From 968905ab76aba874bc4818eb3a491b94241aca25 Mon Sep 17 00:00:00 2001
From: networkException <git@nwex.de>
Date: Wed, 13 Dec 2023 02:55:50 +0100
Subject: [PATCH] nixos/caddy: also increase socket send buffer size as
 recommended by upstream

this patch adjusts the `boot.kernel.sysctl."net.core.wmem_max"` to match the
value suggested in the quic-go wiki, just as `"net.core.wmem_max"`.

see fdfdc5df21d3df985b751bc61929e2305882dd48
see https://github.com/quic-go/quic-go/issues/3923
---
 nixos/modules/services/web-servers/caddy/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/web-servers/caddy/default.nix b/nixos/modules/services/web-servers/caddy/default.nix
index 9a544e98cfc4..95dc219d108c 100644
--- a/nixos/modules/services/web-servers/caddy/default.nix
+++ b/nixos/modules/services/web-servers/caddy/default.nix
@@ -342,8 +342,9 @@ in
       }
     '';
 
-    # https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
+    # https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
     boot.kernel.sysctl."net.core.rmem_max" = mkDefault 2500000;
+    boot.kernel.sysctl."net.core.wmem_max" = mkDefault 2500000;
 
     systemd.packages = [ cfg.package ];
     systemd.services.caddy = {