From 43bc14032d39a06f04d302977aa72558ee5a91e6 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Mon, 6 Mar 2023 10:53:12 +0100
Subject: vidhar: cake

---
 hosts/vidhar/network/dsl.nix | 45 +++++++++++++++++++++++++++++++++++++-------
 1 file changed, 38 insertions(+), 7 deletions(-)

diff --git a/hosts/vidhar/network/dsl.nix b/hosts/vidhar/network/dsl.nix
index 5b7c5ac7..7a1dab58 100644
--- a/hosts/vidhar/network/dsl.nix
+++ b/hosts/vidhar/network/dsl.nix
@@ -59,13 +59,44 @@ in {
     };
 
     environment.etc = {
-      "ppp/ip-up" = {
-        text = ''
-          #!${pkgs.runtimeShell}
-          ${pkgs.iproute2}/bin/ip route add default via "$5" dev "${pppInterface}" metric 512
-        '';
-        mode = "0555";
-      };
+      "ppp/ip-pre-up".source = let
+        app = pkgs.writeShellApplication {
+          name = "ip-pre-up";
+          runtimeInputs = with pkgs; [ iproute2 ethtool ];
+          text = ''
+            ethtool -K telekom tso off gso off gro off
+
+            tc qdisc replace dev "${pppInterface}" root cake pppoe-ptm nat bandwidth 35mbit
+
+            modprobe ifb
+            ip link del "ifb4${pppInterface}" || true
+            ip link add name "ifb4${pppInterface}" type ifb
+            tc qdisc del dev "${pppInterface}" ingress || true
+            tc qdisc add dev "${pppInterface}" handle ffff: ingress
+            tc qdisc replace dev "ifb4${pppInterface}" root cake pppoe-ptm bandwidth 93mbit
+            ip link set "ifb4${pppInterface}" up
+            tc filter add dev "${pppInterface}" parent ffff: matchall action mirred egress redirect dev "ifb4${pppInterface}"
+          '';
+        };
+      in "${app}/bin/${app.meta.mainProgram}";
+      "ppp/ip-up".source = let
+        app = pkgs.writeShellApplication {
+          name = "ip-up";
+          runtimeInputs = with pkgs; [ iproute2 ];
+          text = ''
+            ip route add default via "$5" dev "${pppInterface}" metric 512
+          '';
+        };
+      in "${app}/bin/${app.meta.mainProgram}";
+      "ppp/ip-down".source = let
+        app = pkgs.writeShellApplication {
+          name = "ip-down";
+          runtimeInputs = with pkgs; [ iproute2 ];
+          text = ''
+            ip link del "ifb4${pppInterface}"
+          '';
+        };
+      in "${app}/bin/${app.meta.mainProgram}";
     };
 
     systemd.network.networks.${pppInterface} = {
-- 
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