From 42e99ad77396e4e9b02d67daf46349e215e99a0f Mon Sep 17 00:00:00 2001
From: willcl-ark <will@256k1.dev>
Date: Wed, 2 Apr 2025 09:47:27 +0100
Subject: [PATCH] net: skip non-route netlink responses

This shouldn't usually be hit, but is a good belt-and-braces.
---
 src/common/netif.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/common/netif.cpp b/src/common/netif.cpp
index dbdd3ddde97..ef0485b8a2d 100644
--- a/src/common/netif.cpp
+++ b/src/common/netif.cpp
@@ -97,6 +97,10 @@ std::optional<CNetAddr> QueryDefaultGatewayImpl(sa_family_t family)
         rtmsg* r = (rtmsg*)NLMSG_DATA(hdr);
         int remaining_len = RTM_PAYLOAD(hdr);
 
+        if (hdr->nlmsg_type != RTM_NEWROUTE) {
+            continue; // Skip non-route messages
+        }
+
         // Only consider default routes (destination prefix length of 0).
         if (r->rtm_dst_len != 0) {
             continue;