From 444308d6a5e3cefe1804cddeafae387899a81eae Mon Sep 17 00:00:00 2001
From: Wojciech Kozlowski <wk@wojciechkozlowski.eu>
Date: Thu, 20 Jul 2023 20:50:42 +0200
Subject: [PATCH] Make wireguard mtu configurable

---
 vpn/wireguard/defaults/main.yml       | 3 +++
 vpn/wireguard/meta/argument_specs.yml | 3 +++
 vpn/wireguard/templates/IFACE         | 2 +-
 3 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 vpn/wireguard/defaults/main.yml

diff --git a/vpn/wireguard/defaults/main.yml b/vpn/wireguard/defaults/main.yml
new file mode 100644
index 0000000..696603f
--- /dev/null
+++ b/vpn/wireguard/defaults/main.yml
@@ -0,0 +1,3 @@
+---
+vpn_wireguard_iface: "wg0"
+vpn_wireguard_mtu: 1420
diff --git a/vpn/wireguard/meta/argument_specs.yml b/vpn/wireguard/meta/argument_specs.yml
index e4f919a..b821dd1 100644
--- a/vpn/wireguard/meta/argument_specs.yml
+++ b/vpn/wireguard/meta/argument_specs.yml
@@ -9,6 +9,9 @@ argument_specs:
       vpn_wireguard_iface:
         type: "str"
         required: true
+      vpn_wireguard_mtu:
+        type: "int"
+        required: true
       vpn_wireguard_role:
         type: "str"
         required: true
diff --git a/vpn/wireguard/templates/IFACE b/vpn/wireguard/templates/IFACE
index 9d41c96..8a9a75f 100644
--- a/vpn/wireguard/templates/IFACE
+++ b/vpn/wireguard/templates/IFACE
@@ -2,7 +2,7 @@ auto {{ vpn_wireguard_iface }}
 iface {{ vpn_wireguard_iface }} inet static
     pre-up /usr/local/sbin/ip-link-add.sh $IFACE type wireguard
     pre-up wg setconf $IFACE /etc/wireguard/$IFACE.conf
-    pre-up ip link set mtu 1420 dev $IFACE
+    pre-up ip link set mtu {{ vpn_wireguard_mtu }} dev $IFACE
 
     post-up /usr/local/sbin/post-up-$IFACE-inet.nft
     post-up /usr/local/sbin/post-up-$IFACE-ipv4.nft