BSD: warn if kernel does not support route(4) filtering

diff --git a/src/if-bsd.c b/src/if-bsd.c
index b87cf33707f5351aaa26bfa32554c0384c93dbe4..f4d849822d9dc0a17f88c8cbf8cde6ecf36043bc 100644 (file)
--- a/src/if-bsd.c
+++ b/src/if-bsd.c
@@ -191,6 +191,8 @@ if_opensockets_os(struct dhcpcd_ctx *ctx)
        if (setsockopt(ctx->link_fd, PF_ROUTE, ROUTE_MSGFILTER,
            &msgfilter_mask, sizeof(msgfilter_mask)) == -1)
                logerr(__func__);
+#else
+#warn kernel does not support route message filtering
 #endif
 
        return 0;