8a9124dfc0
Changed the verify of DNS server and proxy at script start to retry the verify if there are connection problems during verify plus some minor changes. Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
774 lines
26 KiB
Bash
774 lines
26 KiB
Bash
#!/bin/sh
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# /usr/lib/ddns/dynamic_dns_functions.sh
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#
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# Original written by Eric Paul Bishop, January 2008
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# Distributed under the terms of the GNU General Public License (GPL) version 2.0
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# (Loosely) based on the script on the one posted by exobyte in the forums here:
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# http://forum.openwrt.org/viewtopic.php?id=14040
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#
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# extended and partial rewritten in August 2014
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# by Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
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# to support:
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# - IPv6 DDNS services
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# - setting DNS Server to retrieve current IP including TCP transport
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# - Proxy Server to send out updates or retrieving WEB based IP detection
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# - force_interval=0 to run once (usefull for cron jobs etc.)
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# - the usage of BIND's host instead of BusyBox's nslookup if installed (DNS via TCP)
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# - extended Verbose Mode and log file support for better error detection
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#
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# function __timeout
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# copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
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# @author Anthony Thyssen 6 April 2011
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#
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# variables in small chars are read from /etc/config/ddns
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# variables in big chars are defined inside these scripts as global vars
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# variables in big chars beginning with "__" are local defined inside functions only
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#set -vx #script debugger
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. /lib/functions.sh
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. /lib/functions/network.sh
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# GLOBAL VARIABLES #
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SECTION_ID="" # hold config's section name
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VERBOSE_MODE=1 # default mode is log to console, but easily changed with parameter
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LUCI_HELPER="" # set by dynamic_dns_lucihelper.sh, if filled supress all error logging
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PIDFILE="" # pid file
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UPDFILE="" # store UPTIME of last update
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# directory to store run information to.
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RUNDIR=$(uci -q get ddns.global.run_dir) || RUNDIR="/var/run/ddns"
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# NEW # directory to store log files
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LOGDIR=$(uci -q get ddns.global.log_dir) || LOGDIR="/var/log/ddns"
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LOGFILE="" # NEW # logfile can be enabled as new option
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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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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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OLD_PID=0 # Holds the PID of already running process for the same config section
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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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ERR_LAST=0 # used to save $? return code of program and function calls
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ERR_LOCAL_IP=0 # error counter on getting local ip
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ERR_REG_IP=0 # error counter on getting DNS registered ip
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ERR_SEND=0 # error counter on sending update to DNS provider
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ERR_UPDATE=0 # error counter on different local and registered ip
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ERR_VERIFY=0 # error counter verifying proxy- and dns-servers
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# format to show date information in log and luci-app-ddns default ISO 8601 format
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DATE_FORMAT=$(uci -q get ddns.global.date_format) || DATE_FORMAT="%F %R"
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DATE_PROG="date +'$DATE_FORMAT'"
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# regular expression to detect IPv4 / IPv6
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# IPv4 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x "." 0-9 1-3x
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IPV4_REGEX="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
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# IPv6 ( ( 0-9a-f 1-4char ":") min 1x) ( ( 0-9a-f 1-4char )optional) ( (":" 0-9a-f 1-4char ) min 1x)
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IPV6_REGEX="\(\([0-9A-Fa-f]\{1,4\}:\)\{1,\}\)\(\([0-9A-Fa-f]\{1,4\}\)\{0,1\}\)\(\(:[0-9A-Fa-f]\{1,4\}\)\{1,\}\)"
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# 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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# 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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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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config_cb()
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{
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# only look for section type "service", ignore everything else
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[ "$1" = "service" ] && __SECTIONS="$__SECTIONS $2"
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}
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config_load "ddns"
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for __SECTIONID in $__SECTIONS
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do
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config_get __IFACE "$__SECTIONID" interface "wan"
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[ -z "$__EVENTIF" -o "$__IFACE" = "$__EVENTIF" ] || continue
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/usr/lib/ddns/dynamic_dns_updater.sh $__SECTIONID 0 > /dev/null 2>&1 &
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done
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}
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verbose_echo()
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{
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[ -n "$LUCI_HELPER" ] && return # nothing to report when used by LuCI helper script
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[ $VERBOSE_MODE -gt 0 ] && echo -e " $*"
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if [ ${use_logfile:-0} -eq 1 -o $VERBOSE_MODE -gt 1 ]; then
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[ -d $LOGDIR ] || mkdir -p -m 755 $LOGDIR
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echo -e " $*" >> $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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return
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}
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syslog_info(){
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[ $use_syslog -eq 1 ] && logger -p user.info -t ddns-scripts[$$] "$SECTION_ID: $*"
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return
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}
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syslog_notice(){
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[ $use_syslog -ge 1 -a $use_syslog -le 2 ] && logger -p user.notice -t ddns-scripts[$$] "$SECTION_ID: $*"
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return
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}
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syslog_warn(){
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[ $use_syslog -ge 1 -a $use_syslog -le 3 ] && logger -p user.warn -t ddns-scripts[$$] "$SECTION_ID: $*"
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return
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}
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syslog_err(){
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[ $use_syslog -ge 1 ] && logger -p user.err -t ddns-scripts[$$] "$SECTION_ID: $*"
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return
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}
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critical_error() {
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[ -n "$LUCI_HELPER" ] && return # nothing to report when used by LuCI helper script
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verbose_echo "\n CRITICAL ERROR =: $* - EXITING\n"
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[ $VERBOSE_MODE -eq 0 ] && echo -e "\n$SECTION_ID: CRITICAL ERROR - $* - EXITING\n"
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logger -t ddns-scripts[$$] -p user.crit "$SECTION_ID: CRITICAL ERROR - $* - EXITING"
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exit 1 # critical error -> leave here
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}
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# replace all special chars to their %hex value
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# used for USERNAME and PASSWORD in update_url
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# unchanged: "-"(minus) "_"(underscore) "."(dot) "~"(tilde)
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# to verify: "'"(single quote) '"'(double quote) # because shell delimiter
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# "$"(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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__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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get_service_data() {
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# $1 Name of Variable to store url to
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# $2 Name of Variable to store script to
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local __LINE __FILE __NAME __URL __SERVICES __DATA
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local __SCRIPT=""
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local __OLD_IFS=$IFS
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local __NEWLINE_IFS='
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' #__NEWLINE_IFS
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__FILE="/usr/lib/ddns/services" # IPv4
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[ $use_ipv6 -ne 0 ] && __FILE="/usr/lib/ddns/services_ipv6" # IPv6
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#remove any lines not containing data, and then make sure fields are enclosed in double quotes
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__SERVICES=$(cat $__FILE | grep "^[\t ]*[^#]" | \
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awk ' gsub("\x27", "\"") { if ($1~/^[^\"]*$/) $1="\""$1"\"" }; { if ( $NF~/^[^\"]*$/) $NF="\""$NF"\"" }; { print $0 }')
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IFS=$__NEWLINE_IFS
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for __LINE in $__SERVICES
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do
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#grep out proper parts of data and use echo to remove quotes
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__NAME=$(echo $__LINE | grep -o "^[\t ]*\"[^\"]*\"" | xargs -r -n1 echo)
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__DATA=$(echo $__LINE | grep -o "\"[^\"]*\"[\t ]*$" | xargs -r -n1 echo)
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if [ "$__NAME" = "$service_name" ]; then
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break # found so leave for loop
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fi
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done
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IFS=$__OLD_IFS
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# check is URL or SCRIPT is given
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__URL=$(echo "$__DATA" | grep "^http:")
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[ -z "$__URL" ] && __SCRIPT="/usr/lib/ddns/$__DATA"
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eval "$1='$__URL'"
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eval "$2='$__SCRIPT'"
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return 0
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}
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get_seconds() {
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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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case "$3" in
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"days" ) eval "$1=$(( $2 * 86400 ))";;
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"hours" ) eval "$1=$(( $2 * 3600 ))";;
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"minutes" ) eval "$1=$(( $2 * 60 ))";;
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* ) eval "$1=$2";;
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esac
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return 0
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}
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__timeout() {
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# copied from http://www.ict.griffith.edu.au/anthony/software/timeout.sh
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# only did the folloing changes
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# - commented out "#!/bin/bash" and usage section
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# - replace exit by return for usage as function
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# - some reformating
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#
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# timeout [-SIG] time [--] command args...
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#
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# Run the given command until completion, but kill it if it runs too long.
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# Specifically designed to exit immediatally (no sleep interval) and clean up
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# nicely without messages or leaving any extra processes when finished.
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#
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# Example use
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# timeout 5 countdown
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#
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###
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#
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# Based on notes in my "Shell Script Hints", section "Command Timeout"
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# http://www.ict.griffith.edu.au/~anthony/info/shell/script.hints
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#
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# This script uses a lot of tricks to terminate both the background command,
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# the timeout script, and even the sleep process. It also includes trap
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# commands to prevent sub-shells reporting expected "Termination Errors".
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#
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# It took years of occasional trials, errors and testing to get a pure bash
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# timeout command working as well as this does.
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#
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###
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#
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# Anthony Thyssen 6 April 2011
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#
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# PROGNAME=$(type $0 | awk '{print $3}') # search for executable on path
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# PROGDIR=$(dirname $PROGNAME) # extract directory of program
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# PROGNAME=$(basename $PROGNAME) # base name of program
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# output the script comments as docs
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# Usage() {
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# echo >&2 "$PROGNAME:" "$@"
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# sed >&2 -n '/^###/q; /^#/!q; s/^#//; s/^ //; 3s/^/Usage: /; 2,$ p' "$PROGDIR/$PROGNAME"
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# exit 10;
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# }
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SIG=-TERM
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while [ $# -gt 0 ]; do
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case "$1" in
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--)
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# forced end of user options
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shift;
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break ;;
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# -\?|--help|--doc*)
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# Usage ;;
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[0-9]*)
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TIMEOUT="$1" ;;
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-*)
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SIG="$1" ;;
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*)
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# unforced end of user options
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break ;;
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esac
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shift # next option
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done
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# run main command in backgrouds and get its pid
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"$@" &
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command_pid=$!
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# timeout sub-process abort countdown after ABORT seconds! also backgrounded
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sleep_pid=0
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(
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# cleanup sleep process
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trap 'kill -TERM $sleep_pid; return 1' 1 2 3 15
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# sleep timeout period in background
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sleep $TIMEOUT &
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sleep_pid=$!
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wait $sleep_pid
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# Abort the command
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kill $SIG $command_pid >/dev/null 2>&1
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return 1
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) &
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timeout_pid=$!
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# Wait for main command to finished or be timed out
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wait $command_pid
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status=$?
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# Clean up timeout sub-shell - if it is still running!
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kill $timeout_pid 2>/dev/null
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wait $timeout_pid 2>/dev/null
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# Uncomment to check if a LONG sleep still running (no sleep should be)
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# sleep 1
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# echo "-----------"
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# /bin/ps j # uncomment to show if abort "sleep" is still sleeping
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return $status
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}
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__verify_host_port() {
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# $1 Host/IP to verify
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# $2 Port to verify
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local __HOST=$1
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local __PORT=$2
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local __TMP __IP __IPV4 __IPV6 __RUNPROG __ERRPROG __ERR
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# return codes
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# 1 system specific error
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# 2 nslookup error
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# 3 nc (netcat) error
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# 4 unmatched IP version
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__RUNPROG="nslookup $__HOST 2>/dev/null"
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__ERRPROG="nslookup $__HOST 2>&1"
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verbose_echo " resolver prog =: '$__RUNPROG'"
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__TMP=$(eval $__RUNPROG) # test if nslookup runs without errors
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__ERR=$?
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# command error
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[ $__ERR -gt 0 ] && {
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verbose_echo "\n!!!!!!!!! ERROR =: BusyBox nslookup Error '$__ERR'\n$(eval $__ERRPROG)\n"
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syslog_err "DNS Resolver Error - BusyBox nslookup Error '$__ERR'"
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return 2
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} || {
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# we need to run twice because multi-line output needs to be directly piped to grep because
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# pipe returns return code of last prog in pipe but we need errors from nslookup command
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__IPV4=$(eval $__RUNPROG | sed -ne "3,\$ { s/^Address [0-9]*: \($IPV4_REGEX\).*$/\\1/p }")
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__IPV6=$(eval $__RUNPROG | sed -ne "3,\$ { s/^Address [0-9]*: \($IPv6_REGEX\).*$/\\1/p }")
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}
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# check IP version if forced
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if [ $force_ipversion -ne 0 ]; then
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__ERR=0
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[ $use_ipv6 -eq 0 -a -z "$__IPV4" ] && __ERR=4
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[ $use_ipv6 -eq 1 -a -z "$__IPV6" ] && __ERR=6
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[ $__ERR -gt 0 ] && critical_error "Invalid host: Error '4' - Force IP Version IPv$__ERR not supported"
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fi
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# verify nc command
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# busybox nc compiled without -l option "NO OPT l!" -> critical error
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nc --help 2>&1 | grep -iq "NO OPT l!" && \
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critical_error "Busybox nc: netcat compiled without -l option, error 'NO OPT l!'"
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# busybox nc compiled with extensions
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nc --help 2>&1 | grep -q "\-w" && __NCEXT="TRUE"
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# connectivity test
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# run busybox nc to HOST PORT
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# busybox might be compiled with "FEATURE_PREFER_IPV4_ADDRESS=n"
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# then nc will try to connect via IPv6 if there is an IPv6 availible for host
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# not worring if there is an IPv6 wan address
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# so if not "forced_ipversion" to use ipv6 then connect test via ipv4 if availible
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[ $force_ipversion -ne 0 -a $use_ipv6 -ne 0 -o -z "$__IPV4" ] && {
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# force IPv6
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__IP=$__IPV6
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} || __IP=$__IPV4
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if [ -n "$__NCEXT" ]; then # nc compiled with extensions (timeout support)
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__RUNPROG="nc -w 1 $__IP $__PORT </dev/null >/dev/null 2>&1"
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__ERRPROG="nc -vw 1 $__IP $__PORT </dev/null 2>&1"
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verbose_echo " connect prog =: '$__RUNPROG'"
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eval $__RUNPROG
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__ERR=$?
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[ $__ERR -eq 0 ] && return 0
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verbose_echo "\n!!!!!!!!! ERROR =: BusyBox nc Error '$__ERR'\n$(eval $__ERRPROG)\n"
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syslog_err "host verify Error - BusyBox nc Error '$__ERR'"
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return 3
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else # nc compiled without extensions (no timeout support)
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__RUNPROG="__timeout 2 -- nc $__IP $__PORT </dev/null >/dev/null 2>&1"
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verbose_echo " connect prog =: '$__RUNPROG'"
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eval $__RUNPROG
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__ERR=$?
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[ $__ERR -eq 0 ] && return 0
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verbose_echo "\n!!!!!!!!! ERROR =: BusyBox nc Error '$__ERR' (timeout)"
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syslog_err "host verify Error - BusyBox nc Error '$__ERR' (timeout)"
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return 3
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fi
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}
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verify_dns() {
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# $1 DNS server to verify
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# we need DNS server to verify otherwise exit with ERROR 1
|
|
[ -z "$1" ] && return 1
|
|
|
|
# DNS uses port 53
|
|
__verify_host_port "$1" "53"
|
|
}
|
|
|
|
verify_proxy() {
|
|
# $1 Proxy-String to verify
|
|
# 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
|
|
|
|
# we need Proxy-Sting to verify otherwise exit with ERROR 1
|
|
[ -z "$1" ] && return 1
|
|
|
|
# try to split user:password "@" host:port
|
|
__TMP=$(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 $2}')
|
|
fi
|
|
# No Port detected
|
|
[ -z "$__PORT" ] && critical_error "Invalid Proxy server Error '5' - proxy port missing"
|
|
|
|
__verify_host_port "$__HOST" "$__PORT"
|
|
}
|
|
|
|
__do_transfer() {
|
|
# $1 # Variable to store Answer of transfer
|
|
# $2 # URL to use
|
|
local __URL="$2"
|
|
local __ERR=0
|
|
local __PROG __RUNPROG __ERRPROG __DATA
|
|
|
|
# lets prefer GNU Wget because it does all for us - IPv4/IPv6/HTTPS/PROXY/force IP version
|
|
if /usr/bin/wget --version 2>&1 | grep -q "\+ssl"; then
|
|
__PROG="/usr/bin/wget -t 2 -O -" # standard output only 2 retrys on error
|
|
# force ip version to use
|
|
if [ $force_ipversion -eq 1 ]; then
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6" # force IPv4/IPv6
|
|
fi
|
|
# set certificate parameters
|
|
if [ $use_https -eq 1 ]; then
|
|
if [ "$cacert" = "IGNORE" ]; then # idea from Ticket #15327 to ignore server cert
|
|
__PROG="$__PROG --no-check-certificate"
|
|
elif [ -f "$cacert" ]; then
|
|
__PROG="$__PROG --ca-certificate=${cacert}"
|
|
elif [ -d "$cacert" ]; then
|
|
__PROG="$__PROG --ca-directory=${cacert}"
|
|
else # exit here because it makes no sense to start loop
|
|
critical_error "Wget: No valid certificate(s) found for running HTTPS"
|
|
fi
|
|
fi
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
[ -z "$proxy" ] && __PROG="$__PROG --no-proxy"
|
|
|
|
__RUNPROG="$__PROG -q '$__URL' 2>/dev/null" # do transfer with "-q" to suppress not needed output
|
|
__ERRPROG="$__PROG -d '$__URL' 2>&1" # do transfer with "-d" for debug mode
|
|
verbose_echo " transfer prog =: $__RUNPROG"
|
|
__DATA=$(eval $__RUNPROG)
|
|
__ERR=$?
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: GNU Wget Error '$__ERR'\n$(eval $__ERRPROG)\n"
|
|
syslog_err "Communication Error - GNU Wget Error: '$__ERR'"
|
|
return 1
|
|
}
|
|
|
|
# 2nd choice is cURL IPv4/IPv6/HTTPS
|
|
# libcurl might be compiled without Proxy Support (default in trunk)
|
|
elif [ -x /usr/bin/curl ]; then
|
|
__PROG="/usr/bin/curl"
|
|
# force ip version to use
|
|
if [ $force_ipversion -eq 1 ]; then
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6" # force IPv4/IPv6
|
|
fi
|
|
# set certificate parameters
|
|
if [ $use_https -eq 1 ]; then
|
|
if [ "$cacert" = "IGNORE" ]; then # idea from Ticket #15327 to ignore server cert
|
|
__PROG="$__PROG --insecure" # but not empty better to use "IGNORE"
|
|
elif [ -f "$cacert" ]; then
|
|
__PROG="$__PROG --cacert $cacert"
|
|
elif [ -d "$cacert" ]; then
|
|
__PROG="$__PROG --capath $cacert"
|
|
else # exit here because it makes no sense to start loop
|
|
critical_error "cURL: No valid certificate(s) found for running HTTPS"
|
|
fi
|
|
fi
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
# or check if libcurl compiled with proxy support
|
|
if [ -z "$proxy" ]; then
|
|
__PROG="$__PROG --noproxy '*'"
|
|
else
|
|
# if libcurl has no proxy support and proxy should be used then force ERROR
|
|
# libcurl currently no proxy support by default
|
|
grep -iq all_proxy /usr/lib/libcurl.so* || \
|
|
critical_error "cURL: libcurl compiled without Proxy support"
|
|
fi
|
|
|
|
__RUNPROG="$__PROG -q '$__URL' 2>/dev/null" # do transfer with "-s" to suppress not needed output
|
|
__ERRPROG="$__PROG -v '$__URL' 2>&1" # do transfer with "-v" for verbose mode
|
|
verbose_echo " transfer prog =: $__RUNPROG"
|
|
__DATA=$(eval $__RUNPROG)
|
|
__ERR=$?
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: cURL Error '$__ERR'\n$(eval $__ERRPROG)\n"
|
|
syslog_err "Communication Error - cURL Error: '$__ERR'"
|
|
return 1
|
|
}
|
|
|
|
# busybox Wget (did not support neither IPv6 nor HTTPS)
|
|
elif [ -x /usr/bin/wget ]; then
|
|
__PROG="/usr/bin/wget -O -"
|
|
# force ip version not supported
|
|
[ $force_ipversion -eq 1 ] && \
|
|
critical_error "BusyBox Wget: can not force IP version to use"
|
|
# https not supported
|
|
[ $use_https -eq 1 ] && \
|
|
critical_error "BusyBox Wget: no HTTPS support"
|
|
# disable proxy if no set (there might be .wgetrc or .curlrc or wrong environment set)
|
|
[ -z "$proxy" ] && __PROG="$__PROG -Y off"
|
|
|
|
__RUNPROG="$__PROG -q '$__URL' 2>/dev/null" # do transfer with "-q" to suppress not needed output
|
|
__ERRPROG="$__PROG '$__URL' 2>&1"
|
|
verbose_echo " transfer prog =: $__RUNPROG"
|
|
__DATA=$(eval $__RUNPROG)
|
|
__ERR=$?
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: BusyBox Wget Error '$__ERR'\n$(eval $__ERRPROG)\n"
|
|
syslog_err "Communication Error - BusyBox Wget Error: '$__ERR'"
|
|
return 1
|
|
}
|
|
|
|
else
|
|
critical_error "Program not found - Neither 'Wget' nor 'cURL' installed or executable"
|
|
fi
|
|
|
|
eval "$1='$__DATA'"
|
|
return 0
|
|
}
|
|
|
|
send_update() {
|
|
# $1 # IP to set at DDNS service provider
|
|
local __IP
|
|
|
|
# verify given IP / no private IPv4's / no IPv6 addr starting with fxxx of with ":"
|
|
[ $use_ipv6 -eq 0 ] && __IP=$(echo $1 | grep -v -E "(^0|^10\.|^127|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-1]\.|^192\.168)")
|
|
[ $use_ipv6 -eq 1 ] && __IP=$(echo $1 | grep "^[0-9a-eA-E]")
|
|
[ -z "$__IP" ] && critical_error "Private or invalid or no IP '$1' given"
|
|
|
|
if [ -n "$update_script" ]; then
|
|
verbose_echo " update =: parsing script '$update_script'"
|
|
. $update_script
|
|
else
|
|
local __URL __ANSWER __ERR __USER __PASS
|
|
|
|
# do replaces in URL
|
|
__urlencode __USER "$username" # encode username, might be email or something like this
|
|
__urlencode __PASS "$password" # encode password, might have special chars for security reason
|
|
__URL=$(echo $update_url | sed -e "s#\[USERNAME\]#$__USER#g" -e "s#\[PASSWORD\]#$__PASS#g" \
|
|
-e "s#\[DOMAIN\]#$domain#g" -e "s#\[IP\]#$__IP#g")
|
|
[ $use_https -ne 0 ] && __URL=$(echo $__URL | sed -e 's#^http:#https:#')
|
|
|
|
__do_transfer __ANSWER "$__URL"
|
|
__ERR=$?
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: Error sending update to DDNS Provider\n"
|
|
return 1
|
|
}
|
|
verbose_echo " update send =: DDNS Provider answered\n$__ANSWER"
|
|
return 0
|
|
fi
|
|
}
|
|
|
|
get_local_ip () {
|
|
# $1 Name of Variable to store local IP (LOCAL_IP)
|
|
local __RUNPROG __IP __URL __ANSWER
|
|
|
|
case $ip_source in
|
|
network )
|
|
# set correct program
|
|
[ $use_ipv6 -eq 0 ] && __RUNPROG="network_get_ipaddr" \
|
|
|| __RUNPROG="network_get_ipaddr6"
|
|
$__RUNPROG __IP "$ip_network"
|
|
verbose_echo " local ip =: '$__IP' detected on network '$ip_network'"
|
|
;;
|
|
interface )
|
|
if [ $use_ipv6 -eq 0 ]; then
|
|
__IP=$(ifconfig $ip_interface | 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 $1; # print IPv4 addr
|
|
}'
|
|
)
|
|
else
|
|
__IP=$(ifconfig $ip_interface | awk '
|
|
/inet6/ && /: [0-9a-eA-E]/ && !/\/128/ { # Filter IPv6 exclude fxxx and /128 prefix
|
|
# inet6 addr: 2001:db8::xxxx:xxxx/32 Scope:Global
|
|
FS="/"; # separator "/"
|
|
$0=$0; # reread to activate separator
|
|
$2=""; # remove everything behind "/"
|
|
FS=" "; # set back separator to default " "
|
|
$0=$0; # reread to activate separator
|
|
print $3; # print IPv6 addr
|
|
}'
|
|
)
|
|
fi
|
|
verbose_echo " local ip =: '$__IP' detected on interface '$ip_interface'"
|
|
;;
|
|
script )
|
|
# get ip from script
|
|
__IP=$($ip_script)
|
|
verbose_echo " local ip =: '$__IP' detected via script '$ip_script'"
|
|
;;
|
|
* )
|
|
for __URL in $ip_url; do
|
|
__do_transfer __ANSWER "$__URL"
|
|
[ -n "$__IP" ] && break # Answer detected, leave for loop
|
|
done
|
|
# use correct regular expression
|
|
[ $use_ipv6 -eq 0 ] \
|
|
&& __IP=$(echo "$__ANSWER" | grep -m 1 -o "$IPV4_REGEX") \
|
|
|| __IP=$(echo "$__ANSWER" | grep -m 1 -o "$IPV6_REGEX")
|
|
verbose_echo " local ip =: '$__IP' detected via web at '$__URL'"
|
|
;;
|
|
esac
|
|
|
|
# if NO IP was found
|
|
[ -z "$__IP" ] && return 1
|
|
|
|
eval "$1='$__IP'"
|
|
return 0
|
|
}
|
|
|
|
get_registered_ip() {
|
|
# $1 Name of Variable to store public IP (REGISTERED_IP)
|
|
local __IP __REGEX __PROG __RUNPROG __ERRPROG __ERR
|
|
# return codes
|
|
# 1 no IP detected
|
|
|
|
# set correct regular expression
|
|
[ $use_ipv6 -eq 0 ] && __REGEX="$IPV4_REGEX" || __REGEX="$IPV6_REGEX"
|
|
|
|
if [ -x /usr/bin/host ]; then # otherwise try to use BIND host
|
|
__PROG="/usr/bin/host"
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -t A" || __PROG="$__PROG -t AAAA"
|
|
if [ $force_ipversion -eq 1 ]; then # force IP version
|
|
[ $use_ipv6 -eq 0 ] && __PROG="$__PROG -4" || __PROG="$__PROG -6"
|
|
fi
|
|
[ $force_dnstcp -eq 1 ] && __PROG="$__PROG -T" # force TCP
|
|
|
|
__RUNPROG="$__PROG $domain $dns_server 2>/dev/null"
|
|
__ERRPROG="$__PROG -v $domain $dns_server 2>&1"
|
|
verbose_echo " resolver prog =: $__RUNPROG"
|
|
__IP=$(eval $__RUNPROG)
|
|
__ERR=$?
|
|
# command error
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: BIND host Error '$__ERR'\n$(eval $__ERRPROG)\n"
|
|
syslog_err "DNS Resolver Error - BIND host Error: '$__ERR'"
|
|
return 1
|
|
} || {
|
|
# we need to run twice because multi-line output needs to be directly piped to grep because
|
|
# pipe returns return code of last prog in pipe but we need errors from host command
|
|
__IP=$(eval $__RUNPROG | awk -F "address " '/has/ {print $2; exit}' )
|
|
}
|
|
|
|
elif [ -x /usr/bin/nslookup ]; then # last use BusyBox nslookup
|
|
[ $force_ipversion -ne 0 -o $force_dnstcp -ne 0 ] && \
|
|
critical_error "nslookup - no support to 'force IP Version' or 'DNS over TCP'"
|
|
|
|
__RUNPROG="nslookup $domain $dns_server 2>/dev/null"
|
|
__ERRPROG="nslookup $domain $dns_server 2>&1"
|
|
verbose_echo " resolver prog =: $__RUNPROG"
|
|
__IP=$(eval $__RUNPROG)
|
|
__ERR=$?
|
|
# command error
|
|
[ $__ERR -gt 0 ] && {
|
|
verbose_echo "\n!!!!!!!!! ERROR =: BusyBox nslookup Error '$__ERR'\n$(eval $__ERRPROG)\n"
|
|
syslog_err "DNS Resolver Error - BusyBox nslookup Error: '$__ERR'"
|
|
return 1
|
|
} || {
|
|
# we need to run twice because multi-line output needs to be directly piped to grep because
|
|
# pipe returns return code of last prog in pipe but we need errors from nslookup command
|
|
__IP=$(eval $__RUNPROG | sed -ne "3,\$ { s/^Address [0-9]*: \($__REGEX\).*$/\\1/p }" )
|
|
}
|
|
|
|
else # there must be an error
|
|
critical_error "No program found to request public registered IP"
|
|
fi
|
|
|
|
verbose_echo " resolved ip =: '$__IP'"
|
|
|
|
# if NO IP was found
|
|
[ -z "$__IP" ] && return 1
|
|
|
|
eval "$1='$__IP'"
|
|
return 0
|
|
}
|
|
|
|
get_uptime() {
|
|
# $1 Variable to store result in
|
|
local __UPTIME=$(cat /proc/uptime)
|
|
eval "$1='${__UPTIME%%.*}'"
|
|
}
|