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udp: Move EPERM to be alongside EMSGSIZE in tx error handler
0d1b5707b6d8
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Description

udp: Move EPERM to be alongside EMSGSIZE in tx error handler

EPERM can be returned (tested Linux 5.19 & FreeBSD 13) when a packet is
transmitted that is too large for the i/f MTU or an iptables
transmit rule - so it makes sense to treat it like EMSGSIZE
and trigger a pMTU run

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Provenance
chrissie-cAuthored on Nov 9 2022, 8:33 AM

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