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1001 lines
34 KiB
1001 lines
34 KiB
#!/bin/sh
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# /usr/lib/ddns/dynamic_dns_functions.sh
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#
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# Original written by Eric Paul Bishop, January 2008
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# Distributed under the terms of the GNU General Public License (GPL) version 2.0
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# (Loosely) based on the script on the one posted by exobyte in the forums here:
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# http://forum.openwrt.org/viewtopic.php?id=14040
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#
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# extended and partial rewritten in August 2014
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# by Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
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# to support:
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# - IPv6 DDNS services
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# - setting DNS Server to retrieve current IP including TCP transport
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# - Proxy Server to send out updates or retrieving WEB based IP detection
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# - force_interval=0 to run once (usefull for cron jobs etc.)
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# - the usage of BIND's host instead of BusyBox's nslookup if installed (DNS via TCP)
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# - extended Verbose Mode and log file support for better error detection
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#
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# function timeout
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# copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
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# @author Anthony Thyssen 6 April 2011
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#
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# variables in small chars are read from /etc/config/ddns
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# variables in big chars are defined inside these scripts as global vars
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# variables in big chars beginning with "__" are local defined inside functions only
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#set -vx #script debugger
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. /lib/functions.sh
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. /lib/functions/network.sh
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# GLOBAL VARIABLES #
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SECTION_ID="" # hold config's section name
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VERBOSE_MODE=1 # default mode is log to console, but easily changed with parameter
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# directory to store run information to.
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RUNDIR=$(uci -q get ddns.global.run_dir) || RUNDIR="/var/run/ddns"
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[ -d $RUNDIR ] || mkdir -p -m755 $RUNDIR
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# NEW # directory to store log files
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LOGDIR=$(uci -q get ddns.global.log_dir) || LOGDIR="/var/log/ddns"
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[ -d $LOGDIR ] || mkdir -p -m755 $LOGDIR
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LOGFILE="" # NEW # logfile can be enabled as new option
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PIDFILE="" # pid file
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UPDFILE="" # store UPTIME of last update
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DATFILE="" # save stdout data of WGet and other extern programs called
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ERRFILE="" # save stderr output of WGet and other extern programs called
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# number of lines to before rotate logfile
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LOGLINES=$(uci -q get ddns.global.log_lines) || LOGLINES=250
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LOGLINES=$((LOGLINES + 1)) # correct sed handling
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CHECK_SECONDS=0 # calculated seconds out of given
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FORCE_SECONDS=0 # interval and unit
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RETRY_SECONDS=0 # in configuration
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LAST_TIME=0 # holds the uptime of last successful update
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CURR_TIME=0 # holds the current uptime
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NEXT_TIME=0 # calculated time for next FORCED update
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EPOCH_TIME=0 # seconds since 1.1.1970 00:00:00
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REGISTERED_IP="" # holds the IP read from DNS
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LOCAL_IP="" # holds the local IP read from the box
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URL_USER="" # url encoded $username from config file
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URL_PASS="" # url encoded $password from config file
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ERR_LAST=0 # used to save $? return code of program and function calls
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ERR_UPDATE=0 # error counter on different local and registered ip
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PID_SLEEP=0 # ProcessID of current background "sleep"
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# format to show date information in log and luci-app-ddns default ISO 8601 format
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DATE_FORMAT=$(uci -q get ddns.global.date_format) || DATE_FORMAT="%F %R"
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DATE_PROG="date +'$DATE_FORMAT'"
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# regular expression to detect IPv4 / IPv6
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# IPv4 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x
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IPV4_REGEX="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
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# IPv6 ( ( 0-9a-f 1-4char ":") min 1x) ( ( 0-9a-f 1-4char )optional) ( (":" 0-9a-f 1-4char ) min 1x)
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IPV6_REGEX="\(\([0-9A-Fa-f]\{1,4\}:\)\{1,\}\)\(\([0-9A-Fa-f]\{1,4\}\)\{0,1\}\)\(\(:[0-9A-Fa-f]\{1,4\}\)\{1,\}\)"
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# detect if called by dynamic_dns_lucihelper.sh script, disable retrys (empty variable == false)
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[ "$(basename $0)" = "dynamic_dns_lucihelper.sh" ] && LUCI_HELPER="TRUE" || LUCI_HELPER=""
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# loads all options for a given package and section
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# also, sets all_option_variables to a list of the variable names
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# $1 = ddns, $2 = SECTION_ID
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load_all_config_options()
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{
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local __PKGNAME="$1"
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local __SECTIONID="$2"
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local __VAR
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local __ALL_OPTION_VARIABLES=""
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# this callback loads all the variables in the __SECTIONID section when we do
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# config_load. We need to redefine the option_cb for different sections
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# so that the active one isn't still active after we're done with it. For reference
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# the $1 variable is the name of the option and $2 is the name of the section
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config_cb()
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{
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if [ ."$2" = ."$__SECTIONID" ]; then
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option_cb()
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{
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__ALL_OPTION_VARIABLES="$__ALL_OPTION_VARIABLES $1"
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}
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else
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option_cb() { return 0; }
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fi
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}
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config_load "$__PKGNAME"
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# Given SECTION_ID not found so no data, so return 1
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[ -z "$__ALL_OPTION_VARIABLES" ] && return 1
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for __VAR in $__ALL_OPTION_VARIABLES
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do
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config_get "$__VAR" "$__SECTIONID" "$__VAR"
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done
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return 0
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}
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# read's all service sections from ddns config
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# $1 = Name of variable to store
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load_all_service_sections() {
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local __DATA=""
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config_cb()
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{
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# only look for section type "service", ignore everything else
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[ "$1" = "service" ] && __DATA="$__DATA $2"
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}
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config_load "ddns"
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eval "$1=\"$__DATA\""
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return
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}
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# starts updater script for all given sections or only for the one given
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# $1 = interface (Optional: when given only scripts are started
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# configured for that interface)
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# used by /etc/hotplug.d/iface/25-ddns on IFUP
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# and by /etc/init.d/ddns start
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start_daemon_for_all_ddns_sections()
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{
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local __EVENTIF="$1"
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local __SECTIONS=""
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local __SECTIONID=""
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local __IFACE=""
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load_all_service_sections __SECTIONS
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for __SECTIONID in $__SECTIONS; do
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config_get __IFACE "$__SECTIONID" interface "wan"
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[ -z "$__EVENTIF" -o "$__IFACE" = "$__EVENTIF" ] || continue
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/usr/lib/ddns/dynamic_dns_updater.sh $__SECTIONID 0 >/dev/null 2>&1 &
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done
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}
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# stop sections process incl. childs (sleeps)
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# $1 = section
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stop_section_processes() {
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local __PID=0
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local __PIDFILE="$RUNDIR/$1.pid"
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[ $# -ne 1 ] && write_log 12 "Error calling 'stop_section_processes()' - wrong number of parameters"
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[ -e "$__PIDFILE" ] && {
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__PID=$(cat $__PIDFILE)
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ps | grep "^[\t ]*$__PID" >/dev/null 2>&1 && kill $__PID || __PID=0 # terminate it
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}
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[ $__PID -eq 0 ] # report if process was running
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}
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# stop updater script for all defines sections or only for one given
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# $1 = interface (optional)
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# used by /etc/hotplug.d/iface/25-ddns on 'ifdown'
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# and by /etc/init.d/ddns stop
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# needed because we also need to kill "sleep" child processes
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stop_daemon_for_all_ddns_sections() {
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local __EVENTIF="$1"
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local __SECTIONS=""
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local __SECTIONID=""
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local __IFACE=""
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load_all_service_sections __SECTIONS
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for __SECTIONID in $__SECTIONS; do
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config_get __IFACE "$__SECTIONID" interface "wan"
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[ -z "$__EVENTIF" -o "$__IFACE" = "$__EVENTIF" ] || continue
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stop_section_processes "$__SECTIONID"
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done
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}
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# reports to console, logfile, syslog
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# $1 loglevel 7 == Debug to 0 == EMERG
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# value +10 will exit the scripts
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# $2..n text to report
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write_log() {
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local __LEVEL __EXIT __CMD __MSG
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local __TIME=$(date +%H%M%S)
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[ $1 -ge 10 ] && {
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__LEVEL=$(($1-10))
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__EXIT=1
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} || {
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__LEVEL=$1
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__EXIT=0
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}
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shift # remove loglevel
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[ $__EXIT -eq 0 ] && __MSG="$*" || __MSG="$* - TERMINATE"
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case $__LEVEL in # create log message and command depending on loglevel
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0) __CMD="logger -p user.emerg -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME EMERG : $__MSG" ;;
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1) __CMD="logger -p user.alert -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME ALERT : $__MSG" ;;
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2) __CMD="logger -p user.crit -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME CRIT : $__MSG" ;;
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3) __CMD="logger -p user.err -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME ERROR : $__MSG" ;;
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4) __CMD="logger -p user.warn -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME WARN : $__MSG" ;;
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5) __CMD="logger -p user.notice -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME note : $__MSG" ;;
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6) __CMD="logger -p user.info -t ddns-scripts[$$] $SECTION_ID: $__MSG"
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__MSG=" $__TIME info : $__MSG" ;;
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7) __MSG=" $__TIME : $__MSG";;
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*) return;;
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esac
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# verbose echo
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[ $VERBOSE_MODE -gt 0 -o $__EXIT -gt 0 ] && echo -e "$__MSG"
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# write to logfile
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if [ ${use_logfile:-1} -eq 1 -o $VERBOSE_MODE -gt 1 ]; then
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echo -e "$__MSG" >> $LOGFILE
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# VERBOSE_MODE > 1 then NO loop so NO truncate log to $LOGLINES lines
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[ $VERBOSE_MODE -gt 1 ] || sed -i -e :a -e '$q;N;'$LOGLINES',$D;ba' $LOGFILE
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fi
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[ $LUCI_HELPER ] && return # nothing else todo when running LuCI helper script
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[ $__LEVEL -eq 7 ] && return # no syslog for debug messages
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[ $__EXIT -eq 1 ] && {
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$__CMD # force syslog before exit
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exit 1
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}
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[ $use_syslog -eq 0 ] && return
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[ $((use_syslog + __LEVEL)) -le 7 ] && $__CMD
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return
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}
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# replace all special chars to their %hex value
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# used for USERNAME and PASSWORD in update_url
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# unchanged: "-"(minus) "_"(underscore) "."(dot) "~"(tilde)
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# to verify: "'"(single quote) '"'(double quote) # because shell delimiter
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# "$"(Dollar) # because used as variable output
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# tested with the following string stored via Luci Application as password / username
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# A B!"#AA$1BB%&'()*+,-./:;<=>?@[\]^_`{|}~ without problems at Dollar or quotes
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urlencode() {
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# $1 Name of Variable to store encoded string to
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# $2 string to encode
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local __STR __LEN __CHAR __OUT
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local __ENC=""
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local __POS=1
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[ $# -ne 2 ] && write_log 12 "Error calling 'urlencode()' - wrong number of parameters"
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__STR="$2" # read string to encode
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__LEN=${#__STR} # get string length
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while [ $__POS -le $__LEN ]; do
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# read one chat of the string
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__CHAR=$(expr substr "$__STR" $__POS 1)
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case "$__CHAR" in
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[-_.~a-zA-Z0-9] )
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# standard char
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__OUT="${__CHAR}"
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;;
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* )
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# special char get %hex code
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__OUT=$(printf '%%%02x' "'$__CHAR" )
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;;
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esac
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__ENC="${__ENC}${__OUT}" # append to encoded string
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__POS=$(( $__POS + 1 )) # increment position
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done
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eval "$1=\"$__ENC\"" # transfer back to variable
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return 0
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}
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# extract url or script for given DDNS Provider from
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# file /usr/lib/ddns/services for IPv4 or from
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# file /usr/lib/ddns/services_ipv6 for IPv6
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# $1 Name of Variable to store url to
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# $2 Name of Variable to store script to
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get_service_data() {
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local __LINE __FILE __NAME __URL __SERVICES __DATA
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local __SCRIPT=""
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local __OLD_IFS=$IFS
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local __NEWLINE_IFS='
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' #__NEWLINE_IFS
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[ $# -ne 2 ] && write_log 12 "Error calling 'get_service_data()' - wrong number of parameters"
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__FILE="/usr/lib/ddns/services" # IPv4
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[ $use_ipv6 -ne 0 ] && __FILE="/usr/lib/ddns/services_ipv6" # IPv6
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#remove any lines not containing data, and then make sure fields are enclosed in double quotes
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__SERVICES=$(cat $__FILE | grep "^[\t ]*[^#]" | \
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awk ' gsub("\x27", "\"") { if ($1~/^[^\"]*$/) $1="\""$1"\"" }; { if ( $NF~/^[^\"]*$/) $NF="\""$NF"\"" }; { print $0 }')
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IFS=$__NEWLINE_IFS
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for __LINE in $__SERVICES; do
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#grep out proper parts of data and use echo to remove quotes
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__NAME=$(echo $__LINE | grep -o "^[\t ]*\"[^\"]*\"" | xargs -r -n1 echo)
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__DATA=$(echo $__LINE | grep -o "\"[^\"]*\"[\t ]*$" | xargs -r -n1 echo)
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if [ "$__NAME" = "$service_name" ]; then
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break # found so leave for loop
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fi
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done
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IFS=$__OLD_IFS
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# check is URL or SCRIPT is given
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__URL=$(echo "$__DATA" | grep "^http:")
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[ -z "$__URL" ] && __SCRIPT="/usr/lib/ddns/$__DATA"
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eval "$1=\"$__URL\""
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eval "$2=\"$__SCRIPT\""
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return 0
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}
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# Calculate seconds from interval and unit
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# $1 Name of Variable to store result in
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# $2 Number and
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# $3 Unit of time interval
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get_seconds() {
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[ $# -ne 3 ] && write_log 12 "Error calling 'get_seconds()' - wrong number of parameters"
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case "$3" in
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"days" ) eval "$1=$(( $2 * 86400 ))";;
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"hours" ) eval "$1=$(( $2 * 3600 ))";;
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"minutes" ) eval "$1=$(( $2 * 60 ))";;
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* ) eval "$1=$2";;
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esac
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return 0
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}
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timeout() {
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# copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
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# only did the folloing changes
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# - commented out "#!/bin/bash" and usage section
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# - replace exit by return for usage as function
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# - some reformating
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#
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# timeout [-SIG] time [--] command args...
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#
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# Run the given command until completion, but kill it if it runs too long.
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# Specifically designed to exit immediatally (no sleep interval) and clean up
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# nicely without messages or leaving any extra processes when finished.
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#
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# Example use
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# timeout 5 countdown
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#
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###
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#
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# Based on notes in my "Shell Script Hints", section "Command Timeout"
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# http://www.ict.griffith.edu.au/~anthony/info/shell/script.hints
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#
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# This script uses a lot of tricks to terminate both the background command,
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# the timeout script, and even the sleep process. It also includes trap
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# commands to prevent sub-shells reporting expected "Termination Errors".
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#
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# It took years of occasional trials, errors and testing to get a pure bash
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# timeout command working as well as this does.
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#
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###
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#
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# Anthony Thyssen 6 April 2011
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#
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# PROGNAME=$(type $0 | awk '{print $3}') # search for executable on path
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# PROGDIR=$(dirname $PROGNAME) # extract directory of program
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# PROGNAME=$(basename $PROGNAME) # base name of program
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# output the script comments as docs
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# Usage() {
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# echo >&2 "$PROGNAME:" "$@"
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# sed >&2 -n '/^###/q; /^#/!q; s/^#//; s/^ //; 3s/^/Usage: /; 2,$ p' "$PROGDIR/$PROGNAME"
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# exit 10;
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# }
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SIG=-TERM
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while [ $# -gt 0 ]; do
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case "$1" in
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--)
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# forced end of user options
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shift;
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break ;;
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# -\?|--help|--doc*)
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# Usage ;;
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[0-9]*)
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TIMEOUT="$1" ;;
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-*)
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SIG="$1" ;;
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*)
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# unforced end of user options
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break ;;
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esac
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shift # next option
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done
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# run main command in backgrouds and get its pid
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"$@" &
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command_pid=$!
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# timeout sub-process abort countdown after ABORT seconds! also backgrounded
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sleep_pid=0
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(
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# cleanup sleep process
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trap 'kill -TERM $sleep_pid; return 1' 1 2 3 15
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# sleep timeout period in background
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sleep $TIMEOUT &
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sleep_pid=$!
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wait $sleep_pid
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# Abort the command
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kill $SIG $command_pid >/dev/null 2>&1
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return 1
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) &
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timeout_pid=$!
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# Wait for main command to finished or be timed out
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wait $command_pid
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status=$?
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# Clean up timeout sub-shell - if it is still running!
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kill $timeout_pid 2>/dev/null
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wait $timeout_pid 2>/dev/null
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# Uncomment to check if a LONG sleep still running (no sleep should be)
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# sleep 1
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# echo "-----------"
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# /bin/ps j # uncomment to show if abort "sleep" is still sleeping
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return $status
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}
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#verify given host and port is connectable
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# $1 Host/IP to verify
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# $2 Port to verify
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verify_host_port() {
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local __HOST=$1
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local __PORT=$2
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local __IP __IPV4 __IPV6 __RUNPROG __ERR
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# return codes
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# 1 system specific error
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# 2 nslookup error
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# 3 nc (netcat) error
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# 4 unmatched IP version
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[ $# -ne 2 ] && write_log 12 "Error calling 'verify_host_port()' - wrong number of parameters"
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__RUNPROG="/usr/bin/nslookup $__HOST >$DATFILE 2>$ERRFILE"
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write_log 7 "#> $__RUNPROG"
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eval $__RUNPROG
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__ERR=$?
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# command error
|
|
[ $__ERR -gt 0 ] && {
|
|
write_log 3 "DNS Resolver Error - BusyBox nslookup Error '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)"
|
|
return 2
|
|
}
|
|
# extract IP address
|
|
__IPV4=$(cat $DATFILE | sed -ne "3,\$ { s/^Address [0-9]*: \($IPV4_REGEX\).*$/\\1/p }")
|
|
__IPV6=$(cat $DATFILE | sed -ne "3,\$ { s/^Address [0-9]*: \($IPV6_REGEX\).*$/\\1/p }")
|
|
|
|
# check IP version if forced
|
|
if [ $force_ipversion -ne 0 ]; then
|
|
__ERR=0
|
|
[ $use_ipv6 -eq 0 -a -z "$__IPV4" ] && __ERR=4
|
|
[ $use_ipv6 -eq 1 -a -z "$__IPV6" ] && __ERR=6
|
|
[ $__ERR -gt 0 ] && {
|
|
[ $LUCI_HELPER ] && return 4
|
|
write_log 14 "Verify host Error '4' - Forced IP Version IPv$__ERR don't match"
|
|
}
|
|
fi
|
|
|
|
# verify nc command
|
|
# busybox nc compiled without -l option "NO OPT l!" -> critical error
|
|
/usr/bin/nc --help 2>&1 | grep -i "NO OPT l!" >/dev/null 2>&1 && \
|
|
write_log 12 "Busybox nc (netcat) compiled without '-l' option, error 'NO OPT l!'"
|
|
# busybox nc compiled with extensions
|
|
/usr/bin/nc --help 2>&1 | grep "\-w" >/dev/null 2>&1 && __NCEXT="TRUE"
|
|
|
|
# connectivity test
|
|
# run busybox nc to HOST PORT
|
|
# busybox might be compiled with "FEATURE_PREFER_IPV4_ADDRESS=n"
|
|
# then nc will try to connect via IPv6 if there is any IPv6 availible on any host interface
|
|
# not worring, if there is an IPv6 wan address
|
|
# so if not "force_ipversion" to use_ipv6 then connect test via ipv4, if availible
|
|
[ $force_ipversion -ne 0 -a $use_ipv6 -ne 0 -o -z "$__IPV4" ] && __IP=$__IPV6 || __IP=$__IPV4
|
|
|
|
if [ -n "$__NCEXT" ]; then # BusyBox nc compiled with extensions (timeout support)
|
|
__RUNPROG="/usr/bin/nc -vw 1 $__IP $__PORT </dev/null >$DATFILE 2>$ERRFILE"
|
|
write_log 7 "#> $__RUNPROG"
|
|
eval $__RUNPROG
|
|
__ERR=$?
|
|
[ $__ERR -eq 0 ] && return 0
|
|
write_log 3 "Connect error - BusyBox nc (netcat) Error '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)"
|
|
return 3
|
|
else # nc compiled without extensions (no timeout support)
|
|
__RUNPROG="timeout 2 -- /usr/bin/nc $__IP $__PORT </dev/null >$DATFILE 2>$ERRFILE"
|
|
write_log 7 "#> $__RUNPROG"
|
|
eval $__RUNPROG
|
|
__ERR=$?
|
|
[ $__ERR -eq 0 ] && return 0
|
|
write_log 3 "Connect error - BusyBox nc (netcat) timeout Error '$__ERR'"
|
|
return 3
|
|
fi
|
|
}
|
|
|
|
# verfiy given DNS server if connectable
|
|
# $1 DNS server to verify
|
|
verify_dns() {
|
|
local __ERR=255 # last error buffer
|
|
local __CNT=0 # error counter
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error calling 'verify_dns()' - wrong number of parameters"
|
|
write_log 7 "Verify DNS server '$1'"
|
|
|
|
while [ $__ERR -ne 0 ]; do
|
|
# DNS uses port 53
|
|
verify_host_port "$1" "53"
|
|
__ERR=$?
|
|
if [ $LUCI_HELPER ]; then # no retry if called by LuCI helper script
|
|
return $__ERR
|
|
elif [ $__ERR -ne 0 -a $VERBOSE_MODE -gt 1 ]; then # VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Verify DNS server '$1' failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
|
|
return $__ERR
|
|
elif [ $__ERR -ne 0 ]; then
|
|
__CNT=$(( $__CNT + 1 )) # increment error counter
|
|
# if error count > retry_count leave here
|
|
[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
|
|
write_log 14 "Verify DNS server '$1' failed after $retry_count retries"
|
|
|
|
write_log 4 "Verify DNS server '$1' failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
|
|
sleep $RETRY_SECONDS &
|
|
PID_SLEEP=$!
|
|
wait $PID_SLEEP # enable trap-handler
|
|
PID_SLEEP=0
|
|
fi
|
|
done
|
|
return 0
|
|
}
|
|
|
|
# analyse and verfiy given proxy string
|
|
# $1 Proxy-String to verify
|
|
verify_proxy() {
|
|
# complete entry user:password@host:port
|
|
# inside user and password NO '@' of ":" allowed
|
|
# host and port only host:port
|
|
# host only host ERROR unsupported
|
|
# IPv4 address instead of host 123.234.234.123
|
|
# IPv6 address instead of host [xxxx:....:xxxx] in square bracket
|
|
local __TMP __HOST __PORT
|
|
local __ERR=255 # last error buffer
|
|
local __CNT=0 # error counter
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error calling 'verify_proxy()' - wrong number of parameters"
|
|
write_log 7 "Verify Proxy server 'http://$1'"
|
|
|
|
# try to split user:password "@" host:port
|
|
__TMP=$(echo $1 | awk -F "@" '{print $2}')
|
|
# no "@" found - only host:port is given
|
|
[ -z "$__TMP" ] && __TMP="$1"
|
|
# now lets check for IPv6 address
|
|
__HOST=$(echo $__TMP | grep -m 1 -o "$IPV6_REGEX")
|
|
# IPv6 host address found read port
|
|
if [ -n "$__HOST" ]; then
|
|
# IPv6 split at "]:"
|
|
__PORT=$(echo $__TMP | awk -F "]:" '{print $2}')
|
|
else
|
|
__HOST=$(echo $__TMP | awk -F ":" '{print $1}')
|
|
__PORT=$(echo $__TMP | awk -F ":" '{print $2}')
|
|
fi
|
|
# No Port detected - EXITING
|
|
[ -z "$__PORT" ] && {
|
|
[ $LUCI_HELPER ] && return 5
|
|
write_log 14 "Invalid Proxy server Error '5' - proxy port missing"
|
|
}
|
|
|
|
while [ $__ERR -gt 0 ]; do
|
|
verify_host_port "$__HOST" "$__PORT"
|
|
__ERR=$?
|
|
if [ $LUCI_HELPER ]; then # no retry if called by LuCI helper script
|
|
return $__ERR
|
|
elif [ $__ERR -gt 0 -a $VERBOSE_MODE -gt 1 ]; then # VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Verify Proxy server '$1' failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
|
|
return $__ERR
|
|
elif [ $__ERR -gt 0 ]; then
|
|
__CNT=$(( $__CNT + 1 )) # increment error counter
|
|
# if error count > retry_count leave here
|
|
[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
|
|
write_log 14 "Verify Proxy server '$1' failed after $retry_count retries"
|
|
|
|
write_log 4 "Verify Proxy server '$1' failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
|
|
sleep $RETRY_SECONDS &
|
|
PID_SLEEP=$!
|
|
wait $PID_SLEEP # enable trap-handler
|
|
PID_SLEEP=0
|
|
fi
|
|
done
|
|
return 0
|
|
}
|
|
|
|
do_transfer() {
|
|
# $1 # URL to use
|
|
local __URL="$1"
|
|
local __ERR=0
|
|
local __CNT=0 # error counter
|
|
local __PROG __RUNPROG
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error in 'do_transfer()' - wrong number of parameters"
|
|
|
|
# lets prefer GNU Wget because it does all for us - IPv4/IPv6/HTTPS/PROXY/force IP version
|
|
if /usr/bin/wget --version 2>&1 | grep "\+ssl" >/dev/null 2>&1 ; then
|
|
__PROG="/usr/bin/wget -nv -t 1 -O $DATFILE -o $ERRFILE" # non_verbose no_retry outfile errfile
|
|
# force ip version to use
|
|
if [ $force_ipversion -eq 1 ]; then
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6" # force IPv4/IPv6
|
|
fi
|
|
# set certificate parameters
|
|
if [ $use_https -eq 1 ]; then
|
|
if [ "$cacert" = "IGNORE" ]; then # idea from Ticket #15327 to ignore server cert
|
|
__PROG="$__PROG --no-check-certificate"
|
|
elif [ -f "$cacert" ]; then
|
|
__PROG="$__PROG --ca-certificate=${cacert}"
|
|
elif [ -d "$cacert" ]; then
|
|
__PROG="$__PROG --ca-directory=${cacert}"
|
|
else # exit here because it makes no sense to start loop
|
|
write_log 14 "No valid certificate(s) found at '$cacert' for HTTPS communication"
|
|
fi
|
|
fi
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
[ -z "$proxy" ] && __PROG="$__PROG --no-proxy"
|
|
|
|
__RUNPROG="$__PROG '$__URL'" # build final command
|
|
__PROG="GNU Wget" # reuse for error logging
|
|
|
|
# 2nd choice is cURL IPv4/IPv6/HTTPS
|
|
# libcurl might be compiled without Proxy Support (default in trunk)
|
|
elif [ -x /usr/bin/curl ]; then
|
|
__PROG="/usr/bin/curl -sS -o $DATFILE --stderr $ERRFILE"
|
|
# force ip version to use
|
|
if [ $force_ipversion -eq 1 ]; then
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6" # force IPv4/IPv6
|
|
fi
|
|
# set certificate parameters
|
|
if [ $use_https -eq 1 ]; then
|
|
if [ "$cacert" = "IGNORE" ]; then # idea from Ticket #15327 to ignore server cert
|
|
__PROG="$__PROG --insecure" # but not empty better to use "IGNORE"
|
|
elif [ -f "$cacert" ]; then
|
|
__PROG="$__PROG --cacert $cacert"
|
|
elif [ -d "$cacert" ]; then
|
|
__PROG="$__PROG --capath $cacert"
|
|
else # exit here because it makes no sense to start loop
|
|
write_log 14 "No valid certificate(s) found at '$cacert' for HTTPS communication"
|
|
fi
|
|
fi
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
# or check if libcurl compiled with proxy support
|
|
if [ -z "$proxy" ]; then
|
|
__PROG="$__PROG --noproxy '*'"
|
|
else
|
|
# if libcurl has no proxy support and proxy should be used then force ERROR
|
|
# libcurl currently no proxy support by default
|
|
grep -i "all_proxy" /usr/lib/libcurl.so* >/dev/null 2>&1 || \
|
|
write_log 13 "cURL: libcurl compiled without Proxy support"
|
|
fi
|
|
|
|
__RUNPROG="$__PROG '$__URL'" # build final command
|
|
__PROG="cURL" # reuse for error logging
|
|
|
|
# busybox Wget (did not support neither IPv6 nor HTTPS)
|
|
elif [ -x /usr/bin/wget ]; then
|
|
__PROG="/usr/bin/wget -q -O $DATFILE"
|
|
# force ip version not supported
|
|
[ $force_ipversion -eq 1 ] && \
|
|
write_log 14 "BusyBox Wget: can not force IP version to use"
|
|
# https not supported
|
|
[ $use_https -eq 1 ] && \
|
|
write_log 14 "BusyBox Wget: no HTTPS support"
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
[ -z "$proxy" ] && __PROG="$__PROG -Y off"
|
|
|
|
__RUNPROG="$__PROG '$__URL' 2>$ERRFILE" # build final command
|
|
__PROG="Busybox Wget" # reuse for error logging
|
|
|
|
else
|
|
write_log 13 "Neither 'Wget' nor 'cURL' installed or executable"
|
|
fi
|
|
|
|
while : ; do
|
|
write_log 7 "#> $__RUNPROG"
|
|
eval $__RUNPROG # DO transfer
|
|
__ERR=$? # save error code
|
|
[ $__ERR -eq 0 ] && return 0 # no error leave
|
|
[ $LUCI_HELPER ] && return 1 # no retry if called by LuCI helper script
|
|
|
|
write_log 3 "$__PROG Error: '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)" # report error
|
|
|
|
[ $VERBOSE_MODE -gt 1 ] && {
|
|
# VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Transfer failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
|
|
return 1
|
|
}
|
|
|
|
__CNT=$(( $__CNT + 1 )) # increment error counter
|
|
# if error count > retry_count leave here
|
|
[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
|
|
write_log 14 "Transfer failed after $retry_count retries"
|
|
|
|
write_log 4 "Transfer failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
|
|
sleep $RETRY_SECONDS &
|
|
PID_SLEEP=$!
|
|
wait $PID_SLEEP # enable trap-handler
|
|
PID_SLEEP=0
|
|
done
|
|
# we should never come here there must be a programming error
|
|
write_log 12 "Error in 'do_transfer()' - program coding error"
|
|
}
|
|
|
|
send_update() {
|
|
# $1 # IP to set at DDNS service provider
|
|
local __IP
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error calling 'send_update()' - wrong number of parameters"
|
|
|
|
# verify given IP / no private IPv4's / no IPv6 addr starting with fxxx of with ":"
|
|
[ $use_ipv6 -eq 0 ] && __IP=$(echo $1 | grep -v -E "(^0|^10\.|^127|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-1]\.|^192\.168)")
|
|
[ $use_ipv6 -eq 1 ] && __IP=$(echo $1 | grep "^[0-9a-eA-E]")
|
|
[ -z "$__IP" ] && write_log 4 "Private or invalid or no IP '$1' given"
|
|
|
|
if [ -n "$update_script" ]; then
|
|
write_log 7 "parsing script '$update_script'"
|
|
. $update_script
|
|
else
|
|
local __URL __ERR
|
|
|
|
# do replaces in URL
|
|
__URL=$(echo $update_url | sed -e "s#\[USERNAME\]#$URL_USER#g" -e "s#\[PASSWORD\]#$URL_PASS#g" \
|
|
-e "s#\[DOMAIN\]#$domain#g" -e "s#\[IP\]#$__IP#g")
|
|
[ $use_https -ne 0 ] && __URL=$(echo $__URL | sed -e 's#^http:#https:#')
|
|
|
|
do_transfer "$__URL" || return 1
|
|
|
|
write_log 7 "DDNS Provider answered:\n$(cat $DATFILE)"
|
|
|
|
return 0
|
|
# TODO analyse providers answer
|
|
# "good" or "nochg" = dyndns.com compatible API
|
|
# grep -i -E "good|nochg" $DATFILE >/dev/null 2>&1
|
|
# return $? # "0" if found
|
|
fi
|
|
}
|
|
|
|
get_local_ip () {
|
|
# $1 Name of Variable to store local IP (LOCAL_IP)
|
|
local __CNT=0 # error counter
|
|
local __RUNPROG __DATA __URL __ERR
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error calling 'get_local_ip()' - wrong number of parameters"
|
|
write_log 7 "Detect local IP"
|
|
|
|
while : ; do
|
|
case $ip_source in
|
|
network)
|
|
# set correct program
|
|
[ $use_ipv6 -eq 0 ] && __RUNPROG="network_get_ipaddr" \
|
|
|| __RUNPROG="network_get_ipaddr6"
|
|
write_log 7 "#> $__RUNPROG __DATA '$ip_network'"
|
|
eval "$__RUNPROG __DATA $ip_network" || write_log 3 "$__RUNPROG Error: '$?'"
|
|
[ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected on network '$ip_network'"
|
|
;;
|
|
interface)
|
|
write_log 7 "#> ifconfig $ip_interface >$DATFILE 2>$ERRFILE"
|
|
ifconfig $ip_interface >$DATFILE 2>$ERRFILE
|
|
__ERR=$?
|
|
if [ $__ERR -eq 0 ]; then
|
|
if [ $use_ipv6 -eq 0 ]; then
|
|
__DATA=$(awk '
|
|
/inet addr:/ { # Filter IPv4
|
|
# inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
|
|
$1=""; # remove inet
|
|
$3=""; # remove Bcast: ...
|
|
$4=""; # remove Mask: ...
|
|
FS=":"; # separator ":"
|
|
$0=$0; # reread to activate separator
|
|
$1=""; # remove addr
|
|
FS=" "; # set back separator to default " "
|
|
$0=$0; # reread to activate separator (remove whitespaces)
|
|
print $1; # print IPv4 addr
|
|
}' $DATFILE
|
|
)
|
|
else
|
|
__DATA=$(awk '
|
|
/inet6/ && /: [0-9a-eA-E]/ && !/\/128/ { # Filter IPv6 exclude fxxx and /128 prefix
|
|
# inet6 addr: 2001:db8::xxxx:xxxx/32 Scope:Global
|
|
FS="/"; # separator "/"
|
|
$0=$0; # reread to activate separator
|
|
$2=""; # remove everything behind "/"
|
|
FS=" "; # set back separator to default " "
|
|
$0=$0; # reread to activate separator
|
|
print $3; # print IPv6 addr
|
|
}' $DATFILE
|
|
)
|
|
fi
|
|
[ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected on interface '$ip_interface'"
|
|
else
|
|
write_log 3 "ifconfig Error: '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)" # report error
|
|
fi
|
|
;;
|
|
script)
|
|
write_log 7 "#> $ip_script >$DATFILE 2>$ERRFILE"
|
|
eval $ip_script >$DATFILE 2>$ERRFILE
|
|
__ERR=$?
|
|
if [ $__ERR -eq 0 ]; then
|
|
__DATA=$(cat $DATFILE)
|
|
[ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected via script '$ip_script'"
|
|
else
|
|
write_log 3 "$ip_script Error: '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)" # report error
|
|
fi
|
|
;;
|
|
web)
|
|
do_transfer "$ip_url"
|
|
# use correct regular expression
|
|
[ $use_ipv6 -eq 0 ] \
|
|
&& __DATA=$(grep -m 1 -o "$IPV4_REGEX" $DATFILE) \
|
|
|| __DATA=$(grep -m 1 -o "$IPV6_REGEX" $DATFILE)
|
|
[ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected on web at '$__URL'"
|
|
;;
|
|
*)
|
|
write_log 12 "Error in 'get_local_ip()' - unhandled ip_source '$ip_source'"
|
|
;;
|
|
esac
|
|
# valid data found return here
|
|
[ -n "$__DATA" ] && {
|
|
eval "$1=\"$__DATA\""
|
|
return 0
|
|
}
|
|
|
|
[ $LUCI_HELPER ] && return 1 # no retry if called by LuCI helper script
|
|
|
|
write_log 7 "Data detected:\n$(cat $DATFILE)"
|
|
|
|
[ $VERBOSE_MODE -gt 1 ] && {
|
|
# VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Get local IP via '$ip_source' failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
|
|
return 1
|
|
}
|
|
|
|
__CNT=$(( $__CNT + 1 )) # increment error counter
|
|
# if error count > retry_count leave here
|
|
[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
|
|
write_log 14 "Get local IP via '$ip_source' failed after $retry_count retries"
|
|
write_log 4 "Get local IP via '$ip_source' failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
|
|
sleep $RETRY_SECONDS &
|
|
PID_SLEEP=$!
|
|
wait $PID_SLEEP # enable trap-handler
|
|
PID_SLEEP=0
|
|
done
|
|
# we should never come here there must be a programming error
|
|
write_log 12 "Error in 'get_local_ip()' - program coding error"
|
|
}
|
|
|
|
get_registered_ip() {
|
|
# $1 Name of Variable to store public IP (REGISTERED_IP)
|
|
# $2 (optional) if set, do not retry on error
|
|
local __CNT=0 # error counter
|
|
local __ERR=255
|
|
local __REGEX __PROG __RUNPROG __DATA
|
|
# return codes
|
|
# 1 no IP detected
|
|
|
|
[ $# -lt 1 -o $# -gt 2 ] && write_log 12 "Error calling 'get_registered_ip()' - wrong number of parameters"
|
|
write_log 7 "Detect registered/public IP"
|
|
|
|
# set correct regular expression
|
|
[ $use_ipv6 -eq 0 ] && __REGEX="$IPV4_REGEX" || __REGEX="$IPV6_REGEX"
|
|
|
|
if [ -x /usr/bin/host ]; then
|
|
__PROG="/usr/bin/host"
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -t A" || __PROG="$__PROG -t AAAA"
|
|
if [ $force_ipversion -eq 1 ]; then # force IP version
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6"
|
|
fi
|
|
[ $force_dnstcp -eq 1 ] && __PROG="$__PROG -T" # force TCP
|
|
|
|
__RUNPROG="$__PROG $domain $dns_server >$DATFILE 2>$ERRFILE"
|
|
__PROG="BIND host"
|
|
elif [ -x /usr/bin/nslookup ]; then # last use BusyBox nslookup
|
|
[ $force_ipversion -ne 0 -o $force_dnstcp -ne 0 ] && \
|
|
write_log 14 "Busybox nslookup - no support to 'force IP Version' or 'DNS over TCP'"
|
|
|
|
__RUNPROG="/usr/bin/nslookup $domain $dns_server >$DATFILE 2>$ERRFILE"
|
|
__PROG="BusyBox nslookup"
|
|
else # there must be an error
|
|
write_log 12 "Error in 'get_registered_ip()' - no supported Name Server lookup software accessible"
|
|
fi
|
|
|
|
while : ; do
|
|
write_log 7 "#> $__RUNPROG"
|
|
eval $__RUNPROG
|
|
__ERR=$?
|
|
if [ $__ERR -ne 0 ]; then
|
|
write_log 3 "$__PROG error: '$__ERR'"
|
|
write_log 7 "$(cat $ERRFILE)"
|
|
else
|
|
if [ "$__PROG" = "BIND host" ]; then
|
|
__DATA=$(cat $DATFILE | awk -F "address " '/has/ {print $2; exit}' )
|
|
else
|
|
__DATA=$(cat $DATFILE | sed -ne "3,\$ { s/^Address [0-9]*: \($__REGEX\).*$/\\1/p }" )
|
|
fi
|
|
[ -n "$__DATA" ] && {
|
|
write_log 7 "Registered IP '$__DATA' detected"
|
|
eval "$1=\"$__DATA\"" # valid data found
|
|
return 0 # leave here
|
|
}
|
|
write_log 4 "NO valid IP found"
|
|
__ERR=127
|
|
fi
|
|
|
|
[ $LUCI_HELPER ] && return $__ERR # no retry if called by LuCI helper script
|
|
[ -n "$2" ] && return $__ERR # $2 is given -> no retry
|
|
[ $VERBOSE_MODE -gt 1 ] && {
|
|
# VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Get registered/public IP for '$domain' failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
|
|
return $__ERR
|
|
}
|
|
|
|
__CNT=$(( $__CNT + 1 )) # increment error counter
|
|
# if error count > retry_count leave here
|
|
[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
|
|
write_log 14 "Get registered/public IP for '$domain' failed after $retry_count retries"
|
|
|
|
write_log 4 "Get registered/public IP for '$domain' failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
|
|
sleep $RETRY_SECONDS &
|
|
PID_SLEEP=$!
|
|
wait $PID_SLEEP # enable trap-handler
|
|
PID_SLEEP=0
|
|
done
|
|
# we should never come here there must be a programming error
|
|
write_log 12 "Error in 'get_registered_ip()' - program coding error"
|
|
}
|
|
|
|
get_uptime() {
|
|
# $1 Variable to store result in
|
|
[ $# -ne 1 ] && write_log 12 "Error calling 'verify_host_port()' - wrong number of parameters"
|
|
local __UPTIME=$(cat /proc/uptime)
|
|
eval "$1=\"${__UPTIME%%.*}\""
|
|
}
|
|
|
|
trap_handler() {
|
|
# $1 trap signal
|
|
# $2 optional (exit status)
|
|
local __PIDS __PID
|
|
local __ERR=${2:-0}
|
|
local __OLD_IFS=$IFS
|
|
local __NEWLINE_IFS='
|
|
' #__NEWLINE_IFS
|
|
|
|
[ $PID_SLEEP -ne 0 ] && kill -$1 $PID_SLEEP 2>/dev/null # kill pending sleep if exist
|
|
|
|
case $1 in
|
|
0) if [ $__ERR -eq 0 ]; then
|
|
write_log 5 "PID '$$' exit normal at $(eval $DATE_PROG)\n"
|
|
else
|
|
write_log 4 "PID '$$' exit WITH ERROR '$__ERR' at $(eval $DATE_PROG)\n"
|
|
fi ;;
|
|
1) write_log 6 "PID '$$' received 'SIGHUP' at $(eval $DATE_PROG)"
|
|
# reload config via starting the script again
|
|
eval "/usr/lib/ddns/dynamic_dns_updater.sh $SECTION_ID $VERBOSE_MODE &"
|
|
exit 0 ;; # and leave this one
|
|
2) write_log 5 "PID '$$' terminated by 'SIGINT' at $(eval $DATE_PROG)\n";;
|
|
3) write_log 5 "PID '$$' terminated by 'SIGQUIT' at $(eval $DATE_PROG)\n";;
|
|
15) write_log 5 "PID '$$' terminated by 'SIGTERM' at $(eval $DATE_PROG)\n";;
|
|
*) write_log 13 "Unhandled signal '$1' in 'trap_handler()'";;
|
|
esac
|
|
|
|
__PIDS=$(pgrep -P $$) # get my childs (pgrep prints with "newline")
|
|
IFS=$__NEWLINE_IFS
|
|
for __PID in $__PIDS; do
|
|
kill -$1 $__PID # terminate it
|
|
done
|
|
IFS=$__OLD_IFS
|
|
|
|
# remove out and err file
|
|
[ -f $DATFILE ] && rm -f $DATFILE
|
|
[ -f $ERRFILE ] && rm -f $ERRFILE
|
|
|
|
# exit with correct handling:
|
|
# remove trap handling settings and send kill to myself
|
|
trap - 0 1 2 3 15
|
|
[ $1 -gt 0 ] && kill -$1 $$
|
|
}
|