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193 lines
6.9 KiB
193 lines
6.9 KiB
#!/bin/sh
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#
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#.Distributed under the terms of the GNU General Public License (GPL) version 2.0
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#
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# script for sending updates to cloudflare.com
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#.based on Ben Kulbertis cloudflare-update-record.sh found at http://gist.github.com/benkulbertis
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#.and on George Johnson's cf-ddns.sh found at https://github.com/gstuartj/cf-ddns.sh
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#.2016-2018 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
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# CloudFlare API documentation at https://api.cloudflare.com/
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#
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# This script is parsed by dynamic_dns_functions.sh inside send_update() function
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#
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# using following options from /etc/config/ddns
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# option username - your cloudflare e-mail
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# option password - cloudflare api key, you can get it from cloudflare.com/my-account/
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# option domain - "hostname@yourdomain.TLD" # syntax changed to remove split_FQDN() function and tld_names.dat.gz
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#
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# The proxy status would not be changed by this script. Please change it in Cloudflare dashboard manually.
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#
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# variable __IP already defined with the ip-address to use for update
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#
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# check parameters
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[ -z "$CURL" ] && [ -z "$CURL_SSL" ] && write_log 14 "Cloudflare communication require cURL with SSL support. Please install"
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[ -z "$username" ] && write_log 14 "Service section not configured correctly! Missing key as 'username'"
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[ -z "$password" ] && write_log 14 "Service section not configured correctly! Missing secret as 'password'"
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[ $use_https -eq 0 ] && use_https=1 # force HTTPS
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# used variables
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local __HOST __DOMAIN __TYPE __URLBASE __PRGBASE __RUNPROG __DATA __IPV6 __ZONEID __RECID __PROXIED
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local __URLBASE="https://api.cloudflare.com/client/v4"
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local __TTL=120
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# split __HOST __DOMAIN from $domain
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# given data:
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# @example.com for "domain record"
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# host.sub@example.com for a "host record"
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__HOST=$(printf %s "$domain" | cut -d@ -f1)
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__DOMAIN=$(printf %s "$domain" | cut -d@ -f2)
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# Cloudflare v4 needs:
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# __DOMAIN = the base domain i.e. example.com
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# __HOST = the FQDN of record to modify
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# i.e. example.com for the "domain record" or host.sub.example.com for "host record"
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# handling domain record then set __HOST = __DOMAIN
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[ -z "$__HOST" ] && __HOST=$__DOMAIN
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# handling host record then rebuild fqdn host@domain.tld => host.domain.tld
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[ "$__HOST" != "$__DOMAIN" ] && __HOST="${__HOST}.${__DOMAIN}"
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# set record type
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[ $use_ipv6 -eq 0 ] && __TYPE="A" || __TYPE="AAAA"
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# transfer function to use for godaddy
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# all needed variables are set global here
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# so we can use them directly
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cloudflare_transfer() {
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local __CNT=0
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local __ERR
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while : ; do
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write_log 7 "#> $__RUNPROG"
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eval "$__RUNPROG"
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__ERR=$? # save communication error
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[ $__ERR -eq 0 ] && break # no error break while
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write_log 3 "cURL Error: '$__ERR'"
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write_log 7 "$(cat $ERRFILE)" # report error
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[ $VERBOSE_MODE -gt 1 ] && {
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# VERBOSE_MODE > 1 then NO retry
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write_log 4 "Transfer failed - Verbose Mode: $VERBOSE_MODE - NO retry on error"
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break
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}
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__CNT=$(( $__CNT + 1 )) # increment error counter
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# if error count > retry_count leave here
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[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
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write_log 14 "Transfer failed after $retry_count retries"
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write_log 4 "Transfer failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
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sleep $RETRY_SECONDS &
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PID_SLEEP=$!
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wait $PID_SLEEP # enable trap-handler
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PID_SLEEP=0
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done
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# check for error
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grep -q '"success":true' $DATFILE || {
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write_log 4 "CloudFlare reported an error:"
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write_log 7 "$(cat $DATFILE)" # report error
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return 1 # HTTP-Fehler
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}
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}
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# Build base command to use
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__PRGBASE="$CURL -RsS -o $DATFILE --stderr $ERRFILE"
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# force network/interface-device to use for communication
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if [ -n "$bind_network" ]; then
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local __DEVICE
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network_get_physdev __DEVICE $bind_network || \
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write_log 13 "Can not detect local device using 'network_get_physdev $bind_network' - Error: '$?'"
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write_log 7 "Force communication via device '$__DEVICE'"
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__PRGBASE="$__PRGBASE --interface $__DEVICE"
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fi
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# force ip version to use
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if [ $force_ipversion -eq 1 ]; then
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[ $use_ipv6 -eq 0 ] && __PRGBASE="$__PRGBASE -4" || __PRGBASE="$__PRGBASE -6" # force IPv4/IPv6
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fi
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# set certificate parameters
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if [ "$cacert" = "IGNORE" ]; then # idea from Ticket #15327 to ignore server cert
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__PRGBASE="$__PRGBASE --insecure" # but not empty better to use "IGNORE"
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elif [ -f "$cacert" ]; then
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__PRGBASE="$__PRGBASE --cacert $cacert"
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elif [ -d "$cacert" ]; then
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__PRGBASE="$__PRGBASE --capath $cacert"
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elif [ -n "$cacert" ]; then # it's not a file and not a directory but given
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write_log 14 "No valid certificate(s) found at '$cacert' for HTTPS communication"
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fi
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# disable proxy if not set (there might be .wgetrc or .curlrc or wrong environment set)
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# or check if libcurl compiled with proxy support
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if [ -z "$proxy" ]; then
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__PRGBASE="$__PRGBASE --noproxy '*'"
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elif [ -z "$CURL_PROXY" ]; then
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# if libcurl has no proxy support and proxy should be used then force ERROR
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write_log 13 "cURL: libcurl compiled without Proxy support"
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fi
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# set headers
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__PRGBASE="$__PRGBASE --header 'X-Auth-Email: $username' "
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__PRGBASE="$__PRGBASE --header 'X-Auth-Key: $password' "
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__PRGBASE="$__PRGBASE --header 'Content-Type: application/json' "
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# read zone id for registered domain.TLD
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__RUNPROG="$__PRGBASE --request GET '$__URLBASE/zones?name=$__DOMAIN'"
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cloudflare_transfer || return 1
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# extract zone id
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__ZONEID=$(grep -o '"id":"[^"]*' $DATFILE | grep -o '[^"]*$' | head -1)
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[ -z "$__ZONEID" ] && {
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write_log 4 "Could not detect 'zone id' for domain.tld: '$__DOMAIN'"
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return 127
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}
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# read record id for A or AAAA record of host.domain.TLD
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__RUNPROG="$__PRGBASE --request GET '$__URLBASE/zones/$__ZONEID/dns_records?name=$__HOST&type=$__TYPE'"
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cloudflare_transfer || return 1
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# extract record id
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__RECID=$(grep -o '"id":"[^"]*' $DATFILE | grep -o '[^"]*$' | head -1)
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[ -z "$__RECID" ] && {
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write_log 4 "Could not detect 'record id' for host.domain.tld: '$__HOST'"
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return 127
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}
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# extract current stored IP
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__DATA=$(grep -o '"content":"[^"]*' $DATFILE | grep -o '[^"]*$' | head -1)
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# check data
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[ $use_ipv6 -eq 0 ] \
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&& __DATA=$(printf "%s" "$__DATA" | grep -m 1 -o "$IPV4_REGEX") \
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|| __DATA=$(printf "%s" "$__DATA" | grep -m 1 -o "$IPV6_REGEX")
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# we got data so verify
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[ -n "$__DATA" ] && {
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# expand IPv6 for compare
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if [ $use_ipv6 -eq 1 ]; then
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expand_ipv6 $__IP __IPV6
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expand_ipv6 $__DATA __DATA
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[ "$__DATA" = "$__IPV6" ] && { # IPv6 no update needed
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write_log 7 "IPv6 at CloudFlare.com already up to date"
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return 0
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}
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else
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[ "$__DATA" = "$__IP" ] && { # IPv4 no update needed
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write_log 7 "IPv4 at CloudFlare.com already up to date"
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return 0
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}
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fi
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}
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# update is needed
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# let's build data to send
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# set proxied parameter
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__PROXIED=$(grep -o '"proxied":[^",]*' $DATFILE | grep -o '[^:]*$')
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# use file to work around " needed for json
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cat > $DATFILE << EOF
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{"id":"$__ZONEID","type":"$__TYPE","name":"$__HOST","content":"$__IP","ttl":$__TTL,"proxied":$__PROXIED}
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EOF
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# let's complete transfer command
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__RUNPROG="$__PRGBASE --request PUT --data @$DATFILE '$__URLBASE/zones/$__ZONEID/dns_records/$__RECID'"
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cloudflare_transfer || return 1
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return 0
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