dvalfrid/joker.sh

## joker.sh
#!/bin/bash

# Fetching IP adress from joker.com
# Format: <html><head><title>Current IP Check</title></head><body>Current IP Address: 88.80.167.132</body></html>
function fetchIP  {
	local _returnParam=$1
	local _response=$(curl --silent https://svc.joker.com/nic/checkip)
	local _exit_code=$?

	if [ $_exit_code -ne 0 ]; then
	(
		logger "Faild to fetch new IP adress"
	)
	fi
	eval $_returnParam="'$_response'"
}

# Extract IP adress from response
function extractIP {
	local _returnParam=$1 							# <html><head><title>Current IP Check</title></head><body>Current IP Address: 88.80.167.132</body></html>

	local _current_ip=$(echo $2 | sed -n -e 's/.*IP Address: \([0-9\.]*\).*/\1/p')
	local _exit_code=$?
	if [ $_exit_code -ne 0 ]; then
		logger "[WARNING] Faild to match IP number"
  	fi

	eval $_returnParam="$_current_ip"
}

# Fetching old IP from file
function oldIP {
	local _returnParam=$1
	local _file=$2
	if [ ! -f "$_file" ]; then						          # Check if file exists
		touch "$_file" 								                # Create file
	fi
	eval $_returnParam="`cat $_file`"
}

# Update DNS Server
function updateDNS {
	local _current_ip=$1
	local _updateResponse=$(curl --write-out %{http_code} --silent --output /dev/null $3)
	local _update_exit_code=$?

	if [ $_update_exit_code -ne 0 ]; then						# Curl could not make the call
	(
		logger "[Warning] Failed to update DNS provider, exit code: $_update_exit_code"
	)
	else
	(
		if [ $_updateResponse -ne 200 ]; then					# Response call was not 200
		(
			logger "[Warning] Faild to update DNS provider, response code: $_updateResponse"
		)
		else
		(
			echo $_current_ip > $2              				# Save current IP to file
			logger "[Info] Old IP: $old_ip,  New IP: $_current_ip"
		)
		fi
	)
	fi
}

# Main program
logger "[Info] DNS update started"
file="/usr/local/var/log/myip.file3"		        # Local storage for IP number

fetchIP response 							                  # Fetching the IP
extractIP currnet_ip "$response"			          # Extracting IP from response
oldIP old_ip "$file"					 	                # Read old IP adress from file

if [ "$currnet_ip" == "$old_ip" ]; then		      # Check if old and current IP are same
(
	logger "[Info] Same IP adress: $old_ip"
)
else  										                      # They are not the same
(
	updateDNS $currnet_ip $file "https://svc.joker.com/nic/update?username=<username>&password=<passowrd>&hostname=<domain>&myip=$currnet_ip&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"
)
fi

logger "[Info] DNS update finished"
	#!/bin/bash

	# Fetching IP adress from joker.com
	# Format: <html><head><title>Current IP Check</title></head><body>Current IP Address: 88.80.167.132</body></html>
	function fetchIP {
	local _returnParam=$1
	local _response=$(curl --silent https://svc.joker.com/nic/checkip)
	local _exit_code=$?

	if [ $_exit_code -ne 0 ]; then
	(
	logger "Faild to fetch new IP adress"
	)
	fi
	eval $_returnParam="'$_response'"
	}

	# Extract IP adress from response
	function extractIP {
	local _returnParam=$1 # <html><head><title>Current IP Check</title></head><body>Current IP Address: 88.80.167.132</body></html>

	local _current_ip=$(echo $2 \| sed -n -e 's/.IP Address: \([0-9\.]\).*/\1/p')
	local _exit_code=$?
	if [ $_exit_code -ne 0 ]; then
	logger "[WARNING] Faild to match IP number"
	fi

	eval $_returnParam="$_current_ip"
	}

	# Fetching old IP from file
	function oldIP {
	local _returnParam=$1
	local _file=$2
	if [ ! -f "$_file" ]; then # Check if file exists
	touch "$_file" # Create file
	fi
	eval $_returnParam="`cat $_file`"
	}

	# Update DNS Server
	function updateDNS {
	local _current_ip=$1
	local _updateResponse=$(curl --write-out %{http_code} --silent --output /dev/null $3)
	local _update_exit_code=$?

	if [ $_update_exit_code -ne 0 ]; then # Curl could not make the call
	(
	logger "[Warning] Failed to update DNS provider, exit code: $_update_exit_code"
	)
	else
	(
	if [ $_updateResponse -ne 200 ]; then # Response call was not 200
	(
	logger "[Warning] Faild to update DNS provider, response code: $_updateResponse"
	)
	else
	(
	echo $_current_ip > $2 # Save current IP to file
	logger "[Info] Old IP: $old_ip, New IP: $_current_ip"
	)
	fi
	)
	fi
	}

	# Main program
	logger "[Info] DNS update started"
	file="/usr/local/var/log/myip.file3" # Local storage for IP number

	fetchIP response # Fetching the IP
	extractIP currnet_ip "$response" # Extracting IP from response
	oldIP old_ip "$file" # Read old IP adress from file

	if [ "$currnet_ip" == "$old_ip" ]; then # Check if old and current IP are same
	(
	logger "[Info] Same IP adress: $old_ip"
	)
	else # They are not the same
	(
	updateDNS $currnet_ip $file "https://svc.joker.com/nic/update?username=<username>&password=<passowrd>&hostname=<domain>&myip=$currnet_ip&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"
	)
	fi

	logger "[Info] DNS update finished"