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#!/bin/bash
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################################################################################
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# #
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# Author: Michal Kliment #
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# Description: This script generates config file of ISC DHCP server #
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# from FreenetIS #
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# #
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# Version: 0.1.3 #
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# #
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################################################################################
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# Version
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VERSION="0.1.3"
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# Variables
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CONFIG=/etc/freenetis/freenetis-dhcp.conf
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CUSTOM_DHCP_CONF=/etc/dhcp/dhcp.conf.custom
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FORCED=1
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# Vesion info? Only possible arg.
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if [ $# -eq 1 ]; then
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if [ "$1" == "version" ]; then
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echo "$VERSION"
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exit 0
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fi
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fi
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# Load variables
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if [ -e $CONFIG ]; then
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. $CONFIG || true
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else
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echo "`date -R` Config file is missing at path $CONFIG. Terminating..."
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exit 0
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fi
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# check config
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if [[ ! "$DEVICE_ID" =~ ^[0-9]+$ ]] || [ $DEVICE_ID -lt 1 ]; then
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echo "[ERROR] `date -R` Wrong configuration (ID not set properly)"
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exit 1
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fi
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if [[ ! "$TIMEOUT" =~ ^[0-9]+$ ]] || [ $TIMEOUT -lt 1 ]; then
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echo "[ERROR] `date -R` Wrong configuration (TIMEOUT not set properly)"
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exit 1
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fi
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# endless loop
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while true;
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do
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#path
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if [ "$FORCED" = 1 ]; then # forced download (#474)
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DOWN_PATH="$FULL_PATH/1"
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FORCED=0
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else
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DOWN_PATH="$FULL_PATH"
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fi
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# download
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TMPFILE=`mktemp`
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echo "[INFO] `date -R` Downloading ISC DHCP SERVER config from (${PATH_FN})"
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status=`curl -s -o "$TMPFILE" -w "%{http_code}" "$DOWN_PATH"`
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# make sure that config exist
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touch "$DHCP_CONF"
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# check download
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if [ "$status" = "200" ]; then
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# attach custom conf if exists
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if [ -r "$CUSTOM_DHCP_CONF" ]; then
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cat "$CUSTOM_DHCP_CONF" >> "$TMPFILE"
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fi
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# config has been change
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if [ `diff "$TMPFILE" "$DHCP_CONF" | wc -l` -gt 0 ]; then
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echo "[INFO] `date -R` Downloaded (code: $status)"
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echo "[INFO] `date -R` Backuping old config to $DHCP_CONF.save"
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mv -f "$DHCP_CONF" "$DHCP_CONF".save
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echo "[INFO] `date -R` Loading new config to $DHCP_CONF.save..."
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# copy config
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mv -f "$TMPFILE" "$DHCP_CONF"
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#restart DHCP server
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echo "[INFO] `date -R` Restarting ISC DHCP server"
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service isc-dhcp-server restart 2>&1 >/dev/null
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else
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echo "[INFO] `date -R` No change -> keeping old configuration"
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fi
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elif [[ "$status" =~ ^30[0-9] ]]; then
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echo "[INFO] `date -R` DHCP configuration not changed"
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elif [ "$status" = "404" ]; then
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echo "[ERROR] `date -R` Download failed (code: $status). Wrong path to FreenetIS or device $DEVICE_ID not exists."
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elif [ "$status" = "403" ]; then
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echo "[ERROR] `date -R` Download failed (code: $status). Device $DEVICE_ID not configured properly."
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else
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echo "[ERROR] `date -R` Download failed (code: $status)"
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fi
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rm -f "$TMPFILE"
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sleep $TIMEOUT
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done
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