From aa08b09068dd73832b6f119e0a133ad21905bafa Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Sun, 13 Oct 2019 22:16:45 +0200
Subject: [PATCH] miniupnpd version prints backend

---
 miniupnpd/miniupnpd.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/miniupnpd/miniupnpd.c b/miniupnpd/miniupnpd.c
index 84f15d2..c4a8602 100644
--- a/miniupnpd/miniupnpd.c
+++ b/miniupnpd/miniupnpd.c
@@ -2002,6 +2002,21 @@ main(int argc, char * * argv)
 			     " " MINIUPNPD_GIT_REF
 #endif
 			     " " __DATE__ );
+#ifdef USE_PF
+			puts("using pf backend");
+#endif
+#ifdef USE_IPF
+			puts("using ipf backend");
+#endif
+#ifdef USE_IPFW
+			puts("using ipfw backend");
+#endif
+#ifdef USE_IPTABLES
+			puts("using netfilter(iptables) backend");
+#endif
+#ifdef USE_NFTABLES
+			puts("using netfilter(nftables) backend");
+#endif
 #ifdef ENABLE_HTTPS
 #ifdef OPENSSL_VERSION
 			puts(OpenSSL_version(OPENSSL_VERSION));