispatcher context and socket. Solve this by always have a dispatcher table as user data, and then have the actual mapping done via the dispatcher table when receiving data to the dispatcher socket. Fixes #78146 Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no> (cherry picked from commit caf9fd3)
If the dispatcher is muxing the connection i.e., so there are two services for the same port, then mark service socket descriptor of the service with the socket number so that "net sockets" shell command can show a proper value for it. Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no> (cherry picked from commit 1f627e3)
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Sep 11, 2024
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Backport 1f627e3~2..1f627e3 from #78148.
Fixes #78146