From 6b3e83f4ca6ecfa7f3dbc755c59d33d199a2935b Mon Sep 17 00:00:00 2001
From: schizza <lukyn@lukyns.com>
Date: Sat, 27 Apr 2024 21:42:41 +0200
Subject: [PATCH] iptables script

In stations firmware 1.0 is bug for sending data to designated port.
This script will forward incoming connections on port 80 to 8123 for stations IP
---
 .../sws12500/iptables_redirect.sh             | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 custom_components/sws12500/iptables_redirect.sh

diff --git a/custom_components/sws12500/iptables_redirect.sh b/custom_components/sws12500/iptables_redirect.sh
new file mode 100755
index 0000000..ed34e25
--- /dev/null
+++ b/custom_components/sws12500/iptables_redirect.sh
@@ -0,0 +1,62 @@
+#!/bin/zsh
+
+# Script pro přesměrování portu pro stanici SWS12500
+
+STATION_IP = 192.168.2.95
+HA = 192.168.2.219
+SRC_PORT = 80
+DST_PORT = 8123
+
+INSTALL_IPTABLES = 0
+APK_MISSING = 0
+
+echo "Spoštím iptables pro 80 -> 8123 přesměrování"
+
+# Máme nainstalované iptables?
+
+echo -n "Kontrola zda jsou dostupné iptable ... "
+IPTABLES='$(type -p "iptables")'
+if ! [ -f "$IPTABLES" ]; then
+	echo "chybí"
+	INSTALL_IPTABLES = 1
+else
+	echo "OK"
+fi
+
+# Máme apk?
+echo -n "Kontrola zda je dostupný apk  ..."
+APK='$(type -p "apk")'
+if ! [ -f "$APK" ]; then
+	echo "chybí"
+	APK_MISSING = 1
+else
+	echo "OK"
+fi
+
+if [ APK_MISSING == 1 -a INSTALL_IPTABLES == 1 ]
+	echo "Nelze nakonfigurovat IP Tables. iptables chybí a chybí i instalační aplikace apk!!"
+	exit 1
+fi
+
+if [ INSTALL_IPTABLES == 1 -a APK_MISSING == 0]
+	runinstall=(apk add iptables)
+        echo -n "Spouštím instalaci iptables ... ${runinstall[@]} ... "
+        ${runinstall[@]}
+        EXIT_STATUS=$?
+	if [ $EXIT_STATUS -ne 0 ]
+                echo "Instalace iptables se nezdařila!"
+                exit $EXIT_STATUS
+	fi
+        runiptables=(iptables -t nat -I PREROUTING --src $STATION_IP --dst $HA -p tcp --dport $SRC_PORT -j REDIRECT --to-ports $DST_PORT)
+        echo -n "Spouštím iptables ... ${runiptables[@]} ..."
+        ${runiptables[@]}
+        EXIT_STATUS=$?
+        if [ $EXIT_STATUS -ne 0 ]
+                echo "Přidní pravidla do iptables se nezdařilo!"
+                exit $EXIT_STATUS
+	fi
+fi
+echo "iptables jsou nastaveny na přesměrování portu $SRC_PORT -> $DST_PORT pro stanici na IP: $STATION_IP"
+exit
+
+