--- /dev/null
+#!/bin/sh
+# /usr/lib/ddns/dynamic_dns_functions.sh
+#
+#.Distributed under the terms of the GNU General Public License (GPL) version 2.0
+# Original written by Eric Paul Bishop, January 2008
+# (Loosely) based on the script on the one posted by exobyte in the forums here:
+# http://forum.openwrt.org/viewtopic.php?id=14040
+# extended and partial rewritten
+#.2014-2018 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
+#
+# function timeout
+# copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
+# @author Anthony Thyssen 6 April 2011
+#
+# variables in small chars are read from /etc/config/ddns
+# variables in big chars are defined inside these scripts as global vars
+# variables in big chars beginning with "__" are local defined inside functions only
+# set -vx #script debugger
+
+. /lib/functions.sh
+. /lib/functions/network.sh
+
+# GLOBAL VARIABLES #
+if [ -f "/usr/share/ddns/version" ]; then
+ VERSION="$(cat "/usr/share/ddns/version")"
+else
+ VERSION="unknown"
+fi
+SECTION_ID="" # hold config's section name
+VERBOSE=0 # default mode is log to console, but easily changed with parameter
+MYPROG=$(basename $0) # my program call name
+
+LOGFILE="" # logfile - all files are set in dynamic_dns_updater.sh
+PIDFILE="" # pid file
+UPDFILE="" # store UPTIME of last update
+DATFILE="" # save stdout data of WGet and other external programs called
+ERRFILE="" # save stderr output of WGet and other external programs called
+IPFILE="" # store registered IP for read by LuCI status
+TLDFILE=/usr/share/public_suffix_list.dat.gz # TLD file used by split_FQDN
+
+CHECK_SECONDS=0 # calculated seconds out of given
+FORCE_SECONDS=0 # interval and unit
+RETRY_SECONDS=0 # in configuration
+
+LAST_TIME=0 # holds the uptime of last successful update
+CURR_TIME=0 # holds the current uptime
+NEXT_TIME=0 # calculated time for next FORCED update
+EPOCH_TIME=0 # seconds since 1.1.1970 00:00:00
+
+REGISTERED_IP="" # holds the IP read from DNS
+LOCAL_IP="" # holds the local IP read from the box
+
+URL_USER="" # url encoded $username from config file
+URL_PASS="" # url encoded $password from config file
+URL_PENC="" # url encoded $param_enc from config file
+
+UPD_ANSWER="" # Answer given by service on success
+
+ERR_LAST=0 # used to save $? return code of program and function calls
+ERR_UPDATE=0 # error counter on different local and registered ip
+
+PID_SLEEP=0 # ProcessID of current background "sleep"
+
+# regular expression to detect IPv4 / IPv6
+# IPv4 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x
+IPV4_REGEX="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
+# IPv6 ( ( 0-9a-f 1-4char ":") min 1x) ( ( 0-9a-f 1-4char )optional) ( (":" 0-9a-f 1-4char ) min 1x)
+IPV6_REGEX="\(\([0-9A-Fa-f]\{1,4\}:\)\{1,\}\)\(\([0-9A-Fa-f]\{1,4\}\)\{0,1\}\)\(\(:[0-9A-Fa-f]\{1,4\}\)\{1,\}\)"
+
+# characters that are dangerous to pass to a shell command line
+SHELL_ESCAPE="[\"\'\`\$\!();><{}?|\[\]\*\\\\]"
+
+# dns character set
+DNS_CHARSET="[@a-zA-Z0-9._-]"
+
+# detect if called by ddns-lucihelper.sh script, disable retrys (empty variable == false)
+LUCI_HELPER=$(printf %s "$MYPROG" | grep -i "luci")
+
+# Name Server Lookup Programs
+BIND_HOST=$(command -v host)
+KNOT_HOST=$(command -v khost)
+DRILL=$(command -v drill)
+HOSTIP=$(command -v hostip)
+NSLOOKUP=$(command -v nslookup)
+
+# Transfer Programs
+WGET=$(command -v wget)
+WGET_SSL=$(command -v wget-ssl)
+
+CURL=$(command -v curl)
+# CURL_SSL not empty then SSL support available
+CURL_SSL=$($CURL -V 2>/dev/null | grep -F "https")
+# CURL_PROXY not empty then Proxy support available
+CURL_PROXY=$(find /lib /usr/lib -name libcurl.so* -exec strings {} 2>/dev/null \; | grep -im1 "all_proxy")
+
+UCLIENT_FETCH=$(command -v uclient-fetch)
+
+# Global configuration settings
+# allow NON-public IP's
+upd_privateip=$(uci -q get ddns.global.upd_privateip) || upd_privateip=0
+
+# directory to store run information to.
+ddns_rundir=$(uci -q get ddns.global.ddns_rundir) || ddns_rundir="/var/run/ddns"
+[ -d $ddns_rundir ] || mkdir -p -m755 $ddns_rundir
+
+# directory to store log files
+ddns_logdir=$(uci -q get ddns.global.ddns_logdir) || ddns_logdir="/var/log/ddns"
+[ -d $ddns_logdir ] || mkdir -p -m755 $ddns_logdir
+
+# number of lines to before rotate logfile
+ddns_loglines=$(uci -q get ddns.global.ddns_loglines) || ddns_loglines=250
+ddns_loglines=$((ddns_loglines + 1)) # correct sed handling
+
+# format to show date information in log and luci-app-ddns default ISO 8601 format
+ddns_dateformat=$(uci -q get ddns.global.ddns_dateformat) || ddns_dateformat="%F %R"
+DATE_PROG="date +'$ddns_dateformat'"
+
+# USE_CURL if GNU Wget and cURL installed normally Wget is used by do_transfer()
+# to change this use global option use_curl '1'
+USE_CURL=$(uci -q get ddns.global.use_curl) || USE_CURL=0 # read config
+[ -n "$CURL" ] || USE_CURL=0 # check for cURL
+
+# loads all options for a given package and section
+# also, sets all_option_variables to a list of the variable names
+# $1 = ddns, $2 = SECTION_ID
+load_all_config_options()
+{
+ local __PKGNAME="$1"
+ local __SECTIONID="$2"
+ local __VAR
+ local __ALL_OPTION_VARIABLES=""
+
+ # this callback loads all the variables in the __SECTIONID section when we do
+ # config_load. We need to redefine the option_cb for different sections
+ # so that the active one isn't still active after we're done with it. For reference
+ # the $1 variable is the name of the option and $2 is the name of the section
+ config_cb()
+ {
+ if [ ."$2" = ."$__SECTIONID" ]; then
+ option_cb()
+ {
+ __ALL_OPTION_VARIABLES="$__ALL_OPTION_VARIABLES $1"
+ }
+ else
+ option_cb() { return 0; }
+ fi
+ }
+
+ config_load "$__PKGNAME"
+
+ # Given SECTION_ID not found so no data, so return 1
+ [ -z "$__ALL_OPTION_VARIABLES" ] && return 1
+
+ for __VAR in $__ALL_OPTION_VARIABLES
+ do
+ config_get "$__VAR" "$__SECTIONID" "$__VAR"
+ done
+ return 0
+}
+
+# read's all service sections from ddns config
+# $1 = Name of variable to store
+load_all_service_sections() {
+ local __DATA=""
+ config_cb()
+ {
+ # only look for section type "service", ignore everything else
+ [ "$1" = "service" ] && __DATA="$__DATA $2"
+ }
+ config_load "ddns"
+
+ eval "$1=\"$__DATA\""
+ return
+}
+
+# starts updater script for all given sections or only for the one given
+# $1 = interface (Optional: when given only scripts are started
+# configured for that interface)
+# used by /etc/hotplug.d/iface/95-ddns on IFUP
+# and by /etc/init.d/ddns start
+start_daemon_for_all_ddns_sections()
+{
+ local __EVENTIF="$1"
+ local __SECTIONS=""
+ local __SECTIONID=""
+ local __IFACE=""
+
+ load_all_service_sections __SECTIONS
+ for __SECTIONID in $__SECTIONS; do
+ config_get __IFACE "$__SECTIONID" interface "wan"
+ [ -z "$__EVENTIF" -o "$__IFACE" = "$__EVENTIF" ] || continue
+ if [ $VERBOSE -eq 0 ]; then # start in background
+ /usr/lib/ddns/dynamic_dns_updater.sh -v 0 -S "$__SECTIONID" -- start &
+ else
+ /usr/lib/ddns/dynamic_dns_updater.sh -v "$VERBOSE" -S "$__SECTIONID" -- start
+ fi
+ done
+}
+
+# stop sections process incl. childs (sleeps)
+# $1 = section
+stop_section_processes() {
+ local __PID=0
+ local __PIDFILE="$ddns_rundir/$1.pid"
+ [ $# -ne 1 ] && write_log 12 "Error calling 'stop_section_processes()' - wrong number of parameters"
+
+ [ -e "$__PIDFILE" ] && {
+ __PID=$(cat $__PIDFILE)
+ ps | grep "^[\t ]*$__PID" >/dev/null 2>&1 && kill $__PID || __PID=0 # terminate it
+ }
+ [ $__PID -eq 0 ] # report if process was running
+}
+
+# stop updater script for all defines sections or only for one given
+# $1 = interface (optional)
+# used by /etc/hotplug.d/iface/95-ddns on 'ifdown'
+# and by /etc/init.d/ddns stop
+# needed because we also need to kill "sleep" child processes
+stop_daemon_for_all_ddns_sections() {
+ local __EVENTIF="$1"
+ local __SECTIONS=""
+ local __SECTIONID=""
+ local __IFACE=""
+
+ load_all_service_sections __SECTIONS
+ for __SECTIONID in $__SECTIONS; do
+ config_get __IFACE "$__SECTIONID" interface "wan"
+ [ -z "$__EVENTIF" -o "$__IFACE" = "$__EVENTIF" ] || continue
+ stop_section_processes "$__SECTIONID"
+ done
+}
+
+# reports to console, logfile, syslog
+# $1 loglevel 7 == Debug to 0 == EMERG
+# value +10 will exit the scripts
+# $2..n text to report
+write_log() {
+ local __LEVEL __EXIT __CMD __MSG __MSE
+ local __TIME=$(date +%H%M%S)
+ [ $1 -ge 10 ] && {
+ __LEVEL=$(($1-10))
+ __EXIT=1
+ } || {
+ __LEVEL=$1
+ __EXIT=0
+ }
+ shift # remove loglevel
+ [ $__EXIT -eq 0 ] && __MSG="$*" || __MSG="$* - TERMINATE"
+ case $__LEVEL in # create log message and command depending on loglevel
+ 0) __CMD="logger -p user.emerg -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME EMERG : $__MSG" ;;
+ 1) __CMD="logger -p user.alert -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME ALERT : $__MSG" ;;
+ 2) __CMD="logger -p user.crit -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME CRIT : $__MSG" ;;
+ 3) __CMD="logger -p user.err -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME ERROR : $__MSG" ;;
+ 4) __CMD="logger -p user.warn -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME WARN : $__MSG" ;;
+ 5) __CMD="logger -p user.notice -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME note : $__MSG" ;;
+ 6) __CMD="logger -p user.info -t ddns-scripts[$$] $SECTION_ID: $__MSG"
+ __MSG=" $__TIME info : $__MSG" ;;
+ 7) __MSG=" $__TIME : $__MSG";;
+ *) return;;
+ esac
+
+ # verbose echo
+ [ $VERBOSE -gt 0 -o $__EXIT -gt 0 ] && echo -e "$__MSG"
+ # write to logfile
+ if [ ${use_logfile:-1} -eq 1 -o $VERBOSE -gt 1 ]; then
+ if [ -n "$password" ]; then
+ # url encode __MSG, password already done
+ urlencode __MSE "$__MSG"
+ # replace encoded password inside encoded message
+ # and url decode (newline was encoded as %00)
+ __MSG=$( echo -e "$__MSE" \
+ | sed -e "s/$URL_PASS/***PW***/g" \
+ | sed -e "s/+/ /g; s/%00/\n/g; s/%/\\\\x/g" | xargs -0 printf "%b" )
+ fi
+ printf "%s\n" "$__MSG" >> $LOGFILE
+ # VERBOSE > 1 then NO loop so NO truncate log to $ddns_loglines lines
+ [ $VERBOSE -gt 1 ] || sed -i -e :a -e '$q;N;'$ddns_loglines',$D;ba' $LOGFILE
+ fi
+ [ -n "$LUCI_HELPER" ] && return # nothing else todo when running LuCI helper script
+ [ $__LEVEL -eq 7 ] && return # no syslog for debug messages
+ __CMD=$(echo -e "$__CMD" | tr -d '\n' | tr '\t' ' ') # remove \n \t chars
+ [ $__EXIT -eq 1 ] && {
+ eval '$__CMD' # force syslog before exit
+ exit 1
+ }
+ [ $use_syslog -eq 0 ] && return
+ [ $((use_syslog + __LEVEL)) -le 7 ] && eval '$__CMD'
+
+ return
+}
+
+# replace all special chars to their %hex value
+# used for USERNAME and PASSWORD in update_url
+# unchanged: "-"(minus) "_"(underscore) "."(dot) "~"(tilde)
+# to verify: "'"(single quote) '"'(double quote) # because shell delimiter
+# "$"(Dollar) # because used as variable output
+# tested with the following string stored via Luci Application as password / username
+# A B!"#AA$1BB%&'()*+,-./:;<=>?@[\]^_`{|}~ without problems at Dollar or quotes
+urlencode() {
+ # $1 Name of Variable to store encoded string to
+ # $2 string to encode
+ local __ENC
+
+ [ $# -ne 2 ] && write_log 12 "Error calling 'urlencode()' - wrong number of parameters"
+
+ __ENC="$(awk -v str="$2" 'BEGIN{ORS="";for(i=32;i<=127;i++)lookup[sprintf("%c",i)]=i
+ for(k=1;k<=length(str);++k){enc=substr(str,k,1);if(enc!~"[-_.~a-zA-Z0-9]")enc=sprintf("%%%02x", lookup[enc]);print enc}}')"
+
+ eval "$1=\"$__ENC\"" # transfer back to variable
+ return 0
+}
+
+# extract url or script for given DDNS Provider from
+# directory /usr/share/ddns/services/ipv4/ for IPv4
+# or from
+# directory /usr/share/ddns/services/ipv6/ for IPv6
+# $1 Name of the provider
+# $1 Name of Variable to store url to
+# $2 Name of Variable to store script to
+# $3 Name of Variable to store service answer to
+get_service_data() {
+ local provider="$1"
+ shift
+
+ . /usr/share/libubox/jshn.sh
+ local dir="/usr/share/ddns/services"
+ local name data url answer script
+
+ [ $# -ne 3 ] && write_log 12 "Error calling 'get_service_data()' - wrong number of parameters"
+
+ [ -f "${dir}/${provider}.json" ] || {
+ eval "$1=\"\""
+ eval "$2=\"\""
+ eval "$3=\"\""
+ return 1
+ }
+
+ json_load_file "${dir}/${provider}.json"
+ json_get_var name "name"
+ if [ "$use_ipv6" -eq "1" ]; then
+ json_select "ipv6"
+ else
+ json_select "ipv4"
+ fi
+ json_get_var data "url"
+ json_get_var answer "answer"
+ json_select ".."
+ json_cleanup
+
+ # check if URL or SCRIPT is given
+ url=$(echo "$data" | grep "^http")
+ [ -z "$url" ] && script="/usr/lib/ddns/${data}"
+
+ eval "$1=\"$url\""
+ eval "$2=\"$script\""
+ eval "$3=\"$answer\""
+ return 0
+}
+
+# Calculate seconds from interval and unit
+# $1 Name of Variable to store result in
+# $2 Number and
+# $3 Unit of time interval
+get_seconds() {
+ [ $# -ne 3 ] && write_log 12 "Error calling 'get_seconds()' - wrong number of parameters"
+ case "$3" in
+ "days" ) eval "$1=$(( $2 * 86400 ))";;
+ "hours" ) eval "$1=$(( $2 * 3600 ))";;
+ "minutes" ) eval "$1=$(( $2 * 60 ))";;
+ * ) eval "$1=$2";;
+ esac
+ return 0
+}
+
+timeout() {
+ #.copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
+ # only did the following changes
+ # - commented out "#!/bin/bash" and usage section
+ # - replace exit by return for usage as function
+ # - some reformatting
+ #
+ # timeout [-SIG] time [--] command args...
+ #
+ # Run the given command until completion, but kill it if it runs too long.
+ # Specifically designed to exit immediately (no sleep interval) and clean up
+ # nicely without messages or leaving any extra processes when finished.
+ #
+ # Example use
+ # timeout 5 countdown
+ #
+ # Based on notes in my "Shell Script Hints", section "Command Timeout"
+ # http://www.ict.griffith.edu.au/~anthony/info/shell/script.hints
+ #
+ # This script uses a lot of tricks to terminate both the background command,
+ # the timeout script, and even the sleep process. It also includes trap
+ # commands to prevent sub-shells reporting expected "Termination Errors".
+ #
+ # It took years of occasional trials, errors and testing to get a pure bash
+ # timeout command working as well as this does.
+ #
+ #.Anthony Thyssen 6 April 2011
+ #
+# PROGNAME=$(type $0 | awk '{print $3}') # search for executable on path
+# PROGDIR=$(dirname $PROGNAME) # extract directory of program
+# PROGNAME=$(basename $PROGNAME) # base name of program
+
+ # output the script comments as docs
+# Usage() {
+# echo >&2 "$PROGNAME:" "$@"
+# sed >&2 -n '/^###/q; /^#/!q; s/^#//; s/^ //; 3s/^/Usage: /; 2,$ p' "$PROGDIR/$PROGNAME"
+# exit 10;
+# }
+
+ SIG=-TERM
+
+ while [ $# -gt 0 ]; do
+ case "$1" in
+ --)
+ # forced end of user options
+ shift;
+ break ;;
+# -\?|--help|--doc*)
+# Usage ;;
+ [0-9]*)
+ TIMEOUT="$1" ;;
+ -*)
+ SIG="$1" ;;
+ *)
+ # unforced end of user options
+ break ;;
+ esac
+ shift # next option
+ done
+
+ # run main command in backgrounds and get its pid
+ "$@" &
+ command_pid=$!
+
+ # timeout sub-process abort countdown after ABORT seconds! also backgrounded
+ sleep_pid=0
+ (
+ # cleanup sleep process
+ trap 'kill -TERM $sleep_pid; return 1' 1 2 3 15
+ # sleep timeout period in background
+ sleep $TIMEOUT &
+ sleep_pid=$!
+ wait $sleep_pid
+ # Abort the command
+ kill $SIG $command_pid >/dev/null 2>&1
+ return 1
+ ) &
+ timeout_pid=$!
+
+ # Wait for main command to finished or be timed out
+ wait $command_pid
+ status=$?
+
+ # Clean up timeout sub-shell - if it is still running!
+ kill $timeout_pid 2>/dev/null
+ wait $timeout_pid 2>/dev/null
+
+ # Uncomment to check if a LONG sleep still running (no sleep should be)
+ # sleep 1
+ # echo "-----------"
+ # /bin/ps j # uncomment to show if abort "sleep" is still sleeping
+
+ return $status
+}
+
+# sanitize a variable
+# $1 variable name
+# $2 allowed shell pattern
+# $3 disallowed shell pattern
+sanitize_variable() {
+ local __VAR=$1
+ eval __VALUE=\$$__VAR
+ local __ALLOWED=$2
+ local __REJECT=$3
+
+ # removing all allowed should give empty string
+ if [ -n "$__ALLOWED" ]; then
+ [ -z "${__VALUE//$__ALLOWED}" ] || write_log 12 "sanitize on $__VAR found characters outside allowed subset"
+ fi
+
+ # removing rejected pattern should give the same string as the input
+ if [ -n "$__REJECT" ]; then
+ [ "$__VALUE" = "${__VALUE//$__REJECT}" ] || write_log 12 "sanitize on $__VAR found rejected characters"
+ fi
+}
+
+# verify given host and port is connectable
+# $1 Host/IP to verify
+# $2 Port to verify
+verify_host_port() {
+ local __HOST=$1
+ local __PORT=$2
+ local __NC=$(command -v nc)
+ local __NCEXT=$($(command -v nc) --help 2>&1 | grep "\-w" 2>/dev/null) # busybox nc compiled with extensions
+ local __IP __IPV4 __IPV6 __RUNPROG __PROG __ERR
+ # return codes
+ # 1 system specific error
+ # 2 nslookup/host error
+ # 3 nc (netcat) error
+ # 4 unmatched IP version
+
+ [ $# -ne 2 ] && write_log 12 "Error calling 'verify_host_port()' - wrong number of parameters"
+
+ # check if ip or FQDN was given
+ __IPV4=$(echo $__HOST | grep -m 1 -o "$IPV4_REGEX$") # do not detect ip in 0.0.0.0.example.com
+ __IPV6=$(echo $__HOST | grep -m 1 -o "$IPV6_REGEX")
+ # if FQDN given get IP address
+ [ -z "$__IPV4" -a -z "$__IPV6" ] && {
+ if [ -n "$BIND_HOST" ]; then # use BIND host if installed
+ __PROG="BIND host"
+ __RUNPROG="$BIND_HOST $__HOST >$DATFILE 2>$ERRFILE"
+ elif [ -n "$KNOT_HOST" ]; then # use Knot host if installed
+ __PROG="Knot host"
+ __RUNPROG="$KNOT_HOST $__HOST >$DATFILE 2>$ERRFILE"
+ elif [ -n "$DRILL" ]; then # use drill if installed
+ __PROG="drill"
+ __RUNPROG="$DRILL -V0 $__HOST A >$DATFILE 2>$ERRFILE" # IPv4
+ __RUNPROG="$__RUNPROG; $DRILL -V0 $__HOST AAAA >>$DATFILE 2>>$ERRFILE" # IPv6
+ elif [ -n "$HOSTIP" ]; then # use hostip if installed
+ __PROG="hostip"
+ __RUNPROG="$HOSTIP $__HOST >$DATFILE 2>$ERRFILE" # IPv4
+ __RUNPROG="$__RUNPROG; $HOSTIP -6 $__HOST >>$DATFILE 2>>$ERRFILE" # IPv6
+ else # use BusyBox nslookup
+ __PROG="BusyBox nslookup"
+ __RUNPROG="$NSLOOKUP $__HOST >$DATFILE 2>$ERRFILE"
+ fi
+ write_log 7 "#> $__RUNPROG"
+ eval $__RUNPROG
+ __ERR=$?
+ # command error
+ [ $__ERR -gt 0 ] && {
+ write_log 3 "DNS Resolver Error - $__PROG Error '$__ERR'"
+ write_log 7 "$(cat $ERRFILE)"
+ return 2
+ }
+ # extract IP address
+ if [ -n "$BIND_HOST" -o -n "$KNOT_HOST" ]; then # use BIND host or Knot host if installed
+ __IPV4="$(awk -F "address " '/has address/ {print $2; exit}' "$DATFILE")"
+ __IPV6="$(awk -F "address " '/has IPv6/ {print $2; exit}' "$DATFILE")"
+ elif [ -n "$DRILL" ]; then # use drill if installed
+ __IPV4="$(awk '/^'"$__HOST"'/ {print $5}' "$DATFILE" | grep -m 1 -o "$IPV4_REGEX")"
+ __IPV6="$(awk '/^'"$__HOST"'/ {print $5}' "$DATFILE" | grep -m 1 -o "$IPV6_REGEX")"
+ elif [ -n "$HOSTIP" ]; then # use hostip if installed
+ __IPV4="$(grep -m 1 -o "$IPV4_REGEX" "$DATFILE")"
+ __IPV6="$(grep -m 1 -o "$IPV6_REGEX" "$DATFILE")"
+ else # use BusyBox nslookup
+ __IPV4="$(sed -ne "/^Name:/,\$ { s/^Address[0-9 ]\{0,\}: \($IPV4_REGEX\).*$/\\1/p }" "$DATFILE")"
+ __IPV6="$(sed -ne "/^Name:/,\$ { s/^Address[0-9 ]\{0,\}: \($IPV6_REGEX\).*$/\\1/p }" "$DATFILE")"
+ fi
+ }
+
+ # 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
+ [ $__ERR -gt 0 ] && {
+ [ -n "$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
+ $__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
+ $__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 available on any host interface
+ # not worrying, if there is an IPv6 wan address
+ # so if not "force_ipversion" to use_ipv6 then connect test via ipv4, if available
+ [ $force_ipversion -ne 0 -a $use_ipv6 -ne 0 -o -z "$__IPV4" ] && __IP=$__IPV6 || __IP=$__IPV4
+
+ if [ -n "$__NCEXT" ]; then # BusyBox nc compiled with extensions (timeout support)
+ __RUNPROG="$__NC -w 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 -- $__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
+}
+
+# verify 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 [ -n "$LUCI_HELPER" ]; then # no retry if called by LuCI helper script
+ return $__ERR
+ elif [ $__ERR -ne 0 -a $VERBOSE -gt 1 ]; then # VERBOSE > 1 then NO retry
+ write_log 4 "Verify DNS server '$1' failed - Verbose Mode: $VERBOSE - 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
+}
+
+# analyze and verify 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" ] && {
+ [ -n "$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 [ -n "$LUCI_HELPER" ]; then # no retry if called by LuCI helper script
+ return $__ERR
+ elif [ $__ERR -gt 0 -a $VERBOSE -gt 1 ]; then # VERBOSE > 1 then NO retry
+ write_log 4 "Verify Proxy server '$1' failed - Verbose Mode: $VERBOSE - 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
+
+ [ $# -ne 1 ] && write_log 12 "Error in 'do_transfer()' - wrong number of parameters"
+
+ # lets prefer GNU Wget because it does all for us - IPv4/IPv6/HTTPS/PROXY/force IP version
+ if [ -n "$WGET_SSL" -a $USE_CURL -eq 0 ]; then # except global option use_curl is set to "1"
+ __PROG="$WGET_SSL --hsts-file=/tmp/.wget-hsts -nv -t 1 -O $DATFILE -o $ERRFILE" # non_verbose no_retry outfile errfile
+ # force network/ip to use for communication
+ if [ -n "$bind_network" ]; then
+ local __BINDIP
+ # set correct program to detect IP
+ [ $use_ipv6 -eq 0 ] && __RUNPROG="network_get_ipaddr" || __RUNPROG="network_get_ipaddr6"
+ eval "$__RUNPROG __BINDIP $bind_network" || \
+ write_log 13 "Can not detect local IP using '$__RUNPROG $bind_network' - Error: '$?'"
+ write_log 7 "Force communication via IP '$__BINDIP'"
+ __PROG="$__PROG --bind-address=$__BINDIP"
+ fi
+ # 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=${cacert}"
+ elif [ -n "$cacert" ]; then # it's not a file and not a directory but given
+ 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 '$__URL'" # build final command
+ __PROG="GNU Wget" # reuse for error logging
+
+ # 2nd choice is cURL IPv4/IPv6/HTTPS
+ # libcurl might be compiled without Proxy or HTTPS Support
+ elif [ -n "$CURL" ]; then
+ __PROG="$CURL -RsS -o $DATFILE --stderr $ERRFILE"
+ # check HTTPS support
+ [ -z "$CURL_SSL" -a $use_https -eq 1 ] && \
+ write_log 13 "cURL: libcurl compiled without https support"
+ # force network/interface-device to use for communication
+ if [ -n "$bind_network" ]; then
+ local __DEVICE
+ network_get_physdev __DEVICE $bind_network || \
+ write_log 13 "Can not detect local device using 'network_get_physdev $bind_network' - Error: '$?'"
+ write_log 7 "Force communication via device '$__DEVICE'"
+ __PROG="$__PROG --interface $__DEVICE"
+ fi
+ # 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 $cacert"
+ elif [ -n "$cacert" ]; then # it's not a file and not a directory but given
+ 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="$__PROG --noproxy '*'"
+ elif [ -z "$CURL_PROXY" ]; then
+ # if libcurl has no proxy support and proxy should be used then force ERROR
+ write_log 13 "cURL: libcurl compiled without Proxy support"
+ fi
+
+ __RUNPROG="$__PROG '$__URL'" # build final command
+ __PROG="cURL" # reuse for error logging
+
+ # uclient-fetch possibly with ssl support if /lib/libustream-ssl.so installed
+ elif [ -n "$UCLIENT_FETCH" ]; then
+ # UCLIENT_FETCH_SSL not empty then SSL support available
+ UCLIENT_FETCH_SSL=$(find /lib /usr/lib -name libustream-ssl.so* 2>/dev/null)
+ __PROG="$UCLIENT_FETCH -q -O $DATFILE"
+ # force network/ip not supported
+ [ -n "$__BINDIP" ] && \
+ write_log 14 "uclient-fetch: FORCE binding to specific address not supported"
+ # 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
+ # https possibly not supported
+ [ $use_https -eq 1 -a -z "$UCLIENT_FETCH_SSL" ] && \
+ write_log 14 "uclient-fetch: no HTTPS support! Additional install one of ustream-ssl packages"
+ # proxy support
+ [ -z "$proxy" ] && __PROG="$__PROG -Y off" || __PROG="$__PROG -Y on"
+ # https & certificates
+ if [ $use_https -eq 1 ]; then
+ if [ "$cacert" = "IGNORE" ]; then
+ __PROG="$__PROG --no-check-certificate"
+ elif [ -f "$cacert" ]; then
+ __PROG="$__PROG --ca-certificate=$cacert"
+ elif [ -n "$cacert" ]; then # it's not a file; nothing else supported
+ write_log 14 "No valid certificate file '$cacert' for HTTPS communication"
+ fi
+ fi
+ __RUNPROG="$__PROG '$__URL' 2>$ERRFILE" # build final command
+ __PROG="uclient-fetch" # reuse for error logging
+
+ # Busybox Wget or any other wget in search $PATH (did not support neither IPv6 nor HTTPS)
+ elif [ -n "$WGET" ]; then
+ __PROG="$WGET -q -O $DATFILE"
+ # force network/ip not supported
+ [ -n "$__BINDIP" ] && \
+ write_log 14 "BusyBox Wget: FORCE binding to specific address not supported"
+ # force ip version not supported
+ [ $force_ipversion -eq 1 ] && \
+ write_log 14 "BusyBox Wget: Force connecting to IPv4 or IPv6 addresses not supported"
+ # 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' nor 'uclient-fetch' installed or executable"
+ fi
+
+ while : ; do
+ write_log 7 "#> $__RUNPROG"
+ eval $__RUNPROG # DO transfer
+ __ERR=$? # save error code
+ [ $__ERR -eq 0 ] && return 0 # no error leave
+ [ -n "$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 -gt 1 ] && {
+ # VERBOSE > 1 then NO retry
+ write_log 4 "Transfer failed - Verbose Mode: $VERBOSE - NO retry on error"
+ return 1
+ }
+
+ __CNT=$(( $__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"
+
+ if [ $upd_privateip -eq 0 ]; then
+ # 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\.|^100\.6[4-9]\.|^100\.[7-9][0-9]\.|^100\.1[0-1][0-9]\.|^100\.12[0-7]\.|^127|^169\.254|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-1]\.|^192\.168)")
+ [ $use_ipv6 -eq 1 ] && __IP=$(echo $1 | grep "^[0-9a-eA-E]")
+ else
+ __IP=$(echo $1 | grep -m 1 -o "$IPV4_REGEX") # valid IPv4 or
+ [ -z "$__IP" ] && __IP=$(echo $1 | grep -m 1 -o "$IPV6_REGEX") # IPv6
+ fi
+ [ -z "$__IP" ] && {
+ write_log 3 "No or private or invalid IP '$1' given! Please check your configuration"
+ return 127
+ }
+
+ if [ -n "$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#\[PARAMENC\]#$URL_PENC#g" -e "s#\[PARAMOPT\]#$param_opt#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 $DATFILE)"
+
+ [ -z "$UPD_ANSWER" ] && return 0 # not set then ignore
+
+ grep -i -E "$UPD_ANSWER" $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
+
+ [ $# -ne 1 ] && write_log 12 "Error calling 'get_local_ip()' - wrong number of parameters"
+ write_log 7 "Detect local IP on '$ip_source'"
+
+ while : ; do
+ if [ -n "$ip_network" -a "$ip_source" = "network" ]; then
+ # set correct program
+ network_flush_cache # force re-read data from ubus
+ [ $use_ipv6 -eq 0 ] && __RUNPROG="network_get_ipaddr" \
+ || __RUNPROG="network_get_ipaddr6"
+ eval "$__RUNPROG __DATA $ip_network" || \
+ write_log 13 "Can not detect local IP using $__RUNPROG '$ip_network' - Error: '$?'"
+ [ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected on network '$ip_network'"
+ elif [ -n "$ip_interface" -a "$ip_source" = "interface" ]; then
+ local __DATA4=""; local __DATA6=""
+ if [ -n "$(command -v ip)" ]; then # ip program installed
+ write_log 7 "#> ip -o addr show dev $ip_interface scope global >$DATFILE 2>$ERRFILE"
+ ip -o addr show dev $ip_interface scope global >$DATFILE 2>$ERRFILE
+ __ERR=$?
+ if [ $__ERR -eq 0 ]; then
+ # DATFILE (sample)
+ # 10: l2tp-inet: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1456 qdisc fq_codel state UNKNOWN qlen 3\ link/ppp
+ # 10: l2tp-inet inet 95.30.176.51 peer 95.30.176.1/32 scope global l2tp-inet\ valid_lft forever preferred_lft forever
+ # 5: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000\ link/ether 08:00:27:d0:10:32 brd ff:ff:ff:ff:ff:ff
+ # 5: eth1 inet 172.27.10.128/24 brd 172.27.10.255 scope global eth1\ valid_lft forever preferred_lft forever
+ # 5: eth1 inet 172.55.55.155/24 brd 172.27.10.255 scope global eth1\ valid_lft 12345sec preferred_lft 12345sec
+ # 5: eth1 inet6 2002:b0c7:f326::806b:c629:b8b9:433/128 scope global dynamic \ valid_lft 8026sec preferred_lft 8026sec
+ # 5: eth1 inet6 fd43:5368:6f6d:6500:806b:c629:b8b9:433/128 scope global dynamic \ valid_lft 8026sec preferred_lft 8026sec
+ # 5: eth1 inet6 fd43:5368:6f6d:6500:a00:27ff:fed0:1032/64 scope global dynamic \ valid_lft 14352sec preferred_lft 14352sec
+ # 5: eth1 inet6 2002:b0c7:f326::a00:27ff:fed0:1032/64 scope global dynamic \ valid_lft 14352sec preferred_lft 14352sec
+
+ # remove remove remove replace replace
+ # link inet6 fxxx sec forever=>-1 / => ' ' to separate subnet from ip
+ sed "/link/d; /inet6 f/d; s/sec//g; s/forever/-1/g; s/\// /g" $DATFILE | \
+ awk '{ print $3" "$4" "$NF }' > $ERRFILE # temp reuse ERRFILE
+ # we only need inet? IP prefered time
+
+ local __TIME4=0; local __TIME6=0
+ local __TYP __ADR __TIME
+ while read __TYP __ADR __TIME; do
+ __TIME=${__TIME:-0} # supress shell errors on last (empty) line of DATFILE
+ # IPversion no "-1" record stored - now "-1" record or new time > oldtime
+ [ "$__TYP" = "inet6" -a $__TIME6 -ge 0 -a \( $__TIME -lt 0 -o $__TIME -gt $__TIME6 \) ] && {
+ __DATA6="$__ADR"
+ __TIME6="$__TIME"
+ }
+ [ "$__TYP" = "inet" -a $__TIME4 -ge 0 -a \( $__TIME -lt 0 -o $__TIME -gt $__TIME4 \) ] && {
+ __DATA4="$__ADR"
+ __TIME4="$__TIME"
+ }
+ done < $ERRFILE
+ else
+ write_log 3 "ip Error: '$__ERR'"
+ write_log 7 "$(cat $ERRFILE)" # report error
+ fi
+ else # use deprecated ifconfig
+ write_log 7 "#> ifconfig $ip_interface >$DATFILE 2>$ERRFILE"
+ ifconfig $ip_interface >$DATFILE 2>$ERRFILE
+ __ERR=$?
+ if [ $__ERR -eq 0 ]; then
+ __DATA4=$(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
+ }' $DATFILE
+ )
+ __DATA6=$(awk '
+ /inet6/ && /: [0-9a-eA-E]/ { # Filter IPv6 exclude fxxx
+ # 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
+ }' $DATFILE
+ )
+ else
+ write_log 3 "ifconfig Error: '$__ERR'"
+ write_log 7 "$(cat $ERRFILE)" # report error
+ fi
+ fi
+ [ $use_ipv6 -eq 0 ] && __DATA="$__DATA4" || __DATA="$__DATA6"
+ [ -n "$__DATA" ] && write_log 7 "Local IP '$__DATA' detected on interface '$ip_interface'"
+ elif [ -n "$ip_script" -a "$ip_source" = "script" ]; then
+ 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 $ERRFILE)" # report error
+ fi
+ elif [ -n "$ip_url" -a "$ip_source" = "web" ]; then
+ do_transfer "$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 '$__DATA' detected on web at '$ip_url'"
+ else
+ write_log 12 "Error in 'get_local_ip()' - unhandled ip_source '$ip_source'"
+ fi
+ # valid data found return here
+ [ -n "$__DATA" ] && {
+ eval "$1=\"$__DATA\""
+ return 0
+ }
+
+ [ -n "$LUCI_HELPER" ] && return 1 # no retry if called by LuCI helper script
+
+ write_log 7 "Data detected:"
+ write_log 7 "$(cat $DATFILE)"
+
+ [ $VERBOSE -gt 1 ] && {
+ # VERBOSE > 1 then NO retry
+ write_log 4 "Get local IP via '$ip_source' failed - Verbose Mode: $VERBOSE - NO retry on error"
+ return 1
+ }
+
+ __CNT=$(( $__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 __IP
+ # return codes
+ # 1 no IP detected
+
+ [ $# -lt 1 -o $# -gt 2 ] && write_log 12 "Error calling 'get_registered_ip()' - wrong number of parameters"
+ [ $is_glue -eq 1 -a -z "$BIND_HOST" ] && write_log 14 "Lookup of glue records is only supported using BIND host"
+ write_log 7 "Detect registered/public IP"
+
+ # set correct regular expression
+ [ $use_ipv6 -eq 0 ] && __REGEX="$IPV4_REGEX" || __REGEX="$IPV6_REGEX"
+
+ if [ -n "$BIND_HOST" ]; then
+ __PROG="$BIND_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
+ [ $is_glue -eq 1 ] && __PROG="$__PROG -v" # use verbose output to get additional section
+
+ __RUNPROG="$__PROG $lookup_host $dns_server >$DATFILE 2>$ERRFILE"
+ __PROG="BIND host"
+ elif [ -n "$KNOT_HOST" ]; then
+ __PROG="$KNOT_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 $lookup_host $dns_server >$DATFILE 2>$ERRFILE"
+ __PROG="Knot host"
+ elif [ -n "$DRILL" ]; then
+ __PROG="$DRILL -V0" # drill options name @server type
+ 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" || __PROG="$__PROG -u" # force TCP
+ __PROG="$__PROG $lookup_host"
+ [ -n "$dns_server" ] && __PROG="$__PROG @$dns_server"
+ [ $use_ipv6 -eq 0 ] && __PROG="$__PROG A" || __PROG="$__PROG AAAA"
+
+ __RUNPROG="$__PROG >$DATFILE 2>$ERRFILE"
+ __PROG="drill"
+ elif [ -n "$HOSTIP" ]; then # hostip package installed
+ __PROG="$HOSTIP"
+ [ $force_dnstcp -ne 0 ] && \
+ write_log 14 "hostip - no support for 'DNS over TCP'"
+
+ # is IP given as dns_server ?
+ __IP=$(echo $dns_server | grep -m 1 -o "$IPV4_REGEX")
+ [ -z "$__IP" ] && __IP=$(echo $dns_server | grep -m 1 -o "$IPV6_REGEX")
+
+ # we got NO ip for dns_server, so build command
+ [ -z "$__IP" -a -n "$dns_server" ] && {
+ __IP="\`$HOSTIP"
+ [ $use_ipv6 -eq 1 -a $force_ipversion -eq 1 ] && __IP="$__IP -6"
+ __IP="$__IP $dns_server | grep -m 1 -o"
+ [ $use_ipv6 -eq 1 -a $force_ipversion -eq 1 ] \
+ && __IP="$__IP '$IPV6_REGEX'" \
+ || __IP="$__IP '$IPV4_REGEX'"
+ __IP="$__IP \`"
+ }
+
+ [ $use_ipv6 -eq 1 ] && __PROG="$__PROG -6"
+ [ -n "$dns_server" ] && __PROG="$__PROG -r $__IP"
+ __RUNPROG="$__PROG $lookup_host >$DATFILE 2>$ERRFILE"
+ __PROG="hostip"
+ elif [ -n "$NSLOOKUP" ]; then # last use BusyBox nslookup
+ NSLOOKUP_MUSL=$($(command -v nslookup) localhost 2>&1 | grep -F "(null)") # not empty busybox compiled with musl
+ [ $force_dnstcp -ne 0 ] && \
+ write_log 14 "Busybox nslookup - no support for 'DNS over TCP'"
+ [ -n "$NSLOOKUP_MUSL" -a -n "$dns_server" ] && \
+ write_log 14 "Busybox compiled with musl - nslookup don't support the use of DNS Server"
+ [ $force_ipversion -ne 0 ] && \
+ write_log 5 "Busybox nslookup - no support to 'force IP Version' (ignored)"
+
+ __RUNPROG="$NSLOOKUP $lookup_host $dns_server >$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 $ERRFILE)"
+ else
+ if [ -n "$BIND_HOST" -o -n "$KNOT_HOST" ]; then
+ if [ $is_glue -eq 1 ]; then
+ __DATA=$(cat $DATFILE | grep "^$lookup_host" | grep -om1 "$__REGEX" )
+ else
+ __DATA=$(cat $DATFILE | awk -F "address " '/has/ {print $2; exit}' )
+ fi
+ elif [ -n "$DRILL" ]; then
+ __DATA=$(cat $DATFILE | awk '/^'"$lookup_host"'/ {print $5; exit}' )
+ elif [ -n "$HOSTIP" ]; then
+ __DATA=$(cat $DATFILE | grep -om1 "$__REGEX")
+ elif [ -n "$NSLOOKUP" ]; then
+ __DATA=$(cat $DATFILE | sed -ne "/^Name:/,\$ { s/^Address[0-9 ]\{0,\}: \($__REGEX\).*$/\\1/p }" )
+ fi
+ [ -n "$__DATA" ] && {
+ write_log 7 "Registered IP '$__DATA' detected"
+ [ -z "$IPFILE" ] || echo "$__DATA" > $IPFILE
+ eval "$1=\"$__DATA\"" # valid data found
+ return 0 # leave here
+ }
+ write_log 4 "NO valid IP found"
+ __ERR=127
+ fi
+ [ -z "$IPFILE" ] || echo "" > $IPFILE
+
+ [ -n "$LUCI_HELPER" ] && return $__ERR # no retry if called by LuCI helper script
+ [ -n "$2" ] && return $__ERR # $2 is given -> no retry
+ [ $VERBOSE -gt 1 ] && {
+ # VERBOSE > 1 then NO retry
+ write_log 4 "Get registered/public IP for '$lookup_host' failed - Verbose Mode: $VERBOSE - 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 $retry_count ] && \
+ write_log 14 "Get registered/public IP for '$lookup_host' failed after $retry_count retries"
+
+ write_log 4 "Get registered/public IP for '$lookup_host' 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 '$$' received 'SIGHUP' at $(eval $DATE_PROG)"
+ # reload config via starting the script again
+ /usr/lib/ddns/dynamic_dns_updater.sh -v "0" -S "$__SECTIONID" -- start || true
+ exit 0 ;; # and leave this one
+ 2) write_log 5 "PID '$$' 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 $$) # get my childs (pgrep prints with "newline")
+ IFS=$__NEWLINE_IFS
+ for __PID in $__PIDS; do
+ kill -$1 $__PID # terminate it
+ done
+ IFS=$__OLD_IFS
+
+ # remove out and err file
+ [ -f $DATFILE ] && rm -f $DATFILE
+ [ -f $ERRFILE ] && rm -f $ERRFILE
+
+ # exit with correct handling:
+ # remove trap handling settings and send kill to myself
+ trap - 0 1 2 3 15
+ [ $1 -gt 0 ] && kill -$1 $$
+}
+
+split_FQDN() {
+ # $1 FQDN to split
+ # $2 name of variable to store TLD
+ # $3 name of variable to store (reg)Domain
+ # $4 name of variable to store Host/Subdomain
+
+ [ $# -ne 4 ] && write_log 12 "Error calling 'split_FQDN()' - wrong number of parameters"
+ [ -z "$1" ] && write_log 12 "Error calling 'split_FQDN()' - missing FQDN to split"
+ [ -f $TLDFILE ] || write_log 12 "Error calling 'split_FQDN()' - missing file '$TLDFILE'"
+
+ local _HOST _FDOM _CTLD _FTLD
+ local _SET="$@" # save given function parameters
+
+ local _PAR=$(echo "$1" | tr [A-Z] [a-z] | tr "." " ") # to lower and replace DOT with SPACE
+ set -- $_PAR # set new as function parameters
+ _PAR="" # clear variable for later reuse
+ while [ -n "$1" ] ; do # as long we have parameters
+ _PAR="$1 $_PAR" # invert order of parameters
+ shift
+ done
+ set -- $_PAR # use new as function parameters
+ _PAR="" # clear variable
+
+ while [ -n "$1" ] ; do # as long we have parameters
+ if [ -z "$_CTLD" ]; then # first loop
+ _CTLD="$1" # CURRENT TLD to look at
+ shift
+ else
+ _CTLD="$1.$_CTLD" # Next TLD to look at
+ shift
+ fi
+ # check if TLD exact match in tld_names.dat, save TLD
+ zcat $TLDFILE | grep -E "^$_CTLD$" >/dev/null 2>&1 && {
+ _FTLD="$_CTLD" # save found
+ _FDOM="$1" # save domain next step might be invalid
+ continue
+ }
+ # check if match any "*" in tld_names.dat,
+ zcat $TLDFILE | grep -E "^\*.$_CTLD$" >/dev/null 2>&1 && {
+ [ -z "$1" ] && break # no more data break
+ # check if next level TLD match excludes "!" in tld_names.dat
+ if zcat $TLDFILE | grep -E "^!$1.$_CTLD$" >/dev/null 2>&1 ; then
+ _FTLD="$_CTLD" # Yes
+ else
+ _FTLD="$1.$_CTLD"
+ shift
+ fi
+ _FDOM="$1"; shift
+ }
+ [ -n "$_FTLD" ] && break # we have something valid, break
+ done
+
+ # the leftover parameters are the HOST/SUBDOMAIN
+ while [ -n "$1" ]; do
+ _HOST="$1 $_HOST" # remember we need to invert
+ shift
+ done
+ _HOST=$(echo $_HOST | tr " " ".") # insert DOT
+
+ set -- $_SET # set back parameters from function call
+ [ -n "$_FTLD" ] && {
+ eval "$2=$_FTLD" # set TLD
+ eval "$3=$_FDOM" # set registrable domain
+ eval "$4=$_HOST" # set HOST/SUBDOMAIN
+ return 0
+ }
+ eval "$2=''" # clear TLD
+ eval "$3=''" # clear registrable domain
+ eval "$4=''" # clear HOST/SUBDOMAIN
+ return 1
+}
+
+expand_ipv6() {
+ # Original written for bash by
+ #.Author: Florian Streibelt <florian@f-streibelt.de>
+ # Date: 08.04.2012
+ # License: Public Domain, but please be fair and
+ # attribute the original author(s) and provide
+ # a link to the original source for corrections:
+ #. https://github.com/mutax/IPv6-Address-checks
+
+ # $1 IPv6 to expand
+ # $2 name of variable to store expanded IPv6
+ [ $# -ne 2 ] && write_log 12 "Error calling 'expand_ipv6()' - wrong number of parameters"
+
+ INPUT="$(echo "$1" | tr 'A-F' 'a-f')"
+ [ "$INPUT" = "::" ] && INPUT="::0" # special case ::
+
+ O=""
+
+ while [ "$O" != "$INPUT" ]; do
+ O="$INPUT"
+
+ # fill all words with zeroes
+ INPUT=$( echo "$INPUT" | sed -e 's|:\([0-9a-f]\{3\}\):|:0\1:|g' \
+ -e 's|:\([0-9a-f]\{3\}\)$|:0\1|g' \
+ -e 's|^\([0-9a-f]\{3\}\):|0\1:|g' \
+ -e 's|:\([0-9a-f]\{2\}\):|:00\1:|g' \
+ -e 's|:\([0-9a-f]\{2\}\)$|:00\1|g' \
+ -e 's|^\([0-9a-f]\{2\}\):|00\1:|g' \
+ -e 's|:\([0-9a-f]\):|:000\1:|g' \
+ -e 's|:\([0-9a-f]\)$|:000\1|g' \
+ -e 's|^\([0-9a-f]\):|000\1:|g' )
+
+ done
+
+ # now expand the ::
+ ZEROES=""
+
+ echo "$INPUT" | grep -qs "::"
+ if [ "$?" -eq 0 ]; then
+ GRPS="$( echo "$INPUT" | sed 's|[0-9a-f]||g' | wc -m )"
+ GRPS=$(( GRPS-1 )) # remove carriage return
+ MISSING=$(( 8-GRPS ))
+ while [ $MISSING -gt 0 ]; do
+ ZEROES="$ZEROES:0000"
+ MISSING=$(( MISSING-1 ))
+ done
+
+ # be careful where to place the :
+ INPUT=$( echo "$INPUT" | sed -e 's|\(.\)::\(.\)|\1'$ZEROES':\2|g' \
+ -e 's|\(.\)::$|\1'$ZEROES':0000|g' \
+ -e 's|^::\(.\)|'$ZEROES':0000:\1|g;s|^:||g' )
+ fi
+
+ # an expanded address has 39 chars + CR
+ if [ $(echo $INPUT | wc -m) != 40 ]; then
+ write_log 4 "Error in 'expand_ipv6()' - invalid IPv6 found: '$1' expanded: '$INPUT'"
+ eval "$2='invalid'"
+ return 1
+ fi
+
+ # echo the fully expanded version of the address
+ eval "$2=$INPUT"
+ return 0
+}
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