From 83a5389242446daca019a59cc05d2e4e045ab8ad Mon Sep 17 00:00:00 2001
From: amorfo77 <vicente@arinmedia.es>
Date: Fri, 10 Feb 2023 18:18:27 +0100
Subject: [PATCH] added entrypoint script

---
 data/Dockerfiles/netfilter/netfilter.sh | 29 +++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 data/Dockerfiles/netfilter/netfilter.sh

diff --git a/data/Dockerfiles/netfilter/netfilter.sh b/data/Dockerfiles/netfilter/netfilter.sh
new file mode 100644
index 00000000..c45d21c8
--- /dev/null
+++ b/data/Dockerfiles/netfilter/netfilter.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+backend=iptables
+
+nft list table ip filter &>/dev/null
+nftables_found=$?
+
+iptables -L &>/dev/null
+iptables_found=$?
+
+if [ $nftables_found -lt $iptables_found ]; then
+  backend=nftables
+fi
+
+if [ $nftables_found -gt $iptables_found ]; then
+  backend=iptables
+fi
+
+if [ $nftables_found -eq 0 ] && [ $nftables_found -eq $iptables_found ]; then
+  nftables_lines=$(nft list ruleset | wc -l)
+  iptables_lines=$(iptables-save | wc -l)
+  if [ $nftables_lines -gt $iptables_lines ]; then
+    backend=nftables
+  else
+    backend=iptables
+  fi
+fi
+
+exec python -u server.py $backend