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1319 lines
46 KiB
1319 lines
46 KiB
#!/bin/sh
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# /usr/lib/ddns/dynamic_dns_functions.sh
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#
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#.Distributed under the terms of the GNU General Public License (GPL) version 2.0
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# Original written by Eric Paul Bishop, January 2008
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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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# extended and partial rewritten
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#.2014-2016 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
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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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VERSION="2.7.5"
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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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LOGFILE="" # logfile - all files are set in dynamic_dns_updater.sh
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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 external programs called
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ERRFILE="" # save stderr output of WGet and other external programs called
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TLDFILE=/usr/lib/ddns/tld_names.dat.gz # TLD file used by split_FQDN
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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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URL_PENC="" # url encoded $param_enc from config file
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SRV_ANSWER="" # Answer given by service on success
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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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# 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 $0)" = "dynamic_dns_lucihelper.sh" ] && LUCI_HELPER="TRUE" || LUCI_HELPER=""
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# Name Server Lookup Programs
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BIND_HOST=$(which host)
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KNOT_HOST=$(which khost)
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DRILL=$(which drill)
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HOSTIP=$(which hostip)
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NSLOOKUP=$(which nslookup)
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NSLOOKUP_MUSL=$($(which nslookup) localhost 2>&1 | grep -F "(null)") # not empty busybox compiled with musl
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# Transfer Programs
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WGET=$(which wget)
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WGET_SSL=$(which wget-ssl)
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CURL=$(which curl)
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# CURL_SSL not empty then SSL support available
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CURL_SSL=$($(which curl) -V 2>/dev/null | grep "Protocols:" | grep -F "https")
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# CURL_PROXY not empty then Proxy support available
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CURL_PROXY=$(find /lib /usr/lib -name libcurl.so* -exec grep -i "all_proxy" {} 2>/dev/null \;)
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UCLIENT_FETCH=$(which uclient-fetch)
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# UCLIENT_FETCH_SSL not empty then SSL support available
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UCLIENT_FETCH_SSL=$(find /lib /usr/lib -name libustream-ssl.so* 2>/dev/null)
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# Global configuration settings
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# allow NON-public IP's
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ALLOW_LOCAL_IP=$(uci -q get ddns.global.allow_local_ip) || ALLOW_LOCAL_IP=0
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# directory to store run information to.
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RUNDIR=$(uci -q get ddns.global.run_dir) || RUNDIR="/var/run/ddns"
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[ -d $RUNDIR ] || mkdir -p -m755 $RUNDIR
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# directory to store log files
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LOGDIR=$(uci -q get ddns.global.log_dir) || LOGDIR="/var/log/ddns"
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[ -d $LOGDIR ] || mkdir -p -m755 $LOGDIR
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# number of lines to before rotate logfile
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LOGLINES=$(uci -q get ddns.global.log_lines) || LOGLINES=250
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LOGLINES=$((LOGLINES + 1)) # correct sed handling
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# format to show date information in log and luci-app-ddns default ISO 8601 format
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DATE_FORMAT=$(uci -q get ddns.global.date_format) || DATE_FORMAT="%F %R"
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DATE_PROG="date +'$DATE_FORMAT'"
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# USE_CURL if GNU Wget and cURL installed normally Wget is used by do_transfer()
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# to change this use global option use_curl '1'
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USE_CURL=$(uci -q get ddns.global.use_curl) || USE_CURL=0 # read config
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[ -n "$CURL" ] || USE_CURL=0 # check for cURL
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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/95-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/95-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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[ $__LEVEL -eq 7 ] && return # no syslog for debug messages
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__CMD=$(echo -e "$__CMD" | tr -d '\n' | tr '\t' ' ') # remove \n \t chars
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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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# $3 Name of Variable to store service answer to
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get_service_data() {
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[ $# -ne 3 ] && 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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# workaround with variables; pipe create subshell with no give back of variable content
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mkfifo pipe_$$
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# only grep without # or whitespace at linestart | remove "
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# grep -v -E "(^#|^[[:space:]]*$)" $__FILE | sed -e s/\"//g > pipe_$$ &
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sed '/^#/d/^[ \t]*$/ds/\"//g' $__FILE > pipe_$$ &
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while read __SERVICE __DATA __ANSWER; do
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if [ "$__SERVICE" = "$service_name" ]; then
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# check if URL or SCRIPT is given
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__URL=$(echo "$__DATA" | grep "^http")
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[ -z "$__URL" ] && __SCRIPT="/usr/lib/ddns/$__DATA"
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eval "$1=\"$__URL\""
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eval "$2=\"$__SCRIPT\""
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eval "$3=\"$__ANSWER\""
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rm pipe_$$
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return 0
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fi
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done < pipe_$$
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rm pipe_$$
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eval "$1=\"\"" # no service match clear variables
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eval "$2=\"\""
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eval "$3=\"\""
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return 1
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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 following 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 reformatting
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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 immediately (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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# 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
|
|
# timeout command working as well as this does.
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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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|
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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="$1" ;;
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*)
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# unforced end of user options
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break ;;
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esac
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shift # next option
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done
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|
# run main command in backgrounds and get its pid
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|
"$@" &
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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
|
|
wait $command_pid
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|
status=$?
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|
|
|
# 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
|
|
}
|
|
|
|
# verify given host and port is connectable
|
|
# $1 Host/IP to verify
|
|
# $2 Port to verify
|
|
verify_host_port() {
|
|
local __HOST=$1
|
|
local __PORT=$2
|
|
local __NC=$(which nc)
|
|
local __NCEXT=$($(which 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 "$KNOT_HOST" ]; then # use BIND host or Knot host if installed
|
|
__IPV4=$(cat $DATFILE | awk -F "address " '/has address/ {print $2; exit}' )
|
|
__IPV6=$(cat $DATFILE | awk -F "address " '/has IPv6/ {print $2; exit}' )
|
|
elif [ -n "$DRILL" ]; then # use drill if installed
|
|
__IPV4=$(cat $DATFILE | awk '/^'"$lookup_host"'/ {print $5}' | grep -m 1 -o "$IPV4_REGEX")
|
|
__IPV6=$(cat $DATFILE | awk '/^'"$lookup_host"'/ {print $5}' | grep -m 1 -o "$IPV6_REGEX")
|
|
elif [ -n "$HOSTIP" ]; then # use hostip if installed
|
|
__IPV4=$(cat $DATFILE | grep -m 1 -o "$IPV4_REGEX")
|
|
__IPV6=$(cat $DATFILE | grep -m 1 -o "$IPV6_REGEX")
|
|
else # use BusyBox nslookup
|
|
__IPV4=$(cat $DATFILE | sed -ne "/^Name:/,\$ { s/^Address[0-9 ]\{0,\}: \($IPV4_REGEX\).*$/\\1/p }")
|
|
__IPV6=$(cat $DATFILE | sed -ne "/^Name:/,\$ { s/^Address[0-9 ]\{0,\}: \($IPV6_REGEX\).*$/\\1/p }")
|
|
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 ] && {
|
|
[ $LUCI_HELPER ] && return 4
|
|
write_log 14 "Verify host Error '4' - Forced IP Version IPv$__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 [ $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
|
|
}
|
|
|
|
# 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" ] && {
|
|
[ $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
|
|
|
|
[ $# -ne 1 ] && write_log 12 "Error in 'do_transfer()' - wrong number of parameters"
|
|
|
|
# lets prefer GNU Wget because it does all for us - IPv4/IPv6/HTTPS/PROXY/force IP version
|
|
if [ -n "$WGET_SSL" -a $USE_CURL -eq 0 ]; then # except global option use_curl is set to "1"
|
|
__PROG="$WGET_SSL -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 "$UCLIENT_FETCH" ]; then
|
|
__PROG="$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
|
|
[ $LUCI_HELPER ] && return 1 # no retry if called by LuCI helper script
|
|
|
|
write_log 3 "$__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"
|
|
|
|
if [ $ALLOW_LOCAL_IP -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 $DATFILE)"
|
|
|
|
[ -z "$SRV_ANSWER" ] && return 0 # not set then ignore
|
|
|
|
grep -i -E "$SRV_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
|
|
case $ip_source in
|
|
network)
|
|
# set correct program
|
|
[ $use_ipv6 -eq 0 ] && __RUNPROG="network_get_ipaddr" \
|
|
|| __RUNPROG="network_get_ipaddr6"
|
|
eval "$__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'"
|
|
;;
|
|
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]/ { # 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
|
|
}' $DATFILE
|
|
)
|
|
fi
|
|
[ -n "$__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 '$__DATA' detected on web at '$ip_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 __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
|
|
[ $force_dnstcp -ne 0 ] && \
|
|
write_log 14 "Busybox nslookup - no support for 'DNS over TCP'"
|
|
[ -n "$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" ]; then
|
|
if [ $is_glue -eq 1 ]; then
|
|
__DATA=$(cat $DATFILE | grep "^$lookup_host" | grep -m 1 -o "$__REGEX" )
|
|
else
|
|
__DATA=$(cat $DATFILE | awk -F "address " '/has/ {print $2; exit}' )
|
|
fi
|
|
elif [ -n "$KNOT_HOST" ]; then
|
|
__DATA=$(cat $DATFILE | awk -F "address " '/has/ {print $2; exit}' )
|
|
elif [ -n "$DRILL" ]; then
|
|
__DATA=$(cat $DATFILE | awk '/^'"$lookup_host"'/ {print $5; exit}' )
|
|
elif [ -n "$HOSTIP" ]; then
|
|
__DATA=$(cat $DATFILE | grep -m 1 -o "$__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"
|
|
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
|
|
[ $VERBOSE_MODE -gt 1 ] && {
|
|
# VERBOSE_MODE > 1 then NO retry
|
|
write_log 4 "Get registered/public IP for '$lookup_host' 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 $retry_count ] && \
|
|
write_log 14 "Get registered/public IP for '$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 '$$' received 'SIGHUP' at $(eval $DATE_PROG)"
|
|
# reload config via starting the script again
|
|
eval "/usr/lib/ddns/dynamic_dns_updater.sh $SECTION_ID $VERBOSE_MODE &"
|
|
exit 0 ;; # and leave this one
|
|
2) write_log 5 "PID '$$' 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 $$) # get my childs (pgrep prints with "newline")
|
|
IFS=$__NEWLINE_IFS
|
|
for __PID in $__PIDS; do
|
|
kill -$1 $__PID # terminate it
|
|
done
|
|
IFS=$__OLD_IFS
|
|
|
|
# remove out and err file
|
|
[ -f $DATFILE ] && rm -f $DATFILE
|
|
[ -f $ERRFILE ] && rm -f $ERRFILE
|
|
|
|
# exit with correct handling:
|
|
# remove trap handling settings and send kill to myself
|
|
trap - 0 1 2 3 15
|
|
[ $1 -gt 0 ] && kill -$1 $$
|
|
}
|
|
|
|
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
|
|
}
|