51b2b455a2
Convert all logging output to plain-text structured messages using new function.
625 lines
21 KiB
Bash
625 lines
21 KiB
Bash
#!/bin/sh
|
|
|
|
#
|
|
# update Cloudflare DNS records with current (dynamic) IP address
|
|
# Script by Asif Bacchus <asif@bacchus.cloud>
|
|
# Last modified: July 19, 2026
|
|
# Version 3.0
|
|
#
|
|
|
|
### text formatting presets using tput
|
|
if command -v tput >/dev/null; then
|
|
[ -z "$TERM" ] && export TERM=xterm
|
|
bold=$(tput bold)
|
|
cyan=$(tput setaf 6)
|
|
err=$(tput bold)$(tput setaf 1)
|
|
magenta=$(tput setaf 5)
|
|
norm=$(tput sgr0)
|
|
ok=$(tput setaf 2)
|
|
warn=$(tput bold)$(tput setaf 3)
|
|
yellow=$(tput setaf 3)
|
|
width=$(tput cols)
|
|
else
|
|
bold=""
|
|
cyan=""
|
|
err=""
|
|
magenta=""
|
|
norm=""
|
|
ok=""
|
|
warn=""
|
|
yellow=""
|
|
width=80
|
|
fi
|
|
|
|
getTimeStamp() {
|
|
(date -u +"%Y-%m-%dT%H:%M:%SZ")
|
|
}
|
|
|
|
getHostname() {
|
|
(hostname -s)
|
|
}
|
|
|
|
lowercase() {
|
|
echo "$1" | tr '[:upper:]' '[:lower:]'
|
|
}
|
|
|
|
uppercase() {
|
|
echo "$1" | tr '[:lower:]' '[:upper:]'
|
|
}
|
|
|
|
standardizeLogLevels() {
|
|
LEVEL_TO_STANDARDIZE="$(lowercase "$1")"
|
|
case "$LEVEL_TO_STANDARDIZE" in
|
|
"critical" | "crit" | "fatal")
|
|
echo "CRIT"
|
|
;;
|
|
"error" | "err")
|
|
echo "ERR"
|
|
;;
|
|
"warning" | "warn")
|
|
echo "WARN"
|
|
;;
|
|
"information" | "info")
|
|
echo "INFO"
|
|
;;
|
|
"debug" | "verbose")
|
|
echo "DEBUG"
|
|
;;
|
|
*)
|
|
echo "INFO"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
# modified syslog fmt: <ISO-8601 timestamp> <hostname> <tag>[pid]: [LEVEL:$2] [STATUS:$3] <MESSAGE:$1> (<OPERATION:$4>:<CODE:$5>)
|
|
writePlainTextLog() {
|
|
# not enough information to generate a meaningful log message
|
|
if [ -z "$1" ] || [ $# -lt 3 ]; then
|
|
return
|
|
fi
|
|
|
|
printf "%s %s %s[%s]: [%s] [%s] %s (%s:%s)\n" \
|
|
"$(getTimeStamp)" "$(getHostname)" "$LOG_PROGRAM_NAME" "$$" \
|
|
"$(standardizeLogLevels "$2")" "$(uppercase "$3")" "$1" "${4:-UNSPECIFIED}" "${5:-0}" \
|
|
>>"$logFile"
|
|
}
|
|
|
|
### functions
|
|
badParam() {
|
|
if [ "$1" = "null" ]; then
|
|
printf "\n%sERROR: '%s' cannot have a NULL (empty) value.\n" "$err" "$2"
|
|
printf "%sPlease use '--help' for assistance.%s\n\n" "$cyan" "$norm"
|
|
exit 1
|
|
elif [ "$1" = "dne" ]; then
|
|
printf "\n%sERROR: '%s %s'\n" "$err" "$2" "$3"
|
|
printf "file or directory does not exist or is empty.%s\n\n" "$norm"
|
|
exit 1
|
|
elif [ "$1" = "errMsg" ]; then
|
|
printf "\n%sERROR: %s%s\n\n" "$err" "$2" "$norm"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
exitError() {
|
|
case "$1" in
|
|
3)
|
|
errMsg="Unable to connect to Cloudflare servers. This is probably a temporary networking issue. Please try again later."
|
|
;;
|
|
10)
|
|
errMsg="Unable to auto-detect IP address. Try again later or supply the IP address to be used."
|
|
;;
|
|
20)
|
|
errMsg="Cloudflare authorized email address (cfEmail) is either null or undefined. Please check your Cloudflare credentials file."
|
|
;;
|
|
21)
|
|
errMsg="Cloudflare authorized API key (cfKey) is either null or undefined. Please check your Cloudflare credentials file."
|
|
;;
|
|
22)
|
|
errMsg="Cloudflare zone id (cfZoneId) is either null or undefined. Please check your Cloudflare credentials file."
|
|
;;
|
|
25)
|
|
errMsg="Cloudflare API error. Please review any 'CF-ERR:' lines in this log for details."
|
|
;;
|
|
26)
|
|
errMsg="${failedHostCount} host update(s) failed. Any 'CF-ERR:' lines noted in this log may help determine what went wrong."
|
|
;;
|
|
*)
|
|
writeLog error "An unspecified error occurred. (code: 99)"
|
|
printf "%s[%s] -- Cloudflare DDNS update-script: completed with error(s) --%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
|
|
exit 99
|
|
;;
|
|
esac
|
|
writeLog error "$errMsg" "$1"
|
|
printf "%s[%s] -- Cloudflare DDNS update-script: completed with error(s) --%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
|
|
exit "$1"
|
|
}
|
|
|
|
exitOK() {
|
|
printf "%s[%s] -- Cloudflare DDNS update-script: completed successfully --%s\n" "$ok" "$(stamp)" "$norm" >>"$logFile"
|
|
exit 0
|
|
}
|
|
|
|
# 1: cloudflare error object, 2: operation identifier
|
|
listCFErrors() {
|
|
# extract error codes and messages in separate variables, replace newlines with underscores
|
|
codes="$(printf "%s" "$1" | jq -r '.errors | .[] | .code' | tr '\n' '_')"
|
|
messages="$(printf "%s" "$1" | jq -r '.errors | .[] | .message' | tr '\n' '_')"
|
|
|
|
# iterate codes and messages, assemble into a coherent log message
|
|
while [ -n "$codes" ] && [ -n "$messages" ]; do
|
|
# get the first code and message in respective sets
|
|
code="${codes%%_*}"
|
|
message="${messages%%_*}"
|
|
|
|
# update sets of codes and messages by removing the first item (above) in each set
|
|
codes="${codes#*_}"
|
|
messages="${messages#*_}"
|
|
|
|
# output to log
|
|
writePlainTextLog "${message}" "err" "fail" "$2" "$code"
|
|
done
|
|
}
|
|
|
|
scriptExamples() {
|
|
newline
|
|
printf "Update Cloudflare DNS host A/AAAA records with current IP address.\n"
|
|
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
|
|
textBlock "${magenta}--- usage examples ---${norm}"
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net"
|
|
textBlock "Update Cloudflare DNS records for myserver.mydomain.net with the auto-detected public IP4 address. Credentials will be expected in the default location and the log will be written in the default location also."
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net -6"
|
|
textBlock "Same as above, but update AAAA host records with the auto-detected public IP6 address."
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net,myserver2.mydomain.net -l /var/log/cfddns.log --nc"
|
|
textBlock "Update DNS entries for both listed hosts using auto-detected IP4 address. Write a non-coloured log to '/var/log/cfddns.log'."
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net,myserver2.mydomain.net -l /var/log/cfddns.log --ip6 --ip fd21:7a62:2737:9c3a::a151"
|
|
textBlock "Update DNS AAAA entries for listed hosts using the *specified* IP address. Write a colourful log to the location specified."
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log --ip 1.2.3.4"
|
|
textBlock "Update DNS A entry for listed hostname with the provided IP address. Read cloudflare credentials file from specified location, save log in specified location."
|
|
newline
|
|
textBlockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log -6 -i fd21:7a62:2737:9c3a::a151"
|
|
textBlock "Exact same as above, but change the AAAA record. This is how you run the script once for IP4 and again for IP6."
|
|
exit 0
|
|
}
|
|
|
|
scriptHelp() {
|
|
newline
|
|
printf "Update Cloudflare DNS host A/AAAA records with current IP address.\n"
|
|
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
|
|
textBlock "The only required parameter is '--records' which is a comma-delimited list of hostnames to update. However, there are several other options which may be useful to implement."
|
|
textBlock "Parameters are listed below and followed by a description of their effect. If a default value exists, it will be listed on the following line in (parentheses)."
|
|
newline
|
|
textBlock "${magenta}--- script related parameters ---${norm}"
|
|
newline
|
|
textBlockSwitches "-c | --cred | --creds | --credentials | -f (deprecated, backward-compatibility)"
|
|
textBlock "Path to file containing your Cloudflare *token* credentials. Please refer to the repo README for more information on format, etc."
|
|
textBlockDefaults "(${accountFile})"
|
|
newline
|
|
textBlockSwitches "-l | --log"
|
|
textBlock "Path where the log file should be written."
|
|
textBlockDefaults "(${logFile})"
|
|
newline
|
|
textBlockSwitches "--nc | --no-color | --no-colour"
|
|
textBlock "Switch value. Disables ANSI colours in the log. Useful if you review the logs using a reader that does not parse ANSI colour codes."
|
|
textBlockDefaults "(disabled: print logs in colour)"
|
|
newline
|
|
textBlockSwitches "--log-console"
|
|
textBlock "Switch value. Output log to console (stdout) instead of a log file. Can be combined with --nc if desired."
|
|
textBlockDefaults "(disabled: output to log file)"
|
|
newline
|
|
textBlockSwitches "--log-journal"
|
|
textBlock "Switch value. Output a structured log entry to your journaling system instead of a log file. Implies --nc."
|
|
textBlockDefaults "(disabled: output to log file)"
|
|
newline
|
|
textBlockSwitches "--no-log"
|
|
textBlock "Switch value. Do not create a log (i.e. no console, no file). You will not have *any* output from the script if you choose this option, so you will not know if updates succeeded or failed."
|
|
textBlockDefaults "(disabled: output to log file)"
|
|
newline
|
|
textBlockSwitches "-h | --help | -?"
|
|
textBlock "Display this help screen."
|
|
newline
|
|
textBlockSwitches "--examples"
|
|
textBlock "Show some usage examples."
|
|
newline
|
|
textBlock "${magenta}--- DNS related parameters ---${norm}"
|
|
newline
|
|
textBlockSwitches "-r | --record | --records"
|
|
textBlock "Comma-delimited list of hostnames for which IP addresses should be updated in Cloudflare DNS. This parameter is REQUIRED. Note that this script will only *update* records, it will not create new ones. If you supply hostnames that are not already defined in DNS, the script will log a warning and will skip those hostnames."
|
|
newline
|
|
textBlockSwitches "-i | --ip | --ip-address | -a | --address"
|
|
textBlock "New IP address for DNS host records. If you omit this, the script will attempt to auto-detect your public IP address and use that."
|
|
newline
|
|
textBlockSwitches "-4 | --ip4 | --ipv4"
|
|
textBlock "Switch value. Update Host 'A' records (IP4) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP6 switch, the last one specified will take effect."
|
|
textBlockDefaults "(enabled: update A records)"
|
|
newline
|
|
textBlockSwitches "-6 | --ip6 | --ipv6"
|
|
textBlock "Switch value. Update Host 'AAAA' records (IP6) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP4 switch, the last one specified will take effect."
|
|
textBlockDefaults "(disabled: update A records)"
|
|
newline
|
|
textBlock "Please refer to the repo README for more detailed information regarding this script and how to automate and monitor it."
|
|
newline
|
|
exit 0
|
|
}
|
|
|
|
stamp() {
|
|
(date +%F" "%T)
|
|
}
|
|
|
|
newline() {
|
|
printf "\n"
|
|
}
|
|
|
|
textBlock() {
|
|
printf "%s\n" "$1" | fold -w "$width" -s
|
|
}
|
|
|
|
textBlockDefaults() {
|
|
printf "%s%s%s\n" "$yellow" "$1" "$norm"
|
|
}
|
|
|
|
textBlockSwitches() {
|
|
printf "%s%s%s\n" "$cyan" "$1" "$norm"
|
|
}
|
|
|
|
writeLog() {
|
|
case "$1" in
|
|
cf)
|
|
printf "[%s] CF-ERR: %s (code: %s)\n" "$(stamp)" "$2" "$3" >>"$logFile"
|
|
;;
|
|
err)
|
|
printf "%s[%s] ERR: %s%s\n" "$err" "$(stamp)" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
error)
|
|
printf "%s[%s] ERROR: %s (code: %s)%s\n" "$err" "$(stamp)" "$2" "$3" "$norm" >>"$logFile"
|
|
;;
|
|
process)
|
|
printf "%s[%s] %s... %s" "$cyan" "$(stamp)" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
process-done)
|
|
printf "%s%s%s\n" "$cyan" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
process-error)
|
|
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
|
|
;;
|
|
process-warning)
|
|
printf "%s%s%s\n" "$warn" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
stamped)
|
|
printf "[%s] %s\n" "$(stamp)" "$2" >>"$logFile"
|
|
;;
|
|
success)
|
|
printf "%s[%s] SUCCESS: %s%s\n" "$ok" "$(stamp)" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
warn)
|
|
printf "%s[%s] WARN: %s%s\n" "$warn" "$(stamp)" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
warning)
|
|
printf "%s[%s] WARNING: %s%s\n" "$warn" "$(stamp)" "$2" "$norm" >>"$logFile"
|
|
;;
|
|
*)
|
|
printf "%s\n" "$2" >>"$logFile"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
### default variable values
|
|
scriptPath="$(CDPATH='' \cd -- "$(dirname -- "$0")" && pwd -P)"
|
|
scriptName="$(basename "$0")"
|
|
logFile="$scriptPath/${scriptName%.*}.log"
|
|
logToJournal=0
|
|
accountFile="$scriptPath/cloudflare.credentials"
|
|
colourizeLogFile=1
|
|
dnsRecords=""
|
|
dnsSeparator=","
|
|
ipAddress=""
|
|
ip4=1
|
|
ip6=0
|
|
ip4DetectionSvc="http://ipv4.icanhazip.com"
|
|
ip6DetectionSvc="http://ipv6.icanhazip.com"
|
|
invalidDomainCount=0
|
|
failedHostCount=0
|
|
|
|
### process startup parameters
|
|
if [ -z "$1" ]; then
|
|
scriptHelp
|
|
fi
|
|
while [ $# -gt 0 ]; do
|
|
case "$1" in
|
|
-h | -\? | --help)
|
|
# display help
|
|
scriptHelp
|
|
;;
|
|
--examples)
|
|
# display sample commands
|
|
scriptExamples
|
|
;;
|
|
-l | --log)
|
|
# set log file location
|
|
if [ -n "$2" ]; then
|
|
logFile="${2%/}"
|
|
shift
|
|
else
|
|
badParam null "$@"
|
|
fi
|
|
;;
|
|
--log-console)
|
|
# log to the console instead of a file
|
|
logFile="/dev/stdout"
|
|
;;
|
|
--log-journal)
|
|
# log to the journal system instead of a file
|
|
logToJournal=1
|
|
;;
|
|
--no-log)
|
|
# do not log anything
|
|
logFile="/dev/null"
|
|
;;
|
|
--nc | --no-color | --no-colour)
|
|
# do not colourize log file
|
|
colourizeLogFile=0
|
|
;;
|
|
-c | --cred* | -f)
|
|
# path to Cloudflare credentials file
|
|
if [ -n "$2" ]; then
|
|
if [ -f "$2" ] && [ -s "$2" ]; then
|
|
accountFile="${2%/}"
|
|
shift
|
|
else
|
|
badParam dne "$@"
|
|
fi
|
|
else
|
|
badParam null "$@"
|
|
fi
|
|
;;
|
|
-r | --record | --records)
|
|
# DNS records to update
|
|
if [ -n "$2" ]; then
|
|
dnsRecords=$(printf "%s" "$2" | sed -e 's/ //g')
|
|
shift
|
|
else
|
|
badParam null "$@"
|
|
fi
|
|
;;
|
|
-i | --ip | --ip-address | -a | --address)
|
|
# IP address to use (not parsed for correctness)
|
|
if [ -n "$2" ]; then
|
|
ipAddress="$2"
|
|
shift
|
|
else
|
|
badParam null "$@"
|
|
fi
|
|
;;
|
|
-4 | --ip4 | --ipv4)
|
|
# operate in IP4 mode (default)
|
|
ip4=1
|
|
ip6=0
|
|
;;
|
|
-6 | --ip6 | --ipv6)
|
|
# operate in IP6 mode
|
|
ip6=1
|
|
ip4=0
|
|
;;
|
|
*)
|
|
printf "\n%sUnknown option: %s\n" "$err" "$1"
|
|
printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
|
|
exit 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
### pre-flight checks
|
|
if ! command -v curl >/dev/null; then
|
|
printf "\n%sThis script requires 'curl' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
|
|
writePlainTextLog "'curl' must be installed and accessible" "fatal" "fail" "preexec" 2
|
|
exit 2
|
|
fi
|
|
if ! command -v jq >/dev/null; then
|
|
printf "\n%sThis script requires 'jq' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
|
|
writePlainTextLog "'jq' must be installed and accessible" "fatal" "fail" "preexec" 2
|
|
exit 2
|
|
fi
|
|
if [ -z "$dnsRecords" ]; then
|
|
badParam errMsg "You must specify at least one DNS record to update. Exiting."
|
|
writePlainTextLog "At least one DNS record to update must be specified" "fatal" "fail" "params" 1
|
|
fi
|
|
# verify the credentials file exists and is not empty (default check)
|
|
if [ ! -f "$accountFile" ] || [ ! -s "$accountFile" ]; then
|
|
badParam errMsg "Cannot find the Cloudflare credentials file (${accountFile}). Exiting."
|
|
writePlainTextLog "Cannot find the specified Cloudflare credentials file (${accountFile})" "fatal" "fail" "params" 1
|
|
fi
|
|
if [ "$logToJournal" -eq 1 ] && ! command -v logger >/dev/null 2>&1; then
|
|
printf "\n%sThis script requires 'logger' be installed to write entries to your journaling system. Exiting.%s\n\n" "$err" "$norm"
|
|
exit 2
|
|
fi
|
|
# turn off log file colourization if parameter is set
|
|
if [ "$colourizeLogFile" -eq 0 ]; then
|
|
bold=""
|
|
cyan=""
|
|
err=""
|
|
magenta=""
|
|
norm=""
|
|
ok=""
|
|
warn=""
|
|
yellow=""
|
|
fi
|
|
|
|
### initial log entries
|
|
writePlainTextLog "starting '${scriptName}'" "info" "ok" "script"
|
|
writePlainTextLog "script path: ${scriptPath}/${scriptName}" "debug" "ok" "startup"
|
|
writePlainTextLog "credentials file: ${accountFile}" "debug" "ok" "startup"
|
|
|
|
if [ "$ip4" -eq 1 ]; then
|
|
writePlainTextLog "mode: IPv4" "debug" "ok" "startup"
|
|
elif [ "$ip6" -eq 1 ]; then
|
|
writePlainTextLog "mode: IPv6" "debug" "ok" "startup"
|
|
fi
|
|
|
|
# detect and report IP address
|
|
if [ -z "$ipAddress" ]; then
|
|
# detect public ip address
|
|
if [ "$ip4" -eq 1 ]; then
|
|
if ! ipAddress="$(curl -s $ip4DetectionSvc)"; then
|
|
writePlainTextLog \
|
|
"Unable to auto-detect this machine's public IP address; try again later or supply the IP address to be used" "err" "fail" "detectip" 10
|
|
exit 10
|
|
fi
|
|
fi
|
|
if [ "$ip6" -eq 1 ]; then
|
|
if ! ipAddress="$(curl -s $ip6DetectionSvc)"; then
|
|
writePlainTextLog \
|
|
"Unable to auto-detect this machine's public IP address; try again later or supply the IP address to be used" "err" "fail" "detectip" 10
|
|
exit 10
|
|
fi
|
|
fi
|
|
writePlainTextLog "DDNS IP address (detected): $ipAddress" "info" "ok" "startup"
|
|
else
|
|
writePlainTextLog "DDNS IP address (supplied): $ipAddress" "info" "ok" "startup"
|
|
fi
|
|
|
|
# iterate DNS records to update
|
|
dnsRecordsToUpdate="$(printf '%s' "${dnsRecords}" | sed "s/${dnsSeparator}*$//")$dnsSeparator"
|
|
while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator" ]; do
|
|
record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
|
|
dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
|
|
|
|
if [ -z "$record" ]; then
|
|
continue
|
|
fi
|
|
writePlainTextLog "DNS host record '${record}' queued for update" "info" "ok" "startup"
|
|
done
|
|
|
|
### read Cloudflare credentials
|
|
case "$accountFile" in
|
|
/*)
|
|
# absolute path, use as-is
|
|
# shellcheck source=./cloudflare.credentials
|
|
. "$accountFile"
|
|
;;
|
|
*)
|
|
# relative path, rewrite
|
|
# shellcheck source=./cloudflare.credentials
|
|
. "./$accountFile"
|
|
;;
|
|
esac
|
|
if [ -z "$cfKey" ]; then
|
|
writePlainTextLog "Cloudflare authorized API key (cfKey) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 21
|
|
exit 21
|
|
fi
|
|
if [ -z "$cfZoneId" ]; then
|
|
writePlainTextLog "Cloudflare zone id (cfZoneId) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 22
|
|
exit 22
|
|
fi
|
|
writePlainTextLog "Cloudflare credentials file read successfully" "debug" "ok" "creds"
|
|
|
|
### connect to Cloudflare and do what needs to be done!
|
|
dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
|
|
if [ "$ip4" -eq 1 ]; then
|
|
recordType="A"
|
|
elif [ "$ip6" -eq 1 ]; then
|
|
recordType="AAAA"
|
|
fi
|
|
|
|
# iterate hosts to update
|
|
while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator" ]; do
|
|
record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
|
|
dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
|
|
|
|
if [ -z "$record" ]; then
|
|
continue
|
|
fi
|
|
|
|
# exit if curl/network error
|
|
if ! cfLookup="$(
|
|
curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records?name=${record}&type=${recordType}" \
|
|
-H "Authorization: Bearer ${cfKey}" \
|
|
-H "Content-Type: application/json"
|
|
)"; then
|
|
writePlainTextLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "cflogin" 3
|
|
exit 3
|
|
fi
|
|
|
|
# an API error on this GET request likely indicates an authentication error that would affect all remaining operations
|
|
# no reason to continue processing other dns records and pile-up errors which might look like a DoS attempt
|
|
cfSuccess="$(printf "%s" "$cfLookup" | jq -r '.success')"
|
|
if [ "$cfSuccess" = "false" ]; then
|
|
listCFErrors "$cfLookup" "cflogin"
|
|
writePlainTextLog "Cloudflare API error; review any previously logged 'CF-ERR:' lines for details." "err" "fail" "cflogin" 25
|
|
exit 25
|
|
fi
|
|
|
|
resultCount="$(printf "%s" "$cfLookup" | jq '.result_info.count')"
|
|
|
|
# skip to the next host if an existing host record cannot be found (this script *updates* only, does not create!)
|
|
if [ "$resultCount" = "0" ]; then
|
|
writePlainTextLog "Cannot find an existing record matching '${record}' to update" "warn" "warn" "ddns"
|
|
invalidDomainCount=$((invalidDomainCount + 1))
|
|
continue
|
|
fi
|
|
|
|
objectId=$(printf "%s" "$cfLookup" | jq -r '.result | .[] | .id')
|
|
currentIpAddr=$(printf "%s" "$cfLookup" | jq -r '.result | .[] | .content')
|
|
writePlainTextLog "The current IP address for '${record}' is ${currentIpAddr}" "debug" "ok" "ddns"
|
|
|
|
# skip to next hostname if record already up to date
|
|
if [ "$currentIpAddr" = "$ipAddress" ]; then
|
|
writePlainTextLog "The IP address for '${record}' is already up to date" "info" "ok" "ddns"
|
|
continue
|
|
fi
|
|
|
|
# update record
|
|
updateJSON="$(jq -n --arg key0 content --arg value0 "${ipAddress}" '{($key0):$value0}')"
|
|
|
|
# exit if curl/network error
|
|
if ! cfResult="$(
|
|
curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records/${objectId}" \
|
|
-H "Authorization: Bearer ${cfKey}" \
|
|
-H "Content-Type: application/json" \
|
|
--data "${updateJSON}"
|
|
)"; then
|
|
writePlainTextLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "ddns" 3
|
|
exit 3
|
|
fi
|
|
|
|
# note update success or failure
|
|
cfSuccess="$(printf "%s" "$cfResult" | jq '.success')"
|
|
if [ "$cfSuccess" = "true" ]; then
|
|
writePlainTextLog "The IP address for '${record}' successfully updated" "info" "ok" "ddns"
|
|
else
|
|
listCFErrors "$cfResult" "ddns"
|
|
writePlainTextLog "Unable to update the IP address for '${record}'" "err" "fail" "ddns"
|
|
# do not exit with error, API error here is probably an update issue specific to this host
|
|
# increment counter and note it after all processing finished
|
|
failedHostCount=$((failedHostCount + 1))
|
|
fi
|
|
done
|
|
|
|
# exit
|
|
if [ "$invalidDomainCount" -ne 0 ]; then
|
|
writePlainTextLog "${invalidDomainCount} invalid host(s) were supplied for updating" "warn" "warn" "ddns"
|
|
fi
|
|
if [ "$failedHostCount" -ne 0 ]; then
|
|
writePlainTextLog \
|
|
"${failedHostCount} host update(s) failed; review 'CF-ERR:' lines in this log to help determine what may have gone wrong" "err" "fail" "ddns" 26
|
|
exit 26
|
|
else
|
|
writePlainTextLog "${scriptName} completed successfully" "info" "ok" "script"
|
|
fi
|
|
|
|
### exit return codes
|
|
# 0: normal exit, no errors
|
|
# 1: invalid or unknown parameter
|
|
# 2: cannot find or access required external program(s)
|
|
# 3: curl error (probably connection)
|
|
# 10: cannot auto-detect IP address
|
|
# 21: accountFile has a null or missing cfKey variable
|
|
# 22: accountFile has a null or missing cfZoneId variable
|
|
# 25: Cloudflare API error
|
|
# 26: one or more updates failed
|
|
# 99: unspecified error occurred
|