Installation script and tweaks in iptables script.

* added installation script

* iptables script translated to english and minor tweaks

install_iptables.sh

@@ -0,0 +1,148 @@
+#!/bin/bash
+
+# Installation script for iptables redirect
+
+RED_COLOR='\033[0;31m'
+GREEN_COLOR='\033[0;32m'
+GREEN_YELLOW='\033[1;33m'
+NO_COLOR='\033[0m'
+
+ST_PORT=80
+
+LINK=""
+
+P_HA=true
+P_ST=true
+
+declare -a HA_PATHS=(
+    "$PWD"
+    "$PWD/config"
+    "/config"
+    "/homeassistant"
+    "$HOME/.homeassistant"
+    "/usr/share/hassio/homeassistant"
+)
+
+function info() { echo -e $2 "${GREEN_COLOR}$1${NO_COLOR}"; }
+function warn() { echo -e $2 "${GREEN_YELLOW}$1${NO_COLOR}"; }
+function error() {
+    echo -e "${RED_COLOR}$1${NO_COLOR}"
+    if [ "$2" != "false" ]; then exit 1; fi
+}
+
+function check() {
+    echo -n "Checking dependencies: '$1' ... "
+    if [ -z "$(command -v "$1")" ]; then
+        error "not installed" $2
+        false
+    else
+        info "OK."
+        true
+    fi
+}
+
+function validate_ip() {
+
+    if [[ "$1" =~ ^(([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))\.){3}([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))$ ]]; then
+        true
+    else
+        false
+    fi
+}
+
+function validate_num() {
+    if [[ "$1" =~ ^[0-9]+$ ]]; then true; else false; fi
+}
+
+function validate_dest() {
+    echo "Validating host '$1' ... "
+    if ping -c 4; then
+        info "OK"
+        true
+    else
+        error "cannot reach" false
+        false
+    fi
+}
+
+function cont() {
+
+    while true; do
+        warn "$1"
+        warn "Do you want to continue? [y/N]: " -n
+        read -n 1 YN
+        YN=${YN:-N}
+        case $YN in
+        [Yy]) return 0 ;;
+        [Nn]) error "\nExiting." ;;
+        *) error "\nInvalid response.\n" false ;;
+        esac
+    done
+}
+
+echo
+echo "**************************************************************"
+echo "*                                                            *"
+echo -e "*        ${GREEN_YELLOW}Installation for iptables_redirect.sh ${NO_COLOR}              *"
+echo "*                                                            *"
+echo "**************************************************************"
+echo
+
+check "wget"
+check "sed"
+check "ping" false && { PING=true; } || { PING=false; }
+
+echo -n "Trying to find Home Assitant ... "
+for PATH in "${HA_PATHS[@]}"; do
+    if [ -n "$HA_PATH" ]; then
+        break
+    fi
+
+    if [ -f "$PATH/.HA_VERSION" ]; then
+        HA_PATH="$PATH"
+    fi
+done
+
+#[ -z $HA_PATH ] && { error "Home Assistant not found!"; }
+info "found at $HA_PATH"
+
+while true; do
+    read -r -p "Your station's IP: " ST_IP
+    if validate_ip $ST_IP; then break; fi
+    warn "Provide valid IP address."
+done
+
+while true; do
+    read -r -p "Home Assistant's IP: " HA_IP
+    if validate_ip $HA_IP; then break; fi
+    warn "Provide valid IP address."
+done
+
+while true; do
+    read -r -p "Home Assistant's port [8123]: " HA_PORT
+    HA_PORT=${HA_PORT:-8123}
+    if validate_num $HA_PORT && ((HA_PORT >= 1 && HA_PORT <= 65535)); then
+        break
+    fi
+    warn "Provide valid port number."
+done
+
+if $PING; then
+    validate_dest $HA_IP || { cont "Home Assistant host is unreachable."; P_HA=false; }
+    validate_dest $ST_IP || { cont "Station is unreachable."; P_ST=false; }
+fi
+
+info "\nYour configuration:"
+info "   Home Assistant at: $HA_PATH"
+info "   Home Assistant server at: $HA_IP:$HA_PORT" -n
+if $PING; then
+    if $P_HA; then info " (ping OK)"; else error " (unreachable)" false; fi
+else
+    error " (not tested)" false
+fi
+info "   Station at: ${ST_IP}:$ST_PORT" -n
+if $PING; then
+    if $P_ST; then info " (ping OK)"; else error " (unreachable)" false; fi
+else
+    error " (not tested)" false
+fi

iptables_redirect.sh

@@ -1,13 +1,18 @@
 #!/bin/bash
 
+# Script for frowarding SWS 12500 station's destination port 80
+# to your Home Assistant's instance port (8123)
+#
+# Workaround for station's firmware 1.0 bug
+#
+#
 # Script pro přesměrování portu pro stanici SWS12500
 
-# set -e
 
-STATION_IP=192.168.2.95
+STATION_IP=[_STATION_IP_]
-HA=192.168.2.219
+HA=[_HA_]
-SRC_PORT=80
+SRC_PORT=[_SRC_PORT_]
-DST_PORT=8123
+DST_PORT=[_DST_PORT_]
 
 INSTALL_IPTABLES=0
 APK_MISSING=0
@@ -23,9 +28,9 @@ function warn () { echo -e "${GREEN_YELLOW}WARN: $1${NO_COLOR}";}
 function error () { echo -e "${RED_COLOR}ERROR: $1${NO_COLOR}"; if [ "$2" != "false" ]; then exit 1;fi; }
 
 function check () {
-	echo -n "Kontrola dostupnosti $1 ... "
+	echo -n "Checking dependencies: '$1' ... "
 	if [ -z "$(command -v "$1")" ]; then
-		error "'$1' není nainstalován." $2
+		error "not installed" $2
 		return 1
 	fi
 	info "OK."
@@ -36,50 +41,49 @@ function check () {
 echo
 echo "**************************************************************"
 echo "*                                                            *"
-echo -e "*     ${GREEN_YELLOW}Spouštím iptables přesměrování pro port $SRC_PORT -> $DST_PORT ${NO_COLOR}    *"
+echo -e "*        ${GREEN_YELLOW}Running iptables forward for port $SRC_PORT -> $DST_PORT ${NO_COLOR}       *"
 echo "*                                                            *"
 echo "**************************************************************"
 echo
 
-# Máme nainstalované iptables a apk?
+# Check for dependencies
 
 check "iptables" false
 INSTALL_IPTABLES=$?
 
 check "apk" false
-
 APK_MISSING=$?
 
 
 if [ $APK_MISSING -eq 1 ] && [ $INSTALL_IPTABLES -eq 1 ]; then
-        error "Nelze nakonfigurovat IP Tables. \n'iptables' chybí a chybí i instalační aplikace 'apk'!!\n"
+        error "Could not install and run iptables.\n'apk' installer is missing and 'iptables' are not installed.\n"
 fi
 
 if [ $INSTALL_IPTABLES -eq 1 ] && [ $APK_MISSING -eq 0 ]; then
         declare -a RUNINSTALL=(apk add iptables)
-        echo -n "Spouštím instalaci iptables ... ${RUNINSTAll[@]} ... "
+        echo -n "Installing 'iptables' ... ${RUNINSTALL[@]} ... "
 		${RUNINSTALL[@]}
         EXIT_STATUS=$?
         if [ $EXIT_STATUS -ne 0 ]; then
-				warn "Chybový kód instalace: $EXIT_STATUS"
+				warn "apk error code: $EXIT_STATUS"
-                error "Instalace iptables se nezdařila!"
+                error "Installation of iptables failed!"
         else
-            info "'iptables' úspěšně nainstalovány."
+            info "'iptables' installed successfully."
         fi
 fi
 declare -a RULE=(PREROUTING -t nat -s $STATION_IP -d $HA -p tcp -m tcp --dport $SRC_PORT -j REDIRECT --to-ports $DST_PORT)
-echo -ne "Spouštím iptables ... "
+echo -n "Chceking for existing rule in iptables ... "
 $(iptables -C ${RULE[@]} 2>/dev/null)
 if [ $? -eq 0 ]; then
-    warn "Pravidlo je již v iptables zapsáno."
+    warn "Rule is already present in PREROUTING chain."
 else
+    echo -n "Inserting iptables rule to PREROUTING chain ... "
     $(iptables -I ${RULE[@]})
 fi
 EXIT_STATUS=$?
 if [ $EXIT_STATUS -ne 0 ]; then
-	warn "Chybový kód iptables: ${EXIT_STATUS} "
+	warn "iptables error code: ${EXIT_STATUS} "
-	error "Přidání pravidla do iptables se nezdařilo!"
+	error "Rule could not be added!"
 fi
 
-info "iptables jsou nastaveny na přesměrování portu $SRC_PORT -> $DST_PORT pro stanici na IP: $STATION_IP"
+info "iptables are set to forward port $SRC_PORT -> $DST_PORT for station's IP: $STATION_IP"
-