+++ /dev/null
-#!/bin/sh
-# /usr/lib/dynamic_dns/dynamic_dns_updater.sh
-#
-# Written by Eric Paul Bishop, Janary 2008
-# Distributed under the terms of the GNU General Public License (GPL) version 2.0
-#
-# This script is (loosely) based on the one posted by exobyte in the forums here:
-# http://forum.openwrt.org/viewtopic.php?id=14040
-#
-
-. /usr/lib/ddns/dynamic_dns_functions.sh
-
-
-service_id=$1
-if [ -z "$service_id" ]
-then
- echo "ERRROR: You must specify a service id (the section name in the /etc/config/ddns file) to initialize dynamic DNS."
- return 1
-fi
-
-#default mode is verbose_mode, but easily turned off with second parameter
-verbose_mode="1"
-if [ -n "$2" ]
-then
- verbose_mode="$2"
-fi
-
-###############################################################
-# Leave this comment here, to clearly document variable names
-# that are expected/possible
-#
-# Now use load_all_config_options to load config
-# options, which is a much more flexible solution.
-#
-#
-#config_load "ddns"
-#
-#config_get enabled $service_id enabled
-#config_get service_name $service_id service_name
-#config_get update_url $service_id update_url
-#
-#
-#config_get username $service_id username
-#config_get password $service_id password
-#config_get domain $service_id domain
-#
-#
-#config_get use_https $service_id use_https
-#config_get use_syslog $service_id use_syslog
-#config_get cacert $service_id cacert
-#
-#config_get ip_source $service_id ip_source
-#config_get ip_interface $service_id ip_interface
-#config_get ip_network $service_id ip_network
-#config_get ip_url $service_id ip_url
-#
-#config_get force_interval $service_id force_interval
-#config_get force_unit $service_id force_unit
-#
-#config_get check_interval $service_id check_interval
-#config_get check_unit $service_id check_unit
-#########################################################
-load_all_config_options "ddns" "$service_id"
-
-
-#some defaults
-if [ -z "$check_interval" ]
-then
- check_interval=600
-fi
-
-if [ -z "$retry_interval" ]
-then
- retry_interval=60
-fi
-
-if [ -z "$check_unit" ]
-then
- check_unit="seconds"
-fi
-
-if [ -z "$force_interval" ]
-then
- force_interval=72
-fi
-
-if [ -z "$force_unit" ]
-then
- force_unit="hours"
-fi
-
-if [ -z $use_syslog ]
-then
- use_syslog=0
-fi
-
-if [ -z "$use_https" ]
-then
- use_https=0
-fi
-
-
-#some constants
-
-retrieve_prog="/usr/bin/wget -O - ";
-if [ "x$use_https" = "x1" ]
-then
- /usr/bin/wget --version 2>&1 |grep -q "\+ssl"
- if [ $? -eq 0 ]
- then
- if [ -f "$cacert" ]
- then
- retrieve_prog="${retrieve_prog}--ca-certificate=${cacert} "
- elif [ -d "$cacert" ]
- then
- retrieve_prog="${retrieve_prog}--ca-directory=${cacert} "
- fi
- else
- retrieve_prog="/usr/bin/curl "
- if [ -f "$cacert" ]
- then
- retrieve_prog="${retrieve_prog}--cacert $cacert "
- elif [ -d "$cacert" ]
- then
- retrieve_prog="${retrieve_prog}--capath $cacert "
- fi
- fi
-fi
-
-
-service_file="/usr/lib/ddns/services"
-
-ip_regex="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
-
-NEWLINE_IFS='
-'
-
-#determine what update url we're using if the service_name is supplied
-if [ -n "$service_name" ]
-then
- #remove any lines not containing data, and then make sure fields are enclosed in double quotes
- quoted_services=$(cat $service_file | grep "^[\t ]*[^#]" | awk ' gsub("\x27", "\"") { if ($1~/^[^\"]*$/) $1="\""$1"\"" }; { if ( $NF~/^[^\"]*$/) $NF="\""$NF"\"" }; { print $0 }' )
-
-
- #echo "quoted_services = $quoted_services"
- OLD_IFS=$IFS
- IFS=$NEWLINE_IFS
- for service_line in $quoted_services
- do
- #grep out proper parts of data and use echo to remove quotes
- next_name=$(echo $service_line | grep -o "^[\t ]*\"[^\"]*\"" | xargs -r -n1 echo)
- next_url=$(echo $service_line | grep -o "\"[^\"]*\"[\t ]*$" | xargs -r -n1 echo)
-
- if [ "$next_name" = "$service_name" ]
- then
- update_url=$next_url
- fi
- done
- IFS=$OLD_IFS
-fi
-
-if [ "x$use_https" = x1 ]
-then
- update_url=$(echo $update_url | sed -e 's/^http:/https:/')
-fi
-
-verbose_echo "update_url=$update_url"
-
-#if this service isn't enabled then quit
-if [ "$enabled" != "1" ]
-then
- return 0
-fi
-
-#compute update interval in seconds
-case "$force_unit" in
- "days" )
- force_interval_seconds=$(($force_interval*60*60*24))
- ;;
- "hours" )
- force_interval_seconds=$(($force_interval*60*60))
- ;;
- "minutes" )
- force_interval_seconds=$(($force_interval*60))
- ;;
- "seconds" )
- force_interval_seconds=$force_interval
- ;;
- * )
- #default is hours
- force_interval_seconds=$(($force_interval*60*60))
- ;;
-esac
-
-
-#compute check interval in seconds
-case "$check_unit" in
- "days" )
- check_interval_seconds=$(($check_interval*60*60*24))
- ;;
- "hours" )
- check_interval_seconds=$(($check_interval*60*60))
- ;;
- "minutes" )
- check_interval_seconds=$(($check_interval*60))
- ;;
- "seconds" )
- check_interval_seconds=$check_interval
- ;;
- * )
- #default is seconds
- check_interval_seconds=$check_interval
- ;;
-esac
-
-
-#compute retry interval in seconds
-case "$retry_unit" in
- "days" )
- retry_interval_seconds=$(($retry_interval*60*60*24))
- ;;
- "hours" )
- retry_interval_seconds=$(($retry_interval*60*60))
- ;;
- "minutes" )
- retry_interval_seconds=$(($retry_interval*60))
- ;;
- "seconds" )
- retry_interval_seconds=$retry_interval
- ;;
- * )
- #default is seconds
- retry_interval_seconds=$retry_interval
- ;;
-esac
-
-
-verbose_echo "force seconds = $force_interval_seconds"
-verbose_echo "check seconds = $check_interval_seconds"
-
-#kill old process if it exists & set new pid file
-if [ -d /var/run/dynamic_dns ]
-then
- #if process is already running, stop it
- if [ -e "/var/run/dynamic_dns/$service_id.pid" ]
- then
- old_pid=$(cat /var/run/dynamic_dns/$service_id.pid)
- test_match=$(ps | grep "^[\t ]*$old_pid")
- verbose_echo "old process id (if it exists) = \"$test_match\""
- if [ -n "$test_match" ]
- then
- kill $old_pid
- fi
- fi
-
-else
- #make dir since it doesn't exist
- mkdir /var/run/dynamic_dns
-fi
-echo $$ > /var/run/dynamic_dns/$service_id.pid
-
-
-
-
-#determine when the last update was
-current_time=$(monotonic_time)
-last_update=$(( $current_time - (2*$force_interval_seconds) ))
-if [ -e "/var/run/dynamic_dns/$service_id.update" ]
-then
- last_update=$(cat /var/run/dynamic_dns/$service_id.update)
-fi
-time_since_update=$(($current_time - $last_update))
-
-
-human_time_since_update=$(( $time_since_update / ( 60 * 60 ) ))
-verbose_echo "time_since_update = $human_time_since_update hours"
-
-
-
-#do update and then loop endlessly, checking ip every check_interval and forcing an updating once every force_interval
-
-while [ true ]
-do
- registered_ip=$(echo $(nslookup "$domain" 2>/dev/null) | grep -o "Name:.*" | grep -o "$ip_regex")
- current_ip=$(get_current_ip)
-
-
- current_time=$(monotonic_time)
- time_since_update=$(($current_time - $last_update))
-
- syslog_echo "Running IP check ..."
- verbose_echo "Running IP check..."
- verbose_echo "current system ip = $current_ip"
- verbose_echo "registered domain ip = $registered_ip"
-
-
- if [ "$current_ip" != "$registered_ip" ] || [ $force_interval_seconds -lt $time_since_update ]
- then
- verbose_echo "update necessary, performing update ..."
-
- #do replacement
- final_url=$update_url
- for option_var in $ALL_OPTION_VARIABLES
- do
- if [ "$option_var" != "update_url" ]
- then
- replace_name=$(echo "\[$option_var\]" | tr 'a-z' 'A-Z')
- replace_value=$(eval echo "\$$option_var")
- replace_value=$(echo $replace_value | sed -f /usr/lib/ddns/url_escape.sed)
- final_url=$(echo $final_url | sed s^"$replace_name"^"$replace_value"^g )
- fi
- done
- final_url=$(echo $final_url | sed s^"\[HTTPAUTH\]"^"${username//^/\\^}${password:+:${password//^/\\^}}"^g )
- final_url=$(echo $final_url | sed s/"\[IP\]"/"$current_ip"/g )
-
-
- verbose_echo "updating with url=\"$final_url\""
-
- #here we actually connect, and perform the update
- update_output=$( $retrieve_prog "$final_url" )
- if [ $? -gt 0 ]
- then
- syslog_echo "update failed, retrying in $retry_interval_seconds seconds"
- verbose_echo "update failed"
- sleep $retry_interval_seconds
- continue
- fi
- syslog_echo "Update successful"
- verbose_echo "Update Output:"
- verbose_echo "$update_output"
- verbose_echo ""
-
- #save the time of the update
- current_time=$(monotonic_time)
- last_update=$current_time
- time_since_update='0'
- registered_ip=$current_ip
-
- human_time=$(date)
- verbose_echo "update complete, time is: $human_time"
-
- echo "$last_update" > "/var/run/dynamic_dns/$service_id.update"
- else
- human_time=$(date)
- human_time_since_update=$(( $time_since_update / ( 60 * 60 ) ))
- verbose_echo "update unnecessary"
- verbose_echo "time since last update = $human_time_since_update hours"
- verbose_echo "the time is now $human_time"
- fi
-
- #sleep for 10 minutes, then re-check ip && time since last update
- sleep $check_interval_seconds
-done
-
-#should never get here since we're a daemon, but I'll throw it in anyway
-return 0
-
-
-
-
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