From 610bf85460c1371aa2af035054b7f9d641132388 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Sun, 17 Oct 2021 20:58:27 +0200
Subject: yggdrasil-wg: ...

---
 modules/networkd/default.nix     | 1 +
 modules/networkd/systemd-lib.nix | 4 ++++
 2 files changed, 5 insertions(+)

(limited to 'modules/networkd')

diff --git a/modules/networkd/default.nix b/modules/networkd/default.nix
index 007f14c6..f78a9aee 100644
--- a/modules/networkd/default.nix
+++ b/modules/networkd/default.nix
@@ -96,6 +96,7 @@ let
           "MACAddress"
         ])
         (assertHasField "Name")
+        (assertMaxLength "Name" 15)
         (assertHasField "Kind")
         (assertValueOneOf "Kind" [
           "bond"
diff --git a/modules/networkd/systemd-lib.nix b/modules/networkd/systemd-lib.nix
index 2dbf1503..c5b5b7cb 100644
--- a/modules/networkd/systemd-lib.nix
+++ b/modules/networkd/systemd-lib.nix
@@ -90,6 +90,10 @@ in rec {
     optional (attr ? ${name} && !isInt attr.${name})
       "Systemd ${group} field `${name}' is not an integer";
 
+  assertMaxLength = name: max: group: attr:
+    optional (attr ? ${name} && stringLength attr.${name} > max)
+      "Systemd ${group} field `${name}' is too long (max of ${max})";
+
   checkUnitConfig = group: checks: attrs: let
     # We're applied at the top-level type (attrsOf unitOption), so the actual
     # unit options might contain attributes from mkOverride and mkIf that we need to
-- 
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