tree de1185c20887e2656b12a6588944627e801f57d1
parent b68f1b1f30ba6c75874eb965b2b9e47734df811c
author Damian Królik <66667989+Damian-Nordic@users.noreply.github.com> 1714048788 +0200
committer GitHub <noreply@github.com> 1714048788 +0000
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[nrfconnect] Optimize packet buffer size (#33137)

Matter requires that regular Matter messages fit in IPv6 MTU
of 1280 bytes so the default packet buffer size of 1583 bytes
seems excessively large for some configurations. Especially
that the buffers only hold the UDP payload in the case of
non-LWIP transports.

There are two exceptions to the above though:
1. Minimal mDNS uses the same packet buffer pool and mDNS
   message size is not limited to 1280 bytes, so shrinking
   the buffer size below MTU might have a negative impact
   on the mDNS behavior.
2. Matter allows definining so called large messages that
   can be bigger than 1280 bytes and sent over TCP, but that
   is not implemented yet and will likely require a different
   allocation mechanism.

Signed-off-by: Damian Krolik <damian.krolik@nordicsemi.no>