tree e74900cf54d9476463bde2bac7a8c3e040ff18a6
parent d842aaf9b5b45c6a0851542e8c9d21032f99a249
author Lorenz Brun <lorenz@monogon.tech> 1739878001 +0100
committer Lorenz Brun <lorenz@monogon.tech> 1740499453 +0000

m/n/c/network: drop random snat mapping workaround

Linux has since fixed the issue that if two connections get assigned the
same mapped port/address combo one of them drops the packet. Instead
they just "requeue" it so it gets a new non-conflicting mapping.

This allows us the drop the workaround that mappings need to be
generated on a per-connection basis instead of just a per-port basis,
this makes Linux behave more like an endpoint-independent NAT which is
better for anything trying to establish P2P connections and also a bit
easier to debug as source ports get preserved if possible.

Change-Id: Ibfaf63746a269ec6bf0444e8c7dddb3a51b07900
Reviewed-on: https://review.monogon.dev/c/monogon/+/3907
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI