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dynamic-ip/getip.sh

280 lines
9.7 KiB
Bash
Executable File

#!/bin/bash
#/--------------------------------------------------------------------------------------------------------| www.vdm.io |------/
# __ __ _ _____ _ _ __ __ _ _ _
# \ \ / / | | | __ \ | | | | | \/ | | | | | | |
# \ \ / /_ _ ___| |_ | | | | _____ _____| | ___ _ __ _ __ ___ ___ _ __ | |_ | \ / | ___| |_| |__ ___ __| |
# \ \/ / _` / __| __| | | | |/ _ \ \ / / _ \ |/ _ \| '_ \| '_ ` _ \ / _ \ '_ \| __| | |\/| |/ _ \ __| '_ \ / _ \ / _` |
# \ / (_| \__ \ |_ | |__| | __/\ V / __/ | (_) | |_) | | | | | | __/ | | | |_ | | | | __/ |_| | | | (_) | (_| |
# \/ \__,_|___/\__| |_____/ \___| \_/ \___|_|\___/| .__/|_| |_| |_|\___|_| |_|\__| |_| |_|\___|\__|_| |_|\___/ \__,_|
# | |
# |_|
#/-------------------------------------------------------------------------------------------------------------------------------/
#
# @version 1.0.0
# @build 21st July, 2017
# @package Dynamic IP
# @author Llewellyn van der Merwe <https://github.com/Llewellynvdm>
# @copyright Copyright (C) 2015. All Rights Reserved
# @license GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
#
#/-----------------------------------------------------------------------------------------------------------------------------/
############################ GLOBAL ##########################
ACTION="getip"
######### DUE TO NOT BEING ABLE TO INCLUDE DYNAMIC ###########
#################### UPDATE TO YOUR NEEDS ####################
##############################################################
############## ##########
############## CONFIG ##########
############## ##########
##############################################################
REPOURL="https://raw.githubusercontent.com/vdm-io/dynamic-ip/master/"
VDMIPSERVER="https://www.vdm.io/$ACTION"
##############################################################
############## ##########
############## MAIN ##########
############## ##########
##############################################################
function main () {
## set time for this run
echoTweak "$ACTION on $Datetimenow"
echo "started"
# get this server IP
HOSTIP="$(dig +short myip.opendns.com @resolver1.opendns.com)"
## make sure cron is set
setCron
## get the local server key
getLocalKey
## check access (set if not ready)
setAccessToken
## get the IPs
getIPs
## check the IPs and then set
setDNS
}
##############################################################
############## ##########
############## DEFAULTS ##########
############## ##########
##############################################################
Datetimenow=$(TZ=":ZULU" date +"%m/%d/%Y @ %R (UTC)" )
VDMUSER=$(whoami)
VDMHOME=~/
VDMSCRIPT="${REPOURL}$ACTION.sh"
VDMSERVERKEY=''
TRUE=1
FALSE=0
HOSTIP=''
THEIPS=''
##############################################################
############## ##########
############## FUNCTIONS ##########
############## ##########
##############################################################
# little repeater
function repeat () {
head -c $1 < /dev/zero | tr '\0' $2
}
# little echo tweak
function echoTweak () {
echoMessage="$1"
mainlen="$2"
characters="$3"
if [ $# -lt 2 ]
then
mainlen=60
fi
if [ $# -lt 3 ]
then
characters='\056'
fi
chrlen="${#echoMessage}"
increaseBy=$((mainlen-chrlen))
tweaked=$(repeat "$increaseBy" "$characters")
echo -n "$echoMessage$tweaked"
}
# Set cronjob without removing existing
function setCron () {
if [ -f $VDMHOME/$ACTION.cron ]; then
echoTweak "Crontab already configured for updates..."
echo "Skipping"
else
echoTweak "Adding crontab entry for continued updates..."
# check if user crontab is set
currentCron=$(crontab -u $VDMUSER -l 2>/dev/null)
if [[ -z "${currentCron// }" ]]; then
currentCron="# VDM crontab settings"
echo "$currentCron" > $VDMHOME/$ACTION.cron
else
echo "$currentCron" > $VDMHOME/$ACTION.cron
fi
# check if the MAILTO is already set
if [[ $currentCron != *"MAILTO"* ]]; then
echo "MAILTO=\"\"" >> $VDMHOME/$ACTION.cron
echo "" >> $VDMHOME/$ACTION.cron
fi
# check if the @reboot curl -s $VDMSCRIPT | sudo bash is already set
if [[ $currentCron != *"@reboot curl -s $VDMSCRIPT | bash"* ]]; then
echo "@reboot curl -s $VDMSCRIPT | bash" >> $VDMHOME/$ACTION.cron
fi
# check if the @reboot curl -s $VDMSCRIPT | sudo bash is already set
if [[ $currentCron != *"*/7 * * * * curl -s $VDMSCRIPT | bash"* ]]; then
echo "*/7 * * * * curl -s $VDMSCRIPT | bash" >> $VDMHOME/$ACTION.cron
fi
# set the user cron
crontab -u $VDMUSER $VDMHOME/$ACTION.cron
echo "Done"
fi
}
function getKey () {
# simple basic random
echo $(tr -dc 'A-HJ-NP-Za-km-z2-9' < /dev/urandom | dd bs=128 count=1 status=none)
}
function getLocalKey () {
# Set update key
if [ -f $VDMHOME/$ACTION.key ]; then
echoTweak "Update key already set!"
echo "continue"
else
echoTweak "Setting the update key..."
echo $(getKey) > $VDMHOME/$ACTION.key
echo "Done"
fi
# Get update key
VDMSERVERKEY=$(<"$VDMHOME/$ACTION.key")
}
function setAccessToken () {
# check if vdm access was set
accessToke=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36" -H "VDM-KEY: $VDMSERVERKEY" -H "VDM-HOST-IP: $HOSTIP" --silent $VDMIPSERVER)
if [[ "$accessToke" != "$TRUE" ]]; then
read -s -p "Please enter your VDM access key: " vdmAccessKey
echo ""
echoTweak "One moment while we set your access to the VDM system..."
resultAccess=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36" -H "VDM-TRUST: $vdmAccessKey" -H "VDM-KEY: $VDMSERVERKEY" -H "VDM-HOST-IP: $HOSTIP" --silent $VDMIPSERVER)
if [[ "$resultAccess" != "$TRUE" ]]; then
echo "YOUR VDM ACCESS KEY IS INCORRECT! >> $resultAccess"
exit 1
fi
echo "Done"
else
echoTweak "Access granted to the VDM system."
echo "Done"
fi
}
function getIPs () {
# store the IP in the HOSTNAME file
echoTweak "Getting the Dynamic IPs..."
THEIPS=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36" -H "VDM-KEY: $VDMSERVERKEY" -H "VDM-HOST-IP: $HOSTIP" -H "VDM-GET: 1" --silent $VDMIPSERVER)
# the IPs
if [[ "$THEIPS" == "$FALSE" || ${#THEIPS} -lt 15 ]]; then
echo "No IPs FOUND! "
exit 1
fi
echo "Done"
}
function setDNS () {
# check IPS
readarray -t rows <<< "$THEIPS"
for rr in "${rows[@]}" ; do
row=( $rr )
if [[ ${#row[@]} == 3 ]]; then
# first check IP
echoTweak "Checking the Dynamic IP..."
if [[ "${row[2]}" =~ ^([0-9]{1,3})[.]([0-9]{1,3})[.]([0-9]{1,3})[.]([0-9]{1,3})$ ]]
then
for (( i=1; i<${#BASH_REMATCH[@]}; ++i ))
do
if (( ${BASH_REMATCH[$i]} > 255 )); then
echo "bad IP"
continue
fi
done
else
echo "bad IP"
continue
fi
echo "Done"
echoTweak "Checking local DNS file..."
# check if the DNS file is found (CENTOS)
FILEPATH=0
if [ -f "/var/named/${row[1]}.${row[0]}.db" ]
then
FILEPATH="/var/named/${row[1]}.${row[0]}.db"
FILENAME="${row[1]}.${row[0]}"
elif [ -f "/var/named/${row[0]}.db" ]
then
FILEPATH="/var/named/${row[0]}.db"
FILENAME="${row[0]}"
fi
# confirm that it was found
if [[ "$FILEPATH" == 0 ]]
then
echo "not found"
continue
fi
echo "Done"
# now add the IP A record if needed
if grep -Fq "${row[2]}" "$FILEPATH"
then
# IP already set
echoTweak "DNS IP (${row[2]})..."
echo "already set"
else
tmpFile=$(getKey)
# first remove old IPs
grep -v "^${row[1]} " "$FILEPATH" > "/tmp/vdm_$tmpFile"
# start notice
echoTweak "DNS Adding A Record for IP (${row[2]})"
echo "started"
# add new a record to tmp file
echoTweak "${row[1]}" 16 '\040' >> "/tmp/vdm_$tmpFile"
echoTweak "1" 8 '\040' >> "/tmp/$tmpFile"
echo "IN A ${row[2]}" >> "/tmp/vdm_$tmpFile"
# add new a record to zone file
mv "/tmp/vdm_$tmpFile" "$FILEPATH"
#remove tmp file
# rm "/tmp/vdm_$tmpFile"
# Only reload the rndc if found
if [ -f "/etc/rndc.conf" ]
then
cd /var/named
echoTweak "reload $FILENAME IN external"
rndc reload "$FILENAME" IN external 2>/dev/null
echoTweak "reload $FILENAME IN internal"
rndc reload "$FILENAME" IN internal 2>/dev/null
echoTweak "notify $FILENAME IN external"
rndc notify "$FILENAME" IN external 2>/dev/null
echoTweak "notify $FILENAME IN internal"
rndc notify "$FILENAME" IN internal 2>/dev/null
echoTweak "refresh $FILENAME IN external"
rndc refresh "$FILENAME" IN external 2>/dev/null
echoTweak "refresh $FILENAME IN internal"
rndc refresh "$FILENAME" IN internal 2>/dev/null
cd ~
fi
fi
fi
done
}
##############################################################
############## ##########
############## MAIN ##########
############## ##########
##############################################################
main