openvpn3: fix unused result from proto ParseString (#502078)

From ee192f35d29ecae64dc00b4736e1870274b58cc8 Mon Sep 17 00:00:00 2001

From: azban <me@azban.net>

Date: Sat, 21 Mar 2026 18:41:34 -0600

Subject: [PATCH] handle result from DcoKeyConfig_ParseFromString

This previously failed with error unused-result. This checks the result and throws an exception if the parsing fails.

---

 src/netcfg/netcfg-dco.cpp | 4 +++-

 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/netcfg/netcfg-dco.cpp b/src/netcfg/netcfg-dco.cpp

index 290c12a8..f41836bf 100644

--- a/src/netcfg/netcfg-dco.cpp

+++ b/src/netcfg/netcfg-dco.cpp

@@ -265,7 +265,9 @@ void NetCfgDCO::method_new_key(GVariant *params)

     std::string key_config = glib2::Value::Extract<std::string>(params, 1);

     DcoKeyConfig dco_kc;

-    dco_kc.ParseFromString(base64->decode(key_config));

+    if (!dco_kc.ParseFromString(base64->decode(key_config))) {

+        throw NetCfgException("Failed to parse DCO key config");

+    }

     auto copyKeyDirection = [](const DcoKeyConfig_KeyDirection &src, KoRekey::KeyDirection &dst)

     {

-- 

2.51.2

  patches = [

    # Should be fixed in v26: https://codeberg.org/OpenVPN/openvpn3-linux/issues/70

    ./v25-latest-linux-fix.patch

    ./0001-handle-result-from-DcoKeyConfig_ParseFromString.patch

  ];

  postPatch = ''