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minor: 🎨 change code style

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Eduard Veit
2022-01-31 13:51:48 +01:00
parent 8721af229d
commit 3d1b27aaed
1 changed files with 181 additions and 154 deletions
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335
dynb.sh
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@@ -85,57 +85,66 @@ reset_color_modification="\e[0m"
REGEX_IPv4="^(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$"
REGEX_IPv6="^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$"
function is_IPv4_address() {
if [[ $1 =~ $REGEX_IPv4 ]]
function is_IPv4_address
{
local ip=$1
if [[ $ip =~ $REGEX_IPv4 ]]
then return 0
else return 1
fi
}
function is_IPv6_address() {
if [[ $1 =~ $REGEX_IPv6 ]]
function is_IPv6_address
{
local ip=$1
if [[ $ip =~ $REGEX_IPv6 ]]
then return 0
else return 1
fi
}
function loopMode() {
if [[ $_loopMode -eq 1 ]]; then
return 0
else
return 1
function loopMode
{
if [[ $_loopMode -eq 1 ]]
then return 0
else return 1
fi
}
function debugMode() {
if [[ $_debug -eq 1 ]]; then
return 0
else
return 1
function debugMode
{
if [[ $_debug -eq 1 ]]
then return 0
else return 1
fi
}
function infoMessage() {
function infoMessage
{
echo -e "${green_color}$(logtime) INFO: $*${reset_color_modification}"
}
function debugMessage() {
if debugMode; then
echo -e "${yellow_color}$(logtime) DEBUG: ${*}${reset_color_modification}"
function debugMessage
{
if debugMode
then echo -e "${yellow_color}$(logtime) DEBUG: ${*}${reset_color_modification}"
fi
}
function errorMessage() {
function errorMessage
{
echo -e "${red_color_bg}${bold}$(logtime) ERROR: $*${reset_color_modification}" >&2
}
function logtime() {
function logtime
{
LOGTIME=$(date "+%Y-%m-%d %H:%M:%S")
echo "[$LOGTIME]"
}
# The main domain as an identifier for the dns zone is required for the updateRecord call
function getMainDomain() {
function getMainDomain
{
request=$(
echo "{}" |
jq '(.method="nameserver.list")' |
@@ -154,7 +163,8 @@ function getMainDomain() {
_main_domain=$(echo "$_response" | jq --raw-output '.domain')
}
function fetchDNSRecords() {
function fetchDNSRecords
{
request=$(
echo "{}" |
jq '(.method="'nameserver.info'")' |
@@ -178,27 +188,34 @@ function fetchDNSRecords() {
# requires parameter A or AAAA
# result to stdout
function getRecordID() {
echo "$_dns_records" | jq "select(.type == \"${1}\") | .id"
function getRecordID
{
echo "$_dns_records" |
jq "select(.type == \"${1}\") | .id"
}
# requires parameter A or AAAA
# result to stdout
function getDNSIP() {
echo "$_dns_records" | jq --raw-output "select(.type == \"${1}\") | .content"
echo "$_dns_records" |
jq --raw-output "select(.type == \"${1}\") | .content"
}
# requires parameter
# 1. param: 4 or 6 for ip version
# 2. param: IP check server address
# result to stdout
function getRemoteIP() {
if [[ -n $_DNS_checkServer ]]; then
function getRemoteIP
{
local ip_version=$1
local ip_check_server=$2
if [[ -n $_DNS_checkServer ]]
then
curl --silent "$_interface_str" --user-agent "$_userAgent" \
--ipv"${1}" --dns-servers "$_DNS_checkServer" --location "${2}"
--ipv"${ip_version}" --dns-servers "$_DNS_checkServer" --location "${ip_check_server}"
else
curl --silent "$_interface_str" --user-agent "$_userAgent" \
--ipv"${1}" --location "${2}"
--ipv"${ip_version}" --location "${ip_check_server}"
fi
# shellcheck disable=2181
if [[ $? -gt 0 ]]; then
@@ -209,16 +226,21 @@ function getRemoteIP() {
# requires parameter
# 1. param: 4 or 6 as ip version
function updateRecord() {
if [[ ${1} == 4 ]]; then
function updateRecord
{
local ip_version=$1
if [[ ${ip_version} == 4 ]]
then
ID=$(getRecordID A)
IP=$_new_IPv4
fi
if [[ ${1} == 6 ]]; then
if [[ ${ip_version} == 6 ]]
then
ID=$(getRecordID AAAA)
IP=$_new_IPv6
fi
if [[ $IP != "" ]]; then
if [[ $IP != "" ]]
then
request=$(
echo "{}" |
jq '(.method="nameserver.updateRecord")' |
@@ -242,7 +264,8 @@ function updateRecord() {
}
# using DynDNS2 protocol
function dynupdate() {
function dynupdate
{
# default parameter values
myip_str=myip
myipv6_str=myipv6
@@ -378,12 +401,14 @@ function dynupdate() {
esac
}
function setStatus() {
function setStatus
{
echo "_status=$1; _eventTime=$2; _errorCounter=$3; _statusHostname=$4; _statusUsername=$5; _statusPassword=$6" >/tmp/dynb.status
}
# handle errors from past update requests
function checkStatus() {
function checkStatus
{
case $_status in
nochg*)
if [[ _errorCounter -gt 1 ]]; then
@@ -451,26 +476,24 @@ function checkStatus() {
# requires parameter
# 1. param: 4 or 6 for IP version
function ipHasChanged() {
case ${1} in
function ipHasChanged
{
local ip_version=$1
case ${ip_version} in
4)
remote_ip=$(getRemoteIP 4 $_ipv4_checker)
if ! is_IPv4_address "$remote_ip"
then
errorMessage "The response from the IP check server is not an IPv4 address: $remote_ip"
return 0
then errorMessage "The response from the IP check server is not an IPv4 address: $remote_ip"; return 0
fi
if [[ $DYNB_UPDATE_METHOD == domrobot ]]; then
dns_ip=$(getDNSIP A)
if [[ $DYNB_UPDATE_METHOD == domrobot ]]
then dns_ip=$(getDNSIP A)
else
if [[ -n $_DNS_checkServer ]]; then
dig_response=$(dig @"${_DNS_checkServer}" in a +short "$DYNB_DYN_DOMAIN")
else
dig_response=$(dig in a +short "$DYNB_DYN_DOMAIN")
if [[ -n $_DNS_checkServer ]]
then dig_response=$(dig @"${_DNS_checkServer}" in a +short "$DYNB_DYN_DOMAIN")
else dig_response=$(dig in a +short "$DYNB_DYN_DOMAIN")
fi
if [[ $dig_response == ";; connection timed out; no servers could be reached" ]]; then
errorMessage "DNS request failed $dig_response"
return 0
if [[ $dig_response == ";; connection timed out; no servers could be reached" ]]
then errorMessage "DNS request failed $dig_response"; return 0
fi
# If the dns resolver lists multiple records in the answer section we filter the first line
# using short option "-n" and not "--lines" because of alpines limited BusyBox head command
@@ -507,10 +530,10 @@ function ipHasChanged() {
*) ;;
esac
if [[ "$remote_ip" == "$dns_ip" ]]; then
return 0
if [[ "$remote_ip" == "$dns_ip" ]]
then return 0
else
case ${1} in
case ${ip_version} in
4) infoMessage "New IPv4: $_new_IPv4 old was: $dns_ip";;
6) infoMessage "New IPv6: $_new_IPv6 old was: $dns_ip";;
esac
@@ -522,95 +545,94 @@ function ipHasChanged() {
## parameters ##
################
function handleParameters() {
function handleParameters
{
# shellcheck disable=SC2154
if [[ $_arg_version == "on" ]]; then
echo $_version
exit 0
if [[ $_arg_version == "on" ]]
then echo $_version; exit 0
fi
# shellcheck disable=SC2154
if [[ $_arg_link == "on" ]]; then
ln --verbose --symbolic "$(realpath "$0")" "$HOME/.local/bin/dynb"
exit 0
if [[ $_arg_link == "on" ]]
then ln --verbose --symbolic "$(realpath "$0")" "$HOME/.local/bin/dynb"; exit 0
fi
# shellcheck disable=SC2154
if [[ $_arg_reset == "on" ]]; then
rm --verbose "$_statusFile"
exit 0
if [[ $_arg_reset == "on" ]]
then rm --verbose "$_statusFile"; exit 0
fi
# shellcheck disable=SC2154
if [[ $_arg_debug == "on" ]]; then
_debug=1
if [[ $_arg_debug == "on" ]]
then _debug=1
fi
# shellcheck disable=SC2154
if [[ $_arg_update_method != "" ]]; then
DYNB_UPDATE_METHOD=$_arg_update_method
if [[ $_arg_update_method != "" ]]
then DYNB_UPDATE_METHOD=$_arg_update_method
fi
# shellcheck disable=SC2154
if [[ $_arg_ip_mode != "" ]]; then
DYNB_IP_MODE=$_arg_ip_mode
if [[ $_arg_ip_mode != "" ]]
then DYNB_IP_MODE=$_arg_ip_mode
fi
# shellcheck disable=SC2154
if [[ $_arg_domain != "" ]]; then
DYNB_DYN_DOMAIN=$_arg_domain
if [[ $_arg_domain != "" ]]
then DYNB_DYN_DOMAIN=$_arg_domain
fi
# shellcheck disable=SC2154
if [[ $_arg_service_provider != "" ]]; then
DYNB_SERVICE_PROVIDER=$_arg_service_provider
if [[ $_arg_service_provider != "" ]]
then DYNB_SERVICE_PROVIDER=$_arg_service_provider
fi
# shellcheck disable=SC2154
if [[ $_arg_username != "" ]]; then
DYNB_USERNAME=$_arg_username
if [[ $_arg_username != "" ]]
then DYNB_USERNAME=$_arg_username
fi
# shellcheck disable=SC2154
if [[ $_arg_password != "" ]]; then
DYNB_PASSWORD=$_arg_password
if [[ $_arg_password != "" ]]
then DYNB_PASSWORD=$_arg_password
fi
# shellcheck disable=SC2154
if [[ $_arg_token != "" ]]; then
DYNB_TOKEN=$_arg_token
if [[ $_arg_token != "" ]]
then DYNB_TOKEN=$_arg_token
fi
# shellcheck disable=SC2154
if [[ $_arg_interval != "" ]]; then
DYNB_INTERVAL=$_arg_interval
if [[ $_arg_interval != "" ]]
then DYNB_INTERVAL=$_arg_interval
fi
if [[ -z $DYNB_INTERVAL ]]; then
_loopMode=0
elif [[ $DYNB_INTERVAL -lt _minimum_looptime ]]; then
if [[ -z $DYNB_INTERVAL ]]
then _loopMode=0
elif [[ $DYNB_INTERVAL -lt _minimum_looptime ]]
then
DYNB_INTERVAL=$_minimum_looptime
_loopMode=1
else
_loopMode=1
else _loopMode=1
fi
if [[ $_network_interface != "" ]]; then
_interface_str="--interface $_network_interface"
if [[ $_network_interface != "" ]]
then _interface_str="--interface $_network_interface"
fi
if [[ $DYNB_IP_MODE == d* ]]; then
if [[ $DYNB_IP_MODE == d* ]]
then
_is_IPv4_enabled=true
_is_IPv6_enabled=true
fi
if [[ $DYNB_IP_MODE == *4* ]]; then
_is_IPv4_enabled=true
if [[ $DYNB_IP_MODE == *4* ]]
then _is_IPv4_enabled=true
fi
if [[ $DYNB_IP_MODE == *6* ]]; then
_is_IPv6_enabled=true
if [[ $DYNB_IP_MODE == *6* ]]
then _is_IPv6_enabled=true
fi
if [[ $DYNB_DEBUG == true ]]; then
_debug=1
if [[ $DYNB_DEBUG == true ]]
then _debug=1
fi
# shellcheck disable=SC2154
if [[ -n $DYNB_IPv4_CHECK_SITE ]]; then
_ipv4_checker=$DYNB_IPv4_CHECK_SITE
if [[ -n $DYNB_IPv4_CHECK_SITE ]]
then _ipv4_checker=$DYNB_IPv4_CHECK_SITE
fi
# shellcheck disable=SC2154
if [[ -n $DYNB_IPv6_CHECK_SITE ]]; then
_ipv6_checker=$DYNB_IPv6_CHECK_SITE
if [[ -n $DYNB_IPv6_CHECK_SITE ]]
then _ipv6_checker=$DYNB_IPv6_CHECK_SITE
fi
if [[ -n $DYNB_DNS_CHECK_SERVER ]]; then
_DNS_checkServer=$DYNB_DNS_CHECK_SERVER
if [[ -n $DYNB_DNS_CHECK_SERVER ]]
then _DNS_checkServer=$DYNB_DNS_CHECK_SERVER
fi
return 0
}
@@ -619,7 +641,8 @@ function handleParameters() {
## dependencies ##
##################
function checkDependencies() {
function checkDependencies
{
failCounter=0
for i in curl dig; do
if ! command -v $i >/dev/null 2>&1; then
@@ -638,7 +661,8 @@ function checkDependencies() {
fi
}
function doUnsets() {
function doUnsets
{
unset _network_interface
unset _DNS_checkServer
unset _dns_records
@@ -666,66 +690,68 @@ function doUnsets() {
unset DYNB_DEBUG
}
function doDomrobotUpdates() {
function doDomrobotUpdates
{
getMainDomain
fetchDNSRecords
if [[ $_is_IPv4_enabled == true ]]; then
if [[ $_is_IPv4_enabled == true ]]
then
ipHasChanged 4
if [[ $? == 1 ]]; then
updateRecord 4
else
debugMessage "Skip IPv4 record update, it is already up to date"
if [[ $? == 1 ]]
then updateRecord 4
else debugMessage "Skip IPv4 record update, it is already up to date"
fi
fi
if [[ $_is_IPv6_enabled == true ]]; then
if [[ $_is_IPv6_enabled == true ]]
then
ipHasChanged 6
if [[ $? == 1 ]]; then
updateRecord 6
else
debugMessage "Skip IPv6 record update, it is already up to date"
if [[ $? == 1 ]]
then updateRecord 6
else debugMessage "Skip IPv6 record update, it is already up to date"
fi
fi
}
function doDynDNS2Updates() {
function doDynDNS2Updates
{
changed=0
if [[ $_is_IPv4_enabled == true ]]; then
ipHasChanged 4
((changed += $?))
if [[ $_is_IPv4_enabled == true ]]
then ipHasChanged 4; ((changed += $?))
fi
if [[ $_is_IPv6_enabled == true ]]; then
ipHasChanged 6
((changed += $?))
if [[ $_is_IPv6_enabled == true ]]
then ipHasChanged 6; ((changed += $?))
fi
if [[ $changed -gt 0 ]]; then
if checkStatus; then
if [[ $changed -gt 0 ]]
then
if checkStatus
then
debugMessage "checkStatus has no errors, try update"
if dynupdate; then
debugMessage "DynDNS2 update success"
if dynupdate
then debugMessage "DynDNS2 update success"
else
debugMessage "Save new status after dynupdate has failed"
setStatus "$_response" "$(date +%s)" $((_errorCounter += 1)) "$DYNB_DYN_DOMAIN" "${DYNB_USERNAME}" "${DYNB_PASSWORD}${DYNB_TOKEN}"
fi
else
debugMessage "Skip DynDNS2 update, checkStatus fetched previous error."
else debugMessage "Skip DynDNS2 update, checkStatus fetched previous error."
fi
else
debugMessage "Skip DynDNS2 update, IPs are up to date or there is a connection problem"
else debugMessage "Skip DynDNS2 update, IPs are up to date or there is a connection problem"
fi
}
function doUpdates() {
if [[ $DYNB_UPDATE_METHOD == "domrobot" ]]; then
doDomrobotUpdates
function doUpdates
{
if [[ $DYNB_UPDATE_METHOD == "domrobot" ]]
then doDomrobotUpdates
fi
if [[ $DYNB_UPDATE_METHOD == "dyndns" ]]; then
doDynDNS2Updates
if [[ $DYNB_UPDATE_METHOD == "dyndns" ]]
then doDynDNS2Updates
fi
}
function ipv6_is_not_working() {
curl --ipv6 --head --silent --max-time 1 "$_internet_connectivity_test_server" > /dev/null
function ipv6_is_not_working
{
curl --ipv6 --head --silent --max-time 1 $_internet_connectivity_test_server > /dev/null
status_code=$?
if [[ $status_code -gt 0 ]]
then return 0
@@ -733,8 +759,9 @@ function ipv6_is_not_working() {
fi
}
function ipv4_is_not_working() {
curl --ipv4 --head --silent --max-time 1 "$_internet_connectivity_test_server" > /dev/null
function ipv4_is_not_working
{
curl --ipv4 --head --silent --max-time 1 $_internet_connectivity_test_server > /dev/null
status_code=$?
if [[ $status_code -gt 0 ]]
then return 0
@@ -742,7 +769,8 @@ function ipv4_is_not_working() {
fi
}
function check_internet_connection() {
function check_internet_connection
{
if [[ $_is_IPv4_enabled == true ]]
then
if ipv4_is_not_working
@@ -761,25 +789,26 @@ function check_internet_connection() {
fi
}
#################
## MAIN method ##
#################
function dynb() {
function main
{
# shellcheck disable=SC1091,SC1090
source "$(dirname "$(realpath "$0")")/dynb-parsing.sh"
# shellcheck source=.env
if test -f "$_configFile"; then
if test -f "$_configFile"
then
# shellcheck disable=SC1091
source "$_configFile"
else
alternativeConfig="$(dirname "$(realpath "$0")")/.env"
if test -f "$alternativeConfig"; then
if test -f "$alternativeConfig"
then
# shellcheck disable=SC1091
source "$alternativeConfig"
fi
fi
if test -f "$_statusFile"; then
if test -f "$_statusFile"
then
debugMessage "read previous status file"
# shellcheck disable=SC1090
source "$_statusFile"
@@ -790,21 +819,19 @@ function dynb() {
checkDependencies
check_internet_connection
if loopMode; then
while :; do
if loopMode
then
while :
do
doUpdates
sleep $DYNB_INTERVAL
done
else
doUpdates
else doUpdates
fi
doUnsets
return 0
}
######################
## END MAIN section ##
######################
dynb "${@}"
main "${@}"
exit $?